Design method suitable for electromagnetic pump low-pressure casting mold filling technology

A technology of low-pressure casting and design method, which is applied in the field of design and control of mold filling process in electromagnetic pump low-pressure casting, which can solve the problems of reducing casting quality, turbulent flow, and uniform cross-sectional area, and achieve the reduction of turbulent flow and gas volume Injection, avoiding spray and splash, ensuring the effect of forming quality

Inactive Publication Date: 2014-03-26
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual production, various castings have different shapes, and most of the castings cannot guarantee that their cross-sectional area is completely consistent throughout the height, and sometimes the difference is very large
If the same speed is used to fill the mold, it is easy to generate serious turbulence in large cross-sections and reduce the quality of castings

Method used

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  • Design method suitable for electromagnetic pump low-pressure casting mold filling technology
  • Design method suitable for electromagnetic pump low-pressure casting mold filling technology
  • Design method suitable for electromagnetic pump low-pressure casting mold filling technology

Examples

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Embodiment 1

[0036] Such as Figure 1-Figure 4As shown, the design method of the filling process of an aluminum alloy box with a relatively uniform wall thickness and a height of 750mm with a significant change in cross-sectional area:

[0037] The first step is to make a three-dimensional model of the casting process of the box, including the blank of the box, the gating system, and the riser;

[0038] In the second step, according to the three-dimensional model in the first step, the casting is sliced ​​and analyzed along the Z direction, that is, the pouring direction, such as figure 2 As shown, the height-sectional area distribution diagram A of the box is calculated c =f(z), height-area overlap ratio distribution map α c =f(z) and the height-volume distribution map V c =f(z), the interval between slices in the slice analysis is 1mm, or 3mm, or 5mm;

[0039] In the third step, according to the height-area overlap ratio distribution map α calculated in the second step c =f(z) and ...

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Abstract

The invention discloses a design method suitable for the electromagnetic pump low-pressure casting mold filling technology, and belongs to the technical field of electromagnetic pump low-pressure casting. The method aims at achieving the aim that the mold filling speed can be adjusted according to the size of the cross section in the electromagnetic pump low-pressure casting mold filling process, namely the mold filling pressure can be changed in good time. According to the technical scheme, the design method includes the following steps: (1) making a casting technology three-dimensional model of a casting, (2) carrying out slice analysis on the casting in the Z direction, namely the casting direction, (3) dividing the casting into a plurality of parts in the Z direction, namely the casting direction, (4) forming a pressure-time curve P(t) of the whole casting, (5) modifying the P(t) in the step (4) into a PM(t), (6) converting the pressure-time curve PM(t) into a current-time curve I(t), (7) installing a high-temperature laser liquid level distance meter above molten aluminum, and starting the high-temperature laser liquid level distance meter, (8) testing, and recording the initial position of a liquid level, and (9) installing a casting mold, and executing the low-pressure casting mold filling technology.

Description

technical field [0001] The invention discloses a design method suitable for the filling process of electromagnetic pump low-pressure casting, belongs to the technical field of electromagnetic pump low-pressure casting, and particularly relates to the design and control method of the filling process in electromagnetic pump low-pressure casting. Background technique [0002] Electromagnetic pump low-pressure casting is different from traditional pneumatic low-pressure casting. The air pressure generated by pneumatic low-pressure casting can be directly measured. During the casting process, the filling pressure and holding pressure can be collected at any time and fed back in real time to realize closed-loop control. The electromagnetic pump strictly follows the set parameters for pressure output. [0003] The power generated by the electromagnetic pump low-pressure casting is realized through the joint action of electric field and magnetic field. Compared with the traditional...

Claims

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Application Information

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IPC IPC(8): B22D18/04
Inventor 毛红奎徐宏党惊知侯击波张国伟
Owner ZHONGBEI UNIV
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