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Marc Quirynen70
Estimated H-index: 70
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Ignace Naert50
Estimated H-index: 50
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D. van Steenberghe48
Estimated H-index: 48
It has been documented that the long-term clinical outcome of the Branemark® system is very favourable. However, failures do occur before and after loading. This study examined the differences in marginal bone loss between standard and self-tapping fixtures and attempted to explain excessive marginal bone loss or loss of osseointegration during the first 3 years of loading. Marginal bone loss (scored on long cone radiographs) and fixture failure rate were compared for different ...
Cited 378
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Iain M. Boyle3
Estimated H-index: 3
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Yiming Rong13
Estimated H-index: 13
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David C. Brown24
Estimated H-index: 24
A key characteristic of the modern market place is the consumer demand for variety. To respond effectively to this demand, manufacturers need to ensure that their manufacturing practices are sufficiently flexible to allow them to achieve rapid product development. Fixturing, which involves using fixtures to secure workpieces during machining so that they can be transformed into parts that meet required design specifications, is a significant contributing factor towards achieving ma...
Ref 88Cited 73
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Darek Ceglarek22
Estimated H-index: 22
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Jianjun Shi37
Estimated H-index: 37
In this paper, a fault diagnostic method is proposed for autobody assembly fixtures. This method uses measurement data to detect and isolate dimensional faults of part caused by fixture. The proposed method includes a predetermined variation pattern model and a fault mapping procedure. The variation pattern model is based on CAD information about the fixture geometry and location of the measurement points. This fault mapping procedure combines Principal Component Analysis wi...
Ref 10Cited 184
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Z. M. Bi1
Estimated H-index: 1
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W. J. Zhang1
Estimated H-index: 1
The cost of designing and fabricating fixtures can amount to 10-20% of the total manufacturing system costs. To reduce manufacturing costs, a fixture system is designed to be competent in fixturing as many workpieces as possible. In mass volume production, this can be achieved by fixturing a large quantity of the same kind of workpieces. In low-to-medium volume production, however, improvement of the flexibility of fixture systems becomes a favourable way to re...
Ref 35Cited 145
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Alessandro Bettini4
Estimated H-index: 4
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Panadda Marayong11
Estimated H-index: 11
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Samuel Lang4
Estimated H-index: 4
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We present the design and implementation of a vision-based system for cooperative manipulation at millimeter to micrometer scales. The system is based on an admittance control algorithm that implements a broad class of guidance modes called virtual fixtures. A virtual fixture, like a real fixture, limits the motion of a tool to a prescribed class or range of motions. We describe how both hard (unyielding) and soft (yielding) virtual fixtures can be implemented in this...
Ref 26Cited 234
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Soo Hong Lee12
Estimated H-index: 12
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Mark R. Cutkosky59
Estimated H-index: 59
A fixture planning module is being developed as part of a computational system for concurrent product and process design. The module employs symbolic and numerical analyses at different levels of detail, from fast geometric checks to more time consuming force and friction analyses, depending on the completeness of the machining plan. In this paper we focus on the approaches used for analyzing fixture kinematics and clamping forces, including the analysis of friction. Since many ...
Cited 84
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Abstract Dimensional and form accuracy of a workpiece are influenced by the fixture layout selected for the machining operation. Hence, optimization of fixture layout is a critical aspect of machining fixture design. This paper presents a fixture layout optimization technique that uses the genetic algorithm (GA) to find the fixture layout that minimizes the deformation of the machined surface due to clamping and machining forces over the entire tool path. The a...
Ref 10Cited 112
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Cong Lu8
Estimated H-index: 8
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Hong-Wang Zhao1
Estimated H-index: 1
The purpose of the fixture layout design is to ensure the fixture positioning accuracy, which affects the resultant geometric variation of the positioned workpiece directly. The N–2–1 locating principle is widely applied in the fixture design for deformable sheet metal workpiece, not only for locating the workpiece, but also for restraining the excessive workpiece deformation. This paper proposes an approach to optimizing fixture layout for the sheet metal workpiece b...
Ref 21Cited 14
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This paper presents a modeling procedure and diagnostic algorithm for fixture related faults in panel assembly, From geometric information about the panel and fixture, a fixture fault model can be constructed off-line. Combining the fault model with inline panel dimensional measurements, the algorithm is capable of detecting and classifying multiple fixture faults. The algorithm, which relies heavily on the fault model, is based on least squares estimation. Consequent...
Ref 8Cited 108
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Per-Ingvar Brånemark42
Estimated H-index: 42
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Kerstin Gröndahl46
Estimated H-index: 46
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Lars‐Olof Öhrnell8
Estimated H-index: 8
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Despite refinements in surgical technique, including bone grafting and sophisticated prosthetic reconstructions, there are limitations to what can be achieved with bone-anchored fixed prostheses in patients with advanced atrophy of the maxillae. A new approach was suggested by a long-term study on onlay bone grafting and simultaneous placement of a fixture based on a new design: the zygoma fixture, and the aim of this study was to assess its potential. Twenty-eight consecutive pati...
Ref 7Cited 129
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