Go to top

home

TECHNICAL GUIDE

PUNCHING TOOLS

Vol.8 VARIOUS KINDS OF SPECIAL SHAPE

TECHNICAL GUIDE

PUNCHING TOOLS

Vol.8 VARIOUS KINDS OF SPECIAL SHAPE

For punching with a turret punch press, various types of special shape tooling are used.

JOINT TOOLING

When processing a large number of products with one piece of material (sheet),
a joint type is used to hold the products together.

There are two types of joints: MICRO JOINT and WIRE JOINT.

MICRO JOINT

Fix the product to the base material with a small joint and give vibration to the workpiece after processing.

１．Joint of corner part

The outer periphery is removed at square or rectangle,
and a part is connected without cutting off the corner as shown in the right figure.

Detail of Joint

Detail of Joint

Cases of micro joint processing
（Joint of corner part）

Cases of micro joint processing（Joint of corner part）
２．Joint of straight part
Joint of straight part

Cases of micro joint processing
（Joint of corner part）

Cases of micro joint processing（Joint of straight part）
The number and width of micro joints vary depending on the thickness, material, shape and size of the workpiece.
It is recommended to actually process and check with reference to the above dimensions.

WIRE JOINT

Use a wire joint larger than a micro joint to hold large products together.

Detail of Joint

Detail of Joint

Cases of micro joint processing
（Joint of corner part）

Cases of micro joint processing（Joint of corner part）

CORNER RADIUS

Use the corner radius type (CR type) to Round the corners of the product.
Typical corner radius types are as follows.

Standard Corner radius tool Corner radius tool with tangent line Corner radius with joint
Standard Corner radius tool
Corner radius tool with tangent line
Corner radius with joint

NIBBRING RADIUS TOOLING

There are the following methods for removing holes larger than the size of the punching.

  • 1.Slitting processing by Round Nibbling Method
  • 2.Slitting processing by Curved tool punching Method
Round Nibbling Method Curved tool punching Method Radius tooling with Joint
Round Nibbling Method
Curved tool punching Method
Radius tooling with Joint
The punched surface becomes wavy. The central part pulls out with a round or square shape, and the outer peripherynibble with a rounded shape. Provide a joint and remove the joint after processing.

PDF Download

Vol.8 VARIOUS KINDS OF SPECIAL SHAPE(497KB)

OTHER TECHNICAL GUIDE