Rolling linear guide rail pair precision retentivity and reliability test bed and working method

Abstract

The invention belongs to the technical field of rolling linear guide rail pair tests. The rolling linear guide rail pair precision retentivity and reliability test bench comprises a lathe bed assembly, a loading support, a driving assembly, a loading assembly and a measuring assembly, the lathe bed assembly comprises a lathe bed, a to-be-tested guide rail pair and a tool plate, the tool plate is fixed to the lathe bed, and the to-be-tested guide rail pair is installed on the tool plate; the driving assembly and the loading assembly are respectively connected with the loading bracket, the driving assembly is used for driving the loading bracket and the loading assembly to move, and the measuring assembly is mounted at the lower part of the loading assembly; the device is simple in overall structure and high in detection efficiency, loading under different stress conditions can be accurately simulated, two rolling linear guide rail pairs can be tested at the same time, and the requirements of product performance comparison tests under the completely same working conditions are met.

Description

Technical Field

[0001] The invention relates to the technical field of rolling linear guide pair testing, and in particular to a rolling linear guide pair precision retention and reliability test bench and a working method. Background Art

[0002] The statements in this section merely provide background art related to the present invention and do not necessarily constitute prior art.

[0003] Rolling linear guide is a modern mechanical transmission element, widely used in mechanical manufacturing, automation equipment and other fields. It is suitable for positioning, guiding and supporting in precision mechanical equipment. Its accuracy retention and reliability test are important links to ensure product quality and performance.

[0004] The existing testing methods for the accuracy retention and reliability of rolling linear guide pairs have the following problems: (1) In the pursuit of high-precision testing, complex testing devices and long testing processes are often required, which reduces the testing efficiency. For example, although some existing testing devices can achieve high-precision testing of guide pairs, their complex structure and cumbersome operation result in low testing efficiency. (2) In reliability testing, the selection of loading methods and the accuracy of simulated working conditions have an important impact on the test results. However, the loading methods in the prior art may not be able to accurately simulate the stress conditions of the guide pairs in actual work, or there may be large differences between the simulated working conditions and the actual conditions, resulting in inaccurate test results. Summary of the invention

[0005] In order to address the deficiencies in the prior art, the present invention provides a rolling linear guide pair accuracy retention and reliability test bench and working method, which has a simple overall structure and high detection efficiency, can accurately simulate loading under different force conditions, and can simultaneously test two rolling linear guide pairs, thereby meeting the requirements of product performance comparison tests under exactly the same working conditions.

[0006] In order to achieve the above object, the present invention adopts the following technical solution: In a first aspect, the present invention provides a rolling linear guide pair precision retention and reliability test bench.

[0007] A rolling linear guide pair precision retention and reliability test bench, comprising: a bed assembly, a loading bracket, a driving assembly, a loading assembly and a measuring assembly, wherein the bed assembly comprises: a bed, a guide pair to be tested and a tooling plate, wherein the tooling plate is fixed on the bed, and the guide pair to be tested is mounted on the tooling plate; The driving assembly and the loading assembly are respectively connected to the loading bracket, the driving assembly is used to drive the loading bracket and the loading assembly to move, the loading assembly includes a loading head driven by an electric cylinder, and the measuring assembly is installed at the lower part of the loading assembly.

[0008] As a further limitation of the first aspect of the present invention, a vertical measurement reference and a horizontal measurement reference are arranged on the bed.

[0009] As a further limitation of the first aspect of the present invention, the interior of the bed is hollowed out, and structural reinforcement ribs are connected inside the hollowing out.

[0010] As a further limitation of the first aspect of the present invention, a first tooling plate and a second tooling plate are symmetrically installed on both sides of the upper part of the bed, a first guide rail pair to be tested is installed on the first tooling plate, and a second guide rail pair to be tested is installed on the second tooling plate.

[0011] As a further limitation of the first aspect of the present invention, the driving assembly includes: a guide rail pair, a drag bracket, a rack, a gear, a reducer and a driving servo motor, two guide rail pairs are symmetrically installed on the bed, and two sliders are installed on each guide rail pair; The dragging bracket is installed on the slider, and a mounting hole is provided on the dragging bracket. The driving servo motor is installed on the dragging bracket, and the reducer is installed on the dragging bracket and connected to the driving servo motor. A gear is installed at the lower end of the reducer, and the gear is meshed with the rack, and the rack is installed on the bed.

[0012] As a further limitation of the first aspect of the present invention, the loading bracket is installed on the dragging bracket.

[0013] As a further limitation of the first aspect of the present invention, the loading assembly includes: a loading motor, a loading reducer, an electric cylinder, an electric cylinder bracket, a nut, an adjusting screw and a loading head, the electric cylinder bracket is connected to the loading bracket, the electric cylinder is fixed to the electric cylinder bracket, the upper part of the electric cylinder is connected to the loading reducer, the reducer is connected to the loading motor, and the loading head is installed below the electric cylinder; The electric cylinder bracket is equipped with an adjusting nut, the adjusting screw is installed in the adjusting nut, and the adjusting screw is used to adjust the position of the center of the loading component. The present invention realizes higher-precision loading force control by means of an electric cylinder, and can achieve accuracy retention and reliability testing.

[0014] As a further limitation of the first aspect of the present invention, the measuring assembly comprises: a mounting plate, a U-shaped groove, a tension and pressure sensor, a mounting groove, a drag force measuring rod, an auxiliary bracket, a motion accuracy measuring bracket, an auxiliary support plate, a horizontal displacement sensor, a vertical displacement sensor, a chuck, a pressure sensor, a vibration sensor and a temperature sensor; The mounting plate is mounted on the upper surface of the corresponding slider of the guide rail pair to be measured, the mounting groove is mounted on one side of the mounting plate, the tension and pressure sensor is mounted on the mounting groove, the other end of the tension and pressure sensor is connected to the U-shaped groove, and the lower end of the drag force measuring rod is placed in the groove of the U-shaped groove and connected to the U-shaped groove; The auxiliary support plate is installed on the other side of the mounting plate, and the auxiliary support plate has a circular hole. The lower end of the auxiliary support is placed in the circular hole. The motion accuracy measurement support is installed in the middle of the mounting plate, and the motion accuracy measurement support is equipped with the horizontal displacement sensor and the vertical displacement sensor. The temperature sensor and the vibration sensor are arranged on the guide rail pair to be measured or on the corresponding sliders on the guide rail pair to be measured.

[0015] In a second aspect, the present invention provides a working method of a rolling linear guide pair precision retention and reliability test bench.

[0016] A working method of a rolling linear guide pair precision retention and reliability test bench, using the rolling linear guide pair precision retention and reliability test bench described in the first aspect of the present invention, comprises the following process: When performing the loading force test, the output torque of the loading motor is transmitted to the loading head through the reducer and the electric cylinder. The loading head clamps the clamp on the pressure sensor, and the loading assembly performs constant force and constant speed loading or variable force and variable speed loading on the guide pair to be tested. When performing the preload drag force test, the loading head is disengaged from the guide rail pair to be tested, and the tension and pressure sensor connected to the guide rail pair to be tested is pulled by the drag force measuring rod for measurement.

[0017] As a further limitation of the second aspect of the present invention, the motion accuracy of the linear guide pair under test in two directions is measured online by the horizontal displacement sensor and the vertical displacement sensor; The temperature sensor is used to measure the temperature of the slider in the test state in real time online, and the vibration sensor is used to measure the vibration condition of the slider in the test state online.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention innovatively proposes a rolling linear guide pair accuracy retention and reliability test bench, which has a simple overall structure and high detection efficiency. It can accurately simulate loading under different force conditions and can test two rolling linear guide pairs at the same time, meeting the requirements of product performance comparison tests under exactly the same working conditions.

[0019] 2. The present invention realizes higher-precision loading force control by means of an electric cylinder. The control of the electric cylinder is more precise. Through the control method of the electric cylinder, the accuracy retention and reliability test can be better realized.

[0020] 3. The present invention can perform real-time online measurement of the vertical loading force of the linear guide pair to be tested. When performing the loading force test, the output torque of the loading motor is transmitted to the loading head through the reducer and the electric cylinder. The loading head clamps the clamp on the pressure sensor, and the loading assembly applies a vertical loading force to the guide pair to be tested. The electric cylinder is used for loading, which can achieve the requirements of constant force and constant speed loading, variable force and variable speed loading of the linear guide pair, and changes in its load spectrum. The loading force has good following performance and is easy to implement programmed control.

[0021] 4. The present invention can perform online measurement of the pre-tightening drag force of the linear guide pair to be tested under the test state. When performing the pre-tightening drag force test, the loading head is disengaged from the guide pair to be tested, and the tension pressure sensor connected to the guide pair to be tested is pulled by the drag force measuring rod for measurement. During measurement, the loading head and the auxiliary bracket are disengaged from the guide pair to be tested to avoid affecting the detection of the drag force.

[0022] 5. The present invention can perform online measurement of the motion accuracy of the linear guide pair under test. A motion accuracy measuring bracket is installed on the guide pair to be tested. Two displacement sensors are installed on the motion accuracy measuring bracket to perform motion accuracy detection in two directions. The reference is set on the bed.

[0023] 6. The present invention can perform real-time online measurement of the temperature of the slider of the linear guide pair being tested and the key moving parts of the device, and can perform online measurement of the vibration condition of the slider of the linear guide pair being tested under the test state.

[0024] Advantages of additional aspects of the present invention will be given in part in the following description, and in part will become obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0026] Figure 1 A schematic diagram of a rolling linear guide pair accuracy retention and reliability test bench provided by the present invention; Figure 2 A structural schematic diagram of a bed assembly provided by the present invention; Figure 3 A schematic diagram of the structure of the drive assembly provided by the present invention; Figure 4 A schematic diagram of the structure of the loading assembly provided by the present invention; Figure 5 A schematic diagram of the structure of the measurement component provided by the present invention; in, 1. Bed assembly; 101. Bed; 102. Guide rail pair to be tested; 103. Fixture plate; 104. Vertical reference; 105. Horizontal reference; 2. Loading bracket; 3. Driving assembly; 301. Guide rail pair; 302. Driving bracket; 303. Rack; 304. Gear; 305. Speed ​​reducer; 306. Driving servo motor; 4. Loading assembly; 401. Loading motor; 402. Loading reducer; 403. Electric cylinder; 404. Electric cylinder bracket; 405. Nut; 406. Adjusting screw; 407. Loading head; 5. Measuring assembly; 501. Mounting plate; 502. U-shaped groove; 503. Tension and pressure sensor; 504. Mounting groove; 505. Drag force measuring rod; 506. Auxiliary bracket; 507. Motion accuracy measuring bracket; 508. Auxiliary support plate; 509. Horizontal displacement sensor; 510. Vertical displacement sensor; 511. Chuck; 512. Pressure sensor; 513. Vibration sensor; 514. Temperature sensor. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0029] In this implementation, a rolling linear guide pair precision retention and reliability test bench is proposed, such as Figure 1 As shown, it includes a bed assembly 1, a loading bracket 2, a driving assembly 3, a loading assembly 4 and a measuring assembly 5. In this implementation, preferably, as Figure 2 As shown, the bed assembly includes a bed 101, a guide rail pair 102 to be tested, a tooling plate 103, a vertical reference 104 and a horizontal reference 105. The bed 101 is provided with an installation reference for components connected to the bed 101, as well as a vertical reference 104 and a horizontal reference 105 for motion accuracy testing.

[0030] In the present implementation, preferably, the interior of the bed 101 is hollowed out and structural reinforcement ribs are added to minimize the weight and ensure the strength of use while meeting the use requirements. Tooling plates 103 (including a first tooling plate and a second tooling plate) are symmetrically installed on both sides of the bed 101. The tooling plates 103 are fixed to the bed 101 by bolts. The tooling plates 103 are provided with installation stations for multiple guide rail pairs 102 to be tested (including a first guide rail pair to be tested and a second guide rail pair to be tested). Different guide rail pairs to be tested can be installed, and the tooling plates 103 can be replaced according to the usage.

[0031] In this implementation, preferably, Figure 3 As shown, the driving assembly 3 includes: a guide rail pair 301, a drag bracket 302, a rack 303, a gear 304, a reducer 305 and a driving servo motor 306. The gear rack transmission is adopted, which can not only realize high-speed and stable operation, but also ensure structural stability during acceleration and deceleration. The two guide rail pairs 301 are symmetrically installed on the bed 101, fixed by wedge blocks and bolts, and two sliders are installed on each guide rail pair 301. The drag bracket 302 is installed on the sliders of the two guide rail pairs 301 by bolts and wedge blocks. The drag bracket 302 is provided with mounting holes. The driving servo motor 306 is installed on the drag bracket 302. The reducer 305 is installed on the drag bracket 302 and connected to the driving servo motor 306. The lower end of the reducer 305 is equipped with a gear 304, the gear 304 is meshed with the rack 303, and the rack 303 is installed on the bed 101 by bolts.

[0032] In this implementation, preferably, the loading bracket 2 is installed on the dragging bracket 302 and fixed by bolt connection.

[0033] In this implementation, preferably, Figure 4 As shown, the loading component 4 includes a loading motor 401, a loading reducer 402, an electric cylinder 403, an electric cylinder bracket 404, an adjusting nut 405, an adjusting screw 406 and a loading head 407. The electric cylinder bracket 404 is connected to the loading bracket 2 by bolts, the electric cylinder 403 is fixed on the electric cylinder bracket 404, the upper part of the electric cylinder 403 is connected to the loading reducer 402, the loading reducer 402 is connected to the loading motor 401, the loading head 407 is installed below the electric cylinder 403, the electric cylinder bracket 404 is equipped with an adjusting nut 405, the adjusting screw 406 is installed in the adjusting nut 405, and the position of the center of the loading component 4 can be adjusted by manually rotating the adjusting screw 406.

[0034] In this implementation, preferably, Figure 5As shown, the measuring assembly 5 comprises: a mounting plate 501, a U-shaped groove 502, a tension and pressure sensor 503, a mounting groove 504, a drag force measuring rod 505, an auxiliary bracket 506, a motion accuracy measuring bracket 507, an auxiliary support plate 508, a horizontal displacement sensor 509, a vertical displacement sensor 510, a clamp 511, a pressure sensor 512, a vibration sensor 513 and a temperature sensor 514. The mounting plate 501 is mounted on the upper surface of the corresponding slider of the guide rail pair 102 to be measured by bolts, a mounting groove 504 is provided on one side of the mounting plate 501, a tension and pressure sensor 503 is installed on the mounting groove 504, the tension and pressure sensor 503 is mounted on the mounting groove 504, the other end of the tension and pressure sensor 503 is connected to the U-shaped groove 502, and the lower end of the drag force measuring rod 505 can be placed in the groove of the U-shaped groove 502 and fixedly connected. An auxiliary support plate 508 is installed on the other side of the mounting plate 501. The auxiliary support plate 508 has a circular hole, and the lower end of the auxiliary bracket 506 can be placed therein. A motion accuracy measuring bracket 507 is installed in the middle of the mounting plate 501. The motion accuracy measuring bracket 507 is equipped with a horizontal displacement sensor 509 and a vertical displacement sensor 510 for measuring horizontal displacement and vertical displacement respectively. The vertical reference 104 and the horizontal reference 105 are set on the bed 101.

[0035] In this implementation, preferably, the temperature sensor 514 and the vibration sensor 513 are of adsorption type and can be adsorbed on various key parts of the guide rail pair 102 to be tested (for example, the guide rail pair 102 to be tested or the corresponding slider) to monitor the temperature changes and the changes in the vibration signal in real time.

[0036] In the specific use of the above test bench, it is possible to test two guide rail pairs 102 to be tested at the same time, meeting the requirements of product performance comparison test under completely the same working conditions, specifically including: (1) The vertical loading force of the guide rail pair 102 to be tested is measured online in real time. When the loading force test is performed, the output torque of the loading motor 401 is transmitted to the loading head 407 through the loading reducer 402 and the electric cylinder 403. The loading head 407 clamps the clamp 511 on the pressure sensor 512. The loading component 4 applies a vertical loading force to the guide rail pair 102 to be tested. The electric cylinder 403 is used for loading, which can realize constant force and constant speed loading or variable force and variable speed loading of the guide rail pair 102 to be tested, can meet the requirements of load spectrum changes, has good loading force following performance, and is easy to realize programmed control.

[0037] (2) The preload drag force of the guide rail pair 102 to be tested is measured online in the test state. When the preload drag force test is performed, the loading head 407 is disengaged from the guide rail pair 102 to be tested, and the tension pressure sensor 503 connected to the guide rail pair 102 to be tested is pulled by the drag force measuring rod 505 for measurement. During the measurement, the loading head 407 and the auxiliary bracket 506 are both disengaged from the guide rail pair 102 to avoid affecting the detection of the drag force; (3) The motion accuracy of the guide rail pair 102 to be tested is measured online in the test state. A motion accuracy measurement bracket 507 is installed on the guide rail pair 102 to be tested, and the motion accuracy is detected in two directions by using a horizontal displacement sensor 509 and a vertical displacement sensor 510; (4) Under the test state, the temperature of the slider of the guide rail pair 102 to be tested or the key parts on the main body of the guide rail pair 102 to be tested is measured online in real time, and the vibration of the slider of the guide rail pair 102 to be tested or the key parts on the main body of the guide rail pair 102 to be tested is measured online.

[0038] In this implementation, the test bench tests the loading force in the following manner: during loading, the loading head 407 clamps the clamp 511 on the pressure sensor 512, the loading component 4 applies a set loading force to the guide rail pair 102 to be tested, the driving component 3 drives the guide rail pair 102 to be tested to reciprocate at a set speed, the supporting software collects the data of the pressure sensor 512, draws a loading force change curve, and generates a loading force test report.

[0039] In this implementation, the drag force testing method is as follows: the driving component 3 drives the guide rail pair 102 to be tested to perform reciprocating motion at a set speed, and the drag force measuring rod 505 pulls the tension and pressure sensor 503 connected to the guide rail pair 102 to be tested for measurement. The supporting software collects the data of the tension and pressure sensor 503, draws a drag force change curve, and generates a drag force test report. During measurement, the loading head 407 is disengaged from the guide rail pair 102 to be tested to avoid affecting the detection of the drag force.

[0040] In this implementation, the test method of motion accuracy is as follows: the vertical displacement sensor 510 and the horizontal displacement sensor 509 are respectively placed on the vertical reference 104 and the horizontal reference 105 on the bed 101, and the driving component 3 drives the guide rail pair 102 to be tested to perform reciprocating motion according to the set parameters. The supporting software collects the data of the vertical displacement sensor 510 and the horizontal displacement sensor 509, draws the motion accuracy change curve, and generates a motion accuracy test report.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rolling linear guide pair precision retention and reliability test bench, characterized in that: include: The bed assembly, the loading bracket, the driving assembly, the loading assembly and the measuring assembly, the bed assembly includes: the bed, the guide rail pair to be measured and the tooling plate, the tooling plate is fixed on the bed, and the guide rail pair to be measured is installed on the tooling plate; The driving assembly and the loading assembly are respectively connected to the loading bracket. The driving assembly is used to drive the loading bracket and the loading assembly to move. The loading assembly includes a loading head driven by an electric cylinder. The measuring assembly is installed at the lower part of the loading assembly.

2. The rolling linear guide pair precision retention and reliability test bench according to claim 1, characterized in that: Vertical and horizontal measuring datums are arranged on the bed.

3. The rolling linear guide pair precision retention and reliability test bench according to claim 1, characterized in that: The interior of the bed is hollowed out, and structural reinforcement ribs are connected inside the hollowing.

4. The rolling linear guide pair precision retention and reliability test bench according to claim 1, characterized in that: A first tooling plate and a second tooling plate are symmetrically mounted on both sides of the upper part of the bed, a first guide rail pair to be measured is mounted on the first tooling plate, and a second guide rail pair to be measured is mounted on the second tooling plate.

5. The rolling linear guide pair precision retention and reliability test bench according to claim 1, characterized in that: The driving assembly includes: a guide rail pair, a drag bracket, a rack, a gear, a reducer and a driving servo motor. Two guide rail pairs are symmetrically installed on the bed, and two sliders are installed on each guide rail pair. The dragging bracket is installed on the slider, the dragging bracket is provided with a mounting hole, the driving servo motor is installed on the dragging bracket, the reducer is installed on the dragging bracket and is connected to the driving servo motor, a gear is installed at the lower end of the reducer, the gear is meshed with a rack, and the rack is installed on the bed.

6. The rolling linear guide pair precision retention and reliability test bench according to claim 5, characterized in that: The loading bracket is installed on the dragging bracket.

7. The rolling linear guide pair precision retention and reliability test bench according to claim 5 or 6, characterized in that: The loading assembly includes: a loading motor, a loading reducer, an electric cylinder, an electric cylinder bracket, a nut, an adjusting screw and a loading head. The electric cylinder bracket is connected to the loading bracket, the electric cylinder is fixed on the electric cylinder bracket, the upper part of the electric cylinder is connected to the loading reducer, the reducer is connected to the loading motor, and the loading head is installed below the electric cylinder; An adjusting nut is mounted on the electric cylinder bracket, an adjusting screw is installed in the adjusting nut, and the adjusting screw is used to adjust the position of the center of the loading component.

8. The rolling linear guide pair precision retention and reliability test bench according to claim 7, characterized in that: Measuring components, including: mounting plate, U-shaped groove, tension and pressure sensor, mounting groove, drag force measuring rod, auxiliary bracket, motion accuracy measuring bracket, auxiliary support plate, horizontal displacement sensor, vertical displacement sensor, chuck, pressure sensor, vibration sensor and temperature sensor; The mounting plate is mounted on the upper surface of the corresponding slider of the guide rail pair to be measured, a mounting groove is mounted on one side of the mounting plate, a tension pressure sensor is mounted on the mounting groove, the other end of the tension pressure sensor is connected to the U-shaped groove, and the lower end of the drag force measuring rod is placed in the groove of the U-shaped groove and connected to the U-shaped groove; An auxiliary support plate is installed on the other side of the mounting plate. The auxiliary support plate has a circular hole. The lower end of the auxiliary support is placed in the circular hole. A motion accuracy measurement support is installed in the middle of the mounting plate. The motion accuracy measurement support is equipped with a horizontal displacement sensor and a vertical displacement sensor. The temperature sensor and the vibration sensor are arranged on the guide rail pair to be measured or on the corresponding slider on the guide rail pair to be measured.

9. A working method of a rolling linear guide pair precision retention and reliability test bench, characterized in that: Utilizing the rolling linear guide pair precision retention and reliability test bench as described in claim 8, The process includes: When performing the loading force test, the output torque of the loading motor is transmitted to the loading head through the reducer and the electric cylinder. The loading head clamps the clamp on the pressure sensor, and the loading assembly performs constant force and constant speed loading or variable force and variable speed loading on the guide pair to be tested. When performing the preload drag force test, the loading head is disengaged from the guide rail pair to be tested, and the tension and pressure sensor connected to the guide rail pair to be tested is pulled by the drag force measuring rod for measurement.

10. The working method of the rolling linear guide pair precision retention and reliability test bench according to claim 9, characterized in that: The motion accuracy of the linear guide pair under test in two directions is measured online through the horizontal displacement sensor and the vertical displacement sensor; The temperature of the slider under the test state is measured online in real time by a temperature sensor, and the vibration condition of the slider under the test state is measured online by a vibration sensor.

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