CNC grinding is a computerized numerical control process that utilizes machines with a rotating grinding wheel to remove material from a workpiece through abrasion.
Each grain on the surface of a CNC grinding machine's wheel cuts small chips from a workpiece, this method is called shear deformation and is used to achieve high surface quality and precise shape and dimension. Because of the precision in this process, CNC grinding is often used to produce parts for automotive, medical, and aerospace industries, among more.
The abrasion and high spindle speeds in CNC grinding produce great levels of heat. When this heat is combined with the high-pressure coolant used to chill a workpiece, large concentrations of oil smoke and oil mist are emitted.
To ensure a clean air and safe work facility, it is imperative that CNC grinding environments are equipped with oil smoke and mist collectors for immediate filtration and removal of harmful contamination.
Centerless grinding - ideal for applications where a multitude of parts are processed in a short period of time.
Centerless grinding utilizes abrasive cutting to remove material from a workpiece. There is no spindle to secure the workpiece instead it's placed between two rotary grinding wheels. The speed of the grinding wheels determines how fast material is removed from a workpiece.
ID grinding - AKA bore grinding, internal grinding, or insider/inner diameter grinding, removes material from the inside diameter of a cylindrical or conical workpiece using precision.
The workpiece and the grinding wheel are rotated in opposite directions to provide reverse direction contact of the surfaces where grinding takes place.
OD Grinding - happens on the external surface of a workpiece between the centers. Centers are end units with a point that enable the workpiece to be rotated. The grinding wheel is rotated in the same direction. When both surfaces make contact they will be moving in opposite directions allowing for seamless operation.
Surface Grinding - the most popular grinding process. Surface grinders develop smooth finishes on flat surfaces through abrasive machining. The grinding wheel cuts chips of metallic and non-metallic substances from a workpiece making it more polished (flat or smooth).
Surface grinding is not restricted to cylindrical shapes only, there are a variety of options that can transfer different geometries to the workpiece.
Belt Grindring - can be used as a finishing, deburring, or stock removal process, belt grinders use coated abrasives to effectively remove or produce a specific finish.
Cylindrical Grinding - used to shape the outside of a workpiece, cylindrical grinders can work with a range of shapes but the workpiece must have a central axis of rotation.
Cylindrical grinding is often used to produce precision rods, shafts, tubes, bushings, and bearing races. The part is rotated and sent past the wheel or wheels to form a cylinder shape.
Gear Grinding - common processes include grinding, hobbing, milling, and broaching. Gear grinding is used to remove the remaining material left by other manufacturing processes to produce a high-precision gear.