According to end geometry:
1) Flat end milling cutter
2) Flat bottom R angle end milling cutter
3) Ball end milling cutter
4) Indexable insert end milling cutter
According to end geometry:
1) Flat end milling cutter
2) Flat bottom R angle end milling cutter
3) Ball end milling cutter
4) Indexable insert end milling cutter
General CNC machining generally refers to precision machining, CNC machining lathe, CNC machining milling machine, CNC machining boring milling machine, etc.
It can be seen that the relationship between computer gongs and CNC is very close. Computer gongs and CNC are actually the same thing, both called CNC machine tools, but different people in different places call them different. Numerical control machine tools, even if they adopt numerical control technology, or are equipped with numerical control systems. In terms of application, CNC machine tools are used to represent various operations (such as spindle speed change, loose workpiece, feed and withdraw, start and stop, tool selection, cutting fluid supply, etc.) and steps required in the processing process, as well as the relative displacement between tools and workpieces with digital codes. Digital information is sent to a special or general computer through the control medium, and the computer processes and calculates the input information, Sending various commands to control the servo system or other executive components of the machine tool is the way for the machine tool to automatically process the required parts.
NC machining is an advanced machining technology in today’s mechanical manufacturing, and it is an automatic machining method with high efficiency, high precision and high flexibility. It inputs the NC program of the workpiece to the machine tool, and under the control of these data, the machine tool automatically processes the workpiece that meets people’s wishes to create beautiful products. Numerical control processing technology can effectively solve such complex, precise and small batch changeable processing problems as molds, and fully meet the needs of modern production.
The processing sequence shall be arranged according to the structure of the parts and the condition of the blanks, as well as the need for positioning and clamping, with the focus on ensuring that the rigidity of the workpiece is not damaged.
Generally, the sequence shall follow the following principles:
What are the common types of metal surface processing? According to the summary of our production experience for many years, it can be divided into several common processing methods: metal painting processing, electroplating, surface polishing processing and metal corrosion.
The above are several common ways of metal surface processing.
During the hardware processing, the production and processing stages of hardware processing are divided into the following stages:
(1) Ensure the processing quality of hardware accessories
During rough machining of hardware parts, the metal layer cut out is thick, the cutting force and tightening force are large, and the cutting temperature is high, which will cause large deformation. According to the processing stage, the processing error caused by rough processing can be corrected by semi finishing and finishing, so as to ensure the processing quality of parts.
(2) It is convenient to find the defects of hardware parts processing blanks in time
Various defects of the blank (such as porosity, sand inclusion and insufficient allowance of the casting) are found after rough machining, which is convenient for timely repair or scrapping to avoid unnecessary waste caused by further processing.
(3) Easy to arrange heat treatment process
After rough machining, stress relief heat treatment shall be arranged to eliminate internal stress. Before finishing, final heat treatment such as quenching shall be arranged. The deformation caused by heat treatment can be eliminated by finishing.
(4) Reasonable use of hardware accessories processing equipment
The rough machining allowance is large and the cutting amount is large. The machine tool with high power, good rigidity, high efficiency and low accuracy can be used. The precision machining has small cutting force and little damage to the machine tool. High precision machine tools are adopted. This gives full play to the respective characteristics of the equipment, which can not only improve productivity, but also prolong the use of precision equipment
There are many reasons for over cutting of workpieces in CNC machining. If the workpieces are over cut, they can be processed after repair welding. If the workpieces are over cut, they can be directly scrapped. In particular, over cutting of workpieces during large-scale mold processing is the most troublesome thing. How to deal with it? Let me share with you the work experience summarized in CNC machining
Hardware processing
If the workpiece is over cut, it is caused by carelessness and forgetting to take the tool radius into account in the programming. If it is software programming, it may be caused by the centering of the selected tool rather than tangency. These two programming methods will lead to the workpiece over cut.
The above are the reasons for over cutting of several common machining parts. Other reasons include looseness of the spindle and low precision of the ball screw, which will cause over cutting in the machining process. After over cutting, check the reasons in time to prevent similar situations from happening again.
There are many reasons for workpiece overcutting in CNC processing. If the workpiece is overcutted, it will be processed after repair welding, or it will be directly invalidated. In particular, if the workpiece is overcutted during large mold processing, let’s share with you the work experience summarized in CNC processing
Hardware processing
If the workpiece overcut is programmed manually, it is caused by forgetting to take the tool radius into account in the programming. If it is software programming, it may be the selected tool alignment rather than tangency. These two programming methods will lead to the workpiece overcut.
The above are the reasons for overcutting of several common machining parts. Others, such as loose spindle and low precision of ball screw, will cause overcutting in the machining process. After overcutting, check the reasons in time to prevent similar situations from happening again.
ken. tang@chengcg.com
In terms of size, the parts meet the blueprint specifications, but the surface finish and overall appearance are not ideal? What should we do?
Consider the following options:
Although using air and coolant is a good choice to control chip removal, pay attention to coolant. Avoid using coolant when cutting intermittently. Hot cracks on the cutting edge will occur Due to intermittent heating and rapid cooling of cutting edges And it can lead to premature blade failure, or at least start to affect your surface finish because of over stressed cutting edges and failure.
It is also worth mentioning that using a larger tip radius means that you must leave more material for completion. To ensure proper operation of the tool, you must set TNR equal to or greater than TNR in order to complete the removal of the tool.
When milling, try to use fillet or spherical end milling cutter instead of plane end milling cutter. Something with a rounded radius will give you a higher finish at sharp corners and will certainly help extend tool life.
ken. tang@chengcg.com
Let’s take a look at CNC machining and milling technology!
The above is about the skills in the process of precision CNC machining and milling. For the machining of simple and complex precision parts, the CNC milling technology will be different, which can be based on the appropriate machining line.
ken. tang@chengcg.com
In the machining industry, the accuracy parameters of CNC machining are mainly the level that the specific geometric parameters (specification, shape and position) of CNC parts are consistent with the ideal geometric parameters. Learn the following parameters in detail:
In the process of machining mechanical parts and small batch parts, CNC machining accuracy usually includes three level parameters: specification accuracy, shape accuracy and position accuracy.
The specific specification of the surface itself or the middle of the surface after machining of CNC parts is consistent with the middle of the ideal part specification. The ideal part processing specification refers to the median value of the specification indicated on the part drawing.
The specific shape of the machined surface of CNC parts is consistent with the ideal part surface shape. The ideal part surface shape refers to the definite surface geometry shape.
After machining, the specific parts of each surface of CNC parts are consistent with the parts between the surfaces of ideal parts. The position between the surfaces of ideal parts refers to the certain position between the surfaces.
The above is the accuracy parameter control of CNC machining. For different shapes, shapes, simplicity and complexity, it is necessary to select appropriate machining process parameters to improve CNC machining efficiency and ensure the machining accuracy of parts.
ken. tang@chengcg.com