Abstract
The traditional LD type electric single-girder crane beam is made from several U type grooves by welding them together. For many years, U type groove is usually made from 5mm or 6mm steel plate which is stamped and formed by rolling machine. Through analysis of the problems and the disadvantages about the traditional producing process of LD type electric single-girder crane girder, put forward the improvement of cold roll forming process. The process has no welding seam, and allows a girder manufacture to achieve higher quality and efficiency, and has low consumption, low pollution.
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