A jig for polishing a test sample

Abstract

A kind of sample polishing fixture, including the pressing plate of rectangular structure, a pair of waist-shaped holes is set in two ends of pressing plate respectively, length direction of waist-shaped hole is parallel with length direction of pressing plate, connecting pin is movably arranged in waist-shaped hole, the lower end of connecting pin located in same end is connected with end clamping plate by screw thread, end clamping plate is located in the lower side of pressing plate, and the thickness of end clamping plate is less than the thickness of sample.The utility model is convenient to clamp and fix sample, when fixing, the two ends of sample are constrained and fixed by end clamping plate, and when fixing, only by rotating holding sleeve, it can be moved downwards by pushing movable plate, and end clamping plate can be moved inwards synchronously in the process of moving, so that it is constrained and positioned to the two ends of sample, and holding sleeve used here provides holding component for polishing operation.

Description

Technical Field

[0001] This utility model relates to the field of intergranular corrosion detection technology, and in particular to a jig for sample grinding. Background Technology

[0002] To improve accuracy in intergranular corrosion testing, the outer oxide layer of elongated samples needs to be removed and the required surface roughness achieved through polishing with sandpaper of varying grits. However, the thinness of the elongated samples presents several challenges for polishing, such as difficulty in holding them and the potential for uneven surfaces. A common method is to glue a convenient gripping block or rod to the back of the sample; however, this method is prone to detachment and makes controlling the smoothness of the polished surface difficult. Utility Model Content

[0003] This utility model provides a fixture for sample grinding, which overcomes the shortcomings of the prior art and solves the problems existing in sample grinding, and has strong practicality.

[0004] In order to achieve the purpose of this utility model, the following technology is proposed to be adopted: A sample grinding fixture includes a rectangular pressure plate with a pair of oblong holes at both ends. The length direction of the oblong holes is parallel to the length direction of the pressure plate. A connecting pin is movably installed in the oblong holes. The lower end of the connecting pin at the same end is threadedly connected to an end clamping plate. The end clamping plate is located on the lower side of the pressure plate, and the thickness of the end clamping plate is less than the thickness of the sample.

[0005] Furthermore, a boss is welded to the upper wall of the pressure plate, and a connecting screw is provided at the upper end of the boss. A holding sleeve is connected to the connecting screw by a thread, and a movable plate is fitted on the connecting screw. Side plates are bent downward at both ends of the movable plate, and actuating pins are connected to the side plates by a thread. An upper movable plate is connected to the upper end of the connecting pin at the same end by a thread. The upper movable plate is located on the upper side of the pressure plate, and vertical plates are formed by bending upward on both sides of the upper movable plate. An oblique hole is opened on the vertical plate, and the upper end of the oblique hole extends inward at an inward angle. The actuating pin passes through the oblique hole.

[0006] Furthermore, a pair of fixed platforms are symmetrically welded to the upper wall of the pressure plate. End screws are fixed to both ends of the fixed platforms. Limiting vertical plates are welded to the fixed platforms and pass through the movable plate. A limiting side plate with a concave structure is sleeved on the end screws on the same side. A pair of grooves are opened on both sides of the pressure plate. The vertical section of the limiting side plate passes through the groove. An inner top nut is threaded onto the end screw. The inner end of the inner top nut abuts against the outer wall of the limiting side plate.

[0007] Furthermore, a baffle is fitted onto the grip sleeve, and a pair of vertical locking plates are welded to the lower wall of the baffle. The outer wall of the vertical locking plates abuts against the inner wall of the limiting vertical plate.

[0008] The advantages of the above technical solution are: This invention facilitates the clamping and fixing of samples. During fixing, the two ends of the sample are constrained and fixed by the end clamps. Furthermore, during fixing, the movable plate can be moved downward by simply rotating the grip sleeve, and the end clamps can move inward synchronously during the movement, thereby constraining and limiting the two ends of the sample. The grip sleeve used here provides a gripping component for the grinding operation.

[0009] This invention also uses a limiting side plate to constrain both sides of the sample to prevent the sample from moving along its width during the grinding process, thereby facilitating the grinding operation. Attached Figure Description

[0010] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will provide a further detailed description of this utility model in conjunction with the accompanying drawings.

[0011] Figure 1 A three-dimensional structure of one embodiment is shown. Figure 1 .

[0012] Figure 2 A three-dimensional structure of one embodiment is shown. Figure 2 . Detailed Implementation

[0013] like Figures 1-2 As shown, a sample grinding fixture includes a rectangular pressure plate 1. A pair of oblong holes 10 are respectively opened at both ends of the pressure plate 1. The length direction of the oblong holes 10 is parallel to the length direction of the pressure plate 1. A connecting pin 2 is movably installed in the oblong holes 10. The lower end of the connecting pin 2 located at the same end is connected to an end clamp 20 by a thread. The end clamp 20 is located on the lower side of the pressure plate 1, and the thickness of the end clamp 20 is less than the thickness of the sample.

[0014] A boss 4 is welded to the upper wall of the pressure plate 1. A connecting screw 40 is provided at the upper end of the boss 4. A holding sleeve 41 is connected to the connecting screw 40 by thread. A movable plate 42 is sleeved on the connecting screw 40. Side plates 43 are bent downward at both ends of the movable plate 42. Actuating pins 44 are connected to the side plates 43 by thread. An upper movable plate 21 is connected to the upper end of the connecting pin 2 at the same end by thread. The upper movable plate 21 is located on the upper side of the pressure plate 1. Vertical plates 22 are formed by bending upward on both sides of the upper movable plate 21. An oblique hole 23 is opened on the vertical plate 22. The upper end of the oblique hole 23 extends inward at an incline. The actuating pin 44 passes through the oblique hole 23. A pair of fixed platforms 3 are symmetrically welded to the upper wall of the pressure plate 1. End screws 30 are fixed to both ends of the fixed platforms 3. Limiting vertical plates 33 are welded on the fixed platforms 3. The limiting vertical plates 33 are inserted through the movable plate 42. A limiting side plate 32 with a concave structure is sleeved on the end screws 30 on the same side. A pair of grooves 11 are opened on both sides of the pressure plate 1. The vertical section of the limiting side plate 32 is inserted into the groove 11. An inner top nut 31 is threadedly connected to the end screws 30. The inner end of the inner top nut 31 abuts against the outer wall of the limiting side plate 32.

[0015] A baffle 45 is fitted on the grip sleeve 41. A pair of vertical locking plates 46 are welded to the lower wall of the baffle 45. The outer wall of the vertical locking plates 46 abuts against the inner wall of the limiting vertical plate 33.

[0016] In this embodiment, the operator places the processed, elongated sample on the table, and then places the pressure plate 1 on the sample. During placement, the limiting side plates 32 are located on both sides of the sample width, while the end clamps 20 are located on both ends of the sample. After placement, the operator rotates the holding sleeve 41. When the holding sleeve 41 rotates, its lower end acts on the movable plate 42, causing the actuating pin 44 on it to act on the inner wall of the oblique hole 23, thereby causing the side plate 43, the upper movable plate 21, and the end clamps 20 to move inward. The operator moves the end clamp 20 so that its inner wall abuts against both ends of the sample. Then, the operator rotates the inner top nut 31 to move the limiting side plate 32 inward and positions the two sides of the sample through the inner wall of the limiting side plate 32. Then, the operator puts the baffle 45 on the holding sleeve 41 and then performs the grinding operation on the lower side of the sample on multiple different grades of sandpaper by holding the holding sleeve 41. The presence of the baffle 45 can avoid the problem of the limiting vertical plate 33 causing scratches to the operator's hands.

[0017] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations of this utility model fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A fixture for grinding samples, characterized in that, The pressure plate (1) has a rectangular structure. A pair of waist-shaped holes (10) are opened at both ends of the pressure plate (1). The length direction of the waist-shaped holes (10) is parallel to the length direction of the pressure plate (1). A connecting pin (2) is movably installed in the waist-shaped holes (10). The lower end of the connecting pin (2) located at the same end is connected to an end clamp (20) by a thread. The end clamp (20) is located on the lower side of the pressure plate (1), and the thickness of the end clamp (20) is less than the thickness of the sample.

2. The sample grinding fixture according to claim 1, characterized in that, A boss (4) is welded to the upper wall of the pressure plate (1). A connecting screw (40) is provided at the upper end of the boss (4). A holding sleeve (41) is connected to the connecting screw (40) by a thread. A movable plate (42) is fitted on the connecting screw (40). Side plates (43) are bent downward at both ends of the movable plate (42). A working pin (44) is connected to the side plate (43) by a thread. An upper moving plate (21) is connected to the upper end of the connecting pin (2) at the same end by a thread. The upper moving plate (21) is located on the upper side of the pressure plate (1). Vertical plates (22) are formed by bending upward on both sides of the upper moving plate (21). An oblique hole (23) is opened on the vertical plate (22). The upper end of the oblique hole (23) extends inward at an inclination. The working pin (44) passes through the oblique hole (23).

3. The sample grinding fixture according to claim 2, characterized in that, A pair of fixed platforms (3) are symmetrically welded to the upper wall of the pressure plate (1). End screws (30) are fixed at both ends of the fixed platforms (3). A limiting vertical plate (33) is welded on the fixed platform (3). The limiting vertical plate (33) passes through the movable plate (42). A limiting side plate (32) with a concave structure is sleeved on the end screw (30) on the same side. A pair of grooves (11) are opened on both sides of the pressure plate (1). The vertical section of the limiting side plate (32) passes through the groove (11). An inner top nut (31) is threaded onto the end screw (30). The inner end of the inner top nut (31) abuts against the outer wall of the limiting side plate (32).

4. The sample grinding fixture according to claim 3, characterized in that, A baffle (45) is fitted on the grip sleeve (41). A pair of vertical clamping plates (46) are welded to the lower wall of the baffle (45). The outer wall of the vertical clamping plate (46) abuts against the inner wall of the limiting vertical plate (33).

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