Machinist Grinder
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Machining Online Manufacturing Training
MACHINING ONLINE MANUFACTURING TRAINING MACHINING FUNDAMENTALS 5S Overview Cutting Processes Hole Standards and Inspection Math: Fractions and Decimals Thread Standards and Inspection Band Saw Operation Essentials of Heat Treatment of Steel Intro to OSHA Metal Cutting Fluid Safety Trigonometry: Sine, Cosine, Tangent Basic Cutting Theory Ferrous Metals Introduction to Mechanical Properties Noise Reduction/Hearing Conservation Units of Measurement Basic Measurement Fire Safety and Prevention Introduction to Metal Cutting Fluids Overview of Machine Tools Walking and Working Surfaces Basics of Tolerance Geometry: Circles and Polygons ISO 9001: 2015 Review Personal Protective Equipment Bloodborne Pathogens Geometry: Lines and Angles Lean Manufacturing Overview Powered Industrial Truck Safety Blueprint Reading Geometry: Triangles Lockout/Tagout Procedures Safety for Lifting Devices Calibration Fundamentals Hand and Power Tool Safety Math Fundamentals SDS and Hazard Communication GRINDING TECH Basic Grinding Theory Cylindrical Grinder Operation Grinding Variables Major Rules of GD&T Supporting and Locating Principles Basics of G Code Programming Dressing and Truing Grinding Wheel Geometry Metrics for Lean Surface Grinder Operation Basics of the Centerless Grinder Essentials of Communication Grinding Wheel Materials Process Flow Charting Surface Texture and Inspection Basics of the Cylindrical Grinder Essentials of Leadership Intro to Fastener Threads Setup for the Centerless Grinder Troubleshooting Basics of the Surface Grinder Grinding Ferrous -
Controls the Rotation and Longitudinal Motion of the Workpiece
CHAPTER 2- ABRASIVE GRINDING PROCESSES. LEARNING OBJECTIVES D Understand the types of different grinding machines D Techniques of grinding D Various application of grinding machines -------------------------------------------------------------------------------------------------------------------- Classification of Grinding Processes. Grinding machines can be best classified according to the type of surfaces they are used to produce. In order to bring the job to the required shape, size and surface finish the surplus stock is removed either by feeding the job against the revolving wheel or by forcing the revolving wheel against the job. Conventional grinding machines can be broadly classified as Surface grinding machine Cylindrical grinding machine Internal grinding machine Tool and cutter grinding machine SURFACE GRINDING MACHINE Basically there are four different types of surface grinding machines characterised by the movement of their tables and the orientation of grinding wheel spindles as follows: Horizontal spindle & reciprocating table Vertical spindle & reciprocating table Horizontal spindle & rotary table Vertical spindle & rotary table Figure 1: Horizontal spindle and reciprocating table Complied by: Jagdeesha T, Assistant Professor, Mech Engg Dept., National Institute of Technology, Calicut Figure 2: a) Transverse Grinding b) Plunge Grinding Vertical Spindle reciprocating table grinder This grinding machine with all working motions is shown in Fig. 3a. The grinding operation is similar to that of face milling on a vertical milling machine. In this machine a cup shaped wheel grinds the workpiece over its full width using end face of the wheel as shown in Fig 3b. This brings more grits in action at the same time and consequently a higher material removal rate may be attained than for grinding with a peripheral wheel. -
Manufacturing Glossary
MANUFACTURING GLOSSARY Aging – A change in the properties of certain metals and alloys that occurs at ambient or moderately elevated temperatures after a hot-working operation or a heat-treatment (quench aging in ferrous alloys, natural or artificial aging in ferrous and nonferrous alloys) or after a cold-working operation (strain aging). The change in properties is often, but not always, due to a phase change (precipitation), but never involves a change in chemical composition of the metal or alloy. Abrasive – Garnet, emery, carborundum, aluminum oxide, silicon carbide, diamond, cubic boron nitride, or other material in various grit sizes used for grinding, lapping, polishing, honing, pressure blasting, and other operations. Each abrasive particle acts like a tiny, single-point tool that cuts a small chip; with hundreds of thousands of points doing so, high metal-removal rates are possible while providing a good finish. Abrasive Band – Diamond- or other abrasive-coated endless band fitted to a special band machine for machining hard-to-cut materials. Abrasive Belt – Abrasive-coated belt used for production finishing, deburring, and similar functions.See coated abrasive. Abrasive Cutoff Disc – Blade-like disc with abrasive particles that parts stock in a slicing motion. Abrasive Cutoff Machine, Saw – Machine that uses blade-like discs impregnated with abrasive particles to cut/part stock. See saw, sawing machine. Abrasive Flow Machining – Finishing operation for holes, inaccessible areas, or restricted passages. Done by clamping the part in a fixture, then extruding semisolid abrasive media through the passage. Often, multiple parts are loaded into a single fixture and finished simultaneously. Abrasive Machining – Various grinding, honing, lapping, and polishing operations that utilize abrasive particles to impart new shapes, improve finishes, and part stock by removing metal or other material.See grinding. -
5.1 GRINDING Definitions
UNIT-V GRINDING AND BROACHING 5.1 Grinding Definitions Cutting conditions in grinding Wheel wear Surface finish and effects of cutting temperature Grinding wheel Grinding operations Finishing Processes Introduction Finishing processes 5.1 GRINDING Definitions Abrasive machining is a material removal process that involves the use of abrasive cutting tools. There are three principle types of abrasive cutting tools according to the degree to which abrasive grains are constrained, bonded abrasive tools: abrasive grains are closely packed into different shapes, the most common is the abrasive wheel. Grains are held together by bonding material. Abrasive machining process that use bonded abrasives include grinding, honing, superfinishing; coated abrasive tools: abrasive grains are glued onto a flexible cloth, paper or resin backing. Coated abrasives are available in sheets, rolls, endless belts. Processes include abrasive belt grinding, abrasive wire cutting; free abrasives: abrasive grains are not bonded or glued. Instead, they are introduced either in oil-based fluids (lapping, ultrasonic machining), or in water (abrasive water jet cutting) or air (abrasive jet machining), or contained in a semisoft binder (buffing). Regardless the form of the abrasive tool and machining operation considered, all abrasive operations can be considered as material removal processes with geometrically undefined cutting edges, a concept illustrated in the figure: The concept of undefined cutting edge in abrasive machining. Grinding Abrasive machining can be likened to the other machining operations with multipoint cutting tools. Each abrasive grain acts like a small single cutting tool with undefined geometry but usually with high negative rake angle. Abrasive machining involves a number of operations, used to achieve ultimate dimensional precision and surface finish. -
Skilled Trades Sector Brochure
Architectural Glass and Metal Hoisting Engineer - Tower Crane Bearings Mechanic Mould Maker Technician (Glazier) Operator (Tower Crane Operator) Blacksmith Mould or Die Finisher Brick and Stone Mason (Bricklayer) Ironworker - Generalist Cabinetmaker Optics Technician (Lens and Prism Cement (Concrete) Finisher Ironworker - Structural and Composite Structures Technician Maker) Concrete Pump Operator Ornamental Computer Numerical Control (CNC) Packaging Machine Mechanic Construction Boilermaker Native Residential Construction Worker Programmer Pattern Maker (Boilermaker) Painter and Decorator - Commercial and Die Designer Precision Metal Fabricator Construction Craft Worker Residential (Painter and Decorator) Draftsperson - Mechanical Pressure Systems Welder Construction Millwright Painter and Decorator - Industrial Draftsperson - Plastic Mould Design Process Operator - Food Drywall Finisher and Plasterer Plumber Draftsperson - Tool and Die Design Manufacturing Drywall, Acoustic and Lathing Powerline Technician Electric Motor System Technician Process Operator - Power Applicator (Lather – Interior Systems Precast Concrete Erector Electrical Control (Machine) Builder Process Operator - Refinery, Mechanic) Precast Concrete Finisher Electrician (Signal Maintenance) Chemical and Liquid Processes Electrician — Construction and Refractory Mason Elevating Devices Mechanic Process Operator - Wood Products Maintenance Refrigeration and Air Conditioning Entertainment Industry Power Technician Pump Systems Installer Electrician — Domestic and Rural -
Grinding Machine Construction Types of Grinders
Grinding machine A grinding machine is a machine tool used for producing very fine finishes or making very light cuts, using an abrasive wheel as the cutting device. This wheel can be made up of various sizes and types of stones, diamonds or of inorganic materials. For machines used to reduce particle size in materials processing see grinding. Construction The grinding machine consists of a power driven grinding wheel spinning at the required speed (which is determined by the wheel’s diameter and manufacturer’s rating, usually by a formula) and a bed with a fixture to guide and hold the work-piece. The grinding head can be controlled to travel across a fixed work piece or the workpiece can be moved whilst the grind head stays in a fixed position. Very fine control of the grinding head or tables position is possible using a vernier calibrated hand wheel, or using the features of NC or CNC controls. Grinding machines remove material from the workpiece by abrasion, which can generate substantial amounts of heat; they therefore incorporate a coolant to cool the workpiece so that it does not overheat and go outside its tolerance. The coolant also benefits the machinist as the heat generated may cause burns in some cases. In very high-precision grinding machines (most cylindrical and surface grinders) the final grinding stages are usually set up so that they remove about 2/10000mm (less than 1/100000 in) per pass - this generates so little heat that even with no coolant, the temperature rise is negligible. Types of grinders These machines include the Belt grinder, which is usually used as a machining method to process metals and other materials, with the aid of coated abrasives. -
Types of Grinding Wheels
GRINDING Abrasive process Metal is removed with the help of ROTATING GRINDING WHEEL Wheels are made of fine grains of abrasive materials held together by a bonding material called a BOND Types of operations performed in cylindrical grinding 1. TRAVERSE GRINDING 2. PLUNGE GRINDING GRINDING MACHINES Conventional grinding machines can be broadly classified as: (a) Surface grinding machine (b) Cylindrical grinding machine (c) Internal grinding machine (d) Tool and cutter grinding machine HORIZONTAL GRINDING • Full depth and stock is removed with one or two passes at low work speed • Very high forces are generated • High rigidity and power CYLINDRICAL GRINDING SURFACE GRINDING CENRELESS GRINDING Surface grinding machine Machine may be similar to a milling machine used mainly to grind flat surface Basically there are four different types of surface grinding machines characterized by the movement of their tables and the orientation of grinding wheel spindles • Horizontal spindle and reciprocating table • Vertical spindle and reciprocating table • Horizontal spindle and rotary table • Vertical spindle and rotary table Horizontal spindle reciprocating table surface grinder Surface grinding (a) traverse grinding (b) plunge grinding Vertical spindle reciprocating Surface grinding in Vertical spindle table surface grinder reciprocating table surface grinder Cylindrical grinding machine This machine is used to produce external cylindrical surface. Surfaces may be straight, tapered, steps or profiled. Broadly there are three different types of cylindrical grinding machine as follows: 1. Plain centre type cylindrical grinder 2. Universal cylindrical surface grinder 3. Centreless cylindrical surface grinder Plain centre type cylindrical grinder Classification of Grinding Machines TYPES OF GRINDING WHEELS Straight Wheel These are generally used for cylindrical, internal, centreless and surface grinding operations. -
MSL Engineering Limited Platinum Blue House 1St Floor, 18 the Avenue Egham, Surrey, TW20 9AB
SMR Final Report 121404 Purpose of Issue Rev Date of Issue Author Agreed Approved Issued for information 0 Aug 2004 SM Issued for internal comment 1 November 2004 AFD DJM JB Issued as Final Report 2 December 2004 AFD DJM JB This Final report has been reviewed and approved by the Mineral Management Service. Approval does not signify that the contents necessarily reflect the views and policies of the Service, nor does mention of trade names or commercial products constitute endorsement or recommendation for use. This study was funded by the Mineral Management Service, U.S. Department of the Interior, Washington, D.C., under Contract Number 1435-01-04-CT-35320 ASSESSMENT OF REPAIR TECHNIQUES FOR AGEING OR DAMAGED STRUCTURES Project #502 DOC REF C357R001 Rev 1 NOV 2004 MSL Engineering Limited Platinum Blue House 1st Floor, 18 The Avenue Egham, Surrey, TW20 9AB Tel: +44 (0)1784 439194 Fax: +44 (0)1784 439198 E-mail: [email protected] C357R001Rev 2, December 2004 MMS Project #502 NUMBER DETAILS OF REVISION 0 Issued for information, August 2004 1 Issued for comment, November 2004. Extensive revisions throughout, including restructuring of report. 2 Issued as Final Report, December 2004. Conversion table added, Figure showing clamp details to avoid added, and general editorial revisions. C357R001Rev 2, December 2004 MMS Project #502 Assessment of Repair Techniques for Ageing or Damaged Structures By Dr. Adrian F Dier MSL Services Corporation Final Project Report: ASSESSMENT OF REPAIR TECHNIQUES FOR AGEING OR DAMAGED STRUCTURES MMS Project Number 502 November 2004 C357R001Rev 2, December 2004 i This Final report has been reviewed a nd approved by the Mineral Management Service. -
CNC Grinding [email protected]
Developing The “Sweet Spot” In Grinding By Steven Kendjelic CNC Grinding [email protected] - 1 - Preface Various methods have been employed in the effort to grind difficult to machine materials. The milling and broaching process’s generated high tooling costs and required secondary operations to remove burrs. Surface grinding while an accurate process, was slow and did not always provide a feasible cycle time. With the small incremental infeed and limited part cooling, thermal damage resulted when material removal rates were increased. In Electro Chemical Grinding (ECG), the electric current passing from the wheel (cathode) to the work piece (anode) removes material 80% by electrolytic action and the other 20% through mechanical action using an abrasive wheel. While the material removal rates are as much as 60% faster than surface grinding the economic costs of electrolyte and disposal usually make this the non-preferred method. Similarly, Electro Chemical Discharge Grinding (ECDG) follows the same basic principles, however, the abrasive grinding wheel is replaced by a graphite wheel. Both processes permit low machining temperatures and forces used on hard materials with minimal burrs. This process is limited, however, to tolerances of +/- .002 in. or more while the edge of the work piece features edge degradation. Recently the author has used a steel core, direct plated uncoated Cubic Boron Nitride grain in the ECG process, which eliminated the form-dressing requirements. Nonetheless, closer part tolerances will require true grinding operations. Electro Chemical Machining has also been experimented with for dressing metal bond grinding wheels. In a conventional production grinding application the dressing of the wheel requires a dedicated off line electro chemical machining station due to the process requirements and electrolyte solution. -
Professional Profiles | Cutting Tool Engineering | April 2015
Professional profiles | Cutting Tool Engineering | April 2015 http://www.ctemag.com/aa_pages/2015/150404-ToolGrinding.html April 2015 / Volume 67 / Issue 4 Professional profiles By Evan Jones Thorne, Assistant Editor Grinding a complex cutting tool can be, well, complex. And defining what makes a cutting tool complex can be challenging too. “A complex cutting tool is generally defined by the tool profile and its tolerances,” said Paul Ehrlich, senior applications engineer for grinding machine builder United Grinding North America Inc., Miamisburg, Ohio. “You really need to take both of those parameters into consideration, because you might have a wide open geometry with a tolerance of two or three thousandths, and that’s not a big deal, but an odd shape, even with a looser tolerance, would be complex.” The Walter Helitronic Vision grinding machine produces rotationally symmetrical tools and parts with complex 1 of 7 4/8/2015 8:57 AM Professional profiles | Cutting Tool Engineering | April 2015 http://www.ctemag.com/aa_pages/2015/150404-ToolGrinding.html geometries. Image courtesy United Grinding North America. Bill Freese, president of grinding machine builder Rush Machinery Inc., Rushville, N.Y., concurred, adding that multifunction tools, which may feature geometries intended to serve multiple purposes, are also complex. Toolmaker and machine tool builder Star Cutter Co., Farmington Hills, Mich., expands the definition of complex to encompass anything outside of its normal range, noted Paul Schulte, manager of advanced technology. “We view ‘complex’ as a tool with more than one diameter or a tolerance that is tighter than our off-the-shelf products,” he explained. -
Skillpoint Technical Training Course Catalog
Course Catalog advancedtech.com advancedtech.com 1 The Ultimate Training Solution: Comprehensive, Customizable and Convenient. SkillPoint™ Technical Training from Advanced Technology Services (ATS) provides a flexible solution to your maintenance training needs. With offerings ranging from introductory wiring to advanced PLC networks, SkillPoint has a full line of online and hands-on programs. Assessment Our process helps you validate skill gaps and then identify where to start and how to best invest in employee development. Consultation SkillPoint assessment findings are used to customize a flexible training strategy that addresses your organization’s needs. Online Courses Develop a solid foundation of knowledge so your staff gets the skills they need and you get the best long-term results. Hands-On Courses Eliminate travel costs by bringing training station equipment and a SkillPoint instructor to your operation. Courses are completely customizable and suited to your schedule. Results Training can increase productivity, reduce equipment failures, develop technician independence, improve retention and job satisfaction. Safety Boost technician confidence and improve the overall safety of your facility. Training can save lives. 2 advancedtech.com Assessment Find out where to start and how to best invest in employee development. Our validated gap analysis offers high level insight of organizational and individual needs. • SkillPoint Assessment: 100 question proctored exam for each technician • Site Tour: Plant, process and equipment details for customized prescriptive solution • Interview Process: Discussion of pain points, key metrics and interpretations of workforce Understanding how to ‘move the dial’ through employee development is more complex than knowing your critical equipment list, identifying your leading contributors to downtime and surveying the skills gap interpretations of your staff. -
Grinding Machines: (14 Metal Buildup:And (15) the (Shipboard) Repair Department and Repair Work
DOCUMENT RESUME ED 203 130 CE 029 243 AUTHOR Bynum, Michael H.: Taylor, Edward A. TITLE Machinery Repairman 3 6 2. Rate TrainingManual and Nonresident Career Course. Revised. INSTITUTION Naval Education and Training Command,Washington, D.C. REPORT NO NAVEDTRA-10530-E PUB DATE 81 NOTE 671p.: Photographs andsome diagrams will not reproduce well. EDRS PRICE MF03/PC27 Plus Postage. DESCRIPTORS Behavioral Objectives; CorrespondenceStudy; *Equipment Maintenance: Rand Tools;Independent Study: Instructional Materials: LearningActivities: Machine Repairers: *Machine Tools;*Mechanics (Process): Military Training: Postsecondary Education: *Repair: Textbooks: *Tradeand Industrial Education IDENTIFIERS Navy ABSTRACT This Rate Training Manual (textbook)and Nonresident Career Course form a correspondence self-studypackage to teach the theoretical knowledge and mental skillsneeded by the Machinery Repairman Third Class and Second Class. The15 chapters in the textbook are (1)Scope of the Machinery Repairman Rating:(2) Toolrooms and Tools:(3) Layout and Benchwork: (4) Metals and Plastics:(51 Power Saws and Drilling Machines:(6) Offhand Grinding of Tools:(7) Lathes and Attachments:(8) Basic Engine Lathe Operations:(9) Advanced Engine Lathe Operations: (10)Turret Lathes and Turret Lathe Operations:(11) Milling Machines and Milling Operations:(121 Shapers, Planers, and Engravers: (13)Precision Grinding Machines: (14 Metal Buildup:and (15) The (Shipboard) Repair Department and Repair Work. Appendixesinclude Tabular Tnformation of Benefit to Machinery Repairman(23 tables), Formulas. for Spur Gearing, Formulas for DiametralPitch System, and Glossary. The Nonresident Career Course follows theindex. It contains T1 assignments, which are organized into thefollowing format: textbook assignment and learning objectives withrelated sets of teaching items to be answered. (YLB) *********************************************************************** Peproductions supplied by EDRSare the best that can be made from the original document.