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Three simple solutions for Turning chips

Jan. 13, 2020

Effective chip removal can avoid scratching the surface of the CNC Turning Parts and prevent the chips from getting stuck on the parts and tools before the second cutting, so the iron chips should be broken as much as possible so that the production can be smooth and stable. So what do you do once you keep getting crumbs? As a CNC Turning Parts Factory, let me tell you.

CNC Turned Brass Parts

CNC Turned Brass Parts

There are three solutions:

1. Increase cut depth Ap

2. Increase feed F

3. Use sharper chip breaker blades

Increasing the cutting depth and increasing the feed both have the same effect, that is, to make the iron filings stronger, so that when the same curvature, the iron filings can be broken.

After the cutting depth is increased, the iron chips are broken under the same curvature. Increasing the feed is to increase the cutting depth in the axial direction, so for the same reason, I will not draw it.

Of course, most of the time, the depth of cut cannot be adjusted, mainly the adjustment of the feed (it is best to reduce the speed, F is unchanged, and F is increased, which can also increase the tool life). However, increasing the feed will bring corresponding problems.

Problem one: The cutting force becomes larger, and the strength requirements of the entire processing system are increased. Vibration may occur. If the vibration is not enough, you must think of other methods.

Problem two: The finish is reduced. In the case of the same rounded corners, the finish of the feed will definitely decrease, so pay attention to the finish of the workpiece. What is the geometry? In fact, the chip breaker is introduced in front of each tool sample.

A chip breaker mainly depends on the rake angle and the blade width, just like the angle marked in the "groove profile" in the figure above. The larger the angle, the larger the angle of iron chip bending, and the thinner the iron chip is more likely. Chipbreaking, so when you continue to chip, you have to look at the rake angle of the blade you are using now, and then change the blade with a larger rake angle for processing, and the chip breaking will be better.

The other is the blade width. The blade width is not reflected in the above picture, but it is reflected by the depth of cut. It is better, that is, the depth that this blade is suitable for processing. If the blade you are using is constantly chipping, then you see Look at other blades that can cut shallower. It is well understood that the smaller the blade width, the shallower the cut. But the depth of cut must be about the edge width, otherwise it is not cutting but grinding. In short, keep chipping, choose a smaller blade width, can cut thinner, chip breaking is better.

However, choosing a large rake angle and a small blade width will also cause problems, that is, the strength of the blade is not enough, and the tool will break the blade more willingly. So if you choose a sharper blade and try again, you can choose a slightly softer one. 

Our company also has CNC Turned Brass Parts on sale, welcome to consult.