Method for machining powder metallurgy material gear ring and steel material gear body combined automobile transmission gear
A technology for automobile gearboxes and gear bodies, applied to metal processing equipment, manufacturing tools, and edge parts of workpieces, to achieve low manufacturing costs, suitable for large-scale production, and reduce production costs
Active Publication Date: 2011-06-15
DONGFENG PEUGEOT CITROEN AUTOMOBILE
View PDF8 Cites 7 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] Due to the difficulty in processing the powder metallurgy gear ring and the steel body, there is no literature report on the production of the powder metallurgy gear ring and the steel gear body in the production of existing automotive gearbox gears.
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0024] Such as figure 1 As shown, the structure of the automobile gearbox gear combining the welded powder metal gear ring and the steel material gear body is schematic. The shaft of the steel material gear body 1 (driven gear) is sleeved with a powder metal gear ring 2, and the weld 3 Such as figure 2 As shown in the figure, h1 is the effective weld depth; h2 is the total depth of the weld; L is the width of the weld; a or b is the deviation of the weld. 4 is the joint surface.
[0025] The powder metallurgy material ring and steel gear are used for laser welding, and the research and application of powder metallurgy material laser welding technology in the field of powder metallurgy materials is very limited, especially the laser welding technology of powder metallurgy materials and steel parts is still under research stage, there is no experience to learn from. Due to the pores between the fine particles of powder metallurgy parts, surface and internal defects are very ...
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
| Property | Measurement | Unit |
|---|---|---|
| Density | aaaaa | aaaaa |
Login to View More
Abstract
The invention discloses a method for machining a powder metallurgy material gear ring and steel material gear body combined automobile transmission gear. In the method, after a powder metallurgy material gear ring and a steel material gear body are pressed and arranged, the powder metallurgy material gear ring and the steel material gear body are welded into a whole through laser, and the whole is subjected to nitrocementation and quenching heat treatment; during laser welding, the depth h1 of effective welding lines between the powder metallurgy material gear ring and the steel material gear body is more than or equal to 1.8 millimeters, the total depth h2 of the welding liens is 2.0-2.5 millimeters, and the width L of the welding lines is 2.0-2.4; and before the nitrocementation and quenching heat treatment, cleaning before heating is not needed. The invention breaks through the application field of powder metallurgy materials, provides a way of reducing production cost for manufacturers, and fills up a blank of laser welding of powder metallurgy parts and steel parts in the automobile industry of China.
Description
technical field [0001] The invention belongs to a production and processing method of auto parts, in particular to a processing method of an automobile transmission gear. Background technique [0002] At present, the traditional technology of automotive transmission gear assembly is to use steel materials to complete the manufacture by machining. According to different product requirements, it is divided into two types: the overall design of the gear and the ring, and the separate design of the gear and the ring. For split-design gear assemblies, welding is generally used to connect the gear and the ring gear. The two parts are made of steel with similar chemical composition and mature welding technology. However, the manufacturing cost of the traditional steel ring gear is high. The gear ring of powder metallurgy material has the characteristics of low production cost and high strength. The general steps of powder metallurgy parts are: 1. Compression molding; 2. Sintering;...
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
Login to View More IPC IPC(8): B23P15/14B23K26/20B23K33/00B23K26/28
Inventor 朱丽丹张忠林杨月华夏曦朱国珍
Owner DONGFENG PEUGEOT CITROEN AUTOMOBILE