When using laser cutting machine, the evaluation of its processing quality mainly includes four aspects.

　　切割面光滑、紋路少、沒有脆性斷裂

　　Smooth cutting surface, less grain, no brittle fracture

　　激光高溫切割板材時，熔融材料的痕跡不會出現于垂直激光束下方的切口里，反而會在激光束偏后處噴出來。結果，彎曲的紋路在切割邊緣形成了，紋路緊緊跟隨移動的激光束，為了修正這個問題，在切割加工結尾時降低進給速率，可以大大紋路的行成；

　　When laser cutting plate at high temperature, the trace of molten material will not appear in the incision under the vertical laser beam, but will eject at the back of the laser beam. As a result, the curved lines are formed at the cutting edge, and the lines follow the moving laser beam tightly. To correct this problem, reducing the feed rate at the end of the cutting process can greatly eliminate the lines.

　　2切縫寬度窄(這主要與激光束光斑直徑大小有關,取決于激光管的好壞）

　　2. The width of the slit is narrow (this is mainly related to the diameter of the laser beam spot, depending on the quality of the laser tube)

　　切口寬度一般來說不影響切割質量，僅僅在部件內部形成特別精密的輪廓時，切割寬度才有重要影響，這是因為切割寬度決定了輪廓的小內經，當板材厚度增加時，切割寬度也隨之增加。所以想要保證同等高精度，不管切口寬度多大，工件在激光切割機的加工區域應該是恒定的；

　　Generally speaking, cutting width does not affect cutting quality. Only when a particularly precise contour is formed inside the parts, cutting width has an important effect. This is because cutting width determines the leading inner meridian of the contour. When the thickness of the sheet increases, cutting width also increases. Therefore, in order to ensure the same high accuracy, no matter how wide the cut width, the workpiece in the laser cutting machine processing area should be constant;

　　切縫垂直度好，熱影響區域小

　　Verticality of slit is good and heat affected area is small.

　　當加工材料的厚度超過18mm時，切割邊緣的垂直度是非常重要的；遠離焦點時，激光束變得發散，根據焦點的位置，切割朝著頂部或者底部變寬。切割邊緣偏離垂直線百分之幾毫米，邊緣越垂直，切割質量越高；

　　When the thickness of the material exceeds 18 mm, the verticality of the cutting edge is very important; when away from the focus, the laser beam diverges, and the cutting is widened toward the top or bottom according to the position of the focus. The cutting edge deviates from the vertical line by several millimeters. The more vertical the edge is, the higher the cutting quality is.

　　切割材料熱影響

　　Thermal Effect of Cutting Material

　　作為熱切割加工應用設備，在使用過程中勢必會對材料造成熱影響，其體現主要包括三個方面：a.熱影響區域；b.凹陷和腐蝕；c.材料變形

　　As an application equipment of thermal cutting, it will inevitably cause thermal impact on materials in the process of use, which mainly includes three aspects: A. heat affected area; B. depression and corrosion; C. material deformation.

　　其中熱影響區域指激光切割中，沿著切口附近的區域被加熱。同時，材料本身結構發生變化。例如，一些材料會發生硬化現象。熱影響區域指的是內部結構因高溫而發生變化的區域性的變化；而凹陷和腐蝕是對切割邊緣的表面有不利影響，影響激光切割機的外觀。他們出現在一般本應避免的切割誤差；如果切割使得部件急劇加熱，它就會變形。精細加工中這一點尤為重要，因為這里的輪廓和連接片通常只有十分之幾毫米寬。控制激光功率以及使用短激光脈沖可以減少部件變熱，避免變形。

　　At the same time, the structure of the material itself has changed. For example, hardening occurs in some materials. The heat affected zone refers to the regional change of internal structure due to high temperature, while the depression and corrosion have adverse effects on the surface of cutting edge and affect the appearance of laser cutting machine. They occur in cutting errors that should normally be avoided; if cutting causes parts to heat sharply after taking the lead, it will deform. This is particularly important in fine processing, where the contours and joints are usually only a few tenths of a millimeter wide. The control of laser power and the use of short laser pulses can reduce the heating of components and avoid deformation.