WO2022257891A1 - 微强化同心麻花钻 - Google Patents

微强化同心麻花钻 Download PDF

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Publication number
WO2022257891A1
WO2022257891A1 PCT/CN2022/097191 CN2022097191W WO2022257891A1 WO 2022257891 A1 WO2022257891 A1 WO 2022257891A1 CN 2022097191 W CN2022097191 W CN 2022097191W WO 2022257891 A1 WO2022257891 A1 WO 2022257891A1
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WIPO (PCT)
Prior art keywords
micro
cutting surface
reinforced
helical
cutting
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PCT/CN2022/097191
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English (en)
French (fr)
Inventor
李仕清
王艾泉
张建华
Original Assignee
山东至伟机械有限公司
安钶国际量仪发展股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority claimed from CN202110651506.9A external-priority patent/CN113510280A/zh
Application filed by 山东至伟机械有限公司, 安钶国际量仪发展股份有限公司 filed Critical 山东至伟机械有限公司
Priority to EP22819489.0A priority Critical patent/EP4342611A1/en
Publication of WO2022257891A1 publication Critical patent/WO2022257891A1/zh

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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
    • 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
    • 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

Definitions

  • the invention relates to a micro-reinforced concentric twist drill.
  • the micro-reinforced concentric twist drill is used in the drilling and milling process of mechanical processing and fitter maintenance. All mechanical products need to be drilled for screw connection.
  • the current processing materials are generally made of materials. With high hardness and high viscosity, the requirements for twist drills are getting higher and higher, and twist drills with high strength, high efficiency and long life are required.
  • the drilling tools used in machining are composed of chisel edge, cutting edge, helical cutting edge, and side edge.
  • the cutting edge is on a helical cutting surface, showing a single co-position cutting structure. Inside, the cutting edge is subjected to the rotating cutting force and the outward transmission force from the center at the same time. Under the action of the double force, the cutting edge at the intersection of the cutting edge and the helical cutting edge is always very easy to be damaged. It is not absolutely balanced and there is a swing phenomenon. Simply relying on the helical cutting surface to stabilize the tool causes damage to the helical cutting surface and the helical cutting edge. It is generally understood that the smoother the surface, the higher the strength. High, therefore, the existing hole machining tools are low in efficiency, easy to damage, poor in stability and poor in drilling accuracy.
  • the present invention is a new product developed in view of the above problems to provide a micro-reinforced concentric twist drill, which has the function of blocking conduction force, high stability, high efficiency, ultra-low resistance, high strength, and super long life, and it is easy to locate during drilling, and the drilling accuracy is high. It is generally believed that the smoother the surface, the higher the strength. In recent years, the new theory is that the surface with small gaps has higher strength. It has been verified by experiments. On the cutting tool under the conventional physical state, the millimeter level has the most obvious high strength characteristic, that is, the millimeter strength.
  • the present invention is the application of micro-strengthening and concentric drilling technology on the twist drill.
  • the present invention adopts the following technical solutions:
  • the micro-reinforced concentric twist drill relates to a drilling tool for mechanical processing, including a tool shank and a tool head, the tool head is integrally provided with at least two helical strips, and the surface of each helical strip facing the cutting direction is formed as a helical cutting Surface, the surface backward along the outer edge of the spiral cutting surface is the spiral secondary cutting surface, the spiral cutting surface and the spiral secondary cutting surface intersect to form a helical cutting edge, and the surface on the top surface side of the axial front end of the spiral strip is formed as the rear cutting surface, At least the rear cutting surfaces on both sides intersect to form a chisel edge, the helical cutting surface and the rear cutting surface intersect to form a cutting edge, and the helical secondary cutting surface and the rear cutting surface intersect to form a side edge,
  • the present invention is the arrangement of symmetrical concentric drilling and micro-strengthening technology on ordinary twist drills,
  • the erected micro-reinforced center drill is symmetrically arranged to extend to the rear cutting surface and protrude to form a center hole drilling tool;
  • the inner side of the micro-reinforced center drill is convexly provided with a micro-reinforced central cutting surface, and the micro-reinforced central cutting surface extends to the axial front and intersects with the rear cutting surface to form a micro-reinforced central drilling edge of the micro-reinforced concentric twist drill;
  • the inner side of the micro-reinforced reaming drill forms a raised reaming cutting surface;
  • the reaming cutting surface extends to the front and intersects with the rear cutting surface to form a reaming cutting edge.
  • the micro-reinforced concentric twist drill relates to a drilling tool for mechanical processing, including a tool shank and a tool head, the tool head is integrally provided with at least two helical strips, and the surface of each helical strip facing the cutting direction is formed as a helical cutting Surface, the surface backward along the outer edge of the spiral cutting surface is the spiral secondary cutting surface, the spiral cutting surface and the spiral secondary cutting surface intersect to form a helical cutting edge, and the surface on the top surface side of the axial front end of the spiral strip is formed as the rear cutting surface, At least the rear cutting surfaces on both sides intersect to form a chisel edge, the helical cutting surface and the rear cutting surface intersect to form a cutting edge, and the helical secondary cutting surface and the rear cutting surface intersect to form a side edge,
  • the present invention is a symmetrical concentric drill on an ordinary twist drill, and the setting of a high-strength helical cutting edge with sharp micro-strengthening technology,
  • the erected micro-reinforced center drill is symmetrically arranged to extend to the rear cutting surface and protrude to form a center hole drilling tool;
  • the inner side of the micro-strengthened center drill is provided with a micro-strengthened central cutting surface in millimeters, and the micro-strengthened central cutting surface extends to the axial front and intersects with the rear cutting surface to form a micro-strengthened center of the micro-strengthened concentric twist drill drilling edge;
  • micro-reinforced concentric twist drill integrally on both sides of the micro-reinforced concentric twist drill, respectively set micro-reinforced wear-resistant grooves on the helical cutting surface in the direction of the inner axial center along the helical cutting edge; the bottom of the micro-reinforced wear-resistant groove is formed along the helical cutting edge
  • a micro-reinforced wear-resistant cutting surface with millimeter strength and a micro-reinforced wear-resistant table is set up on the inner side of the micro-reinforced wear-resistant cutting surface; the micro-reinforced wear-resistant cutting surface extends to the front and intersects with the rear cutting surface to form a micro Reinforced wear-resistant cutting edge.
  • the micro-reinforced concentric twist drill relates to a drilling tool for mechanical processing, including a tool shank and a tool head, the tool head is integrally provided with at least two helical strips, and the surface of each helical strip facing the cutting direction is formed as a helical cutting Surface, the surface backward along the outer edge of the spiral cutting surface is the spiral secondary cutting surface, the spiral cutting surface and the spiral secondary cutting surface intersect to form a helical cutting edge, and the surface on the top surface side of the axial front end of the spiral strip is formed as the rear cutting surface, At least the rear cutting surfaces on both sides intersect to form a chisel edge, the helical cutting surface and the rear cutting surface intersect to form a cutting edge, and the helical secondary cutting surface and the rear cutting surface intersect to form a side edge,
  • the present invention is a symmetrical concentric drill on an ordinary twist drill, and the setting of a high-strength helical cutting edge with sharp micro-strengthening technology,
  • micro-reinforced reaming drills in the central area of the helical cutting surface on both sides of the axial center of the micro-reinforced concentric twist drill, erected micro-reinforced reaming drills are symmetrically arranged; the inner side of the micro-reinforced reaming drill forms a convex The reaming cutting surface is raised; the reaming cutting surface extends to the front and intersects with the rear cutting surface to form a reaming cutting edge;
  • the micro-strengthened wear-resistant groove is set integrally along the helical cutting edge to the inner axial center direction of the helical cutting surface; the bottom of the micro-strengthened wear-resistant groove is formed with a micro-strengthened wear-resistant cutting surface with millimeter strength along the helical cutting edge , a micro-strengthened wear-resistant table is erected on the inner side of the micro-strengthened wear-resistant cutting surface; the micro-strengthened wear-resistant table extends to the front and intersects with the rear cutting surface to form a micro-strengthened wear-resistant drill; the described micro-strengthened wear-resistant The cutting surface extends to the front and intersects with the rear cutting surface to form a micro-strengthened wear-resistant cutting edge.
  • the micro-reinforced concentric twist drill relates to a drilling tool for mechanical processing, including a tool shank and a tool head, the tool head is integrally provided with at least two helical strips, and the surface of each helical strip facing the cutting direction is formed as a helical cutting Surface, the surface backward along the outer edge of the spiral cutting surface is the spiral secondary cutting surface, the spiral cutting surface and the spiral secondary cutting surface intersect to form a helical cutting edge, and the surface on the top surface side of the axial front end of the spiral strip is formed as the rear cutting surface, At least the rear cutting surfaces on both sides intersect to form a chisel edge, the helical cutting surface and the rear cutting surface intersect to form a cutting edge, and the helical secondary cutting surface and the rear cutting surface intersect to form a side edge,
  • the present invention is a symmetrical concentric drill on an ordinary twist drill, and the setting of a high-strength helical cutting edge with sharp micro-strengthening technology,
  • the erected micro-reinforced center drill is symmetrically arranged to extend to the rear cutting surface and protrude to form a center hole drilling tool;
  • the inner side of the micro-reinforced center drill is convexly provided with a micro-reinforced central cutting surface, and the micro-reinforced central cutting surface extends to the axial front and intersects with the rear cutting surface to form a micro-reinforced central drilling edge of the micro-reinforced concentric twist drill;
  • the inner side of the micro-reinforced reaming drill forms a raised reaming cutting surface;
  • the reaming cutting surface extends to the front and intersects with the rear cutting surface to form a reaming cutting edge;
  • the micro-strengthened wear-resistant groove is set integrally along the helical cutting edge to the inner axial center direction of the helical cutting surface; the bottom of the micro-strengthened wear-resistant groove is formed with a micro-strengthened wear-resistant cutting surface with millimeter strength along the helical cutting edge , a micro-strengthened wear-resistant table is erected on the inner side of the micro-strengthened wear-resistant cutting surface; the micro-strengthened wear-resistant table extends to the front and intersects with the rear cutting surface to form a micro-strengthened wear-resistant drill; the described micro-strengthened wear-resistant The cutting surface extends to the front and intersects with the rear cutting surface to form a micro-strengthened wear-resistant cutting edge.
  • the angle between the micro-reinforced wear-resistant cutting surface and the helical secondary cutting surface is smaller than or equal to the angle between the helical secondary cutting surface and the helical secondary cutting surface.
  • the angle formed by the micro-reinforced wear-resistant cutting edge and the side edge is smaller than or equal to the angle formed by the helical secondary cutting surface and the side edge.
  • the rear cutting surfaces on both sides of the micro-reinforced concentric twist drill intersect to form a chisel edge in the axial center, and the chamfers on both sides of the chisel edge of the micro-reinforced concentric twist drill are formed with chamfered surfaces and reduced small chisel;
  • the chamfering on both sides of the chisel edge of the micro-reinforced concentric twist drill forms a chamfered surface and a sharp edge without a chisel edge.
  • cooling holes are provided in the tool shank of the micro-reinforced concentric twist drill and the helix of the tool head.
  • the micro-reinforced concentric twist drill is provided with at least one or more steps in such a way that the height of the rear cutting surface in the direction of the outer side edge decreases from the central chisel edge.
  • the cutting edge of the micro-reinforced concentric twist drill is provided with at least one or more notch edges,
  • the notch edge extends toward the rear cutting surface to form at least one or more grooves.
  • the micro-reinforced concentric twist drill is symmetrically provided with a micro-reinforced concentric center drill and a micro-reinforced concentric center cutting surface along the helical cutting surface on both sides of the axial center, and the micro-reinforced concentric center cutting surface extends along the helical cutting surface to The axial front end intersects with the rear cutting surface to form a concentric cutting edge with a central hole.
  • the helical cutting surfaces on both sides of the micro-reinforced concentric twist drill are respectively symmetrically provided with a micro-reinforced concentric reaming drill and a raised concentric reaming cutting surface at the central position; the concentric reaming The cutting surface extends along the helical cutting surface until the axial front end intersects with the rear cutting surface to form a concentric reaming cutting edge.
  • the helical cutting surfaces on both sides of the micro-reinforced concentric twist drill are provided with micro-reinforced concentric wear-resistant grooves recessed along the helical cutting edge symmetrically along the axial center;
  • the micro-reinforced concentric wear-resistant groove of the micro-reinforced concentric twist drill is provided with a micro-reinforced concentric wear-resistant table and a micro-reinforced concentric wear-resistant cutting surface; the micro-reinforced concentric wear-resistant cutting surface extends along the helical cutting surface to the axial front and rear The cutting surfaces intersect to form a micro-reinforced concentric wear-resistant cutting edge.
  • the micro-reinforced concentric twist drill is symmetrically provided with a micro-reinforced central drill and a micro-reinforced core central cutting surface on the helical cutting surfaces on both sides of the axial center.
  • the micro-reinforced core central cutting surface of the micro-reinforced concentric twist drill extends along the helical cutting surface until the axial front end intersects with the rear cutting surface to form a central drilling edge.
  • the micro-reinforced concentric twist drill is symmetrically provided with a micro-reinforced concentric drill and a micro-reinforced concentric cutting surface on the helical cutting surface on both sides of the axial center, and the micro-reinforced concentric cutting surface extends to the axial front end along the helical cutting surface Intersecting the rear cutting face forms a central drilling edge.
  • the micro-reinforced concentric twist drill always protrudes from the axial center region of the micro-reinforced concentric twist drill to form a raised center hole drilling tool.
  • the height from the micro-strengthened concentric cutting surface to the helical cutting surface of the micro-strengthened central drill of the micro-strengthened concentric twist drill is less than or equal to one tenth of the diameter of the micro-strengthened concentric twist drill.
  • the micro-reinforced central drill or the micro-reinforced concentric drill has the effects of reducing resistance and improving efficiency.
  • the micro-reinforced concentric twist drill is provided with a micro-reinforced reaming drill and a raised concentric reaming cutting surface on the central area of the helical cutting surface symmetrically along the axial center.
  • the reaming cutting surface of the micro-reinforced concentric twist drill extends along the helical cutting surface until the axial front end intersects with the rear cutting surface to form a reaming cutting edge.
  • the micro-reinforced concentric twist drill is symmetrically provided with a micro-reinforced concentric reaming drill and a raised concentric reaming cutting surface on the central area of the helical cutting surface symmetrically along the axial center; the concentric The reaming cutting surface extends along the helical cutting surface until the axial front end intersects with the rear cutting surface to form a concentric reaming cutting edge.
  • the height from the micro-reinforced reaming drill to the helical cutting surface of the micro-reinforced concentric twist drill is less than or equal to one tenth of the diameter of the micro-reinforced concentric twist drill.
  • the micro-reinforced reamer or the micro-reinforced reamer has a balanced and stable effect.
  • the helical cutting surfaces on both sides of the micro-reinforced concentric twist drill are provided with micro-reinforced wear-resistant grooves recessed along the helical cutting edge symmetrically along the axial center.
  • the micro-reinforced wear-resistant groove of the micro-reinforced concentric twist drill is provided with a micro-reinforced wear-resistant platform and a micro-reinforced wear-resistant cutting surface.
  • the micro-reinforced wear-resistant cutting surface of the micro-reinforced concentric twist drill extends along the helical cutting surface until the axial front end intersects with the rear cutting surface to form a micro-reinforced wear-resistant cutting edge.
  • the angle between the micro-reinforced wear-resistant cutting surface and the helical secondary cutting surface of the micro-reinforced concentric twist drill is less than or equal to the angle between the helical cutting surface and the helical secondary cutting surface.
  • the included angle between the micro-reinforced wear-resistant cutting surface and the helical secondary cutting surface of the micro-reinforced concentric twist drill is smaller than the included angle between the helical cutting surface and the helical secondary cutting surface.
  • the angle between the micro-strengthened concentric wear-resistant cutting surface and the helical secondary cutting surface of the micro-strengthened concentric twist drill is equal to the angle between the helical cutting surface and the helical secondary cutting surface.
  • the micro-reinforced concentric wear-resistant cutting surface of the micro-reinforced concentric twist drill extends along the helical cutting surface until the axial front end intersects with the rear cutting surface to form a micro-reinforced concentric wear-resistant cutting edge.
  • the helical cutting surfaces on both sides of the micro-reinforced concentric twist drill are provided with micro-reinforced concentric wear-resistant grooves recessed along the helical cutting edge symmetrically along the axial center;
  • micro-reinforced concentric wear-resistant groove of the micro-reinforced concentric twist drill is provided with a micro-reinforced concentric wear-resistant table and a micro-reinforced concentric wear-resistant cutting surface.
  • the micro-reinforced concentric wear-resistant cutting surface of the micro-reinforced concentric twist drill extends along the helical cutting surface until the axial front end intersects with the rear cutting surface to form a micro-reinforced concentric wear-resistant cutting edge.
  • the height of the micro-reinforced concentric wear-resistant table of the micro-reinforced concentric twist drill is less than or equal to 1 mm.
  • the width of the micro-strengthened wear-resistant cutting surface of the micro-strengthened concentric twist drill is less than or equal to one-sixth of the diameter of the micro-strengthened concentric twist drill.
  • the reduction of the included angle between the micro-strengthened wear-resistant cutting surface and the helical secondary cutting surface of the micro-strengthened concentric twist drill is beneficial to improving the cutting efficiency of the micro-strengthened concentric twist drill.
  • the micro-reinforced wear-resistant groove or the micro-reinforced concentric wear-resistant groove has the effect of prolonging the service life.
  • the micro-reinforced central drill of the micro-reinforced concentric twist drill extends to the intersection of the front end and the rear cutting surface to form a micro-reinforced side edge.
  • the micro-reinforced reaming drill of the micro-reinforced concentric twist drill extends to the front end and the rear cutting surface intersects to form a micro-reinforced side edge.
  • the micro-strengthened wear-resistant table of the micro-strengthened concentric twist drill extends to the intersection of the front end and the rear cutting surface to form a micro-strengthened side edge.
  • the rear cutting surfaces on both sides of the micro-reinforced concentric twist drill intersect to form a chisel edge in the axial center, and the chamfers on both sides of the chisel edge of the micro-reinforced concentric twist drill are formed with chamfered surfaces and reduced small chisel;
  • the chamfering on both sides of the chisel edge of the micro-reinforced concentric twist drill forms a chamfered surface and a sharp edge without a chisel edge.
  • cooling holes are provided in the tool shank of the micro-reinforced concentric twist drill and the helix of the tool head.
  • the micro-reinforced concentric twist drill is provided with at least one step or multiple steps in such a way that the height of the rear cutting surface in the direction of the outer side edge decreases from the central chisel edge.
  • the cutting edge of the micro-reinforced concentric twist drill is provided with at least one notch edge or a plurality of notch edges,
  • the notch edge extends toward the rear cutting surface to form at least one groove or a plurality of grooves.
  • the angle between the outermost cutting edge of the micro-reinforced concentric twist drill and the helical minor cutting edge is an acute angle, a right angle, or an obtuse angle.
  • At least one group of convex structures on the helical cutting surfaces on both sides of the axial center of the micro-reinforced concentric twist drill are symmetrical and within the tolerance range.
  • a twist drill with a diameter of 20 mm was used as the experiment.
  • the same M35 cobalt-containing high-speed steel was heat-treated at the same time and produced in the same batch.
  • the drilling object was forged, quenched and tempered gears.
  • Drilling depth 35mm, blind hole when the rotation speed and feed rate of ordinary twist drills reach the limit, the micro-intensified concentric twist drill can also increase the speed by more than 40%, increase the feed rate by more than 40%, and comprehensive drilling efficiency The increase is more than 0.96 times, and the number of drilling holes is increased by ten to thirty times more than that of ordinary twist drills.
  • Fig. 1 is a schematic cross-sectional top view of a micro-reinforced concentric twist drill according to a first embodiment of the present invention.
  • Fig. 2 is a schematic cross-sectional top view of a micro-reinforced concentric twist drill according to a second embodiment of the present invention.
  • Fig. 3 is a schematic diagram of a partial structure of a micro-reinforced concentric twist drill according to a second embodiment of the present invention.
  • Fig. 4 is a schematic cross-sectional top view of a micro-reinforced concentric twist drill according to a third embodiment of the present invention.
  • Fig. 5 is a schematic cross-sectional top view of a micro-reinforced concentric twist drill according to a fourth embodiment of the present invention.
  • implementations 1-7 a tool with two helical strips is mainly used as an example for illustration.
  • the micro-reinforced concentric twist drill of the first embodiment of the present invention relates to a drilling tool for machining, including a tool handle (not shown) and a tool head, and the tool head is integrally provided with at least two A helix bar B, the surface facing the cutting direction of each helix bar B is formed as a helical cutting surface 5, and the surface on the rear side of the outer side of the helical cutting surface 5 edge is a helical minor cutting surface 7, and the helical cutting surface 5 and the helical minor cutting surface 7 are intersected to form a helical cutting edge 6, the surface of the axial front end back side of the helical cutting surface 5 is formed as a rear cutting surface 8, at least the rear cutting surfaces 8 on both sides intersect to form a chisel edge A, the helical cutting surface 5 and the rear cutting surface The intersection of the surface 8 forms a cutting edge 10, and the intersection of the helical minor cutting surface 7 and the rear cutting surface 8 forms a side edge 11,
  • the present invention is the arrangement of symmetrical concentric drilling and micro-strengthening technology on ordinary twist drills,
  • the micro-reinforced central drill 2 is arranged symmetrically on the helical cutting surface 5 on both sides of the axial center O region of the micro-reinforced concentric twist drill; the micro-reinforced central drill 2 always protrudes from the micro-reinforced concentric twist drill and form a protruding drill center hole cutter 13; the inner side of the micro-reinforced center drill protrudes to set a micro-reinforced central cutting surface 1 in millimeters, and the micro-reinforced central cutting surface 1 Extending to the axial front and intersecting the rear cutting surface to form a micro-reinforced central drilling edge 14 of the micro-reinforced concentric twist drill;
  • micro-strengthened concentric twist drill in the central area of the helical cutting surface 5 extending helically along the axial center O direction on both sides, symmetrically set up the micro-strengthened reaming drill 12; the micro-reinforced reaming A raised reaming cutting surface 3 is formed on the inside of the drill 12 ; the reaming cutting surface 3 extends to the front and intersects with the rear cutting surface 8 to form a reaming cutting edge 9 .
  • the micro-reinforced concentric twist drill is symmetrically provided with a micro-reinforced concentric center drill 13 and a micro-reinforced concentric center cutting surface 1 on the helical cutting surface 5 on both sides of the axial center.
  • micro-reinforced concentric central cutting surface 1 of the micro-reinforced concentric twist drill extends along the helical cutting surface until the axial front end intersects with the rear cutting surface 8 to form a central hole cutting edge 14 .
  • micro-reinforced concentric twist drill always protrudes from the axial center area of the micro-reinforced concentric twist drill to form a raised center hole drilling tool.
  • the height of the micro-strengthened concentric central cutting surface 1 to the helical cutting surface 5 of the micro-strengthened central twist drill of the micro-strengthened concentric twist drill is less than or equal to one tenth of the diameter of the micro-strengthened concentric twist drill.
  • micro-reinforced center drill 13 or the micro-reinforced concentric center drill 13 has the effects of reducing resistance and improving efficiency.
  • the micro-reinforced concentric twist drill is provided with a micro-reinforced concentric reaming drill 12 and a raised concentric reaming cutting surface 3 on the central area of the helical cutting surface 5 symmetrically arranged on the axial center.
  • the concentric reaming cutting surface 3 of the micro-reinforced concentric twist drill extends along the helical cutting surface 5 until the axial front end intersects with the rear cutting surface 8 to form a reaming cutting edge 9 .
  • the height from the micro-reinforced concentric reaming drill 12 to the helical cutting surface of the micro-reinforced concentric twist drill is less than or equal to one tenth of the diameter of the micro-reinforced concentric twist drill.
  • micro-reinforced reamer or micro-reinforced concentric reamer 12 has a balanced and stable effect.
  • the micro-reinforced wear-resistant groove 21 is provided with a micro-reinforced wear-resistant table 15 and The micro-reinforced wear-resistant cutting surface 16 effectively maintains the stability of the micro-reinforced concentric twist drill, reduces the wear of the cutting edge of the micro-reinforced concentric twist drill, and is conducive to continuously maintaining the sharpness of the cutting edge of the tool and improving cutting efficiency.
  • the micro-strengthened concentric twist drill with a diameter of 10.5 was used as the experiment.
  • the same M35 cobalt-containing high-speed steel was heat-treated at the same time and produced in the same batch.
  • the drilling object was forged, quenched and tempered gear finish turning Processing price, drilling depth 35mm, blind hole, micro-intensified concentric twist drill helical sub-hole cutting surface 24 width 2.5mm, helical sub-hole table 23 height 0.8mm, the speed and feed rate of micro-intensified concentric twist drill in ordinary structure
  • the micro-intensified concentric twist drill can also increase the speed by 40%, increase the feed rate by 40%, and increase the comprehensive drilling efficiency by 0.96 times.
  • the micro-intensified concentric twist drill with ordinary structure can drill 312 holes, and the micro-intensified concentric twist drill There are 4376 drilling holes, and the number of drilling holes is more than fourteen times more than that of the micro-strengthened concentric twist drill than the micro-strengthened concentric twist drill of ordinary structure.
  • the micro-reinforced concentric twist drill of the second embodiment of the present invention is comprehensively used on the basis of the first embodiment, and relates to a drilling tool for machining, Including a tool handle (not shown) and a cutter head, the cutter head is integrally provided with at least two helical strips B, and the surface of each helical strip B facing the cutting direction is formed as a helical cutting surface 5, and the outer edge of the helical cutting surface 5
  • the face on the rear side is a helical secondary cutting surface 7, and the helical cutting surface 5 intersects with the helical secondary cutting surface 7 to form a helical cutting edge 6, and the surface on the axial front end back side of the helical cutting surface 5 is formed as a rear cutting surface 8, at least two The side rear cutting surface 8 intersects to form a chisel edge A, the helical cutting surface 5 intersects with the rear cutting surface 8 to form a cutting edge 10, the helical minor
  • the present invention is a symmetrical concentric drill on an ordinary twist drill, and the setting of a high-strength helical cutting edge with sharp micro-strengthening technology,
  • the micro-reinforced central drill 2 is arranged symmetrically on the helical cutting surface 5 on both sides of the axial center O region of the micro-reinforced concentric twist drill; the micro-reinforced central drill 2 always protrudes from the micro-reinforced concentric twist drill and form a protruding drill center hole cutter 13; the inner side of the micro-reinforced center drill protrudes to set a micro-reinforced central cutting surface 1 in millimeters, and the micro-reinforced central cutting surface 1 Extending to the axial front and intersecting the rear cutting surface to form a micro-reinforced central drilling edge 14 of the micro-reinforced concentric twist drill;
  • the micro-reinforced wear-resistant groove 16 is set on the helical cutting surface 5 recessed along the helical cutting edge 6 to the inner axial center O direction respectively; the bottom of the micro-reinforced wear-resistant groove 16 A micro-reinforced wear-resistant cutting surface 17 with millimeter strength is formed along the spiral cutting edge 6, and a micro-reinforced wear-resistant table 15 is set up on the inner side of the micro-reinforced wear-resistant cutting surface 17; the micro-reinforced wear-resistant cutting surface 17 extends A micro-reinforced wear-resistant cutting edge 18 is formed at the intersection of the front and the rear cutting surface 8 .
  • the micro-reinforced concentric twist drill is symmetrically provided with a micro-reinforced concentric center drill 13 and a micro-reinforced concentric center cutting surface 1 on the helical cutting surface 5 on both sides of the axial center.
  • micro-reinforced concentric central cutting surface 1 of the micro-reinforced concentric twist drill extends along the helical cutting surface until the axial front end intersects with the rear cutting surface 8 to form a central hole cutting edge 14 .
  • the height from the micro-strengthened concentric central cutting surface 1 to the helical cutting surface 5 of the micro-strengthened central drill 13 of the micro-strengthened concentric twist drill is less than or equal to one tenth of the diameter of the micro-strengthened concentric twist drill.
  • micro-reinforced center drill 13 or the micro-reinforced concentric center drill 13 has the effects of reducing resistance and improving efficiency.
  • micro-reinforced concentric wear-resistant grooves 16 are provided symmetrically along the axial center along the helical cutting edge 6 .
  • the micro-reinforced concentric wear-resistant groove 16 of the micro-reinforced concentric twist drill is provided with a micro-reinforced concentric wear-resistant table 15 and a micro-reinforced concentric wear-resistant cutting surface 17 .
  • the angle ⁇ 2 between the micro-reinforced wear-resistant cutting surface 17 and the helical secondary cutting surface 7 of the micro-reinforced concentric twist drill is equal to the angle ⁇ 1 between the helical cutting surface 5 and the helical secondary cutting surface 7 .
  • the included angle ⁇ 2 between the micro-reinforced wear-resistant cutting surface 17 and the helical secondary cutting surface 7 of the micro-reinforced concentric twist drill is smaller than the included angle ⁇ 1 between the helical cutting surface 5 and the helical secondary cutting surface 7 .
  • micro-reinforced concentric wear-resistant cutting surface 17 of the micro-reinforced concentric twist drill extends along the helical cutting surface 5 until the axial front end intersects with the rear cutting surface 8 to form a micro-reinforced concentric wear-resistant cutting edge 18 .
  • the micro-reinforced wear-resistant groove 16 or the micro-reinforced concentric wear-resistant groove 16 has the effect of prolonging the service life.
  • Micro-reinforced wear-resistant cutting surfaces 17 are arranged symmetrically on the helical cutting surfaces 5 on both sides of the axial center of the micro-reinforced concentric twist drill.
  • the height of the micro-reinforced concentric wear-resistant table 15 of the micro-reinforced concentric twist drill is less than or equal to 1 mm.
  • the width of the micro-reinforced wear-resistant cutting surface 17 of the micro-reinforced concentric twist drill is less than or equal to one-sixth of the diameter of the micro-reinforced concentric twist drill.
  • the micro-reinforced wear-resistant groove 21 Since the angle ⁇ 2 between the micro-reinforced wear-resistant cutting surface 16 of the micro-reinforced concentric twist drill and the helical secondary cutting surface 5 is smaller than the angle ⁇ 1 between the helical cutting surface 3 and the helical secondary cutting surface 5, the micro-reinforced wear-resistant groove 21 or The micro-reinforced concentric twist drill of the micro-reinforced concentric wear-resistant groove 21 has low resistance and higher cutting efficiency.
  • the micro-reinforced wear-resistant groove 21 is provided with a micro-reinforced wear-resistant table 15 and The micro-reinforced wear-resistant cutting surface 16 effectively maintains the stability of the micro-reinforced concentric twist drill, reduces the wear of the cutting edge of the micro-reinforced concentric twist drill, and is conducive to continuously maintaining the sharpness of the cutting edge of the tool and improving cutting efficiency.
  • micro-strengthened concentric twist drill with a diameter of 10.0 was used as the experiment.
  • the same M35 cobalt-containing high-speed steel was heat-treated at the same time and produced in the same batch.
  • the drilling object was forged, quenched and tempered gear finish turning Processing price, drilling depth 35mm, blind hole, micro-intensified concentric twist drill helical cutting surface 13 wide 3.5mm, spiral stepped center table 10 high 0.6mm, in the ordinary structure of micro-intensified concentric twist drill speed and feed rate reach the limit
  • the micro-intensified concentric twist drill can also increase the speed by 40%, increase the feed rate by 40%, and increase the comprehensive drilling efficiency by 0.96 times.
  • the micro-intensified concentric twist drill with ordinary structure can drill 312 holes, and the micro-intensified concentric twist drill There are 3,798 holes, and the number of drilled holes is more than twelve times more than that of the micro-reinforced concentric twist drill than the ordinary structure of the micro-reinforced concentric twist drill.
  • the use efficiency of the micro-reinforced concentric twist drill is very high, but the service life is obviously not as good as the effect of setting the reaming cutting surface 13 and the micro-reinforced reaming drill 14 on the outside, but this structure is still better than the ordinary micro-reinforced concentric twist drill. It has the effect of prolonging service life and improving efficiency.
  • the micro-reinforced concentric twist drill of the third embodiment of the present invention is comprehensively used on the basis of the first to second embodiments, and relates to a drilling tool for machining, Including a tool handle (not shown) and a cutter head, the cutter head is integrally provided with at least two helical strips B, and the surface of each helical strip B facing the cutting direction is formed as a helical cutting surface 5, and the outer edge of the helical cutting surface 5
  • the face on the rear side is a helical secondary cutting surface 7, and the helical cutting surface 5 intersects with the helical secondary cutting surface 7 to form a helical cutting edge 6, and the surface on the axial front end back side of the helical cutting surface 5 is formed as a rear cutting surface 8, at least two The side rear cutting surface 8 intersects to form a chisel edge A, the helical cutting surface 5 intersects with the rear cutting surface 8 to form a cutting edge 10, the helical minor cutting surface 7 intersect
  • the present invention is a symmetrical concentric drill on an ordinary twist drill, and the setting of a high-strength helical cutting edge with sharp micro-strengthening technology,
  • the micro-reinforced concentric twist drill in the central area of the helical cutting surface 5 extending helically along the axial center O direction on both sides, the micro-reinforced reaming drill 12 erected is symmetrically arranged; the micro-reinforced reaming drill 12 A raised reaming cutting surface 3 is formed on the inner side; the reaming cutting surface 3 extends to the front and intersects with the rear cutting surface 8 to form a reaming cutting edge 9;
  • the micro-reinforced wear-resistant groove 16 is set on the helical cutting surface 5 recessed along the helical cutting edge 6 to the inner axial center O direction respectively; the bottom of the micro-reinforced wear-resistant groove 16 A micro-reinforced wear-resistant cutting surface 17 with millimeter strength is formed along the spiral cutting edge 6, and a micro-reinforced wear-resistant table 15 is set up on the inner side of the micro-reinforced wear-resistant cutting surface 17; the micro-reinforced wear-resistant cutting surface 17 extends A micro-reinforced wear-resistant cutting edge 18 is formed at the intersection of the front and the rear cutting surface 8 .
  • the micro-reinforced concentric twist drill is provided with a micro-reinforced concentric reaming drill and a raised concentric reaming cutting surface on the central area of the helical cutting surface symmetrically along the axial center.
  • the concentric reaming cutting surface of the micro-reinforced concentric twist drill extends along the helical cutting surface until the axial front end intersects with the rear cutting surface to form a reaming cutting edge.
  • the height of the micro-strengthened concentric reaming drill to the helical cutting surface of the micro-strengthened concentric twist drill is less than or equal to one tenth of the diameter of the micro-strengthened concentric twist drill.
  • micro-reinforced reamer or micro-reinforced concentric reamer has a balanced and stable effect.
  • the helical cutting surfaces on both sides of the micro-reinforced concentric twist drill are provided with micro-reinforced concentric wear-resistant grooves recessed along the helical cutting edge symmetrically along the axial center.
  • micro-reinforced concentric wear-resistant groove of the micro-reinforced concentric twist drill is provided with a micro-reinforced concentric wear-resistant table and a micro-reinforced concentric wear-resistant cutting surface.
  • the angle between the micro-reinforced wear-resistant cutting surface and the helical secondary cutting surface of the micro-reinforced concentric twist drill is smaller than or equal to the angle between the helical cutting surface and the helical secondary cutting surface.
  • the included angle between the micro-reinforced wear-resistant cutting surface and the helical secondary cutting surface of the micro-reinforced concentric twist drill is smaller than the included angle between the helical cutting surface and the helical secondary cutting surface.
  • the angle between the micro-strengthened concentric wear-resistant cutting surface and the helical secondary cutting surface of the micro-strengthened concentric twist drill is equal to the angle between the helical cutting surface and the helical secondary cutting surface.
  • micro-reinforced concentric wear-resistant cutting surface of the micro-reinforced concentric twist drill extends along the helical cutting surface until the axial front end intersects with the rear cutting surface to form a micro-reinforced concentric wear-resistant cutting edge.
  • micro-reinforced wear-resistant groove or the micro-reinforced concentric wear-resistant groove has the effect of prolonging the service life.
  • Micro-reinforced wear-resistant cutting surfaces are arranged symmetrically on the helical cutting surfaces on both sides of the axial center of the micro-reinforced concentric twist drill.
  • the height of the micro-reinforced concentric wear-resistant table of the micro-reinforced concentric twist drill is less than or equal to 1 mm.
  • the width of the micro-strengthened wear-resistant cutting surface of the micro-strengthened concentric twist drill is less than or equal to one-sixth of the diameter of the micro-strengthened concentric twist drill.
  • the micro-reinforced wear-resistant groove 21 Since the angle ⁇ 2 between the micro-reinforced wear-resistant cutting surface 16 of the micro-reinforced concentric twist drill and the helical secondary cutting surface 5 is smaller than the angle ⁇ 1 between the helical cutting surface 3 and the helical secondary cutting surface 5, the micro-reinforced wear-resistant groove 21 or The micro-reinforced concentric twist drill of the micro-reinforced concentric wear-resistant groove 21 has low resistance and higher cutting efficiency.
  • the micro-reinforced wear-resistant groove 21 is provided with a micro-reinforced wear-resistant table 15 and The micro-reinforced wear-resistant cutting surface 16 effectively maintains the stability of the micro-reinforced concentric twist drill, reduces the wear of the cutting edge of the micro-reinforced concentric twist drill, and is conducive to continuously maintaining the sharpness of the cutting edge of the tool and improving cutting efficiency.
  • a chisel edge A is formed by intersecting the rear cutting surfaces on both sides of the micro-reinforced concentric twist drill, or a chamfer surface (not shown) is formed by chamfering at both ends of the chisel edge A, and a chamfer edge (not shown) is formed. ) After chamfering the original chisel edge A, it is formed into a reduced chisel edge A or a sharp edge (not shown) without chisel edge A, because the reduction or elimination of the chisel edge greatly reduces the huge resistance.
  • the drilling cutting is a circular motion
  • a centrifugal force is generated during the circular motion, causing the rapid wear of the helical cutting edge 16, the micro-reinforced wear-resistant table 6 and the micro-reinforced wear-resistant groove 9
  • the force of the cutting surface 7 is transferred to the inner helical cutting edge and the helical cutting surface, while the micro-reinforced wear-resistant cutting surface 7 extends to the front and the rear cutting surface intersects to form a micro-reinforced wear-resistant cutting edge 18 that has high strength and wear resistance.
  • the wear effect keeps the cutting edge sharp, reduces the overall cutting resistance, lowers the temperature of the tool head 1, and decomposes the force on the cutting edge at the outer end of the tool, which is the most vulnerable to damage, so that the service life of the tool is prolonged, and it can be maintained during the machining process. Keep the intensity high.
  • the micro-strengthened concentric twist drill with a diameter of 10.5 was used as the experiment.
  • the same M35 cobalt-containing high-speed steel was heat-treated at the same time and produced in the same batch.
  • the drilling object was forged, quenched and tempered gear finish turning Processing price, drilling depth 35mm, blind hole, micro-reinforced concentric twist drill spiral micro-section 1817 width 1.5mm, micro-reinforced wear-resistant table 2016 height 0.6mm, the speed and feed rate of the micro-reinforced concentric twist drill with ordinary structure reach In extreme cases, the micro-intensified concentric twist drill can also increase the speed by 40%, increase the feed rate by 40%, and increase the comprehensive drilling efficiency by 0.96 times.
  • the micro-intensified concentric twist drill with ordinary structure can drill 312 holes, and the micro-intensified concentric twist drill There are 5308 drilling holes, and the number of micro-strengthened concentric twist drills is more than 16 times more than that of ordinary structure micro-strengthened concentric twist drills.
  • the micro-reinforced concentric twist drill of the fourth embodiment of the present invention is comprehensively used on the basis of the first to third embodiments, and relates to a drilling tool for machining, Including a tool handle (not shown) and a cutter head, the cutter head is integrally provided with at least two helical strips B, and the surface of each helical strip B facing the cutting direction is formed as a helical cutting surface 5, and the outer edge of the helical cutting surface 5
  • the face on the rear side is a helical secondary cutting surface 7, and the helical cutting surface 5 intersects with the helical secondary cutting surface 7 to form a helical cutting edge 6, and the surface on the axial front end back side of the helical cutting surface 5 is formed as a rear cutting surface 8, at least two The side rear cutting surface 8 intersects to form a chisel edge A, the helical cutting surface 5 intersects with the rear cutting surface 8 to form a cutting edge 10, the helical minor cutting surface 7 intersect
  • the present invention is a symmetrical concentric drill on an ordinary twist drill, and the setting of a high-strength helical cutting edge with sharp micro-strengthening technology,
  • the micro-reinforced central drill 2 is arranged symmetrically on the helical cutting surface 5 on both sides of the axial center O region of the micro-reinforced concentric twist drill; the micro-reinforced central drill 2 always protrudes from the micro-reinforced concentric twist drill and form a protruding drill center hole cutter 13; the inner side of the micro-reinforced center drill protrudes to set a micro-reinforced central cutting surface 1 in millimeters, and the micro-reinforced central cutting surface 1 Extending to the axial front and intersecting the rear cutting surface to form a micro-reinforced central drilling edge 14 of the micro-reinforced concentric twist drill;
  • micro-strengthened concentric twist drill in the central area of the helical cutting surface 5 extending helically along the axial center O direction on both sides, symmetrically set up the micro-strengthened reaming drill 12; the micro-reinforced reaming
  • the inner side of the drill 12 forms a raised reaming cutting surface 3; the reaming cutting surface 3 extends to the front and intersects with the rear cutting surface 8 to form a reaming cutting edge 9;
  • the micro-reinforced wear-resistant groove 16 is set on the helical cutting surface 5 recessed along the helical cutting edge 6 to the inner axial center O direction respectively; the bottom of the micro-reinforced wear-resistant groove 16 A micro-reinforced wear-resistant cutting surface 17 with millimeter strength is formed along the spiral cutting edge 6, and a micro-reinforced wear-resistant table 15 is set up on the inner side of the micro-reinforced wear-resistant cutting surface 17; the micro-reinforced wear-resistant cutting surface 17 extends A micro-reinforced wear-resistant cutting edge 18 is formed at the intersection of the front and the rear cutting surface 8 .
  • the micro-reinforced wear-resistant groove 21 Since the angle ⁇ 2 between the micro-reinforced wear-resistant cutting surface 16 and the helical secondary cutting surface 7 of the micro-reinforced concentric twist drill is smaller than the angle ⁇ 1 between the helical cutting surface 5 and the helical secondary cutting surface 7, the micro-reinforced wear-resistant groove 21 or The micro-reinforced concentric twist drill of the micro-reinforced concentric wear-resistant groove 21 has low resistance and higher cutting efficiency.
  • the micro-reinforced wear-resistant groove 21 is provided with a micro-reinforced wear-resistant table 15 and The micro-reinforced wear-resistant cutting surface 16 effectively maintains the stability of the micro-reinforced concentric twist drill, reduces the wear of the cutting edge of the micro-reinforced concentric twist drill, and is conducive to continuously maintaining the sharpness of the cutting edge of the tool and improving cutting efficiency.
  • the micro-strengthened concentric twist drill with a diameter of 10.5 was used as the experiment.
  • the same M35 cobalt-containing high-speed steel was heat-treated at the same time and produced in the same batch.
  • the drilling object was forged, quenched and tempered gear finish turning Processing price, drilling depth 35mm, blind hole, micro-intensified concentric twist drill helical sub-hole cutting surface 3 width 2.5mm, helical sub-hole table 12 height 0.8mm, the speed and feed rate of micro-intensified concentric twist drill in ordinary structure
  • the micro-intensified concentric twist drill can also increase the speed by 40%, increase the feed rate by 40%, and increase the comprehensive drilling efficiency by 0.96 times.
  • the micro-intensified concentric twist drill with ordinary structure can drill 312 holes, and the micro-intensified concentric twist drill There are 3,376 drilling holes, and the number of drilling holes is more than ten times more than that of micro-strengthened concentric twist drills than ordinary structure micro-strengthened concentric twist drills.
  • the micro-reinforced concentric twist drill of the fifth embodiment of the present invention relates to a drilling tool for machining, including a tool holder (not shown)
  • the cutter head With the cutter head, the cutter head is integrally provided with at least two helical strips B, and the surface facing the cutting direction of each helical strip B is formed as a helical cutting surface 5, and the surface on the outer rear side of the helical cutting surface 5 edge is a helical secondary cutting Surface 7, helical cutting surface 5 intersects with helical secondary cutting surface 7 to form a helical cutting edge 6, the surface on the axial front end back side of the helical cutting surface 5 is formed as a rear cutting surface 8, at least the rear cutting surfaces 8 on both sides intersect to form There is a chisel edge A, the helical cutting surface 5 intersects with the rear cutting surface 8 to form a cutting edge 10, the helical minor cutting surface 7 intersects with the rear cutting
  • the present invention is the arrangement of symmetrical concentric drilling and micro-strengthening technology on ordinary twist drills,
  • the micro-reinforced central drill 2 is arranged symmetrically on the helical cutting surface 5 on both sides of the axial center O region of the micro-reinforced concentric twist drill; the micro-reinforced central drill 2 always protrudes from the micro-reinforced concentric twist drill and form a protruding drill center hole cutter 13; the inner side of the micro-reinforced center drill protrudes to set a micro-reinforced central cutting surface 1 in millimeters, and the micro-reinforced central cutting surface 1 Extending to the axial front and intersecting the rear cutting surface to form a micro-reinforced central drilling edge 14 of the micro-reinforced concentric twist drill.
  • the micro-reinforced concentric twist drill is symmetrically provided with a micro-reinforced concentric center drill 13 and a micro-reinforced concentric center cutting surface 1 on the helical cutting surface 5 on both sides of the axial center.
  • micro-reinforced concentric central cutting surface 1 of the micro-reinforced concentric twist drill extends along the helical cutting surface until the axial front end intersects with the rear cutting surface 8 to form a central hole cutting edge 14 .
  • micro-reinforced concentric twist drill always protrudes from the axial center area of the micro-reinforced concentric twist drill to form a raised center hole drilling tool.
  • the height of the micro-strengthened concentric central cutting surface 1 to the helical cutting surface 5 of the micro-strengthened central twist drill of the micro-strengthened concentric twist drill is less than or equal to one tenth of the diameter of the micro-strengthened concentric twist drill.
  • micro-reinforced center drill 13 or the micro-reinforced concentric center drill 13 has the effects of reducing resistance and improving efficiency.
  • the concentric reaming cutting surface 3 of the micro-reinforced concentric twist drill extends along the helical cutting surface 5 until the axial front end intersects with the rear cutting surface 8 to form a reaming cutting edge 9 .
  • the micro-reinforced wear-resistant groove 21 is provided with a micro-reinforced wear-resistant table 15 and The micro-reinforced wear-resistant cutting surface 16 effectively maintains the stability of the micro-reinforced concentric twist drill, reduces the wear of the cutting edge of the micro-reinforced concentric twist drill, and is conducive to continuously maintaining the sharpness of the cutting edge of the tool and improving cutting efficiency.
  • the micro-strengthened concentric twist drill of the sixth embodiment of the present invention relates to a drilling tool for machining, including a tool shank (not shown) and a tool head, and the tool head is integrally provided with at least two helical twist drills Bar B, the surface facing the cutting direction of each helical bar B is formed as a helical cutting surface 5, and the surface behind the outer side of the edge of the helical cutting surface 5 is a helical minor cutting surface 7, and the helical cutting surface 5 and the helical minor cutting surface 7 intersect A helical cutting edge 6 is formed, and the surface on the back side of the axial front end of the helical cutting surface 5 is formed as a rear cutting surface 8, and at least the rear cutting surfaces 8 on both sides intersect to form a chisel edge A, and the helical cutting surface 5 and the rear cutting surface 8 Intersecting to form a cutting edge 10, the helical minor cutting surface 7 intersects with the rear cutting surface 8 to form a side edge
  • the present invention is the arrangement of symmetrical concentric drilling and micro-strengthening technology on ordinary twist drills,
  • micro-strengthened concentric twist drill in the central area of the helical cutting surface 5 extending helically along the axial center O direction on both sides, symmetrically set up the micro-strengthened reaming drill 12; the micro-reinforced reaming A raised reaming cutting surface 3 is formed on the inside of the drill 12 ; the reaming cutting surface 3 extends to the front and intersects with the rear cutting surface 8 to form a reaming cutting edge 9 .
  • micro-reinforced concentric twist drill always protrudes from the axial center area of the micro-reinforced concentric twist drill to form a raised center hole drilling tool.
  • the micro-reinforced concentric twist drill is provided with a micro-reinforced concentric reaming drill 12 and a raised concentric reaming cutting surface 3 on the central area of the helical cutting surface 5 symmetrically arranged on the axial center.
  • the concentric reaming cutting surface 3 of the micro-reinforced concentric twist drill extends along the helical cutting surface 5 until the axial front end intersects with the rear cutting surface 8 to form a reaming cutting edge 9 .
  • the height from the micro-reinforced concentric reaming drill 12 to the helical cutting surface of the micro-reinforced concentric twist drill is less than or equal to one tenth of the diameter of the micro-reinforced concentric twist drill.
  • micro-reinforced reamer or micro-reinforced concentric reamer 12 has a balanced and stable effect.
  • the micro-reinforced wear-resistant groove 21 is provided with a micro-reinforced wear-resistant table 15 and The micro-reinforced wear-resistant cutting surface 16 effectively maintains the stability of the micro-reinforced concentric twist drill, reduces the wear of the cutting edge of the micro-reinforced concentric twist drill, and is conducive to continuously maintaining the sharpness of the cutting edge of the tool and improving cutting efficiency.
  • the micro-strengthened concentric twist drill of the seventh embodiment of the present invention is comprehensively used on the basis of the first embodiment, and relates to a drilling tool for machining, including a tool holder (not shown Shown) and the tool head, the tool head is integrally provided with at least two helical strips B, and the surface facing the cutting direction of each helical strip B is formed as a helical cutting surface 5, and the surface on the outer rear side of the helical cutting surface 5 edge is The helical minor cutting surface 7, the helical cutting surface 5 and the helical minor cutting surface 7 intersect to form a helical cutting edge 6, and the surface on the axial front end back side of the helical cutting surface 5 is formed as a rear cutting surface 8, and at least the rear cutting surfaces on both sides 8 intersects to form a chisel edge A, the helical cutting surface 5 intersects with the rear cutting surface 8 to form a cutting edge 10, the helical minor cutting surface 7 intersects
  • the present invention is a symmetrical concentric drill on an ordinary twist drill, and the setting of a high-strength helical cutting edge with sharp micro-strengthening technology,
  • the micro-reinforced wear-resistant groove 16 is set on the helical cutting surface 5 recessed along the helical cutting edge 6 to the inner axial center O direction respectively; the bottom of the micro-reinforced wear-resistant groove 16 A micro-reinforced wear-resistant cutting surface 17 with millimeter strength is formed along the spiral cutting edge 6, and a micro-reinforced wear-resistant table 15 is set up on the inner side of the micro-reinforced wear-resistant cutting surface 17; the micro-reinforced wear-resistant cutting surface 17 extends A micro-reinforced wear-resistant cutting edge 18 is formed at the intersection of the front and the rear cutting surface 8 .
  • micro-reinforced concentric wear-resistant grooves 16 are provided symmetrically along the axial center along the helical cutting edge 6 .
  • the micro-reinforced concentric wear-resistant groove 16 of the micro-reinforced concentric twist drill is provided with a micro-reinforced concentric wear-resistant table 15 and a micro-reinforced concentric wear-resistant cutting surface 17 .
  • the angle ⁇ 2 between the micro-reinforced wear-resistant cutting surface 17 and the helical secondary cutting surface 7 of the micro-reinforced concentric twist drill is equal to the angle ⁇ 1 between the helical cutting surface 5 and the helical secondary cutting surface 7 .
  • the included angle ⁇ 2 between the micro-reinforced wear-resistant cutting surface 17 and the helical secondary cutting surface 7 of the micro-reinforced concentric twist drill is smaller than the included angle ⁇ 1 between the helical cutting surface 5 and the helical secondary cutting surface 7 .
  • micro-reinforced concentric wear-resistant cutting surface 17 of the micro-reinforced concentric twist drill extends along the helical cutting surface 5 until the axial front end intersects with the rear cutting surface 8 to form a micro-reinforced concentric wear-resistant cutting edge 18 .
  • the micro-reinforced wear-resistant groove 16 or the micro-reinforced concentric wear-resistant groove 16 has the effect of prolonging the service life.
  • Micro-reinforced wear-resistant cutting surfaces 17 are symmetrically arranged on the helical cutting surfaces 5 on both sides of the axial center on the described micro-reinforced concentric twist drill.
  • the height of the micro-reinforced concentric wear-resistant table 15 of the micro-reinforced concentric twist drill is less than or equal to 1 mm.
  • the width of the micro-reinforced wear-resistant cutting surface 17 of the micro-reinforced concentric twist drill is less than or equal to one-sixth of the diameter of the micro-reinforced concentric twist drill.
  • the micro-reinforced wear-resistant groove 21 Since the angle ⁇ 2 between the micro-reinforced wear-resistant cutting surface 16 of the micro-reinforced concentric twist drill and the helical secondary cutting surface 5 is smaller than the angle ⁇ 1 between the helical cutting surface 3 and the helical secondary cutting surface 5, the micro-reinforced wear-resistant groove 21 or The micro-reinforced concentric twist drill of the micro-reinforced concentric wear-resistant groove 21 has low resistance and higher cutting efficiency.
  • the cutter of the present invention can also have a plurality of helical strips B, and on each helical strip B, the structure of the above embodiment and other multiple combination of forms.

Abstract

一种微强化同心麻花钻，在麻花钻的切削面上应用同心钻和微强化技术，在轴向中心区域两侧的螺旋切削面（5）上对称的设置立起的微强化中心钻（2），延伸至后切削面（5）并凸出的形成钻中心孔刀（13）；微强化中心钻（2）的内侧凸起的设置有微强化中心切削面（1），微强化中心切削面（1）延伸至轴向前方与后切削面（5）相交形成微强化同心麻花钻的微强化中心钻孔刃（14）；和/或一体地在轴向中心两侧的螺旋切削面（5）的中心区域，对称的设置立起的微强化扩孔钻（12）；微强化扩孔钻（12）的内侧形成凸起的扩孔切削面（3）；扩孔切削面（3）延伸至前方与后切削面相交形成有扩孔切削刃（9）；和/或一体地在微强化同心麻花钻的两侧，分别沿螺旋切削刃（10）向内侧轴向中心方向的螺旋切削面上凹陷的设置微强化耐磨槽（16）。微强化后的麻花钻可以提高切削效率，延长使用寿命。

Description

微强化同心麻花钻 技术领域
本发明涉及一种微强化同心麻花钻，该微强化同心麻花钻用于机械加工的钻铣工艺及钳工维修中，所有的机械产品上螺杆联接的都需要钻孔，目前的加工材料普遍的材质硬度高，粘度大，对麻花钻的要求也越来越高，需要高强度，高效率，长寿命的麻花钻。
背景技术
目前，机械加工中使用的钻孔刀具由横刃，切削刃，螺旋切削刃，侧刃构成，切削刃在一个螺旋切削面上，呈单一的同位切削结构，切削刃在旋转切削的离心力传导范围内，切削刃同时受到旋转切削力和中心向外的传导力，在双力作用下切削刃和螺旋切削刃相交处的刃口总是极易损坏，现有孔加工刀具在钻孔时由于结构并不绝对平衡而出现摆动现象，单纯靠螺旋切削面稳定刀具造成螺旋切削面和螺旋切削刃损坏，人们普遍的认识是表面越光滑强度越高，新的理论则是有微小间隙的面强度更高，因此，现有孔加工刀具效率低，易损坏，稳定性差，钻孔精度差。
发明内容
本发明就是鉴于上述的问题而开发的新产品，以提供一种微强化同心麻花钻，该种刀具具有阻断传导力的功能，高稳定性，高效率，超低阻，高强度，超长寿命，且在钻削加工时容易定位，钻孔精度高，人们普遍的认识是表面越光滑强度越高，最近几年的新的理论则是有微小间隙的面强度更高，经过实验验证在常规物理状态下的切削工具上，毫米量级有最明显的高强度特性即毫米强度，本发明是在麻花钻上进行微强化和同心钻技术的应用。
为达到上述目的，本发明采用下述技术方案：
微强化同心麻花钻，涉及用于机械加工的钻孔刀具，包括刀具柄和刀具头， 刀具头一体地设置有至少两个螺旋条，在每个螺旋条的朝向切削方向的面形成为螺旋切削面，沿螺旋切削面外边缘向后的面为螺旋副切削面，螺旋切削面与螺旋副切削面相交形成有螺旋切削刃，螺旋条的轴向前端顶面侧的面形成为后切削面，至少两侧的后切削面相交形成有横刃，螺旋切削面与后切削面相交形成有切削刃，螺旋副切削面与后切削面相交形成有侧刃，
本发明是在普通麻花钻上进行对称的同心钻和微强化技术的设置，
其特征在于：在所述微强化同心麻花钻轴向中心区域两侧的螺旋切削面上对称的设置立起的微强化中心钻延伸至后切削面并凸出的形成钻中心孔刀具；所述的微强化中心钻的内侧凸起的设置有微强化中心切削面，所述的微强化中心切削面延伸至轴向前方与后切削面相交形成微强化同心麻花钻的微强化中心钻孔刃；
和一体地在轴向中心两侧的螺旋切削面的中心区域，对称的设置立起的微强化扩孔钻；所述的微强化扩孔钻的内侧形成凸起的扩孔切削面；所述的扩孔切削面延伸至前方与后切削面相交形成有扩孔切削刃。
微强化同心麻花钻，涉及用于机械加工的钻孔刀具，包括刀具柄和刀具头，刀具头一体地设置有至少两个螺旋条，在每个螺旋条的朝向切削方向的面形成为螺旋切削面，沿螺旋切削面外边缘向后的面为螺旋副切削面，螺旋切削面与螺旋副切削面相交形成有螺旋切削刃，螺旋条的轴向前端顶面侧的面形成为后切削面，至少两侧的后切削面相交形成有横刃，螺旋切削面与后切削面相交形成有切削刃，螺旋副切削面与后切削面相交形成有侧刃，
本发明是在普通麻花钻上进行对称的同心钻，锋锐的微强化技术的高强度螺旋切削刃的设置，
其特征在于：在所述微强化同心麻花钻轴向中心区域两侧的螺旋切削面上对称的设置立起的微强化中心钻延伸至后切削面并凸出的形成钻中心孔刀具；所述的微强化中心钻的内侧凸起的设置以毫米为单位的微强化中心切削面，所述的微强化中心切削面延伸至轴向前方与后切削面相交形成微强化同心麻花钻的微强化中心钻孔刃；
和一体地在微强化同心麻花钻的两侧，分别沿螺旋切削刃向内侧轴向中心方向的螺旋切削面上凹陷的设置微强化耐磨槽；微强化耐磨槽的底部沿螺旋切削刃形成有具有毫米强度的微强化耐磨切削面，微强化耐磨切削面的内侧立起的设置微强化耐磨台；所述的微强化耐磨切削面延伸至前方与后切削面相交形成有微强化耐磨切削刃。
微强化同心麻花钻，涉及用于机械加工的钻孔刀具，包括刀具柄和刀具头，刀具头一体地设置有至少两个螺旋条，在每个螺旋条的朝向切削方向的面形成为螺旋切削面，沿螺旋切削面外边缘向后的面为螺旋副切削面，螺旋切削面与螺旋副切削面相交形成有螺旋切削刃，螺旋条的轴向前端顶面侧的面形成为后切削面，至少两侧的后切削面相交形成有横刃，螺旋切削面与后切削面相交形成有切削刃，螺旋副切削面与后切削面相交形成有侧刃，
本发明是在普通麻花钻上进行对称的同心钻，锋锐的微强化技术的高强度螺旋切削刃的设置，
其特征在于：在所述微强化同心麻花钻在轴向中心两侧的螺旋切削面的中心区域，对称的设置立起的微强化扩孔钻；所述的微强化扩孔钻的内侧形成凸起的扩孔切削面；所述的扩孔切削面延伸至前方与后切削面相交形成有扩孔切削刃；
和一体地沿螺旋切削刃向内侧轴向中心方向的螺旋切削面上凹陷的设置微强化耐磨槽；微强化耐磨槽的底部沿螺旋切削刃形成有具有毫米强度的微强化耐磨切削面，微强化耐磨切削面的内侧立起的设置微强化耐磨台；所述的微强化耐磨台延伸至前方与后切削面相交形成有微强化耐磨钻；所述的微强化耐磨切削面延伸至前方与后切削面相交形成有微强化耐磨切削刃。
微强化同心麻花钻，涉及用于机械加工的钻孔刀具，包括刀具柄和刀具头，刀具头一体地设置有至少两个螺旋条，在每个螺旋条的朝向切削方向的面形成为螺旋切削面，沿螺旋切削面外边缘向后的面为螺旋副切削面，螺旋切削面与螺旋副切削面相交形成有螺旋切削刃，螺旋条的轴向前端顶面侧的面形成为后切削面，至少两侧的后切削面相交形成有横刃，螺旋切削面与后切削面相交形 成有切削刃，螺旋副切削面与后切削面相交形成有侧刃，
本发明是在普通麻花钻上进行对称的同心钻，锋锐的微强化技术的高强度螺旋切削刃的设置，
其特征在于：在所述微强化同心麻花钻轴向中心区域两侧的螺旋切削面上对称的设置立起的微强化中心钻延伸至后切削面并凸出的形成钻中心孔刀具；所述的微强化中心钻的内侧凸起的设置有微强化中心切削面，所述的微强化中心切削面延伸至轴向前方与后切削面相交形成微强化同心麻花钻的微强化中心钻孔刃；
和一体地在轴向中心两侧的螺旋切削面的中心区域，对称的设置立起的微强化扩孔钻；所述的微强化扩孔钻的内侧形成凸起的扩孔切削面；所述的扩孔切削面延伸至前方与后切削面相交形成有扩孔切削刃；
和一体地沿螺旋切削刃向内侧轴向中心方向的螺旋切削面上凹陷的设置微强化耐磨槽；微强化耐磨槽的底部沿螺旋切削刃形成有具有毫米强度的微强化耐磨切削面，微强化耐磨切削面的内侧立起的设置微强化耐磨台；所述的微强化耐磨台延伸至前方与后切削面相交形成有微强化耐磨钻；所述的微强化耐磨切削面延伸至前方与后切削面相交形成有微强化耐磨切削刃。
优选地，所述的微强化耐磨切削面与螺旋副切削面的夹角小于等于螺旋副切削面与螺旋副切削面的夹角。
优选地，所述的微强化耐磨切削刃与侧刃形成的夹角小于等于螺旋副切削面与侧刃形成的夹角。
优选地，所述的微强化同心麻花钻两侧的后切削面在轴向中心相交形成有横刃，所述的微强化同心麻花钻的横刃的两侧倒角形成有倒角面和减小的横刃；
或所述的微强化同心麻花钻的横刃的两侧倒角形成有倒角面和无横刃的尖刃。
优选地，所述的微强化同心麻花钻的刀具柄和刀具头的螺旋条中设置有冷 却孔。
优选地，所述的微强化同心麻花钻从中心横刃开始以向外侧的侧刃方向的后切削面上高度降低的方式设置至少一级或多级台阶。
优选地，所述的微强化同心麻花钻的切削刃上设置有至少一个或多个凹口刃，
所述的凹口刃向后切削面延伸形成有至少一个或多个凹槽。
优选地，所述微强化同心麻花钻沿轴向中心两侧的螺旋切削面上对称的设置有微强化同心中心钻和微强化同心中心切削面，微强化同心中心切削面沿螺旋切削面延伸至轴向前端与后切削面相交形成有中心孔同心切削刃。
优选地，所述的微强化同心麻花钻两侧的螺旋切削面上分别对称的设置有在中心位置立起的微强化同心扩孔钻和凸起的同心扩孔切削面；所述同心扩孔切削面沿螺旋切削面延伸至轴向前端与后切削面相交形成有同心扩孔切削刃。
优选地，所述的微强化同心麻花钻的两侧螺旋切削面上沿轴向中心对称的设置有沿螺旋切削刃凹陷的微强化同心耐磨槽；
所述微强化同心麻花钻的微强化同心耐磨槽中设置有微强化同心耐磨台和微强化同心耐磨切削面；微强化同心耐磨切削面沿螺旋切削面延伸至轴向前端与后切削面相交形成有微强化同心耐磨切削刃。
优选地，所述微强化同心麻花钻沿轴向中心两侧的螺旋切削面上对称的设置有微强化中心钻和微强化心中心切削面。
优选地，所述微强化同心麻花钻的微强化心中心切削面沿螺旋切削面延伸至轴向前端与后切削面相交形成有中心钻孔刃。
优选地，所述微强化同心麻花钻沿轴向中心两侧的螺旋切削面上对称的设置有微强化同心钻和微强化同心切削面，微强化同心切削面沿螺旋切削面延伸至轴向前端与后切削面相交形成有中心钻孔刃。
优选地，所述的微强化同心麻花钻始终凸出在微强化同心麻花钻的轴向中心区域并形成凸起的钻中心孔刀具。
优选地，所述微强化同心麻花钻的微强化中心钻的微强化同心切削面至螺旋切削面的高度小于等于微强化同心麻花钻直径的十分之一。
优选地，所述的微强化中心钻或微强化同心钻具有减小阻力和提高效率的效果。
优选地，所述的微强化同心麻花钻上沿轴向中心对称的设置有在螺旋切削面的中心区域上立起的微强化心扩孔钻和凸起的同心扩孔切削面。
优选地，所述的微强化同心麻花钻的扩孔切削面沿螺旋切削面延伸至轴向前端与后切削面相交形成有扩孔切削刃。
优选地，所述的微强化同心麻花钻上沿轴向中心对称的设置有在螺旋切削面的中心区域上立起的微强化同心扩孔钻和凸起的同心扩孔切削面；所述同心扩孔切削面沿螺旋切削面延伸至轴向前端与后切削面相交形成有同心扩孔切削刃。
优选地，所述微强化同心麻花钻的微强化扩孔钻至螺旋切削面的高度小于等于微强化同心麻花钻直径的十分之一。
优选地，所述的微强化扩孔钻或微强化扩孔钻具有平衡稳定的效果。
优选地，所述的微强化同心麻花钻的两侧螺旋切削面上沿轴向中心对称的设置有沿螺旋切削刃凹陷的微强化耐磨槽。
优选地，所述微强化同心麻花钻的微强化耐磨槽中设置有微强化耐磨台和微强化耐磨切削面。
优选地，所述的微强化同心麻花钻的微强化耐磨切削面沿螺旋切削面延伸至轴向前端与后切削面相交形成有微强化耐磨切削刃。
优选地，所述微强化同心麻花钻的微强化耐磨切削面与螺旋副切削面的夹 角小于或等于螺旋切削面与螺旋副切削面的夹角。
优选地，所述微强化同心麻花钻的微强化耐磨切削面与螺旋副切削面的夹角小于螺旋切削面与螺旋副切削面的夹角。
优选地，所述微强化同心麻花钻的微强化同心耐磨切削面与螺旋副切削面的夹角等于螺旋切削面与螺旋副切削面的夹角。
优选地，所述微强化同心麻花钻的微强化同心耐磨切削面沿螺旋切削面延伸至轴向前端与后切削面相交形成有微强化同心耐磨切削刃。
优选地，所述的微强化同心麻花钻的两侧螺旋切削面上沿轴向中心对称的设置有沿螺旋切削刃凹陷的微强化同心耐磨槽；
所述微强化同心麻花钻的微强化同心耐磨槽中设置有微强化同心耐磨台和微强化同心耐磨切削面。
优选地，所述的微强化同心麻花钻的微强化同心耐磨切削面沿螺旋切削面延伸至轴向前端与后切削面相交形成有微强化同心耐磨切削刃。
优选地，所述微强化同心麻花钻的微强化同心耐磨台的高度小于等于1毫米。
优选地，所述微强化同心麻花钻的微强化耐磨切削面的宽度小于或等于微强化同心麻花钻直径的六分之一。
优选地，所述微强化同心麻花钻的微强化耐磨切削面与螺旋副切削面的夹角的缩小有利于提高微强化同心麻花钻的的切削效率。
优选地，所述的微强化耐磨槽或微强化同心耐磨槽具有延长使用寿命的效果。
优选地，所述微强化同心麻花钻的微强化中心钻延伸至前端与后切削面相交形成微强化的侧刃。
优选地，所述微强化同心麻花钻的微强化扩孔钻延伸至前端与后切削面相 交形成微强化的侧刃。
优选地，所述微强化同心麻花钻的微强化耐磨台延伸至前端与后切削面相交形成微强化的侧刃。
优选地，所述的微强化同心麻花钻两侧的后切削面在轴向中心相交形成有横刃，所述的微强化同心麻花钻的横刃的两侧倒角形成有倒角面和减小的横刃；
或所述的微强化同心麻花钻的横刃的两侧倒角形成有倒角面和无横刃的尖刃。
优选地，所述的微强化同心麻花钻的刀具柄和刀具头的螺旋条中设置有冷却孔。
优选地，所述的微强化同心麻花钻从中心横刃开始以向外侧的侧刃方向的后切削面上高度降低的方式设置至少一级台阶或多级台阶。
优选地，所述的微强化同心麻花钻的切削刃上设置有至少一个凹口刃或多个凹口刃，
所述的凹口刃向后切削面延伸形成有至少一个凹槽或多个凹槽。
优选地，在所述的微强化同心麻花钻最外侧的切削刃与螺旋副切削刃相交的夹角为锐角或直角，或钝角。
优选地，所述的微强化同心麻花钻轴向中心两侧的螺旋切削面上至少有一组凸起的结构是对称的，并且是在公差范围内的。
有益效果：
在钻床上进行的对比实验中，以直径20毫米的麻花钻为实验，同为M35的含钴高速钢，同时热处理，同批次生产，钻孔对象为锻打调质的齿轮精车加工价，钻孔深度35mm，盲孔，普通结构的麻花钻转速和进刀量达到极限的情况下，微强化同心麻花钻还可以提高转速40％以上，提高进刀量40％以上，综合钻孔效率提高0.96倍以上，钻孔数量微强化同心麻花钻比普通结构的麻花钻多 增加十至三十倍。
附图说明
本发明的技术方案和优点将通过结合附图进行详细的说明，在该附图中：
图1是本发明的第一实施方式的微强化同心麻花钻的俯视剖面示意图。
图2是本发明的第二实施方式的微强化同心麻花钻的俯视剖面示意图。
图3是本发明的第二实施方式的微强化同心麻花钻的局部结构示意图。
图4是本发明的第三实施方式的微强化同心麻花钻的俯视剖面示意图。
图5是本发明的第四实施方式的微强化同心麻花钻的俯视剖面示意图。
具体实施方式
下面将结合附图详细地说明本发明的微强化同心麻花钻的优选实施方式，在实施方式1-7中主要以具有两个螺旋条的刀具为例进行说明。
实施方式1：
如图1所示，本发明的第一实施方式的微强化同心麻花钻，涉及用于机械加工的钻孔刀具，包括刀具柄(未示出)和刀具头，刀具头一体地设置有至少两个螺旋条B，在每个螺旋条B的朝向切削方向的面形成为螺旋切削面5，螺旋切削面5边缘外侧后面侧的面为螺旋副切削面7，螺旋切削面5与螺旋副切削面7相交形成有螺旋切削刃6，螺旋切削面5的轴向前端背面侧的面形成为后切削面8，至少两侧的后切削面8相交形成有横刃A，螺旋切削面5与后切削面8相交形成有切削刃10，螺旋副切削面7与后切削面8相交形成有侧刃11，
本发明是在普通麻花钻上进行对称的同心钻和微强化技术的设置，
在所述微强化同心麻花钻轴向中心O区域两侧的螺旋切削面5上对称的设置立起的微强化中心钻2；所述的微强化中心钻2始终凸出在微强化同心麻花钻的轴向中心区域并形成凸出的钻中心孔刀具13；所述的微强化中心钻的内侧凸 起的设置以毫米为单位的微强化中心切削面1，所述的微强化中心切削面1延伸至轴向前方与后切削面相交形成微强化同心麻花钻的微强化中心钻孔刃14；
和一体地在微强化同心麻花钻上在两侧沿轴向中心O方向螺旋延伸的螺旋切削面5的中心区域，对称的设置立起的微强化扩孔钻12；所述的微强化扩孔钻12的内侧形成凸起的扩孔切削面3；所述的扩孔切削面3延伸至前方与后切削面8相交形成有扩孔切削刃9。
所述微强化同心麻花钻沿轴向中心两侧的螺旋切削面5上对称的设置微强化同心中心钻13和微强化同心中心切削面1。
所述微强化同心麻花钻的微强化同心中心切削面1沿螺旋切削面延伸至轴向前端与后切削面8相交形成有中心孔切削刃14。
所述的微强化同心麻花钻始终凸出在微强化同心麻花钻的轴向中心区域并形成凸起的钻中心孔刀具。
所述微强化同心麻花钻的微强化中心钻的微强化同心中心切削面1至螺旋切削面5的高度小于等于微强化同心麻花钻直径的十分之一。
所述的微强化中心钻13或微强化同心中心钻13具有减小阻力和提高效率的效果。
所述的微强化同心麻花钻上沿轴向中心对称的设置有在螺旋切削面5的中心区域上立起的微强化同心扩孔钻12和凸起的同心扩孔切削面3。
所述的微强化同心麻花钻的同心扩孔切削面3沿螺旋切削面5延伸至轴向前端与后切削面8相交形成有扩孔切削刃9。
所述微强化同心麻花钻的微强化同心扩孔钻12至螺旋切削面的高度小于等于微强化同心麻花钻直径的十分之一。
所述的微强化扩孔钻或微强化同心扩孔钻12具有平衡稳定的效果。
由于沿轴向中心两侧的螺旋切削面5上设置了对称的微强化中心钻2和内 侧凸起的微强化中心切削面1，微强化耐磨槽21中设置有微强化耐磨台15和微强化耐磨切削面16，因此有效的保持了微强化同心麻花钻的稳定性，减少了微强化同心麻花钻切削刃的磨损，有利于持续保持刀具切削刃的锋利，提高切削效率。
在钻床上进行的对比实验中，以直径10.5的微强化同心麻花钻为实验，同为M35的含钴高速钢，同时热处理，同批次生产，钻孔对象为锻打调质的齿轮精车加工价，钻孔深度35mm，盲孔，微强化同心麻花钻的螺旋分孔切削面24宽2.5mm，螺旋分孔台23高0.8mm，在普通结构的微强化同心麻花钻转速和进刀量达到极限的情况下，微强化同心麻花钻还可以提高转速40％，提高进刀量40％，综合钻孔效率提高0.96倍，普通结构的微强化同心麻花钻钻孔312个，微强化同心麻花钻钻孔4376个，钻孔数量比微强化同心麻花钻比普通结构的微强化同心麻花钻多增加十四倍多。
实施方式2：
如图2，图3所示，本发明的第二实施方式的微强化同心麻花钻，本发明的实施方式实在第一实施方式的基础上进行综合运用，涉及用于机械加工的钻孔刀具，包括刀具柄(未示出)和刀具头，刀具头一体地设置有至少两个螺旋条B，在每个螺旋条B的朝向切削方向的面形成为螺旋切削面5，螺旋切削面5边缘外侧后面侧的面为螺旋副切削面7，螺旋切削面5与螺旋副切削面7相交形成有螺旋切削刃6，螺旋切削面5的轴向前端背面侧的面形成为后切削面8，至少两侧的后切削面8相交形成有横刃A，螺旋切削面5与后切削面8相交形成有切削刃10，螺旋副切削面7与后切削面8相交形成有侧刃11，
本发明是在普通麻花钻上进行对称的同心钻，锋锐的微强化技术的高强度螺旋切削刃的设置，
在所述微强化同心麻花钻轴向中心O区域两侧的螺旋切削面5上对称的设置立起的微强化中心钻2；所述的微强化中心钻2始终凸出在微强化同心麻花钻的轴向中心区域并形成凸出的钻中心孔刀具13；所述的微强化中心钻的内侧凸起的设置以毫米为单位的微强化中心切削面1，所述的微强化中心切削面1延伸 至轴向前方与后切削面相交形成微强化同心麻花钻的微强化中心钻孔刃14；
和一体地在微强化同心麻花钻的两侧，分别沿螺旋切削刃6向内侧轴向中心O方向的螺旋切削面5上凹陷的设置微强化耐磨槽16；微强化耐磨槽16的底部沿螺旋切削刃6形成有具有毫米强度的微强化耐磨切削面17，微强化耐磨切削面17的内侧立起的设置微强化耐磨台15；所述的微强化耐磨切削面17延伸至前方与后切削面相8交形成有微强化耐磨切削刃18。
所述微强化同心麻花钻沿轴向中心两侧的螺旋切削面5上对称的设置微强化同心中心钻13和微强化同心中心切削面1。
所述微强化同心麻花钻的微强化同心中心切削面1沿螺旋切削面延伸至轴向前端与后切削面8相交形成有中心孔切削刃14。
所述微强化同心麻花钻的微强化中心钻13的微强化同心中心切削面1至螺旋切削面5的高度小于等于微强化同心麻花钻直径的十分之一。
所述的微强化中心钻13或微强化同心中心钻13具有减小阻力和提高效率的效果。
所述的微强化同心麻花钻的两侧螺旋切削面5上沿轴向中心对称的设置有沿螺旋切削刃6凹陷的微强化同心耐磨槽16。
所述微强化同心麻花钻的微强化同心耐磨槽16中设置有微强化同心耐磨台15和微强化同心耐磨切削面17。
所述微强化同心麻花钻的微强化耐磨切削面17与螺旋副切削面7的夹角α2等于螺旋切削面5与螺旋副切削面7的夹角α1。
所述微强化同心麻花钻的微强化耐磨切削面17与螺旋副切削面7的夹角α2小于螺旋切削面5与螺旋副切削面7的夹角α1。
所述的微强化同心麻花钻的微强化同心耐磨切削面17沿螺旋切削面5延伸至轴向前端与后切削面8相交形成有微强化同心耐磨切削刃18。
所述的微强化耐磨槽16或微强化同心耐磨槽16具有延长使用寿命的效果。
所述微强化同心麻花钻上的沿轴向中心两侧的螺旋切削面5上对称的设置微强化耐磨切削面17。
所述微强化同心麻花钻的微强化同心耐磨台15的高度小于等于1毫米。
所述微强化同心麻花钻的微强化耐磨切削面17的宽度小于或等于微强化同心麻花钻直径的六分之一。
通过上述设置相当于在钻孔过程中先打了工艺孔再进行钻削，由于是在同一刀具上的设置因此有很高的稳定性，相比普通扩孔钻具有更加稳定的优势，因此具备高效率的优势钻孔精度也更高。
由于微强化同心麻花钻的微强化耐磨切削面16与螺旋副切削面5的夹角α2小于螺旋切削面3与螺旋副切削面5的夹角α1，因此设置有微强化耐磨槽21或微强化同心耐磨槽21的微强化同心麻花钻阻力小，切削效率更高。
由于沿轴向中心两侧的螺旋切削面3上设置了对称的微强化中心钻2和内侧凸起的微强化中心切削面1，微强化耐磨槽21中设置有微强化耐磨台15和微强化耐磨切削面16，因此有效的保持了微强化同心麻花钻的稳定性，减少了微强化同心麻花钻切削刃的磨损，有利于持续保持刀具切削刃的锋利，提高切削效率。
在钻床上进行的对比实验中，以直径10.0的微强化同心麻花钻为实验，同为M35的含钴高速钢，同时热处理，同批次生产，钻孔对象为锻打调质的齿轮精车加工价，钻孔深度35mm，盲孔，微强化同心麻花钻的螺旋切削面13宽3.5mm，螺旋阶梯中心台10高0.6mm，在普通结构的微强化同心麻花钻转速和进刀量达到极限的情况下，微强化同心麻花钻还可以提高转速40％，提高进刀量40％，综合钻孔效率提高0.96倍，普通结构的微强化同心麻花钻钻孔312个，微强化同心麻花钻钻孔3798个，钻孔数量比微强化同心麻花钻比普通结构的微强化同心麻花钻多增加十二倍多。
根据上述实验结果微强化同心麻花钻的使用效率很高但是使用寿命明显不 如外侧设置扩孔切削面13和微强化扩孔钻14的效果更好，但是该种结构比普通微强化同心麻花钻还是有延长使用寿命和提高效率的效果。
实施方式3：
如图3所示，本发明的第三实施方式的微强化同心麻花钻，本发明的实施方式实在第一至第二实施方式的基础上进行综合运用，涉及用于机械加工的钻孔刀具，包括刀具柄(未示出)和刀具头，刀具头一体地设置有至少两个螺旋条B，在每个螺旋条B的朝向切削方向的面形成为螺旋切削面5，螺旋切削面5边缘外侧后面侧的面为螺旋副切削面7，螺旋切削面5与螺旋副切削面7相交形成有螺旋切削刃6，螺旋切削面5的轴向前端背面侧的面形成为后切削面8，至少两侧的后切削面8相交形成有横刃A，螺旋切削面5与后切削面8相交形成有切削刃10，螺旋副切削面7与后切削面8相交形成有侧刃11，
本发明是在普通麻花钻上进行对称的同心钻，锋锐的微强化技术的高强度螺旋切削刃的设置，
在微强化同心麻花钻上在两侧沿轴向中心O方向螺旋延伸的螺旋切削面5的中心区域，对称的设置立起的微强化扩孔钻12；所述的微强化扩孔钻12的内侧形成凸起的扩孔切削面3；所述的扩孔切削面3延伸至前方与后切削面8相交形成有扩孔切削刃9；
和一体地在微强化同心麻花钻的两侧，分别沿螺旋切削刃6向内侧轴向中心O方向的螺旋切削面5上凹陷的设置微强化耐磨槽16；微强化耐磨槽16的底部沿螺旋切削刃6形成有具有毫米强度的微强化耐磨切削面17，微强化耐磨切削面17的内侧立起的设置微强化耐磨台15；所述的微强化耐磨切削面17延伸至前方与后切削面相8交形成有微强化耐磨切削刃18。
所述的微强化同心麻花钻上沿轴向中心对称的设置有在螺旋切削面的中心区域上立起的微强化同心扩孔钻和凸起的同心扩孔切削面。
所述的微强化同心麻花钻的同心扩孔切削面沿螺旋切削面延伸至轴向前端与后切削面相交形成有扩孔切削刃。
所述微强化同心麻花钻的微强化同心扩孔钻至螺旋切削面的高度小于等于微强化同心麻花钻直径的十分之一。
所述的微强化扩孔钻或微强化同心扩孔钻具有平衡稳定的效果。
所述的微强化同心麻花钻的两侧螺旋切削面上沿轴向中心对称的设置有沿螺旋切削刃凹陷的微强化同心耐磨槽。
所述微强化同心麻花钻的微强化同心耐磨槽中设置有微强化同心耐磨台和微强化同心耐磨切削面。
所述微强化同心麻花钻的微强化耐磨切削面与螺旋副切削面的夹角小于或等于螺旋切削面与螺旋副切削面的夹角。
所述微强化同心麻花钻的微强化耐磨切削面与螺旋副切削面的夹角小于螺旋切削面与螺旋副切削面的夹角。
所述微强化同心麻花钻的微强化同心耐磨切削面与螺旋副切削面的夹角等于螺旋切削面与螺旋副切削面的夹角。
所述的微强化同心麻花钻的微强化同心耐磨切削面沿螺旋切削面延伸至轴向前端与后切削面相交形成有微强化同心耐磨切削刃。
所述的微强化耐磨槽或微强化同心耐磨槽具有延长使用寿命的效果。
所述微强化同心麻花钻上的沿轴向中心两侧的螺旋切削面上对称的设置微强化耐磨切削面。
所述微强化同心麻花钻的微强化同心耐磨台的高度小于等于1毫米。
所述微强化同心麻花钻的微强化耐磨切削面的宽度小于或等于微强化同心麻花钻直径的六分之一。
由于微强化同心麻花钻的微强化耐磨切削面16与螺旋副切削面5的夹角α2小于螺旋切削面3与螺旋副切削面5的夹角α1，因此设置有微强化耐磨槽21或微强化同心耐磨槽21的微强化同心麻花钻阻力小，切削效率更高。
由于沿轴向中心两侧的螺旋切削面3上设置了对称的微强化中心钻2和内侧凸起的微强化中心切削面1，微强化耐磨槽21中设置有微强化耐磨台15和微强化耐磨切削面16，因此有效的保持了微强化同心麻花钻的稳定性，减少了微强化同心麻花钻切削刃的磨损，有利于持续保持刀具切削刃的锋利，提高切削效率。
通过在微强化同心麻花钻两侧的后切削面相交形成有横刃A，或在横刃A的两端倒角形成有倒角面(未示出)，形成有倒角刃(未示出)原横刃A倒角后形成为缩小的横刃A或无横刃A的尖刃(未示出)，由于横刃的减小或消除极大地降低了由于横刃过长所产生的巨大阻力。
根据上述结构，由于钻孔切削是圆周运动，在圆周运动的过程中产生了离心力，造成了螺旋切削刃16的快速磨损，微强化耐磨槽9中微强化耐磨台6和微强化耐磨切削面7的受力转移至内侧的螺旋切削刃和螺旋切削面上，同时微强化耐磨切削面7延伸至前方与后切削面相交形成的微强化耐磨切削刃18具有的高强度和耐磨损效果持续的保持切削刃的锋利，减小了整体切削阻力，降低刀具头1温度，分解刀具最易损坏的外端的切削刃的受力，使刀具使用寿命延长，并在加工过程中一直保持高强度。
在钻床上进行的对比实验中，以直径10.5的微强化同心麻花钻为实验，同为M35的含钴高速钢，同时热处理，同批次生产，钻孔对象为锻打调质的齿轮精车加工价，钻孔深度35mm，盲孔，微强化同心麻花钻的螺旋微切面1817宽1.5mm，微强化耐磨台2016高0.6mm，在普通结构的微强化同心麻花钻转速和进刀量达到极限的情况下，微强化同心麻花钻还可以提高转速40％，提高进刀量40％，综合钻孔效率提高0.96倍，普通结构的微强化同心麻花钻钻孔312个，微强化同心麻花钻钻孔5308个，钻孔数量微强化同心麻花钻比普通结构的微强化同心麻花钻多增加十六倍多。
实施方式4：
如图4所示，本发明的第四实施方式的微强化同心麻花钻，本发明的实施方式实在第一至第三实施方式的基础上进行综合运用，涉及用于机械加工的钻 孔刀具，包括刀具柄(未示出)和刀具头，刀具头一体地设置有至少两个螺旋条B，在每个螺旋条B的朝向切削方向的面形成为螺旋切削面5，螺旋切削面5边缘外侧后面侧的面为螺旋副切削面7，螺旋切削面5与螺旋副切削面7相交形成有螺旋切削刃6，螺旋切削面5的轴向前端背面侧的面形成为后切削面8，至少两侧的后切削面8相交形成有横刃A，螺旋切削面5与后切削面8相交形成有切削刃10，螺旋副切削面7与后切削面8相交形成有侧刃11，
本发明是在普通麻花钻上进行对称的同心钻，锋锐的微强化技术的高强度螺旋切削刃的设置，
在所述微强化同心麻花钻轴向中心O区域两侧的螺旋切削面5上对称的设置立起的微强化中心钻2；所述的微强化中心钻2始终凸出在微强化同心麻花钻的轴向中心区域并形成凸出的钻中心孔刀具13；所述的微强化中心钻的内侧凸起的设置以毫米为单位的微强化中心切削面1，所述的微强化中心切削面1延伸至轴向前方与后切削面相交形成微强化同心麻花钻的微强化中心钻孔刃14；
和一体地在微强化同心麻花钻上在两侧沿轴向中心O方向螺旋延伸的螺旋切削面5的中心区域，对称的设置立起的微强化扩孔钻12；所述的微强化扩孔钻12的内侧形成凸起的扩孔切削面3；所述的扩孔切削面3延伸至前方与后切削面8相交形成有扩孔切削刃9；
和一体地在微强化同心麻花钻的两侧，分别沿螺旋切削刃6向内侧轴向中心O方向的螺旋切削面5上凹陷的设置微强化耐磨槽16；微强化耐磨槽16的底部沿螺旋切削刃6形成有具有毫米强度的微强化耐磨切削面17，微强化耐磨切削面17的内侧立起的设置微强化耐磨台15；所述的微强化耐磨切削面17延伸至前方与后切削面相8交形成有微强化耐磨切削刃18。
由于微强化同心麻花钻的微强化耐磨切削面16与螺旋副切削面7的夹角α2小于螺旋切削面5与螺旋副切削面7的夹角α1，因此设置有微强化耐磨槽21或微强化同心耐磨槽21的微强化同心麻花钻阻力小，切削效率更高。
由于沿轴向中心两侧的螺旋切削面5上设置了对称的微强化中心钻2和内侧凸起的微强化中心切削面1，微强化耐磨槽21中设置有微强化耐磨台15和微 强化耐磨切削面16，因此有效的保持了微强化同心麻花钻的稳定性，减少了微强化同心麻花钻切削刃的磨损，有利于持续保持刀具切削刃的锋利，提高切削效率。
在钻床上进行的对比实验中，以直径10.5的微强化同心麻花钻为实验，同为M35的含钴高速钢，同时热处理，同批次生产，钻孔对象为锻打调质的齿轮精车加工价，钻孔深度35mm，盲孔，微强化同心麻花钻的螺旋分孔切削面3宽2.5mm，螺旋分孔台12高0.8mm，在普通结构的微强化同心麻花钻转速和进刀量达到极限的情况下，微强化同心麻花钻还可以提高转速40％，提高进刀量40％，综合钻孔效率提高0.96倍，普通结构的微强化同心麻花钻钻孔312个，微强化同心麻花钻钻孔3376个，钻孔数量比微强化同心麻花钻比普通结构的微强化同心麻花钻多增加十倍多。
在第一至第四实施方式的基础上进行综合选择性运用两侧的后切削面相交形成的横刃A上，两端倒角形成有倒角面和倒角刃，原横刃A倒角后形成为缩小的横刃A或无横刃A的尖刃A，由于横刃的减小或消除极大地降低了由于横刃过长所产生的巨大阻力。
实施方式五
参考图1，本发明的第五实施方式的微强化同心麻花钻，本发明的第五实施方式的微强化同心麻花钻，涉及用于机械加工的钻孔刀具，包括刀具柄(未示出)和刀具头，刀具头一体地设置有至少两个螺旋条B，在每个螺旋条B的朝向切削方向的面形成为螺旋切削面5，螺旋切削面5边缘外侧后面侧的面为螺旋副切削面7，螺旋切削面5与螺旋副切削面7相交形成有螺旋切削刃6，螺旋切削面5的轴向前端背面侧的面形成为后切削面8，至少两侧的后切削面8相交形成有横刃A，螺旋切削面5与后切削面8相交形成有切削刃10，螺旋副切削面7与后切削面8相交形成有侧刃11，
本发明是在普通麻花钻上进行对称的同心钻和微强化技术的设置，
在所述微强化同心麻花钻轴向中心O区域两侧的螺旋切削面5上对称的设置立起的微强化中心钻2；所述的微强化中心钻2始终凸出在微强化同心麻花钻 的轴向中心区域并形成凸出的钻中心孔刀具13；所述的微强化中心钻的内侧凸起的设置以毫米为单位的微强化中心切削面1，所述的微强化中心切削面1延伸至轴向前方与后切削面相交形成微强化同心麻花钻的微强化中心钻孔刃14。
所述微强化同心麻花钻沿轴向中心两侧的螺旋切削面5上对称的设置微强化同心中心钻13和微强化同心中心切削面1。
所述微强化同心麻花钻的微强化同心中心切削面1沿螺旋切削面延伸至轴向前端与后切削面8相交形成有中心孔切削刃14。
所述的微强化同心麻花钻始终凸出在微强化同心麻花钻的轴向中心区域并形成凸起的钻中心孔刀具。
所述微强化同心麻花钻的微强化中心钻的微强化同心中心切削面1至螺旋切削面5的高度小于等于微强化同心麻花钻直径的十分之一。
所述的微强化中心钻13或微强化同心中心钻13具有减小阻力和提高效率的效果。
所述的微强化同心麻花钻的同心扩孔切削面3沿螺旋切削面5延伸至轴向前端与后切削面8相交形成有扩孔切削刃9。
由于沿轴向中心两侧的螺旋切削面5上设置了对称的微强化中心钻2和内侧凸起的微强化中心切削面1，微强化耐磨槽21中设置有微强化耐磨台15和微强化耐磨切削面16，因此有效的保持了微强化同心麻花钻的稳定性，减少了微强化同心麻花钻切削刃的磨损，有利于持续保持刀具切削刃的锋利，提高切削效率。
实施方式六
参考图1，本发明的第六实施方式的微强化同心麻花钻，涉及用于机械加工的钻孔刀具，包括刀具柄(未示出)和刀具头，刀具头一体地设置有至少两个螺旋条B，在每个螺旋条B的朝向切削方向的面形成为螺旋切削面5，螺旋切削面5边缘外侧后面侧的面为螺旋副切削面7，螺旋切削面5与螺旋副切削面7相交形 成有螺旋切削刃6，螺旋切削面5的轴向前端背面侧的面形成为后切削面8，至少两侧的后切削面8相交形成有横刃A，螺旋切削面5与后切削面8相交形成有切削刃10，螺旋副切削面7与后切削面8相交形成有侧刃11，
本发明是在普通麻花钻上进行对称的同心钻和微强化技术的设置，
和一体地在微强化同心麻花钻上在两侧沿轴向中心O方向螺旋延伸的螺旋切削面5的中心区域，对称的设置立起的微强化扩孔钻12；所述的微强化扩孔钻12的内侧形成凸起的扩孔切削面3；所述的扩孔切削面3延伸至前方与后切削面8相交形成有扩孔切削刃9。
所述的微强化同心麻花钻始终凸出在微强化同心麻花钻的轴向中心区域并形成凸起的钻中心孔刀具。
所述的微强化同心麻花钻上沿轴向中心对称的设置有在螺旋切削面5的中心区域上立起的微强化同心扩孔钻12和凸起的同心扩孔切削面3。
所述的微强化同心麻花钻的同心扩孔切削面3沿螺旋切削面5延伸至轴向前端与后切削面8相交形成有扩孔切削刃9。
所述微强化同心麻花钻的微强化同心扩孔钻12至螺旋切削面的高度小于等于微强化同心麻花钻直径的十分之一。
所述的微强化扩孔钻或微强化同心扩孔钻12具有平衡稳定的效果。
由于沿轴向中心两侧的螺旋切削面5上设置了对称的微强化中心钻2和内侧凸起的微强化中心切削面1，微强化耐磨槽21中设置有微强化耐磨台15和微强化耐磨切削面16，因此有效的保持了微强化同心麻花钻的稳定性，减少了微强化同心麻花钻切削刃的磨损，有利于持续保持刀具切削刃的锋利，提高切削效率。
实施方式七
参考图2，本发明的第七实施方式的微强化同心麻花钻，本发明的实施方式实在第一实施方式的基础上进行综合运用，涉及用于机械加工的钻孔刀具，包 括刀具柄(未示出)和刀具头，刀具头一体地设置有至少两个螺旋条B，在每个螺旋条B的朝向切削方向的面形成为螺旋切削面5，螺旋切削面5边缘外侧后面侧的面为螺旋副切削面7，螺旋切削面5与螺旋副切削面7相交形成有螺旋切削刃6，螺旋切削面5的轴向前端背面侧的面形成为后切削面8，至少两侧的后切削面8相交形成有横刃A，螺旋切削面5与后切削面8相交形成有切削刃10，螺旋副切削面7与后切削面8相交形成有侧刃11，
本发明是在普通麻花钻上进行对称的同心钻，锋锐的微强化技术的高强度螺旋切削刃的设置，
和一体地在微强化同心麻花钻的两侧，分别沿螺旋切削刃6向内侧轴向中心O方向的螺旋切削面5上凹陷的设置微强化耐磨槽16；微强化耐磨槽16的底部沿螺旋切削刃6形成有具有毫米强度的微强化耐磨切削面17，微强化耐磨切削面17的内侧立起的设置微强化耐磨台15；所述的微强化耐磨切削面17延伸至前方与后切削面相8交形成有微强化耐磨切削刃18。
所述的微强化同心麻花钻的两侧螺旋切削面5上沿轴向中心对称的设置有沿螺旋切削刃6凹陷的微强化同心耐磨槽16。
所述微强化同心麻花钻的微强化同心耐磨槽16中设置有微强化同心耐磨台15和微强化同心耐磨切削面17。
所述微强化同心麻花钻的微强化耐磨切削面17与螺旋副切削面7的夹角α2等于螺旋切削面5与螺旋副切削面7的夹角α1。
所述微强化同心麻花钻的微强化耐磨切削面17与螺旋副切削面7的夹角α2小于螺旋切削面5与螺旋副切削面7的夹角α1。
所述的微强化同心麻花钻的微强化同心耐磨切削面17沿螺旋切削面5延伸至轴向前端与后切削面8相交形成有微强化同心耐磨切削刃18。
所述的微强化耐磨槽16或微强化同心耐磨槽16具有延长使用寿命的效果。
所述微强化同心麻花钻上的沿轴向中心两侧的螺旋切削面5上对称的设置 微强化耐磨切削面17。
所述微强化同心麻花钻的微强化同心耐磨台15的高度小于等于1毫米。
所述微强化同心麻花钻的微强化耐磨切削面17的宽度小于或等于微强化同心麻花钻直径的六分之一。
通过上述设置相当于在钻孔过程中先打了工艺孔再进行钻削，由于是在同一刀具上的设置因此有很高的稳定性，相比普通扩孔钻具有更加稳定的优势，因此具备高效率的优势钻孔精度也更高。
由于微强化同心麻花钻的微强化耐磨切削面16与螺旋副切削面5的夹角α2小于螺旋切削面3与螺旋副切削面5的夹角α1，因此设置有微强化耐磨槽21或微强化同心耐磨槽21的微强化同心麻花钻阻力小，切削效率更高。
以上虽然以具有两个螺旋条B的刀具为例进行了说明，但是本发明的刀具也可具有多个螺旋条B，在各螺旋条B上可以采用如所述实施方式的结构及其其它多种形式的组合。
以上所述的优选实施方式是说明性的而不是限制性的，在不脱离本发明的主旨和基本特征的情况下，本发明还可以以其他方式进行实施和具体化，本发明的范围由权利要求进行限定，在权利要求限定范围内的所有变形都落入本发明的范围内。

Claims (13)

  1. 微强化同心麻花钻，涉及用于机械加工的钻孔刀具，包括刀具柄和刀具头，刀具头一体地设置有至少两个螺旋条，在每个螺旋条的朝向切削方向的面形成为螺旋切削面，沿螺旋切削面外边缘向后的面为螺旋副切削面，螺旋切削面与螺旋副切削面相交形成有螺旋切削刃，螺旋条的轴向前端顶面侧的面形成为后切削面，至少两侧的后切削面相交形成有横刃，螺旋切削面与后切削面相交形成有切削刃，螺旋副切削面与后切削面相交形成有侧刃，
    本发明是在普通麻花钻上进行对称的同心钻和微强化技术的设置，
    其特征在于：在所述微强化同心麻花钻轴向中心区域两侧的螺旋切削面上对称的设置立起的微强化中心钻延伸至后切削面并凸出的形成钻中心孔刀具；所述的微强化中心钻的内侧凸起的设置有微强化中心切削面，所述的微强化中心切削面延伸至轴向前方与后切削面相交形成微强化同心麻花钻的微强化中心钻孔刃；
    和一体地在轴向中心两侧的螺旋切削面的中心区域，对称的设置立起的微强化扩孔钻；所述的微强化扩孔钻的内侧形成凸起的扩孔切削面；所述的扩孔切削面延伸至前方与后切削面相交形成有扩孔切削刃。
  2. 微强化同心麻花钻，涉及用于机械加工的钻孔刀具，包括刀具柄和刀具头，刀具头一体地设置有至少两个螺旋条，在每个螺旋条的朝向切削方向的面形成为螺旋切削面，沿螺旋切削面外边缘向后的面为螺旋副切削面，螺旋切削面与螺旋副切削面相交形成有螺旋切削刃，螺旋条的轴向前端顶面侧的面形成为后切削面，至少两侧的后切削面相交形成有横刃，螺旋切削面与后切削面相交形成有切削刃，螺旋副切削面与后切削面相交形成有侧刃，
    本发明是在普通麻花钻上进行对称的同心钻，锋锐的微强化技术的高强度螺旋切削刃的设置，
    其特征在于：在所述微强化同心麻花钻轴向中心区域两侧的螺旋切削面上对称的设置立起的微强化中心钻延伸至后切削面并凸出的形成钻中心孔刀具； 所述的微强化中心钻的内侧凸起的设置以毫米为单位的微强化中心切削面，所述的微强化中心切削面延伸至轴向前方与后切削面相交形成微强化同心麻花钻的微强化中心钻孔刃；
    和一体地在微强化同心麻花钻的两侧，分别沿螺旋切削刃向内侧轴向中心方向的螺旋切削面上凹陷的设置微强化耐磨槽；微强化耐磨槽的底部沿螺旋切削刃形成有具有毫米强度的微强化耐磨切削面，微强化耐磨切削面的内侧立起的设置微强化耐磨台；所述的微强化耐磨切削面延伸至前方与后切削面相交形成有微强化耐磨切削刃。
  3. 微强化同心麻花钻，涉及用于机械加工的钻孔刀具，包括刀具柄和刀具头，刀具头一体地设置有至少两个螺旋条，在每个螺旋条的朝向切削方向的面形成为螺旋切削面，沿螺旋切削面外边缘向后的面为螺旋副切削面，螺旋切削面与螺旋副切削面相交形成有螺旋切削刃，螺旋条的轴向前端顶面侧的面形成为后切削面，至少两侧的后切削面相交形成有横刃，螺旋切削面与后切削面相交形成有切削刃，螺旋副切削面与后切削面相交形成有侧刃，
    其特征在于：在所述微强化同心麻花钻在轴向中心两侧的螺旋切削面的中心区域，对称的设置立起的微强化扩孔钻；所述的微强化扩孔钻的内侧形成凸起的扩孔切削面；所述的扩孔切削面延伸至前方与后切削面相交形成有扩孔切削刃；
    和一体地沿螺旋切削刃向内侧轴向中心方向的螺旋切削面上凹陷的设置微强化耐磨槽；微强化耐磨槽的底部沿螺旋切削刃形成有具有毫米强度的微强化耐磨切削面，微强化耐磨切削面的内侧立起的设置微强化耐磨台；所述的微强化耐磨台延伸至前方与后切削面相交形成有微强化耐磨钻；所述的微强化耐磨切削面延伸至前方与后切削面相交形成有微强化耐磨切削刃。
  4. 微强化同心麻花钻，涉及用于机械加工的钻孔刀具，包括刀具柄和刀具头，刀具头一体地设置有至少两个螺旋条，在每个螺旋条的朝向切削方向的面形成为螺旋切削面，沿螺旋切削面外边缘向后的面为螺旋副切削面，螺旋切削面与螺旋副切削面相交形成有螺旋切削刃，螺旋条的轴向前端顶面侧的面形成 为后切削面，至少两侧的后切削面相交形成有横刃，螺旋切削面与后切削面相交形成有切削刃，螺旋副切削面与后切削面相交形成有侧刃，
    和一体地在轴向中心两侧的螺旋切削面的中心区域，对称的设置立起的微强化扩孔钻；所述的微强化扩孔钻的内侧形成凸起的扩孔切削面；所述的扩孔切削面延伸至前方与后切削面相交形成有扩孔切削刃；
  5. 微强化同心麻花钻，涉及用于机械加工的钻孔刀具，包括刀具柄和刀具头，刀具头一体地设置有至少两个螺旋条，在每个螺旋条的朝向切削方向的面形成为螺旋切削面，沿螺旋切削面外边缘向后的面为螺旋副切削面，螺旋切削面与螺旋副切削面相交形成有螺旋切削刃，螺旋条的轴向前端顶面侧的面形成为后切削面，至少两侧的后切削面相交形成有横刃，螺旋切削面与后切削面相交形成有切削刃，螺旋副切削面与后切削面相交形成有侧刃，
    本发明是在普通麻花钻上进行对称的同心钻和微强化技术的设置，
    其特征在于：在所述微强化同心麻花钻轴向中心区域两侧的螺旋切削面上对称的设置立起的微强化中心钻延伸至后切削面并凸出的形成钻中心孔刀具；所述的微强化中心钻的内侧凸起的设置有微强化中心切削面，所述的微强化中心切削面延伸至轴向前方与后切削面相交形成微强化同心麻花钻的微强化中心钻孔刃。
  6. 微强化同心麻花钻，涉及用于机械加工的钻孔刀具，包括刀具柄和刀具头，刀具头一体地设置有至少两个螺旋条，在每个螺旋条的朝向切削方向的面形成为螺旋切削面，沿螺旋切削面外边缘向后的面为螺旋副切削面，螺旋切削面与螺旋副切削面相交形成有螺旋切削刃，螺旋条的轴向前端顶面侧的面形成为后切削面，至少两侧的后切削面相交形成有横刃，螺旋切削面与后切削面相交形成有切削刃，螺旋副切削面与后切削面相交形成有侧刃，
    本发明是在普通麻花钻上进行对称的同心钻和微强化技术的设置，
    其特征在于：一体地在轴向中心两侧的螺旋切削面的中心区域，对称的设置立起的微强化扩孔钻；所述的微强化扩孔钻的内侧形成凸起的扩孔切削面； 所述的扩孔切削面延伸至前方与后切削面相交形成有扩孔切削刃。
  7. 微强化同心麻花钻，涉及用于机械加工的钻孔刀具，包括刀具柄和刀具头，刀具头一体地设置有至少两个螺旋条，在每个螺旋条的朝向切削方向的面形成为螺旋切削面，沿螺旋切削面外边缘向后的面为螺旋副切削面，螺旋切削面与螺旋副切削面相交形成有螺旋切削刃，螺旋条的轴向前端顶面侧的面形成为后切削面，至少两侧的后切削面相交形成有横刃，螺旋切削面与后切削面相交形成有切削刃，螺旋副切削面与后切削面相交形成有侧刃，
    本发明是在普通麻花钻上进行对称的同心钻，锋锐的微强化技术的高强度螺旋切削刃的设置，
    其特征在于：一体地在微强化同心麻花钻的两侧，分别沿螺旋切削刃向内侧轴向中心方向的螺旋切削面上凹陷的设置微强化耐磨槽；微强化耐磨槽的底部沿螺旋切削刃形成有具有毫米强度的微强化耐磨切削面，微强化耐磨切削面的内侧立起的设置微强化耐磨台；所述的微强化耐磨切削面延伸至前方与后切削面相交形成有微强化耐磨切削刃。
  8. 如权利要求2-4任一所述的微强化同心麻花钻，
    其特征在于：所述的微强化耐磨切削面与螺旋副切削面的夹角小于螺旋切削面与螺旋副切削面的夹角；
    或所述的微强化耐磨切削面与螺旋副切削面与侧刃形成的夹角等于螺旋切削面与螺旋副切削面形成的夹角。
  9. 如权利要求1-4任一所述的微强化同心麻花钻，
    其特征在于：所述的微强化同心麻花钻两侧的后切削面在轴向中心相交形成有横刃，所述的微强化同心麻花钻的横刃的两侧倒角形成有倒角面和减小的横刃；
    或所述的微强化同心麻花钻的横刃的两侧倒角形成有倒角面和无横刃的尖刃。
  10. 如权利要求1-4任一所述的微强化同心麻花钻，
    其特征在于：所述的微强化同心麻花钻的刀具柄和刀具头的螺旋条中设置有冷却孔。
  11. 如权利要求1-4任一所述的微强化同心麻花钻，
    其特征在于：所述的微强化同心麻花钻从中心横刃开始以向外侧的侧刃方向的后切削面上高度降低的方式设置至少一级或多级台阶。
    或所述的微强化同心麻花钻的切削刃上设置有至少一个或多个凹口刃，所述的凹口刃向后切削面延伸形成有至少一个或多个凹槽。
  12. 如权利要求2-4任一所述的微强化同心麻花钻，
    其特征在于：所述的微强化同心麻花钻的两侧螺旋切削面上沿轴向中心对称的设置有沿螺旋切削刃凹陷的微强化同心耐磨槽；
    所述微强化同心麻花钻的微强化同心耐磨槽中设置有微强化同心耐磨台和微强化同心耐磨切削面；微强化同心耐磨切削面沿螺旋切削面延伸至轴向前端与后切削面相交形成有微强化同心耐磨切削刃。
  13. 如权利要求1-4任一所述的微强化同心麻花钻，
    其特征在于：所述的微强化同心麻花钻轴向中心两侧的螺旋切削面上至少有一组凸起的结构是对称的，并且是在公差范围内的。
PCT/CN2022/097191 2021-06-06 2022-06-06 微强化同心麻花钻 WO2022257891A1 (zh)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090317202A1 (en) * 2006-06-09 2009-12-24 Jiangsu Tiangong Tools Co., Ltd. Strong high performance twist drill
CN111730111A (zh) * 2020-05-17 2020-10-02 李仕清 合金刀头麻花钻
CN112191893A (zh) * 2020-05-17 2021-01-08 李仕清 定位合金刀头麻花钻
CN112191894A (zh) * 2020-05-17 2021-01-08 李仕清 定心合金刀头麻花钻
CN112453571A (zh) * 2020-12-05 2021-03-09 无锡卓荣精密机械有限公司 一种可调节锯床电控箱
CN113510280A (zh) * 2021-06-06 2021-10-19 山东至伟机械有限公司 微强化同心麻花钻

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090317202A1 (en) * 2006-06-09 2009-12-24 Jiangsu Tiangong Tools Co., Ltd. Strong high performance twist drill
CN111730111A (zh) * 2020-05-17 2020-10-02 李仕清 合金刀头麻花钻
CN112191893A (zh) * 2020-05-17 2021-01-08 李仕清 定位合金刀头麻花钻
CN112191894A (zh) * 2020-05-17 2021-01-08 李仕清 定心合金刀头麻花钻
CN112453571A (zh) * 2020-12-05 2021-03-09 无锡卓荣精密机械有限公司 一种可调节锯床电控箱
CN113510280A (zh) * 2021-06-06 2021-10-19 山东至伟机械有限公司 微强化同心麻花钻

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