Bending stretch shaping method and shaper for low-melting point alloy mould

Abstract

A method for manufacturing the low-smelting-point alloy mould by curving-drawing features that the die pad consisting of at least two groups of at least two elastic head blocks are arranged between upper male die and workpiece and the height and position of said elastic bead block are regulated in real-time mode for meeting the technological requirement. Its advantages are high productivity, high rate of finished products, and low cost.

Description

technical field [0001] The present invention relates to a mold pad for deep drawing arranged on a press or related to the press, and non-cutting forming of bending and deep drawing with an elastic mold pad, especially relates to a forming of bending and deep drawing using a low-melting point alloy mold Method and device thereof. Background technique [0002] The low-melting point alloy forming die is a simple die suitable for manufacturing multi-variety, small-batch industrial products and samples, and has high economic value. It is a single-process concave and convex mold that uses the mold-making sample to be molded in the low-melting liquid alloy after solidification, and the low-melting point alloy is naturally formed. The metal sheet blank is bent, drawn, and formed on the matching press. If the shape of the workpiece is relatively complex, or if deep drawing deformation is required, wrinkling and cracking will easily occur, and molding defects will often occur, result...

AI Technical Summary

Problems solved by technology

If the shape of the workpiece is relatively complex, or if deep drawing deformation is required, it is very prone to wrinkling and cracking, and molding defects often occur, resulting in a decrease in yield

For quick-change low-melting-point alloy molds, if they are equipped with specially designed ejectors and elastic blankholder auxiliary devices such as blankholders like the existing steel molds, it will not only increase the production cost and preparation cycle of the mold, but also make the The low-melting point alloy mold is suitable for the manufacture of many varieties and small batches of industrial products and samples. The change of force is from small to large, that is, as the drawing depth increases, elastic materials such as springs and rubber are compressed, and the blank holder force gradually increases, which cannot meet the requirement that the blank holder force must change from small to large during the bending and deep drawing process. The requirements of changing from large to small can not effectively avoid the phenomenon of wrinkling and cracking of the workpiece, and significantly improve the yield

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