CN101982278A - Microminiature Extended staggered tooth hobbing cutter - Google Patents
Microminiature Extended staggered tooth hobbing cutter Download PDFInfo
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- CN101982278A CN101982278A CN 201010511470 CN201010511470A CN101982278A CN 101982278 A CN101982278 A CN 101982278A CN 201010511470 CN201010511470 CN 201010511470 CN 201010511470 A CN201010511470 A CN 201010511470A CN 101982278 A CN101982278 A CN 101982278A
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- tooth
- microminiature
- hobbing cutter
- hobboing cutter
- processing
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Abstract
Reasonable design of micronimiature hobbing cutter is basis and premise for processing high accuracy microminiature gear. The invention provides a microminiature hobbing cutter design new way, namely a microminiature extended staggered tooth hobbing cutter, aiming at solving the problems that gear processing and relief grinding of microminiature hobbing cutter are difficult, processing error is big and service life is short. Compared with common hobbing cutter, the microminiature hobbing cutter (modulus m is less than or equal to 0.05mm) has the advantages that the tooth is extended into the interior of hobbing cutter, a chip pocket is deepened, so that chip space is increased, tooth pitch is doubled, so that hobbing cutter is easy for relief grinding, processing error is small, and tooth strength and rigidity are improved; compared with tooth-leap processing method, processing efficiency and accuracy are greatly improved, and microminiature involute gears which have any tooth number, meet the requirements and are made by high strength material can be processed without adjusting index.
Description
Technical field
The present invention relates to a kind of Tool Design method, is specially at the method for designing of the microminiature hobboing cutter of the microminiature involute gear of processing modulus m≤0.05mm.
Background technology
Modulus is commonly referred to as the microminiature gear less than the gear of 0.1mm, in the microminiature precision drive in fields such as Aeronautics and Astronautics, weapons, precision instrument, dexterous mechanism and the MEMS, often uses this microminiature gear.The machining accuracy of microminiature gear will directly influence the precision and the performance of overall system.
Gear hobbing is more a kind of processing method of using in the present Gear Processing, and the production efficiency height uses general.Hobboing cutter and gear hobbing equipment are the core parts of hobbing method for processing, are the keys that guarantees the Gear Processing profile accuracy.The appropriate design of microminiature hobboing cutter is basis and the prerequisite that processes high accuracy microminiature gear.
Modulus can design by inquiry national standard, utilization traditional formula, but for the hobboing cutter of modulus less than 0.1mm, it and common hobboing cutter has very big difference more than or equal to the hobboing cutter of 0.1mm.After the hobboing cutter size was dwindled, tooth root portion relief grinding is difficulty further, and it is big that mismachining tolerance becomes, and the miniature hobboing cutter life-span is short, and wearing and tearing are difficult for refacing later.Therefore to the design of microminiature hobboing cutter, address the above problem and be still a difficult problem.
Summary of the invention
Make difficulty, especially tooth root portion relief grinding difficulty at the microminiature hobboing cutter; Mismachining tolerance became big and the life-span weak point after size was dwindled, and the shortcoming that is difficult for refacing after the wearing and tearing proposes a kind of microminiature hobboing cutter design new approaches---extend side set microminiature hobboing cutter.Its basic principle is that double-thread hob tooth length is to the inboard extension of hobboing cutter; Remove a tooth every a tooth, tooth pitch doubles; Whole teeth on the same toothrow belong to same the tooth on the helix, tooth on adjacent two rows is the tooth on the different helixes, as shown in Figure 1, extend on the side set microminiature hobboing cutter and have two helix I and II, (a) for extending the axial tooth profile and the orthodont double-thread hob axial tooth profile comparison diagram of a certain toothrow of side set microminiature hobboing cutter (if the tooth on should arranging is the tooth on the helix I entirely), wherein i is the tooth on first helix of orthodont double-thread hob; (b) be tooth (tooth on this row is the tooth on the helix II entirely) and orthodont hobboing cutter axial tooth profile comparison diagram on its adjacent row, wherein ii is the tooth on second helix of orthodont double-thread hob.As seen from the figure, extend side set microminiature hobboing cutter fully teeth height greater than orthodont hobboing cutter fully teeth height; Extending side set hobboing cutter normal pitch is the twice of orthodont hobboing cutter normal pitch.
It is as follows to extend side set microminiature hobboing cutter fully teeth height computing formula:
Extend side set microminiature hobboing cutter fully teeth height h
0=h+ Δ h=h+kh=(1+k) h, h are orthodont hobboing cutter fully teeth height, and k is a lengthening coefficient, and the rigidity requirement when it is worth according to workpiece material and cutting is decided.
Description of drawings
Accompanying drawing 1 is for extending side set microminiature hobboing cutter and orthodont double-thread hob axial tooth profile comparison diagram.
Accompanying drawing 2 is the extension side set microminiature hobboing cutter axial tooth profile figure of modulus 0.05mm.
The specific embodiment
This explanation is that example describes with the microminiature hobboing cutter of processing following gear (material is a copper):
Modulus m
n=0.05mm, number of teeth z=41, modification coefficient ξ=0, lead angle β=0 °, pressure angle of graduated circle α
n=20 °, addendum coefficient
The height of teeth root coefficient
Thickness B=0.4mm.
Adopt the microminiature hobboing cutter that extends interlocking tooth method design structure.The hobboing cutter axial tooth profile of designing as shown in Figure 2.Tooth depth extends to 0.200mm (fully teeth height h
0=0.2000mm), hobboing cutter basic worm helical pitch is 0.314mm.
Extend side set microminiature hobboing cutter fully teeth height h
0Calculate:
Orthodont hobboing cutter fully teeth height h=h
a+ h
f=(1.2+0.25) m
n+ m
n=2.45m
n=0.1225mm
Extend side set microminiature hobboing cutter fully teeth height h
0=h+ Δ h=h+kh=(1+k) h, k is a lengthening coefficient, the rigidity requirement when it is worth according to workpiece material and cutting is decided, and gets 0.8. at this k
Then extend side set microminiature hobboing cutter fully teeth height h
0=(1+k) h=1.8 * 0.1225=0.2205mm
Through rounding, h
0Get 0.200mm.
As shown in table 1 through calculating microminiature hobboing cutter parameter.
Table 1 extends side set microminiature hobboing cutter parameter list
Claims (2)
- A kind of microminiature hobboing cutter (method for designing of modulus m≤0.05mm) is characterized in that:1. microminiature hobboing cutter tooth depth makes relief grinding easy to the inner extension of hobboing cutter, and cutter tooth cutting angle and profile accuracy guarantee that easily tooth portion strength and stiffness improve.
- 2. the microminiature hobboing cutter adopts the side set structure, promptly(1) the chip pocket number of hobboing cutter is an integer with the ratio of its number of starts.(2) remove a tooth every a tooth, tooth pitch increases and is twice.(3) the whole teeth on the same toothrow belong to the tooth on the same head thread; Tooth on adjacent two rows is the tooth on the different helixes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010511470 CN101982278A (en) | 2010-10-19 | 2010-10-19 | Microminiature Extended staggered tooth hobbing cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010511470 CN101982278A (en) | 2010-10-19 | 2010-10-19 | Microminiature Extended staggered tooth hobbing cutter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101982278A true CN101982278A (en) | 2011-03-02 |
Family
ID=43619198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010511470 Pending CN101982278A (en) | 2010-10-19 | 2010-10-19 | Microminiature Extended staggered tooth hobbing cutter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101982278A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102528176A (en) * | 2012-01-13 | 2012-07-04 | 北京理工大学 | Single-headed staggered-toothed microminiature hob based on extension whole depth strength design |
| CN104117721A (en) * | 2013-04-27 | 2014-10-29 | 陕西飞机工业（集团）有限公司 | Novel insection hob |
| CN107363301A (en) * | 2017-08-01 | 2017-11-21 | 北京理工大学 | One kind becomes the thick change groove width small hole drilling cutters of core and its grinding method |
| CN112238270A (en) * | 2020-10-23 | 2021-01-19 | 东风汽车有限公司 | Hobbing cutter for processing ratchet of speed reducing mechanism |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1037314A (en) * | 1962-05-24 | 1966-07-27 | Hurth Masch Zahnrad Carl | An improved profile cutter or hob |
| US4322185A (en) * | 1979-07-16 | 1982-03-30 | Kabushiki Kaisha Kobe Seiko Sho | Staggered hob |
| CN1586779A (en) * | 2004-10-21 | 2005-03-02 | 上海汽车股份有限公司 | Method for improving preshaving hob |
| CN201049407Y (en) * | 2007-04-11 | 2008-04-23 | 中国北车集团永济电机厂 | Spiral groove staggered tooth comb milling cutter |
| CN201471014U (en) * | 2009-07-16 | 2010-05-19 | 江阴市工具厂 | Hard-alloy fine-pitch gear hob |
-
2010
- 2010-10-19 CN CN 201010511470 patent/CN101982278A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1037314A (en) * | 1962-05-24 | 1966-07-27 | Hurth Masch Zahnrad Carl | An improved profile cutter or hob |
| US4322185A (en) * | 1979-07-16 | 1982-03-30 | Kabushiki Kaisha Kobe Seiko Sho | Staggered hob |
| CN1586779A (en) * | 2004-10-21 | 2005-03-02 | 上海汽车股份有限公司 | Method for improving preshaving hob |
| CN201049407Y (en) * | 2007-04-11 | 2008-04-23 | 中国北车集团永济电机厂 | Spiral groove staggered tooth comb milling cutter |
| CN201471014U (en) * | 2009-07-16 | 2010-05-19 | 江阴市工具厂 | Hard-alloy fine-pitch gear hob |
Non-Patent Citations (1)
| Title |
|---|
| 《工具技术》 19921222 黄承光 错齿滚刀的设计与制造 , 第12期 2 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102528176A (en) * | 2012-01-13 | 2012-07-04 | 北京理工大学 | Single-headed staggered-toothed microminiature hob based on extension whole depth strength design |
| CN104117721A (en) * | 2013-04-27 | 2014-10-29 | 陕西飞机工业（集团）有限公司 | Novel insection hob |
| CN107363301A (en) * | 2017-08-01 | 2017-11-21 | 北京理工大学 | One kind becomes the thick change groove width small hole drilling cutters of core and its grinding method |
| CN112238270A (en) * | 2020-10-23 | 2021-01-19 | 东风汽车有限公司 | Hobbing cutter for processing ratchet of speed reducing mechanism |
| CN112238270B (en) * | 2020-10-23 | 2022-03-15 | 东风汽车零部件(集团)有限公司刃量具分公司 | Hobbing cutter for processing ratchet of speed reducing mechanism |
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Application publication date: 20110302 |