常州亿创钣金加工厂专业从事精密钣金加工、激光切割加工为主的钣金加工型厂家

常州亿创钣金加工厂

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钣金加工的主要工艺方法是什么?

2018-05-31 21:10:30 常州亿创钣金加工厂 阅读

 所谓钣金加工,其实指的是一种对不同金属材料所采用的一种加工方法,使其满足使用要求。一般在进行钣金加工的时候,针对于薄板、薄壁型材和薄壁管材等金属毛料施以一定的作用力,使其发生塑性变形或剪断,从而成为具有预期形状和性能的零件。

   具体来讲,一般采用钣金加工工艺所制得的零件具有这样的性能特点:尺寸大、刚度小、外形复杂。目前钣金加工零件主要可以分为三种类型:第一种就是具有气动力外形的零件,主要包括有飞机机身、机翼、尾翼和进气道的蒙皮,导弹弹身、舵面的蒙皮,火箭发动机的燃烧室和喷管等。

   第二种的钣金加工零件则主要指的是一些骨架零件,比如纵向、横向和斜向构件,如梁、桁条、隔框、翼肋等。第三种则指的是一些内装零件,比如燃料、操纵、通信等系统以及生活服务设施中的各种钣金加工件,如油箱、各种导管、支架、座椅等。这些不同的零件在制作的过程中所采用的加工工艺方法也是不同的。

   事实上,现如今钣金加工一些零部件的时候,不仅会应用到机械制造中通用的各种冷冲压方法,同时还会采用一些其他的成形方法。比如橡皮液压成形,主要指的是向装于容框中的橡皮胎内充高压液体,使之膨胀,从而推动毛料按照模胎的形状形成零件。

   还有另外一种的成型工艺方法叫做拉弯成形,在采用这种工艺方法来加工钣金加工零件的时候,主要是先把型材毛料沿长度方向拉伸至屈服极限,然后保持拉力并使毛料按拉弯模的型面弯曲成形。这种工艺方法能够提高零件的成形准确度。

The so-called sheet metal processing, in fact, refers to a different metal material used in a processing method, so that it meets the use requirements. In the process of sheet metal processing, a certain force is applied to the metal material such as thin plate, thin wall section and thin wall tube, so that it can be plastic deformation or cut, so as to become the part with the expected shape and performance.

To be specific, the parts made by sheet metal processing technology have such characteristics: large size, small rigidity and complex shape. At present, the main parts of sheet metal processing can be divided into three types: the first is the parts with aerodynamic shape, including the skin of the aircraft fuselage, the wing, the tail and the inlet, the missile body, the skin of the rudder, the combustion chamber and the nozzle of the rocket engine.

The second kind of sheet metal processing part mainly refers to some skeleton parts, such as longitudinal, transverse and oblique components, such as beams, stringer, frame, rib and so on. The third refers to a number of inner parts, such as fuel, manipulation, communication systems, and all kinds of sheet metal parts in life service facilities, such as oil tanks, various ducts, stents, seats and so on. These different parts in the process of making the processing methods are also different.

In fact, at present, when the sheet metal parts are processed, it will not only apply to all kinds of cold stamping methods in mechanical manufacturing, but also some other forming methods. For example, the rubber hydroforming is mainly meant to fill a rubber tire with a high pressure liquid in the box, so that it can expand and promote the formation of the parts according to the shape of the mold.

Another kind of molding process is called bending forming. When this process is used to process the sheet metal parts, the main material is to stretch the material in the length direction to the yield limit, and then keep the tension and make the material bend according to the surface of the drawing die. This process can improve the accuracy of parts forming.



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