A welding fixture for flange processing

Abstract

The present invention discloses a welding fixture for flange processing, which relates to the technical field of flange processing, and comprises a base, wherein a vertical pipe is fixedly connected to the middle position of the top surface of the base, a support frame is provided on the side position of the top surface of the base close to the vertical pipe, and a positioning mechanism is provided on the side of the vertical pipe. After being acted upon by the gravity of the flange body, the support frame will convert the gravity of the flange body into an extrusion force acting on the positioning mechanism, so that the positioning mechanism acts on the inner side surface of the flange body; through the support frame and the transmission gear set, the positioning mechanism will convert the air pressure into an extrusion force on the inner side surface of the flange body after being acted upon by the air pressure, thereby realizing the positioning of the flange body and ensuring the fixation of the flange body. Therefore, the automatic positioning of the flange body can be realized through the cooperation of the support frame and the positioning mechanism, which facilitates the welding of the flange body.

Description

Technical Field

[0001] The present invention relates to the technical field of flange processing, in particular to a welding fixture for flange processing. Background Art

[0002] Before welding, the flange needs to be fixed, which requires a welding fixture for flange processing. The fixture can fix the flange, facilitate the welding operation of the flange, and ensure the quality of the welding;

[0003] The current welding fixtures used for flange processing fix the flanges through clamps. Due to the special shape of the flanges themselves, at least three points must be fixed to ensure the stability of the flanges when clamping them. In addition, due to the different flange specifications, the weight of the flanges is also different. When fixing flanges of different specifications, different clamping forces need to be provided. In this way, the staff need to constantly adjust the clamping force of the fixture. The process is time-consuming and labor-intensive, and prone to errors, resulting in a mismatch between the clamping force and the flange specifications, thereby affecting the quality of flange welding. Summary of the Invention

[0004] In order to overcome the above-mentioned technical problems, the purpose of the present invention is to provide a welding fixture for flange processing to solve the problem in the prior art that different clamping forces are required for flanges of different specifications, and the existing fixtures need to be manually adjusted to adapt to changes in flange specifications. The manual adjustment process is time-consuming and labor-intensive, and prone to errors, resulting in a mismatch between the clamping force and the flange specifications, thereby affecting the flange welding quality.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] The flange body is welded to the flange and the flange body is welded to the flange body, and the flange body is welded to the flange body. The flange body is welded to the flange and the flange body is welded to the flange body. The flange body is welded to the flange and the flange body is welded to the flange body. The flange body is welded to the flange and the flange body is welded to the flange body. The flange body is welded to the flange and the flange body is welded to the flange body. The flange body is welded to the flange and the flange body is welded to the flange body. The flange body is welded to the flange and the flange body is welded to the flange body. The flange body is welded to the flange and the flange body is welded to the flange body. The flange body is welded to the flange and the flange body is welded to the flange body. The flange body is welded to the flange and the flange body is welded to the flange body. The flange body is welded to the flange and the flange body is welded to the flange body. The flange body is welded to the flange and the flange body is welded to the flange body. The flange body is welded to the flange and the flange body is welded to the flange body. The flange body is welded to the flange and the flange body is welded to the flange body. The flange body is welded to the flange and the flange body is welded to the flange body.

[0007] As a further solution of the present invention: the number of the support frames is at least two groups, a fixing rod is fixedly connected to the inside of the base near the bottom end of the support frame, and a cavity is opened at the bottom end of the support frame to fit with the fixing rod. The two groups of support frames are symmetrically arranged. If there are three groups of support frames, they are equidistantly arranged on the outside of the vertical pipe, and the setting amount of the positioning mechanism corresponds one to one to the number of support frames, and the two groups of positioning mechanisms are arranged alternately, and the angle between the two groups of positioning mechanisms is ensured to be ninety degrees.

[0008] As a further solution of the present invention: the positioning mechanism includes several groups of first positioning rods and second positioning rods, and the opposite ends of the first positioning rods and the second positioning rods are provided with connecting rods, one end of the connecting rod is fixedly connected to the second positioning rod, and the other end of the connecting rod is fixedly connected to the piston.

[0009] As a further solution of the present invention: an air pressure chamber that fits with the piston is opened inside the first positioning rod near the piston, and a transmission gear is installed at the port of the air pressure chamber through a rotating shaft. One side of the transmission gear engages with the inner wall of the air pressure chamber, and the other side of the transmission gear engages with the side of the connecting rod.

[0010] As a further solution of the present invention: the outer ends of the first positioning rod and the second positioning rod are fixedly connected with rubber heads. On the one hand, the rubber heads can play a buffering role, and on the other hand, they can increase the friction between the first positioning rod and the second positioning rod and the inner side surface of the flange body, making the positioning of the flange body more stable.

[0011] As a further solution of the present invention: a transmission gear set is engaged with the side of the support frame, and the transmission gear set is engaged with the bottom surface of the first positioning rod at one end away from the support frame. The transmission gear set consists of three gears, and the three gears are powered by a toothed belt. The first gear is engaged with the side of the support frame, and the gear is connected to the second gear through a toothed belt. The second gear is connected to the third gear through a toothed belt, and the third gear is engaged with the bottom surface of the first positioning rod. In this way, when the support frame moves downward, since the first gear is engaged with the side of the support frame, the first gear will be driven to rotate counterclockwise during the downward movement of the support frame. Since the gear is connected to the second gear through a toothed belt, the second gear will also rotate counterclockwise. At the same time, since the second gear is connected to the third gear through a toothed belt, and the third gear is engaged with the bottom surface of the first positioning rod, the third gear will drive the first positioning rod to the outside of the riser, and cooperate with the air pressure drive of the air pressure chamber to achieve dual control.

[0012] As a further solution of the present invention: the cavity inside the support frame is connected with the air pressure cavity through the air pipe. When the support frame moves downward, since the cavity on the bottom surface of the support frame is sleeved on the outside of the fixing rod, the fixing rod will penetrate into the cavity on the bottom surface of the support frame. In this process, the fixing rod will reduce the volume of the cavity on the bottom surface of the support frame, thereby forming high pressure in the cavity on the bottom surface of the support frame. Since the cavity inside the support frame is connected with the air pressure cavity through the air pipe, the cavity on the bottom surface of the support frame will transport air to the air pressure cavity through the air pipe, thereby increasing the air pressure in the air pressure cavity.

[0013] Beneficial effects of the present invention:

[0014] 1. Through the support frame and positioning mechanism of the present invention, the flange body to be welded is sleeved on the outer side of the riser, and the flange body will slide downward along the side of the riser and press on the top surface of the support frame. After being acted upon by the gravity of the flange body, the support frame will convert the gravity of the flange body into an extrusion force, and the air pressure will be transmitted to the positioning mechanism. After being acted upon by the air pressure, the positioning mechanism will convert the air pressure into an extrusion force on the inner side of the flange body, thereby realizing the positioning of the flange body and ensuring the fixation of the flange body. In addition, the force exerted by the positioning mechanism on the flange body is related to the gravity of the flange body itself, that is, the larger the volume of the flange body, the greater the gravity, and the greater the force exerted by the positioning mechanism on the flange body, thereby realizing the adaptive change of the positioning mechanism. Therefore, the cooperation of the support frame and the positioning mechanism can realize automatic positioning of the flange body, which facilitates the welding of the flange body.

[0015] 2. Through the transmission gear set of the present invention, when the support frame moves downward, since the first gear is engaged with the side surface of the support frame, the first gear will be driven to rotate counterclockwise during the downward movement of the support frame. Since the gear is connected to the second gear through a toothed belt, the second gear will also rotate counterclockwise. At the same time, since the second gear is connected to the third gear through the toothed belt, and the third gear is engaged with the bottom surface of the first positioning rod, the third gear will drive the first positioning rod to the outside of the riser, cooperating with the air pressure drive of the air pressure chamber, thereby realizing dual control and ensuring the positioning of the flange body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 It is a structural diagram of the positioning mechanism in the present invention.

[0019] In the figure: 1. Base; 2. Vertical pipe; 3. Support frame; 4. Fixed rod; 5. Transmission gear set; 6. Positioning mechanism; 61. First positioning rod; 62. Second positioning rod; 63. Rubber head; 64. Air pressure chamber; 65. Connecting rod; 66. Piston; 67. Transmission gear; 7. Synchronous rod; 8. Flange body. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0021] like Figure 1 and Figure 2 As shown, a welding fixture for flange processing includes a base 1, a standpipe 2 fixedly connected to the middle position of the top surface of the base 1, a support frame 3 is provided on the side of the top surface of the base 1 near the standpipe 2, and a positioning mechanism 6 is provided on the side of the standpipe 2. After being acted upon by the gravity of the flange body 8, the support frame 3 converts the gravity of the flange body 8 into an extrusion force acting on the positioning mechanism 6, so that the positioning mechanism 6 acts on the inner side surface of the flange body 8;

[0022] During operation, the flange body 8 to be welded can be put on the outside of the vertical pipe 2. The flange body 8 will slide downward along the side of the vertical pipe 2 and press on the top surface of the support frame 3. After being affected by the gravity of the flange body 8, the support frame 3 will convert the gravity of the flange body 8 into an extrusion force. The air pressure will be transmitted to the positioning mechanism 6. After being affected by the air pressure, the positioning mechanism 6 will convert the air pressure into an extrusion force on the inner side of the flange body 8, thereby realizing the positioning of the flange body 8 and ensuring the fixation of the flange body 8. Therefore, the cooperation between the support frame 3 and the positioning mechanism 6 can realize automatic positioning of the flange body 8, which facilitates the welding of the flange body 8.

[0023] like Figure 1 As shown, there are at least two groups of support frames 3. A fixing rod 4 is fixedly connected to the bottom of the base 1 near the bottom of the support frame 3. A cavity that fits with the fixing rod 4 is opened at the bottom of the support frame 3. The two groups of support frames 3 are symmetrically arranged. If there are three groups of support frames 3, they are equidistantly arranged on the outside of the vertical pipe 2. The setting amount of the positioning mechanism 6 corresponds one to one to the number of the support frames 3, and the two groups of positioning mechanisms 6 are arranged alternately, and the angle between the two groups of positioning mechanisms 6 is ensured to be ninety degrees.

[0024] like Figure 2As shown, the positioning mechanism 6 includes several groups of first positioning rods 61 and second positioning rods 62, and the several first positioning rods 61 are synchronized by a synchronization rod 7. The opposite ends of the first positioning rods 61 and the second positioning rods 62 are provided with a connecting rod 65, one end of the connecting rod 65 is fixedly connected to the second positioning rod 62, and the other end of the connecting rod 65 is fixedly connected to a piston 66. An air pressure chamber 64 that fits with the piston 66 is opened near the piston 66 inside the first positioning rod 61, and a transmission gear 67 is installed at the end of the air pressure chamber 64 through a rotating shaft. One side of the transmission gear 67 is meshed with the inner wall of the air pressure chamber 64, and the other side of the transmission gear 67 is meshed with the side surface of the connecting rod 65.

[0025] During operation, when the air pressure chamber 64 is acted upon by air pressure, the air pressure chamber 64 will form a high-pressure state, so that the high-pressure air pressure chamber 64 will act on the piston 66, and the piston 66 will act on the second positioning rod 62 through the connecting rod 65, causing the second positioning rod 62 to move toward the end away from the first positioning rod 61, and because a transmission gear 67 is installed at the end of the air pressure chamber 64 through a rotating shaft, when the connecting rod 65 moves, it will act on the first positioning rod 61 through the transmission gear 67, causing the first positioning rod 61 and the second positioning rod 62 to move synchronously in opposite directions, thereby ensuring that the first positioning rod 61 and the second positioning rod 62 are synchronously moved out of the riser 2 and act on the inner side surface of the flange body 8.

[0026] The outer ends of the first positioning rod 61 and the second positioning rod 62 are fixedly connected with a rubber head 63. On the one hand, the rubber head 63 can play a buffering role. On the other hand, it can also increase the friction between the first positioning rod 61 and the second positioning rod 62 and the inner side of the flange body 8, making the positioning of the flange body 8 more stable.

[0027] like Figure 1 and Figure 2 As shown, a transmission gear set 5 is engaged with the side of the support frame 3, and the end of the transmission gear set 5 away from the support frame 3 is engaged with the bottom surface of the first positioning rod 61. The transmission gear set 5 consists of three gears, and the three gears are powered by a toothed belt. The first gear is engaged with the side of the support frame 3, and the gear is connected to the second gear through a toothed belt. The second gear is connected to the third gear through a toothed belt, and the third gear is engaged with the bottom surface of the first positioning rod 61. In this way, when the support frame 3 moves downward, since the first gear is engaged with the side of the support frame 3, the first gear will be driven to rotate counterclockwise during the downward movement of the support frame 3. Since the gear is connected to the second gear through a toothed belt, the second gear will also rotate counterclockwise. At the same time, since the second gear is connected to the third gear through a toothed belt, and the third gear is engaged with the bottom surface of the first positioning rod 61, the third gear will drive the first positioning rod 61 to the outside of the standpipe 2, and cooperate with the air pressure drive of the air pressure chamber 64 to achieve dual control.

[0028] The cavity inside the support frame 3 is connected to the air pressure chamber 64 through the trachea. When the support frame 3 moves downward, since the cavity on the bottom surface of the support frame 3 is sleeved on the outside of the fixing rod 4, the fixing rod 4 will penetrate into the cavity on the bottom surface of the support frame 3. In this process, the fixing rod 4 will reduce the volume of the cavity on the bottom surface of the support frame 3, thereby forming a high pressure in the cavity on the bottom surface of the support frame 3. Since the cavity inside the support frame 3 is connected to the air pressure chamber 64 through the trachea, the cavity on the bottom surface of the support frame 3 will transport air to the air pressure chamber 64 through the trachea, thereby increasing the air pressure in the air pressure chamber 64.

[0029] The working principle of the present invention is: first, the flange body 8 to be welded is put on the outside of the vertical pipe 2, and the flange body 8 will slide downward along the side of the vertical pipe 2 and press on the top surface of the support frame 3. After the support frame 3 is affected by the gravity of the flange body 8, the support frame 3 will move downward. When the support frame 3 moves downward, since the cavity on the bottom surface of the support frame 3 is put on the outside of the fixing rod 4, the fixing rod 4 will go deeper into the cavity on the bottom surface of the support frame 3. In this process, the fixing rod 4 will reduce the volume of the cavity on the bottom surface of the support frame 3, thereby forming a high pressure in the cavity on the bottom surface of the support frame 3. Since the cavity inside the support frame 3 is connected with the air pressure cavity 64 through the air pipe, the cavity on the bottom surface of the support frame 3 will transport air to the air pressure cavity 64 through the air pipe. , achieving an increase in the air pressure in the air pressure chamber 64. When the air pressure chamber 64 is acted upon by the air pressure, the air pressure chamber 64 will form a high-pressure state, so that the high-pressure air pressure chamber 64 will act on the piston 66, and the piston 66 will act on the second positioning rod 62 through the connecting rod 65, causing the second positioning rod 62 to move toward the end away from the first positioning rod 61. In addition, since a transmission gear 67 is installed at the end of the air pressure chamber 64 through a rotating shaft, when the connecting rod 65 moves, it will act on the first positioning rod 61 through the transmission gear 67, causing the first positioning rod 61 and the second positioning rod 62 to move synchronously in opposite directions, thereby ensuring that the first positioning rod 61 and the second positioning rod 62 are synchronously moved out of the riser 2 and act on the inner side surface of the flange body 8;

[0030] At the same time, during the downward movement of the support frame 3, since the first gear is engaged with the side surface of the support frame 3, the first gear will be driven to rotate counterclockwise during the downward movement of the support frame 3. Since the gear is connected to the second gear through a toothed belt, the second gear will also rotate counterclockwise. At the same time, since the second gear is connected to the third gear through a toothed belt, the third gear is engaged with the bottom surface of the first positioning rod 61, the third gear will drive the first positioning rod 61 toward the outside of the riser 2, and cooperate with the air pressure drive of the air pressure chamber 64 to achieve dual control to ensure the positioning of the flange body 8.

[0031] The above is a detailed description of an embodiment of the present invention. However, the content described is only a preferred embodiment of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A welding fixture for flange processing, characterized in that: include: A base (1), wherein a vertical pipe (2) is fixedly connected to the middle position of the top surface of the base (1); A support frame (3), the support frame (3) being arranged on the top surface of the base (1) near the side of the standpipe (2); A positioning mechanism (6), wherein the positioning mechanism (6) is arranged on the side of the vertical pipe (2), and the support frame (3) converts the gravity of the flange body (8) into an extrusion force acting on the positioning mechanism (6) after being acted upon by the gravity of the flange body (8), so that the positioning mechanism (6) acts on the inner side of the flange body (8); The number of the support frames (3) is at least two groups, a fixing rod (4) is fixedly connected to the bottom of the support frame (3) near the inside of the base (1), and a cavity is provided at the bottom of the support frame (3) to fit with the fixing rod (4); The positioning mechanism (6) includes a plurality of groups of first positioning rods (61) and second positioning rods (62), and connecting rods (65) are provided at opposite ends of the first positioning rods (61) and the second positioning rods (62). One end of the connecting rod (65) is fixedly connected to the second positioning rod (62), and the other end of the connecting rod (65) is fixedly connected to a piston (66). A transmission gear set (5) is meshed with the side surface of the support frame (3), and one end of the transmission gear set (5) away from the support frame (3) is meshed with the bottom surface of the first positioning rod (61).

2. A welding fixture for flange processing according to claim 1, characterized in that: An air pressure chamber (64) is provided in the interior of the first positioning rod (61) near the piston (66), and the air pressure chamber (64) is fitted with the piston (66). A transmission gear (67) is installed at the end of the air pressure chamber (64) through a rotating shaft. One side of the transmission gear (67) is meshed with the inner wall of the air pressure chamber (64), and the other side of the transmission gear (67) is meshed with the side surface of the connecting rod (65).

3. A welding fixture for flange processing according to claim 2, characterized in that: The outer ends of the first positioning rod (61) and the second positioning rod (62) are both fixedly connected to a rubber head (63).

4. A welding fixture for flange processing according to claim 2, characterized in that: The cavity inside the support frame (3) is connected to the air pressure cavity (64) via an air pipe.

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