Novel three-point type bending machine hydraulic system with quick energy conservation

Abstract

The invention discloses a novel three-point type bending machine hydraulic system with quick energy conservation. One end of a first proportion speed control valve is connected with a first oil port of a first reversing valve; one end of a first energy storage control device is connected in parallel with a rodless cavity of a first main oil cylinder and is connected with the other end of the first proportion speed control valve; the other end of the first energy storage control device is connected in parallel with a rod cavity of the first main oil cylinder and is connected with a second oil port of the first reversing valve; the first energy storage control device is also communicated with an oil tank; one end of a second proportion speed control valve is connected with the first oil port of the first reversing valve; one end of a second energy storage control device is connected in parallel with a rodless cavity of a second main oil cylinder and is connected with the other end of the second proportion speed control valve; the other end of the second energy storage control device is connected with a rod cavity of the second main oil cylinder and is connected with the second oil port of the first reversing valve; the second energy storage control device is also communicated with the oil tank; and the first main oil cylinder and the second main oil cylinder are connected with an upper cutting board at the same time. The novel three-point type bending machine hydraulic system with quick energy conservation has the advantages of simpleness, reliability, quick energy conservation and large tonnage.

Description

technical field [0001] The invention relates to the technical field of sheet metal bending machines, in particular to a novel fast and energy-saving three-point bending machine hydraulic system. Background technique [0002] The bending process of ordinary bending machine is mainly: fast down-slow down-bending-fast back. When the slider moves down quickly, because the speed is high and the instantaneous flow is large, it is necessary to choose a high-power motor or adopt a speed-increasing cylinder structure, but these two methods are not economical. [0003] Most of the current bending machines in our country adopt the V-shaped mold hollow bending method. This method is to change the bending angle by controlling the depth of the upper knife entering the V-shaped groove. The main disadvantages are: (1) The bending angle is not accurate ; ⑵The sheet material rebounds greatly; ⑶The stability of batch processing bending is poor; Based on the shortcomings of V-shaped bending, t...

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Problems solved by technology

[0003] Most of the current bending machines in our country adopt the V-shaped mold hollow bending method. This method is to change the bending angle by controlling the depth of the upper knife entering the V-shaped groove. The main disadvantages are: (1) The bending angle is not accurate ; ⑵The sheet material rebounds greatly; ⑶The stability of batch processing bending is poor; Based on the shortcomings of V-shaped bending, three-point bending effectively solves these problems. It can adjust the height of the lower mold core through 3-point positioning. Realize the bending of different angles of the sheet metal, the sheet material springback is small, and the bending angle is accurate and controllable

[0005] As mentioned above, the foreign thr

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