A support structure for sintering tungsten bars in a medium frequency furnace

Abstract

The present invention discloses a support structure for sintering tungsten bars in a medium frequency furnace, belonging to the technical field of sintering. In this solution, a pair of sintering carrying barrels are connected to each other, and the tungsten bar is inserted into a linkage chassis inside the sintering carrying barrel on one side. During the high-temperature sintering process, the rotating shaft is rotated to enable the separating circulation belt to drive the tungsten bar to move back and forth inside the two sintering carrying barrels, so that the tungsten bars on the inner and outer sides continuously exchange positions in a cycle, effectively avoiding the situation where the temperature of the tungsten bar at the center is higher, improving the uniformity of heating the tungsten bar during the sintering process, and avoiding the adhesion phenomenon caused by the accumulation of tungsten bars, thereby improving the quality of the finished tungsten bar. The linkage chassis is rotated to enable the rack to drive the gear to rotate, and the side gear and the rotating disk are coordinated to enable the tungsten bar to rotate along its own axis, further improving the uniformity of heating the tungsten bar and improving the yield rate of the finished tungsten bar.

Description

Technical Field

[0001] The present invention relates to the field of sintering technology, and more particularly to a support structure for sintering tungsten bars in a medium frequency furnace. Background Art

[0002] Sintering, the process of converting powdered materials into a dense body, is a traditional process. It has long been used to produce ceramics, powder metallurgy, refractories, and ultra-high-temperature materials. Generally speaking, the dense body obtained by sintering a powder after forming is a polycrystalline material with a microstructure composed of crystals, glass, and pores. The sintering process directly affects the grain size, pore size, and grain boundary shape and distribution within the microstructure, thereby influencing the material's properties.

[0003] With the increasing intensity of technological competition, tungsten, as an indispensable metal material in high-end industries, has an increasing demand for tungsten bars. Tungsten bars are generally produced by sintering. However, during the sintering process, the tungsten bars will stick to each other due to the high temperature, resulting in a decrease in the quality of the tungsten bars. The temperature at the center of the stacked tungsten bars is higher, making it impossible for the tungsten bars to be heated evenly, thus leading to product quality defects.

[0004] Therefore, we propose a support structure for sintering tungsten bars in a medium frequency furnace to effectively solve some problems existing in the prior art. Summary of the Invention

[0005] 1. Technical problems to be solved

[0006] In response to the problems existing in the prior art, the purpose of the present invention is to provide a support structure for sintering tungsten bars in a medium frequency furnace. A pair of sintering supporting barrels are connected to each other, and the tungsten bar is inserted into the linkage chassis inside the sintering supporting barrel on one side. During the high-temperature sintering process, the rotating shaft is rotated to make the separating circulation belt drive the tungsten bar to move back and forth inside the two sintering supporting barrels, so that the tungsten bars inside and outside continuously circulate and exchange positions, effectively avoiding the situation where the temperature of the tungsten bar at the center is higher, improving the uniformity of heating of the tungsten bar during the sintering process, and avoiding the adhesion caused by the accumulation of tungsten bars, thereby improving the quality of the finished tungsten bar. The linkage chassis is rotated to make the rack drive the gear to rotate, and the side gear and the rotating disk are used to make the tungsten bar rotate along its own axis, further improving the uniformity of heating of the tungsten bar and improving the yield of the finished tungsten bar.

[0007] 2. Technical solution

[0008] To solve the above problems, the present invention adopts the following technical solutions.

[0009] A support structure for sintering tungsten bars in a medium frequency furnace comprises a medium frequency furnace and a pair of sintering supporting barrels inside the furnace. The pair of sintering supporting barrels are connected to each other by a connecting section. A rotating shaft is provided at the bottom of the sintering supporting barrel for rotation. A motor corresponding to the position of the rotating shaft is provided inside the medium frequency furnace. The output end of the motor passes through the bottom of the sintering supporting barrel and is connected to the rotating shaft. A separating circulation belt is provided inside the left-end sintering supporting barrel. The separating circulation belt is connected to the outer wall of the rotating shaft. The separating circulation belt comprises an upper separating belt and a linkage chassis provided at its lower end. The separating belt is made of high-temperature resistant material. A plurality of reserved slots are provided at the upper end of the linkage chassis. A rotating disk is provided at the bottom of the reserved slot for rotation. A side gear is provided at the bottom of the rotating disk. A rack corresponding to the position of the side gear is provided at the bottom of the sintering supporting barrel. The rack is connected to the side gear through gear meshing. Tungsten bars are inserted into the reserved slots.

[0010] Furthermore, the separation zone includes a middle thermal storage layer, and protective layers are provided on both sides of the thermal storage layer. The thermal storage layer is made of high-temperature resistant heat-absorbing material.

[0011] Furthermore, a plurality of scraping cones are provided on the outer wall of the thermal storage layer, and the tips of the scraping cones are arranged from the outside to the inside.

[0012] Furthermore, a reinforcing rib is provided in the middle of the heat storage layer, and the reinforcing rib is formed by hingedly connecting a plurality of steel wires.

[0013] Furthermore, a rotation groove is opened on the side wall of the reserved groove, and a rotation limit block is provided inside the rotation groove. The rotation limit block includes an external rotation mother ring, and the rotation mother ring is fixedly connected to the rotating disk.

[0014] Furthermore, an expansion extrusion core is embedded on the side of the rotating mother ring close to the tungsten bar, and the expansion extrusion core is made of high-temperature expansion material.

[0015] Furthermore, a plurality of heat-conducting holes are equidistantly provided in a circular pattern on the outer wall of the sintering support barrel, and the inner wall of the heat-conducting hole is in a funnel structure with the opening extending from the outside to the inside.

[0016] Furthermore, a protective cover is rotatably provided on the upper end of the sintering supporting barrel, and an air-sealing pad corresponding to the position of the sintering supporting barrel is provided on the lower end of the protective cover. The air-sealing pad is made of steel, and the outer wall of the air-sealing pad is polished to obtain a rough surface.

[0017] Furthermore, the inner side wall of the connecting section is arranged in an arc shape, and the inner side wall of the connecting section is polished to obtain a smooth surface.

[0018] Furthermore, a plurality of heat exchange holes are provided on the outer wall of the separation zone, and the heat exchange holes are in a funnel structure with openings from the outside to the inside.

[0019] 3. Beneficial effects

[0020] Compared with the prior art, the advantages of the present invention are:

[0021] (1) This solution connects a pair of sintering barrels and inserts the tungsten bar into the linkage chassis inside the sintering barrel on one side. During the high-temperature sintering process, the rotating shaft is used to rotate the separating circulation belt to drive the tungsten bar to move back and forth inside the two sintering barrels, so that the tungsten bars on the inside and outside continuously exchange positions, effectively avoiding the high temperature of the tungsten bar at the center, improving the uniformity of heating of the tungsten bar during the sintering process, and avoiding the adhesion caused by the accumulation of tungsten bars, thereby improving the quality of the finished tungsten bar. The linkage chassis is used to rotate to drive the rack to rotate the gear, and the side gear and the rotating disk are used to make the tungsten bar rotate along its own axis, further improving the uniformity of heating of the tungsten bar and improving the yield rate of the finished tungsten bar.

[0022] (2) The separation zone in this scheme includes a middle thermal storage layer, and protective layers are provided on both sides of the thermal storage layer. The thermal storage layer is made of high-temperature resistant heat-absorbing material. The thermal storage layer absorbs a large amount of heat. When the heating of the tungsten bar is stopped, the heat in the thermal storage layer can be slowly released, so that the temperature of the tungsten bar can slowly drop, reducing the damage to the tungsten bar structure caused by too rapid temperature drop.

[0023] (3) In this scheme, a plurality of scraping cones are provided on the outer wall of the heat storage layer. The tips of the scraping cones are arranged from the outside to the inside. The scraping cones are used to clean the surface of the tungsten bar during its rotation, thereby reducing the dirt attached to the surface of the tungsten bar and affecting its heating uniformity.

[0024] (4) In this scheme, a reinforcing rib is provided in the middle of the heat storage layer. The reinforcing rib is formed by hingedly connecting multiple steel wires. The reinforcing rib is used to improve the strength of the separation zone and extend its service life.

[0025] (5) In this scheme, a rotation groove is provided on the side wall of the reserved groove, and a rotation limit block is provided inside the rotation groove. The rotation limit block includes an external rotation mother ring, which is fixedly connected to the rotation disk. An expansion extrusion core is embedded on the side of the rotation mother ring close to the tungsten bar. The expansion extrusion core is made of high-temperature expansion material. The expansion of the expansion extrusion core is used to extrude the tungsten bar when it is heated, thereby maintaining the stability of the tungsten bar during the sintering process. The rotation mother ring effectively avoids the situation where the expansion extrusion core is stuck in the rotation groove during the expansion process.

[0026] (6) The outer wall of the sintering support barrel in this scheme is provided with a plurality of heat conduction holes at equal intervals in a circular shape, and the inner wall of the heat conduction holes is a funnel structure with the openings from the outside to the inside. The heat conduction holes opening outward can effectively limit the heat loss, and at the same time can make the external heat gather into the inside of the sintering support barrel, further increasing the temperature inside the sintering support barrel.

[0027] (7) The sintering support barrel in this scheme is provided with a protective cover at the upper end thereof, and an air-sealing pad corresponding to the position of the sintering support barrel is provided at the lower end of the protective cover. The air-sealing pad is made of steel, and the outer wall of the air-sealing pad is polished to obtain a rough surface. The use of the air-sealing pad with a rough surface can effectively prevent heat loss and increase the temperature inside the sintering support barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0029] Figure 2 It is an exploded view of the main structure of the present invention;

[0030] Figure 3 This is a schematic diagram of the structure of the present invention when a tungsten rod is inserted;

[0031] Figure 4 This is a schematic diagram of the structure of the separation circulation belt of the present invention;

[0032] Figure 5 A partial cross-sectional view of the separation circulation belt of the present invention;

[0033] Figure 6 A partial cross-sectional view of the separator strip of the present invention;

[0034] Figure 7 This is a schematic diagram of the sintering support barrel structure of the present invention;

[0035] Figure 8 This is a schematic structural diagram of the main structure of the present invention during the sintering process;

[0036] Figure 9 It is a cross-sectional view of the main structure of the present invention during the sintering process.

[0037] Description of the numbers in the figure:

[0038] 1 sintering bearing barrel, 101 heat conduction hole, 102 rack, 11 protective cover, 12 connecting section, 13 rotating shaft, 2 dividing circulation belt, 21 dividing belt, 211 protective layer, 212 heat storage layer, 213 reinforcing rib, 214 scraping cone, 22 linkage chassis, 221 rotating groove, 222 rotating limit block, 2221 rotating mother ring, 2222 expansion extrusion core, 223 reserved groove, 224 rotating disk, 225 gear, 3 tungsten bar. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only 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 ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium, or internal communication between compatible components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0042] Example 1:

[0043] See also Figure 1-5 The sintering mechanism 12 is a kind of sintering mechanism 2, and the sintering mechanism 2 is a kind of sintering mechanism 2.

[0044] See also Figure 5A rotation groove 221 is provided on the side wall of the reserved groove 223, and a rotation limit block 222 is provided inside the rotation groove 221. The rotation limit block 222 includes an external rotation mother ring 2221, and the rotation mother ring 2221 is fixedly connected to the rotating disk 224. An expansion extrusion core 2222 is embedded in the rotating mother ring 2221 near the side of the tungsten bar 3. The expansion extrusion core 2222 is made of high-temperature expansion material. The expansion extrusion core 2222 is heated and expanded to extrude the tungsten bar 3, thereby maintaining the stability of the tungsten bar 3 during the sintering process. The rotating mother ring 2221 effectively avoids the situation where the expansion extrusion core 2222 is stuck in the rotation groove 221 during expansion.

[0045] See also Figure 6 The separation zone 21 includes a middle thermal storage layer 212, and protective layers 211 are provided on both sides of the thermal storage layer 212. The thermal storage layer 212 is made of high-temperature resistant heat-absorbing material. The thermal storage layer 212 absorbs a large amount of heat. When the heating of the tungsten bar 3 is stopped, the heat in the thermal storage layer 212 can be slowly released, so that the temperature of the tungsten bar 3 can slowly drop, reducing the damage to the tungsten bar structure caused by too rapid temperature drop.

[0046] The outer wall of the heat storage layer 212 is provided with a plurality of scraping cones 214, and the tips of the scraping cones 214 are arranged from the outside to the inside. When the tungsten bar 3 rotates, the scraping cones 214 cooperate to clean the surface of the tungsten bar 3, thereby reducing the dirt attached to the surface of the tungsten bar 3 and affecting its heating uniformity.

[0047] A reinforcing rib 213 is provided in the middle of the heat storage layer 212. The reinforcing rib 213 is formed by hingedly connecting a plurality of steel wires. The reinforcing rib 213 is used to improve the strength of the separating strip 21 and extend its service life.

[0048] See also Figure 7 The outer wall of the sintering carrier barrel 1 is provided with a plurality of heat-conducting holes 101 at equal intervals in a circular shape. The inner wall of the heat-conducting holes 101 is a funnel structure with the openings from the outside to the inside. The heat-conducting holes 101 opening outward can effectively limit the heat loss, and at the same time can make the external heat gather into the inside of the sintering carrier barrel 1, further increasing the temperature inside the sintering carrier barrel 1.

[0049] A protective cover 11 is rotatably provided at the upper end of the sintering carrier barrel 1, and an air-sealing pad corresponding to the position of the sintering carrier barrel 1 is provided at the lower end of the protective cover 11. The air-sealing pad is made of steel material, and the outer wall of the air-sealing pad is polished to obtain a rough surface. The use of the rough surface of the air-sealing pad can effectively prevent heat loss and increase the temperature inside the sintering carrier barrel 1.

[0050] It should be added here that the inner wall of the connecting section 12 is arc-shaped and polished to obtain a smooth surface. The outer wall of the dividing zone 21 is provided with multiple heat exchange holes, which are funnel structures with openings from the outside to the inside.

[0051] When the staff uses this bracket to sinter the tungsten rod 3, please refer to Figure 8-9 First, the tungsten bar 3 is inserted into the linkage chassis 22 inside the sintering supporting barrel 1 on one side. During the high-temperature sintering process, the rotating shaft 13 is rotated to make the separating circulation belt 2 drive the tungsten bar 3 to move back and forth inside the two sintering supporting barrels 1, so that the tungsten bars 3 on the inside and outside are constantly circulated and exchanged positions, effectively avoiding the situation where the temperature of the tungsten bar 3 at the center is higher, improving the uniformity of heating of the tungsten bar 3 during the sintering process, and at the same time avoiding the adhesion caused by the accumulation of tungsten bars 3, thereby improving the quality of the finished tungsten bar 3. The linkage chassis 22 is rotated to make the rack drive the gear 225 to rotate, and cooperate with the side gear and the rotating disk 224 to make the tungsten bar 3 rotate along its own axis, further improving the uniformity of heating of the tungsten bar 3 and improving the yield of the finished tungsten bar.

[0052] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed by the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A support structure for sintering tungsten bars in an intermediate frequency furnace, comprising an intermediate frequency furnace and a pair of sintering support barrels (1) therein, characterized in that: A pair of sintering supporting barrels (1) are connected to each other through a connecting section (12). A rotating shaft (13) is provided at the bottom of the sintering supporting barrel (1). A motor corresponding to the position of the rotating shaft (13) is provided inside the intermediate frequency furnace. The output end of the motor passes through the bottom of the sintering supporting barrel (1) and is connected to the rotating shaft (13). A separating circulation belt (2) is provided inside the left end of the sintering supporting barrel (1). The separating circulation belt (2) is connected to the outer wall of the rotating shaft (13). The separating circulation belt (2) includes an upper separating belt (21) and a lower separating belt (21). The linkage chassis (22) is provided with a plurality of reserved grooves (223) at the upper end of the linkage chassis (22), a rotating disk (224) is rotatably provided at the bottom of the reserved groove (223), a side gear is provided at the bottom of the rotating disk (224), a rack (102) corresponding to the position of the side gear is provided at the bottom of the sintering support barrel (1), the rack (102) is meshed and connected to the side gear through a gear (225), and a tungsten bar (3) is inserted into the inside of the reserved groove (223); The separation zone (21) includes a middle heat storage layer (212), protective layers (211) are provided on both sides of the heat storage layer (212), and the heat storage layer (212) is made of a high-temperature resistant heat-absorbing material; a plurality of scraping cones (214) are provided on the outer wall of the heat storage layer (212), and the tips of the scraping cones (214) are arranged from the outside to the inside; A rotation groove (221) is provided on the side wall of the reserved groove (223), a rotation limit block (222) is provided inside the rotation groove (221), the rotation limit block (222) comprises an external rotation mother ring (2221), the rotation mother ring (2221) is fixedly connected to the rotation disk (224), an expansion extrusion core (2222) is embedded on the side of the rotation mother ring (2221) close to the tungsten bar (3), and the expansion extrusion core (2222) is made of high-temperature expansion material.

2. A support structure for sintering tungsten bars in a medium frequency furnace according to claim 1, characterized in that: A reinforcing rib (213) is provided in the middle of the heat storage layer (212), and the reinforcing rib (213) is formed by hingedly connecting a plurality of steel wires.

3. The support structure for sintering tungsten bars in a medium frequency furnace according to claim 1, characterized in that: The outer wall of the sintering support barrel (1) is provided with a plurality of heat-conducting holes (101) at equal intervals in a circular pattern, and the inner wall of the heat-conducting hole (101) is in a funnel structure with an opening from the outside to the inside.

4. The support structure for sintering tungsten bars in a medium frequency furnace according to claim 1, characterized in that: The upper end of the sintering support barrel (1) is rotatably provided with a protective cover (11), and the lower end of the protective cover (11) is provided with an air-sealing pad corresponding to the position of the sintering support barrel (1). The air-sealing pad is made of steel material, and the outer wall of the air-sealing pad is polished to obtain a rough surface.

5. The support structure for sintering tungsten bars in a medium frequency furnace according to claim 1, characterized in that: The inner side wall of the connecting section (12) is arranged in an arc shape, and the inner side wall of the connecting section (12) is polished to obtain a smooth surface.

6. The support structure for sintering tungsten bars in a medium frequency furnace according to claim 1, characterized in that: The outer wall of the separation zone (21) is provided with a plurality of heat exchange holes, and the heat exchange holes are in a funnel structure with openings from the outside to the inside.

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