CN115302319A - Method for remaking drill bit - Google Patents
Method for remaking drill bit Download PDFInfo
- Publication number
- CN115302319A CN115302319A CN202110494716.1A CN202110494716A CN115302319A CN 115302319 A CN115302319 A CN 115302319A CN 202110494716 A CN202110494716 A CN 202110494716A CN 115302319 A CN115302319 A CN 115302319A
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- Prior art keywords
- drill bit
- cutting
- grinding wheel
- machining
- cutting edge
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000005520 cutting process Methods 0.000 claims abstract description 100
- 238000005553 drilling Methods 0.000 claims abstract description 25
- 238000003754 machining Methods 0.000 claims description 36
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000005299 abrasion Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 description 11
- 239000002699 waste material Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 208000035874 Excoriation Diseases 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
- B24B3/24—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of drills
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling Tools (AREA)
Abstract
The invention provides a method for remaking a drill bit, which comprises the following steps: providing a drill bit having a wear region, the drill bit comprising: a handle section; the cutting edge section is arranged at one end of the handle section, the most front end of the cutting edge section is provided with a drilling tip part, any section radius of the drilling tip part is defined as a core thickness, two sides of the drilling tip part obliquely form a first cutting tool face and a second cutting tool face towards the handle section, the first outer periphery of the first cutting tool face and the second outer periphery of the second cutting tool face respectively extend and wind along the outer diameter of the cutting edge section towards the handle section so as to form two spiral side edges, a first chip removal groove and a second chip removal groove, the first cutting tool face is provided with a first cutting edge, and the first cutting edge and the first outer periphery define a wear area; confirming that the processing grinding wheel is aligned to a wear area; and cutting the drill bit by the aligned processing grinding wheel along the spiral side edge or the first chip removal groove so as to grind the wear area of the drill bit.
Description
Technical Field
The present invention relates to a method of manufacturing a drill bit, and more particularly, to a method of remanufacturing a drill bit for use in a drill bit having a worn region.
Background
In the manufacturing process of the printed circuit board, micro drill bits (micro drill bits) are often used for drilling, and the micro drill bits gradually wear in the using process, lose enough drilling cutting force and chip removal capacity, and therefore must be replaced, and the manufacturing cost of the printed circuit board is increased. Furthermore, as the industry demands for precision and quality of drilling, only a small portion of the worn drill bit must be replaced, which is wasteful. On the other hand, in the process of manufacturing the drill, some superscripts may be generated, and compared to the drill with a heavy superscript or scrap grade, the light superscript (i.e. the specification is only slightly out of specification) should be processed and reused to reduce waste. Accordingly, the present invention provides a method for remanufacturing a drill bit having a worn region, which recovers the original cutting and chip removal capabilities of the drill bit and allows the drill bit to be reused in a drilling process, thereby reducing the manufacturing cost and reducing material waste.
Disclosure of Invention
In order to solve the above problems, an object of the present invention is to provide a method for remanufacturing a drill, i.e., a method for remanufacturing a drill, which performs a remanufacturing process on a drill having a worn region to restore the original cutting and chip removal capabilities of the drill, thereby reducing the manufacturing cost and waste.
In order to achieve the above object, an embodiment of the present invention provides a method for remaking a drill bit, which includes the following steps: first, a drill bit having a wear region is provided, the drill bit comprising: a handle section; the blade section is arranged at one end of the handle section, the foremost end of the blade section is provided with a drilling tip part, and the radius of any section of the drilling tip part is defined as the core thickness. The two sides of the drill tip part form a first cutting tool face and a second cutting tool face in an inclined mode towards the direction of the handle part section, the first outer periphery of the first cutting tool face and the second outer periphery of the second cutting tool face respectively extend and revolve along the outer diameter of the blade part section towards the direction of the handle part section to form two spiral side blades, a first chip removal groove and a second chip removal groove, the first cutting tool face is provided with a first cutting edge, and the first cutting edge and the first outer periphery define a wear area; then, confirming that the processing grinding wheel is aligned with the abrasion area, wherein the step of aligning the center of the drill tip to the center of the processing grinding wheel and the step of aligning the first outer periphery to the trimming edge of the processing grinding wheel are included; and cutting the drill bit by the aligned processing grinding wheel along the spiral side edge or the first chip removal groove so as to grind the wear area of the drill bit and recover the cutting force of the drill bit.
Preferably, the wear area further comprises: a primary wear portion at the intersection of the first cutting edge and the first outer periphery; the first secondary abrasion part is positioned on the first cutting edge and extends to the wall surface of the first chip removal groove; and a second minor wear portion which is a portion of the major wear portion extending to the first outer periphery.
Preferably, the machining wheel is aligned with the first minor wear portion to perform cutting operations on the drill bit along the first chip groove.
Preferably, the machining wheel is aligned with the first cutting edge and the first minor wear portion to cut the drill bit along the first chip groove.
Preferably, the working wheel is aligned with the second minor wear portion to perform cutting operations on the drill bit along the helical side edges.
Preferably, the working wheel is aligned with the first minor wear portion and the second minor wear portion, respectively, to perform cutting operations on the drill along the first chip groove and the helical side edge.
Preferably, the length of the grinding wheel cutting the shank section along the helical side edge is 0.2mm to 12.0mm.
Preferably, the length of the machining grinding wheel cutting to the shank section along the first chip removal groove is 0.2 mm-12.0 mm.
Preferably, the step of aligning the center of the drilling tip to the center of the machining grinding wheel further comprises calculating formula 1 to obtain the predetermined depth value:
equation 1: (radius of the machining grinding wheel + core thickness of the drill bit) -distance from the center of the machining grinding wheel to the center of the drill bit.
Preferably, the step of aligning the first outer periphery with the cut edge of the grinding wheel further comprises calculating a distance from an end point of the first cutting edge of the drill bit to the cut edge of the grinding wheel to obtain the predetermined angle.
Compared with the prior art, the invention has the following advantages:
the remaking method of the drill bit can align the processing grinding wheel to the first secondary wear part, the second secondary wear part, the first cutting edge or the combined part of the first secondary wear part and the second secondary wear part on the drill bit to carry out cutting operation, remachine the worn drill bit to recover the original cutting force and chip removal capability, or remachine the drill bit with standard exceeding in the specification in the manufacturing process to enable the drill bit to meet the expected specification, thereby being capable of being used for drilling operation again, reducing the manufacturing cost and avoiding material waste.
Drawings
The following drawings are only intended to illustrate and explain the present invention and do not limit the scope of the present invention. Wherein:
FIG. 1 is a flow chart of a method for remaking a drill bit according to an embodiment of the invention.
FIG. 2 is a schematic view of a drill bit according to an embodiment of the present invention.
FIG. 3 is a top end view of a drill bit configuration according to an embodiment of the present invention.
FIG. 4 is a top end view of a bit configuration showing a wear region according to an embodiment of the present invention.
FIG. 5 is a schematic view of a machining wheel alignment drill according to an embodiment of the present invention.
FIG. 6 is a schematic diagram of a grinding wheel for machining a cutting operation according to an embodiment of the present invention.
FIG. 7 is a schematic diagram of the roughness before and after use of the drill.
FIG. 8 is a schematic view of a machining wheel alignment drill according to an embodiment of the present invention.
FIG. 9 is a schematic view of a machining wheel alignment drill according to another embodiment of the present invention.
FIG. 10 is a schematic view of a machining wheel alignment drill according to yet another embodiment of the present invention.
FIG. 11 is a schematic view of a machining wheel alignment drill according to yet another embodiment of the present invention.
FIG. 12 is a schematic view of a machining wheel alignment drill according to another embodiment of the present invention.
FIG. 13 is a schematic view of the machining length of a drill bit according to an embodiment of the present invention.
The reference numbers illustrate:
s11, S13, S15;
12. a handle section;
14. a blade section;
16. drilling a tip part;
20. a first cutting blade face;
21. a first outer perimeter;
22. a first cutting edge;
201. a first major face;
202. a first knife face;
203. a first edge;
30. a second cutting blade face;
301. a second major face;
302. a second rake face;
303. a second edge;
40. a helical side edge;
41. a first chip discharge groove;
42. a second chip removal groove;
50. a wear area;
51. a main wear portion;
52. a first minor wear portion;
53. a second minor wear portion;
60. 61, the area outside the first secondary wear portion;
100. a drill bit;
200. processing a grinding wheel;
211. processing the center of the grinding wheel;
212. processing the radius of the grinding wheel;
212. an endpoint;
300. a sensor;
A. processing length;
t, core thickness.
Detailed Description
The following detailed description of the embodiments of the invention, taken in conjunction with the accompanying drawings, is provided by way of illustration. The invention is capable of embodiments in addition to those described and of being practiced or being carried out in various ways, all without departing from the scope of the invention. In the description of the specification, numerous specific details are set forth in order to provide a more thorough understanding of the invention; however, the present invention may be practiced without some or all of these specific details. In other instances, well-known steps or elements have not been described in detail so as not to unnecessarily obscure the present invention. The same or similar elements in the drawings will be denoted by the same or similar symbols. It is particularly noted that the drawings are merely schematic and do not represent actual sizes or quantities of elements, and that some of the details may not be fully drawn for clarity of the drawings.
The present invention provides a method for remaking a drill bit, first, a drill bit with a wear area is provided, please refer to step S11 in fig. 1. It should be noted that the spirit of the present invention is to remanufacture a drill bit which has been used and worn so as to restore its cutting ability as much as possible, thereby enabling the drill bit to be reused for drilling work, and the evaluation of the restoration of the cutting ability of the drill bit will be described later. As shown in fig. 2 to 4, the drill bit 100 used in the present invention may include: a shank section 12 and a blade section 14. Wherein the blade section 14 is provided at one end of the shank section 12, and the forwardmost end of the blade section 14 is provided with a drilling tip 16, the radius of any cross section of the drilling tip 16 defining the core thickness T, as shown in fig. 3. The two sides of the drill tip 16 are inclined towards the shank section 12 by the first cutting face 20 and the second cutting face 30, and the first outer periphery 21 of the first cutting face 20 and the second outer periphery 31 of the second cutting face 30 extend and wind along the outer diameter of the blade section 14 towards the shank section 12 to form two spiral side blades 40, a first chip removal groove 41 and a second chip removal groove 42.
In one embodiment, the first cutting insert surface 20 may include a first major surface 201 and a first minor surface 202, and the first major surface 201 is connected to the first minor surface 202 by a first edge 203; the second cutting tool surface 30 may comprise a second major tool surface 301 and a second minor tool surface 302, and the second major tool surface 301 is connected to the second minor tool surface 302 by a second edge 303, as shown in fig. 3. However, the present invention is not limited thereto, and the rework method of the present invention can also be used for a dual-face drill (not shown) or other drill with asymmetric faces (not shown).
Referring to fig. 4, in the process of drilling with the drill, generally, the intersection of the first cutting edge 22 and the first outer periphery 21 is the part mainly contacting and applying force to the hole wall, so these positions are also the parts which are easily worn after the drill is used, and the area worn after drilling with the drill is a wear area 50, which can be defined by the wall surface and the rake surface defined by the first cutting edge 22 and the first outer periphery 21 to define the wear area 50. In one embodiment, the wear region 50 includes a major wear portion 51 located at the intersection of the first cutting edge 22 and the first outer periphery 21; a first minor wear portion 52 which is a wall surface extending to the first chip groove 41 on the first cutting edge 22; and a second minor wear portion 53 which is a portion of the major wear portion 51 extending to the first outer peripheral edge 21.
In FIG. 4, the profile of the bit before wear is shown in dashed lines and the profile of the bit after wear is shown in solid lines. It should be noted that fig. 4 is a schematic view illustrating that the main wear portion 51, the first secondary wear portion 52 and the second secondary wear portion 53 are all completely worn, which is merely an exemplary illustration for convenience of description, and the present invention is not limited thereto, and the drill bit can be reproduced by using the claimed method for reproducing the drill bit in the present invention when at least one of the main wear portion 51, the first secondary wear portion 52 and the second secondary wear portion 53 in the wear area 50 is worn.
It should be noted that the term "wear" as defined herein is not limited to wear or damage after the drill bit is used, but also includes the superstandings with the tool face specifications exceeding the expected standards, that is, the method for remaking the drill bit claimed in the present invention is not limited to the drill bit worn after being used, and can also be applied to the processing and reusing of the superstandings during the manufacturing process of the drill bit. In particular, the out-of-gauge wear zone 50 shown in FIG. 4 is out of gauge, for example, length, thickness, or angle beyond the expected gauge, and is within the scope of the present invention to which the claimed method of remaking a drill bit may be applied.
Next, referring to fig. 5 again, it is confirmed that the machining grinding wheel 200 is aligned with the worn region 50 (step S13 of fig. 1). In detail, the step of verifying the alignment of the machining grinding wheel 200 with the wear zone 50 of the drill must be performed in three directions, including: 1. machining the depth direction of the center of the grinding wheel relative to the center of the drill point part of the drill bit; 2. machining the angular direction of the cut edge of the grinding wheel relative to the outer periphery of the drill bit; and 3, processing the length direction of the grinding wheel relative to the blade section of the drill bit. Referring to fig. 5, the step of aligning the depth direction is to determine whether the depth of the overlap of the grinding wheel and the drill bit meets a predetermined depth value, which is obtained by calculating formula 1:
equation 1: (radius of grinding wheel + core thickness of drill) -distance from center of grinding wheel to center of drill
The step of aligning the angular direction is to confirm whether the angle of the cutting bit of the machining wheel meets a predetermined value of an angle, which is obtained by calculating the distance from the end point 212 of the first outer peripheral edge 21 of the cutting bit away from the first cutting edge 22 to the cutting edge of the machining wheel. Further, the step of aligning the machining length direction is to confirm a predetermined value of the length of the grinding wheel 200 cut from the drill tip 16 of the drill toward the shank section 12. The grinding wheel 200 and the drill 100 are aligned by confirming the predetermined depth value, the predetermined angle value, and the predetermined length value using the sensor 300. It should be noted that the predetermined depth value, the predetermined angle value and the predetermined length value may be in different ranges depending on different considerations, such as requirements, bit size, bit wear, or bit overstepping. For example, the predetermined depth value may be 0.01mm to 3.00mm, the predetermined angle value may be 0 degrees to 360 degrees, and the predetermined length value may be 0.5mm to 12.0mm.
It should be noted that, in the embodiment of the present invention, the sensor 300 is used to determine whether the grinding wheel 200 is aligned with the wear area 50 of the drill, and the alignment operation can be performed by sensing the predetermined depth value, the predetermined angle value and the predetermined length value. However, the invention is not limited thereto, and other methods may be used to align the machining grinding wheel with the drill, for example, an image capturing device may be used to perform the alignment operation.
Next, as shown in fig. 6, the aligned grinding wheel 200 is further subjected to a cutting operation along the spiral side edge 40, the first chip discharge groove 41, or the second chip discharge groove 42 with respect to the drill (step S15 in fig. 1) to grind a worn region of the drill, thereby recovering the cutting force of the drill. In practice, the cutting force of a drill is evaluated by measuring the Roughness of the hole wall (Roughness) in the hole after drilling, and generally, the smaller the Roughness of the hole wall represents the better cutting force of the drill, while the Roughness of the hole wall drilled by the unused drill is smaller than that drilled by the used drill.
Please refer to fig. 7. The roughness of the hole wall drilled by the unused drill is shown in FIG. 7 (A-1), and may be, for example, 5 μm to 10 μm, with the roughness of the drilled hole increasing as the number of drilling operations increases. Once the roughness of the hole wall exceeds the threshold line, it can be judged that the cutting force of the drill is too low and the drill can no longer be used. In general, the roughness threshold may be a range of values as desired, which may be 10 μm to 25 μm, and preferably, may be 25 μm. The roughness of the drilled hole wall (not exceeding the threshold) is represented at (a-2) of fig. 7, for example, the roughness may be 15 μm to 20 μm, and after the drill bit is remade by using the method of the present invention, the roughness of the drilled hole wall may be greatly reduced to (B) of fig. 7, for example, the roughness may be 10 μm to 15 μm, thereby recovering the cutting force of the drill bit and achieving the effect of prolonging the service life of the drill bit.
In one embodiment of the invention, the grinding wheel 200 may be aligned with only the first minor wear portion 52 to perform cutting operations on the drill bit along the first swarf removal channel 41, as shown in fig. 5. However, the present invention is not limited thereto, and the machining grinding wheel 200 may be completely aligned or partially aligned with the first minor worn portion 52 to perform a cutting work, for example, as shown in fig. 8, the shape of the machining grinding wheel may not be identical to the first minor worn portion 52, and thus covers an area 60 other than the first minor worn portion 52 to perform a cutting work. For another example, as shown in FIG. 9, the grinding wheel may be aligned with the first minor wear portion 52 and the first cutting edge 22, thereby covering a region 61 outside the first minor wear portion 52 for cutting operations.
In another embodiment of the invention, the working wheel 200 may be aligned with the second minor wear portion 53 to perform cutting operations on the drill bit along the helical side edges 40, as shown in FIG. 10. In yet another embodiment of the present invention, the grinding wheel 200 may be aligned with the first minor wear portion 52 and the second minor wear portion 53 to cut the drill along the first swarf groove 41 and the helical side edge 40, as shown in fig. 11. According to yet another embodiment of the present invention, the grinding wheel 200 may also be aligned with the entire first outer periphery 21 and the entire first cutting edge 22 to perform cutting operations on the drill bit along the first flutes 41 and the helical side edges 40, as shown in fig. 12. In practice, if only one of the chip removal groove and the helical side edge is worn, only one of the chip removal groove and the helical side edge can be machined. In addition, although not shown, the machining grinding wheel may have different shapes according to requirements, and the optimization of the shortest machining path of the cutting starting point can be determined by analyzing the wear state of the drill.
In one embodiment, the length of the grinding wheel cutting to the shank section along the spiral side edge 40 or the first chip removal groove 41 is 0.2mm to 12.0mm. In particular, the length A may be the length of the cutting extending from the drill tip 16 to the shank section 12, as shown in FIG. 13.
The drill bit remaking method provided by the invention can align the processing grinding wheel to the first secondary wear part, the second secondary wear part, the first cutting edge or the combined part of the first secondary wear part, the second cutting edge and the first cutting edge on the drill bit to carry out cutting operation, remachine the worn drill bit to recover the original cutting force and chip removal capability, or remachine the drill bit with standard exceeding the standard in the manufacturing process to ensure that the drill bit meets the expected standard, thereby being reusable for drilling operation, reducing the manufacturing cost and avoiding material waste.
The above-described embodiments are merely illustrative of the technical spirit and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the present invention, and it is not limited thereto, and it is to be understood that all equivalent variations and modifications according to the spirit of the present invention can be covered by the scope of the present invention.
Claims (10)
1. A method of remaking a drill bit, the method comprising the steps of:
providing a drill bit having a wear region, the drill bit comprising:
a shank section; and
the cutting edge part is arranged at one end of the handle part section, the foremost end of the cutting edge part is provided with a drilling tip part, the radius of any cross section of the drilling tip part is defined as a core thickness, two sides of the drilling tip part face the handle part section direction in an inclined mode to form a first cutting knife face and a second cutting knife face, the first periphery of the first cutting knife face and the second periphery of the second cutting knife face respectively extend and revolve along the outer diameter of the cutting edge part section towards the handle part section direction to form two spiral side edges, a first chip removal groove and a second chip removal groove, the first cutting knife face is provided with a first cutting edge, and the first cutting edge and the first periphery define the abrasion area;
identifying a machining wheel aligned with the wear region, including aligning a center of the drilling tip to a center of the machining wheel and aligning the first outer periphery to a cut edge of the machining wheel; and
and performing a cutting operation on the drill bit along the spiral side edge or the first chip removal groove by using the aligned machining grinding wheel so as to grind the wear area of the drill bit and recover the cutting force of the drill bit.
2. A method of remaking the drill bit as recited in claim 1 wherein the wear region comprises:
a primary wear portion at the intersection of the first cutting edge and the first outer periphery;
a first minor wear portion on the first cutting edge extending to the wall surface of the first chip discharge groove; and
a second minor wear portion that is the portion of the major wear portion extending to the first outer periphery.
3. A method of remaking a drill bit as claimed in claim 2 wherein the machining grindstone is aligned with the first minor wear portion to perform a cutting operation on the drill bit along the first chip groove.
4. A method of remaking a drill bit as claimed in claim 2 wherein the machining grindstone is aligned with the first cutting edge and the first minor wear portion to perform a cutting operation on the drill bit along the first chip groove.
5. A method of remaking a drill bit as claimed in claim 2 wherein the machining grindstone is aligned with the second minor wear portion to perform a cutting operation on the drill bit along the helical side edges.
6. A method of remaking a drill bit as claimed in claim 2 wherein the machining grindstones are aligned with the first minor wear portion and the second minor wear portion respectively to perform a cutting operation on the drill bit along the first chip groove and the helical flank edge.
7. The method of remaking a drill according to claim 1, wherein the length of the grinding wheel cut along the helical side edge into the shank section is 0.2mm to 12.0mm.
8. A method of remaking a drill bit as claimed in claim 1, wherein the length of the cutting of the working grindstone along the first chip groove to the shank section is 0.2mm to 12.0mm.
9. The method of claim 1, wherein the step of aligning the center of the drilling tip to the center of the grinding wheel further comprises calculating a formula 1 to obtain a predetermined depth value,
equation 1: (radius of the machining grinding wheel + core thickness of the drill bit) -distance from the center of the machining grinding wheel to the center of the drill bit.
10. The method of claim 1, wherein said step of aligning said first peripheral edge with said cutting edge of said grinding wheel further comprises calculating a distance of said first peripheral edge of said drill away from an end point of said first cutting edge to said cutting edge of said grinding wheel to obtain a predetermined value of an angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110494716.1A CN115302319A (en) | 2021-05-07 | 2021-05-07 | Method for remaking drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110494716.1A CN115302319A (en) | 2021-05-07 | 2021-05-07 | Method for remaking drill bit |
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| Publication Number | Publication Date |
|---|---|
| CN115302319A true CN115302319A (en) | 2022-11-08 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110494716.1A Pending CN115302319A (en) | 2021-05-07 | 2021-05-07 | Method for remaking drill bit |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000005914A (en) * | 1998-04-20 | 2000-01-11 | Kanex Hamono Kogyo Kk | Drill and its manufacture |
| CN101081483A (en) * | 2007-04-17 | 2007-12-05 | 湖南大学 | Full helicoidal surface Micro-drill web thinning method |
| CN203437705U (en) * | 2013-06-17 | 2014-02-19 | 中国直升机设计研究所 | Drill used for machining stainless steel |
| CN205764068U (en) * | 2016-06-28 | 2016-12-07 | 江苏天工工具有限公司 | A kind of rake face reconditioning fluted drill |
| CN107363301A (en) * | 2017-08-01 | 2017-11-21 | 北京理工大学 | One kind becomes the thick change groove width small hole drilling cutters of core and its grinding method |
| CN209110249U (en) * | 2018-10-18 | 2019-07-16 | 东莞龙仕威精密工具有限公司 | Hard alloy forms gouge bit |
| CN110125461A (en) * | 2018-02-02 | 2019-08-16 | 创国兴业有限公司 | Drill bit structure |
| CN110744108A (en) * | 2019-10-15 | 2020-02-04 | 大连理工大学 | Method for machining drill bit with edge-inclined groove structure for machining composite material |
-
2021
- 2021-05-07 CN CN202110494716.1A patent/CN115302319A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000005914A (en) * | 1998-04-20 | 2000-01-11 | Kanex Hamono Kogyo Kk | Drill and its manufacture |
| CN101081483A (en) * | 2007-04-17 | 2007-12-05 | 湖南大学 | Full helicoidal surface Micro-drill web thinning method |
| CN203437705U (en) * | 2013-06-17 | 2014-02-19 | 中国直升机设计研究所 | Drill used for machining stainless steel |
| CN205764068U (en) * | 2016-06-28 | 2016-12-07 | 江苏天工工具有限公司 | A kind of rake face reconditioning fluted drill |
| CN107363301A (en) * | 2017-08-01 | 2017-11-21 | 北京理工大学 | One kind becomes the thick change groove width small hole drilling cutters of core and its grinding method |
| CN110125461A (en) * | 2018-02-02 | 2019-08-16 | 创国兴业有限公司 | Drill bit structure |
| CN209110249U (en) * | 2018-10-18 | 2019-07-16 | 东莞龙仕威精密工具有限公司 | Hard alloy forms gouge bit |
| CN110744108A (en) * | 2019-10-15 | 2020-02-04 | 大连理工大学 | Method for machining drill bit with edge-inclined groove structure for machining composite material |
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