scholarly journals Rancang Bangun Fixture Perakitan Runner dan Casing Turbin Cross Flow

2019 ◽  
Vol 17 (1) ◽  
pp. 70
Author(s):  
Muas M ◽  
Baso Nasrullah ◽  
Herdiman Herdiman ◽  
Ahsan Muslimin
Keyword(s):  
Cross Flow ◽  
Welding Process ◽  
Fixture Design ◽  
Assembly Process ◽  
Functional Requirements ◽  
Assembly Method ◽  
Turbine Casing ◽  
Component Assembly ◽  
Almost All ◽  
Two Stages

One of the important turbine components to consider in its manufacture is the runner and turbine casing components. The large number of parts that must be welded and the use of tools that do not meet functional requirements causes some problems during the assembly process, the problem is due to the difficulty of obtaining straightness between the disc and runner shaft where both components occur run-out deviations that exceed the allowable tolerance, as well as casing component assembly where almost all of the joints undergo a simple welding process and use of aids causing a very large dimension deviation from the specified tolerance. The use of very simple tools will cause difficulties in controlling the dimensions or uniformity of the shape during the production process. For this reason, a fixture that is suitable for the runner and turbine casing is needed to get the assembly process that matches the specified geometry tolerance. This research makes the fixture design to be used in runner assembly and turbine casing assembly with the assembly method is carried out in stages. The design is done in five stages, namely the stage of problem statement, the stage of making needs analysis, the stage of gathering information and ideas, the stage of making temporary designs and the stage of making the final draft.  Fixture manufacturing is done in two stages, namely ordering materials (purchasing materials) and making fixture components. The final result of making runners and casings using a fixture is able to reduce the aberration in the runner and turbine casing components by producing run-outs at runners of 2.0 mm and the straightness of the casing straightness of 1.6 mm, but have not been able to achieve deviations from the targeted one mm.

CAFixD: A Case-Based Reasoning Fixture Design Method. Framework and Indexing Mechanisms

2005 ◽  
Vol 6 (1) ◽  
pp. 40-48 ◽  
Author(s):  
Iain M. Boyle ◽  
Kevin Rong ◽  
David C. Brown
Keyword(s):  
Design Method ◽  
Critical Issue ◽  
Design Solution ◽  
Case Based Reasoning ◽  
Fixture Design ◽  
Functional Requirements ◽  
Rigorous Approach ◽  
Machining Operations ◽  
Case Based ◽  
Individual Requirement

Fixtures accurately locate and secure a part during machining operations. Various computer-aided fixture design (CAFD) methods have been developed to reduce design costs associated with fixturing. One approach uses a case-based reasoning (CBR) method where relevant design experience is retrieved from a design library and adapted to provide a new design solution. Indexing design cases is a critical issue in CBR, and CBR systems can suffer from an inability to distinguish between cases if indexing is inadequate. This paper presents CAFixD, a CAFD methodology that adopts a rigorous approach to defining indexing attributes based upon axiomatic design functional requirement decomposition. A design requirement is decomposed in terms of functional requirements, physical solutions are retrieved and adapted for each individual requirement, and the design is then reconstituted to form a complete fixture design. This paper presents the CAFixD framework and operation, and discusses in detail the indexing mechanisms used.

scholarly journals Process Knowledge Graph Modeling Techniques and Application Methods for Ship Heterogeneous Models

2021 ◽  
Author(s):  
Jinfeng Liu ◽  
Jianwei Dong ◽  
Xuwen Jing ◽  
Xuwu Cao ◽  
Chenxiao Du ◽  
...  
Keyword(s):  
Process Design ◽  
Welding Process ◽  
Mapping Method ◽  
Knowledge Graph ◽  
Case Based Reasoning ◽  
Test Model ◽  
Process Knowledge ◽  
Heterogeneous Model ◽  
Heterogeneous Models ◽  
Component Assembly

Abstract In the process design and reuse of marine component products, there are a lot of heterogeneous models, causing the problem that the process knowledge and process design experience contained in them are difficult to express and reuse. Therefore, a process knowledge representation model for ship heterogeneous model is proposed in this paper. Firstly, the multi-element process knowledge graph is constructed, and the heterogeneous ship model is described in a unified way. Then, the multi-strategy ontology mapping method is applied, and the semantic expression between the process knowledge graph and the entity model is realized. Finally, by obtaining implicit semantics based on case-based reasoning and checking the similarity of the matching results, the case knowledge reuse is achieved, to achieve rapid design of the process. This method provides reliable technical support for the design of ship component assembly and welding process, greatly shortens the design cycle, and improves the working efficiency. In addition, a case study of the test model is carried out to verify the feasibility and efficiency of the proposed method.

Mathematical model of a robotized assembly in the presence of vibrations and gripper rotation

2020 ◽  
pp. 299-304
Author(s):  
M.V. Vartanov ◽  
Trung Ta Tran
Keyword(s):  
Mathematical Model ◽  
Friction Force ◽  
Rotational Motion ◽  
Robotic Assembly ◽  
Assembly Process ◽  
Dynamics Model ◽  
Assembly Method ◽  
Robot Gripper

The assembly method using the effect of rotational motion and vibration is considered. The presence of rotation allows to signifi cantly reducing the friction force in connection, which prevents the assembly process. The effect is achieved due to using the rotation of robot gripper and the vibrating device. A mathematical dynamics model of the robotic assembly process is presented

Welding Deformation Controlling for the Truck Rack Girder

2012 ◽  
Vol 217-219 ◽  
pp. 2125-2132
Author(s):  
Li Qin Li ◽  
Li Bin Zhao ◽  
Xi Min Liu ◽  
Da Yu Wang ◽  
Xing Wang Wen
Keyword(s):  
Process Control ◽  
Welding Process ◽  
Fixture Design ◽  
Welding Deformation ◽  
Control Technology ◽  
Deformation Control ◽  
Running Safety

This paper aims at the research on deformation control technology in truck rack girder. Welded deformation is minished through special welding fixture design and welding process control, thus to improve the size precision of the truck rack girder and ensure the running safety of the vehicle.

Evaluation Method of Assembly Yield in Three-Dimension Single-Station Assembly Process Based on Number-Theoretical Net and 3DCS

2013 ◽  
Vol 579-580 ◽  
pp. 270-275
Author(s):  
Ze Jun Wen ◽  
Fan Zhang ◽  
Jia Hu
Keyword(s):  
Evaluation Method ◽  
Three Dimensional ◽  
Total Sample ◽  
Three Dimension ◽  
Assembly Process ◽  
Variation Propagation ◽  
Single Station ◽  
Net Method ◽  
Component Assembly ◽  
Assembly Deviation

Evaluation method of assembly yield in three-dimension single-station assembly process is presented based on Number-Theoretical Net (NT-net) and 3DCS. Firstly, based on the analysis of fixture deviation affect assembly deviation under arbitrary layout, the three dimensional single-station assembly deviation model under arbitrary layout is developed. Then, the principle of generating good lattice point (GLP) based on NT-net method is introduced. Afterwards, taking fixture locating variations which are sampled using NT-net method for input vectors, the samples are substituted into assembly deviation model of dimension variation propagation in single-station assembly processes to get output vectors. The statistics for qualified sample is accomplished, after comparing output vectors with the variations of measuring points on component. Assembly yield in three-dimension single-station assembly processes is gained when qualified sample divided by total sample. Finally, a real case in sheet metal assembly is given as an example to calculate the assembly yield in three-dimension single-station assembly processes. The result is validated by 3DCS.

The Research & Application of Network Learning Platform Based on the Component Composition

2013 ◽  
Vol 756-759 ◽  
pp. 1860-1864
Author(s):  
Yao Wen Xia
Keyword(s):  
Software Development ◽  
Component Composition ◽  
Component Technology ◽  
Network Learning ◽  
Learning Platform ◽  
Development Framework ◽  
Assembly Method ◽  
Component Development ◽  
Assembly Technology ◽  
Component Assembly

Software development method based on component is currently a popular software production technology, its core around the component development and assembly technology. But how to combine the practical application requirements implementation based on component composition software development process is a worth studying further. According to the development of component technology, put forward a kind of network learning platform development framework based on component assembly, and study the website of component development and assembly method, apply this technology to the development of our online learning platform, results show the effectiveness of the proposed method.

Alexander and the Iranians

1980 ◽  
Vol 100 ◽  
pp. 1-21 ◽  
Author(s):  
A. B. Bosworth
Keyword(s):  
Second World War ◽  
Source Analysis ◽  
World War ◽  
Historical Evidence ◽  
Living Together ◽  
The One ◽  
Polar Opposite ◽  
Almost All ◽  
Two Stages ◽  
Second World

The last two decades have seen a welcome erosion of traditional dogmas of Alexander scholarship, and a number of hallowed theories, raised on a cushion of metaphysical speculation above the mundane historical evidence, have succumbed to attacks based on rigorous logic and source analysis. The brotherhood of man as a vision of Alexander is dead, as is (one hopes) the idea that all Alexander sources can be divided into sheep and goats, the one based on extracts from the archives and the other mere rhetorical fantasy. One notable theory, however, still flourishes and has indeed been described as one of the few certainties among Alexander's aims. This is the so-called policy of fusion. As so often, the idea and terminology go back to J. G. Droysen, who hailed Alexander's marriage to Rhoxane as a symbol of the fusion (Verschmelzung) of Europe and Asia, which (he claimed) the king recognised as the consequence of his victory. At Susa the fusion of east and west was complete and Alexander, as interpreted by Droysen, saw in that fusion the guarantee of the strength and stability of his empire. Once enunciated, Droysen's formulation passed down the mainstream of German historiography, to Kaerst, Wilcken, Berve and Schachermeyr, and has penetrated to almost all arteries of Alexander scholarship. Like the figure of Alexander himself the theory is flexible and capable of strange metamorphoses. In the hands of Tarn it developed into the idea of all subjects, Greek and barbarian, living together in unity and concord in a universal empire of peace. The polar opposite is an essay of Helmut Berve, written in the heady days before the Second World War, in which he claimed that Alexander, with commendable respect for Aryan supremacy, planned a blending of the Macedonian and Persian peoples, so that the two racially related (!)Herrenvölkerwould lord it over the rest of the world empire. On Berve's interpretation the policy had two stages. Alexander first recognised the merits of the Iranian peoples and placed them alongside the Macedonians in his court and army hierarchy. Next came the ‘Blutvermischung’, the integration of the two peoples by marriage.

Design of the Welding Fixture for the Rear Headrest Bracket of Audi

2014 ◽  
Vol 933 ◽  
pp. 615-618
Author(s):  
Katarina Monkova ◽  
Peter Monka ◽  
Andrej Andrej ◽  
Matej Somsak
Keyword(s):  
3D Model ◽  
Welding Process ◽  
Fixture Design ◽  
Virtual Model ◽  
The Real ◽  
Automated Production ◽  
Start Up ◽  
Transport Safety ◽  
Automated Process ◽  
The Right

The article deals with the welding fixture design for the rear headrest bracket of Audi. The fixture has to ensure the right position of individual components, because well done weld is the necessity of passenger ́s and transport safety. As the first, the 3D model of products was created then the fixture (and its components) was designed and at last the virtual model of the welding table for automated production was prepared in software Autodesk Inventor Professional. On the base of the model, the real fixture was manufactured and its functionality was verified in real production. The efficiency of the whole welding process increased several times in comparison with the previous hand welding activities. The initial costs invested in the automated process start-up have returned very quickly.

Sign in / Sign up

Export Citation Format

Share Document