A multi-zone annealing furnace and method of use thereof

Abstract

The present application relates to annealing furnace loading parts technical field, especially in kind, a kind of multilayer annealing furnace and its using method, including annealing furnace main body, support vertical beam frame, bottom closed platform, electric heat mask and workpiece placing plate, the outside of bottom closed platform is also fixedly connected with external support, the outside of bottom closed platform and external support is provided with supporting assembly, supporting assembly includes installation platform and moving plate, the side away from annealing furnace main body of moving plate outside is provided with lower notch, the inside of lower notch is provided with control assembly, the outside of bottom closed platform is provided with automatic switch assembly for driving rotating wire drum to rotate, the present application is placed by setting supporting assembly to workpiece, cooperatively set control assembly and automatic switch assembly, when workpiece moves, by two side baffles vertical to workpiece The protection of moving direction avoids the phenomenon that workpiece is separated from the outside of workpiece placing plate, effectively protects the stable loading work of workpiece on annealing processing.

Description

Technical Field

[0001] This invention relates to the technical field of charging parts for annealing furnaces, and in particular to a multi-layer annealing furnace and its method of use. Background Technology

[0002] Annealing is a common process in machining. To achieve certain properties, such as reducing the hardness of a workpiece while increasing its plasticity, the workpiece needs to be heated, held for a period of time, and then slowly cooled to obtain this property. Annealing furnaces are indispensable processing equipment in annealing. Annealing furnaces use electric heating wires to perform shielded annealing on workpieces. After the workpiece is placed on the support table, a belt-driven motor moves the workpiece under the shield for closed annealing. Since the workpieces are piled on the support table, moving the support table can easily cause the workpieces to sway in the direction of movement, causing the workpieces located at the corners of the support table to tip over and detach from the support table, thus affecting the stable annealing process of the workpieces. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, the present invention provides a multi-layer annealing furnace and its usage method.

[0004] To solve the above technical problems, the present invention provides the following technical solution: a multi-layer annealing furnace, comprising an annealing furnace body, a supporting vertical beam frame, a bottom enclosed platform, an electric heating shield, and a workpiece placement plate. The supporting vertical beam frame is fixedly connected to the lower part of the annealing furnace body. The electric heating shield is connected to the interior of the annealing furnace body via an electrically controlled drive rod. The bottom enclosed platform is fixedly connected to the interior of the supporting vertical beam frame. A drive motor for driving is fixedly connected to the exterior of the bottom enclosed platform. An external support is also fixedly connected to the exterior of the bottom enclosed platform. A bottom support plate for support is fixedly connected to the lower part of the exterior of the external support. A rotating roller is rotatably connected to the exterior of the external support. A transmission belt is sleeved around the rotating roller and the output shaft of the drive motor. The transmission belt is driven by the drive motor to rotate outside the external support. A support assembly for placing workpieces is provided outside the external support and the bottom enclosed platform. The support assembly includes a mounting platform and a movable plate. The movable plate is movably connected to the exterior of the external support and the bottom enclosed platform. The movable plate is fixedly connected to the outer surface of the transmission belt. The movable plate is driven by the transmission belt to rotate outside the external support and the bottom enclosed platform. The outer side of the enclosed platform moves laterally. The mounting platform is fixedly connected to the outside of the moving plate. The workpiece placement plate is set outside the mounting platform. Outer slots are opened on both sides of the outer side of the mounting platform. A side baffle is installed inside each outer slot. A groove is opened on the side of the two side baffles facing each other. A lower slot is opened on the outer side of the moving plate away from the annealing furnace body. A control component is installed inside the lower slot to control the rotation of the two side baffles within the two outer slots. The moving plate is initially placed outside the external support, and simultaneously... The face baffle rotates inside the outer slot and is placed parallel to the external support. Two short plates are provided on both sides of the outer side baffle. The two short plates are fixedly connected to the outside of the mounting platform. A rotating shaft is fixedly connected to the opposite side of the two short plates. The rotating shaft is movably sleeved inside the side baffle. The side baffle rotates inside the outer slot through the two short plates. A cover plate is fixedly connected inside the wire slot. The cover plate has a slot for guiding the placement of the pull rope. A clamping plate is fixedly connected inside each outer slot to limit the rotation range of the side baffle.

[0005] As a preferred embodiment of the present invention, the control component includes a pull rope and a rotating drum. The pull rope is fixedly connected inside the rotating drum, and both ends of the pull rope are respectively wound around both sides inside the rotating drum. The two ends of the pull rope respectively movably pass through both sides inside the lower slot and extend to the inside of the two outer slots. The two ends of the pull rope are respectively fixedly connected inside the two slots. The rotation of the rotating drum causes the pull rope to wind and contract inside the rotating drum. The contraction and tightening of the two ends of the pull rope causes the two side baffles to rotate inside the two outer slots. A drive shaft is rotatably connected inside the rotating drum. The end of the drive shaft away from the rotating drum is fixedly connected to the inside of the lower slot. A guide slider is fixedly connected to the end of the rotating drum away from the drive shaft. Both sides of the outside of the rotating drum are fixedly fitted with teeth.

[0006] As a preferred embodiment of the present invention, an automatic switch assembly for driving the rotating drum to rotate is provided on the outside of the bottom closed platform. The automatic switch assembly includes a guide plate, which is fixedly connected to the outside of the bottom closed platform. Transmission gear plates are fixedly connected to both sides of the guide plate. Moving the guide plate drives the rotating drum to move, causing two sleeve teeth to mesh with the two transmission gear plates. The meshing of the sleeve teeth drives the rotating drum to rotate, causing the pull rope to contract or relax. A connecting plate is fixedly connected to the outside of the guide plate. A crossbeam plate is fixedly connected to the end of the connecting plate away from the guide plate. The external guide slot is adapted to the height of the guide slider. The automatic switch assembly also includes two limit plates, two limit slots and a stop beam. The two limit slots are respectively opened on the side of the moving plate away from the main body of the annealing furnace. The two limit plates are respectively fixedly connected to the two sides of the outside of the guide plate, and the two limit plates are respectively movably connected to the inside of the two limit slots. The limit plates and limit slots are used to assist the moving plate to move laterally stably outside the external support and the bottom closed platform. The stop beam is fixedly connected to the outside of the supporting vertical beam frame. The stop beam is used to limit the maximum distance of movement of the moving plate.

[0007] As a preferred embodiment of the present invention, positioning ear plates are fixedly connected to both sides of the workpiece placement plate. Positioning components for facilitating disassembly and assembly are provided on both sides of the positioning ear plates. The positioning components include two straight rods, both of which are fixedly connected to the outside of the mounting platform and are movably connected to both sides of the positioning ear plates. The workpiece placement plate is stably placed outside the mounting platform by means of the two positioning ear plates.

[0008] As a preferred embodiment of the present invention, the positioning assembly further includes a screw, which is fixedly connected to the outside of the mounting platform. A positioning sleeve is threadedly connected to the outside of the screw, and the positioning sleeve is located outside the workpiece placement plate. The number of workpiece placement plates is set to several, and the several workpiece placement plates are hung on the outside of two straight rods through positioning ear plates and the workpiece placement plates are quickly positioned outside the mounting platform by the positioning sleeve.

[0009] A method for using a multi-layer annealing furnace includes the following steps:

[0010] The first step involves placing the workpiece outside the workpiece placement plate, starting the drive motor to rotate its output shaft, which in turn drives the transmission belt and moves the moving plate towards the bottom closed platform. The movement of the moving plate causes the rotating drum to contact the two sleeve teeth with the two transmission gear plates. As the moving plate continues to move towards the bottom closed platform, the sleeve teeth mesh with the transmission gear plates, and the rotation of the sleeve teeth causes the rotating drum to rotate, causing the pull rope to wind and contract inside the rotating drum. The contraction of the two ends of the pull rope pulls the two side baffles towards each other inside the two outer slots, causing the two side baffles to rotate 90 degrees around the pivot point. The two side baffles rotate to a vertical position outside the workpiece placement plate, thus protecting the moving workpiece.

[0011] The second step involves rotating the spool synchronously to drive the guide slider to rotate 90 degrees. After rotating 90 degrees, the guide slider moves towards the bottom closed platform in conjunction with the rotation of the spool. The guide slider is driven by the spool to move into the interior of the guide slot. The guide slider limits the rotation angle of the spool and keeps the two side baffles vertical outside the mounting platform and above the bottom closed platform. By keeping the two side baffles vertical to protect the workpiece in the direction of movement when the workpiece moves, the phenomenon of the workpiece detaching from the outside of the workpiece placement plate is avoided, effectively protecting the stable loading and operation of the workpiece during annealing.

[0012] The third step involves moving the workpiece from the workpiece placement plate to above the bottom closed platform. The electric heating shield is then moved downwards inside the annealing furnace body and fitted over the outside of the moving plate, sealing the moving plate below the furnace body. After the electric heating shield anneals the workpiece located outside the workpiece placement plate, it is retracted into the furnace body. The drive motor is restarted, moving the moving plate and mounting platform to move the workpiece away from the bottom closed platform. During this movement, the moving plate rotates the spool and moves the guide slider inside the guide slot. The guide slider vertically confines the two side baffles outside the workpiece placement plate, protecting the workpiece. When the guide slider disengages from the guide slot, the sleeve re-engages with the transmission gear plate, causing the pull rope to loosen inside the rotating spool. At this point, the two side baffles, under gravity, rotate and unfold around the axis of rotation, allowing the user to quickly remove and unload the workpiece.

[0013] Compared with the prior art, the beneficial effects that this invention can achieve are:

[0014] 1. By setting up a support component to place the workpiece, and with the set up control component and automatic switch component, the two side baffles vertically protect the workpiece in the direction of movement when it moves, avoiding the phenomenon of the workpiece detaching from the outside of the workpiece placement plate, and effectively protecting the workpiece during stable loading and operation in annealing.

[0015] 2. By moving the new workpiece placement plate and the positioning ear plate onto the outside of the two straight rods, the new workpiece placement plate is placed above the bottom workpiece placement plate. At this time, by turning the positioning sleeve outside the screw, the positioning sleeve spirals upward and moves to the outside of the new workpiece placement plate. The positioning sleeve quickly positions and supports the newly placed workpiece placement plate, so that multiple workpiece placement plates are set up in a multi-layered manner outside the mounting table, thereby increasing the number of workpiece placement stations through a multi-layered arrangement.

[0016] 3. By moving the workpiece placement plate to above the bottom closed platform, the electric heating shield is moved downward inside the annealing furnace body and fitted onto the outside of the moving plate. The moving plate is then closed below the annealing furnace body. After the electric heating shield anneals the workpiece located outside the workpiece placement plate, it is retracted into the annealing furnace body. The drive motor is restarted, driving the moving plate and mounting platform to move the workpiece away from the bottom closed platform. During the movement of the workpiece, the moving plate drives the rotating drum and moves the guide slider inside the guide slot. The guide slider limits the two side baffles to a vertical position outside the workpiece placement plate to protect the workpiece. When the guide slider disengages from the inside of the guide slot, the sleeve tooth re-engages with the transmission tooth plate and drives the pull rope to loosen inside the rotating drum. At this time, the two side baffles are rotated and unfolded away from the axis of rotation under gravity, thus facilitating the user to quickly remove and unload the workpiece. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the workpiece placement plate of the present invention;

[0019] Figure 3 This is a schematic diagram of the external support structure of the present invention;

[0020] Figure 4 This is a schematic diagram of the structure of the electric heating shield of the present invention;

[0021] Figure 5 This is a schematic diagram of the bottom sealing platform of the present invention;

[0022] Figure 6 This is a schematic diagram of the mounting platform of the present invention;

[0023] Figure 7 This is a schematic diagram of the crossbeam plate of the present invention;

[0024] Figure 8 This is a schematic diagram of the rotating spool structure of the present invention;

[0025] Figure 9 For the present invention Figure 7 A magnified schematic diagram of the structure at point A in the middle.

[0026] The components include: 10. Annealing furnace body; 11. Supporting vertical beam frame; 12. External support; 13. Bottom support plate; 14. Bottom enclosed platform; 15. Drive motor; 16. Transmission belt; 17. Rotating roller; 18. Electric heating shield; 19. Workpiece placement plate; 191. Positioning ear plate; 20. Limiting plate; 21. Limiting slot; 22. Transmission gear plate; 23. Guide plate; 24. Crossbeam plate; 25. Guide groove. 26. Connecting plate; 27. Stop beam; 30. Side baffle; 31. Mounting platform; 32. Outer groove; 33. Clamping plate; 34. Rotating shaft; 35. Short plate; 36. Wire groove; 37. Cover plate; 38. Moving plate; 39. Lower groove; 40. Pull rope; 41. Rotating wire drum; 42. Drive shaft; 43. Sleeve tooth; 44. Guide slider; 50. Screw; 51. Positioning sleeve; 52. Straight rod. Detailed Implementation

[0027] To make the technical means, creative features, and achieved objectives and effects of this invention easier to understand, the invention is further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of this invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this invention. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified.

[0028] Example: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6The multi-layer annealing furnace shown includes an annealing furnace body 10, a supporting vertical beam frame 11, a bottom enclosed platform 14, an electric heating shield 18, and a workpiece placement plate 19. The supporting vertical beam frame 11 is fixedly connected to the lower part of the annealing furnace body 10. The electric heating shield 18 is connected to the interior of the annealing furnace body 10 via an electrically controlled drive rod. The bottom enclosed platform 14 is fixedly connected to the interior of the supporting vertical beam frame 11. A drive motor 15 for driving is fixedly connected to the exterior of the bottom enclosed platform 14. An external support 12 is also fixedly connected to the exterior of the bottom enclosed platform 14. A bottom support plate 13 for support is fixedly connected to the lower part of the exterior of the external support 12. A rotating roller 17 is rotatably connected to the outside of the frame 12. A transmission belt 16 is sleeved around the output shaft of the drive motor 15 and the rotating roller 17. The transmission belt 16 is driven by the drive motor 15 to rotate outside the outer support 12. A support assembly for placing workpieces is provided outside the outer support 12 and the bottom closed platform 14. The support assembly includes a mounting platform 31 and a movable plate 38. The movable plate 38 is movably connected to the outside of the outer support 12 and the bottom closed platform 14. The movable plate 38 is fixedly connected to the outer surface of the transmission belt 16. The movable plate 38 is driven by the transmission belt 16 to move laterally outside the outer support 12 and the bottom closed platform 14. The mounting platform 31 is fixedly connected to the outside of the movable plate 38. The workpiece placement plate 19 is set outside the mounting platform 31. External slots 32 are opened on both sides of the mounting platform 31. A side baffle 30 is installed inside each external slot 32. A groove 36 is opened on the opposite side of the two side baffles 30. A lower slot 39 is opened on the side of the movable plate 38 away from the annealing furnace body 10. A control component is installed inside the lower slot 39 to control the rotation of the two side baffles 30 within the two external slots 32. The movable plate 38 is initially placed outside the external support 12, while the two side baffles 30 are in the external slots. The internal rotation of the side baffle 30 is parallel to the external support 12. Two short plates 35 are provided on both sides of the external side baffle 30. The two short plates 35 are fixedly connected to the outside of the mounting platform 31. A rotating shaft 34 is fixedly connected to the opposite side of the two short plates 35. The rotating shaft 34 is movably sleeved inside the side baffle 30. The side baffle 30 rotates inside the outer slot 32 through the two short plates 35. A cover plate 37 is fixedly connected inside the wire slot 36. The outside of the cover plate 37 is provided with a slot for guiding the placement of the pull rope 40. A clamping plate 33 is fixedly connected inside each outer slot 32 to limit the rotation range of the side baffle 30.

[0029] See Figure 1 , Figure 6 , Figure 8 and Figure 9The control component includes a pull rope 40 and a rotating drum 41. The pull rope 40 is fixedly connected inside the rotating drum 41, and both ends of the pull rope 40 are wound around the two sides inside the rotating drum 41. The two ends of the pull rope 40 move through the two sides inside the lower slot 39 and extend into the two outer slots 32. The two ends of the pull rope 40 are fixedly connected inside the two wire slots 36. The rotation of the rotating drum 41 causes the pull rope 40 to wind and contract inside the rotating drum 41. The contraction and tightening of the two ends of the pull rope 40 causes the two side baffles 30 to rotate inside the two outer slots 32. The rotating drum 41 is rotatably connected to a drive shaft 42. The end of the drive shaft 42 away from the rotating drum 41 is fixedly connected to the inside of the lower slot 39. The end of the rotating drum 41 away from the drive shaft 42 is fixedly connected to a guide slider 44. Both sides of the rotating drum 41 are fixedly fitted with sleeve teeth 43.

[0030] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 9 An automatic switch assembly for driving the rotating drum 41 to rotate is provided on the outside of the bottom closed platform 14. The automatic switch assembly includes a guide plate 23, which is fixedly connected to the outside of the bottom closed platform 14. Transmission gear plates 22 are fixedly connected to both sides of the outside of the guide plate 23. The moving plate 38 moves to drive the rotating drum 41 to move and cause two sleeve teeth 43 to mesh with the two transmission gear plates 22. The meshing transmission of the sleeve teeth 43 drives the rotating drum 41 to rotate and causes the pull rope 40 to contract or relax. A connecting plate 26 is fixedly connected to the outside of the guide plate 23. A crossbeam plate 24 is fixedly connected to the end of the connecting plate 26 away from the guide plate 23. The outside of the crossbeam plate 24 has an opening that connects with the guide plate 23. The guide slot 25, which is adapted to the height of the slider 44, and the automatic switch assembly also include two limiting plates 20, two limiting slots 21 and a baffle beam 27. The two limiting slots 21 are respectively opened on the side of the moving plate 38 away from the annealing furnace body 10. The two limiting plates 20 are respectively fixedly connected to the two sides of the guide plate 23, and the two limiting plates 20 are respectively movably connected to the inside of the two limiting slots 21. The limiting plates 20 and the limiting slots 21 are used to assist the moving plate 38 to move laterally stably outside the external support 12 and the bottom closed platform 14. The baffle beam 27 is fixedly connected to the outside of the supporting vertical beam frame 11. The baffle beam 27 is used to limit the maximum distance of movement of the moving plate 38.

[0031] See Figure 1Positioning ear plates 191 are fixedly connected to both sides of the workpiece placement plate 19. Positioning components for facilitating assembly and disassembly are provided on both sides of the positioning ear plates 191. Each positioning component includes two straight rods 52, both fixedly connected to the outside of the mounting platform 31, and movably connected to both sides of the positioning ear plates 191. The workpiece placement plate 19 is stably placed outside the mounting platform 31 via the two positioning ear plates 191. The positioning component also includes a screw 50, which is fixedly connected to the outside of the mounting platform 31. The external thread of 50 is connected to a positioning sleeve 51, which is located outside the workpiece placement plate 19. The positioning assembly also includes a screw 50, which is fixedly connected to the outside of the mounting platform 31. The external thread of the screw 50 is connected to the positioning sleeve 51, which is located outside the workpiece placement plate 19. The number of workpiece placement plates 19 is set to several. Several workpiece placement plates 19 are hung on the outside of two straight rods 52 through positioning ear plates 191 and the workpiece placement plates 19 are quickly positioned outside the mounting platform 31 through the positioning sleeve 51.

[0032] By moving the new workpiece placement plate 19 and the positioning ear plate 191 into the outside of the two straight rods 52, the new workpiece placement plate 19 is placed above the bottom workpiece placement plate 19. At this time, by turning the positioning sleeve 51 outside the screw 50, the positioning sleeve 51 spirals upward outside the screw 50 and moves to the outside of the new workpiece placement plate 19. The positioning sleeve 51 quickly positions and supports the newly placed workpiece placement plate 19, so that multiple workpiece placement plates 19 are arranged in a multi-layered manner outside the mounting table 31, thereby increasing the number of workpiece placement stations in a multi-layered manner.

[0033] A method for using a multi-layer annealing furnace includes the following steps:

[0034] The first step involves placing the workpiece outside the workpiece placement plate 19, starting the drive motor 15 to rotate its output shaft, which drives the transmission belt 16 and moves the moving plate 38 toward the bottom closed platform 14. The movement of the moving plate 38 drives the rotating drum 41 to make the two sleeve teeth 43 contact the two transmission tooth plates 22. The continuous movement of the moving plate 38 toward the bottom closed platform 14 drives the sleeve teeth 43 to mesh with the transmission tooth plates 22. The rotation of the sleeve teeth 43 drives the rotating drum 41 and causes the pull rope 40 to wind and contract inside the rotating drum 41. The contraction of the two ends of the pull rope 40 pulls the two side baffles 30 toward each other inside the two outer slots 32, causing the two side baffles 30 to rotate 90 degrees toward each other inside the two outer slots 32 around the rotating shaft 34. The two side baffles 30 rotate to a vertical position outside the workpiece placement plate 19, and the two side baffles 30 protect the moving workpiece.

[0035] The second step involves rotating the rotating drum 41 synchronously driving the guide slider 44 to rotate 90 degrees. After rotating 90 degrees, the guide slider 44 moves in coordination with the rotating drum 41 towards the bottom closed platform 14. The guide slider 44 is driven by the rotating drum 41 to move into the interior of the guide slot 25. The guide slider 44 limits the rotation angle of the rotating drum 41 and keeps the two side baffles 30 vertical outside the mounting platform 31 and above the bottom closed platform 14. By keeping the two side baffles 30 vertically protecting the workpiece in the direction of movement when the workpiece moves, the phenomenon of the workpiece detaching from the workpiece placement plate 19 is avoided, effectively protecting the stable loading and operation of the workpiece in the annealing process.

[0036] The third step involves moving the workpiece from the workpiece placement plate 19 to above the bottom closed platform 14. The electric heating shield 18 is then moved downwards inside the annealing furnace body 10 and fitted over the moving plate 38, sealing the moving plate 38 below the annealing furnace body 10. After the electric heating shield 18 anneals the workpiece located outside the workpiece placement plate 19, it is retracted into the annealing furnace body 10. The drive motor 15 is then restarted, driving the moving plate 38 and mounting platform 31 to move the workpiece away from the bottom closed platform 14. During the movement of the workpiece, the moving plate 38... The moving plate 38 drives the rotating drum 41 and moves the guide slider 44 inside the guide slot 25. The guide slider 44 limits the two side baffles 30 to a vertical position outside the workpiece placement plate 19 to protect the workpiece. When the guide slider 44 leaves the inside of the guide slot 25, the sleeve tooth 43 re-engages with the transmission tooth plate 22 and drives the pull rope 40 to relax inside the rotating drum 41. At this time, the two side baffles 30 are rotated and unfolded in a direction away from the rotating shaft 34 under the force of gravity, so as to facilitate the user to quickly take out and unload the workpiece.

[0037] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A multi-layer annealing furnace, comprising an annealing furnace body (10), a supporting vertical beam frame (11), a bottom enclosed platform (14), an electric heating shield (18), and a workpiece placement plate (19), wherein the supporting vertical beam frame (11) is fixedly connected to the lower part of the annealing furnace body (10), the electric heating shield (18) is connected to the interior of the annealing furnace body (10) via an electrically controlled drive rod, and the bottom enclosed platform (14) is fixedly connected to the interior of the supporting vertical beam frame (11), characterized in that, The bottom closed platform (14) is fixedly connected to a drive motor (15) for driving. The bottom closed platform (14) is also fixedly connected to an external bracket (12). The bottom support plate (13) for support is fixedly connected to the lower part of the external bracket (12). The external bracket (12) is rotatably connected to a rotating roller (17). The rotating roller (17) and the output shaft of the drive motor (15) are fitted with a transmission belt (16). The transmission belt (16) is driven by the drive motor (15) to rotate outside the external bracket (12). The external bracket (12) and the bottom closed platform (14) are provided with a support component for placing the workpiece. The supporting assembly includes a mounting platform (31) and a movable plate (38). The movable plate (38) is movably connected to the outside of the outer bracket (12) and the bottom closed platform (14). The movable plate (38) is fixedly connected to the outer surface of the transmission belt (16). The movable plate (38) is driven by the transmission belt (16) to move laterally outside the outer bracket (12) and the bottom closed platform (14). The mounting platform (31) is fixedly connected to the outside of the movable plate (38). The workpiece placement plate (19) is set on the mounting platform. (31) On the outside of the mounting platform (31), there are two outer slots (32) on both sides. Each outer slot (32) is equipped with a side baffle (30). The two side baffles (30) are equipped with a wire slot (36) on the opposite side. The moving plate (38) is equipped with a lower slot (39) on the side away from the annealing furnace body (10). The lower slot (39) is equipped with a control component for controlling the two side baffles (30) to rotate inside the two outer slots (32). The control assembly includes a pull rope (40) and a rotating spool (41). The pull rope (40) is fixedly connected inside the rotating spool (41), and the two ends of the pull rope (40) are respectively wrapped around the two sides inside the rotating spool (41). The two ends of the pull rope (40) respectively move through the two sides inside the lower slot (39) and extend to the inside of the two outer slots (32). The two ends of the pull rope (40) are respectively fixedly connected inside the two wire slots (36). The rotating spool (41) is rotatably connected to a drive shaft (42). The end of the drive shaft (42) away from the rotating spool (41) is fixedly connected to the inside of the lower slot (39). The end of the rotating spool (41) away from the drive shaft (42) is fixedly connected to a guide slider (44). The two sides of the rotating spool (41) are fixedly fitted with teeth (43). An automatic switch assembly for driving the rotating drum (41) to rotate is provided on the outside of the bottom closed platform (14). The automatic switch assembly includes a guide plate (23), which is fixedly connected to the outside of the bottom closed platform (14). Transmission gear plates (22) are fixedly connected to both sides of the outside of the guide plate (23). The moving plate (38) moves to drive the rotating drum (41) to move and make the two sleeve teeth (43) mesh with the two transmission gear plates (22). The meshing transmission of the sleeve teeth (43) drives the rotating drum (41) to rotate and makes the pull rope (40) contract or relax. A connecting plate (26) is fixedly connected to the outside of the guide plate (23). A crossbeam plate (24) is fixedly connected to the end of the connecting plate (26) away from the guide plate (23). A guide slot (25) adapted to the height of the guide slider (44) is opened on the outside of the crossbeam plate (24).

2. The multi-layer annealing furnace according to claim 1, characterized in that, Two short plates (35) are provided on both sides of the outside of each side baffle (30). The two short plates (35) are fixedly connected to the outside of the mounting platform (31). A rotating shaft (34) is fixedly connected to the opposite side of the two short plates (35). The rotating shaft (34) is movably sleeved inside the side baffle (30). The side baffle (30) rotates inside the outer groove (32) through the two short plates (35).

3. A multi-layer annealing furnace according to claim 2, characterized in that, Both of the wire slots (36) are fixedly connected to a cover plate (37). The cover plate (37) has a slot on the outside for guiding the pull rope (40) to be placed. Each outer slot (32) is fixedly connected to a clamping plate (33) for limiting the rotation range of the side baffle (30).

4. A multi-layer annealing furnace according to claim 3, characterized in that, The automatic switch assembly also includes two limiting plates (20), two limiting slots (21) and a baffle beam (27). The two limiting slots (21) are respectively opened on the side of the moving plate (38) away from the annealing furnace body (10). The two limiting plates (20) are respectively fixedly connected to the two sides of the guide plate (23), and the two limiting plates (20) are respectively movably connected to the inside of the two limiting slots (21).

5. A multi-layer annealing furnace according to claim 1, characterized in that, Positioning ear plates (191) are fixedly connected to both sides of the workpiece placement plate (19). Positioning assemblies for facilitating disassembly and assembly are provided on both sides of the positioning ear plates (191). The positioning assemblies include two straight rods (52). The two straight rods (52) are fixedly connected to the outside of the mounting platform (31), and the two straight rods (52) are movably connected to both sides of the outside of the positioning ear plates (191).

6. A multi-layer annealing furnace according to claim 5, characterized in that, The positioning assembly also includes a screw (50), which is fixedly connected to the outside of the mounting platform (31). The screw (50) is threadedly connected to a positioning sleeve (51), which is located outside the workpiece placement plate (19).

7. A multi-layer annealing furnace according to claim 6, characterized in that, The number of workpiece placement plates (19) is set to several. Several workpiece placement plates (19) are hung on the outside of two straight rods (52) by positioning ear plates (191) and the workpiece placement plates (19) are quickly positioned on the outside of the mounting table (31) by positioning screw sleeves (51).

8. The method of using a multi-layer annealing furnace according to claim 4, characterized in that, The process includes the following steps: The first step involves placing the workpiece outside the workpiece placement plate (19), starting the drive motor (15) to rotate its output shaft, which drives the transmission belt (16) and moves the moving plate (38) towards the bottom closed platform (14). The movement of the moving plate (38) drives the rotating spool (41) to make the two sleeve teeth (43) contact the two transmission gear plates (22). The continuous movement of the moving plate (38) towards the bottom closed platform (14) drives the sleeve teeth (43) to mesh with the transmission gear plates (22) for transmission. 3) Rotating the spool (41) causes the pull rope (40) to wind and contract inside the spool (41). The contraction of the two ends of the pull rope (40) pulls the two side baffles (30) towards each other inside the two outer slots (32), causing the two side baffles (30) to rotate 90 degrees towards each other inside the two outer slots (32) with the pivot (34) as the center. The two side baffles (30) rotate to a vertical position outside the workpiece placement plate (19), and the two side baffles (30) protect the moving workpiece. The second step is to rotate the guide slider (44) by rotating the spool (41) synchronously. After rotating the guide slider (44) by 90 degrees, it moves in the direction of the bottom closed platform (14) in coordination with the rotation of the spool (41). The guide slider (44) is driven by the rotation of the spool (41) to move into the interior of the guide slot (25). The guide slider (44) limits the rotation angle of the spool (41) and keeps the two side baffles (30) vertical outside the mounting platform (31) and enters the top of the bottom closed platform (14). The third step involves moving the workpiece to the top of the bottom closed platform (14) by using the workpiece placement plate (19). The electric heating shield (18) is then moved downwards inside the annealing furnace body (10) and placed over the moving plate (38) to seal it below the annealing furnace body (10). After the electric heating shield (18) anneals the workpiece located outside the workpiece placement plate (19), the electric heating shield (18) is retracted into the annealing furnace body (10). The drive motor (15) is then restarted to move the moving plate (38) and the mounting platform (31) away from the bottom closed platform (14). During the movement of the workpiece, the moving plate (38) drives the rotating drum (41) and causes the guide slider (44) to move inside the guide groove (25). The guide slider (44) limits the two side baffles (30) to a vertical position outside the workpiece placement plate (19) to protect the workpiece. When the guide slider (44) leaves the inside of the guide groove (25), the sleeve tooth (43) re-engages with the transmission tooth plate (22) and drives the pull rope (40) to relax inside the rotating drum (41). At this time, the two side baffles (30) are rotated and unfolded in the direction away from the rotating shaft (34) by gravity.

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