CN103537751B - A kind of involute spline broach - Google Patents
A kind of involute spline broach Download PDFInfo
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- CN103537751B CN103537751B CN201310509121.4A CN201310509121A CN103537751B CN 103537751 B CN103537751 B CN 103537751B CN 201310509121 A CN201310509121 A CN 201310509121A CN 103537751 B CN103537751 B CN 103537751B
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Abstract
The invention discloses a kind of involute spline broach, its teeth portion comprises helical tooth type cutter tooth section and annular flute profile cutter tooth section, and helical tooth type cutter tooth section is located at the leading portion of teeth portion, is rough cut tooth; Annular flute profile cutter tooth section is located at the back segment of teeth portion, is smart cutting teeth and finishing teeth; The connecting portion of two sections of cutter tooth sections disconnects with support slot form.The cutter tooth design arrangement of broaching tool of the present invention adopts the combination tooth type structures that is combined with circular phase of spiral, in the course of work, cutting force is steady, lathe vibrations are little, draw rear part deformation little, spline precision is high, and cutter manufacture manufacturability is strong, be specially adapted to the wire pulling method of high accuracy internal spline especially short, the thin wall component of spline effective length, as gear sleeve of automobile synchronizer, ring gear etc.
Description
Technical field
The present invention relates to a kind of form broaching cutter, specifically a kind of involute spline broach.
Background technology
Especially generally Broaching Technology is adopted to the machining field of involute inner spline in machining, the formation of involute profile is formed by tooth by increasing progressively of diameter to the cutter tooth do not waited up to a hundred by being distributed in tens on broaching tool, and the structural shape of thus broaching tool cutter tooth arrangement is very important.Tradition broaching tool adopts endless knife toothing, and namely its front edged surface of each cutter tooth of broaching tool in the form of a ring, independent separately, sees Fig. 1.This structure fabrication process is simple, conventional sharpening bed can realize grinding, but the circumferential cutting edge of each cutter tooth is synchronously cut, is synchronously cut out in broaching process, because the circulation change participating in cutwork cutter tooth quantity causes the circulation change of cutting force simultaneously, have in broaching process and to impact and with covibration, cause part deformation large, finished surface fineness is poor, and broaching tool easily damages, when cutting force is larger, broaching machine also easily damages.In recent years along with the appearance of CNC edge grinding machine, adopt the broaching tool of full spiral cutter teeth structural shape to use and increase gradually, see Fig. 2.The front edged surface of this structural shape broaching tool cutter tooth in the shape of a spiral, in broaching process, progressively cut, progressively cut out by cutter tooth cutting edge, because the cutting edge length participating in cutwork is constant simultaneously, cutting force is steady, lathe does not vibrate substantially, and draw rear part deformation little, fineness is good.But also there is a lot of defect in the broaching tool of full spiral cutter teeth structural shape, on the one hand because broaching tool is that repetition reconditioning uses, general reconditioning number of times is more than 10 times, after the existence of cutter tooth relief angle makes to reface, broaching tool diameter diminishes gradually, the direct guarantee affecting the large path size of part spline, large change is there is not with the increase of reconditioning number of times for avoiding broaching tool final diameter size, thus broaching tool is all designed with finishing tooth, finishing teeth, to be progressively transition be finishing tooth tooth liter 0, finishing teeth cylindrical leaves the cylinder land increased progressively from 0.2 ~ 0.8, and finishing tooth, the relief angles of finishing teeth is also little than cutting teeth, the broaching tool cutter tooth relief angle of full spiral cutter teeth structural shape is that a cutter is worn on same helix, different tooth liter cannot be ensured, margin width and the required precision of relief angles equidimension, the cutter that connects that separately grinding then there will be in rear corner surface pauses, cutting edge defect is caused to cause spline to be pulled or rotten tooth, on the other hand, if when the large path process of part spline needs to adjust, need to carry out the synchronous reconditioning transformation of the way to all cutters tooth of broaching tool, otherwise the cutter that connects existed equally in cutter tooth rear corner surface pauses.
Summary of the invention
Technical problem to be solved by this invention is the involute spline broach proposing the combination tooth type structures that a kind of cutter tooth design arrangement adopts spiral to be combined with circular phase, in the course of work, cutting force is steady, and lathe vibrations are little, draw rear part deformation little, spline precision is high, and cutter manufacture manufacturability is strong.
For solving the problems of the technologies described above, a kind of its teeth portion of involute spline broach of the present invention comprises helical tooth type cutter tooth section and annular flute profile cutter tooth section, and described helical tooth type cutter tooth section is located at the leading portion of described teeth portion, is rough cut tooth; Described annular flute profile cutter tooth section is located at the back segment of described teeth portion, is smart cutting teeth and finishing teeth; The connecting portion of described two sections of cutter tooth sections disconnects with support slot form.
Above-mentioned a kind of involute spline broach, helical angle and the cutting edge inclination of described helical tooth type cutter tooth section cutter tooth are 0 ° ~ 20 °, and spiral the end of a thread number is 2 ~ 8.
Above-mentioned a kind of involute spline broach, the relief angle of all cutters tooth of described helical tooth type cutter tooth section is all identical, is 2 ° 30 '; Land is all identical, is 0 ~ 0.05.
Above-mentioned a kind of involute spline broach, the relief angle of described annular flute profile cutter tooth section cutter tooth and land are independent separately, and wherein finishing teeth relief angle is 30 ', and finishing tooth relief angle is 1 ° 30 ', and finishing teeth land is 0.2 ~ 0.8, and finishing tooth land is 0.1 ~ 0.2.
The present invention is owing to have employed above-mentioned technical pattern, helical tooth type rough lumber section stable cutting, annular flute profile section cutting output little (finishing teeth is without cutting output), do not circulate in whole broaching process covibration, the little precision of part broaching distortion is high, machined surface roughness can reach Ra0.8, meets the required precision of part spline, and cutter manufacture and wire pulling method manufacturability strong.Compared with existing full spiral broach, manufacturing cost is consistent, but cutter anufacturability is stronger, meet part to be processed process change adjustment realization very convenient, and broaching tool durability is higher, lathe damage is little, and superiority of effectiveness is obvious, be specially adapted to the wire pulling method of high accuracy internal spline especially short, the thin wall component of spline effective length, as gear sleeve of automobile synchronizer, ring gear etc.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing annular flute profile involute spline broach;
Fig. 2 is the structural representation of existing full helical tooth type involute spline broach;
Fig. 3 is the structural representation of involute spline broach of the present invention;
Fig. 4 is the cross-sectional view of helical tooth type cutter tooth in Fig. 3;
Fig. 5 is the cross-sectional view of annular flute profile cutter tooth in Fig. 3.
Detailed description of the invention
As shown in Figure 3, involute spline broach of the present invention comprise pull end 1, transition cone 2, leading 3, teeth portion 4, after lead 5 and rear handle 6, wherein teeth portion 4 comprises helical tooth type cutter tooth section 41 and annular flute profile cutter tooth section 42, forms the combination tooth type structures that spiral is combined with circular phase.Helical tooth type cutter tooth section 41 is arranged in the leading portion of teeth portion 4, for rough cut tooth, it is the formation cutter tooth of the effective profile of tooth of part involute, bear the cutting output of the overwhelming majority and the formation of spline involute active flank, its helical angle A and cutting edge inclination control between 0 ° ~ 20 °, spiral the end of a thread is several to be required to select to determine between 2 ~ 8 according to broaching tool diameter reality and helical angle, measures, usually select even number head number for ease of diameter dimension.The relief angle B1(2 of all cutters tooth ° 30 ') and land L(0 ~ 0.05) be consistent (shown in Fig. 4).Annular flute profile cutter tooth section 42 is arranged in the back segment of teeth portion 4, for smart cutting teeth and finishing teeth, bear micro cutting and the formation of large path size, the relief angle of cutter tooth and land be independent (shown in Fig. 5) separately, wherein finishing teeth relief angle B2(30 '), finishing tooth relief angle B3(1 ° 30 '), finishing teeth land L2(0.2 ~ 0.8 increases progressively), finishing tooth land L1(0.1 ~ 0.2), it is convenient to realize according to design requirement.The connecting portion of two sections of cutter tooth sections 41,42 disconnects with support slot form, and this support slot is one of auxiliary positioning in broaching tool processing, is also the chip pocket of the first cutter tooth of annular flute profile.
Broaching tool occupation mode of the present invention and lathe are selected and are as good as with common broaching tool, the change risen by diametric(al) tooth forms involute spline profile of tooth, is introduced by workpiece 7, be introduced into helical tooth type rough lumber section during broaching by guiding, enter annular flute profile essence again to cut and calibration segment, finally along rear derivation cutter.Handle 6 after broaching machine clamping during work, by the displacement of workbench or broaching tool, workpiece 7 enters leading 3 through after pull end 1, transition cone 2 successively, workpiece 7 and broaching tool is made to keep coaxial, then broaching machine clamping pull end 1 and execute with pulling force, broaching tool teeth portion 4, after lead 5, clamp in rear handle 6(process and unclamp) completed by workpiece 7 successively and once broach, handle 6 unclamp pull end 1 and can carry out circulation and broach after clamping again after withdrawing.Because teeth portion 4 have employed helical tooth type and annular flute profile fabricated structure, during broaching tool work, continuous cutting is steady, lathe is without circulation covibration, between part and broaching tool, circumferential displacement is little, profile accuracy is with equaling the accuracy of manufacture of broaching tool own, processing toothed surfaces roughness can reach Ra0.8, and after part broaching, deformation amount controlling is within diametric 0.03%, far below 0.05% of common annular tooth broaching tool.The maximum manufacture diameter of broaching tool of the present invention can reach φ 200mm.
Two sections of flute profiles of involute spline broach of the present invention are non-interference, respective design size, front-and-back angle angle and tolerance thereof can be realized arbitrarily, especially annular flute profile section finishing teeth, finishing tooth diameter dimension can be actual according to Broaching Technology, carry out transformation of the way reconditioning very easily.
Claims (1)
1. an involute spline broach, is characterized in that, its teeth portion comprises helical tooth type cutter tooth section and annular flute profile cutter tooth section, and described helical tooth type cutter tooth section is located at the leading portion of described teeth portion, is rough cut tooth; Described annular flute profile cutter tooth section is located at the back segment of described teeth portion, is smart cutting teeth and finishing teeth; The connecting portion of described two sections of cutter tooth sections disconnects with support slot form; The tooth helical angle of described helical tooth type cutter tooth section and cutting edge inclination are 0 ° ~ 20 °, and spiral the end of a thread number is 2 ~ 8; The relief angle of all cutters tooth of described helical tooth type cutter tooth section is all identical, is 2 ° 30 '; Land is all identical, is 0 ~ 0.05; The relief angle of described annular flute profile cutter tooth section cutter tooth and land are independent separately, and wherein finishing teeth relief angle is 30 ', and finishing tooth relief angle is 1 ° 30 ', and finishing teeth land is 0.2 ~ 0.8, and finishing tooth land is 0.1 ~ 0.2.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310509121.4A CN103537751B (en) | 2013-10-25 | 2013-10-25 | A kind of involute spline broach |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310509121.4A CN103537751B (en) | 2013-10-25 | 2013-10-25 | A kind of involute spline broach |
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| CN103537751A CN103537751A (en) | 2014-01-29 |
| CN103537751B true CN103537751B (en) | 2016-01-06 |
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| CN201310509121.4A Active CN103537751B (en) | 2013-10-25 | 2013-10-25 | A kind of involute spline broach |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU217659U1 (en) * | 2022-12-29 | 2023-04-11 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Чувашский государственный университет имени И. Н. Ульянова" | Slotted two-stage broach |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108971622A (en) * | 2018-06-29 | 2018-12-11 | 德阳杰创科技有限公司 | Equipment for the processing of compressor tenon |
| DE102019200022A1 (en) * | 2019-01-03 | 2020-07-09 | Forst Technologie Gmbh & Co. Kg | Internal swirl broaching tool |
| CN111633283B (en) * | 2020-04-23 | 2022-03-25 | 西安法士特汽车传动有限公司 | Coarse and fine drawing structure spline broach and design method thereof |
| CN114289798B (en) * | 2021-12-23 | 2023-05-09 | 陕西法士特齿轮有限责任公司 | Spiral broach with large helix angle and small diameter spline |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1724669A (en) * | 1927-08-16 | 1929-08-13 | Francis J Lapointe | Adjustable finishing end for broaches |
| US2255140A (en) * | 1940-05-31 | 1941-09-09 | Eaton Mfg Co | Burnishing tool |
| US2292900A (en) * | 1940-09-16 | 1942-08-11 | Chase Brass & Copper Co | Broach |
| US2436325A (en) * | 1943-11-27 | 1948-02-17 | Spirex Broach Corp | Broach |
| CN85201040U (en) * | 1985-04-01 | 1986-06-18 | 第二汽车制造厂 | Vertically pulled (or pushed) broach with spiral teeth |
| CN203817514U (en) * | 2013-10-25 | 2014-09-10 | 恒锋工具股份有限公司 | Involute spline broach |
-
2013
- 2013-10-25 CN CN201310509121.4A patent/CN103537751B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1724669A (en) * | 1927-08-16 | 1929-08-13 | Francis J Lapointe | Adjustable finishing end for broaches |
| US2255140A (en) * | 1940-05-31 | 1941-09-09 | Eaton Mfg Co | Burnishing tool |
| US2292900A (en) * | 1940-09-16 | 1942-08-11 | Chase Brass & Copper Co | Broach |
| US2436325A (en) * | 1943-11-27 | 1948-02-17 | Spirex Broach Corp | Broach |
| CN85201040U (en) * | 1985-04-01 | 1986-06-18 | 第二汽车制造厂 | Vertically pulled (or pushed) broach with spiral teeth |
| CN203817514U (en) * | 2013-10-25 | 2014-09-10 | 恒锋工具股份有限公司 | Involute spline broach |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU217659U1 (en) * | 2022-12-29 | 2023-04-11 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Чувашский государственный университет имени И. Н. Ульянова" | Slotted two-stage broach |
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| Publication number | Publication date |
|---|---|
| CN103537751A (en) | 2014-01-29 |
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