A copper sheet polishing device for aviation fuel corrosion testing

Abstract

A copper sheet grinding device for aviation fuel corrosion testing, belonging to the field of aviation fuel testing technology, addresses the problem of low efficiency in manual grinding. It includes a fixed clamping block and a movable clamping block. The fixed clamping block has two guide post assemblies, and the movable clamping block has an adjusting screw hole and two guide holes. The adjusting screw passes through the fixed clamping block and is threaded into the adjusting screw hole. The two guide posts and the two guide holes are inserted and slidably engaged. A wide clamping opening and a narrow clamping opening are formed between the fixed and movable clamping blocks. The depth of the wide clamping opening is less than the thickness of the copper sheet, and the sum of the depths of the narrow and wide clamping openings is less than the width of the copper sheet. By clamping the copper sheet with either the wide or narrow clamping opening and grinding it with a belt sander, work efficiency is improved, solving the problem of high labor and time costs associated with manual grinding of copper sheets. It also avoids the safety hazards of hand injuries caused by directly holding the copper sheet while grinding on a belt sander.

Description

Technical Field

[0001] This utility model belongs to the field of aviation fuel testing technology, and in particular relates to a copper sheet polishing device for aviation fuel corrosion testing. Background Technology

[0002] Copper strip corrosion testing is a qualitative method for determining the corrosiveness of oil products. It is primarily used to detect the corrosiveness of active sulfides and elemental sulfur in oil to metals. The principle involves immersing a standard-sized, polished copper strip into the oil sample and maintaining it at a specific temperature (e.g., 100°C) for a specified time (usually 2 hours). The corrosion level is assessed by observing the color change on the copper strip surface using a colorimetric method. It is an important test for evaluating the degree of corrosion of engine metal components by aviation fuel.

[0003] Currently, the industry primarily uses manual methods to polish the copper sheets used in corrosion tests. During polishing, silicon carbide or alumina (corundum) sandpaper is placed on a flat surface and moistened with kerosene or detergent. The copper sheet is then pressed down to rub against the sandpaper. Manual polishing is inefficient and costly in terms of labor and time. Using belt sanders or similar tools is problematic because the small size of the copper sheets makes them difficult to polish smoothly by hand, and also poses a safety hazard of hand injury. Utility Model Content

[0004] The purpose of this invention is to provide a grinding device for copper sheets used in aviation fuel corrosion testing, thereby solving the problem of low efficiency in manual grinding. The technical solution adopted by this invention is as follows:

[0005] A copper sheet polishing device for aviation fuel corrosion testing includes a handle, a fixed clamping block, and a movable clamping block. The fixed clamping block has a first end face, a third end face, and a fifth end face arranged sequentially from top to bottom on the side facing the movable clamping block. The third end face protrudes beyond the first end face, and the fifth end face protrudes beyond the third end face. The first, third, and fifth end faces form mutually parallel stepped surfaces. The movable clamping block has a second end face, a fourth end face, and a sixth end face arranged sequentially from top to bottom on the side facing the fixed clamping block. The fourth end face protrudes beyond the second end face, and the sixth end face protrudes beyond the fourth end face. The surfaces form mutually parallel stepped surfaces. The fixed clamping block is provided with two guide post groups, both of which are perpendicular to the fifth end face. The movable clamping block is provided with an adjusting screw hole and two guide light holes. The adjusting screw passes through the fixed clamping block and is threadedly connected to the adjusting screw hole. The two guide posts and the two guide light holes are inserted and slidably engaged in a one-to-one correspondence. The fixed clamping block is connected to the handle. A wide clamping opening is formed between the first end face and the second end face. The depth of the wide clamping opening is less than the thickness of the copper sheet. A narrow clamping opening is formed between the third end face and the fourth end face. The sum of the depth of the narrow clamping opening and the depth of the wide clamping opening is less than the width of the copper sheet.

[0006] Furthermore, a first vertical groove is provided on the third end face, and a second vertical groove is provided on the fourth end face. Both the first and second vertical grooves are adapted to the thickness of the copper sheet, and the first and second vertical grooves are arranged opposite to each other.

[0007] Furthermore, the end of the adjusting screw away from the movable clamp is provided with a gripping shoulder, and the outer periphery of the gripping shoulder is provided with anti-slip knurling.

[0008] Furthermore, it also includes three plunger balls, and three limiting screw holes are provided on the upper end face of the movable clamping block. The three limiting screw holes are distributed in a triangle, and the three plunger balls are threadedly connected to the three limiting screw holes one by one.

[0009] Furthermore, a first countersunk hole is provided on the fifth end face, and a second countersunk hole is provided on the sixth end face. A stop spring is sleeved on the adjusting screw, and the two ends of the stop spring abut against the bottom surfaces of the first and second countersunk holes respectively.

[0010] Furthermore, a back-tightening nut is threaded onto the adjusting screw. When the fixed clamping block and the movable clamping block clamp the copper sheet, the back-tightening nut abuts against the movable clamping block for back-tightening.

[0011] Furthermore, the bottom of the fixed clamping block is provided with a seat plate portion that protrudes towards the side of the movable clamping block, and the movable clamping block slides against the upper end surface of the seat plate portion.

[0012] Furthermore, it also includes a ball joint universal connector, through which the fixing block and the handle are connected.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] The upper surface of the fixed clamping block is flush with the upper surface of the movable clamping block. When the copper sheet is clamped in the width direction through the wide clamping opening, the end face of the copper sheet to be polished is parallel and protrudes from the upper surfaces of the fixed and movable clamping blocks. When the copper sheet is clamped in the thickness direction through the narrow clamping opening, the side of the copper sheet to be polished is parallel and protrudes from the upper surfaces of the fixed and movable clamping blocks. By holding the handle, the two ends and two sides of the copper sheet are polished by the belt sander, which improves work efficiency and solves the problem of high labor and time costs associated with manual polishing of copper sheets. The clamping mechanism of this utility model can avoid the safety hazards of hand injury caused by directly holding the copper sheet on the belt sander. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the present invention, which uses a narrow clamping opening to hold a copper sheet.

[0017] Figure 3This is a schematic diagram showing the cooperation between the fixed clamping block and the movable clamping block;

[0018] Figure 4 It is an isometric view of the fixed clamping block;

[0019] Figure 5 It is an isometric view of the movable clamping block;

[0020] Figure 6 It is an isometric view of the adjusting screw;

[0021] Figure 7 This is a schematic diagram of the present invention, which uses a wide clamping opening to hold a copper sheet.

[0022] In the diagram, 1. Handle, 2. Ball joint universal connector, 3. Fixed clamp, 31. First end face, 32. First straight groove, 33. Third end face, 34. Through hole, 35. Fifth end face, 36. Seat plate, 37. First countersunk hole, 4. Movable clamp, 41. Limit screw hole, 42. Second end face, 43. Second straight groove, 44. Fourth end face, 45. Guide hole, 46. Sixth end face, 47. Second countersunk hole, 48. Adjusting screw hole, 5. Adjusting screw, 51. Grip shoulder, 6. Plunger ball, 7. Copper sheet, 8. Stop spring. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the present utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the present utility model.

[0024] The connections mentioned in this utility model are divided into fixed connections and detachable connections. Fixed connections, also known as non-detachable connections, include but are not limited to conventional fixed connection methods such as folded connections, riveted connections, adhesive connections, and welded connections. Detachable connections include but are not limited to conventional disassembly methods such as bolt connections, snap-fit ​​connections, pin connections, and hinge connections. When a specific connection method is not explicitly defined, it is assumed that at least one existing connection method can be found to achieve this function, and those skilled in the art can choose according to their needs. For example, a welded connection can be chosen for a fixed connection, and a bolted connection can be chosen for a detachable connection.

[0025] The present invention will be further described in detail below with reference to the accompanying drawings. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0026] Example: Figures 1 to 7As shown, a copper sheet polishing device for aviation fuel corrosion testing includes a handle 1, a fixed clamping block 3, and a movable clamping block 4. The fixed clamping block 3 has a first end face 31, a third end face 33, and a fifth end face 35 arranged sequentially from top to bottom on the side facing the movable clamping block 4. The third end face 33 protrudes from the first end face 31, and the fifth end face 35 protrudes from the third end face 33. The first end face 31, the third end face 33, and the fifth end face 35 form mutually parallel stepped surfaces. The movable clamping block 4 has a second end face 42, a fourth end face 44, and a sixth end face 46 arranged sequentially from top to bottom on the side facing the fixed clamping block 3. The fourth end face 44 protrudes from the second end face 42, and the sixth end face 46 protrudes from the fourth end face 44. The second end face 42, the fourth end face 44, and the sixth end face 46... Surface 46 forms mutually parallel stepped surfaces. The fixed clamping block 3 is provided with two guide post groups, both of which are perpendicular to the fifth end face 35. The movable clamping block 4 is provided with an adjusting screw hole 48 and two guide light holes 45. The fixed clamping block 3 is provided with a through hole 34. The adjusting screw 5 passes through the through hole 34 through the fixed clamping block 3 and is threadedly connected to the adjusting screw hole 48. The two guide posts and the two guide light holes 45 are inserted and slidably engaged in a one-to-one correspondence. The fixed clamping block 3 is connected to the handle 1. A wide clamping opening is formed between the first end face 31 and the second end face 42. The depth of the wide clamping opening is less than the thickness of the copper sheet 8. A narrow clamping opening is formed between the third end face 33 and the fourth end face 44. The sum of the depth of the narrow clamping opening and the depth of the wide clamping opening is less than the width of the copper sheet 8.

[0027] The upper end face of the fixed clamping block 3 is flush with the upper end face of the movable clamping block 4. When the copper sheet 7 is clamped in the width direction through the wide clamping opening, the end face of the copper sheet 7 to be polished is parallel and protrudes from the upper end faces of the fixed clamping block 3 and the movable clamping block 4. When the copper sheet 7 is clamped in the thickness direction through the narrow clamping opening, the side of the copper sheet 7 to be polished is parallel and protrudes from the upper end faces of the fixed clamping block 3 and the movable clamping block 4. Holding the handle 1, the two end faces and two side faces of the copper sheet 7 are polished by the belt sander, which improves work efficiency and solves the problem of high manpower and time cost of manual polishing of copper sheet 7. Through the clamping of this utility model, the safety hazards of hand injury caused by directly holding the copper sheet 7 on the belt sander can be avoided.

[0028] The third end face 33 has a vertically formed first straight groove 32, and the fourth end face 44 has a vertically formed second straight groove 43. Both the first straight groove 32 and the second straight groove 43 are adapted to the thickness of the copper sheet 7, and the first straight groove 32 and the second straight groove 43 are arranged opposite to each other. When grinding the end edge of the copper sheet 7, when one end of the copper sheet 7 is vertically inserted between the narrow clamping openings, the two sides of the copper sheet 7 are respectively inserted into the first straight groove 32 and the second straight groove 43 and clamped, so that the end edge of the copper sheet 7 to be ground can be ground.

[0029] The end of the adjusting screw 5 away from the movable clamping block 4 is provided with a gripping shoulder 51. The outer periphery of the gripping shoulder 51 is provided with anti-slip knurling. By turning the gripping shoulder 51, the relative position of the fixed clamping block 3 and the movable clamping block 4 can be adjusted. The knurling is used for anti-slip.

[0030] It also includes three plunger balls 6, and three limiting screw holes 41 are provided on the upper end face of the movable clamping block 4. The three limiting screw holes 41 are triangularly distributed, and the three plunger balls 6 are threadedly connected to the three limiting screw holes 41 one by one. When grinding the copper sheet 7, a reference positioning plate is set on one side of the belt sander and the reference positioning plate is parallel to the working surface of the sanding belt. Then, the extension length of the three plunger balls 6 is adjusted according to the distance between the reference positioning plate and the working surface of the sanding belt. When all three plunger balls 6 are in contact with the reference positioning plate, the end face, side or end edge of the copper sheet to be ground held by the fixed clamping block 3 and the movable clamping block 4 abuts against the working end face of the sanding belt. With this setting, the surface of the copper sheet 7 to be ground can be in parallel contact with the working surface of the sanding belt, ensuring that the grinding effect of 7 is flat.

[0031] The fifth end face 35 is provided with a first countersunk hole 37, and the sixth end face 46 is provided with a second countersunk hole 47. A stop spring 8 is sleeved on the adjusting screw 5. The two ends of the stop spring 8 are respectively inserted into the first countersunk hole 37 and the second countersunk hole 47, and abut against the bottom surfaces of the first countersunk hole 37 and the second countersunk hole 47. The second countersunk hole 47 is coaxial with the adjusting screw hole 48, and the first countersunk hole 37 is coaxial with the through hole 34. By applying opposing elastic forces to the fixed clamping block 3 and the movable clamping block 4 through the stop spring 8, the threads of the adjusting screw 5 and the adjusting screw hole 48 can be locked to prevent the threaded fit of the adjusting screw 5 and the adjusting screw hole 48 from loosening.

[0032] The adjusting screw 5 is threaded with a back-tightening nut. When the fixed clamping block 3 and the movable clamping block 4 clamp the copper sheet 7, the back-tightening nut and the movable clamping block 4 abut against each other and tighten, which can also prevent the adjustment screw 5 from loosening in the fit with the adjusting screw hole 48.

[0033] The bottom of the fixed clamping block 3 is provided with a seat plate portion 36 that protrudes towards the movable clamping block 4. The movable clamping block 4 slides against the upper end surface of the seat plate portion 36, and the seat plate portion 36 can support the movable clamping block 4.

[0034] It also includes a ball joint universal connector 2, a fixing clamp 3, and a handle 1 connected by the ball joint universal connector 2. The ball joint universal connector 2 is provided with a set screw to lock the ball head of the ball joint universal connector 2 from rotating. The angle between the handle 1 and the fixing clamp 3 can be adjusted by the ball joint universal connector 2 to accommodate different grip angles.

[0035] The above embodiments are merely illustrative examples of the present utility model and do not limit its scope of protection. Those skilled in the art can make partial changes to it, as long as they do not exceed the spirit and essence of the present utility model, they are all within the scope of protection of the present utility model.

Claims

1. A copper sheet polishing device for aviation fuel corrosion testing, characterized in that: Includes a handle (1), a fixed clamping block (3), and a movable clamping block (4); the fixed clamping block (3) has a first end face (31), a third end face (33), and a fifth end face (35) arranged sequentially from top to bottom on the side facing the movable clamping block (4), the third end face (33) protruding from the first end face (31), the fifth end face (35) protruding from the third end face (33), the first end face (31), the third end face (33), and the fifth end face (35) forming mutually parallel stepped surfaces; the movable clamping block (4) has a second end face (42), a fourth end face (44), and a sixth end face (46) arranged sequentially from top to bottom on the side facing the fixed clamping block (3), the fourth end face (44) protruding from the second end face (42), the sixth end face (46) protruding from the fourth end face (44), the second end face (42), the fourth end face (44), the fifth end face (45), the sixth end face (46), the second end face (42), the fourth end face (45), the fifth end face (46), the fifth end face (45), the fifth end face (45), the fifth end face (45), the fifth end face (46 ... 44) and the sixth end face (46) form mutually parallel stepped surfaces. The fixed clamping block (3) is provided with two guide post groups. Both guide posts are perpendicular to the fifth end face (35). The movable clamping block (4) is provided with an adjusting screw hole (48) and two guide light holes (45). The adjusting screw (5) passes through the fixed clamping block (3) and is threadedly connected to the adjusting screw hole (48). The two guide posts and the two guide light holes (45) are inserted and slidably fitted one-to-one. The fixed clamping block (3) is connected to the handle (1). A wide clamping opening is formed between the first end face (31) and the second end face (42). The depth of the wide clamping opening is less than the thickness of the copper sheet (7). A narrow clamping opening is formed between the third end face (33) and the fourth end face (44). The sum of the depth of the narrow clamping opening and the depth of the wide clamping opening is less than the width of the copper sheet (7).

2. The copper sheet polishing device for aviation fuel corrosion testing according to claim 1, characterized in that: The third end face (33) is provided with a vertically opened first straight groove (32), and the fourth end face (44) is provided with a vertically opened second straight groove (43). The first straight groove (32) and the second straight groove (43) are both adapted to the thickness of the copper sheet (7), and the first straight groove (32) and the second straight groove (43) are arranged opposite to each other.

3. The copper sheet polishing device for aviation fuel corrosion testing according to claim 1, characterized in that: The end of the adjusting screw (5) away from the movable clamp (4) is provided with a gripping shoulder (51), and the outer periphery of the gripping shoulder (51) is provided with anti-slip knurling.

4. The copper sheet polishing device for aviation fuel corrosion testing according to claim 1, characterized in that: It also includes three plunger balls (6), and three limiting screw holes (41) are provided on the upper end surface of the movable clamp (4). The three limiting screw holes (41) are triangularly distributed, and the three plunger balls (6) are threadedly connected to the three limiting screw holes (41) one by one.

5. The copper sheet polishing device for aviation fuel corrosion testing according to claim 1, characterized in that: The fifth end face (35) is provided with a first countersunk hole (37), and the sixth end face (46) is provided with a second countersunk hole (47). A stop spring (8) is sleeved on the adjusting screw (5). The two ends of the stop spring (8) are respectively abutted against the bottom surface of the first countersunk hole (37) and the bottom surface of the second countersunk hole (47).

6. The copper sheet polishing device for aviation fuel corrosion testing according to claim 1, characterized in that: The adjusting screw (5) is threaded with a back-tightening nut. When the fixed clamping block (3) and the movable clamping block (4) clamp the copper sheet 7, the back-tightening nut and the movable clamping block (4) abut against each other and tighten.

7. The copper sheet polishing device for aviation fuel corrosion testing according to claim 1, characterized in that: The bottom of the fixed clamping block (3) is provided with a seat plate portion (36) protruding towards the side of the movable clamping block (4), and the movable clamping block (4) slides against the upper end surface of the seat plate portion (36).

8. A copper sheet polishing device for aviation fuel corrosion testing according to any one of claims 1-7, characterized in that: It also includes a ball joint universal connector (2), a fixing block (3) and a handle (1) connected by the ball joint universal connector (2).

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