Multiclamp type stretch forming machine

Abstract

The invention discloses a multiclamp type stretch forming machine and relates to plastic processing equipment for curve forming of plates, belonging to the field of mechanical engineering. The machine mainly comprises clamping mechanisms (1), a stretching mechanism (2) and a stand (3), wherein a row of clamping mechanisms (1) are respectively distributed at both sides of the stand (3); each clamping mechanisms (1) is provided with a lower connecting hole (4) and a rear connecting hole (5); and all the connecting holes are respectively connected with the stretching mechanism (2) by pin shafts or cardan joints. The machine can realize the flexible control of a plurality of clamps, ensure that a workpiece is more easily attached to a die in the stretching process, obviously improve the material utilization ratio of the workpiece and obtain higher workpiece forming effect.

Description

technical field [0001] The multi-clamp stretch forming machine of the present invention relates to a plastic processing device for forming curved surfaces of plate parts, belonging to the field of mechanical engineering. Background technique [0002] When the traditional stretch forming machine draws the workpiece, generally only one to two hydraulic cylinders are used to generate the stretching action, and the plate at the jaws basically moves along the transverse direction; when forming a workpiece with a large transverse curvature, the transverse tensile stress of the plate and The distribution of tensile strain is obviously uneven, and it is easy to produce forming defects such as non-mold, cracking 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 decrea...

AI Technical Summary

Problems solved by technology

[0002] When the traditional stretch forming machine draws the workpiece, generally only one to two hydraulic cylinders are used to generate the stretching action, and the plate at the jaws basically moves along the transverse direction; when forming a workpiece with a large transverse curvature, the transverse tensile stress of the plate and The distribution of tensile strain is obviously uneven, and it is easy to produce forming defects such as non-mold, cracking 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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