Optimal stock removal in LOM-RP

Karunakaran, K. P.; Dibbi, Shivamurthy; Shanmuganathan, Vivekananda P; Raju, D S; Kakaraparti, Srinivasarao

doi:10.1243/0954405001518017

Cited by 6 publications

(3 citation statements)

References 4 publications

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“…Unlike other 3D printing technologies, layers of adhesive-coated paper, plastic, or metal laminates are successively glued together and cut to shape with a knife or laser cutter in LOM, [25]. Objects printed with this technique are additionally modified by machining or drilling after printing.…”

Section: Laminated-object Manufacturingmentioning

confidence: 99%

Rapid Prototyping

Um¹

2016

Solid Modeling and Applications

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The Big Picture You need to understand terminologies and various 3D rapid prototyping technologies as well as fundamental physics of the layered manufacturing. DiscoverUnderstand terminologies. Understand various applications of the rapid prototyping technology. Understand various rapid prototyping processes. Understand data structure. Understand physics of the rapid prototyping.While solid modeling and computer graphics offer tremendous opportunities for design verification and validation for design and manufacturing communities, nothing is considered to be better than a tangible solid model as a means for bridging the gap between all the communities in the manufacturing chain. Rapid prototyping is born of necessity to facilitate such needs for design verification and validation. Historically, the roots of rapid prototyping technology can be traced back to practices in topography and photosculpture. Within topography, Blanther (1892) suggested a layered method for making a mold for raised relief paper topographical maps. The process involved cutting the contour lines on a series of plates which were then stacked layer by layer. Matsubara (1974) of Mitsubishi proposed a topographical process with a photo-hardening photopolymer resin to form thin layers stacked to make a casting mold.Photosculpture was a nineteenth-century technique to create exact threedimensional replicas of objects [7]. Most famously, Francois Willeme (1860) placed 24 cameras in a circular array and simultaneously photographed an object.

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Section: Laminated-object Manufacturingmentioning

confidence: 99%

Rapid Prototyping

Um¹

2016

Solid Modeling and Applications

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“…LOM is a simple process based on the principle of lamination. As per Karunakaran et al., 31 in LOM, the pieces of each layer of the object are cut from a sheet of paper or plastic or metal, and these laminates are stacked and joined to obtain the object. The advantages of LOM are: No postcuring is required, no supports are required, and there is no change of phase of the material.…”

Section: Rp Process Classification On the Basis Of Used Raw Materialsmentioning

confidence: 99%

A review of rapid prototyping integrated investment casting processes

Pattnaik

Jha

Karunakar

2013

Proceedings of the Institution of Mechanical Engineers, Part L:

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Investment casting is competitive with all other casting processes where the size of the product is within a mutually castable range. Though investment casting is used to produce metal parts of any intricate shapes with excellent surface finish, it suffers from long lead time and high tooling costs, which makes it uneconomical for the production of either single casting, or small and medium production units. These problems could be overcome by the applications of rapid prototyping and rapid tooling technologies for low-volume investment casting production runs. The present article analyzes different classifications of rapid prototyping techniques and it reviews various investigations made on the usability of rapid prototyping- and rapid tooling-integrated investment casting process, with their advantages and limitations. The emerging areas of applications of rapid prototyping like dentistry, jewelry, surgical implants, turbine blades, etc., are accordingly discussed. Further, an elaborate discussion is made on the application of newer technologies for directly developing ceramic shells. This article also emphasizes on various future scopes possible in rapid prototyping-integrated investment casting process.

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“…They make extensive use of the concept of visibility (Woo, 1994). Karunakaran, Dibbi, Shanmuganathan, Raju and Kakaraparti (2000) and Karunakaran (2002) have developed a software program called OptiLOM which eliminates grid cutting and decubing operations in LOM-RP. In order to extract the LOM prototype from inside a box, OptiLOM splits the material inside and surrounding the object into the minimum number of extractable pieces; when the combined STL file of all these pieces and the object are made in a LOM machine, there is no requirement for grid cutting or decubing.…”

Section: Sommentioning

confidence: 99%

Segmented object manufacturing

et al. 2005

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Rapid Prototyping (RP) is a technology based on a "divide-and-conquer" strategy that enables automatic physical realization of a design without any special tooling. However, existing RP processes suffer from staircase defects since they are all based on 2.5-axis kinematics. To minimize the error due to staircase defects parts are normally built from very thin layers typically with thickness values of 0.010 to 0.300 mm. Therefore, hundreds of layers are required to produce a typical object making RP a slow and costly process. To overcome these limitations, a new RP process called Segmented Object Manufacturing (SOM) is proposed in this paper. SOM makes use of three-axis kinematics in conjunction with a novel slicing method. Slicing in SOM is based on certain visibility-based considerations and is independent of the part accuracy. Since only a few thick layers are used in the SOM technique, a part can be produced faster and cheaper with an accuracy comparable to that of CNC machining.

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Optimal stock removal in LOM-RP

Cited by 6 publications

References 4 publications

Rapid Prototyping

Rapid Prototyping

A review of rapid prototyping integrated investment casting processes

Segmented object manufacturing

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