Analysing Internal Material Loads in Manufacturing Processes

2014 ◽  
Vol 1018 ◽  
pp. 83-90 ◽  
Author(s):  
Sven Kuschel ◽  
Jens Sölter ◽  
Ekkard Brinksmeier
Keyword(s):  
Surface Layer ◽  
Functional Properties ◽  
Surface Integrity ◽  
Mathematical Description ◽  
Manufacturing Process ◽  
Alternative View ◽  
Manufacturing Processes ◽  
Practical Applications ◽  
Physical Mechanisms ◽  
Machined Parts

In order to generate desired functional properties in the surface layer of machined parts, today several iterative attempts are needed to achieve the specified surface and subsurface properties. Despite progress in simulation and modelling, which is limited to individual processes and investigations, a predictive adjustment of a manufacturing process in terms of a specific state of surface integrity is not possible. In this work, an alternative view regarding manufacturing processes, based on occurring internal physical mechanisms, is presented. It is shown for several processes, that the surface integrity due to material modifications can be correlated with internal material loads occurring during the process. To utilise this method in practical applications, approaches are presented which should enable a reduction in the complexity of the mathematical description of the internal material loading states.

Surface Integrity in Notches Machining

2011 ◽  
Vol 496 ◽  
pp. 176-181 ◽  
Author(s):  
Jan Madl ◽  
Vitezslav Razek ◽  
Vaclav Koutny ◽  
Jindrich Kafka
Keyword(s):  
Surface Roughness ◽  
Surface Layer ◽  
Residual Stresses ◽  
Surface Integrity ◽  
Fatigue Cracks ◽  
Precision Machining ◽  
Material Structure ◽  
Machining Processes ◽  
High Interest ◽  
Machined Parts

Precision machining of soft and hardened materials is a topic of high interest to substitute some traditional operations. This paper deals with some aspects of the precision machining of notches. All machining processes result in changes of surface layer properties. There are changes in residual stresses, in harness, changes in material structure etc. and also in surface accuracy and surface roughness. All these characteristics may affect fatigue cracks in machined parts.

scholarly journals Metal Machining—Recent Advances, Applications, and Challenges

Metals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 580
Author(s):  
Francisco J. G. Silva
Keyword(s):  
Surface Finish ◽  
Manufacturing Process ◽  
Dimensional Accuracy ◽  
Machining Process ◽  
High Dimensional ◽  
Manufacturing Processes ◽  
Recent Advances ◽  
Metal Machining ◽  
Rapid Manufacture

Though new manufacturing processes that revolutionize the landscape regarding the rapid manufacture of parts have recently emerged, the machining process remains alive and up-to-date in this context, always presenting itself as a manufacturing process with several variants and allowing for high dimensional accuracy and high levels of surface finish [...]

Study on Geometric Tolerances Information in Integrated Manufacturing Processes

2010 ◽  
Vol 37-38 ◽  
pp. 1292-1295
Author(s):  
Yan Chao ◽  
Hai Feng Zhang ◽  
Li Qun Wu
Keyword(s):  
Life Cycle ◽  
Data Model ◽  
Manufacturing Process ◽  
Product Life Cycle ◽  
Critical Role ◽  
Manufacturing Processes ◽  
Product Life ◽  
Internet Technologies ◽  
Geometric Tolerance ◽  
Geometric Tolerances

Tolerance information plays a critical role in many steps of the product life cycle. It is especially important due to the advances in Internet technologies and increasing integration requirements from industry. In this paper, geometric tolerances information in manufacturing process (IMP) is studied, and the layered conformance level of geometric tolerances is established according to ASME Y14.5-1994, STEP and DMIS. An EXPRESS-G data model of geometric tolerance information in IMP is established. The XML language is used to represent and program the geometric tolerances information in IMP.

The Miesian courtyard house

2015 ◽  
Vol 19 (2) ◽  
pp. 123-132
Author(s):  
Luciana Fornari Colombo
Keyword(s):  
Creative Process ◽  
Historical Context ◽  
Previous Literature ◽  
Teaching Approach ◽  
Alternative View ◽  
Practical Applications ◽  
House Type ◽  
Courtyard House

Ludwig Mies van der Rohe's idea of a modern courtyard house is explored in this article considering three aspects: context stimuli, development, and practical applications. In this manner, this article provides significant contributions to the understanding of Mies's courtyard house idea. In fact, so far the stimuli and motivations behind his studies on this house type have been insufficiently explored. This obscurity has facilitated hypotheses such as that some of the courtyard house projects that Mies attributed to himself were not designed by him, but by his students and assistants. This article offers an alternative view of this issue that supports the architect's original claims by clarifying his teaching approach, creative process, and historical context. This article also clarifies the development of Mies's courtyard house idea through several projects that he designed on this theme, including the Courtyard House with Round Skylight (1934), which has been little explored in previous literature. Ultimately, this article examines the practical applications of Mies's courtyard house idea, both as a motif of student exercise and as an architectural solution for low dwellings, showing that this idea has maintained its relevance throughout the decades.

Theoretical Surface Roughness Model in High Speed Face Milling

2014 ◽  
Vol 989-994 ◽  
pp. 3331-3334
Author(s):  
Tao Zhang ◽  
Guo He Li ◽  
L. Han
Keyword(s):  
Surface Roughness ◽  
Surface Integrity ◽  
High Speed ◽  
Cutting Parameters ◽  
Angular Speed ◽  
Face Milling ◽  
Advanced Manufacturing ◽  
Roughness Model ◽  
Machined Parts ◽  
Important Object

High speed milling is a newly developed advanced manufacturing technology. Surface integrity is an important object of machined parts. Surface roughness is mostly used to evaluate to the surface integrity. A theoretical surface roughness model for high face milling was established. The influence of cutting parameters on the surface roughness is analyzed. The surface roughness decreases when the cutter radius increases, total number of tooth and rotation angular speed, while it increases with the feeding velocity. The high speed face milling can get a smooth surface and it can replace the grinding with higher efficiency.

A Goal-Oriented, Inverse Decision-Based Design Method to Achieve the Vertical and Horizontal Integration of Models in a Hot Rod Rolling Process Chain

2017 ◽  
Author(s):  
Anand Balu Nellippallil ◽  
Vignesh Rangaraj ◽  
B. P. Gautham ◽  
Amarendra Kumar Singh ◽  
Janet K. Allen ◽  
...  
Keyword(s):  
Manufacturing Process ◽  
Design Method ◽  
Manufacturing Processes ◽  
Process Chain ◽  
Structure Property ◽  
Horizontal Integration ◽  
Design Exploration ◽  
Unit Operations ◽  
Manufacturing Process Chain ◽  
Decision Based Design

Reducing the manufacturing and marketing time of products by means of integrated simulation-based design and development of the material, product, and the associated manufacturing processes is the need of the hour for industry. This requires the design of materials to targeted performance goals through bottom-up and top-down modeling and simulation practices that enables handshakes between modelers and designers along the entire product realization process. Manufacturing a product involves a host of unit operations and the final properties of the manufactured product depends on the processing steps carried out at each of these unit operations. In order to effectively couple the material processing-structure-property-performance spaces, there needs to be an interplay of the systems-based design of materials with enhancement of models of various unit operations through multiscale modeling methodologies and integration of these models at different length scales (vertical integration). This ensures the flow of information from one unit operation to another thereby establishing the integration of manufacturing processes (horizontal integration). Together these types of integration will support the decision-based design of the manufacturing process chain so as to realize the end product. In this paper, we present a goal-oriented, inverse decision-based design method to achieve the vertical and horizontal integration of models for the hot rolling and cooling stages of the steel manufacturing process chain for the production of a rod with defined properties. The primary mathematical construct used for the method presented is the compromise Decision Support Problem (cDSP) supported by the proposed Concept Exploration Framework (CEF) to generate satisficing solutions under uncertainty. The efficacy of the method is illustrated by exploring the design space for the microstructure after cooling that satisfies the requirements identified by the end mechanical properties of the product. The design decisions made are then communicated in an inverse manner to carry out the design exploration of the cooling stage to identify the design set points for cooling that satisfies the new target microstructure requirements identified. Specific requirements such as managing the banded microstructure to minimize distortion in forged gear blanks are considered in the problem. The proposed method is generic and we plan to extend the work by carrying out the integrated decision-based design exploration of rolling and reheating stages that precede to realize the end product.

scholarly journals Lego-like technologies in manufacturing power distribution boxes for contemporary radar station

2018 ◽  
pp. 59-71
Author(s):  
T. O. Gogoberidze ◽  
V. I. Klassen ◽  
V. V. Kondratev ◽  
P. V. Novikov ◽  
P. A. Tushnov
Keyword(s):  
Systems Engineering ◽  
Power Distribution ◽  
Manufacturing Process ◽  
Labour Productivity ◽  
3D Modelling ◽  
Manufacturing Processes ◽  
New Approach ◽  
Radar Station ◽  
Promising Technology ◽  
System Components

The paper considers ways of increasing labour productivity in manufacturing radioelectronic system components. We used systems engineering methods to develop a new approach to describing manufacturing processes that makes it possible to reduce assembly duration. We present a promising technology for describing a manufacturing process in small-lot production using digital 3D modelling and a Lego -like approach to design building instructions for children's construction sets.

scholarly journals Utilization of Food Processing By-products in Extrusion Processing: A Review

2021 ◽  
Vol 4 ◽  
Author(s):  
Debomitra Dey ◽  
Jana K. Richter ◽  
Pichmony Ek ◽  
Bon-Jae Gu ◽  
Girish M. Ganjyal
Keyword(s):  
Functional Properties ◽  
Low Cost ◽  
Value Added ◽  
Raw Material ◽  
Practical Applications ◽  
Extrusion Processing ◽  
High Production Rate ◽  
Wide Range ◽  
Extruded Products ◽  
By Products

The processing of agricultural products into value-added food products yields numerous by-products or waste streams such as pomace (fruit and vegetable processing), hull/bran (grain milling), meal/cake (oil extraction), bagasse (sugar processing), brewer's spent grain (brewing), cottonseed meal (cotton processing), among others. In the past, significant work in exploring the possibility of the utilization of these by-products has been performed. Most by-products are highly nutritious and can be excellent low-cost sources of dietary fiber, proteins, and bioactive compounds such as polyphenols, antioxidants, and vitamins. The amount of energy utilized for the disposal of these materials is far less than the energy required for the purification of these materials for valorization. Thus, in many cases, these materials go to waste or landfill. Studies have been conducted to incorporate the by-products into different foods in order to promote their utilization and tackle their environmental impacts. Extrusion processing can be an excellent avenue for the utilization of these by-products in foods. Extrusion is a widely used thermo-mechanical process due to its versatility, flexibility, high production rate, low cost, and energy efficiency. Extruded products such as direct-expanded products, breakfast cereals, and pasta have been developed by researchers using agricultural by-products. The different by-products have a wide range of characteristics in terms of chemical composition and functional properties, affecting the final products in extrusion processing. For the practical applications of these by-products in extrusion, it is crucial to understand their impacts on the qualities of raw material blends and extruded products. This review summarizes the general differences in the properties of food by-products from different sources (proximate compositions, physicochemical properties, and functional properties) and how these properties and the extrusion processing conditions influence the product characteristics. The discussion of the by-product properties and their impacts on the extrudates and their nutritional profile can be useful for food manufacturers and researchers to expand their applications. The gaps in the literature have been highlighted for further research and better utilization of by-products with extrusion processing.

Improvement of Surface Layer Formation Technology for Articles Produced by Layer-by-Layer Laser Sintering

2013 ◽  
Vol 379 ◽  
pp. 56-59 ◽  
Author(s):  
N.A. Saprykina ◽  
A.A. Saprykin
Keyword(s):  
Surface Layer ◽  
Powder Material ◽  
Copper Powder ◽  
Manufacturing Process ◽  
Laser Sintering ◽  
Layer By Layer ◽  
Layer Formation ◽  
Mathematical Relation ◽  
Surface Layer Formation

Mathematical relation between roughness of the surface layer of the sintered article and layer-by-layer laser sintering modes obtained from experiments conducted using copper powder material PMS-1. Authors suggest that split manufacturing process of an article and its inner part must be split to roughing, semi-finishing and finishing modes.

Dynamic Quality Prediction of Manufacturing Process Based on Extreme Learning Machine

2014 ◽  
Vol 889-890 ◽  
pp. 1231-1235
Author(s):  
Jun Guo ◽  
Yi Bing Li ◽  
Bai Gang Du
Keyword(s):  
Extreme Learning Machine ◽  
Manufacturing Process ◽  
Manufacturing Processes ◽  
Manufacturing Cost ◽  
Quality Prediction ◽  
Proposed Model ◽  
Machine Learning Approach ◽  
Learning Machine ◽  
Dynamic Quality ◽  
Quality Categories

In many manufacturing processes, the abnormal changes of some key process parameters could result in various categories of faulty products. In this paper, a machine learning approach is developed for dynamic quality prediction of the manufacturing processes. In the proposed model, an extreme learning machine is developed for monitoring the manufacturing process and recognizing faulty quality categories of the products being produced. The proposed model is successfully applied to a japanning-line, which improves the product quality and saves manufacturing cost.

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