HCPE Resin(Adhesive Type) Description
HCPE resin (Adhesive Type) is
excellent synthetic polymer material which has a fine overall performance. It
take the special polyethylene as raw material the product which results in
after the depth chlorination system. It has excellent solubility and can
dissolve in a variety of aromatics, chlorinated hydrocarbons, ketones, esters
and organic solvents. with excellent resistance to ozone, resistance to chemical
media and flame self-extinguishing and other excellent performance, the main
rigid PVC Adhesive Resin on the currently market, that has used in substituting
the CPVC Resin (adhesive type) massively.
This product is according
to the market and the international environmental protection request, develops
the successful new product spontaneously, has the proprietary intellectual
property rights, the only enterprise that succeeds in using the HCPE product
applies in the adhesive profession.
Adhesive Resin,Adhesive Type HCPE Resin,HCPE Resin,Adhesive High Chlorinated Polyethylene Shandong Gaoxin Chemical Co.,Ltd , http://www.gaoxinchem.com
4.1 Workpiece quality
As a teaching-reproduction robot, it is required that the assembly quality and accuracy of the workpiece must have a good consistency. The application of welding robots should strictly control the preparation quality of the parts and improve the assembly accuracy of the weldments. Part surface quality, groove size and assembly accuracy will affect weld tracking. Parts preparation quality and weldment assembly accuracy can be improved in the following aspects.
(1) Prepare the welding process for the welding robot, and carry out strict technical regulations on the part size, weld bevel and assembly dimensions. The tolerance of the general part and groove size is controlled at ±0.8 mm, the error of the assembly size is controlled within ±1.5 mm, and the probability of welding defects such as air holes and undercuts in the weld can be greatly reduced.
(2) Use high precision assembly tooling to improve the assembly accuracy of the weldment.
(3) Welds should be cleaned, free of oil, rust, welding slag, slag and other debris, allowing for a solderable primer. Otherwise, it will affect the success rate of arc ignition. The tack welding is changed from welding electrode welding to gas shielded welding. At the same time, the spot welding part is polished to avoid residual slag shells or pores, so as to avoid arc instability or even splashing.
4.2 Welding wire requirements
The robot can optionally use barrel or plated welding wire as needed. In order to reduce the frequency of replacing the welding wire, the robot should use the barrel welding wire, but due to the barrel welding wire, the wire feeding hose is long, the resistance is large, and the quality of the wire is high. When the welding wire with poor copper plating quality is used, the copper plating on the surface of the welding wire will reduce the inner volume of the pipe due to the frictional drop, the resistance will increase when the wire is fed at a high speed, the welding wire cannot be smoothly sent out, the vibration is generated, the arc is unstable, and the welding is affected. Seam quality. In severe cases, the phenomenon of jamming causes the robot to stop, so it is necessary to clean the wire guide in time.
4.3 Programming Skills
(1) Select a reasonable welding sequence. The welding sequence is determined by reducing the welding deformation and the length of the torch travel path.
(2) The space transition of the welding gun requires a short, smooth and safe moving track.
(3) Optimize welding parameters. In order to obtain the best welding parameters, the working specimens were produced for welding test and process evaluation.
(4) Reasonable position of the positioner, position of the welding gun, and position of the welding gun relative to the joint. After the workpiece is fixed on the positioner, if the weld is not the ideal position and angle, it is required to continuously adjust the positioner during programming so that the welded welds reach the horizontal position one by one according to the welding sequence. At the same time, the position of each axis of the robot should be constantly adjusted. , reasonably determine the position, angle and extension length of the welding gun relative to the joint. After the position of the workpiece is determined, the position of the welding gun relative to the joint is difficult to observe through the eyes of the programmer. This requires the programmer to be good at summing up the accumulated experience.
(5) Insert the clearing gun program in time. After writing a certain length of welding procedure, the cleaning gun program should be inserted in time to prevent the welding spatter from clogging the welding nozzle and the contact tip, ensuring the cleaning of the welding gun, improving the life of the nozzle, ensuring reliable arc ignition and reducing welding spatter.
(6) The programming procedure is generally not in one step. It is necessary to continuously check and modify the program during the robot welding process, adjust the welding parameters and the posture of the welding gun, etc., to form a good program.
4.4 Operating costs and management
Imported robot parts are expensive, and efforts should be made to reduce operating costs from all aspects. Lubricants can find the same low-cost alternatives in the country for performance and utility. The welding process enhances maintenance and improves the service life of consumable parts such as nozzles and contact tips. In addition, preventive maintenance of the robot system can effectively improve the service life of components.
Highly qualified managers, technicians and operators are essential for the full efficiency of the robot. The quality of a company's welding robots is largely due to people, so ensure a stable workforce.
5 Conclusion
The application of welding robots in the manufacture of traction girders and bolsters for electric locomotives has greatly improved the welding quality stability and production efficiency of the products. The application of welding robot is a complicated and comprehensive process, which puts new and strict requirements on the design structure of the weldment, the welding process, the quality of the parts and the assembly quality of the weldment. At the same time, the stability of the relevant staff also affects the quality of the robot application, and should continue to accumulate experience in long-term applications to maximize the benefits of the robot.
Application of welding robot in the manufacture of locomotive body (2)
4 welding robot application experience