工廠生產(chǎn)及質(zhì)量培訓——形位公差理念-在線瀏覽
2025-05-09 07:57本頁面
【正文】 efinition ? Circular Runout is a posite control affecting both the form and location of circular elements of a part feature. ? A Circular Runout zone can be thought of as two coaxial circles whose centers are located on the datum axis. 64 Circular Runout Application 65 Total Runout Definition ? Total Runout is a posite control affecting both the form and location of all surface elements simultaneously. ? A Total Runout zone consists of two coaxial cylinders whose centers are located on the datum axis. 66 Total Runout Application 67 Profile can be used as a form control or a related feature tolerance.. 68 Profile of a line Definition A profile of a line tolerance zone is two parallel straight or curved lines,offset from the true profile by the specified amount. The zone is two dimensional. 69 Profile of a line Application 70 Profile of a surface Definition A profile of a surface tolerance zone is two parallel boundaries, offset from the true profile by a specified amount. The zone is three dimensional. 71 Profile of a surface Application 72 End 。T? The Geometric Tolerance is the amount which true elements are permitted to vary from an ideal element. ? 指被測實際要素對其理想要素的變動量 . 7 Introduction(3) 公差的分類 Classification of Tolerance (1). 尺寸公差 Dimension Tolerance (2). 表面形貌公差 (表面粗糙度 ) Surface Tolerance (Roughness) (3). 形狀和位置公差 Geometric Tolerance 8 Introduction(4) In 1966, the first united standard was published by the American National Standards Institute (ANSI), known as ANSI . It was updated in 1973,1982,1994. 形位公差標準的演變歷程 : 最先應用于軍事工業(yè) , 以美國與英國應用最為廣泛 ,各種不同的組織相繼出版了各種不同的標準 .1966年 ,第一部統(tǒng)一的標準 ANSI ,並經(jīng)歷 1973,1982和 1994三次改版 . 9 Introduction(5) 優(yōu)點 : Advantages: ? 有利于增強彼此之間的交流 Improves munications ? 有利于產(chǎn)品的設計 Better product designs ? 有利于零件制造公差的盈餘 Production tolerances increased 10 專門術(shù)語 Terminology 11 amp。T是一個具有雙重作用的系統(tǒng) .首先 ,它是一組用來定義被測要素形位要求及其公差帶形狀的國際通用符號 。T is a dual purpose system. First it is set of standard symbols which are used to define part features and their tolerance zones. Second it is a philosophy of defining a part based on how it functions. Introduction(2) What is GDamp。 原則 Clas
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