钣金加工制造过程的原材料是轧制过程的输出，通常情况下，金属片是作为标准尺寸的扁平矩形片出售的，如果薄片很长，则可能是卷状。因此，任何钣金工艺的第一步都是切割正确的形状，并从较大的工作表上选择“空白”。钣金加工是许多工业的重要过程，这些工业是家用电器（冰箱，洗衣机，烘干机，吸尘器等），电子产品（DVD和CD播放器，音响，收音机等）的最大制造商之一，放大器等），玩具和个人电脑。这些产品中的大多数具有通过切割和弯曲金属板制成的金属外壳。我们看一些基本的钣金切割和成形工艺。

The raw material used in sheet metal manufacturing is the output of the rolling process. Normally, sheets are sold as flat rectangular sheets of standard size. If the sheets are long, they may be rolled. Therefore, the first step in any sheet metal process is to cut the correct shape and select the "blank" from the larger worksheet. Sheet metal processing is an important process in many industries, including household appliances (refrigerators, washing machines, dryers, vacuum cleaners, etc.), electronic products (DVD and CD players, audio, radio, etc.), toys and personal computers. Most of these products have metal shells made by cutting and bending metal plates. Let's look at some basic sheet metal cutting and forming processes.

精密钣金加工中剪切与使用剪刀剪切一张纸的过程相似，但是，使用的机器有点不同，有两种典型的用于切割金属板的机器-第一种是剪切机，它有一个长刀片，用于切割直线；它被用来将长片金属切成较小的片材。这种操作与剪纸机的操作类似：金属片保持在硬化模具的顶部，剪切刀片向下切割，通常由电动或液压冲头驱动。

Precision sheet metal cutting is similar to the process of cutting a piece of paper with scissors, but the machines used are somewhat different. There are two typical machines for cutting sheets of metal - the first is a shearing machine, which has a long blade for cutting straight lines; it is used to cut long pieces of metal into smaller pieces. The operation is similar to that of a paper-cut machine: the sheet metal is kept at the top of the hardened die, and the cutting blade is cut downward, usually driven by an electric or hydraulic punch.

另一个金属板冲孔机-切割工具是一个冲床，一块硬工具钢，它是冲压在板上切开一个洞。冲头是一个转塔冲床-转台是一个旋转刀架，可以容纳几十个不同形状和大小的冲模，典型的形状是矩形和圆形的。通过一系列的冲压，可以切出长槽。一个典型的冲孔操作类似于您可能已经用来打孔来将纸张夹在三环活页夹中的打孔纸的打孔操作。

Another sheet metal punch - cutting tool is a punch, a piece of hard tool steel, it is punched on the board to cut a hole. The punch is a turret punch - turntable is a rotating tool holder, can accommodate dozens of different shapes and sizes of punches, the typical shape is rectangular and circular. Through a series of punching, long slots can be cut out. A typical punching operation is similar to a punching operation that you might have used to punch paper into a three-ring binder.