第七章 Detail Drawing：A detail drawing is a drawing that indicates the construction, size and technical requirements of a single part. It describes the shape, gives the dimensions, and provides all the information needed to make the part. It includes not only criteria for its machining, manufacturing and inspection, but also important technical information for its design and production. This chapter introduces the method to construct detail drawings, including representation, dimensioning, and technical requirements.7.1Technical Requirement-rougness:In this part we talk about one of technical requirement-roughness, we learn the detail drawing contents and technical requirements.[单选题]What is the most commonly used evaluation parameter of surface roughness选项:[Ra, Ry, Yn, Rz]
7.2Limits and Fits:In this part we learn the limits and fits. first we should know the part interchangeability. Parts interchangeability called the compatibility of parts. Limit and fits standards have been defined. Such standards ensure the compatibility and precision of part.
7.3Fitting:Fitting is the relationship between the matched hole and shaft with the same basic size. and we will introduce the general concept of fitting and its types, reference system of fits , principles of selecting a reference system and principles of selectiong a reference system,
7.4Marking Limits and Fits:In this part we talk about marking limits and fits and how to marking the limits and fits in detail drawing.
7.5Choosing Views:In this part we learn how to choosing views for detail drawing and principle of selection views.
7.6Dimensioning of a Part:In this part we learn the dimensioning of a part, includes five questions : datum features, direct specifications of important dimensions, avoiding close dimension chains, producing dimensions in accordance with machining sequence and exercises.
7.7Representation Methods and Dimensioning of Typical Parts:In this part we talk about representation methods and dimensioning of typical parts.
7.8Detail Drawings Interpretation:In this part we talk about detail drawings interpretation, includes purposes and requirements , methods and steps to read the drawing of a part then some examples.
[单选题]What is the unit in Ra6.3?选项:[uncertain, mm, m, um]
[单选题]In hole based system of fit, what is the basic devitaion symmbol of the hole选项:[H/h, h, H, any letter]
[判断题]The upper deviation is : maximum size-basic size and the lower deviation is : minimum size-basic size选项:[对, 错]
[单选题]What principle does one should follow in set position of a part?选项:[machining position, working position, uncertain, machining position and working position]
[单选题]What is the fit of H7/f6?选项:[transition fit, clearance fit, uncertain, interferance fit]
[单选题]How much is the upper deviation of h6选项:[2, 1, 3, 0]
[判断题]we can find the material from title block选项:[错, 对]
[判断题]The dimension chain should be closed选项:[错, 对]
[判断题]When represent a shaft, the non-circular view should be chosen as main view选项:[错, 对]
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