CN112453504A - Twist drill with hole-dividing alloy tool bit - Google Patents
Twist drill with hole-dividing alloy tool bit Download PDFInfo
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- CN112453504A CN112453504A CN202010428191.7A CN202010428191A CN112453504A CN 112453504 A CN112453504 A CN 112453504A CN 202010428191 A CN202010428191 A CN 202010428191A CN 112453504 A CN112453504 A CN 112453504A
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- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 264
- 239000000956 alloy Substances 0.000 title claims abstract description 264
- 238000005520 cutting process Methods 0.000 claims abstract description 439
- 238000000034 method Methods 0.000 claims description 18
- 238000005728 strengthening Methods 0.000 claims description 14
- 230000001154 acute effect Effects 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 abstract description 41
- 238000003754 machining Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 2
- 239000007787 solid Substances 0.000 description 12
- 238000002474 experimental method Methods 0.000 description 9
- 229910000997 High-speed steel Inorganic materials 0.000 description 4
- 229910017052 cobalt Inorganic materials 0.000 description 4
- 239000010941 cobalt Substances 0.000 description 4
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 4
- 238000005242 forging Methods 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 4
- 238000005496 tempering Methods 0.000 description 4
- 238000007514 turning Methods 0.000 description 4
- 238000010923 batch production Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 238000007669 thermal treatment Methods 0.000 description 3
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/02—Twist drills
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/06—Drills with lubricating or cooling equipment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/04—Angles, e.g. cutting angles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/08—Side or plan views of cutting edges
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Abstract
本发明提供一种分孔合金刀头麻花钻，主要涉及用于机械加工的钻孔刀具，该种刀具稳定性强，散热效率高，寿命长，且在钻削加工时容易定位，包括刀具柄和螺旋刀体1，在材质相同的情况下，在分孔合金头麻花钻的合金刀头上进行具有毫米强度的切削面和立起的台阶，凸起的切削刃的应用。
The invention provides a split-hole alloy cutter head twist drill, which mainly relates to a drilling cutter for machining. As with the helical cutter body 1, under the condition of the same material, the alloy cutter head of the split-hole alloy head twist drill is applied with a millimeter-strength cutting surface, a raised step, and a raised cutting edge.
Description
The technical field is as follows:
the invention relates to a twist drill with a hole-dividing alloy cutter head, which is used for the drilling and milling process of mechanical machining and the maintenance of a bench worker.
Background art:
at present, a drilling tool used in machining comprises a chisel edge, a cutting edge, a spiral cutting edge and a side edge, wherein the cutting edge is arranged on a spiral cutting surface and is of a single same-position cutting structure, the cutting edge is in a centrifugal force transmission range of rotary cutting, the cutting edge is simultaneously subjected to rotary cutting force and transmission force of which the center is outward, the cutting edge at the intersection of the cutting edge and the spiral cutting edge is always extremely easy to damage under the action of double forces, the existing drilling tool generates a swinging phenomenon due to the fact that the structure is not absolutely balanced during drilling, the spiral cutting surface and the spiral cutting edge are damaged due to the fact that the tool is stabilized by the spiral cutting surface, the general understanding is that the smoother and higher the strength of the surface is obtained, the new theory is that the strength of the surface with micro gaps is higher, and the essential structural characteristics of substances are not disclosed, so that the existing drilling tool is low in efficiency, and the drilling precision is poor.
The invention content is as follows:
the present invention has been made in view of the above problems, and it is an object of the present invention to provide a twist drill with a hole-splitting alloy bit, which has a function of blocking a conductive force, a high heat dissipation efficiency, a high strength, a long life, and easy positioning during drilling, and a high drilling accuracy, and it is widely known that the smoother surface is, the higher strength is, the more recent new theory is, the higher strength is, the surface area of a micro-gap is, and no intrinsic structural characteristics of a material is disclosed, in the case that two solid bodies have the same volume, the surface area of a dispersed small-volume solid is larger than that of an integral solid body, even diamond is broken when the integral structure of a solid body reaches a certain volume limit, the sum of the stress strength of the small-volume solid bodies is much larger than that of the integral solid body according to the volume stress, and experiments prove that the twist drill is, the millimeter-scale twist drill has the most obvious high-strength characteristic, namely millimeter strength, and is applied to the twist drill with the hole-dividing alloy tool bit.
In order to achieve the purpose, the invention adopts the following technical scheme:
a hole-dividing twist drill with alloy cutter bits comprises a cutter handle, spiral cutter bodies and alloy cutter bits, wherein the hole-dividing twist drill with alloy cutter bits is integrally provided with at least two spiral cutter bodies, the surface of each spiral cutter body facing to the cutting direction is formed into a spiral cutting surface, the surface of the outer side of the spiral cutting surface facing backwards in the rotating direction is a spiral auxiliary cutting surface, the spiral cutting surface and the spiral auxiliary cutting surface are intersected to form a spiral cutting edge, the surface of the back side of the axial front end of the spiral cutting surface is formed into a back cutting surface, the back cutting surfaces on at least two sides are intersected to form a cross blade or a sharp blade, the spiral cutting surface and the back cutting surface are intersected to form a cutting edge, and the spiral auxiliary cutting surface and the back cutting surface are intersected to form a side blade,
the method is characterized in that: the hole-dividing alloy cutter head twist drill integrally comprises a cutter handle and spiral cutter bodies, the front end spiral cutting surfaces of the two spiral cutter bodies which are integrally or connected and formed into an integral body are milled with grooves and integrally or connected and formed with an alloy cutter head, the alloy cutter head is integrally formed with two cutting surfaces facing the front end of the rotating direction along the axial center of the twist drill, the spiral cutting surfaces on the two sides of the two spiral cutter bodies which are integrally formed with the alloy cutter head are respectively arranged with the grooves, the spiral cutting edges extend to the alloy cutter head to form auxiliary cutting edges, and the spiral auxiliary cutting surfaces extend to the alloy cutter head to form auxiliary cutting surfaces;
the spiral drill with the hole-dividing alloy tool bit is provided with millimeter-strength micro-tangent planes which are recessed from the cutting surface of the alloy tool bit in the axial center direction along the spiral cutting edge on the outer periphery of the alloy tool bit; the inner side of the micro-section of the alloy cutter head is convexly provided with a millimeter-strength micro-reinforced stress extension table; the millimeter-strength micro-cutting surface of the alloy cutter head is intersected with the auxiliary cutting surface of the outer periphery to form a millimeter-strength micro-cutting edge; the millimeter-strength micro-cutting surface of the alloy cutter head is intersected with the rear cutting surface to form a millimeter-strength cutting micro-blade; the millimeter-strength micro-strengthening stress extending table of the alloy cutter head is intersected with the rear cutting surface to form a millimeter-strength side micro blade;
and the alloy tool bit of the hole-dividing alloy tool bit twist drill is provided with a millimeter-strength hole-dividing platform in a stepped concave manner from the axial center to the cutting surface of the auxiliary cutting edge on the outer periphery; the millimeter-strength hole dividing table of the alloy cutter head is intersected with the rear cutting surface to form a millimeter-strength side micro blade; the top of the alloy cutter head with the millimeter-strength hole-dividing table is intersected with the cutting surface of the inner side bulge to form a millimeter-strength cutting edge; the cutting surface of the alloy cutter head, which is provided with the millimeter-strength hole dividing table and is convex at the inner side, is a dividing cutting surface, and the dividing cutting surface of the alloy cutter head is intersected with the rear cutting surface to form a cutting edge; the width of the slitting section of the alloy cutter head is more than or equal to one third of the radius of the twist drill of the slitting alloy cutter head, and is less than or equal to two thirds of the radius of the twist drill of the slitting alloy cutter head.
A hole-dividing twist drill with alloy cutter bits comprises a cutter handle, spiral cutter bodies and alloy cutter bits, wherein the hole-dividing twist drill with alloy cutter bits is integrally provided with at least two spiral cutter bodies, the surface of each spiral cutter body facing to the cutting direction is formed into a spiral cutting surface, the surface of the outer side of the spiral cutting surface facing backwards in the rotating direction is a spiral auxiliary cutting surface, the spiral cutting surface and the spiral auxiliary cutting surface are intersected to form a spiral cutting edge, the surface of the back side of the axial front end of the spiral cutting surface is formed into a back cutting surface, the back cutting surfaces on at least two sides are intersected to form a cross blade or a sharp blade, the spiral cutting surface and the back cutting surface are intersected to form a cutting edge, and the spiral auxiliary cutting surface and the back cutting surface are intersected to form a side blade,
the method is characterized in that: the hole-dividing alloy cutter head twist drill integrally comprises a cutter handle and spiral cutter bodies, the front end spiral cutting surfaces of the two spiral cutter bodies which are integrally or connected and formed into an integral body are milled with grooves and integrally or connected and formed with an alloy cutter head, the alloy cutter head is integrally formed with two cutting surfaces facing the front end of the rotating direction along the axial center of the twist drill, the spiral cutting surfaces on the two sides of the two spiral cutter bodies which are integrally formed with the alloy cutter head are respectively arranged with the grooves, the spiral cutting edges extend to the alloy cutter head to form auxiliary cutting edges, and the spiral auxiliary cutting surfaces extend to the alloy cutter head to form auxiliary cutting surfaces;
the spiral drill with the hole-dividing alloy tool bit is provided with millimeter-strength micro-tangent planes which are recessed from the cutting surface of the alloy tool bit in the axial center direction along the spiral cutting edge on the outer periphery of the alloy tool bit; a micro-strengthening stress extension table with millimeter strength is formed on the inner side of the micro-section of the alloy tool bit of the hole-dividing alloy tool bit twist drill in a protruding mode; the millimeter-strength micro-cutting surface is intersected with the auxiliary cutting surface of the outer periphery to form a millimeter-strength micro-cutting edge; the millimeter-strength micro-cutting surface is intersected with the rear cutting surface to form a millimeter-strength cutting micro-blade; the millimeter-strength micro-stress-strengthening extension table is intersected with the rear cutting surface to form a millimeter-strength side micro blade;
and the alloy tool bit of the hole-dividing alloy tool bit twist drill is provided with a millimeter-strength hole-dividing platform in a stepped concave manner from the axial center to the cutting surface of the auxiliary cutting edge on the outer periphery; the millimeter-strength hole dividing table is intersected with the rear cutting surface to form a millimeter-strength side micro blade; the top of the alloy cutter head with the millimeter-strength hole-dividing table is intersected with the cutting surface of the inner side bulge to form a millimeter-strength cutting edge; the cutting surface of the alloy cutter head, which is provided with the millimeter-strength hole dividing table and is convex at the inner side, is a dividing cutting surface, and the dividing cutting surface of the alloy cutter head is intersected with the rear cutting surface to form a cutting edge; the width of the slitting surface of the alloy cutter head is more than or equal to one third of the radius of the twist drill of the slitting alloy cutter head and less than or equal to two thirds of the radius of the twist drill of the slitting alloy cutter head;
at least one notch edge is arranged on the alloy tool bit cutting edge of the hole-dividing alloy tool bit twist drill; the notch edge extends towards the rear cutting surface to form at least one groove.
A hole-dividing twist drill with alloy cutter bits comprises a cutter handle, spiral cutter bodies and alloy cutter bits, wherein the hole-dividing twist drill with alloy cutter bits is integrally provided with at least two spiral cutter bodies, the surface of each spiral cutter body facing to the cutting direction is formed into a spiral cutting surface, the surface of the outer side of the spiral cutting surface facing backwards in the rotating direction is a spiral auxiliary cutting surface, the spiral cutting surface and the spiral auxiliary cutting surface are intersected to form a spiral cutting edge, the surface of the back side of the axial front end of the spiral cutting surface is formed into a back cutting surface, the back cutting surfaces on at least two sides are intersected to form a cross blade or a sharp blade, the spiral cutting surface and the back cutting surface are intersected to form a cutting edge, and the spiral auxiliary cutting surface and the back cutting surface are intersected to form a side blade,
the method is characterized in that: the hole-dividing alloy cutter head twist drill integrally comprises a cutter handle and spiral cutter bodies, the front end spiral cutting surfaces of the two spiral cutter bodies which are integrally or connected and formed into an integral body are milled with grooves and integrally or connected and formed with an alloy cutter head, the alloy cutter head is integrally formed with two cutting surfaces facing the front end of the rotating direction along the axial center of the twist drill, the spiral cutting surfaces on the two sides of the two spiral cutter bodies which are integrally formed with the alloy cutter head are respectively arranged with the grooves, the spiral cutting edges extend to the alloy cutter head to form auxiliary cutting edges, and the spiral auxiliary cutting surfaces extend to the alloy cutter head to form auxiliary cutting surfaces;
the spiral drill with the hole-dividing alloy tool bit is provided with millimeter-strength micro-tangent planes which are recessed from the cutting surface of the alloy tool bit in the axial center direction along the spiral cutting edge on the outer periphery of the alloy tool bit; a micro-strengthening stress extension table with millimeter strength is formed on the inner side of the micro-section of the alloy tool bit of the hole-dividing alloy tool bit twist drill in a protruding mode; the millimeter-strength micro-cutting surface of the alloy cutter head is intersected with the auxiliary cutting surface of the outer periphery to form a millimeter-strength micro-cutting edge; the millimeter-strength micro-cutting surface of the alloy cutter head is intersected with the rear cutting surface to form a millimeter-strength cutting micro-blade; the millimeter-strength micro-strengthening stress extending table of the alloy cutter head is intersected with the rear cutting surface to form a millimeter-strength side micro blade;
and the alloy tool bit of the hole-dividing alloy tool bit twist drill is provided with a millimeter-strength hole-dividing platform in a stepped concave manner from the axial center to the cutting surface of the auxiliary cutting edge on the outer periphery; the millimeter-strength hole dividing table is intersected with the rear cutting surface to form a millimeter-strength side micro blade; the top of the millimeter-strength hole-dividing table is intersected with the cutting surface of the inner side bulge to form a millimeter-strength cutting edge; the cutting surface with the millimeter-strength hole dividing table protruding from the inner side is a dividing surface, the dividing surface is intersected with the rear cutting surface to form a cutting edge, and the width of the dividing surface is more than or equal to one third of the radius of the twist drill with the hole dividing alloy tool bit and less than or equal to two thirds of the radius of the twist drill with the hole dividing alloy tool bit;
and at least one or more stages of standing steps are arranged on the alloy bit of the hole-dividing alloy bit twist drill in a mode that the height of the rear cutting surface in the direction of the side edge on the outer side is reduced from the axial center O, the standing steps are intersected with the cutting surface at the front end in the rotating direction to form standing step edges, and the rear cutting surface of the bulge is intersected with the cutting surface to form at least one or more stages of cutting edges with step-shaped bulges.
Preferably, the cutter handle of the twist drill with the hole-dividing alloy cutter head is a straight handle; or the cutter handle of the twist drill with the hole-dividing alloy cutter head is a taper handle.
Preferably, the included angle formed by the cutting edge at the outermost side of the alloy cutter head of the hole-dividing alloy cutter head twist drill and the spiral auxiliary cutting edge is an acute angle or a right angle; or an obtuse angle.
Preferably, a chamfer surface and a chisel edge are formed on the rear cutting surfaces on the two sides of the front end of the alloy cutter head of the hole-dividing alloy cutter head twist drill in an intersecting manner at the axial center; or the rear cutting surfaces on the two sides of the front end of the alloy cutter head of the hole-dividing alloy cutter head twist drill are intersected at the axial center to form a chamfer surface and a sharp edge without a chisel edge.
Preferably, the tool shank and the spiral tool body of the twist drill with the hole-dividing alloy tool bit are integrally provided with cooling holes.
Preferably, a plurality of notch edges are arranged on the cutting edge of the alloy cutter head of the hole-dividing alloy cutter head twist drill;
the notch blade extends towards the rear cutting surface to form a plurality of grooves.
Preferably, a plurality of steps rising up and a plurality of stages of convex rear cutting surfaces are provided on the rear cutting surface where the alloy bit of the hole-dividing alloy bit twist drill is located, starting from the axial center, in such a manner that the height of the rear cutting surface in the outer side edge direction decreases, the plurality of steps rising up and the cutting surface at the front end in the rotation direction intersect to form a plurality of stages of step edges rising up, and the plurality of stages of convex rear cutting surfaces and the cutting surface at the front end in the rotation direction intersect to form a plurality of stages of convex cutting edges.
Preferably, at least one or more steps and at least one or more raised rear cutting surfaces are arranged on the rear cutting surface where the alloy bit of the hole-dividing alloy bit twist drill is located, starting from the axial center, in a manner that the height of the rear cutting surface in the direction of the outer side edge is reduced, the at least one or more steps and the cutting surface at the front end in the rotating direction intersect to form at least one or more steps and raised edges, and the at least one or more raised rear cutting surfaces and the cutting surface intersect to form at least one or more raised cutting edges; and at least one or more notch edges are arranged on the stepped cutting edge of the alloy cutter head with at least one or more steps, and each notch edge extends towards the rear cutting surface to form a groove.
Has the advantages that:
in the contrast experiment that goes on the drilling machine, use the fluted drill of diameter 10.15 to be the experiment, be M35's cobalt high speed steel together, thermal treatment simultaneously, with batch production, the drilling object is the gear finish turning processing price of forging quenching and tempering, drilling depth 35mm, the blind hole, under the fluted drill rotational speed and the amount of feed of ordinary structure reached the limit, the alloy tool bit fluted drill of branch hole can also improve rotational speed 25%, improve the amount of feed 25%, comprehensive drilling efficiency improves more than the one time, the alloy tool bit fluted drill of branch hole of drilling quantity increases more than the triple than the fluted drill of ordinary structure.
Description of the drawings:
the technical solutions and advantages of the present invention will be described in detail by referring to the accompanying drawings, in which:
fig. 1 is a schematic view of a structure of a spiral cutting surface of a hole-dividing alloy bit twist drill according to a first embodiment of the present invention, which is provided with a micro-cut surface and a micro-stress-relief platform.
Fig. 2 is a schematic view of a structural part for providing a cutting surface and a hole-dividing table on a spiral cutting surface of a twist drill with a hole-dividing alloy bit according to a first embodiment of the invention.
Fig. 3 is a schematic view of a micro-section and a micro-stress-enhancement extension stage on a spiral cutting surface of a twist drill with a hole-dividing alloy bit according to a first embodiment of the invention, and a combined structure of the micro-section and the hole-dividing stage on the spiral cutting surface.
Fig. 4 is a schematic view of a partial combination structure in which a recess edge is provided on a cutting edge of the hole-dividing alloy-bit twist drill of the first embodiment and a groove is formed by extending the recess edge toward a rear cutting surface, or the hole-dividing alloy-bit twist drill of the second embodiment is a partial combination structure in which a step is formed by providing a rising step on the rear cutting surface of the hole-dividing alloy-bit twist drill of the first embodiment and intersecting a spiral cutting surface.
The specific implementation mode is as follows:
preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, and in embodiments 1 to 3, a tool having two helical blades will be mainly described as an example.
Embodiment 1:
as shown in fig. 1-2 in combination, a hole-dividing alloy-head twist drill 1 and a drilling tool for machining are mainly related, the hole-dividing alloy-head twist drill integrally comprises a tool shank (not shown) including a taper shank or a straight shank and spiral cutters 4, at least two spiral cutters 4 are provided with grooves milled on the front spiral cutting surfaces and integrally or connected to each other and integrally formed with an alloy cutter head 31, the alloy cutter head 31 is integrally formed with a cutting surface 13 facing the front end in the rotation direction along the axial center of the hole-dividing alloy-head twist drill 1, and the spiral cutting surfaces 13 on both sides of the integrally provided two spiral cutters 4 are respectively provided with the grooves of the two cutting surfaces 13 integrally provided with the alloy cutter head 31;
the hole-dividing alloy bit twist drill 1 is integrally provided with two spiral cutter bodies 4, the surface of the alloy bit 31 of each spiral cutter body 4 facing the cutting direction is provided with a cutting surface 13, the surface of the outer side of the cutting surface 13 facing backwards in the rotating direction is provided with a secondary cutting surface 8, the cutting surface 13 and the secondary cutting surface 8 are intersected to form a spiral cutting edge, the surface of the axial front end back side of the cutting surface 13 is provided with a rear cutting surface 5, rear cutting surfaces on at least two sides are intersected to form a chisel edge, two end chamfers of the chisel edge are provided with a chamfer surface 22 and a chamfer edge 2, the cutting surface 13 and the rear cutting surface 5 are intersected to form a cutting edge 6, the secondary cutting surface 8 and the rear cutting surface 5 are intersected to form a side edge 7, the spiral cutting edge extends to the alloy bit 31 to form the secondary cutting edge, the spiral secondary cutting surface 8 extends to the alloy bit 31 to form the secondary cutting surface 8 of the alloy bit 31, or protrudes out of the secondary cutting surface 8 and protrudes from the spiral cutting;
the micro-tangent plane 18 with millimeter strength is concavely arranged on the cutting surface 13 of the alloy cutter head 31 in the axial center direction from the spiral cutting edge 17 on the outer periphery of the alloy cutter head 31 on the twist drill 1 with the hole-dividing alloy cutter head; the inner side of the micro-section 18 of the alloy tool bit 31 of the hole-dividing alloy tool bit twist drill 1 is convexly provided with a micro-strengthening stress extension table 20 with millimeter strength; the millimeter-strength micro-cutting surface 18 and the secondary cutting surface 8 of the outer periphery are intersected to form a millimeter-strength micro-cutting edge 17; the millimeter-strength micro-cutting surface 18 and the rear cutting surface 5 are intersected to form a millimeter-strength cutting micro-blade 16; the millimeter-strength micro-stress-strengthening extension table 20 is intersected with the rear cutting surface 5 to form a millimeter-strength side micro blade 19;
on a cutting surface 13 of the twist drill 1 with the hole-dividing alloy cutter head, a hole-dividing table 23 with millimeter strength and a slitting surface 24 with millimeter strength are formed on a spiral line which extends from the vicinity of the axial center to the vicinity of the radius center of the auxiliary cutting surface 8 and from the center of the radius or the vicinity thereof along a spiral cutting edge in parallel, the cutting surface 13 is vertically connected with the hole-dividing table 23 with millimeter strength, an included angle of more than or equal to 90 degrees is formed between the hole-dividing table 23 with millimeter strength and the adjacent slitting surface 24, the hole-dividing table 23 with millimeter strength and the cutting surface 13 adjacent to the inner side bulge are intersected to form an included angle of more than or equal to 90 degrees, the slitting surface 24 and the hole-dividing table 23 with millimeter strength are intersected to form a slitting edge 26, and the slitting surface 24 and the hole-dividing table 23 with millimeter strength and the rear cutting surface 5 are intersected to form a cutting edge 6 and a;
the cutting surface 13 with the millimeter-strength hole dividing table 23 and the convex inner side of the upper portion is a hole dividing surface 24, the width of the hole dividing surface 24 is larger than or equal to one third of the radius of the hole dividing alloy cutter head twist drill 1, and is smaller than or equal to two thirds of the radius of the hole dividing alloy cutter head twist drill 1.
According to the method, under the condition that the volumes of two solids are the same, the surface area of the dispersed small-volume solid is larger than that of the whole solid, even diamond can be cracked when the whole structure of the solid reaches a certain volume limit, the sum of the stress strengths of the small-volume solid is far larger than that of the whole solid under the condition of volume stress, and under the conventional physical state, the millimeter-scale strength is the most obvious high strength, namely the millimeter strength, the method is applied to the twist drill 1 with the alloy cutter head and the cutting edge strength of the twist drill 1 with the alloy cutter head is improved by at least one time on the millimeter-scale;
on the part of the cutting surface 13 of the hole-dividing alloy head twist drill 1 close to the auxiliary cutting surface 8, an included angle which is larger than or equal to 90 degrees is formed between a micro-reinforcing stress extension platform 20 which is provided with micro-reinforcing technology and has millimeter strength and an adjacent micro-tangent surface 18 with millimeter strength in a concave mode.
The arrangement is equivalent to drilling a process hole in the drilling process and then drilling, the arrangement is characterized in that the millimeter-strength micro-reinforced stress extending platform 20 is arranged to enhance the strength of the millimeter-strength micro-section 18, the millimeter-strength micro-section 18 has the characteristic of small composite strength due to small area, and the characteristic is that the average strength of one side surface of the millimeter-strength micro-section is larger than the centimeter level according to the volume calculation, the centimeter level is larger than the decimeter level, 1 cubic centimeter is 1 kilocubic millimeter, the area is the surface area of 1 cubic centimeter which is 6 hundred square millimeters, the surface area of 1 thousand cubic millimeters is 6 thousand square millimeters, the force applied according to the volume is one tenth of the surface area of 1 thousand cubic millimeters in 1 cubic centimeter, so the millimeter-level bearing pressure limit is far larger than the centimeter level, and the spiral has the force extended by the millimeter-strength micro-reinforced stress extending platform 20, the micro-section support and reinforcement effect has the strength of the millimeter-strength micro-section 18, so that the micro-section support and reinforcement effect has very high strength and stability when being arranged on the same cutter, and has the advantages of durability and strength cutting edge stability compared with a common reamer, so that the micro-section support and reinforcement effect has the advantage of high efficiency, and the drilling precision is higher.
The chisel edge O is formed by intersecting the rear cutting surfaces at two sides of the hole-dividing alloy bit twist drill 1, or the chamfer surfaces 22 are formed by chamfering at two ends of the chisel edge O, the original chisel edge O of the chamfer edge 2 is formed into a reduced chisel edge O or a sharp edge O without the chisel edge O after being chamfered, and the huge resistance generated by overlong the chisel edge is greatly reduced due to the reduction or elimination of the chisel edge.
According to the above structure, since the drilling cutting is a circular motion, a centrifugal force is generated in the circular motion process, the cutting edge 6 forms a transmission carrier of the centrifugal force, the cutting edge 6 is separated by the cutting face 13 and the adjacent spiral micro-strengthening stress extension stage 16, the micro-cutting edge 17 and the side micro-cutting edge 19 formed by the intersection of the millimeter-strength micro-cutting face 18 and the rear cutting face, the cutting edge 6 is separated by the side micro-cutting edge 19 and the micro-strengthening stress extension stage 20, the cutting force is differentiated, the overall cutting force is reduced, the stress action of the micro-cutting edge 17 and the inner cutting edge 6 of the outer side cutting face, namely the micro-cutting face 18 and the rear cutting face, is reduced to the maximum extent, the temperature of the alloy cutter head 3131 is reduced, the stress of the outer end cutting edge which is most vulnerable to the cutter is decomposed, the service life of the cutter is prolonged, and the high strength.
In the comparative experiment carried out on the drilling machine, the twist drill with the diameter of 10.5 is used as an experiment, the same is M35 cobalt-containing high-speed steel, the heat treatment is carried out simultaneously, the production is carried out in the same batch, the drilling object is the gear finish turning processing price of forging tempering, the drilling depth is 35mm, the blind hole is formed, the micro section 18 width of the twist drill 1 with the hole-dividing alloy cutter head is 1.5mm, the micro-reinforcing stress extension table is 20 mm high by 0.6mm, under the condition that the rotating speed and the feed amount of the twist drill with the common structure reach the limit, the rotating speed of the twist drill 1 with the hole-dividing alloy cutter head can be increased by 25 percent, the feed amount is increased by 25 percent, the comprehensive drilling efficiency is increased by 0.56 times, 526 alloy twist drill holes with the common structure are formed in the twist drill with the hole-dividing alloy cutter head, 4316 drill holes are formed in the hole-dividing.
According to the experimental result, the service efficiency and the service life of the twist drill are obviously greatly improved, and the structure is proved to be an effective mode for prolonging the service life and improving the efficiency.
Embodiment 2:
as shown in fig. 4 in combination, a hole-dividing alloy bit twist drill 1 according to a second embodiment of the present invention mainly relates to a drilling tool for machining, and fig. 4 is a hole-dividing alloy bit twist drill 1 according to the present invention based on the first embodiment, which is additionally provided with at least one notch edge 29 on the cutting edge 6 of the alloy bit 31; the recess edge 29 extends towards the rear cutting face to form at least one recess 30.
Since the notch edge 29 is provided on the cutting edge 6, a chip breaking edge is formed, and the cutting efficiency is greatly improved.
In the contrast experiment that goes on the drilling machine, use the fluted drill of diameter 10.5 to be the experiment, be the cobalt-containing high-speed steel of M35 together, thermal treatment simultaneously, with batch production, the drilling object is the gear finish turning processing price of forging quenching and tempering, drilling depth 35mm, the blind hole, minute tangent plane 18 width 1.5mm of minute hole alloy tool bit fluted drill 1, the 20 height 0.6mm of little intensive stress extension platform, under the condition that fluted drill rotational speed and the amount of feed of ordinary structure reached the limit, minute hole alloy tool bit fluted drill 1 can also improve rotational speed 25%, improve the amount of feed 25%, comprehensive drilling efficiency improves 0.56 times, alloy fluted drill drilling 526 of ordinary structure, minute hole alloy tool bit fluted drill 1 drilling 12316, the drilling quantity minute hole alloy tool bit fluted drill 1 increases twenty four times more than ordinary structure fluted drill.
According to the experimental result, the service efficiency and the service life of the twist drill are obviously greatly improved, and the structure is proved to be an effective mode for prolonging the service life and improving the efficiency.
Embodiment 3:
as shown in fig. 1-4 in combination, a hole-dividing alloy bit twist drill 1 according to a second embodiment of the present invention mainly relates to a drilling tool for machining, and in the first to second embodiments, at least one step 27 and at least one raised rear cutting surface 5 are provided on a rear cutting surface 5 on which an alloy bit of the hole-dividing alloy bit twist drill according to the present invention is located so as to be lowered in height from an axial center toward the rear cutting surface 5 in the direction of an outer side edge 7, the at least one step 27 and the cutting surface 13 at the front end in the rotational direction intersect to form at least one step edge 28, and the at least one raised rear cutting surface 5 and the cutting surface 13 at the front end in the rotational direction intersect to form at least one raised cutting edge 6.
Since the step 27 is provided on the cutting edge 6, the step edge 28 is formed, and the stability is greatly improved and the cutting efficiency is also improved.
In the contrast experiment that goes on the drilling machine, use the fluted drill of diameter 10.5 to be the experiment, be the cobalt-containing high-speed steel of M35 together, thermal treatment simultaneously, with batch production, the drilling object is the gear finish turning processing price of forging quenching and tempering, drilling depth 35mm, the blind hole, minute tangent plane 18 width 1.5mm of minute hole alloy tool bit fluted drill 1, the 20 height 0.6mm of little intensive stress extension platform, under the condition that fluted drill rotational speed and the amount of feed of ordinary structure reached the limit, minute hole alloy tool bit fluted drill 1 can also improve rotational speed 25%, improve the amount of feed 25%, comprehensive drilling efficiency improves 0.56 times, alloy fluted drill drilling 526 of ordinary structure, minute hole alloy tool bit fluted drill 1 drilling 12316, the drilling quantity minute hole alloy tool bit fluted drill 1 increases twenty four times more than ordinary structure fluted drill.
As shown in fig. 4, the hole-dividing alloy bit twist drill 1 according to the present invention is a combination of the first to third embodiments, and a plurality of notch edges 29 may be provided on the alloy bit cutting edge 6 of the hole-dividing alloy bit twist drill, and each notch edge 29 extends toward the rear cutting surface to form a groove 30.
Or a plurality of steps 27 and a plurality of convex rear cutting surfaces 5 are arranged on the rear cutting surface 5 where the alloy bit of the hole-dividing alloy bit twist drill is positioned, in a manner that the height of the rear cutting surface 5 in the direction of the outer side edge 7 is reduced from the axial center, the steps 27 and the cutting surface 13 at the front end in the rotating direction are intersected to form a plurality of steps 28, and the convex rear cutting surfaces 5 and the cutting surface 13 at the front end in the rotating direction are intersected to form a plurality of convex cutting edges 6;
or at least one or more steps 27 and at least one or more raised rear cutting surfaces 5 are arranged on the rear cutting surface 5 where the alloy bit of the hole-dividing alloy bit twist drill is positioned in a manner that the height of the rear cutting surface 5 in the direction of the outer side edge 7 is reduced from the axial center, the at least one or more steps 27 and the cutting surface 13 at the front end in the rotating direction are intersected to form at least one or more steps 28, and the at least one or more raised rear cutting surfaces 5 and the cutting surface 13 are intersected to form at least one or more raised cutting edges 6; and at least one or more stepped cutting edges 6 are provided with at least one or more notch edges 29, each notch edge extending towards the rear cutting face to form a groove 30.
The cutting efficiency and the service life of the twist drill 1 with the alloy bit of the hole-dividing bit can be furthest exerted by the combination that the notch edge 29 which breaks chips and decomposes the cutting force is arranged on the cutting edge 6 of the alloy bit 31 of the twist drill 1 with the alloy bit of the hole-dividing bit and extends to the rear cutting surface to form the groove 30.
The stepped convex step 27 is arranged on the rear cutting surface 5 of the alloy tool bit 31 of the hole-dividing alloy tool bit twist drill 1, so that the stability of the hole-dividing alloy tool bit twist drill 1 in drilling is effectively improved, the cutting resistance is effectively decomposed, and the cutting efficiency and the service life of the hole-dividing alloy tool bit twist drill 1 are improved.
On the basis of the first to third embodiments, the included angle formed by the cutting edge 6 of the outermost alloy cutter head 31 of the hole-dividing alloy cutter head twist drill 1 and the spiral auxiliary cutting edge 14 in a comprehensive and selective manner is an acute angle; or the included angle formed by the cutting edge 6 of the alloy cutter head 31 at the outermost side of the twist drill with the hole-dividing alloy cutter head and the spiral auxiliary cutting edge 14 is a right angle; or the included angle of the cutting edge 6 of the outermost alloy cutter head 31 of the twist drill with the hole-dividing alloy cutter head and the spiral auxiliary cutting edge 14 is an obtuse angle.
The rear cutting surfaces 5 on two sides of the front end of the alloy cutter head 31 of the hole-dividing alloy cutter head twist drill 1 are intersected at the axial center to form a chamfer surface 22, a chamfer edge 24 and a chisel edge 3; or the back cutting surfaces on the two sides of the front end of the alloy cutter head of the hole-dividing alloy cutter head twist drill are intersected at the axial center to form a chamfer surface 22, a chamfer surface 22 without a chisel edge, a chamfer edge 24 and a sharp edge O.
The tool handle and the spiral tool body of the twist drill 1 with the hole-dividing alloy tool bit are integrally provided with cooling holes 32.
The cutter handle (not shown) of the twist drill 1 with the hole-dividing alloy cutter head is a straight handle; or the cutter handle (not shown) of the hole-dividing alloy head twist drill 1 is a taper handle.
According to the experimental result, the service efficiency and the service life of the twist drill are obviously greatly improved, and the structure is proved to be an effective mode for prolonging the service life and improving the efficiency.
Although the above description has been made by taking a tool having two helical blades 4 as an example, the tool of the present invention may have a plurality of helical blades 4, and the configuration of the above-described embodiment and various other combinations of the helical blades 4 may be adopted.
The preferred embodiments described above are illustrative rather than limiting and the invention may be embodied and carried out in other ways without departing from the spirit and essential characteristics thereof, the scope of the invention being indicated by the claims and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (10)
1. A hole-dividing twist drill with alloy cutter bits comprises a cutter handle, spiral cutter bodies and alloy cutter bits, wherein the hole-dividing twist drill with alloy cutter bits is integrally provided with at least two spiral cutter bodies, the surface of each spiral cutter body facing to the cutting direction is formed into a spiral cutting surface, the surface of the outer side of the spiral cutting surface facing backwards in the rotating direction is a spiral auxiliary cutting surface, the spiral cutting surface and the spiral auxiliary cutting surface are intersected to form a spiral cutting edge, the surface of the back side of the axial front end of the spiral cutting surface is formed into a back cutting surface, the back cutting surfaces on at least two sides are intersected to form a cross blade or a sharp blade, the spiral cutting surface and the back cutting surface are intersected to form a cutting edge, and the spiral auxiliary cutting surface and the back cutting surface are intersected to form a side blade,
the method is characterized in that: the hole-dividing alloy cutter head twist drill integrally comprises a cutter handle and spiral cutter bodies, the front end spiral cutting surfaces of the two spiral cutter bodies which are integrally or connected and formed into an integral body are milled with grooves and integrally or connected and formed with an alloy cutter head, the alloy cutter head is integrally formed with two cutting surfaces facing the front end of the rotating direction along the axial center of the twist drill, the spiral cutting surfaces on the two sides of the two spiral cutter bodies which are integrally formed with the alloy cutter head are respectively arranged with the grooves, the spiral cutting edges extend to the alloy cutter head to form auxiliary cutting edges, and the spiral auxiliary cutting surfaces extend to the alloy cutter head to form auxiliary cutting surfaces;
the spiral drill with the hole-dividing alloy tool bit is provided with millimeter-strength micro-tangent planes which are recessed from the cutting surface of the alloy tool bit in the axial center direction along the spiral cutting edge on the outer periphery of the alloy tool bit; the inner side of the micro-section of the alloy cutter head is convexly provided with a millimeter-strength micro-reinforced stress extension table; the millimeter-strength micro-cutting surface of the alloy cutter head is intersected with the auxiliary cutting surface of the outer periphery to form a millimeter-strength micro-cutting edge; the millimeter-strength micro-cutting surface of the alloy cutter head is intersected with the rear cutting surface to form a millimeter-strength cutting micro-blade; the millimeter-strength micro-strengthening stress extending table of the alloy cutter head is intersected with the rear cutting surface to form a millimeter-strength side micro blade;
and the alloy tool bit of the hole-dividing alloy tool bit twist drill is provided with a millimeter-strength hole-dividing platform in a stepped concave manner from the axial center to the cutting surface of the auxiliary cutting edge on the outer periphery; the millimeter-strength hole dividing table of the alloy cutter head is intersected with the rear cutting surface to form a millimeter-strength side micro blade; the top of the alloy cutter head with the millimeter-strength hole-dividing table is intersected with the cutting surface of the inner side bulge to form a millimeter-strength cutting edge; the cutting surface of the alloy cutter head, which is provided with the millimeter-strength hole dividing table and is convex at the inner side, is a dividing cutting surface, and the dividing cutting surface of the alloy cutter head is intersected with the rear cutting surface to form a cutting edge; the width of the slitting section of the alloy cutter head is more than or equal to one third of the radius of the twist drill of the slitting alloy cutter head, and is less than or equal to two thirds of the radius of the twist drill of the slitting alloy cutter head.
2. A hole-dividing twist drill with alloy cutter bits comprises a cutter handle, spiral cutter bodies and alloy cutter bits, wherein the hole-dividing twist drill with alloy cutter bits is integrally provided with at least two spiral cutter bodies, the surface of each spiral cutter body facing to the cutting direction is formed into a spiral cutting surface, the surface of the outer side of the spiral cutting surface facing backwards in the rotating direction is a spiral auxiliary cutting surface, the spiral cutting surface and the spiral auxiliary cutting surface are intersected to form a spiral cutting edge, the surface of the back side of the axial front end of the spiral cutting surface is formed into a back cutting surface, the back cutting surfaces on at least two sides are intersected to form a cross blade or a sharp blade, the spiral cutting surface and the back cutting surface are intersected to form a cutting edge, and the spiral auxiliary cutting surface and the back cutting surface are intersected to form a side blade,
the method is characterized in that: the hole-dividing alloy cutter head twist drill integrally comprises a cutter handle and spiral cutter bodies, the front end spiral cutting surfaces of the two spiral cutter bodies which are integrally or connected and formed into an integral body are milled with grooves and integrally or connected and formed with an alloy cutter head, the alloy cutter head is integrally formed with two cutting surfaces facing the front end of the rotating direction along the axial center of the twist drill, the spiral cutting surfaces on the two sides of the two spiral cutter bodies which are integrally formed with the alloy cutter head are respectively arranged with the grooves, the spiral cutting edges extend to the alloy cutter head to form auxiliary cutting edges, and the spiral auxiliary cutting surfaces extend to the alloy cutter head to form auxiliary cutting surfaces;
the spiral drill with the hole-dividing alloy tool bit is provided with millimeter-strength micro-tangent planes which are recessed from the cutting surface of the alloy tool bit in the axial center direction along the spiral cutting edge on the outer periphery of the alloy tool bit; a micro-strengthening stress extension table with millimeter strength is formed on the inner side of the micro-section of the alloy tool bit of the hole-dividing alloy tool bit twist drill in a protruding mode; the millimeter-strength micro-cutting surface is intersected with the auxiliary cutting surface of the outer periphery to form a millimeter-strength micro-cutting edge; the millimeter-strength micro-cutting surface is intersected with the rear cutting surface to form a millimeter-strength cutting micro-blade; the millimeter-strength micro-stress-strengthening extension table is intersected with the rear cutting surface to form a millimeter-strength side micro blade;
and the alloy tool bit of the hole-dividing alloy tool bit twist drill is provided with a millimeter-strength hole-dividing platform in a stepped concave manner from the axial center to the cutting surface of the auxiliary cutting edge on the outer periphery; the millimeter-strength hole dividing table is intersected with the rear cutting surface to form a millimeter-strength side micro blade; the top of the alloy cutter head with the millimeter-strength hole-dividing table is intersected with the cutting surface of the inner side bulge to form a millimeter-strength cutting edge; the cutting surface of the alloy cutter head, which is provided with the millimeter-strength hole dividing table and is convex at the inner side, is a dividing cutting surface, and the dividing cutting surface of the alloy cutter head is intersected with the rear cutting surface to form a cutting edge; the width of the slitting surface of the alloy cutter head is more than or equal to one third of the radius of the twist drill of the slitting alloy cutter head and less than or equal to two thirds of the radius of the twist drill of the slitting alloy cutter head;
at least one notch edge is arranged on the alloy tool bit cutting edge of the hole-dividing alloy tool bit twist drill; the notch edge extends towards the rear cutting surface to form at least one groove.
3. A hole-dividing twist drill with alloy cutter bits comprises a cutter handle, spiral cutter bodies and alloy cutter bits, wherein the hole-dividing twist drill with alloy cutter bits is integrally provided with at least two spiral cutter bodies, the surface of each spiral cutter body facing to the cutting direction is formed into a spiral cutting surface, the surface of the outer side of the spiral cutting surface facing backwards in the rotating direction is a spiral auxiliary cutting surface, the spiral cutting surface and the spiral auxiliary cutting surface are intersected to form a spiral cutting edge, the surface of the back side of the axial front end of the spiral cutting surface is formed into a back cutting surface, the back cutting surfaces on at least two sides are intersected to form a cross blade or a sharp blade, the spiral cutting surface and the back cutting surface are intersected to form a cutting edge, and the spiral auxiliary cutting surface and the back cutting surface are intersected to form a side blade,
the method is characterized in that: the hole-dividing alloy cutter head twist drill integrally comprises a cutter handle and spiral cutter bodies, the front end spiral cutting surfaces of the two spiral cutter bodies which are integrally or connected and formed into an integral body are milled with grooves and integrally or connected and formed with an alloy cutter head, the alloy cutter head is integrally formed with two cutting surfaces facing the front end of the rotating direction along the axial center of the twist drill, the spiral cutting surfaces on the two sides of the two spiral cutter bodies which are integrally formed with the alloy cutter head are respectively arranged with the grooves, the spiral cutting edges extend to the alloy cutter head to form auxiliary cutting edges, and the spiral auxiliary cutting surfaces extend to the alloy cutter head to form auxiliary cutting surfaces;
the spiral drill with the hole-dividing alloy tool bit is provided with millimeter-strength micro-tangent planes which are recessed from the cutting surface of the alloy tool bit in the axial center direction along the spiral cutting edge on the outer periphery of the alloy tool bit; a micro-strengthening stress extension table with millimeter strength is formed on the inner side of the micro-section of the alloy tool bit of the hole-dividing alloy tool bit twist drill in a protruding mode; the millimeter-strength micro-cutting surface of the alloy cutter head is intersected with the auxiliary cutting surface of the outer periphery to form a millimeter-strength micro-cutting edge; the millimeter-strength micro-section of the alloy cutter head is intersected with the rear cutting surface to form a cutting micro-blade with millimeter strength; the millimeter-strength micro-strengthening stress extending table of the alloy cutter head is intersected with the rear cutting surface to form a millimeter-strength side micro blade;
and the alloy tool bit of the hole-dividing alloy tool bit twist drill is provided with a millimeter-strength hole-dividing platform in a stepped concave manner from the axial center to the cutting surface of the auxiliary cutting edge on the outer periphery; the millimeter-strength hole dividing table is intersected with the rear cutting surface to form a millimeter-strength side micro blade; the top of the millimeter-strength hole-dividing table is intersected with the cutting surface of the inner side bulge to form a millimeter-strength cutting edge; the cutting surface with the millimeter-strength hole dividing table protruding from the inner side is a dividing surface, the dividing surface is intersected with the rear cutting surface to form a cutting edge, and the width of the dividing surface is more than or equal to one third of the radius of the twist drill with the hole dividing alloy tool bit and less than or equal to two thirds of the radius of the twist drill with the hole dividing alloy tool bit;
and at least one stage of raised step and at least one stage of raised rear cutting surface are arranged on the rear cutting surface where the alloy bit of the hole-dividing alloy bit twist drill is positioned in a manner that the height of the rear cutting surface in the direction of the side edge at the outer side is reduced from the axial center, the raised step and the cutting surface at the front end in the rotating direction are intersected to form at least one stage of raised step edge, and the raised rear cutting surface at least one stage of raised cutting edge and the cutting surface at the front end in the rotating direction are intersected to form at least one stage of raised cutting edge.
4. A hole-dividing alloy bit twist drill according to any one of claims 1 to 3,
the method is characterized in that: the cutter handle of the twist drill with the hole-dividing alloy cutter head is a straight handle; or the cutter handle of the twist drill with the hole-dividing alloy cutter head is a taper handle.
5. A hole-dividing alloy bit twist drill according to any one of claims 1 to 3,
the method is characterized in that: the included angle formed by the cutting edge on the outermost side of the alloy tool bit of the hole-dividing alloy tool bit twist drill and the spiral auxiliary cutting edge is an acute angle or a right angle; or an obtuse angle.
6. A hole-dividing alloy bit twist drill according to any one of claims 1 to 3,
the method is characterized in that: the rear cutting surfaces on two sides of the front end of the alloy cutter head of the hole-dividing alloy cutter head twist drill are intersected at the axial center to form a chamfer surface and a chisel edge; or the rear cutting surfaces on the two sides of the front end of the alloy cutter head of the hole-dividing alloy cutter head twist drill are intersected at the axial center to form a chamfer surface and a sharp edge without a chisel edge.
7. A hole-dividing alloy bit twist drill according to any one of claims 1 to 3,
the method is characterized in that: the tool handle and the spiral tool body of the twist drill with the hole-dividing alloy tool bit are integrally provided with cooling holes.
8. A hole-dividing alloy bit twist drill according to any one of claims 1 to 3,
the method is characterized in that: a plurality of notch edges are arranged on the alloy tool bit cutting edge of the hole-dividing alloy tool bit twist drill;
the notch blade extends towards the rear cutting surface to form a plurality of grooves.
9. A hole-dividing alloy bit twist drill according to any one of claims 1 to 3,
the method is characterized in that: the back cutting surface of the alloy bit of the hole-dividing alloy bit twist drill is provided with a plurality of steps and a plurality of convex back cutting surfaces in a mode that the height of the back cutting surface in the direction of the lateral edge at the outer side is reduced from the axial center, the steps which are erected in a plurality of stages are intersected with the cutting surface at the front end in the rotating direction to form a plurality of steps and the convex back cutting surfaces are intersected with the cutting surface at the front end in the rotating direction to form a plurality of convex cutting edges.
10. A hole-dividing alloy bit twist drill according to any one of claims 1 to 3,
the method is characterized in that: at least one or more stages of standing steps and at least one or more stages of raised rear cutting surfaces are arranged on the rear cutting surface where the alloy bit of the hole-dividing alloy bit twist drill is positioned in a manner that the height of the rear cutting surface in the direction of the lateral edge on the outer side is reduced from the axial center, the at least one or more stages of standing steps and the cutting surface at the front end in the rotating direction are intersected to form at least one or more stages of standing step edges, and the at least one or more stages of raised rear cutting surfaces and the cutting surface are intersected to form at least one or more stages of raised cutting edges; and at least one or more notch edges are arranged on the stepped cutting edge of the alloy cutter head with at least one or more steps, and each notch edge extends towards the rear cutting surface to form a groove.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010428191.7A CN112453504A (en) | 2020-05-17 | 2020-05-17 | Twist drill with hole-dividing alloy tool bit |
| PCT/CN2021/000099 WO2021232823A1 (en) | 2020-05-17 | 2021-05-12 | Alloy tool bit twist drill |
| EP21809185.8A EP4155016A4 (en) | 2020-05-17 | 2021-05-12 | TWIST DRILL MADE OF ALLOY TOOL TIP |
| US17/925,466 US20230191507A1 (en) | 2020-05-17 | 2021-05-12 | Alloy tool bit twist drill |
| ZA2022/12762A ZA202212762B (en) | 2020-05-17 | 2022-11-23 | Alloy tool bit twist drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010428191.7A CN112453504A (en) | 2020-05-17 | 2020-05-17 | Twist drill with hole-dividing alloy tool bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112453504A true CN112453504A (en) | 2021-03-09 |
Family
ID=74832812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010428191.7A Withdrawn CN112453504A (en) | 2020-05-17 | 2020-05-17 | Twist drill with hole-dividing alloy tool bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112453504A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021232823A1 (en) * | 2020-05-17 | 2021-11-25 | 李仕清 | Alloy tool bit twist drill |
-
2020
- 2020-05-17 CN CN202010428191.7A patent/CN112453504A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021232823A1 (en) * | 2020-05-17 | 2021-11-25 | 李仕清 | Alloy tool bit twist drill |
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