摘要
45号钢是一种优质的碳素结构钢,因其具有良好的物理化学性能,成为了各行各业应用最广泛的工程材料之一。本文以调质45钢为工件材料,采用干式切削实验研究不同槽型几何参数对半精加工C型刀片切削调质45钢时的切削力和断屑性能的影响规律。结果显示:刀片的第一前角与反屑角都会影响切削力的大小,但第一前角的影响更为显著,适当地增加第一前角,有利于减少切削力,并求出不同切深下,切削力与第一前角的线性方程;刀片的断屑能力主要与反屑角的大小有关,适当地增大反屑角,有利于提高刀片的断屑性能;对于45号钢材料的半精加工,将刀片的第一前角控制在10°~15°,同时,本文获得了切削速度为200 m/s时,正常断屑范围的刀片反屑角与切深和进给率的量化关系,在不引起切削力显著增大的前提下,将反屑角提升至30°以上,可以获得良好的断屑性能。
45 steel is a high-quality carbon structural steel, because of its good physical and chemical properties, has become one of the most widely used engineering materials in all walks of life. This paper selects quenched and tempered 45 steel as experiment material, studying the effect of different groove geometry parameter on the cutting force and chip breaking properties of C-type semi-finished inserts by dry cutting experiment. The results show: the first front angle and anti-chip angle of the inserts will affect the cutting force, and the influence of the first front angle is more significant, appropriately increasing the first front angle is conducive to reduce the cutting force. The linear equation of cutting force and first front angle at different cutting depth is obtained. The chip breaking ability of inserts is related to the size of anti-chip angle. Increasing the anti-chip angle appropriately is beneficial to improve the chip breaking performance. For semi-finishing 45 steel, the first front angle of the insert control in 10°~15°. At the same time, this paper obtains the quantitative relationship of anti-chip angle, cutting depth(ap) and feed rate(f) of the insert in the normal chip breaking range at the cutting speed of 200 m/s. It obtains a good performance of chip breaking when the anti-chip angle is increased over 30° without no significant increase in cutting force and over breaking chip.
作者
叶延挥
高江雄
杨泊莘
雷学林
Ye Yanhui;Gao Jiangxiong;Yang Boxin;Lei Xuelin(School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,China;Zhuzhou Huarui Precision Cutting Tools Co.,Ltd.Zhuzhou Hunan 412000,China)
出处
《硬质合金》
CAS
2019年第6期440-446,共7页
Cemented Carbides
基金
国家科技重大专项汽车发动机关键部件成套刀具应用示范（2018ZX04040-001）
上海市青年科技英才扬帆计划项目航空航天用高温合金的高效切削加工工艺研究（17YF1403100）
关键词
45号钢
切削力
槽型
断屑
45 steel
cutting force
groove profile
chip breaking
