Continuous drawing hydraulic machine and continuous drawing method

Abstract

The invention discloses a continuous drawing hydraulic machine and a continuous drawing method. The continuous drawing hydraulic machine comprises an upper fixed plate, a middle fixed plate, a lower fixed plate, guide posts, hydraulic cylinders and a drawing male mold, wherein the four guide posts and the three fixed plates are connected into a framework, a lower movable plate is arranged under the middle fixed plate, an upper movable plate and a middle movable plate are arranged above the middle fixed plate, the upper movable plate is positioned under the upper fixed plate, the upper movable plate, the middle movable plate and the lower movable plate vertically slide on the guide posts, a lower hydraulic cylinder is arranged under the lower movable plate, a piston rod of the lower hydraulic cylinder is connected with the lower movable plate, pressure maintaining hydraulic cylinders are arranged at two sides of the middle movable plate, piston rods of the pressure maintaining hydraulic cylinders are connected with the upper movable plate, an upper hydraulic cylinder is arranged on the upper fixed plate, and a piston rod of the upper hydraulic cylinder is connected with the upper movable plate. The continuous drawing hydraulic machine and the continuous drawing method have the advantages that the many times of drawing can be realized without taking out workpieces, the drawing efficiency is high, after the workpieces are drawn, the structure is stable, the thickness is consistent, and the damage cannot easily occur .

Description

technical field [0001] The invention relates to a hydraulic press, in particular to a continuous stretching hydraulic press and a continuous stretching method. Background technique [0002] The structure of the hydraulic press used for stretching is mainly composed of an upper fixed plate, a lower fixed plate, a movable plate, a blank holder, a main hydraulic cylinder, a blank blank hydraulic cylinder and a guide column. One stretch. If the workpiece needs to be stretched multiple times, only the workpiece is taken out and fed for the second stretch, and then taken out and fed for the third stretch. It is low and may damage the workpiece, and the feeding accuracy is difficult to grasp, and the phenomenon of pulling the workpiece is easy to occur. Contents of the invention [0003] The purpose of the present invention is to provide a continuous stretching hydraulic machine that realizes multiple stretching without taking out the workpiece, has high stretching efficiency, ...

AI Technical Summary

Problems solved by technology

If the workpiece needs to be stretched multiple times, only the workpiece is taken out and fed for the second stretch, and then taken out and fed for the third stretch. Low and may damage the workpiece, the accuracy of feeding is difficult to grasp, and the phenomenon of pulling the workpiece is easy to occur

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