Blanking punch

Patent metadata

Field	Value
Publication number	US-11192166-B2
Application number	US-201916551939-A
Country	US
Kind code	B2
Filing date	Aug 27, 2019
Priority date	Feb 28, 2017
Publication date	Dec 7, 2021
Grant date	Dec 7, 2021

Abstract

A blanking punch which extends from a first portion to a second portion along a blanking direction is provided. The second portion has a cutting edge. An engaging portion is provided/designed between the first portion and the second portion. The engaging portion enables the blanking punch to be removed from a workpiece counter to the blanking direction.

First claim

What is claimed is:

1. A blanking punch, comprising:
a first portion;
a second portion extending away from the first portion in a blanking direction; and
an engaging portion longitudinally between the first portion and the second portion,
wherein
the second portion has a cutting edge,
the first portion has an axial end facing away from the blanking direction configured to receive a blanking force from a pressure shoulder of a blanking mandrel which supports the blanking punch during a blanking operation on a workpiece, and
the engaging portion is configured to be coupled to the blanking mandrel, and to be directly coupled to an extraction tool different from the blanking mandrel such that the blanking punch is extractable by the blanking punch from the workpiece in a direction counter to the blanking direction.

2. The blanking punch according to claim 1 , wherein
the engaging portion is round in cross section and
the engaging portion has at least one circumferentially arranged engaging element that is oriented in an inclined manner along a longitudinal axis of the blanking punch.

3. The blanking punch according to claim 1 , wherein the engaging portion is in the form of a thread.

4. The blanking punch according to claim 2 , wherein the engaging portion is in the form of a thread.

5. The blanking punch according to claim 1 , wherein a diameter of the first portion immediately adjacent to the engaging portion is smaller than an outside diameter of the engaging portion.

6. The blanking punch according to claim 4 , wherein a diameter of the first portion immediately adjacent to the engaging portion is smaller than an outside diameter of the engaging portion.

7. The blanking punch according to claim 1 , wherein the first portion has an engaging region for arrangement of a blanking punch driving tool.

8. The blanking punch according to claim 6 , wherein the first portion has an engaging region for arrangement of a blanking punch driving tool.

9. A blanking mandrel, comprising:
a blanking punch according to claim 1 ; and
a punch receptacle in which the blanking punch is arranged.

10. The blanking mandrel according to claim 9 , wherein the blanking punch is arrangeable in the punch receptacle via the engaging portion.

11. A blanking tool, comprising:
a blanking mandrel according to claim 9 .

12. A blanking set, comprising:
a blanking tool according to claim 11 ; and
an extraction tool, wherein
the extraction tool has an arranging portion corresponding to the engaging portion, and a stop.

13. The blanking set according to claim 12 , wherein the extraction tool is designed to effect extraction of the blanking punch from a workpiece by rotation.

14. The blanking set according to claim 12 , wherein
the extraction tool is at least regionally in the form of a sleeve, and
the stop is in the form of a stop face on an end of the sleeve.

15. The blanking set according to claim 13 , wherein
the extraction tool is at least regionally in the form of a sleeve, and
the stop is in the form of a stop face on an end of the sleeve.

16. The blanking set according to claim 12 , wherein
the arranging portion is in the form of a threaded portion and
the arranging portion is at least as long as the engaging portion.

17. A method for blanking with a blanking punch having a first portion, a second portion extending away from the first portion in a blanking direction, and an engaging portion longitudinally between the first portion and the second portion, the engaging portion being configured to be coupled to a blanking mandrel which supports the blanking punch during a blanking operation on a workpiece and to be coupled to an extraction tool which removes the blanking punch from the workpiece in a direction counter to the blanking direction, comprising the acts of:
coupling the blanking punch to the blanking mandrel;
using the blanking mandrel to advance the blanking punch in the blanking direction during a blanking operation;
removing during the blanking operation a portion of a workpiece corresponding to a shape of the blanking punch as the blanking punch advances in the blanking direction;
removing the blanking mandrel from the blanking punch while the blanking punch remains in the workpiece after blanking;
installing an extraction tool onto the engaging portion of the blanking punch on a side of the workpiece from which the blanking mandrel was removed, until a stop on which the extraction tool is supported has been reached;
using the extraction tool to remove the blanking plug from the workpiece in a direction counter to the blanking direction.

Assignees

• Bayerische Motoren Werke Ag

Inventors

• Geiger Michael
• Sutter Nathanael

Classifications

• B21D45/003

  in punching machines or punching tools · CPC title

• B21D35/007

  Layered blanks (B21D22/203 takes precedence; joining superposed plates B21D39/031, B21D39/034, B21D39/035) · CPC title

• B21D28/34 Primary

  Perforating tools; Die holders · CPC title