碳化鎢端銑刀研磨製程規劃與分析

The planning and analysis of grinding process for end-mill of cemented tungsten carbide

鍾林樹(Lin-Shu Chung)

國立虎尾科技大學/工程學院/動力機械工程研究所/碩士(2006年)

摘要

由於現代切削技術日新月異，對各種類型之高精度刀具要求也相對提高。刀具之刀刃研磨是刀具製作最重要的過程，也是決定刀具幾何形狀、精度及切削性能之關鍵。使用傳統工具磨床時，限於機能不足需配予研磨附件，來進行分段研磨加工，因而喪失了部分刀具精度、影響刀具的切削性能，導致缺乏一致性和共通性之研磨依據，使得研磨作業無法標準化。

本文是將鼎維公司所生產的CNC五軸工具磨床，配合切削刀具研磨電腦輔助CAM系統，建構出完整端銑刀研磨程序與分析。刀具研磨製程規劃與分析，基本上包括了：刀具研磨加工方式、各軸向進退刀量及順序、刀刃離隙面之表面粗糙度、刀具幾何角度設定、以及研磨加工之研削參數設定等。

當進行刀具製作時，以研磨之刀具規格尺寸為依據，選用適當的砂輪規格與粒度，規劃砂輪組裝方式與所需研磨程序，配合切削刀具研磨電腦輔助CAM系統，設定適當的研磨參數，找出最佳進退刀量及順序，以節省加工時間，並藉由刀具3D模擬，達到安全的加工運動，研磨出所需之刀具。

並列摘要

Because the cutting method promotes much today, the high precision tool was extremely demanded in the cutting field. The tool shape, accuracy, and cutting performance depend much on the tool grinding process. Due to the limited properties of traditional tool grinding machine, some accessories must be assembled in the machine and operated it by steps. That made a low precision tool and poor tool cutting performance. Moreover, the non-consistent and the non-common in the grinding process made it impossible to construct a standard grinding process. By the constructed model and documents, a full cycle for grinding a precision tool could be got on the CNC tool grinding machine.

The main purpose of this paper was to grind a high precision tool by tool grinding CAM system and an analysis of grinding performance on a 5-axis CNC tool grinder machine made by Topwork. The basic grinding process planning and analysis for tool grinding included: grinding methods, tool geometry, sequence displacement of approach and retract in each axis, surface roughness of relief face, tool geometry angles of tool, and the grinding parameters.

In grinding a high precision tool, suitable wheels and wheel setting for grinding process should be chosen first which was based on the tool size. Then the CAM system of tool grinding will be applied for setting the appropriate parameters and find the optimal amount and sequence of approach and retract of wheel. Finally, simulated the 3D motion of tool and machine in the software, a safety cutting path could be gotten and a precision tool could be produced.

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