Fast return punching buffer device and hydraulic press for punching and blanking

A cushioning device and blanking technology, applied in metal processing equipment, safety equipment, manufacturing tools, etc., can solve the problems of low working efficiency of hydraulic press, slow down speed of main oil cylinder, slow return speed of main oil cylinder and buffer cylinder, etc., to achieve Reduced idle travel time, small body vibration, and good cushioning effect

Active Publication Date: 2016-06-01
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a problem that the down speed of the main oil cylinder is slow, and the return speed of the main oil cylinder and the buffer cylinder is slow, resulting in low working efficiency of the hydraulic press

Method used

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  • Fast return punching buffer device and hydraulic press for punching and blanking

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0016] Such as figure 1 As shown, in the idle stroke when the piston rod of the main cylinder 1 moves downward, the main oil circuit fills the chamber I of the main oil cylinder 1 with oil to make it go down quickly. Cavities Ⅰ and Ⅱ are filled with oil at the same time to provide sufficient punching force; when the slider 2 reaches the punching buffer point, the two-position two-way electromagnetic reversing valve 15 is energized, and the punching pressure signal p passes through the two-position two-way electromagnetic The reversing valve 15 and the two-position two-way solenoid valve 8 enter the I and II cavities of the buffer cylinder 4 so that the buffer cylinder 4 quickly builds up a sufficiently large buffer force and acts on the slider 2. At the same time, the I and II cavities of the buffer cylinder 4 The oil is discharged into the oil tank after passing through the ports a and c of the adjustable throttle valve 12 and the two-way cartridge valve 11, and the adjustabl...

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PUM

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Abstract

The invention discloses a fast return punching buffer device and a hydraulic press for punching and blanking. The device includes a main oil cylinder, a buffer cylinder, a pressure regulating and unloading control block, and a return control valve. Both the main oil cylinder and the buffer cylinder are speed-increasing cylinders. During the idle stroke of the main oil cylinder before punching, the oil circuit fills the chamber II of the main oil cylinder with oil to make it go down quickly. The control block establishes an appropriate buffer force to provide an effective support for the slider. After buffering, the return control valve supplies oil to the chamber III of the main cylinder and the chamber II of the buffer cylinder to quickly return to reset. The invention has the advantages of increasing the descending speed of the main oil cylinder and the return speed of the main oil cylinder and buffer cylinder, improving work efficiency, good buffer effect, small vibration of the press, and low noise.

Description

technical field [0001] The invention relates to a buffer hydraulic system for a hydraulic machine, in particular to a fast return punching buffer device, which is suitable for a hydraulic machine for punching and blanking. Background technique [0002] When the hydraulic press is performing blanking operations, the press suddenly loses load at the moment the sheet breaks, and the hydraulic compression energy in the oil cylinder and the elastic deformation energy of the fuselage are released rapidly, resulting in strong bounce, impact and vibration of the hydraulic press, and a large noise. It not only deteriorates the working environment, but also causes damage to equipment and molds, and easily damages hydraulic valves, seriously affecting the accuracy and service life of equipment. [0003] Therefore, if the hydraulic press wants to carry out the blanking operation, it is generally necessary to be equipped with a blanking buffer device. Most of the existing punching buffe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D28/02B21D55/00
CPCB21D28/02B21D55/00
Inventor 冯毅雄翟星高一聪
Owner ZHEJIANG UNIV
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