CN2043534U

CN2043534U - Automatic screw-turning device

Info

Publication number: CN2043534U
Application number: CN 88217396
Authority: CN
Inventors: 徐旭东; 沈孟养; 陈洪根; 郑容�
Original assignee: Wuxi Taihu Machine Tool Accessory Factory; Jiangnan University
Current assignee: Jiangnan University
Priority date: 1988-08-05
Filing date: 1988-08-05
Publication date: 1989-08-30

Abstract

The utility model relates to an improved automatic screw-turning device, comprising a transmission mechanism, a longitudinal host machine body with gap adjusting elements and a compensating mechanism for errors, a transverse host machine body provided with an end cam and a tool holder. The utility model is particularly suitable for processing the short screw threads of 50 mm comprising taper screw threads. The utility model has the advantages of high precision, low cost and convenient operation. The automatic screw-turning device can do the turning for an excircle and a chamfering before doing the turning for screw threads.

Description

Automatic screw-turning device

The utility model relates to a kind of improved automatic turning screw device, and it belongs to the machine tool accessories of cutted thread on engine lathe.

Cutted thread is mainly manually-operated on engine lathe at present, in general the withdrawing time in the cutted thread process all be very short, the necessary high concentration of thought when the workman operates for this reason, labour intensity is big, and causes the accident easily and waste product because of withdrawing is untimely.In recent years adopted quick cutting thread device abroad, it has overcome the shortcoming of artificial cutting thread.Yet, because the required precision height of screw thread own, add because of increasing the cutted thread device inline driving-chain that extended, therefore just higher to the required precision of cutting thread device, the processing technology complexity, difficulty of processing is big, the special process equipment of needs, production cost height; Owing to the deep-cutting screw threads such as feed genus of this device, the high-precision screw thread of turning is not easy to reach requirement for this reason again; There is this device to have only a kind of quick cutter holder again again, can not car outer garden and chamfering etc.

The purpose of this utility model is to provide a kind of processing technology comparatively simple, assembling easily, and reliable operation, the outer garden of energy car, chamfering can be finished various short threads automatically before the cutted thread, comprise the automatic turning screw device of taper thread.

The purpose of this utility model is finished by following measures:

Power is delivered to being provided with of vertical main body from lathe leading screw afterbody through transmission mechanism and eliminates on the worm screw of gap adjustment element, worm screw and actuated element engagement, drive a mechanism that has error compensation with the upper strata cam of the coaxial double-deck cam of actuated element, the vertical main body that makes it to be connected with compensation mechanism travels longitudinally along lathe spindle.

Lower floor's cam of double-deck cam drives another roller, by the needle tray on the push rod motion is converted to transverse movement, thereby drive horizontal main body and do transverse movement, laterally be provided with controlling organization in the main body, when each vertical main body returns, the collision block that is installed on the lower support pushes up the roller of going up on the ratchet shaft, ratchet shaft just moves up, ratchet is stirred ratchet and is rotated, be arranged on edge cam with coaxial ratchet also along with rotation, thereby change the cutting-in of each feed, and coordinate the action of lathe tool cutted thread advance and retreat cutter.Along with the turning number of times increases, when screw thread processing was soon finished, each depth of cut was successively decreased, and total thread turning degree of depth increases, and finishes when each turning action, and lathe tool is with regard to the fast automatic workpiece of recessing, this device is finished the cutted thread working cycles like this, obtains qualified product at last.

This device is except that having the quick change cutter holder, and also increasing has manual three revolution cutter holders and fixed cutter holder.

For this reason, the accuracy of thread height of the utility model turning, be applicable to be shorter in length than 50mm, the thread form degree of depth less than the short thread of 3.5mm, taper thread, trapezoidal, triangle is public, inch screw thread comprises no undercut, the root screw thread of stopping, and is particularly useful for batch machining.

The utility model describes in detail embodiment below in conjunction with accompanying drawing:

Fig. 1 is the utility model automatic turning screw device working state figure;

Fig. 2 is the utility model front view;

Fig. 3 has the worm screw installation diagram that element is adjusted in the gap for the utility model;

Fig. 4 is eccentric copper sheathing front view;

Fig. 5 is the roller front view that has eccentric bushing;

Fig. 6 is edge cam master, left view;

Fig. 7 is manual three revolution cutter holders;

Fig. 8 is fixed cutter holder.

To accompanying drawing 4, the utility model comprises with reference to accompanying drawing 1: transmission mechanism, vertically main body, laterally main body, lower support and cutter holder.Transmission mechanism is made of minor axis, gear, idle wheel, universal coupling, splined shaft, spline sleeve and lid.

Vertically main body comprises worm screw, bearing, helical gear, double-deck cam, eccentric copper sheathing, eccentric roller, vertically gliding mass, the edge of a knife, push rod spring and trip bolt constitute.

Laterally main body comprises roller, collision block, ratchet, pawl axis, adjustment nut, ratchet, edge cam, axle, laterally gliding mass, slide block constitute.

The utility model automatic turning screw device is installed on the lathe cross slide, power is delivered on the worm screw 1 that is provided with elimination gap adjustment element of vertical main body through leading screw and transmission mechanism, for example with the meshing error of eccentric copper sheathing 2 in order to compensation worm screw 1 and Dou gear 3, improve transmission accuracy, drive a mechanism that has error compensation with the upper strata cam of the coaxial double-deck cam 4 of Dou gear 3, for example with the roller 7 of eccentric bushing, as accompanying drawing 5 in order to compensation because of the cumulative pitch error of making and rigging error causes, drive vertical gliding mass 10 and travel longitudinally along lathe spindle by being connected in attachment screws 8 in the eccentric roller 7, the movement locus of lathe tool on workpiece is required helix.

When stroke of vertical main body is intact soon, lower floor's cam of double-deck cam 4 drives another roller 5 again, the Connection Element 6 that is linked together with roller 5 drives push rod 9, the other end of push rod 9 has skewed slot, and laterally the slide block 21 on the main body enters the transverse movement that push rod 9 skewed slots convert the lengthwise movement of vertical gliding mass 10 to horizontal gliding mass 19.

Laterally be provided with controlling organization in the main body, when each vertical main body returns, be installed in the collision block 16 top upper rollers 15 on the lower support 20, the pawl axis 13 that is connected with roller 15 moves up, thorn claw 11 is stirred ratchet 12 and is rotated certain angle, is arranged on the coaxial edge cam 17 of ratchet 12 and also rotates equal angular thereupon, and for example edge cam 17 working faces are made of as accompanying drawing 6 multistage step, make and harden with machine-tooled method, in order to the each feed depth of cut of automatic change.When edge cam 17 working surfaces were run into the edge of a knife 18 on vertical main body, laterally the main body motion was just stopped.Vertically main body is fast automatic again when returning, and ratchet 12 changes a position again, and motion enters next cutted thread working cycles again.When screw thread processes soon, variations that taper off of each depth of cut, when meeting the requirements of cutting depth, the fast automatic workpiece of recessing of lathe tool is got back to original position, and the cutter coordination of advancing and retreat is reliable.Change the design of edge cam working face, the equidistant radial feed in the time of can realizing cutting thread, successively decrease radially feed and no feeding light are repaiied screw thread.This embodiment edge cam 17 adopts the radially feed of successively decreasing to repair screw thread with final no feeding light.Thereby the thread quality of processing is good, efficient is high.

Embodiment 2, in the time will processing taper thread, just a whole set of cutted thread device moved the angle of needs with respect to the lathe spindle axis.

When lathe not during machining screw, need only become flexible the lower support screw, to pull down whole device and change former tool post lathe is restored to the original state rapidly, operation and mounting or dismounting are convenient.

The utility model also is the automation modular device of a kind of " omnipotent combination ", and it can also be as the functional part of all kinds of building-block machine cutting threads.

The utility model as accompanying drawing 7,8, has also increased manual three Huis rotors folder and fixed cutter holder except that the quick change cutter holder.

The utlity model has obvious effect and advantage:

The short thread that automatic screw-turning device is specially adapted to process 50mm comprises taper thread, no undercut, the root screw thread of stopping, the machining accuracy height, but before the cutted thread also outer garden, chamfering of car, reduced cost, easy to operate, be particularly useful for batch machining.

Claims

1, a kind of by transmission mechanism, the vertical, horizontal main body, the automatic turning screw device that the lower support cutter holder constitutes is characterized in that:

The worm screw of A, vertical main body is provided with the gap and adjusts element, worm screw and actuated element engagement, and double-deck cam driving mechanism of having error compensation coaxial with actuated element, the vertical main body that makes it to be connected with error compensation mechanism travels longitudinally along lathe spindle.

The ratchet shaft of B, horizontal main body is provided with edge cam, in order to change the cutting-in of each feed.

C, described cutter holder increase manual three revolution cutter holders and fixed cutter holder except that the quick change cutter holder.

2,, it is characterized in that it is eccentric copper sheathing that element is adjusted in the gap that is provided with on the worm screw by the described automatic turning screw device of claim 1.

3, by the described automatic turning screw device of claim 1, it is characterized in that error compensation mechanism is the roller that has eccentric bushing.

4, by the described automatic turning screw device of claim 1, it is characterized in that the edge cam working face is made of multistage step.