CN111173846B - A precision slider ball automatic assembly machine and assembly method thereof - Google Patents

Abstract

The invention discloses a precision slider ball automatic assembly machine and an assembly method thereof, comprising a frame and a large base plate, on which a ball supply component, a CNC double-axis automatic ball transport component, a CNC single-axis displacement component and a slider end cover automatic locking component are arranged in sequence; the CNC single-axis displacement component is provided with an assembly positioning fixture, on which a slider body to be assembled and a movable assembly transition fixture are fixed, the CNC double-axis automatic ball transport component is used to drive an automatic ball taking component to obtain a corresponding number of balls from a ball supply and conveying component and move them to a ball assembly area, release the transported balls into the assembly transition fixture and then assemble them into the raceway of the slider body; the CNC single-axis displacement component is used to transport the slider body after ball assembly and the slider end cover placed thereon from the ball assembly area to the corresponding position of the slider end cover automatic locking component; the slider end cover automatic locking component is used to automatically lock the slider body and the slider end cover.

Description

A precision slider ball automatic assembly machine and assembly method thereof

Technical Field

The invention relates to the technical field of precision slider production, and in particular to a precision slider ball automatic assembly machine and an assembly method thereof.

Background Art

Linear guides, also known as linear guides and linear slides, include high-precision guides and slider components. They are used in linear reciprocating motion situations and can achieve high-precision linear motion under high loads. They are commonly used guide motion components in the industrial field and are indispensable basic components in the fields of machine tools, automation equipment, etc. Due to the high precision requirements, domestic users now usually give priority to linear guides from foreign brands such as Germany and Japan. There are still relatively few domestic companies that produce high-precision linear guides. There is a large gap between domestic products and foreign advanced levels in terms of technical performance, level and industrialization. The market share of high-end rolling functional components is less than 5%, and the market share of mid-range rolling functional components is less than 30%, which has become one of the bottlenecks restricting the rapid development of domestic high-end CNC machine tools. Due to the high price of foreign brands of linear guides, most domestic users still hope that domestic brands of high-precision linear guides can further improve accuracy and quality and further seize market share.

In order to improve the accuracy and quality of slider components, every process step in the production process must be refined. After the slider body parts in the slider components are processed, it is necessary to install precision-matched balls in the slider body raceway. Due to the large number of balls that need to be assembled in each slider and the complex structure of the slider raceway, domestic companies can only use simple assembly fixtures for manual assembly during assembly. When manual assembly is used, the assembly speed is slow, and the number of balls is likely to be insufficient during the assembly process. Multiple inspections are required after assembly, resulting in low assembly efficiency. In addition, manual assembly is affected by human operation, which is not conducive to improving the accuracy retention, reliability, and service life of slider components. Further improvement is urgently needed.

Due to the complex structure and difficult assembly process of high-precision slider automatic assembly equipment, all major foreign brands protect the slider automatic assembly equipment and production process as technical secrets. It is difficult to retrieve relevant technology and patent documents. For example, brands such as Japan's THK, NSK, IKO, Germany's REXROTH Rexroth, and Hiwin Technology Co., Ltd. have not filed patent applications for high-precision slider automatic assembly. In addition, domestic companies have not filed patent applications for high-precision slider automatic assembly.

At present, domestic slide rail manufacturers used in the furniture drawer field have developed some automatic assembly equipment and applied for some patents, such as the application publication number CN107225381A, the patent name is a slide rail automatic assembly machine disclosed for drawer slide rails; the application publication number CN109848695A, the patent name is a ball-loading mechanism for an automatic assembly machine for slide rail assemblies disclosed for ball assembly in slide rail assemblies. However, since the drawer slide rail structure is completely different from the linear guide rail structure, the linear guide rail is a high-precision product with different application scenarios, and the patent documents in the above fields are not of reference significance.

Therefore, the automated assembly equipment used for high-precision slider component products can only be independently developed based on the company's production process. The research and development process needs to coordinate and deal with issues such as assembly process, automatic product transportation, positioning and clamping, automatic actuator design, and program control. Only in this way can we develop high-precision slider component automated assembly equipment that is truly suitable for production companies.

Summary of the invention

In order to solve the above problems, the purpose of the present invention is to provide a precision slider ball automatic assembly machine and an assembly method thereof, which can automatically and quantitatively obtain balls of different precision sizes from a ball supply device for automatic assembly according to the raceway size data in the slider body detected before assembly. The ball assembly can automatically lock the slider body and the slider end cover together, and the automatic loading and assembly efficiency is high and the assembly accuracy is good, which is beneficial to improving the accuracy retention, reliability and service life of the slider components.

To achieve the above object, the present invention adopts the following technical solutions:

A precision slider ball automatic assembly machine, comprising a frame and a large bottom plate fixed on the frame, wherein the large bottom plate is provided with a ball supply component, a CNC double-axis automatic ball transport component, a CNC single-axis displacement component and a slider end cover automatic locking component in sequence; the ball supply component is provided with a mounting bracket and two or more sets of ball supply and conveying components, the CNC double-axis automatic ball transport component is provided with an automatic ball taking component capable of reciprocating movement to quantitatively obtain balls; the CNC single-axis displacement component is provided with an assembly positioning fixture, the slider body to be assembled is fixed on the assembly positioning fixture, and during the ball assembly process, a movable assembly transition fixture for taking and placing is provided on the slider body, and the assembly A ball guide channel is provided in the transition fixture; the CNC dual-axis automatic ball transport component is used to drive the automatic ball retrieval component to obtain a corresponding number of balls from the ball supply and conveying assembly and move to the ball assembly area to align with the position of the assembly transition fixture, release the transported balls into the assembly transition fixture and then assemble them into the raceway of the slider body; the CNC single-axis displacement component is used to transport the slider body after ball assembly and the slider end cover placed thereon from the ball assembly area to the corresponding position of the slider end cover automatic locking component; the slider end cover automatic locking component is used to automatically lock the slider body and the slider end cover.

Furthermore, the ball supply and conveying assembly includes a barrel, a bead dropping mechanism plate and a movable slide. The upper end of the bead dropping mechanism plate is connected to the bottom of the barrel. A dropping channel is provided in the bead dropping mechanism plate. The movable slide is arranged in a guide groove at the lower end of the bead dropping mechanism plate to movably block the dropping channel. The movable slide is connected to a sliding guide assembly and a return spring.

Furthermore, the CNC dual-axis automatic ball transport component is provided with an X-axis motion platform composed of a first guide rail assembly, a first ball screw and a first servo motor drive assembly, the X-axis motion platform is provided with a Y-axis motion platform composed of a second guide rail assembly, a second ball screw and a second servo motor drive assembly, and the automatic ball picking component is arranged on the Y-axis motion platform.

Furthermore, the automatic bead taking component is provided with at least one group of replaceable ball bearing tubes, each group of the ball bearing tubes is provided with four thin tubes corresponding to the raceway entrances in the slider body, and the lower end of each group of the ball bearing tubes is provided with a movable blocking mechanism, the ball bearing tubes are fixed in the bead tube mounting plate, guide slides are provided on both sides of the bead tube mounting plate, a guide shaft is sleeved in the guide slide, and the lower end of the guide shaft is fixed to the Y-axis motion platform, and a movable bead taking mechanism is provided on the top surface of the bead tube mounting plate, the movable bead taking mechanism comprises a top cylinder mounting plate, a horizontal cylinder and a bead taking lever, the cylinder mounting plate is mounted on the bead tube mounting plate, the horizontal cylinder is mounted on the cylinder mounting plate, the bead taking lever is fixed to the output end of the horizontal cylinder, and a lifting cylinder is provided at the bottom of the bead tube mounting plate, when taking beads, the lifting cylinder lifts the bead tube mounting plate and pushes the movable slide through the bead taking lever, so that the balls stored in the bead falling mechanism plate fall into the ball bearing tube through the dropping channel to realize quantitative acquisition of balls.

Furthermore, the movable sealing mechanism includes a movable sealing plate and a sealing driving cylinder, the movable sealing plate movably covers the lower end of the ball bearing tube, the movable sealing plate is fixed to the output end of the sealing driving cylinder, and the sealing driving cylinder is fixed to the bead tube mounting plate through a connecting plate.

Furthermore, the CNC single-axis displacement component is provided with a single-axis motion platform composed of a third guide rail assembly, a third ball screw and a third servo motor drive assembly, and the single-axis motion platform is provided with a fixture fixing plate; the assembly positioning fixture includes a slider positioning base and a slider positioning column placed on the fixture fixing plate, and the slider body is positioned by the slider positioning base and the slider positioning column.

Furthermore, a gantry-type two-axis CNC motion platform is provided in the automatic locking component of the slider end cover, and an automatic screw locking device is provided on the two-axis CNC motion platform, and the automatic screw locking device is connected to an external automatic screw feeding device.

According to the above-mentioned assembly method of a precision slider ball automatic assembly machine, it includes the following steps:

S1. Preparation for quantitative ball material collection: the ball supply and conveying components are placed according to the numbers, and the barrels corresponding to the different numbers are filled with balls of different precision sizes. According to the size data of the raceway in the slider body obtained by the pre-assembly test, the automatic bead collection component is driven by the CNC dual-axis automatic bead transport component to move to the bottom of the corresponding bead drop mechanism plate through program setting control, and the ball receiving tube is aligned with the drop channel position;

S2, loading the slider body: before the ball bearing assembly, the initial position of the CNC single-axis displacement component is in the ball bearing assembly area, the slider body is placed on the assembly positioning fixture, and the assembly transition fixture is placed on the slider body;

S3, quantitative ball extraction: the lifting cylinder lifts up the bead tube mounting plate, the horizontal cylinder retracts, and the movable slide is driven by the bead extracting lever to move, so that the balls pass through the blanking channel and enter the ball receiving tube. When the ball receiving tube is full of balls, the set number of balls is obtained, the horizontal cylinder and the lifting cylinder are reset in turn, and the movable slide seals the blanking channel again. The CNC dual-axis automatic bead transport component drives the automatic bead extracting component to move from the bottom of the bead dropping mechanism plate to the ball assembly area, and the lower end of the ball receiving tube is aligned with the entrance of the ball guide channel in the assembly transition fixture;

S4, ball assembly: the blocking driving cylinder in the movable blocking mechanism drives the movable blocking plate to move, and the balls in the ball receiving tube fall into the rolling path of the slider body through the ball guide channel in the assembly transition fixture, and the assembly is completed after all the balls enter the slider body;

S5, loading the slider end cover: remove the assembly transition fixture placed on the slider body, and place the slider end cover on the slider body;

S6, automatic locking of the end cover: the CNC single-axis displacement component drives the slider body and the slider end cover to move from the initial position to the corresponding position of the slider end cover automatic locking component, and the slider end cover automatic locking component automatically delivers screws to lock the slider body and the slider end cover together;

S7, finished product unloading: the CNC single-axis displacement component drives the locked slider body and the slider end cover to return to the initial position, removes the finished product, and repeats the operation.

Furthermore, when the ball is assembled in step S4, a vibration device is added to the bottom of the assembly positioning fixture or the fixture fixing plate to apply a vibration force, so that the assembly transition fixture and the slider body vibrate along with the assembly positioning fixture during the ball blanking process.

Furthermore, before and after the ball assembly in step S4, lubricating oil is added to the raceway of the slider body through the ball guide channel in the assembly transition fixture; a removable automatic refueling device is provided on the upper part of the assembly transition fixture, and the automatic refueling device is connected to an external lubricating oil supply device through a refueling pipe.

The present invention has the following beneficial effects:

1. The present invention analyzes the assembly process of the slider ball, sets a ball supply component, a CNC double-axis automatic ball transport component, a CNC single-axis displacement component and a slider end cover automatic locking component according to the assembly process, uses the CNC double-axis automatic ball transport component to drive the automatic ball taking component to reciprocate to achieve quantitative ball acquisition and feeding, and uses the CNC single-axis displacement component to transport the slider body and the slider end cover after the ball assembly is completed from the ball assembly area to the slider end cover automatic locking component for automatic locking, so that the assembly automation degree is high, the assembly efficiency is high, and the assembly precision is good;

2. The ball supply component of the present invention is provided with multiple sets of ball supply and conveying assemblies, and balls of different dimensional precision can be placed in each set of ball supply and conveying assemblies, so that balls of different dimensional precision can be selected for precise matching and assembly according to the dimensional data of the raceway in the slider body detected before assembly, and the accuracy of the slider product after assembly can be better guaranteed; the ball supply and conveying assembly has a stable and reliable structure for automatically dropping and conveying balls, and can smoothly convey balls;

3. At least one set of replaceable ball bearing tubes is provided in the automatic ball taking component of the present invention. When the specification of the slider changes, the ball bearing tubes of different lengths and diameters can be replaced. The length of a set of ball bearing tubes is used to quantitatively obtain the number of balls to be assembled in the slider. The movable blocking mechanism and the movable ball taking mechanism are automatically coordinated to ensure the accurate number of balls during the assembly process, and there will be no shortage of balls, thereby ensuring the smooth realization of ball assembly automation.

4. The CNC dual-axis automatic ball transport component and CNC single-axis displacement component of the present invention are composed of high-precision guide rail components, ball screws and servo motors. Through the programming control of the controller, they can accurately move and position to realize the transportation and positioning of parts such as balls and slider bodies, with high operating speed, further ensuring assembly efficiency;

5. The present invention positions the slider body well by setting a special assembly positioning fixture, and the positioning is accurate and reliable, ensuring that the slider body is not easy to move during assembly; the assembly transition fixture is cleverly provided with a ball guide channel, which is convenient for accurate alignment and connection with the ball receiving tube in the automatic ball taking component. The assembly transition fixture and the slider body can vibrate slightly with the assembly positioning fixture during the ball dropping process, and the balls quantitatively obtained from the ball receiving tube are accurately loaded into the raceway in the slider body, ensuring accurate assembly in place, and the balls will not be stuck in the ball guide channel. The assembly is smooth and reliable, and it is not easy to fail;

6. The present invention provides an automatic locking component for the slider end cover to automatically convey screws to lock the slider body and the slider end cover together. A gantry-type two-axis CNC motion platform is provided in the automatic locking component for the slider end cover. The position can be adjusted and set through programming control to ensure accurate locking position, strong adaptability, and the ability to automatically lock sliders of various specifications.

In summary, the present invention designs special assembly equipment suitable for automatic loading and assembly of sliders, balls and end covers by coordinating the issues of ball assembly process, automatic ball conveying, slider positioning and clamping, automatic assembly mechanism and program control. The equipment has high assembly efficiency and good assembly accuracy, which is beneficial to improving the accuracy retention, reliability and service life of the slider components. Moreover, some processes of the special assembly equipment, such as the automatic loading of the end covers, also reserve room for further improvement, which is suitable for gradual improvement in the future.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic front view of a precision slider ball automatic assembly machine according to the present invention;

FIG2 is a perspective schematic diagram of the automatic assembly machine for precision sliders and balls of the present invention;

FIG3 is a perspective schematic diagram of a CNC dual-axis automatic ball transport component of the present invention;

FIG4 is a perspective schematic diagram of a ball supply component of the present invention;

FIG5 is an exploded schematic diagram of the ball supply component of the present invention;

FIG6 is a three-dimensional schematic diagram of a numerically controlled single-axis displacement component and an assembly positioning fixture portion of the present invention;

FIG7 is a schematic front view of the automatic bead taking component of the present invention;

FIG8 is a perspective schematic diagram of the automatic bead taking component of the present invention;

FIG. 9 is a schematic cross-sectional view of the slider, the assembly positioning fixture and the assembly transition fixture of the present invention.

Description of reference numerals:

1. Frame; 2. Large base plate; 3. Ball supply component; 31. Mounting bracket; 32. Ball supply and conveying component; 321. Barrel; 322. Ball drop mechanism plate; 3221. Dropping channel; 3222. Guide groove; 323. Movable slide plate; 324. Sliding guide component; 325. Reset spring; 4. CNC dual-axis automatic ball transport component; 41. X-axis motion platform; 411. First guide rail component; 412. First ball screw; 413. First servo motor drive component; 42. Y-axis motion platform; 421. Second guide rail component; 422. Second ball screw; 423. Second servo motor drive component; 5. CNC single-axis displacement component; 51. Single-axis motion platform; 511. Third guide rail component; 512. Third ball screw; 513. First Three servo motor drive components; 52, fixture fixing plate; 6, slider end cover automatic locking component; 61, two-axis CNC motion platform; 62, automatic screw locking device; 7, automatic bead removal component; 71, ball bearing tube; 72, movable blocking mechanism; 721, movable blocking plate; 722, blocking drive cylinder; 723, connecting plate; 73, bead tube mounting plate; 74, guide slide plate; 75, guide shaft; 76, movable bead removal mechanism; 761, cylinder mounting plate; 762, horizontal cylinder; 763, bead removal lever; 77, lifting cylinder; 8, assembly positioning fixture; 81, slider positioning base; 82, slider positioning column; 9, assembly transition fixture; 901, ball guide channel; 100, slider body; 101, slider end cover; 200, ball assembly area.

DETAILED DESCRIPTION

The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

Referring to Figures 1-9, a precision slider ball automatic assembly machine includes a frame 1 and a large base plate 2 fixed on the frame 1, and the large base plate 2 is provided with a ball supply component 3, a CNC dual-axis automatic ball transport component 4, a CNC single-axis displacement component 5 and a slider end cover automatic locking component 6 in sequence; the ball supply component 3 is provided with a mounting bracket 31 and more than two sets of ball supply and conveying components 32. In this embodiment, nine sets of ball supply and conveying components 32 arranged in numbers are provided, and the CNC dual-axis automatic ball transport component 4 is provided with an automatic bead taking component 7 that can reciprocate and quantitatively obtain balls; the CNC single-axis displacement component 5 is provided with an assembly positioning fixture 8, and a slider body 100 to be assembled is fixed on the assembly positioning fixture 8. During the ball assembly process, a movable assembly transition fixture 9 is provided on the slider body 100. In order to facilitate the assembly The assembly transition fixture 9 can be composed of two or more parts, and a ball guide channel 901 is provided in the assembly transition fixture 9; the CNC dual-axis automatic ball transport component 4 is used to drive the automatic ball retrieval component 7 to obtain a corresponding number of balls from the ball supply and conveying component 32 and move it to the ball assembly area 200 to align with the position of the assembly transition fixture 9, and release the transported balls into the assembly transition fixture 9 and then assemble them into the raceway of the slider body 100; the CNC single-axis displacement component 5 is used to transport the slider body 100 after the ball assembly and the slider end cover 101 placed thereon from the ball assembly area 200 to the corresponding position of the slider end cover automatic locking component 6; the slider end cover automatic locking component 6 is used to automatically lock the slider body 100 and the slider end cover 101.

In the present embodiment, the assembly transition fixture 9 on the slider body 100 is manually removed and placed during the ball assembly process. After the equipment is running stably, a set of automatic robots for automatically removing and placing the assembly transition fixture 9 can be added for automatic operation. In the present embodiment, the placement of the slider end cover 101 is also manually operated. Subsequently, a robot for automatically conveying, loading and placing the slider end cover 101 can be added, leaving room for further improvement.

The detailed structures of the CNC dual-axis automatic ball transport component 4 and the CNC single-axis displacement component 5 are designed by conventional technical means known to mechanical technicians in the field, and the CNC dual-axis automatic ball transport component 4 and the CNC single-axis displacement component 5 and the electrical control part of the whole machine are electrically designed and PLC programmed and controlled by conventional technical means known to electrical technicians in the field, and the electrical control circuit can be arranged inside the frame 1. An outer cover can be added to the frame 1 to surround the entire upper part of the machine to improve the protection performance.

As shown in Figures 4-5, the ball supply and conveying assembly 32 includes a barrel 321, a bead dropping mechanism plate 322 and a movable slide 323. The upper end of the bead dropping mechanism plate 322 is connected to the bottom of the barrel 321. A dropping channel 3221 is provided in the bead dropping mechanism plate 322. The movable slide 323 is provided in the guide groove 3222 at the lower end of the bead dropping mechanism plate 322 to movably block the dropping channel 3221. The movable slide 323 is connected to a sliding guide assembly 324 and a reset spring 325. The entrance of the dropping channel 3221 is provided with a trumpet mouth that is convenient for receiving the balls.

The CNC dual-axis automatic ball transport component 4 is provided with an X-axis motion platform 41 composed of a first guide rail assembly 411, a first ball screw 412 and a first servo motor drive assembly 413, and the X-axis motion platform 41 is provided with a Y-axis motion platform 42 composed of a second guide rail assembly 421, a second ball screw 422 and a second servo motor drive assembly 423, and the automatic bead picking component 7 is arranged on the Y-axis motion platform 42. Corresponding connecting parts are arranged on the X-axis motion platform 41 and the Y-axis motion platform 42, and the unmarked parts in the figure can be referred to.

As shown in FIGS. 7-8 , the automatic bead taking component 7 is provided with at least one group of replaceable ball bearing tubes 71, each group of the ball bearing tubes 71 is provided with four thin tubes corresponding to the raceway entrances in the slider body 100, and each group of the ball bearing tubes 71 is provided with a movable blocking mechanism 72 at the lower end, and the ball bearing tubes 71 are fixed in a bead tube mounting plate 73, and guide slides 74 are provided on both sides of the bead tube mounting plate 73, and a guide shaft 75 is sleeved in the guide slide 74, and the lower end of the guide shaft 75 is fixed on the Y-axis motion platform 42, and a movable bead taking mechanism 76 is provided on the top surface of the bead tube mounting plate 73. 76 includes a top cylinder mounting plate 761, a horizontal cylinder 762 and a bead taking lever 763, wherein the cylinder mounting plate 761 is mounted on the bead tube mounting plate 73, the horizontal cylinder 762 is mounted on the cylinder mounting plate 761, the bead taking lever 763 is fixed to the output end of the horizontal cylinder 762, and a top cylinder 77 is provided at the bottom of the bead tube mounting plate 73. When taking beads, the top cylinder 77 lifts up the bead tube mounting plate 73 and pushes the movable slide plate 323 through the bead taking lever 763, so that the balls stored in the bead dropping mechanism plate 322 fall into the ball receiving tube 71 through the dropping channel 3221 to realize quantitative acquisition of balls.

In order to ensure the assembly accuracy, a set of ball bearing tubes 71 can be used to assemble one slider at a time. In this embodiment, two sets of ball bearing tubes 71 are designed, and two sliders can be assembled at a time. Assembling two sliders at a time requires higher processing accuracy of equipment and parts.

The movable blocking mechanism 72 includes a movable blocking plate 721 and a blocking driving cylinder 722. The movable blocking plate 721 movably covers the lower end of the ball bearing tube 71. The movable blocking plate 721 is fixed to the output end of the blocking driving cylinder 722. The blocking driving cylinder 722 is fixed to the bead tube mounting plate 73 through a connecting plate 723.

The CNC single-axis displacement component 5 is provided with a single-axis motion platform 51 composed of a third guide rail assembly 511, a third ball screw 512 and a third servo motor drive assembly 513, and a clamp fixing plate 52 is provided on the single-axis motion platform 51; in order to save space, in this embodiment, the third ball screw 512 and the third servo motor drive assembly 513 are installed on the bottom surface of the large base plate 2, and the third guide rail assembly 511 is installed on the upper surface of the large base plate 2, and a long groove is provided on the large base plate 2. A motion connector passing through the long groove is provided between the clamp fixing plate 52 and the third ball screw 512 for connection, so that the height of the single-axis motion platform 51 is reduced, and it will not interfere with or collide with the CNC dual-axis automatic ball transport component 4 and the slider end cover automatic locking component 6 during movement.

The assembly positioning fixture 8 includes a slider positioning base 81 and a slider positioning column 82 placed on the fixture fixing plate 52 , and the slider body 100 is positioned by the slider positioning base 81 and the slider positioning column 82 .

The slider end cover automatic locking component 6 is provided with a gantry-type two-axis CNC motion platform 61, and the two-axis CNC motion platform 61 is provided with an automatic screw locking device 62, and the automatic screw locking device 62 is connected to an external automatic screw feeding device. The slider end cover automatic locking component 6 and the external automatic screw feeding device are conventionally designed by mechanical technicians in this field, and such equipment can also be purchased as a complete set from a merchant.

According to the above-mentioned assembly method of a precision slider ball automatic assembly machine, it includes the following steps:

S1. Preparation for quantitative ball material collection: The ball supply and conveying assembly 32 is placed according to the number, and the barrels 321 corresponding to the different numbers are filled with balls of different precision sizes. According to the size data of the raceway in the slider body 100 obtained by the pre-assembly detection, the automatic bead collection component 7 is driven by the CNC dual-axis automatic bead transport component 4 to move to the bottom of the corresponding bead drop mechanism plate 322 through program setting control, and the ball receiving tube 71 is aligned with the drop channel 3221;

S2, loading the slider body 100: before the ball bearing assembly, the initial position of the CNC single-axis displacement component 5 is in the ball bearing assembly area 200, the slider body 100 is placed on the assembly positioning fixture 8, and the assembly transition fixture 9 is placed on the slider body 100;

S3, quantitative material extraction of balls: the lifting cylinder 77 lifts up the bead tube mounting plate 73, the horizontal cylinder 762 retracts, and the movable slide plate 323 is driven by the bead extracting lever 763 to move, so that the balls pass through the blanking channel 3221 and enter the ball receiving tube 71. When the ball receiving tube 71 is full of balls, the set number of balls is obtained, the horizontal cylinder 762 and the lifting cylinder 77 are reset in turn, and the movable slide plate 323 seals the blanking channel 3221 again, and the CNC dual-axis automatic bead transport component 4 drives the automatic bead extracting component 7 to move from the bottom of the bead dropping mechanism plate 322 to the ball assembly area 200, and the lower end of the ball receiving tube 71 is aligned with the entrance of the ball guide channel 901 in the assembly transition fixture 9;

S4. Ball assembly: The sealing drive cylinder 722 in the movable sealing mechanism 72 drives the movable sealing plate 721 to move, and the balls in the ball receiving tube 71 fall into the rolling path of the slider body 100 through the ball guide channel 901 in the assembly transition fixture 9. The assembly is completed after all the balls enter the slider body 100. The movable sealing plate 721 is a thin plate structure. During the process of the movable sealing plate 721 being moved away from the bottom of the ball receiving tube 71, the gap between the bottom of the ball receiving tube 71 and the top of the assembly transition fixture 9 is very small, and the balls will not fall out of the assembly transition fixture 9.

S5, loading the slider end cover 101: remove the assembly transition fixture 9 placed on the slider body 100, and place the slider end cover 101 on the slider body 100;

S6, automatic locking of the end cover: the CNC single-axis displacement component 5 drives the slider body 100 and the slider end cover 101 to move from the initial position to the corresponding position of the slider end cover automatic locking component 6, and the slider end cover automatic locking component 6 automatically delivers screws to lock the slider body 100 and the slider end cover 101 together;

S7, finished product unloading: the CNC single-axis displacement component 5 drives the locked slider body 100 and the slider end cover 101 to return to the initial position, remove the finished product, and repeat the operation.

Furthermore, when the ball is assembled in step S4, a vibration device is added to the bottom of the assembly positioning fixture 8 or the fixture fixing plate 52 to apply a vibration force, so that the assembly transition fixture 9 and the slider body 100 vibrate along with the assembly positioning fixture 8 during the ball blanking process. The vibration device can be a pneumatic vibrator or an electromagnetic vibrator.

Furthermore, before and after the ball assembly in step S4, lubricating oil is added to the raceway of the slider body 100 through the ball guide channel 901 in the assembly transition fixture 9, and a removable automatic refueling device is provided on the upper part of the assembly transition fixture 9. The automatic refueling device is provided with a refueling nozzle, and the automatic refueling device is connected to an external lubricating oil supply device through a refueling pipe; the automatic refueling device can also be directly arranged on the bottom surface of the Y-axis motion platform 42 in the CNC dual-axis automatic ball transport component 4 (the refueling device is not drawn in this embodiment).

Furthermore, in step S2, before loading the slider body 100, a slider end cover 101 needs to be pre-locked at one end of the slider body 100 to prevent the balls from leaking out from the lower end of the slider body 100; the end of the slider body 100 with the slider end cover 101 pre-locked is placed on the assembly positioning fixture 8; the slider end cover 101 can also be pre-locked on the slider body 100 and automatically locked by the slider end cover automatic locking component 6, and the slider end cover automatic locking component 6 can be fully utilized to perform alternating work before the balls are quantitatively taken out, thereby improving the utilization rate of the slider end cover automatic locking component 6 (because the slider end cover automatic locking component 6 has spare waiting time before the balls are quantitatively taken out, which can be further explored and utilized).

In this embodiment, both ends of the slider bodies 100 include ball retainers pre-installed thereon. When the present invention is used, the automatic assembly of the balls in the slider and the automatic locking of the end covers can be completed by operating according to the above-mentioned assembly method.

The above description is only a specific implementation mode of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made by using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims (7)

1. A precision slider ball automatic assembly machine, comprising a frame (1) and a large base plate (2) fixed on the frame (1), characterized in that: the large base plate (2) is provided with a ball supply component (3), a CNC dual-axis automatic ball transport component (4), a CNC single-axis displacement component (5) and a slider end cover automatic locking component (6) in sequence; The ball supply component (3) is provided with a mounting bracket (31) and two or more sets of ball supply and conveying components (32), and the CNC dual-axis automatic ball transport component (4) is provided with an automatic ball taking component (7) capable of reciprocating to quantitatively obtain balls; The numerically controlled single-axis displacement component (5) is provided with an assembly positioning fixture (8), a slider body (100) to be assembled is fixed on the assembly positioning fixture (8), and during the ball bearing assembly process, a movable assembly transition fixture (9) is provided on the slider body (100), and a ball bearing guide channel (901) is provided in the assembly transition fixture (9); The CNC dual-axis automatic ball transport component (4) is used to drive the automatic ball retrieval component (7) to obtain a corresponding number of balls from the ball supply and conveying component (32) and move them to the ball assembly area (200) to align with the position of the assembly transition fixture (9), release the transported balls into the assembly transition fixture (9), and then assemble them into the raceway of the slider body (100); The numerically controlled single-axis displacement component (5) is used to transport the slider body (100) after ball assembly and the slider end cover (101) placed thereon from the ball assembly area (200) to a corresponding position of the slider end cover automatic locking component (6); The slider end cover automatic locking component (6) is used to automatically lock the slider body (100) and the slider end cover (101); The ball supply and conveying assembly (32) comprises a barrel (321), a bead dropping mechanism plate (322) and a movable slide plate (323); the upper end of the bead dropping mechanism plate (322) is connected to the bottom of the barrel (321); a material dropping channel (3221) is provided in the bead dropping mechanism plate (322); the movable slide plate (323) is arranged in a guide groove (3222) at the lower end of the bead dropping mechanism plate (322) to movably block the material dropping channel (3221); and the movable slide plate (323) is connected to a sliding guide assembly (324) and a return spring (325); The numerically controlled dual-axis automatic ball transport component (4) is provided with an X-axis motion platform (41) composed of a first guide rail component (411), a first ball screw (412) and a first servo motor drive component (413); the X-axis motion platform (41) is provided with a Y-axis motion platform (42) composed of a second guide rail component (421), a second ball screw (422) and a second servo motor drive component (423); and the automatic ball removal component (7) is provided on the Y-axis motion platform (42); The automatic bead taking component (7) is provided with at least one group of replaceable ball bearing tubes (71), each group of the ball bearing tubes (71) is provided with four thin tubes corresponding to the raceway entrances in the slider body (100), and each group of the ball bearing tubes (71) is provided with a movable blocking mechanism (72) at the lower end, the ball bearing tubes (71) are fixed in a bead tube mounting plate (73), and guide slides (74) are provided on both sides of the bead tube mounting plate (73), and a guide shaft (75) is sleeved in the guide slide (74), and the lower end of the guide shaft (75) is fixed on the Y-axis motion platform (42), and a movable bead taking mechanism (76) is provided on the top surface of the bead tube mounting plate (73), and the movable bead taking mechanism (76) includes a top A cylinder mounting plate (761), a horizontal cylinder (762) and a bead taking lever (763), wherein the cylinder mounting plate (761) is mounted on the bead tube mounting plate (73), the horizontal cylinder (762) is mounted on the cylinder mounting plate (761), the bead taking lever (763) is fixed to the output end of the horizontal cylinder (762), and a lifting cylinder (77) is provided at the bottom of the bead tube mounting plate (73). When taking beads, the lifting cylinder (77) lifts up the bead tube mounting plate (73) and pushes the movable slide plate (323) through the bead taking lever (763), so that the balls stored in the bead dropping mechanism plate (322) fall into the ball receiving tube (71) through the dropping channel (3221), thereby realizing quantitative acquisition of the balls. 2. A precision slider ball automatic assembly machine according to claim 1, characterized in that: the movable blocking mechanism (72) includes a movable blocking plate (721) and a blocking drive cylinder (722), the movable blocking plate (721) movably covers the lower end of the ball receiving tube (71), the movable blocking plate (721) is fixed to the output end of the blocking drive cylinder (722), and the blocking drive cylinder (722) is fixed to the ball tube mounting plate (73) through a connecting plate (723). 3. A precision slider ball automatic assembly machine according to claim 2, characterized in that: the CNC single-axis displacement component (5) is provided with a single-axis motion platform (51) composed of a third guide rail assembly (511), a third ball screw (512) and a third servo motor drive assembly (513), and the single-axis motion platform (51) is provided with a fixture fixing plate (52); the assembly positioning fixture (8) includes a slider positioning base (81) and a slider positioning column (82) placed on the fixture fixing plate (52), and the slider body (100) is positioned by the slider positioning base (81) and the slider positioning column (82). 4. A precision slider ball automatic assembly machine according to claim 1 or 2, characterized in that: a gantry-type two-axis CNC motion platform (61) is provided in the slider end cover automatic locking component (6), and an automatic screw locking device (62) is provided on the two-axis CNC motion platform (61), and the automatic screw locking device (62) is connected to an external screw automatic feeding device. 5. The assembly method of the precision slider ball automatic assembly machine according to claim 3 is characterized by comprising the following steps: S1. Preparation for quantitative ball material collection: the ball supply and conveying components (32) are placed according to numbers, and balls of different precision sizes are placed in the barrels (321) corresponding to different numbers. According to the size data of the raceway in the slider body (100) obtained by detection before assembly, the automatic bead collection component (7) is driven by the CNC dual-axis automatic bead transport component (4) to move to the bottom of the corresponding bead drop mechanism plate (322), and the ball receiving tube (71) is aligned with the drop channel (3221); S2, loading the slider body (100): before the ball bearing assembly, the initial position of the numerically controlled single-axis displacement component (5) is in the ball bearing assembly area (200), the slider body (100) is placed on the assembly positioning fixture (8), and the assembly transition fixture (9) is placed on the slider body (100); S3, quantitative ball extraction: the lifting cylinder (77) lifts up the bead tube mounting plate (73), the horizontal cylinder (762) retracts, and the bead extracting lever (763) drives the movable slide plate (323) to move, so that the balls pass through the blanking channel (3221) and enter the ball receiving tube (71). When the ball receiving tube (71) is filled with balls, a set number of balls are obtained. The horizontal cylinder (762) and the lifting cylinder (77) are reset in sequence, and the movable slide plate (323) seals the blanking channel (3221) again. The CNC dual-axis automatic bead transport component (4) drives the automatic bead extracting component (7) to move from below the bead dropping mechanism plate (322) to the ball assembly area (200), and the lower end of the ball receiving tube (71) is aligned with the entrance of the ball guide channel (901) in the assembly transition fixture (9); S4, ball assembly: the blocking driving cylinder (722) in the movable blocking mechanism (72) drives the movable blocking plate (721) to move, and the balls in the ball receiving tube (71) fall into the rolling path of the slider body (100) through the ball guide channel (901) in the assembly transition fixture (9), and the assembly is completed after all the balls enter the slider body (100); S5, loading the slider end cover (101): removing the assembly transition fixture (9) placed on the slider body (100), and placing the slider end cover (101) on the slider body (100); S6, automatic locking of the end cover: the numerically controlled single-axis displacement component (5) drives the slider body (100) and the slider end cover (101) to move from an initial position to a position corresponding to the slider end cover automatic locking component (6), and the slider end cover automatic locking component (6) automatically delivers screws to lock the slider body (100) and the slider end cover (101) together; S7, finished product unloading: the CNC single-axis displacement component (5) drives the locked slider body (100) and the slider end cover (101) to return to the initial position, remove the finished product, and repeat the operation. 6. An assembly method for a precision slider ball automatic assembly machine according to claim 5, characterized in that: when the ball is assembled in step S4, a vibration device is added to the bottom of the assembly positioning fixture (8) or the fixture fixing plate (52) to apply a vibration force, so that the assembly transition fixture (9) and the slider body (100) vibrate following the assembly positioning fixture (8) during the ball blanking process. 7. An assembly method for a precision slider ball automatic assembly machine according to claim 5, characterized in that: before and after the ball assembly in step S4, lubricating oil is added to the raceway of the slider body (100) through the ball guide channel (901) in the assembly transition fixture (9); a removable automatic oiling device is provided on the upper part of the assembly transition fixture (9), and the automatic oiling device is connected to an external lubricating oil supply device through a oiling pipe.