CN107860668B - Coating impact fatigue experimental device - Google Patents
Coating impact fatigue experimental device Download PDFInfo
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- CN107860668B CN107860668B CN201711071060.2A CN201711071060A CN107860668B CN 107860668 B CN107860668 B CN 107860668B CN 201711071060 A CN201711071060 A CN 201711071060A CN 107860668 B CN107860668 B CN 107860668B
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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
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/34—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by mechanical means, e.g. hammer blows
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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
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to a coating impact fatigue test device, which comprises a base and is characterized in that: a rotation driving device and a lever are installed on the base, an output shaft of the rotation driving device is connected with a turntable, and a plurality of shifting forks are arranged on the turntable; a weight is installed at the right end of the lever, a screw rod and a sleeve nut are connected to the lever at the lower part of the weight, a hard alloy ball is arranged at the bottom of the sleeve nut, and a coating sample block clamp is arranged below the hard alloy ball; an upper wedge block is arranged in the middle of the lever, and the inclined plane at the lower end of the upper wedge block is matched with the inclined plane at the upper end of the lower wedge block; an electromagnet is arranged on the right side of the lower wedge block, and attracts the lower wedge block to move rightwards when the electromagnet is electrified; an upper infrared inductive switch and a lower infrared inductive switch are arranged on a base at the right end of the lever; the guide rod is arranged on the base and is in sliding fit with the lower wedge block, and the elastic part is connected between the guide rod bracket and the lower wedge block. The invention has simple structure and convenient use, and can realize the impact fatigue performance test of the coating sample.
Description
Technical Field
The invention relates to an experimental device for fatigue performance, in particular to a coating impact fatigue experimental device.
background
The coated mechanical parts are subjected to common damages such as abrasion and corrosion in the service process and are also subjected to impact action of different energies. The failure of the coating is further accelerated when the coating is subjected to a combination of wear and/or corrosion. Therefore, it is necessary to evaluate the impact fatigue resistance of the coating, especially the impact failure process of the coating under different temperatures or corrosive media. The patent 'a falling ball experimental apparatus capable of automatically controlling temperature' (201410776451.4) adopts a falling ball impact method to test the impact fatigue resistance of the coating, and the apparatus utilizes the kinetic energy generated by the falling of a steel ball from a certain height to impact a coating sample block. To realize impact with different energies, the falling height of the steel ball needs to be changed, the corresponding height of the workbench and the length of the guide pipe need to be changed, and the operation is inconvenient. Due to the limitation of the height of the experimental device, it is difficult to realize impact with large energy. In addition, because the inner diameter of the ball falling guide pipe is larger than the diameter of the steel ball, when the steel ball flies out from the guide pipe opening and impacts on the coating sample block, the steel ball is difficult to impact at the same position, and therefore the evaluation of the impact fatigue resistance of the coating is influenced. Therefore, it is necessary to design a simpler and more reliable coating impact fatigue experimental device to realize accurate impact on the same position of the coating, so as to obtain the impact fatigue resistance of the coating.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a coating impact fatigue experimental device which is simple in structure, convenient to use, reliable in action and capable of realizing the impact fatigue performance test of a coating sample.
According to the technical scheme provided by the invention, the coating impact fatigue experimental device comprises a base and is characterized in that: a rotating shaft support is arranged on the base, a supporting lever is rotatably arranged on the rotating shaft support, a rotation driving device is arranged on the base at the left end of the lever, a power output shaft of the rotation driving device is connected with a rotating disc, a plurality of shifting forks are circumferentially arranged on the rotating disc, and the shifting forks are driven to be sequentially contacted with the left end of the lever in the rotating process of the rotating disc; a weight is installed at the right end of the lever, a screw rod is connected to the lever positioned at the lower part of the weight, the lower end of the screw rod is connected with a sleeve nut, and a hard alloy ball is fixed at the bottom of the sleeve nut through the sleeve nut; a coating sample block clamp for installing a coating sample is arranged on the base below the hard alloy ball; an upper wedge block is arranged at the lower end of the middle part of the lever, a lower wedge block is arranged on a base below the upper wedge block, and an inclined plane at the lower end of the upper wedge block is matched with an inclined plane at the upper end of the lower wedge block; an electromagnet is arranged on the right side of the lower wedge-shaped block, the electromagnet attracts the lower wedge-shaped block to move towards the right side when being electrified, and the electromagnet is connected with a master controller through an electromagnet control line; a switch bracket is arranged on a base at the right end of the lever, an upper infrared induction switch and a lower infrared induction switch are arranged on the switch bracket, and the upper infrared induction switch and the lower infrared induction switch are respectively connected with a master controller and used for controlling the on-off of the electromagnet; the right end of the lever is contacted with the upper infrared induction switch when swinging to the uppermost end, and is contacted with the lower infrared induction switch when swinging to the lowermost end;
A guide rod bracket is arranged on the base, a guide rod is arranged on the guide rod bracket along the left-right direction, and the lower wedge block slides left and right along the guide rod; an elastic member is connected between the guide rod bracket and the lower wedge block.
Furthermore, a limiting stop lever is arranged at the left end of the guide rod.
Further, the elastic element is a spring.
Furthermore, the rotation driving device adopts a speed regulating motor.
Furthermore, the speed regulating motor is connected with the master controller through a speed regulating motor control line.
furthermore, a lever is supported on the rotating shaft bracket through the rotating shaft and is used as a fulcrum of the lever.
Furthermore, the number of the shifting forks is 4.
Furthermore, the weight is fixed at the right end of the lever through a weight locking nut.
Furthermore, the hard alloy ball is fixed on the screw rod through a sleeve nut, and the sleeve nut is fastened at the lower end of the screw rod through a locking nut, so that the sleeve nut is prevented from loosening in the impact process.
Further, the coating sample is placed in a cartridge capable of injecting a medium, and a thermocouple for measuring temperature is embedded inside the coating sample.
The invention has the following advantages:
(1) The coating impact fatigue test device is simple in structure and convenient to use;
(2) The impact fatigue performance test of the coating sample under the working conditions of normal temperature, low temperature, high temperature and corrosion can be realized;
(3) The accurate impact of the same position of the coating sample according to a certain frequency can be realized, and the secondary impact caused by rebound can be avoided;
(4) The impact fatigue performance test of the coating at different energies can be realized by changing the mass of the weight.
Drawings
FIG. 1 is a schematic structural diagram of the coating impact fatigue test device of the present invention.
Fig. 2 is a schematic structural diagram of the rebound prevention secondary impact device.
Fig. 3 is a schematic view of a manner of fixing a cemented carbide ball.
Description of reference numerals: 1-base, 2-shifting fork, 3-rotary table, 4-lever, 5-speed regulating motor, 6-rotary shaft, 7-rotary shaft support, 8-guide rod support, 9-guide rod, 10-limit stop rod, 11-spring, 12-lower wedge block, 13-upper wedge block, 14-electromagnet, 15-electromagnet control line, 16-coating sample block clamp, 17-weight, 18-weight locking nut, 19-hard alloy ball, 20-sleeve nut, 21-coating sample, 22-thermocouple, 23-locking nut, 24-screw, 25-box, 26-speed regulating motor control line, 27-lower infrared induction switch, 28-upper infrared induction switch, 29-switch bracket and 30-master controller.
Detailed Description
the invention is further described below with reference to the accompanying drawings.
As shown in fig. 1-3, the coating impact fatigue test device comprises a base 1, a rotating shaft support 7 is installed on the base 1, a rotating shaft 6 on the rotating shaft support 7 supports a lever 4, a speed regulating motor 5 is installed on the base 1 at the left end of the lever 4, a power output shaft of the speed regulating motor 5 is connected with a turntable 3, 4 shifting forks 2 are arranged on the turntable 3 along the circumferential direction, and the 4 shifting forks 2 can sequentially press down the left end of the lever for a distance in the rotating process of the turntable 3 and are separated from the lever, so that the right end of the lever rises and freely falls, and repeated impact of a hard alloy ball fixed below the right end of the lever on a coating sample block is realized; the right end of the lever 4 fixes the weight 17 through a weight locking nut 18, the lever 4 positioned at the lower part of the weight 17 is connected with a screw rod 24, and the lower end of the screw rod 24 fixes a hard alloy ball 19 at the bottom of the screw rod 24 through a sleeve nut 20; and the fixed sleeve nut is further locked by the locking nut 23; installing a coating sample block clamp 16 on the base 1 below the hard alloy ball 19, arranging a coating sample 21 on the coating sample block clamp 16, wherein the coating sample 21 can be placed in a box 25, corresponding media can be injected into the box 25 to realize the test of the coating sample 21 under low-temperature, normal-temperature, high-temperature or corrosive media, and a thermocouple 22 for measuring temperature is embedded in the coating sample 21; an upper wedge block 13 is arranged at the lower end of the middle part of the lever 4, the inclined plane at the lower end of the upper wedge block 13 is matched with the inclined plane at the upper end of a lower wedge block 12, and the lower wedge block 12 is arranged on the base 1; an electromagnet 14 is arranged on the right side of the lower wedge block 12, the electromagnet 14 can attract the lower wedge block 12 to move towards the right side under the condition of electrifying, and the electromagnet 14 is connected with a master controller 30 through an electromagnet control line 15; a switch bracket 29 is arranged on the base 1 at the right end of the lever 4, an upper infrared induction switch 28 and a lower infrared induction switch 27 are arranged on the switch bracket 29, and the upper infrared induction switch 28 and the lower infrared induction switch 28 are respectively connected with a master controller 30 and used for controlling the on-off of the electromagnet 14; the right end of the lever 4 contacts with the upper infrared inductive switch 28 when swinging to the uppermost end, and contacts with the lower infrared inductive switch 27 when swinging to the lowermost end.
A guide rod bracket 8 is arranged on the base 1, a guide rod 9 is arranged on the guide rod bracket 8 along the left-right direction, and the guide rod 9 is in sliding fit with the lower wedge block 12 and is used for guiding the lower wedge block 12; a spring 11 is connected between the guide rod support 8 and the lower wedge-shaped block 12, the spring 11 is used for resetting the lower wedge-shaped block 12, and a limiting stop rod 10 is arranged on the guide rod 9 and used for supporting the lever 4 after the lower wedge-shaped block 12 is reset, so that the right end part of the steel pipe is prevented from falling freely after being rebounded due to impact and driving the hard alloy ball 19 to cause secondary impact on the coating sample 21.
The speed regulating motor 5 is connected with a master controller 30 through a speed regulating motor control line 26, and the master controller 30 controls the rotating speed of the speed regulating motor 5.
The working process of the coating impact fatigue experimental device comprises the following steps: four shifting forks 2 on the rotary table 3 are driven by the speed regulating motor 5 to rotate, and when the shifting forks 2 rotate clockwise and press down the tail ends of power arms of a lever 4 arranged on a rotating shaft bracket 7, the right end (resistance arm) of the lever 4 rises. When the shifting fork 2 continues to rotate and is separated from the left end of the lever 4 (the right end of the lever 4 rises to the highest point), the touch plate at the right end of the lever 4 touches the upper infrared induction switch 28 to electrify the electromagnet 14, and attracts the lower wedge block 12 to move rightwards rapidly, so that the right end of the lever 4 does free falling motion under the action of the gravity of the weight 17 to drive the hard alloy ball 19 below the lever to impact the surface of the coating sample 21. When the hard alloy ball 19 impacts the surface of the coating sample 21, the right end of the lever 4 is at the lowest position, the plate at the rightmost end of the lever contacts the lower infrared induction switch 27 to power off the electromagnet 14, and the lower wedge block 12 which is not attracted by the electromagnet 14 rapidly moves leftwards to the position of the limit stop lever 10 under the action of the tensile force of the spring 11 to support the lever 4, so that secondary impact of the hard alloy ball 19 caused by rebound is avoided. When the speed regulating motor 5 drives the second shifting fork 2 on the rotary disc 3 to press down the leftmost end of the lever 4, the first action is repeated, the hard alloy ball 19 impacts the coating sample 21 again, and the same position can be impacted and guided. Wherein, every round of buncher 5, coating sample 21 receives the striking of quartic, consequently, can set for the impact number of times that coating sample 21 received through setting up buncher 5's total revolution, accomplishes the impact fatigue experiment of setting for the number of times automatically. In addition, the entire coating sample 21 can be placed in the box 25, and therefore, liquid nitrogen can be injected into the box 25 to realize low-temperature impact; the oil or other corrosive liquid media can be placed in the box 25, the liquid media in the box 25 is heated by electrifying, the heated media can heat the coating sample 21 and can also corrode the coating, and the impact fatigue performance test of the coating sample 21 under the simultaneous action of the thermal state or the corrosive media can be realized. Wherein the temperature of the coating sample 21 is controlled by a thermocouple embedded inside the coating sample 21 and controlled by a temperature controller.
Claims (10)
1. The utility model provides a coating impact fatigue experimental apparatus, includes base (1), characterized by: a rotating shaft support (7) is installed on the base (1), a lever (4) is rotatably supported on the rotating shaft support (7), a rotation driving device is installed on the base (1) at the left end of the lever (4), a power output shaft of the rotation driving device is connected with a rotating disc (3), a plurality of shifting forks (2) are circumferentially arranged on the rotating disc (3), and the shifting forks (2) are driven to sequentially contact with the left end of the lever (4) in the rotating process of the rotating disc (3); a weight (17) is arranged at the right end of the lever (4), a screw rod (24) is connected to the lever (4) positioned at the lower part of the weight (17), the lower end of the screw rod (24) is connected with a sleeve nut (20), and a hard alloy ball (19) is fixed at the bottom of the sleeve nut (20) by the sleeve nut; a coating sample block clamp (16) for installing a coating sample (21) is arranged on the base (1) below the hard alloy ball (19); an upper wedge block (13) is arranged at the lower end of the middle part of the lever (4), a lower wedge block (12) is arranged on the base (1) below the upper wedge block (13), and an inclined plane at the lower end of the upper wedge block (13) is matched with an inclined plane at the upper end of the lower wedge block (12); an electromagnet (14) is arranged on the right side of the lower wedge block (12), the electromagnet (14) attracts the lower wedge block (12) to move towards the right side when being electrified, and the electromagnet (14) is connected with a master controller (30) through an electromagnet control line (15); a switch bracket (29) is arranged on the base (1) at the right end of the lever (4), an upper infrared induction switch (28) and a lower infrared induction switch (27) are arranged on the switch bracket (29), and the upper infrared induction switch (28) and the lower infrared induction switch (27) are respectively connected with a master controller (30) and used for controlling the on-off of the electromagnet (14); the right end of the lever (4) is in contact with the upper infrared induction switch (28) when swinging to the uppermost end, and is in contact with the lower infrared induction switch (27) when swinging to the lowermost end;
A guide rod bracket (8) is arranged on the base (1), a guide rod (9) is arranged on the guide rod bracket (8) along the left-right direction, and the lower wedge block (12) slides left and right along the guide rod (9); an elastic part is connected between the guide rod bracket (8) and the lower wedge block (12).
2. The coating impact fatigue test apparatus of claim 1, wherein: and a limiting stop lever (10) is arranged at the left end of the guide rod (9).
3. The coating impact fatigue test apparatus of claim 1, wherein: the elastic piece adopts a spring (11).
4. The coating impact fatigue test apparatus of claim 1, wherein: the rotation driving device adopts a speed regulating motor (5).
5. The coating impact fatigue test apparatus of claim 4, wherein: the speed regulating motor (5) is connected with a master controller (30) through a speed regulating motor control line (26).
6. The coating impact fatigue test apparatus of claim 1, wherein: the rotating shaft bracket (7) supports the lever (4) through the rotating shaft (6) and is used as a fulcrum of the lever (4).
7. The coating impact fatigue test apparatus of claim 1, wherein: the number of the shifting forks (2) is 4.
8. The coating impact fatigue test apparatus of claim 1, wherein: the weight (17) is fixedly arranged at the right end of the lever (4) through a weight locking nut (18).
9. The coating impact fatigue test apparatus of claim 1, wherein: the hard alloy ball is fixed on the screw rod (24) through a sleeve nut (20), and the sleeve nut (20) is fastened at the lower end of the screw rod (24) through a locking nut (23).
10. The coating impact fatigue test apparatus of claim 1, wherein: the coating sample (21) is placed in a cartridge (25) capable of being filled with a medium, and a thermocouple (22) for measuring temperature is embedded inside the coating sample (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711071060.2A CN107860668B (en) | 2017-11-03 | 2017-11-03 | Coating impact fatigue experimental device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711071060.2A CN107860668B (en) | 2017-11-03 | 2017-11-03 | Coating impact fatigue experimental device |
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| CN107860668A CN107860668A (en) | 2018-03-30 |
| CN107860668B true CN107860668B (en) | 2019-12-10 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109459379A (en) * | 2018-12-24 | 2019-03-12 | 中国包装科研测试中心 | A kind of aluminum cream inner tube coating device for detecting performance and method |
| CN109813651B (en) * | 2019-03-21 | 2023-09-26 | 无锡市福莱达石油机械有限公司 | Experimental machine for testing impact fatigue performance of coating |
| CN110608960A (en) * | 2019-09-05 | 2019-12-24 | 北京金辰西维科安全印务有限公司 | Testing device and testing method |
| CN112697576B (en) * | 2020-12-31 | 2022-05-03 | 华南理工大学 | Material surface cyclic impact fatigue test device and test method |
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| SU842470A1 (en) * | 1979-03-21 | 1981-06-30 | Всесоюзный Научно-Исследовательскийинститут По Строительству Магист-Ральных Трубопроводов | Device for testing materials for impact strength |
| ES8505786A1 (en) * | 1983-05-09 | 1985-06-16 | Usinor | Method and apparatus for determining the quality of a sheet of steel, either coated or not. |
| CN204666490U (en) * | 2015-06-11 | 2015-09-23 | 中国人民解放军装甲兵工程学院 | A kind of spring percussion mechanism measuring anchoring strength of coating |
| CN105444975A (en) * | 2016-01-05 | 2016-03-30 | 哈尔滨工业大学 | Multifunctional drop hammer impact test device |
| CN105865961A (en) * | 2015-01-22 | 2016-08-17 | 中国农业机械化科学研究院 | Test apparatus for thermal shock life evaluation of thermal barrier coating |
| CN106442194A (en) * | 2016-11-02 | 2017-02-22 | 湘潭大学 | Coating failure testing device considering mechanical-heat-impact cyclic load effect |
| CN206177741U (en) * | 2016-11-02 | 2017-05-17 | 湘潭大学 | Consider coating failure test device of machinery - thermal shock cyclic loading effect |
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2017
- 2017-11-03 CN CN201711071060.2A patent/CN107860668B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU842470A1 (en) * | 1979-03-21 | 1981-06-30 | Всесоюзный Научно-Исследовательскийинститут По Строительству Магист-Ральных Трубопроводов | Device for testing materials for impact strength |
| ES8505786A1 (en) * | 1983-05-09 | 1985-06-16 | Usinor | Method and apparatus for determining the quality of a sheet of steel, either coated or not. |
| CN105865961A (en) * | 2015-01-22 | 2016-08-17 | 中国农业机械化科学研究院 | Test apparatus for thermal shock life evaluation of thermal barrier coating |
| CN204666490U (en) * | 2015-06-11 | 2015-09-23 | 中国人民解放军装甲兵工程学院 | A kind of spring percussion mechanism measuring anchoring strength of coating |
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| CN206177741U (en) * | 2016-11-02 | 2017-05-17 | 湘潭大学 | Consider coating failure test device of machinery - thermal shock cyclic loading effect |
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