US2379944A - Drilling machine - Google Patents

Description

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Patented July 10, 1945 UNITED STATES PATENT OFFICE DRILLING MACHINE Herbert J. Willmott, Beverly, Masa, asslgnor to United Shoe Machinery Corporation, Flemington, N. J., a corporation of New Jersey Application August 4,1943, Serial No. 497,415

12 Claims.

This invention relates to machines by which various drilling operations may be performed, it being especially applicable to the simultaneous production of a plurality of bores in shoe-heels. In Letters Patent of the United States No. 2,200,385, Eich, May 14, 1940, is disclosed a method of attaching heels to shoes. This method consists in inserting a group of nails in the heel-seat of a shoe in accordance with a chosen design, with portions of said nails projecting outwardly from the heel-seat-surface, forming in a heel at the cup passages coinciding in design and location with those of the nails in the heel-seat, and forcing the thus formed heel upon said nails. An object of my invention is to provide for drilling passages of this character in groups, the design of which may be varied readily and accurately, both in the relation of the passages to each other and that of the group to the work. It is also desired to eifect the drilling operation rapidly and with the necessity for little thought or effort upon the part of the operator. With this in view, the machine of the present invention consists more essentially of a mechanism by which a heel or other work-piece is located and held for the operation upon it, and a mounting by which a plurality of chucks or drill-holders may simultaneously be positioned in accordance with a particular design, there being relative reciprocation between the work-holding means and the mounting to produce the action of the drills. As particular features of the invention, improvements have been made in the mechanism by which heels of varying sizes are correctly positioned with reference to the drilling mechanism and clamped for the drilling operation; in the means for preventing injury by the drills to improperly located elements of the machine; and in the means for disposing of the waste produced in drilling.

There were filed in the United States Patent Ofiice on December 21, 1944, three divisional applications having the Serial 'Numbers 569,121, 569,122 and 569,123. These are directed, respectively, to the drilling mechanism, to the guiding means for the drill-chucks, and to the auxiliary hydraulic pressure mechanism.

One of the many possible embodiments of the invention is illustrated in the accompanying drawings, in which Fig. 1 shows my improved drilling machine in front elevation;

Fig. 2 is a side elevation thereof;

Fig. 3, a top plan view;

Fig. 4, an enlarged vertical sectional detail of the waste-removing means taken on the line IV-IV of Fig. 1;

Fig. 5, a perspective view of the heel-supporting breast-bar;

Fig. 6, an enlarged front elevation of the heelclamping mechanism;

Fig. 7, a vertical longitudinal section on the line VII-VII of Fig. 1, and including the heelholder and a portion of its actuating mechanism;

Fig. 8, an enlarged sectional detail of the indexing means for the vertical adjustment of the heel-clamping mechanism, taken on the line VIII-VIII of Fig. 1;

Fig. 9, a broken sectional detail through the shock-absorbing mechanism associated with the treadle;

Fig. 10, a broken front elevation of the guideplate for the drills;

Fig. 11, an enlarged front elevation of the drilling mechanism, with the means for varying the drilling design;

Fig. 12, a vertical section through the drillholders on the line XII-XII of Fig. 11;

Fig. 13, a sectional detail on the line XElL-XIII of Fig. 11;

Fig. 14, an enlarged longitudinal sectional detail through one of the drill-chucks;

Fig. 15, a similar view of the connection between the chuck and its flexible driving shaft;

Fig. 16, a, broken longitudinal section through said shaft;

Fig. 17, an enlarged transverse section on the line XVII-XVII of Fig. 16;

Fig. 18, an enlarged broken longitudinal section on the line XVIII-XVIII of Fig. 2, illustrating the yieldable reciprocating connection for the drill-slide; q

Fig. 19, an enlarged elevation of the drill-driving mechanism, looking from the left in Fig. 2;

Fig. 20, a vertical section on the line XXXX of Fig. 19;

Fig. 21, an irregular vertical transverse section taken at the left of Fig. 20, particularly showing the gearing through which the drills are driven;

Fig. 22, an enlarged central vertical longitudinal section through the cam and clutch mechamm;

Fig. 23, a transverse section on line XXIII- xxllIofFig. 22;

Fig. 24, a top plan view of the cover for the casing oi the cam and clutch mechanism;

Fig. 25, a vertical sectional detail of the auxiliary pressure mechanism, taken on the line XXV-XXV of Fig. 2; r

Fig. 26, an enlarged horizontal sectional detail through "the operator-actuated portion of the drill-setting mechanism on the line XXVL-XXVI of Fig. 1;

Fig. 2'1, an enlarged side elevation of the latching mechanism for the, clutch-tripping link;

Fig. 28, a top plan view of the-elements appearing in Fig. 27? v Fig. 29, a transverse section on the line XXIX- XXIX of Fig-n30, showing the means for guiding and clamping the drilling head; I

Fig. 3.0. atop plan view of the means for setting and clamping the drilling head;

Fig. 31, a front elevation of the actuating means for the heel-centering and clamping mechanism, taken back of the auxiliary pressure mechanism of Fig. 25;

Fig. 82, a vertical sectional detail on the line XXXII-X'XXII of Fig. 30;

Fig. 33, an enlarged top plan view of the outer end of the adjusting means for the depth of drilling, taken at the left of Fig. 32;

Fig. 34, a, horizontal sectional detail through the locking means for the depth-adjusting scale;

Fig. 85, an enlarged sectional detail of the looking means for one of the drill-holders, taken on the line XIDIV-XXXV of Fig. 11;

Fig. 36, a front elevation of said locking means;

Fig. 37, an enlarged sectional detail on the line XXXVII-XXXVH of Fig. 11;

Fig. 38, an enlarged horizontal sectional detail on the line XXXVIII-XXXVIII of Fig. 1.. particularly showing the waste-removing passages and conduits; and

Fig. 39, a-horizontal section through one of the chip-removing nozzles.

As best appears in Fig. 2 of the drawings, the machine comprises more essentially chuck mechanism A, by which a plurality of drills for operating upon heels may be held in individual chucks K and adjusted to difierent positions to give arrangements corresponding to a particular design in which nails have been inserted in the heelseat of a shoe to which the drilled heel is to be attached; driving mechanism B by which the drills are rotated through flexible and extensible connections X permitting drill adjustment; clutch, cam and fan mechanism C interposed between the motor or other source of power and the drill-driving mechanism; and clamping mechanism D with its actuating connections by which the heels are held for the drilling operation. These mechanisms will be considered separately.

Chuck mechanism A (Figs. 2, 3, 8, 11-18, 26, 29, 30 and 32-37) Upon spaced rods 58, 50, fixed horizontally from front to rear in the upper portion 01 the frame 52 of the machine (Fig. 2), a main drillactuating slide 54 is movable, and has supported upon it a mounting head 58 for drill-chucks K, here shown as five in number (Figs. 11 and 12). To the slide is imparted a reciprocation of unvarying extent to cause drills 58, held in the chucks, to operate upon the work. That the slide may move smoothly upon both the rods 58, without cramping, one of said rods passes through spaces 55 in the slide with substantial clearance. In each of these spaces the vertical play is taken up by a gib 51 on which the slide bears and which is adjustable by screws 59 threaded through the slide and bearing against the gib. A cam 50, rotatable by the mechanism C once during each operating cycle of the machine, by contact with a roll 8| rotatable on a bell-cranklever 82 fulcrumed at 64 upon the mechanism into the sleeve and against which the outer end C, oscillates said lever. A-roll 88 upon the lever 82 engages the closed end of a.thimble 88, movable through a bore in a lug 18 depending from the slide 54 (Fig. 18). A spring 12 is seated in the thimble 88 with its 0 posite extremity in an externally threaded mble I4, adjustable through an opening in the frame. By turning a nut 15 upon the thimble 14. there may be varied the force with which the spring urges a flange 18 upon the thimble 88 against the lug l0, and holds the slide 54 in its normal position with the drills retracted. This position is determined by the contour of the cam 60, in engagement with which the roll 5| is maintained by the spring. Between a. lug 18 depending from the slide and a sleeve 80 sliding in the frame, a spring 82 is interposed. This last-mentioned'spring is of such strength that it will resist the force necessary to advance the drill-slide 54 for the production of the deepest openings to be formed in-the work. It is under constant compression, its force being adjustable by rotation of a screw 84 threaded of the spring abuts. The expansive force of this spring 82 maintains the lug 18 of the slide in contact with a horizontal crossbar 88, bridged between a pair of links 88, 88 pivoted to the upper end of the lever 62. .these links are joined at 90, 90to the sleeve 88. The crossbar, the links and the sleeve move at all times with the lever and may be considered to be a portion thereof. They furnish a carrier for the spring 82. As the cam 88 oscillates the lever 52, its action upon the thimble 88 compresses the spring 12. This movement of the lever-portion 85 permits the spring 82, by its engagement with the lug 18, to move the slide 54 forward, so the drills 58 act upon the work. If any obstruction is encountered by the drills or slide which offers a resistance greater than the maximum drilling force, it merely causes the f compression of the spring 82, and no injury to the elements of the machine will result. When the lever 52 is allowed by the cam 50 to be swung back by the expansion of the spring 12, the slide 54 is retracted by the contact of the .fiange 15 with the lug 10 at a rate determined by the contour of the cam. This, and withdrawal of the drills from the work, will be rapid, so heating by idle rotation of said drills within the work isv minimized. The time of withdrawal may be a relatively small fraction of that required for the operating advance. Since the lug 18 and the screw 84, which furnish the abutments for the opposite ends of the spring 82 move together with the lever 52, the resistance to compression of said spring is unaffected by the depth of drilling: The action of the drills is therefore more uniform, and both the springs I2 and 82 may be of less strength than if the screw 84 were 'a normally fixed abutment. Since the operating force is applied to the drills through the spr g 2 and they are retracted by the spring 12,- their movement in both directions is cushioned and all shocks absorbed to give smooth reciprocation of the main slide 54.

To provide for drilling heels to different depths, the position of the mounting head 58 upon the main slide 54 is variable. For this purpose, the

mounting is fast upon an intermediate or sec-- ondary slide 92 movable in ways 94 upon the main slide. The connectionof the mounting to the At their rear extremities,

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