The up milling and down milling difference
1. CNC milling machining: up and down milling
In CNC milling machining, the rotation direction of the milling cutter is generally unchanged, but the feed direction is changed. There are two common phenomena in milling: down milling and up milling. The cutting edge of the milling cutter is subjected to an impact load every time it cuts. In order to successfully mill, you must consider the correct contact between the cutting edge and the material when cutting in and cutting out.
When CNC milling machining, the formation of chips must be considered. The decisive factor for chip formation is the position of the milling cutter. We must strive to form thick chips when the blade cuts in, and thin chips when the blade cuts out to ensure a stable milling process.
Keep in mind that the golden rule of CNC milling is "from thick to thin" to ensure that the chip thickness is as small as possible when the blade is cut out.
2. CNC milling machining: down milling
In down milling of CNC machining service, the cutting tool is fed in the direction of rotation. As long as the machine tool, fixture and workpiece permit, down milling is always the preferred method. In edge down milling, the chip thickness will gradually decrease from the beginning of the cutting, and eventually reach zero at the end of the cutting. This prevents the cutting edge from scratching and rubbing against the surface of the part before participating in the cutting.
3. CNC milling machining: reverse milling
In up-milling, the feed direction of the cutting tool is opposite to the direction of rotation. The chip thickness gradually increases from zero until the end of the cutting. The cutting edge must be forcibly cut in to produce a scratching or polishing effect due to friction, high temperature, and frequent contact with the work-hardened surface caused by the front cutting edge. All this will shorten the tool life.
If you want to know more about up milling process, please visit our website.
WALKSON is a leading supplier specializing in providing high-quality castings and forgings for industrial applications. Established in 2019, we have built a strong reputation for supplying customized and precision-engineered components to meet the demanding needs of industries worldwide.
We focus on delivering value-added solutions to our clients, ensuring top-notch quality, timely delivery, and competitive pricing. Our product portfolio includes heavy castings and forgings for sectors such as machinery, automotive, energy, and construction, with a particular focus on Roots blower castings, gear wheels, planetary reducers, long shafts, and other mission-critical parts.
As a steel foundry china, we will do our best to meet all the needs of customers.
Sign in to leave a comment.