1660mm precision roll units for scale breaking machine face the same challenging issue:
During high-speed continuous scale-breaking operations, persistent friction between the roller body and steel strip generates substantial heat, causing rapid temperature spikes in the roll units that easily lead to thermal deformation. Warped roller surfaces result in irregular surface contours and thickness variations exceeding tolerance limits, rendering large quantities of strip material waste. Persistent high temperatures also accelerate roller wear, degrade lubrication effectiveness, cause bearing aging, increase failure rates, necessitate frequent equipment shutdowns for spare parts replacement, significantly reduce productive time, and elevate both raw material costs and operational expenses. Traditional single-pipe cooling systems exhibit limited spray coverage, uneven flow distribution, significant temperature gradients at roller ends, and inadequate thermal control performance—making them unsuitable for long-term high-intensity production of wide-width steel strips. In contrast, the 1660mm scale-breaking machine’s roll units equipped with an integrated multi-channel constant-temperature cooling system addresses thermal deformation challenges at their root, extending spare part lifespan by 30–40% compared to conventional designs.
This specialized cooling system is tailored for demanding 1660mm-wide operation, featuring a distributed multi-pipe spray configuration with precision-nozzle arrays and closed-loop water circulation. Cooling fluid evenly covers the entire roller surface without blind spots, continuously dissipating friction-generated heat and maintaining operating temperatures within the optimal range of 35–45°C. Compared to traditional single-point cooling systems, this multi-channel design offers greater heat exchange area and enhanced efficiency, effectively eliminating localized hotspots, preventing thermal warping, ensuring straight and aligned rollers throughout operation, and preventing surface defects such as wave patterns or thickness variations.
The roll units is constructed from high-strength alloy steel compliant with DIN 1.2344 standards, featuring a housing yield strength of 355 MPa. Its structural design has been optimized through finite element simulation to withstand up to 3000 KN rolling pressure while maintaining deformation below 0.1 mm under full-load conditions. The constant-temperature cooling system synergizes with the rigid structure to maintain stable low-temperature environments, preventing temperature-induced stiffness degradation and ensuring stable roller alignment even during continuous 24-hour operations. Equipped with precision-ground working rollers with a diameter tolerance of ±0.01 mm, the finished steel strips exhibit consistent dimensional tolerances of ±0.05 mm, fully meeting ASTM A568 international plate quality standards.
High temperatures are the primary cause of coating peeling on roller surfaces and bearing fatigue failure; the constant low-temperature environment significantly reduces thermal fatigue damage across components. Conventional roll unitses experience doubled surface wear rates and rapid lubrication failure under prolonged high-temperature operation, requiring complete replacement every few months. In contrast, the scale-breaking roll units with multi-channel constant-temperature cooling substantially reduces thermal loss, achieving a service life exceeding 20,000 hours at full load – representing a 30–40% improvement over conventional models and significantly lowering spare part procurement frequency and maintenance costs.
This product is compatible with all metal strip specifications ranging from 0.5 to 12 mm and finds extensive applications in automotive body substrates, appliance metal casings, structural steel plates for construction, and acid treatment processes for aerospace-grade special alloys. The roll units features a modular quick-release design, enabling complete roller shaft replacement in just 15–30 minutes. Its servo-driven roll gap adjustment system supports real-time switching of process parameters within seconds. The integrated cooling water circuit eliminates the need for separate disassembly and maintenance, avoiding additional operational burdens.
Numerous 1660 mm cold rolling and pickling plants have reported tangible improvements post-upgrade: scrap volume caused by thermal deformation of steel strips has significantly decreased, spare part replacement cycles have markedly extended, and monthly operation and maintenance costs continue to decline. For cold rolling and pickling facilities operating at full capacity long-term, the multi-channel constant-temperature cooling system serves not only as a complementary solution for enhancing finished product quality but also as a critical component for extending spare parts service life, stabilizing production line output, and achieving sustained cost reduction and efficiency improvement.
