Method for improving tooth trace precision of internal spline after heat treatment

A technology of internal splines and tooth direction, which is applied in the field of improving the tooth direction accuracy of internal splines after heat treatment. It can solve the problems that cannot meet the accuracy requirements of splines and eliminate the deformation of carburizing heat treatment, etc., and achieve the effect of improving the tooth direction accuracy.

Inactive Publication Date: 2018-07-06
HARBIN DONGAN ENGINE GRP
View PDF14 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inner spline cannot be ground after carburizing heat treatment, and the deformation caused by carburizing heat treatment cannot be eliminated
At present, after heat treatment, the carburizin...

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] A process method for improving the tooth alignment accuracy of internal splines after carburizing, the specific steps are as follows:

[0022] 1. Internal spline diameter control

[0023] Grinding the small diameter of the internal spline, the tolerance zone is controlled within 0.015mm, and the cylindricity of the small diameter is ≤0.005mm;

[0024] 2. Mandrel production

[0025] Choose a material with a smaller thermal shrinkage rate than the parts, process 5-level mandrels according to the nominal value of the small diameter of the inner spline, and the dimensional tolerance of each level of mandrel is 0.003mm;

[0026] 3. Optional mandrel

[0027] The small diameter of the internal spline and the size of the mandrel are selected to ensure that the gap is ≤0.005mm;

[0028] 4. Heat treatment

[0029] When carburizing, place the gear equipped with mandrel vertically in the heat treatment furnace, and carry out carburizing treatment according to the specified heat...

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

No PUM Login to view more

Abstract

The invention relates to a technical method for improving the tooth trace precision of an internal spline after carburization. A core rod of which the shrinking percentage is smaller than that of a part material is applied to tightly support the small diameter of the part internal spline, and accordingly, the stability of the slope deformation tendency of the tooth trace of the part internal spline is controlled; and through data comparison, the tooth trace change error of the internal spline subjected to carburization heat treatment is analyzed and summarized, a grinding rod is applied to make contact with the unilateral tooth face of the part internal spline, and the grinding rod does linear reciprocating motion to finish the tooth face error of the internal spline. According to the technical method, the problem that after the small-modulus internal spline is subjected to carburization heat treatment, the tooth trace cannot be trimmed through tooth grinding equipment is solved. Through the technical scheme, the effects that the tooth length is 40 mm, the tooth trace error of the internal spline is smaller than or equal to 0.01 mm, and the tooth trace precision of the internal spline reaches fifth grade.

Description

technical field [0001] The invention relates to a method for improving the precision of tooth alignment of internal splines after heat treatment. Background technique [0002] In the aviation field, the accessory drive gear often uses internal splines as the way to transmit torque. With the continuous improvement of transmission stability requirements and the continuous increase of transmission torque, internal splines are often used for carburizing heat treatment requirements, and splines are required The precision of the tooth part reaches about 5~6 grades. The size and structure of aviation accessory transmission gears are small, so the internal splines usually have a small number of teeth and a small modulus. The minor diameter of the splines is generally between 10mm and 40mm, which is limited by the structural size and the capacity of the gear grinding equipment. The internal spline cannot be ground after carburizing heat treatment, and the deformation caused by carbu...

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
IPC IPC(8): B23P15/14
CPCB23P15/14
Inventor 黄啸张阳关云超孙浩刘薇王作鹏叶君王春雷朱光照王书杭
Owner HARBIN DONGAN ENGINE GRP
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