Cold-working boring and milling composite technology for automobile front axle

Abstract

The invention relates to a kind of cold boring and milling technique to process the foreside axis of the car. The main technique is: locate the two spring steel seats, drill ten holes in each steel board, and drill the holes again with U drilling technology to finish the primary process. Fine the holes and corner, the upper and the under board faces with the boring bed. Only one setting and clumping step is needed to finish the holes process. The invention overcomes the excursion phenomenon by combining the boring and milling technology with three work position machine bed to take the drill-bore-drill-hinge procedure. It limits the warp between the chief pin hole and the locking pin hole. The technology is simple and has high processing precision. So the product is high quality, and needs few device and cost. The production efficiency is high and the work steam intensity between the procedures is low. In addition, it can make sure clean working circumstance.

Description

technical field [0001] The invention belongs to the field of mechanical processing, and relates to a processing technology of an automobile front axle, in particular to a cold working boring and milling composite technology of an automobile front axle. Background technique [0002] At present, the domestic automobile front axle cold processing process mainly has the following types: [0003] 1. ① Milling the plane of two leaf spring seats; ② Drilling ten holes in the plane of two leaf spring seats; ③ Rough milling of the upper and lower end faces of the two kingpin holes; ④ Fine milling of the upper and lower end faces of the kingpin holes; ⑤ Drilling and reaming of the kingpin holes; Kingpin hole; ⑦ Countersinking the upper and lower end faces of the kingpin hole; ⑧ Drilling the hinge pin hole; [0004] 2. ①Milling the plane of the two leaf spring seats; ②Drilling ten holes in the plane of the two leaf spring seats; ③Drilling the hinge pin holes; ④Rough milling of the uppe...

AI Technical Summary

Problems solved by technology

[0007] In the first process, 1. The kingpin hole is used for positioning, and the upper and lower end faces are countersinked. It is difficult to ensure the perpendicularity between the end face and the king pin hole, and the height of the king pin hole is not easy to ensure; 2. The king pin hole is positioned to drill the lock pin hole, and the drill bit When passing through the cross-intersecting hole, it is easy to appear unilateral cutting phenomenon and offset, which makes it difficult to guarantee the center distance between the king pin hole and the lock pin hole;

[0008] In the second process, 1. Because the process method is to drill the lock pin hole first and then the kingpin hole, and the hole diameter and position of the kingpin hole are the key dimensions, the precision of the kingpin hole diameter is not easy to guarantee; After milling the upper and lower end faces of the king pin hole, the king pin hole is processed, and the verticality of the end face relative to the king pin hole is difficult to guarantee;

[0009] In the third process, 1. It is not easy to guarantee the dimensional tolerance of the king pin hole and the lock pin hole cross hole ±0.1; 2. It is not easy to guarantee the dimensional tolerance of the king pin hole by reaming; 3. After finishing milling the upper and lower sides of the king pin hole It is difficult to guarantee the perpendicularity between the king pin hole and the upper and lower end faces on the end face; 4. It is not easy to guarantee the length of the king pin hole

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