Welding device and method for metal corrugated pipe production

Abstract

The invention discloses a welding device and method for metal corrugated pipe production, and relates to the technical field of metal pipe production. A sliding rail is arranged at the top of the base, a collecting box is arranged on one side of the back of the sliding rail, two linkage plates are symmetrically arranged in the sliding rail, an L-shaped plate is arranged at the edge of the top of the base, an annular rail is arranged on the side, close to the axis of the base, of the L-shaped plate, and a welding assembly is arranged in the annular rail. Two deviation prevention devices are symmetrically arranged on the top of the base, and anti-falling devices are arranged on the inner sides of the deviation prevention devices. By means of the inclined plate and the round roller, it is guaranteed that a pipe entering the limiting ring is located in the center of the interior of the limiting ring all the time, the phenomenon of slight deviation in the pipe alignment process is avoided, and workers need to observe the deviated direction with the naked eyes so that manual adjustment can be conducted; and the alignment accuracy between the two pipes is effectively improved, and the welding preparation time is shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of metal pipe production, in particular to a welding device and method for producing metal corrugated pipes. Background Art

[0002] Metal bellows is a kind of wavy pipe with regular shape. It is widely used in high-tech fields such as semiconductor manufacturing, national defense research, aerospace, etc. Metal bellows are often processed and produced with welding devices. Usually, two metal bellows are aligned and then welded with the welding device. With the development of production technology, the welding quality is also constantly improving.

[0003] The patent with patent announcement number CN218193540U discloses a welding device for the production of metal bellows, which belongs to the field of bellows processing technology. The patent includes a base frame and a welding assembly, a vertical plate is fixedly connected to the base frame, and a driving mechanism is fixedly connected to the surface of the vertical plate; a pair of sliding rods are fixedly connected to the base frame, one end of the sliding rod is fixedly connected to a fixed plate, and the fixed plate is fixedly connected to a clamping seat for clamping and fixing the metal bellows; a sliding plate is slidably connected to the sliding rod, and a clamping seat for clamping and fixing another metal bellows is fixedly connected to the sliding plate, and a fixing rod is fixedly connected to the side of the sliding plate, one end of the fixing rod is movably connected to a connecting block, and a spring is connected to the surface of the fixing rod; a pushing cylinder is fixedly connected to the base frame, and the piston rod of the pushing cylinder is fixedly connected to the connecting block; the patent uses the elastic force of the spring to make the two metal bellows closely aligned, thereby solving the problem that the metal bellows cannot be closely aligned during welding.

[0004] However, the device still has some shortcomings: it can align two metal bellows tightly for welding, but slight deviations are prone to occur during the alignment of the pipes, requiring staff to observe the deviation position with the naked eye and adjust it manually. To a certain extent, it is difficult to ensure the alignment accuracy between the two pipes and prolongs the preparation time before welding, which easily leads to reduced welding efficiency. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention provides a welding device and method for producing metal bellows, which solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A welding device for producing metal bellows, comprising a base, a slide rail provided on the top of the base, a collection box provided on the back side of the slide rail, two linkage plates symmetrically provided inside the slide rail, an L-shaped plate provided at the top edge of the base, an annular track provided on the side of the L-shaped plate close to the axis of the base, and a welding assembly provided inside the annular track; Two anti-deviation devices are symmetrically arranged on the top of the base, an anti-falling device is arranged inside the anti-deviation device, and an anti-obstruction device is arranged inside the anti-falling device; The anti-deviation device includes two U-groove plates, and the bottoms of the inner walls of the two U-groove plates are fixedly installed on the top of the linkage plate, the bottoms of the U-groove plates are in contact with the top of the base, and a limiting ring is fixedly installed on the top of the U-groove plate. A number of elastic telescopic rods are equidistantly installed inside the limiting ring, and an arc-shaped splint is fixedly installed on the side of the elastic telescopic rod close to the center of the limiting ring. A rubber block is fixedly installed inside the square groove of the arc-shaped splint, and a number of inclined plates are equidistant and hinged on the side of the limiting ring away from the center of the base, and a U-shaped groove is opened on the end of the inclined plate away from the limiting ring, a round roller is rotatably installed inside the U-shaped groove of the inclined plate, and a heating component is fixedly installed on the side of the U-groove plate away from the axis of the base.

[0007] According to the above technical solution, the fixed ends of several elastic telescopic rods are equidistantly distributed inside the limit ring, and the arc-shaped splint is provided with a square groove on the side close to the center of the limit ring. Torsion springs are provided between several inclined plates and the limit ring. The metal bellows is first placed inside the limit ring. At this time, the U-groove plate limits and stabilizes the limit ring. In the process of the pipe moving horizontally from the outside to the center of the base to the inside of the limit ring, the outer wall of the pipe first contacts the outer wall of the circular roller. The outer wall of the circular roller generates a rotational force through the force of the pipe movement and the friction of its outer wall. When the circular roller rotates inside the inclined plate, it is convenient for the pipe to enter the inside of the inclined plate close to the center of the limit ring. At the same time, the resistance force generated on the inclined plate by pipes of different diameters is different. When the inclined plate is subjected to the resistance force, its own hinge shaft starts to rotate, and drives the inclined plate to flip in the direction away from the center of the limit ring. At the same time, the inclined plate is The restriction forces the circular roller to always fit the outer wall of the pipe. At the same time, the heating component on the outer wall of the U-groove plate is pre-started to dissipate heat. Subsequently, the slide rail drives the U-groove plates on both sides to move toward the center of the base through the linkage plate. The U-groove plate drives the heating component to move synchronously to expand the heating range. When the welding points of the pipes on both sides are docked inside the annular track, the annular track drives the welding component to make a circular motion inside itself and weld the pipe in a circular motion. After the pipe enters the limit ring, it contacts the arc surface of the outer wall of the arc splint. During the movement of the pipe, it will resist the arc splint to move away from the center of the limit ring. The arc splint resists the telescopic end of the elastic telescopic rod and contracts synchronously. The setting of the built-in spring of the elastic telescopic rod causes the concave surface of the arc splint to always fit closely to the outer wall of the pipe, that is, the rubber block always fits the outer wall of the pipe, thereby increasing the friction between the arc splint and the pipe.

[0008] According to the above technical solution, the anti-falling device includes a transmission plate, a circular slotted frame, a sliding plate and a telescopic arc plate. The bottom of the transmission plate is hinged to the side of the heating component close to the center of the base through a torsion spring. The bottom of the circular slotted frame is fixedly installed at the top edge of the base. Both sides of the sliding plate are slidably installed inside the circular slotted frame. The telescopic end of the telescopic arc plate is hinged to the side of the sliding plate close to the axis of the base away from the axis of the base.

[0009] According to the above technical solution, the sliding plate is hinged to the top of the transmission plate on the side away from the center of the base, and a torsion spring is arranged between the telescopic end of the telescopic arc plate and the sliding plate. The telescopic end of the telescopic arc plate is located inside the circular slotted frame. When the heating component moves toward the center of the base, it drives the transmission plate to move synchronously. The top of the transmission plate is limited by the sliding plate, causing its own hinge shaft to start rotating. The transmission plate drives the sliding plate to slide upward along the inner wall of the circular slotted frame, and the sliding plate drives the telescopic arc plate to move upward. After the concave surface of the fixed end of the telescopic arc plate contacts the outer wall of the pipe, an upward pulling force is applied to it, and when the diameter of the pipe is too large, a friction force will be generated between the telescopic arc plate and the telescopic arc plate. At this time, the hinge shaft of the telescopic arc plate starts to rotate and causes the telescopic end of the telescopic arc plate to start extending.

[0010] According to the above technical solution, the anti-fall device also includes a heat-conducting component, a hot air gun, a spiral hose and a semicircular guide plate. The heat-conducting component is fixedly installed on the outer wall of the sliding plate near the center of the base, and the hot air gun is fixedly installed inside the heat-conducting component at one end away from the axis of the base. The spiral hose is connected and fixedly installed between the heat-conducting component and the heating component. The bottom of the semicircular guide plate is fixedly installed on the top of the heat-conducting component. When the sliding plate moves upward, it drives the heat-conducting component to move synchronously. The heat-conducting component drives the hot air gun to move synchronously and pulls the spiral hose to deform synchronously. The heating component directly inputs heat into the heat-conducting component through the spiral hose. At this time, the heat-conducting component is centered through the hot air gun to be closer to the end of the pipe to be welded, and the centered heating range of the pipe is expanded when the heat-conducting component moves, and the semicircular guide plate guides the heat in a ring through its own concave surface to reduce the heat loss rate.

[0011] According to the above technical solution, the anti-obstruction device includes a U-shaped plate, a rotating rod, a cam and a U-shaped telescopic brush plate. The top of the U-shaped plate is fixedly installed on the bottom of the semicircular guide plate, the bottom of the rotating rod is rotatably installed on the top of the base, the cam passes through and is fixedly installed on the outer wall of the bottom end of the rotating rod, and the U-shaped telescopic brush plate is slidably installed on the top of the base near the bottom of one end of the rotating rod through a spring.

[0012] When the cam no longer contacts the curved surface of the U-shaped telescopic brush plate, the U-shaped telescopic brush plate is reset by the spring force and reciprocates like this. At the same time, the U-groove plate contacts the telescopic end of the U-shaped telescopic brush plate and contracts during the movement.

[0013] According to the above technical solution, the anti-obstruction device also includes a telescopic column, a plurality of arc panels, an activated carbon plate and a resistance plate. The bottom of the telescopic column is fixedly mounted on the top of the rotating rod. The outer wall of the telescopic end of the telescopic column movably passes through the top of the U-shaped plate. Several of the arc panels are equidistant and fixedly mounted on the outer wall of the telescopic end of the telescopic column. The outer wall of the activated carbon plate is slidably mounted on the inner wall of the semicircular guide plate through a spring. The resistance plate is fixedly mounted on the inner wall of the activated carbon plate away from the telescopic column. The arc surface of the resistance plate is located on the movement trajectory of the arc panel. When the rotating rod rotates, the telescopic column is driven to rotate, and an upward impact is generated on the arc panel during the upward movement of the U-shaped plate. The thrust of the arc panel pulls the telescopic end of the telescopic column to move synchronously, and the telescopic end of the telescopic column drives the arc panel to rotate. During the rotation of the arc panel, the semicircular guide plate drives the activated carbon plate to move upward synchronously, and the activated carbon plate drives the resistance plate to move synchronously, so that the resistance plate is always located on the movement trajectory of the arc panel. Therefore, during the rotation of the arc panel, its own arc surface contacts the arc surface of the resistance plate to promote its movement. At this time, the resistance plate pulls the activated carbon plate to slide along the concave surface of the semicircular guide plate. As the arc guide angle between the resistance plate and the arc panel gradually increases, the arc panel will pass over the resistance plate. At this time, the activated carbon plate is reset by the spring force, and this cycle repeats.

[0014] A method for using a welding device for producing a metal bellows comprises the following steps: S1: First, place the metal bellows into the limiting ring. At this time, the U-groove plate stabilizes the limiting ring. When the pipe moves horizontally from the outside to the center of the base and then into the limiting ring, the outer wall of the pipe first contacts the outer wall of the circular roller. The outer wall of the circular roller generates a rotational force through the force of the pipe movement and the friction of its outer wall. S2: When the roller rotates inside the inclined plate, it facilitates the pipe to enter the inner part of the inclined plate near the center of the limit ring. At the same time, the resistance force exerted on the inclined plate by pipes of different diameters is different. When the inclined plate is subjected to the resistance force, its own hinge axis begins to rotate, driving the inclined plate to flip away from the center of the limit ring. At the same time, the inclined plate is restricted by the torsion spring to ensure that the roller always fits the outer wall of the pipe. S3: At the same time, the heating components on the outer wall of the U-groove plate are pre-activated to dissipate heat. Subsequently, the slide rail drives the U-groove plates on both sides to move toward the center of the base through the linkage plate. The U-groove plates drive the heating components to move synchronously to expand the heating range. When the welding points of the pipes on both sides are butted inside the circular track, the circular track drives the welding components to perform circular motion inside itself, and performs circular motion welding on the pipes. S4: After the pipe enters the limit ring, it contacts the outer wall arc surface of the arc splint. During the movement of the pipe, it will resist the arc splint and move away from the center of the limit ring. The arc splint resists the telescopic end of the elastic telescopic rod and shrinks synchronously. The built-in spring of the elastic telescopic rod is set to make the concave surface of the arc splint always close to the outer wall of the pipe, that is, the rubber block always fits the outer wall of the pipe, thereby increasing the friction between the arc splint and the pipe.

[0015] The present invention provides a welding device and method for producing metal bellows, which has the following beneficial effects: (1) The present invention uses the setting of the anti-deviation device, and cooperates with the U-groove plate, the limit ring, the elastic telescopic rod, the arc-shaped clamping plate, the rubber block, the inclined plate, the round roller and the heating component to uniformly preheat the welding area. At the same time, the inclined plate and the round roller ensure that the pipe entering the limit ring is always located at the center of the limit ring, avoiding slight deviation during the pipe alignment process, and requiring the staff to observe the deviation direction with the naked eye and adjust it manually, effectively improving the alignment accuracy between the two pipes and shortening the welding preparation time; and promoting the arc-shaped clamping plate inside the limit ring to adaptively clamp pipes of different diameters, and the rubber block enhances the clamping stability of the arc-shaped clamping plate on the pipe, and cooperates with the round roller to expand the contact range with the outer wall of the pipe, further improving the stability of the pipe during horizontal welding, and effectively preventing the pipe from shaking during welding and thus causing docking misalignment.

[0016] (2) The present invention realizes the adaptive lifting of the telescopic arc plate on pipes of different diameters by setting up an anti-falling device through the cooperation of a heating component, a transmission plate, a circular slotted frame, a sliding plate, a telescopic arc plate, a heat-conducting component, a hot air gun, a spiral hose and a semicircular guide plate, thereby preventing the phenomenon of falling due to excessive weight at one end, improving the practicality of the equipment and broadening the scope of application, avoiding the force of the pipe being offset due to the vibration of the equipment during the welding process, and further improving the docking stability of the pipe; at the same time, the hot air gun is used to perform rapid heat treatment on the pipe to ensure that the welded part of the pipe is evenly heated, avoiding the stress concentration at the pipe welding part during the direct cold welding process, thereby increasing the probability of cracks in the weld, and preventing the flatness of the weld from being reduced due to stress concentration.

[0017] (3) The present invention sets an anti-obstruction device, and cooperates with a semicircular guide plate, a U-shaped plate, a rotating rod, a cam, a U-shaped telescopic brush plate, a telescopic column, an arc plate, an activated carbon plate and a resistance plate to prompt the U-shaped telescopic brush plate to push the welding debris or external dirt dropped from the inside of the slide rail to the inside of the collection box on the outer wall of the slide rail, thereby ensuring the cleanliness of the inside of the slide rail and realizing the centralized collection of dirt, avoiding the accumulation and solidification of dirt inside the slide rail to interfere with the horizontal stable movement of the U-groove plate, avoiding the solidified dirt affecting the stability of the U-groove plate during movement, and preventing the pipe from deviating from the center of the limit ring; and relying on the activated carbon plate to slide back and forth on the inner wall of the semicircular guide plate, effectively expanding the range of movement of the activated carbon plate, relying on the activated carbon plate to purify the harmful gas accumulated inside the semicircular guide plate due to welding smoke before and after the processing, avoiding the untreated harmful gas from deteriorating the processing environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the present invention as a whole; Figure 2 Schematic diagram of the internal structure of the present invention as a whole; Figure 3 Schematic diagram of the anti-deviation device of the present invention; Figure 4 This is a schematic diagram showing the overall anti-deviation device of the present invention; Figure 5 Schematic diagram of the anti-falling device of the present invention; Figure 6 This is a schematic diagram of the anti-fall device according to the present invention from the right side perspective; Figure 7 Schematic diagram of the anti-obstruction device of the present invention; Figure 8 Schematic diagram of the anti-obstruction device of the present invention from the back view.

[0019] In the figure: 1. Base; 2. Slide rail; 21. Interlocking plate; 3. L-shaped plate; 31. Annular track; 32. Welding assembly; 4. Anti-deviation device; 41. U-groove plate; 42. Limiting ring; 43. Elastic telescopic rod; 44. Arc-shaped splint; 45. Rubber block; 46. Inclined plate; 47. Round roller; 48. Heating assembly; 5. Anti-fall device; 51. Transmission plate; 52. Ring slotted frame; 53. Sliding plate; 54. Telescopic arc plate; 55. Heat conduction assembly; 56. Hot air gun; 57. Spiral hose; 58. Semicircular guide plate; 6. Anti-obstruction device; 61. U-shaped plate; 62. Rotating rod; 63. Cam; 64. U-shaped telescopic brush plate; 65. Telescopic column; 66. Arc panel; 67. Activated carbon plate; 68. Contact plate. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] See also Figures 1-8 One embodiment of the present invention is a welding device for producing metal bellows, comprising a base 1, a slide rail 2 disposed on the top of the base 1, a collection box disposed on the back side of the slide rail 2, two linkage plates 21 symmetrically disposed inside the slide rail 2, an L-shaped plate 3 disposed at the top edge of the base 1, an annular track 31 disposed on the side of the L-shaped plate 3 close to the axis of the base 1, and a welding assembly 32 disposed inside the annular track 31; Two anti-deviation devices 4 are symmetrically arranged on the top of the base 1, an anti-falling device 5 is arranged inside the anti-deviation device 4, and an anti-obstruction device 6 is arranged inside the anti-falling device 5; The anti-deviation device 4 includes two U-groove plates 41. The bottom of the inner walls of the two U-groove plates 41 are fixedly installed on the top of the linkage plate 21. The bottom of the U-groove plate 41 contacts the top of the base 1. A limit ring 42 is fixedly installed on the top of the U-groove plate 41. A number of elastic telescopic rods 43 are equidistantly installed inside the limit ring 42. An arc-shaped splint 44 is fixedly installed on the side of the elastic telescopic rod 43 close to the center of the limit ring 42. A rubber block 45 is fixedly installed inside the square groove of the arc-shaped splint 44. A number of inclined plates 46 are equidistantly and hingedly provided on the side of the limit ring 42 away from the center of the base 1, and a U-shaped groove is opened on the end of the inclined plate 46 away from the limit ring 42. A round roller 47 is rotatably installed inside the U-shaped groove of the inclined plate 46. A heating component 48 is fixedly installed on the side of the U-groove plate 41 away from the axis of the base 1.

[0022] The fixed ends of several elastic telescopic rods 43 are equidistantly distributed inside the limit ring 42, and a square groove is opened on the side of the arc-shaped clamping plate 44 near the center of the limit ring 42. Torsion springs are provided between several inclined plates 46 and the limit ring 42. Through the above cooperation, the welding area is uniformly preheated by relying on the heating component 48. At the same time, the inclined plate 46 and the round roller 47 ensure that the pipe entering the limit ring 42 is always located in the center of the limit ring 42, avoiding slight deviation during the pipe alignment process, and requiring the staff to observe the deviation direction with the naked eye and manually adjust it, effectively improving the alignment accuracy between the two pipes and shortening the welding preparation time; through the above cooperation, the arc-shaped clamping plate 44 inside the limit ring 42 is adaptively clamped to pipes of different diameters, and the rubber block 45 enhances the clamping stability of the arc-shaped clamping plate 44 on the pipe, and at the same time cooperates with the round roller 47 to expand the contact range on the outer wall of the pipe, further improving the stability of the pipe during horizontal welding, and effectively preventing shaking during pipe welding and the occurrence of docking misalignment.

[0023] When in use, first put the metal bellows into the limiting ring 42. At this time, the U-groove plate 41 limits and stabilizes the limiting ring 42. In the process of the pipe moving horizontally from the outside to the center of the base 1 to the inside of the limiting ring 42, the outer wall of the pipe first contacts the outer wall of the round roller 47. The outer wall of the round roller 47 generates a rotational force through the force of the pipe movement and the friction of its outer wall. When the round roller 47 rotates inside the inclined plate 46, it is convenient for the pipe to enter the inside of the inclined plate 46 on the side close to the center of the limiting ring 42. At the same time, the resistance force generated by the inclined plate 46 for pipes of different diameters is different. When the inclined plate 46 is subjected to the resistance force, its own hinge shaft begins to rotate. , and drives the inclined plate 46 to flip in the direction away from the center of the limiting ring 42. At the same time, the inclined plate 46 is restricted by the torsion spring to force the round roller 47 to always fit the outer wall of the pipe. At the same time, the heating component 48 on the outer wall of the U-groove plate 41 is pre-started to dissipate heat. The subsequent slide rail 2 drives the U-groove plates 41 on both sides to move toward the center of the base 1 through the linkage plate 21. The U-groove plate 41 drives the heating component 48 to move synchronously to expand the heating range. When the welding parts of the pipes on both sides are butt-jointed inside the annular track 31, the annular track 31 drives the welding component 32 to make an annular motion inside itself, and performs annular motion welding on the pipe. Through the above cooperation The welding area is uniformly preheated by the heating component 48. At the same time, the inclined plate 46 and the round roller 47 ensure that the pipe entering the limiting ring 42 is always located at the center of the limiting ring 42, avoiding slight deviation during the pipe alignment process. The staff needs to observe the deviation direction with the naked eye and adjust it manually, which effectively improves the alignment accuracy between the two pipes and shortens the welding preparation time. After the pipe enters the limiting ring 42, it contacts the outer wall arc surface of the arc splint 44. During the movement of the pipe, it will resist the arc splint 44 and move away from the center of the limiting ring 42. The arc splint 44 resists the elastic telescopic rod 4 The telescopic ends 3 contract synchronously, and the built-in spring of the elastic telescopic rod 43 is set to make the concave surface of the arc clamping plate 44 always close to the outer wall of the pipe, that is, the rubber block 45 always fits the outer wall of the pipe, thereby increasing the friction between the arc clamping plate 44 and the pipe. Through the above cooperation, the arc clamping plate 44 inside the limit ring 42 is prompted to adaptively clamp pipes of different diameters, and the rubber block 45 enhances the clamping stability of the arc clamping plate 44 on the pipe, and cooperates with the round roller 47 to expand the contact range with the outer wall of the pipe, further improving the stability of the pipe during horizontal welding, and effectively preventing shaking during pipe welding and the occurrence of docking misalignment.

[0024] See also Figures 1-8 On the basis of the above embodiment, another embodiment of the present invention further includes an anti-falling device 5; The anti-falling device 5 includes a transmission plate 51, a circular slotted frame 52, a sliding plate 53 and a telescopic arc plate 54. The bottom of the transmission plate 51 is hinged to the side of the heating component 48 close to the center of the base 1 through a torsion spring. The bottom of the circular slotted frame 52 is fixedly installed at the top edge of the base 1. Both sides of the sliding plate 53 are slidably installed inside the circular slotted frame 52. The telescopic end of the telescopic arc plate 54 is hinged to the side of the sliding plate 53 close to the axis of the base 1 away from the axis of the base 1.

[0025] The sliding plate 53 is hinged to the top of the transmission plate 51 on one side away from the center of the base 1. A torsion spring is provided between the telescopic end of the telescopic arc plate 54 and the sliding plate 53. The telescopic end of the telescopic arc plate 54 is located inside the circular slotted frame 52. Through the above cooperation, the telescopic arc plate 54 can adaptively lift pipes of different diameters to prevent one end from falling due to excessive weight, thereby improving the practicality of the equipment and broadening the scope of application, avoiding the force of the pipe being offset due to equipment vibration during welding, and further improving the docking stability of the pipe.

[0026] The anti-fall device 5 also includes a heat-conducting component 55, a hot air gun 56, a spiral hose 57 and a semicircular guide plate 58. The heat-conducting component 55 is fixedly installed on the outer wall of the sliding plate 53 near the center of the base 1, and the hot air gun 56 is fixedly installed inside the heat-conducting component 55 at one end away from the axis of the base 1. The spiral hose 57 is connected and fixedly installed between the heat-conducting component 55 and the heating component 48. The bottom of the semicircular guide plate 58 is fixedly installed on the top of the heat-conducting component 55. Through the above cooperation, the hot air gun 56 is used to quickly heat-treat the pipe to be welded, ensuring that the temperature of the pipe to be welded is evenly increased, avoiding the stress concentration at the pipe welding point during the direct cold welding process, thereby increasing the probability of cracks in the weld, and preventing the stress concentration from reducing the flatness of the weld.

[0027] When in use, the heating component 48 moves toward the center of the base 1, driving the transmission plate 51 to move synchronously. The top of the transmission plate 51 is limited by the sliding plate 53, prompting its own hinge shaft to start rotating. The transmission plate 51 drives the sliding plate 53 to slide upward along the inner wall of the circular slotted frame 52, and the sliding plate 53 drives the telescopic arc plate 54 to move upward. After the concave surface of the fixed end of the telescopic arc plate 54 contacts the outer wall of the pipe, an upward pulling force is applied to it. When the diameter of the pipe is too large, a resistance force is generated between the telescopic arc plate 54. At this time, the hinge shaft of the telescopic arc plate 54 starts to rotate and prompts the telescopic end of the telescopic arc plate 54 to start extending. Through the above cooperation, the telescopic arc plate 54 can achieve adaptive pulling of pipes of different diameters, preventing one end from falling due to excessive weight, improving the practicality of the equipment and broadening the scope of application, avoiding the force of the pipe being offset due to equipment vibration during welding, and further improving The docking stability of the pipes; when the sliding plate 53 moves upward, it drives the heat-conducting component 55 to move synchronously, and the heat-conducting component 55 drives the hot air gun 56 to move synchronously and pulls the spiral hose 57 to deform synchronously. The heating component 48 directly inputs heat into the heat-conducting component 55 through the spiral hose 57. At this time, the heat-conducting component 55 is centered through the hot air gun 56 to heat the pipe closer to the end to be welded, and the heat-conducting component 55 expands the centered heating range of the pipe when it moves, and the semicircular guide plate 58 guides the heat in a ring shape through its own concave surface to reduce the heat loss rate. Through the above cooperation, the hot air gun 56 is used to quickly heat the pipe to ensure that the pipe to be welded is evenly heated, avoiding the stress concentration at the pipe welding point during direct cold welding, thereby increasing the probability of cracks in the weld, and preventing stress concentration from reducing the flatness of the weld.

[0028] See also Figures 1-8 , based on the above embodiment, another embodiment of the present invention further includes an anti-obstruction device 6; The anti-obstruction device 6 includes a U-shaped plate 61, a rotating rod 62, a cam 63 and a U-shaped telescopic brush plate 64. The top of the U-shaped plate 61 is fixedly mounted on the bottom of the semicircular guide plate 58, the bottom of the rotating rod 62 is rotatably mounted on the top of the base 1, the cam 63 passes through and is fixedly mounted on the outer wall of the bottom end of the rotating rod 62, and the U-shaped telescopic brush plate 64 is slidably mounted on the top of the base 1 near the bottom of one end of the rotating rod 62 through a spring.

[0029] The outer wall of the top end of the rotating rod 62 passes through and is threadedly connected to the inside of the U-shaped plate 61, the bottom of the cam 63 contacts the top of the base 1, and the arc surface of the outer wall of the fixed end of the U-shaped telescopic brush plate 64 is located on the movement trajectory of the cam 63. The bottom of the U-shaped telescopic brush plate 64 is away from the bottom of the end of the rotating rod 62 and contacts the bottom of the inner wall of the slide rail 2. Through the above cooperation, the U-shaped telescopic brush plate 64 pushes the welding debris or external dirt dropped from the inside of the slide rail 2 to the inside of the collection box on the outer wall of the slide rail 2, ensuring the cleanliness of the inside of the slide rail 2 and realizing the centralized collection of dirt, avoiding the accumulation of dirt and solidification inside the slide rail 2 to interfere with the horizontal and stable movement of the U-groove plate 41, avoiding the solidified dirt affecting the stability of the U-groove plate 41 during movement, and preventing the pipe from deviating from the center of the limit ring 42.

[0030] The anti-obstruction device 6 also includes a telescopic column 65, a plurality of arc panels 66, an activated carbon plate 67 and a resistance plate 68. The bottom of the telescopic column 65 is fixedly mounted on the top of the rotating rod 62, and the outer wall of the telescopic end of the telescopic column 65 moves through the top of the U-shaped plate 61. The plurality of arc panels 66 are equidistant and fixedly mounted on the outer wall of the telescopic end of the telescopic column 65. The outer wall of the activated carbon plate 67 is slidably mounted on the inner wall of the semicircular guide plate 58 by a spring, and the resistance plate 68 is fixedly mounted on the inner wall of the activated carbon plate 67 away from the telescopic column 65. The arc surface of the resistance plate 68 is located on the movement trajectory of the arc panel 66. Through the above cooperation, the activated carbon plate 67 slides back and forth on the inner wall of the semicircular guide plate 58, effectively expanding the range of movement of the activated carbon plate 67. The activated carbon plate 67 is relied on to purify the harmful gases accumulated inside the semicircular guide plate 58 due to welding smoke before and after the processing, so as to avoid untreated harmful gases from deteriorating the processing environment.

[0031] When in use, the semicircular guide plate 58 drives the U-shaped plate 61 to move synchronously when it moves upward. During the upward movement of the U-shaped plate 61, the internal driving threaded rotating rod 62 at its bottom end generates a rotating force, and the rotating rod 62 begins to rotate along the top of the base 1. The rotating rod 62 drives the cam 63 to rotate. When the cam 63 rotates, it resists the arc surface of the U-shaped telescopic brush plate 64. The U-shaped telescopic brush plate 64 slides along the top of the base 1 toward its back due to the resistance force. The U-shaped telescopic brush plate 64 is located at the bottom of one end of the inner side of the slide rail 2 and scrapes the bottom of the inner wall of the slide rail 2. When the cam 63 no longer resists the arc surface of the U-shaped telescopic brush plate 64, The U-shaped telescopic brush plate 64 is reset by the elastic force of the spring and reciprocates in this way. At the same time, the U-groove plate 41 resists the contraction of the telescopic end of the U-shaped telescopic brush plate 64 during the movement. Through the above cooperation, the U-shaped telescopic brush plate 64 is prompted to push the welding debris or external dirt dropped from the inside of the slide rail 2 to the inside of the collection box on the outer wall of the slide rail 2, ensuring the cleanliness of the inside of the slide rail 2 and realizing the centralized collection of dirt, avoiding the accumulation of dirt and solidification inside the slide rail 2 to interfere with the horizontal stable movement of the U-groove plate 41, avoiding the solidified dirt affecting the stability of the U-groove plate 41 during movement, and preventing the pipe from deviating from the center of the limit ring 42; the rotating rod 6 2 rotates, driving the telescopic column 65 to rotate, and in the process of the U-shaped plate 61 moving upward, an upward thrust is generated on the arc panel 66, and the arc panel 66 pulls the telescopic end of the telescopic column 65 to move synchronously, and the telescopic end of the telescopic column 65 drives the arc panel 66 to rotate. In the process of the arc panel 66 rotating, the semicircular guide plate 58 drives the activated carbon plate 67 to move upward synchronously, and the activated carbon plate 67 drives the resistance plate 68 to move synchronously, so that the resistance plate 68 is always located on the movement trajectory of the arc panel 66. Therefore, during the rotation of the arc panel 66, the arc surface of the arc panel 66 contacts the arc surface of the resistance plate 68 to promote its movement. At this time, the resistance plate 68 Plate 68 pulls the activated carbon plate 67 to slide along the concave surface of the semicircular guide plate 58. As the arc guide angle between the resistance plate 68 and the arc plate 66 gradually increases, the arc plate 66 will pass over the resistance plate 68. At this time, the activated carbon plate 67 is reset by the spring force, and this is repeated repeatedly. Through the above cooperation, the activated carbon plate 67 slides back and forth on the inner wall of the semicircular guide plate 58, effectively expanding the range of movement of the activated carbon plate 67. The activated carbon plate 67 is used to purify the harmful gases accumulated in the semicircular guide plate 58 due to welding smoke before and after the processing, so as to avoid the untreated harmful gases from deteriorating the processing environment.

[0032] A method for using a welding device for producing a metal bellows comprises the following steps: S1: First, place the metal bellows into the limiting ring 42. At this time, the U-groove plate 41 limits and stabilizes the limiting ring 42. When the pipe moves horizontally from the outside to the center of the base 1 and then into the limiting ring 42, the outer wall of the pipe first contacts the outer wall of the roller 47. The outer wall of the roller 47 generates a rotational force through the force of the pipe movement and the friction of its outer wall. S2: When the roller 47 rotates inside the inclined plate 46, it facilitates the pipe to enter the inclined plate 46 on the side close to the center of the limiting ring 42. At the same time, the resistance force exerted on the inclined plate 46 by pipes of different diameters is different. When the inclined plate 46 is subjected to the resistance force, its own hinge axis begins to rotate, and drives the inclined plate 46 to flip away from the center of the limiting ring 42. At the same time, the inclined plate 46 is restricted by the torsion spring to force the roller 47 to always fit the outer wall of the pipe. S3: At the same time, the heating components 48 on the outer wall of the U-groove plate 41 are pre-activated to dissipate heat. Subsequently, the slide rail 2 drives the U-groove plates 41 on both sides to move toward the center of the base 1 through the linkage plate 21. The U-groove plates 41 drive the heating components 48 to move synchronously, thereby expanding the heating range. When the welding points of the pipes on both sides are butted inside the annular track 31, the annular track 31 drives the welding components 32 to perform circular motion inside itself, and performs circular motion welding on the pipes. S4: After the pipe enters the limiting ring 42, it contacts the outer wall arc surface of the arc splint 44. During the movement of the pipe, it will resist the arc splint 44 and move away from the center of the limiting ring 42. The arc splint 44 resists the telescopic end of the elastic telescopic rod 43 and contracts synchronously. The setting of the built-in spring of the elastic telescopic rod 43 prompts the concave surface of the arc splint 44 to always be close to the outer wall of the pipe, that is, the rubber block 45 always fits the outer wall of the pipe, thereby increasing the friction between the arc splint 44 and the pipe.

[0033] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A welding device for producing metal bellows, comprising a base (1), characterized in that: A slide rail (2) is arranged on the top of the base (1), a collection box is arranged on the back side of the slide rail (2), two linkage plates (21) are symmetrically arranged inside the slide rail (2), an L-shaped plate (3) is arranged at the top edge of the base (1), a circular track (31) is arranged on the side of the L-shaped plate (3) close to the axis of the base (1), and a welding assembly (32) is arranged inside the circular track (31); Two anti-deviation devices (4) are symmetrically arranged on the top of the base (1); an anti-falling device (5) is arranged inside the anti-deviation device (4); and an anti-obstruction device (6) is arranged inside the anti-falling device (5); The anti-deviation device (4) comprises two U-groove plates (41), the bottoms of the inner walls of the two U-groove plates (41) are fixedly mounted on the top of the linkage plate (21), the bottoms of the U-groove plates (41) are in contact with the top of the base (1), a limit ring (42) is fixedly mounted on the top of the U-groove plate (41), a plurality of elastic telescopic rods (43) are equidistantly mounted inside the limit ring (42), an arc-shaped clamping plate (44) is fixedly mounted on the side of the elastic telescopic rod (43) close to the center of the limit ring (42), a rubber block (45) is fixedly mounted inside the square groove of the arc-shaped clamping plate (44), a plurality of inclined plates (46) are equidistantly and hingedly mounted on the side of the limit ring (42) away from the center of the base (1), and a U-shaped groove is formed at one end of the inclined plate (46) away from the limit ring (42), a round roller (47) is rotatably mounted inside the U-shaped groove of the inclined plate (46), and a heating component (48) is fixedly mounted on the side of the U-groove plate (41) away from the axis of the base (1).

2. A welding device for producing metal bellows according to claim 1, characterized in that: The fixed ends of the plurality of elastic telescopic rods (43) are equidistantly distributed inside the limiting ring (42), a square groove is provided on one side of the arc-shaped clamping plate (44) close to the center of the limiting ring (42), and a torsion spring is provided between the plurality of inclined plates (46) and the limiting ring (42).

3. A welding device for producing metal bellows according to claim 2, characterized in that: The anti-falling device (5) comprises a transmission plate (51), a circular slotted frame (52), a sliding plate (53) and a telescopic arc plate (54); the bottom of the transmission plate (51) is hinged to a side of the heating component (48) close to the center of the base (1) through a torsion spring; the bottom of the circular slotted frame (52) is fixedly mounted on the top edge of the base (1); both sides of the sliding plate (53) are slidably mounted inside the circular slotted frame (52); and the telescopic end of the telescopic arc plate (54) is hinged to a side of the sliding plate (53) close to the axis of the base (1) at a side away from the axis of the base (1).

4. A welding device for producing metal bellows according to claim 3, characterized in that: The sliding plate (53) is hinged to the top of the transmission plate (51) at one side away from the center of the base (1), a torsion spring is provided between the telescopic end of the telescopic arc plate (54) and the sliding plate (53), and the telescopic end of the telescopic arc plate (54) is located inside the circular slotted frame (52).

5. A welding device for producing metal bellows according to claim 4, characterized in that: The anti-falling device (5) further comprises a heat-conducting component (55), a hot air gun (56), a spiral hose (57) and a semicircular guide plate (58); the heat-conducting component (55) is fixedly mounted on the outer wall of the sliding plate (53) at one side close to the center of the base (1); the hot air gun (56) is fixedly mounted inside the heat-conducting component (55) at one end away from the axis of the base (1); the spiral hose (57) is connected to and fixedly mounted between the heat-conducting component (55) and the heating component (48); and the bottom of the semicircular guide plate (58) is fixedly mounted on the top of the heat-conducting component (55).

6. A welding device for producing metal bellows according to claim 5, characterized in that: The anti-obstruction device (6) comprises a U-shaped plate (61), a rotating rod (62), a cam (63) and a U-shaped telescopic brush plate (64); the top of the U-shaped plate (61) is fixedly mounted on the bottom of the semicircular guide plate (58); the bottom of the rotating rod (62) is rotatably mounted on the top of the base (1); the cam (63) penetrates through the inside and is fixedly mounted on the outer wall of the bottom end of the rotating rod (62); and the bottom of the U-shaped telescopic brush plate (64) is slidably mounted on the top of the base (1) near one end of the rotating rod (62) via a spring.

7. A welding device for producing metal bellows according to claim 6, characterized in that: The outer wall at the top end of the rotating rod (62) passes through and is threadedly connected to the inside of the U-shaped plate (61); the bottom of the cam (63) contacts the top of the base (1); the arc surface of the outer wall of the fixed end of the U-shaped telescopic brush plate (64) is located on the movement trajectory of the cam (63); and the bottom of the end of the U-shaped telescopic brush plate (64) away from the rotating rod (62) contacts the bottom of the inner wall of the slide rail (2).

8. A welding device for producing metal bellows according to claim 7, characterized in that: The anti-obstruction device (6) further comprises a telescopic column (65), a plurality of arc panels (66), an activated carbon plate (67) and a resistance plate (68); the bottom of the telescopic column (65) is fixedly mounted on the top of the rotating rod (62); the outer wall of the telescopic end of the telescopic column (65) movably passes through the top of the U-shaped plate (61); the plurality of arc panels (66) are equidistantly and fixedly mounted on the outer wall of the telescopic end of the telescopic column (65); the outer wall of the activated carbon plate (67) is slidably mounted on the inner wall of the semicircular guide plate (58) via a spring; the resistance plate (68) is fixedly mounted on the inner wall of the activated carbon plate (67) on a side away from the telescopic column (65); and the arc surface of the resistance plate (68) is located on the movement trajectory of the arc panel (66).

9. A method for using a welding device for producing a metal bellows, using the welding device for producing a metal bellows according to claim 8, characterized in that: The following steps are involved: S1: First, the metal bellows is placed inside the limiting ring (42). At this time, the U-groove plate (41) limits and stabilizes the limiting ring (42). When the pipe moves horizontally from the outside to the center of the base (1) to the inside of the limiting ring (42), the outer wall of the pipe first contacts the outer wall of the round roller (47). The outer wall of the round roller (47) generates a rotational force through the force of the movement of the pipe and the friction force of its outer wall. S2: When the round roller (47) rotates inside the inclined plate (46), it is convenient for the pipe to enter the inside of the inclined plate (46) near the center of the limiting ring (42). At the same time, the resistance forces generated by pipes of different diameters on the inclined plate (46) are different. When the inclined plate (46) is subjected to the resistance force, its hinge shaft starts to rotate and drives the inclined plate (46) to flip in a direction away from the center of the limiting ring (42). At the same time, the inclined plate (46) is restricted by the torsion spring to force the round roller (47) to always fit the outer wall of the pipe. S3: At the same time, the heating component (48) on the outer wall of the U-groove plate (41) is pre-activated to emit heat, and the slide rail (2) subsequently drives the U-groove plates (41) on both sides to move toward the center of the base (1) through the linkage plate (21). The U-groove plates (41) drive the heating component (48) to move synchronously to expand the heating range. When the welding parts of the pipes on both sides are butted inside the annular track (31), the annular track (31) drives the welding component (32) to make an annular movement inside itself, and performs an annular movement welding on the pipes; S4: After the pipe enters the limiting ring (42), it contacts the outer wall arc surface of the arc clamping plate (44). During the movement of the pipe, it will resist the arc clamping plate (44) and move away from the center of the limiting ring (42). The arc clamping plate (44) resists the telescopic end of the elastic telescopic rod (43) and shrinks synchronously. The spring built into the elastic telescopic rod (43) is set to make the concave surface of the arc clamping plate (44) always close to the outer wall of the pipe, that is, the rubber block (45) always fits the outer wall of the pipe, thereby increasing the friction between the arc clamping plate (44) and the pipe.

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