JP2016179495A - Estimation method for casting crack, estimation device for casting crack, estimation program for casting crack, and memory medium with memorized estimation program for casting crack - Google Patents

Estimation method for casting crack, estimation device for casting crack, estimation program for casting crack, and memory medium with memorized estimation program for casting crack Download PDF

Info

Publication number
JP2016179495A
JP2016179495A JP2015062384A JP2015062384A JP2016179495A JP 2016179495 A JP2016179495 A JP 2016179495A JP 2015062384 A JP2015062384 A JP 2015062384A JP 2015062384 A JP2015062384 A JP 2015062384A JP 2016179495 A JP2016179495 A JP 2016179495A
Authority
JP
Japan
Prior art keywords
mold
casting
temperature
cast product
tensile strength
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2015062384A
Other languages
Japanese (ja)
Other versions
JP6346116B2 (en
Inventor
伸気 棚次
Nobuki Tanatsugu
伸気 棚次
匡 猪原
Tadashi Inohara
匡 猪原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JATCO Ltd
Original Assignee
JATCO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JATCO Ltd filed Critical JATCO Ltd
Priority to JP2015062384A priority Critical patent/JP6346116B2/en
Priority to CN201610150746.XA priority patent/CN106001489B/en
Publication of JP2016179495A publication Critical patent/JP2016179495A/en
Application granted granted Critical
Publication of JP6346116B2 publication Critical patent/JP6346116B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Forging (AREA)

Abstract

PROBLEM TO BE SOLVED: To estimate cracks generated in a casting upon mold release.SOLUTION: An estimation method for casting cracks, which is an estimation method for cracks of a casting W produced with a die cast metal mold 1 with a cavity C formed corresponding to the shape of the casting W, comprises: a metal mold temperature acquisition step for acquiring a temperature T1, which is the temperature of a region B corresponding to a predetermined part Wa of the casting W of the die cast metal mold 1, at a point of time from the completion of coating the die cast metal mold 1 before mold clamping with a mold release agent to the completion of ejection of molten metal M into the cavity C; a tensile strength acquisition step for acquiring the tensile strength F of a predetermined part Wa of the casting W at a point of time from the completion of ejection to the completion of taking the casting W out of the die cast metal mold 1; and a crack estimation step for estimating, from the acquired temperature T1 and the tensile strength F, whether cracks at the predetermined part Wa of the casting W are generated upon mold release or taking the casting W out of the die cast metal mold 1.SELECTED DRAWING: Figure 6

Description

本発明は、鋳造品の割れ推定方法、鋳造品の割れ推定装置、鋳造品の割れ推定プログラム、および鋳造品の割れ推定プログラムを記憶した記憶媒体に関する。   The present invention relates to a casting product crack estimation method, a cast product crack estimation device, a cast product crack estimation program, and a storage medium storing a cast product crack estimation program.

アルミニウムなどのダイカスト鋳造に用いられるダイカスト金型は、固定型と、この固定型に対して接離する可動型とを有しており、固定型と可動型の互いの型分割面を接合して型締めすると、製品（鋳造品）の形状に対応したキャビティが、固定型と可動型の間に形成されるようになっている。   A die casting mold used for die casting of aluminum or the like has a fixed mold and a movable mold that comes in contact with and separates from the fixed mold. The mold dividing surfaces of the fixed mold and the movable mold are joined to each other. When the mold is clamped, a cavity corresponding to the shape of the product (cast product) is formed between the fixed mold and the movable mold.

ダイカスト鋳造では、このキャビティ内に射出した溶湯を固化させたのち、可動型を固定型から引き離す方向に移動させる型開きを行うと、鋳造品が可動型と共に移動して、固定型から分離するようになっている。   In die casting, after the molten metal injected into the cavity is solidified and then the mold is opened to move the movable mold away from the fixed mold, the cast product moves with the movable mold and separates from the fixed mold. It has become.

特許文献１には、鋳造品におけるヒケ巣の発生部位をシミュレーションによって推定し、推定したヒケ巣の発生部位と、鋳造品の実際の表面形状を示すデータとに基づいて、ヒケ割れが生じる可能性の高い部位を推定する推定方法が開示されている。   In Patent Document 1, the occurrence site of a sink nest in a cast product is estimated by simulation, and the possibility of a sink crack occurs based on the estimated generation site of the sink nest and data indicating the actual surface shape of the cast product. An estimation method for estimating a region having a high height is disclosed.

特開２００９−１２５７９５号公報JP 2009-125895 A

しかし、特許文献１の方法では、型開き時または鋳造品の鋳造型からの取り出し時に発生する割れ（いわゆる、かじり割れ）については、推定できるようになっておらず、このようなかじり割れを推定できるようにすることが求められている。   However, in the method of Patent Document 1, it is not possible to estimate cracks (so-called galling cracks) that occur when the mold is opened or when a cast product is taken out from the casting mold, and such galling cracks are estimated. There is a need to be able to do that.

本発明は、
固定型と可動型の互いの型分割面を接合した型締め時に、鋳造品の形状に対応したキャビティが固定型と可動型の間に形成される鋳造金型で作製する鋳造品の割れ推定方法であって、
鋳造金型の鋳造品の所定部位に対応する領域の温度であって、型締め前の鋳造金型への離型剤の塗布が完了してからキャビティへの溶湯の射出が完了するまでの間の時点における温度を取得する金型温度取得ステップと、
射出が完了してから鋳造品の鋳造金型からの取り出しが完了するまでの間の時点おける鋳造品の所定部位の引っ張り強度を取得する引っ張り強度取得ステップと、
金型温度取得ステップで取得した温度と、引っ張り強度取得ステップで取得した引っ張り強度から、型開き時または鋳造品の鋳造金型からの取り出し時の鋳造品の所定部位での割れの発生の有無を推定する割れ推定ステップと、を有することを特徴とする鋳造品の割れ推定方法とした。 The present invention
A method for estimating cracks in a cast product produced by a casting mold in which a cavity corresponding to the shape of the cast product is formed between the fixed mold and the movable mold when clamping the mold-dividing surfaces of the fixed mold and the movable mold. Because
The temperature of the region corresponding to a predetermined part of the casting product of the casting mold, from the time when the application of the release agent to the casting mold before clamping is completed until the injection of the molten metal into the cavity is completed Mold temperature acquisition step for acquiring the temperature at the time of
A tensile strength acquisition step for acquiring a tensile strength of a predetermined portion of the cast product at a time point between completion of injection and removal of the cast product from the casting mold; and
Based on the temperature acquired in the mold temperature acquisition step and the tensile strength acquired in the tensile strength acquisition step, the presence or absence of occurrence of cracks at a predetermined part of the cast product when the mold is opened or when the cast product is taken out from the casting mold. And a crack estimation step for estimation.

かじり割れは、鋳造品の鋳造金型に溶着した部位が、型開き方向に引っ張られることにより発生する。
かじり割れは、溶着した部位の引っ張り強度が低いほど発生する傾向が高いので、型開き時または鋳造品の鋳造型からの取り出し時の鋳造品の所定部位の引っ張り強度を求めることで、割れの発生の有無を推定できる。
また、鋳造品のダイカスト金型への溶着は、鋳造金型に塗布した離型剤の働きが不十分である場合に起こり、金型の温度が高い箇所ほど、その箇所における離型剤の働きが悪くなる。
よって、鋳造品の所定部位の引っ張り強度と、金型の所定部位に対応する領域の温度の両方に基づいて、かじり割れ発生の有無を推定することができる。 The galling crack is generated when the portion welded to the casting mold of the cast product is pulled in the mold opening direction.
Scratch cracks are more likely to occur as the tensile strength of the welded part is lower, so cracks can be generated by determining the tensile strength of a predetermined part of the cast product when the mold is opened or when the cast product is removed from the casting mold. Can be estimated.
In addition, welding of a cast product to a die-casting die occurs when the release agent applied to the casting die is insufficient, and the higher the mold temperature, the more the release agent works at that location. Becomes worse.
Therefore, it is possible to estimate the occurrence of galling cracks based on both the tensile strength of the predetermined part of the cast product and the temperature of the region corresponding to the predetermined part of the mold.

ダイカスト鋳造に用いられるダイカスト金型を説明する図である。It is a figure explaining the die-casting die used for die-casting. ダイカスト鋳造の制御装置の構成を説明する図である。It is a figure explaining the structure of the control apparatus of die-casting. ダイカスト金型への溶湯の射出による鋳造品の作製を説明する図である。It is a figure explaining preparation of the cast product by injection of the molten metal to a die-casting metallic mold. ダイカスト金型の型開きを説明する図である。It is a figure explaining the mold opening of a die-cast metal mold | die. ダイカスト金型を用いたダイカスト鋳造の工程を説明する図である。It is a figure explaining the process of the die-casting using a die-casting metal mold | die. 鋳造シミュレーションのフローチャートである。It is a flowchart of casting simulation. 鋳造品の温度と引っ張り強度との関係を説明する図である。It is a figure explaining the relationship between the temperature and tensile strength of a casting.

以下、鋳造品の割れ推定方法の実施の形態を説明する。
図１は、アルミニウムなどを用いたダイカスト鋳造に用いられるダイカスト金型１を説明する図であって、固定型２と可動型３とを型締めした状態のダイカスト金型１を示す図であり、図２は、ダイカスト鋳造の制御装置１０の構成を説明する図である。
図３は、ダイカスト金型１を説明する図であって、キャビティＣに溶湯Ｍを射出して鋳造品Ｗを形成した状態を示す図であり、図４は、ダイカスト金型１を説明する図であって、固定型２と可動型３とを型開きした状態を示す図である。
図５は、ダイカスト金型１を用いてダイカスト鋳造を行う際の一連の工程を説明する図である。 Hereinafter, an embodiment of a crack estimation method for a cast product will be described.
FIG. 1 is a diagram for explaining a die-casting die 1 used for die-casting using aluminum or the like, and showing the die-casting die 1 in a state where a fixed die 2 and a movable die 3 are clamped, FIG. 2 is a diagram for explaining the configuration of the control device 10 for die casting.
FIG. 3 is a diagram illustrating the die-casting mold 1 and is a diagram illustrating a state in which the molten metal M is injected into the cavity C to form a cast product W. FIG. 4 is a diagram illustrating the die-casting mold 1. And it is a figure which shows the state which open | released the fixed mold | type 2 and the movable mold | type 3. FIG.
FIG. 5 is a diagram illustrating a series of steps when performing die casting using the die casting mold 1.

図１に示すように、ダイカスト鋳造に用いられるダイカスト金型１は、固定型２と、この固定型２に対向配置された可動型３とを有している。
可動型３は、可動型駆動装置１１（図２参照）が制御する駆動機構（図示せず）により進退移動して、当該可動型３の型分割面３１を、固定型２の型分割面２１に対して接離させるようになっており、固定型２と可動型３の互いの型分割面２１、３１を接合して型締めすると、製品（鋳造品Ｗ）の形状に対応したキャビティＣが、固定型２と可動型３の間に形成されるようになっている。 As shown in FIG. 1, a die casting mold 1 used for die casting includes a fixed mold 2 and a movable mold 3 disposed to face the fixed mold 2.
The movable mold 3 is moved forward and backward by a drive mechanism (not shown) controlled by the movable drive device 11 (see FIG. 2), and the mold dividing surface 31 of the movable mold 3 is moved to the mold dividing surface 21 of the fixed mold 2. When the mold dividing surfaces 21 and 31 of the fixed mold 2 and the movable mold 3 are joined and clamped, a cavity C corresponding to the shape of the product (cast product W) is formed. , Formed between the fixed mold 2 and the movable mold 3.

固定型２では、可動型３の移動方向（図中、左右方向）における可動型３とは反対側の面に、溶湯Ｍの射出口２２が開口しており、この射出口２２は、ゲート２３を介してキャビティＣに連通して形成されている。
射出口２２には、筒状の射出スリーブ４０の一端が接続されており、この射出スリーブ４０は、可動型３の移動方向に沿って、固定型２から離れる方向に直線状に延びている。 In the stationary mold 2, an injection port 22 for the molten metal M is opened on the surface opposite to the movable mold 3 in the moving direction of the movable mold 3 (left and right in the drawing). It is formed in communication with the cavity C via
One end of a cylindrical injection sleeve 40 is connected to the injection port 22, and the injection sleeve 40 extends linearly in a direction away from the fixed mold 2 along the moving direction of the movable mold 3.

射出スリーブ４０の他端側の外周には、溶湯Ｍの注入口４１が開口しており、この注入口４１よりも他端側（図１における右側）が、溶湯Ｍの押し出し部材４２の初期位置となっている（図１参照）。   An injection port 41 for the molten metal M is opened on the outer periphery on the other end side of the injection sleeve 40, and the other end side (the right side in FIG. 1) from the injection port 41 is the initial position of the extrusion member 42 for the molten metal M. (See FIG. 1).

押し出し部材４２は、射出スリーブ４０の内径と整合する外径を有しており、射出スリーブ４０の他端側から、射出スリーブ４０内に挿入されている。
押し出し部材４２は、射出制御装置１２（図２参照）が制御する駆動機構（図示せず）により、射出スリーブ４０の長手方向に進退移動するようになっており、実施の形態では、前記した初期位置（図１参照）と、射出口２２の近傍の駆動位置（図３参照）との間を、進退移動するようになっている。 The push-out member 42 has an outer diameter that matches the inner diameter of the injection sleeve 40, and is inserted into the injection sleeve 40 from the other end side of the injection sleeve 40.
The push-out member 42 is moved back and forth in the longitudinal direction of the injection sleeve 40 by a drive mechanism (not shown) controlled by the injection control device 12 (see FIG. 2). It moves forward and backward between a position (see FIG. 1) and a drive position (see FIG. 3) in the vicinity of the injection port 22.

射出スリーブ４０の注入口４１の上側には、溶湯注入装置５の注ぎ口５１が位置しており、注入制御装置１３（図２参照）が、注ぎ口５１に設けたバルブ（図示せず）を開くことで、注ぎ口５１と注入口４１とを介して、溶湯注入装置５から射出スリーブ４０内に溶湯Ｍが注湯されるようになっている。   The pouring spout 51 of the molten metal pouring device 5 is located above the pouring spout 41 of the injection sleeve 40, and the pouring control device 13 (see FIG. 2) has a valve (not shown) provided on the spout spout 51. By opening, the molten metal M is poured into the injection sleeve 40 from the molten metal pouring device 5 through the spout 51 and the pouring port 41.

ダイカスト金型１を用いてダイカスト鋳造を行う際の一連の工程を、図５を参照して説明する。
ダイカスト金型１を用いたダイカスト鋳造では、はじめに、可動型３と固定型２の型締め後にキャビティＣを形成する部分に、離型剤が散布（塗布）される（図５、離型剤塗布）。
続いて、固定型２と可動型３の互いの型分割面２１、３１を接合するダイカスト金型１の型締めが行われて、ダイカスト金型１内に鋳造品Ｗの形状に対応したキャビティＣが形成される（図５、型締め）。 A series of steps when performing die casting using the die casting mold 1 will be described with reference to FIG.
In die casting using the die casting mold 1, first, a release agent is sprayed (applied) to a portion where the cavity C is formed after the movable die 3 and the fixed die 2 are clamped (FIG. 5, release agent application). ).
Subsequently, the die casting mold 1 for joining the mold dividing surfaces 21 and 31 of the fixed mold 2 and the movable mold 3 is clamped, and the cavity C corresponding to the shape of the cast product W is formed in the die casting mold 1. Is formed (FIG. 5, mold clamping).

そして、押し出し部材４２を射出スリーブ４０内の初期位置に配置した状態で、溶湯注入装置５から射出スリーブ４０に溶湯Ｍが注がれる（図５、注湯）。
続いて、押し出し部材４２の初期位置から駆動位置までの移動により、ダイカスト金型１のキャビティＣ内に溶湯Ｍが射出されて（図５、射出）、キャビティＣ内に鋳造品Ｗの形状で溶湯が充填される。 And the molten metal M is poured into the injection sleeve 40 from the molten metal injection | pouring apparatus 5 in the state which has arrange | positioned the extrusion member 42 in the initial position in the injection sleeve 40 (FIG. 5, pouring).
Subsequently, by the movement of the pushing member 42 from the initial position to the driving position, the molten metal M is injected into the cavity C of the die casting mold 1 (injection in FIG. 5), and the molten metal in the shape of the cast product W is injected into the cavity C. Is filled.

キャビティＣ内への溶湯Ｍの射出から所定時間経過したのちに、可動型３を固定型２から離れる方向に移動させて、ダイカスト金型１の型開きが行われる（図５、型開き）。
この型開き時に、鋳造品Ｗが可動型３と一緒に移動して、固定型２から分離する。 After a predetermined time has elapsed from the injection of the molten metal M into the cavity C, the movable mold 3 is moved away from the fixed mold 2 and the die casting mold 1 is opened (FIG. 5, mold opening).
When the mold is opened, the casting W moves together with the movable mold 3 and is separated from the fixed mold 2.

続いて、可動型３からの鋳造品Ｗの取り出し（図３、製品取り出し）が行われる。
なお、図４に示すように、可動型３から取り出された鋳造品Ｗには、溶湯の射出口２２側や、射出時にキャビティＣ内の空気を吸引する真空ポンプＰ側に、鋳造後の後工程にて除去されるランナー部Ｗｘ、Ｗｘが接続している。 Subsequently, the cast product W is removed from the movable mold 3 (FIG. 3, product removal).
As shown in FIG. 4, the cast product W taken out from the movable mold 3 includes a molten metal injection port 22 side and a vacuum pump P side for sucking air in the cavity C at the time of injection after the casting. The runner parts Wx and Wx removed in the process are connected.

そして、鋳造品Ｗを取り外した可動型３と、固定型の型締め後にキャビティＣを形成する領域に、離型剤が、再び散布（塗布）されることになる（図５、離型剤塗布）。   Then, the mold release agent is again sprayed (applied) to the movable mold 3 from which the cast product W has been removed and the area where the cavity C is formed after the fixed mold is clamped (FIG. 5, application of the mold release agent). ).

そして、離型剤が散布された固定型２と可動型３とが互いに型締めされて、次のサイクルでの鋳造品Ｗの作製に、ダイカスト金型１が用いられることになる。
よって、鋳造品Ｗの作製時には、図５に示す各工程を順番に繰り返すことで、ひとつのダイカスト金型１から鋳造品Ｗが連続して作製されるようになっている。 Then, the fixed mold 2 and the movable mold 3 to which the release agent is sprayed are clamped to each other, and the die casting mold 1 is used for producing the cast product W in the next cycle.
Therefore, at the time of producing the cast product W, the casting product W is continuously produced from one die-casting die 1 by sequentially repeating the steps shown in FIG.

ここで、ダイカスト金型１を用いた鋳造品Ｗの作製が繰り返し実施されると、キャビティＣ内に射出される溶湯Ｍの温度が高いので、ダイカスト金型１（固定型２、可動型３）の温度が上昇する。
そのため、ダイカスト金型１の固定型２と可動型３内には、冷却水ＣＬを通流させる冷却路（図１、点線参照）が設けられており、ダイカスト金型１の温度が、鋳造に適した温度に保持されるようになっている。 Here, when the production of the casting W using the die casting mold 1 is repeatedly performed, the temperature of the molten metal M injected into the cavity C is high, so that the die casting mold 1 (fixed mold 2 and movable mold 3). Temperature rises.
Therefore, a cooling path (see the dotted line in FIG. 1) for allowing the cooling water CL to flow is provided in the fixed mold 2 and the movable mold 3 of the die casting mold 1 so that the temperature of the die casting mold 1 can be reduced. It is designed to be kept at a suitable temperature.

以下、設計者等が鋳造金型の冷却条件等を設計する際におこなう鋳造シミュレーションを説明する。
図６は、鋳造シミュレーションのフローチャートである。 Hereinafter, a casting simulation performed when a designer or the like designs cooling conditions for a casting mold will be described.
FIG. 6 is a flowchart of the casting simulation.

鋳造シミュレーションでは、はじめに、ステップ１０１において、金型温度解析と、溶湯流れ解析と、凝固解析とが実施される。   In the casting simulation, first, in step 101, a mold temperature analysis, a melt flow analysis, and a solidification analysis are performed.

冷却水量などの鋳造条件、ダイカスト金型１のモデル、鋳造品Ｗのモデル、ランナーＷｘのモデルに基づいて、金型温度解析ではダイカスト金型１の温度を解析し、溶湯流れ解析ではキャビティＣに溶湯が充填される過程を解析し、凝固解析では射出された溶湯が固化する（凝固する）過程を解析する。   Based on the casting conditions such as the amount of cooling water, the model of the die casting mold 1, the model of the casting W, and the model of the runner Wx, the temperature of the die casting mold 1 is analyzed in the mold temperature analysis, and the cavity C is analyzed in the molten metal flow analysis. The process of filling the molten metal is analyzed. In the solidification analysis, the process of solidifying (solidifying) the injected molten metal is analyzed.

続くステップ１０２において、キャビティＣ内での溶湯Ｍの固化により作製される鋳造品Ｗの評価部位（所定部位）についてのデータを抽出する。   In subsequent step 102, data on the evaluation part (predetermined part) of the cast product W produced by solidification of the molten metal M in the cavity C is extracted.

本願発明者は、
鋳造品Ｗにおけるダイカスト金型１との境界面が、型開き方向に沿う向きとなる部位であって、溶湯Ｍのゲート２３の近傍に位置する部位（図３、符号Ｗａ参照）に、型開きまたは鋳造品Ｗの鋳造型（ダイカスト金型１）からの取り出しに起因する割れが発生する傾向があることに着目し、
型開き時または鋳造品Ｗの鋳造型からの取り出し時に鋳造品Ｗにかじり割れが発生する主原因が、鋳造品Ｗのダイカスト金型１に溶着した部位が、型開き方向に引っ張られることによるものであることを見い出した。
そして、
（１）鋳造品Ｗのダイカスト金型１への溶着は、固定型２と可動型３の互いの型分割面におけるキャビティＣを形成する領域に塗布した離型剤の働きが不十分である場合に起こり、この離型剤の働きは、金型温度が高くなる程悪くなるので、溶湯を射出する直前の金型温度から、離型剤の働き具合（溶着する可能性）を推定できること、
（２）かじり割れは、溶着した部位の引っ張り強度が低いほど発生する傾向が高いので、鋳造品Ｗの所定部位Ｗａの型開き時または鋳造品Ｗの鋳造型からの取り出し時の温度を推定し、この推定した温度から、鋳造品Ｗの所定部位Ｗａの型開き時または鋳造品Ｗの鋳造型からの取り出し時の引っ張り強度が推定できることから、
実施の形態では、溶湯Ｍを射出する直前の固定型２の温度であって、鋳造品Ｗの所定部位Ｗａに対応する領域Ｂの温度Ｔ１と、鋳造品Ｗの所定部位Ｗａの型開き時の引っ張り強度Ｆと、に基づいて、型開き時における鋳造品Ｗの所定部位Ｗａでの割れの発生の有無を推定している（ステップ１０３、１０４）。 The inventor of the present application
In the cast product W, the boundary surface with the die-casting mold 1 is a part along the mold opening direction, and the mold opening is performed at a part (see reference numeral Wa in FIG. 3) located in the vicinity of the gate 23 of the molten metal M. Alternatively, paying attention to the tendency of cracking due to removal from the casting mold (die casting mold 1) of the casting W,
The main cause of galling cracks in the casting W when the mold is opened or when the casting W is taken out from the casting mold is that the portion welded to the die casting mold 1 of the casting W is pulled in the mold opening direction. I found out.
And
(1) When the cast product W is welded to the die-casting mold 1, the function of the release agent applied to the area where the cavity C is formed in the mold dividing surface of the fixed mold 2 and the movable mold 3 is insufficient. Since the function of the mold release agent becomes worse as the mold temperature becomes higher, the function of the mold release agent (possibility of welding) can be estimated from the mold temperature immediately before injecting the molten metal.
(2) Scratch cracks are more likely to occur as the tensile strength of the welded part is lower. Therefore, the temperature at the time of opening the predetermined part Wa of the cast product W or taking out the cast product W from the casting mold is estimated. From this estimated temperature, it is possible to estimate the tensile strength at the time of mold opening of the predetermined portion Wa of the cast product W or when the cast product W is taken out from the casting mold,
In the embodiment, the temperature of the fixed mold 2 immediately before injecting the molten metal M, the temperature T1 of the region B corresponding to the predetermined portion Wa of the cast product W, and the mold opening of the predetermined portion Wa of the cast product W. Based on the tensile strength F, the presence / absence of occurrence of cracks in the predetermined portion Wa of the cast product W at the time of mold opening is estimated (steps 103 and 104).

また、ステップ１０３では、型開き時の鋳造品Ｗの引っ張り強度Ｆを、型開き時の鋳造品Ｗの所定部位Ｗａの温度Ｔ２に基づいて、相関マップ（図７参照）から求めている。   In step 103, the tensile strength F of the casting W when the mold is opened is obtained from the correlation map (see FIG. 7) based on the temperature T2 of the predetermined portion Wa of the casting W when the mold is opened.

図７に示すように、相関マップでは、鋳造品Ｗの温度Ｔ２と、鋳造品Ｗの引っ張り強度Ｆとの対応関係が規定されており、推定された型開き時の鋳造品Ｗの所定部位Ｗａの温度に基づいて、相関マップを参照することで、型開き時の鋳造品Ｗの所定部位Ｗａの引っ張り強度が求められるようになっている。   As shown in FIG. 7, in the correlation map, the correspondence between the temperature T2 of the cast product W and the tensile strength F of the cast product W is defined, and the predetermined portion Wa of the cast product W when the mold is opened is estimated. Based on this temperature, the tensile strength of the predetermined portion Wa of the cast product W at the time of mold opening is obtained by referring to the correlation map.

実施の形態では、実験などに基づいて、鋳造品Ｗの所定部位Ｗａの温度Ｔ２と引っ張り強度Ｆとの相関関係が規定する相関マップが作成されている。   In the embodiment, a correlation map that defines the correlation between the temperature T2 of the predetermined portion Wa of the cast product W and the tensile strength F is created based on experiments and the like.

そのため、前記したステップ１０３において、鋳造品Ｗの鋳造に用いられる溶湯に応じて決まる１つの相関マップを選択し、選択した相関マップを用いて、推定した鋳造品Ｗの所定部位Ｗａの温度Ｔ２から、鋳造品Ｗの所定部位Ｗａの引っ張り強度Ｆを求めている。   Therefore, in the above-described step 103, one correlation map determined in accordance with the molten metal used for casting the cast product W is selected, and the estimated temperature T2 of the predetermined portion Wa of the cast product W is selected using the selected correlation map. The tensile strength F of the predetermined part Wa of the cast product W is obtained.

そして、鋳造シミュレーションにおいて、下記の要件（ａ）、（ｂ）の両方が満たされた場合に、型開き時に鋳造品Ｗの所定部位Ｗａに割れが発生しない、すなわち冷却等の変更は必要ないと判定し、（ａ）、（ｂ）の要件のうちの少なくとも一方の要件が満たされない場合には、割れが発生する、すなわち、冷却等の変更が必要と判定する。
（ａ）鋳造品Ｗの所定部位Ｗａの引っ張り強度Ｆが、閾値強度Ｆ＿ｔｈ以上である（ステップ１０３）。
（ｂ）溶湯Ｍの射出前におけるダイカスト金型１（固定型２）の領域Ｂの温度Ｔ１が、閾値温度Ｔ＿ｔｈ以下である（ステップ１０４）。 In the casting simulation, when both of the following requirements (a) and (b) are satisfied, the predetermined portion Wa of the cast product W does not crack when the mold is opened, that is, it is not necessary to change the cooling or the like. If it is determined and at least one of the requirements (a) and (b) is not satisfied, it is determined that cracking occurs, that is, a change such as cooling is necessary.
(A) The tensile strength F of the predetermined portion Wa of the cast product W is not less than the threshold strength F_th (step 103).
(B) The temperature T1 of the region B of the die casting mold 1 (fixed mold 2) before the injection of the molten metal M is equal to or lower than the threshold temperature T_th (step 104).

割れが発生しないと判定された場合（ステップ１０３およびステップ１０４がともにＹとなる場合）には、割れの発生を阻止する必要がないので、ダイカスト金型１（固定型２、可動型３）の冷却温度などを変更する必要もない。
よって、かかる場合には、鋳造シミュレーションによる割れの推定は終了することになる。 When it is determined that no cracks occur (when both step 103 and step 104 are Y), it is not necessary to prevent the cracks from occurring, so that the die casting mold 1 (fixed mold 2, movable mold 3) There is no need to change the cooling temperature.
Therefore, in such a case, the estimation of cracks by the casting simulation ends.

一方、割れが発生すると判定された場合（ステップ１０３およびステップ１０４のいずれかがＮとなる場合）には、割れの発生を阻止するためにダイカスト金型１（固定型２、可動型３）の冷却温度などを変更する必要がある。
かかる場合には、上記した要件（ａ）、（ｂ）のうちの何れの要件が満たされていないのかを確認したうえで、満たされていない要件を満たすようにするために必要な条件（冷却条件など）を変更する（ステップ１０５）。 On the other hand, if it is determined that a crack will occur (if either step 103 or step 104 is N), the die casting mold 1 (fixed mold 2, movable mold 3) is used to prevent the crack from occurring. It is necessary to change the cooling temperature.
In such a case, after confirming which of the above requirements (a) and (b) is not satisfied, the conditions (cooling) necessary to satisfy the requirements that are not satisfied The conditions are changed (step 105).

以上の通り、実施の形態では
固定型２と可動型３の互いの型分割面２１、３１を接合した型締め時に、鋳造品Ｗの形状に対応したキャビティＣが固定型２と可動型３の間に形成されるダイカスト金型１（鋳造金型）で作製する鋳造品Ｗの割れ推定方法であって、
ダイカスト金型１の鋳造品Ｗの所定部位Ｗａに対応する領域Ｂの温度であって、型締め前のダイカスト金型１への離型剤の塗布が完了してからキャビティＣへの溶湯Ｍの射出が完了するまでの間の時点における温度Ｔ１を取得する金型温度取得ステップと、
射出が完了してから鋳造品Ｗのダイカスト金型１からの取り出しが完了するまでの間の時点おける鋳造品Ｗの所定部位Ｗａの引っ張り強度Ｆを取得する引っ張り強度取得ステップと、
金型温度取得ステップで取得した温度Ｔ１と、引っ張り強度取得ステップで取得した引っ張り強度Ｆから、型開き時または鋳造品Ｗのダイカスト金型１（可動型３）からの取り出し時の鋳造品Ｗの所定部位Ｗａでの割れの発生の有無を推定する割れ推定ステップと、を有することを特徴とする鋳造品の割れ推定方法とした。 As described above, in the embodiment, the cavity C corresponding to the shape of the casting W is formed between the fixed mold 2 and the movable mold 3 at the time of mold clamping by joining the mold dividing surfaces 21 and 31 of the fixed mold 2 and the movable mold 3 to each other. A method for estimating cracks in a cast product W produced with a die-casting die 1 (casting die) formed therebetween,
The temperature of the region B corresponding to the predetermined portion Wa of the cast product W of the die-casting die 1 and the application of the release agent to the die-casting die 1 before clamping is completed. A mold temperature acquisition step of acquiring a temperature T1 at a point in time until the injection is completed;
A tensile strength acquisition step of acquiring a tensile strength F of a predetermined portion Wa of the cast product W at a time from when the injection is completed to when the casting product W is taken out from the die casting mold 1;
From the temperature T1 acquired in the mold temperature acquisition step and the tensile strength F acquired in the tensile strength acquisition step, the casting product W at the time of mold opening or when the cast product W is taken out from the die casting mold 1 (movable mold 3). A crack estimation step for estimating the presence or absence of cracks occurring at the predetermined portion Wa.

かじり割れは、鋳造品Ｗのダイカスト金型１に溶着した部位が、型開き方向に引っ張られることにより発生する。
かじり割れは、鋳造品Ｗの固定型２に溶着した部位の引っ張り強度Ｆが低いほど発生する傾向が高いので、型開き時または鋳造品Ｗのダイカスト金型１からの取り出し時の鋳造品Ｗの引っ張り強度Ｆを求めることで、割れの発生の有無を推定できる。
このとき、射出が完了するまでは、鋳造品Ｗの所定部位の引っ張り強度を精度よく推定することは困難であるため、射出が完了した以降の鋳造品Ｗの引っ張り強度を推定する。かつ、かじり割れが発生するのは型開き時または製品取り出し時であるため、鋳造品Ｗをダイカスト金型１から取り出しが完了するまでの鋳造品Ｗの引っ張り強度を推定する。
また、鋳造品Ｗのダイカスト金型１への溶着は、ダイカスト金型１に塗布した離型剤の働きが不十分である場合に起こり、金型温度が高い箇所ほど、その箇所における離型剤の働きが悪くなる。この離型剤の働きは金型温度が高くなるほど悪くなるので、キャビティＣに溶湯を射出する際の金型温度であって、鋳造品Ｗの所定部位Ｗａに対応する領域Ｂの温度から、鋳造品Ｗの所定部位Ｗａのダイカスト金型１への溶着の程度が予測できる。
なお、離型剤を塗布するとダイカスト金型１の温度が低下するため、離型剤の塗布が完了した以降のダイカスト金型１（固定型２）の温度を推定する。かつ、溶湯を射出する際のダイカスト金型１（固定型２）の温度が離型剤の働き、すなわち溶着に大きく関与するため、射出が完了するまでのダイカスト金型１の温度を推定する。
上記のように、ダイカスト金型１の所定部位Ｗａに対応する領域Ｂの温度であって、型締め前の鋳造金型への離型剤の塗布が完了してからキャビティへの溶湯の射出が完了するまでの間の時点における温度Ｔ１と、射出が完了してから鋳造品Ｗのダイカスト金型１からの取り出しが完了するまでの間の時点における鋳造品Ｗの所定部位の引っ張り強度Ｆの両方に基づいて、型開き時の割れ発生の有無を推定することで、何れか一方に基づいて推定する場合よりも正確に、型開き時の割れ発生の有無を推定できる。 The galling crack is generated when the portion welded to the die casting mold 1 of the cast product W is pulled in the mold opening direction.
Scratch cracks are more likely to occur as the tensile strength F of the portion welded to the fixed mold 2 of the cast product W is lower. Therefore, the galling crack of the cast product W at the time of mold opening or when the cast product W is taken out from the die casting mold 1 By determining the tensile strength F, it is possible to estimate the presence or absence of cracks.
At this time, it is difficult to accurately estimate the tensile strength of a predetermined portion of the cast product W until the injection is completed. Therefore, the tensile strength of the cast product W after the injection is completed is estimated. In addition, since the galling is generated when the mold is opened or the product is taken out, the tensile strength of the cast product W until the casting product W is completely taken out from the die casting mold 1 is estimated.
Further, the casting W is welded to the die casting mold 1 when the function of the release agent applied to the die casting mold 1 is insufficient. The higher the mold temperature, the higher the mold release agent at that location. Work worse. Since the function of the mold release agent becomes worse as the mold temperature becomes higher, the mold temperature when the molten metal is injected into the cavity C, which is the temperature of the region B corresponding to the predetermined portion Wa of the cast product W, is determined. The degree of welding of the predetermined portion Wa of the product W to the die casting mold 1 can be predicted.
In addition, since the temperature of the die-casting die 1 will fall if a release agent is apply | coated, the temperature of the die-casting die 1 (fixed die | dye 2) after the application | coating of a release agent is completed is estimated. And since the temperature of the die-casting die 1 (fixed die 2) at the time of injecting the molten metal is largely involved in the function of the release agent, that is, welding, the temperature of the die-casting die 1 until the injection is completed is estimated.
As described above, the temperature of the region B corresponding to the predetermined portion Wa of the die-casting mold 1, and after the application of the release agent to the casting mold before clamping is completed, the molten metal is injected into the cavity. Both the temperature T1 at the time until completion and the tensile strength F of the predetermined part of the casting W at the time between the completion of injection and the removal of the casting W from the die casting mold 1 are both Based on the above, it is possible to estimate the presence / absence of cracks at the time of mold opening more accurately than by estimating the presence / absence of cracks at the time of mold opening.

（２）射出が完了してから鋳造品Ｗのダイカスト金型１からの取り出しが完了するまでの間の時点の鋳造品Ｗの所定部位Ｗａの温度Ｔ２を推定する温度推定ステップをさらに備え、
引っ張り強度取得ステップでは、温度推定ステップで推定した鋳造品Ｗの所定部位Ｗａの温度に基づいて、鋳造品Ｗの所定部位Ｗａの引っ張り強度Ｆを求める構成とした。 (2) further comprising a temperature estimation step for estimating a temperature T2 of the predetermined portion Wa of the cast product W from when the injection is completed to when the cast product W is taken out from the die casting mold 1;
In the tensile strength acquisition step, the tensile strength F of the predetermined portion Wa of the cast product W is obtained based on the temperature of the predetermined portion Wa of the cast product W estimated in the temperature estimation step.

射出が完了してから鋳造品Ｗのダイカスト金型１からの取り出しが完了するまでの間の時点おける鋳造品Ｗの所定部位Ｗａの引っ張り強度Ｆは、射出が完了してから鋳造品Ｗのダイカスト金型１からの取り出しが完了するまでの間の時点の鋳造品Ｗの所定部位Ｗａの温度Ｔ２に応じて変化するので、実験に基づいて、鋳造品Ｗの所定部位Ｗａの温度Ｔ２と引っ張り強度Ｆとの相関関係を規定する相関マップを用意しておくことで、温度推定ステップで推定した鋳造品Ｗの所定部位Ｗａの温度Ｔ２から、鋳造品Ｗの所定部位Ｗａの引っ張り強度Ｆを容易に求めることができる。   The tensile strength F of the predetermined portion Wa of the cast product W after the injection is completed until the casting product W is completely taken out from the die casting mold 1 is determined by the die casting of the cast product W after the injection is completed. Since it changes according to the temperature T2 of the predetermined part Wa of the cast product W at the time until the removal from the mold 1 is completed, the temperature T2 and the tensile strength of the predetermined part Wa of the cast product W are determined based on experiments. By preparing a correlation map that defines the correlation with F, the tensile strength F of the predetermined portion Wa of the cast product W can be easily determined from the temperature T2 of the predetermined portion Wa of the cast product W estimated in the temperature estimation step. Can be sought.

（３）鋳造品Ｗにおける所定部位Ｗａは、可動型３と固定型２の互いの対向面が、型開き時に可動型３の移動方向で相対移動する領域Ａ、Ｂの間の空間Ｒ（図１参照）に形成される部位（所定部位Ｗａ）である構成とした。 (3) The predetermined portion Wa in the cast product W is a space R between the regions A and B in which the opposed surfaces of the movable mold 3 and the fixed mold 2 move relative to each other in the moving direction of the movable mold 3 when the mold is opened (see FIG. 1), the portion is a portion (predetermined portion Wa) formed.

かかる所定部位Ｗａでは、固定型２との境界面が、型開き時の可動型３の移動方向に沿う向きで位置しており、所定部位Ｗａが固定型２に溶着している場合には、溶着している範囲（面積）が大きくなるほど、型開き時に作用する応力が大きくなって、割れが発生しやすくなる。
よって、型開き時に割れが発生しやすい部位（所定部位Ｗａ）の型開き時の引っ張り強度Ｆを求めることで、型開き時の割れの発生の有無をより正確に推定できる。 In such a predetermined portion Wa, the boundary surface with the fixed mold 2 is positioned in a direction along the moving direction of the movable mold 3 when the mold is opened, and when the predetermined portion Wa is welded to the fixed mold 2, As the welded range (area) increases, the stress acting at the time of mold opening increases and cracks are likely to occur.
Therefore, the presence or absence of the crack at the time of mold opening can be estimated more correctly by calculating | requiring the tensile strength F at the time of mold opening of the site | part (predetermined part Wa) where a crack is easy to generate | occur | produce at the time of mold opening.

（４）所定部位Ｗａは、溶湯をキャビティＣに導入するダイカスト金型１のゲート２３に隣接する部位であって、抜き勾配が一定である部位である構成とした。 (4) The predetermined portion Wa is a portion adjacent to the gate 23 of the die casting mold 1 for introducing the molten metal into the cavity C and having a constant draft angle.

鋳造品Ｗの形状によっては、可動型３と固定型２の互いの対向面が型開き時に可動型３の移動方向で相対移動する領域Ａ、Ｂが複数存在するので、型開き時に割れが発生しやすい所定部位となり得る空間が、キャビティＣ内に複数存在する場合がある（図１における空間Ｒ、Ｒ１）。
この場合、型開き時に割れが発生しやすい所定部位を形成し得る空間Ｒ、Ｒ１のうち、ゲート２３に隣接する、すなわち、最もゲート２３の近傍に位置する空間Ｒでは、キャビティＣ内に溶湯Ｍを射出するときの圧力により、塗布された離型剤が流れてしまうことがあり、他の所定部位を形成し得る空間Ｒ１よりも、最もゲート２３の近傍に位置する空間Ｒに形成される部位のほうが、型開き時に割れが発生し易い傾向がある。
また、例えば、鋳造品Ｗの部位Ｗｂのように抜き勾配が増加すると型開き時に割れが発生しにくい傾向があるため、かじり割れの発生の有無を推定する所定部位を、抜き勾配が一定である部位Ｗａとした。
よって、型開き時に最も割れが発生しやすい部位に着目して、型開き時の割れの有無を推定することで、推定に要する時間を抑制しながら、精度よく推定をおこなうことができる。 Depending on the shape of the casting W, there are a plurality of areas A and B in which the opposed surfaces of the movable mold 3 and the fixed mold 2 move relative to each other in the moving direction of the movable mold 3 when the mold is opened, so that cracks occur when the mold is opened. There may be a plurality of spaces in the cavity C that can be predetermined portions that are likely to be formed (spaces R and R1 in FIG. 1).
In this case, among the spaces R and R1 that can form a predetermined portion where cracks are likely to occur when the mold is opened, in the space R adjacent to the gate 23, that is, closest to the gate 23, the molten metal M is contained in the cavity C. The applied mold release agent may flow due to the pressure when injecting the liquid, and the part formed in the space R closest to the gate 23 rather than the space R1 that can form another predetermined part This tends to cause cracks when the mold is opened.
Further, for example, if the draft increases like the part Wb of the cast product W, there is a tendency that cracks do not easily occur when the mold is opened. Therefore, the draft is constant for a predetermined part for estimating the occurrence of galling. It was set as the site | part Wa.
Therefore, by paying attention to the portion where cracks are most likely to occur when the mold is opened, it is possible to estimate accurately while suppressing the time required for estimation by estimating the presence or absence of cracks when the mold is opened.

（５）割れ推定ステップでは、
引っ張り強度Ｆが閾値強度Ｆ＿ｔｈ以上であり、かつダイカスト金型１の鋳造品Ｗの所定部位Ｗａに対応する領域Ｂの温度であって、型締め前のダイカスト金型１への離型剤の塗布が完了してからキャビティＣへの溶湯Ｍの射出が完了するまでの間の時点における温度Ｔ１が、閾値温度Ｒ＿ｔｈ以下である場合に、割れが発生しないと推定し、
引っ張り強度Ｆが閾値強度Ｆ＿ｔｈよりも低い、またはダイカスト金型１の鋳造品Ｗの所定部位Ｗａに対応する領域Ｂの温度であって、型締め前のダイカスト金型１への離型剤の塗布が完了してからキャビティＣへの溶湯Ｍの射出が完了するまでの間の時点における温度Ｔ１が前記閾値温度Ｔ＿ｔｈよりも大きい場合に割れが発生すると推定する構成とした。 (5) In the crack estimation step,
The tensile strength F is equal to or higher than the threshold strength F_th, and the temperature of the region B corresponding to the predetermined portion Wa of the casting W of the die casting mold 1 is applied to the die casting mold 1 before clamping. When the temperature T1 at the time from the completion of the injection to the completion of the injection of the molten metal M into the cavity C is equal to or lower than the threshold temperature R_th, it is estimated that no cracking occurs.
The tensile strength F is lower than the threshold strength F_th, or the temperature in the region B corresponding to the predetermined portion Wa of the cast product W of the die casting mold 1 and the mold release agent is applied to the die casting mold 1 before clamping In this configuration, it is estimated that cracking occurs when the temperature T1 at the time from the completion of the injection to the completion of the injection of the molten metal M into the cavity C is higher than the threshold temperature T_th.

このように構成すると、閾値温度Ｔ＿ｔｈ、閾値強度Ｆ＿ｔｈを、実験等の結果に基づいて設定することで、型開き時の割れの発生の有無をより正確に推定できる。   If comprised in this way, the threshold temperature T_th and the threshold intensity | strength F_th are set based on the result of experiment etc., and the presence or absence of the generation | occurrence | production of the crack at the time of mold opening can be estimated more correctly.

（６）金型温度取得ステップでは、溶湯Ｍを射出する前のダイカスト金型１の温度を取得する構成とした。 (6) In the mold temperature acquisition step, the temperature of the die casting mold 1 before injecting the molten metal M is acquired.

射出中のダイカスト金型１の温度を精度よく推定することは困難であるが、射出前のダイカスト金型１の温度に基づいて割れを推定することで、型開き時の割れの発生の有無をより正確に推定できる。   Although it is difficult to accurately estimate the temperature of the die casting mold 1 during injection, it is possible to determine whether or not cracking occurs when the mold is opened by estimating cracks based on the temperature of the die casting mold 1 before injection. It can be estimated more accurately.

（７）引っ張り強度取得ステップでは、型開き時の引っ張り強度Ｆを取得する構成とした。 (7) In the tensile strength acquisition step, the tensile strength F at the time of mold opening is acquired.

鋳造品Ｗの固定型２に溶着した部位が、型開き時に、型開き方向に引っ張られることにより鋳造品Ｗに割れが発生するため、型開き時の引っ張り強度Ｆに基づいて割れを推定することで、型開き時に発生するかじり割れの発生の有無をより正確に推定できる。   Since the portion welded to the fixed mold 2 of the cast product W is pulled in the mold opening direction when the mold is opened, the cast product W is cracked. Therefore, the crack is estimated based on the tensile strength F when the mold is opened. Thus, it is possible to more accurately estimate the presence or absence of galling that occurs during mold opening.

以上、上記の説明では、固定型２と鋳造品Ｗとが溶着し型開き時に生じるかじり割れを推定する場合を例示して説明したが、本発明の適用例の一つを示したものであり、例えば、可動型１と鋳造品Ｗとが溶着し鋳造品Ｗの取り出し時に生じるかじり割れを領域Ａの温度と鋳造品Ｗの取り出し時の引っ張り強度とに基づいて推定するものであってもよく、本発明の技術的範囲を上記実施形態の具体的構成に限定する趣旨ではない。   In the above description, the case where the fixed mold 2 and the cast product W are welded and the galling crack generated when the mold is opened is described as an example, but one example of application of the present invention is shown. For example, the galling crack generated when the movable mold 1 and the cast product W are welded and the cast product W is taken out may be estimated based on the temperature of the region A and the tensile strength when the cast product W is taken out. The technical scope of the present invention is not intended to be limited to the specific configuration of the above embodiment.

（８）引っ張り強度取得ステップでは、鋳造品Ｗのダイカスト金型１からの取り出し時の引っ張り強度Ｆを取得する構成とした。 (8) In the tensile strength acquisition step, the tensile strength F when the cast product W is taken out from the die casting mold 1 is acquired.

鋳造品Ｗのダイカスト金型１に溶着した部位が、ダイカスト金型１からの鋳造品Ｗの取り出し時に、型開き方向に引っ張られることにより鋳造品Ｗに割れが発生するため、鋳造品Ｗの鋳造金型からの取り出し時の引っ張り強度に基づいて割れを推定することで、鋳造品Ｗの鋳造型からの取り出し時に発生するかじり割れの発生の有無をより正確に推定できる。   Since the portion welded to the die casting die 1 of the casting W is pulled in the mold opening direction when the casting W is taken out from the die casting die 1, the casting W is cracked. By estimating the crack based on the tensile strength at the time of taking out from the mold, it is possible to more accurately estimate the occurrence of a galling crack that occurs when the cast product W is taken out from the casting mold.

実施の形態では、本願発明を、鋳造品Ｗの割れ推定方法として説明したが、本願発明は、上記した鋳造品Ｗの割れ推定方法を、コンピュータに実行させるための、鋳造品Ｗの割れ推定プログラムとしても実現可能である。   In the embodiments, the present invention has been described as a method for estimating cracks in a cast product W. However, the present invention provides a program for estimating cracks in a cast product W for causing a computer to execute the above-described method for estimating cracks in a cast product W. Can also be realized.

この場合、鋳造品Ｗの割れ推定プログラムは、コンピュータで読み取り可能な記憶媒体に記憶させた状態にて提供でき、プログラムを記憶可能な媒体であれば、磁気記憶媒体、光記憶媒体等の種々の情報記憶媒体が利用可能である。   In this case, the crack estimation program for the casting W can be provided in a state of being stored in a computer-readable storage medium, and various programs such as a magnetic storage medium and an optical storage medium can be used as long as the program can be stored. Information storage media are available.

さらに、本願発明は、上記した推定方法を実行するように構成されたコンピュータを有する鋳造品の割れ推定装置としても、実現可能である。   Furthermore, the present invention can be realized as a crack estimation apparatus for a cast product having a computer configured to execute the above estimation method.

１ ダイカスト金型
２ 固定型
３ 可動型
５ 溶湯注入装置
１０ 制御装置
１１ 可動型駆動装置
１２ 射出制御装置
１３ 注入制御装置
１４ 冷却水制御装置
１５ 温度センサ
２１ 型分割面
２２ 射出口
３２ 型分割面
４０ 射出スリーブ
４１ 注入口
４２ 押し出し部材
５１ 口
Ａ 領域
Ａ 所定領域
Ｃ キャビティ
ＣＬ 冷却水
Ｆ 引っ張り強度
Ｆ＿ｔｈ 閾値強度
Ｍ 溶湯
Ｔ＿ｔｈ 閾値温度
Ｔａ 所定部位
Ｗ 鋳造品
Ｗａ 所定部位 DESCRIPTION OF SYMBOLS 1 Die-cast metal mold | die 2 Fixed mold | type 3 Movable type | mold 5 Molten metal injection | pouring apparatus 10 Control apparatus 11 Movable type drive apparatus 12 Injection control apparatus 13 Injection control apparatus 14 Cooling water control apparatus 15 Temperature sensor 21 Mold division surface 22 Injection port 32 Mold division surface 40 Injection sleeve 41 Injection port 42 Extruding member 51 Port A area A Predetermined area C Cavity CL Cooling water F Tensile strength F_th Threshold strength M Molten metal T_th Threshold temperature Ta Predetermined part W Cast part Wa Predetermined part

Claims (11)

固定型と可動型の互いの型分割面を接合した型締め時に、鋳造品の形状に対応したキャビティが前記固定型と前記可動型の間に形成される鋳造金型で作製する鋳造品の割れ推定方法であって、
前記鋳造金型の前記鋳造品の所定部位に対応する領域の温度であって、前記型締め前の前記鋳造金型への離型剤の塗布が完了してから前記キャビティへの溶湯の射出が完了するまでの間の時点における温度を取得する金型温度取得ステップと、
前記射出が完了してから前記鋳造品の前記鋳造金型からの取り出しが完了するまでの間の時点おける前記鋳造品の前記所定部位の引っ張り強度を取得する引っ張り強度取得ステップと、
前記金型温度取得ステップで取得した温度と、前記引っ張り強度取得ステップで取得した引っ張り強度から、型開き時または前記鋳造品の前記鋳造金型からの取り出し時の前記鋳造品の前記所定部位での割れの発生の有無を推定する割れ推定ステップと、を有することを特徴とする鋳造品の割れ推定方法。 Cracking of a cast product produced by a casting mold in which a cavity corresponding to the shape of the cast product is formed between the fixed mold and the movable mold when the mold split surfaces of the fixed mold and the movable mold are joined to each other. An estimation method,
The temperature of a region corresponding to a predetermined portion of the cast product of the casting mold, and injection of the molten metal into the cavity after the application of the release agent to the casting mold before the mold clamping is completed. A mold temperature acquisition step for acquiring a temperature at a point in time until completion;
A tensile strength acquisition step of acquiring a tensile strength of the predetermined part of the cast product at a time between the completion of the injection and the removal of the cast product from the casting mold;
From the temperature acquired in the mold temperature acquisition step and the tensile strength acquired in the tensile strength acquisition step, at the predetermined portion of the casting product when the mold is opened or when the casting product is taken out from the casting mold A crack estimation step for estimating the presence or absence of the occurrence of cracks. 前記射出が完了してから前記鋳造品の前記鋳造金型からの取り出しが完了するまでの間の時点の前記鋳造品の前記所定部位の温度を推定する温度推定ステップをさらに備え、
前記引っ張り強度取得ステップでは、前記温度推定ステップで推定した前記鋳造品の前記所定部位の温度に基づいて、前記鋳造品の前記所定部位の引っ張り強度を求めることを特徴とする請求項１に記載の鋳造品の割れ推定方法。 A temperature estimation step of estimating a temperature of the predetermined part of the cast product at a time between the completion of the injection and the removal of the cast product from the casting mold;
2. The tensile strength of the predetermined part of the cast product is obtained based on the temperature of the predetermined part of the cast product estimated in the temperature estimation step in the tensile strength acquisition step. Casting crack estimation method. 前記鋳造品の前記所定部位は、可動型と固定型の互いの対向面が、型開き時に可動型の移動方向で相対移動する領域の間に位置する部位であることを特徴とする請求項１または請求項２に記載の鋳造品の割れ推定方法。   2. The predetermined portion of the cast product is a portion in which the opposed surfaces of the movable mold and the fixed mold are located between regions where the movable mold and the fixed mold move relative to each other in the moving direction of the movable mold. Or the crack estimation method of the casting of Claim 2. 前記所定部位は、溶湯を前記キャビティに導入する前記鋳造金型のゲートに隣接する部位であって、抜き勾配が一定である部位であることを特徴とする請求項３に記載の鋳造品の割れ推定方法。   The crack of the cast product according to claim 3, wherein the predetermined part is a part adjacent to a gate of the casting mold for introducing the molten metal into the cavity, and the draft is constant. Estimation method. 前記割れ推定ステップでは、
前記引っ張り強度が閾値強度以上であり、かつ前記鋳造金型の前記鋳造品の所定部位に対応する領域の温度であって、前記型締め前の前記鋳造金型への離型剤の塗布が完了してから前記キャビティへの溶湯の射出が完了するまでの間の時点における温度が、閾値温度以下である場合に、前記割れが発生しないと推定し、
前記引っ張り強度が前記閾値強度よりも低い、または前記鋳造金型の前記鋳造品の所定部位に対応する領域の温度であって、前記型締め前の前記鋳造金型への離型剤の塗布が完了してから前記キャビティへの溶湯の射出が完了するまでの間の時点における温度が前記閾値温度よりも大きい場合に割れが発生すると推定することを特徴とする請求項１から請求項４の何れか一項に記載の鋳造品の割れ推定方法。 In the crack estimation step,
The tensile strength is equal to or higher than the threshold strength, and the temperature is in a region corresponding to a predetermined portion of the casting product of the casting mold, and the application of the release agent to the casting mold before the clamping is completed. Then, when the temperature at the time point until the injection of the molten metal into the cavity is completed is less than the threshold temperature, it is estimated that the crack does not occur,
The tensile strength is lower than the threshold strength, or a temperature in a region corresponding to a predetermined part of the cast product of the casting mold, and the mold release agent is applied to the casting mold before clamping. 5. The method according to claim 1, wherein a crack is estimated to occur when a temperature at a time point between completion and injection of molten metal into the cavity is greater than the threshold temperature. The method for estimating cracks in a cast product according to claim 1. 前記金型温度取得ステップでは、前記射出する前の前記鋳造金型の温度を取得することを特徴とする請求項１から請求項６の何れか一項に記載の鋳造品の割れ推定方法。   The method for estimating cracks in a cast product according to any one of claims 1 to 6, wherein, in the mold temperature acquisition step, a temperature of the casting mold before the injection is acquired. 前記引っ張り強度取得ステップでは、前記型開き時の引っ張り強度を取得することを特徴とする請求項１から請求項７の何れか一項に記載の鋳造品の割れ推定方法。   The method for estimating cracks in a cast product according to any one of claims 1 to 7, wherein in the tensile strength acquisition step, the tensile strength at the time of mold opening is acquired. 前記引っ張り強度取得ステップでは、前記鋳造品の前記鋳造金型からの取り出し時の引っ張り強度を取得することを特徴とする請求項１から請求項７の何れか一項に記載の鋳造品の割れ推定方法。   The estimation of cracks in a cast product according to any one of claims 1 to 7, wherein in the tensile strength acquisition step, the tensile strength at the time of taking out the cast product from the casting mold is acquired. Method. 請求項１から請求項８の何れか一項に記載の鋳造品の割れ推定方法を、コンピュータに実行させるための鋳造品の割れ推定プログラム。   A casting product crack estimation program for causing a computer to execute the casting product crack estimation method according to any one of claims 1 to 8. 請求項９に記載の鋳造品の割れ推定プログラムを記憶したコンピュータで読み取り可能な記憶媒体。   A computer-readable storage medium that stores the casting crack estimation program according to claim 9. 請求項１から請求項８の何れか一項に記載の鋳造品の割れ推定方法を実行するように構成されたコンピュータを有することを特徴とする鋳造品の割れ推定装置。   A casting product crack estimation apparatus comprising a computer configured to execute the casting product crack estimation method according to any one of claims 1 to 8.
JP2015062384A 2015-03-25 2015-03-25 Cast product crack estimation method, cast product crack estimation device, cast product crack estimation program, and storage medium storing cast product crack estimation program Expired - Fee Related JP6346116B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2015062384A JP6346116B2 (en) 2015-03-25 2015-03-25 Cast product crack estimation method, cast product crack estimation device, cast product crack estimation program, and storage medium storing cast product crack estimation program
CN201610150746.XA CN106001489B (en) 2015-03-25 2016-03-16 The crackle estimating device and method and storage medium of cast member

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2015062384A JP6346116B2 (en) 2015-03-25 2015-03-25 Cast product crack estimation method, cast product crack estimation device, cast product crack estimation program, and storage medium storing cast product crack estimation program

Publications (2)

Publication Number Publication Date
JP2016179495A true JP2016179495A (en) 2016-10-13
JP6346116B2 JP6346116B2 (en) 2018-06-20

Family

ID=57082807

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2015062384A Expired - Fee Related JP6346116B2 (en) 2015-03-25 2015-03-25 Cast product crack estimation method, cast product crack estimation device, cast product crack estimation program, and storage medium storing cast product crack estimation program

Country Status (2)

Country Link
JP (1) JP6346116B2 (en)
CN (1) CN106001489B (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11300462A (en) * 1998-04-20 1999-11-02 Japan Steel Works Ltd:The Nozzle temperature control method and nozzle temperature controller for metal injection molding machine as well as sprue bushing temperature control method and sprue bushing temperature controller
JP2005046892A (en) * 2003-07-30 2005-02-24 Toyota Motor Corp Method for designing metallic mold
JP2007167893A (en) * 2005-12-21 2007-07-05 Toyota Motor Corp Method for estimating casting crack and system for estimating casting crack
JP2009125795A (en) * 2007-11-27 2009-06-11 Aisin Aw Co Ltd Method for estimating shrinkage cracking in casting, shrinkage cracking estimating device therefor, shrinkage cracking estimating program therefor, recording medium with the program recorded thereon, and molding die production method therefor
JP2010167462A (en) * 2009-01-23 2010-08-05 Toyota Motor Corp Device of discharging mold releasing agent
US20110144788A1 (en) * 2009-12-16 2011-06-16 Gm Global Technology Operations, Inc. Method for simulating casting defects and microstructures of castings
JP2014213525A (en) * 2013-04-25 2014-11-17 マツダ株式会社 Method of designing injection molding mold, mold designing system, mold designing program and computer-readable memory medium storing mold designing program

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006224118A (en) * 2005-02-16 2006-08-31 Toyota Motor Corp Method for analyzing strength of cast product and program thereof
CN101559482A (en) * 2009-05-26 2009-10-21 华南理工大学 Method for manufacturing magnesium alloy die casting
CN102211165A (en) * 2011-05-10 2011-10-12 山东省科学院新材料研究所 Method for die casting magnesium alloy guide sleeve
CN102974801A (en) * 2011-09-02 2013-03-20 吴江市五龙阀门机械有限责任公司 Casting surface crack eliminating method
JP5615327B2 (en) * 2012-08-10 2014-10-29 トヨタ自動車株式会社 Aluminum casting mold and cast aluminum product cast using the same

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11300462A (en) * 1998-04-20 1999-11-02 Japan Steel Works Ltd:The Nozzle temperature control method and nozzle temperature controller for metal injection molding machine as well as sprue bushing temperature control method and sprue bushing temperature controller
JP2005046892A (en) * 2003-07-30 2005-02-24 Toyota Motor Corp Method for designing metallic mold
JP2007167893A (en) * 2005-12-21 2007-07-05 Toyota Motor Corp Method for estimating casting crack and system for estimating casting crack
JP2009125795A (en) * 2007-11-27 2009-06-11 Aisin Aw Co Ltd Method for estimating shrinkage cracking in casting, shrinkage cracking estimating device therefor, shrinkage cracking estimating program therefor, recording medium with the program recorded thereon, and molding die production method therefor
JP2010167462A (en) * 2009-01-23 2010-08-05 Toyota Motor Corp Device of discharging mold releasing agent
US20110144788A1 (en) * 2009-12-16 2011-06-16 Gm Global Technology Operations, Inc. Method for simulating casting defects and microstructures of castings
JP2014213525A (en) * 2013-04-25 2014-11-17 マツダ株式会社 Method of designing injection molding mold, mold designing system, mold designing program and computer-readable memory medium storing mold designing program

Also Published As

Publication number Publication date
JP6346116B2 (en) 2018-06-20
CN106001489A (en) 2016-10-12
CN106001489B (en) 2019-06-07

Similar Documents

Publication Publication Date Title
JP5647552B2 (en) Tilt-type gravity casting method
JP2008212942A (en) Method for manufacturing cylinder block
JP2014065062A (en) Die casting device
JP2008080356A (en) Metal mold design method and metal mold casting method
JP2009255118A (en) Rough material cooling apparatus and method
JP6346116B2 (en) Cast product crack estimation method, cast product crack estimation device, cast product crack estimation program, and storage medium storing cast product crack estimation program
JP2009136902A (en) Pressure casting method of wheel for vehicle, device used for the same, and wheel material for vehicle
JP2015039723A (en) Casting method of wheel or wheel center part
KR102563484B1 (en) Method for high-pressure die casting
JP2011240392A (en) Casting apparatus, die structure, and casting method
JP6421679B2 (en) Manufacturing method of casting products
JP2007125589A (en) Apparatus and method for analyzing casting process
JP4637609B2 (en) Chill vent nesting
JP2018012137A (en) Tilt-type gravity casting apparatus and tilt-type gravity casting method
JP7256448B2 (en) Casting analysis method
JP6320056B2 (en) Mold equipment
JP2016203197A (en) Pressure application pin control method and pressure application pin control device
JP6545215B2 (en) Casting apparatus and method of manufacturing cast product
JP2009269073A (en) Die-casting method and die-casting device
JP5071642B2 (en) Analysis method of molten metal flow
JP2009298035A (en) Method for designing mold
JP2003220459A (en) Die-casting equipment
JP2007125593A (en) Apparatus and method for analyzing casting process
JP6354543B2 (en) Die casting apparatus and die casting method
JP6725877B2 (en) Die casting initial temperature setting method

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20170317

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20180216

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20180313

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20180421

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20180522

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20180524

R150 Certificate of patent or registration of utility model

Ref document number: 6346116

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

LAPS Cancellation because of no payment of annual fees