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Slender stepped shaft machining process

A slender shaft and process technology, which is used in the field of manufacturing processes of semi-shafts without or with flanges and multi-step slender shafts for automobiles, can solve the problem of low density of metal grains, pores and micro-cracks, workpieces. Tissue shrinkage and other problems, to achieve the effect of improving internal quality, fine micro-grain structure, and improving dendrite segregation

Inactive Publication Date: 2007-06-06
QINGTE GRP
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The invention provides a manufacturing process of a multi-stage slender shaft, which can solve the phenomenon of shrinkage, porosity and microcracks in the workpiece structure caused by segmental heating in the prior art, and the metal crystal grains have low density and are not Equilibrium and other issues

Method used

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Experimental program
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Embodiment Construction

[0031] See Figure 3-1 and Figure 3-2,

[0032] In the first step, the round bar 8 of a certain specification is taken out after being heated to a temperature of 1150°C in an intermediate frequency induction heating furnace;

[0033] In the second step, the cross wedge rolling machine is used to carry out overall rolling forming of the required rolling parts, such as through shafts, camshafts, intermediate shafts and other parts without flanges, which are formed.

[0034] See Figure 2-1, Figure 2-2 and Figure 2-3,

[0035] 1. Raw materials: choose large-scale die-cast steel or continuous cast steel as raw materials, and cut to an appropriate length.

[0036] 2. Billet making: Raw material 5 is integrally heated to about 1150°C in a medium-frequency induction heating furnace and formed in a cross-wedge rolling mill at one time, and the spline 6 and rod of the half shaft are forged with large deformation at the same time. The large-diameter raw material is heated to the forging...

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Abstract

The present invention provides slender stepped shaft machining process. The technological process includes heating rod material in a medium frequency induction heating furnace to required temperature, and rolling in a wedge rolling machine to form the slender stepped shaft. For slender stepped shaft with flange, the integrally rolled shaft is further locally forged in a swinging rolling machine to form flange. The technological process combining heating in medium frequency induction heating furnace, rolling in a wedge rolling machine and local forging in a swinging rolling machine has low power consumption and high efficiency.

Description

technical field [0001] The invention relates to a manufacturing process of shaft parts, especially suitable for the manufacturing process of semi-shafts without or with flanges and multi-step slender shafts for automobiles. Background technique [0002] The traditional multi-step slender shaft process method is "three fires" forging and forming. The process flow is as follows: [0003] See Figure 1-1, Figure 1-2, Figure 1-3 and Figure 1-4, [0004] Figure 1-1 is the raw material; Figure 1-2 is the aggregate of the spline section; Figure 1-3 is the blanking of the flange section; Figure 1-4 is the forming of the flange section. [0005] 1. Raw materials: Die-cast steel or continuous cast steel as thick as the half-shaft rod is selected as the raw material. [0006] 2. Polymerization and billeting of the spline section: one end of the raw material, such as the blank spline, is heated locally to 1200°C for the first time, and then formed with a friction press or flat forging ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21H1/22B21B1/08B23P13/00B23P23/04
CPCB21H1/18B21J5/08B21K1/12
Inventor 纪爱师纪奕春邢伟吴章涛王吉慧
Owner QINGTE GRP