Advantage of Reducing and Sizing Machine TechniqueAuthor : yisainuo Time : 2016/12/26
1. Increasing the Machine Production
The design speed of RSM is 140 m/s, ensure the speed up to 11o m/s or more, exit speed of RSM basically stable up to 100 m/s.
Thus, the use of RSM technology can significantly increase the speed of the small size of the finishing product, thereby increasing the small size of the product machine production.
For example, Φ 5.5 mm wire finish rolling speed increased from 85 m/s to 110 m/s, its mill-hour output can be increased to 30%, Especially for small size products accounted for a higher proportion of total production, the production line can significantly increase or decrease the mill's annual loading rate.
2. Low-temperature High Speed and Controlled Rolling
RSM average rolling with low temperature of 750℃ ~ 800℃, in order to meet the requirements of controlled rolling γ + α two-phase region, which can effectively refine the grain size and improve the performance of wire products. Compared with the corresponding allowable rolling force with the previous design of finishing mill finished stand greatly improved, reducing mill, sizing mill respectively 330 kN, 130 kN.
3. Free Rolling Specifications
Using RSM technology can be certain specification range of free size rolling (without roll change can produce Φ5.25 mm, Φ5.75 mm and other special specifications of the products through the roll gap adjustment), thereby expanding the product specifications range, to meet the special requirements of users on the wire size. products designed grade differential is 0.5 mm.
4. Simplifying the Pass System
Since reducing mill has a large reduction ratio, rolling section can be flexibly adjusted appropriately which greatly simplifies the rough rolling, intermediate rolling, pre-finishing and finishing mill pass system.
5. Improving Product Precision
As a result of sizing machine, can be achieved precise rolling, the wire product size tolerance control ± 0.1 mm or less, ovality size is 60% of the total deviation, which for downstream metal products deep processing and standard production users extremely favorable.
6. Increasing the Metal Yield
After using reducing sizing rolling units, products dimensional accuracy is improved. Overall length dimensional accuracy uniformity better. Reduce the amount of loss can cut the head and tail portions of the ultra-poor, to effectively improve the metal recovery rate.
7. Improve Operation Efficiency of Rolling Mill
Due to simplify the pass system and improve the pass commonality, significantly reducing the amount of roll change when change specifications, the main rolling specifications of replacement focused on reducing sizing machine. Reducing sizing unit uses a set of special hydraulic disassembling tool to quickly change the reducing sizing mill collars, that is convenient and efficient. Reducing sizing mill can also use the quick-change collar device, the standby unit can pre-heating offline and install the collars, all of the fluid medium and detection signals are concentrated in the quick connection plate, and the use of quick-release type gear couplings, to achieve online quick-change operations. Thereby, greatly reducing the collars changing time, improve mill operating rate.
8. Improve Product Competitiveness
For normal wire rod, using reducing sizing mill technology can achieve cold rolling, can achieve product performance same as micro-alloying, so which can replace the micro-alloying process, thus, saving alloy material, effectively reduce production costs. For special wire rod, through the "free sizing" products with the precise dimensional tolerances, and after controlled rolling and cooling process to obtain fine grain structure, can reduce pickling dipping, drawing and annealing processes when drawing the cold heading steel and quality bearing steel, save raw materials and reduce costs. In addition plan, to ensure that in the case of frequently changing specifications still ensure highly yields and flexibility to adapt to marketing demand.