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

Multi-phase cooling method and device for bearing surface laser quenching

A technology of laser quenching and cooling method, which is applied in the direction of quenching device, furnace type, furnace, etc., can solve the problems of self-tempering, decrease of steam film cooling capacity, deformation accuracy, etc., to reduce the impact of hardness, reduce impact, and reduce deformation volume effect

Pending Publication Date: 2022-03-25
ZHEJIANG UNIV OF TECH
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of deformation and precision in conventional heat treatment methods, the self-tempering problem of liquid nitrogen multi-directional cooling method, and the problem that the water cooling method will produce a steam film and cause a decrease in cooling capacity

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
  • Multi-phase cooling method and device for bearing surface laser quenching
  • Multi-phase cooling method and device for bearing surface laser quenching
  • Multi-phase cooling method and device for bearing surface laser quenching

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: The metal block is made of copper, the coolant is water, and the inert gas is nitrogen.

[0022] Such as figure 1 As shown, a cooling device for laser quenching of the bearing surface can be used for laser quenching cooling of the inner raceway of the bearing, including a bearing 4 , a nozzle 7 , and a heat-conducting copper block 22 . Wherein the heat-conducting copper block 22 is fixed on the workbench 14 through the pillar 13, and the height of the workbench is adjusted so as to keep the contact between the copper block and the bearing; The valve 20, the main water inlet pipe 15, and the copper block water outlet pipe 10 are connected to form a circulating waterway, so that the heat-conducting copper block can be continuously cooled; the laser is fixed, the laser spot irradiation position 26 is fixed, and the bearing is driven to rotate by the turntable , forming a relative rotational movement with the heating spot; the spray head 7 is fixed on the sup...

Embodiment 2

[0024] Embodiment 2: The metal block is made of copper, the coolant is water, and the inert gas is nitrogen.

[0025] A cooling device for laser quenching of the bearing surface, such as figure 2As shown, it can be used for laser quenching and cooling of bearing outer raceway. Its structure and embodiment are substantially the same as those in Example 1, but the installation positions of the spray head 7 and the like are different. The laser irradiation position 26 is located on the outer raceway of the bearing. The water mist and nitrogen gas sprayed from the nozzle 7 cool the quenching area. At the same time, the heat-conducting copper block that is in contact with the bearing on three sides can increase the speed of the bearing’s heat transfer to the outside, thereby reducing the heating area. The closed-loop control composed of the controller 29, the temperature sensor 28 and the pump 19 can ensure the stability of the cooling process, thereby ensuring the uniformity of ...

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 multiphase cooling method and device for bearing surface laser quenching, and the multiphase cooling device comprises a gas generation device, a liquid circulation generation device, a working table, four supporting columns, a heat conduction metal block, a supporting plate, a spring, a screw rod and a spray head, the heat conduction metal block is supported on the working table through the four supporting columns; a mounting groove matched with the bearing is formed in the heat-conducting metal block, a liquid inlet and a liquid outlet are formed in the two sides of the heat-conducting metal block, the spray head is mounted on the supporting plate through a screw rod, the stud is sleeved with a spring, the supporting plate is fixed to the mounting groove of the heat-conducting metal block through a bolt, and a liquid spraying opening of the spray head right faces the bearing penetrating through the mounting groove; by adopting the cooling mode and the device, a fine structure can be obtained, and the influence of decarburization and oxidation on the surface of the hardening layer and self-tempering of the bearing on the hardness of the hardening layer is reduced, so that the hardness distribution of the hardening layer on the surface is more uniform, and the hardness is improved; a hardening layer with a more uniform bottom is obtained; and the overall deformation of the bearing is effectively reduced.

Description

technical field [0001] The invention relates to the field of bearing processing devices, in particular to a multiphase cooling method and device for laser quenching of bearing surfaces. Background technique [0002] Bearings are mainly used to support the rotary motion of the shaft, and require high dimensional accuracy and surface hardness. Generally, the surface of large-scale bearings is treated by high-frequency quenching, but the deformation after induction quenching heat treatment is relatively large, and self-tempering is prone to occur, thereby reducing the surface hardness. [0003] Laser quenching is a quenching technology that uses laser to heat the surface of the material above the phase transition point, and then cools it rapidly to harden the material phase transition. It has the characteristics of high surface hardness, small deformation of the workpiece, high processing accuracy, and no pollution in the processing process. However, the hardened layer obtaine...

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): C21D1/667C21D1/09C21D9/40C21D11/00
CPCC21D1/667C21D1/09C21D9/0062C21D9/40C21D11/005Y02P10/25
Inventor 陈智君张群莉姚建华张坤
Owner ZHEJIANG UNIV OF TECH
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

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com