JPH07124734A - Pressure in die measuring unit and casting die having therefor - Google Patents
Pressure in die measuring unit and casting die having thereforInfo
- Publication number
- JPH07124734A JPH07124734A JP27951193A JP27951193A JPH07124734A JP H07124734 A JPH07124734 A JP H07124734A JP 27951193 A JP27951193 A JP 27951193A JP 27951193 A JP27951193 A JP 27951193A JP H07124734 A JPH07124734 A JP H07124734A
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- Prior art keywords
- pressure
- mold
- deflection
- die
- plate
- 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.)
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は，例えば，アルミニウム
合金やマグネシウム合金等の軽金属合金を金型を用いて
加圧鋳造する際に有用な金型内圧力変動計測装置および
この装置を備えた鋳造用金型に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure fluctuation measuring device in a mold useful for pressure casting a light metal alloy such as an aluminum alloy or a magnesium alloy, and a casting equipped with this device. It is related to the mold.
【０００２】[0002]
【従来の技術】従来より，アルミニウム合金等の軽金属
合金を鋳造する際は，一般的に，引け巣を低減するた
め，溶湯を金型に鋳込んでから凝固が完了するまでの
間，高圧力を加圧し続ける方法が採られてきた。特に，
自動車部品等のように耐圧性，高強度等の高品質が要求
される場合，上記のような高圧で鋳造する方法が多く用
いられている。この場合，製品各部に充填している溶湯
に加わる圧力の大きさが，製品の品質に大きく影響を及
ぼす。このため，従来より，溶湯の圧力を計測して，そ
れを鋳造条件の管理に利用することがあったが，その場
合には，押出ピンの裏に歪ゲージをセットし，溶湯の圧
力を計測していた。2. Description of the Related Art Conventionally, when casting a light metal alloy such as an aluminum alloy, in general, in order to reduce shrinkage cavities, high pressure is applied from the time when the molten metal is cast into the mold until the solidification is completed. The method of continuing to pressurize has been adopted. In particular,
When high quality such as pressure resistance and high strength is required such as automobile parts, the above-mentioned high pressure casting method is often used. In this case, the magnitude of the pressure applied to the molten metal filling each part of the product greatly affects the quality of the product. For this reason, conventionally, the pressure of the molten metal was sometimes measured and used to control the casting conditions. In that case, a strain gauge was set on the back of the extrusion pin and the pressure of the molten metal was measured. Was.
【０００３】[0003]
【発明が解決しようとする課題】従来のように，押出ピ
ンの裏に歪ゲージをセットした場合，押出ピンの金型等
に対する摺動抵抗や摩擦力のため，計測値が正確でない
という問題があった。この摺動抵抗は，鋳造を続けてい
くうちに，焼付き，かじり等によって増加する。なお，
特願平４−３４２５７５号に記載した，加圧力をパルス
的に加える場合，特に，この問題が大きくクローズアッ
プされる。すなわち，押出ピンにかけられた圧力が減少
から増加に転じた場合，その増加分が静止摩擦力を越え
るまでの間は，押出ピンは静止してしまう。逆に，圧力
が増加から減少に転じた場合も，その減少分が静止摩擦
力を越えるまでの間は，押出ピンは静止する。そのた
め，圧力変動が静止摩擦力より小さい場合は，押出ピン
が全く動かず，圧力変動を計測できないケースがでてく
ることがあった。When a strain gauge is set on the back of the extrusion pin as in the prior art, there is a problem that the measured value is not accurate due to the sliding resistance and frictional force of the extrusion pin with respect to the mold or the like. there were. This sliding resistance increases due to seizure, galling, etc. as casting is continued. In addition,
This problem is greatly highlighted especially when the pressure is applied in a pulsed manner as described in Japanese Patent Application No. 4-342575. That is, when the pressure applied to the extrusion pin changes from a decrease to an increase, the extrusion pin remains stationary until the increase exceeds the static friction force. Conversely, when the pressure changes from increasing to decreasing, the push pin remains stationary until the amount of decrease exceeds the static friction force. Therefore, if the pressure fluctuation is smaller than the static frictional force, the extrusion pin may not move at all and the pressure fluctuation may not be measured in some cases.
【０００４】[0004]
【課題を解決するための手段】本発明は，このような欠
点を解消するために，金型のキャビティに面した部分の
一部を，加圧力によって撓むような構造にし，従来のよ
うに摺動抵抗を受けることなく，正確に溶湯の圧力を計
測できるようにした。そのために，本発明においては，
金型のキャビティ側の表面の一部に撓み板部を設け，撓
み板部の中央部裏側に先端が接している撓み量伝達棒を
配し，撓み量伝達棒の後端面に撓み量計測板を押付けた
状態で配し，金型に取付けた保持具で撓み量計測板の外
周部を支持し，撓み量計測板の裏面に歪ゲージを取付
け，かつ，撓み板部の中央部裏面に接している撓み量伝
達棒の先端中央部を球面状や断面円錐台状や尖った形状
等のように先細形状にした構成にした。SUMMARY OF THE INVENTION In order to solve such a drawback, the present invention has a structure in which a part of a portion of a mold facing a cavity is bent by a pressing force, and the conventional sliding method is adopted. The pressure of the molten metal can be measured accurately without any dynamic resistance. Therefore, in the present invention,
A bending plate is provided on a part of the cavity-side surface of the mold, and a bending amount transmission rod whose tip is in contact with the back side of the central portion of the bending plate is arranged. Is placed in a pressed state, the outer circumference of the flexure amount measurement plate is supported by a holder attached to the mold, a strain gauge is attached to the back surface of the flexure amount measurement plate, and the back surface of the center part of the flexure plate portion is in contact. The central portion of the tip of the bending amount transmitting rod is formed into a tapered shape such as a spherical shape, a truncated cone shape or a pointed shape.
【０００５】[0005]
【作用】金型キャビティ内の溶湯の圧力の作用により，
撓み板部が撓み，それに応じて，撓み量伝達棒を介して
後方の撓み量計測板が撓み，その撓み量を歪ゲージで計
測する。勿論，溶湯の圧力が変動した場合は，その変動
状態を逐次検知する。この場合，振動部に加わる圧力の
大きさに比例して撓み部が撓むので，例え小さな圧力変
動しか加わらなくとも，圧力が計測できる。また，撓み
板部の中央部裏面に接している撓み量伝達棒の先端中央
部を先細形状にしたので，撓み板部に偏荷重が作用した
場合でも，撓み量伝達棒の先端中央部が常に撓み板部の
中央部裏面に接していることになり，荷重が撓み量伝達
棒に常に正しく伝わる。その結果，常に正しい圧力値を
求めることができる。[Operation] By the action of the pressure of the molten metal in the mold cavity,
The bending plate portion bends, and accordingly, the bending amount measuring plate at the rear side bends via the bending amount transmission rod, and the bending amount is measured by a strain gauge. Of course, when the pressure of the molten metal fluctuates, the fluctuation state is sequentially detected. In this case, since the bending portion bends in proportion to the magnitude of the pressure applied to the vibrating portion, the pressure can be measured even if only a small pressure fluctuation is applied. In addition, since the central portion of the tip of the bending amount transmitting rod that is in contact with the back surface of the central portion of the bending plate portion is tapered, even if an unbalanced load is applied to the bending plate portion, the central portion of the leading end of the bending amount transmitting rod is always Since it is in contact with the back surface of the center of the bending plate, the load is always correctly transmitted to the bending amount transmission rod. As a result, the correct pressure value can always be obtained.
【０００６】[0006]
【実施例】図１は本発明の金型内圧力変動計測装置４の
１実施例を示す縦断面図である。１は金型の一部，２は
金型１内の溶湯鋳込空間であるキャビティ，３は金型１
のキャビティ２側の表面の一部に設けた比較的に薄い円
形状の撓み板部であり，撓み板部３は中心部の比較的に
薄い円形状の第１の薄板部３ａと，その回りのそれより
も幾分厚い円形状の第２の薄板部３ｂとで形成した。撓
み板部３の後方には，少し深い穴５が後側から設けられ
ている。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a vertical sectional view showing an embodiment of a pressure fluctuation measuring device 4 in a mold of the present invention. 1 is a part of the mold, 2 is a cavity which is a molten metal pouring space in the mold 1, 3 is the mold 1
Is a relatively thin circular flexible plate portion provided on a part of the surface of the cavity 2 side, and the flexible plate portion 3 has a relatively thin circular first thin plate portion 3a at the center and its surroundings. And a second thin plate portion 3b having a circular shape that is somewhat thicker than that. A slightly deep hole 5 is provided at the rear of the flexible plate 3 from the rear side.
【０００７】撓み板部３の中央部の裏側には，丸棒状の
撓み量伝達棒６の先端を接しさせて配し，撓み量伝達棒
６の後端面に薄い円形状の撓み量計測板７を押付けた状
態で配した。撓み板部３の中央部裏面に接している撓み
量伝達棒６の先端中央部６ａは，球面状や断面円錐台状
や尖った形状等のように中央部が先細形状になるように
した。On the back side of the central portion of the bending plate portion 3, a round bar-shaped bending amount transmission rod 6 is disposed so as to be in contact with it, and a thin circular bending amount measuring plate 7 is provided on the rear end surface of the bending amount transmission rod 6. Was placed in a pressed state. The tip central portion 6a of the deflection amount transmitting rod 6 which is in contact with the rear surface of the central portion of the flexible plate portion 3 has a tapered central portion such as a spherical shape, a truncated cone shape or a pointed shape.
【０００８】このように，先端中央部６ａを先細形状に
したのは，撓み板部３に偏荷重が作用した場合でも，撓
み量伝達棒６の先端中央部が常に撓み板部３の中央部裏
面に接していることになり，荷重が撓み量伝達棒６に常
に正しく伝わり，その結果，常に正しい圧力値を求める
ことができるようにしたためである。As described above, the tip end central portion 6a is tapered so that the tip end central portion of the deflection amount transmitting rod 6 is always the center portion of the bending plate portion 3 even when an eccentric load is applied to the bending plate portion 3. This is because it comes into contact with the back surface, and the load is always correctly transmitted to the deflection amount transmission rod 6, and as a result, the correct pressure value can always be obtained.
【０００９】なお，例えば，図２に示すように，撓み量
伝達棒６の先端を角状にし，先端面を広くしておくと，
撓み板部３に偏荷重Ｆがかかった場合，撓み板部３の裏
面が撓み量伝達棒６の先端面の一端部６ｂのみに接した
状態で撓み，先端中央部に接しなくなり，その結果，撓
み量伝達棒６には正しく荷重が伝わらなくなり，正しい
圧力値が求められなくなる。Incidentally, for example, as shown in FIG. 2, when the tip of the deflection amount transmitting rod 6 is made into a square shape and the tip surface is widened,
When an eccentric load F is applied to the bending plate portion 3, the bending plate portion 3 bends in a state where the back surface of the bending plate portion 3 is in contact with only one end portion 6b of the tip end surface of the bending amount transmission rod 6, and is not in contact with the tip end central portion. The load is not correctly transmitted to the deflection amount transmission rod 6, and the correct pressure value cannot be obtained.
【００１０】穴５の中には，中央に撓み量伝達棒６をブ
ッシュ８を介して摺動自在に貫通したブロック９を装入
し，ブロック９は，その外周に近い先端面を撓み板部３
の第２の薄板部３ｂの裏面に接触させた状態で，ねじ１
０によって，金型１の後側に取付けた。１１はブロック
９の撓み板部３側の面に設けた円形状の薄い切欠部で，
第２の薄板部３ｂの内径よりも大きくて外径よりも小さ
い径を有する切欠部１１にした。９ａはリング状の部分
である。A block 9 is inserted in the hole 5 in the center so that a flexure amount transmission rod 6 is slidably penetrated through a bush 8, and the block 9 has a tip end surface close to the outer periphery of the flexure plate portion. Three
Of the screw 1 while being in contact with the back surface of the second thin plate portion 3b of
It was attached to the rear side of the mold 1 by 0. Reference numeral 11 denotes a circular thin notch provided on the surface of the block 9 on the side of the flexible plate 3,
The cutout portion 11 has a diameter larger than the inner diameter of the second thin plate portion 3b and smaller than the outer diameter. 9a is a ring-shaped portion.
【００１１】ブロック９の中央部後端側には円形穴１２
を設け，円形穴１２の中には，撓み量計測板７の外周部
を押えておくための円筒状の押え部材１３を，ねじ１４
によって取付け，押え部材１３の作用で，撓み量計測板
７の中央部を撓み量伝達棒６の後端面に所定の力で押付
けておくようにした。ここで，ブロック９や押え部材１
３は，撓み量計測板７の外周部を支持しておくための金
型１に取付けた保持具を構成している。撓み量計測板７
の裏面には市販の歪ゲージ１５がはり付けられており，
歪ゲージ１５は，図示していない歪量計測器本体に連結
されている。A circular hole 12 is formed on the rear end side of the central portion of the block 9.
And a cylindrical holding member 13 for holding the outer peripheral portion of the deflection amount measuring plate 7 in the circular hole 12, and a screw 14
The central portion of the bending amount measuring plate 7 is pressed against the rear end face of the bending amount transmitting rod 6 with a predetermined force by the action of the pressing member 13. Here, the block 9 and the pressing member 1
Reference numeral 3 constitutes a holder attached to the mold 1 for supporting the outer peripheral portion of the deflection amount measuring plate 7. Deflection amount measuring plate 7
A commercially available strain gauge 15 is attached to the back of the
The strain gauge 15 is connected to a strain amount measuring device body (not shown).
【００１２】金型キャビティ内の溶湯の圧力の作用によ
り，撓み板部３が撓み，それに応じて，撓み量伝達棒６
を介して後方の撓み量計測板７が撓み，その撓み量を歪
ゲージ１５で計測する。勿論，溶湯の圧力が変動した場
合は，その変動状態を逐次検知する。この装置において
は，撓み板部３が撓み量伝達棒６を介して撓み量計測板
７に繋がっているので，撓み量計測板７の歪量は，圧力
の大きさに比例して撓む撓み板部３の歪量と対応してい
る。そして，撓み板部３の厚みやブロック８と押え部材
１３の内径の大きさ等を考慮して，撓み量計測板７の歪
量から撓み板部３に作用した圧力を換算して常にすぐに
正確に求めることができる。換算して得た圧力は，数値
として表示したり，グラフに表示したりして，その圧力
変動状態を知ることができる。そして，例え小さな圧力
変動しか加わらなくても圧力を計測できる。The bending plate portion 3 is bent by the action of the pressure of the molten metal in the mold cavity, and the bending amount transmitting rod 6 is correspondingly bent.
The bending amount measuring plate 7 on the rear side bends via the, and the amount of bending is measured by the strain gauge 15. Of course, when the pressure of the molten metal fluctuates, the fluctuation state is sequentially detected. In this device, since the bending plate portion 3 is connected to the bending amount measuring plate 7 via the bending amount transmitting rod 6, the bending amount of the bending amount measuring plate 7 bends in proportion to the pressure. It corresponds to the amount of strain of the plate portion 3. Then, in consideration of the thickness of the flexible plate portion 3 and the sizes of the inner diameters of the block 8 and the pressing member 13, the pressure acting on the flexible plate portion 3 is converted immediately from the strain amount of the flexible amount measuring plate 7 immediately. Can be accurately determined. The pressure obtained by the conversion can be displayed as a numerical value or displayed in a graph to know the pressure fluctuation state. The pressure can be measured even if only small pressure fluctuations are applied.
【００１３】つぎに，図１に示したような金型内圧力変
動計測装置Ａを備えた鋳造用金型について説明する。図
３，図４は本発明の鋳造用金型の１実施例およびその作
動状態を示す縦断面図である。図３，図４において，１
は比較的に大きなキャビティ２を有する雌の金型，１６
は雄金型であり，雌金型１はその底部１ａがボルト１ｂ
によって上部本体１ｃに対して取付け取外し可能に取付
けられている。雄金型１６は上下に貫通した穴１７を有
し，穴１７は上から溶湯供給穴１７ａと鋳込製品が形成
される比較的に小さなキャビティ１７ｂによって形成さ
れている。雄金型１６は固定盤１８に固定されている。
この場合，固定盤１８は図示していない部材によって定
位置に固定されており，したがって，雄金型１６も定位
置に静止している。Next, a casting mold provided with the mold pressure fluctuation measuring device A as shown in FIG. 1 will be described. 3 and 4 are longitudinal sectional views showing an embodiment of the casting mold of the present invention and its operating state. In FIGS. 3 and 4, 1
Is a female mold with a relatively large cavity 2, 16
Is a male mold, and the female mold 1 has a bolt 1b at its bottom 1a.
Is detachably attached to the upper main body 1c. The male die 16 has a hole 17 penetrating vertically, and the hole 17 is formed by a molten metal supply hole 17a from above and a relatively small cavity 17b in which a casting product is formed. The male die 16 is fixed to a stationary platen 18.
In this case, the fixed platen 18 is fixed in place by a member (not shown), and thus the male die 16 is also stationary in place.
【００１４】固定盤１８の上には，注湯用のスリーブ１
９やじょうご２０等からなる注湯装置２１がスリーブ１
９を溶湯供給穴１７ａの中に出し入れできるように上下
動自在に設けられている。また，注湯装置２１は，上昇
してスリーブ１９が溶湯供給穴１７ａに入っていない時
に，横方向に移動させ得るようにも設けられている。２
２は可動盤等の雌の金型１の保持部材，２３は保持部材
２２の下に連結したアクチュエータであり，雌の金型１
等はこの駆動装置２３により上下動に移動可能に設けら
れている。A sleeve 1 for pouring the molten metal is provided on the stationary platen 18.
The pouring device 21 consisting of 9 and funnel 20 etc. is the sleeve 1
It is provided so as to be vertically movable so that 9 can be put into and taken out of the molten metal supply hole 17a. The pouring device 21 is also provided so as to be able to move laterally when the sleeve 19 is raised and the sleeve 19 is not in the molten metal supply hole 17a. Two
Reference numeral 2 is a holding member of the female mold 1 such as a movable plate, 23 is an actuator connected under the holding member 22, and the female mold 1
Etc. are provided so as to be vertically movable by the drive device 23.
【００１５】アクチュエータ２３は，キャビティ２，１
７ｂ内の凝固する溶湯２４に加圧力をパルス的に加え得
るもので，図３，図４に示すように，油圧シリンダ２３
ａとピストンロッド２３ｂと，加圧力供給装置２５を有
しており，この加圧力供給装置２５は，油圧シリンダ２
３ａに供給する作動油の圧力を，例えば２５０〜６００
ｋｇ／ｃｍ2 のような高圧力と，例えば０〜３００ｋｇ
／ｃｍ2 のようにこの高圧力よりも比較的に低い低圧力
とし，この高圧力と比較的に低い低圧力をパルス的に交
互に（波状的に）油圧シリンダ２３ａに作用させ得るサ
ーボバルブやリリーフ弁等からなる供給圧力設定変動装
置２６や，ある時間当りの加圧力変動回数（周波数）設
定器を内蔵した加圧力変動指示装置２７を有している。
２８はポンプである。The actuator 23 includes the cavities 2, 1
A pressure can be applied in a pulsed manner to the solidified molten metal 24 in 7b. As shown in FIGS.
a, a piston rod 23b, and a pressurizing force supply device 25. The pressurizing force supply device 25 includes the hydraulic cylinder 2
The pressure of the hydraulic oil supplied to 3a is, for example, 250 to 600.
High pressure such as kg / cm 2 and, for example, 0 to 300 kg
A low pressure such as / cm 2 which is relatively lower than this high pressure, and the high pressure and the relatively low pressure can be applied to the hydraulic cylinder 23a alternately in a pulsed manner (in a wavy manner). It has a supply pressure setting fluctuation device 26 composed of a relief valve and the like, and a pressurization pressure fluctuation instructing device 27 incorporating a pressurization frequency (frequency) setting unit per unit time.
28 is a pump.
【００１６】また，図４に示すように，雄金型１６の上
方には，溶湯供給穴１７ａに出し入れ可能な押出ピン２
９を下面に取付けた部材３０が上下動自在および横方向
移動自在に設けられている。３１は固定保持盤である。
なお，３２は鋳造時にキャビティ２の内面に接して配置
しておくセラミックペーパであり，固相が晶出しない状
態で鋳造するための薄い保温材である。Further, as shown in FIG. 4, above the male die 16, there is an extrusion pin 2 which can be inserted into and taken out from the molten metal supply hole 17a.
A member 30 having a lower surface 9 attached thereto is provided so as to be vertically movable and laterally movable. Reference numeral 31 is a fixed holding plate.
Reference numeral 32 is a ceramic paper which is placed in contact with the inner surface of the cavity 2 during casting, and is a thin heat insulating material for casting in a state where the solid phase does not crystallize.
【００１７】金型１のキャビティ２側の面の一部，例え
ば，図３，図４のＡ部には，図１にも示すように，溶湯
２４の圧力変動で振動する薄板状の撓み板部３でもある
振動板部３を設けた。振動板部３の金型１の構造は，例
えば，前記した図１に示すような構造にした。As shown in FIG. 1, a part of the surface of the mold 1 on the cavity 2 side, for example, the portion A in FIGS. 3 and 4, is a thin plate-shaped flexible plate which vibrates due to the pressure fluctuation of the molten metal 24. The diaphragm portion 3 which is also the portion 3 is provided. The structure of the die 1 of the diaphragm 3 is, for example, the structure shown in FIG.
【００１８】つぎに，この作動について説明する。図３
に示す状態で，注湯装置２１を介してキャビティ２内に
溶湯２４を供給し，注湯する。キャビティ２内に溶湯２
４を供給したら，注湯装置２１を邪魔にならない位置ま
で移動させた後，押出ピン２９を溶湯供給穴１７ａの中
に入れる。この状態で，図４に示すように，保持部材２
２や雌の金型１等を上昇させ，部材３０が固定保持盤３
１に押圧されるまで上昇させ，加圧させる。Next, this operation will be described. Figure 3
In the state shown in (1), the molten metal 24 is supplied into the cavity 2 through the pouring device 21 and poured. Molten metal 2 in cavity 2
After feeding 4, the pouring device 21 is moved to a position where it does not get in the way, and the extrusion pin 29 is put into the molten metal supply hole 17a. In this state, as shown in FIG. 4, the holding member 2
2 and the female die 1 are raised, and the member 30 is fixed to the holding plate 3.
It is raised and pressed until it is pressed to 1.
【００１９】この時，図４に示すように，雄金型１６は
雌の金型１のキャビティ２内に深く入り込んだ状態とな
り，溶湯２４は雄金型１６のキャビティ１７ｂ内に入
り，押圧される。なお，この時，押出ピン２９の外周面
のわずかなすき間からキャビティ１７ｂ内のエアが抜け
る。キャビティ１７ｂ内の溶湯２４は冷却凝固して鋳込
製品となる。ただし，溶湯２４がキャビティ１７ｂ内に
入ったら，直ちに，あるいは，充填が終わる直前から，
アクチュエータ２３内の加圧力供給装置２５を作動さ
せ，油圧シリンダ２３ａ内に，例えば，６００ｋｇ／ｃ
ｍ2 の高圧力と，６０ｋｇ／ｃｍ2 のような比較的に低
圧力の作動油を，例えば１０Ｈｚや１００Ｈｚで，パル
ス的に交互に作用させて，凝固する溶湯２４に加圧力を
パルス的に加える。このパルス的な加圧力は前記した金
型内圧力変動計測装置４により順次計測される。At this time, as shown in FIG. 4, the male die 16 is deeply inserted into the cavity 2 of the female die 1, and the molten metal 24 enters the cavity 17b of the male die 16 and is pressed. It At this time, the air in the cavity 17b escapes from a slight gap in the outer peripheral surface of the push pin 29. The molten metal 24 in the cavity 17b is cooled and solidified into a cast product. However, immediately after the molten metal 24 enters the cavity 17b, or immediately before the filling is completed,
The pressurizing force supply device 25 in the actuator 23 is actuated to, for example, 600 kg / c in the hydraulic cylinder 23a.
High pressure of m 2 and hydraulic oil of relatively low pressure such as 60 kg / cm 2 are caused to act alternately in a pulsed manner at 10 Hz or 100 Hz, for example, to apply a pressure force to the molten metal 24 which solidifies in a pulsed manner. Add. This pulse-like pressure is sequentially measured by the pressure variation measuring device 4 in the mold.
【００２０】この高圧力は例えば２５０ｋｇ／ｃｍ2 以
上で適宜設定して良いし，低圧力も設定した高圧力より
も低い圧力で適宜設定して良い。勿論，低圧力を０ｋｇ
／ｃｍ2 にすることもできるし，設定高圧力に比較的に
近い圧力にすることもできる。また，高圧力と低圧力を
パルス的に加える場合，その周波数は０．５〜１０００
Ｈｚの間で適宜設定することもできる。なお，周波数が
大きすぎると装置の取付け，操作に支障が出る場合があ
るので，せいぜい１０００Ｈｚ程度にする。なお，通常
は，１０Ｈｚないしは１００Ｈｚ程度で良い。The high pressure may be appropriately set to, for example, 250 kg / cm 2 or more, and the low pressure may be appropriately set to a pressure lower than the set high pressure. Of course, low pressure is 0kg
The pressure can be set to be / cm 2 or a pressure relatively close to the set high pressure. When high pressure and low pressure are applied in pulses, the frequency is 0.5 to 1000.
It can also be set appropriately between Hz. If the frequency is too high, the installation and operation of the device may be hindered, so set the frequency to about 1000 Hz at most. It should be noted that normally, about 10 Hz or 100 Hz is sufficient.
【００２１】図５は図１，図３，図４に示す装置におい
て，ＡＣ４ＣＨのアルミニウム合金を，金型温度２００
℃の金型１，３内に，注湯温度７６０℃で注入し，加圧
力を３００±４０ｋｇ／ｃｍ2 とし，すなわち，高圧力
を３４０ｋｇ／ｃｍ2 ，低圧力を２６０ｋｇ／ｃｍ2 に
設定し，１００Ｈｚのパルス状の加圧力をアクチュエー
タ１２に作用させた場合の時間−加圧力曲線である。な
お，図５には，参考までに雌の金型１の移動ストローク
も合わせて図示した。図５に示す時間の計時点は，給湯
後，雌の金型１を上昇させ始める時点とした。FIG. 5 shows the apparatus shown in FIGS. 1, 3 and 4 in which an AC4CH aluminum alloy is used at a mold temperature of 200.
It is poured into the molds 1 and 3 at ℃ at a pouring temperature of 760 ℃ and the pressure is set to 300 ± 40 kg / cm 2 , that is, the high pressure is set to 340 kg / cm 2 and the low pressure is set to 260 kg / cm 2. Is a time-pressurization curve when a pulsed pressurization force of 100 Hz is applied to the actuator 12. For reference, the moving stroke of the female die 1 is also shown in FIG. The total time shown in FIG. 5 was the time when the female mold 1 was started to be raised after the hot water was supplied.
【００２２】このようにすると，溶湯の凝固形態は，一
般的に，金型のキャビティ表面に面した溶湯表面だけで
なく，溶湯内でも核が発生し，凝固が進行し，その結
果，等軸晶が生成するという，いわゆる，マッシータイ
プと呼ばれている凝固形態になる。すなわち，溶湯に高
圧力とこの高圧力に比べて比較的に低い低圧力とが交互
に波状的に加えられることになるので，低圧力作用時に
は，一時的に金型表面の熱伝達係数が小さくなり，凝固
時に発生した潜熱が金型表面から充分抜熱されず，溶湯
温度が部分的に上昇する。このような，いわゆるレカレ
ンスによって，結晶遊離および樹枝状晶の枝の溶断遊離
が起こる。また，波状的に加えられた圧力のため，溶湯
が流動し，そのことも合いまって，結晶遊離，樹枝状晶
の枝の溶断遊離が促進される。In this way, the solidification form of the molten metal is generally such that not only the molten metal surface facing the cavity surface of the mold but also nuclei are generated in the molten metal and the solidification proceeds, resulting in equiaxed It becomes a so-called massy type solidification morphology in which crystals are formed. That is, since a high pressure and a low pressure that is relatively lower than this high pressure are alternately applied to the molten metal in a wavy manner, the heat transfer coefficient of the mold surface is temporarily reduced when low pressure is applied. The latent heat generated during solidification is not sufficiently removed from the mold surface, and the melt temperature partially rises. Such so-called recurrence causes crystal release and fusing release of dendrite branches. In addition, due to the pressure applied in a wavy manner, the molten metal flows, and this is also combined to promote crystal release and fusing release of dendrite branches.
【００２３】そのため，表面に生成されやすかった柱状
晶ができず，鋳込製品の内面全体に等軸晶が生成し，等
軸晶帯のみが形成されることになる。また，等軸晶帯に
偏析ができることもない。その結果，熱間割れも発生し
ないし，引け巣もほとんど発生しないし，高強度で靭性
を有する高品質の鋳込製品が得られる。Therefore, columnar crystals that are easily generated on the surface cannot be formed, and equiaxed crystals are generated on the entire inner surface of the cast product, and only equiaxed crystal zones are formed. In addition, segregation does not occur in the equiaxed zone. As a result, hot cracking does not occur, shrinkage cavities hardly occur, and high-quality cast products with high strength and toughness are obtained.
【００２４】以上のような作用が行われる時，本発明で
は，金型１の一部に組込んだ撓み板部でもある振動板部
３が，次に示すように作用し，例えば，数μｍ〜数１０
０μｍ振動する。すなわち，高圧力レベルで圧力変動が
振動板部３に作用した時，振動板部３は撓んで，第２の
薄板部３ｂの内周部がブロック９の図１に示す部に接
するので，第１の薄板部３ａは，この部を支点として
振動する。このとき，振動する薄板部３ａは，板厚は薄
いが，径が小さいため，リング状の部分９ａの内周部分
である部を支点として振動する時よりも大きい剛性と
なり，破壊することはない。When the above-described operation is performed, in the present invention, the vibrating plate portion 3 which is also a flexible plate portion incorporated in a part of the mold 1 acts as follows, for example, several μm. ~ Number 10
It vibrates by 0 μm. That is, when a pressure fluctuation acts on the diaphragm portion 3 at a high pressure level, the diaphragm portion 3 bends and the inner peripheral portion of the second thin plate portion 3b contacts the portion of the block 9 shown in FIG. The thin plate portion 3a of No. 1 vibrates with this portion as a fulcrum. At this time, the vibrating thin plate portion 3a has a small plate thickness but a small diameter, and therefore has a rigidity higher than that when vibrating with the inner peripheral portion of the ring-shaped portion 9a as a fulcrum and is not destroyed. .
【００２５】凝固が進行して低圧力レベルになった時に
は，振動板部３の撓み量が減少し，部を支点として振
動し始める。このときは，振動板部３の剛性が減少する
ため，小さい圧力変動でも，充分な振動振幅を確保でき
る。When the coagulation progresses to a low pressure level, the amount of bending of the vibrating plate portion 3 decreases, and the vibrating plate portion 3 starts to vibrate with the portion as a fulcrum. At this time, since the rigidity of the diaphragm portion 3 is reduced, a sufficient vibration amplitude can be secured even with a small pressure fluctuation.
【００２６】このように，溶湯が充填した直後は充分に
圧力変動が伝播されているにもかかわらず，凝固が進行
するに従って，圧力変動の減衰率が大きくなり，充分な
圧力変動が伝播しなくなるような場合，高圧力でも，破
壊しない程度の強度を持ち，圧力が減衰した時でも，充
分にパルス加圧効果が増幅できる程度に振動するよう，
撓み量で剛性が非線形に変化する振動板部３を金型１に
組込んだので，凝固が進行した時でも，充分にパルス加
圧の効果が発現する。As described above, although the pressure fluctuation is sufficiently propagated immediately after the molten metal is filled, the damping rate of the pressure fluctuation increases as the solidification progresses, and the sufficient pressure fluctuation does not propagate. In such a case, it has enough strength not to break even at high pressure, and vibrates so that the pulse pressurizing effect can be sufficiently amplified even when the pressure is attenuated.
Since the vibrating plate portion 3 whose rigidity changes nonlinearly with the amount of bending is incorporated in the mold 1, the effect of pulse pressurization is sufficiently exhibited even when the solidification progresses.
【００２７】パルス加圧の効果は，圧力変動に伴う金型
表面の熱抵抗の急変に起因する現象と，溶湯中を伝播し
てきた縦波による溶湯の流動，すなわち，溶湯自身の微
小振動に起因する現象により発現する。ごく僅かな圧力
変動しか伝播しない部分では，圧力変動に伴う金型表面
の熱抵抗の急変に起因する現象は，あまり期待できな
い。そこで，溶湯中を伝播してきた縦波による溶湯自身
の微小振動を，増幅する必要がある。金型の表面が全く
振動しない場合は，金型表面が固定端となる。このた
め，溶湯中を伝播してくる縦波と金型表面から反射した
反射波の重ね合わせにより，金型表面では，溶湯自身の
微小振動は発生しない。しかし，本発明のように，金型
の一部を振動させると，入射波と反射波の位相がずれ，
微小振動が発生し始める。特に位相が１８０゜〜３６０
゜ずれた場合，入射波と反射波の重ね合わせで，微小振
動は増幅される。その結果，前記したように，溶湯の凝
固形態は金型のキャビティ表面に面した溶湯表面だけで
なく，溶湯内でも核が発生し，凝固が進行する。すなわ
ち，微細等軸晶組織を生成するマッシー型の凝固形態に
なる。そして，熱間割れも偏析もほとんど発生せず，高
強度で靭性を有する高品質の鋳込製品が得られる。な
お，このパルス加圧による鋳造は，特に，比較的に厚物
や大物の鋳込製品の鋳造時に有用である。The effect of pulse pressurization is due to a phenomenon caused by a sudden change in the thermal resistance of the die surface due to pressure fluctuation and a flow of the molten metal due to longitudinal waves propagating in the molten metal, that is, a minute vibration of the molten metal itself. It is manifested by the phenomenon. In the portion where only a slight pressure fluctuation propagates, the phenomenon caused by the sudden change of the thermal resistance of the die surface due to the pressure fluctuation cannot be expected. Therefore, it is necessary to amplify the minute vibrations of the molten metal itself due to the longitudinal waves propagating in the molten metal. If the mold surface does not vibrate at all, the mold surface becomes the fixed end. Therefore, due to the superposition of the longitudinal waves propagating in the molten metal and the reflected waves reflected from the mold surface, the molten metal itself does not generate microvibrations on the mold surface. However, when a part of the mold is vibrated as in the present invention, the phases of the incident wave and the reflected wave shift,
Minute vibrations start to occur. Especially the phase is 180-360
When the angle is shifted by °, the minute vibration is amplified by the superposition of the incident wave and the reflected wave. As a result, as described above, in the solidification form of the molten metal, not only the molten metal surface facing the cavity surface of the mold, but also nuclei are generated in the molten metal and solidification proceeds. That is, it becomes a massy-type solidification morphology that produces a fine equiaxed crystal structure. Moreover, hot cracking and segregation hardly occur, and high-quality cast products with high strength and toughness can be obtained. Casting by pulse pressurization is particularly useful when casting relatively thick or large cast products.
【００２８】なお，例えば２０秒のように所定時間，加
圧力をパルス状に加えたら，停止し，雌の金型１を下降
させて型開きし，その時，押出ピン２９を下降させてキ
ャビティ１７ｂ内から鋳込製品も下降させる。鋳込製品
を取出すときは，ボルト１ｂと底部１ａを取って行う。When the pressure is applied in a pulsed manner for a predetermined time such as 20 seconds, the operation is stopped and the female die 1 is lowered to open the die. At that time, the extrusion pin 29 is lowered to move the cavity 17b. Cast products are also lowered from inside. When removing the cast product, the bolt 1b and the bottom 1a are removed.
【００２９】[0029]
【発明の効果】このように，本発明においては，金型の
キャビティ側の表面の一部に撓み板部を設け，撓み板部
の中央部裏側に先端が接している撓み量伝達棒を配し，
撓み量伝達棒の後端面に撓み量計測板を押付けた状態で
配し，金型に取付けた保持具で撓み量計測板の外周部を
支持し，撓み量計測板の裏面に歪ゲージを取付けたの
で，加圧鋳造を行う際に，溶湯に加わっている圧力を常
に容易に正確に計測することができる。しかも，撓み板
部の中央部裏面に接している撓み量伝達棒の先端中央部
を先細形状にしたので，撓み板部に偏荷重が作用して
も，圧力値を常に正確にかつ容易に求めることができ
る。そして，キャビティ内の溶湯に，例えば，数１００
ｋｇ／ｃｍ2 の大きい圧力と小さい圧力が交互に１０〜
１００Ｈｚ程度でパルス状に作用する場合であっても，
特に抵抗が発生する部分もなく，素早く応答するので，
その圧力変動を確実容易に検知することができる。As described above, in the present invention, the bending plate portion is provided on a part of the cavity side surface of the mold, and the bending amount transmitting rod having the tip contacting the back side of the central portion of the bending plate portion is arranged. Then
The bending amount measuring plate is placed on the rear end face of the bending amount transmitting rod in a pressed state, the outer circumference of the bending amount measuring plate is supported by the holder attached to the mold, and the strain gauge is attached to the back surface of the bending amount measuring plate. Therefore, when performing pressure casting, the pressure applied to the molten metal can always be easily and accurately measured. Moreover, the central portion of the tip of the bending amount transmitting rod, which is in contact with the back surface of the central portion of the flexible plate portion, is tapered, so that the pressure value is always accurately and easily obtained even if an eccentric load is applied to the flexible plate portion. be able to. Then, for example, several 100
High pressure of kg / cm 2 and low pressure of 10 to 10
Even if it acts in a pulse shape at about 100 Hz,
Since there is no part where resistance is generated, it responds quickly,
The pressure fluctuation can be detected reliably and easily.
【００３０】また，本発明においては，鋳造用金型のキ
ャビティ側の面に溶湯の圧力変動で振動する薄板状の振
動板部を設けたので，この金型を用いて鋳造する場合
に，パルス加圧を作用させた場合，振動板部が振動する
ので，ごく僅かな圧力変動しか伝播しない部分でも，微
小振動を増幅することができ，その結果，溶湯の凝固形
態は金型のキャビティ表面に面した溶湯表面だけでな
く，溶湯内でも核が発生して凝固が進行し，全体に微細
等軸晶組織を生成するマッシー型の凝固形態になり，熱
間割れも偏析もほとんど発生せず，高強度で靭性を有す
る高品質の鋳込製品が得られる。Further, in the present invention, since the thin plate-shaped vibrating plate portion vibrating due to the pressure fluctuation of the molten metal is provided on the cavity side surface of the casting die, when casting is performed using this die, the pulse is applied. When pressure is applied, the vibrating plate vibrates, so even a portion where only a slight pressure fluctuation propagates can amplify small vibrations, and as a result, the solidified form of the molten metal is on the cavity surface of the mold. Not only on the facing surface of the molten metal, but also inside the molten metal, nucleation occurs and solidification progresses, resulting in a massy type solidification morphology that produces a fine equiaxed crystal structure, with almost no hot cracking or segregation. High quality cast products with high strength and toughness are obtained.
【００３１】なお，溶湯が充填した直後は充分に圧力変
動が伝播されているにもかかわらず，凝固が進行するに
従って，圧力変動の減衰率が大きくなり，充分な圧力変
動が伝播しなくなるような場合でも，高圧力でも，破壊
しない程度の強度を持ち，圧力が減衰した時でも充分に
パルス加圧効果が増幅できる程度に振動するよう，撓み
量で剛性が非線形に変化する振動板部を金型に組込んで
おけば，凝固が進行した時でも，充分にパルス加圧の効
果が発現し，良好な鋳造結果を確実容易に得ることがで
きる。Although the pressure fluctuation is sufficiently propagated immediately after the molten metal is filled, the damping rate of the pressure fluctuation increases as the solidification progresses, and the sufficient pressure fluctuation does not propagate. Even if the pressure is high, the diaphragm has a strength that does not break and vibrates so that the pulse pressurizing effect can be sufficiently amplified even when the pressure is attenuated. If it is incorporated in the mold, the effect of pulse pressurization is fully expressed even when solidification progresses, and good casting results can be obtained reliably and easily.
【図１】本発明の金型内圧力変動計測装置の１実施例を
示す縦断面図で，かつ，図３と図４のＡ部拡大断面図で
ある。FIG. 1 is a vertical sectional view showing an embodiment of a pressure fluctuation measuring device in a mold of the present invention, and is an enlarged sectional view of a portion A in FIGS. 3 and 4.
【図２】従来の装置における好ましくない加圧状態と計
測状態を示す１例を示す縦断面図である。FIG. 2 is a vertical cross-sectional view showing an example of an undesired pressurization state and measurement state in a conventional device.
【図３】本発明の鋳造用金型の１実施例を示す縦断面図
で，注湯時の状態を示す図である。FIG. 3 is a vertical cross-sectional view showing an embodiment of the casting mold of the present invention, showing a state during pouring.
【図４】図３に示す装置の加圧時の状態と加圧力供給装
置部の１実施例を示す縦断面図である。FIG. 4 is a vertical cross-sectional view showing a state of the apparatus shown in FIG. 3 at the time of pressurization and an example of a pressurizing force supply device section.
【図５】本発明において，加圧力をパルス的に作用させ
る場合の１実施例を示す時間−作動油圧力およびストロ
ーク線図である。FIG. 5 is a time-hydraulic oil pressure and stroke diagram showing one embodiment in the case of applying a pressure force in a pulsed manner in the present invention.
１ 金型（雌の金型） ２，１７ｂ キャビティ ３ 撓み板部（振動板部） ４ 金型内圧力変動計測装置 ６ 撓み量伝達棒 ６ａ 先端中央部 ７ 撓み量計測板 ９ ブロック １３ 押え部材 １５ 歪ゲージ １６ 雄金型 ２１ 注湯装置 ２３ アクチュエータ ２４ 溶湯 ２５ 加圧力供給装置 ２６ 供給圧力設定変動装置 ２７ 加圧力変動指示装置 ２９ 押出ピン DESCRIPTION OF SYMBOLS 1 Mold (female mold) 2, 17b Cavity 3 Bending plate part (vibrating plate part) 4 In-mold pressure fluctuation measuring device 6 Bending amount transmitting rod 6a Tip central part 7 Bending amount measuring plate 9 Block 13 Holding member 15 Strain gauge 16 Male mold 21 Pouring device 23 Actuator 24 Molten metal 25 Pressurizing force supplying device 26 Supply pressure setting changing device 27 Pressing force changing indicator 29 Extrusion pin
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成６年５月１７日[Submission date] May 17, 1994
【手続補正２】[Procedure Amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】発明の名称[Name of item to be amended] Title of invention
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【発明の名称】 金型内圧力計測装置および金
型内圧力計測装置を備えた鋳造用金型Patent application title: In-mold pressure measuring device and casting mold equipped with the in-mold pressure measuring device
【手続補正３】[Procedure 3]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】特許請求の範囲[Name of item to be amended] Claims
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【特許請求の範囲】[Claims]
【手続補正４】[Procedure amendment 4]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００１[Correction target item name] 0001
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【０００１】[0001]
【産業上の利用分野】本発明は、例えば、アルミニウム
合金やマグネシウム合金等の軽金属合金を金型を用いて
加圧鋳造する際に有用な金型内圧力計測装置およびこの
装置を備えた鋳造用金型に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-mold pressure measuring device useful for pressure-casting a light metal alloy such as an aluminum alloy or a magnesium alloy, and a casting device equipped with this device. It is about molds.
【手続補正５】[Procedure Amendment 5]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００６[Correction target item name] 0006
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【０００６】[0006]
【実施例】図１は本発明の金型内圧力計測装置４の１実
施例を示す縦断面図である。１は金型の一部、２は金型
１内の溶湯鋳込空間であるキャビティ、３は金型１のキ
ャビティ２側の表面の一部に設けた比較的に薄い円形状
の撓み板部であり、撓み板部３は中心部の比較的に薄い
円形状の第１の薄板部３ａと、その回りのそれよりも幾
分厚い円形状の第２の薄板部３ｂとで形成した。撓み板
部３の後方には、少し深い穴５が後側から設けられてい
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a vertical cross-sectional view showing one embodiment of the in-mold pressure measuring device 4 of the present invention. Reference numeral 1 is a part of the mold, 2 is a cavity which is a molten metal pouring space in the mold 1, and 3 is a relatively thin circular flexible plate portion provided on a part of the surface of the mold 1 on the side of the cavity 2. The flexible plate portion 3 is formed of a relatively thin circular first thin plate portion 3a in the center portion and a circular second thin plate portion 3b around the central thin plate portion 3a. A slightly deep hole 5 is provided in the rear of the flexible plate 3 from the rear side.
【手続補正６】[Procedure correction 6]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１２[Correction target item name] 0012
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１２】金型キャビティ内の溶湯の圧力の作用によ
り、撓み板部３が撓み、それに応じて、撓み量伝達棒６
を介して後方の撓み量計測板７が撓み、その撓み量を歪
ゲ−ジ１５で計測する。そして、公知の演算方法によ
り、金型キャビティ２内の溶湯の圧力を検知する。勿
論、溶湯の圧力が変動した場合は、その変動状態を逐次
検知する。この装置においては、撓み板部３が撓み量伝
達棒６を介して撓み量計測板７に繋がっているので、撓
み量計測板７の歪量は、圧力の大きさに比例して撓む撓
み板部３が歪量と対応している、そして、撓み板部３の
厚みやブロック９と押え部材１３の内径の大きさ等を考
慮して、撓み量計測板７の歪量から撓み板部３に作用し
た圧力を換算して常にすぐに正確に求めることができ
る。換算して得た圧力は、数値として表示したり、グラ
フに表示したりして知ることができ、また、その圧力変
動状態を知ることができる。そして、小さな圧力変動し
か加わらなくても、圧力を計測できる。また、この検知
した圧力を射出装置の圧力制御部分にフィ−ドバックし
て、金型キャビティ２内の溶湯の圧力を所定の値に保ち
得るようにすることもできる。The bending plate portion 3 is bent by the action of the pressure of the molten metal in the mold cavity, and the bending amount transmitting rod 6 is correspondingly bent.
The bending amount measuring plate 7 on the rear side bends via the, and the amount of bending is measured by the strain gauge 15. Then, the pressure of the molten metal in the mold cavity 2 is detected by a known calculation method. Of course, when the pressure of the molten metal fluctuates, the fluctuation state is sequentially detected. In this device, since the bending plate portion 3 is connected to the bending amount measuring plate 7 via the bending amount transmitting rod 6, the bending amount of the bending amount measuring plate 7 is bent in proportion to the magnitude of pressure. The plate portion 3 corresponds to the amount of strain, and in consideration of the thickness of the flexible plate portion 3 and the sizes of the inner diameters of the block 9 and the pressing member 13, etc. The pressure acting on 3 can be converted and immediately obtained accurately. The pressure obtained by the conversion can be known by displaying it as a numerical value or by displaying it in a graph, and the pressure fluctuation state can be known. The pressure can be measured even if only a small pressure fluctuation is applied. Further, the detected pressure can be fed back to the pressure control part of the injection device so that the pressure of the molten metal in the mold cavity 2 can be maintained at a predetermined value.
【手続補正７】[Procedure Amendment 7]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１９[Correction target item name] 0019
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１９】この時、図４に示すように、雄金型１６は
雌の金型１のキャビティ２内に深く入り込んだ状態とな
り、溶湯２４は雄金型１６のキャビティ１７ｂ内に入
り、押圧される。なお、この時、押出ピン２９の外周面
のわずかな隙間からキャビティ１７ｂ内のエアが抜け
る。キャビティ１７ｂ内の溶湯２４は冷却凝固して鋳込
製品となる。ただし、溶湯２４がキャビティ１７ｂ内に
入ったら、直ちに、あるいは、充填が終わる直前から、
アクチュエ−タ２３内の加圧力供給装置２５を作動さ
せ、油圧シリンダ２３ａ内に、例えば、６００ｋｇ／ｃ
ｍ2 の高圧力と、６０ｋｇ／ｃｍ2 のような比較的に低
圧力の作動油を、例えば１０Ｈｚや１００Ｈｚで、パル
ス的に交互に作用させて、凝固する溶湯２４に加圧力を
パルス的に加える。このパルス的な加圧力は前記した金
型内圧力計測装置４により順次計測される。At this time, as shown in FIG. 4, the male die 16 is deeply inserted into the cavity 2 of the female die 1, and the molten metal 24 enters the cavity 17b of the male die 16 and is pressed. It At this time, the air in the cavity 17b escapes from a slight gap on the outer peripheral surface of the push pin 29. The molten metal 24 in the cavity 17b is cooled and solidified into a cast product. However, immediately after the molten metal 24 enters the cavity 17b, or immediately before the filling is completed,
The pressurizing force supply device 25 in the actuator 23 is actuated so that, for example, 600 kg / c in the hydraulic cylinder 23a.
High pressure of m 2 and hydraulic oil of relatively low pressure such as 60 kg / cm 2 are alternately applied in a pulsed manner at, for example, 10 Hz or 100 Hz to apply a pressure force to the molten metal 24 which solidifies in a pulsed manner. Add. This pulse-like pressure is sequentially measured by the in-mold pressure measuring device 4 described above.
【手続補正８】[Procedure Amendment 8]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】図面の簡単な説明[Name of item to be corrected] Brief description of the drawing
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明の金型内圧力計測装置の１実施例を示す
縦断面図で、かつ、図３と図４のＡぶ拡大断面図であ
る。FIG. 1 is a vertical sectional view showing an embodiment of a pressure measuring device in a mold of the present invention, and is an enlarged sectional view of A in FIGS. 3 and 4. FIG.
【図２】従来の装置における好ましくない加圧状態と計
測状態を示す１例を示す縦断面図である。FIG. 2 is a vertical cross-sectional view showing an example of an undesired pressurization state and measurement state in a conventional device.
【図３】本発明の鋳造用金型の１実施例を示す縦断面図
で、注湯時の状態を示す図である。FIG. 3 is a vertical cross-sectional view showing an embodiment of the casting mold of the present invention, showing a state during pouring.
【図４】図３に示す装置の加圧時の状態と加圧力供給装
置部の１実施例を示す縦断面図である。FIG. 4 is a vertical cross-sectional view showing a state of the apparatus shown in FIG. 3 at the time of pressurization and an example of a pressurizing force supply device section.
【図５】本発明において、加圧力をパルス的に作用させ
る場合の１実施例を示す時間−作動油圧力およびストロ
−ク線図である。FIG. 5 is a time-hydraulic oil pressure and stroke diagram showing an embodiment in the case of applying a pressure force in a pulsed manner in the present invention.
【符号の説明】 １ 金型（雌の金型） ２、１７ｂ キャビティ ３ 撓み板部（振動板部） ４ 金型内圧力計測装置 ６ 撓み量伝達棒 ６ａ 先端中央部 ７ 撓み量計測板 ９ ブロック １３ 押え部材 １５ 歪ゲ−ジ １６ 雄金型 ２１ 注湯装置 ２３ アクチュエ−タ ２４ 溶湯 ２５ 加圧力供給装置 ２６ 供給圧力設定変動装置 ２７ 加圧力変動指示装置 ２９ 押出ピン[Explanation of Codes] 1 Mold (female mold) 2, 17b Cavity 3 Bending plate (vibrating plate) 4 Pressure measuring device in mold 6 Bending amount transmitting rod 6a Tip central part 7 Bending amount measuring plate 9 Block 13 Holding member 15 Strain gauge 16 Male mold 21 Pouring device 23 Actuator 24 Molten metal 25 Pressurizing force supply device 26 Supply pressure setting change device 27 Pressurization force change instruction device 29 Extrusion pin
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｇ０１Ｌ 1/00 Ｄ 9/04 １０１ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI technical display location G01L 1/00 D 9/04 101
Claims (2)
板部を設け，撓み板部の中央部裏側に先端が接している
撓み量伝達棒を配し，撓み量伝達棒の後端面に撓み量計
測板を押付けた状態で配し，金型に取付けた保持具で撓
み量計測板の外周部を支持し，撓み量計測板の裏面に歪
ゲージを取付け，かつ，撓み板部の中央部裏面に接して
いる撓み量伝達棒の先端中央部を先細形状にした金型内
圧力変動計測装置。1. A flexure plate is provided on a part of the cavity side surface of a mold, and a flexure amount transmission rod having a tip contacting the back side of the central part of the flexure plate part is provided, and a rear end face of the flexure amount transmission rod. The flexure amount measuring plate is placed in a pressed state, the outer circumference of the flexure amount measuring plate is supported by the holder attached to the mold, the strain gauge is attached to the back surface of the flexure amount measuring plate, and the flexure plate An in-mold pressure fluctuation measuring device in which the central portion of the tip of the deflection transmitting rod in contact with the back surface of the central portion is tapered.
板部を設け，撓み板部の中央部裏側に先端が接している
撓み量伝達棒を配し，撓み量伝達棒の後端面に撓み量計
測板を押付けた状態で配し，金型に取付けた保持具で撓
み量計測板の外周部を支持し，撓み量計測板の裏面に歪
ゲージを取付け，かつ，撓み板部の中央部裏面に接して
いる撓み量伝達棒の先端中央部を先細形状にした金型内
圧力変動計測装置を備えた鋳造用金型。2. A flexure plate portion is provided on a part of the surface of the mold on the cavity side, and a flexure amount transmission rod whose tip is in contact with is arranged on the back side of the central part of the flexure plate portion. The flexure amount measuring plate is placed in a pressed state, the outer circumference of the flexure amount measuring plate is supported by the holder attached to the mold, the strain gauge is attached to the back surface of the flexure amount measuring plate, and the flexure plate A casting mold equipped with an in-mold pressure fluctuation measuring device in which the central part of the tip of a deflection transmitting rod in contact with the back surface of the central part is tapered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27951193A JPH07124734A (en) | 1993-11-09 | 1993-11-09 | Pressure in die measuring unit and casting die having therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27951193A JPH07124734A (en) | 1993-11-09 | 1993-11-09 | Pressure in die measuring unit and casting die having therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07124734A true JPH07124734A (en) | 1995-05-16 |
Family
ID=17612060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27951193A Pending JPH07124734A (en) | 1993-11-09 | 1993-11-09 | Pressure in die measuring unit and casting die having therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07124734A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010249675A (en) * | 2009-04-16 | 2010-11-04 | Nippon Soken Inc | Cylinder pressure detector |
| WO2011099445A1 (en) * | 2010-02-09 | 2011-08-18 | いすゞ自動車株式会社 | Sensor for detecting in-cylinder pressure |
| CN110848105A (en) * | 2019-11-20 | 2020-02-28 | 山东尤科斯石油装备有限公司 | Plunger pump hydraulic end assembly |
-
1993
- 1993-11-09 JP JP27951193A patent/JPH07124734A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010249675A (en) * | 2009-04-16 | 2010-11-04 | Nippon Soken Inc | Cylinder pressure detector |
| WO2011099445A1 (en) * | 2010-02-09 | 2011-08-18 | いすゞ自動車株式会社 | Sensor for detecting in-cylinder pressure |
| JP2011163926A (en) * | 2010-02-09 | 2011-08-25 | Isuzu Motors Ltd | In-tube pressure sensor |
| CN110848105A (en) * | 2019-11-20 | 2020-02-28 | 山东尤科斯石油装备有限公司 | Plunger pump hydraulic end assembly |
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