Metal powder sintering device

Abstract

The utility model relates to the field of sintering, in particular to a metal powder sintering device. According to the metal powder sintering device, the pressure borne by the metal powder is gradually increased while the sintering temperature of the metal powder is gradually increased, so that the sintering forming strength of the metal powder is higher. A metal powder sintering device comprises a shell. An outer cover is connected to one side of the outer shell in a buckled mode, an inner shell is installed in the outer shell, a heating pipe is connected to the lower portion of the outer shell, and the heating end of the heating pipe penetrates through the bottom of the inner shell. The downward pressing stroke of the downward pressing frame every time is gradually increased, so that the temperature of the metal powder in the storage box is gradually increased, meanwhile, the downward pressing distance of the downward pressing frame every time is gradually increased, and the downward pressing distance and pressure of the downward pressing frame are larger while the temperature borne by the metal powder is gradually increased; and gaps between metal substances formed through pressing are smaller, so that the sintering forming strength of the metal powder is higher, and the metal sintering forming quality is improved.

Description

Technical Field

[0001] The utility model relates to the field of sintering, in particular to a metal powder sintering device. Background Art

[0002] Metal powder or powder compact is heated to a temperature below the melting point of the main component, and through physical and chemical actions such as bonding between particles, materials or products with the required strength and characteristics are obtained.

[0003] After filling metal powder into a mold, compression molding is required. During the sintering process, it is necessary to compress the metal powder vertically through pressure to increase density and strength. Currently, generally, the metal powder is first heated to a specified temperature, and finally pressure is applied to the metal powder for compacting and forming. In this way, after heating the metal powder is completed and finally pressure is applied to the metal powder once, there will be relatively large gaps between the compacted and formed metal substances, resulting in insufficient strength of the sintered metal powder. Summary of the Utility Model

[0004] In order to overcome the defect that after the metal powder of the current sintering device is heated and finally pressure is applied to the metal powder once, there will be relatively large gaps between the compacted and formed metal substances, resulting in insufficient strength of the sintered metal powder, the utility model provides a metal powder sintering device which can be under gradually increasing pressure while the sintering temperature of the metal powder is gradually increasing, so that the strength of the sintered metal powder is higher.

[0005] Technical Solution: A metal powder sintering device includes a housing, an outer cover is buckled on one side of the housing, an inner housing is installed inside the housing, a heating pipe is connected to the lower part of the housing, and the heating end of the heating pipe passes through the bottom of the inner housing.

[0006] As a preferred technical solution of the utility model, a servo motor is further included. The servo motor is installed on the outer side of the housing. The output shaft of the servo motor sequentially passes through the centers of the housing and the inner housing. A connecting frame is installed at the other end of the output shaft of the servo motor. Rotating shafts are rotatably installed at both ends of the connecting frame. A storage box is fixedly connected to one end of the rotating shaft. A box cover is slidably installed on the storage box. A sliding hole is opened on the box cover, and a downward pressing frame is slidably installed in the sliding hole on the box cover.

[0007] As a preferred technical solution of the utility model, an inclined pressing block is further included. The inclined pressing block is slidably installed on the upper part of the inner housing. A threaded rod is rotatably installed on one side of the inner housing. A nut is fixedly connected to the inclined pressing block. The nut is threadedly connected to the threaded rod. A column gear is fixedly connected to one end of the threaded rod. A rack is fixedly connected to the output shaft of the servo motor, and the rack meshes with the column gear.

[0008] As a preferred technical solution of the present utility model, it further includes a hexagonal rod, the other end of the rotating shaft is installed with the hexagonal rod, and two arc-shaped limiting plates for limiting the hexagonal rod are fixedly connected to the inner side surface of the inner shell.

[0009] As a preferred technical solution of the present utility model, chamfers with inclined surfaces are provided at both ends of the arc-shaped limiting plate.

[0010] The present utility model has the following advantages: 1. When the output shaft of the servo motor rotates, it will drive the rack to rotate. After the rack meshes with the column gear, the column gear will rotate counterclockwise. The counterclockwise rotation of the column gear will drive the threaded rod to rotate counterclockwise. The counterclockwise rotation of the threaded rod will drive the nut and the inclined pressure block to move towards the storage box. As the inclined pressure block gets closer and closer to the storage box, the downward pressing stroke of the pressing frame increases gradually each time. In this way, the temperature of the metal powder in the storage box is gradually increased. At the same time, the downward pressing distance of the pressing frame increases gradually each time. It can make the distance and pressure of the downward pressing of the pressing frame larger while the temperature of the metal powder is gradually increased, so that the gap between the metal substances formed by compaction is smaller, thereby making the strength of the sintered metal powder higher, and further improving the quality of metal sintering forming.

[0011] 2. The arc-shaped limiting plate clamps the hexagonal rod, thereby limiting the storage box, the box cover and the pressing frame. When the pressing frame presses downwards, the storage box will not swing, which can improve the stability of the storage box when the pressing frame presses downwards, and thus can further improve the quality of metal powder sintering. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a three-dimensional structural schematic diagram of the present utility model.

[0013] Figure 2 is a cross-sectional structural schematic diagram of the present utility model.

[0014] Figure 3 is a three-dimensional structural schematic diagram of the inner shell, the column gear and the rack of the present utility model.

[0015] Figure 4 is a first cross-sectional structural schematic diagram of the inner shell of the present utility model.

[0016] Figure 5 is a second cross-sectional structural schematic diagram of the inner shell of the present utility model.

[0017] Figure 6 is an exploded schematic diagram of the rotating shaft, the storage box, the box cover and the pressing frame of the present utility model.

[0018] The labels in the figure are: 1 - outer shell, 2 - outer cover, 3 - inner shell, 31 - heating tube, 4 - servo motor, 5 - connecting frame, 6 - rotating shaft, 7 - material storage box, 8 - box cover, 9 - pressing frame, 10 - inclined pressing block, 11 - threaded rod, 12 - nut, 13 - cylindrical gear, 14 - rack, 15 - hexagonal rod, 16 - arc-shaped limiting plate. Detailed implementation manner

[0019] The following further describes the present utility model in detail in conjunction with the accompanying drawings and specific implementation manners, but does not limit the protection scope and application scope of the present utility model.

[0020] Embodiment 1: A metal powder sintering device, as Figures 1-6 shown, includes an outer shell 1, an outer cover 2 is buckled on one side of the outer shell 1, an inner shell 3 is installed inside the outer shell 1, a heating tube 31 is connected to the lower part of the outer shell 1, and the heating end of the heating tube 31 passes through the bottom of the inner shell 3, and the heating tube 31 is used for heating the metal powder.

[0021] It also includes a servo motor 4, the servo motor 4 is installed outside the outer shell 1, the output shaft of the servo motor 4 sequentially passes through the centers of the outer shell 1 and the inner shell 3, and the other end of the output shaft of the servo motor 4 is installed with a connecting frame 5 in a key connection manner. Both ends of the connecting frame 5 are installed with rotating shafts 6 through bearings, one end of the rotating shaft 6 is fixedly connected with a material storage box 7, a box cover 8 is slidably installed on the material storage box 7, a sliding hole is opened on the box cover 8, and a pressing frame 9 is slidably installed in the sliding hole on the box cover 8.

[0022] It also includes an inclined pressing block 10, the inclined pressing block 10 is slidably installed on the upper part of the inner shell 3, a threaded rod 11 is rotatably installed on one side of the inner shell 3, a nut 12 is fixedly connected to the inclined pressing block 10, the nut 12 is threadedly connected with the threaded rod 11, one end of the threaded rod 11 is installed with a cylindrical gear 13 through a coupling, and a rack 14 is fixedly connected to the output shaft of the servo motor 4, and the rack 14 meshes with the cylindrical gear 13.

[0023] The operator first opens the outer cover 2, then moves the box cover 8 and the pressing frame 9 upward. Then, an appropriate amount of metal powder is added into the material storage box 7. After that, the operator moves the box cover 8 and the pressing frame 9 downward. After the box cover 8 closes the material storage box 7, the operator closes the outer cover 2. Then, the operator fills the outer shell 1 with a protective gas to prevent the formed product from oxidizing. Then, the operator starts the servo motor 4 to rotate clockwise, and at the same time, the operator starts the heating tube 31 to work. The servo motor 4 drives the connecting frame 5, the rotating shaft 6, the material storage box 7, the box cover 8, and the pressing frame 9 to rotate. The heating tube 31 can intermittently heat the metal powder in the material storage box 7. When the material storage box 7, the box cover 8, and the pressing frame 9 rotate below the inclined pressing block 10, the pressing frame 9 will contact the inclined pressing block 10, and the pressing frame 9 will move downward to compact the metal powder in the material storage box 7. When the output shaft of the servo motor 4 rotates, it drives the rack 14 to rotate. After the rack 14 meshes with the column gear 13, the column gear 13 will rotate counterclockwise. The counterclockwise rotation of the column gear 13 drives the threaded rod 11 to rotate counterclockwise. The counterclockwise rotation of the threaded rod 11 drives the nut 12 and the inclined pressing block 10 to move towards the material storage box 7. As the inclined pressing block 10 continuously approaches the material storage box 7, the downward pressing stroke of the pressing frame 9 gradually increases each time. In this way, the temperature of the metal powder in the material storage box 7 gradually rises. At the same time, the downward pressing distance of the pressing frame 9 gradually increases each time. It can make the distance and pressure of the downward pressing of the pressing frame 9 greater while the temperature received by the metal powder gradually increases, making the gaps between the pressed and formed metal substances smaller, thereby making the strength of the sintered metal powder higher, and further improving the quality of metal sintering forming. After sintering is completed, the operator turns off the heating tube 31, turns off the servo motor 4, opens the box cover 8 after opening the outer cover 2, the operator takes out the sintered substance, and then the operator starts the servo motor 4 to rotate reversely. When the output shaft of the servo motor 4 rotates, it drives the rack 14 to rotate. After the rack 14 meshes with the column gear 13, the column gear 13 will rotate clockwise. The clockwise rotation of the column gear 13 drives the threaded rod 11 to rotate clockwise. The clockwise rotation of the threaded rod 11 drives the nut 12 and the inclined pressing block 10 to move away from the material storage box 7. After the inclined pressing block 10 is reset, the operator turns off the servo motor 4.

[0024] Embodiment 2: On the basis of Embodiment 1, as Figures 4-6 shown, it further includes a hexagonal rod 15. The other end of the rotating shaft 6 is provided with the hexagonal rod 15, and two arc-shaped limiting plates 16 for limiting the hexagonal rod 15 are fixedly connected to the inner side surface of the inner shell 3.

[0025] Both ends of the arc-shaped limiting plate 16 are provided with chamfers with inclined surfaces.

[0026] Since the storage box 7 is rotatably connected to the connecting frame 5, the storage box 7 can always be vertically downward and will not flip. When the storage box 7, the box cover 8 and the pressing frame 9 move below the inclined pressing block 10, the rotating shaft 6 drives the hexagonal rod 15 to move between the two arc-shaped limiting plates 16, and the hexagonal rod 15 is clamped by the arc-shaped limiting plates 16, so as to limit the storage box 7, the box cover 8 and the pressing frame 9. When the pressing frame 9 presses down, the storage box 7 will not swing, which can improve the stability of the storage box 7 when the pressing frame 9 presses down, and thus can further improve the quality of metal powder sintering.

[0027] Since chamfers with inclined surfaces are provided at both ends of the arc-shaped limiting plate 16, when the hexagonal rod 15 contacts the inclined surfaces at both ends of the arc-shaped limiting plate 16, the hexagonal rod 15 can enter between the two arc-shaped limiting plates 16 more smoothly.

[0028] The above embodiments are provided for those skilled in the art to implement or use the present invention. Those skilled in the art can make various modifications or changes to the above embodiments without departing from the inventive concept of the present invention. Therefore, the protection scope of the present invention is not limited by the above embodiments, but should be the maximum scope that conforms to the innovative features mentioned in the claims.

Claims

1. A metal powder sintering device, characterized in that: The utility model comprises an outer shell, one side of which is buckled with an outer cover, an inner shell is installed in the outer shell, a heating tube is connected to the lower part of the outer shell, and the heating end of the heating tube passes through the bottom of the inner shell.

2. A metal powder sintering device according to claim 1, characterized in that: It also includes a servo motor, which is installed on the outside of the outer shell, and the output shaft of the servo motor passes through the center of the outer shell and the inner shell in sequence. A connecting frame is installed on the other end of the output shaft of the servo motor, and rotating shafts are rotatably installed at both ends of the connecting frame. A storage box is fixedly connected to one end of the rotating shaft, and a box cover is slidably installed on the storage box, a sliding hole is opened on the box cover, and a lower pressure frame is slidably installed in the sliding hole on the box cover.

3. A metal powder sintering device according to claim 2, characterized in that: It also includes an inclined pressure block, which is slidably installed on the upper part of the inner shell, and a threaded rod is rotatably installed on one side of the inner shell. A nut is fixedly connected to the inclined pressure block, and the nut is connected to the threaded rod through threads. A column gear is fixedly connected to one end of the threaded rod, and a rack is fixedly connected to the output shaft of the servo motor, and the rack will mesh with the column gear.

4. A metal powder sintering device according to claim 3, characterized in that: It also includes a hexagonal rod, the other end of the rotating shaft is equipped with the hexagonal rod, and the inner side surface of the inner shell is fixedly connected with two arc-shaped limiting plates for limiting the hexagonal rod.

5. A metal powder sintering device according to claim 4, characterized in that: Both ends of the arc-shaped limiting plate are provided with chamfers of inclined surfaces.

Images