Grinding method of CNC centerless grinder

CNC centerless grinder is a relatively commonly used grinder, and it is one that cannot be ignored. It is generally used for grinding some large parts, mainly for grinding the inner hole and end face. The parts can be gear parts, bearing trap parts, etc. Centerless cylindrical grinders have better productivity. Mostly used for mass production and easy to realize automation. Because it is CNC, it can meet the processing needs of a variety of parts.

CNC centerless grinder is a type of grinder that does not need to use the axis positioning of the workpiece for grinding. Can automatically repair and automatically compensate. The guide wheel feed guide rail is a double V-shaped needle roller guide wheel, which uses a servo motor to feed, which can compensate for the grinding wheel dressing. The machine tool is equipped with an automatic loading and unloading mechanism and can perform automatic cycle grinding.

There are three main grinding methods for centerless cylindrical grinders: through type, plunge type and plunge-through type, and through type centerless grinding. The workpiece is fed along the axis of the grinding wheel for grinding. Adjust the slight inclination of the guide wheel axis to achieve axial feed of the workpiece. Suitable for grinding slender cylindrical workpieces. Short shafts and sleeve workpieces without center holes, etc. Plunge type centerless grinding. There is an axial positioning fulcrum on the pallet, and the workpiece is supported at a certain position on the pallet, and is ground with a grinding wheel or guide wheel. Used for grinding workpieces with shoulders or bosses as well as cones, spheres or other rotating workpieces. Plunge-through centerless grinding is a combination of the two.

Grinding method of CNC centerless grinder

CNC (Computer Numerical Control) centerless grinder is an efficient and precise grinder that is widely used for processing shaft-shaped workpieces. This article will introduce the grinding method of CNC centerless grinder and gain an in-depth understanding of its working principle and operation process.

working principle

CNC centerless grinding machines use centerless grinding technology, that is, no center support is used between the workpiece and the grinding wheel. The main principles of this technology include:

Principle of centerless grinding: The CNC centerless grinder uses the relative movement of the worktable and the grinding wheel to keep the workpiece rotating during the grinding process. Compared with traditional center grinding, centerless grinding is more suitable for long workpieces.

Automatic feed control: The CNC system controls the grinding process to realize automatic feeding, automatic grinding and automatic tool retraction. This ensures efficient and stable grinding operations.

Operating procedures

The grinding method of CNC centerless grinder generally includes the following steps:

Workpiece clamping: Mount the shaft-shaped workpiece to be machined on the workbench of the centerless grinder. The selection and adjustment of fixtures are key to ensuring the stability and processing accuracy of the workpiece.

Grinding wheel selection: Select the appropriate grinding wheel according to the workpiece material and processing requirements. Different grinding wheels have different grinding characteristics, such as particle size, hardness, etc.

Machine tool adjustment: Adjust various parameters of the grinder through the CNC control system, including feed speed, rotation speed, grinding depth, etc. Precise control of these parameters determines the machining results.

Rough grinding and fine grinding: CNC centerless grinding machine can achieve integrated processing of rough grinding and fine grinding. First, rough grinding is performed to quickly remove excess material; then fine grinding is performed to improve the surface quality and dimensional accuracy of the workpiece.

Measurement and inspection: During the grinding process, the dimensions of the workpiece are detected in real time through laser measurement, induction probes and other devices. This helps to adjust grinding machine parameters in real time to ensure that the machining results meet the requirements.

Deburring: Finally, deburring may be required to ensure that the surface of the workpiece is smooth and meets final requirements.

Application areas

CNC centerless grinders are widely used in many fields due to their high efficiency and precision, including:

Automotive industry: Used to manufacture automotive bearings, transmission shafts and other parts.

Aerospace: Used for processing high-precision shaft-shaped parts such as aircraft and missiles.

Medical Devices: Used to produce high-precision medical device components.

Electronic equipment: Used for processing precision motor shafts, sensors and other components. ​

In addition, centerless grinders also have tangential feed grinding and end-feed grinding that allows the stepped workpiece to advance and retreat in the axial direction.