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  • 锻件的毛坯成形方法有哪些选择?
  • 本站编辑:杭州崇贤重型机械有限公司发布日期:2021-06-25 16:29 浏览次数:
锻件2
锻件的使用要求决定了毛坯的形状特点,各种不同的使用要求和形状特点,形成了相应的毛坯成形工艺要求。锻造厂在生产锻件时,主要是根据锻件的使用要求具体对其形状、尺寸、加工精度、表面粗糙度等外部质量和对其化学成分、金属组织、力学性能、物理性能和化学性能等内部质量的要求上。锻造厂对于不同锻件的使用要求,必须考虑锻件材料的锻造工艺性能来确定采用何种毛坯成形方法。
The use requirement of forging determines the shape characteristics of blank, various use requirements and shape characteristics, forming the corresponding blank forming process requirements. When forging the forgings, the forgings are mainly based on the requirements of the external quality, such as the shape, size, machining precision, surface roughness, and the internal quality of its chemical composition, metal structure, mechanical properties, physical and chemical properties, according to the requirements of the use of forgings. Forging factories must consider the forging process performance of forging materials to determine the blank forming method for different forgings.
锻造厂在毛坯成形方案的选择中,还有考虑适应性原则。既根据锻件的结构形状、外形尺寸和工作条件要求,选择适应的毛坯方案。例如,对阶梯轴锻件,当各个阶梯直径相差不大时,可用棒料;若相差较大,则宜采用锻造毛坯。形状复杂和薄壁的锻件,一般不应采用金属型铸造;尺寸较大的毛坯,通常不采用模锻、压力铸造和熔模铸造,多少采用自由锻等方法制坯。
In the selection of blank forming program, the forging factory also considers the adaptability principle. According to the structure, shape, size and working conditions of the forgings, a suitable blank scheme is selected. For example, when the diameter of the stepped shaft is small, the bar material can be used when the diameter of each step is small. If the difference is large, forging blanks should be adopted. In general, metal type casting should not be used for forgings with complex shape and thin wall. The larger size blank is usually not made of die forging, pressure casting and melt casting, and the free forging is used to make the blank.
锻造是在固态金属在压力下塑性变形的成形方法,也是锻造厂中长见的,要求金属的塑性较好、变形抗力小。锻造方法适用于制造受力较大、组织致密、质量均匀的锻件,如转轴、齿轮、曲轴、和筒类等。自由锻锻造工装简单、准备周期短,但产品形状简单,是单件生产和大型锻件的锻造方法;胎模锻是在自由的设备上采用胎膜进行锻造的方法,可锻造较为复杂、中小坯料的中小型锻件、模锻的锻件可较复杂,材料利用率和生产率高于自由锻,但只能锻造批量较大的中小型锻件。
Forging is a forming method for plastic deformation of solid metals under pressure, and is also seen in forging factories. It requires better plasticity and less resistance to deformation. The forging method is suitable for manufacturing forgings, such as shafts, gears, crankshafts and canister, which are of high force, compact structure and uniform quality. The free forging and forging is simple and short preparation period, but the product is simple in shape, and it is a forging method of single piece production and large forgings. Die forging is a method of forging with a membrane on free equipment. It can be forged more complex, medium and small forgings of medium and small billets, forging parts of die forging are more complex, material utilization and birth. The yield is higher than that of free forging, but it can only forge large volume small and medium-sized forgings.