Production method of maintenance-free joint shell

Abstract

The invention discloses a production method of a maintenance-free joint shell, and is used for producing a ball joint shell with a ball socket which is applied to a steering pull rod of an automobile.The production method comprises the following steps of step 1, blanking; step 2, heating; step 3, forging and forming; step 4, normalizing; step 5, performing rough machining; step 6, tempering; step7, semi-finish turning; step 8, high-frequency quenching; step 9, low-temperature tempering; and step 10, swinging and grinding. According to the production method of the maintenance-free joint shell, an inner ball finish turning in the original process is changed into swing grinding, the ball joint shell is installed on a special tool, swinging and rotating at the same time, and the height of the center of a swinging shaft and the sphere center of the ball joint shell are kept consistent; a ball cubic boron nitride grinding wheel is used for grinding, and crossed meshes are formed on the ball surface; the functions of collecting, eliminating abrasion chippings and self-lubricating are achieved, production quality is stable, damage is not easy caused, maintenance is not needed, and the mechanical performance after final assembly is good; and meanwhile, the production process has the advantages of being high in production efficiency, free of the grinding wheel maintenance and saving incost.

Description

technical field [0001] The invention relates to the technical field of production and processing methods of automobile steering system parts, in particular to a production method of a maintenance-free joint housing. Background technique [0002] The steering tie rod is an important part of the steering mechanism of the car. It directly affects the stability of the car's handling, the safety of the operation and the service life of the tires. The ball joint assembly at both ends of the tie rod, the manufacturing accuracy and the tolerance of shape and position directly affect the various parts of the tie rod. Function, the ball joint assembly is composed of ball joint shell, ball stud pin, spring gland, dust cover and other parts. [0003] In the existing processing technology, the ball joint shell is generally produced through the process of blanking-heating-forging-forming-normalizing-rough machining-quenching-tempering-semi-finishing-high-frequency quenching-low temperatur...

AI Technical Summary

Problems solved by technology

Since the quenching hardness of the inner spherical surface reaches HRC55-58, the hardness is relatively high. In the process of finishing the inner spherical surface, a high-hardness turning tool is used for turning. The tool wears a lot, and the blade needs to be changed frequently. In addition, it is affected by the arc of the tool tip. It is difficult to guarantee the contour accuracy of the products produced by the car. The axial displacement and rotational torque of the steering assembly after the assembly of this type of ball joint shell are very different, and the quality is unstable. The performance of the ball joint shell has not been able to meet the expected requirements. After long-term use, the degree of defect amplification is faster