scholarly journals ЗНИЖЕННЯ МЕТАЛОМІСТКОСТІ РОТАЦІЙНО-ПРОФІЛЬОВАНИХ КОЛІСНИХ ОБОДІВ РІЗНИХ ТИПІВ І ТОВЩИНИ

2021 ◽  
pp. 78-86
Author(s):  
Е. Фролов ◽  
Б. Коробко ◽  
С. Ясько ◽  
В. Агарков
Keyword(s):  
Economic Effect ◽  
Second Step ◽  
Metal Consumption ◽  
Technological Parameters ◽  
Central Section ◽  
Workpiece Material ◽  
Elastic Deformations ◽  
Permissible Stress ◽  
Edge Elements ◽  
Deformation Force

The research carried out made it possible to develop a new scheme for the process of rotary profiling of wheel rims, which allows to reduce the specific quantity of metal for parts. The essence of the solution lies in the fact that at the second step the jet central section is additionally made more powerful. This allows to change the nature of the deformation after the second step and to eliminate unnecessary thickening of the jet base. With an increase in the jet depth the edge sections are subjected to insignificant tensile stresses, while the stress-strain state of the part remains symmetric and constant at each point. The worked out sequence of calculating a new technological process allows calculating all technological parameters: width and length of a flat workpiece; maximum permissible stress in the workpiece material; a profiling route; as well as to identify deformations and stresses for edge elements and in hazardous areas. Further, taking into account the elastic deformations of the workpiece, the profile of the rollers was built, and then optimal deformation force along the transitions was calculated, then feed and the number of revolutions of the rollers were assigned. The new scheme made it possible to reduce metal consumption for parts and obtain a significant economic effect. Ovality of the part and multiple repeated deformation of the same sections of the workpiece are eliminated, and the degree of strengthening of the material is also reduced.

scholarly journals CONSTRUCTION OF AN EFFECTIVE WAREHOUSE SYSTEM OF THE ENTERPRISE IN THE PROCESSING OF AGRICULTURAL CARGO

2021 ◽  
Vol 6 (166) ◽  
pp. 217-226
Author(s):  
O. Pavlenko ◽  
D. Velykodnyi
Keyword(s):  
Performance Indicator ◽  
Optimization Problems ◽  
Economic Effect ◽  
Unit Cost ◽  
Maximum Level ◽  
Technological Parameters ◽  
Goods And Services ◽  
The Third ◽  
Use Of Resources ◽  
The Moment

The article investigates the existing trends and prospects for the development of warehousing services in the system of production and processing of products, which allowed us to form the purpose of the research in this development. The chosen theme is quite topical, because warehousing processes are an integral part of the formation of supply logistics in modern production processes. One of the ways to reduce the cost of goods and services is the efficient use of resources. Ukrainian and foreign scientists have touched many questions concerning the development of the infrastructure component, solutions of optimization problems regarding the process of import-export of goods to the warehouse, but without determining the optimal values ​​of technological parameters of warehousing systems. The technological scheme of operation of the warehouse system of the enterprise LLC "MEGA CRISP» allows to see the whole chain of operations from the moment of arrival of the vehicle with cargo (containers and packaging) to the moment of sending the cargo (finished product) to the recipient; the necessary types of resources involved in these processes are also taken into account. Total costs were chosen as an evaluation indicator of the choice of an efficient supply channel. Relevant parameters of influence are taken into account: intensities of corresponding cargo flows, unit cost of the appropriate work and one hour of work of one worker, time of performance of an appropriate operation, quantity of the involved resources for performance of the appropriate operation and working time of the warehouse during the day. An imitation full-factor experiment was performed, based on the results of which a regression model in linear form with a non-zero coefficient was determined, in which each coefficient indicates the degree of influence of the relevant factor on the performance indicator. The results of determining the economic effect showed that "Variant 2" (increasing the number of workers) is the least expensive, and the level of costs is lower for all series of experiments compared to the basic variant - "Variant 1". The maximum difference is reached in 12217.8 hryvnias at the maximum loading of a warehouse. And when comparing the third and first variants: only at the maximum level of output flow (170 t / h), the third variant will be cheaper by 852.6 hryvnias. The highest level of positive value of the effect among the variants offered is "Variant 2", the level of savings will be 12,217.8 hryvnias per shift.

scholarly journals Technology and equipment of vertical‑stack molding for the production of castings without pattern drafts

2021 ◽  
pp. 33-37
Author(s):  
V. V. Fonov ◽  
S. N. Grechanik ◽  
D. M. Golub
Keyword(s):  
Internal Combustion Engines ◽  
New Technology ◽  
Economic Effect ◽  
Combustion Engines ◽  
Molding Machine ◽  
Metal Consumption ◽  
Piston Rings ◽  
Industrial Sample ◽  
Technical Products ◽  
Use Of Models

The article reports on the new technology and equipment of vertical‑stack molding (VSM), created by OJSC “BELNIILIT” for the manufacture of vertical‑stack molds. The development is intended for the production of molds and cast blanks of oil, which are later used for the manufacture of piston rings of internal combustion engines.The difference between the above‑mentioned technology and traditional methods of VSM is the use of models without drafts. The development is export‑oriented and has a great economic effect for ring manufacturers due to the absence of drafts on castings, since part of the mechanical operations for their processing is excluded, the metal consumption of blanks is reduced, the production spaces required in this regard are reduced, the necessary labor supply is reduced, etc.OJSC “BELNIILIT” has successfully carried out experimental design and technological work on the new scientific and technical products creation, which are of great interest to the world manufacturers of piston rings. An industrial sample of a molding machine and a mold manipulator were manufactured.

Effect of active action friction forces on technological parameters of backward extrusion

2021 ◽  
pp. 25-33
Author(s):  
B.S. Moroz ◽  
M.G. Dudnik
Keyword(s):  
Extrusion Process ◽  
Technological Parameters ◽  
Deformation Degree ◽  
Friction Forces ◽  
Backward Extrusion ◽  
Deformation Force ◽  
Active Friction Forces ◽  
The Impact ◽  
Experimental Researches ◽  
Experimental And Theoretical Studies

The parameters of deformation degree at theoretical and experimental researches of cold backward extrusion processes of hollow glasses-type products are considered. The dependences of their relationship with the relative degree of deformation and the scale of their conformity are suggested. The published results of experimental and theoretical studies on the impact of technological parameters of the backward extrusion process of hollow products in the conditions of active friction forces to reduce the deformation force and stress-strain state of the billet are analyzed. Insuffi ciently studied features of the process and the possibility for expanding of the application fi eld of the backward extrusion method with the active action of friction forces are noted. The method for calculating of the deformation rate required to determine the current stress in the implementation of the hot backward extrusion process.

Metal resistance to deformation of drill pipes steels

2020 ◽  
Vol 76 (8) ◽  
pp. 826-829
Author(s):  
A. V. Zinchenko ◽  
B. V. Barichko ◽  
V. D. Nikolenko ◽  
T. N. Zharkaya ◽  
V. L. Neroznikov
Keyword(s):  
Sample Volume ◽  
Metal Resistance ◽  
Temperature Deformation ◽  
Technological Parameters ◽  
Isothermal Exposure ◽  
Sample Height ◽  
Resistance To Deformation ◽  
Current Variation ◽  
Deformation Force ◽  
Drill Pipes

To define the energy and force parameters of metal forming processes, it is needful to know the value of the strain resistance. Evaluation of influence of hot deformation technological parameters of steels on the value of metal resistance to plastic deformation was done. For the study samples of 25ХГФМА and 32Г2У steels were used in the form of cylinders of 8.0 mm diameter and 12.0 mm height. The hot upsetting of the samples was accomplished at the Gleeble-3800 simulator of thermo-mechanical processes. Heating of the samples, placed in a vacuum chamber, was done directly by passing electric current through them. The samples were heated to deformation temperature with rate of 5 °C/sec, followed by an isothermal exposure within 3 min to make the temperature even in the sample volume. The deformation was accomplished at the temperatures 1000, 1050, 1100, 1150, 1200, 1250°C and deformation rate 1.0 and 0.1 sec–1. To prevent welding of the samples to the surface of the working instrument (hardmetal striker), a 0.1 mm thick molybdenum foil was placed between a sample and strikers. In the process of the experiment, the sample temperature, deformation force and current variation of a sample height were recorded. It was determined, that parameters of resistance to deformation, obtained in the process of the experiment by using Gleeble-3800, were higher by 25–30%, than those cited in literature, which were obtained by using a multi-cam plastometer. The specified data on the resistance to deformation were intended for application at PJSC “Tagmet” when designing technological modes of ends upsetting of drill pipes made of steels 32Г2У and 25ХГМФА to define the upsetting force.

Experimental Study on Unsynchronized Ultrasonic Assistance of Electro Discharge Machining Process

2014 ◽  
Vol 657 ◽  
pp. 241-245
Author(s):  
Sergiu Nanu ◽  
Niculae Marinescu ◽  
Daniel Ghiculescu
Keyword(s):  
Experimental Study ◽  
Electrical Discharge Machining ◽  
Machining Process ◽  
Plastic State ◽  
Technological Parameters ◽  
Workpiece Material ◽  
Electrode Tool ◽  
Working Parameters ◽  
Experimental Data Analysis ◽  
Edm Process

The paper deals with experimental study on unsynchronised (out of phase) ultrasonic assistance (US) of electrical discharge machining (EDM) process, considering finishing and semi-finishing operations. The main output technological parameters at classic EDM are not as good as they are expected due to instability of material removal process and long duration of gas bubble formed around plasma channel. The US longitudinal oscillations of electrode-tool produce cavitation within frontal working gap leading to collective implosion of gas bubbles. This hydraulic phenomenon can remove the workpiece material in solid or plastic state or even in liquid state. The goal of our study is to emphasize and quantify the influence of US assistance into EDM process and also to determine a correlation between EDM and US parameters, considering an unsynchronised condition. Nevertheless some optimization conditions of working parameters are needed to attain notable expected performances. From experimental data analysis, it can be noticed that significant growth in process productivity is achieved when EDM process frequency is equal with the ultrasonic assistance frequency.

scholarly journals FRACTIONAL TECHNOLOGY AND TOOLS FOR POST-HARVEST GRAIN TREATMENT AND PROCESSING WITH CRUSHING

2018 ◽  
Vol 12 (4) ◽  
pp. 16-21 ◽  
Author(s):  
P A Savinykh ◽  
Yu. V. Sychugov ◽  
V. A. Kazakov
Keyword(s):  
Production Efficiency ◽  
Economic Effect ◽  
Technological Parameters ◽  
Two Stage ◽  
Hermetic Storage ◽  
Post Harvest ◽  
Technological Line ◽  
Cleaning Machine ◽  
Combine Harvesters ◽  
Two Stages

The use of fractional technologies for post-harvest treatment and processing of grain heap delivered from field with further special purpose use of grain fractions leads to a significant increase in grain production efficiency. (Research purpose) Developing a fractional technology for post-harvest treatment and processing of grain with crushing and preservation of feed grain fraction and designing a technological line and machines for it. (Materials and methods) The authors have analyzed the technological level and developed a fractional technology for grain post-harvest treatment and processing by crushing with subsequent preservation of the feed grain fraction. They have offered a technological line and presented the design and technological parameters of the corresponding technical means (МЗУ-20Д - grain cleaning universal machine, МПО-30ДФ - preliminary grain cleaning machine with fractionation, ПЗД-3,1, ПЗД-10 – two-stage grain crusher). (Results and discussion) The authors have designed, manufactured and tested a universal grain-cleaning machine МЗУ-20Д. It efficiently cleans grain material coming from the field after its threshing by combine harvesters, and divides it into fractions: seed and feed grain – 60-70 percent, waste material - up to 10 percent, grain fodder - up to 40 percent. Further on, the grain is sent for crushing (for wet grain), followed by preservation and hermetic storage of the products obtained before their feeding to animals. Tests have shown that the developed feed preparation machine efficiently performs the technological process. The authors have developed a two-stage grain crusher (ПЗД-3,1), performing the crushing of grain material in two stages by three rollers, followed by preservation (for wet grain) of the feed grain fraction. (Conclusions) It has been established that the use of the new fractional technology and equipment contributes to an increase in grain cleaning productivity – by 30-40 percent, and the estimated annual economic effect of the renovation  is 400,000 rubles. The estimated annual economic effect of the use of the two-stage grain crusher (ПЗД-3,1) has proved to be more than 60 thousand rubles, and the level of production intensification has increased by 26 percent as compared to the MURSKA crusher produced in Finland.

scholarly journals RESEARCH OF METHOD OF CALCULATION AND SELECTION OF TECHNOLOGICAL PARAMETERS OF STAMPING WRAPPED WITH COMPLEX PROFILE PRODUCTS USING COMPUTER SIMULATION

2020 ◽  
pp. 123-133
Author(s):  
Mykola Kolisnyk ◽  
Maxim Sluzalyuk
Keyword(s):  
Shape Change ◽  
Flow Direction ◽  
Metal Flow ◽  
Technological Capabilities ◽  
Complex Profile ◽  
Technological Parameters ◽  
Stress Strain ◽  
Workpiece Material ◽  
Backward Extrusion ◽  
Selection Of

The article conducted a study of calculation methods and the selection of technological parameters for stamping by rolling in complex profile products. It is shown that the achievement of significant sizes of various elements of the workpiece is possible by ensuring the directional flow of metal by changing the relative positions of the roll and the workpiece. The most effective rolling stamping operations are upsetting, deposition and backward extrusion. The zones of workpieces that are deformed under stress conditions have been identified, therefore, to determine the technological capabilities for them, an assessment of the deformation of metals should be carried out. The manufacture of thin-walled elements of the workpiece using the operation of backward extrusion is accompanied by the appearance of significant contact stresses, therefore, to prevent the roll from being removed from the workpiece, back-up rollers should be provided. The analysis of the study showed that the stamping process by rolling over the workpieces with conical and cylindrical rolls makes it possible to control the flow direction of the workpiece material by changing the size and direction of the relative position of the axes of the workpiece roll, relative to the direction of rotation of the workpiece. The technological capabilities of SHO are limited mainly by the loss of stability and destruction of the workpieces, which, in turn, substantially depends on the direction of the metal flow in the contact of the roll with the workpiece. The modeling of the SHO process is considered. It has shown that the stress-strain state, the shape change and the deformability of the workpiece material substantially depend on these parameters. The purpose of the simulation was to analyze the stress-strain (VAT) state and shape change of the workpieces during the deformation process, to determine the energy-power parameters of the process, as well as the geometry of the deforming tool, providing a high-quality product with guaranteed profile filling, accurate dimensions in the transverse and longitudinal directions, as well as surface cleanliness profiled cavity.

scholarly journals RESEARCH OF TECHNOLOGICAL PARAMETERS OF THE GRATED INSTALLATION

2020 ◽  
Vol 8 (1) ◽  
pp. 95-100
Author(s):  
Sergey Malyukov ◽  
A. Knyazev ◽  
Aleksey Aksenov
Keyword(s):  
Russian Federation ◽  
Experimental Studies ◽  
Rotation Frequency ◽  
Metal Consumption ◽  
Technological Parameters ◽  
Coniferous Trees ◽  
Seed Placement ◽  
The Russian Federation ◽  
Forest Seeds

Annual harvesting of a large number of forest seeds allows for reforestation on the territory of the Russian Federation. Moreover, more than 70% falls on the seeds of coniferous trees. In order to increase their sowing quality and reduce losses, the seeds are dehumidified, cleaned, sorted by density and size, stratification, as well as other technological operations. The use of refined seeds during reforestation allows increasing the productivity of sowing units, improving the quality of seed placement, reducing the volume of seed bins, which leads to a decrease in the metal consumption of sewing machines as a whole. For experimental studies, special sieves were made: plastic with chamfered, plastic with standard holes and plastic with rounded edges. The dependences of the completeness of separation of the procode fraction ε were determined for various combinations of the angle of inclination α and the rotation frequency of the working body ω for various seed thicknesses. The angle of inclination of the working body α was changed from 4 ° to 12 °, in increments of 2 °, rotation frequency ω from 400 min--to 1200 min-¹, in increments of 200 min-¹. The size gap was set taking into account the dimensional characteristics of existing sieves with rectangular holes and was 0.2 mm. Studies were conducted on the seeds of common pine.

Metal Forming Smoothing of Flat Surfaces by Rolling

2015 ◽  
Vol 760 ◽  
pp. 463-468
Author(s):  
Gheorghe Sindilă
Keyword(s):  
Surface Quality ◽  
Metal Forming ◽  
Soft Materials ◽  
Technological Parameters ◽  
Flat Surfaces ◽  
Deformation Force

Metal forming smoothing processes are used to improve the surface quality of soft materials or of those materials that must withstand extreme fatigue and wear conditions. This paper highlights the influence of the main technological parameters upon the deformation force, as well as upon the hardness and the roughness of the processed surface.

scholarly journals INFLUENCE OF TECHNOLOGICAL PARAMETERS OF STEP FORMING ON STRESS-STRAIN STATE OF PIPE BILLET

2021 ◽  
pp. 63-68
Author(s):  
L. M. Gurevich ◽  
V. F. Danenko ◽  
S. P. Pisarev
Keyword(s):  
Finite Element ◽  
Strain State ◽  
Large Diameter ◽  
Technological Parameters ◽  
Stress Strain ◽  
Stress Strain State ◽  
One Step ◽  
Deformation Force ◽  
Kinetics Of ◽  
Longitudinal Seam

The stress-strain state in a pipe billet of longitudinal seam pipes of large diameter made of X70 steel has been studied by the methods of finite element modeling under various technological parameters. The kinetics of the change in the deformation force and reactions of the supports during one step of molding have been determined.

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