CN112935438A - Spline sleeve and machining method thereof, and micro ball spline assembly - Google Patents

Abstract

The invention belongs to the technical field of microelectronic processing, and discloses a spline sleeve, which comprises: the flower piece sleeve main body and the central hole; wherein, two ends of the flower sleeve main body are respectively fixed with a group of guide end covers and a group of turning end covers; two grooves are longitudinally formed in the inner side wall of the spline housing main body and serve as main ball slide ways; two ball return slideways are longitudinally arranged in the spline housing main body, each ball return slideway is arranged adjacent to the corresponding ball main slideway, and the transverse grooves of the ball return slideways are communicated with the central hole; the guide end cover is provided with a guide groove on one side of the main body of the flower sleeve, the guide groove is communicated with a group of adjacent ball main slide ways and ball return slide ways, the turning end cover is provided with a turning groove at a position corresponding to the guide groove, and the guide groove and the turning groove jointly form a channel for communicating the ball main slide ways and the ball return slide ways. The flower piece sleeve main body can be machined at one time by adopting slow-moving wire cutting, the machining difficulty is reduced, the machining precision is improved, and the machining cost is greatly reduced.

Description

Spline sleeve and machining method thereof, and micro ball spline assembly

Technical Field

The invention relates to the technical field of microelectronic processing, in particular to a spline sleeve, a spline sleeve processing method and a micro ball spline assembly.

Background

With the development of technology, electronic components such as chips tend to be miniaturized and mounted. The patch element has small volume and high density, and is difficult to manually finish in the production process of electronic products, and the production of the electronic products is mainly finished by a patch machine. The spline is a core component of electronic product production equipment such as a chip mounter and the like, at present, the processing of the spline is required to be finished through electric spark processing, the processing cost is high, the processing precision cannot meet the requirement of high precision, and the spline is not suitable for mass production and application.

Disclosure of Invention

The embodiment of the invention provides a spline sleeve, which aims to solve the problems of high cost and low precision of spline machining by an electric spark process in the prior art. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.

According to a first aspect of embodiments of the present invention, there is provided a splined sleeve.

In some alternative embodiments, the spline housing is a hollow cylindrical structure as a whole, comprising:

the flower sleeve body 1 and the central hole 11; wherein the content of the first and second substances,

a group of guide end covers 2 and a group of turn-back end covers 3 are respectively fixed at two ends of the flower sleeve main body 1, one side of each guide end cover 2 is attached to the flower sleeve main body 1, and the other side of each guide end cover 2 is attached to the turn-back end cover 3;

two grooves are longitudinally formed in the inner side wall of the spline housing main body 1 and serve as ball main slide ways 8, the opening size of each groove is smaller than the diameter of each ball, balls 4 are embedded in the ball main slide ways 8, and the two grooves are symmetrically arranged relative to the center of a center hole;

two ball return slideways 9 are longitudinally arranged in the spline housing main body 1, each ball return slideway is arranged adjacent to the corresponding ball main slideway 8, and the transverse grooves of the ball return slideways 9 are communicated with the central hole 11;

the guide end cover 2 is provided with a guide groove 15 on one side attached to the flower sleeve main body 1, the guide groove 15 is communicated with a group of adjacent ball main slide ways 8 and ball return slide ways 9, the turning-back end cover 3 is provided with a turning-back groove 12 at a position corresponding to the guide groove 15, and the guide groove 15 and the turning-back groove 12 jointly form a channel 7 for communicating the ball main slide ways 8 and the ball return slide ways 9.

Optionally, a rivet column through hole 10 is longitudinally formed in the spline housing main body 1, a rivet column through hole is transversely slotted to be communicated with the central hole 11, rivet column through holes 16 are also formed in the guide end cover 2 and the turn-back end cover 3, and the spline housing main body 1, the guide end cover 2 and the turn-back end cover 3 are fixed by rivet columns 5.

Optionally, the ball main runner 8 is a gothic arch groove.

Optionally, the guide end cover is provided with a positioning hole, and the turning end cover is provided with a positioning pile matched with the positioning hole.

According to a second aspect of the embodiments of the present invention, there is provided a spline housing processing method.

In some optional embodiments, the method is used for processing the spline sleeve of any one of the optional embodiments, the ball main slide way, the ball return slide way and the rivet column through hole of the spline sleeve main body are communicated with the central hole, and the processing is completed by cutting with a slow-moving wire at one time.

According to a third aspect of embodiments of the present invention, a miniature ball spline assembly is provided.

In some alternative embodiments, a micro ball spline assembly includes a spline shaft, further including the spline housing of any of the alternative embodiments described above; wherein the content of the first and second substances,

the spline shaft is provided with a sliding groove, the sliding groove is matched with balls in the ball main slide way, one part of the balls in the ball main slide way are in the ball main slide way, the other part of the balls are in the sliding groove, and the spline shaft slides in a central hole of the spline sleeve.

The technical scheme provided by the embodiment of the invention has the following beneficial effects:

the ball main slide way, the ball return slide way and the rivet column through hole of the flower sleeve main body are communicated with the central hole, and the processing is completed by adopting slow-moving wire cutting at one time, so that the processing difficulty is reduced, the processing precision is improved, and the processing cost is greatly reduced.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

FIG. 1 is a schematic overall structural view of a spline housing shown in accordance with an exemplary embodiment;

FIG. 2 is a cross-sectional structural schematic view of the spline housing shown in accordance with an exemplary embodiment;

FIG. 3 is a schematic top structural view of the spline housing shown in accordance with an exemplary embodiment;

FIG. 4 is a schematic structural view of a guide end cap according to an exemplary embodiment;

FIG. 5 is a schematic diagram of a structure of a foldback end cap, according to an exemplary embodiment;

FIG. 6 is a schematic illustration of a process for manufacturing a spline housing according to an exemplary embodiment.

Reference numerals:

1. a flower case main body; 2. a guide end cover; 3. turning back an end cover; 4. a ball bearing; 5. riveting columns; 6. a groove; 7. a channel; 8. a ball main runner; 9. the ball returns to the slideway; 10. riveting the column through hole; 11. a central bore; 12. a folding groove; 13. riveting the column through hole; 14. positioning the pile; 15. a guide groove; 16. riveting the column through hole; 17. positioning holes; 18. and fixing the screw hole.

Detailed Description

The following description and the drawings sufficiently illustrate specific embodiments herein to enable those skilled in the art to practice them. Portions and features of some embodiments may be included in or substituted for those of others. The scope of the embodiments herein includes the full ambit of the claims, as well as all available equivalents of the claims. The terms "first," "second," and the like, herein are used solely to distinguish one element from another without requiring or implying any actual such relationship or order between such elements. In practice, a first element can also be referred to as a second element, and vice versa. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a structure, apparatus, or device that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such structure, apparatus, or device. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a structure, device or apparatus that comprises the element. The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like herein, as used herein, are defined as orientations or positional relationships based on the orientation or positional relationship shown in the drawings, and are used for convenience in describing and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. In the description herein, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, and indirect connections via intermediary media, where the specific meaning of the terms is understood by those skilled in the art as appropriate.

Herein, the term "plurality" means two or more, unless otherwise specified.

Herein, the character "/" indicates that the preceding and following objects are in an "or" relationship. For example, A/B represents: a or B.

Herein, the term "and/or" is an associative relationship describing objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.

Fig. 1 to 5 show an alternative embodiment of the spline housing of the present invention.

In this alternative embodiment, the spline housing is a hollow cylindrical structure as a whole, including: the flower sleeve body 1 and the central hole 11; wherein, the both ends of flower cover main part 1 are fixed with a set of direction end cover 2 and the end cover 3 that turns back respectively, and 2 one sides of direction end cover are laminated with flower cover main part 1 mutually, and 2 opposite sides of direction end cover are laminated with the end cover 3 that turns back mutually. Two grooves are longitudinally formed in the inner side wall of the spline housing main body 1 and serve as ball main slide ways 8, the opening size of each groove is smaller than the diameter of each ball to prevent the balls from being separated, the balls 4 are embedded in the ball main slide ways 8, and the two grooves are symmetrically arranged relative to the circle center of the central hole 11. Two ball return slideways 9 are longitudinally arranged in the spline housing main body 1, each ball return slideway is adjacent to a corresponding ball main slideway 8, the transverse grooves of the ball return slideways 9 are communicated with the central hole 11, and as shown in fig. 3, the ball return slideways 9 are communicated with the central hole 11 through the grooves 6. As shown in fig. 4, a guide groove 15 is formed on one side of the guide end cover 2, which is attached to the flower sleeve body 1, the guide groove 15 communicates with a group of adjacent ball main slide ways 8 and ball return slide ways 9, as shown in fig. 5, a folding groove 12 is formed in the position of the folding end cover 3, which corresponds to the guide groove 15, after the guide end cover 2 is attached to the folding end cover 3, the guide groove 15 and the folding groove 12 jointly form a channel 7 communicating the ball main slide ways 8 and the ball return slide ways 9, and the channel 7 guides the balls to roll between the ball main slide ways 8 and the ball return slide ways 9. When the balls roll to the guide end cover 2 and the return end cover 3, the balls are returned to enter the return slideway 9 through a channel formed by the guide groove 15 and the return groove 12.

When the spline works, the spline shaft slides in the spline housing center hole 11, the spline shaft is provided with a sliding groove, the sliding groove is matched with balls in the ball main slide way 8, one part of the balls in the ball main slide way 8 are in the ball main slide way 8, the other part of the balls are in the sliding groove of the spline shaft, the spline housing and the spline shaft are limited to slide relatively, and therefore the purpose that the spline shaft can move linearly relative to the spline housing and cannot rotate relatively is achieved.

In the spline housing, the ball main slide way, the ball return slide way and the rivet column through hole of the spline housing main body are communicated with the central hole, and the spline housing is processed at one time by adopting slow-moving wire cutting, so that the processing difficulty is reduced, the processing precision is improved, and the processing cost is greatly reduced.

Optionally, a rivet column through hole 10 is longitudinally formed in the spline housing main body 1, a rivet column through hole is transversely slotted to be communicated with the central hole 11, a rivet column through hole 16 is formed in the guide end cover 2, a rivet column through hole 13 is formed in the turn-back end cover 3, and the spline housing main body 1, the guide end cover 2 and the turn-back end cover 3 are fixed by the rivet column 5.

Optionally, the ball main ramp 8 is a gothic arch recess.

Optionally, the guide end cap is provided with two stud through holes 16, and the return end cap is provided with two stud through holes 13.

Optionally, the guide end cap 2 is provided with two positioning holes 17, and the turning end cap 3 is provided with positioning piles 14 adapted to the positioning holes.

Optionally, two fixing screw holes 18 are formed at the side of the spline housing body 1 for integrally fixing the spline housing.

In other alternative embodiments, the present invention further provides a micro ball spline assembly, comprising a spline shaft, further comprising the spline housing of any one of the above alternative embodiments; the spline shaft is provided with a sliding groove, the sliding groove is matched with balls in the ball main slide way 8, one part of the balls in the ball main slide way 8 are in the ball main slide way 8, the other part of the balls are in the sliding groove, and the spline shaft slides in a central hole of the spline sleeve.

When the spline shaft works, the spline shaft slides in the spline housing center hole 11, the spline shaft is provided with a sliding groove, the sliding groove is matched with balls in the ball main slide way 8, one part of the balls in the ball main slide way 8 are in the ball main slide way 8, the other part of the balls are in the sliding groove of the spline shaft, and the spline housing and the spline shaft are limited to slide relatively, so that the purpose that the spline shaft can move linearly relative to the spline housing and cannot rotate relatively is achieved.

In other optional embodiments, the invention further provides a spline housing processing method, which is used for processing the spline housing of any optional embodiment, the ball main slide way, the ball return slide way and the rivet column through hole of the spline housing main body are communicated with the central hole, and the central hole, the ball main slide way, the ball return slide way and the rivet column through hole are cut by the quenched rolling needle slow-walking wire, so that the processing can be completed at one time, the processing difficulty is reduced, the processing precision is improved, and the processing cost is greatly reduced.

The processing method of the spline housing comprises the following steps:

step S1: and selecting the quenched roller, and drilling a hole by using a central electric spark.

Step S2: and placing the roller in the positioning tool.

Step S3: and (5) threading the slow-moving wire.

Step S4: and (3) running a slow wire walking program, cutting an inner closed curve as shown in fig. 6 by the slow wire walking program, and finishing the cutting of the central hole, the ball main slideway, the ball return slideway and the rivet column through hole at one time.

The wire cutting processing technology comprises the following steps:

step S41: firstly, a cutting wire with the diameter of 0.20mm is used for processing each type hole of the spline housing to the required size.

And step S42, replacing the cutting wire with the diameter of 0.10 mm.

And step S43, re-aligning the center, and precisely positioning the lower deflection point of the cutting wire by using the cutting wire guide insert point type support with 2 diamond cones to precisely guide the cutting wire.

And step S44, avoiding the contour line of the molded hole and processing the structure outside the molded hole.

Alternatively, the fixing screw hole 18 at the side of the body of the flower case is spark-machined.

The slow-moving wire cutting machine tool is widely and importantly applied, and in the production and machining processes of precision mechanical parts, the dimensional precision directly influences the assembly precision of the mechanical parts, the precision of parts, the service life of products and the like.

Because the precision requirement of the workpiece machined by the slow-moving wire is high, if the workpiece is neglected in the machining process, the workpiece can be scrapped, and meanwhile, the manufacturing cost and the machining period of the die can be negatively influenced.

The spline housing belongs to female die machining, before wire cutting machining, the spline housing machining raw material is a bearing steel roller, cold machining and hot machining are carried out, large residual stress is generated inside the spline housing, the residual stress is a relatively balanced stress system, and when a large amount of waste materials are removed by wire cutting, the stress is released along with balance damage. Therefore, during the on-line cutting process of the spline housing, the spline housing generates non-directional and irregular deformation along with the action of the original internal stress and the influence of the processing thermal stress generated by spark discharge, so that the thickness of the cutting tool at the back is uneven, and the processing quality and the processing precision are influenced. The spline housing has the advantages of simple structure and low cost, and the processing method has the following advantages:

firstly, the method comprises the following steps: the spline housing processing method provided by the invention adopts a one-time cutting route, so that the workpiece and the clamp are always kept in the same coordinate system in the processing process, and the influence of stress deformation is avoided.

Secondly, the method comprises the following steps: the cutting mode of processing the spline housing by the disposable linear cutting route can ensure that enough time is available for releasing internal stress after each type hole is processed, the mutual influence and micro deformation of each type hole caused by different processing sequences can be reduced to the minimum degree, and the processing size precision of the template is better ensured.

The present invention is not limited to the structures that have been described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims (8)

1. The utility model provides a spline cover which characterized in that wholly is hollow cylinder structure, includes:

the flower piece sleeve comprises a flower piece sleeve main body (1) and a central hole (11); wherein the content of the first and second substances,

a group of guide end covers (2) and a turn-back end cover (3) are respectively fixed at two ends of the flower sleeve main body (1), one side of each guide end cover (2) is attached to the flower sleeve main body (1), and the other side of each guide end cover (2) is attached to the turn-back end cover (3);

two grooves are longitudinally formed in the inner side wall of the spline housing main body (1) and serve as ball main slide ways (8), the opening size of each groove is smaller than the diameter of each ball, balls (4) are embedded in the ball main slide ways (8), and the two grooves are symmetrically arranged relative to the center of a center hole;

two ball return slideways (9) are longitudinally arranged in the spline housing main body (1), each ball return slideway is arranged adjacent to the corresponding ball main slideway (8), and the transverse grooves of the ball return slideways (9) are communicated with the central hole (11);

guide way (15) are seted up to direction end cover (2) and the laminating one side of flower cover main part (1), and adjacent a set of ball owner slide (8) and ball return slide (9) are communicate in guide way (15), and turn back end cover (3) are seted up in the position department that corresponds to guide way (15) and are turned back groove (12), and guide way (15) and turn back groove (12) constitute passageway (7) that communicate ball owner slide (8) and ball return slide (9) jointly.

2. The spline housing of claim 1,

rivet column through holes (10) are longitudinally formed in the spline housing main body (1), rivet column through holes are transversely formed in grooves and communicated with the central hole (11), rivet column through holes (16) are also formed in the guide end cover (2) and the turn-back end cover (3), and the spline housing main body (1), the guide end cover (2) and the turn-back end cover (3) are fixed through rivet columns (5).

3. The spline housing of claim 1,

the ball main slideway (8) is a groove with a Gothic arch structure.

4. The spline housing of claim 1,

the guide end cover is provided with a positioning hole, and the turning end cover is provided with a positioning pile matched with the positioning hole.

5. A spline housing processing method for processing a spline housing according to any one of claims 1 to 4, comprising the steps of:

step S1: selecting the quenched roller, and drilling a hole by using a central electric spark;

step S2: placing the roller in the positioning tool;

step S3: threading the slow-speed wire;

step S4: and running a slow wire walking program, cutting an inner closed curve by the slow wire walking program, and completing cutting of the central hole, the ball main slideway, the ball return slideway and the rivet column through hole at one time.

6. The method of claim 5, wherein the key sleeve is formed by a plurality of cutting tools,

the wire cutting processing technology comprises the following steps:

step S41: firstly, machining each type hole of the spline housing to a required size by using a cutting wire with the diameter of phi 0.20 mm;

step S42, replacing a cutting wire with the diameter of phi 0.10 mm;

step S43, re-aligning the center, and using a cutting wire guide plug-in point type support with 2 diamond cones to position the lower deflection point of the cutting wire to guide the cutting wire;

and step S44, avoiding the contour line of the molded hole and processing the structure outside the molded hole.

7. The method of claim 5, wherein the key sleeve is formed by a plurality of cutting tools,

and the fixed screw hole at the side of the flower piece sleeve main body is processed by electric spark.

8. A miniature ball spline assembly comprising a spline shaft and further comprising a spline housing according to any one of claims 1 to 4; wherein the content of the first and second substances,

the spline shaft is provided with a sliding groove, the sliding groove is matched with balls in the ball main slide way, one part of the balls in the ball main slide way are in the ball main slide way, the other part of the balls are in the sliding groove, and the spline shaft slides in a central hole of the spline sleeve.

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