CN218283858U - Step type inner chip removal deep hole drilling tool - Google Patents
Step type inner chip removal deep hole drilling tool Download PDFInfo
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- CN218283858U CN218283858U CN202222946008.XU CN202222946008U CN218283858U CN 218283858 U CN218283858 U CN 218283858U CN 202222946008 U CN202222946008 U CN 202222946008U CN 218283858 U CN218283858 U CN 218283858U
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Abstract
The application relates to a step type inner chip removal deep hole drilling tool, which comprises a tool body, wherein the edge end of the tool body is provided with cutting blades with different functions, the cutting blades are in a step shape, the tool body is connected with a second shaft platform through a first shaft platform, a rectangular thread is arranged on the second shaft platform, a horn-mouth-shaped chip removal groove is formed in the tool body, the chip removal groove is connected with the inside of the tool body in a penetrating manner along the central axis of the tool body, a plurality of supporting and guiding blades are arranged on the tool body, the cutting blade comprises a central cutting blade, a plurality of middle cutting blades and an outer cutting blade, a central cutting blade chip breaker groove is formed in the central cutting blade, a middle cutting blade chip breaker groove is formed in the middle cutting blade, and an outer cutting blade chip breaker groove is formed in the outer cutting blade; the stepped inner chip removal deep hole drill bit can process a plurality of stepped holes through one-time drilling, improves cutting efficiency and ensures aperture quality.
Description
Technical Field
The application relates to the technical field of machining, especially, relate to a chip removal deep hole bores cutter in step.
Background
Deep hole drilling generally refers to a drill used for machining a drill having an aspect ratio, i.e., a ratio of the total length to the hole diameter, of more than 5, and is a very important point in the field of mechanical manufacturing. With the development and progress of the machining industry, the general development trend of cutting machining is high speed, high efficiency, low carbon and environmental protection. In the field of machining, plastic materials such as aluminum alloy and the like are machined, when a long shaft part with a step hole is drilled and the hole diameter is required to be in the precision grade of H8 or above, multiple cutters are usually adopted for machining, such as drill bits, expanding drills, reamers and other machining processes for production and manufacturing, and the defects that the machining efficiency is low and the diameter tolerance and the surface roughness of each step hole cannot be guaranteed and the like due to the fact that multiple cutters need to be replaced in the working process exist;
the prior art needs a plurality of cutters when processing the step hole, has the technical problems of multiple processing steps, unsmooth chip removal, easy scratching of chips, low processing efficiency and the like.
SUMMERY OF THE UTILITY MODEL
The problem that this application was solved lies in providing a chip removal deep hole bores cutter in step, when having solved the processing step hole that prior art exists, need use many cutters, and the processing step is many, and the chip removal is not smooth, and the smear metal is easily hindered, the technical problem of machining efficiency low grade technical problem.
In order to achieve the purpose, the following technical scheme is adopted in the application:
a step type inner chip removal deep hole drilling tool comprises a tool body, wherein cutting blades with different functions are arranged at the cutting edge end of the tool body, the cutting blades are in a step shape, the tool body is connected with a second shaft platform through a first shaft platform, rectangular threads are arranged on the second shaft platform, a horn-mouth-shaped chip removal groove is formed in the tool body and is connected to the inside of the tool body in a penetrating mode along the central axis of the tool body, and a plurality of supporting guide blades are arranged on the tool body;
the cutting blade comprises a central cutting edge, a plurality of middle cutting edges and an outer cutting edge, wherein a central cutting edge chip breaker groove is formed in the central cutting edge, a middle cutting edge chip breaker groove is formed in the middle cutting edge, an outer cutting edge chip breaker groove is formed in the outer cutting edge, and the outer cutting edge chip breaker groove and the outer cutting edge are in a non-through form.
Preferably, the main deflection angle of the central cutting edge is 8-12 degrees, the rake face of the central cutting edge is provided with an arc-shaped central cutting edge chip breaker groove, the arc value is R1.2-R2 mm, the width is 1.5-2.3 mm, the central cutting edge is 0.1-0.2mm lower than the central axis of the cutter body, and the included angle between the auxiliary deflection angle of the central cutting edge and the central axis of the cutter body is 2-6 degrees.
Preferably, the middle cutting edge rake face is provided with a straight circular arc-shaped middle cutting edge chip breaker, the middle cutting edge chip breaker is sequentially connected in a plane and an arc manner along the front-back direction of the cutter body shaft, the cutting plane of the middle cutting edge is parallel to the cutter rake face, the length of the plane is 1.1-1.8mm, the depth is 0.3-0.6 mm, and the arc value is R0.6-0.8 mm.
Preferably, the front cutter face of the external cutting edge is provided with a linear arc-shaped external cutting edge chip breaker groove, the external cutting edge chip breaker grooves are sequentially connected in a plane shape and an arc shape along the front and back directions of the axis of the cutter body, the included angle between the cutting plane of the external cutting edge and the central axis of the cutter body is 10-20 degrees, the plane length is 0.7-1.2mm, and the transition arc value is R0.6-1.0 mm.
Preferably, the number of the supporting and guiding blades is more than 2, the supporting and guiding blades and the cutting blade are welded on the cutter body in an angle of 90 degrees, and the supporting and guiding blades and the secondary edge of the outer cutting edge form a three-point circle.
The beneficial effect of this application is: the step type inner chip removal deep hole drill bit can process a plurality of step holes by one-time drilling, the cutting efficiency is improved, the aperture quality is ensured, each cutting edge is provided with a chip breaker groove with different forms for the cutting edge of the cutter according to different cutting areas, the speed of the outer cutting edge close to the bit line of the cutter tip part is highest during the drilling process, the cutting temperature is higher, the outer cutting edge is made of superhard material PCD with high hardness, high compressive strength, good heat conductivity and good wear resistance through welding post-processing, and the wear resistance of the cutter is further improved;
at least 2 supporting and guiding blades are arranged in the circumferential direction of the cutter body, so that the cutting force is balanced, the aperture straightness and the aperture size are ensured, and the supporting blades are used for extruding the aperture wall in cooperation with the external cutting edge auxiliary blade of the cutter, so that the aperture surface quality of the drilled hole is greatly improved.
Drawings
Fig. 1 is a schematic view of the overall structure of the present application.
Fig. 2 is a front view of the present application.
Fig. 3 is a left side view of the present application.
Fig. 4 is a top view of the present application.
Fig. 5 is a partially enlarged top view of the area a in fig. 4 of the present application.
Illustration of the drawings:
1. a cutter body; 2. a first pillow block; 3. a second spindle base; 5. a rectangular thread; 6. a cutting insert; 7. a center cutting edge; 7-1, a central cutting edge chip breaker groove; 8. a middle cutting edge; 8-1, a middle cutting edge chip breaker groove; 9. an outer cutting edge; 9-1, a cutting edge chip breaker groove is externally cut; 10. a chip groove; 11. supporting the guide blade.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Specific examples are given below.
Referring to fig. 1 to 5, a step type inner chip removal deep hole drilling tool comprises a tool body 1, wherein a cutting blade 6 with different forms of functions is arranged at the edge end of the tool body 1, the tool body 1 is connected with the cutting blade 6 in a welding manner, the cutting blade 6 is in a step shape, a deep hole drilling bit capable of machining a step hole is formed, the tool body 1 is connected with a second shaft platform 3 through a first shaft platform 2, a rectangular thread 5 is arranged on the second shaft platform 3, a horn-mouth-shaped chip removal groove 10 is formed in the tool body 1, the chip removal groove 10 is connected to the inside of the tool body 1 in a penetrating manner along the central axis of the tool body 1, during drilling, high-pressure cutting fluid enters a cutting part of the tool from a gap between the outer circle of a drill rod and the hole wall, and chips and the cutting fluid are simultaneously removed from the center of the drill rod, the supporting and guiding blades 11 and the cutting blade 6 are welded on the cutter body 1 in a 90-degree angle, and form a three-point circle with the auxiliary edge of the outer cutting edge 9, so that self-guiding cutting is formed, the cutting tool has stable cutting force and supporting and extruding functions, the hole diameter precision of a drilled hole is ensured, the supporting and guiding blades 11 are processed with inverted taper from front to back along the axis of the cutter body 1, and the supporting and guiding blades 11 play roles of supporting, extruding, preventing hole diameter eccentricity and stabilizing the cutting force in the drilling process;
the cutting blade 6 comprises a central cutting edge 7, a plurality of middle cutting edges 8 and an external cutting edge 9, a central cutting edge chip breaker groove 7-1 is formed in the central cutting edge 7, a middle cutting edge chip breaker groove 8-1 is formed in the middle cutting edge 8, an external cutting edge chip breaker groove 9-1 is formed in the external cutting edge 9, the external cutting edge chip breaker groove 9-1 and the external cutting edge 9 are in a non-through mode, a 0.2-0.5 mm edge band is reserved close to the excircle side, the secondary edge strength of the outer edge tool tip is further improved, an axial arc relief angle is formed in the grinding mode of the central cutting edge 7 along the axial direction of the step cylinder close to the tool tip, the cutter body 1 is seen along the front and back direction of the axial line, the included angle between the outer edge line of the step cylinder and the central line of the cutter body 1 is 3-6 degrees, so that interference caused during cutting is effectively avoided, and the middle cutting edges 8 are treated in the same way;
the main deflection angle of the central cutting edge 7 is 8-12 degrees, a circular arc-shaped central cutting edge chip breaker groove 7-1 is formed in the front cutter face of the central cutting edge 7, the arc value is R1.2-R2 mm, the width is 1.5-2.3 mm, the central cutting edge 7 is 0.1-0.2mm lower than the central axis of the cutter body 1, the included angle between the auxiliary deflection angle of the central cutting edge 7 and the central axis of the cutter body 1 is 2-6 degrees, a clearance avoiding effect is achieved in the cutting process, and vibration and instability caused in the cutting process are effectively reduced;
a front cutter face of the middle cutting edge 8 is provided with a straight circular arc-shaped middle cutting edge chip breaker groove 8-1, the middle cutting edge chip breaker grooves 8-1 are sequentially connected in a plane and a circular arc manner along the front and back directions of an axis of the cutter body 1, a cutting plane of the middle cutting edge 8 is parallel to the front cutter face of the cutter, the length of the plane is 1.1-1.8mm, the depth of the plane is 0.3-0.6 mm, and the circular arc value of the middle cutting edge is R0.6-0.8 mm;
the PCD blade is selected as the material of the external cutting edge 9, the wear resistance of the cutter is further improved, a linear arc-shaped external cutting edge chip breaker groove 9-1 is formed in the front cutter face of the external cutting edge 9, the external cutting edge chip breaker grooves 9-1 are sequentially connected in a plane and arc shape along the front and back directions of the axis of the cutter body 1, the included angle between the cutting plane of the external cutting edge 9 and the central axis of the cutter body 1 is 10-20 degrees, the plane length is 0.7-1.2mm, and the transition arc value is R0.6-1.0 mm.
During deep hole machining, a cutter body 1 is connected with a drill rod through a rectangular thread 5, a first shaft platform 2 and a second shaft platform 3 play a role in positioning and supporting, and meanwhile concentricity of the cutter body 1 and the drill rod is guaranteed, chips enter the drill rod from a chip groove 10 and are discharged during drilling, so that the chips are prevented from being in frictional contact with the surface of a machined aperture, an auxiliary blade of a superhard PCD blade of an external cutting blade 9 and a supporting and guiding blade 11 form a three-point circle, so that self-guiding cutting is formed, and the supporting, stabilizing and extrusion polishing effects are achieved, so that the drill has a guiding effect, straightness of the deep hole is guaranteed, aperture deviation is effectively prevented, aperture precision and surface roughness are guaranteed, the main failure mode of the deep hole machining cutter is outer blade tip abrasion, the problems of unstable drilling aperture precision and poor surface quality are caused, the external cutting blade 9 is made of superhard PCD materials, and service life of the drill is greatly prolonged.
The step type inner chip removal deep hole drill bit can process a plurality of step holes by one-time drilling, the cutting efficiency is improved, the aperture quality is ensured, each cutting edge is provided with a chip breaker groove in different forms for the cutting edge of the cutter according to different cutting areas, the speed of the outer cutting edge 9 close to the bit line of the tip part of the cutter is the highest during drilling, the cutting temperature is higher, the outer cutting edge is made of superhard PCD materials with high hardness, high compressive strength, good heat conductivity and good wear resistance by welding and post-processing, and the wear resistance of the cutter is further improved;
at least 2 supporting and guiding blades 11 are arranged in the circumferential direction of the cutter body 1, so that the cutting force is balanced, the aperture straightness and the aperture size are ensured, and the supporting blades are used for simultaneously extruding the hole wall in cooperation with the outer cutting edge 9 of the cutter, so that the aperture surface quality of a drilled hole is greatly improved.
The above description is only for the preferred embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the application concepts of the present application in the scope of the present disclosure, and equivalent substitutions and modifications should be included in the scope of the present application.
Claims (5)
1. The step type inner chip removal deep hole drilling tool is characterized by comprising a tool body (1), wherein cutting blades (6) with different forms of functions are arranged at the blade end of the tool body (1), the cutting blades (6) are in a step shape, the tool body (1) is connected with a second shaft platform (3) through a first shaft platform (2), a rectangular thread (5) is arranged on the second shaft platform (3), a horn-mouth-shaped chip removal groove (10) is formed in the tool body (1), the chip removal groove (10) is connected with the inside of the tool body (1) in a penetrating manner along the central axis of the tool body (1), and a plurality of supporting and guiding blades (11) are arranged on the tool body (1);
the cutting blade (6) comprises a central cutting edge (7), a plurality of middle cutting edges (8) and an outer cutting edge (9), a central cutting edge chip breaker groove (7-1) is formed in the central cutting edge (7), a middle cutting edge chip breaker groove (8-1) is formed in the middle cutting edge (8), an outer cutting edge chip breaker groove (9-1) is formed in the outer cutting edge (9), and the outer cutting edge chip breaker groove (9-1) and the outer cutting edge (9) are in a non-through mode.
2. The step type inner chip removal deep hole drilling tool as claimed in claim 1, wherein a major deflection angle of the central cutting edge (7) is 8-12 degrees, a rake face of the central cutting edge (7) is provided with an arc-shaped central cutting edge chip breaker groove (7-1), an arc value is R1.2-R2 mm, a width is 1.5-2.3 mm, the central cutting edge (7) is 0.1-0.2mm lower than a central axis of the tool body (1), and an included angle between a minor deflection angle of the central cutting edge (7) and the central axis of the tool body (1) is 2-6 degrees.
3. The step type inner chip removal deep hole drilling tool as claimed in claim 1, wherein a straight circular arc-shaped intermediate cutting edge chip breaker groove (8-1) is formed in the front tool face of the intermediate cutting edge (8), the intermediate cutting edge chip breaker grooves (8-1) are sequentially connected in a plane and an arc manner along the front and rear directions of the shaft of the tool body (1), the cutting plane of the intermediate cutting edge (8) is parallel to the front tool face of the tool, the length of the plane is 1.1-1.8 mm, the depth is 0.3-0.6 mm, and the arc value is R0.6-0.8 mm.
4. The step type inner chip removal deep hole drilling tool as claimed in claim 1, wherein a straight circular arc-shaped outer cutting edge chip breaker groove (9-1) is formed in the front tool face of the outer cutting edge (9), the outer cutting edge chip breaker grooves (9-1) are sequentially connected in a plane shape and a circular arc shape along the front and back directions of the axis of the tool body (1), the included angle between the cutting plane of the outer cutting edge (9) and the central axis of the tool body (1) is 10-20 degrees, the plane length is 0.7-1.2mm, and the transition circular arc value is R0.6-1.0 mm.
5. A stepped internal chip removal deep hole drill tool according to claim 1, c h a r a c t e r i z e d in that the number of supporting and guiding inserts (11) is greater than 2, the supporting and guiding inserts (11) being welded to the tool body (1) at 90 ° to the cutting insert (6) and forming a three point circle with the minor edge of the outer cutting edge (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222946008.XU CN218283858U (en) | 2022-11-07 | 2022-11-07 | Step type inner chip removal deep hole drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222946008.XU CN218283858U (en) | 2022-11-07 | 2022-11-07 | Step type inner chip removal deep hole drilling tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218283858U true CN218283858U (en) | 2023-01-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222946008.XU Active CN218283858U (en) | 2022-11-07 | 2022-11-07 | Step type inner chip removal deep hole drilling tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218283858U (en) |
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2022
- 2022-11-07 CN CN202222946008.XU patent/CN218283858U/en active Active
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