SU1393539A1 - Collet chuck - Google Patents

Abstract

The invention relates to the field of metalworking and can be used to secure rods to such machines. The purpose of the invention is to improve clamping reliability by providing stable self-tuning of the collet. The housing 1 has a tapered bushing 8, in the hole of which the outer collet 3 is located. In the tapered bore of the outer collet 3 an internal collet 2 is installed, designed to interact with the bent ends of the petals 11 of the stop nut 5. The bar 9 is stirred by the feed collet 10 and carries the inner collet 2 , opening it and turning the petals 11. After the rod 9 stops, the tapered sleeve 8 moves to the right and produces a clamp of the rod 9. 2.il. i (f. from 00 to 00 el 00 with f4 / g /

Description

The invention relates to metalworking and can be used to secure rods on automatic lathes.

The aim of the invention is to increase clamping reliability by providing stable self-tuning of the collet.

Figure 1 shows the cartridge, a longitudinal section; figure 2 - view And figure 1 about

The cartridge consists of a housing 1, in the conic bore of which an inner collet 2 is placed with an outer conical surface, the angle of which is within the friction angle for self-locking when clamping, and a series of | 1tsihs around the circumference and made from opposite sides of non-through longitudinal slits and one through longitudinal slit. The inner collet 2 is installed in the hole of the outer panga 3.

The outer collet 1 with spring 4 is clamped to the thrust nut 5. with collar 6, HaBvniqeTiHoA on the housing 1. To transfer the clamping force from the drive through the pipe clamp 7 serves as a taper bushing 8. Feed bar 9 is used to feed the bar 9. the stop and self-adjustment of the shoulder 6 of the stop nut 5 is made with slits J., forming petals 11 descending to the axis of the cartridge, with ends bent inward, intended for ILF interaction with the end of the inner pangu 2.

The cartridge works in the following way.

When it is unclamped, the rod 9 moves to the right with the help of the feed collet 10 (Fig. 1) and pulls the inner collet 2 to the right by means of adhesion, opening it and turning the petals 11 to the right, by the required amount to pass the bar 9. After the bar 9 stops at a stop (not shown) from the clamping drive, the pipe 7 moves to the right, pushes the conical sleeve 8 to the right, which with its conical surface squeezes the jaws of the outer collet 3, and that, in turn, compresses the inner collet 2, providing a bar clamp 9.

During unclamping, the tube 7 moves to the left, which is also facilitated by the spring A, holding the outer collet 3 pressed against the end with a small force to the retaining nut 5. The feed collet 10 again moves the bar 9.

Claims (1)

The spinning of the petals 11 to the right depends on the deviation of the diameter of the rod 9. Claims A collet chuck with an external collet with an inner collet installed in its conical bore in its bore hole, characterized in that, in order to increase the clamping reliability, the chuck is equipped with a collar nut mounted on the outer surface of the casing, on which cuts are formed that form converges to the axis of the cartridge is radial lobes with ends bent away from the inner collet, intended to interact with its end face. euffA Editor A. Shandor Compiled by A. Gribkov Tehred M.DNSJ Order 1912/11 Circulation 880 VNRSHPI State Committee of the USSR for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d. A / 5 FIG. I Proofreader A. Vorovich Subscription