CN102278440B - Ball screw cap with deep groove track and manufacturing method thereof - Google Patents
Ball screw cap with deep groove track and manufacturing method thereof Download PDFInfo
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- CN102278440B CN102278440B CN201010194865.8A CN201010194865A CN102278440B CN 102278440 B CN102278440 B CN 102278440B CN 201010194865 A CN201010194865 A CN 201010194865A CN 102278440 B CN102278440 B CN 102278440B
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- ball
- deep groove
- groove track
- spiral
- track
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Abstract
The invention discloses a ball screw cap with a deep groove track and a manufacturing method thereof. After the ball screw cap is separated from a ball lead screw, balls on the inner circle surface of the ball screw cap is still limited in the deep groove track and are prevented from being scattered, so that the ball screw cap is convenient to be screwed out of and into the ball lead screw. The manufacturing method of the ball screw cap comprises the following steps of: drilling a hole on a blank with the conventional technology to form an inner circle surface; processing the inner circle surface with a turning method or a whirling method to form a spiral groove of which the depth is greater than the ball radius, the opening is a little smaller than the ball diameter, the normal section bottom side is a circular arc and the upper part is rectangular; introducing a spiral cutting tool into the spiral groove for cutting to form a deep groove track; and performing thermal treatment and surface treatment on the deep groove track.
Description
Technical field
The present invention relates to a kind of ball nut and manufacture method thereof with deep groove track, after ball nut back-out disengaging ball screw, the ball of its inner headed face is still limited in can not being scattered in deep groove track, facilitates ball nut to screw out and screws in ball screw.
Background technique
Ball screw pair is rotatablely moving of ball screw or ball nut to be converted into the mechanical component of the axial linear movement of ball nut or ball screw, is included in the ball screw that has spiral rolling track on periphery, ball nut and a plurality of ball that can roll in ball rolling rail inner loop that has spiral ball orbit at inner headed face.
In existing application, no matter the ball rolling rail of ball screw periphery and the ball rolling rail of ball nut inner headed face, when ball is identical with it, be be all less than half sphere part in rolling rail, therefore ball screw and ball nut be unkitted be fitted on together with time, ball cannot be limited in the track of ball nut or ball screw.After assembling, ball is limited in along ball rolling rail and circulation canal, rolling between the ball rolling rail of ball nut and ball screw.In the general application of ball screw, ball nut is in ball screw surface to-and-fro motion, under normal operation, ball nut does not need to depart from ball screw, just when assembling and maintenance, just need to depart from, once ball nut departs from ball screw, ball will be scattered, and brings very big inconvenience to assembling and maintenance.In addition, in some special applications, ball nut needs often to screw out disengaging ball screw, screws in and is assembled on ball screw, and existing ball nut is when departing from ball screw, and ball just drops from track, therefore cannot be competent at this working condition.If the ball rolling rail of ball nut is deep groove track, be that the track degree of depth is greater than ball radius, and track opening is less than ball diameter, ball just can directly not drop out from the inner headed face of ball nut in the deep groove track of ball nut so, just can realize convenient for assembly, maintenance and the above-mentioned particular application of ball nut and ball screw.
The ball rolling rail of existing ball nut and ball screw, track is more shallow, track opening width is greater than track bottom width, therefore can adopt cutting and grinding, relatively easily manufactures.If ball rolling rail is deep groove track, the track degree of depth is greater than ball radius, and track opening is less than ball diameter, and so common cutting and abrasive machining tool are all by helpless.
Summary of the invention
The object of the present invention is to provide a kind of can addressing the above problem, be that ball nut inner headed face has deep groove track, after ball nut departs from ball screw, the ball nut that ball can not be scattered and drop out from the deep groove track of ball nut, and the method for simply and easily manufacturing this ball nut.
In order to reach this target, technological scheme of the present invention is such: a kind of ball nut with deep groove track, the helical ball rolling rail of its inner headed face is deep groove track 4, and the degree of depth of deep groove track 4 is greater than the radius of ball 3, but track opening is less than the diameter of ball 3.The deep groove track 4 of this structure, ball 3 enters wherein, and more than half sphere is portion in orbit, and a smaller part sphere exposes by track opening.When ball nut 2 screws in ball screw 1, the most of sphere of ball 3 coincide in the deep groove track 4 of ball nut 2, and fraction sphere coincide in ball screw track 5.Ball nut inner headed face 2a does not contact with ball screw periphery 1a.
Described a kind of ball nut with deep groove track, its ball 3 packs into or packs into from circulation pilot hole from deep groove track 4 entries at ball nut 2 two ends, ball 3 can not directly pack deep groove track 4 into from ball nut inner headed face, can not from the deep groove track 4 of inner headed face, drop out.The endless form of ball 3 can adopt interior circulation, outer circulation or end cap endless form.
According to a kind of ball nut with deep groove track of the present invention, a kind of method of manufacturing this ball nut is provided, after conventional art forms inner headed face by blank boring, adopt the method processing inner headed face of method for turning or whirling mill, manufacture the degree of depth and be greater than that ball radius, opening are slightly less than ball diameter, base, Normal section is that circular arc top is the helical groove of rectangle, then adopt spiral cutting instrument to import helical groove and cut formation deep groove track, afterwards deep groove track is heat-treated and surface treatment.
In described processing method, because processed opening with inner same width but the helical groove that the darker base of the degree of depth is arc with traditional cutting method, therefore adopt again with the spiral cutting instrument with deep groove track Normal section same cross-sectional, can cutting at one time be shaped, reduced difficulty of processing, cut down finished cost, its precision is also relatively high.Spiral cutting instrument adopts numerical control machine tool to control, and guarantees the accurate of data.
In described processing method, after spiral cutting tool processes, at the inner headed face of ball nut, form a track degree of depth and be greater than ball radius, track is young in the deep groove track of ball diameter, adopt prior heat treatment technology to carry out surface sclerosis, adopt afterwards electropolishing technology to improve surface flatness.
In described processing method, spiral cutting instrument 6 comprises guide-localization bar 6-1, spiral limiting wire 6-2, initial cutter tip 6-3, intermediate cut cutter head 6-4, form-cutting cutter head 6-5, helical blade 6-6, blade carrier 6-7, grip shank 6-8; Guide-localization bar 6-1 and ball nut inner headed face form sliding fit, and spiral limiting wire 6-2 fits like a glove with the helical groove being processed to form, to guarantee that cutter tip axially imports helical groove; Spiral limiting wire 6-2, helical blade 6-6 and blade carrier 6-7 are welding as one; The starting point of each helical blade 6-6 is processed into cutter tip, the cross section of initial cutter tip 6-3 is less than the Normal section of deep groove track, intermediate cut cutter head 6-4 can be a plurality of, its cross section increases gradually but is less than the Normal section of deep groove track, and form-cutting cutter head 6-5 cross section is identical with the Normal section of deep groove track; The spiral angle of helical blade 6-6 is consistent with the spiral angle of deep groove track, to promote cutter tip, enters into deep groove track inside; Between each helical blade 6-6 and next cutter tip, leave space, to hold the iron filings under cutting; 6-6 is symmetrical around blade carrier 6-7 along helix for each helical blade.
The invention has the beneficial effects as follows: when ball nut departs from ball screw, ball can not drop out from being scattered in the deep groove track of ball nut, thereby can screw in easily and screw out, for I& M brings great convenience, also met some ball nuts occasion that needs detached and be fitted into ball screw in the course of the work simultaneously and used.
Accompanying drawing explanation
Fig. 1 is general principles structural drawing of the present invention, also can be used as Figure of abstract.
Fig. 2 is ball deep groove track of the present invention Normal section schematic diagram.
Fig. 3 is the structural drawing of spiral cutting instrument of the present invention.
Wherein:
1, ball screw
1a, ball screw periphery
1b, ball screw track bottom surface
2, ball nut
2a, ball nut inner headed face
2b, ball nut track bottom surface
3, ball
3a, ball center of circle face
4, deep groove track
5, ball screw track
6, spiral cutting instrument
6-1, guide-localization bar
6-2, spiral limiting wire
6-3, initial cutter tip
6-4, intermediate cut cutter head
6-5, form-cutting cutter head
6-6, helical blade
6-7, blade carrier
6-8, grip shank
Embodiment
Fig. 1 and Fig. 2 are principle assumption diagrams of the present invention.It is large that the radius of the deep groove track 4 depth ratio balls 3 on ball nut 2 inner headed faces is wanted, but track opening is less than the diameter of ball 3, so ball 3 is in deep groove track 4, most of in deep groove track 4 inside, fraction exposes track outside, and the spherical calotte exposing and ball screw track 5 coincide.Fig. 2 has shown the Normal section of this structure in detail, ball center of circle face 3a is to the distance (being the radius of ball 3) of ball nut track bottom surface 2b, be less than ball nut inner headed face 2a to the distance (being the ball nut track degree of depth) of ball nut track bottom surface 2b, ball 3 major parts are in deep groove track 4.Between ball screw periphery 1a and ball nut inner headed face 2a, there is gap, while being ball nut 2 screw-in ball screw 1, ball 3 is limited in, between deep groove track 4 and ball screw track 5, can rolling in orbit, but ball nut 2 does not contact with ball screw 1.
The step of manufacturing this ball nut is:
The first step, chooses or intercepts ball nut blank, adopts conventional method in blank centre-drilling hole, forms the inner headed face of ball nut, and the inside and outside disc of fine finishing;
Second step, adopts turning tools or whirling mill instrument to process helical groove at ball nut inner headed face, and the degree of depth of this helical groove is greater than ball radius, opening and is slightly less than ball diameter, Normal section to approach base be that circular arc top is rectangle;
The 3rd step, adopts as the spiral cutting instrument of Fig. 3 imports in the helical groove that second step produces, and groove is carried out to cross section and be shaped and process.This process adopts machine tooling, to guarantee the accuracy of data.Ball nut is fixed on to chuck hub, the grip shank 6-8 of spiral cutting instrument 6 is arranged on tool holder, make it concentric with ball nut workpiece.The Mobile data of knife rest and the helical pitch data of spiral are matched, with intact identical helical groove.First guide-localization bar 6-1 enters into ball nut inner circle, and spiral limiting wire 6-2 follows and enters, and by spiral cutting instrument 6 and the accurate concentric locating of ball nut.Along with spiral cutting instrument 6 advances, initial cutter tip 6-3, intermediate cut cutter head 6-4, form-cutting cutter head 6-5 be cutting flutes middle and lower part successively, the final deep groove track that forms the cross section that requires.
The 4th step, the deep groove track processing for the 3rd step, first adopts carburizing or quenching heat treatment technology, makes raceway surface have the hardness of requirement.Then adopt electropolishing process for treating surface, make raceway surface meet the requirements of smoothness, and increase work efficiency, improve operating accuracy and the working life of product.
Claims (1)
1. a manufacture method with the ball nut of deep groove track, it is characterized in that: after conventional art forms inner headed face by blank boring, adopt the method processing inner headed face of method for turning or whirling mill, manufacture the degree of depth and be greater than that ball radius, opening are slightly less than ball diameter, base, Normal section is that circular arc top is the helical groove of rectangle, then adopt spiral cutting instrument (6) to import helical groove and cut formation deep groove track, afterwards deep groove track is heat-treated and surface treatment; Spiral cutting instrument (6) comprising: guide-localization bar (6-1), spiral limiting wire (6-2), initial cutter tip (6-3), intermediate cut cutter head (6-4), form-cutting cutter head (6-5), helical blade (6-6), blade carrier (6-7), grip shank (6-8); Guide-localization bar (6-1) forms and is slidably matched with ball nut inner headed face, and spiral limiting wire (6-2) fits like a glove with the helical groove being processed to form, to guarantee that cutter tip axially imports helical groove; Spiral limiting wire (6-2), helical blade (6-6) are welding as one with blade carrier (6-7); The starting point of each helical blade (6-6) is processed into each cutter tip, the Normal section of initial cutter tip (6-3) is less than the Normal section of deep groove track, intermediate cut cutter head (6-4) is a plurality of, a plurality of intermediate cut cutter heads (6-4) increase gradually by its Normal section of order from front to back, and are all less than the Normal section of deep groove track; Form-cutting cutter head (6-5) Normal section is identical with the Normal section of deep groove track; The spiral angle of helical blade (6-6) is consistent with the spiral angle of deep groove track, to promote cutter tip, enters into deep groove track inside; Between each helical blade (6-6) and next cutter tip, leave space, to hold the iron filings under cutting; Each helical blade (6-6) along helix around blade carrier (6-7) symmetrical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010194865.8A CN102278440B (en) | 2010-06-08 | 2010-06-08 | Ball screw cap with deep groove track and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010194865.8A CN102278440B (en) | 2010-06-08 | 2010-06-08 | Ball screw cap with deep groove track and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102278440A CN102278440A (en) | 2011-12-14 |
| CN102278440B true CN102278440B (en) | 2014-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010194865.8A Expired - Fee Related CN102278440B (en) | 2010-06-08 | 2010-06-08 | Ball screw cap with deep groove track and manufacturing method thereof |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104690519B (en) * | 2013-12-10 | 2018-03-13 | 全球传动科技股份有限公司 | The manufacture method of screw rod |
| CN109803790A (en) * | 2016-10-18 | 2019-05-24 | 日本精工株式会社 | The manufacturing method of raceway groove processing method, bearing, ball-screw apparatus, machine and vehicle |
| CN106424985B (en) * | 2016-12-01 | 2019-03-15 | 广东工业大学 | A kind of machining tool and technique of the more roll ways and roll balls nut arc spiral grooves of large pitch |
| CN109396955B (en) * | 2017-08-16 | 2020-11-20 | 山东大学 | Cutting force prediction method and system for cyclone envelope milling process |
| CN107877095B (en) * | 2017-10-31 | 2020-04-10 | 宁波更大集团有限公司 | Machining process of ball screw nut |
| CN108620822A (en) * | 2018-04-28 | 2018-10-09 | 丹阳市宏光机械有限公司 | A kind of manufacturing process of powder high-precision measuring screw rod |
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| CN1280048A (en) * | 1999-07-08 | 2001-01-17 | 亚伊色尔株式会社 | Ball-screw and straight movement device use it |
| CN1607342A (en) * | 2003-10-14 | 2005-04-20 | 株式会社福贝斯 | Ball screw mechanism, machining method for joint between nut and ball circulation piece, and electric power steering device |
| CN1712755A (en) * | 2004-06-22 | 2005-12-28 | 日本精工株式会社 | Ball screw device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009103228A (en) * | 2007-10-24 | 2009-05-14 | Jtekt Corp | Ball screw with ball spline |
| JP2009250345A (en) * | 2008-04-04 | 2009-10-29 | Thk Co Ltd | Screw device, and method of manufacturing nut thereof |
| JP4829928B2 (en) * | 2008-06-24 | 2011-12-07 | 上銀科技股▲分▼有限公司 | Multiple circulation ball screw |
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2010
- 2010-06-08 CN CN201010194865.8A patent/CN102278440B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2307023A (en) * | 1995-11-10 | 1997-05-14 | Thomson Ibl Ltd | Re-circulating ballscrew and nut devive |
| CN1262729A (en) * | 1998-03-25 | 2000-08-09 | 蒂业技凯株式会社 | Ball screw device |
| CN1260259A (en) * | 1998-09-11 | 2000-07-19 | Thk株式会社 | Ball-screw nut and making method thereof, linear guiding device and ball-screw for turning |
| CN1280048A (en) * | 1999-07-08 | 2001-01-17 | 亚伊色尔株式会社 | Ball-screw and straight movement device use it |
| CN1607342A (en) * | 2003-10-14 | 2005-04-20 | 株式会社福贝斯 | Ball screw mechanism, machining method for joint between nut and ball circulation piece, and electric power steering device |
| CN1712755A (en) * | 2004-06-22 | 2005-12-28 | 日本精工株式会社 | Ball screw device |
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| CN102278440A (en) | 2011-12-14 |
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Granted publication date: 20140305 Termination date: 20160608 |