Friction testing device and friction testing method

Abstract

The present invention provides a friction testing device and a friction testing method, comprising: a base plate, a first side plate and a second side plate connected to the base plate and arranged opposite to each other, and at least one force-applying member; the base plate is provided with at least one slide rail, and the first side plate and the second side plate are both slidably connected to the base plate via the slide rail; the first side plate is provided with a first clamping portion, and the second side plate is provided with a second clamping portion, and the first clamping portion and the second clamping portion are used to fix the roof assembly to be tested; the force-applying member is connected to the first side plate and the second side plate. The roof assembly to be tested can be clamped between the first side plate and the second side plate of the friction testing device. Since the first side plate and the second side plate are slidably connected to the base plate, the distance between the first side plate and the second side plate can be adjusted by the force-applying member, thereby changing the magnitude and direction of the force applied to the roof assembly to be tested, making it convenient for technicians to adjust the magnitude of the friction between the various components in the roof assembly to be tested and to perform friction testing on the roof assembly to be tested.

Description

Technical Field

[0001] The present invention relates to the technical field of roof testing, and in particular to a friction testing device and a friction testing method. Background Art

[0002] In order to increase the stability of the roof panel, the roof panel is generally connected to the purlin of the house through roof supports. However, due to the thermal expansion and contraction effects and the influence of wind, the roof panel will often slide relative to the roof support during use, which can easily cause damage to the inner wall of the roof panel and the roof support. Therefore, in the process of designing the roof panel and the roof support, it is necessary to simulate the friction damage during actual use in order to design safe and reliable roof panels and roof supports.

[0003] In related technologies, technicians will use the material of the roof panel to make friction blocks, and use the material of the roof support to make friction blocks, and then press the two friction blocks against each other and make them slide relative to each other. After reaching the preset number of sliding times and / or sliding time, the wear conditions of the two friction blocks are recorded, and the production of the roof panel and roof support is guided based on this wear condition.

[0004] However, the current testing methods cannot well simulate the actual wear of roof panels and roof supports during use. Summary of the Invention

[0005] The invention provides a friction testing device, aiming to solve the problems of inconvenience and poor effect in friction testing of roofing components.

[0006] A first aspect of an embodiment of the present invention provides a friction testing device, comprising:

[0007] a bottom plate, a first side plate and a second side plate connected to and opposite to the bottom plate, and at least one force applying member;

[0008] The bottom plate is provided with at least one slide rail, and the first side plate and the second side plate are both slidably connected to the bottom plate via the slide rail;

[0009] The first side plate is provided with a first clamping portion, and the second side plate is provided with a second clamping portion, and the first clamping portion and the second clamping portion are used to fix the roof assembly to be tested;

[0010] The force applying member is connected to the first side plate and the second side plate, and is used to adjust the distance between the two side plates so that the first clamping portion and the second clamping portion apply force to the roof assembly to be tested.

[0011] Optionally, there are two slide rails, and the two slide rails are parallel to each other;

[0012] Two first sliding feet are provided on one side of the first side plate close to the bottom plate, the distance between the two first sliding feet matches the distance between the two slide rails, and the two first sliding feet are slidably connected to the bottom plate through the two slide rails;

[0013] Two second sliding feet are provided on one side of the second side plate close to the bottom plate, the distance between the two second sliding feet matches the distance between the two slide rails, and the two second sliding feet are slidably connected to the bottom plate through the two slide rails.

[0014] Optionally, a first pressing plate and a second pressing plate;

[0015] The first side panel is provided with a first mounting opening, and the second side panel is provided with a second mounting opening;

[0016] The first pressing plate is located on the surface of the first side plate near the first mounting opening, the first pressing plate is connected to the first side plate via a fastener, and the first pressing plate and the first side plate form the first clamping portion;

[0017] The second pressing plate is located on the surface of the second side plate near the second mounting opening. The second pressing plate is connected to the second side plate via a fastener. The second pressing plate and the second side plate form the second clamping portion.

[0018] Optionally, a first mounting plate, a first pressing plate, a second mounting plate, and a second pressing plate;

[0019] The first mounting plate is arranged parallel to the first side plate, and the first mounting plate is fixedly connected to the first side plate via at least one connecting member located at an edge of the first pressure plate, so that the first mounting plate protrudes from a surface of the first side plate close to the second side plate;

[0020] The first mounting plate is further provided with a first mounting opening, the first pressing plate is located on the surface of the first mounting plate near the first mounting opening, the first pressing plate is connected to the first mounting plate via a fastener, and the first pressing plate and the first mounting plate form the first clamping portion;

[0021] The second mounting plate is arranged parallel to the second side plate, and the second mounting plate is fixedly connected to the second side plate through at least one connecting member located at the edge of the second pressure plate, so that the second mounting plate protrudes from the surface of the second side plate close to the first side plate.

[0022] The second mounting plate is also provided with a second mounting opening. The second pressure plate is located on the surface of the second mounting plate near the second mounting opening. The second pressure plate is connected to the second mounting plate through a fastener. The second pressure plate and the second mounting plate form the second clamping portion.

[0023] Optionally, the first side panel further includes a first installation window, and the second side panel further includes a second installation window;

[0024] The first installation window matches the shape and size of the first pressure plate, and the first installation window is used to pass the roof assembly to be tested;

[0025] The second installation window matches the shape and size of the second pressing plate, and the second installation window is used for passing the roof assembly to be tested.

[0026] Optionally, the number of the force applying members is four;

[0027] The two force applying members are respectively connected to two sets of the first sliding feet and the second sliding feet that are arranged opposite to each other;

[0028] Two first connecting plates are further provided on a side of the first side plate away from the bottom plate, and two second connecting plates are further provided on a side of the second side plate away from the bottom plate;

[0029] The other two force-applying members are respectively connected to two groups of the first connecting plates and the second connecting plates that are arranged opposite to each other.

[0030] Optionally, the force applying member includes a first screw, a second screw and a stress sensor;

[0031] The first screw is connected to one end of the stress sensor, and the second screw is connected to the other end of the stress sensor.

[0032] Optionally, each first screw passes through the through hole of the first side plate and is connected to the first side plate through clamping nuts located on both sides of the through hole, and each second screw passes through the through hole of the second side plate and is connected to the second side plate through clamping nuts located on both sides of the through hole.

[0033] Optionally, a chuck is further provided on a side of the bottom plate facing away from the first side plate, and the chuck is used to connect to a tensile testing machine.

[0034] Optionally, the friction testing device further comprises a fixture connected to the chuck;

[0035] One end of the fixture is a pit structure, a side wall of the pit structure is provided with a bayonet, the bayonet passes through the pit structure, and the pit structure is used to connect to the tensile testing machine;

[0036] A pressing portion is relatively arranged at the other end of the clamp, and the pressing portion includes two relatively arranged pressing plates, a first bolt passing through one of the pressing plates, and a second bolt passing through one of the pressing plates, the length of the second bolt is greater than the length of the first bolt, and the pressing portion is used to connect the chuck.

[0037] A second aspect of an embodiment of the present invention provides a friction testing method, comprising:

[0038] The two first test pieces are fixedly connected to the first clamping part and the second clamping part respectively;

[0039] Slidingly connecting one end of a second piece to be tested to one of the first pieces to be tested, and slidingly connecting the other end of the second piece to be tested to another of the first pieces to be tested;

[0040] Adjusting the length of the force-applying member between the first side plate and the second side plate so that the first clamping portion and the second clamping portion pull or compress the two ends of the roof assembly to be tested, thereby changing the magnitude of the friction force and / or the friction position between the second test piece and the first test piece;

[0041] A force is applied to the second piece to be tested and the bottom plate to generate a relative displacement between the second piece to be tested and the first piece to be tested.

[0042] Optionally, adjusting the length of the force-applying member between the first side plate and the second side plate includes:

[0043] According to the readings of the stress sensors located on the force-applying member, the length of the force-applying member between the first side plate and the second side plate is adjusted so that the sum of the readings of the stress sensors on all the force-applying members reaches a preset stress value.

[0044] Optionally, the first piece to be tested includes a roof panel, and the second piece to be tested is composed of a purlin and a roof panel fixing support installed on the purlin.

[0045] In an embodiment of the present invention, a friction testing device includes: a base plate, a first side plate and a second side plate connected to the base plate and arranged opposite to each other, and at least one force-applying member; the base plate is provided with at least one slide rail, and the first side plate and the second side plate are both slidably connected to the base plate via the slide rail; the first side plate is provided with a first clamping portion, and the second side plate is provided with a second clamping portion, and the first clamping portion and the second clamping portion are used to fix the roof assembly to be tested; a force-applying member is connected to the first side plate and the second side plate, and the force-applying member is used to adjust the distance between the two side plates so that the first clamping portion and the second clamping portion apply a force to the roof assembly to be tested. The first side plate and the second side plate of the friction testing device can clamp the roof assembly to be tested between them. Since the first side plate and the second side plate are slidably connected to the base plate, the distance between the first side plate and the second side plate can be adjusted by the force-applying member, thereby changing the magnitude and direction of the force applied to the roof assembly to be tested, making it easy to adjust the magnitude of the friction between the various components in the roof assembly to be tested, and facilitating the technician to perform friction testing on the roof assembly to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0047] Figure 1 A structural diagram of a friction testing device in an embodiment of the present application is shown;

[0048] Figure 2 A schematic diagram of a roof panel structure provided in an embodiment of the present application is shown;

[0049] Figure 3 A schematic structural diagram of a roof fixing assembly provided in an embodiment of the present application is shown;

[0050] Figure 4 A schematic diagram of installing a first device under test provided in an embodiment of the present application is shown;

[0051] Figure 5 A clamp provided by an embodiment of the present application is shown;

[0052] Figure 6 A flow chart of the friction testing method provided in an embodiment of the present application is shown;

[0053] Figure 7 A schematic diagram of the assembly of a roof assembly to be tested and a friction testing device provided in an embodiment of the present application is shown.

[0054] Description of reference numerals:

[0055] 10. Bottom plate; 11. Slide rail; 12. Clamp; 13. Baffle; 14. Center scale; 20. First side plate; 21. First slide foot; 22. First pressure plate; 23. First mounting port; 24. First mounting plate; 25. First mounting window; 26. Connector; 27. First connecting plate; 30. Second side plate; 31. Second slide foot; 32. Second pressure plate; 33. Second mounting port; 34. Second mounting plate; 35. Second mounting window; 37. Second connecting plate; 40, force-applying member; 41, first screw; 42, second screw; 43, stress sensor; 44, clamping nut; 50, roof panel; 51, panel edge strip; 52, tile rib; 60, roof fixing assembly; 61, purlin; 62, roof support; 70, clamp; 71, pit structure; 72, bayonet; 73, press plate; 74, first bolt; 75, second bolt; 80, roof assembly to be tested; 90, friction testing device. DETAILED DESCRIPTION

[0056] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0057] Reference Figure 1 , Figure 1 FIG. 1 shows a structural diagram of a friction testing device in an embodiment of the present application. Figure 1 As shown, the friction testing device includes a base plate, first and second side plates connected to and opposite to the base plate, and at least one force-applying member. The base plate is used to mount the first and second side plates. The first and second side plates are used to secure the roof assembly to be tested therebetween.

[0058] like Figure 1As shown, the base plate 10 is provided with at least one slide rail 11, and the first side plate 20 and the second side plate 30 are both slidably connected to the base plate 10 via the slide rail 11. The slide rail 11 provided on the base plate 10 can be raised from the surface of the base plate 10, or can be a groove on the base plate 10. The embodiment of the present application does not specifically limit the form of the slide rail 11 on the base plate 10. The length of the slide rail 11 provided on the base plate 10 can be the same as the length of the base plate 10 in the direction of the extension line of the slide rail 11, or can be shorter than the length of the base plate 10 in the direction of the extension line of the slide rail 11. When the slide rail 11 on the base plate 10 passes through the entire surface of the base plate 10, in order to prevent the first side plate 20 and / or the second side plate 30 from escaping from the end of the slide rail 11, a baffle 13 can be provided at the position where the side of the base plate 10 meets the slide rail 11. The baffle 13 is used to prevent the first side plate 20 and / or the second side plate 30 from escaping from the end of the slide rail 11.

[0059] When there is more than one slide rail 11 on the base plate 10, the slide rails 11 are parallel to each other and have the same length. It is understandable that the more slide rails 11 there are on the base plate 10, the more stable the first side plate 20 and the second side plate 30 mounted on the slide rails 11 will be, but the manufacturing cost of the friction testing device 90 will also be higher. Therefore, if Figure 1 As shown, two slide rails 11 are preferably provided on the bottom plate 10 , and the two slide rails 11 are respectively close to an edge of the bottom plate 10 , so that the distance between the two slide rails 11 is larger, providing better stability.

[0060] The first side plate 20 and the second side plate 30 are parallel to each other, and the setting direction of the first side plate 20 and the second side plate 30 is perpendicular to the extension direction of the slide rail 11. When the first side plate 20 and the second side plate 30 slide in the slide rail 11, the first side plate 20 and the second side plate 30 move in the direction perpendicular to their surfaces respectively.

[0061] The first side plate 20 is provided with a first clamping portion, and the second side plate 30 is provided with a second clamping portion. The first clamping portion and the second clamping portion are used to fix the roof assembly 80 to be tested.

[0062] Since it is necessary to install the roof assembly to be tested 80 between the first side panel 20 and the second side panel 30, and to apply pressure or tension to the roof assembly to be tested 80 by changing the distance between the first side panel 20 and the second side panel 30, the first side panel 20 and the second side panel 30 are further provided with clamping portions to clamp the roof assembly to be tested 80, so that the roof assembly to be tested 80 is fixedly connected to the first side panel 20 and the second side panel 30.

[0063] Reference Figure 2 and Figure 3 , Figure 2 A schematic diagram of a roof panel structure provided in an embodiment of the present application is shown. Figure 3The schematic diagram of the structure of a roof fixing assembly provided by an embodiment of the present application is shown. In the embodiment of the present application, the roof assembly 80 to be tested can be composed of a first test piece and a second test piece connected to each other. The first test piece can be as follows: Figure 2 The roof panel 50 shown in FIG. 5 includes tile ribs 52 and panel edge strips 51. The second test piece may be as follows: Figure 3 As shown, a roof fixing assembly 60 is formed by a roof support 62 and a purlin 61 fixedly connected. The shape of the roof support 62 matches the shape of the tile rib 52. The roof support 62 can be inserted from one end of the tile rib 52 into the inner side of the tile rib 52 to connect with the tile rib 52. In the embodiment of the present application, a first test piece and two second test pieces can be combined to form a roof assembly 80 to be tested. Then, one of the first test pieces of the roof assembly 80 to be tested is connected to the first clamping portion on the first side panel 20, and the other first test piece of the roof assembly 80 to be tested is connected to the second clamping portion on the second side panel 30.

[0064] Reference Figure 4 , shows a schematic diagram of the installation of a first DUT provided in an embodiment of the present application, such as Figure 4 As shown, in the case where the first test piece is a roof panel 50, the first clamping portion on the first side panel 20 fixes the roof panel 50 to the first side panel 20 by clamping the panel edge strip 51 of the roof panel 50, and the second clamping portion on the second side panel 30 fixes the roof panel 50 to the second side panel 30 by clamping the panel edge strip 51 of the roof panel 50.

[0065] The force applying member 40 is connected to the first side plate 20 and the second side plate 30 . The force applying member 40 is used to adjust the distance between the two side plates so that the first clamping portion and the second clamping portion apply force to the roof assembly 80 to be tested.

[0066] like Figure 1As shown, the first side panel 20 and the second side panel 30 are connected by at least one force-applying member 40, and the two ends of a force-applying member 40 are respectively connected to the first side panel 20 and the second side panel 30. The connection position of the force-applying member 40 and the first side panel 20 is provided with two clamping nuts 44 that pass through the force-applying member 40 and are respectively located on both sides of the first side panel 20. By rotating the clamping nuts 44 on both sides of the first side panel 20, the force-applying member 40 can be moved in the hole of the first side panel 20. At the same time, the connection position of the force-applying member 40 and the second side panel 30 is also provided with two clamping nuts 44 that pass through the force-applying member 40 and are respectively located on both sides of the second side panel 30. By rotating the clamping nuts 44 on both sides of the second side panel 30, the force-applying member 40 can be moved in the hole of the second side panel 30. Furthermore, by adjusting the clamping nuts 44 on both sides of the first side panel 20 and / or the clamping nuts 44 on both sides of the second side panel 30, the length of the force-applying member 40 located between the first side panel 20 and the second side panel 30 can be changed, thereby changing the distance between the first side panel 20 and the second side panel 30. When the roof assembly 80 to be tested is installed between the first side panel 20 and the second side panel 30, by rotating the clamping nuts 44, the first side panel 20 and the second side panel 30 are moved away from each other, thereby applying a tensile force perpendicular to the first side panel 20 and the second side panel 30 to the roof assembly to be tested 80, and the magnitude of the tensile force can be changed. Alternatively, by rotating the clamping nuts 44, the first side panel 20 and the second side panel 30 are moved closer together, thereby applying a compressive force perpendicular to the first side panel 20 and the second side panel 30 to the roof assembly to be tested 80, and the magnitude of the compressive force can be changed. Since the roof assembly 80 to be tested is generally composed of two parts, the position and magnitude of the friction force between the two parts can be changed. By pulling one end of the roof assembly 80 to be tested away from the base plate 10 and the base plate 10, relative sliding occurs between the parts of the roof assembly 80 to be tested, thereby performing a friction test on the roof assembly 80 to be tested.

[0067] like Figure 1 As shown, there are two slide rails 11, which are parallel to each other. Two first sliding feet 21 are provided on one side of the first side panel 20 close to the base plate 10. The distance between the two first sliding feet 21 matches the distance between the two slide rails 11. The two first sliding feet 21 are slidably connected to the base plate 10 via the two slide rails 11. The slide rail 11 can be a recessed structure, that is, the position of the slide groove of the slide rail 11 is lower than the upper surface of the base plate 10. The shape of the first sliding foot 21 matches the recessed structure of the slide rail 11. Since the slide rail 11 extends all the way to the edge of the base plate 10, the first sliding foot 21 can slide from the end of the slide rail 11 into the interior of the slide rail 11 and be fixed by the slide rail 11 in a direction perpendicular to the surface of the base plate 10.

[0068] Two second sliding feet 31 are provided on one side of the second side panel 30, adjacent to the base panel 10. The distance between the two second sliding feet 31 matches the distance between the two slide rails 11, and the two second sliding feet 31 are slidably connected to the base panel 10 via the two slide rails 11. The shape of the second sliding feet 31 matches the recessed structure of the slide rails 11. Since the slide rails 11 extend all the way to the edge of the base panel 10, the second sliding feet 31 can slide from the end of the slide rail 11 into the interior of the slide rail 11 and be secured by the slide rail 11 in a direction perpendicular to the surface of the base panel 10.

[0069] Furthermore, in order to prevent the first slide foot 21 and / or the second slide foot 31 from accidentally falling off the slide rail 11, a baffle 13 can be set at both ends of each slide rail 11. The baffle 13 can be connected to the side of the base plate 10 using fasteners such as screws. The baffle 13 is used to block the two ends of the slide rail 11 to prevent the first slide rail 11 and / or the second slide rail 11 from sliding out of the slide groove.

[0070] like Figure 1 As shown, the device may further include a first pressure plate 22 and a second pressure plate 32; the first side plate 20 is provided with a first mounting port 23, and the second side plate 30 is provided with a second mounting port 33; the first pressure plate 22 is located on the surface of the first side plate 20 close to the first mounting port 23, and the first pressure plate 22 is connected to the first side plate 20 by fasteners, and the first pressure plate 22 and the first side plate 20 form a first clamping portion.

[0071] Since the roof assembly 80 to be tested may be of irregular shape, in order to facilitate the installation of the roof assembly 80 to be tested between the first side panel 20 and the second side panel 30, a first mounting opening 23 may be provided on the first side panel 20, and a second mounting opening 33 may be provided on the second side panel 30. The sizes of the first mounting opening 23 and the second mounting opening 33 may be flexibly set according to the shape and size of the roof assembly 80 to be tested, and are not particularly limited in the embodiments of the present application.

[0072] The first pressing plate 22 is used to fix the roof assembly 80 to be tested on the first side panel 20. The first pressing plate 22 can be placed on the side of the first side panel 20 close to the second side panel 30, or on the side of the first side panel 20 away from the second side panel 30. When the first pressing plate 22 is fixedly connected to the first side panel 20 by fasteners, a first clamping portion can be formed between the first pressing plate 22 and the first side panel 20, and the first clamping portion can be used to clamp the roof assembly 80 to be tested. Furthermore, the number of first pressing plates 22 can be greater than one. For example, a first pressing plate 22 can be provided on both sides of the installation opening of the first side panel 20, or multiple first pressing plates 22 can be provided around the installation opening of the first side panel 20.

[0073] The second pressing plate 32 is located on the surface of the second side plate 30 near the second mounting opening 33 . The second pressing plate 32 is connected to the second side plate 30 via fasteners. The second pressing plate 32 and the second side plate 30 form a second clamping portion.

[0074] The second pressing plate 32 is used to fix the roof assembly 80 to be tested on the second side panel 30. The second pressing plate 32 can be placed on the side of the second side panel 30 close to the first side panel 20, or on the side of the second side panel 30 away from the first side panel 20. When the second pressing plate 32 is fixedly connected to the second side panel 30 by fasteners, a second clamping portion can be formed between the second pressing plate 32 and the second side panel 30. The second clamping portion can be used to clamp the roof assembly 80 to be tested. Furthermore, the number of second pressing plates 32 can be greater than one. For example, a second pressing plate 32 can be provided on both sides of the installation opening of the second side panel 30, or multiple second pressing plates 32 can be provided around the installation opening of the second side panel 30.

[0075] Since the friction testing device 90 will pull the roof assembly 80 to be tested during operation, part of the workpiece in the roof assembly 80 to be tested will be displaced between the first side panel 20 and the second side panel 30. In order to allow the roof assembly 80 to be tested to move smoothly between the first side panel 20 and the second side panel 30 and avoid interference between the roof assembly 80 to be tested and parts on the first side panel 20 and the second side panel 30, a first mounting plate 24 can be provided on the first side panel 20 and a second mounting plate 34 can be provided on the second side panel 30 so that the installation position of the roof assembly 80 to be tested is away from the first side panel 20 and the second side panel 30.

[0076] like Figure 1 As shown, the friction testing device 90 may further include a first mounting plate 24, a first pressure plate 22, a second mounting plate 34 and a second pressure plate 32; the first mounting plate 24 is arranged parallel to the first side plate 20, and the first mounting plate 24 may be fixedly connected to the first side plate 20 by at least one connecting member 26 located at the edge of the first pressure plate 22, so that the first mounting plate 24 protrudes from the surface of the first side plate 20 close to the second side plate 30.

[0077] The first side panel 20 further includes a first installation window 25, and the second side panel 30 further includes a second installation window 35. The first installation window 25 matches the shape and size of the first pressure plate 22 and is used to pass the roof assembly 80 to be tested. When installing the first installation plate 24 on the first side panel 20, it is necessary to provide a first installation window 25 on the first side panel 20 that matches the size and shape of the first installation plate 24. The first installation plate 24 can be connected to the first side panel 20 via a connector 26, so that the first installation plate 24 is closer to the second side panel 30 than the first side panel 20. It should be noted that in the scheme where the first installation plate 24 is provided on the first side panel 20, the first installation opening 23 needs to be provided on the first installation plate 24. However, the first side panel 20 does not need to be provided with the first installation opening 23, but does need to be provided with the first installation window 25.

[0078] The first mounting plate 24 is further provided with a first mounting opening 23. The first pressing plate 22 is located on the surface of the first mounting plate 24 near the first mounting opening 23. The first pressing plate 22 is connected to the first mounting plate 24 via fasteners, and the first pressing plate 22 and the first mounting plate 24 form a first clamping portion. Since the first mounting opening 23 is provided on the first mounting plate 24 in the solution including the first mounting plate 24, the first pressing plate 22 is also provided on the first mounting plate 24 in the solution including the first mounting plate 24, and a first clamping portion is formed between the first pressing plate 22 and the first mounting plate 24.

[0079] like Figure 1 As shown, the second mounting plate 34 is arranged parallel to the second side plate 30, and the second mounting plate 34 is fixedly connected to the second side plate 30 by at least one connecting member 26 located at the edge of the second pressure plate 32, so that the second mounting plate 34 protrudes from the surface of the second side plate 30 close to the first side plate 20.

[0080] The second mounting window 35 matches the shape and size of the second pressure plate 32 and is used to pass the roof assembly 80 to be tested. When installing the second mounting plate 34 on the second side panel 30, a second mounting window 35 matching the size and shape of the second mounting plate 34 is required on the second side panel 30. The second mounting plate 34 can be connected to the second side panel 30 via the connector 26, so that the second mounting plate 34 is closer to the first side panel 20 than the second side panel 30. It should be noted that in the scheme where the second mounting plate 34 is provided on the second side panel 30, the second mounting opening 33 is required to be provided on the second mounting plate 34. However, the second side panel 30 does not need to be provided with the second mounting opening 33, but does need to be provided with the second mounting window 35.

[0081] The second mounting plate 34 is further provided with a second mounting opening 33. The second pressing plate 32 is located on the surface of the second mounting plate 34 near the second mounting opening 33. The second pressing plate 32 is connected to the second mounting plate 34 via fasteners, and the second pressing plate 32 and the second mounting plate 34 form a second clamping portion. Since the second mounting opening 33 is provided on the second mounting plate 34 in the solution including the second mounting plate 34, the second pressing plate 32 is also provided on the second mounting plate 34 in the solution including the second mounting plate 34, forming a second clamping portion between the second pressing plate 32 and the second mounting plate 34.

[0082] like Figure 1 As shown, there are four force-applying members 40; two of the force-applying members 40 are respectively connected to two groups of oppositely arranged first sliding feet 21 and second sliding feet 31; two first connecting plates 27 are also provided on the side of the first side plate 20 away from the bottom plate 10, and two second connecting plates 37 are also provided on the side of the second side plate 30 away from the bottom plate 10; the other two force-applying members 40 are respectively connected to the two groups of oppositely arranged first connecting plates 27 and second connecting plates 37.

[0083] In order to ensure that the force-applying member 40 applies a more balanced force to the first side plate 20 and the second side plate 30 during the process of pulling or supporting the first side plate 20 and the second side plate 30, and to prevent the first side plate 20 and the second side plate 30 from deviating from a parallel state, the number of force-applying members 40 can be four, respectively provided at the four corners of the first side plate 20 and the second side plate 30. By providing four force-applying members, the readings of the stress sensors on each force-applying member can be made consistent when the magnitude of the force applied by each force-applying member is adjusted, thereby ensuring that each position between the first side plate and the second side plate is subjected to a balanced force, preventing deflection between the first side plate and the second side plate, and maintaining a parallel state at all times. During a friction test, the component to be tested can be subjected to a more uniform friction force, thus preventing uneven wear.

[0084] like Figure 1 As shown, each force-applying member 40 includes a first screw 41, a second screw 42, and a stress sensor 43; the first screw 41 is connected to one end of the stress sensor 43, and the second screw 42 is connected to the other end of the stress sensor 43. The first screw 41 is connected to the first side plate 20, the second screw 42 is connected to the second side plate 30, and the stress sensor 43 is connected to the first screw 41 and the second screw 42. In this way, the stress sensor 43 can measure the pulling force or the bracing force applied by the force-applying member 40 to the first side plate 20 and the second side plate 30. It should be noted that when multiple force-applying members 40 are provided, the force applied to the first side plate 20 and the second side plate 30 is the sum of the readings of the stress sensors 43 on all the force-applying members 40.

[0085] like Figure 1As shown, each first screw 41 passes through the through hole of the first side plate 20 and is connected to the first side plate 20 through nuts located on both sides of the through hole, and each second screw 42 passes through the through hole of the second side plate 30 and is connected to the second side plate 30 through nuts located on both sides of the through hole.

[0086] like Figure 1 As shown, a chuck 12 is further provided on one side of the bottom plate 10 away from the first side plate 20, and the chuck 12 is used to connect to the tensile testing machine. In the embodiment of the present application, the chuck 12 can specifically be a T-shaped metal plate, the flat end of the T-shaped metal plate is connected to the bottom plate 10 via a fastener, and the protruding end of the T-shaped metal plate is connected to the tensile testing machine. At the same time, in order to ensure that the bottom plate 10 is subjected to a balanced force, the position of the chuck 12 is preferably set in the center of the bottom plate 10. It should be noted that the shape, material and setting position of the chuck 12 can be flexibly adjusted according to actual conditions, and the embodiment of the present application does not specifically limit this.

[0087] A tensile testing machine is a device that can apply force in all directions. By setting the parameters of the tensile testing machine, technicians can make the tensile testing machine output forces in different directions, sizes and frequencies.

[0088] Reference Figure 5 , Figure 5 A clamp provided in an embodiment of the present application is shown.

[0089] like Figure 5 As shown, the friction testing device 90 also includes a fixture 70 connected to the chuck 12; one end of the fixture 70 is a pit structure 71, and the side wall of the pit structure 71 is provided with a pin 72, which passes through the pit structure 71, and the pit structure 71 is used to connect to the tensile testing machine; the other end of the fixture 70 is relatively provided with a pressing part, which includes two relatively arranged pressing plates 73, a first bolt 74 passing through the two pressing plates 73 and a second bolt 75 passing through the two pressing plates 73, the length of the second bolt 75 is greater than the length of the first bolt 74, and the pressing part is used to connect the chuck 12.

[0090] Since the force provided by the tensile testing machine is relatively large, in order to make the connection between the clamp 70 and the clamp 12 more stable, a plurality of first bolts 74 and / or second bolts 75 may be provided, for example, Figure 5 As shown, the clamp 70 includes two first bolts 74. Since the space of the clamp 70 is limited, when more bolts are set, the distance between the bolts is close, and it is difficult to use fastening tools such as socket wrenches to rotate the bolts. Therefore, a second bolt 75 with a length greater than the first bolt 74 can be set so that adjacent bolts are on different planes, which is convenient for technicians to operate the bolts.

[0091] In an embodiment of the present application, the friction testing device 90 includes: a base plate 10, a first side plate 20 and a second side plate 30 connected to the base plate 10 and arranged opposite to each other, and at least one force-applying member 40; the base plate 10 is provided with at least one slide rail 11, and the first side plate 20 and the second side plate 30 are both slidably connected to the base plate 10 through the slide rail 11; the first side plate 20 is provided with a first clamping portion, and the second side plate 30 is provided with a second clamping portion, and the first clamping portion and the second clamping portion are used to fix the roof assembly 80 to be tested; the force-applying member 40 is connected to the first side plate 20 and the second side plate 30, and the force-applying member 40 is used to adjust the distance between the two side plates so that the first clamping portion and the second clamping portion apply a force to the roof assembly 80 to be tested. The roof assembly 80 to be tested can be clamped between the first side plate 20 and the second side plate 30 of the friction testing device 90. Since the first side plate 20 and the second side plate 30 are slidingly connected to the base plate 10, the distance between the first side plate 20 and the second side plate 30 can be adjusted by the force-applying member 40, thereby changing the force magnitude and direction of the roof assembly 80 to be tested, making it convenient to adjust the friction magnitude between the various components in the roof assembly 80 to be tested, and making it convenient for technicians to perform friction tests on the roof assembly 80 to be tested.

[0092] Reference Figure 6 , Figure 6 A friction test method step flow chart provided in an embodiment of the present application is shown as follows: Figure 6 As shown, the friction test methods include:

[0093] Step 601: fix two first DUTs to the first clamping portion and the second clamping portion respectively.

[0094] In an embodiment of the present application, the roof assembly 80 to be tested can be composed of a first piece to be tested and a second piece to be tested, and the first piece to be tested and the second piece to be tested are slidingly connected. The friction testing device 90 is used to cause sliding friction between the first piece to be tested and the second piece to be tested, so that the tester can observe the impact of friction on the first piece to be tested and the second piece to be tested.

[0095] Specifically, such as Figure 2 As shown, the first test piece can be a roof panel 50, and the first clamping portion on the first side panel 20 fixes the roof panel 50 to the first side panel 20 by clamping the panel edge strip 51 of the roof panel 50, and the second clamping portion on the second side panel 30 fixes the roof panel 50 to the second side panel 30 by clamping the panel edge strip 51 of the roof panel 50. Figure 4 FIG. 1 is a schematic diagram showing that only the roof panel 50 is installed on the friction testing device 90 .

[0096] Step 602 : Slidingly connect one end of the second DUT to one of the first DUTs, and slidingly connect the other end of the second DUT to another first DUT.

[0097] Both ends of the second test piece are slidably connected to a first test piece respectively. Thus, the two first test pieces and the second test piece together constitute a roof assembly 80 to be tested.

[0098] like Figure 3 As shown, the second DUT can be a roof fixing assembly 60, comprising a purlin 61 and two roof supports 62 connected symmetrically to the purlin 61. The roof supports 62 match the shape of the roof panel 50. It should be noted that when the first DUT is the roof panel 50 and the second DUT is composed of the roof supports 62 and the purlin 61, due to the special structure of the roof panel 50, the first and second DUTs must be combined before the first DUT can be fixed between the first side panel 20 and the second side panel 30.

[0099] Reference Figure 7 , Figure 7 The present invention provides an assembly diagram of a roof assembly to be tested and a friction testing device according to an embodiment of the present invention. When the first test piece of the roof assembly 80 to be tested is a roof panel 50 and the second test piece of the roof assembly 80 to be tested is a roof fixing assembly 60, the roof supports 62 can be installed on both sides of the purlin 61 to form a second test piece. Then, the two roof supports 62 on the second test piece are respectively passed through the tile rib 52 of a roof panel 50 to complete the connection between the roof supports 62 and the roof panel 50. Then, the clamping nut 44 on the force applying member 40 is loosened to make the first side panel 20 and the second side panel 20 connected. The panel 30 can move freely in the slide rail 11, and then the panel edge strip 51 of one roof panel 50 is placed between the first side panel 20 or the first mounting plate 24 and the first pressure plate 22, so that the panel edge strip 51 of one roof panel 50 is clamped by the first clamping portion on the first side panel 20; at the same time, the panel edge strip 51 of another roof panel 50 is placed between the second side panel 30 or the second mounting plate 34 and the second pressure plate 32, so that the panel edge strip 51 of the other roof panel 50 is clamped by the second clamping portion on the second side panel 30. In this way, the assembly of the roof assembly 80 to be tested and the friction testing device 90 can be completed.

[0100] Step 603: Adjust the length of the force applying member between the first side plate and the second side plate so that the first clamping portion and the second clamping portion pull or compress the ends of the roof assembly to be tested, thereby changing the friction force and / or friction position between the second test piece and the first test piece.

[0101] After the roof assembly 80 to be tested is assembled with the friction testing device 90, the clamping nut 44 on the force-applying member 40 can be rotated to cause the first side panel 20 and the second side panel 30 to move closer to or away from each other, thereby causing the first side panel 20 and the second side panel 30 to apply pressure or tension to the roof assembly 80 to be tested.

[0102] Optionally, step 603 may further include:

[0103] Sub-step 6031, adjusting the length of the force-applying member between the first side plate and the second side plate according to the readings of the stress sensors located on the force-applying member, so that the sum of the readings of the stress sensors on all the force-applying members reaches a preset stress value.

[0104] The force-applying member 40 is composed of a stress sensor 43 connecting a first screw 41 and a second screw 42. The first screw 41 is connected to the first side plate 20, and the second screw 42 is connected to the second side plate 30. Therefore, the stress sensor 43 can reflect the magnitude and direction of the force between the first side plate 20 and the second side plate 30.

[0105] Furthermore, the pressure or tension applied to the roofing assembly 80 to be tested can be adjusted to a desired level by observing the readings of the stress sensors 43 on the force-applying member 40. Specifically, the clamping nut 44 on the force-applying member 40 can be adjusted based on the readings of the stress sensors 43 on the force-applying member 40, causing a slight change in the length of the force-applying member 40 between the first side panel 20 and the second side panel 30. This allows the sum of the readings of the stress sensors 43 on all force-applying members 40 to reach a preset stress value. The readings of the stress sensors 43 on all force-applying members 40 are then added together to obtain the magnitude of the force applied between the first side panel 20 and the second side panel 30.

[0106] Step 604 : Apply force to the second DUT and the base plate to generate relative displacement between the second DUT and the first DUT.

[0107] Because the friction testing device 90 and the first test piece are fixedly connected, while the first test piece and the second test piece are slidingly connected, the first test piece and the friction testing device 90 can be simultaneously pulled in opposite directions, or simultaneously pushed in opposite directions, to cause relative sliding between the first and second test pieces. This allows technicians to observe the friction between the first and second test pieces under a set pressure.

[0108] In order to conduct friction tests efficiently and quickly, Figure 5 The fixture 70 shown connects the second test piece and / or the base plate 10 of the friction testing device 90 to the tensile testing machine, and the tensile testing machine causes sliding between the first test piece and the second test piece. In this way, the wear of the first test piece and the second test piece caused by friction can be observed in a relatively short period of time.

[0109] In an embodiment of the present application, the friction testing method includes: fixing two first test pieces to the first clamping portion and the second clamping portion, respectively; slidingly connecting one end of the second test piece to one first test piece, and slidingly connecting the other end of the second test piece to the other first test piece; adjusting the length of the force-applying member 40 between the first side plate 20 and the second side plate 30 so that the first clamping portion and the second clamping portion pull or compress the two ends of the roof assembly 80 to be tested, so as to change the magnitude of the friction force and / or the friction position between the second test piece and the first test piece; applying a force to the second test piece and the base plate 10 so as to cause a relative displacement between the second test piece and the first test piece. The roof assembly 80 to be tested can be clamped between the first side panel 20 and the second side panel 30. Since the first side panel 20 and the second side panel 30 are slidably connected to the bottom panel 10, the distance between the first side panel 20 and the second side panel 30 can be adjusted by the force-applying member 40, thereby changing the magnitude and direction of the force applied to the roof assembly 80 to be tested, making it easy to adjust the magnitude of the friction between the various components in the roof assembly 80 to be tested, and making it convenient for technicians to perform friction tests on the roof assembly 80 to be tested.

[0110] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0111] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are protected by the present invention.

Claims

1. A friction testing method, characterized in that: The friction testing method is applied to a friction testing device, which includes: a bottom plate, a first side plate and a second side plate connected to and opposite to the bottom plate, and at least one force applying member; The bottom plate is provided with at least one slide rail, and the first side plate and the second side plate are both slidably connected to the bottom plate via the slide rail; A first pressing plate and a second pressing plate; the first side plate is provided with a first mounting opening, and the second side plate is provided with a second mounting opening; The first pressing plate is located on the surface of the first side plate near the first mounting opening, the first pressing plate is connected to the first side plate via a fastener, and the first pressing plate and the first side plate form a first clamping portion; the second pressing plate is located on the surface of the second side plate near the second mounting opening, the second pressing plate is connected to the second side plate via a fastener, and the second pressing plate and the second side plate form a second clamping portion, and the first clamping portion and the second clamping portion are used to fix the roof assembly to be tested; The force applying member is connected to the first side plate and the second side plate, and the force applying member is used to adjust the distance between the two side plates so that the first clamping portion and the second clamping portion apply a force to the roof assembly to be tested; The method comprises: Fixing two first test pieces to the first clamping part and the second clamping part respectively; Slidingly connecting one end of a second piece to be tested to one of the first pieces to be tested, and slidingly connecting the other end of the second piece to be tested to another of the first pieces to be tested; Adjusting the length of the force-applying member between the first side plate and the second side plate so that the first clamping portion and the second clamping portion pull or compress the two ends of the roof assembly to be tested, thereby changing the magnitude of the friction force and / or the friction position between the second test piece and the first test piece; A force is applied to the second piece to be tested and the bottom plate to generate a relative displacement between the second piece to be tested and the first piece to be tested.

2. The method according to claim 1, characterized in that There are two slide rails, and the two slide rails are parallel to each other; Two first sliding feet are provided on one side of the first side plate close to the bottom plate, the distance between the two first sliding feet matches the distance between the two slide rails, and the two first sliding feet are slidably connected to the bottom plate through the two slide rails; Two second sliding feet are provided on one side of the second side plate close to the bottom plate, the distance between the two second sliding feet matches the distance between the two slide rails, and the two second sliding feet are slidably connected to the bottom plate through the two slide rails.

3. The method according to claim 1, characterized in that The device further includes a first mounting plate and a second mounting plate; The first mounting plate is arranged parallel to the first side plate, and the first mounting plate is fixedly connected to the first side plate via at least one connecting member located at an edge of the first pressure plate, so that the first mounting plate protrudes from a surface of the first side plate close to the second side plate; The first pressing plate is located on the surface of the first mounting plate near the first mounting opening, the first pressing plate is connected to the first mounting plate via a fastener, and the first pressing plate and the first mounting plate form the first clamping portion; The second mounting plate is arranged parallel to the second side plate, and the second mounting plate is fixedly connected to the second side plate via at least one connecting member located at an edge of the second pressure plate, so that the second mounting plate protrudes from a surface of the second side plate close to the first side plate; The second pressing plate is located on the surface of the second mounting plate near the second mounting opening. The second pressing plate is connected to the second mounting plate via a fastener. The second pressing plate and the second mounting plate form the second clamping portion.

4. The method according to claim 3, characterized in that The first side panel further includes a first installation window, and the second side panel further includes a second installation window; The first installation window matches the shape and size of the first pressure plate, and the first installation window is used to pass the roof assembly to be tested; The second installation window matches the shape and size of the second pressing plate, and the second installation window is used for passing the roof assembly to be tested.

5. The method according to claim 1, wherein The number of the force applying members is four; The two force applying members are respectively connected to two sets of first sliding feet and second sliding feet arranged opposite to each other; Two first connecting plates are further provided on a side of the first side plate away from the bottom plate, and two second connecting plates are further provided on a side of the second side plate away from the bottom plate; The other two force-applying members are respectively connected to two groups of the first connecting plates and the second connecting plates that are arranged opposite to each other.

6. The method according to claim 1, characterized in that The force applying member includes a first screw, a second screw and a stress sensor; The first screw is connected to one end of the stress sensor, and the second screw is connected to the other end of the stress sensor.

7. The method according to claim 6, characterized in that Each first screw rod passes through the through hole of the first side plate and is connected to the first side plate through the clamping nuts located on both sides of the through hole. Each second screw rod passes through the through hole of the second side plate and is connected to the second side plate through the clamping nuts located on both sides of the through hole.

8. The method according to claim 1, characterized in that A chuck is further provided on a side of the bottom plate facing away from the first side plate, and the chuck is used to connect to a tensile testing machine.

9. The method according to claim 8, characterized in that The friction testing device also includes a fixture connected to the chuck; One end of the fixture is a pit structure, a side wall of the pit structure is provided with a bayonet, the bayonet passes through the pit structure, and the pit structure is used to connect to the tensile testing machine; A pressing portion is relatively arranged at the other end of the clamp, and the pressing portion includes two relatively arranged pressing plates, a first bolt passing through one of the pressing plates, and a second bolt passing through one of the pressing plates, the length of the second bolt is greater than the length of the first bolt, and the pressing portion is used to connect the chuck.

10. The method according to claim 1, characterized in that The adjusting the length of the force applying member between the first side plate and the second side plate comprises: According to the readings of the stress sensors located on the force-applying member, the length of the force-applying member between the first side plate and the second side plate is adjusted so that the sum of the readings of the stress sensors on all the force-applying members reaches a preset stress value.

11. The method according to claim 1, wherein The applying a force to the second DUT and the bottom plate to generate a relative displacement between the second DUT and the first DUT, includes: Connecting the chuck on the bottom plate to the tensile testing machine and fixing one end of the second test piece; The tensile testing machine applies a force to the bottom plate, so that the first test piece is driven by the bottom plate to generate relative displacement with the second test piece, thereby generating friction between the first test piece and the second test piece.

12. The method according to claim 1, characterized in that The first piece to be tested includes a roof panel, and the second piece to be tested is composed of a purlin and a roof panel fixing support installed on the purlin.

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