Experimental Research And Cutting Property Analysis On Turn-Chasing Combined Machining

With the progress and development of the auto industry, the machining tools supporting auto parts are applied more extensively. The crankshaft of the engine as the core component in the automobile manufacturing, its processing technology with continuous technological innovation has become increasingly efficient and mature. Turn-chasing is a high efficient cutting technology of combined machining which has been recently used for manufacturing the crankshaft journal of automobile engine. In the process of turn-chasing, the chasing teeth is successively cutting workpieces with the reciprocating motion from radial to axial direction, to bring some different changes involved in cutting due to a plurality of cutting edges, making the cutting heat and the cutting force different from the single-edged cutting.The axial cutting process of this combined machining is paid more attention to in the article. The cutting performance and cutting efficiency are researched through the establishment of a turn-chasing cutting forces and temperature test platform, to carry out a pilot study of this machining method. Cutting experiments are settled to explore the relationship between tool teeth and cutting performances as well as cutting efficiency. Establishing a single-tooth turn-chasing cutting model including cutting temperature and cutting force with mathematic methods, these experiments and theoretical analysis would have an important significance of the research, the main contents of the study are as follows:Firstly, a brief introduction of turn-chasing cutting process concepts is written, and its processing characteristics, as well as the crankshaft machining methods development and technology applications nowadays are analyzed and summarized. Then, single-tooth turn-chasing cutting models are established by the method of multiple linear regression using orthogonal cutting tests data. Two kinds of cutting tests are designed with the same parameters and the same material removal rate separately. Through the analysis of the test data, the research is accomplished on the cutting performance, cutting efficiency and surface quality of the workpiece. Comparative analysis of the errors between the experimental value and the theoretical value are calculated by experimental data and cutting models, and the establishment of the multi-teeth turn-chasing model is proposed in the future. Theoretical support for the actual machining using turn-chasing method is provided in turn-chasing tool structure and cutting parameter selection. To research deeply on this machining technology may be applied on manufacturing some kinds of high performance materials.