JPS6487722A - Electric induction hardening method for large-sized rack - Google Patents
Electric induction hardening method for large-sized rackInfo
- Publication number
- JPS6487722A JPS6487722A JP62244809A JP24480987A JPS6487722A JP S6487722 A JPS6487722 A JP S6487722A JP 62244809 A JP62244809 A JP 62244809A JP 24480987 A JP24480987 A JP 24480987A JP S6487722 A JPS6487722 A JP S6487722A
- Authority
- JP
- Japan
- Prior art keywords
- rack
- cooling liquid
- sized
- sized rack
- face
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Heat Treatment Of Articles (AREA)
Abstract
PURPOSE:To form continuous hardened layers to a large-sized rack over the entire tooth thereof by covering the non-hardening part of the large-sized rack with metallic blocks and heating the rack by high-frequency current, then injecting a cooling liquid to the non-heated part in the cooling liquid. CONSTITUTION:The blocks 15a, 15b which are made of thick metal plates and have an approximately L-shaped section are mounted on the top face 4 and bottom face 5 of the large-sized rack in tight contact therewith to cover the non-hardening part. The high-frequency current is supplied to a coil to preheat and heat the rack part 2 and to minimize the temp. difference between tips 2a and bottoms 2b. The large-sized rack 1 is then immersed into the cooling liquid 33 where the cooling liquid 33 is injected to the rack part 2 and a rear face part 3 from a front face cooling jacket 31 and a rear face cooling jacket 32. The strains such as deformation and bend of the rack 1 are thereby decreased and the tips 2, the bottoms 2b and the tooth faces are adequately heated and cooled, by which the uniform hardened layers are formed thereon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62244809A JPS6487722A (en) | 1987-09-29 | 1987-09-29 | Electric induction hardening method for large-sized rack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62244809A JPS6487722A (en) | 1987-09-29 | 1987-09-29 | Electric induction hardening method for large-sized rack |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6487722A true JPS6487722A (en) | 1989-03-31 |
| JPH0227410B2 JPH0227410B2 (en) | 1990-06-18 |
Family
ID=17124268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62244809A Granted JPS6487722A (en) | 1987-09-29 | 1987-09-29 | Electric induction hardening method for large-sized rack |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6487722A (en) |
-
1987
- 1987-09-29 JP JP62244809A patent/JPS6487722A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0227410B2 (en) | 1990-06-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |