Views: 600 Author: Site Editor Publish Time: 2024-10-12 Origin: Site
CNC machining center is a relatively excellent processing model in terms of processing efficiency, processing accuracy or processing capacity. From the processing form, the processing process is controlled by the control system through the execution of the workpiece processing program for the whole unmanned control. In a single equipment can be completed including milling, drilling, tapping, boring, reaming, etc., including a variety of work processes.
In case of some problems in processing, such as tool wear, processing allowance is too large, it is not like ordinary processing equipment can be stopped and adjusted at will, so the processing tool it uses is more strict than ordinary processing equipment.
This article briefly introduces some knowledge of the relevant processing tools, and hopes that friends who have been controlling or preparing to control CNC machining center machine tools can draw lessons from it.
Among the parts of the CNC milling machine, the finishing of the surface is an important process, and it is also a process that is often done, and the quality requirements for the surface are high. Sometimes you get uneven and uneven planes that don't meet the requirements.
The main reason for this problem is that when finishing, the feed speed is too fast, and the vibration caused by the fast moving tool is easy to leave an uneven path for the machining surface. There is also a problem that when finishing on the opposite side, sometimes there is a certain difference between the knife marks between the two adjacent knife paths, which is caused by the inconsistent direction of the cutting tool.
In addition, the cutting oil used also plays a vital role, high-end special vulcanized cutting oil can effectively improve the surface finish of the workpiece by releasing extreme pressure agent components.
In the workpiece of the CNC milling machine, almost every workpiece will require the fine milling side, and many times there will be the problem that the cutter mark on the fine milling side is too obvious, which is absolutely not allowed to appear, and will seriously affect the appearance of the workpiece.
The main cause of this problem is the improper selection of the position and parameters of the advance and retreat tool and the deep layering of the tool. There are many kinds of processing, and the milling methods provided by different processing will also be different, but they will provide the depth selection of the tool and the parameter selection of the access knife.
In order to avoid the problems raised above, you can make relevant adjustments from three aspects.
The selection of the feed point should be correct, it should be selected at the very edge, not in the middle, and the return point can not be the same side;
If the knife must be cut in the middle, increase an overlap amount when the knife is advanced and withdrawn;
In the side of the seiko, it is best to use the full cut depth.
In the ordinary and high-speed, the tool needs to be replaced, and if the tool change operation does not pay attention to the relevant adjustment of the parameters, there will be obvious traces, seriously affecting the appearance of the workpiece.
In the bottom or side of the finishing milling, the appearance of the cutter mark is a common phenomenon, many times people will think that this is an unavoidable error, in fact, this is completely avoidable.
The finishing of the concave corner needs to be replaced with a small tool, which will swing due to the force in the process, and it will be easy to produce traces of the knife at the corner.
Modern workpiece processing requirements for the surface is getting higher and higher, the appearance of burrs or batch fronts is not acceptable, and if the file is used to correct the workpiece, it will also affect the accuracy and size of the workpiece, etc., to be used directly after milling, no longer need to be polished later.
However, in the actual production, there will still be a large number of burrs and batch fronts.
To solve this problem, we must pay great attention to the use of tools, and use special tools to ensure sharp cutting.
Plan the cutting path carefully. Add a second polishing path. First, cut the surface. Next, cut the sides. Then, cut the surface again. This prevents burrs and ensures a clean finish. It's helpful for workpieces that can't be polished later. Also, use special vulcanized cutting oil instead of water-based cutting fluid. This helps avoid burrs.
For the finishing of some special shape workpieces, the software usually has fitting errors, and sometimes if the calculation error is too large, it will cause the deformation of the workpiece and affect the appearance.
To solve this problem, it is necessary to start from the software, and the error control does not affect the speed of calculation, nor will it cause deformation to the workpiece.
The above is the CNC milling machine processing quality problem analysis and related measures, through a reasonable arrangement of processes, the development of accurate cutting path, the use of high-performance tools and cutting oil, the use of reliable quality of raw materials and other measures can effectively avoid the generation of the above problems, so as to reduce the comprehensive maintenance costs of enterprises, improve the market competitiveness of products.
Yaogong CNC Machines have very good machining quality, please feel free to contact us.
