Method and apparatus for molding C-shaped hardwares of plastic steel door window

Abstract

The invention discloses a process for forming C-shaped member in the metallic members of the plastic-steel door and window and arrangement thereof, wherein the multiple pairs of forming rolls of the progressive forming machine are used to form by rolling the raw material steel belts of the C-shaped member into C-shaped cross-section, before forming the raw material steel belt, the impression apparatus on the front portion of the progressive forming machine is used to perform impression, i.e., extruding caves along the longitudinal direction of folding line on the C-shaped member of the C-shaped member raw material belt steel, then the C-shaped cross-section is formed by step-by-step roll creasing forming on the folding line. The progressive forming machine comprises a body section, a belt steel guiding device and multiple pairs of progressive forming rollers.

Description

technical field [0001] The invention relates to a molding method of plastic-steel door and window hardware, in particular to a molding method and device for C-shaped pieces at the corners of the plastic-steel door and window hardware system. Background technique [0002] The so-called C-shaped piece is an important part used at the corner in the plastic-steel door and window hardware system, such as figure 1 , figure 2 The structure of the C-shaped piece shown is made of 0.8 mm thick raw strip steel, and its cross-section is as follows figure 2 For the C shape shown, the groove gap at the corner of the C-shaped piece is required to be greater than or equal to 0.9 mm. The manufacturing method of the C-shaped part of the above-mentioned structure is a very important problem in the molding method of the C-shaped section, which is a cold working technology, usually made by compression molding. For example, Chinese patent 97118656.1 provides a method of producing special-sha...

AI Technical Summary

Problems solved by technology

[0003] The C-shaped part of the above-mentioned plastic-steel door and window hardware, the C-shaped cross-section can be formed by rolling forming method, using a rolling forming machine to roll the 0.8 mm thick strip steel along its longitudinal direction, from the outside to the inside from both sides. Bending to form a C-shaped section, and the bending line must be bent to 90°. This is a good method, but due to the pressure on the inner surface and the tension on the outside, it is prone to cracks.

Also do not have the method and the device that solve this problem at present

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