Accessory spindles and special wheel shaping dressing add to the versatility of this reciprocating table version grinding machine Figure L 6 Vertical spindle grinding machines are often seen in large sizes Figure L 7 Cylindrical Grinders Cylindrical grinders are.
Surface Grinding Machines and Process Surface Grinding is a manufacturing process which moves or grinding wheel relative a surface in a plane while a grinding wheel contacts the surface and removes a minute amount of material such that a flat surface is created The term surface grinding designates any process which accurately processes or grinds a surface.
The versatility and wide application of the grinding processeshave led to the development of many types of grindingmachines Your shop will probably have two three or moreof the common types As a machinist you should be familiarwiththe manytypesofthese machine tools and theprocesses they perform Surface GrindersOne of the most common grinding machines is the surfacegrinder Types of surface grinders includeType I Horizontal spindle with reciprocating tableType II Horizontal spindle with rotary tableType III Vertical spindle with either reciprocating orrotary table.
Accessory spindles and special wheel shaping dressing addto the versatility of this reciprocating table versiongrinding machine Figure L 6 Vertical spindle grinding machines are often seen in large sizes Figure L 7 Cylindrical GrindersCylindrical grinders are used to grind the diameters of cylindricalworkpieces.
Types of cylindrical grinders include1 Center type2 Roll type3 Centerless4 Internal cylindrical5 Tool and cutterCenter Type Grinder The center type cylindrical grinder sometimes called a center grinder grinds the outsidediameter of a cylindrical workpiece mounted betweencenters Figure L 8 The workpiece is traversed past thegrinding wheel while being rotated from 50 to 100 sfpmagainst the rotation of the grinding wheel Figure L 9.
Swiveling the table allows conical shapes can be ground Thismachine is also used for plunge grinding in which the workand wheel are brought together without table traverse.
Steep conical shapes can be ground on the universalcylindrical grinder Figure L 10 Long slender workpiecescan be ground using a steady rest Figure L 11 The angular typecenter grinderFigureL 12can grindintoa shoulderFigureL 13and can formcylindricalgeometrybyusingwheelsFigureL 14accuratelydressedtoproducea mirrorimageoftheir form in the workpiece.
Cylindrical grinders with computer numerical controlCNC are being produced Figure L 15 that can performthe functions of the universal cylindrical grinder under programcontrol.
A commonthrough feed centerless grinding operation is the grinding ofwrist pins for automotive pistons Sometimes this centerlessgrinding operation is followed by a centerless lapping processutilizing the same principle but employing a much smallerabrasive grit size.
Accurate positioning of grinding wheels is possible with zero backlash through a precision ball screw anti friction slide and digital control Vertical tilting and horizontal swiveling mechanism of the spindle is operated conveniently through a special screw mechanism Through spindle.
Double disc grinding has always offered a highly productive and accurate means for machining to size parts with flat and parallel sides In this grinding method two opposed abrasive discs each mounted on its own spindle simultaneously grind opposite and parallel faces on workpieces traversed between them via any of several fixturingcarrier techniques.
We also perform drilling operation in lathe machine too but drill machine is made for this specific drill operations so where we need bulk of drilling operation we go for drilling machine A drilling machine is used to form a hole of different sizes on a job drilling is a metal removing process by a drilling machine you can do drilling operation reaming operation and boring operation.
A wheel that is out of balance negatively affects grinding operations base The foundation of a machine that supports all the other machine components The base of a surface grinding machine is the bottom portion of the machine Blanchard grinders A type of surface grinder that has a vertical spindle and rotary machine table.
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