Reciprocating series hydraulic drawing machine

Abstract

The invention discloses a reciprocating-moving-type hydraulic drawbench, which solves the problems that an existing device cannot directly draw long workpieces, the drawbench is high in cost, and the machine body is long. The reciprocating-moving-type hydraulic drawbench is characterized by also comprising a left driving oil cylinder, a right driving oil cylinder and a draw bar, wherein the left driving oil cylinder and the right driving oil cylinder are arranged on a front part machine body; the draw bar is provided with a positioning groove; the outer end parts of piston rods of the driving oil cylinders are connected with a stress beam; the middle part of the stress beam is provided with an electromagnetic positioning card, and the electromagnetic positioning card clamps the draw rod by the positioning groove; the other end of the draw bar is connected with a hydraulic fixture for clamping workpieces. According to the invention, hydraulic force of piston cavities of two parallel hydraulic driving oil cylinders is taken as a power source, the requirement for cylinder diameter is lowered, and the idle stroke and return stroke are rapid; the strokes of the driving oil cylinders are related to the one-time moving distance, and the same workpiece can be subjected to reciprocating-moving-type drawing for multiple times, so that workpieces with any length can be drawn by driving oil cylinders with short cylinder diameter and strokes; only a mold holder is required; the machine body is very short; the manufacturing cost is low.

Description

technical field [0001] The invention relates to a hydraulic drawing machine, more specifically to a hydraulic drawing machine which can be used in reciprocating serial motion. Background technique [0002] The hydraulic cold drawing machine is to make the workpiece (material) to be processed through forced cold deformation through the mold, so as to meet the requirements of shape, size, surface quality and strength, and efficiently realize the purpose of chipless processing. The traditional hydraulic cold drawing machine has the following problems: 1. The length of the drawn workpiece is restricted by the stroke of the traction hydraulic cylinder. If it is too long, it cannot be drawn directly, and it needs to be drawn in sections, which is not only labor-intensive and time-consuming, but also reduces the material utilization rate. . If you want to elongate the workpiece, you need to lengthen the stroke of the traction hydraulic cylinder and the length of the fuselage simul...

AI Technical Summary

Problems solved by technology

The traditional hydraulic cold drawing machine has the following problems: 1. The length of the drawn workpiece is restricted by the stroke of the traction hydraulic cylinder. If it is too long, it cannot be drawn directly, and it needs to be drawn in sections, which is not only labor-intensive and time-consuming, but also reduces the material utilization rate.

If you want to elongate the workpiece, you must simultaneously lengthen the stroke of the traction hydraulic cylinder and the length of the fuselage, etc., the cost is too high

2. The cost of the hydraulic drawing machine is high, the bore of the traction cylinder is relatively large (the diameter is generally above φ400mm), and the stroke is generally more than 10 meters. Such a hydraulic cylinder is expensive, and there are three large seat plates and 8 supports Pipes, tie rods, fuselage, etc. generally cost more than 2 million yuan, some even higher, and some even as high as tens of millions.

3. Occupies a large number of workshops, and the body is long. Calculated by drawing a workpiece of 10 meters, the total length of a general drawing machine is about 50 meters.

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