Tube sheets are widely used in petrochemical, boiler, refrigeration, steam turbine and other industries, and tube sheet processing is an important process in the manufacture of heat exchangers, and occupies a very important position in the production of heat exchangers. The precision of tube sheet processing, especially the tube hole spacing and tube diameter tolerance, verticality, and smoothness, all greatly affect the assembly and performance of the heat exchanger. Large-scale tube sheets are characterized by a large number of tube holes, dense, small and deep holes, high precision and smoothness requirements, which put forward high requirements for the processing of tube sheets.
Traditional tube sheet processing methods
Although the processing technology of each manufacturer is slightly different, in general, it is nothing more than marking the line first, punching the sample, drilling a small hole with a small drill bit, and then formally drilling. Holes, chamfered at the end. For complex graphics, drawing lines is very troublesome. Besides drilling, the operator drills the hole with the rocker arm, adjusts the positioning of the rocker arm, then drops the drill bit, then raises the drill bit and readjusts the positioning of the rocker arm. It takes several actions to drill a hole, and the labor intensity of the operator is relatively high. low efficiency. All in all, the traditional tube sheet processing method is low in precision, time-consuming and laborious, making tube sheet processing a bottleneck in the entire production process. When talking about tube sheet processing, people frown.
Advanced tube sheet processing methods
In fact, one of the main problems restricting tube sheet processing is equipment. In the traditional tube sheet processing, the radial drill is the main equipment. Due to its manual operation characteristics, the operation method is relatively fixed, and it is difficult to tap potential. Although methods such as drilling jigs can be used to improve efficiency, they cannot solve the fundamental problem. Only by finding a solution from the equipment can we fundamentally solve the problem. Multi-axis CNC drilling machines have been widely used in foreign pipe hole processing, and radial drills are no longer used. CNC plane drilling machines can replace manual marking and drilling, which can greatly improve processing accuracy and efficiency.
Ritec is a manufacturer dedicated to the research and development and production of CNC machine tools. Since the successful development of the first super-large CNC drilling machine, the technology has become more mature, and dozens of super-large CNC drilling machines have been produced. Type structure, multi-spindle (2 to 12 spindles), the user can choose the size of the worktable and the number of spindles when ordering. The maximum size of the workpiece that can be processed can reach 12mX12m. With CAD/CAM automatic conversion program, it can process CNC drilling, reaming, reaming, chamfering and other processes. Thereby omitting manual marking, no need to use manual drilling, making the tube sheet processing technology a qualitative leap. Greatly improved machining accuracy and production efficiency. Because of its high efficiency, the work that used to be completed in a month can now be completed in a few days.
