本文選題：數(shù)控加工 + 環(huán)形銑刀��； 參考：《哈爾濱理工大學》2015年碩士論文

【摘要】：目前我國數(shù)控加工中常用的刀具主要有環(huán)形銑刀、球頭銑刀、平頭端銑刀等,由于環(huán)形銑刀具有球頭銑刀和平頭端銑刀的雙重優(yōu)點,因此越來越多地被應用在汽車、航空航天等領域關鍵零件的加工中。常用的數(shù)控刀具主要是通過引進國外的機床進行磨制加工或者從國外購買,且價格昂貴,但是在磨制環(huán)形銑刀時,刀具的周刃前刀面以及圓弧刃前刀面在連接出有過渡棱,影響刀具的切削性能。為了改善此現(xiàn)狀,應需要對刀具的磨制進行更深入的研究,通過建立出砂輪磨削刀具各部分結構的磨削軌跡,保證環(huán)形銑刀周刃前刀面以及圓弧刃前刀面能夠光滑過渡,進而提高環(huán)形銑刀的切削性能。本文首先通過對刀具螺旋線的定義以及回轉面方程數(shù)學模型展開研究,建立了整體硬質合金環(huán)形銑刀刃線的幾何模型,得到了環(huán)形銑刀圓弧刃與周刃的等螺旋角刃口曲線方程,并對環(huán)形銑刀的結構以及刀具角度進行了分析。其次,依據(jù)環(huán)形銑刀的結構參數(shù)以及刃口曲線的幾何模型,運用坐標系轉換和微分幾何等理論知識,得到了環(huán)形銑刀在磨制時砂輪的中心及砂輪軸矢量的磨削軌跡�；贛atlab對得到的數(shù)學模型進行仿真,驗證所建立模型的準確性。最后,根據(jù)SAACKE五軸工具磨床砂輪運動的特點,將所得到的磨削軌跡的數(shù)學模型進行后處理,并基于Matlab得到數(shù)控五軸工具磨床的運動指令值,為環(huán)形銑刀的磨制做準備。運用SAACKE五軸工具磨床自帶的仿真軟件NUMROTO對得到的運動指令值進行驗證,檢驗磨床在運動過程中是否有超程以及過切現(xiàn)象,之后在SAACKE五軸工具磨床上進行磨制,最終確保了環(huán)形銑刀的周刃與圓弧刃的前刀面能夠光滑過渡。本文所使用的研究方法將為實現(xiàn)在現(xiàn)有的五軸數(shù)控磨床上磨制環(huán)形銑刀提供了理論基礎,同時也可為其它類似磨床進行刀具磨制或刀具設計的研究提供了參考。
[Abstract]:At present, the commonly used cutters in NC machining in our country are mainly ring milling cutters, ball end milling cutters, flat end milling cutters, etc. Because the ring milling cutters have the dual advantages of ball end milling cutters and flat end milling cutters, they are more and more used in automobiles. Aerospace and other areas of key parts processing. The commonly used NC cutting tools are mainly grinded by imported machine tools or purchased from abroad, and they are expensive. However, in the grinding of annular milling cutters, the circumferential cutting face of the cutter and the front face of the circular blade are connected with the transitional edges. The cutting performance of cutting tools is affected. In order to improve the present situation, it is necessary to further study the grinding of the cutting tool. By establishing the grinding track of the parts of the grinding tool, the circumferential cutting surface of the annular milling cutter and the front face of the circular cutting edge can be smoothly transitioned. Furthermore, the cutting performance of annular milling cutter is improved. In this paper, the definition of the helix of the cutter and the mathematical model of the rotary surface equation are studied at first, and the geometric model of the edge line of the annular carbide milling cutter is established, and the curve equation of the circular angle cutting edge of the annular milling cutter is obtained, and the curve equation of the circular angle cutting edge of the annular milling cutter is obtained. The structure and angle of annular milling cutter are analyzed. Secondly, according to the structural parameters of the annular milling cutter and the geometric model of the cutting edge curve, the grinding path of the grinding wheel center and the grinding wheel axis vector are obtained by using the knowledge of coordinate system transformation and differential geometry. The mathematical model is simulated based on Matlab to verify the accuracy of the established model. Finally, according to the characteristics of the grinding wheel motion of the saackle five-axis tool grinder, the mathematical model of the grinding track is post-processed, and the motion instruction value of the CNC five-axis tool grinder is obtained based on Matlab, which makes preparation for the grinding of the ring milling cutter. The simulation software NUMROTO of saackle five-axis tool grinder is used to verify the obtained motion instruction value, to check whether the grinding machine has overrun and overcut phenomenon in the process of motion, and then to grind it on the saackle five-axis tool grinder. Finally, the smooth transition between the circumferential edge and the circumferential edge of the annular milling cutter is ensured. The research method used in this paper will provide a theoretical basis for the realization of grinding ring milling cutters on existing five-axis CNC grinders, and also provide a reference for other similar grinding machines for the research of tool grinding or tool design.
【學位授予單位】：哈爾濱理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TG714;TG580.6

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