Punch
The punch ( punch , also punch ) is a punching tool . It is used as a punch to punch in accordance with the shaped elements in the shearing process to separate out from a workpiece.
It is a short hollow cylinder - the so-called perforated pipe - made of hardened steel , which is sharply ground at the lower edge and provided with a stem (the shaft ) at the top . To punch, place it vertically on the workpiece and hit the shank with a hammer (by hand or machine) so that the sharp edge of the punch can penetrate the workpiece.
One differentiates:
- Round punching iron ( punching pipe i. E. S., because of the similarity to the sound generator pipe ), cutting edge with a cylindrical shaft made of one piece, in which the core hole of the round cutting edge opens into a lateral ejection opening
- Punch punches are hand tools with a conical punch head on two supports, which create a recess on both sides
- Shaped punches are punches with a special, non-circular geometry (oval, rectangular, etc.)
- Cap irons are called such shaped punching irons, especially in leather processing, with which elongated holes with rounded ends can be made, e.g. B. for fastening buckles in belts .
There are also numerous modifications of special tools and tool inserts, depending on the material, as well as tools with a central ejector punch that ejects the punched piece forwards.
Punch punches are used for punching leather , cardboard and paper , tarpaulins and mats made of textiles , rubber , plastics and the like. In the wood industry , the punch is used to cut round pieces out of thin wooden leaves. Sheet metal punches (sheet metal punch) are used to punch holes in sheet metal such as aluminum, insulating pipe, brass or soft steel without burrs. They are also used for the production of seals , as a tool in one work step when riveting , and when stamping such materials. Commercially available punches are usually ground conically on the outside. When punching seals made of paper or other hard materials, a burr is raised at the edge of the hole; It would be more beneficial to use a cylindrical or internally conically ground punch.
See also
- List of tools
- Hole punch (punching holes in paper)
Individual evidence
- ↑ a b For example with illustrations: Locheisen. (No longer available online.) In: Catalog. M. Paffrath OHG, Remscheid, paffrath-remscheid.de, archived from the original on March 8, 2005 ; Retrieved November 11, 2008 . Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
- ↑ Punch. (No longer available online.) In: The large tool dictionary. Westfalia Tool Co. GmbH & Co KG, westfalia.de, archived from the original on September 4, 2009 ; Retrieved November 13, 2008 . Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
- ↑ Punch. (No longer available online.) In: The large tool dictionary. Archived from the original on September 17, 2011 ; Retrieved November 12, 2008 . Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
- ↑ Fig. Round hole punching + punching pipes. (No longer available online.) Industrie Gravuren GmbH, formerly in the original ; Retrieved November 13, 2008 . ( Page no longer available , search in web archives ) Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice.
- ↑ Sheet metal punch. (No longer available online.) Paffrath, archived from the original on March 15, 2005 ; Retrieved November 11, 2008 . Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
