CN108593473B - Constant temperature and humidity environment wear-resisting test box - Google Patents
Constant temperature and humidity environment wear-resisting test box Download PDFInfo
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- CN108593473B CN108593473B CN201810129284.2A CN201810129284A CN108593473B CN 108593473 B CN108593473 B CN 108593473B CN 201810129284 A CN201810129284 A CN 201810129284A CN 108593473 B CN108593473 B CN 108593473B
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- 238000012360 testing method Methods 0.000 title claims abstract description 58
- 239000000463 material Substances 0.000 claims abstract description 70
- 230000000149 penetrating effect Effects 0.000 claims abstract description 3
- 230000007246 mechanism Effects 0.000 claims description 8
- 239000012752 auxiliary agent Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 7
- 238000005299 abrasion Methods 0.000 description 10
- 239000011521 glass Substances 0.000 description 9
- 230000033001 locomotion Effects 0.000 description 8
- 238000011156 evaluation Methods 0.000 description 5
- 239000000843 powder Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Classifications
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- 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
- G01N3/56—Investigating resistance to wear or abrasion
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/02—Measuring coefficient of friction between materials
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- 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
- G01N2203/003—Generation of the force
- G01N2203/005—Electromagnetic 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
- G01N2203/022—Environment of the test
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
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- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention discloses a constant temperature and humidity environment wear-resistant test box, in particular to a constant temperature and humidity environment wear-resistant test box, and relates to the technical field of wear resistance tests. The invention comprises a box body (1), a driving motor (3) outside the box body (1), a driving motor (3) fixing bracket (2) and an electric appliance control box (4); the box body (1) is a sealed constant temperature and humidity environment; the box body (1) is internally provided with a driving shaft (5), the upper part of the driving shaft is connected with a driving disc (7), the lower end of the driving shaft (5) is fixedly connected with a coupler (6) extending out of the box body (1), and the other end of the coupler (6) is fixedly connected with a driving motor (3); a clamping arm (10) penetrating through the electric appliance control box (4) and the box body (1) and used for fixing a material to be tested is arranged; the spherical or flat end surface of the round bar-shaped material (9) is in relatively vertical contact with the wafer-shaped material (8). The method is suitable for rapid testing of the wear resistance of mechanical part materials including automobile parts and the like in various temperature and humidity environments.
Description
Technical Field
The invention relates to the technical field of wear resistance testing, in particular to a constant temperature and humidity environment wear resistance test box which is suitable for rapid testing of wear resistance of mechanical part materials including automobile parts and the like in various temperature and humidity environments.
Background
In the product structure of the automobile glass lifter, the sliding block for bearing the automobile glass is restrained by the guide rail to do sliding movement up and down, and relative sliding friction movement is generated between the sliding block and the guide rail, so that the sliding block and the guide rail can be worn, and how to select the optimal sliding block material and the surface treatment material of the guide rail is a great difficulty in the design of the glass lifter product. An antifriction test is required to be designed, and the selected materials are subjected to test comparison; if the abrasion resistance test is arranged on an actual vehicle door, the actual abrasion resistance of the material cannot be objectively reflected by the test result because the working stress of the sliding block in the glass lifter system is complex, namely the contact pressure of the sliding block and the guide rail is not constant, and the actual and effective abrasion resistance result cannot be obtained; the motor used in the test is an intermittent motor, the test period needs to be frequently subjected to heat dissipation, the test period is long, and the test cost is high; the wear resistance can only be subjectively judged, and an objective wear amount evaluation is difficult to carry out; the wear resistance evaluation and the selection of materials are not great.
In general, when materials are selected, a wear resistance test for the materials is designed, and the test environment simulates the actual working environment of the parts as much as possible to detect the wear resistance of the two materials. Currently, most of the abrasion resistance test devices on the market are formed by processing two materials into required shapes: one material is processed into a flat sheet part with the length of more than 100mm, the other material is processed into a rod part, the two parts are contacted with each other at a set pressure, one part is static, the other part performs reciprocating linear motion, and after a set period is run, the abrasion loss of the material is evaluated through subjective evaluation of abrasion traces and comparison of weight loss before and after the test (shown in the attached figure 1); and carrying out subjective evaluation on noise generated by friction in the test process, and finally forming wear resistance data of the material. In the existing wear-resistant test equipment in the market, a screw transmission structure is generally adopted in a driving part of the wear-resistant test equipment for driving a test body needing to reciprocate, and the structure has several defects: 1. the running distance of the material is shorter, and the material can only run for about 100mm (if the screw is too long, after being stressed, the middle part of the screw generates bending deformation, and the constant pressure in the running process cannot be ensured); 2. the running speed is not high, the linear speed is difficult to exceed 80mm/s, and the running speed of the automobile glass lifter cannot be met: 60-160 mm/s; 3. some electronic components and motion mechanisms in the equipment are difficult to withstand high-temperature and high-humidity working environments; only the evaluation and comparison of the normal temperature wear resistance of the material can be completed, and the test under the high temperature and high humidity environment can not be performed. The wear resistance of many nonmetallic materials is not linear in the environment of different temperatures and humidity, so that the wear resistance of the materials in different temperature ranges and different humidity environments needs to be evaluated; 4. the single movement stroke of the test piece is only about 100mm, and the single movement stroke of most automobile glass lifters is 400-550 mm, and the distance of one single movement can be achieved only by 4-5 times of reciprocating movement of the test piece; the test pieces generate abrasion powder in the test process, the powder can participate in a friction test, the test method is equivalent to the accumulated cycle number of forward and reverse friction of two test pieces in a short distance, the abrasion powder is different from the actual working state of the part, and the generated abrasion quantity is different from the actual working state.
Disclosure of Invention
The invention aims to overcome the defects and the shortcomings in the prior art and provides a constant temperature and humidity environment wear-resistant test box.
According to the invention, based on the fact that the driving disc is driven to rotate by the motor, the wafer to be tested and the round bar to be tested form relative friction, the rotating speed and the angle of the motor are set to rotate forward and backward, and the linear speed at the round bar to be tested can be easily ensured to meet the requirement. The torque change value of the test piece before and after contact can be monitored through a torque curve output by a torque sensor on the coupler, so that the friction force value of the round bar to be tested and the round disc can be calculated, the torque (N.m) =the friction force (N) ×radius (mm), and meanwhile, the change condition of the friction coefficient can be indirectly monitored.
A constant temperature and humidity environment wear-resistant test box (shown in figure 2) comprises a box body, a driving motor outside the box body, a driving motor fixing bracket and an electric appliance control box.
The box body is a sealed constant temperature and humidity environment with the temperature range of 40 ℃ below zero to 120 ℃ and the relative humidity range of 10 percent to 90 percent;
the driving shaft is arranged in the box body, the upper part of the driving shaft is connected with the driving disc, the lower end of the driving shaft is fixedly connected with a coupler extending out of the box body, and the other end of the coupler is fixedly connected with the driving motor;
and a clamping arm penetrating through the electric appliance control box and the box body and used for fixing the material to be tested is also arranged.
The material to be tested comprises a material to be tested which is processed into a round bar shape material and a material to be tested which is processed into a wafer body;
wherein,
The disc body material is fixedly connected with a disc-shaped driving disc through two bolts with disc-shaped gaskets;
One end of the clamping arm is fixedly connected with the round bar-shaped material, and the other end of the clamping arm extends out of the box body and is connected with a stress application mechanism in the electric appliance control box, so that the pressure between the round bar-shaped material and the round disc-shaped material is kept constant;
The spherical or flat end surface of the round bar-shaped material is in relatively vertical contact with the wafer body material.
A torque sensor for detecting a torque value from the driving disc is arranged in the coupler; the stress application mechanism comprises a pressure sensor for displaying data.
In summary, the wear-resistant test equipment is used in combination with a constant temperature and humidity environment test box, different auxiliary agents, a small amount of mechanical components and partial sensing devices can be added to a friction surface and are arranged in the constant temperature and humidity environment test box, most of control electric appliance elements and main driving mechanical parts are arranged outside the constant temperature and humidity environment test box body, the constant temperature and humidity environment test box can provide a temperature range of-40 ℃ to 120 ℃ and a relative humidity range of 10% -90%, the wear-resistant test under complex conditions is realized, and the wear-resistant performance under the fully simulated use environment is completed in a quick test; the method effectively prevents the moving mechanical parts from being easily corroded and damaged or damaging the moving state when being exposed to the high-temperature and high-humidity environment, influences the test result and reduces the service life of equipment. The friction tests under the high-temperature and low-temperature high-humidity environments can realize the operation of about 600m m of the maximum single stroke and meet the requirements of the service environment and the operation stroke of the automobile glass lifter or most of mechanical parts.
Drawings
FIG. 1 is a schematic diagram of a prior art apparatus;
FIG. 2 is a schematic structural view of a constant temperature and humidity environment abrasion-resistant test box according to the invention;
FIG. 3 is a schematic diagram of an embodiment of the present invention;
Fig. 4 is a schematic view of a wear-resistant partial structure according to an embodiment of the present invention.
Description of the reference signs
1: Box body
2: Motor fixing support
3: Motor with a motor housing
4: Electrical appliance control box
5: Driving shaft
6: Coupling (built-in torque sensor)
7: Driving disc
8: Wafer of material to be measured
9: Round bar for material to be tested
10: Clamping arm
Detailed Description
The invention will be further described with reference to the accompanying drawings and examples
The main body of the invention is a constant temperature and humidity environment wear-resistant test box (shown in figures 2 and 3). A disc-shaped driving disc 7 with the diameter of 200mm is arranged in the box body 1, one of materials to be tested is processed into a disc-shaped disc body 8, and two screws with disc-shaped gaskets are fixed on the driving disc 7; the lower end of the driving disc 7 is fixed with the driving shaft 5, the driving shaft 5 extends out of the box body, a flange disc is arranged on the box body 1, and a sealing ring is arranged between the flange disc and the driving shaft 5 and used for fixing the driving shaft 5 and sealing. The lower part of the box body 1 is provided with a motor fixing bracket 2, a driving motor 3 is fixed on the box body 1, a motor shaft and a driving shaft 5 are kept in a coaxial state, the motor shaft and the driving shaft 5 are connected through a coupler 6, and a torque sensor is arranged in the coupler 6 and used for detecting a torque value from a driving disc.
One material to be tested is processed into a round bar-shaped material 9, one end of the round bar to be tested is processed into a sphere, the spherical end face or the plane is contacted with another material to be tested, the round bar-shaped material 9 is fixed at one end of a clamping arm 10, an end force applying mechanism of the clamping arm 10 in a control box is connected, a pressure sensor is used for adjusting the pressure value between the round bar-shaped material 9 and a wafer to meet the requirement through the display value of the sensor in the pressure of the force applying mechanism, the pressure between the round bar to be tested and the wafer to be tested is kept constant, and meanwhile, the relative vertical state between the spherical end face or the flat end face of the round bar-shaped material 9 and the wafer body material 8 is ensured (as shown in figure 4).
In another embodiment, a simple pressure application method is to place a weight on the round bar, and the pressure between the round bar-shaped material 9 and the wafer-shaped material 8 is kept constant by the gravity of the weight. The position of the round bar material 9 on the wafer material 8 is determined according to the stroke required for the test.
The clamping arm 10 adjusts the radius of the contact point of the round bar-shaped material 9 on the wafer body material 8 to be 60 to 100mm.
In the embodiment, the stroke of the sliding block of the automobile glass lifter product is 480mm, the round bar-shaped material 9 can be placed at the position with the radius of 80mm, and the single stroke can be completed by driving the disc to rotate for 0.95 circle.
In summary, the wear-resistant test equipment is used in combination with a constant temperature and humidity environment test box, different auxiliary agents, a small amount of mechanical components and partial sensing devices can be added to a friction surface and are arranged in the constant temperature and humidity environment test box, most of control electric appliance elements and main driving mechanical parts are arranged outside the constant temperature and humidity environment test box body, the constant temperature and humidity environment test box can provide a temperature range of-40 ℃ to 120 ℃ and a relative humidity range of 10% -90%, so that the wear-resistant test under the complex environment condition is realized, and the wear-resistant performance rapid test under the use environment is completely simulated; the method effectively prevents the moving mechanical parts from being easily corroded and damaged or damaging the moving state when being exposed to the high-temperature and high-humidity environment, influences the test result and reduces the service life of equipment. The friction tests under the high-temperature and low-temperature high-humidity environments can realize the maximum single-stroke running distance of about 600m m, and meet the requirements of the use environment and running stroke of the automobile glass lifter or most mechanical parts.
Claims (2)
1. The constant temperature and humidity environment wear-resistant test box is characterized by comprising a box body (1), a driving motor (3) outside the box body (1), a driving motor (3) fixing bracket (2) and an electric appliance control box (4);
The box body (1) is a sealed constant temperature and constant humidity environment with the temperature range of-40 ℃ to 120 ℃ and the relative humidity range of 10 percent to 90 percent;
The box body (1) is internally provided with a driving shaft (5), the upper part of the driving shaft is connected with a driving disc (7), the lower end of the driving shaft (5) is fixedly connected with a coupler (6) extending out of the box body (1), and the other end of the coupler (6) is fixedly connected with a driving motor (3);
a clamping arm (10) penetrating through the electric appliance control box (4) and the box body (1) and used for fixing a material to be tested is arranged;
The material to be tested comprises a round bar-shaped material (9) processed by the material to be tested and a wafer-shaped material (8) processed by the material to be tested;
wherein,
The disc body material (8) is fixedly connected with a disc-shaped driving disc (7) through two bolts with disc-shaped gaskets;
One end of the clamping arm (10) is fixedly connected with the round bar-shaped material (9), and the other end of the clamping arm extends out of the box body (1) and is connected with a stress application mechanism in the control box, so that the pressure between the round bar-shaped material (9) and the wafer body material (8) is kept constant;
the spherical or flat end surface of the round bar-shaped material (9) is in relatively vertical contact with the wafer body material (8);
A torque sensor for detecting a torque value from the driving disc (7) is arranged in the coupler (6); the stress application mechanism comprises a pressure sensor for displaying data;
The friction surface position where the spherical or flat end surface of the round bar-shaped material (9) and the wafer body material (8) are in relatively vertical contact is provided with an auxiliary agent;
The stress application mechanism is a weight and acts on the round bar-shaped material (9) to keep the pressure between the round bar-shaped material (9) and the wafer body material (8) constant.
2. A constant temperature and humidity environment wear test cell in accordance with claim 1 wherein the clamping arm (10) adjusts the radius of the contact point of the round bar material (9) on the wafer body material (8) to be in the range of 30 to 100mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810129284.2A CN108593473B (en) | 2018-02-08 | 2018-02-08 | Constant temperature and humidity environment wear-resisting test box |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810129284.2A CN108593473B (en) | 2018-02-08 | 2018-02-08 | Constant temperature and humidity environment wear-resisting test box |
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| Publication Number | Publication Date |
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| CN108593473A CN108593473A (en) | 2018-09-28 |
| CN108593473B true CN108593473B (en) | 2024-05-31 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109520875A (en) * | 2018-11-20 | 2019-03-26 | 中国航发贵州黎阳航空动力有限公司 | Turbine rotor blade integral shroud overlay cladding wear resistance at elevated temperature detection method |
| CN110375996A (en) * | 2019-09-02 | 2019-10-25 | 湖南行必达网联科技有限公司 | Glass-frame riser experimental rig and vehicle test system |
| CN112611708B (en) * | 2020-12-18 | 2025-11-18 | 北京理工大学 | A friction experimental apparatus with controllable ambient temperature and humidity. |
| CN113702227A (en) * | 2021-08-27 | 2021-11-26 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Cable scraping and grinding test platform |
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