Round rod sample surface polishing device

Abstract

The utility model discloses a round bar sample surface polishing device which comprises a base, a centering part and an abrasive belt polishing part used for polishing a round bar sample, the centering part comprises a containing plate, a placing plate, a hollow column, a supporting column, a fixing frame and a pressing plate, and the containing plate is welded to the outer wall of the top of the base through a supporting block; the outer wall of the bottom of the containing plate is fixedly connected with a third electric telescopic rod, the containing plate is fixed to the output end of the third electric telescopic rod through a pin, the hollow column is movably connected to the inner wall of a through hole formed in the containing plate, and a three-jaw chuck is welded to the outer wall of the top of the supporting column. The polishing abrasive belt is in full contact with the circumferential outer wall of the round bar sample, so that polishing dead angles are avoided; the tensioning degree of the polishing abrasive belt can be adjusted, so that the polishing effect is guaranteed; and when the round bar sample needs to be polished, the whole device is covered with the two protective covers, and the safety of the polishing process is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding, in particular to a surface grinding device for round bar specimens. Background Technique

[0002] Steel is an alloy with polymorphic phase transformation. Its high-temperature structure and transformation products have different specific volumes. Therefore, when a steel specimen is heated or cooled, in addition to the volume change caused by thermal expansion and contraction, there is also a volume change caused by phase transformation. Measuring the change in the size of the sample with temperature shows the change point of thermal expansion, so as to determine the phase transformation temperature, that is, the solid-state phase transformation critical point of steel.

[0003] The phase transformation instrument can simulate and measure the widest range of heating, cooling and deformation conditions with the highest precision, and can accurately characterize the longitudinal and transverse dimensional changes of the sample. The quenched and compressed specimens used for testing by the phase transformation instrument require that the end faces are strictly parallel, the specimens are bright and clean, and the size is usually a round bar specimen of Φ4*10mm or Φ5*10mm. The specimens are generally processed from the slab by wire cutting, which results in rust and wire cutting marks on the surface of the processed specimens. In order to ensure the surface finish of the specimens, it is necessary to grind the circumferential outer wall of the specimens to meet the test requirements.

[0004] After retrieval, the patent with the application number CN202022857201.7 discloses "a simple surface treatment device for round bar specimens", which includes a fixed table. Two symmetrically placed fixed bottom plates are installed on the fixed table. A first slider is provided on the fixed bottom plate. A vertical beam is fixedly installed at the upper end of the first slider. A second slider is installed on the vertical beam, and a fixed plate is arranged at the outer end of the second slider; a high-speed motor is arranged inside the fixed table. The high-speed motor is located between the two fixed bottom plates, and a three-jaw chuck is arranged above the high-speed motor.

[0005] The following problems exist in the above-mentioned simple surface treatment device for round bar specimens: The specimens are not suitable for being clamped by a three-jaw chuck due to their short length dimensions. During the clamping process, part of the circumferential outer wall of the sample is clamped by the three-jaw chuck, so that the entire circumferential outer wall of the specimen cannot be ground, resulting in grinding dead corners. Content of the Utility Model

[0006] The purpose of the utility model is to provide a surface grinding device for round bar specimens to solve the problems raised in the above background technique.

[0007] To achieve the above object, the present utility model provides the following technical solution: A surface grinding device for round bar specimens, including a base, a centering part, and a sand belt grinding part for grinding round bar specimens. The centering part includes a receiving plate, a placing plate, a hollow column, a support column, a fixing frame, and a pressing plate. The receiving plate is welded to the outer wall of the top of the base through a support block, and an electric telescopic rod three is fixedly connected to the outer wall of the bottom of the receiving plate. The placing plate is fixed to the output end of the electric telescopic rod three through a pin. The hollow column is movably connected to the inner wall of the through hole opened on the placing plate, and a three-jaw chuck is welded to the outer wall of the top of the support column. A driving rib is integrally formed on the circumferential outer wall of the support column, and the outer wall of the bottom of the support column is movably connected to the outer wall of the top of the receiving plate. The bottom of the hollow column is provided with a through hole adapted to the driving rib and the outer diameter of the support column. The diameter of the support column is less than or equal to the diameter of the round bar specimen. A gear is fixedly connected to the top of the hollow column, and a plurality of gears are sequentially meshed. The fixing frame is fixed to the outer wall of the top of the base, and an electric telescopic rod two is fixed to the outer wall of the top of the fixing frame. The pressing plate is fixed to the output end of the electric telescopic rod two through a pin, and a rotating ejector rod is movably connected to the outer wall of the bottom of the pressing plate. The rotating ejector rod is centered with the center of the three-jaw chuck, and the diameter of the rotating ejector rod is less than or equal to the diameter of the round bar specimen.

[0008] Preferably, an L-shaped plate is fixed to the outer wall of the top of the placing plate, and a driving motor one is fixed to the outer wall of the top of the L-shaped plate. A sprocket is fixed to the output end of the driving motor one and the circumferential outer wall of one of the hollow columns through pins, and the two sprockets are driven by a chain.

[0009] Preferably, the sand belt grinding part includes a pulley one and a pulley two. Both the pulley one and the pulley two are movably connected to the outer wall of the top of the placing plate. The same grinding sand belt is movably connected between the pulley one, the pulley two, and the round bar specimen.

[0010] Preferably, a bracket is fixed to the outer wall of the top of the placing plate, and a driving motor two is fixed to the outer wall of the top of the bracket. The output end of the driving motor two is connected to the top of the pulley one through a coupling.

[0011] Preferably, a rectangular plate is fixed to the outer wall of the top of the placing plate, a threaded rod is movably connected to the inner wall of the threaded hole opened on the surface of the rectangular plate, and one end of the threaded rod is movably connected to a U-shaped frame.

[0012] Preferably, a limiting rod is fixed to the outer wall of one side of the U-shaped frame through a pin, and a tensioning wheel is movably connected to the inner wall of the U-shaped frame.

[0013] Preferably, a vertical plate is fixed to the outer wall of the top of the base, and an electric telescopic rod one is fixed to the outer wall of one side of the vertical plate.

[0014] Preferably, a protective cover is fixed to the output end of the electric telescopic rod one through a pin.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] 1. By installing a three-jaw chuck on the gear to center the round bar specimen and the support column, and the rotating ejector rod is centered with the center of the three-jaw chuck, the centering of the rotating ejector rod, the round bar specimen and the support column is realized;

[0017] 2. By arranging the rotating ejector rod and the support column to cooperate, the two end faces of the round bar specimen are pressed and fixed. The gear drives the support column with a driving rib to rotate, and the rotating ejector rod can drive the round bar specimen to rotate in cooperation;

[0018] 3. By driving the placement plate to move downward, the surface of the round bar specimen to be polished is completely exposed outside. The diameters of the rotating ejector rod and the support column are less than or equal to the diameter of the round bar specimen, so as to realize the full contact between the polishing sand belt and the circumferential outer wall of the round bar specimen, avoiding polishing dead angles;

[0019] 4. By setting the rotation directions of the output ends of the second driving motor and the first driving motor to be opposite and combining the gear arrangement, the arrangement of the polishing sand belt and the round bar specimen, the polishing sand belt and the round bar specimen are polished efficiently by using the frictional force. By setting a tensioning wheel to adjust the tension of the polishing sand belt, the polishing effect is guaranteed;

[0020] 5. By setting an electric telescopic rod to drive the protective cover to move horizontally, when the round bar specimen needs to be polished, the two protective covers cover the whole device to ensure the safety of the polishing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of a surface polishing device for a round bar specimen proposed by the present utility model;

[0022] Figure 2 It is a schematic diagram of the partial structure of a surface polishing device for a round bar specimen proposed by the present utility model;

[0023] Figure 3 It is a schematic diagram of the main structure of a surface polishing device for a round bar specimen proposed by the present utility model;

[0024] Figure 4 It is a schematic diagram of the main exploded structure of a surface polishing device for a round bar specimen proposed by the present utility model;

[0025] Figure 5 It is a schematic diagram of the polishing part structure of a surface polishing device for a round bar specimen proposed by the present utility model;

[0026] Figure 6 It is a schematic diagram of the top structure of the centering part of a surface polishing device for a round bar specimen proposed by the present utility model;

[0027] Figure 7 Schematic diagram of the bottom structure of the centering part of a surface grinding device for round bar specimens proposed by the present utility model.

[0028] In the figure: 1, base; 2, protective cover; 3, first electric telescopic rod; 4, vertical plate; 5, placement plate; 6, pressing plate; 7, second electric telescopic rod; 8, bracket; 9, third electric telescopic rod; 10, support block; 11, accommodating plate; 12, chain; 13, sprocket; 14, L-shaped plate; 15, first driving motor; 16, fixing frame; 17, rotating ejector rod; 18, grinding sand belt; 19, tensioning wheel; 20, round bar specimen; 21, threaded rod; 22, rectangular plate; 23, limiting rod; 24, first belt pulley; 25, second belt pulley; 26, second driving motor; 27, U-shaped frame; 28, three-jaw chuck; 29, gear; 30, driving rib; 31, support column; 32, hollow column. Specific implementation manners

[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0030] Please refer to Figures 1-7 , the present utility model provides a surface grinding device for round bar specimens, including a base 1, a centering part, and a sand belt grinding part for grinding the round bar specimen 20. The centering part includes an accommodating plate 11, a placement plate 5, a hollow column 32, a support column 31, a fixing frame 16, and a pressing plate 6. The accommodating plate 11 is welded to the top outer wall of the base 1 through a support block 10, and an electric telescopic rod three 9 is fixedly connected to the bottom outer wall of the accommodating plate 11. The placement plate 5 is fixed to the output end of the electric telescopic rod three 9 through a pin. The hollow column 32 is movably connected to the inner wall of the through hole opened on the placement plate 5. The top outer wall of the support column 31 is welded with a three-jaw chuck 28. A driving rib 30 is integrally formed on the circumferential outer wall of the support column 31. The bottom outer wall of the support column 31 is movably connected to the top outer wall of the accommodating plate 11. The bottom of the hollow column 32 is provided with a through hole adapted to the outer diameters of the driving rib 30 and the support column 31. The diameter of the support column 31 is less than or equal to the diameter of the round bar specimen 20. The top of the hollow column 32 is fixedly connected with a gear 29, and a plurality of gears 29 are sequentially meshed. The fixing frame 16 is fixed to the top outer wall of the base 1, and an electric telescopic rod two 7 is fixed to the top outer wall of the fixing frame 16. The pressing plate 6 is fixed to the output end of the electric telescopic rod two 7 through a pin. The bottom outer wall of the pressing plate 6 is movably connected with a rotating ejector rod 17. The rotating ejector rod 17 is centered with the center of the three-jaw chuck 28. The diameter of the rotating ejector rod 17 is less than or equal to the diameter of the round bar specimen 20;

[0031] During the process of supporting the bottom of the round bar specimen 20 by the support column 31 and clamping the circumferential outer wall of the round bar specimen 20 by the three-jaw chuck 28, a centering and alignment effect is achieved between the round bar specimen 20 and the support column 31, ensuring that the axes of the support column 31 and the round bar specimen 20 coincide with each other. When the support column 31 and the round bar specimen 20 rotate synchronously, it is possible to prevent the round bar specimen 20 from rotating eccentrically relative to the support column 31. By setting the second electric telescopic rod 7 to drive the pressing plate 6 to move downward, the rotating ejector rod 17 gradually presses against the top of the round bar specimen 20 during the synchronous downward movement, thereby using the rotating ejector rod 17 and the support column 31 to limit the two end faces of the round bar specimen 20, ensuring that during the grinding of the circumferential outer wall of the round bar specimen 20, there are no grinding dead corners, and different positions on the circumferential outer wall of the round bar specimen 20 are fully ground.

[0032] After the centering is completed, the jaws on the three-jaw chuck 28 are disengaged from the circumferential outer wall of the round bar specimen 20, and the three-jaw chuck 28 is driven to move downward by the third electric telescopic rod 9, ensuring that the circumferential outer wall of the round bar specimen 20 is completely exposed to the outside, facilitating the grinding of the circumferential outer wall of the round bar specimen 20 by the abrasive belt grinding part.

[0033] An L-shaped plate 14 is fixed to the top outer wall of the placement plate 5 by bolts, and a first driving motor 15 is fixed to the top outer wall of the L-shaped plate 14 by bolts. A sprocket 13 is fixed to the output end of the first driving motor 15 and the circumferential outer wall of one of the hollow columns 32 by pins, and the two sprockets 13 are driven by a chain 12.

[0034] By setting the first driving motor 15 to drive one of the hollow columns 32 to rotate under the driving action of the sprocket 13 and the chain 12, and using the meshing between adjacent gears 29, multiple hollow columns 32 are driven to rotate synchronously. By setting the driving rib 30, the hollow column 32 drives the support column 31 to rotate during the rotation process, thereby realizing the rotation of the round bar specimen 20, ensuring that the abrasive belt grinding part grinds all parts of the circumferential outer wall of the round bar specimen 20 during the rotation of the round bar specimen 20.

[0035] The abrasive belt grinding part includes a first pulley 24 and a second pulley 25. The first pulley 24 and the second pulley 25 are both rotatably connected to the top outer wall of the placement plate 5. An abrasive belt 18 is movably connected between the first pulley 24, the second pulley 25 and the round bar specimen 20. A bracket 8 is fixed to the top outer wall of the placement plate 5 by bolts, and a second driving motor 26 is fixed to the top outer wall of the bracket 8 by bolts, and the output end of the second driving motor 26 is connected to the top of the first pulley 24 through a coupling.

[0036] The driving pulley 24 is rotated by the driving motor two 26, and the abrasive belt 18 is driven by the driving pulley 24 and the driven pulley 25 to rotate along the circumferential outer wall of a plurality of round bar specimens 20. By Figure 5 cross-setting the round bar specimen 20 and the abrasive belt 18 in such a way that when the rotation direction of the output end of the driving motor two 26 is opposite to the rotation direction of the output end of the driving motor one 15, relative friction is generated between the round bar specimen 20 and the abrasive belt 18, so as to polish the circumferential outer wall of the round bar specimen 20 by using the frictional force.

[0037] A rectangular plate 22 is fixed to the top outer wall of the placing plate 5 by bolts. A threaded rod 21 is rotatably connected to the inner wall of the threaded hole formed on the surface of the rectangular plate 22. One end of the threaded rod 21 is rotatably connected to a U-shaped frame 27. A limiting rod 23 is fixed to the outer wall of one side of the U-shaped frame 27 by a pin. A tension pulley 19 is rotatably connected to the inner wall of the U-shaped frame 27.

[0038] By rotating the threaded rod 21, the tension pulley 19 moves horizontally under the guiding action of the limiting rod 23, so as to adjust the tightness of the abrasive belt 18. At the same time, it is also convenient to disassemble and assemble the abrasive belt 18 from the driving pulley 24 and the driven pulley 25.

[0039] As Figure 1 shown, in order to ensure the safety of polishing; the following supplements are made to this embodiment on the basis of Embodiment 1: A vertical plate 4 is fixed to the top outer wall of the base 1 by bolts. An electric telescopic rod one 3 is fixed to the outer wall of one side of the vertical plate 4 by bolts. The output end of the electric telescopic rod one 3 is fixed to a protective cover 2 by a pin.

[0040] By setting the electric telescopic rod one 3 to drive the protective cover 2 to move horizontally, when it is necessary to polish the round bar specimen 20, the two protective covers 2 cover the whole device, so as to ensure the safety of the polishing process. After the polishing is completed, the electric telescopic rod one 3 is used to drive the protective cover 2 to move outwards.

[0041] When the embodiment of the present application is in use: when it is necessary to polish the round bar specimen 20, first place the round bar specimen 20 on the top of the support column 31, and then use the three-jaw chuck 28 to clamp and center the round bar specimen 20. After clamping, centering between the round bar specimen 20 and the support column 31 is achieved. Then, use the second electric telescopic rod 7 to drive the pressing plate 6 to move downward, so that the rotating ejector rod 17 clamps the top of the round bar specimen 20. The rotating ejector rod 17 and the support column 31 are concentric. Then, disengage the jaws of the three-jaw chuck 28 from the outer circumferential wall of the round bar specimen 20, and use the third electric telescopic rod 9 to drive the placement plate 5 to move downward, so that the three-jaw chuck 28 moves downward along the outer circumferential wall of the round bar specimen 20, exposing the round bar specimen 20 to the outside. Then, place the loose abrasive belt 18 at the height of the outer wall of the round bar specimen 20, and use the tensioning wheel 19 to tension the abrasive belt 18. Then, start the second driving motor 26 and the first driving motor 15, and make their output ends reverse each other, so as to polish between the abrasive belt 18 and the round bar specimen 20 by using friction.

[0042] Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A surface grinding device for a round bar specimen, comprising a base (1), a centering part, and a sand belt grinding part for grinding the round bar specimen (20), characterized in that: The centering part includes a receiving plate (11), a placement plate (5), a hollow column (32), a support column (31), a fixing frame (16) and a pressing plate (6). The receiving plate (11) is welded to the outer wall of the top of the base (1) through a support block (10), and an electric telescopic rod three (9) is fixedly connected to the outer wall of the bottom of the receiving plate (11). The placement plate (5) is fixed to the output end of the electric telescopic rod three (9) through a pin. The hollow column (32) is movably connected to the inner wall of the through hole opened on the placement plate (5), and a three-jaw chuck (28) is welded to the outer wall of the top of the support column (31). A driving rib (30) is integrally formed on the circumferential outer wall of the support column (31), and the outer wall of the bottom of the support column (31) is movably connected to the outer wall of the top of the receiving plate (11). The bottom of the hollow column (32) is provided with a through hole adapted to the outer diameters of the driving rib (30) and the support column (31). The diameter of the support column (31) is less than or equal to the diameter of the round bar specimen (20). The top of the hollow column (32) is fixedly connected with a gear (29), and a plurality of gears (29) are sequentially meshed. The fixing frame (16) is fixed to the outer wall of the top of the base (1), and an electric telescopic rod two (7) is fixed to the outer wall of the top of the fixing frame (16). The pressing plate (6) is fixed to the output end of the electric telescopic rod two (7) through a pin, and a rotating ejector rod (17) is movably connected to the outer wall of the bottom of the pressing plate (6). The rotating ejector rod (17) is centered with the center of the three-jaw chuck (28). The diameter of the rotating ejector rod (17) is less than or equal to the diameter of the round bar specimen (20).

2. The surface grinding device for a round bar specimen according to claim 1, characterized in that: An L-shaped plate (14) is fixed to the outer wall of the top of the placement plate (5), and a driving motor one (15) is fixed to the outer wall of the top of the L-shaped plate (14). Sprockets (13) are fixed to the output end of the driving motor one (15) and the circumferential outer wall of one of the hollow columns (32) through pins, and the two sprockets (13) are driven by a chain (12).

3. The surface grinding device for a round bar specimen according to claim 1, wherein: The abrasive belt grinding part includes a pulley one (24) and a pulley two (25). The pulley one (24) and the pulley two (25) are both movably connected to the outer wall of the top of the placement plate (5). The same abrasive belt (18) is movably connected between the pulley one (24), the pulley two (25) and the round bar specimen (20).

4. A surface grinding device for a round bar specimen according to claim 1, wherein: A bracket (8) is fixed to the outer wall of the top of the placement plate (5), and a driving motor two (26) is fixed to the outer wall of the top of the bracket (8). The output end of the driving motor two (26) is connected to the top of the pulley one (24) through a coupling.

5. The surface grinding device for a round bar specimen according to claim 1, characterized in that: A rectangular plate (22) is fixed to the outer wall of the top of the placement plate (5). A threaded rod (21) is movably connected to the inner wall of the threaded hole opened on the surface of the rectangular plate (22), and one end of the threaded rod (21) is movably connected to a U-shaped frame (27).

6. The surface grinding device for a round bar specimen according to claim 5, wherein: A limiting rod (23) is fixed to one outer wall of the U-shaped frame (27) through a pin, and a tensioning wheel (19) is movably connected to the inner wall of the U-shaped frame (27).

7. A surface grinding device for a round bar specimen according to claim 1, characterized in that: A vertical plate (4) is fixed to the outer wall of the top of the base (1), and an electric telescopic rod one (3) is fixed to one outer wall of the vertical plate (4).

8. The surface grinding device for a round bar specimen according to claim 7, wherein: The output end of the electric telescopic rod one (3) is fixed with a protective cover (2) through a pin.

Images