Today I know about PUNCH
AND ITS TYPE , USE, MADE BY WHICH METAL :-
Lets start -
PUNCH (पंच)
Punch are used in industry and Training Institute, Machanical engineer workshop.
Its is used for hardness of marking line on surface of job and metals , sheet.
Material :-Its made by high carbon steel or hard and taper. Punch are made by 10 or 12mm radius of high carbon rod.
( TYPE OF PUNCH )
(पंच के प्रकार )
1. DOTT PUNCH (डाॅट पंच)
2. CENTRE PUNCH ( सेन्टर पंच)
3. PRICK PUNCH (प्रिक पंच )
4. AUTOMATIC PUNCH (ऑटोमैटिक पंच)
5. BELL PUNCH (बैल पंच)
6. SOLID PUNCH( साॅलिड पंच)
7. HOLLOW PUNCH( हाॅलो पंच)
8. PIN PUNCH ( पिन पंच )
9. DOUBLE END PUNCH (डबल पंच )
1. DOTT PUNCH:- Its made by High carbon steel. Body are punch are nurling for perfect greep. Grind point angle is 60°. Its used for hardest the marking line on job. (FIG 1)
2. CENTRE PUNCH :- Its look like a dott punch only difference is Grind point angle is 90°. Its used for deep the centre point for drill point. (FIG 2)
3. PRICK PUNCH :- Its also look like a dott punch but difference is Grind point angle is 30°. Its used for marking on thin sheet .
(Fig 3)
4. AUTOMATIC PUNCH:- In this punch not needed hammer. Its made like this type when push upper ponit of punch then mark on surface of jobs. Because in internal body fit a spring stickar(स्ट्राइकर ) on upper.
When a push a stickar then a punch mark on job or sheet. Its is easy to punch.
5. BELL PUNCH :- In punch look like a bell and conical typer. In this internal punch. Its used for find out the center point of round rod with the help of hammer. (Fig 4)
6. SOLID PUNCH :- In this punch not a conical grind but its front point is cylindrical. Its used for hollow in hot rod of black Smith. Its also used in thin sheet when temperature is cold. (FIG 5)
7. HOLLOW PUNCH :- Its type of punch internal body are hollow. Its used for thin sheet or washer for cutting hole. (FIG 6)
8. PIN PUNCH :- In this fornt point is cylindrical or taper. Size of point are more than other punch. Its also used in thin sheet for hole. And its also used for DOWEL PIN or TAPER PIN for out from sheet. Its available in market in 12mm size. (FIG 7)
9. DOUBLE END PUNCH :- Its have two point difference at 3 to 5mm. Its easy for punch because marking point at same length. (Fig 8)
Mostly are used is dott punch, centre punch, and prick punch in work shop and industry's
Soo I Think read care fully
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