Method and device for manufacturing double axle tube blanks at one time in a local electric upsetting mode

Abstract

The invention discloses a device and method for manufacturing double axle tube blanks at one time in a local electric upsetting mode. The device comprises two pairs of clamping cylinders, the front ends of telescopic arms of each pair of clamping cylinders are provided with a pair of clamping components, and the two pairs of clamping components are made of conductive materials and connected with the output end of a heating transformer through wires respectively; the device further comprises the heating transformer, two heading cylinders which are oppositely arranged at the two ends of the direction of the central line of two pairs of clamping rods, two sleeves and a mandrel. The method is implemented through the device, according to the technological process, the end portions of two steel tubes with the same specification are connected in a butted mode. and the two steel tubes are placed on the manufacturing device to undergo local upset forging, and finally the double axle tube blanks are formed at one time. The device and method solve the problem that in the prior art, the end portions are large and a flange is difficult to form, moreover, the double through hollow tube blanks difficult to form can be produced just in one process through the forming technology, and thus the axle tube blanks can be formed fast and conveniently.

Description

technical field [0001] The invention belongs to the field of metal plastic forming in material processing engineering. It specifically relates to a technology for forming a half-shaft sleeve to process a steel pipe and a similar hollow shaft forging blank. Background technique [0002] The half-shaft bushing is a key part of the chassis part of the car, and the working conditions are heavy load, strong impact and vibration. Its structure is in the shape of a long cylinder as a whole, and has a region with a larger diameter and thicker thickness at one end and a flange-like raised round table for docking at the end. During the operation of the car, the half-axle casing bears the weight of the entire body and the cargo on board. At the same time, due to changes in road conditions, it must also bear various complex alternating stresses. Therefore, the forging quality of the axle shaft sleeve directly affects the driving safety of the vehicle. [0003] At present, there are ...

AI Technical Summary

Problems solved by technology

The upsetting and extrusion method of seamless steel pipes cannot form forgings with larger flanges at the end. In addition, the material price is high, the production cost is high, and the application range is shrinking

There are two main problems in the other process: one is that the forming inner hole adopts the reverse extrusion method, the length of the extrusion punch is longer (not less than the height of the forging), the slenderness is relatively large, it is easy to deform during work, and the service life is low. It is necessary to change the punch frequently in the process, which has become the main factor restricting the increase of productivity; secondly, after the extrusion process, it is necessary to set up a separate process to remove the continuous skin left by the reverse extrusion, and sometimes it is necessary to set up the end cutting process, not only the process Long, low material utilization rate, high production cost, complex processing process, seriously affect the production efficiency of the product

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