Papers by Keyword: Cutter Path

Abstract: The main problem associate with the machining of thin-wall component is the wall deflection which resulting in dimensional surface error that leads to part rejection. The magnitude of wall deflection is induced by the cutting force generated during the material removal process which is governed mainly from the selection of cutter path strategies. Therefore, it is necessary to judge the machining performance of a different cutter path prior to actual machining. In this paper, the machining accuracy of three cutter path strategies namely waterline-step, overlapping-step and tree wise-steps for machining thin-wall component were investigated. It was found that there is a variation in wall accuracy for different cutter path strategies. Based on the experimental results waterline cutter path produced the least surface error followed by overlapping and tree-wise steps.

Abstract: Many parts such as craftworks and hand draw pictures were manufactured based on the image. Their shape was irregular and couldn't measure accurately. And the dimension was not labeled definitely. So the CNC machining code couldn't directly generate. The paper studied the methods and the machining performance of this kind of part. The digital image could be obtained through the scanner or the digital camera, and pretreated by computer. The digital images were transferred into the vector document and the boundary dimension parameters could be gotten. The NC instruction was generated through the automatic module. Finally the procedure of programming and process was verified by an image

Abstract: During the high-speed machining, cutter path of numerical control needs to satisfy the following requirements. There has no colliding among work pieces, fixtures and so on. The cutter path variation cannot too dramatically and the vibration should in the controlled area during the process. Feed speed can modify with path curvature variation and cutting depth need to be equality. This article will analyze and research in the mode of cutter advanced and retreats, cutter movement mode, cutter feed mode and cutter path of corner treatment during the high-speed process programming that could effective optimize cutter path, process efficiency and quality.

Abstract: This paper presents a simulation approach for estimating the trajectory error of a linear interpolation cutter path produced by the numerical control Acc/Dec motion characteristics for a MC. The algorithm is very simple and efficient for simulation calculation. Through comparing the machined profiles of workpiece with the calculated cutter path trajectories, the effectiveness of the proposed approach is sufficiently demonstrated.

Abstract: Complex parts are the main object for CNC machining. The 3-TPS hybrid machine tool can achieve 3-axis, 4-axis, 5-axis, vertical and horizontal machining. The analysis of nonlinear error of the 3-TPS hybrid machine tool on 5-axis machining and the reduction the error by self-adaptation linearization are introduced in the paper. The obtained formula for nonlinear error can be used in different situations and estimate three-dimensional cutter evelope forming error.

Abstract: This paper proposes an optimal interpolation approach to generate cutter paths in the form of polar coordinate for machining noncircular contours. The cutter path obtained with the approach consists of a series of Archimedes’ spiral segments and the number of segments is the fewest under the condition that the interpolation error completely satisfies the specified limit value. It can be also evidenced that the profile error of the machined contour due to the cutter path is perfectly controlled within the specified interpolation accuracy limit. The result of applying the approach to the contour machining of a disc cam sufficiently illustrates the effectiveness of the proposed approach.