Multi-point loading control curved surface stretch forming device

Abstract

The invention provides a multi-point loading control curved surface stretch forming device. The device is mainly composed of a machine body framework, a mold installing base, a loading control unit set and a loading control auxiliary mechanism, wherein the loading control unit set and the loading control auxiliary mechanism are distributed on the two sides of the mold installing base; the loading control unit set is composed of a plurality of loading control units; each loading control unit comprises a clamping forcep with the movement capable of being independently controlled, a flexible belt with the work length adjustable, a movable slider capable of moving up and down, a vertical lead screw and a vertical movement control motor; the load in plate material stretch forming is applied by the clamping forceps; the movement trajectories of the clamping forces are controlled through the loading control units; a plate material and a stretch forming mold molded surface can be closely attached in real time, and the optimal curved surface stretch forming effect and an accurate stretch-forming curved surface part are obtained; and the device is adopted for forming the curved surface part, various defects in the curved surface forming process can be avoided, the excessive materials of the process can be remarkably reduced, and materials are saved.

Description

technical field [0001] The invention relates to a curved surface stretch forming device controlled by multi-point loading, which belongs to the field of metal plastic processing and is suitable for stretch forming of large three-dimensional curved surface parts. Background technique [0002] Stretch forming is an important forming method for large three-dimensional curved surface parts, and has been widely used in aviation manufacturing, high-speed trains, ships and modern buildings. The traditional stretch forming process mainly adopts integral clamps. The displacement experienced by the end of the sheet clamped by the clamps is the same, and the sheet material does not actively deform with the mold surface in the transverse direction. When forming a curved surface with a relatively large transverse curvature, in order to ensure that the sheet metal fits perfectly with the mold, a sufficiently long suspension section is usually required, which leads to a great reduction in ...

AI Technical Summary

Problems solved by technology

When forming a curved surface with a relatively large transverse curvature, in order to ensure that the sheet metal and the mold are completely attached, a sufficiently long suspension section is usually required, which leads to a great reduction in the utilization rate of the material

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