The Influence of the Depth of Grinding on the Condition of the Surface Layer of 20MnCr5 Steel Ground with the Minimum Quantity Lubrication (MQL) Method

Stachurski, Wojciech; Sawicki, J.; Januszewicz, Bartłomiej; Rosik, Radosław

doi:10.3390/ma15041336

Cited by 12 publications

(2 citation statements)

References 41 publications

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“…The increase in V f leads to an increase in both normal and tangential forces, which are positively correlated. The increase in the linear speed of the grinding wheel reduces the a gmax , thereby reducing the grinding force [16]. As the workpiece speed increases, both a gmax and material removal rate increase, resulting in an increase in F x and F z .…”

Section: Grinding Forcementioning

confidence: 99%

Analysis of Grindability and Surface Integrity in Creep-Feed Grinding of High-Strength Steels

Yin,

Chen

2024

Materials

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Creep−feed grinding of high−strength steel is prone to excessive wheel wear and thermal damage defects, which seriously affects the service performance of parts. To solve the above−−mentioned issue, a creep−feed grinding test was carried out on high−strength steel using SG and CBN abrasive wheels. The grindability of high−strength steel was scrutinized in terms of grinding force, machining temperature and grinding specific energy. Moreover, the effects of operation parameters and grinder performances on the surface integrity of the workpiece such as surface morphology, roughness, residual stress and hardness were rigorously studied. The results indicate that, when the instantaneous high temperature in the grinding area reaches above the phase transition temperature of the steel, the local organization of the surface layer changes, leading to thermal damage defects in the components. The outstanding hardness and thermal conductivity of CBN abrasives are more productive in suppressing grinding burns than the high self−sharpening properties of SG grits and a more favorable machining response is achieved. The effects of thermal damage on the surface integrity of high−strength steel grinding are mainly in the form of oxidative discoloration, coating texture, hardness reduction and residual tensile stresses. Within the parameter range of this experiment, CBN grinding wheel reduces grinding specific energy by about 33% compared to SG grinding wheel and can control surface roughness below 0.8 µm. The weight of oxygen element in the burn−out workpiece accounts for 21%, and the thickness of the metamorphic layer is about 40 µm. The essential means of achieving burn−free grinding of high−strength steels is to reduce heat generation and enhance heat evacuation. The results obtained can provide technical guidance for high−quality processing of high−strength steel and precision manufacturing of high−end components.

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Section: Grinding Forcementioning

confidence: 99%

Analysis of Grindability and Surface Integrity in Creep-Feed Grinding of High-Strength Steels

Yin,

Chen

2024

Materials

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“…Grinding is a commonly used finishing process for hardened workpieces that enables the achievement of high dimensional and shape accuracy, low surface roughness, and favorable compressive stresses in the surface layer of the workpiece [1,2]. In order to achieve the desired grinding results, it is necessary to ensure the right machining conditions, properly selecting all input quantities affecting the grinding process.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Influence of the Cooling Method Used During Grinding on the Operating Properties of Ceramic Grinding Wheels Made with Different Abrasives

Stachurski¹,

Dębkowski²,

Rosik³

et al. 2023

Adv. Sci. Technol. Res. J.

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This article presents the results of a study of the performance characteristics of ceramic grinding wheels during peripheral grinding of flat surfaces carried out using different methods of supplying cooling and lubricating fluid (coolant). In the study, T1 type grinding wheels were used, differing in the type of abrasive used in their construction. The abrasive consisted of mixtures with different volume percentages of: 1) grains of conventional white electro-corundum, 2) grains of submicrocrystalline sintered corundum produced by sol-gel technology, 3) microcrystalline sintered ceramic grains with RECERAMAX™ RT microclasters from RECKEL. Specimens made of 145Cr6 tool steel (60±1 HRC) were ground using coolant feeding by flood method and MQL (Minimum Quantity Lubrication) method. During the study, the components of grinding force (F n , F t ), radial loss of the grinding wheel and roughness of the ground surface were measured, which made it possible to determine the volumetric wear of the grinding wheel V s , the total grinding power P, and then calculate the grinding indicators G and K s . The obtained values of the G index indicate that, regardless of the type of grinding wheel used, a higher relative grinding efficiency was obtained during grinding with the delivery of coolant by the MQL method. The highest values of this index were obtained in the case of the grinding process carried out with a grinding wheel containing RECERAMAX™ RT abrasive. The K s index confirmed the best performance of the mentioned grinding wheel. Since its value also depends on the total grinding power P and the surface roughness parameter Ra, the grinding process carried out with this grinding wheel is additionally characterized by a better quality of the obtained surface and lower energy consumption.

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Determination of the Grinding Headstock Surface Temperature, Which Varies Depending on the Process Fluids Thermal State

Stepanov,

Litovchenko,

Tretyak

et al. 2024

Lecture Notes in Mechanical Engineering

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The Influence of the Depth of Grinding on the Condition of the Surface Layer of 20MnCr5 Steel Ground with the Minimum Quantity Lubrication (MQL) Method

Cited by 12 publications

References 41 publications

Analysis of Grindability and Surface Integrity in Creep-Feed Grinding of High-Strength Steels

Analysis of Grindability and Surface Integrity in Creep-Feed Grinding of High-Strength Steels

Evaluation of the Influence of the Cooling Method Used During Grinding on the Operating Properties of Ceramic Grinding Wheels Made with Different Abrasives

Determination of the Grinding Headstock Surface Temperature, Which Varies Depending on the Process Fluids Thermal State

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