CN116499669A - Titanium alloy double-spiral spring fatigue testing device - Google Patents
Titanium alloy double-spiral spring fatigue testing device Download PDFInfo
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- CN116499669A CN116499669A CN202310744295.2A CN202310744295A CN116499669A CN 116499669 A CN116499669 A CN 116499669A CN 202310744295 A CN202310744295 A CN 202310744295A CN 116499669 A CN116499669 A CN 116499669A
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- 238000009661 fatigue test Methods 0.000 title claims abstract description 37
- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 21
- 238000012360 testing method Methods 0.000 claims abstract description 42
- 238000000034 method Methods 0.000 claims abstract description 27
- 230000008569 process Effects 0.000 claims abstract description 21
- 230000000694 effects Effects 0.000 claims description 20
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 230000000452 restraining effect Effects 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 5
- 229920002554 vinyl polymer Polymers 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 4
- 230000005484 gravity Effects 0.000 claims description 4
- 230000001680 brushing effect Effects 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 239000003973 paint Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 230000005389 magnetism Effects 0.000 description 11
- 238000005452 bending Methods 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000000670 limiting effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
- G01M5/005—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress by means of external apparatus, e.g. test benches or portable test systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a titanium alloy double-spiral spring fatigue testing device applied to the field of spring testing, which comprises a test bench base, wherein a hydraulic device is fixed at the top end of a supporting frame, an output end of the hydraulic device is connected with a telescopic slide rod, the top end of the test bench base and the tail end of the telescopic slide rod are both connected with constraint clamps, the surfaces of the constraint clamps, which are close to each other, are connected with elastic inhaul cables, the surfaces of the elastic inhaul cables are connected with constraint cross plates in series in a sliding manner, constraint screw holes are formed in the surfaces of the constraint clamps, constraint screw rods are connected with internal threads of the constraint screw holes, a corresponding number of constraint cross plates are selected, the selected constraint cross plates are sequentially and transversely inserted into gaps of the end parts of a spring, then the screw holes are aligned with the constraint screw holes of the surfaces of the constraint clamps, and the constraint screw rods are inserted into the constraint screw holes closest to the outer surfaces of the spring, so that multi-end-face constraint connection of the end parts of the spring can be realized, and the phenomenon that the end parts of the spring easily occur in the stretching process in the prior art is effectively improved.
Description
Technical Field
The application relates to the field of spring testing, in particular to a titanium alloy double-spiral spring fatigue testing device.
Background
The double-spiral spring with titanium alloy is a spiral spring with a double-spiral structure, which is made of titanium alloy, and compared with a single spiral spring, the double-spiral spring has better service performance, and in order to ensure the normal use of the spiral spring, fatigue test needs to be carried out before the spring leaves a factory for sale.
The existing spring fatigue testing device is characterized in that a hook or clamping operation is generally used for restraining and fixing the end part of a spring during testing, and then corresponding tensile fatigue detection is carried out, but in a currently produced spring product, the number and the types of springs with hook connecting pieces connected to the tail end are limited, and when the tensile fatigue test is carried out through clamping and taking the restrained springs, the end part of the springs is easy to separate from a clamp during stretching due to the fact that the end part of the springs is smooth, fatigue test interruption is forced, and accuracy and reliability of a fatigue test result are affected.
Therefore, the fatigue testing device for the titanium alloy double-spiral spring is provided, the restraint stability of the spring end part and the clamp in the reciprocating stretching process is improved by improving the clamping mode of the spring end part during the fatigue test, and further the continuous performance of the fatigue test and the accuracy of the fatigue test result are ensured.
Disclosure of Invention
This application aim at carries out improvement to spring fatigue testing arrangement and handles, compare prior art and provide a titanium alloy double helix spring fatigue testing arrangement, including the testboard base, the support frame is installed at the top of testboard base, the top of support frame is fixed with the hydraulic press, the output of hydraulic press is connected with flexible slide bar, the top of testboard base and the tail end of flexible slide bar all are connected with restraint anchor clamps, restraint anchor clamps are close to each other's surface connection has elastic cable, the surface slip of elastic cable has concatenated the constraint diaphragm, restraint anchor clamps are close to each other's surface is equipped with the constraint screw that is located elastic cable one side, restraint screw's internal thread connection has the constraint screw, restraint diaphragm's inside is equipped with the screw hole with constraint screw one-to-one, select corresponding quantity constraint diaphragm, transversely inject the clearance of spring tip in proper order with the constraint screw hole with the screw hole alignment restraint anchor clamps surface later, inject the constraint screw into the constraint screw hole that is closest to the spring surface, can realize the multiport face constraint connection to the spring tip, afterwards adjust the tensile effort of hydraulic press, accomplish the fatigue testing operation of double helix spring in the reciprocating motion process, compare in prior art and easy use has the improvement effect that the spring takes place in the process of the easy-to cause of the tensile spring.
Further, the length of the constraint diaphragm is greater than the diameters of the two groups of constraint clamps, and the constraint diaphragm is made of elastic metal materials, so that the end part of the constraint diaphragm can be bent to adapt to corresponding constraint limiting operation when corresponding constraint processing is carried out on the test spring with the larger diameter.
Further, the inside hollow rubber sleeve has been cup jointed on the surface of restraint diaphragm, and the surface symmetry of rubber sleeve is equipped with gas vent and air inlet, and the inside of gas vent and air inlet installs the check valve that the direction of ventilation is opposite respectively, and the rubber sleeve can strengthen the friction contact stability of restraint diaphragm and test spring tip to when the reciprocal extrusion motion of hydraulic press, outwards exhaust and then form the forced air cooling effect to test spring's surface through the gas vent, reduce test spring because of the heat that the friction produced to fatigue test's interference.
Further, the exhaust port is located at the outer side of the air inlet, the rubber sleeve is made of an elastic vinyl material, the vinyl material has a restoration characteristic, and then the rubber sleeve can continuously maintain air inlet and air outlet operation, so that air cooling and heat dissipation in the testing process are guaranteed.
Further, the size of the tail end constraint fixture of the telescopic slide bar is smaller than that of the constraint fixture at the top of the base of the test bench, and the two groups of constraint fixtures are located on the same vertical axis, so that the influence on reciprocating stretching and dropping operation in the test process is avoided.
Further, the depth value of the constraint screw hole is not smaller than the length value of the constraint screw rod, the inner wall and the outer wall of the constraint screw rod are connected with threaded rubber sleeves, connection stability between the constraint screw rod and the constraint screw hole is enhanced, corresponding damping effect is achieved, and damage of vibration action to connection action of the constraint screw rod and the constraint screw hole is prevented.
Further, the operation method of the titanium alloy double-coil spring fatigue testing device comprises the following testing steps:
s1, before a double-coil spring test is carried out, brushing a layer of thermochromic paint on the surface of the double-coil spring to be tested;
s2, transversely inserting the constraint transverse plates into gaps at the end parts of the double-coil springs, and aligning the end parts of the multiple groups of constraint transverse plates;
s3, inserting the constraint screw into a constraint screw hole closest to the double-helical spring until a screw cap at the top end of the constraint screw tightly extrudes the constraint transverse plate at the outermost layer;
s4, starting a hydraulic device to perform reciprocating stretching fatigue detection, in the upward moving process, inflating the rubber sleeve through an air inlet, and in the downward pressing process, performing air cooling and heat dissipation on the surface of the double-spiral spring restrained and fixed through the restraining clamp through an air outlet by air in the rubber sleeve.
Optionally, the middle part of restraint diaphragm is two sets of inside hollow concatenation pieces constitution, the internally mounted of concatenation piece has flexible loop bar, the tip of restraint diaphragm is equipped with concatenates the hole, and the inside of concatenating the hole is equipped with the arc breach that length is less than concatenate hole diameter, the size of arc breach is less than the diameter of elasticity cable, extrude the elasticity cable, can take out the restraint diaphragm from the inside of concatenating the hole, later split the concatenation piece, enclose it and put the outside at the test spring after the spacing processing of restraint behind the flexible loop bar of inside, play and prevent buckling protection, prevent fatigue test in-process test spring to take place middle part buckling.
Optionally, flexible loop bar is including movable rod and storage pole, and movable rod swing joint is in the inside of storage pole, and the surface of movable rod is equipped with the magnetism and inhales the layer, and the inner wall of storage pole is arranged and is inhaled the layer looks mutual attraction's magnetism and inhale the circle layer, and magnetism is inhaled the effect and can be guaranteed flexible loop bar and is kept stable tensile state after tensile between movable rod and the storage pole, and then guarantees that the constraint diaphragm has sufficient length and is used for enclosing the longer test spring of length.
Optionally, the end connection of constraint diaphragm has the magnetism to inhale the piece, and the surface coating of constraint anchor clamps is equipped with and inhales the piece looks attraction magnetism and inhale the coating, and magnetism between piece and the magnetism inhale the effect and be constraint diaphragm self gravity 3-5 times, magnetism inhale the effect and can guarantee the stable connection effect between constraint diaphragm and the constraint anchor clamps, ensure the constraint diaphragm and provide the stability of standing that encloses the protection in-process of buckling for test spring.
Compared with the prior art, the advantage of this application lies in:
(1) Through the cooperation of constraint diaphragm, constraint screw and constraint screw, before carrying out fatigue test, select corresponding quantity constraint diaphragm, transversely inject the clearance of spring tip in proper order with selected constraint diaphragm, later with the constraint screw of screw hole alignment constraint anchor clamps surface, inject the constraint screw in the constraint screw that is closest to the spring surface, can realize the multiport face constraint connection to the spring tip, effectively improve the slip phenomenon that the spring tip easily takes place in the tensile in-process among the prior art.
(2) The rubber sleeve on the surface of the constraint diaphragm can strengthen the friction contact stability between the constraint diaphragm and the end part of the test spring, and when the hydraulic device reciprocates and extrudes, the air is exhausted outwards through the exhaust port so as to form an air cooling effect on the surface of the test spring, and the interference of heat generated by friction of the test spring on the fatigue test is reduced.
(3) The elastic inhaul cable is extruded, the constraint transverse plate can be taken out from the inside of the serial connection hole, then the splicing block is split, the inside telescopic loop rod is stretched and then is enclosed and placed on the outer side of the test spring after constraint limiting treatment, bending prevention protection is achieved, and middle bending of the test spring in the fatigue test process is prevented.
(4) The magnetic attraction can ensure that the telescopic loop bar is kept in a stable stretching state between the movable bar and the storage bar after stretching, so that the constraint transverse plate is ensured to have enough length for enclosing a test spring with longer length.
Drawings
FIG. 1 is a schematic view of the use state of the present application;
FIG. 2 is a schematic overall exterior mounting view of the present application;
FIG. 3 is a prior art schematic diagram of the present application;
FIG. 4 is a schematic representation of the installation of the restraint fixtures of the present application;
FIG. 5 is a schematic view of the constraint fixture of the present application after installation;
FIG. 6 is a schematic view of the rubber boot and restraint cross-plate installation of the present application;
FIG. 7 is a schematic view of the rubber sleeve, air inlet and air outlet of the present application in operation;
FIG. 8 is a schematic view of the restraint cross-plate, splice block and telescoping loop bar installation of the present application;
FIG. 9 is a schematic view of the state of the constraining cross plate after stretching the telescopic loop bar of the present application;
FIG. 10 is a schematic view of the stretched tie wrap of the present application outboard of the test double coil spring.
The reference numerals in the figures illustrate:
1. a test bench base; 2. a support frame; 3. a hydraulic device; 4. a restraint clamp; 41. restraining the screw hole; 42. an elastic inhaul cable; 43. restraining the cross plate; 44. restraining the screw; 431. splicing blocks; 432. a telescopic loop bar; 433. a series connection hole; 5. a rubber sleeve; 51. an exhaust port; 52. an air inlet.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments in the present application are all within the scope of protection of the present application.
Example 1:
the invention provides a titanium alloy double-helical spring fatigue testing device, referring to fig. 1-5, which comprises a test bench base 1, wherein a support frame 2 is arranged at the top of the test bench base 1, a hydraulic device 3 is fixed at the top end of the support frame 2, an output end of the hydraulic device 3 is connected with a telescopic slide rod, constraint clamps 4 are connected to the top end of the test bench base 1 and the tail end of the telescopic slide rod, elastic inhaul cables 42 are connected to surfaces of the constraint clamps 4, constraint transverse plates 43 are connected to surfaces of the elastic inhaul cables 42 in a sliding and serial mode, constraint screw holes 41 are formed in surfaces of the constraint clamps 4, which are close to each other, on one side of the elastic inhaul cables 42, constraint screws 44 are connected to internal threads of the constraint screw holes 41, and threaded holes corresponding to the constraint screw holes 41 are formed in the constraint transverse plates 43.
Specifically, when the fatigue test is performed on the double-coil spring, a corresponding number of constraint transverse plates 43 are selected according to the length of the spring and the spring elastic force value, the selected constraint transverse plates 43 are sequentially transversely inserted into gaps at the end parts of the spring, then threaded holes are aligned with constraint screw holes 41 at the surface of the constraint clamp 4, constraint screws 44 are inserted into the constraint screw holes 41 closest to the outer surface of the spring, multi-end-face constraint connection of the end parts of the spring can be realized, and compared with the fact that the clamping operation commonly used in the prior art causes slipping phenomena of the end parts of the spring, which easily occur in the stretching process, to have good improvement effects.
The length of the restraint cross plate 43 is larger than the diameters of the two groups of restraint jigs 4, and the restraint cross plate 43 is made of a metal material having elasticity.
Specifically, the length of constraint diaphragm 43 is greater than constraint fixture 4, and then when the diameter of the double-helical spring that awaits measuring is greater than constraint fixture 4, still can transversely insert in the tip clearance of spring and turn over according to corresponding length demand, laminate constraint diaphragm 43's tip to the constraint fixture 4 surface that the side surface still is equipped with constraint screw 41 to play corresponding constraint spacing effect.
Referring to fig. 6-7, the surface of the constraint diaphragm 43 is sleeved with a hollow rubber sleeve 5, the surface of the rubber sleeve 5 is symmetrically provided with an air outlet 51 and an air inlet 52, and the inside of the air outlet 51 and the inside of the air inlet 52 are respectively provided with a one-way valve with opposite ventilation directions.
Specifically, the use of the rubber sleeve 5 can strengthen the friction contact between the constraint diaphragm 43 and the surface of the double-helical spring, so that the constraint effect of the constraint diaphragm 43 on the end part of the spring is more stable, the anti-drop effect is enhanced, and meanwhile, in the compression extrusion process of the spring, the air in the rubber sleeve 5 is extruded to be discharged outwards through the air outlet 51, so that the air cooling heat dissipation effect is generated on the surface of the double-helical spring, which generates heat due to extrusion friction.
The exhaust port 51 is located outside the air inlet 52, and the rubber sleeve 5 is made of an elastic vinyl material.
Specifically, the rubber sleeve 5 made of the vinyl material has a restoration property, so that after the extrusion force acting on the surface of the rubber sleeve is eliminated, the rubber sleeve 5 is restored, and air is sucked into the interior through the air inlet 52 in the restoration process, so that an air source is provided for subsequent air discharge.
The depth value of the constraint screw hole 41 is not smaller than the length value of the constraint screw 44, and the inner wall and the outer wall of the constraint screw 44 are connected with threaded rubber sleeves.
Specifically, the constraint screw hole 41 may be used to sufficiently tighten the constraint screw 44, so that the constraint screw 44 may tightly screw the constraint diaphragm 43 at the outermost layer to the constraint screw hole 41, so as to ensure the constraint limiting effect of the constraint diaphragm 43 on the end of the double coil spring.
A fatigue testing device for a titanium alloy double-helical spring, the operation method of the testing device comprises the following testing steps:
s1, before a double-coil spring test is carried out, brushing a layer of thermochromic paint on the surface of the double-coil spring to be tested;
s2, transversely inserting the constraint transverse plates 43 into gaps at the end parts of the double-coil springs, and aligning the end parts of the multiple groups of constraint transverse plates 43;
s3, inserting the constraint screw 44 into the constraint screw hole 41 closest to the double-helical spring until a nut at the top end of the constraint screw 44 tightly presses the constraint transverse plate 43 at the outermost layer;
s4, starting the hydraulic device 3 to perform reciprocating stretching fatigue detection, wherein in the upward movement process, the rubber sleeve 5 is inflated through the air inlet 52, and in the downward pressing process, air in the rubber sleeve 5 is cooled and radiated to the surface of the double-spiral spring restrained and fixed through the restraining clamp 4 through the air outlet 51.
Specifically, the surface of the double-coil spring to be tested is coated with the thermochromic coating, so that the temperature change of the double-coil spring to be tested in the reciprocating stretching process can be reflected through the color change condition of the coating, and a tester can conveniently know the friction heat influence of the stretching fatigue test under different frequencies and different stretching forces on the double-coil spring in time.
Example 2:
referring to fig. 8 to 10, wherein the same or corresponding parts as in embodiment 1 are designated by the same reference numerals as in embodiment 1, only the differences from embodiment 1 are described below for the sake of brevity. This embodiment 2 is different from embodiment 1 in that:
the middle part of restraint diaphragm 43 is two sets of inside hollow concatenation pieces 431 constitution, and the internally mounted of concatenation piece 431 has flexible loop bar 432, and the tip of restraint diaphragm 43 is equipped with concatenates hole 433, and concatenates the inside of hole 433 and be equipped with the arc breach that length is less than concatenates the hole 433 diameter, and the size of arc breach is less than the diameter of elasticity cable 42.
Specifically, when the constraint diaphragm 43 connected in series needs to be taken out, the elastic inhaul cable 42 is extruded and then extruded through the connecting hole 433, so that the separation and separation between the elastic inhaul cable 42 and the constraint diaphragm 43 can be realized, the constraint diaphragm 43 is conveniently taken out, the splicing blocks 431 are separated, the inner telescopic loop bars 432 are pulled and elongated, the length of the constraint diaphragm 43 is increased and used for enclosing to form the vertical rod, the middle part of a test spring with a longer length is prevented from being bent in the stretching process, and the smooth performance in the fatigue test process is ensured.
The telescopic sleeve rod 432 comprises a movable rod and a storage rod, wherein the movable rod is movably connected to the inside of the storage rod, a magnetic attraction layer is arranged on the surface of the movable rod, and a magnetic attraction ring layer which is attracted with the magnetic attraction layer is arranged on the inner wall of the storage rod.
Specifically, the magnetic attraction effect between the magnetic attraction layer and the magnetic attraction ring layer inside the telescopic loop bar 432 can enable a stable positioning relationship to be formed between the stretched movable bar and the storage bar, the storage bar is prevented from sliding down to the inside of the movable bar under the self gravity, the length of the stretched telescopic loop bar 432 is ensured to be stably maintained, in addition, the magnetic attraction effect is not more than 2N, the small magnetic attraction effect also facilitates manual recovery of the telescopic loop bar 432, and the telescopic loop bar is recovered to a minimum length state for recovery into the splicing block 431.
The end part of the constraint diaphragm 43 is connected with a magnetic attraction block, the surface of the constraint fixture 4 is coated with a magnetic attraction coating which is attracted with the magnetic attraction block, and the magnetic attraction effect between the magnetic attraction block and the magnetic attraction coating is 3-5 times of the gravity of the constraint diaphragm 43.
Specifically, when adsorbing constraint diaphragm 43 to the surface of constraint anchor clamps 4, utilize magnetism between magnetism piece and the magnetism to inhale the coating to inhale the effect and can realize stretching back constraint diaphragm 43 and constraint anchor clamps 4 stable the connection, and then have stable spacing effect to enclosing the test of inboard with double helix spring, prevent the bending operation in the test process.
The size of the tail end constraint fixture 4 of the telescopic slide bar is smaller than that of the constraint fixture 4 at the top of the test bench base 1, and the two groups of constraint fixtures 4 are located on the same vertical axis.
Specifically, the constraint fixture 4 above is smaller than the constraint fixture 4 below, so that the constraint transverse plate 43 opposite to the outer side of the double-helical spring for testing cannot be projected and overlapped in the falling process of the constraint fixture 4 above, normal reciprocating stretching operation of the hydraulic device 3 is further guaranteed, and the constraint transverse plate 43 in the standing state can be guaranteed to provide bending prevention protection for the double-helical spring for testing normally.
The foregoing description is only a preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art, within the scope of the present application, should apply to the present application, and all changes and modifications as fall within the scope of the present application.
Claims (10)
1. The utility model provides a titanium alloy double helix spring fatigue testing device, includes testboard base (1), its characterized in that, support frame (2) are installed at the top of testboard base (1), the top of support frame (2) is fixed with hydraulic press (3), the output of hydraulic press (3) is connected with flexible slide bar, the top of testboard base (1) and the tail end of flexible slide bar all are connected with constraint anchor clamps (4), the surface that constraint anchor clamps (4) are close to each other is connected with elastic cable (42), the surface slip of elastic cable (42) has concatenated constraint diaphragm (43), the surface that constraint anchor clamps (4) are close to each other is equipped with constraint screw (41) that are located elastic cable (42) one side, the inside threaded connection of constraint screw (41) has constraint screw (44), the inside of constraint diaphragm (43) is equipped with the screw hole with constraint screw (41) one-to-one.
2. The titanium alloy double-helical spring fatigue testing device according to claim 1, wherein the length of the constraint transverse plate (43) is larger than the diameters of the two groups of constraint clamps (4), and the constraint transverse plate (43) is made of elastic metal materials.
3. The titanium alloy double-helical spring fatigue testing device according to claim 1, wherein the surface of the constraint transverse plate (43) is sleeved with a rubber sleeve (5) with a hollow inside, the surface of the rubber sleeve (5) is symmetrically provided with an air outlet (51) and an air inlet (52), and the inside of the air outlet (51) and the inside of the air inlet (52) are respectively provided with a one-way valve with opposite ventilation directions.
4. A titanium alloy double-helical spring fatigue testing device according to claim 3, wherein the exhaust port (51) is located at the outer side of the air inlet (52), and the rubber sleeve (5) is made of an elastic vinyl material.
5. The titanium alloy double-helical spring fatigue testing device according to claim 1, wherein the size of the tail end constraint fixture (4) of the telescopic sliding rod is smaller than the size of the constraint fixture (4) at the top of the test bench base (1), and the two groups of constraint fixtures (4) are located on the same vertical axis.
6. The titanium alloy double-helical spring fatigue testing device according to claim 1, wherein the depth value of the constraint screw hole (41) is not smaller than the length value of the constraint screw (44), and the inner wall and the outer wall of the constraint screw (44) are connected with threaded rubber sleeves.
7. The titanium alloy double-coil spring fatigue testing device according to any one of claims 1-6, wherein the operation method of the testing device comprises the following testing steps:
s1, before a double-coil spring test is carried out, brushing a layer of thermochromic paint on the surface of the double-coil spring to be tested;
s2, transversely inserting the constraint transverse plates (43) into gaps at the end parts of the double-coil springs, and aligning the end parts of the multiple groups of constraint transverse plates (43);
s3, inserting the constraint screw (44) into a constraint screw hole (41) closest to the double-helical spring until a nut at the top end of the constraint screw (44) tightly presses a constraint transverse plate (43) at the outermost layer;
s4, starting the hydraulic device (3) to perform reciprocating stretching fatigue detection, in the upward moving process, inflating the rubber sleeve (5) through the air inlet (52), and in the downward pressing process, cooling air in the rubber sleeve (5) through the air outlet (51) to the surface of the double-spiral spring restrained and fixed through the restraining clamp (4).
8. The titanium alloy double-helical spring fatigue testing device according to claim 1, wherein the middle part of the constraint diaphragm (43) is composed of two groups of splicing blocks (431) with hollow inside, a telescopic sleeve rod (432) is installed in each splicing block (431), a serial hole (433) is formed in the end part of the constraint diaphragm (43), an arc notch with the length smaller than the diameter of the serial hole (433) is formed in the serial hole (433), and the size of the arc notch is smaller than the diameter of an elastic guy cable (42).
9. The titanium alloy double-coil spring fatigue testing device according to claim 8, wherein the telescopic sleeve rod (432) comprises a movable rod and a containing rod, the movable rod is movably connected to the inside of the containing rod, a magnetic attraction layer is arranged on the surface of the movable rod, and a magnetic attraction ring layer which is attracted with the magnetic attraction layer is arranged on the inner wall of the containing rod.
10. The titanium alloy double-helical spring fatigue testing device according to claim 8, wherein the end part of the constraint transverse plate (43) is connected with a magnetic attraction block, the surface of the constraint fixture (4) is coated with a magnetic attraction coating which is attracted with the magnetic attraction block, and the magnetic attraction effect between the magnetic attraction block and the magnetic attraction coating is 3-5 times of the self gravity of the constraint transverse plate (43).
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| CN202310744295.2A CN116499669B (en) | 2023-06-25 | 2023-06-25 | Titanium alloy double-spiral spring fatigue testing device |
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| CN202310744295.2A CN116499669B (en) | 2023-06-25 | 2023-06-25 | Titanium alloy double-spiral spring fatigue testing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117309364A (en) * | 2023-11-30 | 2023-12-29 | 济南考格尔汽车制造有限公司 | Anti-fatigue testing device and method for vehicle fastener |
| CN117949226A (en) * | 2024-01-24 | 2024-04-30 | 山东天亚汽车部件有限公司 | Automobile cab suspension spring test system |
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| GB618456A (en) * | 1945-06-20 | 1949-02-22 | Jack & Heintz Prec Ind Inc | Centering means for resilient restraining devices |
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| CN117309364B (en) * | 2023-11-30 | 2024-02-06 | 济南考格尔汽车制造有限公司 | Anti-fatigue testing device and method for vehicle fastener |
| CN117949226A (en) * | 2024-01-24 | 2024-04-30 | 山东天亚汽车部件有限公司 | Automobile cab suspension spring test system |
| CN117949226B (en) * | 2024-01-24 | 2024-06-28 | 山东天亚汽车部件有限公司 | Automobile cab suspension spring test system |
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