How to improve the machining accuracy and efficiency of CNC machining parts?
The precision of CNC workpieces directly affects the use of workpieces.However,in addition to the CNC machining machine's own machining accuracy and machining efficiency,in addition to the CNC machine tool itself,it should also be controlled from reasonable machining route setting,tool selection and correct installation,reasonable selection of cutting amount,programming skills and dimensional accuracy.Consider several aspects for comprehensive consideration.
First,programming skills
CNC programming is the most basic work of CNC machining.The pros and cons of workpiece machining program directly affect the final machining accuracy and machining efficiency of the machine tool.It can be started from clever use of intrinsic programs,reduction of cumulative errors in CNC systems,and flexible use of main programs and subroutines.
1,flexible use of the main program and subroutines
In the process of complex mold processing,it is generally processed in the form of multiple molds.If there are several identical shapes on the mold,the relationship between the main program and the subprogram should be used flexibly,and the subroutine should be called repeatedly in the main program until the machining is completed.Not only can the consistency of the processing dimensions be ensured,but also the processing efficiency can be improved.
2.Reduce the cumulative error of the CNC system
In general,the incremental programming is used to program the workpiece.It is the previous one to process the reference.In this way,continuous execution of multi-segment programs will inevitably produce a certain cumulative error.Therefore,in the programming,try to use absolute mode to program,so that each block is a workpiece.The origin is the reference,which can reduce the cumulative error of the CNC system and ensure the machining accuracy.
Second,a reasonable set of processing routes
Properly setting the processing route and processing sequence is an important basis for optimizing the machining program of the workpiece.It can be considered in terms of the machining path and the way of feeding.
When performing CNC milling of workpieces,it is necessary to select the appropriate feeding method in combination with the process requirements of the workpiece to ensure the cutting precision and machining efficiency of the workpiece.When milling the outer contour of the plane workpiece,the cutting and cutting path of the tool should be arranged.Try to cut in and out along the extension of the contour curve to avoid knife marks at the junction.At the same time,in the milling process,whether down milling or up milling should be selected according to the workpiece.
Third,the choice of tools and the correct installation
Whether it is CNC machining or general machining,the tool is directly applied to the workpiece,so its selection and installation of the workpiece processing accuracy and surface quality are the most important factors.In particular,the workpiece is machined on the CNC machining center,and the tool is stored in the tool magazine beforehand.Once the machining is started,it cannot be replaced at will.Therefore,the general principle of tool selection is:easy installation and adjustment,good rigidity,durability and high precision.
Fourth,the reasonable choice of cutting amount
The determination of the cutting amount is an important part of the CNC machining process.Its size is an important parameter of the main motion and feed motion of the machine tool,which has an important influence on the machining accuracy,machining efficiency and tool wear of the workpiece.The choice of cutting amount includes cutting speed,back-feeding amount and feed rate.The basic selection principle is:roughing takes a larger depth of cut to reduce the number of passes and increase the productivity of the workpiece;the finishing generally takes a smaller depth of cut to obtain a higher surface quality.
The above is the method summarized by Jiezhong CNC Machining Center to improve the machining accuracy and processing efficiency of CNC machining parts.Efficiency and precision have been improved,which is conducive to the improvement of profit margins and productivity.