Broaching and drilling process for front brake adjustment arm casting

Abstract

The invention discloses a broaching and drilling process for a front brake adjustment arm casting. The broaching and drilling process for the front brake adjustment arm casting is mainly composed of following steps: (1) firstly, using a drill head of phi60mm to broach a hole of the casting: assigning actual feed rate f to be 1.09mm / r by multiplying feed rate by a coefficient of 0.75 due to the fact that the hole of the casting is a low rigidity part; assigning rotation speed to be 64r / min according to performance of a machine tool, and therefore obtaining actual cutting speed of 12.1m / min; (2) processing a hole of phi62.5mm by using a shell core drill: settling actual rotation speed to be 23.6m / min when spindle speed n of the machine toll is 122r / min; (3) performing fine broaching and performing detection. The broaching and drilling process for the front brake adjustment arm casting has the advantages that the casing produced by using the broaching and drilling process can improve a braking stability degree, can improve tensile strength, can bear vibration or impacting, and is suitable for mass production, low in cost, and conveniently modified according to different vehicle models.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a process for expanding and drilling a front brake adjusting arm casting. Background technique [0002] With the advancement of technology, the car's front brake adjustment arm shell is playing an increasingly important role. Its main function is to support and protect the front brake adjustment arm. Its center is a spline hole, and the outside is worm gear teeth. , There is a worm shaft on the side, a square on the head, for adjusting the brake, and a hole on the outermost side, where the pin is connected to the brake cylinder, and the hole and keyway cooperate with the shaft to transmit torque to adjust the brake. The castings are used to support and protect the front brake adjusting arm, and also transmit torque, so there is a certain strength requirement for the parts, which should have a certain tensile strength and can withstand vibration or impact. If these castings ar...

AI Technical Summary

Problems solved by technology

[0003] Therefore, there are certain disadvantages in the processing of the castings of the front brake adjusting arm, especially in the drilling process of the castings. Therefore, in view of the above aspects, it is necessary to make effective innovations.