Geometry Assurance Integrating Process Variation With Simulation of Spring-In for Composite Parts and Assemblies

2016 ◽  
Vol 16 (3) ◽  
Author(s):  
Cornelia Jareteg ◽  
Kristina Wärmefjord ◽  
Christoffer Cromvik ◽  
Rikard Söderberg ◽  
Lars Lindkvist ◽  
...  
Keyword(s):  
Process Variation ◽  
New Product ◽  
Metal Parts ◽  
Geometrical Variation ◽  
New Feature ◽  
Assurance Process ◽  
Variation Simulation ◽  
Integrating Process ◽  
Real Complex

Geometrical variation and deviation in all the manufacturing processes affect the quality of the final product. Therefore, geometry assurance is an important tool in the design phase of a new product. In the automotive and aviation industries where the use of composite parts is increasing drastically, new tools within variation simulations are needed. Composite parts tend to deviate more from nominal specification compared to metal parts. Methods to simulate the manufacturing process of composites have been developed before. In this paper, we present how to combine the process variation simulation of composites with traditional variation simulations. The proposed method is demonstrated on a real complex subassembly, representing part of an aircraft wing-box. Since traditional variation simulation methods are not able to capture the spring-in and the special deviation behavior of composites, the proposed method adds a new feature and reliability to the geometry assurance process of composite assemblies.

Geometry Assurance Integrating Process Variation With Simulation of Spring-In for Composite Parts and Assemblies

2014 ◽  
Author(s):  
Cornelia Jareteg ◽  
Kristina Wärmefjord ◽  
Christoffer Cromvik ◽  
Rikard Söderberg ◽  
Lars Lindkvist ◽  
...  
Keyword(s):  
Process Variation ◽  
New Product ◽  
Metal Parts ◽  
Geometrical Variation ◽  
New Feature ◽  
Assurance Process ◽  
Variation Simulation ◽  
Integrating Process ◽  
Real Complex

Geometrical variation and deviation in all manufacturing processes affect quality of the final product. Therefore geometry assurance is an important tool in the design phase of a new product. In the automotive and aviation industries where the use of composite parts is increasing drastically, new tools within variation simulations are needed. Composite parts tend to deviate more from nominal specification compared to metal parts. Methods to simulate the manufacturing process of composites have been developed before. In this paper we present how to combine the process variation simulation of composites with traditional variation simulations. The proposed method is demonstrated on a real complex subassembly, representing part of an aircraft wing-box. Since traditional variation simulation methods are not able to capture the spring-in and the special deviation behavior of composites, the proposed method adds a new feature and reliability to the geometry assurance process of composite assemblies.

Combining Variation Simulation With Thermal Expansion for Geometry Assurance

2012 ◽  
Author(s):  
Samuel Lorin ◽  
Lars Lindkvist ◽  
Rikard Söderberg ◽  
Robert Sandboge
Keyword(s):  
Thermal Expansion ◽  
Automotive Industry ◽  
Room Temperature ◽  
Thermal Stresses ◽  
Development Phase ◽  
Functional Quality ◽  
Geometrical Variation ◽  
The Right ◽  
Variation Simulation

In every set of assembled products there are geometrical variation and deviations from nominal dimensions. This can lead to products that are difficult to assemble or products not fulfilling functional or aesthetical requirements. In several industries variation simulation is used to predict assembly variation in the development phase. This analysis is usually done under the condition of room temperature only. However, for some materials, such as plastics, the thermal expansion can be significant in the intended environmental span of the product. In an assembly, this can lead to thermal stresses and parts that will deform. To avoid this problem, locating schemes need to be designed to allow for the right behavior while exposed to varying temperatures. In this work the effect of thermal expansion is studied in the context of variation simulation. A virtual tool for this end is also presented. An example from the automotive industry is used where the combined effect of thermal expansion and assembly variation is analyzed. It is shown that it may not be sufficient to simply add the result from thermal analysis to assembly variation. Hence, to assure the geometrical and functional quality of assembled products, during its use, variation simulations need to be combined with thermal stresses.

Variation Feedback and 3D Visualization of Geometrical Inspection Data

2009 ◽  
Author(s):  
Fredrik Wandeba¨ck ◽  
Rikard So¨derberg ◽  
Johan S. Carlson ◽  
Per-Johan Wahlborg ◽  
Lars Lindkvist ◽  
...  
Keyword(s):  
Manufacturing Process ◽  
3D Visualization ◽  
Sources Of Variation ◽  
Feature Based ◽  
Geometrical Variation ◽  
Production Output ◽  
Inspection Data ◽  
Variation Simulation ◽  
Industrial Problem

There is no type of manufacturing process that is not afflicted by variation. Activities intended to ensure the quality of a company’s geometry processes are usually referred to as geometry assurance activities. One clear industrial problem is to understand the relations between the products concept and the manufacturing process. Dimensional data is a very important source of experience of how a product’s geometry has worked in the interaction with the actual manufacturing system. Users therefore need good analysis and presentation tools of geometry outcomes to support both the product developers and production engineers in the analysis of the production output and its consequences. Today the dimensional data can be difficult to obtain or access, and is not necessarily presented in such a way as to provide the user with all necessary information. This paper presents how presentation and analysis tools of geometrical inspection data can be taken a step further. New functionality for feature based 3D visualization of inspection data has been developed which integrates the variation simulation platform and the inspection data database. The goal has been to create better tools for analysis of geometrical variation and increase the understanding of the sources of variation.

A Framework for Non-Nominal Visualization and Perceived Quality Evaluation

2011 ◽  
Author(s):  
Ola Wagersten ◽  
Karin Forslund ◽  
Casper Wickman ◽  
Rikard So¨derberg
Keyword(s):  
Industrial Process ◽  
Perceived Quality ◽  
Product Development Process ◽  
Functional Quality ◽  
Quality Aspects ◽  
System Solution ◽  
Comprehensive Framework ◽  
Variation Simulation ◽  
Support Evaluation

Perceived Quality clusters different aspects that influence the customer’s perception of non-functional quality on a product that are perceive through senses. All together those aspects and the harmony between them reflect the producer’s ability to control product parameters and thereby also mirror the functional quality of the product. High Perceived Quality cannot be added to the product at the end of the developing process. Project prerequisites, system solution, factory capability etc. are criterion to succeed. Therefore, it is important to be able to evaluate Perceived Quality early in the process when product system solutions and architecture are defined, although data maturity is low. This paper presents a comprehensive framework to manage and support evaluation of Perceived Quality aspects in a product development process. The framework is based on an industrial process in combination with recent research within the field. The framework focuses on activities that can be performed at different stages in the developing process based on maturity of the CAD or styling data. For example, if the styling data is divided into different components by split-lines it has reached higher level of maturity then styling data that not has been divided. Consequently, the choice of applied method is based on data maturity, regardless phase in the developing process. The framework contains methods based on several different simulation and analysis techniques. Design methods, Computer-Aided Tolerancing and FEA based non-rigid variation simulation are represented in the framework.

Tool workspace consideration for assembly plan generation

2021 ◽  
Vol 41 (5) ◽  
pp. 612-625
Author(s):  
Akram Bedeoui ◽  
Riadh Ben Hadj ◽  
Moncef Hammadi ◽  
Nizar Aifaoui
Keyword(s):  
Collision Detection ◽  
New Product ◽  
Production Costs ◽  
Assembly Sequence ◽  
Content Type ◽  
Plan Generation ◽  
Assembly Sequences ◽  
Dynamic Interference ◽  
Time Decrease

Purpose During the design of a new product, the generation of assembly sequences plans (ASPs) has become one of the most important problems taken into account by researchers. In fact, a good mounting order allows the time decrease of the assembly process which leads to the reduction of production costs. In this context, researchers developed several methods to generate and optimize ASP based on various criteria. Although this paper aims to improve the quality of ASP it is necessary to increase the number of criteria which must be taken into account when generating ASPs. Design/methodology/approach In this paper, an ASP generation approach, which is based on three main algorithms, is proposed. The first one generates a set of assembly sequences based on stability criteria. The obtained results are treated by the second algorithm which is based on assembly tools (ATs) workspace criterion. An illustrative example is used to explain the different steps of this proposed approach. Moreover, a comparative study is done to highlight its advantages. Findings The proposed algorithm verifies, for each assembly sequence, the minimal required workspace of used AT and eliminates the ASPs non-respecting this criterion. Finally, the remaining assembly sequences are treated by the third algorithm to reduce the AT change during the mounting operation. Originality/value The proposed approach introduces the concept of AT workspace to simulate and select ASPs that respect this criterion. The dynamic interference process allows the eventual collision detection between tool and component and avoids it. The proposed approach reduces the AT change during the mounting operations.

Using Key Characteristics to Balance Cost and Quality During Product Development

1997 ◽  
Author(s):  
Anna C. Thornton
Keyword(s):  
Product Development ◽  
Product Quality ◽  
Lower Cost ◽  
Process Variation ◽  
Aircraft Manufacturing ◽  
Product Features ◽  
Key Characteristics ◽  
Manufacturing Variation ◽  
Positive Return

Abstract Corporations are spending significant resources to reduce the effect of manufacturing variation on product quality as well as adopt lower cost manufacturing and assembly technologies to reduce the end costs in product development. However, to ensure that these investments have a positive return, efforts must be made to put resources into those areas where there will be the largest return. This paper describes a formalized method to make these decisions. The analysis focuses the tradeoff studies on the Key Characteristics (KCs) of the product. KCs, in use in a variety of industries, are the product features that are most sensitive to existing manufacturing and process variation and will affect the end quality of the product. Two examples from the aircraft manufacturing environment are used describe the application of the proposed methods.

Competitive Entry of Information Goods Under Quality Uncertainty

2021 ◽  
pp. 1-20
Author(s):  
Zan Zhang ◽  
Guofang Nan ◽  
Minqiang Li ◽  
Yong Tan
Keyword(s):  
Product Quality ◽  
New Product ◽  
High Price ◽  
Quality Uncertainty ◽  
Information Goods ◽  
Consumer Uncertainty ◽  
Willingness To Adopt ◽  
Marketing Activities ◽  
Very High

When confronted with a new product, consumers often find it difficult to predict how it will perform, and such uncertainty reduces consumers’ willingness to adopt the product. In this paper, we consider a market whereby consumers decide when and which product to buy, given that they know the product quality of the incumbent but are uncertain about that of the entrant. We investigate how consumer uncertainty about product quality affects firms’ behavior-based pricing and customer acquisition and retention dynamics. Using a two-period vertical model, we find that, under high-end encroachment, an increase in consumer uncertainty reduces the entrant’s profit and hurts the incumbent’s profit when the quality differential between the products is relatively small, whereas, under low-end encroachment, increasing uncertainty not only benefits the incumbent but also can favor the entrant. An important implication for entrants is that the marketing activities, which aim to reduce consumer uncertainty about product functionalities, may fail to improve profitability. We also find that the entrant lowers the price for uninformed customers and raises the price for repeat buyers under high-end encroachment but lowers the price for all customers under low-end encroachment. We further examine the subsidy strategy and show that, when the entrant’s product has a significant quality advantage and consumer uncertainty is high but not very high, the optimal strategy for the entrant is to acquire all consumers who do not buy from the incumbent by providing subsidies and to drop the low-valuation customers by means of a high price after their uncertainty is resolved.

scholarly journals Determining optimal process parameters for sprouting buckwheat as a base for a food seasoning of improved quality

2021 ◽  
Vol 4 (11(112)) ◽  
pp. 6-16
Author(s):  
Ayana Serikbaeva ◽  
Bagimkul Tnymbaeva ◽  
Maryna Mardar ◽  
Nataliіa Tkachenko ◽  
Saniya Ibraimova ◽  
...  
Keyword(s):  
Mass Fraction ◽  
Nutritional Value ◽  
Control Sample ◽  
Total Content ◽  
New Product ◽  
Optimal Process ◽  
Protein Fiber ◽  
New Type ◽  
Germination Parameters

In order to determine the influence of temperature and time of germination of the Bogatyr variety buckwheat on a change in the content of vitamins E, C, and B group, the germination parameters were optimized when developing a new type of seasoning. To optimize the germination parameters, the response surface methodology was used. The maximum total content of B, E, and C group vitamins in the sprouted buckwheat (4.591 mg/100 g) was observed at a temperature of 21.5 °C and the duration of germination of 3 days. The Bogatyr variety buckwheat was sprouted for 4 days. Changes in the nutritional and biological value of the sprouted grains were registered after 24 hours. Based on the comparative chemical analysis, it was established that the content of protein, fiber, vitamins, amino acids increases during the germination of buckwheat in comparison with the control sample. The protein content on day 4 increases by 1.38 times compared to control. At the same time, the mass fraction of carbohydrates on day 4 is reduced by 1.57 times; the mass fraction of fat ‒ by 2 times. It was established that the prototype seasoning that contains 30 % of sprouted buckwheat is characterized by a higher content of protein, vitamins, micro-and macronutrients compared to the control sample (without the addition of sprouted buckwheat). Adding the sprouted buckwheat grain to the seasoning has made it possible to increase by 25 % the antioxidant activity of the finished product compared to the control sample, which is 259.09 and 383.72 mg/100 g, respectively. In terms of safety indicators, the new product fully complies with the requirements for sanitary and hygienic safety. The results reported here give reasons to recommend the production of a new type of seasonings of enhanced nutritional value based on the sprouted Bogatyr variety buckwheat, which could expand and improve the quality of nutrition

scholarly journals Manajemen Mutu Input Kelompok Bimbingan Ibadah Haji Indonesia

2017 ◽  
Vol 11 (2) ◽  
pp. 277-292
Author(s):  
Aep Kusnawan ◽  
Arif Rahman ◽  
Dede Lukman ◽  
Encep Dulwahab
Keyword(s):  
Quality Assurance ◽  
Quality Management ◽  
Qualitative Approach ◽  
One Dimension ◽  
Management Standard ◽  
Quality Assurance Process ◽  
Starting Point ◽  
Assurance Process

Hajj guidance group (KBIH) in Indonesia, still limited to quantity and have been not yet met the quality. One indication of the lack of quality of the KBIH is the quality management of inputs, namely the applied inputs and inputs of expectation. With good input and good, it can produce an out put that as expected. This study aims to determine the quality management of pilgrimage inputs by KBIH in Indonesia, represented by three regions, West Java, DKI Jakarta and South Sumatra. The method used in this research is case study with qualitative approach. This study shows that quality management for one dimension of input, especially in KBIH has not met the quality management standard. Implementation and embodiment is still limited to ideas, wishful thinking, and not conceptualized well. The results of this study have an impact on how the quality management of KBIH input in Indonesia should be implemented, so that with good input in KBIH, KBIH can improve the quality of Hajj in Indonesia. Input is a starting point in a quality assurance process, not to be ignored, underestimated, and considered not one of the important parts of quality management of its existence.Kelompok Bimbingan Ibadah Haji (KBIH) yang banyak berdiri di Indonesia, masih sebatas kuantitas belum memenuhi kualitas. Salah satu indikasi melihat kurangnya kualitas KBIH ialah pada manajemen mutu input, yaitu input terapan maupun input harapan. Dengan input yang baik dan bagus, maka bisa menghasilkan out put yang sesuai harapan. Penelitian ini bertujuan untuk mengetahui manajemen mutu input penyelenggaraan haji oleh KBIH di Indonesia, yang diwakili tiga wilayah, Jawa Barat, DKI Jakarta dan Sumatera Selatan. Metode yang digunakan dalam penelitian ini adalah studi kasus dengan pendekatan kualitatif. Penelitian ini memperlihatkan bahwa manajemen mutu untuk satu dimensi input, khususnya di KBIH belum memenuhi standar manajemen mutu. Pelaksanaan dan perwujudannya masih sebatas ide, angan-angan, dan belum terkonsep dengan baik. Hasil penelitian ini berdampak pada bagaimana manajemen mutu input KBIH di Indonesia seharusnya diimplementasikan, sehingga dengan input yang baik dalam KBIH, KBIH bisa meningkatkan kualitas penyelenggaraan ibadah haji di Indonesia. Input merupakan starting point dalam sebuah proses jaminan mutu, jangan sampai diabaikan, disepelekan, dan dianggap bukan salah satu bagian manajemen mutu yang penting keberadaannya.

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