Adjustable-diameter device used for lathing outer cylindrical surfaces

Abstract

The invention relates to an adjustable-diameter device used for lathing outer cylindrical surfaces. The adjustable-diameter device is applicable to machining of outer cylindrical surfaces of outer-cylindrical-surface workpieces with central angles smaller than 180 degrees, and comprises a mandrel and a clamping body. Two ends of the mandrel are provided with two cylinders respectively, the end face of each cylinder is provided with a center hole, a mandrel body is arranged in the middle of the mandrel and provided with a rectangular through groove axially perpendicular to the mandrel, and the clamping body is inserted into the rectangular through hole. The end face of the mandrel body is provided with an elongated hole in the same direction as the rectangular through groove, the clamping body is provided with a threaded hole, a workpiece is positioned and clamped on the clamping body, and the clamping body is fixedly locked onto the mandrel by the aid of a screw which penetrates through the elongated hole of the mandrel body and the threaded hole of the clamping body. The adjustable-diameter device has the advantages that diameter adjustability in machining of workpieces which are not integrally cylindrical surface type workpeices is realized, clamping of outer-cylindrical-surface workpieces with different diameters within a certain range can be realized, and thickness fine adjustment in machining of the workpieces is benefited.

Description

technical field [0001] The invention relates to a device for turning and grinding an outer cylindrical surface, in particular to a device for turning and grinding an outer cylindrical surface with adjustable diameter. Background technique [0002] Since the outer cylindrical surface workpieces with a central angle of less than 180° cannot be directly clamped and added to the machine tool for machining the outer cylindrical surface, the current common method for machining the outer cylindrical surface of the outer cylindrical surface workpieces with a central angle of less than 180° is The material is cut into a large bar, first turned into a ring sleeve, and then the ring sleeve is milled and cut into multiple single pieces. However, this processing method has the following problems: 1. The ring sleeve greatly increases the size of the raw materials used, and the processing volume is large, resulting in waste of materials; 2. When the workpiece needs to be ground after harde...

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Problems solved by technology

However, this processing method has the following problems: 1. The ring sleeve greatly increases the size of the raw materials used, and the processing volume is large, resulting in waste of materials; 2. When the workpiece needs to be ground after hardening, it must be ground on the outer cylindrical surface. It can be cut into a single piece only after it is finished, and the cutting of a single piece after hardening needs to be done with a grinding wheel, which is low in efficiency and difficult

The use of special fixtures to position and clamp the workpiece can solve the problem of clamping the workpiece on the machine tool when it is lowered into a single piece of small material. However, when the diameters of the outer cylindrical surfaces of different batches of workpieces are different, different fixtures are required, and the workpiece’s Thickness cannot be fine-tuned

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