CA2000054C - Drilling device for producing drill holes with an undercut - Google Patents
Drilling device for producing drill holes with an undercutInfo
- Publication number
- CA2000054C CA2000054C CA002000054A CA2000054A CA2000054C CA 2000054 C CA2000054 C CA 2000054C CA 002000054 A CA002000054 A CA 002000054A CA 2000054 A CA2000054 A CA 2000054A CA 2000054 C CA2000054 C CA 2000054C
- Authority
- CA
- Canada
- Prior art keywords
- drill bit
- drill
- stem
- drilling device
- suction
- 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 - Fee Related
Links
Classifications
-
- 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
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/0009—Energy-transferring means or control lines for movable machine parts; Control panels or boxes; Control parts
- B23Q1/0018—Energy-transferring means or control lines for movable machine parts; Control panels or boxes; Control parts comprising hydraulic means
- B23Q1/0027—Energy-transferring means or control lines for movable machine parts; Control panels or boxes; Control parts comprising hydraulic means between moving parts between which an uninterrupted energy-transfer connection is maintained
- B23Q1/0036—Energy-transferring means or control lines for movable machine parts; Control panels or boxes; Control parts comprising hydraulic means between moving parts between which an uninterrupted energy-transfer connection is maintained one of those parts being a tool
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/0018—Drills for enlarging a hole
- B23B51/0027—Drills for enlarging a hole by tool swivelling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/0042—Devices for removing chips
- B23Q11/0046—Devices for removing chips by sucking
Abstract
A drilling device for producing drill holes with undercuts and comprising a drill bit, a drill bit holder for receiving the drill bit and having a suction chamber, and a suction bell surrounding the drill bit holder and communi-cating with the suction chamber therein, the stem of the drill bit having a continuous axial bore communicating with the suction chamber and a plurality of slots arranged in a region of a cross-sectional enlargement of the stem.
Description
The invention relates to a drillin~ device for producing drill holes with an undercut and comprisiny a drill bit attached to a drill bit holder and a suction bell.
German Offenle~un~sschrlft 33 40 090 discloses a drillin~ device of the type mentioned in which a drill bit can be screwed into a drill bit holder. A suction bell is provided in the re~ion of the drill bit holder. The suction bell surrounds the drill bit holder and the drill bit stem.
The suction bell is a~tached with a suction hose to a suction fan of a drlllin~ machin~ or similar apparatus. The ~urpose of the suction device is to suck off the drilling dust accumulating in the drill hole during the drilling operation.
In this known device, the drill ~it stem is ~uided with a lateral play in a suction sl~eve so that the drill bit is pivotable within the suction sleeve. The pivotal movement enablcs to produce the undercut at the bottom of the drilI
hole.
~letal expansible ~iXill~ plu~5 can be inserted in a drill hole with an undercut. They e~pand in the re~ion of the undercut and are, thus, anchored ~,ositively in the drill hole.
To produce an undercut at the bottom of the drill hole that is as accura~e as l-~ssible, the pivotal movement of the drill bit has to be limited. This can be achieved by providing in the middle of the drill bit stem a 1 cross-sectional enlar-3ement which serves as a ~ivot bearing that engages the wall of the drill hole. The cross-sectional enlargement, however, makes it difficult to suck off the drilling dust, since there is only a small gap left clear in the rcgion of the cross-sectional enlargement for suckinc~ the drilling dust away.
;a~ows~ ' The object of the invention is to provide a drilling device for producing drill holes with an undercut and having a suction device which is of a simple construction and permits the drilling dust to be sucked away at the drill bit tip. The object o~ the invention is achieved by providing in the drill bit stem a continuous axial bore which o~ens into a suction chamber of the drill bit holder, and slots in the region of the cross-sectional enlargement of the drill bit stem. The continu,ous axial bore enables the drilling dust to be sucked away directly at the drill bit tip. The slots ~rmit the volume o~ air sucked away to flow back. The slots additional-ly have the advantage that they prevent the drill stem from jammin~ in the drill hole. When the drilling device is provided with a smooth drill bit stem and a drill bit stem enlargement, which corresponcls aproximately to the diameter of the drill head, the drill bit frequently jams, as test drillings have shown.
r~he drill bit preferably has a thread end portion ZO with which it is screwed into the drill bit holder having a suction chamber surrounded by a tubular suction bell. The suction bell preferably includes a tube portion with a la~erally projectincJ suction nozzle to which a suction hose o~
a suction pump can be attached in a manner known per se. The 2S ~ube portion of the suction bell is held in a very simple 200Q~54 1 mann~r between two flanges provided, respectively, on the drill bit holder and on the drill bit stem. The flange formed on the ~rill bit stem serves, at the same time, as a stop that determine the maximum depth of the drill hole.
The slots formed on the drill bit stem, are about 1 to 2 cm lon~ and, pre~erably, have a pitch such that they convey the drilling dust acc~nulatiny in this rec3ion towards the drill head. The pitch of the slots may, al~ernatively, howevcr, be such that the slots alternate opposite to each other or are of ~he same shape, as in the case of drilling dust grooves, if this is required for special a~plications.
,he slots serve both as air inlet channels and also for further transport of the drilling dust accumulatin~ in this region.
lo mount the drill plate in the drill head in an optimum manner, it is advantageous to extend the continuous bore laterally past the drill plate at a distance therefrom.
.he drill plate can thus be inserted in a groove provided in the solid part of the drill head.
It is especially advantagcous to branch the continuous borc in the region of the drill head, so that on each side of the drill plat~ a branch o~ the continuous bore leads to a suction openin~. This can also be regarded as a ~orkin~ of the continuous bore. The two suction openings obtained thereby ljennit th~ accumulat~d drilling dust to be ~ Z000054 1 sucked away directly on both sides of the drill plate.
The present invention bo~h as to its construction so to its mode of operation, together with additional objects and advantages thereof, will be best understood from the following descri~tion of the preferred em~odiment with reference to the accompanying drawin~3s.
FIG. la shows an elevation view of a drill bit holder of a drilling device according to the invention;
FIG. lb shows an elevation view of a drill bit of a drilling device according to the invention;
FIG. lc shows a partially cross-sectional view of a suction bell of a drilling device according to the invention;
FIG. 2 shows a partial cross-sectional view of the drill bit holder shown in FIG. l;
lo FIG. 3a shows a partial elevation view of the drill bit with a branched or forked continuous bore; and FIG. 3b shows a bottom view of the drill bit.
~ .
.. - 7 -B
The drilling device of the present invention comprises a drill bit holder 1, a drill bit 2, and a suction bell 3. The drill bit holder 1 has a mounting shank 4 with which it can ~e clampecl in a drill chuck or similar part of a drilling machlne. In addition, the drill hit holder 1 has a suction chamber 5 onto which the suction bell 3 can be pushed from beneath. An opening 6 connects the suction chamber 5 with the inner chamber 7 o~ the suction ~ell 3.
A bore 8 which is provided at the lower end o~ the drill bit holder 1 and forms the suction chamber, has an internal thread 9 shown in FIG. 2.
The drill bit 2 has a threaded end portion 10 with which it can be screwed into the internal thread 9. Prior to this, however, the suction bell 3 is pushed over the suction chamber 5. A flange 11 ~ormed on the drill bit holder 1, and a flange 12 formed on the drill bit 2, close the suction bell 3 at its two end faces.
The drill hit 2 comprises a smooth stem 13 provided with.slots 14 distributed around its periphery. The slots 14 are locat~d in a rec~ion where the cross-section of ~he stem is c3reatest~ and serve as external air channels and as reamincJ elements which prevent the drill bit from becomin~ jammed in the drill hole. The slots 14 could also be arranged to extend at an acute angle relative to ~ ` 2000054 1 the longitudinal axis of the drill bit. The slots may have a pitch corresponding to the pitch drilling dust grooves.
The grooves can, however, also have a pitch such that the drilling dust accumulating in this region, is conveyed in the direction of the drill head 15.
- The drill bit 2 has a continuous axial bore 16 shown in the drawing by broken lines. The continuous bore 16 has its smallest diameter in the region of the drill head 15 and adjacent to the drill head region, where the diameter of the stem is smallest. In the region where the cross-section of the stem widens, the continuous bore 16 likewise has a larger diameter, whereby a considerable improvement in the suction of the drilling dust is achieved. The suction chamber 5 has a diameter larger than the larger diameter of the bore 16, and opens into the suction bell 3 by means of openings 6. Thus, the suction bore has a flow cross-section that increases continuously from the drill head tip. This results in optimum suction of the drilling dust.
The suction bell 3 hasa laterally projecting suction- nozzle 17 to which a suction hose (not shown) of a suction pump can be attached in a manner known per se.
Lateral cutting edges 18, 19 of a drill plate 20 which project laterally from the drill head 15, serve to produce an undercut in a drill hole. The maximum drill head diameter is determined by the lateral cutting edges 18, 19.
_ g _ A
, .~
~ - 2000054 1 The maximum drill head diameter is only slightly larger than the maximum cross-sectional enlargement in the region 21 of the drill stem. The cross-sectional enlargement of the drill stem serves as a pivot bearing, which provides for a predetermined swinging of the drill head 15 at the bottom of the drill hole to form an undercut. As can be seen in FIG. 5, he tapering surface extending from the cross-sectional enlargement of the bit stem limits (defines) the size of the undercut. The enlarged region 21 engages the drill hole wall during this operation. ~
F~G. 3a shows the drill bit 2 in the region of the drill head 15. The continuous bore 16 forks and extends to suction openings 22 formed on both sides of the drill plate 20 mounted at the front end of the drill head 15. For this purpose, inside the drill head 15, straight channels 23 are formed. The channels converge in the drill stem.
The drill head 15 shown in FIG. 3, flares conically.
However, it is also possible to form the drill head as a straight shank part, as shown in FIG. 1. In the case of the conically flared drill head, it is possible, however, to provide larger suction openings 22 than in a straight drill head of a smaller diameter.
While the invention has been illustrated and described as embodied in a drilling device for producing drill holes, with an undercut, it is not intended to be limited to A, - 10 -.. -. ., , :
~ ` 2000054 1 the details shown, since various modifications and structural changes may be made without departing in any way from the spirit of the present invention.
Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can, by applying current knowledge, readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention.
What is claimed as new and desired to be protected by Letters Patent is set forth in the appended claims.
German Offenle~un~sschrlft 33 40 090 discloses a drillin~ device of the type mentioned in which a drill bit can be screwed into a drill bit holder. A suction bell is provided in the re~ion of the drill bit holder. The suction bell surrounds the drill bit holder and the drill bit stem.
The suction bell is a~tached with a suction hose to a suction fan of a drlllin~ machin~ or similar apparatus. The ~urpose of the suction device is to suck off the drilling dust accumulating in the drill hole during the drilling operation.
In this known device, the drill ~it stem is ~uided with a lateral play in a suction sl~eve so that the drill bit is pivotable within the suction sleeve. The pivotal movement enablcs to produce the undercut at the bottom of the drilI
hole.
~letal expansible ~iXill~ plu~5 can be inserted in a drill hole with an undercut. They e~pand in the re~ion of the undercut and are, thus, anchored ~,ositively in the drill hole.
To produce an undercut at the bottom of the drill hole that is as accura~e as l-~ssible, the pivotal movement of the drill bit has to be limited. This can be achieved by providing in the middle of the drill bit stem a 1 cross-sectional enlar-3ement which serves as a ~ivot bearing that engages the wall of the drill hole. The cross-sectional enlargement, however, makes it difficult to suck off the drilling dust, since there is only a small gap left clear in the rcgion of the cross-sectional enlargement for suckinc~ the drilling dust away.
;a~ows~ ' The object of the invention is to provide a drilling device for producing drill holes with an undercut and having a suction device which is of a simple construction and permits the drilling dust to be sucked away at the drill bit tip. The object o~ the invention is achieved by providing in the drill bit stem a continuous axial bore which o~ens into a suction chamber of the drill bit holder, and slots in the region of the cross-sectional enlargement of the drill bit stem. The continu,ous axial bore enables the drilling dust to be sucked away directly at the drill bit tip. The slots ~rmit the volume o~ air sucked away to flow back. The slots additional-ly have the advantage that they prevent the drill stem from jammin~ in the drill hole. When the drilling device is provided with a smooth drill bit stem and a drill bit stem enlargement, which corresponcls aproximately to the diameter of the drill head, the drill bit frequently jams, as test drillings have shown.
r~he drill bit preferably has a thread end portion ZO with which it is screwed into the drill bit holder having a suction chamber surrounded by a tubular suction bell. The suction bell preferably includes a tube portion with a la~erally projectincJ suction nozzle to which a suction hose o~
a suction pump can be attached in a manner known per se. The 2S ~ube portion of the suction bell is held in a very simple 200Q~54 1 mann~r between two flanges provided, respectively, on the drill bit holder and on the drill bit stem. The flange formed on the ~rill bit stem serves, at the same time, as a stop that determine the maximum depth of the drill hole.
The slots formed on the drill bit stem, are about 1 to 2 cm lon~ and, pre~erably, have a pitch such that they convey the drilling dust acc~nulatiny in this rec3ion towards the drill head. The pitch of the slots may, al~ernatively, howevcr, be such that the slots alternate opposite to each other or are of ~he same shape, as in the case of drilling dust grooves, if this is required for special a~plications.
,he slots serve both as air inlet channels and also for further transport of the drilling dust accumulatin~ in this region.
lo mount the drill plate in the drill head in an optimum manner, it is advantageous to extend the continuous bore laterally past the drill plate at a distance therefrom.
.he drill plate can thus be inserted in a groove provided in the solid part of the drill head.
It is especially advantagcous to branch the continuous borc in the region of the drill head, so that on each side of the drill plat~ a branch o~ the continuous bore leads to a suction openin~. This can also be regarded as a ~orkin~ of the continuous bore. The two suction openings obtained thereby ljennit th~ accumulat~d drilling dust to be ~ Z000054 1 sucked away directly on both sides of the drill plate.
The present invention bo~h as to its construction so to its mode of operation, together with additional objects and advantages thereof, will be best understood from the following descri~tion of the preferred em~odiment with reference to the accompanying drawin~3s.
FIG. la shows an elevation view of a drill bit holder of a drilling device according to the invention;
FIG. lb shows an elevation view of a drill bit of a drilling device according to the invention;
FIG. lc shows a partially cross-sectional view of a suction bell of a drilling device according to the invention;
FIG. 2 shows a partial cross-sectional view of the drill bit holder shown in FIG. l;
lo FIG. 3a shows a partial elevation view of the drill bit with a branched or forked continuous bore; and FIG. 3b shows a bottom view of the drill bit.
~ .
.. - 7 -B
The drilling device of the present invention comprises a drill bit holder 1, a drill bit 2, and a suction bell 3. The drill bit holder 1 has a mounting shank 4 with which it can ~e clampecl in a drill chuck or similar part of a drilling machlne. In addition, the drill hit holder 1 has a suction chamber 5 onto which the suction bell 3 can be pushed from beneath. An opening 6 connects the suction chamber 5 with the inner chamber 7 o~ the suction ~ell 3.
A bore 8 which is provided at the lower end o~ the drill bit holder 1 and forms the suction chamber, has an internal thread 9 shown in FIG. 2.
The drill bit 2 has a threaded end portion 10 with which it can be screwed into the internal thread 9. Prior to this, however, the suction bell 3 is pushed over the suction chamber 5. A flange 11 ~ormed on the drill bit holder 1, and a flange 12 formed on the drill bit 2, close the suction bell 3 at its two end faces.
The drill hit 2 comprises a smooth stem 13 provided with.slots 14 distributed around its periphery. The slots 14 are locat~d in a rec~ion where the cross-section of ~he stem is c3reatest~ and serve as external air channels and as reamincJ elements which prevent the drill bit from becomin~ jammed in the drill hole. The slots 14 could also be arranged to extend at an acute angle relative to ~ ` 2000054 1 the longitudinal axis of the drill bit. The slots may have a pitch corresponding to the pitch drilling dust grooves.
The grooves can, however, also have a pitch such that the drilling dust accumulating in this region, is conveyed in the direction of the drill head 15.
- The drill bit 2 has a continuous axial bore 16 shown in the drawing by broken lines. The continuous bore 16 has its smallest diameter in the region of the drill head 15 and adjacent to the drill head region, where the diameter of the stem is smallest. In the region where the cross-section of the stem widens, the continuous bore 16 likewise has a larger diameter, whereby a considerable improvement in the suction of the drilling dust is achieved. The suction chamber 5 has a diameter larger than the larger diameter of the bore 16, and opens into the suction bell 3 by means of openings 6. Thus, the suction bore has a flow cross-section that increases continuously from the drill head tip. This results in optimum suction of the drilling dust.
The suction bell 3 hasa laterally projecting suction- nozzle 17 to which a suction hose (not shown) of a suction pump can be attached in a manner known per se.
Lateral cutting edges 18, 19 of a drill plate 20 which project laterally from the drill head 15, serve to produce an undercut in a drill hole. The maximum drill head diameter is determined by the lateral cutting edges 18, 19.
_ g _ A
, .~
~ - 2000054 1 The maximum drill head diameter is only slightly larger than the maximum cross-sectional enlargement in the region 21 of the drill stem. The cross-sectional enlargement of the drill stem serves as a pivot bearing, which provides for a predetermined swinging of the drill head 15 at the bottom of the drill hole to form an undercut. As can be seen in FIG. 5, he tapering surface extending from the cross-sectional enlargement of the bit stem limits (defines) the size of the undercut. The enlarged region 21 engages the drill hole wall during this operation. ~
F~G. 3a shows the drill bit 2 in the region of the drill head 15. The continuous bore 16 forks and extends to suction openings 22 formed on both sides of the drill plate 20 mounted at the front end of the drill head 15. For this purpose, inside the drill head 15, straight channels 23 are formed. The channels converge in the drill stem.
The drill head 15 shown in FIG. 3, flares conically.
However, it is also possible to form the drill head as a straight shank part, as shown in FIG. 1. In the case of the conically flared drill head, it is possible, however, to provide larger suction openings 22 than in a straight drill head of a smaller diameter.
While the invention has been illustrated and described as embodied in a drilling device for producing drill holes, with an undercut, it is not intended to be limited to A, - 10 -.. -. ., , :
~ ` 2000054 1 the details shown, since various modifications and structural changes may be made without departing in any way from the spirit of the present invention.
Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can, by applying current knowledge, readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention.
What is claimed as new and desired to be protected by Letters Patent is set forth in the appended claims.
Claims (7)
1. A drilling device for producing drill holes with an undercut, comprising a drill bit having a stem, a drill head arranged at an end of said stem, and a drill plate projecting from said drill head; a drill bit holder for receiving said drill bit and having a suction chamber; and a suction bell surrounding said drill bit holder and communicating with said suction chamber, said drill bit stem having a continuous axial bore communicating with said suction chamber, a cross-section enlargement for pivotally supporting said drill bit during forming an undercut, a tapering surface extending from said cross-sectional enlargement for limiting a size of the undercut, and a plurality of slots provided on said stem in a region of said cross-sectional enlargement.
2. A drilling device according to claim 1, wherein said slots extend at an acute angle to a longitudinal axis of said drill bit.
3. A drilling device according to claim 1, wherein said drill bit holder and said drill bit stem have opposite flanges, and said suction bell comprises a tube and a laterally projecting suction nozzle, said tube portion being mounted between said opposite flanges.
4. A drilling device according to claim 1, wherein said continuous bore has a small diameter in a region of the drill bit head and a larger diameter inside the drill bit stem.
5. A drilling device according to claim 1, wherein said drill bit has an end remote from the drill head and having a threaded portion which is screwed into said drill bit holder.
6. A drilling device according to claim 1, wherein said continuous bore extends laterally past said drill plate.
7. A drilling device according to claim 1, wherein said continuous bore forks in the region of said drill head and extends to suction openings on both sides of said drill plate.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3835025.4 | 1988-10-14 | ||
| DE3835025A DE3835025A1 (en) | 1988-10-14 | 1988-10-14 | DRILLING DEVICE FOR PRODUCING DRILL HOLES WITH UNDERCUT |
| DE3903369A DE3903369A1 (en) | 1988-10-14 | 1989-02-04 | DRILLING DEVICE FOR PRODUCING DRILL HOLES WITH UNDERCUT |
| DEP3903369.4 | 1989-02-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2000054A1 CA2000054A1 (en) | 1990-04-14 |
| CA2000054C true CA2000054C (en) | 1994-07-12 |
Family
ID=25873239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002000054A Expired - Fee Related CA2000054C (en) | 1988-10-14 | 1989-10-02 | Drilling device for producing drill holes with an undercut |
Country Status (19)
| Country | Link |
|---|---|
| EP (1) | EP0363617B1 (en) |
| JP (1) | JPH0686052B2 (en) |
| KR (1) | KR900006050A (en) |
| CN (1) | CN1019774B (en) |
| AU (1) | AU599862B2 (en) |
| BR (1) | BR8905212A (en) |
| CA (1) | CA2000054C (en) |
| CS (1) | CS277058B6 (en) |
| DE (2) | DE3903369A1 (en) |
| DK (1) | DK497689A (en) |
| ES (1) | ES2034536T3 (en) |
| FI (1) | FI894582A (en) |
| GR (1) | GR3005312T3 (en) |
| HU (1) | HU206651B (en) |
| NO (1) | NO894100L (en) |
| PL (1) | PL162191B1 (en) |
| PT (1) | PT91970B (en) |
| RU (1) | RU1829988C (en) |
| YU (1) | YU198789A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8360698B2 (en) | 2007-06-29 | 2013-01-29 | Okuma Corporation | Cutting method |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4014224A1 (en) * | 1990-05-04 | 1991-11-07 | Fischer Artur Werke Gmbh | DEVICE FOR PRODUCING DRILL HOLES WITH UNDERCUT |
| DE4132228A1 (en) * | 1991-09-27 | 1993-04-01 | Fischer Artur Werke Gmbh | DRILLING DEVICE FOR PRODUCING DRILL HOLES WITH UNDERCUT |
| CN104439397B (en) * | 2014-11-13 | 2017-03-29 | 贵州凯星液力传动机械有限公司 | A kind of processing method of High-precision Deep Hole composite drill |
| DE102017125898A1 (en) * | 2017-11-06 | 2019-05-09 | Drebo Werkzeugfabrik Gmbh | Rock drilling arrangement and rock drill |
| CN109719559B (en) * | 2019-01-29 | 2024-03-19 | 华工法利莱切焊系统工程有限公司 | Drilling scrap iron collecting system and steel plate machining center equipment |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR902101A (en) * | 1943-09-29 | 1945-08-20 | Schneider & Cie | Combination tool for metal drilling |
| DE1203660B (en) * | 1963-06-15 | 1965-10-21 | Duss Maschf | Dust seal on a device for vacuuming the cuttings for a drilling tool for stone processing |
| DE2349998C2 (en) * | 1973-10-05 | 1982-12-02 | Artur Dr.H.C. 7244 Waldachtal Fischer | Drilling unit for producing an undercut in the borehole |
| DE2948682A1 (en) * | 1979-12-04 | 1981-06-11 | Friedrich Duss Maschinenfabrik GmbH & Co, 7265 Neubulach | Portable drill with dust-exhaustion equipment - has rear end of bit protruding into transverse passage in chuck |
| DE3332806A1 (en) * | 1983-09-12 | 1985-03-28 | Artur Dr.H.C. 7244 Waldachtal Fischer | DRILLING DEVICE FOR PRODUCING DRILL HOLES WITH UNDERCUT |
| DE3335074A1 (en) * | 1983-09-28 | 1985-04-11 | Heinrich 6102 Pfungstadt Liebig | Undercutting drilling tool |
-
1989
- 1989-02-04 DE DE3903369A patent/DE3903369A1/en not_active Withdrawn
- 1989-08-26 EP EP89115757A patent/EP0363617B1/en not_active Expired - Lifetime
- 1989-08-26 DE DE8989115757T patent/DE58901943D1/en not_active Expired - Lifetime
- 1989-08-26 ES ES198989115757T patent/ES2034536T3/en not_active Expired - Lifetime
- 1989-09-25 AU AU41664/89A patent/AU599862B2/en not_active Ceased
- 1989-09-27 FI FI894582A patent/FI894582A/en not_active IP Right Cessation
- 1989-09-29 PL PL89281636A patent/PL162191B1/en unknown
- 1989-09-30 CN CN89107608A patent/CN1019774B/en not_active Expired
- 1989-10-02 CA CA002000054A patent/CA2000054C/en not_active Expired - Fee Related
- 1989-10-09 HU HU895257A patent/HU206651B/en not_active IP Right Cessation
- 1989-10-09 DK DK497689A patent/DK497689A/en not_active Application Discontinuation
- 1989-10-12 KR KR1019890014603A patent/KR900006050A/en not_active Application Discontinuation
- 1989-10-12 PT PT91970A patent/PT91970B/en not_active IP Right Cessation
- 1989-10-12 CS CS895799A patent/CS277058B6/en unknown
- 1989-10-13 NO NO89894100A patent/NO894100L/en unknown
- 1989-10-13 JP JP1265353A patent/JPH0686052B2/en not_active Expired - Lifetime
- 1989-10-13 YU YU01987/89A patent/YU198789A/en unknown
- 1989-10-13 BR BR898905212A patent/BR8905212A/en not_active IP Right Cessation
- 1989-10-13 RU SU894742112A patent/RU1829988C/en active
-
1992
- 1992-07-30 GR GR920400313T patent/GR3005312T3/el unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8360698B2 (en) | 2007-06-29 | 2013-01-29 | Okuma Corporation | Cutting method |
Also Published As
| Publication number | Publication date |
|---|---|
| DE58901943D1 (en) | 1992-09-03 |
| CA2000054A1 (en) | 1990-04-14 |
| HU895257D0 (en) | 1990-01-28 |
| EP0363617A1 (en) | 1990-04-18 |
| PT91970A (en) | 1990-04-30 |
| HU206651B (en) | 1992-12-28 |
| RU1829988C (en) | 1993-07-23 |
| CS277058B6 (en) | 1992-11-18 |
| BR8905212A (en) | 1990-05-15 |
| NO894100L (en) | 1990-04-17 |
| KR900006050A (en) | 1990-05-07 |
| ES2034536T3 (en) | 1993-04-01 |
| NO894100D0 (en) | 1989-10-13 |
| PT91970B (en) | 1995-08-09 |
| DE3903369A1 (en) | 1990-08-09 |
| HUT54554A (en) | 1991-03-28 |
| FI894582A (en) | 1990-04-15 |
| CS579989A3 (en) | 1992-06-17 |
| AU599862B2 (en) | 1990-07-26 |
| EP0363617B1 (en) | 1992-07-29 |
| YU198789A (en) | 1991-06-30 |
| CN1019774B (en) | 1992-12-30 |
| AU4166489A (en) | 1990-04-26 |
| DK497689A (en) | 1990-04-15 |
| CN1041906A (en) | 1990-05-09 |
| DK497689D0 (en) | 1989-10-09 |
| JPH0686052B2 (en) | 1994-11-02 |
| PL162191B1 (en) | 1993-09-30 |
| JPH02150308A (en) | 1990-06-08 |
| FI894582A0 (en) | 1989-09-27 |
| GR3005312T3 (en) | 1993-05-24 |
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