A device for testing the spring properties of a spring washer

Abstract

The application discloses a kind of spring washer elastic performance test methods, belong to spring washer elastic performance test technical field;Solve the problem of the elastic performance test method of existing spring washer, inefficient problem of cumbersome operation in test process.The test method includes: step 1, fixed base is fixed to test platform, then step stud is fixed to fixed base along vertical direction;Step 2, annular pressure sensor, force sleeve sleeve and conducting washer are sequentially sleeved on step stud and placed on the top surface of fixed base, and annular pressure sensor is connected with force value display;Step 3, spring washer is sleeved on step stud and above conducting washer, sets up tightening nut above conducting washer, and axial pre-tightening force is applied to spring washer by tightening nut.The test method of the application is simple, and multiple spring washers can be loaded and unloaded at a time under specified load, with high testing efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of spring washer elasticity testing devices, in particular to a spring washer elasticity performance testing device. BACKGROUND

[0002] According to the national standard, the spring washer needs to be tested for elasticity performance, and the test method requires that after applying a corresponding load to the spring washer of different specifications for 3 times, the free height is measured, and the free height after the test is required to be not less than 1.67 times S nominal.

[0003] The traditional test method is to use large equipment such as an electronic universal testing machine, place the spring washer in the middle of the pressure disc, start the electronic universal testing machine, and then use the height gauge to measure the free height of the spring washer after the electronic universal testing machine is started. The test process needs to rely on large equipment such as an electronic universal testing machine, and the space of the test site and the related hardware supporting requirements are high, and the test process needs to load the spring washer for 3 times, which is complicated and inefficient. SUMMARY

[0004] In view of the above analysis, the present application aims to provide a spring washer elasticity performance testing device to solve the problem that the existing spring washer elasticity performance testing device needs to rely on large equipment such as an electronic universal testing machine, and the space of the test site and the related hardware supporting requirements are high, and the test process is complicated and inefficient.

[0005] The purpose of the present application is mainly realized by the following technical solutions:

[0006] The present application provides a spring washer elasticity performance testing method, comprising the following steps:

[0007] Step 1, fixing the fixed base to the test platform, and then fixing the stepped stud to the fixed base along the vertical direction;

[0008] Step 2, sequentially sleeving the annular pressure sensor, the force sleeve and the conductive washer on the stepped stud and placing them on the top surface of the fixed base, and connecting the annular pressure sensor with the force value display;

[0009] Step 3, sleeving the spring washer on the stepped stud and above the conductive washer, and setting a tightening nut above the conductive washer, and applying an axial pre-tightening force to the spring washer through the tightening nut.

[0010] Further, in step 3, the number of spring washers is multiple, and the multiple spring washers are separated by washers.

[0011] Further, in step 3, the spring washer is one of a standard spring steel washer, a light spring washer, a heavy spring washer, a wave spring washer and a saddle spring washer.

[0012] Further, in step 3, before the axial pre-tightening force is applied to the spring washer, the annular pressure sensor is powered on with the force value display, and the annular pressure sensor is zeroed by the force value display.

[0013] Further, in step 3, the pre-tightening nut is tightened by a wrench, and when the force value display reaches the set load, the pre-tightening nut is stopped and then loosened, so that the spring washer is in a free state.

[0014] Further, in step 3, the loading and unloading processes are repeated 3 times respectively, then the pre-tightening nut is unscrewed, and the free height of the tested spring washer is measured by a height gauge, and the spring washer is qualified if the free height is greater than or equal to 1.67 times the S nominal, otherwise it is unqualified.

[0015] Further, in step 2, the stepped stud includes a first-order stud, a second-order stud, a third-order stud and a fixed segment from top to bottom.

[0016] Further, in step 2, the first-order stud, the second-order stud and the third-order stud have the same shape and height, and the outer diameters of the first-order stud, the second-order stud and the third-order stud increase in turn.

[0017] Further, in step 2, the first-order stud, the second-order stud and the third-order stud each include an external thread segment and a smooth cylindrical segment.

[0018] The external thread segment is used in cooperation with the pre-tightening nut, and the smooth cylindrical segment is used for placing the spring washer.

[0019] Further, in step 2, the first-order stud, the second-order stud and the third-order stud are respectively used for testing spring washers of different size specifications.

[0020] Compared with the prior art, the present application can achieve at least one of the following beneficial effects:

[0021] (1) The present application applies an axial pre-tightening force to the spring washer through the pre-tightening force loading assembly, and conducts the pre-tightening force to the pressure measuring and display assembly through the pre-tightening force conducting assembly, so as to continuously load and unload the spring washer three times. Compared with the existing test method, the test method of the present application is simple in process, easy to operate and high in test efficiency.

[0022] (2) The present application can apply axial pre-tightening force to the spring washer and transmit the axial pre-tightening force to the pressure measuring and pressure display assembly by setting the pre-tightening nut, the conducting washer and the force applying sleeve, and can accurately test the elastic performance of the spring washer.

[0023] (3) The present application can sense the axial pre-tightening force in the loading and unloading process by setting the annular platform on the top surface of the annular pressure sensor.

[0024] The above technical solutions can be combined with each other in the present application to realize more preferred combination solutions. Other features and advantages of the present application will be described in the subsequent specification, and some advantages will become apparent from the specification, or will be understood by implementing the present application. The purposes and other advantages of the present application can be realized and obtained through the contents specifically indicated in the specification, examples and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0025] The drawings are only for the purpose of illustrating specific embodiments and are not considered as limiting the present application, and the same reference signs represent the same components throughout the drawings.

[0026] Figure 1 It is a structural schematic diagram of the spring washer elastic performance testing device of the present application;

[0027] Figure 2 It is a structural schematic diagram of the spring washer elastic performance testing device of the present application; Figure 1 It is a sectional view along the A-A direction;

[0028] Figure 3 It is a structural schematic diagram of the fixed base;

[0029] Figure 4 It is a structural schematic diagram of the stepped stud;

[0030] Figure 5 It is a flowchart of the spring washer elastic performance testing method of the present application.

[0031] REFERENCE SIGNS:

[0032] 1 - fixed base; 2 - annular pressure sensor; 3 - stepped stud; 4 - force applying sleeve; 5 - pre-tightening nut; 6 - conducting washer; 7 - force value display; 8 - washer; 9 - spring washer; 10 - wire; 11 - first-order stud; 12 - second-order stud; 13 - third-order stud; 14 - fixed section. DETAILED DESCRIPTION

[0033] The preferred embodiments of the present application will be specifically described below in combination with the drawings, wherein the drawings constitute a part of the present application and are used to explain the principles of the present application together with the embodiments of the present application, but are not used to limit the scope of the present application.

[0034] The application provides a spring washer 9 elasticity performance test method, as shown in the figure, comprising the following steps: Figure 5

[0035] Step 1, fix the fixed base 1 to the test platform, then fix the stepped stud 3 to the fixed base 1 along the vertical direction;

[0036] Step 2, sequentially set the ring-shaped pressure sensor, force sleeve 4 and conducting washer 6 on the stepped stud 3 and on the top surface of the fixed base 1, and connect the ring-shaped pressure sensor with the force value display 7;

[0037] Step 3, set the spring washer 9 on the stepped stud 3 above the conducting washer 6, set the tightening nut above the conducting washer 6, and apply axial pre-tightening force to the spring washer 9 through the tightening nut.

[0038] Compared with the prior art, the spring washer 9 elasticity performance test method has simple test process, easy operation and high test efficiency.

[0039] In order to improve the test efficiency of the spring washer 9, in step 3, the number of spring washers 9 is multiple, and the multiple spring washers 9 are separated by the washer 8.

[0040] It should be noted that in step 3, the spring washer 9 is one of a standard spring steel washer, a light spring washer, a heavy spring washer, a wave spring washer and a saddle spring washer.

[0041] In step 3, before applying axial pre-tightening force to the spring washer 9, first connect the ring-shaped pressure sensor with the power supply of the force value display 7, and then set the ring-shaped pressure sensor to zero through the force value display 7.

[0042] In step 3, use a wrench to tighten the pre-tightening nut 5, stop tightening the pre-tightening nut 5 when the force value display 7 reaches the set load, then loosen the pre-tightening nut 5 to make the spring washer 9 in a free state, complete a single loading and unloading process, then repeat the loading and unloading process for 3 times respectively, then unscrew the pre-tightening nut 5, and measure the free height of the tested spring washer 9 with a height gauge, the spring washer 9 is qualified if it is greater than or equal to 1.67 times S nominal, and is unqualified if it is less than 1.67 times S nominal.

[0043] ​In step 2, the stepped stud 3 comprises a first step stud 11, a second step stud 12, a third step stud 13 and a fixed segment 14 from top to bottom; the first step stud 11, the second step stud 12 and the third step stud 13 have the same shape and height; the outer diameter of the first step stud 11, the second step stud 12 and the third step stud 13 increases in turn.

[0044] In step 2, the first step stud 11, the second step stud 12 and the third step stud 13 are respectively used for testing spring washers 9 of different size specifications.

[0045] The present application also provides a testing device for the elastic performance of the spring washer 9, which is used to realize the testing method described above, and comprises a fixed base 1, a pressure measuring and display assembly, a stepped stud 3, a pre-tightening force applying assembly, a pre-tightening force conducting assembly; the lower end of the stepped stud 3 is fixed on the fixed base 1, and the stepped stud 3 penetrates the pre-tightening force applying assembly, the spring washer 9, the pre-tightening force conducting assembly and the pressure measuring and display assembly from top to bottom; the pre-tightening force applying assembly is used to apply pre-tightening force to the spring washer 9, the pre-tightening force conducting assembly is used to conduct the pre-tightening force to the pressure measuring and display assembly, and the pressure measuring and display assembly is used to sense and display the pre-tightening force of the spring washer 9 during loading and unloading.

[0046] Specifically, as shown in Figure 1 and Figure 2 , the fixed base 1 of the present application is arranged on a test platform, the pressure measuring and display assembly of the present application is arranged on the fixed base 1, the stepped stud penetrates the pressure measuring and display assembly in the vertical direction, the pre-tightening force conducting assembly is arranged above the pressure measuring and display assembly, the spring washer 9 is arranged above the pre-tightening force conducting assembly, and the pre-tightening force applying assembly arranged above the spring washer 9 applies axial pre-tightening force to the spring washer 9.

[0047] Compared with the existing testing device, the present application does not need to rely on large equipment such as an electronic universal testing machine, and the related hardware matching requirements of the equipment are not high. In addition, the pre-tightening force applying assembly and the pre-tightening force conducting assembly are both sleeved on the stepped stud 3, which has a simple and stable structure, is reliable, and occupies a small space. It should be noted that when testing the elastic performance of the spring washer 9, first, the power supply of the pressure measuring and pressure display assembly is turned on, then the pre-tightening force applying assembly is tightened with a wrench, and the force value on the pressure measuring and pressure display assembly is observed at the same time. When the display reaches the set load, stop tightening the pre-tightening force applying assembly, then loosen the pre-tightening force applying assembly, unload the spring washer 9 to make it reach a free state, then tighten the pre-tightening force applying assembly again, so that the pre-tightening force reaches the set load, and then stop tightening the pre-tightening force applying assembly. The loading and unloading process of the spring washer 9 is repeated 3 times, the pre-tightening force applying assembly can be removed, the tested spring washer 9 is taken out and placed on the test platform, and the free height is measured with a height gauge. According to the elastic test method standard, if it is greater than or equal to 1.67 times the S nominal value, it is qualified, and if it is less than 1.67 times the S nominal value, it is unqualified. Thus, the elastic performance test of the spring washer 9 is completed.

[0048] In order to apply pre-tightening force to the spring washer 9 and conduct the pre-tightening force received by the spring washer 9 to the pressure measuring and pressure display assembly, the pre-tightening force conducting assembly of the present application includes a conducting washer 6 and a force applying sleeve 4, and the conducting washer 6 is arranged below the spring washer 9 and above the force applying sleeve 4. The pre-tightening force applying assembly includes a pre-tightening nut 5. The pre-tightening nut 5, the conducting washer 6 and the force applying sleeve 4 are all provided with a central hole, and the stepped stud penetrates the central holes of the pre-tightening nut 5, the conducting washer 6 and the force applying sleeve 4 in sequence.

[0049] Specifically, as shown in Figure 2 the pre-tightening force applying assembly of the present application includes a pre-tightening nut 5, and the pre-tightening force conducting assembly includes a conducting washer 6 and a force applying sleeve 4. The pre-tightening nut 5, the spring washer 9, the conducting washer 6 and the force applying sleeve 4 are sequentially sleeved on the stepped stud through the central holes. By turning the pre-tightening nut 5 with a wrench, the pre-tightening nut 5 applies axial pre-tightening force to the spring washer 9 below it. The spring washer 9 will be compressed after receiving the axial pre-tightening force and will transmit the pre-tightening force to the conducting washer 6. The conducting washer 6 conducts the pre-tightening force to the force applying sleeve 4 below it. Since the lower end surface of the force applying sleeve 4 is in contact with the pressure measuring and pressure display assembly, when the pressure measuring and pressure display assembly contacts and displays that the applied pre-tightening force reaches the set load, stop tightening the pre-tightening nut 5 and loosen the pre-tightening nut 5. Repeat the loading and unloading process for 3 times according to the above operation process.

[0050] It should be noted that the force applying sleeve 4 is a hollow rotary body, and the central hole inside the force applying sleeve 4 can ensure that the stepped stud 3 passes through the force applying sleeve 4 smoothly.

[0051] Compared with the prior art, by arranging the pre-tightening nut 5, the conducting washer 6 and the force applying sleeve 4, the axial pre-tightening force can be applied to the spring washer 9 and transmitted to the pressure measuring and display assembly, and the elastic performance of the spring washer 9 can be tested accurately.

[0052] It should be further noted that, since the pre-tightening nut 5, the spring washer 9, the conducting washer 6 and the force applying sleeve 4 are all arranged on the stepped stud arranged in the vertical direction, the structure of the testing device of the present application is relatively compact, and the space requirement for the test site is relatively low; in addition, the operation of the testing device is relatively simple, and compared with the existing large-scale equipment such as the electronic universal testing machine, the testing device occupies a larger site and has a complicated operation, and the testing efficiency is inevitably low.

[0053] In order to accurately measure the elastic performance of the spring washer 9, the pressure measuring and display assembly of the present application comprises a ring-shaped pressure sensor 2 and a force value display 7; the force value display 7 is connected to the ring-shaped pressure sensor 2 through a wire 10.

[0054] Specifically, the ring-shaped pressure sensor 2 of the present application can be sleeved on the stepped stud, and a ring-shaped platform is arranged on the top surface of the ring-shaped pressure sensor 2, and the outer diameter of the ring-shaped platform is equal to the outer diameter of the force applying sleeve 4. Compared with the prior art, the force value display 7 is connected to the ring-shaped pressure sensor 2, and the axial pre-tightening force transmitted by the force applying sleeve 4, i.e. the pre-tightening force borne by the spring washer 9, can be displayed in real time, and the composition of the pressure measuring and display assembly of the spring washer 9 of the present application is simple and the operation is convenient.

[0055] It should be noted that the force value of the ring-shaped pressure sensor 2 needs to be zeroed before the test starts.

[0056] In order to fix the ring-shaped pressure sensor 2 more firmly, the top of the fixing base 1 is provided with a concave ring-shaped step, and the ring-shaped step is arranged with the same center as the fixing base 1; the ring-shaped pressure sensor 2 is arranged on the ring-shaped step, and the outer diameter of the ring-shaped pressure sensor 2 matches the outer diameter of the ring-shaped step.

[0057] Specifically, as shown in Figure 3 the top surface of the fixing base 1 is provided with a concave ring-shaped step, and the outer diameter of the ring-shaped step matches the outer diameter of the ring-shaped pressure sensor 2, so that the ring-shaped pressure sensor 2 is stably placed on the top surface of the fixing base 1, i.e. the bottom end part of the ring-shaped pressure sensor 2 is embedded in the ring-shaped step, thereby increasing the firmness.

[0058] It should be noted that the height of the annular pressure sensor 2 is greater than the depth of the concave annular step, so as to avoid the contact between the force applying sleeve 4 and the fixed base 1.

[0059] It should be further noted that the upper end surface of the annular pressure sensor 2 is provided with a protruding annular platform, and the lower end surface of the force applying sleeve 4 is arranged on the protruding annular platform.

[0060] Specifically, as shown in Figure 1 and Figure 2 , the annular pressure sensor 2 of the present application is circular, the stepped stud 3 passes through the central hole in the middle of the circular force applying sleeve 4, the protruding annular platform on the upper end surface of the annular pressure sensor 2 is in contact with the lower end surface of the force applying sleeve 4, and both are arranged with the same center.

[0061] Compared with the prior art, the present application can sense the axial pre-tightening force during the loading and unloading process by arranging the annular platform on the top surface of the annular pressure sensor 2.

[0062] In order to realize the locking of the stepped stud 3 and the pre-tightening nut 5, the stepped stud of the present application comprises a first stepped stud 11 and a fixed segment 14, the first stepped stud 11 comprises an outer threaded segment and a smooth cylindrical segment from top to bottom, the outer threaded segment is used to cooperate with the pre-tightening nut 5 to exert the axial pre-tightening force on the spring washer 9 on the smooth cylindrical segment, and the fixed segment 14 is embedded in the conducting washer 6 and the force applying sleeve 4 and its bottom end is fixedly connected with the central hole of the fixed base.

[0063] Specifically, as shown in Figure 4 , the stepped stud of the present application comprises a first stepped stud 11 and a fixed segment 14 from top to bottom; wherein the outer threaded segment of the first stepped stud 11 is used to be threadedly connected with the pre-tightening nut 5, the spring washer 9 is sleeved on the smooth cylindrical segment, and the fixed segment 14 is embedded in the conducting washer 6 and the force applying sleeve 4. When it is needed to exert the pre-tightening force on the spring washer 9, the pre-tightening nut 5 is screwed by a wrench, so that the pre-tightening nut 5 is tightly screwed with the stepped stud 3, at this time, the pre-tightening nut 5 exerts the axial pre-tightening force on the spring washer 9, the conducting washer 6, the force applying sleeve 4 and the annular pressure sensor 2, and after the force value display 7 reaches the set load, the pre-tightening nut 5 is reversely screwed to unload the pre-tightening force load exerted on the spring washer 9.

[0064] It should be noted that the fixed base is provided with a threaded hole at the center, and the bottom end of the fixed segment 14 of the stepped stud 3 is threadedly connected with the fixed base.

[0065] In order to ensure the accuracy of the spring washer 9 elastic performance test and avoid the influence of the shaking of the fixed base 1 on the experimental data, the fixed base 1 of the present application is provided with a plurality of through holes, and the fixed base is fixed to the experimental table by using bolts passing through the through holes.

[0066] Specifically, as shown in Figure 3As shown, the fixed base 1 of the present application is provided with a plurality of through holes, for example, four through holes, namely a first through hole, a second through hole, a third through hole and a fourth through hole, which are uniformly distributed on the upper end surface of the fixed base 1 along the circumferential direction of the fixed base 1 and are located on the annular step which is upwardly convex relative to the annular step which is downwardly concave on the top surface of the fixed base 1.

[0067] It should be noted that, in order to improve the test efficiency of the test device on the elastic performance of the spring washer 9, the test device of the present application further comprises a washer 8, the number of the washer 8 is equal to the number of the spring washer 9; the number of the spring washer 9 between the pre-tightening nut 5 and the conductive washer 6 is multiple, and the multiple spring washers 9 are separated by the washer 8.

[0068] Compared with the prior art, the present application separates the adjacent spring washers 9 with the same specifications by the washer 8, which ensures that the spring washers 9 bear the axial pre-tightening force uniformly.

[0069] In order to further improve the applicability of the test device, the stepped stud 3 of the present application is a stepped pagoda structure as a whole, which further comprises a second-order stud 12 and a third-order stud 13, the second-order stud 12 and the third-order stud 13 are sequentially arranged between the first-order stud 11 and the fixed section 14, and the outer diameters of the first-order stud 11, the second-order stud 12 and the third-order stud 13 increase sequentially.

[0070] It should be noted that the structure and height of the second-order stud 12 and the third-order stud 13 are the same as those of the first-order stud 11, that is, they comprise an outer threaded section and a smooth cylindrical section, the outer threaded section is used for mutual cooperation with the pre-tightening nut 5 to exert an axial pre-tightening force on the multiple spring washers 9 which are sleeved on the smooth cylindrical section below.

[0071] Specifically, as shown in the figure, Figure 4 The outer threaded section of the first-order stud 11 is arranged above the smooth cylindrical section thereof, the smooth cylindrical section of the first-order stud 11 is connected with the outer threaded section of the second-order stud 12, the smooth cylindrical section of the second-order stud 12 is connected with the outer threaded section of the third-order stud 13, and the smooth cylindrical section of the third-order stud 13 is connected with the fixed section 14; it should be noted that the fixed section 14 is a stud with M48 external threads, which is used for cooperation with the fixed base 1 to keep the stepped stud 3 firmly and vertically fixed.

[0072] It is also emphasized that the first-order stud 11, the second-order stud 12 and the third-order stud 13 correspond to different sizes of the spring washer 9 due to their different outer diameters, that is, when the elastic properties of the spring washer 9 are tested by using the first-order stud 11, the second-order stud 12 and the third-order stud 13 respectively, the first-order stud 11, the second-order stud 12 and the third-order stud 13 need to match different sizes of the force applying sleeve 4, the conducting washer 6 and the pre-tightening nut 5 to load and unload the pre-tightening force of the spring washer 9 of different specifications, that is, the first-order stud 11, the second-order stud 12 and the third-order stud 13 cannot simultaneously test the elastic properties of the spring washer 9 of different specifications, but single test the elastic properties of the spring washer 9 of one order of stud and select the spring washer 9 of the same specification.

[0073] In addition, on the smooth cylindrical section of each step stud 3, multiple spring washers 9 separated by washers 8 and matching the size of the corresponding step stud can be placed at the same time, thereby achieving the loading and unloading of the pre-tightening force of multiple spring washers 9 of the same specification at one time.

[0074] It is also emphasized that the test device of the present application includes a series of 8 step studs 3, numbered T1-T8, the outer diameters of the first-order stud 11, the second-order stud 12, the third-order stud 13 and the fixed section 14 of T1 are 2mm, 2.5mm, 3mm, 48mm respectively; the outer diameters of the first-order stud 11, the second-order stud 12, the third-order stud 13 and the fixed section 14 of T2 are 4mm, 5mm, 6mm, 48mm respectively; the outer diameters of the first-order stud 11, the second-order stud 12, the third-order stud 13 and the fixed section 14 of T3 are 8mm, 10mm, 12mm, 48mm respectively; the outer diameters of the first-order stud 11, the second-order stud 12, the third-order stud 13 and the fixed section 14 of T4 are 14mm, 16mm, 18mm, 48mm respectively; the outer diameters of the first-order stud 11, the second-order stud 12, the third-order stud 13 and the fixed section 14 of T5 are 20mm, 22mm, 24mm, 48mm respectively; the outer diameters of the first-order stud 11, the second-order stud 12, the third-order stud 13 and the fixed section 14 of T6 are 27mm, 30mm, 33mm, 48mm respectively; the outer diameters of the first-order stud 11, the second-order stud 12, the third-order stud 13 and the fixed section 14 of T7 are 36mm, 39mm, 42mm, 48mm respectively; the outer diameters of the first-order stud 11 and the fixed section 14 of T8 are 45mm, 48mm respectively, except that the outer diameter of the fixed section 14 is 48mm, the heights of the other step studs are the same, that is, the heights of the first-order stud 11, the second-order stud 12 and the third-order stud 13 are the same.

[0075] The force applying sleeve 4 is divided into three series according to different heights, numbered S1-S3, which are the first force applying sleeve 4 (S1), the second force applying sleeve 4 (S2) and the third force applying sleeve 4 (S3), the heights of the first force applying sleeve 4 to the third force applying sleeve 4 increase successively, the height of the second force applying sleeve 4 is twice the height of the first force applying sleeve 4, and the height of the third force applying sleeve 4 is three times the height of the first force applying sleeve 4. When testing spring washers 9 of different size specifications, the first step stud 3 is used in cooperation with the third force applying sleeve 4, the second step stud 3 is used in cooperation with the second force applying sleeve 4, and the third step stud 3 is used in cooperation with the first force applying sleeve 4.

[0076] It should be noted that the spring washer 9 elastic performance testing device disclosed by the application is suitable for standard spring washers, light spring washers, heavy spring washers, wave spring washers and saddle spring washers, and can be used for elastic testing of spring washers 9 of specifications of 2mm-48mm, and is mainly used for loading and unloading of the spring washers 9.

[0077] It should be noted that the pre-tightening nut 5 of a corresponding size specification can be selected according to the size specification of the spring washer 9. In addition, the outer diameter of the conducting washer 6 is the same as the outer diameter of the force applying sleeve 4, and the inner diameter of the conducting washer 6 is 2mm-48mm according to different specifications of the spring washer 9.

[0078] The application ingeniously uses the annular pressure sensor 2, applies pre-tightening force through the cooperation of the pre-tightening nut 5 and the step stud 3, can easily complete continuous three times of loading and unloading of the fixed load of the spring washer 9, does not rely on large equipment, has low requirements for related hardware of the equipment, can perform loading and unloading of a specified load on multiple spring washers 9 at a time, has simple structure, is stable and reliable, is easy to operate, has low cost, is high in efficiency, and has wide application range.

[0079] Embodiment 1

[0080] In this embodiment, the spring washers 9 to be subjected to elastic performance testing are standard spring steel washers 8 (which can also be light spring washers, heavy spring washers, wave spring washers or saddle spring washers), the number is 5, the specification is 5mm (spring washers 9 of specifications of 2mm-48mm can be used), the pre-tightening nut 5 of M5 is selected according to the specification of the spring washer 9, the conducting washer 6 with an inner diameter equal to 5mm, the step stud 3 and the force applying sleeve 4 are selected.

[0081] In implementation, first, the fixed base 1 is fixed on the test bench by bolts, the step stud 3 is stably and vertically fixed with the fixed base 1 through threads, the annular pressure sensor 2 and the force value display 7 are removed, the annular pressure sensor 2 is sleeved over the step stud 3 and placed in the annular groove on the upper end surface of the fixed base 1, then the force applying sleeve 4 is sleeved over the step stud 3 and placed on the upper end convex ring of the annular pressure sensor 2, after that, the conducting washer 6 is sleeved over the step stud 3 and placed on the force applying sleeve 4, next, the five washers 8 and the five spring washers 9 are sleeved over the step stud 3 and placed on the conducting washer 6 at intervals, then the M5 pre-tightening nut 5 is screwed on the step stud 3, the power is turned on, the pressure sensor is zeroed through the force value display 7, the pre-tightening nut 5 is tightened by a wrench, and the force value display 7 is observed at the same time, when the force value display 7 displays that the force value reaches 5050N, the tightening of the pre-tightening nut 5 is stopped, then the pre-tightening nut 5 is loosened, the spring washers 9 are unloaded to a free state, and then the pre-tightening nut 5 is tightened again, so that the pre-tightening force reaches 5050N, the tightening of the pre-tightening nut 5 is stopped again, the loading and unloading process is repeated for three times, the pre-tightening nut 5 can be unscrewed, the spring washers 9 after the test are removed and placed on a platform, and the free height of the spring washers 9 is measured by a height gauge, according to the elastic test method standard, if the free height is greater than or equal to 1.67 times of S nominal, the spring washers 9 are qualified, and if the free height is less than 1.67 times of S nominal, the spring washers 9 are unqualified, thus the elastic test of the five spring washers 9 is completed.

[0082] In conclusion, the test device for the elastic performance of the spring washers 9 solves the problems that the existing test device for the elastic performance of the spring washers 9 needs to rely on large equipment such as an electronic universal testing machine, requires high space of a test site and related hardware matching, and has a complicated test process and low efficiency, the test device does not need to rely on large equipment, does not require high related hardware matching, can load and unload a plurality of (3-5) spring washers 9 at a time, can realize elastic tests of spring washers 9 of different specifications by matching the pre-tightening nut 5 and the conducting washer 6 of different sizes with the single step stud 3, has simple structure, is stable and reliable, is easy to operate, is low in cost, is high in efficiency, has wide application range, and is suitable for elastic tests of spring washers 9 of different specifications, such as standard spring washers, light spring washers, heavy spring washers, wave spring washers and saddle spring washers.

[0083] The above merely describes the preferred embodiments of the present application, but the protection scope of the present application is not limited to this, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A method of testing the spring washer properties of a spring washer, characterized by, The application discloses a testing device for spring washer elastic performance. The testing device comprises a fixed base, a pressure measuring and display assembly, a stepped stud, a pre-tightening force applying assembly and a pre-tightening force conducting assembly. The lower end of the stepped stud is fixed to the fixed base, and the stepped stud penetrates the pre-tightening force applying assembly, the spring washer, the pre-tightening force conducting assembly and the pressure measuring and display assembly from top to bottom. The pre-tightening force applying assembly is used for applying pre-tightening force to the spring washer, the pre-tightening force conducting assembly is used for conducting pre-tightening force, and the pressure measuring and display assembly is used for measuring and displaying the pre-tightening force of the spring washer during loading and unloading. The pre-tightening force conducting assembly comprises a conducting washer and a force applying sleeve, the conducting washer is arranged below the spring washer and above the force applying sleeve. The pre-tightening force applying assembly comprises a pre-tightening nut, the pre-tightening nut, the conducting washer and the force applying sleeve are all provided with central holes, and the stepped stud penetrates the central holes of the pre-tightening nut, the conducting washer and the force applying sleeve in sequence. The pressure measuring and display assembly comprises a ring-shaped pressure sensor and a force value display, and the force value display is connected with the ring-shaped pressure sensor through a wire. The stepped stud comprises a first-order stud and a fixed segment, and the first-order stud comprises an outer thread segment and a smooth cylindrical segment from top to bottom. The outer thread segment is used for cooperating with the pre-tightening nut to apply axial pre-tightening force to the spring washer on the smooth cylindrical segment, and the fixed segment is embedded on the conducting washer and the force applying sleeve and is fixedly connected with the central hole of the fixed base at the bottom end. The stepped stud is in a stepped pagoda structure, and the stepped stud further comprises a second-order stud and a third-order stud, the second-order stud and the third-order stud are arranged between the first-order stud and the fixed segment in sequence, and the outer diameters of the first-order stud, the second-order stud and the third-order stud increase in sequence. The first-order stud, the second-order stud and the third-order stud are respectively used for testing spring washers of different sizes. The second-order stud and the third-order stud have the same structure and height as the first-order stud. The testing method comprises the following steps: Step 1, fixing the fixed base to a test platform, and then fixing the stepped stud to the fixed base along the vertical direction; Step 2, sequentially sleeving the ring-shaped pressure sensor, the force applying sleeve and the conducting washer on the stepped stud and placing them on the top surface of the fixed base, and connecting the ring-shaped pressure sensor with the force value display; Step 3, sleeving the spring washer on the stepped stud and above the conducting washer, arranging a tightening nut above the conducting washer, applying axial pre-tightening force to the spring washer by tightening the nut through a wrench, stopping the tightening of the pre-tightening nut when the force value display reaches the set load, then loosening the pre-tightening nut to make the spring washer in a free state, and completing a single loading and unloading process.

2. The method of claim 1, wherein, In the step 3, the number of the spring washers is multiple, and the multiple spring washers are separated by washers.

3. The method of claim 2, wherein the spring washer is a Belleville spring washer. In the step 3, before the axial pre-tightening force is applied to the spring washer, the annular pressure sensor is powered on with the force value display, and the annular pressure sensor is zeroed by the force value display.

4. The method of testing the spring washer elastic properties according to claim 3, characterized in that, In the step 3, the loading and unloading processes are repeated for 3 times respectively, then the pre-tightening nut is unscrewed, and the free height of the tested spring washer is measured by the height gauge; if the spring washer is greater than or equal to 1.67 times of S nominal, it is qualified; if the spring washer is less than 1.67 times of S nominal, it is unqualified.

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