Gasket testing device and method

Abstract

The present invention belongs to the technical field of fastener performance testing, and discloses a gasket testing device and method. The gasket testing device includes a test bench, a fixture module and a pressure test module. The test bench is used to carry gaskets; the fixture module is arranged on the test bench and is used to clamp gaskets. The pressure test module includes a driving assembly, a fixing member, a pressure detection member, a deformation detection member and a pressure member. The fixing member is arranged at the output end of the driving assembly, and the detection mechanism and the pressure member are both arranged on the fixing member. The driving assembly can drive the fixing member to move to drive the pressure member to press on the gasket. The detection mechanism can detect the pressure applied by the pressure member on the gasket, and can also detect the deformation amount of the gasket. When the gasket is tested, the specific pressure and deformation amount of the process from the beginning of the gasket being subjected to force to the occurrence of small cracks to complete fracture and failure can be accurately reflected.

Description

Technical Field

[0001] The invention relates to the technical field of fastener performance testing, and in particular to a gasket testing device and method. Background Art

[0002] Fasteners, mainly tile pad assemblies, are widely used in industrial electrical applications. Before using a tile pad, its support and deformation resistance need to be tested to determine whether the batch of tiles meets the requirements. In the prior art, the tile pad test is generally performed by directly flattening the tile pad using a compression tester to obtain the compressive stress-strain curve of the tile pad. This direct flattening test method is different from the actual stress conditions of the tile pad in use, that is, when pressure is applied to the tile pad, the specific process from the beginning of stress to the appearance of microcracks to complete fracture and failure cannot be fully reflected. Summary of the invention

[0003] The object of the present invention is to provide a gasket testing device and method, so that the performance test data of the gasket is more complete and accurate.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] Gasket test device, comprising:

[0006] A test bench for carrying washers;

[0007] A fixture module, disposed on the test workbench, the fixture module being capable of clamping the gasket;

[0008] The pressure testing module includes a driving component, a fixing part, a pressing part and a detecting mechanism, wherein the fixing part is arranged at the output end of the driving component, the detecting mechanism is arranged on the fixing part, the pressing part is connected to the fixing part, the driving component can drive the fixing part to move so as to drive the pressing part to press against the gasket, and the detecting mechanism is used to detect the pressure applied by the pressing part on the gasket, and detect the deformation of the gasket.

[0009] As an optional solution, the gasket is provided with a through hole, and the pressing piece includes a connecting structure, a pressure head and a plug-in column that are interconnected, the connecting structure is connected to the fixing piece, the pressure head is arranged at one end of the connecting structure away from the fixing piece and can press the gasket, and the plug-in column is arranged at one end of the pressure head away from the connecting structure and can be inserted into the through hole.

[0010] As an optional solution, the pressing member includes a connecting structure, a pressure head and a plug-in column that are interconnected, the connecting structure is connected to the fixing member, the pressure head is arranged at an end of the connecting structure away from the fixing member and can press the gasket, and the plug-in column is arranged at an end of the pressure head away from the connecting structure and can be inserted into the through hole of the gasket.

[0011] As an optional solution, the clamp module includes N fixed clamps and a driving member, where N is an integer greater than 1, and at least two of the fixed clamps are symmetrically arranged. The driving member can drive the fixed clamps to move along the X-axis and along the Y-axis so that at least two of the fixed clamps clamp the gasket, and the X-axis and the Y-axis are perpendicular to each other.

[0012] As an optional solution, the fixing clamping plate is provided with a notch, and the corners of the gasket are locked in the notch.

[0013] As an optional solution, the test workbench is provided with a coaxial locator directly facing the pressing member, and the coaxial locator is used to confirm whether the through hole and the plug-in column are coaxial.

[0014] As an optional solution, the fixture module further includes N surrounding bars, which are fixedly disposed on the test workbench, and the fixed clamping plates are slidably connected to the surrounding bars in a one-to-one correspondence.

[0015] As an optional scheme, the surrounding rod includes a first rod and a second rod connected to each other, the inner side surface of the first rod is provided with a first track groove extending along the X-axis, the inner side surface of the second rod is provided with a second track groove extending along the Y-axis, and sliders are provided in the first track groove and the second track groove, and the sliders in the first track groove and the sliders in the second track groove are both provided with rotatable screws, and the screws are threadedly connected to the fixed clamping plate, and the driving member can drive the two screws to rotate, so as to drive the fixed clamping plate to drive the slider in the first track groove to move along the X-axis, and drive the slider in the second track groove to move along the Y-axis.

[0016] As an optional solution, the N fixed card plates include a first fixed card plate, a second fixed card plate, a third fixed card plate and a fourth fixed card plate, the first fixed card plate and the third fixed card plate are arranged at both ends of a first diagonal line, the second fixed card plate and the fourth fixed card plate are arranged at both ends of a second diagonal line, and the first diagonal line and the second diagonal line are two diagonal lines intersecting the centers of the area for placing the gasket;

[0017] The first fixed card plate can move along the positive direction of the X axis and the negative direction of the Y axis, and the third fixed card plate can move along the negative direction of the X axis and the positive direction of the Y axis, so that the two corners of the gasket are engaged in the notches of the first fixed card plate and the third fixed card plate;

[0018] The second fixed card plate can move along the positive direction of the X-axis and the positive direction of the Y-axis, and the fourth fixed card plate can move along the negative direction of the X-axis and the negative direction of the Y-axis, so that the other two corners of the gasket are engaged in the notches of the second fixed card plate and the fourth fixed card plate.

[0019] As an optional solution, the notch of the first fixed clamping plate is in a ┏ shape, and / or,

[0020] The notch of the second fixed card plate is in the shape of ┗, and / or,

[0021] The notch of the third fixed card plate is in a ┛ shape, and / or,

[0022] The notch of the fourth fixed clamping plate is in a ┓ shape.

[0023] As an optional solution, the test workbench includes a K-shaped bracket and a table top arranged on the K-shaped bracket, and the K-shaped bracket is fixedly arranged on the driving assembly.

[0024] As an optional solution, the driving assembly includes elevators arranged on both sides of the test workbench, the fixing member includes a beam connected between the output ends of the two elevators and a fixing block connected to the beam, the detection mechanism is integrated on the fixing block, and the pressure member is connected to the fixing block.

[0025] As an optional solution, it also includes a loading module, which includes a transmission mechanism and baffles relatively arranged on both sides of the transmission mechanism. The transmission mechanism is used to convey the gaskets, and the relatively arranged baffles can approach or move away from each other to adjust the spacing along the conveying direction perpendicular to the gaskets.

[0026] A gasket testing method is applied to the gasket testing device described in any of the above schemes, and the gasket testing method comprises the following steps:

[0027] Control the driving assembly to drive the fixing member to drive the pressing member to press the gasket according to a preset condition, wherein the preset condition includes a preset pressure applied to the gasket or a preset deformation amount of the gasket or pressing the gasket into a flattened state;

[0028] Receive actual pressure information and actual deformation information detected by the detection agency;

[0029] According to the actual pressure information and the actual deformation amount information, it is determined whether the gasket meets the preset requirements.

[0030] Beneficial effects of the present invention:

[0031] The present invention provides a gasket testing device, which integrates a detection mechanism and a pressure piece on a fixing member, clamps and positions the gasket through a clamp module, and drives the fixing member to move, so as to drive the pressure piece to accurately press on the gasket and deform the gasket. The pressure piece can simulate the actual situation to press on the gasket. During this process, the detection mechanism can detect the pressure and deformation amount, and can obtain the pressure value of the gasket under any deformation amount, that is, from the beginning of the gasket being stressed to the occurrence of tiny cracks to complete fracture and failure. The specific pressure value and deformation amount of this process can be accurately reflected, so that the performance test data of the gasket is more complete and accurate, and more in line with the actual situation.

[0032] A gasket testing method provided by the present invention can form a comprehensive and effective evaluation of the gasket by testing the gasket under preset conditions. The test result is more reliable and can accurately determine whether the performance of the gasket meets the requirements under actual circumstances. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a structural schematic diagram of a gasket testing device provided by an embodiment of the present invention;

[0034] Figure 2 The structure of the pressure test module involved in the embodiment of the present invention is shown in FIG. Figure 1 ;

[0035] Figure 3 yes Figure 2 A magnified view of the structure at center A;

[0036] Figure 4 The structure of the pressure test module involved in the embodiment of the present invention is shown in FIG. Figure 2 ;

[0037] Figure 5 is a schematic structural diagram of a pressing member involved in an embodiment of the present invention;

[0038] Figure 6 is a schematic structural diagram of a gasket involved in an embodiment of the present invention;

[0039] Figure 7 is a structural schematic diagram of a clamp module involved in an embodiment of the present invention;

[0040] Figure 8 It is a structural schematic diagram of a feeding module and a pressure testing module involved in an embodiment of the present invention;

[0041] Fig. 9 yes Figure 7 A magnified view of the structure at point B.

[0042] In the figure:

[0043] 100, washer; 101, through hole;

[0044] 1. Test workbench; 11. Table; 111. Coaxial positioner; 12. K-shaped bracket;

[0045] 2. Clamp module; 21. Fixed card plate; 211. Notch; 22. Surrounding rod; 221. First track groove; 222. Second track groove; 23. Sliding block; 24. Screw;

[0046] 3. Pressure test module; 31. Drive assembly; 311. Lifter; 3111. Fixing frame; 3112. Lifting motor; 3113. Lead screw; 3114. Limit alarm; 32. Fixing piece; 321. Crossbeam; 3211. Connecting block; 322. Fixing block; 33. Pressing piece; 331. Pressure head; 332. Connecting column; 333. Connecting part; 334. Limiting part; 34. Detection mechanism;

[0047] 4. Feeding module; 41. Vibrating plate; 411. Spiral track; 412. Vibration intensity regulator; 42. Transmission mechanism; 43. Baffle; 44. Stop cylinder; 45. Push cylinder; 46. Lifting cylinder; 47. Noise reduction box;

[0048] 5. Unloading module; 51. Unloading cylinder; 52. Unloading push block;

[0049] 6. Receiving tray;

[0050] 7.CCD industrial camera;

[0051] 8. Control system. DETAILED DESCRIPTION

[0052] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar parts or parts having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0053] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, it can be a mechanical connection or an electrical connection, it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In the description of the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0055] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0056] like Figure 1-Figure 9 As shown, an embodiment of the present invention provides a gasket testing device, which includes a test bench 1, a fixture module 2 and a pressure testing module 3. The test bench 1 is used to carry the gasket 100; the fixture module 2 is arranged on the test bench 1 and is used to clamp the gasket 100 so that the gasket 100 is positioned on the test bench 1. The pressure testing module 3 includes a driving component 31, a fixing member 32, a pressing member 33 and a detection mechanism 34. The fixing member 32 is arranged at the output end of the driving component 31. The pressure detection member, the deformation detection member and the pressing member 33 are all arranged on the fixing member 32. The driving component 31 can drive the fixing member 32 to move so as to drive the pressing member 33 to press against the gasket 100. When the pressing member 33 presses against the gasket 100, the pressure value and the deformation amount of the gasket 100 can be transmitted to the detection mechanism 34. The detection mechanism 34 can detect the pressure value applied by the pressing member 33 on the gasket 100, and can detect the deformation amount of the gasket 100. The gasket 100 in this embodiment is a structure with an arch. The gasket 100 may also be called a tile gasket or a washer.

[0057] The gasket testing device integrates the detection mechanism 34 and the pressure piece 33 on the fixing member 32, and clamps the gasket 100 in place through the fixture module 2. The driving component 31 drives the fixing member 32 to move, so as to drive the pressure piece 33 to accurately press on the gasket 100 and deform the gasket 100. The pressure piece 33 can simulate the actual situation to press on the gasket 100. During this process, the detection mechanism 34 can detect the pressure value and the deformation amount, and can obtain the pressure value of the gasket 100 under any deformation amount, that is, from the beginning of the gasket 100 being stressed to the occurrence of tiny cracks to complete fracture and failure. The specific pressure value and deformation amount of this process can be accurately reflected, so that the performance test data of the gasket 100 is more complete and accurate, and more in line with the actual situation.

[0058] Specifically, the fixing member 32 includes a fixing block 322, and the detection mechanism 34 includes a pressure detection member and a deformation detection member. The pressure detection member and the deformation detection member can be integrated and installed in the fixing block 322, that is, the pressure detection member, the deformation detection member and the fixing block 322 are an integrated structure, or the pressure detection member and the deformation detection member are both arranged on the fixing block 322.

[0059] The specific process of detecting the gasket 100 is as follows: when the pressing piece 33 presses against the gasket 100 and causes it to deform, the pressing piece 33 simulates the pressure that the gasket 100 is subjected to under actual conditions. The pressure detecting piece can detect the pressure, and the deformation detecting piece can detect the deformation amount. The pressure value of the gasket 100 under any deformation amount can be obtained, that is, the specific pressure value and deformation amount of the gasket 100 from the beginning of the stress to the occurrence of tiny cracks until it completely breaks and fails. This process can be accurately reflected, so that the performance test data of the gasket 100 is more complete and accurate, and more in line with the actual situation.

[0060] In this embodiment, the pressure detection member can be selected as a pressure sensor, the maximum load of the pressure sensor is 10KN, the power supply voltage is 24V, the output signal is 0-5V, the sensitivity is 1.5mV / V, and the accuracy level is ±0.03%. The deformation detection member can be selected as a displacement sensor, the measurement range of the displacement sensor is 1-100mm, the output signal is 0-5V or the current is 4-20mA, the sensitivity is 5mV / V, and the accuracy level is ±0.05%. The displacement sensor detects the displacement of the pressing member 33 when pressing the gasket 100, which can reflect the deformation of the gasket 100.

[0061] In other embodiments, the pressure sensor and the displacement sensor may also be selected to be an integrated force and displacement sensor structure.

[0062] Specifically, Figure 2-Figure 4As shown, the driving assembly 31 includes elevators 311 symmetrically arranged on both sides of the test workbench 1, the fixing member 32 includes a fixing block 322 and a beam 321, the two ends of the beam 321 are respectively connected between the output ends of the two elevators 311, the fixing block 322 is fixed to the beam 321 through a connecting block 3211, the detection mechanism 34 is arranged on the fixing block 322, the pressing member 33 is connected to the fixing block 322, the two elevators 311 are lifted and lowered by driving the beam 321 to drive the fixing block 322 to lift and lower, so that the pressing member 33 can press the gasket 100; and the fixing block 322 is lifted and lowered by driving the beam 321 through the two elevators 311, the structure is stable and can withstand greater pressure.

[0063] Furthermore, the lifter 311 includes a fixed frame 3111, a lifting motor 3112 and a lead screw 3113, the lead screw 3113 is rotatably arranged on the fixed frame 3111, the lifting motor 3112 can drive the lead screw 3113 to rotate, both ends of the cross beam 321 are provided with nut heads threadedly connected to the lead screw 3113, the nut head and the lead screw 3113 are threadedly connected and a ball is arranged between the nut head and the lead screw 3113, and the lifting motor 3112 drives the lead screw 3113 to rotate, so as to realize the lifting and lowering of the cross beam 321. By setting the lead screw 3113 structure, the lifting and lowering accuracy is high, and the measurement accuracy can be lifted and lowered at 0.05mm / s.

[0064] Furthermore, the test workbench 1 includes a K-shaped bracket 12 and a table top 11 arranged on the K-shaped bracket 12, two fixed frames 3111 are arranged at intervals along the X-axis, the K-shaped bracket 12 is arranged between the two fixed frames 3111, the two ends of the cross bar of the K-shaped bracket 12 are respectively welded to the front ends of the two fixed frames 3111, and the ends of the two oblique bars of the K-shaped bracket 12 facing away from the cross bar are respectively welded to the rear ends of the two fixed frames 3111, and the table top 11 is arranged on the K-shaped bracket 12. This structure improves stability.

[0065] In order to prevent collision, the elevator 311 also includes a limit alarm 3114, which is arranged on the fixed frame 3111. When the pressure piece 33 is about to hit the table surface 11 of the test workbench 1, one end of the limit alarm 3114 senses a signal, and the other end receives the signal and feeds it back to the control system 8. The control system 8 will transmit an instruction to automatically pause the lifting motor 3112.

[0066] Specifically, when the pressing member 33 presses the washer 100, the clamp module 2 will loosen the washer 100, so that the washer 100 does not move when the pressing member 33 presses the washer 100. Figure 5-Figure 6 Combined with Figure 3As shown, the pressing member 33 includes a connecting structure, a pressure head 331 and a plug-in column 332 that are connected to each other. The connecting structure is connected to the fixed block 322. The pressure head 331 is arranged at one end of the connecting structure away from the fixed block 322, and the plug-in column 332 is arranged at one end of the pressure head 331 away from the connecting structure. When the pressing member 33 presses the washer 100, the plug-in column 332 is first inserted into the through hole 101 of the washer 100 to prevent the washer 100 from moving. As the pressing member 33 continues to move downward, the pressure head 331 can face the washer 100 and press the washer 100, so as to simulate the scene of the washer 100 fixing the wire when used in combination to deform the washer 100, so that the test scene is more in line with the actual use scene, and the test result is more reliable.

[0067] Furthermore, the connecting structure includes a connecting portion 333 and a limiting portion 334, the connecting portion 333 is connected to the fixed block 322, the limiting portion 334 is arranged at the end of the connecting portion 333 away from the fixed block 322 and can abut against the fixed block 322, the pressure head 331 is arranged at the end of the limiting portion 334 away from the connecting portion 333, and when the pressing member 33 presses the gasket 100, it abuts against the fixed block 322 through the limiting portion 334, so that the limiting portion 334 can withstand the pressure, so as to prevent the connection between the connecting portion 333 and the fixed block 322 from being damaged, thereby improving the service life of the pressing member 33.

[0068] In order to facilitate the connection between the connecting part 333 and the fixed block 322, the connecting part 333 is provided with an external thread, and the fixed block 322 is provided with a threaded hole matching the external thread. The connecting part 333 is screwed with the threaded hole to achieve the connection between the connecting part 333 and the fixed block 322. After the limiting part 334 abuts against the fixed block 322, the connection between the connecting part 333 and the fixed block 322 can be stably connected.

[0069] The gasket testing device is provided with a pressing member 33, and the pressing member 33 can be replaced and matched according to different specifications of the gasket 100, so as to meet the requirements of gaskets 100 with more specifications and higher adaptability; and the connecting part 333 is screwed with the fixing block 322, so replacement is more convenient.

[0070] Specifically, refer to Figure 7 As shown, the fixture module 2 includes N fixed clamps 21 and a driving member, N is an integer greater than 1, at least two fixed clamps 21 are symmetrically arranged, the driving member can drive one of the two symmetrically arranged fixed clamps 21 to move along one direction of the X-axis and one direction of the Y-axis, and the driving member can also drive the other of the two symmetrically arranged fixed clamps 21 to move along another direction of the X-axis and another direction of the Y-axis, so that at least two fixed clamps 21 can clamp the gasket 100, and the X-axis and the Y-axis are perpendicular to each other.

[0071] For example, if the driving member drives one fixed card plate 21 to move along the positive direction (X+) of the X axis and the negative direction (Y-) of the Y axis, the driving member also drives another fixed card plate 21 to move along the negative direction (X-) of the X axis and the positive direction (Y+) of the Y axis.

[0072] The fixed clamp 21 is provided with a notch 211 corresponding to the corners of the gasket 100. When the fixed clamp 21 is moving, the notches 211 of the two fixed clamps 21 can respectively press against the two corners of the gasket 100 along its diagonal line to clamp the gasket 100 so that the corners of the gasket 100 can be engaged in the notch 211. During this process, if there is a deviation in the position of the gasket 100 placed on the table 11 of the test workbench 1, the two fixed clamps 21 can also push the gasket 100 to face the pressing piece 33 when moving to achieve the positioning of the gasket 100.

[0073] Furthermore, the fixture module 2 also includes N surrounding rods 22, which are fixedly arranged on the table top 11 of the test workbench 1. The surrounding rods 22 correspond one-to-one to the fixed clamping plates 21, and the fixed clamping plates 21 are slidably connected to the corresponding surrounding rods 22, thereby improving the movement stability of the fixed clamping plates 21.

[0074] The surrounding rod 22 includes a first rod and a second rod connected to each other. The inner side surface of the first rod is provided with a first track groove 221 extending along the X axis, and the inner side surface of the second rod is provided with a second track groove 222 extending along the Y axis. Slide blocks 23 are provided in the first track groove 221 and the second track groove 222. The slide blocks 23 in the first track groove 221 and the slide blocks 23 in the second track groove 222 are both provided with rotatable screw rods 24. The screw rods 24 are threadedly connected with the fixed card plate 21. The driving member can drive the two screw rods 24 to rotate so as to realize driving the corresponding fixed card plate 21 to move along the X axis and the Y axis. In this structure, when the screw rod 24 corresponding to the first track groove 221 is driven to rotate, the fixed card plate 21 moves along the Y axis and can drive the slide block 23 in the second track groove 222 to slide so that the fixed card plate 21 moves smoothly. The working condition when the screw rod 24 corresponding to the second track groove 222 is driven to rotate is the same as the working condition principle of driving the screw rod 24 corresponding to the first track groove 221 to rotate, and will not be repeated here.

[0075] In this embodiment, the driving member corresponding to each fixed clamping plate 21 includes two driving motors, one driving motor can drive the screw rod 24 corresponding to the first track groove 221 to rotate, and the other driving motor can drive the screw rod 24 corresponding to the second track groove 222 to rotate.

[0076] In order to make the positioning of the gasket 100 more accurate, in the present embodiment, the N fixed card plates 21 include a first fixed card plate, a second fixed card plate, a third fixed card plate and a fourth fixed card plate, the first fixed card plate and the third fixed card plate are arranged at both ends of the first diagonal line, the second fixed card plate and the fourth fixed card plate are arranged at both ends of the second diagonal line, the notch 211 of the first fixed card plate is ┏-shaped, the notch 211 of the second fixed card plate is ┗-shaped, the notch 211 of the third fixed card plate is ┛-shaped, and the notch 211 of the fourth fixed card plate is ┓-shaped. That is, when clamping and positioning the gasket 100, first control the fixed card plate 21 with the notch 211 in the shape of "┏" and "┗" to move along the positive direction of the X axis, and the fixed card plate 21 with the notch 211 in the shape of "┓" and "┛" to move along the negative direction of the X axis; then control the fixed card plate 21 with the notch 211 in the shape of "┗" and "┛" to move along the positive direction of the Y axis, and the fixed card plate 21 with the notch 211 in the shape of "┏" and "┓" to move along the negative direction of the Y axis; when the four fixed card plates 21 move to the given coordinate position, the gasket 100 can be clamped and positioned. The first diagonal line and the second diagonal line are two diagonal lines intersecting the center of the area for placing the gasket 100, that is, the first diagonal line and the second diagonal line are lines that are at an angle of 45° with the X axis and the Y axis.

[0077] In order to further ensure that the through hole 101 of the gasket 100 and the plug-in column 332 of the pressing member 33 are aligned, the table 11 of the test bench 1 is provided with a coaxial positioner 111 that is aligned with the pressing member 33, and the table 11 of the test bench 1 is provided with a through hole that is coaxial with the plug-in column 332 of the pressing member 33. Fig. 9 The coaxial locator 111 is arranged in the through hole and the signal transmitting end of the coaxial locator 111 emits light to the plug-in column 332 of the pressing member 33. When the fixing clamp 21 clamps and positions the gasket 100, the through hole 101 of the gasket 100 is coaxial with the through hole, and the light emitted by the coaxial locator 111 is not blocked, indicating that the through hole 101 of the gasket 100 and the plug-in column 332 are coaxial, which meets the detection requirements. If the light emitted by the coaxial locator 111 is blocked, it means that the position of the gasket 100 is inaccurate, and the through hole 101 of the gasket 100 and the plug-in column 332 are not coaxial, which does not meet the detection requirements. In order to facilitate the installation of the coaxial positioner 111, a flat plate is also provided on the table top 11 to increase the thickness of the table top 11. The through hole penetrates the table top 11 and the flat plate at the same time, so that the coaxial positioner 111 can be completely installed in the through hole, and the gasket 100 is located on the flat plate; or the flat plate may not be provided, and the overall thickness of the table top 11 can be directly increased, which can also achieve the effect of facilitating the installation of the coaxial positioner 111.

[0078] In this embodiment, the coaxial positioner 111 may be selected as a fiber optic sensor.

[0079] In order to realize the automatic loading of the gasket 100, as Figure 8As shown, the gasket testing device also includes a feeding module 4, which includes a vibration plate 41, a transmission mechanism 42 and a baffle 43 relatively arranged on the transmission mechanism 42. The vibration plate 41 is used to accommodate the gasket 100 and output the gasket 100 in sequence. Specifically, a spiral track 411 is arranged in the vibration plate 41. When the vibration plate 41 vibrates, the gasket 100 is spirally output through the spiral track 411; the transmission mechanism 42 is arranged between the output end of the spiral track 411 and the feed port of the table 11 of the test workbench 1. Along the conveying direction perpendicular to the gasket 100 (i.e., the X-axis direction), the relatively arranged baffles 43 are arranged at intervals on the transmission mechanism 42 and can be close to or away from each other to adjust the spacing so that the spacing between the two baffles 43 conforms to the width size of the gasket 100. Specifically, the transmission mechanism 42 is a conveyor belt, and the rotation of the conveyor belt is controlled to realize the continued conveyance of the gasket 100 output from the spiral track 411 to the conveyor belt.

[0080] Optionally, in order to ensure that adjacent washers 100 among a plurality of washers 100 are transported with a spacing of approximately 30 mm, the vibration intensity of the vibration disk 41 is set to 65 Hz and half wave through the vibration intensity regulator 412, and a baffle structure is provided on the spiral track 411 to screen and output the washers 100 in an orderly manner. The baffle structure can make the front side of the washers 100 face upward, that is, the arched side faces the pressure piece 33.

[0081] In order to reduce the noise of the vibration plate 41, the vibration plate 41 is arranged in a noise reduction box 47, and a noise-absorbing sponge board is arranged in the noise reduction box 47. The sponge board is arranged in a honeycomb shape to absorb noise.

[0082] The feeding module 4 also includes a stopper assembly and a pusher assembly. The stopper assembly includes a stopper cylinder 44 and a stopper rod. The stopper cylinder 44 is fixed to the transmission mechanism 42. The stopper rod is arranged at the output end of the stopper cylinder 44. When the stopper cylinder 44 drives the stopper rod to output, the stopper rod is located at the feed port position of the table 11 of the test workbench 1, and is used to stop the gasket 100. The pusher assembly includes a pusher cylinder 45, a lifting cylinder 46 and a pusher rod. The pusher cylinder 45 is arranged on a baffle 43. The lifting cylinder 46 is arranged at the output end of the pusher cylinder 45. The pusher rod is arranged at the output end of the lifting cylinder 46. The lifting cylinder 46 outputs and drives the pusher rod to move below the gasket 100. The pusher cylinder 45 outputs and drives the lifting cylinder 46 to drive the pusher rod to move, so that the gasket 100 moves to the table 11 of the test workbench 1.

[0083] Refer to Figure 1In order to enable the tested gasket 100 to automatically enter the receiving tray 6, the gasket testing device also includes a feeding module 5, which includes a feeding cylinder 51 and a feeding push block 52. The feeding cylinder 51 is arranged on the table 11 of the test workbench 1, and the feeding push block 52 is arranged at the output end of the feeding cylinder 51. The feeding cylinder 51 drives the feeding push block 52 to move along the positive direction of the Y axis to push the gasket 100 into the receiving tray 6.

[0084] Optionally, the gasket testing device further includes a CCD visual system, which can perform visual monitoring on the gasket 100. The CCD visual system can identify cracking conditions of the gasket 100 during the test, and the test results are more intuitive.

[0085] Specifically, the CCD vision system includes a CCD industrial camera 7 (10 million pixels, frame number ≥ 24 frames, test line of sight width and height are 100 mm and 80 mm respectively), an image collector and visual recognition software. The CCD industrial camera 7 can automatically capture and scan the gasket 100 and send it to the image collector. If exposure or fill light adjustment is required, it can be set through the visual recognition software. The image collector sends the image signal to the control system 8 for analysis and image processing.

[0086] The gasket testing device realizes the automated testing of the gasket 100. When testing the gasket 100, the gasket 100 is transported to the table 11 of the test workbench 1 through the feeding module 4, and the fixture module 2 clamps and positions the gasket 100. If the position of the gasket 100 is accurate, the coaxial positioner 111 feeds back the signal to the control system 8, and then controls the lifting motor 3112 to control the pressure piece 33 to descend at a uniform speed of 30 mm / s. When the plug-in column 332 of the pressure piece 33 is fully inserted into the through hole 101 of the gasket 100, the pressure detection piece and the deformation detection piece are reset to zero, that is, the measurement is performed after the calibration reference. The pressure detection piece detects the pressure on the gasket 100, and the deformation detection piece is used to detect the descending displacement of the elevator 311. If the pressure on the gasket 100 changes suddenly, it indicates that the gasket 100 is cracked. If no sudden change occurs, it indicates that the gasket 100 meets the requirements under the current preset conditions.

[0087] Taking the assembly of an M3.5 screw and a washer 100 as an example, an embodiment of the present invention further provides a washer testing method, which is applied to the above-mentioned washer testing device, wherein the washer 100 has a length of 8.5 mm ± 0.1 mm, a width of 7.5 mm ± 0.1 mm, a camber of 3.5 mm ± 0.1 mm, and is made of 45# steel. The hardness range after heat treatment is approximately 39HRC-41HRC, and the corrosion resistance after electroplating is strong. The assembly is widely used in low-voltage electrical appliances.

[0088] The gasket testing method includes the following steps: controlling the driving component 31 to drive the fixing member 32 to drive the pressing member 33 to press the gasket 100 according to preset conditions, wherein the preset conditions include a preset pressure of the pressing member 33 pressing on the gasket 100 or a preset deformation amount when the gasket 100 is deformed (i.e., the displacement amount of the elevator 311) or pressing the gasket 100 into a flattened state.

[0089] Under the above preset conditions, the control system 8 receives the actual pressure information detected by the pressure detection member and the actual deformation information detected by the deformation detection member. The unit of the actual pressure detected by the pressure detection member is N, and the unit of the actual deformation detected by the deformation detection member is mm.

[0090] The actual pressure information and the actual deformation amount information are analyzed by the control system 8, and combined with the actual pressure information and the actual deformation amount information to determine whether the gasket 100 meets the preset requirements (the preset requirements are whether the gasket 100 is cracked. If it is not cracked, it indicates that the gasket 100 meets the preset requirements. If it is cracked, it indicates that the gasket 100 does not meet the preset requirements).

[0091] The gasket 100 is tested for performance under preset conditions. The preset conditions are to set a preset pressure, that is, to set the preset pressure to a fixed value, and analyze whether the actual pressure has a sudden change or whether the actual deformation is within the required range; the preset conditions are to set a preset deformation, that is, to set the deformation of the gasket 100 to a fixed value, and when the gasket 100 reaches the set deformation, analyze whether the actual pressure has a sudden change; the preset conditions are to press the gasket 100 into a flat state, that is, to completely flatten the gasket 100, that is, the actual deformation is 3.5mm, and analyze whether the actual pressure has a sudden change. The above gasket testing method can form a more comprehensive and effective evaluation method for the gasket 100, the test results are more reliable, and it can accurately determine whether the performance of the gasket 100 meets the requirements in actual situations.

[0092] The following is a detailed description in conjunction with a specific implementation method.

[0093] In the first embodiment: the preset condition is to set the preset pressure, that is, to set the preset pressure to a fixed value, and to judge the performance indicators such as the strength and hardness of the gasket 100 by analyzing whether the actual deformation information or the actual pressure information of the gasket 100 has a sudden change. Specifically, the curvature of the gasket 100 is 3.5mm, and the preset pressure value is set to 3500N. After the pressing member 33 presses the gasket 100 and the pressure detection member and the deformation detection member are reset to zero and calibrated, the downward pressing speed of the elevator 311 is set to 0.05mm / s (it can also be set to 0.01mm / s or 0.02mm / s according to actual conditions), and the pressure instantaneous sudden change value is set to 2000N / s, and the test accuracy is ±0.01%. When the elevator 311 drives the fixing member 32 to drive the pressing member 33 to press down, when the actual pressure value gradually increases to 3500N, the curvature of the gasket 100 decreases from 3.5mm to 2mm, and the actual deformation of the gasket 100 is 1.5mm, which takes about 30s.

[0094] This method can be used for comparative analysis. Under a fixed pressure value, if the deformation of the camber of the gasket 100 is less than 1.5 mm, it can be shown that the gasket 100 has high compression strength and hardness and is not easy to deform. If the actual pressure gradually increases to 3500 N, the actual deformation of the camber of the gasket 100 exceeds 1.5 mm or the actual pressure suddenly changes to 2000 N / s, and cracking occurs, at this time, the information of the pressure detection part and the information of the deformation detection part will be transmitted to the control system 8, and the control system 8 will lock the actual deformation exceeding 1.5 mm or the actual pressure suddenly changes to 2000 N / s for memory, and control the elevator 311 to pause. Then, the CCD industrial camera 7 is used for photo recognition. Since the photos of the edge side of the gasket 100 are taken at different heights in the early stage and stored in the control system 8, by comparing the front and back photos, because the cracking of the gasket 100 usually occurs at the highest point of the edge side of the gasket 100 and extends downward, it is possible to identify whether the gasket 100 in the current state has cracks by comparing the photos in this direction. The visual recognition software has the function of measuring the length, area, angle, position and other parameters of the gasket 100 in the photo, so it can also reflect the abnormal situation of the gasket 100 from the side by measuring the change of the curvature of the gasket 100 from 3.5 mm to the current situation. After the test, the control system 8 automatically calculates the corresponding data and draws it into a function graph for easy analysis.

[0095] In the second embodiment, the preset condition is to set the preset deformation amount, that is, to set the preset deformation amount to a fixed value, and to judge the performance indicators such as the strength and hardness of the gasket 100 by analyzing the change of the actual pressure. For example, if the gasket 100 is pressed down by 3mm, and a 0.5mm safety test area is reserved, it is equivalent to the actual deformation amount of the gasket 100 being 3mm, that is, the displacement amount of the elevator 311 pressing down is 3mm. Specifically, the starting displacement value is set to 3.5mm, the ending displacement value is set to 0.5mm, and the pressure instantaneous mutation value is set to 2000N / s. When the pressing member 33 presses against the gasket 100 and returns the pressure detection member and the deformation detection member to zero correction, the pressing speed is set to 0.05mm / s (the test speed can also be selected as 0.01mm / s, 0.02mm / s), and the test accuracy is ±0.01%. At this time, the control system 8 receives the information from the pressure detection member and the deformation detection member. During the pressing process of the pressing member 33, when the actual deformation of the gasket 100 decreases from the starting displacement value of 3.5mm to the ending displacement value of 0.5mm, the actual pressure value increases from 0N to 5000N, that is, the actual deformation of the gasket 100 is 3mm, which requires a pressure of about 5000N and takes 60s.

[0096] In this way, comparative analysis can be performed. Under a fixed deformation, when the actual pressure on the gasket 100 is greater than 5000N, it indicates that the gasket 100 has high compression strength and hardness and is not easily deformed. If the actual pressure is less than 5000N or the actual pressure suddenly changes to 2000N / s when the camber of the gasket 100 changes from the initial displacement value of 3.5mm to the final displacement value of 0.5mm, and cracks appear, then the information of the pressure detection component and the information of the deformation detection component will be transmitted to the control system 8, and the control system 8 will memorize and lock the actual pressure value less than 5000N (such as 4999N) or the instantaneous sudden change value of the actual pressure value suddenly changing to 2000N / s, and control the elevator 311 to stop. Then, a CCD industrial camera 7 is used for photo recognition. Since photos of the face side of the gasket 100 are taken at different heights in the early stage and stored in the control system 8, by comparing the front and back photos, since the gasket 100 usually cracks at the highest point of the face side of the gasket 100 and extends downward, by comparing the photos in this direction, it is possible to identify whether the gasket 100 in the current state has cracks. The instantaneous pressure value after memory locking corresponds to the corresponding instantaneous displacement value. At this time, the maximum pressure that the gasket 100 can withstand can be obtained, thereby reflecting the compressive strength and hardness of the gasket 100. This method can compare and analyze the maximum pressure that the gasket 100 can withstand under a fixed deformation amount. After the test, the control system 8 automatically calculates the corresponding data and plots it into a function graph for easy analysis.

[0097] The third implementation mode: the preset condition is that the preset pressure and the preset deformation are not set, and the gasket 100 is directly completely flattened so that the gasket 100 is pressed into a flat state, and the performance indicators such as the compression strength and hardness of the gasket 100 are determined by analyzing the actual pressure and the actual deformation. Specifically, the initial displacement value of the gasket 100 is set to 3.5mm, the final displacement value is set to 0mm, and the pressure instantaneous mutation value is set to 2000N / s. When the pressing member 33 presses against the gasket 100 and returns the pressure detection member and the deformation detection member to zero correction, the pressing speed is set to 0.05mm / s (the test speed can also be selected as 0.01mm / s or 0.02mm / s), and the test accuracy is ±0.01%. At this time, the control system 8 receives the information of the pressure detection member and the deformation detection member. During the pressing process of the pressing member 33, the actual deformation of the gasket 100 decreases from a starting displacement value of 3.5mm to a terminal displacement value of 0mm. The actual pressure value increases from 0N to 5500N, that is, a pressure of about 5500N is required for the gasket 100 to be completely flattened, and it takes 70s.

[0098] In this way, the maximum pressure and displacement changes that the gasket 100 is subjected to can be compared and analyzed without setting the preset pressure and the preset deformation amount. In this way, the gasket 100 is easily cracked by pressure, so it is necessary to identify the change of the actual pressure value. That is, during the test, by transmitting the information of the actual pressure to the control system 8, the actual pressure rises linearly from 0N. In the process of the actual pressure gradually increasing to 5500N, the actual pressure suddenly changes to 2000N / s, and cracks appear in the gasket 100. At this time, the information of the pressure detection part and the information of the deformation detection part will be transmitted to the control system 8, and the control system 8 will memorize and lock the instantaneous mutation value of the pressure, and control the elevator 311 to stop. Then, a CCD industrial camera 7 is used for photo recognition. Since photos of the face side of the gasket 100 are taken at different heights in the early stage and stored in the control system 8, by comparing the front and back photos, since the gasket 100 usually cracks at the highest point of the face side of the gasket 100 and extends downward, by comparing the photos in this direction, it is possible to identify whether the gasket 100 in the current state has cracks. And the visual recognition software has the function of measuring parameters such as the length, area, angle, and position of the gasket 100 in the photo, so it can also reflect the abnormal situation of the gasket 100 from the side by measuring the change of the curvature of the gasket 100 from 3.5mm to the current situation. After the test, the control system 8 automatically calculates the corresponding data and draws it into a function graph for easy analysis.

[0099] The performance of the gasket 100 is evaluated in three ways, and the actual usage can be better simulated according to the gaskets 100 of different specifications, so as to quickly identify, detect and analyze the abnormalities such as cracks in the gasket 100 during the pressing process.

[0100] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A gasket testing device, characterized in that: include: A test workbench (1) for carrying a washer (100), wherein the washer (100) has a camber; A fixture module (2) is arranged on the test workbench (1), and the fixture module (2) is capable of clamping the gasket (100); A pressure test module (3), comprising a driving component (31), a fixing component (32), a pressing component (33) and a detection mechanism (34), wherein the fixing component (32) is arranged at the output end of the driving component (31), the detection mechanism (34) is arranged on the fixing component (32), the pressing component (33) is connected to the fixing component (32), the driving component (31) can drive the fixing component (32) to move, so as to drive the pressing component (33) to press against the gasket (100), and the detection mechanism (34) is used to detect the pressure applied by the pressing component (33) on the gasket (100), and to detect the deformation amount of the gasket (100); The gasket (100) is provided with a through hole (101), and the pressing piece (33) comprises a connecting structure, a pressure head (331) and an inserting column (332) which are connected to each other, the connecting structure is connected to the fixing piece (32), the pressure head (331) is arranged at an end of the connecting structure away from the fixing piece (32) and can press the gasket (100), and the inserting column (332) is arranged at an end of the pressure head (331) away from the connecting structure and can be inserted into the through hole (101).

2. The gasket testing device according to claim 1, characterized in that: The connection structure comprises a connection portion (333) and a limiting portion (334); the connection portion (333) is connected to the fixing member (32); the limiting portion (334) is arranged at an end of the connection portion (333) away from the fixing member (32) and is capable of abutting against the fixing member (32); and the pressure head (331) is arranged at an end of the limiting portion (334) away from the connection portion (333).

3. The gasket testing device according to claim 1, characterized in that: The clamp module (2) comprises N fixed clamps (21) and a driving member, wherein N is an integer greater than 1, and at least two of the fixed clamps (21) are symmetrically arranged. The driving member can drive the fixed clamps (21) to move along the X-axis and along the Y-axis so that at least two of the fixed clamps (21) clamp the gasket (100), and the X-axis and the Y-axis are perpendicular to each other.

4. The gasket testing device according to claim 3, characterized in that: The fixed clamping plate (21) is provided with a notch (211), and the corner engagement limit of the gasket (100) is located in the notch (211).

5. The gasket testing device according to claim 1, characterized in that: The test workbench (1) is provided with a coaxial locator (111) directly facing the pressing member (33), and the coaxial locator (111) is used to confirm whether the through hole (101) and the plug-in column (332) are coaxial.

6. The gasket testing device according to claim 3, characterized in that: The fixture module (2) further comprises N surrounding rods (22), wherein the surrounding rods (22) are fixedly arranged on the test workbench (1), and the fixed clamping plates (21) are slidably connected to the surrounding rods (22) in a one-to-one correspondence.

7. The gasket testing device according to claim 6, characterized in that: The surrounding rod (22) comprises a first rod and a second rod connected to each other, the inner side surface of the first rod is provided with a first track groove (221) extending along the X-axis, the inner side surface of the second rod is provided with a second track groove (222) extending along the Y-axis, the first track groove (221) and the second track groove (222) are both provided with sliders (23), and the sliders (23) in the first track groove (221) and the sliders (23) in the second track groove (222) are both provided with rotatable screw rods (24), the screw rods (24) are threadedly connected to the fixed clamping plate (21), and the driving member can drive the two screw rods (24) to rotate, so as to drive the fixed clamping plate (21) to drive the slider (23) in the first track groove (221) to move along the X-axis, and drive the slider (23) in the second track groove (222) to move along the Y-axis.

8. The gasket testing device according to claim 4, characterized in that: The N fixed card plates (21) include a first fixed card plate, a second fixed card plate, a third fixed card plate and a fourth fixed card plate, the first fixed card plate and the third fixed card plate are arranged at two ends of a first diagonal line, the second fixed card plate and the fourth fixed card plate are arranged at two ends of a second diagonal line, and the first diagonal line and the second diagonal line are two diagonal lines whose centers intersect in an area for placing the gasket (100); The first fixed card plate can move along the positive direction of the X axis and the negative direction of the Y axis, and the third fixed card plate can move along the negative direction of the X axis and the positive direction of the Y axis, with two corners of the gasket (100) being engaged in the notches (211) of the first fixed card plate and the third fixed card plate; The second fixed clamping plate can move along the positive direction of the X-axis and the positive direction of the Y-axis, and the fourth fixed clamping plate can move along the negative direction of the X-axis and the negative direction of the Y-axis, so that the other two corners of the gasket (100) are engaged in the notches (211) of the second fixed clamping plate and the fourth fixed clamping plate.

9. The gasket testing device according to claim 8, characterized in that: The notch (211) of the first fixed clamping plate is in the shape of ┏, and / or, The notch (211) of the second fixing clamping plate is in the shape of ┗, and / or, The notch (211) of the third fixing clamping plate is in the shape of ┛, and / or, The notch (211) of the fourth fixed clamping plate is in a ┓ shape.

10. The gasket testing device according to claim 1, characterized in that: The test workbench (1) comprises a K-shaped bracket (12) and a tabletop (11) arranged on the K-shaped bracket (12); the K-shaped bracket (12) is fixedly arranged on the drive assembly (31).

11. The gasket testing device according to claim 1, characterized in that: The driving assembly (31) comprises lifts (311) arranged on both sides of the test workbench (1); the fixing member (32) comprises a crossbeam (321) connected between output ends of the two lifts (311) and a fixing block (322) connected to the crossbeam (321); the detection mechanism (34) is integrated on the fixing block (322); and the pressing member (33) is connected to the fixing block (322).

12. The gasket testing device according to claim 1, characterized in that: The invention also comprises a loading module (4), wherein the loading module (4) comprises a transmission mechanism (42) and baffles (43) arranged on both sides of the transmission mechanism (42) in opposite directions, wherein the transmission mechanism (42) is used to convey the gasket (100), and the baffles (43) arranged in opposite directions can move closer to or farther from each other to adjust the spacing along a conveying direction perpendicular to the gasket (100).

13. A gasket testing method, characterized in that: Using the gasket testing device according to any one of claims 1 to 12, the gasket testing method comprises the following steps: Controlling the driving component (31) to drive the fixing member (32) to drive the pressing member (33) to press the gasket (100) according to preset conditions, wherein the preset conditions include a preset pressure applied to the gasket (100) or a preset deformation amount of the gasket (100) or pressing the gasket (100) into a flattened state; receiving actual pressure information and actual deformation amount information detected by a detection mechanism (34); According to the actual pressure information and the actual deformation amount information, it is determined whether the gasket (100) meets the preset requirements.

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