Rapid prototyping
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This document provides an introduction to rapid prototyping, including its definition, need, categories of manufacturing processes, steps involved, benefits, limitations, and applications. Rapid prototyping is defined as the layer-by-layer creation of 3D physical models directly from 3D CAD files. It allows for testing of physical designs, trying alternative designs, and saving time over relying on a single design. The main categories of manufacturing processes are subtractive, additive, and formative. The basic steps in rapid prototyping are 3D CAD modeling, preprocessing like STL file generation and slicing, part building layer-by-layer, and postprocessing like cleaning. Benefits include the ability to produce complex shapes with reduced time,
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Rapid prototyping
This presentation deals with the rapid prototyping fundamentals, rapid tooling vs conventional tooling and types of RP such as stereolithography,fused deposition modelling , laminated object manufacturing , 3d printing and selective laser sintering.
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Rapidprototyping
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3. Post-processing the prototype by removing supports, cleaning, and finishing the surface.
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Manufacturing Processes is the title of the subject. The document outlines the teaching scheme, examination scheme, syllabus and internal assessment for the subject. The syllabus covers 6 units - casting processes, melting and molding, joining processes, conventional forming processes, advanced forming processes, and advanced manufacturing processes like rapid prototyping. Rapid prototyping involves 5 main steps - CAD modeling, CAD conversion, STL model slicing, model fabrication using techniques like stereolithography, selective laser sintering, fused deposition modeling and post-processing. It has advantages like reduced design time but also limitations such as material properties.
Addative manufacturing,Evolution,Pre processingpptx
This document provides an introduction to additive manufacturing processes. It begins with defining additive manufacturing and distinguishing it from conventional manufacturing techniques like CNC machining. It then outlines the typical additive manufacturing process chain from conceptualization to post-processing. Next, it classifies common additive manufacturing techniques into categories like liquid polymer systems, discrete particle systems, molten material systems, and solid sheet systems. Key materials like nylon that are often used in additive manufacturing are also described. The document concludes with introducing some of the advantages and limitations of additive manufacturing.
Rapid prototyping.pptx
This document summarizes the process of rapid prototyping (RP). It begins with an introduction to RP and how it uses techniques like 3D printing to directly produce physical models from 3D CAD files in a layer-by-layer process. The document then outlines the typical 5-step RP workflow of creating a CAD file, converting it to STL format, slicing the digital model into layers, building the model one layer at a time, and finishing the prototype. Several common RP technologies are described like stereolithography, selective laser sintering, and fused deposition modeling. The document also discusses benefits of RP for product design like reducing costs and improving feedback. An example of using RP to fabricate a trans-tibial
fdocuments.in_stereo-lithography-presentation.ppt
very good to have a this type of context in theRemember that a 3D printer works by depositing raw material layer by layer along the X, Y and Z axis. The accuracy of the 3D printer therefore depends upon the minimum distance the nozzle can travel vertically (the Z axis). Minimum the distance it can move, more the points along the sinusoid that it can capture, and better the accuracy.For Stratasys 3D printers, which are the pioneers of the FDM printers, the current best possible dimensional accuracy is about 0.127 mm. Of course, the choice of raw material too plays an important part in achieving dimensional stability. It should also be remembered that the accuracy comes at the cost of printing time required.
A few advantages of FDM 3D printers include: slideshare FDM 3D Printers find application in:
creating prototypes for Fit, Form and Function testing
rapid tooling patterns and mould inserts
creating and testing any parts that work under thermal loads
production of precise and complex end-use parts e.g. jigs & fixtures
Sectors that use FDM 3D Printers include:
Automotive
Aerospace
Manufacturing
Industrial
Medical
Architecture
Consumer Goods
Fashion
Education & Research
Overall, FDM 3D printers give a very high value for money and a
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This document discusses a new rapid prototyping method called CNC-RP that uses computer numerical controlled (CNC) machining to create parts layer-by-layer from multiple orientations. It begins by introducing rapid prototyping and its limitations. It then describes the CNC-RP method which machines complex parts from numerous orientations using thin layered toolpaths. The document outlines the process for creating a sample part and notes that fixture planning and processing times are reduced compared to conventional CNC machining. It proposes that CNC-RP could provide an affordable way to automatically create prototypes and tooling plans for CNC machining.
Rapid prototyping.pdf .
The document discusses rapid prototyping, which uses additive manufacturing techniques to automatically create physical prototypes from 3D CAD models in a short period of time. It specifically describes stereolithography, fused deposition modeling, and selective laser sintering as common rapid prototyping methods that build parts layer by layer from materials like plastic or metal powder. Rapid prototyping allows faster design iteration and testing compared to traditional prototyping methods.
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Rapid prototyping
- 2. CONTENTS • NEED OF PROTOTYPING • CATEGORIES OF MANUFACTURING PROCESSES. • STEPS IN RAPID PROTOTYPING PROCESS • BENEFITS OF PROTOTYPING • LIMITATIONS OF PROTOTYPING
- 3. WHAT IS PROTOTYPING AND ITS NEED? • RAPID PROTOTYPING (RP): defined as process of layer by layer creation of 3-D physical model directly from 3D-CAD. • NEED OF RP: MODEL IS MADE TO TESTED FOR ACTUAL PHYSICAL CONDITIONS TO TRY ALTERNATIVE DESIGN TO SAVE TIME ON RELYING ON SINGLE DESIGN
- 4. CATEGORIES OF MFG PROCESSES TYPES OF MANUFACTURING PROCESSES:- 1) SUBTRACTIVE MFG. PROCESSES: part is mfg. by removal of material. • Examples: Turning , Milling, Grinding etc.
- 5. CATEGORIES OF MFG PROCESSES 2) ADDITIVE MFG. PROCESSES: Object is mfg. by deposition of layer of material. Virtually no material wastage. • Examples: Rapid Prototyping.
- 6. CATEGORIES OF MFG PROCESSES 3) FORMATIVE MFG. PROCESSES: Object is mfg. by Forcing material to form in desired shape. • Examples: Forging, Bending, Drawing, Moulding Etc.
- 7. STEPS INVOLVED IN RP
- 8. STEPS INVOLVED IN RP THERE ARE BASIC THREE STEPS: 1. 3-D CAD Modelling. 2. PRE-PROCESSING STL-FILE GENERATION PART ORIENTATION SUPPORT GENERATION CHECKING OF STL FILES TRANSMISSION OF STL FILE SLICING OF STL MODEL 3. PART BUILDING. 4. POST-PROCESSING
- 9. • 3D- CAD MODELLING: 3-D model is to created for manufacturing processes using ANY 3D-CAD packages and corresponding file is saved. • PRE-PROCESSING: Standard Tessellation Language (LTD) FILE GENERATION: STL file is used to maintain format uniformity. Its represents 3D surface as an assembly of planar triangles. Part Orientation: In order to reduce RP time, cost, material requirement , the part should be oriented with minimum height. Support generation: Software allows the automatic creation and editing of support . Checking of STL Files.
- 10. Transmission of STL files: STL files are transferred to RP computer system. Slicing Of STL model: Pre-processing software slices the model into no. of layers of thickness 0.1mm to 0.5mm. Saved into SLC (stereo lithography contour) or CLI (common layer interface)format. 3) PART BUILDING : SLC format data gets transfer layer by layer and building process starts. Depending upon size and shape part takes time to build. Then the layer deposition takes place. The method of deposition depends the principle used in RP machine. Mostly Fully automated machine are used. 4) POST-PROCESSING: Process involves Removing the Part from RP machine, Cleaning and finishing.
- 11. BENEFITS OF PROTOTYPING • Almost any shape or geometric feature can be produced. • Reduction in time and cost (could range 50 – 90%. Wohler) • Errors and flaws can be detected at an early stage. • RP can be used in different industries and fields of life (medicine, art and architecture, marketing..) • Discussions with the customer can start at an early stage. • Assemblies can be made directly in one go. • Material waste is reduced. • No tooling is necessary. • The designers and the machinery can be in separate places.
- 12. LIMITATIONS OF PROTOTYPING • The price of machinery and materials. • The surface is usually rougher than machined surfaces. • Some materials are brittle.
- 15. THANK YOU