Basic Knowledge of Machining Accuracy for Various Machining Equipment

1. Conventional Lathe:

Lathes are primarily used to machine shafts, discs, sleeves, and other workpieces with rotary surfaces; they are the most widely used type of machine tool in mechanical manufacturing. (Capable of achieving an accuracy of 0.01 mm)

2. Conventional Milling Machine:

It can machine flat surfaces and grooves, as well as various curved surfaces, gears, and other components, and is also capable of machining relatively complex profiles. (Capable of achieving a precision of 0.05 mm)

3. Grinding Machines

Grinding machines are used to grind the surfaces of workpieces. Most grinding machines use high-speed rotating grinding wheels for grinding, while a few use other abrasives such as oilstones, sand belts, and free abrasives, such as superfinishing machines, belt grinders, lapping machines, and polishing machines. (Capable of achieving a precision of 0.005 mm; 0.002 mm for small parts)

4. Machinist Work

Machinist operations primarily include filing, sawing, scribing, drilling, reaming, tapping and threading, scraping, lapping, straightening, bending, and riveting.

5. CNC Lathes

Primarily used for machining batch-produced parts and high-precision components. (Capable of achieving a precision of 0.01 mm)

6. CNC Milling Machines

Primarily used for machining batch-produced parts, high-precision components, complex parts, and large workpieces. (Capable of achieving a precision of 0.01 mm)

7. Wire Cutting

Slow-speed wire cutting uses brass wire as the electrode, while medium-speed wire cutting uses molybdenum wire. Slow-speed wire cutting offers high machining precision and excellent surface finish. It is used for machining precision holes, precision grooves, and similar features. (Slow-speed wire cutting achieves a precision of 0.003 mm; medium-speed wire cutting achieves a precision of 0.02 mm)

8. EDM Machine

Electrical Discharge Machining (EDM) can process materials and complex-shaped workpieces that are difficult to machine using conventional cutting methods (such as grooves and corners in molds, small holes, irregularly shaped holes, and machining on cemented carbide). During machining, there is no cutting force, and defects such as burrs and tool marks are not produced. It is not affected by material hardness or heat treatment conditions. (Capable of achieving a precision of 0.005 mm)