Machining technology for inner end surfaces of lugs of automobile steering knuckle

Abstract

The invention relates to the technical field of automobile steering knuckles, and in particular relates to a machining technology for the inner end surfaces of lugs of an automobile steering knuckle. The machining technology comprises the following steps: fixing the steering knuckle on a numerically-controlled machine tool through a clamp, machining a rod part, and rotating the clamp so as to rotate the steering knuckle for a certain angle, wherein the rotated angle is an included angle between the central lines of the steering knuckle rod part and each master pin hole; and roughly milling the inner end surfaces of an upper lug and a lower lug along a direction vertical to the central line of each master pin hole by using a rough milling cutter, and reversely finish-milling the inner end surface of the upper lug through a finish-milling cutter after penetrating through the master pin hole in the upper lug. According to the machining technology disclosed by the invention, when the inner end surfaces of the lugs are machined, the finish-milling cutter is used for finish-milling the inner end surfaces of the lugs after penetrating through the master pin holes so as to well guarantee the perpendicularity of the master pin holes and the inner end surfaces and the distance between the inner end surface of the upper lug and the inner end surface of the lower lug, and the yield of the product is improved.

Description

technical field [0001] The invention relates to the technical field of automobile steering knuckles, in particular to a process for processing the inner end surface of an automobile steering knuckle ear. Background technique [0002] The steering knuckle is one of the main parts on the steering axle of the car, which can make the car run stably and transmit the driving direction sensitively. The function of the steering knuckle is to bear the load on the front of the car, support and drive the front wheel to rotate around the kingpin to turn the car, so , requiring high strength and processing precision. [0003] The steering knuckle consists of a rod, a flange and a fork. The upper and lower ears of the fork are provided with coaxial kingpin holes, which are connected to the fist of the front axle through the kingpin. The connection between the lower ear and the fist of the front axle is Roller thrust bearings are installed between them, and adjusting gaskets are installed...

AI Technical Summary

Problems solved by technology

Especially, because the distance between the upper ear and the lower ear is small, and the upper ear and the lower ear protrude outward, the milling cutter is easy to interfere with the ear (upper ear, lower ear), and the existing technology is difficult to process the inner end surface , it is difficult to ensure the size of the inner end face and the perpendicularity between the king pin hole and the inner end face

[0004] For example, the Chinese invention patent application with the application number 201010135933.3 discloses "a fine boring and milling combined machine tool for processing automobile steering knuckles", which uses two horizontal boring heads to add kingpin holes, and vertical milling On the one hand, in order to make the milling head penetrate between the upper ear and the lower ear, its size is small, resulting in poor strength, and the length of the milling head is long, resulting in milling the inner end face, The milling head is prone to bending, it is difficult to ensure the perpendicularity between the kingpin hole and the inner end surface, and it is also difficult to ensure the distance between the inner end surface of the upper ear and the inner end surface of the lower ear

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