Today is an era of rapid development of science and technology, the traditional technology gradually become modern technology, robot from science fiction went to the real life, the industrial field for the earliest concept proposed for robot with servo technology to control the robot joints, the robot action is taught by the operator, the robot can achieve the action in accordance with the requirements of operation. This is the current so-called teaching operation. This kind of control is used almost all of today's robots. The flexible mechanical arm can act according to the operator's request at will. It can also perform remote control, pre programmed and other automatic control functions when it can replace human hands. Industrial robots are widely used in the field of laser cladding.
Principle, characteristics and mode of HANS GS laser cladding equipment
Laser cladding is used as additive in different coating materials are placed on the surface of the substrate cladding object selection, and then by the laser irradiation and a thin layer on the substrate surface and melting and rapid solidification formed after dilution is very low, the surface metallurgical bonding of the coating and the substrate, so as to achieve significantly improved resistance the corrosion and wear resistance, high temperature resistance, oxidation resistance and electrical characteristics of the part process on the surface of the base.

The purpose of the surface modification or repair of the workpiece is to meet the requirements of the specific properties of the surface of the material, and to save the unnecessary consumption of a large number of valuable elements. Current use of laser cladding, which is mainly applied to several aspects of material surface modification, such as gas turbine blades, roller, roller, gear and so on, in order to increase its performance; surface repair products, such as rotor, drill, according to statistics the repair costs to reset the price 1/5. But also shorten the maintenance time, solve the key components to solve large enterprises of complete sets of major equipment continuous and reliable operation of rapid repair problems; also by laser cladding technology in mold surface covered with a layer of super abrasion and corrosion resistant alloy, can greatly improve the service life.
At present, the widely used laser cladding materials are as follows: nickel base, cobalt base, iron base alloy, tungsten carbide composite and so on. Among them, nickel based materials are used most, and they are cheaper than cobalt based materials. Compared with the traditional technology of surfacing, electroplating, spraying and gas phase deposition, laser cladding has the following advantages.

(1) the cooling rate is fast and the process of rapid solidification makes the workpiece easy to obtain the new phase, such as non steady state and amorphous state, which can not be obtained by the fine crystal structure or the equilibrium state.

(2) the coating dilution rate is low, which is combined with the metallurgical bonding or interface diffusion of the processed parts. By adjusting the parameters of the laser process power, spot size and focal length, a good coating can be obtained, and the composition and dilution are controllable.

(3) the heat distortion is smaller, and the deformation can be controlled and reduced to the assembly tolerance of the parts when the high power density rapid cladding is used.

(4) powder selection hardly requires any restrictions. It can be applied to any kind of powder material according to process requirements, especially for melting alloy with high melting point on the surface of low melting point metal.

(5) the selection of area cladding can reduce the consumption of materials and improve the ratio of performance and price.

(6) the laser beam can clad the unapproachable region, which is mainly to ensure that the spot and powder can be irradiated to the area.

(7) the thickness range of the cladding layer is large and can be repeated and repeated cladding to the same part.

The main parameters of HANS GS laser cladding are laser power, laser spot diameter, speed of cladding, spot defocus, powder feeding speed, scanning speed, preheating temperature and so on. These parameters have great influence on the dilution rate of the cladding layer, the surface roughness, the crack and the compactness of the cladding parts. It is a very complicated process that each parameter affects each other and matches each other. Therefore, a reasonable control method must be adopted to control these parameters in the permitted range of laser cladding process. At the same time, the repair work is a non - standard action, which is different from the batch product on the production line. The location of damage is mostly random, even often wear the same site between only a few products, and many parts of the surface is not straight or curved regularly, which requires the processing head in a cladding action according to requirements in many different attitude to work, a multi axis machine tool it is difficult to achieve, is usually carried out using manual operation manual processing head, at the same time as mentioned before, but also in a timely manner according to the matching process parameters adjustment, the techniques and operator proficiency and concentration requirements will be very high.