JPS5633215A - Twist drill - Google Patents
Twist drillInfo
- Publication number
- JPS5633215A JPS5633215A JP10745479A JP10745479A JPS5633215A JP S5633215 A JPS5633215 A JP S5633215A JP 10745479 A JP10745479 A JP 10745479A JP 10745479 A JP10745479 A JP 10745479A JP S5633215 A JPS5633215 A JP S5633215A
- Authority
- JP
- Japan
- Prior art keywords
- twisted grooves
- chips
- twisted
- grooves
- drill
- 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
Abstract
PURPOSE: To remove chips smoothly as well as to prevent the vibration when a work is cut by a method wherein the torsional rigidity of a drill is increased.
CONSTITUTION: A drill with twisted grooves is formed so that the walls 4 of the twisted grooves 2 which are located on the forward side in a rotating direction are expanded from the front cutting edges toward the ends of the twisted grooves 2 and the sectional area of the twisted grooves is decreased gradually from near the front cutting edges toward the ends of the twisted grooves. Since the twisted grooves are formed in the said way, the chips which appear in cutting are lifted along the twisted grooves. Though the chips are thick, excessively curled, broken in pieces, they are removed without difficulty.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10745479A JPS5633215A (en) | 1979-08-22 | 1979-08-22 | Twist drill |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10745479A JPS5633215A (en) | 1979-08-22 | 1979-08-22 | Twist drill |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5633215A true JPS5633215A (en) | 1981-04-03 |
Family
ID=14459567
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10745479A Pending JPS5633215A (en) | 1979-08-22 | 1979-08-22 | Twist drill |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5633215A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6025608A (en) * | 1983-07-19 | 1985-02-08 | Masao Kubota | Twist drill |
-
1979
- 1979-08-22 JP JP10745479A patent/JPS5633215A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6025608A (en) * | 1983-07-19 | 1985-02-08 | Masao Kubota | Twist drill |
JPS625727B2 (en) * | 1983-07-19 | 1987-02-06 | Masao Kubota |
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