1. High processing precision
For some small and medium-sized through holes, the cylindricity can reach within 0.001mm. Some parts with uneven wall thickness, such as connecting rods, can have a roundness of 0.002mm. For large holes, the roundness can also reach 0.005mm. If there is no ring groove or radial hole, etc., it is also possible to achieve a straightness within 0.01mm/1m. Honing is more accurate than grinding, because the bearing supporting the grinding wheel is located outside the honed hole during grinding, which will cause deviation, small hole processing, and poor grinding accuracy. Honing generally can only improve the shape accuracy of the workpiece to be processed. To improve the position accuracy of the part, some necessary measures need to be taken. For example, the faceplate is used to improve the perpendicularity between the end face of the part and the axis.
2. Good surface quality
The surface is cross textured, which is beneficial to the storage of lubricating oil and the maintenance of oil film. It has a high surface support ratio (the ratio of the actual contact area between the hole and the shaft to the mating area between the two), so it can bear a large load and is resistant to wear, thereby improving the service life of the product. The honing speed is low (one tenth of the grinding speed), and the oilstone is in surface contact with the hole, so the average grinding pressure of each abrasive grain is small, so that the heat of the workpiece is very small during honing, and the surface of the workpiece is almost There is no thermal damage and deterioration layer, and the deformation is small. There is almost no sand embedded and extruded hard layer on the honed surface.
3. Wide processing range
Mainly process various cylindrical holes: through holes, axial and radial discontinuous holes, such as holes with radial holes or grooves, keyway holes, spline holes, blind holes, multi-step holes, etc. . In addition, the special honing head can also process conical holes, elliptical holes, etc., but due to the complex structure of the honing head, it is generally not used. The cylindrical body can be honed with an external honing tool, but the removal allowance is much smaller than that of the inner honing tool. Honing can process any material, and the application of diamond and cubic boron nitride abrasives further expands the application field of honing, and also greatly improves the efficiency of honing processing.
Fourth, the cutting allowance is small
In order to achieve the accuracy required by the drawings, honing processing is a processing method with less removal allowance among all processing methods. In the honing process, the honing tool uses the workpiece as a guide to remove the excess allowance of the workpiece to achieve the required precision of the workpiece. When honing, the honing tool first hones the place where a large allowance needs to be removed in the workpiece, and then gradually hones to the place where a small allowance needs to be removed.
5. Strong hole correcting ability
Due to the deficiencies in various other processing techniques, some processing defects will appear in the processing process. Such as: out of round, bell mouth, corrugated hole, small size, drum shape, taper, boring knife pattern, reamer pattern, rainbow shape, hole deviation and surface roughness, etc.
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