Use of Directional Solidification for Improving Tubular Workpiece Quality of Different Cast Irons

Bevza, V. F.; Grusha, V. P.; Krasnyi, V. A.

doi:10.1007/s11015-018-0689-8

Cited by 6 publications

(9 citation statements)

References 3 publications

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“…All gear teeth are cut at a feed speed of 4.1 m/min and in one pass with accuracy no worse than the 8 th degree. The transmission was tested on a stand with a closed power flow of existing design [4][5][6][7][8][9].…”

Section: Methodsmentioning

confidence: 99%

Influence of the Material Structure and Properties on the Wear Resistance of Gears with Different Geometries

Иванов

Shishkin

2021

MSF

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The article gives the description of experimental studies on the assessment of changes in the state of gear teeth of a mechanical transmission during tests on a stand with a closed power flow. Data on the gears made of cast iron materials are presented. The strength characteristics of gear wheel materials and their chemical composition are given. Operational life testing of gear sets with various geometries of gearing and made of gray cast was carried out. According to the conducted studies, it is found that by the optimization of the gearing parameters it is possible to increase the gear life by one and a half to two times without switching to more wear-resistant and durable materials. It is experimentally proved that the influence of geometrical parameters of gearing with combined displacement on the durability of gears is comparable with the replacement of material. When replacing the material of gears made of gray cast iron with alloy grades of cast iron, preference should be given to high-alloy wear-resistant cast iron with a surface hardness above average, and the effect of their use can be comparable to the effect of optimizing the gearing parameters.

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Section: Methodsmentioning

confidence: 99%

Influence of the Material Structure and Properties on the Wear Resistance of Gears with Different Geometries

Иванов

Shishkin

2021

MSF

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“…The main defects of production of the metal-cutting machine slideways at traditional technology of processing are burns, stripes, flay marks, scores, flutes, grooves, side chips and other mechanical damages of a working surface of slideways. Each deep and extended groove leads to accelerated wear of slideways and reduces smooth movements [7][8][9].…”

Section: Figure 2 Defects In the Production Of Bed Slideways And Requ...mentioning

confidence: 99%

“…Such structures are made of steel grades "Ст 20", "Ст 3", "Ст 4" and other. Despite low price and low weight, welded frames often provide rigidity no worse than cast iron structures [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

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Influence of Structural Parameters of Cutting Ceramics on Quality of Processing of Machine Slideways of Metal-Cutting Equipment in Selective Formation of Instrumentation

Gorshkov

Popov

2020

KEM

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Modern methods of machining of bed slideways with the required parameters of accuracy and quality of the processed surfaces are considered in order to increase productivity in the treatment of the surface of machine stands. To improve productivity, the finishing sanding operation has been replaced with finishing milling to ensure the required roughness, flatness and parallelism. The method of replacement of technological operations as exemplified by processing of a bed made of gray cast iron of grade “СЧ-20” is studied. The priority method of increasing the productivity of the processing of machine slideways of metal-cutting equipment, based on the use of cutting ceramics during the processing of the bed as a final technological operation, is determined. Based on the microstructural characteristics of oxide-carbide cutting ceramics, a uniform method of equipping cutters with cutting inserts with equal lifespan is used to increase productivity and achieve the required surface finish. This method of the milling cutter layout allows for longer life and provides the required margin of tool accuracy as well as allows predicting premature wear of the cutting tool. The results of the work are the identification of the patterns of influence of structural parameters of cutting ceramics on the quality of machine slideways of metal-cutting equipment in the selective formation of instrumentation. Studies have shown that the quality of machining depends on the microstructure characteristics of each insert used in the machining process when using interchangeable multi-sided oxide carbide ceramic inserts. The increase in productivity and quality of machining is achieved by monitoring the microstructure of the cutting oxide-carbide ceramics.

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“…Computer simulation of the cold angle rolling of a pipe workpiece in three stages with different angles of dip of the deforming roll makes it possible to predict the probability of rejects and choose optimal process parameters. A three-dimensional (3D) finite element (FE) [17][18][19][20] model of the cold angle rolling of flange gear is first constructed. Then, the processes of cold angle rolling in three stages at different angles of dip of the rolling roll are simulated, and the parameters of the main geometrical dimensions of the flanged parts are investigated.…”

Section: Introductionmentioning

confidence: 99%

Angular Rolling of the Hollow Flanges of Pipe Joints

Kononov

Ignatiev

Levashov

et al. 2021

Metals

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The paper considers a three-stage technology for angular rolling of the pipe workpiece. This technology facilitates the expansion of the range of flange parts available by eliminating a number of drawbacks of the known methods of metal forming. In the presented paper, we analyze the results of numerical calculations and experiments, as well as the effective deformation values in blank material, using computer simulation in the DEFORM-3D software package. The results of the computer simulation were reached taking into account experimental studies of the rheological properties of copper alloy L68 in the form of a strain hardening curve using the Instron-8850 complex. The results of the ratio of basic geometric dimensions expanded the range of flange parts under investigation and allowed us to consider angular rolling technology with a variable angle of inclination of the rolling roll from a three-stage perspective, especially in small-scale production.

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Use of Directional Solidification for Improving Tubular Workpiece Quality of Different Cast Irons

Cited by 6 publications

References 3 publications

Influence of the Material Structure and Properties on the Wear Resistance of Gears with Different Geometries

Influence of the Material Structure and Properties on the Wear Resistance of Gears with Different Geometries

Influence of Structural Parameters of Cutting Ceramics on Quality of Processing of Machine Slideways of Metal-Cutting Equipment in Selective Formation of Instrumentation

Angular Rolling of the Hollow Flanges of Pipe Joints

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