GB938923A - A method for cold-working metals - Google Patents
A method for cold-working metalsInfo
- Publication number
- GB938923A GB938923A GB383360A GB383360A GB938923A GB 938923 A GB938923 A GB 938923A GB 383360 A GB383360 A GB 383360A GB 383360 A GB383360 A GB 383360A GB 938923 A GB938923 A GB 938923A
- Authority
- GB
- United Kingdom
- Prior art keywords
- polyvinyl acetate
- lubricant
- trichlorethylene
- cold
- solution
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
- B21D22/201—Work-pieces; preparation of the work-pieces, e.g. lubricating, coating
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lubricants (AREA)
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
Abstract
A method for cold working metals is characterized by the combination involving applying to the metal surface a solution of polyvinyl acetate in trichlorethylene, the polyvinyl acetate having an average molecular weight of 30,000 to 70,000, evaporating the trichlorethylene, heating the polyvinyl acetate layer to a temperature above its softening point e.g. 150 DEG -200 DEG C. for 5-10 minutes, applying a lubricant on the polyvinyl acetate layer, subjecting the metal to the desired cold working process, and treating the cold worked object with trichlorethylene to remove the polyvinyl acetate and the lubricant from the metal surface. The solution of polyvinyl acetate is applied by dipping, spraying or rolling. Mineral, animal or vegetable fats and oils or soaps of higher fatty acids, e.g. calcium stearate and aluminium, naphtenate mixed with an oil are used as a lubricant. After the cold working the objects are placed in vapour generated by boiling trichorethylene the vapour condensing on the cold object to dissolve and so remove the plastic coating and lubricant. In an example polished saucepans are manufactured from blanks punched from a sheet of stainless metal the blanks having been dipped in a 10% solution of polyvinyl acetate (molecular weight 60,000) in trichlorethylene. The plastic coating is heat treated at 160 DEG C., coated with a viscid chlorinated paraffin and deep drawn. Finally the coating and lubricant are removed.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE115959 | 1959-02-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB938923A true GB938923A (en) | 1963-10-09 |
Family
ID=20257688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB383360A Expired GB938923A (en) | 1959-02-06 | 1960-02-03 | A method for cold-working metals |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB938923A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5049019A (en) * | 1979-12-08 | 1991-09-17 | Cmb Foodcan Plc | Methods of making containers |
| CN116900120A (en) * | 2023-09-06 | 2023-10-20 | 江苏中佰纳米新材料科技有限公司 | Flexible automatic manufacturing equipment for metal plates |
-
1960
- 1960-02-03 GB GB383360A patent/GB938923A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5049019A (en) * | 1979-12-08 | 1991-09-17 | Cmb Foodcan Plc | Methods of making containers |
| CN116900120A (en) * | 2023-09-06 | 2023-10-20 | 江苏中佰纳米新材料科技有限公司 | Flexible automatic manufacturing equipment for metal plates |
| CN116900120B (en) * | 2023-09-06 | 2023-12-05 | 江苏中佰纳米新材料科技有限公司 | Flexible automatic manufacturing equipment for metal plates |
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