Up-cut milling is one of the most widespread milling processes . Milling machines play a major role in removing material from workpieces. Depending on the type of workpiece, the material and also its position, different milling methods are used. Climb milling is usually preferable for a variety of reasons. When milling, the relationship between the feed direction of the material to be processed and the rotary movement of the milling head plays a decisive role.
In this article you will learn everything about up-cut milling. What exactly is up milling? And how does it differ from climb milling? We will also explain the advantages and disadvantages of up-cut milling and the situations in which it is used.
Definition: What is up milling?
Milling itself is a cutting manufacturing process in which a rotating tool – the so-called milling machine – is used. Up-cut milling is one of the milling processes. Its peculiarity is that the cutting edges of the milling head rotate in the opposite direction in which the material is fed.
Advantages of conventional milling
In contrast to down-cut milling, up-cut milling involves fewer risks. As the operator of the milling machine, you push it against the material to be processed during manual feed. The fact that the milling head rotates and feeds in opposite directions reduces the risk of your hand getting caught in the milling machine. In addition, up-cut milling is recommended when there is too much feed latitude, as is usually the case with old machines. Wood should always be milled in the opposite direction, and the wear on cast parts is less with this method.
Disadvantages of conventional milling
In contrast to climb milling, the results of up milling are often less clean. Since high pressure is generated during the milling process, the wear on the cutting edges is relatively high. In addition, the force required by the milling machine is high when milling in the opposite direction.
What is the difference between down milling and up milling?
The difference between the two milling processes can already be guessed from their name. In up-cut milling, the milling head and feed move in opposite directions, while in down-cut milling , the cutting edges of the milling machine rotate in the same direction as the feed. Chips are formed during milling. These are also known as comma chips because of their shape. With up-cut milling, chips are formed that thicken towards the exit point of the cutting edge, with down-cut milling the opposite is the case: the chip is thickest when the cutting edge enters and becomes thinner and thinner as the milling process progresses.
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When is conventional milling preferable to climb milling?
Up-cut milling is particularly recommended when a particularly clean result is not required, for example during preparatory work. You can mill away most of the material up-cut and then machine the rest down-cut. With manual feed, the trade association forbids milling in synchronism. This is also the case when a power feed unit is used.
What is better: down milling or up milling?
Down-cut milling offers a clean result, which cannot necessarily be said about up-cut milling. Climb milling is often recommended to avoid tearing. However, there is also a certain risk potential with up-cut milling, but this is much lower than with down-cut milling. Therefore, most specialists recommend up-cut milling. If there are tears, you should work in several infeeds to get a clean result.
When do you use up milling?
Up-cut milling is primarily used for workpieces made of wood and those workpieces that have hard and wearing edge zones. In general, up-cut milling is recommended because the risk of danger is lower compared to down-cut milling.
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