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Yan Q.,Guangdong University of Technology | Zhao X.,Guangdong University of Technology | Lu J.,Guangdong University of Technology | Li Z.,Guangzhou Ribao Steel Coil Center Ltd. | Huang S.,Guangzhou Ribao Steel Coil Center Ltd.
Zhongguo Jixie Gongcheng/China Mechanical Engineering | Year: 2014

The force of disc cutter was analyzed in the disc slitting process, and the slitting experiments of silicon steel sheet using carbide alloy disc cutter were conducted to study the wear process of the disc cutter. The surface topography, microstructure and percentage variation of Co-content before and after wear of the carbide alloy disc cutter were compared, and the wear mechanism of the disc cutter was investigated. Experimental results indicate that the wear of carbide alloy disc cutter mainly occurs on the side of the cutting edge. The fillet radius of the cutting edge becomes bigger and the cutting edge of the disc cutter becomes blunt with the wear of the disc cutting tool. The wear mechanism of the disc cutter is mainly the loss of bonded phase cobalt, fatigue wear causing the desquamation of WC grain and adhesive wear. Source


Yan Q.,Guangdong University of Technology | Huang S.,Guangzhou Ribao Steel Coil Center Ltd. | Li Z.,Guangzhou Ribao Steel Coil Center Ltd. | Pan J.,Guangdong University of Technology | Lai Z.,Guangdong University of Technology
Zhongguo Jixie Gongcheng/China Mechanical Engineering | Year: 2012

Based on analyzing the metal strips slitting processing and its main defects as well as the deburring technology, a new technology of metal strips precision slitting with no-burr was proposed. The upper and the lower pair of disc cutter to axial negative clearance and radial positive clearance were set so that the sheet metal surface formed shear incision that not separated, then additional pressure-roller made plastic shear oppression separation, which was ductile fracture separation of the residual material layer in the cutting process to control material stress and strain state. The no-burr precision slitting process is achieved by setting the upper and the lower pair of disc cutter clearance to make the material of cutting edge action zone in compressive stress state and form incision by plastic shear deformation. Source


Lu J.-B.,Guangdong University of Technology | Li S.,Guangdong University of Technology | Yan Q.-S.,Guangdong University of Technology | Xie Z.-P.,Guangzhou Ribao Steel Coil Center Ltd. | And 2 more authors.
Suxing Gongcheng Xuebao/Journal of Plasticity Engineering | Year: 2014

The disc slitting machining experiments for the electromagnetic steel sheet were conducted to investigate the wear process of carbide alloy disc cutter and its effect on the slitting quality in the disc slitting process, and the blade contour shape and wear of disc cutter and the slitting surface morphology of electromagnetic steel sheet were examined by the surface profiler and optical microscopy. The results show that wear of disc cutter mainly presents the increase of the blade radius and side wear zone of the cutter, and the surface roughness of the cutter cylindrical surface does not almost change. As the slitting length increases, both the blade radius and the side wear zone of the disc cutter increase, so the cutter's wear becomes serious. The wear of the disc cutter influences directly the slitting quality of the electromagnetic steel. The quality of the slitting surface will deteriorate when the slitting length of the disc cutter is more than 8000m and the blade radius is over 43 μm. The optimum parameters of the carbide alloy disc cutter are: the slitting length is less than 8000m and the blade radius is less than 43 μm. ©, 2014, Beijing Res. Inst. of Mechanical and Elec. Technology. All right reserved. Source


Yan Q.-S.,Guangdong University of Technology | Lai Z.-M.,Guangdong University of Technology | Lu J.-B.,Guangdong University of Technology | Li Z.-R.,Guangzhou Ribao Steel Coil Center Ltd. | Ouyang J.,Guangzhou Ribao Steel Coil Center Ltd.
Suxing Gongcheng Xuebao/Journal of Plasticity Engineering | Year: 2013

Based on principle of negative clearance blanking processing, the disc-cutter slitting process was considered as two stages, the plastic shearing and the oppression separation, in order to control material stress states in slitting process. This paper proposed a new disc-cutter slitting method, i.e. the plastic shearing oppression separation precision slitting technique. Precision cutting technology with burr-free was researched by the experiments for the galvanized sheet. The material deformation process of plastic shearing oppression separation and plate mechanical characteristics were analyzed. The microscopic morphology characteristics of the slitting section by the new technique were studied, including double rollover, double shear and fracture of the central section, and compared with the slitting section of the traditional disc-cutter shearing process. The experimental study indicated that the plastic shearing oppression separation precision slitting technique could eliminate burr and improve the slitting quality. Source


Yan Q.-S.,Guangdong University of Technology | Lai Z.-M.,Guangdong University of Technology | Lu J.-B.,Guangdong University of Technology | Li Z.-R.,Guangzhou Ribao Steel Coil Center Ltd. | And 2 more authors.
Suxing Gongcheng Xuebao/Journal of Plasticity Engineering | Year: 2014

The characteristics of the slitting surface morphology and the influence of the slitting clearance between the neighboring disc cutters on the morphology characteristics, such as the shear area, fracture area, rollover, tearing angle and burr, were investigated through the disc slitting machining experiments for the galvanized steel sheet in this paper. The experimental results show that the clearance is a key machining parameter affecting the slitting surface morphology. With the increase of the clearance, the height of shear area decreases rapidly, the rollover and the tearing angle increase linearly, but the burr increases at first, and then decreases, and increases sharply again. When the clearance is smaller, the slitting surface is dominated by the ductile shear area, and the surface has high quality and precision. At a large clearance, most of the slitting surface is the rough fracture area, the surface quality and precision is poor. The slitting surface is ideal when the clearance is 1. 25 % to 2. 50 % of the sheet thickness. Source

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