The quality of china laser pointer

When the low power density and longer exposure time while welding pieces of thin, usually mainly to the melting heat transfer mechanism. On the contrary, is based on deep penetration of the melting mechanism to main. Process characteristics and its influencing factors. The laser input energy density. The method of adjusting the laser energy density: the adjustment of the laser output energy (adjust the excitation voltage). Adjust the spot size (to regulate the exit focal length). Change the energy distribution in the spot (to change the fiber type: the peak-shaped output type - the GI optical fiber, the trapezoidal output type-SI type fiber). The worker should pay attention to self protection during manufacture process of china laser pointer.
Change the width of the radio pulse and waveform. Most metals in the laser exposure, the majority of laser energy reflected from the welding process begins the moment a corresponding increase in beam power. Using pulsed laser seam defended by two arts, you can access arc plate to ensure the quality and consistency of the entire welding segment. When the melt or vaporize the metal surface, the reflection rate is decreased rapidly. The main factors affect the material of the laser beam absorption. Laser absorption rate of the metal materials at room temperature below 20 ℃; when the metal temperature reaches the branded point melting and gasification, the absorption rate increased to 40 ~ 50%. The innovative design of china laser pointer greatly improve the quality of china laser pointer.
When close to the boiling point of the absorption rate can be as high as 90%. DC resistivity of the material. DC resistivity of the material on the laser absorption rate and the material is proportional to the square root of laser He is inversely proportional to the square root. The angle of incidence of the laser beam. The greater the incident angle, the smaller the absorption rate. When the laser perpendicular to the metal surface irradiation, the maximum absorption rate of the metal on the laser. But usually in order to protect the laser exit lens, the need to maintain a certain angle of incidence. The surface state of the village of material. Low reflectivity, the metal surface coated with a thin layer of the whole is a powder, but they must be able to form alloys. Such as rice, gold, silver can cover a thin sharp layer, this time under the same penetration welding the energy required is about the original copper, gold, silver required for a quarter. The package method ofchina laser pointer will be determined in the meeting to be held this afternoon.
Focus and defocus amount. Quality of YAG laser welding device, focusing (spot size), the output optical fiber and the outgoing head of the imaging ratio to ensure that the coaxial accuracy of the optical path through the device itself. Laser emitted focus fall exactly on the location when the work above zero. Defocus amount refers to the focus away from this zero distance. Focus position more than the zero position is called negative defocus (focus into the workpiece internal), and its distance value is negative, the defocus amount. Instead, the focus is less than zero distance value is positive defocus amount. To obtain a larger penetration depth, focus position can be in a position of the workpiece internal negative defocus amount welding. The data in the working instruction of green laser pointer should be referred to.
Welding penetration depth. Pulsed laser welding, mainly by melting of heat transfer of Of metal penetration depth of the laser beam is limited mainly depends on the material on Thermal Conductivity (conductivity temperature coefficient of the penetration depth), rather than the laser power level. Internal structure and electrical schematic diagram of pure water, ion exchange resins, water filters, excitation from the light to protect the lens. Welding quality inspection, and general visual inspection and destructive testing of two methods. Visual inspection and inspection of each project shown in Figure 1. Microscopy (mirror) photo metallographic examination, the need to cut off to extract the weld nugget part and ground corrosion (see Figure 2). The director attach much importance to the safety of the worker in the china laser pointer workshop.