Welding tool and method for metal pipe body

Abstract

The invention relates to the technical field of welding tool equipment, and discloses a metal pipe body welding tool which comprises a supporting ring I movably connected to a metal pipe body I in a sleeving mode, a supporting ring II movably connected to a metal pipe body II in a sleeving mode and an electromagnetic device magnetically attracted to the metal pipe body I. And connecting plates are uniformly and fixedly connected to the outer side surfaces of the supporting ring I and the supporting ring II. Through the arrangement of a supporting ring I and an electromagnetic device, the supporting ring I carries a welding gun to clamp the outside of a metal pipe body I, meanwhile, the electromagnetic device is limited by a limiting clamping plate and a connecting hinge, it can be ensured that the circle centers of the metal pipe body I and the supporting ring I are located on the same straight line when the metal pipe body I is clamped, and therefore during welding, the metal pipe body I is not prone to being damaged. When the welding gun rotates around the right end face of the metal pipe body I for welding, the distance between the end of the welding gun and a welding point between the metal pipe body I and the metal pipe body II is kept at a relatively uniform distance, and then the welding quality is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of welding tooling equipment, in particular to a welding tooling and method for a metal pipe body. Background Art

[0002] Metal pipe fittings are usually made of metal, such as carbon steel, stainless steel, etc. When connecting these pipe fittings with other pipe fittings, they are generally welded. Welding is to melt the metal by heating, so that the metal at the interface of the pipe body is melted into one body and then cooled to form a connection. This connection has a good connection effect. At present, manual handheld welding equipment is generally used for pipeline welding, and some metal pipes with larger diameters are welded with internal welding machines. There are some shortcomings in the use of these two methods, as follows:

[0003] When manually welding the pipe body, an external support structure is required to limit the support of the two pipe bodies when the two pipe bodies are butt-jointed. The operation is cumbersome, and the circular pipe is not convenient for manual welding. Internal welding is limited by its volume and can only be used for welding large-diameter metal pipes. For pipes with smaller diameters, the internal welding machine cannot enter, and welding can only be done manually, resulting in a low welding rate. Summary of the invention

[0004] The present invention provides a welding tool for a metal pipe body, which has the advantages of quickly clamping and installing the welding part of the metal pipe and quickly completing the welding of the pipe body, thereby solving the problems in the above-mentioned background technology.

[0005] The present invention provides the following technical solutions: a welding tool for a metal pipe body, comprising a support ring I movably sleeved on a metal pipe body I, a support ring II movably sleeved on a metal pipe body II, and an electromagnetic device magnetically attracted on the metal pipe body I, the outer sides of the support ring I and the support ring II are uniformly fixedly connected with a connecting plate, the inner sides of the support ring I and the support ring II are provided with a movable groove, a connecting rod is movably sleeved in the movable groove, and a connecting rod is uniformly fixedly connected between two connecting rings, there are eight electromagnetic devices, and four are in a group, and a group of electromagnetic devices located on the left is uniformly distributed on the metal pipe body I, and the side of the electromagnetic device close to the metal pipe body I is arc-shaped, and a limit clamping plate is fixedly installed on the electromagnetic device symmetrically on the left and right, a clamping groove is provided inside the limit clamping plate, and the clamping groove is movably clamped with the connecting plate, and a connecting hinge is movably connected between two adjacent electromagnetic devices through an axis, and a driving device is uniformly and movably installed on the support ring I and the support ring II, a limit sleeve is movably installed between the two driving devices, and a welding gun is movably sleeved on the limit sleeve.

[0006] Preferably, the driving device includes a supporting box and a belt conveying device, the interior of the supporting box is fixedly installed with a driving gear which is movably installed on the supporting box and located on the inner side of the supporting ring I, the inner side of the supporting ring I is fixedly sleeved with a gear ring, the driving gear is meshed with the inner gear ring of the supporting ring I, the output shaft of the driving motor is fixedly sleeved with the pulley of the belt conveying device, and the shaft end of the driving gear is fixedly sleeved with another pulley.

[0007] Preferably, a sliding ring is movably connected in the slot of the limit clamp plate located outside the electromagnetic device, and a supporting device is movably connected to the sliding ring, and the supporting device includes a buckle. The inner side of the sliding ring is evenly provided with slots, and the buckle is movably connected to the slot of the sliding ring through a screw. A power connection box is fixedly installed on the buckle and located outside the sliding ring, and a stainless steel bellows is fixedly connected to the power connection box. The interior of the stainless steel bellows is filled with electrorheological fluid, and the power connection box is electrically connected to the electrorheological fluid in the inner cavity of the stainless steel bellows through a wire.

[0008] Preferably, two supporting devices are movably mounted on one of the sliding rings, the cross section of the stainless steel bellows is square, and the ends of the stainless steel bellows are fixedly connected with a connector.

[0009] Preferably, the support ring I and the support ring II have the same specifications, the support ring I and the sliding ring have the same diameter, and the diameter of the metal tube body I is smaller than the diameter of the support ring I.

[0010] A welding method for a metal pipe body, characterized by the following steps:

[0011] S: Sleeve the left sliding ring and support ring I on the right end of the metal tube body I, then energize a group of electromagnetic devices on the left, then the electromagnetic devices generate magnetic force and adsorb the metal tube body I, four electromagnetic devices adsorb the metal tube body I at the same time, and the magnetic attraction force is the same, so the center of the support ring I and the center of the metal tube body I are on the same horizontal line, then if the right end of the metal tube body I is in a suspended state and the distance from the ground is no more than two meters, fold the stainless steel bellows into an L shape and contact the ground, then the electrical box energizes the electrorheological fluid inside the stainless steel bellows, so that the electrorheological fluid becomes solid, thereby forming a support, and completing the initial clamping;

[0012] S: Insert the left end of the metal tube body II into the support ring II, and energize another set of electromagnetic devices to clamp and position the metal tube body II. At the same time, the sliding ring at the bottom of the metal tube body II forms a support at the bottom of the metal tube body II.

[0013] S: When clamping, place the welding gun directly above the connection between metal tube body I and metal tube body II, then adjust the height of the welding gun to bring the welding gun close to the weld. During welding, energize the drive motor, which drives the drive gear to rotate through the belt conveyor. With the cooperation of the gear ring, the welding gun is driven to perform uniform circular motion, and then the gap between metal tube body I and metal tube body II is gradually welded. During this process, the travel speed of the welding gun needs to be controlled to avoid excessive rotation speed.

[0014] The present invention has the following beneficial effects:

[0015] 1. Through the arrangement of the support ring I and the electromagnetic device, the support ring I carries the welding gun to be clamped on the outside of the metal tube body I. At the same time, the electromagnetic device is limited by the limit clamping plate and the connecting hinge, so that when the metal tube body I is clamped, it can be ensured that the center of the circle of the metal tube body I and the support ring I are on the same straight line. Then, during welding, when the welding gun rotates around the right end face of the metal tube body I for welding, the end of the welding gun and the welding point between the metal tube body I and the metal tube body II are kept at a relatively uniform distance, thereby effectively improving the welding quality. In addition, through the arrangement of the two sets of electromagnetic devices, the metal tube body II can be clamped and the left end of the metal tube body II can be supported, so that the metal tube body II can be quickly connected with the metal tube body I, thereby completing the welding and improving the welding rate.

[0016] 2. Through the setting of the sliding ring and the supporting device, the shape of the stainless steel bellows can be adjusted according to the position of the metal tube body I and the metal tube body II. If the metal tube body I and the metal tube body II are in a suspended state and the distance from the ground is not more than two meters, the stainless steel bellows is folded into an L shape and in contact with the ground. Then the electrical box is energized to the electrorheological fluid inside the stainless steel bellows, so that the electrorheological fluid becomes solid, thereby forming a support. If there are suspendable objects on the side or above the metal tube body I and the metal tube body II, the stainless steel bellows can be wrapped around the suspending object, and then energized to suspend the metal tube body I and the metal tube body II, so as to ensure that the welding is in a relatively horizontal posture, create a good welding space, improve the welding quality and efficiency, and increase the strength of the tooling structure. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 2 It is a partial schematic diagram of the overall structure of the present invention;

[0019] Figure 3 It is a front view schematic diagram of the structure of the present invention;

[0020] Figure 4 It is a front view schematic diagram of the structure of the present invention;

[0021] Figure 5 It is a schematic side view of the structure of the present invention;

[0022] Figure 6 The structure of the present invention Figure 4 The enlarged schematic diagram at A in the middle;

[0023] Figure 7 This is a schematic diagram of the stainless steel bellows suspension structure of the present invention.

[0024] In the figure: 1. Metal tube body I; 2. Metal tube body II; 3. Support ring I; 4. Support ring II; 5. Connecting plate; 6. Electromagnetic device; 7. Limiting card plate; 8. Connecting hinge; 9. Driving device; 91. Support box; 92. Driving motor; 93. Driving gear; 94. Belt conveyor; 10. Limiting sleeve; 11. Welding gun; 12. Connecting ring; 13. Connecting rod; 14. Sliding ring; 15. Support device; 16. Buckle; 17. Electrical box; 18. Stainless steel bellows; 19. Connecting head. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0026] See also Figure 1-Figure 4A welding tool for a metal pipe body, comprising a support ring I3 movably sleeved on a metal pipe body I1, a support ring II4 movably sleeved on a metal pipe body II2, and an electromagnetic device 6 magnetically attracted to the metal pipe body I1, the outer sides of the support ring I3 and the support ring II4 are uniformly fixedly connected with a connecting plate 5, the inner sides of the support ring I3 and the support ring II4 are both provided with a movable groove, a connecting rod 13 is movably sleeved in the movable groove, and a connecting rod 13 is uniformly fixedly connected between two connecting rings 12, and there are eight electromagnetic devices 6, and four are in a group, located A group of electromagnetic devices 6 on the left are evenly distributed on the metal tube body Ⅰ1. The side of the electromagnetic device 6 close to the metal tube body Ⅰ1 is arc-shaped. A limit clamping plate 7 is fixedly installed symmetrically on the electromagnetic device 6. A clamping groove is opened inside the limit clamping plate 7. The clamping groove is movably connected with the connecting plate 5. A connecting hinge 8 is movably connected between two adjacent electromagnetic devices 6 through an axis. A driving device 9 is evenly and movably installed on the support ring Ⅰ3 and the support ring Ⅱ4. A limit sleeve 10 is movably installed between the two driving devices 9. A welding gun 11 is movably sleeved on the limit sleeve 10 Before welding the metal tube body Ⅰ1 and the metal tube body Ⅱ2, firstly, a set of electromagnetic devices 6 are connected to the right welding end surface of the metal tube body Ⅰ1, and are energized to make them uniformly adsorbed on the surface of the metal tube body Ⅰ1, so that the uppermost electromagnetic device 6 is at the top of the metal tube body Ⅰ1, and at the same time, the support ring Ⅰ3 is driven to be sleeved on the metal tube body Ⅰ1, and the welding gun 11 is placed directly above the welding point between the metal tube body Ⅰ1 and the metal tube body Ⅱ2, and then the metal tube body Ⅱ2 is sleeved with the support ring Ⅱ4, and the support ring Ⅱ4 at the right side is made to be connected to the metal tube body Ⅰ1. A group of electromagnetic devices 6 at the bottom contacts the metal tube body II2 and adsorbs the metal tube body II2. Since the electromagnetic devices 6 are limited by the limiting clamping plate 7, the four electromagnetic devices 6 are evenly distributed in the circumferential direction of the metal tube body II2, so that the centers of the metal tube body I1 and the metal tube body II2 are on the same straight line, thereby ensuring that the welding part can be accurately butted, avoiding deviation at the connection of the metal tube body, and improving the accuracy of welding. Then the driving device 9 drives the welding gun 11 to rotate in a circle to weld the connection;

[0027] See also Figure 5-Figure 7The driving device 9 includes a supporting box 91 and a belt conveyor 94. A driving gear 93 is fixedly installed inside the supporting box 91 and is movably installed on the inner side of the supporting ring Ⅰ3. A toothed ring is fixedly sleeved on the inner side of the supporting ring Ⅰ3. The driving gear 93 meshes with the inner toothed ring of the supporting ring Ⅰ3. The output shaft of the driving motor 92 is fixedly sleeved with the pulley of the belt conveyor 94. The shaft end of the driving gear 93 is fixedly sleeved with another pulley. After the metal tube body Ⅰ1 and the metal tube body Ⅱ2 are aligned, the driving motor 92 is energized. The driving motor 92 drives the driving gear 93 to rotate through the belt conveyor 94. With the cooperation of the toothed ring, the welding gun 11 is driven to perform uniform circular motion, thereby gradually welding the metal. The gap between the metal tube body Ⅰ1 and the metal tube body Ⅱ2 is welded. In this process, the travel speed of the welding gun 11 needs to be controlled to avoid too fast rotation speed, which will lead to inadequate welding and unreliable connection. A sliding ring 14 is movably connected in the slot of the limit clamping plate 7 located on the outer side of the electromagnetic device 6, and a supporting device 15 is movably connected on the sliding ring 14. The supporting device 15 includes a buckle 16. The inner side of the sliding ring 14 is evenly provided with a slot. The buckle 16 is movably connected to the slot of the sliding ring 14 through a screw. A power connection box 17 is fixedly installed on the buckle 16 and located on the outer side of the sliding ring 14. A stainless steel bellows 18 is fixedly connected to the power connection box 17. The interior of the stainless steel bellows 18 is filled with electrorheological fluid. The power connection box 17 is connected by a conductive The wire is electrically connected to the electrorheological fluid in the inner cavity of the stainless steel bellows 18, and the shape of the stainless steel bellows 18 is adjusted according to the position of the metal tube body Ⅰ1 and the metal tube body Ⅱ2. If the metal tube body Ⅰ1 and the metal tube body Ⅱ2 are in a suspended state and the distance from the ground is not more than two meters, the stainless steel bellows 18 is folded into an L shape and in contact with the ground. Then the electrical box 17 energizes the electrorheological fluid inside the stainless steel bellows 18 to make the electrorheological fluid become solid, thereby forming a support. If there are objects that can be suspended on the side or above the metal tube body Ⅰ1 and the metal tube body Ⅱ2, the stainless steel bellows 18 can be wrapped around the suspended object, and then energized to suspend the metal tube body Ⅰ1 and the metal tube body Ⅱ2 to ensure that the welding is in a relatively watertight state. A flat posture creates a good welding space and improves welding quality and efficiency; two supporting devices 15 are movably installed on a sliding ring 14, the cross section of the stainless steel bellows 18 is square, and the end of the stainless steel bellows 18 is fixedly connected with a connector 19, and a triangular support is formed by combining two stainless steel bellows 18 to provide better supporting force. At the same time, since the cross section of the stainless steel bellows 18 is square, a certain contact surface can be formed at the bottom after bending to ensure the stability of the support, and the connector 19 at the tail of the stainless steel bellows 18 can be connected to external tooling such as a lock buckle, an extension rod, etc., and according to the situation around the welding place, the metal pipe body Ⅰ1 and the metal pipe body Ⅱ2 are fixed by supporting or hanging;The specifications of the support ring I3 and the support ring II4 are the same, the diameters of the support ring I3 and the sliding ring 14 are the same, the diameter of the metal tube body I1 is smaller than the diameter of the support ring I3, and this welding fixture is used for welding small-diameter metal tube bodies. The electromagnetic device 6 is limited by the support ring I3 and the limiting clamp 7, so that after the four electromagnetic devices 6 adsorb the metal tube body I1, the support ring I3 of the metal tube body I1 always keeps the center of the circle. ;

[0028] Working principle, clamping: the left sliding ring 14 and the support ring Ⅰ3 are sleeved on the right end of the metal tube body Ⅰ1, and then a group of electromagnetic devices 6 on the left are energized, and then the electromagnetic device 6 generates magnetic force and adsorbs the metal tube body Ⅰ1. The four electromagnetic devices 6 adsorb the metal tube body Ⅰ1 at the same time, and the magnetic attraction force is the same, so the center of the support ring Ⅰ3 and the center of the metal tube body Ⅰ1 are on the same horizontal line. Then, if the right end of the metal tube body Ⅰ1 is in a suspended state and the distance from the ground is no more than two meters, the stainless steel bellows 18 is folded into an L shape and in contact with the ground. Then the electrical box 17 energizes the electrorheological fluid inside the stainless steel bellows 18, so that the electrorheological fluid becomes solid, thereby forming a support, and completing the initial clamping;

[0029] Subsequently, the left end of the metal tube body II2 is inserted into the support ring II4, and the electromagnetic device 6 is energized to clamp and position the metal tube body II2. At the same time, the sliding ring 14 at the bottom of the metal tube body II2 forms a support at the bottom of the metal tube body II2.

[0030] Welding: When clamping, make the welding gun 11 just above the connection between the metal tube body Ⅰ1 and the metal tube body Ⅱ2, then adjust the height of the welding gun 11, so that the welding gun 11 is close to the weld. When welding, energize the drive motor 92, and the drive motor 92 drives the drive gear 93 to rotate through the belt conveyor 94. With the cooperation of the gear ring, the welding gun 11 is driven to perform uniform circular motion, and then the gap between the metal tube body Ⅰ1 and the metal tube body Ⅱ2 is gradually welded. In this process, the travel speed of the welding gun 11 needs to be controlled to avoid excessive rotation speed.

Claims

1. A welding tool for a metal pipe, comprising a support ring I (3) movably sleeved on a metal pipe I (1), a support ring II (4) movably sleeved on a metal pipe II (2), and an electromagnetic device (6) magnetically attracted to the metal pipe I (1), characterized in that: The outer side surfaces of the support ring I (3) and the support ring II (4) are uniformly and fixedly connected with a connecting plate (5); the inner sides of the support ring I (3) and the support ring II (4) are provided with a movable groove, in which a connecting rod (13) is movably sleeved; a connecting rod (13) is uniformly and fixedly connected between the two connecting rings (12); there are eight electromagnetic devices (6), and four of them form a group; the group of electromagnetic devices (6) located on the left is uniformly distributed on the metal tube body I (1); the electromagnetic devices (6) are close to the metal tube body I (1) One side of the electromagnetic device (6) is arc-shaped, a limit clamping plate (7) is fixedly installed symmetrically on the left and right sides of the electromagnetic device (6), a clamping groove is provided inside the limit clamping plate (7), and the clamping groove is movably connected to the connecting plate (5), and a connecting hinge (8) is movably connected between two adjacent electromagnetic devices (6) through an axis, and a driving device (9) is evenly and movably installed on the support ring I (3) and the support ring II (4), and a limit sleeve (10) is movably installed between the two driving devices (9), and a welding gun (11) is movably sleeved on the limit sleeve (10).

2. A welding tool for a metal pipe according to claim 1, characterized in that: The driving device (9) comprises a supporting box (91) and a belt conveying device (94); a driving gear (93) is fixedly mounted inside the supporting box (91) and movably mounted on the inner side of the supporting ring I (3); a toothed ring is fixedly sleeved on the inner side of the supporting ring I (3); the driving gear (93) meshes with the toothed ring on the inner side of the supporting ring I (3); the output shaft of the driving motor (92) is fixedly sleeved on the pulley of the belt conveying device (94); and the shaft end of the driving gear (93) is fixedly sleeved on another pulley.

3. A welding tool for a metal pipe according to claim 1, characterized in that: A sliding ring (14) is movably connected in a slot of the limit clamping plate (7) located outside the electromagnetic device (6), and a supporting device (15) is movably connected to the sliding ring (14). The supporting device (15) includes a buckle (16). The inner side of the sliding ring (14) is evenly provided with a slot, and the buckle (16) is movably connected to the slot of the sliding ring (14) through a screw. A power connection box (17) is fixedly installed on the buckle (16) and located outside the sliding ring (14). A stainless steel bellows (18) is fixedly connected to the power connection box (17). The interior of the stainless steel bellows (18) is filled with an electrorheological fluid. The power connection box (17) is electrically connected to the electrorheological fluid in the inner cavity of the stainless steel bellows (18) through a wire.

4. A welding tool for a metal pipe according to claim 3, characterized in that: Two supporting devices (15) are movably mounted on one of the sliding rings (14); the cross section of the stainless steel bellows (18) is square; and a connector (19) is fixedly connected to the end of the stainless steel bellows (18).

5. The metal pipe welding tool according to claim 3, characterized in that: The support ring I (3) and the support ring II (4) have the same specifications, the support ring I (3) and the sliding ring (14) have the same diameter, and the diameter of the metal tube body I (1) is smaller than the diameter of the support ring I (3).

6. A metal pipe welding method according to any one of claims 1 to 5, characterized in that Here are the steps: S1: The left sliding ring (14) and the support ring I (3) are sleeved on the right end of the metal tube body I (1), and then a group of electromagnetic devices (6) on the left are energized, and then the electromagnetic devices (6) generate magnetic force and adsorb the metal tube body I (1). The four electromagnetic devices (6) adsorb the metal tube body I (1) at the same time, and the magnetic attraction forces are the same, so the center of the support ring I (3) and the center of the metal tube body I (1) are on the same horizontal line. Then, if the right end of the metal tube body I (1) is in a suspended state and the distance from the ground is not more than two meters, the stainless steel bellows (18) is folded into an L shape and contacted with the ground. Then, the electrical box (17) energizes the electrorheological fluid inside the stainless steel bellows (18), so that the electrorheological fluid becomes solid, thereby forming a support, and completing the initial clamping; S2: insert the left end of the metal tube body II (2) into the support ring II (4), and similarly energize another set of electromagnetic devices (6) to clamp and position the metal tube body II (2). At the same time, the sliding ring (14) located at the bottom of the metal tube body II (2) forms a support at the bottom of the metal tube body II (2); S3: When clamping, the welding gun (11) is placed directly above the connection between the metal tube body I (1) and the metal tube body II (2), and then the height of the welding gun (11) is adjusted so that the welding gun (11) is close to the weld. When welding, the driving motor (92) is powered on, and the driving motor (92) drives the driving gear (93) to rotate through the belt conveyor (94). With the cooperation of the gear ring, the welding gun (11) is driven to perform uniform circular motion, and then the gap between the metal tube body I (1) and the metal tube body II (2) is gradually welded. During this process, the travel speed of the welding gun (11) needs to be controlled to avoid excessive rotation speed.

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