Cutting Force Model of SiCp/Al Composites in Ultrasonic Elliptical Vibration Assisted Cutting with Negative Rake Angle

IF 2.3 4区 材料科学 Q3 MATERIALS SCIENCE, COMPOSITES
Limin Zhang, Zhuoshi Wang, Jiakang Zhou, Mingming Lu, Yongsheng Du, Hong Gong
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Abstract

SiCp/Al composites are widely used in many important engineering applications due to their excellent material properties. High-volume fraction SiCp/Al composites are recognised as a typical difficult-to-machining material with significant brittleness, and negative rake angles are more suitable for cutting brittle materials. Ultrasonic elliptical vibration cutting (UEVC) has proven to be a specialised machining method that can improve the machinability of difficult-to-machining materials. Elucidating the influence of the negative rake angle on the dynamic properties of composites during UEVC is therefore particularly important. In this paper, the direction of the combined cutting force is considered separately for negative rake angle tools, as well as UEVC's unique transient cutting thickness, variable cutting angle, transient shear angle and characteristic of friction reversal, a UEVC cutting force model based on negative tool rake angle has been developed. And the deviation of the main cutting force between the experimental value and the theoretical value is less than 15% by systematic turning experiments, which verifies the accuracy of the model. Finally, the influence of different machining parameters on the cutting force is determined using the established model. The results show its effect on the cutting force is more significant when the cutting speed is less than 200 mm/s, other things being equal. In addition, the cutting force tends to decrease significantly as the depth of cut from 5 μm to 20 μm increases. However, the cutting force fluctuated less when the feed was increased. This work provides the benchmark for negative rake angle cutting of SiCp/Al.

Abstract Image

负耙角超声波椭圆振动辅助切割 SiCp/Al 复合材料的切割力模型
SiCp/Al 复合材料因其优异的材料性能而被广泛应用于许多重要的工程领域。高体积分数 SiCp/Al 复合材料被认为是一种典型的难加工材料,具有明显的脆性,而负前角更适合切割脆性材料。事实证明,超声波椭圆振动切割(UEVC)是一种专门的加工方法,可以提高难加工材料的可加工性。因此,阐明负前角在 UEVC 过程中对复合材料动态特性的影响尤为重要。本文分别考虑了负前角刀具的综合切削力方向,以及 UEVC 独特的瞬态切削厚度、可变切削角、瞬态剪切角和摩擦反转特性,建立了基于负前角刀具的 UEVC 切削力模型。通过系统车削实验,主切削力实验值与理论值的偏差小于 15%,验证了模型的准确性。最后,利用建立的模型确定了不同加工参数对切削力的影响。结果表明,在其他条件不变的情况下,当切削速度小于 200 mm/s 时,其对切削力的影响更为显著。此外,随着切削深度从 5 μm 到 20 μm 的增加,切削力有明显下降的趋势。然而,当进给量增加时,切削力波动较小。这项工作为 SiCp/Al 的负前角切削提供了基准。
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来源期刊
Applied Composite Materials
Applied Composite Materials 工程技术-材料科学:复合
CiteScore
4.20
自引率
4.30%
发文量
81
审稿时长
1.6 months
期刊介绍: Applied Composite Materials is an international journal dedicated to the publication of original full-length papers, review articles and short communications of the highest quality that advance the development and application of engineering composite materials. Its articles identify problems that limit the performance and reliability of the composite material and composite part; and propose solutions that lead to innovation in design and the successful exploitation and commercialization of composite materials across the widest spectrum of engineering uses. The main focus is on the quantitative descriptions of material systems and processing routes. Coverage includes management of time-dependent changes in microscopic and macroscopic structure and its exploitation from the material''s conception through to its eventual obsolescence.
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