Grinding

About: Grinding is a research topic. Over the lifetime, 97566 publications have been published within this topic receiving 461678 citations.

Grinding Technology: Theory and Applications of Machining with Abrasives

Abstract: This comprehensive, self-contained work brings to the reader what is known to date about grinding and how that knowledge can be translated into exceptional precision in part manufacturing. Structured to educate as well as serve as a shop-floor reference, the book bridges the gap between theory and application, presenting a critical and unified picture of the grinding process and how its use brings part quality in harmony with customer expectations.

The effect of surface grinding and sandblasting on flexural strength and reliability of Y-TZP zirconia ceramic.

Abstract: Objectives: This study was conducted to evaluate the effect of grinding and sandblasting on the microstructure, biaxial flexural strength and reliability of two yttria stabilized tetragonal zirconia (Y-TZP) ceramics. Methods: Two Y-TZP powders were used to produce fine grained and coarse grained microstructures. Sixty discs from each material were randomly divided into six groups of ten. For each group a different surface treatment was applied: dry grinding, wet grinding, sandblasting, dry grinding+sandblasting, sandblasting+dry grinding and a control group. Biaxial flexural strength was determined and data were analyzed using one-way ANOVA, followed by Tukey's HSD test (p . In addition, Weibull statistics was used to analyze the variability of flexural strength. The relative amount of transformed monoclinic zirconia, corresponding transformed zone depth (TZD) and the mean critical defect size ccr were calculated. Results: There was no difference in mean strength between the as sintered fine and coarse grained Y-TZP. Significant differences (p were found between the control group and ground fine grained material for both wet and dry grinding. Sandblasting significantly increased the strength in fine and coarse grained materials. All surface treatment procedures reduced the Weibull modulus of Y-TZP. For both materials, the highest amount of the monoclinic phase and the largest TZD was found after sandblasting. Lower amounts of the monoclinic phase were obtained after both grinding procedures, where the highest mean critical defect size ccr was also calculated. Significance: Our results indicate that sandblasting may provide a powerful technique for strengthening Y-TZP in clinical practice. In contrast, grinding may lead to substantial strength degradation and reduced reliability of prefabricated zirconia elements, therefore, sandblasting of ground surfaces is suggested.

Chatter Stability of Metal Cutting and Grinding

Abstract: This paper reviews fundamental modeling of chatter vibrations in metal cutting and grinding processes. The avoidance of chatter vibrations in industry is also presented. The fundamentals of orthogonal chatter stability law and lobes are reviewed for single point machining operations where the process is one dimensional and time invariant. The application of orthogonal stability to turning and boring operations is presented while discussing the process nonlinearities that make the solution difficult in frequency domain. Modeling of drilling vibrations is discussed. The dynamic modeling and chatter stability of milling is presented. Various stability models are compared against experimentally validated time domain simulation model results. The dynamic time domain model of transverse and plunge grinding operations is presented with experimental results. Off-line and real-time chatter suppression techniques are summarized along with their practical applications and limitations in industry. The paper presents a series of research topics, which have yet to be studied for effective use of chatter prediction and suppression techniques in industry.

Metal Cutting Theory and Practice

Abstract: INTRODUCTION Scope of the Subject Historical Development Types of Production References METAL CUTTING OPERATIONS Introduction Turning Boring Drilling Reaming Milling Planing and Shaping Broaching Tapping and Threading Grinding and Related Abrasive Processes Roller Burnishing Deburring Examples Problems References MACHINE TOOLS Introduction Production Machine Tools CNC Machine Tools and Cellular Manufacturing Systems Machine Tool Structures Slides and Guideways Axis Drives Spindles Coolant Systems Tool Changing Systems Examples References CUTTING TOOLS Introduction Cutting Tool Materials Tool Coatings Basic Types of Cutting Tools Turning Tools Boring Tools Milling Tools Drilling Tools Reamers Threading Tools Grinding Wheels Microsizing and Honing Tools Burnishing Tools Examples Problems References TOOLHOLDERS AND WORKHOLDERS Introduction Toolholding Systems Toolholder/Spindle Connections Cutting Tool Clamping Systems Balancing Requirements for Toolholders Fixtures Examples Problems References MECHANICS OF CUTTING Introduction Measurement of Cutting Forces and Chip Thickness Force Components Empirical Force Models Specific Cutting Power Chip Formation and Primary Plastic Deformation Tool-Chip Friction and Secondary Deformation Shear Plane and Slip Line Theories for Continuous Chip Formation Shear Plane Models for Oblique Cutting Shear Zone Models Minimum Work and Uniqueness Assumptions Finite Element Models Discontinuous Chip Formation Built-up Edge Formation Examples Problems References CUTTING TEMPERATURES Introduction Measurement of Cutting Temperatures Factors Affecting Cutting Temperatures Analytical Models for Steady-State Temperatures Finite Element and Other Numerical Models Temperatures in Interrupted Cutting Temperatures in Drilling Thermal Expansion Examples Problems References MACHINING PROCESS ANALYSIS Introduction Turning Boring Milling Drilling Force Equations and Baseline Data Process Simulation Examples Finite Element Analysis for Clamping, Fixturing, and Workpiece Distortion Applications Finite Element Application Examples Examples Problems References TOOL WEAR AND TOOL LIFE Introduction Types of Tool Wear Measurement of Tool Wear Tool Wear Mechanisms Tool Wear--Material Considerations Tool Life Testing Tool Life Equations Prediction of Tool Wear Rates Tool Fracture and Edge Chipping Drill Wear and Breakage Thermal Cracking and Tool Fracture in Milling Tool Wear Monitoring Examples Problems References SURFACE FINISH AND INTEGRITY Introduction Measurement of Surface Finish Surface Finish in Turning and Boring Surface Finish in Milling Surface Finish in Drilling and Reaming Surface Finish in Grinding Residual Stresses in Machined Surfaces White Layer Formation Surface Burn in Grinding Examples Problems References MACHINABILITY OF MATERIALS Introduction Machinability Criteria, Tests, and Indices Chip Control Burr Formation and Control Machinability of Engineering Materials References MACHINING DYNAMICS Introduction Vibration Analysis Methods Vibration of Discrete (Lumped Mass) Systems Types of Machine Tool Vibration Forced Vibration Self-Excited Vibrations (Chatter) Chatter Prediction Vibration Control Active Vibration Control Examples References MACHINING ECONOMICS AND OPTIMIZATION Introduction Role of a Computerized Optimization System Economic Considerations Optimization of Manufacturing Systems--Basic Factors Optimization of Machining Conditions Formulation of the Optimization Problem Optimization Techniques Numerical Examples Problems References CUTTING FLUIDS Introduction Types of Cutting Fluids Coolant Application Filtering Condition Monitoring and Waste Treatment Health and Safety Concerns Dry and Near-Dry Machining Methods Test Procedure for Cutting Fluid Evaluation References HIGH THROUGHPUT AND AGILE MACHINING Introduction High Throughput Machining Agile Machining Systems Tooling and Fixturing Materials Handling Systems References DESIGN FOR MACHINING Introduction Machining Costs General Design for Machining Rules Special Considerations for Specific Types of Equipment and Operations CAPP and DFM Programs Examples References INDEX