SU1505677A1 - Clamping self-centering device - Google Patents

Abstract

The invention relates to a machine tool industry, and more specifically to devices for securing workpieces or tools on machine tools. The purpose of the invention is to expand technological capabilities and simplify the design. In the housing 1, guides 2 are formed, forming an equilateral triangle 6. The cams 3 are made in the form of wedges with guiding faces 4 and working faces 7, and the faces 7 form an equilateral triangle 8 of variable perimeter. Triangles 6 and 8 have a common center 9. On the cams 3, there are additional sponges 11 in slots 12 and 13, which form two equilateral triangles 14 and 15 centered at point 9. The mechanism 16 is connected to one of the cams 3 and is parallel to its direction. 4. Depending on the diameter of the workpiece or tool, when one of the cams 3 moves from the drive, it is clamped either by edges 7 or by additional jaws 11. 2 Il.

Description

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The invention relates to a machine tool industry, and more specifically to devices for securing blanks or tools on machine tools.

The aim of the invention is to expand the technological capabilities while simplifying the design.

FIG. 1 shows the surface of the device, front view; in fig. 2 shows section A-A in FIG. one.

The device comprises a housing 1 with guides 2, in which three cams 3 are placed, made in the form of wedges. The cams 3 are mated with each other so that their guide faces 4 are always in contact with the guides 2 of the housing 1 and form an equilateral triangle of fixed perimeter on the front surface .5 of the device. The working faces 7 of the cams 3 form on the same surface 5 an equilateral triangle 8 of variable perimeter. In this case, triangles 6 and 8 have a common center 9. The sharp angle of the clip is 30 °. The bluntness is formed by two planes, and the preferred embodiment of the device is when the cam stroke is 1/4 of the length a - side of the constant perimeter triangle.

The guiding bodies 2 and the guiding faces 4 of the cams 3 are inclined to the surface 5 of the device in such a way that they form a regular triangular truncated pyramid, the smaller base 10 of which is located on the front surface 5. The angle of the axis formed by the guiding face 4 and I is the plane perpendicular to the front surface of the first 5, made more than the friction angle in the range of 9-13 °. At least one part of the body with the support surface is made removable.

The device is equipped with three additional removable clamping jaws 11, which are fixed on the front surface of the cams 3. For this, each fist has its own bluntness and has at least two sockets 12 and 13 located in the vertices of the equilateral triangles 14 and 15 centers at point 9. At the same time, the distance from center 9 to the centers of the nests 12 attached by cams 3 apart is larger than the distance from the center 9 to the centers of the nests 13: when the cams are flattened 3. Working surfaces of the sponges 11 ipoTHbiMH can be performed (not shown).

The cam movement mechanism 16, on the example of the screw one, is associated with one of the cams 3, and its axis 17 is parallel to the guide face 4 and the front surface of this

fist. A part of the mechanism 16 (FIG. 1) is placed in the cavity of the cam 3, while a groove 18 is made in the adjacent cam. However, the mechanism 16 can be disposed also in

housing 1, and its connection with the cam is designed as a leash.

The device works as follows.

Depending on the diameter of the product it

can be clamped by working faces 7 of the cams or removable jaws 11, which are mounted on the front surface of the cams in the slots 12 or 13. The cams 3 are separated by the mechanism 16, the product is placed between the clamping edges. The clamping of the product is carried out by clamping the cams 3 by the mechanism 16.

The proposed device allows to simplify the design of the self-centering clamping device and extend technological capabilities by expanding the range of clamping product diameters on the device of one size, as well as by using it for clamping parts on marking tables, milling, slotting tables, rotary tables.

and other machines.

Claims (1)

Invention Formula A clamping self-centering device comprising a body with guides forming an equilateral triangle, in which three jaws are placed in relative movement with wedges with guides and working edges forming an equilateral triangle of variable perimeter on the front surface of the device, coinciding the center of the guide bodies, as well as the axial drive associated with one of the cams, characterized in that expansion of technological capabilities while simplifying the design, the guiding faces of the cams and the guide bodies are made in the form of a regular truncated pyramid with edges inclined to the front surface of the device with a smaller base located on the same surface, while the device is equipped with additional removable clamping jaws placed on cams and located in the vertices of equilateral triangles with a common center coinciding with the center of the triangle body formed by The actuator is located parallel to the guide face of one of the cams.  Rig. 2