Related Directory Categories
- Clinch (8)
- Society and Culture (6)
- Genealogy (4)
- Personal Pages (2)
- History (2)
- Business and Economy (1)
- Maps and Views (1)
Sources
Help build the largest human-edited directory on the web.
Submit a site - Become an editor
Wikipedia. Licensed under the GNU Free Documentation License.
Are you an expert in this subject? Join the discussion and share your knowledge at Wikipedia.org.
Clinching Sheet Metal
From Wikipedia, the free encyclopedia
Clinching is a mechanical fastening method to join sheet metal without additional components using special tools to plastically form a mechanical interlock between the sheet metals. The tools consist typically of a punch and a die. The punch forces the two layers of sheet metal into the die cavity forming a permanent connection. The pressure exerted by the punch forces the metal to flow laterally.
Clinching is used primarily in the automotive, appliance and electronic industries, where it replaces spot welding very often. Clinching is a cold forming process and does not require electricity or cooling of the electrodes commonly associated with spot welding. Also, clinching does not generate sparks and fumes. In addition, the strength of a clinched joint can be tested non-destructively using a simple measuring instrument to measure the remaining thickness at the bottom of the joint or the diameter of the produced button depending on the type of tools being used. Life expectancy for clinching tools is in the hundreds of thousands of cycles making it a very economical process. An additional benefit of clinching is the capability to join prepainted sheet metal commonly used in the appliance industry without damaging the painted surface. Clinching has also become an important means of fastening aluminum panels, such as hoods and decklids, in the automotive industry, due to the difficulties involved with spot welding of aluminum.