Thermal friction wear test device

Abstract

The utility model provides a thermal friction wear test device which comprises a test bed, a linear guide rail, a heating furnace, a rotating motor, a telescopic mechanism and a cooling mechanism, the heating furnace is installed on the test bed through the linear guide rail, and the rotating motor and the telescopic mechanism are respectively located on two sides of the heating furnace. An output shaft of the rotating motor and the telescopic end of the telescopic mechanism are coaxially arranged and are both parallel to the linear guide rail. An output shaft of the rotating motor faces the heating furnace and is used for connecting a workpiece sample which is just positioned in the heating furnace; the telescopic end of the telescopic mechanism faces the heating furnace and is used for connecting a hot-working die sample; the hot-working die sample extends into the heating furnace and is in pressing contact with the workpiece sample; and the cooling mechanism is used for cooling the hot-working die sample. The testing device can be used for testing the cold and hot cycling wear function of the hot-working die; and the heating furnace is movable, so that the frictional wear state of the mold and the workpiece can be conveniently observed in multiple hot and cold cycles.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal friction and wear performance testing, in particular to a thermal friction and wear testing device. Background Art

[0002] Hot working dies mainly include hot forging dies, hot blanking dies, hot extrusion dies, and die-casting dies. When working, hot working dies are subjected to large impact loads, strong friction, thermal stress caused by severe hot and cold cycles, and high-temperature oxidation. They often fail in the form of deformation and collapse, fracture, thermal fatigue, thermal wear, and corrosion. Thermal wear refers to the complex wear process formed on the cavity surface under the combined action of mechanical loads and thermal loads. The wear of hot working dies is mainly surface fatigue wear, and due to different working conditions, it is often accompanied by adhesive wear and abrasive wear. The main damage characteristics of the worn surface are scratches, grooves, pitting, and peeling. Dies with violent relative motion and protruding parts (such as hot extrusion punches, etc.) are prone to thermal wear failure. Therefore, it is necessary to conduct thermal friction and wear tests on hot working dies. In the thermal friction and wear test, mechanical loads and thermal loads are applied to the hot working dies, and then the hot working dies are subjected to rotational friction to evaluate their thermal friction and wear performance.

[0003] Patent CN107328646A discloses a hot extrusion wear acceleration test method and a coating mold damage prediction test device. The test device includes a controller, a test bench, and a motor, telescopic mechanism, and heating furnace mounted on the test bench. The motor's output shaft and the telescopic end of the telescopic mechanism are connected to a workpiece sample and a hot working mold sample, respectively, via a clamp. This test device can detect the thermal friction and wear conditions of the hot working mold sample. However, this test device can only perform a single thermal friction and wear test and cannot simulate the hot working mold's hot and cold cycle working environment, making it difficult to evaluate the hot working mold's hot and cold cycle wear function. Furthermore, during the heating process, the heating furnace cannot be moved, making it impossible to observe the friction and wear conditions of the mold and workpiece. Utility Model Content

[0004] In response to the deficiencies in the prior art, the utility model provides a thermal friction and wear testing device, which can simulate the working environment of the hot working mold's hot and cold cycle on the basis of thermal load and mechanical load, thereby testing the hot and cold cycle wear function of the hot working mold; and the heating furnace is movable, which is convenient for observing the friction and wear status of the mold and the workpiece during multiple hot and cold cycles.

[0005] The technical solutions adopted to achieve the above-mentioned purpose of the utility model are:

[0006] A thermal friction and wear testing device comprises at least a test bench, and also includes a linear guide rail, a heating furnace, a rotating motor, a telescopic mechanism and a cooling mechanism arranged on the test bench, wherein the heating furnace is mounted on the test bench via the linear guide rail, the rotating motor and the telescopic mechanism are respectively located on both sides of the heating furnace, the output shaft of the rotating motor is coaxially arranged with the telescopic end of the telescopic mechanism and both are parallel to the linear guide rail; the output shaft of the rotating motor faces the heating furnace and is used to connect to a workpiece sample, and when the heating furnace moves to the workpiece sample, the workpiece sample is just located in the heating furnace; the telescopic end of the telescopic mechanism faces the heating furnace and is used to connect to a hot working mold sample, the telescopic end of the telescopic mechanism extends so that the hot working mold sample extends into the heating furnace and is in pressurized contact with the workpiece sample; the telescopic end of the telescopic mechanism retracts so that the hot working mold sample exits the heating furnace, and the cooling mechanism cools the hot working mold sample.

[0007] The telescopic mechanism is a hydraulic cylinder.

[0008] The output shaft of the rotating motor and the telescopic end of the telescopic mechanism are respectively used to be connected to the workpiece sample and the hot working mold sample through couplings.

[0009] The rotating motor is connected to a frequency converter, and the rotating direction and speed of the rotating motor are adjusted by the frequency converter.

[0010] The cooling mechanism comprises a universal adjustment nozzle installed on the test bench, and the universal adjustment nozzle is a bamboo tube serpentine structure.

[0011] The cooling mechanism further includes a circulating water tank. A water outlet is provided on the test bench below the universal adjustment nozzle, and the circulating water tank is installed below the water outlet on the test bench.

[0012] The telescopic end of the telescopic mechanism is connected to a first connecting rod through a coupling. The first connecting rod is used to connect the hot working mold specimen. The first connecting rod is connected to a sliding support rod. A slide rail is installed on the test bench. The sliding support rod is slidably connected to the slide rail. When the telescopic end of the telescopic mechanism is extended or retracted, the first connecting rod is driven to slide on the slide rail.

[0013] The output shaft of the rotating motor is connected to a second connecting rod through a coupling. The second connecting rod is used to connect the workpiece sample. A torque sensor is installed on the second connecting rod. The torque sensor is placed on the test bench.

[0014] The output shaft of the rotating motor is connected to a third connecting rod through a coupling. The third connecting rod is used to connect the workpiece sample. A fixed support rod is connected below the third connecting rod, and the fixed support rod is supported on the test bench.

[0015] The thermal friction and wear testing device also includes a control system, and the linear guide rail, heating furnace, rotating motor, telescopic mechanism and cooling mechanism are all connected to the control system. The control system controls the movement of the heating furnace, the temperature inside the heating furnace, the speed and rotation direction of the rotating motor, the stroke of the telescopic mechanism and the cooling time of the cooling mechanism.

[0016] Compared with the prior art, the technical solution provided by the present invention has the following advantages: (1) The thermal friction and wear testing device provided in the present invention includes a test bench, a linear guide rail, a heating furnace, a rotating motor, a telescopic mechanism and a cooling mechanism. The hot working mold sample connected to the telescopic end of the telescopic mechanism and the workpiece sample connected to the rotating shaft of the rotating motor are subjected to a thermal friction and wear test based on thermal load and mechanical load in the heating furnace. The hot working mold sample is cooled by the cooling mechanism to simulate the hot and cold cycle working environment of the hot working mold, thereby testing the hot and cold cycle wear function of the hot working mold.

[0017] (2) The heating furnace in the present invention is movable, which makes it easy to observe the friction and wear of the mold and the workpiece during multiple hot and cold cycles. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the thermal friction and wear testing device provided by the utility model;

[0019] Figure 2 This is a front view of the thermal friction and wear testing device provided by the utility model;

[0020] Figure 3 A top view of the thermal friction and wear testing device provided by the utility model;

[0021] Figure 4 It is a structural schematic diagram of the workpiece sample in the utility model;

[0022] Figure 5 This is a schematic structural diagram of a hot working mold sample in the present invention;

[0023] Figure 6 Schematic diagram of the thermal friction and wear test device provided by the utility model during testing

[0024] In the figure: 1-test bench, 2-linear guide, 3-heating furnace, 4-rotating motor, 5-workpiece sample, 501-center pin, 6-hydraulic cylinder, 7-hot working mold sample, 701-groove, 8-coupling, 9-universal adjustment nozzle, 10-circulating water tank, 11-first connecting rod, 12-sliding support rod, 13-slide rail, 14-second connecting rod, 15-torque sensor, 16-third connecting rod, 17-fixed support rod. DETAILED DESCRIPTION

[0025] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] The thermal friction and wear test device provided in this embodiment is as follows Figure 1-Figure 3 As shown, it at least includes a test bench 1, a linear guide rail 2, a heating furnace 3, a rotating motor 4, a telescopic mechanism, a cooling mechanism and a control system.

[0027] The heating furnace 3 is mounted on the test bench 1 via the linear guide 2. The linear guide 2 comprises a linear track, a transmission mechanism, a slider, and a drive motor. The linear guide 2 is conventional technology, and its structure and principle are not described in detail here. The linear guide 2 is fixedly mounted on the test bench 1, and the heating furnace 3 is fixed to the slider of the linear guide 2. The drive motor drives the slider to move along the linear track, thereby moving the heating furnace 3 along the linear guide 2. Specifically, the heating furnace 3 is a horizontal tubular furnace capable of high-temperature heating.

[0028] The rotary motor 4 and the telescopic mechanism are respectively located on either side of the heating furnace 3. The output shaft of the rotary motor 4 is coaxially arranged with the telescopic end of the telescopic mechanism and is parallel to the linear guide 2. The output shaft of the rotary motor 4 faces the heating furnace 3 and is used to connect to the workpiece sample 5. When the heating furnace 3 moves to the workpiece sample 5, the workpiece sample 5 is exactly located within the heating furnace 3. Specifically, the rotary motor 4 is connected to a frequency converter, which adjusts the rotation direction and speed of the rotary motor 4.

[0029] In this embodiment, the telescopic mechanism is a hydraulic cylinder 6, which is equipped with a hydraulic pipeline, a hydraulic station, a pressure regulating valve, and a hydraulic sensor. The hydraulic cylinder 6 is connected to the hydraulic station via the hydraulic pipeline, the pressure regulating valve is connected to the hydraulic pipeline, and the hydraulic sensor is installed on the hydraulic cylinder 6. The hydraulic station provides working pressure for the hydraulic cylinder 6, the hydraulic sensor monitors the working pressure in real time, and adjusts the working pressure via the pressure regulating valve. The telescopic end of the telescopic mechanism faces the heating furnace 3 and is used to connect to the hot working mold sample 7. The telescopic end of the telescopic mechanism extends to allow the hot working mold sample 7 to extend into the heating furnace 3 and come into close contact with the workpiece sample 5. The telescopic end of the telescopic mechanism retracts to allow the hot working mold sample 7 to exit the heating furnace 3, and the cooling mechanism cools the hot working mold sample 7.

[0030] Preferably, the workpiece sample 5 and the hot working die sample 7 are both cylindrical, and a center pin 501 is provided on the end surface of the workpiece sample 5 close to the heating furnace 3, and a groove 701 is provided on the end surface of the hot working die sample 7 close to the heating furnace 3 to cooperate with the center pin 501. Figure 4 and Figure 5 As shown, during the test, the center pin 501 is pressed tightly into the groove 701. Furthermore, the output shaft of the rotary motor 4 and the telescopic end of the telescopic mechanism are respectively connected to the workpiece sample 5 and the hot working die sample 7 through a coupling 8.

[0031] The cooling mechanism cools the hot working mold sample 7 by water cooling, air cooling, etc. In this embodiment, the cooling mechanism cools the hot working mold sample 7 by water cooling. Specifically, the cooling mechanism includes a universal adjustment nozzle 9 and a circulating water tank 10. The universal adjustment nozzle 9 is a bamboo tube serpentine structure, which is convenient for adjusting the direction at will. The universal adjustment nozzle 9 is installed on the test bench 1 and cools the hot working mold sample 7 by pumping water through a water pump. A water outlet is provided on the test bench 1 below the universal adjustment nozzle 9, and the circulating water tank 10 is installed below the water outlet on the test bench 1 to recycle cooling water.

[0032] In this embodiment, due to the arrangement of the cooling mechanism and the linear guide rail 2, the distance between the hot working mold specimen 7 and the workpiece specimen 5 is relatively large. When mechanical loads are applied to the two and friction and wear tests are performed, the reaction force on the rotating motor 4 and the telescopic mechanism is relatively large, which is not conducive to the long-term stable operation of the rotating motor 4 and the telescopic mechanism. Therefore, a first connecting rod 11 is connected to the telescopic end of the telescopic mechanism via a coupling 8. The first connecting rod 11 is used to connect to the hot working mold specimen 7. A sliding support rod 12 is connected to the first connecting rod 11. A slide rail 13 is installed on the test bench 1. The sliding support rod 12 is slidably connected to the slide rail 13. When the telescopic end of the telescopic mechanism is extended or retracted, it drives the first connecting rod 11 to slide on the slide rail 13. At this time, the sliding support rod 12 and the slide rail 13 can support the first connecting rod 11, thereby improving the stability of the telescopic mechanism. Furthermore, the output shaft of the rotary motor 4 is sequentially connected to a second connecting rod 14 and a third connecting rod 16 via a coupling 8. In this embodiment, the third connecting rod 16 is used to connect to the workpiece specimen 5. A torque sensor 15 is mounted on the second connecting rod 14. The torque sensor 15 is placed on the test bench 1 to monitor the load output torque in real time. The installation of the torque sensor 15 is optional. A fixed support rod 17 is connected below the third connecting rod 16. The fixed support rod 17 is supported on the test bench 1 to support the third connecting rod 16 and ensure the operating stability of the rotary motor 4.

[0033] In this embodiment, the linear guide 2, heating furnace 3, rotating motor 4, telescopic mechanism, and cooling mechanism are all connected to the control system. The control system controls the movement of the heating furnace 3, the temperature within the heating furnace 3, the speed and direction of the rotating motor 4, the travel of the telescopic mechanism, and the cooling time of the cooling mechanism. Specifically, the drive motor on the linear guide 2 is connected to the control system, which controls the displacement of the slider on the linear guide 2, thereby controlling the movement of the heating furnace 3. The heating furnace 3 is connected to the control system, which controls the heating temperature within the heating furnace 3. The frequency converter on the rotating motor 4 is connected to the control system, which controls the speed and direction of the rotating motor 4 and cooperates with the hydraulic cylinder 6. The telescopic mechanism is connected to the control system, which controls the travel of the hydraulic cylinder 6. Specifically, the control system's operating panel allows for setting parameters such as heating temperature, heating time, cooling time, and the number of cycles within these parameters as needed.

[0034] The working principle of the thermal friction and wear test device provided in this embodiment is as follows: before the test, the hydraulic cylinder 6 is in a contracted state, the workpiece sample 5 is located outside the heating furnace 3, and the workpiece sample 5 is located outside the heating furnace 3. Figure 1 When the test starts, the heating furnace 3 is controlled to move to the workpiece sample 5 so that the workpiece sample 5 is located in the heating furnace 3. At the same time, the hydraulic cylinder 6 is extended so that the hot working die sample 7 is extended into the heating furnace 3 and pressed into contact with the workpiece sample 5. The first thermal friction and wear test is started. Figure 6 As shown. After a period of testing, the rotating motor 4 is shut down, the hydraulic cylinder 6 is retracted, and the cooling mechanism cools the hot working mold specimen 7. The heating furnace 3 is then moved so that the workpiece specimen 5 is outside the furnace 3, and the wear state of the workpiece specimen 5 is observed. After a period of cooling, the above steps are repeated for a second thermal friction and wear test. The number of hot and cold cycles can be set as needed to test the hot working mold's hot and cold cycle wear function.

Claims

1. A thermal friction and wear testing device, comprising at least a test bench (1), characterized in that: The test bench (1) further comprises a linear guide rail (2), a heating furnace (3), a rotating motor (4), a telescopic mechanism and a cooling mechanism, wherein the heating furnace (3) is mounted on the test bench (1) via the linear guide rail (2), the rotating motor (4) and the telescopic mechanism are respectively located on both sides of the heating furnace (3), the output shaft of the rotating motor (4) is coaxially arranged with the telescopic end of the telescopic mechanism and both are parallel to the linear guide rail (2); the output shaft of the rotating motor (4) faces the heating furnace (3) and is used to connect to a workpiece sample (5), When the heating furnace (3) moves to the workpiece sample (5), the workpiece sample (5) is just located in the heating furnace (3); the telescopic end of the telescopic mechanism faces the heating furnace (3) and is used to connect the hot working mold sample (7); the telescopic end of the telescopic mechanism extends so that the hot working mold sample (7) extends into the heating furnace (3) and is in close contact with the workpiece sample (5); the telescopic end of the telescopic mechanism retracts so that the hot working mold sample (7) exits the heating furnace (3), and the cooling mechanism cools the hot working mold sample (7).

2. The thermal friction and wear testing device according to claim 1, characterized in that: The telescopic mechanism is a hydraulic cylinder (6).

3. The thermal friction and wear testing device according to claim 1, characterized in that: The output shaft of the rotating motor (4) and the telescopic end of the telescopic mechanism are respectively used to be connected to the workpiece sample (5) and the hot working die sample (7) through a coupling (8).

4. The thermal friction and wear testing device according to claim 1, characterized in that: The rotating motor (4) is connected to a frequency converter, and the rotating direction and rotating speed of the rotating motor (4) are adjusted by the frequency converter.

5. The thermal friction and wear testing device according to claim 1, characterized in that: The cooling mechanism comprises a universal adjustment nozzle (9) mounted on the test bench (1); the universal adjustment nozzle (9) is a bamboo tube serpentine structure.

6. The thermal friction and wear testing device according to claim 5, characterized in that: The cooling mechanism further comprises a circulating water tank (10), a water outlet is provided on the test bench (1) below the universal adjustment nozzle (9), and the circulating water tank (10) is installed below the water outlet on the test bench (1).

7. The thermal friction and wear testing device according to claim 1, characterized in that: The telescopic end of the telescopic mechanism is connected to a first connecting rod (11) via a coupling (8), the first connecting rod (11) is used to connect the hot working mold specimen (7), the first connecting rod (11) is connected to a sliding support rod (12), a slide rail (13) is installed on the test bench (1), the sliding support rod (12) is slidably connected to the slide rail (13), and when the telescopic end of the telescopic mechanism is extended or retracted, the first connecting rod (11) is driven to slide on the slide rail (13).

8. The thermal friction and wear testing device according to claim 1, characterized in that: The output shaft of the rotating motor (4) is connected to a second connecting rod (14) via a coupling (8), the second connecting rod (14) is used to connect to the workpiece sample (5), a torque sensor (15) is installed on the second connecting rod (14), and the torque sensor (15) is placed on the test bench (1).

9. The thermal friction and wear testing device according to claim 1, characterized in that: The output shaft of the rotating motor (4) is connected to a third connecting rod (16) via a coupling (8), and the third connecting rod (16) is used to connect the workpiece sample (5). A fixed support rod (17) is connected below the third connecting rod (16), and the fixed support rod (17) is supported on the test bench (1).

10. The thermal friction and wear testing device according to claim 1, characterized in that: The invention also includes a control system, wherein the linear guide rail (2), the heating furnace (3), the rotating motor (4), the telescopic mechanism and the cooling mechanism are all connected to the control system, and the movement of the heating furnace (3), the temperature inside the heating furnace (3), the speed and direction of rotation of the rotating motor (4), the stroke of the telescopic mechanism and the cooling time of the cooling mechanism are controlled by the control system.

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