Metal pipe welding forming processing equipment

Abstract

This application discloses a metal pipe welding and forming processing equipment, belonging to the field of metal pipe forming technology. The equipment includes a forming unit where a metal sheet, after being formed, is stopped by a limiting unit in front of it. A multi-station extrusion unit is located in front of the limiting unit for welding the top of the conveyed metal pipe. A main equipment unit is located on one side of the multi-station extrusion unit, which includes a second mounting base plate, a side plate, two sets of extrusion components, and a steering component. The beneficial effects of this application are: the extrusion unit has two sets of extrusion components. When one extrusion component reaches a preset usage time (e.g., 8 hours) or a wear threshold, the system automatically rotates and switches to the other extrusion component. The first extrusion component retracts to the "maintenance station," and the second extrusion component enters the "working station," completely solving the problem of sudden downtime caused by wear or damage to a single extrusion component.

Description

Technical Field

[0001] This application relates to the field of metal pipe forming technology, and in particular to a metal pipe welding forming processing equipment. Background Technology

[0002] In the metal processing industry, metal pipe welding and forming equipment continuously bends strip (coil) through multiple forming rollers, quickly and accurately rolling the straight metal strip into a circle. Then, a welding device continuously welds the open edge of the formed pipe blank to form a closed tubular structure. The welding equipment on the market generally uses high-frequency welding. The specific welding principle is that the edge of the pipe blank is instantly heated to the melting point or plastic state under the action of high-frequency current. Then, under the huge pressure of the extrusion roller, the two molten edges are squeezed together. The molten metal diffuses and combines with each other, while the oxide layer on the surface is extruded to form a dense weld, completing the pipe making process. It is widely used in industries such as construction, machinery, automobiles, and furniture. In current high-frequency welding, when extrusion is performed using extrusion rollers, only one set of extrusion rollers is typically used. These extrusion rollers are critical components in the high-frequency welding process; if they fail, the production line must stop immediately. Since extrusion roller failure is not instantaneous but gradual, a section of substandard steel pipe may already be produced before the rollers fail. Even replacing the extrusion rollers and readjusting the height requires time and experience. Furthermore, extrusion roller failures usually necessitate emergency shutdowns. During emergency shutdowns, due to the high temperature in the high-frequency welding area, a certain amount of time must be waited to ensure safe handling and prevent burns to personnel. Throughout this process, extrusion roller failures can result in significant downtime losses for the factory and disrupt production schedules. Summary of the Invention

[0003] One of the objectives of this application is to solve the problem that if the extrusion rollers of current metal pipe welding and forming equipment are damaged during the metal pipe forming and welding process, it will cause huge downtime and damage to the factory, and to provide a metal pipe welding and forming equipment.

[0004] To achieve the above objectives, the technical solution adopted in this application is as follows: a metal pipe welding and forming processing equipment, including a forming unit, wherein after the metal sheet is formed by the forming unit, it reaches a limiting unit in front of it for limiting, and a multi-station extrusion unit is provided in front of the limiting unit for welding the top of the conveyed metal pipe. A main body unit is provided on one side of the multi-station extrusion unit. The multi-station extrusion unit includes a second mounting base plate, side plates, two sets of extrusion components and a steering component. Two sets of side plates are symmetrically arranged on the top of the second mounting base plate. Each set of side plates is provided with an extrusion component connected by the steering component. The extrusion component is configured as a telescopic structure. A grinding mechanism is also symmetrically arranged above the second mounting base plate for grinding the extrusion components.

[0005] Preferably, the forming unit, the limiting unit, the multi-station extrusion unit, and the main equipment unit are all installed in a fixed working area, which is configured as a concave structure for collecting wastewater and waste generated during the processing.

[0006] Preferably, the limiting unit includes a first mounting base plate, a fixed housing, lead screws, a movable nut, and a limiting roller. The first mounting base plate is installed in the installation area, and a fixed housing is provided at its top. Two sets of lead screws are symmetrically arranged inside the fixed housing. A movable nut with a threaded connection is provided outside the lead screws, and a limiting roller is provided at the top of the movable nut.

[0007] Preferably, the extrusion assembly includes a connecting frame, a limiting groove, a lead screw, a rotary motor, a limiting frame, and an extrusion roller. The connecting frame has an "L" shaped cross-section. Limiting grooves are evenly spaced on the bottom horizontal plate of the connecting frame. A lead screw is installed inside the middle limiting groove. The top of the lead screw is driven by the motor. A sliding rod is installed outside the lead screw. The sliding rod slides inside the limiting groove, and its top is connected to the limiting frame.

[0008] Preferably, a rotary motor is provided in the middle of the limiting frame, and a squeezing roller is provided at the top of the rotary motor.

[0009] Preferably, the main unit of the equipment includes a fixed rectangular frame, a horizontal frame, a welding host, a water storage device, a water pump, and a water pipe. The horizontal frame is integrally installed at the top of the fixed rectangular frame, and the two are arranged in an "L" shape. The welding host is arranged at the bottom of the fixed rectangular frame, and an induction coil is arranged at the top of the welding host. The induction coil is sleeved on the outside of the metal pipe.

[0010] Preferably, the top of the welding host is provided with a water storage device, and a water pump and a water pipe are provided on the outside of the water storage device, and the top of the water pipe is connected to the nozzle.

[0011] Preferably, the grinding mechanism includes two sets of support structures, and the support structure includes two fixed vertical rods, a mounting frame, a reset component and a grinding roller. The top of the two fixed vertical rods is provided with a mounting frame, and a grinding roller connected by the reset component is provided inside the mounting frame. The two sides of the intermediate shaft of the grinding roller are provided with threaded structures.

[0012] Preferably, the grinding mechanism further includes two sets of protective plates, which are connected to the mounting frames offset from the central axis position in the two sets of support structures, for use in grinding protection work.

[0013] Compared with the prior art, the beneficial effects of this application are as follows: (1) The multi-station extrusion unit is equipped with two sets of extrusion components. When one extrusion component reaches the preset usage time (e.g., 8 hours) or wear threshold, the system automatically rotates and switches to the other extrusion component. The first extrusion component retreats to the "maintenance station" and the second extrusion component enters the "working station". This completely solves the problem of sudden shutdown caused by wear and damage of one extrusion component, ensuring that the entire production line can work continuously. At the same time, the first extrusion component that has retreated can immediately contact the grinding mechanism to remove surface oxide scale, minor scratches and weld bead residue, restore the smoothness of the roller surface, and effectively prevent minor defects from expanding into serious damage in subsequent use. Through the periodic replacement of the two extrusion components, it can be ensured that the extrusion component of the working station can always be in the "best working state". The subsequent replacement of the extrusion component is not to directly replace the working station, but to replace the replaced extrusion component, which has sufficient cooling time and will not affect the normal tube making work.

[0014] (2) Both extrusion components are positioned by means of a steering component and a lead screw nut. By initially calibrating the two sets of rotating mechanisms to the same position, when one set of extrusion components retracts or is damaged, the other set of rollers only needs to perform the steering of the steering component and the transmission of the lead screw nut. There is no need for tedious fine-tuning and positioning, and the initial working position can be reached. This greatly shortens the replacement time and minimizes the replacement time, ensuring that the entire production line can work continuously and efficiently. (3) A grinding mechanism is provided. After the extrusion rollers in the extrusion assembly are used for a period of time, the surface will be covered with welding slag, oxide scale, or slight scratches and indentations. The grinding mechanism can restore the smoothness of the extrusion roller surface, so that the extrusion rollers are in "standard condition" every time they are put into use, ensuring that the weld quality does not fluctuate due to the difference in roller surface condition. At the same time, the grinding is carried out at the maintenance station, which does not affect the normal production of the production line at all. It realizes the parallel operation of "production" and "maintenance", and the efficiency is much higher than that of shutdown maintenance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of the present invention.

[0016] Figure 2 This is a top view of the structure of the present invention.

[0017] Figure 3 This is a schematic diagram of the main structure of the molding unit of the present invention.

[0018] Figure 4 This is a schematic diagram of the main structure of the limiting unit and the multi-station extrusion unit of the present invention.

[0019] Figure 5 This is a schematic diagram of the back structure of the limiting unit and the multi-station extrusion unit of the present invention.

[0020] Figure 6 This is a side view of the limiting unit and multi-station extrusion unit of the present invention.

[0021] Figure 7 This is a partially enlarged structural diagram of the grinding mechanism of the present invention.

[0022] Figure 8 This is an enlarged schematic diagram of the connection between the extrusion assembly and the steering assembly of the present invention.

[0023] Figure 9 This is an enlarged structural schematic diagram of the steering component of the present invention.

[0024] In the diagram: 1. Forming unit; 2. Limiting unit; 21. First mounting base plate; 22. Fixed housing; 23. Lead screw; 24. Moving nut; 25. Limiting roller; 3. Multi-station extrusion unit; 31. Second mounting base plate; 32. Side plate; 33. Extrusion assembly; 331. Connecting frame; 332. Limiting groove; 333. Lead screw; 334. Rotary motor; 335. Limiting frame; 336. Extrusion roller; 34. Steering assembly; 341. Drive equipment; 342. Rotating rod; 4. Main equipment unit; 41. Fixed rectangular frame; 42. Horizontal frame; 43. Welding host; 44. Water storage device; 45. Water pump; 46. Water pipe; 5. Grinding mechanism; 51. Fixed vertical rod; 52. Mounting frame; 53. Reset assembly; 54. Grinding roller; 55. Protective plate; 6. Nozzle. Detailed Implementation

[0025] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0026] In the description of this application, it should be noted that the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., which indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of this application.

[0027] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0028] One preferred embodiment of this application, such as Figures 1 to 9 As shown, a metal pipe welding and forming processing equipment includes a forming unit 1. After the metal sheet is formed by the forming unit 1, it reaches the limiting unit 2 in front of it for limiting. A multi-station extrusion unit 3 is arranged in front of the limiting unit 2 for welding the top of the conveyed metal pipe. A main equipment unit 4 is arranged on one side of the multi-station extrusion unit 3. The multi-station extrusion unit 3 includes a second mounting base plate 31, side plates 32, two sets of extrusion components 33 and a steering component 34. Two sets of side plates 32 are symmetrically arranged on the top of the second mounting base plate 31. Each set of side plates 32 is provided with an extrusion component 33 connected by the steering component 34. The extrusion component 33 is set as a telescopic structure. A grinding mechanism 5 is also symmetrically arranged above the second mounting base plate 31 for grinding the extrusion component 33.

[0029] This application provides a metal tube welding and forming processing equipment with two sets of extrusion components 33. Specifically, during use, the strip coil is continuously bent under the action of multiple forming rollers in the forming unit 1, causing the straight metal strip to be quickly and accurately coiled into a circle before reaching the position of the limiting unit 2 for limiting. During the limiting process, the rounded metal strip continues to be transported. The high-frequency current output by the high-frequency generator in the main unit 4 of the equipment is connected to the induction coil through a flexible connection or conductive busbar. The high-frequency current in the coil excites a high-frequency alternating magnetic field, the magnetic field strength of which is proportional to the current. Combined with the setting of the impedance device, it forces... The current can only flow along the edge of the tube blank, i.e. the weld path, to prevent the current from "short-circuiting" to other parts of the tube wall, thereby greatly enhancing the proximity effect until the edge of the tube melts. The melted tube reaches the bottom of the extrusion component 33 at the working position for extrusion, pressing the molten edges together to complete the forming process. After that, it reaches the subsequent pre-treatment station to remove excess weld beads and oxide scale from the outside of the weld. Then, after water cooling, the tube moves forward continuously, and the flying saw moves synchronously with it to cut the infinitely long tube into finished tubes of standard length. The cut finished tubes are collected and packaged through the discharge table to complete the production. In this application, the forming unit 1 includes 6-12 sets of forming frames. The forming roller angle and curvature of each set of frames gradually change, bending the strip from a "flat plate" into a "U" shape and finally closing it into an "O" shape to complete the forming work. In addition, during the high-frequency welding process, the entire equipment also needs to be equipped with corresponding fume extraction and filtration equipment to extract and treat the fumes generated during the welding process. Furthermore, when the working cycle of the extrusion component 33 at the working position reaches a certain time or the wear threshold reaches a certain level, the entire equipment can be stopped. Then, the extrusion component 33 at the working position is controlled to retract and then rotated by the steering component 34 to reach the position of the corresponding grinding mechanism 5 for grinding. At the same time, the extrusion component 33 at the maintenance position is controlled to rotate and extend. After reaching the working position, the equipment can be started again to resume work. The entire shutdown process is completed within three minutes, with a high degree of automation. No manual positioning is required, and efficient continuous operation can be carried out.

[0030] As a further preferred embodiment, according to Figure 3 As shown, the limiting unit 2 includes a first mounting base plate 21, a fixed housing 22, a lead screw 23, a movable nut 24, and a limiting roller 25. The first mounting base plate 21 is installed in the installation area, and a fixed housing 22 is provided at its top. Two sets of lead screws 23 are symmetrically arranged inside the fixed housing 22. A movable nut 24 with a threaded connection is provided outside the lead screw 23, and a limiting roller 25 is provided at the top of the movable nut 24.

[0031] When the limiting unit 2 is used for limiting, the top of the lead screw 23 can be rotated by using external tools such as a wrench. When the lead screw 23 rotates, it will be threadedly connected to the movable nut 24, which will cause the movable nut 24 to drive the limiting roller 25 at its top to move. By controlling the distance between the two limiting rollers 25, the purpose of adjustment can be achieved according to the different diameters of the metal tube.

[0032] When the extrusion assembly 33 is performing rotation and positioning, according to Figure 7 , Figure 8 and Figure 9 As shown, the extrusion assembly 33 includes a connecting frame 331, a limiting groove 332, a lead screw 333, a rotary motor 334, a limiting frame 335, and an extrusion roller 336. The connecting frame 331 has an "L" shaped cross-section. The limiting grooves 332 are evenly spaced on the bottom horizontal plate of the connecting frame 331. The lead screw 333 is installed inside the middle limiting groove 332. The top of the lead screw 333 is driven by the motor. A sliding rod is installed outside the lead screw 333. The sliding rod slides inside the limiting groove 332 and its top is connected to the limiting frame 335.

[0033] A rotary motor 334 is provided in the middle of the limiting frame 335, and a pressing roller 336 is provided at the top of the rotary motor 334.

[0034] First, when the pipe reaches the bottom of the extrusion assembly 33 at the working position, the rotary motor 334 continuously drives the extrusion roller 336 to rotate. During the rotation, the edge of the molten pipe is extruded, and the welding and sewing work is completed. When replacement is needed, the motor at the top of the lead screw 333 needs to be started to drive the lead screw 333 to rotate. During rotation, due to the presence of balls between the lead screw 333 and the spiral groove inside the sliding rod, the balls roll in the groove, pushing the sliding rod to move linearly along the axis of the lead screw 333, and then retracting towards the position of the connecting frame 331. After reaching the final position, the drive device 341 on the steering assembly 34 can be started, so that it drives the entire extrusion assembly 33 at its top to rotate through the rotating rod 342, so that it reaches the maintenance position. At the same time, the extrusion assembly 33 at another maintenance position will be rotated and moved by the steering assembly 34 at its top, cooperating with the work of the ball screw 333, so that it reaches the working position and can immediately perform extrusion work. During the welding process, coolant continuously drips down, and there is no grinding or cutting process. Therefore, even if the lead screw 333 is exposed at this time, there will be no large particles of impurities on its surface that would affect its normal transmission operation.

[0035] As a further preferred embodiment, according to Figure 4 and Figure 5 As shown, the forming unit 1, the limiting unit 2, the multi-station extrusion unit 3 and the main equipment unit 4 are all installed in the fixed working area. The working area is set as a concave structure to collect wastewater and waste generated during the processing.

[0036] The main unit 4 of the equipment includes a fixed rectangular frame 41, a horizontal frame 42, a welding host 43, a water storage device 44, a water pump 45, and a water pipe 46. The horizontal frame 42 is integrally installed at the top of the fixed rectangular frame 41, and the two are arranged in an "L" shape. The welding host 43 is arranged at the bottom of the fixed rectangular frame 41. An induction coil is arranged at the top of the welding host 43, and the induction coil is sleeved on the outside of the metal pipe.

[0037] The welding host 43 is provided with a water storage device 44 at the top, and a water pump 45 is provided on the outside of the water storage device 44 and connected to a water pipe 46. The top of the water pipe 46 is connected to the nozzle 6.

[0038] During the high-frequency welding process, in order to ensure continuous cooling, the water pump 45 needs to be started so that it draws the coolant inside the water storage device 44 into the water pipe 46 and finally sprays it out at the nozzle 6 to complete the cooling work. The falling coolant will reach the fixed working area at the bottom of the forming unit 1, the limiting unit 2, the multi-station extrusion unit 3 and the equipment main body unit 4 for collection. After filtration, it will be discharged or recycled.

[0039] The horizontal bracket 42 is designed to facilitate the routing and securing of cables throughout the equipment, preventing cable clutter.

[0040] During the polishing process, according to Figure 6 and Figure 7 As shown, the grinding mechanism 5 includes two sets of support structures, and the support structure includes two fixed vertical rods 51, a mounting frame 52, a reset component 53 and a grinding roller 54. The top of the two fixed vertical rods 51 is provided with a mounting frame 52, and the grinding roller 54 connected by the reset component 53 is provided inside the mounting frame 52. The two sides of the intermediate shaft of the grinding roller 54 are provided with threaded structures.

[0041] The grinding mechanism 5 also includes two sets of protective plates 55, which are connected to the mounting frames 52 located off-center from the central axis in the two sets of support structures, for use in grinding protection work.

[0042] When the retracted grinding mechanism 5 is initially in the maintenance position, since the two sides of the shaft in the middle of the grinding roller 54 are not limited and tightened, the grinding roller 54 on the grinding mechanism 5 can move under the action of the reset component 53. After the squeeze roller 336 is in the corresponding position of the grinding roller 54, due to the presence of the reset component 53, the grinding roller 54 will always be in contact with the squeeze roller 336. Therefore, at this time, the external nut is removed to tighten and limit the position of the grinding roller 54. Then, when the squeeze roller 336 reaches the position of the grinding roller 54, it is only necessary to control the squeeze roller 336 to rotate. During the rotation, it continuously contacts the grinding roller 54 to complete the grinding work. The waste generated during the process can be blocked by the protective plate 55 to ensure that it does not reach the conveying pipe.

[0043] The reset component can be a spring reset structure, and the present invention makes no restrictions on this.

[0044] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A metal pipe fitting welding and forming processing equipment, characterized in that, The equipment includes a forming unit (1), after the metal sheet is formed by the forming unit (1), it reaches the limiting unit (2) in front of it for limiting. A multi-station extrusion unit (3) is provided in front of the limiting unit (2) for welding the top of the conveyed metal pipe. A main equipment unit (4) is provided on one side of the multi-station extrusion unit (3). The multi-station extrusion unit (3) includes a second mounting base plate (31), side plates (32), two sets of extrusion components (33) and a steering component (34). Two sets of side plates (32) are symmetrically arranged on the top of the second mounting base plate (31). Each set of side plates (32) is provided with an extrusion component (33) connected by the steering component (34). The extrusion component (33) is set as a telescopic structure. A grinding mechanism (5) is also symmetrically arranged above the second mounting base plate (31) for grinding the extrusion component (33).

2. The metal pipe fitting welding and forming processing equipment as described in claim 1, characterized in that: The forming unit (1), the limiting unit (2), the multi-station extrusion unit (3) and the main body unit (4) are all installed in a fixed working area. The working area is set as a concave structure for collecting wastewater and waste generated during the processing.

3. The metal pipe fitting welding and forming processing equipment as described in claim 2, characterized in that: The limiting unit (2) includes a first mounting base plate (21), a fixed housing (22), a lead screw (23), a movable nut (24), and a limiting roller (25). The first mounting base plate (21) is installed in the installation area, and a fixed housing (22) is provided at its top. Two sets of lead screws (23) are symmetrically arranged inside the fixed housing (22). A movable nut (24) with a threaded connection is provided outside the lead screw (23). A limiting roller (25) is provided at the top of the movable nut (24).

4. The metal pipe fitting welding and forming processing equipment as described in claim 3, characterized in that: The extrusion assembly (33) includes a connecting frame (331), a limiting groove (332), a lead screw (333), a rotary motor (334), a limiting frame (335), and an extrusion roller (336). The connecting frame (331) has an "L" shaped cross-section. The limiting grooves (332) are evenly spaced on the bottom horizontal plate of the connecting frame (331). The lead screw (333) is installed inside the limiting groove (332) in the middle. The top of the lead screw (333) is driven by the motor. A sliding rod is installed outside the lead screw (333). The sliding rod slides inside the limiting groove (332) and its top is connected to the limiting frame (335).

5. The metal pipe fitting welding and forming processing equipment as described in claim 4, characterized in that: A rotary motor (334) is provided in the middle of the limiting frame (335), and a pressing roller (336) is provided at the top of the rotary motor (334).

6. The metal pipe fitting welding and forming processing equipment as described in claim 5, characterized in that: The main unit (4) of the equipment includes a fixed rectangular frame (41), a horizontal frame (42), a welding host (43), a water storage device (44), a water pump (45), and a water pipe (46). The horizontal frame (42) is integrally installed at the top of the fixed rectangular frame (41), and the two are arranged in an "L" shape. The welding host (43) is provided at the bottom of the fixed rectangular frame (41). An induction coil is provided at the top of the welding host (43), and the induction coil is sleeved on the outside of the metal pipe.

7. The metal pipe fitting welding and forming processing equipment as described in claim 6, characterized in that: The welding host (43) is provided with a water storage device (44) at the top, and a water pump (45) is provided on the outside of the water storage device (44) and connected to a water pipe (46). The top of the water pipe (46) is connected to the nozzle (6).

8. The metal pipe fitting welding and forming processing equipment as described in claim 1, characterized in that: The grinding mechanism (5) includes two sets of support structures, and the support structure includes two fixed vertical rods (51), a mounting frame (52), a reset component (53) and a grinding roller (54). The top of the two fixed vertical rods (51) is provided with a mounting frame (52), and a grinding roller (54) connected by the reset component (53) is provided inside the mounting frame (52). The two sides of the intermediate shaft of the grinding roller (54) are provided with threaded structures.

9. The metal pipe fitting welding and forming processing equipment as described in claim 8, characterized in that: The grinding mechanism (5) also includes two sets of protective plates (55), which are connected to the mounting frames (52) in the two sets of support structures that are biased towards the central axis, for use in grinding protection work.

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