CN114029532A - Modular drilling machining tool - Google Patents
Modular drilling machining tool Download PDFInfo
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- CN114029532A CN114029532A CN202111517955.0A CN202111517955A CN114029532A CN 114029532 A CN114029532 A CN 114029532A CN 202111517955 A CN202111517955 A CN 202111517955A CN 114029532 A CN114029532 A CN 114029532A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/08—Drills combined with tool parts or tools for performing additional working
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/06—Drills with lubricating or cooling equipment
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Abstract
The invention discloses a modular drilling machining tool, which comprises a central drill bit, an external cutting blade, a cutting split body and a tool body, wherein the cutting split body is butted with the tool body, the central drill bit comprises a drill point and a central connecting rod fixedly connected with the drill point, the drill point is pressed at the front end of the cutting split body, the central connecting rod penetrates through the cutting split body and is fixedly connected with the tool body, a rotation stopping structure for preventing the cutting split body from rotating relative to the tool body is arranged between the cutting split body and the tool body, and the external cutting blade is arranged on the cutting split body and is positioned on the radial outer side of the central drill bit. The center connecting rod is tightly connected with the cutter body, so that the center drill bit, the cutting split body and the cutter body are tightly connected, the cutting split body and the cutter body are detachably connected, when the cutting split body is damaged, only the cutting split body needs to be replaced, the cutter body does not need to be replaced, the cost is greatly reduced, the clamping end of the cutter body and a machine tool do not need to be positioned again, and the precision of clamping the cutter is ensured.
Description
Technical Field
The invention relates to cutting machining, in particular to a modular drilling machining tool.
Background
In order to improve the cutting performance of the cutting tool in drilling, hard alloy and other similar materials are used as raw materials of the cutting tool, and the materials are high in price, high in hardness and good in wear resistance, so that the material cost and the machining cost of the drilling cutting tool are high. The currently used drilling tool is generally assembled by a center drill point and a tool body, wherein the center drill point is made of hard alloy or similar materials with high hardness and wear resistance, the tool body of the clamping part is made of materials with larger elasticity, and the center drill point is replaced by a new center drill point after the center drill point is damaged, so that the use cost of the drilling tool can be reduced. However, the center drill point is generally formed by pressing a die, complex large-size products are easy to deform and crack during sintering and are limited by the production process, and the diameter of a drilling tool adopting the center drill point is generally below 30 mm.
The diameter of a drilling tool can be greatly improved by adopting a central drill point and two external cutting blades to form a cutting unit with a combined edge, but the cutting overhang length (a clamping part tool body) of the drilling tool is required to be more than 10 times of the cutting diameter, the drill point is fixed on the clamping part tool body, the manufacturing cost of the clamping part tool body is high, the cutting precision is difficult to guarantee, the easily damaged area of the clamping part tool body is generally concentrated on the tool body part adjacent to the cutting area, once the tool body part adjacent to the cutting area is damaged, the whole clamping part tool body needs to be replaced, and the cost is increased.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a modular drilling tool, which is characterized in that a cutting part is detachably connected with a tool body, when the cutting part is damaged, only the cutting part needs to be replaced, the tool body does not need to be replaced, the cost is greatly reduced, the clamping end of the tool body and a machine tool do not need to be positioned again, and the clamping precision of the tool is ensured.
In order to solve the technical problems, the invention adopts the following technical scheme:
the modular drilling machining tool comprises a central drill bit, an external cutting blade, a cutting split body and a tool body, wherein the cutting split body is in butt joint with the tool body, the central drill bit comprises a drill point and a central connecting rod fixedly connected with the drill point, the drill point is pressed at the front end of the cutting split body, the central connecting rod penetrates through the cutting split body and is fixedly connected with the tool body, a rotation stopping structure for preventing the cutting split body from rotating relative to the tool body is arranged between the cutting split body and the tool body, and the external cutting blade is installed on the cutting split body and is located on the radial outer side of the central drill bit.
As a further improvement of the technical scheme, the cutting split body is provided with a connecting central hole through which the central connecting rod can pass, the cutter body is provided with a clamping central hole matched with the central connecting rod, the circumferential surface of the cutter body is provided with a fastening hole, a drill bit fastening piece in threaded fit with the fastening hole is arranged in the fastening hole, the fastening hole is communicated with the clamping central hole, and the drill bit fastening piece abuts against the central connecting rod.
As a further improvement of the above technical solution, the fit clearance between the central link and the clamping central hole and the fit clearance between the central link and the connecting central hole are b1 and b2, respectively, and satisfy: b1 is more than or equal to 0.01mm and less than or equal to 0.05mm, and b2 is more than or equal to 0.01mm and less than or equal to 0.05 mm; the radius of the clamping center hole is larger than that of the connecting center hole, the difference value of the two is a, and a is more than or equal to 0mm and less than or equal to 0.005 mm.
As a further improvement of the technical scheme, the circumferential surface of the central connecting rod is provided with a pressing plane, and the drill bit fastening piece abuts against the pressing plane.
As a further improvement of the technical scheme, the tail part of the central connecting rod is provided with an external thread, and the clamping central hole is provided with an internal thread matched with the external thread.
As a further improvement of the above technical solution, the rotation stopping structure includes cutting end face sawteeth provided on the cutting split body and cutter body end face sawteeth provided on the cutter body, and the cutting end face sawteeth and the cutter body end face sawteeth are matched with each other.
As a further improvement of the above technical solution, the cutting split body is provided with a cutting cooling channel which penetrates through the cutter body in the axial direction, the cutter body is provided with a cutter body cooling channel which penetrates through the cutter body in the axial direction, and the cutting cooling channel is communicated with the cutter body cooling channel.
As a further improvement of the above technical solution, the cutter body includes a cutting portion and a clamping shank portion, the cutting division body is butted with the cutting portion, and the cutting division body and the cutting portion are provided with mutually-communicated spiral chip grooves.
As a further improvement of the technical scheme, the cutting split bodies are provided with cutter grooves, the outer cutting blades are installed in the cutter grooves through outer blade fasteners, and the outer cutting blades are multiple and are uniformly arranged along the periphery of the central drill bit.
As a further improvement of the above technical scheme, the cutting split body is provided with a connecting central hole through which the central connecting rod can pass, the cutter body is provided with a clamping central hole, the tail part of the central connecting rod is provided with an external thread, and the clamping central hole is provided with an internal thread which can be matched with the external thread.
Compared with the prior art, the invention has the advantages that:
(1) the modular drilling tool is fixedly connected with the tool body through the central connecting rod, the drill point and the tool body clamp the cutting split bodies, the central drill bit, the cutting split bodies and the tool body are fixedly connected, and the connection is mainly completed through the central connecting rod, so that the connection precision of each part and the assembly precision of the whole tool are ensured, and the dimensional precision of a drilled hole is improved; the central drill bit and the outer cutting blade are arranged on the cutting split bodies to form a drilling and cutting unit, so that the diameter of a drilled hole can be enlarged; because the cutting components of a whole that can function independently, with the cutter body detachable connection, when the cutting components of a whole that can function independently of cutting of neighbouring cutting region damaged, only need to change the cutting components of a whole that can function independently, need not change the cutter body, on the one hand greatly reduced cost, on the other hand because the tip of the afterbody of the cutter body needs certain precision with the lathe cooperation, if change the cutter body, just need fix a position the tip of the cutter body and lathe again, not only troublesome poeration, also difficult to guarantee the precision of clamping at every turn.
(2) According to the modular drilling tool, the rotation stopping structure between the cutting split body and the tool body is the cutting end face sawteeth and the tool body end face sawteeth which are matched with each other, so that the connection stability of the cutting split body on the tool body is enhanced, the circumferential rigidity of the transmission torque transmitted to the cutting split body by the tool body is greatly improved, and the cutting vibration is effectively reduced.
Drawings
Fig. 1 is a perspective exploded view of the modular drilling tool of the present invention.
Fig. 2 is a front view of the modular drilling tool of the present invention.
Fig. 3 is a schematic view of the structure of the cutting segment of the present invention.
Fig. 4 is a view a-a of fig. 2.
Fig. 5 is a view B-B of fig. 2.
Fig. 6 is an end view of the modular drilling tool of the present invention.
The reference numerals in the figures denote:
1. a center drill; 11. drilling a tip; 12. a central link; 121. pressing the plane; 2. cutting the split body; 21. connecting the central hole; 22. cutting a cooling channel; 23. a cutter groove; 3. a cutter body; 31. clamping the central hole; 310. a cutting portion; 32. a fastening hole; 320. clamping the handle; 33. a cutter body cooling channel; 4. an outer cutting blade; 5. a rotation stopping structure; 51. cutting end face sawteeth; 52. saw teeth on the end surface of the cutter body; 6. a drill bit fastener; 7. a spiral chip groove; 8. an outer blade fastener.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples of the specification.
Example 1
As shown in fig. 1 to 6, the modular drilling tool of the present embodiment includes a center drill 1, an outer cutting insert 4, a cutting unit 2 and a tool body 3, wherein the cutting unit 2 is butted against a front end of the tool body 3, and a tail portion of the tool body 3 is a clamping end. The central drill bit 1 comprises a drill tip 11 and a central connecting rod 12 fixedly connected with the drill tip 11, the drill tip 11 is pressed at the front end of the cutting split body 2, the central connecting rod 12 penetrates through the cutting split body 2 to be fixedly connected with the cutter body 3, a rotation stopping structure 5 for preventing the cutting split body 2 from rotating relative to the cutter body 3 is arranged between the cutting split body 2 and the cutter body 3, and an external cutting blade 4 is installed on the cutting split body 2 and is positioned on the radial outer side of the central drill bit 1.
The center drill 1 is positioned at the center of the axis C of the cutting split body 2, and the outer cutting blade 4 is positioned on the end face of the cutting split body 2 and close to the outer edge. The cutting split body 2 is independent and separated from the cutter body 3, is tightly connected with the cutter body 3 through the central connecting rod 12, and the cutting split body 2 is clamped by the drill tip 11 and the cutter body 3, so that the central drill bit 1, the cutting split body 2 and the cutter body 3 are tightly connected, the connection is mainly completed through the central connecting rod 12, the connection precision of all parts and the assembly precision of the whole cutter are ensured, and the size precision of drilling is improved. The center drill 1 and the outer cutting blade 4 are arranged on the cutting split body 2 to form a drilling and cutting unit, so that the drilling diameter can be enlarged. Because the cutting components of a whole that can function independently 2, with the cutter body 3 can dismantle the connection, can install repeatedly on cutter body 3, when the cutting components of a whole that can function independently 2 of neighbouring cutting region damages, only need to change cutting components of a whole that can function independently 2, do not need to change cutter body 3, greatly reduced the cost on the one hand, on the other hand because the tip of the afterbody of cutter body 3 needs certain precision with the lathe cooperation, if change cutter body 3, just need to fix a position with the lathe again to the tip of cutter body 3, not only troublesome poeration, also difficult to guarantee the precision of clamping at every turn.
In this embodiment, the cutting splitting body 2 is provided with a connecting central hole 21 through which the central connecting rod 12 can pass, the cutter body 3 is provided with a clamping central hole 31 matched with the central connecting rod 12, the circumferential surface of the cutter body 3 is provided with a fastening hole 32, a drill fastening piece 6 in threaded fit with the fastening hole 32 is arranged in the fastening hole 32, the fastening hole 32 is communicated with the clamping central hole 31, and the drill fastening piece 6 abuts against the central connecting rod 12. The center link 12 is pressed by the drill bit fastening member 6 in the radial direction within the holding center hole 31, thereby achieving the fastening of the center link 12 to the cutter body 3. The central connecting rod 12 and the connecting central hole 21 are coaxially arranged and are collinear with the axis C of the cutting split body 2, and the axis of the cutter body 3 is the axis C.
The drill bit fastener 6 in this embodiment is preferably a socket head cap screw. In order to improve the compression effect, the circumferential surface of the central connecting rod 12 is provided with a compression plane 121, the bottom of the socket head cap screw is flat, and the flat bottom abuts against the compression plane 121, so that the surface-to-surface contact matching is realized, and the compression effect is further improved. In order to improve the connection stability of the center connecting rod 12, an external thread is provided at the tail of the center connecting rod 12, and an internal thread capable of matching with the external thread is provided at the clamping center hole 31. After the central connecting rod 12 is in threaded fit with the clamping central hole 31, the central connecting rod is tightly pressed by the drill fastening piece 6, so that not only can the thread retraction be prevented, but also the connection strength and stability of the central connecting rod 12 are enhanced, and the cutting stability of the central drill 1 and the external cutting blade 4 is improved. It should be noted that the number of the drill fasteners 6 may be one or more.
In the present embodiment, the connecting center hole 21 is provided with a counter sink at an end surface portion of the cutting division body 2, the drill tip 11 is located in the counter sink, and a tip end of the drill tip 11 protrudes from a front end surface of the cutting division body 2.
In the present embodiment, in order to ensure that the split cutting bodies 2 and the center drill 1 are prevented from loosening and wobbling at the clamping center hole 31 and the coupling center hole 21 when a large cutting force is applied to the split cutting bodies 2 and the center drill 1, and to ensure that the split cutting bodies 2 have sufficient rigidity in the radial direction, the fit clearances between the center link 12 and the clamping center hole 31 and the coupling center hole 21 are b1 and b2, respectively, and satisfy the following requirements: b1 is more than or equal to 0.01mm and less than or equal to 0.05mm, and b2 is more than or equal to 0.01mm and less than or equal to 0.05 mm. The radius of the clamping central hole 31 is larger than that of the connecting central hole 21, the difference between the two is a, and a is more than or equal to 0mm and less than or equal to 0.005 mm.
In this embodiment, the rotation stopping structure 5 includes the cutting end face sawteeth 51 disposed on the cutting split body 2 and the cutter body end face sawteeth 52 disposed on the cutter body 3, the cutting end face sawteeth 51 and the cutter body end face sawteeth 52 are mutually matched, and the matching gap between the two is zero, so as to ensure that the cutting split body 2 has good axial deformation resistance on the cutter body 3. The connection stability of the cutting split body 2 at the cutter body 3 is enhanced by the cutting end face sawteeth 51 and the cutter body end face sawteeth 52, the circumferential rigidity of the transmission torque of the cutting split body 2 is greatly improved by the cutter body 3, and the cutting vibration is effectively reduced.
In this embodiment, the cutting split body 2 is provided with a cutting cooling passage 22 that penetrates in the axial direction, the cutter body 3 is provided with a cutter body cooling passage 33 that penetrates in the axial direction, and the cutting cooling passage 22 is communicated with the cutter body cooling passage 33. Because the cutting components of a whole that can function independently 2 and cutter body 3 only link to each other through the central connecting rod 12 of drill point 11, the terminal surface of cutting components of a whole that can function independently 2 and the terminal surface of cutter body 3 leave a large amount of spaces, therefore the cooling hole quantity on the terminal surface of cutting components of a whole that can function independently 2 and the terminal surface of cutter body 3 can be set up freely, the aperture and the position of the cooling hole also can be set up in a flexible way, have improved the cooling pressure, has strengthened the flow of the coolant liquid, increase the cooling efficiency in the cutter drilling course of working, the great flow is favorable to the chip removal too, have greatly promoted the cutting processability of the cutter. In this embodiment, four cutting cooling channels 22 are provided, and four corresponding cutter body cooling channels 33 are provided, distributed around the periphery of the drill tip 11.
In this embodiment, the cutter body 3 includes a cutting portion 310 at the front end and a holder portion 320 at the rear end, the cutting unit 2 is in abutment with the cutting portion 310 at the front end, and the cutting unit 2 and the cutting portion 310 are provided with spiral flutes 7 that are communicated with each other, that is, the spiral flutes 7 extend from the cutting unit 2 to the cutting portion 310. The clamping handle 320 is a clamping end of the cutter body 3 and is used for clamping with a machine tool.
In this embodiment, the cutting division body 2 is provided with the cutter grooves 23, the outer cutting blades 4 are mounted in the cutter grooves 23 through the outer blade fasteners 8, and the number of the outer cutting blades 4 is two and is uniformly arranged along the periphery of the center drill 1. The two outer cutting inserts 4 are centrosymmetric with respect to the central drill bit 1, i.e. one outer cutting insert 4 is rotated 180 ° to coincide with the other outer cutting insert 4. The outer blade fastening 8 is preferably an outer blade fastening screw. The axis of the outer blade fastener 8 is perpendicular to the axis C of the cutting division 2.
Example 2
The modular drilling tool of the present embodiment differs from embodiment 1 in that:
in this embodiment, the central link 12 is only pressed by the drill bit fastening member 6 in the radial direction in the clamping central hole 31, so that the central link 12 is tightly connected with the cutter body 3, and the tail part of the central link 12 is not provided with an external thread. The center link 12 is inserted only into the clamping center hole 31, and the two are in a thread-free fit relationship. This way it is ensured that the radial angle (i.e. orientation) of the centre bit 1 is adjustable.
The rest parts which are not described are basically the same as the embodiment 1, and are not described again.
Example 3
The modular drilling tool of the present embodiment differs from embodiment 1 in that:
in this embodiment, the central connecting rod 12 is fastened to the cutter body 3 only by the engagement of the external thread of the tail portion with the internal thread of the clamping central hole 31, and the drill bit fastening member 6 is not required.
The rest parts which are not described are basically the same as the embodiment 1, and are not described again.
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 (10)
1. A modular drilling tool, characterized by: the drill bit comprises a central drill bit (1), an outer cutting blade (4), a cutting split body (2) and a cutter body (3), wherein the cutting split body (2) is in butt joint with the cutter body (3), the central drill bit (1) comprises a drill tip (11) and a central connecting rod (12) fixedly connected with the drill tip (11), the drill tip (11) is pressed at the front end of the cutting split body (2), the central connecting rod (12) penetrates through the cutting split body (2) to be fixedly connected with the cutter body (3), a rotation stopping structure (5) for preventing the cutting split body (2) from rotating relative to the cutter body (3) is arranged between the cutting split body (2) and the cutter body (3), and the outer cutting blade (4) is installed on the cutting split body (2) and located on the radial outer side of the central drill bit (1).
2. The modular drilling tool of claim 1, wherein: the cutting split body (2) is provided with a connecting center hole (21) through which the center connecting rod (12) can penetrate, the cutter body (3) is provided with a clamping center hole (31) matched with the center connecting rod (12), a fastening hole (32) is formed in the circumferential surface of the cutter body (3), a drill bit fastening piece (6) in threaded fit with the fastening hole (32) is arranged in the fastening hole (32), the fastening hole (32) is communicated with the clamping center hole (31), and the drill bit fastening piece (6) abuts against the center connecting rod (12).
3. The modular drilling tool of claim 2, wherein: the fit clearance between the central connecting rod (12) and the clamping central hole (31) and the fit clearance between the central connecting rod and the connecting central hole (21) are respectively b1 and b2, and the requirements are as follows: b1 is more than or equal to 0.01mm and less than or equal to 0.05mm, and b2 is more than or equal to 0.01mm and less than or equal to 0.05 mm; the radius of the clamping center hole (31) is larger than that of the connecting center hole (21), the difference between the two is a, and a is more than or equal to 0mm and less than or equal to 0.005 mm.
4. The modular drilling tool of claim 2, wherein: the circumferential surface of the central connecting rod (12) is provided with a pressing plane (121), and the drill bit fastening piece (6) abuts against the pressing plane (121).
5. The modular drilling tool of claim 2, wherein: the tail of the central connecting rod (12) is provided with an external thread, and the clamping central hole (31) is provided with an internal thread matched with the external thread.
6. The modular drilling tool according to any one of claims 1 to 5, characterized in that: the rotation stopping structure (5) comprises cutting end face sawteeth (51) arranged on the cutting split body (2) and cutter body end face sawteeth (52) arranged on the cutter body (3), and the cutting end face sawteeth (51) are matched with the cutter body end face sawteeth (52).
7. The modular drilling tool according to any one of claims 1 to 5, characterized in that: the cutting split body (2) is provided with a cutting cooling channel (22) which penetrates through along the axial direction, the cutter body (3) is provided with a cutter body cooling channel (33) which penetrates through along the axial direction, and the cutting cooling channel (22) is communicated with the cutter body cooling channel (33).
8. The modular drilling tool according to any one of claims 1 to 5, characterized in that: the cutter body (3) comprises a cutting part (310) and a clamping handle part (320), the cutting split body (2) is in butt joint with the cutting part (310), and spiral chip grooves (7) which are communicated with each other are formed in the cutting split body (2) and the cutting part (310).
9. The modular drilling tool according to any one of claims 1 to 5, characterized in that: the cutting split body (2) is provided with a cutter groove (23), the outer cutting blades (4) are installed in the cutter groove (23) through outer blade fasteners (8), and the outer cutting blades (4) are arranged in a plurality and are uniformly distributed along the periphery of the central drill bit (1).
10. The modular drilling tool of claim 1, wherein: the cutting split body (2) is provided with a connecting center hole (21) through which a center connecting rod (12) can penetrate, the cutter body (3) is provided with a clamping center hole (31), the tail portion of the center connecting rod (12) is provided with an external thread, and the clamping center hole (31) is provided with an internal thread matched with the external thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111517955.0A CN114029532A (en) | 2021-12-13 | 2021-12-13 | Modular drilling machining tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111517955.0A CN114029532A (en) | 2021-12-13 | 2021-12-13 | Modular drilling machining tool |
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| Publication Number | Publication Date |
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| CN114029532A true CN114029532A (en) | 2022-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111517955.0A Pending CN114029532A (en) | 2021-12-13 | 2021-12-13 | Modular drilling machining tool |
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| CN (1) | CN114029532A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116213781A (en) * | 2023-05-06 | 2023-06-06 | 太原工具厂有限责任公司 | Indexable shallow hole drill assisting chip removal |
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| CN116213781A (en) * | 2023-05-06 | 2023-06-06 | 太原工具厂有限责任公司 | Indexable shallow hole drill assisting chip removal |
| CN116213781B (en) * | 2023-05-06 | 2023-07-14 | 太原工具厂有限责任公司 | Indexable shallow hole drill assisting chip removal |
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