Pass design method of continuous rolling machine

Abstract

The invention discloses a pass design method of a continuous rolling machine. The method comprises the following steps of inputting the setting parameters of pass; determining the average extension coefficient of the top pass of each machine frame and the extension coefficient of the top pass; according to the extension coefficient of the top pass of each machine frame, determining the wall thickness of the outlet of each machine frame; selecting the size of a core rod, determining the gap of a penetrating rod, and distributing the extension coefficient of the top pass of each machine frame; according to the extension coefficient of the top pass of each machine frame, determining the wall thickness of the top pass of each machine frame; determining the height of the pass of each machine frame, calculating the radius R<1i> of the pass of each machine frame, and obtaining the eccentric distance of each machine frame; calculating the radius of disengaging arc, determining the disengaging angle alpha1 and connecting angle alpha4, and using a CAD (computer-aided design) method to determine the radius R<5> of the connecting arc. The method has the advantages that the time and labor are saved, and the convenience and rapidity are realized when the pass is calculated.

Description

technical field [0001] The invention relates to a continuous rolling mill, in particular to a design method for the pass of the continuous rolling mill. Background technique [0002] The three-roll continuous pipe rolling mill, referred to as PQF (Premium Quality Finishing), has the advantages of more reasonable deformation and stress of each stand, significantly improved steel pipe wall thickness tolerance, smoother steel pipe surface, and can roll more steel types and more efficient rolling. Thin steel pipe, high output and metal recovery rate, significantly reduced consumption of tools and mandrels, etc. The continuous rolling unit in the φ460 work area of ​​our factory is a 5-stand three-roller limited mandrel PQF continuous rolling pipe mill imported from Germany MEER company. [0003] With the change from the seller's market to the buyer's market, users have stricter requirements on pipe quality, such as wall thickness uniformity, internal and external surface quality...

AI Technical Summary

Problems solved by technology

With the continuous rolling, the equipment tends to be stable, and the output is also increasing, but some corresponding process problems are gradually exposed.

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