CN108577987B - Hard alloy turning needle for dental rotary instrument - Google Patents
Hard alloy turning needle for dental rotary instrument Download PDFInfo
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- CN108577987B CN108577987B CN201810393533.9A CN201810393533A CN108577987B CN 108577987 B CN108577987 B CN 108577987B CN 201810393533 A CN201810393533 A CN 201810393533A CN 108577987 B CN108577987 B CN 108577987B
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- cutting edge
- cutting
- working part
- rotary instrument
- dental rotary
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C3/00—Dental tools or instruments
- A61C3/02—Tooth drilling or cutting instruments; Instruments acting like a sandblast machine
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- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Dentistry (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
The invention discloses a hard alloy turning needle of a dental rotary instrument. The dental rotary instrument comprises a handle and a working part, wherein the handle is connected with a dental rotary instrument, the working part is connected with the handle, and an end cutting edge and a chip groove are arranged on the working part; the cutting angle of the front tool face of the end cutting edge of the working part is fitted through the process of fitting the dentin by the double cubic B spline curve to the cutting angle of the front tool face of the end cutting edge, and the parameter form of the curve is as follows: b (t) =p 0 (1‑t) 3 +3P 1 t(1‑t) 2 +3P 2 t 2 (1‑t)+P 3 t 3 ，t∈[0，1]Wherein P is 0 For the starting point of the end cutting edge, P 3 For the end edge termination point, P 1 P when dentin is peeled off 0 Points in the direction of movement, P 2 P when dentin is peeled off 3 Points in the direction of motion, the curve starting at P 0 Trend P 1 And from P 2 The direction of (c) is terminated by P 3 . According to the invention, cutting fluid can be collected to a center point by cutting and directing to the center of the parabola to automatically cut, so that the cooling and cutting discharging functions of cutting are accelerated. Through the cutting edge angle setting, the phenomenon of accumulation and cutting on the surface of the cutting edge of the front cutter surface is avoided, and the service life of the cutter is prolonged.
Description
Technical field:
the invention belongs to the technical field of medical equipment, and particularly relates to a hard alloy turning needle of a dental rotary instrument.
The background technology is as follows:
in the current dentistry, the turning needle on the dental rotary instrument is generally used for stripping dentin, and the cutting angle of the cutting edge at the end part of the turning needle is limited, so that chip removal is often not smooth, and stripping efficiency is affected. In addition, in order to reduce the damage to gum and enamel, people adopt an arc surface at the end of the cutting edge of the end part of the needle, but in actual use, cutting fluid is dispersed, and the cutting cooling efficiency is reduced.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.
The invention comprises the following steps:
the invention aims to provide a hard alloy turning needle of a dental rotary instrument, so as to overcome the defects in the prior art.
To achieve the above object, the present invention provides a cemented carbide turning needle for a dental rotary instrument, comprising: the dental rotary instrument comprises a handle and a working part, wherein the handle is connected with the dental rotary instrument, the working part is connected with the handle, and an end cutting edge and a chip groove are arranged on the working part; the cutting angle of the front tool face of the end cutting edge of the working part is fitted through the process of fitting the dentin by the double cubic B spline curve to the cutting angle of the front tool face of the end cutting edge, and the parameter form of the curve is as follows:
B(t)＝P 0 (1-t) 3 +3P1 t (1-t) 2 +3P 2 t 2 (1-t)+P 3 t 3 ，t∈[0，1]
wherein P is 0 For the starting point of the end cutting edge, P 3 For the end edge termination point, P 1 P when dentin is peeled off 0 Points in the direction of movement, P 2 P when dentin is peeled off 3 Points in the direction of motion, the curve starting at P 0 Trend P 1 And from P 2 The direction of (c) is terminated by P 3 。
Preferably, in the technical scheme, the front cutter surface and the chip groove of the cutting edge at the end part of the working part of the hard alloy turning needle are of a parabolic structure, and the center point of the parabolic structure is arranged outside the hard alloy turning needle, namely, on the surface of the cut object.
Preferably, in the technical scheme, the high cutting rate cutting edge angle of the rake face is 15.36 degrees, and the high wear resistance cutting edge angle is 38.56 degrees.
Preferably, in the technical scheme, the hard alloy turning needle working part is one of a spherical head, an inverted truncated cone-shaped head, a pear-shaped head, a cylindrical split groove-shaped head, a cylindrical hemispherical split groove-shaped head, a truncated cone split groove-shaped head, a conical hemispherical split groove-shaped head, a wheel-shaped head, a cross file cylindrical head and a cross file conical head.
Compared with the prior art, the invention has the following beneficial effects:
the hard alloy turning needle of the dental rotary instrument can collect cutting fluid on the surface of a cutting object through a parabolic structure of a front cutter surface and a chip removal groove of an end cutting edge, so that the cooling and cutting discharging functions of cutting are accelerated. Through the cutting edge angle setting, the phenomenon of accumulation and cutting on the surface of the cutting edge of the front cutter surface is avoided, and the service life of the cutter is prolonged.
Description of the drawings:
FIG. 1 is a front view of a cemented carbide needle structure of a dental rotary instrument of the present invention;
the reference numerals are: 1-handle, 2-working part, 3-end cutting edge, 4-paraboloid.
The specific embodiment is as follows:
the following detailed description of specific embodiments of the invention is, but it should be understood that the invention is not limited to specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations thereof such as "comprises" or "comprising", etc. will be understood to include the stated element or component without excluding other elements or components.
As shown in fig. 1, the hard alloy turning needle of the dental rotary instrument comprises a handle 1 and a working part 2, wherein the handle 1 is connected with the dental rotary instrument, the working part 2 is connected with the handle 1, and an end cutting edge 3 and a chip groove are arranged on the working part 2; the cutting angle of the front tool face of the end cutting edge 3 is fitted by the working part 2 end cutting edge 3 through a bicubic B spline curve fitting dentin stripping process, and the parameter form of the curve is as follows:
B(t)＝P 0 (1-t) 3 +3P 1 t(1-t) 2 +3P 2 t 2 (1-t)+P 3 t 3 ，t∈[0，1]
wherein P is 0 For the start point of the end cutting edge 3, P 3 For the end edge 3 to end point, P 1 P when dentin is peeled off 0 Points in the direction of movement, P 2 P when dentin is peeled off 3 Points in the direction of motion, the curve starting at P 0 Trend P 1 And from P 2 The direction of (c) is terminated by P 3 . The front knife face and the chip groove of the cutting edge 3 at the end part of the working part 2 of the hard alloy turning needle are of a parabolic 4 structure, the center point of the parabolic 4 is arranged outside the hard alloy turning needle, namely, on the surface of a cut object, cooling liquid can be rapidly cooled when the cooling liquid is directed to the turning needle, the cut teeth can be rapidly cooled, and in the cutting process, cut dental debris can be rapidly thrown out to form accumulation and cutting when striking the parabolic 4 structure of the turning needle. The angle of the cutting edge of the rake face with high cutting rate is 15.36 degrees, the angle of the cutting edge with high wear resistance is 38.56 degrees, the phenomenon of accumulation and cutting on the surface of the cutting edge of the rake face is avoided, and the service life of the cutter is prolonged.
The hard alloy turning needle working part 2 is one of a spherical head, an inverted truncated conical head, a pear-shaped head, a cylindrical split groove head, a cylindrical hemispherical split groove head, a truncated conical split groove head, a conical hemispherical split groove head, a wheel-shaped head, a cross file cylindrical head and a cross file conical head.
The foregoing descriptions of specific exemplary embodiments of the present invention are presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application to thereby enable one skilled in the art to make and utilize the invention in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (3)
1. A dental rotary instrument carbide needle, characterized in that: the dental rotary instrument comprises a handle and a working part, wherein the handle is connected with a dental rotary instrument, the working part is connected with the handle, and an end cutting edge and a chip groove are arranged on the working part; the cutting angle of the front tool face of the end cutting edge of the working part is fitted through the process of fitting the dentin by the double cubic B spline curve to the cutting angle of the front tool face of the end cutting edge, and the parameter form of the curve is as follows:
B(t)＝P 0 (1-t) 3 +3P 1 t(1-t) 2 +3P 2 t 2 (1-t)+P 3 t 3 ，t∈[0，1]
wherein P is 0 For the starting point of the end cutting edge, P 3 For the end edge termination point, P 1 P when dentin is peeled off 0 Points in the direction of movement, P 2 P when dentin is peeled off 3 Points in the direction of motion, the curve starting at P 0 Trend P 1 And from P 2 The direction of (c) is terminated by P 3 。
2. The dental rotary instrument cemented carbide needle of claim 1, wherein: the front knife face and the chip groove of the cutting edge at the end part of the working part of the hard alloy turning needle are both in a parabolic structure, and the center point of the parabolic structure is arranged outside the hard alloy turning needle, namely, on the surface of an object to be cut.
3. The dental rotary instrument cemented carbide needle of claim 2, wherein: the cutting edge angle of the rake face with high cutting rate is 15.36 degrees, and the cutting edge angle with high wear resistance is 38.56 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810393533.9A CN108577987B (en) | 2018-04-27 | 2018-04-27 | Hard alloy turning needle for dental rotary instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810393533.9A CN108577987B (en) | 2018-04-27 | 2018-04-27 | Hard alloy turning needle for dental rotary instrument |
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| Publication Number | Publication Date |
|---|---|
| CN108577987A CN108577987A (en) | 2018-09-28 |
| CN108577987B true CN108577987B (en) | 2023-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810393533.9A Active CN108577987B (en) | 2018-04-27 | 2018-04-27 | Hard alloy turning needle for dental rotary instrument |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN210784803U (en) * | 2019-09-09 | 2020-06-19 | 四川大学 | A reserve stop degree of depth demarcation drill point for tooth body prepares on 3D prints baffle |
Citations (5)
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|---|---|---|---|---|
| JP2012179370A (en) * | 2000-04-19 | 2012-09-20 | Orametrix Inc | Interactive orthodontic care system based on intra-oral scanning of teeth |
| CN102768764A (en) * | 2012-03-26 | 2012-11-07 | 新奥特（北京）视频技术有限公司 | Method for smoothing image on basis of Bezier curve |
| CN104287858A (en) * | 2014-09-26 | 2015-01-21 | 杭州一牙数字口腔有限公司 | Method for cutting bracket-free invisible appliance |
| DE102014203449A1 (en) * | 2014-02-26 | 2015-09-10 | Gebr. Brasseler Gmbh & Co. Kg | Dental instrument |
| CN107085412A (en) * | 2017-03-30 | 2017-08-22 | 北京精密机电控制设备研究所 | A kind of method of controlling curve turnery processing cutting force mutation |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7074038B1 (en) * | 2000-12-29 | 2006-07-11 | Align Technology, Inc. | Methods and systems for treating teeth |
| MXPA05003194A (en) * | 2002-09-26 | 2005-06-08 | Ormco Corp | Custom orthodontic appliance system and method. |
-
2018
- 2018-04-27 CN CN201810393533.9A patent/CN108577987B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012179370A (en) * | 2000-04-19 | 2012-09-20 | Orametrix Inc | Interactive orthodontic care system based on intra-oral scanning of teeth |
| CN102768764A (en) * | 2012-03-26 | 2012-11-07 | 新奥特（北京）视频技术有限公司 | Method for smoothing image on basis of Bezier curve |
| DE102014203449A1 (en) * | 2014-02-26 | 2015-09-10 | Gebr. Brasseler Gmbh & Co. Kg | Dental instrument |
| CN104287858A (en) * | 2014-09-26 | 2015-01-21 | 杭州一牙数字口腔有限公司 | Method for cutting bracket-free invisible appliance |
| CN107085412A (en) * | 2017-03-30 | 2017-08-22 | 北京精密机电控制设备研究所 | A kind of method of controlling curve turnery processing cutting force mutation |
Non-Patent Citations (2)
| Title |
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| 一种基于STL模型的5轴高速加工刀轨优化策略;孙全平;陈前亮;;工程图学学报(05);全文 * |
| 实现牙体预备触觉交互仿真的图形显示;刘冠阳;张玉茹;;计算机工程与应用(06);全文 * |
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| Publication number | Publication date |
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| CN108577987A (en) | 2018-09-28 |
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Effective date of registration: 20220920 Address after: Room 501, No. 1719-18, Huishan Avenue, Huishan Economic Development Zone, Wuxi, Jiangsu 214000 Applicant after: Gaofeng medical equipment (Wuxi) Co.,Ltd. Address before: No. 3, Beijiang, Mazhen Industrial Park, Xuxiake Town, Jiangyin City, Wuxi City, Jiangsu Province, 214406 Applicant before: JIANGYIN GAOFENG MEDICAL CO.,LTD. |
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