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桂林電子科技大學畢業(yè)設計(論文)報告用紙
摘 要
數控銑床是重要的機械加工裝備，在制造業(yè)中占有重要的地位，對國民經濟的發(fā)展起著重要作用。其中，二維精密工作臺是數控銑床的關鍵部件，二維精密工作臺對數控銑床的加工精度和產品質量有著重要的影響，進行數控銑床二維精密工作臺設計具有重要的經濟價值與社會意義。
本設計的主要任務是研究數控銑床二維精密工作臺主要結構，主要包括工作臺的結構設計以及電機驅動電路的設計。
工作臺結構設計的原則是參考現有的數控銑床工作臺的結構，在實現工作臺的強度、剛度、尺寸等實用要求的同時盡量實現結構簡化及優(yōu)化。設計的步驟是首先確定總體尺寸，主要參考沈陽機床廠卓越型數控銑床的總體尺寸。并采用solidworks軟件進行計算機輔助設計，利用模型進行模擬裝配和干涉檢查。其次，在具體結構設計上盡量選著供應商的標準件，減少對機加工的要求。最后，對結構設計中主要部件例如絲杠進行校核以及精度驗算。
驅動電路設計部分，首先確定使用直流伺服電機，并根據電機的型號參數設計驅動電路。驅動電路采用MOS管組成的H橋進行功率驅動，采用PWM調速系統(tǒng)進行速度控制。
設計完成后，根據主要結構及尺寸關系，繪制二維的零件圖，繪制驅動電路原理圖。
關鍵詞： 數控銑床；工作臺；直流伺服電機；PWM
Abstract
CNC milling machining equipment, occupies an important position in the manufacturing sector plays an important role in the development of the national economy. The two-dimensional precision stage is a key component of CNC milling machine and the quality of two-dimensional precision stage has an important influence on CNC milling machining accuracy and product quality, CNC milling two-dimensional precision stage design has an important economic value social significance.
The design of the main task is to study the CNC milling two-dimensional precision stage the main structure, including the structure of the table design and the design of the motor drive circuit.
The table structure design principles with reference to the existing structure of the CNC milling machine table, the practical requirements of the bench-strength, stiffness, size, etc. At the same time try to simplify the structure and optimization. The design procedure is to first determine the overall size, the overall size of the Shenyang Machine Tool Factory excellence in CNC milling machine. Use Solidworks software for computer-aided design, using the model to simulate the assembly and interference checking. Secondly, the specific structural design as much as possible suppliers of standard parts, reduce machining requirements. Finally, the structural design of the main components such as screw checking and accuracy checking.
The design portion of the drive circuit, first of all determined using a DC servo motor and drive circuit according to the motor model parameters. Drive circuit composed of MOS transistor H-bridge power driver and PWM speed control system for speed control.
When design is complete, according to the main structure and size relationships, draw two-dimensional parts diagram, draw driver circuit schematic.
Keywords: CNC milling machine; table; DC servo motor; the PWM