Manufacturing Methods - Creating Shapes
By DarthVader
Date: 2022-06-20
Topic: 132 see comments
Post views: 992
Manufacturing Methods - Creating Shapes
The basic process routes for manipulating a material into a specified shape nearly all fit into one of four categories:
- Pouring, referred to more precisely as casting
- Squeezing, rolling and bending, called forming
- Cutting, sometimes referred to as machining
- Joining
The way in which a material is shaped into a product can greatly influence its microstructure.
The properties of a solid material can be profoundly influenced by its microstructure.
Thus the properties of materials in products are dependent on how they are processed.
The microstructure is between the atomic scale and the macrostructure, and unlike the atomic bonds, the microstructure can be influenced and its properties altered.
Classifying Shapes
2D (continuous)
If the profile does not change along its length - like a pipe, electrical cable or railway track - then it can be classified as having a simple (continuous) shape.
These objects are not actually 2 dimensional, but only 2 of the diensions are of significance to the manufacturing process, the length is arbitrary.
Many 2D products are used as the raw material for processes that make them into 3D shapes. PVC window frames for example are made from continuous extruded sections.
3D Shapes
Sheet - products made from a uniform layer of material such as a plastic bucket or chair.
Bulk - bulk shapes have complex forms often with little symmetry. If they have no significant cavities in them they are classed as solid, if they do have cavities they are classed as hollow. A ship propeller would be classed as a 3D-bulk-solid product.
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