CN107984005B - An efficient drill bit for processing fiber composite materials - Google Patents
An efficient drill bit for processing fiber composite materialsInfo
- Publication number
- CN107984005B CN107984005B CN201711436865.2A CN201711436865A CN107984005B CN 107984005 B CN107984005 B CN 107984005B CN 201711436865 A CN201711436865 A CN 201711436865A CN 107984005 B CN107984005 B CN 107984005B
- Authority
- CN
- China
- Prior art keywords
- cutting edge
- processing
- fiber composite
- drill bit
- drill
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/02—Twist drills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/009—Stepped drills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2229/00—Details of boring bars or boring heads
- B23B2229/12—Cutting inserts located on different radii
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/28—Arrangement of teeth
- B23B2251/282—Unequal spacing of cutting edges in the circumferential direction
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling Tools (AREA)
Abstract
The invention provides a high-efficiency drill bit for processing a fiber composite material, which comprises a drill tip part, a chip removal part and a handle part, wherein the drill tip part comprises a rake face, a relief face and a chisel edge, the rake face and the relief face are intersected to form a main cutting edge, and the main cutting edge comprises a linear cutting edge and a concave parabolic cutting edge which are connected. The high-efficiency drill bit for processing the fiber composite material provided by the invention has the advantages that the main cutting edge is formed by intersecting the linear cutting edge and the concave parabolic cutting edge, the cutting resistance can be effectively dispersed in the process of processing a product, the axial component force generated in the processing process is reduced, the fiber can be rapidly cut off, and burrs and layering on the processed product are effectively reduced. By adopting the high-efficiency drill bit for processing the fiber composite material, the holes obtained by processing the fiber composite material have high surface roughness precision, have no burrs and layering at the positions, and effectively improve the product qualification rate and the processing efficiency of processing the fiber composite material product.
Description
Technical Field
The invention relates to the technical field of cutting tools, in particular to a high-efficiency drill bit for processing fiber composite materials.
Background
The laminated member formed by the carbon fiber composite material and the titanium alloy material is widely applied to wings and tail rudders of an airplane, and a large number of riveting holes or screw holes are needed in the assembly process of the laminated member. Among these aerospace product-assembling holes, the best process is to simultaneously machine the required rivet holes or screw holes on the carbon fiber composite and titanium alloy material laminate members, which is a main means of ensuring the strength, rigidity and safety of the laminate member product connection.
Drilling is an extremely important process in the assembly and processing technology of carbon fiber composite material parts. Because the carbon fiber composite material is brittle in performance, high in strength, high in hardness, poor in heat conduction capability (the heat conduction coefficient is only 1/10-1/5 of that of austenitic stainless steel), anisotropic and low in interlayer strength, defects such as burning, layering, tearing and burrs of the carbon fiber composite material are easily generated under the action of cutting force during cutting, a drill bit is easy to wear, the quality of a hole is difficult to guarantee, and production efficiency is low. Accordingly, the structure of the drill for processing the carbon fiber composite is further improved.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a high-efficiency drill for processing a fiber composite material, which comprises a drill tip part, a chip removing part and a handle part, wherein the chip removing part is provided with a chip removing groove and a secondary cutting edge which extend from the drill tip part to the handle part in a spiral mode, the drill tip part comprises a front cutter surface, a rear cutter surface and a chisel edge, the front cutter surface and the rear cutter surface intersect to form a main cutting edge, the main cutting edge comprises a linear cutting edge and a concave parabolic cutting edge which are connected, the linear cutting edge is positioned at one end, far away from the handle part, of the drill tip part, and the concave parabolic cutting edge is positioned at one end, close to the handle part, of the drill tip part.
Further, the point angle of the drilling tip is 60-90 degrees.
Further, the chisel edge is N-shaped.
Further, the first relief angle of the main cutting edge is 8-12 degrees, and the second relief angle of the main cutting edge is 24-30 degrees.
Further, the first relief angle of the auxiliary cutting edge is 8-12 degrees, and the second relief angle of the auxiliary cutting edge is 24-30 degrees.
Further, the surfaces of the drill tip and the chip removal part are coated with TiSiAl nanometer composite coatings.
The high-efficiency drill bit for processing the fiber composite material provided by the invention has the advantages that the main cutting edge is formed by intersecting the linear cutting edge and the concave parabolic cutting edge, the cutting resistance can be effectively dispersed in the process of processing a product, the axial component force generated in the processing process is reduced, the fiber can be rapidly cut off, and burrs and layering on the processed product are effectively reduced. By adopting the high-efficiency drill bit for processing the fiber composite material, provided by the invention, the holes obtained by processing the fiber composite material have high surface roughness precision, and the inlet and the outlet of the holes have no burrs and layering phenomena, so that the product qualification rate and the processing efficiency of the fiber composite material product processing are effectively improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic diagram of a high efficiency drill bit for processing fiber composites according to the present invention;
FIG. 2 is a left side view of the drill tip of FIG. 1;
FIG. 3 is an enlarged partial schematic view of portion A of FIG. 1;
FIG. 4 is a cross-sectional view of K-K of FIG. 1;
fig. 5 is a P-P cross-sectional view of fig. 3.
Reference numerals:
10. Rake face 12 and relief face of drill tip 11
13. Chip removing part of main cutting edge 20 of chisel edge 14
21. Shank portion of minor cutting edge 30 of junk slot 22
141. Straight cutting edge 142 concave parabolic cutting edge
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1-5, the embodiment of the invention provides a high-efficiency drill for processing fiber composite materials, which comprises a drill tip 10, a chip removing part 20 and a handle 30, wherein the chip removing part 20 is provided with chip removing grooves 21 and auxiliary cutting edges 22 which extend from the drill tip 10 to the handle 30 in a spiral mode, the drill tip 10 comprises a front cutter surface 11, a rear cutter surface 12 and a chisel edge 13, the front cutter surface 11 and the rear cutter surface 12 intersect to form a main cutting edge 14, the main cutting edge 14 comprises a linear cutting edge 141 and a concave parabolic cutting edge 142 which are connected, the linear cutting edge 141 is positioned at one end of the drill tip 10 away from the handle 30, and the concave parabolic cutting edge 142 is positioned at one end of the drill tip 10 close to the handle 30.
In particular, as shown in fig. 1, the embodiment of the invention provides a high-efficiency drill for processing fiber composite materials, which is integrally made of hard alloy and comprises a drill tip 10, a chip removing part 20 and a shank part 30 which are integrally and coaxially formed, wherein, as shown in fig. 1, the chip removing part 20 is provided with a chip removing groove 21 and a secondary cutting edge 22 which extend from the drill tip 10 to the shank part 30 in a spiral manner, wherein, the chip removing groove 21 is used for discharging cutting chips generated during cutting, the secondary cutting edge 22 is used for trimming the hole wall of a hole made of the drill tip 10 and has a certain guiding function during cutting, and as shown in fig. 4, the first relief angle of the secondary cutting edge 22 is 8-12 degrees, and the second relief angle of the secondary cutting edge 22 is 24-30 degrees.
As shown in fig. 2 and 3, the point angle of the drill tip 10 is 60-90 degrees; the drill tip 10 comprises a rake face 11, a relief face 12 and a chisel edge 13; the chisel edge 13 is located at the drill tip and is N-shaped, the length of the chisel edge 13 in this embodiment is 0.02 times of the diameter of the drill bit, the shorter chisel edge 13 can greatly reduce the axial component force during cutting, reduce defects such as layering, tearing and burrs and the like during processing of a carbon fiber composite material, the main cutting edge 14 is formed by intersecting a rake face 11 and a relief face 12, the main cutting edge 14 comprises a linear cutting edge 141 and a concave parabolic cutting edge 142 which are connected, wherein the linear cutting edge 141 is located at one end of the drill tip 10 far away from the handle 30, the concave parabolic cutting edge 142 is located at one end of the drill tip 10 near the handle 30, one end of the concave parabolic cutting edge 142 far away from the linear cutting edge 141 is intersected with the auxiliary cutting edge 22, the main cutting edge 14 formed by intersecting the linear cutting edge 141 and the concave parabolic cutting edge 142 can effectively disperse cutting resistance during processing of a product, the axial component force generated during processing of the main cutting edge can rapidly cut off fibers, and effectively reduce burrs and layering on the processed product, as shown in fig. 5, the main cutting edge 14 has a first relief angle of 8-12 degrees and a second relief angle of 24 degrees.
The specific working mode of the high-efficiency drill bit for processing the fiber composite material provided by the embodiment of the invention is as follows:
The method comprises a first stage, a second stage, a third stage, a fourth stage, a fifth stage, a third stage, a fifth stage, a secondary cutting edge 22 enters the workpiece, and reaming is started, wherein the third stage is that the axial component force is suddenly reduced when the chisel edge 13 reaches the bottom of the workpiece, layering is easily generated at the outlet of a hole because the chisel edge 13 drills away from the lower surface of the workpiece, the cutting resistance is effectively dispersed in the machining process by the main cutting edge 14 formed by the intersection of the linear cutting edge 141 and the concave parabolic cutting edge 142, the axial component force generated in the machining process is reduced, the axial component force is not suddenly changed after the chisel edge 13 drills away from the lower surface of the workpiece, the layering phenomenon is reduced, and the concave parabolic cutting edge 142 can rapidly cut off fibers, so that burrs on a machined product are effectively prevented from occurring on the main cutting edge 14, and the secondary cutting edge 22 enters the workpiece, and reaming is started.
The high-efficiency drill bit for processing the fiber composite material, which is provided by the embodiment of the invention, is called a drill bit 1, and a commercially available traditional drill bit for the carbon fiber composite material is called a drill bit 2, and hole making tests are carried out on the same carbon fiber composite material, after the hole making is finished, the hole quality of an outlet face is measured by using a super depth of field microscope, and the roughness of a hole wall is measured by using a roughness meter. The comparison results of the drill bit 1 and the drill bit 2 are specifically described as follows:
the drill bit 2 has small burrs and tiny layering when the 1 st hole is machined, the burrs quickly become more along with the increase of the number of holes, layering is also aggravated, and the burrs and layering phenomenon are serious when the 5 th hole is machined, wherein the average roughness value Ra of the first 5 holes machined by the drill bit 2 is more than 0.8 mu m;
The drill bit 1 has no layering and burrs during processing the 1 st hole, the quality is good, the quality is still good during processing the 5 th hole, the hole making experiment is continued, and finally, the drill bit 1 can process at least 20 layering-free and burr-free high-quality holes, and the average roughness value Ra of the first 5 holes processed by the drill bit 1 is less than or equal to 0.48 mu m.
The high-efficiency drill bit for processing the fiber composite material provided by the embodiment of the invention has the advantages that the main cutting edge is formed by intersecting the linear cutting edge and the concave parabolic cutting edge, the cutting resistance can be effectively dispersed in the process of processing a product, the axial component force generated in the process of processing is reduced, the fiber can be rapidly cut off, and burrs and layering on the processed product are effectively reduced. By adopting the high-efficiency drill bit for processing the fiber composite material, disclosed by the embodiment of the invention, the holes obtained by processing the carbon fiber composite material have high surface roughness precision, the inlet of the holes and the outlet of the holes have no burrs and layering phenomena, and the product qualification rate and the processing efficiency of processing the carbon fiber composite material product are effectively improved.
Preferably, the surfaces of the drill tip 10 and the chip removing part 20 are coated with TiSiAl nm composite coating. In the concrete implementation, the surfaces of the drill tip 10 and the chip removing part 20 are coated with a TiSiAl nanometer composite coating, so that the drill has better heat insulation performance and better wear resistance, and the service life of the drill is further prolonged.
Although terms such as drill tip, rake face, relief face, chisel edge, main cutting edge, chip removing portion, chip removing groove, minor cutting edge, shank portion, straight cutting edge, concave parabolic cutting edge, etc. are more used herein, the possibility of using other terms is not precluded. These terms are only used to more conveniently describe and explain the nature of the invention and should be construed in a manner consistent with their spirit and scope.
It should be noted that the above embodiments are merely for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all of the technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present invention.
Claims (3)
1. An efficient drill bit for processing fiber composite materials comprises a drill tip (10), a chip removing part (20) and a handle part (30), wherein the chip removing part (20) is provided with a chip removing groove (21) and a secondary cutting edge (22) which extend from the drill tip (10) to the handle part (30) in a spiral mode, and the efficient drill bit is characterized in that the drill tip (10) comprises a front cutter surface (11), a rear cutter surface (12) and a chisel edge (13), the front cutter surface (11) and the rear cutter surface (12) are intersected to form a main cutting edge (14), the main cutting edge (14) comprises a linear cutting edge (141) and a concave parabolic cutting edge (142) which are connected, the linear cutting edge (141) is positioned at one end, far away from the handle part (30), of the drill tip (10), and the concave parabolic cutting edge (142) is positioned at one end, near the handle part (30), of the concave parabolic cutting edge (142) is far away from the linear cutting edge (141) and is intersected with the secondary cutting edge (22);
the point angle of the drilling tip (10) is 60-90 degrees;
the first relief angle of the main cutting edge (14) is 8-12 degrees, and the second relief angle of the main cutting edge (14) is 24-30 degrees;
The chisel edge (13) is N-shaped, and the length of the chisel edge (13) is 0.02 times of the diameter of the drill bit.
2. A high efficiency drill for processing fiber composite materials as set forth in claim 1, wherein the first relief angle of the secondary cutting edge (22) is 8 DEG to 12 DEG and the second relief angle of the secondary cutting edge (22) is 24 DEG to 30 deg.
3. A high efficiency drill for processing fiber composite materials as set forth in claim 1 wherein surfaces of said drill tip (10) and said chip removal portion (20) are coated with TiSiAl nanometer composite coatings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711436865.2A CN107984005B (en) | 2017-12-26 | 2017-12-26 | An efficient drill bit for processing fiber composite materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711436865.2A CN107984005B (en) | 2017-12-26 | 2017-12-26 | An efficient drill bit for processing fiber composite materials |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107984005A CN107984005A (en) | 2018-05-04 |
| CN107984005B true CN107984005B (en) | 2025-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711436865.2A Active CN107984005B (en) | 2017-12-26 | 2017-12-26 | An efficient drill bit for processing fiber composite materials |
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| CN (1) | CN107984005B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108608040B (en) * | 2018-05-10 | 2020-04-07 | 大连理工大学 | Vertical-edge double-step micro-tooth cutter for high-quality hole making of composite material and laminated structure of composite material |
| DE102019126051A1 (en) * | 2019-09-26 | 2021-04-01 | Kennametal Inc. | Cutting tool |
| CN110605436A (en) * | 2019-10-10 | 2019-12-24 | 中山市德泓科技研究有限公司 | A long-life and high-precision drill reamer |
| CN110860722A (en) * | 2019-10-21 | 2020-03-06 | 广东鼎泰高科精工科技有限公司 | Stepped drill for processing high-temperature alloy |
| CN113798559A (en) * | 2021-10-28 | 2021-12-17 | 蓝鲸科技(深圳)有限公司 | Manual drill bit for processing laminated member of carbon fiber reinforced resin matrix composite and aluminum alloy |
| CN114799288B (en) * | 2022-05-19 | 2024-02-06 | 广东鼎泰高科技术股份有限公司 | Sectional edge drilling tool |
| CN115091549B (en) * | 2022-07-15 | 2024-07-12 | 洛阳双瑞橡塑科技有限公司 | Drill bits and drilling processes based on pultruded composite materials |
| CN116373027B (en) * | 2023-04-10 | 2025-10-31 | 北京理工大学 | Drill bit capable of preventing layering debonding and burr defects |
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| CN201147858Y (en) * | 2006-06-09 | 2008-11-12 | 中国江苏天工工具有限公司 | High-performance powerful twist drill |
| CN202845870U (en) * | 2012-11-12 | 2013-04-03 | 江西杰浩硬质合金工具有限公司 | Drill used for machining carbon fiber reinforced composite materials and titanium alloy laminated plate |
| CN207606322U (en) * | 2017-12-26 | 2018-07-13 | 厦门西威迪新材料技术有限公司 | A kind of high efficiency drill of processing fibrous composite |
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| DE102011078303A1 (en) * | 2011-06-29 | 2013-01-03 | Jürgen Miebach | Drilling bit, particularly auger, comprises circumferential external thread with centering tip lying in drilling axis, main cutting edge, and chip ejection groove helically arranged around core for discharge of drill cuttings |
| CN202861476U (en) * | 2012-11-12 | 2013-04-10 | 江西杰浩硬质合金工具有限公司 | High-efficiency high-precision deep hole drill |
| CN104338977B (en) * | 2013-07-30 | 2018-11-27 | 上海名古屋精密工具股份有限公司 | For carrying out the drill bit of hole machined to fibrous composite |
| CN104999118B (en) * | 2015-07-13 | 2017-05-03 | 大连理工大学 | High-efficiency special drilling head for drilling holes in carbon fiber composite material |
| CN105598509A (en) * | 2016-03-07 | 2016-05-25 | 大连理工大学 | Drill bit special for high-quality drilling of carbon fiber reinforced composite |
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2017
- 2017-12-26 CN CN201711436865.2A patent/CN107984005B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201147858Y (en) * | 2006-06-09 | 2008-11-12 | 中国江苏天工工具有限公司 | High-performance powerful twist drill |
| CN202845870U (en) * | 2012-11-12 | 2013-04-03 | 江西杰浩硬质合金工具有限公司 | Drill used for machining carbon fiber reinforced composite materials and titanium alloy laminated plate |
| CN207606322U (en) * | 2017-12-26 | 2018-07-13 | 厦门西威迪新材料技术有限公司 | A kind of high efficiency drill of processing fibrous composite |
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| Publication number | Publication date |
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| CN107984005A (en) | 2018-05-04 |
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Effective date of registration: 20250909 Address after: 523000 Guangdong Province Dongguan City Chang'an Town Shangsha Zhongnan North Road 66# Building 1 Room 201 Applicant after: Dongguan Jinhe Cutting Technology Co.,Ltd. Country or region after: China Address before: 361100 Fujian Province, Xiamen City, Torch Hi-Tech Industrial Park (Xiang'an) Industry Zone, Qiangye Building, Room 507A Applicant before: XIAMEN CVD NEW MATERIAL TECHNOLOGY CO.,LTD. Country or region before: China |
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