CN106862618B

CN106862618B - Drilling machining tool

Info

Publication number: CN106862618B
Application number: CN201611262100.7A
Authority: CN
Inventors: 王社权; 江爱胜; 刘敏; 李屏; 汤爱民; 项兴东; 王鹏
Original assignee: Zhuzhou Cemented Carbide Cutting Tools Co Ltd
Current assignee: Zhuzhou Cemented Carbide Cutting Tools Co Ltd
Priority date: 2016-12-30
Filing date: 2016-12-30
Publication date: 2019-12-13
Anticipated expiration: 2036-12-30
Also published as: CN106862618A

Abstract

The invention discloses a drilling machining tool, wherein hole machining blades are arranged in a central groove and a circumferential groove, each hole machining blade comprises a blade body in a quadrilateral plate shape, each blade body is defined by an upper surface, a lower surface and a side surface connecting the upper surface and the lower surface, the upper surface and the side surfaces are intersected to form four identical main cutting edges and four corner cutting edges positioned between the adjacent main cutting edges, each main cutting edge comprises a straight cutting edge and an arc-shaped cutting edge in the upper surface direction, the arc-shaped cutting edges are provided with waveform cutting edges in the side surface direction, the hole machining blades arranged in the central groove are inner blades, the hole machining blades arranged in the circumferential groove are outer blades, the main cutting edges of the inner blades and the main cutting edges of the outer blades are combined to form complete cutting edges for machining holes, and during machining, the waveform cutting edges of the inner blades continuously cut into a workpiece in the central shaft direction of a cutter body, the outer blade cuts into the workpiece intermittently, and the drilling tool has the advantages of stable cutting, small cutting vibration, good quality of the processed surface and the like.

Description

Drilling machining tool

Technical Field

The invention relates to the technical field of metal cutting, in particular to a drilling machining tool.

Background

The cutting end bears cutting force mainly when the drilling tool cuts, the spiral groove and the processing surface form a closed area, chips can only be discharged through the spiral groove from the cutting end, the chips are difficult to remove, in order to guarantee the processing depth of a hole, the cutting end of the drilling tool generally has large overhang, a handle part clamped by the cutting end can generate large deflection when the stress of the cutting end is uneven, meanwhile, the chips and the spiral groove are discharged out of a workpiece when the chips cannot be extreme, the accumulated chips and the spiral groove are formed, the processing surface is severely scraped and extruded, and a cutter body can vibrate due to circumferential stress unbalance, so that the quality of the processing surface is reduced, and the service life of the drilling tool is greatly reduced.

In the prior art, in order to reduce the use cost of the tool, a drilling tool is usually designed into a split structure, an end cutting area is separated from the tool body to form an independent cutting unit, a clamping part forms the tool body independently, the cutting unit can be repeatedly assembled and disassembled on the tool body, the cutting unit consists of an inner blade and an outer blade, the small-diameter central column area and the large-diameter circumferential annular array area of a hole are respectively processed, because the drilling tool requires blind hole processing capability and a group of inner blades and the outer blade is combined and applied to the drilling tool with various different diameters, therefore, the cutting edge of the inner blade is required to be arranged across the central shaft of the tool, the outer blade is arranged close to a processing surface, a complete cutting edge is combined by the inner blade and the outer blade, because the hole processing tool adopts an asymmetric cutting edge structure, the processing areas finished by the inner blade and, therefore, the circumferential stress of the inner blade and the outer blade is difficult to balance, the torque generated during cutting is asymmetric, and deflection deformation and cutting vibration are easy to generate, so that the diameter error of a machined hole is large, and the quality of the machined surface is poor.

The inner cutting blade and the outer cutting blade use the same square blade having a substantially straight edge shape, and since the types of blades can be reduced, a drilling tool equipped with the blades is widely used in the industry. However, with the improvement of cutting speed and cutting feeding requirements, the radial stress difference of the inner and outer cutting blades adopting the linear blade shape is increased, the cutter body is easy to deflect and deform during cutting, so that vibration is aggravated, the surface quality is poor and the consistency of the machining size is poor, meanwhile, as the diameter specifications of the drilling cutter are more, for convenience of use and management, one specification of the blade is required to finish the application of various drilling cutters with different diameters, when the cutting diameter of the cutter is changed through radial movement of the outer cutting blade, the difference of the material removal amount of the inner and outer cutting blades is amplified, the radial stress of the inner and outer cutting blades adopting the linear blade shape structure is difficult to balance, the chip breaking effect is not ideal, and the problems of poor machining surface quality, poor shape and size precision, unsmooth chip removal, large blade cutting performance fluctuation and.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a drilling machining tool with stable cut-in, small cutting vibration and good machining surface quality.

In order to solve the technical problems, the invention adopts the following technical scheme:

A drilling machining tool comprises a tool body, wherein the tool body comprises a handle part, a cutting end part and a peripheral surface positioned between the handle part and the cutting end part, the handle part and the peripheral surface are symmetrical relative to a central shaft of the tool body, the cutting end part is provided with a central groove and a circumferential groove which are communicated with a spiral groove on the peripheral surface, the central groove is adjacent to the central shaft, the circumferential groove is adjacent to the peripheral surface, the central groove and the circumferential groove are both provided with same hole machining blades, each hole machining blade comprises a blade body in a quadrilateral plate shape, the blade body is formed by an upper surface, a lower surface and a side surface connecting the upper surface and the lower surface in a surrounding manner, the upper surface and the side surface are intersected to form four same main cutting edges and four corner cutting edges positioned between the adjacent main cutting edges, the hole machining blades arranged in the central groove are inner blades, and the hole machining blades arranged in the circumferential groove are, the main cutting edge of the inner blade and the main cutting edge of the outer blade are combined to form a complete cutting edge for processing a hole, the main cutting edge is provided with a waveform cutting edge which is in a waveform shape in the side surface direction, during processing, the waveform cutting edge of the inner blade continuously cuts into a workpiece in the central shaft direction of the cutter body, and the waveform cutting edge of the outer blade intermittently cuts into the workpiece.

As a further improvement of the above technical solution:

The main cutting edge comprises a straight cutting edge and an arc-shaped cutting edge which is arc-shaped in the upper surface direction, and the wave crest of the waveform cutting edge is located on the arc-shaped cutting edge.

the rotation of the main cutting edge of the inner insert about the central axis and the main cutting edge of the outer insert produce an overlapping cutting region in which the straight cutting edge of the inner insert contacts the workpiece before the arcuate cutting edge of the outer insert and the smallest preferential distance in the direction of the central axis is d, and satisfies: d is more than or equal to 0.02mm and less than or equal to 0.3 mm.

The waveform cutting edge comprises a plurality of same waveform units, each waveform unit comprises a wave crest, a wave trough and a wave tooth located between the wave crest and the wave trough, and the wave crests and the wave troughs are arc lines in the upper surface direction and are straight lines.

When the waveform cutting edge of the outer blade involved in cutting cuts into the workpiece, the waveform unit intermittently cuts into the workpiece in the direction of the central axis.

Be equipped with between arc cutting edge and the adjacent corner cutting edge sword the sword shape with the third cutting edge that the arc cutting edge is different, the third cutting edge is in the ascending length of main cutting edge extending direction is H, and satisfies: h is more than or equal to 0.2mm and less than or equal to 1.2 mm.

The third cutting edge of the outer insert adjacent the hole machining surface is parallel to the central axis in the direction of rotation of the central axis and the maximum distance between the third cutting edge and the machined hole surface is d1, which is satisfied: d1 is not less than 0.002mm and not more than 0.03 mm.

The included angle between the straight cutting edge on the inner blade participating in cutting the main cutting edge and the plane normal to the central axis in the rotating direction of the central axis is lambda, and the included angle is lambda and should satisfy the following conditions: lambda is more than or equal to 2 degrees and less than or equal to 8 degrees.

The included angle between the straight cutting edge on the main cutting edge of the outer blade and the plane normal to the central axis in the rotating direction of the central axis is omega, and the included angle can satisfy the following conditions: omega is more than or equal to 12 degrees and less than or equal to 24 degrees.

The side include with the major flank that the major cutting edge corresponds and with the cornering face that the cornering cutting edge corresponds, the major flank include respectively with straight line cutting edge, arc cutting edge, the straight flank that the wave form cutting edge corresponds, arc side and ripples side.

The inner blade is in positioning contact with the central groove of the cutter body through the lower surface and the arc side surface, and the outer blade is in positioning contact with the circumferential groove of the cutter body through the lower surface and the arc side surface.

Compared with the prior art, the invention has the advantages that:

The drilling machining tool can meet the requirements of different cutting working conditions of the inner blade and the outer blade only by mounting the hole machining blades of the same specification, the manufacturing difficulty and the inventory of the hole machining blades are greatly reduced, the inner blade and the outer blade are both provided with the waveform cutting edges, in the hole machining process, the waveform cutting edges of the inner blade and the outer blade effectively increase the contact length of the cutting edges and a workpiece in the central shaft direction of the tool body, the cutting force on a unit main cutting edge is reduced, the cutting force is distributed discretely in multiple directions, the radial stress of the drilling machining tool is reduced, the deflection deformation of the tool body of the drilling machining tool is reduced, the requirement on the rigidity of the drilling machining tool is reduced, and the drilling depth of the drilling machining tool is improved; the wave-shaped cutting edge of the inner blade continuously cuts into a workpiece, so that the stress concentration of the main cutting edge of the inner blade is effectively eliminated, the chips of the inner blade are continuously formed and generate the chips with large width, and the chips can be still ensured to be quickly discharged out of the workpiece even if the inner blade has a spiral groove with smaller space and smaller lead angle during cutting. Meanwhile, although the outer blade bears higher material removal amount, the waveform cutting edge of the outer blade is sequentially and intermittently cut into a workpiece and only bears small cutting impact, the groove shape of the waveform cutting edge on the upper surface is accurately designed, so that the width of chips is reduced, the chips are conveniently and rapidly broken and discharged, the situation that the tool bit is broken and chipped due to friction and extrusion of the chips and the processing surface is avoided, the service life of the outer blade is prolonged, the service lives of the outer blade and the inner blade are matched, and the frequency of replacing the hole processing blade is reduced; after the inner blade and the outer blade of the drilling machining tool completely cut into a workpiece, the waveform cutting edge of the outer blade participating in machining forms rotary concave-convex matching with the workpiece at the bottom of a hole, and in the drilling process, the rotary concave-convex matching can play a role in guiding the drilling machining tool in the radial direction and the circumferential direction, so that the vibration of the cutting area of the drilling machining tool can be effectively inhibited and attenuated, the cutting stability is ensured, and the dimensional precision and the surface quality of the machined surface are improved.

Drawings

Fig. 1 is a perspective view of the drilling tool of the present invention.

Fig. 2 is a front view of the drilling tool of the present invention.

Fig. 3 is an enlarged view of a in fig. 2.

fig. 4 is a left side view of the drilling tool of the present invention.

Fig. 5 is a schematic view of the inner and outer inserts of the drilling tool of the present invention on the same diametric plane of the drilling tool.

Fig. 6 is a perspective view of a cutting insert of the drilling tool of the present invention.

Fig. 7 is a front view of a cutting insert of the drilling tool of the present invention.

Fig. 8 is a rear view of the cutting insert of the drilling tool of the present invention.

Fig. 9 is a bottom view of a cutting insert of the drilling tool of the present invention.

The reference numerals in the figures denote:

1. A blade body; 2. an upper surface; 3. a lower surface; 4. a side surface; 41. a major side; 411. a straight side surface; 412. an arc side; 413. a wave-side surface; 42. a corner surface; 5. a main cutting edge; 6. a corner cutting edge; 7. a linear cutting edge; 8. an arc-shaped cutting edge; 9. a wave-shaped cutting edge; 10. a waveform unit; 101. wave crest; 102. a trough of a wave; 103. a wave tooth; 11. a third cutting edge; 20. a cutter body; 21. a handle; 22. cutting the end portion; 23. a peripheral surface; 24. a central shaft; 25. a helical groove; 26. a central slot; 27. a circumferential groove; 28. an internal cooling hole; 31. an inner blade; 32. an outer blade.

Detailed Description

The invention will be described in further detail below with reference to the drawings and specific examples.

fig. 1 to 9 show an embodiment of the drilling tool of the present invention, which comprises a tool body 20, the tool body 20 comprises a shank 21, a cutting end 22 and a peripheral surface 23 between the shank 21 and the cutting end 22, the shank 21 and the peripheral surface 23 are symmetrical with respect to a central axis 24 of the tool body 20, the cutting end 22 is provided with a central groove 26 and a peripheral groove 27 communicating with a spiral groove 25 on the peripheral surface 23, the central groove 26 is arranged adjacent to the central axis 24, the peripheral groove 27 is arranged adjacent to the peripheral surface 23, the central groove 26 and the peripheral groove 27 are both provided with identical hole-machining inserts, the hole-machining inserts comprise an insert body 1 in a quadrangular plate shape, the insert body 1 is surrounded by an upper surface 2, a lower surface 3 and a side surface 4 connecting the upper surface 2 and the lower surface 3, the upper surface 2 and the side surface 4 intersect to form four identical main cutting edges 5 and four corner cutting edges 6 between adjacent main cutting edges 5, the hole machining blade arranged in the central groove 26 is an inner blade 31, the hole machining blade arranged in the circumferential groove 27 is an outer blade 32, the main cutting edge 5 of the inner blade 31 and the main cutting edge 5 of the outer blade 32 are combined to form a complete cutting edge for machining a hole, the main cutting edge 5 is provided with a waveform cutting edge 9 which is in a waveform shape in the direction of the side surface 4, when in machining, in the direction of the central shaft 24 of the cutter body 20, the waveform cutting edge 9 of the inner blade 31 continuously cuts into a workpiece, and the waveform cutting edge 9 of the outer blade 32 intermittently cuts into the workpiece, the drilling machining cutter of the embodiment can meet the requirements of different cutting working conditions of the inner blade 31 and the outer blade 32 only by installing hole machining blades of the same specification, the manufacturing difficulty and the stock of the hole machining blades are greatly reduced, the waveform cutting edges 9 are arranged on the inner blade 31 and the outer blade 32, in the hole machining process, in the, the waveform cutting edges 9 of the inner blade 31 and the outer blade 32 effectively increase the contact length between the cutting edges and a workpiece, reduce the cutting force on the main cutting edge 5 with unit length, and the cutting force is distributed discretely in a plurality of directions, so that the radial stress of the drilling tool is reduced, the deflection deformation of the body of the drilling tool is reduced, the requirement on the rigidity of the drilling tool is reduced, and the drilling depth of the drilling tool is improved; the waveform cutting edge 9 of the inner blade 31 continuously cuts into the workpiece, so that the stress concentration of the main cutting edge of the inner blade is effectively eliminated, the chips of the inner blade 31 are continuously formed and large-width chips are generated, and even when the inner blade 31 cuts a spiral groove with a smaller space and a smaller lead angle, the chips can be still quickly discharged out of the workpiece; meanwhile, although the outer blade 32 bears higher material removal amount, the waveform cutting edge 9 of the outer blade 32 is orderly and intermittently cut into the workpiece and only bears small cutting impact, the groove shape of the waveform cutting edge 9 on the upper surface 2 is accurately designed, the width of the chips is reduced, the chips are conveniently and rapidly broken and discharged, the tool bit breakage caused by friction and extrusion of the chips and the processing surface is avoided, the service life of the outer blade 32 is prolonged, the service lives of the outer blade 32 and the inner blade 31 are matched, and the frequency of replacing the hole processing blade is reduced; after the inner blade 31 and the outer blade 32 of the drilling machining tool completely cut into a workpiece, the outer blade 32 participates in the machining of the waveform cutting edge 9, and the bottom of a hole and the workpiece form rotary concave-convex matching, in the drilling process, the rotary concave-convex matching can play a role in guiding the drilling machining tool in two radial and circumferential directions, the generation of vibration of the cutting area of the drilling machining tool can be effectively inhibited and attenuated, the cutting stability is ensured, and the machining surface size precision and the surface quality are improved.

In this embodiment, main cutting edge 5 includes sharp cutting edge 7 and is curved arc cutting edge 8 in 2 directions on the upper surface, and wave form cutting edge 9 sets up on arc cutting edge 8, and sharp cutting edge 7 can guarantee the stability when the spot facing work piece cuts into the work piece, and the crest of wave form cutting edge 9 all is located arc cutting edge 8, and wave form cutting edge 9 takes place the law along arc cutting edge 8 and changes promptly.

The rotation of the main cutting edge 5 of the inner insert 31 about the central axis 24 and the main cutting edge 5 of the outer insert 32 produce an overlapping cutting region in which the straight cutting edge 7 of the inner insert 31 contacts the workpiece before the curved cutting edge 8 of the outer insert 32 and the smallest preferential distance in the direction of the central axis 24 is d, which should be satisfied in order to ensure that the cutting-in process of the hole is completed substantially simultaneously with the wave-shaped cutting edge 9 of the inner insert 31 and the wave-shaped cutting edge of the inner insert 31: d is more than or equal to 0.02mm and less than or equal to 0.3mm, and in the embodiment, d =0.25 mm.

In this embodiment, the waveform cutting edge 9 is provided with a plurality of identical waveform elements 10, the waveform elements 10 comprise a peak 101, a trough 102 and a wave tooth 103 positioned between the peak 101 and the trough 102, in the direction of the upper surface 2, the wave crest 101 and the wave trough 102 are circular arc lines, the wave teeth 103 are straight lines, when the same hole machining blade is applied to drilling machining tools with different diameters, only the outer blade needs to move in the radial direction of the drilling machining tool, i.e. the number of wave-shaped units 10 participating in cutting by the wave-shaped cutting edge 9 of the outer blade 32 is changed accordingly, and the wave crests 101, wave troughs 102 and wave teeth 103 of the wave units 10 of the wave cutting edges 9 are basically balanced in the radial direction of the drilling tool, even if the diameter of the drilling tool changes, the radial stress balance of the outer blade 32 does not change, so that the drilling tool has stable performance, and the hole has good size consistency and surface quality.

In this embodiment, when the wavy cutting edge 9 of the outer blade 32 involved in cutting cuts into the workpiece, the wavy element 10 cuts into the workpiece intermittently in the direction of the center axis 24.

In order to further improve the quality of the processed surface and reduce the cutting vibration, a third cutting edge 11 with an edge shape different from that of the arc-shaped cutting edge 8 is arranged between the arc-shaped cutting edge 8 and the adjacent corner cutting edge 6, the length of the third cutting edge 11 in the extending direction of the main cutting edge 5 is H, and the requirements are that: h is more than or equal to 0.2mm and less than or equal to 1.2mm, the third cutting edge 11 of the outer blade 32 adjacent to the hole machining surface is parallel to the central shaft 24 in the rotating direction of the central shaft 24, and the maximum distance between the third cutting edge 11 and the hole machining surface is d1, which should satisfy: d1 is not less than 0.002mm and not more than 0.03 mm. In this example, d1=0.01 mm.

In order to ensure smooth cut when the inner blade 31 and the outer blade 32 are added into a workpiece, the included angle between the linear cutting edge 7 of the inner blade 31 participating in cutting on the main cutting edge 5 of the drilling tool in the rotating direction of the central shaft 24 and the plane normal to the central shaft 24 is lambda, the included angle between the linear cutting edge 7 of the outer blade 32 participating in cutting on the main cutting edge 5 in the rotating direction of the central shaft 24 and the plane normal to the central shaft 24 is omega, and the following requirements are met: λ is 2 ° ≦ λ ≦ 8 °, ω is 12 ° ≦ ω ≦ 24 °, in this example, λ =6 °, ω =18 °.

In the present embodiment, the side surface 4 includes a main side surface 41 corresponding to the main cutting edge 5 and a corner surface 42 corresponding to the corner cutting edge 6, the main side surface 41 includes a straight side surface 411, an arc side surface 412 and a wave side surface 413 corresponding to the straight cutting edge 7, the arc cutting edge 8 and the wave cutting edge 9, respectively, the inner insert 31 is positioned and contacted with the central groove 26 of the cutter body 20 through the lower surface 3, the arc side surface 412, the outer insert 32 is positioned and contacted with the circumferential groove 27 of the cutter body 20 through the lower surface 3, the arc side surface 412, the relief surface arc side surface 412 of the arc cutting edge 8 of the main cutting edge 5 is a plane, the first relief surface of the wave cutting edge 9 of the arc cutting edge 8 is the wave side surface 413, the second relief surface is the arc side surface 412, the arc side surface 412 and the wave side surface 413 are all provided with a constant relief angle, the larger stable arc cutting edge 8 and the cutting performance of the wave cutting edge 9 are ensured, The positioning surface of the outer blade 32 is a plane, so that the positioning precision is ensured.

In this embodiment, two inner cooling holes 28 are formed in the cutter body 20 substantially parallel to the helical groove 25, and the cooling medium flows from the shank 22 of the cutter body 20 to the main cutting edges 5 of the inner blade 31 and the outer blade 31 of the cutting end portion 23, respectively.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.

Claims

1. A drilling machining tool comprises a tool body (20), wherein the tool body (20) comprises a handle portion (21), a cutting end portion (22) and a peripheral surface (23) located between the handle portion (21) and the cutting end portion (22), the handle portion (21) and the peripheral surface (23) are symmetrical relative to a central shaft (24) of the tool body (20), a central groove (26) and a peripheral groove (27) which are communicated with a spiral groove (25) in the peripheral surface (23) are arranged on the cutting end portion (22), the central groove (26) is arranged close to the central shaft (24), the peripheral groove (27) is arranged close to the peripheral surface (23), the same hole machining blades are arranged in the central groove (26) and the peripheral groove (27) respectively, each hole machining blade comprises a blade body (1) in a quadrilateral plate shape, and the blade body (1) is formed by an upper surface (2), a lower surface (3) and a side surface (4) which is connected with the upper surface (2) and the lower surface (3), upper surface (2) and side (4) are crossing forms four the same main cutting edge (5) and are located four corner cutting edge (6) between adjacent main cutting edge (5), install hole machining blade in central groove (26) is interior blade (31), installs the hole machining blade of circumference groove (27) is outer blade (32), the main cutting edge (5) of interior blade (31) with main cutting edge (5) combination of outer blade (32) form the complete cutting edge that is used for the processing hole, its characterized in that: be equipped with on main cutting edge (5) and be waved wave form cutting edge (9) in side (4) direction, during processing, in center pin (24) direction of cutter body (20), the work piece is cut into in succession in wave form cutting edge (9) of inner blade (31), work piece is cut into in succession in wave form cutting edge (9) of outer blade (32), main cutting edge (5) include straight line cutting edge (7) and be curved arc cutting edge (8) in upper surface (2) direction, wave crest (101) of wave form cutting edge (9) all are located on arc cutting edge (8), side (4) include with main side (41) that main cutting edge (5) correspond and with corner face (42) that corner cutting edge (6) correspond, main side (41) including respectively with straight line cutting edge (7), arc cutting edge (8), The inner blade (31) is in positioning contact with a central groove (26) of the cutter body (20) through a lower surface (3), an arc side surface (412), the outer blade (32) is in positioning contact with a circumferential groove (27) of the cutter body (20) through the lower surface (3), the arc side surface (412), a rear corner surface arc side surface (412) of an arc cutting edge (8) of the main cutting edge (5) is a plane, a first rear corner surface of the waveform cutting edge (9) of the arc cutting edge (8) is the wave side surface (413), a second rear corner surface is the arc side surface (412), and the arc side surface (412) and the wave side surface (413) are all provided with constant rear angles.

2. The drilling machining tool of claim 1, wherein: rotation of the main cutting edge (5) of the inner insert (31) about the central axis (24) and the main cutting edge (5) of the outer insert (32) produce an overlapping cutting region in which the straight cutting edge (7) of the inner insert (31) contacts the workpiece before the curved cutting edge (8) of the outer insert (32) and the smallest preferential distance in the direction of the central axis (24) is d, and satisfies: d is more than or equal to 0.02mm and less than or equal to 0.3 mm.

3. the drilling machining tool of claim 1, wherein: the waveform cutting edge (9) comprises a plurality of same waveform units (10), each waveform unit (10) comprises a peak (101), a trough (102) and a wave tooth (103) located between the peak (101) and the trough (102), the peaks (101) and the troughs (102) are arc lines in the direction of the upper surface (2), and the wave teeth (103) are straight lines.

4. The drilling machining tool of claim 3, wherein: when the wave-shaped cutting edge (9) of the outer blade (32) participating in cutting cuts into the workpiece, the wave-shaped unit (10) cuts into the workpiece intermittently in the direction of the central axis (24).

5. The drilling machining tool of claim 1 or 2, characterized in that: be equipped with between arc cutting edge (8) and adjacent corner cutting edge (6) sword shape with third cutting edge (11) that arc cutting edge (8) are different, third cutting edge (11) are in main cutting edge (5) length in the extending direction is H, and satisfies: h is more than or equal to 0.2mm and less than or equal to 1.2 mm.

6. The drilling machining tool of claim 5, wherein: the third cutting edge (11) of the outer insert (32) adjacent the hole machining surface is parallel to the central axis (24) in the direction of rotation of the central axis (24), and the maximum distance between the third cutting edge (11) and the machined hole surface is d1, which is satisfied: d1 is not less than 0.002mm and not more than 0.03 mm.

7. The drilling machining tool of claim 1 or 2, characterized in that: the included angle between the straight cutting edge (7) on the inner blade (31) participating in cutting the main cutting edge (5) and the plane normal to the central axis (24) in the rotating direction of the central axis (24) is lambda, and the included angle is defined as follows: lambda is more than or equal to 2 degrees and less than or equal to 8 degrees.

8. The drilling machining tool of claim 1 or 2, characterized in that: the included angle between the straight cutting edge (7) on the outer blade (32) participating in cutting the main cutting edge (5) and the plane normal to the central axis (24) in the rotating direction of the central axis (24) is omega, and the included angle is satisfied: omega is more than or equal to 12 degrees and less than or equal to 24 degrees.

9. The drilling machining tool of claim 1 or 2, characterized in that: the inner blade (31) is in positioning contact with a central groove (26) of the cutter body (20) through the lower surface (3), the arc side surfaces (412), and the outer blade (32) is in positioning contact with a circumferential groove (27) of the cutter body (20) through the lower surface (3), the arc side surfaces (412).