鑄件型體與模具常數驗證之研究

The Study of Validation between the Shape factor and Mold Constant

許富淵(Fu-Yuan Hsu) ； 洪啟銘(Chi-Ming Hung) ； 馮玉麟(Yu-Lin Feng)

《鑄造工程學刊》 48卷2期 (2022/12) Pp. 11-24

摘要

提出新的“鑄件型體分析技術（CSAT）”，分析複雜鑄件型體之最終凝固時間，以及預測所需要冒口大小。建立型體分析技術與冒口大小預測之演算公式及方法準則，並且進行公式準則之模擬及鑄造實驗驗證。應用所建立的複雜型體的形狀係數與凝固模數中模具常數之間的關聯，來預測該鑄件型體的凝固時間，以及所需冒口體積大小。所開發的球墨鑄鐵之型體與凝固時間關係式，成功驗證四種不同大小同一個型體的煞車鉗體鑄件，其分別所需要之冒口大小。

關鍵字

凝固時間 ； 形狀係數 ； 模具常數 ； 冒口設計

並列摘要

A so-called "casting shape analyzing technique (CSAT)" was developed in this study for predicting the solidification time and the feeder size required for castings with complicated shapes. In this technique, the rules and the calculation equations for predicting an accurate feeder size were established and they were validated by the modeling and casting experiments. For casting with complicated shapes, the relationship between the shape factor and the mold constant was constructed. Using this linear equation, both the solidification time and the required feeder size could be calculated for an arbitrary shape of a casting. Four ductile caliper castings with the same geometric shape were successfully validated. This technique accurately predicted the required feeder size respectively for these caliper castings.

並列關鍵字

solidification time ； shape factor ； mold constant ； feeder design

參考文獻

C. Schwarz, Mathematical Treatmetn of Cooling and Solidification of Molten Metals, Archiv für das Eisenhüttenwesen, 1931, 139-148, 177-191.

N. Chvorinov, Theory of Casting Solidification, Giesserei, 1940, 27, 177-186, 201-208, 222-225.

N. Chvorinov, Solving Feeders and Shrinkheads, International Foundry Congress, Prague, 1963.

G. Halbert, Elements of a Mathematical Theory of Founding, H. Vaillant Carmanne, Liege, 1945.

W.S. Pellini, Factors which Determine Riser Adequancy and Feeding Range, AFS Transactions, 1953, 61-80.