The difference between welding machine and welding machine

Welding machine according to the material is mainly divided into: plastic welding machine and metal welding machine two. The main technologies applied are: ultrasonic, high frequency, plasma, electric heating, rotary and so on.

The plastic welding machine is used for welding polyethylene, polypropylene, polypropylene, nylon and other thermoplastic engineering plastic sheets or products. During operation, the plastic welding rod is melted and sprayed, and the welded workpiece is fused with it and bonded. In the welding and maintenance of plastic equipment, plastic floor laying, plastic pipe connection, plastic bottle sealing and other operations are widely used.

Metal welding machine is mainly for welding metal materials.
automatic welding machine:

The solar cell automatic welding machine (see the figure below) can automatically and continuously weld the front and back sides of the battery according to the set requirements to form a battery string. During welding, the welding belt is automatically fed and cut off, and the battery string is automatically received after welding. Welding methods include infrared lamp welding and high frequency electromagnetic induction welding.

Automatic string welding machine and automatic welding machine compared with manual welding has the following advantages:

① The welding speed is fast, the quality is consistent, the surface is beautiful, and there is no uneven solder welding by hand. Equipment welding can avoid the influence of various human factors during manual welding, such as the influence of operator proficiency, the influence of physical condition, the shadow of emotion, etc., so as to ensure the consistency and reliability of welding.

The number of operators and inspectors can be reduced, and the management difficulty and product cost can be reduced. Now the labor cost is increasing year by year, and the annual recruitment is the most troublesome thing for the boss. The automatic welding machine can greatly reduce the number of employees.

The welding reliability of the string welding machine is much greater than that of manual welding. Poor welding is an important cause of early failure of components. The design life of solar photovoltaic modules is 25 years, and the modules are usually installed outdoors, and they have to withstand temperature changes of about 30°C every day, plus seasonal changes, the temperature changes are even greater. Since the base material of the welding belt is pure copper, the expansion coefficient of copper is about six times that of silicon (battery). This difference means that as long as there is a temperature change, the welding of the welding belt and the battery will be stressed. Therefore, poor welding will cause the power of the component to decrease, and in severe cases, the component will fail. There are many reasons for bad welding caused by manual welding, such as the temperature of the soldering station, the coating of the flux, the temperature of the electric soldering iron, the proficiency of the personnel, etc. Some aspects can be solved through effective management, while some situations cannot be completely controlled.
ultrasonic welding machine

When the ultrasonic effect on the thermoplastic plastic contact surface, will produce tens of thousands of times per second high-frequency vibration, this high-frequency vibration reaches a certain amplitude, through the upper weldment to the ultrasonic energy transmitted to the welding area, because the welding area that is two The acoustic resistance at the welding interface is large, so it will produce local high temperature. Due to the poor thermal conductivity of the plastic, it cannot be distributed in time for a while and gathers in the welding area, resulting in the rapid melting of the contact surface of the two plastics, and after a certain pressure, it is integrated into one. When the ultrasonic stops acting, let the pressure continue for a few seconds to solidify and form, so that a strong molecular chain is formed to achieve the purpose of welding, and the welding strength can be close to the strength of the raw material. Ultrasonic plastic welding depends on the amplitude of the transducer welding head, the pressure and welding time and other three factors, welding time and welding head pressure can be adjusted, the amplitude is determined by the transducer and horn. The interaction of these three quantities has a suitable value. When the energy exceeds the suitable value, the melting amount of the plastic is large and the welding is easy to deform. If the energy is small, it is not easy to weld firmly, and the added pressure cannot be too large. This optimum pressure is the product of the side length of the welded part and the optimum pressure per 1mm of the edge.
laser welding machine:

The laser welding machine uses high-energy laser pulses to heat the material locally in a small area, and the energy of the laser radiation is diffused to the inside of the material through heat conduction, and the material is melted to form a specific molten pool. It is a new type of welding method. Laser welding is mainly aimed at the welding of thin-walled materials and precision parts. It can realize spot welding, butt welding, lap welding, seal welding, etc., with high aspect ratio, small weld width, small heat affected zone, small deformation, fast welding speed, smooth and beautiful weld seam, no need or simple treatment after welding, high weld quality, no pores, and precise control, the focus spot is small, the positioning accuracy is high, and it is easy to realize automation.

Folding welding characteristics

It belongs to melting welding, which uses laser beam as energy source and impacts on weldment joint.

The laser beam may be guided by a planar optical element, such as a mirror, and then the beam is projected onto the weld with a reflective focusing element or lens.

Laser welding machine is a non-contact welding, the operation process does not need to be pressurized, but the use of inert gas to prevent oxidation of the molten pool, filler metal occasionally used.

Laser welding can be combined with MIG welding to achieve large penetration welding, while the heat input is greatly reduced compared to MIG welding.