A production process and application of a square step adjusting bolt

Abstract

The invention relates to the field of machining, and discloses a production process of a square step adjusting bolt. The production process comprises the following steps that 1, a blank is cut out; 2,forward extrusion is carried out on a strong beam rod part and a tail part to pre-form chamfer; 3, head upsetting pre-forming and tail end fine rod forming are carried out; 4, the head is pre-formed;5, a square step is cut; 6, CNC trimming is carried out, and burrs are removed; and 7, straightening and grinding are carried out on the thread after tempering. According to the production process, the defects that the material utilization rate is low, it is hard for the size to meet the adjusting requirement of a steering system, and the capacity cannot meet the market demand in the case of thetraditional processing method are overcome; the characteristics of the cold heading cold extruding technology are fully utilized, automatic production of the production process and the manufacturing of the square step adjusting bolt is realized, and the square step adjusting bolt is characterized in that a square step is required to be smooth and free of a notch, and lower supporting surface is required to be smooth, flat, and free of burrs; and form and location tolerance requirements such as the vertical degree of the lower supporting surface and the rod part, rod part run-out degree and thesquare step symmetry degree are high.

Description

Technical field [0001] The invention relates to the field of mechanical processing, in particular to a production process and application of a square step adjusting bolt. Background technique [0002] The car steering system is a series of devices used to change or maintain the driving direction of the car. Its function is to control the driving direction of the car according to the driver's wishes. Automobile steering system is one of the most basic systems of automobiles, and its reliability and convenience are essential to ensure the safety of automobiles. The square step adjustment bolt is the most important adjustment bolt in the steering system. At present, the square step in the market is generally manufactured by milling, cold extrusion and other methods. The process is complicated, the production efficiency is low, the material cost is high, and the processing cost is high. And after the product is used, the market feedbacks that there is abnormal noise when the car tur...

AI Technical Summary

Problems solved by technology

The square step adjustment bolt is the most important adjustment bolt in the steering system. At present, the square steps in the market are generally produced by milling, cold extrusion and other methods. The process is complicated, the production efficiency is low, the material cost is high, and the processing cost is high.

And after the products produced are used, the market reports that there are abnormal noises when the car turns

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