GB1491352A - Process for core or complete drilling and drilling head especially for performing the process - Google Patents
Process for core or complete drilling and drilling head especially for performing the processInfo
- Publication number
- GB1491352A GB1491352A GB2302/75A GB230275A GB1491352A GB 1491352 A GB1491352 A GB 1491352A GB 2302/75 A GB2302/75 A GB 2302/75A GB 230275 A GB230275 A GB 230275A GB 1491352 A GB1491352 A GB 1491352A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cutting
- insert
- inserts
- bit
- corner
- 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
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/04—Drills for trepanning
- B23B51/0466—Drills for trepanning with exchangeable cutting inserts, e.g. able to be clamped
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/06—Drills with lubricating or cooling equipment
- B23B51/063—Deep hole drills, e.g. ejector drills
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling Tools (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Earth Drilling (AREA)
Abstract
1491352 Boring earth &c. FRIED KRUPP HUTTENWERKE AG 20 Jan 1975 [29 Jan 1974] 2302/75 Heading E1F A rotary drill bit has at least one cutting system consisting of a pair of cutting elements arranged so that one corner of each of the cutting elements makes a cut across the central region of the cut produced by the other cutting element. As described a core bit has a pair of triangular inserts 4, 5 which are clamped to the body of the bit by clamps 6, 7, the inserts having three cutting edges, each of which can be brought into an operative position as the others become blunted. The bit is also provided with hard metal supports 12, 13 which bear against the wall of the hole being drilled. The inserts 4, 5 (Fig. 3) are arranged so that the corner 17 of insert 4 projects beyond the centre of cutting edge 15 of insert 5, and so that the corner 16 of insert 5 projects beyond the centre of cutting edge 14 of insert 4. In this way the cut is divided into four zones I to IV (Fig. 7) which reduces the size of the shavings to facilitate the removal of debris by the flushing medium. In a modification (not shown) the cutting inserts may be of rectangular or trapezoidal shape. The invention may also be applied to full drill bits, in which case more than one such cutting system may be necessary.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19742404029 DE2404029C3 (en) | 1974-01-29 | Method and drill head for core or full drilling of a workpiece from a machinable material deposit |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1491352A true GB1491352A (en) | 1977-11-09 |
Family
ID=5905898
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2302/75A Expired GB1491352A (en) | 1974-01-29 | 1975-01-20 | Process for core or complete drilling and drilling head especially for performing the process |
Country Status (9)
Country | Link |
---|---|
BE (1) | BE821729A (en) |
DK (1) | DK617574A (en) |
ES (1) | ES431221A1 (en) |
FR (1) | FR2258922B1 (en) |
GB (1) | GB1491352A (en) |
IT (1) | IT1023099B (en) |
LU (1) | LU71215A1 (en) |
NL (1) | NL164776C (en) |
SE (1) | SE415289B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE411310B (en) * | 1976-11-17 | 1979-12-17 | Sandvik Ab | DRILL, PREFERABLY WITH FRIENDS |
DE4242910A1 (en) * | 1992-12-18 | 1994-06-23 | Hilti Ag | Core bit with cross-section reinforcements |
-
1974
- 1974-10-16 NL NL7413592.A patent/NL164776C/en not_active IP Right Cessation
- 1974-10-22 ES ES431221A patent/ES431221A1/en not_active Expired
- 1974-10-30 LU LU71215A patent/LU71215A1/xx unknown
- 1974-10-31 BE BE150097A patent/BE821729A/en not_active IP Right Cessation
- 1974-11-06 IT IT53895/74A patent/IT1023099B/en active
- 1974-11-28 DK DK617574A patent/DK617574A/da not_active Application Discontinuation
- 1974-11-29 FR FR7439123A patent/FR2258922B1/fr not_active Expired
-
1975
- 1975-01-20 GB GB2302/75A patent/GB1491352A/en not_active Expired
- 1975-01-28 SE SE7500883A patent/SE415289B/en unknown
Also Published As
Publication number | Publication date |
---|---|
LU71215A1 (en) | 1975-04-17 |
SE7500883L (en) | 1975-07-30 |
NL164776B (en) | 1980-09-15 |
NL164776C (en) | 1981-02-16 |
ES431221A1 (en) | 1976-11-01 |
DE2404029A1 (en) | 1975-08-07 |
DK617574A (en) | 1975-09-22 |
FR2258922A1 (en) | 1975-08-22 |
DE2404029B2 (en) | 1976-11-04 |
IT1023099B (en) | 1978-05-10 |
NL7413592A (en) | 1975-07-31 |
FR2258922B1 (en) | 1980-11-14 |
SE415289B (en) | 1980-09-22 |
BE821729A (en) | 1975-02-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
PCNP | Patent ceased through non-payment of renewal fee |