A test bench for arc guide rail running-in and loading tests

Abstract

The invention discloses a circular arc guide running-in and loading test bench, comprising: two sets of circular arc guide pairs to be tested, wherein the two sets of circular arc guide pairs to be tested are aligned and fixedly connected; two sets of loading components, symmetrically arranged with respect to the circular arc guide pairs to be tested, connected with sliders on the corresponding sides, and used to apply loads to the circular arc guide pairs to be tested on the corresponding sides; two sets of driving components, symmetrically arranged at both ends of the connection line of the two sets of loading components, and located at the lower end of the circular arc guide to be tested, and used to drive the circular arc guide to be tested to slide relative to the slider to be tested; supporting components symmetrically arranged at both ends of the connection line of the two sets of loading components; two sets of gap adjustment components arranged at the upper end of the circular arc guide to be tested, the gap adjustment components can rotate relative to the circular arc guide to be tested, and are used to adjust the gap between the circular arc guide to be tested and the driving components; and a detection component, which detects the friction force generated by the relative sliding between the slider to be tested and the circular arc guide to be tested. Experimental testing of the dynamic performance of the circular arc guide can be realized.

Description

Technical Field

[0001] The invention belongs to the field of circular arc guide rail testing, in particular to a circular arc guide rail running-in and loading test bench. Background Art

[0002] High-end CNC machine tools are an important symbol and embodiment of a country's comprehensive national strength, and an important strategic support for the equipment manufacturing industry. Rolling linear guides are widely used in CNC machine tool guide components because of their strong load-bearing capacity, small dynamic and static friction coefficient, high positioning accuracy, good accuracy retention, and long life. Rolling guides can be divided into linear guides and circular arc guides according to different guide routes. At present, the research on linear guides has gradually matured and improved, while the research on circular arc guides is less. Circular arc guides also fill the blank demand for linear guides, so they have great possibilities and application potential. Therefore, studying the dynamic performance related to circular arc guides is crucial to the development of rolling guides.

[0003] Patent CN112051061B discloses a circular arc guide rail large load test bench, which uses its transmission parts, moving parts, support parts, and loading parts to cooperate with each other to interpolate an arc motion. Although it can also complete the running and testing of the circular arc guide rail, its control part is very complicated, the overall mechanism is relatively bulky, the inertia is large, the start-up is slow, the follow-up performance of the arc motion is poor, and it may not be able to reach the desired speed on the specified circular arc track. Patent CN113958604A discloses a synchronous circular arc guide pair, which can realize the precise transmission of the synchronous circular arc guide pair, but cannot realize the performance of loading and running and testing the circular arc guide rail. Patent CN1737387 discloses a rolling circular arc guide pair, which can realize gapless high-precision circular arc motion, but cannot realize the performance of loading and running and testing the circular arc guide rail. Patent CN112324801A discloses an arc guide rail, in which a slider can reciprocate in a longitudinal arc. The arc guide rail has strong rigidity and is easy to install, but it is not possible to load and test the performance of the arc guide rail. Summary of the invention

[0004] The purpose of the present invention is to provide a circular arc guide rail running-in and loading test bench to realize experimental testing of the dynamic performance of the circular arc guide rail.

[0005] The technical solution to achieve the purpose of the present invention is:

[0006] A circular arc guide rail running-in and loading test bench, comprising:

[0007] Two sets of circular arc guide rails to be tested, wherein two sets of circular arc guide rails to be tested are aligned and fixedly connected;

[0008] Two sets of loading components are symmetrically arranged about the circular arc guide rail to be tested, connected to the sliders on the corresponding sides, and used to apply loads to the circular arc guide rail pair to be tested on the corresponding sides;

[0009] Two sets of driving components are symmetrically arranged at the two ends of the line connecting the two sets of loading components and located at the lower end of the circular arc guide rail to be tested, and are used to drive the circular arc guide rail to be tested to slide relative to the slider to be tested;

[0010] Support components symmetrically arranged at both ends of the connection line of the two sets of loading components, used to support the circular arc guide rail to be tested;

[0011] Two sets of gap adjustment components are arranged at the upper end of the circular arc guide rail to be measured, and the gap adjustment components can rotate relative to the circular arc guide rail to be measured, and are used to adjust the gap between the circular arc guide rail to be measured and the driving component;

[0012] The detection component is used to monitor the load applied by the loading component and detect the friction force generated by the relative sliding between the tested sliding block and the tested circular arc guide rail.

[0013] Compared with the prior art, the present invention has the following significant advantages:

[0014] (1) The test bench of the present invention can detect two circular arc guide rail pairs at the same time. Each set of circular arc guide rail pairs is equipped with two pressure sensors. After running and testing, the values ​​measured by the pressure sensors are summed and the average value is calculated. The measured friction result is more accurate.

[0015] (2) The entire device is arranged symmetrically. The small circular end of the rotating arm can be rotated and fixed relative to the driving component bracket, so that the line connecting the center of the large circular end of the rotating arm and the center of the small circular end passes through the center of the measured arc guide rail, that is, the line connecting the center of the driving friction wheel and the center of the clamping wheel passes through the center of the measured arc guide rail, and the force of the device is more reasonable.

[0016] (3) The test bench of the present invention has closed force loading and low requirements for the rigidity of the frame. The entire test bench has a compact structure and is small in size and weight. It can detect arc guide rails of different radii and is easy to disassemble and operate. The test bench uses friction wheel transmission, which has low noise and is easy to maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the front side of the test bench of the present invention.

[0018] Figure 2 This is a schematic diagram of the structure of the test bench of the present invention with some parts removed from the reverse side.

[0019] Figure 3 It is a schematic diagram of the rotating arm structure of the test bench of the present invention.

[0020] Figure 4 It is a partial assembly diagram of the test bench of the present invention. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0022] Combination Figure 1-4 A circular arc guide running-in and loading test bench of the present embodiment includes two sets of circular arc guide pairs to be tested, two sets of loading components, two sets of driving components, two sets of gap adjustment components, two sets of supporting components, two displacement adjustment plates 1, and two sets of detection components; the two sets of loading components are symmetrically arranged about the circular arc guide 3 to be tested (perpendicular to the two ends of the sliding direction), the loading components are arranged in the middle of the driving components, and the two sets of driving components are respectively arranged on a set of displacement adjustment plates 1, which can slide up and down relative to the displacement adjustment plate 1, and are used to drive the circular arc guide to slide relative to the slider. Two sets of supporting components are symmetrically arranged on both sides of the connecting line of the two sets of loading components. A set of gap adjustment components is symmetrically arranged above the circular arc guide rail pair. Each set of driving components and supporting components can adjust the distance vertically up and down on the displacement adjustment plate 1 on each side respectively; the measured circular arc guide rail pair includes a matched measured circular arc guide rail 3 and a measured slider 12; the loading component includes a hydraulic cylinder 10 and a loading base 9; the driving component includes a motor 2, a coupling 15, a driving friction wheel 16, and a driving component bracket 6; the gap adjustment component includes a clamping wheel 4 and a rotating arm 5; the detection component includes a spoke sensor 8, a pressure sensor 11, and a loading tool 7; the supporting component includes a supporting friction wheel 14 and a supporting wheel bracket 13;

[0023] The two sets of measured circular arc guide rails 3 have the same radius and curvature, and are fastened by bolts and nuts after both ends are aligned, so that they can make circular motion together under the action of the driving friction wheel 16.

[0024] The two sets of measured circular arc guide rails 3 have the same radius and curvature, and are fastened by bolts and nuts after both ends are aligned, so that they can make circular motion together under the action of the driving friction wheel 16.

[0025] The hydraulic cylinder 10 is fixed on the loading base 9, which is fixed on the ground. A spoke sensor 8 is provided directly below the push rod of the hydraulic cylinder 10 and acts on the force-bearing area of ​​the spoke sensor 8. A loading fixture 7 is fixed directly below the spoke sensor 8, and a slider 12 to be tested is fixed directly below the loading fixture 7. During the test, the push rod of the hydraulic cylinder 10 acts on the force-bearing area of ​​the spoke sensor 8 downward, and the force is transmitted to the slider 12 to be tested through the loading fixture 7. The hydraulic cylinder 10 is used to apply loads of different sizes to the slider 12 to be tested, and the spoke sensor 8 is used to measure the load size applied by the hydraulic cylinder 10. The two sides of the loading fixture 7 are connected to the bosses on the loading base 9 on the corresponding side through the pressure sensor 11, which is used to detect the friction force generated by the relative sliding between the slider 12 to be tested and the circular arc guide rail 3 to be tested. Connectors are provided at both ends of the pressure sensor 11, and the pressure sensor is fixed between the loading fixture 7 and the bosses of the loading base 9 through the connector.

[0026] The motor 2 is fixed on the driving component bracket 6, and the motor 2 is connected to the coupling 15; the coupling 15 is connected to the driving friction wheel 16 through the friction wheel shaft; both ends of the friction wheel shaft of the driving friction wheel 16 are rotatably supported on the driving component bracket 6, and the driving friction wheel 16 drives the measured arc guide rail 3 to reciprocate through the friction force between the measured arc guide rail 3 and the driving friction wheel 16.

[0027] The clamping wheel 4 is provided with bearings on both sides thereof, and is fixed in the middle of the two rotating arms 5 by bolts and nuts. When the measured arc guide rail 3 moves, the clamping wheel 4 can realize self-rotation. The rotating arm 5 is formed by connecting two sections of arc plates, including a small arc end 51 at one end connected to the clamping wheel 4, and a large arc end 52 at one end connected to the driving component bracket 6. The small arc end is provided with a waist-shaped hole 53, and the length direction of the waist-shaped hole 53 is colinear with the line connecting the centers of the small arc end 51 and the large arc end 52. The clamping wheel 4 is installed between the left and right rotating arms 5. When installing, the clamping wheel 4 passes through the waist-shaped holes 53 of the two rotating arms 5 and is then fastened by fasteners. By adjusting the installation position of the clamping wheel 4 through the waist-shaped hole 53, the clamping wheel 4 can be tightly fitted to the upper side of the measured arc guide rail 3. The large arc end 52 of the rotating arm 5 is a detachable structure, which is convenient for the subsequent installation of the rotating arm 5 on the driving component bracket 6. Four arc-shaped waist-shaped holes 54 with an equal radius at an interval of 90 degrees are arranged outwardly around the center hole of the large arc end 52, and a corresponding arc-shaped waist-shaped hole is also provided on the driving component bracket 6. When installing the rotating arm 5, the center hole of the large arc end 52 is sleeved on the driving component bracket 6, and the arc-shaped waist-shaped hole 54 of the large arc end 52 is aligned with the arc-shaped waist-shaped hole 54 on the driving component bracket 6, and the installation position of the waist-shaped hole is adjusted so that the line connecting the center of the large arc end 52 of the rotating arm 5 and the center of the small arc end 51 passes through the center of the measured arc guide rail 3, that is, the line connecting the center of the driving friction wheel 16 and the center of the clamping wheel 4 passes through the center of the measured arc guide rail 3, and the force of the device is more reasonable.

[0028] Both ends of the supporting wheel shaft of the supporting friction wheel 14 are rotatably supported on the supporting wheel bracket 13; a plurality of waist-shaped through holes are provided on the displacement adjustment plate 1, and a plurality of bolt holes are provided on the driving component bracket 6 and the supporting wheel bracket 13. When the driving component bracket 6 and the supporting wheel bracket 13 slide up and down on the displacement adjustment plate 1, it is necessary to align each bolt hole so that it can slide up and down along the corresponding waist-shaped through hole. After adjusting the required position, the driving component bracket 6 and the supporting wheel bracket 13 are fixed to the displacement adjustment plate 1 by bolts and nuts. When measuring arc guide rails of different radii, it is only necessary to adjust the relative positions of the driving component bracket 6 and the supporting wheel bracket 13 on the displacement adjustment plate 1.

[0029] In a further embodiment, the upper and lower ends of the driving friction wheel shaft are supported on the driving component bracket 6 through cylindrical roller bearings, and the upper and lower ends of the supporting wheel shaft are supported on the supporting wheel bracket 13 through cylindrical roller bearings.

[0030] In the test state, a load is applied to the tested slider 12 through the loading component, and the motor 2 drives the driving friction wheel 16 to realize forward and reverse rotation, and the supporting friction wheel 14 supports the tested arc guide rail 3. The driving friction wheel 16 drives the two tested arc guide rails 3 to make circular motion, so as to realize the relative sliding of the tested slider 12 and the tested arc guide rail 3, and the friction between the two is detected by the pressure sensors 11 on both sides of the loading fixture 7.

Claims

1. A circular arc guide rail running-in and loading test bench, characterized in that: include: Two sets of circular arc guide rails to be tested, wherein two sets of circular arc guide rails to be tested are aligned and fixedly connected; Two sets of loading components are symmetrically arranged about the circular arc guide rail to be tested, connected to the sliders on the corresponding sides, and used to apply loads to the circular arc guide rail pair to be tested on the corresponding sides; Two sets of driving components are symmetrically arranged at the two ends of the line connecting the two sets of loading components and located at the lower end of the circular arc guide rail to be tested, and are used to drive the circular arc guide rail to be tested to slide relative to the slider to be tested; Support components symmetrically arranged at both ends of the line connecting the two sets of loading components are used to support the circular arc guide rail to be tested; Two sets of gap adjustment components are arranged at the upper end of the circular arc guide rail to be measured, and the gap adjustment components can rotate relative to the circular arc guide rail to be measured, and are used to adjust the gap between the circular arc guide rail to be measured and the driving component; A detection component, used to monitor the load applied by the loading component and detect the friction force generated by the relative sliding between the tested slider and the tested circular arc guide rail; The gap adjustment component includes a clamping wheel and a rotating arm; The clamping wheel is connected to the driving component through a rotating arm; The rotating arm is formed by connecting two arc plates, including a small arc end connected to the clamping wheel and a large arc end connected to the driving component; A waist-shaped hole is provided at the small arc end for adjusting the installation position of the clamping wheel up and down; the length direction of the waist-shaped hole is collinear with the line connecting the centers of the small arc end and the large arc end; A center hole rotatably connected to the driving component is provided at the center of the large arc end, and a plurality of arc-shaped waist-shaped holes are arranged at equal intervals around the center hole of the large arc end. The driving component is provided with corresponding arc-shaped waist-shaped holes. The installation position of the waist-shaped holes is adjusted so that the line connecting the center of the large arc end of the rotating arm and the center of the small arc end passes through the center of the measured arc guide rail; The loading component includes a hydraulic cylinder and a loading base; The hydraulic cylinder is fixed on the loading base, and the hydraulic cylinder push rod is provided with a spoke sensor, which is connected to the tested slider through the loading fixture, and a pressure sensor is provided between the tested slider and the loading base to detect the friction force generated by the relative sliding between the tested slider and the tested circular arc guide rail; The driving component includes a motor, a coupling, a driving friction wheel, and a driving component bracket; The motor is fixed on the driving component bracket, and the motor is connected to the driving friction wheel through a coupling; the driving friction wheel is rotatably supported on the driving component bracket, and the driving friction wheel drives the measured arc guide rail to reciprocate through the friction force between the driving friction wheel and the measured arc guide rail.

2. The arc guide rail running-in and loading test bench according to claim 1 is characterized in that: The supporting component includes a supporting friction wheel and a supporting wheel bracket; The supporting friction wheel is rotatably supported on the supporting wheel bracket and is used for supporting the circular arc guide rail to be measured.

3. The arc guide rail running-in and loading test bench according to claim 1 is characterized in that: The driving component bracket is connected to the displacement adjustment plate and can slide up and down and be fixed relative to the displacement adjustment plate.

4. The arc guide rail running-in and loading test bench according to claim 2 is characterized in that: The support wheel bracket is connected to the displacement adjustment plate and can slide up and down and be fixed relative to the displacement adjustment plate.

Images