Device and method for dynamically adjusting forming flow-resistance of drawing rib plate material
A technology of dynamic adjustment and flow resistance, applied in the field of stamping and forming, can solve the problems of inability to flexibly adjust the drawing resistance, the height of the drawing bead process is fixed, etc., to reduce the maximum thickness and thinning rate, improve the quality of deep drawing and uniformity shaping effect
Inactive Publication Date: 2018-01-26
HEFEI UNIV
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Problems solved by technology
[0007] In order to overcome the deficiencies of the prior art, the present invention provides a device for dynamically adjusting the flow resistance of drawbead sheet forming, which can reduce the probability of cracking and wrinkling of drawbeam blanks during the forming process, and solves the problem of traditional Drawing bead process height is fixed, can not flexibly adjust the shortcoming of tensile resistance, another purpose of the present invention is to provide related methods
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[0016] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0017] In describing the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientations or positional relationships indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention, rather than indicating or It should not be construed as limiting the invention by implying that a referenced device or element must have a particular orientation, be...
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The invention relates to the technical field of stamping forming, and particularly relates to a device and a method for dynamically adjusting forming flow-resistance of a drawing rib plate material. The device comprises a drawing rib die, wherein the drawing rib die is composed of a female die, a male die, a blank holder, a concave rib and a convex rib; a formed blank is placed between the femaledie and the male die; the convex rib is installed in a vertical sliding groove in the middle of the blank holder and is in sliding fit with the sliding groove, the bottom end of the convex rib is connected with the end part of a piston rod of a hydraulic cylinder fixed below the blank holder, and an oil inlet and an oil outlet of the hydraulic cylinder are communicates with an electro-hydraulic proportional control system; a feedback detection device is arranged on the outer side of the drawing rib die and is used for detecting the change value of the distance between the concave rib and the convex rib, and the feedback detection device is connected with a control end of the electro-hydraulic proportional control system. by adjusting the depth, pressed into the to-be-formed blank, of the convex rib, the forming flow-resistance of the blank can be adjusted so that the stress and the strain are uniformly distributed, and the uniform forming of the drawing plasticity of the blank can be realized.
Description
technical field [0001] The invention relates to the technical field of punching and forming, in particular to a device and a method for dynamically adjusting the flow resistance of drawing bead plate forming. Background technique [0002] In the stamping and forming of automobile panels, drawing beads are usually used to control the uneven sheet flow to reduce defects such as sheet wrinkling, cracks, surface distortion and springback. In the sheet metal deep drawing forming process, the drawbead and the blank holder force are connected together, and the blank holder force is used to generate frictional resistance, increase the tensile stress inside the sheet metal, control the flow of the material, and avoid material wrinkling . When greater restraint resistance is required to control metal flow, greater blankholder force must be applied. However, too high blank holder force will cause premature wear of the die and breakage of the sheet. Sometimes the minimum blank holder...
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IPC IPC(8): B21D22/22B21D37/10B21D53/88
Inventor 赵茂俞蒙争争
Owner HEFEI UNIV