There are various commercial systems available for part digitization. These systems range from coordinate measuring machine [CMM}, laser scanners to ultrasonic digitizers. They can test classified into two broad categories: tintack and non-contact. Laser triangulation scanner (LT5), magnetic resonance images [MRI1. and computer tomography [CT are commonly used as non-contact devices. Contact digitizers mainly have CMM and cross-sectional imaging measurement [CIM) Feature extraction i5 normally achieved by segmenting the digitized data and capturing surface features such as edges. Part modeling is fulfilled a variety of surface to the segmented data points.
The development process from initial conceptual design to commercial product is an iterative process which includes: product design: analysis of performance safety and reliability; product prototyping for experimental evaluation; and design modification. Therefore, any step of the new product development process has a direct and Strong influence an time-to-market in short order. A good product development system must enable designer’s car design team4 to consider all aspects of product design, manufacturing, selling and recycling at the early stage of the design cycle. So that design iteration and changes can be made easily and effectively. The mare hunt the feedback is the higher possibility of success the system has design for manicuring [DFM) and concurrent engineering necessitate that product and process design be developed simultaneously rather than sequentially.
The integrated system of rapid product development is composed of four modules: tai proto type , physical prototype and rapid tooling. The product development stags from the creation of a 3D CAD model using a CAD software package.
At that stage, the product geometry is defined and its aesthetic and dimensional characteristics are verified. The main function of digital prototype is to perform 3D CAD modeling. The CAD model is regarded as a central component of the whale system or project information base which means that in all design, analysis and manufacturing activities the same data is utilized. The product and its components are directly designed on a 3D CAD system; during the creative design. If a physical part is ready, the model can be constructed by the reverse engineering technique. RE is a method for constructing CAD models of physical party by digitizing an existing part, creating a digital model and then using it to manufacture components. RE can reduce the development cycle when redesigns become necessary for improved product quality. Preexisting parts with features for improved performance can he readily incorporated into the desired part design. Therefore, it is very useful in creating the CAD model of an existing part when the engineering design has gone through many design changes.
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