Loading & Glazing
- 1. Mr. Ketan K. Devadhara Mechanical Engineering DepartmentIn 2005,A Vallabh Budhi Polytechnic has been started in the field of Engineering & Technology as per guidelines of (AICTE) All India Council for Technical Education, New Delhi and Gujarat Technological University,Ahmedabad. VALLABH BUDHI POLYTECHNIC, NAVSARI-655 Facebook.com/vbp655 CIVIL Engineering COMPUTER Engineering ELECTRICA LEngineering MECHANIC ALEngineering 9409749547 dec655owner@gtu.edu.in NPPE Campus, Bhanunagar, Eru-Aat Road ,Ta. Jalalpore, Di. Navsari.Pin:396445, Gujarat, India I/c Head of Department
- 2. V.B.POLYTECHNIC, NAVSARI. (655) MECHANICAL ENGG. DEPARTMENT
- 3. V.B.POLYTECHNIC, NAVSARI. (655) MECHANICAL ENGG. DEPARTMENT LOADING TRUEING GLAZING DRESSING
- 4. V.B.POLYTECHNIC, NAVSARI. (655) MECHANICAL ENGG. DEPARTMENT LOADING: When the material of the work piece is filled the gap between the abrasive grain then it is called as loading. It prevent the wheel from cutting freely. REASONS: Use of hard grade wheel Soft workpiece material Slow cutting speed Fast cut Deep cut
- 5. V.B.POLYTECHNIC, NAVSARI. (655) MECHANICAL ENGG. DEPARTMENT GLAZING: A glazed wheel occurs when the abrasive grains are dull. The cutting surface of the wheel appears shiny. It is a condition in which cutting edge take glass- like appearance. REASONS: Use too hard wheel Hard workpiece material High wheel speed Absence of cutting fluid
- 6. V.B.POLYTECHNIC, NAVSARI. (655) MECHANICAL ENGG. DEPARTMENT TRUEING: Trueing is called the process of changing the shape of the wheel. This is done to make tool true and concentric with its center. It can be done on the new or on the used wheel. REASONS: Soft workpiece material Use of too hard wheel Slow cutting speed
- 7. V.B.POLYTECHNIC, NAVSARI. (655) MECHANICAL ENGG. DEPARTMENT DRESSING: Dressing of grinding wheel is done to remove the loading and to breakaway the glazed surface of the wheel, to bring out the sharp abrasive particles for grinding the work. REASONS FOR DOING TRUEING & DRESSING: To regain the shape & efficiency of the wheel. To reduce the heat generated between work & wheel. To improve the surface quality of the work. To reduce the strain on machine & wheel.
- 8. V.B.POLYTECHNIC, NAVSARI. (655) MECHANICAL ENGG. DEPARTMENT TYPES OF DRESSER The tool used for trueing & dressing is called "Dresser". The dressers are of the following types. Metal crushers Abrasive sticks/ wheels Diamond dresser (a) Single point diamond dresser (b) Single set and matrix diamond dresser (c) Rotary and stationary diamond rolls (d) Crushing rolls
- 9. V.B.POLYTECHNIC, NAVSARI. (655) MECHANICAL ENGG. DEPARTMENT THANK YOU