Failure often occurs in the use of 金型, 実際の観点から, いくつかの故障モードに焦点を当てます. 5つの主なタイプがあります:
- 塑性変形の失敗
主な理由は、金型材料の強度レベルが高くないことです; または熱処理プロセスが正しくありません, 鋼の最高の強度と靭性を達成できない; ダイの不適切な使用により局所的な過負荷が発生する; for hot-working mold softening at high temperature will also lead to mold thermoplastic deformation failure. Deformation failure can lead to deformation of the mold and ultimately affect the quality of the forging.
金型製作
- 2.Moldswear failure
The basic reason for the failure of the mold is the friction between the mold and the billet. But the specific form of wear and the wear process are related to many factors, such as the pressure, 温度, deformation speed and lubrication condition of the mold in the working process. For hot working mold, the wear resistance decreases due to the softening of cavity surface by high temperature, and the oxide scale itself plays an abrasive role, which determines that the wear process is more complex. The wear failure of the mold mainly results in the wear of the forging mold and the accuracy of the forging.
- Fatigue failure of molds
The ultimate cause of fatigue failure is the stress concentration and cyclic load. Although the load on the mold is sometimes significantly lower than its yield strength, due to local stress concentration, under low load, microcracks still form at the stress concentration. The dies are usually in high strength and low plasticity. When the micro-cracks are formed, the micro-cracks are easy to propagate and ultimately lead to fatigue fracture under the cyclic loading of the dies.
- Cold and hot fatigue failure of molds
For the hot working mold, the surface temperature of the mold often rises to 600 〜 900 C because of the interaction with the hot blank. In order not to reduce the strength of the mold, the mold must be sprayed with a coolant to cool it down. This cycle is a process of rapid cooling and rapid heating on the surface of the mold, and a considerable cyclic thermal stress is accumulated on the surface of the mold. The stress is finally released in the form of cold and hot fatigue, forming cold and hot fatigue cracks. As for high temperature oxidation, corrosion of coolant and friction between mould and high temperature billet, the process of cold and hot fatigue is accelerated.
- Failure under the influence of comprehensive factors
The working conditions of the mold are intricate, so the occurrence of damage events occur from time to time. Once the damage is caused, they may promote each other, and ultimately accelerate the failure of the mold.
JasonMould Industrial Company Limited, に設立されました 2010, 中国の大手射出成形メーカーです. JasonMould は、家電製品のプラスチック金型の製造を専門としています。, 医療機器, 電子機器, 安全装置および監視システム.
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会社名: JasonMould Industrial Company Limited
住所: 竜崗村,Long西町,博羅県,恵州市,広東省, 中国
電話: 86-752-6682869
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