CN220882641U - Coarse and fine integrated cutter for drilling slotted holes - Google Patents
Coarse and fine integrated cutter for drilling slotted holes Download PDFInfo
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- CN220882641U CN220882641U CN202322415850.5U CN202322415850U CN220882641U CN 220882641 U CN220882641 U CN 220882641U CN 202322415850 U CN202322415850 U CN 202322415850U CN 220882641 U CN220882641 U CN 220882641U
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- 238000005553 drilling Methods 0.000 title claims abstract description 31
- 230000002093 peripheral effect Effects 0.000 claims abstract description 110
- 238000003754 machining Methods 0.000 abstract description 16
- 238000000034 method Methods 0.000 description 5
- 238000009966 trimming Methods 0.000 description 4
- 230000007704 transition Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Drilling Tools (AREA)
Abstract
The utility model discloses a rough and fine integrated slot drilling tool which comprises a tool shank part and a tool bit part, wherein the tool bit part is provided with a first chip groove, a second chip groove, a first rake face, a second rake face, a first main cutting edge, a second main cutting edge, a first tool edge and a second tool edge, the first tool edge forms a first peripheral edge on the tool bit part, and the first peripheral edge is provided with a first peripheral edge rake angle and a first peripheral edge relief angle; the second cutter edge forms a second peripheral edge on the cutter head part, and the second peripheral edge is provided with a second peripheral edge rake angle and a second peripheral edge relief angle; the included angle between the first main cutting edge and the central shaft of the tool handle part forms a first point angle, the included angle between the second main cutting edge and the central shaft of the tool handle part forms a second point angle, the first point angle is larger than the second point angle, and the first peripheral edge rake angle is larger than the second peripheral edge rake angle and the second peripheral edge relief angle; the first peripheral edge relief angle is greater than the second peripheral edge relief angle and the second peripheral edge relief angle. The cutter can be used for rough machining and finishing to improve the situation of deformation of a slotted hole and burrs and improve drilling quality.
Description
Technical Field
The utility model relates to the technical field of PCB drilling tools, in particular to a tool for drilling slot holes integrally with coarse and fine.
Background
In slot machining of a Printed Circuit Board (PCB), an EA slot cutter with an integrated drilling and milling mode is often adopted, the used slot cutter is provided with a cutter body and a cutter handle, the front end of the cutter body is provided with a drill point, in the drilling process, the most serious abrasion part of the drill bit cutter is the intersection part of a peripheral edge and the drill point angle, and all cutting stresses are concentrated. As shown in fig. 1-3, the current drill tool generally comprises a tool shank 100 and a tool body 200, wherein two main tool faces 210 of the tool body 200 have the same shape and the same point angle, and when actually drilling a slot, the slot may be deformed, and the surface of the slot has burrs, so that the requirement of customers on the quality of the slot is not met.
Disclosure of utility model
In view of the above, in order to solve the technical problems of deformation and burr of the slot hole of the current drilling tool, the utility model aims to provide a tool for coarse and fine integrated slot hole drilling, which can be used for coarse machining and fine trimming, so as to improve the situation of deformation and burr of the slot hole and improve the drilling quality.
In order to achieve the above purpose, the utility model provides a rough and fine integrated slot drilling tool, which comprises a tool shank and a tool bit part connected with the tool shank, wherein the tool bit part is in a spiral structure and is provided with a first chip groove and a second chip groove, one end of the tool bit part, which is far away from the tool shank, is provided with a first rake face and a second rake face, the first rake face is intersected with the first chip groove to form a first main cutting edge, the first rake face is intersected with the tool bit part in the circumferential direction to form a first tool edge, the first tool edge forms a first peripheral edge on the tool bit part along the spiral extending direction of the first chip groove, and the first peripheral edge is provided with a first peripheral edge rake angle and a first peripheral edge relief angle;
The second rake face and the second chip groove are intersected to form a second main cutting edge, the second rake face and the cutter head are circumferentially intersected to form a second cutter edge, a second peripheral edge is formed on the cutter head along the spiral extension direction of the second chip groove, and the second peripheral edge is provided with a second peripheral edge rake angle and a second peripheral edge relief angle;
The included angle between the first main cutting edge and the central shaft of the tool handle part forms a first point angle, the included angle between the second main cutting edge and the central shaft of the tool handle part forms a second point angle, and the first point angle is larger than the second point angle; the first peripheral edge rake angle is greater than the second peripheral edge rake angle and also greater than the second peripheral edge relief angle; the first peripheral edge relief angle is greater than the second peripheral edge relief angle and is also greater than the second peripheral edge relief angle.
Compared with the prior art, the rough and fine integrated slot hole drilling tool has the advantages that the first point angle and the second point angle are arranged at one end, far away from the tool shank, of the tool head, the first point angle is larger than the second point angle, the second main cutting edge corresponding to the second point angle is used for rough machining, the first main cutting edge corresponding to the first point angle is used for finish machining, alternate machining is performed, the rough machined burr can be instantly finished, and the tool is multipurpose; the front angle of the second peripheral edge and the rear angle of the second peripheral edge are smaller than the front angle of the first peripheral edge and the rear angle of the first peripheral edge, so that the corresponding second main cutting edge and second peripheral edge are more wear-resistant and convenient for rough machining; the sharpness of the first main cutting edge and the sharpness of the first peripheral edge corresponding to the side with the large point angle are high, and the fine trimming is facilitated, so that the problems of groove hole deformation and burr burrs can be well solved, and the quality of the groove hole drilled by the cutter is high.
In some preferred forms, the first point angle is 65 ° -70 °.
In some preferred forms, the second point angle is 45 ° -50 °.
In some preferred forms, the first peripheral edge rake angle is 16 ° -20 °.
In some preferred forms, the first peripheral edge relief angle is 16 ° -20 °.
In some preferred forms, the second peripheral edge rake angle is 5 ° to 10 °.
In some preferred forms, the second peripheral edge relief angle is 5 ° -8 °.
In some preferred forms, the core diameter taper is set at 4% to 6%, where the core diameter taper = (back end core thickness-front end core thickness)/blade length x 100%.
In some preferred forms, the helix angle of the first flute is equal to the helix angle of the second flute.
The utility model has the beneficial effects that:
(1) The first point angle is larger than the second point angle, the second main cutting edge corresponding to the second point angle is used for rough machining, the first main cutting edge corresponding to the first point angle is used for finishing, alternate machining is performed, the rough machined burr can be finished instantly, and the cutter is multipurpose;
(2) The front angle of the second peripheral edge and the rear angle of the second peripheral edge are smaller than the front angle of the first peripheral edge and the rear angle of the first peripheral edge, and the second main cutting edge and the second peripheral edge corresponding to the side with the small point angle are more wear-resistant and are convenient for rough machining; the sharpness of the first main cutting edge and the sharpness of the first peripheral edge corresponding to the side with the large point angle are high, so that the fine trimming is facilitated, the problems of deformation of a slot hole and burrs of the burr can be well solved, and the quality of the slot hole drilled by the cutter is high;
(3) The core diameter taper of the cutter is controlled to be 4% -6%, the rigidity of the cutter is enhanced, the cutter is not easy to shake in the drilling process, deflection of the cutter in the use process is reduced, and deformation of a slot hole is avoided.
Drawings
Fig. 1 is a schematic view of a prior art drill bit cutter.
Fig. 2 is a side view of the drill bit cutter shown in fig. 1.
Fig. 3 is a cross-sectional view of the drill bit tool A-A shown in fig. 1.
FIG. 4 is a schematic diagram of the structure of the rough and fine integrated slot drilling tool according to the present utility model.
Fig. 5 is a side view of the rough and fine integrated slot cutter shown in fig. 4.
Fig. 6 is a sectional view of the rough and fine integrated slot cutter B-B shown in fig. 4.
FIG. 7 is a schematic view of another angle of the rough and fine integrated slot drilling tool according to the present utility model.
Symbol description
The shank portion 10, the first rake surface 11, the first relief surface 12, the first main cutting edge 13, the first edge 14, the first peripheral edge 15, the second rake surface 21, the second relief surface 22, the second main cutting edge 23, the second edge 24, the second peripheral edge 25, the head portion 20, the first junk slot 30, the second junk slot 40, the transition portion 50, the chisel edge 60, the kick-out structure 70, the linear structure 80, the central axis 90
Detailed Description
In order to describe the technical content, the constructional features and the effects achieved by the present utility model in detail, the following description is made with reference to the embodiments in conjunction with the accompanying drawings.
As shown in fig. 4 to 7, the rough and fine integrated slot drilling tool of the present utility model comprises a tool shank 10 and a tool bit 20 connected to the tool shank 10, wherein the tool bit 20 is provided with a first chip groove 30 and a second chip groove 40 in a spiral structure, one end of the tool bit 20 far away from the tool shank 10 is provided with a first rake face 11, a first flank face 12, a second rake face 21 and a second flank face 22, the first rake face 11 and the first chip groove 30 intersect to form a first main cutting edge 13, the first rake face 11 and the tool bit 20 intersect circumferentially to form a first tool edge 14, the first tool edge 14 forms a first peripheral edge 15 on the tool bit 20 along the spiral extending direction of the first chip groove 30, and the first peripheral edge 15 has a first peripheral edge rake angle β1 and a first peripheral edge relief angle β2; the second rake surface 21 intersects the second chip groove 40 to form a second main cutting edge 23, the second rake surface 21 intersects the cutter head 20 circumferentially to form a second cutter edge 24, the second cutter edge 24 forms a second peripheral edge 25 on the cutter head 20 along the spiral extension direction of the second chip groove 40, and the second peripheral edge 25 has a second peripheral edge rake angle β3 and a second peripheral edge relief angle β4; the angle between the first main cutting edge 13 and the central axis 90 of the shank portion 10 forms a first point angle α1, the angle between the second main cutting edge 23 and the central axis 90 of the shank portion 10 forms a second point angle α2, the first point angle α1 is greater than the second point angle α2 (i.e., α1 > α2), the first peripheral edge rake angle β1 is greater than the second peripheral edge rake angle β3 (i.e., β1 > β3), and also greater than the second peripheral edge relief angle β4 (i.e., β1 > β4); the first peripheral edge relief angle β2 is greater than the second peripheral edge rake angle β3 (i.e., β2 > β3) and is also greater than the second peripheral edge relief angle β4 (i.e., β2 > β4).
In the above technical solution, the end of the cutter head 20 far from the cutter shank 10 is provided with the first point angle α1 and the second point angle α2, the first point angle α1 is greater than the second point angle α2, the second main cutting edge 23 corresponding to the second point angle α2 is used for rough machining, the first main cutting edge 13 corresponding to the first point angle α1 is used for finishing, and alternate machining is performed, the rough machined burr can be finished instantly, and the cutter is multipurpose; the second peripheral edge rake angle beta 3 and the second peripheral edge relief angle beta 4 are smaller than the first peripheral edge rake angle beta 1 and the first peripheral edge relief angle beta 2, so that the corresponding second main cutting edge 23 and second peripheral edge 25 are more wear-resistant and convenient for rough machining; the sharpness of the first main cutting edge 13 and the sharpness of the first peripheral edge 15 corresponding to the side with the large point angle are high, and the fine trimming is facilitated, so that the problems of deformation of a slot hole and burrs of the burr can be well solved, and the quality of the slot hole of the cutter is high.
Referring to fig. 4, the head portion 20 is a portion in contact with a workpiece, a drill tip is provided at the front end of the head portion 20, the rear end of the head portion 20 is connected to the shank portion 10, and the shank portion 10 is a portion designed to correspond to the shape of the spindle of the machine tool, which is not limited thereto. Further, the head portion 20 and the shank portion 10 are integrally formed or welded. The integrated molding of the tool bit portion 20 and the tool shank portion 10 can prolong the service life of the tool, and the tool bit portion 20 and the tool shank portion 10 are fixedly connected in a welding manner, so that the recovered waste tool can be fully utilized as the tool shank portion 10, and the cost is reduced. In a preferred embodiment, a transition portion 50 may be further disposed between the cutter head portion 20 and the shank portion 10, wherein the diameter of the transition portion 50 in the direction from the shank portion 10 to the cutter head portion 20 is gradually reduced to improve the stability of drilling.
Referring to fig. 4 and 7, the first and second chip grooves 30 and 40 are spirally arranged on the peripheral surface of the head portion 20 for discharging cutting chips of the first and second main cutting edges 13 and 23. Further, the first flutes 30 and the second flutes 40 are symmetrically disposed about the central axis 90 of the shank portion 10, wherein the helix angle of the first flutes 30 may or may not be the same as the helix angle of the second flutes 40, and in some preferred embodiments, the helix angle of the first flutes 30 is equal to the helix angle of the second flutes 40, thereby improving stability of the drill.
Referring to fig. 7, the first point angle α1 is 65 ° -70 °, the second point angle α2 is 45 ° -50 °, the first point angle α1 is greater than the second point angle α2, the second main cutting edge 23 corresponding to the second point angle α2 is used for rough machining, the first main cutting edge 13 corresponding to the first point angle α1 is used for finishing, and the alternately machined burrs can be instantaneously finished. As an example, the first point angle α1 may be, but is not limited to, 65 °, 66 °, 67 °, 68 °, 69 °, 70 °; the second point angle α2 may be, but is not limited to, 45 °, 46 °, 47 °, 48 °, 49 °, 50 °, for example, the first point angle α1 is 65 °, the second point angle α2 is 45 °; also for example, the first point angle α1 is 70 ° and the second point angle α2 is 50 °.
Referring to fig. 6, the first peripheral edge rake angle β1 is 16 ° -20 °, and the first peripheral edge relief angle β2 is 16 ° -20 °. As an example, the first peripheral edge rake angle β1 may be, but is not limited to, 16 °, 17 °, 18 °, 19 °, 20 °; the first peripheral edge relief angle β2 may be, but is not limited to, 16 °, 17 °, 18 °, 19 °, 20 °. The first peripheral edge rake angle β1 and the first peripheral edge relief angle β2 may be the same or different. Further, the first peripheral edge rake angle β1 is larger than the second peripheral edge rake angle β3 and also larger than the second peripheral edge relief angle β4, the first peripheral edge relief angle β2 is larger than the second peripheral edge rake angle β3 and also larger than the second peripheral edge relief angle β4, so that the second main cutting edge 23 and the second peripheral edge 25 are more wear-resistant and convenient for rough machining, the sharpness of the first main cutting edge 13 and the first peripheral edge 15 is high, more convenient for finishing, and especially, the angle design ensures that a crescent structure 70 is formed at the tip of the first cutter edge 14, the cutting capability is improved, the slot flash is effectively cleared during finishing, and the tip of the second cutter edge 24 is provided with a linear structure 80, so that the cutter tip is prevented from being broken during rough machining and the cutter is more wear-resistant. In some preferred embodiments, the second peripheral-edge rake angle β3 is 5 ° -10 °, and as an example, the second peripheral-edge rake angle β3 may be, but is not limited to, 5 °, 6 °, 7 °, 8 °, 9 °, 10 °. The second peripheral edge relief angle beta 4 is 5 deg. -8 deg., as an example, the second peripheral edge relief angle beta 4 may be, but is not limited to, 5 deg., 6 deg., 7 deg., 8 deg.. In some embodiments, the second peripheral edge rake angle β3 may be equal to or different from the second peripheral edge relief angle β4. Specifically, the first peripheral edge rake angle β1 is 18 °, the first peripheral edge relief angle β2 is 16 °, the second peripheral edge rake angle β3 is 5 °, and the second peripheral edge relief angle β4 is 6 °.
Referring to fig. 4, the core diameter taper is set at 4% -6%, wherein the core diameter taper= (back end core thickness-front end core thickness)/blade length×100%, wherein the front end core thickness is the blade diameter of the tip of the cutter head portion 20, the back end core thickness is the diameter of the end of the cutter head portion 20, and the blade length is the length from the drill tip to the end of the first peripheral blade 15 or the second peripheral blade 25. The rigidity of the cutter can be enhanced by setting the core diameter taper of the cutter at 4% -6%, so that the cutter is not easy to shake in the drilling process, deflection of the cutter in the use process is reduced, and deformation of the slot holes can be avoided. By way of example, but not limitation, the core taper is set at 4%, 4.5%, 5%, 5.5%, 6%.
Referring to fig. 5, a chisel edge 60 is disposed between the first main cutting edge 13 and the second main cutting edge 23, and the chisel edge 60 is used for ensuring the stability of drilling holes by the rough and fine integrated slot drilling tool.
The foregoing disclosure is merely illustrative of the principles of the present utility model, and thus, it is intended that the scope of the utility model be limited thereto and not by this disclosure, but by the claims appended hereto.
Claims (10)
1. The utility model provides a thick smart integrative cutter for boring slot hole, includes the shank portion and connects the tool bit portion of shank portion, the tool bit portion is spiral structure's setting first chip groove and second chip groove, its characterized in that:
The cutter head is characterized in that one end, far away from the cutter handle, of the cutter head is provided with a first rake face and a second rake face, the first rake face is intersected with the first chip groove to form a first main cutting edge, the first rake face is intersected with the cutter head in the circumferential direction to form a first cutter edge, the first cutter edge is spirally extended in the first chip groove to form a first peripheral edge on the cutter head, and the first peripheral edge is provided with a first peripheral edge rake angle and a first peripheral edge relief angle;
The second rake face and the second chip groove are intersected to form a second main cutting edge, the second rake face and the cutter head are circumferentially intersected to form a second cutter edge, a second peripheral edge is formed on the cutter head along the spiral extension direction of the second chip groove, and the second peripheral edge is provided with a second peripheral edge rake angle and a second peripheral edge relief angle;
The included angle between the first main cutting edge and the central shaft of the tool handle part forms a first point angle, the included angle between the second main cutting edge and the central shaft of the tool handle part forms a second point angle, the first point angle is larger than the second point angle, and the front angle of the first peripheral edge is larger than the front angle of the second peripheral edge and is also larger than the rear angle of the second peripheral edge; the first peripheral edge relief angle is greater than the second peripheral edge relief angle and is also greater than the second peripheral edge relief angle.
2. The rough and fine integrated slot drilling tool according to claim 1, wherein: the first point angle is 65-70 degrees.
3. The rough and fine integrated slot drilling tool according to claim 1, wherein: the second point angle is 45-50 degrees.
4. The rough and fine integrated slot drilling tool according to claim 1, wherein: the front angle of the first peripheral edge is 16-20 degrees.
5. The rough and fine integrated slot drilling tool according to claim 1, wherein: the relief angle of the first peripheral edge is 16-20 degrees.
6. The rough and fine integrated slot drilling tool according to claim 1, wherein: the front angle of the second peripheral edge is 5-10 degrees.
7. The rough and fine integrated slot drilling tool according to claim 1, wherein: the relief angle of the second peripheral edge is 5-8 degrees.
8. The rough and fine integrated slot drilling tool according to claim 1, wherein: the core diameter taper is set at 4% -6%, wherein the core diameter taper= (back end core thickness-front end core thickness)/blade length x 100%.
9. The rough and fine integrated slot drilling tool according to claim 1, wherein: a chisel edge is arranged between the first main cutting edge and the second main cutting edge.
10. The rough and fine integrated slot drilling tool according to claim 1, wherein: the helix angle of the first flutes is equal to the helix angle of the second flutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322415850.5U CN220882641U (en) | 2023-09-05 | 2023-09-05 | Coarse and fine integrated cutter for drilling slotted holes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322415850.5U CN220882641U (en) | 2023-09-05 | 2023-09-05 | Coarse and fine integrated cutter for drilling slotted holes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220882641U true CN220882641U (en) | 2024-05-03 |
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ID=90874793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322415850.5U Active CN220882641U (en) | 2023-09-05 | 2023-09-05 | Coarse and fine integrated cutter for drilling slotted holes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220882641U (en) |
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2023
- 2023-09-05 CN CN202322415850.5U patent/CN220882641U/en active Active
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