Cold extruding and forming process of lower oil cylinder of manual porter

Abstract

The invention discloses a cold extruding and forming process of a lower oil cylinder of a manual porter, comprising the phosphatizing process and cold extruding process. In the cold extruding process, the one-time blank extruding and forming permissibility should be 60 percent less than the finished lower oil cylinder deformation limit value, and the blank can be gradually formed into the lower oil cylinder after being extruded twice or more. The blank is backward extruded into a cup shape with the plastic flow being opposite to the pressurizing direction of the blank, and then the blank is forward extruded to be formed with the plastic flow being same to the pressurizing direction of the blank; the blank should be phosphatized before being extruded backward and forward. The cold extruding and forming process of the lower oil cylinder of the manual porter solves the problems that the prior total cutting, processing and forming process of the same is a waste of labor, time and material, cannot ensure the consistent quality of the lower coil cylinder, and the like, and the cold extruding and forming process saves time, labor and material and ensure consistent quality of the lower coil cylinder.

Description

technical field [0001] The invention relates to a processing and forming process of an oil cylinder, in particular to a cold extrusion forming process for a lower oil cylinder of a manual transport vehicle applied to hydraulic components of a manual transport vehicle. Background technique [0002] Refer to the oil cylinder under the manual pallet truck Figure 4 , which is a cylindrical steel part with one end open and the other end closed, a cylindrical thick-walled cup tubular steel part. The processing and forming process of the prior art is a metal cutting process. Because the metal cutting process must cut off a large amount of metal, it is too wasteful of materials. The material utilization rate is low, such as Figure 4 The central blind hole 01 in the center; at the same time, from blanking to forming a bar round steel, it must go through more than ten processes of sawing, drilling, turning, hooking, boring, reaming and grinding, which is labor-intensive and time-cons...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problems and deficiencies of the processing methods of the above-mentioned prior art, such as labor-intensive, time-consuming, material-consuming, poor quality consistency, etc., and adopts a cold extrusion molding process to replace the multiple metal cutting processes in the above-mentioned prior art The technical scheme of blind hole, outer circle and step part forming can only be completed, and a cold extrusion molding process for the lower cylinder of the manual truck is provided, aiming at saving labor, time and material in the processing and molding of the lower cylinder of the manual truck Highly consistent with the purpose of product quality

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