1) Centre Punch:

It is used to mark center of point. It is used for the marking of centre of hole and it drills the hole. The tip of centre punch has angle from 60 to 90 degrees. 

2) Pin Punch:

Pin punch is a type of punch used to remove metal pins from a hole. First to loose the metal pin starter punch is used and then the hole is made using the pin. 

3) Drift Punch:

Drift punch is constructed as a tapered rod with hammer acting on large end of taper. It is placed into semi aligned bolt holes which separates components. 

4)  Nail Punch:

Nail punch is a tool short rod of steel which is used to drive a nail below or flush with a surface.

Types of Punches:

Introduction

Tool consisting of metal rod with conical point and it is used for making an indentation and to allow a punch make holes at same spot without slipping. There are different types of punches of which some of them are Centre punch, nail punch, pin punch, drill punch and prick punch etc. A punch press is designed specifically for the making of various shaped holes and coutouts on metal sheets and plate. The punches are fitted in punche press, also the dies of the size and ashape of the hole required. For irregular and non standard holes, the modem punch press is capable of nibbling. This refers to a series of successive its following a predetermined pattern that creates the cutout.

The punching action is accomplished by a vertical moving ram that forces the punch through the material and into a die through which the resulting slug is ejected. Additionally, a device to hold the material in place as a  punch is withdrawn , calls a stripper , and is often and integral part of the punch tool. 

Welcome to the blog of Group 5,

Tutor: Ms. Shimna shafiq

Group Members:

1) Faisal Ahmad (Group leader)
2) Yousaf Abdul Jalil
3) Tauqir reza
4) Murad Ahmad
5) Basit Ali Abbasi