CN108319747A - A Calculation Method for the Shape Change of Runner in Casting System - Google Patents

A Calculation Method for the Shape Change of Runner in Casting System Download PDF

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CN108319747A
CN108319747A CN201711372711.1A CN201711372711A CN108319747A CN 108319747 A CN108319747 A CN 108319747A CN 201711372711 A CN201711372711 A CN 201711372711A CN 108319747 A CN108319747 A CN 108319747A
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runner
shape
cross
sectional area
volume
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崔洺诚
刘洪福
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Jilin Daming Hydraulic Member Casting Technology Development Co ltd
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Jilin Daming Hydraulic Member Casting Technology Development Co ltd
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Priority to CN202210030416.2A priority patent/CN114357793A/en
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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/20—Design optimisation, verification or simulation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
    • B22C9/082—Sprues, pouring cups
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/10—Geometric CAD
    • G06F30/17—Mechanical parametric or variational design

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  • General Physics & Mathematics (AREA)
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  • Pure & Applied Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

The invention relates to a calculation method for the change of the shape of a transverse runner of a casting pouring system, which relates to the field of casting and fills the blank of the calculation method for the change of the shape of the transverse runner of the casting pouring system, wherein a relational expression is established by a volume method and the calculation of the change of the shape of the transverse runner is carried out, namely VH ∑ Aru ×L H, VH is the volume of the transverse runner, ×L Aru is the cross-sectional area of the transverse runner, ×L H is the length of the transverse runner, known VH1 VH2, VH1 and VH2 are the volumes of the transverse runners before and after the change of the shape of the transverse runner, ×L 3Aru1 × ×L H1 is deduced, ∑ Aru2 ×L H2, ∑ Aru ∑ and ∑ Aru ∑ H ∑ are the cross-sectional areas before and after the change of the shape of the transverse runner, ∑ H ∑ and ∑ H ∑ are respectively the lengths of the cross-sectional area before and after the change of the shape of the transverse runner, and ∑ H ∑ are deduced, the simple and accurate calculation process.

Description

一种铸造用浇注系统横浇道形状改变的计算方法A Calculation Method for the Shape Change of Runner in Casting System

技术领域technical field

本发明涉及铸造技术领域，具体涉及一种铸造用浇注系统横浇道形状改变的计算方法。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.

背景技术Background technique

铸造用浇注系统是运用了水力学原理建立起来，并被逐渐完善的。铸型中引导液态金属流入型腔的通道称为浇注系统，浇注系统由浇口杯、横浇道、阻流片、内浇口等组成。横浇道的作用主要是用于减缓液态金属的流动和避免熔渣进入型腔。横浇道的设计：横浇道的数据由内浇口截面积关系式或查表(见《铸造手册》)获得。内浇口截面积关系式如下：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, spoilers, 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:

式中：Agmin为内浇口最小控流面积(单位㎝2)；G为流经内浇道Ag的金属液重量(单位kg)；u为浇注系统的流量损耗因数；t为充填型腔的时间(单位s)；Hp为平均静压力头高度(单位cm)。In the formula: A gmin is the minimum flow control area of the ingate (unit cm 2 ); G is the weight of molten metal flowing through the ingate Ag (unit kg); u is the flow loss factor of the gating system; t is the filling cavity The time (unit s); Hp is the average static pressure head height (unit cm).

采用内浇口截面积乘以1.1～1.5的系数就会得到横浇道的截面积数据，横浇道的截面积数据再乘以横浇道长度，就是横浇道的体积。The cross-sectional area data of the runner can be obtained by multiplying the cross-sectional area of the gate by a coefficient of 1.1 to 1.5, and the cross-sectional area data of the runner is multiplied by the length of the runner to obtain the volume of the runner.

关于横浇道形状改变的计算，目前铸造界还没有相关的理论和方法。如果没有横浇道形状改变换算方法，又要实现满足铸造条件，只能依靠减少型腔来完成工艺设计；减少型腔就是减少产量，从而增加生产成本。Regarding the calculation of the shape change of the runner, there is no relevant theory and method in the foundry industry at present. If there is no conversion method for runner shape change, and the casting conditions must be met, the process design can only be completed by reducing the cavity; reducing the cavity means reducing the output, thereby increasing the production cost.

发明内容Contents of the invention

为了填补铸造用浇注系统横浇道形状改变的计算方法的空白，本发明提供一种铸造用浇注系统横浇道形状改变的计算方法。In order to fill the gap in the calculation method for the shape change of the runner of the casting system, the invention provides a calculation method for the shape change of the runner of the casting system.

本发明为解决技术问题所采用的技术方案如下：The technical scheme that the present invention adopts for solving technical problems is as follows:

本发明的一种铸造用浇注系统横浇道形状改变的计算方法，以体积法来建立关系式并进行横浇道形状改变的计算，已知的，横浇道体积等于横浇道截面积乘以横浇道长度，即VH＝∑Aru×LH式(1)，VH为横浇道体积，∑Aru为横浇道截面积，LH为横浇道长度；A method for calculating the shape change of the runner of a casting gating system according to the present invention uses the volume method to establish a relational expression and calculate the shape change of the runner. It is known that the volume of the runner is equal to the cross-sectional area of the runner multiplied by Take the length of the runner, that is, VH=∑Aru×LH formula (1), VH is the volume of the runner, ∑Aru is the cross-sectional area of the runner, and LH is the length of the runner;

当铸造用浇注系统横浇道的形状改变时，其对应的横浇道长度发生改变而横浇道形状改变前后的横浇道体积不变，即VH1＝VH2式(2)，VH1为横浇道形状改变前的横浇道体积，VH2为横浇道形状改变后的横浇道体积；When the shape of the runner of the casting gating system changes, the length of the corresponding runner changes and the volume of the runner before and after the shape of the runner changes, that is, VH1=VH2 (2), VH1 is the runner The volume of the runner before the shape of the runner is changed, and VH2 is the volume of the runner after the shape of the runner is changed;

通过式(1)和式(2)推导出式(3)，即∑Aru1×LH1＝∑Aru2×LH2式(3)，∑Aru1为横浇道形状改变前的横浇道截面积，LH1为横浇道形状改变前的横浇道长度，∑Aru2为横浇道形状改变后的横浇道截面积，LH2为横浇道形状改变后的横浇道长度；Formula (3) is deduced from formula (1) and formula (2), that is, ∑Aru1×LH1=∑Aru2×LH2 Formula (3), ∑Aru1 is the cross-sectional area of the runner before the shape of the runner is changed, and LH1 is The length of the runner before the shape of the runner is changed, ΣAru2 is the cross-sectional area of the runner after the shape of the runner is changed, and LH2 is the length of the runner after the shape of the runner is changed;

通过横浇道形状改变前后的横浇道截面积与横浇道形状改变前后的横浇道长度的关系式推导得出铸造用浇注系统横浇道形状改变后的横浇道截面积，即∑Aru2＝∑Aru1×LH1/LH2，已知的，横浇道形状改变前的横浇道截面积∑Aru1、横浇道形状改变前的横浇道长度LH1、横浇道形状改变后的横浇道长度LH2。The cross-sectional area of the runner in the casting gating system after the shape change of the runner is deduced from the relationship between the cross-sectional area of the runner before and after the shape of the runner and the length of the runner before and after the shape of the runner is changed, that is, Σ Aru2=∑Aru1×LH1/LH2, known, runner cross-sectional area ∑Aru1 before runner shape change, runner length LH1 before runner shape change, runner after runner shape change The track length LH2.

本发明的有益效果是：The beneficial effects of the present invention are:

本发明的一种铸造用浇注系统横浇道形状改变的计算方法，是以体积法来建立关系式并进行横浇道形状改变的计算，即横浇道形状改变前的横浇道体积与横浇道形状改变后的横浇道体积应该相等，使用体积法导出了新的横浇道截面积关系式。A method for calculating the shape change of the runner of a casting gating system according to the present invention uses the volume method to establish a relational expression and calculate the shape change of the runner, that is, the volume of the runner before the shape of the runner changes and the volume of the runner. The volume of the runner after the shape of the runner is changed should be equal, and a new cross-sectional area relation of the runner is derived by using the volume method.

本发明的计算方法，简单1个关系式，一目了然，可以准确地利用原横浇道截面积设计出新的横浇道截面积数据；能够充分利用有效的工作面积进行工艺设计，而不会因此而减少型腔数量使之减少产量；利用现代计算工具，使铸造工艺设计简单、快捷、准确；数据精确，立见结果。The calculation method of the present invention has a simple relational formula, which is clear at a glance, can accurately use the original runner sectional area to design new runner sectional area data; can make full use of the effective working area for process design, and will not And reduce the number of cavities to reduce production; use modern calculation tools to make casting process design simple, fast and accurate; accurate data, immediate results.

具体实施方式Detailed ways

本发明的一种铸造用浇注系统横浇道形状改变的计算方法，是以体积法来建立关系式并进行横浇道形状改变的计算。由于铸件的浇注过程是一个用液态金属填充的过程，也就是在一定的时间内控制一定的流量的问题。阻流片是控制流量的，使前面的横浇道里的熔渣有充足的时间上浮。所以，它与体积有关，与形状无关。由此可知，VH＝∑Aru×LH式(1)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)

式(1)中：VH为横浇道体积；∑Aru为横浇道截面积；LH为横浇道长度。In formula (1): VH is the runner volume; ∑Aru is the cross-sectional area of the runner; LH is the length of the runner.

如果需要改变铸造用浇注系统横浇道的形状，一般都是横浇道的长度发生了变化，在这个形状变化的过程中，如果要计算横浇道形状，需要满足的条件是：横浇道形状改变前的横浇道体积与横浇道形状改变后的横浇道体积应该相等，即VH1＝VH2式(2)，式(2)中，VH1为横浇道形状改变前的横浇道体积，VH2为横浇道形状改变后的横浇道体积。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: runner The volume of the runner before the shape change and the runner volume after the shape change of the runner should be equal, that is, VH1=VH2 formula (2), in the formula (2), VH1 is the runner before the shape of the runner is changed Volume, VH2 is the volume of the runner after the shape of the runner is changed.

通过式(1)和式(2)可以推导出式(3)，即∑Aru1×LH1＝∑Aru2×LH2式(3)，式(3)中，∑Aru1为横浇道形状改变前的横浇道截面积，LH1为横浇道形状改变前的横浇道长度，∑Aru2为横浇道形状改变后的横浇道截面积，LH2为横浇道形状改变后的横浇道长度。Formula (3) can be deduced from formula (1) and formula (2), that is, ∑Aru1×LH1=∑Aru2×LH2 formula (3), in formula (3), ∑Aru1 is the cross runner before the shape change The cross-sectional area of the runner, LH1 is the length of the runner before the shape of the runner is changed, ΣAru2 is the cross-sectional area of the runner after the shape of the runner is changed, and LH2 is the length of the runner after the shape of the runner is changed.

已知条件是：横浇道形状改变前的横浇道截面积∑Aru1、横浇道形状改变前的横浇道长度LH1、横浇道形状改变后的横浇道长度LH2；The known conditions are: runner cross-sectional area ΣAru1 before runner shape change, runner length LH1 before runner shape change, runner length LH2 after runner shape change;

整理出实用关系式：Sort out the practical relationship:

∑Aru2＝∑Aru1×LH1/LH2 (4)∑Aru2＝∑Aru1×LH1/LH2 (4)

式(4)中：∑Aru1为横浇道形状改变前的横浇道截面积，LH1为横浇道形状改变前的横浇道长度，∑Aru2为横浇道形状改变后的横浇道截面积，LH2为横浇道形状改变后的横浇道长度。In formula (4): ∑Aru1 is the cross-sectional area of the runner before the shape of the runner is changed, LH1 is the length of the runner before the shape of the runner is changed, and ∑Aru2 is the cross-sectional area of the runner after the shape of the runner is changed area, and LH2 is the length of the runner after the shape of the runner is changed.

以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。The above is only a preferred embodiment of the present invention, it should be pointed out that, for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (1)

1.一种铸造用浇注系统横浇道形状改变的计算方法，其特征在于，以体积法来建立关系式并进行横浇道形状改变的计算，已知的，横浇道体积等于横浇道截面积乘以横浇道长度，即VH＝∑Aru×LH式(1)，VH为横浇道体积，∑Aru为横浇道截面积，LH为横浇道长度；1. A calculation method for the shape change of the runner of the gating system for casting, characterized in that the relational expression is established by the volume method and the calculation of the shape change of the runner is carried out. It is known that the volume of the runner is equal to the volume of the runner The cross-sectional area is multiplied by the length of the runner, that is, VH=∑Aru×LH Formula (1), VH is the volume of the runner, ∑Aru is the cross-sectional area of the runner, and LH is the length of the runner; 当铸造用浇注系统横浇道的形状改变时，其对应的横浇道长度发生改变而横浇道形状改变前后的横浇道体积不变，即VH1＝VH2式(2)，VH1为横浇道形状改变前的横浇道体积，VH2为横浇道形状改变后的横浇道体积；When the shape of the runner of the casting gating system changes, the length of the corresponding runner changes and the volume of the runner before and after the shape of the runner changes, that is, VH1=VH2 (2), VH1 is the runner The volume of the runner before the shape of the runner is changed, and VH2 is the volume of the runner after the shape of the runner is changed; 通过式(1)和式(2)推导出式(3)，即∑Aru1×LH1＝∑Aru2×LH2式(3)，∑Aru1为横浇道形状改变前的横浇道截面积，LH1为横浇道形状改变前的横浇道长度，∑Aru2为横浇道形状改变后的横浇道截面积，LH2为横浇道形状改变后的横浇道长度；Formula (3) is deduced from formula (1) and formula (2), that is, ∑Aru1×LH1=∑Aru2×LH2 Formula (3), ∑Aru1 is the cross-sectional area of the runner before the shape of the runner is changed, and LH1 is The length of the runner before the shape of the runner is changed, ΣAru2 is the cross-sectional area of the runner after the shape of the runner is changed, and LH2 is the length of the runner after the shape of the runner is changed; 通过横浇道形状改变前后的横浇道截面积与横浇道形状改变前后的横浇道长度的关系式推导得出铸造用浇注系统横浇道形状改变后的横浇道截面积，即∑Aru2＝∑Aru1×LH1/LH2，已知的，横浇道形状改变前的横浇道截面积∑Aru1、横浇道形状改变前的横浇道长度LH1、横浇道形状改变后的横浇道长度LH2。The cross-sectional area of the runner in the casting gating system after the shape change of the runner is deduced from the relationship between the cross-sectional area of the runner before and after the shape of the runner and the length of the runner before and after the shape of the runner is changed, that is, Σ Aru2=∑Aru1×LH1/LH2, known, runner cross-sectional area ∑Aru1 before runner shape change, runner length LH1 before runner shape change, runner after runner shape change The track length LH2.
CN201711372711.1A 2017-12-19 2017-12-19 A Calculation Method for the Shape Change of Runner in Casting System Pending CN108319747A (en)

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CN106623795A (en) * 2016-12-09 2017-05-10 河北工业大学 Running and feeding system on DISA line of small-size cylinder gray iron castings and design method of running and feeding system

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