Oil channel structure of cold bending machine for forming three-dimensional curved surface plate material and method for pressing plate material

Abstract

The invention discloses an oil channel structure of a cold bending machine for a three-dimensional curved surface plate material and a method for pressing the plate material, and particularly discloses the oil channel structure of the cold bending machine for forming the three-dimensional curved surface plate material. The oil channel structure includes a hydraulic cylinder connected with indenters of an upper die / a lower die of the cold bending machine, and the upper die / the lower die of the cold bending machine is provided with M * N indenters. The oil channel structure is characterized in that the indenters are divided into a left area and a right area from the center of the die by indenter array corresponding to the upper die / the lower die of the cold bending machine; the indenters ofeach area are correspondingly arranged an independent oil channel according to a line or a column of the indenter array; each oil channel is in communication with a hydraulic cylinder, and the hydraulic cylinder is correspondingly connected with each indenter in the corresponding line or column of the area; the setting mode of the oil channel in the left area is the same as the setting mode of theoil channel in the right area; and the oil supply of each oil channel is controlled separately. The indenters of the dies are partitioned and controlled, and machining of plates with large twist andlongitudinal curvature can be realized.

Description

technical field [0001] The invention relates to an improvement of an oil channel structure for forming a three-dimensional curved plate cold bending machine, and belongs to the technical field of three-dimensional curved plate processing equipment. The invention also relates to a method for pressing a plate with large twist and longitudinal camber by using the three-dimensional curved plate cold bender with the above-mentioned oil channel structure. Background technique [0002] In the hull, the hull outer plate member is an important component, and the hull outer plate member is mostly in a curved shape. Usually, a three-dimensional curved plate cold bender is used to form the hull outer plate member at room temperature. In the prior art, the three-dimensional curved plate cold bending machine adopting the multi-pressure head and multi-point plate forming technology has great processing advantages for the hull plate members with complex shapes, large scales and small curvat...

AI Technical Summary

Problems solved by technology

The cold bending machine with this kind of oil channel arrangement has great defects when pressing the plate with large twist and longitudinal camber. Due to the limited stroke of the hydraulic cylinder driving the pressure head, when the plate to be processed has high twist and longitudinal camber When it is too large, the plate depth required by the design cannot be reached when the indenter presses down, and the plate cannot be effectively pressed. It is difficult to achieve high-precision pressing, which may easily lead to unqualified products

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