scholarly journals Research on innovative design of a new rope knotter

2019 ◽  
Vol 11 (9) ◽  
pp. 168781401987832
Author(s):  
Yanmei Meng ◽  
Hao Chen ◽  
Yuan Liang ◽  
Johnny Qin ◽  
Qinchuan Zhao ◽  
...  
Keyword(s):  
Dynamic Analysis ◽  
Success Rate ◽  
Manufacturing Process ◽  
Complex Structure ◽  
Large Angle ◽  
Innovative Design ◽  
Design And Manufacturing ◽  
Physical Tests ◽  
Gear Mechanism ◽  
Cycle Diagram

Aiming at the complex structure and high manufacturing process requirements of traditional knotter, this article proposes a new rope knotting method. Based on the knotting method, a knotter is designed to use a new mechanism which is made up of two new incomplete gear mechanisms to drive rope clamping mechanism and rope hooking and griping mechanism. First, a kinematic cycle diagram of the knotter is determined, and the structures of each key mechanism are designed. Then, a virtual prototype of the knotter is established by Unigraphics and imported into Automated Dynamic Analysis of Mechanical Systems to analyze the kinematic of each key mechanism. The success rate is 98.4% through 500 physical tests on the physical model of the knotter. The results indicate that the knotting method is reliable. The knotter can meet the requirements of structure, posture, and coordination during knotting process. The new knotter has no separate mechanism for cutting rope and tripping out of the rope buckle. Therefore, the structure is simplified and reduces the design and manufacturing difficulties. Furthermore, the new incomplete gear mechanism solves the problem that in the conventional incomplete gear mechanism, the driven gear can swing at a large angle or even cannot be locked in the case when the locking arc of the passive gear is too short.

DESIGN AND MANUFACTURING PROCESS OF A UAV COMPOSITE WING SPAR

2018 ◽  
Author(s):  
Pablo M. N. Araujo ◽  
Thiago R. Costa ◽  
Eduardo C. Silva
Keyword(s):  
Manufacturing Process ◽  
Design And Manufacturing ◽  
Wing Spar ◽  
Composite Wing

Dynamic analysis of a motor-gear-mechanism system

1991 ◽  
Vol 26 (3) ◽  
pp. 239-252 ◽  
Author(s):  
F.W Liou ◽  
Arthur G Erdman ◽  
C.S Lin
Keyword(s):  
Dynamic Analysis ◽  
Gear Mechanism

The Bus Factor in Conceptual System Design: Protecting a Design Process Against Major Regional and World Events

2021 ◽  
Author(s):  
Douglas L. Van Bossuyt ◽  
Ryan M. Arlitt
Keyword(s):  
System Design ◽  
Design Process ◽  
Manufacturing Process ◽  
Storage System ◽  
Disease Outbreaks ◽  
Industrial Sector ◽  
Conceptual System ◽  
Design And Manufacturing ◽  
Renewable Energy Generation ◽  
Virtual Events

Abstract We introduce a method to help protect against and mitigate possible consequences of major regional and global events that can disrupt a system design and manufacturing process. The method is intended to be used during the conceptual phase of system design when functional models have been developed and component solutions are being chosen. Disruptive events such as plane crashes killing many engineers from one company traveling together, disease outbreaks killing or temporarily disabling many people associated with one industrial sector who travel to the same conference regularly, geopolitical events that impose tariffs or complete cessation of trade with a country that supplies a critical component, and many other similar physical and virtual events can significantly delay or disrupt a system design process. By comparing alternative embodiment, component, and low-level functional solutions, solutions can be identified that better pass the bus factor where no one disruptive event will cause a major delay or disruption to a system design and manufacturing process. We present a simplified case study of a renewable energy generation and storage system intended for residential use to demonstrate the method. While some challenges to immediate adoption by practitioners exist, we believe the method has the potential to significantly improve system design processes so that systems are designed, manufactured, and delivered on schedule and on budget from the perspective of significant disruptive events to design and manufacturing.

scholarly journals Surgical outcomes of acute acquired comitant esotropia of adulthood

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Dae Hyun Kim ◽  
Ha Jeong Noh
Keyword(s):  
Success Rate ◽  
Surgical Outcomes ◽  
Medical Records ◽  
Large Angle ◽  
Sudden Onset ◽  
Prism Diopter ◽  
Factors Affecting ◽  
The Mean ◽  
Motor Outcomes

Abstract Background Acute acquired comitant esotropia (AACE) is a type of strabismus characterized by a sudden onset of large angle esotropia with diplopia, which often occurs in children after infancy, teenagers, and young adolescents. However, studies on the surgical outcomes of only adults are rare. The purpose of this article is to analyze the surgical outcomes for adult patients diagnosed with AACE. Methods Medical records of 24 patients who had undergone surgery for AACE were retrospectively analyzed. The main outcome measures were the final motor and sensory success rate after surgery and factors affecting motor and sensory outcomes. Motor success was considered alignment within 8 prism diopter (PD) at both near and distance and sensory success was stereoacuity ≥ 60 sec/arc. Results The preoperative mean esodeviation angles were 33.1 ± 10.4 PD at distance and 33.3 ± 11.2 PD at near. The mean period of postoperative follow up was 7.5 ± 4.5 months (range 1–8 months). The postoperative mean esodeviation angles at final follow-up time were 3.4 ± 6.1 PD at distance and 3.8 ± 6.7 PD at near. The surgical motor success rate at final follow-up was 79.2% (19/24). The sensory success rate at final follow-up was 50.0% (12/24). The factor affecting the motor outcome was the type of surgery (p < 0.05). The factor affecting sensory outcome was postoperative follow-up time (p < 0.05). Conclusions Surgery type appears to affect surgical motor outcomes in adults with AACE. Although the sensory outcome was favorable, it seems that regaining bifoveal fixation takes time.

Innovative Design of the Wind-Driven Efficient Feeding Mechanism

2013 ◽  
Vol 274 ◽  
pp. 290-293
Author(s):  
Bao Gang Wang ◽  
Qi Hui Song ◽  
Guang Chi Xu
Keyword(s):  
Energy Conversion ◽  
High Efficiency ◽  
Transmission Mechanism ◽  
Linkage Mechanism ◽  
Innovative Design ◽  
Feeding Mechanism ◽  
Gear Mechanism ◽  
Actual Operation ◽  
The Common ◽  
Material Transportation

A wind-driven feeding mechanism of high efficiency is designed according to the TRIZ theory and its mechanical structure innovative design based on the principle of energy conversion. It aims at delivering of small granular, cylindrical, flakes and other materials in machinery, pharmaceuticals, electronics and other industries by transmission mechanism such as the typical gear mechanism and linkage mechanism. The prototype is produced combined with the specific parameters of the common materials. The modular innovative design is adopted, including the transmission module, driver module and material feeding module. By the inspection of the actual operation, each design module of the produced prototype is stable and reliable. At the same time the effect of material transportation is good.

Robust Tolerance Design Considering Process Capability and Quality Loss

1999 ◽  
Author(s):  
Chang-Xue (Jack) Feng ◽  
Ravi Balusu
Keyword(s):  
Manufacturing Process ◽  
Lead Time ◽  
Process Capability ◽  
Concurrent Design ◽  
Manufacturing Cost ◽  
Tolerance Design ◽  
Quality Loss ◽  
Quality Loss Function ◽  
Capability Indices ◽  
Design And Manufacturing

Abstract Tolerance design bridges design and manufacturing. Concurrent design of tolerances and manufacturing processes may ensure the manufacturability, reduce the manufacturing and other related costs, decrease the number of fraction nonconforming (or defective rate), and shorten the production lead time. Since process capability indices relate tolerance specifications to manufacturing process capabilities, it is quite natural to apply them to concurrent design of tolerances and processes. As process shifts often exist in a manufacturing process, using Cp does not yield a good estimation of fraction nonconforming. Index Cpk does not precisely measure process shift either, but Cpm does. Therefore, this research compares the applications of Cp, Cpk and Cpm based on a numerical example of non-linear mechanical tolerance synthesis. In addition, the Taguchi quality loss function is used together with the manufacturing cost as the objective function.

scholarly journals Automotive leaf spring design and manufacturing process improvement using failure mode and effects analysis (FMEA)

2020 ◽  
Vol 12 ◽  
pp. 184797902094243
Author(s):  
Tauseef Aized ◽  
Muhammad Ahmad ◽  
Muhammad Haris Jamal ◽  
Asif Mahmood ◽  
Syed Ubaid ur Rehman ◽  
...  
Keyword(s):  
Failure Mode ◽  
Process Improvement ◽  
Manufacturing Process ◽  
Structural Member ◽  
Leaf Spring ◽  
Risk Priority Number ◽  
Human Safety ◽  
Leaf Springs ◽  
Design And Manufacturing ◽  
Quality And Reliability

Nowadays human safety and comfort are the most considerable parameters in designing and manufacturing of a vehicle, that is why every organization ensures the quality and reliability of components used in the vehicle. Leaf spring is also a component of vehicle which plays an important role in human safety and comfort. It acts as a structural member and an integral part of suspension system. It is important to eliminate the failures in designing and manufacturing process of leaf springs because of its importance in functionality and safety of vehicle. In this research, failure mode and effects analysis has been used to analyze and reduce the risks of 42 possible failures that can occur in automotive leaf spring. It starts from determining, classifying, and analyzing all potential failures and then rating them with the help numeric scores. The four numeric scores namely severity, occurrence, detection, and Risk Priority Number (RPN) are used to find the high potential failures of semi-elliptical leaf springs. In the end, actions are recommended for RPN greater than 250, to increase quality and reliably of product.

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