Shandong Shiheng Special Steel Wu Debao Foreword One of the core technologies of multi-line cutting technology is the rational application of high-hardness rolls (referring to high-speed steel, high-boron steel, tungsten carbide and other rolls). Fu Nike successfully solved the first high in China. The problem of hardness roll turning technology has promoted the development of domestic steel cutting technology. High hardness roll range: high steel volume, roll hardness of 80~90HSD, including high speed steel, high boron steel, tungsten carbide and other rolls. The actual hardness of the commercial roll is about 85HSD, and the hardness of the traditional casting roll is 55~75HSD. Features: The amount of steel is 3~5 times that of traditional rolls, high hardness, high wear resistance, difficult processing and high price. It is suitable for strip line rolling and rolling, and is gradually popularized and applied in bar rolling enterprises. 
Application effect Before 2006, domestic bar-line steel enterprises mainly used cast iron rolls, and there were only 3-5 users of high-speed steel rolls. The main reason is that there are no applicable tools (the imported tools are expensive and the cycle is long), the turning is difficult, and the processing time is long. In the case of increased equipment personnel, normal production cannot be met. Processing time comparison (specification φ370×650, total 24 slots) carbide tool 
It can be seen from the table that the processing time of the high speed steel roll is about 7 times that of the cast iron roll. Therefore, some units used to meet the needs of multi-line segmentation, using human sea tactics, the operator shift from 2 × 8h work system to 2 × 12h work system, double break is also changed to single break. Due to the heavy workload of the production, the operator only sharpens dozens of forming tools every day, and every day is so tired that the production is in trouble. In 2006, the use of Fu Nike PCBN tool, the processing efficiency increased by 5 times, the comprehensive processing efficiency increased by more than 3 times, the car work class of about 10 people guaranteed the roll hole type turning work of 4 bars of 4 bars, and the work system was restored to There are 8 hours of regular classes in the week. High-speed steel roll processing time comparison hardness 83HSD / specification φ370 × 650, machine tool C8450 / CK8450) 
Fin CBN tool and carbide tool car outer circle contrast live 
Comparison of Fu Nike CBN tool and carbide tool slot 
High-speed steel roll processing quality comparison §1 surface quality 
§ 2 geometry 
Comparison of PCBN tools and carbide tools 
Summary Since the use of Fenike CBN tools, Shandong Shiheng Special Steel has become one of the earliest steel companies in China that can skillfully process high-speed steel rolls, high-boron steel rolls and tungsten carbide rolls, and more than 20 steel companies visited the company each year. Family. Due to the processing technology of holding high-hardness rolls, Shiheng Special Steel flexibly applies various high-hardness rolls to the multi-line slitting rolling technology. Taking φ12 thread four-cut rolling as an example, the daily output is 1800t after adopting technology. /d (cast iron roll) is raised to 3600 t / d (high hardness roll), four-cut rolling relative to three cuts can increase the benefits of more than 600 million yuan per year. PCBN tool, routing and machine selection §1 Tool selection 
§2 Reasonable selection of process routes 
§3 Machine tool selection 
Fu Nike CBN tool CNC turning high speed steel roll 
Summary The Fu Nike CBN tool has high requirements on the skill level of machine tools, tools and operators when machining high-hardness rolls. Choosing the right tool, routing and sufficient processing time is an effective way to ensure the normal processing of high-hardness rolls without changing existing machine tools and personnel. It is recommended that steel companies should use CNC roll lathes as much as possible to expand the use of high-hardness rolls, which in turn will generate greater economic benefits. According to statistics, when the number of CNC roll lathes and ordinary roll lathes in steel enterprises is 1:3, the maximum benefit of personnel and equipment can be realized. PCBN tool guide bar line multi-line segmentation technology rapid development around 2006, 3 to 5 steel companies using split rolling technology, mostly using two-cut, three-cut process, subject to the difficulty of high-hardness roll processing The cutting process is developing slowly. Since 2010, domestic steel companies have fully supported the five-segment technology and have used the PCBN tool to solve the problem of high-hardness roll turning. Taking Shiheng Special Steel as an example, the production capacity of 3 million tons has achieved a profit of more than 700 million yuan for three consecutive years. In 2012, several new bar-line companies were adopting four-cut and five-cut rolling technologies, and the application of high-hardness rolls has driven the rapid development of the CBN tool industry. Fu Nike is the pioneer and navigator of high-hardness roll processing in China, which promotes the rapid development of bar-cutting and rolling technology.Laminate Flooring Mouldings,Flooring Accessory,Carpet Reducer
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