Wear-proof casing clamp with adjustable external diameter

Abstract

The invention discloses a wear-proof casing clamp with an adjustable external diameter. The clamp comprises mandrels which are matched with the tip of a machine tool, wherein a support frame is fixedly installed in the middle parts of the mandrels, a support plate is connected onto the peripheral surface of the support frame, can be radially stretched and is provided with a bottom end face which is a bilaterally symmetrical inclined plane, and a stretching tension spring is installed on the support plate and pulls the support plate towards the mandrels; the mandrels on the left and right ends of the support frame are connected with a sliding seat through flat keys in a sliding manner, the peripheral surface of the sliding seat is an arc inclined plane, is the same as the inclined plane of the support plate in gradient and is oppositely inclined, and the inclined plane of the sliding seat is directly contacted with the inclined plane of the support plate and pushes the support plate to do radial stretching motion; and one side of the sliding seat, which is back on to the support frame, is connected with driving and reversing nuts for driving the sliding seat to slide left and right along the axial direction, and the driving and reversing nuts are in threaded connection onto the mandrels. A current mode of adopting dumb mandrels to be matched with wear-proof casing workpiece bores for clamping is dispensed, and the clamp is simple in structure, and has strong universality and high clamping efficiency.

Description

technical field [0001] The invention relates to a clamp, in particular to a wear-resistant sleeve clamp with adjustable outer diameter which is used on a wear-resistant sleeve to further process and grind the outer wall of the wear-resistant sleeve. Background technique [0002] For the wear-resistant sleeve workpiece, according to the technical requirements of the part, the inner and outer walls of the part need to be further processed. The dimensional requirements such as the accuracy of the inner hole can be achieved by finishing the corresponding technical requirements, while the outer wall needs to be achieved by grinding. , because the workpiece is a wear-resistant sleeve, the wall is thin and easy to deform, so it cannot be directly clamped by ordinary chucks. At present, the method of dull mandrel is generally used to solve the problem of easy deformation of clamping. Refer to figure 1 , that is, for different workpieces 12, different dull mandrel fixtures 13 are use...

AI Technical Summary

Problems solved by technology

[0002] For the wear-resistant sleeve workpiece, according to the technical requirements of the part, the inner and outer walls of the part need to be further processed. The dimensional requirements such as the accuracy of the inner hole can be achieved by finishing the corresponding technical requirements, while the outer wall needs to be achieved by grinding. , because the workpiece is a wear-resistant sleeve, the wall is thin and easy to deform, so it cannot be directly clamped by ordinary chucks. At present, the method of dull mandrel is generally used to solve the problem of easy deformation of clamping. Refer to figure 1 , that is, for different workpieces 12, different dull mandrel fixtures 13 are used to support grinding. For example, a workpiece with an inner hole of Φ198+0.0450 is ground with a dull mandrel fixture 13 of Φ1980-0.018. The workpiece of Φ194+0.0450 is ground with the Φ1940-0.018 dull mandrel fixture 13 to support the grinding, but because the accuracy of the inner hole has a certain tolerance range, and the coaxiality of the inner and outer diameters is difficult to guarantee, and the workpiece circle The error of the degree and cylindricity makes it time-consuming and labor-intensive to assemble the core and install the fixture. Sometimes it is even necessary to use knocking or strong pressing to assemble, which will cause the inner hole of the workpiece to be strained, resulting in the unqualified quality of the workpiece. , or even scrapped. In addition, workpieces with different inner hole sizes need to be equipped with different dull mandrel fixtures, which makes the dull mandrel fixtures unable to be used universally, which greatly reduces work efficiency.

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