A combined friction and wear testing device

Abstract

The present invention belongs to the field of metal plastic forming technology and equipment, and in particular, relates to a combined friction and wear testing device. The combined friction and wear testing device includes: a positioning structure, including a flatly arranged fixed plate; a clamping structure, including two clamping seats arranged opposite to each other, both clamping seats are connected to the same side plate surface of the fixed plate, and together form a clamping groove capable of clamping a workpiece; and a force-applying structure, including a lateral force-applying component capable of applying a first force in a horizontal direction and a longitudinal force-applying component capable of applying a second force in a vertical direction; wherein one of the clamping seats horizontally slides on the fixed plate and applies a first force of a predetermined value, and presses the workpiece toward the other clamping seat; the second force has a predetermined value and is applied to the workpiece, and drives the workpiece to move in a vertical direction. The present invention can test the friction coefficient of a workpiece and simplify its structure.

Description

Technical Field

[0001] The invention belongs to the field of metal plastic forming technology equipment, and in particular relates to a combined friction and wear testing device. Background Art

[0002] At present, during the stamping process, the friction between the sheet metal and the die is an important influencing factor of sheet metal forming, damage and wear of formed parts and dies. Studying the friction and wear between the sheet metal and the die is of great significance to improving the quality of sheet metal stamping. Therefore, it is necessary to design a reasonable experimental test device to study the friction between materials.

[0003] In sheet metal forming, especially cold forming, the mold and workpiece surface are prone to wear and adhesion, which seriously affects the quality of the finished product. Mastering the wear law of materials and predicting the wear characteristics of materials under different working conditions can improve the processing technology, control friction, reduce wear, and improve lubrication performance, which can save energy and raw materials, shorten the maintenance time of equipment and extend its service life. In addition, with the development of ultrasonic vibration-assisted technology, more and more research is being done on ultrasonic-assisted stamping.

[0004] However, currently commonly used experimental devices include traditional friction test devices, lath tensile test devices, drawbead test devices, U-shaped bending test devices, torsion devices and wear testers. These friction and wear test devices have complex structures and are relatively expensive. Summary of the invention

[0005] The purpose of the embodiments of the present application is to provide a combined friction and wear testing device, aiming to solve the problem of how to test the friction coefficient of a workpiece under predetermined conditions and simplify the structure of the combined friction and wear testing device.

[0006] To achieve the above purpose, the technical solution adopted in this application is:

[0007] A combined friction and wear testing device is provided, comprising:

[0008] A positioning structure, including a fixing plate arranged flat;

[0009] A clamping structure, comprising two clamping seats arranged opposite to each other, both of which are connected to the same side plate surface of the fixing plate and together form a clamping groove capable of clamping a workpiece; and

[0010] The force applying structure comprises a lateral force applying component capable of applying a first force in a horizontal direction and a longitudinal force applying component capable of applying a second force in a vertical direction;

[0011] Among them, one of the clamping seats horizontally slides into the fixed plate and applies the first force with a predetermined value, and presses the workpiece toward the other clamping seat; the second force has a predetermined value and is applied to the workpiece, and drives the workpiece to move in the vertical direction.

[0012] In some embodiments, the lateral force application assembly includes a locking member connected to the fixed plate and an elastic member having elastic restoring force and abutting against the corresponding clamping seat, the elastic member can produce a predetermined amount of compression deformation, and the locking member is used to keep the elastic member compressed and deformed.

[0013] In some embodiments, the locking member includes a locking plate arranged relative to the clamping seat, a locking seat connected to the fixed plate, and an adjusting rod with one end slidably connected to the locking seat, the two ends of the elastic member respectively abut the clamping seat and the locking plate, the other end of the adjusting rod abuts the locking plate and slides a predetermined distance relative to the locking seat to adjust the distance between the locking plate and the clamping seat.

[0014] In some embodiments, the elastic member is a tube spring, and the positioning structure further includes a transverse guide rod, one end of which is connected to the locking member, and the other end of which is sleeved inside the tube spring and connected to the corresponding clamping seat.

[0015] In some embodiments, each of the clamping seats is provided with a guide hole, and one end of the transverse guide rod extends and is located in the two guide holes.

[0016] In some embodiments, the clamping seat includes a seat body slidably connected to the fixing plate and a mold insert detachably connected to the seat body, and the two mold inserts are arranged opposite to each other and can clamp the workpiece.

[0017] In some embodiments, the mold insert is provided with a heating hole, and the combined friction and wear testing device further comprises a heating rod disposed in the heating hole and used for heating the workpiece.

[0018] In some embodiments, the positioning structure also includes a limit assembly connected to the clamping seat, the limit assembly includes a limit plate having a predetermined distance from the clamping seat and a connecting member connecting the limit plate and the clamping seat; each of the clamping seats is connected to the limit assembly.

[0019] In some embodiments, the combined friction and wear testing device further includes an ultrasonic vibration structure and a support frame connecting the ultrasonic vibration structure and the fixing plate.

[0020] In some embodiments, the two clamping seats are horizontally slidably connected to the fixed plate, the fixed plate is provided with an avoidance groove at a position corresponding to the clamping groove, the groove walls on both sides of the avoidance groove are provided with sliding grooves, and the two ends of the clamping seat are respectively slidably arranged in the two sliding grooves; the positioning structure also includes a positioning member, which is used to fix the two clamping seats to the fixed plate, and the second force is applied upward to the workpiece.

[0021] The beneficial effects of the present application are that the combined friction and wear testing device includes a positioning structure, a clamping structure and a force-applying structure. By connecting both clamping seats to a fixed plate, and at least one of the clamping seats is slidably connected to the fixed plate, a lateral force-applying component applies a first force to the clamping seat, and a vertical force-applying component applies a second force to the workpiece, thereby being able to test and analyze the friction coefficient of the workpiece under predetermined conditions, and the combined friction and wear testing device has a simple structure and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or exemplary technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the combined friction and wear testing device provided in an embodiment of the present application;

[0024] Figure 2 yes Figure 1 An exploded schematic diagram of a combined friction and wear testing device;

[0025] Figure 3 yes Figure 2 An exploded schematic diagram of a clamping seat;

[0026] Figure 4 yes Figure 1 Schematic diagram of the front view of the combined friction and wear testing device.

[0027] Among them, the reference numerals in the figure are:

[0028] 100. Combined friction and wear testing device; 101. Ultrasonic vibration structure; 102. Support frame; 10. Positioning structure; 11. Fixing plate; 12. Positioning member; 121. Positioning bolt; 122. Positioning seat; 20. Clamping structure; 21. Clamping seat; 211. Seat body; 212. Mold insert; 213. Heating rod; 214. Positioning groove; 200. Workpiece; 30. Force structure; 31. Horizontal force component; 314. Locking member; 311. Locking seat; 312. Adjusting rod; 313. Locking plate; 315. Elastic member; 32. Vertical force component; 111. Avoidance groove; 112. Slide; 126. Threaded positioning hole; 23. Clamping groove; 316. Scale ruler; 40. Limiting component; 41. Connecting member; 42. Press plate; 13. Horizontal guide rod; 214. Guide hole; DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present application.

[0030] It should be noted that when a component is referred to as being "fixed on" or "disposed on" another component, it may be directly on the other component or indirectly on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances. The terms "first" and "second" are only used for the purpose of convenience of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0031] See also Figures 1 to 3 The embodiment of the present application provides a combined friction and wear testing device 100, which includes a positioning structure 10, a clamping structure 20 and a force-applying structure 30. It can be understood that the combined friction and wear testing device 100 provided in this embodiment can test the friction coefficient of the workpiece 200 under predetermined conditions, as well as the wear condition, and improve the cold stamping process by analyzing the friction and wear condition to improve the quality of sheet metal stamping. Optionally, in this embodiment, the workpiece 200 is a sheet metal with a predetermined thickness and a predetermined weight.

[0032] See also Figures 1 to 3 Optionally, the positioning structure 10 includes a flatly arranged fixing plate 11, the fixing plate 11 may be made of a metal material and have a certain structural strength, and the fixing plate 11 is flatly arranged so as to have an upper surface and a lower surface.

[0033] See also Figures 1 to 3 Optionally, the clamping structure 20 includes two clamping seats 21 arranged opposite to each other, and the two clamping seats 21 are connected to the same side plate surface of the fixed plate 11, and together form a clamping groove 23 capable of clamping the workpiece 200. In this embodiment, the two clamping seats 21 are connected to the lower plate surface of the fixed plate 11, and the clamping groove 23 is located below the fixed plate 11. At least one of the two clamping seats 21 is horizontally slidably connected to the fixed plate 11, and the other clamping seat 21 is fixedly connected to the fixed plate 11; or the two clamping seats 21 are horizontally slidably connected to the lower plate surface of the fixed plate 11, and the two clamping seats 21 can slide horizontally along the lower surface of the fixed plate 11, and one of the clamping seats 21 is fixedly connected to the fixed plate 11 through a structural member. It can be understood that under the action of external force, the two clamping seats 21 can horizontally clamp the workpiece 200 located between the two clamping seats 21.

[0034] Optionally, the force-applying structure 30 includes a lateral force-applying component 31 capable of applying a first force in the horizontal direction and a longitudinal force-applying component capable of applying a second force in the vertical direction; one of the clamping seats 21 horizontally slides in contact with the fixed plate 11 and applies the first force of a predetermined value, and presses the workpiece 200 toward the other clamping seat 21, while the other clamping seat 21 is fixedly connected to the fixed plate 11; the second force has a predetermined value and is applied to the workpiece 200, and drives the workpiece 200 to move in the vertical direction. Optionally, the vertical force-applying component 32 can be a universal tensile testing machine, which can apply a second force to the workpiece 200 and record the magnitude of the second force in real time. It can be understood that in this embodiment, since the mass of the workpiece 200 is relatively small, the influence of the mass of the workpiece 200 can be ignored when performing the friction coefficient analysis.

[0035] Optionally, the first force is recorded as F1 and the second force is recorded as F2. According to the friction principle, the two side surfaces of the workpiece 200 are respectively subjected to the friction force of the two clamping seats 21, wherein the friction force is recorded as f and the friction coefficient between the workpiece 200 and the clamping seat 21 is recorded as μ.

[0036] According to the calculation formula of friction force: f=F1*μ, 2f=F2, μ=F2 / 2F1, the friction coefficient of the workpiece 200 can be tested and analyzed.

[0037] The combined friction and wear testing device 100 provided in this embodiment includes a positioning structure 10, a clamping structure 20 and a force-applying structure 30. By connecting both clamping seats 21 to the fixed plate 11, and at least one of the clamping seats 21 is slidably connected to the fixed plate 11, the lateral force-applying component 31 applies a first force to the clamping seat 21, and the vertical force-applying component 32 applies a second force to the workpiece 200, so that the friction coefficient of the workpiece 200 under predetermined conditions can be tested and analyzed, and the combined friction and wear testing device 100 has a simple structure and low cost.

[0038] It can be understood that, by sliding the clamping seat 21 , the width of the clamping groove 23 can be adjusted to accommodate workpieces 200 of different thicknesses.

[0039] Optionally, the direction of the first force and the direction of the second force can be found in Figure 4 shown.

[0040] See also Figures 1 to 3 In some embodiments, the lateral force-applying assembly 31 includes a locking member 314 connected to the fixing plate 11 and an elastic member 315 having an elastic restoring force and abutting against the corresponding clamping seat 21, wherein the elastic member 315 can produce a predetermined amount of compression deformation, and the locking member 314 is used to keep the elastic member 315 compressed and deformed.

[0041] Optionally, by causing the elastic member 315 to undergo elastic deformation of different magnitudes, it is possible to apply first forces of different magnitudes to the clamping seat 21, thereby testing the friction coefficient and wear of the workpiece 200 under different first forces. It is understandable that, according to the magnitude of the first force required to be applied by the clamping seat 21, the elastic member 315 undergoes a predetermined elastic deformation, the locking member 314 abuts against the elastic member 315 and allows the elastic member 315 to maintain the deformation, thereby applying a stable first force to the clamping seat 21.

[0042] See also Figures 1 to 3 In some embodiments, the locking member 314 includes a locking plate 313 arranged relative to the clamping seat 21, a locking seat 311 connected to the fixing plate 11, and an adjusting rod 312 with one end slidably connected to the locking seat 311. The two ends of the elastic member 315 respectively abut the clamping seat 21 and the locking plate 313. The other end of the adjusting rod 312 abuts the locking plate 313 and slides a predetermined distance relative to the locking seat 311 to adjust the distance between the locking plate 313 and the clamping seat 21.

[0043] See also Figures 1 to 3Optionally, the distance between the locking plate 313 and the clamping seat 21 is adapted to the elastic deformation required by the elastic member 315, that is, the distance between the locking plate 313 and the clamping seat 21 increases, and the elastic deformation of the elastic member 315 decreases; the distance between the locking plate 313 and the clamping seat 21 decreases, and the elastic deformation of the elastic member 315 increases. Optionally, the adjustment rod 312 is a bolt, and a threaded hole is provided on the locking seat 311. The external thread section of the adjustment rod 312 is screwed into the threaded hole, and by rotating the adjustment rod 312, the distance between the locking plate 313 and the clamping seat 21 can be adjusted, thereby adjusting the deformation of the elastic member 315.

[0044] Optionally, a scale ruler 316 is further provided on the clamping seat 21 , and the scale ruler 316 is used to measure and characterize the deformation amount of the elastic member 315 , so as to facilitate rapid acquisition of the deformation amount of the elastic member 315 .

[0045] It can be understood that a plurality of elastic members 315 can be provided, and the elastic members 315 are arranged at intervals.

[0046] See also Figures 1 to 3 In some embodiments, the elastic member 315 is a tube spring, and the positioning structure 10 further includes a transverse guide rod 13, one end of which is connected to the locking member 314, and the other end of which is sleeved inside the tube spring and connected to the corresponding clamping seat 21. Optionally, by providing the transverse guide rod 13, the positioning of the tube spring can be achieved, and the stability of the elastic deformation of the tube spring can be improved, as well as the accuracy of the first acting force can be improved.

[0047] Each tube spring is provided with a transverse guide rod 13, and each tube spring is respectively covered with a transverse guide rod 13.

[0048] See also Figures 1 to 3 In some embodiments, each of the clamping seats 21 is provided with a guide hole 214, and one end of the transverse guide rod 13 extends and is located in the two guide holes 214. It can be understood that the cooperation between the transverse guide rod 13 and the guide hole 214 can guide the clamping seat 21 to slide, thereby improving the convenience of sliding the clamping seat 21, and when the clamping seat 21 slides to just contact the workpiece 200, the elastic member 315 starts to apply the first force to the clamping seat 21 by rotating the adjustment rod 312.

[0049] See also Figures 1 to 3 In some embodiments, the clamping seat 21 includes a seat body 211 slidably connected to the fixing plate 11 and a mold insert 212 connected to the seat body 211 , and the two mold inserts 212 are arranged opposite to each other and can clamp the workpiece 200 .

[0050] Optionally, a positioning groove 214 is opened on the seat body 211, and the mold insert 212 is partially detachably connected to the positioning groove 214, and partially located in the clamping seat 21 and abuts the workpiece 200. By replacing different mold inserts 212, the friction coefficient and wear of the workpiece 200 under different materials can be tested and analyzed.

[0051] See also Figures 1 to 3 In some embodiments, the mold insert 212 is provided with a heating hole, and the combined friction and wear testing device 100 further includes a heating rod 213 disposed in the heating hole and used for heating the workpiece 200 .

[0052] Optionally, the friction coefficient and wear of the workpiece 200 and the mold insert 212 at different temperatures can be tested by heating the mold insert 212 with the workpiece 200. The heating rod 213 is an electric heating rod 213, which can heat the mold insert 212 to a predetermined temperature, thereby achieving friction and wear tests at different temperatures.

[0053] See also Figures 1 to 3 In some embodiments, the positioning structure 10 also includes a limiting assembly 40 connected to the clamping seat 21, and the limiting assembly 40 includes a limiting plate having a predetermined spacing with the clamping seat 21 and a connecting member 41 connecting the limiting plate and the clamping seat 21; each of the clamping seats 21 is connected to the limiting assembly 40.

[0054] See also Figures 1 to 3 Optionally, the two ends of the workpiece 200 are respectively pressed on the clamping seat 21 by two pressing plates 42, and the workpiece 200 crosses the clamping groove 23, so that the workpiece 200 can be subjected to a U-shaped stamping test to simulate the stamping of the workpiece 200 under different conditions. The connecting member 41 can also be a bolt, and a threaded hole can be opened on the lower surface of the seat body 211, and a through hole is opened on the pressing plate 42 at a position corresponding to the threaded hole, so that the pressing plate 42 can be screwed on the seat body 211 through the connecting member 41, and the two ends of the workpiece 200 are respectively pressed and positioned on the two seat bodies 211.

[0055] In some embodiments, the combined friction and wear testing device 100 further includes an ultrasonic vibration structure 101 and a support frame 102 connecting the ultrasonic vibration structure 101 and the fixing plate 11. One end of the support frame 102 is connected to the upper surface of the fixing plate 11, and the other end of the support frame 102 is connected to the ultrasonic vibration structure 101. The ultrasonic vibration structure 101 can generate ultrasonic vibration and transmit the ultrasonic vibration to the workpiece 200. Ultrasonic vibration is applied to the workpiece 200 or the mold insert 212, so that the combined friction and wear testing device 100 can perform relevant experimental measurements of friction force, friction coefficient, wear, and surface damage under ultrasonic vibration.

[0056] See also Figure 4 In some embodiments, the two clamping seats 21 are horizontally slidably connected to the fixed plate 11, and the fixed plate 11 is provided with an avoidance groove 111 at a position corresponding to the clamping groove 23, and the groove walls on both sides of the avoidance groove 111 are provided with sliding grooves 112, and the two ends of the clamping seat 21 are respectively slidably arranged on the two sliding grooves 112; the positioning structure 10 also includes a positioning member 12, and the positioning member 12 is used to fix the two clamping seats 21 to the fixed plate 11, and the second force is applied upward to the workpiece 200 to simulate U-shaped stamping of the workpiece 200.

[0057] Optionally, the positioning member 12 includes a positioning bolt 121 and a positioning seat 122 connected to one end of the fixing plate 11. A plurality of positioning bolts 121 may be provided, and a threaded positioning hole 126 communicating with the slide groove 112 is further provided on the upper plate surface of the fixing plate 11. Each seat body 211 is provided with at least one threaded positioning hole 126. In this embodiment, any seat body 211 is provided with four threaded positioning holes 126. The positioning bolt 121 is screwed into the threaded positioning hole 126 on the upper surface of the fixing plate 11 and abuts against the clamping seat 21 to limit the clamping seat 21 from sliding along the slide groove 112.

[0058] See also Figure 4 Optionally, one end of a positioning bolt 121 is threadedly connected to the positioning seat 122, and the other end of the positioning bolt 121 abuts the clamping seat 21, so that the corresponding clamping seat 21 can be restricted from moving in a direction away from the locking member 314 by the positioning bolt 121, and the corresponding clamping seat 21 can be driven to slide by rotating the positioning bolt 121.

[0059] Optionally, by adjusting the distance between the two clamping seats 21, or replacing the mold insert 212, simulation and testing of the surface damage / wear experiment of U-shaped parts stamping forming under different forming sizes, different mold materials, different sheet thicknesses, different temperatures, and different vibration conditions can be achieved.

[0060] The above are only optional embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A combined friction and wear testing device, characterized in that: include: A positioning structure, including a fixing plate arranged flat; The clamping structure comprises two clamping seats arranged opposite to each other, both of which are connected to the same side plate surface of the fixing plate and together form a clamping groove capable of clamping the workpiece; as well as The force-applying structure comprises a lateral force-applying component capable of applying a first force in a horizontal direction and a longitudinal force-applying component capable of applying a second force in a vertical direction; Wherein, one of the clamping seats horizontally slides on the fixing plate and applies the first force having a predetermined value, and presses the workpiece toward the other clamping seat; the second force has a predetermined value and is applied to the workpiece, and drives the workpiece to move in the vertical direction; The lateral force-applying assembly includes a locking member connected to the fixing plate and an elastic member having elastic restoring force and abutting against the corresponding clamping seat, the elastic member can produce a predetermined amount of compression deformation, and the locking member is used to keep the elastic member in compression deformation; The locking member comprises a locking plate arranged relative to the clamping seat, a locking seat connected to the fixing plate, and an adjusting rod with one end slidably connected to the locking seat, the two ends of the elastic member respectively abut against the clamping seat and the locking plate, the other end of the adjusting rod abuts against the locking plate and slides a predetermined distance relative to the locking seat to adjust the distance between the locking plate and the clamping seat; The clamping seat comprises a seat body slidably connected to the fixing plate and a mold insert detachably connected to the seat body, and the two mold inserts are arranged opposite to each other and can clamp the workpiece; The positioning structure further comprises a limiting assembly connected to the clamping seat, wherein the limiting assembly comprises a limiting plate having a predetermined spacing with the clamping seat and a connecting member connecting the limiting plate and the clamping seat; each of the clamping seats is connected to the limiting assembly; The combined friction and wear testing device also includes an ultrasonic vibration structure and a support frame connecting the ultrasonic vibration structure and the fixing plate; The two clamping seats are horizontally slidably connected to the fixed plate, the fixed plate is provided with an avoidance groove at the position corresponding to the clamping groove, the groove walls on both sides of the avoidance groove are provided with sliding grooves, and the two ends of the clamping seat are respectively slidably arranged in the two sliding grooves; the positioning structure also includes a positioning member, which is used to fix the two clamping seats to the fixed plate, and the second force is applied upward to the workpiece.

2. The combined friction and wear testing device according to claim 1, characterized in that: The elastic member is a tube spring, and the positioning structure further comprises a transverse guide rod, one end of which is connected to the locking member, and the other end of which is sleeved inside the tube spring and connected to the corresponding clamping seat.

3. The combined friction and wear testing device according to claim 2, characterized in that: Each of the clamping seats is provided with a guide hole, and one end of the transverse guide rod extends and is located in the two guide holes.

4. The combined friction and wear testing device according to any one of claims 1 to 3, characterized in that: The mold insert is provided with a heating hole, and the combined friction and wear testing device further comprises a heating rod which is arranged in the heating hole and is used for heating the workpiece.

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