The composition of laser cutting machine cutting head

Part of the cutting head are: spray nozzle, focusing lens and focus on the tracking system. A, the selection of the form of jet nozzle and nozzle size had A great influence on cutting quality. There are three main forms to nozzle: parallel type, ShouLianShi and cone forms. But at present, some institutions abroad application knowledge of aerodynamic, worked out the convergence - - Expanding the nozzle, this type of nozzle used in cutting, can have good cutting characteristics. However, because of the complicated inner chamber, the nozzle technology of processing and fine type is restricted, make its can not be put into industrialization production. B, focusing lens using the energy of laser beam cutting, must put the shot of the original laser beam pass through lens focus, to form the high energy density of light. According to the theory of gaussian optical focus in high power density. The longer the focal length lens, focus spot, the greater the power density is lower, but the depth of focus ( Depth of focus is to point to focus on both sides of the diameter change for 5% of the distance between two light, also known as effective in cutting cutting range), , large permissibility of operation. 5 inch lens range greater than 3 inches lens. That is why the telephoto lens suitable for thick plate cutting, and the spacing of tracking system stability requirement is low, but the requirements of high output power. Short focal lens, on the contrary, only suitable for the following D3 sheet cutting, short distance between stability of coke on the tracking system has the strict request, but it demands for the output power of the laser can be greatly reduced. C, focus tracking system to laser cutting machine focus tracking system is generally composed of focusing on the cutting head and tracking sensor system.