Deep Hole Boring hinge composite tool design
Abstract：Deep processing as a new process developed after World War II, plays a huge role in national economic development. However, due to the late start of the deep hole processing technology in China is not optimistic. In this paper, a deep hole machining principle. And processing materials for the design requirements and design tool suitable for processing small and medium diameter deep hole. This paper focuses on analysis of the process characteristics of the process of deep hole machining, deep hole machining process. The preliminary analysis of the deep hole machining process characteristics. This article describes the current status of deep-hole cutting tool at home and abroad, combined with the structural design of composite tool, boring and reaming for Solidwork and AutoCAD boring, reaming three-dimensional modeling of composite tool according to design requirements.
我加工了一批箱體（WS120型蝸桿減速器）的內(nèi)孔， 該孔的精度要求較高， ， Ra =1.6μm，由于此孔的孔徑和精度要求校高，通常用的加工手段有兩種方法：方法一，先用鉆頭鉆出孔（粗加工）后，留出精加工余量，再由技術(shù)水平較高的工人師傅直接鏜出內(nèi)孔達到精度要求；方法二，先對工件鉆孔→擴孔→粗鉸（留0.1～0.2mm的鉸削余量）→精鉸，來保證孔的質(zhì)量。兩種方法的優(yōu)劣勢各有不同，方法一中，其操作過程簡單，加工出的孔，其直線度較好，刀具消耗低，但是對鏜孔工序的工人技能要求較高（在普通機床上加工并非數(shù)控機床設(shè)備上加工時），而且較容易產(chǎn)生廢品，工作效率也低；而方法二加工出來的孔徑取決于鉸刀的精度、尺寸相對穩(wěn)定，對操作工人的技能水平要求也相對不很高，但是加工出來的孔其表面粗糙度低，孔的直線度較差，鉸刀的消耗也很大，效率非常低，只適宜單件生產(chǎn)，不適合批量生產(chǎn)，若能綜合兩種加工方法的優(yōu)點，既保證零件的加工精度，工人技能要求也不需很高，且又能降低生產(chǎn)成本,提高效率的加工方法（措施）。那么就這批產(chǎn)品的生產(chǎn)特點（批量）和當時工廠的生產(chǎn)條件（設(shè)備非常欠缺，只有一臺Z525型鉆床）及采取常規(guī)的加工方法，進行生產(chǎn)的難度較大且效率較低的問題就可得到很好的改善。因此，通過查找資料、借鑒工藝、設(shè)計出一款將鉆孔、鏜孔、鉸孔容為一體的專用復合刀具。如圖1所示：
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