CH454064A - Drill head - Google Patents
Drill headInfo
- Publication number
- CH454064A CH454064A CH444466A CH444466A CH454064A CH 454064 A CH454064 A CH 454064A CH 444466 A CH444466 A CH 444466A CH 444466 A CH444466 A CH 444466A CH 454064 A CH454064 A CH 454064A
- Authority
- CH
- Switzerland
- Prior art keywords
- drill head
- cuttings
- suction
- metal plate
- hard metal
- Prior art date
Links
- 238000005520 cutting process Methods 0.000 claims description 10
- 238000005553 drilling Methods 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 238000009527 percussion Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/26—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by impact tools, e.g. by chisels or other tools having a cutting edge
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/36—Percussion drill bits
- E21B10/38—Percussion drill bits characterised by conduits or nozzles for drilling fluids
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Description
Bohrkopf Die Erfindung betrifft einen Bohrkopf mit zentraler Bohrkleinabsaugung für Bohrhämmer, in dem parallel zu seiner Achse eine Hartmetallplatte angeordnet ist.
Bekannt sind bereits Schlagbohrköpfe, bei denen zur Absaugung des Bohrkleins nach innen konisch verlaufen de Bohrungen angeordnet sind. Nachteilig bei diesen be kannten Schlagbohrköpfen ist, dass das Anbringen der Bohrungen und insbesondere das konische Aufreiben der Bohrungen von innen verhältnismässig teuer ist.
Ferner wird bei diesen bekannten Schlagbohrköpfen ein etwa kreisförmiger Bereich der Bohrlochsohle um die Werk zeugspitze herum nicht einwandfrei sauber abgesaugt, so dass sich ein Bohrkleinpolster bildet, durch das der Bohr fortschritt gehemmt und ein starker Verschleiss des Schaftmaterials im Bereich der Schneidenspitze hervorge rufen wird.
Der Zweck der vorliegenden Erfindung ist es, diese Nachteile zu vermeiden. Dieser Zweck wird gemäss der Erfindung dadurch erreicht, dass der Bohrkopf mit äus- seren Aussparungen sowie mit einem zentralen, nach innen aufgeweiteten Kanal mit elliptischem Querschnitt für die Bohrkleinabsaugung versehen ist, der durch die Hart metallplatte senkrecht zur längeren Querschnittsachse mit tig geteilt ist.
In der Zeichnung ist der der Erfindung zugrunde liegende Schlagbohrkopf in Form eines Ausführungs- beispieles schematisch dargestellt. Es zeigen Fig. 1 eine Seitenansicht, Fig. 2 eine Draufsicht.
Wie aus den Fig. 1 und 2 hervorgeht, ist der Schlag bohrkopf mit äusseren Aussparungen 1 versehen, die der Zufuhr von Frischluft in das Bohrloch dienen. Die Fig. 1 und 2 zeigen ferner einen zentralen, nach innen aufge- weiteten Kanal mit einem elliptischen Querschnitt 2. Durch diesen Kanal, der durch eine Hartmetallplatte 3 senkrecht zur längeren Querschnittsachse mittig geteilt ist, wird das Bohrklein abgesaugt.
Durch den einfachen Aufbau des Bohrkopfes ist es vorteilhafterweise möglich, sowohl die innere als auch die äussere Form in einem Arbeitsgang durch Schmieden, Giessen, Spritzen usw. herzustellen. Eine weitere Bear beitung des Körpers erübrigt sich.
Abgesehen von der wesentlich einfacheren und damit mit geringeren Kosten verbundenen Herstellung der neuen Schlagbohrköpfe, werden durch diese eine einwandfreie Absaugung des Bohrkleins aus dem Bohrloch erreicht und Verstopfungen des Bohrers verhindert. Darüberhinaus ist der Bohrfortschritt wesentlich höher und der bei den bekannten Schlagbohrköpfen auftretende Verschleiss des Schaftmaterials im Bereich der Schneidenspitze wird ver hindert.
Drill head The invention relates to a drill head with a central suction for drilling cuttings for rotary hammers, in which a hard metal plate is arranged parallel to its axis.
Percussion drill heads are already known, in which de bores are arranged to suction the cuttings inwardly conical. The disadvantage of these known percussion drill heads is that making the bores and in particular the conical reaming of the bores from the inside is relatively expensive.
Furthermore, with these known percussion drill heads, an approximately circular area of the bottom of the borehole around the tool tip is not properly vacuumed, so that a cuttings cushion is formed, through which the drilling progress is inhibited and a heavy wear of the shaft material in the area of the cutting tip will cause.
The purpose of the present invention is to avoid these drawbacks. This purpose is achieved according to the invention in that the drill head is provided with external recesses and with a central, inwardly widened channel with an elliptical cross-section for the suction of drilling cuttings, which is divided by the hard metal plate perpendicular to the longer cross-sectional axis with tig.
The hammer drill head on which the invention is based is shown schematically in the form of an exemplary embodiment. 1 shows a side view, FIG. 2 shows a plan view.
As can be seen from FIGS. 1 and 2, the percussion drill head is provided with external recesses 1 which are used to supply fresh air into the borehole. 1 and 2 also show a central, inwardly widened channel with an elliptical cross section 2. The cuttings are sucked off through this channel, which is divided in the middle by a hard metal plate 3 perpendicular to the longer cross-sectional axis.
Due to the simple construction of the drill head, it is advantageously possible to produce both the inner and the outer shape in one operation by forging, casting, injection molding, etc. No further processing of the body is necessary.
Apart from the much simpler and therefore lower cost production of the new percussion drill heads, they achieve perfect suction of the cuttings from the borehole and prevent blockages of the drill. In addition, the drilling progress is much higher and the wear of the shaft material in the area of the cutting tip that occurs in the known percussion drill heads is prevented.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB81274A DE1217903B (en) | 1965-04-02 | 1965-04-02 | Drill head |
Publications (1)
Publication Number | Publication Date |
---|---|
CH454064A true CH454064A (en) | 1968-04-15 |
Family
ID=6981029
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH444466A CH454064A (en) | 1965-04-02 | 1966-03-28 | Drill head |
Country Status (3)
Country | Link |
---|---|
CH (1) | CH454064A (en) |
DE (1) | DE1217903B (en) |
NL (1) | NL6604364A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4165790A (en) * | 1976-12-10 | 1979-08-28 | Fansteel Inc. | Roof drill bit |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1255065B (en) * | 1966-07-30 | 1967-11-30 | Richard Karnebogen | Impact drill head for compressed air operated retractable hammers |
DE8025800U1 (en) * | 1980-09-26 | 1981-02-05 | Hawera Probst Gmbh + Co, 7980 Ravensburg | DRILL |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2507221A (en) * | 1946-08-19 | 1950-05-09 | Phipps Orville | Single edge percussion bit |
-
1965
- 1965-04-02 DE DEB81274A patent/DE1217903B/en active Pending
-
1966
- 1966-03-28 CH CH444466A patent/CH454064A/en unknown
- 1966-04-01 NL NL6604364A patent/NL6604364A/xx unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4165790A (en) * | 1976-12-10 | 1979-08-28 | Fansteel Inc. | Roof drill bit |
Also Published As
Publication number | Publication date |
---|---|
NL6604364A (en) | 1966-10-03 |
DE1217903B (en) | 1966-06-02 |
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