Abrasion testing device

Abstract

The invention provides an abrasion testing device which comprises a support, a friction mechanism and a clamping mechanism, the friction mechanism comprises a friction roller rotationally installed on the support and a driving motor used for driving the friction roller to rotate, and the rotating axis of the friction roller is parallel to the horizontal plane; the clamping mechanism comprises a main shaft and a plurality of movable arms, the main shaft is fixed on the support and is parallel to the friction roller, the movable arms are hinged to the main shaft, balancing weights are arranged on the movable arms, and clamping heads are arranged at the heads of the movable arms and are used for clamping a workpiece to be detected and enabling the workpiece to be detected to be attached to the surface of the friction roller for abrasion testing. The abrasion testing device can test multiple or multiple groups of samples at the same time, and is high in testing flexibility and efficiency, good in testing accuracy and precision, convenient to operate and capable of saving labor.

Description

Technical Field

[0001] The invention relates to a testing device, in particular to a wear testing device. Background Art

[0002] After the product surface is sprayed, in order to detect its firmness, a wear test is often required. Wear is generally used to detect the wear resistance of a workpiece or product. Some tests are also conducted to make some comparisons and compare the wear resistance of different workpieces or products.

[0003] Testing the wear resistance of a single workpiece is relatively simple. It can be done directly according to the wear resistance requirements of the workpiece or product. It can be done by grinding with a grinding wheel or other wear-produced methods. Of course, due to many manual factors, even if the same product is tested by the same person and the same method, there may be large deviations, not to mention different people. If existing machines are used, the principle is the same. Due to different forces or time differences, the final accuracy of tests on more than two products will be low.

[0004] How to better improve efficiency and achieve better test results and accuracy is a problem that existing test devices have not solved, but it is also an urgent problem to be solved. Summary of the invention

[0005] Technical issues to be solved

[0006] The technical problem to be solved by the present invention is to provide a wear testing device which has a compact structure, can detect multiple workpieces at the same time, has high detection precision and accuracy, and is simple and convenient to operate.

[0007] Technical solutions to the problem

[0008] The present invention provides a wear testing device, which comprises:

[0009] Bracket 1, serving as a mounting carrier, provides a stable support for other components;

[0010] The friction mechanism 5 comprises a friction roller 53 rotatably mounted on the bracket 1 and a driving motor 51 for driving the friction roller 53 to rotate, wherein the rotation axis of the friction roller 53 is parallel to the horizontal plane;

[0011] The clamping mechanism 3 includes a main shaft 35 fixed on the bracket 1 and parallel to the friction roller 53 and a plurality of movable arms 34 hinged on the main shaft 35, the movable arm 34 is provided with a counterweight block, and the head of the movable arm 34 is provided with a clamping head 7 for clamping the workpiece 8 to be tested and making it fit on the surface of the friction roller 53 for wear testing.

[0012] Furthermore, the tail of the movable arm 34 is hinged on the main shaft 35 through a bearing and can be rotated. The rotation limit positions of the movable arm 34 respectively form a detection position and a stop position. When the movable arm 34 rotates to the detection position, the lower end of the workpiece 8 to be detected on the clamping head 7 is in contact with the surface of the friction roller 53; when the movable arm 34 rotates to the stop position, the workpiece 8 to be detected is detached from and away from the friction roller, and can be used to conveniently replace the clamping head or the workpiece to be detected.

[0013] Furthermore, when the movable arm 34 rotates to the stop position, the clamping head 7 is located on the side away from the friction roller 53 and has no movement tendency to approach the friction roller under the action of gravity, thereby avoiding the movable arm being forced to automatically contact the friction roller when in the stop position.

[0014] Furthermore, when the workpiece 8 to be tested contacts the surface of the friction roller 53 , the angle between the movable arm 34 and the horizontal plane is less than or equal to 3°, so as to ensure the accuracy of the test.

[0015] Furthermore, when the workpiece 8 to be tested contacts the surface of the friction roller 53 , the movable arm 34 is parallel to the horizontal plane, thereby ensuring the uniformity and consistency of the test.

[0016] Furthermore, the angle between the detection station and the stop station is greater than or equal to 150 degrees and less than or equal to 180 degrees.

[0017] Furthermore, there are at least three movable arms 34 , which are equidistantly arranged along the axis direction of the main shaft 35 .

[0018] Furthermore, a first positioning sleeve for radially positioning the movable arms 34 is disposed on the main shaft 35 , and the first positioning sleeve is disposed between two adjacent movable arms 34 .

[0019] Furthermore, the bracket 1 is provided with a retaining frame 33, and the retaining frame 33 is provided with a receiving groove 330 with an open upper end. The receiving grooves 330 are the same in number and correspond one to one with the movable arms 34, and are used to accommodate the movable arms at the detection station and prevent their radial swing.

[0020] Furthermore, the retaining frame 33 is arranged between the hinge point of the movable arm 34 and the counterweight block.

[0021] Furthermore, the distance between the retaining frame 33 and the hinge point of the movable arm 34 is 1 / 4-1 / 3 of the distance between the hinge point of the movable arm and the clamping head.

[0022] Furthermore, it also includes a cooling mechanism 6, which includes a number of coolant nozzles 61 that is the same as the number of the movable arms 34, and the coolant nozzles 61 are directed toward the contact point between the friction roller 53 and the workpiece to be inspected. The lower end of the friction roller 53 is provided with a liquid collecting tank for collecting the coolant on the friction roller.

[0023] Furthermore, it also includes a sliding mechanism, which includes a slide seat 2 horizontally slidably mounted on the bracket 1 and a driving mechanism for driving the slide seat to slide horizontally and reciprocatingly, the sliding direction of the slide seat 2 is parallel to the axis of the friction roller 53, and the friction mechanism 5 is installed on the slide seat 2.

[0024] Furthermore, it also includes a push rod assembly 4 for lifting the movable arm 34 and making it leave the detection station and enter the pause station to pause the detection. The push rod assembly 4 includes a driving rod rotatably mounted on the bracket 1 and parallel to the main axis. The driving rod is provided with a cam 44 that can contact the bottom surface of the movable arm, and the end of the driving rod is provided with an operating handle 46 for driving it to rotate.

[0025] Furthermore, the push rod assembly 4 is arranged between the hinge point of the movable arm and the retaining frame.

[0026] Furthermore, the push rod assembly 4 is arranged on a side close to the retaining frame.

[0027] Furthermore, the angle between the detection station and the pause station of the movable arm is 5°-15°, or the height difference is 5mm-30mm.

[0028] Furthermore, the push rod assembly 4 includes a rod body 41, a key groove 410 is opened on the side wall of the rod body 41, and cams 44 are sleeved on the rod body 41, the number of which is the same as and one-to-one with the movable arms, and a key 42 is provided between the cam 44 and the rod body 41 to achieve radial limitation; a spacer sleeve 43 is provided between two adjacent cams 44 to achieve axial limitation, and there are two operating handles fixed at both ends of the rod body 41.

[0029] Furthermore, the side wall of the cam 44 is provided with a first arcuate surface 441, a second arcuate surface 442 and a transition surface 443 tangent to the first arcuate surface 441 and the second arcuate surface 442, the first arcuate surface 441 is coaxial with the rod body 41, the axis of the second arcuate surface 442 is eccentric to the axis of the rod body 41, the radius of the first arcuate surface 441 is 1.5 times the radius of the second arcuate surface 442, and the first arcuate surface 441 and the second arcuate surface 442 have the same central angle formed relative to their respective axes.

[0030] Furthermore, the central angle is 105°-107°.

[0031] Furthermore, the protruding height s1 of the second arc-shaped surface 442 is 21%-0.23% of the radius of the first arc-shaped surface 441 .

[0032] Furthermore, the clamping head 7 includes a main clamping block 72 and a secondary clamping block 71 which is detachably mounted at the front end of the main clamping block 72 by a connecting bolt 73, the rear end face of the secondary clamping block 71 and / or the front end face of the main clamping block 72 are provided with a vertically arranged strip groove 711 to form a clamping area for clamping the workpiece 8 to be inspected, the rear end of the main clamping block 72 is horizontally provided with a clamping block 721, and the upper and lower ends of the clamping block 721 are penetrated by a first connecting hole 7210; the front end of the movable arm 34 is provided with a mounting portion 343 for mounting the clamping head 7, the front end face of the mounting portion 343 is provided with a clamping groove 340 for axially inserting the clamping block 721, the mounting portion 343 is provided with a second connecting hole 3401 coaxial with the first connecting hole 7210, a bolt passes through the second connecting hole and the first connecting hole in sequence from top to bottom and fixes the clamping head on the movable arm.

[0033] Furthermore, a first positioning pin parallel to the length direction of the movable arm is provided in the slot 340 , and a first positioning hole 211 capable of accommodating the insertion of the first positioning pin and realizing position limiting is provided at the rear end of the block 721 .

[0034] Furthermore, at least two groups of second positioning holes 712 and second positioning pins 722 for positioning are provided between the front end surface of the main clamping block 72 and the rear end surface of the auxiliary clamping block 71 .

[0035] Furthermore, when in the detection station, the distance from the contact point of the workpiece to be detected to the center of gravity of the movable arm is L1, the distance from the hinge point of the movable arm to its center of gravity is L2, and 1≤L1 / L2≤1.1.

[0036] Furthermore, 1.05≤L1 / L2≤1.06.

[0037] Furthermore, the weight F of the counterweight block is 9kg-10KG.

[0038] Furthermore, when the workpiece to be inspected is in the inspection position, the load force F 载 It is 4.5kgf-4.7kgf.

[0039] Furthermore, the load force F 载 It is 4.60kgf-4.63kgf.

[0040] Furthermore, the diameter of the friction roller is 180 mm-220 mm, and the linear speed thereof is 2800 mm / s-3400 mm / s.

[0041] Furthermore, the axial movement speed of the friction roller is 5 mm / s-20 mm / s.

[0042] Furthermore, the counterweight block includes an upper counterweight block 341 detachably mounted above the movable arm 34 and a lower counterweight block 342 detachably mounted below the movable arm 34, and the overall center of gravity is located on the movable arm 34.

[0043] Beneficial Effects

[0044] The wear test device of the present invention adopts a multi-movable arm structure, which can perform wear tests on multiple samples at the same time. Each movable arm can be adjusted and operated independently, which improves the flexibility and efficiency of the test; the independence of the movable arms ensures that during the test, personalized test settings can be made according to the characteristics of different samples, so as to obtain more accurate and reliable wear data; the friction roller can move axially and rotate radially, which can realize more complex wear mode simulation, so that the wear test device can simulate more wear environments under actual working conditions, thereby improving the accuracy of the test; the arrangement of the retaining frame can improve the structural strength of the movable arm, avoid deflection during the wear test, improve its operating reliability and stability, ensure the accuracy and consistency of the test results, and at the same time, perform bearing test on the end of the movable arm. The workpiece is protected from deflection or damage due to force; a push rod assembly is provided to lift the movable arm through a cam to achieve rapid or short-term separation of the workpiece from the friction roller, thereby reducing unnecessary wear and allowing accurate control of the contact time between the workpiece and the roller, and the operation is convenient, labor-saving and safe; the push rod assembly can realize synchronous lifting control of each movable arm to ensure the consistency of the friction test time of each workpiece and improve the test accuracy; a cooling mechanism is provided to cool the friction point, maintain the stability of the test environment, avoid the influence of excessive temperature on the accuracy of the test, and thus improve the detection accuracy and precision; the wear testing device of the present invention can test multiple or multiple groups of samples at the same time, has high test flexibility and efficiency, and good test accuracy and precision, and is easy to operate and labor-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a structural schematic diagram of the wear testing device of the present invention;

[0046] Figure 2 It is a schematic structural diagram of the wear testing device of the present invention from another angle;

[0047] Figure 3 It is a schematic diagram of the installation of the friction mechanism of the wear testing device of the present invention;

[0048] Figure 4 It is a schematic diagram of the installation of the retainer of the wear testing device of the present invention;

[0049] Figure 5 A schematic diagram of another angle installation of the retainer of the wear testing device of the present invention;

[0050] Figure 6 It is a schematic diagram of the installation of the movable arm of the wear testing device of the present invention;

[0051] Figure 7 is a cross-sectional view of the friction mechanism of the wear testing device of the present invention;

[0052] Figure 8 It is a schematic diagram of the exploded structure of the friction mechanism of the wear testing device of the present invention;

[0053] Fig. 9 for Figure 8 Enlarged view of part A in the middle;

[0054] Fig.10 It is a schematic structural diagram of a clamping head of a wear testing device of the present invention;

[0055] Fig.11 It is a schematic diagram of the structure of the clamping head of the wear testing device of the present invention from another angle;

[0056] Fig.12 It is a schematic diagram of the exploded structure of the clamping head of the wear testing device of the present invention;

[0057] Fig.13 It is a schematic diagram of the exploded structure of the clamping head of the wear testing device of the present invention from another angle;

[0058] Fig.14 It is a schematic diagram of the exploded structure of the push rod assembly of the wear testing device of the present invention;

[0059] Fig.15 is a cross-sectional view of a push rod assembly of a wear testing device of the present invention;

[0060] Fig.16 is a cross-sectional view of a cam of the wear testing device of the present invention;

[0061] Fig.17 It is a center of gravity configuration diagram of the movable arm of the wear testing device of the present invention;

[0062] Fig.18 It is a force analysis diagram of the movable arm of the wear testing device of the present invention. DETAILED DESCRIPTION

[0063] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0064] See also Figure 1-Figure 18The present invention provides a wear testing device for detecting the wear resistance of a workpiece after spraying, which includes a bracket 1, a friction mechanism 5 and a clamping mechanism 3.

[0065] Among them, the bracket 1 is used as a mounting carrier to install the friction mechanism 5 and the clamping mechanism 3 to form a whole to ensure the stable operation of each component. The bracket 1 is made of high-strength steel and has a stable structure to ensure no shaking during the test. In order to ensure its levelness, an adjusting bolt is provided at the bottom of the bracket 1 to accurately adjust the level of the bracket. The bracket 1 has a first mounting platform 11 and a second mounting platform 12, and the height of the second mounting platform 12 is higher than that of the first mounting platform 11, wherein the first mounting platform is used to install the friction mechanism 5, and the second mounting platform is used to install the clamping mechanism 3, and the clamping mechanism 3 is located above the friction mechanism 5. Specifically, a base plate 31 is fixed on the second mounting platform 12, and a plurality of mounting holes are opened on the base plate for installing the clamping mechanism 3, the push rod assembly and the retaining frame.

[0066] In order to improve the diversity of wear tests and meet different simulation scenarios, the present application also includes a sliding mechanism, which includes a slide seat 2 horizontally slidably mounted on the bracket 1. Specifically, a slide rail 211 and a slider 111 are provided on the first mounting platform 11 to form a sliding assembly. The slide seat 2 is fixed on the sliding assembly and can achieve horizontal sliding, and its sliding direction is parallel to the axis of the friction roller 53. At the same time, a limit device is provided in the sliding stroke of the slide seat 2 to ensure that the sliding assembly moves within a predetermined range. A driving mechanism is provided on the bracket 1, and the driving mechanism is connected to the slide seat 2 to drive the slide seat to slide horizontally reciprocatingly to achieve axial movement of the friction roller. According to different rotation speeds and axial movement speeds, different friction directions of the workpiece can be simulated to meet different test requirements and make the wear test more comprehensive and accurate.

[0067] The friction mechanism 5 includes a friction roller 53, a driving motor 51 and a transmission device 52. The friction roller 53 is rotatably mounted on the first mounting platform 11 through the first mounting seat 22, and is arranged horizontally; the driving motor 51 is fixed to the second mounting platform 11 through the motor seat 23, and is located on one side of the friction roller 53. It is coaxially arranged with the friction roller 53 and is connected to the friction roller 53 through the transmission device 52, which is used to drive the friction roller to rotate. The transmission device 52 is a coupling to ensure stable and efficient power transmission; the surface of the friction roller 53 is covered with gauze or sandpaper to simulate the actual wear environment and ensure the accuracy of the test results.

[0068] In the present application, the diameter of the friction roller is 180 mm-220 mm, and its linear speed is 2800 mm / s-3400 mm / s. Meanwhile, the axial moving speed of the friction roller is 5 mm / s-20 mm / s.

[0069] The clamping mechanism 3 is mounted on the second mounting platform 12, and includes a main shaft 35 and a movable arm 34. The main shaft 35 is fixed to the second mounting platform 12 through a second mounting seat 322, and its axis is parallel to the axis of the friction roller 53. One end of the movable arm 34 is hinged on the main shaft 35 through a bearing, and it can rotate, and the rotation axis is parallel to the axis of the friction roller 53. In the present application, there are multiple movable arms 34, which are evenly distributed along the main shaft 35, preferably 4-8. The cross-section of the movable arm 34 is rectangular, and its height direction is greater than the thickness direction. The other end of each movable arm 34 is provided with a clamping head 7, which The head 7 is used as a fixture to clamp the workpiece 8 to be tested. A counterweight is provided on the movable arm 34. The movable arm can make the lower end of the workpiece 8 to be tested close to the surface of the friction roller 53 to ensure uniform force and realize the wear test of the workpiece to be tested. A wear-resistant coating is sprayed on the surface of the workpiece 8 to be tested, that is, a coating whose wear resistance needs to be tested. In order to improve the test accuracy and flexibility, multiple test workpieces 8 can be tested at the same time, and multiple groups of different coating thicknesses can be used, each group can be 1-2, thereby improving the test efficiency, ensuring that the data is comprehensive and reliable, and facilitating the comparative analysis of the wear resistance of different coatings or different thicknesses.

[0070] In the present application, the counterweight block includes an upper counterweight block 341 detachably mounted above the movable arm 34 and a lower counterweight block 342 detachably mounted below the movable arm 34, which can make the center of gravity of the whole (movable arm and counterweight block) be located on the movable arm 34. In the present application, the lower counterweight block 342 is cylindrical, with a bolt body on the top, and a screw hole is opened at the lower end of the movable arm for installing the lower counterweight block.

[0071] Specifically, the tail of the movable arm 34 is hinged on the main shaft 35 through a bearing and can be rotated. The two rotation limit positions of the movable arm 34 respectively form a detection position and a stop position. When the movable arm 34 rotates to the detection position, the lower end of the workpiece 8 to be detected on the clamping head 7 is in contact with the surface of the friction roller 53, and wear detection can be performed; when the movable arm 34 rotates (turns over) to the stop position, the workpiece 8 to be detected is detached and away from the friction roller. At this time, the clamping head or the workpiece to be detected can be replaced; in this embodiment, when the lower end of the workpiece 8 to be detected is in contact with the surface of the friction roller 53, that is, in the detection position, the angle between the movable arm 34 and the horizontal plane is less than or equal to 3°, preferably, 0 degrees, that is, at this time the movable arm 34 is parallel to the horizontal plane, ensuring that the workpiece is completely in contact with the roller surface and maximizing the friction contact area. At this time, the detection workpiece 8 is in contact with the top end of the friction roller, the friction force is evenly distributed, and it is in a horizontal state, which is conducive to calculating the load force on the detection workpiece 8 and improving the detection efficiency. The accuracy of the test results; the design of the movable arm 34 ensures that the stress state of the workpiece 8 is stable during the detection process, avoids the test error caused by angle deviation, and further improves the reliability of the experimental data; when the movable arm 34 rotates to the stop position, the clamping head 7 is located on the side away from the friction roller 53, and at this time, under the action of gravity, there is no movement tendency to approach the friction roller, that is, the movable arm is flipped to the other end, so that it has a movement tendency away from the friction roller, which improves the compactness of the structure, does not require other auxiliary devices, and is convenient and labor-saving to operate; in this embodiment, the angle between the detection station and the stop station is greater than or equal to 150 degrees and less than or equal to 180 degrees, that is, when the movable arm is in the stop position, it flips to the other end, and the angle between it and the horizontal plane is 0°-30°, which is convenient for the clamping head at the end of the movable arm or the detection workpiece 8 to be replaced; the flipping design of the movable arm 34 not only simplifies the operation process, but also reduces the equipment maintenance cost, improves the overall test efficiency, and has high safety in use.

[0072] The clamping head 7 comprises a main clamping block 72 and an auxiliary clamping block 71. The auxiliary clamping block 71 is detachably mounted on the front end of the main clamping block 72 by means of a connecting bolt 73. A vertically arranged strip groove 711 is provided on the rear end surface of the auxiliary clamping block 71 and / or on the front end surface of the main clamping block 72, which forms a clamping area for clamping the workpiece 8 to be inspected. A clamping block 721 is horizontally arranged at the rear end of the main clamping block 72. A first connecting hole 7210 is penetrated through the upper and lower ends of the clamping block 721. At the same time, a mounting portion 343 is provided at the front end of the movable arm 34, which is used to mount the clamping head 7. The mounting portion 343 is triangular or trapezoidal. A clamping groove 340 is provided on the front end surface of the mounting portion 343, which can accommodate the axial insertion of the clamping block 721. A second connecting hole 3401 coaxial with the first connecting hole 7210 is provided on the mounting portion 343. During assembly, the bolt passes through the second connecting hole and the first connecting hole in sequence from top to bottom. The clamping head is then fixed on the movable arm; in order to improve the installation accuracy of the clamping head and avoid its slight swing, a first positioning pin is provided in the slot 340, and the first positioning pin is parallel to the length direction of the movable arm. At the same time, a first positioning hole 7211 corresponding to the first positioning pin 74 is provided at the rear end of the clamping block 721. During assembly, the first positioning pin 74 is inserted into the first positioning hole and limited, which can improve the installation accuracy of the clamping head on the movable arm and avoid radial swing during the test process, thereby improving the overall operational reliability and stability; in order to achieve faster and more precise clamping, at least two groups of second positioning components are provided between the front end face of the main clamping block 72 and the rear end face of the auxiliary clamping block 71. The second positioning component includes a second positioning hole 712 and a second positioning pin 722 that cooperate with each other, which are used to achieve fast and accurate positioning and quick clamping.

[0073] When in the detection position, the distance from the contact point of the workpiece to be detected to the center of gravity of the movable arm is L1, the distance from the hinge point of the movable arm to the center of gravity of the movable arm is L2, and 1≤L1 / L2≤1.1, preferably, 1.05≤L1 / L2≤1.06, and the total weight F of the counterweight block is 9kg-10KG; in this embodiment, when in the detection position, the load force F on the workpiece to be detected is 载 4.5kgf-4.7kgf, preferably, the load force F 载 It is 4.60kgf-4.63kgf.

[0074] In order to improve the position accuracy of the main shaft 35, a first positioning sleeve is sleeved on the main shaft 35. There are multiple first positioning sleeves, which are arranged between two adjacent movable arms 34 for radial positioning of the movable arms 34, thereby improving the installation accuracy and facilitating quick installation.

[0075] In order to improve the radial stiffness of the movable arm during testing and avoid its left and right swing, especially radial swing during the axial movement of the friction roller, in the present application, a retaining frame 33 is provided on the bracket 1, specifically, it is installed on the second mounting platform 12 of the bracket, and the retaining frame 33 is provided with a receiving groove 330 with an open upper end, and the number of the receiving grooves 330 is the same as that of the movable arm 34 and they correspond one to one, and are used to accommodate the movable arm in the detection station, and the movable arm can rotate around the main axis, and the distance between its side wall and the inner wall of the receiving groove 330 is small, which is less than or equal to 1mm, thereby avoiding its radial swing, improving the position accuracy during the detection process, and protecting the movable arm at the same time, avoiding the bearing from being damaged by a large force arm, and improving the service life; in this embodiment, the retaining frame 33 is arranged between the hinge point of the movable arm 34 and the counterweight block, and preferably, the distance between the retaining frame 33 and the hinge point of the movable arm 34 is 1 / 4-1 / 3 of the distance between the hinge point of the movable arm and the clamping head.

[0076] In order to achieve the rapid or short separation of the fast workpiece from the friction roller, in the present application, a push rod assembly 4 is also provided, which is used to lift the movable arm 34, so that it can be separated from the detection station and enter the pause station, and then suspend the detection. The push rod assembly 4 includes a driving rod rotatably mounted on the second mounting platform 12 of the bracket 1. Specifically, a third mounting seat 321 is mounted on the second mounting platform 12, and the driving rod is rotatably mounted on the third mounting seat 321. The driving rod is parallel to the driving rod of the main shaft. A cam 44 is provided on the driving rod. The cam can contact the bottom surface of the movable arm, and then lift the movable arm, rotate it, and tilt the head of the movable arm, and then separate from the friction roller. An operating handle 46 is provided at the end of the driving rod for driving its rotation; in the present application, the push rod assembly 4 is arranged between the hinge point of the movable arm and the retaining frame, and the push rod assembly 4 is arranged on the side close to the retaining frame. In this embodiment, the angle between the detection station and the pause station of the movable arm is 5°-15°, or the height difference is 5mm-30mm. The above design ensures that the ejector assembly 4 can quickly complete the workpiece disengagement action with a relatively small force, thereby ensuring the efficiency and safety of the detection process.

[0077] The push rod assembly 4 includes a rod body 41, a key groove 410 is formed on the side wall of the rod body 41, and cams 44 are sleeved on the rod body 41, the number of which is the same as that of the movable arms and which correspond one to one. A key 42 is provided between the cam 44 and the rod body 41 to achieve radial limitation; a spacer 43 is provided between two adjacent cams 44 to achieve axial limitation of the cam; there are two operating handles fixed at both ends of the rod body 41, which can be operated at both ends, thereby improving the convenience of use and operation; a retaining spring 45 is provided on one side of the cam 44 at the end, which can achieve axial fixation of the cam and is easy to load and unload.

[0078] The side wall of the cam 44 is provided with a first arc surface 441, a second arc surface 442 and a transition surface 443, the transition surface is provided between the first arc surface 441 and the second arc surface 442, and the two are tangent, the first arc surface 441 is coaxial with the rod body 41, and the axis of the second arc surface 442 is eccentric to the axis of the rod body 41, wherein the radius of the first arc surface 441 is 1.5 times the radius of the second arc surface 442, and at the same time, the convex height s1 of the second arc surface 442 is 21%-0.23% of the radius of the first arc surface 441, and the first arc surface 441 is coaxial with the rod body 41, and the axis of the second arc surface 442 is eccentric to the axis of the rod body 41, wherein the radius of the first arc surface 441 is 1.5 times the radius of the second arc surface 442, and the convex height s1 of the second arc surface 442 is 21%-0.23% of the radius of the first arc surface 441, and the first arc surface 441 is coaxial with the rod body 41, and the second arc surface 442 is coaxial with the rod body ... The center angles formed by the surface 441 and the second arc surface 442 relative to their respective axes are the same, that is, the angles formed by the two ends of the first arc surface 441 relative to its own axis are α (center angle), and the angles formed by the two ends of the second arc surface 442 relative to its own axis are β (center angle), and α=β. Preferably, the center angle is 105°-107°. This design ensures that the cam can smoothly push the push rod assembly 4 to the predetermined disengagement position during the rotation process, while avoiding jamming and abnormal noise during the movement. Through this structural optimization, the entire detection system not only ensures work efficiency, but also greatly improves the stability and reliability of operation.

[0079] In order to avoid the temperature rise caused by friction affecting the accuracy of detection, in this embodiment, a cooling mechanism 6 is also provided. The cooling mechanism 6 includes the same number of coolant nozzles 61 as the movable arm 34. The coolant nozzles 61 face the contact point between the friction roller 53 and the workpiece to be detected. A liquid collecting tank is provided at the lower end of the friction roller 53 to collect the coolant on the friction roller to form recycling and avoid splashing. At the same time, a liquid storage tank and a circulation pump are provided. The liquid outlet end of the circulation pump is connected to each nozzle through a pipeline, and its liquid inlet end is connected to the liquid storage tank. At the same time, the liquid collection tank is connected to the liquid storage tank after being filtered by a filter, ensuring the recycling of the coolant, which is both environmentally friendly and economical. In addition, a temperature sensor is also provided in the liquid storage tank to monitor the temperature of the coolant in real time, and the set temperature range is maintained by controlling the working state of the circulation pump, further ensuring the stable operation and detection accuracy of the detection system.

[0080] At the same time, the present application is equipped with a control system that can accurately control the rotation speed of the friction roller and can automatically adjust to meet different testing requirements. The control system includes a central processor that receives data from various sensors, such as temperature, pressure and speed, and adjusts the rotation speed of the friction roller in real time after algorithm analysis to ensure the accuracy of the test results. In addition, the system also includes a user-friendly operating interface that allows operators to quickly set parameters and perform manual intervention as needed, thereby improving the flexibility of the testing process. The control system is also connected to a remote monitoring platform, allowing engineers to remotely access test data and provide technical support during the testing process, which not only enhances the practicality of the system, but also ensures rapid response and problem solving in complex situations; through real-time monitoring and intelligent adjustment, the detection system can minimize downtime, improve production efficiency and product consistency.

[0081] The wear test device of the present invention adopts a multi-movable arm structure, which can perform wear tests on multiple samples at the same time. Each movable arm can be adjusted and operated independently, which improves the flexibility and efficiency of the test; the independence of the movable arms ensures that during the test, personalized test settings can be made according to the characteristics of different samples, so as to obtain more accurate and reliable wear data; the friction roller can move axially and rotate radially, which can realize more complex wear mode simulation, so that the wear test device can simulate more wear environments under actual working conditions, thereby improving the accuracy of the test; the arrangement of the retaining frame can improve the structural strength of the movable arm, avoid deflection during the wear test, improve its operating reliability and stability, ensure the accuracy and consistency of the test results, and at the same time, perform bearing test on the end of the movable arm. The workpiece is protected from deflection or damage due to force; a push rod assembly is provided to lift the movable arm through a cam to achieve rapid or short-term separation of the workpiece from the friction roller, thereby reducing unnecessary wear and allowing accurate control of the contact time between the workpiece and the roller, and the operation is convenient, labor-saving and safe; the push rod assembly can realize synchronous lifting control of each movable arm to ensure the consistency of the friction test time of each workpiece and improve the test accuracy; a cooling mechanism is provided to cool the friction point, maintain the stability of the test environment, avoid the influence of excessive temperature on the accuracy of the test, and thus improve the detection accuracy and precision; the wear testing device of the present invention can test multiple or multiple groups of samples at the same time, has high test flexibility and efficiency, and good test accuracy and precision, and is easy to operate and labor-saving.

[0082] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A wear testing device, characterized in that: include: Bracket 1, serving as a mounting carrier; The friction mechanism 5 comprises a friction roller 53 rotatably mounted on the bracket 1 and a driving motor 51 for driving the friction roller 53 to rotate, wherein the rotation axis of the friction roller 53 is parallel to the horizontal plane; The clamping mechanism 3 includes a main shaft 35 fixed on the bracket 1 and parallel to the friction roller 53 and a plurality of movable arms 34 hinged on the main shaft 35, the movable arm 34 is provided with a counterweight block, and the head of the movable arm 34 is provided with a clamping head 7 for clamping the workpiece 8 to be tested and making it fit on the surface of the friction roller 53 for wear testing.

2. The wear testing device according to claim 1, characterized in that: The tail of the movable arm 34 is hinged on the main shaft 35 through a bearing and can be rotated. The rotation limit positions of the movable arm 34 respectively form a detection position and a stop position. When the movable arm 34 rotates to the detection position, the lower end of the workpiece 8 to be detected on the clamping head 7 is in contact with the surface of the friction roller 53; when the movable arm 34 rotates to the stop position, the workpiece 8 to be detected is detached from and away from the friction roller, and can be used to replace the clamping head or the workpiece to be detected.

3. The wear testing device according to claim 1, characterized in that: When the movable arm 34 rotates to the stop position, the clamping head 7 is located at a side away from the friction roller 53 and has a tendency to move away from the friction roller under the action of gravity.

4. The wear testing device according to claim 1, characterized in that: When the workpiece 8 to be inspected contacts the surface of the friction roller 53 , the angle between the movable arm 34 and the horizontal plane is less than or equal to 3°.

5. The wear testing device according to claim 1, characterized in that: The bracket 1 is provided with a retaining frame 33, and the retaining frame 33 is provided with a receiving groove 330 with an open upper end. The receiving grooves 330 are the same in number and correspond one to one with the movable arms 34, and are used to accommodate the movable arms at the detection station and prevent their radial swing.

6. The wear testing device according to claim 1, characterized in that: It also includes a cooling mechanism 6, which includes coolant nozzles 61 with the same number as the movable arms 34, and the coolant nozzles 61 are directed toward the contact points between the friction roller 53 and the workpiece to be inspected. The lower end of the friction roller 53 is provided with a liquid collecting tank for collecting the coolant on the friction roller.

7. The wear testing device according to claim 1, characterized in that: It also includes a sliding mechanism, which includes a slide seat 2 horizontally slidably mounted on the bracket 1 and a driving mechanism for driving the slide seat to slide horizontally and reciprocatingly. The sliding direction of the slide seat 2 is parallel to the axis of the friction roller 53, and the friction mechanism 5 is installed on the slide seat 2.

8. The wear testing device according to claim 1, characterized in that: It also includes a push rod assembly 4 for lifting the movable arm 34 and making it leave the detection position and enter the pause position to pause the detection. The push rod assembly 4 includes a driving rod rotatably mounted on the bracket 1 and parallel to the main axis. The driving rod is provided with a cam 44 that can contact the bottom surface of the movable arm, and the end of the driving rod is provided with an operating handle 46 for driving it to rotate.

9. The wear testing device according to claim 1, characterized in that: The side wall of the cam 44 is provided with a first arcuate surface 441, a second arcuate surface 442 and a transition surface 443 tangent to the first arcuate surface 441 and the second arcuate surface 442. The first arcuate surface 441 is coaxial with the rod body 41, the axis of the second arcuate surface 442 is eccentric to the axis of the rod body 41, the radius of the first arcuate surface 441 is 1.5 times the radius of the second arcuate surface 442, and the central angles formed by the first arcuate surface 441 and the second arcuate surface 442 relative to their respective axes are the same.

10. The wear testing device according to claim 1, characterized in that: When in the detection position, the distance from the contact point of the workpiece to be detected to the center of gravity of the movable arm is L1, the distance from the hinge point of the movable arm to its center of gravity is L2, and 1≤L1 / L2≤1.1.

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