Tensile system and test device for measuring the tension of fasteners

Abstract

The utility model discloses a stretching system and a testing device capable of measuring the tension of a fastener, comprising a fastener stretching mechanism located in a first frame and a tension detection mechanism located in a second frame, wherein the fastener stretching mechanism comprises a stretcher body, and the tension detection mechanism comprises a first fixed plate, a second fixed plate, a pressure sensing device, a slide rail, and a tension calculation module; when hydraulic pressure is applied to the inside of the stretcher body, the stretcher body stretches the fastener to be measured, and at the same time applies pressure to the second fixed plate in the direction of the first fixed plate, and the tension calculation module obtains the tension applied by the stretcher body to the fastener to be measured according to the pressure information transmitted by the pressure sensing device. The stretching system has a high degree of integration, can accurately control the stretching force of the fastener, and can timely obtain the tension value of the fastener under the stretching force. Material property testing components, such as acoustic sensors, can also be added to test the acoustic properties of the fastener under different tensions.

Description

Technical Field

[0001] The utility model relates to the field of tension testing of fasteners, in particular to a stretching system and a testing device capable of measuring the tension of fasteners. Background Art

[0002] Currently commonly used fasteners, such as bolts, need to be tested for their tensile strength during the production process to determine whether they meet the standards.

[0003] However, the testing of fasteners is not only about their tensile strength, but also includes ultrasonic preload testing, fastener yield testing, etc. Both of these tests apply an auxiliary force to the fasteners (i.e., apply tension to the fasteners). Under the applied force, the material characteristics of the fasteners are collected under different forces, such as acoustic properties, mechanical properties, etc.

[0004] However, existing testing devices, such as standard testing machines, are large in size, high in cost, and inconvenient to move. Utility Model Content

[0005] The utility model aims to provide a stretching system and a testing device capable of measuring the tension of a fastener, so as to solve the problems of the existing stretching system being large in size, high in cost, and inconvenient to move.

[0006] To achieve one of the above-mentioned purposes of the utility model, an embodiment of the utility model provides a stretching system capable of measuring the tension of a fastener, comprising a first frame, a second frame, a fastener stretching mechanism disposed in the first frame, and a tension detection mechanism disposed in the second frame, wherein the fastener stretching mechanism and the tension detection mechanism are connected to each other and the tension detection mechanism is disposed in the stretching direction of the fastener stretching mechanism;

[0007] The fastener stretching mechanism comprises a stretcher body, the stretcher body is a cylinder structure, and a hollow area running through the length direction of the stretcher body is arranged in the central area of ​​the stretcher body, and the hollow area is used to place the fastener to be tested;

[0008] The tension detection mechanism includes a first fixed plate, a second fixed plate, a pressure sensing device, a slide rail and a tension calculation module, the slide rail is fixedly arranged in the second frame and passes through the diagonal positions of the first fixed plate and the second fixed plate, the first fixed plate and the second fixed plate can move in the second frame through the slide rail, the second fixed plate is connected to the stretcher body, and the first fixed plate is arranged on a side of the second fixed plate away from the stretcher body; the pressure sensing device is arranged between the first fixed plate and the second fixed plate and connects the first fixed plate and the second fixed plate; the tension calculation module is electrically connected to the pressure sensing device;

[0009] Among them, when hydraulic pressure is applied to the interior of the stretcher body, the stretcher body stretches the fastener to be tested, and at the same time applies pressure to the second fixing plate in the direction of the first fixing plate, and the tension calculation module calculates and obtains the tension applied by the stretcher body to the fastener to be tested based on the pressure information transmitted by the pressure sensing device.

[0010] As a further improvement of an embodiment of the utility model, the stretcher body is a hydraulic cylinder.

[0011] As a further improvement of an embodiment of the utility model, the stretcher body further includes an interface, and the stretching system further includes a hydraulic pump, which is detachably connected to the interface, and the hydraulic pump applies hydraulic pressure to the inside of the stretcher body through the interface.

[0012] As a further improvement of an embodiment of the utility model, the fastener stretching mechanism also includes a fixing member for fixing the fastener to be tested to the hollow area.

[0013] As a further improvement of an embodiment of the utility model, the tension detection mechanism also includes an elastic component, which is arranged on the slide rail, and one end of the elastic component is connected to the second frame, and the other end is connected to the first fixing plate.

[0014] As a further improvement of an embodiment of the utility model, the first fixing plate, the second fixing plate and the central area of ​​the pressure sensing device are provided with a first through hole corresponding to the hollow area and having the same diameter as the hollow area. When the fastener to be tested is placed in the hollow area, a portion of the fastener to be tested in its length direction can extend along the first through hole to the side of the first fixing plate away from the stretcher body.

[0015] As a further improvement of an embodiment of the utility model, the tension detection mechanism also includes a flange gasket, a second through hole is arranged in the central area of ​​the flange gasket, the second through hole is arranged concentrically with the first through hole, and the flange gasket is arranged in a partial area of ​​the fastener to be tested extending on the side of the first fixing plate away from the tensioner body.

[0016] As a further improvement of an embodiment of the utility model, the stretching system further comprises a base fixedly connecting the first frame and the second frame, and the base extends from the end of the first frame toward a side away from the second frame;

[0017] The stretching system further comprises a support seat and a pulley. The support seat is fixedly arranged at one end of the lower surface of the base, and the pulley is fixedly arranged at the other end of the lower surface of the base.

[0018] To achieve one of the above-mentioned purposes of the utility model, an embodiment of the utility model provides a testing device, including a material property testing assembly and a tensile system capable of measuring the tension of a fastener as described above, wherein the material property testing assembly includes a material property testing sensing device and a material property data acquisition module;

[0019] The material property test sensor device is connected to an end surface of the fastener to be tested;

[0020] The material property data acquisition module is electrically connected to the material property test sensor device and is used to obtain test data of the fastener to be tested by the material property test sensor device.

[0021] As a further improvement of an embodiment of the utility model, the material property testing sensor device is configured as an acoustic sensor.

[0022] The beneficial effect of the utility model is that the utility model provides a stretching system capable of measuring the tension of a fastener, the system has a high degree of integration, can accurately control the tension of the fastener, and can timely obtain the tension value of the fastener under the tension. In addition, on the basis of the stretching system provided by the utility model, some material property testing components, such as acoustic sensors, etc., can be added to test the acoustic properties of the fastener under different tensions. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of a tensioning system capable of measuring the tension of a fastener in one embodiment of the utility model;

[0024] Figure 2 This is a schematic diagram of the structure of a tensile system capable of measuring the tension of a fastener in one embodiment of the utility model (excluding flange gaskets);

[0025] Figure 3 It is a structural schematic diagram of another perspective of a stretching system capable of measuring the tension of a fastener in one embodiment of the utility model;

[0026] Figure 4 A top view of a tensile system structure capable of measuring the tension of a fastener in one embodiment of the utility model;

[0027] Figure 5 A side cross-sectional view of a first frame and a fastener tensioning mechanism disposed in the first frame in one embodiment of the utility model;

[0028] Figure 6 It is a test cross-sectional view of a second frame and a tension detection mechanism disposed in the second frame in one embodiment of the utility model. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in combination with the specific implementation methods of this application and the corresponding drawings. Obviously, the described implementation methods are only part of the implementation methods of this application, not all of the implementation methods. Based on the implementation methods in this application, all other implementation methods obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0030] 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 elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0031] The utility model provides a stretching system capable of measuring the tension of a fastener, comprising a first frame, a second frame, a fastener stretching mechanism arranged in the first frame and a tension detection mechanism arranged in the second frame, the fastener stretching mechanism and the tension detection mechanism are connected to each other and the tension detection mechanism is arranged in the stretching direction of the fastener stretching mechanism; the fastener stretching mechanism comprises a stretcher body, the stretcher body is a cylinder structure, and a hollow area running through the length direction of the stretcher body is arranged in the central area of ​​the stretcher body, and the hollow area is used to place the fastener to be tested; the tension detection mechanism comprises a first fixed plate, a second fixed plate, a pressure sensing device, a slide rail and a tension calculation module, the slide rail is fixedly arranged in the second frame and the slide rail passes through the It is arranged at the diagonal position of the first fixed plate and the second fixed plate, the first fixed plate and the second fixed plate can move in the second frame through the slide rail, the second fixed plate is connected to the stretcher body, and the first fixed plate is arranged on the side of the second fixed plate away from the stretcher body; the pressure sensing device is arranged between the first fixed plate and the second fixed plate and connects the first fixed plate and the second fixed plate; the tension calculation module is electrically connected to the pressure sensing device; wherein, when hydraulic pressure is applied to the inside of the stretcher body, the stretcher body stretches the fastener to be measured, and at the same time applies pressure to the second fixed plate in the direction of the first fixed plate, and the tension calculation module calculates and obtains the tension applied by the stretcher body to the fastener to be measured according to the pressure information transmitted by the pressure sensing device.

[0032] Combination Figure 1-Figure 6This embodiment provides a stretching system capable of measuring the tension of a fastener, comprising a first frame 10, a second frame 20, a fastener stretching mechanism disposed in the first frame 10, and a tension detection mechanism disposed in the second frame 20. Specifically, the fastener stretching mechanism and the tension detection mechanism are connected to each other and the tension detection mechanism is disposed in the stretching direction of the fastener stretching mechanism. When the fastener stretching mechanism starts to work and acts on the fastener to be measured to stretch, the tension detection mechanism can detect and obtain the tension exerted on the fastener to be measured.

[0033] In this embodiment, the first frame 10 and the second frame 20 are assembled from long strips of aluminum profiles, and the profiles are fixed and installed using screws and angle brackets.

[0034] The fastener stretching mechanism includes a stretcher body 30, which is a cylinder structure, and a hollow area 31 is arranged in the center area of ​​the stretcher body 30 and runs through the length direction thereof, and the hollow area 31 is used for placing the fastener to be tested.

[0035] Of course, the fastener stretching mechanism also includes a connector that fixes the stretcher body 30 and the first frame 10, such as a clamp or other components.

[0036] Specifically, the stretcher body 30 is a hydraulic cylinder. When hydraulic pressure is applied to the hydraulic cylinder, the surface of the hydraulic cylinder body is stretched by the hydraulic pressure, and the fastener to be tested disposed in the hollow area 31 is stretched by the tension of the hydraulic cylinder surface.

[0037] More specifically, the stretcher body 30 further includes an interface 32, and the stretching system further includes a hydraulic pump, which is detachably connected to the interface 32 of the stretcher body 30. When the hydraulic pump is connected to the interface of the stretcher body, the hydraulic pump can apply hydraulic pressure to the inside of the stretcher body 30 through the interface 32.

[0038] Furthermore, the fastener stretching mechanism also includes a fixing member for fixing the fastener to be tested to the hollow area 31 .

[0039] In this embodiment, the fastener to be tested is a bolt, and the fixing member for fixing the bolt to the hollow area 31 in the main body of the tensioner is a pull sleeve.

[0040] The tension detection mechanism includes a first fixing plate 41 , a second fixing plate 42 , a pressure sensing device 43 , a slide rail 44 and a tension calculation module 45 .

[0041] The slide rail 44 is fixedly arranged in the second frame 20 and penetrates the diagonal positions of the first fixed plate 41 and the second fixed plate 42. The first fixed plate 41 and the second fixed plate 42 can move in the second frame 20 through the slide rail 44. Specifically, the tension detection mechanism is provided with four slide rails 44, and every two slide rails 44 are arranged at the diagonal positions of the first fixed plate 41 and the second fixed plate 42.

[0042] Specifically, the second fixing plate 42 is connected to the stretcher body 30 , and the first fixing plate 41 is disposed on a side of the second fixing plate 42 away from the stretcher body 30 .

[0043] Specifically, the pressure sensing device 43 is disposed between the first fixing plate 41 and the second fixing plate 42 and connects the first fixing plate 41 and the second fixing plate 42. When the stretcher body 30 applies pressure to the second fixing plate 42 in the direction of the first fixing plate 41, the second fixing plate 42 and the first fixing plate 41 can move along the slide rail 44.

[0044] The tension calculation module 45 is electrically connected to the pressure sensing device 43. When hydraulic pressure is applied to the inside of the tensioner body 30, the tensioner body 30 stretches the fastener to be measured, and at the same time, a pressure is applied to the second fixing plate 42 in the direction of the first fixing plate 41. The tension calculation module 45 calculates and obtains the tension value applied by the tensioner body 30 to the fastener to be measured according to the pressure information transmitted by the pressure sensing device 43.

[0045] In this embodiment, the pressure sensing device 43 is configured as a pressure sensor, which converts the deformation information of the strain gauge of the internal sensitive component into pressure information.

[0046] In another embodiment, the pressure sensing device 43 is configured as a pressure transmitter, and the pressure information obtained through its measurement is converted into pressure information.

[0047] The utility model does not limit the specific setting position of the tension calculation module 45 , and the tension calculation module 45 can be set in the second frame 20 as long as it is electrically connected to the pressure sensing device 43 .

[0048] Furthermore, the tension detection mechanism further includes an elastic component 46, which is disposed on the slide rail 44, and one end of the elastic component 46 is connected to the second frame 20, and the other end is connected to the first fixing plate 41. When the second fixing plate 42 is subjected to pressure in the direction toward the first fixing plate 41, the second fixing plate 42 and the first fixing plate 41 move along the slide rail 44, and the setting of the elastic component 46 can buffer the squeezing force between the first fixing plate 41 and the second frame 20.

[0049] In this embodiment, the elastic component 46 is configured as a spring surrounding the slide rail 44 .

[0050] Specifically, the central areas of the first fixing plate 41, the second fixing plate 42 and the pressure sensing device 43 are provided with first through holes 411 (such as Figure 2 When the fastener to be tested is placed in the hollow area 31 of the stretcher body, a portion of the fastener to be tested in the length direction may extend along the first through hole 411 to a side of the first fixing plate 41 away from the stretcher body 30 .

[0051] Further, the tension detection mechanism also includes a flange gasket 47, and a second through hole 471 is provided in the central area of ​​the flange gasket 47, and the second through hole 471 is concentrically arranged with the first through hole 411. Specifically, the diameter of the second through hole 471 can be set to be equal to the diameter of the fastener to be tested. When the fastener to be tested is placed in the hollow area 31 of the tensioner body, the flange gasket 47 is arranged on the side of the fastener to be tested away from the tensioner body 30 on the first fixing plate 41, and the part of the fastener to be tested extending away from the tensioner body 30 is located in the second through hole 471. Specifically, the flange gasket 47 is arranged close to the first fixing plate 41.

[0052] Of course, the present invention does not limit the thickness of the flange gasket 47 and the diameter of the second through hole 471 , and multiple flange gaskets with different thicknesses and second through holes of different diameters can be designed to accommodate fasteners of different sizes to be tested.

[0053] Furthermore, the stretching system also includes a base 50 fixedly connected to the first frame 10 and the second frame 20 , and the base 50 extends from the end of the first frame 10 toward a side away from the second frame 20 .

[0054] In this embodiment, a limiting mechanism 51 is also provided on the upper surface of the base 50 on the side of the first fixed plate 41 away from the stretcher body 30. The limiting mechanism is used to locate the position of the flange gasket 47 to ensure that the second through hole 471 of the flange gasket 47 is concentrically arranged with the center hole of the first through hole 411.

[0055] Furthermore, the stretching system further includes a support seat 60 and a pulley 70. The support seat 60 is fixedly disposed at one end of the lower surface of the base 50, and the pulley 70 is fixedly disposed at the other end of the lower surface of the base 50. When the stretching system is working, the system can be fixed by the support seat 60 to prevent inaccurate calculation of the tensile force value of the fastener to be measured due to the shaking of the system; when the stretching system is not needed, the system can also be moved by the pulley 70 for easy use.

[0056] Specifically, the support seat 60 is arranged on a side of the lower surface of the base 50 away from the stretcher body 30 , and the pulley 70 is arranged on a side of the lower surface of the base 50 close to the stretcher body 30 .

[0057] Of course, the stretching system further includes a baffle connecting the first frame 10 and the second frame 20 .

[0058] The utility model also provides a testing device, comprising a material property testing component and a stretching system capable of measuring the tension of a fastener in any one of the above embodiments, wherein the material property testing component comprises a material property testing sensing device and a material property data acquisition module.

[0059] Specifically, the material property test sensor device is connected to one end face of the fastener to be tested. Of course, the material property test sensor device can be connected to one end face of the fastener to be tested close to the stretcher body, or can be connected to one end face away from the stretcher body.

[0060] Specifically, the material property data acquisition module is electrically connected to the material property test sensor device, and the material property data acquisition module is used to obtain the test data of the material property test sensor device on the fastener to be tested. That is to say, when the tensioner body stretches the fastener to be tested, the fastener to be tested can be stretched with different tension values ​​by controlling the hydraulic pressure injected into the tensioner body. The material properties of the fastener to be tested will change under different tension values, and the material property test sensor device connected to one end of the fastener to be tested can test the material properties of the fastener to be tested under different pressure values.

[0061] For example, the material property test sensor device can be set as an acoustic sensor, which can obtain the acoustic properties of the fastener to be tested under different tensile forces.

[0062] In summary, the utility model provides a stretching system capable of measuring the tension of a fastener. The system has a high degree of integration, can accurately control the tension of the fastener, and can timely obtain the tension value of the fastener under the tension. In addition, on the basis of the stretching system provided by the utility model, some material property testing components, such as acoustic sensors, etc., can be added to test the acoustic properties of the fastener under different tensions.

[0063] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0064] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the utility model. They are not intended to limit the protection scope of the utility model. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A tensioning system capable of measuring the tension of a fastener, characterized in that: The invention comprises a first frame, a second frame, a fastener stretching mechanism arranged in the first frame, and a tension detection mechanism arranged in the second frame, wherein the fastener stretching mechanism and the tension detection mechanism are connected to each other and the tension detection mechanism is arranged in the stretching direction of the fastener stretching mechanism; The fastener stretching mechanism comprises a stretcher body, the stretcher body is a cylinder structure, and a hollow area running through the length direction of the stretcher body is arranged in the central area of ​​the stretcher body, and the hollow area is used to place the fastener to be tested; The tension detection mechanism includes a first fixed plate, a second fixed plate, a pressure sensing device, a slide rail and a tension calculation module, the slide rail is fixedly arranged in the second frame and passes through the diagonal positions of the first fixed plate and the second fixed plate, the first fixed plate and the second fixed plate can move in the second frame through the slide rail, the second fixed plate is connected to the stretcher body, and the first fixed plate is arranged on a side of the second fixed plate away from the stretcher body; the pressure sensing device is arranged between the first fixed plate and the second fixed plate and connects the first fixed plate and the second fixed plate; the tension calculation module is electrically connected to the pressure sensing device; Among them, when hydraulic pressure is applied to the interior of the stretcher body, the stretcher body stretches the fastener to be tested, and at the same time applies pressure to the second fixing plate in the direction of the first fixing plate, and the tension calculation module calculates and obtains the tension applied by the stretcher body to the fastener to be tested based on the pressure information transmitted by the pressure sensing device.

2. The tensioning system capable of measuring the tension of a fastener according to claim 1, characterized in that: The stretcher body is a hydraulic cylinder.

3. The tensioning system capable of measuring the tension of a fastener according to claim 1, characterized in that: The stretcher body further includes an interface, and the stretching system further includes a hydraulic pump, which is detachably connected to the interface and applies hydraulic pressure to the interior of the stretcher body through the interface.

4. The tensioning system capable of measuring the tension of a fastener according to claim 1, characterized in that: The fastener stretching mechanism further includes a fixing member for fixing the fastener to be tested to the hollow area.

5. The tensioning system capable of measuring the tension of a fastener according to claim 1, characterized in that: The tension detection mechanism further includes an elastic component, which is disposed on the slide rail, and one end of the elastic component is connected to the second frame, and the other end of the elastic component is connected to the first fixing plate.

6. The tensioning system capable of measuring the tension of a fastener according to claim 1, characterized in that: A first through hole corresponding to the hollow area and having the same diameter as the hollow area is provided in the central area of ​​the first fixing plate, the second fixing plate and the pressure sensing device. When the fastener to be tested is placed in the hollow area, a portion of the fastener to be tested in its length direction can extend along the first through hole to the side of the first fixing plate away from the stretcher body.

7. The tensioning system capable of measuring the tension of a fastener according to claim 6, characterized in that: The tension detection mechanism also includes a flange gasket, a second through hole is arranged in the central area of ​​the flange gasket, the second through hole is arranged concentrically with the first through hole, and the flange gasket is arranged in a partial area of ​​the fastener to be tested extending on the side of the first fixing plate away from the tensioner body.

8. The tensioning system capable of measuring the tension of a fastener according to claim 1, characterized in that: The stretching system further comprises a base fixedly connecting the first frame and the second frame, wherein the base extends from an end of the first frame toward a side away from the second frame; The stretching system further comprises a support seat and a pulley. The support seat is fixedly arranged at one end of the lower surface of the base, and the pulley is fixedly arranged at the other end of the lower surface of the base.

9. A testing device, characterized in that: It comprises a material property test component and a tensile system capable of measuring the tension of a fastener as claimed in any one of claims 1 to 8, wherein the material property test component comprises a material property test sensor device and a material property data acquisition module; The material property test sensor device is connected to an end surface of the fastener to be tested; The material property data acquisition module is electrically connected to the material property test sensor device and is used to obtain test data of the fastener to be tested by the material property test sensor device.

10. The testing device according to claim 9, characterized in that: The material property testing sensor device is configured as an acoustic sensor.

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