Sintering furnace for metal powder machining and workpiece cooling equipment

Abstract

The invention discloses a sintering furnace for metal powder machining and workpiece cooling equipment, and relates to the field of sintering furnaces, the sintering furnace comprises a sintering box, cover doors and the sintering furnaces are installed in the sintering box, the two sets of sintering furnaces are symmetrically arranged, and the outer side of each set of sintering furnace is rotationally connected with a set of cover doors; a limiting sealing structure is installed on the inner wall of the cover door, a cavity is formed in the sintering furnace, multiple sets of electromagnetic heating cylinders are installed in the sintering furnace, an electromagnetic coil is installed in each set of electromagnetic heating cylinder, and an air exchange mechanism is installed on the side face of the sintering box. Through the arrangement of the multiple sets of single electromagnetic heating cylinders, the objective table and the supporting frame, different workpieces can be machined through the single electromagnetic heating cylinders in the heating process, fine adjustment can be conducted according to machining requirements, and therefore different workpieces can be synchronously and differently machined, machining is independent of one another, and the machining efficiency is improved. And interference is reduced.

Description

Technical Field

[0001] The present invention relates to the field of sintering furnaces, and specifically to a sintering furnace for metal powder processing and a workpiece cooling device. Background Art

[0002] Metal powder sintering is a technique commonly used in manufacturing metal parts, usually applied in the field of powder metallurgy. Its basic process is to heat metal powder at a high temperature close to or reaching its melting point, but maintaining a temperature below its complete melting. At this temperature, the metal powder particles bond together to form a solid and strong part. During the sintering process, the powder needs to be shaped by a mold. After shaping, the part is still relatively fragile. Therefore, the part is placed inside a sintering furnace and then heated by the sintering furnace. After heating, a cooling device is required to cool the heated part to facilitate the removal of the part.

[0003] The prior art, such as a powder metallurgy sintering furnace disclosed in Chinese Patent Publication No. CN116000295A, includes: A sintering furnace component, including a sintering furnace body with a hollow interior. A plurality of placement plates for placing workpieces are provided inside the sintering furnace body, and heating elements are installed on both sides of the inner wall of the sintering furnace body. The heating elements are used to heat and sinter the workpieces placed on the placement plates; A height adjustment component, including a plurality of adjustment components and locking components; the plurality of adjustment components are respectively arranged at both ends of the plurality of placement plates. After the heights of the plurality of placement plates are adjusted by the plurality of adjustment components respectively, the plurality of adjustment components can be limited and fixed by the plurality of locking components respectively.

[0004] However, in the prior art, during heating and cooling, the same chamber is used. During the cooling process, the next set of materials cannot be immediately heated. And during the cooling process, the hot air in the chamber is pumped out and directly discharged, which will cause waste of heat. Moreover, in the existing sintering furnace, during the sintering process, the pre-sintering mode also requires the heating structure to operate for heating, which consumes energy. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a sintering furnace for metal powder processing and a workpiece cooling device to solve the technical problems of low processing efficiency and heat waste.

[0006] To achieve the above object, the present invention provides the following technical solutions: A sintering furnace and a workpiece cooling device for metal powder processing, including a sintering box, inside which a cover door and a sintering furnace are installed. There are two groups of sintering furnaces symmetrically arranged, and a group of cover doors are rotatably connected to the outside of each group of sintering furnaces. A limit sealing structure is installed on the inner wall of the cover door. A cavity is opened inside the sintering furnace, and a plurality of electromagnetic heating cylinders are installed inside the sintering furnace, and electromagnetic coils are installed inside each electromagnetic heating cylinder. A ventilation mechanism is installed on the side of the sintering box, and the ventilation mechanism is connected to the sintering furnace through a pipeline. A driving mechanism is connected to the outside of the sintering furnace, and the output end of the driving mechanism is connected to a conveyor belt for driving the airflow in the pipeline to flow inside the sintering furnace. A loading platform and a support frame are installed on the inner wall of the electromagnetic heating cylinder, and a workpiece is installed on the top of the loading platform. The loading platform is slidably connected to the support frame.

[0007] By adopting the above technical solutions, it is possible to conveniently drive the airflow to flow inside the sintering furnace, thereby absorbing and filtering the impurities generated during the sintering of the workpiece, and reducing the heat dissipation of the equipment.

[0008] The present invention is further provided that a display screen and an operation panel are installed on the side of the sintering box, and the sintering box is provided with a housing for protecting the sintering furnace.

[0009] Preferably, it is convenient to operate the equipment to sinter the workpiece.

[0010] The present invention is further provided that an electromagnetic push rod is installed on the outer wall of the cover door, the top of the electromagnetic push rod is connected to a power connection rod, a sealing cover plate is installed on the inner wall of the cover door, the back of the sealing cover plate is fixedly connected to the power connection rod, and a plurality of sealing plugs are opened on the outside of the sealing cover plate.

[0011] Preferably, it is convenient to push the sealing cover plate. During the closing process of the cover door, the sealing performance is further improved by the engagement of the sealing cover plate and the sealing plugs.

[0012] The present invention is further provided that a cavity is opened inside the sintering furnace, and a sleeve for supporting the electromagnetic heating cylinder is opened inside the cavity. A one-way valve is installed on the outside of the sintering furnace, and the valve opens when the pressure inside the sintering furnace is too high.

[0013] Preferably, it is possible to conveniently perform negative pressure extraction on the sintering furnace and reduce the heat exchange between the sintering furnace and the outside air.

[0014] The present invention is further provided that a driving motor is installed inside the driving mechanism, the output end of the driving mechanism is connected to a heat dissipation transmission piece, and the driving mechanism is connected to the input shaft of the conveyor belt through the heat dissipation transmission piece.

[0015] Preferably, it can conveniently drive the conveyor belt to rotate and reduce heat transfer to the driving motor.

[0016] The present invention is further configured such that a fixed hook is connected to the top end of the driving mechanism, and the driving mechanism is fixedly connected to the sintering box through the fixed hook.

[0017] Preferably, it is convenient to fixedly install the driving mechanism.

[0018] The present invention is further configured such that a filter block is installed inside the ventilation mechanism, and the filter block is aligned with the suction pipe. Partition plates are connected above and below each group of filter blocks inside the ventilation mechanism, and the partition plates are used to seal the gas flow between the suction pipe and the air supply pipe.

[0019] Preferably, it can filter other substances inhaled and seal the air in this section to reduce pollution.

[0020] The present invention is further configured such that an impurity absorption pipe is connected to the side of the suction pipe, the impurity absorption pipe extends to the inside of the electromagnetic heating cylinder above the loading platform, and an air suction slot is opened below the impurity absorption pipe. A return air pipe is also connected to the side of the air supply pipe, the return air pipe extends to the inside of the sintering box below the loading platform, and air jet slots are opened on both sides of the return air pipe.

[0021] Preferably, it can extract the air flow from the electromagnetic heating cylinder and send it back to the inside of the electromagnetic heating cylinder through the air supply pipe, and the returned air flow is located directly below the workpiece, which can clean the workpiece.

[0022] The present invention is further configured such that the inside of the conveyor belt includes a transmission shaft and transmission teeth. The transmission shaft is in transmission connection with the output end of the driving motor. A fan blade is connected to the side of the transmission teeth, and the fan blade is located inside the ventilation mechanism and is used to drive the air flow.

[0023] Preferably, it can conveniently drive multiple fan blades to rotate for filtration.

[0024] The present invention is further configured such that a negative pressure pipe and a one-way valve are also connected to the back of the sintering furnace, and a negative pressure mechanism is installed outside the sintering furnace. The negative pressure mechanism is connected to the negative pressure pipe.

[0025] Preferably, it is convenient to evacuate the inside of the sintering furnace to a vacuum.

[0026] In summary, the present invention mainly has the following beneficial effects: 1. The present invention, through a plurality of sets of individual electromagnetic heating cylinders, a loading platform and a support frame, can process different workpieces through individual electromagnetic heating cylinders during the heating process, and can be finely adjusted according to processing requirements, so as to be able to process different workpieces synchronously and independently of each other during processing, reducing interference.

[0027] 2. The present invention also, through the provided electromagnetic heating cylinder, ventilation mechanism, suction pipe and air supply pipe, during the sintering process, when the workpiece generates fumes, the driving mechanism outside the ventilation mechanism is first started, the driving mechanism drives the conveyor belt to rotate, the conveyor belt drives the fan blades to rotate, and the fan blades drive the air flow to circulate inside the suction pipe, ventilation mechanism, air supply pipe and sintering furnace, sucking the polluted gas through the suction pipe and finally sending it into the ventilation mechanism, filtering the air flow through the filter block, and sending the filtered air flow back into the sintering furnace through the exhaust pipe, so as to be able to recover the generated fumes and reduce pollution.

[0028] 3. Finally, the present invention, through the provided cover door, before sintering, the sealing cover plate is pushed by the electromagnetic push rod to fit on the outside of the sintering furnace, and a plurality of sets of sealing plugs are inserted into the electromagnetic heating cylinder, thereby sealing and isolating the electromagnetic heating cylinder and improving the heating effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic structural diagram of the sintering furnace of the present invention; Figure 3 is a schematic structural diagram of the open cover door of the sintering furnace of the present invention; Figure 4 is a schematic structural diagram of the back of the sintering furnace of the present invention; Figure 5 is a schematic sectional structural diagram of the sintering furnace of the present invention; Figure 6 is a schematic structural diagram of the inside of the sintering furnace of the present invention; Figure 7 is a schematic structural diagram of the electromagnetic heating cylinder of the present invention; Figure 8 is a schematic structural diagram of the loading mechanism of the present invention; Figure 9 is a schematic structural diagram of the driving mechanism of the present invention; Figure 10 is a schematic structural diagram of the ventilation mechanism of the present invention; Figure 11 of the present invention Figure 10 is a schematic enlarged partial structural diagram at position A in; Figure 12 is a schematic structural diagram of the inside of the cover door of the present invention.

[0030] Description of reference numerals: 1. Sintering box; 101. Display screen; 102. Operation panel; 2. Cover door; 201. Electromagnetic push rod; 202. Power connection rod; 203. Sealing cover plate; 204. Sealing plug; 3. Sintering furnace; 301. Cavity; 4. Driving mechanism; 401. Fixed hook; 402. Driving motor; 403. Heat dissipation transmission piece; 5. Electromagnetic heating cylinder; 501. Electromagnetic coil; 6. Ventilation mechanism; 601. Filter block; 602. Partition board; 7. Suction pipe; 701. Impurity absorption pipe; 8. Air supply pipe; 801. Return air pipe; 9. Negative pressure pipe; 10. Support frame; 11. Carrying platform; 12. Support frame; 1201. Track; 13. Conveyor belt; 1301. Drive shaft; 1302. Transmission gear; 1303. Fan blade; 14. Negative pressure mechanism. Specific embodiments

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention, and should not be construed as a limitation to the present invention.

[0032] The embodiments of the present invention will be described below according to its overall structure.

[0033] The first embodiment: Please refer to Figures 1 to 4 , a sintering furnace and a workpiece cooling device for metal powder processing, including a sintering box 1, a display screen 101 and an operation panel 102 are installed on the side of the sintering box 1, the sintering box 1 is provided with a housing for protecting the sintering furnace 3, a cover door 2 and a sintering furnace 3 are installed inside the sintering box 1, two groups of sintering furnaces 3 are symmetrically arranged, a group of cover doors 2 are rotatably connected to the outside of each group of sintering furnaces 3, a limit sealing structure is installed on the inner wall of the cover door 2, a cavity 301 is opened inside the sintering furnace 3, a negative pressure pipe 9 and a one-way valve are also connected to the back of the sintering furnace 3, a negative pressure mechanism 14 is installed outside the sintering furnace 3, the negative pressure mechanism 14 is connected to the negative pressure pipe 9, a cavity 301 is opened inside the sintering furnace 3, and a sleeve for supporting the electromagnetic heating cylinder 5 is opened inside the cavity 301, a one-way valve is installed outside the sintering furnace 3, and when the pressure inside the sintering furnace 3 is too high, the valve opens.

[0034] Please refer to Figures 4 to 8, multiple groups of electromagnetic heating cylinders 5 are installed inside the sintering furnace 3, and electromagnetic coils 501 are installed inside each group of electromagnetic heating cylinders 5. A ventilation mechanism 6 is installed on the side of the sintering box 1. A filter block 601 is installed inside the ventilation mechanism 6, and the filter block 601 is aligned with the suction pipe 7. Partition plates 602 are connected above and below the top of each group of filter blocks 601 inside the ventilation mechanism 6. The partition plates 602 are used to seal the gas flow between the suction pipe 7 and the air supply pipe 8. The ventilation mechanism 6 is connected to the sintering furnace 3 through a pipeline. An impurity absorption pipe 701 is connected to the side of the suction pipe 7. The impurity absorption pipe 701 extends to the inside of the electromagnetic heating cylinder 5 above the carrier table 11, and suction slots are opened below the impurity absorption pipe 701. A return air pipe 801 is also connected to the side of the air supply pipe 8. The return air pipe 801 extends to the inside of the sintering box 1 below the carrier table 11, and jet slots are opened on both sides of the return air pipe 801, facilitating the flow of air in the sintering furnace 3, the pipeline, and the ventilation mechanism 6 and facilitating the filtration of the air flow.

[0035] Please refer to Figures 9 to 11 , a driving mechanism 4 is connected to the outside of the sintering furnace 3. A driving motor 402 is installed inside the driving mechanism 4. The output end of the driving mechanism 4 is connected to a heat dissipation transmission piece 403, and the driving mechanism 4 is connected to the input shaft of the conveyor belt 13 through the heat dissipation transmission piece 403. The inside of the conveyor belt 13 includes a transmission shaft 1301 and transmission teeth 1302. The transmission shaft 1301 is in transmission connection with the output end of the driving motor 402. A fan blade 1303 is connected to the side of the transmission teeth 1302. The fan blade 1303 is located inside the ventilation mechanism 6 and is used to drive the air flow.

[0036] In the above embodiment, specifically, please refer to Figure 7 , a carrier table 11 and a support frame 12 are installed on the inner wall of the electromagnetic heating cylinder 5. The top of the carrier table 11 is a hollow mesh. A workpiece is installed on the top of the carrier table 11. The carrier table 11 is slidably connected to the support frame 12.

[0037] In the above embodiment, specifically, please refer to Figure 12 , an electromagnetic push rod 201 is installed on the outer wall of the cover door 2. A power connection rod 202 is connected to the top of the electromagnetic push rod 201. A sealing cover plate 203 is installed on the inner wall of the cover door 2. The back of the sealing cover plate 203 is fixedly connected to the power connection rod 202. Multiple groups of sealing plugs 204 are opened on the outside of the sealing cover plate 203.

[0038] In the above embodiment, specifically, please refer to Figure 9 , a fixed hook 401 is connected to the top of the driving mechanism 4. The driving mechanism 4 is fixedly connected to the sintering box 1 through the fixed hook 401.

[0039] During the sintering process, first place the workpiece to be sintered on the carrier table 11, start the negative pressure mechanism 14 in the sintering box 1, evacuate the cavity 301 in the sintering furnace 3 to negative pressure, then insert each group of carrier tables 11 into the electromagnetic heating cylinder 5 in sequence, limit the carrier table 11 through the support frame 12. After multiple groups of electromagnetic heating cylinders 5 are filled with workpieces, push the cover door 2 against the outer side of the sintering furnace 3 through the handle. At this time, the power connection rod 202 is connected to the power supply, start the electromagnetic push rod 201, the electromagnetic push rod 201 pushes the sealing cover plate 203 to move, the sealing cover plate 203 approaches the outer sides of each group of electromagnetic heating cylinders 5, insert each group of sealing plugs 204 into the electromagnetic heating cylinder 5 to seal the inside of the electromagnetic heating cylinder 5, and complete the installation of the workpiece; During sintering, connect the power supply of the electromagnetic coil 501, and heat each group of workpieces through electromagnetic induction to start sintering. During the metal sintering process, some harmful gases will be generated. Then start the drive mechanism 4, the output end of the drive motor 402 drives the heat dissipation drive piece 403 to rotate, the heat dissipation drive piece 403 drives the transmission shaft 1301 to rotate, thereby driving the conveyor belt 13 to rotate, the conveyor belt 13 drives the transmission gear 1302 to rotate, and the transmission gear 1302 drives the fan blade 1303 to rotate in the ventilation mechanism 6, sucking the harmful gases in each group of electromagnetic heating cylinders 5 into the suction pipe 7 through the impurity absorption pipe 701. The polluted gas will be filtered through the filter block 601, and the filtered gas will return to the sintering furnace 3 through the air supply pipe 8. And the return air pipe 801 is located below the workpiece, and the generated air flow flows upward along the outer side of the workpiece, so as to drive the air flow and impurities to move upward, further cleaning the outer side of the workpiece, improving the cleaning effect and reducing pollution; After sintering is completed, turn off each group of electromagnetic heating cylinders 5 at this time, and start the negative pressure mechanism 14 to inject external air into the cavity 301 of the sintering furnace 3, so as to quickly cool the inside of the sintering furnace. When the temperature drops to a certain level, inject air into the inside of the sintering furnace 3 again, and the excess air is discharged through the one-way valve, so as to efficiently and quickly cool the workpiece. At the same time, start the drive mechanism 4 to drive the air flow to flow in the sintering furnace, improving the cooling effect. Then reverse-start the electromagnetic push rod 201 to drive the sealing cover plate 203 to return to its original position, pull out the sealing plug 204 from the electromagnetic heating cylinder 5, open the sintering furnace 3, and take out the sintered workpiece.

[0040] Although embodiments of the present invention have been shown and described, the specific embodiments are merely explanations of the present invention and not limitations thereof. The specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations that do not make a creative contribution to the embodiments as needed, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A sintering furnace and a workpiece cooling device for metal powder processing, including a sintering box (1), characterized in that: Inside the sintering box (1), a cover door (2) and a sintering furnace (3) are installed. There are two groups of sintering furnaces (3) symmetrically arranged. A group of cover doors (2) are rotatably connected to the outside of each group of sintering furnaces (3). A limiting and sealing structure is installed on the inner wall of the cover door (2). A cavity (301) is opened inside the sintering furnace (3). A plurality of electromagnetic heating cylinders (5) are installed inside the sintering furnace (3), and electromagnetic coils (501) are installed inside each electromagnetic heating cylinder (5). A ventilation mechanism (6) is installed on the side of the sintering box (1). The ventilation mechanism (6) is connected to the sintering furnace (3) through a pipeline. A driving mechanism (4) is connected to the outside of the sintering furnace (3). The output end of the driving mechanism (4) is connected to a conveyor belt (13) for driving the airflow in the pipeline to flow inside the sintering furnace (3). A carrier table (11) and a support frame (12) are installed on the inner wall of the electromagnetic heating cylinder (5). A workpiece is installed on the top of the carrier table (11). The carrier table (11) is slidably connected to the support frame (12).

2. The sintering furnace and workpiece cooling equipment for metal powder processing according to claim 1, characterized in that: A display screen (101) and an operation panel (102) are installed on the side of the sintering box (1). The sintering box (1) is provided with a housing for protecting the sintering furnace (3).

3. A sintering furnace and a workpiece cooling device for metal powder processing according to claim 1, characterized in that: An electromagnetic push rod (201) is installed on the outer wall of the cover door (2). The top of the electromagnetic push rod (201) is connected to an electricity connection rod (202). A sealing cover plate (203) is installed on the inner wall of the cover door (2). The back of the sealing cover plate (203) is fixedly connected to the electricity connection rod (202). A plurality of sealing plugs (204) are opened on the outside of the sealing cover plate (203).

4. A sintering furnace and a workpiece cooling device for metal powder processing according to claim 1, characterized in that: A cavity (301) is opened inside the sintering furnace (3), and a sleeve for supporting the electromagnetic heating cylinder (5) is opened inside the cavity (301). A one-way valve is installed on the outside of the sintering furnace (3). When the internal pressure of the sintering furnace (3) is too high, the valve opens.

5. A sintering furnace and a workpiece cooling device for metal powder processing according to claim 1, characterized in that: A driving motor (402) is installed inside the driving mechanism (4). The output end of the driving mechanism (4) is connected to a heat dissipation transmission piece (403). The driving mechanism (4) is connected to the input shaft of the conveyor belt (13) through the heat dissipation transmission piece (403).

6. A sintering furnace and a workpiece cooling device for metal powder processing according to claim 1, characterized in that: A fixed hook (401) is connected to the top of the driving mechanism (4). The driving mechanism (4) is fixedly connected to the sintering box (1) through the fixed hook (401).

7. A sintering furnace and a workpiece cooling device for metal powder processing according to claim 1, characterized in that: A filter block (601) is installed inside the ventilation mechanism (6), and the filter block (601) is aligned with the suction pipe (7). Partition plates (602) are connected to the top and bottom of each group of filter blocks (601) inside the ventilation mechanism (6). The partition plates (602) are used to seal the gas flow between the suction pipe (7) and the air supply pipe (8).

8. A sintering furnace and a workpiece cooling device for metal powder processing according to claim 7, characterized in that: A impurity absorption pipe (701) is connected to the side of the suction pipe (7). The impurity absorption pipe (701) extends to the inside of the electromagnetic heating cylinder (5) above the carrier table (11), and an air suction slot is formed below the impurity absorption pipe (701). A return air pipe (801) is also connected to the side of the air supply pipe (8). The return air pipe (801) extends to the inside of the sintering box (1) below the carrier table (11), and air jet slots are formed on both sides of the return air pipe (801).

9. A sintering furnace and a workpiece cooling device for metal powder processing according to claim 1, characterized in that: The inside of the conveyor belt (13) includes a transmission shaft (1301) and transmission teeth (1302). The transmission shaft (1301) is in transmission connection with the output end of the drive motor (402). A fan blade (1303) is connected to the side of the transmission teeth (1302). The fan blade (1303) is located inside the ventilation mechanism (6) and is used to drive the air flow.

10. A sintering furnace and a workpiece cooling device for metal powder processing according to claim 1, characterized in that: A negative pressure pipe (9) and a check valve are further connected to the back of the sintering furnace (3). A negative pressure mechanism (14) is installed on the outside of the sintering furnace (3), and the negative pressure mechanism (14) is connected to the negative pressure pipe (9).

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