WO2016038021A1 - MEIßEL, INSBESONDERE RUNDSCHAFTMEIßEL - Google Patents
MEIßEL, INSBESONDERE RUNDSCHAFTMEIßEL Download PDFInfo
- Publication number
- WO2016038021A1 WO2016038021A1 PCT/EP2015/070474 EP2015070474W WO2016038021A1 WO 2016038021 A1 WO2016038021 A1 WO 2016038021A1 EP 2015070474 W EP2015070474 W EP 2015070474W WO 2016038021 A1 WO2016038021 A1 WO 2016038021A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- chisel
- bit
- cutting
- region
- head
- Prior art date
Links
- 238000005520 cutting process Methods 0.000 claims abstract description 156
- 239000000463 material Substances 0.000 claims abstract description 97
- 238000000576 coating method Methods 0.000 claims description 26
- 239000011248 coating agent Substances 0.000 claims description 24
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 description 55
- 239000002689 soil Substances 0.000 description 12
- 239000011435 rock Substances 0.000 description 5
- 125000006850 spacer group Chemical group 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 238000005476 soldering Methods 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 230000032258 transport Effects 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 238000004026 adhesive bonding Methods 0.000 description 3
- 239000007779 soft material Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002028 premature Effects 0.000 description 2
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- -1 for example Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000003027 oil sand Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000012858 resilient material Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/18—Mining picks; Holders therefor
- E21C35/183—Mining picks; Holders therefor with inserts or layers of wear-resisting material
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/18—Mining picks; Holders therefor
- E21C35/19—Means for fixing picks or holders
- E21C35/197—Means for fixing picks or holders using sleeves, rings or the like, as main fixing elements
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
- E21C25/06—Machines slitting solely by one or more cutting rods or cutting drums which rotate, move through the seam, and may or may not reciprocate
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/18—Mining picks; Holders therefor
- E21C35/183—Mining picks; Holders therefor with inserts or layers of wear-resisting material
- E21C35/1835—Chemical composition or specific material
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/18—Mining picks; Holders therefor
- E21C35/183—Mining picks; Holders therefor with inserts or layers of wear-resisting material
- E21C35/1837—Mining picks; Holders therefor with inserts or layers of wear-resisting material characterised by the shape
Definitions
- the invention relates to a chisel, in particular a round shank bit for use on a cutting roller, with a chisel head and a chisel shank for holding the chisel in a chisel holder, the chisel head of the chisel having at least one cutting area.
- This chisel consists of a chisel head and a chisel shaft in the form of a round shank.
- Chisel head and chisel shaft are constructed rotationally symmetric about a central longitudinal axis of the chisel.
- the transition of the chisel head to the chisel shaft is designed as a collar, which forms the largest outer diameter of the chisel head.
- the chisel head tapers towards a chisel tip.
- the chisel tip is formed by a carbide insert.
- the chisel is at his chisel Shaft held by means of a clamping sleeve in a corresponding receptacle of a chisel holder.
- the clamping sleeve engages in such a circumferential groove in the drill collar, that the bit is held in the axial direction, but can rotate about its central longitudinal axis. This is advantageous in that the bit wears evenly during use from all sides.
- Such chisels are used for example on rotating cutting rollers of so-called surface miners for the removal of rock and soil in large opencast mining.
- the space material is comminuted by the chisel attached to the cutting roller and transported by the movement of the cutting roller to an ejector, where it is then removed, for example by a loading tape system.
- a disadvantage of the chisels described is their low due to their shape transport performance especially for softer space materials, such as oil sands.
- the object of the invention is achieved in that directly or indirectly adjoining the cutting region a planar and / or gauged ejection region is arranged in a central region of the chisel head. Through the cutting area, the soil or the rock is broken up and crushed. The flat overlay area grasps the space material and transports it in the feed direction of the chisel and the cutting roller.
- the areal configuration of the ejection region also reliably detects finely comminuted, plastically deformable or sandy spacer material and, following the rotation of the cutting roller, transports it in large quantity to an ejector.
- a high cutting performance and at the same time a high tool life of the bit is achieved by the fact that the cutting area at least one on a the chisel shaft ask- have turned end of the bit on a in the direction of a feed direction (V) aligned front of the bit head mounted cutting element of a hard material, in particular tungsten carbide, and / or that the ejection area at least one plate-shaped hard material element, in particular of hard metal, which directly or indirectly to the cutting element connects, has.
- the cutting element and the plate-shaped hard material element protect the area of the chisel head arranged behind it from abrasive wear. In this case, a particularly high wear resistance is achieved if the hard material element directly adjoins the cutting element, so that there is no gap between the elements on which the space material can attack.
- a deflection region is arranged, which extends to the front of the chisel, and that by the cutting area, the ejection area and the deflection formed schaufeiförmige, towards the front of the chisel trough.
- plastically deformable space material in the cutting region is removed by the depression and formed in the shape of a ball or roller over the ejection region and the deflection region. The thus formed material is further transported through the ejection area and thereby held by the deflection.
- Sandy space material is held by the deflection in the trough.
- the abrasive wear of the bit head can be further reduced by having the bit head having a support portion disposed in the cutting area and the ejection area, and the support portion having side lands arranged in the cutting area and / or the ejection area on both sides of the support portion. their mutual distance decreases, starting from the front towards a back of the bit.
- the support portion thus tapers in width, starting from the front of the bit directly exposed to the spacer material, towards the rear side thereof. Due to the undercut thus formed, the lateral connection surfaces are only one exposed to reduced mechanical stress by the space material.
- the heavily loaded front can, as described, be protected by cutting and hard material elements, so that long service life of the chisel can be achieved.
- a further advantage results from the fact that a chisel formed in this way can be moved more easily through the soil. This reduces the power to be applied to the movement of the cutting roller, whereby energy can be saved.
- the cutting element is formed from a fastening piece oriented toward the front side of the bit and a projection directed towards the rear side of the bit such that the cutting element forms a cutting edge at the extreme end of the bit head and the cutting element, starting from the cutting edge, forms a discharge surface towards the attachment piece and forms an open space towards the attachment.
- the mechanically heavily loaded cutting edge and the immediately adjacent to the cutting edge, also mechanically heavily loaded areas are thus protected by a hard material against increased wear. This leads to a significant increase in the service life of the chisel head.
- a secure attachment of the cutting element to the support portion can be achieved in that the attachment piece forms a contact surface and the approach a support portion and that the cutting element by means of a material connection between the contact surface and a contact area and / or between the support portion and a support portion of the support portion of this is held.
- the cohesive connection can be produced for example by gluing or preferably by soldering. This results in a particularly stable connection, if both between the contact surface and the contact area as well as between the support portion and the support area such a connection is made. By such a two-sided attachment can continue to reduce the risk of breakage of the cutting element.
- the service life of the chisel head can be extended by coating the chisel head in the cutting region, in the ejection region and / or in the deflection region with a wear protection coating, in particular with an armored welding.
- a wear protection coating in particular with an armored welding.
- the deflecting region adjoining the ejection region can be provided with a wear protection coating towards the front of the chisel head and thus protected.
- the wear protection coating is spaced apart at least by a minimum distance the cutting element and / or the hard material element bearing areas of the support portion is applied.
- the wear protection coating when applying the wear protection coating as armored welding very high temperatures are achieved in the welding area. By the minimum It is avoided that the cutting element, the hard material element or its bearing surfaces are exposed on the support section to high temperatures and thereby destroyed or deformed.
- a high cutting performance with low, transmitted to the bit head torsional forces can be achieved in that the cutting edge of the cutting element in the direction along a central longitudinal plane (M) of the chisel, the surface normal points towards the front of the chisel, in particular that the Cutting edge along the central longitudinal plane (M) of the bit is arranged.
- the cutting element on the front side has a discharge surface, which is bulbous, in particular convex, shaped and / or that the discharge surface has a front-facing edge with a first outer angle and / or that the cutting edge a cutting tip having a second outer angle and / or that the free surfaces has an edge with a third outer angle and / or that the outer angles are arranged over a longitudinally extending from the front to the rear second central longitudinal plane of the bit.
- the bulbous discharge surface the cutting element is reinforced in a particularly highly abrasion-loaded area such that the service life of the cutting element can be significantly increased.
- a discharge surface which along the central longitudinal plane has a forwardly pronounced edge.
- the space material Due to the bulbous shape, the space material is increasingly transported to the ejection area. Due to the edge, the movement of the spacer material additionally receives a lateral component, so that it is more evenly distributed in the ejection area.
- the chisel penetrates more easily into harder ground and rocks. In this case, not transported away space material can be pushed by an also provided with an outer edge of open space to the side.
- a cutting element with an edge arranged along the center longitudinal plane running from the front to the back of the bit shows better cutting and clearing results with harder material, while a convex shaped cutting element better for soft and plastically deformable soil is suitable. Chisels with cutting elements with an outer edge can therefore be used for example in winter in frozen soil, while chisels are provided with bulbous cutting edges in the summer.
- the chisel according to the invention has a defined front and rear side.
- the drill collar is designed as a round shank and that the drill shank has at least one form-locking element which is suitable for cooperating with a form-fitting counter-element of the chisel holder or for the chisel holder the chisel holder fixable locking piece can be assigned as positive locking counter-element and that the chisel with the interlocking element to the positive locking counter-element is secured against rotation.
- the chisel is held so despite his round chisel shaft against rotation in the chisel holder.
- the bit in the same chisel holders as known round shank chisel with symmetrical chisel head, which rotate in operation about its central longitudinal axis, are held.
- a cutting roller depending on the material to be removed material with known rotating bits or equipped with blocked chisels.
- the bit head has a support body on the side of the bit shaft and that the support body is closed by a support surface which projects radially beyond the bit shaft.
- the support surface is thus located on a chisel receiving circumferential end face of the chisel holder.
- the material flow of the space material is significantly influenced by the shape of the trough of the chisel head.
- the material shredded by the cutting element can be transported away efficiently by forming a deflecting surface by means of the deflecting region, which leads from the ejection region to the front side of the chisel head and the deflecting surface, starting from a center region of the chisel head toward the front side, in the direction of the chisel head Chisel shaft drops. Due to the deflection of the underlying support body is covered and protected. A high mechanical protection is present in particular when the deflection surface is provided with a wear protection coating.
- FIG. 1 shows a side view of a chisel for removing comparatively soft material
- Figure 2 is a side view of the upper end of a chisel head of the in FIG.
- FIG. 3 shows a perspective rear view of the chisel of FIG. 1,
- FIG. 4 shows a side view of a second bit for removing comparatively harder material
- FIG. 5 shows a perspective rear view of the second bit from FIG. 4, FIG.
- FIG. 6 shows a further perspective rear view of the bit from FIG. 1, 7 shows a section through a bit holder according to a sectional area shown in Figures 1 and 4 and
- FIG. 8 shows a section of the chisel shown in FIGS. 1 and 4 in the region of a blocking piece.
- Figure 1 shows a side view of a chisel 10 for the removal of relatively soft material, in particular oil sands or other plastically deformable or sandy soil.
- the chisel 10 has a chisel head 20 and a chisel shaft 40 integrally formed thereon, wherein the chisel shaft 40 is substantially in the form of a cylindrical round shank 42.
- the chisel head 20, facing the drill shank 40 has a support body 27, which merges into a support section 23.
- the support portion 23 forms a to a front side 20.1 of the bit 10 and the chisel head 20 out aligned, shovel-shaped trough 20.6.
- the chisel head 20 is divided along the shuttle-shaped depression 20.6 into three regions marked by double arrows, namely into a front cutting region 20.3, a middle ejection region 20.4 and a rear deflection region 20.5.
- two juxtaposed cutting elements 30 are fastened to the carrier section 23 toward the front 20.1 of the chisel head 20, as can be seen more clearly in FIG.
- two plate-shaped hard material elements 28 arranged next to one another cover the support section 23 lying behind.
- a deflecting surface 24.5 provided with a wear protection coating 29 is arranged, which extends through a corresponding, slightly curved shape from the plane of the ejection region 20.4 formed by the hard material elements 28 to the front side 20.1 of the chisel head 20.
- the deflection surface 24.5 is aligned such that it drops from the transition to the ejection region 20.4 toward the front end of the chisel head 20.
- the support section 23 forms upper and lower lateral connecting surfaces 25.1, 25.2.
- the lateral connection surfaces 25. 1, 25. 2 are provided with a wear protection coating 29.
- the lateral connection surfaces 25. 1, 25. 2 adjoin the cutting elements 30 and hard material elements 28 laterally in their front regions.
- the mutual distance of the opposite on the two sides of the chisel head 30 side connecting surfaces 25.1, 25.2 is reduced to a back 20.2 of the bit 10 and the chisel head 20 back.
- the cutting element 30 is substantially L-shaped from a mounting piece 36 and an integrally formed thereon at an angle to the back 20.2 of the chisel head 20 approach 32 formed.
- the attachment piece 36 may have a bulging discharge surface 37, which merges into a cutting edge 31 at the outermost end of the cutting element 30 and thus of the chisel head 20.
- an obliquely sloping free surface 33 is formed by the projection 32, which is aligned counter to a feed direction V of the chisel 10.
- the attachment piece 36 Opposite to the discharge surface 37, the attachment piece 36 has a contact surface 35 which is at an angle to a support portion 34 arranged opposite the clearance surface 33.
- the abutment surface 35 and the support portion 34 are applied to a contact region 24.2 and a support portion 24.1 of the support portion 23 and connected thereto by a fabric connection produced by, for example, soldering. Alternatively, the material connection can also be made by gluing.
- the support section 23 has a connection surface 26. 1 which is likewise provided with a wear protection coating 29 and which merges into a rounding region 26. 2 of the support section 23.
- connection surface 26.1 merges into the alignment of the outer surface of the support body 27 running along the direction of a central longitudinal plane M.
- the block-shaped hard material elements 28 are attached directly after the cutting elements 30 on the front side 20. 1 of the chisel head 20.
- the hard material elements 28 with their rear side with a mounting plane 24.4 of the support portion 23 are materially connected by soldering in the present embodiment, alternatively by gluing.
- a step-shaped positioning edge 24.3 is provided between the contact region 24.2 and the fastening plane 24.4, against which the hard material element 28 rests with its upper end side.
- the wear protection coating 29 of the lateral connection surfaces 25.1, 25.2, the connection surface 26.1 and the deflection surface 24.5 is spaced apart by a minimum distance from the cutting element 30 or the hard material element 28.
- the end of the chisel head 20 opposite the cutting element 30 is formed by the cylindrical support body 27, which merges into the chisel shank 40 in one piece.
- the drill collar 40 radially projecting support surface 27.1 of the support body 27 to the round shaft 42, a cylindrical round shaft 42 rotating, conical centering 41 is provided.
- the round shank 42 is adjoined by a conical tapering region 43, to which a positive locking element in the form of a blocking pin 44 is integrally formed.
- the blocking pin 44 has on the two lateral surfaces and on the back side of the pin surfaces 44.1 and the front 20.1 a Zapfenrundung 44.2.
- the chisel shaft 40 is closed at the end by a disk-shaped end piece 46, which is separated by a groove 45 from the blocking pin 44.
- bit 10 is held in a bit holder 50 via its tool shank 40.
- bit holder 50 is shown in a sectional view.
- the bit holder 50 has a holding region 54 towards the chisel head 20 and a base part 56 opposite it. He possesses a cylindrical basic form, which in a the chisel head 20 facing region is tapered by a slope 53.
- the bevel 53 passes over a rounded edge in a transversely to the central longitudinal axis of the chisel 10 aligned end face 51 on which the support surface 27.1 of the chisel head 20 is applied.
- the end face 51 Toward the drill collar 40, the end face 51 has a centering recess 52 in the form of a chamfer adapted to the centering section 41 of the chisel 10.
- the centering portion 41 forms the conclusion of a arranged in the holding portion 54 of the chisel holder 50 chisel holder 55.
- the chisel holder 55 is the contour of the round shank 42 of the chisel shank 40 following executed as a cylindrical bore.
- the base part 56 of the chisel holder 50 forms a partially enclosed through the mounting opening 56.3 and towards the end side of the chisel holder 50 through a front wall 56.5 oriented toward the front 20.1 and a rear mounting opening 56.3 Cavity 57 off.
- the mounting opening 56.3 is bounded by end surfaces 56.4 of the approximately semicircular front wall 56.5, wherein the end surfaces 56.4, starting from the holding portion 54 of the chisel holder 50, are arranged to the lower end of the base member 56 extending obliquely to the front side 20.1 of the chisel holder 50.
- the cavity 57 itself is limited to the front side 20.1 through the front wall 56.5 with its approximately semicircular front wall surface 56.1, the laterally in two to the mounting opening 56.3 towards straight opening side wall surfaces 56.2 go over, as shown more clearly in one along with VII marked section line extending sectional view in Figure 7 is shown.
- the blocking pin 44 of the drill collar 40 is fixed in a blocking piece 60 shown in a sectional view.
- the blocking piece 60 is held in the axial direction thereof by a clamping element 70, which engages in the groove 45 of the tool shank 40.
- the blocking piece 60 forms a form-locking connection both with respect to the bit holder 50 and with respect to the blocking pin 44, which rotation of the bit 10 about its central longitudinal axis prevented.
- the blocking pin 44 is held in an opening 64 of the blocking piece 60.
- the bit holder 50 is not shown with its front 20.1 welded to a cutting roller.
- the chisel 10 is inserted with its chisel shank 40 in the chisel holder 55 that blocking piece 60 plugged onto the blocking pin 44 and the clamping element 70 is clamped in the groove 45.
- the orientation of the blocking piece 10 is predetermined by its outer contour and the contour of the cavity 57. Due to the shape of the blocking pin 44 and the opening 64 of the blocking piece 60, the orientation of the chisel 10 is also fixed so that its front side 20. 1 points in the feed direction V of the cutting roller and thus of the chisel 10.
- the axial direction of the chisel 10 is determined by the support of the chisel head 20 with its support surface 27.1 on the end face 51 of the chisel holder 50 and by engaging in the groove 45 clamping member 70.
- the chisel 10 designed as a round shank chisel is thus held against rotation in the chisel holder 50.
- the bit 10 is driven by the rotation of the cutting roller in the feed direction V through the soil to be degraded.
- the front cutting edge 31 engages in the soil and crushed this.
- the soil is removed and recorded on a relatively broad line.
- the thus removed waste material is passed through the convex shape of the discharge surface 37 of the cutting element 30 in the ejection region 20.4 of the chisel head 20.
- the space material is detected by the hard material elements 28 and carried along according to the rotation of the cutting roller.
- the deflection surface 24.5 prevents the space material from flowing out of the trough 20.6.
- this is guided by the blade shape of the depression 20.6 from the cutting region 20.3 over the ejection region 20.4 to the deflection region 20.5 and thereby deformed into spherical or roller-like lumps.
- the material thus formed becomes in the trough 20.6 for example to a Transported ejection, from where it is then, for example, by a not shown loading tape system, transported away.
- the surface normal of the central longitudinal plane M is shown in the cutting region 20.3 and in the ejection region 20.4 in the direction of the front side 20.1 of the bit 10.
- the bit head 20 In the region of the central longitudinal plane M, the bit head 20 has its largest diameter.
- the cutting area 20.3 and the ejection area 20.4 transverse to the feed direction V can be made very wide, resulting in a high flow rate for the space material.
- the bit 10 is therefore particularly suitable for the degradation of relatively soft material, such as oil sands.
- the cutting area 20.3 is subjected to the highest mechanical load during the operation of the bit 10. Therefore, in this area, the chisel 10 is protected towards its front side 20.1 by the attachment piece 36 with the discharge surface 37 of the cutting element 30 made of a hard material, in the present case made of hard metal. Due to the bulbous shape of the attachment piece 36, the greatest material thickness of the cutting segment 30 is present in the region of the greatest abrasion, which is then reduced with increasing distance to the cutting edge 30 and thus with decreasing mechanical load. By means of this optimized use of material, the production costs of the cutting element 30, which are significantly influenced by the material costs, can be reduced. By using two adjacent cutting elements 30, the forces transmitted to the cutting elements 30 and thus their risk of breakage can be reduced in relation to a wider, individual cutting element 30.
- the projection of the cutting segment 30 can be guided past the cutting edge 31 past the ground that has remained standing.
- the free surface 33 merges without a large step into the identically aligned connection surface 26. 1, so that here too no contact is made. grip points for passing on space material result.
- the cutting element 30 is connected by its solder connection to the contact surface 35 and the support portion 34 fixed to the support portion 23, wherein the force is applied to the cutting element 30 substantially opposite to the feed direction V and thus as a contact force on the interface between the cutting element 30 and the support portion 23 acts. High tensile forces acting on the interface can thus be avoided, so that the cutting element 30 is securely held on the support section 23.
- connection surface 26.1 and the upper lateral connection surfaces 25.1 adjoining the cutting element 30 on the opposite sides of the bit 10 are provided with the anti-wear coating 29 designed as an armored weld.
- the cutting area 20.3 is completely wear-resistant, except for a minimum distance provided between the wear-protection coating 29 and the cutting element 30.
- the ejection region 20.4 is protected towards the front 20.1 by the hard material elements 28. Since the ejection region 20.4 is subjected to less stress than the cutting region 20.3, the material thickness of the hard material elements 28 is reduced compared to the material thickness of the cutting elements 30.
- the hard material elements 28 are connected to the carrier section 23 by means of a material connection produced by soldering.
- the lower lateral connecting surfaces 25.2 adjoining the hard material elements 28 and the deflecting surface 24.5 are likewise protected against increased abrasion with armored welding as a wear protection coating 29, so that the region behind the hard material elements 28 is not washed out.
- the carrier section 23 in the ejection region 20.4 and in the deflection region 20.5 is set back by the rounding region 26.2 of the leftover spacer material, so that only a comparatively small abrasive load of the chisel head 20 is present here when the chisel 10 slides past the earth.
- no wear protection coating 29 is provided in this area. Since the mutual distance of the opposing upper lateral connecting surfaces 25.1 and the opposing lower lateral connecting surfaces 25.2, starting from the cutting elements 30 and the hard material elements 28, toward the back 20.2 of the chisel head 20 toward reduced, an undercut is formed. The lateral connection surfaces 25.1, 25.2 thus do not form a point of attack for the space material.
- the wear of the lateral connecting surfaces 25.1, 25.2 is reduced, on the other hand, the chisel 10 can be pulled more easily through the soil to be degraded. As a result, the power required to drive the cutting roller is reduced, whereby energy is saved.
- the deflection region 20.5 is least polluted in comparison to the cutting region 20.3 and the ejection region 20.4. Therefore, the wear protection coating 29 applied on the deflection surface 24.5 offers sufficient protection of the deflection region 20.5.
- expensive hard material elements can be dispensed so in the deflection 20.5.
- the wear protection is thus adapted to the different mechanical loading of the cutting area 20.3, the ejection area 20.4 and the deflection area 20.5, resulting in approximately the same service life for all areas. This avoids that the bit 10 prematurely fails due to a design-related premature wear of a range.
- the use of materials, in particular for the cost-intensive hard materials and wear-resistant coatings 29, is optimized.
- the wear protection coating 29 is only brought up to a minimum distance to the cutting elements 30 and the hard material elements 28. This avoids that the cutting elements 30 or the hard material elements 28 are damaged or destroyed by the high temperatures occurring during the coating. Furthermore, a thermally induced deformation of the support areas for the cutting elements 30 and the hard material elements 28 is avoided.
- the substantially cylindrical running support body 27 covers the upper portion of the bit holder 50 and thus protects it from premature wear. This results in a significantly longer service life for the bit holder 50 than for the easily replaceable bit 10 itself.
- the bit holder 55 has over the round shank 42 of the chisel 10 by a predetermined clearance larger diameter, whereby the drill collar 40 can be easily inserted during assembly in the bit holder 55 and expelled during disassembly again.
- the centering section 41 By means of the centering section 41, an exact alignment of the bit 10 and the tool shank 40 with respect to the bit receptacle 55 is achieved in cooperation with the centering pad 52.
- the chisel holder 50 is made thick-walled in the holding area 54 around the chisel holder 55 designed as a central bore, in order to be able to reliably catch the transverse forces transmitted by the chisel shank 40.
- the bevel 53 passes surgeonsch missionsdes space material without protruding edges of the bit holder 50 over, so that in this expansion region of the bit holder 50, the abrasion forces are kept as small as possible.
- the base part 56 of the chisel holder 50 encloses with its front wall 56.5 the cavity 57 formed toward the front side 20.1.
- the outer contour of the front wall 56.5 is adapted to the outer contour of the subsequent holding portion 54, so that the bit holder 50 can be inserted into a corresponding receptacle on the cutting roller and welded there.
- the blocking piece 60 can be pushed onto the blocking pin 44 during assembly and fixed with the clamping elements 70, together with the bit 10.
- a rotation of the bit 10 is prevented about its central longitudinal axis.
- a rotation of the blocking piece 60 about the central longitudinal axis of the bit 10 is blocked by a second positive locking connections between the blocking piece 60 and the base part 56.
- the positive connection between the blocking piece 60 and the locking pin 44 of the bit 10 and between the blocking piece 60 and the base part 56 are designed such that the blocking piece 60 only in a radial alignment in the cavity 57 and the bit 10 only in one direction of rotation in the Breakthrough 64 of the blocking piece 60 can be introduced.
- the shovel-shaped trough 20.6 of the chisel head 10 is thus always aligned with the front side 20.1 and thus to the feed direction V.
- the clamping element 70 is pulled out of the groove 45 and the blocking piece 60 is removed.
- the chisel 10 can now be driven out, optionally with the aid of a sprouting tool, from the side of the opening of the base part 56 opposite the holder region 54.
- FIG. 4 shows a side view of a second bit 11 for removing comparatively harder material.
- the same components are designated the same according to Figures 1 to 3.
- the second chisel 11 shown in FIG. 4 has only one cutting area 20.3 and one ejection area 20.4.
- the support portion 23 is covered in the cutting area 20.3 to the front side 20.1 of the chisel head 20 through a single, substantially L-shaped cutting element 30.
- a cuboid hard material element 28 is attached to the front side 20. 1 of the carrier section 23 in the subsequent ejection region 20.
- two or more juxtaposed hard material elements 28 may be provided.
- the discharge surface 37 is roof-shaped, wherein an edge corresponding to a ridge formed edge of the discharge surface 37 along a running from the front 20.1 to 20.2 back longitudinal center plane of the second bit 11 is aligned.
- the cutting element 30 is mounted obliquely to the central longitudinal axis of the second bit 11 aligned on the support portion 23 that the edge approximately in the feed direction V of the second bit 11 shows.
- the free surface 33 formed by the projection 32 is designed roof-shaped, in which case the surface plane along the feed direction V is aligned.
- An edge of the free surface 33 extending in accordance with a ridge of the roof is likewise arranged along the central longitudinal plane of the second bit 11 running from the front side 20.1 to the rear side 20.2.
- the cutting edge 31 is thereby formed with a lying on the central longitudinal plane cutting tip 38.
- the cutting area 20.3 can also carry two mirror-image constructed cutting elements 30 which abut along the described, running on the central longitudinal plane edges.
- the carrier portion 23 has a flat running surface 26.1, which is aligned in the same direction as the projection 32 of the cutting element 30.
- the connection surface 26.1 is partially provided with a wear protection coating 29.
- the connection surface 26.1 angles into a rear surface of the chisel head 20 which extends equidistant from the central longitudinal axis of the second chisel 11. This back surface goes without any attachment in the cylindrical portion of the support body 27.
- the hard material element 28 is slightly inclined with respect to the central longitudinal plane M to the front 20.1 of the ejection region 20.4.
- the positioning edge 24.3 for positioning the hard material element 28 is formed by a step at the lower end of the ejection region 28, from which the chisel head 20 assumes a cylindrical outer contour toward the front 20.1.
- the hard material element 28 is applied with an end face to the positioning edge 24.3.
- the bit head 20 of the second bit 11 does not form a trough 20.6, as is the case with the bit 10 shown in Figs. 1-3.
- the front surface of the carrier section 23 of the second bit 11 formed by the deflection surface 37 of the cutting element 30 and the hard material element 28 is guided, starting from the cutting edge 31 arranged in the region of the central longitudinal plane M, toward the front side 20. 1 of the bit head 20.
- the support portion 23 of the second bit 11 has a significantly greater material thickness than the support portion 23 of the first bit 10 shown in Figures 1 to 3.
- the support body 27, the drill collar 40, the locking piece 70, the clamping member 70 and the bit holder 50 are with the same functionality for both chisels 10, 11 the same structure.
- the second bit 11 is particularly suitable for the degradation of hard, non plastically deformable or non-sandy material. Furthermore, the second bit 11 may preferably be used in winter in frozen soil, such as frozen oil sand, while the bit 10 shown in Figs. 1-3 is used on thawed soils.
- FIG. 6 shows, in a further perspective rear view, the chisel 10 from FIG. 1. The illustration allows the view through the mounting opening 56. 3 into the cavity 57 of the chisel 10.
- FIG. 6 shows, the blocking piece 60 is pushed onto the drill collar 40, of which only the end piece 46 can be seen, and held by the clamping element 70 inserted into the groove 45 of the tool shank 40.
- the blocking piece 60 has an approximately U-shaped outer contour, with which it rests against the correspondingly shaped front wall 56.5 with its front wall surface 56.1 and its side wall surfaces 56.2. Due to this U-shape and the contact with the side wall surfaces 56. 2, the blocking piece 60 is blocked against rotation about the central longitudinal axis of the bit 10.
- the blocking piece 60 has a base body 61, on which a web 63 is formed.
- the web 63 encloses a terminal receptacle 62 except for an aligned in the direction of the mounting opening 56.3 of the bit holder 60 toward area.
- the clamping element 70 is arranged in the terminal receptacle 62 and clamped to the groove 45.
- the clamping element 70 is designed plate-like with a rectangular basic shape. Starting from a front end side, a clamping region 73, which is encompassed by two clamping jaws 74, is provided, in which the tool shank 40 is clamped with its groove 45. Starting from the clamping region 73, a widening clamping slot 72 is provided in the center of the clamping element 70, which ends on a bracket 71 connecting the clamping jaws 74.
- the clamping element 70 is preferably made of a resilient material, in particular of a spring steel.
- the chisel 10 is inserted with its chisel shaft 40 into the chisel holder 55 of the chisel holder 50. Thereafter, the blocking piece 60 is pushed through the mounting hole 56.3 on the drill collar 40 and fixed with the clamping element 70.
- the clamping element 70 is pressed with its clamping region 73 on the groove 45, wherein the two clamping jaws 74 along the clamping slot 72 are pressed apart to then firmly in the groove 45 to lay around the drill collar 40.
- FIG. 7 shows a section through the bit holder 50 corresponding to a sectional area VII shown in FIGS. 1 and 4.
- front wall 56.5 of the base part 56 is the semicircular front wall surface
- the approximately U-shaped blocking piece 60 is adapted in its outer contour to the profile of the front wall surface 56. 1 and the side wall surfaces 56. 2, so that it faces the front wall surface 56. 1 with a rounding 65. 2 oriented toward the front 20. 1 and with two laterally to the rounding 65 subsequent blocking surfaces 65.1 abuts against the two side wall surfaces 56.2 of the front wall 56.5.
- the opening 64 of the blocking piece 60 is adapted in its contour to the outer contour of the blocking pin 44. For this purpose, the opening 64 to the back
- the opening 64 has a convex breakthrough rounding 64.2 which bears against a pin turn 44.2 of the blocking pin 44.
- the orientation of the blocking piece 60 is fixed. In this case, a rotation of the blocking piece 60 about the central longitudinal axis of the bit 10, 11 is blocked by the voltage applied to the side wall surfaces 56.2 blocking surfaces 65.1. Also, the blocking pin 44 of the drill collar 40 can be introduced due to the Zapfenrundung 44.2 and the corresponding breakthrough rounding 64.2 only in one orientation in the opening 64 of the blocking piece 60. The orientation of the bit 10, 11 and thus of the bit head 20 is determined. A rotation of the bit 10, 11 about its bit longitudinal axis is blocked by the voltage applied to the aperture surfaces 64.1 pin surfaces 44.1.
- FIG. 8 shows a detail of the chisels 10, 11 shown in FIGS. 1 and 4 in the area of the blocking piece 60.
- the blocking piece 60 is formed from the base body 61 which surrounds the blocking pin 44, and a stop surface 61.1 towards the holding region 54 of the chisel holder 50 formed.
- the abutment surface 61.1 is at a small distance from a corresponding mating surface 54.1 of the holding region 54, which is arranged radially around the chisel holder 55.
- a guide web 66 is integrally formed on the base body 61, which follows in its inner contour the blocking pin 44 and in its outer contour of the chisel holder 55 of the chisel holder 50.
- the guide bar 66 is inserted into the end portion of the chisel holder 55, whereby the blocking piece 60 is fixed radially. To avoid tilting during assembly, the guide web 66 circumferentially on a chamfer 66.1.
- the locking pin 44 is inserted into the opening 64 of the locking piece 60, with which the blocking pin forms a positive connection, which prevents rotation of the bit 10, 11.
- the main body 61 Towards the outer circumference, the main body 61 has a circumferential chamfer 61.2, which lies opposite the front wall 56.5 in relation to a projection 56.6 of the base part 56 of the chisel holder 50.
- the web 63 encloses the terminal receptacle 62 except for an aligned in the direction of the mounting opening 56.3 of the bit holder 60 area.
- the clamping member 70 is disposed in the terminal receptacle 62 and clamped to the formed between the locking pin 44 and the end piece 46 groove 45.
- the blocking piece 60 thus blocks a rotational movement of the bit 10, 11 and in cooperation with the clamping element 70 to a small amount of movement of the bit 10, 11 in the axial direction.
- the small clearance results from the small distance between the abutment surface 81.1 and the counter surface 54.1.
- the game facilitates the assembly or disassembly of the bit (10, 11) and compensates for tolerances.
- the stop surface 61.1 axially acting on the chisel 10, 11 tensile forces on the counter surface 54.1 be transferred to the bit holder 50.
- the clamping element 70 allows rapid assembly and disassembly of the chisel 10, 11. Since the clamping member 70 is received in the terminal receiving 62 of the locking piece 60, it is largely protected from damage by penetrating space material.
- the bit holder 50 can accommodate both the chisels 10, 11 locked in their rotation, as well as those round shank bits where rotation is desired.
- the blocking pin 44, the blocking piece 60 and the clamping element 70 in the place of which the known holding elements are provided for blocking a movement of the round shank chisel in the axial direction, are omitted.
- the cutting roller can be equipped with different chisels 10, 11 depending on the field of application.
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
- Earth Drilling (AREA)
- Percussive Tools And Related Accessories (AREA)
- Milling Processes (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201580048022.8A CN106795762A (zh) | 2014-09-09 | 2015-09-08 | 凿刀、尤其是圆杆凿刀 |
CA2956603A CA2956603A1 (en) | 2014-09-09 | 2015-09-08 | Pick, in particular a round-shank pick |
BR112017001911A BR112017001911A2 (pt) | 2014-09-09 | 2015-09-08 | cinzel, especialmente cinzel de haste redonda |
US15/507,372 US20170241265A1 (en) | 2014-09-09 | 2015-09-08 | Pick, In Particular A Round-Shank Pick |
EP15757529.1A EP3191685A1 (de) | 2014-09-09 | 2015-09-08 | MEIßEL, INSBESONDERE RUNDSCHAFTMEIßEL |
RU2017111812A RU2017111812A (ru) | 2014-09-09 | 2015-09-08 | Резец, в частности резец с круглым хвостовиком |
JP2017513486A JP2017526840A (ja) | 2014-09-09 | 2015-09-08 | ビット、特に丸形シャンクビット |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014112964.4A DE102014112964A1 (de) | 2014-09-09 | 2014-09-09 | Meißel, insbesondere Rundschaftmeißel |
DE102014112964.4 | 2014-09-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2016038021A1 true WO2016038021A1 (de) | 2016-03-17 |
Family
ID=54056220
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2015/070474 WO2016038021A1 (de) | 2014-09-09 | 2015-09-08 | MEIßEL, INSBESONDERE RUNDSCHAFTMEIßEL |
Country Status (9)
Country | Link |
---|---|
US (1) | US20170241265A1 (de) |
EP (1) | EP3191685A1 (de) |
JP (1) | JP2017526840A (de) |
CN (1) | CN106795762A (de) |
BR (1) | BR112017001911A2 (de) |
CA (1) | CA2956603A1 (de) |
DE (2) | DE202014010678U1 (de) |
RU (1) | RU2017111812A (de) |
WO (1) | WO2016038021A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202015009200U1 (de) * | 2015-11-06 | 2016-12-23 | Betek Gmbh & Co. Kg | Werkzeugsystem |
DE202017107805U1 (de) * | 2017-09-21 | 2019-01-08 | Betek Gmbh & Co. Kg | Fixationselement |
GB201901712D0 (en) | 2019-02-07 | 2019-03-27 | Element Six Gmbh | Pick tool for road milling |
Citations (5)
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GB2041289A (en) * | 1979-02-01 | 1980-09-10 | Kennametal Inc | Road maintenance bits and blocks |
GB2113177A (en) * | 1982-01-08 | 1983-08-03 | Kennametal Inc | Bit and block assembly |
GB2207691A (en) * | 1987-07-20 | 1989-02-08 | Sandvik Rock Tools Ltd | Cutter picks |
WO2011113113A1 (en) * | 2010-03-18 | 2011-09-22 | Southern Engineering Pty Ltd | Cutting pick, wear and mounting system for mining machine |
US20130328379A1 (en) * | 2012-06-12 | 2013-12-12 | Kennametal Inc. | Wear Resistant Cutting Tool |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
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DE1844008U (de) * | 1959-11-07 | 1961-12-28 | Eickhoff Geb | Schraemmeissel, insbesondere fuer walzenschraemmaschinen. |
JPS50155302U (de) * | 1974-06-13 | 1975-12-23 | ||
GB1548913A (en) * | 1975-01-22 | 1979-07-18 | Secr Defence | Excavating machines |
SU686635A3 (ru) * | 1975-08-30 | 1979-09-15 | Геверкшафт Эйзенхютте Вестфалия (Фирма) | Резец дл угольного струга |
US4316636A (en) * | 1979-02-01 | 1982-02-23 | Kennametal Inc. | Excavation and road maintenance bits and blocks |
JPS60173285A (ja) * | 1984-02-17 | 1985-09-06 | 大成建設株式会社 | 岩盤掘削ビツト |
US4595241A (en) * | 1984-04-16 | 1986-06-17 | Gilbert Jerry F | Digging tooth and holder therefor |
GB8504668D0 (en) * | 1985-02-22 | 1985-03-27 | Hall & Pickles Ltd | Mineral cutter pick |
DE3701905C1 (de) | 1987-01-23 | 1988-09-15 | Betek Bergbau & Hartmetall | Befestigung eines Rundschaftmeissels |
US5007685A (en) * | 1989-01-17 | 1991-04-16 | Kennametal Inc. | Trenching tool assembly with dual indexing capability |
JPH0522683U (ja) * | 1991-08-27 | 1993-03-23 | 東芝タンガロイ株式会社 | カツタービツト |
JP3382730B2 (ja) * | 1994-08-02 | 2003-03-04 | 株式会社小松製作所 | 耐摩耗肉盛層形成方法およびその方法を用いる耐摩耗複合材 |
CN2825948Y (zh) * | 2004-09-28 | 2006-10-11 | 周崇义 | 径向安装式切向截齿 |
US9222353B2 (en) * | 2008-01-08 | 2015-12-29 | Esco Corporation | Tip for an earth working roll |
US8534766B2 (en) * | 2008-04-22 | 2013-09-17 | Kennametal Inc. | Indexable cutting tool system |
US8668275B2 (en) * | 2011-07-06 | 2014-03-11 | David R. Hall | Pick assembly with a contiguous spinal region |
US9593577B2 (en) * | 2012-09-28 | 2017-03-14 | Element Six Gmbh | Pick tool having a super-hard planar strike surface |
-
2014
- 2014-09-09 DE DE202014010678.9U patent/DE202014010678U1/de not_active Expired - Lifetime
- 2014-09-09 DE DE102014112964.4A patent/DE102014112964A1/de not_active Withdrawn
-
2015
- 2015-09-08 BR BR112017001911A patent/BR112017001911A2/pt not_active IP Right Cessation
- 2015-09-08 JP JP2017513486A patent/JP2017526840A/ja active Pending
- 2015-09-08 EP EP15757529.1A patent/EP3191685A1/de not_active Withdrawn
- 2015-09-08 US US15/507,372 patent/US20170241265A1/en not_active Abandoned
- 2015-09-08 CA CA2956603A patent/CA2956603A1/en not_active Abandoned
- 2015-09-08 WO PCT/EP2015/070474 patent/WO2016038021A1/de active Application Filing
- 2015-09-08 RU RU2017111812A patent/RU2017111812A/ru unknown
- 2015-09-08 CN CN201580048022.8A patent/CN106795762A/zh active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2041289A (en) * | 1979-02-01 | 1980-09-10 | Kennametal Inc | Road maintenance bits and blocks |
GB2113177A (en) * | 1982-01-08 | 1983-08-03 | Kennametal Inc | Bit and block assembly |
GB2207691A (en) * | 1987-07-20 | 1989-02-08 | Sandvik Rock Tools Ltd | Cutter picks |
WO2011113113A1 (en) * | 2010-03-18 | 2011-09-22 | Southern Engineering Pty Ltd | Cutting pick, wear and mounting system for mining machine |
US20130328379A1 (en) * | 2012-06-12 | 2013-12-12 | Kennametal Inc. | Wear Resistant Cutting Tool |
Also Published As
Publication number | Publication date |
---|---|
JP2017526840A (ja) | 2017-09-14 |
DE102014112964A1 (de) | 2016-03-10 |
BR112017001911A2 (pt) | 2017-11-28 |
RU2017111812A3 (de) | 2018-10-11 |
CA2956603A1 (en) | 2016-03-17 |
CN106795762A (zh) | 2017-05-31 |
EP3191685A1 (de) | 2017-07-19 |
RU2017111812A (ru) | 2018-10-11 |
DE202014010678U1 (de) | 2016-04-13 |
US20170241265A1 (en) | 2017-08-24 |
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