Servo pump controlled hydraulic fine blanking machine and hydraulic machining method

Abstract

The invention relates to a servo pump controlled hydraulic fine blanking machine and a hydraulic machining method. A male die is fixed to the bottom of a sliding block, and the periphery of the male die is nested in a pressing ring; the top of the pressing ring is connected to an upper hydraulic cushion through a driving rod, and the center of the upper hydraulic cushion is fixedly connected withthe lower end of a plunger rod of an edge pressing cylinder; the edge pressing cylinder is fixed into the sliding block; a female die matched with the pressing ring is fixed to a worktable, and a piece jacking device matched with the male die is nested in the center of the female die; the lower end of the piece jacking device is connected to a lower hydraulic cushion through a piece jacking devicedriving rod, and the center of the lower hydraulic cushion is fixedly connected with the top of a plunger rod of a back pressure cylinder; and the back pressure cylinder is fixed to the center of thebottom of the worktable. Hydraulic machining comprises the following actions: a material is sent into the male die and the female die, the edge pressing cylinder and the back pressure cylinder are jacked out, the sliding block quickly descends till the dies are assembled, the sliding block slowly descends for blanking, the pressure is released, the sliding block returns, the dies are disassembled, the edge pressing cylinder downwards pushes the material, the back pressure cylinder upwards pushes a blanking piece, the material is sent into the blanking piece, and waste in the blanking piece isblown off and cleared. The servo pump controlled hydraulic fine blanking machine is high in shearing precision and good in product quality.

Description

technical field [0001] The invention relates to a hydraulic fine blanking machine, in particular to a servo pump-controlled hydraulic fine blanking machine. The invention also relates to a hydraulic processing method for a servo pump-controlled hydraulic fine blanking machine, which belongs to the technical field of fine blanking machine tools. Background technique [0002] The hydraulic press is a device that uses hydraulic transmission technology for pressure processing. In addition to the pressure and speed that can be adjusted steplessly within a wide range, it can also output all power or maintain the required pressure at any position. Compared with mechanical presses, it is more efficient. It is suitable for sheet metal bending, flanging, fine blanking, cold extrusion of metal parts and precision press-fitting of parts, etc. Fine blanking is developed on the basis of general punching. It originated from fine blanking. Now it has developed into an efficient and economic...

AI Technical Summary

Problems solved by technology

The down-moving hydraulic press usually uses a three-phase asynchronous motor to drive a constant power variable pump combined with a servo valve to realize the adjustment of pressure, stroke, and speed. The output displacement of the oil pump remains unchanged, and it is only adjusted by the opening size of the servo valve, and there is a large amount of oil. Overflow, easy to cause pipeline leakage and oil temperature rise

Moreover, the manufacturing process of the down-moving hydraulic press is relatively complicated. If it is necessary to realize the production method of one mold and two pieces, the amount of modification will be relatively large, resulting in a higher price. Although the performance is superior, the popularity rate of use is low.

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