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Casting device and casting method with spiral magnetic field

A helical magnetic field and magnetic field technology, which is applied in the field of casting devices with a helical magnetic field, can solve problems such as coarse tissue, adhesion, and affecting product quality, and achieve the effects of improving quality, improving uniformity, and reducing the effect of magnetic field

Active Publication Date: 2022-03-08
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Aiming at the problem that the casting gate area of ​​the product produced by the existing low (poor) pressure casting device is coarse, inclusions are easy to appear, and the product quality is not ideal, the invention provides a casting device with a spiral magnetic field, which can effectively solve the problem of casting The structure of the gate area is coarse, and at the same time, it solves the problem that inclusions such as oxide film are easy to adhere to the wall of the intermediate pipe and the riser pipe, and enter the final casting, which affects the quality of the product

Method used

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  • Casting device and casting method with spiral magnetic field
  • Casting device and casting method with spiral magnetic field
  • Casting device and casting method with spiral magnetic field

Examples

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Effect test

Embodiment 1

[0052] A casting device with a spiral magnetic field is used for low (differential) pressure casting production process, and its specific structure and working principle will be described in detail below.

[0053] Such as figure 1 As shown, the casting device includes a holding furnace 1 , a casting mold 2 , an intermediate pipe 3 , a riser pipe 4 and a magnetic field generator 5 .

[0054] Among them, the holding furnace 1 is a device for storing the melt and keeping the melt warm. There is a liquid rising port 11 and a compressed gas inlet 12 of the holding furnace. The compressed gas inlet 12 of the holding furnace is connected to an external gas source. It should be noted that since the melt in the low differential pressure casting process enters the mold cavity from bottom to top, the liquid outlet 11 needs to be arranged at the upper end of the holding furnace 1 . The holding furnace compressed gas inlet 12 needs to be arranged above the melt, so it needs to be arranged...

Embodiment 2

[0065] A casting method with a spiral magnetic field adopts the casting device without the sealing cover 6 in Example 1, and belongs to the low-pressure casting method. This embodiment is an A356 aluminum alloy low-pressure casting process, and the specific steps are as follows:

[0066] 1. The first stage of filling (turn on the magnetic field)

[0067] There is aluminum liquid stored in the holding furnace 1, and the compressed gas is filled into the holding furnace 1 through the compressed gas inlet 12 of the holding furnace, and the compensation pressure ΔP is automatically compensated by the equipment. The compensation time is usually 3s, and the aluminum liquid rises along the liquid riser 4 to intermediate pipe 3 ( Figure 5 in stage ①). Before the aluminum liquid is filled with the intermediate pipe 3, the magnetic field is controlled to be turned on by the casting device controller 7, and at the same time, the size and frequency of the current are controlled by the c...

Embodiment 3

[0081] A casting method with a spiral magnetic field adopts the casting device containing the sealing cover 6 in Embodiment 1, and belongs to the differential pressure casting method. This embodiment is an A356 aluminum alloy differential pressure casting process, and the specific steps are as follows:

[0082] 1. The first stage of filling (turn on the magnetic field)

[0083] Aluminum liquid is stored in the holding furnace 1. Before the first stage of mold filling, the compressed gas inlet 12 of the holding furnace and the compressed gas inlet 61 of the sealing cover are simultaneously injected into the holding furnace 1 and the sealing cover 6 with compressed gas 0.1 -1.0MPa( Figure 6 In the stage ①), this embodiment is 0.5MPa, and the delay is 2-5s to make the pressure balance, and this embodiment is 4s.

[0084] Then, the equipment automatically performs pressure compensation for 3 seconds, and then continues to fill the holding furnace 1 with compressed gas, and the a...

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Abstract

The invention discloses a casting device with a helical magnetic field and a casting method, which belong to the field of metal casting. The device includes a holding furnace, a mold, an intermediate pipe, a liquid riser and a magnetic field generator. The upper part of the holding furnace is provided with a liquid rising port and an inlet for compressed gas of the holding furnace; The lower end of the pipe extends into the holding furnace, the upper end extends out of the liquid riser, the lower end of the middle pipe is connected to the liquid riser, and the upper end is connected to the gate. The magnetic field generator is arranged on the outside of the intermediate pipe, and is used to apply a spiral magnetic field to the melt in the intermediate pipe, which can effectively solve the problem that the oxide film and other inclusions are easily attached to the gate and the pipe wall of the intermediate pipe, and reduce or prevent the oxide film. Wait for inclusions to enter the final product to avoid affecting the internal quality of the product. The method adopts the above-mentioned casting device, which can better refine and feed the casting, reduce the inclusions entering the casting, and improve the quality of the final product.

Description

technical field [0001] The invention belongs to the technical field of metal casting, and more specifically relates to a casting device and a casting method with a spiral magnetic field. Background technique [0002] Low (differential) pressure casting is a casting method in which the alloy melt is filled from the bottom gate of the mold through the rising liquid channel under the action of compressed gas, and solidified under pressure to obtain qualified castings. It has the characteristics of stable filling and crystallization under pressure. Solidification, dense casting structure, high production efficiency and other advantages. This process is mainly applicable to the casting of non-ferrous alloys, among which the low (differential) pressure casting of aluminum alloy is the most widely used. [0003] In the low (differential) pressure casting process, in order to control the internal quality of the casting, water or other media are usually passed through the pipeline i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D18/04B22D18/08
CPCB22D18/04B22D18/08
Inventor 刘利兵张云虎宋长江翟启杰
Owner SHANGHAI UNIV