GB812676A - Process and tool for decreasing the internal diameter of a cylindrical bore - Google Patents
Process and tool for decreasing the internal diameter of a cylindrical boreInfo
- Publication number
- GB812676A GB812676A GB32911/57A GB3291157A GB812676A GB 812676 A GB812676 A GB 812676A GB 32911/57 A GB32911/57 A GB 32911/57A GB 3291157 A GB3291157 A GB 3291157A GB 812676 A GB812676 A GB 812676A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tool
- bore
- indentation
- diameter
- groove
- 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
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P6/00—Restoring or reconditioning objects
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
812,676. Re-working valve guides etc.; rolling. CHAMPIGNY, P. Oct. 22, 1957, No. 32911/57. Classes 83 (2) and 83 (4). A process for decreasing the internal diameter of a cylindrical bore such as a valve guide, comprises forming a helical groove in the internal surface by a rolling operation which produces inwardly-projecting helical ridges. The main tool A consists of a rod 1 with an extension 3 of reduced diameter in which is formed a recess 5 adapted to receive a discshaped roll 10 and axial stems 11 journalled in shallow end portions 7 and 8, one stem being held in the seating by a circlip inserted in the annular groove 13 and the other stem by bending the walls of the recess portion 8 to form lips 14. An initial indentation in the bore is made by a tool B comprising a cylindrical body 16, with a semi-cylindrical groove 17 in which is mounted a short rod of hard metal 20 having substantially the same diameter as the roll 10. The indentation is made by a hammer blow on the handle 15. The square head of the tool A is then inserted in the bore D and the tool pulled through until the wheel 10 engages the indentation 23 when a rotating device is fitted to the square head to enable the helical groove 25 to be formed. After-the rolling operation the ridges 26 are machined and polished to the required diameter and finish.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB812676A true GB812676A (en) | 1959-04-29 |
Family
ID=1743224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB32911/57A Expired GB812676A (en) | 1957-10-22 | Process and tool for decreasing the internal diameter of a cylindrical bore |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB812676A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4245489A (en) * | 1979-02-27 | 1981-01-20 | Sunnen Products Company | Knurling tool |
| GB2310249A (en) * | 1996-02-13 | 1997-08-20 | Rover Group | I.c.engine poppet valve and valve guide |
-
1957
- 1957-10-22 GB GB32911/57A patent/GB812676A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4245489A (en) * | 1979-02-27 | 1981-01-20 | Sunnen Products Company | Knurling tool |
| DK154874B (en) * | 1979-02-27 | 1989-01-02 | Sunnen Products Co | ROULETTE TOOLS |
| GB2310249A (en) * | 1996-02-13 | 1997-08-20 | Rover Group | I.c.engine poppet valve and valve guide |
| GB2310249B (en) * | 1996-02-13 | 1999-09-08 | Rover Group | A valve and valve guide assembly for an internal combustion engine |
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