Mechanical Assembly - Paper 2 Flashcards
Which methods are frequently used to overcome information overload in assembly drawings?
Tracing and sketching the components into their assembled positions.
What is tracing?
With a thin sheet of paper, trace the components into their correct assembled position.
What features should be added to a tracing?
Hatching and centrelines.
What are the first 2 steps of the procedure you should follow when planning an assembly drawing?
- Read the instructions and check which views have to be drawn.
- Study each individual component and determine how it fits into the assembly.
What are step 3 and 4 of the procedure you should follow when planning an assembly drawing?
- Study any additional information explaining how the components fit together.
- Make a freehand sketch or tracing of the components in their assembled position.
What are step 5 and 6 of the procedure you should follow when planning an assembly drawing?
- Plan how all the required views fit onto a drawing sheet.
- Select a component to draw first and place it in its correct position.
What is stage one of the drawing process?
- Carefully plan and position the layout of the required views by drawing, in light construction lines, the outline of the assembled parts as boxes onto the drawing sheet.
What is stage two of the drawing process?
- Select a component to draw first. Mark out the main features of the component on each view, like outlines, centre lines and other prominent features.
What is stage three of the drawing process?
- Build up the drawing neatly and accurately by adding more components and detail to each view until the drawing is complete.
What is stage four of the drawing process?
- Decide where to position features, like the auxiliary views of fasteners, in order to save space and time. Darken the outlines and add all the finer detail.
What is stage five of the drawing process?
- Complete the drawing by filling in the hatching detail. Remember which components must not be sectioned.
What is stage six of the drawing process?
- Include all extra features on the completed drawing, like labels, a title block, titles, scale and dimensions if required.
What is a detail drawing?
A detail drawing is a drawing of a single component or part of a sub-assembly that is usually drawn to a larger scale and is used for manufacturing purposes.
What information should be included on a detail drawing?
Dimensions, labels, codes, standards, materials, treatment requirements, surface texture and tolerances.
