A metal heat treatment process

Abstract

This invention provides a metal heat treatment process, relating to the field of heat treatment technology. The metal heat treatment process mainly includes the following steps: S1, Multifunctional blade mounting: Agricultural machinery blades requiring heat treatment are placed and mounted on an intermittently rotating blade turntable. Each blade is positioned by several sets of positioning bosses located near the edge of the turntable at the top of each blade layer, ensuring the blade is positioned at the corresponding position on the top of the turntable. This invention automates the batch transfer, oil quenching, and collection operations for each agricultural machinery blade using a metal heat treatment device, with uniform operation time. It allows for simultaneous batch heat treatment of multiple agricultural machinery blades, effectively controlling the quenching process, quenching time, and operation flow of several agricultural machinery blades in the same batch, ensuring identical mechanical properties and consistent quality between different products.

Description

Technical Field

[0001] This invention relates to the field of heat treatment technology, specifically a metal heat treatment process. Background Technology

[0002] Agricultural machinery blades are an important part of agricultural machinery operations, their edges designed to pierce, cut, or scrape material surfaces. Blades can be made from materials such as flint, metal (usually steel), ceramics, or others. Blades are among the oldest tools humankind has used throughout history, in combat, food preparation, and for many other purposes.

[0003] Agricultural machinery blades have complex and varied structures, with different blade shapes designed for different agricultural machines. However, regardless of the type of blade, heat treatment is often necessary to obtain excellent mechanical properties. Currently, the heat treatment of agricultural blades mainly involves manually clamping the blades and placing the cutting edge area into a medium-frequency or high-frequency induction hardening heat processor. The heat generated by the medium-frequency or high-frequency induction heat treatment is used to locally harden the cutting edge area. However, when factories mass-produce blades, using manual clamping for heat treatment results in low blade hardening efficiency, high manual labor, and variations in the mechanical properties of blades from the same batch due to different hardening times. Summary of the Invention

[0004] To address the problems in the existing technology, the present invention aims to provide a metal heat treatment process that solves the problems described in the background art above: Currently, the heat treatment of agricultural blades mainly involves manually clamping the blades and placing the cutting edge area of ​​the blade into a medium-frequency or high-frequency induction hardening heat processor. The heat generated by the medium-frequency or high-frequency induction heat treatment is used to locally harden the cutting edge area of ​​the blade. However, when factories mass-produce blades, using manual clamping for heat treatment results in low blade hardening efficiency, high manual labor load, and the possibility of different hardening times in the same batch of blades, leading to differences in the mechanical properties of the blades.

[0005] The technical problem to be solved by the present invention is achieved by the following technical solution: a metal heat treatment process, which mainly includes the following steps:

[0006] A metal heat treatment process, which mainly includes the following steps:

[0007] S1. Multifunctional blade installation: Place the agricultural machinery blades that need to be heat-treated on the intermittently rotating blade turntable. Each agricultural machinery blade is installed and positioned by several sets of positioning bosses set at the top of each blade turntable near the edge of the blade turntable, so that the blade is placed at the corresponding position at the top of the blade turntable.

[0008] S2. High-temperature heating of the blade: The agricultural machinery blades placed on the blade turntable are rotated intermittently. The rotation of the blade turntable drives the agricultural machinery blades into the corresponding induction hardening clamps and stays there. The two induction hardening plates of the induction hardening clamps heat the surface of the agricultural machinery blades to about 900 degrees Celsius.

[0009] S3. Blade transfer and rapid pickup: The agricultural machinery blade heated to about 900 degrees Celsius in step S2 is transferred. The heated agricultural machinery blade is transferred to the next station by the intermittent rotation of the blade turntable. The agricultural machinery blade is picked up by the pickup component and rotated 90 degrees by the pickup component to prepare for oil quenching of the agricultural machinery blade.

[0010] S4. The blades are moved down in batches and soaked; After the pick-up component in step S2 picks up several agricultural machinery blades from the blade turntables on both sides, rotates them 90 degrees and moves them down into the oil tank quickly through the pick-up component. The several agricultural machinery blades moved down into the oil tank stay in the oil tank for 1-5 seconds and the surface of the agricultural machinery blades is quickly quenched and cooled by the quenching oil in the oil tank.

[0011] S5. The blades are lifted and transferred from the oil tank in batches: In step S4, the picking component lifts several agricultural machinery blades that have been rapidly quenched and cooled up from the oil tank, rotates the lifted agricultural machinery blades 90 degrees, lowers them by 5 cm, and puts the rapidly quenched and cooled agricultural machinery blades down onto the guide plate, and then drops them down into the blade collection box of agricultural machinery blades through the guide plate.

[0012] S6. Picking up while putting down: In step 5, while the picking component puts the agricultural machinery blades down onto the guide plate, the other end of the picking component picks up the blades that have not been quenched and cooled. At this time, the picking component is rotated 90 degrees and steps S3-S5 are repeated to perform rapid heat treatment on several batches of agricultural machinery blades.

[0013] As a preferred technical solution of the present invention, the steps S1-S5 described above are mainly completed by a metal heat treatment device. The metal heat treatment device includes a fixed base fixed to the ground, an oil tank fixedly installed in the middle of the fixed base, a quenching oil being placed in the oil tank, a support column upright at the top of the fixed base, a rotating shaft rotatably connected to the top of the support column, and several layers of blade turntables fixedly installed on the outer wall of the rotating shaft. Agricultural machinery blades are installed at equal intervals around the top of each layer of the turntable.

[0014] The rotating shaft extends upward through a rolling bearing and passes through a fixed plate, which is fixed to the top of a fixed base.

[0015] Each blade turntable is configured as a disc structure. At the top of each blade turntable, a number of positioning bosses are fixedly arranged in groups at equal intervals around the circumference. The agricultural machinery blades are installed at equal intervals on the edge of the blade turntable through each group of positioning bosses at the top of the blade turntable. A support shaft is fixedly installed on the edge of the blade turntable. An induction hardening clamp with the same number of blade turntable layers is fixed on the outer wall of the support shaft.

[0016] A motor bracket is fixedly installed at the top of the oil tank, and a liftable and rotatable pickup component is installed at the top of the motor bracket. The pickup component picks up the agricultural machinery blades on the blade turntables on both sides of the oil tank and lifts and lowers them into the quenching oil in the oil tank for quenching.

[0017] A blade collection box is placed on the side of the oil tank. Several guide plates are fixedly placed on the top of the blade collection box, and the top surface of several of the guide plates is at the same height as the blade turntable of each layer.

[0018] As a preferred embodiment of the present invention, a slave gear is fixedly installed on the outer wall of the rotating shaft, a servo motor is fixedly installed on the outer wall of the support column, an output shaft extends upward from the servo motor, a drive gear is fixedly installed at the top of the output shaft of the servo motor, and the drive gear meshes with the slave gear.

[0019] As a preferred embodiment of the present invention, the pickup assembly includes a motor support arm fixed to the top of the motor bracket, a second pneumatic short cylinder fixedly installed at the top of the motor support arm, a piston rod extending downward from the second pneumatic short cylinder, a lifting plate fixedly installed at the bottom of the piston rod of the second pneumatic short cylinder, a first pneumatic long cylinder fixedly installed at the top of the lifting plate, a piston rod extending downward from the first pneumatic long cylinder, an ear plate bracket fixedly installed at the bottom of the piston rod of the first pneumatic long cylinder, and the ear plate bracket fixed to the outer wall of the sleeve;

[0020] The sleeve is rotatably connected to a downward vertical lifting shaft in the middle. A spline shaft is provided at the top of the lifting shaft. An AC asynchronous motor is fixedly installed on the other side of the motor bracket. An output shaft extends from the bottom of the AC asynchronous motor. A dial wheel is fixedly installed at the bottom of the output shaft of the AC asynchronous motor. A spline wheel is slidably connected to the outer wall of the spline shaft. The spline wheel is fixed to the top of the grooved wheel. The grooved wheel is rotatably connected to the motor bracket. The dial wheel and the grooved wheel are intermittently engaged.

[0021] As a preferred embodiment of the present invention, the outer wall of the lifting shaft is symmetrically provided with support arms that match the blade turntables on both sides, and the top of each support arm is provided with a blade-collecting suction cup.

[0022] As a preferred embodiment of the present invention, each of the blade-collecting suction cups is configured as an arc-shaped plate structure, and a plurality of electromagnetic relays are fixedly installed at equal intervals at the bottom end of each blade-collecting suction cup with an arc-shaped plate structure.

[0023] As a preferred embodiment of the present invention, each of the induction hardening clips includes two parallel induction hardening plates, with a spacing between the two induction hardening plates slightly larger than the thickness of the agricultural machinery blade, and each induction hardening plate is an arc-shaped plate structure, with an induction coil disposed inside each induction hardening plate.

[0024] As a preferred embodiment of the present invention, the bottom of the outer wall of the support column is provided with a reinforcing rib plate.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] I. This invention is applicable to mass production in factories. When mass-producing agricultural machinery blades in a factory, workers only need to manually move the blades for loading. During the intermittent stop time of the blade turntable, workers install the blades in batches at predetermined positions on the intermittently rotating blade turntable. The metal heat treatment device automatically completes the transfer, oil quenching, and collection of each batch of agricultural machinery blades, and the operation time is uniform. Multiple agricultural machinery blades can be subjected to the same heat treatment at the same time, effectively controlling the quenching process, quenching time, and operation process of several agricultural machinery blades in the same batch to be the same, so that several agricultural machinery blades in the same batch obtain the same mechanical properties and there is no difference in the quality of inferior products.

[0027] Second, by intermittently rotating the picking component, which rotates at 90 degrees between the guide plate and the blade turntable, the picking component can simultaneously pick up agricultural machinery blades in batches and put down quenched agricultural machinery blades in batches. This effectively reduces the time consumed during the transfer of agricultural machinery blades, making the heat treatment efficiency of metal workpieces provided by the present invention higher. Compared with other heat treatment devices, the heat treatment output is greater in the same time, and the heat treatment production cycle can be shortened by at least one-fifth.

[0028] Third, by setting the pickup component on the right side of the induction hardening plate, the present invention allows the blade after the induction hardening plate has been heated to be quickly transferred to the quenching oil in the oil tank for oil cooling and heat dissipation. This reduces the time the blade is exposed to air after heating and the time the blade is cooled by air, thus reducing the impact of air cooling on the internal structure of the blade. Attached Figure Description

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] Figure 1This is a flowchart of the metal heat treatment process of the present invention;

[0031] Figure 2 This is a front view schematic diagram of the metal heat treatment apparatus of the present invention;

[0032] Figure 3 Included with instruction manual Figure 2 A partial cross-sectional structural diagram of the rotating connection between the sleeve and the lifting shaft;

[0033] Figure 4 This is a top view of the metal heat treatment apparatus of the present invention.

[0034] Figure 5 This is a top view of the pickup component of the present invention after it has been rotated 90 degrees.

[0035] Figure 6 This is a schematic diagram of the structure of the agricultural machinery blade of the present invention moving within the distance between two induction hardening plates;

[0036] Figure 7 Appendix to the specification of this invention Figure 4 A magnified view of a portion of the image;

[0037] Figure 8 This is a schematic diagram of the structure of the agricultural machinery blade of the present invention;

[0038] In the diagram: 1. Fixed base; 2. Reinforcing rib plate; 3. Support column; 4. Servo motor; 5. Drive gear; 6. Slave gear; 7. Rotating shaft; 8. Fixing plate; 9. Blade turntable; 11. Agricultural machinery blade; 13. Blade pickup suction cup; 14. Electromagnetic relay; 15. AC asynchronous motor; 16. Motor bracket; 17. Splined shaft; 18. First air pressure long cylinder; 19. Second air pressure short cylinder; 20. Motor bracket arm; 21. Lifting pallet; 22. Ear plate bracket; 23. C23. Quenching oil; 24. Oil tank; 25. Sleeve; 26. Splined wheel; 27. Dial wheel; 28. Induction quenching plate; 29. ​​Induction coil; 30. Support shaft; 31. Positioning boss; 32. Grooved wheel; 33. Support arm; 34. Guide plate; 35. Blade collection box; 36. Detailed Implementation

[0039] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific figures. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0040] Example 1

[0041] Please see Figure 1 This is a schematic diagram of the overall structure of a metal heat treatment process.

[0042] A metal heat treatment process, which mainly includes the following steps:

[0043] S1. Multifunctional blade installation: The agricultural machinery blade 11 that needs to be heat-treated is placed on the intermittently rotating blade turntable 9. Each agricultural machinery blade 11 is installed and positioned by a number of positioning bosses 32 set at the top of each blade turntable 9 near the edge of the blade turntable 9, so that the blade is placed at the corresponding position at the top of the blade turntable 9.

[0044] S2. High-temperature heating of the blade: The agricultural machinery blade 11 placed on the blade turntable 9 is rotated intermittently. The rotation of the blade turntable 9 drives the agricultural machinery blade 11 to enter the corresponding induction hardening clamp and stay there. The two induction hardening plates 29 of the induction hardening clamp heat the surface of the agricultural machinery blade 11 to about 900 degrees Celsius, with the temperature not exceeding 100 degrees Celsius.

[0045] S3. Blade transfer and rapid pickup: The agricultural machinery blade 11 heated to about 900 degrees Celsius in step S2 is transferred. The blade turntable 9 rotates intermittently, which drives the heated agricultural machinery blade 11 to the next station. The agricultural machinery blade 11 is picked up by the pickup component, and the picked agricultural machinery blade 11 is rotated 90 degrees by the pickup component to prepare for oil quenching of the agricultural machinery blade 11.

[0046] S4. The blades are moved down in batches and soaked; After the picking component in step S2 picks up several agricultural machinery blades 11 from the blade turntables 9 on both sides, rotates them 90 degrees and moves them down into the oil tank 25 quickly through the picking component. The several agricultural machinery blades 11 that have been moved down into the oil tank 25 stay in the oil tank 25 for 1-5 seconds, and the surface of the agricultural machinery blades 11 is rapidly quenched and cooled by the quenching oil 24 in the oil tank 25.

[0047] S5. The blades are lifted and transferred in batches from the oil tank 25: In step S4, the picking component lifts several agricultural machinery blades 11 after rapid quenching and cooling from the oil tank 25, rotates the lifted agricultural machinery blades 11 90 degrees, lowers them by 5 cm, and puts the rapidly quenched and cooled agricultural machinery blades 11 onto the guide plate 35, and then drops them down into the blade collection box 36 of the agricultural machinery blades 11 through the guide plate 35.

[0048] S6. Picking up while putting down: In step 5, while the picking component puts the agricultural machinery blade 11 onto the guide plate 35, the other end of the picking component picks up the blade that has not been quenched and cooled. At this time, the picking component is rotated 90 degrees and steps S3-S5 are repeated to perform rapid heat treatment on several batches of agricultural machinery blades 11.

[0049] Example 2

[0050] Please see Figure 1-8This embodiment has the same features as Embodiments 1 and 2 above, and these similarities will not be elaborated in this embodiment. The specific differences are as follows:

[0051] The steps S1-S5 described above are mainly completed by a metal heat treatment device. The metal heat treatment device includes a fixed base 1 fixed to the ground. An oil tank 25 is fixedly installed in the middle of the fixed base 1. Quenching oil 24 is placed in the oil tank 25. A support column 3 is set at the top of the fixed base 1. A rotating shaft 7 is rotatably connected to the top of the support column 3. Several layers of blade turntables 9 are fixedly installed on the outer wall of the rotating shaft 7. Agricultural machinery blades 11 are installed at equal intervals around the top of each layer of turntables.

[0052] The rotating shaft 7 extends upward through the fixed plate 8 via a rolling bearing, and the fixed plate 8 is fixed to the top of the fixed base 1.

[0053] Each blade turntable 9 is configured as a disc structure. At the top of each blade turntable 9, a number of positioning bosses 32 are fixedly arranged in groups at equal intervals around the circumference. The agricultural machinery blades 11 are installed at equal intervals on the edge of the blade turntable 9 through each group of positioning bosses 32 at the top of the blade turntable 9. A support shaft 31 is fixedly installed on the edge of the blade turntable 9. The outer wall of the support shaft 31 is fixed with induction hardening clips of the same number as the number of layers of the blade turntable 9.

[0054] The blade turntable 9 rotates at the top of the fixed plate 8 by the servo motor 4 below the fixed plate 8 driving the drive gear 5 to rotate intermittently. During the rotation of the drive gear 5, the slave gear 6 is driven to rotate through gear meshing. The rotation of the slave gear 6 drives the rotating shaft 7 to rotate, and the rotation of the rotating shaft 7 drives all the blade turntables 9 to rotate synchronously.

[0055] A motor bracket 16 is fixedly installed at the top of the oil tank 25. A liftable and rotatable pickup component is installed at the top of the motor bracket 16. The pickup component picks up the agricultural machinery blades 11 on the blade turntables 9 on both sides of the oil tank 25 and lifts and places them in the quenching oil 24 of the oil tank 25 for quenching.

[0056] A blade collection box 36 is placed on the side of the oil tank 25. Several guide plates 35 are fixedly placed on the top of the blade collection box 36, wherein the top surface of several guide plates 35 is at the same height as the blade turntable 9 of each layer.

[0057] The blade turntable 9 has several positioning bosses 32 at its top, which facilitate the installation and positioning of the agricultural machinery blades 11 on the turntable 9. The agricultural machinery blades 11 are fixed at the top of the blade turntable 9 according to their corresponding positions. The rotating shaft 7 rotates intermittently, dragging several agricultural machinery blades 11 on each layer of the blade turntable 9 to rotate synchronously and intermittently. The rotation of the blade turntable 9 drives the agricultural machinery blades 11 to enter the corresponding induction hardening clamps and stay there. The two induction hardening plates 29 of the induction hardening clamps heat the surface of the agricultural machinery blades 11 to about 900 degrees Celsius, so that the surface of the agricultural machinery blades 11 becomes brittle and hard. After heating, the agricultural machinery blades 11 are rotated by the blade turntable 9 and transferred to the next station. The pick-up component picks up the agricultural machinery blades 11 and rotates the picked-up agricultural machinery blades 11 by 90 degrees to prepare for oil quenching.

[0058] A slave gear 6 is fixedly installed on the outer wall of the rotating shaft 7, and a servo motor 4 is fixedly installed on the outer wall of the support column 3. The servo motor 4 has an output shaft extending upward, and a drive gear 5 is fixedly installed at the top of the output shaft of the servo motor 4. The drive gear 5 is meshed with the slave gear 6.

[0059] The blade turntable 9 rotates at the top of the fixed plate 8 by the servo motor 4 below the fixed plate 8 driving the drive gear 5 to rotate intermittently. During the rotation of the drive gear 5, the slave gear 6 is driven to rotate through gear meshing. The rotation of the slave gear 6 drives the rotating shaft 7 to rotate, and the rotation of the rotating shaft 7 drives all the blade turntables 9 to rotate synchronously.

[0060] The pickup assembly includes a motor support arm 20 fixed to the top of the motor bracket 16. A second pneumatic short cylinder 19 is fixedly installed at the top of the motor support arm 20. A piston rod extends downward from the second pneumatic short cylinder 19. A lifting plate 21 is fixedly installed at the bottom of the piston rod of the second pneumatic short cylinder 19. A first pneumatic long cylinder 18 is fixedly installed at the top of the lifting plate 21. A piston rod extends downward from the first pneumatic long cylinder 18. An ear plate bracket 22 is fixedly installed at the bottom of the piston rod of the first pneumatic long cylinder 18. The ear plate bracket 22 is fixed to the outer wall of the sleeve 26.

[0061] The sleeve 26 is rotatably connected to a downward vertical lifting shaft 23 in the middle. A spline shaft 17 is provided at the top of the lifting shaft 23. An AC asynchronous motor 15 is fixedly installed on the other side of the motor bracket 16. An output shaft extends from the bottom of the AC asynchronous motor 15. A dial wheel 28 is fixedly installed at the bottom of the output shaft of the AC asynchronous motor 15. A spline wheel 27 is slidably connected to the outer wall of the spline shaft 17. The spline wheel 27 is fixed to the top of the grooved wheel 33. The grooved wheel 33 is rotatably connected to the motor bracket 16. The dial wheel 28 and the grooved wheel 33 are intermittently engaged.

[0062] The outer wall of the lifting shaft 23 is symmetrically provided with support arms 34 that match the blade turntables 9 on both sides, and the top of each support arm 34 is provided with a blade-collecting suction cup 13.

[0063] Each of the blade-collecting suction cups 13 is configured as an arc-shaped plate structure, and several electromagnetic relays 14 are fixedly installed at equal intervals at the bottom end of each blade-collecting suction cup 13 with an arc-shaped plate structure.

[0064] The blade turntable 9 has several positioning bosses 32 at its top, which facilitate the installation and positioning of the agricultural machinery blades 11 on the turntable 9. The agricultural machinery blades 11 are fixed at the top of the blade turntable 9 according to their corresponding positions. The rotating shaft 7 rotates intermittently, dragging several agricultural machinery blades 11 on each layer of the blade turntable 9 to rotate synchronously and intermittently. The rotation of the blade turntable 9 drives the agricultural machinery blades 11 to enter the corresponding induction hardening clamps and stay there. The two induction hardening plates 29 of the induction hardening clamps heat the surface of the agricultural machinery blades 11 to about 900 degrees Celsius, so that the surface of the agricultural machinery blades 11 becomes brittle and hard. After heating, the agricultural machinery blades 11 are rotated by the blade turntable 9 and transferred to the next station. The pick-up component picks up the agricultural machinery blades 11 and rotates the picked-up agricultural machinery blades 11 by 90 degrees to prepare for oil quenching.

[0065] The picking component uses support arms 34 on both sides of the lifting shaft 23. One support arm 34 extends into the top of the corresponding blade turntable 9 to pick up the agricultural machinery blade 11, while the other support arm 34 extends into the top of the corresponding guide plate 35 to place the agricultural machinery blade 11 on the guide plate 35. This reduces the time consumed during the transfer of all agricultural machinery blades 11, making the heat treatment efficiency of the metal workpiece provided by the present invention higher. Compared with other heat treatment devices, the heat treatment output is greater at the same time, and the heat treatment production cycle can be shortened by at least one-fifth.

[0066] In this invention, the transfer time of one batch of agricultural machinery blades 11 before oil quenching in the oil tank 25 is used to simultaneously complete the transfer time of another batch of oil-quenched agricultural machinery blades 11 into the top of the guide plate 35, thereby effectively reducing the time consumed in the transfer process of all agricultural machinery blades 11.

[0067] In this invention, the picking component uses support arms 34 on both sides of the lifting shaft 23. One support arm 34 extends into the top of the corresponding blade turntable 9 to pick up the agricultural machinery blade 11, while the other support arm 34 extends into the top of the corresponding guide plate 35 to place the agricultural machinery blade 11 on the guide plate 35. At this time, the piston rod of the second pneumatic short cylinder 19 drives the first pneumatic long cylinder 18 to lift upward by 5 cm. The height of the positioning boss 32 is 4 cm. The piston rod of the second pneumatic short cylinder 19 drives the first pneumatic long cylinder 18 to lift upward by 5 cm. At this time, the first pneumatic long cylinder 18 will drive the sleeve 26 to lift upward. At a height of five centimeters, the spline shaft 17 also slides upward five centimeters within the spline wheel 27. As the sleeve 26 is lifted upward five centimeters, the lifting shaft 23 below the sleeve 26 is simultaneously lifted upward five centimeters. As the lifting shaft 23 is lifted upward five centimeters, the symmetrical support arms 34 on both sides of the lifting shaft 23 and the blade-collecting suction cup 13 at the top of the support arm 34 are simultaneously lifted upward five centimeters. This lifts the heated agricultural machinery blade 11 upward five centimeters, allowing the blade-collecting suction cup 13 to pick up the unheated area of ​​the agricultural machinery blade 11 and slide the agricultural machinery blade 11 off the positioning boss 32.

[0068] At this time, the synchronous and uniform rotation of the AC asynchronous motor 15 drives the dial wheel 28 and the grooved wheel 33 to intermittently mesh. The rotation of the grooved wheel 33 drives the spline wheel 27 to rotate synchronously. The rotation of the spline wheel 27 drives the spline shaft 17 to rotate 90 degrees. After the spline shaft 17 rotates 90 degrees, the piston rod of the first pneumatic cylinder 18 extends downward, causing the lifting shaft 23 to descend and extend into the oil tank 25. All the agricultural machinery blades 11 extending into the oil tank 25 are kept in the quenching oil 24 in the oil tank 25 by the intermittent rotation of the dial wheel 28 and the grooved wheel 33, so that the agricultural machinery blades 11 are fully cooled by the oil. At this time, the piston rod of the first pneumatic cylinder 18 is lifted upward, causing the lifting shaft 23 to rise from the oil tank 25, driving the blades in the oil tank 25 to move upward. All the agricultural machinery blades 11 rise upwards. After rising, the lifting shaft 23 engages again with the grooved wheel 33 via the dial wheel 28, causing the lifting shaft 23 to rotate 90 degrees again. This allows the agricultural machinery blades 11 at the top of one side support arm 34 of the fully oil-cooled lifting shaft 23 to rotate above the guide plate 35. Meanwhile, the blade-collecting suction cup 13 at the top of the other side support arm 34 of the lifting shaft 23 is positioned above the agricultural machinery blades 11 placed on the blade turntable 9. At this time, the piston rod of the second pneumatic short cylinder 19 descends five centimeters, causing the blade-collecting suction cup 13 to press down on the agricultural machinery blades 11. The suction cup 13 is then electromagnetically attracted to the surface of the agricultural machinery blades 11 by several electromagnetic relays 14 at the bottom of the suction cup 13, thus gripping the agricultural machinery blades 11.

[0069] Finally, the piston rod of the second pneumatic short cylinder 19 drives the first pneumatic long cylinder 18 to lift it up by five centimeters. The above steps are repeated in sequence to complete the oil quenching heat treatment of the agricultural machinery blade 11.

[0070] The present invention features a simple transmission structure, stable and durable operation, coordinated movement between structures, smooth connection between structures, and no motion interference. It also offers advantages such as stable operation.

[0071] Each of the induction hardening clips includes two parallel induction hardening plates 29, with a spacing between the two induction hardening plates 29 slightly larger than the thickness of the agricultural machinery blade 11. Each induction hardening plate 29 has an arc-shaped structure, and an induction coil 30 is disposed inside each induction hardening plate 29. A high temperature of 1000 degrees Celsius is generated sequentially through the induction coil 30. A reinforcing rib plate 2 is provided at the bottom of the outer wall of the support column 3 to improve the structural strength of the support column 3.

[0072] The technical advantages of this invention are as follows:

[0073] I. This invention is applicable to mass production in factories. When mass-producing agricultural machinery, workers only need to manually move the agricultural machinery blades 11 for loading. During the intermittent stop time of the blade turntable 9, workers install the blades in batches on the intermittently rotating blade turntable 9 according to predetermined positions. The metal heat treatment device automatically completes the transfer, oil quenching, and collection of each batch of agricultural machinery blades 11, and the operation time is uniform. Multiple agricultural machinery blades 11 can be subjected to the same heat treatment at the same time, effectively controlling the quenching process, quenching time, and operation process of several agricultural machinery blades 11 in the same batch to be the same, so that several agricultural machinery blades 11 in the same batch obtain the same mechanical properties and there is no difference in the quality of inferior products.

[0074] Second, by intermittently rotating the picking component, the picking component rotates at 90 degrees between the guide plate 35 and the blade turntable 9, allowing the picking component to pick up agricultural machinery blades 11 in batches while simultaneously dropping off quenched agricultural machinery blades 11 in batches. This effectively reduces the time consumed during the transfer of agricultural machinery blades 11, making the metal workpiece heat treatment efficiency provided by the present invention higher. Compared with other heat treatment devices, the heat treatment output is greater in the same time, and the heat treatment production cycle can be shortened by at least one-fifth.

[0075] Third, by setting the pickup component on the right side of the induction hardening plate 29, the present invention allows the blade after the induction hardening plate 29 has been heated to be quickly transferred to the quenching oil 24 in the oil tank 25 for oil cooling and heat dissipation, thereby reducing the time the blade is exposed to air after heating and reducing the time the blade is cooled by air after heating, thus reducing the impact of air cooling on the internal structure of the blade.

[0076] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A metal heat treatment process, characterized in that, The metal heat treatment process mainly includes the following steps: S1, Multi-functional blade mounting: The agricultural machinery blades that need to be heat-treated are placed and installed on the intermittently rotating blade turntable. Each agricultural machinery blade is installed and positioned by several sets of positioning bosses set at the top of each blade turntable near the edge of the blade turntable, so that the blade is placed at the corresponding position at the top of the blade turntable. S2. High-temperature heating of the blade: The agricultural machinery blades placed on the blade turntable are rotated intermittently. The rotation of the blade turntable drives the agricultural machinery blades into the corresponding induction hardening clamps and stays there. The two induction hardening plates of the induction hardening clamps heat the surface of the agricultural machinery blades to about 900 degrees Celsius, with the temperature not exceeding 100 degrees Celsius. S3. Blade transfer and rapid pickup: The agricultural machinery blade heated to about 900 degrees Celsius in step S2 is transferred. The heated agricultural machinery blade is transferred to the next station by the intermittent rotation of the blade turntable. The agricultural machinery blade is picked up by the pickup component and rotated 90 degrees by the pickup component to prepare for oil quenching of the agricultural machinery blade. S4. The blades are moved down in batches and soaked; After the pick-up component in step S2 picks up several agricultural machinery blades from the blade turntables on both sides, rotates them 90 degrees and moves them down into the oil tank quickly through the pick-up component. The agricultural machinery blades that have been moved down into the oil tank stay in the oil tank for 1-5 seconds and the surface of the agricultural machinery blades is rapidly quenched and cooled by the quenching oil in the oil tank. S5. The blades are lifted and transferred from the oil tank in batches: In step S4, the picking component lifts several agricultural machinery blades that have been rapidly quenched and cooled up from the oil tank, rotates the lifted agricultural machinery blades 90 degrees, lowers them by 5 cm, and puts the rapidly quenched and cooled agricultural machinery blades down onto the guide plate, and then drops them down into the blade collection box of agricultural machinery blades through the guide plate. S6. Picking up while putting down: In step 5, while the picking component puts the agricultural machinery blades down onto the guide plate, the other end of the picking component picks up the blades that have not been quenched and cooled. At this time, the picking component is rotated 90 degrees and steps S3-S5 are repeated to perform rapid heat treatment on several batches of agricultural machinery blades.

2. The metal heat treatment process according to claim 1, characterized in that: The steps S1-S5 described above are mainly completed by a metal heat treatment device. The metal heat treatment device includes a fixed base fixed to the ground, an oil tank fixedly installed in the middle of the fixed base, quenching oil placed in the oil tank, a support column upright at the top of the fixed base, a rotating shaft rotatably connected to the top of the support column, and several layers of blade turntables fixedly installed on the outer wall of the rotating shaft. Agricultural machinery blades are installed at equal intervals around the top of each layer of the turntable. The rotating shaft extends upward through the fixing plate, and the fixing plate is fixed to the top of the fixing foot; Each blade turntable is configured as a disc structure. At the top of each blade turntable, a number of positioning bosses are fixedly arranged in groups at equal intervals around the circumference. The agricultural machinery blades are installed at equal intervals on the edge of the blade turntable through each group of positioning bosses at the top of the blade turntable. A support shaft is fixedly installed on the edge of the blade turntable. An induction hardening clamp with the same number of blade turntable layers is fixed on the outer wall of the support shaft. A motor bracket is fixedly installed at the top of the oil tank, and a liftable and rotatable pickup component is installed at the top of the motor bracket. The pickup component picks up the agricultural machinery blades on the blade turntables on both sides of the oil tank and lifts and lowers them into the quenching oil in the oil tank for quenching. A blade collection box is placed on the side of the oil tank. Several guide plates are fixedly placed on the top of the blade collection box, and the top surface of several of the guide plates is at the same height as the blade turntable of each layer.

3. The metal heat treatment process according to claim 2, characterized in that: A slave gear is fixedly installed on the outer wall of the rotating shaft, and a servo motor is fixedly installed on the outer wall of the support column. The servo motor has an output shaft extending upward, and a drive gear is fixedly installed at the top of the output shaft of the servo motor. The drive gear is meshed with the slave gear.

4. The metal heat treatment process according to claim 2, characterized in that: The pickup assembly includes a motor support arm fixed to the top of the motor bracket, a second pneumatic short cylinder fixedly installed at the top of the motor support arm, a lifting plate fixedly installed at the bottom of the piston rod of the second pneumatic short cylinder, a first pneumatic long cylinder fixedly installed at the top of the lifting plate, an ear plate bracket fixedly installed at the bottom of the piston rod of the first pneumatic long cylinder, and the ear plate bracket fixed to the outer wall of the sleeve. The sleeve is rotatably connected to a downward vertical lifting shaft in the middle. A spline shaft is provided at the top of the lifting shaft. An AC asynchronous motor is fixedly installed on the other side of the motor bracket. An output shaft extends from the bottom of the AC asynchronous motor. A dial wheel is fixedly installed at the bottom of the output shaft of the AC asynchronous motor. A spline wheel is slidably connected to the outer wall of the spline shaft. The spline wheel is fixed to the top of the grooved wheel. The grooved wheel is rotatably connected to the motor bracket. The dial wheel and the grooved wheel are intermittently engaged.

5. A metal heat treatment process according to claim 4, characterized in that: The outer wall of the lifting shaft is symmetrically provided with support arms that match the blade turntables on both sides, and the top of each support arm is provided with a blade-collecting suction cup.

6. The metal heat treatment process according to claim 5, characterized in that: Each of the aforementioned blade-collecting suction cups is configured as an arc-shaped plate structure, and several electromagnetic relays are fixedly installed at equal intervals at the bottom end of each blade-collecting suction cup with an arc-shaped plate structure.

7. A metal heat treatment process according to claim 2, characterized in that: Each of the induction hardening clips includes two parallel induction hardening plates, with a spacing between the two induction hardening plates slightly larger than the thickness of the agricultural machinery blade, and each induction hardening plate is an arc-shaped plate structure, with an induction coil disposed inside each induction hardening plate.

8. A metal heat treatment process according to claim 2, characterized in that: The bottom of the outer wall of the support column is provided with a reinforcing rib plate.

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