Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Carburizing and quenching large inner gear ring machining method

A technology of carburizing and quenching and processing methods, which is applied in the field of gear processing, can solve problems such as failure to achieve design accuracy and life, and achieve good comprehensive mechanical properties, low energy consumption, and avoid process waste.

Active Publication Date: 2021-03-26
CHONGQING GEARBOX
View PDF8 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a carburizing and quenching large internal tooth ring processing method for the existing large internal tooth ring gear processing method that cannot achieve the design accuracy and life. Ensure the depth and hardness of the hardened layer so that low-carbon alloys can be used to manufacture gears, so that the gear core has good comprehensive mechanical properties, and the tooth surface has sufficient strength, hardness and wear resistance to ensure service life; During the clamping process, through two alignments, the grinding allowance after processing is evenly distributed, and the gear accuracy is ensured by grinding the teeth, so as to ensure the meshing accuracy of the gears and prolong the service life

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
  • Carburizing and quenching large inner gear ring machining method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the described embodiments.

[0029] A method for processing a carburized and quenched large internal gear ring, comprising the following steps:

[0030] The first step, forging: including controlling the forging ratio as required, and testing the bulk grain size, mechanical properties and forging defects with samples;

[0031] The second step, normalizing: to refine the grain and eliminate the forging stress;

[0032] The third step is to remove the black skin rough turning: according to the principle of roughness of Ra3.2 and retaining the maximum physical size, the black skin is removed by turning;

[0033] The fourth step, flaw detection: use an ultrasonic flaw detector to conduct ultrasonic flaw detection to detect internal defects of the gear blank, so as to eliminate gear blanks with internal defects that ar...

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 discloses a carburizing and quenching large inner gear ring machining method. The method comprises the steps of removing of machining stress, semi-finish turning, gear milling, carburizing, induction quenching, finish turning and tooth grinding in sequence after tooth punching is completed; carburizing is carried out according to the set depth of a hardening layer; tooth-by-tooth induction quenching is carried out in a profiling mode in the induction quenching process; a vertical lathe is used during finish turning for clamping and machining the machining content including a tooth grinding and clamping benchmark; the alignment process of finish turning includes preliminary alignment and accurate alignment, preliminary alignment is carried out according to the alignment gear center and the leveling end surface, and gear deformation data are obtained by detecting gear reference circle run-out values of multiple sections in the tooth width direction; accurate alignment is conducted according to the obtained gear deformation data and the tooth grinding allowance uniform distribution principle; and according to tooth grinding, the tooth surface is ground to obtain a finished product. The method has the beneficial effects that the gear can be made of low-carbon alloy steel, and is long in service life, low in energy consumption, low in machining cost and high in production efficiency.

Description

technical field [0001] The invention relates to gear processing technology, in particular to a carburizing and quenching large internal tooth ring gear processing method. Background technique [0002] The development trend of gearboxes in the machinery industry is light weight, large size, high power density, 20-year lifespan or even unlimited lifespan. As a very important form of gearbox, planetary gearbox plays an especially obvious role in the national economy. At present, the wind power gearbox has been developed to 5 MW, 7 MW or even more than 10 MW. The internal ring gear, which is a key part of the planetary gearbox, also has higher requirements. The inner ring gear not only requires carburizing and quenching of low-carbon alloy carburizing steel, but also requires high mechanical properties in the core structure, including high strength, high toughness, impact resistance, and high hardness on the tooth surface. Usually, the Rockwell hardness requirement is HRC58-6...

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): B23P15/14
CPCB23P15/14
Inventor 郑捷陈金虎张琰伍艺张彩凤
Owner CHONGQING GEARBOX
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products