Tái tạo hàm biên dạng cam phẳng và chuyển vị của cần sử dụng đường cong B-Spline dựa trên phương pháp phân rã ngược và lý thuyết về quan hệ tiếp xúc - Ứng dụng vào cơ cấu cam cần lắc đáy lăn
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Tác giả hoặc Nhóm tác giả: Le Cung - Nguyen Tan Khoi
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Nơi đăng: Asian International Journal of Science and Technology in Production and Manufacturing Engineering AIJSTPMEcvs weekly sale cvs print prescription savings cards |
| Lĩnh vực: Kỹ thuật; Loại: Bài báo khoa học; Thể loại: Quốc tế |
| TÓM TẮT |
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| ABSTRACT |
| For controlling the precision of a manufacturing planar cam mechanism, one can base on a set of digital points measured on the manufactured cam profile by a coordinate measuring machine (CMM). Issued from this set of discrete digital points and by applying the well-known B-Spline least squares approach, one can reproduce the cam profile function. The given cam profile function and the theory of contact relations between cam and its follower enable us to deduce the displacement law of the follower and its derivatives. This paper presents a new method for reconstruction of a planar cam profile function from a set of digital points measuring on CMM machines, using B-Spline curve based on inverse subdivision method and theory of contact relations. An application to cam mechanism of oscillating follower with roller will be presented. To verify the feasibility and the accuracy of the proposed inverse subdivision method, a comparison between B-Spline least squares approach and inverse subdivision has been realized. The method possesses an acceptable accuracy and spends less time of calculation. |
