US3878905A - Drill, especially rock drill - Google Patents

Drill, especially rock drill Download PDF

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Publication number
US3878905A
US3878905A US349611A US34961173A US3878905A US 3878905 A US3878905 A US 3878905A US 349611 A US349611 A US 349611A US 34961173 A US34961173 A US 34961173A US 3878905 A US3878905 A US 3878905A
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US
United States
Prior art keywords
shank
drill
cutting plate
slot
pin
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Expired - Lifetime
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US349611A
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English (en)
Inventor
Dietrich Schaumann
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Hawera Probst Hartmetall Werk Zeugfabrik Ravensburgh KG
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Hawera Probst Hartmetall Werk Zeugfabrik Ravensburgh KG
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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
    • E21B10/62—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable
    • 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
    • B28D1/14—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by boring or drilling
    • B28D1/146—Tools therefor
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/907—Tool or Tool with support including detailed shank
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/909—Having peripherally spaced cutting edges
    • Y10T408/9098—Having peripherally spaced cutting edges with means to retain Tool to support
    • Y10T408/90993—Screw driven means

Definitions

  • the 158 Field of Search 175/394, 395, 410, 383, cutting Plate may be indexable in to expose 175mm 413 414 415, 313; 299/92 respective regions thereof for cutting operations.
  • cutting plate engages the bottom of the slot and is sup- [56] Reerences Cited ported thereby.
  • the engagement of the cutting plate UNITED STATES PATENTS by the bottom and side walls of the slot and by the pin holds the cutting plate against displacement in the 395,034 12/1888 Coffin 175/401 X slot.
  • the present invention relates to a drill, especially rock drill, with a drill shank which has its circumferential surface provided with at least one groove for the drilling dust and which has its drill head provided with a transverse slot having inserted thereinto a plateshaped cutting member which is located in an axial plane of the drill shank and is made of hard metal.
  • FIG. 1 represents a view showing a cutout portion of a drill according to the invention.
  • FIG. 2 illustrates a section taken along the line II II of FIG. 1.
  • FIG. 3 is a section taken along the line III III of FIG. 2.
  • FIG. 4 shows a top view of the drill of FIG. 1.
  • FIG. 5 represents a further embodiment of a drill according to the invention and is illustrates similar to FIG. 4.
  • FIG. 6 is a view of still another embodiment of the cutting member in a drill according to the invention.
  • FIG. 7 shows the cutting member of FIG. 6 as seen in the direction of the arrow A of FIG. 6.
  • FIGS. 8-l0 show still another embodiment of a drill according to the invention and illustrated in a manner corresponding to that of FIGS. 1-3.
  • FIG. ll illustrates another embodiment of a drill according to the invention in an illustration similar to that of FIG. 9.
  • FIG. 12 is a section taken along the line XII-XII of FIG. ll.
  • FIG. I3 shows a further embodiment of a drill according to the invention in an illustrated corresponding to that of FIG. 3.
  • the drill according to the present invention which has its drill shank provided with at least one groove for the drilling dust and has its drill head provided with a transverse slot in which is inserted a plate-shaped cutting member of hard metal or the like is characterized primarily in that the cutting member which is exchangeably inserted into the transverse slot is by means of a detachable holding element secured relative to the drill shank, the holding member being formed by a bolt which is located about at a right angle with regard to the drill axis and is arranged within the enveloping surface of the drill. This bolt engages recesses in the drill shank and in the cutting member.
  • the cutting member may at any desired time quickly be exchanged while the arrangement of the bolt in conformity with the invention will assure a safe holding of the cutting member.
  • the bolt is located at a right angle with regard to the cutting member while engaging the cutting member only over a short portion of its length.
  • the bolt will be able for all practical purposes over the entire width of the cutting member to engage the cutting member and the drill shank. It is furthermore expedient to have the bolt located approximately symmetrically with regard to the cutting member.
  • the axis of the bolt intersects with the axis of the drill.
  • the bolt engages a recess forming a passage, especially a bore, provided in the cutting plate and/or the drill shank.
  • the bolt engages a groove, especially a groove of a cutting plate and/or of the drill shank while the groove corresponds in cross section to the bolt so that the cross section of the cutting blade or of the drill shank need not be completely perforated for receiving the bolt.
  • the groove is provided on a lateral surface of the cutting member and/or the cross sectional slot of the drill shank.
  • the groove in the cutting plate may extend over the entire width of the cutting plate so that the bolt can easily be introduced and pulled out again.
  • At least one groove, especially the groove in the drill shank, is undercut.
  • the groove in the cutting member and the groove in the drill shank form a passage bore for the bolt so that the latter will be safely held and a high strength connection will be assured between the cutting member and the drill shank.
  • the groove in the cutting member has a flatter depth than the groove in the drill shank, especially a depth which is approximately one third of the depth of the groove in the drill shank.
  • a particularly advantageous design of the invention consists in that the bolt is offset relative to the central axis of the recess in the cutting member toward the bottom of the transverse slot so that the bolt when being introduced will be preloaded in a direction transverse to the longitudinal direction of the bolt in such a way that with this preload it will press the cutting member against the bottom of the transverse slot and thus will assure a completely play-free hold of the cutting member.
  • This may also be realized by forming one recess, especially the recess in the cutting member for the bolt, by an elastic spring member inserted into a correspondingly larger receiving opening.
  • the spring member is formed in a simple manner by a spring sleeve and preferably may be of rubberelastic character.
  • bolts it is furthermore possible as bolts to provide screw bolts.
  • a particularly simple construction and a very simple handling will be obtained when the bolt is formed by a press pin, in particular a spiral clamping pm.
  • the cutting member For purposes of resting and avoiding relative movements between the cutting plate and the drill, the cutting member has that edge thereof which faces away from the cutting edge arranged in engagement with the bottom of the transverse slot, preferably approximately over the entire diameter of the drill shank.
  • a further increase in the strength of the drill can be realized by providing the transverse slot and/or the bolt symmetrically with regard to the end sections of the drilling dust grooves which end sections are provided on the drill head and in particular are approximately axis-parallel with regard to the drill. In this way also a more favorable drilling dust removal directly from the drill tip will be assured. This arrangement will be further improved when the end sections of the drilling dust grooves are located on both sides of the transverse slot and/or of the bolt at a distance from the bolt.
  • the respective cutting edge of the preferably multi-edged cutting member which may have one or more cutting edges, is formed by two cutting edges forming an acute angle with each other and located symmetrically with regard to the axis of the drill.
  • each cutting edge located approximately in the central plane of the cutting member is formed by inclined areas of the edges of the cutting member.
  • the cutting member has a support with a very large surface in the drill head when the edges are located toward the center of the cutting member and pertaining to the inclined surfaces of the cutting plate are located at the edges of the transverse slot so that only the inclined areas protrude. ln this way an optimum design can be obtained by having the drill head provided with a conical end the conical angle of which is preferably greater than the cutting edge angle of the cutting member and/or equals the angle between the two cutting edges of the cutting member.
  • the end sections of the drilling dust grooves extend into the conical end ofthe drill head while preferably its end edges are located directly adjacent to the edges of the transverse slot and approximately parallel thereto.
  • the conical end of the drill head is arranged in spaced relationship to the bolt on that side thereof which faces toward the cutting edge so that the bolt may be held in the drill shank over the entire diameter thereof.
  • the bottom of the transverse slot has a centering depression for engagement by a protrusion of the cutting member.
  • This centering depression may be formed, for instance, by a V-shaped formation of the bottom of the transverse slot so that a prism-shaped centering depression will be obtained.
  • the preferably plane bottom of the transverse slot extends approximately at a right angle to the axis of the drill, while preferably approximately in the center of the length of the drill the bottom has the centering depression which may, for instance, be of rectangular contour.
  • a corresponding projection on the cutting member is associated with the centering depression.
  • a particularly advantageous further development of the invention consists in that the cutting member which is approximately centrally symmetrical and designed as a reversible plate has at least two preferably diametrically oppositely located cutting edges so that one and the same cutting member, by being turned over, can be employed a plurality of times. If only two cutting edges are provided which are located opposite to each other. the edges of the reversible plate which interconnect the two cutting edges are shorter than the cutting edges so that the depth of the transverse slot need only be relatively small.
  • edges of the preferably hexagonal reversible plate are designed as cutting edges so that, for instance, three cutting blades with two cutting edges each are available.
  • the bolt may be used merely for preventing the loss of the cutting part, whereas when working with the drill the bolt has for all practical purposes not to absorb any forces because the drilling forces occurring during the working with the drill press the cutting part into the drill shank and, more specifically, into the transverse slot.
  • the cutting part protrudes laterally beyond the circumference of the drill head, preferably by less than the width of the inclined surfaces forming the cutting edges.
  • the drill illustrated therein comprises a drill shank l which is provided with a helical groove 2 for the drilling dust.
  • the drill has a drill head 3 in front of which the groove 2 ends in such a way that the drill head has a relatively large cross section.
  • the end 4 of the drill head 3 is conical with an obtuse angle.
  • the bottom 6 of slot 5 is, when viewed at a right angle to the lateral surfaces 7 of the slot 5, symmetrical with regard to the axis of the drill and is V-shaped with an obtuse angle.
  • the V-angle of bottom 6 substantially equals the conical angle of the end 4 of the drill head 3.
  • the bottom 6 of the transverse slot 5 is in cross section V-shaped with an acute angle.
  • a passage bore 8 the central axis of which intersects the axis of the drill.
  • the bore 8 is approximately in the middle between the tips of the end 4 of the drill head 3 and of the bottom 6 of the transverse slot 5 located in such a way that it is arranged outside the end 4 of the drill head 3 and, more specifically, in that section thereof which is substantially cylindrical.
  • Diagonally or diametrically on both sides of the transverse slot 5, two end sections 9, 10 of the groove 2 are located opposite to each other.
  • end sections 9, 10 are located symmetrically with regard to a common axial plane of the drill shank l in such a way that one leg 11 each of its rectangular V-shaped cross section is parallel to the central plane of the transverse slot 5 while the other leg 12 is located parallel to the central axis of bore 8.
  • the legs 11 are directly adjacent to the respective pertaining edge 13 which is formed by the corresponding lateral surface 7 of the transverse slot 5 and the conical mantle surface of the end 4 of the drill head 3, the legs .being parallel to the edge 13.
  • One groove end section 9 is angled off and merges with that end of the helical groove 2 which is adjacent the drill head 3, whereas the other groove section is located in spaced relationship to this end and merges with the helical groove 2.
  • a centrally symmetrical flat cutting plate 14 Inserted into the transverse slot 5 of the drill head 3 is a centrally symmetrical flat cutting plate 14 which has lateral surfaces 15 arranged parallel to each other and substantially over its entire surface engages the lateral surfaces 7 of the transverse slot 5.
  • the cutting plate 14 which in view forms a regular hexagon has six cutting edges 16 which form acute angles with each other and merge with each other. These cutting edges 16 are each formed by two flat portions 17 of the edges of the cutting plate 14, these edges being symmetrically arranged with regard to the central plane of the plate 14.
  • the flattened portions 17 form an acute angle with each other.
  • Each two adjacent cutting edges form the drill cutting edge 18 and the drill tip 19 which is located in the axis of the drill.
  • the cutting edges 16 which are parallel to each other are spaced from each other by a distance slightly greater than the diameter of the drill head 3 or drill shank 1 and in such a way that two cutting edges 16 each are provided slightly beyond the circumference of the drill head 3 and are located in an axis-parallel manner with regard to the drill.
  • the V-shape of the bottom 6 of the transverse slot 5 as well as its V-shaped cross section are so selected that with the cutting blade 14 inserted, two cutting edges 16 as well as their pertaining flattened portions 17 engage the bottom 6 substantially over their entire surface and thus form a centering protrusion 20 by means of which the cutting plate is secured against accidental lateral displacement in the transverse slot 5.
  • the inner edges 21 of the flattened portions 17 forming the cutting blade 18 are located over their entire length at the edges 13 of the transverse slot 5, whereas the inner edges 21 of the flattened portions 17 of the cutting edge 16 which is parallel to the axis of the drill are located within the lateral edges 22 of the transverse slot 5.
  • the cutting plate 14 has in its central axis a passage bore 23 the diameter of which is from 1.2 to 2.5 times greater than the diameter of the drill 8.
  • an elastic rubber sleeve 24 preferably under preload.
  • the inner bore of the rubber sleeve 24 has a diameter which substantially equals in size the bore 8 or is smaller than the latter.
  • the inner bore 25 is located coaxially with regard to the outer circumference of the sleeve 24.
  • Pin 26 is passed through bore 25 of the rubber sleeve 24 in such a way that the inner bore 25 of the rubber sleeve 24 is coaxial with the bore 8 so that the rubber sleeve 24 is braced in this direction toward the bottom 6 of the transverse slot 5. In this way the cutting plate 14 is pressed elastically against the bottom 6 of the transverse slot 5. After the pin 26 has been knocked out at least partially, the plate 14 can be removed from the transverse slot 5 and can then be turned about its axis and can again be inserted and secured by the pin 26 so that other cutting edges 16 of the cutting plate 14 will now form the cutting edge of the drill.
  • the axial extension of the rubber sleeve 24 is in thespecific embodiment shown in the drawings equalling the thickness of the cutting plate 14 while the rubber sleeve 24 may be adherently connected to the cutting plate 14.
  • the cutting plate 14 and the pin 26 are located relative to each other at a right angle and in a cross-like manner while the groove end sections 9, 10 are provided in two diametrically oppositely located corners of this cross in such a way that their lateral surfaces are arranged in spaced relationship to the cutting plate 14 and the pin 26.
  • the diameter of pin 26 is only slightly less than the thickness of the cutting plate 14.
  • groove end sections 9a, 10a in all four corners of the cross passing through the cutting plate 14a and the pin 26a there are provided groove end sections 9a, 10a in such a way that always two groove end sections 90, 10a are located diametrically opposite to each other and symmetrically to a common axial plane of the drill or drill head.
  • two helical drilling dust grooves instead of one groove for the drilling dust also two helical drilling dust grooves may be provided.
  • the cutting plate 14b is, in conformity with FIGS. 6 and 7, provided with only two cutting members 18b each having two cutting edges; 16b arranged at an angle with regard to each other. These two cutting members 18b are located opposite to each other and symmetrically with regard to a common axial plane of the cutting plate 14b.
  • the lateral edges 27 of the cutting plate 14b which interconnect the cutting members 18b are located parallel to each other and while being plane over the entire thickness of the cutting plate 14b are shorter than the cutting edges 16b.
  • the cutting plate 14c is provided with only one single cutting member 180. For this reason the cutting plate 14c is not designed as reversible plate.
  • the transverse slot 5c provided in the drill head 30 of the drill shank It" has a bottom 60 which is substantially plane and extends at a right angle with regard to the drill axis.
  • the bottom 60 is provided at the center of its length with a rectangular, circular or oval centering depression 28 which extends over the entire width of the transverse slot 5c.
  • the cutting plate is provided with a centering protrusion 20c which fits into the centering depression 28.
  • the arrangement is such that the cutting plate 14c rests on both sides of the centering protrusion 20c with its corresponding edge on the bottom 60 of the transverse slot 5c.
  • a passage bore 230 the diameter of which is approximately equal to the diameter of the passage bore 8: in the drill head 3c in such a way that the pin 26c is pressed directly into the cutting plate 140.
  • the distance between the pin 26c from the bottom 6c of the transverse slot 50 is with this embodiment smaller than the distance of the pin 26c from the cutting member 18c or from the cutting tip 19c.
  • FIGS. 11 and 12 differs from that of FIGS. 8 10 primarily in that the pin 26d which has the shape of a clamping pin is parallel to the plane of the cutting plate 14d while the cutting plate 14d has one lateral surface 15d provided with a groove 23d and the transverse slot 5d has the pertaining lateral surface 7d likewise provided with a groove 8d.
  • the grooves 23d, 8d form with the inserted cutting plate 14d a bore-like passage for the bolt 26d.
  • the depth of groove 9d is greater than half the diameter of the pin 26d to such an extentthat this groove can be designed as an undercut-groove and will alone suffice for guiding and holding the pin 26d pressed thereinto.
  • the radius of curvature of the cross section of groove 23d in the cutting blade 14d is slightly greater than the radius of curvature of the cross section of pin 26d, while the longitudinal central plane of groove 23d is furthermore slightly farther spaced from the bottom of the transverse slot d than is the longitudinal central plane of the groove 8d so that the pin 26:! substantially engages only that lateral surface of groove 23d under preload which is located toward the bottom of the transverse slot 5d, whereby the cutting plate 1411 is pressed against the bottom of the transverse slot 5d.
  • the drill shank 1d instead of being provided with drilling dust grooves, has two lateral axisparallel flattened portions 2d which are parallel to the cutting plate 14d and which extend over the entire length of the drill shank 1d up to the end of the drill head 3d.
  • the bottom surface 28e provided for engagement with the cutting plate l4e may also be formed by a separate insert member 29 consisting of hard metal.
  • the insert member 29 is arranged in the head 3e of the drill 1e.
  • the insert member 29 is likewise plate-shaped and has a thickness which approximately equals the thickness of the cutting plate 14e.
  • the insert member 29 is arranged in the transverse slot in the drill head 3e which thus is deeper by the height of the insert member 29.
  • the bottom surface 6e of this transverse slot which over its entire height has plane side walls, is in the shape of a pitch circle curved concavely while the axis of curvature is spaced from the drill head 3e and intersects at a right angle the axis of the drill head 3e so that the bottom surface 6e can be manufactured in a simple manner by a side milling cutter. That surface of the insert member 29 which over its entire surface engages the bottom surface 6e of the transverse slot is curved correspondingly so that the drill head 3e and the insert member 29 are centered relative to each other when the cutting plate Me is inserted.
  • the insert member 29 may, however, also be connected in the transverse slot by soldering, pressing. welding as well as by ultrasound or electron beam weldmg.
  • a drill shank having a working end, longitudinally extending dust groove means formed in said shank and extending along the shank from said working end, a transverse slot formed in the working end of said shank, a cutting plate formed of hard wear resistant material seated in said slot, and a retaining pin extending through said shank substantially perpendicular to the axis of said shank and also engaging said cutting plate and retaining said plate in said slot.
  • said pin being moveable in said shank in the axial direction of said pin to release said cutting plate from said slot
  • said cutting plate being polygonal when viewed in a direction perpendicular to the plane thereof, at least the axially outer end of the cutting plate having a point on the axis of the drill shank and inclining rearwardly from the point in, both directions when viewed perpendicular to the plane of the cutting plate, the said outer end of the cutting plate being bevelled on opposite sides to form cutting edges thereon, the working end of said shank being conical and tapering inwardly, there being a bottom and side edges of the open end of said slot meeting where the slot intersects the conical end of the shank being in about the planes of the bevels on the outer end of said cutting plate, the angle on the working end of the drill shank being greater than the angle between the bevels on the outer end of said cutting plate, said groove means in said shank comprising a terminal portion at the working end of said shank disposed immediately forward of the leading side of said
  • a drill according to claim 1 in which said pin is generally centrally located with respect to said cutting plate and is perpendicular to the plane of the cutting plate and extends through said cutting plate.
  • a drill according to claim 1 in which the axis of said pin intersects the axis of said shank.
  • a drill according to claim 1 in which said pin is disposed along said shank between the conical end thereof and the bottom of said slot.
  • a drill according to claim 1 in which said cutting plate is symmetrical about at least one central axis which is parallel to the plane of the cutting plate and perpendicular to the axis of the shank when the cutting plate is seated in said slot, each edge of the cutting plate facing away from said central axis having a cutting edge formed thereon, the bottom of said slot being formed for supportingly engaging the axially inner cutting edge while the axially outer cutting edge is in working position.
  • a drill according to claim 1 in which said slot is formed with a centering recess therein and said cutting plate has a protrusion thereon which engages said recess when the cutting plate is positioned in said slot.
  • a drill according to claim 7 in which the bottom of said slot is perpendicular to the axis of said shank and said centering recess is in the middle of the length of the bottom of said slot.
  • a drill according to claim 7 which includes a hard insert member in said slot and forming the bottom thereof.
  • a drill shank having a working end, longitudinally extending dust groove means formed in said shank and extending along the shank from said working end, a transverse slot formed in the working end of said shank, a cutting plate formed of hard wear resistant material seated in saidslot, and a retaining pin extending through said shank substantially perpendicular to the axis of said shank and also engaging said cutting plate and retaining said plate in said slot, said pin being moveable in said shank in the axial direction of said pin to release said cutting plate from said slot, the bottom of said slot being in the form of a segment of a cylinder having an axis disposed outwardly from the working end of the shank and intersecting the axis of the shank at a right angle.
  • a drill according to claim 10 in whichsaid shank has a transverse hole therein parallel tov the plane of said slot and offset laterally from the axis of said shank,
  • said pin closely fitting said hole and on one side extending into said slot, said cutting plate having a groove formed in the side facing said pin to receive said pin.
  • a drill according to claim .10 in which a groove is formed along one side ofsaid slot perpendicular to the axis of said shank, said cutting plate having a groove formed therein on the side facing the groove in the shank and in registration'therewith, said grooves forming a space to receive said pin.
  • a drill according to claim 10 in which said cutting plate is polygonal when viewed in a direction perpendicularto the plane thereof, at least the axially outer end of the cutting plate having a point on the axis of the drill shank and inclining rearwardly from the pointin both directions when viewed perpendicular to the plane of thecutting plate, the said outer end of the cutting plate being bevelled on opposite sides to form cutting edges thereon, the working end of said shank being conical and tapering inwardly, the side edges of the open end of said slot meeting where the slot intersects the conical end of the shank being in about the planes of the bevels on the outer end of said cutting plate.
  • a drill according to claim 10 in which said cutting plate when viewed perpendicular to the plane thereof is a regular polygon, all of the edges of said cutting plate being bevelled to form a cutting edge extending about'the entire periphery of said cutting plate, said I plate being angularly indexable in said slot for successively presenting different regions of the periphery thereof to working position.
  • a drill according to claim 10 in which said cutting plate protrudes laterally beyond the limits of said shank. the protruding regions of said cutting plate being bevelled.
  • a drill shank having a working end, longitudinally extending dust groove means formed in said shank and extending along the shank from said working end, a transverse slot formed in the working end of said shank, a cutting plate formed of hard wear resistant material seated in said slot, a retaining pin extending through said shank substantially perpendicular to the axis of said shank and also engaging said cutting plate and retaining said plate in said shallow than the groove in said shank.
  • a drill according to claim 17 in which said pin is offset from the center of said cutting plate for preload toward the bottom of said slot.
  • a drill according to claim 17 in which said cutting plate has a central hole, an elastic bushing member in said hole, said pin extending perpendicular to the plane of said cutting plate and through said elastic bushing member.
  • a drill according to claim 17 in which said pin is radially resilient and has a diameter slightly less than the thickness of said cutting plate.
  • a drill according to claim 17 in which said cutting plate engages the bottom of said slot across the entire diameter of said shank.
  • said dust groove means comprises at least one helical groove formed in the drill shank, said helical groove extending to near the working end of the shank, a pair of diametrally opposed ax-ial grooves formed in said shank and extending from the working end thereof to and intersecting said helical groove, the plane of said axial grooves being at an angle of about 45 degrees to the plane of said cutting plate.
  • a drill according to claim 17 in which said dust groove means comprises at least one helical groove formed in the drill shank, said helical groove extending to near the working end of the shank, and an axial groove formed in the drill shank and extending from the working end of the shank to and intersects the said helical groove to form a continuous passage for dust.
  • a drill for masonry and rock a drill shank having a working end. longitudinally extending dust groove means formed in said shank and extending along the shank from said working end, a transverse slot formed in the working end of said shank, a cutting plate formed of hard wear resistant material seated in said slot, and a retaining pin extending through said shank substantially perpendicular to the axis of said shank and also engaging said cutting plate and retaining said plate in said slot, said pin being moveable in said shank in the axial direction of said pin to release said cutting plate from said slot, said cutting plate being symmetrical about at least one central axis which is parallel to the plane of the cutting plate and perpendicular to the axis of the shank when the cutting plate is seated in said slot, each edge of the cutting plate facing away from said central axis having a cutting edge formed thereon.
  • the bottom of said slot being formed for supportingly engaging the axially inner cutting edge while the axially outer cutting edge is in working position, the cutting edges of said cutting plate being V-shaped and bevelled and the edges of the cutting plate perpendicular to said central axis being shorter than the other edges of the cutting plate.
  • a drill for masonry and rock having a working end, longitudinally extending dust groove means formed in said shank and extending along the shank from said working end, a transverse slot formed in the working end of said shank, a cutting plate formed of hard wear resistant material seated in said slot, and a retaining pin extending through said shank substantially perpendicular to the axis of said shank and also engaging said cutting plate and retaining said plate in said slot, said pin being moveable in said shank in the axial direction of said pin to release said cutting plate from said slot, said cutting plate when viewed perpendicular to the plane thereof being a regular polygon, all of the edges of said cutting plate being bevelled to form a cutting edge extending about the entire periphery of said cutting plate, said plate being angularly indexable in said slot for successively presenting different regions of the periphery thereof to working position, said cutting plate being hexagonal and when seated in said slot having a pair of edges parallel to the axis of the
  • a drill according to claim 28 in which said pair of edges protrude beyond the shank at the sides a distance about equal to the height of the bevels thereon.

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US349611A 1972-04-07 1973-04-09 Drill, especially rock drill Expired - Lifetime US3878905A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2216760A DE2216760C2 (de) 1972-04-07 1972-04-07 Gesteinsbohrer

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US3878905A true US3878905A (en) 1975-04-22

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US349611A Expired - Lifetime US3878905A (en) 1972-04-07 1973-04-09 Drill, especially rock drill

Country Status (11)

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US (1) US3878905A (ko)
JP (1) JPS5937390B2 (ko)
AT (1) AT328352B (ko)
BE (1) BE797749A (ko)
CH (1) CH571644A5 (ko)
DE (1) DE2216760C2 (ko)
FR (1) FR2179120B3 (ko)
GB (1) GB1432612A (ko)
IT (1) IT983686B (ko)
LU (1) LU67372A1 (ko)
NL (1) NL7304939A (ko)

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4047826A (en) * 1976-05-17 1977-09-13 Bennett John T Drill having indexable replaceable insert tip
US4060335A (en) * 1975-07-14 1977-11-29 Amtel, Inc. Spade drill
US4079796A (en) * 1976-03-22 1978-03-21 Arnol Staggs Cutting machine and augering tool
US4324057A (en) * 1978-06-21 1982-04-13 White Kenneth M Pin type tooth retention system
US4475851A (en) * 1982-02-26 1984-10-09 General Electric Company Inserts for cutting tools
US4488840A (en) * 1982-07-08 1984-12-18 Pollington Bernard M Rotary cutting tool
US4506464A (en) * 1982-09-10 1985-03-26 Cartner Jack O Hydraulic breakaway system for mobile cutting apparatus
US4527931A (en) * 1983-05-27 1985-07-09 Gte Laboratories Incorporated Indexable insert for mining drill
US4558975A (en) * 1982-02-26 1985-12-17 General Electric Company Drill with disposable inserts
US4612715A (en) * 1982-09-10 1986-09-23 Cartner Jack O Ditching apparatus with improved ditching blade
US4712320A (en) * 1984-04-16 1987-12-15 Cartner Jack O Four-way reversible ditcher blades
US5259707A (en) * 1992-08-17 1993-11-09 Keller Dale L Spot drill with indexable replaceable insert
WO1997019247A1 (de) * 1995-11-23 1997-05-29 Techmo Entwicklungs- Und Vertriebs Gmbh Bohrkrone
US5996714A (en) * 1997-07-15 1999-12-07 Kennametal Inc. Rotatable cutting bit assembly with wedge-lock retention assembly
US6044920A (en) * 1997-07-15 2000-04-04 Kennametal Inc. Rotatable cutting bit assembly with cutting inserts
US6176332B1 (en) 1998-12-31 2001-01-23 Kennametal Inc. Rotatable cutting bit assembly with cutting inserts
US6220795B1 (en) 1999-04-05 2001-04-24 Vermont Indexable Tooling, Inc. Spotting drill and milling cutter
US6241433B1 (en) * 1998-12-22 2001-06-05 Seco Tools Ab Tool and cutting head for cutting machining
US20040112648A1 (en) * 2002-12-12 2004-06-17 Sollami Phillip A. Drill blades for drill bit
KR100441964B1 (ko) * 2001-10-17 2004-07-27 대구텍 주식회사 블레이드(Ｂｌａｄｅ)형 쓰로어웨이 드릴
WO2006114306A1 (en) * 2005-04-28 2006-11-02 Irwin Industrial Tool Company A/S A drilling tool
CN102528942A (zh) * 2011-12-28 2012-07-04 福建万龙金刚石工具有限公司 一种高效金刚石钻头及生产工艺
EP2532461A1 (en) * 2011-06-10 2012-12-12 Seco Tools Ab Cutting insert having a plurality of cutting elements thereon and cutting tool therefor
US20130032406A1 (en) * 2011-08-02 2013-02-07 Halliburton Energy Services, Inc. Systems and Methods for Drilling Boreholes with Noncircular or Variable Cross-Sections
US20140212227A1 (en) * 2013-01-25 2014-07-31 Michael Bitner Two sided milling tool cutter insert and holder
US11076146B1 (en) 2009-06-17 2021-07-27 3Shape A/S Focus scanning apparatus
CN113573979A (zh) * 2019-03-18 2021-10-29 帕尔夫知识产权私人有限公司 提升转子的转子叶片
US11701208B2 (en) 2014-02-07 2023-07-18 3Shape A/S Detecting tooth shade

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2560621C3 (ko) * 1975-07-14 1990-05-10 Santrade Ltd., Luzern, Ch
JPS62263384A (ja) * 1986-05-02 1987-11-16 Ain Eng Kk シ−ト
JP6193717B2 (ja) * 2013-10-16 2017-09-06 株式会社サン機工 超硬工具

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US395034A (en) * 1888-12-25 coffin
US994668A (en) * 1908-09-14 1911-06-06 Wallace Childs Bit for rock-drills, moils, and picks.
US2205238A (en) * 1939-06-19 1940-06-18 Joseph H Burt Cable tool
US2575239A (en) * 1950-06-13 1951-11-13 Marathon Coal Bit Company Inc Reversible bit and holder therefor
US2888247A (en) * 1955-12-13 1959-05-26 Sandvikens Jernverks Ab Rock drill cutting insert of sintered hard metal
US2902260A (en) * 1957-07-16 1959-09-01 Carl V Tilden Drill bit
US3052310A (en) * 1959-08-31 1962-09-04 Robert B Kinzbach Combined reamer and drill string stabilizer
US3089552A (en) * 1961-10-24 1963-05-14 Mine Safety Appliances Co Rock drill tip holder
US3330601A (en) * 1963-07-08 1967-07-11 Austin Hoy & Co Ltd Cutter tools and tool-boxes therefor
US3672455A (en) * 1970-04-14 1972-06-27 Tarton Ind Inc Drag bits

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE361037C (de) * 1922-10-09 Concordia Ind Ges M B H Schlangenbohrer mit Einsatzschneide
DE373642C (de) * 1923-04-14 Berlin Anhaltische Maschb Act Schlangenbohrer mit zwischen den Aussenzaehnen sitzendem Brechzahn
DE351237C (de) * 1920-05-04 1922-04-05 Andor Von Vargyas Knopfputzgeraet
AT88310B (de) * 1920-08-24 1922-05-10 Alfred Stapf Gesteinsbohrer.
DE366837C (de) * 1922-05-07 1923-01-12 Ernst Stahlberg Gesteinbohrer mit auswechselbarer Bohrerklinge
GB794623A (en) * 1955-03-15 1958-05-07 Internat Drill Corp Proprietar A new bit for pneumatic rock drills
JPS4112144Y1 (ko) * 1963-03-07 1966-06-07
GB1008029A (en) * 1963-09-02 1965-10-22 John M Perkins & Smith Ltd Drill bits
JPS4533843Y1 (ko) * 1966-11-18 1970-12-24

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US395034A (en) * 1888-12-25 coffin
US994668A (en) * 1908-09-14 1911-06-06 Wallace Childs Bit for rock-drills, moils, and picks.
US2205238A (en) * 1939-06-19 1940-06-18 Joseph H Burt Cable tool
US2575239A (en) * 1950-06-13 1951-11-13 Marathon Coal Bit Company Inc Reversible bit and holder therefor
US2888247A (en) * 1955-12-13 1959-05-26 Sandvikens Jernverks Ab Rock drill cutting insert of sintered hard metal
US2902260A (en) * 1957-07-16 1959-09-01 Carl V Tilden Drill bit
US3052310A (en) * 1959-08-31 1962-09-04 Robert B Kinzbach Combined reamer and drill string stabilizer
US3089552A (en) * 1961-10-24 1963-05-14 Mine Safety Appliances Co Rock drill tip holder
US3330601A (en) * 1963-07-08 1967-07-11 Austin Hoy & Co Ltd Cutter tools and tool-boxes therefor
US3672455A (en) * 1970-04-14 1972-06-27 Tarton Ind Inc Drag bits

Cited By (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4060335A (en) * 1975-07-14 1977-11-29 Amtel, Inc. Spade drill
US4079796A (en) * 1976-03-22 1978-03-21 Arnol Staggs Cutting machine and augering tool
US4047826A (en) * 1976-05-17 1977-09-13 Bennett John T Drill having indexable replaceable insert tip
US4324057A (en) * 1978-06-21 1982-04-13 White Kenneth M Pin type tooth retention system
US4475851A (en) * 1982-02-26 1984-10-09 General Electric Company Inserts for cutting tools
US4558975A (en) * 1982-02-26 1985-12-17 General Electric Company Drill with disposable inserts
US4488840A (en) * 1982-07-08 1984-12-18 Pollington Bernard M Rotary cutting tool
US4506464A (en) * 1982-09-10 1985-03-26 Cartner Jack O Hydraulic breakaway system for mobile cutting apparatus
US4612715A (en) * 1982-09-10 1986-09-23 Cartner Jack O Ditching apparatus with improved ditching blade
US4527931A (en) * 1983-05-27 1985-07-09 Gte Laboratories Incorporated Indexable insert for mining drill
US4712320A (en) * 1984-04-16 1987-12-15 Cartner Jack O Four-way reversible ditcher blades
US5259707A (en) * 1992-08-17 1993-11-09 Keller Dale L Spot drill with indexable replaceable insert
WO1997019247A1 (de) * 1995-11-23 1997-05-29 Techmo Entwicklungs- Und Vertriebs Gmbh Bohrkrone
US5996714A (en) * 1997-07-15 1999-12-07 Kennametal Inc. Rotatable cutting bit assembly with wedge-lock retention assembly
US6044920A (en) * 1997-07-15 2000-04-04 Kennametal Inc. Rotatable cutting bit assembly with cutting inserts
US6109377A (en) * 1997-07-15 2000-08-29 Kennametal Inc. Rotatable cutting bit assembly with cutting inserts
US6260638B1 (en) 1997-07-15 2001-07-17 Kennametal Pc Inc. Rotatable cutting bit assembly with wedge-lock retention assembly
US6241433B1 (en) * 1998-12-22 2001-06-05 Seco Tools Ab Tool and cutting head for cutting machining
US6176332B1 (en) 1998-12-31 2001-01-23 Kennametal Inc. Rotatable cutting bit assembly with cutting inserts
US6220795B1 (en) 1999-04-05 2001-04-24 Vermont Indexable Tooling, Inc. Spotting drill and milling cutter
KR100441964B1 (ko) * 2001-10-17 2004-07-27 대구텍 주식회사 블레이드(Ｂｌａｄｅ)형 쓰로어웨이 드릴
US20040112648A1 (en) * 2002-12-12 2004-06-17 Sollami Phillip A. Drill blades for drill bit
US6968912B2 (en) * 2002-12-12 2005-11-29 The Sollami Company Drill blades for drill bit
CN101166885B (zh) * 2005-04-28 2013-04-24 爱尔文工业工具公司 钻孔工具
WO2006114306A1 (en) * 2005-04-28 2006-11-02 Irwin Industrial Tool Company A/S A drilling tool
US11671582B2 (en) 2009-06-17 2023-06-06 3Shape A/S Intraoral scanning apparatus
US11368667B2 (en) 2009-06-17 2022-06-21 3Shape A/S Intraoral scanning apparatus
US11831815B2 (en) 2009-06-17 2023-11-28 3Shape A/S Intraoral scanning apparatus
US11622102B2 (en) 2009-06-17 2023-04-04 3Shape A/S Intraoral scanning apparatus
US11539937B2 (en) 2009-06-17 2022-12-27 3Shape A/S Intraoral scanning apparatus
US11076146B1 (en) 2009-06-17 2021-07-27 3Shape A/S Focus scanning apparatus
EP2532461A1 (en) * 2011-06-10 2012-12-12 Seco Tools Ab Cutting insert having a plurality of cutting elements thereon and cutting tool therefor
US9217287B2 (en) * 2011-08-02 2015-12-22 Halliburton Energy Services, Inc. Systems and methods for drilling boreholes with noncircular or variable cross-sections
US20130032406A1 (en) * 2011-08-02 2013-02-07 Halliburton Energy Services, Inc. Systems and Methods for Drilling Boreholes with Noncircular or Variable Cross-Sections
CN102528942A (zh) * 2011-12-28 2012-07-04 福建万龙金刚石工具有限公司 一种高效金刚石钻头及生产工艺
CN102528942B (zh) * 2011-12-28 2014-03-05 福建万龙金刚石工具有限公司 一种高效金刚石钻头
US20140212227A1 (en) * 2013-01-25 2014-07-31 Michael Bitner Two sided milling tool cutter insert and holder
US11701208B2 (en) 2014-02-07 2023-07-18 3Shape A/S Detecting tooth shade
US11707347B2 (en) 2014-02-07 2023-07-25 3Shape A/S Detecting tooth shade
US11723759B2 (en) 2014-02-07 2023-08-15 3Shape A/S Detecting tooth shade
US20220177122A1 (en) * 2019-03-18 2022-06-09 Pal-V Ip B.V. Rotor Blades Of A Lift Rotor
CN113573979A (zh) * 2019-03-18 2021-10-29 帕尔夫知识产权私人有限公司 提升转子的转子叶片

Also Published As

Publication number Publication date
NL7304939A (ko) 1973-10-09
BE797749A (fr) 1973-07-31
IT983686B (it) 1974-11-11
DE2216760A1 (de) 1973-10-18
CH571644A5 (ko) 1976-01-15
FR2179120B3 (ko) 1976-03-26
GB1432612A (en) 1976-04-22
FR2179120A1 (ko) 1973-11-16
DE2216760C2 (de) 1982-11-11
JPS5937390B2 (ja) 1984-09-10
JPS4916601A (ko) 1974-02-14
ATA266873A (de) 1975-05-15
AT328352B (de) 1976-03-25
LU67372A1 (ko) 1973-06-18

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