Medical device parts parts machining accuracy analysis

Medical Device Parts Often Use Turning, Milling, Planing, Grinding, Drilling, Boring, Etc., So What Is The Accuracy? Today, Huiwen Briefly Analyzes The Highest Accuracy Of These Machine Tools The Tolerance Levels That Can Be Achieved By Various Processing Methods. Huiwen Zhizao Is A Machining Factory With More Than Ten Years Of CNC Processing Experience. It Has A Full Range Of Equipment, CNC Turning/Milling/Grinding/Drilling/Processing.Partners With Parts Processing Needs Are Welcome To Call Us For Quotation.

1. Turning

The Precision Parts Are Rotating, The Turning Tool Moves In A Straight Line Curve In The Plane For Cutting. Turning Is Generally Performed On A Lathe To Process The Inner Outer Cylindrical Surfaces, End Faces, Conical Surfaces, Forming Surfaces Threads Of The Workpiece.

The Turning Accuracy Of Medical Device Parts Is Generally IT8-IT7, The Surface Roughness Is 1.6-0.8μm.

1) Rough Turning Strives To Improve Turning Efficiency By Using Large Cutting Depth Large Feed Rate Without Reducing Cutting Speed, But The Machining Accuracy Can Only Reach IT11, The Surface Roughness Is Rα20-10μm.

2) For Semi-Finishing Finishing Of Precision CNC Parts, High Speed Small Feed Rate Cutting Depth Should Be Used As Much As Possible. The Machining Accuracy Can Reach IT10-IT7, The Surface Roughness Is Rα10-0.16μm.

3) Using A Finely Polished Diamond Turning Tool On A High-Precision Lathe To High-Speed Finish Turning Of Non-Ferrous Metal Parts Can Achieve A Machining Accuracy Of IT7-IT5 A Surface Roughness Of Rα0.04-0.01μm. This Type Of Turning Is Called "Mirror Turning".

2. Milling

Milling Is A Highly Efficient Machining Method That Uses A Rotating Multi-Edged Tool To Cut Workpieces. It Is Suitable For Precision Machining Of Planes, Grooves, Various Forming Surfaces (Such As Splines, Gears Threads)  Medical Parts With Special Shapes Of Molds . According To Whether The Main Motion Speed Direction During Milling Is The Same Opposite To The Workpiece Feed Direction, It Is Divided Into Forward Milling Reverse Milling.

The Milling Accuracy Of Medical Parts Can Generally Reach IT8-IT7, The Surface Roughness Is 6.3-1.6μm.

1) The Machining Accuracy During Rough Milling Is IT11-IT13, The Surface Roughness Is 5-20μm.

2) The Machining Accuracy During Semi-Finishing Milling Is IT8-IT11, The Surface Roughness Is 2.5-10μm.

3) The Machining Accuracy During Fine Milling Is IT16-IT8, The Surface Roughness Is 0.63-5μm.

3. Planing

Planing Is A Cutting Method That Uses A Planer To Make Horizontal Relative Linear Reciprocating Motion On The Workpiece. It Is Mainly Used For The Shape Processing Of Precision Parts Of Medical Devices .

 The Planing Accuracy Of CNC Precision Parts Can Generally Reach IT9-IT7, The Surface Roughness Is Ra6.3-1.6μm.

1) The Rough Planing Accuracy Can Reach IT12-IT11, The Surface Roughness Is 25-12.5μm.

2) The Semi-Precision Planing Accuracy Can Reach IT10-IT9, The Surface Roughness Is 6.2-3.2μm.

3) The Precision Of Fine Planing Can Reach IT8-IT7, The Surface Roughness Is 3.2-1.6μm.

4. Grinding

Grinding Refers To A Processing Method That Uses Abrasives Grinding Tools To Remove Excess Material A Workpiece. It Is A Type Of Finishing Is Widely Used In The Machinery Manufacturing Industry.

Grinding Is Usually Used For Semi-Finishing Finishing, With An Accuracy Of IT8-IT5 Even Higher, The Surface Roughness Is Generally Ground To 1.25-0.16μm.

1) The Surface Roughness Of Precision Grinding Is 0.16-0.04μm.

2) The Surface Roughness Of Ultra-Precision Grinding Is 0.04-0.01μm.

3) The Surface Roughness Of Mirror Grinding Can Reach Below 0.01μm.

5. Drilling

Drilling Is A Basic Method Of Hole Processing. Drilling Is Often Performed On Drilling Machines Lathes, But Can Also Be Performed On Boring Machines Milling Machines.

The Machining Accuracy Of Drilling Is Low, Generally Only Reaching IT10, The Surface Roughness Is Generally 12.5-6.3μm. After Drilling, Expansion Reaming Are Often Used For Semi-Finishing Finishing.

6. Boring

Boring Is A Cutting Process That Uses A Tool To Enlarge The Inner Diameter Of A Hole Other Circular Contour. Its Application Range Generally Ranges Semi-Roughing To Finishing. The Tool Used Is Usually A Single-Edged Boring Tool (Called A Boring Bar).

1) The Boring Accuracy Of Steel Materials Can Generally Reach IT9-IT7, The Surface Roughness Is 2.5-0.16μm.

2) The Machining Accuracy Of Precision Boring Can Reach IT7-IT6, The Surface Roughness Is 0.63-0.08μm.

Note:

Machining Accuracy Is Mainly Used To Characterize The Fineness Of The Product Is A Term For Evaluating The Geometric Parameters Of The Machining Surface. The Standard For Measuring The Machining Accuracy Of Medical Device Parts Is The Tolerance Grade, Which Is 20 In Total, IT01, IT0, IT1, IT2, IT3 To IT18. Among Them, IT01 Indicates The Highest Machining Accuracy Of The Part , IT18 Indicates The Lowest Machining Accuracy Of The Part. General Factory Mining Machinery Belongs To IT7 Grade, General Agricultural Machinery Belongs To IT8 Grade. According To The Different Functions Of Precision CNC Parts, The Machining Accuracy Required Is Different, The Selected Machining Form Processing Technology Are Also Different.