Basic Information of Machining Processes.ppt
- 1. Shri. Shamrao Patil (Yadravkar) Educational & Charitable Trust’s Sharad Institute of Technology, College of Engineering Yadrav- (Ichalkaranji) (Approved by AICTE, New Delhi, Recognized by Government of Maharashtra & Affiliated to DBATU, Lonere) Accredited by NAAC ‘A’ Grade and NBA, ISO 9001:2015 Certified Institute Recognized u/s 2(f) and 12(B) of the UGC Act 1956 An Autonomous Institute Machining Processes Mr. S M Ghanvat ME (CAD/CAM/CAE) Assistant Professor Mechanical Department
- 2. Introduction Miscellaneous cutting operations that can be performed on a lathe
- 4. General view of a typical lathe, showing various components
- 5. The Turning Process Geometry of a typical right-hand cutting tool Designations for a right-hand cutting tool.
- 8. Lathes and Lathe Operations Lathe Components
- 9. Workholding Devices and Accessories (a) and (b) Schematic illustrations of a draw-in type of collet. The workpiece is placed in the collet hole, and the conical surfaces of the collet are forced inward by pulling it with a draw bar into the sleeve. (c) A push-out type of collet. (d) Work holding of a workpiece on a face plate.
- 10. Various types of mandrels to hold workpieces for turning. These mandrels usually are mounted between centers on a lathe. Note that in (a) both the cylindrical and the end faces of the workpiece can be machined, whereas in (b) and (c) only the cylindrical surfaces can be machined.
- 11. Lathe Operations Miscellaneous cutting operations that can be performed on a lathe
- 12. Types of Lathes Schematic illustration of the components of a turret lathe.
- 13. (a) A computer-numerical-control lathe. Note the two turrets. These machines have higher power and spindle speed than other lathes in order to take advantage of new cutting tools with enhanced properties. (b) A typical turret equipped with 10 tools, some of which are powered.
- 14. Turning-process Capabilities Range of dimensional tolerances obtained in various machining processes as a function of workpiece size.
- 15. The range of surface roughnesses obtained in various processes.
- 16. Design Considerations and Guidelines for Turning Operations
- 17. Chip Collection Systems Chips can be collected by any of the following methods: ° Allowing gravity to drop them onto a steel conveyor belt. ° Dragging the chips from a settling tank. ° Using augers with feed screws (similar to those in meat grinders). ° Using magnetic conveyors (for ferrous chips). ° Employing vacuum methods of chip removal.
- 18. Cutting Screw Threads a) Cutting screw threads on a lathe with a single-point cutting tool. (b) Cutting screw threads with a single-point tool in several passes, normally utilized for large threads. (c) A typical coated-carbide insert in the process of cutting screw threads on a round shaft. (d) Cutting internal screw threads with a carbide insert.
- 19. Boring and Boring Machines Schematic illustration of a vertical boring mill. (a) Schematic illustration of a steel boring bar with a carbide insert. (b) Schematic illustration of a boring bar with tungsten-alloy “inertia disks”
- 20. Drilling, Drills, and Drilling Machines Drills Two common types of drills: (a) Chisel-edge drill. (b) Crankshaft drill.
- 21. Various types of drills and drilling and reaming operations.
- 22. Material-removal Rate in Drilling Drilling Practice
- 23. (a) Schematic illustration of the components of a vertical drill press. (b) A radial drilling machine. Drilling Machines
- 24. A three-axis computer numerical-control drilling machine.
- 25. Design Considerations for Drilling
- 26. Reaming and Reamers (a) Terminology for a helical reamer. (b) Inserted-blade adjustable reamer.
- 27. Tapping and Taps (a) Terminology for a tap. (b) Tapping of steel nuts in production.