Repair Of Machinery Research Articles

Primena anaerobnih lepkova kod popravki mašina

Primena anaerobnih lepkova kod popravki mašina

Analisis Prosedur Perawatan Mesin Motorizer Sedimen di PDAM Tirta Pakuan Kota Bogor

This research have objective to determine the application of procedures, mismatches work processes and maintenance of machinery repair and analyze the causes of motor engine damage in the PDAM Tirta Pakuan Bogor City. The data used in this research are primary and secondary data. Primary data obtained through observations and interviews to the parties concerned in the mechanical and electrical parts. Secondary data in the form of data SOP maintenance and repair machine from company. Descriptive, comprative, and evaluative methods are used to analyze the actual condition and working procedures of maintenance and repair of machinery and to compare between the results obtained from this research on the implementation of the maintenance work process and the repair of machines there are still stages that are not executed according to the procedure. Using the Fishbone Diagram method, the most dominant type of damage occurring in the motorizer engine is a burning roll with a contribution rate of 53.125%. Using Pareto Diagram, this analysis can provide information for the company to pay more attention to the maintenance and repair activities of the machine so that the work process activities in the mechanical and electrical section run well and smoothly.

Сравнительный анализ процесса приёмки в ремонт сельхозтехники при плановой и рыночной экономике в рамках технического сервиса

This article discusses issues related to the scientific and methodological problems of the acceptance of the machines for repair and their solutions.
 The production process of machinery repair is a set of human actions and manufacturing instruments, performing in a certain sequence and providing recovery, serviceability and full (or near full) resource products. It consists of a series of technological processes.
 External cleaning, washing and inspection repair is among the most important technological reconditioning processes.
 During the period of Russia's regional associations and specialized departments "Agricultural machinery" all tractors, automobiles, appliances and machines when accepting in the overhaul or issuing from it had to met the "technical specifications for delivery in overhaul and the issuance from the overhaul of tractors and self-propelled chassis, engines, their units and assemblies" (TU 70-260-71). The machine must be complete. 
 At present, the institutional conditions of delivery vehicles and other mechanisms for repair in the technical service has changed substantially. However, technical requirements cannot and should not be significant changed, since the conditions of vehicles operating mechanism and require the highest quality as the machine as a whole and its parts.
 The article considers the basic requirements and ways to optimize the process of acceptance in the repair of vehicles through the example of special-purpose vehicles as part of their technical service.

“Smart Service” as an innovative system of service for mining companies in Kuzbass

The article deals with the issues related to the introduction of “smart service” as an innovative system of equipment service in the business system and “Life-Cycle Management” (LCM) by mining equipment manufacturers. Based on the analysis of the competitive environment an overview description of the competitive environment in the field of equipment sales for surface and underground mining as well as for maintenance and repair of mining machinery for surface mining is presented. The article describes the results of the survey of top managers from company-clients of the company “Joy Global” to identify the demand characteristics of mining companies in using the “Life-Cycle Management” program ranking them in order of priority. To justify the viability of the corporate service package taking into account the individual needs of mining companies within the system “smart service” the contingency of service package and their demand by mining enterprises is used.

Farm machinery repair costs: a case study at oil palm plantations in Malaysia

Repair costs of farm machinery vary depending on specific geographical conditions of a country. This study was conducted to investigate current data on farm machinery repair costs with respect to characteristics of oil palm plantations in Malaysia. Relevant data were collected through face-to-face interviews and surveys that were carried out at several oil palm estates in Malaysia. Spreadsheet software was used to analyse the collected data. Findings of the study indicated relationships between farm machinery size and annual average repair costs in accordance with specific conditions and type of operations at the plantations. The relationships between farm machinery size and annual hours of farm machinery use, and farm machinery age are also discussed. This study also established a specific mathematical model for estimating Cumulative Repair and Maintenance (CRM) costs of farm machinery in Malaysian oil palm plantations.

Farm machinery repair costs: a case study at oil palm plantations in Malaysia

Repair costs of farm machinery vary depending on specific geographical conditions of a country. This study was conducted to investigate current data on farm machinery repair costs with respect to characteristics of oil palm plantations in Malaysia. Relevant data were collected through face-to-face interviews and surveys that were carried out at several oil palm estates in Malaysia. Spreadsheet software was used to analyse the collected data. Findings of the study indicated relationships between farm machinery size and annual average repair costs in accordance with specific conditions and type of operations at the plantations. The relationships between farm machinery size and annual hours of farm machinery use, and farm machinery age are also discussed. This study also established a specific mathematical model for estimating Cumulative Repair and Maintenance (CRM) costs of farm machinery in Malaysian oil palm plantations.

Changes in the standard of unified system of tolerances and fits

The unified system of tolerances and fits is a very important system that provides internationally the interchangeability of products, and is widely used in machine-building and instrument-making industries, in repair and maintenance of machinery and in other fields. The new standard 286-1:2010 of International Organization for Standardization provides an improved international system of tolerances on linear dimensions containing series of tolerances and deviations. It contains the clear indication that the system refers to the two types of dimensional features, namely a cylinder and two parallel planes. In the older version of the standard 286-1:88, to interpret the part feature dimension the rule of outer limits was applied a priori, however, in the international standard 14405-1:2010, the interpretation of dimension on the double-point measurement was established. It means that the accuracy of form deviation no longer depends on the dimension accuracy and the requirements to the form should be established separately. Now, in many cases, normalization only of the diameter tolerance is not enough to control the design and performance characteristics of the joint. Theoretically, as provided by geometrical product specifications, it is necessary to establish the requirements and determine the outer limit; as well as in some cases, it is necessary to normalize the requirements for tolerances of form, waviness and surface roughness. The article describes the changes in the terminology from the perspective of the theory of precision and interchangeability. It is concluded that all minor changes in the terms, concepts and regulations do not affect the overall construction of the unified system of tolerances and fits, but clarification of a number of old terms and introduction of new concepts take place. Most significant is the arising of new link between the standards on geometric characteristics of products based on the principle of the general construction of models of precision and common terminology. Of particular note is a bad translation of English version into Russian language. The scientists working in the theory of precision and interchangeability were not involved in the translation. Most of the newly introduced terms could be interpreted more technically-oriented and more understandable.

Effect of Kettlebell Lifting on Physical Condition of Future Mechanical Engineers

The objective of the paper is to study the effect of exercises with kettlebell lifting elements on the physical condition of future mechanical engineers.
 Materials and methods. To address the tasks set, the study used the following research methods: theoretical analysis and collation of literary sources; implementation of a pilot program of physical education through kettlebell lifting in higher agricultural educational institutions; methods of mathematical statistics.
 Research results. The paper focuses on the relevant issue of theoretical and methodological support of the process of improving students' physical condition. The study has determined the effect of kettlebell lifting on the physical condition of the future mechanical engineers involved in maintenance and repair of agricultural equipment and machinery. Kettlebell lifting proves to provide good physical training, has a positive effect on the human body, and strengthens health in general. The research conducted gave grounds to determine that the level of the physical condition of the test group students is satisfactory on all indicators. This meets the requirements set before the future specialists.
 Conclusions. The study of the effectiveness of kettlebell lifting influence on the physical condition of the test group students yielded positive results. As a result, the training improves the performance of the students’ respiratory and cardiovascular systems, decreases their heart rate and blood pressure, enhances economization of the body systems performance at rest and at load, boosts the reserve capacity of these systems, reduces the recovery period after load, and improves the metabolic processes, which contributes to enhancing the organism tolerance to the unfavorable factors of the profession-related activity.

Abstract 2028: Transcriptional modules involving EWS-FLI1 and SRF in Ewing sarcoma

Abstract Ewing Sarcoma (ES) is an aggressive pediatric bone tumor with a high tendency to metastasize. The primary genetic aberration responsible for ES pathogenesis is EWS-FLI1, a chimeric gene, derived from the chromosomal translocation t(11;22)(q24;q12). EWS-FLI1 encodes an aberrant ETS transcription factor. However, due to its lack of enzymatic activity and intrinsically disordered structure it has yet not been successfully targeted. EWS-FLI1 is prone to rapidly engage in protein-protein complexes, enhancing its oncogenic activity. It has been reported to be involved in interactions with regulators of the basal transcriptional machinery, RNA processing and DNA repair. Furthermore, it has been shown that, similar to the ternary complex factors (TCF) SAP1a and ELK1, EWS-FLI1 is able to form a complex with the global transcriptional regulator Serum Response Factor (SRF) on ETS containing promoter elements. SRF binds to CArG motifs in serum response elements (SRE) and requires a transcriptional co-activator, which is commonly provided upstream via the Rho- or the Ras-axis. Upon serum induced Rho activation, polymerization of globular (G-) actin into filamentous (F-) actin takes place, thereby releasing the G-actin bound myocardin-related transcription factors A and B (MRTFA/B) to translocate to the nucleus and concertedly with SRF regulate transcription of target genes. Binding of MRTFs to SRF is mutually exclusive and competed by TCFs, which are activated downstream of Ras, and require presence of an ETS motif adjacent to CArG. In this study we aim to investigate a potential competition of EWS-FLI1 with MRTFs, which might uncouple SRF dependent transcription from upstream G-protein linked regulation and hence interfere with processes such as proliferation, migration and differentiation. To address this question, we performed gene expression profiling in A673 and SKNMC ES cell lines where we combined EWS-FLI1 knockdown with MRTFA/B knockdown under serum starved and serum induced (SI) conditions. We found that transcriptional activity of MRTFA/B is largely repressed by EWS-FLI1 and that upon combined knockdown conditions, EWS-FLI1 transcriptional effects are rescued by MRTFA/B. To further elucidate the underlying mechanisms of EWS-FLI1 and MRTFA/B gene regulation, we performed chromatin immunoprecipitation combined with massive parallel sequencing (ChIP-seq) of MRTFA, MRTFB, SRF and EWS-FLI1 in A673 ES cells. Preliminary results corroborate EWS-FLI1 and MRTF sharing a large number of target genes and indicate that MRTFA binds to DNA motifs, which are associated with activated and repressive EWS-FLI1 signatures. Ongoing experiments aim at a proteomic understanding of the EWS-FLI1 containing SRF complex as a basis for potential therapeutic intervention. This study was supported by the Liddy Shriver Sarcoma Initiative and the 7th framework program of the European Commission (FP7-259348, “ASSET”). Citation Format: Anna M. Katschnig, Maximilian O. Kauer, Dave N t Aryee, Raphaela Schwentner, Elizabeth Lawlor, Heinrich Kovar. Transcriptional modules involving EWS-FLI1 and SRF in Ewing sarcoma. [abstract]. In: Proceedings of the 107th Annual Meeting of the American Association for Cancer Research; 2016 Apr 16-20; New Orleans, LA. Philadelphia (PA): AACR; Cancer Res 2016;76(14 Suppl):Abstract nr 2028.

СОВЕРШЕНСТВОВАНИЕ ТЕХНОЛОГИИ СБОРКИ СОЕДИНЕНИЯ ДЕТАЛЕЙ С НАТЯГОМ

The purpose of the study is to increase the strength of the collected compounds and to expand the technological accuracy of the method of Assembly with an interference fit. Fixed press-fit connection with interference are widely used in machine building, when the transfer of substantial axial forces are required, torques or combined loads from their joint action. Resistance to mutual misalignment of the parts in these compounds is created and supported by the forces of elastic deformation on the mating surface of the covered part (shaft) and stretching on the mating surfaces of the covering parts (holes) is proportional to the magnitude of the preload in the connection. In such compounds, the diameter of the shaft before Assembly is always larger than the diameter of the hole. In the article the analysis of the known different ways of joining parts with interference fit, including hydraulic presses. The second problem is solved due to the fact that the connection details with tightness is carried out by pressing the press stroke from one detail to another, and the breakdown of the compounds obtained by the relative longitudinal movement of parts, in which the breakdown is carried out periodically in the process of pushing through the transfer of force from the press stroke to pressed items to the elastic connection. The force on the press stroke is created by a hydraulic cylinder with large displacement, a resilient connection between the slider and pressed item performs in the cylinder, the fluid pressure and volume which can be adjusted by changing the stiffness and capacity of the drive RAM, as well as the magnitude of its longitudinal movement during the disruption. The scheme of Assembly of the connection de-hoist with tension. Original technical solution for press fit connection parts extends the technological possibilities of the equipment, increases the strength of the collected compounds and can be used in machine building, particularly in mechanical Assembly processes and, in particular, in the repair and production of agricultural machinery.

Quality of agricultural machinery and control of its manufacture and repair

The article considers the factors influencing on the quality of manufacture and repair of agricultural machinery from the perspective of application of one of the newest methods of the quality analysis known as Principle of 5 M - men, methods, materials, machines, measures. It is defined that in all five indices the domestic agricultural machinery considerably lags behind the foreign one. The main reasons are the use of cheap raw materials, the lack of modern processing equipment with high precision, the lack of highly skilled and highly paid workers, the designing of machines by means of archaic methods, the small degree of information support on modern technologies and specifics of branch machinery, especially internationally. The role of control in formation of quality of manufacture and repair of agricultural machinery is highlighted. The purchasing manager of a large repair enterprise has to provide in the contract for delivery of incoming production the conditions on the presence of a defined limit of defects with selective check of incoming consignment. For a small enterprise, there is the simple recommendation to take a technical documentation and instruments of control along when going on a warehouse for spares, and to buy only good products of manufacturer or well-established similar products. The main objectives of metrological service in repair enterprises are defined. Modern metrological provision during machine repair is the system ensuring the quality of control that includes: the strict ensuring unity of measurements; the choice of critical control points, which are subject to rigid control; the feasibility study of choice of measuring instruments by criteria of minimization of costs and losses for controlled products; the regular actions on adjustment of measuring instruments, the tests and control during maintenance and repair of agricultural machinery.

Improvements of harrows wear resistance

Wear is the main reason for the loss of performance of the parts for agricultural machinery. It leads to the degradation of the soil working quality. This work aims to highlight the wear resistance of the harrows discs manufactured, consolidated and sharpened differently. The tests were conducted in the laboratory and the field of the Faculty of Exploitation and Repair of Agricultural Machinery of the State Technical University of Kirovograd (Ukraine) in 2015. The technical equipment consists of devices for consolidation by electric discharge and for measurement the linear wear of discs, a harrow, a sand test bed, a tractor and discs made of different materials and technologies. Some parameterized were collected during the laboratory test each 5 ha and up to 20 ha of operation and in the fields each 30 ha until the time limit of exploitation. The Laboratory tests have shown that after twenty (20) ha of operation, the wear resistance of the experimental discs made of steel 65G and consolidated by electric discharge with simultaneous grinding (sharpening angle of 30°) is 2.95 times higher than the discs in series made of steel 28MnB5. The field experiment gave the following results: According to agro technical requirements, the plowing depth limit of serial discs made of steel 28MnB5 was reached after an operating duration of 120 ha while for experimental discs made of steel 65G and consolidated by electric discharge with simultaneous grinding (sharpening angle of 30 degrees) this duration is of 156 ha. The diameter wear limit of experimental discs was reached after an operating duration of 179 ha against 154 ha for the serial ones. Therefore, the new technology can be applied during the manufacture and / or the repair of the discs.Int. J. Agril. Res. Innov. & Tech. 5 (2): 70-74, December, 2015

Application Analysis on Force Multiplication Drawing Device

In the field of mechanical installation and repairing, drawing devices are often used to disassemble or push up components of various types of axie and set. Nowadays it is widely used in areas such as mechanical installation, machinery manufacturing, machinery repair, but still have problems to be used well with an appropriate force. The article presents a new kind of drawing device named force multiplication drawing device. It is designed by using the lever principle and can acquire much stronger drawing force. After theoretical calculations, it is proved to be very valuable.

Improvement of Strength and Wear Resistance of Metal Products with Ion-Plasma Nitride Coatings by Pulse Technique Implementation*

The article covers the innovative technology developed at Pisarenko Institute of Problems of Strength, National Academy of Sciences of Ukraine, i.e., the ion-plasma coating deposition pulse technique, which offers a considerable opportunity for producing diffusion layers of a desired structure by controlling the process of diffusion saturation and its optimization depending on the specific engineering requirements. The diffusion layers with nitrided and non-nitrided phases can be obtained by adjusting the composition of ionized gases and glow charge intensity. The proposed innovation, which was nationally patented in 2013, is currently used for small-scale industrial implementation in domestic aircraft and machinery repair shop-and-plants. A brief review of the state-of-the-art industrial developments in this area implies that the proposed technique can be utilized in available commercial applications for PVD coating deposition. The results of experimental studies on static strength, fatigue, and wear resistance in corrosive environments of 40Kh13 steel specimens treated by the proposed pulse technique confirm its positive effect. 2TK]

Cavitation erosion resistance of two steels with the same percentage of Chromium and Nickel but different Carbon content

Hydraulic machinery repair works necessitate new materials with improved cavitation erosion resistance and simultaneously good welding properties. The present paper is concerned with the behavior at cavitation of two steels with close contents of chromium (approximately 12%) and nickel (approximate 6%) but with different carbon content (for the first 0.1% C and the second 0.036% C). The reduced carbon content is necessary for an easy welding repair work. As a result of the different chemical content, as is shown by the Schäffler diagram, the steel containing 0.1% C has a structure formed by 60% austenite and 40% martensite while those with 0.036% C has completely martensitic structure. The laboratory tests were done in two vibratory devices one with piezoelectric crystals, respecting the ASME G32-2010 Standard and the other a magnetostrictive vibratory device with nickel tube. The evaluation of the cavitation resistance was obtained with the help of cavitation erosion characteristic curves MDE (t) and MDER (t). For analyzing the steel degradation, the eroded areas were also subjected to microscopic investigations. The results show that the steel with 0.1% C has better cavitation erosion behavior than that of the steel with 0.036% C.

Analysis of the Improvement of the Drawing Die in Drawing Device

Drawing devices, as an important auxiliary equipment, nowadays widely applied in areas such as mechanical installation, machinery manufacturing, machinery repair, but still have problems to fit into the workpiece of larger size and of difform shape. The article presents a new kind of drawing device with a novel drawing die,which not only well solve the problem mentioned but also greatly improve the use efficiency and the use value by analyzing the existing deficiency in drawing devices.

Occupational exposures and colorectal cancers: a quantitative overview of epidemiological evidence.

A traditional belief widespread across the biomedical community was that dietary habits and genetic predisposition were the basic factors causing colorectal cancer. In more recent times, however, a growing evidence has shown that other determinants can be very important in increasing (or reducing) incidence of this malignancy. The hypothesis that environmental and occupational risk factors are associated with colorectal cancer is gaining ground, and high risks of colorectal cancer have been reported among workers in some industrial branches. The aim of this study was to investigate the epidemiologic relationship between colorectal cancer and occupational exposures to several industrial activities, by means of a scientific literature review and meta-analysis. This work pointed out increased risks of colorectal cancer for labourers occupied in industries with a wide use of chemical compounds, such as leather (RR = 1.70, 95%CI: 1.24-2.34), basic metals (RR = 1.32, 95%CI: 1.07-1.65), plastic and rubber manufacturing (RR = 1.30, 95%CI: 0.98-1.71 and RR = 1.27, 95%CI: 0.92-1.76, respectively), besides workers in the sector of repair and installation of machinery exposed to asbestos (RR = 1.40, 95%CI: 1.07-1.84). Based on our results, the estimated crude excess risk fraction attributable to occupational exposure ranged from about 11% to about 15%. However, homogeneous pattern of association between colorectal cancer and industrial branches did not emerge from this review.

IETM Technology is the Development Direction of Engineering Machinery Maintenance

Based on the interactive electronic technical manual (IETM) characteristics of the analysis, combined with the current situation of China's engineering machinery repair, comparative analysis of technical advantages of using IETM technology in engineering machinery repair in data acquisition technology, from the speed, fault isolation efficiency and personnel's work efficiency and other aspects, discusses the necessity of its application; combined with IETM production standards, from the main creative part of IETM, such as information generation, information management, production of interactive interface, several aspects of publishing, explains IETM make the development process and the main production platform. By using the structure block diagram, showing the method of information production and information management mode, and the main modules in the block diagram and function are described; and discusses future development proposals.

Labor costs of livestock machinery maintenance and repair

A method of standards use for labor resources and time expenditures in terms of relative unit of maintenance and repair difficulty category by machine and equipment groups for modern technical service is presented.

Mechanical Assembly Design Strategy for Rapid Development of Technology

The mechanical assembly is to achieve mechanical parts or components connected in accordance with the technical requirements of the design, and combine the mechanical parts or components into the machine. The mechanical assembly is an important part of the machinery manufacturing and repair, especially for mechanical repairs, due to the offering of Machinery Manufacturing assembly parts has advantage for Machinery make, this makes the assembly work of an exceptional nature. The quality of assembly work plays a very important role on the machine performance, the duration of the repair work of labor and cost.