Dynamice Balancing Test On Steel Spool Of Sheet And Strip Mill Machine

Dynamice Balancing Test On Steel Spool Of Sheet And Strip Mill Machine

Product Infromation 

Steel Spool Of Sheet And Strip Mill Machine material is 35CrMoV, and the specification is Φ554*Φ504*1625.

The 35CrMoV steel sleeve (subject to dynamic balance test) in the plate and strip mill is a key component for high-speed and high-precision rolling, which requires high strength, wear resistance and dynamic balance performance.

Application Scenario of 35CrMoV Steel Sleeve of Plate and Strip Mill (Dynamic Balance Test)

Strip mill roll system

Work roll/support roll bearing sleeve: cold/hot rolled strip mill (such as stainless steel, carbon steel and copper-aluminum strip) for high-speed rolling (linear speed ≥ 10m/s), bearing alternating load and impact vibration.

Dynamic balance requirements: dynamic balance test shall be carried out when rotating speed exceeds 500rpm (residual unbalance ≤ 1g · cm/kg) to avoid bearing failure or uneven thickness of plate and strip caused by vibration during high-speed rotation.

High precision rolling

Backing bearing sleeve for six-high/20-high rolling mill is required to have dimensional stability (roundness ≤ 0.02mm) to ensure the accuracy of shape control.

Heat Treatment Process of 35CrMoV Steel Sleeve of Plate and Strip Mill (Dynamic Balance Test)

Hardening and tempering treatment (core process)

Quenching: 880-900 ℃ oil quenching after austenitization (large section needs water quenching+oil cooling dual medium quenching), ensure hardness HRC 45-50.

High-temperature tempering: heat preservation at 600-650 ℃ for 3-5 hours to obtain tempered sorbite, with tensile strength ≥ 1100MPa and impact energy ≥ 50J.

Stress relief annealing

Heat preservation for 4 hours at 620 ℃ after rough machining to eliminate machining stress (prevent dynamic balance failure).

Surface strengthening (optional)

Ion nitriding: surface hardness ≥ HV 1000, carburizing layer 0.3-0.5mm, reducing friction coefficient (applicable to cold rolled sleeve).

Advantages of GW precision's spool

1. GW precision has our own professional processing of the design, develop and manufacture, also has proven machining technique. 
2. GW precision has a well-developed management system. Meanwhile, our employees are highly qualified and skilled. 
3. GW precision has a perfect management system of the guarantee of the after-sales service. 
GW Precision implements humanized management, creates a warmth of the working environment, and establishes a win-win business platform. The single silk does not become the thread, the individual tree does not become the forest, GW precision is willing to multiple parties collaborate together and help each other forward.