A high-precision, miniature ball screw pair synchronous running machine

Abstract

The present invention belongs to the technical field of rolling functional components, and is particularly a high-precision, miniature ball screw pair synchronous running-in machine, comprising a bed and a headstock spindle, the headstock spindle is rotatably connected to the surface of the bed, a pneumatic three-jaw chuck is installed on the headstock spindle, a linear slide is fixed to the surface of the bed, and a linear slide is slidably connected to the top of the linear slide. The present invention can clamp ball screw bodies of different sizes in the bed by arranging a three-jaw chuck, a linear slide, an ejector pin and a tailstock, so that the ball screw body can cooperate with the headstock spindle in linkage, and by arranging a connecting seat, a stop plate, a deep groove ball bearing and a stop groove, the friction can be reduced when the ball screw pair is run-in, so as to avoid affecting the accuracy of the ball screw pair after running-in, the stop plate and the connecting seat are not an integrated structure, and can be replaced after a period of use, and the device has a simple structure, a small volume, a high degree of automation, and is very convenient to operate.

Description

Technical Field

[0001] The invention relates to the technical field of rolling functional components, in particular to a high-precision, miniature ball screw pair synchronous running machine. Background Art

[0002] In recent years, with the continuous improvement of automation levels at home and abroad, the market requirements for ball screw pairs are getting higher and higher, and the demand for small ball screw pairs is gradually increasing, which puts higher requirements on their transmission accuracy. Ball screws, nuts, steel balls, and return devices all have processing errors in the processing and manufacturing process. After assembly, high-speed operation can easily cause excessive wear of steel balls and ball screws, thereby affecting the transmission accuracy of the ball screw pair. For cold-rolled screws, a running-in machine is required to conduct a trial run of the ball screw pair after assembly to improve the performance of the ball screw pair.

[0003] However, there are two traditional running-in machines for miniature ball screw pairs. One is a manual running-in machine, in which the two ends of the screw are supported by a top, and the ball screw is driven to rotate by moving the nut. This is a reverse transmission with a large friction coefficient. The accuracy of the ball screw pair after running-in will be reduced. The other running-in mechanism is an electric running-in machine, which is fixed to the connecting seat by the running-in nut. The coaxial accuracy of the connecting seat and the front and rear supports is difficult to control. The accuracy of the ball screw pair after running-in will be reduced to varying degrees. Therefore, we proposed a high-precision, miniature ball screw pair synchronous running-in machine to solve these problems. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the present invention provides a high-precision, miniature ball screw pair synchronous running machine, which solves the problems raised in the above-mentioned background technology.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0008] A high-precision, miniature ball screw pair synchronous running machine comprises a bed and a headstock spindle, the headstock spindle is rotatably connected to the surface of the bed, a pneumatic three-jaw chuck is installed on the headstock spindle, a linear slide is fixed to the surface of the bed, the top of the linear slide is slidably connected to the linear slide, a connecting seat is installed on the top of the linear slide, a tailstock is slidably connected in the linear slide, the surface of the tailstock is rotatably connected to the top through a bearing, a ball screw body is arranged above the connecting seat, one end of the ball screw body is clamped in the three-jaw chuck, and the other end is in close contact with one end of the top, the nut on the ball screw body is detachably installed with a swing rod, a stop plate is fixed on the top of the connecting seat, and a deep groove ball bearing is fixed to the bottom end of the swing rod.

[0009] Furthermore, the headstock spindle is controlled to rotate by a servo motor mechanism, and the tailstock is manually adjusted to move in the linear slide rail by a person.

[0010] Furthermore, a rotation-stop groove is provided on the top of the rotation-stop disk, and the deep groove ball bearing is vertically arranged in the rotation-stop groove in a natural state, and a gap of 0.5 mm is left between the deep groove ball bearing and both sides of the rotation-stop groove.

[0011] Furthermore, the linear slide is controlled by a servo motor mechanism to move synchronously with the nut.

[0012] Furthermore, the anti-rotation disk is detachably fixed on the top of the connecting seat by screws.

[0013] (III) Beneficial effects

[0014] Compared with the prior art, the present invention provides a high-precision, miniature ball screw pair synchronous running machine, which has the following beneficial effects:

[0015] The present invention can clamp ball screw bodies of different sizes in the bed by arranging a three-jaw chuck, a linear slide rail, a thimble and a tailstock, so that the ball screw body can be linked with the headstock spindle; by arranging a connecting seat, a stop plate, a deep groove ball bearing and a stop groove, the friction force can be reduced when the ball screw pair is run-in, and the accuracy of the ball screw pair is not affected after running-in; the stop plate and the connecting seat are not integrated structures and can be replaced after a period of use; the device has a simple structure, a small size, a high degree of automation and is very convenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the present invention from a first viewing angle;

[0017] Figure 2 It is a schematic diagram of the structure of the second viewing angle of the present invention;

[0018] Figure 3 It is a schematic diagram of the enlarged structure of point A of the present invention.

[0019] In the figure: 1. bed; 2. headstock spindle; 3. three-jaw chuck; 4. linear slide; 5. linear slide; 6. connecting seat; 7. tailstock; 8. center; 9. ball screw body; 10. nut; 11. swing rod; 12. anti-rotation plate; 13. deep groove ball bearing; 14. anti-rotation groove. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Example

[0022] like Figure 1 , Figure 2 and Figure 3 As shown, a high-precision, micro ball screw pair synchronous running machine proposed in one embodiment of the present invention includes a bed 1 and a headstock spindle 2, the headstock spindle 2 is rotatably connected to the surface of the bed 1, a pneumatic three-jaw chuck 3 is installed on the headstock spindle 2, a linear slide 4 is fixed to the surface of the bed 1, a linear slide 5 is slidably connected to the top of the linear slide 4, a connecting seat 6 is installed on the top of the linear slide 5, a tailstock 7 is slidably connected inside the linear slide 4, and a top 8 is rotatably connected to the surface of the tailstock 7 through a bearing. A ball screw body 9 is arranged above the connecting seat 6, one end of the ball screw body 9 is clamped in the three-jaw chuck 3, and the other end is in close contact with one end of the top 8. The nut 10 on the ball screw body 9 is detachably mounted with a swing rod 11, a stop plate 12 is fixed on the top of the connecting seat 6, and a deep groove ball bearing 13 is fixed on the bottom end of the swing rod 11. In summary, when running in the micro ball screw pair, the forward rotation and speed of the head frame spindle 2 are set through the CNC system, and the ball screw body 9 starts to rotate forward. The nut 10 can be driven to move axially, and the nut 10 can drive the deep groove ball bearing 13 to move axially through the swing rod 11. At this time, the CNC system can make the linear slide 5 and the nut 10 move synchronously, so that the anti-rotation disk 12 on the connecting seat 6 and the deep groove ball bearing 13 can be moved synchronously to prevent the deep groove ball bearing 13 from disengaging from the anti-rotation disk 12. When the ball screw body 9 rotates, the nut 10 will rotate slightly synchronously. When the outer ring of the deep groove ball bearing 13 driven by the swing rod 11 below the nut 10 contacts the side of the anti-rotation disk 12, the nut 10 stops rotating, the outer ring of the deep groove ball bearing 13 rotates, and the nut 10 strictly moves axially along the direction of the ball screw body 9. The limit position of the movement of the nut 10 is set by the CNC system, and after reaching the limit position, the running-in machine head frame spindle 2 is rotated in the opposite direction to make the ball screw body 9 rotate in the opposite direction. After the above operation, the nut 10 moves to the limit position in the opposite direction, and through such reciprocating running-in, the ball screw pair is run-in to meet the use requirements.

[0023] like Figure 1 and Figure 2As shown, in some embodiments, the headstock spindle 2 is controlled to rotate by a servo motor mechanism, and the tailstock 7 is manually adjusted to move in the linear slide rail 4 by personnel, so that the staff can clamp the ball screw bodies 9 of different sizes to cooperate with the headstock spindle 2 linkage.

[0024] like Figure 3 As shown, in some embodiments, a stop groove 14 is provided on the top of the stop disk 12, and the deep groove ball bearing 13 is vertically located in the stop groove 14 in a natural state. A gap of 0.5 mm is left on both sides of the deep groove ball bearing 13 and the stop groove 14, so that the deep groove ball bearing 13 can be smoothly limited when the nut 10 drives the deep groove ball bearing 13 to rotate slightly synchronously through the swing rod 11.

[0025] like Figure 1 and Figure 2 As shown, in some embodiments, the linear slide 5 is controlled by a servo motor mechanism to move synchronously with the nut 10, which can prevent the deep groove ball bearing 13 from escaping from the anti-rotation groove 14 of the anti-rotation disk 12 installed on the linear slide 5.

[0026] like Figure 3 As shown, in some embodiments, the anti-rotation disk 12 is detachably fixed on the top of the connecting seat 6 by screws. When the anti-rotation disk 12 is worn out after long-term use or needs to be replaced with a different size of the anti-rotation disk 12, the anti-rotation disk 12 is replaced.

[0027] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-precision, miniature ball screw pair synchronous running machine, comprising a bed (1) and a headstock spindle (2), characterized in that: The headstock spindle (2) is rotatably connected to the surface of the bed (1); a pneumatic three-jaw chuck (3) is installed on the headstock spindle (2); a linear slide rail (4) is fixed to the surface of the bed (1); a linear slide (5) is slidably connected to the top of the linear slide rail (4); a connecting seat (6) is installed on the top of the linear slide rail (5); a tailstock (7) is slidably connected inside the linear slide rail (4); a top (8) is rotatably connected to the surface of the tailstock (7) via a bearing; a ball screw body (9) is arranged above the connecting seat (6); one end of the ball screw body (9) is clamped in the three-jaw chuck (3); and the other end is connected to one end of the top (8). The ends are in close contact, the nut (10) on the ball screw body (9) is detachable and is equipped with a swing rod (11), a stop plate (12) is fixed on the top of the connecting seat (6), a deep groove ball bearing (13) is fixed on the bottom end of the swing rod (11), the head frame spindle (2) is controlled to rotate by a servo motor mechanism, the tailstock (7) is manually adjusted by personnel to move in the linear slide rail (4), a stop groove (14) is provided on the top of the stop plate (12), the deep groove ball bearing (13) is vertically in the stop groove (14) in a natural state, and a gap of 0.5 mm is left on both sides of the deep groove ball bearing (13) and the stop groove (14).

2. A high-precision, miniature ball screw pair synchronous running machine according to claim 1, characterized in that: The linear slide (5) is controlled by a servo motor mechanism to move synchronously with the nut (10).

3. A high-precision, miniature ball screw pair synchronous running machine according to claim 2, characterized in that: The anti-rotation disk (12) is detachably fixedly mounted on the top of the connecting seat (6) by means of screws.

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