Question

Quèstion 17

 Coining is a cold sizing operations, it includes the following characteristics (choose four from the list) (CLO3) 

•  The type of impression on both sides will be same
  

•  The pressure is about 1600 MPa

•  The metal is caused to flow in the direction of horizintal force

•  Consist of die and punch

•  The metal is caused to flow in the direction of perpendicular force

•  The type of impression is formed by tensile force

•  The impression and images are created on metal

 Question 18

 Which of the following characteristics are true for Embossing? Choose two from the list(CLO3)  

•   This Tequenic is requires grinding torque

•   It uses a die set which consists of die and punch with desire shape

•   It is used clamping set of punching hydraulic set

•   This operation is requires less force

Answer 1

1. Characteristics of Coining :

   = The pressure is about 1600 MPa

= Consist of Die and Punch

= The metal is caused to flow in the direction of perpendicular force

= The impression and Images are created on metal

Retaining ring Die holder_ Upper die Die holder Workpiece Lower die

2. Characteristics of Embossing :

   = This Operation is requires less force

= It uses a Die set which consist of die and punch with desired shape

Punch Blank te Embossed compone Fig. 2.20: Embossing