A two-hole positioning finishing fixture

Abstract

The utility model relates to the technical field of clamps, and in particular to a two-hole positioning finishing clamp; it comprises a workpiece body to be processed, a support platform and a second door-shaped plate, two positioning through holes are arranged inside the workpiece body to be processed, a support bottom plate is fixedly installed on the bottom of the support platform and the bottom of the second door-shaped plate; a clamping component is movably installed on the top of the second door-shaped plate, a positioning component is slidably installed on the top of the second door-shaped plate, and a first supporting component is fixedly installed on the top of the second door-shaped plate; a first limiting long groove is arranged on the top of the support platform, a connecting long groove is arranged on the inner bottom wall of the first limiting long groove, a height adjustment component is slidably installed inside the connecting long groove, a plurality of threaded grooves are arranged on the left and right sides of the support platform, a limiting component is slidably installed on the outer surface of the support platform, and a second supporting component is fixedly installed on the outer surface of the support platform; the technical problems of poor positioning effect and small scope of application are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of clamps, in particular to a two-hole positioning finishing clamp. Background Art

[0002] A fixture is a device used to fix a workpiece to a correct position for construction or inspection, and is often used in mechanical processing. In the prior art, when fine machining a workpiece with two through holes, the workpiece with two through holes needs to be positioned, and therefore, a fixture capable of positioning the two holes is required. For this purpose, a Chinese patent with publication number CN207873710U discloses a two-hole positioning finishing fixture, including a clamping platform and a workpiece to be processed, a clamping plate is fixed on the top of the clamping platform, a first screw is screwed on the clamping plate, a positioning nut at the left end of the first screw is close to the left side of the clamping plate, the other end of the first screw is inserted into a through hole on the clamping plate and the workpiece to be processed, and the first screw extends out of the right side of the workpiece to be processed, a positioning fixture is provided on the right side of the workpiece to be processed, a positioning hole is provided on the positioning fixture, the first screw is inserted into the inside of the positioning hole, a second screw is also inserted in the positioning hole, the second screw passes through another through hole on the workpiece to be processed, and the second screw extends out of the left side of the workpiece to be processed. The two-hole positioning finishing fixture prevents the workpiece from shaking during processing by positioning and clamping the through hole of the workpiece, thereby ensuring the processing quality of the product.

[0003] However, in this patent, since the workpiece to be processed is fixed on the clamping plate by passing a screw through a through hole on the workpiece to be processed, the workpiece to be processed is clamped and fixed by one side of the clamping plate and the screw head. This will cause uneven force on the workpiece to be processed during fine processing, which may cause the workpiece to be processed to shake, resulting in poor positioning effect. In addition, in this patent, since the height at which the workpiece to be processed is positioned is fixed, when the height of the workpiece to be processed needs to be changed according to usage requirements, the height of the workpiece to be processed cannot be changed according to usage requirements. This makes it impossible to position workpieces of various heights to be processed, thus reducing its scope of application. Utility Model Content

[0004] The utility model provides a two-hole positioning finishing fixture to solve the problems of poor positioning effect and small application range in the prior art, which can improve the positioning effect and expand the application range.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a two-hole positioning finishing fixture, comprising a workpiece body to be processed, a support table and a second door-shaped plate, two positioning through holes are provided inside the workpiece body to be processed, one side of the support table is fixedly installed on one side of the second door-shaped plate, and the bottom of the support table and the bottom of the second door-shaped plate are jointly fixedly installed with a supporting bottom plate; a first trapezoidal long groove is provided on the top of the support table, a second trapezoidal long groove and a third trapezoidal long groove are respectively provided on the top of the second door-shaped plate, a clamping assembly is movably installed on the top of the second door-shaped plate, and the second door A positioning assembly is slidably installed on the top of the door-shaped plate, and a first supporting assembly is fixedly installed on the top of the second door-shaped plate; a first limiting long groove is opened on the top of the supporting platform, a connecting long groove is opened on the inner bottom wall of the first limiting long groove, a second limiting long groove is opened on the left inner wall and the right inner wall of the connecting long groove, a connecting long hole is opened on an inner wall of the connecting long groove, a height adjustment assembly is slidably installed inside the connecting long groove, a plurality of threaded grooves are opened on the left and right sides of the supporting platform, a limiting assembly is slidably installed on the outer surface of the supporting platform, and a second supporting assembly is fixedly installed on the outer surface of the supporting platform.

[0006] Furthermore, the clamping assembly includes a limiting vertical plate, the bottom of the limiting vertical plate is movably mounted on the top of the second door-shaped plate, the bottom of the limiting vertical plate is movably mounted on the top of the support platform, the bottom of the limiting vertical plate is fixedly connected to a first trapezoidal block, the first trapezoidal block is movably mounted inside the first trapezoidal long groove and the second trapezoidal long groove respectively, a convex shaft is rotatably connected inside one side of the limiting vertical plate, one end of the convex shaft is fixedly connected to a threaded shaft, an end of the threaded shaft away from the convex shaft is fixedly connected to a holding column, the outer surface of the holding column is fixedly connected to a limiting ring, the number of limiting vertical plates is two, four limiting columns are fixedly connected to one side of the two limiting vertical plates, the number of limiting columns is eight, four limiting columns are located on the left side of the support platform, and the other four limiting columns are located on the right side of the support platform.

[0007] Furthermore, the positioning assembly includes a first L-shaped rod and a supporting vertical rod, the bottom of one end of the first L-shaped rod and the bottom of the supporting vertical rod are both slidably mounted on the top of the second door-shaped plate, the inner top wall of the other end of the first L-shaped rod is fixedly mounted on the top of the limiting vertical plate, the bottom of the first L-shaped rod is fixedly connected to the second trapezoidal block, the second trapezoidal block is slidably mounted inside the third trapezoidal long groove, the top of the supporting vertical rod is fixedly connected to the supporting plate, and the supporting plate is rotatably connected to the holding column and the limiting ring respectively.

[0008] Furthermore, the first supporting assembly includes a supporting vertical plate, the bottom of the supporting vertical plate is fixedly installed on the top of the second door-shaped plate, the supporting vertical plate is threadedly connected to the threaded shaft, the supporting vertical plate is slidably connected to the first L-shaped rod, one side of the supporting vertical plate is fixedly connected to the second L-shaped rod, the bottom of one end of the second L-shaped rod is fixedly installed on the top of the second door-shaped plate, the second L-shaped rod is slidably connected to the supporting vertical rod, the top of the supporting vertical plate is fixedly connected to the T-shaped plate, and the T-shaped plate is slidably connected to the first L-shaped rod.

[0009] Furthermore, the height adjustment assembly includes a supporting long rod, which is movably installed inside the connecting long slot, and the top of the supporting long rod is fixedly connected to a first door-shaped plate, which is clamped with the main body of the workpiece to be processed, and the left and right sides of the supporting long rod are fixedly connected to a limiting long rod, which is slidably installed inside the second limiting long slot, and one side of the limiting long rod is fixedly connected to a connecting long plate, which is slidably installed inside the connecting long hole.

[0010] Furthermore, the limiting assembly includes a second circular plate, which is slidably mounted on the outer surface of the support platform, and is fixedly connected to the connecting long plate, and a screw is threadedly connected to the inner body of the second circular plate.

[0011] Furthermore, the second supporting assembly includes two first circular plates, both of which are fixedly mounted on the outer surface of the supporting platform, a supporting column is fixedly connected between the two first circular plates, and the supporting column is slidably connected to the second circular plates.

[0012] The working principle and use principle of the utility model are as follows: in the process of using the device, the device is supported by the second door-shaped plate and the supporting bottom plate, and both sides of the main body of the workpiece to be processed are clamped by the clamping component, the positioning component and the first supporting component, so as to avoid uneven force on the main body of the workpiece to be processed due to the clamping one side when the workpiece to be processed is finely processed, avoid shaking of the main body of the workpiece to be processed due to uneven force, and avoid poor positioning effect of the device due to shaking of the main body of the workpiece to be processed, and in the process of using the device, through the height adjustment component, the limit component and the second supporting component, when the height of the main body of the workpiece to be processed needs to be changed according to the use requirements, the height of the main body of the workpiece to be processed can be changed according to the use requirements, so that the device is suitable for positioning of workpieces of various heights.

[0013] The beneficial technical effects of the utility model are:

[0014] By setting the second door-shaped plate and the supporting bottom plate, the device can be supported, and by setting the clamping component, the positioning component and the first supporting component, both sides of the main body of the workpiece to be processed can be clamped, so that the main body of the workpiece to be processed can avoid uneven force due to the clamped side when being fine-machined, and the main body of the workpiece to be processed can avoid shaking due to uneven force, so that the device can avoid poor positioning effect due to shaking of the main body of the workpiece to be processed, so that the positioning effect of the device can be improved, and by setting the height adjustment component, the limit component and the second supporting component, when the height of the main body of the workpiece to be processed needs to be changed according to the use requirements, the height of the main body of the workpiece to be processed can be changed according to the use requirements, so that the device can be suitable for the positioning of workpieces of various heights to be processed, so that the scope of application of the device can be expanded. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Other features, objectives and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings.

[0016] Figure 1 It is a frontal stereoscopic schematic diagram of the utility model.

[0017] Figure 2 It is a three-dimensional schematic diagram of the supporting vertical plate of the utility model.

[0018] Figure 3 It is a three-dimensional schematic diagram of the first L-shaped rod of the utility model.

[0019] Figure 4 It is a three-dimensional schematic diagram of the support platform of the utility model.

[0020] Figure 5 It is a three-dimensional schematic diagram of the position-limiting vertical plate of the utility model.

[0021] Figure 6 It is a side sectional schematic diagram of the utility model.

[0022] Explanation of the reference numerals in the figure: 1. first L-shaped rod; 2. holding column; 3. support plate; 4. T-shaped plate; 5. threaded shaft; 6. limit vertical plate; 7. main body of the workpiece to be processed; 8. supporting long rod; 9. first door-shaped plate; 10. limit column; 11. first limit long groove; 12. supporting platform; 13. first trapezoidal block; 14. third trapezoidal long groove; 15. second trapezoidal block; 16. second door-shaped plate; 17. supporting bottom plate; 18. Support column; 19, first trapezoidal long groove; 20, connecting long plate; 21, connecting long hole; 22, first circular plate; 23, second circular plate; 24, threaded groove; 25, screw; 26, supporting vertical plate; 27, second L-shaped rod; 28, supporting vertical rod; 29, second trapezoidal long groove; 30, positioning through hole; 31, limiting long rod; 32, convex shaft; 33, limiting ring; 34, second limiting long groove; 35, connecting long groove. DETAILED DESCRIPTION

[0023] The two-hole positioning finishing fixture of the utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0024] like Figures 1 to 6As shown: a two-hole positioning finishing fixture, including a workpiece body 7 to be processed, a support table 12, a second door-shaped plate 16, a limit plate 6, a first L-shaped rod 1, a support rod 28 and a support plate 26, the interior of the workpiece body 7 to be processed is provided with two positioning through holes 30, the bottom of the support table 12 and the bottom of the second door-shaped plate 16 are jointly fixedly installed with a support bottom plate 17, the top of the support table 12 is provided with a first trapezoidal long groove 19, the top of the second door-shaped plate 16 is respectively provided with a second trapezoidal long groove 29 and a third trapezoidal long groove 14, the limit plate A first trapezoidal block 13 is fixedly connected to the bottom of the vertical plate 6, a convex shaft 32 is rotatably connected to the inside of one side of the limiting vertical plate 6, one end of the convex shaft 32 is fixedly connected to a threaded shaft 5, and one end of the threaded shaft 5 away from the convex shaft 32 is fixedly connected to a holding column 2, the number of the holding columns 2 is two, and a limiting ring 33 is fixedly connected to the outer surface of the holding column 2. There are two limiting vertical plates 6, and four limiting columns 10 are fixedly connected to one side of the two limiting vertical plates 6. The number of limiting columns 10 is eight, and the four limiting columns 10 are located on the left side of the support platform 12. Four limiting columns 10 are located on the right side of the support platform 12, and the limiting columns 10 are movably connected to the positioning through holes 30. The bottom of the first L-shaped rod 1 is fixedly connected to the second trapezoidal block 15, and the top of the supporting vertical rod 28 is fixedly connected to the supporting plate 3. The supporting vertical plate 26 is threadedly connected to the threaded shaft 5, and one side of the supporting vertical plate 26 is fixedly connected to the second L-shaped rod 27, and the top of the supporting vertical plate 26 is fixedly connected to the T-shaped plate 4. The second door-shaped plate 16 and the supporting bottom plate 17 are arranged so that the device can be supported. Through the clamping assembly, the positioning assembly and the first The setting of the supporting component enables the clamping component to clamp the workpiece body 7 to be processed, enables the positioning component to position the clamping component, enables the first supporting component to support the clamping component, enables both sides of the workpiece body 7 to be processed to be clamped, and enables the workpiece body 7 to be prevented from being subjected to uneven force due to one side being clamped when being fine-machined, enables the workpiece body 7 to be prevented from shaking due to uneven force, enables the device to avoid poor positioning effect due to shaking of the workpiece body 7 to be processed, and enables the device to improve the positioning effect.

[0025] When in use, the second door-shaped plate 16 and the supporting bottom plate 17 can support the device. When the device is not in use, the main body 7 of the workpiece to be processed is disconnected from the first door-shaped plate 9, one side of the limiting vertical plate 6 is in contact with one side of the supporting vertical plate 26, and the screw 25 is threadedly connected with a thread groove 24. When processing a workpiece to be processed with two through holes, when it is necessary to use the device to position the workpiece to be processed with two through holes, the main body 7 of the workpiece to be processed is moved so that the main body 7 of the workpiece to be processed is stuck on the first door-shaped plate 9, and the two limiting columns 10 on the left side of the support platform 12 and the two limiting columns 10 on the right side of the support platform 12 are The two limiting columns 10 correspond to the two positioning through holes 30, so that the center of the workpiece body 7 to be processed corresponds to the center of the first door-shaped plate 9, and the two holding columns 2 are rotated at the same time, so that the holding columns 2 and the limiting ring 33 are rotated along the supporting plate 3, so that one end of the threaded shaft 5 and the convex shaft 32 are rotated along the limiting vertical plate 6, and under the action of the threaded transmission, the limiting vertical plate 6 moves toward the direction close to the workpiece body 7 to be processed, so that the limiting vertical plate 6 slides along the second door-shaped plate 16 and the supporting platform 12 respectively, and the first trapezoidal block 13 slides along the second trapezoidal long groove 29 and the first trapezoidal long groove 19 respectively. The first L-shaped rod 1 slides along the T-shaped plate 4, the second door-shaped plate 16 and the supporting vertical plate 26 respectively, so that the second trapezoidal block 15 slides along the third trapezoidal long groove 14, and the supporting vertical rod 28 slides along the second door-shaped plate 16 and the second L-shaped rod 27 respectively. When the limiting vertical plate 6 moves to the maximum distance in the direction close to the main body 7 of the workpiece to be processed, the limiting vertical plate 6 is disconnected from the second door-shaped plate 16, and the first trapezoidal block 13 is disconnected from the second trapezoidal long groove 29. The main body 7 of the workpiece to be processed is located between the two limiting vertical plates 6 and is clamped by the two limiting vertical plates 6. The two limiting vertical plates 6 located on the left side of the support table 12 are connected to each other. The limit column 10 and the two limit columns 10 located on the right side of the support platform 12 all enter the two positioning through holes 30, stop rotating the two holding columns 2 at the same time, and the device can be used to position the workpiece to be processed with two through holes. In this process, both sides of the workpiece body 7 to be processed can be clamped, so that the workpiece body 7 to be processed can avoid uneven force due to one side being clamped during fine processing, and the workpiece body 7 to be processed can avoid shaking due to uneven force, so that the device can avoid poor positioning effect due to shaking of the workpiece body 7 to be processed, so that the device can improve the positioning effect.

[0026] like Figures 1 to 6As shown: a two-hole positioning finishing fixture, including a workpiece body 7 to be processed, a support platform 12, a second door-shaped plate 16, a second circular plate 23 of a supporting long rod 8 and two first circular plates 22, two positioning through holes 30 are provided inside the workpiece body 7 to be processed, the bottom of the support platform 12 and the bottom of the second door-shaped plate 16 are jointly fixedly installed with a supporting bottom plate 17, a first limiting long groove 11 is provided on the top of the support platform 12, a connecting long groove 35 is provided on the inner bottom wall of the first limiting long groove 11, a second limiting long groove 34 is provided on the left inner side wall and the right inner side wall of the connecting long groove 35, a connecting long hole 21 is provided on an inner side wall of the connecting long groove 35, a plurality of threaded grooves 24 are provided on the left and right sides of the support platform 12, a first door-shaped plate 9 is fixedly connected to the top of the supporting long rod 8, the first door-shaped plate 9 is clamped with the workpiece body 7 to be processed, the first door-shaped plate 9 is movably installed inside the first limiting long groove 11, The left and right sides of the support rod 8 are fixedly connected to the limited long rod 31, and one side of the limited long rod 31 is fixedly connected to the connecting long plate 20. The internal threaded connection of the plate body of the second circular plate 23 is a screw rod 25, and the screw rod 25 is threadedly connected to the thread groove 24. There are two screw rods 25, and a support column 18 is fixedly connected between the two first circular plates 22. Through the arrangement of the height adjustment component, the limiting component and the second supporting component, the height adjustment component can adjust the processing height of the workpiece body 7 to be processed, the limiting component can limit the height adjustment component, and the second supporting component can support the height adjustment component. When the height of the workpiece body 7 to be processed needs to be changed according to the use requirements, the height of the workpiece body 7 to be processed needs to be changed according to the use requirements, so that the device can be suitable for the positioning of workpiece bodies 7 to be processed of various heights, so that the device can expand its scope of application.

[0027] When in use, in the process of using the device to position a workpiece to be processed having two through holes, when the device changes the height of the main body 7 of the workpiece to be processed according to the use requirements, the two holding columns 2 are rotated in the opposite direction at the same time, so that the limiting vertical plate 6 moves in the direction away from the main body 7 of the workpiece to be processed and when the limiting vertical plate 6 moves in the direction away from the main body 7 of the workpiece to be processed to the maximum distance, the two limiting columns 10 located on the left side of the support platform 12 and the two limiting columns 10 located on the right side of the support platform 12 are disconnected from the two positioning through holes 30. The two screw rods 25 are rotated at the same time, so that the screw rod 25 is disconnected from a thread groove 24 and one end of the screw rod 25 is located inside the plate body of the second round plate 23, and the second round plate 23 is moved in the vertical direction, so that the second round plate 23 slides along the support column 18 and the support platform 12 respectively, so that the connecting long plate 20 slides along the connecting long hole 21, the supporting long rod 8 slides along the connecting long groove 35, and the limiting long rod 31 slides along the second limiting long groove 34, so that the first door-shaped plate 9 and the main body 7 of the workpiece to be processed are both moved vertically. When the device changes the positioning of the workpiece to be processed, When the height of the workpiece body 7 to be processed is the required height, and when the other two limiting columns 10 located on the left side of the support platform 12 and the other two limiting columns 10 located on the right side of the support platform 12 correspond to each other with the two positioning through holes 30, and when the screw 25 corresponds to another thread groove 24, the two screws 25 are rotated in opposite directions at the same time, so that the screw 25 is threadedly connected with the other thread groove 24, and the two holding columns 2 are rotated at the same time, so that the limiting vertical plate 6 moves toward the direction close to the workpiece body 7 to be processed, and when the limiting vertical plate 6 moves to the maximum distance in the direction close to the workpiece body 7 to be processed, the two limiting columns 10 located on the left side of the support platform 12 and the two limiting columns 10 located on the right side of the support platform 12 enter the two positioning through holes 30, so that the height of the workpiece body 7 to be processed by the device is changed. At this time, the height of the workpiece body 7 to be processed can be changed according to the use requirements. In this process, the height of the workpiece body 7 to be processed can be changed according to the use requirements, so that the device can be suitable for the positioning of workpiece bodies 7 to be processed of various heights, so that the device can expand its scope of application.

[0028] In this embodiment, the connecting long hole 21 and the connecting long groove 35 are interconnected, the connecting long groove 35 and the first limiting long groove 11 are interconnected, and the diameter of the holding column 2 is greater than the diameter of the threaded shaft 5 .

Claims

1. A two-hole positioning finishing fixture, comprising a workpiece body (7) to be processed, a support platform (12) and a second door-shaped plate (16), wherein two positioning through holes (30) are provided inside the workpiece body (7) to be processed, one side of the support platform (12) is fixedly mounted on one side of the second door-shaped plate (16), and a support bottom plate (17) is fixedly mounted on the bottom of the support platform (12) and the bottom of the second door-shaped plate (16); characterized in that The top of the support platform (12) is provided with a first trapezoidal long groove (19), the top of the second door-shaped plate (16) is provided with a second trapezoidal long groove (29) and a third trapezoidal long groove (14), the top of the second door-shaped plate (16) is movably provided with a clamping assembly, the top of the second door-shaped plate (16) is slidably provided with a positioning assembly, and the top of the second door-shaped plate (16) is fixedly provided with a first supporting assembly; the top of the support platform (12) is provided with a first limiting long groove (11), the first limiting long groove (11) is provided with a The inner bottom wall is provided with a connecting long groove (35), the left inner side wall and the right inner side wall of the connecting long groove (35) are provided with a second limiting long groove (34), an inner side wall of the connecting long groove (35) is provided with a connecting long hole (21), a height adjustment component is slidably mounted inside the connecting long groove (35), a plurality of thread grooves (24) are provided on the left and right sides of the support platform (12), a limiting component is slidably mounted on the outer surface of the support platform (12), and a second support component is fixedly mounted on the outer surface of the support platform (12).

2. A two-hole positioning finishing fixture according to claim 1, characterized in that: The clamping assembly comprises a limiting vertical plate (6), the bottom of the limiting vertical plate (6) is movably mounted on the top of the second door-shaped plate (16), the bottom of the limiting vertical plate (6) is movably mounted on the top of the support platform (12), the bottom of the limiting vertical plate (6) is fixedly connected to a first trapezoidal block (13), the first trapezoidal block (13) is movably mounted inside the first trapezoidal long groove (19) and inside the second trapezoidal long groove (29), and one side of the limiting vertical plate (6) is rotatably connected to a convex shaft (32), the convex shaft (32) One end of the threaded shaft (5) is fixedly connected to the threaded shaft (5), the end of the threaded shaft (5) away from the convex shaft (32) is fixedly connected to the holding column (2), the outer surface of the holding column (2) is fixedly connected to the limiting ring (33), the number of the limiting vertical plates (6) is two, one side of the two limiting vertical plates (6) is fixedly connected to four limiting columns (10), the number of the limiting columns (10) is eight, four limiting columns (10) are located on the left side of the support platform (12), and the other four limiting columns (10) are located on the right side of the support platform (12).

3. A two-hole positioning finishing fixture according to claim 1 or 2, characterized in that: The positioning assembly comprises a first L-shaped rod (1) and a supporting upright rod (28), wherein the bottom of one end of the first L-shaped rod (1) and the bottom of the supporting upright rod (28) are both slidably mounted on the top of the second door-shaped plate (16), the inner top wall of the other end of the first L-shaped rod (1) is fixedly mounted on the top of the limiting upright plate (6), the bottom of the first L-shaped rod (1) is fixedly connected to a second trapezoidal block (15), the second trapezoidal block (15) is slidably mounted inside a third trapezoidal long groove (14), the top of the supporting upright rod (28) is fixedly connected to a supporting plate (3), and the supporting plate (3) is rotatably connected to a holding column (2) and a limiting ring (33) respectively.

4. A two-hole positioning finishing fixture according to claim 1 or 2, characterized in that: The first support assembly comprises a support vertical plate (26), the bottom of the support vertical plate (26) is fixedly mounted on the top of the second door-shaped plate (16), the support vertical plate (26) is threadedly connected to the threaded shaft (5), the support vertical plate (26) is slidably connected to the first L-shaped rod (1), one side of the support vertical plate (26) is fixedly connected to the second L-shaped rod (27), the bottom of one end of the second L-shaped rod (27) is fixedly mounted on the top of the second door-shaped plate (16), the second L-shaped rod (27) is slidably connected to the support vertical rod (28), the top of the support vertical plate (26) is fixedly connected to the T-shaped plate (4), and the T-shaped plate (4) is slidably connected to the first L-shaped rod (1).

5. A two-hole positioning finishing fixture according to claim 3, characterized in that: The first support assembly comprises a support vertical plate (26), the bottom of the support vertical plate (26) is fixedly mounted on the top of the second door-shaped plate (16), the support vertical plate (26) is threadedly connected to the threaded shaft (5), the support vertical plate (26) is slidably connected to the first L-shaped rod (1), one side of the support vertical plate (26) is fixedly connected to the second L-shaped rod (27), the bottom of one end of the second L-shaped rod (27) is fixedly mounted on the top of the second door-shaped plate (16), the second L-shaped rod (27) is slidably connected to the support vertical rod (28), the top of the support vertical plate (26) is fixedly connected to the T-shaped plate (4), and the T-shaped plate (4) is slidably connected to the first L-shaped rod (1).

6. A two-hole positioning finishing fixture according to claim 1, 2 or 5, characterized in that: The height adjustment assembly comprises a supporting long rod (8), the supporting long rod (8) being movably mounted inside the connecting long slot (35), a first door-shaped plate (9) being fixedly connected to the top of the supporting long rod (8), the first door-shaped plate (9) being clamped with the main body (7) of the workpiece to be processed, a limiting long rod (31) being fixedly connected to the left and right sides of the supporting long rod (8), the limiting long rod (31) being slidably mounted inside the second limiting long slot (34), a connecting long plate (20) being fixedly connected to one side of the limiting long rod (31), and the connecting long plate (20) being slidably mounted inside the connecting long hole (21).

7. A two-hole positioning finishing fixture according to claim 4, characterized in that: The height adjustment assembly comprises a supporting long rod (8), the supporting long rod (8) being movably mounted inside the connecting long slot (35), a first door-shaped plate (9) being fixedly connected to the top of the supporting long rod (8), the first door-shaped plate (9) being clamped with the main body (7) of the workpiece to be processed, a limiting long rod (31) being fixedly connected to the left and right sides of the supporting long rod (8), the limiting long rod (31) being slidably mounted inside the second limiting long slot (34), a connecting long plate (20) being fixedly connected to one side of the limiting long rod (31), and the connecting long plate (20) being slidably mounted inside the connecting long hole (21).

8. A two-hole positioning finishing fixture according to claim 1, 2, 5 or 7, characterized in that: The limiting assembly comprises a second circular plate (23), the second circular plate (23) is slidably mounted on the outer surface of the support platform (12), the second circular plate (23) is fixedly connected to the connecting long plate (20), and a screw (25) is threadedly connected inside the plate body of the second circular plate (23).

9. A two-hole positioning finishing fixture according to claim 6, characterized in that: The limiting assembly comprises a second circular plate (23), the second circular plate (23) is slidably mounted on the outer surface of the support platform (12), the second circular plate (23) is fixedly connected to the connecting long plate (20), and a screw (25) is threadedly connected inside the plate body of the second circular plate (23).

10. A two-hole positioning finishing fixture according to claim 1, 2, 5, 7 or 9, characterized in that: The second support assembly comprises two first circular plates (22), the two first circular plates (22) are fixedly mounted on the outer surface of the support platform (12), a support column (18) is fixedly connected between the two first circular plates (22), and the support column (18) is slidably connected to the second circular plate (23).

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