Thermal treatment quenching and tempering furnace

Abstract

The invention relates to a thermal treatment hardening and tempering furnace, and relates to the technical field of kilns, the thermal treatment hardening and tempering furnace comprises a heating furnace system, a plurality of conveyors, a plurality of random deflection systems and a water spray cooling system, the heating furnace system is connected with the water spray cooling system through the conveyors, and the conveyors are arranged at the input end of the heating furnace system and the output end of the heating furnace system; the random deflection system comprises a deflection base plate, a deflection disc and a deflection device, a rotation groove is formed in the lower side of the geometric center of the deflection base plate, a rotation cone is arranged in the rotation center of the deflection disc, a rotation gap is formed between the deflection base plate and the deflection disc under the heightening effect of the rotation cone, and the deflection disc swings on the deflection base plate. The deflection device pushes the workpiece, so that the workpiece swings in the deflection disc in a deflection mode, and heating and cooling of the workpiece are smooth.

Description

Technical Field

[0001] The present invention relates to the technical field of furnaces, and particularly to a heat treatment and conditioning furnace. Background Art

[0002] ‌The heat treatment and conditioning furnace‌ is one of the commonly used equipment in the metal processing industry, mainly used for quenching and tempering heat treatment of metal materials to improve their mechanical properties and service life. The quenching and tempering heat treatment furnace makes the metal material undergo a phase change by heating and holding, thereby improving its structure and properties. Its working principle is to control factors such as heating temperature, holding time, and cooling rate to enable the metal material to achieve the expected mechanical and physical properties.

[0003] The quenching and tempering heat treatment furnace mainly consists of a furnace body, a heating system, a control system, a furnace door, and a furnace lining. The furnace body is usually made of steel structure or refractory material structure, with good high-temperature resistance and heat preservation performance. The heating system provides heat energy through electricity, gas, or fuel oil, etc., to make the temperature in the furnace reach the required treatment temperature. The intelligent control system of the control system can achieve precise control of parameters such as the temperature in the furnace and the heating time. The furnace door usually adopts a water-cooled structure to ensure sealing performance and service life. The furnace lining plays a role in heat preservation and heat insulation.

[0004] When placing metal materials in the furnace, attention should be paid to uniform distribution to avoid local overheating or overcooling. There is an uneven phenomenon in the heating and cooling of workpieces in the existing heat treatment and conditioning furnace, which affects the heat treatment effect. When the existing technology heat-treats gear shaft workpieces and gear workpiece blanks, they are often directly placed on a metal tray and sent into the furnace body for heating, and the workpieces are prone to uneven heating. Summary of the Invention

[0005] To overcome the technical defects existing in the prior art, the present invention provides a heat treatment and conditioning furnace, enabling the workpieces to be heated and cooled evenly.

[0006] The technical solution adopted by the present invention is: A heat treatment and conditioning furnace, including a heating furnace system, a plurality of conveyors, a plurality of random deflection systems, and a water spray cooling system. The heating furnace system and the water spray cooling system are connected by conveyors. Conveyors are provided at both the input end and the output end of the heating furnace system. The random deflection system includes a deflection chassis, a deflection disk, and an inclination device. A rotary groove is provided at the geometric center of the deflection chassis. A rotary cone pressing on the rotary groove is provided below the rotary center of the deflection disk. A rotary gap is formed between the deflection chassis and the deflection disk under the elevation of the rotary cone. The deflection disk swings on the deflection chassis. The inclination device pushes the workpiece to make the workpiece deflect and swing within the deflection disk.

[0007] Preferably, the heating furnace system comprises a heating furnace body and a plurality of hatch lifting devices, each of the hatch lifting devices is installed at a furnace inlet and a furnace outlet of the heating furnace body, and the heating furnace body is installed with a plurality of gas guns.

[0008] Preferably, the door lifting device includes a door lifting plate, a door lifting cylinder and a plurality of door lifting rails, the door lifting plate is slidably mounted on the door lifting rails via a slider, the door lifting cylinder is mounted on the heating furnace body, the door lifting cylinder is transmission-connected to the door lifting plate, and the door lifting plate is mounted on the corresponding furnace inlet and furnace outlet.

[0009] Preferably, the conveyor includes conveying rollers and a conveying frame, each of the conveying rollers is rotatably mounted on the conveying frame, each of the conveying rollers is driven by a chain, and the chain is connected to a sprocket on an output end of an external conveying motor.

[0010] Preferably, the water spray cooling system comprises a water spray tunnel, and a plurality of water spray outlets are provided on the top and sides of the water spray tunnel.

[0011] Preferably, the revolving groove is a cylindrical groove.

[0012] Preferably, the rotating cone is conical.

[0013] Preferably, the deflection device includes a push ring and a tilting cylinder, the lower end of the push ring is provided with a guide rod that slides with the tilting cylinder, the tilting cylinder and the guide rod can be fixed to each other, the tilting cylinder can be rotatably installed on the deflection disk, and the tilting cylinder and the deflection disk can be fixed to each other.

[0014] Preferably, the deflection device includes a push cone block and a push adaptation plate, a conical groove is formed on the upper side of the rotation center position of the deflection disk, the lower side of the push cone block is adapted to the conical groove, the lower side of the push adaptation plate is provided with a swing blind hole adapted to the upper side of the push cone block, the push adaptation plate is placed on the push cone block through the swing blind hole, and a workpiece is placed on the push adaptation plate.

[0015] The beneficial effects of the present invention are: The heating furnace system and the water spray cooling system are connected by a conveyor. The workpieces are conveyed by the conveyor. There are conveyors at both the input end and the output end of the heating furnace system. The workpieces are placed on the random deflection system. The workpieces enter and exit the heating furnace system and the water spray cooling system through the conveyors. The random deflection system includes a deflection chassis, a deflection plate, and an inclination device. A rotary groove is provided at the geometric center of the deflection chassis. A rotary cone that presses on the rotary groove is provided on the lower side of the rotary center of the deflection plate. There is a rotary gap between the deflection chassis and the deflection plate under the elevation of the rotary cone. The deflection plate swings on the deflection chassis, making the deflection plate heat evenly. The inclination device pushes the workpiece, causing the workpiece to deflect and swing within the deflection plate. Under the pushing action of the inclination device, when the workpiece is conveyed by the conveyor and during the heating and cooling processes in the heating furnace system and the water spray cooling system, it is deflected by the action of water flow or gas, making the heating and cooling of the workpiece smooth. Brief Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of the present invention.

[0017] Figure 2 is Figure 1 The enlarged schematic diagram at position A in

[0018] Figure 3 It is an exploded structural schematic diagram of the random deflection system in Embodiment 1.

[0019] Figure 4 It is an assembled structural schematic diagram of the random deflection system in Embodiment 1.

[0020] Figure 5 It is a schematic diagram of the installation relationship between the deflection plate and the inclination device in Embodiment 1.

[0021] Figure 6 It is a sectional schematic diagram of the random deflection system in Embodiment 1.

[0022] Figure 7 It is a sectional schematic diagram of the random deflection system in Embodiment 2.

[0023] Figure 8 is Figure 7 The enlarged schematic diagram at position B in

[0024] Description of the Reference Numerals: 1. Heating furnace system; 11. Heating furnace body; 12. Hatch lifting device; 121. Hatch lifting cylinder; 122. Hatch lifting plate; 123. Hatch lifting rail; 2. Conveyor; 3. Random deflection system; 31. Deflection chassis; 311. Rotary groove; 32. Deflection plate; 321. Rotary cone; 322. Conical groove; 33. Oblique device; 331. Thrust ring; 332. Tilt cylinder; 333. Thrust cone block; 334. Thrust adaptor plate; 3341. Swing blind hole; 34. Rotary seam; 35. Center of gravity adjustment block; 36. Guide rod; 4. Water spray cooling system. Specific implementation manner

[0025] Embodiment 1 The present invention will be further described below with reference to the accompanying drawings: As Figure 1 — Figure 6 shown, for processing gear shaft workpieces, the present embodiment provides a heat treatment quenching and tempering furnace, which includes a heating furnace system 1, a plurality of conveyors 2, a plurality of random deflection systems 3 and a water spray cooling system 4. The heating furnace system 1 and the water spray cooling system 4 are connected by the conveyors 2. The workpieces are conveyed by the conveyors 2. Conveyors 2 are provided at both the input end and the output end of the heating furnace system 1. The workpieces are placed on the random deflection system 3. The workpieces enter and exit the heating furnace system 1 and the water spray cooling system 4 through the respective conveyors 2. The random deflection system 3 includes a deflection chassis 31, a deflection plate 32 and an oblique device 33. A rotary groove 311 is provided at the geometric center of the deflection chassis 31. A rotary cone 321 that presses on the rotary groove 311 is provided below the rotary center of the deflection plate 32. Since the contact between the rotary groove 311 and the rotary cone 321 is a point contact, there is a rotary seam 34 between the deflection chassis 31 and the deflection plate 32 under the elevation of the rotary cone 321. The deflection plate 32 swings on the deflection chassis 31, making the deflection plate 32 uniformly heated. The oblique device 33 pushes the workpiece, causing the workpiece to deflect and swing within the deflection plate 32. Under the pushing action of the oblique device 33, during the conveying process by the conveyor 2 and during the heating and cooling in the heating furnace system 1 and the water spray cooling system 4, the workpiece is deflected under the action of water flow or gas flow, changing the contact position of the workpiece, making the heating and cooling of the workpiece smooth.

[0026] Specifically, the heating furnace system 1 includes a heating furnace body 11 and a plurality of hatch lifting devices 12. Each hatch lifting device 12 is installed at the furnace inlet and the furnace outlet of the heating furnace body 11. A plurality of gas guns are installed on the heating furnace body 11 to heat the workpiece and realize heat treatment.

[0027] Specifically, the door lifting device 12 includes a door lifting plate 122, a door lifting cylinder 121 and a plurality of door lifting rails 123. The door lifting plate 122 is slidably installed on the door lifting rail 123 through a slider. The door lifting cylinder 121 is installed on the heating furnace body 11. The door lifting cylinder 121 is transmission-connected with the door lifting plate 122. The door lifting plate 122 is installed on the corresponding furnace body inlet and furnace body outlet. The door lifting cylinder 121 drives the door lifting plate 122 to rise and fall, thereby opening and closing the heating furnace body 11, preventing heat loss, and having an energy-saving effect.

[0028] Specifically, the conveyor 2 includes conveying rollers and a conveying frame, each conveying roller is rotatably installed on the conveying frame, each conveying roller is driven by a chain, and the chain is connected to the sprocket on the output end of the external conveying motor to realize the conveyance of the random deflection system 3 and the workpiece carried by the random deflection system 3.

[0029] Specifically, the water spray cooling system 4 includes a water spray tunnel, and a plurality of water spray ports are provided on the top and sides of the water spray tunnel for cooling the workpieces. A PVC door curtain is provided at the outlet of the water spray tunnel to prevent water mist from leaking and spraying out to affect the humidity of the workshop.

[0030] Specifically, the rotating groove 311 is a cylindrical groove, the rotating cone 321 is conical, and the height of the rotating cone 321 is higher than the depth of the cylindrical groove, thereby generating a rotating gap 34. The rotating gap 34 provides space for the rotation of the deflection disk 32. Under the lifting effect of the rotating cone 321, the rotating cone 321 is in point contact with the deflection chassis 31. During the transportation of the deflection chassis 31, the deflection disk 32 is able to swing on the deflection chassis 31, and the cylindrical groove limits the lateral position of the rotating cone 321 to prevent it from detaching.

[0031] The cam 332 is fixed to the workpiece 32 by a screw thread, and the cam 332 is screwed to the workpiece 32 so that the workpiece 32 can be rotated to rotate.

[0032] Please note that Figure 6As shown, the contact position between the gear shaft workpiece and the offset turntable 32 is the tooth surface position, which is a key part in the high-temperature tempering step of the quenching and tempering treatment. Therefore, when most of the tooth surface has been lifted away from the offset turntable 32, a center of gravity adjustment block 35 can be further arranged inside the offset turntable 32. The side of the center of gravity adjustment block 35 close to the gear shaft workpiece is thinner than the side away from the gear shaft workpiece, thereby maximizing the smooth flow of heat in the furnace and reducing the influence on the temperature control of the gear shaft workpiece. More importantly, by setting center of gravity adjustment blocks 35 of different sizes, the center of gravity position of the gear shaft workpiece can be controlled, enabling the offset turntable 32 to rotate and swing smoothly.

[0033] Embodiment 2 For processing gear-like workpieces, such as Figure 1 , Figure 2 , Figure 7 and Figure 8 As shown, the difference between this embodiment and Embodiment 1 is only that the skew device 33 includes a thrust cone 333 and a thrust adaptor plate 334. A conical groove 322 is formed above the center of rotation position of the offset turntable 32. The lower side of the thrust cone 333 is adapted to the conical groove 322. A swing blind hole 3341 adapted to the upper side of the thrust cone 333 is provided on the lower side of the thrust adaptor plate 334. The thrust adaptor plate 334 is placed on the thrust cone 333 through the swing blind hole 3341. When the workpiece is placed on the thrust adaptor plate 334, due to the point contact fit between the swing blind hole 3341 and the thrust cone 333, the gear-like workpiece can swing on the offset turntable 32 during transportation, changing the contact position of the workpiece and achieving uniform heating. To facilitate the formation of the conical groove 322, the offset turntable 32 is formed with the conical groove 322 and the rotary cone 321 simultaneously by stamping.

[0034] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. Heat treatment quenching and tempering furnace, characterized in that It includes a heating furnace system, several conveyors, several random deflection systems and a water spray cooling system. The heating furnace system and the water spray cooling system are connected by a conveyor. The input end and the output end of the heating furnace system are both provided with conveyors. The random deflection system includes a deflection chassis, a deflection disk and a deflection device. A rotation groove is provided at the geometric center of the deflection chassis. A rotation cone is provided on the lower side of the rotation center of the deflection disk and is pressed on the rotation groove. A rotation gap is provided between the deflection chassis and the deflection disk due to the padding effect of the rotation cone. The deflection disk swings on the deflection chassis. The deflection device pushes the workpiece so that the workpiece deflects and swings in the deflection disk.

2. The heat treatment and quenching and tempering furnace according to claim 1, characterized in that, The heating furnace system comprises a heating furnace body and a plurality of hatch lifting devices, each of the hatch lifting devices is installed at the furnace inlet and the furnace outlet of the heating furnace body, and the heating furnace body is installed with a plurality of gas guns.

3. The heat treatment and quenching and tempering furnace according to claim 2, characterized in that, The door lifting device includes a door lifting plate, a door lifting cylinder and a plurality of door lifting rails. The door lifting plate is slidably mounted on the door lifting rails via a slider. The door lifting cylinder is mounted on a heating furnace body. The door lifting cylinder is transmission-connected to the door lifting plate. The door lifting plate is mounted on the corresponding furnace body inlet and furnace body outlet.

4. The heat treatment and quenching and tempering furnace according to claim 1, wherein The conveyor comprises a conveying roller and a conveying frame, each of the conveying rollers is rotatably mounted on the conveying frame, each of the conveying rollers is driven by a chain, and the chain is connected to a sprocket on the output end of an external conveying motor.

5. The heat treatment and quenching and tempering furnace according to claim 1, characterized in that, The water spray cooling system comprises a water spray tunnel, and a plurality of water spray ports are arranged on the top and the side of the water spray tunnel.

6. The heat treatment and quenching and tempering furnace according to claim 1, wherein The revolving groove is a cylindrical groove.

7. The heat treatment and quenching and tempering furnace according to claim 1, characterized in that The rotating cone is a cone.

8. The heat treatment and quenching and tempering furnace according to claim 1, characterized in that, The deflection device includes a push ring and a tilting cylinder. The lower end of the push ring is provided with a guide rod that slides with the tilting cylinder. The tilting cylinder and the guide rod can be fixed to each other. The tilting cylinder can be rotatably installed on the deflection disk. The tilting cylinder and the deflection disk can be fixed to each other.

9. The heat treatment and quenching and tempering furnace according to claim 1, characterized in that, The deflection device includes a push cone block and a push adaptation plate. A conical groove is formed on the upper side of the rotation center position of the deflection disk. The lower side of the push cone block is adapted to the conical groove. The lower side of the push adaptation plate is provided with a swing blind hole adapted to the upper side of the push cone block. The push adaptation plate is placed on the push cone block through the swing blind hole, and a workpiece is placed on the push adaptation plate.

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