CN210280794U - Fracture-preventing counter bore drill assembly - Google Patents
Fracture-preventing counter bore drill assembly Download PDFInfo
- Publication number
- CN210280794U CN210280794U CN201921031081.6U CN201921031081U CN210280794U CN 210280794 U CN210280794 U CN 210280794U CN 201921031081 U CN201921031081 U CN 201921031081U CN 210280794 U CN210280794 U CN 210280794U
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- Prior art keywords
- drill
- counter bore
- fracture
- diameter
- head
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- 238000003801 milling Methods 0.000 claims abstract description 20
- 239000002131 composite material Substances 0.000 claims abstract description 18
- 238000005553 drilling Methods 0.000 claims abstract description 18
- 238000003754 machining Methods 0.000 claims description 4
- 230000002968 anti-fracture Effects 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
- 229910000851 Alloy steel Inorganic materials 0.000 claims 1
- 230000002159 abnormal effect Effects 0.000 abstract description 2
- 238000005299 abrasion Methods 0.000 abstract description 2
- 241001074085 Scophthalmus aquosus Species 0.000 abstract 3
- 150000001875 compounds Chemical class 0.000 abstract 2
- 238000000034 method Methods 0.000 description 3
- 229910000746 Structural steel Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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Abstract
The utility model provides a prevent cracked counter bore drill assembly, compound brill and the through-hole brill that uses including the cooperation, compound brill includes the drill bit body, the one end of drill bit body has the drill bit tip, the drill bit tip is in including the first portion and the setting that are used for processing the head of counter bore the second portion of first portion front end. The utility model uses the composite drill to replace the existing centering drill and the existing rough drill, thereby avoiding the eccentricity problem caused by the inconsistency of the sharp angles of the centering drill and the rough drill, and solving the problem that the through hole drill is likely to be broken; meanwhile, all parameters of the second part of the composite drill are consistent with all parameters of the through hole drill, so that the problem that a drilling and milling drill bit of the through hole drill is broken due to abnormal abrasion is avoided, and the service life and the stability of the counter bore drill component are improved.
Description
Technical Field
The utility model relates to a drill bit field especially relates to a prevent cracked counter bore drill unit spare.
Background
Generally, when a countersunk head bolt or an inner hexagon bolt is installed, a component needs to be subjected to counter bore processing, under the conventional condition, the counter bore processing needs to be performed by means of a centering drill, a rough drill and a through hole drill, namely, the positioning is realized by the centering drill, the rough processing is performed by the rough drill, and finally, the through hole drill is used for milling a through hole; meanwhile, if the sharp angles of the drill points of the rough drill and the through hole drill are not consistent, the drill points of the through hole drill are abnormally worn and broken.
Disclosure of Invention
In order to solve the problem, the utility model provides an anti-fracture counter bore drilling assembly.
The main contents of the utility model include:
an anti-fracture counter bore drill component is used for machining a counter bore on the surface of a workpiece and comprises a head part and a rod part, wherein the diameter of the rod part is smaller than that of the head part, and the head part is in a shape of an inverted frustum; the counter bore drilling assembly comprises a composite drill and a through hole drill, the composite drill comprises a drill body, one end of the drill body is provided with a drill end part, the drill end part comprises a first part and a second part, the first part is used for machining the head of a counter bore, the second part is arranged at the front end of the first part, the first part is in a circular truncated cone shape, the second part is arranged at one end of the small end of the first part, the second part is a conical drill, and the surface of the first part is provided with a milling cutter edge; the through hole drill comprises a drilling and milling drill bit for drilling and milling a rod part of the counter bore; the angle of the sharp angle of the second part is equal to the angle of the sharp angle of the drilling and milling drill bit, and the diameter of the root of the second part is equal to the diameter of the root of the drilling and milling drill bit; the root diameter of the first portion is equal to the diameter of the head of the counterbore, the pitch of the head of the counterbore being equal to 60 °.
Preferably, the root diameter of the second portion is 5.5mm, and the frontal angle of the second portion is 140 °.
Preferably, the drill bit body is cylindrical, and the diameter of the drill bit body is 14 mm.
Preferably, the height of the first portion is 7.36 mm.
Preferably, the composite drill and the through hole drill are made of alloy structural steel.
Preferably, the composite drill and the through hole drill are coated with AlCrN coatings.
The beneficial effects of the utility model reside in that: the utility model provides a fracture-proof counter bore drill component, which uses a composite drill to replace the existing centering drill and rough drill, avoids the eccentricity problem caused by the inconsistency of the sharp angles of the centering drill and the rough drill, and solves the problem that the through hole drill is likely to fracture; meanwhile, all parameters of the second part of the composite drill are consistent with all parameters of the through hole drill, so that the problem that a drilling and milling drill bit of the through hole drill is broken due to abnormal abrasion is avoided, and the service life and the stability of the counter bore drill component are improved.
Drawings
Fig. 1 is a schematic structural view of the composite drill of the present invention;
fig. 2 is a schematic structural diagram of the through-hole drill of the present invention.
Detailed Description
The technical solution protected by the present invention will be specifically described below with reference to the accompanying drawings.
Please refer to fig. 1 and fig. 2. The utility model provides a prevent cracked counter bore drill subassembly for the counter bore on processing work piece 1 surface, the structure of the counter bore of processing is as shown in figure 2, specifically, the counter bore includes head 11 and pole portion 12, the diameter of pole portion 12 is less than the diameter of head 11, 11 shapes of head are radius platform form.
The utility model cancels the centering drill and the rough drill and uses the composite drill 2 to replace the rough drill, in particular, the counter bore drill component of the utility model comprises the composite drill 2 and the through hole drill 3, wherein the composite drill 2 comprises a drill bit body, one end of the drill bit body is provided with a drill bit end part, the drill bit end comprises a first portion 21 for machining the countersunk head 11 and a second portion 22 arranged at the front end of the first portion 21, the first part 21 is in a round table shape, the second part 22 is arranged at one end of the small end of the first part 21, the second part 22 is a conical drill bit, whereas the surface of the first portion 21 is provided with milling edges 210, the second portion 22 is used for centring, the dimensions of which are matched to the dimensions of the drill tip of the through-hole drill 3, avoiding the eccentricity problem, while the first portion 21 is used for drilling and milling a counter bore head, the dimensions of which are matched to the dimensions of the counter bore head 11.
In one embodiment, the through-hole drill 3 comprises a drilling and milling drill bit for drilling and milling a rod of a counter bore, wherein the angle of the front of the second portion 22 is equal to the angle of the front of the drilling and milling drill bit, in this embodiment, the angle of the front of the second portion 22 α and the angle of the front of the drilling and milling drill bit are selected as a standard angle of the front 140 °, meanwhile, the diameter of the root of the second portion 22R 2 is equal to the diameter of the root of the drilling and milling drill bit, in this embodiment, the parameter is selected as a standard value of 5.5mm, in addition, the diameter of the root of the first portion 21R 1 is equal to the diameter of the head 11 of the counter bore, and the slope of the head 11 of the counter bore is equal to 60 °, that is, the slope of the first portion 21 is 60 °, that is, the angle of the taper angle of the first portion 21 β is equal to 60 °.
In other embodiments, the bit body is cylindrical and has a diameter of 14 mm.
In other embodiments, the height H of the first portion 21 is 7.36 mm.
In other embodiments, the composite drill 2 and the through-hole drill 3 are made of alloy structural steel.
Furthermore, an AlCrN coating is applied to the composite drill 2 and the via drill 3.
The working process of the utility model is as follows: firstly, the head part of the counter bore is milled through the composite drill, the positioning hole groove for positioning the through hole drill 3 can be milled, then the rod part of the counter bore is milled through the through hole drill 3, the problem of eccentricity cannot occur in the whole process, and the problems that the through hole drill is easy to break and wear are solved.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (6)
1. An anti-fracture counter bore drill component is used for machining a counter bore on the surface of a workpiece and comprises a head part and a rod part, wherein the diameter of the rod part is smaller than that of the head part, and the head part is in a shape of an inverted frustum; the composite drill comprises a drill body, one end of the drill body is provided with a drill end part, the drill end part comprises a first part used for processing the head of a counter bore and a second part arranged at the front end of the first part, the first part is in a circular truncated cone shape, the second part is arranged at one end of the small end of the first part, the second part is a conical drill, and the surface of the first part is provided with a milling cutter; the through hole drill comprises a drilling and milling drill bit for drilling and milling a rod part of the counter bore; the angle of the sharp angle of the second part is equal to the angle of the sharp angle of the drilling and milling drill bit, and the diameter of the root of the second part is equal to the diameter of the root of the drilling and milling drill bit; the root diameter of the first portion is equal to the diameter of the head of the counterbore, the pitch of the head of the counterbore being equal to 60 °.
2. The fracture-resistant counterbore drill assembly of claim 1, wherein the root diameter of the second portion is 5.5mm and the angle of the sharp corner of the second portion is 140 °.
3. The fracture-resistant counterbore drill assembly of claim 1 wherein the bit body is cylindrical and has a diameter of 14 mm.
4. The fracture-resistant counterbore drill assembly of claim 1, wherein the height of the first portion is 7.36 mm.
5. The fracture-resistant countersink drill assembly of any of claims 1-4, wherein said composite drill and said via drill are of structural alloy steel.
6. The fracture-resistant countersink drill assembly of any of claims 1-4, wherein said composite drill and said via drill are coated with an AlCrN coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921031081.6U CN210280794U (en) | 2019-07-04 | 2019-07-04 | Fracture-preventing counter bore drill assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921031081.6U CN210280794U (en) | 2019-07-04 | 2019-07-04 | Fracture-preventing counter bore drill assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210280794U true CN210280794U (en) | 2020-04-10 |
Family
ID=70100417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921031081.6U Active CN210280794U (en) | 2019-07-04 | 2019-07-04 | Fracture-preventing counter bore drill assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210280794U (en) |
-
2019
- 2019-07-04 CN CN201921031081.6U patent/CN210280794U/en active Active
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |