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Which week covers the topic of 'CAD: Assemblies and Standard Mechanical Parts'?
Which week covers the topic of 'CAD: Assemblies and Standard Mechanical Parts'?
Sustainability in Engineering Design is covered in Week 9.
Sustainability in Engineering Design is covered in Week 9.
True
Which type of manufacturing processes is focused on in Week 11?
Which type of manufacturing processes is focused on in Week 11?
Additive Manufacturing
The topic 'Materials and their ______' is covered in Week 10.
The topic 'Materials and their ______' is covered in Week 10.
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Match the weeks with their corresponding topics.
Match the weeks with their corresponding topics.
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What materials are NOT allowed during the quiz?
What materials are NOT allowed during the quiz?
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Students are required to bring their own writing paper to the quiz.
Students are required to bring their own writing paper to the quiz.
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What should a student do if they are ill and cannot attend the quiz?
What should a student do if they are ill and cannot attend the quiz?
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The need for _____ assemblies is important in product development.
The need for _____ assemblies is important in product development.
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Match the following learning objectives with their descriptions:
Match the following learning objectives with their descriptions:
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What analysis is used to check for potential conflicts during assembly in CAD?
What analysis is used to check for potential conflicts during assembly in CAD?
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CAD assemblies do not include a Bill of Materials.
CAD assemblies do not include a Bill of Materials.
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What type of simulation is mentioned in relation to CAD models?
What type of simulation is mentioned in relation to CAD models?
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The __________ is used to analyze the functionality and interconnections within a CAD assembly.
The __________ is used to analyze the functionality and interconnections within a CAD assembly.
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Match the following components of a CAD assembly with their functions:
Match the following components of a CAD assembly with their functions:
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What is the first step in bottom-up modeling?
What is the first step in bottom-up modeling?
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The main assembly is constructed before any subassemblies are created.
The main assembly is constructed before any subassemblies are created.
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How many parts are there in the Wheel Sub-Assembly of a car according to the example?
How many parts are there in the Wheel Sub-Assembly of a car according to the example?
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In the Wheel Sub-Assembly, the component that serves as the connection point is the ______.
In the Wheel Sub-Assembly, the component that serves as the connection point is the ______.
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Match the following components with their quantity in the main assembly example:
Match the following components with their quantity in the main assembly example:
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Which part is NOT included in the Sub-Assembly 1?
Which part is NOT included in the Sub-Assembly 1?
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All parts in the assembly structure must be modeled before creating any subassemblies.
All parts in the assembly structure must be modeled before creating any subassemblies.
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What are Tretlagerwelle used for in the assembly structure?
What are Tretlagerwelle used for in the assembly structure?
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What type of gear is used in the gearbox example from the ETH robot?
What type of gear is used in the gearbox example from the ETH robot?
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An exploded view of a gearbox illustrates its internal components clearly.
An exploded view of a gearbox illustrates its internal components clearly.
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What is the role of the screws turned into the plane of projection in the gearbox assembly?
What is the role of the screws turned into the plane of projection in the gearbox assembly?
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The __________ thread pairs with the internal thread in a screw connection.
The __________ thread pairs with the internal thread in a screw connection.
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Match the following components with their roles in a gearbox:
Match the following components with their roles in a gearbox:
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What is the minimum length (L_min) for an M4 diameter thread according to standard part selection?
What is the minimum length (L_min) for an M4 diameter thread according to standard part selection?
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DIN 4762 refers to hexagon socket head cap screws.
DIN 4762 refers to hexagon socket head cap screws.
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What is the purpose of using threaded parts in mechanical assemblies?
What is the purpose of using threaded parts in mechanical assemblies?
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How many types of mechanical parts are mentioned in the content?
How many types of mechanical parts are mentioned in the content?
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The radial shaft lip seal is an example of a mechanical part used in assemblies.
The radial shaft lip seal is an example of a mechanical part used in assemblies.
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What is the ISO standard for the washer mentioned?
What is the ISO standard for the washer mentioned?
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A ______ is used to hold components together and prevent axial movement in assemblies.
A ______ is used to hold components together and prevent axial movement in assemblies.
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Match the standard components with their respective identifiers:
Match the standard components with their respective identifiers:
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Which of the following is NOT a type of mechanical part mentioned in the content?
Which of the following is NOT a type of mechanical part mentioned in the content?
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What is the purpose of creating assembly models in CAD?
What is the purpose of creating assembly models in CAD?
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What type of seal is specified as DIN 3760-AS 15x24x7?
What type of seal is specified as DIN 3760-AS 15x24x7?
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Study Notes
Engineering Design and Material Selection
- Lecture 7 covers CAD assemblies and standard mechanical parts.
- The course schedule details topics, case studies, quizzes, and lecturers for each week. Week 7 specifically focuses on CAD assemblies and standard mechanical parts.
- Quiz 1 materials include a writing booklet, pencil, and student ID. Dictionaries (English-German, English-French, English-Italian) are provided. Students must log into computers in their exercise room. Students are to inform the instructor if they are unable to attend the quiz.
Learning Objectives
- Students need to understand the use of CAD assemblies in product development.
- Creating assembly structures in CAD is a key skill.
- Knowing standard parts in mechanical design is important.
- Reading and identifying standard parts in assembly drawings is necessary.
Why Assembly Drawings are Needed
- Diagrams illustrate the purpose of assembly drawings by examining component parts (images of components are displayed)
Assembly Example: Car
- Displayed is a 3D model of a small vehicle (red and gray) .
Part List (example)
- A technical drawing shows a small vehicle (car) with labeled parts. A table of components and quantity is presented
- The documents includes dimensions
- A technical drawing provides details of a machine part (vehicle chassis) and dimensions. The technical drawing also contains a part list.
CAD Assemblies Support...
- CAD assemblies provide visualization of assembly, functional checking, interference analysis, motion simulation, and manufacturing planning.
- CAD assemblies support the utilization of bill of materials, standard elements and part reuse.
Breathe: Motion Simulation
- A 3D model of a mechanism relating to motion simulation is shown.
CAD Model of the PLUS II
- A parts exploded view diagram of a vehicle is shown, displaying components like bodywork, doors, drivetrain, windshield, and electronics.
Assembly Structure
- A hierarchical diagram displays assembly structure starting with Main Assembly, sub-assemblies 1 & 2, and standard elements. It then displays parts 1-4.
Assembly Structure Example – Car
- A hierarchical diagram displays the structure of a car, including components like the body, chassis, wheels, and sub-assemblies. Specific component details are listed (e.g., front, back, chassis, wheels).
Bottom-Up Modeling
- The bottom-up method starts with individual parts, builds sub-assemblies, and then builds up to the main assembly
- Diagram demonstrates the Bottom Up assembly and sub-assembly approach.
CAD Assembly: Bottom-Up Modeling
- The diagram details a step by step process including creating assembly, sub-assemblies and reusing parts.
Assembly in CAD Feature
- CAD assemblies show features representing relationships between form features (e.g., against, align co-planar, offset, and co-axial).
Part Positioning/Kinematic Simulation
- The technique or mechanism is displayed within the illustration of a design.
- A graphic appears displaying design software along with an image of a design component (universal joint.)
Assembly Constraints in NX
- Examples of constraints include Touch Align, Concentric, Distance, Fix, Angle etc.
- The method or mechanism and possible constraints for those types of design are shown.
Additional Constraint Fixes
- The z-coordinate is fixed with an additional constraint.
Assembly Array
- Assembly navigator displays a collection of components along with their features and instances.
CAD Assembly: General Creation
- The process of creating a CAD assembly is explained.
- A step by step process shows an example of creating a car assembly by creating main parts, subparts, adding parts using component tools ,and fixing components.
Assembly Constraints: Car
- Examples of Touch Align constraints in a car part assembly are shown.
Which Statement is True About Assembly Constraints?
- Multiple-choice question about assembly constraints for an axle in a diagram is shown.
Move Components/Collision
- Graphic shows software for moving components within a CAD assembly.
CAD Assembly: Assembly Structure & Constraints in NX
- Screenshot illustrates a model showing different types of constraints that can be made along the assembly model. Details about the elements and part creation are displayed.
Standard Parts (ISO)
- Simplifying the design process. Categorize parts as components and elements. Components are normally bought from external vendors. Examples include bearings, which are not strictly normed. Elements are common geometry shapes such as keys.
Standard Components - Examples
- Examples including nuts, bolts, circlips (retaining rings), springs, ball bearings, parallel keys, rotary shaft lip seals, gear, O-rings.
Gearbox Assembly
- Exploded view of a Gearbox assembly is shown.
Gearbox Example - Usage
- A specific type of gearbox is used in an ETH robot.
Gearbox Example - Exploded View
- Exploded view of a gearbox highlighting components. Different types of components and their dimensions are included.
Section Views in Assemblies
- Section views in parts are shown.
Part Families of Standard Parts
- Part families such as LEGO elements, DIN elements, reusable library, and types of keys (Parallel, Keys) are covered.
Gearbox Example
Bearing and Circlip
- Diagrams showing bearing and circlip components are displayed.
Seals
- Illustrations/diagrams of seals, such as O-ring, radial shaft lip seal, are displayed.
Key & Gearing
Key & Gearing
- Diagrams and textual examples are used to explain gearing, keys, and their use.
How Many Bearings Can Be Found in This Drawing?
- Question about finding bearings in a CAD drawing.
CAD Assemblies and Standard Mechanical Parts: Wrap-up
- Summary of the lesson, highlighting assembly models, features, and strategies for creating assembly models in CAD
Exercise 7: Working with CAD Assemblies
- Working with assemblies are explained for a design software (e.g., NX)
Studying That Suits You
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Description
This quiz focuses on CAD assemblies and standard mechanical parts as covered in Lecture 7 of the Engineering Design course. Students will demonstrate their understanding of creating assembly structures and identifying standard parts in assembly drawings. Ensure to bring your writing materials and student ID for the quiz.
