Titanium and titanium alloy welded pipe manufacturing equipment and corresponding manufacturing method

Abstract

The present invention provides a titanium and titanium alloy welded pipe manufacturing device, and the present invention also provides a titanium and titanium alloy welded pipe manufacturing method, which integrates metal strips into metal pipes through spiral welds, has good anti-flatness performance and is not easy to crack. A titanium and titanium alloy welded pipe manufacturing device, which includes a substrate feeding mechanism, a shaping mechanism, a groove making mechanism, a welding mechanism, and a traction mechanism, the traction mechanism includes two support frames, each support frame has a corresponding welding roller inserted in the upper positioning hole through a bearing, the two welding rollers are combined into a coaxial continuous roller in a working state, and the two welding rollers are arranged in a non-working state. The relative outer end of one of the welding rollers is connected to a rotation drive device, and the rotation drive device drives the coaxial continuous roller to rotate in a working state. The area of ​​the coaxial continuous roller located between the two support frames in the working state is used to manufacture the welded pipe and is the working section of the welding roller.

Description

Technical Field

[0001] The invention relates to the technical field of metal pipe manufacturing, in particular to a titanium and titanium alloy welded pipe manufacturing device. The invention also provides a titanium and titanium alloy welded pipe manufacturing method. Background Art

[0002] At present, the titanium alloy welded pipes in China are mainly straight seam welded pipes, which are produced by directly rolling titanium plates or titanium strips and then welding them. The straight seam welded pipe has a long process, which is mainly divided into: cutting, rolling, welding, shaping and other processes. When welding straight seam titanium and titanium alloy welded pipes, manual welding is mainly used, the welding quality is unstable, and bubbles and oxidation are easily generated. The weld is parallel to the central axis of the pipe, resulting in poor flattening resistance of the straight seam welded pipe. And the weld is the weak point of the entire pipe. Once a crack source occurs, it will cause the entire pipeline to crack and fail quickly. For this reason, it is urgent to develop a welded pipe that can improve the anti-flattening performance of the pipeline and is not easy to crack. Summary of the invention

[0003] In view of the above problems, the present invention provides a titanium and titanium alloy welded pipe manufacturing device, which integrates metal strips into metal pipes through spiral welds, has good anti-flattening performance and is not prone to cracks.

[0004] A titanium and titanium alloy welded pipe manufacturing equipment, characterized in that it comprises:

[0005] A substrate feeding mechanism;

[0006] Plastic surgery institutions;

[0007] Beveling mechanism;

[0008] Welding mechanism;

[0009] and a traction mechanism, which includes two support frames, wherein a corresponding welding roller is inserted into the upper positioning hole of each support frame through a bearing, the two welding rollers are combined into a coaxial continuous roller in a working state, and the two welding rollers are arranged in a non-working state with their axes far apart, wherein the opposite outer end of one of the welding rollers is connected to a rotation driving device, and the rotation driving device drives the coaxial continuous roller to rotate in a working state, and the area of ​​the coaxial continuous roller in a working state located between the two support frames is used for manufacturing welded pipes and is a working section of the welding roller;

[0010] The substrate feeding mechanism is arranged outside one end of the welding roller working section in the length direction, and is used to convey the substrate to the outer ring surface of the welding roller working section at a set inclination angle along the axial longitudinal section;

[0011] The shaping mechanism comprises a forming seat with a spiral surface, which is used to shape the substrate delivered by the substrate feeding mechanism into a spiral shape and wrap it around the outer ring surface of the working section of the welding roller;

[0012] The groove making mechanism is arranged at the periphery of the axial section of the welding roller working section and is located at the rear position of the shaping mechanism. The groove making mechanism includes a tool, which is located at the periphery of the outer circumference of the welding roller working section. The tool is used to form a concave V-shaped groove in the joint seam area of ​​two tightly attached spiral belts.

[0013] The welding mechanism is arranged at the periphery of the axial section of the welding roller working section and is located at the rear position of the groove making mechanism. The welding mechanism includes a welding gun, which is located at the periphery of the outer circumference of the welding roller working section. The welding gun fills the concave V-shaped groove with solder to form a weld.

[0014] The rotation of the coaxial continuous roller drives the metal strip to spirally wrap around the outer circumference of the coaxial continuous roller from front to back until the length of the metal strip reaches a preset size. At this time, the joints between the spiral metal strips are formed into concave V-shaped grooves through the groove making mechanism, and the welding gun fills the concave V-shaped grooves with solder to form a weld to form a metal tube. After the metal tube is formed, the two welding rollers are set away from each other in the axial direction when not working, so as to take out the metal tube, and then carry out subsequent continuous operations.

[0015] It is further characterized by:

[0016] It also includes a finishing mechanism, which is arranged at the periphery of the axial section of the welding roller working section and located at the rear of the welding mechanism, and is used to finish and grind the outer surface of the metal pipe so that there is no exposed weld on the appearance;

[0017] The finishing mechanism is specifically composed of three groups of mixed grinding wheels, which are evenly distributed at 120 degrees around the outer circumference of the corresponding axial area of ​​the welding roller working section to ensure stable and reliable welding seam finishing and grinding;

[0018] Each group of mixed grinding wheels is equipped with a turning wheel, a rough grinding wheel, a shaping wheel and a fine grinding wheel from front to back. The diameter of the three shaping wheels is A, and the theoretical diameter of the welding pipe is D. The central axes of all shaping wheels are on a circle with a diameter of D+A, with the central axis of the welding pipe as the center. They are responsible for shaping the welding pipe after welding. The turning wheel, rough grinding wheel and fine grinding wheel of each group of mixed grinding wheels are coaxial with the shaping wheel of their respective groups;

[0019] The substrate feeding mechanism includes guide plates on both sides, an upper shaping roller, a lower shaping roller, and milling cutters on both sides. The substrate enters between the guide plates on both sides, and after being leveled by the shaping roller, the substrate is trimmed by the side milling cutter on both sides, so as to have precise width dimensions and excellent surface quality.

[0020] The traction mechanism also includes a base, a guide rail is provided on the base, and the guide rail is arranged parallel to the axial direction of the welding roller. One of the two support frames is a fixed support frame and the other is a movable support frame. The fixed support frame is arranged corresponding to the front end of the working section of the welding roller. The fixed support frame is fixedly arranged on the upper surface of the base, and the bottom of the movable support frame is supported on the guide rail through a slider. The movable support frame is arranged to move along the straight line direction of the guide rail.

[0021] The forming seat is provided with a through hole, the welding roller is arranged through the through hole, the inner ring of the through hole is provided with a spiral guide surface, the spiral guide surface includes an inlet and an outlet, the inlet position of the spiral guide surface is provided with a guide roller, the outer circumference of the spiral guide surface and the corresponding position of the outlet are respectively provided with shaping rollers, the guide rollers and shaping rollers are respectively fixed to the corresponding end faces of the forming seat through connecting shafts, the guide rollers allow the material strip to accurately enter the spiral guide surface, and the shaping rollers ensure that the spiral strip is spirally wrapped around the outer circumference of the welding roller working section and is arranged close to the outer circumference of the welding roller working section;

[0022] The bottom of the forming seat is supported on the guide rail through a slider, and the forming seat is also fixedly connected to the corresponding end surface of the fixed support frame through an axial spring. The spiral guide surface of the forming seat and the welding roller are in sliding cooperation. The axial spring drives the spiral belt in the spiral guide surface to be close to the spiral belt that has been formed at the rear end. Under the action of the axial spring, the forming seat moves backward to ensure that the newly entered raw material is close to the edge of the spiral belt that has been formed at the rear.

[0023] The groove making mechanism also includes an air gun, which is located at the rear of the tool and blows the dust generated by cutting away from the concave V-shaped groove;

[0024] The cutter is a circular cutter, and a plurality of sharp teeth are arranged on the outer circumference of the cutter, and the sharp teeth are processed along the spiral joint to form an inwardly concave V-shaped groove;

[0025] The inner concave depth of the V-shaped groove does not exceed the thickness of the material strip, ensuring that the solder of the subsequent welding operation will not penetrate the outer surface of the welding roller;

[0026] The welding mechanism also includes an argon gun and a protective cover. The welding gun is used to weld the joint seam of the spiral belt. The argon gun sprays gaseous argon and protects the product being welded with the help of the protective cover to avoid oxidation.

[0027] A method for manufacturing titanium and titanium alloy welded pipes, characterized in that: a titanium strip or a titanium alloy strip is used as a substrate, the substrate is guided and conveyed along a substrate feeding mechanism according to a set length, and then spirally coated on a welding roller working section of a coaxial continuous roller through a spiral guide hole of a shaping mechanism, the coaxial continuous roller rotates under the rotation of a rotating drive device, so that the strip-shaped substrate is coated from front to back to form a spiral strip, two adjacent spiral strips are closely attached to each other in the axial direction of an axial spring to form a splicing seam, the outer surface of the splicing seam is processed by a groove making mechanism to form an inward concave V-shaped groove, and then the welding gun of the welding mechanism fills the inward concave V-shaped groove with solder to form a welded pipe.

[0028] It is further characterized by:

[0029] The coaxial continuous roller is composed of a fixed welding roller and a movable welding roller. The fixed welding roller is supported by a corresponding through hole of a fixed support frame and is axially fixedly arranged. The movable welding roller is supported by a corresponding through hole of the movable support frame. The movable support frame is driven by a motor and a screw mechanism, so that the fixed welding roller and the movable welding roller are combined to form a coaxial continuous roller in a working state, or the axial directions of the fixed welding roller and the movable welding roller are separated in a non-working state. In a non-working state, the axial spacing distance between the fixed welding roller and the movable welding roller makes it easy to take out the welded pipe.

[0030] A linear spring is arranged between the forming seat and the fixed support frame corresponding to the shaping mechanism, and the linear spring drives the side edge of the spiral belt to be formed in the forming seat to be close to the corresponding side edge of the spiral belt formed behind, thereby forming a joint seam, which is convenient for the subsequent processing operation of the groove making mechanism;

[0031] The fixed welding roller and the movable welding roller are fixedly connected by tightening bolts after being assembled in place, so as to ensure subsequent synchronous rotation operation.

[0032] After adopting the structure of the present invention, titanium strips and titanium alloy strips of a certain width and thickness are guided and conveyed along the substrate feeding mechanism, and then spirally coated on the welding roller working section of the coaxial continuous roller through the spiral guide hole of the shaping mechanism. The coaxial continuous roller rotates under the rotation of the rotating drive device, so that the strip substrate is coated from front to back to form a spiral strip. The corresponding sides of two adjacent spiral strips are tightly attached to form a splicing seam. The outer surface of the splicing seam is processed by a groove making mechanism to form a concave V-shaped groove. Then the welding gun of the welding mechanism fills the concave V-shaped groove with solder to form a welded tube. Finally, the two welding rollers are separated to take out the formed welded tube. The metal strip is integrated into a metal tube through the spiral weld. The metal tube has good anti-flattening performance and is not easy to crack. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the three-dimensional structure of the device of the present invention;

[0034] Figure 2 A perspective view of a substrate feeding mechanism of the apparatus of the present invention;

[0035] Figure 3 A three-dimensional diagram of a shaping mechanism of the device of the present invention;

[0036] Figure 4 A three-dimensional diagram of a forming seat of the device of the present invention;

[0037] Figure 5 A three-dimensional schematic diagram of the beveling mechanism of the device of the present invention used for beveling;

[0038] Figure 6 A schematic diagram of a concave V-shaped groove suitable for the present invention;

[0039] Figure 7 A three-dimensional schematic diagram of the welding mechanism of the device of the present invention used for welding;

[0040] Figure 8 A perspective view of the traction mechanism of the device of the present invention;

[0041] Fig. 9 A perspective view of a hybrid grinding wheel of the apparatus of the present invention;

[0042] The names corresponding to the serial numbers in the figure are as follows:

[0043] Substrate feeding mechanism 10, guide plate 11, upper shaping roller 12, lower shaping roller 13, side milling cutter 14, shaping mechanism 20, forming seat 21, through hole 22, spiral guide surface 23, inlet 24, outlet 25, guide roller 26, shaping roller 27, axial spring 28, groove making mechanism 30, tool 31, air gun 32, welding mechanism 40, welding gun 41, argon gun 42, protective cover 43, traction mechanism 50, fixed support Support frame 51, movable support frame 52, fixed welding roller 53, movable welding roller 54, gear ring 55, transmission gear 56, base 57, guide rail 58, alignment and splicing gap 59, coaxial continuous roller 60, welding roller working section 61, substrate 70, concave V-shaped groove 80, finishing mechanism 90, mixed grinding wheel 91, turning wheel 92, rough grinding wheel 93, shaping wheel 94, fine grinding wheel 95, motor 100, screw 101. DETAILED DESCRIPTION

[0044] A titanium and titanium alloy welded pipe manufacturing equipment, see Figure 1-Figure 9The invention relates to a substrate feeding mechanism 10, a shaping mechanism 20, a groove making mechanism 30, a welding mechanism 40, and a traction mechanism 50. The traction mechanism 50 comprises two support frames, namely a fixed support frame 51 and a movable support frame 52. A corresponding welding roller is inserted into the upper positioning hole of each support frame through a bearing. The fixed support frame 51 corresponds to a fixed welding roller 53, and the movable support frame 52 corresponds to a movable welding roller 54. The support frame corresponding to the welding roller can rotate but the axial position is fixed. The two welding rollers are combined into a coaxial continuous roller 60 in the working state. The two welding rollers are arranged far apart in the axial direction in the non-working state. The relative outer end of the roller 54 is connected with a rotation driving device, which drives the coaxial continuous roller 60 to rotate in the working state. The area of ​​the coaxial continuous roller 60 located between the two support frames in the working state is used to manufacture the welded pipe and is the welding roller working section 61; the rotation driving device includes a gear ring 55, a transmission gear 56 and a transmission motor (not shown in the figure), the transmission motor is fixedly installed at the corresponding position of the mobile support frame 52, the transmission motor drives the transmission gear 56 to rotate, the transmission gear 56 is meshed and connected with the gear ring 55, the gear ring 55 is fixedly sleeved on the outer end of the mobile welding roller 54, and the transmission motor drives the coaxial continuous roller 60 to rotate to form a spiral casing assembly operation;

[0045] The substrate feeding mechanism 10 is arranged outside one end of the welding roller working section 61 in the length direction, and is used to convey the substrate 70 to the outer ring surface of the welding roller working section 61 at a set inclination angle along the axial longitudinal section;

[0046] The shaping mechanism 20 includes a shaping seat 21 with a spiral surface, which is used to shape the substrate 70 delivered by the substrate feeding mechanism 10 into a spiral shape and wrap it around the outer ring surface of the welding roller working section 61;

[0047] The groove making mechanism 30 is arranged at the periphery of the axial section of the welding roller working section 61 and at the rear position of the shaping mechanism 20. The groove making mechanism 30 includes a tool 31. The tool 31 is located at the periphery of the outer circumference of the welding roller working section 61. The tool 31 processes the joint seam area of ​​the two tightly attached spiral belts to form an inward concave V-shaped groove 80.

[0048] The welding mechanism 40 is arranged at the periphery of the axial section of the welding roller working section 61 and at the rear position of the groove making mechanism 30. The welding mechanism 40 includes a welding gun 41. The welding gun 41 is located at the periphery of the outer circumference of the welding roller working section 61. The welding gun 41 fills the concave V-shaped groove 80 with solder to form a weld.

[0049] The rotation of the coaxial continuous roller 60 drives the metal belt to spirally wrap around the outer circumference of the coaxial continuous roller 60 from front to back until the length of the metal belt reaches a preset size. At this time, the joints between the spiral metal belts are respectively formed into a concave V-shaped groove 80 through the groove making mechanism 30, and the welding gun 41 fills the concave V-shaped groove 80 with solder to form a weld to form a metal tube; after the metal tube is formed, the two welding rollers are set away from each other in the axial direction when not working, so as to take out the metal tube, and then carry out subsequent continuous operations.

[0050] In a specific embodiment, it further includes a finishing mechanism 90, which is disposed at the periphery of the axial section of the welding roller working section 61 and located at the rear of the welding mechanism 40. The finishing mechanism 90 is used to finish and grind the outer surface of the metal pipe so that there is no exposed weld on the appearance.

[0051] The finishing mechanism 90 is specifically composed of three groups of mixed grinding wheels 91, and the three groups of mixed grinding wheels 91 are evenly distributed at 120 degrees around the outer circumference of the corresponding axial area of ​​the welding roller working section 61, ensuring stable and reliable finishing and grinding of the weld;

[0052] Each group of mixed grinding wheels 91 is provided with a turning wheel 92, a rough grinding wheel 93, a shaping wheel 94 and a fine grinding wheel 95 from front to back. The diameter of the three shaping wheels 94 is A, and the theoretical diameter of the welding pipe is D. The central axes of all shaping wheels 94 are on a circle with a diameter of D+A, with the central axis of the welding pipe as the center. The shaping wheel 94 shapes the welding pipe after welding. The turning wheel 92, the rough grinding wheel 93 and the fine grinding wheel 95 of each group of mixed grinding wheels 91 are coaxial with the shaping wheel 94 of their respective groups.

[0053] The diameter of the turning wheel 92 is A-0.5, the diameter of the rough grinding wheel 93 is A-0.2, and the diameter of the fine grinding wheel 95 is A. After the welding pipe is turned, rough and finely ground, and shaped, there is no exposed weld on the appearance;

[0054] The substrate feeding mechanism 10 includes guide plates 11 on both sides, an upper shaping roller 12, a lower shaping roller 13, and milling cutters 14 on both sides. The substrate enters between the guide plates 11 on both sides, and after being leveled by the upper shaping roller 12 and the lower shaping roller 13, the two sides of the substrate are trimmed by the side milling cutter 14, so as to have a precise width dimension and excellent surface quality.

[0055] The traction mechanism 50 further includes a base 57, on which a guide rail 58 is provided, and the guide rail 58 is arranged parallel to the axial direction of the welding roller. The fixed support frame 51 is arranged corresponding to the front end of the welding roller working section 61, and the fixed support frame 51 is fixedly arranged on the upper surface of the base 57. The bottom of the movable support frame 52 is supported on the guide rail 58 through a slider, and the movable support frame 52 is arranged to move along the straight line direction of the guide rail 58.

[0056] A through hole 22 is provided in the forming seat 21, and a fixed welding roller 53 is arranged through the through hole 22. A spiral guide surface 23 is provided on the inner ring of the through hole 22. The spiral guide surface 23 includes an inlet 24 and an outlet 25. A guide roller 26 is provided at the inlet 24 of the spiral guide surface 23. Shaping rollers 27 are provided at the outer circumference of the spiral guide surface 23 and at the corresponding positions of the outlet. The guide rollers 26 and the shaping rollers 27 are respectively fixed to the corresponding end faces of the forming seat 21 through connecting shafts. The guide rollers 26 allow the material belt to accurately enter the spiral guide surface 23. The shaping rollers 27 ensure that the spiral belt is spirally wrapped around the outer circumference of the welding roller working section 61 and is arranged close to the outer circumference of the welding roller working section 61. The metal belt generates friction when it is close to the coaxial continuous roller 60, and the rotation of the coaxial continuous roller 60 drives the metal belt to rotate.

[0057] The bottom of the forming seat 21 is supported on the guide rail 58 through a slider. The forming seat 21 is also fixedly connected to the corresponding end surface of the fixed support frame 51 through an axial spring 28. The spiral guide surface of the forming seat 21 and the welding roller are in sliding cooperation. The axial spring 28 drives the spiral belt in the spiral guide surface 23 to be close to the spiral belt that has been formed at the rear end. Under the action of the axial spring, the forming seat 21 moves backward to ensure that the newly entered raw material is close to the edge of the spiral belt that has been formed at the rear. In specific implementation, the axial spring 28 is six rectangular springs arranged in a ring to ensure that there is sufficient axial pressure on the forming seat. The friction force generated by the surface of the metal belt and the welding roller serves as a resistance to the spring force, ensuring that the spring force will not loosen the metal belt and can only play a pressing operation to ensure close contact.

[0058] The groove making mechanism 30 further includes an air gun 32, which is located at the rear of the tool 31, and the air gun 32 blows the dust generated by cutting away from the concave V-shaped groove 80;

[0059] The cutter 31 is a circular cutter, and a plurality of sharp teeth are provided on the outer circumference of the cutter 31 , and the sharp teeth are processed along the spiral joint to form an inwardly concave V-shaped groove 80;

[0060] The concave depth of the concave V-shaped groove 80 does not exceed the thickness of the material strip, ensuring that the solder of the subsequent welding operation will not penetrate the outer surface of the welding roller;

[0061] The welding mechanism 40 also includes an argon gun 42 and a protective cover 43. The welding gun 41 is used to weld the joint seam of the spiral belt. The argon gun 42 sprays gaseous argon and, with the help of the protective cover 43, protects the product being welded to avoid oxidation.

[0062] In specific implementation, the mobile support frame 52 is driven by the motor 100 and the screw rod 101 to perform axial movement operation to ensure stable and reliable transmission;

[0063] After the fixed welding roller 53 and the movable welding roller 54 are assembled into place in the alignment assembly notch 59, they are fixedly connected by fastening bolts (obscured in the figure and located inside the cavity) to ensure subsequent synchronous rotation operation.

[0064] A method for manufacturing titanium and titanium alloy welded pipes, which adopts a titanium and titanium alloy welded pipe manufacturing equipment, and then pre-assembles a fixed welding roller and a movable welding roller to form a coaxial continuous roller. A titanium strip or a titanium alloy strip is used as a substrate, and the substrate is guided and conveyed along a substrate feeding mechanism according to a set length, and then spirally coated on the welding roller working section of the coaxial continuous roller through a spiral guide hole of a shaping mechanism. The coaxial continuous roller rotates under the rotation of a rotating drive device, so that the strip-shaped substrate is coated from front to back to form a spiral strip. Two adjacent spiral strips form a splicing seam in the axially driven close-fitting part of an axial spring, and the outer surface of the splicing seam is processed by a groove making mechanism to form an inward concave V-shaped groove, and then the welding gun of the welding mechanism fills the inward concave V-shaped groove with solder to form a welded pipe.

[0065] In a specific implementation, the substrate is a titanium or titanium alloy strip coil with a width of 60 to 80 mm and a thickness of 0.5 mm to 8 mm;

[0066] The coaxial continuous roller is composed of a fixed welding roller and a movable welding roller. The fixed welding roller is supported by a corresponding through hole of a fixed support frame and is axially fixedly arranged. The movable welding roller is supported by a corresponding through hole of the movable support frame. The movable support frame is driven by a motor and a screw mechanism, so that the fixed welding roller and the movable welding roller are combined to form a coaxial continuous roller in a working state, or the axial directions of the fixed welding roller and the movable welding roller are separated in a non-working state. In a non-working state, the axial spacing distance between the fixed welding roller and the movable welding roller makes it easy to take out the welded pipe.

[0067] A linear spring is arranged between the forming seat and the fixed support frame corresponding to the shaping mechanism, and the linear spring drives the side edge of the spiral belt to be formed in the forming seat to be close to the corresponding side edge of the spiral belt formed behind, thereby forming a joint seam, which is convenient for the subsequent processing operation of the groove making mechanism;

[0068] After being assembled into place, the fixed welding roller and the movable welding roller are fixedly connected by tightening bolts to ensure subsequent synchronous rotation operation.

[0069] Its working principle is as follows: it guides and conveys titanium strips and titanium alloy strips of a certain width and thickness along the substrate feeding mechanism, and then spirally wraps them on the welding roller working section of the coaxial continuous roller through the spiral guide hole of the shaping mechanism. The coaxial continuous roller rotates under the rotation of the rotating drive device, so that the strip substrate is wrapped from front to back to form a spiral strip. The corresponding sides of two adjacent spiral strips are tightly attached to form a splicing seam. The outer surface of the splicing seam is processed by a groove making mechanism to form an inward concave V-shaped groove. Then the welding gun of the welding mechanism fills the inward concave V-shaped groove with solder to form a welded tube. Finally, the two welding rollers are separated to take out the formed welded tube. The metal strip is integrated into a metal tube through a spiral weld. It has good anti-flattening performance and is not easy to crack.

[0070] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0071] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A titanium and titanium alloy welded pipe manufacturing equipment, characterized in that: It includes: A substrate feeding mechanism; Plastic surgery institutions; Beveling mechanism; Welding mechanism; and a traction mechanism, which includes two support frames, wherein a corresponding welding roller is inserted into the upper positioning hole of each support frame through a bearing, the two welding rollers are combined into a coaxial continuous roller in a working state, and the two welding rollers are arranged in a non-working state with their axes far apart, wherein the opposite outer end of one of the welding rollers is connected to a rotation driving device, and the rotation driving device drives the coaxial continuous roller to rotate in a working state, and the area of ​​the coaxial continuous roller in a working state located between the two support frames is used for manufacturing welded pipes and is a working section of the welding roller; The substrate feeding mechanism is arranged outside one end of the welding roller working section in the length direction, and is used to convey the substrate to the outer ring surface of the welding roller working section at a set inclination angle along the axial longitudinal section; The shaping mechanism comprises a forming seat with a spiral surface, which is used to shape the substrate delivered by the substrate feeding mechanism into a spiral shape and wrap it around the outer ring surface of the working section of the welding roller; The groove making mechanism is arranged at the periphery of the axial section of the welding roller working section and is located at the rear position of the shaping mechanism. The groove making mechanism includes a tool, which is located at the periphery of the outer circumference of the welding roller working section. The tool is used to form a concave V-shaped groove in the joint seam area of ​​two tightly attached spiral belts. The welding mechanism is arranged at the periphery of the axial section of the welding roller working section and is located at the rear position of the groove making mechanism. The welding mechanism includes a welding gun, which is located at the periphery of the outer circumference of the welding roller working section. The welding gun fills the concave V-shaped groove with solder to form a weld. The coaxial continuous roller rotates to drive the metal strip to spirally wrap around the outer circumference of the coaxial continuous roller from front to back until the length of the metal strip reaches a preset size. At this time, the joints between the spiral metal strips are respectively formed into concave V-shaped grooves through the groove making mechanism, and the welding gun fills the concave V-shaped grooves with solder to form a weld and form a metal tube. After the metal tube is formed, the two welding rollers are set apart in the axial direction in the non-working state, so as to take out the metal tube, and then carry out subsequent continuous operations; The traction mechanism also includes a base, a guide rail is provided on the base, and the guide rail is arranged parallel to the axial direction of the welding roller. One of the two support frames is a fixed support frame and the other is a movable support frame. The fixed support frame is arranged corresponding to the front end of the working section of the welding roller. The fixed support frame is fixedly arranged on the upper surface of the base, and the bottom of the movable support frame is supported on the guide rail through a slider. The movable support frame is arranged to move along the straight line direction of the guide rail. The forming seat is provided with a through hole, the welding roller is arranged through the through hole, the inner ring of the through hole is provided with a spiral guide surface, the spiral guide surface includes an inlet and an outlet, the inlet position of the spiral guide surface is provided with a guide roller, the outer circumference of the spiral guide surface and the corresponding position of the outlet are respectively provided with shaping rollers, the guide rollers and shaping rollers are respectively fixed to the corresponding end faces of the forming seat through the connecting shaft, and the guide rollers enable the material strip to accurately enter the spiral guide surface; The bottom of the forming seat is supported on the guide rail through a slider, and the forming seat is also fixed to the corresponding end surface of the fixed support frame through an axial spring. The spiral guide surface of the forming seat and the welding roller are in sliding fit, and the axial spring drives the spiral belt in the spiral guide surface to be close to the spiral belt that has been formed at the rear end. Under the action of the axial spring, the forming seat moves backward to ensure that the newly entered raw material is close to the edge of the spiral belt that has been formed at the rear.

2. A titanium and titanium alloy welded pipe manufacturing equipment as claimed in claim 1, characterized in that: It also includes a finishing mechanism, which is arranged at the periphery of the axial section of the welding roller working section and located at the rear of the welding mechanism, and is used for finishing and grinding the outer surface of the metal pipe.

3. A titanium and titanium alloy welded pipe manufacturing equipment as claimed in claim 2, characterized in that: The finishing mechanism is specifically composed of three groups of mixed grinding wheels, and the three groups of mixed grinding wheels are evenly distributed at 120 degrees around the outer circumference of the corresponding axial area of ​​the welding roller working section.

4. A titanium and titanium alloy welded pipe manufacturing equipment as claimed in claim 3, characterized in that: Each group of mixed grinding wheels is equipped with a turning wheel, a rough grinding wheel, a shaping wheel and a fine grinding wheel from front to back. The diameter of the three shaping wheels is A, and the theoretical diameter of the welding pipe is D. The central axes of all shaping wheels are on a circle with a diameter of D+A and the central axis of the welding pipe as the center. They are responsible for shaping the welding pipe after welding. The turning wheel, rough grinding wheel and fine grinding wheel of each group of mixed grinding wheels are coaxial with the shaping wheel of their own group.

5. The titanium and titanium alloy welded pipe manufacturing equipment according to claim 1, characterized in that: The substrate feeding mechanism comprises guide plates on two sides, an upper shaping roller, a lower shaping roller, and milling cutters on two sides.

6. A method for manufacturing titanium and titanium alloy welded pipes, which uses a titanium and titanium alloy welded pipe manufacturing equipment as claimed in any one of claims 1 to 5, characterized in that: A titanium strip or a titanium alloy strip is used as a substrate, and the substrate is guided and conveyed along a substrate feeding mechanism according to a set length, and then spirally coated on a welding roller working section of a coaxial continuous roller through a spiral guide hole of a shaping mechanism. The coaxial continuous roller rotates under the rotation of a rotating drive device, so that the strip substrate is coated from front to back to form a spiral strip, and two adjacent spiral strips form a splicing seam in close contact with the axial drive of an axial spring, and the outer surface of the splicing seam is processed by a groove making mechanism to form an inward concave V-shaped groove, and then the welding gun of the welding mechanism fills the inward concave V-shaped groove with solder to form a welded pipe.

7. A method for manufacturing a titanium and titanium alloy welded pipe as claimed in claim 6, characterized in that: The coaxial continuous roller consists of a fixed welding roller and a movable welding roller. The fixed welding roller is supported by the corresponding through hole of the fixed support frame and is axially fixed. The movable welding roller is supported by the corresponding through hole of the movable support frame. The movable support frame is driven by the mechanism of the motor and the screw rod, so that the fixed welding roller and the movable welding roller are assembled to form a coaxial continuous roller in the working state, or the axial directions of the fixed welding roller and the movable welding roller are separated in the non-working state. In the non-working state, the axial spacing distance between the fixed welding roller and the movable welding roller makes it easy to take out the welded pipe.

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