Rolling linear guide rail pair service life and rated dynamic load test bed and working method

Abstract

The invention belongs to the technical field of rolling linear guide rail pair tests. According to the service life and rated dynamic load test bed for the rolling linear guide rail pair and the working method, a guide rail is installed on a bed body, and a guide sliding block is slidably connected to the guide rail in a matched mode; the loading measurement assembly comprises a workbench, a quick-change tool and a to-be-measured guide rail, and the to-be-measured guide rail is installed on the workbench through the quick-change tool; the dragging assembly is fixed to one end of the lathe bed, a movable part of the dragging assembly is connected with the workbench, and the workbench is installed on the guide sliding block and can slide along the guide sliding rail under driving of the dragging assembly. The portal frame is arranged on the upper portion of the lathe bed, and the loading unit and the measuring unit of the loading measuring assembly are arranged on the portal frame. The device is simple in structure and high in stability, the reciprocating motion of the loading test assembly is strong, the loading requirement is met, stable measurement of loading force and dragging force is achieved, real-time measurement of temperature and vibration in the measurement process is achieved, and the measurement precision is guaranteed.

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 life and rated dynamic load 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] The rolling linear guide pair is composed of a linear guide, a slider and a rolling element (ball or roller), and can be used as a component for guiding and supporting linear motion. Among them, the linear guide has a cross-section of a specific shape, containing one or more longitudinal raceways for the slider to move; the slider is composed of a slider body, a return device and a seal, etc. The slider body has several longitudinal raceways and a corresponding number of circulation channels and mounting holes; the rolling element performs a cyclic reciprocating motion between the slider and the linear guide. The life and rated dynamic load test of the rolling linear guide pair is a key link in evaluating its performance.

[0004] Existing testing devices have the following problems: (1) Traditional testing devices mostly use weight loading or lever loading, which has a limited range of application and may not be able to fully simulate the complex load conditions in actual working conditions. The loading accuracy and stability may also be affected, resulting in inaccurate test results. (2) Reciprocating motion mechanisms mostly use mechanisms such as crank sliders, which have a limited stroke adjustment range and may not be able to meet the test requirements of rolling linear guide pairs of different specifications and types. (3) During long-term operation, the test device may be affected by factors such as temperature and vibration, resulting in insufficient stability of the 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 life and rated dynamic load test bench and a working method, which have a simple structure and strong stability, and designs a loading test assembly with strong reciprocating motion and meeting loading requirements, thereby achieving stable measurement of loading force and drag force, and achieving real-time measurement of temperature and vibration during the measurement process, thereby ensuring measurement accuracy.

[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 life and rated dynamic load test bench.

[0007] A rolling linear guide pair life and rated dynamic load test bench, comprising: a bed, a drag assembly, a gantry and a loading and measuring assembly, wherein a guide rail is installed on the bed, a guide slider is slidably connected to the guide rail, and the loading and measuring assembly comprises a loading head controlled by a hydraulic cylinder; The loading and measuring assembly comprises: a workbench, a quick-change fixture and a guide rail to be measured, wherein the guide rail to be measured is mounted on the workbench through the quick-change fixture; The drag assembly is fixed to one end of the bed, the movable part of the drag assembly is connected to the workbench, the workbench is installed on the guide slide, and the workbench can slide along the guide slide rail driven by the drag assembly; The gantry is arranged on the upper part of the bed, and the loading unit and the measuring unit of the loading and measuring assembly are arranged on the gantry.

[0008] 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.

[0009] As a further limitation of the first aspect of the present invention, three mutually parallel quick-change fixtures are installed on the workbench, and each of the quick-change fixtures is installed with a guide rail to be tested.

[0010] As a further limitation of the first aspect of the present invention, two guide rails are symmetrically installed on both sides of the bed, and each guide rail is equipped with four guide sliders.

[0011] As a further limitation of the first aspect of the present invention, the drag assembly comprises: a servo motor, a first bearing seat, a coupling, a lead screw, a lead screw nut, a second bearing seat and a tension nut, the servo motor is mounted at one end of the bed, and the servo motor is connected to the lead screw through a coupling; The first bearing seat and the second bearing seat are installed on the bed, the lead screw is installed between the first bearing seat and the second bearing seat in a way that both ends are fixed, the lead screw nut is sleeved on the lead screw, and a tension nut is installed at the end of the lead screw.

[0012] As a further limitation of the first aspect of the present invention, the workbench is fixedly connected to the lead screw nut and the guide slider by bolts.

[0013] As a further limitation of the first aspect of the present invention, the loading test assembly further includes: a U-shaped groove, a tension and pressure sensor, a mounting groove, a drag force measuring rod, a hydraulic cylinder, a loading head, a chuck, a pressure sensor, a mounting plate, a temperature sensor, a vibration sensor and a guide rail slider to be tested; The upper surface of the slider of the guide rail to be tested is provided with the mounting plate, the pressure sensor is provided on the mounting plate, the clamp is provided on the pressure sensor, the hydraulic cylinder is provided on the gantry, the loading head is provided on the movable end of the hydraulic rod, and the hydraulic cylinder is used to clamp the clamp on the pressure sensor through the loading head to apply a loading force to the guide rail to be tested; The mounting plate is provided with the mounting groove, the tension and pressure sensor is installed between the U-shaped groove and the mounting groove and is respectively connected to the U-shaped groove and the mounting groove, the lower end of the drag force measuring rod is placed in the U-shaped groove and is connected to the U-shaped groove, and the temperature sensor and the vibration sensor are installed on the corresponding slider of the guide rail to be measured.

[0014] This implementation method, by adopting the hydraulic cylinder loading method, has stronger stability and longer service life. It can realize the life and rated dynamic load test of the rolling linear guide pair through long-term repeated tests, thus ensuring better test results.

[0015] As a further limitation of the first aspect of the present invention, the temperature sensor and the vibration sensor are installed at different positions on the corresponding sliding block of the guide rail to be measured by adsorption.

[0016] In a second aspect, the present invention provides a working method of a rolling linear guide pair life and rated dynamic load test bench.

[0017] A working method of a rolling linear guide pair life and rated dynamic load test bench, using the rolling linear guide pair life and rated dynamic load test bench described in the first aspect of the present invention, comprises the following process: The guide rail slider to be tested is vertically loaded by a hydraulic cylinder installed on the gantry, and the loading force is continuously adjustable. The pressure sensor on the upper surface of the guide rail slider to be tested performs real-time online measurement of the loading force; The drag force is measured by pulling the tension pressure sensor connected to the workpiece to be measured through the drag force measuring rod. During the measurement, the loading head is separated from the guide rail to be measured.

[0018] As a further limitation of the second aspect of the present invention, the temperature of the slider in the test state is measured online in real time by the temperature sensor, and the vibration condition of the slider in the test state is measured online by the vibration sensor.

[0019] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention innovatively proposes a rolling linear guide pair life and rated dynamic load test bench and working method, which has a simple structure and strong stability. A loading test assembly with strong reciprocating motion and meeting loading requirements is designed, which realizes stable measurement of loading force and drag force, realizes real-time measurement of temperature and vibration during the measurement process, and ensures measurement accuracy.

[0020] 2. The present invention adopts a hydraulic cylinder loading method, which has stronger stability and long service life. It can realize the life and rated dynamic load test of the rolling linear guide pair through long-term repeated tests, thereby ensuring better test results.

[0021] 3. The present invention can realize the simultaneous testing of three rolling linear guide pairs, meeting the requirements of product performance comparison tests under completely the same working conditions.

[0022] 4. The present invention can perform real-time online measurement of the vertical loading force of the linear guide pair being measured. The vertical loading of the slider is realized by three loading hydraulic cylinders installed on the gantry. The loading force is continuously adjustable. The pressure sensor is installed on the upper surface of the slider to realize real-time online measurement of the loading force.

[0023] 5. The present invention can measure the pre-tightening drag force of the linear guide pair under the test state online. The drag force is measured by pulling the tension and pressure sensors connected to the workpiece to be measured through the drag force measuring rod. During measurement, the loading head is separated from the guide rail to be measured to avoid affecting the detection of the drag force.

[0024] 6. The present invention can perform real-time online measurement of the temperature of the slider of the linear guide pair to be tested and the key moving parts of the device, and can perform online measurement of the slider vibration condition of the linear guide pair to be tested under the test state. The temperature sensor and the vibration sensor are placed on the slider of the guide rail to be tested by adsorption, and the sensors can be placed at multiple key positions to achieve more accurate measurement.

[0025] 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

[0026] 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.

[0027] Figure 1 A schematic diagram of a rolling linear guide pair life and rated dynamic load test bench provided by the present invention; Figure 2 A schematic diagram of a drag component provided by the present invention; Figure 3 A schematic diagram of a loading test assembly provided by the present invention; Figure 4 A schematic diagram of a measurement assembly provided by the present invention; Figure 5 A top view of the gantry provided by the present invention; Among them, 1. bed; 2. drag assembly; 3. gantry; 4. loading and measuring assembly; 201. servo motor; 202. first bearing seat; 203. coupling; 204. lead screw; 205. lead screw nut; 206. second bearing seat; 207. tension nut; 208. guide slider; 209. guide rail; 401. workbench; 402. quick-change tooling; 403. guide rail to be measured; 404. U-shaped groove; 405. tension and pressure sensor; 406. mounting groove; 407. drag force measuring rod; 408. hydraulic cylinder; 409. loading head; 410. chuck; 411. pressure sensor; 412. mounting plate; 413. temperature sensor; 414. vibration sensor; 415. guide rail slider to be measured. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0029] 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.

[0030] In this implementation, a rolling linear guide pair life and rated dynamic load test bench is proposed, such as Figure 1 As shown, it includes a bed 1, a gantry 3, a drag component 2 and a loading and measuring component 4.

[0031] In the present implementation, preferably, the bed 1 has mounting bases for various connected components, the interior is hollowed out, and structural reinforcement ribs are added to minimize the weight and ensure strength while meeting usage requirements.

[0032] In this implementation, preferably, Figure 2 As shown, the drag assembly 2 includes a servo motor 201 , a first bearing seat 202 , a coupling 203 , a lead screw 204 , a lead screw nut 205 , a second bearing seat 206 , a tensioning nut 207 , a guide slider 208 and a guide rail 209 .

[0033] The servo motor 201 is installed at one end of the bed 1. The servo motor 201 is connected to the screw 204 through a coupling 203. The left and right bearing seats (i.e., the first bearing seat 202 and the second bearing seat 206) are installed on the bed 1 through bolts. The screw 204 is installed between the first bearing seat 202 and the second bearing seat 206 in a fixed manner at both ends. The screw nut 205 is sleeved on the screw 204. A tension nut 207 is installed at the end of the screw 204, which can apply a pre-tightening force to the screw 204, eliminate axial clearance, and improve accuracy and stability.

[0034] In this implementation, preferably, two guide rails 209 are symmetrically installed on both sides of the bed and fixed by bolts and wedge blocks. Four guide sliders 208 are installed on each guide rail 209. The guide rails 209 play a guiding and bearing role when the workbench 401 moves.

[0035] In this implementation, preferably, Figure 3 As shown, the loading and testing assembly includes a workbench 401, a quick-change fixture 402, a guide rail to be tested 403, a U-shaped groove 404, a tension pressure sensor 405, a mounting groove 406, a drag force measuring rod 407, a hydraulic cylinder 408, a loading head 409, a chuck 410, a pressure sensor 411, a mounting plate 412, a temperature sensor 413, a vibration sensor 414 and a guide rail slider 415 to be tested.

[0036] The workbench 401 is fixedly connected to the lead screw nut 205 and the guide slider 208 by bolts. Three quick-change fixtures 402 can be installed on the workbench 401. The quick-change fixtures 402 are fixed to the workbench 401 by bolts and wedge blocks. The quick-change fixtures 402 can adapt to any fixture position on the workbench. The guide rail 403 to be tested is installed on the quick-change fixture 402. Different guide rails 403 to be tested correspond to specific quick-change fixtures 402, and three different straight lines of the guide rails 403 to be tested can be tested at the same time.

[0037] In this implementation, preferably, Figure 4 and Figure 5 As shown, the gantry 3 is installed on the bed 1 and fixed by bolts. The gantry 3 is provided with mounting holes. Three hydraulic cylinders 408 and three drag force measuring rods 407 are installed on the gantry 3 by bolts.

[0038] A mounting plate 412 is mounted on the upper surface of the guide rail slider 415 to be measured, a pressure sensor 411 is mounted on the mounting plate 412, and a chuck 410 is mounted on the pressure sensor 411. When loading, the hydraulic cylinder 408 extends, and the loading head 409 clamps the chuck 410 on the pressure sensor 411 to apply a loading force to the guide rail 403 to be measured. A mounting groove 406 is mounted on the upper left end of the mounting plate 412 through bolts, and the tension pressure sensor 405 is installed between the U-shaped groove 404 and the mounting groove 406 (and is fixedly connected to the U-shaped groove 404 and the mounting groove 406, respectively), and the lower end of the drag force measuring rod 407 can be placed in the U-shaped groove 404 (and is fixedly connected to the U-shaped groove 404). The dragging force is measured by pulling the tension pressure sensor 405 connected to the workpiece to be measured by the dragging force measuring rod 407. During measurement, the loading head 409 is separated from the guide rail 403 to be measured to avoid affecting the detection of the dragging force. The temperature sensor 413 and the vibration sensor 414 are placed on the guide rail slider 415 to be measured by adsorption. Sensors can be placed at multiple key locations to achieve more accurate measurement.

[0039] This implementation method can test three rolling linear guides simultaneously, meeting the requirements of product performance comparison test under exactly the same working conditions, including: (1) The vertical loading force of the guide rail 403 to be tested is measured online in real time. The vertical loading of the guide rail slider 415 to be tested is realized by three loading hydraulic cylinders 408 installed on the gantry 3. The loading force is continuously adjustable. The pressure sensor 411 is installed on the upper surface of the guide rail slider 415 to realize the real-time online measurement of the loading force. (2) The preload drag force of the guide rail 403 to be tested under the test state is measured online. The drag force is measured by pulling the tension and pressure sensor connected to the guide rail 403 to be tested by the drag force measuring rod 407. During the measurement, the loading head 409 is separated from the guide rail 403 to avoid affecting the detection of the drag force. (3) The temperature of the key moving parts of the guide rail slider 415 to be tested is measured online in real time, and the vibration condition of the slider of the guide rail 403 to be tested under the test state is measured online. The temperature sensor 413 and the vibration sensor 414 are placed on the guide rail slider 415 to be tested by adsorption. Sensors can be placed at multiple key positions.

[0040] In this implementation, the test bench tests the loading force in the following manner: during loading, the loading head 409 clamps the clamp 410 on the pressure sensor 411, the loading and measuring component 4 applies a set loading force to the guide rail 403 to be tested, the dragging component 2 drives the guide rail 403 to be tested to reciprocate at a set speed, the supporting software collects the data of the pressure sensor 411, draws a loading force change curve, and generates a loading force test report.

[0041] In this implementation, the drag force testing method is as follows: the drag component 2 drives the guide rail 403 to be tested to perform reciprocating motion at a set speed, and the drag force measuring rod 407 pulls the tension and pressure sensor 405 connected to the guide rail 403 to be tested for measurement. The supporting software collects the data of the tension and pressure sensor 405, draws a drag force change curve, and generates a loading force test report. During measurement, the loading head 409 is disengaged from the guide rail 403 to be tested to avoid affecting the detection of the drag force.

[0042] 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 life and rated dynamic load test bench, It is characterized in that It includes: a bed, a drag assembly, a gantry and a loading and measuring assembly, wherein a guide rail is installed on the bed, and a guide slider is slidably connected to the guide rail; The loading and measuring assembly comprises: a workbench, a quick-change fixture and a guide rail to be measured, wherein the guide rail to be measured is installed on the workbench through the quick-change fixture, and the loading and measuring assembly comprises a loading head controlled by a hydraulic cylinder; The drag assembly is fixed to one end of the bed, the movable part of the drag assembly is connected to the workbench, the workbench is installed on the guide slide, and the workbench can slide along the guide slide under the drive of the drag assembly; The gantry is arranged on the upper part of the bed, and the loading unit and the measuring unit of the loading and measuring assembly are arranged on the gantry.

2. The rolling linear guide pair life and rated dynamic load 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 out.

3. The rolling linear guide pair life and rated dynamic load test bench according to claim 1, characterized in that: Three mutually parallel quick-change fixtures are installed on the workbench, and one of the guide rails to be tested is installed on each of the quick-change fixtures.

4. The rolling linear guide pair life and rated dynamic load test bench according to claim 1, characterized in that: The two guide rails are symmetrically installed on both sides of the bed, and each guide rail is equipped with four guide slide blocks.

5. The rolling linear guide pair life and rated dynamic load test bench according to claim 1, characterized in that: The drag assembly includes: a servo motor, a first bearing seat, a coupling, a lead screw, a lead screw nut, a second bearing seat and a tension nut. The servo motor is installed at one end of the bed, and the servo motor is connected to the lead screw through the coupling. The first bearing seat and the second bearing seat are installed on the bed, the lead screw is installed between the first bearing seat and the second bearing seat in a way that both ends are fixed, the lead screw nut is sleeved on the lead screw, and the tension nut is installed at the end of the lead screw.

6. The rolling linear guide pair life and rated dynamic load test bench according to claim 5, characterized in that: The workbench is fixedly connected to the lead screw nut and the guide slide block through bolts.

7. The rolling linear guide pair life and rated dynamic load test bench according to claim 1, characterized in that: The loading test assembly also includes: a U-shaped groove, a tension and pressure sensor, a mounting groove, a drag force measuring rod, a hydraulic cylinder, a loading head, a chuck, a pressure sensor, a mounting plate, a temperature sensor, a vibration sensor and a guide rail slider to be tested; The upper surface of the slider of the guide rail to be tested is provided with the mounting plate, the pressure sensor is provided on the mounting plate, the clamp is provided on the pressure sensor, the hydraulic cylinder is provided on the gantry, the loading head is provided on the movable end of the hydraulic rod, and the hydraulic cylinder is used to clamp the clamp on the pressure sensor through the loading head to apply a loading force to the guide rail to be tested; The mounting plate is provided with the mounting groove, the tension and pressure sensor is installed between the U-shaped groove and the mounting groove and is respectively connected to the U-shaped groove and the mounting groove, the lower end of the drag force measuring rod is placed in the U-shaped groove and is connected to the U-shaped groove, and the temperature sensor and the vibration sensor are installed on the corresponding slider of the guide rail to be measured.

8. The rolling linear guide pair life and rated dynamic load test bench according to claim 7, characterized in that: The temperature sensor and the vibration sensor are installed at different positions on the corresponding sliding block of the guide rail to be measured by adsorption.

9. A method for operating a rolling linear guide pair life and rated dynamic load test bench, characterized in that: Utilizing the rolling linear guide pair life and rated dynamic load test bench as described in claim 7, The process includes: The slider is loaded vertically by a hydraulic cylinder installed on the gantry, and the loading force is continuously adjustable. The pressure sensor on the upper surface of the slider performs real-time online measurement of the loading force. The drag force is measured by pulling the tension pressure sensor connected to the workpiece to be measured through the drag force measuring rod. During the measurement, the loading head is separated from the guide rail to be measured.

10. The operating method of the rolling linear guide pair life and rated dynamic load test bench according to claim 9, characterized in that: 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.

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