CN214684408U - Drilling tool - Google Patents
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- CN214684408U CN214684408U CN202022274270.5U CN202022274270U CN214684408U CN 214684408 U CN214684408 U CN 214684408U CN 202022274270 U CN202022274270 U CN 202022274270U CN 214684408 U CN214684408 U CN 214684408U
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- 238000005553 drilling Methods 0.000 title claims abstract description 147
- 239000000498 cooling water Substances 0.000 claims description 39
- 238000000034 method Methods 0.000 claims description 22
- 230000008569 process Effects 0.000 claims description 17
- 238000001816 cooling Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims 1
- 230000008859 change Effects 0.000 description 7
- 239000000956 alloy Substances 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 229910000997 High-speed steel Inorganic materials 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000510 noble metal Inorganic materials 0.000 description 2
- 239000010970 precious metal Substances 0.000 description 2
- 229910001200 Ferrotitanium Inorganic materials 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 238000007514 turning Methods 0.000 description 1
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- Drilling Tools (AREA)
Abstract
The utility model provides a drilling tool, which comprises a drilling tool body and a drilling tool bit, wherein a first spiral groove is arranged on the drilling tool body, a second spiral groove is arranged on the drilling tool bit, and the second spiral groove is communicated with the first spiral groove so as to discharge removed scraps; the drilling tool body is also provided with a third groove, the bottom surface of the third groove is provided with a positioning pin hole, the bottom of the drilling tool bit is provided with a cylinder, and the drilling tool bit is inserted into the positioning pin hole through the cylinder so as to be arranged in the third groove; the drilling tool comprises a cylindrical body, a drilling tool bit and a drilling tool body, wherein the cylindrical body is provided with a limiting hole, the drilling tool body is provided with a threaded hole, and a screw with threads at the root penetrates through the threaded hole and the limiting hole to lock the drilling tool bit. This scheme is keeping under the centre gripping precision prerequisite, and effective locking number of times is multiple level and increases, has higher drilling efficiency.
Description
Technical Field
The utility model relates to a device drilling equipment technical field especially relates to a drilling tool.
Background
The drilling tool used in the metal drilling process is usually a twist drill, which drills through the rotation of the twist drill relative to a fixed axis and is named as a twist because the chip grooves are spirally shaped. The helical flutes of conventional twist drills have 2 flutes, 3 flutes, or more, but are most commonly 2 flutes. Twist drills can be used clamped on hand-held drilling tools, both manual and electric, or drilling, milling, turning and even machining centers. The drill bit is made of high-speed tool steel or hard alloy, so that the conventional metal drilling drill bit is a high-speed steel twist drill or a hard alloy twist drill. In the actual metal drilling process, the high-speed steel twist drill has short service life, low cutting and drilling efficiency and poor precision compared with a hard alloy twist drill, and the hard alloy twist drill is basically adopted as a drilling tool in high-requirement application occasions. The hard alloy is composed of noble metal tungsten, cobalt and trace rare elements, and is not renewable, if the drill bit and the drill bit body are of an integrated structure, the hard alloy material is used, so that the manufacturing cost is high, in addition, because in the drilling process, the use strength of the drill bit is high, the head is continuously abraded in the drilling process, finally, the drill bit can not be normally used, then, the integrated drilling tool needs to be replaced, the cost is high, and the waste of resources such as noble metals is serious.
Based on the problems of high cost of the integrated drilling tool and serious resource waste of precious metals and the like, people (the prior art) design a split type drilling tool capable of disassembling and replacing a drilling tool bit, the problems of high cost and serious resource waste of precious metals and the like are solved, and the integrated drilling tool has good advantages. However, the existing drilling tools with replaceable drill bits generally have some problems, such as: when mild steel, titanium and stainless steel are drilled and machined, some split drilling tools which are connected together by deformation clamping are easy to turn around in the tool retracting process to cause damage to a drill rod, so that high-value parts are scrapped; or, due to high temperature and high load generated in the drilling process, the drill body of the split type drill bit clamped by deformation reaches the fatigue life limit too early (effective 10-20 times of bit change), so that the drill bit is not clamped tightly, the drilling precision and the service life of the drill bit are influenced, the processing stability is also influenced, and the drilling efficiency is low or the drilling yield is low; untimely replacement of the drill rod can cause breakage and damage to parts in the drilling process, and can also damage a machine tool spindle in serious cases, thereby causing serious consequences.
In summary, a technical scheme capable of effectively ensuring the drilling efficiency and the drilling yield is lacked in the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model provides a drilling tool to solve and lack the technical problem that one kind can effectively guarantee the technical scheme of drilling efficiency and drilling yield among the prior art scheme.
The drilling tool provided by the embodiment of the utility model is used for drilling and forming a round hole on a workpiece, comprises a drill cutter body and a drill cutter head,
the drill bit body is provided with a clamping handle and a first spiral groove for accommodating scraps to be removed, the drill bit head is provided with a second spiral groove for accommodating scraps to be removed, and the second spiral groove is communicated with the first spiral groove;
the drilling tool body is provided with a cooling water hole for cooling the drilling tool body, the drilling tool bit and the workpiece in the working process;
wherein,
the drilling tool body is also provided with a third groove for accommodating the drilling tool bit, the bottom surface of the third groove is provided with a positioning pin hole, the bottom of the drilling tool bit is provided with a cylinder, and the drilling tool bit is inserted into the positioning pin hole through the cylinder so as to be arranged in the third groove;
the drilling tool comprises a cylindrical body, a drilling tool bit and a drilling tool body, wherein the cylindrical body is provided with a limiting hole, the drilling tool body is provided with a threaded hole, and a screw with threads at the root penetrates through the threaded hole and the limiting hole to lock the drilling tool bit.
In one embodiment of the present invention,
the axis of the limiting hole and the bottom surface of the third groove form an included angle of 30-60 degrees; and/or
The diameter of the limiting hole is 1mm-4 mm; and/or
The depth of the limiting hole is 0.5mm-15 mm; and/or
The distance between the axis of the limiting hole and the bottom surface of the cylinder is 2mm-6 mm.
In one embodiment of the present invention,
the threaded hole is provided with an orifice chamfer of 50-90 degrees; and/or
The size of the threaded hole is greater than or equal to M2.5 and less than or equal to M6; and/or
The diameter of the threaded hole is more than or equal to 3.0 and less than or equal to 10.0.
In one embodiment, the flank face of the drill bit comprises a first-angle inclined plane and a second-angle inclined plane, and the first-angle inclined plane and the second-angle inclined plane are connected through a circular arc surface;
the arc surface is tangent to the inclined plane of the first angle and the inclined plane of the second angle.
In one embodiment, the cooling water hole provided in the drill body includes:
a first cooling water hole is formed in the axis of the handle part;
a second cooling water hole is formed in the back of the first spiral groove;
the second cooling water hole is communicated with the first cooling water hole and is connected with the first cooling water hole through a connecting hole.
In one embodiment of the present invention,
the included angle between the second cooling water hole and the connecting hole is 90 degrees;
the diameter of the first cooling water hole is 2-12 mm,
the diameter of the second cooling water hole is 1-6 mm, and the diameter of a connecting hole between the first cooling water hole and the second cooling water hole is 1-6 mm.
In one embodiment of the present invention,
the number of the first spiral grooves is at least two;
the first spiral groove is a variable spiral groove and comprises a first spiral groove top with a first preset length and a first spiral groove root with a second preset length;
wherein the helix angle of the top of the first helical groove is 20-60 degrees.
In one embodiment of the present invention,
the width of the third groove is 4-16 mm;
the bottom surface of the third groove is perpendicular to the axis of the drilling tool body.
In one embodiment of the present invention,
the included angle between the center line of the threaded hole and the third groove is 30-60 degrees;
the included angle between the central line of the threaded hole and the bottom surface of the third groove is-5 degrees;
the center line of the threaded hole is intersected with the straight line where the positioning pin hole is located.
In one embodiment of the present invention,
the diameter of the positioning pin hole is 3-12 mm;
the depth of the positioning pin hole is 3-12 mm;
the angle of the first chamfer of the hole of the positioning pin hole is 30-60 degrees, and the length of the first chamfer is C0.1-C3. The embodiment of the utility model provides a drilling tool, the drilling tool body can regard as an independent individual with the drilling tool bit respectively, when the great drilling tool bit of use intensity damages, change corresponding drilling tool bit alright again, need not to change the drilling tool body, based on the drilling tool body is bulky, the materials are many, and not fragile in the use, consequently, resource or rare metal's waste that the change integral type drilling tool leads to has effectively been solved to this scheme.
In addition, the cylinder is provided with a limiting hole, the drilling tool body is provided with a threaded hole, and a screw with a thread at the root penetrates through the threaded hole and the limiting hole, so that the drilling tool body and the drilling tool head are fixed together, and therefore, the drilling tool head can be effectively prevented from rotating relative to the drilling tool body; on the other hand, the drill bit can be effectively prevented from moving up and down relative to the drill bit body. The drilling tool provided by the utility model does not relate to the deformation of the drilling head or the drilling tool body in the drilling process, so that the drilling head can be replaced for continuous use after the drilling head is damaged, and the effective replacement times of the drilling head are obviously increased and can reach ten thousands of times; compare in prior art scheme with split type brill cutter body and the fixed ten times together of drill bit or the phenomenon that locking effect will not satisfy the requirement after twenty effective drilling, this scheme is keeping under the centre gripping precision prerequisite, and the effective locking number of times in the drilling in-process is multiple level and increases, and then has improved drilling efficiency.
Drawings
The accompanying drawings are provided to illustrate the present invention, and it is to be understood that the embodiments described below constitute some of the embodiments of the present invention, and do not constitute undue limitations on the invention. In the drawings:
fig. 1 is a schematic structural diagram of a drilling tool according to an embodiment of the present invention;
fig. 2 is a schematic view illustrating the size of the limiting hole in the drill bit and the positional relationship between the limiting hole and the third groove according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a rear tool face of a drill bit provided in an embodiment of the present invention, which includes a slanted plane with a first angle, a slanted plane with a second angle, and an arc surface;
fig. 4 is a schematic structural view illustrating a drill bit body of a drilling tool according to an embodiment of the present invention including a first cooling water hole and a second cooling water hole;
fig. 5 is a schematic structural view illustrating dimensions and connection relationships of the first cooling water hole and the second cooling water hole of the drilling tool according to an embodiment of the present invention;
fig. 6a is a schematic structural diagram representing a positional relationship between a top of a first spiral groove of a drilling tool and an axial lead of a positioning pin hole according to an embodiment of the present invention;
fig. 6b is a schematic structural diagram representing a position relationship between a root of the first spiral groove and an axial lead of the positioning pin hole of the drilling tool according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram representing a width of a third groove on a drill bit body of a drilling tool according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram representing the size, depth and other parameters of the dowel hole in the drill body of the drilling tool according to the embodiment of the present invention.
Detailed Description
To make the purpose, technical solution and advantages of the present invention clearer, the following will combine the embodiments of the present invention and the corresponding drawings to clearly and completely describe the technical solution of the present invention. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The technical solutions provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Referring to fig. 1, an embodiment of the present invention provides a drilling tool for drilling a round hole in a workpiece, the drilling tool includes a drill bit body a and a drill bit B, a clamping handle a1 and a first spiral groove a2 for accommodating chips to be removed are disposed on the drill bit body a, a second spiral groove B1 for accommodating chips to be removed is disposed on the drill bit B, and the second spiral groove B1 is communicated with the first spiral groove a 2; further, during the drilling process, the generated removal chips are sent out of the workpiece along with the first spiral groove a2 and the second spiral groove B1;
the drilling tool body is provided with cooling water holes for cooling the drilling tool body A, the drilling tool head B and a workpiece in the working process; wherein,
a third groove A4 for accommodating the drilling head is further arranged on the drilling cutter body A, a positioning pin hole A5 is arranged on the bottom surface of the third groove A4, a cylinder B2 is arranged on the bottom of the drilling cutter head B, and the drilling cutter head B is inserted into the positioning pin hole A5 through the cylinder B2 so that the drilling cutter head B is placed in the third groove A4;
the cylinder B2 is provided with a limit hole B3, the drill bit body A is provided with a threaded hole A7, and the drill bit B is locked again by a screw D with a thread at the root part penetrating through the threaded hole A7 and the limit hole B3.
The embodiment of the utility model provides a drilling tool, drilling tool body A and drilling tool bit B can regard as an independent individual respectively, when the great drilling tool bit of use intensity damages, change corresponding drilling tool bit alright again, need not to change the drilling tool body, based on the drilling tool body is bulky, the materials is many, and is not fragile in the use, consequently, the resource or the rare metal's that integral type drilling tool change process leads to waste has effectively been solved to this scheme.
In addition, the cylinder is provided with a limiting hole which can be communicated or not communicated, the drill cutter body is provided with a threaded hole, a screw with a thread at the root penetrates through the threaded hole and the limiting hole, so that the drill cutter body and the drill cutter head are fixed together, the inclined plane is clamped tightly by the screw so that the drill cutter head is locked in the third groove, and the first screw has acting force in the horizontal direction and the vertical direction on the drill cutter head, so that the drill cutter head can be effectively prevented from rotating relative to the drill cutter body; on the other hand, the drill bit can be effectively prevented from moving up and down relative to the drill bit body. The drilling tool provided by the utility model does not relate to the deformation of the drilling head or the drilling tool body in the drilling process, so that the drilling head can be replaced for continuous use after the drilling head is damaged, and the effective replacement times of the drilling head are obviously increased and can reach ten thousands of times; compare in prior art scheme with split type brill cutter body and the fixed ten times together of drill bit or the phenomenon that locking effect will not satisfy the requirement after twenty effective drilling, this scheme is keeping under the centre gripping precision prerequisite, and the effective locking number of times in the drilling in-process is multiple level and increases, and then has improved drilling efficiency.
In the embodiment of the present invention, referring to fig. 2, an included angle of 30 ° to 60 ° is formed between the axis of the limiting hole B3 and the bottom surface of the third groove a4, and the diameter R1 of the limiting hole B3 is 1mm to 4 mm; the depth of the limiting hole B3 is 0.5mm-15 mm; the distance L1 between the axis of the limiting hole B3 and the bottom surface of the cylinder B2 is 2mm-6 mm.
In the embodiment of the present invention, referring to fig. 3, the rear tool face of the drill bit B includes a slanted plane with a first angle c ° and a slanted plane with a second angle d °, and the slanted plane with the first angle c ° and the slanted plane with the second angle d ° are connected through an arc surface; the central angle corresponding to the arc surface is R, and the width of the bottom of the drill bit is
The arc surface is tangent to the inclined plane of the first angle and the inclined plane of the second angle. The rear cutter face of the drill cutter head adopts the design mode, which is beneficial to improving the positioning precision of the drill cutter head, thereby effectively reducing the probability that the drill hole processed by the drill cutter head does not meet the requirement, and improving the processing efficiency; meanwhile, the invalid working times of the drill bit are effectively reduced, so that the tool changing times are effectively reduced; in addition, by adopting the design mode, the length of the scraps removing can reach the preset length and then be crushed, so that the scraps are discharged along with the first spiral groove and the second spiral groove, and the phenomenon that the drilling tool bit or the drilling tool bit body is blocked and cannot work normally due to the fact that the scraps are too long and cannot be discharged is effectively reduced.
In the embodiment of the present invention, referring to fig. 4, the cooling water hole formed in the drilling tool body a includes:
a first cooling water hole A8 is provided in the axial center of the shank;
a second cooling water hole A3 is formed in the back of the first spiral groove;
the second cooling water hole A3 and the first cooling water hole A8 are connected through a connection hole a 6.
In the embodiment of the present invention, referring to fig. 5, an included angle α between the second cooling water hole A3 and the connecting hole a6 is 90 °;
the diameter D1 of the first cooling water hole A8 is 2-12 mm,
the diameter D2 of the second cooling water hole A3 is 1-6 mm, and the diameter D3 of a connecting hole A6 between the first cooling water hole A8 and the second cooling water hole A3 is 1-6 mm.
In the embodiment of the present invention, the number of the first spiral grooves a2 is at least two, and if it can be 2, 3 or more, in the embodiment of the present invention, 2 first spiral grooves a2 are taken as an example for illustration, but not a specific limitation to the number of the first spiral grooves a2, it is pointed out that, on the basis of the embodiment of the present invention, only the number of the first spiral grooves a2 is changed, and creative changes are not made in other aspects, and thus the present invention still belongs to the protection scope of the embodiment of the present invention.
In the embodiment of the present invention, the first spiral groove a2 may be a variable spiral groove; the variable helical groove includes a first helical groove crest of a first predetermined length and a first helical groove root of a second predetermined length, wherein the first helical groove crest is the portion proximate the drill bit B and the first helical groove root is the portion proximate the grip shank a 1. Further, the first predetermined length may be 0.5-3 times the diameter of the drill bit B, such as 0.5, 1, 2 or 3 times the diameter of the drill bit B. Referring to FIG. 6a, the helix angle β 1 at the top of the first helical groove is 20 ° -60 °, such as 20 °, 35 °, 45 °, or 60 °; referring to fig. 6b, the helix angle β 2 of the root of the first helical groove may be 0-20 °, such as 0 °, 10 °, or 20 °. It is noted that in the embodiment of the present invention, the helix angle of the top of the first spiral groove is larger than the helix angle of the root of the first spiral groove, thereby ensuring higher drilling efficiency.
In the embodiment of the present invention, referring to fig. 7, the width R2 of the third groove a4 is 4-16 mm;
the bottom surface of the third groove a4 is perpendicular to the axial lead of the drill bit body a.
In the embodiment of the present invention, the included angle between the center line of the threaded hole and the third groove a4 is 30 ° -60 °; the included angle between the central line of the threaded hole and the bottom surface of the third groove is-5 degrees; the center line of the threaded hole is intersected with the straight line where the positioning pin hole is located.
In the embodiment of the present invention, referring to fig. 8, the diameter D4 of the dowel hole a5 is 3-12 mm; the depth D5 of the locating pin hole is 3-12 mm; the angle beta 3 of the first chamfer of the hole of the positioning pin hole is 30-60 degrees, and the length L2 is C0.1-C3.
It should be noted that, in the embodiments of the present invention, the term "connected" may be a direct connection or an indirect connection. The connection can be through a wire or other connection structure, such as a hose. The present solution is not particularly limited.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The technical solution of the present invention has been described only with reference to a preferred embodiment, but to those skilled in the art, the idea of the embodiment of the present invention should be changed in the specific implementation and application scope, so that, in summary, the content of the present specification should not be understood as the limitation of the present invention, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included within the scope of the claims of the present invention.
Claims (9)
1. A drilling tool for drilling a round hole on a workpiece comprises a drill cutter body and a drill cutter head,
the drill bit body is provided with a clamping handle and a first spiral groove for accommodating scraps to be removed, the drill bit head is provided with a second spiral groove for accommodating scraps to be removed, and the second spiral groove is communicated with the first spiral groove;
the drilling tool body is provided with a cooling water hole for cooling the drilling tool body, the drilling tool bit and the workpiece in the working process;
it is characterized in that the preparation method is characterized in that,
the drilling tool body is also provided with a third groove for accommodating the drilling tool bit, the bottom surface of the third groove is provided with a positioning pin hole, the bottom of the drilling tool bit is provided with a cylinder, and the drilling tool bit is inserted into the positioning pin hole through the cylinder so as to be arranged in the third groove;
the drilling tool comprises a cylindrical body, a drilling tool bit and a drilling tool body, wherein the cylindrical body is provided with a limiting hole, the drilling tool body is provided with a threaded hole, and a screw with threads at the root penetrates through the threaded hole and the limiting hole to lock the drilling tool bit.
2. The drilling tool of claim 1,
the axis of the limiting hole and the bottom surface of the third groove form an included angle of 30-60 degrees; and/or
The diameter of the limiting hole is 1mm-4 mm; and/or
The depth of the limiting hole is 0.5mm-15 mm; and/or
The distance between the axis of the limiting hole and the bottom surface of the cylinder is 2mm-6 mm.
3. The drilling tool of claim 1 or 2,
the threaded hole is provided with an orifice chamfer of 50-90 degrees; and/or
The size of the threaded hole is greater than or equal to M2.5 and less than or equal to M6; and/or
The diameter of the threaded hole is more than or equal to 3.0 and less than or equal to 10.0.
4. The drilling tool of claim 1, wherein the flank surface of the drill bit comprises a first angled rake surface and a second angled rake surface, the first angled rake surface and the second angled rake surface being connected by a radius;
the arc surface is tangent to the inclined plane of the first angle and the inclined plane of the second angle.
5. The drilling tool of claim 1, wherein the cooling water hole provided in the drill body comprises:
a first cooling water hole is arranged at the axis of the handle part;
a second cooling water hole is formed in the back of the first spiral groove;
the second cooling water hole is communicated with the first cooling water hole and is connected with the first cooling water hole through a connecting hole.
6. The drilling tool of claim 5,
the included angle between the second cooling water hole and the connecting hole is 90 degrees;
the diameter of the first cooling water hole is 2-12 mm,
the diameter of the second cooling water hole is 1-6 mm, and the diameter of a connecting hole between the first cooling water hole and the second cooling water hole is 1-6 mm.
7. The drilling tool of claim 1,
the number of the first spiral grooves is at least two;
the first spiral groove is a variable spiral groove and comprises a first spiral groove top with a first preset length and a first spiral groove root with a second preset length;
wherein the helix angle of the first helical groove top is 20-60 °.
8. The drilling tool of claim 1,
the width of the third groove is 4-16 mm;
the bottom surface of the third groove is perpendicular to the axis of the drilling tool body.
9. The drilling tool of claim 1,
the included angle between the center line of the threaded hole and the third groove is 30-60 degrees;
the included angle between the central line of the threaded hole and the bottom surface of the third groove is-5 degrees;
the center line of the threaded hole is intersected with the straight line where the positioning pin hole is located.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022274270.5U CN214684408U (en) | 2020-10-14 | 2020-10-14 | Drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022274270.5U CN214684408U (en) | 2020-10-14 | 2020-10-14 | Drilling tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214684408U true CN214684408U (en) | 2021-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022274270.5U Active CN214684408U (en) | 2020-10-14 | 2020-10-14 | Drilling tool |
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| Country | Link |
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| CN (1) | CN214684408U (en) |
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2020
- 2020-10-14 CN CN202022274270.5U patent/CN214684408U/en active Active
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