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Hollow shaft and manufacturing method thereof

A manufacturing method and hollow shaft technology, applied in the direction of pivot connection, etc., can solve the problems of poor surface wear resistance and rust resistance of workpieces, large waste of raw materials, increased processing workload, etc., and achieve uniform performance, good compactness, The effect of reducing the processing workload

Active Publication Date: 2013-10-09
ZOOMLION HEAVY IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing method of producing the hollow shaft is to use the bar as the raw material to saw the bar and cut it off, and then drill a hole on the drilling machine to form a central through hole, which wastes a lot of raw materials and increases the subsequent processing workload; in addition, In the existing method, only lubricating oil is applied to the inner and outer peripheral surfaces of the hollow shaft without other surface treatment, and the surface wear resistance and rust resistance of the workpiece are poor.

Method used

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

Examples

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Effect test

Embodiment

[0058] 5 groups of hollow shafts were manufactured, the material of the hollow shafts was 42CrMo, and 20 hollow shafts were manufactured for each group, wherein the 1st to 3rd groups were examples, and the 4th to 5th groups were comparative examples.

[0059] The steps are made as follows:

[0060] a. Manufacture a tubular blank by die forging, rough turn the outer peripheral surface of the blank, and flatten the two end faces of the blank along the axial direction to make a blank, the wall thickness of the blank in each group is as follows shown in Table 1;

[0061] b. Carrying out heat treatment to the billet, the heat treatment comprising sequentially quenching and tempering the billet:

[0062] The quenching treatment includes heating the billet to the quenching temperature and keeping it at this temperature for a period of time. When heating the billet during the quenching treatment, when the temperature of the billet is less than 600°C, the temperature of the billet is...

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Abstract

The invention discloses a hollow shaft and a manufacturing method thereof. The method includes the steps of step a, manufacturing a tubular blank in a forging or casting mode to obtain blank materials, step b, carrying out heat treatment on the blank materials, step c, machining the blank materials after heat treatment so as to form a semi-finished product with the same shape and size as the hollow shaft, and step d, carrying out surface treatment on the semi-finished product to obtain the hollow shaft. According to the hollow shaft and the manufacturing method thereof, the tubular blank is used for manufacturing the hollow shaft, due to the fact that the blank is provided with a central through hole, raw materials are saved, and machining workload in subsequent links is reduced.

Description

technical field [0001] The invention relates to the field of machining, in particular to a hollow shaft and a manufacturing method thereof. Background technique [0002] As the requirements for lightweight design of many mechanical equipment are getting higher and higher, solid shafts are increasingly replaced by hollow shafts. For example, the pin shafts on the booms of concrete pumping equipment are increasingly adopting hollow structures. The hollow shaft can reduce the weight of the vehicle. However, compared with the solid shaft, the processing requirements of the hollow shaft are more stringent: the wall thickness must be uniform, and the coaxiality between the central through hole and the outer peripheral surface must be guaranteed, and the center must be guaranteed. The respective cylindricity of the through hole and the outer peripheral surface, and at the same time, in order to improve the strength and wear resistance of the hollow shaft, the requirements for the h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00F16C11/04
Inventor 黄大为吴德志李盼田相玉
Owner ZOOMLION HEAVY IND CO LTD
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