A shaft material wear resistance testing machine

Abstract

The present invention relates to a wear-resistant testing machine for shaft materials, comprising a test bench, a rotating shaft arranged on the test bench, a driving mechanism for driving the rotating shaft to rotate back and forth, and a connector, a movable test block, and a fixed test block arranged in sequence along the axial direction of the rotating shaft, wherein the connector is connected to the end of the rotating shaft, the fixed test block is fixedly arranged on the test bench, the movable test block is movably arranged between the connector and the fixed test block, and the movable test block is connected to a force-applying mechanism for applying a force to the movable test block in a radial direction, the fixed test block is provided with a mounting hole for passing the test shaft, and the mounting hole is arranged coaxially with the rotating shaft. The present invention applies loads to different parts of the shaft material respectively by cooperating with the movable test block and the fixed test block, thereby increasing the force-applying parts and contact area of ​​the shaft material and improving the reliability of the test results.

Description

Technical Field

[0001] The invention relates to the technical field of wear testing equipment, in particular to a wear-resistant testing machine for shaft materials. Background Art

[0002] During use, shaft components generally experience varying degrees of friction with their supporting components. Therefore, in order to extend the service life of shaft components, surface treatment is generally required to improve their wear resistance. Currently, surface coating technology is a commonly used surface treatment method. Generally, a layer of wear-resistant coating with high hardness is deposited on the surface of the part through electroplating, spraying, physical vapor deposition, and chemical vapor deposition. The wear resistance of these coatings is mainly evaluated through testing of their friction and wear performance. Among them, the friction coefficient and wear rate are the most important wear resistance performance indicators of the two phases of the coating, and can generally be obtained through testing using a friction and wear testing machine.

[0003] The invention patent with publication number CN104406873B discloses a friction and wear tester for coating shaft components. Its disadvantage is that the friction contact part of the tester only acts on one part of the shaft component, and the contact area between the two is small, which cannot truly simulate the actual working conditions. Summary of the Invention

[0004] The purpose of the present invention is to provide a wear-resistant testing machine for shaft materials, which increases the force-applying parts and contact area of ​​the shaft materials and improves the reliability of the test results.

[0005] The above-mentioned object of the present invention is achieved through the following technical solutions: A shaft material wear resistance testing machine, including a test bench, and also including a rotating shaft arranged on the test bench, a driving mechanism for driving the rotating shaft to rotate back and forth, and a connector, a movable test block and a fixed test block arranged in sequence along the axial direction of the rotating shaft, the connector is connected to the end of the rotating shaft, the fixed test block is fixedly arranged on the test bench, the movable test block is movably arranged between the connector and the fixed test block, and the movable test block is connected to a force-applying mechanism that applies a force to the movable test block in a radial direction, the fixed test block is provided with a mounting hole for passing the test shaft, the mounting hole is coaxially arranged with the rotating shaft, and at least a portion of the movable test block is in contact with the test shaft and applies pressure on the test shaft in a radial direction.

[0006] Preferably, the test bench is provided with a guide seat, and the movable test block is movably mounted on the guide seat.

[0007] Preferably, a through hole is provided on the movable test block, and the through hole and the mounting hole are coaxially arranged with the rotation axis.

[0008] Preferably, the connector is a coupling, which is connected between the rotating shaft and the test shaft.

[0009] Preferably, the driving mechanism includes an eccentric wheel, a motor for driving the eccentric wheel to rotate, a crank arranged on the rotating shaft, and a transmission arm connected between the eccentric wheel and the crank.

[0010] Preferably, the force applying mechanism includes a fixed seat, a force transmission rod movably arranged on the fixed seat, a connecting end arranged at one end of the force transmission rod, and a driving element arranged at the other end of the force transmission rod.

[0011] Preferably, the driving element includes a rotating seat, which is threadedly connected to the force transmission rod.

[0012] Preferably, a tension sensor is connected between the force transmission rod and the connecting end.

[0013] Preferably, the test bench is further provided with a displacement detection mechanism, and the displacement detection mechanism and the force application mechanism are respectively arranged at two opposite ends of the movable test block.

[0014] Preferably, the displacement detection mechanism includes a detection support seat fixed on the test bench, a pin with one end pressed against the movable test block, a pressure spring driving the pin to move toward the movable test block, and a displacement sensor arranged at the other end of the pin.

[0015] Beneficial effects of the present invention: The present invention applies loads to different parts of the shaft material by cooperating with the movable test block and the fixed test block, thereby increasing the force-applying parts and contact area of ​​the shaft material and improving the reliability of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of an embodiment of the present invention;

[0017] Figure 2 Schematic diagram of the structure of the driving mechanism in an embodiment of the present invention;

[0018] Figure 3 is a structural schematic diagram of a force-applying mechanism in an embodiment of the present invention;

[0019] Figure 4 is a structural schematic diagram of a displacement detection mechanism in an embodiment of the present invention;

[0020] In the figure: 1-test bench, 2-rotating shaft, 3-driving mechanism, 301-eccentric wheel, 302-motor, 303-crank, 304-transmission arm, 4-connector, 5-movable test block, 501-through hole, 6-fixed test block, 7-force-applying mechanism, 701-fixed seat, 702-force-applying transmission rod, 703-connecting end, 704-rotating seat, 705-spring, 706-tension sensor, 8-displacement detection mechanism, 801-detection support seat, 802-thimble, 803-top pressure spring, 804-displacement sensor, 9-guide seat, 10-test shaft. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below with reference to the accompanying drawings.

[0022] This specific embodiment is merely an explanation of the present invention and is not intended to limit the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed. However, as long as such modifications are within the scope of the claims of the present invention, they are protected by patent law.

[0023] Example: Figure 1-4 As shown, a shaft material wear tester includes a test bench 1, a rotating shaft 2 mounted on the test bench 1, a drive mechanism 3 for driving the rotating shaft 2 in forward and reverse rotation, and a connector 4, a movable test block 5, and a fixed test block 6 arranged in sequence along the axial direction of the rotating shaft 2. The rotating shaft 2 is horizontally mounted on the test bench 1 via a bearing seat. The connector 4 is connected to the end of the rotating shaft 2. The connector 4 is a coupling connected between the rotating shaft 2 and the test shaft 10 to ensure that the rotating shaft 2 and the test shaft 10 can rotate synchronously.

[0024] The fixed test block 6 is fixedly arranged on the test bench 1 . A mounting hole for passing the test shaft is provided on the fixed test block 6 . The mounting hole is coaxially arranged with the rotating shaft 2 .

[0025] The movable test block 5 is movably disposed between the connector 4 and the fixed test block 6. A force-applying mechanism 7 is connected to the movable test block 5 to apply radial force to the movable test block 5. At least a portion of the movable test block 5 contacts the test shaft and applies radial pressure thereon. In this embodiment, a through hole 501 is provided in the movable test block 5. The through hole 501 and the mounting hole are coaxially arranged with the rotating shaft 2.

[0026] A guide seat 9 is provided on the test bench 1 , and the movable test block 5 is movably mounted on the guide seat 9 .

[0027] The fixed test block 6 and the movable test block 5 are made of the same material, such as titanium alloy.

[0028] like Figure 2As shown, the driving mechanism 3 includes an eccentric wheel 301, a motor 302 for driving the eccentric wheel 301 to rotate, a crank 303 provided on the rotating shaft 2, and a transmission arm 304 connected between the eccentric wheel 301 and the crank 303. The motor 302 is installed below the rotating shaft 2, and the eccentric wheel 301 is installed on the output shaft of the motor 302. One end of the transmission arm 304 is hinged at the eccentric position of the eccentric wheel 301, and the other end is hinged on the crank 303. When the eccentric wheel 301 rotates, the crank 303 swings forward and backward through the rotation of the transmission arm 304, thereby driving the rotating shaft 2 to rotate forward or reverse. The reciprocating forward or reverse rotation of the rotating shaft 2 causes continuous friction to be generated at the contact parts of the test shaft 10 with the movable test block 5 and the fixed test block 6.

[0029] The transmission arm 304 may be a telescopic structure. By adjusting the length of the transmission arm 304 , the swing amplitude of the crank 303 can be adjusted, thereby adjusting the forward and reverse rotation angles of the rotating shaft 2 .

[0030] like Figure 3 As shown, the force-applying mechanism 7 includes a fixed seat 701, a force transmission rod 702 movably arranged on the fixed seat 701, a connecting end 703 arranged at one end of the force transmission rod 702, and a driving element arranged at the other end of the force transmission rod 702. The driving element is used to pull or push the force transmission rod 702 to move axially, so that the movable test block 5 generates radial tension or pressure on the test shaft 10.

[0031] The driving element can be a hydraulic cylinder. In this embodiment, the driving element includes a rotating base 704, which is threadedly connected to the force transmission rod 702. A spring 705 is installed between the rotating base 704 and the fixed base 701. Rotating the rotating base 704 generates axial tension on the force transmission rod 702. A tension sensor is connected between the force transmission rod 702 and the connecting end 703.

[0032] The test bench 1 is further provided with a displacement detection mechanism 8 , which is located at opposite ends of the movable test block 5 along with the force-applying mechanism 7 .

[0033] like Figure 4 As shown, the displacement detection mechanism 8 includes a detection support seat 801 fixed on the test bench 1, a pin 802 with one end pressed against the movable test block 5, a pressure spring 803 driving the pin 802 to move toward the movable test block 5, and a displacement sensor 804 arranged at the other end of the pin 802. The displacement sensor 804 adopts an existing laser displacement sensor.

[0034] At the beginning of the test, the test shaft 10 is first passed through the mounting hole of the fixed test block 6 and the through hole 501 of the movable test block 5. Then, the coupling is connected between the rotating shaft 2 and the test shaft 10, so that the test shaft 10 is coaxially arranged and fixedly connected. After installation, the force-applying mechanism 7 pulls the movable test block 5 to the right, so that the left inner wall of the through hole 501 of the movable test block 5 is tightly pressed against the right side of the test shaft 10, thereby causing the movable test block 5 to generate a rightward force on the test shaft 10. Since the position of the fixed test block 6 is fixed, the right inner wall of the mounting hole of the fixed test block 6 is tightly pressed against the right side of the test shaft 10, causing the fixed test block 6 to generate a leftward force on the test shaft 10. The left and right forces are equal in magnitude and opposite in direction. At the same time, the ejector pin 802 of the displacement detection mechanism 8 presses against the end of the movable test block 5 to measure the initial position of the movable test block 5. Finally, the driving mechanism 3 operates, causing the rotating shaft 2 to drive the test shaft 10 to rotate forward and reverse. During this process, the contact parts of the test shaft 10 with the movable test block 5 and the fixed test block 6 are worn due to repeated friction, causing the movable test block 5 to deviate to the right. The ejector pin 802 then moves under the elastic force of the pressing spring 803, and the displacement sensor 804 detects the displacement data of the ejector pin 802, which is the amount of wear on the test shaft 10.

Claims

1. A shaft material wear tester, comprising a test bench (1), characterized in that: The test bench (1) further comprises a rotating shaft (2), a driving mechanism (3) for driving the rotating shaft (2) to rotate forward and backward, and a connector (4), a movable test block (5), and a fixed test block (6) sequentially arranged along the axial direction of the rotating shaft (2). The connector (4) is connected to the end of the rotating shaft (2). The fixed test block (6) is fixedly arranged on the test bench (1). The movable test block (5) is movably arranged between the connector (4) and the fixed test block (6). The movable test block (5) is connected to a force applying mechanism (7) for applying a force to the movable test block (5) in a radial direction. The fixed test block (6) is provided with a force applying mechanism (7) for applying a force to the movable test block (5) in a radial direction. The movable test block (5) is provided with a through hole (501), the through hole (501) and the mounting hole are coaxially arranged with the rotating shaft (2), and at least a portion of the movable test block (5) contacts the test shaft and applies pressure on the test shaft in a radial direction; the force-applying mechanism (7) includes a fixed seat (701), a force transmission rod (702) movably arranged on the fixed seat (701), a connecting end (703) arranged at one end of the force transmission rod (702), and a driving element arranged at the other end of the force transmission rod (702); the force transmission rod (702) is pulled or pushed by the driving element ) moves axially, causing the movable test block (5) to generate radial tension or pressure on the test shaft (10). The test shaft (10) passes through the fixed test block (6) and the movable test block (5), and rotates synchronously with the reciprocating forward or reverse rotation of the rotating shaft (2), so that friction is continuously generated at the contact parts of the test shaft (10) with the movable test block (5) and the fixed test block (6).

2. The shaft material wear-resistant testing machine according to claim 1, characterized in that: A guide seat (9) is provided on the test bench (1), and the movable test block (5) is movably mounted on the guide seat (9).

3. The shaft material wear resistance testing machine according to claim 1, characterized in that: The connector (4) is a coupling connected between the rotating shaft (2) and the test shaft.

4. The wear-resistant testing machine for shaft materials according to claim 1, characterized in that: The driving mechanism (3) comprises an eccentric wheel (301), a motor (302) for driving the eccentric wheel (301) to rotate, a crank (303) arranged on the rotating shaft (2), and a transmission arm (304) connected between the eccentric wheel (301) and the crank (303).

5. The wear-resistant testing machine for shaft materials according to claim 1, characterized in that: The driving element comprises a rotating seat (704), and the rotating seat (704) is threadedly connected to the force transmission rod (702).

6. The shaft material wear resistance testing machine according to claim 5, characterized in that: A tension sensor is connected between the force transmission rod (702) and the connecting end (703).

7. The shaft material wear resistance testing machine according to claim 1, characterized in that: The test bench (1) is also provided with a displacement detection mechanism (8), and the displacement detection mechanism (8) and the force application mechanism (7) are respectively arranged at two opposite ends of the movable test block (5).

8. The shaft material wear resistance testing machine according to claim 7, characterized in that: The displacement detection mechanism (8) comprises a detection support seat (801) fixed on the test bench (1), a pin (802) with one end pressed against the movable test block (5), a pressing spring (803) for driving the pin (802) to move toward the movable test block (5), and a displacement sensor (804) provided at the other end of the pin (802).

Images