CN103537734A

CN103537734A - Composite blade center bit or composite blade countersink bit

Info

Publication number: CN103537734A
Application number: CN201210455897.8A
Authority: CN
Inventors: 李仕清
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-07-12
Filing date: 2012-11-06
Publication date: 2014-01-29

Abstract

The invention provides a composite blade center bit or a composite blade countersink bit, and mainly relates to a machining twist drill for machining. The bit is high in stability, high in heat dissipation efficiency, long in service life, and easy to position in drilling. The bit comprises a bit body and is characterized in that a definition of height relation between an anti-crack slitting table or an efficient slitting table and an adjacent efficient slitting table on the inner side is formed, the included angle alpha between a composite cutting face and an adjacent composite positioning dismantling table is larger than or equal to 90 degrees, or the height h of the adjacent composite cutting face is larger than or equal to 0.01 millimeter or smaller than four fifth of the thickness of discharged filings or smaller than or equal to a nine-fold product value of cutting feeding amount, or the width of the anti-crack slitting table is larger than 0.6 millimeter or smaller than or equal to one third of the diameter of the bit.

Description

Compound sword centre drill or compound sword counterbit

Technical field:

The present invention relates to a kind of compound sword centre drill or compound sword counterbit, this compound sword centre drill or compound sword counterbit are for drilling machine processing and pincers worker maintenance.

Background technology:

At present, the fluted drill using in machining is by chisel edge, cutting edge, secondary sword, side edge forms, cutting edge and secondary sword are roughly single structure, adjective-centre structure is poor, these fluted drill utmost points are not durable, especially when cutting the higher workpiece of hardness, (Milling) easily produce a large amount of heat boring, the lower hardness that causes cutter head, cause the wearing and tearing of cutter head, also there is the defect of frangibility in this cutter head simultaneously, and, because the cutting edge on cutter head both sides is symmetrical when the work, and cutting output is only generally that tens of microns are to 1 millimeter, so be difficult to grasp angle and height when artificial reconditioning, in addition, the precision in these fluted drills and the hole that processes is defective, very easily there is waste product, simultaneously, when the harder workpiece of processing, also exist and cutting edge is collapsed to tooth or cutter head break that beating lives causes the problem of industrial accident.

Summary of the invention:

The present invention proposes in view of the above-mentioned problems, and take provides a kind of helical tooth blade of novel combined positioning cutting as object, and this kind of cutter radiating efficiency is high, and intensity is large, and the life-span is long, and adds and easily locate man-hour in drilling.

For achieving the above object, the present invention adopts following technical proposals:

Compound sword centre drill or compound sword counterbit, relate generally to centre drill or counterbit for machining, relate to various not with the centre drill that protects cone, various bands protect the centre drill of cone, various arc centre drills, various centre drills, various 90 ° of taper countersinks of Morse taper shank with interchangeable guide pillar, 90 ° of taper countersinks of staight shank of the whole guide pillar of various bands, the various Morse taper shank counterbores with interchangeable guide pillar, the various Mohs staight shank counterbores with interchangeable guide pillar, various 60 °, 90 °, 120 ° of staight shank taper countersinks, various 60 °, 90 °, 120 ° of taper shank taper countersinks, or other various counterbits, or various centre drills, comprise cutterhead, cutterhead is provided with a plurality of cutting blades or cutting cutter hub integratedly, the tooth shape towards cutting direction exterior side of each cutting blade or cutting cutter hub becomes front cutting edge, the face towards direction of rotation at front cutting edge place forms cutting face, the face of the axial forward end rear side in cutting face forms rear cutting face, the crossing cutting edge that is formed with in Yu Hou cutting face, cutting face, it is characterized in that: on compound sword centre drill or compound sword counterbit, integratedly, or connect and carry out with forming as one the setting of following technical scheme, inner side in the cutting face towards direction of rotation of this front cutting edge, the at least combined cut face of one-level inner side that is provided with through arc convex or oblique raised step shape projection, or the extension that erects of arc convex or oblique projection, be formed with the compound location crossing with the combined cut face of inner side and decompose platform, the cutting face of arranged in step shape is for efficiently cutting platform, the cutting edge of arranged in step shape is efficient minute cutting blade, the outermost platform of efficiently cutting is that cracking resistance is cut platform, outermost efficient minute cutting blade is that cracking resistance is divided cutting blade, or arc convex or oblique projection extend to front end vertically, or extend on cutting edge to rear portion arc, be formed with the recessed sword of side or skew back sword, or cracking resistance is cut platform, or efficiently cut platform and compound decomposition platform and intersect, be formed with the angle that is more than or equal to 90 °, or arc convex or oblique projection extend to vertically front end or extend on cutting edge to rear portion arc, be formed with the recessed sword of side or skew back sword, with stair-stepping cutting edge, or from cutting edge to direction of rotation on cutting face, relatively depression is provided with Baltimore groove, or dovetail groove, or square groove, or del groove, or deep-slotted chip breaker, or shaped groove, or cutting face after planar shaped, or cutting face after notch cuttype, or the contextual definition that cracking resistance is cut platform or efficiently cut the height of efficiently cutting platform that platform is adjacent with inner side is, cracking resistance is cut platform or is efficiently cut platform and the height of efficiently cutting platform of adjacent inner side is that the depth of cut is multiplied by product number, when work piece hardness or viscosity are larger compared with high and cutter, the cutting depth of cut is less, the product number that the depth of cut is taken advantage of is larger, when work piece hardness or viscosity compared with high and cutter hour, the cutting depth of cut is less, the product number that the depth of cut is taken advantage of is larger, when work piece hardness or viscosity are larger compared with low and cutter, the cutting depth of cut is larger, the product number that the depth of cut is taken advantage of is less, when work piece hardness or viscosity compared with low and cutter hour, the cutting depth of cut is larger, the product number that the depth of cut is taken advantage of is less, or the height of combined cut face that cracking resistance is cut platform and adjacent inner side is for being more than or equal to 0.01 millimeter, or be less than the bits of discharging after this kind of Tool in Cutting thickness 4/5ths, or be less than the height of the product number of 9 times of the cutting amount of feeding, or the width that cracking resistance is cut platform is for being greater than 0.6 millimeter, or be less than or equal to 1/3rd of this tool diameter, the any one cutting way of above structure, or the formed combination sword of any combination of above cutting way arranges formed compound sword centre drill or compound sword counterbit on centre drill or counterbit.

Compound sword centre drill or compound sword counterbit, relate generally to centre drill or counterbit for machining, relate to various not with the centre drill that protects cone, various bands protect the centre drill of cone, various arc centre drills, various centre drills, various 90 ° of taper countersinks of Morse taper shank with interchangeable guide pillar, 90 ° of taper countersinks of staight shank of the whole guide pillar of various bands, the various Morse taper shank counterbores with interchangeable guide pillar, the various Mohs staight shank counterbores with interchangeable guide pillar, various 60 °, 90 °, 120 ° of staight shank taper countersinks, various 60 °, 90 °, 120 ° of taper shank taper countersinks, or other various counterbits, or various centre drills, comprise cutterhead, cutterhead is provided with a plurality of cutting blades or cutting cutter hub integratedly, the tooth shape towards cutting direction exterior side of each cutting blade or cutting cutter hub becomes front cutting edge, the face towards direction of rotation at front cutting edge place forms cutting face, the face of the axial forward end rear side in cutting face forms rear cutting face, the crossing cutting edge that is formed with in Yu Hou cutting face, cutting face, on compound sword centre drill or compound sword counterbit, integratedly, or connect and carry out with forming as one the setting of following technical scheme, inner side in the cutting face towards direction of rotation of this front cutting edge, the at least combined cut face of one-level inner side that is provided with through arc convex or oblique raised step shape projection, or the extension that erects of arc convex or oblique projection, be formed with the compound location crossing with the combined cut face of inner side and decompose platform, the cutting face of arranged in step shape is for efficiently cutting platform, the cutting edge of arranged in step shape is efficient minute cutting blade, the outermost platform of efficiently cutting is that cracking resistance is cut platform, outermost efficient minute cutting blade is that cracking resistance is divided cutting blade, or arc convex or oblique projection extend to front end vertically, or extend on cutting edge to rear portion arc, be formed with the recessed sword of side or skew back sword, or cracking resistance is cut platform, or efficiently cut platform and compound decomposition platform and intersect, be formed with the angle that is more than or equal to 90 °, or arc convex or oblique projection extend to vertically front end or extend on cutting edge to rear portion arc, be formed with the recessed sword of side or skew back sword, with stair-stepping cutting edge, or from cutting edge to direction of rotation on cutting face, relatively depression is provided with Baltimore groove, or dovetail groove, or square groove, or del groove, or deep-slotted chip breaker, or shaped groove, or cutting face after planar shaped, or cutting face after notch cuttype, or the contextual definition that cracking resistance is cut platform or efficiently cut the height of efficiently cutting platform that platform is adjacent with inner side is, cracking resistance is cut platform or is efficiently cut platform and the height of efficiently cutting platform of adjacent inner side is that the depth of cut is multiplied by product number, when work piece hardness or viscosity are larger compared with high and cutter, the cutting depth of cut is less, the product number that the depth of cut is taken advantage of is larger, when work piece hardness or viscosity compared with high and cutter hour, the cutting depth of cut is less, the product number that the depth of cut is taken advantage of is larger, when work piece hardness or viscosity are larger compared with low and cutter, the cutting depth of cut is larger, the product number that the depth of cut is taken advantage of is less, when work piece hardness or viscosity compared with low and cutter hour, the cutting depth of cut is larger, the product number that the depth of cut is taken advantage of is less, or the height of combined cut face that cracking resistance is cut platform and adjacent inner side is for being more than or equal to 0.01 millimeter, or be less than the bits of discharging after this kind of Tool in Cutting thickness 4/5ths, or be less than the height of the product number of 9 times of the cutting amount of feeding, or the width that cracking resistance is cut platform is for being greater than 0.6 millimeter, or be less than or equal to 1/3rd of this tool diameter, it is characterized in that: or in the cutting face of the axial forward end of centre drill or counterbit, with rear cutting face, intersect, the corner that the cutting edge forming and front cutting edge are crossing, part arranges cracking resistance and cuts platform, and be formed with respectively cracking resistance and cut platform, with the crossing cutting edge in rear cutting face, or local front cutting edge is that cracking resistance is divided cutting blade, the any one cutting way of above structure, or the formed combination sword of any combination of above cutting way arranges formed compound sword centre drill or compound sword counterbit on centre drill or counterbit.

Compound sword centre drill or compound sword counterbit, relate generally to centre drill or counterbit for machining, relate to various not with the centre drill that protects cone, various bands protect the centre drill of cone, various arc centre drills, various centre drills, various 90 ° of taper countersinks of Morse taper shank with interchangeable guide pillar, 90 ° of taper countersinks of staight shank of the whole guide pillar of various bands, the various Morse taper shank counterbores with interchangeable guide pillar, the various Mohs staight shank counterbores with interchangeable guide pillar, various 60 °, 90 °, 120 ° of staight shank taper countersinks, various 60 °, 90 °, 120 ° of taper shank taper countersinks, or other various counterbits, or various centre drills, comprise cutterhead, cutterhead is provided with a plurality of cutting blades or cutting cutter hub integratedly, the tooth shape towards cutting direction exterior side of each cutting blade or cutting cutter hub becomes front cutting edge, the face towards direction of rotation at front cutting edge place forms cutting face, the face of the axial forward end rear side in cutting face forms rear cutting face, the crossing cutting edge that is formed with in Yu Hou cutting face, cutting face, on compound sword centre drill or compound sword counterbit, integratedly, or connect and carry out with forming as one the setting of following technical scheme, inner side in the cutting face towards direction of rotation of this front cutting edge, the at least combined cut face of one-level inner side that is provided with through arc convex or oblique raised step shape projection, or the extension that erects of arc convex or oblique projection, be formed with the compound location crossing with the combined cut face of inner side and decompose platform, the cutting face of arranged in step shape is for efficiently cutting platform, the cutting edge of arranged in step shape is efficient minute cutting blade, the outermost platform of efficiently cutting is that cracking resistance is cut platform, outermost efficient minute cutting blade is that cracking resistance is divided cutting blade, or arc convex or oblique projection extend to front end vertically, or extend on cutting edge to rear portion arc, be formed with the recessed sword of side or skew back sword, or cracking resistance is cut platform, or efficiently cut platform and compound decomposition platform and intersect, be formed with the angle that is more than or equal to 90 °, or arc convex or oblique projection extend to vertically front end or extend on cutting edge to rear portion arc, be formed with the recessed sword of side or skew back sword, with stair-stepping cutting edge, or from cutting edge to direction of rotation on cutting face, relatively depression is provided with Baltimore groove, or dovetail groove, or square groove, or del groove, or deep-slotted chip breaker, or shaped groove, or cutting face after planar shaped, or cutting face after notch cuttype, or the contextual definition that cracking resistance is cut platform or efficiently cut the height of efficiently cutting platform that platform is adjacent with inner side is, cracking resistance is cut platform or is efficiently cut platform and the height of efficiently cutting platform of adjacent inner side is that the depth of cut is multiplied by product number, when work piece hardness or viscosity are larger compared with high and cutter, the cutting depth of cut is less, the product number that the depth of cut is taken advantage of is larger, when work piece hardness or viscosity compared with high and cutter hour, the cutting depth of cut is less, the product number that the depth of cut is taken advantage of is larger, when work piece hardness or viscosity are larger compared with low and cutter, the cutting depth of cut is larger, the product number that the depth of cut is taken advantage of is less, when work piece hardness or viscosity compared with low and cutter hour, the cutting depth of cut is larger, the product number that the depth of cut is taken advantage of is less, or the height of combined cut face that cracking resistance is cut platform and adjacent inner side is for being more than or equal to 0.01 millimeter, or be less than the bits of discharging after this kind of Tool in Cutting thickness 4/5ths, or be less than the height of the product number of 9 times of the cutting amount of feeding, or the width that cracking resistance is cut platform is for being greater than 0.6 millimeter, or be less than or equal to 1/3rd of this tool diameter, or in the cutting face of the axial forward end of centre drill or counterbit, with rear cutting face, intersect, the corner that the cutting edge forming and front cutting edge are crossing, part arranges cracking resistance and cuts platform, and be formed with respectively cracking resistance and cut platform, with the crossing cutting edge in rear cutting face, or local front cutting edge is that cracking resistance is divided cutting blade, it is characterized in that: at least one-level groove is set on combined cut face, the any one cutting way of above structure, or the formed combination sword of any combination of above cutting way arranges formed compound sword centre drill or compound sword counterbit on centre drill or counterbit.

Compound sword centre drill or compound sword counterbit, relate generally to centre drill or counterbit for machining, relate to various not with the centre drill that protects cone, various bands protect the centre drill of cone, various arc centre drills, various centre drills, various 90 ° of taper countersinks of Morse taper shank with interchangeable guide pillar, 90 ° of taper countersinks of staight shank of the whole guide pillar of various bands, the various Morse taper shank counterbores with interchangeable guide pillar, the various Mohs staight shank counterbores with interchangeable guide pillar, various 60 °, 90 °, 120 ° of staight shank taper countersinks, various 60 °, 90 °, 120 ° of taper shank taper countersinks, or other various counterbits, or various centre drills, comprise cutterhead, cutterhead is provided with a plurality of cutting blades or cutting cutter hub integratedly, the tooth shape towards cutting direction exterior side of each cutting blade or cutting cutter hub becomes front cutting edge, the face towards direction of rotation at front cutting edge place forms cutting face, the face of the axial forward end rear side in cutting face forms rear cutting face, the crossing cutting edge that is formed with in Yu Hou cutting face, cutting face, on compound sword centre drill or compound sword counterbit, integratedly, or connect and carry out with forming as one the setting of following technical scheme, inner side in the cutting face towards direction of rotation of this front cutting edge, the at least combined cut face of one-level inner side that is provided with through arc convex or oblique raised step shape projection, or the extension that erects of arc convex or oblique projection, be formed with the compound location crossing with the combined cut face of inner side and decompose platform, the cutting face of arranged in step shape is for efficiently cutting platform, the cutting edge of arranged in step shape is efficient minute cutting blade, the outermost platform of efficiently cutting is that cracking resistance is cut platform, outermost efficient minute cutting blade is that cracking resistance is divided cutting blade, or arc convex or oblique projection extend to front end vertically, or extend on cutting edge to rear portion arc, be formed with the recessed sword of side or skew back sword, or cracking resistance is cut platform, or efficiently cut platform and compound decomposition platform and intersect, be formed with the angle that is more than or equal to 90 °, or arc convex or oblique projection extend to vertically front end or extend on cutting edge to rear portion arc, be formed with the recessed sword of side or skew back sword, with stair-stepping cutting edge, or from cutting edge to direction of rotation on cutting face, relatively depression is provided with Baltimore groove, or dovetail groove, or square groove, or del groove, or deep-slotted chip breaker, or shaped groove, or cutting face after planar shaped, or cutting face after stairstepping, or the contextual definition that cracking resistance is cut platform or efficiently cut the height of efficiently cutting platform that platform is adjacent with inner side is, cracking resistance is cut platform or is efficiently cut platform and the height of efficiently cutting platform of adjacent inner side is that the depth of cut is multiplied by product number, when work piece hardness or viscosity are larger compared with high and cutter, the cutting depth of cut is less, the product number that the depth of cut is taken advantage of is larger, when work piece hardness or viscosity compared with high and cutter hour, the cutting depth of cut is less, the product number that the depth of cut is taken advantage of is larger, when work piece hardness or viscosity are larger compared with low and cutter, the cutting depth of cut is larger, the product number that the depth of cut is taken advantage of is less, when work piece hardness or viscosity compared with low and cutter hour, the cutting depth of cut is larger, the product number that the depth of cut is taken advantage of is less, or the height of combined cut face that cracking resistance is cut platform and adjacent inner side is for being more than or equal to 0.01 millimeter, or be less than the bits of discharging after this kind of Tool in Cutting thickness 4/5ths, or be less than the height of the product number of 9 times of the cutting amount of feeding, or the width that cracking resistance is cut platform is for being greater than 0.6 millimeter, or be less than or equal to 1/3rd of this tool diameter, or in the cutting face of the axial forward end of centre drill or counterbit, with rear cutting face, intersect, the corner that the cutting edge forming and front cutting edge are crossing, part arranges cracking resistance and cuts platform, and be formed with respectively cracking resistance and cut platform, with the crossing cutting edge in rear cutting face, or local front cutting edge is that cracking resistance is divided cutting blade, at least one-level groove is set on combined cut face, it is characterized in that: on the cutting edge of compound sword centre drill or compound sword counterbit, be formed with efficient minute cutting blade, or cutting blade is divided in compound location, or ladder sword, or composite step sword, or recess sword, or compound recess sword, or shaped form cutting edge is curved edge, or compound curved sword, or the formed combination sword of any combination of above cutting way arranges formed compound sword centre drill or compound sword counterbit on centre drill or counterbit.

Preferably, on each cutting blade of described compound sword centre drill or compound sword counterbit or the apex point of cutting cutter hub, from the position of tool axis the direction of front cutting edge toward the outer side, be formed with at least one-level cutting face protrudingly, at least platform is cut in the compound location of one-level, and one-level front cutting edge at least.

Preferably, at described cutting blade or the cutting stair-stepping rear cutting face of at least two-stage of cutter hub and the cutting edge on fillet surface or a centering minute cutting blade, at least one recess sword is set, recess sword is opening, and cutting face or cutting face are extended and are amplified the groove that shape distributes backward.

Preferably, on the cutterhead of described cutter to run through this cutterhead and to be folded with alloy cutter head with respect to the centrosymmetric mode of end face, the mode that described alloy cutter head starts to reduce highly gradually laterally from cutterhead axial centre is formed with one or more levels step, and is formed with stair-stepping cutting edge on rear cutting face or cutting face.

Preferably, at described cutting blade or the cutting Huo Hou cutting face, cutting face of cutter hub and the cutting edge on fillet surface or a centering minute cutting blade, at least one recess sword or compound recess sword are set, recess sword or compound recess sword are opening cutting face or cutting face are extended or amplified shape and extend groove or the compound groove distributing backward.

Preferably, the recess sword at described centre drill or counterbit is the multiaspect chamber shapes such as inverted trapezoidal or square or arc.

Preferably, on the cutterhead of described cutter, to run through this cutterhead and to be provided with alloy cutter head or Integral alloy cutterhead with respect to the centrosymmetric mode of end face, the mode that described alloy cutter head or Integral alloy cutterhead start to reduce highly gradually laterally from cutterhead axial centre is formed with one or more levels step.

Preferably, at described centre drill or counterbit, it is Integral alloy cutter head, the mode that described alloy cutter head starts to reduce highly gradually laterally from cutterhead axial centre is formed with one or more levels step, and on rear cutting face or cutting face, be formed with stair-stepping cutting edge, or recess sword, or compound recess sword.

Preferably, on the rear cutting face of described cutter, be formed with at least one groove and front cutting face or cracking resistance and cut platform or the compound location of spiral and cut platform and intersect and be formed with at least one recess sword, the bottom shape of the bottom shape of groove and recess sword is trapezoidal, triangle or arc or other polyhedron shapes.

Preferably, at described compound sword centre drill or compound sword counterbit, cutting face or radiating surface or Yu Hou cutting face, front cutting face intersect and form at least one-level and divide cutting blade or a location minute cutting blade.

Preferably, at described compound sword centre drill or compound sword counterbit, on the cutting edge or apex point of projection, there is a location minute cutting blade, and to drillstock, extend to form compound location and cut platform.

Preferably, be formed with at least an one-level location minute cutting blade on the apex point of described compound sword centre drill or compound sword counterbit, at least platform and one-level front cutting edge are at least cut in the compound location of one-level.

Preferably, at the cutting edge of described compound sword centre drill or compound sword counterbit, be straight sword, or recess sword, or trapezoidal sword, or triangular edge, or on square opening sword, be formed with a minute cutting blade.

Preferably, at described compound sword centre drill or compound sword counterbit outermost and the crossing cutting edge of front cutting edge or the angle of minute cutting blade and front cutting edge, be acute angle or right angle or obtuse angle.

Preferably, at the cutting blade of described compound sword centre drill or compound sword counterbit or the front portion of cutting cutter hub, connect cutter tip.

Preferably, on the front cutting face of described compound location centering minute cutting blade, be formed with at least secondary sword of centering of one-level combined positioning cutting.

Preferably, on front cutting face, be formed with at least secondary sword of the compound location of one-level combined cut.

Preferably, in the secondary sword of the centering of described compound sword centre drill or compound sword counterbit outside to being formed with groove or plane between side edge.

Beneficial effect:

By cracking resistance, cut platform or efficiently cut the definition of the relation of the height of efficiently cutting platform that platform is adjacent with inner side, cracking resistance is cut platform or is efficiently cut platform and the height of efficiently cutting platform of adjacent inner side is that the depth of cut is multiplied by product number, when work piece hardness or viscosity are larger compared with high and cutter, the cutting depth of cut is less, the product number that the depth of cut is taken advantage of is larger, when work piece hardness or viscosity compared with high and cutter hour, the cutting depth of cut is less, the product number that the depth of cut is taken advantage of is larger, when work piece hardness or viscosity are larger compared with low and cutter, the cutting depth of cut is larger, the product number that the depth of cut is taken advantage of is less, when work piece hardness or viscosity compared with low and cutter hour, the cutting depth of cut is larger, the product number that the depth of cut is taken advantage of is less, realized the numerical value rule of the required cutter of high efficiency centering centre drill or counterbit suitability for industrialized production, by the detailed restriction of angle and data, further successfully realized determining of more high-precision numerical value, and flat sword or compound flat sword that cutting edge arranges, or the ladder sword or the composite step sword that reduce highly gradually laterally, or recess sword, or the compound recess sword overlapping with recess sword, or there is the oblique sword of angle with cutterhead longitudinal center line or front cutting edge, or there is the composite inclined sword of certain angle or arranged in step shape with oblique sword, various cutting edge or combination sword had both further improved efficiency, expanded again the scope of application of compound sword centre drill or compound sword counterbit.

Accompanying drawing explanation:

Technical scheme of the present invention and advantage will be described in detail in conjunction with the drawings, in this accompanying drawing:

Fig. 1,, Fig. 2, Fig. 3 is the compound sword centre drill of the first embodiment of the present invention or compound sword counterbit

Schematic diagram.

Fig. 4, Fig. 5, Fig. 6 is the compound sword centre drill of the second embodiment of the present invention or the schematic diagram of compound sword counterbit.

Fig. 7, Fig. 8, Fig. 9 is the compound sword centre drill of the 3rd embodiment of the present invention or the schematic diagram of compound sword counterbit.

Figure 10, Figure 11 is the compound sword centre drill of the 4th embodiment of the present invention or the schematic diagram of compound sword counterbit.

Figure 12, Figure 13 is the compound sword centre drill of the 5th embodiment of the present invention or the schematic diagram of compound sword counterbit.

Figure 14, Figure 15 is the compound sword centre drill of the 6th embodiment of the present invention or the schematic diagram of compound sword counterbit.

Figure 16, Figure 17 is the compound sword centre drill of the 7th embodiment of the present invention or the schematic diagram of compound sword counterbit.

Figure 18, Figure 19 is the compound sword centre drill of the 8th embodiment of the present invention or the schematic diagram of compound sword counterbit.

Figure 20, Figure 21 is the compound sword centre drill of the 9th embodiment of the present invention or the schematic diagram of compound sword counterbit.

The specific embodiment:

Below in conjunction with accompanying drawing, explain the preferred embodiment of compound sword centre drill of the present invention or compound sword counterbit, the cutter with two cutting blades or cutting cutter hub of mainly take in embodiment 1-4 describes as example.

Embodiment 1

As Fig. 1, , Fig. 2, shown in Fig. 3, the compound sword centre drill of the first embodiment of the present invention or compound sword counterbit be not with the embodiment protecting on the centre drill of cone, relate generally to centre drill or counterbit for machining, comprise cutterhead, cutterhead is provided with front cutting cone 29 and rear cutting cone 30 integratedly, between front cutting cone 29 and rear cutting cone 30, be provided with integratedly front cutter hub 31, the rear portion of rear cutting cone 30 is rear cutter hub 32, front cutting cone 29, front cutter hub and rear cutting cone 30 are respectively by a plurality of cutting blades or cutting cutter hub 2 form integratedly, the tooth shape towards cutting direction exterior side of each cutting blade or cutting cutter hub 2 becomes front cutting edge 14, the face towards direction of rotation at front cutting edge 14 places forms cutting face 7, the face of the axial forward end rear side in cutting face 7 forms rear cutting face 4, cutting face 7 is intersected and is formed with main cutting edge 21 with rear cone cutting face 25, the face of the exterior side of front cutting edge 14 and main cutting edge 21 is secondary cutting face 24, rear cone cutting face 25, on compound sword centre drill or compound sword counterbit, integratedly, or connect and carry out with forming as one the setting of following technical scheme, inner side in the cutting face 7 towards direction of rotation of this front cutting edge 14, the at least combined cut face 3 of one-level inner side that is provided with through arc convex or oblique protruding 19 stepped projections, or arc convex or oblique protruding 19 extensions that erect, be formed with the compound location crossing with the combined cut face 3 of inner side and decompose platform 6, the cutting face of arranged in step shape is for efficiently cutting platform, the main cutting edge 21 of arranged in step shape, 10 or front cutting edge 14, 15 is efficient minute cutting blade, the outermost platform of efficiently cutting is that cracking resistance is cut platform 7, outermost efficient minute cutting blade is that cracking resistance is divided

cutting blade

14, 21, or arc convex or oblique protruding 19 extends to front end vertically, or extend on cutting edge to rear portion arc, be formed with the recessed sword of side or skew back sword 20, or cracking resistance is cut platform, or efficiently cut platform and arc convex or oblique protruding 19 and intersect, or intersect with the compound decomposition platform extending to form 6 that arc convex or oblique protruding 19 erects, be formed with the angle a that is more than or equal to 90 °, with stair-stepping

main cutting edge

21, 10 or front cutting edge 14, 15, at front end, be formed with stair-stepping

main cutting edge

22, 23, or from the front end of centre drill or counterbit side edge incline direction laterally on cutting face 4, relatively depression is provided with Baltimore groove, or dovetail groove, or square groove, or del groove, or deep-slotted chip breaker, or shaped groove, or cutting face after planar shaped, or cutting face after notch cuttype, or the contextual definition that cracking resistance is cut platform or efficiently cut the height h that efficiently cuts platform that platform is adjacent with inner side is, cracking resistance is cut platform or is efficiently cut platform and the height of efficiently cutting platform of adjacent inner side is that the depth of cut is multiplied by product number, when work piece hardness or viscosity are larger compared with high and cutter, the cutting depth of cut is less, the product number that the depth of cut is taken advantage of is larger, when work piece hardness or viscosity compared with high and cutter hour, the cutting depth of cut is less, the product number that the depth of cut is taken advantage of is larger, when work piece hardness or viscosity are larger compared with low and cutter, the cutting depth of cut is larger, the product number that the depth of cut is taken advantage of is less, when work piece hardness or viscosity compared with low and cutter hour, the cutting depth of cut is larger, the product number that the depth of cut is taken advantage of is less, or the height h of combined cut face that cracking resistance is cut platform and adjacent inner side is for being more than or equal to 0.01 millimeter, or be less than the bits of discharging after this kind of Tool in Cutting thickness 4/5ths, or be less than the height of the product number of 9 times of the cutting amount of feeding, or the width a that cracking resistance is cut platform is for being greater than 0.6 millimeter, or be less than or equal to 1/3rd of this tool diameter, at least one-level groove 28 is set efficiently cutting on platform, intersect and be formed with recess sword 17 with rear cutting face, the any one of above structure or be combined formed compound sword centre drill or compound sword counterbit.

According to said structure, provide the cracking resistance arranging on cutterhead 1 and cut width or the height of platform, and the above data of angle are going out through practice, as surpassed this scope, will have a greatly reduced quality in efficiency or service life, this kind of cutter can decompose the cutting force of cutting edge, reduce the frictional strength of cutting edge, especially the frictional force frictional heat generation that has reduced secondary cutting face 5 reduces, can also increase the area of dissipation of cutterhead simultaneously, reduce cutterhead temperature, decompose cutting edge stressed of flimsy outer end of cutter, extended cutter life, and in process, keep high strength always.

Embodiment 2

As Fig. 4, Fig. 5, shown in Fig. 6, the compound sword centre drill of the second embodiment of the present invention or compound sword counterbit protect the embodiment on the centre drill of cone at band, on the basis of the first embodiment, present embodiment comprises cutterhead, cutterhead is provided with front cutting cone 29 and rear cutting cone 30 integratedly, between front cutting cone 29 and rear cutting cone 30, be provided with integratedly front cutter hub 31, the rear portion of rear cutting cone 30 is rear cutter hub 32, front cutting cone 29, front cutter hub and rear cutting cone 30 are respectively by a plurality of cutting blades or cutting cutter hub 2 form integratedly, between front cutter hub 31 and rear cutting cone 30, be provided with integratedly and protect cone 33, the face that protects cone 33 exterior sides is rear cone 27, face towards cutting direction is that cutting face 7 is intersected and is formed with inner cone sword 26 with rear cone 27, the tooth shape towards cutting direction exterior side of each cutting blade or cutting cutter hub 2 becomes front cutting edge 14, the face towards direction of rotation at front cutting edge 14 places forms cutting face 7, the face of the axial forward end rear side in cutting face 7 forms rear cutting face 4, cutting face 7 is intersected and is formed with main cutting edge 21 with rear cone cutting face 25, the face of the exterior side of front cutting edge 14 and main cutting edge 21 is secondary cutting face 24, main cutting face 25, on compound sword centre drill or compound sword counterbit, integratedly, or connect and carry out with forming as one the setting of following technical scheme, inner side in the cutting face 7 towards direction of rotation of this front cutting edge 14, the at least combined cut face 3 of one-level inner side that is provided with through arc convex or oblique protruding 19 stepped projections, or arc convex or oblique protruding 19 extensions that erect, be formed with the compound location crossing with the combined cut face 3 of inner side and decompose platform 6, the cutting face of arranged in step shape is for efficiently cutting platform, the main cutting edge 21 of arranged in step shape, 10 or front cutting edge 14, 15 is efficient minute cutting blade, the outermost platform of efficiently cutting is that cracking resistance is cut platform 7, outermost efficient minute cutting blade is that cracking resistance is divided

cutting blade

main cutting edge

22, 23, or from the front end of centre drill or counterbit side edge incline direction laterally on cutting face 4, relatively depression is provided with Baltimore groove, or dovetail groove, or square groove, or del groove, or deep-slotted chip breaker, or shaped groove, or cutting face after planar shaped, or cutting face after notch cuttype, or the contextual definition that cracking resistance is cut platform or efficiently cut the height h that efficiently cuts platform that platform is adjacent with inner side is, cracking resistance is cut platform or is efficiently cut platform and the height of efficiently cutting platform of adjacent inner side is that the depth of cut is multiplied by product number, when work piece hardness or viscosity are larger compared with high and cutter, the cutting depth of cut is less, the product number that the depth of cut is taken advantage of is larger, when work piece hardness or viscosity compared with high and cutter hour, the cutting depth of cut is less, the product number that the depth of cut is taken advantage of is larger, when work piece hardness or viscosity are larger compared with low and cutter, the cutting depth of cut is larger, the product number that the depth of cut is taken advantage of is less, when work piece hardness or viscosity compared with low and cutter hour, the cutting depth of cut is larger, the product number that the depth of cut is taken advantage of is less, or the height h of combined cut face that cracking resistance is cut platform and adjacent inner side is for being more than or equal to 0.01 millimeter, or be less than the bits of discharging after this kind of Tool in Cutting thickness 4/5ths, or be less than the height of the product number of 9 times of the cutting amount of feeding, or the width a that cracking resistance is cut platform is for being greater than 0.6 millimeter, or be less than or equal to 1/3rd of this tool diameter, the any one of above structure or be combined formed compound sword centre drill or compound sword counterbit.

Embodiment 3

As Fig. 7, Fig. 8, shown in Fig. 9, the compound sword centre drill of the 3rd embodiment of the present invention or the embodiment of compound sword counterbit on arc centre drill, first---on the basis of two embodiments, present embodiment comprises cutterhead, cutterhead is provided with front cutting cone 29 and arc milling cone 34 integratedly, between front cutting cone 29 and arc milling cone 34, be provided with integratedly front cutter hub 31, the rear portion of arc milling cone 34 is rear cutter hub 32, front cutting cone 29, front cutter hub 31 and arc milling cone 34 are respectively by a plurality of cutting blades or cutting cutter hub 2 form integratedly, the face that arc milling is bored 34 exterior sides is arc rear cone 36, face towards cutting direction is cutting face 7, intersect and be formed with arc inner cone sword 35 with arc rear cone 36, the tooth shape towards cutting direction exterior side of each cutting blade or cutting cutter hub 2 becomes front cutting edge 14, the face towards direction of rotation at front cutting edge 14 places forms cutting face 7, the face of the axial forward end rear side in cutting face 7 forms rear cutting face 4, cutting face 7 is intersected and is formed with main cutting edge 21 with rear cone cutting face 25, the face of the exterior side of front cutting edge 14 and main cutting edge 21 is secondary cutting face 24, main cutting face 25, on compound sword centre drill or compound sword counterbit, integratedly, or connect and carry out with forming as one the setting of following technical scheme, inner side in the cutting face 7 towards direction of rotation of this front cutting edge 14, the at least combined cut face 3 of one-level inner side that is provided with through arc convex or oblique protruding 19 stepped projections, or arc convex or oblique protruding 19 extensions that erect, be formed with the compound location crossing with the combined cut face 3 of inner side and decompose platform 6, the cutting face of arranged in step shape is for efficiently cutting platform, the main cutting edge 21 of arranged in step shape, 10 or front cutting edge 14, 15 is efficient minute cutting blade, the outermost platform of efficiently cutting is that cracking resistance is cut platform 7, outermost efficient minute cutting blade is that cracking resistance is divided

cutting blade

main cutting edge

According to said structure, after being provided with of the center of cutterhead 1 top bump cutting face 4 and stage portion 8 therefore this cutter there is good stability, owing to being provided with on cutting face 3, efficiently cutting platform 7 and make this cutter in when cutting strengthen knowing clearly outer end cutting edge strength of cutterhead 1 again, strengthened cutterhead 1 stability, compare with cutter head in the past, increased again a new compound secondary sword 15, can carry out work with two front cutting edges thus, thereby the cutting force that can decompose front cutting edge 14, reduce the frictional strength of front cutting edge 14, by being set, recess sword 17 effectively decomposed cutting resistance, frictional heat generation is reduced, can also increase the area of dissipation of cutterhead simultaneously, reduce cutterhead temperature, extended cutter life, and in process, keep high strength always.

Embodiment 4

As Figure 10, shown in Figure 11, the compound sword centre drill of the 4th embodiment of the present invention or compound sword counterbit are at the embodiment of the 90 ° of taper countersinks of Morse taper shank with interchangeable guide pillar, first---on the basis of three embodiments, present embodiment comprises cutterhead, cutterhead is provided with a plurality of cutting blades or cutting cutter hub 2 integratedly, in cutterhead centre, one hole is set, on hole, configure a guide pillar 37, the side of cutterhead arranges a positioning screw hole, through the fixing guide pillar 37 of screw 38, the tooth shape towards cutting direction exterior side of each cutting blade or cutting cutter hub 2 becomes front cutting edge 14, the face towards direction of rotation at front cutting edge 14 places forms cutting face 7, the face of the axial forward end rear side in cutting face 7 forms rear cutting face 4, cutting face 7 is intersected and is formed with cutting edge 22 with rear cutting face 4, the interior cutting edge 23 of inner bulge, cutting edge 22 and interior cutting edge 23 are 45 ° with the angle of longitudinal center line, the face of front cutting edge 14 exterior sides is secondary cutting face 24, rear cutting face 4 is intersected and is formed with side edge 39 with secondary cutting face 24, on compound sword centre drill or compound sword counterbit, integratedly, or connect and carry out with forming as one the setting of following technical scheme, inner side in the cutting face 7 towards direction of rotation of this front cutting edge 14, the at least combined cut face 3 of one-level inner side that is provided with through arc convex or oblique protruding 19 stepped projections, or arc convex or oblique protruding 19 extensions that erect, be formed with the compound location crossing with the combined cut face 3 of inner side and decompose platform 6, the cutting face of arranged in step shape is for efficiently cutting platform, the cutting edge 22 of arranged in step shape, the interior cutting edge 23 of inner bulge or front cutting edge 14 are efficient minute cutting blade, the outermost platform of efficiently cutting is that cracking resistance is cut platform 7, outermost efficient minute cutting blade is that cracking resistance is divided

cutting blade

14, 22, or arc convex or oblique protruding 19 extends to front end vertically, or extend on cutting edge to rear portion arc, be formed with the recessed sword of side or skew back sword 20, or cracking resistance is cut platform, or efficiently cut platform and arc convex or oblique protruding 19 and intersect, or intersect with the compound decomposition platform extending to form 6 that arc convex or oblique protruding 19 erects, be formed with the angle a that is more than or equal to 90 °, with stair-stepping cutting edge 22, interior cutting edge 23 or front cutting edge 14, 15, at front end, be formed with stair-stepping cutting edge 22, interior cutting edge 23, or from the front end of centre drill or counterbit side edge incline direction laterally on cutting face 4, relatively depression is provided with Baltimore groove, or dovetail groove, or square groove, or del groove, or deep-slotted chip breaker, or shaped groove, or cutting face after planar shaped, or cutting face after notch cuttype, or the contextual definition that cracking resistance is cut platform or efficiently cut the height h that efficiently cuts platform that platform is adjacent with inner side is, cracking resistance is cut platform or is efficiently cut platform and the height of efficiently cutting platform of adjacent inner side is that the depth of cut is multiplied by product number, when work piece hardness or viscosity are larger compared with high and cutter, the cutting depth of cut is less, the product number that the depth of cut is taken advantage of is larger, when work piece hardness or viscosity compared with high and cutter hour, the cutting depth of cut is less, the product number that the depth of cut is taken advantage of is larger, when work piece hardness or viscosity are larger compared with low and cutter, the cutting depth of cut is larger, the product number that the depth of cut is taken advantage of is less, when work piece hardness or viscosity compared with low and cutter hour, the cutting depth of cut is larger, the product number that the depth of cut is taken advantage of is less, or the height h of combined cut face that cracking resistance is cut platform and adjacent inner side is for being more than or equal to 0.01 millimeter, or be less than the bits of discharging after this kind of Tool in Cutting thickness 4/5ths, or be less than the height of the product number of 9 times of the cutting amount of feeding, or the width a that cracking resistance is cut platform is for being greater than 0.6 millimeter, or be less than or equal to 1/3rd of this tool diameter, the any one of above structure or be combined formed compound sword centre drill or compound sword counterbit.

According to said structure, after being provided with of the center of cutterhead 1 top bump cutting face 4 and stage portion 8 therefore this cutter there is good stability, owing to being provided with on cutting face 3, efficiently cutting platform 7 and make this cutter in when cutting strengthen knowing clearly outer end cutting edge strength of cutterhead 1 again, having strengthened cutterhead 1 stability compares with cutter head in the past, increased again a new compound secondary sword 15, can carry out work with two front cutting edges thus, thereby the cutting force that can decompose front cutting edge 14, reduce the frictional strength of front cutting edge 14, by being set, recess sword 17 effectively decomposed cutting resistance, frictional heat generation is reduced, can also increase the area of dissipation of cutterhead simultaneously, reduce cutterhead temperature, extended cutter life, and in process, keep high strength always.

Embodiment 5

As Figure 12, Figure 13 shows, the compound sword centre drill of the 5th embodiment of the present invention or the compound sword counterbit embodiment on 90 ° of taper countersinks of the staight shank with whole guide pillar, cutterhead 1, first---on the basis of four embodiments, present embodiment comprises cutterhead, cutterhead is provided with a plurality of cutting blades or cutting cutter hub 2 integratedly, in cutterhead centre, one hole is set, on hole, configure a guide pillar 37, cutterhead front end arranges a fixing guide pillar 37 integratedly, the tooth shape towards cutting direction exterior side of each cutting blade or cutting cutter hub 2 becomes front cutting edge 14, the face towards direction of rotation at front cutting edge 14 places forms cutting face 7, the face of the axial forward end rear side in cutting face 7 forms rear cutting face 4, cutting face 7 is intersected and is formed with cutting edge 22 with rear cutting face 4, the face of front cutting edge 14 exterior sides is secondary cutting face 24, rear cutting face 4 is intersected and is formed with side edge 39 with secondary cutting face 24, on compound sword centre drill or compound sword counterbit, integratedly, or connect and carry out with forming as one the setting of following technical scheme, inner side in the cutting face 7 towards direction of rotation of this front cutting edge 14, the at least combined cut face 3 of one-level inner side that is provided with through arc convex or oblique protruding 19 stepped projections, or arc convex or oblique protruding 19 extensions that erect, be formed with the compound location crossing with the combined cut face 3 of inner side and decompose platform 6, the cutting face of arranged in step shape is for efficiently cutting platform, the interior cutting edge 23 of cutting edge 22 inner bulge of arranged in step shape or front cutting edge 14 are efficient minute cutting blade, the outermost platform of efficiently cutting is that cracking resistance is cut platform 7, outermost efficient minute cutting blade is that cracking resistance is divided

cutting blade

Embodiment 6

As Figure 14, Figure 15 shows, the compound sword centre drill of the 5th embodiment of the present invention or the embodiment of compound sword counterbit on the Morse taper shank counterbore with interchangeable guide pillar, first---on the basis of five embodiments, present embodiment comprises cutterhead, cutterhead is provided with a plurality of cutting blades or cutting cutter hub 2 integratedly, in cutterhead centre, one hole is set, on hole, configure a guide pillar 37, the side of cutterhead arranges a positioning screw hole, through the fixing guide pillar 37 of screw 38, the tooth shape towards cutting direction exterior side of each cutting blade or cutting cutter hub 2 becomes front cutting edge 14, the face towards direction of rotation at front cutting edge 14 places forms cutting face 7, the face of the axial forward end rear side in cutting face 7 forms rear cutting face 4, cutting face 7 is intersected and is formed with cutting edge 22 with rear cutting face 4, the interior cutting edge 23 of inner bulge, cutting edge 22 and interior cutting edge 23 are 90 ° with the angle of longitudinal center line, the face of front cutting edge 14 exterior sides is secondary cutting face 24, rear cutting face 4 is intersected and is formed with side edge 39 with secondary cutting face 24, on compound sword centre drill or compound sword counterbit, integratedly, or connect and carry out with forming as one the setting of following technical scheme, inner side in the cutting face 7 towards direction of rotation of this front cutting edge 14, the at least combined cut face 3 of one-level inner side that is provided with through arc convex or oblique protruding 19 stepped projections, or arc convex or oblique protruding 19 extensions that erect, be formed with the compound location crossing with the combined cut face 3 of inner side and decompose platform 6, the cutting face of arranged in step shape is for efficiently cutting platform, the cutting edge 22 of arranged in step shape, the interior cutting edge 23 of inner bulge or front cutting edge 14 are efficient minute cutting blade, the outermost platform of efficiently cutting is that cracking resistance is cut platform 7, outermost efficient minute cutting blade is that cracking resistance is divided

cutting blade

According to said structure, owing to being provided with on cutting face 3, efficiently cutting platform 7 and make this cutter strengthen the outer end cutting edge strength of cutterhead 1 in when cutting, strengthened cutterhead 1 stability, compare with cutter head in the past, increased again a new compound secondary sword 15, can carry out work with two front cutting edges thus, thereby the cutting force that can decompose front cutting edge 14, reduce the frictional strength of front cutting edge 14, by being set, recess sword 17 effectively decomposed cutting resistance, compare with cutter head in the past, cutting resistance significantly reduces, radiating effect significantly improves, stock-removing efficiency significantly strengthens, frictional heat generation is reduced, can also increase the area of dissipation of cutterhead simultaneously, reduce cutterhead temperature, extended cutter life, and in process, keep high strength always.

Embodiment 7

As Figure 16, Figure 17 shows, the compound sword centre drill of the 5th embodiment of the present invention or the compound sword counterbit embodiment on the Mohs staight shank counterbore with interchangeable guide pillar, first---on the basis of six embodiments, present embodiment comprises cutterhead, cutterhead is provided with a plurality of cutting blades or cutting cutter hub 2 integratedly, in cutterhead centre, one hole is set, on hole, configure a guide pillar 37, cutterhead front end arranges a fixing guide pillar 37 integratedly, the tooth shape towards cutting direction exterior side of each cutting blade or cutting cutter hub 2 becomes front cutting edge 14, the face towards direction of rotation at front cutting edge 14 places forms cutting face 7, the face of the axial forward end rear side in cutting face 7 forms rear cutting face 4, cutting face 7 is intersected and is formed with cutting edge 22 with rear cutting face 4, the face of front cutting edge 14 exterior sides is secondary cutting face 24, rear cutting face 4 is intersected and is formed with side edge 39 with secondary cutting face 24, on compound sword centre drill or compound sword counterbit, integratedly, or connect and carry out with forming as one the setting of following technical scheme, inner side in the cutting face 7 towards direction of rotation of this front cutting edge 14, the at least combined cut face 3 of one-level inner side that is provided with through arc convex or oblique protruding 19 stepped projections, or arc convex or oblique protruding 19 extensions that erect, be formed with the compound location crossing with the combined cut face 3 of inner side and decompose platform 6, the cutting face of arranged in step shape is for efficiently cutting platform, the interior cutting edge 23 of cutting edge 22 inner bulge of arranged in step shape or front cutting edge 14 are efficient minute cutting blade, the outermost platform of efficiently cutting is that cracking resistance is cut platform 7, outermost efficient minute cutting blade is that cracking resistance is divided

cutting blade

14, 22, or arc convex or oblique protruding 19 extends to front end vertically, or extend on cutting edge to rear portion arc, be formed with the recessed sword of side or skew back sword 20, or cracking resistance is cut platform, or efficiently cut platform and arc convex or oblique protruding 19 and intersect, or intersect with the compound decomposition platform extending to form 6 that arc convex or oblique protruding 19 erects, be formed with the angle a that is more than or equal to 90 °, with stair-stepping cutting edge 22, interior cutting edge 23 or front cutting edge 14, the front cutting edge 15 of projection, at front end, be formed with stair-stepping cutting edge 22, interior cutting edge 23, or from the front end of centre drill or counterbit side edge incline direction laterally on cutting face 4, relatively depression is provided with Baltimore groove, or dovetail groove, or square groove, or del groove, or deep-slotted chip breaker, or shaped groove, or cutting face after planar shaped, or cutting face after notch cuttype, or the contextual definition that cracking resistance is cut platform or efficiently cut the height h that efficiently cuts platform that platform is adjacent with inner side is, cracking resistance is cut platform or is efficiently cut platform and the height of efficiently cutting platform of adjacent inner side is that the depth of cut is multiplied by product number, when work piece hardness or viscosity are larger compared with high and cutter, the cutting depth of cut is less, the product number that the depth of cut is taken advantage of is larger, when work piece hardness or viscosity compared with high and cutter hour, the cutting depth of cut is less, the product number that the depth of cut is taken advantage of is larger, when work piece hardness or viscosity are larger compared with low and cutter, the cutting depth of cut is larger, the product number that the depth of cut is taken advantage of is less, when work piece hardness or viscosity compared with low and cutter hour, the cutting depth of cut is larger, the product number that the depth of cut is taken advantage of is less, or the height h of combined cut face that cracking resistance is cut platform and adjacent inner side is for being more than or equal to 0.01 millimeter, or be less than the bits of discharging after this kind of Tool in Cutting thickness 4/5ths, or be less than the height of the product number of 9 times of the cutting amount of feeding, or the width a that cracking resistance is cut platform is for being greater than 0.6 millimeter, or be less than or equal to 1/3rd of this tool diameter, the any one of above structure or be combined formed compound sword centre drill or compound sword counterbit.

According to said structure, due to cutting face 4 and inner side after being provided with of the center top bump at cutterhead 1, platform 6 is decomposed in compound location near axial centre place, strengthened the stability of cutterhead 1, therefore this cutter has the efficiency of good stability and Geng Gao, owing to being provided with on cutting face 3, efficiently cutting platform 7 and make this cutter in when cutting strengthen knowing clearly outer end cutting edge strength of cutterhead 1 again, the center drag of effectively having decomposed cutterhead 1, strengthened cutterhead 1 stability, compare with cutter head in the past, increased again a new compound secondary sword 15, can carry out work with two front cutting edges thus, thereby the cutting force that can decompose front cutting edge 14, reduce the frictional strength of front cutting edge 14, frictional heat generation is reduced, can also increase the area of dissipation of cutterhead simultaneously, extended cutter life, and in process, keep high strength always.

Embodiment 8

As Figure 18, shown in Figure 19, the compound sword centre drill of the 8th embodiment of the present invention or compound sword counterbit are at 60 °, 90 °, embodiment on 120 ° of staight shank taper countersinks, first---on the basis of seven embodiments, present embodiment comprises that anterior cutterhead also has the spot-facing cutter head at rear portion, adopt anterior design, and adopt in a like fashion with anterior figure number, cutterhead 1, cutterhead 1 is provided with a plurality of cutting blades or cutting cutter hub 2 integratedly, the face towards cutting direction of cutting blade or cutting cutter hub 2 is combined cut face 3, the top rear side in cutting face 3 is rear cutting face 4, outermost of cutting blade or cutting cutter hub 2 is screw pair cutting face 5, the crossing front cutting edge 14 that is formed with in Yu Fu cutting face, cutting face 5, the crossing side edge that is formed with in Yu Hou cutting face, secondary cutting face, the outside in cutting face is with stair-stepping projection inside axial centre, being formed with at least secondary cutting face of one-level projection is that platform 6 is decomposed in compound location, at least the combined cut face 3 of one-level projection efficiently cuts platform 3, arc convex or oblique protruding 19, outermost one-level cutting face is for efficiently cutting platform 7, inner side is formed with at least combined cut face 3 of one-level step arrangement and efficiently cuts platform 3, the platform 3 of efficiently cutting of projection intersects and is formed with compound secondary sword 15 with compound location decomposition platform 6, cutting face 3 or efficiently cut platform 3 and compound location and decompose platform 6 and intersect and be formed with arc convex or oblique protruding 19, arc convex or oblique protruding 19 has extended to form compound location decomposition platform 6 to efficiently cutting platform 3, on rear cutting face 4, from chisel edge or sharp sword 9, to two outsides, be formed with the stage portion 8 reducing highly gradually, efficiently cut platform 7 and arc convex or oblique protruding 19, decompose platform 6 with compound location, efficiently cut platform 3 and be formed with ladder sword 11 in stair-stepping rear cutting face 4 and stage portion 8, efficient minute cutting blade 21, the recessed sword of side or skew back sword 20, cutting blade 10 is divided in compound location, efficiently cutting platform 7 intersects with compound location decomposition platform 6 through arc convex or oblique protruding 19, be formed with the angle that is more than or equal to 90 °, near center, cutterhead top, it is the top that cutting blade 10 is divided in compound location, efficiently cut platform and intersection, rear cutting face through cutting or grinding flute after form a fillet surface 13, height h between platform 3 is efficiently cut for being more than or equal to 0.01 millimeter in the cutting face 19 of efficiently cutting platform 7 and adjacent inner side, or be less than the bits of discharging after this kind of Tool in Cutting thickness 4/5ths, or be less than the height of the product number of 9 times of the cutting amount of feeding, or the width that cracking resistance is cut platform is for being greater than 0.6 millimeter, be less than or equal on 1/3rd or combined cut face of this tool diameter a groove 22 is set, in compound location, divide and on cutting blade 10, be formed with recess sword 17, or efficiently cut platform 7 with the height h that efficiently cuts platform 3 of adjacent inner side for being more than or equal to 0.01 millimeter, or be less than the bits of discharging after this kind of Tool in Cutting thickness 4/5ths, or be less than the height of the product number of 9 times of the cutting amount of feeding, or the width h ' that cracking resistance is cut platform is for being greater than 0.6 millimeter, be less than or equal to 1/3rd of this tool diameter, efficiently cut platform 7 or efficiently cut platform 3 and intersect with compound location decomposition platform 6 through arc convex or oblique protruding 19, be formed with the angle a that is more than or equal to 90 °, at least one-level groove 22 is set efficiently cutting on platform, intersect and be formed with recess sword with rear cutting face.

According to said structure, due to cutting face 4 after being provided with of the center top bump at cutterhead 1 and stage portion 8 therefore this cutter there is good stability, owing to being provided with, efficiently cut platform 7 again on cutting face 3, make this cutter when cutting, strengthen the outer end cutting edge strength of cutterhead 1, thereby the cutting force that can decompose front cutting edge 14, reduce the frictional strength of front cutting edge 14, frictional heat generation is reduced, can also increase the area of dissipation of cutterhead simultaneously, reduce cutterhead temperature, extended cutter life, and in process, keep high strength always.

According to said structure, because reaming cutterhead partly also adopts substantially identical structure, therefore this species stage centre drill or counterbit and existing common step drill, in efficiency with on service life, all can increase many times on the whole.

Embodiment 9

As Figure 20, shown in Figure 21, the compound sword centre drill of the 9th embodiment of the present invention or compound sword counterbit are at 60 °, 90 °, embodiment on 120 ° of taper shank taper countersinks, first---on the basis of eight embodiments, present embodiment comprises cutterhead, cutterhead is provided with a plurality of cutting blades or cutting cutter hub 2 integratedly, the face towards cutting direction inner side of each cutting blade or cutting cutter hub 2 forms cutting face 7, the face of the axial forward end rear side in cutting face 7 forms secondary cutting face 24, cutting face 7 is intersected and is formed with cutting edge 22 with secondary cutting face 24, inner bulge be formed with combined cutting edges 40, on compound sword centre drill or compound sword counterbit, integratedly, or connect and carry out with forming as one the setting of following technical scheme, the inner side towards direction of rotation front end cutting face 7 at this cutting edge 22, the at least combined cut face 3 of one-level inner side that is provided with through arc convex or oblique protruding 19 stepped projections, or arc convex or oblique protruding 19 extensions that erect, be formed with the compound location crossing with the combined cut face 3 of inner side and decompose platform 6, the cutting face of arranged in step shape is for efficiently cutting platform, the interior cutting edge 23 of cutting edge 22 inner bulge of arranged in step shape or cutting edge 22 are efficient minute cutting blade, the outermost platform of efficiently cutting is that cracking resistance is cut platform 7, outermost efficient minute cutting blade is that cracking resistance is divided cutting blade 22, or arc convex or oblique protruding 19 extends to front end vertically, or extend on cutting edge to rear portion arc, be formed with the recessed sword of side or skew back sword 20, or cracking resistance is cut platform, or efficiently cut platform and arc convex or oblique protruding 19 and intersect, or intersect with the compound decomposition platform extending to form 6 that arc convex or oblique protruding 19 erects, be formed with the angle a that is more than or equal to 90 °, with stair-stepping cutting edge 22, interior cutting edge 23 or front cutting edge 14, the front cutting edge 15 of projection, at front end, be formed with stair-stepping cutting edge 22, interior cutting edge 23, or from the front end of centre drill or counterbit side edge incline direction laterally on cutting face 4, relatively depression is provided with Baltimore groove, or dovetail groove, or square groove, or del groove, or deep-slotted chip breaker, or shaped groove, or cutting face after planar shaped, or cutting face after notch cuttype, or the contextual definition that cracking resistance is cut platform or efficiently cut the height h that efficiently cuts platform that platform is adjacent with inner side is, cracking resistance is cut platform or is efficiently cut platform and the height of efficiently cutting platform of adjacent inner side is that the depth of cut is multiplied by product number, when work piece hardness or viscosity are larger compared with high and cutter, the cutting depth of cut is less, the product number that the depth of cut is taken advantage of is larger, when work piece hardness or viscosity compared with high and cutter hour, the cutting depth of cut is less, the product number that the depth of cut is taken advantage of is larger, when work piece hardness or viscosity are larger compared with low and cutter, the cutting depth of cut is larger, the product number that the depth of cut is taken advantage of is less, when work piece hardness or viscosity compared with low and cutter hour, the cutting depth of cut is larger, the product number that the depth of cut is taken advantage of is less, or the height h of combined cut face that cracking resistance is cut platform and adjacent inner side is for being more than or equal to 0.01 millimeter, or be less than the bits of discharging after this kind of Tool in Cutting thickness 4/5ths, or be less than the height of the product number of 9 times of the cutting amount of feeding, or the width a that cracking resistance is cut platform is for being greater than 0.6 millimeter, or be less than or equal to 1/3rd of this tool diameter, the any one of above structure or be combined formed compound sword centre drill or compound sword counterbit.

According to said structure, due to cutting face 4 after being provided with of the center top bump at cutterhead 1 and stage portion 8 therefore this cutter there is good stability, owing to being provided with, efficiently cut platform 7 again on cutting face 3, make this cutter when cutting, strengthen the outer end cutting edge strength of cutterhead 1, portion 8 so this cutter of effectively having decomposed cutterhead 1 have good stability, owing to being provided with, efficiently cut platform 7 again on cutting face 3, make this cutter when cutting, strengthen the outer end cutting edge strength of cutterhead 1, effectively decomposed cutterhead 1 center drag, strengthened the stability of cutterhead 1, compare with cutter head in the past, increased again a new compound secondary sword 15, can carry out work with two front cutting edges thus, thereby the cutting force that can decompose front cutting edge 14, reduce the frictional strength of front cutting edge 14, frictional heat generation is reduced, can also increase the area of dissipation of cutterhead simultaneously, reduce cutterhead temperature, extended cutter life, and in process, keep high strength always.

According to said structure, provide the cracking resistance arranging on cutterhead 1 and cut width or the height of platform, and the above data of angle are going out through practice, as surpassed this scope, will have a greatly reduced quality in efficiency or service life, this kind of cutter can decompose the cutting force of cutting edge, reduce the frictional strength of cutting edge, increase the area of dissipation of cutterhead, reduce cutterhead temperature, decompose cutting edge stressed of flimsy outer end of cutter, extended cutter life, and in process, keep high strength always.

Although take above and there are a plurality of cutting blades or the cutting compound sword centre drill of cutter hub or compound sword counterbit and be illustrated as example, compound sword technology of the present invention also can be replaced the main body of cutting by the higher alloy cutter head of hardness, both having effectively utilized new invention cutting way makes cutting edge efficiency higher, the advantage that intensity is larger, effectively utilized again the high rigidity of alloy cutter head, the defect of having avoided Integral alloy centre drill or counterbit easily to break, solved workpiece hardness when too high, a difficult problem that is difficult to centering or chamfering, but cutter of the present invention also can have a plurality of cutting blades or cutting cutter hub, each cutting blade or cutting can adopt on cutter hub as described in the structure of embodiment and the combination of other various ways thereof.

Above-described preferred embodiment is illustrative and not restrictive, in the situation that not departing from purport of the present invention and essential characteristic, the present invention can also otherwise implement and specialize, scope of the present invention is limited by claim, and all distortion in claim limited range all fall within the scope of the present invention.

Claims

1. compound sword centre drill or compound sword counterbit, relate generally to centre drill or counterbit for machining, relate to various not with the centre drill that protects cone, various bands protect the centre drill of cone, various arc centre drills, various centre drills, various 90 ° of taper countersinks of Morse taper shank with interchangeable guide pillar, 90 ° of taper countersinks of staight shank of the whole guide pillar of various bands, the various Morse taper shank counterbores with interchangeable guide pillar, the various Mohs staight shank counterbores with interchangeable guide pillar, various 60 °, 90 °, 120 ° of staight shank taper countersinks, various 60 °, 90 °, 120 ° of taper shank taper countersinks, or other various counterbits, or various centre drills, comprise cutterhead, cutterhead is provided with a plurality of cutting blades or cutting cutter hub integratedly, the tooth shape towards cutting direction exterior side of each cutting blade or cutting cutter hub becomes front cutting edge, the face towards direction of rotation at front cutting edge place forms cutting face, the face of the axial forward end rear side in cutting face forms rear cutting face, the crossing cutting edge that is formed with in Yu Hou cutting face, cutting face, it is characterized in that: on compound sword centre drill or compound sword counterbit, integratedly, or connect and carry out with forming as one the setting of following technical scheme, inner side in the cutting face towards direction of rotation of this front cutting edge, the at least combined cut face of one-level inner side that is provided with through arc convex or oblique raised step shape projection, or the extension that erects of arc convex or oblique projection, be formed with the compound location crossing with the combined cut face of inner side and decompose platform, the cutting face of arranged in step shape is for efficiently cutting platform, the cutting edge of arranged in step shape is efficient minute cutting blade, the outermost platform of efficiently cutting is that cracking resistance is cut platform, outermost efficient minute cutting blade is that cracking resistance is divided cutting blade, or arc convex or oblique projection extend to front end vertically, or extend on cutting edge to rear portion arc, be formed with the recessed sword of side or skew back sword, or cracking resistance is cut platform, or efficiently cut platform and compound decomposition platform and intersect, be formed with the angle that is more than or equal to 90 °, or arc convex or oblique projection extend to vertically front end or extend on cutting edge to rear portion arc, be formed with the recessed sword of side or skew back sword, with stair-stepping cutting edge, or from cutting edge to direction of rotation on cutting face, relatively depression is provided with Baltimore groove, or dovetail groove, or square groove, or del groove, or deep-slotted chip breaker, or shaped groove, or cutting face after planar shaped, or cutting face after notch cuttype, or the contextual definition that cracking resistance is cut platform or efficiently cut the height of efficiently cutting platform that platform is adjacent with inner side is, cracking resistance is cut platform or is efficiently cut platform and the height of efficiently cutting platform of adjacent inner side is that the depth of cut is multiplied by product number, when work piece hardness or viscosity are larger compared with high and cutter, the cutting depth of cut is less, the product number that the depth of cut is taken advantage of is larger, when work piece hardness or viscosity compared with high and cutter hour, the cutting depth of cut is less, the product number that the depth of cut is taken advantage of is larger, when work piece hardness or viscosity are larger compared with low and cutter, the cutting depth of cut is larger, the product number that the depth of cut is taken advantage of is less, when work piece hardness or viscosity compared with low and cutter hour, the cutting depth of cut is larger, the product number that the depth of cut is taken advantage of is less, or the height of combined cut face that cracking resistance is cut platform and adjacent inner side is for being more than or equal to 0.01 millimeter, or be less than the bits of discharging after this kind of Tool in Cutting thickness 4/5ths, or be less than the height of the product number of 9 times of the cutting amount of feeding, or the width that cracking resistance is cut platform is for being greater than 0.6 millimeter, or be less than or equal to 1/3rd of this tool diameter, the any one cutting way of above structure, or the formed combination sword of any combination of above cutting way arranges formed compound sword centre drill or compound sword counterbit on centre drill or counterbit.

2. compound sword centre drill or compound sword counterbit, the machine relating generally to for machining adds fluted drill, relate to various not with the centre drill that protects cone, various bands protect the centre drill of cone, various arc centre drills, various centre drills, various 90 ° of taper countersinks of Morse taper shank with interchangeable guide pillar, 90 ° of taper countersinks of staight shank of the whole guide pillar of various bands, the various Morse taper shank counterbores with interchangeable guide pillar, various 60 °, 90 °, 120 ° of staight shank taper countersinks, various 60 °, 90 °, 120 ° of taper shank taper countersinks, or other various counterbits, or various centre drills, comprise cutterhead, cutterhead is provided with a plurality of cutting blades or cutting cutter hub integratedly, the tooth shape towards cutting direction exterior side of each cutting blade or cutting cutter hub becomes front cutting edge, the face towards direction of rotation at front cutting edge place forms cutting face, the face of the axial forward end rear side in cutting face forms rear cutting face, the crossing cutting edge that is formed with in Yu Hou cutting face, cutting face, on compound sword centre drill or compound sword counterbit, integratedly, or connect and carry out with forming as one the setting of following technical scheme, inner side in the cutting face towards direction of rotation of this front cutting edge, the at least combined cut face of one-level inner side that is provided with through arc convex or oblique raised step shape projection, or the extension that erects of arc convex or oblique projection, be formed with the compound location crossing with the combined cut face of inner side and decompose platform, the cutting face of arranged in step shape is for efficiently cutting platform, the cutting edge of arranged in step shape is efficient minute cutting blade, the outermost platform of efficiently cutting is that cracking resistance is cut platform, outermost efficient minute cutting blade is that cracking resistance is divided cutting blade, or arc convex or oblique projection extend to front end vertically, or extend on cutting edge to rear portion arc, be formed with the recessed sword of side or skew back sword, or cracking resistance is cut platform, or efficiently cut platform and compound decomposition platform and intersect, be formed with the angle that is more than or equal to 90 °, or arc convex or oblique projection extend to vertically front end or extend on cutting edge to rear portion arc, be formed with the recessed sword of side or skew back sword, with stair-stepping cutting edge, or from cutting edge to direction of rotation on cutting face, relatively depression is provided with Baltimore groove, or dovetail groove, or square groove, or del groove, or deep-slotted chip breaker, or shaped groove, or cutting face after planar shaped, or cutting face after notch cuttype, or the contextual definition that cracking resistance is cut platform or efficiently cut the height of efficiently cutting platform that platform is adjacent with inner side is, cracking resistance is cut platform or is efficiently cut platform and the height of efficiently cutting platform of adjacent inner side is that the depth of cut is multiplied by product number, when work piece hardness or viscosity are larger compared with high and cutter, the cutting depth of cut is less, the product number that the depth of cut is taken advantage of is larger, when work piece hardness or viscosity compared with high and cutter hour, the cutting depth of cut is less, the product number that the depth of cut is taken advantage of is larger, when work piece hardness or viscosity are larger compared with low and cutter, the cutting depth of cut is larger, the product number that the depth of cut is taken advantage of is less, when work piece hardness or viscosity compared with low and cutter hour, the cutting depth of cut is larger, the product number that the depth of cut is taken advantage of is less, or the height of combined cut face that cracking resistance is cut platform and adjacent inner side is for being more than or equal to 0.01 millimeter, or be less than the bits of discharging after this kind of Tool in Cutting thickness 4/5ths, or be less than the height of the product number of 9 times of the cutting amount of feeding, or the width that cracking resistance is cut platform is for being greater than 0.6 millimeter, or be less than or equal to 1/3rd of this tool diameter, it is characterized in that: or in the cutting face of the axial forward end of centre drill or counterbit, with rear cutting face, intersect, the corner that the cutting edge forming and front cutting edge are crossing, part arranges cracking resistance and cuts platform, and be formed with respectively cracking resistance and cut platform, with the crossing cutting edge in rear cutting face, or local front cutting edge is that cracking resistance is divided cutting blade, the any one cutting way of above structure, or the formed combination sword of any combination of above cutting way arranges formed compound sword centre drill or compound sword counterbit on centre drill or counterbit.

3. compound sword centre drill or compound sword counterbit, the machine relating generally to for machining adds fluted drill, relate to various not with the centre drill that protects cone, various bands protect the centre drill of cone, various arc centre drills, various centre drills, various 90 ° of taper countersinks of Morse taper shank with interchangeable guide pillar, 90 ° of taper countersinks of staight shank of the whole guide pillar of various bands, the various Morse taper shank counterbores with interchangeable guide pillar, various 60 °, 90 °, 120 ° of staight shank taper countersinks, various 60 °, 90 °, 120 ° of taper shank taper countersinks, or other various counterbits, or various centre drills, comprise cutterhead, cutterhead is provided with a plurality of cutting blades or cutting cutter hub integratedly, the tooth shape towards cutting direction exterior side of each cutting blade or cutting cutter hub becomes front cutting edge, the face towards direction of rotation at front cutting edge place forms cutting face, the face of the axial forward end rear side in cutting face forms rear cutting face, the crossing cutting edge that is formed with in Yu Hou cutting face, cutting face, on compound sword centre drill or compound sword counterbit, integratedly, or connect and carry out with forming as one the setting of following technical scheme, inner side in the cutting face towards direction of rotation of this front cutting edge, the at least combined cut face of one-level inner side that is provided with through arc convex or oblique raised step shape projection, or the extension that erects of arc convex or oblique projection, be formed with the compound location crossing with the combined cut face of inner side and decompose platform, the cutting face of arranged in step shape is for efficiently cutting platform, the cutting edge of arranged in step shape is efficient minute cutting blade, the outermost platform of efficiently cutting is that cracking resistance is cut platform, outermost efficient minute cutting blade is that cracking resistance is divided cutting blade, or arc convex or oblique projection extend to front end vertically, or extend on cutting edge to rear portion arc, be formed with the recessed sword of side or skew back sword, or cracking resistance is cut platform, or efficiently cut platform and compound decomposition platform and intersect, be formed with the angle that is more than or equal to 90 °, or arc convex or oblique projection extend to vertically front end or extend on cutting edge to rear portion arc, be formed with the recessed sword of side or skew back sword, with stair-stepping cutting edge, or from cutting edge to direction of rotation on cutting face, relatively depression is provided with Baltimore groove, or dovetail groove, or square groove, or del groove, or deep-slotted chip breaker, or shaped groove, or cutting face after planar shaped, or cutting face after notch cuttype, or the contextual definition that cracking resistance is cut platform or efficiently cut the height of efficiently cutting platform that platform is adjacent with inner side is, cracking resistance is cut platform or is efficiently cut platform and the height of efficiently cutting platform of adjacent inner side is that the depth of cut is multiplied by product number, when work piece hardness or viscosity are larger compared with high and cutter, the cutting depth of cut is less, the product number that the depth of cut is taken advantage of is larger, when work piece hardness or viscosity compared with high and cutter hour, the cutting depth of cut is less, the product number that the depth of cut is taken advantage of is larger, when work piece hardness or viscosity are larger compared with low and cutter, the cutting depth of cut is larger, the product number that the depth of cut is taken advantage of is less, when work piece hardness or viscosity compared with low and cutter hour, the cutting depth of cut is larger, the product number that the depth of cut is taken advantage of is less, or the height of combined cut face that cracking resistance is cut platform and adjacent inner side is for being more than or equal to 0.01 millimeter, or be less than the bits of discharging after this kind of Tool in Cutting thickness 4/5ths, or be less than the height of the product number of 9 times of the cutting amount of feeding, or the width that cracking resistance is cut platform is for being greater than 0.6 millimeter, or be less than or equal to 1/3rd of this tool diameter, or in the cutting face of the axial forward end of centre drill or counterbit, with rear cutting face, intersect, the corner that the cutting edge forming and front cutting edge are crossing, part arranges cracking resistance and cuts platform, and be formed with respectively cracking resistance and cut platform, with the crossing cutting edge in rear cutting face, or local front cutting edge is that cracking resistance is divided cutting blade, it is characterized in that: at least one-level groove is set on combined cut face, the any one cutting way of above structure, or the formed combination sword of any combination of above cutting way arranges formed compound sword centre drill or compound sword counterbit on centre drill or counterbit.

4. compound sword centre drill or compound sword counterbit, the machine relating generally to for machining adds fluted drill, relate to various not with the centre drill that protects cone, various bands protect the centre drill of cone, various arc centre drills, various centre drills, various 90 ° of taper countersinks of Morse taper shank with interchangeable guide pillar, 90 ° of taper countersinks of staight shank of the whole guide pillar of various bands, the various Morse taper shank counterbores with interchangeable guide pillar, various 60 °, 90 °, 120 ° of staight shank taper countersinks, various 60 °, 90 °, 120 ° of taper shank taper countersinks, or other various counterbits, or various centre drills, comprise cutterhead, cutterhead is provided with a plurality of cutting blades or cutting cutter hub integratedly, the tooth shape towards cutting direction exterior side of each cutting blade or cutting cutter hub becomes front cutting edge, the face towards direction of rotation at front cutting edge place forms cutting face, the face of the axial forward end rear side in cutting face forms rear cutting face, the crossing cutting edge that is formed with in Yu Hou cutting face, cutting face, on compound sword centre drill or compound sword counterbit, integratedly, or connect and carry out with forming as one the setting of following technical scheme, inner side in the cutting face towards direction of rotation of this front cutting edge, the at least combined cut face of one-level inner side that is provided with through arc convex or oblique raised step shape projection, or the extension that erects of arc convex or oblique projection, be formed with the compound location crossing with the combined cut face of inner side and decompose platform, the cutting face of arranged in step shape is for efficiently cutting platform, the cutting edge of arranged in step shape is efficient minute cutting blade, the outermost platform of efficiently cutting is that cracking resistance is cut platform, outermost efficient minute cutting blade is that cracking resistance is divided cutting blade, or arc convex or oblique projection extend to front end vertically, or extend on cutting edge to rear portion arc, be formed with the recessed sword of side or skew back sword, or cracking resistance is cut platform, or efficiently cut platform and compound decomposition platform and intersect, be formed with the angle that is more than or equal to 90 °, or arc convex or oblique projection extend to vertically front end or extend on cutting edge to rear portion arc, be formed with the recessed sword of side or skew back sword, with stair-stepping cutting edge, or from cutting edge to direction of rotation on cutting face, relatively depression is provided with Baltimore groove, or dovetail groove, or square groove, or del groove, or deep-slotted chip breaker, or shaped groove, or cutting face after planar shaped, or cutting face after stairstepping, or the contextual definition that cracking resistance is cut platform or efficiently cut the height of efficiently cutting platform that platform is adjacent with inner side is, cracking resistance is cut platform or is efficiently cut platform and the height of efficiently cutting platform of adjacent inner side is that the depth of cut is multiplied by product number, when work piece hardness or viscosity are larger compared with high and cutter, the cutting depth of cut is less, the product number that the depth of cut is taken advantage of is larger, when work piece hardness or viscosity compared with high and cutter hour, the cutting depth of cut is less, the product number that the depth of cut is taken advantage of is larger, when work piece hardness or viscosity are larger compared with low and cutter, the cutting depth of cut is larger, the product number that the depth of cut is taken advantage of is less, when work piece hardness or viscosity compared with low and cutter hour, the cutting depth of cut is larger, the product number that the depth of cut is taken advantage of is less, or the height of combined cut face that cracking resistance is cut platform and adjacent inner side is for being more than or equal to 0.01 millimeter, or be less than the bits of discharging after this kind of Tool in Cutting thickness 4/5ths, or be less than the height of the product number of 9 times of the cutting amount of feeding, or the width that cracking resistance is cut platform is for being greater than 0.6 millimeter, or be less than or equal to 1/3rd of this tool diameter, or in the cutting face of the axial forward end of centre drill or counterbit, with rear cutting face, intersect, the corner that the cutting edge forming and front cutting edge are crossing, part arranges cracking resistance and cuts platform, and be formed with respectively cracking resistance and cut platform, with the crossing cutting edge in rear cutting face, or local front cutting edge is that cracking resistance is divided cutting blade, at least one-level groove is set on combined cut face, it is characterized in that: on the cutting edge of compound sword centre drill or compound sword counterbit, be formed with efficient minute cutting blade, or cutting blade is divided in compound location, or ladder sword, or composite step sword, or recess sword, or compound recess sword, or shaped form cutting edge is curved edge, or compound curved sword, or the formed combination sword of any combination of above cutting way arranges formed compound sword centre drill or compound sword counterbit on centre drill or counterbit.

5. compound sword centre drill or compound sword counterbit as described in as arbitrary in claim 1-4, it is characterized in that: on the apex point of described compound sword centre drill or each cutting blade of compound sword counterbit or cutting cutter hub, from the position of tool axis the direction of front cutting edge toward the outer side, be formed with at least one-level cutting face protrudingly, at least platform is cut in the compound location of one-level, and one-level front cutting edge at least.

6. compound sword centre drill or compound sword counterbit as described in as arbitrary in claim 1-4, it is characterized in that: at described cutting blade or the cutting stair-stepping rear cutting face of at least two-stage of cutter hub and the cutting edge on fillet surface or a centering minute cutting blade, at least one recess sword is set, recess sword is opening, and cutting face or cutting face are extended and amplified the groove that shape distributes backward.

7. compound sword centre drill or compound sword counterbit as described in as arbitrary in claim 1-4, it is characterized in that: at described cutting blade or the cutting Huo Hou cutting face, cutting face of cutter hub and the cutting edge on fillet surface or a centering minute cutting blade, at least one recess sword or compound recess sword are set, recess sword or compound recess sword are opening cutting face or cutting face are extended or amplified shape and extend groove or the compound groove distributing backward.

8. compound sword centre drill or compound sword counterbit as described in as arbitrary in claim 1-4, it is characterized in that: on the cutterhead of described cutter, to run through this cutterhead and to be provided with alloy cutter head or Integral alloy cutterhead with respect to the centrosymmetric mode of end face, the mode that described alloy cutter head or Integral alloy cutterhead start to reduce highly gradually laterally from cutterhead axial centre is formed with one or more levels step.

9. compound sword centre drill or compound sword counterbit as described in as arbitrary in claim 1-4, it is characterized in that: at described centre drill or counterbit, be Integral alloy cutter head, the mode that described alloy cutter head starts to reduce highly gradually laterally from cutterhead axial centre is formed with one or more levels step, and on rear cutting face or cutting face, be formed with stair-stepping cutting edge, or recess sword, or compound recess sword.

10. compound sword centre drill or compound sword counterbit as described in as arbitrary in claim 1-4, it is characterized in that: on the cutterhead of described cutter to run through this cutterhead and to be folded with alloy cutter head with respect to the centrosymmetric mode of end face, the mode that described alloy cutter head starts to reduce highly gradually laterally from cutterhead axial centre is formed with one or more levels step, and is formed with stair-stepping cutting edge on rear cutting face or cutting face.