The knitting methods for seamless garments based on four-needle bed computerized flat machine

2021 ◽  
pp. 004051752110351
Author(s):  
Lisha Lu ◽  
Gaoming Jiang ◽  
Guangjun Wu
Keyword(s):  
Design Process ◽  
Production Efficiency ◽  
Design System ◽  
Great Contribution ◽  
Pattern Design ◽  
Traditional Technology ◽  
Different Types ◽  
2D Pattern ◽  
Seamless Knitting ◽  
Transformation Methods

Seamless garments reducing the cutting and sewing processes are created using seamless knitting technology. This type of garment, being less dependent on labor, is knitted as a whole and makes a great contribution to improving production efficiency. More importantly, seamless garments are more comfortable and natural compared with those styles produced by traditional technology. However, the techniques of seamless garments are huge and complex, making the pattern design process more difficult. In addition, the seamless knitting technology has great restrictions to the styles with rich shapes due to the limitation of the devices. Therefore, how to knit more complex styles using seamless knitting technology still faces great challenges. For these reasons, this study extensively investigated the knitting principle of seamless garments and proposed six knitting models for different kinds of garments. Then the transformation methods from 3D style to 2D pattern were explored respectively based on the knitting characteristics of each model. Finally, by package programming in the SDS-ONE APEX design system, the actual knitting for six types of garments was conducted on the computerized flat knitting machine. The results showed that different types of seamless garments have significant differences in the pattern design and the approaches proposed above can make different kinds of garments using seamless knitting technology.

Three-dimensional garment pattern design using progressive mesh cutting algorithm

2019 ◽  
Vol 31 (3) ◽  
pp. 339-349 ◽  
Author(s):  
Yeonghoon Kang ◽  
Sungmin Kim
Keyword(s):  
Design Process ◽  
Three Dimensional ◽  
Projection Algorithm ◽  
Design System ◽  
Pattern Design ◽  
Content Type ◽  
Progressive Mesh ◽  
Mesh Model ◽  
Cutting Algorithm ◽  
Time Required

Purpose The purpose of this paper is to develop the core module of computer-aided three-dimensional garment pattern design system. Design/methodology/approach A progressive mesh cutting algorithm and mesh reshaping algorithm have been developed to cut a single mesh into multiple patches. A flat projection algorithm has been developed to project 3D patches into 2D patterns. Findings The software developed in this study is expected to enable its users to design complex garment patterns without the in-depth knowledge of pattern design process. Research limitations/implications The mesh model used in this study was a fixed model. It will be extended to a deformable garment model that can be resized according to the underlying body model Practical implications The software developed in this study is expected to reduce the time required for time-consuming and trial-and-error-based pattern design process. Social implications Fashion designers will be able to design complex patterns by themselves and the dependence upon expert patterners could be reduced Originality/value The progressive mesh cutting algorithm developed in this study can cut a mesh model using arbitrary lines. The mesh reshaping algorithm can improve the mesh quality of divided patches to increase the numerical stability during subsequent pattern flattening process. The flip removal algorithm can effectively remove the partially flipped mesh elements.

Process Control Method of Complex Product Multidisciplinary Collaborative Design System

2013 ◽  
Vol 712-715 ◽  
pp. 2888-2893
Author(s):  
Hai Qiang Liu ◽  
Ming Lv
Keyword(s):  
Information Sharing ◽  
Product Design ◽  
Design Process ◽  
Collaborative Design ◽  
Control Method ◽  
Integrated System ◽  
Design System ◽  
System Control ◽  
Complex Product ◽  
Product Design Process

In order to realize information sharing and interchange of complex product multidisciplinary collaborative design (MCD) design process and resources. The Process integrated system control of product multidisciplinary collaborative design was analyzed firstly in this paper, then design process of complex product for supporting multidisciplinary collaborative was introduced, a detailed description is given of the organization structure and modeling process of MCD-oriented Integration of Product Design Meta-model ; and concrete implement process of process integrated system control method was introduced to effectively realize information sharing and interchange between product design process and resources.

scholarly journals An Interactive System to Integrate the Design, Analysis, and Manufacture of Centrifugal Compressor Impellers

1990 ◽  
Author(s):  
James E. Crouse ◽  
James M. Sorokes
Keyword(s):  
Design Process ◽  
Centrifugal Compressor ◽  
Design Analysis ◽  
Design System ◽  
Interactive System ◽  
Cylindrical Coordinates ◽  
Manufacturing Software

This paper presents the impeller design system developed at Dresser-Rand using Bezier polynomials in cylindrical coordinates. A discussion of the basic techniques utilized in the code is presented as are sample graphic outputs generated to aid the user in the design process. The paper also describes some of the output options and how results may be interfaced with other analytical, drafting, and manufacturing software. Comments are included regarding the increased productivity, accuracy, and quality which resulted directly from use of this code and its support routines.

JAVA™-Based Design Calculator for Integral Snap-Fits

1999 ◽  
Author(s):  
Jung S. Oh ◽  
Dean Q. Lewis ◽  
Daeyong Lee ◽  
Gary A. Gabriele
Keyword(s):  
Experimental Data ◽  
Operating System ◽  
Case Studies ◽  
Design Process ◽  
Design Tool ◽  
The Internet ◽  
Specific Loading ◽  
Different Types ◽  
Integral Attachment ◽  
A Company

Abstract Many different types of snap-fits have been developed to replace conventional fasteners, and research efforts have been made to characterize their performance. It is often tedious to look for design equations for unique types of snap-fits to calculate the insertion and retention forces. If found, these equations tend to be long, complex, and difficult to use. For this reason, a snap-fit calculator has been created to help in designing integral attachment features. Studies of seven most commonly used snap-fits (annular snap, bayonet-and-finger, cantilever hook, cantilever-hole, compressive hook, L-shaped hook, and U-shaped, hook) were used to provide the equations implemented in this snap-fit calculator, more fasteners than any other snap-fit calculator available. This tool aids in designing snap-fits to meet specific loading requirements by allowing the designer to size the feature to obtain desired estimates for maximum insertion and retention forces. The software for this design tool was written in JAVA™ language that is independent of operating system platforms and can be distributed at a company site-wide over an intranet or worldwide over the Internet. This makes it easily accessible to a user, and universal upgrades can be achieved by simply updating the software at the server location. Designers will find this tool to be useful in the design process and the most convenient way to estimate the performance of snap-fits. This paper describes the development and operation of the IFP snap-fit calculator including several case studies comparing the calculated results to experimental data.

A Novel Structure Design Method Based on Knowledge Template

2012 ◽  
Vol 159 ◽  
pp. 18-22
Author(s):  
Rui Song Jiang ◽  
Xin Fa Chen ◽  
Da Yong Feng ◽  
Feng Jun Wang
Keyword(s):  
Turbine Blade ◽  
Design Process ◽  
Investment Casting ◽  
Design Method ◽  
Structure Design ◽  
Design System ◽  
Construction Methods ◽  
Novel Structure ◽  
Base Design

In this study, a novel structure design method based on knowledge template was prompted. The notion and construction methods of knowledge template were introduced. Moreover, the knowledge template based design process was represented. The knowledge templates of investment casting die bases of turbine blade were established and a design system for die base was developed. The system provides designers with a semi-automated approach for the die base design. Finally, several sample applications for investment casting die base of turbine blade were presented for demonstration.

A Cooperative-Collaborative Design System for Multi-Disciplinary Mechanical Design

2005 ◽  
Author(s):  
Zhiqiang Chen ◽  
Zahed Siddique
Keyword(s):  
Product Design ◽  
Design Process ◽  
Collaborative Design ◽  
Process Model ◽  
Mechanical Design ◽  
System Level ◽  
Design System ◽  
Design Collaboration ◽  
Design Activities ◽  
Design Process Model

The emergence of computer and network technology has provided opportunities for researchers to construct and build systems to support dynamic, real-time, and collaborative engineering design in a concurrent manner. This paper provides an understanding of the product design in a distributed environment where designers are in different geographic locations and are required to be involved in the design process to ensure successful product design. A design process model that captures the major interactions among stakeholders is presented, based on the observation of cooperation and collaboration. The stakeholders’ interactions are divided into activity and system level to distinguish the interactions in group design activities and design perspective evolution. An initial computer implementation of the design model is presented. The design system consists of a set of tools associated with design and a management system to facilitate distributed designers to support various design activities, especially conceptual design. Our research emphasis of design collaboration in this paper is: (i) Model a Cooperative-collaborative design process; (ii) Support synchronized design activities; and (iii) Structure the complex relations of various design perspectives from engineering disciplines.

Back and Forth: Using Conversation Analysis to Explore Dialogues of Sharedness of Mental Models

2020 ◽  
Author(s):  
Sue Yi ◽  
Nicole B. Damen ◽  
Christine A. Toh
Keyword(s):  
Conversation Analysis ◽  
Mental Models ◽  
Design Process ◽  
Team Performance ◽  
Future Research ◽  
Design Teams ◽  
Design Practice ◽  
Team Mental Models ◽  
Different Types ◽  
Design Activities

Abstract Shared mental models have been shown to enhance team performance. However, research has not observed the different types of sharedness of mental models that may uniquely impact the design process. Therefore, this study examines the types of sharedness of mental models that occur in design teams using Conversation Analysis on data collected from two design teams that performed activities in the early design process in a controlled lab environment. Designers were asked to develop an agreed upon list of ranked design principles, and then generate one or two solutions using the list. These design activities allow for the examination of the varying ways that designers share knowledge, negotiate, and reach understanding. Through our analysis, we identify characteristics of conversation that designers used to build shared understanding. Our results also show how team mental models are built from patterns of conversation that are evident during open-ended and unstructured design discussions. This work sets a foundation for future research to gain a deeper understanding of how designer mental models are shared in unstructured conversations that take place during design practice.

scholarly journals Computer-aided design system for control moment gyroscope

2018 ◽  
Vol 158 ◽  
pp. 01021
Author(s):  
Tamara Kostyuchenko ◽  
Nelya Indygasheva
Keyword(s):  
Design Process ◽  
Computer Aided Design ◽  
Electromechanical System ◽  
Design System ◽  
Optimal Parameters ◽  
Control Moment Gyroscope ◽  
Control Moment ◽  
Computer Aided ◽  
Aided Design ◽  
Orientation Systems

Control moment gyroscope or two-axis balking gyroscope is used in spacecraft orientation systems. The control moment gyroscope is a complex electromechanical system with different parameters which connect by means of specific instant and inverse dependences. This fact could complicate the design process as of getting the optimal parameters the search of construction variations becomes harder. To simplify the control moment gyroscope designing process and increase its efficiency the computer-aided design system could be as highly useful. The computer-aided design system which is used in the present research and described in the article consists of five main subsystems. They cover the main stages of control moment gyroscope designing.

On a New Approach to Mechanism Topology Identification

1999 ◽  
Vol 121 (1) ◽  
pp. 57-64 ◽  
Author(s):  
W. J. Zhang ◽  
Q. Li
Keyword(s):  
Mechanism Design ◽  
Design Process ◽  
New Approach ◽  
Topology Identification ◽  
Different Types ◽  
Extended Code ◽  
Abstraction Levels ◽  
Different Levels

This paper argues that different levels of mechanism topology should be considered in order to make the activity or tool of the computer comparison of mechanism topology more useful to support a whole design process of mechanisms. In this connection, four abstraction levels are identified to relate the different types of mechanism topology with reference to mechanism design tasks, processes or objectives. A new approach is developed to compare mechanism topology for all these levels. One of the ideas of this approach is to extend the existing incident degree code approach by identifying more features of mechanism topology and to define them into an extended code. This is further enhanced by an algorithm to perform permutation (without a need of exhaustive enumeration) within a group of vertices that have the same features. Examples are given to show how the approach works. Compared with some existing methods for mechanism topology identification, this approach is shown to be more effective and efficient.

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