發(fā)布時間：2018-02-03 09:37

  本文關(guān)鍵詞： 結(jié)構(gòu)改進 高速高效 數(shù)控車刀　出處：《湖北工業(yè)大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：金屬切削刀具行業(yè)在數(shù)控機床已成為裝備制造主流的今天,肩負著為制造業(yè)提供關(guān)鍵裝備數(shù)控刀具的重任。雖然在產(chǎn)品成本中刀具所占份額較小,但制造業(yè)的加工技術(shù)水平受刀具行業(yè)整體水平的影響較大,同時,裝備制造業(yè)的發(fā)展也會促進刀具行業(yè)的發(fā)展。根據(jù)制造業(yè)發(fā)展的需要,多功能復(fù)合刀具、高速高效切削加工刀具將成為刀具發(fā)展的主流方向。面對日益增多的難加工材料,刀具行業(yè)必須改進刀具材料、研發(fā)新的刀具材料和設(shè)計更合理的刀具結(jié)構(gòu)。為了更好地適應(yīng)數(shù)控切削加工的需求,不斷提高加工效率,降低生產(chǎn)成本,本課題研究基于數(shù)控車削加工生產(chǎn)實際,結(jié)合目前對刀具開發(fā)的新需求,對數(shù)控車刀結(jié)構(gòu)改進與優(yōu)化設(shè)計進行了深入研究。首先,綜述了課題研究國內(nèi)外現(xiàn)狀,主要分析了機床工具行業(yè)發(fā)展現(xiàn)狀、全球及我國金屬切削刀具行業(yè)現(xiàn)狀、數(shù)控加工刀具國內(nèi)外研究現(xiàn)狀等。其次,對金屬切削刀具基礎(chǔ)知識進行了分析,闡述了刀具切削部分的構(gòu)成、刀具靜態(tài)角度、切削力來源與計算以及影響切削力的主要因素等。再次,對刀具磨損與刀具壽命進行了具體深入研究,分析了刀具磨損形態(tài)、形成原因,刀具壽命及其經(jīng)驗計算公式,影響刀具壽命的因素,著重剖析了數(shù)控車刀損壞形式及損壞的主要原因。然后,對切削熱和切削溫度進行了深入剖析,分析了切削熱的產(chǎn)生與計算公式,切削熱的傳導(dǎo)與影響散熱的因素,切削溫度的測量方法,以及影響切削溫度的主要因素等。最后,從切削效率角度出發(fā),對數(shù)控車刀進行了結(jié)構(gòu)優(yōu)化改進設(shè)計、參數(shù)優(yōu)選設(shè)計,并通過有效的切削加工試驗統(tǒng)計數(shù)據(jù)對比分析,進一步驗證了本次結(jié)構(gòu)優(yōu)化設(shè)計的可行性與實用性。內(nèi)、外圓復(fù)合車削數(shù)控車刀結(jié)構(gòu)改進設(shè)計符合數(shù)控車削加工技術(shù)集成化、智能化、多功能發(fā)展的新需求,采用將內(nèi)孔車削與外圓車削加工用刀片二者共同安裝于同一刀體的復(fù)合功能結(jié)構(gòu)設(shè)計,經(jīng)多次切削加工試驗驗證,該刀具的應(yīng)用能有效地節(jié)省切削加工過程的輔助時間,提高加工效率,降低生產(chǎn)成本,為企業(yè)帶來更好的經(jīng)濟效益。
[Abstract]:Metal cutting tool industry has become the mainstream of equipment manufacturing in the CNC machine tool industry today, which shoulders the responsibility of providing the key equipment for the manufacturing industry, although in the cost of products, the cutting tools account for a small share. However, the manufacturing technology level is greatly affected by the overall level of the cutting tool industry. At the same time, the development of the equipment manufacturing industry will also promote the development of the tool industry. High-speed and high-efficiency cutting tools will become the mainstream direction of tool development. Facing the increasing number of difficult machining materials, the tool industry must improve the tool materials. Research and development of new tool materials and design of more reasonable tool structure. In order to better meet the needs of NC machining, continuously improve the processing efficiency and reduce production costs. Based on the production practice of NC turning and the new requirement of tool development at present, the structure improvement and optimization design of NC turning tool are deeply studied in this paper. Firstly, the status quo of the research at home and abroad is summarized. This paper mainly analyzes the current situation of the development of machine tool industry, the status of metal cutting tool industry in the world and our country, and the research status of NC cutting tool at home and abroad. Secondly, the basic knowledge of metal cutting tool is analyzed. The composition of cutting tool, the static angle of cutting tool, the source and calculation of cutting force and the main factors affecting cutting force are expounded. Thirdly, the tool wear and tool life are studied in detail. This paper analyzes the tool wear form, forming reason, tool life and its experience calculation formula, factors affecting tool life, and emphatically analyzes the damage form of NC turning tool and the main reason of damage. In this paper, cutting heat and cutting temperature are deeply analyzed, and the generating and calculating formulas of cutting heat, the conduction of cutting heat and factors influencing heat dissipation, and the measuring method of cutting temperature are analyzed. Finally, from the point of view of cutting efficiency, the structure optimization design and parameter optimization design of NC turning tool are carried out. The feasibility and practicability of the structural optimization design are further verified by comparing and analyzing the effective statistical data of cutting experiments. The improved design of NC turning tool structure meets the new requirements of integrated, intelligent and multifunctional development of NC turning technology. The design of the compound function structure of the inner hole turning and the outer circle turning blade is adopted, which is installed in the same cutting body together, and has been verified by many cutting experiments. The application of this tool can effectively save the auxiliary time of cutting process, improve machining efficiency, reduce production cost, and bring better economic benefits for enterprises.
【學(xué)位授予單位】：湖北工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TG71

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