A honed tube is a steel tube with a precision-processed inner surface, which has a high-precision inner diameter and good surface finish. Its main feature is that the inner surface is processed by a honing process, and is usually used in situations where a high-precision, high-finish inner hole is required, such as the manufacture of mechanical equipment such as hydraulic cylinders and cylinders.
The production process of a honed tube mainly includes:
Raw material selection: Select suitable steel, such as low-carbon steel, medium-carbon steel or alloy steel.
Cold drawing or cold rolling: The steel tube is processed by cold drawing or cold rolling to achieve the initial size and mechanical property requirements.
Heat treatment: Heat treatment is performed on the steel tube after cold drawing or cold rolling to eliminate internal stress and improve the comprehensive performance of the material.
Rough processing: The steel tube is processed with preliminary inner and outer diameters to approach the final size.
Honing processing: Use a honing machine to perform precision inner hole processing to achieve the required finish and dimensional accuracy on the inner surface.
Inspection: Inspect the size and surface quality of the finished tube to ensure that it meets the standard requirements.
According to different uses and processing methods, honing tubes can be divided into the following categories:
Hydraulic cylinder tubes: used to manufacture hydraulic cylinder barrels, requiring high precision and high finish.
Cylinder tubes: used for cylinder barrels in pneumatic systems.
Tubes for machining: used to manufacture precision mechanical parts.
Bearing sleeves: used to manufacture inner and outer sleeves of bearings.
Main features of honing tubes
High-precision inner diameter: The inner diameter size precision treated by the honing process is high, and can usually reach a tolerance range of micron level.
High surface finish: The inner surface finish is high, which reduces friction resistance and improves service life and performance.
Good concentricity: The honing process can ensure the concentricity of the inner hole of the pipe and improve its stability in use.
Common materials for honing tubes are:
Low carbon steel: such as 10# and 20# steel, with good toughness and machinability.
Medium carbon steel: such as 45# steel, with high strength and hardness.
Alloy steel: such as 16Mn, 40Cr, GCr15 steel, with excellent comprehensive mechanical properties.
Stainless steel: such as 304, 316L stainless steel, with excellent corrosion resistance.
Standards for honing tubes
Processing methods of honing tubes
Cold drawing: Improve the dimensional accuracy and surface quality of steel pipes through cold drawing process.
Honing: Use honing tools to precisely process the inner hole of the steel pipe to achieve the required finish and dimensional accuracy.
Common production and inspection standards for honing tubes include:
DIN 2391: German industrial standard for cold-drawn or cold-rolled precision seamless steel pipes.
EN 10305: European standard for cold-drawn seamless steel pipes and welded steel pipes.
ASTM A519: American Society for Testing and Materials standard for seamless carbon steel and alloy steel mechanical pipes.
GB/T 8713: Chinese national standard for precision inner diameter seamless steel pipes for hydraulic and pneumatic systems.
Steel grade of honing tube
10#, 20# steel: low carbon steel, good toughness, easy to process.
45# steel: medium carbon steel, high strength, suitable for manufacturing mechanical parts.
16Mn: low alloy high strength steel, with good comprehensive mechanical properties.
40Cr: alloy structural steel, good hardenability, often used to manufacture high strength parts.
GCr15: high carbon chromium bearing steel, good wear resistance, often used to manufacture bearings.
Honing tubes are widely used in the following fields:
Hydraulic and pneumatic systems: used to manufacture hydraulic cylinders and cylinder barrels, requiring high precision and high finish.
Automobile manufacturing: used to manufacture automotive parts, such as shock absorbers, steering system components, etc.
Machinery manufacturing: used to manufacture various precision mechanical parts, such as bushings, sliding bearings, etc.
Aerospace: used to manufacture high-precision and high-reliability aerospace parts.
Honed tube is a steel tube with precision machined inner surface. It has high precision, high finish and good performance. It is widely used in industrial fields that require high precision and high reliability.
