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摘 要
本次畢業(yè)設計是以CA6140車床上開合螺母的工藝工裝為基礎的，內容主要包括以下幾個方面：設計零件，加工工藝及工時計算，設計兩套夾具，拆畫一套夾具等。
為了提高勞動生產率，保證加工質量，降低勞動強度，需要設計專用夾具。
夾具方案的確定在國內是一項十分重要的設計程序，其方案的優(yōu)劣決定了夾具設計的成功與失敗。確定設計方案時應遵循以下原則：確保加工質量，結構盡量簡單，操作省力高效，制造成本低廉。
這次畢業(yè)設計是我們即將畢業(yè)之前的最后一次在校設計，設計內容比較全面，所涉及的知識比較廣，是對我們所學知識及應用、設計能力的一次綜合檢驗。
通過這次畢業(yè)設計，既充分鍛煉了我們的設計能力，又補充了在校學習期間知識和能力的不足。
關鍵詞：CA6140開合螺母;夾具設計；工藝工裝設計.
Abstract
My graduated design is based on the craft design of the opened nut to CA6140, which includes parts design, machining and time calculations, a design of two set of jigs, a dismantalment-drawing of a set of jig.
To improve productivity, and ensure processing quality and reduce labor intensity, it needs to design special jig.
The esdeblishment of jig programmes is so important that it decide the quality of the jig. Making the design of programmes should follow the following principles : ensuring processing quality structure as simple as possible, allowing efficient operation, low cost manufacturing.
The graduated design , which includes lots of content and involves much knowledge, is the last one for me before we will graduate. It is a comprehensive test to our knowledge and applications.
By doing the graduated design , it not only can improve our full design capacity , but also add in the inadequate knowledge and capacity that we have learned in school.
Key world: opened nut to CA6140;tongs design;process design.
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