CN203371026U - Automatic pouring device for smelting of vacuum induction furnace - Google Patents

Abstract

The utility model discloses an automatic pouring device for vacuum induction furnace smelting, which comprises a ventilation connection device (3) connected with a gas source and a supporting turning mechanism, the supporting turning mechanism includes a sliding sleeve (15) and a sliding plate (12). , the support seat (5) and the sliding shaft (9), the sliding sleeve is symmetrically provided with a chute (8), and the sliding sleeve between the two chute is provided with an opening window (16), and the width of the opening window is larger than that of the crucible Outer diameter, the sliding shaft is movably connected with the sliding plate, the inner diameter of the sliding sleeve is larger than the outer diameter of the crucible, the sliding plate is provided with a supporting seat, and the outer diameter of the sliding plate and the supporting seat is not larger than the outer diameter of the crucible (13), The sliding shaft is provided with a shaft seat (6) and an airflow pressure bearing joint (10). The utility model can not only realize the rapid pouring and cooling of the melt, improve the melting efficiency, but also make the internal composition of the product uniform and the crystal grains finer. It can improve the mechanical and electrical properties, and at the same time, the ingot with the required shape and size can be obtained by changing the mold as needed.

Description

A vacuum induction furnace melting automatic pouring device

technical field

The utility model relates to a pouring device, in particular to an automatic pouring device for melting solid materials in a vacuum induction furnace.

Background technique

At present, solid materials (such as high-melting point metal Cu alloy, stainless steel, Ti alloy, etc.) often need to be smelted and poured in a vacuum induction furnace. There are two main methods of smelting and pouring, and the first method is solid The material is put into the crucible (such as graphite, molybdenum and tungsten crucible) in the induction coil in the vacuum melting chamber for melting. After melting to the required temperature of the process, it is taken out with the furnace to cool to normal temperature to obtain the smelted cast product. This melting method There are the following problems: one is that the cooling time with the furnace is long, and the production efficiency is low; The upper and lower density of the ingot and the distribution of internal components are uneven, the columnar crystals are developed, the grains are coarse, the mechanical and electrical properties are poor, and the shape of the ingot is fixed, which is not conducive to subsequent processing and sampling testing. The second method is spray casting, that is, adding various smelting solid materials into the quartz tube device in the melting chamber of the vacuum induction furnace for melting, and injecting the melt into the mold through air pressure spray casting. This method has the following problems: First, due to Quartz tubes are not resistant to high temperatures, so they can only smelt some solid materials with medium and low melting points, and their applicability is not strong. Second, quartz tubes are expensive and not durable. When the melting point is low, the molten material with a lower melting point is easy to drip out first through the quartz tube nozzle, which fails to achieve the desired melting effect.

Utility model content

Aiming at the problems existing in the smelting of high-melting point solid materials in the prior art, the utility model provides an automatic pouring device arranged in a vacuum melting chamber, which can automatically pour the melt from the crucible into the mold to realize After rapid cooling, an ingot of the desired shape can be obtained.

The technical solution adopted for the technical problem to be solved by the utility model is: the vacuum induction furnace smelting automatic pouring device includes a ventilating docking device connected to the gas source and a supporting turning mechanism, and the venting docking device and the supporting turning mechanism are arranged There is a ventilator, and the support turning mechanism includes a sliding sleeve, a sliding shaft, a sliding plate, a support seat and a crucible, and the sliding sleeve is symmetrically provided with chute, and the sliding sleeve between the chute is provided with an opening window, The width of the opening window is larger than the outer diameter of the crucible, the sliding shaft is movably connected with the sliding plate, and the supporting seat is arranged on the sliding plate, the outer diameter of the sliding plate and the supporting seat is not larger than the outer diameter of the crucible, and the inner diameter of the sliding sleeve is larger than the outer diameter of the crucible The sliding shaft is provided with a shaft seat and an airflow pressure bearing joint, and the lower end of the sliding sleeve is provided with an escape window. The shaft seat can stabilize the sliding plate at the upper end of the sliding sleeve and position the crucible in the induction coil. The sliding The air flow pressure bearing joint at one end of the shaft can move the sliding shaft axially under the impact of the air flow, and the axial movement of the sliding shaft can make the sliding shaft, together with the sliding plate, supporting seat and crucible, descend in the sliding sleeve and fall outward from the opening window .

The working process of the utility model is: fix the automatic pouring device in the vacuum melting chamber, connect the ventilation connecting device on the automatic pouring device with the gas source, and connect the sliding shaft together with the sliding plate, supporting seat and crucible (hereinafter referred to as the sliding assembly) Rise to the starting position, pull the sliding shaft to the blocking position, so that the sliding assembly is suspended on the upper end of the sliding sleeve, and at the same time, the airflow pressure bearing joint on the sliding shaft is close to the end of the ventilation pipe. When the sliding plate is fixed on the upper end of the sliding sleeve, Just enough to make the crucible supported on the sliding plate be located in the induction coil, and when it is heated by electricity to melt the solid into a liquid state and reach the temperature and time required by the process, press the external air valve of the induction furnace equipment to ventilate the ventilation pipe, and the sliding shaft is under the impact pressure of the airflow Under the action, it moves axially to the other side. At this time, the sliding assembly can descend along the chute. When it falls to the lower end of the sliding sleeve, the sliding disc will Poured together with the crucible, so that the melt in the crucible can be quickly poured into the mold for cooling and forming. After the mold is cooled, the ingot is taken out to prepare for the next furnace melting. In preparation for the next furnace smelting, the sliding assembly can be lifted to the initial position, and the sliding shaft is pulled to the blocking position, so that the sliding assembly is suspended on the upper end of the sliding sleeve.

The utility model is set in the vacuum melting chamber, first supports the crucible and extends the crucible into the induction coil, when the solid melts into a liquid state and reaches the temperature and time required by the process, press the air valve to ventilate to move the sliding shaft and make the sliding assembly When it descends to the lower end of the sliding sleeve along the chute, it will be unstable and dumped, so that the melt in the crucible can be poured into the mold to realize automatic pouring. It can not only realize the rapid pouring and cooling of the melt, improve the melting efficiency, but also make the internal components of the product uniform. , the grain is more refined, the mechanical and electrical properties are improved, and the ingot of the required shape and size can be obtained by changing the mold as needed.

Description of drawings

Fig. 1 is a schematic diagram of the working structure of the utility model in a vacuum smelting chamber,

Fig. 2 is a schematic diagram of the cross-sectional structure of A-A in Fig. 1,

Fig. 3 is a schematic diagram of the B-B sectional structure of Fig. 1,

Fig. 4 is a schematic diagram of a partial structure in direction C of Fig. 1 ,

FIG. 5 is a schematic diagram of a D-D cross-sectional structure in FIG. 1 .

In the figure, 1. Ventilation pipe 2. Connecting nut 3. Ventilation connection device 4. Induction coil 5. Support seat 6. Axle seat 7. Avoidance window 8. Chute 9. Sliding shaft 10. Airflow pressure bearing joint 11. Sleeve Ring 12, sliding plate 13, crucible 14, connecting arm 15, sliding sleeve 16, opening window 17, fastening screw 18, tilting angle fine-tuning screw 19, vacuum melting chamber 20, partial groove.

Detailed ways

In Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5, the vacuum induction furnace smelting automatic pouring device is set in the vacuum smelting chamber 19, which includes a ventilation connecting device 3 connected to the upper end gas source and a support at the lower end Turning mechanism, a ventilation pipe 1 is arranged between the ventilation connecting device and the supporting turning mechanism, and a connecting nut 2 is arranged between the ventilation pipe and the ventilation connecting device. 14 is connected with the supporting turning mechanism, and the supporting turning mechanism includes a sliding sleeve 15, a sliding plate 12, a bearing seat 5 and a sliding shaft 9, and two sliding grooves 8 are arranged symmetrically on the axis of the sliding sleeve, and two sliding grooves are arranged on the upper end of the sliding groove. A shaft seat, an opening window 16 is arranged on the sliding sleeve between the two slide grooves, the width of the opening window is larger than the outer diameter of the crucible 13 (graphite), the sliding shaft is movably connected with the sliding plate, and the sliding plate is connected by threads A support seat 5 is provided, and the support seat is made of antimagnetic high-melting point metal (such as molybdenum, etc.), the crucible is fixed on the support seat through threads, the outer diameter of the sliding plate and the support seat is not larger than the outer diameter of the crucible, and the inner diameter of the sliding sleeve greater than the outer diameter of the crucible, the sliding shaft is provided with two shaft seats 6, the left end of the sliding shaft is provided with an airflow pressure bearing joint 10, the airflow pressure bearing joint is trumpet-shaped, and the matching clearance between the sliding shaft and the chute should meet the requirements of The sliding shaft can move up and down freely in the chute, and the sliding shaft can not swing greatly in the chute. The lower end of the chute is provided with a partial groove 20. The partial groove is close to the side of the avoidance window, and the avoidance window is set opposite to the opening window. , the eccentric groove can make the sliding assembly fall buffer and the center of gravity shift unstable (the sliding assembly includes the sliding shaft together with the sliding plate, support seat and crucible), which is beneficial to the pouring of the crucible. The distance between the shaft seats is the inner diameter of the sliding sleeve, and the upper end of the sliding sleeve is tightened The fixed screw 17 is connected with a ferrule 11, and the ferrule and the sliding sleeve can also be made as a whole. The diameter of the shaft seat is larger than the width of the opening slot. When the induction furnace is working, the shaft seat on the sliding shaft is embedded in the upper end of the chute to make the sliding shaft At this time, the crucible just extends into the induction coil 4. When the smelting reaches the temperature and time required by the process, press the corresponding air valve of the vacuum induction furnace equipment, and the airflow pressure bearing joint at one end of the sliding shaft can be moved under the impact pressure of the airflow. Make the sliding shaft move axially, the shaft seat slides away from the chute, and the axial movement of the sliding shaft can make the sliding assembly descend in the sliding sleeve and fall outward from the opening window, in order to prevent the sliding plate and crucible from colliding with the sliding sleeve when falling Collision, the lower end of the sliding sleeve is provided with an avoidance window 7 and a tilting angle fine-tuning screw 18 . The sliding sleeve, the sliding disc and the sliding shaft are all made of high strength and antimagnetic materials (such as 304 stainless steel).

Claims (3)

1. An automatic pouring device for vacuum induction furnace smelting, which includes a ventilation connection device (3) connected to a gas source and a support turning mechanism, and a ventilation pipe (1) is arranged between the ventilation connection device and the support turning mechanism. The feature is: the support turning mechanism includes a sliding sleeve (15), a sliding disc (12), a support seat (5) and a sliding shaft (9), and the sliding sleeve is symmetrically provided with chute (8), between the two sliding The sliding sleeve between the grooves is provided with an opening window (16), the opening window width is larger than the outer diameter of the crucible (13), and the lower end of the sliding sleeve is provided with an avoidance window (7). The sliding shaft is movably connected with the sliding plate, and the sliding The disc is provided with a supporting seat, the outer diameter of the sliding disc and the supporting seat is not larger than the outer diameter of the crucible, the inner diameter of the sliding sleeve is larger than the outer diameter of the crucible, and the sliding shaft is provided with a shaft seat (6) and an airflow pressure bearing joint (10 ), the shaft seat can fix the sliding disc in the sliding sleeve and position the crucible in the induction coil (4), and the airflow pressure bearing joint at one end of the sliding shaft can move the sliding shaft axially under the impact pressure of the airflow, The axial movement of the sliding shaft can make the sliding shaft, together with the sliding plate, the support seat and the crucible, descend in the sliding sleeve and fall outward from the opening window. 2. An automatic pouring device for vacuum induction furnace smelting according to claim 1, characterized in that: an offset trough (20) is provided at the lower end of the chute (8). 3. An automatic pouring device for vacuum induction furnace smelting according to claim 1, characterized in that: the support seat (5) is made of antimagnetic high melting point metal.

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