Continuous hydraulic forming equipment and automatic control method thereof

Abstract

The invention discloses continuous hydraulic forming equipment and an automatic control method thereof. The equipment also comprises an electronic rule, a proximity switch and a proportion integration differentiation (PID) regulator besides an oil tank, an overflow valve, a one-way valve, a reversing valve, a one-way velocity regulating valve, an upper oil cylinder, a lower oil cylinder, an upper pressure rod and a lower pressure rod, wherein the sliding end of the electronic rule is connected with the fixed end of the upper pressure rod; and automatic change of the precession velocity of the upper pressure rod is realized by converting a resistance value at a corresponding position into a current signal, transmitting the current signal to the PID regulator, outputting current quantity to the upper pressure rod and the one-way velocity regulating valve by the PID regulator according to a preset upper pressure rod displacement-time curve, and regulating the opening degree of the valve. In addition, in the continuous hydraulic forming equipment, a programmable controller is used as a controller for the continuous operation of an overall forming process, so that the automatic continuous operation of the overall process including material filling, press forming, rough cast taking and the like is realized; therefore, the equipment is the hydraulic forming equipment which has a simple structure and high automation degree, and of which the precession velocity of the upper pressure rod is not required to be regulated manually.

Description

technical field [0001] The invention relates to the technical field of pressure forming equipment for forming materials through pressure, in particular to a continuous hydraulic forming equipment and its automatic control method, which is suitable for batch production and processing of powder, granule and block metal or inorganic non-metal products. Background technique [0002] The manufacturing process of metal or inorganic non-metal products usually includes powder making, molding, sintering, post-treatment, etc., among which the molding process is directly related to the appearance and performance of the final product, and is a key process of product manufacturing. The most commonly used molding equipment is various presses, which are mainly divided into two categories: mechanical presses and hydraulic presses according to the different ways of generating pressure. The mechanical press is driven by a crank connecting rod or toggle, cam, screw and other mechanisms to gene...

AI Technical Summary

Problems solved by technology

[0009] However, the existing automatic hydraulic presses require special products for certain processes, such as the need to process special-shaped copper or aluminum alloys, and there are certain difficulties.

One is that the pressing speed cannot be adjusted automatically, and it is difficult to process products with changing cross-sections. The opening of the oil valve can only be adjusted manually, that is, the larger the opening of the valve, the higher the pressing speed, but in a pressing process, the pressing speed can only be controlled by a fixed value.

Therefore, when different pressing speeds are required in the pressing process, the only way to stop halfway and manually adjust the opening of the oil valve before pressing is to make the whole operation process very cumbersome.

[0010] In addition, the existing automatic hydraulic presses or mechanical presses all adopt the feeding method of hopper vibration, balance weighing, and feeding. This feeding method has a certain effect on granular powder molding, but for Larger and irregularly shaped block materials are likely to cause the material to get stuck at the mouth of the hopper and cannot fall

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