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About machining

Writer:    Published:2010-06-18    Hits:1

        As wear-resistant rolls have relative high hardness, they pose greater difficulty to grooves of turning and milling than ordinary cast iron rolls. The boron alloy rolls developed by 3T contains a high content of chromium, molybdenum, and boron. With good toughness, this boron alloy is not easy to break chips during turning, but it requires special attention paid to the following aspects.

        First of all, turning and milling tool selection. When using YG6 for turning and milling, the speed is only half of the normal speed. It is recommended to use YD150 hard alloy turning and milling tools. During operation, the rotational speed of YD150 can be set at 60-90 rpm; when milling crescent-shaped groove, it can be set at normal or slightly lower speed. No matter which cutter is selected, the depth of cut should be less than machining cast iron rolls. Cutting speed must be slowed down in re-used because of the interruption during the process of machining. The feed volume, manual feed should be controlled in the same time. Suddenly feed will not only cause damage to cutting tools and collapse rolling groove, but also lead to compression hardening, the point would be hard squeeze point and affect subsequent processing.
        Secondary processing may jump due to crescent-shaped groove; therefore, it is important to slower the rotational speed and reduce the depth of cut. When feeding a tool manually, sudden moves should be avoided, because they may not only lead to jumps and cutter or/and grooves damages, but also cause hard points due to squeeze, which affects subsequent processing.
       3T can provide applicable turning and milling tools.