Understand knowledge about grinding processing: grinding machines, wheel selection, processing methods - Yashida Precision Machinery (Suzhou) Co., Ltd.

From the precision parts in mobile phones to the crankshafts in car engines, those workpieces with smooth surfaces and precise dimensions all rely on a key technology - grinding processing! Today, we will fully unlock the "hidden skills" of grinding processing, from application scope, grinding machine types, grinding wheel types to selection methods, all in one go.

1.Grinding: A versatile machining tool that can handle both soft and hard materials.

How wide is the application range of grinding? To say it is “omnipotent” is no exaggeration! Whether it is the inner and outer cylindrical surfaces, conical surfaces, or flat surfaces of the part, or even complex shaped forming surfaces and combined surfaces, grinding can be done easily. Even more powerful is its "combat power": the "ace" of finishing: most workpieces that require high-precision surfaces are ultimately completed by grinding; the "nemesis" of hard materials: workpieces that have been hardened by quenching and high-hardness special materials (such as carbide). Ordinary tools cannot "gnaw" at all, but grinding can be done with ease; the "all-rounder" of roughing: Don't think that it can only do "fine work", grinding can also be used for roughing work, and its efficiency is not inferior.

2. Grinder family: “processing artifacts” each with its own strengths

To do a good job in grinding, you cannot do without a grinder. There are many members of the grinder family, each with its own "exclusive skills":

1. Cylindrical grinder: specializes in the cylindrical surface of parts, such as cylindrical surface processing of shaft parts;

2. Internal cylindrical grinder: focuses on the inner hole processing of parts, such as the inner cylindrical surface of sleeve parts;

3. surface grinder: Mainly used for surface processing, grinding the surface of parts to a smooth surface with full precision;

4. Special customized grinder: "tailor-made" for special parts (tool sharpening, crankshaft, splines, gears, etc.), such as the processing of complex forming surfaces and special-shaped parts

3. Grinding wheel selection: 5 key factors determine the success or failure of processing

The grinding wheel is the "teeth" of the grinding process. It is made by bonding the abrasives with a bonding agent, pressing, drying, roasting, and turning. Choosing the right grinding wheel is half the battle! These 5 factors must be paid attention to:

①. Abrasive: material equivalent to “teeth”

②. Grain size: The thickness of the "teeth". Grain size refers to the size of the abrasive grains in the grinding wheel;

③. Binder: the "glue" that sticks to the abrasive, affecting the strength, toughness and durability of the grinding wheel;

④ Hardness: How easy it is for the "teeth" to fall off. For hard materials, use a soft grinding wheel (it will fall off easily after being blunted to avoid scratching the workpiece), and for soft materials, use a hard grinding wheel;

⑤. Organization: The gaps inside the grinding wheel. Large gaps allow for good heat dissipation and smooth chip removal, and are suitable for rough machining. Small gaps have high precision and are suitable for finishing.

4. Grinding method: Choose the right method to double improve efficiency and accuracy!

Different workpieces are suitable for different grinding methods. Only by finding the right skills can you get twice the result with half the effort:

1.External/internal grinding: Longitudinal grinding method: high processing accuracy and good surface quality, suitable for high-precision parts

2.Horizontal grinding method: high efficiency, suitable for batch processing of short shafts, sleeves, etc.;

3.Surface grinding: Circular grinding: Use the side of the grinding wheel to grind the surface with high precision and smooth surface, suitable for high-precision surface processing

4.End face grinding: Use the end face of the grinding wheel to grind the plane, which is highly efficient and suitable for large-area plane processing.