Friction coefficient testing device for screw fastener

Abstract

The invention relates to a friction coefficient testing device for a screw fastener, which effectively solves the problem of testing the friction condition between different materials in a small range and is suitable for the requirements of different working conditions. According to the technical scheme, the device comprises a detector used for processing test data; the bottom plate is arranged at the bottom of the detector; the adjusting assembly is arranged at the bottom of the right front side of the detector; the environment simulation assembly is arranged on the adjusting assembly; the material simulation assembly is connected with the adjusting assembly and is arranged in the environment simulation assembly; the driving assembly is connected with the top of the material simulation assembly and used for driving the material simulation assembly to rotate; the pressure detection device is arranged on the bottom plate and is in contact with the bottom of the material simulation assembly; and the explosion-proof bin is mounted on the detector and is used for supporting the driving assembly to work.

Description

Technical Field

[0001] The invention relates to the technical field of testing devices, and in particular to a friction coefficient testing device for a screw fastener. Background Art

[0002] Screw fasteners play an important role in the fields of mechanical manufacturing, construction engineering, electronic equipment, etc. In actual use, screw fasteners need to withstand various complex mechanical effects, including tension, shear and torque; the friction coefficient, as one of the important performance indicators of screw fasteners, directly affects the locking effect and stability of the fasteners; in many application scenarios, in order to ensure the long-term connection and anti-loosening ability of the fasteners, it is crucial to accurately evaluate their friction coefficient; however, the friction performance of screw fasteners is often affected by many factors such as ambient temperature, humidity and material properties.

[0003] There are various existing friction coefficient testing methods, but most of them are only tested under standard laboratory conditions and cannot take into account the complex environmental changes in actual working conditions. The data obtained by this test method may deviate greatly from the friction characteristics under actual application conditions, resulting in limited applicability and reliability of the test results. In addition, traditional friction coefficient testing devices usually only focus on the detection of torque force and ignore the collection of pressure data. Pressure data is crucial for detecting the slip and stress changes that may occur in threaded fasteners during the locking process. Relying solely on torque detection may result in incomplete friction coefficient detection data.

[0004] In order to better evaluate the friction performance of screw fasteners in actual environments, a multifunctional and comprehensive friction coefficient testing device is urgently needed to meet the changes in temperature, humidity and material contact interface; this device can simulate temperature and humidity under controlled conditions and obtain complete friction data through precise adjustment and driving devices.

[0005] In view of the above, the present application provides a friction coefficient testing device for screw fasteners to solve the above problems; the device is capable of testing the friction between different materials in a small range, and is suitable for the needs of different working conditions; at the same time, by adding a pressure detection device, the device can combine torque and pressure data to provide more accurate and comprehensive friction performance data, which will help improve the evaluation methods and standards for fastener quality. Summary of the invention

[0006] In view of the above situation, the present invention provides a friction coefficient testing device for screw fasteners, comprising: Detector, used to process test data; A bottom plate, arranged at the bottom of the detector; An adjustment component is provided at the bottom of the detector directly in front of the detector; An environmental simulation component is disposed on the regulating component; The material simulation component is connected with the adjustment component and is arranged inside the environment simulation component; A driving component connected to the top of the material simulation component and used for driving the material simulation component to rotate; A pressure detection device is disposed on the bottom plate and contacts the bottom of the material simulation component; The explosion-proof chamber is installed on the detector to support the operation of the drive components.

[0007] Preferably, the adjustment assembly includes a fixing plate, a connecting plate and a bending shaft; The fixing plate is fixedly connected to the bottom of the front side of the detector; The connecting plate is fixedly connected to the upper surface of the fixing plate on a side away from the detector; The bending axis is adjustably arranged on the connecting plate through bolts.

[0008] Preferably, the environmental simulation component includes a bearing unit, a temperature and humidity detector and a temperature and humidity adjustment unit; The bearing unit is mounted on a fixed plate; The temperature and humidity detector is installed on the carrying unit; The temperature and humidity adjustment unit is connected and arranged on the carrying unit.

[0009] Preferably, the bearing unit comprises a transparent frame and an adjustment shaft; The transparent frame is firmly mounted on the fixed plate; The adjustment shaft is arranged on the top of the transparent frame and is coaxially arranged with the transparent frame.

[0010] Preferably, the transparent frame comprises a round frame and a top cover; The top cover is detachably arranged on the round frame; The surface of the top cover is provided with an air outlet groove; A drainage outlet is arranged at the bottom of the circular frame.

[0011] Preferably, the temperature and humidity adjustment unit includes a hot air pipe, a cold air pipe and a mist pipe; The hot air pipe, cold air pipe and mist air pipe are all arranged in the explosion-proof chamber, one end of each of them passes through the inner cavity of the explosion-proof chamber to be connected with the carrying unit, and the other end of each of them also passes through the inner cavity of the explosion-proof chamber to be connected with the external conveying equipment.

[0012] Preferably, the material simulation assembly comprises a chassis, a matching plate, a material plate, a nut member and a threaded rod; The side surface of the chassis is fixedly connected to a side of the fixing plate away from the detector; The matching plate is detachably arranged in the chassis; The material disc is detachably arranged in the matching disc; The nut member is located on the upper side of the material disk and is arranged in the matching disk; The threaded rod passes through the matching disk, the material disk and the nut member in sequence.

[0013] Preferably, a positioning shaft is provided on the surface of the material disk, and a groove adapted to the positioning shaft is provided in the inner cavity of the matching disk.

[0014] Preferably, the driving assembly comprises a first adjusting column, a second adjusting column and a rotating cylinder; The first adjusting column is installed on the explosion-proof bin; The second adjustment column is adjustably arranged on the first adjustment column by means of a bolt; The rotary cylinder is arranged on a side of the second adjusting column away from the first adjusting column.

[0015] The above technical solution has the following beneficial effects: (1) The design of the device, through the coordination of various components, can simulate the actual use environment, adjust the temperature and humidity and simulate the materials, to ensure that the test results are closer to the actual use conditions; the adjustment components and environmental simulation components can be flexibly adjusted to provide appropriate temperature and humidity; the material simulation components can be replaced to adapt to different material contact conditions; the threaded rod can be rotated by the driving component, and the rotation torque and pressure detection devices are combined to improve the detection accuracy of friction data.

[0016] (2) The environmental simulation component can accurately adjust the temperature and humidity of the test environment, allowing the device to test the friction coefficient of fasteners in an environment similar to actual use conditions. This environmental simulation avoids data deviations caused by differences between laboratory conditions and actual application conditions, thereby improving the effectiveness of the test.

[0017] (3) The detachable design of the material simulation component enables it to accommodate different material discs and matching discs, allowing for flexible testing of friction between different materials. This flexibility allows the device to be applied to a variety of fasteners and usage scenarios, making it easy to replace and adjust different material contact surfaces, and facilitating comprehensive friction property research.

[0018] (4) The drive assembly drives the threaded rod to rotate through the rotating cylinder. Combined with the pressure detection device at the bottom, more comprehensive friction data can be obtained. The torque data measured by the rotating cylinder can reflect the friction characteristics between the thread and the material, while the downward pressure data captured by the pressure detection device makes up for the limitation of relying solely on torque detection, especially when the thread changes in tightness or slides slightly. The two types of data verify each other, making the detection results more accurate and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the regulating assembly of the present invention; Figure 3 It is a structural schematic diagram of the temperature and humidity adjustment unit of the present invention; Figure 4 It is a schematic diagram of the structure of the environmental simulation component of the present invention; Figure 5 It is a schematic diagram of the structure of the material simulation component of the present invention; Figure 6 It is a schematic diagram of the structure of the driving assembly of the present invention.

[0020] In the figure: 1. detector; 2. bottom plate; 3. adjustment component; 31. fixing plate; 32. connecting plate; 33. bending axis; 4. environmental simulation component; 41. bearing unit; 411. transparent frame; 4111. round frame; 4112. top cover; 4113. air outlet; 4114. drain outlet; 412. adjustment axis; 42. temperature and humidity detector; 43. temperature and humidity adjustment unit; 431. hot air pipe; 432. cold air pipe; 433. mist pipe; 5. material simulation component; 51. chassis; 52. matching plate; 53. material plate; 531. positioning axis; 54. nut; 55. threaded rod; 6. drive component; 61. first adjustment column; 62. second adjustment column; 63. rotating cylinder; 7. pressure detection device; 8. explosion-proof warehouse. DETAILED DESCRIPTION

[0021] 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 with 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.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0025] The present application proposes a friction coefficient testing device for screw fasteners, which is specifically as follows: For reference Figure 1 The present application mainly consists of a detector 1 for processing detection data, a base plate 2 arranged at the bottom of the detector 1, an adjustment component 3 arranged at the bottom of the front side of the detector 1, an environmental simulation component 4 arranged on the adjustment component 3, a material simulation component 5 connected to the adjustment component 3 and arranged inside the environmental simulation component 4, a driving component 6 connected to the top of the material simulation component 5 and used to drive the material simulation component 5 to rotate, a pressure detection device 7 arranged on the base plate 2 and in contact with the bottom of the material simulation component 5, and an explosion-proof chamber 8 installed on the detector 1 for supporting the driving component 6 to work; through the cooperation between multiple groups of structures, a tester simulating the real environment, materials and humidity is realized, so that the detection value is closer to the actual use situation, and the detection test data is closer to the real application situation.

[0026] For reference Figure 1 Detector 1 is consistent with the existing common detectors of this type, and is used to receive and process the data obtained during the detection. In order to better adapt the detector 1 to the use of this application, the traditional button position is changed, and the buttons are set on both sides. The middle part is a display screen for displaying data; the two ends are button operating tables.

[0027] For reference Figure 1A base plate 2 is provided at the bottom of the detector 1, and the base plate 2 is used to carry and install a structure for testing.

[0028] For reference Figure 1-2 An adjustment component 3 is provided at the bottom of the front side of the detector 1, and the environmental simulation component 4 and the material simulation component 5 are supported by the adjustment component 3; wherein the adjustment component 3 includes a fixed plate 31, a connecting plate 32 and a bending axis 33, the fixed plate 31 is fixedly connected to the bottom of the front side of the detector 1, the connecting plate 32 is fixedly connected to the upper surface of the fixed plate 31 away from the detector 1, and the bending axis 33 is adjustably arranged on the connecting plate 32 by bolts; according to the requirements of different situations, the connection height of the bending axis 33 is adjusted on the connecting plate 32.

[0029] For reference Figure 1 , Figure 3 and Figure 4 One end of the regulating component 3 is connected to the environmental simulation component 4, and the temperature and humidity are adjusted by the environmental simulation component 4 to fit the actual situation and obtain the required data; the environmental simulation component 4 includes a bearing unit 41, a temperature and humidity detector 42 and a temperature and humidity regulating unit 43; the bearing unit 41 is installed on the fixed plate 31, and can wrap the material simulation component 5, so as to adapt the further work content of the material simulation component 5 according to the situation in the bearing unit 41; the temperature and humidity detector 42 is installed on the bearing unit 41, and is used to observe the temperature changes in the bearing unit 41 in real time; the temperature and humidity regulating unit 43 is connected to the bearing unit 41, and can make adjustments according to the actual temperature and humidity changes, so as to adjust the bearing unit 41 to the required temperature and humidity to simulate the actual installation environment; thereby, the detected data can be closer to the data situation in the actual environment.

[0030] Further, the carrying unit 41 includes a transparent frame 411 and an adjustment shaft 412; The transparent frame 411 is firmly mounted on the fixed plate 31 to achieve a wrapping effect; the adjustment shaft 412 is disposed at the top of the transparent frame 411 and is coaxially arranged with the transparent frame 411. The transparent frame 411 and the adjustment shaft 412 are detachably connected. In subsequent use, different adjustment shafts 412 are changed to form a connection with the material simulation component 5 according to changes between parts; The transparent frame 411 includes a round frame 4111 and a top cover 4112; The top cover 4112 is detachably mounted on the circular frame 4111, and the detachable connection is intended to facilitate subsequent more detailed cleaning of the circular frame 4111, as well as inspection, maintenance and replacement of the material simulation component 5; an air outlet groove 4113 is provided on the surface of the top cover 4112, and the air outlet groove 4113 can maintain the circulation of the gas in the circular frame 4111 and the external gas, thereby reducing the occurrence of conditions such as excessive humidity under internal sealing; a drain port 4114 is provided at the bottom of the circular frame 4111, which can be used to discharge the integrated condensed water to the outside.

[0031] The temperature and humidity detector 42 is a relatively mature prior art, and this application does not elaborate on it in detail.

[0032] The temperature and humidity adjustment unit 43 includes a hot air pipe 431, a cold air pipe 432 and a mist pipe 433; The hot air pipe 431, the cold air pipe 432 and the mist pipe 433 are all arranged in the explosion-proof warehouse 8; one end of the three pipes passes through the inner cavity of the explosion-proof warehouse 8 to be connected with the carrying unit 41, and the other end also passes through the inner cavity of the explosion-proof warehouse 8 to be connected with the external conveying equipment; the hot air pipe 431, the cold air pipe 432 and the mist pipe 433 are respectively connected with the hot air, cold air and mist conveying equipment, and can selectively use the hot air or cold air to convey inward according to the room temperature, and the outside is controlled by the intelligent computer control to realize intelligent control; and after the temperature constant temperature control is stable, it is conveyed inward through the mist pipe 433 to adjust the humidity. When adjusting, the drain outlet 4114 can be connected to the drainage pipe to prompt the drainage pipe to discharge water in time when there is water in the round frame 4111.

[0033] For reference Figure 1 , Figure 3 and Figure 4 In one embodiment, two groups of environmental simulation components 4 are provided, which implement bifurcated flow control. The interfaces toward the two groups of environmental simulation components 4 are not increased, and only the diversion setting is implemented in the explosion-proof warehouse. Secondly, a flow valve is set at the diversion fork pipe to perform flow differentiation setting.

[0034] In view of the above, the environment simulation component 4 is used to realize a structure that can adjust the corresponding environment according to the setting environment of the screw fastener to simulate the actual environment.

[0035] For reference Figure 1 , Figure 2 and Figure 5 Under the condition that the environmental simulation component 4 realizes environmental simulation, a material simulation component 5 is further set up, and a small area simulation of materials is performed through the material simulation component 5; and the material simulation component 5 is located inside the environmental simulation component 4, so that the material simulation component 5 can perceive the simulation situation of the environmental simulation component 4, and enable the simulated material to operate in the simulated environment.

[0036] The material simulation component 5 includes a chassis 51, a matching disk 52, a material disk 53, a nut 54 and a threaded rod 55. The side of the chassis 51 is fixedly connected to the side of the fixed plate 31 away from the detector 1, and the chassis 51 realizes the support of the overall structure of the material simulation component 5; the matching disk 52 is detachably arranged in the chassis 51, and the matching disk 52 is adjusted according to the conditions of different simulated screw fasteners, so as to adjust the matching disk 52 with different sizes of center holes for use. At the same time, when adjusting the matching disk 52, the adjustment shaft 412 is also adapted and replaced; the material disk 53 is detachably arranged in the matching disk 52, and is set according to different environments and actual contact materials, and can be disassembled and replaced when different material contact detection is required; the nut 54 is located on the upper side of the material disk 53 and is arranged in the matching disk 52; the threaded rod 55 is sequentially penetrated through the matching disk 52, the material disk 53 and the nut 54; the threaded rod 55 rotates and rubs with the nut 54, and the friction data detection effect is achieved by detecting the torque force.

[0037] Furthermore, a locking shaft 531 is provided on the surface of the material disk 53, and a groove adapted to the locking shaft 531 is provided in the inner cavity of the matching disk 52. The locking shaft 531 is provided to firmly connect the material disk 53 in the matching disk 52, and the groove can reduce the occurrence of loosening and rotation, thereby reducing the statistics of friction data.

[0038] For reference Figure 1 and Figure 6 , and in the case of realizing the rotation of the threaded rod 55, a driving assembly 6 is provided, wherein the driving assembly 6 includes a first adjusting column 61, a second adjusting column 62 and a rotating cylinder 63; The first adjusting column 61 is installed on the explosion-proof chamber 8; the second adjusting column 62 is adjustably arranged on the first adjusting column 61 by bolts, and the height of the second adjusting column 62 on the first adjusting column 61 is adaptively adjusted according to the replacement of the material of the material simulation component 5; the rotating cylinder 63 is arranged on the side of the second adjusting column 62 away from the first adjusting column 61, and the rotating cylinder 63 is better connected to the threaded rod 55 through the adjusted height; the rotating cylinder 63 starts to work, prompting the threaded rod 55 to rotate, so that the friction index is obtained through the rotational torque.

[0039] For reference Figure 1 A pressure detection device 7 is provided on the bottom of the bottom plate 2 corresponding to the threaded rod 55. When the rotating cylinder 63 starts to work, the threaded rod 55 is prompted to move downward. During the downward movement, the pressure detection device 7 detects the downward pressure. The pressure detection device 7 at the bottom can capture the real pressure state of the fastener when it is tightened, avoiding the limitation of relying solely on torque data; especially when there are slight sliding or friction changes, the pressure data can supplement the torque changes and improve the detection accuracy.

[0040] Combining the rotation torque detection of the rotary cylinder 63 with the bottom pressure detection device can improve the detection effect and data reliability in the detection of the friction coefficient of the screw fastener.

[0041] The pressure detection device 7 is a relatively mature prior art in this field. The present application does not limit specific models and styles, and adjustments are made based on different application environments and detection accuracy requirements.

[0042] The above description is only for illustrating the present invention. It should be understood that the present invention is not limited to the above embodiments, and various variations that conform to the concept of the present invention are within the protection scope of the present invention.

Claims

1. A friction coefficient testing device for screw fasteners, characterized in that: include, A detector (1), for processing test data; A bottom plate (2) is arranged at the bottom of the detector (1); An adjustment component (3) is arranged at the bottom of the front side of the detector (1); An environmental simulation component (4) is disposed on the adjustment component (3); A material simulation component (5) is connected to the adjustment component (3) and is arranged inside the environment simulation component (4); A driving component (6) connected to the top of the material simulation component (5) and used to drive the material simulation component (5) to rotate; A pressure detection device (7) is disposed on the bottom plate (2) and contacts the bottom of the material simulation component (5); The explosion-proof chamber (8) is installed on the detector (1) and is used to support the operation of the driving component (6).

2. A friction coefficient testing device for screw fasteners according to claim 1, characterized in that: The adjustment assembly (3) comprises a fixing plate (31), a connecting plate (32) and a bending shaft (33); The fixing plate (31) is fixedly connected to the bottom of the front side of the detector (1); The connecting plate (32) is fixedly connected to the upper surface of the fixing plate (31) on a side away from the detector (1); The bending shaft (33) is adjustably arranged on the connecting plate (32) via bolts.

3. A friction coefficient testing device for screw fasteners according to claim 2, characterized in that: The environmental simulation component (4) comprises a carrying unit (41), a temperature and humidity detector (42) and a temperature and humidity adjustment unit (43); The bearing unit (41) is mounted on the fixing plate (31); The temperature and humidity detector (42) is mounted on the carrying unit (41); The temperature and humidity adjustment unit (43) is connected to and disposed on the carrying unit (41).

4. A friction coefficient testing device for screw fasteners according to claim 3, characterized in that: The bearing unit (41) comprises a transparent frame (411) and an adjustment shaft (412); The transparent frame (411) is stably mounted on the fixing plate (31); The adjustment shaft (412) is arranged on the top of the transparent frame (411) and is coaxially arranged with the transparent frame (411).

5. The friction coefficient testing device for screw fasteners according to claim 4, characterized in that: The transparent frame (411) comprises a round frame (4111) and a top cover (4112); The top cover (4112) is detachably mounted on the round frame (4111); The surface of the top cover (4112) is provided with an air outlet groove (4113); A drainage outlet (4114) is provided at the bottom of the circular frame (4111).

6. The friction coefficient testing device for screw fasteners according to claim 3, characterized in that: The temperature and humidity adjustment unit (43) comprises a hot air pipe (431), a cold air pipe (432) and a mist pipe (433); The hot air pipe (431), the cold air pipe (432) and the mist air pipe (433) are all arranged in the explosion-proof chamber (8), one end of each of them passes through the inner cavity of the explosion-proof chamber (8) to be connected to the bearing unit (41), and the other end of each of them also passes through the inner cavity of the explosion-proof chamber (8) to be connected to the external conveying equipment.

7. The friction coefficient testing device for screw fasteners according to claim 1, characterized in that: The material simulation component (5) comprises a base plate (51), a matching plate (52), a material plate (53), a nut member (54) and a threaded rod (55); The side surface of the chassis (51) is fixedly connected to a side of the fixing plate (31) away from the detector (1); The matching plate (52) is detachably arranged in the base plate (51); The material disk (53) is detachably arranged in the matching disk (52); The nut member (54) is located on the upper side of the material disk (53) and is arranged inside the matching disk (52); The threaded rod (55) is sequentially arranged to penetrate the matching disk (52), the material disk (53) and the nut member (54).

8. The friction coefficient testing device for screw fasteners according to claim 7, characterized in that: The surface of the material disk (53) is provided with a locking shaft (531), and the inner cavity of the matching disk (52) is provided with a groove adapted to fit the locking shaft (531).

9. The friction coefficient testing device for screw fasteners according to claim 1, characterized in that: The driving assembly (6) comprises a first adjusting column (61), a second adjusting column (62) and a rotating cylinder (63); The first adjustment column (61) is installed on the explosion-proof bin (8); The second adjustment column (62) is adjustably arranged on the first adjustment column (61) via a bolt; The rotary cylinder (63) is arranged on a side of the second adjustment column (62) away from the first adjustment column (61).

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