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前言铸钢件冒口尺寸的确定,通常采用比例法和模数法。比例法是根据铸件热节园直径和被补缩部分的截面形状或凝固收缩重量,查表求得冒口尺寸,模数法是根据铸件被补缩部分的模数和冒口补缩范围内的铸件模数来确定冒口尺寸。这两种方法都离不开繁琐的计算,修造企业产品种类繁杂,而批量一般不大,甚至是单件生产,更需要一种简捷的方法来计算冒口尺寸,作者以凝固模数为理论依据,对多年来
Preface Steel pieces riser size to determine, usually using the ratio method and modulus method. The proportion method is based on the diameter of the castings and the diameter of the section of the section to be shrunk or the shrinkage weight of the frozen section. The size of the riser is determined by the look-up table. The modulus method is based on the modulus of the shrunk part Of the casting module to determine the riser size. These two methods are inseparable from the cumbersome calculation, building a variety of business products, and the bulk is generally small, or even a single production, but also need a simple method to calculate riser size, the author of the theory of solidification modulus Basis, for many years