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Lecture

Assembly: Process Integration

In course

MICRO-631: Selected topics in advanced manufacturing

The course aims to provide a comprehensive overview of ongoing advanced manufacturing research topics and an opportunity for students to investigate current research trends. ...

Description

This lecture by the instructor covers the importance of assembly in combining different materials, addressing tolerances, labor costs, and precision engineering. It delves into typical process tolerances, bonding issues, bimorph effects, and the design principles of Design for Assembly (DFA) and Design for Manufacturing (DFM). The lecture emphasizes the need for a system design approach in assembly, explores the concepts of stability, positioning errors, and mobility analysis, and discusses the optimization of parts for simpler assembly. It also introduces the Boothroyd-Dewhurst method for reducing assembly complexity and manufacturing costs through part count reduction.

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Related concepts (11)

Design for manufacturability

Design for manufacturability (also sometimes known as design for manufacturing or DFM) is the general engineering practice of designing products in such a way that they are easy to manufacture. The concept exists in almost all engineering disciplines, but the implementation differs widely depending on the manufacturing technology. DFM describes the process of designing or engineering a product in order to facilitate the manufacturing process in order to reduce its manufacturing costs.

Positioning system

A positioning system is a system for determining the position of an object in space. One of the most well-known and commonly used positioning systems is the Global Positioning System (GPS). Positioning system technologies exist ranging from worldwide coverage with meter accuracy to workspace coverage with sub-millimeter accuracy. Interplanetary-radio communication systems not only communicate with spacecraft, but they are also used to determine their position.

Indoor positioning system

An indoor positioning system (IPS) is a network of devices used to locate people or objects where GPS and other satellite technologies lack precision or fail entirely, such as inside multistory buildings, airports, alleys, parking garages, and underground locations. A large variety of techniques and devices are used to provide indoor positioning ranging from reconfigured devices already deployed such as smartphones, WiFi and Bluetooth antennas, digital cameras, and clocks; to purpose built installations with relays and beacons strategically placed throughout a defined space.

Global Positioning System

The Global Positioning System (GPS), originally Navstar GPS, is a satellite-based radio navigation system owned by the United States government and operated by the United States Space Force. It is one of the global navigation satellite systems (GNSS) that provides geolocation and time information to a GPS receiver anywhere on or near the Earth where there is an unobstructed line of sight to four or more GPS satellites.

Error analysis for the Global Positioning System

The error analysis for the Global Positioning System is important for understanding how GPS works, and for knowing what magnitude of error should be expected. The GPS makes corrections for receiver clock errors and other effects but there are still residual errors which are not corrected. GPS receiver position is computed based on data received from the satellites. Errors depend on geometric dilution of precision and the sources listed in the table below. User equivalent range errors (UERE) are shown in the table.

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