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

Mold heat treatment technology preventing cold stamping mold failure

A technology of cold stamping and mold, which is applied in the field of mold heat treatment process to prevent the failure of cold stamping molds. It can solve the problems of failing to form qualified fastener products, affecting the production plan of enterprises, and wear and tear, so as to improve hardness and avoid early fracture. , The effect of eliminating residual stress

Inactive Publication Date: 2017-02-01
YAAN FANHUA TOOLING MOLD CO LTD
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 2. Deformation
[0006] 3. Wear and tear
[0007] When the mold parts have the above-mentioned defects, qualified fastener products cannot be formed, which will inevitably affect the production plan of the enterprise.

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 1

[0020] A mold heat treatment process for preventing failure of a cold stamping die, comprising the steps of:

[0021] (1) Tempering is carried out within half an hour after the cold stamping die blank is forged to refine grains and eliminate stress. The tempering temperature is 450-460°C, and the tempering holding time is 90-100 minutes;

[0022] (2) Quenching, quickly drop to 80-120°C within 5-10 minutes after tempering is completed;

[0023] (3) Repeat steps (1) and (2) 5-6 times, and quickly drop to room temperature within 5-10 minutes after the last tempering is completed.

[0024] The hardness of the obtained cold stamping die is increased by 20%, the wear resistance is increased by 45%, and the fatigue resistance is increased by 34%.

Embodiment 2

[0026] A mold heat treatment process for preventing failure of a cold stamping die, comprising the steps of:

[0027] (1) Tempering is carried out within half an hour after the cold stamping die blank is forged to refine grains and eliminate stress. The tempering temperature is 460-470°C, and the tempering holding time is 80-90 minutes;

[0028] (2) Quenching, quickly drop to 80-120°C within 5-10 minutes after tempering is completed;

[0029] (3) Repeat steps (1) and (2) 5-6 times, and quickly drop to room temperature within 5-10 minutes after the last tempering is completed.

[0030] The hardness of the obtained cold stamping die is increased by 25%, the wear resistance is increased by 47%, and the fatigue resistance is increased by 32%.

Embodiment 3

[0032] A mold heat treatment process for preventing failure of a cold stamping die, comprising the steps of:

[0033] (1) Tempering is carried out within half an hour after the cold stamping die blank is forged to refine grains and eliminate stress. The tempering temperature is 480-500°C, and the tempering holding time is 70-80 minutes;

[0034] (2) Quenching, quickly drop to 80-120°C within 5-10 minutes after tempering is completed;

[0035] (3) Repeat steps (1) and (2) 5-6 times, and quickly drop to room temperature within 5-10 minutes after the last tempering is completed.

[0036] The hardness of the obtained cold stamping die is increased by 27%, the wear resistance is increased by 48%, and the fatigue resistance is increased by 30%.

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 mold heat treatment technology preventing cold stamping mold failure and relates to the field of stamping forming. The mold heat treatment technology comprises the following steps of tempering a cold stamping mold blank at 450-500 DEG C within half an hour after forging to refine grains and relieve stress, performing quenching to rapidly reduce the temperature to 80-120 DEG C within 5-10min after tempering, repeating the steps 5-6, and rapidly reducing to the room temperature within 5-10min after the last tempering, wherein the heat preservation period of the tempering is 70-100min. The technology strictly controls the time and the temperature of the tempering and the quenching, and can improve hardness, abrasive resistance and fatigue resistance of a mold by an incomplete quenching manner; multiple tempering can effectively eliminate residual stress in a quenching process; the toughness of the mold is improved, and early breakage is avoided.

Description

technical field [0001] The invention relates to the field of stamping forming processing, and more specifically relates to a die heat treatment process for preventing cold stamping die from failure. Background technique [0002] The quality of the cold stamping die will directly affect the quality of its products, and the life of the die determines the production cost and economic benefits of the parts. For molds with early failures, there are mainly three failure types as follows: (1) Fracture failure: including plastic fracture failure, fatigue fracture failure, creep fracture failure, and low stress brittle failure. ⑵Deformation failure: including excessive elastic and plastic deformation failure. (3) Surface damage failure: including wear failure, corrosion failure, surface fatigue (pitting or peeling) failure, etc. [0003] Harsh working conditions make the service life of cold stamping dies much shorter than other dies. Therefore, in order to prolong the service lif...

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): C21D1/18C21D9/00
CPCC21D1/18C21D9/0068
Inventor 王晓芳
Owner YAAN FANHUA TOOLING MOLD CO LTD
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