Metallographic grinding and polishing clamping device suitable for columnar sample

Abstract

The utility model discloses a metallographic grinding and polishing clamping device suitable for a columnar sample, belongs to the technical field of metallographic sample processing equipment, and is used for clamping the columnar sample during metallographic grinding and polishing. According to the technical scheme, a frame is a U-shaped plate frame, sliding grooves are formed in the lower portions of the inner walls of the two sides of the frame respectively, the upper edges of the sliding grooves incline forwards and downwards, a wedge block is placed between the sliding grooves in the inner walls of the two sides of the frame, the wedge block is in sliding fit with the sliding grooves, and a pressing plate is placed between the upper surface of the bottom face of the frame and the bottom face of the wedge block. A plurality of V-shaped grooves arranged in parallel are formed in the lower bottom face of the pressing plate, opposite rotating shaft installation holes penetrating through the side walls are formed in the rear portions of the two side walls of the frame respectively, the two ends of the rotating shaft are installed in the rotating shaft installation holes respectively, the rotating shaft is sleeved with an eccentric hole of the eccentric wheel, and the front end of the outer circumferential face of the eccentric wheel makes contact with the rear end face of the wedge block in an opposite mode. The metallographic specimen clamping device is simple in structure, convenient to use, capable of stably clamping a columnar metallographic specimen, capable of being repeatedly used and convenient for electrolytic polishing.

Description

Technical Field

[0001] The utility model relates to a clamping device for metallographic grinding and polishing of columnar specimens, belonging to the technical field of metallographic specimen processing equipment. Background Technique

[0002] As an important tool for studying and evaluating the microstructure of materials, metallographic specimens are widely used in industrial production and scientific research in fields such as modern mechanical manufacturing, steel production, and non-ferrous metal metallurgy. During the preparation of metallographic specimens, due to the shape and size limitations of the specimens, traditional hand-held grinding and polishing methods often face difficulties in operation and low efficiency. Currently, the method of embedding and clamping specimens has become a more common solution.

[0003] However, the method of embedding and clamping specimens also has certain deficiencies. Although the embedding method has its unique advantages in the preparation of metallographic specimens, the process is relatively time-consuming, and once the specimen is embedded, it becomes difficult to take out and reuse. In addition, since the cold embedding method is non-conductive, electrolytic polishing cannot be achieved, while the hot embedding method may have a greater impact on heat-sensitive materials. As for the traditional clamping method, its clamping tool usually consists of two simple clamping plates and is only applicable to specimens with regular shapes. For irregularly shaped columnar specimens, such as small round bars, triangles, etc., this clamping method is difficult to fix in actual operation and cannot achieve simultaneous grinding and polishing of multiple specimens.

[0004] Therefore, it is very necessary to improve the existing embedding method and clamping method. Content of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a metallographic grinding and polishing clamping device suitable for columnar specimens. This clamping device can stably clamp columnar metallographic specimens, can be reused, is convenient for electrolytic polishing, is easy to process, manufacture, repair and maintain, has a low manufacturing cost, can improve the preparation efficiency, and ensure the accuracy of the analysis and evaluation of the microstructure properties of materials.

[0006] The technical solution to solve the above technical problem is:

[0007] A metallographic grinding and polishing clamping device suitable for columnar specimens, which includes a frame, a wedge block, a pressing plate, a rotating shaft, and an eccentric wheel. The frame is a U-shaped plate frame. There are sliding grooves at the lower parts of the inner walls on both sides of the frame. The two ends of the sliding grooves are open at the front and rear ends of the inner wall of the frame. The upper edge of the sliding groove is inclined forward and downward. The wedge block is a cuboid and is placed between the sliding grooves on the inner walls on both sides of the frame. The two sides of the wedge block are in sliding fit with the sliding grooves respectively. The pressing plate is a flat plate and is placed between the upper surface of the bottom surface of the frame and the bottom surface of the wedge block. The bottom surface of the wedge block is in sliding fit with the upper surface of the pressing plate. There are multiple parallel V-shaped grooves on the lower bottom surface of the pressing plate. The V-shaped grooves are along the length direction of the frame. There are opposite rotating shaft mounting holes penetrating the side walls at the rear parts of the two side walls of the frame. One of the rotating shaft mounting holes is a threaded hole, and the other rotating shaft mounting hole is a through hole. The rotating shaft is a cylinder. One end of the rotating shaft has an external thread meshing with the threaded hole on the side wall of the frame. The other end of the rotating shaft is in rotational fit with the through hole on the side wall of the frame. There is a cross slot on the end face of the rotating shaft in the through hole. The eccentric wheel is a cylinder. The eccentric hole of the eccentric wheel is sleeved on the rotating shaft between the two side walls of the frame. The front end of the outer circumferential surface of the eccentric wheel is in relative contact with the rear end face of the wedge block.

[0008] For the above-mentioned metallographic grinding and polishing clamping device suitable for columnar specimens, the length of the cuboid of the wedge block is less than the length of the frame. The width of the cuboid of the wedge block matches the distance between the bottom surfaces of the sliding grooves on the inner walls on both sides of the frame. The upper top surface of the wedge block is a plane inclined forward and downward. The inclination angle of the upper top surface of the wedge block matches the inclination angle of the upper edge of the sliding grooves on the inner walls on both sides of the frame.

[0009] For the above-mentioned metallographic grinding and polishing clamping device suitable for columnar specimens, both the surface of the rotating shaft and the eccentric hole of the eccentric wheel are smooth surfaces. The eccentric hole of the eccentric wheel is in rotational fit with the rotating shaft.

[0010] For the above-mentioned metallographic grinding and polishing clamping device suitable for columnar specimens, the width and depth of the V-shaped grooves on the pressing plate match the diameter of the specimens to be clamped. The number of V-shaped grooves matches the number of specimens to be clamped.

[0011] The beneficial effects of the present utility model are as follows:

[0012] The two inner walls of the frame of the present utility model have inclined sliding grooves. The upper top surface of the wedge block is inclined and embedded in the sliding grooves. The eccentric wheel is sleeved on the rotating shaft and can rotate. When the eccentric wheel rotates, it can use different curvature radii to push the wedge block to slide along the sliding grooves. The wedge block presses the pressing plate below during sliding, and the pressing plate fixes the specimens to be clamped. Different opening diameters and different numbers of V-shaped grooves can be set on the lower bottom surface of the pressing plate according to the size and number of the specimens to be clamped, meeting the requirements of grinding multiple specimens at one time.

[0013] The utility model has a simple structure and is convenient to use. It can stably clamp columnar metallographic specimens, can be reused, is convenient for electrolytic polishing, is easy to process, manufacture, maintain and repair, has a low manufacturing cost, can improve the preparation efficiency, and ensure the accuracy of the analysis and evaluation of the microstructure properties of materials. Brief Description of the Drawings

[0014] Figure 1 is a schematic structural diagram of the utility model;

[0015] Figure 2 is a schematic structural diagram of the frame;

[0016] Figure 3 is a schematic structural diagram of the wedge block;

[0017] Figure 4 is a schematic structural diagram of the pressing plate;

[0018] Figure 5 is a schematic structural diagram of the rotating shaft;

[0019] Figure 6 is a schematic structural diagram of the eccentric wheel;

[0020] Figure 7 is Figure 1 the front view of;

[0021] Figure 8 is Figure 7 the A-A cross-sectional view of;

[0022] Figure 9 is a schematic diagram of the use state of the utility model.

[0023] The marks in the figure are as follows: frame 1, wedge block 2, pressing plate 3, rotating shaft 4, eccentric wheel 5, sliding groove 6, V-shaped groove 7, threaded hole 8, through hole 9, external thread 10, slotted hole 11, eccentric hole 12, specimen 13. Detailed Description of the Preferred Embodiments

[0024] The utility model is composed of a frame 1, a wedge block 2, a pressing plate 3, a rotating shaft 4, and an eccentric wheel 5.

[0025] Figure 1 , 2 , 8 show that the frame 1 is a U-shaped plate frame. The lower parts of the inner walls on both sides of the frame 1 are respectively provided with sliding grooves 6. The two ends of the sliding grooves 6 are open at the front and rear ends of the inner wall of the frame 1. The upper edge of the sliding grooves 6 is inclined forward and downward. The wedge block 2 and the pressing plate 3 are placed in the frame 1, and the sliding grooves 6 restrict the upper ends on both sides of the wedge block 2 and the pressing plate 3.

[0026] Figure 1 , 2, As shown in Fig. 8, there are rotating shaft mounting holes penetrating the side walls at the rear parts of the two side walls of the frame 1. The rotating shaft mounting holes on the two side walls are opposite to each other. The rotating shaft mounting hole on one side is a threaded hole 8, and the rotating shaft mounting hole on the other side is a through hole 9. The two ends of the rotating shaft 4 are respectively installed and connected with the rotating shaft mounting holes on the two side walls of the frame 1.

[0027] Figure 1 , 3 , As shown in Fig. 8, the wedge block 2 is a cuboid. The length of the cuboid of the wedge block 2 is less than the length of the frame 1. The width of the cuboid of the wedge block 2 is matched with the distance between the bottom surfaces of the sliding grooves 6 on the inner walls of the two sides of the frame 1. The upper top surface of the wedge block 2 is a plane inclined forward and downward. The inclination angle of the upper top surface of the wedge block 2 is matched with the inclination angle of the upper edges of the sliding grooves 6 on the inner walls of the two sides of the frame 1. The wedge block 2 is placed between the sliding grooves 6 on the inner walls of the two sides of the frame 1. The two sides of the wedge block 2 are in sliding fit with the sliding grooves 6 respectively. The bottom surface of the wedge block 2 is pressed against the pressing plate 3.

[0028] Figure 1 , 4 , As shown in Fig. 8, the pressing plate 3 is a flat plate. The pressing plate 3 is placed between the upper surface of the bottom surface of the frame 1 and the bottom surface of the wedge block 2. The bottom surface of the wedge block 2 is in sliding fit with the upper surface of the pressing plate 3. There are a plurality of V-shaped grooves 7 arranged in parallel on the lower bottom surface of the pressing plate 3. The V-shaped grooves 7 are along the length direction of the frame 1. The width and depth of the V-shaped grooves 7 on the pressing plate 3 are matched with the diameter of the specimen 13 to be clamped. The number of the V-shaped grooves 7 is matched with the number of the specimens 13 to be clamped. The lower bottom surface of the pressing plate 3 can be provided with V-shaped grooves 7 with different opening diameters and different numbers according to the size and number of the specimens 13 to be clamped, etc., to meet the requirements of grinding multiple specimens 13 at one time.

[0029] Figure 1 , 5 , As shown in Fig. 8, the rotating shaft 4 is a cylinder. The diameter of the rotating shaft 4 is matched with the diameter of the rotating shaft mounting holes on the two side walls of the frame 1. One end of the rotating shaft 4 has an external thread 10 meshing with the threaded hole 8 on the side wall of the frame 1. The other end of the rotating shaft 4 is located in the through hole 9 on the side wall of the frame 1. There is a cross slot 11 on the end face of the rotating shaft 4 in the through hole 9 for rotating the rotating shaft 4.

[0030] Figure 1 , 6As shown in FIGS. 8, the eccentric wheel 5 is a cylinder. The eccentric hole 12 of the eccentric wheel 5 is sleeved on the rotating shaft 4 between the two side walls of the frame 1. The front end of the outer circumferential surface of the eccentric wheel 5 is in relative contact with the rear end surface of the wedge block 1. The surfaces of the rotating shaft 4 and the eccentric hole 12 of the eccentric wheel 5 are both smooth surfaces. The eccentric hole 12 of the eccentric wheel 5 and the rotating shaft 4 are in rotational fit, and the eccentric wheel 5 can rotate around the rotating shaft 4 through the eccentric hole 12. During use, the eccentric wheel 5 can be directly rotated by hand to press the wedge block 2. Since the clamping force required to clamp the specimen 13 is not large, and due to the existence of the wedge-shaped structure of the wedge block 2, a very small force in the horizontal direction can press the wedge block 2 tightly. Therefore, the specimen 13 can be clamped manually completely.

[0031] Figure 9 As shown, the working process of the present invention is as follows:

[0032] The wedge block 2 and the pressure plate 3 are respectively placed in the sliding groove 6 of the frame 1. The bottom surface of the wedge block 2 presses on the upper surface of the pressure plate 3; the eccentric wheel 5 is first placed between the two side walls of the sliding groove 6 of the frame 1, and the eccentric hole 12 is aligned with the threaded hole 8 and the through hole 9; the external thread 10 of the rotating shaft 4 passes through the through hole 9 and the eccentric hole 12 in sequence and is screwed into the threaded hole 8.

[0033] One or more specimens 13 are placed in the V-shaped groove 7 on the lower bottom surface of the pressure plate 3;

[0034] The eccentric wheel 5 is rotated manually. The eccentric wheel 5 pushes the wedge block 2 to move along the sliding groove 6, so that the V-shaped groove 7 of the pressure plate 3 presses the specimen 13 tightly;

[0035] Operations such as metallographic sample preparation and observation are carried out;

[0036] The eccentric wheel 5 is rotated in the reverse direction, and the clamped specimen 13 can be loosened;

[0037] Continue to repeat the above steps, and the sample preparation can be repeated.

[0038] An embodiment of the present invention is as follows:

[0039] The length of the frame 1 is 0 mm, the width is 30 mm, the height is 30 mm, the thickness of the plate frame is 5 mm, the depth of the sliding groove 6 is 3 mm, the front-end height is 8 mm, the rear-end height is 22 mm, (the slope is 25°), and the diameters of the threaded hole 8 and the through hole 9 are 2.5 mm;

[0040] The length of the wedge block 2 is 20 mm, the width is 24 mm, the front-end height is 4 mm, and the rear-end height is 13.3 mm (the slope is 25°);

[0041] The length of the pressure plate 3 is 30 mm, the width is 24 mm, and the thickness is 4 mm;

[0042] The diameter of the rotating shaft 4 is 2.5 mm and the length is 30 mm;

[0043] The diameter of the eccentric wheel 5 is 8 mm, the length is 24 mm, and the diameter of the eccentric hole 12 is 2.5 mm.

Claims

1. A metallographic grinding and polishing clamping device suitable for columnar specimens, characterized in that: The invention comprises a frame (1), a wedge block (2), a pressure plate (3), a rotating shaft (4), and an eccentric wheel (5). The frame (1) is a U-shaped plate frame. The lower parts of the inner walls on both sides of the frame (1) are respectively provided with sliding grooves (6). The two ends of the sliding grooves (6) are open at the front and rear ends of the inner walls of the frame (1). The upper edges of the sliding grooves (6) are inclined forward and downward. The wedge block (2) is a rectangular parallelepiped. The wedge block (2) is placed between the sliding grooves (6) on the inner walls on both sides of the frame (1). The two sides of the wedge block (2) are respectively in sliding fit with the sliding grooves (6). The pressure plate (3) is a flat plate. The pressure plate (3) is placed between the upper surface of the bottom surface of the frame (1) and the bottom surface of the wedge block (2). The bottom surface of the wedge block (2) is in sliding fit with the upper surface of the pressure plate (3). The lower bottom surface of the pressure plate (3) has a plurality of V-shaped grooves arranged in parallel. (7), the V-shaped groove (7) is along the length direction of the frame (1), and the rear parts of the two side walls of the frame (1) are respectively provided with shaft mounting holes that penetrate the side walls opposite to each other, the shaft mounting hole on one side is a threaded hole (8), and the shaft mounting hole on the other side is a through hole (9), the shaft (4) is a cylinder, one end of the shaft (4) has an external thread (10) that meshes with the threaded hole (8) on the side wall of the frame (1), and the other end of the shaft (4) is rotatably matched with the through hole (9) on the side wall of the frame (1), and a slot (11) is provided on the end surface of the shaft (4) in the through hole (9), the eccentric wheel (5) is a cylinder, and the eccentric hole (12) of the eccentric wheel (5) is sleeved on the shaft (4) between the two side walls of the frame (1), and the front end of the outer circumferential surface of the eccentric wheel (5) is in relative contact with the rear end surface of the wedge block (2).

2. The metallographic grinding and polishing clamping device suitable for columnar specimens according to claim 1 is characterized in that: The rectangular length of the wedge block (2) is smaller than the length of the frame (1), the rectangular width of the wedge block (2) matches the distance between the bottom surfaces of the sliding grooves (6) on the inner walls on both sides of the frame (1), the upper top surface of the wedge block (2) is a plane inclined forward and downward, and the inclination angle of the upper top surface of the wedge block (2) matches the inclination angle of the upper edge of the sliding grooves (6) on the inner walls on both sides of the frame (1).

3. The metallographic grinding and polishing clamping device suitable for columnar specimens according to claim 1 is characterized in that: The surface of the rotating shaft (4) and the eccentric hole (12) of the eccentric wheel (5) are both smooth surfaces, and the eccentric hole (12) of the eccentric wheel (5) and the rotating shaft (4) are in rotational cooperation.

4. The metallographic grinding and polishing clamping device for columnar specimens according to claim 1 is characterized in that: The width and depth of the V-shaped groove (7) of the pressing plate (3) match the diameter of the sample (13) to be clamped, and the number of the V-shaped grooves (7) matches the number of the samples (13) to be clamped.

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