Milling equipment for intermediate stroke grooves of pistons of brake pumps

Abstract

The invention relates to milling equipment for intermediate stroke grooves of pistons of brake pumps. The milling equipment comprises a framework, a fixture and a machining power head, the machining power head consists of a milling head and a drilling head which can be switched to a machining position, the fixture is arranged on a base and can move up and down on the base, the movement distance of the fixture is equal to the length of a stroke groove to be machined, the machining power head is disposed on one side of the fixture, and an apex device is disposed on the other side of the fixture. When a milling cutter on the milling head is located at the machining position, an apex on the apex device and the milling cutter are concentric, and the apex can be abutted to the central point of the end of the milling cutter. By the aid of the apex device, the apex is abutted to the central point of the end of the milling cutter during milling machining, a suspended free end of the milling cutter is radially supported, accordingly, the quantity of radial swinging of the milling cutter which rotates at high speed is reduced, and shape precision and surface smoothness of the machined groove are greatly improved. Under the condition that identical machining precision is obtained, the milling equipment with the structure can greatly reduce process cost as compared with a conventional independent finish machining mode.

Description

technical field [0001] The invention relates to a combined processing device, in particular to a milling device for a middle stroke groove of a brake pump piston. Background technique [0002] For some vehicle brake pumps, the body of the piston is cylindrical (some of them are stepped), and the middle stroke groove is arranged axially on the circumference. The middle stroke groove is a strip groove and runs through the body; the middle stroke groove Cooperate with the pin on the valve body to guide and control the moving stroke of the piston. In order to process the middle stroke groove, the machining method of milling is generally adopted, but because the middle stroke groove is a through groove that penetrates the piston body in the radial direction and is relatively deep, it is difficult to process, and the machining accuracy is low. The piston does not move smoothly enough, which affects the performance of the brake pump. Contents of the invention [0003] The main ...

AI Technical Summary

Problems solved by technology

In order to process the middle stroke groove, the machining method of milling is generally adopted, but because the middle stroke groove is a through groove that penetrates the piston body in the radial direction and is relatively deep, it is difficult to process, and the machining accuracy is low. The piston movement is not smooth enough, so that the performance of the brake pump is affected

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