Advanced Fixture Design Method and Its Application

2021 ◽  
Author(s):  
Guohua Qin
Keyword(s):  
Design Method ◽  
Fixture Design

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.

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

2004 ◽  
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 such that the part can be manufactured to design specifications. To reduce design costs associated with fixturing, various computer-aided fixture design (CAFD) methods have been developed through the years to assist the fixture designer. One approach is to use a case-based reasoning (CBR) method where relevant design experience is retrieved from a design library, and adapted to provide a new fixture design solution. Indexing design cases is a critical issue in any CBR approach, and CBR systems can suffer from an inability to distinguish between cases if indexing is inadequate. This paper presents a CAFD methodology, entitled CAFixD, that adopts a rigorous approach to defining indexing attributes in which axiomatic design functional requirement decomposition is adopted. Thus, 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 re-constituted to form a complete fixture design. Furthermore, adaptability is used as the basis by which designs are retrieved in place of the normal attribute similarity approach, which can sometimes return a case that is difficult or impossible to fix. This paper presents the CAFixD framework and operation, and discusses in detail the indexing mechanisms used.

scholarly journals PERANCANGAN ULANG MACHINING FIXTURE UNTUK PRODUK CYLINDER HEAD DAN COVER CRANKCASE TIPE 168

2020 ◽  
Vol 6 (1) ◽  
pp. 1-7
Author(s):  
Asep Indra Komara
Keyword(s):  
Production Process ◽  
Cylinder Head ◽  
Design Method ◽  
Work Productivity ◽  
Machining Process ◽  
Process Time ◽  
Fixture Design ◽  
Clamping Force ◽  
Engineering Software ◽  
Engine Components

The cylinder head and crankcase cover are components of an engine produced by a manufacturing company in Tangerang. Companies need to make improvements to the production process of these components in order to compete with their competitors. The improvement of the production process is done by improving the machining process stages and re-designing the engine product fixture. Actually the company already has a fixture for the engine machining process, but the fixture cannot be used to produce engine components because it still does not function properly. The problem that occurs is the deviation of the dimensions of machining results and the ineffectiveness of the machining process thereby reducing work productivity. Therefore, it is necessary to design a new fixture that is able to answer both of these problems. Fixture design through the application of the VDI 2222 method combined with the design method according to the Handbook of Jig Fixture has resulted in a fixture design and estimated new machining process time for engine components. The fixture design is then analyzed and validated using engineering software to ensure the fixture's rigidity of the clamping force, machining force, and deflection that occur during the machining process which can have an impact on dimensional deviations. Based on the results of the study conducted, a fixture design for machining cylinder head and crankcase cover products has been produced with fixture dimensions of 450 x 459 x 1125 with a weight of 190 kg. The time needed to complete the cylinder head product is 308.67 seconds and the crankcase cover is 224.19 seconds. The maximum clamping force required is 0.36 kN. Deflection that occurs in the clamping rod is 0.0048 mm, the fixture frame is 0.029 mm and the product deformation is 0.06 mm. The fixture design is expected to be able to solve the problems that exist in the company today.

scholarly journals Work holding assessment of an UV adhesive and fixture design method

2019 ◽  
Vol 106 (1-2) ◽  
pp. 741-752
Author(s):  
Shaoming Yao ◽  
Erdem Ozturk ◽  
David Curtis ◽  
Tom McLeay
Keyword(s):  
Design Method ◽  
Work Piece ◽  
Grinding Process ◽  
Fixture Design ◽  
Test Rig ◽  
Strength Criteria ◽  
Safety Coefficient ◽  
Part Geometry ◽  
Definition Of ◽  
Cleaning Methods

AbstractAdhesive work holding can be used to minimize clamping distortion and provide greater access to a work piece during machining. This paper proposes shear and tensile strength criteria to evaluate the work holding strength of adhesive grippers and definition of a strength safety coefficient of adhesive grippers. It also demonstrates a case study of work holding design with an UV adhesive for a grinding process based on a strength criteria explained in the paper. A test rig has been designed and manufactured to assess the capability of an adhesive work holding material. Tests include measurement of strength and repeatability of adhesion under different film thicknesses, curing times and pre-cleaning methods. The test shows the strength repeatability is less than ± 20%, which is good enough for many work holding applications. A shear-tensile combined strength can be evaluated by the strength sphere in a fixture design of a specific part geometry for production by the combined safety coefficient. Following the test rig assessment, a fixture has been designed with 3 grippers to demonstrate the adhesive for a grinding process with a simple part geometry. The method has a high potential for application in industry, and is not limited to the given part geometry and machining method. The grinding test shows that the adhesive work holding is strong enough for the application and that similar results can be expected for milling and turning with a good gripper arrangement.

scholarly journals Design of Bacteria Bottle Clamping Elements Based on Regression Models

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Wenshuo Gao ◽  
Weidong Song ◽  
Tianhang Ding ◽  
Jiaoling Wang
Keyword(s):  
Response Surface ◽  
Regression Models ◽  
Design Method ◽  
Labor Cost ◽  
Vital Role ◽  
Fixture Design ◽  
Single Factor ◽  
Assembly Quality ◽  
Surface Method ◽  
Downward Displacement

The fixture design of the bacteria bottle plays a vital role in designing a bottled fungus picking robot to save labor cost in the picking process of bottled fungus. This paper proposed a kind of clamping element design method based on regression models. Several sets of clamping elements were designed according to the appearance data of bacteria bottle. A single-factor test was conducted by using these clamping elements, and three levels of every factor were selected to obtain the desired values of clamping elements. Then, a Box–Behnken test was performed by selected levels. The established regression models described a numeric relationship between the variation of vital measurement points and all variation sources under a precise clamping element layout. To solve the problems in obtaining the direct parameters, a response surface method was presented based on the regression models. Finally, a test was used to demonstrate the effect of the optimized clamping elements when clamping a bacteria bottle. Through the related analysis and optimization, it was demonstrated that the holding effect of the clamping elements was the best under these conditions: the inner arc area was 4948 mm2; the downward displacement was 1.48 mm; and the rubber thickness was 3.69 mm. It showed that the proposed method was feasible, and the assembly quality after optimizing had been greatly improved. It can provide a reference for designing the bottle fixture of a picking machine.

scholarly journals A flexible fixture design method research for similar automotive body parts of different automobiles

2018 ◽  
Vol 10 (2) ◽  
pp. 168781401876127
Author(s):  
Kuigang Yu ◽  
Shiya Wang ◽  
Yanan Wang ◽  
Zhihong Yang
Keyword(s):  
Design Method ◽  
Fixture Design ◽  
Body Parts ◽  
Automotive Body ◽  
Automotive Body Parts

Research on the Design Method of Component-Based Modular Fixture

2012 ◽  
Vol 215-216 ◽  
pp. 197-201 ◽  
Author(s):  
Hong Guo ◽  
Si Qin Pang ◽  
Xian Guo Yan ◽  
Rong Zhang ◽  
Zhong Liu ◽  
...  
Keyword(s):  
Design Method ◽  
Fixture Design ◽  
Part Family ◽  
Modular Fixture ◽  
Design Time ◽  
Fixture Element ◽  
Wear And Tear ◽  
The Relationship

On the basis of the traditional assemble method of components modular fixture, the establishment of a component-based modular fixture design method was proposed in the paper. First of all, the concept of modular fixture components was put forward, and then the components according to different functions were classified, and the relationship table between the components and elements were established. At last of this paper, the application of this method was introduced through an instance. While designing fixture for part family, this method can utmost save design time and minimize the quantity of disassembling of combined fixture element, reduce the wear and tear of components, and shortening the time of manufacturing.

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