SU733872A1 - Collet chuck - Google Patents

Description

The invention relates to the field of machine-tool construction and can be used to secure workpieces in two months in length, for example, a bar in automatic lathes and lathes. A collet chuck with primary and secondary collets is known, the sponges and slots of which have the opposite direction, and the petals of the additional collet are located in the main slots. However, such a cartridge has a low processability. The aim of the invention is to expand the technological capabilities of the cartridge. The goal is achieved by the fact that, in the proposed cartridge, the additional collet is made of separate petals with a centralized part, the petal of the additional collet from the opposite conical surface of the sponge is provided with a protrusion and an annular groove under said protrusions is made in the main collet lips. FIG. 1 shows the described cartridge, cut; in fig. 2 is a view along arrow A in FIG. one; in fig. 3 shows a section BB in FIG. one; in fig. 4 shows a section B-B in FIG. one; in fig. 5 - section G-Y; in fig. 1. The cartridge (FIG. 1) consists of a main collet 1, connected to a clamp drive, by means of a pipe 2, and an additional collet 3 with a corrugated elastic part. The collet 3 is made of separate petals, the free ends of which contain protrusions 4 located in the annular groove 5 (Fig. 2) and interacting along the edges with a pair of adjacent jaws. Petals and sponges of the additional collet 3 are located in the main collet 1, which is held by a key 8 from rotation relative to the body of the cartridge 6 and the spindle 7. The conical part of the jaws of the additional collet interacts with the composite cone sleeve.

9, held assembled on the outside by two annular springs 10, and on the inside by a spring 11. The sleeve 9 bead rests against the end of the spindle 7 on one side and is pressed against the body of the cartridge 6 through the compensator 12 on the other side.

For clamping rods 13 of different diameters, replaceable liners 14 are used, which are attached to the additional collet with screws 15, and liners 16 for the main collet.

When the collet 1 is moved to the left, the collet 3 which simultaneously pinches the bar 13 moves at the same time, since the angle CX-2, the cone of the jaws of the additional collet is larger than the angle C6 of the cone of the jaws. The main collet.

Then the final clamping of the bar with the jaws of the main collet 1 takes place. The clamping force with the additional collet is determined by the stiffness of the elastic corrugated part of the petals.

The release of the rod is carried out by actuating the clamping mechanism when the tube 2 is moved together with the collet 1 to the right.

The economic efficiency of the pre-assembled design of the collet chuck is due to an increase in the stiffness of the fastener and a reduction in the chuck. on his

ten

 ..... i ..., 2 L.

manufacturing and service. The increase in stiffness allows an increase in the allowances for machining and, consequently, the productivity of machining of parts from the bar on automatic lathes and car-turret machines.

Claims (1)

1. USSR author's certificate No. 319400, cl. B 23 B 31 / 2O, 197O. kf Vida Phi2.2 h Yr