SU529010A1 - Self-centering Cam Chuck - Google Patents

Description

one

The invention relates to the field of machine tools and can be used to fasten parts when machining on turning machines.

Self-centering cam cartridges with a two-angle wedge cam movement are known. However, in the well-known cartridges, the course of the cams with small dimensions is small, moreover, their wear resistance is also small.

The proposed device provides an increase in the course and speed of the Cams, as well as compactness and wear resistance of the structure.

For this purpose, the two-angle mechanism is made with a kinematic closure, and the planes of this mechanism, which provide for cam retraction, are displaced relative to each other in a direction perpendicular to the direction of cam movement.

FIG. 1 shows the proposed cartridge in axial section, general view; in fig. 2 is a section along the line A-A in FIG. in fig. 3 is a section along BB in FIG. 2

Clamping device for products

is a three-cam self-centering two-v-cartridge.

It consists of a housing 1, mounted on a plate 2, mounted on the flange end of the machine pin. In the central bore of the housing 1, there is a double-wedge thrust 3, which receives reciprocating movement from any drive. In the thicket 3, three T-shaped grooves 4 are made, at an angle of 13O, formed by planes 5 and 6 with a large angle of inclination for fast movements and planes 7 and 8 with a small angle of inclination for the force clamp. Moreover, the angular planes 6 and 8 are shifted in a direction perpendicular to the axis of the cartridge. On the sliders, there are three cross-shaped protrusions 10 and 11, on which the planes 7,12,13 and 14 are located with inclination angles corresponding to the angles of inclination of the planes 7,5,6 and 8 T-shaped grooves 4. The sliders 9 move in the radial direction along rectangular guides 15 formed by means of guiding strips 16 which are fixed to the housing 1. The cams 17 are rigidly

mounted on sliders 9. A sleeve 18 is mounted in case 1 to protect it from chips.

The proposed cartridge works as follows.

In the initial position, with the cams deployed 17, the wedge cartridge 17 of the cup 3 is in the far right half; With the borrowing of the stepped part 19, the cup 3 moves from any drive in the axle direction Elevo. At the beginning of the movement, the bipartisan angle of the 5,12,6 and 13 planes forms a wedge pair of fast cams 17. The cams at the same time have a large radial displacement for the approach to a smaller part diameter. Then, the angular planes 7 8, and 14 interact, to form a wedge pair of a slow power clamp with a high gear ratio. At the same time, the angular planes b and 13 gradually diverge. When unclamping part 19, cup 3 will move to the right. First, a slow forced release of the part occurs with the aid of the wedge pair and 14, and then, when the angular planes 6 and 13 are aligned, the cams 17 are quickly moved to remove the machined part from the cartridge. Moreover, in the quick cam retraction corner, the angular planes 7 of the cup 3 and the sliders 9 come out of contact.

Claims (1)

Invention Formula A self-centering cam chuck with a wedge two-angle cam movement mechanism, characterized in that, in order to increase the stroke and speed of the cams, as well as to ensure the compactness and durability of the design, the two-angle mechanism is made with a kinematic closure, and the planes of this mechanism ensuring cam retraction are mixed relative to each other friend in the direction perpendicular to the direction of movement of the cams. -H / 7 75 sixteen 1 kA -A / J // .Z 5-6 FIG. J