Fixture for drilling flange plate

Abstract

The utility model provides a clamp for drilling a flange plate, and belongs to the technical field of machinery. The problem that clamping is inconvenient is solved. The clamp for drilling of the flange plate comprises a base and a clamping piece fixedly connected to the top of the base, the clamping piece is provided with a blocky abutting disc and an expansion sleeve fixedly connected to the upper surface of the abutting disc, the lower portion of the base is fixedly connected with a driving air cylinder, and the upper end of a piston rod of the driving air cylinder is fixedly connected with a guide rod assembly. The upper end of the guide rod assembly is located on the inner side of the expansion sleeve, when the guide rod assembly moves downwards, the expansion sleeve can be extruded to expand outwards, the top of the base is further fixedly connected with at least one positioning column, and the positioning columns are close to the edge of the abutting disc. The fixture has the advantages of convenience in clamping, high clamping speed and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of machinery and relates to a fixture for drilling a flange plate. Background Technique

[0002] As Figure 7 and Figure 8 shown is a flange plate 8 which is used on an oil cylinder. It has a connecting part 8a in the shape of a square plate, a first convex part 8b protruding from one side of the connecting part 8a, and a second convex part 8c protruding from the other side of the connecting part 8a. Connecting holes 8a1 are provided at the four vertex positions of the connecting part 8a. A side hole 8b1 is provided on the side part of the first convex part 8b. The second convex part 8c is in a cylindrical shape and two positioning holes 8c1 are provided on the second convex part 8c. The flange plate 8 also has a center hole 8d. Among them, the two positioning holes 8c1 are used for quick positioning when the flange plate 8 is connected to ensure that the side hole 8b1 faces a specified direction. Therefore, in practice, after the flange plate 8 is machined, these two positioning holes 8c1 are drilled on the second convex part 8c of the flange plate 8.

[0003] Before drilling, it is necessary to clamp and position the flange plate 8. At present, the traditional method is to simply use bolts for manual clamping and fixing or disassembly. However, due to the pure manual operation of the staff, there are problems of inconvenient clamping and low efficiency. Content of the Utility Model

[0004] The purpose of the utility model is to solve the above problems existing in the prior art and provide a fixture for drilling a flange plate, which solves the problem of inconvenient clamping.

[0005] The purpose of the utility model can be achieved by the following technical solutions:

[0006] A fixture for drilling a flange plate includes a base and a clamping member fixedly connected to the top of the base. It is characterized in that the clamping member has a block-shaped abutting disk and a expanding sleeve fixedly connected to the upper surface of the abutting disk. A driving cylinder is fixedly connected to the lower part of the base. The upper end of the piston rod of the driving cylinder is fixedly connected with a guide rod assembly. The upper end of the guide rod assembly is located inside the expanding sleeve and can squeeze the expanding sleeve to expand outward when the guide rod assembly moves downward. At least one positioning post is also fixedly connected to the top of the base, and the positioning post is close to the edge of the abutting disk.

[0007] During use, place the flange against the abutment plate of the clamping member with the first convex portion facing downwards and sleeve it over the expanding sleeve through the central hole. At the same time, insert the positioning post into one of the connecting holes of the connecting portion of the flange (in practice, first calculate the distance and relative angle between the center line of this connecting hole to be positioned and the center line of the flange, and then design the position of the positioning post according to the calculated results), thereby realizing the positioning of the flange on this fixture. By inserting the positioning post into one of the connecting holes, the circumferential position of the side hole on the flange is positioned, and at the same time, it can prevent the flange from rotating. After positioning, control the piston rod of the driving cylinder to move downwards so that the guide rod assembly extrudes the expanding sleeve outwards. In this way, the expanding sleeve will expand outwards and tighten against the inner wall of the central hole of the flange, thereby clamping and fixing the flange.

[0008] In this fixture, the circumferential position of the side hole of the flange can be quickly positioned through the setting of the positioning post, and the driving cylinder, the guide rod assembly and the expanding sleeve on the clamping member can realize the quick clamping of the flange after positioning, thus greatly improving the convenience of clamping.

[0009] In the above-mentioned fixture for drilling the flange, an installation plate is abutted against the top of the base, the installation plate and the base are abutted against each other through fasteners, the abutment plate is fixedly connected to the installation plate through fasteners, and the lower end of the positioning post is tightly fitted in the installation plate.

[0010] The clamping member, the positioning post and the installation plate form a small module, which means that in practice, corresponding such small modules can be configured for different specifications of flanges respectively. In this way, when clamping flanges of different specifications, only the corresponding small module needs to be replaced, and there is no need to replace the entire fixture.

[0011] In the above-mentioned fixture for drilling the flange, two mating posts are fixedly connected to the top of the base, and two mating holes are correspondingly arranged on the installation plate, and the two mating posts are respectively located in the two mating holes.

[0012] Through the cooperation of the mating post and the mating hole, the quick positioning of the installation plate and the base before fixed connection can be realized, ensuring the position accuracy of the positioning post on the top of the base after installation.

[0013] In the above-mentioned fixture for drilling the flange, the top of the base has a first through hole, the installation plate has a second through hole, and a cylindrical mating portion is convexly provided in the central region of the bottom of the abutment plate. The mating portion is inserted into the first through hole through the second through hole, and the outer side wall of the mating portion abuts against the hole wall of the second through hole and the hole wall of the first through hole at the same time.

[0014] The fitting part is inserted into the first through hole through the second through hole, and the outer side wall of the fitting part abuts against the hole wall of the second through hole and the hole wall of the first through hole at the same time, so that the fitting part forms positioning between the clamping part and the mounting plate and between the mounting plate and the base at the same time. In this way, there will be no gap in the horizontal direction, and thus the position accuracy of the positioning column can be ensured.

[0015] In the above-mentioned fixture for drilling the flange, the expansion sleeve includes a plurality of arc-shaped petals, each petal is concentrically arranged, and the inner side of each petal has an inclined guide surface I. The outer side of the upper end of the guide rod assembly has a guide surface II, and the lower end of the guide surface II is inclined towards the center line of the guide rod assembly relative to the upper end. The guide surface II abuts against the guide surface I.

[0016] When the piston rod of the driving cylinder drives the guide rod assembly to move downward, the guide surface II of the guide rod assembly will move along the guide surface I and extrude each petal outward, so that the expansion sleeve expands outward and tightens in the central hole of the flange.

[0017] In the above-mentioned fixture for drilling the flange, the guide rod assembly includes a guide rod and a guide block fixedly connected to the upper end of the guide rod along the axis, and the guide surface II is arranged on the outer side of the guide block.

[0018] In the above-mentioned fixture for drilling the flange, the number of the mounting plates is several, and each mounting plate is fixedly connected with the above-mentioned clamping part and positioning column, and the number of the driving cylinders is the same as that of the clamping parts.

[0019] Such a setting can realize the clamping and fixing of multiple flanges on this fixture, improving the production efficiency.

[0020] Compared with the prior art, the fixture for drilling the flange has the following advantages:

[0021] 1. Through the setting of the positioning column, the circumferential position of the side hole of the flange can be quickly positioned, and the setting of the driving cylinder, the guide rod assembly and the expansion sleeve on the clamping part can realize the quick clamping of the flange after positioning, thus greatly improving the convenience of clamping;

[0022] 2. The clamping part, the positioning column and the mounting plate form a small module. In practice, corresponding small modules can be configured for different specifications of flanges. In this way, when clamping flanges of different specifications, only the corresponding small module needs to be replaced, and there is no need to replace the entire fixture. Description of the Drawings

[0023] Figure 1 is a three-dimensional schematic diagram of the fixture for drilling the flange.

[0024] Figure 2 is a cross-sectional view of the fixture for drilling the flange.

[0025] Figure 3 is Figure 2 a partial enlarged view in

[0026] Figure 4 is a three-dimensional schematic view of the clamping member.

[0027] Figure 5 is a three-dimensional schematic view of the flange positioned on the fixture.

[0028] Figure 6 is a front view of the flange positioned on the fixture.

[0029] Figure 7 is a three-dimensional schematic view of the flange.

[0030] Figure 8 is a three-dimensional schematic view of the flange from another angle.

[0031] In the figure, 1 is the base; 1a is the bottom plate; 1b is the top plate; 1b1 is the first through hole; 1c is the side plate; 2 is the clamping member; 2a is the abutting disk; 2b is the expansion sleeve; 2b1 is the lobe body; 2b11 is the first guiding surface; 2c is the mating part; 3 is the driving cylinder; 4 is the guide rod assembly; 4a is the guide rod; 4a1 is the blocking part; 4b is the guide block; 4b1 is the second guiding surface; 4c is the limiting ring; 5 is the positioning post; 6 is the mounting plate; 6a is the mating hole; 6b is the second through hole; 7 is the mating post; 8 is the flange; 8a is the connecting part; 8a1 is the connecting hole; 8b is the first convex part; 8b1 is the side hole; 8c is the second convex part; 8c1 is the positioning hole; 8d is the central hole. Specific Embodiments

[0032] The following are specific embodiments of the present invention and, in conjunction with the accompanying drawings, further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0033] As Figures 1-3 shown, a fixture for drilling a flange includes a base 1 and a clamping member 2 fixedly connected to the top of the base 1. The clamping member 2 has a block-shaped abutting disk 2a and an expansion sleeve 2b fixedly connected to the upper surface of the abutting disk 2a. The abutting disk 2a is in a disk shape, and the expansion sleeve 2b is located in the central area of the upper surface of the abutting disk 2a. A driving cylinder 3 is fixedly connected to the lower part of the base 1, and the upper end of the piston rod of the driving cylinder 3 is fixedly connected to a guide rod assembly 4. The guide rod assembly 4 passes through the abutting disk 2a, and the upper end of the guide rod assembly 4 is located inside the expansion sleeve 2b and can squeeze the expansion sleeve 2b to expand outward when the guide rod assembly 4 moves downward. At least one positioning post 5 is also fixedly connected to the top of the base 1, and the positioning post 5 is close to the edge of the abutting disk 2a.

[0034] Specifically, as Figure 3 andFigure 4 As shown in the figure, the expansion sleeve 2b includes a number of petal bodies 2b1 all in an arc shape. The petal bodies 2b1 are concentrically arranged. The inner sides of the petal bodies 2b1 all have a first inclined guiding surface 2b11. The outer side of the upper end of the guiding rod assembly 4 has a second guiding surface 4b1. The lower end of the second guiding surface 4b1 is inclined towards the center line of the guiding rod assembly 4 relative to the upper end. The second guiding surface 4b1 is in abutment with the first guiding surface 2b11. The guiding rod assembly 4 includes a guiding rod 4a and a guiding block 4b fixedly connected to the upper end of the guiding rod 4a along the axial direction. The second guiding surface 4b1 is arranged on the outer side of the guiding block 4b. The guiding block 4b is sleeved on the upper end of the guiding rod 4a. The upper end of the guiding rod 4a has a blocking portion 4a1. The guiding rod 4a is externally threaded with a limit ring 4c. The guiding block 4b abuts between the blocking portion 4a1 and the limit ring 4c. When the piston rod of the driving cylinder 3 drives the guiding rod assembly 4 to move downward, the second guiding surface 4b1 of the guiding rod assembly 4 will move along the first guiding surface 2b11 and extrude each petal body 2b1 outward, so that the expansion sleeve 2b is tightened in the central hole 8d of the flange 8.

[0035] Further, as Figure 1 , Figure 2 and Figure 3 shown, an installation plate 6 is abutted and arranged on the top of the base 1. The installation plate 6 and the base 1 are fixed by fasteners. The abutting disc 2a and the positioning column 5 are both fixedly connected to the installation plate 6. Among them, the abutting disc 2a and the installation plate 6 are also fixed by fasteners, while the positioning column 5 and the installation plate 6 are in a tight fit. The clamping member 2, the positioning column 5 and the installation plate 6 form a small module, which means that in practice, corresponding such small modules can be configured for different specifications of the flange 8 respectively. In this way, when clamping different specifications of the flange 8, only the corresponding small module needs to be replaced, and there is no need to replace the whole fixture. Two matching columns 7 are fixedly connected to the top of the base 1. Two matching holes 6a are correspondingly arranged on the installation plate 6. The two matching columns 7 are respectively located in the two matching holes 6a. Through the cooperation of the matching column 7 and the matching hole 6a, rapid positioning before the fixed connection of the installation plate 6 and the base 1 can be realized, ensuring the position accuracy of the positioning column 5 on the top of the base 1 after installation. The top of the base 1 has a first through hole 1b1. The installation plate 6 has a second through hole 6b. A cylindrical matching portion 2c is convexly arranged in the central area of the bottom of the abutting disc 2a. The matching portion 2c is inserted into the first through hole 1b1 through the second through hole 6b. The outer side wall of the matching portion 2c abuts against the hole wall of the second through hole 6b and the hole wall of the first through hole 1b1 at the same time.

[0036] In this embodiment, as Figure 1 and Figure 2As shown, the base 1 includes a bottom plate 1a, a top plate 1b, and side plates 1c fixedly connected between the bottom plate 1a and the top plate 1b. The driving cylinder 3 is fixedly connected to the bottom plate 1a, and the mounting plate 6 is fixedly connected to the top plate 1b. Both the top plate 1b and the bottom plate 1a are rectangular plates. The number of mounting plates 6 is several and they are arranged in sequence along the length direction of the top plate 1b. The above-mentioned clamping members 2 and positioning columns 5 are fixedly connected to each mounting plate 6. The number of driving cylinders 3 is the same as that of the clamping members 2. Such a setting can realize the clamping and fixing of multiple flanges 8 on this fixture, improving the production efficiency.

[0037] During use, the flange 8 is abutted against the abutting disc 2a of the clamping member 2 with the first convex portion 8b facing downwards and is sleeved outside the expanding sleeve 2b through the central hole 8d. At the same time, the positioning column 5 penetrates into one of the connecting holes 8a1 of the connecting portion 8a of the flange 8 (in practice, first calculate the distance and relative angle between the center line of this connecting hole 8a1 to be positioned and the center line of the flange 8, and then design the position of the positioning column 5 according to the calculated results). Thus, the positioning of the flange 8 on this fixture is realized, and the positioned state is as Figure 7 and Figure 8 shown. By the positioning column 5 penetrating into one of the connecting holes 8a1, the circumferential position of the side hole 8b1 on the flange 8 is positioned, and at the same time, it can also play a role in preventing the flange 8 from rotating. After positioning, control the piston rod of the driving cylinder 3 to move downwards so that the guide rod assembly 4 extrudes the expanding sleeve 2b outwards. In this way, the expanding sleeve 2b will expand outwards and tighten against the inner wall of the central hole 8d of the flange 8, thereby clamping and fixing the flange 8.

[0038] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A flange drilling fixture, comprising a base (1) and a clamping member (2) fixedly connected to the top of the base (1), a driving cylinder (3) fixedly connected to the lower part of the base (1), characterized in that: The clamping member (2) comprises a block-shaped abutment disk (2a) and an expansion sleeve (2b) fixedly connected to the upper surface of the abutment disk (2a); the upper end of the piston rod of the driving cylinder (3) is fixedly connected to a guide rod assembly (4); the upper end of the guide rod assembly (4) is located on the inner side of the expansion sleeve (2b) and can squeeze the expansion sleeve (2b) to expand outward when the guide rod assembly (4) moves downward; and at least one positioning column (5) is fixedly connected to the top of the base (1); the positioning column (5) is close to the edge of the abutment disk (2a).

2. The flange drilling fixture according to claim 1, characterized in that: The top of the base (1) is fixedly connected to a mounting plate (6) via fasteners, and the abutment plate (2a) and the positioning column (5) are both fixedly connected to the mounting plate (6).

3. The flange drilling fixture according to claim 2, characterized in that: The top of the base (1) is fixedly connected with two matching columns (7), and the mounting plate (6) is correspondingly provided with two matching holes (6a), and the two matching columns (7) are respectively located in the two matching holes (6a).

4. The flange drilling fixture according to claim 2 or 3, characterized in that: The base (1) has a through hole 1 (1b1) on the top, the mounting plate (6) has a through hole 2 (6b), and a cylindrical matching portion (2c) is protruding from the bottom of the abutment plate (2a). The matching portion (2c) is inserted into the through hole 1 (1b1) through the through hole 2 (6b), and the outer wall of the matching portion (2c) is in abutment with the hole wall of the through hole 2 (6b) and the hole wall of the through hole 1 (1b1) at the same time.

5. The flange drilling fixture according to claim 1, characterized in that: The expansion sleeve (2b) comprises a plurality of arc-shaped petals (2b1), each of which is concentrically arranged, and each of which has an inclined guide surface 1 (2b11) on its inner side. The outer side of the upper end of the guide rod assembly (4) has a guide surface 2 (4b1), and the lower end of the guide surface 2 (4b1) is inclined relative to the upper end toward the center line of the guide rod assembly (4), and the guide surface 2 (4b1) is in contact with the guide surface 1 (2b11).

6. The flange drilling fixture according to claim 5, characterized in that: The guide rod assembly (4) comprises a guide rod (4a) and a guide block (4b) fixedly connected to the upper end of the guide rod (4a) along the axial direction, and a second guide surface (4b1) is arranged on the outer side of the guide block (4b).

7. The flange drilling fixture according to claim 2, characterized in that: There are several mounting plates (6), each mounting plate (6) is fixedly connected with the clamping member (2) and the positioning column (5), and the number of the driving cylinders (3) is the same as the clamping member (2).

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