scholarly journals DESIGN, MANUFACTURING PROCESSES AND LOAD CAPACITY OF CYLINDRICAL GEAR PAIRS WITH 2 TO 4 PINION TEETH F0R HIGH GEAR RATIO : 1st Report, Design, Manufacture and Surface Durability of the Gear Pairs with 2 to 3 Pinion Teeth

1981 ◽  
Vol 24 (198) ◽  
pp. 2210-2217 ◽  
Author(s):  
Akira ISHIBASHI ◽  
Hidehiro YOSHINO ◽  
Iwao NAKASHIMA
Keyword(s):  
Load Capacity ◽  
Gear Ratio ◽  
Manufacturing Processes ◽  
Cylindrical Gear ◽  
Surface Durability ◽  
Report Design

Experimental analysis of the automated process of sanding aircraft surfaces

2014 ◽  
Vol 118 (1199) ◽  
pp. 53-64
Author(s):  
B. Giublin ◽  
J. A. Vieira ◽  
T. G. Vieira ◽  
L. G. Trabasso ◽  
C. A. Martins
Keyword(s):  
Load Capacity ◽  
Manufacturing Processes ◽  
Robotic Cell ◽  
Research Project ◽  
Average Value ◽  
Aluminum Metal ◽  
Structural Assembly ◽  
Riveting Process ◽  
High Load Capacity ◽  
Operating Method

Abstract ITA and EMBRAER are currently executing the research project Automation of Aircraft Structural Assembly (AASA) whose goal is to implement a robotic cell for automating the riveting process of aeronautical structures. The proposal described herein complements the AASA project, adds other manufacturing processes, namely sanding and polishing of aircraft surfaces. To implement the additional processes AASA project resources and facilities were used (robots and metrology systems) and devices designed and /or acquired to allow sharing of these resources. Among these, an Automatic Tooling Support for AERonautics structures (ATS_AER) was designed and built; also, a robot tool changer with high load capacity was acquired. The outcome of this research project is the evaluation of the feasibility of automating the processes of sanding and polishing metal surfaces in the aircraft manufacture using robots. The operating method adopted for surface treatment employed the ‘U’ type trajectory optimised to be run by a KUKA robot KR 500. The sanding process has been applied to aluminum metal sheet specimen sized 2•18ft2 (0•20m2) and used commercial 600 and 800 sandpaper. The automated sanding process yielded an average value of RA 0•48 ± 0•08 which is 25% more efficient when compared to the traditional, manual process whose average value of RA is 0•75 ± 0•51.

The Use of Aluminium for Commercial Vehicle Structures—A Feasibility Study

1978 ◽  
Vol 192 (1) ◽  
pp. 81-92
Author(s):  
B. B. Hundy ◽  
S. Broadstock
Keyword(s):  
Structural Analysis ◽  
Aluminium Alloy ◽  
Feasibility Study ◽  
Commercial Vehicle ◽  
Load Capacity ◽  
Typical Case ◽  
Extra Cost ◽  
Manufacturing Processes ◽  
Structural Components

The use of aluminium alloy instead of steel for the structural components of a 32 ton articulated lorry has been examined. The probable manufacturing difficulties have been assessed and shown to be minimal. The savings in weight possible by using aluminium have been calculated from a structural analysis of the cab, tractor chassis and trailer and from this and an assessment of the manufacturing processes the extra cost of manufacturing in aluminium has been determined. A typical case study shows that this extra cost can be easily recovered by utilising the increased load capacity of the vehicle during the first few years of its life.

Expanding Research in the Field of Asymmetric Gear Design and Manufacturing

2014 ◽  
Vol 657 ◽  
pp. 504-508
Author(s):  
Sándor Ravai Nagy ◽  
Mircea Lobonţiu
Keyword(s):  
Gear Tooth ◽  
Load Capacity ◽  
Test Procedure ◽  
Medium Size ◽  
Accuracy Class ◽  
Cylindrical Gear ◽  
Gear Manufacturing ◽  
Control Technologies ◽  
Manufacturing Technologies ◽  
And Control

<span><p align="LEFT"></p> <p><span style="font-size: medium;" size="3">Studies and research in the field of cylindrical gear transmission capacity have identified gears with asymmetric teeth as a suitable solution. In addition to sizing problems of the gears with asymmetric teeth, there is a strong need of their manufacturing solutions, which requires adaptation of the existing gear manufacturing and control technologies. Following the application of the test procedure for the first batch of teeth set in advance, an 11-27% increased load capacity of the gear tooth resulted, which led to a similar increase of the maximum torque transmitted by the gearing. By studying and trying the manufacturing technologies of the gears, we made gears with asymmetric teeth with finished flanks by grinding in accuracy class 5-6. And we use these gears to make a one-stage gearbox, for further research.</span></p>

Gear Transmission Density Maximization

2011 ◽  
Author(s):  
Alexander L. Kapelevich ◽  
Viacheslav M. Ananiev
Keyword(s):  
Gear Tooth ◽  
Load Capacity ◽  
Gear Ratio ◽  
Gear Transmission ◽  
Gear Trains ◽  
Reduced Costs ◽  
Gear Drives ◽  
Internal Gear ◽  
Ratio Optimization ◽  
Volume Functions

Maximization of the gear transmission density presents an important task. It allows to increase the output torque within given dimensional constrains that is critical, for instance, in racing gearboxes, or to reduce size and weight of aerospace gear drives. It can also lead to reduced costs for automotive and consumer product gear trains, etc. There are several ways to increase gear drive load capacity, including advanced design, materials, and technologies. This paper presents an approach that allows optimizing gearbox kinematic arrangement and gear tooth geometry to achieve high gear transmission density. It introduces dimensionless gearbox volume functions, which can be minimized by the internal gear ratio optimization. Different gearbox arrangements are analyzed to define a minimum of the volume functions. Application of the asymmetric gear tooth profiles power density maximization is also considered.

scholarly journals Study of geometric characteristics of the arc teeth semi-rolled cylindrical gear meshing

2021 ◽  
Vol 49 (2) ◽  
pp. 367-373
Author(s):  
Vladimir Syzrantsev ◽  
Ksenia Syzrantseva
Keyword(s):  
Mathematical Models ◽  
Relative Position ◽  
Load Capacity ◽  
Twist Angle ◽  
Body Parts ◽  
Forming Process ◽  
Cylindrical Gear ◽  
Geometric Characteristics ◽  
Cylindrical Gears ◽  
Large Gear

In the conditions of unbraced machine body parts, arc teeth cylindrical gears have a higher load capacity, durability and reliability as well as the ability to compensate for the twist angle by self-adjustment of one of the wheels compared to straight and helical teeth gears. Use of such gears in a semi-rolled version allows simplifying significantly the technological process of cutting wheels and making gears with large gear ratios. In this article, mathematical models of wheel and gear arc teeth forming process are built for a semi-rolled cylindrical gear. The geometric characteristics of the gear arc teeth meshing in the presence of errors in the wheel and gear relative position, required to solve the problem of calculating the gear load capacity and durability, have been determined.

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