CN219817952U - Pulsed magnetic field melt processing device for aluminum alloy filter box - Google Patents

Abstract

The utility model relates to an aluminum alloy filter box pulse magnetic field melt processing device, which is characterized in that: the aluminum melt filtering box comprises an aluminum alloy filtering box body and an aluminum melt flow channel arranged in the box body, wherein at least one group of windings are arranged above the aluminum melt flow channel, a liquid inlet and a liquid outlet of the aluminum melt flow channel are arranged on the box body, a filter for filtering aluminum melt is arranged in the box body, and the aluminum melt is output from the liquid outlet after being subjected to the action of a magnetic field of the windings and the filtration of the filter; according to the utility model, the winding is arranged on the top cover of the filter box, the winding carries out pulse magnetic field treatment on the aluminum melt in the filter box, the aluminum melt is filtered by the filter after being subjected to pulse magnetic field treatment and then is output for casting, and the grain structure is refined after the cast ingot is solidified, so that the grain refiner added in the production process can be replaced.

Description

Aluminum alloy filter box pulse magnetic field melt processing device

Technical areas:

The utility model relates to the technical field of metal solidification and casting devices, in particular to a pulse magnetic field melt processing device for an aluminum alloy filter box.

Background technique:

The filter box during the solidification process of aluminum alloy is a device for fine filtration of aluminum melt. It can remove impurities in the aluminum melt, especially particle inclusions, improve the purity of the aluminum melt, and improve the casting of aluminum alloy ingots. Quality; by increasing the thickness of the filter plate in the filter box, reducing the size of the filter holes, slowing down the flow rate of the aluminum melt, and prolonging the residence time of the aluminum melt in the filter box, the removal efficiency of inclusions can be effectively improved; in addition, by Installing a heating body on the filter box to supplement heat reduces the temperature loss of the aluminum melt during the solidification process, improves the fluidity of the aluminum melt in the filter box, and stabilizes the flow rate and uniformly removes impurities.

However, the existing filter box only has the function of removing impurities. In view of the casting defects such as coarseness, segregation, shrinkage holes and other solidification structures of aluminum alloy ingots, most of them use the method of adding refiners to refine the structure of aluminum alloy ingots. The aluminum melt is processed by After filtration in the filter box, part of the added refiner is removed by filtration, and the refining efficiency of the solidified tissue is weakened. In addition, part of the refiner may segregate in the melt after filtration, resulting in a weakened refining effect of the solidified tissue.

For example, the Chinese patent "An aluminum alloy grain refining rod adding device" publication number CN201848509U was retrieved. The device includes an aluminum liquid chute and an aluminum titanium boron rod. It is characterized in that a resistance heater is installed in the aluminum liquid chute. A resistance heater is installed at the end of the rod that does not enter the aluminum liquid. A baffle with a tapered hole in the middle is added to the cross section of the chute where the aluminum titanium boron rod is added. The resistance heater of this utility model can increase the temperature of the aluminum liquid and the aluminum titanium boron rod. Reduce the temperature difference between the aluminum titanium boron rod and the aluminum liquid, so that the aluminum titanium boron rod can be fully melted in the aluminum liquid.

Disadvantages of the above-mentioned existing technologies:

1. The traditional addition of grain refining agents to achieve the purpose of refining grains will cause other impurities to be introduced into the aluminum alloy melt, affecting the purity of the aluminum alloy melt, and the refining agent is easy to deviate in the aluminum alloy melt. aggregation, forming inclusions during the solidification process; at the same time, the refining effect is related to the quality of the refining agent, and the refining effect is unstable.

2. The grain refiner requires continuous investment and the production cost of the enterprise is high.

3. Among the existing technical means of applying physical external fields for refinement, there are problems such as large equipment size, complex structure, contact with the melt, and low refinement efficiency.

Contents of the invention:

In view of the above existing problems, the purpose of this utility model is to provide a pulse magnetic field melt processing device for an aluminum alloy filter box, which can ensure the filtering effect of the filter box and has the function of grain refinement, which can reduce grain fineness. The amount of chemical agent added.

This utility model adopts the following solutions to achieve:

The utility model's pulse magnetic field melt processing device for an aluminum alloy filter box is characterized in that it includes an aluminum alloy filter box body and an aluminum melt flow channel arranged in the box body. Above the aluminum melt flow channel, there is at least A set of windings, the box body is provided with an inlet and a liquid outlet of the aluminum melt flow channel, the box body is provided with a filter for filtering the aluminum melt, and the aluminum melt passes through the magnetic field of the winding. After being filtered by the filter, it is output from the liquid outlet.

Further, the above-mentioned winding is installed on the through hole on the top cover, and the lower part of the winding extends into the box and is higher than the aluminum melt.

Further, the above-mentioned top cover includes a bottom plate covering the upper surface of the box, a boss is provided in the middle of the bottom plate, at least one of the through holes is provided on the boss, and a support for supporting the bottom plate is installed on the boss. Bracket for fixing the winding.

Further, a heating pipe is provided on the above-mentioned boss.

Further, there are two sets of parallel strip-shaped perforations on the above-mentioned boss, and windings are provided in the perforations. The windings are composed of coils and iron cores. The coils are made of high-temperature-resistant rectangular cross-section enameled wires, and the iron cores It is made of laminated silicon steel sheets. The coil is evenly wound around the outside of the iron core. There is a gap inside the coil and between the coil and the iron core to serve as a cooling air duct. The surface of the coil is wrapped with high-temperature insulating tape to have insulating properties.

Furthermore, the outer circumference of the above-mentioned coil is provided with a winding protective sleeve. The winding protective sleeve is made of austenitic stainless steel, and is lined with a silicon dioxide plate on the inside to provide heat insulation and not affect the distribution of the magnetic field.

Further, the distance between the iron core of the above-mentioned winding and the aluminum melt in the filter box is 10-20mm.

Furthermore, the pulse current waveform of the magnetic field generated by the above winding is a triangular wave, the peak current is 300-600A, the duty cycle is 20%-50%, the pulse frequency is 10-50Hz, and the magnetic induction intensity range in the aluminum melt is 10mT-170mT. ; Control the intensity of the pulse magnetic field by changing the excitation current of the pulse magnetic field to adapt to different aluminum melt flow rates when casting aluminum alloy ingots of different specifications to ensure good grain effects.

Further, the temperature of the aluminum melt in the filter box is 700-730°C, and the action time of the pulse magnetic field on the aluminum melt in the filter box is 84s-100s.

The utility model uses a pulse magnetic field in an aluminum alloy filter box to achieve grain refinement of aluminum melt. It is characterized in that: the aluminum alloy filter box pulse magnetic field melt processing device includes an aluminum alloy filter box body and an aluminum alloy filter disposed in the box body. Melt flow channel, at least one set of windings is provided above the aluminum melt flow channel, the liquid inlet and liquid outlet of the aluminum melt flow channel are provided on the box, and there is a filter aluminum in the box. When the melt filter is used, the aluminum melt is input from the liquid inlet of the aluminum melt flow channel, and after passing through the magnetic field of at least one set of windings, it is filtered by the filter in the filter box and then output from the liquid outlet; through The pulse magnetic field processes the aluminum melt in the filter box. On the one hand, it ensures the filtration effect of the filter box. On the other hand, it makes the filter box have the function of grain refinement, reducing the amount of grain refiner added, and ensuring the effective refinement of aluminum alloy castings. The refining effect of the solidified structure of the ingot; the distance between the iron core of the winding and the aluminum melt in the filter box is 10-20mm; the pulse current waveform of the magnetic field generated by the winding is a triangular wave, the peak current is 300-600A, and the duty cycle is 20%-50%, the pulse frequency is 10-50Hz, the magnetic induction intensity range in the aluminum melt is 10mT-170mT; the temperature of the aluminum melt in the filter box is 700-730°C, and the pulse magnetic field affects the aluminum melt in the filter box. The body's action time is 84s-100s.

The utility model installs a winding on the top cover of the filter box, and the winding performs pulse magnetic field treatment on the aluminum melt in the filter box. After the aluminum melt is processed by the pulse magnetic field, it is filtered by the filter and then output for casting. After the ingot solidifies, the utility model realizes The refinement of the grain structure can replace the grain refiner added during the production process.

Picture description:

The utility model will be further described below in conjunction with the accompanying drawings;

Figure 1 is a three-dimensional schematic diagram of the utility model's aluminum alloy filter box pulse magnetic field melt processing device for filtering and electromagnetic processing of aluminum melt;

Figure 2 is a cross-sectional view of the pulse magnetic field processing device installed above the filter box in Embodiment 1;

Figure 3 is a schematic diagram of the magnetic induction intensity distribution on the surface of aluminum melt treated by pulse magnetic field in Example 1;

Figure 4 is a schematic diagram of the direction of magnetic induction intensity in the aluminum melt treated by pulse magnetic field in Example 1;

Figure 5 is a schematic diagram of the flow rate of the aluminum melt in the pulse magnetic field treatment filter box in Example 1;

Figure 6 is a top view of the filter box body (removing the top cover, etc.);

Figure 7 is a schematic diagram of the A-A cross-sectional structure of Figure 6;

Figure 8 is a schematic diagram of the B-B cross-sectional structure of Figure 6;

Figure 9 is a schematic structural diagram of the C-C section in Figure 6.

Detailed ways:

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

The utility model aluminum alloy filter box pulse magnetic field melt processing device includes an aluminum alloy filter box body 1 and an aluminum melt flow channel 2 arranged in the box body. At least one set of aluminum melt flow channels 2 is provided above the box body. The winding 3, the box 1 is provided with the liquid inlet 4 and the liquid outlet 5 of the aluminum melt flow channel, and the box is equipped with a filter 6 for filtering the aluminum melt, and the filter 6 is a filter plate Or a pipeline filter, the aluminum melt is output from the liquid outlet after being filtered by the magnetic field of the winding.

Specifically, the filter structure in the filter box body 1 includes a concave cavity 101 laid with fireproof bricks, and a relatively independent feed material located next to the concave cavity (near the liquid inlet 4 and the liquid outlet 5). The cavity 102 and the discharge cavity 103 have a longitudinal partition 104 between the concave cavity and the feed cavity and the discharge cavity. There is a transverse partition 105 between the feed cavity and the discharge cavity. The concave cavity is provided with a filter in the middle of the depth direction. 6, the filter separates the concave cavity into relatively independent upper chamber 101a and lower chamber 101b. The upper chamber 101a and the liquid inlet 4 are connected through the feed channel 106, where a partial section of the feed channel 106 is located in the feed chamber 102 Inside, the lower chamber 101b is connected to the liquid outlet 5 through the discharge channel 107. A partial section of the discharge channel 107 is located in the discharge cavity 103. After the aluminum melt is input from the liquid inlet 4, it flows upward through the feed channel 106. In the cavity 101a, the aluminum melt in the upper cavity 101a is affected by the magnetic field of the winding 3 on the one hand, and on the other hand passes through the filter 6 due to its gravity, flows into the lower cavity 101b, and then passes through the discharge channel 107. After the discharge channel 107 is full, it is output from the liquid outlet 5.

The installation of the windings is further described below,

The above-mentioned winding is installed on the through hole 701 on the top cover 7. The lower part of the winding extends into the box and is higher than the aluminum melt. The aluminum melt is located in the upper cavity 101a. The specific top cover 7 includes a cover on the upper surface of the box. The bottom plate 702 is provided with a boss 703 in the middle of the bottom plate. The boss 703 is provided with at least one of the through holes 701, preferably two, that is, there are two sets of parallel strips on the boss. Perforations, each with a winding.

The winding is fixedly disposed through the bracket 704 installed on the boss 703. The body of the top cover (including the bottom plate 702 and the boss 703) and the bracket are made of high heat insulation materials. In order to maintain the temperature of the upper surface of the aluminum melt, the boss 703 A heating pipe 705 is provided inside the base plate 702 .

The detailed structure of winding 3 is described below. Winding 3 consists of two parts: coil 301 and iron core 302. Iron core 302 is an "n" shaped iron core, that is, each winding contains one iron core and two coils. The coils wound on two "n"-shaped iron cores form a series circuit. After energization, the magnetic field directions of the two magnetic poles of the "n"-shaped iron core are opposite; the coils are wound with high-temperature resistant rectangular cross-section enameled wire, and the iron core is made of silicon steel sheets. The coil is evenly wound around the outside of the iron core. There is a gap inside the coil and between the coil and the iron core to serve as a cooling air duct. The surface of the coil is wrapped with high-temperature insulating tape to have insulation properties; the winding is air-cooled (cooling fan) Allow to cool.

For reasonable design, the outer circumference of the coil 301 is provided with a winding protective sleeve 303. The winding protective sleeve is made of austenitic stainless steel and is lined with a silicon dioxide plate on the inside to provide heat insulation and not affect the magnetic field. Distribution.

In order to achieve a better effect, the distance between the iron core of the above winding and the aluminum melt in the filter box is 10-20mm. The pulse current waveform of the magnetic field generated by the winding is a triangular wave, the peak current is 300-600A, and the duty cycle is 20%- 50%, the pulse frequency is 10-50Hz, the magnetic induction intensity range in the aluminum melt is 10mT-170mT; the temperature of the aluminum melt in the filter box is 700-730°C, and the action time of the pulse magnetic field on the aluminum melt in the filter box is 84s -100s, the intensity of the pulse magnetic field is controlled by changing the excitation current of the pulse magnetic field to adapt to different aluminum melt flow rates when casting aluminum alloy ingots of different specifications to ensure good grain effects.

The utility model can be adapted to the aluminum casting width range: 1400~1600mm, the thickness range: 400~500mm, and is suitable for the production of various brands of aluminum alloy ingots.

The utility model uses a pulse magnetic field in an aluminum alloy filter box to achieve grain refinement of aluminum melt. The aluminum alloy filter box pulse magnetic field melt processing device includes an aluminum alloy filter box box and an aluminum melt flow channel located in the box. , at least one set of windings is provided above the aluminum melt flow channel, the box is provided with an inlet and a liquid outlet of the aluminum melt flow channel, and the box has a filter for filtering the aluminum melt. When in use, the aluminum melt is input from the liquid inlet of the aluminum melt flow channel, and after passing through the magnetic field of at least one set of windings, it is filtered by the filter in the filter box and then output from the liquid outlet; the filter is filtered by the pulse magnetic field The aluminum melt is processed in the box. On the one hand, it ensures the filtration effect of the filter box. On the other hand, the filter box has the function of grain refinement, reducing the amount of grain refiner added, and ensuring the effective refinement of the solidification structure of the aluminum alloy ingot. Refinement effect; the distance between the iron core of the winding and the aluminum melt in the filter box is 10-20mm; the pulse current waveform of the magnetic field generated by the winding is a triangular wave, the peak current is 300-600A, and the duty cycle is 20%-50% , the pulse frequency is 10-50Hz, the magnetic induction intensity range in the aluminum melt is 10mT-170mT; the temperature of the aluminum melt in the filter box is 700-730°C, and the action time of the pulse magnetic field on the aluminum melt in the filter box is 84s -100s.

Specific embodiments, as shown in Figure 3 is a schematic diagram of the magnetic induction intensity distribution on the surface of aluminum melt treated by pulse magnetic field. This figure shows that the coil has 243 turns (9 × 27 turns), the current is 300A, the frequency is 20Hz, and the duty cycle is 30%. , the maximum magnetic induction intensity of the aluminum melt is 0.1639T. Figure 3 shows that the pulse magnetic field processing device can produce an effective pulse magnetic field effect on the aluminum melt in the filter box and refine the solidification structure of the aluminum alloy ingot.

In the present utility model, Figure 4 is a schematic diagram of the direction of the magnetic induction intensity of the aluminum melt in the filter box under the action of a pulse magnetic field. It can be seen from Figure 4 that the magnetic induction intensity on the surface of the aluminum melt is relatively strong. From the aluminum melt The magnetic induction intensity decreases downwards from the surface. The magnetic induction direction of the aluminum melt flows out from one end of the iron core and flows in from the other end of the iron core, forming a closed loop.

In the present utility model, Figure 5 shows the flow field of the aluminum melt in the filter box under the action of the pulse magnetic field. It can be seen from Figure 5 that the aluminum melt flows in the filter box in a regular spiral shape. The pulse magnetic field processing device The increase did not have a significant impact on the melt flow field, proving that the installation of the pulse magnetic field processing device has no adverse impact on the filtration effect of the filter box and ensures the filtration effect of the filter box.

The advantages of this utility model are:

(1) This utility model does not contact the melt and will not affect the purity of the aluminum alloy melt.

(2) The aluminum alloy pulse magnetic field melting and casting grain refining device is a single investment, and the use cost in the long run is much lower than that of the grain refining agent. Moreover, this utility model can replace the grain refining agent added during the production process, further reducing the cost. Enterprise production costs.

(4) Combined with the existing filter box, the equipment is small in size and simple in structure.

(5) The utility model enables the filter box to have the function of grain refinement while ensuring the filtering effect of the existing filter box.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it; although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: The specific implementation manner of the present utility model can be modified or some technical features can be equivalently replaced; without departing from the spirit of the technical solution of the present utility model, they should all be included in the scope of the technical solution claimed by the present utility model.

Claims (10)

1. An aluminum alloy rose box pulsed magnetic field melt processing apparatus, its characterized in that: the aluminum alloy filtering box comprises an aluminum alloy filtering box body and an aluminum melt flow channel arranged in the box body, wherein at least one group of windings are arranged above the aluminum melt flow channel, a liquid inlet and a liquid outlet of the aluminum melt flow channel are formed in the box body, a filter for filtering aluminum melt is arranged in the box body, and the aluminum melt is output from the liquid outlet after being filtered by the filter after being subjected to the action of a magnetic field of the windings.

2. The aluminum alloy filter tank pulse magnetic field melt processing device of claim 1, wherein: the winding is arranged on the perforation on the top cover, and the lower part of the winding stretches into the box body and is higher than the aluminum melt.

3. The aluminum alloy filter tank pulse magnetic field melt processing device of claim 2, wherein: the top cover comprises a bottom plate covered on the upper surface of the box body, a boss is arranged in the middle of the bottom plate, at least one through hole is formed in the boss, and a bracket for supporting the fixed winding is arranged on the boss.

4. The aluminum alloy filter tank pulse magnetic field melt processing apparatus of claim 3, wherein: and a heating pipe is arranged on the boss in a penetrating way.

5. The aluminum alloy filter tank pulse magnetic field melt processing apparatus of claim 3 or 4, wherein: the boss is provided with two groups of parallel strip-shaped perforations, the perforations are provided with windings, each winding is composed of a coil and an iron core, the coil is formed by winding high-temperature-resistant rectangular-section enameled wires, the iron core is formed by stacking silicon steel sheets, and the coil is uniformly wound on the outer side of the iron core, and gaps are reserved between the inside of the coil and between the coil and the iron core to serve as a heat dissipation air duct.

6. The aluminum alloy filter tank pulse magnetic field melt processing device as defined in claim 5, wherein: the periphery of the coil is sleeved with a winding protective sleeve, and the winding protective sleeve is made of austenitic stainless steel.

7. The aluminum alloy filter tank pulse magnetic field melt processing apparatus of claim 6, wherein: the distance between the iron core of the winding and the aluminum melt in the filter box is 10-20mm.

8. The aluminum alloy filter tank pulse magnetic field melt processing apparatus of claim 7, wherein: the pulse current waveform of the magnetic field generated by the winding is triangular wave, the peak current is 300-600A, the duty ratio is 20% -50%, the pulse frequency is 10-50Hz, and the magnetic induction intensity range in the aluminum melt is 10mT-170mT.

9. The aluminum alloy filter tank pulse magnetic field melt processing apparatus of claim 8, wherein: the temperature of the aluminum melt in the filter box is 700-730 ℃, and the action time of the pulse magnetic field on the aluminum melt in the filter box is 84-100 s.

10. The aluminum alloy filter tank pulse magnetic field melt processing device of claim 1, wherein: the filter box comprises a concave cavity body formed by laying fireproof bricks, a feeding cavity and a discharging cavity, wherein the feeding cavity and the discharging cavity are located beside the concave cavity body and are relatively independent, a longitudinal partition is arranged between the concave cavity body and the feeding cavity and between the concave cavity body and the discharging cavity, a transverse partition is arranged between the feeding cavity and the discharging cavity, a filter is arranged in the middle of the concave cavity body in the depth direction, the concave cavity body is divided into an upper cavity and a lower cavity which are relatively independent by the filter, the upper cavity is communicated with a liquid inlet through a feeding channel, a local section of the feeding channel is located in the feeding cavity, the lower cavity is communicated with a liquid outlet through a discharging channel, and a local section of the discharging channel is located in the discharging cavity.