Study of the working face of a flexible grinding tool

Lyukshin, Vladimir; Shatko, Dmitry B.; Strelnikov, Pavel

doi:10.1088/1757-899x/734/1/012068

Cited by 3 publications

(2 citation statements)

References 3 publications

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“…ри зачистке достаточно большой номенклатуры деталей успешно применяются абразивные лепестковые круги [1][2][3][4][5][6]. Такой круг прямого профиля представляет собой набор лепестков абразивной шкурки, закрепленных под углом к радиальному направлению на наружной поверхности втулки.…”

Section: Introductionunclassified

Features of Machine Grinding of Surfaces with a Flap Wheel

Starodubtseva¹,

Koltsov²,

Vinh³

et al. 2022

Vestnik IzhGTU imeni M.T. Kalashnikova

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In order to obtain the necessary shape of long panels and sheaths, the aircraft industry successfully uses a complex technology of shaping. Grinding, as an operation in a complex technological process, is provided after the operation of shot-peen forming before hardening. It is designed to ensure that the roughness and final aerodynamic shape of the surface meet the requirements established by the drawing of the part. To implement this technology, a special installation UDF-4 (shot-impact forming unit) was designed and manufactured at the Irkutsk National Research Technical University. The version of this installation was equipped with a CNC system and a revolver stripping head with 4-flap wheels. The possibility of choosing the necessary flap wheels in the process of grinding, depending on the curvature and width of the treated surface, significantly expanded the technological capabilities of the installation. The elastic abrasive flap wheels of a straight profile used in production have proven themselves well both in terms of grinding performance and tool durability. However, practice has shown that due to the complex impact of abrasive petals during contact with the treated surface, a special zone of uneven impact along the length of the contact of the petals is formed during grinding. The results of experimental studies have shown that the roughness of the treated surface is significantly improved when the direction of movement of the flap wheels feed in the contact zone is changed from oncoming to passing. The paper presents experimental data on studies of changes in surface roughness in the contact zone with the abrasive flap wheels during grinding, depending on the processing modes, as well as the results of an experimental study of the quality of the treated surface with counter and passing feed.

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Section: Introductionunclassified

Features of Machine Grinding of Surfaces with a Flap Wheel

Starodubtseva¹,

Koltsov²,

Vinh³

et al. 2022

Vestnik IzhGTU imeni M.T. Kalashnikova

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“…Belt grinding occupies a special place in abrasive machining. In terms of kinematics, dynamics, and their accompanying physical phenomena, this type of machining occupies an intermediate position between grinding with “rough” wheels (i.e., nearly undeformable) and machining with loose abrasive grains [ 30 , 31 , 32 ].…”

Section: Introductionmentioning

confidence: 99%

A Study on the Machinability of Steels and Alloys to Develop Recommendations for Setting Tool Performance Characteristics and Belt Grinding Modes

et al. 2020

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This article presents a methodology for designing belt grinding operations with grinding and lapping machines. It provides the results of a study on the machinability of various steels and alloys with belt grinding, which are then classified according to an indicator that we have developed. Namely, cast aluminum alloys, structural alloy steels, structural carbon steels, corrosion-resistant and heat-resistant stainless steels, and heat-resistant nickel alloys have been investigated. The machinability index is the ratio of the performance indicators of the grinding belt and the depth of cut to the indicators of grade 45 structural carbon steels (similar to steel AISI 1045) and similar steels and alloys. The performance indicators of the grinding belt are chosen from a set of calculated and estimated indicators. Experimentally determining the dependences of the performance indicators on the belt grinding modes and conditions, taking into account the established levels of machinability, allowed us to develop recommendations for designing belt grinding operations with grinding and lapping machines. The proposed methodology for designing belt grinding operations guarantees optimal performance and ensures that the necessary quality of the machinable surfaces is achieved. At the same time, it takes into account variable machining conditions, which change within specified limits.

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Simulating residual stresses formed in the technological sequence of shot-impact treatment–flap-wheel trimming

Le,

Koltsov,

Starodubtseva

2024

jour

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The paper aims to study the stress-strain state of the surface layer in a VT95 aluminum alloy part during its shot-impact treatment in the sequence of “shot-impact treatment–flap-wheel trimming” operations. The research objects included large parts, such as panels and cladding of complex shapes used in aircraft, missile, and shipbuilding industries. Computer simulation in the Ansys Workbench 19.0 software package was used to develop a methodology for determining residual stresses. As a result of simulating the studied treatment sequence, a visual representation of the residual stress formation pattern, as well as physical values and distribution curves of residual stresses, were obtained. The distribution pattern of residual stresses after performing two types of treatment was established to be similar. The maximum value of residual stresses, obtained as a result of performing a shot-impact treatment of the part surface with a shot of 3.0 mm in diameter at a shot-impact rate of 25 m/s, reaches about 600 MPa at a depth of 1.0 mm. Following the shot-impact treatment, flap-wheel trimming is performed in the finite element simulation as a set of abrasive grains at a rate of 18.316 m/s. The removal of the 25-, 50-, and 75-μm layer from the surface of the plate during trimming contributes to the shearing of the upper part in the residual stress diagram and, as a result, to a decrease in the values of residual stresses in the shot-impact treatment–flap-wheel trimming sequence to 400 MPa. In addition, along with an increase in the thickness of the layer removed from the surface during trimming, the value of residual stresses decreases more slowly. In this case, the thickness of the removed layer causes no effect on the depth of residual compression stresses (about 0.7 mm). The developed finite element model makes it possible to predict and control the level and magnitude of residual stresses in an aluminum alloy sample at the stage of its preparation for both a shot-impact treatment operation and the combination of shotimpact treatment and flap-wheel trimming.

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Study of the working face of a flexible grinding tool

Cited by 3 publications

References 3 publications

Features of Machine Grinding of Surfaces with a Flap Wheel

Features of Machine Grinding of Surfaces with a Flap Wheel

A Study on the Machinability of Steels and Alloys to Develop Recommendations for Setting Tool Performance Characteristics and Belt Grinding Modes

Simulating residual stresses formed in the technological sequence of shot-impact treatment–flap-wheel trimming

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