A new type of elastic sheet strength testing device

Abstract

The application relates to the technical field of metal strength testing, and discloses a novel elastic metal sheet strength testing device which comprises a base, a vertical rod is fixed on the base, a liftable machine seat is fixed at the top end of the vertical rod, a motor is installed in the machine seat, a supporting plate is fixed on the vertical rod, the top surface of the supporting plate is fixed with a placing table, the placing table is hollow, a plurality of negative pressure suction ports are formed in the top surface of the placing table, a first mounting bracket is fixed on the output shaft of the motor, a second mounting bracket is fixed at the bottom end of the first mounting bracket, a polishing assembly, an adjusting assembly and a positioning assembly are arranged on the second mounting bracket, and a rotating assembly is arranged on the first mounting bracket. The novel elastic metal sheet strength testing device is provided with a plurality of groups of polishing plates with different mesh numbers, forms a friction structure with multiple friction coefficients, can adapt to the testing requirements of different types of components, makes up for the defect that the friction condition of the traditional equipment is single, and improves the fitting property and accuracy of the test data.

Description

Technical Field

[0001] This invention relates to the field of metal strength testing technology, and in particular to a novel device for testing the strength of elastic metal sheets. Background Technology

[0002] Elastic metal sealing sheets are core new metal-based composite materials in high-end equipment fields such as fluid sealing, high-pressure hydraulics, aero-engine pipelines, and deep-sea oil and gas valves. They are functional new materials that have been the focus of research and development in recent years. Their material formulation, rolling composite process, elastic deformation modulus, and surface wear-resistant coating are all different from traditional ordinary metal gaskets. The strength characteristics of the new material sealing components directly determine the operational safety of the equipment.

[0003] When testing the mechanical stress strength of novel elastic metal sealing materials, traditional testing methods generally employ rigid clamps to hold the sample at the testing station. The sample surface is continuously rubbed by a friction plate with a single coefficient of friction, and the mechanical strength and durability of the material are determined by the degree of surface wear. This testing mode is difficult to adapt to the current research and verification needs of various types of new metal sealing materials. Specifically, various novel elastic metal sealing materials differ in alloy base material ratio, surface wear-resistant coating, rolling thickness, and elastic modulus. The friction medium, mating contact surface hardness, and extrusion stress conditions they encounter under actual service conditions are also different. Traditional equipment has a fixed friction coefficient of friction plate that cannot be flexibly switched, and it cannot simulate various operating conditions of new materials, making it difficult to accurately reflect the strength characteristics of metal sealing sheets.

[0004] Therefore, a new type of elastic metal sheet strength testing device needs to be designed to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to overcome the problems of existing traditional seal wear resistance testing equipment being unable to adapt to various types of new elastic metal sealing materials, having limited friction simulation conditions, and insufficient reference value of mechanical wear test data. This invention provides a strength testing device adapted to new elastic metal sealing sheets, capable of conducting mechanical stress wear, fatigue deformation, and sealing durability tests on new metal sealing materials with different alloy substrates, different surface wear-resistant coatings, and different thicknesses under multiple friction coefficient conditions. This supports new material-related testing services such as formula comparison testing, batch performance testing of finished new materials, and simulation of new material operating conditions during the new material research and development process.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A novel elastic metal sheet strength testing device includes a base, a vertical rod fixed on the base, a liftable base fixed to the top of the vertical rod, a motor installed inside the base, a support plate fixed on the vertical rod, a placement platform fixed to the top surface of the support plate, the placement platform being hollow inside, and several negative pressure suction ports opened on the top surface of the placement platform. A first mounting bracket is fixed to the output shaft of the motor, a second mounting bracket is fixed to the bottom of the first mounting bracket, the second mounting bracket is provided with a grinding component, an adjustment component, and a positioning component, and the first mounting bracket is provided with a rotating component.

[0007] As a preferred embodiment of the present invention, the polishing assembly includes a turntable, which is fixedly connected to a second mounting bracket. The turntable has several mounting openings, and a sliding rod is slidably disposed in each mounting opening. A polishing plate is fixed at the bottom end of each sliding rod. The grit count of the polishing plates is different. A collar is fixed at the top end of each sliding rod. Each collar is connected to the turntable by a spring. Several guide plates are fixed on the bottom surface of the turntable. The guide plates are arranged in pairs and act on the polishing plates respectively.

[0008] As a preferred embodiment of the present invention, the two ends of the grinding plate are fitted with the guide plates on both sides.

[0009] As a preferred embodiment of the present invention, the adjustment assembly includes a rotating plate, which is located above the turntable and is coaxial with the turntable. A protrusion is fixed at the edge of the bottom surface of the rotating plate.

[0010] In a preferred embodiment of the present invention, the rotating assembly includes a rotating rod and a driving rod. The bottom end of the rotating rod is rotatably connected to the top surface of the turntable. The rotating rod passes through a rotating plate and is fixedly connected to the rotating plate. The bottom end of the driving rod has a slot. The driving rod passes through a second mounting bracket and is slidably connected to the second mounting bracket. A connecting block is fixed to the top end of the rotating rod. The connecting block is slidably disposed in the slot. The connecting block and the slot are connected by a spring. The cross-sections of the slot and the connecting block are both rectangular. A positioning block is fixed to the outer surface of the driving rod, and the positioning block is located above the second mounting bracket.

[0011] As a preferred embodiment of the present invention, the surface of the connecting block is in contact with the groove wall.

[0012] As a preferred embodiment of the present invention, the positioning component includes a positioning ring, which is connected to the second mounting bracket via two connecting rods. The positioning ring has a plurality of positioning holes, which are respectively positioned opposite to a plurality of grinding plates.

[0013] As a preferred embodiment of the present invention, a jet pipe is fixed on the vertical rod, and a plurality of jet nozzles are provided on the jet pipe, all of which are positioned facing the top surface of the placement platform. An air supply assembly is provided on the vertical rod, the air supply assembly including a top plate and a movable plate. The top plate is fixedly sleeved on the vertical rod, and the movable plate is slidably sleeved on the vertical rod. The movable plate is located below the top plate, and an air bladder is provided between the top plate and the movable plate. The air bladder is used to supply air to the jet pipe, and the movable plate is connected to the base through a pressure rod.

[0014] As a preferred embodiment of the present invention, a refrigeration compressor is installed on the base, and the gas discharged from the airbag enters the jet pipe after passing through the refrigeration compressor.

[0015] The present invention has the following beneficial effects: This invention is designed to address the strength testing requirements of novel elastic metal sealing materials and has the following advantages: Firstly, the turntable is equipped with multiple sets of grinding plates with different mesh sizes to form a multi-gradient strength testing structure, which can be matched with new metal sealing materials with different alloy substrates, wear-resistant coatings on the surface, and thickness specifications. It can fully simulate the diverse working conditions of the actual use of new materials, make up for the shortcomings of traditional equipment with only a single testing condition, and improve the fit between the performance test data of new materials and the real working conditions. Secondly, the device uses the linkage of adjustment components, rotation components and positioning components, which can be easily switched by manual operation to switch the grinding plate currently participating in the friction test and complete the switching and debugging of different working conditions. The locking structure of the positioning ring and positioning block can prevent the position from shifting during the durability test of new materials and improve the test stability. Third, the air supply function, combined with the refrigeration compressor, produces a low-temperature cooling airflow. This addresses the issue that the high surface temperature after friction testing of new metal materials can easily alter the surface mechanical properties of the materials. After the test is completed, the new material sample is rapidly cooled down, reducing the impact of high temperature on the test results. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a novel elastic metal sheet strength testing device proposed in this invention; Figure 2 for Figure 1 Enlarged view of the structure at point A; Figure 3 Schematic diagram of the grinding component, adjusting component, and rotating component. Figure 1 ; Figure 4 Schematic diagram of the grinding component, adjusting component, and rotating component. Figure 2 ; Figure 5 A cross-sectional view of the grinding assembly, the adjusting assembly, and the rotating assembly; Figure 6 This is a schematic diagram of the placement platform.

[0017] In the diagram: 1. Base; 2. Vertical rod; 3. Base; 4. Support plate; 41. Placement platform; 42. Negative pressure suction port; 51. First mounting bracket; 52. Second mounting bracket; 61. Turntable; 62. Mounting port; 63. Slide rod; 64. Collar; 65. Spring 1; 66. Grinding plate; 67. Guide plate; 71. Rotating plate; 72. Protrusion; 81. Rotating rod; 82. Drive rod; 83. Slot; 84. Spring 2; 85. Positioning block; 86. Connecting block; 91. Connecting rod; 92. Positioning ring; 93. Positioning port; 101. Jet pipe; 102. Jet nozzle; 103. Top plate; 104. Moving plate; 105. Airbag; 106. Pressure rod; 107. Refrigeration compressor. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] Example 1: This example discloses a novel elastic metal sheet strength testing device. The invention is designed to meet the strength testing needs of various new material elastic metal sealing sheets. All structural components are arranged to meet the needs of multi-condition simulation testing of new materials, rapid clamping of new materials, and rapid cooling testing of new materials under high-temperature friction. (Refer to...) Figure 1-6 It includes a base 1, a vertical rod 2 fixed on the base 1, a liftable base 3 fixed at the top of the vertical rod 2, a motor installed inside the base 3, a support plate 4 fixed on the vertical rod 2, a placement platform 41 fixed on the top surface of the support plate 4, the placement platform 41 is hollow inside, and several negative pressure suction ports 42 are opened on the top surface of the placement platform 41. The placement platform 41 is connected to the negative pressure machine.

[0020] When the negative pressure machine is running, it draws air out of the placement platform 41, causing several negative pressure suction ports 42 to suck up the workpiece under negative pressure, thus fixing the workpiece. The negative pressure machine is existing technology and is not shown in the figure, so it will not be described in detail here. The output shaft of the motor is fixed with a first mounting bracket 51, and the bottom end of the first mounting bracket 51 is fixed with a second mounting bracket 52. Both the first mounting bracket 51 and the second mounting bracket 52 are U-shaped structures.

[0021] The second mounting bracket 52 is equipped with a grinding assembly, which includes a turntable 61. The turntable 61 is fixedly connected to the second mounting bracket 52. The turntable 61 has several mounting holes 62, and a slide rod 63 is slidably installed in each mounting hole 62. A grinding plate 66 is fixed at the bottom of each slide rod 63. The grit count of the grinding plates 66 is different. A collar 64 is fixed at the top of each slide rod 63. Each collar 64 is connected to the turntable 61 by a spring 65. Several guide plates 67 are fixed on the bottom surface of the turntable 61. The guide plates 67 are arranged in pairs and act on the grinding plates 66 respectively. During the movement of the grinding plates 66, the guide plates 67 on both sides of the grinding plates 66 provide guidance for the grinding plates 66, ensuring the stability of the grinding plates 66 during the movement and preventing the grinding plates 66 from shaking.

[0022] The second mounting bracket 52 is equipped with an adjustment assembly, which includes a rotating plate 71. The rotating plate 71 is located above the turntable 61 and is coaxial with the turntable 61. A protrusion 72 is fixed to the edge of the bottom surface of the rotating plate 71. The surface of the protrusion 72 is a gently curved surface. When the protrusion 72 rotates to the position directly opposite the slide rod 63, the protrusion 72 will press against the slide rod 63, causing the slide rod 63 to move the grinding plate 66 downward. Therefore, the operator can control the downward movement of a certain grinding plate 66 by adjusting the position of the protrusion 72. For the grinding plate 66 directly opposite the protrusion 72... The distance between the grinding plate 66 and the turntable 61 is the largest. During the test, the operator places the metal sheet sample on the placement platform 41 and fixes the metal sheet sample using the negative pressure suction port 42. Then, the operator controls the base 3 to move down until the grinding plate 66 facing the protrusion 72 contacts the metal sheet sample. Then, the operator starts the motor. When the motor runs, it drives the first mounting bracket 51 and the second mounting bracket 52 to rotate, which in turn causes the turntable 61 and several grinding plates 66 to rotate at high speed. During the process, the grinding plate 66 facing the protrusion 72 grinds and tests the metal sheet sample, while the other grinding plates 66 do not contact the metal sheet sample.

[0023] A rotating assembly is provided on the first mounting bracket 51. The rotating assembly includes a rotating rod 81 and a driving rod 82. The bottom end of the rotating rod 81 is rotatably connected to the top surface of the turntable 61. The rotating rod 81 passes through the rotating plate 71 and is fixedly connected to the rotating plate 71. The bottom end of the driving rod 82 has a slot 83. The driving rod 82 passes through the second mounting bracket 52 and is slidably connected to the second mounting bracket 52. A connecting block 86 is fixed to the top end of the rotating rod 81. The connecting block 86 is slidably disposed in the slot 83. The connecting block 86 and the slot 83 are connected by a spring 84. The slot 83 and the connecting block 86 both have rectangular cross-sections, which allows the driving rod 82 to drive the rotating rod 81 to rotate through the connecting block 86. The surface of the connecting block 86 is in contact with the groove wall of the slot 83. A positioning block 85 is fixed to the outer surface of the driving rod 82 and is located above the second mounting bracket 52.

[0024] The second mounting bracket 52 is equipped with a positioning component, which includes a positioning ring 92. The positioning ring 92 is connected to the second mounting bracket 52 through two connecting rods 91. The positioning ring 92 has several positioning holes 93, which are respectively positioned opposite several grinding plates 66. In the initial state, the positioning block 85 is inserted into one of the positioning holes 93. The wear resistance testing device proposed in this invention can adjust the grinding plates 66 with different friction coefficients according to the usage of the metal sheet sample. The metal sheet sample is ground by grinding plates 66 with different friction coefficients, which is suitable for the differentiated strength test of different new elastic metal sealing materials and improves the accuracy of the test results. Specifically, when it is necessary to adjust the grinding plate 66, the operator first pulls up the drive rod 82 to move the drive rod 82 upward. When the drive rod 82 moves upward, it drives the positioning block 85 upward, so that the positioning block 85 disengages from the corresponding positioning hole 93.

[0025] The operator then rotates the drive rod 82. As the drive rod 82 rotates, it drives the rotating rod 81 to rotate via the connecting block 86. The rotating rod 81 then drives the rotating plate 71 to rotate, causing the protrusion 72 to rotate as well. When the protrusion 72 rotates to a position directly opposite a certain grinding plate 66, that grinding plate 66 will move downwards. For the other grinding plates 66, under the elastic force of spring 65, they will be positioned close to the turntable 61. After adjustment, the operator releases the drive rod 82, causing it to automatically reset under the action of spring 84. When the drive rod 82 resets, the positioning block 85 also resets and engages in the corresponding positioning slot 93. At this time, the positioning ring 92 locks the drive rod 82, preventing it from rotating. In summary, the operator can control the position of the grinding plate 66 by adjusting the position of the protrusion 72, achieving rapid adjustment of the grinding plate 66's position.

[0026] Example 2: Based on Example 1, this example discloses a novel elastic metal sheet strength testing device, such as... Figure 1 and Figure 2 As shown, a jet pipe 101 is fixed on the vertical rod 2. The jet pipe 101 has several jet nozzles 102, all of which are positioned facing the top surface of the placement platform 41. An air supply assembly is provided on the vertical rod 2. The air supply assembly includes a top plate 103 and a movable plate 104. The top plate 103 is fixedly sleeved on the vertical rod 2, and the movable plate 104 is slidably sleeved on the vertical rod 2. The movable plate 104 is located below the top plate 103. An airbag 105 is provided between the top plate 103 and the movable plate 104. The airbag 105 is used to supply air to the jet pipe 101. The movable plate 104 is connected to the base 3 by a pressure rod 106.

[0027] During the wear resistance test on the metal sheet sample, the base 3 descends. As the base 3 moves downward, it drives the moving plate 104 to move downward via the pressure rod 106. As the moving plate 104 moves downward, it moves away from the top plate 103. During this process, the moving plate 104 stretches the airbag 105. After the test is completed, the base 3 returns to its original position, and the moving plate 104 returns to its original position accordingly. When the moving plate 104 returns to its original position, it compresses the airbag 105. When the airbag 105 is compressed, the gas inside the airbag 105 enters the jet pipe 101 and is finally ejected through several jet nozzles 102. The airflow ejected from the several jet nozzles 102 is directed towards the top surface of the placement platform 41. The flow can cool down the metal sheet sample after testing. The surface temperature of the metal sheet sample is high after high-speed friction. The cooling treatment can quickly reduce the temperature of the metal sheet sample after testing, making it convenient for the staff to remove the metal sheet sample from the placement platform 41. Furthermore, a refrigeration compressor 107 is installed on the base 1. The gas discharged from the air bag 105 passes through the refrigeration compressor 107 and then enters the jet pipe 101. The refrigeration compressor 107 can cool the gas, causing several jet nozzles 102 to spray low-temperature gas, which can ensure the cooling effect on the metal sheet sample.

[0028] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A novel elastic metal sheet strength testing device, characterized in that, Includes a base (1), on which a vertical rod (2) is fixed, and at the top of the vertical rod (2) is a liftable base (3), in which a motor is installed, and on the vertical rod (2) is a support plate (4), and on the top surface of the support plate (4) is a placement platform (41), which is hollow inside, and on the top surface of the placement platform (41) are several negative pressure suction ports (42), the output shaft of the motor is fixed with a first mounting bracket (51), and at the bottom of the first mounting bracket (51) is a second mounting bracket (52), which is provided with a grinding component, an adjustment component and a positioning component, and on the first mounting bracket (51) is a rotating component.

2. The novel elastic metal sheet strength testing device according to claim 1, characterized in that, The polishing assembly includes a turntable (61), which is fixedly connected to a second mounting bracket (52). The turntable (61) has several mounting holes (62), and each mounting hole (62) has a sliding rod (63) slidably disposed therein. Each sliding rod (63) has a polishing plate (66) fixed at its bottom end. The number of grits of the polishing plates (66) are different. Each sliding rod (63) has a collar (64) fixed at its top end. Each collar (64) is connected to the turntable (61) by a spring (65). The bottom surface of the turntable (61) has several guide plates (67), which are arranged in pairs and act on the polishing plates (66) respectively.

3. The novel elastic metal sheet strength testing device according to claim 2, characterized in that, The two ends of the grinding plate (66) are attached to the guide plates (67) on both sides.

4. The novel elastic metal sheet strength testing device according to claim 2, characterized in that, The adjustment assembly includes a rotating plate (71), which is located above the turntable (61) and is coaxial with the turntable (61). A protrusion (72) is fixed at the edge of the bottom surface of the rotating plate (71).

5. The novel elastic metal sheet strength testing device according to claim 3, characterized in that, The rotating assembly includes a rotating rod (81) and a driving rod (82). The bottom end of the rotating rod (81) is rotatably connected to the top surface of the turntable (61). The rotating rod (81) passes through the rotating plate (71) and is fixedly connected to the rotating plate (71). The bottom end of the driving rod (82) is provided with a slot (83). The driving rod (82) passes through the second mounting bracket (52) and is slidably connected to the second mounting bracket (52). The top end of the rotating rod (81) is fixed with a connecting block (86). The connecting block (86) is slidably disposed in the slot (83). The connecting block (86) and the slot (83) are connected by a spring (84). The cross-sections of the slot (83) and the connecting block (86) are both rectangular. The outer surface of the driving rod (82) is fixed with a positioning block (85), and the positioning block (85) is located above the second mounting bracket (52).

6. The novel elastic metal sheet strength testing device according to claim 5, characterized in that, The surface of the connecting block (86) fits against the groove wall of the slot (83).

7. The novel elastic metal sheet strength testing device according to claim 5, characterized in that, The positioning component includes a positioning ring (92), which is connected to the second mounting bracket (52) via two connecting rods (91). The positioning ring (92) has several positioning holes (93), which are respectively positioned opposite to several grinding plates (66).

8. The novel elastic metal sheet strength testing device according to claim 1, characterized in that, A jet pipe (101) is fixed on the vertical rod (2). A plurality of jet ports (102) are provided on the jet pipe (101). The plurality of jet ports (102) are all positioned facing the top surface of the placement platform (41). An air supply assembly is provided on the vertical rod (2). The air supply assembly includes a top plate (103) and a movable plate (104). The top plate (103) is fixedly sleeved on the vertical rod (2). The movable plate (104) is slidably sleeved on the vertical rod (2). The movable plate (104) is located below the top plate (103). An airbag (105) is provided between the top plate (103) and the movable plate (104). The airbag (105) is used to supply air to the jet pipe (101). The movable plate (104) is connected to the base (3) through a pressure rod (106).

9. A novel elastic metal sheet strength testing device according to claim 8, characterized in that, A refrigeration compressor (107) is installed on the base (1). The gas discharged from the airbag (105) enters the jet pipe (101) after passing through the refrigeration compressor (107).

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