Pipe fitting machining device and method

Abstract

The invention discloses a pipe fitting machining device and method, and aims to overcome the defects that after a metal pipe is machined, the pipe fitting needs to be manually transferred to a flattening testing machine to be detected, the labor intensity is high, and the working efficiency is low. The device comprises a forming unit and a cutting unit, a metal sheet is formed into a metal pipe through the forming unit, a welding machine is arranged on the forming unit and welds the metal pipe to form a weld joint, a cut-off machine is arranged on the cutting unit, a detection mechanism is installed on the cut-off machine and comprises a flattening disc arranged in a lifting and moving mode, and the flattening disc moves downwards to flatten the metal pipe. And observing the weld shape to judge the welding strength. According to the pipe fitting machining device, welding seam strength detection is directly completed in the metal pipe machining process, the labor intensity can be reduced, and the working efficiency is improved.

Description

Technical Field

[0001] The present invention relates to pipe fitting processing technology, and more specifically, to a pipe fitting processing device and method. Background Art

[0002] When processing thin-walled pipe fittings, first unwind a bundle of thin-walled plates, then shape the unwound plates. After shaping them into the form of pipe fittings, weld the opening positions to form complete pipe fittings. To ensure the processing quality of the pipe fittings, it is necessary to detect the weld strength of the processed pipe fittings. The commonly used detection method now is to select the processed pipe fittings and load them into a flattening testing machine. After the flattening testing machine flattens the pipe fittings, observe the shape of the weld. If the weld is V-shaped, the pipe fitting is judged unqualified; if the weld is U-shaped, the pipe fitting is judged qualified. This detection method requires a separate setting of a flattening testing machine, and manually transfer the processed pipe fittings to the flattening testing machine, resulting in high labor intensity and low work efficiency. For example, Chinese Patent Application No. 2009101840689 discloses a method for manufacturing a metal pipe, in which a metal plate is wound into the shape of a metal pipe, welded at the wound seam to obtain a metal pipe, and the internal and external welds of the metal pipe are flattened by pressure so that the welds can be seen with the naked eye. When it is necessary to detect the metal pipe, it is necessary to manually transfer the processed pipe fittings to the flattening testing machine, resulting in high labor intensity and low work efficiency. Summary of the Invention

[0003] In order to overcome the above deficiencies, the present invention provides a pipe fitting processing device and method, which directly complete the weld strength detection during the processing of metal pipes, which is beneficial to reducing labor intensity and improving work efficiency.

[0004] To solve the above technical problems, the present invention adopts the following technical solutions: A pipe fitting processing device includes a forming unit and a cutting unit. The forming unit forms a metal sheet into a metal pipe, and a welding machine is arranged on the forming unit. The welding machine welds the metal pipe to form a weld. A cutting machine is arranged on the cutting unit, and a detection mechanism is installed on the cutting machine. The detection mechanism includes a flattening disc that moves up and down. The flattening disc moves downward to flatten the metal pipe, and observes the shape of the weld to judge the welding strength.

[0005] The metal pipe is formed by shaping a long strip of metal sheet. The two side edges of the metal sheet are bent and shaped to approach each other, and the welding machine welds the two side edges of the metal sheet that approach each other to form a complete metal pipe. The metal pipe is transported to the cutting unit, and the cutting machine cuts the metal pipe into the required length. The detection mechanism is directly arranged on the cutting machine and regularly detects the metal pipe. During the detection operation, the cutting machine cuts grooves at intervals on the metal pipe, and the depth of the grooves is not less than 80% of the diameter of the metal pipe. The flattening disc moves downward to flatten the metal pipe after cutting the grooves, and observes the shape of the weld to judge the welding strength. If the weld is V-shaped, it is judged that the weld strength does not meet the standard and the metal pipe is unqualified. If the weld is U-shaped, it is judged that the weld strength meets the standard and the metal pipe is qualified.

[0006] The pipe fitting processing device of this patent application directly completes the weld strength detection during the metal pipe processing, which is beneficial to reducing the labor intensity and improving the work efficiency.

[0007] Preferably, a detection support is arranged below the flattening disc, and the metal pipe is supported on the detection support.

[0008] The detection support plays a supporting role for the metal pipe to ensure that the flattening disc can flatten the metal pipe when moving downward.

[0009] Preferably, a camera is installed on the detection mechanism. The camera takes pictures of the shape of the weld after flattening and analyzes them to judge whether the weld meets the requirements.

[0010] The camera takes pictures of the shape of the weld of the flattened metal pipe and intelligently identifies and analyzes the weld shape, so as to judge whether the weld strength meets the standard. Compared with observing the weld shape with the naked eye, the work efficiency is further improved.

[0011] Preferably, the cutting unit includes a cutting seat. The cutting machine is slidably installed on the cutting seat. A horizontally moving screw is rotatably installed on the cutting seat. A horizontally moving block is threadedly connected to the horizontally moving screw, and the horizontally moving block is fixedly connected to the cutting machine.

[0012] During the metal pipe processing, the metal pipe keeps moving forward. The cutting machine is slidably installed on the cutting seat. When cutting the metal pipe, the cutting machine first moves to a suitable position and then moves synchronously with the metal pipe, and cuts the metal pipe during this process to ensure the flatness of the cut and prevent the cutting process from hindering the conveying and moving of the metal pipe.

[0013] Preferably, a cooling unit and a shaping unit are arranged between the forming unit and the cutting unit. The cooling unit is provided with a cooling water tank. The shaping unit is provided with several pairs of horizontal shaping wheels and several pairs of vertical shaping wheels. The horizontal shaping wheels clamp and shape the metal pipe horizontally, and the vertical shaping wheels clamp and shape the metal pipe vertically.

[0014] The cooling water tank of the cooling unit cools and shapes the welded metal pipe, and the shaping unit further shapes the cooled metal pipe to ensure that the shape of the metal pipe meets the production requirements.

[0015] Preferably, a coil rack and a conveying rack are arranged behind the forming unit. The coil rack is loaded with metal coils for processing metal pipes, and the metal coils are conveyed to the forming unit through the conveying rack.

[0016] The long strip-shaped metal sheet is wound into a metal coil and loaded on the coil rack, which is convenient for unwinding and feeding. The conveying rack facilitates the conveying of the metal sheet to the forming unit.

[0017] Preferably, a guide mechanism is provided on the forming unit, and the guide mechanism includes a plurality of upper guide wheels and a plurality of lower guide wheels, and the metal sheet is sandwiched between the upper guide wheels and the lower guide wheels for transportation.

[0018] The metal sheet is first guided by the guide mechanism and then transported to the forming unit, which is conducive to the smooth transportation of the metal sheet and ensures the forming effect.

[0019] Preferably, a deburring mechanism is provided on the forming unit, and a scraper is installed on the deburring mechanism, and the scraper is close to the weld of the metal pipe.

[0020] During the transportation of metal pipes, the weld on the metal pipe passes through a scraper, which can remove burrs at the weld position and improve the quality of the metal pipe.

[0021] Preferably, a primary cutter head and a secondary cutter head are arranged at the end of the scraper, the blade of the secondary cutter head is higher than the blade of the primary cutter head, and concave arc-shaped chip guide grooves are arranged on the front sides of the primary cutter head and the secondary cutter head, and the width of the chip guide grooves gradually increases from the inside to the outside.

[0022] The weld on the metal pipe first passes through the first cutter head, and then passes through the second cutter head. The blade of the second cutter head is higher than the blade of the first cutter head. The first cutter head first performs a first-time cutting and deburring of the weld, and then the second cutter head performs a second-time cutting and deburring of the weld, so that the weld surface is flush with the outer wall of the metal pipe. The weld is cut and deburred twice, which reduces the cutting depth and avoids the occurrence of chipping.

[0023] The concave arc-shaped chip guide groove makes the chips curl and bend, and discharge them at a time with a larger chip guide groove width, preventing the chips from interfering with the cutter head and affecting the cutting effect due to poor chip discharge.

[0024] A pipe processing method adopts a pipe processing device to process a metal pipe, comprising the following steps: S1, conveying a long metal sheet to a forming unit; S2, the forming unit bends and forms the metal sheet to form a metal pipe; S3, a welding machine welds the opening of the metal pipe; S4, a cutting machine cuts the metal pipe; S5, a detection mechanism regularly detects the metal pipe, during which the cutting machine cuts grooves on the metal pipe at intervals, a flattening plate moves downward to flatten the grooved metal pipe, and the shape of the weld is observed to judge the welding strength.

[0025] The metal pipe of this patent is processed from a long strip of metal sheet through forming and welding. To ensure the quality of the metal pipe, it needs to be inspected. The inspection operation is directly completed during the processing, without the need for manual material handling to other locations for inspection by a dedicated inspection agency. During the regular inspection operation of the metal pipe, the cutting machine makes grooves at intervals on the metal pipe, and the flattening disc moves downward to flatten the metal pipe after grooving, and the welding strength is judged by observing the shape of the weld. The entire inspection process is automatically completed while the pipe fittings are being processed, greatly improving work efficiency.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The pipe fitting processing device of this patent application directly completes the weld strength inspection during the processing of the metal pipe, which is beneficial to reducing labor intensity and improving work efficiency; (2) When cutting the metal pipe, the cutting machine first moves to a suitable position and then moves synchronously with the metal pipe, and the metal pipe is cut during this process to ensure the flatness of the cut and prevent the cutting process from hindering the conveying and movement of the metal pipe; (3) During the conveying process of the metal pipe, the weld on the metal pipe passes through a scraper, which can remove the burrs at the weld position and improve the quality of the metal pipe; (4) The weld passes through the primary cutting head and the secondary cutting head successively, and the burrs are removed by cutting twice, reducing the cutting depth and avoiding the phenomenon of tool breakage. Brief Description of the Drawings

[0027] Figure 1 is the structural schematic diagram of the present invention.

[0028] Figure 2 is the structural diagram of the forming unit of the present invention.

[0029] Figure 3 is the structural diagram of the deburring mechanism of the present invention.

[0030] Figure 4 is the structural diagram of the vertical shaping frame of the present invention.

[0031] Figure 5 is the structural diagram of the horizontal shaping frame of the present invention.

[0032] Figure 6 is the structural diagram of the shaping unit of the present invention.

[0033] Figure 7 is the structural diagram of the cutting unit of Embodiments 1 and 2 of the present invention.

[0034] Figure 8 is the structural diagram of the cutting unit of Embodiments 3 and 4 of the present invention.

[0035] Figure 9 is the partial side view of the scraper of Embodiments 2 and 4 of the present invention.

[0036] Figure 10It is a partial front view of the blade of Embodiments 2 and 4 of the present invention.

[0037] Figure 11 It is a schematic diagram of the straightening mechanism of Embodiment 4 of the present invention.

[0038] Figure 12 It is a cross-sectional view of the annular straightening wheel of Embodiment 4 of the present invention.

[0039] In the figure: 1, forming unit; 2, cutting unit; 3, unwind rack; 4, conveying rack; 5, guiding mechanism; 6, upper guide wheel; 7, lower guide wheel; 8, vertical shaping frame; 9, horizontal shaping frame; 10, vertical plate; 11, fixed seat; 12, movable seat; 13, fixed shaft; 14, movable shaft; 15, vertical adjustment screw; 16, driving shaft; 17, horizontal base; 18, horizontal adjustment screw; 19, horizontal slider; 20, support pillar; 21, welding machine; 22, shaping mechanism; 23, shaping ring; 24, turbine tooth; 25, turbine rod; 26, deburring mechanism; 27, blade; 28, deburring base; 29, tool holder; 30, lifting seat; 31, cutting machine; 32, cutting seat; 33, transverse movement screw; 34, detection mechanism; 35, flattening disc; 36, detection support; 37, detection piston cylinder; 38, cooling unit; 39, shaping unit; 40, straightening mechanism; 41, straightening ring; 42, primary cutter head; 43, secondary cutter head; 44, chip guide groove; 45, camera; 46, straightening seat; 47, annular straightening wheel; 48, spiral groove; 49, straightening piston cylinder; 50, guiding column; 51, connecting ring; 52, straightening rib; 53, mounting seat; 54, sliding seat; 55, positioning spring; 56, slide rail; 57, chute; 58, touch plate; 59, abutting spring; 60, retraction groove; 61, conductive contact; 62, mounting groove; 63, guide groove. Detailed implementation manners

[0040] The technical solutions of the present invention will be further described specifically through specific embodiments in conjunction with the drawings: Embodiment 1: A pipe fitting processing device (see Figures 1 to 7 ), which includes a forming unit 1 and a cutting unit 2. The forming unit 1 forms a metal sheet into a metal pipe. A unwind rack 3 and a conveying rack 4 are arranged behind the forming unit 1. A metal coil for processing the metal pipe is loaded on the unwind rack 3, and the metal coil is conveyed to the forming unit 1 through the conveying rack 4. The long strip-shaped metal sheet is wound into a metal coil and loaded on the unwind rack 3, which is convenient for unwinding and feeding. The conveying rack 4 facilitates the conveyance of the metal sheet to the forming unit 1. A number of rotatably arranged guide rollers are installed on the conveying rack 4, and the metal sheet is supported on the guide rollers for conveyance.

[0041] A guiding mechanism 5 is provided on the forming unit 1. The guiding mechanism 5 includes a number of upper guide wheels 6 and a number of lower guide wheels 7. The metal sheet is conveyed between the upper guide wheels 6 and the lower guide wheels 7. In this application, two upper guide wheels 6 are provided and three lower guide wheels 7 are provided.

[0042] A vertical shaping frame 8 and a horizontal shaping frame 9 are provided on the forming unit 1. The vertical shaping frame 8 and the horizontal shaping frame 9 are arranged alternately. The horizontal shaping frames 9 are provided on both the front and rear sides of the guiding mechanism 5. The vertical shaping frame 8 includes two oppositely arranged vertical plates 10. A fixed seat 11 and a movable seat 12 are installed on the vertical plates 10. The fixed seat 11 is firmly installed on the vertical plate 10, and the movable seat 12 is vertically slidably installed on the vertical plate 10. A fixed shaft 13 is installed between the fixed seats 11 on the two vertical plates 10, and a movable shaft 14 is installed between the movable seats 12 on the two vertical plates 10. Vertical shaping wheels are installed on both the fixed shaft 13 and the movable shaft 14. A vertical adjustment screw 15 is installed on the vertical plate 10. The vertical adjustment screw 15 is threadedly connected to the movable seat 12. The rotation of the vertical adjustment screw 15 realizes the lifting movement of the movable seat 12. A rotatably arranged drive shaft 16 is installed between the two vertical plates 10. The vertical adjustment screw 15 and the drive shaft 16 are driven through the cooperation of a worm and a turbine. The rotation of the drive shaft 16 realizes the synchronous lifting movement of the movable seats 12 on the two vertical plates 10, thereby adjusting the distance between the two vertical shaping wheels.

[0043] The horizontal shaping frame 9 includes a horizontal base 17 and a horizontal adjustment screw 18. Two slidably arranged horizontal sliders 19 are installed on the horizontal base 17. Two threaded sections with opposite spiral directions are provided on the horizontal adjustment screw 18. The two threaded sections are respectively threadedly connected to the two horizontal sliders 19. The rotation of the horizontal adjustment screw 18 realizes the mutual approach or mutual separation of the two horizontal sliders 19. A support column 20 is installed on the horizontal slider 19, and a horizontal shaping wheel is installed on the support column 20. The two horizontal shaping wheels are arranged oppositely.

[0044] Along the conveying direction of the metal tube, the distance between the two opposite horizontal shaping wheels gradually decreases, and the distance between the two opposite vertical shaping wheels gradually increases, so as to realize the gradual bending deformation of the metal sheet and finally form a metal tube. The outer wall of the lower vertical shaping wheel is of an inward concave arc structure. At the beginning stage, the outer wall of the upper vertical shaping wheel is of an outward convex arc. The two vertical shaping wheels press the metal sheet into an arc structure. As the metal sheet is conveyed forward, the radius of curvature of the metal sheet gradually decreases. Until a semicircle is formed, the outer wall of the upper vertical shaping wheel is of an inward concave arc, and the two sides of the semicircular metal sheet are squeezed toward the middle, so that the opening of the metal sheet gradually closes to form a metal tube.

[0045] A welding machine 21 is provided on the forming unit 1. The welding machine 21 welds the metal pipe to form a weld seam. After the metal sheet is formed onto the metal pipe, it is welded by the welding machine 21, and the weld seam is placed at the highest position in the circumferential direction of the metal pipe. A shaping mechanism 22 is provided near the welding machine 21 on the forming unit 1. The metal pipe first passes through the shaping mechanism 22 and then is welded. The shaping mechanism 22 includes a rotatably arranged shaping ring 23. The shaping ring 23 is sleeved on the metal pipe. A section of turbine teeth 24 is provided on the outer wall of the shaping ring 23. The turbine teeth 24 mesh and drive a turbine rod 25. The forward and reverse rotation of the turbine rod 25 realizes the forward and reverse rotation of the shaping ring 23, thereby shaping the metal pipe.

[0046] A deburring mechanism 26 is provided on the forming unit 1. A scraper 27 is installed on the deburring mechanism 26. The scraper 27 abuts against the weld seam of the metal pipe. The deburring mechanism 26 includes a deburring base 28 and two tool holders 29. Two lift seats 30 that move up and down are installed on the deburring base 28. The tool holders 29 are horizontally movably installed on the lift seats 30. The scraper 27 is installed on any one of the tool holders 29. When replacing the scraper 27, the new scraper 27 is replaced on the vacant tool holder 29, and the positions of the lift seats 30 and the tool holders 29 are adjusted. After the adjustment is in place, the newly replaced scraper 27 can perform the cutting and deburring operation on the metal pipe. Then move the other tool holder 29, and remove the old scraper 27 on this tool holder 29. There is no need to stop the machine to change the tool, realizing the continuous processing of the metal pipe.

[0047] A cutting machine 31 is provided on the cutting unit 2. The cutting unit 2 includes a cutting seat 32. The cutting machine 31 is slidably installed on the cutting seat 32. A horizontally moving screw 33 that rotates is installed on the cutting seat 32. A cross slide block is threadedly connected to the horizontally moving screw 33. The cross slide block is fixedly connected to the cutting machine 31. The horizontally moving screw 33 is driven by a motor to rotate, and the rotation of the horizontally moving screw 33 realizes the movement of the cutting machine 31. A saw blade is provided on the cutting machine 31. The saw blade is rotatably installed on a moving seat. A cutting motor is installed on the moving seat. The output shaft of the cutting motor is connected to the saw blade. A cutting piston cylinder is installed on the cutting machine 31. The moving seat is slidably installed on the cutting machine 31. The telescopic rod of the cutting piston cylinder is connected to the moving seat. When the telescopic rod of the cutting piston cylinder extends outwards, the saw blade approaches the metal pipe and cuts the metal pipe. When the telescopic rod of the cutting piston cylinder retracts, the saw blade is separated from the metal pipe, facilitating the conveying of the metal pipe.

[0048] A detection mechanism 34 is installed on the cutting machine 31. The detection mechanism 34 includes a flattening disc 35 that moves up and down. The flattening disc 35 moves downwards to flatten the metal pipe, and the welding strength is judged by observing the shape of the weld seam. A detection support 36 is provided below the flattening disc 35. The metal pipe is supported on the detection support 36. A detection piston cylinder 37 is provided on the detection mechanism 34. The telescopic rod of the detection piston cylinder 37 is connected to the flattening disc 35.

[0049] A cooling unit 38 and a shaping unit 39 are arranged between the forming unit 1 and the cutting unit 2. The cooling unit 38 is placed between the deburring mechanism 26 and the shaping unit 39. The cooling unit 38 is provided with a cooling water tank. The shaping unit 39 is provided with several pairs of horizontal shaping wheels and several pairs of vertical shaping wheels. The horizontal shaping wheels clamp and shape the metal tube horizontally, and the vertical shaping wheels clamp and shape the metal tube vertically.

[0050] On the shaping unit 39, a horizontal shaping frame 9 corresponding to the horizontal shaping wheels is provided, and a vertical shaping frame 8 corresponding to the vertical shaping wheels is provided. The vertical shaping frame 8 and the horizontal shaping frame 9 are arranged alternately. The horizontal shaping frame 9 includes a horizontal base 17 and a horizontal adjusting screw 18. Two horizontally sliding horizontal sliders 19 are installed on the horizontal base 17. The horizontal adjusting screw 18 is provided with thread segments with opposite spiral directions at both ends, and the two thread segments are respectively threadedly connected to the two horizontal sliders 19. When the horizontal adjusting screw 18 rotates, the two horizontal sliders 19 approach or move away from each other. A support column 20 is installed on the horizontal slider 19. Horizontal shaping wheels are installed on the support columns 20 on the shaping unit 39. The two horizontal shaping wheels are arranged oppositely. A shaping annular groove is provided on the outer wall of the horizontal shaping wheel, and the shaping annular groove is adapted to the outer wall of the metal tube.

[0051] The vertical shaping frame 8 on the shaping unit 39 includes two oppositely arranged vertical plates 10. A fixed seat 11 and a movable seat 12 are installed on the vertical plates 10. The fixed seat 11 is fixedly installed on the vertical plate 10, and the movable seat 12 is vertically slidably installed on the vertical plate 10. A fixed shaft 13 is installed between the fixed seats 11 on the two vertical plates 10, and a movable shaft 14 is installed between the movable seats 12 on the two vertical plates 10. Vertical shaping wheels are installed on both the fixed shaft 13 and the movable shaft 14. A vertical adjusting screw 15 is installed on the vertical plate 10, and the vertical adjusting screw 15 is threadedly connected to the movable seat 12. When the vertical adjusting screw 15 rotates, the movable seat 12 moves up and down. A rotatably arranged driving shaft 16 is installed between the two vertical plates 10. The vertical adjusting screw 15 and the driving shaft 16 are driven by the cooperation of a worm and a turbine. When the driving shaft 16 rotates, the movable seats 12 on the two vertical plates 10 move up and down synchronously, thereby adjusting the distance between the two vertical shaping wheels. A shaping annular groove is provided on the outer wall of the vertical shaping wheel, and the shaping annular groove is adapted to the outer wall of the metal tube.

[0052] Two straightening mechanisms 40 are arranged before and after on the shaping unit 39. The straightening mechanism 40 includes a rotatably arranged straightening ring 41, a pair of horizontal straightening wheels, and a pair of vertical straightening wheels. The metal tube first passes through the straightening ring 41, then passes between the two vertical straightening wheels, and finally passes between the two horizontal straightening wheels, thereby realizing the straightening operation of the metal tube. A straightening worm driven by a motor is provided on the straightening mechanism 40, and a circle of straightening turbines is provided on the straightening ring 41. The worm and the turbine are in driving connection.

[0053] A pipe fitting processing method uses a pipe fitting processing device to process a metal pipe, including the following steps: S1, conveying a long strip of metal sheet to the forming unit 1; the long strip of metal sheet is wound into a metal coil and loaded on the unwind rack 3, and after unwinding, it is conveyed to the forming unit 1 through the conveying rack 4.

[0054] S2, the forming unit 1 bends and forms the metal sheet to form a metal pipe; along the conveying direction of the metal pipe, the distance between the two opposite horizontal forming wheels gradually decreases, and the distance between the two opposite vertical forming wheels gradually increases, so as to gradually bend and deform the metal sheet, and finally form a metal pipe. The outer wall of the lower vertical forming wheel is of an inward concave arc structure. At the beginning stage, the outer wall of the upper vertical forming wheel is of an outward convex arc. The two vertical forming wheels press the metal sheet into an arc structure. As the metal sheet is conveyed forward, the radius of curvature of the metal sheet gradually decreases. Until a semi-circle is formed, the outer wall of the upper vertical forming wheel is of an inward concave arc, squeezing the two sides of the semi-circular metal sheet towards the middle, and gradually closing the opening of the metal sheet to form a metal pipe.

[0055] S3, the welding machine 21 welds the opening of the metal pipe. The metal pipe is welded while being conveyed to achieve continuous operation. After welding, the weld seam located at the upper part of the circumference of the metal pipe passes through the scraper 27 of the deburring mechanism 26, and the scraper 27 can remove the burrs at the weld seam position, improving the quality of the metal pipe. After the deburring operation of the metal pipe, it is cooled through a cooling water tank and then shaped through the shaping unit 39.

[0056] S4, the cutting machine 31 cuts the metal pipe; the cutting machine 31 first moves to a suitable position, and then moves synchronously with the metal pipe. The telescopic rod of the cutting piston cylinder extends outwards to make the saw blade contact the metal pipe to achieve cutting. After cutting, the telescopic rod of the cutting piston cylinder retracts, separating the saw blade from the metal pipe for shearing the next section of the metal pipe.

[0057] S5, the detection mechanism 34 regularly detects the metal pipe. During detection, the cutting machine 31 cuts grooves on the metal pipe at intervals. The distance between two adjacent grooves is 95 mm. The flattening disc 35 moves downwards to flatten the metal pipe after grooving, and observes the shape of the weld seam to judge the welding strength. The depth of the groove is not less than 80% of the diameter of the metal pipe. The detection piston cylinder 37 drives the flattening disc 35 to move downwards to flatten the metal pipe after grooving, and observes the shape of the weld seam to judge the welding strength. If the weld seam is V-shaped, it is determined that the welding strength does not meet the standard and the metal pipe is unqualified. If the weld seam is U-shaped, it is determined that the welding strength meets the standard and the metal pipe is qualified.

[0058] The metal pipe of this patent is processed by forming and welding a long strip of metal sheet. To ensure the quality of the metal pipe, it needs to be detected. The detection operation is directly completed during the processing, without the need for manual material taking to other positions for detection by a special detection mechanism 34. During the regular detection operation of the metal pipe, the cutting machine 31 cuts grooves at intervals on the metal pipe, and the flattening disc 35 moves downward to flatten the metal pipe after grooving, and observes the weld shape to judge the welding strength. The entire detection process is automatically completed while the pipe fittings are being processed, greatly improving the work efficiency.

[0059] Embodiment 2: A pipe fitting processing device (see Figure 9 , Figure 10 ), its structure is similar to that of Embodiment 1. The main difference is that in this embodiment, a primary cutting head 42 and a secondary cutting head 43 are provided at the end of the scraper 27. The end faces of the primary cutting head 42 and the secondary cutting head 43 are both inclined upward from the cutting edge end to the other end. The cutting edge of the secondary cutting head 43 is higher than the cutting edge of the primary cutting head 42. Therefore, the cutting edge of the secondary cutting head 43 is closer to the weld. Concave arc-shaped chip guiding grooves 44 are provided on the front side surfaces of the primary cutting head 42 and the secondary cutting head 43, and the width of the chip guiding grooves 44 gradually increases from the inside to the outside. The cutting edges of the primary cutting head 42 and the secondary cutting head 43 are both concave arc-shaped structures, and the major diameter of the curvature of the cutting edge of the primary cutting head 42 is greater than the major diameter of the curvature of the cutting edge of the secondary cutting head 43.

[0060] The weld on the metal pipe first passes through the primary cutting head 42 and then through the secondary cutting head 43. The cutting edge of the secondary cutting head 43 is higher than the cutting edge of the primary cutting head 42. The primary cutting head 42 first performs a primary cutting to remove burrs on the weld, and then the secondary cutting head performs a secondary cutting to remove burrs on the weld, making the weld surface flush with the outer wall of the metal pipe. The weld is cut and deburred in two steps, reducing the cutting depth and avoiding the phenomenon of tool breakage. The concave arc-shaped chip guiding grooves 44 make the chips wind and bend and are discharged once to the wider part of the chip guiding grooves 44, preventing the chip discharge from being blocked and interfering with the cutting head, which affects the cutting effect. Other structures are the same as those in Embodiment 1.

[0061] A pipe fitting processing method, its steps are similar to those in Embodiment 1. The main difference is that in step S3 of this embodiment, after welding is completed, the weld placed on the upper part of the circumference of the metal pipe passes through the deburring mechanism 26. The weld first passes through the primary cutting head 42 and then through the secondary cutting head 43. The primary cutting head 42 first performs a primary cutting to remove burrs on the weld, and then the secondary cutting head performs a secondary cutting to remove burrs on the weld, making the weld surface flush with the outer wall of the metal pipe. Other steps are the same as those in Embodiment 1.

[0062] Embodiment 3: A pipe fitting processing device (see Figure 8), its structure is similar to that of Embodiment 1. The main difference is that in this embodiment, a camera 45 is installed on the detection mechanism 34. The camera 45 is placed in front of the flattening disc 35. The camera 45 takes pictures of the shape of the welded seam after flattening and analyzes it to determine whether the welded seam meets the requirements. By taking pictures of the shape of the welded seam of the flattened metal pipe through the camera 45 and intelligently identifying and analyzing the shape of the welded seam, it can be determined whether the strength of the welded seam meets the standard. Compared with observing the shape of the welded seam with the naked eye, the work efficiency is further improved. Other structures are the same as those in Embodiment 1.

[0063] A pipe fitting processing method, the steps of which are similar to those in Embodiment 1. The main difference is that in step S5 of this embodiment, the detection mechanism 34 periodically detects the metal pipe. During the detection, the cutting machine 31 makes grooves on the metal pipe at intervals. The distance between two adjacent grooves is 95 mm. The flattening disc 35 moves downward to flatten the metal pipe after grooving, and observes the shape of the welded seam to judge the welding strength. By taking pictures of the shape of the welded seam of the flattened metal pipe through the camera 45 and intelligently identifying and analyzing the shape of the welded seam, it can be determined whether the strength of the welded seam meets the standard. Other steps are the same as those in Embodiment 1.

[0064] Embodiment 4: A pipe fitting processing device (see Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 ), its structure is similar to that of Embodiment 1. The main difference is that in this embodiment, a primary cutting head 42 and a secondary cutting head 43 are provided at the end of the scraper 27. The end faces of the primary cutting head 42 and the secondary cutting head 43 are both inclined upward from the cutting edge end to the other end. The cutting edge of the secondary cutting head 43 is higher than the cutting edge of the primary cutting head 42. Therefore, the cutting edge of the secondary cutting head 43 is closer to the welded seam. Concave arc-shaped chip guide grooves 44 are provided on the front side surfaces of the primary cutting head 42 and the secondary cutting head 43. The width of the chip guide groove 44 gradually increases from inside to outside. The cutting edges of the primary cutting head 42 and the secondary cutting head 43 are both concave and arc-shaped structures. The major diameter of the curvature of the cutting edge of the primary cutting head 42 is larger than the major diameter of the curvature of the cutting edge of the secondary cutting head 43.

[0065] The welded seam on the metal pipe first passes through the primary cutting head 42 and then through the secondary cutting head 43. The cutting edge of the secondary cutting head 43 is higher than the cutting edge of the primary cutting head 42. The primary cutting head 42 first performs a primary cutting to remove burrs from the welded seam, and then the secondary cutting head performs a secondary cutting to remove burrs from the welded seam, making the surface of the welded seam flush with the outer wall of the metal pipe. The welded seam is cut and deburred in two steps, reducing the cutting depth and avoiding the phenomenon of tool breakage. The concave arc-shaped chip guide groove 44 makes the chips wind and bend and discharges them out at one time with a larger width of the chip guide groove 44, preventing the chip discharge from being blocked and interfering with the cutting head, affecting the cutting effect.

[0066] A camera 45 is installed on the detection mechanism 34. The camera 45 is placed in front of the flattening disc 35. The camera 45 takes pictures of the shape of the welded seam after flattening and analyzes it to determine whether the welded seam meets the requirements. The shape of the welded seam of the flattened metal pipe is photographed by the camera 45, and the shape of the welded seam is intelligently identified and analyzed to determine whether the strength of the welded seam meets the standard. Compared with observing the shape of the welded seam with the naked eye, the work efficiency is further improved. A shaping unit 39 is arranged behind the cutting unit 2. A straightening mechanism 40 is arranged on the shaping unit 39. There are two straightening mechanisms 40 arranged before and after. The straightening mechanism 40 includes a straightening seat 46 and an annular straightening wheel 47. A spiral groove 48 is arranged on the outer wall of the annular straightening wheel 47. A straightening piston cylinder 49 and a guide post 50 are installed on the straightening seat 46. The annular straightening wheel 47 is rotatably connected with a connecting ring 51. The telescopic rod of the straightening piston cylinder 49 is connected with the connecting ring 51. A number of arc-shaped straightening ridges 52 are arranged on the inner wall of the annular straightening wheel 47. The metal pipe passes through the annular straightening wheel 47. During the forward transportation of the metal pipe, the straightening piston cylinder 49 drives the annular straightening wheel 47 to move reciprocally. During the movement, the spiral groove 48 cooperates with the guide post 50 to realize the rotation of the annular straightening wheel 47. The annular straightening wheel 47 moves and rotates at the same time. The straightening ridges 52 contact and rub against the outer wall of the metal pipe to straighten the metal pipe, and the straightening effect is good. Multiple arc-shaped straightening ridges 52 are used to contact the metal pipe instead of directly contacting the inner wall of the annular straightening wheel 47 with the metal pipe, which reduces the contact area and increases the contact range, can reduce the contact friction resistance, and improve the straightening effect.

[0067] An installation seat 53 is installed on the inner wall of the annular straightening wheel 47. A sliding seat 54 that moves circumferentially is installed on the installation seat 53. Positioning springs 55 are connected to both ends of the sliding seat 54. A radial slide rail 56 is arranged on the sliding seat 54. A slide groove 57 is arranged on the straightening ridge 52. The slide groove 57 is adaptively connected with the slide rail 56. A touch plate 58 is arranged on the straightening ridge 52. A contact spring 59 is installed between the slide groove 57 and the slide rail 56. The touch plate 58 abuts against the installation seat 53. Two yielding grooves 60 are arranged on the installation seat 53. The touch plate 58 is placed in the middle position between the two yielding grooves 60. A conductive contact piece 61 is installed at the bottom of the yielding groove 60. The conductive contact piece 61 is electrically connected to an alarm.

[0068] During the normal straightening operation of the metal pipe, during the straightening process when the straightening ridge 52 contacts the metal pipe, the circumferential movement amount of the straightening ridge 52 is within the set range, and the touch plate 58 will not move to the position of the yielding groove 60. When the deformation amount of the metal pipe is too large and it cannot be normally straightened, the straightening ridge 52 in contact with the metal pipe is pushed circumferentially, causing the touch plate 58 to move into the yielding groove 60. At this time, the conductive contact piece 61 is turned on, and the alarm gives an alarm to remind the staff, enabling the staff to handle it in time. Moreover, during the process of the touch plate 58 moving into the yielding groove 60, the straightening ridge 52 moves radially outward to prevent the straightening ridge 52 from getting stuck with the metal pipe.

[0069] The straightening ridges 52 are arranged in several circles, with three straightening ridges 52 evenly distributed in each circle, and the straightening ridges 52 in adjacent circles are arranged in a staggered manner. An installation groove 62 is provided on the mounting seat 53, the straightening ridges 52 are installed in the installation groove 62, a guide groove 63 is provided on the side wall of the installation groove 62, and the sliding seat 54 is slidably installed in the guide groove 63. The positioning spring 55 abuts between the end of the sliding seat 54 and the end of the guide groove 63. A yielding groove 60 is provided on the bottom surface of the installation groove 62, and the bottom surface of the installation groove 62 is of an arc-shaped structure.

[0070] Two straightening mechanisms 40 are arranged front and back. The straightening mechanism 40 further includes a pair of horizontal straightening wheels and a pair of vertical straightening wheels. The metal pipe first passes through the annular straightening wheel 47, then passes between the two vertical straightening wheels, and finally passes between the two horizontal straightening wheels, so as to realize the straightening operation of the metal pipe. Other structures are the same as those in Embodiment 1.

[0071] A pipe fitting processing method has steps similar to those in Embodiment 1. The main difference lies in step S3 in this embodiment. After welding is completed, the weld seam located on the upper part of the circumference of the metal pipe passes through the deburring mechanism 26. The weld seam first passes through the primary cutting tool head 42 and then through the secondary cutting tool head 43. The primary cutting tool head 42 first performs a primary cutting deburring on the weld seam, and then the secondary cutting tool head performs a secondary cutting deburring on the weld seam, so that the surface of the weld seam is flush with the outer wall of the metal pipe. In S5, the detection mechanism 34 regularly detects the metal pipe. During detection, the cutting machine 31 makes cuts at intervals on the metal pipe, with a distance of 95 mm between adjacent cuts. The flattening disc 35 moves downward to flatten the metal pipe after cutting the groove, and observes the shape of the weld seam to judge the welding strength. The shape of the weld seam of the flattened metal pipe is photographed by the camera 45, and the shape of the weld seam is intelligently identified and analyzed, so as to judge whether the weld strength meets the standard. Other steps are the same as those in Embodiment 1.

[0072] The above-described embodiments are only preferred solutions of the present invention, and do not impose any form of limitation on the present invention. There are other variants and modifications without exceeding the technical solutions recorded in the claims.

Claims

1. A pipe fitting processing device, characterized in that, It includes a forming unit and a cutting unit. The forming unit forms a metal sheet into a metal tube. A welding machine is arranged on the forming unit, and the welding machine welds the metal tube to form a weld seam. A cutting machine is arranged on the cutting unit, and a detection mechanism is installed on the cutting machine. The detection mechanism includes a flattening disc arranged to move up and down. The flattening disc moves downward to flatten the metal tube, and the shape of the weld seam is observed to judge the welding strength.

2. The pipe fitting processing device according to claim 1, characterized in that, A detection support is arranged below the flattening disc, and the metal tube is supported on the detection support.

3. The pipe fitting processing device according to claim 1, characterized in that, A camera is installed on the detection mechanism. The camera takes pictures of the shape of the flattened weld seam and analyzes it to judge whether the weld seam meets the requirements.

4. A pipe fitting processing device according to claim 1, characterized in that, The cutting unit includes a cutting seat. The cutting machine is slidably installed on the cutting seat. A laterally moving screw rod arranged to rotate is installed on the cutting seat. A laterally moving block is threadedly connected to the laterally moving screw rod, and the laterally moving block is fixedly connected to the cutting machine.

5. A pipe fitting processing device according to claim 1, characterized in that, A cooling unit and a shaping unit are arranged between the forming unit and the cutting unit. The cooling unit is provided with a cooling water tank. The shaping unit is provided with several pairs of horizontal shaping wheels and several pairs of vertical shaping wheels. The horizontal shaping wheels clamp and shape the metal tube horizontally, and the vertical shaping wheels clamp and shape the metal tube vertically.

6. A pipe fitting processing device according to claim 1, characterized in that, A coil uncoiler and a conveyor are arranged behind the forming unit. The coil uncoiler loads a metal coil for processing the metal tube, and the metal coil is conveyed to the forming unit through the conveyor.

7. A pipe fitting processing device according to claim 1, characterized in that, A guiding mechanism is arranged on the forming unit. The guiding mechanism includes several upper guide wheels and several lower guide wheels, and the metal sheet is conveyed while being clamped between the upper guide wheels and the lower guide wheels.

8. A pipe fitting processing device according to any one of claims 1 to 7, characterized in that, A deburring mechanism is arranged on the forming unit. A scraper is installed on the deburring mechanism, and the scraper abuts against the weld seam of the metal tube.

9. A pipe fitting processing device according to claim 8, characterized in that, A primary cutting head and a secondary cutting head are arranged at the end of the scraper. The cutting edge of the secondary cutting head is higher than that of the primary cutting head. A chip guiding groove concave in an arc shape is arranged on the front side surfaces of the primary cutting head and the secondary cutting head, and the width of the chip guiding groove gradually increases from inside to outside.

10. A pipe fitting processing method, characterized in that When processing a metal tube with the pipe fitting processing device described in any one of claims 1 to 9, the following steps are included: S1, conveying a long strip-shaped metal sheet to the forming unit; S2, the forming unit bends and forms the metal sheet to form a metal tube; S3, the welding machine welds the opening of the metal tube; S4, the cutting machine cuts the metal tube; S5, the detection mechanism regularly detects the metal tube. During the detection, the cutting machine cuts grooves at intervals on the metal tube, the flattening disc moves downward to flatten the metal tube after the grooves are cut, and the shape of the weld seam is observed to judge the welding strength.

Images