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Hollow shaft and manufacturing method thereof

A manufacturing method and hollow shaft technology, applied in the directions of shafts, bearings, shafts and bearings, can solve the problems of large processing volume, waste of raw materials, parts failure, etc., to reduce deformation resistance, improve appearance quality, and prevent metal from being corroded. Effect

Inactive Publication Date: 2020-04-21
JIANGSU SUNWAY PRECISION FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above-mentioned processing technology, the processing volume of machining is very large, and raw materials are wasted, and defects are also prone to occur at welding points, which makes parts fail early. Compared with solid shafts, it is more difficult to process hollow shafts with necking at both ends.

Method used

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  • Hollow shaft and manufacturing method thereof
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  • Hollow shaft and manufacturing method thereof

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Effect test

Embodiment 1

[0049] In the traditional hollow shaft processing technology, the amount of machining is large, and raw materials are wasted, and defects are prone to occur at the welds, causing premature failure of parts. Compared with solid shafts, it is more difficult to process hollow shafts with necking at both ends. Therefore, the present invention provides a hollow shaft and its manufacturing method to solve the above problems.

[0050] figure 1 It is a structural schematic diagram of the bar stock described in the present invention; figure 2 It is a schematic cross-sectional view of the blank described in the present invention; image 3 It is a schematic cross-sectional view of the tubular rough blank of the present invention; Figure 4 It is a schematic cross-sectional view of the tubular thin billet of the present invention; Figure 5 It is a schematic cross-sectional view of the tubular compact according to the present invention; Image 6 It is a structural schematic view of t...

Embodiment 2

[0082] In the traditional hollow shaft processing technology, the amount of machining is large, and raw materials are wasted, and defects are prone to occur at the welds, causing premature failure of parts. Compared with solid shafts, it is more difficult to process hollow shafts with necking at both ends. Therefore, the present invention provides a hollow shaft and its manufacturing method to solve the above problems.

[0083] figure 1 It is a structural schematic diagram of the bar stock described in the present invention; figure 2 It is a schematic cross-sectional view of the blank described in the present invention; image 3 It is a schematic cross-sectional view of the tubular rough blank of the present invention; Figure 4 It is a schematic cross-sectional view of the tubular thin billet of the present invention; Figure 5 It is a schematic cross-sectional view of the tubular compact according to the present invention; Image 6 It is a structural schematic view of t...

Embodiment 3

[0115] In the traditional hollow shaft processing technology, the amount of machining is large, and raw materials are wasted, and defects are prone to occur at the welds, causing premature failure of parts. Compared with solid shafts, it is more difficult to process hollow shafts with necking at both ends. Therefore, the present invention provides a hollow shaft and its manufacturing method to solve the above problems.

[0116] figure 1 It is a structural schematic diagram of the bar stock described in the present invention; figure 2 It is a schematic cross-sectional view of the blank described in the present invention; image 3 It is a schematic cross-sectional view of the tubular rough blank of the present invention; Figure 4 It is a schematic cross-sectional view of the tubular thin billet of the present invention; Figure 5 It is a schematic cross-sectional view of the tubular compact according to the present invention; Image 6 It is a structural schematic view of t...

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Abstract

The invention relates to a hollow shaft and a manufacturing method thereof. The method comprises the steps that a rod is firstly subjected to warm forging, a blank with a closed end face is reverselyextruded through warm forging, the closed end face of the blank is removed through machining, and a tubular rough blank is obtained; the tubular rough blank continues to be subjected to spheroidizingannealing treatment, after being cooled, the tubular rough blank is subjected to shot blasting treatment, phosphating and saponification, then the tubular rough blank is subjected to cold forging anddrawing, and a tubular thin blank is obtained; then the tubular thin blank is milled, the irregular end face of the tubular thin blank is removed, and a tubular fine blank is obtained; and the tubularfine blank continues to be subjected to low-temperature annealing treatment, after being cooled, the tubular fine blank is subjected to shot blasting treatment, after oxide scale on the surface of the tubular fine blank is removed, radial forging is carried out, and hollow shafts of different specifications and types can be obtained according to requirements. By means of the manufacturing method,overall anti-deformation performance after part forming is guaranteed, the machining quantity of the machining process is reduced, and raw materials are saved.

Description

technical field [0001] The invention relates to the technical field of metal forming, in particular to a hollow shaft and a manufacturing method thereof. Background technique [0002] As automobiles and other machinery have higher and higher requirements for lightweight design, the application of solid shafts is gradually replaced by hollow shafts. Compared with the solid shaft, the hollow shaft has the advantages of lighter weight, larger surface area and easier cooling. [0003] Traditional hollow shafts have two process routes: ① Hollow shafts with a length-to-diameter ratio of less than 4 are produced by sawing and blanking the bar, gun-drilling through holes, and then machining and boring the inner hole; ② Hollow shafts with a larger length-to-diameter ratio The hollow shaft needs to use the above process to make two symmetrical hollow half shafts, and then connect the two half shafts into a hollow shaft by means of friction welding. In the above-mentioned processing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/14F16C3/02
CPCB23P15/14F16C3/02F16C2220/46F16C2220/62F16C2220/66F16C2223/02F16C2223/08F16C2223/10F16C2361/31
Inventor 秦国琛袁海兵顾冰朱华陈博文
Owner JIANGSU SUNWAY PRECISION FORGING
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