A kind of variable diameter flange positioning tool

Abstract

The invention discloses a variable diameter flange positioning tool, which relates to the field of processing, comprises a base, a left frame, a right frame, a left turntable, a right turntable, a clamping assembly, a rotating device, a correction device and a detection assembly, wherein the left turntable is rotatably connected to the left frame, and the right turntable is rotatably connected to the right frame; the left frame and the right frame are both provided with clamping assemblies, and the right turntable is provided with a correction device; by arranging the clamping assembly, the centers of the two flanges can be automatically aligned after the positioning of the two flanges is completed, the correction device can automatically correct the tapered tube, so that the tapered tube and the two flanges are concentric, and the three can be pressed and assembled synchronously without multiple positioning and clamping, thereby improving the concentricity of the three; the locating pin is butted with the locating hole of the pressure plate, so that the tapered tube and the two flanges can be rotated synchronously, which is convenient for welding; the detection assembly is arranged on the right turntable, and the air tightness detection can be directly performed on the tool, thereby reducing the processing cycle of the variable diameter flange.

Description

Technical Field

[0001] The invention relates to the field of processing, and in particular to a variable diameter flange positioning tool. Background Art

[0002] A reducer flange is an intermediate connector used to connect two different pipes. It is usually composed of a large flange, a small flange and a tapered pipe in the middle.

[0003] During the processing of the existing reducer flange, workers are required to weld one end of the tapered tube to the large flange, and then weld the other end of the tapered tube to the small flange. A positioning fixture is required during the welding process. Most of the existing positioning fixtures are divided into two independent sets, one set is used for welding and positioning of the large flange and the tapered tube, and the other set is used for welding and positioning of the small flange and the tapered tube.

[0004] This results in the need for separate welding, many welding steps, and the large flange and the small flange are prone to eccentricity during repeated positioning. In addition, most of the existing positioning tooling is fixed in position after the flange and the tapered tube are clamped. This requires workers to hold the welding gun and rotate it around the connection between the flange and the tapered tube for one circle before they can completely weld. When robot welding is required, since the trajectory of the welding gun is circular, the robot needs to constantly change the welding position, which places high demands on the robot's accuracy and is prone to welding offset, affecting the welding quality.

[0005] In addition, the existing positioning clamping does not have the function of auxiliary air tightness detection, so after the reducer flange is welded, it is usually necessary to use air tightness detection equipment at other stations to detect whether the air tightness of the reducer flange after processing is qualified, so as to determine whether there are pores in the weld. This undoubtedly increases the processing cycle of the reducer flange. Summary of the invention

[0006] The purpose of the present invention is to provide a variable diameter flange positioning tool to solve the problems mentioned in the above background technology.

[0007] A variable diameter flange positioning tool comprises a base, a left frame, a right frame, a left turntable, a right turntable, a clamping assembly, a rotating device, a correction device and a detection assembly.

[0008] The left frame slides and translates on the base through a linear module, the right frame is fixedly connected to the base, the left turntable is rotatably connected to the left frame, and the right turntable is rotatably connected to the right frame;

[0009] The left and right frames are both provided with a clamping assembly, and the clamping assembly includes a clamping motor and a driving tube, the output shaft of the clamping motor is fixedly connected to a gear 1, and the driving tubes in the two clamping assemblies are rotatably connected to the left frame and the right frame respectively, and the two driving tubes are coaxially arranged, and one end of the driving tube is fixedly connected to a gear 2, and the gear 2 is meshed with the gear 1. The side walls of the left frame and the right frame are each provided with four slide grooves, and the slide grooves are slidably connected with a slider, one end of the slider is rotatably connected with a roller, and the other end is rotatably connected with a pulley, and the roller is provided with a baffle, and the side walls of the left frame and the right frame are symmetrically slidably connected to two limit plates by the slide up and down, and the limit plate is provided with a limit groove, and two pulleys are slidably connected in the limit groove, and the driving tube is also fixedly connected to a central gear, and both sides of the central gear are meshed with racks, and one end of the rack is fixedly connected to one of the limit plates and slidably connected to the other limit plate;

[0010] The rotating device is used to drive the left turntable to rotate, and the right turntable is provided with a correction device;

[0011] The correction device is used for centering the tapered tube. The larger diameter of the tapered tube faces the left turntable. When the left turntable moves toward the right turntable, the correction device docks with the docking assembly provided on the left turntable and transmits the rotational force of the left turntable to the right turntable, and automatically corrects the tapered tube to a position concentric with the flange.

[0012] The detection assembly is connected to the right turntable and is used to inflate the enclosed space formed between the reducer flange and the left turntable and the right turntable and detect the air tightness of the reducer flange.

[0013] Preferably, the rotating device includes a rotating motor and a rotating shaft, the rotating motor is fixedly connected to the right frame, the output shaft of the rotating motor is fixedly connected to gear three, one end of the rotating shaft passes through the driving tube on the left frame and is fixedly connected to the left turntable, and the other end thereof is fixedly connected to gear four, and gear three is meshed with gear four.

[0014] Preferably, the correction device includes a support shaft and a support seat, the right end of the support shaft is fixedly connected to the right turntable, and the left end thereof is slidably connected to an articulated sleeve 1, and the support shaft is also fixedly connected to an articulated sleeve 2, and the articulated sleeve 1 is located on the left side of the articulated sleeve 2, and the support seat is provided with four articulated support blocks equidistantly around the circumference of the support shaft, and the support seat is detachably connected to a contoured support block by screws, and the bottom of the support seat is hinged with two support rods, one of which is hinged to the articulated sleeve 2, and the other is hinged to the articulated sleeve 1, and a spring 1 is sleeved on the support shaft between the articulated sleeve 2 and the articulated sleeve 1.

[0015] Preferably, the articulated sleeve 1 is provided with a spline, the support shaft is provided with a spline groove, the left end of the articulated sleeve 1 is provided with a pressure plate, a positioning hole is opened on the pressure plate, and sealing gaskets are provided on the left turntable and the right turntable.

[0016] Preferably, the detection component includes an air pipe, one end of which is fixedly connected to the center of the right turntable, and the other end of which passes through the drive pipe on the right frame and is connected to a rotary joint, which is connected to the air tightness detection device, and the right turntable is provided with a plurality of air ports connected to the air pipe.

[0017] Preferably, two docking assemblies corresponding to the positioning holes are provided in the left turntable, and the docking assembly includes an outer shell, a positioning pin is slidably connected in the outer shell, a spring 2 is provided between the positioning pin and the inner bottom of the outer shell, and a ball is provided at the end of the positioning pin.

[0018] The advantages of the present invention are:

[0019] By setting a clamping assembly, the centers of the two flanges can be automatically aligned after the two flanges are positioned. A conical tube is put on the correction device. When the left frame is close to the right frame, the correction device can automatically correct the conical tube so that the conical tube is concentric with the two flanges and the three are pressed and assembled without multiple positioning and clamping, thereby improving the concentricity of the three.

[0020] The positioning pin on the left turntable is docked with the positioning hole of the pressure plate, so that the left turntable and the right turntable can rotate synchronously, thereby driving the tapered tube and the two flanges to rotate synchronously, so that the welding work of the large flange and the tapered tube and the small flange and the tapered tube can be completed simultaneously without changing the position of the welding gun, so that the welding gun does not need to be adjusted every time, and the welding accuracy is high;

[0021] An air pipe is arranged on the right turntable, and gas can be filled into the enclosed space formed between the reducer flange and the left turntable and the right turntable, so that the air tightness test can be carried out directly on the tooling after the welding is completed, without adding additional testing stations, which greatly reduces the processing cycle of the reducer flange. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is an axonometric view of the present invention;

[0023] Figure 2 is a side view of the present invention;

[0024] Figure 3 It is a cross-sectional view of the present invention after the clamping is completed;

[0025] Figure 4 for Figure 3 A partial enlarged view of the middle A;

[0026] Figure 5It is a structural schematic diagram of the clamping device on the left frame;

[0027] Figure 6 This is a schematic diagram of the structures on the right rack.

[0028] Figure 7 It is a structural schematic diagram of a reducing flange.

[0029] In the figure: 1, base; 2, left frame; 3, right frame; 4, left turntable; 5, right turntable;

[0030] 6. Clamping assembly; 60. Clamping motor; 61. Driving tube; 62. Gear 1; 63. Gear 2; 64. Sliding block; 65. Sliding groove; 641. Roller; 642 Pulley; 643. Baffle; 65. Limiting plate; 651. Limiting groove; 66. Center gear; 67. Rack; 68. Sliding rack;

[0031] 7. Rotating device; 71. Rotating motor; 72. Rotating shaft; 73. Gear three; 74. Gear four;

[0032] 8. Correction device; 80. Support shaft; 81. Support seat; 82. Articulated sleeve 1; 83. Press plate; 84. Positioning hole; 85. Articulated sleeve 2; 86. Profile support block; 87. Support rod; 88. Spring 1;

[0033] 9. Detection component; 91. Air pipe; 92. Rotary joint;

[0034] 10. Docking assembly; 101. Outer shell; 102. Locating pin; 103. Spring 2; 11. Linear module; 12. Sealing gasket; 13. Tapered tube; 14. Large flange; 15. Small flange. DETAILED DESCRIPTION

[0035] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0036] like Figures 1 to 7 As shown, a variable diameter flange positioning tool comprises a base 1, a left frame 2, a right frame 3, a left turntable 4, a right turntable 5, a clamping assembly 6, a rotating device 7, a correction device 8 and a detection assembly 9.

[0037] The left frame 2 slides and translates on the base 1 through the linear module 11, the right frame 3 is fixedly connected to the base 1, the left turntable 4 is rotatably connected to the left frame 2, and the right turntable 5 is rotatably connected to the right frame 3;

[0038] The left frame 2 and the right frame 3 are both provided with a clamping assembly 6, the clamping assembly 6 includes a clamping motor 60 and a driving tube 61, the output shaft of the clamping motor 60 is fixedly connected to a gear 1 62, the driving tubes 61 in the two clamping assemblies 6 are respectively rotatably connected to the left frame 2 and the right frame 3, the two driving tubes 61 are coaxially arranged, one end of the driving tube 61 is fixedly connected to a gear 2 63, the gear 2 63 is meshed with the gear 1 62, the side walls of the left frame 2 and the right frame 3 are both provided with four sliding grooves 65, a slider 64 is slidably connected in the sliding groove 65, one end of the slider 64 is rotatably connected to a roller 641 and the other end is rotatably connected to a pulley 642, the roller 641 can rotate as the flange can rotate, so that the flange can rotate smoothly, a baffle 643 is provided on the roller 641, the baffle 643 serves to block the flange and prevent the flange from slipping.

[0039] The side walls of the left frame 2 and the right frame 3 are symmetrically slidably connected to two limit plates 65 through a slide 68. The limit plates 65 are provided with limit grooves 651. Two pulleys 642 are slidably connected in the limit grooves 651. A central gear 66 is also fixedly connected to the driving tube 61. Racks 67 are meshed on both sides of the central gear 66. One end of the rack 67 is fixedly connected to one of the limit plates 65 and is slidably connected to the other limit plate 65.

[0040] The rotating device 7 is used to drive the left turntable 4 to rotate, and the right turntable 5 is provided with a correction device 8;

[0041] The correction device 8 is used for centering the tapered tube 13. The tapered tube 13 is sleeved on the outside of the correction device 8, and the larger diameter of the tapered tube 13 faces the left turntable 4. When the left turntable 4 moves toward the right turntable 5, the correction device 8 docks with the docking assembly 10 provided on the left turntable 4 and transmits the rotational force of the left turntable 4 to the right turntable 5, and automatically calibrates the tapered tube 13 to a position concentric with the flange.

[0042] The detection component 9 is connected to the right turntable 5 and is used to inflate the enclosed space formed between the reducer flange and the left turntable 4 and the right turntable 5 and detect the air tightness of the reducer flange.

[0043] In this embodiment, the rotating device 7 includes a rotating motor 71 and a rotating shaft 72. The rotating motor 71 is fixedly connected to the right frame 3. The output shaft of the rotating motor 71 is fixedly connected to gear three 73. One end of the rotating shaft 72 passes through the driving tube 61 on the left frame 2 and is fixedly connected to the left turntable 4, and the other end thereof is fixedly connected to gear four 74. Gear three 73 is meshed with gear four 74.

[0044] In this embodiment, the correction device 8 includes a support shaft 80 and a support seat 81. The right end of the support shaft 80 is fixedly connected to the right turntable 5, and the left end thereof is slidably connected to an articulated sleeve 1 82. The support shaft 80 is also fixedly connected to an articulated sleeve 2 85. The articulated sleeve 1 82 is located on the left side of the articulated sleeve 2 85. The support seat 81 is provided with four equidistantly arranged around the circumference of the support shaft 80. The support seat 81 is detachably connected to a profiling support block 86 by screws. The profiling conical tube 13 is detachably connected to the support seat 81 by screws, so that different profiling support blocks 86 can be replaced to adapt to conical tubes 13 of different tapers. Two support rods 87 are hinged at the bottom of the support seat 81, one of which is hinged to the articulated sleeve 2 85, and the other is hinged to the articulated sleeve 1 82. A spring 1 88 is sleeved on the support shaft 80 between the articulated sleeve 2 85 and the articulated sleeve 1 82.

[0045] In this embodiment, a spline is provided on the hinge sleeve 82, and a spline groove sliding with the spline is provided on the support shaft 80. The hinge sleeve 82 and the support shaft 80 slide through the spline and the spline groove. While the hinge sleeve 82 can slide on the support shaft 80, the rotation of the pressure plate 83 can drive the support shaft 80 through the hinge sleeve 82, thereby driving the left turntable 4 to rotate synchronously. A pressure plate 83 is provided at the left end of the hinge sleeve 82, and a positioning hole 84 is opened on the pressure plate 83. A sealing gasket 12 is provided on both the left turntable 4 and the right turntable 5. The sealing gasket 12 can seal between the large flange 14 and the left turntable 4, and between the small flange 15 and the right turntable 5.

[0046] In this embodiment, two docking assemblies 10 corresponding to the positioning holes 84 are arranged in the left turntable 4, and the docking assembly 10 comprises an outer shell 101, a positioning pin 102 is slidably connected in the outer shell 101, a spring 2 103 is arranged between the positioning pin 102 and the inner bottom of the outer shell 101, and a ball is arranged at the end of the positioning pin 102. The ball plays a role in reducing friction.

[0047] In this embodiment, the detection component 9 includes an air pipe 91, one end of which is fixedly connected to the center of the right turntable 5, and the other end thereof passes through the drive pipe 61 on the right frame 3 and is connected to a rotary joint 92, which is connected to the airtightness detection device. The rotary joint 92 is to maintain the connection with the airtightness detection device when the air pipe 91 rotates. The right turntable 5 is provided with a plurality of air ports connected to the air pipe 91. A certain amount of gas is filled and an airtightness detection device is used to observe whether the air pressure in the enclosed space formed between the reducer flange and the left turntable 4 and the right turntable 5 changes. If the air pressure decreases, it is judged that the airtightness is unqualified, then there may be a leak at the weld, and the unqualified reducer flange is sorted out in time.

[0048] Working process and principle:

[0049] The reducer flange is composed of a large flange 15, a tapered tube 13 and a small flange 14. When the tool is used, the large flange 14 is first placed between the four rollers 641 of the left frame 2, and the small flange 15 is placed between the four rollers 641 of the right frame 3. The four rollers 641 form a square.

[0050] The clamping motor 60 is started, and the drive tube 61 is driven to rotate through gear 1 62 and gear 2 63. The rotation of the drive tube 61 drives the central gear 66 to rotate. Since the rack 67 is meshed with the central gear 66, the rack 67 moves closer to each other at this time, so that the two limit plates 65 are close to each other under the limited sliding action of the slide 68. When the limit plates 65 are close, the limit groove 651 has a downward force on the pulley 642. Because the slider 64 can only slide in the slide groove 65, the pulleys 642 in the same limit groove 651 are close to each other at this time, and the four sliders 64 move toward the center synchronously. Finally, the roller 641 is used to clamp the flange and preliminarily determine the center of the flange. Since the roller 641 and the flange are only in cross-sectional contact, the friction force is not enough to limit the axial movement of the flange, so a baffle 643 is set on the roller 641. The baffle 643 serves to block the flange and prevent the flange from slipping.

[0051] After the centers of the two flanges are determined in the same manner, the conical tube 13 is placed on the outside of the correction device 8 with the small opening facing the right turntable 5 , and then the linear module 11 is used to drive the left frame 2 to move linearly toward the right frame 3 .

[0052] While the left frame 2 is translated, the rotating motor 71 is started to drive the rotating shaft 72 to rotate through gear three 73 and gear four 74. The rotating shaft 72 rotates and is fixed together with the left turntable 4, so the left turntable 4 can rotate slowly. The rotation speed of the turntable is the speed of the overall rotation of the flange and the tapered tube 13 during welding. When the turntable contacts the pressure plate 83, the locating pin 102 abuts against the pressure plate 83, the spring two 103 is compressed, and the ball at the end of the locating pin 102 reduces friction. As the turntable rotates, the locating pin 102 is inserted into the locating hole 84 to achieve docking.

[0053] The hinge sleeve 1 82 and the support shaft 80 slide through the spline and the spline groove, and the rotation of the pressure plate 83 can drive the support shaft 80 through the hinge sleeve 1 82, thereby driving the left turntable 4 to rotate synchronously.

[0054] At the same time, as the right turntable 5 is approaching, the spring 1 88 is compressed, the hinge sleeve 1 82 slides rightward on the support shaft 80, the distance between the hinge sleeve 1 82 and the hinge sleeve 2 85 becomes smaller, and the support rod 87 continuously pushes the support seat 81 outward to expand, and when the profiling support block 86 contacts the tapered tube 13 and supports the tapered tube 13, the tapered tube 13 is concentric with the two flanges. The profiling tapered tube 13 is detachably connected to the support seat 81 by screws, so that different profiling support blocks 86 can be replaced to adapt to tapered tubes 13 with different tapers.

[0055] At this time, the end face of the tapered tube 13 is just pressed between the two flanges, and the other end faces of the two flanges are also respectively fitted with the left turntable 4 and the right turntable 5. The sealing gasket 12 can seal between the large flange 14 and the left turntable 4, and the small flange 15 and the right turntable 5.

[0056] At this time, when the left turntable 4 and the right turntable 5 rotate, the tapered tube 13 and the two flanges can be driven to rotate synchronously. The roller 641 will also rotate during this process, so that the flanges can rotate normally. The welding gun can weld the large flange 14 and the tapered tube 13 as well as the small flange 15 and the tapered tube 13 at the same time. The position of the welding gun can remain unchanged, reducing the error of the welding position.

[0057] After welding is completed, a certain amount of gas is filled into the enclosed space formed between the reducer flange and the left turntable 4 and the right turntable 5 through the air pipe 91, and an air tightness detection device is used to observe whether the air pressure changes. The air tightness detection device is not shown in the figure. The rotating joint 92 is designed to maintain connection with the air tightness detection device when the air pipe 91 rotates.

[0058] If the air pressure decreases, leakage occurs and the air tightness is judged to be unqualified, then there may be leakage at the weld, so the unqualified reducer flange can be sorted out in time on the same tooling. It is not necessary to equip a separate air tightness detection tooling.

[0059] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the above disclosed embodiments are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. A variable diameter flange positioning tool, characterized in that: The invention comprises a base (1), a left frame (2), a right frame (3), a left turntable (4), a right turntable (5), a clamping assembly (6), a rotating device (7), a correction device (8) and a detection assembly (9). The left frame (2) slides and translates on the base (1) via a linear module (11); the right frame (3) is fixedly connected to the base (1); the left turntable (4) is rotationally connected to the left frame (2); and the right turntable (5) is rotationally connected to the right frame (3); The left frame (2) and the right frame (3) are both provided with a clamping assembly (6), and the clamping assembly (6) includes a clamping motor (60) and a driving tube (61). The output shaft of the clamping motor (60) is fixedly connected with a gear 1 (62). The driving tubes (61) in the two clamping assemblies (6) are respectively rotatably connected with the left frame (2) and the right frame (3). The two driving tubes (61) are coaxially arranged, and one end of the driving tube (61) is fixedly connected with a gear 2 (63). The gear 2 (63) is meshed with the gear 1 (62). The side walls of the left frame (2) and the right frame (3) are both provided with four sliding grooves, and a slider (64) is slidably connected in the sliding groove. One end of the slider (64) The left end of the left frame (2) and the right frame (3) are rotatably connected to a roller (641), and the other end thereof is rotatably connected to a pulley (642), a baffle (643) is provided on the roller (641), the side walls of the left frame (2) and the right frame (3) are symmetrically slidably connected to two limit plates (65) through a slide (68), the limit plates (65) are provided with limit grooves (651), and two pulleys (642) are slidably connected in the limit grooves (651), the driving tube (61) is also fixedly connected to a central gear (66), both sides of the central gear (66) are meshed with racks (67), one end of the rack (67) is fixedly connected to one of the limit plates (65), and is slidably connected to the other limit plate (65); The rotating device (7) is used to drive the left turntable (4) to rotate, and the right turntable (5) is provided with a correction device (8); The correction device (8) is used for centering the tapered tube (13). The tapered tube (13) has a larger diameter facing the left turntable (4). When the left turntable (4) moves toward the right turntable (5), the correction device (8) docks with the docking assembly (10) provided on the left turntable (4) and transmits the rotational force of the left turntable (4) to the right turntable (5), and automatically calibrates the tapered tube (13) to a position concentric with the flange. The detection assembly (9) is connected to the right turntable (5) and is used to inflate the enclosed space formed between the reducer flange and the left turntable (4) and the right turntable (5) and detect the air tightness of the reducer flange; The correction device (8) comprises a support shaft (80) and a support seat (81), the right end of the support shaft (80) is fixedly connected to the right turntable (5), and the left end thereof is slidably connected to an articulated sleeve 1 (82), the support shaft (80) is also fixedly connected to an articulated sleeve 2 (85), the articulated sleeve 1 (82) is located on the left side of the articulated sleeve 2 (85), the support seat (81) is provided with four equidistantly arranged around the circumference of the support shaft (80), the support seat (81) is detachably connected to a contoured support block (86) by means of screws, the bottom of the support seat (81) is hinged with two support rods (87), one of the support rods (87) is hinged to the articulated sleeve 2 (85), and the other support rod (87) is hinged to the articulated sleeve 1 (82), and a spring 1 (88) is sleeved on the support shaft (80) between the articulated sleeve 2 (85) and the articulated sleeve 1 (82).

2. The variable diameter flange positioning tool according to claim 1, characterized in that: The rotating device (7) comprises a rotating motor (71) and a rotating shaft (72), wherein the rotating motor (71) is fixedly connected to the right frame (3), the output shaft of the rotating motor (71) is fixedly connected to a gear three (73), one end of the rotating shaft (72) passes through a driving tube (61) on the left frame (2) and is fixedly connected to the left turntable (4), and the other end thereof is fixedly connected to a gear four (74), and the gear three (73) is meshed with the gear four (74).

3. The variable diameter flange positioning tool according to claim 1, characterized in that: The hinge sleeve (82) is provided with a spline, the support shaft (80) is provided with a spline groove, the left end of the hinge sleeve (82) is provided with a pressure plate (83), the pressure plate (83) is provided with a positioning hole (84), and the left turntable (4) and the right turntable (5) are both provided with sealing pads (12).

4. The variable diameter flange positioning tool according to claim 1, characterized in that: The detection assembly (9) comprises an air pipe (91), one end of which is fixedly connected to the center of the right turntable (5), and the other end of which passes through a drive pipe (61) on the right frame (3) and is connected to a rotary joint (92), the rotary joint (92) being connected to an air tightness detection device, and the right turntable (5) is provided with a plurality of air ports connected to the air pipe (91).

5. The variable diameter flange positioning tool according to claim 1, characterized in that: The left turntable (4) is provided with two docking assemblies (10) corresponding to the positioning holes (84), the docking assembly (10) comprising an outer shell (101), a positioning pin (102) being slidably connected inside the outer shell (101), a spring 2 (103) being provided between the positioning pin (102) and the inner bottom of the outer shell (101), and a ball bearing being provided at the end of the positioning pin (102).

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