CN102423801B - Method for mold filling water simulation of cast - Google Patents

Method for mold filling water simulation of cast Download PDF

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Publication number
CN102423801B
CN102423801B CN 201110384125 CN201110384125A CN102423801B CN 102423801 B CN102423801 B CN 102423801B CN 201110384125 CN201110384125 CN 201110384125 CN 201110384125 A CN201110384125 A CN 201110384125A CN 102423801 B CN102423801 B CN 102423801B
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CN
China
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file
casting
cast
water
sand mold
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CN 201110384125
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Chinese (zh)
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CN102423801A (en
Inventor
康进武
郝小坤
聂刚
胡毅森
黄天佑
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清华大学
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Priority to CN 201110384125 priority Critical patent/CN102423801B/en
Publication of CN102423801A publication Critical patent/CN102423801A/en
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Publication of CN102423801B publication Critical patent/CN102423801B/en

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Abstract

The invention discloses a method for mold filling water simulation of a cast, which belongs to the technical field of casting. The method comprises the following steps: performing slicing layer by layer along a certain fixed direction through a three-dimensional CAD (computer aided design) software scaling sand mold model, generating a computer file, introducing the computer file into a laser engraving machine for machining, sequentially performing positioning, fixing, assembly and bonding on a layer sheet which is well machined to get a mold cavity model of the cast, further mounting a pouring system on the model and completing the manufacturing of the integral model. A casting mold cavity is manufactured by adopting the laser engraving or the machining method based on an acrylic sheet, the size precision of the casting mold cavity is high, the operation is simple, the cost is relatively low, the casting mold cavity is not limited by the complexity of the cast, and the manufacturing of the model in any shape can be realized.

Description

A kind of method of mold filling water simulation of cast

Technical field

The invention belongs to casting technology field, be specifically related to a kind of method of mold filling water simulation of cast.

Background technology

In casting, casting quality and liquid metal to fill type closely related, casting flaw such as pore, be mingled with, sand washing, misrun, cold shut etc. all with running gate system and liquid metal to fill the type flow behavior relevant.What prior art can't realize direct observation of liquid state metal well fills the type flow condition.The general the earliest filling time that adopts the electrode contacts method to measure the part in the cavity filling process owing to be subjected to the restriction of collecting test point, is difficult to the whole stowing operation of direct reacting metal liquid more.The liquid metal of present foundry goods fills type computer simulation emulation technology and is widely used, but error and confidence level also are difficult to determine.The type technology is filled in the simulation of original adoption water, namely according to the theory of similarity and the correlation criterion of fluid simulation, carries out actual cast (generally adopting lucite) in see-through model, the flow process of observation of liquid state.But do not solve the problem that transparent complicated casting mold cavity is made, just simply piece together with transparency glass plate, be difficult to reflect the true form of casting mold cavity, therefore can not be applied to intricate casting.

Summary of the invention

The object of the present invention is to provide a kind of method of mold filling water simulation of cast.

A kind of method of mold filling water simulation of cast, carry out in accordance with the following steps:

(1) according to counter its sand mold file of asking of Casting Three-dimensional entity file, dwindle according to 1: 1~1: 10 ratio, and on the sand mold file Design Orientation hole;

(2) according to making foundry goods local section principle constant or that variation is minimum that foundry goods is carried out piecemeal, each piece successively dissects along the direction of section variation minimum the sand mold file according to 1/10~1/100 thickness of foundry goods minimum dimension, generate the synusia file, import to laser engraving machine, carve sand mold die cavity profile and locating hole are numbered the synusia file that processes;

(3) the synusia file is fixed, compresses, assembles, bonds, locating hole interpolation alignment pin positions, and obtains foundry goods die cavity model, and isolated part is by being bonded in advance last synusia or the later layer sheet positions in the synusia file;

(4) adopt the lucite tube of Scaling and threeway, four-way connection to connect the formation running gate system, cup adopts the transparent plastic funnel of Scaling, be installed in sprue top, running gate system is connected with the casting mold cavity model, and stick with glue knot position, seal junction, obtain water simulation complete model;

(5) adopt water tank and water pump to consist of the water casting mechanism, middle priming valve control cast flow is equal to the actual casting pouring time duration of pouring, control cast flow speed;

(6) adopt high-speed camera and camera to observe the video recording of taking pictures 1~8 angle, fill and add coloring agent and baton round in the type water in order to follow the tracks of the mobile of water.

Describedly according to the anti-process of its sand mold file of asking of Casting Three-dimensional entity file be: bottom, left side, right side, front side, rear side at the external cuboid profile of Casting Three-dimensional entity file respectively amplify 10~50mm, with this position and size configurations cuboid, then deduct the Casting Three-dimensional entity file with this cuboid, obtain the sand mold file of this foundry goods; Or the Casting Three-dimensional entity file amplified the cast model that obtains amplifying in 1.1~1.3 ratio, the cast model that then will amplify deducts the sand mold file that the Casting Three-dimensional entity file obtains hull shape.

Beneficial effect of the present invention: the present invention is based on acrylic board and adopt the method for laser engraving or machining to make casting mold cavity, the casting mold cavity dimensional accuracy is high, simple to operate, cost is relatively low, and be not subjected to the restriction of foundry goods complexity, can realize the modelling of arbitrary shape, in the casting water analogue test, unique advantage be arranged.

Description of drawings

Fig. 1 is the casting process schematic diagram;

Wherein, 1-rising head, 2-foundry goods.

Fig. 2 is the anti-sand mold file map of obtaining of foundry goods;

Wherein, 3-sand mold, 4-locating hole, 5-die cavity.

Fig. 3 is that the synusia profile diagram is dissectd in sand mold file A-A position;

Wherein, 3-sand mold, 4-locating hole, 5-die cavity.

Fig. 4 is the water analogue test system;

Wherein, 6-high-speed camera, 7-casting mold cavity model, 8-running gate system, 9-baton round, 10-dyeing water, 11-water valve, 12-water pump, 13-water tank.

Fig. 5 is the section in a certain cross section that goes out of foundry goods laser engraving.

Fig. 6 is each side of the hydraulic model of foundry goods;

Wherein, figure is the left side of model a); Figure b) be right flank; Figure c) be the result that the bottom is taken.

Fig. 7 is that the fill type liquid level of certain foundry goods when 30s shows the result.

The specific embodiment

The present invention will be further described below in conjunction with the drawings and specific embodiments.

Adopt water analogue test system as shown in Figure 4, this system is comprised of high-speed camera 6, casting mold cavity model 7, running gate system 8, baton round 9, dyeing water 10, water valve 11, water pump 12, water tank 13.

A kind of method of mold filling water simulation of cast, carry out in accordance with the following steps:

(1) foundry goods 2 (as shown in Figure 1) with rising head 1, this casting dimension is 6685mm*4840mm*2508mm, weight 75t.According to the three-dimensional process moulding file of this foundry goods, the Casting Three-dimensional entity file is amplified the cast model that obtains amplifying in 1.1 times ratio, the cast model that then will amplify deducts the sand mold file that cast model obtains hull shape.This sand mold file comprises sand mold 3, locating hole 4 and die cavity 5 (Fig. 2-3), carries out scaled down with 1: 10, and on sand mold the Design Orientation hole.

(2) according to this foundry goods feature, its body directions X section variation is less, and its Y-direction and Z direction section variation are large, so this foundry goods piecemeal not, and sand mold is piecemeal not also.1/10 (2mm) according to minimum dimension carries out step section along directions X, generates the synusia file.The synusia file is imported laser engraving machine process, label is carried out in each section (as shown in Figure 5) that processes in order.

(3) synusia is fixed in order, compresses, assembles, bonds, locating hole interpolation screw rod positions, and obtains foundry goods die cavity model.

(4) adopt Lucite tube and threeway, four-way connection etc. connect and compose running gate system, cup adopts transparent plastic funnel, is installed in sprue top, running gate system is connected with the casting mold cavity model, and stick with glue knot position, seal junction, obtain the water simulation and use complete model, as shown in Figure 6.

(5) type simulated is filled in the water cast, and it is 4L/s that injection flow speed is watered in control valve control.

(6) adopt high-speed camera and camera to observe the video recording of taking pictures 3 angles, fill and add baton round in the type water in order to follow the tracks of flowing of water.

The effect that this example is implemented:

Fig. 7 is the hydraulic analogy cavity filling process that high-speed camera is taken this foundry goods, and filling time is 61s.The black plastic bead is the trace particle in the cavity filling process among the figure, demonstrates the uphill process of liquid level.As can be seen from the figure, in the casting process, both sides liquid level integral body is steady rising, and difference in height appears in the part, because sprue is distributed in foundry goods one end, process corrections can be mobile to the foundry goods middle part with cast gate.

Claims (2)

1. the method for a mold filling water simulation of cast is characterized in that, carries out in accordance with the following steps:
(1) according to counter its sand mold file of asking of Casting Three-dimensional entity file, dwindle according to the ratio of 1:1 ~ 1:10, and on the sand mold file Design Orientation hole;
(2) according to making foundry goods local section principle constant or that variation is minimum that foundry goods is carried out piecemeal, each piece successively dissects along the direction of section variation minimum the sand mold file according to 1/10 ~ 1/100 thickness of foundry goods minimum dimension, generate the synusia file, import to laser engraving machine, carve sand mold die cavity profile and locating hole are numbered the synusia file that processes;
(3) the synusia file is fixed, compresses, assembles, bonds, locating hole interpolation alignment pin positions, and obtains foundry goods die cavity model, and isolated part is by being bonded in advance last synusia or the later layer sheet positions in the synusia file;
(4) adopt the lucite tube of Scaling and threeway, four-way connection to connect the formation running gate system, cup adopts the transparent plastic funnel of Scaling, be installed in sprue top, running gate system is connected with the casting mold cavity model, and stick with glue knot position, seal junction, obtain water simulation complete model;
(5) adopt water tank and water pump to consist of the water casting mechanism, middle priming valve control cast flow is equal to the actual casting pouring time duration of pouring, control cast flow speed;
(6) adopt high-speed camera and camera to observe the video recording of taking pictures 1 ~ 8 angle, fill and add coloring agent and baton round in the type water in order to follow the tracks of the mobile of water.
2. the method for described a kind of mold filling water simulation of cast according to claim 1, it is characterized in that, describedly according to the anti-process of its sand mold file of asking of Casting Three-dimensional entity file be: the Casting Three-dimensional entity file is amplified the cast model that obtains amplifying in 1.1 ~ 1.3 ratio, and the cast model that then will amplify deducts the sand mold file that the Casting Three-dimensional entity file obtains hull shape.
CN 201110384125 2011-11-28 2011-11-28 Method for mold filling water simulation of cast CN102423801B (en)

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CN 201110384125 CN102423801B (en) 2011-11-28 2011-11-28 Method for mold filling water simulation of cast

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CN102423801B true CN102423801B (en) 2013-03-27

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102909356B (en) * 2012-10-12 2014-09-24 清华大学 Hydraulic simulation device capable of controlling ingot segregation and method
CN103691921B (en) * 2013-12-20 2015-07-15 清华大学 Manufacturing method of cavity model for casting mold filling hydraulics simulation
CN109520704A (en) * 2019-01-21 2019-03-26 中国工程物理研究院材料研究所 A kind of Filling Processes of Castings simulator and method

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JP4402513B2 (en) * 2004-05-07 2010-01-20 本田技研工業株式会社 Casting mold simulation method and casting model
JP2006061935A (en) * 2004-08-26 2006-03-09 Mitsubishi Heavy Ind Ltd Simulated casting plan and casting plan, and method, device and program for preparing them
JP2010058136A (en) * 2008-09-02 2010-03-18 Okayama Prefecture Industrial Promotion Foundation Molding simulation device and molding simulation method
CN101992272B (en) * 2009-08-12 2013-01-09 机械科学研究总院先进制造技术研究中心 Self-adaptive casting mould manufacture method for casting
CN101716649A (en) * 2009-11-17 2010-06-02 中国航天科技集团公司第九研究院第十六研究所 Lost sand casting process based on photocuring rapid forming
CN102069148B (en) * 2010-12-21 2013-01-02 宁夏共享集团有限责任公司 Method for casting brake disc for high-speed locomotive

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