Special-shaped welded pipe die set cavity structure design and welded pipe die

Abstract

The invention discloses a special-shaped welded pipe die set cavity structure design and a welded pipe die, and belongs to the technical field of welded pipe machining, the special-shaped welded pipe die set cavity structure design comprises a rack, extrusion forming mechanisms for welded pipes are arranged at the front end and the rear end of the rack, and an edge correction mechanism is arranged at the position, close to the extrusion forming mechanism at the front end, of the top of the rack; and an opposite side grinding mechanism is arranged in the middle of the top of the rack. The extrusion forming mechanism composed of the first n-shaped frame, the upper pressing roller, the lower pressing roller, the n-shaped frame, the side pressing roller and the translation air cylinder is arranged at each of the front end and the rear end of the rack, and after being extruded, a steel plate is extruded at the front end of the rack, and the edges of gaps are preliminarily aligned; the edge correcting mechanism, the opposite edge grinding mechanism and the cleaning mechanism are used for correcting, grinding and cleaning the edges of the welded pipes, the extrusion forming mechanism at the rear end of the rack is used for thoroughly aligning welding seams, and finally the laser welding machine is used for welding treatment, so that the orderliness of the welding seams and the welding quality are ensured.

Description

Technical Field

[0001] The present invention relates to a welded pipe mould, in particular to a special-shaped welded pipe mould. The present invention also relates to a welding method, in particular to a special-shaped welded pipe mould welding method, and belongs to the technical field of welded pipe processing. Background Art

[0002] The processing of special-shaped welded pipes is the process of making welded steel pipes with special cross-sections by subjecting steel strips or steel plates to a series of process treatments. During the processing, the steel strips or steel plates are gradually bent into the required special-shaped cross-sections through various forming dies. When the steel strips or steel plates are bent into a nearly closed special-shaped cross-section, the welding process is used to weld their butt joints together to form a continuous welded pipe.

[0003] Existing forming dies use extrusion to extrude welded pipes. However, during the extrusion process, especially when processing welded pipes with smaller wall thicknesses, curling or edge deformation is easily caused, resulting in uneven weld edges, inconvenient welding, and butt welding with a smaller welding surface, which affects the stability of welding.

[0004] Therefore, the cavity structure design of the special-shaped welded pipe mold group and the welded pipe mold are designed to optimize the above problems. Summary of the invention

[0005] The main purpose of the present invention is to provide a cavity structure design of a special-shaped welded pipe mold group and a welded pipe mold. The front and rear ends of the frame are provided with an extrusion forming mechanism consisting of a first shaped frame, an upper pressure roller, a lower pressure roller, a shaped frame, a side pressure roller, and a translation cylinder. After the steel plate is extruded, the gap edge is initially aligned at the front end of the frame, and then the edge correction mechanism, the edge grinding mechanism, and the cleaning mechanism are used to correct, grind and clean the edge of the welded pipe. The extrusion forming mechanism at the rear end of the frame is then used to thoroughly align the weld. Finally, a laser welding machine is used for welding to ensure the neatness of the weld and the quality of the welding. The vertical plate is inserted from the pipe seam into the interior of the welded pipe through the edge correction mechanism consisting of a second shaped frame, a first shaft rod, a first limiting roller, a vertical plate, and an inner pressure roller. The first limiting roller is used to contact the upper surface of the edge of the welding pipe, and the inner pressure roller is attached to the inner surface of the edge of the welding pipe. As the welding pipe moves, the interaction between the first limiting roller and the inner pressure roller is used to shape and correct the edge of the welding pipe to facilitate welding processing. Through the edge grinding mechanism composed of the third shaped frame, the sleeve, the second limiting roller, the second shaft rod, the grinding disc, and the beveled surface, the grinding disc can pass through the gap and grind the gap to ensure that the width of the gap is uniform. In addition, the beveled surface on the grinding disc can also symmetrically grind the upper surface of the edge of the welding pipe into a bevel to increase the welding area and improve the stability of welding. Through the cleaning mechanism composed of the carrier plate, the diversion bin, the liquid inlet pipe, the ball, the through hole, and the nozzle, the powder debris at the weld can be cleaned after the weld is ground, ensuring the welding effect.

[0006] The purpose of the present invention can be achieved by adopting the following technical solutions:

[0007] The special-shaped welded pipe mold includes a frame, the front end and the rear end of the frame are both provided with extrusion molding mechanisms for the welded pipe, an edge correction mechanism is arranged at the extrusion molding mechanism near the front end on the top of the frame, an edge grinding mechanism is arranged at the middle position of the top of the frame, a cleaning mechanism is arranged at the position of the extrusion molding mechanism near the rear end on the top of the frame, a laser welding machine is arranged behind the extrusion molding mechanism at the rear end of the frame, and a driving mechanism driven by the edge correction mechanism and the edge grinding mechanism is arranged on the side of the frame.

[0008] Preferably: the extrusion molding mechanism includes a first burr frame, an upper pressure roller, a lower pressure roller, a side pressure roller and a spacing adjustment component, the first burr frame is vertically fixed at both ends of the frame, the upper pressure roller is rotatably installed on the inner top of the first burr frame, the lower pressure roller is rotatably installed on the inner bottom of the first burr frame, the side pressure rollers are symmetrically arranged on both sides of the first burr frame, and the side of the first burr frame is provided with a spacing adjustment component for controlling the distance between the two groups of side pressure rollers.

[0009] Preferably, the translation cylinders are vertically fixed on both sides of the first U-shaped frame, and the output ends of the translation cylinders all extend into the interior of the first U-shaped frame. C-shaped frames are installed at the output ends of the translation cylinders, and the side pressure rollers are rotatably installed inside the C-shaped frames.

[0010] Preferably, the edge correction mechanism includes a second U-shaped frame, a first shaft rod, a first limiting roller, a vertical plate, and an inner pressure roller. The second U-shaped frame is fixed on the machine frame. A first shaft rod is rotatably installed between both sides of the second U-shaped frame. The driving mechanism controls the rotation of the first shaft rod. First limiting rollers are symmetrically arranged at the middle position of the first shaft rod. A vertical plate is fixed at the middle position of the top of the second U-shaped frame. The first shaft rod penetrates through the vertical plate and is rotatably connected to the vertical plate. The bottom end of the vertical plate extends into the interior of the welded pipe, and inner pressure rollers that are in fit with the inner wall of the welded pipe are symmetrically and rotatably installed on both sides of the bottom end of the vertical plate.

[0011] Preferably, the horizontal distance between the two groups of first limiting rollers is equal to the preset width of the weld seam, and the thickness of the vertical plate is less than the thickness of the weld seam.

[0012] Preferably, the opposite side grinding mechanism includes a third U-shaped frame, a bushing, a second limiting roller, a second shaft rod, a grinding disc, and an inclined surface. The third U-shaped frame is fixed on the top of the machine frame. Bushings are rotatably installed at both ends inside the third U-shaped frame. Second limiting rollers are fixed at the ends of the bushings away from the side edges of the third U-shaped frame. A second shaft rod is rotatably installed inside the bushing. A grinding disc is fixed at the middle position of the second shaft rod. The grinding disc is located between the two groups of second limiting rollers. The thickness of the outer side edge of the grinding disc is the same as the preset thickness at the weld seam. An inclined surface is provided at the connection between the thin edge and the thick edge of the grinding disc. The driving mechanism controls the reverse rotation between the second limiting roller and the grinding disc.

[0013] Preferably, the driving mechanism includes a speed reducer, a motor, a driving bevel gear, a first driven bevel gear, a second driven bevel gear, and a fixing block. The speed reducer is installed on the side of the machine frame. A motor is installed on the input shaft of the speed reducer. Driving bevel gears are installed at both ends of the second shaft rod. First driven bevel gears are installed at the ends of the bushings. Fixing blocks are fixedly installed on both sides of the third U-shaped frame. Second driven bevel gears that are in mesh with the driving bevel gear and the first driven bevel gear are installed at the bottom ends of the fixing blocks. The output shaft of the speed reducer is connected to the side of the driving bevel gear.

[0014] Preferably, a sprocket assembly is provided between the end of the bushing and the end of the first shaft rod.

[0015] Preferably, the cleaning mechanism includes a carrier plate, a diversion bin, a liquid inlet pipe, ball beads, through holes, and spray heads. The carrier plate is fixed on the top of the machine frame. A diversion bin is provided on the top of the carrier plate. A liquid inlet pipe is provided on the top of the diversion bin. Ball beads are rotatably installed at both ends of the carrier plate. Through holes that are in communication with the interior of the diversion bin are provided on the ball beads. Spray heads that are in communication with the through holes are installed at the bottoms of the ball beads.

[0016] The present invention also provides a special-shaped welded pipe mold welding method, comprising the following steps:

[0017] Step 1: After the pre-pressing and forming process, the welded pipe is inserted from the extrusion forming mechanism at the front end of the frame. The welded pipe is shaped by the mutual extrusion between the lower pressure roller, the shaped frame and the side pressure roller. A certain distance is reserved between the edges of the welded pipe, and the weld seam is not closed. The ends of the shaped frame and the side pressure roller are connected to the drive motor to provide power for the movement of the welded pipe;

[0018] Step 2: After the weld seams with fixed spacing are reserved, the weld pipe continues to move, the vertical plate passes through the weld seam, the inner pressure roller fits against the inner wall of the weld pipe, and the first limiting roller fits against the top of the weld pipe. The weld seam edge is leveled and corrected by the mutual squeezing effect of the inner pressure roller and the first limiting roller, and at the same time, the motor drives the first limiting roller to rotate to provide conveying power;

[0019] Step 3: The welded pipe continues to move after being leveled, and the top of the welded pipe fits with the second limiting roller, while the grinding disc is inserted into the inside of the weld. The thickness of the bottom of the grinding disc is the same as the preset gap of the weld. When the edge of the welded pipe is protruding, the rotation direction of the grinding disc is opposite to the moving direction of the welded pipe. The grinding disc grinds the edge of the weld, and the chamfered surface grinds the top two sides of the weld symmetrically to form an inclined weld surface. During the grinding process, the motor controls the second limiting roller and the grinding disc to rotate in the opposite direction, and provides power for conveying and grinding at the same time;

[0020] Step 4: After grinding, there are debris accumulation on the surface of the welded pipe. Connect the external water source to the liquid inlet pipe, and the water source enters the inside of the diversion chamber and sprays out from the nozzle, aiming at the side of the weld for flushing;

[0021] Step 5: The welded pipe is output from the extrusion molding mechanism at the rear end of the frame. The edge of the welded pipe is fitted together and the weld is closed by the mutual extrusion between the lower pressure roller, the shaped frame and the side pressure roller. The weld is welded by a laser welding machine and the edge of the welded pipe is connected and formed.

[0022] The beneficial effects of the present invention are:

[0023] The cavity structure design of the special-shaped welded pipe die set and the welded pipe die provided by the present invention are provided with an extrusion forming mechanism composed of a first shaped frame, an upper pressure roller, a lower pressure roller, a shaped frame, a side pressure roller, and a translation cylinder at the front and rear ends of the frame. After the steel plate is extruded, the gap edge is initially aligned by extrusion at the front end of the frame, and then the edge correction mechanism, the edge grinding mechanism, and the cleaning mechanism are used to correct, grind and clean the edge of the welded pipe, and then the extrusion forming mechanism at the rear end of the frame is used to completely align the weld, and finally a laser welding machine is used for welding, thereby ensuring the neatness of the weld and the quality of the welding;

[0024] Through the edge correction mechanism composed of the second shaped frame, the first shaft, the first limiting roller, the vertical plate, and the inner pressure roller, the vertical plate is inserted from the pipe seam into the interior of the welded pipe, the first limiting roller is used to contact the upper surface of the edge of the welded pipe, and the inner pressure roller is attached to the inner surface of the edge of the welded pipe. As the welded pipe moves, the interaction between the first limiting roller and the inner pressure roller is used to shape and correct the edge of the welded pipe, so as to facilitate welding processing;

[0025] Through the edge grinding mechanism composed of the third shaped frame, the shaft sleeve, the second limiting roller, the second shaft rod, the grinding disc and the beveled surface, the grinding disc can pass through the gaps to grind the gaps to ensure that the width of the gaps is uniform. In addition, the beveled surface on the grinding disc can also symmetrically grind the upper surface of the edge of the welded pipe into a beveled mouth to increase the welding area and improve the stability of welding.

[0026] Through the cleaning mechanism composed of a carrier plate, a diversion chamber, a liquid inlet pipe, balls, through holes, and a nozzle, powder debris at the weld can be cleaned after the weld is ground, thereby ensuring the welding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a front view of a preferred embodiment of the cavity structure design of the special-shaped welded pipe mold set and the welded pipe mold of the present invention;

[0028] Figure 2 The present invention is a special-shaped welded pipe die set cavity structure design and a preferred embodiment of the welded pipe die extrusion molding mechanism diagram;

[0029] Figure 3 It is a front view of the cavity structure design of the special-shaped welded pipe mold set and an edge correction mechanism of a preferred embodiment of the welded pipe mold of the present invention;

[0030] Figure 4 It is a cross-sectional view of the cavity structure design of the special-shaped welded pipe mold set and an edge correction mechanism of a preferred embodiment of the welded pipe mold of the present invention;

[0031] Figure 5 It is a front view of the cavity structure design of the special-shaped welded pipe mold set and a preferred embodiment of the edge grinding mechanism in the welded pipe mold of the present invention;

[0032] Figure 6 It is a cross-sectional view of the cavity structure design of the special-shaped welded pipe mold set and an edge grinding mechanism of a preferred embodiment of the welded pipe mold of the present invention;

[0033] Figure 7 It is a diagram of the cavity structure design of the special-shaped welded pipe mold set of the present invention and a cleaning mechanism diagram of a preferred embodiment of the welded pipe mold;

[0034] Figure 8 The present invention is a special-shaped welded pipe die set cavity structure design and a driving mechanism diagram of a preferred embodiment of the welded pipe die.

[0035] In the figure: 1. Frame;

[0036] 2. Extrusion molding mechanism; 201. First shaped frame; 202. Upper pressure roller; 203. Lower pressure roller; 204. shaped frame; 205. Side pressure roller; 206. Translation cylinder;

[0037] 3. Edge correction mechanism; 301. Second shaped frame; 302. First shaft; 303. First limiting roller; 304. Vertical plate; 305. Internal pressure roller;

[0038] 4. Edge grinding mechanism; 401. third bevel frame; 402. sleeve; 403. second limit roller; 404. second shaft rod; 405. grinding disc; 406. chamfered surface;

[0039] 5. cleaning mechanism; 501. carrier plate; 502. diversion chamber; 503. liquid inlet pipe; 504. ball; 505. through hole; 506. nozzle;

[0040] 6. Laser welding machine;

[0041] 7. Driving mechanism; 701. Speed ​​reducer; 702. Motor; 703. Active cone wheel;

[0042] 704, first driven cone wheel; 705, second driven cone wheel; 706, fixing block; 707, sprocket assembly. DETAILED DESCRIPTION

[0043] In order to make the technical solution of the present invention more clear and specific to those skilled in the art, the present invention is further described in detail below in conjunction with embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0044] like Figure 1-Figure 8 As shown, this embodiment provides a special-shaped welded pipe mold, including a frame 1, the front end and the rear end of the frame 1 are both provided with an extrusion molding mechanism 2 for the welded pipe, an edge correction mechanism 3 is provided at the top of the frame 1 near the front end of the extrusion molding mechanism 2, an edge grinding mechanism 4 is provided at the middle position of the top of the frame 1, a cleaning mechanism 5 is provided at the top of the frame 1 near the rear end of the extrusion molding mechanism 2, a laser welding machine 6 is provided behind the rear end of the extrusion molding mechanism 2 of the frame 1, and a driving mechanism 7 driven by the edge correction mechanism 3 and the edge grinding mechanism 4 is provided on the side of the frame 1.

[0045] The overall working principle: after the pre-pressing and forming process, the welded pipe is inserted from the extrusion forming mechanism 2 at the front end of the frame 1, a certain distance is reserved between the edges of the welded pipe, and the weld is not closed. Then the welded pipe is moved toward the edge correction mechanism 3, and the edge of the welded pipe is leveled and corrected to ensure that the two edges can be aligned. Then the welded pipe is moved toward the opposite edge grinding mechanism 4, the width of the weld is ground evenly, and the bevel is ground at the top of the weld. After grinding, the cleaning mechanism 5 is used to remove the debris generated by grinding to prevent the debris from affecting the welding. After cleaning, the edge of the welded pipe is fitted from the extrusion forming mechanism 2 at the rear end of the frame 1, and the weld is closed. Finally, the weld is welded by the laser welding machine 6, and the edge of the welded pipe is connected and formed.

[0046] In this embodiment, the extrusion molding mechanism 2 includes a first bead frame 201, an upper pressure roller 202, a lower pressure roller 203, a side pressure roller 205 and a spacing adjustment component. The first bead frame 201 is vertically fixed at both ends of the frame 1. The upper pressure roller 202 is rotatably installed on the inner top of the first bead frame 201, and the lower pressure roller 203 is rotatably installed on the inner bottom of the first bead frame 201. Side pressure rollers 205 are symmetrically arranged on both sides of the first bead frame 201, and a spacing adjustment component for controlling the distance between the two groups of side pressure rollers 205 is arranged on the side of the first bead frame 201.

[0047] Local working principle: When the welded pipe is extruded, the spacing between the pressure rollers 205 on both sides is first adjusted using the spacing adjustment component. The spacing between the side pressure rollers 205 at the front end of the frame 1 is larger than the width of the welded pipe after forming, while the spacing between the side pressure rollers 205 at the rear end of the frame 1 is the same as the width of the welded pipe after forming. After the welded pipe is extruded by the upper pressure roller 202, the lower pressure roller 203, and the side pressure roller 205 at the front end of the frame 1, the welded pipe will not be completely closed. However, after being extruded by the upper pressure roller 202, the lower pressure roller 203, and the side pressure roller 205 at the rear end of the frame 1, the gap on the welded pipe will be closed.

[0048] In this embodiment, the translation cylinder 206 is vertically fixed on both sides of the first rib-shaped frame 201, and the output ends of the translation cylinder 206 extend to the interior of the first rib-shaped frame 201. The output ends of the translation cylinder 206 are installed with rib-shaped frames 204, and the side pressure roller 205 is rotatably installed inside the rib-shaped frame 204.

[0049] Local working principle: by starting the translation cylinder 206, the yoke 204 is pushed horizontally to move and the spacing between the side pressure rollers 205 is adjusted.

[0050] In this embodiment, the edge correction mechanism 3 includes a second bevel frame 301, a first shaft 302, a first limiting roller 303, a vertical plate 304 and an inner pressure roller 305. The second bevel frame 301 is fixed on the frame 1. The first shaft 302 is rotatably installed between the two sides of the second bevel frame 301. The driving mechanism 7 controls the rotation of the first shaft 302. The first limiting roller 303 is symmetrically arranged at the middle position of the first shaft 302. A vertical plate 304 is fixed at the middle position of the top of the second bevel frame 301. The first shaft 302 penetrates the vertical plate 304 and is rotatably connected with the vertical plate 304. The bottom end of the vertical plate 304 extends to the inside of the welded pipe. The inner pressure rollers 305 that fit the inner wall of the welded pipe are symmetrically rotatably installed on both sides of the bottom end of the vertical plate 304.

[0051] Local working principle: the weld pipe moves linearly toward the edge correction mechanism 3, the vertical plate 304 passes through the weld, the inner pressure roller 305 fits against the inner wall of the weld pipe, and the first limiting roller 303 fits against the top of the weld pipe, and the weld edge is leveled and corrected by utilizing the mutual squeezing effect of the inner pressure roller 305 and the first limiting roller 303, while the driving mechanism 7 controls the rotation of the first shaft 302 to ensure stable movement of the weld pipe.

[0052] In this embodiment, the horizontal spacing between the two groups of first limiting rollers 303 is equal to the preset width of the weld, and the thickness of the vertical plate 304 is less than the thickness of the weld.

[0053] Local working principle: When the vertical plate 304 passes through the weld, no friction will occur between the weld and the weld to ensure the stable movement of the welded pipe, and the horizontal spacing of the first limiting roller 303 is equal to the preset width of the weld. The first limiting roller 303 can be completely in contact with the welded pipe to ensure the shaping effect of the welded pipe.

[0054] In this embodiment, the edge grinding mechanism 4 includes a third bevel frame 401, a sleeve 402, a second limiting roller 403, a second shaft rod 404, a grinding disc 405 and a chamfered surface 406. The third bevel frame 401 is fixed on the top of the frame 1. The sleeves 402 are rotatably installed at both ends of the third bevel frame 401. The second limiting roller 403 is fixed to one end of the sleeve 402 away from the side of the third bevel frame 401. The second shaft rod 404 is rotatably installed inside the sleeve 402. A grinding disc 405 is fixed at the middle position of the second shaft rod 404. The grinding disc 405 is located between the two groups of second limiting rollers 403. The thickness of the outer edge of the grinding disc 405 is the same as the preset thickness at the weld. A chamfered surface 406 is provided at the connection between the thin edge and the thick edge of the grinding disc 405. The driving mechanism 7 controls the reverse rotation between the second limiting roller 403 and the grinding disc 405.

[0055] Local working principle: the weld pipe continues to move after being leveled, and the top of the weld pipe fits against the second limiting roller 403. The driving mechanism 7 drives the second limiting roller 403 to rotate, providing power for the movement of the weld pipe, and the grinding disc 405 is inserted into the inside of the weld. The thickness of the bottom of the grinding disc 405 is the same as the preset gap of the weld. When the edge of the weld pipe is protruding, the rotation direction of the grinding disc 405 is opposite to the moving direction of the weld pipe. The grinding disc 405 grinds the edge of the weld. In addition, the beveled surface 406 grinds the two sides of the top of the weld symmetrically to form an inclined weld surface of the weld.

[0056] In this embodiment, the driving mechanism 7 includes a reducer 701, a motor 702, a driving bevel wheel 703, a first driven bevel wheel 704, a second driven bevel wheel 705 and a fixed block 706. The reducer 701 is installed on the side of the frame 1, and the motor 702 is installed on the input shaft of the reducer 701. The driving bevel wheel 703 is installed at both ends of the second shaft rod 404. The first driven bevel wheel 704 is installed at both ends of the sleeve 402. Fixed blocks 706 are fixedly installed on both sides of the third shaped frame 401. The bottom end of the fixed block 706 is installed with the second driven bevel wheel 705 meshing with the driving bevel wheel 703 and the first driven bevel wheel 704. The output shaft of the reducer 701 is connected to the side of the driving bevel wheel 703.

[0057] Local working principle: During the driving process of the edge grinding mechanism, the motor 702 controls the rotation of the active bevel wheel 703, and then controls the rotation of the grinding disc 405 on the second shaft 404 to perform the grinding operation. The active bevel wheel 703 cooperates with the second driven bevel wheel 705 and the first driven bevel wheel 704 to control the rotation of the second limiting roller 403 on the sleeve 402 to perform the welding pipe conveying operation. The grinding disc 405 and the second limiting roller 403 rotate in opposite directions.

[0058] In this embodiment, a sprocket assembly 707 is disposed between the end of the sleeve 402 and the end of the first shaft rod 302 .

[0059] Partial working principle: During the rotation of the sleeve 402, the sprocket assembly 707 can be used to simultaneously control the rotation of the first shaft 302 to convey during the welded pipe correction process.

[0060] In this embodiment, the cleaning mechanism 5 includes a carrier plate 501, a diversion chamber 502, a liquid inlet pipe 503, a ball 504, a through hole 505 and a nozzle 506. The carrier plate 501 is fixed to the top of the frame 1. The top of the carrier plate 501 is provided with a diversion chamber 502, and the top of the diversion chamber 502 is provided with a liquid inlet pipe 503. Balls 504 are rotatably installed at both ends of the carrier plate 501. Through holes 505 that are connected to the inside of the diversion chamber 502 are opened on the balls 504. The bottom of the balls 504 is installed with nozzles 506 that are connected to the through holes 505.

[0061] Partial working principle: After grinding, there is debris accumulation on the surface of the weld pipe. The external water source is connected to the liquid inlet pipe 503, and the water source enters the inside of the diversion chamber 502 and is sprayed out from the nozzle 506, aiming at the side of the weld for flushing. Since the ball 504 is rotatable, the nozzle 506 can be adjusted at multiple angles, which is more convenient to use.

[0062] like Figure 1-Figure 8 As shown, this embodiment provides a special-shaped welded pipe mold welding method process as follows:

[0063] Step 1: After the pre-pressing and forming process, the welded pipe is inserted into the extrusion forming mechanism 2 at the front end of the frame 1, and the welded pipe is shaped by the mutual extrusion between the lower pressure roller 203, the shaped frame 204 and the side pressure roller 205, and a certain distance is reserved between the edges of the welded pipe, and the weld seam is not closed. The ends of the shaped frame 204 and the side pressure roller 205 are connected to the drive motor to provide power for the movement of the welded pipe;

[0064] Step 2: After the weld seam with a fixed spacing is reserved, the weld pipe continues to move, the vertical plate 304 passes through the weld seam, the inner pressure roller 305 fits against the inner wall of the weld pipe, and the first limiting roller 303 fits against the top of the weld pipe. The weld seam edge is leveled and corrected by the mutual squeezing effect of the inner pressure roller 305 and the first limiting roller 303, and at the same time, the motor 702 drives the first limiting roller 303 to rotate to provide conveying power;

[0065] Step 3: The welded pipe continues to move after being leveled, and the top of the welded pipe fits with the second limiting roller 403, while the grinding disc 405 is inserted into the inside of the weld. The thickness of the bottom of the grinding disc 405 is the same as the preset gap of the weld. When the edge of the welded pipe is protruding, the rotation direction of the grinding disc 405 is opposite to the moving direction of the welded pipe. The grinding disc 405 grinds the edge of the weld. In addition, the chamfered surface 406 grinds the top two sides of the weld symmetrically to form an inclined weld surface of the weld. During the grinding process, the motor 702 controls the second limiting roller 403 and the grinding disc 405 to rotate in the opposite direction, and provides power for conveying and grinding at the same time;

[0066] Step 4: After grinding, there are debris accumulation on the surface of the weld pipe. Connect the external water source to the liquid inlet pipe 503, and the water source enters the inside of the diversion chamber 502 and sprays out from the nozzle 506 to flush the side of the weld;

[0067] Step 5: The welded pipe is output from the extrusion molding mechanism 2 at the rear end of the frame 1. The edge of the welded pipe is fitted together and the weld is closed by the mutual extrusion between the lower pressure roller 203, the shaped frame 204 and the side pressure roller 205. The weld is welded by the laser welding machine 6, and the edge of the welded pipe is connected and formed.

[0068] The above description is only a further embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and concepts of the present invention within the scope disclosed by the present invention, which belong to the protection scope of the present invention.

Claims

1. A special-shaped welded pipe mold set cavity structure welded pipe mold, comprising a frame (1), characterized in that: At both the front end and the rear end of the frame (1), there are extrusion forming mechanisms (2) for welded pipes. At the position of the extrusion forming mechanism (2) near the front end at the top of the frame (1), there is an edge correction mechanism (3). At the middle position at the top of the frame (1), there is an edge grinding mechanism (4). At the position near the rear end extrusion forming mechanism (2) at the top of the frame (1), there is a cleaning mechanism (5). Behind the rear end extrusion forming mechanism (2) of the frame (1), there is a laser welding machine (6). On the side of the frame (1), there is a driving mechanism (7) for driving the edge correction mechanism (3) and the edge grinding mechanism (4).

2. The special-shaped welded pipe mold set cavity structure welded pipe mold according to claim 1, characterized in that: The extrusion forming mechanism (2) includes a first U-shaped frame (201), an upper pressing roller (202), a lower pressing roller (203), side pressing rollers (205) and a spacing adjustment component. The first U-shaped frame (201) is vertically fixed at both ends of the frame (1). The upper pressing rollers (202) are rotatably installed at the inner top of the first U-shaped frame (201). The lower pressing roller (203) is rotatably installed at the inner bottom of the first U-shaped frame (201). The side pressing rollers (205) are symmetrically arranged on both sides inside the first U-shaped frame (201). On the side of the first U-shaped frame (201), there is a spacing adjustment component for controlling the distance between the two groups of side pressing rollers (205).

3. The special-shaped welded pipe mold set cavity structure welded pipe mold according to claim 2, characterized in that: Translation cylinders (206) are vertically fixed on both sides of the first U-shaped frame (201), and the output ends of the translation cylinders (206) all extend into the first U-shaped frame (201). The output ends of the translation cylinders (206) are all installed with U-shaped frames (204). The side pressing rollers (205) are rotatably installed inside the U-shaped frames (204).

4. The special-shaped welded pipe mold set cavity structure welded pipe mold according to claim 3, characterized in that: The edge correction mechanism (3) includes a second U-shaped frame (301), a first shaft rod (302), a first limiting roller (303), a vertical plate (304) and an inner pressing roller (305). The second U-shaped frame (301) is fixed on the frame (1). A first shaft rod (302) is rotatably installed between the two sides of the second U-shaped frame (301). The driving mechanism (7) controls the rotation of the first shaft rod (302). The first limiting rollers (303) are symmetrically arranged at the middle position of the first shaft rod (302). A vertical plate (304) is fixed at the middle position of the top of the second U-shaped frame (301). The first shaft rod (302) passes through the vertical plate (304) and is rotatably connected to the vertical plate (304). The bottom end of the vertical plate (304) extends into the welded pipe. The inner pressing rollers (305) that fit the inner wall of the welded pipe are symmetrically and rotatably installed on both sides of the bottom end of the vertical plate (304).

5. The special-shaped welded pipe mold set cavity structure welded pipe mold according to claim 4, characterized in that: The horizontal spacing between the two groups of first limiting rollers (303) is equal to the preset width of the weld seam. The thickness of the vertical plate (304) is less than the thickness of the weld seam.

6. The special-shaped welded pipe mold set cavity structure welded pipe mold according to claim 5, characterized in that: The side grinding mechanism (4) comprises a third shaped frame (401), a shaft sleeve (402), a second limiting roller (403), a second shaft rod (404), a grinding disc (405) and a beveled surface (406). The third shaped frame (401) is fixed on the top of the frame (1). Both ends of the third shaped frame (401) are rotatably mounted with shaft sleeves (402). The end of the shaft sleeve (402) away from the side of the third shaped frame (401) is fixed with a second limiting roller (403). A second shaft (404) is rotatably mounted inside the second shaft (402), a grinding disc (405) is fixed at the middle position of the second shaft (404), the grinding disc (405) is located between the two sets of second limiting rollers (403), the thickness of the outer edge of the grinding disc (405) is the same as the preset thickness at the weld, a chamfered surface (406) is provided at the connection between the thin edge and the thick edge of the grinding disc (405), and the driving mechanism (7) controls the second limiting roller (403) and the grinding disc (405) to rotate in the opposite direction.

7. The special-shaped welded pipe mold set cavity structure welded pipe mold according to claim 6, characterized in that: The driving mechanism (7) comprises a reducer (701), a motor (702), a driving bevel wheel (703), a first driven bevel wheel (704), a second driven bevel wheel (705) and a fixing block (706). The reducer (701) is mounted on the side of the frame (1). The motor (702) is mounted on the input shaft of the reducer (701). The driving bevel wheel (703) is mounted on both ends of the second shaft (404). The first driven bevel wheel (704) is mounted on both ends of the shaft sleeve (402). The fixing blocks (706) are fixedly mounted on both sides of the third shaped frame (401). The second driven bevel wheel (705) meshing with the driving bevel wheel (703) and the first driven bevel wheel (704) is mounted on the bottom end of the fixing block (706). The output shaft of the reducer (701) is connected to the side of the driving bevel wheel (703).

8. The special-shaped welded pipe mold set cavity structure welded pipe mold according to claim 7, characterized in that: A sprocket assembly (707) is provided between the end of the shaft sleeve (402) and the end of the first shaft rod (302).

9. The special-shaped welded pipe mold set cavity structure welded pipe mold according to claim 8, characterized in that: The cleaning mechanism (5) comprises a carrier plate (501), a diversion chamber (502), a liquid inlet pipe (503), a ball (504), a through hole (505) and a nozzle (506). The carrier plate (501) is fixed on the top of the frame (1). The diversion chamber (502) is provided on the top of the carrier plate (501). The liquid inlet pipe (503) is provided on the top of the diversion chamber (502). Balls (504) are rotatably mounted on both ends of the carrier plate (501). Through holes (505) communicating with the inside of the diversion chamber (502) are provided on the balls (504). The bottom of the balls (504) is provided with nozzles (506) communicating with the through holes (505).

10. A method for designing a cavity structure of a special-shaped welded pipe mold set, based on the special-shaped welded pipe mold set cavity structure welded pipe mold according to claim 9, characterized in that: The steps include: Step 1: After the pre-pressing and forming process, the welded pipe is inserted from the extrusion forming mechanism (2) at the front end of the frame (1), and the welded pipe is shaped by the mutual extrusion between the lower pressure roller (203), the shaped frame (204) and the side pressure roller (205), and a certain distance is reserved between the edges of the welded pipe. The weld seam is not closed, and the ends of the shaped frame (204) and the side pressure roller (205) are connected to a drive motor to provide power for the movement of the welded pipe; Step 2: After the weld seam with a fixed spacing is reserved, the weld pipe continues to move, the vertical plate (304) passes through the weld seam, the inner pressure roller (305) fits against the inner wall of the weld pipe, and the first limiting roller (303) fits against the top of the weld pipe. The weld seam edge is leveled and corrected by the mutual squeezing effect of the inner pressure roller (305) and the first limiting roller (303), and at the same time, the motor (702) drives the first limiting roller (303) to rotate to provide conveying power; Step 3: The welded pipe continues to move after being leveled, and the top of the welded pipe fits with the second limiting roller (403), and the grinding disc (405) is inserted into the inside of the weld. The thickness of the bottom of the grinding disc (405) is the same as the preset gap of the weld. When the edge of the welded pipe is protruding, the rotation direction of the grinding disc (405) is opposite to the moving direction of the welded pipe. The grinding disc (405) grinds the edge of the weld. In addition, the chamfered surface (406) grinds the top two sides of the weld symmetrically to form an inclined weld surface of the weld. During the grinding process, the motor (702) controls the second limiting roller (403) and the grinding disc (405) to rotate in opposite directions, and provides power for conveying and grinding at the same time; Step 4: After grinding, there is debris on the surface of the weld pipe. Connect the external water source to the liquid inlet pipe (503), and the water source enters the inside of the diversion chamber (502) and sprays out from the nozzle (506) to flush the side of the weld; Step 5: The welded pipe is output from the extrusion forming mechanism (2) at the rear end of the frame (1). The edges of the welded pipe are fitted together and the weld is closed by the mutual extrusion between the lower pressure roller (203), the shaped frame (204) and the side pressure roller (205). The weld is then welded by a laser welding machine (6) and the edges of the welded pipe are connected and formed.

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