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
View PDF9 Cites 24 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Hollow shaft and manufacturing method thereof
  • Hollow shaft and manufacturing method thereof
  • Hollow shaft and manufacturing method thereof

Examples

Experimental program
Comparison scheme
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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
Login to view more

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap