Precise Die Face Design of Drawing Dies for Stamping Process Based on Point Cloud

2014 ◽  
Vol 490-491 ◽  
pp. 302-305
Author(s):  
Qiang Yu
Keyword(s):  
Automobile Industry ◽  
Point Cloud ◽  
Design Method ◽  
Low Cost ◽  
Accurate Method ◽  
Automobile Manufacturing ◽  
Die Structure ◽  
Trial And Error Method ◽  
Drawing Dies ◽  
Error Method

Low cost, short cycle and high quality are the goals of the automobile manufacturing. The auto die is one of the key equipments in automobile industry. For the die manufacturing process is very complicated the trial-and-error method is still used in the tryout process especially the die face tryout. The computer aided engineering becomes more and more important for the new die development. In this paper the precise die face design process based on the blank drawing and die structure simulation for automobile die is studied in detail. The precise die face is generated by the cloud of simulation nodes distribution. The industrial application shows that the precise die face design method based on point cloud generation for automobile die is an efficient way for decreasing the die manufacturing cycle and an accurate method for die tryout process.

A compliance modeling method of flexible rotary joint for collaborative robot using passive network synthesis theory

2021 ◽  
pp. 095440622110471
Author(s):  
Shoulin Xu ◽  
Bin He
Keyword(s):  
Design Method ◽  
Previous Method ◽  
Network Synthesis ◽  
Rotary Joint ◽  
Compliance Modeling ◽  
Passive Network ◽  
Modeling Theory ◽  
Trial And Error Method ◽  
Collaborative Robot ◽  
Error Method

Collaborative robots have become a research focus because of their wide applications. However, the previous compliance design method of the flexible rotary joint for collaborative robot mainly relied on experience of designers, and “trial and error” method is usually adopted, no feasible and systematic theory for the designer to select numerical value and series-parallel connection mode of the springs and dampers for the flexible rotary joint. Thus, developing a feasible compliance modeling theory to guide the design of the flexible rotary joint is a particularly challenging task. The main contribution of this paper is to present a novel and effective compliance modeling theory of the flexible rotary joint for collaborative robot based on electrical and mechanical passive network synthesis, to provide theoretical and systematic guidances for compliance design of the flexible rotary joint. First, inerter element is introduced into the mechanical system, and the compliance of the flexible rotary joint is expressed as an angular velocity admittance function using electrical and mechanical network analogy. Then, by passive network synthesis theory, the three kinds of compliance realization forms of rational function and four-element compliance realization conditions of biquadratic function for the flexible rotary joint are given using inerters, springs, and dampers. Moreover, numerical examples and simulations are conducted to illustrate effectiveness of the proposed compliance realization method. Finally, discussions are given to illustrate advantages of the proposed compliance modeling and design methods compared with the previous method.

Dynamic Design Method for Magnesium Alloys Wheel of New Energy Vehicles

2010 ◽  
Vol 118-120 ◽  
pp. 930-934
Author(s):  
Wei Hua Zhu ◽  
Zuan Xi Zheng ◽  
Jin Zhi Feng ◽  
Hong Hui Xu ◽  
You Tao Wang ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Magnesium Alloys ◽  
Automobile Industry ◽  
Design Method ◽  
Low Cost ◽  
Noise Emission ◽  
Dynamic Design ◽  
Braking Performance ◽  
Structural Applications ◽  
New Energy

This paper tends to find ways to replace aluminum alloy with a new kind of magnesium alloy for vehicle hubs, and also implements a dynamic design method for the hubs' weight-optimization and relevant analysis，so as to evaluate the strength reliability and modal characteristics. In comparison with most widely used aluminum alloys, magnesium alloy is one of the lightest commercialized metallic materials for structural applications. Magnesium alloys possess the attractive properties desired by automobile industry, such as low density, low cost, higher strength and out-standing damping capability. When used as wheel material, Mg alloys are able to reduce mass of the wheels, absorb vibration, damp noise emission, reduce fuel consumption and enhance acceleration and braking performance.

The Optimization Design of a Heavy Truck Leaf Spring

2014 ◽  
Vol 644-650 ◽  
pp. 463-466
Author(s):  
Yao Ye ◽  
Feng Wang
Keyword(s):  
Optimization Design ◽  
Design Method ◽  
Optimal Solution ◽  
Leaf Spring ◽  
Traditional Design ◽  
Practical Engineering ◽  
Strength Material ◽  
Heavy Truck ◽  
Trial And Error Method ◽  
Error Method

The traditional design method of heavy truck leaf spring is always the trial-and-error method. In addressing the problem of being multi-objective, the weakness is that there is a large amount of calculation and it is difficult to find the most optimal solution. The leaf spring of the sinotruck ZZ4256N324MD1B is taken as the research object. With the constraint conditions of the spring's overall layout, stiffness, strength, material, size, and the requirements of the manufacturing process, the optimization design model is established. We follow the method of particle swarm optimization algorithm to get the more optimization design on the leaf spring. The calculation of design example shows that the method this article uses of optimization to solve practical engineering problems with complicated constraints is very effective.

The Full Flow of Precise Die Face Design Process for Automobile Die

2012 ◽  
Vol 152-154 ◽  
pp. 1427-1430
Author(s):  
Chang Feng Men ◽  
Qiang Yu
Keyword(s):  
Design Process ◽  
Automobile Industry ◽  
Trial And Error ◽  
Surface Design ◽  
Initial Information ◽  
Drawing Die ◽  
Die Surface ◽  
Trial And Error Method ◽  
Thinning Rate ◽  
Error Method

The die manufacturing is very important for the automobile industry. For the die manufacturing process is very complicated the trial-and-error method is still used. In this paper the full flow of precise die face design process for automobile die is studied in detailed. First the primary drawing die face layout is explained. And the initial information for blank formability simulation and primary die surface design is summarized. For the precise die face design process the blank thinning rate and die deformation are studied according to the two simulation results combined. The industrial application shows that the full flow of precise die face design process for automobile die is a good way for decrease the die manufacturing cycle.

CONTEXTUAL SUBTEXT INFORMATION OF A FOREIGN LANGUAGE TEXT: HERMENEUTIC APPROACH

2020 ◽  
Vol 2020 (30) ◽  
pp. 75-87
Author(s):  
Lidiya Derbenyova
Keyword(s):  
Foreign Language ◽  
Optimal Solution ◽  
Decision Making Process ◽  
Trial And Error ◽  
Transmission Of Information ◽  
Hermeneutic Approach ◽  
Trial And Error Method ◽  
Problems Of Translation ◽  
Error Method ◽  
Language Text

The article focuses on the problems of translation in the field of hermeneutics, understood as a methodology in the activity of an interpreter, the doctrine of the interpretation of texts, as a component of the transmission of information in a communicative aspect. The relevance of the study is caused by the special attention of modern linguistics to the under-researched issues of hermeneutics related to the problems of transmission of foreign language text semantics in translation. The process of translation in the aspect of hermeneutics is regarded as the optimum search and decision-making process, which corresponds to a specific set of functional criteria of translation, which can take many divergent forms. The translator carries out a number of specific translation activities: the choice of linguistic means and means of expression in the translation language, replacement and compensation of nonequivalent units. The search for the optimal solution itself is carried out using the “trial and error” method. The translator always acts as an interpreter. Within the boundaries of a individual utterance, it must be mentally reconstructed as conceptual situations, the mentally linguistic actions of the author, which are verbalized in this text.

scholarly journals Research on Blank Optimization Design Based on Low-Carbon and Low-Cost Blank Process Route Optimization Model

2021 ◽  
Vol 13 (4) ◽  
pp. 1929
Author(s):  
Yongmao Xiao ◽  
Wei Yan ◽  
Ruping Wang ◽  
Zhigang Jiang ◽  
Ying Liu
Keyword(s):  
Optimization Model ◽  
Optimization Design ◽  
Design Method ◽  
Low Cost ◽  
Route Optimization ◽  
Low Carbon ◽  
Multi Objective Optimization ◽  
Multi Objective ◽  
Blank Design ◽  
Process Route

The optimization of blank design is the key to the implementation of a green innovation strategy. The process of blank design determines more than 80% of resource consumption and environmental emissions during the blank processing. Unfortunately, the traditional blank design method based on function and quality is not suitable for today’s sustainable development concept. In order to solve this problem, a research method of blank design optimization based on a low-carbon and low-cost process route optimization is proposed. Aiming at the processing characteristics of complex box type blank parts, the concept of the workstep element is proposed to represent the characteristics of machining parts, a low-carbon and low-cost multi-objective optimization model is established, and relevant constraints are set up. In addition, an intelligent generation algorithm of a working step chain is proposed, and combined with a particle swarm optimization algorithm to solve the optimization model. Finally, the feasibility and practicability of the method are verified by taking the processing of the blank of an emulsion box as an example. The data comparison shows that the comprehensive performance of the low-carbon and low-cost multi-objective optimization is the best, which meets the requirements of low-carbon processing, low-cost, and sustainable production.

scholarly journals Advanced Graphical–Analytical Method of Pipe Tank Design Integrated with Sensitivity Analysis for Sustainable Stormwater Management in Urbanized Catchments

Water ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1035
Author(s):  
Bartosz Szeląg ◽  
Adam Kiczko ◽  
Anna Musz-Pomorska ◽  
Marcin K. Widomski ◽  
Jacek Zaburko ◽  
...  
Keyword(s):  
Sensitivity Analysis ◽  
Analytical Method ◽  
Design Method ◽  
Accurate Method ◽  
Urban Catchment ◽  
Storm Water Management Model ◽  
Catchment Areas ◽  
Calculation Methodology ◽  
Tank Design ◽  
Spatial Plan

Pipe tanks represent important runoff retention elements of urban stormwater systems. They enable us to reduce and retain runoff as well as to mitigate peak flows in the network. Pipe tanks are often taken into account while designing the spatial plan of urban catchment areas. Hence, there is a need to develop a relatively quick and accurate method for pipe tank dimensioning. A graphical–analytical method of designing a pipe tank is presented in the paper. In the assumed methodology, the possibility of employing machine learning for obtaining a more precise error prediction of the proposed pipe tank design method (compared with the tank volume simulations using the storm water management model (SWMM)) are considered. Thus far, this aspect has not been discussed in the literature. In the adopted calculation methodology, sensitivity analysis constitutes an important element, enabling us to assess the influence of the input data assumed for tank design on the dimensions of the outflow devices and the length of the retention chamber.

scholarly journals Low-Cost Calibration of Matching Error between Lidar and Motor for a Rotating 2D Lidar

2021 ◽  
Vol 11 (3) ◽  
pp. 913
Author(s):  
Chang Yuan ◽  
Shusheng Bi ◽  
Jun Cheng ◽  
Dongsheng Yang ◽  
Wei Wang
Keyword(s):  
Point Cloud ◽  
Low Cost ◽  
Shape Error ◽  
3D Point Cloud ◽  
Motor Shaft ◽  
Matching Error ◽  
Triangular Plate ◽  
Attitude Error ◽  
Shaft Angle ◽  
The Cost

For a rotating 2D lidar, the inaccurate matching between the 2D lidar and the motor is an important error resource of the 3D point cloud, where the error is shown both in shape and attitude. Existing methods need to measure the angle position of the motor shaft in real time to synchronize the 2D lidar data and the motor shaft angle. However, the sensor used for measurement is usually expensive, which can increase the cost. Therefore, we propose a low-cost method to calibrate the matching error between the 2D lidar and the motor, without using an angular sensor. First, the sequence between the motor and the 2D lidar is optimized to eliminate the shape error of the 3D point cloud. Next, we eliminate the attitude error with uncertainty of the 3D point cloud by installing a triangular plate on the prototype. Finally, the Levenberg–Marquardt method is used to calibrate the installation error of the triangular plate. Experiments verified that the accuracy of our method can meet the requirements of the 3D mapping of indoor autonomous mobile robots. While we use a 2D lidar Hokuyo UST-10LX with an accuracy of ±40 mm in our prototype, we can limit the mapping error within ±50 mm when the distance is no more than 2.2996 m for a 1 s scan (mode 1), and we can limit the mapping error within ±50 mm at the measuring range 10 m for a 16 s scan (mode 7). Our method can reduce the cost while the accuracy is ensured, which can make a rotating 2D lidar cheaper.

The determination of units in totally real cubic fields

1960 ◽  
Vol 56 (4) ◽  
pp. 318-321 ◽  
Author(s):  
H. J. Godwin
Keyword(s):  
Trial And Error ◽  
Integral Lattice ◽  
Cubic Field ◽  
Cubic Fields ◽  
Trial And Error Method ◽  
Totally Real ◽  
Rational Integral ◽  
Fundamental Units ◽  
Error Method

The determination of a pair of fundamental units in a totally real cubic field involves two operations—finding a pair of independent units (i.e. such that neither is a power of the other) and from these a pair of fundamental units (i.e. a pair ε1; ε2 such that every unit of the field is of the form with rational integral m, n). The first operation may be accomplished by exploring regions of the integral lattice in which two conjugates are small or else by factorizing small primes and comparing different factorizations—a trial-and-error method, but often a quick one. The second operation is accomplished by obtaining inequalities which must be satisfied by a fundamental unit and its conjugates and finding whether or not a unit exists satisfying these inequalities. Recently Billevitch ((1), (2)) has given a method, of the nature of an extension of the first method mentioned above, which involves less work on the second operation but no less on the first.

scholarly journals Co-Design of CVT-Based Electric Vehicles

Energies ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1825
Author(s):  
Caiyang Wei ◽  
Theo Hofman ◽  
Esin Ilhan Caarls
Keyword(s):  
Cooling System ◽  
Design Method ◽  
Low Cost ◽  
Cost Effective ◽  
Speed Ratio ◽  
Air Flow Rate ◽  
Cost Of Ownership ◽  
Variable Transmission ◽  
Primary Focus ◽  
Design Freedom

For an electric vehicle (EV) with a continuously variable transmission (CVT), a novel convex programming (CP)-based co-design method is proposed to minimize the total-cost-of-ownership (TCO). The integration of the electric machine (EM) and the CVT is the primary focus. The optimized system with co-design reduces the TCO by around 5.9% compared to a non-optimized CVT-based EV (based on off-the-shelf components) and by around 2% compared to the EV equipped with a single-speed transmission (SST). By taking advantage of the control and design freedom provided by the CVT, the optimal CVT, EM and battery sizes are found to reduce the system cost. It simultaneously finds the optimal CVT speed ratio and air-flow rate of the cooling system reducing the energy consumption. The strength of co-design is highlighted by comparing to a sequential design, and insights into the design of a low-power EV that is energy-efficient and cost-effective for urban driving are provided. A highly integrated EM-CVT system, which is efficient, low-cost and lightweight, can be expected for future EV applications.

Sign in / Sign up

Export Citation Format

Share Document