Roller roughness retentivity testing machine with accompanying sample axial moving device

Abstract

The invention discloses a roller roughness retentivity testing machine with an accompanying sample axial moving device, which belongs to the technical field of material test, and comprises a base, a rotating mechanism for driving a sample to rotate, and a test force loading and unloading mechanism connected with the base through a bidirectional sliding seat and used for applying test force to different axial positions of the sample, the bidirectional sliding seat is connected with the base through a sliding table parallel to the length direction of the sample, the bidirectional sliding seat is connected with the sliding table through a guide rail perpendicular to the sliding table, and one end of a threaded rod in the sliding table extends to one side of the sliding table and is fixedly sleeved with an upper disc; the driving mechanism is detachably connected with the upper disc and is used for driving the upper disc to swing back and forth. Through the arranged driving mechanism, when the device is used for driving the sample to rotate, the upper disc swings back and forth, so that the accompanying sample further moves back and forth within a certain range.

Description

Technical Field

[0001] The invention belongs to the technical field of material testing, in particular to the technical field of roller roughness testing, and specifically to a roller roughness retention testing machine with an axial moving device for accompanying a sample. Background Art

[0002] During the rolling process, the cold rolling work rolls, on the one hand, cause plastic deformation of the rolled material, and on the other hand, imprint their own surface morphology on the surface of the rolled material. As the rolling distance increases, the roughness of the roll surface gradually decreases, which, on the one hand, will lead to a decrease in the friction coefficient, resulting in accidents such as slipping and steel jamming, causing accidental abnormal damage to the roll; on the other hand, the change in the surface roughness of the rolled material will cause an increase in the defective product rate. Therefore, a trend in the development of cold rolling rolls is to require that the roughness can be maintained for a long time and at a high level within a long rolling distance, and the methods and equipment for evaluating the roughness retention ability are becoming more and more valued by people.

[0003] In the patent document with the announcement number CN111157377B, a roll roughness retention testing machine is provided, including a base, a roll sample rotating device, a test force loading and unloading device for applying test force to different axial positions of the sample, and a test force torque speed measurement and control system.

[0004] However, in the process of use of the above-mentioned patent document, the bidirectional slide is moved so that the accompanying specimen can be subjected to sliding friction and wear at different axial positions of the specimen. However, the position of the accompanying specimen is fixed during the test. Since the accompanying specimen is soft in hardness and poor in wear resistance, after being worn to a certain extent, the wear marks on the outer circle of the specimen itself during the grinding process will be copied to the accompanying specimen, and the gap between the two will gradually decrease, causing the high and low points of the surface contour of the specimen to be frictionally worn at the same time, which is inconsistent with the disordered random surface morphology of the rolled material in actual rolling, and will cause the surface roughness of the specimen to decrease slowly; as the accompanying specimen is further worn, the gap between the accompanying specimen and the specimen is bridged, adhesive wear will occur, resulting in an abnormal increase in the surface roughness of the specimen, causing the test to fail. Summary of the invention

[0005] In order to solve the problem in the prior art that a roller roughness retention testing machine may cause experimental failure when used for a long time, the present invention provides a roller roughness retention testing machine with an axial moving device for a companion sample, which can move the companion sample back and forth along a rotating sample when performing a roughness test on the roller, thereby making the companion sample evenly worn and preventing experimental failure.

[0006] The technical solution adopted by the roller roughness retention testing machine with a sample axial moving device of the present invention is:

[0007] A roller roughness retention testing machine with an axial movement device for a sample comprises a base, a rotating mechanism for driving the sample to rotate, and a test force loading and unloading mechanism connected to the base via a bidirectional slide and used to apply test forces to different axial positions of the sample. The bidirectional slide is connected to the base via a slide parallel to the length direction of the sample, the bidirectional slide is connected to the slide via a guide rail perpendicular to the slide, and one end of a threaded rod in the slide extends to one side of the slide and is fixedly sleeved with an upper disc; it also includes a driving mechanism detachably connected to the upper disc and used to drive the upper disc to swing back and forth.

[0008] A further improvement of the technical solution of the present invention is that the driving mechanism includes a driving motor located below the base, and the output shaft fixing sleeve of the driving motor is provided with a lower disc connected to the upper disc through a connecting rod and having a smaller diameter than the upper disc.

[0009] A further improvement of the above technical solution of the present invention is that the output shaft of the driving motor is connected to the lower disc through a reducer, and the driving motor is installed on the ground through a motor base.

[0010] A further improvement of the above technical solution of the present invention is that: a plurality of first through holes are evenly and equidistantly formed on the edge of the upper disk, and a plurality of second through holes are evenly and equidistantly formed on the edge of the lower disk.

[0011] A further improvement of the technical solution of the present invention is that a first bearing is fixedly provided at one end of the connecting rod connected to the upper disc, and a first pin that can be inserted into the first through hole is provided on the inner ring of the first bearing.

[0012] A further improvement of the above technical solution of the present invention is that a second bearing is fixedly provided on one end of the connecting rod connected to the lower disc, and a second pin that can be inserted into the second through hole is fixedly provided on the inner ring of the second bearing.

[0013] A further improvement of the above technical solution of the present invention is that the rotating mechanism includes a servo motor connected to the combined bearing seat through a coupling, a combined tailstock is slidably arranged on the base, and a sample is hinged between the combined tailstock and the combined bearing seat.

[0014] A further improvement of the above technical solution of the present invention is that the test force loading mechanism includes a loading bearing seat installed on a bidirectional slide, a pulley is installed at one end of the articulated shaft of the loading bearing seat, a weight is hung on the pulley, and the other end of the articulated shaft is connected to a loading gear and a loading rack cooperating with the loading gear.

[0015] A further improvement of the technical solution of the present invention is that the loading rack is connected to a companion sample through a companion sample clamping device, the companion sample being in contact with the sample and having an axial direction perpendicular to the axial direction of the sample.

[0016] A further improvement of the technical solution of the present invention is that a torque sensor connected to the coupling is arranged between the servo motor and the combined bearing seat.

[0017] Due to the adoption of the above technical solution, the technical advances achieved by the present invention include:

[0018] The driving mechanism provided in the present invention can make the upper disc swing back and forth when the present invention is used to drive the sample to rotate, thereby further making the accompanying sample move back and forth within a certain range. Compared with the situation in which the accompanying sample is fixed in the prior art, the accompanying sample of the present invention wears more evenly, thereby making the surface roughness of the sample decrease evenly; at the same time, it can prevent the gap between the accompanying sample and the sample from being closed after long-term use, and prevent the surface roughness of the sample from being abnormally increased, resulting in test failure.

[0019] The present invention can drive the upper disc to rotate by means of the drive motor, reducer, lower disc and connecting rod. At the same time, since the diameter of the lower disc is smaller than the diameter of the upper disc, when the drive motor drives the lower disc to rotate in one direction, the upper disc can be swung back and forth under the action of the connecting rod, so that the bidirectional slide moves back and forth along the length direction of the sample, and finally the accompanying sample moves back and forth along the length direction of the sample within a certain range. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a roller roughness retention testing machine with a sample axial moving device according to the present invention;

[0021] Figure 2 It is a structural schematic diagram of another angle of a roller roughness retention tester with a sample axial moving device according to the present invention;

[0022] Figure 3 It is a schematic diagram of the connection structure between the upper disc and the driving mechanism in the first embodiment of a roller roughness retention tester with a sample axial movement device of the present invention;

[0023] Figure 4 It is a schematic structural diagram of a driving mechanism of a second embodiment of a roller roughness retention testing machine having an axial movement device for accompanying a sample according to the present invention.

[0024] In the attached figure: 1, base; 11, support leg; 2, rotating mechanism; 21, coupling; 22, servo motor; 23, combined tailstock; 24, combined bearing seat; 25, torque sensor; 26, connecting seat; 3, bidirectional slide; 4, test force loading mechanism; 41, loading bearing seat; 42, rope pulley; 43, weight; 44, weight plate; 45, loading gear; 46, loading rack; 47, sample clamping device; 48, moving seat; 49, Accompanying specimen; 5. slide; 51. threaded rod; 52. upper disc; 521. first through hole; 6. guide rail; 7. driving mechanism; 71. driving motor; 72. lower disc; 721. second through hole; 73. connecting rod; 731. first bearing; 732. first pin shaft; 733. second bearing; 734. second pin shaft; 74. double-headed motor; 75. first disc; 76. connecting bearing seat; 77. rotating shaft; 78. second disc; 8. specimen. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. In the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0026] Embodiment 1

[0027] First reference Figure 1 and Figure 2 ,according to Figure 1 and Figure 2 It can be seen that the present invention includes a base 1, which is supported on the ground by multiple supporting legs 11. At the same time, a rotating mechanism 2 for driving the sample 8 to rotate is provided on the base 1, and a test force loading mechanism 4 for applying test force to different axial positions of the sample 8 is provided on one side of the base 1.

[0028] The above-mentioned rotating mechanism 2 can continue to refer to the specific setting Figure 1 and Figure 2 ,according to Figure 1 and Figure 2 It can be seen that the rotating mechanism 2 in the present invention includes a servo motor 22 arranged on the base 1, the output shaft of the servo motor 22 is connected to the combined bearing seat 24 through the coupling 21, and the coupling 21 is provided with a torque sensor 25 for measuring the torque of the servo motor 22; continue to refer to Figure 1 and Figure 2 The base 1 is also provided with a combined tailstock 23 that cooperates with the combined bearing seat 24 to clamp the sample 8. The combined tailstock 23 is connected to the base 1 through a connecting seat 26 that is slidably arranged on the base 1, and a three-jaw chuck (not shown in the figure) for clamping the sample 8 is hinged on the combined bearing seat 24 and the combined tailstock 23.

[0029] In the present invention, when the connecting seat 26 is connected to the base 1 , a slide 5 may be provided between the connecting seat 26 and the base 1 , and the connecting seat 26 can move back and forth on the base 1 through the provided slide 5 .

[0030] The test force loading mechanism 4 in the present invention can be further referred to when setting it specifically. Figure 1 and Figure 2 ,according to Figure 1 and Figure 2 It can be seen that the test force loading mechanism 4 includes a bidirectional slide 3 arranged on the base 1, the top of the bidirectional slide 3 is fixedly connected to a loading bearing seat 41, the inner ring of the loading bearing seat 41 penetrates and is fixedly connected to a hinge shaft, one end of the hinge shaft is fixedly sleeved with a rope wheel 42, a weight plate 44 with a weight 43 is hung on the rope wheel 42, and the other end of the hinge shaft is fixedly sleeved with a loading gear 45; continue to refer to Figure 1 and Figure 2 A movable seat 48 that can move forward and backward is provided on the bidirectional slide 3, and a loading rack 46 that cooperates with the loading gear 45 is fixedly provided on the top of the movable seat 48 along the front-to-back direction, and the movable seat 48 holds a companion sample 49 in contact with the sample 8 through a companion sample clamping device 47 on the side facing the sample 8.

[0031] In the present invention, when the movable seat 48 and the bidirectional slide 3 are specifically connected, a first slide rail (not shown in the figure) can be fixedly connected to the bidirectional slide 3, and a first slide groove (not shown in the figure) matching the first slide rail is provided at the position of the movable seat 48 corresponding to the first slide rail. By setting the first slide rail and the first slide groove, the movable seat 48 can move back and forth on the bidirectional slide 3.

[0032] In the present invention, the bidirectional slide 3 and the base 1 are specifically connected, and the connection is as follows: Figure 1 and Figure 2 A slide table 5 parallel to the sample 8 is fixedly arranged on the base 1, and a slider of the slide table 5 is fixedly connected to a guide rail 6 which is perpendicular to the slide table 5 and slidably connected to the bidirectional slide 3. A second slide groove matching the guide rail 6 is provided at the bottom of the bidirectional slide 3 corresponding to the position of the guide rail 6.

[0033] Continue to refer Figure 1 and Figure 2 One end of the threaded rod 51 in the slide 5 extends to the outside of the slide 5 and is fixedly sleeved with an upper disc 52, and the upper disc 52 is detachably connected to a driving mechanism 7 for driving the upper disc 52 to swing back and forth.

[0034] The above-mentioned driving mechanism 7 can be referred to when setting it specifically. Figure 1 , Figure 2 and Figure 3 ,according to Figure 1 , Figure 2 and Figure 3 It can be seen that the driving mechanism 7 includes a driving motor 71 disposed on the ground below the base 1, and the output shaft of the driving motor 71 is provided with a lower disc 72 through a reducer fixed sleeve, and the diameter of the lower disc 72 is smaller than the diameter of the upper disc 52; Figure 3 A plurality of first through holes 521 are equidistantly formed at the edge of the upper disk 52 , and a plurality of second through holes 721 are equidistantly formed at the edge of the lower disk 72 . The upper disk 52 and the lower disk 72 are connected via a detachable connecting rod 73 .

[0035] When the connecting rod 73 is specifically connected to the upper disc 52 and the lower disc 72, please continue to refer to Figure 3 The end of the connecting rod 73 connected to the upper disk 52 is connected to a first bearing 731, and the inner ring of the first bearing 731 is connected to a first pin 732 that can be inserted into the first through hole 521; continue to refer to Figure 3 One end of the connecting rod 73 connected to the lower disc 72 is connected to a second bearing 733 , and the inner ring of the second bearing 733 is connected to a second pin shaft 734 that can be inserted into the second through hole 721 .

[0036] The working principle of the roller roughness retention tester with the accompanying sample axial moving device in this embodiment is: first, the sample 8 is clamped between the combined bearing seat 24 and the combined tailstock 23, and then the upper disc 52 is rotated to adjust the left and right position of the bidirectional slide 3 until the accompanying sample 49 is aligned with the position of the sample 8 to be tested, and then the front and rear position of the bidirectional slide 3 is adjusted until the accompanying sample 49 contacts the position of the sample 8 to be tested; and then weights 43 of different weights are placed on the weight plate 43, so as to adjust the loading force of the accompanying sample 49 on the sample 8, thereby simulating the degree of wear of the sample 8 when it is subjected to different external forces.

[0037] Then, the upper disc 52 and the lower disc 72 are connected by the connecting rod 73; then the servo motor 22 is started, and the servo motor 22 drives the sample 8 to rotate; while the servo motor 22 rotates, the drive motor 71 is started, and the drive motor 71 drives the lower disc 72 to rotate. Since the diameter of the lower disc 72 is smaller than the diameter of the upper disc 52, the lower disc 72 can drive the upper disc 52 to swing back and forth through the connecting rod 73 when it rotates. While the upper disc 52 swings back and forth, it can drive the threaded rod 51 in the slide 5 to rotate back and forth, so that the two-way slide 5 moves back and forth left and right within a certain range, so that the accompanying sample 49 moves back and forth left and right within the moving range. Compared with the situation in which the accompanying sample 49 is fixed in the prior art, the accompanying sample 49 of the present invention wears more evenly, so that the surface roughness of the sample 8 decreases evenly; at the same time, it can prevent the gap between the accompanying sample 49 and the sample 8 from being bridged after long-term use, and prevent the abnormal increase in the surface roughness of the sample 8 from causing the test failure.

[0038] Embodiment 2

[0039] Embodiment 2 is based on embodiment 1, and the servo motor 22 in embodiment 1 is replaced with a double-headed motor 74, and a first disc 75 is fixedly sleeved on the end of the output shaft of the double-headed motor 74 away from the sample 8; at the same time, the driving mechanism 7 of embodiment 1 is replaced with a connecting bearing seat 76 located below the base 1 and set on the ground, and the inner ring of the connecting bearing seat 76 passes through and is fixedly connected with a rotating shaft 77, and one end of the rotating shaft 77 is fixedly sleeved with a second disc 78 connected to the first disc 75 and with the same diameter, and the other end of the rotating shaft 77 is fixedly sleeved with a lower disc 72, and the specific structure of the remaining parts is the same as the specific structure of embodiment 1, and the connection method of the first disc 75 and the second disc 78 in this embodiment is the same as the connection method of the upper disc 52 and the lower disc 72.

[0040] The working principle of the roller roughness retention tester with the accompanying sample axial moving device of this embodiment is: first, the sample 8 is clamped between the combined bearing seat 24 and the combined tailstock 23, and then the upper disc 52 is rotated to adjust the left and right position of the bidirectional slide 3 until the accompanying sample 49 is aligned with the position of the sample 8 to be tested, and then the front and rear position of the bidirectional slide 3 is adjusted until the accompanying sample 49 contacts the position of the sample 8 to be tested; and then weights 43 of different weights are placed on the weight plate 44, which can adjust the loading force of the accompanying sample 49 on the sample 8, thereby simulating the degree of wear of the sample 8 when it is subjected to different external forces.

[0041] Then, the upper disc 52 and the lower disc 72 are connected by the connecting rod 73; then the double-headed motor 74 is started, and the double-headed motor 74 can drive the first disc 75 to rotate while driving the sample 8 to rotate. The rotating first disc 75 drives the second disc 78 to rotate, and the rotating second disc 78 drives the rotating shaft 77 to rotate. The rotating rotating shaft 77 drives the lower disc 72 to rotate. Since the diameter of the lower disc 72 is smaller than the diameter of the upper disc 52, when the lower disc 72 rotates, it can drive the upper disc 52 to swing back and forth through the connecting rod 73. When the upper disc 52 swings back and forth, it can drive the threaded rod 51 in the slide 5 to rotate back and forth, so that the two-way slide 5 moves back and forth within a certain range, so that the accompanying sample 49 moves back and forth within the moving range. Compared with the situation in which the accompanying sample 49 is fixed in the prior art, the accompanying sample 49 of the present invention wears more evenly, so that the surface roughness of the sample 8 decreases evenly; at the same time, it can prevent the gap between the accompanying sample 49 and the sample 8 from being bridged after long-term use, and prevent the abnormal increase in the surface roughness of the sample 8 from causing the test failure.

[0042] In the above embodiment, the present invention provides a roller roughness retention testing machine with an axial moving device for a companion sample. Through the provided driving mechanism, when the present invention is used to drive the sample to rotate, the upper disc can swing back and forth, thereby further moving the companion sample back and forth within a certain range. Compared with the prior art in which the companion sample is fixed, the companion sample of the present invention wears more evenly, thereby making the surface roughness of the sample decrease evenly; at the same time, it can prevent the gap between the companion sample and the sample from being closed after long-term use, and prevent the surface roughness of the sample from abnormally increasing and causing test failure; at the same time, the present invention can drive the upper disc to rotate through the provided driving motor, reducer, lower disc and connecting rod. At the same time, since the diameter of the lower disc is smaller than the diameter of the upper disc, when the driving motor drives the lower disc to rotate in one direction, the upper disc can swing back and forth under the action of the connecting rod, thereby making the bidirectional slide move back and forth along the length direction of the sample, and finally making the companion sample move back and forth along the length direction of the sample within a certain range.

[0043] The above-described embodiments are merely descriptions of preferred implementations of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by ordinary persons in the art to the technical solution of the present invention should fall within the protection scope of the present invention, and the technical contents for which protection is sought in the present invention have been fully recorded in the claims.

Claims

1. A roller roughness retention tester with a sample axial movement device, comprising a base (1), a rotating mechanism (2) for driving a sample (8) to rotate, and a test force loading and unloading mechanism connected to the base (1) via a bidirectional slide (3) for applying a test force to different axial positions of the sample (8), Features: The bidirectional slide (3) is connected to the base (1) via a slide (5) parallel to the length direction of the sample (8); the bidirectional slide (3) is connected to the slide (5) via a guide rail (6) perpendicular to the slide (5); one end of a threaded rod (51) in the slide (5) extends to one side of the slide (5) and is fixedly sleeved with an upper disc (52); and a driving mechanism (7) is also included which is detachably connected to the upper disc (52) and is used to drive the upper disc (52) to swing back and forth.

2. A roller roughness retention testing machine with a sample axial moving device according to claim 1, Features: The driving mechanism (7) comprises a driving motor (71) located below the base (1); the output shaft of the driving motor (71) is fixedly sleeved with a lower disc (72) connected to the upper disc (52) via a connecting rod (73) and having a smaller diameter than the upper disc (52).

3. A roller roughness retention testing machine with a sample axial moving device according to claim 2, Features: The output shaft of the driving motor (71) is connected to the lower disc (72) via a speed reducer, and the driving motor (71) is installed on the ground via a motor seat.

4. A roller roughness retention testing machine with a sample axial moving device according to claim 2, Features: The edge of the upper circular disk (52) is uniformly and evenly provided with a plurality of first through holes (521), and the edge of the lower circular disk (72) is uniformly and evenly provided with a plurality of second through holes (721).

5. A roller roughness retention testing machine with a sample axial moving device according to claim 4, Features: A first bearing (731) is fixedly provided at one end of the connecting rod (73) connected to the upper disc (52), and a first pin shaft (732) which can be inserted into the first through hole (521) is provided on the inner ring of the first bearing (731).

6. A roller roughness retention testing machine with a sample axial moving device according to claim 5, Features: A second bearing (733) is fixedly provided at one end of the connecting rod (73) connected to the lower disc (72), and a second pin shaft (734) which can be inserted into the second through hole (721) is fixedly provided on the inner ring of the second bearing (733).

7. A roller roughness retention testing machine with a sample axial moving device according to any one of claims 1 to 6, Features: The rotating mechanism (2) comprises a servo motor (22) connected to a combined bearing seat (24) via a coupling (21); a combined tail seat (23) is slidably arranged on the base (1); and a specimen (8) is hingedly connected between the combined tail seat (23) and the combined bearing seat (24).

8. A roll roughness retention testing machine with a sample axial moving device according to any one of claims 1 to 6, Features: The test force loading mechanism (4) comprises a loading bearing seat (41) mounted on a bidirectional slide seat (3); a rope pulley (42) is mounted on one end of a hinge shaft of the loading bearing seat (41); a weight (43) is suspended on the rope pulley (42); and a loading gear (45) and a loading rack (46) matched with the loading gear (45) are connected to the other end of the hinge shaft.

9. A roll roughness retention testing machine with a sample axial moving device according to claim 8, Features: The loading rack (46) is connected to a companion sample (49) through a companion sample clamping device (47), the companion sample (49) being in contact with the sample (8) and having an axial direction perpendicular to the axial direction of the sample (8).

10. A roll roughness retention testing machine with a sample axial moving device according to claim 7, Features: A torque sensor (25) connected to the coupling (21) is arranged between the servo motor (22) and the combined bearing seat (24).

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