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Compressional deformation strengthened flexible hollow half axle and fabrication process thereof

A hollow half shaft and manufacturing process technology, applied in the directions of axles, wheels, transportation and packaging, can solve the problems of high manufacturing cost, failure to meet usage requirements, and low production efficiency.

Inactive Publication Date: 2009-01-21
邓晓光
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flexibility of the hollow half shaft produced by this process is better than that of the solid half shaft, but it still does not meet the ideal use requirements
Moreover, the steel utilization rate of this process is low, and the inner hole of the half shaft is drilled with special gun drilling equipment, and its production efficiency is very low. For example, it takes more than 40 minutes to drill a hollow half shaft with an inner hole diameter of 14.5 mm and a length of 800 mm.
Therefore, the manufacturing cost of this hollow half shaft is higher than that of the solid half shaft, and the production efficiency is lower

Method used

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  • Compressional deformation strengthened flexible hollow half axle and fabrication process thereof
  • Compressional deformation strengthened flexible hollow half axle and fabrication process thereof
  • Compressional deformation strengthened flexible hollow half axle and fabrication process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Embodiment 1, comparison of heavy-duty vehicle axle shafts without flanges:

[0057] The manufacturing process of the heavy-duty automobile solid half shaft without flange is: forging blank - mechanical cutting - heat treatment. The blanking weight of the process is 19 kilograms, and the net weight of the parts is 16.5 kilograms.

[0058] The extrusion forming process of the automobile hollow half shaft without flange is as follows: the first working step: forward extrusion; the second working step: reverse extrusion; the third working step: deep hole extrusion; the fourth working step: Diameter shrinking extrusion; the fifth step: diameter expanding extrusion; the number of extrusion steps required in the extrusion forming process of half-shaft parts with different structural sizes varies according to the amount of extrusion deformation, that is, the same process Step can be divided into multiple times.

[0059] The extrusion deformation strengthened flexible hollow ha...

Embodiment 2

[0061] Embodiment 2, comparison of heavy-duty vehicle axle shafts with flanges:

[0062] The manufacturing process of the heavy-duty automobile solid half shaft with flange is: forging blank - mechanical cutting - heat treatment. The blanking weight of the process is 30 kilograms, and the net weight of the parts is 23.4 kilograms.

[0063] The extrusion forming process of the automobile hollow half shaft with flange is as follows: the first working step: forward extrusion; the second working step: reverse extrusion; the third working step: aggregate material at the big end; the fourth working step : Large end head pressing flange; fifth step: deep hole extrusion; sixth step: shrinking extrusion; seventh step: expanding diameter extrusion; among them, half shaft parts of different structural sizes are extruded The number of extrusion steps required in the forming process varies according to the amount of extrusion deformation, that is, the same step can be divided into multipl...

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Abstract

The invention belongs to the field of automobile manufacturing, relating to a jackshaft part in an automobile power transmission system and the manufacturing technology thereof. The process adopts hyposteel bars of normalized condition as the raw stock, and heats the bar raw stock to 900 DEG C for extrusion molding. The entire extrusion molding process comprises the following extrusion technology: forward extrusion molding technology, overall backward extrusion molding technology, long-hole extrusion molding technology, drawing-down extrusion molding technology and diameter extension extrusion technology; wherein, the number of the working steps of the extrusion technique required in the extrusion molding procedures of the jackshaft parts with different structures and dimensions is different; the temperature of the metal material reduces from 900 DEG C to 100 DEG C; the extrusion workpiece, the shape and dimension of which is similar to that of jackshaft part finished product, is obtained, and the part is manufactured after mechanical cutting processing procedure, alignment and inspection procedures. After the entire extrusion molding is finished, the bending strength, shear strength and impact ductility of the extrusion workpiece are superior to the mechanical performance index of a test bar of the same material which is subject to hardening and tempering as well as heat treatment, and the tensile strength is similar to the test bar of the same material which is subject to hardening and tempering as well as heat treatment; the elastic torsion angle of the hollow jackshaft is larger than 120 degrees.

Description

technical field [0001] The invention belongs to the field of automobile manufacturing, and relates to a transmission half-shaft part in an automobile power transmission system and a manufacturing process thereof. Background technique [0002] The half shaft is the last driving part in the power transmission system of the car. It directly transmits the engine power to the wheel hub and tires of the car, and also reversely transmits the impact force and inertial force of the tires during the driving of the car to the power transmission system of the car. At present, all domestically manufactured cars use solid half shafts, which are made of high-quality medium-carbon structural steel, such as 45#, 55# or low-alloy structural steel such as 40Cr. The hot-rolled round steel of the above material is used as the raw material, and it is formed through blanking → forging → mechanical cutting → heat treatment and other processes. Since the outer layer of the solid half shaft is a har...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60B35/14B23P15/14B21C23/03
Inventor 邓晓光
Owner 邓晓光
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