CN103438856B - The measuring method of front angle of circumferential edge of spiral groove numerical control end mill - Google Patents
The measuring method of front angle of circumferential edge of spiral groove numerical control end mill Download PDFInfo
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- CN103438856B CN103438856B CN201310424714.0A CN201310424714A CN103438856B CN 103438856 B CN103438856 B CN 103438856B CN 201310424714 A CN201310424714 A CN 201310424714A CN 103438856 B CN103438856 B CN 103438856B
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Abstract
The invention provides a kind of measuring method of front angle of circumferential edge of spiral groove numerical control end mill, first calculate the Measurement accuracy length d of circumference angle of cutting edge on rake face, i.e. d=d ＇-r; Calculate the projected length l of Measurement accuracy length on basal plane of circumference angle of cutting edge again, i.e. l=? l ＇-r-r × sin(arccos((l ＇-r) ÷ d)); The circumference angle of cutting edge γ finally obtained be with the Measurement accuracy length d of anterior angle on rake face be hypotenuse, be adjacent side with the projected length l of the Measurement accuracy length of anterior angle on basal plane angle, γ=arcsin(l ÷ d) <b>=</bGreatT.Gr eaT.GTarcsin((l ＇-r-r × sin(arccos((l ＇-r) ÷ d))) ÷ (d ＇-r)).The measuring error adopting the present invention to obtain is much less than the measuring error adopting traditional measurement method to obtain.
Description
Technical field
The present invention relates to a kind of measuring method of front angle of circumferential edge of spiral groove numerical control end mill, belong to field of machining.
Background technology
Along with numerically-controlled machine, especially CNC milling machine is universal, and the application of numerical control end mill is also more and more extensive, and demand is also increasing, and the structure of most of numerical control end mill is helicla flute numerical control end mill.Due to the application of the typical difficult-to-machine materials such as titanium alloy, high temperature alloy, super-strength steel, make the requirement of present stage to numerical control end mill cutting ability also more and more higher.And the cutting ability of cutter is main relevant with the structural parameters of cutter except cutter material, wherein topmost structural parameters are numerical control end mill circumference angle of cutting edge, and it directly affects cutting ability and the serviceable life of cutter.Rake face due to spiral cutting sword is spiral camber, cannot Measurement accuracy, can only indirectly, approximate measurement, therefore can accurately the cutting ability of stoichiometric number control slotting cutter reality, have impact on the research and apply to numerical control end mill, more have impact on working (machining) efficiency and the precision of the typical difficult-to-machine materials such as titanium alloy, high temperature alloy, super-strength steel.
The measuring method of traditional front angle of circumferential edge of spiral groove numerical control end mill be with the actual measurement length of anterior angle on rake face be hypotenuse, be adjacent side with the projected length of actual measurement length on basal plane of anterior angle on rake face angle, i.e. arccos(l ＇ ÷ d ＇).Above-mentioned measuring method measuring error is larger.
Summary of the invention
For above deficiency, the invention provides a kind of measuring method of front angle of circumferential edge of spiral groove numerical control end mill.
Technical scheme of the present invention: the measuring method of front angle of circumferential edge of spiral groove numerical control end mill, is achieved through the following technical solutions:
(1) the Measurement accuracy length d of circumference angle of cutting edge on rake face is calculated: the arc radius r measurement length d ＇ of the actual anterior angle recorded on rake face being deducted a point of a knife place, i.e. d=d ＇-r;
(2) the projected length l of Measurement accuracy length on basal plane: the arc radius r actual measurement length projected length l ＇ on basal plane of anterior angle on rake face being deducted a point of a knife place of circumference angle of cutting edge is calculated, deduct one again with the Measurement accuracy length d of anterior angle on rake face for hypotenuse, the product of the sine value of angle that the difference of the arc radius r at a point of a knife place is adjacent side and the arc radius r at point of a knife place is deducted with the projected length l ＇ of actual measurement length on basal plane of anterior angle on rake face, i.e. l=l ＇-r-r × sin(arccos((l ＇-r) ÷ d)),
(3) circumference angle of cutting edge γ be with the Measurement accuracy length d of anterior angle on rake face be hypotenuse, be adjacent side with the projected length l of the Measurement accuracy length of anterior angle on basal plane angle, γ=arcsin(l ÷ d)
=arcsin((l ＇-r-r × sin(arccos((l ＇-r) ÷ d))) ÷ (d ＇-r)).
Beneficial effect of the present invention: the measuring error adopting the present invention to obtain is much less than the measuring error adopting traditional measurement method to obtain, especially, when the absolute value of anterior angle is close to 0 °, the needs of numerical control end mill Manufacture and application technology can be better met.
Accompanying drawing explanation
Fig. 1 is helicla flute numerical control end mill front view.
Fig. 2 is the A-A line cut-open view of Fig. 1.
Fig. 3 is the close-up schematic view in I portion in Fig. 2.
1-blade; 2-shank; 3-helix angle; 4-circumference angle of cutting edge; Basal plane in 6-helical edges measurement of angle stationary reference frame and the intersection of A-A section; Cutting plane in 7-helical edges measurement of angle stationary reference frame and the intersection of A-A section; The Measurement accuracy length of 8-circumference angle of cutting edge on rake face; The actual measurement length of 9-circumference angle of cutting edge on rake face; The Measurement accuracy length projected length on basal plane of 10-circumference angle of cutting edge on rake face; The actual measurement length projected length on basal plane of 11-circumference angle of cutting edge on rake face; The anterior angle that the actual measurement of 12-cutter goes out; 13-difference; The arc radius at 14-point of a knife place.
Embodiment
The present embodiment for measure one diameter be 20mm, helix angle is 40 °, circumference angle of cutting edge is 10 °, anterior angle theory measures the 4 sword helicla flute numerical control end mills that length is 0.6mm, the arc radius at point of a knife place is 0.05mm, as shown in Figure 1 to Figure 3.The measurement length d ＇ of the actual anterior angle recorded on rake face is 0.608mm, the projected length l ＇ of the actual measurement length of circumference angle of cutting edge on rake face on basal plane is 0.605mm, then showing that the circumference angle of cutting edge of this cutter obtains measured value according to the computing method of this invention is 9.82 °, and error is only 0.18 °.And adopt traditional computing method, circumference angle of cutting edge be with the actual measurement length of anterior angle on rake face be hypotenuse, the angle that is adjacent side with the projected length of actual measurement length on basal plane of anterior angle on rake face, this angle is arccos(l ＇ ÷ d ＇)=5.69 °, error amount is 4.31 °.From the measurement result of this embodiment, measuring error of the present invention will be far smaller than the measuring error adopting classic method to obtain.
Claims (1)
1. the measuring method of front angle of circumferential edge of spiral groove numerical control end mill, is characterized in that being achieved through the following technical solutions:
(1) the Measurement accuracy length d(8 of circumference angle of cutting edge on rake face is calculated): the arc radius r(14 measurement length d ＇ (9) of the actual anterior angle recorded on rake face being deducted a point of a knife place), i.e. d=d ＇-r;
(2) the projected length l(10 of Measurement accuracy length on basal plane of circumference angle of cutting edge is calculated): the arc radius r(14 actual measurement length projected length l ＇ (11) on basal plane of anterior angle on rake face being deducted a point of a knife place), deduct one again with the Measurement accuracy length d(8 of anterior angle on rake face) for hypotenuse, deduct the arc radius r(14 at a point of a knife place with the projected length l ＇ (11) of actual measurement length on basal plane of anterior angle on rake face) difference be the sine value of the angle of adjacent side and the arc radius r(14 at point of a knife place) product, i.e. l=l ＇-r-r × sin(arccos((l ＇-r) ÷ d)),
(3) circumference angle of cutting edge γ is with the Measurement accuracy length d(8 of anterior angle on rake face) for hypotenuse, with the projected length l(10 of Measurement accuracy length on basal plane of anterior angle) be the angle of adjacent side, γ=arccos(l ÷ d)
=arccos((l ＇-r-r × sin(arccos((l ＇-r) ÷ d))) ÷ (d ＇-r)).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310424714.0A CN103438856B (en) | 2013-09-18 | 2013-09-18 | The measuring method of front angle of circumferential edge of spiral groove numerical control end mill |
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| CN201310424714.0A CN103438856B (en) | 2013-09-18 | 2013-09-18 | The measuring method of front angle of circumferential edge of spiral groove numerical control end mill |
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| CN103438856B true CN103438856B (en) | 2016-02-10 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106643569B (en) * | 2016-12-27 | 2019-02-22 | 中国航发湖南南方宇航工业有限公司 | A kind of angle measurement method of output shaft helicla flute |
| CN113532224B (en) * | 2021-09-15 | 2021-11-23 | 中车戚墅堰机车车辆工艺研究所有限公司 | Hob front cutter face detection method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60133925A (en) * | 1983-12-23 | 1985-07-17 | Mitsubishi Electric Corp | Bending angle measuring method in numerical control device |
| JPS60170710A (en) * | 1984-02-15 | 1985-09-04 | Asahi Optical Co Ltd | Correcting device for error in measured angle |
| CN1354705A (en) * | 1998-11-12 | 2002-06-19 | Yg-1株式会社 | Spherical cutting tool |
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2013
- 2013-09-18 CN CN201310424714.0A patent/CN103438856B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60133925A (en) * | 1983-12-23 | 1985-07-17 | Mitsubishi Electric Corp | Bending angle measuring method in numerical control device |
| JPS60170710A (en) * | 1984-02-15 | 1985-09-04 | Asahi Optical Co Ltd | Correcting device for error in measured angle |
| CN1354705A (en) * | 1998-11-12 | 2002-06-19 | Yg-1株式会社 | Spherical cutting tool |
Non-Patent Citations (1)
| Title |
|---|
| 整体硬质合金立铣刀前角测量方法的优化;张孟恩等;《工具技术》;20130731;第47卷(第7期);第71-74页 * |
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