Working roll bearing seat on the operating side of the hot rolling mill
The core function and working condition requirements of the working roll bearing seat on the operating side of the hot rolling mill
Core functions
Roll positioning and support: bear the radial load (1500-4000kN on one side) and axial force (≤ 10% radial force) of hot rolling mill work roll.
Quick roll change interface: Integrated hydraulic locking mechanism (pressure 20-25MPa), roll change time ≤ 15 minutes.
Thermal deformation compensation: At a rolling temperature of 300-600 ℃, the axial thermal expansion gap is reserved at 0.1-0.15mm/100 ℃.
- Guangwei Manufacturing Precision
- Henan，Luoyang
- Contractual Stipulation
- Anual Capacity is 500 pieces
- Information
Working roll bearing seat on the operating side of the hot rolling mill
Compatible models
4-high hot rolling mill: strip width 800-2200mm, rolling speed ≤ 12m/s.
Reversible roughing mill: rolling force fluctuation ± 25%, impact load frequency ≥ 5 times/minute.
Specification for Material and Heat Treatment of Working Roll Bearing Seat on the Operating Side of Hot Rolling Mill
Working roll bearing seat main material
Cast steel grade: ZG35CrNiMo (optimized composition)
Element | C 0.32-0.38 | Cr 0.8-1.2 | Ni 1.0-1.5 | Mo 0.2-0.4|
Performance characteristics:
High temperature yield strength (σ ?. ? ≥ 550MPa at 500 ℃);
Low temperature impact energy (-20 ℃ AKV ≥ 50J).
Key component materials
Component material heat treatment surface treatment
ZG35CrNiMo quenched and tempered bearing seat body+stress relief shot peening strengthening (Sa2.5)
Wear resistant lining plate 42CrMo4 induction quenched hard chromium plating (30-50 μ m)
Sealing component 316L stainless steel solid solution treatment electrolytic polishing
Heat treatment process
Quenching: 850 ± 10 ℃ × 4h (oil cooling, cooling rate ≥ 80 ℃/s);
Tempering: 580 ± 10 ℃ × 6h (air cooling, hardness control HB 280-320);
Cryogenic treatment:- 80 ℃ for 2 hours (to improve dimensional stability).
Mechanical processing and assembly accuracy of the working roll bearing seat on the operating side of the hot rolling mill
Critical dimensional tolerances
Project tolerance testing methods
Bearing hole diameter (Φ) H6 level (± 0.015mm) pneumatic meter+three coordinate system
Installation surface flatness ≤ 0.02mm/m electronic level
Hydraulic oil circuit cross hole chamfer R0.5 ± 0.1mm industrial endoscope
Assembly requirements of working roll bearing seat of hot rolling mill
Bearing preload force: Axial preload of tapered roller bearings is 0.05-0.08mm (measured by a dial gauge);
Sealing clearance: radial 0.3-0.5mm (labyrinth seal), axial 1.0-1.2mm.
The above advantages of our company in the production of bearing seat make our company in the advanced position in the production of bearing block products domestically.production orders in the industry leading. The staff of the company will learn the advanced management ideas of the same industry in the future production and processing, so that the company can better serve customers and grow together with customers.
Packing
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