Four-jaw chuck for preventing workpiece deformation

Abstract

The invention provides a four-jaw chuck for preventing workpiece deformation, which comprises a chuck body, claws and a claws equidistant linear displacement mechanism wherein a positioning surface and a clamping surface mutually vertical to each other are respectively arranged at the front end of a claws centripetal displacement mechanism; and the workpiece is contacted with a first-step concavetable formed by the clamping surface and the positioning surface; and the first-stage concave table is matched to the corresponding right-angle part of the periphery of the thin shell side wall of theworkpiece; wherein the positioning surface is tightly attached and supports the bottom of the workpiece; the clamping surface is tightly attached to the side wall of the thin shell at the periphery of the workpiece; and an inner concave avoiding groove for reducing the contact area is arranged at the contact area of the clamping surface and the side wall of the thin shell at the periphery of theworkpiece. The four-jaw chuck for preventing a workpiece deformation is characterized by not only ensuring the stability, the square linearity and the centering parallelism of the four-jaw chuck in the process of clamping the square workpiece, but also more effectively preventing the deformation of the clamped thin shell workpiece, and being particularly suitable for the processing application ofsquare thin shell parts.

Description

technical field [0001] The invention belongs to the technical field of chuck tooling, in particular to a four-jaw chuck capable of preventing deformation of thin-walled workpieces. Background technique [0002] The four-jaw chuck is divided into four-jaw self-centering chuck and four-jaw single-action chuck. The four-jaw chuck is composed of a disc body, four jaws, and four jaws driving displacement mechanism. Among them, the movement of the jaws on the disc body is achieved by using the principle of equidistant thread transmission to achieve linear displacement of equidistant centering; the positioning of the workpiece on the chuck is by adjusting the four linkage or non linkage jaws on the chuck. The relative position is achieved. In the prior art, the four-jaw chuck uses the plane of the upper end surface of the disc body as the workpiece positioning surface; uses the plane of the solid block in the displacement direction of the jaws to clamp the outer walls around the w...

AI Technical Summary

Problems solved by technology

[0003] The technical problem solved by the present invention is to provide a four-jaw chuck that prevents the deformation of the workpiece. By designing the jaws of the four-jaw chuck as positioning surfaces and clamping surfaces that are perpendicular to each other, and applying force to the right-angled ends around the workpiece, at the same time A concave avoidance groove is made on the clamping surface to reduce the contact area between the clamping surface and the workpiece, and solve the technical problem that the workpiece is easily deformed when the jaws clamp the square thin-walled shell workpiece in the prior art

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