MACHINING OPERATIONS AND MACHINE TOOLS
Metal Removal Rate: 4. 2 MRR =π . D f. r. Machining time: r m. f t A T + = For a through hole. For a blind hole. r m. f d T = A. t. d. f(in/rev) 9. Twist Drill and Drilling Operations. From Kalpakjian and Schmid (2003) 10. Machine Tool for drilling • Drill press – Upright drill – Bench drill – Radial drill – Gang drill 26 drills together – NC drill • Vice, Jig and fixture. 11 ...