Product Introduction
High-precision seamless honed tube is a seamless cold-drawn/cold-rolled steel tube specifically manufactured for high precision, high wear resistance, and high sealing requirements. Through precision honing, it achieves extremely high internal surface finish, dimensional accuracy, and pressure resistance, and is widely used in hydraulic systems, pneumatic systems, construction machinery, automotive manufacturing, petrochemicals, and other fields.
Technical Specification
|
Rod Diameter |
30-150MM |
|
Outer Tube Diameter |
30-150 |
|
Condition |
New |
|
Type |
Fittings |
|
Material |
K45/ ST52/ 20MnV6/ 42CrMo4/ 40Cr/ bearing steel |
|
Tolerance |
f7 |
|
Chrome thickness |
0-30μm(min) or According to customer's requirement |
|
Roughness |
ra0.4um |
|
Straightness |
0.2mm/M |
|
Surface Hardness |
HV800 (min) |
|
Size |
30250mm |
|
Packaging Details |
1.bundle with steel strips |
Production Process Flow
1. Raw Material Selection: High-quality hot-rolled or cold-rolled seamless steel pipes are selected.
2. Pre-treatment: Including straightening, cutting, pickling, and phosphating, preparing for subsequent cold drawing.
3. Cold Drawing/Cold Rolling: Drawing or rolling using dies to initially obtain the required external dimensions and high internal surface quality.
4. Heat Treatment: Normalizing or annealing to eliminate stress generated during cold working and homogenize the microstructure and properties.
5. Precision Straightening: Ensuring the straightness of the steel pipe.
6. Precision Honing (Core Process): Using a honing head and honing stone, the inner bore of the steel pipe is precision machined to achieve the predetermined dimensional accuracy, geometric accuracy, and surface roughness.
7. Cleaning and Rust Prevention: Thoroughly cleaning the inside of the pipe to remove residual honing material and metal shavings, and performing rust prevention treatment (such as oiling).
8. Final inspection and packaging: 100% inspection of dimensions, surface quality, etc., and packaging and warehousing after passing the inspection.
Application Scenarios
1. Hydraulic and Pneumatic Systems: Serving as the base material for hydraulic and pneumatic cylinders, ensuring smooth piston movement and sealing performance.
2. Machining: Used for spindle sleeves and guide sleeves in precision machine tools, as well as transmission components in automated equipment.
3. Construction Machinery: Adapted to hydraulic actuators in excavators, cranes, and other equipment, withstanding high pressure and vibration under complex working conditions.
4. Automotive and Rail Transportation: Used as a key tubular component in automotive shock absorbers and rail transportation braking systems.
Core Advantages
1. Improved Equipment Efficiency: High-precision internal bores reduce component clearances, lower energy loss, and improve hydraulic system response speed.
2. Extended Service Life: Smooth inner surfaces reduce wear on seals, pistons, and other accessories, lowering equipment maintenance frequency and costs.
3. Simplified Subsequent Processing: High dimensional accuracy of finished tubing allows for direct assembly, reducing secondary processing steps for users. 4. Adaptable to complex working conditions: It has both high strength and fatigue resistance, and can work stably in a temperature range of -40℃ to 120℃ and a high pressure (≤35MPa) environment.
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