A two-way variable blank-holder force deep-drawing hydraulic press and its application method

Abstract

A two-way variable blank-holding force deep-drawing hydraulic machine, including a main cylinder, a lower cylinder and a frame, the main cylinder is installed above the frame, and the lower cylinder is installed below the frame; the oil circuit of the main cylinder is installed with a master cylinder Proportional overflow valve, the oil circuit of the main cylinder is equipped with an independent compensation oil source, and the oil circuit of the lower cylinder is equipped with a proportional overflow valve of the lower cylinder; the proportional overflow valve of the main cylinder, the independent compensation oil source and the proportional overflow valve of the lower cylinder The signal acquisition terminal is connected to the signal output terminal of the controller; the proportional relief valve of the main cylinder and the proportional relief valve of the lower cylinder are both realized by the controller to adjust the pressure under the loading curve, and the independent compensation oil source is used to realize the pressure compensation of the main cylinder real-time, high-response effects. The present invention can realize the hydraulic pad deep drawing process, the lower cylinder reverse top drawing process mode and the corresponding continuous secondary drawing process action on the same hydraulic machine, and each corresponding deep drawing process mode can be loaded according to the preset loading curve Real-time adjustment of blank-holding force for sheet metal forming.

Description

technical field [0001] The invention relates to the technical field of hydraulic deep drawing, in particular to a two-way variable blank-holding force deep drawing hydraulic press and a use method thereof. Background technique [0002] Hydraulic deep drawing machines are widely used in the manufacturing industry, and are widely used in the manufacture of various metal barrel-shaped and pot-shaped parts. It is usually matched with a deep drawing die and formed through a deep drawing process. However, in the traditional deep drawing process, parts with a lower drawing coefficient require more times of drawing, which requires more hydraulic drawing machines. [0003] The general hydraulic deep drawing machine is composed of a main cylinder, a frame, a blank holder cylinder, a material return cylinder, a movable beam, a worktable, a thimble, a lower pallet, a lower cylinder and a hydraulic system. The deep drawing process is as follows: the main cylinder goes down quickly——the...

AI Technical Summary

Problems solved by technology

Every additional process requires an additional hydraulic deep drawing machine, each hydraulic deep drawing machine needs an action cycle, each hydraulic deep drawing machine needs a set of deep drawing dies, and each process requires manpower or Automatic pick-and-place mechanism and other equipment will increase the number of sets of equipment, occupy a lot of space and cost, and cannot effectively improve efficiency. The low efficiency and high cost of product forming pose severe challenges to the survival of enterprises.

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