High energy screw press

Abstract

The present invention is a quick pressure-relieving high-energy screw press for implementing die forging and finish forging process instead of friction press and hot die forging press. Said invented screw press is formed from machine body, motor, pulley, freewheel, screw rod, nut, slide block return system, clutch and its compression system, pressure-relieving system, hydraulic system and circuit system. The pressure-relieving system adopts electromagnetic hydraulic sensor, and the oil pressure in the compression cylinder can be increased with the increment of processing force, and when the oil pressure is reached to the electromagnetic current set value, the electromagnetic hydraulic sensor can act, and can utilize pilot valve and main valve to implement quick pressure relief, the lower cavity of piston is filled with low pressure oil with 0.2 MPa, and between the piston and friction disk and between driving shaft and screw rod the spherical pads are mounted.

Description

1. Technical field [0001] The invention belongs to heavy material processing equipment, and is a quick-release high-energy screw press used in die forging and precision forging processes instead of the currently widely used friction presses and hot die forging presses. 2. Background of the invention [0002] At present, the high-energy screw press used in the material processing industry is a product developed in Germany in the 1970s. This type of press is composed of a bed, a motor, a pulley, a flywheel, a clutch, a screw, a nut, a slider, a return cylinder, and a hydraulic system. It is disengaged from the screw to realize the termination strike and the return stroke of the slider. It eliminates the shortcomings of frequent starting of electric screw presses, short life of AC contactors caused by forward and reverse rotation, and large impact on grid power during operation. It does not need to be equipped with a huge hydraulic station like hydraulic screw presses. These ...

AI Technical Summary

Problems solved by technology

[0003] 1. The seal between the sealing ring 7 and the piston 3 is an end face seal, but the size of the two is large and the orientation is poor, so it is very difficult to ensure that all of them are in close contact

The gap between the inner diameter of the sealing ring and the support frame is difficult to control: if the gap is too large, a large amount of high-pressure oil in the auxiliary oil chamber will leak out, which will not only cause a large amount of energy loss, but also the pressure of the auxiliary oil chamber is too low to ensure the pressure of the end face seal. If the gap is too small, under the action of high-pressure oil, the sealing ring will cling to the support frame to generate a lot of friction. During the striking process, the piston will retreat upwards, and the sealing ring will not be able to keep up with it in time, resulting in sealing failure.

[0004] 2. The structure of the pressure relief system is too complicated

Each action takes a certain amount of time, and the pressure relief process is slow

[0005] 3. The pressure sensor needs to be equipped with a compressed air pump, an air storage tank, and a pressure regulating valve system, and the air pump is noisy

After the sensor is turned on, because the compressed air is not discharged immediately, it is prone to combo

[0006] 4. The slider balance cylinder consumes a lot of energy in the downstroke, and the flywheel decelerates significantly

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