DE102009015919A1 - Device and method for producing at least one workpiece - Google Patents

Abstract

A device (23) for producing at least one workpiece (35) from a flat blank (34) of small wall thickness has a lower part (26), which has a first planar bearing surface (38) for the blank (34) and one of the first bearing surface (38) has a first facing away from the outside (39). Furthermore, an upper part (27) which can be placed on the lower part (26) and can be attached thereto is provided, which has a second plane bearing surface (41) for the blank (34) and a second outer side (42) pointing away from the second bearing surface (41). having. Upper part (27) and lower part (26) sandwich the blank (34) between the first and second bearing surface (38, 41). In the upper part (27) or the lower part (26) is provided from the outer side (42, 39) to the support surface (41, 38) extending working opening (45, 43), wherein the working opening (45, 43) has a flat Area of a recorded blank (34) releases for editing. The area corresponds in its areal dimensions (46, 47) to at least those (48) of the workpiece to be produced (FIG. 2).

Description

The The present invention relates to an apparatus and a method for producing at least one workpiece, preferably a circuit board for a clock, made of a flat Blank of small wall thickness.

such Method and devices in which a flat, thin blank a workpiece is made, are known. Under flat, thin blanks be in the context of the present invention, such workpieces understood, whose transverse dimensions are at least ten times as large like their thickness or wall thickness.

Special Problems prepare the production of such workpieces because the blanks have to be extremely flat extremely easy to be clamped so that they are at Do not warp or bend the cutting edge.

This Problem occurs in particular in the production of boards for the watch industry, because these boards have a diameter of for example 30 or 40 mm to a final thickness of about 1 to 2 mm and are made of round blanks with a wall thickness of made approx. 3 mm.

This Blank is in the usual way in a device clamped, in which case the pockets, recesses, holes, etc. milled or otherwise incorporated to the to pick up individual parts of the clock. The board must be from both sides as well as at least partially still on its circulating Front side are processed, for example, a strength of 1.5 mm.

An example of the processing of such boards is in the US 4,969,577 described where several boards above one another with a bottom plate and a cover plate screwed into a stack and then processed.

at the applicant from applications with their customers Devices are individual round blanks, so the circular blanks, or rectangles clamped, processed at the top, clamped and edited at the bottom.

In order to the blank after turning back in the correct position in the known device is clamped in the device dowel pins and in the blank Reference holes provided. This is to ensure Be that on the front and the top of the board to be manufactured pockets and recesses precisely aligned with each other are. However, it has been found that by this re-tightening The blanks encounter certain accuracy problems when the dowel pins and holes are not arranged exactly symmetrical to each other and to match each other on envelope.

The Ronde has a larger diameter as the final board, after the termination of the Machining process still a few webs with the outside left standing Ronde are connected.

After this finished this round plate with the inside held board and was removed from the device, the boards still need broken out of the stopped annular rim be, with the fractures are then still nachzubearbeiten.

The Processing such flat blanks with less Wall thickness to workpieces is more common in machine tools Design, so for example in traveling column machines, such as they are well known in the art. It is known, that in such machine tools so-called devices the work tables are clamped, these devices then for clamping the workpieces to be machined Blanks serve.

It is also known, instead of a workpiece table, a so-called Weighing device to use, for example, a weighing plate has, are screwed on the different devices can. This weighing device provides another processing axis it allows the pivoting of the device and thus held blank about a longitudinal axis, which is usually aligned parallel to the x or y axis of the machine tool.

In front In this background, the present invention has the object to provide a device of the type mentioned, with the flat blanks of low wall thickness processed into workpieces in a fast and highly accurate manner can be.

According to the invention, this object is achieved by a device of the initially named type, which has a lower part which has a first plane contact surface for the blank and a first outer side facing away from the first contact surface, and a upper part which can be placed on the lower part and fixable thereto; which has a second planar support surface for the blank and a second outer side facing away from the second support surface, wherein upper part and lower part of the blank sandwich between the first and the second support surface, in the upper part and / or the lower part is provided from the outside to the support surface extending working opening, and the work opening releases a flat portion of a recorded blank for processing, and the area in its planar Dimensions at least equal to those of the workpiece to be produced.

The The object underlying the invention is complete in this way solved.

By the sandwich-like clamping of the blank between upper part and Bottom part is made sure that too a not quite level blank is "smoothed out", so that when thinning the blank to the workpiece a flat workpiece can be produced.

By the work opening can pass the workpiece then either through the top or through the bottom to be edited. Because the work opening about the size corresponds to the workpiece to be produced, the blank is everywhere clamped where it does not need to be edited. This ensures a high-precision machining.

Usually the work opening is slightly larger be as the workpiece to be produced in its planar Dimensions, so that in the same clamping the workpiece even apart from a few webs already separated from the blank, So also can be edited extensively.

The Upper part can either directly over example. Projections or edge or indirectly via eg. Reference or Dowel pins are fixed to the base.

If the workpiece both at the bottom and at the It is preferable if in the top Lower part a first working opening and in the upper part a second work opening is provided.

Here It is advantageous that the blank is not removed from the device and needs to be transposed, but only the device be turned, which for example via a weighing device can be done.

By the sandwich-like bond between blank, upper part and lower part results in a stable composite, the blank against deflection and displacement protects.

On this way is a highly accurate and fast processing of flat, thin blanks to even thinner workpieces possible, as it did not from the state of the art so far was known.

there according to the inventors of the present application, it is possible from such a flat, thin-walled blank several workpieces, preferably boards, in a single clamping finished. Through this "multiple voltage" are Tool change times saved, as with a tool more Workpieces can be processed one after the other, before the tool needs to be changed.

In an embodiment will be made of a blank four boards made in a fixture in the device at their top and at their bottom as well as mostly can also be edited on their face.

There the blank itself is not processed on its outside is, with the new device is a fully automated production the boards possible, because the blank can first by means of a conventional gripper device on the lower part then the top part on the blank bearing base is placed and fixed to this. After that the described processing of the blank takes place to several boards.

To Termination of this processing is initially the top removed from the base and then the blank by means of the workpiece changing device (So the gripper) again as gripped, as in the insertion of the Blank.

Of the Blank can then be stored, for example, on a pallet.

In In a further development, it is preferred if the first on the lower part Holding means are provided to plan the blank on the first Set support surface on the lower part, in addition or alternatively be provided on the upper part second holding means Can to plan the blank on the second plane to set at the top.

By this measure will be the processing speed and the machining accuracy increased again, because of Blank is set after placing on the base so that he can not slip. After placing the lower part forms then a sandwich-like composite, in which between shell and blank as well as between blank and base each holding a Connection is made.

In addition to the orientation and alignment via the first and second holding means can still be provided on the upper part and / or lower part dowel pins, which are suitable for a perfect fit of the Blank as well as from top and bottom provide each other.

There However, the blank now no longer needs to be re-clamped are the usually associated with dowel pins and spans Problems eliminated.

there it is further preferred if the first and / or second holding means Vacuum generating suction means are the blank to the prime the first or second support surface.

at This measure is advantageous in that the blank by the suction surface on the two bearing surfaces is set, which ensures that the blank is very Aligned so that a highly accurate machining of whose top and bottom is guaranteed.

In In a further development, it is preferred if the first suction means a first vacuum channel open to the first bearing surface having the first work opening at least partially, preferably completely encloses, and / or when the second suction means to the second bearing surface open second negative pressure channel having the second working port at least partially, preferably completely encloses.

By the or each vacuum channel is easily a full-surface Sucking the blank to the first and second bearing surface guaranteed, so in a technically simple way for a good and reliable fixing of the blank between Upper part and lower part is taken care of.

The Vacuum channels can be completely or partially be designed as pockets that are suitable for a large area Aspirate the blanks on the bearing surfaces provide.

Generally it is preferred if the first recorded with blank and the second vacuum channel approximately opposite each other.

at This measure is advantageous that, so to speak closed power flow results, the blank is in the same Areas against both the first and second bearing surfaces sucked, leaving the blank by the exercise of negative pressure not warped but uplifted.

Further it is preferred if the first and / or the second vacuum channel by sealant at least to the corresponding Is sealed working opening, wherein the sealing means preferably Sealing rings or sealing tapes include, more preferably the first and / or the second vacuum channel of two sealing rings or Sealing tapes is edged.

at These measures is advantageous that the suction of the Blanks to the bearing surfaces even more efficient, because it is prevented by the sealing rings or sealing tapes, that air through the work opening or from the outside flows, which affect the sealing system could. The sealing tapes can be attached to vacuum pockets adapt to different contours.

Generally it is still preferable if the first and / or second work opening starting from the respective bearing surface conical extended to the respective outside.

These Measure is in terms of a highly accurate and fast Processing advantageous because it allows the use of very short clamped tools. When editing Circuit boards for watch making are - as already said - the finished workpieces only approx. 1 to 2 mm thick and have a diameter of, for example about 30 or 40 mm on, so the editing tools themselves Diameter in the range of 1 mm must have.

Around to work with these tools with high precision and speed, they have to be clamped very briefly, so the danger exists that the front of the tool holder, in which the tools are clamped, collided with the upper part or lower part. By the conically opening work opening becomes According to the invention space for immersion the tool holder created in the working opening, wherein on the other hand, the work opening in the area of the blank has a smaller diameter, so that there the blank with maximum area coverage between the top and the lower part can be clamped.

Generally it is still preferable if the lower part on a weighing device is fastened, wherein the lower part preferably on a weighing plate the weighing device is attached, and wherein in the weighing plate at least one passage is provided, the larger Querabmaße has as the first work opening in the first outside.

By this measure, that is, the inclusion of the blank in a 4th axis, the processing speed and machining accuracy is increased again, because the device itself does not have to be re-clamped, but is pivoted after processing one side of the weighing device only by 180 °, so that then the other side of the blank or the workpiece, so the board can be edited. Thus, this measure allows the processing of the raw lings on four sides in a single setup.

at the setting up of a machine tool for processing flat Blanks with the help of the new device, it is thus only once necessary to align the axes with high precision. By the pivoting of the device will then not be additional Inaccuracies caused when re-clamping the device, but especially when re-clamping the blank, forcibly occur.

Of the In the weighing plate provided passage with larger Querabmaßen than the work opening in the outside of the lower part prevents the collision of the tool holder with the weighing plate, so again with short clamped tools can be worked.

Generally it is then preferred if the upper part is a circumferential Edge has, which engages over the lower part.

Also this measure increases the secure clamping of the Blanks between top and bottom, because the peripheral edge the upper part is additionally oriented towards the Base. For example, this will ensure that that the first and the second working opening directly to each other opposite, in addition to it it is ensured that the vacuum channels also face each other, so that on a clamped blank in the same surface areas Force is exerted upward and downward. The power flow is thus closed, which prevents bending of the blank.

Of the circumferential edge increases the flexural rigidity of the upper part, which also contributes to the fact that the blank at Chucking does not bend or warp.

If an upper part with the lower part cross, circulating Edge is used, it is not mandatory, additional To use dowel pins to top, bottom and blank at the align first clamping to each other, this being the accuracy can increase further.

In a further development, it is then still preferred if in the edge at least one passage opening is provided, the one Border area of a recorded blank for editing releases.

at this measure is advantageous in that the edge of the workpiece, So the board, not only milled but frontal can also be processed in large peripheral areas, as well as two or more opposite passage openings can be provided.

If the machine tool has a swivel head, can be in this end face of the peripheral edge of the board also oblique holes and bring in pockets.

Generally it is preferred if the device for producing four Blanks is used from a blank, wherein in the upper part and / or the lower part to four adjacent work openings are provided.

• – Auflegen des Rohlings auf das Unterteil,
• – Festlegen des Rohlings auf dem Unterteil,
• – Aufsetzen des Oberteils auf das den Rohling tragende Unterteil,
• – Festlegen des Rohlings an dem Oberteil,
• – Bearbeiten einer ersten Seite des Rohlings durch die zumindest eine Arbeitsöffnung, wobei die Vorrichtung in Grundstellung ist,
• – Umspannen von Rohling oder Vorrichtung oder Schwenken der Vorrichtung aus der Grundstellung, vorzugsweise um 180°,
• – Bearbeiten einer zweiten Seite des Rohlings durch die zumindest eine oder die andere Arbeitsöffnung,
• – Freigeben des Rohlings von dem Oberteil und/oder dem Unterteil, Auseinandernehmen von Oberteil und Unterteil, Entnehmen des Rohlings mit dem darin noch über Stege gehaltenen Werkstück von dem Unterteil oder dem Oberteil.

In view of the above, the present invention also relates to a method for producing at least one workpiece, preferably a circuit board for a clock, from a flat blank of small wall thickness, by means of the new device, with the steps:

• - placing the blank on the lower part,
• - fixing the blank on the lower part,
• Placing the upper part on the lower part carrying the blank,
• - fixing the blank to the upper part,
• Machining a first side of the blank by the at least one working opening, the device being in the basic position,
• - re-clamping of the blank or device or pivoting of the device from the basic position, preferably by 180 °,
• Processing a second side of the blank by the at least one or the other working opening,
• Releasing the blank from the upper part and / or the lower part, disassembling the upper part and lower part, removing the blank with the workpiece still held therein by webs from the lower part or the upper part.

at These manufacturing methods are the advantages already discussed above realized. The blank is clamped between upper part and lower part, whereupon the first side of the blank passes through a work opening in the upper part or lower part is processed. After that either the blank or the device spanned, wherein when using a Weighing device, the device only from the basic position to pivot 180 ° before the second side of the blank can be processed through a working opening.

After that the blank is released from the upper part or the lower part, before top and bottom are separated. The blank will either held on the upper part or the lower part and can subsequently removed.

In this method, it is preferable if the blank by applying negative pressure to the Lower part and / or the upper part is determined.

As already mentioned, this measure has the advantage on that the blank is created extremely flat, so that a highly accurate Editing is possible.

At the vacuum channels can overpressure when removing the blank be applied so that the blank slightly from the bearing surfaces is lifted, which facilitates the removal and a bending of the finished workpiece prevents otherwise could "stick" to the bearing surfaces. In connection with the release of the blank, therefore, overpressure is preferably used, The blank is thus by applying overpressure of the Lower part and / or the upper part released.

Further it is preferred if the device relative to the basic position swiveled by 90 ° and the workpiece on his edited its first and second side connecting end face becomes.

at This measure is advantageous in that the blank is not only on its flat upper and lower sides but can also be edited on the front side, so that a Post-processing of the workpiece after breaking out the blank can be almost completely avoided, it only need to be reground the fractures of the webs become.

Further Advantages will be apparent from the description and the attached Drawing.

It it is understood that the above and the following yet to be explained features not only in the respective specified combinations, but also in other combinations or used alone, without the scope of the present To leave invention.

One Embodiment of the invention is in the drawing and will become more apparent in the following description explained. Show it:

1 a schematic front view of a schematic diagram of a machine tool with a weighing device on which the new device is clamped;

2 in a schematic exploded view of the new device 1 with lying between the upper part and lower part blank, in a section along the line II-II 3 ;

3 a plan view of the upper part 2 , seen in the direction of arrows III-III 2 ;

4 a plan view of an upper part for the production of four boards from a blank, seen along the arrows IV-IV 2 ;

5 a plan view of a blank with four processed boards, which are still supported by webs on the blank;

6 in a view like in 3 a partial view of a second embodiment of the upper part; and

7 in a view like in 3 a partial view of a third embodiment of the upper part.

In 1 is with 10 denotes a machine tool, which is shown only schematically and not to scale.

The machine tool 10 has a spindle head 11 on, in which a work spindle 12 is stored, which is a tool holder 14 carries, in the usual way a tool 15 is clamped.

The machine tool 10 is a traveling column machine in which the spindle head 11 opposite one at 16 indicated workpiece table or subframe in the three coordinates x, y and z is movable, as by a coordinate system 17 is indicated. So here are all three axes arranged in the tool.

It However, it can also be a different division of the axes between the workpiece and tools are selected, as for example in a cross table machine the case is where two axes in the workpiece and one axis are arranged in the tool.

In the present case is on the undercarriage 16 a weighing device 18 arranged, the two bucks 19 includes, at which pivotable about the x-axis a weighing plate 21 is attached. The pivoting is by an arrow 22 in 1 indicated.

On the cradle plate 21 is a device 23 attached, which is designed for machining of flat workpieces of low wall thickness.

In known manner, the spindle head 11 designed as a swivel head, it can be pivoted about the y-axis, which is indicated by an arrow 24 is indicated.

Due to the chosen construction can with the tool 15 at various points in the device 23 in a manner to be described clamped blanks a machining, for example, a milling or drilling, are performed, and due to the swivel head and oblique holes are possible.

As the device on a weighing device 18 is attached, can be adjusted by swinging the weighing plate 21 also perform a back side machining, including in the cradle plate 21 one at 25 indicated passage is provided by the tool 15 through the blank 34 can work on how it is now in detail in connection with the 2 is described.

In 2 is the device 23 shown in an exploded view, the device along the line II-II from 3 is shown cut.

The device 23 includes one on the cradle plate 21 attached lower part 26 as well as an upper part shown above 27 that one the top part 27 stiffening, circumferential edge 28 has, when putting on the upper part 27 on the lower part 26 this overlaps. At the top 27 are two hinged bars 29 vorgese hen, after putting on the upper part 27 on the lower part 26 in corresponding recesses 31 intervene on the lower part 26 are provided.

On the lower part 26 are still two dowel pins 32 to recognize that in corresponding holes 33 inside in the shell 27 intervention.

In this way can lower part 26 and top 27 accurately arranged to each other and locked together.

Between shell 27 and lower part 26 is schematically a flat blank 34 small thickness to recognize from the one at 35 indicated workpiece was made, the webs over 36 still with the blank 34 connected is.

In the blank 34 are two through holes 37 to recognize over which the blank 34 over the dowel pins 32 on the lower part 26 is oriented.

When laying on the lower part 26 comes the blank 34 on a support surface 38 of the lower part 26 to lie. With his from the bearing surface 38 pointing away outside 39 lies the lower part 26 on the cradle plate 21 and is attached there in a suitable manner.

If the blank 34 on the lower part 26 the upper part becomes 27 put on, making the top 27 with its support surface 41 on the blank 34 to come to rest. With his from the bearing surface 41 pointing away outside 42 has the lower part 26 then up.

In the lower part 26 is a work opening 43 provided, extending from the bearing surface 38 to the outside 39 initially expanded conically and then into a cylindrical section 44 passes in the plane of the outside 39 has a smaller area than the passage 25 in the cradle plate 21 ,

Correspondingly, in the upper part 27 a work opening 45 provided, extending from the bearing surface 41 to the outside 42 extends and to the outside 42 extended conically.

In the support surface 38 respectively. 41 have the work openings 43 respectively. 45 a diameter 46 respectively. 47 larger than the diameter 48 of the workpiece 35 ,

This way, the work openings give 43 and 45 a flat area of the blank 34 free from which the workpiece 35 can be worked.

Because of the conical design of the work openings 43 and 45 can the tool holder 14 partly in the work openings 43 and 45 penetrate, leaving the tool 15 the blank 34 over the entire diameter 46 respectively. 47 can handle without the risk of collision between lower part 26 or upper part 27 and tool holders 14 exists even if the tool 15 is clamped very briefly.

After the blank 34 for example through the work opening 45 through on his first page 49 has been edited, the entire device 23 with the sandwiched blank 34 pivoted by 180 ° so that the blank 34 now on his second page 51 through the work opening 43 can be processed through. In 2 it can be seen that the passage 25 in the cradle plate 21 is larger than the work opening 43 in the outside 39 ,

So that the blank 34 or the workpiece 35 also at its the first and the second page 49 and 51 connecting end face 52 can be edited is in the circumferential edge 28 of the top 27 a passage opening 53 provided by the tool 15 through the clamped blank 34 can handle when the device 23 by 90 ° from the in 2 shown basic position is pivoted.

To the blank 34 plan and firm on the support surfaces 38 and 41 are in the lower part 26 as well as the top 27 holding means 54 and 55 provided, each on the blank 34 one Apply negative pressure, so it to the support surface 38 respectively. 41 suck.

These holding means or suction means 54 . 55 each include a vacuum channel 56 respectively. 57 that the respective work opening 43 respectively. 45 encloses. From the vacuum channels 56 respectively. 57 go connection channels 58 respectively. 59 to olives 61 respectively. 62 at the top 27 or lower part 26 are arranged and the connection of the vacuum channels 56 respectively. 57 serve to a suitable vacuum or vacuum source.

The vacuum channels 56 and 57 are each of two circumferential sealing rings 63 respectively. 64 bordered so that when applying a corresponding negative pressure of the blank 34 both on the support surface 38 as well as on the support surface 41 sucked and held there.

In this way, a tailor-made arrangement of the blank results 34 on lower part 26 and top 27 , where likewise for a plane plant of upper part 27 , Blank 34 and lower part 26 is provided in the manner of a sandwich. This composite gives the blank 34 a high stability and ensures a flat plan system, so that from large but thin blanks 34 even thinner workpieces 35 can be made, which are upright.

The arrangement is made such that the two vacuum channels 56 and 57 face each other, so that a kind of closed frictional connection arises when the blank 34 sandwiched between lower part 26 and top 27 is recorded. Again, this ensures that the blank 34 not bent but just kept.

In 3 is a view of the shell 27 from the direction of the arrows III-III in 2 shown.

It can be seen that the sealing rings 64 as well as the vacuum channel 57 the work opening 45 completely surrounded so that the vacuum channel 57 both to the work opening 45 towards and to the contact surface 41 is sealed off.

Furthermore, in 3 to realize that in the edge 28 two through holes 53 are provided so that a tool through the through hole 53 through a workpiece 35 can work from two front sides.

The entire editing process is now done so that initially a blank 34 on the dowel pins 32 Threaded and on the support surface 38 of the lower part 26 is hung up. Then the blank is 34 there by applying negative pressure to the olive 61 to the support surface 38 sucked.

After that, the top part becomes 27 put on and locked, whereupon negative pressure to the olive 62 is applied, so that top 27 , Workpiece 35 and lower part 26 form a solid bond that the workpiece 35 keeps aligned.

The blank 34 will be on his first page 49 processed. Then the device becomes 23 pivoted by 180 °, and the blank 34 will be on his second page 51 processed. Then the blank is pivoted by 90 °, so that through the first through hole 53 through a part of the front side 52 of the blank 34 can be edited. After re-pivoting by 180 ° can then be through the opposite passage opening 53 another edge area of the blank 34 or the workpiece 35 to edit.

After that, the device becomes 23 once again swiveled by 90 °, whereupon first the top 27 and then the blank 34 with machined workpiece 35 be removed. To the thus processed blank 34 with the now very filigree workpieces 35 gently, so without the risk of bending, from the bearing surfaces 38 . 41 Being able to take off is through the olives 61 . 62 Air injected and thereby exerted a slight negative pressure, the blank 34 raising.

In the olives 61 . 62 injected air also serves to clean the various channels.

In the 2 and 3 is a shell 27 for processing only one workpiece 35 from a blank 34 shown, but it is also possible from a blank 34 several workpieces 35 to edit at the same time, what in the upper part 27 then, for example, four work openings 45 are arranged side by side, as shown schematically in 4 is shown. Of course, in a corresponding lower part 26 then four work openings 43 provided, with the weighing plate 21 then also four passages 25 needed. For clarity, this is not shown.

One with such a device 23 machined blank 34 is schematic in 5 shown. It can be seen that from the blank 34 a total of five workpieces 35 were processed, which can be, for example, boards for watches. The workpieces 35 are already processed on their peripheral side, they are only about some webs 36 with the blank 34 connected.

Although the workpieces 35 Filigree work has now been done by the recesses, through holes and cuts in 5 is merely indicated, the blank can 34 even outside about one at 65 indicated gripper are detected without the risk that the machin finished workpieces 35 to be damaged.

In this way it is possible to get a blank 34 first with the help of the gripper 65 automatically on a lower part 26 to set it up and remove it automatically after editing.

The area of in 3 shown vacuum channel 57 may be too low to the blank 34 on the contact surface 41 to hold with sufficient force, which is why the vacuum channels 57 may also be formed with or as pockets that provide a larger area over which negative pressure can be exerted on the blank.

In the 6 and 7 are two embodiments of tops 27 in the view of 3 shown in detail.

In the example according to 6 are vacuum bags 66 provided, the outside of sealing tapes 67 are surrounded and between the work openings 45 lie that they partially enclose. The work openings 45 do not need their own sealing rings here. The vacuum bags 66 have a small width between the edges 28 They are narrow in this direction.

In the example according to 7 is a vacuum bag 68 provided the two or more work openings 45 completely surrounds and outside of a sealing tape 69 is surrounded. The work openings 45 Here are each again from a sealing ring 64 surround. The vacuum bag 68 provides an even larger area for the exercise of negative pressure but requires between the edges 28 more space, so is wider.

Corresponding vacuum pockets 66 . 68 can also in the lower part 26 be provided.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• US 4969577 [0006]

Claims (23)

Device for producing at least one workpiece ( 35 ), preferably a circuit board for a clock, from a flat blank ( 34 ) of low wall thickness, with a lower part ( 26 ), which has a first planar bearing surface ( 38 ) for the blank ( 34 ) and one of the first bearing surface ( 38 ) away first outer side ( 39 ), one on the lower part ( 26 ) and attachable to this upper part ( 27 ), which has a second planar bearing surface ( 41 ) for the blank ( 34 ) and one of the second bearing surface ( 41 ) away second outer side ( 42 ), wherein upper part ( 27 ) and lower part ( 26 ) the blank ( 34 sandwiched between the first and second support surfaces (FIG. 38 . 41 ), in the upper part ( 27 ) and / or the lower part ( 26 ) one from the outside ( 42 . 39 ) to the support surface ( 41 . 38 ) extending work opening ( 45 . 43 ), the work opening ( 45 . 43 ) a flat area of a recorded blank ( 34 ) releases for processing, and the area in its areal dimensions ( 46 . 47 ) at least those ( 48 ) of the workpiece to be produced ( 35 ) corresponds. Device according to claim 1, characterized in that in the lower part ( 26 ) a first and in the top ( 27 ) a second work opening ( 43 . 45 ) is provided. Device according to claim 1 or 2, characterized in that on the lower part ( 26 ) first holding means ( 54 ) are provided to the blank ( 34 ) on the first flat contact surface ( 38 ) on the lower part ( 26 ). Device according to one of claims 1 to 3, characterized in that on the upper part ( 27 ) second holding means ( 55 ) are provided to the blank ( 34 ) on the second plane contact surface ( 41 ) at the top ( 27 ). Apparatus according to claim 3 or 4, characterized in that the first holding means ( 54 ) Are vacuum generating first aspirating means, the blank ( 34 ) to the first bearing surface ( 38 ). Apparatus according to claim 4 or 5, characterized in that the second holding means ( 55 ) Are second suction means generating negative pressure, the blank ( 34 ) to the second bearing surface ( 41 ). Apparatus according to claim 5 or 6, characterized in that the first suction means ( 54 ) one to the first bearing surface ( 38 ) open first vacuum channel ( 56 ) having the first work opening ( 43 ) at least partially, preferably completely encloses. Apparatus according to claim 6 or 7, characterized in that the second suction means ( 55 ) one to the second bearing surface ( 41 ) open second vacuum channel ( 57 . 66 ; 68 ) having the second work opening ( 45 ) at least partially, preferably completely encloses. Apparatus according to claim 7 or 8, characterized in that when received blank ( 34 ) the first and the second vacuum channel ( 56 . 57 ) are opposite each other. Device according to one of claims 7 to 9, characterized in that the first and / or the second vacuum channel ( 56 . 57 ) by sealing means at least opposite the corresponding working opening ( 43 . 45 ) is sealed. Apparatus according to claim 10, characterized in that the sealing means sealing rings ( 63 . 64 ) or sealing tapes ( 67 . 69 ). Apparatus according to claim 11, characterized in that the first and / or the second vacuum channel ( 56 . 57 ) of two sealing rings ( 63 . 64 ) is enclosed. Device according to one of claims 1 to 12, characterized in that the first and / or second working opening ( 43 . 45 ) from the respective bearing surface ( 38 . 41 ) starting conically to the respective outer side ( 39 . 42 ) extended. Device according to one of claims 1 to 13, characterized in that the lower part ( 26 ) on a weighing device ( 18 ) is attached. Device according to claim 14, characterized in that the lower part ( 26 ) on a weighing plate ( 21 ) of the weighing device ( 18 ), wherein in the weighing plate ( 21 ) at least one passage ( 25 ) is provided, which has larger transverse dimensions than the first working opening ( 43 ) in the first outside ( 38 ). Device according to one of claims 1 to 15, characterized in that the upper part ( 27 ) a peripheral edge ( 28 ), the lower part ( 26 ) overlaps. Device according to claim 16, characterized in that in the edge ( 28 ) at least one passage opening ( 53 ) is provided, each having a peripheral region of a recorded blank ( 34 ) releases for editing. Device according to one of claims 1 to 17, characterized in that dowel pins ( 32 ), the upper part ( 27 ), Lower part ( 26 ) and blank ( 34 ) keep each other aligned. Device according to one of claims 1 to 18, characterized in that for the production of four boards ( 35 ) from a blank ( 34 ) in the top ( 27 ) and / or the lower part ( 26 ) four adjacent work openings ( 43 . 45 ) are provided. Method for producing at least one workpiece ( 35 ), preferably a circuit board for a clock, from a flat blank ( 34 ) wall thickness, by means of a device according to one of claims 1 to 19, comprising the steps of: - placing the blank ( 34 ) on the lower part ( 26 ), - setting the blank ( 34 ) on the lower part ( 26 ), - placing the upper part ( 27 ) on the blank ( 34 ) supporting lower part ( 26 ), - setting the blank ( 34 ) at the top ( 27 ), - Edit a first page ( 49 ) of the blank ( 34 ) through the at least one work opening ( 43 . 45 ), the device ( 23 ) is in the home position, - rewinding of blank ( 34 ) or device ( 23 ) or pivoting the device ( 23 ) from the basic position, preferably by 180 °, - editing a second page ( 51 ) of the blank ( 34 ) through the at least one or the other work opening ( 43 . 45 ), - releasing the blank ( 34 ) from the top ( 27 ) and / or the lower part ( 26 ), Disassembly of upper part ( 27 ) and lower part ( 26 ), Removing the blank ( 34 ) with the still in it over bridges ( 36 ) held workpiece ( 35 ) of the lower part ( 26 ) or the upper part ( 27 ). Method according to claim 20, characterized in that the blank ( 34 ) by applying negative pressure to the lower part ( 26 ) and / or the upper part ( 27 ). Method according to claim 20 or 21, characterized in that the device ( 23 ) pivoted by 90 ° relative to the basic position and the workpiece ( 35 ) at its first and second side ( 49 . 51 ) connecting end face ( 52 ) is processed. Method according to one of claims 20 to 22, characterized in that the blank ( 34 ) by applying overpressure from the lower part ( 26 ) and / or the upper part ( 27 ) is released.