Flange machining jig

Abstract

This utility model relates to a flange processing fixture, including a support plate with multiple pads fixed on it. Each pad has a through hole penetrating the support plate at its center. Positioning posts are provided on both sides of each pad, with positioning protrusions coaxially positioned on the upper surface of each post. A flange is placed on the pads, with a central hole at its center. Side plates are provided on both sides of the flange, with bolt holes on each side. The positioning protrusions pass through the bolt holes, and a positioning pin is connected within the through hole. The positioning pin includes a guide portion and a pressure head located at the top of the guide portion. The guide portion passes through the central hole and the through hole. The pressure head presses against the upper surface of the flange. A rubber ring is provided between the pressure head and the flange. A pull-down assembly for gripping and pulling down the guide portion is connected to the bottom end of the guide portion. This application significantly improves the loading and unloading efficiency of flanges, meeting the needs of mass production.

Description

Technical Field

[0001] This utility model relates to the field of clamping fixture technology, and in particular to a flange processing fixture. Background Technology

[0002] A flange is a component used to connect pipe fittings and valves, attached to the pipe end. Flanges have holes, and bolts are used to tightly connect two flanges. A gasket seals between the flanges. Flanges are classified as threaded (screw-connected) flanges, welded flanges, and compression fitting flanges. In the flange manufacturing process, the center hole and bolt holes are first machined, and then the flange is fed into a milling machine for milling. During milling, the flange is fixed to a fixture using bolts passing through the center hole. This bolt-fixing method is cumbersome and unsuitable for mass production. Therefore, this invention proposes a flange processing fixture. Utility Model Content

[0003] The main objective of this invention is to provide a flange processing fixture to solve the problems mentioned in the background art.

[0004] This utility model achieves the above-mentioned objective through the following technical solution: a flange processing fixture includes a support plate, on which multiple pads are fixed. Each pad has a through hole penetrating the support plate at its center. Positioning posts are provided on both sides of each pad, and positioning protrusions are coaxially provided on the upper end face of each positioning post. A flange is placed on the pad, and a center hole is provided in the center of the flange. Side plates are provided on both sides of the flange, and bolt holes are provided on the side plates. The positioning protrusions pass through the bolt holes. A positioning pin is connected within the through hole. The positioning pin includes a guide portion and a pressure head located at the top of the guide portion. The guide portion passes through the center hole and the through hole. The pressure head presses against the upper end face of the flange. A rubber ring is provided between the pressure head and the flange. A pull-down assembly for gripping and pulling down the guide portion is connected to the bottom end of the guide portion.

[0005] Preferably, the pull-down assembly includes an L-shaped block with its vertical portion facing downwards and perpendicular to the length direction of the support plate. A cylinder perpendicular to the length direction is provided on one side of the support plate. The push rod of the cylinder is connected to the L-shaped block. The front end of the horizontal portion of the L-shaped block has a notch extending backwards from its end face. The bottom of both sides of the notch has downward inclined surfaces. The top of the inclined surfaces extends into the inside of the notch and forms a hook-shaped portion. The bottom of the guide portion has a V-shaped groove along its circumference. The bottom end of the guide portion extends into the notch. The hook-shaped portion extends into the V-shaped groove. The inclined surface abuts against the lower inclined surface of the V-shaped groove. The angle between the inclined surface and the vertical surface gradually decreases from the end of the horizontal portion of the L-shaped block inwards.

[0006] Preferably, the lower end face of the support plate is connected to multiple vertical plates, the multiple vertical plates are disposed on the workbench, a connecting plate is fixed to one side of the multiple vertical plates, the cylinder is disposed on the connecting plate, a positioning rod is fixed to the upper end face of the vertical plates, a positioning hole is provided on the lower end face of the support plate, the positioning rod extends into the positioning hole, connecting blocks are provided on both sides of the support plate on the workbench, a lifting cylinder is provided on the upper end face of the connecting block, a pressure block is connected to the top rod of the lifting cylinder, and the end of the pressure block abuts against the upper end face of the support plate.

[0007] Preferably, handles are connected to both sides of the support plate.

[0008] The beneficial effects of this utility model are as follows: the flange to be processed is placed on the pad, the positioning protrusion extends into the bolt hole, the rubber ring is put on the guide part of the positioning pin, and then the positioning pin is inserted into the center hole of the flange. The positioning pin is gripped and pulled down by the pull-down assembly, thereby pressing and fixing the flange on the pad, which facilitates subsequent processing. After processing is completed, the pull-down assembly releases the positioning pin, and the positioning pin is pulled upward to remove the flange. This greatly improves the loading and unloading efficiency of the flange and meets the needs of mass production. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the flange machining fixture structure for an example.

[0010] Figure 2 This is a schematic diagram of the flange structure.

[0011] Figure 3 This is a schematic diagram of the dropdown component structure.

[0012] Figure 4 This is a schematic diagram of an L-shaped block structure.

[0013] The numbers in the image represent:

[0014] 1. Pad; 2. Through hole; 3. Support plate; 4. Positioning post; 5. Positioning protrusion; 6. Flange; 7. Center hole; 8. Side plate; 9. Bolt hole; 10. Positioning pin; 11. Guide part; 12. Press head; 13. Rubber ring; 14. L-shaped block; 15. Cylinder; 16. Pull-down assembly; 17. Notch; 18. Bevel; 19. Hook-shaped part; 20. V-groove; 21. Lower bevel; 22. Vertical plate; 23. Connecting plate; 24. Lifting cylinder; 25. Press block; 26. Handle. Detailed Implementation

[0015] The present invention will be further described in detail below with reference to specific embodiments.

[0016] Example:

[0017] like Figure 1-4 As shown, a flange processing fixture of this utility model includes a support plate 3, on which multiple pads 1 are fixed. Each pad 1 has a through hole 2 penetrating the support plate 3 at its center. Positioning posts 4 are provided on both sides of each pad 1. Positioning protrusions 5 are coaxially provided on the upper end face of each positioning post 4. A flange 6 is placed on the pad 1. The flange 6 has a center hole 7 at its center. Side plates 8 are provided on both sides of the flange 6. Bolt holes 9 are provided on the side plates 8. The positioning protrusions 5 pass through the bolt holes 9. A positioning pin 10 is connected in the through hole 2. The positioning pin 10 includes a guide part 11 and a pressing head 12 located at the top of the guide part 11. The guide part 11 passes through the center hole 7 and the through hole 2. The pressing head 12 presses against the upper end face of the flange 6. A rubber ring 13 is provided between the pressing head 12 and the flange 6. A pull-down assembly 16 for gripping the guide part 11 and pulling it down is connected to the bottom end of the guide part 11.

[0018] The pull-down assembly 16 includes an L-shaped block 14 with its vertical portion facing downwards and perpendicular to the length direction of the support plate 3. A cylinder 15 is provided on one side of the support plate 3, perpendicular to its length direction. The push rod of the cylinder 15 is connected to the L-shaped block 14. The front end of the horizontal portion of the L-shaped block 14 has a notch 17 extending backwards from its end face. The bottom of both sides of the notch 17 has downward inclined surfaces 18. The top of the inclined surface 18 extends into the inside of the notch 17 and forms a hook-shaped portion 19. The bottom of the guide portion 11 has a V-shaped groove 20 along its circumference. The bottom end of the guide portion 11 extends into the notch 17. The hook-shaped portion 19 extends into the V-shaped groove 20. The inclined surface 18 abuts against the lower inclined surface 21 of the V-shaped groove 20. The angle between the inclined surface 18 and the vertical surface gradually decreases from the end of the horizontal portion of the L-shaped block 14 inwards.

[0019] The lower end face of the support plate 3 is connected to a plurality of vertical plates 22, which are disposed on the workbench. A connecting plate 23 is fixed to one side of each vertical plate 22. The cylinder 15 is disposed on the connecting plate 23. A positioning rod is fixed to the upper end face of each vertical plate 22. The lower end face of the support plate 3 is provided with a positioning hole, and the positioning rod extends into the positioning hole. Connecting blocks are provided on both sides of the support plate 3 on the workbench. A lifting cylinder 24 is provided on the upper end face of each connecting block. A pressure block 25 is connected to the top rod of the lifting cylinder 24, and the end of the pressure block 25 abuts against the upper end face of the support plate 3.

[0020] The support plate 3 has handles 26 connected to both sides.

[0021] The working process of this embodiment is as follows: The flange 6 to be processed is placed on the pad 1, the positioning protrusion 5 extends into the bolt hole 9, the rubber ring 13 is fitted onto the guide part 11 of the positioning pin 10, and then the positioning pin 10 is inserted into the center hole 7 of the flange 6. The bottom end of the positioning pin 10 passes through the pad 1 and the support plate 3 and protrudes from the lower end face of the support plate 3. The cylinder 15 drives the L-shaped block 14 to extend, the bottom of the guide part 11 enters the notch 17, the hook part 19 enters the V-groove 20, and the inclined surface 18 abuts against the lower inclined surface of the V-groove 20. 21, thereby preventing the positioning pin 10 from moving in the vertical direction, the cylinder 15 drives the L-shaped block 14 to continue to advance. Since the angle between the inclined surface 18 and the vertical surface gradually decreases from the end of the horizontal part of the L-shaped block 14 inward, the inclined surface 18 presses down on the lower inclined surface 21 of the V-groove 20, thereby pulling the positioning pin 10 downward and fixing the flange 6 on the support plate 3. After the flange 6 is processed, the cylinder 15 drives the L-shaped block 14 to reset, the hook-shaped part 19 exits the V-groove 20, and the positioning pin 10 is pulled upward, so that the flange 6 can be taken out.

[0022] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A flange processing fixture, characterized in that: The device includes a support plate on which multiple pads are fixed. Each pad has a through hole in its center, penetrating the support plate. Positioning posts are located on both sides of each pad, with positioning protrusions coaxially positioned on the upper surface of each post. A flange is placed on each pad, with a central hole in its center. Side plates are located on both sides of the flange, with bolt holes on each side. The positioning protrusions pass through the bolt holes, and a positioning pin is connected to the through hole. The positioning pin includes a guide portion and a pressure head at the top of the guide portion. The guide portion passes through the central hole and the through hole, and the pressure head presses against the upper surface of the flange. A rubber ring is provided between the pressure head and the flange. A pull-down assembly for gripping and pulling down the guide portion is connected to the bottom of the guide portion.

2. The flange processing fixture according to claim 1, characterized in that: The pull-down assembly includes an L-shaped block with its vertical portion facing downwards, perpendicular to the length direction of the support plate. A cylinder perpendicular to the length direction is provided on one side of the support plate. The cylinder's push rod is connected to the L-shaped block. The front end of the horizontal portion of the L-shaped block has a notch extending backwards from its end face. The bottom of both sides of the notch has downward-sloping surfaces. The top of the slopes extends into the inside of the notch and forms a hook-shaped portion. The bottom of the guide portion has a V-shaped groove along its circumference. The bottom end of the guide portion extends into the notch, and the hook-shaped portion extends into the V-shaped groove. The slope abuts against the lower slope of the V-shaped groove. The angle between the slope and the vertical surface gradually decreases from the end of the horizontal portion of the L-shaped block towards the inside.

3. A flange processing fixture according to claim 2, characterized in that: The lower end face of the support plate is connected to multiple vertical plates, which are disposed on the workbench. A connecting plate is fixed to one side of each vertical plate. The cylinder is disposed on the connecting plate. A positioning rod is fixed to the upper end face of each vertical plate. The lower end face of the support plate is provided with a positioning hole, and the positioning rod extends into the positioning hole. Connecting blocks are provided on both sides of the support plate on the workbench. A lifting cylinder is provided on the upper end face of each connecting block. A pressure block is connected to the top rod of the lifting cylinder, and the end of the pressure block abuts against the upper end face of the support plate.

4. A flange processing fixture according to claim 3, characterized in that: Handles are attached to both sides of the support plate.

Images