【Ten Years of Rapid Development in Chemical Processing Equipment】China’s Largest-Diameter Three-Roll Skew Rolling Tube Mill from 1985 to 2021
Thread Content
Ten years of rapid development in chemical engineering technology – praise for China’s prosperity and strength. This is just a starting point; more participation will make things even more lively. HaiChuan becomes even better with your involvement; we welcome everyone to join in the forum discussions. Be careful with fire risks as the heat increases in July. -------------------------------------------- At 8:28 p.m. on November 30, 2021, the new three-roll skew rolling mill at Plant 720 of Hengyang Valin Cold Rolling Tube Co., Ltd., whose design and equipment supply were provided by MCC SEDI, was successfully tested under operational conditions. This equipment was designed by MCC SEDI and manufactured by MCC SEDI’s SEDI Equipment Company. It represents the largest domestic three-roll skew rolling mill of its kind, breaking the monopoly of imported equipment in the domestic market and achieving full domestic production for such machinery, from design to assembly and manufacturing. The main products of this project are seamless steel tubes such as those used in high-pressure boilers, structural applications, fluid transportation, hydraulic props, petroleum machinery processing, cylinders, and crane booms. These products will be widely utilized in industries such as construction, pipeline transportation, and mechanical equipment. Once the project is put into operation, it will optimize the existing production process, improve product quality, reduce production costs, and enhance the economic efficiency of the steel plant. During the design of this rolling mill, MCC SDI employed forward 3D digital design, and CAE simulation analysis was used for key components. It incorporates a number of core technologies such as an independently developed process control model, ultra-high pressure hydraulic control technology for rapid roll opening, control technology for stability during alternating heavy-load operations, and high-flow hydraulic speed limitation control technology. A pass shape and setting system is used to enable fully automatic parameter setting, resulting in high product quality and high dimensional accuracy.
The three-roller skew rolling tube mill designed by MCC Sedi is intended for the production of large-diameter seamless steel tube products with an outer diameter ranging from Φ273mm to Φ508mm, with an annual production capacity of 300,000 tons. Once put into operation successfully, this unit will be the largest diameter skew rolling tube mill in China. The three-roll skew rolling mill has a complex structure and large size, weighing over 200 tons. The mill frame, as the core component of this equipment, makes the research on manufacturing techniques a key factor for the successful implementation of the project. The manufacturing process requires proficient mastery and application of welding techniques for 250-millimeter-thick plates and forged T-shaped components, as well as machining and assembly techniques for large-scale structural parts. In response to this, the CCID Equipment Product Design Research Institute has developed a series of specific project implementation plans through in-depth research and analysis. During the frame welding process, the manufacturing center overcomes the challenges posed by welding preheating, strictly controls the quality of each machining step, ensures perfect fusion of the connecting materials, and guarantees that all specifications meet the required standards. The welding of the current rolling mill frame has been completed, and it successfully moved on to the machining process on August 26.
It’s all in the industry information section now