A heat treatment device based on metal workpiece machining

Abstract

The application provides a metal workpiece processing heat treatment device based on a metal workpiece, and belongs to the technical field of metal workpiece heat treatment.The device comprises a furnace body and a cooling water pool, opposite sides of the furnace body are each provided with a side door, a support frame is fixed outside the furnace body, a winch one for lifting the side door is fixed at the top of the support frame, and the device further comprises a discharging mechanism, wherein the discharging mechanism comprises a bottom support rotatably connected to the bottom of the furnace body.The bottom support is driven to rotate downward by a hydraulic oil cylinder, the workpiece enters the circular cover from the feeding port, the buffer assembly is used for buffering the workpiece entering the circular cover, and after the workpiece is heated and the circular cover is driven downward by the lifting frame to enter the water in the cooling water pool, the contact between the workpiece and the external environment is reduced through the circular cover, the workpiece is in a relatively closed space, the heat loss of the workpiece is reduced, and therefore the quenching hardness, the uniformity of the structure and the product quality stability of the workpiece are improved.

Description

Technical Field

[0001] This invention relates to the field of heat treatment technology for metal workpieces, and particularly to a heat treatment apparatus based on metal workpiece processing. Background Technology

[0002] When heat treating a rod-shaped metal workpiece, the workpiece is placed on a support fork, which moves to send the metal workpiece into the heating furnace. After the metal workpiece is heated in the heating furnace, the support fork is moved to remove the metal workpiece from the heating furnace, and then it is placed in a cooling water tank for cooling treatment. Through heat treatment, the hardness, strength and mechanical properties of the metal workpiece are improved.

[0003] When a bar-shaped metal workpiece is removed from the furnace using a fork after heat treatment, the furnace door must be opened first. Then, the fork is moved into the heating furnace to lift the workpiece. The fork is then moved back to remove the workpiece from the furnace. After removal, the fork is lowered to allow the workpiece to enter a cooling water tank for quenching. However, once the workpiece is removed from the furnace, it is directly exposed to the external environment. Especially in winter when the ambient temperature is low, the workpiece loses heat quickly due to direct contact with the low-temperature air, which can lead to a lower actual quenching temperature. This affects the hardness, microstructure uniformity, and product quality stability of the workpiece. Therefore, this application provides a heat treatment device based on metal workpiece processing to meet this requirement. Summary of the Invention

[0004] This invention provides a heat treatment device for metal workpiece processing to solve the problem that the heat loss of rod-shaped metal workpieces due to direct contact with low-temperature air is too fast, which easily leads to the actual quenching temperature of the rod-shaped metal workpieces being too low, affecting the quenching hardness, microstructure uniformity and product quality stability of the rod-shaped metal workpieces.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] A heat treatment apparatus for metal workpiece processing includes a furnace body and a cooling water tank. Side doors are installed on opposite sides of the furnace body. A support frame is fixed to the outside of the furnace body, and a winch for raising and lowering the side doors is fixed to the top of the support frame. The apparatus also includes:

[0007] The unloading mechanism includes a bottom support rotatably connected to the bottom of the furnace body, a hydraulic cylinder rotatably connected inside the support frame, the telescopic end of the hydraulic cylinder rotatably connected to the bottom of the bottom support, a lifting frame provided on the top of the cooling water tank, a circular cover rotatably connected inside the lifting frame, a feed inlet provided on the side of the circular cover, an opening provided on the top of the circular cover, multiple water permeable grooves provided on the bottom of the circular cover, a circular groove and two square grooves provided on the side of the circular cover respectively, the circular groove being located between the two square grooves, and a buffer assembly provided inside the circular cover.

[0008] After heating is complete, the bottom support rotates downwards, and the workpiece enters the dome through the feed port. The buffer assembly is used to buffer the workpiece entering the dome. At the same time, the lifting frame moves the dome down into the cooling water pool.

[0009] Preferably, a flap is rotatably connected inside the feed inlet of the dome. When the workpiece enters the feed inlet, it squeezes the flap. After the workpiece enters the dome, the flap falls back to close the feed inlet.

[0010] Preferably, the lifting frame includes an outer support fixed to the top of the cooling water pool, a guide is installed inside the outer support, an inner support is slidably connected to the outer support through the guide, a winch for lifting the inner support is fixed to the top of the outer support, a circular cover is rotatably connected inside the inner support, a hydraulic motor is fixed to the side of the inner support, and the output end of the hydraulic motor is fixedly connected to the side of the circular cover.

[0011] Preferably, a baffle is fixed on the side of the outer support near the furnace body, and a curved part is integrally formed on the opposite side of the baffle. A receiving groove is opened in the middle of the baffle, and a movable plate is rotatably connected in the receiving groove. A motor is fixed on the side of the baffle, and the output end of the motor is fixedly connected to the side of the movable plate.

[0012] Preferably, the buffer assembly includes a base frame fixed to the bottom of the dome. Two sets of dampers are fixed to the bottom of the base frame. The telescopic ends of the two sets of dampers movably pass through the base frame and are respectively fixed with buffer plate one and buffer plate two. There are two buffer plates one and two buffer plates two. Buffer plates one and two buffer plates two are symmetrically arranged with the vertical plane passing through the center of the dome as the plane of symmetry. Multiple notches are opened at the bottom of the dome. Buffer plates one and two buffer plates are located in the notches. After the workpiece enters the dome, it is first buffered by buffer plate one and then buffered again by buffer plate two. An outer cover is fixed to the bottom of the base frame, and the dampers are located in the outer cover.

[0013] Preferably, the buffer plate one includes an inclined part one and an inclined part two connected in sequence, the connection of the inclined part one and the inclined part two is fixed to the extension end of the damper, the buffer plate two includes an inclined part three and an inclined part four connected in sequence, the inclined part one and the inclined part three are symmetrically arranged, the inclined part two and the inclined part four are symmetrically arranged, and the ends of the inclined part one and the inclined part three are fixed with a lever, which is located outside the circular cover.

[0014] Preferably, inclined portions one and three are provided with inclined holes, and inclined portions two and four are provided with long grooves.

[0015] Preferably, both ends of the dial are fixed with inclined plates, which are slidably connected to the corresponding square grooves on the side of the circular cover.

[0016] Preferably, the side of the deflector is fixed with multiple blocks, and a through groove is opened at the bottom of the circular cover corresponding to the end of the water permeable channel. The width of the through groove is greater than the width of the end of the water permeable channel. The blocks are attached to the bottom of the circular cover corresponding to the through groove. A guide part is integrally formed on the side of the block away from the deflector.

[0017] Preferably, the width of the permeable trough gradually decreases from the middle to both ends.

[0018] Compared with the prior art, the present invention has at least the following beneficial effects:

[0019] In the above scheme, by setting up a base support, a lifting frame, and a circular cover, the hydraulic cylinder drives the base support to rotate downwards, and the workpiece enters the circular cover from the feed port. The buffer component is used to buffer the workpiece entering the circular cover. At the same time, the lifting frame moves the circular cover down into the cooling water pool. After the workpiece is heated, the circular cover reduces the contact between the workpiece and the external environment, so that the workpiece is in a relatively closed space, reducing the heat loss of the workpiece, thereby improving the quenching hardness, microstructure uniformity and product quality stability of the workpiece. At the same time, after the circular cover enters the water in the cooling water pool, the water can enter from the permeable groove, circular groove and square groove and fully contact the workpiece, thereby ensuring the quenching effect of the workpiece.

[0020] By setting up a flap, when the workpiece enters the feed inlet and slides down along the inner wall of the feed inlet, it squeezes the flap, causing the flap to rotate upward. When the workpiece enters the dome, the flap falls back to close the feed inlet. After the flap falls back, when the subsequent workpiece has cooled down, the drive motor drives the dome to rotate so that the opening faces downward. During the rotation, the flap is always in a closed state to prevent the workpiece from being discharged from the feed inlet.

[0021] By setting baffles and bends, after the workpiece enters the dome, the winch on the lifting frame unwinds the wire rope, causing the inner support to move the dome down into the water. When the workpiece comes into contact with the water, a large amount of water vapor is generated. The water vapor will emerge from the opening at the top of the dome. At this time, the baffle on the outer support prevents the water vapor from entering the furnace. At the same time, the bends on the sides of the baffle can further improve the baffle's blocking effect on the water vapor, preventing the water vapor from passing over the sides of the baffle.

[0022] By setting up a movable plate, as the workpiece enters the dome, the motor drives the movable plate to rotate downwards, so that the movable plate blocks the opening at the top of the dome. By sealing the opening at the top of the dome with the movable plate, the heat diffusion of the workpiece is further reduced, thereby further ensuring the quenching effect of the workpiece. At the same time, when the dome moves down, the motor drives the movable plate to rotate upwards to prevent the movable plate from obstructing the downward movement of the inner support.

[0023] By setting up a damper, buffer plate one, and buffer plate two, after the workpiece enters the dome, buffer plate one is first squeezed, causing it to move down. The damper corresponding to buffer plate one contracts, and the cooperation between the damper and buffer plate one reduces the speed at which the workpiece falls along the inner wall of the dome, thereby reducing the impact of the workpiece on the dome. When the workpiece continues to roll inside the dome, buffer plate two is squeezed, and the damper corresponding to buffer plate two contracts. The cooperation between the damper and buffer plate two further buffers the movement of the workpiece, further reducing the impact of the workpiece on the dome. When the workpiece separates from buffer plate one or buffer plate two, buffer plate one or buffer plate two rises and falls under the action of the damper. During the rising and falling process, the workpiece will still roll back and forth inside the dome. At this time, buffer plate one or buffer plate two, which is in the process of rising, buffers the workpiece again. Finally, the workpiece stops at the bottom of the inner wall of the dome.

[0024] By setting up inclined sections one, two, three, and four, when the workpiece rolls along the inner wall of the dome, it first squeezes the inclined section one of the buffer plate one. After the buffer plate moves down, the workpiece continues to roll along the inner wall of the dome, squeezing the inclined section four of the buffer plate two. At this time, the buffer plate two moves down, and the workpiece continues to roll along the inner wall of the dome under its own inertia until it starts to roll in the opposite direction. During the reverse rolling process, it squeezes the inclined section three on the buffer plate two which is in the process of rising and falling. After passing the buffer plate two, it squeezes the inclined section four on the buffer plate one which is in the process of rising. After the workpiece passes through the mutual cooperation of inclined sections one, two, three, and four, it finally stops at the bottom position of the inner wall of the dome.

[0025] By setting a deflector, after the dome is submerged in water, the drive motor will cause the dome to swing back and forth. When the dome swings back and forth, it will cause the deflector to swing back and forth, stirring the water flow. This allows the water flow inside the dome to exchange heat with the external water flow, preventing the water flow inside the dome from overheating and affecting the quenching effect of the workpiece. During the back and forth swing, the workpiece alternately squeezes the first buffer plate and the second buffer plate. After the first buffer plate or the second buffer plate moves down, it will drive the deflector to move down. After the deflector moves down, the position of the water flow is changed, which improves the disturbance effect on the water flow. This allows the water at the bottom with a lower temperature to fully exchange heat with the water at the dome, further ensuring the quenching effect of the workpiece.

[0026] By setting inclined holes and long grooves, when the dial plate moves the water flow, some of the water flow is guided by the dial plate and flows from the inclined holes of inclined section one or inclined section three to the workpiece position. This allows the lower temperature water to flow to the workpiece position, improving the quenching effect on the workpiece. At the same time, the long grooves on inclined section two and inclined section four can improve the water permeability of buffer plate one or buffer plate two, allowing the water to fully contact the workpiece for quenching treatment.

[0027] By setting up inclined plates and square grooves, after the lever moves downwards, the inclined plates approach the square grooves. During the rotation of the dome, the inclined plates can force the lower-temperature water flow from the outside into the dome to quench the workpiece. When the other inclined plate, which does not move, follows the rotation of the dome and moves the water flow, it is affected by its own tilted shape, and a negative pressure is formed in the space between the inclined plate and the corresponding square groove. This helps to discharge the higher-temperature water inside the dome, making the heat exchange between the water flow inside and outside the dome more complete and thorough.

[0028] By setting up a stop and a through slot, when the lever is not moved down, the stop blocks the through slot, making it difficult for water to enter the hood from the through slot. When the lever moves down, it drives the stop to move down as well. At the same time, during the rotation of the hood, the lever drives the stop to rotate together. When the stop rotates, the water flows smoothly from the through slot into the hood through the guide part to quench the workpiece. When the hood rotates, the stop and guide part can increase the amount of water entering the hood, thereby further improving the quenching effect on the workpiece. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 This is a three-dimensional structural diagram of the side door of the present invention;

[0031] Figure 3 This is a three-dimensional structural diagram of the bottom support of the present invention;

[0032] Figure 4 This is a three-dimensional structural diagram of the baffle of the present invention;

[0033] Figure 5 This is a three-dimensional structural diagram of the dome of the present invention;

[0034] Figure 6 This is a three-dimensional structural diagram of the circular groove of the present invention;

[0035] Figure 7 This is a cross-sectional view of the damper in this invention;

[0036] Figure 8 This is a three-dimensional structural diagram of the permeable groove of the present invention;

[0037] Figure 9 This is a three-dimensional structural diagram of the stop block of the present invention;

[0038] Figure 10 This is a three-dimensional structural diagram of the inclined plate of the present invention.

[0039] In the diagram: 1. Furnace body; 2. Cooling water pool; 3. Side door; 4. Winch 1; 5. Unloading mechanism; 6. Base support; 7. Hydraulic cylinder; 8. Outer support; 9. Inner support; 10. Circular cover; 11. Hydraulic motor; 12. Opening; 13. Baffle; 14. Bending section; 15. Movable plate; 16. Motor; 17. Buffer plate 1; 18. Inclined section 1; 19. Inclined section 2; 20. Buffer plate 2; 21. Inclined section 3; 22. Inclined section 4; 23. Damper; 24. Outer cover; 25. Base frame; 26. Inclined hole; 27. Long slot; 28. Water permeable slot; 29. ​​Through slot; 30. Pulley; 31. Inclined plate; 32. Stop block; 33. Guide section; 34. Circular slot; 35. Square slot; 36. Winch 2; 37. Flip plate.

[0040] As shown in the figure, specific structures and devices are labeled in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs, and such adjustments or modifications are still included in the scope of the appended claims. Detailed Implementation

[0041] The present invention provides a heat treatment apparatus for metal workpiece processing, which is described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art can use other alternative methods to implement some well-known technologies; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0042] like Figures 1-10 As shown, an embodiment of the present invention provides a heat treatment apparatus for metal workpiece processing, including a furnace body 1 and a cooling water tank 2. Side doors 3 are installed on opposite sides of the furnace body 1. A support frame is fixed to the outside of the furnace body 1, and a winch 4 for raising and lowering the side doors 3 is fixed to the top of the support frame. The apparatus also includes:

[0043] The unloading mechanism 5 includes a base support 6 rotatably connected to the bottom of the furnace body 1. A hydraulic cylinder 7 is rotatably connected inside the support frame, and the telescopic end of the hydraulic cylinder 7 is rotatably connected to the bottom of the base support 6. A lifting frame is installed on the top of the cooling water pool 2, and a circular cover 10 is rotatably connected inside the lifting frame. The circular cover 10 has a feed inlet on its side, an opening 12 on its top, and multiple water-permeable grooves 28 on its bottom. The sides of the circular cover 10 have circular grooves 34 and two square grooves 35, with the circular groove 34 located between the two square grooves 35. A buffer assembly is installed inside the circular cover 10. After heating, the base support 6 rotates downward, and the workpiece enters the circular cover 10 through the feed inlet. The buffer assembly is used to buffer the workpiece entering the circular cover 10. At the same time, the lifting frame moves the circular cover 10 down into the water of the cooling water pool 2. The furnace body 1 provides the core space for heating and heat treatment of metal workpieces, ensuring that the workpieces can reach the required temperature. The heat treatment temperature is set, and the cooling water tank 2 stores quenching water to provide a medium for rapid cooling and quenching of the workpiece after heating. The side door 3 is used to close and open the furnace body 1. When closed, it ensures that the temperature inside the furnace body 1 is stable and reduces heat loss. When open, it facilitates the feeding and taking out of the workpiece. The support frame provides a stable mounting support carrier for the winch 4 and the hydraulic cylinder 7. The winch 4 provides power for the lifting and lowering of the side door 3. By winding and unwinding the wire rope, the side door 3 is driven to rise and open or fall and close. The unloading mechanism 5 realizes the unloading of the workpiece after heating. The hydraulic cylinder 7 provides power for the rotation of the bottom support 6, driving the bottom support 6 to rotate downward, so that the workpiece that has been heated in the furnace body 1 can slide off the bottom support 6 by gravity. The lifting frame is used to drive the circular cover 10 to achieve lifting and lowering action, so that the circular cover 10 can move down into the water of the cooling water tank 2 to complete the quenching operation of the workpiece, or it can rise to a designated position to facilitate the taking out of the workpiece and subsequent transfer.

[0044] The circular cover 10 is used to wrap the workpiece, reduce the direct contact between the workpiece and the external environment after it is taken out of the furnace body 1, reduce the heat loss of the workpiece, ensure the temperature stability of the workpiece before quenching, and thus improve the quenching hardness, structure uniformity and product quality stability of the workpiece. The opening 12 is used to discharge the large amount of water vapor generated when the workpiece is quenched in water, to avoid the accumulation of water vapor in the circular cover 10 and affect the quenching effect, and also to facilitate the removal of the workpiece after quenching. The water permeable groove 28, the circular groove 34 and the square groove 35 are used to allow the water in the cooling water pool 2 to flow smoothly into the interior of the circular cover 10 and fully contact the workpiece inside the circular cover 10, to ensure that all parts of the workpiece can be cooled evenly and improve the quenching effect.

[0045] The buffer assembly includes a base frame 25 fixed to the bottom of the dome 10. Two sets of dampers 23 are fixed to the bottom of the base frame 25. The telescopic ends of the two sets of dampers 23 extend through the base frame 25 and are respectively fixed with a buffer plate 17 and a buffer plate 20. There are two buffer plates 17 and two buffer plates 20. The buffer plates 17 and 20 are symmetrically arranged with the vertical plane passing through the center of the dome 10 as the plane of symmetry. The bottom of the dome 10 has multiple openings. The buffer plates 17 and 20 are all located in the openings. After the workpiece enters the dome 10, it is first buffered by the buffer plate 17 and then buffered again by the buffer plate 20. An outer cover 24 is fixed to the bottom of the base frame 25, and the dampers 23 are located inside the outer cover 24. The base frame 25 is fixed to the bottom of the circular cover 10, providing a stable installation support for the damper 23, buffer plate 17, and buffer plate 20, ensuring the connection stability of each component of the buffer assembly. The two sets of dampers 23 provide damping force for the buffer action of buffer plate 17 and buffer plate 20 respectively. They absorb the impact force of the workpiece through their own extension and retraction, reduce the moving speed of the workpiece, and achieve buffer protection for the workpiece. The outer cover 24 is wrapped around the outside of the damper 23, which plays a sealing and protective role for the damper 23, preventing water in the cooling water pool 2 from entering the interior of the damper 23, avoiding corrosion and jamming of the damper 23, ensuring the normal extension and retraction function of the damper 23, and extending the service life of the damper 23.

[0046] The workpiece first presses against the first buffer plate 17. The first buffer plate 17, together with the corresponding damper 23, completes the first-level buffering, reducing the falling speed of the workpiece and reducing the initial impact of the workpiece on the dome 10. Then the workpiece continues to roll and press against the second buffer plate 20. The second buffer plate 20, together with the corresponding damper 23, completes the second-level buffering, further reducing the speed of the workpiece, weakening the impact force of the workpiece, reducing the collision between the workpiece and the dome 10, protecting the dome 10 and the workpiece, thereby ensuring the finished product quality of the workpiece.

[0047] like Figure 4 and Figure 7 As shown in this embodiment, a flap 37 is rotatably connected inside the feed inlet of the dome 10. When the workpiece enters the feed inlet, it squeezes the flap 37. After the workpiece enters the dome 10, the flap 37 falls back to close the feed inlet. The flap 37 realizes the automatic opening and closing of the feed inlet. When the workpiece enters the feed inlet, it squeezes the flap 37, causing the flap 37 to rotate upward, providing a channel for the workpiece to enter the interior of the dome 10. When the workpiece is completely inside the dome 10, the flap 37 automatically falls back under its own gravity to close the feed inlet. This structure can effectively prevent the workpiece from being accidentally discharged from the feed inlet during the subsequent rotation and downward movement of the dome 10.

[0048] like Figure 1 and Figure 4As shown in this embodiment, the lifting frame includes an outer support 8 fixed to the top of the cooling water tank 2. A guide is installed inside the outer support 8. An inner support 9 is slidably connected to the outer support 8 through the guide. A winch 36 for lifting the inner support 9 is fixed to the top of the outer support 8. A circular cover 10 is rotatably connected to the inside of the inner support 9. A hydraulic motor 11 is fixed to the side of the inner support 9. The output end of the hydraulic motor 11 is fixedly connected to the side of the circular cover 10. The outer support 8 is fixed to the top of the cooling water tank 2, providing a stable foundation support for the entire lifting frame, bearing the weight of components such as the inner support 9, the circular cover 10, and the hydraulic motor 11. At the same time, it provides an installation carrier for the guide and the winch 36. The guide mainly consists of a guide rail and a slider. The guide rail is installed inside the outer support 8, and the slider is installed on the side of the inner support 9. When the inner support 9 is lifted, it drives the slider to move along the guide rail, thereby guiding the lifting of the inner support 9.

[0049] The winch 36 provides power for the lifting and lowering of the inner support 9. By winding and unwinding the wire rope, it drives the inner support 9 and the circular cover 10 to rise and fall smoothly, meeting the requirements of the immersion depth of the circular cover 10 during workpiece quenching. It also facilitates the circular cover 10 to rise to the designated position for unloading after the workpiece is quenched. The hydraulic motor 11 provides power for the rotation of the circular cover 10, which can drive the circular cover 10 to reciprocate or rotate in one direction. When the circular cover 10 rotates in one direction, the opening 12 can be turned downwards, which facilitates the workpiece after quenching to slide down from the opening 12 for unloading, realizing the automation of unloading and improving the efficiency of operation.

[0050] like Figure 4 As shown in this embodiment, a baffle 13 is fixed on the side of the outer support 8 near the furnace body 1. A curved part 14 is integrally formed on the opposite side of the baffle 13. A receiving groove is opened in the middle of the baffle 13. A movable plate 15 is rotatably connected in the receiving groove. A motor 16 is fixed on the side of the baffle 13. The output end of the motor 16 is fixedly connected to the side of the movable plate 15. The baffle 13 is fixed on the side of the outer support 8 near the furnace body 1 to block the large amount of water vapor generated when the workpiece is immersed in water quenching, prevent water vapor from entering the interior of the furnace body 1, and avoid damage to the inner wall of the furnace body 1 due to contact with water vapor. The curved part 14 integrally formed on the opposite side of the baffle 13 can expand the blocking range of the baffle 13, further improve the blocking effect on water vapor, and prevent water vapor from passing over the side of the baffle 13. The receiving groove provides installation and rotation space for the movable plate 15, so that the movable plate 15 can rotate flexibly without affecting the normal blocking function of the baffle 13.

[0051] The motor 16 provides power for the rotation of the movable plate 15 and can control the rotation angle of the movable plate 15. During the process of the workpiece entering the dome 10, the motor 16 drives the movable plate 15 to rotate downward, so that the movable plate 15 blocks the opening 12 at the top of the dome 10, sealing the opening 12 at the top of the dome 10, further reducing the heat diffusion of the workpiece inside the dome 10, ensuring the temperature stability of the workpiece before quenching, and improving the quenching effect. When the inner support 9 drives the dome 10 to start moving downward, the motor 16 drives the movable plate 15 to rotate upward and retract into the receiving groove, avoiding the movable plate 15 from obstructing the downward movement of the inner support 9 and the dome 10, ensuring the smooth progress of the quenching operation. At the same time, a baffle can also be installed on the baffle 13, and the motor 16 is installed inside the baffle. The baffle reduces the impact of the heat of the furnace body 1 on the motor 16.

[0052] like Figure 9 and Figure 10 As shown, in this embodiment, the buffer plate 17 includes a first inclined portion 18 and a second inclined portion 19 connected in sequence. The connection between the first inclined portion 18 and the second inclined portion 19 is fixed to the telescopic end of the damper 23. The buffer plate 20 includes a third inclined portion 21 and a fourth inclined portion 22 connected in sequence. The first inclined portion 18 and the third inclined portion 21 are symmetrically arranged, as are the second inclined portion 19 and the fourth inclined portion 22. A lever 30 is fixed to the end of each of the first inclined portion 18 and the third inclined portion 21. The lever 30 is located outside the circular cover 10. Inclined holes 26 are provided on the first inclined portion 18 and the third inclined portion 21, and elongated slots 27 are provided on the second inclined portion 19 and the fourth inclined portion 22. The first inclined portion 18 and the second inclined portion 29 of the buffer plate 17 are connected in sequence. All 19 are inclined structures. Inclined part 18 is used to receive the workpiece entering the circular cover 10 and guide the workpiece to slide smoothly along the inclined surface, avoiding the workpiece from directly hitting the buffer plate 17 and causing damage. Inclined parts 3 21 and 4 22 of the buffer plate 20 are symmetrically arranged with the inclined parts 18 and 2 19 of the buffer plate 17 to ensure that the workpiece is subjected to uniform force during rolling. Inclined part 4 22 is used to receive the workpiece after the first-stage buffer and guide the workpiece to slide along the inclined surface. It works with the damper 23 to complete the second-stage buffer and further reduce the speed of the workpiece. Inclined part 3 21 is used to buffer the workpiece again when it rolls in the opposite direction, realizing the reciprocating buffer of the workpiece and allowing the workpiece to stay smoothly at the bottom of the inner wall of the circular cover 10.

[0053] The lever 30 fixed at the ends of the inclined section 18 and the inclined section 31 is located outside the circular cover 10. When the hydraulic motor 11 drives the circular cover 10 to swing back and forth, the lever 30 will swing back and forth synchronously, stirring the water flow in the cooling water pool 2, so that the hot water inside the circular cover 10 and the cold water outside can continuously exchange heat, preventing the water flow temperature inside the circular cover 10 from being too high and affecting the quenching effect of the workpiece. At the same time, when the workpiece alternately squeezes the buffer plate 17 and the buffer plate 20, the buffer plate 17 and the buffer plate 20 will drive the corresponding lever 30 to move down synchronously, changing the position of the lever 30 stirring the water flow, enhancing the disturbance effect on the water flow, so that the water at the bottom of the cooling water pool 2 with the water near the circular cover 10 with the higher temperature can fully exchange heat, further improving the quenching effect of the workpiece.

[0054] The inclined holes 26 on inclined section 18 and inclined section 3 21 are used to guide the water flow to the workpiece. When the deflector 30 moves the water flow in the cooling water pool 2, some of the water will flow directly to the surface of the workpiece inside the dome 10 through the inclined holes 26 under the guidance of the deflector 30. This allows the cold water at a lower temperature to act on the workpiece quickly, accelerates the cooling speed of the workpiece, and improves the quenching effect. At the same time, the inclined structure of the inclined holes 26 can ensure that the water flow is smooth. The long grooves 27 on inclined section 29 and inclined section 4 22 are used to improve the water permeability of the buffer plate 17 and buffer plate 20. This allows the water flow in the cooling water pool 2 to quickly enter the interior of the dome 10 through the long grooves 27 and fully contact the workpiece, ensuring that all parts of the workpiece can be cooled evenly, further improving the quenching quality of the workpiece. At the same time, the long grooves 27 can also reduce the obstruction of the water flow by the buffer plate 17 and buffer plate 20, making the water flow circulation smoother.

[0055] like Figures 8-10 As shown, in this embodiment, inclined plates 31 are fixed at both ends of the lever 30. The inclined plates 31 are slidably connected to the corresponding square grooves 35 on the side of the circular cover 10. The inclined plates 31 are fixed at both ends of the lever 30 and slidably connected to the side of the circular cover 10 to ensure that the inclined plates 31 can move down synchronously when the lever 30 moves down. When the lever 30 moves down, the inclined plates 31 will approach the position of the square grooves 35. During the rotation of the circular cover 10, the inclined plates 31 can forcefully guide the cooler water in the cooling water pool 2 through the square grooves 35 into the circular cover 10. Inside the cover 10, the water directly acts on the workpiece surface, improving the quenching effect. Meanwhile, the inclined plate 31 on the other side, which does not move, rotates synchronously with the cover 10 and agitates the water flow. Since the inclined plate 31 is inclined, a negative pressure is formed between the inclined plate 31 and the corresponding square groove 35 when it rotates. This negative pressure promotes the discharge of the high-temperature water flow inside the cover 10 through the square groove 35, achieving rapid and sufficient heat exchange between the water flow inside and outside the cover 10, preventing the water temperature inside the cover 10 from rising, and further ensuring the quenching effect of the workpiece.

[0056] like Figures 8-10As shown in this embodiment, multiple baffles 32 are fixed on the side of the deflector 30. A through groove 29 is provided at the bottom of the circular cover 10 corresponding to the end of the permeable groove 28. The width of the through groove 29 is greater than the width of the end of the permeable groove 28. The baffles 32 are attached to the bottom of the circular cover 10 corresponding to the through groove 29. A guide part 33 is integrally formed on the side of the baffle 32 away from the deflector 30. The baffles 32 are fixed to the side of the deflector 30 to control the opening and closing of the through groove 29. When the deflector 30 is not moved down, the baffles 32 are tightly attached to the bottom of the circular cover 10 corresponding to the through groove 29, blocking the through groove 29 and making it difficult for water to enter the interior of the circular cover 10 from the through groove 29. At this time, the water mainly enters the circular cover 10 through the permeable groove 28, the circular groove 34, and the square groove 35.

[0057] When the lever 30 moves down, it drives the stop block 32 to move down synchronously, causing the stop block 32 to separate from the through groove 29 and opening the through groove 29. During the rotation of the circular cover 10, the stop block 32 will rotate synchronously. The guide part 33 integrally formed on the stop block 32 provides a guiding function for the water flow, which can guide the water flow in the cooling water pool 2 to smoothly enter the interior of the circular cover 10 through the through groove 29. The width of the through groove 29 is greater than the width of the end of the water permeable groove 28, which can greatly increase the amount of cooling water entering the circular cover 10, so that the water flow can contact the workpiece more fully, and further improve the quenching effect and cooling efficiency of the workpiece.

[0058] like Figure 8 As shown in this embodiment, the width of the permeable trough 28 gradually decreases from the middle to both ends, forming a structure that is wide in the middle and narrow at both ends. This structure allows water to mainly enter the interior of the dome 10 from the middle part of the permeable trough 28. The bottom of the inner wall of the dome 10 is the final position where the workpiece stops. The middle part of the permeable trough 28 corresponds to the contact position between the workpiece and the dome 10, which allows more cold water to directly act on the contact position between the workpiece and the dome 10, thereby increasing the cooling rate of this part and avoiding uneven cooling due to poor heat dissipation at the contact point between the workpiece and the dome 10. This further ensures the quenching effect and quenching uniformity of the workpiece.

[0059] Working principle: After the workpiece is heated in the furnace body 1, the winch 4 on the support frame drives the side door 3 to rise and open. The hydraulic cylinder 7 drives the bottom support 6 to rotate downward. The workpiece slides down from the bottom support 6 and enters through the feed port of the circular cover 10. When the workpiece slides down along the inner wall of the feed port, it squeezes the flap 37, causing the flap 37 to rotate upward. After the workpiece enters the circular cover 10, the flap 37 automatically falls back and closes the feed port. During the subsequent rotation of the circular cover 10, the flap 37 always remains closed to prevent the workpiece from being accidentally discharged from the feed port.

[0060] After the workpiece enters the interior of the dome 10, it undergoes multi-stage buffering by the buffer assembly. First, the workpiece presses against the inclined portion 18 of the buffer plate 17, causing the buffer plate 17 to move downwards. The damper 23 corresponding to the buffer plate 17 contracts, reducing the speed at which the workpiece falls along the inner wall of the dome 10 and minimizing the impact on the dome 10. As the workpiece continues to roll along the inner wall of the dome 10, it presses against the inclined portion 22 of the buffer plate 20, causing the damper 23 corresponding to the buffer plate 20 to contract. The damper 23 and the buffer plate 20 then work together to reduce the speed at which the workpiece falls along the inner wall of the dome 10, thus reducing the impact on the dome 10. The workpiece movement is buffered again by the damper 23, further reducing the impact of the workpiece on the dome 10. When the workpiece is separated from the first buffer plate 17 or the second buffer plate 20, the first buffer plate 17 or the second buffer plate 20 rises and resets under the action of the damper 23. The workpiece will still roll back and forth inside the dome 10. The first buffer plate 17 or the second buffer plate 20 will buffer the workpiece again during the rising process. After being buffered by the first inclined part 18, the second inclined part 19, the third inclined part 21 and the fourth inclined part 22, the workpiece finally stops stably at the bottom of the inner wall of the dome 10.

[0061] During the process of the workpiece entering the dome 10, the motor 16 drives the movable plate 15 to rotate downward, so that the movable plate 15 blocks the opening 12 at the top of the dome 10, sealing the opening 12 at the top of the dome 10. The dome 10 encloses the workpiece inside, reducing the direct contact between the workpiece and the external environment, and keeping the workpiece in a relatively closed space, reducing the heat loss of the workpiece, and further ensuring the quenching effect of the workpiece. When the inner support 9 drives the dome 10 to start moving downward, the motor 16 drives the movable plate 15 to rotate upward, so as to prevent the movable plate 15 from obstructing the downward movement of the inner support 9.

[0062] The winch 2 36 on the outer support 8 unwinds the wire rope, causing the inner support 9 to move downward along the guide. The inner support 9 drives the entire circular cover 10 to move down into the water in the cooling water pool 2. The water can enter the interior of the circular cover 10 from the water permeable groove 28 at the bottom of the circular cover 10, the circular groove 34 and the square groove 35 on the side, and fully contact the workpiece to ensure the quenching effect of the workpiece.

[0063] When the workpiece is immersed in water, a large amount of water vapor is generated and rises upward from the opening 12 at the top of the dome 10. The baffle 13 on the outer support 8 blocks the water vapor and prevents it from entering the furnace body 1. The curved part 14 on the opposite side of the baffle 13 further enhances the blocking effect on the water vapor and prevents the water vapor from passing over the side of the baffle 13.

[0064] After the circular cover 10 is submerged in water, the hydraulic motor 11 drives the circular cover 10 to swing back and forth. The circular cover 10 drives the buffer plate 17 and the baffle plate 30 on the buffer plate 20 to swing back and forth synchronously, which agitates the water flow in the cooling water pool 2, so that the water flow inside the circular cover 10 and the water flow outside the circular cover 10 can continuously exchange heat, preventing the water flow temperature inside the circular cover 10 from being too high and affecting the quenching effect of the workpiece.

[0065] During the reciprocating swing of the dome 10, the workpiece alternately presses the buffer plate 17 and the buffer plate 20. When the buffer plate 17 or the buffer plate 20 moves downward, it drives the corresponding deflector 30 to move downward synchronously, changing the position of the water flow and enhancing the disturbance effect on the water flow. This allows the water at the bottom of the cooling water pool 2 with a lower temperature to fully exchange heat with the water near the dome 10 with a higher temperature, further improving the quenching effect of the workpiece.

[0066] When the lever 30 moves the water flow, some of the water flow is guided by the lever 30 to flow from the inclined hole 26 on the inclined part 18 or the inclined part 31 to the workpiece position, so that the water flow with lower temperature directly acts on the workpiece surface, improving the quenching effect. The long groove 27 on the inclined part 29 and the inclined part 42 improves the water permeability of the buffer plate 17 and the buffer plate 20, ensuring that the water flow is in full contact with the workpiece.

[0067] The inclined plates 31 at both ends of the lever 30 are slidably connected to the square grooves 35 on the side of the circular cover 10. After the lever 30 moves downward, the inclined plates 31 approach the square grooves 35. After the lever 30 moves downward, it drives the inclined plates 31 to approach the corresponding square grooves 35. The inclined plates 31 forcefully guide the external water with a lower temperature into the interior of the circular cover 10 to quench the workpiece. The other inclined plate 31 that does not move follows the rotation of the circular cover 10 and moves the water flow. Due to its own tilted shape, a negative pressure state is formed between the inclined plate 31 and the corresponding square groove 35, which promotes the discharge of the water with a higher temperature inside the circular cover 10, so that the heat exchange between the water flow inside and outside the circular cover 10 is more complete and thorough.

[0068] When the lever 30 is not moved down, the stop block 32 on the side of the lever 30 blocks the through groove 29 at the bottom of the round cover 10, making it difficult for water to enter the interior of the round cover 10 from the through groove 29. When the lever 30 moves down, it drives the stop block 32 to move down synchronously. During the rotation of the round cover 10, the stop block 32 rotates with it. The guide part 33 on the stop block 32 guides the water to flow smoothly from the through groove 29 into the interior of the round cover 10, increasing the amount of cooling water entering the round cover 10 and further improving the quenching effect of the workpiece. The width of the water-permeable groove 28 gradually decreases from the middle to both ends, so that the contact position between the workpiece and the round cover 10 can be quenched more effectively, reducing the influence of the round cover 10 on the workpiece.

[0069] After the workpiece is quenched, the hydraulic motor 11 stops driving the circular cover 10 to swing. The winch 2 36 winds up the wire rope to make the circular cover 10 move upward. After moving upward to the highest point, the hydraulic motor 11 drives the circular cover 10 to rotate so that the opening 12 faces downward and the damper 23 faces upward. The workpiece falls from the opening 12 onto the support fork. Then, the support fork is moved to remove the workpiece from the circular cover 10. The hydraulic motor 11 drives the circular cover 10 to rotate in the opposite direction to achieve reset. The hydraulic cylinder 7 at the bottom support 6 drives the bottom support 6 to rotate upward and fit against the bottom of the furnace body 1. Then, another support fork sends a new workpiece into the furnace body 1 from the side door 3 and places it on the bottom support 6. Then, the winch 1 4 is started to make the side door 3 fall down and close the furnace body 1.

[0070] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A heat treatment apparatus for metal workpiece processing, comprising a furnace body (1) and a cooling water tank (2), wherein side doors (3) are installed on opposite sides of the furnace body (1), a support frame is fixed to the outside of the furnace body (1), and a winch (4) for lifting and lowering the side doors (3) is fixed to the top of the support frame, characterized in that, Also includes: The unloading mechanism (5) includes a bottom support (6) rotatably connected to the bottom of the furnace body (1), a hydraulic cylinder (7) rotatably connected inside the support frame, the telescopic end of the hydraulic cylinder (7) rotatably connected to the bottom of the bottom support (6), a lifting frame is provided on the top of the cooling water pool (2), a circular cover (10) rotatably connected inside the lifting frame, a feed port is provided on the side of the circular cover (10), an opening (12) is provided on the top of the circular cover (10), a plurality of water permeable grooves (28) are provided on the bottom of the circular cover (10), a circular groove (34) and two square grooves (35) are provided on the side of the circular cover (10), the circular groove (34) is located between the two square grooves (35), and a buffer assembly is provided inside the circular cover (10). After heating is completed, the bottom support (6) rotates downwards, and the workpiece enters the round cover (10) from the feed port. The buffer assembly is used to buffer the workpiece entering the round cover (10). At the same time, the lifting frame drives the round cover (10) to move down into the water of the cooling water pool (2). A flap (37) is rotatably connected inside the feed inlet of the round cover (10). When the workpiece enters the feed inlet, it squeezes the flap (37). After the workpiece enters the round cover (10), the flap (37) falls back to close the feed inlet. The buffer assembly includes a base frame (25) fixed to the bottom of the dome (10). Two sets of dampers (23) are fixed to the bottom of the base frame (25). The telescopic ends of the two sets of dampers (23) are movable through the base frame (25) and respectively fixed with buffer plate one (17) and buffer plate two (20). There are two buffer plates one (17) and two buffer plates two (20). Buffer plates one (17) and two buffer plates two (20) are symmetrically arranged with the vertical plane passing through the center of the dome (10) as the symmetrical plane. Multiple notches are opened at the bottom of the dome (10). Buffer plates one (17) and two buffer plates two (20) are located in the notches. After the workpiece enters the dome (10), it is first buffered by buffer plate one (17) and then buffered again by buffer plate two (20). An outer cover (24) is fixed to the bottom of the base frame (25). The dampers (23) are located in the outer cover (24).

2. The heat treatment apparatus for metal workpiece processing according to claim 1, characterized in that, The lifting frame includes an outer support (8) fixed to the top of the cooling water pool (2), a guide is installed inside the outer support (8), and an inner support (9) is slidably connected inside the outer support (8) through the guide. A winch (36) for lifting the inner support (9) is fixed to the top of the outer support (8). A circular cover (10) is rotatably connected inside the inner support (9). A hydraulic motor (11) is fixed to the side of the inner support (9), and the output end of the hydraulic motor (11) is fixedly connected to the side of the circular cover (10).

3. The heat treatment apparatus for metal workpiece processing according to claim 2, characterized in that, The outer support (8) is fixed with a baffle (13) on the side near the furnace body (1). A curved part (14) is integrally formed on the opposite side of the baffle (13). A receiving groove is opened in the middle of the baffle (13). A movable plate (15) is rotatably connected in the receiving groove. A motor (16) is fixed on the side of the baffle (13). The output end of the motor (16) is fixedly connected to the side of the movable plate (15).

4. The heat treatment apparatus for metal workpiece processing according to claim 1, characterized in that, The buffer plate one (17) includes an inclined part one (18) and an inclined part two (19) connected in sequence. The connection between the inclined part one (18) and the inclined part two (19) is fixed to the telescopic end of the damper (23). The buffer plate two (20) includes an inclined part three (21) and an inclined part four (22) connected in sequence. The inclined part one (18) and the inclined part three (21) are symmetrically arranged, and the inclined part two (19) and the inclined part four (22) are symmetrically arranged. The ends of the inclined part one (18) and the inclined part three (21) are both fixed with a lever (30). The lever (30) is located outside the round cover (10).

5. The heat treatment apparatus for metal workpiece processing according to claim 4, characterized in that, Inclined holes (26) are provided on inclined part one (18) and inclined part three (21), and long grooves (27) are provided on inclined part two (19) and inclined part four (22).

6. The heat treatment apparatus for metal workpiece processing according to claim 4, characterized in that, Both ends of the dial (30) are fixed with inclined plates (31), and the inclined plates (31) are slidably connected to the square groove (35) on the side of the round cover (10).

7. The heat treatment apparatus for metal workpiece processing according to claim 4, characterized in that, The side of the dial plate (30) is fixed with multiple blocks (32). The bottom of the round cover (10) is provided with a through groove (29) corresponding to the end of the water permeable groove (28). The width of the through groove (29) is greater than the width of the end of the water permeable groove (28). The blocks (32) are attached to the bottom of the round cover (10) corresponding to the through groove (29). The side of the blocks (32) away from the dial plate (30) is integrally formed with a guide part (33).

8. The heat treatment apparatus for metal workpiece processing according to claim 1, characterized in that, The width of the permeable trough (28) gradually decreases from the middle to both ends.

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