A universal virtual manufacturing system for cutting machines

2010 ◽  
Author(s):  
Wenlei Xiao ◽  
Yanqiang Liu ◽  
K. Loeis
Keyword(s):  
Manufacturing System ◽  
Virtual Manufacturing

Research on a Generating Method of Spiral Flutes of Hourglass Worm Gear Hob

2017 ◽  
Author(s):  
Yang Jie ◽  
Li Haitao ◽  
Rui Chengjie ◽  
Wei Wenjun ◽  
Dong Xuezhu
Keyword(s):  
Mathematical Model ◽  
Manufacturing System ◽  
Worm Gear ◽  
Virtual Manufacturing ◽  
Transmission Ratio ◽  
Method Of Determination ◽  
Generating Method ◽  
Multiple Threads ◽  
Different Shapes

All of the cutting edges on an hourglass worm gear hob have different shapes and spiral angles. If the spiral angles are small, straight flutes are usually adopted. But for the hob with multiple threads, the absolute values of the negative rake angles at one side of the cutting teeth will greatly affect the cutting performance of the hob if straight flutes are still used. Therefore, spiral flutes are usually adopted to solve the problem. However, no method of determination of the spiral flute of the hourglass worm gear hob has been put forward till now. Based on the curved surface generating theory and the hourglass worm forming principle, a generating method for the spiral flute of the planar double enveloping worm gear hob is put forward in this paper. A mathematical model is built to generate the spiral flute. The rake angles of all cutting teeth of the hob are calculated. The laws of the rake angles of the cutting teeth of four hobs with different threads from one to four threads are analyzed when straight flutes and spiral flutes are adopted respectively. The laws between the value of the negative rake angles of the hob with four threads and the milling transmission ratio are studied. The most appropriate milling transmission ratio for generating the spiral flute is obtained. The machining of the spiral flutes is simulated by a virtual manufacturing system and the results verify the correctness of the method.

A networked virtual manufacturing system for SMEs

2007 ◽  
Vol 20 (1) ◽  
pp. 71-79 ◽  
Author(s):  
Q. Peng ◽  
C. Chung ◽  
C. Yu ◽  
T. Luan
Keyword(s):  
Manufacturing System ◽  
Virtual Manufacturing

Virtual manufacturing system

2002 ◽  
Author(s):  
H. Koriyama ◽  
Y. Yazaki ◽  
I. Honbori ◽  
Y. Kato ◽  
T. Kisakibaru
Keyword(s):  
Manufacturing System ◽  
Virtual Manufacturing

Batch Splitting Activity in Scheduling of Virtual Cell with Capacity Constraints Based on Bi-Level Mathematical Model

2012 ◽  
Vol 263-266 ◽  
pp. 1257-1264 ◽  
Author(s):  
Wen Min Han ◽  
Juan Chen ◽  
Xiang Zun Bu
Keyword(s):  
Mathematical Model ◽  
Manufacturing System ◽  
Virtual Manufacturing ◽  
Virtual Cell ◽  
Virtual Cells ◽  
Lot Splitting ◽  
Hierarchical Decision ◽  
Decision Structure ◽  
Splitting Problem ◽  
Bottleneck Machine

Although there has been some researches about virtual cell manufacturing system, the existing literature lack of discussion about the scheduling model that considering with bottleneck machines in the virtual cells. In view of this deficiency and the new characteristics of the batch splitting problem, this paper considered the batch splitting (or lot splitting) problem in scheduling of virtual manufacturing cells with bottlenecks and multiple machine types, and each of which has several identical machines. In consideration of the hierarchical decision structure of the problem, we developed a bi-level multi-objective mathematical model. Scheduling results and batch splitting strategies of both bottleneck and non-bottleneck machines are given in separate decision levels and additional scheduling objectives are improved in the second model level, while maintaining the maximum use of the bottleneck machine ability. In order to demonstrate how this approach works, application example was shown in this paper.

Development and Application of Virtual Manufacturing Technology

2013 ◽  
Vol 765-767 ◽  
pp. 151-155 ◽  
Author(s):  
Xiao Jing Li ◽  
Cheng Si Li
Keyword(s):  
Manufacturing System ◽  
Research Work ◽  
Virtual Manufacturing ◽  
Machining Process ◽  
Tool Magazine ◽  
Advanced Machining ◽  
Definition Of ◽  
And Control ◽  
Five Axis

As an advanced machining technology, virtual manufacturing has been regarded as an useful tool to carry out analysis and research work with digital model instead of practical manufacture. For the virtual manufacturing process, it is a mapping of the practical machining in computer virtual environment, no real production is created and without material or power wasting. Several typical definition of virtual manufacturing dominate in this fields were listed out, based on which expressed an explicit interpretation. Main features and three type of virtual manufacturing, such as design-centered, machine-centered and control centered virtual manufacturing were analysed respectively. The virtual manufacturing system, supported by cutter tool magazine, pallet storage, production database, material storage and NC storage, have been demonstrated in an architecture figure. Finally, the author concluded the important role of virtual manufacturing and illustrated an example of applying virtual manufacturing in five-axis machining process.

scholarly journals Toward digital validation for rapid product development based on digital twin: a framework

2022 ◽  
Author(s):  
Sihan Huang ◽  
Guoxin Wang ◽  
Dong Lei ◽  
Yan Yan
Keyword(s):  
Product Development ◽  
Manufacturing System ◽  
New Product ◽  
Virtual Manufacturing ◽  
Virtual Space ◽  
Smart Manufacturing ◽  
Digital Twin ◽  
Design Scheme ◽  
Rapid Product Development ◽  
Digital Prototype

AbstractProduct development should cover product design, validation, and manufacturing. In traditional product development, physical validation based on physical trial manufacturing is the key step to confirm the design scheme before physical manufacturing. However, physical validation is costly and inefficient, which could be the main obstacle to achieving rapid product development. The emergence of digital twin provides an opportunity to accelerate product development by eliminating physical validation toward digital validation in the smart manufacturing era. Therefore, a framework of rapid product development based on digital twin is proposed in this paper. During product development, the new product is designed according to the new requirements in the virtual space, in which the existing digital twins of products can be referenced. Then, an ultrahigh-fidelity virtual manufacturing system is constructed for digital trial manufacturing based on the digital twin of the manufacturing system and the design scheme of the new product. An ultrahigh-fidelity digital prototype can be obtained from digital trial manufacturing for digital validation. The new product validation is executed on the digital prototype to test its performance. The digital validation results can be used to improve the design scheme of the new product and boost the corresponding manufacturing processes. In addition, the core characteristics and key technologies of rapid product development based on digital twin are discussed. Finally, a case study is presented to implement the proposed framework and to show the effectiveness of accelerating product development.

A Method to Generate the Spiral Flutes of an Hourglass Worm Gear Hob

2018 ◽  
Vol 140 (6) ◽  
Author(s):  
Jie Yang ◽  
Haitao Li ◽  
Chengjie Rui ◽  
Wenjun Wei ◽  
Xuezhu Dong
Keyword(s):  
Mathematical Model ◽  
Manufacturing System ◽  
Worm Gear ◽  
Virtual Manufacturing ◽  
Cutting Performance ◽  
Curved Surface ◽  
Transmission Ratio ◽  
Multiple Threads ◽  
Different Shapes ◽  
The Absolute

All of the cutting edges on an hourglass worm gear hob have different shapes and spiral angles. If the spiral angles are small, straight flutes are typically adopted. However, for hobs with multiple threads, the absolute values of the negative rake angles on one side of the cutting teeth will greatly affect the cutting performance of the hob if straight flutes are still used. Therefore, spiral flutes are typically adopted to solve this problem. However, no method to determine the spiral flute of an hourglass worm gear hob has been proposed until now. Based on the curved surface generating theory and the hourglass worm forming principle, a method for generating the spiral flute of the planar double enveloping hourglass worm gear hob is proposed in this paper. A mathematical model was built to generate the spiral flute. The rake angles of all cutting teeth of the hob are calculated. The laws of the rake angles of the cutting teeth for four hobs with different threads from one to four threads were analyzed when straight flutes and spiral flutes are adopted. The laws between the value of the negative rake angles of the hob with four threads and the transmission ratio were studied. The most appropriate transmission ratio for generating the spiral flute was obtained. The machining of the spiral flutes was simulated using a virtual manufacturing system, and the results verify the correctness of the method.

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