With the development of the era is getting faster and faster, there are a lot of mechanical equipment that did not appear in the society before, which also represents the era of more and more high-tech, the precision machining in the factory has been updated recently, but what do you need to pay attention to in the process of processing? Follow me to learn about it.
1. Precautions for CNC processing
(1) when the workpiece is too high, it should be layered with a knife of different lengths. After using a large knife to open the rough, it should be removed with a knife.
(2) The application of flat knife processing plane, ball knife less, in order to reduce the processing time; If there is an incline and it is an integer, use an incline cutter.
(3) Set tolerances reasonably, so that the machining accuracy and computer calculation time balance each other, do more procedures, reduce the empty tool time.
(4) High hardness of blank material, choose inverse milling; Blank material hardness is low, choose down milling. Rough milling and finish milling.
(5) The tool material has good toughness and low hardness for rough machining, and the tool material has poor toughness and high hardness for finishing.
2. CNC machining technology
(1) Part clamping method and fixture selection
CNC machine tool processing is processed parts of the clamping method should also be a reasonable choice of positioning datum and clamping scheme, in the fine datum selection, generally to follow the "benchmark unified" and "benchmark overlap" these two principles, in addition to these two principles, we also consider:
a. As far as possible, all surfaces should be machined in a single positioning clamp. Therefore, positioning methods should be selected to facilitate the processing of each surface.
b. When the workpiece is clamped once, it should be able to complete the processing of all the surfaces of the workpiece.
c. When determining the position of the workpiece on the workbench, the influence of the length of the tool and the stiffness of the tool on the machining quality should be taken into account.
d. Jig used in controlled processing should be selected as far as possible by general components assembled, and can be adjusted to shorten the production preparation cycle.
(2) Arrangement of processing sequence
When arranging the processing sequence, the basic principles must be followed, including "first surface after hole", "first rough after fine", etc. In addition to these basic principles, we should also follow the following principles, for:
a. Process the tool in a centralized manner to avoid repeated use of the same tool and reduce The Times and time of tool change.
b. For hole systems with high coaxiality requirements, the machining of the hole systems with other coordinate positions should be completed after one time positioning, so as to eliminate errors caused by repeated positioning and improve the coaxiality of hole systems.
c. Select and determine the tool point and the tool change point. Once the tool point is determined, it should not be replaced.