A rolling linear guideway comprehensive performance automatic detection machine and its use method

Abstract

The present invention relates to an automatic testing machine for the comprehensive performance of a rolling linear guide pair and a method for using the same, wherein the testing machine includes a precision testing device, a friction testing device, a fixed-point quantitative force application device, etc. The precision testing device is composed of a marble testing table, a guide pair to be tested, a workbench, a roller rack transmission mechanism, a side detection mechanism, and a top surface detection mechanism; the friction testing device is composed of a supporting mechanism and a tension and pressure sensor; the fixed-point quantitative force application device is composed of a loading workbench, a roller rack transmission mechanism, a screw module, a torque motor, and a loading mechanism; the testing machine is reasonably designed, and automatic testing is achieved by driving the precision testing device and the fixed-point quantitative force application device through the workbench and the roller rack, thereby improving testing efficiency and precision; and automatic testing of the comprehensive performance of different types of linear guides is achieved by setting a plurality of adjustment mechanisms. The testing machine system is suitable for large-scale automatic testing of the comprehensive performance of various types of rolling linear guides.

Description

Technical Field

[0001] The present invention relates to comprehensive performance detection of linear guide rail pairs, in particular to automated comprehensive performance detection of large quantities of guide rails of different models. Technical Background

[0002] With the rapid development of CNC technology in recent years, the requirements for linear guide pairs have become increasingly stringent. Rolling linear guide pairs with excellent performance have gradually received attention, and their performance has an important impact on the overall performance of machine tools. As high-end and advanced CNC machine tools, they require high-performance and high-precision components to ensure their motion accuracy. The motion accuracy of precision components such as CNC machine tools and machining centers is restricted by the motion accuracy and friction of the guide pairs. Therefore, it is particularly important to conduct precision tests on the guide pairs to judge and evaluate the motion accuracy level.

[0003] Advanced testing technology is the guarantee of high-quality products. At present, most domestic guide rail manufacturers use manual testing as their testing method, which has low testing efficiency and large manual errors. It is impossible to achieve large-scale and high-precision automated testing of linear guide rails, which has become a difficult problem for improving the quality of my country's guide rails. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides a technical solution and equipment for automatic detection of the comprehensive performance of rolling linear guide pairs, and designs an automatic detection machine for the comprehensive performance of rolling linear guide pairs and its working method. The detection machine can solve the current problems of low manual efficiency in rolling linear guide pair detection, large manual errors caused by workers' fatigue after long-term detection, and single detection items.

[0005] The automatic testing machine for comprehensive performance of rolling linear guide rail pairs of the present invention is characterized in that it includes an accuracy testing device, a friction testing device and a fixed-point quantitative force application device; the accuracy testing device and the friction testing device detect the guide rail pair to be tested to obtain the form and position tolerance, motion accuracy and no-load friction value of the guide rail pair to be tested, and after applying an offset force through the fixed-point quantitative force application device, the form and position tolerance and motion accuracy of the guide rail pair to be tested are detected.

[0006] The main controller is used to realize the automatic coordinated operation of the whole system and realize automatic detection. By setting multiple groups of bolt holes with different apertures and multiple sensor adjustment mechanisms on the marble testing table, the comprehensive performance detection of different types of guide rail pairs can be realized. The screw module and the loading screw are used to apply different eccentric loads to the slider to be tested. At the same time, multiple indicators of the guide rail pair can be detected, which improves the detection efficiency, realizes the automatic detection of large quantities of guide rail pairs, reduces the labor intensity of workers, and improves the quality of the guide rails.

[0007] Furthermore, the precision detection device includes a marble detection table, a guide rail pair to be tested, a detection workbench, a roller rack transmission mechanism, a side detection mechanism, and a top surface detection mechanism; the marble detection table is fixed on the bed, the cross-section of the marble detection table is a trapezoidal structure and a plurality of rows of bolt holes of different diameters are provided on the upper surface, and the bolt holes correspond to the installation of guide rail pairs of different models; the guide rail pair to be tested includes a linear guide rail and a slider to be tested, and the guide rail pair to be tested is fixed to the marble detection table by bolts; the detection workbench is a square structure, with square grooves at the four corners of the upper surface, countersunk holes are provided in the grooves, and four first sliders are provided below the square grooves of the detection workbench, the detection workbench is installed on the first linear guide rail through the first slider, the first linear guide rail is installed on the guide rail frame of the bed, and limit switches are installed at both ends of the first linear guide rail, and the limit switches ensure the safe operation of the detection workbench; a circular hole is provided on the upper surface of the detection workbench, and a square groove is opened on the lower surface corresponding to the circular hole for installing the roller rack transmission mechanism;

[0008] The roller rack transmission mechanism includes a first servo motor, a first reducer, a roller and a first rack; the first servo motor and the first reducer are installed on a motor seat, the motor seat is arranged on the upper surface of the detection workbench, the roller shaft of the roller is connected to the reducer through a coupling, the roller shaft is installed in the detection workbench through a bearing assembly, the rack is installed on the bed guide rail frame, the rack is arranged on the bed parallel to the detection workbench guide rail, and the first servo motor is controlled by the main controller to move linearly along the rack and guide rail.

[0009] Furthermore, the side detection mechanism includes a detection mechanism mounting bracket, a first sensor adjustment mechanism, a second sensor adjustment mechanism and a connecting plate. The detection mechanism mounting bracket 11 is fixed on the detection workbench. The first sensor adjustment mechanism consists of an adjustment base, a small guide rail, a small slider, a small rack, an adjustment gear, an adjustment shaft and an adjustment mechanism housing; the adjustment base of the first sensor adjustment mechanism is mounted on the triangular bracket, the triangular bracket is mounted on the connecting plate, and the connecting plate is mounted on the detection mechanism mounting bracket; the adjustment base is provided with a guide rail frame, the small guide rail is mounted on the guide rail frame, the adjustment mechanism housing is a stepped design, the small slider is mounted on the right half, and the small rack is mounted on the left half. A first laser displacement sensor is mounted on the adjustment mechanism housing, the adjustment mechanism housing is connected to the small guide rail through the small slider, the adjustment gear is mounted on the adjustment shaft, the adjustment shaft is a stepped design, and the adjustment shaft is mounted on the adjustment base through a bearing assembly, and grooves are opened on the left and right sides of the adjustment mechanism housing, and both ends of the adjustment shaft are mounted in the grooves. Rotating the large end of the adjustment shaft drives the adjustment gear to rotate, and the engagement of the adjustment gear and the small rack drives the adjustment mechanism housing to move linearly along the small guide rail, thereby adjusting the distance between the first laser displacement sensor and the guide rail pair to be measured;

[0010] The second sensor adjustment mechanism includes two first sensor adjustment mechanisms, namely the first sensor adjustment mechanism and the second sensor adjustment mechanism, a sensor connecting plate, a small triangular bracket, a second laser displacement sensor, and a third laser displacement sensor; the first sensor adjustment mechanism is vertically installed on the connecting plate through the adjustment mechanism housing, the second sensor adjustment mechanism is installed on the adjustment mechanism housing of the first sensor adjustment mechanism through the small triangular bracket, the second sensor adjustment mechanism is horizontally arranged, the second laser displacement sensor and the third laser displacement sensor are horizontally installed on the second sensor adjustment mechanism through the sensor connecting plate, and the distance between the laser displacement sensor and the guide rail pair to be measured on the Z axis and Y axis can be adjusted by rotating the adjustment shaft respectively.

[0011] Furthermore, the top surface detection mechanism includes a large adjustment mechanism, a sensor adjustment mechanism, a sensor carrying mechanism, and several laser displacement sensors; the large adjustment mechanism is composed of a large adjustment base, a small guide rail, a small slider, a small rack, an adjustment gear, a large adjustment shaft, and a large adjustment mechanism housing. Its structure is similar to that of the first sensor adjustment mechanism. The large adjustment mechanism is horizontally installed on the top of the detection mechanism mounting bracket; the sensor adjustment mechanism is vertically installed on the large adjustment mechanism housing through a large triangular bracket; the sensor carrying mechanism is composed of a carrying platform and several sensor mounting plates. The sensor carrying platform and the sensor mounting plate are both sheet metal parts. The sensor carrying platform is installed on the sensor adjustment mechanism housing. One end of the sensor mounting plate is fixed on the sensor carrying platform, and the other end is installed with a laser displacement sensor group; rotating the large adjustment mechanism adjustment shaft can make the large adjustment mechanism housing move linearly along the guide rail to adjust the distance of the laser displacement sensor group on the Y axis. Rotating the sensor adjustment mechanism adjustment shaft causes the housing to move along the guide rail on the Z axis to adjust the distance between the laser displacement sensor group and the guide rail to be measured on the Z axis.

[0012] Furthermore, the friction force detection device includes two supporting mechanisms and two tension and pressure sensors. A supporting mechanism and a tension and pressure sensor form a group and are symmetrically arranged on the front and rear sides of the guide rail slider to be tested. The supporting mechanism consists of a base, a connecting rod, a mounting rod, and an adjusting bolt; the base is installed on the detection workbench, and the base and the mounting rod are connected by a connecting rod. The position of the tension and pressure sensor on the slider can be adjusted by adjusting the connecting bolts between the connecting rod and the base; the tension and pressure sensor is installed on one end of the mounting rod to fit the sub-slider of the guide rail to be tested; when the detection workbench moves, the sub-slider of the guide rail to be tested is pushed to move linearly along the guide rail to be tested through the mounting rod and the tension and pressure sensor, and the friction force of the slider in the no-load state is obtained at the same time.

[0013] Furthermore, the fixed-point and quantitative force-applying device includes a loading workbench, a roller rack transmission mechanism, a screw module, a torque motor and a loading mechanism; the loading workbench is a square structure, with square grooves at the four corners of its upper surface, countersunk holes in the grooves, and a slider under the square groove of the detection workbench. The detection workbench is installed on a linear guide rail through four third sliders, and the linear guide rail is installed on the guide rail frame of the bed. Limit switches are installed at both ends of the linear guide rail to ensure the safe operation of the loading workbench.

[0014] Furthermore, the roller rack transmission mechanism 2 includes a second servo motor, a third reducer, a roller and a second rack; the second servo motor and the third reducer are installed on the motor seat, the motor seat is arranged on the upper surface of the loading workbench, the roller shaft of the roller is connected to the reducer through a coupling, the roller shaft is installed in the loading workbench through a bearing assembly, the rack is installed on the bed guide rail frame, the rack and the detection workbench guide rail are arranged parallel to the bed, the servo motor is controlled by the main controller to move linearly along the rack and guide rail, and the loading workbench is provided with a loading bracket for installing a screw module; the screw module includes a loading screw base, a screw workbench, and a torque motor; the base is installed with two linear guides, a loading screw and its mounting accessories, the base is vertically installed on the loading bracket, the screw slider consists of a workbench and 4 sliders, the workbench is connected to the screw through a connecting component, and is installed on the linear guide of the base through 4 second sliders, the torque motor is connected to the second reducer and then connected to the loading screw through a coupling.

[0015] The further loading mechanism includes a loading platform, a convex loading block, an adjusting screw 66, a third slider and a pressure sensor; the loading platform is vertically installed on the screw module workbench, a square through groove is opened in the middle of the loading platform, the screw and its mounting accessories are installed in the square groove of the loading platform, and the guide rail pair is installed at the bottom of the loading platform; the upper end of the convex loading block is connected to the screw, and the lower end is installed at the bottom of the loading platform through the slider; the pressure sensor is installed at the bottom of the convex loading block, and the convex loading block can be driven to move on the Y axis through the guide rail pair and the adjusting screw, and the movement of the loading mechanism on the Z axis is adjusted by the above-mentioned screw module, and the loading device is moved on the X axis by the loading workbench along the linear movement of the bed, thereby realizing the application of each eccentric load force of the guide rail pair to be tested. After different eccentric loads are applied to the slider to be tested, the precision detection device again detects the form and position tolerance and motion accuracy of the guide rail pair to be tested under the eccentric load state.

[0016] The guide rail pair and the screw can drive the convex loading block to move on the Y-axis, the screw module can be used to adjust the movement of the loading mechanism on the Z-axis, and the loading table can be used to move the loading device on the X-axis along the linear motion of the bed, thereby realizing the application of the eccentric load of the guide rail pair to be tested. After the eccentric load is applied, the detection table and the loading table move linearly along the guide rail at the same speed. After each sensor collects data and uploads it to the host computer, the form and position tolerance of the guide rail pair to be tested, the motion accuracy and the no-load friction of the slider are obtained. At this point, the comprehensive performance test of the guide rail pair is completed, and the detection table and the loading table return to the origin to wait for the next guide rail pair to be tested.

[0017] Compared with the prior art, the present invention has achieved the following beneficial effects:

[0018] 1. The present invention provides an automatic testing machine for the comprehensive performance of rolling linear guide rails. After different models of guide rails to be tested are installed in corresponding positions on a marble testing table, the guide rails are automatically tested for form and position tolerance, motion accuracy, and no-load friction by a precision testing device and a friction testing device. After the first step is completed, a fixed-point and quantitative force application device applies an eccentric load to the slider to be tested, and the precision testing device automatically tests the comprehensive performance of the guide rail pair to be tested. The testing process is fully automated, which reduces the labor intensity of the operator and reduces the number of employees and labor costs of the enterprise.

[0019] 2. The friction force detection device is designed as a three-stage structure. By adjusting the bolts connecting the base and the sensor mounting post, the tension and pressure sensors are precisely aligned with the slider under test. When testing the unloaded slider's friction, thrust is provided to the slider, enabling it to advance at a constant speed along the test table. The friction force detection devices are symmetrically positioned at the front and rear ends of the slider under test, allowing the slider to move back and forth on the guide rail. This design eliminates the need for traditional complex tooling, resulting in a simple structure, easy adjustment, and improved testing efficiency.

[0020] 3. The precision detection device is equipped with 7 laser displacement sensors. Every combination of two sensors can detect one detection index. The comprehensive performance detection of the form and position tolerance and motion accuracy of the rolling linear guide pair is realized on one device, avoiding the errors caused by multiple detections and improving the detection accuracy and efficiency.

[0021] 4. The precision detection device is equipped with multiple sensor adjustment mechanisms. All sensors can move on the X, Y, and Z axes. When detecting different models, the sensor calibration can be achieved by simply rotating the adjustment shaft of the adjustment mechanism. This allows one device to detect multiple types of linear guides, saving equipment costs and improving economic benefits.

[0022] 5. The torque motor and lead screw module of the fixed-point, quantitative force-applying device work together to provide a stable load. Two sets of lead screws are provided: one for adjusting the loading mechanism's Z-axis motion and the other for adjusting the loading mechanism's Y-axis motion. This allows for the application of varying offset loads to different guideway models, thereby testing the guideway's overall performance under varying offset loads and improving its quality. The loading mechanism features a convex loading block, connected to the slider at both ends. This ensures contact area along the lead screw's motion, enhancing the loading mechanism's rigidity.

[0023] 6. The transmission mechanism of the detection action table and the loading workbench is a servo motor and a roller rack mechanism, which has higher positioning accuracy and higher reciprocating motion efficiency. The bottom of the workbench is connected to the linear guide through 4 sliders to ensure stable movement and improve detection efficiency and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a front view of the accuracy detection device and the friction detection device of the present invention;

[0027] Figure 3 It is a left view of the precision detection device and the friction detection device of the present invention;

[0028] Figure 4 This is a front view of the fixed-point quantitative force application device of the present invention;

[0029] Figure 5 A top view of the fixed-point quantitative force application device of the present invention;

[0030] Figure 6 yes Figure 2 A partial view of section A1;

[0031] Figure 7 yes Figure 2 A partial view of section A2;

[0032] Figure 8 yes Figure 4 A3 partial view of the

[0033] Among them, 1-bed, 2-first linear guide, 3-limit switch, 4-first rack, 5-guide pair to be tested, 6-marble detection table, 7-second rack, 8-second linear guide, 9-first slider, 10-detection workbench, 11-detection mechanism mounting bracket, 12-adjustment base, 13-adjustment shaft, 14-bearing assembly, 15-adjustment gear, 16-small rack, 17-adjustment mechanism housing, 18-small slider, 19-small guide, 20-first sensor adjustment mechanism, 21-second laser displacement sensor, 22-sensor connecting plate, 23-third laser displacement sensor, 24-tension and pressure sensor, 25-mounting rod, 26-connecting plate, 27-first laser displacement sensor, 28-roller, 29-roller shaft, 30-plum blossom coupling, 31-first reducer, 32-first servo motor, 33-large adjustment mechanism base , 34-large adjustment shaft, 35-large adjustment mechanism housing, 36-large triangular bracket, 37-sensor adjustment mechanism, 38-carrying platform, 39-sensor mounting plate, 40-laser displacement sensor group, 41-second sensor adjustment mechanism, 42-small triangular bracket, 43-adjusting bolt, 44-connecting rod, 45-base, 46-triangular bracket, 47-second slider, 48-loading workbench, 49-pressure sensor, 50-guide rail, 51-convex loading block, 52-third slider, 53-loading platform, 54-screw workbench, 55-fourth slider, 56-loading screw, 57-coupling, 58-torque motor, 59-second reducer, 60-loading bracket, 61-second servo motor 2, 62-third reducer, 63-coupling, 64-bearings and accessories, 65-roller, 66-adjusting screw, 67-loading screw base. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] The present invention provides an automatic testing machine for the comprehensive performance of rolling linear guide rails, which can realize automatic testing of the form and position tolerances, motion accuracy and no-load friction of rolling linear guide rail pairs of different models, as well as the form and position tolerances and motion accuracy of rolling linear guide rail pairs after the tested slider is subjected to different offset loads, thereby improving the guide rail testing efficiency and accuracy, helping enterprises to realize large-scale testing of rolling linear guide rail pairs of different models, reducing the operator's workload and reducing the enterprise's labor costs.

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] like Figure 1 As shown, the present invention provides an automatic testing machine for the comprehensive performance of rolling linear guide rails, which includes a precision testing device, a friction testing device, and a fixed-point quantitative force application device; the guide rail pair to be tested selects a corresponding fixed position on the marble testing table, and the precision testing device and the friction testing device detect the guide rail pair to be tested under the drive of the testing workbench and obtain the form and position tolerance, motion accuracy and no-load friction value of the guide rail pair. After the biasing force is applied by the fixed-point quantitative force application device, the form and position tolerance and motion accuracy of the guide rail pair to be tested are detected. According to different types of guide rails, corresponding fixed positions can be selected on the marble workbench, and all sensors can move along the X, Y, and Z axes under the drive of the workbench and the adjustment mechanism to adapt to the detection requirements of different types of guide rails.

[0038] like Figure 1 、 2 As shown, the precision detection device includes a marble detection table 6, a guide rail pair to be tested 5, a detection workbench 10, a roller rack transmission mechanism, a side detection mechanism, and a top surface detection mechanism; the marble detection table 6 is fixed on the bed 1, the cross-section of the marble detection table is a trapezoidal structure and the upper surface is provided with multiple rows of bolt holes of different diameters, and these bolt holes correspond to the installation of different types of guide rail pairs; the guide rail pair to be tested includes a linear guide rail and a slider to be tested, and the guide rail pair to be tested is fixed to the marble detection table by bolts.

[0039] like Figure 2 As shown, the detection workbench 10 of the present invention is a square structure, with square grooves on the four corners of the upper surface, countersunk holes in the grooves, and four first sliders are provided below the square grooves of the detection workbench. The detection workbench 10 is installed on the first linear guide rail 2 through the first slider, and the first linear guide rail 2 is installed on the guide rail frame of the bed 1. Limit switches 3 are installed at both ends of the linear guide rail. The limit switches 3 ensure the safe operation of the detection workbench. A circular hole is provided on the upper surface of the detection workbench, and the circular hole corresponds to the square groove on the lower surface for installing the roller rack transmission mechanism.

[0040] The roller rack transmission mechanism includes a first servo motor 32, a first reducer 31, a roller 28 and a first rack 4; the first servo motor 32 and the first reducer 31 are installed on a motor base, and the motor base is arranged on the upper surface of the detection workbench 10. The roller shaft 29 of the roller 28 is connected to the reducer 31 through a coupling 30, and the roller shaft 29 is installed in the detection workbench through a bearing assembly. The rack 4 is installed on the bed guide rail frame, and the rack is arranged on the bed parallel to the detection workbench guide rail. The first servo motor 32 is controlled by the main controller to move linearly along the rack and guide rail.

[0041] The side detection mechanism includes a detection mechanism mounting bracket 11, a first sensor adjustment mechanism 20, a second sensor adjustment mechanism 41 and a connecting plate 26. The detection mechanism mounting bracket 11 is fixed on the detection workbench 10. The first sensor adjustment mechanism is composed of an adjustment base 12, a small guide rail 19, a small slider 18, a small rack 16, an adjustment gear 15, an adjustment shaft 13 and an adjustment mechanism housing 17; the adjustment base 12 of the first sensor adjustment mechanism is mounted on a triangular bracket 46, the triangular bracket 46 is mounted on the connecting plate 26, and the connecting plate 26 is mounted on the detection mechanism mounting bracket 11; the adjustment base 12 is provided with a guide rail frame, the small guide rail 19 is mounted on the guide rail frame, the adjustment mechanism housing 17 is a stepped design, and the small The slider 18 is installed in the right half, the small rack 16 is installed in the left half, and the first laser displacement sensor 27 is installed on the adjustment mechanism housing 17. The adjustment mechanism housing 17 is connected to the small guide rail 19 through the small slider 18. The adjustment gear 15 is installed on the adjustment shaft 13. The adjustment shaft 13 is a stepped design, and the adjustment shaft is installed on the adjustment base 12 through the bearing assembly 14. Slots are opened on the left and right sides of the adjustment mechanism housing 17, and the two ends of the adjustment shaft are installed in the slots. Rotating the large end of the adjustment shaft 13 drives the adjustment gear 15 to rotate, and the engagement of the adjustment gear 15 with the small rack 16 drives the adjustment mechanism housing 17 to move linearly along the small guide rail 19, thereby adjusting the distance between the first laser displacement sensor and the guide rail pair to be measured;

[0042] The second sensor adjustment mechanism 41 includes two first sensor adjustment mechanisms (a first sensor adjustment mechanism and a second sensor adjustment mechanism), a sensor connecting plate 22, a small triangular bracket 42, a second laser displacement sensor, and a third laser displacement sensor; the first sensor adjustment mechanism is vertically installed on the connecting plate 22 through the adjustment mechanism housing, the second sensor adjustment mechanism is installed on the adjustment mechanism housing of the first sensor adjustment mechanism through the small triangular bracket 42, the second sensor adjustment mechanism is horizontally arranged, and the second laser displacement sensor and the third laser displacement sensor are horizontally installed on the second sensor adjustment mechanism through the sensor connecting plate. The distance between the laser displacement sensor and the guide rail pair to be measured on the Z axis and Y axis can be adjusted by rotating the adjustment axis respectively.

[0043] like Figure 3As shown, the top surface detection mechanism of the present invention includes a large adjustment mechanism, a sensor adjustment mechanism 37, a sensor carrying mechanism, and several laser displacement sensors; the large adjustment mechanism is composed of a large adjustment base 33, a small guide rail, a small slider, a small rack, an adjustment gear, a large adjustment shaft 34, and a large adjustment mechanism housing 35. Its structure is similar to that of the first sensor adjustment mechanism. The large adjustment mechanism is horizontally installed on the top of the detection mechanism mounting bracket; the sensor adjustment mechanism 37 is vertically installed on the large adjustment mechanism housing through a large triangular bracket 36; the sensor carrying mechanism is composed of a carrying platform 38 and several sensor mounting plates 39 The sensor mounting platform and sensor mounting plate are both sheet metal parts. The sensor mounting platform is mounted on the housing of the sensor adjustment mechanism 37. One end of the sensor mounting plate is fixed to the sensor mounting platform, and the other end is mounted with a laser displacement sensor group 40 (having the fourth to seventh laser displacement sensors). Rotating the adjustment shaft of the large adjustment mechanism can cause the large adjustment mechanism housing to move linearly along the guide rail, thereby adjusting the distance of the laser displacement sensor group 40 on the Y axis. Rotating the adjustment shaft of the sensor adjustment mechanism 37 causes the housing to move along the guide rail on the Z axis, thereby adjusting the distance between the laser displacement sensor group 40 and the guide rail to be measured on the Z axis.

[0044] The friction force detection device includes two supporting mechanisms and two tension and pressure sensors 24. A supporting mechanism and a tension and pressure sensor form a group and are symmetrically arranged on the front and rear sides of the guide rail slider to be tested. The supporting mechanism consists of a base 45, a connecting rod 44, a mounting rod 25, and an adjusting bolt 43. The base 45 is installed on the detection workbench. The base 45 and the mounting rod 25 are connected by a connecting rod 44. The position of the tension and pressure sensor on the slider can be adjusted by adjusting the connecting bolts of the connecting rod 44 and the base 45. The tension and pressure sensor is installed on the mounting rod at one end and fits the guide rail sub-slider to be tested. When the detection workbench moves, the mounting rod and the tension and pressure sensor push the guide rail sub-slider to be tested to move linearly along the guide rail to be tested, and at the same time, the friction force of the slider in the unloaded state is obtained.

[0045] like Figure 4 As shown, the fixed-point and quantitative force-applying device includes a loading workbench 48, a roller rack transmission mechanism 2, a screw module, a torque motor 58 and a loading mechanism; the loading workbench 48 is a square structure, and square grooves are opened at the four corners of its upper surface, and countersunk holes are provided in the grooves. A slider is provided under the square groove of the detection workbench, and the detection workbench is installed on the linear guide rail 8 through four third sliders 52. The linear guide rail is installed on the guide rail frame of the bed, and limit switches are installed at both ends of the linear guide rail to ensure the safe operation of the loading workbench; a circular hole is provided on the upper surface of the loading workbench, and a square groove is opened from the lower surface corresponding to the circular hole to install the roller rack transmission mechanism 2.

[0046] The roller rack transmission mechanism 2 includes a second servo motor 61, a third reducer 62, a roller 65 and a second rack 7; the second servo motor and the third reducer are installed on the motor seat, the motor seat is arranged on the upper surface of the loading workbench, the roller shaft of the roller is connected to the reducer through a coupling 30, the roller shaft is installed in the loading workbench through a bearing assembly 64, the rack is installed on the bed guide rail frame, the rack and the detection workbench guide rail are arranged parallel to the bed, the servo motor is controlled by the main controller to move linearly along the rack and guide rail, the loading workbench is provided with a loading bracket for installing a screw module; the screw module includes a loading screw base 67, a screw table 54, and a torque motor; the base is equipped with two linear guides, a loading screw 56 and its mounting accessories, the base is vertically installed on the loading bracket 60, the screw slider consists of a workbench and 4 sliders, the workbench is connected to the screw through a connecting component, and is installed on the linear guide 50 of the base through 4 second sliders 47, the torque motor The machine is connected to the second reducer 59 and then to the loading screw through the coupling 57. The loading mechanism includes a loading platform 48, a convex loading block 51, an adjusting screw 66, a third slider 52 and a pressure sensor 42; the loading platform is vertically installed on the screw module workbench, and a square through groove is opened in the middle of the loading platform. The screw and its mounting accessories are installed in the square groove of the loading platform, and the guide rail pair is installed at the bottom of the loading platform; the upper end of the convex loading block is connected to the screw, and the lower end is installed at the bottom of the loading platform through the slider; the pressure sensor is installed at the bottom of the convex loading block, and the convex loading block can be driven to move on the Y axis through the guide rail pair and the adjusting screw. The movement of the loading mechanism on the Z axis is adjusted by the above-mentioned screw module, and the loading device is moved on the X axis by the loading workbench moving linearly along the bed, thereby realizing the application of each eccentric load force of the guide rail pair to be tested. After applying different eccentric loads to the slider to be tested, the precision detection device again detects the form and position tolerance and motion accuracy of the guide rail pair to be tested under the eccentric load state.

[0047] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. An automatic testing machine for the comprehensive performance of a rolling linear guide pair, characterized by: It includes an accuracy detection device, a friction force detection device and a fixed-point and quantitative force application device; The precision detection device and the friction detection device detect the guide rail pair to be tested to obtain the form and position tolerance, motion accuracy and no-load friction value of the guide rail pair to be tested. After applying the eccentric load force through the fixed-point quantitative force application device, the form and position tolerance and motion accuracy of the guide rail pair to be tested are tested again. The precision detection device includes a marble detection table (6), a guide rail pair to be tested (5), a detection workbench (10), a roller rack transmission mechanism, a side detection mechanism, and a top surface detection mechanism; the marble detection table (6) is fixed on the bed (1), the cross section of the marble detection table is a trapezoidal structure and a plurality of rows of bolt holes of different diameters are arranged on the upper surface, and the bolt holes correspond to the installation of guide rail pairs of different models; the guide rail pair to be tested includes a linear guide rail and a slider to be tested, and the guide rail pair to be tested is fixed to the marble detection table by bolts; The detection workbench (10) is a square structure, with square grooves at the four corners of the upper surface, and countersunk holes are provided in the grooves. Four first sliders are provided below the square grooves of the detection workbench. The detection workbench (10) is mounted on the first linear guide rail (2) through the first slider. The first linear guide rail (2) is mounted on the guide rail frame of the bed (1). Limit switches (3) are installed at both ends of the first linear guide rail. The limit switches (3) ensure the safe operation of the detection workbench. The side detection mechanism includes a detection mechanism mounting bracket (11), a first sensor adjustment mechanism, a second sensor adjustment mechanism and a connecting plate (26). The detection mechanism mounting bracket (11) is fixed on the detection workbench (10). The first sensor adjustment mechanism consists of an adjustment base (12), a small guide rail (19), a small slider (18), a small rack (16), an adjustment gear (15), an adjustment shaft (13) and an adjustment mechanism housing (17). The adjustment base (12) of the first sensor adjustment mechanism is mounted on a triangular bracket (46), and the triangular bracket (46) is mounted on the connecting plate (26). The connecting plate (26) is mounted on the detection mechanism mounting bracket (11); the adjustment base (12) is provided with a guide rail frame, the small guide rail (19) is mounted on the guide rail frame, the adjustment mechanism housing (17) is a step design, the small slider (18) is mounted on the right half, the small rack (16) is mounted on the left half, the adjustment mechanism housing (17) is mounted with a first laser displacement sensor (27), the adjustment mechanism housing (17) is connected to the small guide rail (19) through the small slider (18), and the adjustment gear (15) is mounted on the adjustment mechanism housing (17). On the joint shaft (13), the adjustment shaft (13) is a stepped design, and the adjustment shaft is installed on the adjustment base (12) through the bearing assembly (14). The left and right sides of the adjustment mechanism housing (17) are provided with grooves, and both ends of the adjustment shaft are installed in the grooves. The large end of the adjustment shaft (13) is rotated to drive the adjustment gear (15) to rotate, and the adjustment mechanism housing (17) is driven to move linearly along the small guide rail (19) through the engagement of the adjustment gear (15) and the small rack (16), thereby adjusting the distance between the first laser displacement sensor and the guide rail pair to be measured.

2. The automatic testing machine for comprehensive performance of rolling linear guide rails according to claim 1, characterized in that: The roller rack transmission mechanism includes a first servo motor (32), a first reducer (31), a roller (28) and a first rack (4); the first servo motor (32) and the first reducer (31) are installed on a motor base, the motor base is arranged on the upper surface of the detection workbench (10), the roller shaft (29) of the roller (28) is connected to the first reducer (31) through a coupling (30), the roller shaft (29) is installed in the detection workbench through a bearing assembly, the first rack (4) is installed on the bed guide rail frame, the first rack is arranged on the bed in parallel with the detection workbench guide rail, and the first servo motor (32) is controlled by a main controller to move linearly along the first rack and the guide rail.

3. The automatic testing machine for comprehensive performance of rolling linear guide rails according to claim 2, characterized in that: The second sensor adjustment mechanism (41) includes a first sensor adjustment mechanism, a second sensor adjustment mechanism, a sensor connecting plate (22), a small triangular bracket (42), a second laser displacement sensor, and a third laser displacement sensor, wherein the first sensor adjustment mechanism is vertically mounted on the connecting plate (22) through an adjustment mechanism housing, the second sensor adjustment mechanism is mounted on the adjustment mechanism housing of the first sensor adjustment mechanism through a small triangular bracket (42), the second sensor adjustment mechanism is arranged horizontally, the second laser displacement sensor and the third laser displacement sensor are horizontally mounted on the second sensor adjustment mechanism through the sensor connecting plate, and the adjustment shafts are respectively rotated to adjust the distance between the laser displacement sensor and the guide rail pair to be measured on the Z axis and the Y axis; the top surface detection mechanism includes a large adjustment mechanism, a sensor adjustment mechanism (37), a sensor carrying mechanism, and a plurality of laser displacement sensors; the large adjustment mechanism is composed of a large adjustment base (33) , a small guide rail, a small slider, a small rack, an adjustment gear, a large adjustment shaft (34), and a large adjustment mechanism housing (35), wherein the large adjustment mechanism is horizontally mounted on the top of the detection mechanism mounting bracket; the sensor adjustment mechanism (37) is vertically mounted on the large adjustment mechanism housing through a large triangular bracket (36); the sensor carrying mechanism is composed of a carrying platform (38) and a plurality of sensor mounting plates (39), wherein the sensor carrying platform and the sensor mounting plates are both sheet metal parts, the sensor carrying platform is mounted on the sensor adjustment mechanism (37) housing, one end of the sensor mounting plate is fixed on the sensor carrying platform, and the other end is mounted with a laser displacement sensor group (40); the large adjustment mechanism adjustment shaft is rotated to make the large adjustment mechanism housing move linearly along the guide rail, thereby adjusting the distance of the laser displacement sensor group (40) on the Y axis, and the adjustment shaft of the sensor adjustment mechanism (37) is rotated to make the housing move along the guide rail on the Z axis, thereby adjusting the distance of the laser displacement sensor group (40) on the Z axis and the guide rail to be measured.

4. The automatic testing machine for comprehensive performance of rolling linear guide rails according to claim 1, characterized in that: The friction force detection device comprises two supporting mechanisms and two tension and pressure sensors (24), wherein one supporting mechanism and one tension and pressure sensor form a group and are symmetrically arranged on the front and rear sides of the guide rail slider to be tested, and the supporting mechanism comprises a base (45), a connecting rod (44), a mounting rod (25), and an adjusting bolt (43); the base (45) is mounted on a detection workbench, the base (45) and the mounting rod (25) are connected via a connecting rod (44), and the position of the tension and pressure sensor on the slider is adjusted by adjusting the connecting bolts between the connecting rod (44) and the base (45); the tension and pressure sensor is mounted on one end of the mounting rod and is in contact with the guide rail auxiliary slider to be tested; when the detection workbench moves, the guide rail auxiliary slider to be tested is pushed to move linearly along the guide rail to be tested through the mounting rod and the tension and pressure sensor, and the friction force of the slider in an unloaded state is obtained at the same time.

5. The automatic testing machine for comprehensive performance of rolling linear guide rails according to claim 1, characterized in that: The fixed-point quantitative force application device includes a loading workbench (48), a roller rack transmission mechanism, a screw module, a torque motor (58) and a loading mechanism; the loading workbench (48) is a square structure, and square grooves are opened at the four corners of its upper surface, and countersunk holes are provided in the grooves. A slider is provided below the square groove of the detection workbench, and the detection workbench is installed on a linear guide rail (8) through four third sliders (52). The linear guide rail is installed on the guide rail frame of the bed, and limit switches are installed at both ends of the linear guide rail to ensure the safe operation of the loading workbench.

6. The automatic testing machine for comprehensive performance of rolling linear guide rails according to claim 5, characterized in that: The roller rack transmission mechanism includes a second servo motor (61), a third reducer (62), a roller (65) and a second rack (7); the second servo motor and the third reducer are mounted on a motor base, the motor base is located on the upper surface of the loading workbench, the roller shaft of the roller is connected to the reducer through a coupling (30), the roller shaft is installed in the loading workbench through a bearing assembly (64), the rack is installed on the bed guide rail frame, the rack and the detection workbench guide rail are arranged on the bed in parallel, the servo motor is controlled by the main controller to move linearly along the rack and the guide rail, the loading workbench is arranged A loading bracket is provided for mounting a screw module; the screw module comprises a loading screw base (67), a screw workbench (54), and a torque motor; the base is provided with two linear guide rails, a loading screw (56) and its mounting accessories, the base is vertically mounted on the loading bracket (60), the screw slider consists of a workbench and four sliders, the workbench is connected to the screw through a connecting component, and is mounted on the linear guide rail (50) of the base through four second sliders (47), the torque motor is connected to the second reducer (59) and then connected to the loading screw through a coupling (57).

7. The automatic testing machine for comprehensive performance of rolling linear guide rails according to claim 6, characterized in that: The loading mechanism includes a loading workbench (48), a convex loading block (51), an adjusting screw (66), a third slider (52) and a pressure sensor (49); the loading platform is vertically mounted on the screw module workbench, a square through slot is opened in the middle of the loading platform, the screw and its mounting accessories are mounted in the square slot of the loading platform, and the guide rail pair is mounted at the bottom of the loading platform; the upper end of the convex loading block is connected to the screw, and the lower end is mounted at the bottom of the loading platform through the slider; the pressure sensor is mounted at the bottom of the convex loading block, and the convex loading block is driven to move on the Y axis through the guide rail pair and the adjusting screw, and the movement of the loading mechanism on the Z axis is adjusted through the above-mentioned screw module, and the loading device is moved on the X axis through the linear movement of the loading workbench along the bed, thereby realizing the application of each bias load of the guide rail pair to be tested. After different bias loads are applied to the slider to be tested, the accuracy detection device again detects the form and position tolerance and motion accuracy of the guide rail pair to be tested under the bias load state.

8. A method for using the automatic testing machine for comprehensive performance of a linear rolling guide pair according to any one of claims 1 to 7, characterized in that: After different models of guide rails to be tested are installed in corresponding positions on the marble testing table, the precision testing device and friction testing device will automatically test the form and position tolerance, motion accuracy and no-load friction of the guide rail pair to be tested. After the first step is completed, the fixed-point quantitative force application device will apply an eccentric load to the slider to be tested, and the precision testing device will automatically test the comprehensive performance of the guide rail pair to be tested.

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