Precautions for daily processing of CNC machining center equipment
There are many problems that need to be paid attention to in the mechanical processing of large mechanical processing plants, such as the safety production requirements of large mechanical processing plants, the processing procedures of large mechanical processing plants, and the technical requirements that should be observed in mechanical processing. There are a lot of problems to pay attention to in machining process. What are the specific aspects?
1. Problems needing attention in CNC machining
(1) When the workpiece is too high, use a knife with different lengths to cut thick, and then use a knife to remove the surplus material.
(2) The flat bottom cutter should be used when machining the plane, which can effectively reduce the processing time; If there is a slope and it is an integer, the slope cutter shall be used for processing.
(3) The material with high hardness shall be processed by up milling; If the material hardness is low, it shall be processed by down milling; The finish machining adopts up milling, and the finish machining adopts down milling.
(4) The tool has good toughness and low hardness, suitable for rough machining; The tool has poor toughness and high hardness, which is suitable for finishing.
2. Problems Needing Attention in Clamping and Fixture Selection of Mechanical Parts
(1) The clamping method for machining mechanical parts shall reasonably select the positioning datum and clamping scheme. When we choose fixed datum, we should follow the two principles of "datum unification" and "datum coincidence".
(2) As far as possible, all surface processing should be completed in one positioning and clamping, so it is necessary to choose a positioning method that is easy for each surface of the workpiece to be processed.
(3) When determining the position of the workpiece on the workbench, it is necessary to consider the influence of the machining at each position, the length of the tool and the stiffness of the tool on the machining quality.
(4) Fixtures used in machining shall be assembled by common parts and adjustable, which can effectively shorten the production preparation cycle.
3. Problems needing attention in arranging machining sequence
(1) The basic principles of "face before hole" and "rough before fine" must be followed when arranging the machining sequence.
(2) Determine the tool point and tool change point. Once determined, it is not suitable for replacement.
(3) Processing according to the centralized process of tools can better avoid the repeated use of the same tool and reduce the number and time of tool replacement.
(4) For the hole system with very high coaxiality requirements, the hole system at other coordinate positions shall be processed after the whole processing of the hole system is completed after one positioning, which can effectively eliminate the error caused by repeated positioning and improve the coaxiality of the hole system.