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课程名称：GDT第六部分 形状、公差、方向与圆跳动公差 概述：GDTP代表几何尺寸与公差专业认证，这是由美国机械工程师协会（ASME）提供的认证项目，旨在验证个人在理解和应用几何尺寸与公差（GD&T）原则方面的能力。GD&T是制造过程中用于清晰沟通的基本语言，确保设计按预期制造。ASME的Y14.5标准是GD&T的权威指南，而GDTP认证基于该标准的1994或2009年修订版，包括其附录以及原则和实践的应用。认证项目分为两个级别：技术员和高级技术员。本部分基于ASME标准，涵盖了形状、公差、方向和圆跳动公差的相关主题，包括：(a) 形状公差 (1) 直线度 (2) 平面度 (3) 圆度 (4) 圆柱度 (b) 方向公差 (1) 角度 (2) 平行度 (3) 垂直度 (c) 轮廓公差 (1) 线轮廓 (2) 表面轮廓 (d) 圆跳动 (1) 圆形 (2) 总体定位公差的指定方式、切平面、替代做法、修饰符的类型 (1) RFS (2) MMC (3) LMC (b) 应用 (1) 对公差特征 (2) 对基准 (3) 在适用时 (-a) 对几何公差 (-b) 对基准在MMC下的零公差。 该课程提供了对GD&T原则的深入理解，旨在增强学员在制造领域的专业能力。
GDTP stands for Geometric Dimensioning and Tolerancing Professional. It is a certification program offered by the American Society of Mechanical Engineers (ASME) that verifies an individual's competence in understanding and applying the principles of Geometric Dimensioning and Tolerancing (GD & T). GD & T is an essential language used for clear communication in manufacturing, ensuring that designs are manufactured as intended. ASME's Y14.5 Standard serves as the authoritative guideline for GD & T, and GDTP certification is based on either the 1994 or 2009 revisions of this standard, including its appendices and the application of its principles and practices. The certification program offers two levels of certification: Technologist and Senior. This section is based on ASME STD. In this section, topics covered Form, Profile, Orientation & Runout Tolerances including(a) form tolerance(1) straightness(2) flatness(3) circularity(4) cylindricity(b) orientation(1) angularity(2) parallelism(3) perpendicularity(c) profile(1) profile of a line(2) profile of a surface(d) runout(1) circular(2) totalspecifying orientation tolerancestangent planealternative practicetypes of modifiers(1) RFS(2) MMC(3) LMC(b) application(1) to the toleranced feature(2) to datums(3) when applicable(-a) to geometric tolerances(-b) to datumszero tolerance at MMC
