Voxel model surface offsetting for computer-aided manufacturing using virtualized high-performance computing

Direct digital manufacturing (DDM) is the creation of a physical part directly from a computer-aided design (CAD) model with minimal process planning and is typically applied to additive manufacturing (AM) processes to fabricate complex geometry. AM is preferred for DDM because of its minimal user input requirements; as a result, users can focus on exploiting other advantages of AM, such as the creation of intricate mechanisms that require no assembly after fabrication. Such assembly free mechanisms can be created using DDM during a single build process. In contrast, subtractive manufacturing (SM) enables the creation of higher strength parts that do not suffer from the material anisotropy inherent in AM. However, process planning for SM is more difficult than it is for AM due to geometric constraints imposed by the machining process; thus, the application of SM to the fabrication of assembly free mechanisms is challenging. This research describes a voxel-based computer-aided manufacturing (CAM) system that enables direct digital subtractive manufacturing (DDSM) of an assembly free mechanism. Process planning for SM involves voxel-by-voxel removal of material in the same way that an AM process consists of layer-by-layer addition of material. The voxelized CAM system minimizes user input by automatically generating toolpaths based on an analysis of accessible material to remove for a certain clearance in the mechanism's assembled state. The DDSM process is validated and compared to AM using case studies of the manufacture of two assembly free ball-in-socket mechanisms.

show abstract

“…An example of this representation is shown in Fig. 1 [40]. The root level is shown as the large squares, known as cells.…”

Section: Sculptprint: Voxelized Computer-aided Manufacturingmentioning

confidence: 99%

Direct Digital Subtractive Manufacturing of a Functional Assembly Using Voxel-Based Models

Lynn

Dinar

Huang

et al. 2017

Journal of Manufacturing Science and Engineering

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, they are expensive, which is a major issue. This largely why they are applied mostly by large industrial corporations with a considerable capital (Chlebus, 2000;Dubovska et al, 2014;Lynn et al, 2017;Masood and Lau, 1998;Niesłony and Grzesik, 2011;Przybylski and Deja, 2007;Zaborski and Tubielewicz, 2004). The basic elements of the CNC system of a machine tool include (Honczarenko, 2008):…”

Section: Introductionmentioning

confidence: 99%

“…CNC machine tool programming is defined as "a set of activities the outcome of which is the development of a machine control program, written in a specific language and format" (Habrat and Wdowik, 2010). The control program development methods are classified as follows (Habrat and Wdowik, 2010;Lynn et al, 2017;Minquiz, 2014;Wang and Zhou, 2018):…”

Section: Introductionmentioning

confidence: 99%

A Comparative Analysis of the Impact of CNC Miller Programming on Machining Effects

Kuczmaszewski

Pieśko

Zawada-Michałowska

2018

Multidisciplinary Aspects of Production Engineering

View full text Add to dashboard Cite

This paper presents a comparison of the impact of the programming methods of a CNC miller on the machining effects. As a part of the study, the test samples were made of the EN AW-2024 aluminium alloy. The CNC machining programs compared were developed with two programming methods: by inputting the CNC machining program directly from the CNC miller's control panel (machine level programming) and in a CAM software environment (CAM programming). The machining effect indicators adopted included: machining time, surface quality, and dimensional deviation of specific geometrical features. A measurement of the machining times revealed than the CAM programming reduced the machining time up to 20% from the machining time of the machine level programming. A conclusion stands valid that CNC machining programs developed in the CAM software environment are more efficient than CNC programming directly with the CNC miller control panel, most likely due to the machining path optimisation in CAM. In addition, given the experimental test results, it was found that smaller machined errors were also obtained for CAM programming. To conclude, the comparative analysis revealed that CAM programming provided better machining results than the machine level programming.

show abstract

“…Offset curves are widely used in various computer-aided design and manufacturing (CAD/CAM) areas, such as tool path generation [1,2], 3D numerical control (NC) machining [3,4], solid modeling [5], graphics [6], and so on. However, the offset curve usually cannot be represented in a polynomial or rational form, and thus is difficult to apply in CAD systems.…”

Section: Introductionmentioning

confidence: 99%

A Novel Method of Offset Approximation along the Normal Direction with High Precision

Zhao

Zhou

2017

MCA

View full text Add to dashboard Cite

Abstract:A new algorithm is proposed for polynomial or rational approximation of the planar offset curve. The best rational Chebyshev approximation could be regarded as a kind of geometric approximation along the fixed direction. Based on this idea, we developed a wholly new offset approximation method by changing the fixed direction to the normal directions. The error vectors follow the direction of normal, and thus could reflect the approximate performance more properly. The approximation is completely independent of the original curve parameterization, and thus could ensure the stability of the approximation result. Experimental results show that the proposed algorithm is reasonable and effective.

show abstract

Voxel model surface offsetting for computer-aided manufacturing using virtualized high-performance computing

Cited by 26 publications

References 8 publications

Direct Digital Subtractive Manufacturing of a Functional Assembly Using Voxel-Based Models

Direct Digital Subtractive Manufacturing of a Functional Assembly Using Voxel-Based Models

A Comparative Analysis of the Impact of CNC Miller Programming on Machining Effects

A Novel Method of Offset Approximation along the Normal Direction with High Precision

Contact Info

Product

Resources

About