Shock Absorber Internal Shaft Forming Process and Its Die Group

Abstract

The invention relates to the technical field of automobile shock absorber manufacturing, and in particular to a shock absorber internal shaft molding process. The process comprises the following steps: in the first step, shaping, placing a cut cylindrical wire into a first mold, flattening the top of the cylindrical wire and pressing the bottom into a first chamfer (A); in the second step, stretching the bottom out of a lower flat shaft; in the third step, shaping the upper end of a stepped shaft, placing the workpiece obtained in the second step into a third mold, and squeezing the stepped shaft into a second chamfer (C); in the fourth step, stretching the upper end of the stepped shaft; in the fifth step, applying a flange beforehand; in the sixth step, pressing the flange; and in the seventh step, pressing connection holes, taking out the molded workpiece, and punching two connection holes in the upper flat shaft and the lower flat shaft with a punching machine respectively. The whole process has a reasonable design and higher machining precision, transfer between each set of molds is realized by means of a manipulator, the working efficiency is improved, the cost of raw materials is greatly reduced due to just wasting scraps in the punching position, and the output and quality are improved.

Description

technical field [0001] The invention relates to the technical field of automobile shock absorber manufacturing, in particular to a forming process for the inner shaft of the shock absorber and a mold set thereof. Background technique [0002] In the suspension system, due to the shock of the elastic element, the shock absorber is installed in parallel with the elastic element in order to improve the ride comfort of the car. In order to attenuate the vibration, the shock absorber used in the automobile suspension system is mostly hydraulic The working principle of the shock absorber is that when the frame (or body) and the axle vibrate and there is relative movement, the piston in the shock absorber moves up and down, and the oil in the shock absorber chamber repeatedly passes through different chambers from one chamber to the other. The pores flow into another cavity. At this time, the friction between the hole wall and the oil and the internal friction between the oil mole...

AI Technical Summary

Problems solved by technology

At present, the internal shaft of the shock absorber is mainly processed by using lathes, milling machines, drilling machines, grinding, polishing and other machine tools. Since the flange of the internal shaft of the shock absorber is much larger than the diameter of the two flat shafts, the transmission method is adopted. Machining requires a considerable waste of materials, the proportion of processing loss materials is more than double that of the product, the processing cost is more than high, the output is 99% lower, the size and brightness are unstable, the difference is large, and the scrap rate is more than 5%.

Another method is through die-casting, drilling, grinding, polishing and other processing procedures. The processing hours are high, the processing cost is more than 120%, the processing material cost is 163.6%, the output is more than 60%, and the scrap rate is more than 1%.

The above two processing procedures have shortcomings such as size, concentricity, parallelism, brightness and chamfering, and high cost, which affect the quality and output of the product.

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