Cross wedge rolling multi-step shaft heat straightening machine

Abstract

The invention provides a cross-wedge rolling multi-step shaft part heat straightening machine. The cross-wedge rolling multi-step shaft part heat straightening machine comprises a machine frame, wherein the left side of the machine frame and the right side of the machine frame are respectively provided with a driving roller groove and a driven roller groove, two supports are arranged in the two driving roller grooves respectively, an upper driving roller and a lower driving roller are correspondingly arranged on the two supports respectively, one end of one of the driving rollers is meshed and connected with one end of the other driving roller through a gear, sliding blocks are arranged on the two driven roller grooves respectively, driven rollers are arranged on the two sliding blocks respectively, the upper ends of the sliding blocks are connected with hydraulic oil cylinder piston heads respectively, the sliding blocks can slide up and down along the driven roller grooves respectively, and the driving rollers and the driven rollers are all designed into a step shaft structure. A feed port is formed above the machine frame, a photoelectric induction device is arranged on the feed port, a discharge port is formed in the bottom of the machine frame, an automatic material blocking device is arranged on the discharge port, and a driving device is arranged on a machine frame base and connected with one of the driving rollers. The cross-wedge rolling multi-step shaft part heat straightening machine is ingenious in design and low in cost, the quality of products is greatly improved, the production efficiency is greatly improved, and the cross-wedge rolling multi-step shaft part heat straightening machine has great economic value.

Description

technical field [0001] The invention relates to the technical field of straightening of multi-step shaft parts, in particular to a thermal straightening machine for cross-wedge rolling multi-step shaft parts. Background technique [0002] During the metal cutting process of cross-wedge rolling multi-step shaft parts, it is generally necessary to carry out three cold straightenings on the rough, semi-finished products and finished products, namely rough correction, intermediate correction and fine correction. Cold straightening is to place the two ends of the shaft product to be straightened on the two runner surfaces of the cold straightening machine, and make the product rotate while using a stylus to measure, find the high point of bending, and then pass the cold straightening The pressure column of the straight machine moves down, exerting pressure on the bending part, and the product undergoes plastic deformation to achieve the purpose of straightening. There are two pr...

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Problems solved by technology

There are two problems in cold straightening: first, when the distance between the two bends of the product is small, it is difficult for the straightening machine to find the two support points for pressure, and cannot straighten, forming a permanent bend, which is often called a dead bend. Cause black skin to form waste products in machining; second, cold straightening is plastic deformation, which often forms straightening stress accumulation, and stress points appear inside the product, which affects subsequent cutting processing and tool life. When the stress is particularly severe, in narrow There will also be product breakage in the span

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