JPS5756134A - Piston for enclosed compressor - Google Patents
Piston for enclosed compressorInfo
- Publication number
- JPS5756134A JPS5756134A JP13048380A JP13048380A JPS5756134A JP S5756134 A JPS5756134 A JP S5756134A JP 13048380 A JP13048380 A JP 13048380A JP 13048380 A JP13048380 A JP 13048380A JP S5756134 A JPS5756134 A JP S5756134A
- Authority
- JP
- Japan
- Prior art keywords
- piston
- thickness
- wall
- punch
- forming chamber
- 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.)
- Pending
Links
Landscapes
- Compressor (AREA)
- Forging (AREA)
Abstract
PURPOSE: To stabilize the function of piston and, at the same time, to prevent loss in volume due to deformation of the piston body, by thiciening the thickness of the wall at the top of piston than that of circumferential wall, when bottomed cylindrical pistons to be used for enclosed compressors are manufactured.
CONSTITUTION: A discoidal blank material 13 made of steel is put in a piston forming chamber 12 of a metallic mold 9 composed of die 11 set on the heat resisting plate 10, after the material 13 is treated by annealing and lubricating. Then, a pressure punch 14b is advanveced under pressure. When the punch 14b is advanced, plastic deformation is generated in the material 13, and the material 13 is expanded through the clearance between the pressure punch 14b, and the piston forming chamber 12. When the pressing is completed, a cylindrical piston body 4 having a circumferential wall of t2 thickness and a top wall of t1 thickness which is 1.5W3times as large as t2, is formed in one body by cold forging. Since the thickness of the top wall is thick, the piston body 4 will not be deformed during the course of operation and a stable operation can be expected. Moreover, no loss in volume based on the increase of volume required for compression occurs.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13048380A JPS5756134A (en) | 1980-09-19 | 1980-09-19 | Piston for enclosed compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13048380A JPS5756134A (en) | 1980-09-19 | 1980-09-19 | Piston for enclosed compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5756134A true JPS5756134A (en) | 1982-04-03 |
Family
ID=15035325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13048380A Pending JPS5756134A (en) | 1980-09-19 | 1980-09-19 | Piston for enclosed compressor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5756134A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5985343A (en) * | 1982-11-05 | 1984-05-17 | Aida Eng Ltd | Manufacture of piston member used for compressor for refrigerator |
| JPS62240132A (en) * | 1986-04-14 | 1987-10-20 | Yanai Seiko Kk | Manufacture of small-sized piston |
| JPH02128320A (en) * | 1988-11-07 | 1990-05-16 | Matsushita Electric Ind Co Ltd | Method and device for producing magnetic recording medium |
-
1980
- 1980-09-19 JP JP13048380A patent/JPS5756134A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5985343A (en) * | 1982-11-05 | 1984-05-17 | Aida Eng Ltd | Manufacture of piston member used for compressor for refrigerator |
| JPS62240132A (en) * | 1986-04-14 | 1987-10-20 | Yanai Seiko Kk | Manufacture of small-sized piston |
| JPH02128320A (en) * | 1988-11-07 | 1990-05-16 | Matsushita Electric Ind Co Ltd | Method and device for producing magnetic recording medium |
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