Calculation method for shape changes of cross gates of gating systems for casting

A technology of pouring system and calculation method, which is applied in the direction of calculation, casting molding equipment, casting mold, etc., can solve the problems of increasing production cost and reducing output, and achieve the effect of reducing output, reducing the number of cavities, and accurate data

Inactive Publication Date: 2018-07-24
吉林省大洺液压件铸造技术科技开发有限公司
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Problems solved by technology

If there is no conversion method for runner shape change, but also to meet the casting conditions, the process design can only be completed by reducing the cavity; reducing the cavity means reducing production, thereby increasing production costs

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  • Calculation method for shape changes of cross gates of gating systems for casting

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Embodiment Construction

[0016] The present invention provides a calculation method for the shape change of the runner of the gating system for casting, which uses the volume method to establish a relational expression and calculate the shape change of the runner. Since the pouring process of castings is a process of filling with liquid metal, it is a matter of controlling a certain flow rate within a certain period of time. The spoiler is used to control the flow, so that the slag in the front runner has enough time to float up. So, it's about volume, not shape. It can be seen that VH=∑Aru×LH formula (1)

[0017] In formula (1): VH is the runner volume; ∑Aru is the cross-sectional area of ​​the runner; LH is the length of the runner.

[0018] If it is necessary to change the shape of the runner of the casting gating system, generally the length of the runner has changed. In the process of this shape change, if the shape of the runner is to be calculated, the conditions that need to be met are: runn...

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Abstract

The invention discloses a calculation method for shape changes of cross gates of gating systems for casting, relates to the field of casting, and aims at filling the gaps of calculation methods for shape changes of cross gates of gating systems for casting. According to the calculation method, a volume method is used for establishing a relational expression and calculating a shape change of a cross gate, namely, VH is equal to <Sigma>Aru*LH, wherein VH is a volume of the cross gate, <Sigma>Aru is a cross section area of the cross gate, and LH is a length of the cross gate; VH1 is equal to VH2,and VH1 and VH2 are volumes of the cross gate before and after the shape change of the cross gate; a formula <Sigma>Aru1 is equal to <Sigma>Aru2*LH2 is deduced, <Sigma>Aru1 and <Sigma>Aru2 are crosssections of the cross gate before and after the shape change of the cross gate, and LH1 and LH2 are lengths of the cross gates before and after the shape change of the cross gate; and a formula <Sigma>Aru2 is equal to <Sigma>Aru1*LH1/LH2 is deduced. The calculation method is simple in calculation process, rapid and correct.

Description

technical field [0001] The invention relates to the technical field of casting, in particular to a calculation method for the shape change of a runner of a gating system for casting. Background technique [0002] The gating system for casting is established by using the principle of hydraulics and gradually perfected. The channel that guides the liquid metal to flow into the cavity in the mold is called the gating system, and the gating system is composed of sprue cups, runners, baffles, and ingates. The function of the runner is mainly to slow down the flow of liquid metal and prevent slag from entering the cavity. Design of the runner: The data of the runner is obtained from the cross-sectional area relation of the ingate or look-up table (see "Casting Manual"). The relationship between the cross-sectional area of ​​the gate is as follows: [0003] [0004] In the formula: A gmin is the minimum flow control area of ​​the ingate (unit cm 2 ); G is the weight of molt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50B22C9/08
CPCB22C9/082G06F30/17G06F30/20
Inventor 崔洺诚刘洪福
Owner 吉林省大洺液压件铸造技术科技开发有限公司
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