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away from the plane of the grinding wheel in such a way as to provide an axial force component, feeding the workpiece through between the two wheels. Through-feed grinding can be very efficient because it does not require a separate feed mechanism; however, it can only be used for parts with a simple
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The speed of the two wheels relative to each other provides the grinding action and determines the rate at which material is removed from the workpiece. During operation the workpiece turns with the regulating wheel, with the same linear velocity at the point of contact and (ideally) no slipping. The
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centerless grinding is used to grind workpieces with relatively complex shapes, such as an hourglass shape. Before the process begins, the workpiece is loaded manually into the grinding machine and the regulating wheel is moved into place. The complexity of the part shapes and grinding wheel shapes
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platform. One wheel, known as the grinding wheel (stationary wheel in the diagram), is on a fixed axis and rotates such that the force applied to the workpiece is directed downward, against the work-holding platform. This wheel usually performs the grinding action by having a higher
124:
centerless grinding, the workpiece is fed axially into the machine on one side and comes to rest against an end stop; the grinding operation is performed, and then the workpiece is fed in the opposite direction to exit the machine. End-feed grinding is best for tapered workpieces.
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than the workpiece at the point of contact. The other wheel, known as the regulating wheel (moving wheel in the diagram), is movable. This wheel is positioned to apply lateral pressure to the workpiece, and usually has either a very rough or
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are interchangeable, to allow for different grits and shapes. Machines designed to accommodate through-feed grinding operations will allow the angle of the regulating wheel to be adjusted, to accommodate parts of different sizes.
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Centerless grinding uses purpose-built centerless grinding machines. Such a machine will always include the grinding wheel, regulating wheel, and some means of supporting a workpiece. Modern machines may involve
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centerless grinding, the workpiece is fed through the grinding wheels completely, entering on one side and exiting on the opposite. The regulating wheel in through-feed grinding is
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Centerless grinding is typically used in preference to other grinding processes for operations where many parts must be processed in a short time.
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There are three forms of centerless grinding, differentiated primarily by the method used to feed the workpiece through the machine.
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50:, and the speed of their rotation relative to each other determines the rate at which material is removed from the workpiece.
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In centerless grinding, the workpiece is held between two wheels, rotating in the same direction at different speeds, and a
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to remove material from a workpiece. Centerless grinding differs from centered grinding operations in that no
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grinding wheel turns faster, slipping past the surface of the workpiece at the point of contact and removing
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required to grind them accurately prevent the workpiece from being fed axially through the machine.
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is used to locate and secure the workpiece; the workpiece is secured between two rotary
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221:(Illustrated ed.). Industrial Press, Inc. pp. 21–27.
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A schematic diagram of the centerless grinding process
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Todd, Robert H.; Allen, Dell K.; Alting, Leo (1994).
157:A close-up of the grinding wheel and back-up wheel
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75:-bonded abrasive to trap the workpiece.
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218:Manufacturing Processes Reference Guide
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598:Electrical discharge machining
387:Numerical control (NC and CNC)
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445:List of drill and tap sizes
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761:Magnetic switchable device
164:computer numerical control
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83:of material as it passes.
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603:Electrochemical machining
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683:Rotary transfer machine
668:Photochemical machining
608:Electron-beam machining
570:Tool and cutter grinder
170:and improve precision.
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879:Tools and terminology
258:"Centerless Grinding"
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148:
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905:Grinding and lapping
797:Machining vibrations
703:Ultrasonic machining
262:Processes: Machining
149:A centerless grinder
817:Tool and die making
505:Cylindrical grinder
185:Cylindrical grinder
28:Centerless grinding
485:Abrasive machining
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34:process that uses
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57:Working principle
16:Machining process
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802:Speeds and feeds
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530:Grinding machine
525:Grinding dresser
392:Stewart platform
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68:tangential speed
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910:Metalworking
771:Rotary table
751:Lathe center
638:Machine tool
470:Grinding and
310:Metalworking
266:. Retrieved
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232:. Retrieved
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121:
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101:through-feed
100:
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95:Through-feed
90:
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63:work-holding
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27:
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849:Fabrication
785:Terminology
721:Angle plate
648:Metal lathe
540:Jig grinder
450:Tap and die
359:engineering
110:cylindrical
899:Categories
869:Metallurgy
663:Pantograph
455:Tap wrench
268:2013-01-31
234:2013-01-31
228:0831130490
191:References
168:automation
864:Machining
859:Jewellery
827:Workpiece
822:Tramp oil
812:Tolerance
643:Machining
633:Jig borer
618:Engraving
593:Broaching
580:Machining
460:Threading
425:Drill bit
407:threading
348:Machining
166:to allow
141:Equipment
32:machining
874:Smithing
613:End mill
520:Grinding
480:Abrasive
440:Drilling
415:Die head
402:Drilling
179:See also
122:end-feed
116:End-feed
884:Welding
854:Forming
844:Casting
776:Wiggler
766:Mandrel
736:Fixture
698:Turning
693:Skiving
653:Milling
628:Hobbing
550:Sanding
545:Lapping
472:lapping
134:In-feed
129:In-feed
112:shape.
44:fixture
40:spindle
731:Collet
688:Shaper
678:Reamer
673:Planer
623:Facing
588:Boring
382:G-code
225:
105:canted
73:rubber
807:Swarf
726:Chuck
420:Drill
87:Types
81:chips
30:is a
367:2.5D
223:ISBN
746:Jig
404:and
377:CAM
372:CAD
120:In
99:In
42:or
901::
260:.
243:^
199:^
340:e
333:t
326:v
302:e
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
