CA2040052C - Rock drill - Google Patents
Rock drillInfo
- Publication number
- CA2040052C CA2040052C CA002040052A CA2040052A CA2040052C CA 2040052 C CA2040052 C CA 2040052C CA 002040052 A CA002040052 A CA 002040052A CA 2040052 A CA2040052 A CA 2040052A CA 2040052 C CA2040052 C CA 2040052C
- Authority
- CA
- Canada
- Prior art keywords
- cutting
- shank
- drill head
- drill
- extending
- 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
- 239000011435 rock Substances 0.000 title claims abstract description 18
- 238000005553 drilling Methods 0.000 claims abstract description 18
- 230000001154 acute effect Effects 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 3
- 150000002500 ions Chemical class 0.000 description 15
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 3
- ACXGJHCPFCFILV-UHFFFAOYSA-M sodium;2-(4-chloro-2-methylphenoxy)acetate;3,6-dichloro-2-methoxybenzoic acid Chemical compound [Na+].COC1=C(Cl)C=CC(Cl)=C1C(O)=O.CC1=CC(Cl)=CC=C1OCC([O-])=O ACXGJHCPFCFILV-UHFFFAOYSA-M 0.000 description 2
- CHBRHODLKOZEPZ-UHFFFAOYSA-N Clotiazepam Chemical compound S1C(CC)=CC2=C1N(C)C(=O)CN=C2C1=CC=CC=C1Cl CHBRHODLKOZEPZ-UHFFFAOYSA-N 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
Classifications
-
- 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
- E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
- E21B10/445—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts percussion type, e.g. for masonry
-
- 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
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
- E21B10/56—Button-type inserts
-
- 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
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
- E21B10/58—Chisel-type inserts
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Drilling Tools (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Walking Sticks, Umbrellas, And Fans (AREA)
Abstract
A rock drill has an axially extending shank (1) with a drill head (2) on one end. The drill head (2) has an end face (3) with a cutting blade (4) and cutting pins (5) extending outwardly from the and face in the drilling direction. The cutting blade (4) extends, diametrically across the end face and projects radially outwardly from the drill head (2) said axially outwardly from the end face (3). The cutting pins (5) are arranged on a diameter of the drill head which forms an acute angle relative to the cutting blade (4). Due to the acute angle between the cutting pins and the diametrically arranged cutting blade, removal grooves extending axially from the end face can be enlarged.
Description
0~5~
B~CK5~<0~ ~:~ T~ INV~hLll:)N
The presPnt inventiQn is directed ~o A rc~c:k drill with a drill head at one end o~ ~n axially extending ~hank~ A cutter blade extends dîam~txically a~ross and p~oj~ct~ ~adially outwardly ~rom the dri 11 head and at least two cut~er pins ex~en~l ou~w~rdly ~rom ~he ~rill h~d end ~ace in th~ drilling dire~::tion .
RoGk drills ar~ used :~or cutting holes ~r }:~ores in rock, c:onc:ret~, masonry and the like and serve for receiviny faste~ing mem~ers, as passages ~or pipes or cables as well as for ~xplosi~res in ~lasting op~r~ti4ns~ Roc:k drills ha~ing a com~ination o~ cu~ing. I~lades ~nd cut~ing pins have the a~vaslta~e tha the drilled material or drillings rernoved by the autting blada are fuxther c:omminu~ed by ~h~ cutting pins. Such ro~-k drills are dis~lo~ed in l:)E~OS 35 44 433. ~or a vari~ty o~
working c~nditions, the ~utput l~vel o:~ such known roGk drills i~, s~tisfac~ory. Unde3~ certz~in c)perz~ting conditions, however, the ramov~l of the drillings ~nd the ~d of ~h~ ro~ drill is not optimum.
SUMMP.RY OF TX15 l~v~ N
.
The priT~a~y objec~ h~ pxesen~ inven~ion is 'co provide a rocX drlll ena~lin~ ~dditiorlal comminut~on o~ th~
~' .
.. , , ~
, :
~. ' ~' ' ' ' .
5;~
drillings at a high ma~erial ~rilling rat~, while a~ordizlg ~n improved removal o~ the d~illings~
In acoordanc:~ with the present lnvention, ~h~ impro~ed op~ra~ion is ~ hieved by loc!ating the cutting pins on a diame~er Olc the ~rill head pO~;itiOh~d a~: an acutQ angle wi~h the diamet~ically extendin~ cutting blade. ~ue ~o the ~rrangement of the cu'tti~g pin~ in ~s~caoraan::e with ~he presen~ in~en~lon, an enlargemen~ of the drilled rA~, ~rial removal grooves is obtained.
AdYantageously, t~e cuttin~ pins are loc~ed on both o~ the apposite sid.es of th~ cu~tlng ~lade. Accordi~n~ly, a symme~xi ::al arrangemen~ ls possi}: le.
.
This feat~re i~; partic:ularly applic~ when the nunber o~ ou~tting pins is equ~l Oh }~oth side~ o~ the cu~ter blade . with an equal number of ~ut~ing pins on the opposi te sides of the ~u~ing blade, ~ more uni~m c:on~nunltion of ~he dri~lled mat~rial is g~ ned alo~g with a ~mo~t~er opera~ion of the rock drill.
By loca~ing two cutting pins in the r~dially outer edge zone oP ~he d~ill head, ~n ~dditional c~n~erirl~. e~f~t of the roc}; drill is obt~in~d during ~he drilling oper~tion.
.. . .
, . - . : ' . , .
: . ,.
5;2 Preferably, the ou~ting pi~s are arr~r.ged rc~l:ationally symm~tri~al t~ ~xi~ he shank. Suc~ ~n arrangement ~s~ures an improved operati~ smoothnes.s of the ro~k d~ along wlth a ~?recise d~illing geom~ry~
In a preferred ~rrarlgeme~ he a~u~ ~ngle between the diameter on whic:h the cutting pins ~re located ~nd the dia~[ etrically arranged cutter ~lade is ln the rar~ge ~ 4 0~ to 70~. Such an angular range has p~oved especially sati~acto~y, ~ec;~use the arr~ngement of ~uf~ ien1~:Ly l~rge removal gr~ove~ i~
particularly favora~le in the ~nd fa~ o~ ~he drill head in the ~e~ion o~ the compl~men~ry o}~tuse angle.
A hel i~al rib. ~dj oins ~h~ remov~l groo~e with the heliaal ri~ del:erminin~ ~h~ dix~c~tion o~ ro~a~ion o~ ~he rock drill~ The acute anyle ~orme~ by the ~iametri~ally ~rr~ ed cutter hlad~s and the diamet~r on which ~he cut~:~ng pins are loc:ated is preferahly ~rranged on the sid~ ~ ~he cutting bl~de ~ral lin~ in th~3 ro~ational dir~ion.
~, .
e~pecially e~ec:~ive ~or the c:ommi~utic~ o~ the dri~led mate~i~l, to arrange the cut~ing pirls inoline~l outwardly rela~i~e ~o th~ :shank axis, howe~r, th~ ~rr~ncJement o~ the cu~ing pins p~rallel to ~he ~hank ~xi~ lso po~qlble~
The le~ding ~nd ~aces o~ the cutting pin~; pc~lnting in the drilling direction pre~arably do nc)t lie on th~ c:onic:al . ,~ .
, 5i~
rotational plane ~ormed by the cu~ting edg~ of khe ~ut~ing blade, rather t.hey arR o~ t re~rwardly ~rom ~uch plane~ ~or example, in the range o~ o. 3 D to 1 ~ 5 mm. Accordingly, ~h~
feed ~elocity during th~ drilling operati~ ls more ~ni~orm, sinc~ th~ cutting pins contact ~ sur~c~ of the m~t~ri~ being drilled ~t nearly the sam~ poin~ in tim~ as ~h~ cuttlng blade~
~ s a re~ul~, a mo~ uni~o~m removal o~ th~ drilled m~teri~l is a~tained. In ad~iti~n, ~he ~u~ing p~n~ ~$sUme an abutmen~ function *or the dr~ll head ih ~he d~illin~ dir~s~ion.
The v~riou~ f~atures of novelty which ch~r~ct~rize the invention are pointed out with partiaular~y in the claim~
annexed to and ~orming a yart of this disclo~ur~. ~or a better under~tanding o~ the inv~n~ion, i~5 operating advantages and spa~ifi~ obiec~s aktain~d by i~s use, referance ~hould be had to the a~aompanyin~ dr~wings and descrlptive matter ih which ~her~
are illustr~ed an~ de~cribed pre~erred embodiments ~ the inven~ion.
DE8CRIP'rI0~ 0~ T~E t:~R~WIN~;
In the dr~wing:
Fig~ 1 is a partial axially extending ~iew of a ro~
dr~ 11 embodying the present inventiont , .
~''' ,.
Fig. 2 is arl en~ ~:Lew of the rock drill a~ ~hown in F ig . l; an~
Fi~ n ~xially ex~ending sec~ional view ~hrough ~he rock drill in Figs. 1 and 2, t~}c~n ;~long ~hB lin~ I in ~i~. 2.
DETAII. I)~:~CRIP~ION OF q?~35 1~1y~ 1 ON
In Figs. 1, ~ ~nd 3 ~ rock drill is shown comprisin~
an axiall~ extPncling shan}c ~ with a drill head ~ ~rmed on one erd o~ the ~hahk~ Sh~nk 1 has a h~lic~l rib g pro~ecting o~l~war~ly from i~ outer. sur~ce ~or guiding the drill in a hole 3:eing drilled and also ~or ~iding in the removal of the drilled material or drillings. Drill heaA 2 ha~ ~xially extending removAl grooves ~, 10 exten~n~ from ~he end ~ace 2 o~ ~he drill head ~nd ~erving far conveyir~g the drillings ~x~m ~h~ end f~e opposite ~o ~h6~ drilling direction ~ow~r~ the sh~nk 1. A
dia~rically positioned cut~in~ blade 4 extends a~ross ~he ~nd ~ace ~ of the drill head ~ CU~ti~g blade 4 pro~ s axially in the drilling ~ire~tion ~ron~ the end ~c~ o~ the drill head an~
al o proj ects r~dially ~utwardly ~om the circum~enc~ of th~
drill hea~. A pair ou~ting pirls ~ a~e ~ecure~ in the drill head and extending outwardly from the end ~oe. Ilhe outtin~ pi~s 5 are located on ~ ~ia~nete~ o~ the drill head wh1ch ens: loses an acute angle a with the diametricAlly arranged cuttirlg ~lad~ 4.
. ...
.,, ~
, ; ;
Aaute ~ngl~ a, shown in ~iy. 3, is ~ormed with ths side o~ ~h~
cu~ting b},ade trailing in the ro~ional direç~ion 1:~.
In the sec~ion~l view a.~:fo~ded ir~ Fig~ 3, i~ i~ shown ~l~arly ~h~ the cut~in~ pin~ 5 are incline~, ou~wardly ~rom the shank ~xis in the drilling dire~tion. The cutting pins 5 ar~
embe~ed in~o the drlll he~.d 2 so t:h~ the leading ends of the cutting pl~s ~ pra; ect ou~wardly from the e~d ~ e 3 bu'c ar~
located l~ tween the ~nd ~ace and the c~onic:al plane formed by ~he inal ~ ned c~ttinq ed~e~ 7, 8 vf the cll'cting bladé 4 .
While the illustrated embodiment ~haws one pair of ¢ut~ing pin~ 5, ~ditional pair~ ~an be p~ovided. The 2~rrange~
Flen~ of ~he c:ut~ing blade 4 and the ~utting pins ~ is symmetri-c~al in the r~t~ional direction.
As disp~ayed in Fig. 2, th~ rock drill ro~a~es counter clo~kwise, note the rota.ti4nal direc~ion ~~, so that the cu~ing edge 7, as i~ moves in ~he rotational direo~ion D, is followed by the remov~ oc~ve 10, the c~u!:ting pin 5, the removal groove ~, and then ~he ~ut~ing ~dg~ 8 whiah, in turn, is ~ollowed by the xemoval groove lO, the c:utting pin 5, and ~he removal'~roove ~. . . ..
., 7 2~ 5~
. .
~ s can be nv~d in Fig. ~, the angular ex~ent: of ~che rem~val ~rooves 6 is ~nlarged duQ to th~ angul~r po3ition o~ t~
ing pin~; 5 r~lative -to the ~u'c~ing blad~ 4~
While specifio ~odimehts o~ the inv~nt1on hav~ ~een shown lnd ~esoribed in detail to i~ st~rate the ~pplica~ion of the inv~ntive p~inciple9, it will be under~ood th~t the invention may be embo~i~d oth~ise wi~hout depa~tin~ fro~ ~uçh princ ipl~s ~
, . 8
B~CK5~<0~ ~:~ T~ INV~hLll:)N
The presPnt inventiQn is directed ~o A rc~c:k drill with a drill head at one end o~ ~n axially extending ~hank~ A cutter blade extends dîam~txically a~ross and p~oj~ct~ ~adially outwardly ~rom the dri 11 head and at least two cut~er pins ex~en~l ou~w~rdly ~rom ~he ~rill h~d end ~ace in th~ drilling dire~::tion .
RoGk drills ar~ used :~or cutting holes ~r }:~ores in rock, c:onc:ret~, masonry and the like and serve for receiviny faste~ing mem~ers, as passages ~or pipes or cables as well as for ~xplosi~res in ~lasting op~r~ti4ns~ Roc:k drills ha~ing a com~ination o~ cu~ing. I~lades ~nd cut~ing pins have the a~vaslta~e tha the drilled material or drillings rernoved by the autting blada are fuxther c:omminu~ed by ~h~ cutting pins. Such ro~-k drills are dis~lo~ed in l:)E~OS 35 44 433. ~or a vari~ty o~
working c~nditions, the ~utput l~vel o:~ such known roGk drills i~, s~tisfac~ory. Unde3~ certz~in c)perz~ting conditions, however, the ramov~l of the drillings ~nd the ~d of ~h~ ro~ drill is not optimum.
SUMMP.RY OF TX15 l~v~ N
.
The priT~a~y objec~ h~ pxesen~ inven~ion is 'co provide a rocX drlll ena~lin~ ~dditiorlal comminut~on o~ th~
~' .
.. , , ~
, :
~. ' ~' ' ' ' .
5;~
drillings at a high ma~erial ~rilling rat~, while a~ordizlg ~n improved removal o~ the d~illings~
In acoordanc:~ with the present lnvention, ~h~ impro~ed op~ra~ion is ~ hieved by loc!ating the cutting pins on a diame~er Olc the ~rill head pO~;itiOh~d a~: an acutQ angle wi~h the diamet~ically extendin~ cutting blade. ~ue ~o the ~rrangement of the cu'tti~g pin~ in ~s~caoraan::e with ~he presen~ in~en~lon, an enlargemen~ of the drilled rA~, ~rial removal grooves is obtained.
AdYantageously, t~e cuttin~ pins are loc~ed on both o~ the apposite sid.es of th~ cu~tlng ~lade. Accordi~n~ly, a symme~xi ::al arrangemen~ ls possi}: le.
.
This feat~re i~; partic:ularly applic~ when the nunber o~ ou~tting pins is equ~l Oh }~oth side~ o~ the cu~ter blade . with an equal number of ~ut~ing pins on the opposi te sides of the ~u~ing blade, ~ more uni~m c:on~nunltion of ~he dri~lled mat~rial is g~ ned alo~g with a ~mo~t~er opera~ion of the rock drill.
By loca~ing two cutting pins in the r~dially outer edge zone oP ~he d~ill head, ~n ~dditional c~n~erirl~. e~f~t of the roc}; drill is obt~in~d during ~he drilling oper~tion.
.. . .
, . - . : ' . , .
: . ,.
5;2 Preferably, the ou~ting pi~s are arr~r.ged rc~l:ationally symm~tri~al t~ ~xi~ he shank. Suc~ ~n arrangement ~s~ures an improved operati~ smoothnes.s of the ro~k d~ along wlth a ~?recise d~illing geom~ry~
In a preferred ~rrarlgeme~ he a~u~ ~ngle between the diameter on whic:h the cutting pins ~re located ~nd the dia~[ etrically arranged cutter ~lade is ln the rar~ge ~ 4 0~ to 70~. Such an angular range has p~oved especially sati~acto~y, ~ec;~use the arr~ngement of ~uf~ ien1~:Ly l~rge removal gr~ove~ i~
particularly favora~le in the ~nd fa~ o~ ~he drill head in the ~e~ion o~ the compl~men~ry o}~tuse angle.
A hel i~al rib. ~dj oins ~h~ remov~l groo~e with the heliaal ri~ del:erminin~ ~h~ dix~c~tion o~ ro~a~ion o~ ~he rock drill~ The acute anyle ~orme~ by the ~iametri~ally ~rr~ ed cutter hlad~s and the diamet~r on which ~he cut~:~ng pins are loc:ated is preferahly ~rranged on the sid~ ~ ~he cutting bl~de ~ral lin~ in th~3 ro~ational dir~ion.
~, .
e~pecially e~ec:~ive ~or the c:ommi~utic~ o~ the dri~led mate~i~l, to arrange the cut~ing pirls inoline~l outwardly rela~i~e ~o th~ :shank axis, howe~r, th~ ~rr~ncJement o~ the cu~ing pins p~rallel to ~he ~hank ~xi~ lso po~qlble~
The le~ding ~nd ~aces o~ the cutting pin~; pc~lnting in the drilling direction pre~arably do nc)t lie on th~ c:onic:al . ,~ .
, 5i~
rotational plane ~ormed by the cu~ting edg~ of khe ~ut~ing blade, rather t.hey arR o~ t re~rwardly ~rom ~uch plane~ ~or example, in the range o~ o. 3 D to 1 ~ 5 mm. Accordingly, ~h~
feed ~elocity during th~ drilling operati~ ls more ~ni~orm, sinc~ th~ cutting pins contact ~ sur~c~ of the m~t~ri~ being drilled ~t nearly the sam~ poin~ in tim~ as ~h~ cuttlng blade~
~ s a re~ul~, a mo~ uni~o~m removal o~ th~ drilled m~teri~l is a~tained. In ad~iti~n, ~he ~u~ing p~n~ ~$sUme an abutmen~ function *or the dr~ll head ih ~he d~illin~ dir~s~ion.
The v~riou~ f~atures of novelty which ch~r~ct~rize the invention are pointed out with partiaular~y in the claim~
annexed to and ~orming a yart of this disclo~ur~. ~or a better under~tanding o~ the inv~n~ion, i~5 operating advantages and spa~ifi~ obiec~s aktain~d by i~s use, referance ~hould be had to the a~aompanyin~ dr~wings and descrlptive matter ih which ~her~
are illustr~ed an~ de~cribed pre~erred embodiments ~ the inven~ion.
DE8CRIP'rI0~ 0~ T~E t:~R~WIN~;
In the dr~wing:
Fig~ 1 is a partial axially extending ~iew of a ro~
dr~ 11 embodying the present inventiont , .
~''' ,.
Fig. 2 is arl en~ ~:Lew of the rock drill a~ ~hown in F ig . l; an~
Fi~ n ~xially ex~ending sec~ional view ~hrough ~he rock drill in Figs. 1 and 2, t~}c~n ;~long ~hB lin~ I in ~i~. 2.
DETAII. I)~:~CRIP~ION OF q?~35 1~1y~ 1 ON
In Figs. 1, ~ ~nd 3 ~ rock drill is shown comprisin~
an axiall~ extPncling shan}c ~ with a drill head ~ ~rmed on one erd o~ the ~hahk~ Sh~nk 1 has a h~lic~l rib g pro~ecting o~l~war~ly from i~ outer. sur~ce ~or guiding the drill in a hole 3:eing drilled and also ~or ~iding in the removal of the drilled material or drillings. Drill heaA 2 ha~ ~xially extending removAl grooves ~, 10 exten~n~ from ~he end ~ace 2 o~ ~he drill head ~nd ~erving far conveyir~g the drillings ~x~m ~h~ end f~e opposite ~o ~h6~ drilling direction ~ow~r~ the sh~nk 1. A
dia~rically positioned cut~in~ blade 4 extends a~ross ~he ~nd ~ace ~ of the drill head ~ CU~ti~g blade 4 pro~ s axially in the drilling ~ire~tion ~ron~ the end ~c~ o~ the drill head an~
al o proj ects r~dially ~utwardly ~om the circum~enc~ of th~
drill hea~. A pair ou~ting pirls ~ a~e ~ecure~ in the drill head and extending outwardly from the end ~oe. Ilhe outtin~ pi~s 5 are located on ~ ~ia~nete~ o~ the drill head wh1ch ens: loses an acute angle a with the diametricAlly arranged cuttirlg ~lad~ 4.
. ...
.,, ~
, ; ;
Aaute ~ngl~ a, shown in ~iy. 3, is ~ormed with ths side o~ ~h~
cu~ting b},ade trailing in the ro~ional direç~ion 1:~.
In the sec~ion~l view a.~:fo~ded ir~ Fig~ 3, i~ i~ shown ~l~arly ~h~ the cut~in~ pin~ 5 are incline~, ou~wardly ~rom the shank ~xis in the drilling dire~tion. The cutting pins 5 ar~
embe~ed in~o the drlll he~.d 2 so t:h~ the leading ends of the cutting pl~s ~ pra; ect ou~wardly from the e~d ~ e 3 bu'c ar~
located l~ tween the ~nd ~ace and the c~onic:al plane formed by ~he inal ~ ned c~ttinq ed~e~ 7, 8 vf the cll'cting bladé 4 .
While the illustrated embodiment ~haws one pair of ¢ut~ing pin~ 5, ~ditional pair~ ~an be p~ovided. The 2~rrange~
Flen~ of ~he c:ut~ing blade 4 and the ~utting pins ~ is symmetri-c~al in the r~t~ional direction.
As disp~ayed in Fig. 2, th~ rock drill ro~a~es counter clo~kwise, note the rota.ti4nal direc~ion ~~, so that the cu~ing edge 7, as i~ moves in ~he rotational direo~ion D, is followed by the remov~ oc~ve 10, the c~u!:ting pin 5, the removal groove ~, and then ~he ~ut~ing ~dg~ 8 whiah, in turn, is ~ollowed by the xemoval groove lO, the c:utting pin 5, and ~he removal'~roove ~. . . ..
., 7 2~ 5~
. .
~ s can be nv~d in Fig. ~, the angular ex~ent: of ~che rem~val ~rooves 6 is ~nlarged duQ to th~ angul~r po3ition o~ t~
ing pin~; 5 r~lative -to the ~u'c~ing blad~ 4~
While specifio ~odimehts o~ the inv~nt1on hav~ ~een shown lnd ~esoribed in detail to i~ st~rate the ~pplica~ion of the inv~ntive p~inciple9, it will be under~ood th~t the invention may be embo~i~d oth~ise wi~hout depa~tin~ fro~ ~uçh princ ipl~s ~
, . 8
Claims (6)
1. A rock drill having an axis extending in a drilling direction and having a rotational direction, said rock drill comprising an axially extending shank and a drill head having an outside diameter and located at and extending axially outwardly from a first end of said shank, said shank having an outside surface, said drill head axially aligned with said shank, said drill head having an end face extending transversely of the drilling direction, a cutting blade mounted in said drill head and extending diametrically across said end face traversing the axis of said drill head and extending axially from and radially outwardly beyond the outside diameter of said drill head, and at least two cutting pins mounted in and extending outwardly from the end face of said drill head, a helical rib extending around and outwardly from the outside surface of said shank from the first end thereof away from said drill head wherein the improvement comprises that said cutting pins are each located on a single straight line extending through the axis of said drill head with the straight line spaced at an acute angle (a) from the cutting blade said cutting pins are located on the single straight line each on an opposite side of said cutting blade and said cutting pins are rotationally symmetrical relative to the shank axis and are located in a radially outer edge zone of said drill head, said drill head having axially extending removal grooves extending from the end face of the drill head to adjacent the first end of said shank for conveying drilled material for passage along said shank and helical ribs, said removal grooves comprising first removal grooves having a larger angular extent than second removal grooves , and in the rotational direction of said rock drill the first removal grooves trail said cutting pins and the second removal grooves lead said cutting pins on each of the opposite sides of said cutting blade .
2. A rock drill, as set forth in claim 1, wherein the equal number of said cutting pins are located on each of the opposite sides of said cutting blade.
3. A rock drill, as set forth in claim 1, wherein the acute angle (a) is in the range of 40 degrees to 70 degrees.
4. A rock drill, as set forth in claim 1. wherein said cutting pins are inclined outwardly in the drilling direction relative to the shank axis.
5. A rock drill, as set forth in claim 1, wherein said end face is conically shaped with the apex of the coni. cally shaped end face located on the axis of said shank, said cutting blade has an apex located on the axis of said shank with a pair of cutting edges inclined outwardly from the apex with the inclination being opposite to the drilling direction, said cutting pins having leading ends facing in the drilling direction and projecting outwardly from said end face of said drill head, said cutting edges forming a conically shaped plane as said rock drill rotates about the axis of said shank, and the leading ends of said cutting pins located between the rotational plane of said cutting edges and said end face.
6. A rock drill, as set forth in claim 5, wherein the leading ends of said cutting pins are spaced in the range of 0.3 mm to 1.5 mm from the rotational plane of said cutting edges.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4011441A DE4011441A1 (en) | 1990-04-09 | 1990-04-09 | ROCK DRILL |
| DEP4011441.4 | 1990-04-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2040052A1 CA2040052A1 (en) | 1991-10-10 |
| CA2040052C true CA2040052C (en) | 1998-09-29 |
Family
ID=6404062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002040052A Expired - Fee Related CA2040052C (en) | 1990-04-09 | 1991-04-09 | Rock drill |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0452255B1 (en) |
| JP (1) | JP2880584B2 (en) |
| AT (1) | ATE115677T1 (en) |
| AU (1) | AU631054B2 (en) |
| CA (1) | CA2040052C (en) |
| DE (2) | DE4011441A1 (en) |
| ES (1) | ES2066407T3 (en) |
| PL (1) | PL165702B1 (en) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4419641A1 (en) * | 1994-06-04 | 1995-12-07 | Hilti Ag | Rock drill |
| AT1513U1 (en) * | 1995-11-23 | 1997-06-25 | Techmo Entw & Vertriebs Gmbh | DRILL BIT |
| DE19545646A1 (en) * | 1995-12-07 | 1997-06-12 | Hilti Ag | Rotary impact twist drill |
| DE19734093A1 (en) * | 1996-11-11 | 1998-05-14 | Hawera Probst Gmbh | Drill bit for boring into masonry especially concrete |
| WO1998021442A1 (en) | 1996-11-11 | 1998-05-22 | Hawera Probst Gmbh | Rock drill |
| DE19703994B4 (en) * | 1997-02-03 | 2006-04-20 | Drebo Werkzeugfabrik Gmbh | drill |
| DE19811887A1 (en) | 1998-03-18 | 1999-09-23 | Plica Werkzeugfabrik Ag Mollis | Hammer drilling tool |
| EP0943780A3 (en) * | 1998-03-18 | 2000-07-19 | Plica Werkzeugfabrik Ag | Drilling tool |
| DE29901296U1 (en) | 1999-01-26 | 1999-06-10 | Plica Werkzeugfabrik Ag, Mollis | Drilling tool |
| DE19944406C2 (en) * | 1999-09-16 | 2003-07-31 | Heller Dinklage Gmbh Geb | rock drill |
| DE19964272C2 (en) * | 1999-09-16 | 2003-05-28 | Heller Dinklage Gmbh Geb | Drills, in particular rock drills |
| DE10024433A1 (en) | 2000-05-19 | 2001-11-29 | Hawera Probst Gmbh | Rock drill |
| EP1302290B1 (en) | 2001-10-12 | 2008-07-02 | Robert Bosch Gmbh | Drilling tool |
| DE10208631A1 (en) * | 2002-02-28 | 2003-09-11 | Hawera Probst Gmbh | drilling |
| DE10334610B4 (en) * | 2003-07-29 | 2006-04-20 | Hilti Ag | wellhead |
| DE10351183A1 (en) | 2003-11-03 | 2005-06-02 | Illinois Tool Works Inc., Glenview | rock drill |
| CN101010482B (en) * | 2004-08-25 | 2014-04-09 | 三菱综合材料株式会社 | Excavating tool and steel pipe forepoling method |
| US7861807B2 (en) | 2008-12-03 | 2011-01-04 | Black & Decker Inc. | Drill bit including one piece cutting head |
| KR20110128694A (en) * | 2010-05-24 | 2011-11-30 | 태양파워(주) | Drill bit |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0428953Y2 (en) * | 1986-12-02 | 1992-07-14 | ||
| DE3825107C2 (en) * | 1988-07-23 | 1996-07-11 | Hilti Ag | Rock drill with cutting insert |
-
1990
- 1990-04-09 DE DE4011441A patent/DE4011441A1/en not_active Withdrawn
-
1991
- 1991-03-21 ES ES91810185T patent/ES2066407T3/en not_active Expired - Lifetime
- 1991-03-21 EP EP91810185A patent/EP0452255B1/en not_active Expired - Lifetime
- 1991-03-21 AT AT91810185T patent/ATE115677T1/en not_active IP Right Cessation
- 1991-03-21 DE DE59103840T patent/DE59103840D1/en not_active Expired - Fee Related
- 1991-04-05 AU AU74159/91A patent/AU631054B2/en not_active Ceased
- 1991-04-08 JP JP3101826A patent/JP2880584B2/en not_active Expired - Fee Related
- 1991-04-08 PL PL91289787A patent/PL165702B1/en unknown
- 1991-04-09 CA CA002040052A patent/CA2040052C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP0452255A3 (en) | 1992-10-28 |
| JP2880584B2 (en) | 1999-04-12 |
| ATE115677T1 (en) | 1994-12-15 |
| JPH04228796A (en) | 1992-08-18 |
| DE59103840D1 (en) | 1995-01-26 |
| AU631054B2 (en) | 1992-11-12 |
| EP0452255B1 (en) | 1994-12-14 |
| ES2066407T3 (en) | 1995-03-01 |
| PL289787A1 (en) | 1991-10-21 |
| DE4011441A1 (en) | 1991-10-10 |
| AU7415991A (en) | 1991-10-10 |
| EP0452255A2 (en) | 1991-10-16 |
| PL165702B1 (en) | 1995-01-31 |
| CA2040052A1 (en) | 1991-10-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |