Choice of the optimal configuration of modular reusable fixtures

Karpus, V. E.; Ivanov, Vitalii

doi:10.3103/s1068798x12030124

Cited by 29 publications

(6 citation statements)

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“…Fixtures considerably effect on the output of the competitive products, ensuring the steady state accuracy and quality of the work surfaces, sufficient stiffness of the technological system, flexibility of production and initial cost of the final product. It is confirmed by the percentage number of fixtures that makes 70-80% from the total quantity of tooling, 10-20% of the total cost of manufacturing system, 80-90% of the total time for production planning, 40% of the rejected parts after the machining due to imperfection fixture design, 70% of new fixtures are the modification of the existing [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 92%

Fundamental Approach for Analysis of Dynamic Characteristics of Fixtures

Іванов¹,

Pavlenko²

2018

EAI Endorsed Transactions on Industrial Networks and Intelligen

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Present work is aimed at research of locating and clamping process of prismatic parts in fixtures during the machining on drilling-milling-boring machines. The fundamental approach for developing mathematical modeling of the system "fixture -workpiece" has been proposed. It allows to determine critical frequencies of functional elements oscillations and amplitude-frequency response characteristics, as well as dynamic component of fixture deformations at operating frequency of the machining process. The developed mathematical model is evaluated by numerical calculations of spectrum of critical frequencies considering the stiffness of cutting tool. The further researches are directed on the development of the methodology of calculation of the system "fixture -workpiece" by computer means of numerous realization and development of practical recommendations regarding its use during fixture design.

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Section: Introductionmentioning

confidence: 92%

Fundamental Approach for Analysis of Dynamic Characteristics of Fixtures

Іванов¹,

Pavlenko²

2018

EAI Endorsed Transactions on Industrial Networks and Intelligen

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“…Surface roughness is affected by elastic and plastic deformations in the surface layer, cutting modes, stiffness of the technological system, shape, and condition of the cutting part of the tool [6], as well as the type of material being processed and friction between the treated surface, the fixture [7], and the tool [8,9].…”

Section: Literature Reviewmentioning

confidence: 99%

Influence of the Cutting Temperature on the Surface Layer Quality When Grinding Sintered Porous Materials

Zabolotnyi

Bozhko

Machado

et al. 2021

Lecture Notes in Mechanical Engineering

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One of the features of sintered materials is porosity. Depending on the application, this can be both a disadvantage and an advantage. The porosity geometry affects the propagation of heat during the grinding of the sintered material. An experimental study of the temperature in the cutting zone during the grinding of sintered porous materials was carried out. The relationship between the contact temperature in the cutting zone, the parameters of the cutting modes during grinding, and the porosity of the part is revealed. It was found that the use of process coolants is not always possible due to the presence of pores in the material. It is proved that the cutting temperature of porous materials is higher due to the deteriorated heat dissipation properties, but the cutting temperature does not affect the degree of compaction of the surface layers of the powder material. An adequate mathematical model is obtained, which describes the change of cutting temperature depending on the material's cutting depth, grinding speed, and porosity.

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“…Steels used for heat-deforming dies must have high mechanical properties [21] (strength and toughness) at elevated temperatures and high scale resistance and heat resistance, i.e., the ability to withstand repeated heating and cooling without the appearance of hot cracks [22]. Steels must also have high wear resistance and thermal conductivity for industrial heat transfer transmitted by the workpiece [23][24][25].…”

Section: Literature Reviewmentioning

confidence: 99%

Surface Strengthening Technology for Hammers of a Four-Die Forging Device

Говорун

Berladir

Gusak

2021

Lecture Notes in Mechanical Engineering

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Strengthening of the hammers of four-die forging devices is considered in this paper. During the manufacture of forgings of future details from high-quality and alloy steels, the hammers of four-die forging devices work in extreme conditions of shock-abrasive wear, which causes them to fail quickly. Various technological methods of their strengthening are applied to prolong the service life of the hammers. One of the promising ways of strengthening the details of forging and pressing equipment is surfacing technology. The existing method of strengthening the hammer's surface of radial forging machine by surfacing with electrodes OZSh-6 and its disadvantages is described. A new method of strengthening the hammer's working surface using a welding machine by flux-cored wire PP-NP-35X6M2 is proposed. It was found that when surfacing AISI L6 tool steel with this flux-cored wire, the hardness of the metal surface after surfacing increases to 53 HRC, and when moving inwards, the hardness decreases to 44 HRC, which indicates a soft and viscous structure that can withstand dynamic loads. There is also an increase in the strength and wear resistance of the detail's surface, which, when surfacing with flux-cored wire PP-NP-35H6M2, is greater than the base metal by 1.5 times. Experimental studies, which have been obtained on the structure, hardness, and wear resistance, confirmed the feasibility of replacing manual arc welding with automatic.

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Choice of the optimal configuration of modular reusable fixtures

Cited by 29 publications

References 0 publications

Fundamental Approach for Analysis of Dynamic Characteristics of Fixtures

Fundamental Approach for Analysis of Dynamic Characteristics of Fixtures

Influence of the Cutting Temperature on the Surface Layer Quality When Grinding Sintered Porous Materials

Surface Strengthening Technology for Hammers of a Four-Die Forging Device

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