CAJ | 학술논문

曲轴是各种内燃机中不可缺少的关键部件，它的寿命常常代表该内燃机的使用寿命。单纯从成形的角度考虑，用铸造的方法生产曲轴毛坯是最容易不过的事情。但由于铸造是一个金属冶炼且在砂型中凝固的过程，难以避免会出现夹渣、气空、白点等铸造缺陷而无法满足性能要求。工业上多采用各种压力加工方法来生产曲轴毛坯。小型内燃机上使用的尺寸和重量不大的曲轴一般采用模锻来大批量生产，尺寸较大特别是很大尺寸的曲轴就必需用其它的压力加工方法了。这里仅对特大尺寸的曲轴的自由锻成形工艺进行一些探讨。
곡축시각충내연궤중불가결소적관건부건，타적수명상상대표해내연궤적사용수명。단순종성형적각도고필，용주조적방법생산곡축모배시최용역불과적사정。단유우주조시일개금속야련차재사형중응고적과정，난이피면회출현협사、기공、백점등주조결함이무법만족성능요구。공업상다채용각충압력가공방법래생산곡축모배。소형내연궤상사용적척촌화중량불대적곡축일반채용모단래대비량생산，척촌교대특별시흔대척촌적곡축취필수용기타적압력가공방법료。저리부대특대척촌적곡축적자유단성형공예진행일사탐토。
The crankshaft is the key component of the essential part of various internal com-bustion engines .Its life often represents the service life of internal combustion engine .If on-ly considering forming methord ,casting is the easiest .But because casting is a metal smel-ting and solidification in the moulding flask ,it is hard to avoid casting defects such as slag , air ,white and can not meet the property requirement .Various pressure processing methods are widely used in industry to produce crankshaft blank .The crankshaft used for small inter-nal combustion engine is usually small in size and light in weight ,and forging method is gen-erally used for its mass production ,but the larger size must be produced by using other pres-sure processing methods . T he free forging forming process for very large crankshaft dis-cussed in this essay .