A foundry furnace for hardware casting

Abstract

The application discloses a foundry furnace for hardware casting and particularly relates to the technical field of hardware casting, which comprises a mounting frame, two upwardly extending vertical plates of the mounting frame are jointly rotationally connected with a furnace body, the rotation axis of the furnace body is perpendicular to the axis of the furnace body, one of the rotation shafts extending out of the furnace body is coaxially fixedly sleeved with a first worm wheel, the first worm wheel is engaged with a first worm, the first worm is coaxially fixedly sleeved with a second worm wheel, the second worm wheel is engaged with a second worm, the vertical plate of the mounting frame is fixedly connected with a mounting seat which is rotationally connected with the first worm and the second worm, the second worm penetrates through the vertical plate of the mounting frame and is coaxially fixedly connected with a rotating disc, and the lead angle of at least one of the first worm and the second worm is less than or equal to the equivalent friction angle between the meshing gear teeth. The application is provided with two groups of worm and worm wheel for driving the crucible of the furnace body to tilt and pour the mold, so that the furnace body can hover at any tilting angle, the tilting angle of the furnace body does not need to be manually maintained, and the consumption of manpower is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of hardware casting technology, specifically relating to a casting furnace for hardware casting. Background Technology

[0002] A metal casting furnace is an industrial piece of equipment used to melt metals (such as iron, copper, and aluminum) for casting. It uses electricity, gas, or fuel oil to heat the metal raw materials into a liquid state, which is then poured into molds to form the final product. Widely used in the production of hardware and mechanical parts, it features controllable temperature and high melting efficiency, making it one of the core pieces of equipment in the casting industry.

[0003] Metal casting furnaces are typically quite heavy. In some furnaces, to maximize internal space utilization, the crucible is fitted tightly to the furnace wall, making it difficult to remove. Furthermore, when melting large quantities of metal, the heavy crucible makes manual casting impossible or dangerous. Therefore, a new type of casting furnace for metal casting is needed. Utility Model Content

[0004] To solve the above problems, this utility model discloses a casting furnace for hardware casting.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A casting furnace for metal casting includes a mounting frame. Two upwardly extending vertical plates of the mounting frame are rotatably connected to a furnace body, and the rotation axis of the furnace body is perpendicular to its own axis. One of the rotating shafts extending from the furnace body is coaxially fixedly fitted with a first worm gear, which meshes with a first worm. The first worm is coaxially fixedly fitted with a second worm gear, which meshes with a second worm. The vertical plates of the mounting frame are fixedly connected to a mounting seat that is rotatably connected to both the first and second worms. The second worm passes through the vertical plates of the mounting frame and is coaxially fixedly connected to a turntable. At least one of the first and second worms has a lead angle less than or equal to the equivalent friction angle between its meshing teeth.

[0007] As a preferred embodiment of this utility model, the furnace body includes an insulation shell, a crucible is placed inside the insulation shell, an induction coil is embedded in the insulation shell, and a furnace lid is placed over the top opening of the insulation shell.

[0008] As a preferred embodiment of this utility model, the top of the crucible is provided with a casting nozzle extending out of the insulation shell, and the insulation shell is provided with a notch adapted to the casting nozzle.

[0009] As a preferred embodiment of this utility model, a pressure ring is installed on the top of the heat insulation shell to press down the crucible, and the heat insulation shell is threadedly connected with a number of fixing bolts that pass through the pressure ring.

[0010] As a preferred embodiment of the present invention, the furnace cover is fixedly connected to an air inlet plate facing the crucible opening, and the air inlet plate is provided with a number of air outlets facing the crucible and evenly distributed in a ring shape, and the air inlet plate is connected to an air inlet pipe that penetrates the furnace cover.

[0011] As a preferred embodiment of this utility model, the two rotating shafts extending from the furnace body are coaxially fixedly fitted with bearings, and the two bearings are respectively fixedly embedded in the two vertical plates of the mounting frame.

[0012] In a preferred embodiment of this invention, the transmission ratio between the first worm and the first worm wheel is greater than 10, and the transmission ratio between the second worm and the second worm wheel is greater than 5.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. This application is equipped with two sets of worm gears to drive the crucible of the furnace body to tilt and cast the mold. Moreover, there is a self-locking between the worm and the meshing worm gear of this application. Therefore, the furnace body can be suspended at any tilt angle without the need for manual maintenance of the tilt angle of the furnace body, which reduces the consumption of manpower. At the same time, the tilt angle of the crucible can be precisely controlled, and the flow rate of molten metal can be precisely controlled, which improves the casting quality.

[0015] 2. This application is equipped with a nitrogen protective gas delivery device consisting of an air inlet pipe and an air inlet disc, which reduces the amount of oxygen in contact with molten metal, reduces the amount of oxides generated as impurities, and improves the utilization rate of metal materials.

[0016] Third, this application also includes a crucible secured by a pressure ring and fixing bolts. If the crucible is damaged after long-term use, the fixing bolts can be unscrewed, the pressure ring removed, and the crucible can be pulled out from the inner cavity of the insulation shell for replacement. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the first worm gear, the first worm, the second worm gear, the second worm, the mounting base, and the turntable in an embodiment of this utility model;

[0019] Figure 3 This is an exploded cross-sectional view of the furnace body and the air inlet pipe according to an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the intake pipe and intake disc in an embodiment of the present utility model.

[0021] List of identifiers in attached diagrams:

[0022] 1. Mounting bracket;

[0023] 2. Furnace body; 201. Insulation shell; 202. Crucible; 203. Induction coil; 204. Pressure ring; 205. Fixing bolts; 206. Furnace cover;

[0024] 3. First worm gear; 4. First worm; 5. Second worm gear; 6. Second worm; 7. Mounting base; 8. Turntable; 9. Intake pipe; 10. Intake plate. Detailed Implementation

[0025] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0026] Please see Figure 1-4 A casting furnace for metal casting includes a mounting frame 1. Two upwardly extending vertical plates of the mounting frame 1 are rotatably connected to a furnace body 2, and the rotation axis of the furnace body 2 is perpendicular to its own axis. Specifically, the bearing axis of the cylindrical furnace body 2 is perpendicular to the axis of the rotating shaft extending from the furnace body 2. One of the rotating shafts extending from the furnace body 2 is coaxially fixedly fitted with a first worm gear 3, which meshes with a first worm 4. The first worm 4 is coaxially fixedly fitted with a second worm gear 5, which meshes with a second worm 6. A mounting base 7 is fixedly connected to the vertical plate of the mounting frame 1 and is rotatably connected to both the first worm 4 and the second worm 6. The second worm 6 passes through the vertical plate of the mounting frame 1 and is coaxially fixedly connected to a turntable 8. At least one of the first worm 4 and the second worm 6 has a lead angle less than or equal to the equivalent friction angle between their meshing teeth. When the lead angle of the worm is less than or equal to the equivalent friction angle between its meshing teeth, there is a self-locking relationship between the worm and its meshing worm wheel, meaning only the worm can drive the worm wheel to rotate, and the worm wheel cannot drive the worm to rotate. At least one set of worm and worm wheel self-locking allows for [the following]. Due to the larger arrangement space for the first worm wheel 3, the transmission ratio between the first worm 4 and the first worm wheel 3 is greater than 10. Due to the smaller arrangement space for the second worm wheel 5, the transmission ratio between the second worm 6 and the second worm wheel 5 is greater than 5. The arrangement of two sets of worm and worm wheel makes manually rotating the turntable 8 to drive the furnace body 2 to tilt more effortlessly and precisely.

[0027] The two rotating shafts extending from the furnace body 2 are coaxially fixed with bearings, and the two bearings are respectively fixedly embedded in the two vertical plates of the mounting frame 1. The furnace body 2 and the mounting frame 1 are rotatably connected by bearings, which can reduce the resistance to the rotation of the heavy furnace body 2.

[0028] The furnace body 2 includes an insulation shell 201, within which a crucible 202 is placed. An induction coil 203 is embedded within the insulation shell 201, and a furnace lid 206 covers the top opening of the insulation shell 201. A pull ring is provided on the top of the furnace lid 206. Both ends of the induction coil 203 extend out of the insulation shell 201, and are respectively connected to the two poles of a power supply, which provides alternating current to the induction coil 203. Components such as the insulation shell 201, crucible 202, and furnace lid 206, which are close to the induction coil 203, are made of a material that cannot be heated by the induction coil 203. A casting nozzle extending out of the insulation shell 201 is provided on the top of the crucible 202, and the insulation shell 201 has a notch adapted to fit the casting nozzle.

[0029] The top of the insulation shell 201 is fitted with a pressure ring 204 to hold the crucible 202 in place. The insulation shell 201 is threaded with several fixing bolts 205 that pass through the pressure ring 204. If the crucible 202 is damaged after long-term use, the fixing bolts 205 can be unscrewed, the pressure ring 204 can be removed, and the crucible 202 can be pulled out of the inner cavity of the insulation shell 201 for replacement.

[0030] The furnace cover 206 is fixedly connected to an air inlet plate 10 that faces the opening of the crucible 202. The air inlet plate 10 is provided with several air outlets that face the crucible 202 and are evenly distributed in a ring. The air inlet plate 10 is connected to an air inlet pipe 9 that passes through the furnace cover 206. The air inlet pipe 9 is connected to a nitrogen delivery device. After the furnace cover 206 covers the opening of the insulation shell 201, the nitrogen delivered by the air inlet pipe 9 is slowly delivered into the crucible 202 through the evenly distributed ring of air outlets on the air inlet plate 10. The nitrogen is used as a protective gas for metal smelting to reduce the generation of oxides during metal smelting. Excess gas in the inner cavity of the furnace body 2 is discharged from the casting nozzle of the crucible 202.

[0031] Working principle:

[0032] In use, the metal material to be melted is added into the crucible 202, then the opening of the heat preservation shell 201 covers the furnace lid 206, and then the gas inlet pipe 9 delivers nitrogen gas into the crucible 202 through the annular evenly distributed gas outlet of the gas inlet plate 10. Then the induction coil 203 heats the metal material to a molten state. Finally, the furnace lid 206 can be removed and the molten metal can be poured into the mold.

[0033] When pouring molten metal, the turntable 8 is rotated, causing the turntable 8 to drive the second worm wheel 5 to rotate via the second worm 6. The second worm wheel 5 drives the first worm 4 to rotate, and the first worm 4 drives the first worm wheel 3 to rotate. The rotating first worm wheel 3 causes the furnace body 2 to tilt, so that the molten metal in the crucible 202 flows into the mold through its casting nozzle. Since there is a self-locking relationship between the worm and the meshing worm wheel of this application, the furnace body 2 can be suspended at any tilt angle without the need for manual maintenance of the tilt angle of the furnace body 2.

[0034] It should be noted that the above content merely illustrates the technical concept of this utility model and cannot be used to limit the scope of protection of this utility model. For those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and all such improvements and modifications fall within the scope of protection of the claims of this utility model.

Claims

1. A casting furnace for metal casting, comprising a mounting frame (1), characterized in that, The two upwardly extending vertical plates of the mounting frame (1) are rotatably connected to the furnace body (2), and the rotation axis of the furnace body (2) is perpendicular to its own axis. One of the rotating shafts extending from the furnace body (2) is coaxially fixedly sleeved with a first worm wheel (3). The first worm wheel (3) meshes with a first worm (4), and the first worm (4) is coaxially fixedly sleeved with a second worm wheel (5). The second worm wheel (5) meshes with a second worm (6). The vertical plate of the mounting frame (1) is fixedly connected with a mounting seat (7) that is rotatably connected to both the first worm (4) and the second worm (6). The second worm (6) passes through the vertical plate of the mounting frame (1) and is coaxially fixedly connected to a turntable (8). At least one of the first worm (4) and the second worm (6) has a lead angle that is less than or equal to the equivalent friction angle between its meshing teeth.

2. The casting furnace for hardware casting according to claim 1, characterized in that, The furnace body (2) includes a heat insulation shell (201), a crucible (202) is placed inside the heat insulation shell (201), an induction coil (203) is embedded in the heat insulation shell (201), and a furnace lid (206) is covered at the top opening of the heat insulation shell (201).

3. A casting furnace for hardware casting according to claim 2, characterized in that, The crucible (202) is provided with a casting nozzle extending out of the insulation shell (201) at the top, and the insulation shell (201) is provided with a notch adapted to the casting nozzle.

4. A casting furnace for hardware casting according to claim 2, characterized in that, The top of the insulation shell (201) is fitted with a pressure ring (204) that holds the crucible (202), and the insulation shell (201) is threaded with a number of fixing bolts (205) that pass through the pressure ring (204).

5. A casting furnace for hardware casting according to claim 2, characterized in that, The furnace cover (206) is fixedly connected to an air inlet plate (10) that opens toward the crucible (202), and the air inlet plate (10) is provided with a number of air outlets that are evenly distributed in a ring toward the crucible (202), and the air inlet plate (10) is connected to an air inlet pipe (9) that penetrates the furnace cover (206).

6. A casting furnace for hardware casting according to claim 1, characterized in that, The two rotating shafts extending from the furnace body (2) are coaxially fixed with bearings, and the two bearings are respectively fixedly embedded in the two vertical plates of the mounting frame (1).

7. A casting furnace for hardware casting according to claim 1, characterized in that, The transmission ratio between the first worm (4) and the first worm wheel (3) is greater than 10, and the transmission ratio between the second worm (6) and the second worm wheel (5) is greater than 5.

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