What is Honing Tube ?
Honing tube are seamless steel tubes that have been honed.
Honing is a kind of mechanical processing technology. By means of high-speed reciprocating honing process of honing head on the inner wall of cold drawn seamless pipe, to ensure the inner hole can meet the requirements on tolerance, size and surface roughness.
What are the characteristics and advantages of honing pipes?
1. High machining accuracy
In particular, some small and medium-sized hole, their cylindricity can be up to 0.001mm.
Parts with uneven wall thickness, such as connecting rods, can be as rounded as 0.002mm.
For large holes (over 200mm in diameter), roundness can be up to 0.005mm. If there are no ring grooves or radial holes, straightness within 0.01mm/1m is also possible. Honing has a higher precision than grinding, because the bearing supporting the grinding wheel is located outside the honing hole during grinding, and the grinding accuracy will be worse, especially for hole machining.
Generally, honing can only improve the shape accuracy of the workpiece to be processed. To improve the position accuracy of the part, some necessary measures should be taken.
For example, the panel can be used to improve the perpendicularity of the end face of the part and the axis (the panel is installed on the stroke bracket and adjusted so that it is perpendicular to the rotating spindle, and the part can be processed by leaning on the panel).
2. Good surface quality
The surface is cross – mesh, which is good for the storage of lubricating oil and the maintenance of oil film.
It has a high surface bearing rate (the ratio between the actual contact area of the hole and the shaft and the fitting area between the two), so it can bear a large load and wear resistance, thus improving the service life of the product. The honing speed is low (one-tenth of the grinding speed), and the whetstone is in contact with the hole, so the average grinding pressure of each abrasive is small. In this way, the heating energy of the workpiece during honing is very small, and the surface of the workpiece is almost free from thermal damage and metamorphism, and the deformation is small. The honing surface has almost no embedded sand and extrusion hard layer.
3. Wide processing range
Main processing all kinds of cylindrical holes: through hole, axial and radial discontinuous hole, such as radial hole or slot hole, keyway hole, spline hole, blind hole, multi-step hole, etc.
In addition, the honing head can also be used to process cone hole, ellipse hole, etc. However, because of the complex structure of the honing head, it is generally not used.
It is possible to hone the cylinder with the cylindrical honing tool, but the margin removed is much less than that of the inner honing. Honing can be used to process materials, especially diamond and cubic boron nitride abrasives, which further expand the application of honing and greatly improve the efficiency of honing.
4. Low cutting margin
In order to achieve the precision required by the drawing, honing is one of the machining methods that can remove less margin. In honing, the tool takes the workpiece as the guide to cut out the excess residue to achieve the desired accuracy. When honing, the honing tool should first remove the large margin in the workpiece and then gradually remove the small margin.
5.Strong hole correction ability
Due to the lack of other processing technology, there will be some processing defects in the process, such as: out of circle, flared mouth, wavy hole, small size, waist drum shape, taper, boring pattern, reamer pattern, rainbow shape, hole deviation and surface roughness, etc. By using honing process, the dimensional accuracy, roundness, straightness, cylindricity and surface roughness of holes and outer circles can be improved by removing less machining allowance.
Honing pipe is a kind of high precision steel pipe material after being cold-drawn or hot-rolled.
Because the inner and outer wall of the precision steel tube has no oxide layer, no leakage under high pressure, high precision, high finish, no deformation during cold bending, no flaring, flattening and other advantages, it is mainly used for the production of pneumatic or hydraulic components of products.
Honing tubes are widely used in the production of hydraulic cylinders, as well as a variety of high-precision equipment. It is widely used in construction machinery, lifting transport machinery, petrochemical oil pump, coal mine pillar, automobile shock absorber, internal combustion engine oil pipe, concrete conveying cylinder, roller sleeve and other industries.