CN211840244U - Small hole deep hole drill - Google Patents
Small hole deep hole drill Download PDFInfo
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- CN211840244U CN211840244U CN201922419904.9U CN201922419904U CN211840244U CN 211840244 U CN211840244 U CN 211840244U CN 201922419904 U CN201922419904 U CN 201922419904U CN 211840244 U CN211840244 U CN 211840244U
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Abstract
The utility model discloses a pinhole deep hole bores, including stalk portion, the portion of keeping away and the cutting part that connects gradually, stalk portion and the portion of keeping away set up to cylindric, the diameter of cutting part is less than the diameter of stalk portion, and be greater than the diameter of the portion of keeping away, the length of cutting part with the length proportion of the portion of keeping away is in 0.76 to 0.79 within range. The utility model discloses can ensure that cutting force is even in the course of working, reduce the size error in aperture.
Description
Technical Field
The utility model relates to a parts machining's technical field, in particular to aperture deep hole bores.
Background
In cell-phone, earphone accessory processing field, to some parts that have deep hole equipment requirement, for example have the earphone hinge hole processing of equipment requirement, generally use the deep hole to bore, the sword length can cause the aperture unstability with avoiding the space position when unreasonable, and the upper and lower off normal in drill way, causes the assembly size unqualified, influences corresponding function and realizes, even unable assembly.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a small hole deep hole bores can ensure that cutting force is even in the course of working, reduces the size error in aperture.
According to the utility model discloses a pinhole deep hole bores, including stalk portion, keep away vacancy portion and the cutting part that connects gradually, stalk portion and keep away vacancy portion set up to cylindric, the diameter of cutting part is less than the diameter of stalk portion, and be greater than the diameter of keeping away vacancy portion, the length of cutting part with the length proportion of keeping away vacancy portion is in 0.76 to 0.79 within range.
According to the utility model discloses aperture deep hole bores has following beneficial effect at least: the shank and the clearance part of the small-hole deep hole drill are arranged to be cylindrical, the diameter of the blade part is larger than that of the clearance part and smaller than that of the shank, the length ratio of the blade part to the clearance part is in the range of 0.76-0.79, the length of the blade part and the length of the clearance part are arranged in the proper ratio range, the cutting force is uniform in processing when a workpiece is processed, the integral stability in the drilling process can be well kept, and therefore the size error of the hole diameter is reduced.
According to some embodiments of the invention, the length of the blade is in the range of 6.9mm to 7.1 mm.
According to some embodiments of the invention, the length of the keep-away portion is set in the range of 9mm to 9.1 mm.
According to some embodiments of the invention, the diameter of the blade is in the range of 0.930mm to 0.940 mm.
According to some embodiments of the invention, the diameter of the clearance portion is in the range of 0.89mm to 0.91 mm.
According to some embodiments of the present invention, the nose angle a on the blade portion is in a range of 116 degrees to 118 degrees.
According to some embodiments of the invention, the number of cutting edges on the blade is two.
According to some embodiments of the invention, the diameter of the handle is in the range of 3.99mm to 4.01 mm.
According to some embodiments of the invention, the total length of the shank, the clearance portion and the blade portion is in the range of 48mm to 52 mm.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic view of a small-hole deep hole drill according to an embodiment of the present invention;
fig. 2 is a schematic view of a small-hole deep-hole drill with a tool tip angle according to an embodiment of the present invention.
Reference numerals:
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
In the field of processing accessories such as mobile phones and earphones, a plurality of holes with small hole diameter and deep depth are arranged, and the holes need to be drilled by a hole drill with small diameter. However, the hole drill is generally composed of the shank 100, the clearance portion 200 and the blade 300, and since the diameters of the clearance portion 200 and the blade 300 are set to be small according to the hole diameter to be machined, if the length ratio of the blade 300 and the clearance portion 200 is not reasonable, the hole diameter machining is easily failed due to the unstable stress during the machining.
Referring to fig. 1 and 2, the small hole deep hole drill according to an embodiment of the present invention includes a shank 100, a clearance 200, and a blade 300 connected in sequence, wherein the shank 100 and the clearance 200 are configured to be cylindrical, the diameter of the blade 300 is smaller than that of the shank 100 and larger than that of the clearance 200, and the length ratio of the blade 300 to that of the clearance 200 is in the range of 0.76 to 0.79.
According to the utility model discloses aperture deep hole bores has following beneficial effect at least: the shank 100 and the clearance 200 of the small-hole deep hole drill are arranged in a cylindrical shape, the diameter of the blade part 300 is larger than that of the clearance 200 and smaller than that of the shank 100, the ratio of the length of the blade part 300 to that of the clearance 200 is in the range of 0.76 to 0.79, and the length of the blade part 300 and that of the clearance 200 are arranged in the above-mentioned appropriate ratio range, so that the wobble of the hole drill can be reduced when a workpiece is machined, the cutting force is uniform in machining, the integral stability in the drilling process can be well maintained, and the dimension error of the hole diameter can be reduced.
The total length of the conventional small-hole drill blade 300 and the recess 200 is within 12mm, such a drill blade 300 is short and has low machining efficiency, if the length of the blade 300 is increased at will, the stability of the drill during machining is reduced, and in order to improve the stability of the drill during machining and improve the machining efficiency, in some embodiments of the present invention, the length of the blade 300 is set within the range of 6.9mm to 7.1mm, the length of the recess 200 is set within the range of 9mm to 9.1mm, the diameter of the blade 300 is set within the range of 0.930mm to 0.940mm, the diameter of the recess 200 is set within the range of 0.89mm to 0.91mm, the cutting tip angle a on the blade 300 is within the range of 116 degrees to 118 degrees, the number of the cutting blades on the blade 300 is set to two, the diameter of the shank 100 is set within the range of 3.99mm to 4.01mm, the shank 100, The total length of the evacuation portion 200 and the blade 300 is in the range of 48mm to 52 mm.
Preferably, the length of the blade 300 is set to 7mm, the length of the clearance portion 200 is set in the range of 9mm to 9.1mm, the diameter of the blade 300 is set to 0.935mm, the diameter of the clearance portion 200 is set to 0.9mm, the nose angle a on the blade 300 is set to 118 degrees, the number of blades on the blade 300 is set to two, the diameter of the handle 100 is set in the range of 4.00mm, and the total length of the handle 100, the clearance portion 200 and the blade 300 is set in the range of 50 mm. Through so setting up, the cutting part 300 all sets up with the length of keeping away void portion 200 longer to the proportion is suitable, can ensure in the drilling that the cutting force is even, reduces the size error in aperture, can guarantee the cutting effect, the chip removal that again can be fine has promoted machining efficiency, has guaranteed the good quality of product well.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (9)
1. The utility model provides a small hole deep hole bores which characterized in that: including stalk portion, keep away vacancy portion and the cutting part that connects gradually, stalk portion and keep away vacancy portion set up to cylindricly, the diameter of cutting part is less than the diameter of stalk portion to be greater than the diameter of keeping away vacancy portion, the length of cutting part with the length proportion of keeping away vacancy portion is in 0.76 to 0.79 within range.
2. The small-hole deep-hole drill according to claim 1, characterized in that: the length of the blade is in the range of 6.9mm to 7.1 mm.
3. The small-hole deep-hole drill according to claim 1, characterized in that: the length of the space-avoiding part is set in the range of 9mm to 9.1 mm.
4. The small-hole deep-hole drill according to claim 1, characterized in that: the diameter of the blade is in the range of 0.930mm to 0.940 mm.
5. The small-hole deep-hole drill according to claim 1, characterized in that: the diameter of the void-avoiding portion is in the range of 0.89mm to 0.91 mm.
6. The small-hole deep-hole drill according to claim 1, characterized in that: the angle a of the knife edge on the blade part is in the range of 116 degrees to 118 degrees.
7. The small-hole deep-hole drill according to claim 1, characterized in that: the number of the blades on the blade part is two.
8. The small-hole deep-hole drill according to claim 1, characterized in that: the diameter of the shank is in the range of 3.99mm to 4.01 mm.
9. The small-hole deep-hole drill according to claim 1, characterized in that: the total length of the shank, the clearance portion and the blade is in the range of 48mm to 52 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922419904.9U CN211840244U (en) | 2019-12-26 | 2019-12-26 | Small hole deep hole drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922419904.9U CN211840244U (en) | 2019-12-26 | 2019-12-26 | Small hole deep hole drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211840244U true CN211840244U (en) | 2020-11-03 |
Family
ID=73209535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922419904.9U Active CN211840244U (en) | 2019-12-26 | 2019-12-26 | Small hole deep hole drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211840244U (en) |
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2019
- 2019-12-26 CN CN201922419904.9U patent/CN211840244U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |