1 / 108

INDUSTRIAL TRAINING INSTITUTE. PALANA, GUJARAT

INDUSTRIAL TRAINING INSTITUTE. PALANA, GUJARAT. CENTRE OF EXCELLANCE ( MECHANICAL SECTOR ). A SKILLED WORKER IS THE HEART OF INDUSTRY. MODULE : 4. BASIC TURNING AND GRINDING. DURATION 8 WEEKS. BASIC TURNING AND GRINDING. SPLIT-UP OF SYLLABUS (THEORY). TYPES OF SAFETY. General safety

oshin
Télécharger la présentation

INDUSTRIAL TRAINING INSTITUTE. PALANA, GUJARAT

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. INDUSTRIAL TRAINING INSTITUTE.PALANA, GUJARAT

  2. CENTRE OF EXCELLANCE( MECHANICAL SECTOR )

  3. A SKILLED WORKER IS THE HEART OF INDUSTRY.

  4. MODULE : 4 BASIC TURNING AND GRINDING DURATION 8 WEEKS

  5. BASIC TURNING AND GRINDING

  6. SPLIT-UP OF SYLLABUS(THEORY)

  7. TYPES OF SAFETY • General safety • Personal safety • Machine safety

  8. PERSONAL SAFETY • Wear a one piece overall or boiler suit. • Keep the over all buttons fastened. • Don’t use ties and scarves. • Cut the hair short. • Don’t wear a ring,watch or chain.

  9. MACHINE SAFETY • Switch off the machine immediately if something goes wrong. • Keep the machine clean. • Stop the machine before changing the speed. • Check the oil level before starting the machine.

  10. LATHE M/C INTRODUCTION & SPECIFICATION • The length of bed. • The maximum diameter(swing)of the work that can be turned. • The length between centers and the pitch of the lead screw.

  11. TYPES OF LATHES • Speed lathes • engine lathes • Bench lathes • Tool room lathes • Capstan and turret lathes • Special purpose lathes • Automatic lathes

  12. PARTS OF LATHE M/C • Headstock • bed • Cross slide • Compound rest • Tail stock • Feed shaft • Carriage • Lead screw • Leg • Quick change gear box

  13. HEAD STOCK • All – Geared Headstock • Cone Pulley Drive Headstock

  14. CARRAIGE • Tool post • Cross – slide • Top slide • Saddle • Saddle lock • Compound rest • Apron

  15. BED • Vee slides • Heavily ribbed • Machined ways • Heavy construction fine grain cast iron

  16. TAIL STOCK • Base • Body • Spindle • spindle locking lever • Operating screw rod • Operating nut • Tailstock hand wheel • Key • Clamping unit

  17. FEED MECHANISM • Spindle gear • Tumbler gear unit • Fixed stud gear • Change gear unit • Quick change gearbox • Feed shaft/lead screw • Apron mechanism

  18. TOOL POST • American type tool post • Indexing type tool post • Quick change tool post

  19. THREE JAW CHUCK • Backplate • Body • Jaws • Crown wheel • Pinion

  20. SPECIFICATION OF A CHUCK • Type of chuck • Capacity of the chuck • Diameter of the body • Width of the body • Method of mounting to the spindle nose

  21. FOUR JAW CHUCK • Backplate • Body • Jaws • Square threaded screw shaft

  22. DIFFERENCE BETWEEN 3 & 4 JAW CHUCK • Setting up of work is easy • Has less gripping power • Depth of cut is comparatively less • Heavier jobs cannot be turned • Workpieces cannot be set for eccentric turning • Setting up of work is difficult • More gripping power • More depth of cut can be given • Heavier jobs can be turned • Workpieces can be set for eccentric turning

  23. TYPES OF LATHE CENTERS • Ordinary centre • Half centre • Tipped centre • Ball centre • Pipe centre • Revolving centre • Insert type centre • Self-driving centre • Female centre • Swivel `v` centre

  24. TYPE OF CARRIERS • Straight tail carrier • Bent carrier • Clamp type carrier

  25. DRIVING PLATE • Catch plates • Driving plates • Safety driving plates

  26. FACE PLATE • Face-plates with only elongated radial slots • Face-plates with elongated slots and `T`slots • Face-plates with elongated radial slots and additional parallel slots.

  27. STEADY REST • Fixed steady rest • Follower steady rest

  28. FIXED STEADY REST • Top portion • Lock screw top portion • Adjustable pads • Work • Hinge • Bearing pads locking screw • Base • Lathe bed clamp

  29. FOLLOWER STEADY REST • Locking screw • Bearing pads • Adjusting screws • Frame

  30. LATHE MACHINE OPERATION - FACING • This is an operation of removing metal from the work-face by feeding the tool at right angles to the axis of the work.

  31. PURPOSE OF FACING • To have a reference plane to mark and measure the step lengths of work. • To have a face at right angle to the axis of the work. • To remove the rough surface on the faces of the work and have finished faces instead. • To maintain the total length of the work.

  32. PLAIN TURNING • Rough turning, using roughing tool or knife tool. • Finish turning using a finishing tool.

  33. GROOVING • Grooving is the process of turning a grooved form or channel on a cylindrically turned work piece. The shape of the cutting tool and depth to which it is fed determine the shape of the groove.

  34. TYPE OF GROOVES • Square grooves • Round groove • `V`shaped groove

  35. CHAMFERING • To remove burrs and sharp edges from the turned components to make their handling safe. • To permit for easy assembly of mating components. • To provide better appearance.

  36. MATHOD OF CHEFERING • Form tool method • Filling method • Compound slide method

  37. TYPE OF KNURLING • Diamond knurling • Straight knurling • Cross knurling • Concave knurling • Convex knurling

  38. TYPES OF MANDRELS • Expansion mandrel • Gang mandrel • Stepped mandrel • Screw or threaded mandrel • Taper shank mandrel • Cone mandrel

  39. DRILLING AND BORING • Drilling is the operation of originating circular holes. The tool employed for this purpose is a drill. • Two different method are employed in a lathe for this operation. • Work is clamped in the headstock in a chuck or on the faceplate. The drill is held in the tailstock and fed.

  40. TAPER • A Taper is uniform increase or decrease in diameter along the length of a cylinder.

  41. TYPES OF TAPER • Self-holding tapers • Quick releasing tapers • Morse taper • Brown and sharpe taper • Jarno taper • Metric taper • Pin taper

  42. TAPER TURNING METHOD • Form tool method • Compound slide method • Tailstock offset method • Taper turning method • Taper turning attachment method

  43. SCREW THREAD • A screw thread is a ridge of uniform section formed helically on the surface of a cylindrical body. • An external screw thread is formed on the outer surface of a cylindrical part.

  44. USE OF SCREW THREAD • As fasteners to hold together and dismantle.components when needed • To transmit motion on machine from one unit to another • To make accurate measurements • To apply pressure

  45. PART OF SCREW THREAD • Crest • Root • Flank • Thread angle • Depth • Major diameter • Minor diameter • Pitch diameter • Lead • Helix angle

  46. FORM OF SCREW THREAD • Vee threads • Square threads • Trapezoidal threads

  47. CUTTING TOOLS CLASSIFICATION • Single point cutting tools • Multi point cutting tools • Form tools

  48. TYPES OF LATHE CUTIING TOOL • Solid type tools • Brazed type tools • Inserted bits with holders • Throw away type tools

More Related