Đề thi cuối kỳ học kỳ 1 năm học 2017-2018 môn Cơ sở công nghệ chế tạo máy

The field of manufacturing technology, particularly metal cutting processes, is fundamental to modern engineering, enabling the precise creation of components across various industries. Understanding the principles governing these processes, from tool geometry to machine kinematics, is crucial for optimizing production efficiency and product quality. This document, derived from a final examination in Fundamentals of Manufacturing Technology, underscores the essential knowledge required for students in mechanical engineering. It delves into core concepts such as analyzing tool angles in grooving operations, determining cutting movements and cutting parameters in drilling, evaluating machining errors and their sources, and applying locating principles and datum definition for accurate workpiece positioning. Mastering these topics is indispensable for practical application in mechanical machining and for ensuring the high precision demanded by contemporary manufacturing.

Students ngành Cơ khí chế tạo máy, kỹ sư sản xuất, và các nhà nghiên cứu trong lĩnh vực công nghệ gia công kim loại.

This academic document serves as a comprehensive assessment of foundational knowledge in Fundamentals of Manufacturing Technology, focusing specifically on metal cutting processes. It systematically covers critical aspects through a series of practical problem-solving exercises. The first section addresses tool geometry by requiring the determination of tool angles for grooving operations, emphasizing the impact of cutting edge design on the machining process. Subsequently, the document explores the kinematics of drilling, tasking students to illustrate and identify primary cutting movements and feed movements, and to calculate essential cutting parameters such as cutting speed and feed rate, crucial for optimizing process efficiency and material removal. A significant portion is dedicated to machining errors, analyzing the nature and causes of inaccuracies that arise during production, particularly when using tools with dimensional deviations. This highlights the importance of understanding geometric accuracy and distinguishes between types of errors like systematic errors. Furthermore, the document delves into the principles of workpiece fixturing and locating, essential for achieving precision in mechanical machining. Students are required to define the necessary degrees of freedom to constrain a workpiece, design locating schemes for machining holes in rectangular blocks, and accurately determine datum errors. This application of the 6-point locating principle is vital for ensuring repeatable and accurate manufacturing. The overall approach combines theoretical understanding with practical application, enabling students to analyze, optimize, and troubleshoot real-world manufacturing processes. The insights provided are invaluable for future engineers involved in design, production, and quality control, ensuring they possess a robust understanding of how to achieve high-precision machining.