CN103170888A - Flexible shaft grinding head system of large-lead ball nut grinding and grinding method for machining nut - Google Patents
Flexible shaft grinding head system of large-lead ball nut grinding and grinding method for machining nut Download PDFInfo
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- CN103170888A CN103170888A CN2013101069211A CN201310106921A CN103170888A CN 103170888 A CN103170888 A CN 103170888A CN 2013101069211 A CN2013101069211 A CN 2013101069211A CN 201310106921 A CN201310106921 A CN 201310106921A CN 103170888 A CN103170888 A CN 103170888A
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Abstract
The invention discloses a flexible shaft grinding head system of large-lead ball nut grinding, and further discloses a grinding method for machining a nut. According to the flexible shaft grinding head system of large-lead ball nut grinding, a power output end of a mechanical flexible shaft is connected and assembled with a front end small shaft through a flexible shaft connector, a driven end of the mechanical flexible shaft is coaxially and fixedly connected with a motorized shaft connection shaft head, an axis of rotation of a grinding wheel is coaxially arranged with the front end small shaft, the grinding wheel is fixed on the front end small shaft of the grinding wheel through a compression screw of the grinding wheel, and a connection angle alpha of the axis of rotation of the grinding wheel and an axis of the mechanical flexible shaft is in accordance with an angle of a thread lead angle of the nut to be grinded for grinding and machining the nut to be grinded. The flexible shaft grinding head system is constructed due to the adoption of a combined shaft with shaft end couple vector directions randomly adjustable, so that the connection angle of the axis of rotation of the grinding wheel and a grinding rod axis accords with different lead angles, and interference of a grinding wheel grinding rod and a nut inner ring is avoided. The flexible shaft grinding head system of large-lead ball nut grinding and the grinding method for machining the nut are applicable to long-distance grinding and machining of large-lead nut inner rolling passages.
Description
Technical field
The present invention relates to a kind of grinding technique and equipment of workpiece, particularly a kind of device of grinding of nut and method for grinding, especially a kind of grinding technique of large lead ball nuts and equipment.
Background technology
Ball wire bar pair has that transmission efficiency is high, location and the characteristics such as repetitive positioning accuracy is high, long service life, low friction coefficient, although the linear motor feed drive system occurred, the high speed ball screw pair of nut is still mechanically operated common components at present.More than the surface quality requirement of general ball screw assembly, raceway reached Ra0.8, last one technique of ball nut processing was all generally to adopt grinding forming processing, and final precision and the surface quality of therefore interior raceway are guaranteed by grinding process.The spiral rolling track normal direction of the ball screw assembly, that most of feed systems are used is cut shape and is adopted Gothic section shape, is comprised of the circular arc of two sections symmetries.
Traditional form grinding processing, the cross section of emery wheel is processed to Gothic arc, and the emery wheel axis of rotation becomes lead angle to install with respect to the nut central axis, and workpiece is formed grinding.When the helical pitch of nut increased, lead angle increased, and it is large that the angle between emery wheel axis of rotation and nut central axis becomes, and in grinding-wheel grinder bar and nut, roller surface interferes, and makes emery wheel can not cross this position and carries out grinding.Process technology relatively more commonly used is when changing the emery wheel established angle at present, changes the shape of cutting of emery wheel, and large helical pitch long nut is carried out grinding.Adopt this method for grinding, but increased to a certain extent the scope of grinding lead angle, but can not fundamentally solve the grinding interference problem of large helical pitch long nut raceway, and if the grinding wheel spindle setting angle is too little, easily formed between emery wheel and screw thread roller surface and cut, making ball nut raceway after grinding cut shape is not exclusively Gothic arc.Therefore, need a kind of can the assurance of design enough to grind bar rigidity, and realize method for grinding and the device of any helical pitch and length ball nut raceway, but the grinding technique of the large lead ball nuts of using at present and equipment are desirable not enough.
Summary of the invention
In order to solve the prior art problem, the object of the invention is to overcome the deficiency that prior art exists, a kind of flexible axle grinding head system of large pitch ball screw nut is provided, eliminate the phenomenon that traditional large pitch ball screw nut medium sand disc sharpener bar and ball nut inner ring interfere, and make the flexible axle grinding head system keep enough mill bar rigidity, realize based on the grinding technique of flexible axle grinding head system to any helical pitch and length ball nut raceway.
Create purpose for reaching foregoing invention, the present invention conceives as follows:
Adopt a kind of flexible axle grinding head system, utilize flexible axle can change arbitrarily the characteristics that the axle head couple is vowed direction, realize that the emery wheel axis of rotation is connected with nut lead angle angle with grinding between rod axis.When using this grinding head system to ball nut grinding, mill rod axis and nut shaft line parallel have avoided grinding-wheel grinder bar and ball nut inner ring to interfere, thereby have realized large helical pitch, long apart from the grinding of rolling in ball nut.
According to the foregoing invention design, adopt following technical proposals:
a kind of flexible axle grinding head system of large pitch ball screw nut, mainly comprise mechanical flexible axle, the little axle of front end, flexible shaft end, back-up block and mill rod sleeve, clutch end and the little axle of front end of machinery flexible axle assemble by flexible shaft end, the end that is transmitted of machinery flexible axle is connected with electric main shaft that spindle nose is coaxial to be fixedly connected with, the little axle of front end is to be rotationally connected in the nested endoporus that is arranged on back-up block of mode activity, the mode activity is nested to be arranged in mill rod sleeve inner chamber the machinery flexible axle to be rotationally connected, connecting back-up block is fastenedly connected with nested mill rod sleeve, by mounting flange, nested mill rod sleeve is fixed on the abrasive grinding wheel frame, the axis coaxle setting of the axis of rotation of nut rolling way abrasive grinding wheel and the little axle of front end, by the emery wheel housing screw, the nut rolling way abrasive grinding wheel is fixed on the little axle of emery wheel front end, the angle of the axis of rotation of nut rolling way abrasive grinding wheel and the joint angle α of the axis of mechanical flexible axle is consistent with the angle of the thread lead angle of nut to be ground, the power that the electricity main shaft connects spindle nose output is delivered to the little axle of front end by mechanical flexible axle successively, and then be delivered on the nut rolling way abrasive grinding wheel, after nut axis to be ground and mechanical flexible axle axis being be arranged in parallel install, nut to be ground is carried out grinding.
The little axle of above-mentioned front end is preferably by movable nested being arranged in the back-up block endoporus of bearing, and mechanical flexible axle preferably is arranged in mill rod sleeve inner chamber by bearing is movable nested, forms respectively and is rotationally connected pair.
Adopt the method for grinding of grinding attachment nut processing of the flexible axle grinding head system of above-mentioned large pitch ball screw nut, be specially:
A. adopt to change arbitrarily the built-up shaft structure flexible axle grinding head system that the axle head couple is vowed direction, at axle head, front end emery wheel parts are installed, and are cut type according to the standard nut raceway type that cuts of front end emery wheel parts is repaired;
B. according to the size of nut helical pitch to be ground, make the connection angle of the mill rod axis of emery wheel axis of rotation and flexible axle grinding head system meet the lead angle of ball nut, the mill bar is directly accepted the external force transmission;
C. grinding carriage drives the flexible axle grinding head system and does Z-motion, and nut to be ground is clamped on headstock chuck, does the C axle by headstock chuck drive nut to be ground and rotatablely moves;
D. by the Z-axis direction feeding of flexible axle grinding head system and the rotating interlock campaign of C axle of nut to be ground, nut rolling way to be ground is carried out form grinding processing, has following relation between the C axle gyration of the Z-axis direction feeding of flexible axle grinding head system and nut to be ground:
Wherein z is the Z-axis direction feeding displacement of flexible axle grinding head system, and c is the anglec of rotation of the C axle gyration of nut to be ground, and s is the helical pitch of nut to be ground.
The present invention has following apparent outstanding substantive distinguishing features and remarkable advantage compared with prior art:
1. when using soft grinding head of the present invention system to large pitch ball screw nut, the machinery flexible axle has advantages of Universal drive, can realize grinding rod axis and nut shaft line parallel during grinding, avoided grinding medium sand disc sharpener bar and ball nut inner ring to interfere, thereby the length that can realize large lead ball nuts is apart from grinding;
2. when using soft grinding head of the present invention system to large pitch ball screw nut, emery wheel only needs the nut rolling way according to standard cut type to repair, and it is high that emery wheel is repaiied type efficient, is easy to realize;
3. when using soft grinding head of the present invention system to large pitch ball screw nut, during the ball nut raceway of grinding different lead, only need to change the front end emery wheel parts of different model, make the emery wheel axis of rotation meet different lead angle angles from mill rod axis connection angle, adapt to the variation of lead angle, so the present invention is applicable to the length of raceway in various large helical pitch nuts apart from grinding.
4. system architecture of the present invention is simple, compact, and drive efficiency is high, and grinding technique is simple.
Description of drawings
Fig. 1 is the structural representation of the flexible axle grinding head system of the embodiment of the present invention one large pitch ball screw nut.
Fig. 2 is the coordinate system that the grinding attachment of the flexible axle grinding head system of the employing embodiment of the present invention one carries out grinding to nut workpiece to be ground.
The specific embodiment
Details are as follows for the preferred embodiments of the present invention:
Embodiment one:
in the present embodiment, referring to Fig. 1 and Fig. 2, a kind of flexible axle grinding head system of large pitch ball screw nut, mainly comprise mechanical flexible axle 3, the little axle 8 of front end, flexible shaft end 4, back-up block 10 and mill rod sleeve 2, clutch end and the little axle 8 of front end of machinery flexible axle 3 assemble by flexible shaft end 4, the end that is transmitted of machinery flexible axle 3 is connected with electric main shaft that spindle nose 1 is coaxial to be fixedly connected with, the little axle 8 of front end is to be rotationally connected in the nested endoporus that is arranged on back-up block 10 of mode activity, the mode activity is nested to be arranged in mill rod sleeve 2 inner chambers machinery flexible axle 3 to be rotationally connected, connecting back-up block 10 is fastenedly connected with nested mill rod sleeve 2, by mounting flange 9, nested mill rod sleeve 2 is fixed on the abrasive grinding wheel frame, provide support as mechanical flexible axle, the axis coaxle setting of the little axle 8 of the axis of rotation of nut rolling way abrasive grinding wheel 7 and front end, by emery wheel housing screw 6, nut rolling way abrasive grinding wheel 7 is fixed on the little axle 8 of emery wheel front end, the angle of the axis of rotation of nut rolling way abrasive grinding wheel 7 and the joint angle α of the axis of mechanical flexible axle 3 is consistent with the angle of the thread lead angle of nut 5 to be ground, the power that the electricity main shaft connects spindle nose 1 output is delivered to the little axle 8 of front end by mechanical flexible axle 3 successively, and then be delivered on nut rolling way abrasive grinding wheel 7, after nut 5 axis to be ground and mechanical flexible axle 3 axis being be arranged in parallel install, nut 5 to be ground is carried out grinding.During the ball nut raceway of grinding different lead, only need to change front end nut ball race grinding emery wheel 7 parts of different model.The little axle 8 of front end is connected to form built-up shaft by the end of flexible shaft end 4 and mechanical flexible axle 3, power is delivered on nut rolling way abrasive grinding wheel 7 by the flexible axle system, because mechanical flexible axle has advantages of Universal drive, can realize during grinding that mechanical flexible axle 3 is parallel with the axis of nut 5 to be ground as the axis of mill bar, avoided grinding medium sand disc sharpener bar and ball nut inner ring to interfere, thereby the length that can realize large lead ball nuts is apart from the grinding nut.Ball race grinding emery wheel 7 is fixedly mounted on the little axle 8 of front end, thereby realize being connected with the lead angle angle between nut rolling way abrasive grinding wheel 7 axiss of rotation and mechanical flexible axle 3, with this variation that adapts to lead angle, be particularly useful for the length of raceway in various large helical pitch nuts apart from grinding.
In the present embodiment, the method for grinding of the grinding attachment nut processing of the flexible axle grinding head system of the above-mentioned large pitch ball screw nut of employing is specially:
A. adopt to change arbitrarily the built-up shaft structure flexible axle grinding head system that the axle head couple is vowed direction, at axle head, front end emery wheel parts are installed, and are cut type according to the standard nut raceway type that cuts of front end emery wheel parts is repaired;
B. according to the size of nut helical pitch to be ground, make the connection angle of the mill rod axis of emery wheel axis of rotation and flexible axle grinding head system meet the lead angle of ball nut, the mill bar is directly accepted the external force transmission;
C. grinding carriage drives the flexible axle grinding head system and does Z-motion, and nut to be ground is clamped on headstock chuck, does the C axle by headstock chuck drive nut to be ground and rotatablely moves;
D. by the Z-axis direction feeding of flexible axle grinding head system and the rotating interlock campaign of C axle of nut to be ground, nut rolling way to be ground is carried out form grinding processing, has following relation between the C axle gyration of the Z-axis direction feeding of flexible axle grinding head system and nut to be ground:
Wherein z is the Z-axis direction feeding displacement of flexible axle grinding head system, and c is the anglec of rotation of the C axle gyration of nut to be ground, and s is the helical pitch of nut to be ground.
The method for grinding of the present embodiment nut processing adopts a kind of grinding system of flexible axle, utilizes flexible axle to change arbitrarily the characteristic that the axle head couple is vowed direction, realizes that the emery wheel axis of rotation is connected with the lead angle angle with the mill rod axis.When using this grinding head system to the nut grinding, mill rod axis and nut shaft line parallel, avoided grinding medium sand disc sharpener bar and ball nut inner ring to interfere, thereby realized large helical pitch, long apart from the grinding of rolling in ball nut.During the ball nut raceway of grinding different lead, only need to change the front end emery wheel parts of different model, make the emery wheel axis of rotation and grind the rod axis connection angle and meet different lead angle angles.When employing is carried out grinding based on the flexible axle grinding head system to large lead ball nuts, emery wheel only needs to cut type according to the standard nut raceway and repairs, by the Z-axis direction feeding of flexible axle grinding head system and the rotating interlock campaign of workpiece C axle, the large lead ball nuts raceway is carried out form grinding processing.
Embodiment two:
The present embodiment and embodiment one are basic identical, and special feature is:
In the present embodiment, the little axle 8 of front end is by movable nested being arranged in back-up block 10 endoporus of bearing, machinery flexible axle 3 is arranged in mill rod sleeve 2 inner chambers by bearing is movable nested, form respectively and be rotationally connected pair, when making each parts of rotation produce relative motion each other, the coefficient of friction and the retainer shaft center that reduce in power transmission process are fixed, and improve job stability and device service life of the present embodiment flexible axle grinding head system.
The above is illustrated the embodiment of the present invention by reference to the accompanying drawings; but the invention is not restricted to above-described embodiment; can also make multiple variation according to the purpose of innovation and creation of the present invention; all according to technical solution of the present invention Spirit Essence and principle under make change, modification, substitute, combination, simplify; all should be the substitute mode of equivalence; as long as goal of the invention according to the invention; only otherwise deviate from know-why and the inventive concept of the method for grinding of the flexible axle grinding head system of large pitch ball screw nut of the present invention and nut processing, all belong to protection scope of the present invention.
Claims (3)
1. the flexible axle grinding head system of a large pitch ball screw nut, it is characterized in that: mainly comprise mechanical flexible axle (3), the little axle of front end (8), flexible shaft end (4), back-up block (10) and mill rod sleeve (2), the clutch end of described mechanical flexible axle (3) and the little axle of described front end (8) assemble by described flexible shaft end (4), the end that is transmitted of described mechanical flexible axle (3) is connected coaxial being fixedly connected with of spindle nose (1) with electric main shaft, the little axle of described front end (8) is to be rotationally connected in the nested endoporus that is arranged on back-up block (10) of mode activity, the mode activity is nested to be arranged in mill rod sleeve (2) inner chamber described mechanical flexible axle (3) to be rotationally connected, described connection back-up block (10) is fastenedly connected with described nested mill rod sleeve (2), by mounting flange (9), described nested mill rod sleeve (2) is fixed on the abrasive grinding wheel frame, the axis coaxle setting of the axis of rotation of nut rolling way abrasive grinding wheel (7) and the little axle of described front end (8), by emery wheel housing screw (6), described nut rolling way abrasive grinding wheel (7) is fixed on the little axle of emery wheel front end (8), the angle of the axis of rotation of described nut rolling way abrasive grinding wheel (7) and the joint angle α of the axis of described mechanical flexible axle (3) is consistent with the angle of the thread lead angle of nut to be ground (5), the power that the electricity main shaft connects spindle nose (1) output is delivered to the little axle of described front end (8) by described mechanical flexible axle (3) successively, and then be delivered on described nut rolling way abrasive grinding wheel (7), after nut to be ground (5) axis and described mechanical flexible axle (3) axis being be arranged in parallel install, nut to be ground (5) is carried out grinding.
2. the flexible axle grinding head system of large pitch ball screw nut according to claim 1, it is characterized in that: the little axle of described front end (8) is by movable nested being arranged in back-up block (10) endoporus of bearing, described mechanical flexible axle (3) is arranged in mill rod sleeve (2) inner chamber by bearing is movable nested, forms respectively and is rotationally connected pair.
3. the method for grinding of the grinding attachment nut processing of a flexible axle grinding head system that adopts claim 1 or 2 described large pitch ball screw nut is characterized in that:
A. adopt to change arbitrarily the built-up shaft structure flexible axle grinding head system that the axle head couple is vowed direction, at axle head, front end emery wheel parts are installed, and are cut type according to the standard nut raceway type that cuts of front end emery wheel parts is repaired;
B. according to the size of nut helical pitch to be ground, make the connection angle of the mill rod axis of emery wheel axis of rotation and flexible axle grinding head system meet the lead angle of ball nut, the mill bar is directly accepted the external force transmission;
C. grinding carriage drives the flexible axle grinding head system and does Z-motion, and nut to be ground is clamped on headstock chuck, does the C axle by headstock chuck drive nut to be ground and rotatablely moves;
D. by the Z-axis direction feeding of flexible axle grinding head system and the rotating interlock campaign of C axle of nut to be ground, nut rolling way to be ground is carried out form grinding processing, has following relation between the C axle gyration of the Z-axis direction feeding of flexible axle grinding head system and nut to be ground:
Wherein z is the Z-axis direction feeding displacement of flexible axle grinding head system, and c is the anglec of rotation of the C axle gyration of nut to be ground, and s is the helical pitch of nut to be ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101069211A CN103170888A (en) | 2013-03-29 | 2013-03-29 | Flexible shaft grinding head system of large-lead ball nut grinding and grinding method for machining nut |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101069211A CN103170888A (en) | 2013-03-29 | 2013-03-29 | Flexible shaft grinding head system of large-lead ball nut grinding and grinding method for machining nut |
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| CN103170888A true CN103170888A (en) | 2013-06-26 |
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| CN2013101069211A Pending CN103170888A (en) | 2013-03-29 | 2013-03-29 | Flexible shaft grinding head system of large-lead ball nut grinding and grinding method for machining nut |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104070449A (en) * | 2014-06-24 | 2014-10-01 | 舒能（苏州）工业技术有限公司 | Curved grinding head driven through flexible shaft |
| TWI548475B (en) * | 2013-12-18 | 2016-09-11 | 全球傳動科技股份有限公司 | Method for working nuts |
| CN104723187B (en) * | 2013-12-18 | 2018-07-06 | 全球传动科技股份有限公司 | The processing method of nut |
| CN108500755A (en) * | 2018-06-11 | 2018-09-07 | 济宁市微科特机械制造有限责任公司 | A kind of tooling, processing method for processing the nut of ball-screw |
| CN110103104A (en) * | 2019-05-17 | 2019-08-09 | 辽宁科技大学 | A kind of device and method polishing 45 ° of parting O shape die for rubber seal rings |
| CN113441911A (en) * | 2021-06-23 | 2021-09-28 | 陕西万方汽车零部件有限公司 | Integrated machining method for internal circulation steering nut |
| CN115647827A (en) * | 2022-12-22 | 2023-01-31 | 山东台稳精密机械有限公司 | Ball nut machining device and machining method |
| CN116060708A (en) * | 2023-03-22 | 2023-05-05 | 苏州玖钧智能装备有限公司 | High-precision ball nut thread groove grinding mechanism |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI548475B (en) * | 2013-12-18 | 2016-09-11 | 全球傳動科技股份有限公司 | Method for working nuts |
| CN104723187B (en) * | 2013-12-18 | 2018-07-06 | 全球传动科技股份有限公司 | The processing method of nut |
| CN104070449A (en) * | 2014-06-24 | 2014-10-01 | 舒能（苏州）工业技术有限公司 | Curved grinding head driven through flexible shaft |
| CN104070449B (en) * | 2014-06-24 | 2016-10-05 | 舒能（苏州）工业技术有限公司 | The bending bistrique of driven by quill shaft |
| CN108500755A (en) * | 2018-06-11 | 2018-09-07 | 济宁市微科特机械制造有限责任公司 | A kind of tooling, processing method for processing the nut of ball-screw |
| CN110103104A (en) * | 2019-05-17 | 2019-08-09 | 辽宁科技大学 | A kind of device and method polishing 45 ° of parting O shape die for rubber seal rings |
| CN110103104B (en) * | 2019-05-17 | 2024-03-26 | 辽宁科技大学 | Device and method for polishing 45-degree parting O-shaped rubber sealing ring mold |
| CN113441911A (en) * | 2021-06-23 | 2021-09-28 | 陕西万方汽车零部件有限公司 | Integrated machining method for internal circulation steering nut |
| CN115647827A (en) * | 2022-12-22 | 2023-01-31 | 山东台稳精密机械有限公司 | Ball nut machining device and machining method |
| CN116060708A (en) * | 2023-03-22 | 2023-05-05 | 苏州玖钧智能装备有限公司 | High-precision ball nut thread groove grinding mechanism |
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Application publication date: 20130626 |