Selective Robotic Assembly

1992 ◽  
Author(s):  
Nir Berzak
Keyword(s):  
Product Quality ◽  
High Precision ◽  
Cost Reduction ◽  
Spare Parts ◽  
Robotic Assembly ◽  
Selective Assembly ◽  
New Approach ◽  
Assembly Cost

Abstract A new approach to robotic high precision selective assembly is presented. The basis for this selective assembly is a gripper which both grips the part to be assembled along its mating planes and inspects its dimensions while gripping. One hundred percent interchangeability of spare parts is achieved by selecting the appropriate parts for inventory, during assembly. Cost reduction and the increase in product quality are shown by example.

Diamond Machinable Sol-Gel Silica Based Hybrid Coatings for High Precision Optical Molds

2010 ◽  
Vol 438 ◽  
pp. 65-72 ◽  
Author(s):  
Andreas Mehner ◽  
Ju An Dong ◽  
Timo Hoja ◽  
Torsten Prenzel ◽  
Yildirim Mutlugünes ◽  
...  
Keyword(s):  
Injection Molding ◽  
High Precision ◽  
Sol Gel ◽  
Processing Parameters ◽  
Hybrid Coatings ◽  
Optical Elements ◽  
Optical Components ◽  
New Approach ◽  
Free Silica ◽  
Gel Processing

The demand for high precision optical elements as micro lens arrays for displays increases continually. Economic mass production of such optical elements is done by replication with high precision optical molds. A new approach for manufacturing such molds was realized by diamond machinable and wear resistant sol-gel coatings. Crack free silica based hybrid coatings from base catalyzed sols from tetraethylorthosilicate (TEOS: Si(OC2H5)4) and methyltriethoxysilane (MTES: Si(CH3)(OC2H5)3) precursors were deposited onto pre-machined steel molds by spin coating process followed by a heat treatment at temperatures up to 800°C. Crack-free multilayer coatings with a total thickness of up to 18 µm were achieved. Micro-machining of these coatings was accomplished by high precision fly cutting with diamond tools. Molds with micro-structured coatings were successfully tested for injection molding of PMMA optical components. The wear resistance of the coatings was successfully tested by injection molding of 1000 PMMA lenses. Hardness and elastic modulus of the coatings were measured by nano indentation. The chemical composition was measured by X-ray photo electron spectroscopy (XPS) as a function of the sol-gel processing parameters.

scholarly journals PENGARUH KUALITAS PRODUK TERHADAP KEPUTUSAN PEMBELIAN HANDPHONE NOKIA DENGAN CITRA MEREK SEBAGAI PEMEDIASI

2018 ◽  
Vol 8 (3) ◽  
pp. 1374
Author(s):  
Kadek Ayuk Riska Oktavenia ◽  
I Gusti Agung Ketut Sri Ardani
Keyword(s):  
Mobile Phone ◽  
Product Quality ◽  
Brand Image ◽  
Spare Parts ◽  
Partial Least Square ◽  
Least Square ◽  
Significant Positive Effect ◽  
Purchasing Decision ◽  
Analysis Technique ◽  
Positive Effect

This study aims to determine the effect of product quality on Nokia mobile phone purchase decision  with brand image as mediator. This  research was conducted in Denpasar  City. The  number of samples taken is 99 samples with  nonprobability sampling method, especially Accidental sampling or convenience sampling. The data were collected through questionnaires with Likert scale 1-5. The analysis technique used is Partial Least Square (PLS) analysis. The results of the study found that product quality has a significant positive effect on purchasing decision, brand  image hasa significant positive effect on purchasing  decision, product quality has a significant positive effect on brand image and brand image mediating the effect of product quality on purchasing decision. Companies should conduct market research to make the product or product specifications suitable and suitable to be incorporated in Nokia mobile phone products. In the service, the company must work together with various vendors of Nokia mobile phones both sales and service spare parts, service, and guarantees by multiplying the cooperation with them, with these consumers will easily obtain the services needed.

Automatic inference on stable robotic assembly sequences based upon the evaluation of base assembly motion instability

Robotica ◽  
1993 ◽  
Vol 11 (4) ◽  
pp. 351-362 ◽  
Author(s):  
D.Y. Cho ◽  
C.K. Shinf ◽  
H.S. Chot
Keyword(s):  
Robotic Assembly ◽  
Fixture Design ◽  
Assembly Sequence ◽  
Inference Method ◽  
New Approach ◽  
Assembly Sequences ◽  
Crucial Information ◽  
Part Motion ◽  
Selection Of

SUMMARYThe consideration of part motion instability is crucial to the determination of assembly sequence since this affects the complexity of fixtures and dexterity of robots. This paper presents a new approach to the inference of robotic assembly sequences, taking into consideration the instability of base assembly motions. Based upon the evaluation of motion instability, the method generates stable assembly sequences by use of the precedence constraint inference method previously developed by the authors. An example assembly of a 10-part electrical relay is given to illustrate the concepts and procedure of the proposed scheme. The results show that the proposed method can be effectively utilized to generate stable assembly sequences, thus providing crucial information on the fixture design and selection of types of assembly robots.

scholarly journals Towards a fully automated eclipsing binary solver for Gaia

2008 ◽  
Vol 4 (S253) ◽  
pp. 402-403
Author(s):  
Brandon Tingley ◽  
Gilles Sadowski ◽  
Christos Siopis
Keyword(s):  
Radial Velocity ◽  
High Precision ◽  
Eclipsing Binaries ◽  
Physical Parameters ◽  
Graphical Interface ◽  
Velocity Measurements ◽  
New Approach ◽  
Eclipsing Binary ◽  
Photometric Observations

AbstractGaia, an ESA cornerstone mission, will obtain of the order of 100 high-precision photometric observations and lower precision radial velocity measurements over five years for around a billion stars – several hundred thousand of which will be eclipsing binaries. In order to extract the characteristics of these systems, a fully automated code must be available. During the process of this development, two tools that may be of use to the transit community have emerged: a very fast, simple, detached eclipsing binary simulator/solver based on a new approach and an interacting eclipsing binary simulator with most of the features of the Wilson-Devinney and Nightfall codes, but fully documented and written in easy-to-follow and highly portable Java. Currently undergoing development and testing, this code includes an intuitive graphical interface and an optimizer for the estimation of the physical parameters of the system.

A new approach to nullify surplus parts in selective assembly

2011 ◽  
Vol 3 (5/6) ◽  
pp. 492
Author(s):  
S. Saravana Sankar ◽  
S.G. Ponnambalam ◽  
M. Victor Raj
Keyword(s):  
Selective Assembly ◽  
New Approach ◽  
Surplus Parts

The Discrete Event Control of Robotic Assembly Tasks

1995 ◽  
Vol 117 (3) ◽  
pp. 384-393 ◽  
Author(s):  
B. J. McCarragher ◽  
H. Asada
Keyword(s):  
Discrete Event ◽  
Experimental Results ◽  
Robotic Assembly ◽  
New Approach ◽  
Discrete Event Dynamic System ◽  
Discrete Event Control ◽  
Event Dynamic ◽  
Assembly Tasks ◽  
Modeling Task ◽  
Task Level

A new approach to process modeling, task synthesis, and motion control for robotic assembly is presented. Assembly is modeled as a discrete event dynamic system using Petri nets, incorporating both discrete and continuous aspects of the process. The discrete event modelling facilitates a new, task-level approach to the control of robotic assembly. To accomplish a desired trajectory a discrete event controller is developed. The controller issues velocity commands that direct the system toward the next desired contact state, while maintaining currently desired contacts and avoiding unwanted transitions. Experimental results are given for a dual peg-in-the-hole example. The experimental results not only demonstrate highly successful insertion along the optimal trajectory, but also demonstrate the ability to detect, recognize and recover from errors and unwanted situations.

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