CN216632706U - Drill bit with adjustable drilling hole diameter - Google Patents
Drill bit with adjustable drilling hole diameter Download PDFInfo
- Publication number
- CN216632706U CN216632706U CN202220200051.9U CN202220200051U CN216632706U CN 216632706 U CN216632706 U CN 216632706U CN 202220200051 U CN202220200051 U CN 202220200051U CN 216632706 U CN216632706 U CN 216632706U
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- Prior art keywords
- drill bit
- blade
- hole
- reaming
- gasket
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- 238000005553 drilling Methods 0.000 title claims abstract description 16
- 238000005520 cutting process Methods 0.000 claims description 42
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 9
- 238000009434 installation Methods 0.000 description 5
- 238000003754 machining Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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Abstract
The utility model discloses a drill bit with an adjustable drilling hole diameter, which comprises a drill bit head, a reaming blade, a screw and a gasket, wherein the outer wall of the drill bit head is provided with at least one mounting groove recessed towards the central line direction of the drill bit head, the center position of the bottom of the mounting groove is provided with a screw hole recessed towards the central line direction of the drill bit head, the gasket is provided with a gasket center through hole, the reaming blade is provided with a blade center through hole, the gasket and the reaming blade are both arranged in the mounting groove, and the screw is connected with the screw hole after sequentially penetrating through the blade center through hole and the gasket center through hole. According to the utility model, the mounting groove is arranged at the head of the drill bit, the reaming blade is mounted, the reaming blade is taken down to be the standard drill bit, the hole with the non-standard aperture can be processed after the reaming blade is mounted, the aperture can be changed by changing the thickness and the number of the gaskets, the drilling processing can be completed at one time, the subsequent reaming or boring is not needed, the non-standard drill bit is not needed to be customized, the production efficiency is improved, and the production cost is reduced.
Description
Technical Field
The utility model relates to a drill bit used in the field of cutting processing, in particular to a drill bit with adjustable drilling aperture.
Background
In the field of cutting machining, drilling with a drill is the most common machining method. Holes of different sizes are machined with correspondingly sized drill bits. In practical application, a cutter manufacturer can only produce standard drill bits (especially large-size drill bits) with limited specification sizes according to relevant standards, such as drill bits with diameters of 40 mm, 41mm and 42mm, and the like, and cannot produce drill bits with various sizes.
If a drill bit with proper size is not available in the drilling process, the drill bit can be processed to the size and precision of a required hole by reaming (with fixed size and adjustable size) or boring, and a non-standard drill bit can be customized. For example, a hole with a diameter of 41.6mm is needed, a drill with a diameter of 41mm may be used to drill the hole, and then a hole expanding tool with a diameter of 41.6mm may be used to perform hole expanding processing, so as to finally form a hole with a diameter of 41.6 mm.
Although reaming processing can meet the size requirement and can improve the precision or the smoothness of the hole, reaming or boring is another process added after drilling, the processing time can be prolonged, the production efficiency is reduced, and the customized non-standard drill bit also needs a manufacturing period and is difficult to meet the real-time processing requirement.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to solving the above problems, and an object of the present invention is to provide a drill with adjustable drilling hole diameter, which can directly machine holes with various hole diameters according to the needs without reaming, boring or customizing a non-standard drill.
The utility model realizes the purpose through the following technical scheme:
the utility model provides a drill bit in adjustable drilling aperture, includes drill bit head, still includes reaming blade, screw and gasket, be equipped with on drill bit head's the outer wall at least one to the mounting groove of drill bit head's central line direction concave yield, mounting groove's tank bottom central point puts and is equipped with to the screw of drill bit head's central line direction concave yield, be equipped with gasket central through hole on the gasket, be equipped with blade central through hole on the reaming blade, the gasket with the reaming blade is all arranged in the mounting groove, the screw passes in proper order blade central through hole with behind the gasket central through hole with the screw is connected.
Preferably, in order to stably mount the reaming blade and the gasket and improve the reaming reliability, the bottom of the mounting groove is a plane and has an included angle of 3-8 degrees with the center line of the bit, the distance between one end of the mounting groove close to the top of the bit and the center line of the bit is greater than the distance between the other end of the mounting groove and the center line of the bit, the reaming blade has a bottom plane, and the bottom plane of the reaming blade is in surface-to-surface contact with the corresponding surface of the gasket and the bottom surface of the mounting groove is in surface-to-surface contact with the corresponding surface of the gasket.
Preferably, in order to enable a function in which one reamer blade is provided with two cutting portions and the other reamer blade can be used after being remounted by rotating 180 °, the bottom surface of the mounting groove, the bottom plane of the reamer blade and the spacer are all in an elliptical shape having a minor axis perpendicular to the center line of the bit, and the major axis of the elliptical shape is 0.5 to 2mm, preferably 1mm, larger than the minor axis.
Preferably, in order to achieve a better reaming effect, at least one convex cutting portion is arranged on the reaming blade, two side surfaces of the cutting portion are respectively a front cutter face and a last rear cutter face, the front cutter face, the top face and the periphery of the cutting portion are intersected to form an L-shaped cutting edge, a corner section in the cutting edge is an arc, the arc radius of the corner section is 0.2-0.8mm, preferably 0.4mm, a first rear cutter face and a second rear cutter face are sequentially arranged between the cutting edge and the last rear cutter face, an included angle of 3-8 degrees is formed between the first rear cutter face and the bottom plane of the reaming blade, preferably 6 degrees is formed between the second rear cutter face and the bottom plane of the reaming blade, and an included angle of 8-12 degrees is formed between the second rear cutter face and the bottom plane of the reaming blade, preferably 10 degrees is formed between the second rear cutter face and the bottom plane of the reaming blade.
Preferably, for better reaming, the rake face has an angle of 3 ° to 6 °, preferably 4 °, with the centre line of the insert central through hole.
As preferred, in order to realize better reaming effect and be convenient for discharge the piece, the cutting portion is two and is located respectively and is close to the major axis both ends of the basal plane of reaming blade, two the cutting portion with the central line of blade center through-hole is the rotational symmetry range as the center pin, lie in two on the reaming blade position between the cutting portion forms two blade chip grooves respectively.
Preferably, in order to achieve tight fit with the nut of the screw so that the nut of the screw is not higher than the cutting portion, the central through hole of the insert is a cylindrical hole, a partial conical surface and a partial cylindrical surface are sequentially arranged from the bottom plane of the reaming insert to the cutting edge of the cutting portion in the inner wall surface of the cutting portion close to the central through hole of the insert, and the diameter of the arc corresponding to one end of the partial conical surface close to the bottom plane of the reaming insert is smaller than that of the arc corresponding to the other end of the partial conical surface.
Preferably, in order to better discharge the chips, head chip grooves are formed between the groove walls of the mounting grooves and the outer wall of the drill head, and the head chip grooves are communicated with the corresponding blade chip grooves.
Preferably, in order to achieve a better reaming effect and improve reaming efficiency, the outer walls of two opposite sides of the drill bit head are respectively provided with the mounting grooves, the two mounting grooves are arranged in an axisymmetric manner by taking the center line of the drill bit head as a central axis, the two reaming blades are respectively mounted in the two mounting grooves through two screws, and one or more gaskets are arranged in each mounting groove.
Preferably, in order to achieve a better drilling effect, two opposite sides of the drill head are respectively head outer edges, and the two mounting grooves are respectively formed in the surfaces of the two head outer edges.
The utility model has the beneficial effects that:
according to the utility model, the mounting groove is arranged at the head part of the drill bit, the reaming blade is mounted, the reaming blade is taken down to be the standard drill bit, the hole with the non-standard aperture can be machined after the reaming blade is mounted, the aperture can be changed by changing the thickness and the number of the gaskets, the drilling machining can be completed at one time, the smoothness and the precision of the drilled hole can be improved, the subsequent reaming or boring is not needed, the non-standard drill bit is not needed to be customized, the production efficiency is improved, and the production cost is reduced.
Drawings
FIG. 1 is a schematic front view of an adjustable drill hole diameter drill bit according to the present invention;
FIG. 2 is a schematic front view of a drill head of the adjustable drill hole diameter drill bit of the present invention;
FIG. 3 is a schematic left side view of a drill head of the adjustable drill hole diameter drill bit of the present invention;
FIG. 4 is a schematic perspective view of a reamer blade for an adjustable borehole aperture drill bit according to the present invention;
FIG. 5 is a schematic front view of a reamer blade for an adjustable borehole diameter drill bit of the present invention;
FIG. 6 is a schematic left side view of a reamer blade for an adjustable borehole diameter drill bit of the present invention;
FIG. 7 is a schematic top view of a reamer blade for an adjustable borehole diameter drill bit of the present invention;
FIG. 8 is a schematic front view of a spacer for an adjustable borehole diameter drill bit according to the present invention;
fig. 9 is a schematic diagram of an application of the drill bit with adjustable borehole diameter according to the present invention.
Detailed Description
The utility model is further described below with reference to the accompanying drawings:
as shown in fig. 1-8, the drill bit with an adjustable drilling aperture of the present invention includes a drill bit head 1, a reaming blade 2, a screw 3 and a gasket 4, wherein at least one mounting groove 12 recessed toward a central line a of the drill bit head 1 is disposed on an outer wall of the drill bit head 1, a screw hole 11 recessed toward the central line a of the drill bit head 1 is disposed at a central position of a bottom of the mounting groove 21, a gasket central through hole 40 is disposed on the gasket 4, a blade central through hole 27 is disposed on the reaming blade 2, the gasket 4 and the reaming blade 2 are both disposed in the mounting groove 12, and the screw 3 sequentially passes through the blade central through hole 27 and the gasket central through hole 40 and then is connected to the screw hole 11.
As shown in fig. 1 to 8, the present invention further discloses a plurality of more preferable specific structures, and the structures can be combined with one or more structures to form a more optimized technical solution according to actual needs.
In order to stably install the reaming blade 2 and the gasket 4 and improve the reaming processing reliability, the bottom of the installation groove 12 is a plane and has an included angle phi of 3 degrees to 8 degrees with the central line A of the drill bit head 1, the distance between one end of the installation groove 12 close to the top of the drill bit head 1 and the central line A of the drill bit head 1 is larger than the distance between the other end of the installation groove 12 and the central line A of the drill bit head 1, the reaming blade 2 is provided with a bottom plane 26, and the bottom surface of the installation groove 12 is in surface-to-surface contact with the corresponding surface of the gasket 4, and the bottom surface of the installation groove 12 is in surface-to-surface contact with the corresponding surface of the gasket 4.
In order to enable the function of one reamer blade 2 providing two cutting portions and being able to use the other after reinstallation by rotation 180 deg., the bottom surface of the mounting groove 12, the bottom plane 26 of the reamer blade 2 and the spacer 4 are all elliptical and the minor axis of the ellipse is perpendicular to the centre line a of the drill head 1, the major axis of the ellipse being 0.5-2mm, preferably 1mm, larger than the minor axis.
In order to achieve better reaming effect, the reaming insert 2 is provided with at least one convex cutting portion, the two side surfaces of the cutting portion are respectively a rake surface 23 and a last flank surface 28, the rake surface 23 intersects with the top surface and the periphery of the cutting portion to form an "L" -shaped cutting edge 22, the corner section in the cutting edge 22 is a circular arc and the circular arc radius r is 0.2-0.8mm, preferably 0.4mm, a first flank surface 21 and a second flank surface 20 are sequentially arranged between the cutting edge 22 and the last flank surface 28, the first flank surface 21 and the bottom plane 26 of the reaming insert 2 form an included angle α 1 of 3-8 °, preferably 6 °, and the second flank surface 20 and the bottom plane 26 of the reaming insert 2 form an included angle α 2 of 8-12 °, preferably 10 °.
For a better reaming effect the rake face 23 has an angle α 3 of 3 ° to 6 °, preferably 4 °, with the centre line of the insert central through hole 27.
In order to realize better reaming effect and be convenient for discharge the piece, the cutting portion is two and is located the major axis both ends that are close to the base plane 26 of reaming blade 2 respectively, two the cutting portion uses the central line of blade central through hole 27 to be the center pin and is rotational symmetry and arranges, lies in two on the reaming blade 2 position between the cutting portion forms two blade chip grooves 29 respectively.
In order to achieve a close fit with the nut of the screw 3 so that the nut of the screw 3 is not higher than the cutting portion, the insert central through hole 27 is a cylindrical hole, a partial conical surface 25 and a partial cylindrical surface 24 are formed in the cutting portion in the order from the bottom plane 26 of the reamer insert 2 to the cutting edge 22 of the cutting portion in the inner wall surface close to the insert central through hole 27, and the diameter of the corresponding circular arc at one end of the partial conical surface 25 close to the bottom plane 26 of the reamer insert 2 is smaller than that at the other end.
For better evacuation of the chips, head flutes 13 are provided between the flute walls of the mounting pocket 12 and the outer wall of the drill head 1, the head flutes 13 communicating with the corresponding blade flutes 29.
In order to achieve a better reaming effect and improve the reaming efficiency, the outer walls of two opposite sides of the drill bit head 1 are respectively provided with mounting grooves 12, the two mounting grooves 12 are arranged in an axisymmetric manner by taking the central line A of the drill bit head 1 as a central axis, the two reaming blades 2 are respectively mounted in the two mounting grooves 12 through two screws 3, and one or more gaskets 4 are arranged in each mounting groove 12.
In order to achieve better drilling effect, the two opposite sides of the drill bit 1 are respectively provided with a head outer edge 10, and two mounting grooves 12 are respectively arranged on the outer walls of the surfaces of the two head outer edges 10.
As shown in fig. 1-9, when in use, the drill bit 1 is mounted on the rod 5, and the drill rod 5 drives the drill bit 1 to rotate, so as to drive the top of the drill bit 1 and the reaming blade 2 to rotate synchronously, thereby achieving the purposes of drilling and reaming at one time; according to the actual required hole diameter, the gaskets 4 with different thicknesses are selected, or the number of the gaskets 4 is changed, so that the distance between the highest positions of the cutting edges 22 of the two chambering blades 2 is changed, the distance is the same as the required hole diameter, and various non-standard holes can be machined.
The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the technical solutions of the present invention, so long as the technical solutions can be realized on the basis of the above embodiments without creative efforts, which should be considered to fall within the protection scope of the patent of the present invention.
Claims (10)
1. A drill bit of adjustable drilling aperture, includes drill bit head, its characterized in that: still include reaming blade, screw and gasket, be equipped with on the outer wall of drill bit head to the mounting groove of the central line direction concave yield of drill bit head, mounting groove's tank bottom central point puts and is equipped with to the screw of the central line direction concave yield of drill bit head, be equipped with gasket central through-hole on the gasket, be equipped with blade central through-hole on the reaming blade, the gasket with the reaming blade is all arranged in the mounting groove, the screw passes in proper order blade central through-hole with behind the gasket central through-hole with the screw is connected.
2. The adjustable borehole aperture drill bit of claim 1, wherein: the bottom of the mounting groove is a plane and forms an included angle of 3-8 degrees with the center line of the drill bit head, the distance between one end, close to the top of the drill bit head, of the mounting groove and the center line of the drill bit head is larger than the distance between the other end of the mounting groove and the center line of the drill bit head, the reaming blade is provided with a bottom plane, and the bottom plane of the reaming blade is in surface-to-surface contact with the corresponding surface of the gasket, and the bottom surface of the mounting groove is in surface-to-surface contact with the corresponding surface of the gasket.
3. The adjustable borehole aperture drill bit of claim 2, wherein: the bottom surface of the mounting groove, the bottom plane of the reaming blade and the gasket are all elliptical, and the minor axis of the ellipse is perpendicular to the center line of the drill bit head.
4. The adjustable borehole aperture drill bit of claim 3, wherein: the reaming blade is provided with at least one convex cutting part, the surfaces of two sides of the cutting part are respectively a front cutter face and a last rear cutter face, the front cutter face and the top face and the periphery of the cutting part are crossed to form an L-shaped cutting edge, a corner section in the cutting edge is an arc, the arc radius of the corner section is 0.2-0.8mm, a first rear cutter face and a second rear cutter face are sequentially arranged between the cutting edge and the last rear cutter face, an included angle of 3-8 degrees is formed between the first rear cutter face and the bottom plane of the reaming blade, and an included angle of 8-12 degrees is formed between the second rear cutter face and the bottom plane of the reaming blade.
5. The adjustable borehole aperture drill bit of claim 4, wherein: and an included angle of 3-6 degrees is formed between the rake face and the central line of the central through hole of the blade.
6. The adjustable borehole aperture drill bit of claim 5, wherein: cutting parts are two and are located respectively and are close to the major axis both ends of the baseplane of reaming blade, two cutting parts use the central line of blade central through hole is rotational symmetry and arranges as the center pin, lie in two on the reaming blade position between the cutting parts forms two blade chip grooves respectively.
7. The adjustable borehole aperture drill bit of claim 6, wherein: the blade center through hole is cylindrical hole, be close to on the cutting portion follow in the inner wall surface of blade center through hole the bottom plane of reaming blade is local conical surface and local cylindrical surface in proper order to the blade of cutting portion, be close to in the local conical surface one end of the bottom plane of reaming blade corresponds the circular arc aperture and is less than the other end and corresponds the circular arc aperture.
8. The adjustable borehole aperture drill bit of claim 6, wherein: and a head chip groove is formed between the groove wall of the mounting groove and the outer wall of the head of the drill bit, and is communicated with the corresponding blade chip groove.
9. The adjustable borehole aperture drill bit of any of claims 1-8, wherein: the drill bit is characterized in that the outer walls of two opposite sides of the drill bit head are respectively provided with the mounting grooves, the two mounting grooves are arranged in an axisymmetric mode by taking the central line of the drill bit head as a central axis, the two reaming blades are respectively mounted in the two mounting grooves through two screws, and each mounting groove is internally provided with one or more gaskets.
10. The adjustable borehole aperture drill bit of claim 9, wherein: the two opposite sides of the drill bit head are respectively the outer edge of the drill bit head, and the two mounting grooves are respectively arranged on the surfaces of the two outer edges of the drill bit head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220200051.9U CN216632706U (en) | 2022-01-25 | 2022-01-25 | Drill bit with adjustable drilling hole diameter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220200051.9U CN216632706U (en) | 2022-01-25 | 2022-01-25 | Drill bit with adjustable drilling hole diameter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216632706U true CN216632706U (en) | 2022-05-31 |
Family
ID=81728320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220200051.9U Active CN216632706U (en) | 2022-01-25 | 2022-01-25 | Drill bit with adjustable drilling hole diameter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216632706U (en) |
-
2022
- 2022-01-25 CN CN202220200051.9U patent/CN216632706U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: No. 55, Middle Oucheng Road, Qingquan Town, Qingbaijiang District, Chengdu, 610000, Sichuan (European Industrial City) Patentee after: Chengdu Fengyi Yinhu CNC Tool Co.,Ltd. Address before: 610000 1st and 2nd floors, block g, No. 6668, Section 2, Qingquan Avenue, Qingbaijiang District, Chengdu, Sichuan (European industrial city) Patentee before: Chengdu Fengyi Yinhu CNC Tool Co.,Ltd. |
|
| CP02 | Change in the address of a patent holder | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A drill bit with adjustable drilling hole diameter Granted publication date: 20220531 Pledgee: Chengdu SME financing Company Limited by Guarantee Pledgor: Chengdu Fengyi Yinhu CNC Tool Co.,Ltd. Registration number: Y2024980010727 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |