CN114577628A - Magnesium alloy wheel high-temperature bending fatigue test equipment - Google Patents
Magnesium alloy wheel high-temperature bending fatigue test equipment Download PDFInfo
- Publication number
- CN114577628A CN114577628A CN202210154547.1A CN202210154547A CN114577628A CN 114577628 A CN114577628 A CN 114577628A CN 202210154547 A CN202210154547 A CN 202210154547A CN 114577628 A CN114577628 A CN 114577628A
- Authority
- CN
- China
- Prior art keywords
- temperature
- bending fatigue
- magnesium alloy
- temperature environment
- fatigue test
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005452 bending Methods 0.000 title claims abstract description 69
- 238000009661 fatigue test Methods 0.000 title claims abstract description 57
- 229910000861 Mg alloy Inorganic materials 0.000 title claims abstract description 40
- 238000012360 testing method Methods 0.000 claims abstract description 45
- 238000000034 method Methods 0.000 claims description 7
- 229910001335 Galvanized steel Inorganic materials 0.000 claims description 4
- 239000008397 galvanized steel Substances 0.000 claims description 4
- 229920000742 Cotton Polymers 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 229910001149 41xx steel Inorganic materials 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 230000006978 adaptation Effects 0.000 claims 1
- 230000000452 restraining effect Effects 0.000 claims 1
- 238000012356 Product development Methods 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 description 7
- 239000000956 alloy Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000007619 statistical method Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/002—Test chambers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0023—Bending
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
- G01N2203/0226—High temperature; Heating means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0274—Tubular or ring-shaped specimens
Landscapes
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Pathology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Environmental & Geological Engineering (AREA)
- Environmental Sciences (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A magnesium alloy wheel high-temperature bending fatigue test device comprises a test bed, wherein a working table, a loading shaft, a base plate assembly, an actuator assembly and a high-temperature environment box assembly are carried on the test bed; a central hole is reserved in the table top of the workbench, a loading shaft penetrates through the central hole, the upper end of the loading shaft is connected with the wheel bearing mounting surface, and the lower end of the loading shaft is connected with the actuator assembly through a loading rod; the high-temperature environment box applies a high-temperature environment to the wheels, and applies a bending fatigue test load to the loading shaft below the wheels, so that the bending fatigue life of the magnesium alloy wheels in the high-temperature environment can be detected, the requirements of a bending fatigue testing machine device are met, the detection means of the magnesium alloy wheels are perfected, and the product development efficiency is improved.
Description
Technical Field
The application relates to the field of fatigue tests of wheels, in particular to high-temperature bending fatigue test equipment for a magnesium alloy wheel.
Background
The magnesium alloy material has the characteristics of light weight, high strength, good elastic modulus, good shock absorption and vibration reduction and full recycling, and the automobile wheel manufactured by adopting the magnesium alloy material is the best wheel material after the aluminum alloy material, so that the control performance, the acceleration performance and the braking performance of the automobile can be improved, and the oil can be saved by 10-14%. Compared with the traditional aluminum alloy wheel, the magnesium alloy wheel has the advantages of lighter weight, better mechanical property and the like; along with the continuous improvement of the requirements of automobile light weight and energy conservation and emission reduction in the automobile industry, more and more magnesium alloy wheels are applied to automobiles.
When the vehicle runs on a broken mountain road or other road conditions needing repeated braking, the brake disc can generate 100-250 ℃ local high temperature under repeated braking friction, and the local high temperature can influence the temperature of the wheel through heat conduction or heat radiation. Whereas magnesium alloys have a high sensitivity to temperature variations: compared with the room temperature environment (25 ℃), the yield strength of the magnesium alloy material is reduced by 14.2 percent and the tensile strength is reduced by 40.5 percent under the high temperature environment (140 ℃). At present, however, no test equipment and test method for detecting the fatigue performance of the magnesium alloy wheel in a thermal environment are available at home and abroad.
Disclosure of Invention
In order to solve the technical problems, the invention provides the high-temperature bending fatigue test equipment for the magnesium alloy wheel, which can effectively detect the influence of a high-temperature environment on the fatigue life of the magnesium alloy wheel, thereby perfecting the detection means of the magnesium alloy wheel and improving the product development efficiency.
In order to achieve the above object, the present invention provides the following technical solutions:
a magnesium alloy wheel high-temperature bending fatigue test device comprises a test bed, wherein a working table, a loading shaft, a base plate assembly, an actuator assembly and a high-temperature environment box assembly are carried on the test bed; a central hole is reserved in the table top of the workbench, a loading shaft penetrates through the central hole, the upper end of the loading shaft is connected with the wheel bearing mounting surface, and the lower end of the loading shaft is connected with the actuator assembly through a loading rod; the actuator assembly applies bending fatigue test load to the wheels, the base plate assembly adaptive to the wheels of different models is placed on the table top of the workbench, and the bottom of the box body of the high-temperature environment box assembly is designed to be an opening and inverted on the workbench and used for applying a high-temperature environment to the wheels.
In some embodiments of the invention, the workbench comprises a workbench surface and a support column, the support column is fixed on the test bench and is connected with the test bench and the workbench surface, the workbench surface is provided with a central hole, and T-shaped grooves are uniformly distributed around the central hole.
In some embodiments of the invention, the thickness of the working table top is 45-55 mm, and the diameter of the central hole of the working table top is 140 mm; t type groove length is 250mm ~300mm, 45 in every interval between the T type groove.
In some embodiments of the invention, the struts are arranged at an inclination angle of 5 ° to 10 ° to the work surface.
In some embodiments of the present invention, the loading shaft includes a shaft, and a flange and a wear pad on the top of the shaft, the upper end of the shaft is connected to the flange, the lower end of the shaft is connected to a connecting rod through a knuckle bearing, and the connecting rod is connected to the actuator assembly; the flange plate is provided with bolt holes for fixing wheels, and the wear-resistant sheet is arranged between the flange plate and the wheel bearing mounting surface.
In some embodiments of the invention, the loading shaft arm has a length of 700mm to 800 mm; the thickness of the wear-resistant sheet is 5-10 mm, and the wear-resistant sheet is made of 42 CrMo.
In some embodiments of the invention, the shim plate assembly comprises a plurality of shim plates having different thicknesses of 5-20 cm.
In some embodiments of the present invention, the actuator assembly includes two sets of actuators vertically disposed on a test bed, and a reaction support base, the lower end of the reaction support base is connected to the test bed, and the actuators are mounted on the reaction support base.
In some embodiments of the present invention, the high temperature environment box assembly includes a high temperature environment box, an equipment frame, a screw rod lifter, and a guide rail slider assembly, wherein two sides of the high temperature environment box are connected to the equipment frame through the guide rail slider assembly, and are used for restricting the left and right swinging of the high temperature environment box during the lifting process; the base of the screw rod lifter is connected to the upper end of the equipment frame through a bolt, and the lower end of a screw rod of the screw rod lifter is connected with the high-temperature environment box; the outer wall of the box body of the high-temperature environment box is a cold-rolled galvanized steel plate, the surface of the cold-rolled galvanized steel plate is subjected to electrostatic plastic spraying, and the thickness of the plate is more than or equal to 1.5 mm; the inner wall of the box body is formed by fully welding ST430 steel plates, and the thickness of the plates is more than or equal to 1 mm; the middle heat-insulating layer is a glass fiber cotton heat-insulating material; the box body is provided with an observation window in the width direction, and the observation window is made of double-layer hollow glass; the high-temperature environment box air supply system adopts an axial flow fan to downwards supply air in a two-side air return mode, and adopts a heater to heat the air, and a temperature controller of the high-temperature environment box temperature control system and the box body are designed into a whole.
In some embodiments of the present invention, the operating temperature range of the high temperature environment box is: RT +10 ℃ - +180 ℃, temperature fluctuation: ± 3 ℃, temperature uniformity: the temperature rise rate is less than or equal to +/-2 ℃: RT +10 to +180 ℃ for less than or equal to 30 min.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the high-temperature environment is applied to the wheel through the high-temperature environment box, and meanwhile, the bending fatigue test load is applied to the loading shaft at the lower part, so that the test equipment can detect the bending fatigue life of the magnesium alloy wheel in the high-temperature environment, the requirements of the bending fatigue test machine equipment are met, the detection means of the magnesium alloy wheel is perfected, and the product development efficiency is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic view of the overall structure of a high-temperature bending fatigue test device for a magnesium alloy wheel according to the present application.
FIG. 2 is a schematic structural diagram of a workbench of the high-temperature bending fatigue test equipment for the magnesium alloy wheel.
FIG. 3 is a schematic structural view of a loading shaft of the high-temperature bending fatigue test equipment for a magnesium alloy wheel.
FIG. 4 is a schematic structural diagram of a backing plate of the high-temperature bending fatigue test equipment for the magnesium alloy wheel.
FIG. 5 is a schematic structural diagram of an actuator assembly of the magnesium alloy wheel high-temperature bending fatigue test apparatus according to the present application.
FIG. 6 is a schematic structural diagram of a high-temperature environment box assembly of the high-temperature bending fatigue test equipment for the magnesium alloy wheel.
In the figure: 1-a test bed, 2-a workbench, 3-a loading shaft, 4-a backing plate component, 5-an actuator assembly and 6-a high-temperature environment box assembly; 201-working table surface, 202-supporting column, 203-T-shaped groove, 204-central hole, 301-shaft lever, 302-flange plate, 303-wear-resistant plate, 304-knuckle bearing, 305-connecting rod, 401-backing plate, 501-hydraulic actuator counter force supporting seat, 502-hydraulic actuator, 601-high temperature environment box, 602-equipment frame, 603-lead screw lifter and 604-guide rail sliding block component.
Detailed Description
The description and claims of this application refer to the data "comprising" and "having" and any variations thereof which are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
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 obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Example 1: preparation of magnesium alloy wheel high-temperature bending fatigue test equipment
The embodiment 1 provides a high-temperature bending fatigue test device for a magnesium alloy wheel. As shown in fig. 1, the test bed comprises a test bed 1, a workbench 2, a loading shaft 3, a backing plate component 4, an actuator assembly 5 and a high-temperature environment box assembly 6. The workbench 2 is fixed on the test bed 1 through bolts, and a central hole is reserved in the center of the table top and used for penetrating through the loading shaft 3; the upper end of the loading shaft 3 is connected with a wheel bearing mounting surface, and the lower end of the loading shaft is connected with the actuator assembly 5 through a loading rod; the actuator assembly 5 needs 2 sets, is vertically arranged, is fixed on the test bed 1 through bolts and is used for applying bending fatigue test load to the wheels; the base plate assembly 4 is placed on the table top of the workbench 2 and is used for adapting to wheels of different models; the bottom of the high-temperature environment box assembly 5 is designed to be open and is buckled on the workbench 2 for applying a high-temperature environment to the wheels.
As shown in fig. 2, the work table 2 includes a work table 201 and a support column 202. The size of the working table top is 1m multiplied by 1m, the thickness is 50mm, the diameter of the center hole of the working table top is 140mm, and the working table top is used for penetrating through the loading shaft 3; t-shaped grooves with the length of 275mm are machined on the table surface every 45 degrees, the T-shaped grooves are machined according to GB/T158-1996 'T-shaped grooves and corresponding bolts of a machine tool workbench', and the basic size A is 22 mm. The number of the support columns 202 is 4, the height is 750mm, the support columns are arranged at four corners of the worktable surface 201, the upper parts of the support columns 202 are connected with the worktable surface through 4M 20 bolts, and the lower parts of the support columns 202 are connected with the test bed 1 through 4M 24 bolts; in order to increase the rigidity of the working platform 2, the supporting column 202 and the working platform 201 are arranged at an inclination angle of 7.5 degrees.
As shown in fig. 3, the loading shaft 3 includes a shaft 301, a flange 302, a wear pad 303, a knuckle bearing 304, and a connecting rod 305. The length of the force arm of the loading shaft 3 is 750 mm; the upper end of the shaft rod 301 is connected with the flange plate 302 through bolts, the lower end of the shaft rod is connected with the knuckle bearing 304, and the knuckle bearings 304 are installed in a manner that 2 sets are needed and are perpendicular to each other; bolt holes matched with wheels are machined in the flange plate 302 and used for fixing the wheels; the other end of the knuckle bearing 304 is connected with the actuator 5 assembly through the connecting rod 305; the wear-resistant plate 303 is placed between the flange plate 302 and the wheel bearing mounting surface, the thickness of the wear-resistant plate is 5mm, and the wear-resistant plate is made of 42CrMo and used for preventing the flange plate 302 from being worn quickly.
As shown in fig. 4, the thickness of the backing plate assembly 4 comprises a backing plate 401 of 5mm, a backing plate 402 of 10mm and a backing plate 403 of 20mm, the diameter is 750mm, and the manufacturing material is high-strength aluminum alloy; the wheel is placed between the inner rims of the wheels and the working table surface 201 and is used for adapting the offset values of wheels of different models.
As shown in fig. 5, the actuator assembly 5 includes a hydraulic actuator reaction support 501 and a 50kN hydraulic actuator 502. The lower end of the actuator reaction supporting seat 501 is connected with the test bed 1, and the 50kN hydraulic actuator 502 is connected with the hydraulic actuator reaction supporting seat 501 through a bolt, so that the actuator reaction supporting seat 501 can move up and down.
Apply wheel bending load through actuator assembly loading, the concrete mode is that two actuator assemblies mutually perpendicular arrange, be respectively cross axle actuator assembly and axis of ordinates actuator assembly: the transverse axis actuator assembly loading load F1= Msin (a)/L, and the longitudinal axis actuator assembly loading load F2= Msin (90 ° -a)/L; in the formula: m is bending fatigue test bending moment (Nm), L is loading shaft moment arm (M), and alpha is an included angle (DEG) between the loading resultant force direction of the actuator assembly and the transverse shaft.
As shown in fig. 6, the hot environment box assembly 6 includes a hot environment box 601, an equipment frame 602, a lead screw elevator 603, and a guide rail slider assembly 604. Two sides of the high-temperature environment box 601 are connected with the equipment frame 602 through the guide rail sliding block assemblies 604 and are used for restricting the left and right swinging of the high-temperature environment box 601 in the lifting process; the base of the screw rod lifter 603 is connected to the upper end of the equipment frame 602 through a bolt, and the lower end of the screw rod lifter 603 is connected with the high-temperature environment box 601. The lifting speed of the lead screw lifter 603 is 250mm/min, and the lifting height of the high-temperature environment box 601 is 600 mm.
The internal dimensions of the high-temperature environment tank 601 are: 830mm (width) x 600mm (height) x 830mm (depth); external dimensions: 1230mm (width) by 1350mm (height) by 1030mm (depth); the outer wall of the box body is made of a cold-rolled galvanized steel plate, the surface of the box body is subjected to electrostatic plastic spraying, and the thickness of the box body is 1.5 mm; the box inner wall material is ST430 steel plate full weld, the plate thickness is 1.2 mm; the middle heat-insulating layer is a glass fiber cotton heat-insulating material; the box does not set up the door, sets up observation window, size at width direction: 250mm multiplied by 350mm, and the observation window adopts double-layer hollow glass; the lower end of the box body is provided with an opening, the box body is connected in a hasp mode, and the connection part is sealed through a silica gel sealing strip; and 150 mm testing hole is reserved in the side surface of the box body and used for externally connecting a testing power line and a signal. The high-temperature environment box 601 air supply system adopts an axial flow fan to supply air in a downward pressing mode, adopts a two-side air return mode and adopts a heater to heat air. The temperature controller of the temperature control system of the high-temperature environment box 601 and the box body are designed integrally, a thermocouple signal and a thermal resistance signal can be accessed, and a display screen is a 4.3-inch touch screen and can display multiple interfaces such as a monitoring picture, a curve picture, a setting picture and the like; temperature control range: 0-200 ℃; and (3) control precision: the full range is 0.5%; and 1 temperature sensor 1 is arranged at the air outlet and used for reading temperature data in the box body.
The equipment frame 602 is formed by welding square pipes and is used for fixing the high-temperature environment box 601; the overall dimensions of the frame are 1500mm by 1300mm by 2850 mm.
The working temperature range of the high-temperature environment box is as follows: RT +10 ℃ - +180 ℃, temperature fluctuation: ± 3 ℃, temperature uniformity: ± 1.8 ℃, temperature rise rate: RT +10 ℃ to +180 ℃ for 27 min.
Example 2: DMS sample wheel preparation
This embodiment 2 provides a DMS appearance wheel for high temperature bending fatigue testing machine calibration, what DMS appearance wheel selected to use is the supporting 18 cun magnesium alloy wheels of certain joint qualification brand, and the wheel structural parameter is: the diameter of the central hole is 66.5mm, the width of the rim is 190.5mm, the wheel offset distance is 51mm, and the PCD is 112 mm; the production process comprises casting and spinning. Through simulation analysis, maximum and second largest damage hot spots in a wheel bending fatigue test are obtained, and the strain gauges are pasted and named as CH1 and CH 2.
Comparative example 1: strain comparison of conventional bending fatigue testing machine and high-temperature bending fatigue testing machine
The DMS-sample wheel obtained by the implementation 3 was mounted on a conventional bending fatigue testing machine with a wheel mounting torque of 140Nm ± 10 Nm; the loading torques were 1920Nm, 3060Nm, 4000Nm and 5190Nm, the test rotational speeds were 1500r/min, and the statistical strain minimum, maximum and amplitude values were as shown in Table 1.
TABLE 1 Strain Collection results of conventional bending fatigue testing machine
Mounting the DMS sample wheel obtained by the implementation 3 on a high-temperature bending fatigue testing machine, wherein the mounting torque of the wheel is 140Nm +/-10 Nm; the loading torque is 1920Nm, 3060Nm, 4000Nm and 5190Nm, the loading force arm of the equipment is 750mm, the corresponding loading loads are 2560N, 4080N, 5333N and 6920N, the loading mode is sine and cosine curve loading, the phase difference of the two actuators is 90 degrees, and the loading frequency is 5Hz, namely the loading rotating speed is 300 r/min; statistical strain minimum, maximum and amplitude values, as shown in table 2.
TABLE 2 Strain Collection results of high-temperature bending fatigue testing machine
Comparing the two sets of data, as shown in table 3, the strain amplitude deviation of the conventional bending fatigue testing machine and the high-temperature bending fatigue testing machine is less than +/-4% and meets the requirement that the equipment tolerance of the conventional bending fatigue testing machine is less than +/-5%.
TABLE 3 comparison of Strain results
Comparative example 2: comparison of fatigue life of conventional bending fatigue testing machine and high-temperature bending fatigue testing machine at normal temperature
Mounting a test sample wheel on a conventional bending fatigue testing machine, wherein the mounting torque of the wheel is 140Nm +/-10 Nm; the loading torque is 5190Nm, the test rotating speed is 1500r/min, and the test temperature is 25 ℃ at room temperature; the total number of 4 test sample wheels is 1-1, 1-2, 1-3 and 1-4, and the service life of the bending fatigue test is counted and shown in Table 4.
TABLE 4 flexural fatigue machine test data (Room temperature 25 deg.C)
Mounting a test sample wheel on a high-temperature bending fatigue testing machine, wherein the mounting torque of the wheel is 140Nm +/-10 Nm; the loading torque is 5190Nm, the test rotating speed is 300r/min, and the test temperature is 25 ℃ at room temperature; the total number of 4 test sample wheels is 2-1, 2-2, 2-3 and 2-4, and the service life of the bending fatigue test is counted and shown in Table 5.
TABLE 5 high temperature bending fatigue machine test data (Room temperature 25 deg.C)
From the test data, the service life of the conventional bending fatigue testing machine is 307182 times, the service life of the high-temperature bending fatigue testing machine is 316515 times, and the consistency is good.
Example 3: temperature-wheel stiffness data measurement
Mounting a test sample wheel on a high-temperature bending fatigue testing machine for the wheel, wherein the mounting torque of the wheel is 140Nm +/-10 Nm; the rigidity values of the wheel at room temperature (25 ℃), 80 ℃, 100 ℃ and 120 ℃ were measured, respectively. The measured loads were 1kN, 1.5kN, 2kN, 2.5kN and 3 kN. The statistical data collected are shown in table 6; statistical analysis of the load-offset data resulted in wheel stiffness data as shown in table 7.
TABLE 6 temperature-offset test data statistics
TABLE 7 temperature-rigidity data statistics
From the experimental data, it can be seen that as the temperature increases, the wheel stiffness decreases: the rigidity of the wheel is reduced by 2.5 percent at a temperature of 80 ℃ compared with 25 ℃, 3.2 percent at a temperature of 100 ℃ compared with 25 ℃, and 7.2 percent at a temperature of 120 ℃ compared with 25 ℃.
Example 4: temperature-bending fatigue life data measurement
Mounting a test sample wheel on a high-temperature bending fatigue testing machine, wherein the mounting torque of the wheel is 140Nm +/-10 Nm; the bending fatigue test life of the wheel at 60 ℃, 80 ℃ and 120 ℃ is respectively measured, the loading torque is 5190Nm, and the test rotating speed is 300 r/min. Before the test is started, the wheel is heated to the specified temperature, and the temperature is preserved for 30min, so that the overall temperature of the wheel reaches the specified temperature of the test. The statistical wheel bending fatigue life is shown in table 8.
TABLE 8 temperature-bending fatigue Life statistics
From the test data, it can be seen that the wheel bending fatigue life decreases significantly with increasing temperature: the bending fatigue life of the wheel is reduced by 50.3 percent compared with the normal temperature of 25 ℃ at the temperature of 60 ℃; the bending fatigue life of the wheel is reduced by 51.0 percent compared with the normal temperature of 25 ℃ at the temperature of 80 ℃; compared with the normal temperature of 25 ℃, the bending fatigue life of the wheel is reduced by 64.7 percent at 120 ℃.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the high-temperature environment is applied to the wheel through the high-temperature environment box, and meanwhile, the bending fatigue test load is applied to the loading shaft at the lower part, so that the test equipment can detect the bending fatigue life of the magnesium alloy wheel in the high-temperature environment, the requirements of the bending fatigue test machine equipment are met, the detection means of the magnesium alloy wheel is perfected, and the product development efficiency is improved.
Claims (10)
1. The utility model provides a magnesium alloy wheel high temperature bending fatigue test equipment, includes test bench (1), its characterized in that: the test bed (1) is provided with a working table (2), a loading shaft (3), a base plate assembly (4), an actuator assembly (5) and a high-temperature environment box assembly (6); a central hole (204) is reserved in the table top of the workbench (2), a loading shaft (3) penetrates through the central hole (204), the upper end of the loading shaft (3) is connected with a wheel bearing mounting surface, and the lower end of the loading shaft is connected with the actuator assembly (5) through a loading rod; actuator assembly (5) applys bending fatigue test load to the wheel, place backing plate subassembly (4) of the different model wheels of adaptation on workstation (2) mesa, high temperature environment box assembly (6) bottom half is the opening design, inverts and is in on workstation (2) for apply high temperature environment to the wheel.
2. The magnesium alloy wheel high temperature bending fatigue test apparatus according to claim 1, wherein: the working table (2) comprises a working table top (201) and a support column (202), the support column (202) is fixed on the test table (1) and connected with the test table (1) and the working table top (201), a central hole (204) is formed in the working table top (201), and T-shaped grooves (203) are uniformly distributed around the central hole (204).
3. The magnesium alloy wheel high temperature bending fatigue test apparatus as set forth in claim 2, wherein: the thickness of the working table top (201) is 45-55 mm, and the diameter of the central hole (204) of the table top is 140 mm; t type groove (203) length is 250mm ~300mm, and every T type groove (203) interval 45 between.
4. The magnesium alloy wheel high-temperature bending fatigue test equipment as set forth in claim 3, wherein: the support column (202) and the working table top (201) are arranged in an inclination angle of 5-10 degrees.
5. The magnesium alloy wheel high temperature bending fatigue test apparatus as set forth in claim 1, wherein: the loading shaft (3) comprises a shaft rod (301), and a flange plate (302) and a wear-resistant plate (303) which are arranged at the top of the shaft rod (301), the upper end of the shaft rod (301) is connected with the flange plate (302), the lower end of the shaft rod (301) is connected with a connecting rod (305) through a joint bearing (304), and the connecting rod (305) is connected with the actuator assembly (5); bolt holes for fixing the wheel are machined in the flange plate (302), and the wear-resistant plate (303) is placed between the flange plate (302) and a wheel bearing mounting surface.
6. The magnesium alloy wheel high temperature bending fatigue test apparatus as set forth in claim 5, wherein: the length of the force arm of the loading shaft (3) is 700-800 mm; the thickness of the wear-resistant sheet (303) is 5-10 mm, and the wear-resistant sheet is made of 42 CrMo.
7. The magnesium alloy wheel high temperature bending fatigue test apparatus as set forth in claim 1, wherein: the pad plate assembly (4) comprises a plurality of pad plates (401) with different thicknesses of 5-20 cm.
8. The magnesium alloy wheel high temperature bending fatigue test apparatus as set forth in claim 1, wherein: the actuator assembly (5) comprises two sets of actuators and a counter-force supporting seat, wherein the two sets of actuators and the counter-force supporting seat are vertically arranged on the test bed (1), the lower end of the counter-force supporting seat is connected with the test bed (1), and the actuators are arranged on the counter-force supporting seat.
9. The magnesium alloy wheel high-temperature bending fatigue test equipment as claimed in claim 1, wherein the high-temperature environment box assembly (6) comprises a high-temperature environment box (601), an equipment frame (602), a lead screw lifter (603) and a guide rail slider assembly (604), wherein two sides of the high-temperature environment box (601) are connected with the equipment frame (602) through the guide rail slider assembly (604) and are used for restraining the left and right swinging of the high-temperature environment box (601) in the lifting process; the base of the lead screw lifter is connected to the upper end of the equipment frame (602) through a bolt, and the lower end of a lead screw of the lead screw lifter (603) is connected with the high-temperature environment box (601); the outer wall of the box body of the high-temperature environment box (601) is a cold-rolled galvanized steel plate, the surface is subjected to electrostatic plastic spraying, and the thickness of the plate is more than or equal to 1.5 mm; the inner wall of the box body is formed by fully welding ST430 steel plates, and the thickness of the plates is more than or equal to 1 mm; the middle heat-insulating layer is a glass fiber cotton heat-insulating material; the box body is provided with an observation window in the width direction, and the observation window is made of double-layer hollow glass; the air supply system of the high-temperature environment box (601) adopts an axial flow fan to supply air in a downward pressing mode, air return modes are arranged on two sides of the high-temperature environment box, a heater is adopted to heat the air, and a temperature controller of the temperature control system of the high-temperature environment box (601) and the box body are designed into a whole.
10. The magnesium alloy wheel high temperature bending fatigue test apparatus as set forth in claim 9, wherein: the working temperature range of the high-temperature environment box (601) is as follows: RT +10 ℃ - +180 ℃, temperature fluctuation: ± 3 ℃, temperature uniformity: the temperature rise rate is less than or equal to +/-2 ℃: RT +10 to +180 ℃ for less than or equal to 30 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210154547.1A CN114577628A (en) | 2022-02-21 | 2022-02-21 | Magnesium alloy wheel high-temperature bending fatigue test equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210154547.1A CN114577628A (en) | 2022-02-21 | 2022-02-21 | Magnesium alloy wheel high-temperature bending fatigue test equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114577628A true CN114577628A (en) | 2022-06-03 |
Family
ID=81773062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210154547.1A Pending CN114577628A (en) | 2022-02-21 | 2022-02-21 | Magnesium alloy wheel high-temperature bending fatigue test equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114577628A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103175702A (en) * | 2011-12-20 | 2013-06-26 | 南车青岛四方机车车辆股份有限公司 | Fatigue test device and method for axle |
| CN203069366U (en) * | 2013-01-09 | 2013-07-17 | 西南交通大学 | High and low temperature fatigue test bench for railway-vehicle wheel shaft |
| CN204202867U (en) * | 2014-11-27 | 2015-03-11 | 河北联合大学 | A kind of SCM Based wheel bending fatigue testing device |
| CN205426461U (en) * | 2015-12-15 | 2016-08-03 | 中国燃气涡轮研究院 | Fatigue test uses hot loading device |
| CN107436237A (en) * | 2017-06-05 | 2017-12-05 | 上海交通大学 | A kind of helicopter hub center non-torque loading simulator |
| CN107655646A (en) * | 2017-09-19 | 2018-02-02 | 北京特种机械研究所 | A kind of rice font test fixture suitable for different structure product vibration test |
| CN108562429A (en) * | 2018-05-31 | 2018-09-21 | 西南交通大学 | Interference fit component fatigue experimental device based on rotoflector and test method |
| CN209326955U (en) * | 2019-01-15 | 2019-08-30 | 中信戴卡股份有限公司 | Hydraulic actuator counter-force support base |
| US20190271613A1 (en) * | 2016-10-21 | 2019-09-05 | Mg-Valdunes | Apparatus for testing a shaft and/or a mechanical part on the shaft and use of such an apparatus |
-
2022
- 2022-02-21 CN CN202210154547.1A patent/CN114577628A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103175702A (en) * | 2011-12-20 | 2013-06-26 | 南车青岛四方机车车辆股份有限公司 | Fatigue test device and method for axle |
| CN203069366U (en) * | 2013-01-09 | 2013-07-17 | 西南交通大学 | High and low temperature fatigue test bench for railway-vehicle wheel shaft |
| CN204202867U (en) * | 2014-11-27 | 2015-03-11 | 河北联合大学 | A kind of SCM Based wheel bending fatigue testing device |
| CN205426461U (en) * | 2015-12-15 | 2016-08-03 | 中国燃气涡轮研究院 | Fatigue test uses hot loading device |
| US20190271613A1 (en) * | 2016-10-21 | 2019-09-05 | Mg-Valdunes | Apparatus for testing a shaft and/or a mechanical part on the shaft and use of such an apparatus |
| CN110770562A (en) * | 2016-10-21 | 2020-02-07 | 马钢-瓦顿公司 | Device for testing a shaft and/or a mechanical component mounted on a shaft and use of such a device |
| CN107436237A (en) * | 2017-06-05 | 2017-12-05 | 上海交通大学 | A kind of helicopter hub center non-torque loading simulator |
| CN107655646A (en) * | 2017-09-19 | 2018-02-02 | 北京特种机械研究所 | A kind of rice font test fixture suitable for different structure product vibration test |
| CN108562429A (en) * | 2018-05-31 | 2018-09-21 | 西南交通大学 | Interference fit component fatigue experimental device based on rotoflector and test method |
| CN209326955U (en) * | 2019-01-15 | 2019-08-30 | 中信戴卡股份有限公司 | Hydraulic actuator counter-force support base |
Non-Patent Citations (1)
| Title |
|---|
| 胡志强 编著: "《环境与可靠性试验应用技术》", 31 August 2016, 中国质检出版社、中国标准出版社, pages: 148 - 150 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104990713B (en) | Automobile brake assembly fatigue test stand | |
| CN103048136B (en) | High and low temperature environment service life testing machine for joint bearing | |
| CN106840632A (en) | A kind of detection means and detection method of high-speed train braking nipper units | |
| Chen et al. | The failure prediction of a brake disc due to nonthermal or mechanical stresses | |
| CN205981630U (en) | Car rubber bush load pressure detection device | |
| CN210322278U (en) | Static strength test bench for brake | |
| CN202814614U (en) | Clamping force detection tool for railway vehicle braking clamp | |
| CN114878182B (en) | Heat fading performance test method for automobile brake system | |
| CN114577628A (en) | Magnesium alloy wheel high-temperature bending fatigue test equipment | |
| CN110160810B (en) | Method for testing rolling resistance of tire under indoor multiple working conditions | |
| CN103592069B (en) | Rail vehicle braking clamp clamping force detects frock and detection method | |
| CN214384531U (en) | Simulated pavement rotary drum and automobile test equipment | |
| Wang et al. | Numerical analysis of dynamic response: Fatigue behaviour analysis of Al alloy-CFRP riveted single-shear lap joints | |
| WO2020037773A1 (en) | Underframe equipment suspension seat | |
| Ahmed et al. | Design and analysis of disc brake rotor using different profiles | |
| CN107584966B (en) | Wheel noise reduction method and multi-layer wheel noise reduction block | |
| CN211291381U (en) | Special bumper checking fixture | |
| CN110261102B (en) | Device for testing load-sharing coefficient of small-modulus planetary gear train | |
| CN113278788A (en) | Composite device and method for eliminating residual stress of welding line | |
| CN202012566U (en) | Hub bearing unit of automobile | |
| CN207050997U (en) | A kind of suspension system long duration test loading device | |
| CN106546494B (en) | Automobile hub rotary bending testing machine | |
| CN114486595B (en) | Drum brake piece wear degree testing arrangement suitable for different braking speeds | |
| CN205941019U (en) | Many function test platform truck | |
| CN221100566U (en) | Brake temperature resistance detection device of brake block |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |