What are the factors affecting surface roughness in cnc precision parts machining?

What Are The Factors That Affect The Surface Roughness When Machining Precision Parts ?

1. The Influence Of Cutting Force Friction Force.When Machining Precision Parts, The Radius Of The Cutting Edge Of The Tool The General Kneading Friction Of The Workpiece May Cause Plastic Deformation Of The Metal Material, Resulting In Distortion Of The Existing Residual Area Deepening Of The Groove. At This Time, The Surface Roughness Increases. The Machining Of Brittle Materials Cuts The Scraps Into Broken Particles. The Surface After Processing Often Has Signs Of Particle Collapse, Leaving Many Pits, Making The Surface Rough.

2. The Influence Of Chip Edge Accumulation. When The Tool Cuts Plastic At A Certain Speed, Some Small Particles On The Chips Will Adhere To The Tip Of The Rake Face, Forming A High-Hardness Accumulation Edge That Can Replace The Rake Face Cutting Edge Cutting.

When The Friction Force Between The Chip The Stacking Edge Is Greater Than The Cold Welding Strength Between The Stacking Edge The Front Cutting Edge, When It Is Impacted Vibrated, The Stacking Edge Will Fall Off, So That The New Upper Edge Will Gradually Form In The Future. The Formation, Growth Shedding Of The Stack Edge Will Seriously Affect The Surface Roughness Of The Part.

3. The Influence Of Scales. During The Cutting Process, Due To The Friction Cold Welding Of Chips On The Cutting Surface During The Machining Of Precision Parts , The Chips Will Regularly Stay On The Rake Face, Thereby Kneading The Newly Processed Surface. In Severe Cases, The Surface Will Tear. The Surface Will Form Scales, Making The Surface Rough Uneven.

Due To The Influence Of The Above-Mentioned Physical Factors On Roughness, In Order To Reduce The Surface Roughness, In Addition To Reducing The Plastic Deformation Caused By Cutting Force, The Accumulation Of Tumors Oxide Scales Should Also Be Avoided During The Processing Of Precision Parts.

The Main Technological Measures Are: A Cutting Speed That Is Prone To Edge Accumulation Burrs, Improve The Cutting Performance Of The Material, Correctly The Cutting Fluid.

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