SU129465A1 - Conical thread chuck - Google Patents

Description

Known cartridges for tapering thread, in which the radial feed combs under the impact on their cams wedges, placed on the slide, irrespective of the sleeve, held in the working position by a locking mechanism, triggered when the specified length of the thread with the automatic opening of the combs is reached by the action of springs.

The disadvantages of such cartridges are the complexity of the design. significant size and weight. This limits the allowable speed and, consequently, performance.

The proposed cartridge is different from that known in that the axle rod is used in the chassis, which is connected with the slide of the radial iodach of the combs for its movement during the cutting process. The rod is provided with a pusher to act on the latch of the locking mechanism, which operates after the end of the rod stops at the end of the cut product.

This design provides a relatively small size and weight of the cartridge, which can reach: -1sthe increase in its rotational speed. The cartridge is equipped with two screwed one with the other, threaded rings, of which the inner one is fixed on the slider and the outer one sits on it freely. The outer ring is connected to a third ring connected through a medium. tsshilki with axial rod. When tightening one threaded ring, the other ocesoii is shifted along its axis. This allows adjustment of D1, al; the thread is cut.

FIG. Figure 1 depicted; described patrop in two projections (lipid-longitudinal axial section and left view with partial section): in FIG. 2- the same, 3 sections along aa and bb on F1; g. one.

No. 129465-2. The front working part of the chuck (Fig. 1) is a hollow cylindrical head / rigidly connected to the spindle 2. A sleeve 3 and a body 4, an injector wedge 5, are attached to the spindle in the T-shaped grooves of the head.

The body 4, the non-wedge wedge 5, axially mixed along the sleeve 3, acts by means of the wedges 5 on the cams 6, with which the combs 7 are connected. Inside the spindle 2, the rod 8 is displaced, mixing in the axial direction with an emphasis on the part being cut and acting on the automatic mechanism turning off the dies when the specified cutting length is reached.

To adjust the diameter of the thread to be cut, a threaded ring 9 is used, freely attached to the body 4 of the cartridge and connected to the rod 8 by means of a stud 10 (Fig. 2). The ring 9 is freely mixed along the body 4 axially when the threaded ring 11, the seat ring 12, rigidly connected to the body 4 rotates. The conical thread-cutting combs 7 attached to the cams 6 move or retract inside with the action of the body 4 with wedges 5. The housing 4 is fixed on the sleeve 3 by means of a key, and the sleeve 3 - on the spindle 2 also by means of a key.

The housing 4 with the wedges 5 acting on the cams 6 with the combs 7 is under the action of the springs 13 (Fig. 2), which tried to push it forward, but is held in the initial position by the screw 14. The sleeve 3 connected to the housing 4 by means of a screw 4, under the action of the przzhin 15, it tends to move in the direction of opening the dies, but is kept in working condition by a special lock. The lock consists of a retractable spring-loaded latch 16 located in the glass 17 fixed in the spindle bore and the rake 18 attached to the lock 3.

The lock is triggered when the specified thread length of the node is reached by the action of the rod 5 with the stop of the ring 19, located at the end of the rod, at the end of the cut part. In this case, the pusher 20 with the roller 21 at its end, fixed in the groove of the rod 8, slides over the surface of the catch 16 and, shifting it to the axis of the cartridge, disengages from the strap 18. Under the action of the springs 15, the sleeve 3 with the housing 4 moves back, as a result, the combs 7 open until the roller 21 contacts the catch 16, the rod 8 pushes the pin 10, and with it the body 4, as a result of which the cams 6 with the combs 7 smoothly slide apart in the slots of the head 1, thus forming a continuous tapered thread .

To adjust the diameter of the cut thread, turn the threaded ring 9 along the threaded ring 11 and, while stirring the ring 19 located at the end of the rod 8, relative to the dies, change the diameter of the cut thread.

Hollow screws 22 and 23, which are screwed into the rod 8, are designed to adjust the length of the thread. Ring 23 is fastened on screw 23, with which rod 5 rests on the part to be cut when the latch 16 is triggered and the thread-cutting dies are opened.

Subject invention

Claims (2)

1. A conical thread cutting cartridge, in which the radial feed of the drying combs, is affected by their wedges on the cams placed on a slider, which is moved by the locking mechanism in the working position, achieving a predetermined thread length with automatic opening of the dies by the action of springs, characterized in that, in order to reduce its size and weight and to increase as a result of its speed of rotation, an axial rod connected to the radial feed slider in the hollow spindle is used to move it to the cutting process and equipped with a pusher for acting on the latch of the locking mechanism after the abutment of the rod end at the end of the product being cut. 2. The cartridge according to claim 1, characterized in that, in order to control the diameter of the thread being cut, two threaded rings screwed one onto another are used, of which the inner one is fixed on the slider and the outer one is planted on it freely and connected to the third ring connected by means of a stud with an axial rod for its displacement when screwing one threaded ring onto another. - 3 - № 129465 Ui X, .. x x A-VV ; ®; js: x - SHYSH . -r-- f -X. ,,, - t. i1 i.i.Mo.l.Lll.B.L