Surface Integrity of Clean Machined Titanium Alloy Based on Net Specific Cutting Energy

被引：0
|
作者：
Li A.-H. [1 ,2 ,3 ]
Zhang R.-F. [1 ,2 ,3 ]
Zhao J. [1 ,2 ,3 ]
Zhou Y.-H. [1 ,3 ]
Wei S.-L. [4 ]
机构：
[1] National Demonstration Center for Experimental Mechanical Engineering Education, Shandong University, Jinan
[2] Shelfoil Petroleum Equipment & Services Co., Ltd, Dezhou, Shandong
来源：
Surface Technology | 2023年 / 52卷 / 12期
基金：
中国国家自然科学基金;
关键词：
clean cutting; milling; net specific cutting energy; process signature; surface integrity; titanium alloy;
D O I：
10.16490/j.cnki.issn.1001-3660.2023.12.004
中图分类号：
学科分类号：
摘要：
There is a process signature problem related to clean machining surface integrity in metal cutting, which is extremely important to the service life and service performance of high efficiency and clean manufactured parts. Exploring the relationship between energy consumption changes and machined surface integrity during clean cutting of titanium alloy, will help optimize the cutting parameters to control the machined surface quality, and eventually improve the service life and performance efficient and clean manufacturing parts of titanium alloy. In this paper, a process signature method based on energy consumption was proposed to describe the interaction between multi-step clean machining process and machined surface integrity. The calculation model of specific cutting energy was established related to the process field parameters and cutting parameters. Combined with the two-step milling experiments of titanium alloy, the influence of the variation of rough machining parameters on the cutting force and specific cutting energy of rough machining and finish machining was analyzed, and the specific cutting energy of the machined surface of two-step machining was further studied, the variation laws of residual stress and crystallite size of rough machined and finish machined surfaces under different rough machining parameters were studied. The results showed that the changes in cutting force and cutting parameters could both affect the magnitude of specific cutting energy. In the multi-step machining process, the cutting speed in rough machining had the most significant impact on the cutting force, residual stress, and surface microcrystalline size of finish machining. The selection of cutting parameters for rough and finish machining in multi-step cutting processes could cause changes in surface integrity by changing the specific cutting energy. The radial cutting depth had the greatest influence on the specific cutting energy, followed by the feed rate and cutting speed. With the increase of feed rate and radial cutting depth, the specific cutting energy decreased. With the increase of cutting speed, the specific cutting energy first increased and then decreased. The microcrystalline size on the surface of precision machining was larger under higher cutting speed range, indicating that the larger rough machining cutting speed weakened the phenomenon of microcrystalline refinement on the surface of precision machining. As the radial cutting depth of rough machining and the feed rate per tooth increased, the surface microcrystalline refinement of precision machining showed a trend of weakening and then strengthening. When the specific cutting energy was large, the residual stress was large and the crystallite size was small. The establishment of a prediction relationship model for specific cutting energy consumption and machined surface quality is beneficial for process planning before actual machining process, and is of great significance for the reasonable selection of cutting parameters and the improvement of energy efficiency. On the premise of ensuring the machining quality, from the perspective of energy saving and consumption reduction, appropriate cutting speed, large cutting depth and feed rate should be selected, so as to reduce the specific cutting energy, reduce energy consumption and improve the machined surface integrity, which will help advancing the realization of clean and energy-saving manufacturing. © 2023 Chongqing Wujiu Periodicals Press. All rights reserved.
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页码：57 / 64
页数：7
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