scholarly journals Quality assurance on the example of the welding process for gear lever

2018 ◽  
Vol 19 (9) ◽  
pp. 219-224
Author(s):  
Stanisław Pałubicki
Keyword(s):  
Quality Assurance ◽  
Continuous Improvement ◽  
Automotive Industry ◽  
Welding Process ◽  
Product Selection ◽  
Production Processes ◽  
The Stability ◽  
Gear Lever ◽  
Manufacturing Stage

Quality is one of the basics of product selection by customers. Therefore, the main area of quality management is the identification of customers, their requirements and expectations. This is especially important in the automotive industry. Today's enterprises, wanting to strengthen their market position by improving the quality of their products, constantly control their products. Systems responsible for monitoring production allow to ensure the course of production processes in supervised conditions. The monitoring and recording of events that occur during production is of key importance. This is the basis for analyzing the stability of the production process, which is a key aspect of continuous improvement of quality. Thanks to this approach, it is possible to prevent the generation of costs related to the removal of defective products created at the manufacturing stage, as well as to reduce the number of complaints.

scholarly journals Making it in the Competitive World

1998 ◽  
Vol 120 (05) ◽  
pp. 72-75
Author(s):  
Dan Koenig
Keyword(s):  
Quality Assurance ◽  
Quality Management ◽  
Total Quality Management ◽  
Continuous Improvement ◽  
Raw Materials ◽  
Value Added ◽  
Total Quality ◽  
Factory Production ◽  
Production Processes ◽  
Product Specifications

This article explains a logical, seven-step approach that helps to solve problems of on-time product and service delivery with profit. The first step is to obtain product specifications. The next step is to design a method for producing the product, including the design and purchase of equipment and production processes, if required. Scheduling for production is the coordination step; if not done well, it will spell doom for the company. Coordination is the key to purchasing raw materials in accordance with the schedule. Next is the transformation phase of raw materials to finished product—actual factory production—which is commonly called the value-added step. The quality assurance phase of monitoring results for technical compliance and cost control is an ongoing process of constant vigilance and continuous improvement. This step seeks to ensure that the product or service is being provided in accordance with the plan, a plan that includes technical, schedule, and cost goals. The best companies use total quality management (TQM), whereby improvement is continuous, as exemplified symbolically by the TQM triangle.

scholarly journals The Applicability of the First Stage of 5S Methodology to Improve the Quality of Processes in Military Organizations

2019 ◽  
Vol 25 (1) ◽  
pp. 261-266
Author(s):  
Nicolae Moro ◽  
Florin Ilie
Keyword(s):  
Service Delivery ◽  
Customer Service ◽  
Continuous Improvement ◽  
Application Area ◽  
Military Organizations ◽  
Production Processes ◽  
Material Goods ◽  
Solid Foundation ◽  
Primary Focus

Abstract The paper addresses the first step of the 5S methodology, a widespread methodology in organizations that has as its primary focus the continuous improvement of the quality of material goods production processes or customer service delivery. This methodology has a very good application area within the defence system because this field is essentially based on a very strong organizational culture with a number of specific rigor and standards that contribute to the implementation of the five concrete stages of this methodology. In a synthetic analysis of these types of organizations, it is obvious that these activities necessary for the application of this useful tool for the organization of jobs have a solid foundation but it should be restructured according to the criteria set out in the 5S methodology.

Welding sequence optimisation in the automotive industry: A review

2019 ◽  
Vol 233 (17) ◽  
pp. 5945-5952
Author(s):  
Varshan Beik ◽  
Hormoz Marzbani ◽  
Reza Jazar
Keyword(s):  
Automotive Industry ◽  
Spot Welding ◽  
Fast Rate ◽  
Welding Process ◽  
Future Research ◽  
Automotive Body ◽  
Welding Sequence ◽  
Common Technique ◽  
The Common

Spot welding is the most common technique used to join sheet metals in the automotive industry due to the fast rate of production. Optimising the welding process including the sequence, number and location of the welds would significantly improve the quality of the final product and production cost. This paper presents an overview on the available methods to plan and optimise various aspects of the welding process including welding sequence, weld quantity and location. Firstly, the welding concept in the automotive industry is briefly reviewed. Secondly, the welding process optimisation with emphasis on the welding sequence is discussed. The common gaps and challenges are identified and, lastly, future research to plan and optimise the welding sequence in the automotive body is outlined.

The Materials Balance-Scientific Fundamentals for the Quality Assurance of Vitrified Waste

1981 ◽  
Vol 11 ◽  
Author(s):  
Edwin Schiewer ◽  
Harald Rabe ◽  
Siegfried Weisenburger
Keyword(s):  
Quality Assurance ◽  
Quantitative Analysis ◽  
Chemical Processes ◽  
Glass Product ◽  
Short Term ◽  
Materials Balance ◽  
Glass Output ◽  
The Stability ◽  
Composition Process

In the vitrification of HLW the aim is to create a product, the stability (thermal, mechanical) of which is, to the greatest possible degree, independent of fluctuations in its composition. Process control during vitrification of HLLW is necessary in order to assure the quality of the final glass product. The chemical processes are controlled by quantitative analysis of all material streams entering and leaving the melting device. There are six material streams to consider: frit input, waste input, corrosion products (generated by the vitrification process), off-gas, recycled off-gas, glass output. Additionally, the capacity of the glass for buffering short-term fluctuations in the incoming streams must be known. Sufficient sampling during non-radioactive vitrification in addition to materials tests can provide the necessary data basis. The results are combined in a materials balance.

scholarly journals Quality assurance and control system for railway track tamping

2018 ◽  
Vol 216 ◽  
pp. 03004 ◽  
Author(s):  
Andrey Ilinykh ◽  
Alexey Manakov ◽  
Andrey Abramov ◽  
Sergey Kolarzh
Keyword(s):  
Quality Assurance ◽  
Quality Criteria ◽  
Railway Track ◽  
Rolling Stock ◽  
Theoretical Studies ◽  
The Stability ◽  
And Control ◽  
Control Methodology ◽  
Quality Assurance And Control

Ensuring stable parameters of a railway track after bringing it into a design position is a key measure of quality for evaluating completed repairs. Identifying quality criteria for sleeper tamping using a special rolling stock is a high-priority problem for a railway track infrastructure. This problem is complicated by a large choice of ballast compaction, leveling and finishing machines, totaling more than 30 types. The paper presents results of theoretical studies aimed at assuring and controlling the quality of tamping by multi-purpose track machines. The factors that determine the stability of railway track parameters in operation were identified. The track repair processes were analyzed. The operating factors that are essential for developing qualitative process parameters were identified for various types of track machines. Based on the findings of these studies, a quality assurance and control methodology was developed for railway track repair and maintenance operations.

Influence of Power Supply Energy Characteristics upon the Stability of MMA Process

2015 ◽  
Vol 756 ◽  
pp. 97-100 ◽  
Author(s):  
D.P. Il’yashchenko ◽  
Dmitry A. Chinakhov ◽  
Yu.M. Gotovshchik
Keyword(s):  
Power Supply ◽  
Stable Process ◽  
Welding Process ◽  
Power Supplies ◽  
Lower Amount ◽  
Service Reliability ◽  
Metal Arc Welding ◽  
Inverter Power Supply ◽  
The Stability

The paper provides the results of experimental study of how the technological characteristics (amount of spatter, stability of the welding process) of manual metal arc welding (MMA) depend upon power supplies providing various kinds of energetic impact upon the electrode metal (inverter power supply, diode rectifier). It was established that inverter power supplies (as they reduce peak loading) provide better quality of welds (more stable process, lower amount of spatter) and this reduces the fabrication cost due to the reduction of deseaming operations, lower welding material consumption as well as improving the service reliability of the welding constructions.

scholarly journals Análisis de la resistencia de piezas soldadas por el proceso de resistencia eléctrica

2020 ◽  
pp. 1-9
Author(s):  
José Antonio Medina-Mendoza ◽  
Gerardo Méndez-Macías ◽  
Naieli Herrera-Reyes
Keyword(s):  
Automotive Industry ◽  
Electrical Resistance ◽  
Spot Welding ◽  
International System ◽  
Stress Test ◽  
Welding Process ◽  
Hydraulic Press ◽  
Metal Parts ◽  
Automotive Parts

A stay has been carried out in a metalworking company located in the Valle de Aguascalientes Industrial Park, in order to carry out a study that can reflect the state of manufacture of various metal parts that involve an electrical resistance welding process. The manufacturing area is called Automotive and has 5 welding machines of various brands and capacities in which different models of automotive parts are manufactured for various clients of the automotive industry in Aguascalientes Mexico. The study focuses on the review of the process based on the regulations that are handled in the company and that are the JIS B 1196 referring to spot welding, from which two main characteristics are extracted to guarantee the quality of the product and that are the resistance to weld stress and torsional strength. The manufacturing standards used determine that every hour a stress test must be carried out on the different manufactured parts according to their classification, welding is tested on 6M, 8M and 10M nuts of the international system applying loads in a brand FORSE DX-2.5 model hydraulic press and one hundred percent tests torque on parts with 6M nuts welded, which are tested in a devise of our own design. The data taken for the evaluation were obtained in the company's metrology laboratory and showed a very marked dispersion, although said data apparently did not exceed the established limits. A review and evaluation of the process was carried out and limits and improvements were proposed that guarantee good quality of the products. Some practices that can affect quality were found, they are described and a solution is proposed to prevent them from being carried out in the process.

Criteria for evaluation of the coordinate measurements quality of parts geometric parameters at pilot-experimental production

2019 ◽  
pp. 3-8
Author(s):  
N.Yu. Bobrovskaya ◽  
M.F. Danilov
Keyword(s):  
Quality Indicators ◽  
Quality Management System ◽  
Technical Specification ◽  
Experimental Production ◽  
Technological Heredity ◽  
Coordinate Measurements ◽  
Reasonable Choice ◽  
The Stability ◽  
Geometric Elements

The criteria of the coordinate measurements quality at pilot-experimental production based on contemporary methods of quality management system and traditional methods of the measurements quality in Metrology are considered. As an additional criterion for quality of measurements, their duration is proposed. Analyzing the problem of assessing the quality of measurements, the authors pay particular attention to the role of technological heredity in the analysis of the sources of uncertainty of coordinate measurements, including not only the process of manufacturing the part, but all stages of the development of design and technological documentation. Along with such criteria as the degree of confidence in the results of measurements; the accuracy, convergence, reproducibility and speed of the results must take into account the correctness of technical specification, and such characteristics of the shape of the geometric elements to be controlled, such as flatness, roundness, cylindrical. It is noted that one of the main methods to reduce the uncertainty of coordinate measurements is to reduce the uncertainty in the initial data and measurement conditions, as well as to increase the stability of the tasks due to the reasonable choice of the basic geometric elements (measuring bases) of the part. A prerequisite for obtaining reliable quality indicators is a quantitative assessment of the conditions and organization of the measurement process. To plan and normalize the time of measurements, the authors propose to use analytical formulas, on the basis of which it is possible to perform quantitative analysis and optimization of quality indicators, including the speed of measurements.

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