Quenching device and machining process for high-performance steel fastener for wind power

Abstract

The device comprises a machining table, an electromagnetic induction heating ring is used for carrying out heat treatment on a rotating screw, a water spraying pipe is arranged on one side of the electromagnetic induction heating ring, and a water outlet pipe is arranged on the other side of the electromagnetic induction heating ring. The electromagnetic induction heating ring moves downwards to spray water to quench the heat-treated screw; the process comprises the following steps: S1, initial preparation and feeding; S2, quenching treatment; S3, quenching cooling; S4, tempering treatment; quenching and tempering are integrated, the process continuity is good, a screw is driven by a motor to rotate in the heat treatment process, uniform heating, complete austenitizing and higher hardness after quenching are guaranteed, the screw still keeps rotating during cooling, uniform cooling is achieved, the quenching quality is guaranteed, tempering treatment can be conducted on the cooled screw, internal stress is eliminated, and the service life of the screw is prolonged. Deformation and cracking are prevented, and the screw quality is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of screw quenching, and particularly relates to a quenching device and processing technology for high-performance steel fasteners used in wind power. Background Art

[0002] As a key component for connecting core components such as wind turbine towers, blades, hubs, and bearings, wind power fasteners, such as carbon steel bolts, need to ensure reliability under extreme environments, high dynamic loads, and long service life cycles; to ensure the strength of the fasteners, quenching is crucial for them.

[0003] The quenching process is widely used in modern mechanical manufacturing industries, especially almost all workpieces for finishing are quenched. As a quenching device, a high-frequency quenching machine uses high-frequency current (30K - 1000KHZ) to locally heat and cool the surface of the workpiece to obtain a surface hardened layer. The high-frequency quenching machine is more energy-saving, efficient, and environmentally friendly than traditional quenching machines. High-frequency quenching only performs local heat treatment on the workpiece to strengthen the surface of the workpiece, while the internal properties basically remain the same as before heat treatment. Therefore, workpieces after high-frequency quenching can have high strength, high wear resistance, and high toughness, and can significantly reduce quenching deformation and energy consumption.

[0004] An existing fully automatic high-frequency screw quenching machine with the publication number of CN117089672A in the prior art heats the screws through an electromagnetic induction heating coil for heat treatment. However, the screws remain stationary, which will cause uneven heating of the screws, incomplete austenitization, and some areas not reaching the critical temperature, resulting in insufficient hardness after quenching; at the same time, when quenching the screws with cold water, the screws will have volume changes due to thermal expansion and contraction and phase changes (such as austenite → martensite). If the cooling is uneven, the contraction speeds of different parts of the screws are different, resulting in uneven hardness of the screws and thus reducing their quality. For this reason, the present application proposes a quenching device and processing technology for high-performance steel fasteners used in wind power. Summary of the Invention

[0005] The purpose of the present invention is to solve the above technical problems and propose a quenching device and processing technology for high-performance steel fasteners used in wind power.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions: A quenching device for high-performance steel fasteners used in wind power, including a processing table. A feeding track is provided on one side of the processing table. A rotating rod is rotated on the upper end of the processing table. A circular plate is fixed at the upper end of the rotating rod. A plurality of material grooves cooperating with the feeding track are provided on the circular plate. Screws are fed into the material grooves through the feeding track. Quenching mechanism for screw quenching. The quenching mechanism includes a driving block that can be lifted and lowered and has a hexagonal groove at the bottom. The driving block moves down to cover the upper end of the screw without applying downward pressure to the screw. After the driving block covers the outside of the screw, it can drive the screw to rotate. A side of the circular plate is provided with an electromagnetic induction heating coil that can be lifted and lowered simultaneously with the driving block. The electromagnetic induction heating coil performs heat treatment on the rotating screw. A water spray pipe is provided on one side of the electromagnetic induction heating coil. When the electromagnetic induction heating coil moves down, it can spray water on the heat-treated screw for quenching. When the driving block and the electromagnetic induction heating coil move again, tempering treatment can be performed on the screw. When the electromagnetic induction heating coil and the water spray pipe move down, the water spray pipe stops spraying water.

[0007] Preferably, it further includes a power mechanism for driving the circular plate to rotate. The power mechanism includes a transmission box and a gearbox fixed to the upper end of the processing table. A motor is installed on the gearbox. The output end of the motor is fixedly connected to one shaft end of the gearbox. Another shaft end of the gearbox is fixed with a transmission shaft. A first bevel gear is fixed on the transmission shaft. The first bevel gear is an incomplete gear. A worm and a worm gear that are meshed are rotated in the transmission box. A short shaft is fixed on the worm. A second bevel gear that meshes with the first bevel gear is fixed on the short shaft. The rotating rod is coaxially and fixedly connected with the worm gear.

[0008] Preferably, a bracket is fixedly installed on the upper end of the processing table. A first piston cylinder is installed at the bottom of the bracket. A first moving piston and a sliding ring are slidably connected in the first piston cylinder. A first spring is fixed on the first moving piston and the sliding ring. A screw rod is fixed to the bottom of the first moving piston. A sleeve that is sleeved outside the screw rod and is cooperatively connected is rotatably installed in the sliding ring. The driving block is fixed to the bottom of the sleeve. A limiting block for limiting the sliding ring is fixed to the inner wall of the first piston cylinder.

[0009] Preferably, a second piston cylinder is fixed to the upper end of the processing table. A second moving piston is slidably connected in the second piston cylinder. A second spring is fixed on the second moving piston and the second piston cylinder. An upper end of the second moving piston is fixed with a driving rod. An upper end of the driving rod is fixed with a lifting block. A limiting frame is fixed on the lifting block. The electromagnetic induction heating coil is installed on the limiting frame.

[0010] Preferably, a third piston cylinder is fixed to the upper end of the processing table. A third moving piston is slidably connected in the third piston cylinder. A lifting pipe is fixedly penetrated through the third moving piston. The lifting pipe is fixedly connected to the bottom of the lifting block. The water spray pipe is connected to the lifting pipe, and a first solenoid valve is installed on the water spray pipe. A water tank is placed on the processing table. The water tank is connected to the third piston cylinder through a water inlet pipe, and a second solenoid valve is installed on the water inlet pipe.

[0011] Preferably, it further includes an oil pumping mechanism for delivering hydraulic oil into the first piston cylinder and the second piston cylinder. The oil pumping mechanism includes a circular block fixed on the transmission shaft. A fourth piston cylinder is fixed on the processing table. A fourth moving piston is slidably connected in the fourth piston cylinder. A connecting rod is hinged to the fourth moving piston. The connecting rod is eccentrically connected to the circular block. A delivery pipe is installed on the fourth piston cylinder. The first piston cylinder and the second piston cylinder are connected through a U-shaped pipe. The delivery pipe is connected to the U-shaped pipe.

[0012] Preferably, it further includes a guiding mechanism. The guiding mechanism includes a guide rail fixed on the bracket. A guiding groove is provided on the lifting block. The lifting block is buckled outside the guide rail through the guiding groove and is slidably arranged.

[0013] Preferably, part of the limiting frame is located above the electromagnetic induction heating coil, and the limiting frame will not contact the screw.

[0014] Preferably, the spring constant of the first spring is less than that of the second spring.

[0015] The present invention also discloses a high-precision screw energy-saving quenching process, including the following steps: S1. Initial preparation and feeding: Screws are successively delivered into the material trough. The motor works, and drives the transmission shaft to rotate slowly through the transmission of the gearbox. The first bevel gear rotates: The rotation of the transmission shaft drives the first bevel gear to rotate. When the first bevel gear does not mesh with the second bevel gear, the screw is directly opposite to the driving block. Due to the setting of the worm and the worm gear, the rotating rod is locked and cannot rotate, ensuring the stability of the circular plate. At this time, the material trough is directly opposite to the feeding track, and the feeding is completed; S2. Quenching treatment: The rotation of the transmission shaft drives the circular block to rotate. Through the transmission of the connecting rod, the fourth moving piston moves in the fourth piston cylinder. The hydraulic oil in the fourth piston cylinder is delivered into the first piston cylinder and the second piston cylinder through the delivery pipe and the U-shaped pipe. Since the spring constant of the first spring is less than that of the second spring, the hydraulic oil in the first piston cylinder increases, driving the first moving piston to move, squeezing the first spring, the sliding ring, the sleeve and the driving block to move downward. The sliding ring abuts against the limiting block. The driving block is sleeved outside the screw and does not generate a downward pressure. The hydraulic oil continues to be delivered into the first piston cylinder. The first moving piston moves to squeeze the first spring, driving the screw rod to move in the sleeve, and then driving the sleeve to rotate. The rotation of the sleeve drives the driving block and the screw to rotate. The hydraulic oil in the second piston cylinder increases, driving the second moving piston to move upward, driving the driving rod and the lifting block to move upward. The upward movement of the lifting block drives the limiting frame and the electromagnetic induction heating coil to move upward to perform heat treatment on the rotating screw. The upward movement of the lifting block drives the lifting pipe and the third moving piston to move upward. The first solenoid valve is closed, and the second solenoid valve is opened. The water in the water tank is sucked into the third piston cylinder through the water inlet pipe.

[0016] S3. Quenching and cooling: The drive shaft drives the connecting rod and the fourth moving piston to move back, and each part gradually returns to its original position. At this time, the first solenoid valve opens and the second solenoid valve closes. The electromagnetic induction heating coil moves down to continue heat treatment of the screw. The third moving piston moves down: The lifting block moves down to drive the lifting pipe and the third moving piston to move down, squeezing the internal cooling water, which is sprayed out through the water spray pipe to quickly cool down the heated screw. The sleeve rotates in reverse: The screw rod follows the first moving piston to move up and return to its original position, and the sleeve rotates in reverse, driving the driving block and the screw to rotate in reverse. By positive and reverse rotation, it ensures that the screw is evenly heated and cooled, guaranteeing the quenching quality and hardness.

[0017] S4. Tempering treatment: The motor rotates in reverse, and the electromagnetic induction heating coil moves up to perform tempering treatment on the cooled screw to eliminate internal stress and prevent deformation and cracking. Tempering principle: During the quenching process of the screw, the cooling speeds of the surface and the core are different, resulting in residual tensile stress inside. If the stress exceeds the material strength limit, the screw may deform or even crack. The tempering treatment ensures the quality of the screw after heat treatment. Since the first solenoid valve is open and the second solenoid valve is closed, the third moving piston moves up and down, only reciprocatingly conveying the water in the water tank and not spraying it out through the water spray pipe.

[0018] S5. Completion of treatment and reset: After the motor rotates in reverse to complete the tempering treatment, the motor rotates forward again to drive all parts to completely return to their original positions. The first bevel gear meshes with the second bevel gear: The first bevel gear meshes with the second bevel gear again to drive the short shaft and the worm to rotate. The rotation of the worm drives the worm wheel to rotate. The rotation of the worm wheel drives the rotating rod and the circular plate to rotate, making another screw face the driving block. The first bevel gear and the second bevel gear no longer mesh, and the above-mentioned quenching and tempering treatment processes for the screw are repeated.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The rotation of the drive shaft drives the circular block to rotate. Under the transmission of the connecting rod, the fourth moving piston moves in the fourth piston cylinder. The fourth moving piston moves away from the circular block. In this way, the hydraulic oil in the fourth piston cylinder can be transported to the first piston cylinder and the second piston cylinder through the delivery pipe and the U-shaped pipe. Since the spring constant of the first spring is less than the spring constant of the second spring, the increase in hydraulic oil in the first piston cylinder drives the first moving piston to move. The first moving piston moves to squeeze the first spring, the sliding ring, the sleeve, and the driving block down. Finally, the sliding ring abuts against the limiting block. At this time, the driving block is sleeved outside the screw and does not exert a downward pressure on the screw. In this way, the screw will not generate pressure with the circular plate, resulting in an increase in friction when it rotates.

[0020] 2. Since the sliding ring cannot move down, the continuous transportation of hydraulic oil in the first piston cylinder will cause the first moving piston to move and squeeze the first spring. The movement of the first moving piston drives the screw rod to move in the sleeve, thereby driving the sleeve to rotate. The rotation of the sleeve drives the driving block and the screw to rotate for subsequent heat treatment.

[0021] 3. When the first moving piston moves to drive the screw rod to move inside the sleeve, at this time, the hydraulic oil in the second piston cylinder increases to drive the second moving piston to move upward. The upward movement of the second moving piston drives the driving rod and the lifting block to move upward. The upward movement of the lifting block drives the limiting frame and the electromagnetic induction heating coil to move upward. The upward movement of the electromagnetic induction heating coil performs heat treatment on the rotating screw, so that the screw can be heated evenly and its heat reception is ensured to be uniform.

[0022] 4. The electromagnetic induction heating coil moves downward to continue heat treatment on the screw. The downward movement of the lifting block drives the lifting pipe and the third moving piston to move downward. The downward movement of the third moving piston squeezes the internal cooling water, and the cooling water is sprayed out through the spray pipe and sprayed onto the heated screw. In this way, the heated screw can be quickly cooled down. The screw rod follows the upward movement of the first moving piston to reset. In this way, the sleeve is reversed, and the sleeve drives the driving block and the screw to reverse. In this way, the heat treatment effect on the screw is better through forward and reverse rotation, and the heat reception is more uniform. When cooling, the screw is still in a rotating state, so that uniform cooling can be achieved, and its cooling is uniform, thus ensuring the quality of quenching and ensuring the hardness of the screw.

[0023] 5. It can realize the upward movement of the electromagnetic induction heating coil, which is the same as the heat treatment of the screw as described above. In this way, tempering treatment can be performed on the cooled screw to eliminate internal stress and prevent deformation and cracking. The reason is that during the quenching (rapid cooling) process of the screw, the cooling speeds of the surface and the core are different, resulting in residual tensile stress inside. If the stress exceeds the material strength limit, the screw may be deformed or even cracked. In this way, the quality of the screw after heat treatment can be ensured.

[0024] In summary, the present invention integrates quenching and tempering and has good process continuity. The screw rotates during the heat treatment process driven by the motor to ensure uniform heat reception, complete austenitization, higher hardness after quenching, and the screw still rotates during cooling to achieve uniform cooling, ensure the quality of quenching, and can also perform tempering treatment on the cooled screw to eliminate internal stress, prevent deformation and cracking, and further improve the quality of the screw. Brief Description of the Drawings

[0025] Figure 1 It is a schematic structural diagram of a quenching device for high-performance steel fasteners for wind power proposed by the present invention; Figure 2 It is a schematic structural diagram inside the protective cover of a quenching device for high-performance steel fasteners for wind power proposed by the present invention; Figure 3 It is a rear view of a quenching device for high-performance steel fasteners for wind power proposed by the present invention; Figure 4 It is a schematic structural diagram at the second piston cylinder of a quenching device for high-performance steel fasteners for wind power proposed by the present invention; Figure 5 Schematic cross-sectional view of the second piston cylinder in a high-performance steel fastener quenching device for wind power generation proposed by the present invention; Figure 6 Schematic view of the structure at the first piston cylinder in a high-performance steel fastener quenching device for wind power generation proposed by the present invention; Figure 7 Schematic view of the worm and worm gear structure in a high-performance steel fastener quenching device for wind power generation proposed by the present invention.

[0026] In the figure: 1 processing table, 2 protective cover, 3 feeding track, 4 support, 5 guide rail, 6 first piston cylinder, 7 sleeve, 8 driving block, 9 worm gear, 10 U-shaped pipe, 11 circular plate, 12 material groove, 13 rotating rod, 14 screw, 15 worm, 16 transmission box, 17 gearbox, 18 motor, 19 transmission shaft, 20 first bevel gear, 21 second bevel gear, 22 short shaft, 23 circular block, 24 fourth piston cylinder, 25 fourth moving piston, 26 connecting rod, 27 water tank, 28 delivery pipe, 29 third piston cylinder, 30 second piston cylinder, 31 water inlet pipe, 32 second solenoid valve, 33 lifting block, 34 lifting pipe, 35 driving rod, 36 electromagnetic induction heating coil, 37 limiting frame, 38 water spraying pipe, 39 first solenoid valve, 40 third moving piston, 41 second moving piston, 42 second spring, 43 sliding ring, 44 first spring, 45 screw rod, 46 first moving piston, 47 limiting block. Specific implementation manners

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0028] Refer to Figures 1-7 , a high-performance steel fastener quenching device for wind power generation, including a processing table 1, on which a protective cover 2 is installed for covering and protecting structures such as the motor 18; a feeding track 3 is provided on one side of the processing table 1, a rotating rod 13 is rotated on the upper end of the processing table 1, a circular plate 11 is fixed on the upper end of the rotating rod 13, a plurality of material grooves 12 cooperating with the feeding track 3 are provided on the circular plate 11, screws 14 are fed into the material grooves 12 through the feeding track 3, and the feeding track 3 is cooperatively connected with a vibrating feeding tray. Since the feeding track 3 is inclined, the screws on the feeding track 3 can fall into the material grooves 12 by gravity.

[0029] It also includes a power mechanism for driving the rotation of the circular plate 11. The power mechanism includes a transmission box 16 and a gearbox 17 (reduction box) fixed to the upper end of the processing table 1. A motor 18 is installed on the gearbox 17. The output end of the motor 18 is fixedly connected to one shaft end of the gearbox 17. A transmission shaft 19 is fixed to the other shaft end of the gearbox 17. A support block is fixed on the processing table. The transmission shaft passes through the support block and is rotatably arranged therewith, so that the transmission shaft 19 can be supported to ensure the stability of its rotation.

[0030] A first bevel gear 20 is fixed on the transmission shaft 19. The first bevel gear 20 is an incomplete gear. A worm 15 and a worm gear 9 which are meshed are rotatably arranged in the transmission box 16. A short shaft 22 is fixed on the worm 15. A second bevel gear 21 which is meshed with the first bevel gear 20 is fixed on the short shaft 22. The rotating rod 13 is fixedly connected coaxially with the worm gear 9. When the motor 18 works, it drives the transmission shaft 19 to rotate slowly through the reduction of the gearbox 17.

[0031] The driving block 8 moves downward to cover the upper end of the screw 14 and does not exert a downward pressure on the screw 14. After the driving block 8 covers the outside of the screw 14, it can drive the screw 14 to rotate. For the quenching mechanism for screw quenching, the quenching mechanism includes a driving block 8 which can be lifted and lowered and has a hexagonal groove at the bottom. A bracket 4 is fixedly installed at the upper end of the processing table 1. A first piston cylinder 6 is installed at the bottom of the bracket 4. A first moving piston 46 and a sliding ring 43 are slidably connected in the first piston cylinder 6. A first spring 44 is fixed on the first moving piston 46 and the sliding ring 43. A screw rod 45 is fixed to the bottom of the first moving piston 46. A sleeve 7 which is sleeved outside the screw rod 45 and is in mating connection is rotatably installed in the sliding ring 43. The driving block 8 is fixed to the bottom of the sleeve 7. A limiting block 47 for limiting the sliding ring 43 is fixed to the inner wall of the first piston cylinder 6.

[0032] Wherein, the bottom of the sleeve 7 is sealed. A spiral block is provided inside the sleeve 7 and is in cooperation with the screw rod 45. This part is similar to a toy flying fairy or a hand-pushed frisbee. The hand-pushed sliding sleeve drives the frisbee to rotate on the screw rod.

[0033] An electromagnetic induction heating coil 36 which can be lifted and lowered simultaneously with the driving block 8 is provided on the lower side of the circular plate 11. The electromagnetic induction heating coil 36 performs heat treatment on the rotating screw 14. A second piston cylinder 30 is fixed to the upper end of the processing table 1. A second moving piston 41 is slidably connected in the second piston cylinder 30. A second spring 42 is fixed on the second moving piston 41 and the second piston cylinder 30. The spring constant of the first spring 44 is less than that of the second spring 42. A driving rod 35 is fixed to the upper end of the second moving piston 41. A lifting block 33 is fixed to the upper end of the driving rod 35. A limiting frame 37 is fixed on the lifting block 33. The electromagnetic induction heating coil 36 is installed on the limiting frame 37.

[0034] Among them, a guiding mechanism is further included. The guiding mechanism includes a guide rail 5 fixed to the bracket 4. A guiding groove is provided on the lifting block 33. The lifting block 33 is buckled outside the guide rail 5 through the guiding groove and is slidably arranged.

[0035] Among them, part of the limiting frame 37 is located above the electromagnetic induction heating coil 36. The limiting frame 37 will not contact the screw 14. When the limiting frame 34 abuts against the bottom of the circular plate 11, the electromagnetic induction heating coil 36 cannot move upward at this time. Therefore, the electromagnetic induction heating coil 36 can be protected to avoid being damaged by extrusion due to contact with the circular plate 11.

[0036] A water spraying pipe 38 is provided on one side of the electromagnetic induction heating coil 36. When the electromagnetic induction heating coil 36 moves downward, it can spray water to quench the heat-treated screw. A third piston cylinder 29 is fixed to the upper end of the processing table 1. A third moving piston 40 is slidably connected in the third piston cylinder 29. A lifting pipe 34 is fixedly penetrated on the third moving piston 40. The lifting pipe 34 is fixedly connected to the bottom of the lifting block 33. The water spraying pipe 38 is connected to the lifting pipe 34, and a first electromagnetic valve 39 is installed on the water spraying pipe 38. A water tank 27 is placed on the processing table 1. The water tank 27 is connected to the third piston cylinder 29 through a water inlet pipe 31, and a second electromagnetic valve 32 is installed on the water inlet pipe 31.

[0037] A pump oil mechanism for conveying hydraulic oil to the first piston cylinder 6 and the second piston cylinder 30 is further included. The pump oil mechanism includes a circular block 23 fixed to the transmission shaft 19. A fourth piston cylinder 24 is fixed to the processing table 1. A fourth moving piston 25 is slidably connected in the fourth piston cylinder 24. A connecting rod 26 is hinged to the fourth moving piston 25. The connecting rod 26 is eccentrically connected to the circular block 23. A conveying pipe 28 is installed on the fourth piston cylinder 24. The first piston cylinder 6 and the second piston cylinder 30 are connected through a U-shaped pipe 10. The conveying pipe 28 is connected to the U-shaped pipe 10.

[0038] When the driving block 8 and the electromagnetic induction heating coil 36 move again, tempering treatment can be performed on the screw 14. When the electromagnetic induction heating coil 36 and the water spraying pipe 38 move downward, the water spraying pipe 38 stops spraying water.

[0039] When the present invention is in use, the screws 14 are successively conveyed into the material groove 12. The motor 18 works and drives the transmission shaft 19 to rotate slowly through the transmission of the gearbox 17. The rotation of the transmission shaft 19 drives the first bevel gear 20 to rotate. When the first bevel gear 20 is not engaged with the second bevel gear 21, the screw 14 is directly opposite to the driving block 8 at this time. Due to the arrangement of the worm gear 9 and the worm 15, the rotating rod 13 is locked and cannot rotate. Therefore, the stability of the circular plate 11 can be ensured. At this time, the material groove 12 is directly opposite to the feeding track 3 for feeding.

[0040] The rotation of the transmission shaft 19 drives the rotation of the circular block 23. Under the transmission of the connecting rod 26, the fourth moving piston 25 moves within the fourth piston cylinder 24. The fourth moving piston 25 moves away from the circular block 23. In this way, the hydraulic oil within the fourth piston cylinder 24 can be transported through the delivery pipe 28 and the U-shaped pipe 10 to the first piston cylinder 6 and the second piston cylinder 30. Since the spring constant of the first spring 44 is less than that of the second spring 42, the increase in hydraulic oil within the first piston cylinder 6 drives the movement of the first moving piston 46. The movement of the first moving piston 46 compresses the first spring 44, the sliding ring 43, the sleeve 7, and the driving block 8 downward. Eventually, the sliding ring 43 abuts against the limiting block 47. At this time, the driving block 8 sleeves outside the screw 14 and does not exert a downward pressure on the screw 14. In this way, the screw 14 will not generate pressure with the circular plate 11, resulting in an increase in friction when it rotates.

[0041] Since the sliding ring 43 cannot move downward, the continuous transportation of hydraulic oil into the first piston cylinder 6 will cause the first moving piston 46 to move and compress the first spring 44. The movement of the first moving piston 46 drives the screw rod 45 to move within the sleeve 7, thereby driving the rotation of the sleeve 7. The rotation of the sleeve 7 drives the rotation of the driving block 8 and the screw 14.

[0042] When the first moving piston 46 moves and drives the screw rod 45 to move within the sleeve 7, the increase in hydraulic oil within the second piston cylinder 30 at this time drives the second moving piston 41 to move upward. The upward movement of the second moving piston 41 drives the driving rod 35 and the lifting block 33 to move upward. The upward movement of the lifting block 33 drives the limiting frame 37 and the electromagnetic induction heating coil 36 to move upward. The upward movement of the electromagnetic induction heating coil 36 performs heat treatment on the rotating screw 14. In this way, the screw 14 can be evenly heated to ensure uniform heating.

[0043] The upward movement of the lifting block 33 drives the lifting pipe 34 and the third moving piston 40 to move upward. When the third moving piston 40 moves upward, the first solenoid valve 39 closes, and the second solenoid valve 32 opens. In this way, the water within the water tank 27 can be sucked into the third piston cylinder 29 through the water inlet pipe 31.

[0044] When the limiting frame 37 abuts against the circular plate 11, the transmission shaft 19 drives the connecting rod 26 and the fourth moving piston 25 to move back, and each part gradually returns to its original position. At this time, the first solenoid valve 39 opens, and the second solenoid valve 32 closes; the electromagnetic induction heating coil 36 moves downward to continue heat treatment on the screw 14. The downward movement of the lifting block 33 drives the lifting pipe 34 and the third moving piston 40 to move downward. The third moving piston 40 moves downward to squeeze the internal cooling water, and the cooling water is sprayed out through the spray pipe 38 and sprayed onto the heated screw 14. In this way, the heated screw 14 can be quickly cooled down.

[0045] Each of the above parts is reset, but not completely. That is, when the electromagnetic induction heating coil 36 just detaches from the screw 14, the screw rod 45 moves upward and resets following the first moving piston 46. This causes the sleeve 7 to reverse, and the sleeve 7 drives the driving block 8 and the screw 14 to reverse. In this way, the heat treatment effect of the screw 14 is better through forward and reverse rotation, and the heating is more uniform. When cooling the screw 14, it is still in a rotating state, so that the temperature can be evenly reduced, ensuring the quality of quenching and the hardness of the screw 14.

[0046] When the motor 18 reverses, the electromagnetic induction heating coil 36 can move upward, which is the same as the heat treatment of the screw 14 as described above. In this way, the tempered screw 14 after cooling can be tempered to eliminate internal stress and prevent deformation and cracking. The reason is that during the quenching (rapid cooling) process of the screw, the cooling rates of the surface and the core are different, resulting in residual tensile stress inside. If the stress exceeds the material strength limit, the screw may be deformed or even cracked. This can ensure the quality of the screw after heat treatment.

[0047] Since the first solenoid valve 39 is opened and the second solenoid valve 32 is closed, when the third moving piston 40 moves up and down, it only reciprocally conveys the water in the water tank 27 and does not spray it out through the water spray pipe 38.

[0048] After the tempering treatment is completed, the motor 18 rotates forward again to drive each part to be completely reset. Then the first bevel gear 20 meshes with the second bevel gear 21 again, so that the short shaft 22 and the worm 15 can be driven to rotate. The rotation of the worm 15 drives the worm wheel 9 to rotate, and the rotation of the worm wheel 9 drives the rotating rod 13 and the circular plate 11 to rotate. After another screw 14 is aligned with the driving block 8, the first bevel gear 20 and the second bevel gear 21 no longer mesh, and the above-mentioned quenching and tempering treatment processes of the screw 14 are repeated.

[0049] The present invention also discloses a high-precision screw energy-saving quenching process, including the following steps: S1, Initial preparation and loading: The screws 14 are successively conveyed into the material trough 12. The motor 18 operates, and drives the transmission shaft 19 to rotate slowly through the transmission of the gearbox 17, and the first bevel gear 20 rotates: The rotation of the transmission shaft 19 drives the first bevel gear 20 to rotate. When the first bevel gear 20 does not mesh with the second bevel gear 21, the screw 14 is aligned with the driving block 8. Due to the setting of the worm wheel 9 and the worm 15, the rotating rod 13 is locked and cannot rotate, ensuring the stability of the circular plate 11. At this time, the material trough 12 is aligned with the guiding track 3, and the loading is completed; S2, Quenching Treatment: The rotation of the transmission shaft 19 drives the rotation of the circular block 23. Through the transmission of the connecting rod 26, the fourth moving piston 25 moves within the fourth piston cylinder 24. The hydraulic oil within the fourth piston cylinder 24 is transported to the first piston cylinder 6 and the second piston cylinder 30 through the delivery pipe 28 and the U-shaped pipe 10. Since the spring constant of the first spring 44 is less than that of the second spring 42, the increase in hydraulic oil within the first piston cylinder 6 drives the movement of the first moving piston 46, squeezing the first spring 44, the sliding ring 43, the sleeve 7, and the driving block 8 downward. The sliding ring 43 abuts against the limiting block 47, and the driving block 8 is sleeved outside the screw 14 without generating a downward pressure. Hydraulic oil continues to be transported into the first piston cylinder 6, and the first moving piston 46 moves to squeeze the first spring 44, driving the screw rod 45 to move within the sleeve 7, and then driving the sleeve 7 to rotate. The rotation of the sleeve 7 drives the driving block 8 and the screw 14 to rotate. The increase in hydraulic oil within the second piston cylinder 30 drives the second moving piston 41 to move upward, driving the driving rod 35 and the lifting block 33 upward. The upward movement of the lifting block 33 drives the limiting frame 37 and the electromagnetic induction heating coil 36 upward to perform heat treatment on the rotating screw 14. The upward movement of the lifting block 33 drives the lifting pipe 34 and the third moving piston 40 upward. The first solenoid valve 39 closes, and the second solenoid valve 32 opens. The water within the water tank 27 is sucked into the third piston cylinder 29 through the water inlet pipe 31.

[0050] S3, Quenching Cooling: The transmission shaft 19 drives the connecting rod 26 and the fourth moving piston 25 to move back, and each part gradually returns to its original position. At this time, the first solenoid valve 39 opens, and the second solenoid valve 32 closes. The electromagnetic induction heating coil 36 moves downward to continue heat treatment on the screw 14. The third moving piston 40 moves downward: The downward movement of the lifting block 33 drives the lifting pipe 34 and the third moving piston 40 downward, squeezing the internal cooling water and spraying it out through the spray pipe 38 to rapidly cool down the heated screw 14. The sleeve 7 rotates in the reverse direction: The screw rod 45 follows the upward movement of the first moving piston 46 to reset, and the sleeve 7 rotates in the reverse direction, driving the driving block 8 and the screw 14 to rotate in the reverse direction. By rotating forward and backward, it ensures that the screw 14 is evenly heated and cooled, guaranteeing the quenching quality and hardness.

[0051] S4, Tempering Treatment: The motor 18 rotates in the reverse direction, and the electromagnetic induction heating coil 36 moves upward to perform tempering treatment on the cooled screw 14 to eliminate internal stress and prevent deformation and cracking. Tempering principle: During the quenching process of the screw, the cooling rates of the surface and the core are different, resulting in the generation of residual tensile stress inside. If the stress exceeds the material strength limit, the screw may deform or even crack. The tempering treatment ensures the quality of the screw after heat treatment. Since the first solenoid valve 39 opens and the second solenoid valve 32 closes, the third moving piston 40 moves up and down, only reciprocatingly transporting the water within the water tank 27 and not spraying it out through the spray pipe 38.

[0052] S5. Completion of processing and resetting: After the reverse rotation of the motor 18 completes the tempering process, the motor 18 rotates forward again to drive all parts to be completely reset, and the first bevel gear 20 meshes with the second bevel gear 21: The first bevel gear 20 meshes with the second bevel gear 21 again to drive the short shaft 22 and the worm 15 to rotate. The rotation of the worm 15 drives the worm gear 9 to rotate, and the rotation of the worm gear 9 drives the rotating rod 13 and the circular plate 11 to rotate, so that another screw 14 is aligned with the driving block 8. The first bevel gear 20 and the second bevel gear 21 no longer mesh, and the above-mentioned quenching and tempering process for the screw 14 is repeated.

[0053] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A high-performance steel fastener quenching device for wind power, comprising a processing table (1), a feeding track (3) is arranged on one side of the processing table (1), a rotating rod (13) is rotated on the upper end of the processing table (1), a circular plate (11) is fixed on the upper end of the rotating rod (13), a plurality of material grooves (12) matching with the feeding track (3) are arranged on the circular plate (11), screws (14) are fed into the material grooves (12) through the feeding track (3), and the characteristics are as follows ； Quenching mechanism for screw quenching. The quenching mechanism includes a driving block (8) that can be lifted and lowered and has a hexagonal groove at the bottom. The driving block (8) moves down to cover the upper end of the screw (14) without exerting a downward pressure on the screw (14). After the driving block (8) covers the outside of the screw (14), it can drive the screw (14) to rotate. A electromagnetic induction heating coil (36) that can be lifted and lowered simultaneously with the driving block (8) is provided on the lower side of the circular plate (11). The electromagnetic induction heating coil (36) performs heat treatment on the rotating screw (14). A water spray pipe (38) is provided on one side of the electromagnetic induction heating coil (36). The electromagnetic induction heating coil (36) moves down to spray water quenching on the heat-treated screw. When the driving block (8) and the electromagnetic induction heating coil (36) move again, tempering treatment can be performed on the screw (14). When the electromagnetic induction heating coil (36) and the water spray pipe (38) move down, the water spray pipe (38) stops spraying water.

2. The quenching device for high-performance steel fasteners used in wind power according to claim 1, characterized in that, It also includes a power mechanism for driving the circular plate (11) to rotate. The power mechanism includes a transmission box (16) and a gearbox (17) fixed to the upper end of the processing table (1). A motor (18) is installed on the gearbox (17). The output end of the motor (18) is fixedly connected to one shaft end of the gearbox (17). Another shaft end of the gearbox (17) is fixed with a transmission shaft (19). A first bevel gear (20) is fixed on the transmission shaft (19). The first bevel gear (20) is an incomplete gear. A worm (15) and a worm wheel (9) that are meshed are rotated in the transmission box (16). A short shaft (22) is fixed on the worm (15). A second bevel gear (21) that meshes with the first bevel gear (20) is fixed on the short shaft (22). The rotating rod (13) is coaxially and fixedly connected to the worm wheel (9).

3. The quenching device for high-performance steel fasteners used in wind power according to claim 2, characterized in that, A bracket (4) is fixedly installed on the upper end of the processing table (1). A first piston cylinder (6) is installed at the bottom of the bracket (4). A first moving piston (46) and a sliding ring (43) are slidably connected in the first piston cylinder (6). A first spring (44) is fixed on the first moving piston (46) and the sliding ring (43). A screw rod (45) is fixed to the bottom of the first moving piston (46). A sleeve (7) that is sleeved outside the screw rod (45) and is in mating connection is rotatably installed in the sliding ring (43). The driving block (8) is fixed to the bottom of the sleeve (7). A limiting block (47) for limiting the sliding ring (43) is fixed to the inner wall of the first piston cylinder (6).

4. A quenching device for high-performance steel fasteners used in wind power, characterized in that, A second piston cylinder (30) is fixed to the upper end of the processing table (1). A second moving piston (41) is slidably connected in the second piston cylinder (30). A second spring (42) is fixed on the second moving piston (41) and the second piston cylinder (30). A driving rod (35) is fixed to the upper end of the second moving piston (41). A lifting block (33) is fixed to the upper end of the driving rod (35). A limiting frame (37) is fixed on the lifting block (33). The electromagnetic induction heating coil (36) is installed on the limiting frame (37).

5. The quenching device for high-performance steel fasteners used in wind power according to claim 4, characterized in that A third piston cylinder (29) is fixed to the upper end of the processing table (1). A third moving piston (40) is slidably connected in the third piston cylinder (29). A lifting pipe (34) is fixedly penetrated through the third moving piston (40). The lifting pipe (34) is fixedly connected to the bottom of the lifting block (33). The water spraying pipe (38) is connected to the lifting pipe (34), and a first electromagnetic valve (39) is installed on the water spraying pipe (38). A water tank (27) is placed on the processing table (1). The water tank (27) is connected to the third piston cylinder (29) through a water inlet pipe (31), and a second electromagnetic valve (32) is installed on the water inlet pipe (31).

6. The quenching device for high-performance steel fasteners used in wind power according to claim 1, characterized in that, It further includes an oil pumping mechanism for delivering hydraulic oil into the first piston cylinder (6) and the second piston cylinder (30). The oil pumping mechanism includes a circular block (23) fixed on the transmission shaft (19). A fourth piston cylinder (24) is fixed on the processing table (1). A fourth moving piston (25) is slidably connected in the fourth piston cylinder (24). A connecting rod (26) is hingedly connected to the fourth moving piston (25). The connecting rod (26) is eccentrically connected to the circular block (23). A delivery pipe (28) is installed on the fourth piston cylinder (24). The first piston cylinder (6) and the second piston cylinder (30) are connected through a U-shaped pipe (10). The delivery pipe (28) is connected to the U-shaped pipe (10).

7. A quenching device for high-performance steel fasteners used in wind power, characterized in that, It further includes a guiding mechanism. The guiding mechanism includes a guide rail (5) fixed on the bracket (4). A guiding groove is provided on the lifting block (33). The lifting block (33) is buckled outside the guide rail (5) through the guiding groove and is slidably arranged.

8. A quenching device for high-performance steel fasteners used in wind power, characterized in that, Part of the limiting frame (37) is located above the electromagnetic induction heating coil (36), and the limiting frame (37) will not contact the screw (14).

9. A quenching device for high-performance steel fasteners used in wind power, characterized in that, The spring constant of the first spring (44) is less than the spring constant of the second spring (42).

10. A high-precision energy-saving quenching process for screws, applied to the quenching device described in any one of claims 1-9, characterized in that, It includes the following steps: S1, Initial preparation and feeding: The screws (14) are successively delivered into the material trough (12). The motor (18) works, and drives the transmission shaft (19) to slowly rotate through the transmission of the gearbox (17), and the first bevel gear (20) rotates. The rotation of the transmission shaft (19) drives the first bevel gear (20) to rotate. When the first bevel gear (20) is not engaged with the second bevel gear (21), the screw (14) is aligned with the driving block (8). Due to the arrangement of the worm gear (9) and the worm (15), the rotating rod (13) is locked and cannot rotate, ensuring the stability of the circular plate (11). The material trough (12) is aligned with the material guiding track (3), and the feeding is completed. S2, Quenching treatment: The transmission shaft (19) rotates to drive the circular block (23) to rotate. Through the transmission of the connecting rod (26), the fourth moving piston (25) moves within the fourth piston cylinder (24). The hydraulic oil in the fourth piston cylinder (24) is transported to the first piston cylinder (6) and the second piston cylinder (30) through the delivery pipe (28) and the U-shaped pipe (10). Since the spring constant of the first spring (44) is less than that of the second spring (42), the hydraulic oil in the first piston cylinder (6) increases, driving the first moving piston (46) to move, squeezing the first spring (44), the sliding ring (43), the sleeve (7), and the driving block (8) downward. The sliding ring (43) abuts against the limiting block (47), and the driving block (8) is sleeved outside the screw (14), without generating a downward pressure. The hydraulic oil continues to be transported into the first piston cylinder (6), and the first moving piston (46) moves to squeeze the first spring (44), driving the screw rod (45) to move within the sleeve (7), and then driving the sleeve (7) to rotate. The rotation of the sleeve (7) drives the driving block (8) and the screw (14) to rotate. The hydraulic oil in the second piston cylinder (30) increases, driving the second moving piston (41) to move upward, driving the driving rod (35) and the lifting block (33) upward. The upward movement of the lifting block (33) drives the limiting frame (37) and the electromagnetic induction heating coil (36) upward to perform heat treatment on the rotating screw (14). The upward movement of the lifting block (33) drives the lifting pipe (34) and the third moving piston (40) upward. The first solenoid valve (39) closes, and the second solenoid valve (32) opens. The water in the water tank (27) is sucked into the third piston cylinder (29) through the water inlet pipe (31). S3, Quenching and cooling: The transmission shaft (19) drives the connecting rod (26) and the fourth moving piston (25) to move back, and all parts gradually return to their original positions. At this time, the first solenoid valve (39) opens, and the second solenoid valve (32) closes. The electromagnetic induction heating coil (36) moves downward to continue heat treatment on the screw (14). The third moving piston (40) moves downward: The downward movement of the lifting block (33) drives the lifting pipe (34) and the third moving piston (40) downward, squeezing the internal cooling water, which is sprayed out through the spray pipe (38) to quickly cool down the heated screw (14). The sleeve (7) rotates in the reverse direction: The screw rod (45) follows the first moving piston (46) to move upward and return to its original position. The sleeve (7) rotates in the reverse direction, driving the driving block (8) and the screw (14) to rotate in the reverse direction. By rotating forward and backward, it ensures that the screw (14) is evenly heated and cooled, guaranteeing the quenching quality and hardness. S4, Tempering treatment: The motor (18) rotates in the reverse direction, and the electromagnetic induction heating coil (36) moves upward to perform tempering treatment on the cooled screw (14). Since the first solenoid valve (39) is open and the second solenoid valve (32) is closed, the third moving piston (40) moves up and down, only reciprocally transporting the water in the water tank (27) and not spraying it out through the spray pipe (38). S5. Completion of processing and resetting: After the reverse rotation of the motor (18) completes the tempering process, the motor (18) rotates forward again to drive all parts to be completely reset, and the first bevel gear (20) meshes with the second bevel gear (21): The first bevel gear (20) meshes with the second bevel gear (21) again to drive the short shaft (22) and the worm (15) to rotate. The rotation of the worm (15) drives the worm wheel (9) to rotate, and the rotation of the worm wheel (9) drives the rotating rod (13) and the circular plate (11) to rotate, so that another screw (14) is aligned with the driving block (8). The first bevel gear (20) no longer meshes with the second bevel gear (21), and the above-mentioned quenching and tempering process for the screw (14) is repeated.

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