Production line and production method of channel steel for large-scale forklift mast

Abstract

The invention discloses a production line and production method of a steel channel used for a large-scale forklift portal frame. The production line comprises a reversible roughing mill and an all-powerful finishing mill group arranged behind the reversible roughing mill, the all-powerful finishing mill group comprises an all-powerful finishing mill U1, an all-powerful finishing mill U2 and an edging mill E1 which are all arranged in sequence of the U1, the E1 and the U2; each edging mill of the all-powerful finishing mill group utilizes a two side roll gap value, rolling reduction and hole patterns with different extend rates; the production method comprises the steps that step 1, a blank is rolled by the use of the reversible roughing mill to roll an eudipleural rolling piece for the need of being put in the finishing mill group; step 2, the rolling mill of the U1, the E1 and the U2 are used for rolling the eudipleural rolling piece which is obtained in the step 1 to obtain the steel channel used for the large-scale forklift portal frame. According to the large-scale forklift portal frame produced in the method, the rigidity of the portal frame is improved under the condition of guaranteeing the use performance, the processing efficiency is improved, and the manufacturing cost of the forklift portal frame is lowered.

Description

technical field [0001] The invention belongs to the technical field of mechanical manufacturing and metal material processing and forming, and specifically relates to a production line and a production method of channel steel for large-scale forklift masts. The channel steel for forklift masts obtained by the method can replace steel plates for welding forklift masts. While ensuring the performance, the rigidity of the mast is effectively improved, complex processes such as cutting steel plates and butt welding are avoided, the processing efficiency is improved, and the manufacturing cost of the forklift mast is reduced. Background technique [0002] The channel steel for the forklift mast is a long strip of steel with a C-shaped cross section, which is mainly used for the production of the forklift mast. Taking the three-level mast as an example, the entire mast system is composed of three-section telescopic devices consisting of the outer mast, the middle mast and the inne...

AI Technical Summary

Problems solved by technology

[0003] At present, the height of domestically produced channel steel for forklift masts is basically 140 mm to 160 for small-sized forklifts, and the products with large specifications of 180 mm or more are prone to uneven flange ends and wing flanges during the rolling process due to their large size and high precision requirements. Asymmetrical edge thickness, asymmetrical flange width, asymmetrical R angle and other defects need to be equipped with high-power rolling mills, so there are currently few manufacturers, and hot rolling production is extremely difficult

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