What are the characteristics of honed tube?

- May 07, 2019-

High machining accuracy: especially for small and medium-sized through holes, the cylindricity can be up to 0.001mm. Some parts with uneven wall thickness, such as connecting rods, have a roundness of 0.002 mm. For large holes (with a hole diameter of 200 mm or more), the roundness can also reach 0.005 mm. If there is no ring groove or radial hole, it is possible that the straightness is within 0.01 mm/1 m. Honing is more accurate than grinding because the bearings that support the grinding wheel during grinding are located outside the bore, which can cause deviations, especially for small holes, and the grinding accuracy is even worse. Honing generally only improves the shape accuracy of the workpiece, and it is necessary to take some necessary measures to improve the positional accuracy of the part. If the panel is used to improve the perpendicularity of the end face of the part and the axis (the panel is mounted on the stroke bracket, the adjustment is made perpendicular to the rotating spindle, and the part is machined on the panel).


Good surface quality: the surface is cross-grain, which is beneficial to the storage of lubricating oil and the maintenance of oil film. It has a high surface support ratio (the actual contact area between the hole and the shaft and the ratio of the area of the joint between the two), so it can withstand large loads and wear resistance, thereby improving the service life of the product. The honing speed is low (one tenth of the grinding speed), and the oil stone is in surface contact with the hole, so the average grinding pressure of each abrasive grain is small, so that the honing time of the workpiece is small, and the surface of the workpiece is almost No thermal damage and metamorphic layer, small deformation. The honing machined surface has almost no sand and extruded hard layers.

Honing tube


Wide processing range: mainly processing various cylindrical holes: through holes, axial and radial discontinuous holes, such as holes with radial holes or slots, keyway holes, spline holes, blind holes, multi-step holes, etc. In addition, with a special honing head, it is also possible to machine tapered holes, elliptical holes, etc., but because the boring head has a complicated structure, it is generally not used. The cylindrical honing tool can be used to honing the cylinder, but the amount of removal is much less than the allowance for the inner honing. The honing can be used to process almost any material, especially diamond and cubic boron nitride abrasives, further expanding the field of honing and greatly improving the efficiency of honing.


Less cutting allowance: In order to achieve the precision required by the drawings, honing is the processing method that removes the least amount of allowance in all processing methods. In the honing process, the honing tool uses the workpiece as a guide to cut off the excess allowance of the workpiece to achieve the required precision of the workpiece. When honing, the honing tool first picks up the place where the allowance is the largest, and then gradually picks up the place where the least amount of allowance is needed.


Strong ability to correct holes: Due to the lack of various other processing techniques, some processing defects will occur during the processing. Such as: out of round, bell mouth, corrugated hole, small size, waist drum shape, taper, trowel pattern, reamer pattern, rainbow shape, hole deviation and surface roughness (see Figure 2). The honing process can greatly improve the dimensional accuracy, roundness, straightness, cylindricity and surface roughness of the holes and the outer circle by removing the minimum machining allowance.