Auxiliary blanking mechanism at outlet of normalizing furnace

Abstract

The utility model relates to the technical field of heat treatment device, concretely is normalizing furnace export auxiliary unloading mechanism, including setting the buffer structure in normalizing furnace export position, the buffer structure includes the buffer plate and the extension spring located buffer plate both sides of rotation connection in normalizing furnace both sides, one end of extension spring is fixed on the both sides of buffer plate, and the other end of extension spring is fixed on normalizing furnace both sides, the below of buffer plate is equipped with the material frame, and buffer plate end portion is located material frame top, and extends into material frame mouth portion horizontal distance one third position. The application can set the buffer structure in the mouth portion of normalizing furnace, slow down the workpiece falling speed by extension spring elasticity, reduce the impact, can prevent the workpiece from being hurt after falling, optimize the workpiece falling path simultaneously, reduce the unloading time of single piece, effectively improve the production efficiency while preventing the workpiece from being hurt.

Description

Technical Field

[0001] This utility model relates to the technical field of heat treatment equipment, specifically to an auxiliary feeding mechanism at the outlet of a normalizing furnace. Background Technology

[0002] In the field of metal heat treatment, a normalizing furnace is a core piece of equipment used to heat, hold, and slowly cool metal workpieces such as steel billets and forgings to refine grains and improve microstructure. Driven by a chain conveyor belt, the workpiece moves from the inlet to the outlet of the normalizing furnace. During this process, the furnace heats the workpiece. After the normalizing process is complete, the workpiece is discharged from the outlet and collected.

[0003] Currently, the main method for unloading materials at the outlet of a normalizing furnace is through a conveyor belt, where a chain conveyor belt below the furnace opening directly receives the workpieces output from inside the furnace. For example, the existing technology "Anti-collision Unloading Machine for a Mesh Belt Furnace" (CN112322877A) uses an inclined plate at the furnace opening to allow the workpieces to fall into the material box along the inclined plate. However, the existing technology still has the following technical problems: 1. In the existing technology, the inclined plate extends into the bottom of the material box, and part of the space inside the material box is blocked by the inclined plate. Therefore, when the material is filled to a certain extent, the inclined plate needs to retract to reduce its length and make way for the remaining space in the material box for filling. When the inclined plate retracts a certain distance, the material in the material box will loosen violently and collapse to the bottom of the material box because it is no longer supported by the inclined plate. During the collapse, the material will collide with each other and cause damage. The anti-collision effect is not good.

[0004] 2. In the existing technology, the material needs to slide along the inclined plate into the hopper. Although this process relies on slowing down the falling speed of the material to achieve a certain anti-collision effect, the time it takes to fill the hopper will also be longer after the falling speed of the material is slowed down, thus resulting in a significant reduction in production efficiency. Utility Model Content

[0005] This utility model provides an auxiliary feeding mechanism at the outlet of a normalizing furnace, which can solve the problems of poor workpiece collision prevention and reduced production efficiency in existing feeding devices.

[0006] This application provides the following technical solution: an auxiliary feeding mechanism at the outlet of a normalizing furnace, including a buffer structure disposed at the outlet of the normalizing furnace; The buffer structure includes a buffer plate rotatably connected to both sides of the normalizing furnace and a tension spring located on both sides of the buffer plate. One end of the tension spring is fixed to both sides of the buffer plate, and the other end of the tension spring is fixed to both sides of the normalizing furnace. A material frame is provided below the buffer plate, and the end of the buffer plate is located above the material frame and extends into the material frame to one-third of the horizontal distance from the opening of the material frame.

[0007] Beneficial effects: 1. Improved anti-collision effect. In existing technologies, the inclined plate needs to extend into the bottom of the material box. After the material is loaded to a certain extent, the inclined plate needs to retract to avoid space in the material box. When retracting, the unsupported material will collapse violently, causing collisions and injuries between materials. This solution uses a buffer plate and tension spring structure, with the end extending to one-third of the horizontal distance of the upper opening of the material frame. It does not extend into the material frame at any time, and does not occupy the material frame space as in existing technologies. Therefore, it will not cause material collapse and injury. On the other hand, when the workpiece falls from the furnace opening onto the buffer plate, the buffer plate will rotate downward synchronously with the workpiece's gravity around the rotation point. The elastic force generated by the tension spring makes the buffer plate apply resistance to the workpiece, thereby slowing down the falling speed of the workpiece and reducing the speed at which the workpiece falls into the material frame. According to the momentum theorem, after the final velocity decreases, the instantaneous impact force of the workpiece will also decrease, thereby preventing the workpiece from colliding and causing injury, and improving the anti-collision effect.

[0008] 2. Improved Production Efficiency. Existing technologies rely on the slow, long-path sliding of the inclined plate to buffer the falling speed of the workpiece. However, this prolongs the time it takes for the workpiece to fall into the material frame, increasing loading time and requiring materials to wait longer before being fed into the next process, thus reducing production efficiency. In contrast, the buffer plate in this solution not only uses the elasticity of the tension spring to create resistance to the falling workpiece, slowing its descent and reducing its falling height after leaving the buffer plate, but also shortens the falling path, thereby reducing the impact force. Furthermore, the workpiece's descent after leaving the buffer plate is not interfered with by it. Therefore, compared to the existing technology where the inclined plate supports the workpiece throughout its sliding motion, this solution reduces the falling time for each workpiece. In long-term industrial use, this will significantly reduce loading time and improve production efficiency.

[0009] Furthermore, when the tension spring is in its natural state, the buffer plate is in a horizontal state.

[0010] Beneficial effects: The horizontal buffer plate can form a close initial contact relationship with the outlet of the normalizing furnace with a low drop. After the workpiece is discharged from the furnace opening, it can fall directly onto the horizontal buffer plate, avoiding the problem of the workpiece falling from the furnace opening due to the initial tilt of the buffer plate. This reduces the impact kinetic energy of the workpiece at the moment of contact with the buffer plate from the source, maintains a stable feeding buffer rhythm, and improves the feeding buffer stability.

[0011] Furthermore, it also includes a lifting mechanism fixed on both sides of the normalizing furnace. The lifting mechanism includes cylinders fixed on both sides of the normalizing furnace and a sliding plate fixed to the end of the cylinder telescopic rod. The sliding plate is slidably connected to both sides of the normalizing furnace. The buffer plate is rotatably connected to the sliding plate, and the end of the tension spring away from the upper surface of the buffer plate is fixed to the sliding plate.

[0012] Beneficial effects: Because the buffer plate slows down the falling speed of the workpieces, the time it takes for each workpiece to fall completely into the material frame is slower than when it falls freely into the frame. Over time, this will take longer to fill each frame and longer to transport the filled frame to the next process, thus dragging down the overall processing efficiency between processes. The lifting mechanism works by using a cylinder to move the buffer plate towards the bottom of the frame as the workpiece slides off the buffer plate, thereby reducing the height of the workpiece's fall point after it leaves the buffer plate. This utilizes the time during which the workpiece is buffered, reducing the time it takes for the workpiece to fall into the frame after leaving the buffer plate, and filling a frame faster, thus enhancing processing efficiency.

[0013] Furthermore, the slide plate is also equipped with a button switch, and the bottom of the buffer plate is fixed with a protrusion, which is used to control the cylinder action by touching the button switch.

[0014] Beneficial effects: When there is a workpiece on the buffer plate, the buffer plate will swing downward, so that the protrusion can swing onto the button switch, thereby triggering the cylinder to move the slider and the buffer plate downward. During the buffering and deceleration of the workpiece on the buffer plate, the height of the buffer plate from the bottom of the material frame also decreases. In this way, when the workpiece finishes buffering and leaves the buffer plate, it will fall into the material frame at a lower point, thereby saving falling time and improving loading efficiency. Furthermore, the two sides of the normalizing furnace are also provided with a height adjustment mechanism. The height adjustment mechanism includes a conical pad fixed on the ground on both sides of the normalizing furnace, a screw fixed above the conical pad, a hexagonal nut threadedly connected to the screw, and a support block slidably connected to the upper end of the screw. The bottom of the cylinder is fixed on the support block.

[0015] Beneficial effects: By using a wrench to tighten the hexagonal nut, the height of the support block can be adjusted, thereby flexibly adjusting the initial height of the cylinder, slider, and buffer plate. This allows for adjustment of the height difference between the buffer plate and the bottom of the material frame according to different heights, avoiding excessive initial impact, thus optimizing the buffer path and improving the adaptability of the buffer structure. Attached Figure Description

[0016] Figure 1 This is the main structural view of the present invention.

[0017] Figure 2 for Figure 1 The left view.

[0018] Figure 3 This is the front view of Embodiment 2.

[0019] Figure 4 for Figure 3 A magnified view of A in the middle.

[0020] Figure 5 This is the front view of Embodiment 3.

[0021] Figure 6 for Figure 5 A magnified view of B. Detailed Implementation

[0022] The following detailed description illustrates the specific implementation method: The markings in the accompanying drawings of the instruction manual include: 1. normalizing furnace, 2. workpiece, 3. vertical plate, 4. conveyor belt, 5. tension spring, 6. buffer plate, 7. material frame, 8. slide plate, 9. cylinder, 10. push button switch, 11. protrusion, 12. support block, 13. hexagonal nut, 14. screw, and 15. conical pad.

[0023] Example 1 like Figure 1 and Figure 2 As shown, the auxiliary feeding mechanism at the outlet of the normalizing furnace includes a buffer structure located at the outlet of the normalizing furnace 1. The buffer structure includes buffer plates 6 rotatably connected to both sides of the normalizing furnace 1 and tension springs 5 ​​located on both sides of the buffer plates 6. Vertical plates 3 are welded and fixed to both sides of the normalizing furnace 1. In this embodiment, the ends of the buffer plates 6 are pivotally connected to the vertical plates 3. Pins are fixedly provided on both edges of the buffer plates 6 and on the vertical plates 3 on both sides of the normalizing furnace 1. Ring grooves are formed on the pin shanks. One end of the tension spring 5 hooks into the ring grooves of the pins located on both sides of the buffer plates 6, and the other end of the tension spring 5 hooks into the ring grooves of the pins on both sides of the vertical plates 3. A material frame 7 is provided below the buffer plates 6. The end of the buffer plates 6 is located above the material frame 7 and extends into the material frame 7 at a horizontal distance of one-third of its opening. The buffer plates 6 are held in place by the tension springs 5. When there is no workpiece 2 on the buffer plates 6, the tension springs 5 ​​are in a naturally stretched state, at which time the buffer plates 6 are in a horizontal state.

[0024] The operating method of this feeding mechanism is as follows: When workpiece 2 falls from the furnace opening onto buffer plate 6, buffer plate 6 rotates synchronously downwards around the pivot point with the gravity of workpiece 2. The elastic force generated by the tension spring 5 causes buffer plate 6 to exert resistance on workpiece 2, thereby slowing down the falling speed of workpiece 2 and reducing the speed at which workpiece 2 falls into the material frame 7. According to the momentum theorem, after the final velocity decreases, the instantaneous impact force of workpiece 2 will also decrease, thus preventing workpiece 2 from being damaged by impact and improving the anti-damage effect. Existing technology relies on the slow sliding of the inclined plate along a long path to buffer the falling speed of workpiece 2, but this prolongs the time it takes for workpiece 2 to fall into the material frame 7, resulting in a longer loading time. The material then needs to wait longer before being sent to the next process, reducing production efficiency. The buffer plate 6 in this solution not only uses the elastic force of the tension spring 5 to create resistance to the falling workpiece 2, slowing down the falling speed of the workpiece 2, but also reduces the falling height of the workpiece 2 after it leaves the buffer plate 6, shortening the falling path, thereby reducing the impact force when the workpiece 2 falls. Moreover, the falling process of the workpiece 2 after leaving the buffer plate 6 will not be interfered with by the buffer plate 6. Therefore, compared with the existing technology where the inclined plate supports and slides the workpiece 2 throughout the entire process, this solution can reduce the falling time of each workpiece 2. In long-term industrial use, it will significantly reduce the loading time and improve production efficiency.

[0025] Example 2 like Figure 3 and Figure 4 As shown, the difference between this solution and Embodiment 2 is that the feeding mechanism also includes a lifting mechanism fixed on both sides of the normalizing furnace 1. The lifting mechanism includes a cylinder 9 fixed with screws on the upright plates 3 on both sides of the normalizing furnace 1 and a sliding plate 8 threadedly fixed to the end of the telescopic rod of the cylinder 9. The upright plate 3 is provided with a sliding groove, and the sliding plate 8 is slidably connected in the sliding groove. The end of the buffer plate 6 is pivotally connected to the sliding plate 8. A pin is fixed on the sliding plate 8, and annular grooves are opened on the pin rod. The end of the tension spring 5 away from the upper surface of the buffer plate 6 is hooked in the pin annular groove on the sliding plate 8. The slide plate 8 is also equipped with a push button switch 10, and the bottom of the buffer plate 6 is fixed with a protrusion 11. When the workpiece 2 falls onto the buffer plate 6, the rotation of the buffer plate 6 will drive the protrusion 11 to rotate, thereby causing the protrusion 11 to touch the push button switch 10. In this example, a PLC controller is provided, and the air pipe of the cylinder 9 is equipped with a solenoid valve. The controller is electrically connected to the push button switch 10 and the solenoid valve. When the protrusion 11 triggers the push button switch 10, the solenoid valve can be controlled to open or close through the controller, thereby achieving the extension and retraction action of the cylinder 9 telescopic rod.

[0026] The advantage of this embodiment is that, because the buffer plate 6 slows down the falling speed of the workpiece 2, the time it takes for each workpiece 2 to fall completely into the material frame 7 is slower than when it falls freely into the material frame 7. In the long run, the time it takes to fill each frame will be longer, and the time it takes to transport the filled material frame 7 to the next process will also be longer, which will drag down the overall processing efficiency between processes. The function of the lifting mechanism is to use the cylinder 9 to drive the buffer plate 6 to move towards the bottom of the material frame 7 during the process of the workpiece 2 sliding from the buffer plate 6, thereby reducing the height of the falling point of the workpiece 2 after it leaves the buffer plate 6. The time of the buffering process of the workpiece 2 is utilized, so the time it takes for the workpiece 2 to fall into the material frame 7 after leaving the buffer plate 6 is reduced, and a basket of materials is filled faster, thereby further enhancing and improving processing efficiency.

[0027] Example 3 like Figure 5 and Figure 6 As shown, the furnace 1 is equipped with height adjustment mechanisms on both sides. These mechanisms include conical pads 15 fixed to the ground on both sides of the furnace 1, a screw 14 welded and fixed above the conical pads 15, a hexagonal nut 13 threaded onto the screw 14, and a support block 12 slidably connected to the upper end of the screw 14. The bottom of the cylinder 9 is fixed above the support block 12. The conical pads 15 can be fixed to the ground by using expansion bolts. The support block 12 has a sliding hole in its center, corresponding to the outer diameter of the screw 14.

[0028] The advantage of this example is that by using a wrench to tighten the hexagonal nut 13, the hexagonal nut 13 moves upward, raising the support block 12; conversely, by lowering the hexagonal nut 13, the support block 12 falls. This allows for flexible adjustment of the initial height of the cylinder 9, the slider, and the buffer plate 6. Consequently, the height difference between the buffer plate 6 and the bottom of the material frame 7 can be adjusted according to different heights of the material frame 7, avoiding excessive initial impact, thus optimizing the buffer path and improving the adaptability of the buffer structure. The above is merely an embodiment of this utility model. This utility model is not limited to the field involved in this embodiment. Common knowledge such as specific structures and characteristics in the solution are not described in detail here. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These should also be considered within the scope of protection of this utility model, and will not affect the implementation effect of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An auxiliary feeding mechanism at the outlet of a normalizing furnace, characterized in that: This includes a buffer structure located at the outlet of the normalizing furnace; The buffer structure includes a buffer plate rotatably connected to both sides of the normalizing furnace and a tension spring located on both sides of the buffer plate. One end of the tension spring is fixed to both sides of the buffer plate, and the other end of the tension spring is fixed to both sides of the normalizing furnace. A material frame is provided below the buffer plate, and the end of the buffer plate is located above the material frame and extends into the material frame to one-third of the horizontal distance from the opening of the material frame.

2. The auxiliary feeding mechanism at the outlet of the normalizing furnace according to claim 1, characterized in that: When the tension spring is in its natural state, the buffer plate is in a horizontal state.

3. The auxiliary feeding mechanism at the outlet of the normalizing furnace according to claim 2, characterized in that: It also includes a lifting mechanism fixed on both sides of the normalizing furnace. The lifting mechanism includes cylinders fixed on both sides of the normalizing furnace and a sliding plate fixed to the end of the cylinder telescopic rod. The sliding plate is slidably connected to both sides of the normalizing furnace. The buffer plate is rotatably connected to the sliding plate, and the end of the tension spring away from the upper surface of the buffer plate is fixed to the sliding plate.

4. The auxiliary feeding mechanism at the outlet of the normalizing furnace according to claim 3, characterized in that: The slide plate is also equipped with a button switch, and a protrusion is fixed to the bottom of the buffer plate. The protrusion is used to control the cylinder action by touching the button switch.

5. The auxiliary feeding mechanism at the outlet of the normalizing furnace according to claim 4, characterized in that: The normalizing furnace is also equipped with a height adjustment mechanism on both sides. The height adjustment mechanism includes a conical pad fixed on the ground on both sides of the normalizing furnace, a screw fixed on the conical pad, a hexagonal nut threaded on the screw, and a support block slidably connected to the upper end of the screw. The bottom of the cylinder is fixed on the support block.

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