Pvf spray coating line

Abstract

The application relates to the technical field of spray production lines, and discloses a PVF spray production line, a feeding seat and a discharging seat. The feeding seat is arranged at the left side of the discharging seat. The upper side of the discharging seat is provided with a flaw detection mechanism, a straightener No. 2 and a machining seat from left to right. A straightening straight wheel is movably arranged on the upper side of the straightener No. 2. The flaw detection mechanism is used for flaw detection operation on the metal pipe. The straightening straight wheel above the straightener No. 2 is used for straightening operation on the metal pipe. The PVF spray production line. The device uses an induction assembly to inductively detect the diameter of the metal pipe. On one hand, the device can avoid excessive cutting force from damaging the metal pipe. On the other hand, the device can effectively reduce the consumption of electric energy, thereby avoiding the waste of electric energy. Through the arrangement, the cutting force can be reasonably matched with the metal pipe of different sizes, so that the cutting effect on the metal pipe can be effectively improved, and the applicability of the device is further improved.

Description

Technical Field

[0001] This invention belongs to the technical field of spray coating production lines, and particularly relates to PVF spray coating production lines. Background Technology

[0002] PVF is a polymer compound formed by the reaction of polyvinyl alcohol and formaldehyde. It is a slightly straw-yellow solid with thermoplastic properties, a density of 1.2, a softening point of about 190℃, a heat distortion temperature of 65-75℃, and a water absorption rate of about 1%. It is soluble in acetone, chlorinated hydrocarbons, acetic acid, and phenols. It is mainly used to manufacture wear-resistant, high-strength enameled wire coatings and as an adhesive between metal, wood, rubber, and glass laminated plastics. It is also used as an intermediate layer in laminated plastics and to manufacture foam plastics with high impact strength and high compressive modulus.

[0003] Currently, PVF spraying production lines are used in the production of metal pipes. This high-performance-to-price ratio spraying technology has gained increasingly widespread application. However, due to the inherent characteristics of the spraying process, defective parts inevitably exist in the metal pipes during coating formation. These defective parts need to be cut off. Furthermore, existing production lines suffer from low automation, making it difficult to inspect the metal pipes during production. They also cannot provide appropriate cutting force based on the size of the metal pipes, thus affecting the cutting quality and efficiency, and consequently, the overall production quality. Therefore, existing equipment has these shortcomings and cannot meet the production needs of manufacturers, necessitating further improvements.

[0004] Therefore, in view of this, we will study and improve the existing structure and its shortcomings, and provide a PVF spraying production line in order to achieve a more practical purpose. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides a PVF spraying production line, which is achieved by the following specific technical means: The PVF spraying production line includes a feeding seat and an unloading seat. The feeding seat is located to the left of the unloading seat. From left to right, a flaw detection mechanism, a second straightener, and a processing seat are respectively arranged on the upper side of the unloading seat. A straightening roller is movably mounted on the upper side of the second straightener. The flaw detection mechanism performs flaw detection on the metal tube, and the straightening roller above the second straightener performs straightening on the metal tube. An electric telescopic device is fixedly mounted on the upper side of the processing seat. The bottom of the electric telescopic device is fixedly connected to a punching head via a telescopic rod passing through the processing seat. A punching seat is fixedly mounted directly below the punching head, and a punching groove is opened above the punching seat. Driving the electric telescopic device drives the punching head to cut the metal tube above the punching seat. A detection seat is fixedly installed on the upper surface of the processing seat and on the left side of the punching seat. A detection roller group is provided on the detection seat, which includes a detection roller one and a detection roller two. The front and rear ends of the detection roller one are movably connected to the inner wall of the detection seat. Movable grooves are opened on the front and rear sides of the detection seat, and movable sliders are slidably installed on the movable grooves. The front and rear ends of the detection roller two are movably connected to the movable sliders. Fixed frames are fixedly installed on both the front and rear sides of the detection seat. A sensing component is provided on the inner wall of the fixed frame. The sensing component is electrically connected to the electric telescopic device.

[0006] By adopting the above structure and using sensing components for detection, the waste of electrical energy can be avoided. Furthermore, this design allows for the appropriate adjustment of cutting force according to the size of metal tubes, thereby effectively improving the cutting effect on metal tubes and further enhancing the applicability of the device.

[0007] Furthermore, a fixing block is fixedly installed on the upper side of the movable slider, and a support spring is provided on the upper side of the fixing block. The upper end of the support spring is fixedly connected to the top wall of the movable groove of the detection seat.

[0008] By adopting the above structure, the movable slider slides on the sliding groove of the detection seat, and as the movable slider moves upward, it drives the fixed block to move upward synchronously, thus compressing the support spring.

[0009] Furthermore, the sensing component includes a mounting bracket, a sliding rheostat, a lever, and a connecting rod; One side of the fixed frame is fixedly connected to the inner wall of the fixed frame, and a sliding rheostat is fixedly installed on the other side of the fixed frame. A lever is slidably installed on the sliding rheostat, and the lever is fixedly connected to the fixed block by a connecting rod.

[0010] By adopting the above structure, the sliding distance of the lever is inversely proportional to the internal resistance of the sliding rheostat. Since the internal resistance of the sliding rheostat is inversely proportional to the current, the sliding distance is directly proportional to the current. Furthermore, the sliding rheostat and the electric expansion joint are electrically connected.

[0011] Furthermore, a traction frame is fixedly installed on the upper surface of the processing seat and on the left side of the detection seat. A traction wheel is movably installed on the traction frame, and the metal tube is pulled by the traction wheel.

[0012] By adopting the above structure, the metal tube is pulled by the traction wheel, thus achieving the traction of the metal tube.

[0013] Furthermore, a positioning seat is fixedly provided on the upper side of the feeding seat, and left and right positioning rollers and upper and lower positioning rollers are provided on the upper side of the positioning seat. The left and right positioning rollers are used to perform left and right positioning operations on the metal tube, and the upper and lower positioning rollers are used to perform up and down positioning operations on the metal tube.

[0014] By adopting the above structure, the metal tube to be coated is placed above the feed seat, and the metal tube passes through the left and right positioning rollers and the upper and lower positioning rollers. The left and right positioning rollers are used to achieve left and right positioning of the metal tube, and the upper and lower positioning rollers are used to achieve up and down positioning of the metal tube, thus achieving effective positioning of the metal tube in all directions.

[0015] Furthermore, a straightener is fixedly installed on the upper side of the feed seat, and the straightener is located on the right side of the positioning seat. A straightening wheel is movably installed on the upper side of the straightener, and the straightening wheel above the straightener performs the straightening operation on the metal tube.

[0016] By adopting the above structure, the metal tube is straightened by the straightening wheel above the straightener, thereby further improving the production quality of the metal tube.

[0017] Furthermore, a water tank, a water tank, and a straightening seat are fixedly installed on the upper side of the feeding seat. The straightening seat is located between the water tank and the water tank, and a rotary straightening mechanism is movably installed on the straightening seat. A fixed plate is fixedly installed inside the feed seat, and a drive motor is fixedly installed on the fixed plate. A transmission component is provided on the left side of the drive motor, and the drive motor is connected to the rotary straightening mechanism through the transmission component.

[0018] By adopting the above structure, the rotary straightening mechanism rotates continuously, thereby straightening the internal metal tube and further improving the straightening effect on the metal tube.

[0019] Furthermore, the transmission assembly includes a driving turntable, a driven turntable, and a transmission belt; The active turntable is fixedly connected to the output shaft of the drive motor, the driven turntable is fixedly connected to one end of the rotary straightening mechanism, and a transmission belt is provided between the active turntable and the driven turntable.

[0020] By adopting the above structure, the drive motor is driven by program control to generate kinetic energy and run. The output shaft of the drive motor drives the active turntable to rotate. As the active turntable rotates, the driven turntable is driven to rotate synchronously by the transmission belt. The driven turntable drives the rotary straightening mechanism to rotate continuously, thereby straightening the internal metal tube.

[0021] Furthermore, positioning components are provided on both the left and right sides of the punching head. The upper side of the positioning component is fixedly installed to the punching head via a mounting bracket. A positioning plate for positioning the metal tube is provided at the bottom of the positioning component. A shock-absorbing component is provided between the upper side of the positioning plate and the positioning component. The damping assembly includes a damping seat, a damping rod, a damping plate, and a damping spring. The upper side of the damping seat is fixedly connected to the inner wall of the positioning component. The damping rod is disposed on the lower side of the damping seat. The upper end of the damping rod extends into the interior of the damping seat and is fixedly connected to the damping plate. The damping spring is sleeved on the outer periphery of the damping seat and the damping rod. The damping seat is equipped with damping fluid, and the damping plate has through holes.

[0022] By adopting the above structure, the metal tube is fixed and positioned by the positioning plate, and the pushing force of the metal tube springing up drives the positioning plate to squeeze the shock-absorbing spring. The shock-absorbing spring can buffer and unload the force. This setting can further effectively buffer the impact force of the shock-absorbing plate and the positioning plate, thereby effectively preventing the cut end of the metal tube from springing outward, and further improving the punching effect and stability of the metal tube.

[0023] Furthermore, from left to right, the feeding seat and the unloading seat are respectively provided with a transfer box 1, an air box, an acid pickling box, a heating water box, a passivation box, a drying box, an electromagnetic turbine heater, a spraying box, a baking box, a cleaning box, and a transfer box 2; The metal tubes are fed and transported through the first and second transfer boxes. The metal tubes are preheated by the air box, chemically treated by the pickling box, washed and heated by the heated water box, passivated by the passivation box, heated and dried by the drying box, heated to 200 degrees Celsius by the electromagnetic turbine heater, coated by the spray box, baked and cured by the baking box, and cooled and cleaned by the cleaning box.

[0024] By adopting the above structure, automated operations can be achieved, effectively improving product production efficiency.

[0025] Beneficial effects Compared with the prior art, the present invention provides a PVF spraying production line, which has the following beneficial effects: 1. This PVF spraying production line uses a device that moves a detection roller based on the diameter of the metal tube. A sensing component detects the diameter, increasing the kinetic energy output of the electric telescopic device when the tube diameter is large, thus improving the cutting effect of the punching head. Conversely, decreasing the kinetic energy output when the tube diameter is small avoids excessive cutting force that could damage the tube and effectively reduces energy consumption. This design also allows for the appropriate adjustment of cutting force according to different tube sizes, further enhancing the cutting effect and improving the device's applicability.

[0026] 2. This PVF spraying production line uses a flaw detection mechanism to automatically inspect the surface of the metal pipe. When the flaw detection mechanism detects a defect on the surface of the metal pipe, it starts the electric telescopic device through program control. The telescopic rod at the bottom of the electric telescopic device pushes the punching head to move downward quickly to cut the metal pipe. This allows the metal pipe with defects to be cut off according to the dimensions, thereby improving the production quality of the metal pipe.

[0027] 3. This PVF spraying production line uses an air box to preheat and dry the metal tubes, an acid pickling box to chemically treat the surface of the metal tubes, a heated water tank to wash and heat the chemically treated metal tubes, a passivation box to passivate the metal tubes, a drying box to heat and dry the passivated metal tubes, a spraying box to spray the metal tubes with paint, a baking box to bake and cure the paint on the surface of the metal tubes, and a cleaning box to cool and clean the cured metal tubes with water. This automated operation effectively improves the production efficiency of the products.

[0028] 4. In this PVF spraying production line, the device uses a positioning plate to fix and position the metal tube securely. When the metal tube springs upward, the pushing force of the metal tube causes the positioning plate to squeeze the shock-absorbing spring. The shock-absorbing spring serves to buffer and unload the force. Furthermore, the shock-absorbing plate squeezes the damping fluid inside the shock-absorbing seat, causing the viscous resistance of the damping fluid to attenuate the kinetic energy of the moving machinery. This setting can further effectively buffer the impact force of the shock-absorbing plate and the positioning plate, thereby effectively preventing the cut end of the metal tube from springing outward, and further improving the punching effect and stability of the metal tube. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the unloading seat of the present invention; Figure 3 This is a schematic diagram of the installation structure of the processing base and the electric telescopic device of the present invention; Figure 4 This is a schematic diagram of the installation structure of the detection seat and detection roller assembly of the present invention; Figure 5 This is a schematic diagram of the installation structure of the detection seat and sensing component of the present invention; Figure 6 This is a schematic diagram of the sensing component structure of the present invention; Figure 7 This is a schematic diagram of the overall structure of the feed seat of the present invention; Figure 8 This is a schematic diagram of the mounting structure of the feed seat and drive motor of the present invention; Figure 9 This is a schematic diagram of the installation structure of the drive motor and transmission components of the present invention; Figure 10 This is a schematic diagram of the installation structure of the positioning component and the positioning plate of the present invention; Figure 11 This is a schematic diagram of the installation structure of the positioning plate and shock absorption components of the present invention; Figure 12 This is a schematic diagram of the shock absorption component structure of the present invention.

[0031] In the diagram: 1. Feeding seat; 2. Unloading seat; 3. Flaw detection mechanism; 4. Straightener II; 5. Processing seat; 6. Electric telescopic device; 61. Punching head; 7. Punching seat; 8. Detection seat; 9. Detection roller group; 91. Detection roller I; 92. Detection roller II; 10. Movable slider; 11. Fixed block; 12. Support spring; 13. Fixed frame; 14. Sensing component; 141. Fixed frame; 142. Sliding rheostat; 143. Paddle; 144. Connecting rod; 15. Traction frame; 151. Traction wheel; 16. Positioning seat; 161. Left and right positioning rollers; 162. Upper and lower positioning rollers; 17. Straightener I; 18. Water tank I; 19. Water tank II; 20. Straightening seat; 201. Rotary straightening mechanism; 21. Fixing plate; 22. Drive motor; 23. Transmission assembly; 231. Driving turntable; 232. Driven turntable; 233. Transmission belt; 24. Transmission box one; 25. Air box; 26. Pickling box; 27. Heating water tank; 28. Passivation box; 29. ​​Drying box; 30. Electromagnetic turbine heater; 31. Spraying box; 32. Baking box; 33. Cleaning box; 34. Transmission box two; 35. Positioning component; 351. Mounting bracket; 36. Positioning plate; 37. Vibration damping assembly; 371. Vibration damping seat; 372. Vibration damping rod; 373. Vibration damping plate; 3731. Through hole; 374. Vibration damping spring. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present invention can be combined with each other. For the convenience of description, the words "upper", "lower", "left", and "right" appearing below only indicate that they are consistent with the upper, lower, left, and right directions of the accompanying drawings themselves, and do not limit the structure. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see Figures 1 to 4The PVF coating production line includes a feed seat 1 and a discharge seat 2. The feed seat 1 is located to the left of the discharge seat 2. From left to right, the upper side of the discharge seat 2 is equipped with a flaw detection mechanism 3, a straightener 4, and a processing seat 5. A straightening roller is movably mounted on the upper side of the straightener 4. The flaw detection mechanism 3 performs flaw detection on the metal tube, and the straightening roller above the straightener 4 straightens the metal tube. An electric telescopic device 6 is fixedly mounted on the upper side of the processing seat 5. The bottom of the electric telescopic device 6 is connected to a punching head 61 via a telescopic rod passing through the processing seat 5. A punching seat 7 is fixedly mounted directly below the punching head 61, and a punching groove is formed on the upper part of the punching seat 7. Driving the electric telescopic device 6 drives the punching head 61 to cut the metal tube above the punching seat 7. A processing seat 5 is fixedly mounted on the upper surface of the processing seat 5, located to the left of the punching seat 7. The detection base 8 is equipped with a detection roller group 9, which includes a first detection roller 91 and a second detection roller 92. The front and rear ends of the first detection roller 91 are movably connected to the inner wall of the detection base 8. Movable grooves are opened on the front and rear sides of the detection base 8, and movable sliders 10 are slidably installed on the movable grooves. The front and rear ends of the second detection roller 92 are movably connected to the movable sliders 10. Fixed frames 13 are fixedly installed on both the front and rear sides of the detection base 8. A sensing component 14 is provided on the inner wall of the fixed frame 13. The sensing component 14 is electrically connected to the electric telescopic device 6. The sensing component 14 is used to detect the metal tube, thereby avoiding the waste of electrical energy. This setting allows the cutting force to be reasonably adapted according to the metal tube of different sizes, thereby effectively improving the cutting effect of the metal tube and further enhancing the applicability of the device.

[0034] Please see Figures 4 to 5 A fixing block 11 is fixedly installed on the upper side of the movable slider 10, and a support spring 12 is provided on the upper side of the fixing block 11. The upper end of the support spring 12 is fixedly connected to the top wall of the movable groove of the detection seat 8. The movable slider 10 slides on the sliding groove of the detection seat 8, and the movable slider 10 moves upward, driving the fixing block 11 to move upward synchronously and pressing the support spring 12.

[0035] Please see Figure 6 The sensing component 14 includes a fixed frame 141, a sliding rheostat 142, a lever 143, and a connecting rod 144. One side of the fixed frame 141 is fixedly connected to the inner wall of the fixed frame 13, and the sliding rheostat 142 is fixedly installed on the other side of the fixed frame 141. The lever 143 is slidably installed on the sliding rheostat 142, and the lever 143 is fixedly connected to the fixed block 11 through the connecting rod 144. By setting the sliding distance of the lever 143 to be inversely proportional to the internal resistance of the sliding rheostat 142, since the internal resistance of the sliding rheostat 142 is inversely proportional to the current, the sliding distance is directly proportional to the current. Furthermore, the sliding rheostat 142 is electrically connected to the electric telescopic device 6.

[0036] Please see Figure 3 A traction frame 15 is fixedly installed on the upper surface of the processing seat 5 and on the left side of the detection seat 8. A traction wheel 151 is movably installed on the traction frame 15. The traction wheel 151 is used to pull the metal pipe. The traction wheel 151 is used to pull the metal pipe to achieve the traction of the metal pipe.

[0037] Please see Figure 1 From left to right, between the feeding seat 1 and the unloading seat 2, there are a first transfer box 24, a wind box 25, an acid pickling box 26, a heating water box 27, a passivation box 28, a drying box 29, an electromagnetic turbine heater 30, a spraying box 31, a baking box 32, a cleaning box 33, and a second transfer box 34. The metal tubes are fed and transported through the first transfer box 24 and the second transfer box 34. The metal tubes are preheated through the wind box 25. The surface of the metal tubes is chemically treated through the acid pickling box 26. The chemically treated metal tubes are washed and heated through the heating water box 27. The metal tubes are passivated through the passivation box 28. The passivated metal tubes are heated and dried through the drying box 29. The electromagnetic turbine heater 30 heats the metal tubes to a high temperature of 200 degrees Celsius. The metal tubes are coated through the spraying box 31. The coating on the surface of the metal tubes is baked and cured through the baking box 32. The cured metal tubes are cooled and cleaned through the cleaning box 33. This achieves automated operation and effectively improves the production efficiency of the products.

[0038] Please see Figure 7 A positioning seat 16 is fixedly installed on the upper side of the feeding seat 1. The upper side of the positioning seat 16 is provided with left and right positioning rollers 161 and upper and lower positioning rollers 162. The left and right positioning rollers 161 are used to perform left and right positioning operations on the metal tube, and the upper and lower positioning rollers 162 are used to perform up and down positioning operations on the metal tube. By placing the metal tube to be sprayed above the feeding seat 1, the metal tube passes through the left and right positioning rollers 161 and the upper and lower positioning rollers 162. The left and right positioning rollers 161 are used to achieve left and right positioning of the metal tube, and the upper and lower positioning rollers 162 are used to achieve up and down positioning of the metal tube, thus achieving effective positioning of the metal tube in all directions.

[0039] Please see Figure 7 A straightener 17 is fixedly installed on the upper side of the feed seat 1, and the straightener 17 is located on the right side of the positioning seat 16. A straightening wheel is movably installed on the upper side of the straightener 17. The straightening wheel above the straightener 17 is used to straighten the metal tube. The straightening wheel above the straightener 17 is used to straighten the metal tube, thereby improving the production quality of the metal tube.

[0040] Please see Figures 7 to 8The upper side of the feeding seat 1 is fixedly provided with a water tank 18, a water tank 29 and a straightening seat 20. The straightening seat 20 is located between the water tank 18 and the water tank 29. A rotary straightening mechanism 201 is movably provided on the straightening seat 20. A fixing plate 21 is fixedly installed inside the feeding seat 1. A drive motor 22 is fixedly installed on the fixing plate 21. A transmission component 23 is provided on the left side of the drive motor 22. The drive motor 22 is connected to the rotary straightening mechanism 201 through the transmission component 23. The rotary straightening mechanism 201 rotates continuously, thereby straightening the internal metal tube and further improving the straightening effect of the metal tube.

[0041] Please see Figures 8 to 9 The transmission assembly 23 includes a driving turntable 231, a driven turntable 232, and a transmission belt 233. The driving turntable 231 is fixedly connected to the output shaft of the drive motor 22, and the driven turntable 232 is fixedly connected to one end of the rotary straightening mechanism 201. The transmission belt 233 is provided between the driving turntable 231 and the driven turntable 232. The drive motor 22 generates kinetic energy to run under the control of the program. The output shaft of the drive motor 22 drives the driving turntable 231 to rotate. As the driving turntable 231 rotates, the transmission belt 233 drives the driven turntable 232 to rotate synchronously. The driven turntable 232 drives the rotary straightening mechanism 201 to rotate continuously, thereby straightening the internal metal tube.

[0042] Please see Figures 10 to 12Positioning components 35 are provided on both the left and right sides of the punching head 61. The upper side of the positioning component 35 is fixedly installed to the punching head 61 via a mounting bracket 351. A positioning plate 36 for positioning the metal tube is provided at the bottom of the positioning component 35. A shock-absorbing assembly 37 is provided between the upper side of the positioning plate 36 and the positioning component 35. The shock-absorbing assembly 37 includes a shock-absorbing seat 371, a shock-absorbing rod 372, a shock-absorbing plate 373, and a shock-absorbing spring 374. The upper side of the shock-absorbing seat 371 is fixedly connected to the inner wall of the positioning component 35. The shock-absorbing rod 372 is provided on the lower side of the shock-absorbing seat 371. The upper end of the shock-absorbing rod 372 extends into the interior of the shock-absorbing seat 371 and is fixedly connected to the shock-absorbing plate 373. The shock-absorbing spring 374 is sleeved on the outer periphery of the shock-absorbing seat 371 and the shock-absorbing rod 372. The internal structure contains damping fluid, and the damping plate 373 has a through hole 3731. The metal tube is fixed and positioned by the positioning plate 36. When the metal tube bounces upward, the pushing force of the bounced metal tube drives the positioning plate 36 to squeeze the damping spring 374. The damping spring 374 can buffer and unload the force. The damping rod 372 simultaneously pushes the damping plate 373 to move inside the damping seat 371. The damping plate 373 squeezes the damping fluid inside the damping seat 371. At the same time, the viscous resistance of the damping fluid causes the kinetic energy of the moving machine to decrease. This setting can further effectively buffer the impact force of the damping plate 373 and the positioning plate 36, thereby effectively preventing the cut end of the metal tube from bouncing outward, and further improving the punching effect and stability of the metal tube.

[0043] The specific usage and function of this embodiment are as follows: Working Principle: The PVF coating production line is used in the production of metal pipes. During operation, the metal pipe to be coated is placed above the feed seat 1, passing through the left and right positioning rollers 161 and the upper and lower positioning rollers 162. The left and right positioning rollers 161 provide left-right positioning, while the upper and lower positioning rollers 162 provide up-down positioning. The pipe is then straightened by straightening wheels above the straightener 17. Simultaneously, the pipe passes through the water tank 18 into the rotary straightening mechanism 201, where it is water-cooled. The drive motor 22, controlled by a program, generates kinetic energy, and its output shaft drives the active turntable 231 to rotate. As the active turntable 231 rotates, the drive belt 233 drives the driven turntable 232 to rotate synchronously, which in turn drives the rotary straightening mechanism 201 to rotate continuously. This allows for the straightening of internal metal tubes. The straightened metal tubes then pass through water tank 219 into transfer tank 24. Water tank 219 cleans and cools the straightened metal tubes, while transfer tank 24 transports them. Simultaneously, air box 25 preheats and dries the metal tubes. Pickling tank 26 chemically treats the surface of the metal tubes. Heating water tank 27 washes and heats the chemically treated metal tubes. Passivation tank 28 passivates the metal tubes. Drying tank 29 heats and dries the passivated metal tubes. Electromagnetic turbine heater 30 heats the metal tubes to 200 degrees Celsius. Coating is then applied to the metal tubes through spraying tank 31. After spraying, baking tank 32 bakes and cures the coating on the surface of the metal tubes. Finally, cleaning tank 33 cools and cleans the cured metal tubes with water, achieving automated operation and effectively improving product production efficiency. At this point, the metal tube passes through the flaw detection mechanism 3, where the surface of the metal tube is automatically inspected. As the metal tube passes through the flaw detection mechanism 3, it enters the straightener 4, where the straightening rollers above the straightener 4 further straighten the metal tube. The straightened metal tube then passes through the inspection roller group 9 and the processing seat 5 to be transferred to the next process. When the flaw detection mechanism 3 detects a defect on the surface of the metal tube, the electric telescopic device 6 is activated by the program control. The telescopic rod at the bottom of the electric telescopic device 6 pushes the punching head 61 to move downward quickly, thus cutting the metal tube. This allows the metal tube with defects to be cut off according to the dimensions, thereby improving the production quality of the metal tube. Furthermore, during the process of the metal tube passing through the detection roller group 9, the diameter of the metal tube will push the detection roller 92 upward. As the detection roller 92 moves upward, it simultaneously drives the movable slider 10 to slide upward, causing the movable slider 10 to slide on the sliding groove of the detection seat 8. During the upward movement of the movable slider 10, the fixed block 11 moves upward synchronously, compressing the support spring 12. Simultaneously, the connecting rod 144 drives the lever 143 to slide on the sliding rheostat 142. This device sets the sliding distance of the lever 143 inversely proportional to the internal resistance of the sliding rheostat 142. Since the internal resistance of the sliding rheostat 142 is proportional to the current... The sliding distance is directly proportional to the current, and the sliding rheostat 142 and the electric expansion joint 6 are electrically connected. When the diameter of the metal tube is large, the sliding distance of the lever 143 on the sliding rheostat 142 is longer, which causes the kinetic energy output of the electric expansion joint 6 to increase simultaneously, thus improving the punching effect of the punching head 61 on the metal tube. When the diameter of the metal tube is small, the sliding distance of the lever 143 on the sliding rheostat 142 is shorter, which causes the kinetic energy output of the electric expansion joint 6 to decrease simultaneously. On the one hand, this can avoid damage to the metal tube caused by excessive punching force, and on the other hand, it can effectively reduce the consumption of electrical energy, thereby achieving the effect of avoiding the waste of electrical energy. Furthermore, during the punching process of the punching head 61, as the punching head 61 moves downward, it will drive the positioning component 35 to move downward synchronously. Before the punching head 61 contacts the metal tube, the positioning plate 36 will contact the metal tube first, using the positioning plate 36 to fix and position the metal tube securely. After the punching head 61 finishes punching the metal tube, the metal tube has an uncontrollable tendency to bounce upward. When the metal tube bounces upward, the pushing force of the metal tube's bounce will cause the positioning plate 36 to compress the shock-absorbing spring 374. The shock-absorbing spring 374 can play a role in damping the impact. The purpose of this is to reduce the impact force and to simultaneously push the damping plate 373 within the damping seat 371 using the damping rod 372. The damping plate 373 compresses the damping fluid inside the damping seat 371, causing the damping fluid to flow through the through holes 3731 on the damping plate 373. At the same time, the viscous resistance of the damping fluid causes the kinetic energy of the moving machinery to decrease. This design can further effectively buffer the impact force of the damping plate 373 and the positioning plate 36, thereby effectively preventing the cut end of the metal tube from bouncing outward, and further improving the punching effect and stability of the metal tube.

[0044] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0045] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A PVF spraying production line, comprising a feed station (1) and a discharge station (2), characterized in that: The feeding seat (1) is located on the left side of the unloading seat (2). The upper side of the unloading seat (2) is provided with a flaw detection mechanism (3), a straightener (4) and a processing seat (5) from left to right. A straightening wheel is movably provided on the upper side of the straightener (4). The flaw detection mechanism (3) performs flaw detection on the metal tube, and the straightening wheel above the straightener (4) performs straightening on the metal tube. An electric telescopic device (6) is fixedly provided on the upper side of the processing seat (5). The bottom of the electric telescopic device (6) is fixedly connected to the punching head (61) by a telescopic rod passing through the processing seat (5). A punching seat (7) is provided directly below the punching head (61), and a punching groove is provided above the punching seat (7). The electric telescopic device (6) drives the punching head (61) to cut the metal tube above the punching seat (7). A detection seat (8) is fixedly installed on the upper surface of the processing seat (5) and on the left side of the punching seat (7). A detection roller group (9) is provided on the detection seat (8). The detection roller group (9) includes a first detection roller (91) and a second detection roller (92). The front and rear ends of the first detection roller (91) are movably connected to the inner wall of the detection seat (8). Movable grooves are opened on the front and rear sides of the detection seat (8), and movable sliders (10) are slidably installed on the movable grooves. The front and rear ends of the second detection roller (92) are movably connected to the movable sliders (10). Fixed frames (13) are fixedly installed on both the front and rear sides of the detection seat (8). A sensing component (14) is provided on the inner wall of the fixed frame (13). The sensing component (14) is electrically connected to the electric telescopic device (6). A fixing block (11) is fixedly installed on the upper side of the movable slider (10), and a support spring (12) is provided on the upper side of the fixing block (11). The upper end of the support spring (12) is fixedly connected to the top wall of the movable groove of the detection seat (8). The sensing component (14) includes a fixed frame (141), a sliding rheostat (142), a lever (143), and a connecting rod (144). One side of the fixed frame (141) is fixedly connected to the inner wall of the fixed frame (13), and a sliding rheostat (142) is fixedly installed on the other side of the fixed frame (141). A lever (143) is slidably installed on the sliding rheostat (142), and the lever (143) is fixedly connected to the fixed block (11) through a connecting rod (144).

2. The PVF spraying production line according to claim 1, characterized in that: A traction frame (15) is fixedly installed on the upper surface of the processing seat (5) and on the left side of the detection seat (8). A traction wheel (151) is movably installed on the traction frame (15) to traction the metal pipe.

3. The PVF spraying production line according to claim 1, characterized in that: A positioning seat (16) is fixedly provided on the upper side of the feed seat (1). A left and right positioning roller (161) and an upper and lower positioning roller (162) are provided on the upper side of the positioning seat (16). The left and right positioning roller (161) is used to perform left and right positioning operations on the metal tube, and the upper and lower positioning roller (162) is used to perform upper and lower positioning operations on the metal tube.

4. The PVF spraying production line according to claim 3, characterized in that: A straightener (17) is fixedly installed on the upper side of the feed seat (1), and the straightener (17) is located on the right side of the positioning seat (16). A straightening wheel is movably installed on the upper side of the straightener (17), and the straightening wheel above the straightener (17) is used to straighten the metal tube.

5. The PVF spraying production line according to claim 1, characterized in that: Water tank 1 (18), water tank 2 (19) and straightening seat (20) are fixedly provided on the upper side of the feed seat (1). The straightening seat (20) is located between water tank 1 (18) and water tank 2 (19). A rotary straightening mechanism (201) is movably provided on the straightening seat (20). A fixed plate (21) is fixedly installed inside the feed seat (1). A drive motor (22) is fixedly installed on the fixed plate (21). A transmission assembly (23) is provided on the left side of the drive motor (22). The drive motor (22) is connected to the rotary straightening mechanism (201) through the transmission assembly (23).

6. The PVF spraying production line according to claim 5, characterized in that: The transmission assembly (23) includes a driving turntable (231), a driven turntable (232), and a transmission belt (233). The active turntable (231) is fixedly connected to the output shaft of the drive motor (22), the driven turntable (232) is fixedly connected to one end of the rotary straightening mechanism (201), and a transmission belt (233) is provided between the active turntable (231) and the driven turntable (232).

7. The PVF spraying production line according to claim 1, characterized in that: Positioning components (35) are provided on both the left and right sides of the punching head (61). The upper side of the positioning component (35) is fixedly installed to the punching head (61) through the mounting bracket (351). The bottom of the positioning component (35) is provided with a positioning plate (36) for positioning the metal tube. A shock-absorbing component (37) is provided between the upper side of the positioning plate (36) and the positioning component (35). The damping assembly (37) includes a damping seat (371), a damping rod (372), a damping plate (373), and a damping spring (374). The upper side of the damping seat (371) is fixedly connected to the inner wall of the positioning component (35). The damping rod (372) is disposed on the lower side of the damping seat (371). The upper end of the damping rod (372) extends into the interior of the damping seat (371) and is fixedly connected to the damping plate (373). The damping spring (374) is sleeved on the outer periphery of the damping seat (371) and the damping rod (372). The damping seat (371) is provided with damping fluid inside, and the damping plate (373) is provided with through holes (3731).

8. The PVF spraying production line according to claim 1, characterized in that: The feed seat (1) and the unloading seat (2) are respectively provided from left to right as follows: transfer box 1 (24), air box (25), pickling box (26), heating water box (27), passivation box (28), drying box (29), electromagnetic turbine heater (30), spray box (31), baking box (32), cleaning box (33), and transfer box 2 (34). The metal tube is fed and transported through the first transfer box (24) and the second transfer box (34). The metal tube is preheated through the air box (25). The surface of the metal tube is chemically treated through the pickling box (26). The chemically treated metal tube is washed and heated through the heating water box (27). The metal tube is passivated through the passivation box (28). The passivated metal tube is heated and dried through the drying box (29). The metal tube is heated to 200 degrees Celsius through the electromagnetic turbine heater (30). The metal tube is coated with paint through the spraying box (31). The coating on the surface of the metal tube is baked and cured through the baking box (32). The cured metal tube is cooled and cleaned through the cleaning box (33).

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