Material clamping block for multi-clamp type stretch forming machine

Abstract

The invention discloses a material clamping block for a multi-clamp type stretch forming machine, relating to a plastic processing device for curve surface forming of sheet parts and belonging to the field of mechanical engineering. The material clamping block comprises two rows of multiple pairs, and the two rows are respectively arranged on the left side and the right side of the stretch forming machine. A gap is reserved between two adjacent material clamping blocks, a chine line and two angles on the front end of the material clamping face of each material clamping block are large rounded corners, and chine lines on the left end and the right end of the material clamping surface adjacent to other material clamping blocks are also provided with round corners. The design allows each material clamping block and a material clamping mechanism to passively produce unequal rotation, swinging or stretching to form arc or waveform linear parallelism, and the flexible control of multiple clamps of the stretch forming machine is realized; and the invention is beneficial to a workpiece to snuggle to a mold during stretching, the material utilization rate of the workpiece is obviously increased, and the stretching forming of a complex workpiece is realized.

Description

technical field [0001] The clamping block for a multi-clamp stretch forming machine of the present invention relates to plastic processing equipment for forming curved surfaces of plate parts, and belongs to the field of mechanical engineering. Background technique [0002] When the traditional stretch forming machine draws the workpiece, the plate at the jaw basically moves along the horizontal direction; when forming a workpiece with a large transverse curvature, the distribution of tensile stress and tensile strain in the transverse direction of the plate is obviously uneven, which is easy to cause non-fitting, Forming defects such as tearing or wrinkling. In order to prevent these defects, the control accuracy of the equipment is very high, the design of the control system is complicated, and the equipment is expensive; moreover, the blanks for drawing often require a large process margin, which leads to a decrease in the utilization rate of materials. Contents of the ...

AI Technical Summary

Problems solved by technology

[0002] When the traditional stretch forming machine draws the workpiece, the plate at the jaws basically moves along the horizontal direction; when forming a workpiece with a large transverse curvature, the distribution of tensile stress and strain in the transverse direction of the plate is obviously uneven, which is easy to cause non-fitting, Forming defects such as tearing or wrinkling

In order to prevent these defects, the control accuracy of the equipment is very high, the design of the control system is complicated, and the equipment is expensive; moreover, the blanks for drawing often require a large process margin, which leads to a reduction in the utilization rate of materials

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