Metal material rotation and bending fatigue test equipment

Abstract

The utility model relates to metal material rotation and bending fatigue test equipment which comprises a workbench and a test unit arranged at the upper end of the workbench, and a third movable groove is formed in the workbench; a surface treatment unit is further arranged on the workbench. The surface treatment unit comprises two fixed blocks symmetrically and fixedly connected to the lower end of the workbench, a second motor fixedly connected to the lower end of the workbench, a movable base movably connected into the third movable groove, a first lead screw rotationally connected between the two fixed blocks and connected into the movable base in a screwed mode, and a polishing module arranged on one side of the fixed blocks and used for installing abrasive paper. An output shaft of the second motor penetrates through the adjacent fixing blocks and is fixedly connected with one end of the first lead screw. Compared with the prior art, the outer surface of a metal material can be uniformly polished, the surface of the metal material is kept flat and smooth, small defects on the surface of the metal material are eliminated, the situation that the fatigue life of a sample is shortened due to the fact that the defects become stress concentration points is avoided, and the accuracy of a bending fatigue test is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of metal material performance detection, in particular to a metal material rotation and bending fatigue testing device. Background Art

[0002] Rotary bending fatigue test is the earliest fatigue performance test method, initially used for fatigue performance test of axles. The commonly used test standard is GB / T 4337 Rotary Bending Method for Fatigue Test of Metallic Materials, which is mainly used for fatigue performance test of metallic materials used for rotating shafts.

[0003] An existing patent (a Chinese invention patent with publication number CN114813389A) discloses a rotary bending corrosion fatigue test device for metal materials, which can ensure that the metal materials can be subjected to a rotary bending fatigue test in a liquid corrosive medium environment. However, when the metal materials are transported after processing, their surfaces may collide during transportation, causing small scratches and dents on the surface of the materials. These defects may become stress concentration points, thereby reducing the fatigue life of the specimen and affecting the accuracy of the fatigue test. Utility Model Content

[0004] The purpose of the utility model is to provide a metal material rotation and bending fatigue testing equipment in order to overcome the defects of the above-mentioned prior art, which can evenly grind the outer surface of the metal material, keep the surface of the metal material flat and smooth, eliminate small defects on the surface of the metal material, avoid these defects from becoming stress concentration points that lead to a decrease in the fatigue life of the sample, and improve the accuracy of the bending fatigue test.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] The utility model provides a metal material rotation and bending fatigue testing device, comprising a workbench and a testing unit arranged at the upper end of the workbench, a third movable groove is opened inside the workbench; a surface treatment unit is also arranged on the workbench, the surface treatment unit comprises two fixed blocks symmetrically fixed to the lower end of the workbench, a second motor fixed to the lower end of the workbench, a movable seat movably connected in the third movable groove, a first screw rod rotatably connected between the two fixed blocks and screwed in the movable seat, a grinding module arranged on one side of the fixed block for installing sandpaper, and the output shaft of the second motor passes through the adjacent fixed blocks and is fixedly connected to one end of the first screw rod.

[0007] Furthermore, a second movable groove is provided inside the movable seat, and the polishing module is movably connected in the second movable groove.

[0008] Furthermore, a second screw rod threaded in the grinding module is rotatably connected in the second movable groove, a third motor is fixedly connected to the upper end of the movable seat, and an output shaft of the third motor passes through the movable seat and is fixedly connected to one end of the second screw rod.

[0009] Furthermore, two slide rails are symmetrically fixed to the upper end of the workbench, and slide bars slidably connected to the slide rails are fixed to both sides of the movable seat.

[0010] Furthermore, the grinding module includes: a screw sleeve movably connected in the second movable groove and screwed to the outside of the second screw rod, a fixed seat fixed to one side of the screw sleeve, an extension end integrally formed on one side of the fixed seat, a sleeve body sleeved on the outside of the extension end, a third screw rod screwed inside the sleeve body, a limit block rotatably connected to the end of the first screw rod, and a limit groove opened inside the extension end to accommodate the limit block.

[0011] Furthermore, the polishing module is equipped with sandpaper, and the sandpaper is in contact with the outer surface of the metal material to polish the outer surface of the metal material. When the polishing module moves, the sandpaper can perform mobile polishing on the outer surface of the metal pipe.

[0012] Furthermore, a cover body is provided at the upper end of the workbench, and a UV lamp tube, a nozzle and an ultraviolet lamp are fixedly connected to the inner wall of the cover body, and the input end of the nozzle passes through the cover body and extends outward.

[0013] Furthermore, a pump body is fixedly connected to the upper end of the workbench and is used to be connected to the input end of the nozzle to pump liquid into the nozzle.

[0014] Furthermore, a material storage box is provided under the workbench.

[0015] Furthermore, the test unit includes: a first movable groove opened inside the workbench, a first motor and a reducer fixedly connected to the upper end of the workbench, two pairs of support seats symmetrically fixedly connected to the workbench, two spindle boxes rotatably connected to the two pairs of support seats respectively, two spring chucks rotatably connected inside the two spindle boxes, a flexible shaft connecting the output shaft of the first motor with one of the spring chucks, a metal pipe with both ends clamped in the two spring chucks, a hanging plate rotatably connected to the lower ends of the two spindle boxes and located in the first movable groove, a hanging rod fixedly connected to the lower end of the hanging plate, a tray fixedly connected to the lower end of the hanging rod, and a limiting bolt that passes through the support seat and is screwed into the inside of the spindle box.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] (1) The utility model is provided with a surface treatment unit, and the second motor can drive the first screw to rotate, so that the movable seat moves along the third movable groove, and sandpaper is installed on the grinding module on one side of the movable seat. The sandpaper contacts the outer surface of the metal material and can grind the outer surface of the metal material. The movement of the movable seat drives the movement of the sandpaper, which can evenly grind the outer surface of the metal material, keep the surface of the metal material flat and smooth, eliminate small defects on the surface of the metal material, and avoid these defects becoming stress concentration points that lead to a reduction in the fatigue life of the sample, thereby improving the accuracy of the bending fatigue test.

[0018] (2) The utility model is provided with a third motor and a second screw rod. The third motor drives the second screw rod and the grinding module to move, so that different areas of the sandpaper on the grinding module can contact the outer surface of the metal material, making the wear of each area of ​​the sandpaper more uniform, avoiding excessive wear caused by long-term contact between the same area of ​​the sandpaper and the outer surface of the metal material, thereby losing the grinding effect, and extending the service life of the sandpaper. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of this application;

[0020] Figure 2 This is a schematic diagram of the test unit and pump structure for this application;

[0021] Figure 3 This is a schematic diagram of the structure of the second motor, fixed block, first screw rod and third movable slot of the present application;

[0022] Figure 4 This is a schematic diagram of the structure of the movable seat, the second movable slot, the second screw rod and the slide bar of the present application;

[0023] Figure 5 Polishing module structure diagram for this application;

[0024] Figure 6 This is a schematic diagram of the UV lamp tube, nozzle and ultraviolet lamp structure of this application.

[0025] Figure numerals: 1, workbench; 11, first movable groove; 12, slide rail; 13, third movable groove; 2, test unit; 21, first motor; 22, reducer; 23, flexible shaft; 24, spindle box; 25, support seat; 26, spring chuck; 27, limit bolt; 28, hanging plate; 281, hanging rod; 282, tray; 29, metal pipe; 3, cover; 31, UV lamp; 32, nozzle; 33, ultraviolet Light; 4. Pump body; 5. Storage box; 6. Surface treatment unit; 61. Second motor; 62. Fixed block; 63. First screw rod; 64. Movable seat; 65. Grinding module; 651. Screw sleeve; 652. Fixed seat; 653. Extension end; 654. Limiting groove; 655. Sleeve; 656. Third screw rod; 657. Limiting block; 66. Second movable groove; 67. Third motor; 68. Second screw rod; 69. Slide bar. DETAILED DESCRIPTION

[0026] The following is a detailed description of the present invention in conjunction with the accompanying drawings and specific embodiments. Component models, material names, connection structures, control methods, algorithms and other features not clearly described in this technical solution are all considered to be common technical features disclosed in the prior art.

[0027] Example 1

[0028] This embodiment provides a metal material rotation and bending fatigue testing device, such as Figure 1 , 2 As shown in , 3, 4, 5, and 6, it includes a workbench 1 and a test unit 2 arranged at the upper end of the workbench 1, and a third movable groove 13 is opened inside the workbench 1; a surface treatment unit 6 is also arranged on the workbench 1, and the surface treatment unit 6 includes two fixed blocks 62 symmetrically fixed to the lower end of the workbench 1, a second motor 61 fixed to the lower end of the workbench 1, a movable seat 64 movably connected in the third movable groove 13, a first screw rod 63 rotatably connected between the two fixed blocks 62 and screwed in the movable seat 64, and a grinding module 65 arranged on one side of the fixed block 62 for installing sandpaper, and the output shaft of the second motor 61 passes through the adjacent fixed blocks 62 and is fixed to one end of the first screw rod 63.

[0029] like Figure 4 As shown, in a specific embodiment, a second movable groove 66 is opened inside the movable seat 64 , and the polishing module 65 is movably connected in the second movable groove 66 .

[0030] In a specific embodiment, a second screw rod 68 threaded in the grinding module 65 is rotatably connected in the second movable groove 66 , a third motor 67 is fixedly connected to the upper end of the movable seat 64 , and an output shaft of the third motor 67 passes through the movable seat 64 and is fixedly connected to one end of the second screw rod 68 .

[0031] When the third motor 67 drives the second screw rod 68 to rotate, the second screw rod 68 can drive the grinding module 65 to move in the Z-axis direction. When the grinding module 65 moves up and down, the contact area between the sandpaper and the metal pipe 29 will also change, so that different areas of the sandpaper on the grinding module 65 are in contact with the outer surface of the metal pipe 29, making the wear of each area of ​​the sandpaper more uniform, avoiding excessive wear caused by long-term contact between the same area of ​​the sandpaper and the outer surface of the metal pipe 29, thereby losing the grinding effect, and at the same time extending the service life of the sandpaper.

[0032] In a specific embodiment, two slide rails 12 are symmetrically fixed to the upper end of the workbench 1 , and slide bars 69 slidably connected to the slide rails 12 are fixed to both sides of the movable seat 64 .

[0033] In a specific embodiment, the grinding module 65 includes: a screw sleeve 651 movably connected in the second movable groove 66 and screwed to the outside of the second screw rod 68, a fixed seat 652 fixedly connected to one side of the screw sleeve 651, an extension end 653 integrally formed on one side of the fixed seat 652, a sleeve body 655 sleeved on the outside of the extension end 653, a third screw rod 656 screwed inside the sleeve body 655, a limit block 657 rotatably connected to the end of the first screw rod 63, and a limit groove 654 opened inside the extension end 653 to accommodate the limit block 657.

[0034] The method for installing sandpaper on the grinding module 65 is: remove the sleeve 655 from the extension end 653, then fit the sandpaper on one side of the extension end 653, and then put the sleeve 655 on the outside of the extension end 653, press the four sides of the sandpaper into the gap between the sleeve 655 and the extension end 653 and be able to press the four sides of the sandpaper tightly, at this time, the fixed limit of the four sides of the sandpaper is completed, and then rotate the third screw rod 656 to drive the limit block 657 to move toward the limit groove 654, so that the limit block 657 is inserted into the limit groove 654. When the limit block 657 is inserted into the limit groove 654, the sandpaper can be tightened so that one side of the sandpaper is tightly attached to the side of the extension end 653 that is away from the screw sleeve 651.

[0035] In a specific embodiment, the second motor 61 drives the lead screw 63 to rotate, and the first lead screw 63 rotates to drive the movable seat 64 to move axially along the X axis in the third movable groove 13. The movable seat 64 moves and the grinding module 65 also moves accordingly. The grinding module 65 is equipped with sandpaper, and the sandpaper contacts the outer surface of the metal material to achieve grinding of the outer surface of the metal material. When the grinding module 65 moves, the sandpaper can perform mobile grinding on the outer surface of the metal pipe 29. The outer surface of the metal pipe 29 is polished more evenly, the surface of the metal pipe 29 is kept flat and smooth, and small defects on the surface of the metal pipe 29 are eliminated, so as to avoid these defects becoming stress concentration points that reduce the fatigue life of the sample, thereby improving the accuracy of the bending fatigue test.

[0036] In a specific embodiment, a cover body 3 is further provided at the upper end of the workbench 1 , and a UV lamp tube 31 , a nozzle 32 and an ultraviolet lamp 33 are fixedly connected to the inner wall of the cover body 3 , and the input end of the nozzle 32 passes through the cover body 3 and extends outward.

[0037] In a specific embodiment, a pump body 4 is fixedly connected to the upper end of the workbench 1 and is used to be connected to the input end of the nozzle 32 to pump liquid into the nozzle 32 .

[0038] In a specific embodiment, a material storage box 5 is further provided under the workbench 1 .

[0039] The UV lamp tube 31 is an infrared lamp tube, which can generate heat to increase the temperature inside the cover body 3, and can perform a rotational bending fatigue test on the metal pipe 29 at a certain temperature. The ultraviolet lamp 33 can emit ultraviolet rays and irradiate the metal pipe 29 to evaluate the aging and fatigue performance of the metal pipe 29 under long-term ultraviolet exposure. The nozzle 32 can spray water or cleaning fluid. The function of spraying water is to simulate the rotational bending fatigue test of the metal pipe 29 in a fluid environment. The cleaning fluid is used to clean the polished metal pipe 29. At the same time, it can also rinse the oil stains on the outer surface of the metal pipe to avoid slippage or stress concentration caused by the oil stains, which affects the fatigue life. The storage box 5 can collect water and cleaning fluid.

[0040] In a specific embodiment, the test unit 2 includes: a first movable groove 11 opened inside the workbench 1, a first motor 21 and a reducer 22 fixedly connected to the upper end of the workbench 1, two pairs of support seats 25 symmetrically fixed to the workbench 1, two spindle boxes 24 rotatably connected to the two pairs of support seats 25 respectively, two spring clamps 26 rotatably connected inside the two spindle boxes 24, a soft shaft 23 connecting the output shaft of the first motor 21 with one of the spring clamps 26, a metal pipe 29 with both ends clamped in the two spring clamps 26, a hanging plate 28 rotatably connected to the lower ends of the two spindle boxes 24 and located in the first movable groove 11, a hanging rod 281 fixedly connected to the lower end of the hanging plate 28, a tray 282 fixedly connected to the lower end of the hanging rod 281, and a limiting bolt 27 that passes through the support seat 25 and is screwed into the inside of the spindle box 24.

[0041] The first motor 21 serves as the main power output of the test unit 2 and is used to drive the metal pipe 29 to rotate. The power of the first motor 21 is decelerated by the reducer 22 and then transmitted to the flexible shaft 23. The flexible shaft 23 drives one of the spring chucks 26 to rotate in one of the spindle boxes 24. The rotating spring chuck 26 drives the metal pipe groove 29 and the other spring chuck 26 to rotate. Before adding load to the metal pipe 29 for a rotational bending test, the limit bolt 27 is unscrewed from the spindle box 24 to cancel the limit on the spindle box 24, and then the weight is placed on the tray 282. The weight of the weight acts on the spindle box 24 through the hanger 281 and the hanger plate 28, so that the two spindle boxes 24 are tilted at a certain degree, and a bending test force is applied to the metal pipe 29. The rotational bending test is a mature testing technology in the prior art, and the specific principle will not be repeated here.

[0042] Components not described in detail in this embodiment are all existing components that can be purchased through public channels.

[0043] The above description of the embodiments is to facilitate the understanding and use of the utility model by those skilled in the art. It is obvious that those familiar with the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the utility model is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the utility model without departing from the scope of the utility model should be within the scope of protection of the utility model.

Claims

1. A metal material rotation and bending fatigue testing device, characterized in that: The invention comprises a workbench (1) and a testing unit (2) arranged at the upper end of the workbench (1); a third movable groove (13) is provided inside the workbench (1); a surface treatment unit (6) is also provided on the workbench (1); the surface treatment unit (6) comprises two fixed blocks (62) symmetrically fixed to the lower end of the workbench (1), a second motor (61) fixed to the lower end of the workbench (1), a movable seat (64) movably connected in the third movable groove (13), a first screw rod (63) rotatably connected between the two fixed blocks (62) and screwed in the movable seat (64), and a grinding module (65) arranged on one side of the fixed block (62) for installing sandpaper, wherein the output shaft of the second motor (61) passes through the adjacent fixed block (62) and is fixed to one end of the first screw rod (63).

2. A metal material rotation and bending fatigue testing device according to claim 1, characterized in that: A second movable groove (66) is provided inside the movable seat (64), and the polishing module (65) is movably connected in the second movable groove (66).

3. A metal material rotation and bending fatigue testing device according to claim 2, characterized in that: A second screw rod (68) threaded in the grinding module (65) is rotatably connected in the second movable groove (66), a third motor (67) is fixedly connected to the upper end of the movable seat (64), and an output shaft of the third motor (67) passes through the movable seat (64) and is fixedly connected to one end of the second screw rod (68).

4. The metal material rotation and bending fatigue testing equipment according to claim 1, characterized in that: The upper end of the workbench (1) is symmetrically fixed with two slide rails (12), and both sides of the movable seat (64) are fixed with slide bars (69) which are slidably connected in the slide rails (12).

5. The metal material rotation and bending fatigue testing equipment according to claim 1, characterized in that: The grinding module (65) comprises: a screw sleeve (651) movably connected in a second movable groove (66) and screwed to the outside of a second screw rod (68), a fixing seat (652) fixed to one side of the screw sleeve (651), an extension end (653) integrally formed on one side of the fixing seat (652), a sleeve body (655) sleeved on the outside of the extension end (653), a third screw rod (656) screwed to the inside of the sleeve body (655), a limit block (657) rotatably connected to the end of the first screw rod (63), and a limit groove (654) provided in the extension end (653) for accommodating the limit block (657).

6. The metal material rotation and bending fatigue testing equipment according to claim 1, characterized in that: The polishing module (65) is equipped with sandpaper, and the sandpaper is in contact with the outer surface of the metal material to polish the outer surface of the metal material. When the polishing module (65) moves, the sandpaper can perform mobile polishing on the outer surface of the metal pipe (29).

7. The metal material rotation and bending fatigue testing equipment according to claim 1, characterized in that: A cover body (3) is also provided at the upper end of the workbench (1), and a UV lamp tube (31), a nozzle (32) and an ultraviolet lamp (33) are fixedly connected to the inner wall of the cover body (3), and the input end of the nozzle (32) passes through the cover body (3) and extends outward.

8. The metal material rotation and bending fatigue testing equipment according to claim 1, characterized in that: The upper end of the workbench (1) is also fixedly connected with a pump body (4) for connecting to the input end of the nozzle (32) to pump liquid into the nozzle (32).

9. The metal material rotation and bending fatigue testing equipment according to claim 1, characterized in that: A material storage box (5) is also provided below the workbench (1).

10. The metal material rotation and bending fatigue testing equipment according to claim 1, characterized in that: The test unit (2) comprises: a first movable groove (11) provided inside the workbench (1), a first motor (21) and a reducer (22) fixedly connected to the upper end of the workbench (1), two pairs of support seats (25) symmetrically fixedly connected to the workbench (1), two spindle boxes (24) rotatably connected to the two pairs of support seats (25), two spring clamps (26) rotatably connected inside the two spindle boxes (24), a flexible shaft (23) connecting the output shaft of the first motor (21) to one of the spring clamps (26), a metal pipe (29) with both ends clamped in the two spring clamps (26), a hanging plate (28) rotatably connected to the lower ends of the two spindle boxes (24) and located in the first movable groove (11), a hanging rod (281) fixedly connected to the lower end of the hanging plate (28), a tray (282) fixedly connected to the lower end of the hanging rod (281), and a limit bolt (27) penetrating the support seat (25) and screwed into the inside of the spindle box (24).

Images