Common methods for finishing holes are as follows

Honing is often used for finishing holes.

Honing is an efficient finishing method for machining holes with oilstone strips, which needs to be carried out on the basis of grinding or fine boring. Honing has high machining accuracy. After honing, the dimensional tolerance grade is IT7~IT6, and the surface roughness value is Ra0.2~0.05μm m. ..

Honing has a wide range of applications, which can process iron castings, hardened and non-hardened steel parts, bronze and so on. But it is not suitable for processing plastic metals that are easy to block oilstones. The honing aperture is Φ 5 ~ Φ 500mm, and it can also process deep holes with L/D > 10, so it is widely used to process the holes of engine cylinders, hydraulic cylinders and various gun barrels.

Grinding processing:

Grinding is also a common finishing method for holes, which needs to be carried out after fine boring, fine hinge or fine grinding. After grinding, the dimensional tolerance grade of the hole can be improved to IT6~IT5, and the surface roughness value is Ra0. 1~0.008μm, and the roundness and cylindricity of the hole are also improved accordingly. Abrasive materials, abrasives and grinding allowance used for grinding holes are similar to those of grinding excircles.

The invention relates to a hole grinding method for sleeve parts. The grinding tool is an adjustable grinding rod, which consists of a conical mandrel and a grinding sleeve. Twist the nuts at both ends to adjust the diameter within a certain range. The grooves and notches on the grinding sleeve can be evenly opened or contracted during adjustment, and abrasive can be stored.