Geometric Distortion of Uncut Chip in One Plane Milling

Main Article Content

Thitaphol Huyanan


For over last 5 decades, various models for predicting the uncut chip geometry have been introduced. The conventional model is, surprisingly, still well accepted and applied in many sections despite of being derived from the circular tool trajectory instead of the trochoid one. As a result, this paper presents an analysis of geometric distortion between the actual uncut chip and the conventional model through both the in-cutting angles and the new approached dimensionless parameters. In this works, the VBA for AutoCAD programming was implemented as the main tool for creating uncut chips and determining their characteristics. The trochoid trajectory was generated from a series of successive points on the synthetic curves. According to the comparative study’s results, the proposed criteria for assessing the geometric distortion can identify the differentia between the actual uncut chip and the conventional model as expected. It is then possible to draw a conclusion that the use of conventional model is valid regardless of any effects due to its oversimplification if, and only if, the cutting condition is on a good term with and do not exceed and

Article Details

Research Articles


Martellortti M.E., An Analysis of the milling process, Trans. ASME 63, 677–700, 1941.

Martellotti M.E., An analysis of the milling process. Part II. Down milling, Trans. ASME 67, 233–251, 1945.

Spiewak S.A., Analytical modeling of cutting point trajectories in milling, ASME J. Eng. Indus. 116, 440–448, 1994 .

Spiewak S.A., An improved model of the chip thickness in milling, Ann. CIRP 44 (1), 39–42, 1995 .

Li H.Z., Liu K., Li X.P., A New method for determining the undeformed chip thickness in milling, J. Mater. Process. Technol. 113, 378–384, 2001.

Huyanan T., Development of a Hybrid End Milling Analysis System, Ph.D Thesis, University of Sheffield, UK, 2003.

Kumanchik L.M., Schmitz T.L., Improved analytical chip thickness model for milling, Precis. Eng. 31, 317-324, 2007.

ฐิตะพล หุยะนันท์, กฤษฎา ไสสุวรรณ, การศึกษาลักษณะจำเพาะของเศษก่อนขาดระหว่างการเซาะร่องด้วยดอกกัดฟันตรงผ่านการจำลองเส้นทางการตัดด้วย VBA สำหรับ AutoCAD, การประชุมวิชาการเครือข่ายวิศวกรรมเครื่องกลแห่งประเทศไทย ครั้งที่ 25, จังหวัดกระบี่ 19 - 21 ตุลาคม 2554