This is because of the periodic works with unevenness characteristics during the cutting process, and the periodic phases are repetitive overlapping and slightly staggered. It is generally called “resonance”. The main cause comes from the resonance of the natural frequency of the machine tool structure and the frequency of the workpiece clamping system.

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How to reduce chatterin machining

Chatter marks meaning

The forced vibration caused by intermittent cutting or the defective turning of the rotating parts. It generally occurs due to the below reasons:

How to reduce chatter on a lathe

Among such problems, intermittent turning is a problem of machining technique. The most factors of the quality of parts depend on the assembly technique of the machine tool and the quality control of its key components, and also related to the design concept of the machine tool structure. Besides, the vibration characteristics are also directly related to the number of revolutions.

Chatteringmark

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The chattering theory analysis is quite difficult in the research of the machine tool. The origin of chattering is quite related to the processing material, mechanical design and cutting conditions. The cutting process involves the material of the workpiece, the hardness, and the size of the feed, etc. And the machine structure involves the structural strength design of each machine tool, such as spindle bearings, turret design, and tool clamping.

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The problem of vibration during CNC machining causes chatter on the surface of the workpiece. It also causes the rework rate and scrap rate are high. The reason for the vibration of the machine tool is generally that the rigidity of the machine tool, the workpiece, and the tool (any one or more) is insufficient. The following describes the aspects of the chatter that need to be investigated and what countermeasures are taken.

What causes chatterin machining

Since the natural frequency of the structure is only changed with the adjustment of clamping or fixing mode, changing the cutting conditions (such as changing the rotation speed) can often improve the cutting vibration when the chatter occurs. However, in some occasions where the cutting speed cannot be changed (such as threads tapping), it is only possible to solve such problems by changing the clamping method or even changing the tool or tool fixing method.

Reduce chatter After Effects

The Axial depth of cut (AP or ADOC), is the length that the tool engages a workpiece in its axis direction as it moves perpendicular to it.

Types of chatterin machining

Since there are a lot of mathematical equations in the theory, we won’t cover this part in depth. we only divide the chatter situation that the clients often have into the following two categories:

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