Drawing, expanding and follow-up heating device of cold-drawing unit

Abstract

The invention discloses a drawing, expanding and follow-up heating device of a cold-drawing unit. One end of a water-cooled cable is connected with a high-voltage electric heating capacitor bank, and the other end is connected with an induction heating coil; one end of an insulation pull rod is fixed on a follow-up trolley, and the other end is connected with the induction heating coil; each lifting carrier roller consists of an air cylinder and a carrier roller rack; the extension length of each air cylinder is adjusted through an adjusting bolt; a traction rod is divided into three sections; pin shaft adjusting holes are drilled in the middle section at equal intervals; one end of the traction rod is connected with the follow-up trolley through a pin shaft I; the other end of the traction rod is connected with the drawing trolley through a pin shaft II; a traction rod carrier wheel is formed by assembling two bearing blocks and one carrier wheel; the lifting sequence of the lifting carrier rollers is controlled by travel switches; and the induction heating coil is formed by winding a copper tube on a stable frame which is fixed on an insulation bakelite plate through welded stainless steel bolts. According to the drawing, expanding and follow-up heating device, the heating speed and the drawing speed are synchronized; the heating speed for a workpiece is high; and the heating is uniform.

Description

technical field [0001] The invention relates to a follow-up heating device, in particular to a drawing diameter-expanding follow-up heating device for a cold drawing unit. Background technique [0002] The drawing force of the large thick-walled tube billet required by the cold drawing unit is relatively large, and the existing drawing unit cannot provide the corresponding drawing force to meet the production demand, so a large-tonnage cold drawing unit needs to be invested, which increases the company’s fixed production cost; the existing drawing unit needs multi-pass drawing to draw the tube blank with large diameter change, which increases the mold specification and labor time, increases the production cost, and prolongs the production cycle; for some cold and brittle material tubes Billets cannot be produced by cold drawing units, and need to purchase new equipment or outsource production, which has limitations on the company's production and processing capabilities; the...

AI Technical Summary

Problems solved by technology

[0002] The drawing force of the large thick-walled tube billet required by the cold drawing unit is relatively large, and the existing drawing unit cannot provide the corresponding drawing force to meet the production demand, so a large-tonnage cold drawing unit needs to be invested, which increases the company’s fixed production cost; the existing drawing unit needs multi-pass drawing to draw the tube blank with large diameter change, which increases the mold specification and labor time, increases the production cost, and prolongs the production cycle; for some cold and brittle material tubes Billets cannot be produced by cold drawing units, and need to purchase new equipment or outsource production, which has limitations on the company's production and processing capabilities; the existing diameter expansion drawing heating requires one heating and a feeding device, the process is cumbersome, and the production cost high

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