Sintering furnace device adaptive to powder metallurgy processing

Abstract

The invention discloses a sintering furnace device adaptive to powder metallurgy processing, which relates to the technical field of powder metallurgy processing equipment, and comprises a sintering furnace box used for performing high-temperature sintering treatment on a powder metallurgy material; and a conveying mechanism. According to the sintering furnace device suitable for powder metallurgy machining, when the tray moves to the door mechanism, the inclined face of the frame makes contact with a roller of the lifting assembly, a vertical rod is pushed to ascend, a supporting plate is driven to enable a connecting plate to ascend, a telescopic frame is unfolded, a door plate ascends to open a furnace door, and when the tray leaves, components are reset under gravity, and the door plate descends to be closed; according to the process that the tray and the mechanism cooperatively control opening and closing of the furnace door, an independent electric driving device and various sensors which a traditional roller furnace depends on are abandoned, electrical elements are prevented from working in the high-temperature environment of the furnace opening, and the problem that the service life of the electrical elements is affected by high temperature is effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of powder metallurgy processing equipment, and specifically to a sintering furnace device adapted to powder metallurgy processing. Background Art

[0002] Powder metallurgy is a process technology for producing metal powders or using metal powders or mixtures of metal powders and non-metal powders as raw materials, and manufacturing metal materials, composite materials, and various types of products through shaping and sintering. The powder metallurgy sintering furnace is a heat treatment equipment, mainly for high-temperature sintering of the formed metal powder model.

[0003] Currently, in powder metallurgy sintering production, due to the characteristics of continuous production, the roller hearth furnace can realize the automatic transmission of materials in the furnace, greatly improving production efficiency and being widely used. However, the existing roller hearth furnace still has the following problems in actual use:

[0004] 1. To prevent heat loss in the furnace cavity during the sintering process, furnace doors are usually set at the inlet and outlet of the furnace body. However, in the traditional roller hearth furnace, the control of the furnace door opening and closing often relies on independent electrical drive devices and various sensors. However, the high-temperature environment at the furnace opening seriously affects the service life of these electrical components.

[0005] 2. In the continuous sintering process, each opening of the furnace door will cause a large amount of heat to overflow, which not only leads to waste of energy, increases production costs, but also causes temperature fluctuations in the furnace, affecting the sintering quality of powder metallurgy products.

[0006] Therefore, we propose a sintering furnace device adapted to powder metallurgy processing to solve the problems mentioned above. Summary of the Invention

[0007] The purpose of the present invention is to provide a sintering furnace device adapted to powder metallurgy processing to solve the problems in the above background art that in the traditional roller hearth furnace, the control of the furnace door opening and closing often relies on independent electrical drive devices and various sensors to achieve, however, the high-temperature environment at the furnace opening seriously affects the service life of these electrical components, and at the same time, a large amount of heat overflows when the furnace door is opened, wasting energy and affecting the sintering quality of products.

[0008] To achieve the above purpose, the present invention provides the following technical solutions: A sintering furnace device adapted to powder metallurgy processing, including:

[0009] A sintering furnace box for high-temperature sintering treatment of powder metallurgy materials;

[0010] A conveying mechanism, cooperatively arranged with the sintering furnace box, for conveying the materials to be sintered into the sintering furnace box and conveying the sintered materials out of the sintering furnace box after sintering is completed;

[0011] The conveying mechanism includes a conveying frame which is arranged along the length direction of the sintering furnace box. The conveying frame passes through the furnace cavity from the upstream of the sintering furnace box and extends to the downstream. A plurality of conveying rollers are rotatably arranged inside the conveying frame, and the conveying rollers are arranged along the width direction of the sintering furnace box. Six limiting plates are arranged on the top surface of the conveying frame at the feeding port and the discharging port of the sintering furnace box. The six limiting plates are divided into two groups, with three in each group. The limiting plates are arranged along the length direction of the sintering furnace box, and a plurality of the limiting plates all extend towards the inner side of the conveying frame. Tooth rollers are fixedly sleeved on the outer walls of a plurality of the conveying rollers located below the limiting plates.

[0012] The door mechanism, the number of the door mechanisms is set to two, and the two door mechanisms are respectively arranged at the feeding port and the discharging port of the sintering furnace box. The door mechanism includes a housing assembly, and two symmetrical on-off components are arranged on the housing assembly. Two symmetrical telescopic components are arranged on both sides of the on-off component along the width direction of the sintering furnace box. Two symmetrical lifting components are arranged on both sides of the on-off component along the length direction of the sintering furnace box. One of the lifting components is arranged outside the housing assembly, and the other lifting component is arranged inside the housing assembly. When the lifting component rises, the extending action of the telescopic component can be realized, and the rising action of the on-off component can be realized through the extending action of the telescopic component.

[0013] The lifting component includes two vertical rods which are placed above the tooth rollers. A roller is rotatably arranged at the bottom of the vertical rod. A U-shaped frame is installed between the top surfaces of the two vertical rods, and supporting plates are fixedly installed at positions close to the bottom on the outer surfaces of both sides of the U-shaped frame.

[0014] The tray is placed on the conveying rollers and is used for loading materials. The conveying of the tray can be realized through the conveying mechanism. When the tray is conveyed and contacts with the lifting component, the rising action of the lifting component can be realized.

[0015] The tray includes a frame. A clamping groove matched with the tooth roller is formed on the bottom surface of the frame, and inclined surfaces matched with the rollers are formed at the four corners of the top surface of the frame.

[0016] Preferably, a plurality of first bevel gears are arranged on the outer side of the conveying frame. The number of the first bevel gears is the same as the number of the conveying rollers. Each first bevel gear is respectively connected with each conveying roller through a shaft rod. A rotating shaft is further arranged on the outer side of the conveying frame. The rotating shaft is arranged along the length direction of the conveying frame. A plurality of shaft rod seats are movably sleeved on the outer wall of the rotating shaft, and the shaft rod seats are fixedly installed on the outer wall of the conveying frame. A second bevel gear meshed with the first bevel gear is fixedly sleeved on the outer wall of the rotating shaft, and a first synchronous pulley is fixedly installed at one end of the rotating shaft.

[0017] Preferably, the conveying mechanism further includes a motor. A second synchronous pulley is fixedly installed at the output shaft end of the motor, and a synchronous belt is arranged between the second synchronous pulley and the first synchronous pulley.

[0018] Preferably, the housing assembly includes an upper housing fixedly installed on the top surface of the conveying frame and a lower housing fixedly installed on the bottom surface of the conveying frame. The outer surfaces of the upper housing and the lower housing are both fixedly connected to the sintering furnace box. Inside the lower housing, limiting frame grooves are symmetrically and fixedly connected. The limiting frame grooves extend into the upper housing through the gaps between adjacent conveying rollers and are fixedly connected to the inner wall of the upper housing. Two door grooves matching the limiting frame grooves are opened at the top of the upper housing. One door groove is located inside the sintering furnace box, and the other door groove is located outside the sintering furnace box.

[0019] Preferably, the on-off component includes a door panel movably arranged inside the door groove, and the door panel extends into the limiting frame groove. A top plate is installed on the top surface of the door panel. The top plate is arranged along the width direction of the sintering furnace box. Side plates are fixedly installed on the outer walls of both sides of the top plate along the width direction. Two first fixing plates are installed on the bottom surface of the side plates. The first fixing plates are arranged along the width direction of the top plate. First straight slots are penetrated through the outer walls of the first fixing plates. The first straight slots are arranged along the length direction of the first fixing plates.

[0020] Preferably, the telescopic component includes a support seat fixedly installed on the outer wall of the upper housing. Second fixing plates are symmetrically installed on the top surface of the support seat. Second straight slots are penetrated through the outer walls of the second fixing plates. The second straight slots are arranged parallel to the first straight slots. Two guide rods are also installed on the top surface of the support seat. The guide rods are arranged vertically. Telescopic frames are provided on the outer surfaces of the opposite sides of the two second fixing plates. The telescopic frames are composed of multiple intersecting rod bodies. Multiple intermediate rods are arranged between the two telescopic frames. The two ends of the intermediate rods respectively movably penetrate through the centers where the rod bodies intersect. Multiple connecting shafts are also arranged between the two telescopic frames. The two ends of the connecting shafts respectively movably penetrate through the edges where the rod bodies intersect.

[0021] Preferably, lower moving rods are fixedly installed on the outer walls of the two intersecting rod bodies at the bottom. The lower moving rods are movably arranged inside the second straight slots. Upper moving rods are fixedly installed on the outer walls of the two intersecting rod bodies at the top. The upper moving rods are movably arranged inside the first straight slots. A connecting plate is fixedly installed on the outer wall of the intermediate rod at the bottom. The connecting plate is slidably connected to the guide rod.

[0022] Preferably, a guide sleeve is slidably sleeved on the outer wall of the vertical rod. The guide sleeve is fixedly connected to the upper housing. A limiting block is fixedly connected to the outer wall of the vertical rod above the guide sleeve. The vertical rod in the lifting component inside the housing assembly slidably penetrates through the inner top surface of the upper housing and extends upward. The support plate extends towards the connecting plate, and the support plate is located below the connecting plate. The support plate is slidably connected to the guide rod.

[0023] Preferably, there are three limiting plates in each group. The two limiting plates on both sides are respectively placed on the outside of the upper shell, and the middle limiting plate is placed on the inside of the upper shell.

[0024] Preferably, a placing plate is fixedly connected to the inner wall of the frame, and the top surface of the frame can contact the bottom surface of the limiting plate extending to the inside of the conveying rack.

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

[0026] 1. When the tray moves to the door mechanism, the inclined surface of its frame contacts the roller of the lifting assembly, pushing the vertical rod to rise, driving the support plate to make the connecting plate rise, the telescopic frame unfolds, and the door panel rises to open the furnace door. When the tray leaves, the components reset under gravity, and the door panel descends to close. This is the process of the tray and the mechanism cooperating to control the opening and closing of the furnace door, abandoning the independent electric drive device and various sensors relied on by the traditional roller hearth furnace, avoiding the operation of electrical components in the high-temperature environment at the furnace mouth, and effectively solving the problem of the influence of high temperature on the service life of electrical components.

[0027] 2. During the process of material input and output, at least one of the door panels of the two on-off components in the door mechanism remains in the closed state, greatly reducing the heat overflow in the furnace, reducing energy waste and production costs, avoiding the temperature fluctuation in the furnace, and effectively ensuring the sintering quality of powder metallurgy products.

[0028] 3. When the tray approaches the door mechanism at the feeding port and reaches the position of the limiting plate, the bottom surface of the limiting plate contacts the top surface of the frame, restricting the tray from up and down directions, effectively preventing it from shaking. At the same time, the cooperation between the toothed roller and the card slot can ensure that the tray does not slip during the movement towards the feeding port of the sintering furnace box, ensuring that the frame can smoothly lift the vertical rod, the stability of the material conveying process. And through the cooperation of the inclined surface and the roller, the friction between the vertical rod and the frame can be effectively reduced, making it easier for the frame to lift the vertical rod, thereby improving the stability of the lifting action of the lifting assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a perspective view of the sintering furnace device adapted to powder metallurgy processing according to the present invention;

[0030] Figure 2 is a schematic diagram of the internal structure of the sintering furnace box of the sintering furnace device adapted to powder metallurgy processing according to the present invention;

[0031] Figure 3 is a schematic diagram of the structure of the conveying mechanism of the sintering furnace device adapted to powder metallurgy processing according to the present invention;

[0032] Figure 4 is a schematic diagram of the extended state of one of the telescopic components of the sintering furnace device adapted to powder metallurgy processing according to the present invention;

[0033] Figure 5 The enlarged view of part A in the sintering furnace device adapted to powder metallurgy processing according to the present invention Figure 4 ;

[0034] Figure 6 The enlarged view of part B in the sintering furnace device adapted to powder metallurgy processing according to the present invention Figure 4 ;

[0035] Figure 7 The schematic structural diagram of the door mechanism of the sintering furnace device adapted to powder metallurgy processing according to the present invention

[0036] Figure 8 The schematic structural diagram of the housing assembly of the sintering furnace device adapted to powder metallurgy processing according to the present invention

[0037] Figure 9 The schematic structural diagram of the on-off component of the sintering furnace device adapted to powder metallurgy processing according to the present invention

[0038] Figure 10 The exploded view of the telescopic component of the sintering furnace device adapted to powder metallurgy processing according to the present invention

[0039] Figure 11 The exploded view of the lifting component of the sintering furnace device adapted to powder metallurgy processing according to the present invention

[0040] Figure 12 The schematic structural diagram of the tray of the sintering furnace device adapted to powder metallurgy processing according to the present invention

[0041] Figure 13 The schematic structural diagram of the limit plate of the sintering furnace device adapted to powder metallurgy processing according to the present invention

[0042] In the figure:

[0043] 1. Sintering furnace box; 2. Conveying mechanism; 21. Conveying frame; 22. Conveying rollers; 23. Tooth rollers; 24. First bevel gear; 25. Rotating shaft; 26. Shaft rod seat; 27. Second bevel gear; 28. First synchronous pulley; 29. Motor; 210. Second synchronous pulley; 211. Synchronous belt; 212. Limit plate; 3. Door mechanism; 31. Housing assembly; 311. Upper housing; 312. Lower housing; 313. Limit frame groove; 314. Door groove; 32. On-off assembly; 321. Door panel; 322. Top plate; 323. Side plate; 324. First fixing plate; 325. First straight slot; 33. Telescopic assembly; 331. Support base; 332. Second fixing plate; 333. Second straight slot; 334. Guide rod; 335. Telescopic frame; 336. Coupling shaft; 337. Intermediate rod; 338. Connecting plate; 339. Lower moving rod; 3310. Upper moving rod; 34. Lifting assembly; 341. Vertical rod; 342. Guide sleeve; 343. Limit block; 344. Roller; 345. U-shaped frame; 346. Support plate; 4. Tray; 41. Frame; 42. Placing plate; 43. Inclined surface; 44. Card slot. Specific embodiments

[0044] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0045] Please refer to Figures 1 - 13 , the present invention provides a technical solution: a sintering furnace device adapted to powder metallurgy processing, including:

[0046] A sintering furnace box 1 for performing high-temperature sintering treatment on powder metallurgy materials;

[0047] A conveying mechanism 2 cooperatively arranged with the sintering furnace box 1 for conveying the materials to be sintered into the sintering furnace box 1 and conveying the sintered materials out of the sintering furnace box 1 after sintering is completed;

[0048] The conveying mechanism 2 includes a conveying frame 21. The conveying frame 21 is arranged along the length direction of the sintering furnace box 1. The conveying frame 21 passes through the furnace cavity from the upstream of the sintering furnace box 1 and extends to the downstream. A plurality of conveying rollers 22 are rotatably arranged inside the conveying frame 21. The conveying rollers 22 are arranged along the width direction of the sintering furnace box 1. Six limiting plates 212 are provided at the top surface of the conveying frame 21 at the feeding port and the discharging port of the sintering furnace box 1. The six limiting plates 212 are divided into two groups, with three in each group. The limiting plates 212 are arranged along the length direction of the sintering furnace box 1. A plurality of limiting plates 212 all extend towards the inner side of the conveying frame 21. Tooth rollers 23 are fixedly sleeved on the outer walls of a plurality of conveying rollers 22 located below the limiting plates 212;

[0049] The door mechanism 3. The number of the door mechanisms 3 is set to two. The two door mechanisms 3 are respectively arranged at the feeding port and the discharging port of the sintering furnace box 1. The door mechanism 3 includes a housing assembly 31. Two symmetrical on-off components 32 are provided on the housing assembly 31. Two symmetrical telescopic components 33 are provided on both sides of the on-off component 32 along the width direction of the sintering furnace box 1. Two symmetrical lifting components 34 are provided on both sides of the on-off component 32 along the length direction of the sintering furnace box 1. One of the lifting components 34 is arranged outside the housing assembly 31, and the other lifting component 34 is arranged inside the housing assembly 31. When the lifting component 34 rises, the telescopic action of the telescopic component 33 can be realized. Through the telescopic action of the telescopic component 33, the rising action of the on-off component 32 can be realized;

[0050] The lifting component 34 includes two vertical rods 341. The vertical rods 341 are placed above the tooth rollers 23. A roller 344 is rotatably arranged at the bottom of the vertical rods 341. A U-shaped frame 345 is installed between the top surfaces of the two vertical rods 341. Support plates 346 are fixedly installed at positions close to the bottom on the outer surfaces of both sides of the U-shaped frame 345;

[0051] The tray 4 is placed on the conveying rollers 22 and is used for loading materials. The conveying of the tray 4 can be realized through the conveying mechanism 2. When the tray 4 is conveyed and contacts the lifting component 34, the rising action of the lifting component 34 can be realized;

[0052] The tray 4 includes a frame 41. A card slot 44 matched with the tooth roller 23 is opened at the bottom surface of the frame 41. Bevels 43 matched with the rollers 344 are opened at the four corners of the top surface of the frame 41.

[0053] Specifically, by placing the material to be sintered on the tray 4, the tray 4 is placed on the conveying rollers 22, the conveying mechanism 2 is started, the conveying rollers 22 rotate, driving the tray 4 to move towards the feed port of the sintering furnace box 1. When the tray 4 reaches the feed port, the inclined surface 43 of the tray 4 contacts the roller 344 of the lifting assembly 34, pushing the lifting assembly 34 to rise, and then driving the telescopic assembly 33 to extend, so that the on-off assembly 32 rises to open the furnace door. After the tray 4 enters, under the action of gravity, each assembly resets to close the furnace door. After sintering is completed, the tray 4 enters and exits from the discharge port in the same way, completing the material transportation and the opening and closing control of the furnace door, abandoning the independent electrical drive devices and various sensors relied on by traditional roller hearth furnaces, avoiding the operation of electrical components in the high-temperature environment at the furnace mouth, and effectively solving the problem of the influence of high temperature on the service life of electrical components.

[0054] Further, when the tray 4 approaches the door mechanism 3 at the feed port and reaches the position of the limit plate 212, the bottom surface of the limit plate 212 contacts the top surface of the frame 41, restricting the tray 4 from above and below, effectively preventing it from shaking. At the same time, the cooperation between the toothed roller 23 and the card slot 44 can ensure that the tray 4 does not slip during the movement towards the feed port of the sintering furnace box 1, ensuring that the frame 41 can smoothly lift the vertical rod 341, the stability of the material transportation process. And, through the cooperation between the inclined surface 43 and the roller 344, the friction between the vertical rod 341 and the frame 41 can be effectively reduced, enabling the frame 41 to more easily lift the vertical rod 341, thereby improving the stability of the lifting action of the lifting assembly 34.

[0055] As Figure 3 、 Figure 4 and Figure 6 shown, a plurality of first bevel gears 24 are provided on the outer side of the conveying frame 21. The number of the first bevel gears 24 is the same as the number of the conveying rollers 22. Each first bevel gear 24 is respectively connected to each conveying roller 22 through a shaft rod. A rotating shaft 25 is also provided on the outer side of the conveying frame 21. The rotating shaft 25 is arranged along the length direction of the conveying frame 21. A plurality of shaft rod seats 26 are movably sleeved on the outer wall of the rotating shaft 25. The shaft rod seats 26 are fixedly installed on the outer wall of the conveying frame 21. A second bevel gear 27 meshed with the first bevel gear 24 is fixedly sleeved on the outer wall of the rotating shaft 25. A first synchronous pulley 28 is fixedly installed at one end of the rotating shaft 25. The conveying mechanism 2 further includes a motor 29. A second synchronous pulley 210 is fixedly installed at the output shaft end of the motor 29. A synchronous belt 211 is provided between the second synchronous pulley 210 and the first synchronous pulley 28.

[0056] Specifically, the output shaft of the motor 29 drives the second synchronous pulley 210 to rotate. The power is transmitted to the first synchronous pulley 28 through the synchronous belt 211, and then drives the rotating shaft 25 to rotate. The second bevel gear 27 on the rotating shaft 25 meshes with the first bevel gears 24 corresponding to the respective conveying rollers 22, thereby driving the plurality of conveying rollers 22 to rotate synchronously, realizing the conveying function of the conveying mechanism 2 for the material.

[0057] As shown in Figure 7 and Figure 8 FIGs.

[0058] Specifically, the housing assembly 31 is composed of an upper housing 311 and a lower housing 312, which are respectively fixedly installed on the top surface and the bottom surface of the conveying frame 21 and fixedly connected to the sintering furnace box 1 to isolate the internal and external spaces of the sintering furnace box 1. The two door slots 314 on the top of the upper housing 311, one is inside the sintering furnace box 1 and the other is outside, are used to accommodate the door panel 321 in the on-off component 32, providing space for the installation and movement of the furnace door, ensuring that the furnace door can be opened and closed normally, and restricting the entry and exit of heat in the furnace.

[0059] As shown in Figure 4 and Figure 9 FIGs.

[0060] Specifically, the door panel 321 in the on-off component 32 can move in the door slot 314 and extend into the limit frame slot 313. When the telescopic component 33 acts, it drives the upper moving rod 3310 to move in the first straight slot 325, and then makes the door panel 321 rise or fall, so as to realize the opening or closing operation of the furnace door, thereby controlling the on-off between the inside of the furnace and the outside. The structures such as the top plate 322, the side plates 323 and the first fixing plates 324 on the top surface of the door panel 321 provide support and connection functions for the door panel 321.

[0061] As shown in Figure 4 , Figure 6 and Figure 7As shown in the figure, the telescopic component 33 includes a support base 331 fixedly installed on the outer wall of the upper housing 311. On the top surface of the support base 331, second fixing plates 332 are symmetrically installed. A second straight slot 333 is penetrated through the outer wall of the second fixing plate 332. The second straight slot 333 is arranged in parallel with the first straight slot 325. On the top surface of the support base 331, two guide rods 334 are also installed. The guide rods 334 are vertically arranged. On the outer surfaces of the opposite sides of the two second fixing plates 332, telescopic frames 335 are provided. The telescopic frame 335 is composed of multiple intersecting rod bodies. Between the two telescopic frames 335, multiple intermediate rods 337 are provided. The two ends of the intermediate rod 337 respectively pass through the center where the rod bodies intersect movably. Between the two telescopic frames 335, multiple connecting shafts 336 are also provided. The two ends of the connecting shaft 336 respectively pass through the edges where the rod bodies intersect movably. On the outer walls of the two intersecting rod bodies at the lowermost part, lower moving rods 339 are fixedly installed. The lower moving rods 339 are movably arranged inside the second straight slot 333. On the outer walls of the two intersecting rod bodies at the uppermost part, upper moving rods 3310 are fixedly installed. The upper moving rods 3310 are movably arranged inside the first straight slot 325. On the outer wall of the intermediate rod 337 at the lowermost part, a connecting plate 338 is fixedly installed. The connecting plate 338 is slidably connected with the guide rod 334.

[0062] Specifically, when the support plate 346 pushes the connecting plate 338 to rise along the guide rod 334, the connecting plate 338 drives the telescopic frame 335 to expand. The lower moving rod 339 moves inside the second straight slot 333, and the upper moving rod 3310 moves inside the first straight slot 325, realizing the telescopic action, and then driving the door plate 321 of the on-off component 32 to open the furnace door. When the support plate 346 no longer supports the connecting plate 338, the telescopic frame 335 contracts under the action of gravity, closing the furnace door.

[0063] As Figure 11 shown in the figure, a guide sleeve 342 is slidably sleeved on the outer wall of the vertical rod 341. The guide sleeve 342 is fixedly connected with the upper housing 311. A limiting block 343 is fixedly connected to the outer wall of the vertical rod 341 above the guide sleeve 342. The vertical rod 341 in the lifting component 34 inside the housing component 31 slides through the inner top surface of the upper housing 311 and extends upward. The support plate 346 extends toward the connecting plate 338, and the support plate 346 is placed below the connecting plate 338. The support plate 346 is slidably connected with the guide rod 334.

[0064] Specifically, when the tray 4 drives the roller 344 to drive the vertical rod 341 to rise, in cooperation with the U-shaped frame 345, the support plate 346 will slide upward along the guide rod 334, pushing the connecting plate 338 to rise.

[0065] Furthermore, the limiting block 343 ensures the lower limit position of the vertical rod 341, preventing the vertical rod 341 from descending excessively and interfering with the frame 41. When the roller 344 is at the lower limit position, it can smoothly move onto the frame 41 through the inclined plane 43.

[0066] Furthermore, the guide sleeve 342 guides the lifting of the vertical rod 341 to ensure the stability of the lifting of the vertical rod 341.

[0067] As Figure 3 、 Figure 5 and Figure 13 shown, there are three limiting plates 212 in each group. The two limiting plates 212 on both sides are respectively placed outside the upper shell 311, and the middle limiting plate 212 is placed inside the upper shell 311.

[0068] Specifically, the three limiting plates 212 are located at different positions relative to the upper shell 311, and there are gaps between two adjacent limiting plates 212. On the one hand, it is to avoid the lifting movements of the vertical rod 341 and the roller 344. On the other hand, it is to avoid the lifting movement of the door panel 321 to prevent interference.

[0069] As Figure 12 shown, a placement plate 42 is fixedly connected to the inner wall of the frame 41, and the top surface of the frame 41 can contact the bottom surface of the limiting plate 212 extending to the inside of the conveying frame 21.

[0070] Specifically, the placement plate 42 is used to place the powder metallurgy material to be sintered, and there are several through holes on the placement plate 42 to facilitate the flow of hot air, so that the powder metallurgy material can be fully sintered.

[0071] The working principle of this device: First, start the motor 29 to drive the second synchronous wheel 210 to rotate. Through the transmission of the synchronous belt 211, the first synchronous wheel 28 rotates accordingly, and then drives the rotating shaft 25 to rotate. The second bevel gear 27 on the rotating shaft 25 meshes with the first bevel gear 24 to drive multiple conveying rollers 22 to rotate synchronously, realizing the material conveying function of the conveying mechanism 2.

[0072] Place the powder metallurgy material to be sintered on the placement plate 42 of the tray 4, and then place the tray 4 on the conveying rollers 22. As the conveying rollers 22 rotate, the tray 4 moves along the conveying frame 21 towards the feed port of the sintering furnace box 1. When the tray 4 approaches the door mechanism 3 at the feed port and moves to the position of the limiting plate 212, the bottom surface of the limiting plate 212 contacts the top surface of the frame 41, restricting the tray 4 from shaking in the vertical direction. At the same time, with the cooperation of the toothed roller 23 and the card slot 44, the tray 4 will not slip during the movement towards the feed port of the sintering furnace box 1.

[0073] When the inclined surface 43 on the frame 41 comes into contact with the roller 344 in the lifting assembly 34 outside the upper housing 311, as the tray 4 continues to move, it will push the roller 344 and the vertical rod 341 to rise. The rising of the vertical rod 341 drives the U-shaped frame 345 and the support plate 346 to rise. The support plate 346 pushes the connecting plate 338 to slide upward along the guide rod 334. The connecting plate 338 drives the intermediate rod 337 to rise, causing the telescopic frame 335 to unfold, thereby realizing the rising movement of the door panel 321 in the on-off assembly 32 and opening one door panel 321 in the on-off assembly 32. At this time, the tray 4 can smoothly enter the interior of the upper housing 311.

[0074] When the frame 41 comes into contact with the roller 344 in the lifting assembly 34 inside the upper housing 311, similarly to the above steps, the support plate 346 in the lifting assembly 34 will support the connecting plate 338. When the tray 4 leaves the previous lifting assembly 34, the roller 344 in the previous lifting assembly 34 loses support. Under the action of gravity, the lifting assembly 34 descends and resets. When the tray 4 completely enters the interior of the upper housing 311 and continues to move, after moving away from the lifting assembly 34 inside the upper housing 311, the lifting assembly 34 descends and resets under the action of gravity. At this time, the connecting plate 338 here loses support, and the telescopic frame 335 contracts under the action of gravity. At the same time, the door panel 321 in the on-off assembly 32 descends and closes under the action of gravity. At this time, a relatively airtight space is formed between the upper housing 311 and the lower housing 312 through the two door panels 321 in the two on-off assemblies 32.

[0075] As the tray 4 continues to move, the on-off assemblies 32 near the inner side of the sintering furnace box 1 will open and close according to the same process steps, and finally the tray 4 enters the interior of the sintering furnace box 1. Since when the tray 4 is sent into the interior of the sintering furnace box 1, at least one of the two on-off assemblies 32 in the corresponding door mechanism 3 is in the closed state, which avoids the direct connection between the furnace interior and the outside world, thereby reducing heat leakage, reducing energy waste and cost increase, and also avoiding temperature fluctuations in the furnace, ensuring the sintering quality of powder metallurgy products. Similarly, when the tray 4 passes through the door mechanism 3 at the discharge port, at least one on-off assembly 32 is also in the closed state.

[0076] The wiring diagram of the motor 29 in the present invention belongs to the common knowledge in the art. Its working principle is a well-known technology, and its model is selected according to actual use. Therefore, the control method and wiring layout of the motor 29 will not be explained in detail.

[0077] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sintering furnace device suitable for powder metallurgy processing, characterized in that: include: A sintering furnace box (1), used for performing high-temperature sintering treatment on powder metallurgy materials; A conveying mechanism (2) is arranged in cooperation with the sintering furnace box (1) and is used to convey the material to be sintered into the sintering furnace box (1) and to convey the sintered material out of the sintering furnace box (1) after sintering is completed; The conveying mechanism (2) comprises a conveying frame (21), the conveying frame (21) is arranged along the length direction of the sintering furnace box (1), the conveying frame (21) passes through the furnace cavity from the upstream of the sintering furnace box (1) and extends to the downstream, a plurality of conveying rollers (22) are rotatably arranged inside the conveying frame (21), the conveying rollers (22) are arranged along the width direction of the sintering furnace box (1), the top surface of the conveying frame (21) is provided with six limit plates (212) at the feed inlet and the discharge outlet of the sintering furnace box (1), the six limit plates (212) are divided into two groups, three in each group, the limit plates (212) are arranged along the length direction of the sintering furnace box (1), the plurality of limit plates (212) extend toward the inner side of the conveying frame (21), and a plurality of conveying rollers (22) located below the limit plates (212) are fixedly sleeved with toothed rollers (23) on their outer walls; A door mechanism (3), wherein the number of the door mechanisms (3) is set to two, and the two door mechanisms (3) are respectively arranged at the feeding port and the discharging port of the sintering furnace box (1), and the door mechanism (3) comprises a shell component (31), and the shell component (31) is provided with two symmetrical on-off components (32), and the on-off components (32) are provided with two symmetrical telescopic components (33) on both sides along the width direction of the sintering furnace box (1), and the on-off components (32) are provided with two symmetrical lifting components (34) on both sides along the length direction of the sintering furnace box (1), wherein one lifting component (34) is arranged outside the shell component (31), and the other lifting component (34) is arranged inside the shell component (31), and when the lifting component (34) rises, the telescopic component (33) can be extended, and the lifting movement of the on-off component (32) can be achieved through the extension movement of the telescopic component (33); The lifting assembly (34) comprises two vertical rods (341), the vertical rods (341) are placed above the gear roller (23), a roller wheel (344) is rotatably provided at the bottom of the vertical rods (341), a U-shaped frame (345) is installed between the top surfaces of the two vertical rods (341), and a support plate (346) is fixedly installed at the position near the bottom of the outer surface of both sides of the U-shaped frame (345); A tray (4) is placed on a conveying roller (22) and is used to load materials. The tray (4) can be conveyed by a conveying mechanism (2). When the tray (4) is conveyed and contacts the lifting component (34), the lifting component (34) can be lifted. The tray (4) comprises a frame (41), the bottom surface of the frame (41) is provided with a slot (44) cooperating with a toothed roller (23), and the top surface of the frame (41) is provided with inclined surfaces (43) cooperating with a roller (344) at four corners.

2. The sintering furnace device suitable for powder metallurgy processing according to claim 1, characterized in that: A plurality of first bevel gears (24) are arranged on the outside of the conveying frame (21), the number of the first bevel gears (24) is the same as the number of the conveying rollers (22), and each first bevel gear (24) is connected to each conveying roller (22) via an axle rod. A rotating shaft (25) is also arranged on the outside of the conveying frame (21), and the rotating shaft (25) is arranged along the length direction of the conveying frame (21). The outer wall of the rotating shaft (25) is movably sleeved with a plurality of axle rod seats (26), and the axle rod seats (26) are fixedly mounted on the outer wall of the conveying frame (21). A second bevel gear (27) meshingly connected to the first bevel gear (24) is fixedly sleeved on the outer wall of the rotating shaft (25), and a first synchronous wheel (28) is fixedly mounted on one end of the rotating shaft (25).

3. The sintering furnace device suitable for powder metallurgy processing according to claim 2, characterized in that: The conveying mechanism (2) also includes a motor (29), a second synchronous wheel (210) being fixedly mounted on the output shaft end of the motor (29), and a synchronous belt (211) being provided between the second synchronous wheel (210) and the first synchronous wheel (28).

4. The sintering furnace device suitable for powder metallurgy processing according to claim 1, characterized in that: The shell assembly (31) comprises an upper shell (311) fixedly mounted on the top surface of the conveying frame (21) and a lower shell (312) fixedly mounted on the bottom surface of the conveying frame (21); the outer surfaces of the upper shell (311) and the lower shell (312) are both fixedly connected to the sintering furnace box (1); a limiting frame groove (313) is symmetrically fixedly connected inside the lower shell (312); the limiting frame groove (313) passes through the gap between two adjacent conveying rollers (22) and extends into the interior of the upper shell (311), and is fixedly connected to the inner wall of the upper shell (311); two door grooves (314) cooperating with the limiting frame groove (313) are provided on the top of the upper shell (311); one of the door grooves (314) is located inside the sintering furnace box (1), and the other door groove (314) is located outside the sintering furnace box (1).

5. The sintering furnace device suitable for powder metallurgy processing according to claim 4, characterized in that: The on-off assembly (32) comprises a door panel (321) movably arranged inside the door slot (314), and the door panel (321) extends into the limiting frame slot (313); a top panel (322) is installed on the top surface of the door panel (321), and the top panel (322) is arranged along the width direction of the sintering furnace box (1); side panels (323) are fixedly installed on the outer walls on both sides of the top panel (322) along the width direction; two first fixed panels (324) are installed on the bottom surface of the side panel (323), and the first fixed panels (324) are arranged along the width direction of the top panel (322); a first straight slot (325) is opened through the outer wall of the first fixed panel (324), and the first straight slot (325) is arranged along the length direction of the first fixed panel (324).

6. The sintering furnace device suitable for powder metallurgy processing according to claim 5, characterized in that: The telescopic assembly (33) comprises a support seat (331) fixedly mounted on the outer wall of the upper shell (311); a second fixing plate (332) is symmetrically mounted on the top surface of the support seat (331); a second straight slot (333) is penetrated through the outer wall of the second fixing plate (332); the second straight slot (333) is arranged parallel to the first straight slot (325); two guide rods (334) are also mounted on the top surface of the support seat (331); the guide rods (334) are arranged vertically. The outer surfaces of the opposite sides of the two second fixing plates (332) are each provided with a telescopic frame (335), the telescopic frame (335) being composed of a plurality of mutually intersecting rod bodies, a plurality of intermediate rods (337) being provided between the two telescopic frames (335), the two ends of the intermediate rods (337) being respectively movable through the center of the mutually intersecting rod bodies, and a plurality of connecting shafts (336) being respectively movable through the mutually intersecting edges of the rod bodies.

7. The sintering furnace device suitable for powder metallurgy processing according to claim 6, characterized in that: The outer walls of the two rod bodies that cross each other at the bottom are both fixedly mounted with lower moving rods (339), and the lower moving rods (339) are movably arranged inside the second straight slot (333). The outer walls of the two rod bodies that cross each other at the top are both fixedly mounted with upper moving rods (3310), and the upper moving rods (3310) are movably arranged inside the first straight slot (325). The outer wall of the middle rod (337) at the bottom is fixedly mounted with a connecting plate (338), and the connecting plate (338) is slidably connected to the guide rod (334).

8. The sintering furnace device suitable for powder metallurgy processing according to claim 7, characterized in that: The outer wall of the vertical rod (341) is slidably sleeved with a guide sleeve (342), and the guide sleeve (342) is fixedly connected to the upper shell (311). The outer wall of the vertical rod (341) is located above the guide sleeve (342) and is fixedly connected to a limiting block (343). The vertical rod (341) in the lifting assembly (34) inside the shell assembly (31) slides through the top surface of the upper shell (311) and extends upward. The support plate (346) extends toward the connecting plate (338), and the support plate (346) is placed below the connecting plate (338). The support plate (346) is slidably connected to the guide rod (334).

9. The sintering furnace device suitable for powder metallurgy processing according to claim 4, characterized in that: Each group of three limiting plates (212) has two limiting plates (212) on both sides respectively arranged on the outside of the upper shell (311), and a middle limiting plate (212) arranged on the inside of the upper shell (311).

10. The sintering furnace device suitable for powder metallurgy processing according to claim 1, characterized in that: A placement plate (42) is fixedly connected to the inner wall of the frame (41), and the top surface of the frame (41) can contact the bottom surface of the limit plate (212) extending to the inner side of the conveying frame (21).

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