The data in the working instruction of green laser pointer

Workshop management of green laser pointer is getting more and more important in enhancing quality of green laser pointer . Therefore, brazing is a solid phase and liquid phase welding method. Brazing heating temperature is low, the base metal does not melt, but also without pressure. However, before welding must take certain measures to clear the welding surface of the oil, dust, oxide film. This is a good wettability to the workpiece, an important guarantee to ensure joint quality. Solder liquidus above 450 ℃ and the humidity is lower than the melting point of base metal, called brazing; less than 450 ℃, known as soft soldering. According to different methods of heat or heat brazing can be divided into: flame brazing, induction brazing, furnace brazing, dip brazing, resistance brazing, etc. When brazing temperature is relatively low due to heating, so the less impact the performance of the workpiece material, the stress and deformation weldment also smaller. However, the strength of brazed joints is generally low, heat capacity is poor. The self inspection of led flash light should be carried out to confirm whether there is any problem.
Brazing can be used for welding carbon steel, stainless steel, high temperature alloys, aluminum, copper and other metal materials, you can connect dissimilar metals, metal and nonmetal. Not suitable for welding or at room temperature under load of the joint work, for precision, miniature and complex multi-brazing seam welding is especially useful. These welding methods are different levels of specialized welding method, its scope is narrow. Including the resistance of heat energy electroslag welding, high frequency welding; to chemical energy for welding gas welding, pressure welding, explosion welding; to mechanical energy for welding friction welding, cold welding, ultrasonic welding, diffusion welding. As mentioned earlier, electroslag welding slag resistance heat is the energy of the welding method. Welding process in the vertical welding position, and in the end by the two sides of the workpiece to form water-cooled copper block assembly within the gap. Slag welding current through the use of resistance heat generated will melt the end of the workpiece. When used according to the welding electrode shape, electroslag welding wire is divided into very electroslag welding, electroslag welding and melting polar plates mouth electroslag welding. Electroslag welding of the advantages are: weldable workpiece thickness (from 30mm to greater than 1000mm), the production rate. Used in cross-section butt joints and T joints welded. The factory inspection and acceptance personnel should sign the report of green laser pointer if green laser pointer is qualified.
Electroslag welding can be used for a variety of welding steel structures can also be used for welding castings. Electroslag welding heads are slow due to heating and cooling, heat affected zone width, coarse microstructure, toughness, so welding is generally required to be normalized after treatment. Frequency resistance welding is a solid with heat energy. Welding using high-frequency current in the resistance heat generated within the workpiece so that the workpiece is heated to melt the welding zone or near the surface of the plastic state, then apply (or not applied) forging force to achieve a combination of metal. Therefore, it is a solid-phase resistance welding method. High-frequency welding parts according to high-frequency current generated in the heat of welding can be divided into contact with high frequency and high frequency induction welding. Exposure to high-frequency welding, high frequency current through mechanical contact with the workpiece incoming workpiece. High frequency induction welding, high frequency induction loop current through the workpiece external coupling and induced current in the workpiece. Strong high-frequency welding is specialized welding method, according to the product is equipped with special equipment. Production rate, welding speed up to 30m/min. When the tube is mainly used for manufacture of longitudinal seam or spiral seam welding. The company has to accomplish all the oversea orders of green laser pointer this month.
Welding with a gas flame to heat welding method. The most widely used is acetylene gas as fuel oxygen - acetylene flame. As the device to make operation simple and convenient, but the heating rate and low productivity gas welding, large heat-affected zone, and easily lead to a larger deformation. Welding can be used for a lot of black metal, nonferrous metal and alloy welding. Generally applicable to a single piece of sheet metal repair and welding. Pressure welding and gas welding, as is the gas pressure welding flame as heat source. Butt welding the two ends of the workpiece is heated to a certain temperature, then put enough pressure to get a solid connection. Is a solid-phase welding. Pressure welding without filler metal, welding and steel used in rail welding. Explosive welding is the chemical reaction heat for the energy of another solid phase welding method. But it is the use of explosives to achieve the energy generated by the metal connections. Role in the blast wave, the two pieces of metal in less than one second of time can be accelerated impact the formation of metal combination. In a variety of welding methods, explosion welding of dissimilar metals can be welded to the widest range of combinations. Explosion welding can be used on the metallurgy of the two incompatible for a variety of transition metal welded joints. Explosive welding used for a large flat surface area covered, is an efficient way to fabricate composite panels. The data in the working instruction of green laser pointer should be referred to.
Friction welding is a mechanical energy is the energy of the solid-phase welding. It is the use of mechanical friction between two surfaces of the heat generated to achieve the metal connection. Concentrated in the heat of friction welding joints, and are therefore narrow heat-affected zone. Pressure between the two surfaces to be, in most cases is increasing pressure in the heating is terminated, the hot metal by forging and combined with the surface normal is not melting. Friction welding productivity is higher, in principle, almost all capable of forging the metal can be friction welding. Friction welding of dissimilar metals can also be used for welding. To apply to a circular cross-section of 100mm diameter workpiece. Ultrasonic welding is a kind of mechanical energy as the energy of the solid-phase welding method. Ultrasonic welding, the welding workpiece at a lower static pressure, issued by the sound of very high frequency vibration can produce strong joints and crack friction welding temperature and heated to form a combination. Ultrasonic welding can be used for most welding between metals, to achieve the metal, and metal and nonmetal dissimilar metal weld between. Applied to wire, foil, or 2 ~ 3mm sheet metal joints following repeated production. The shoe for the worker in the green laser pointer workshop is specially made.