Technology of self clinching fasteners

Basic information about technology of self clinching fasteners

The self clinching fasteners notion in general includes nuts, screws, standoffs and columns, which can be pressed into exactly cut out holes in sheet and in sections. These fasteners can be pressed into thin plastic boards (e.g. circuit boards).
The sheet material moves under considerable pressure (cold forming) into a specially shaped groove, which is located at the shank of the self clinching fastener. The toothed groove and its special profile prevent the pulling out or slight turning of the fastener from the sheet.

After this operation, a very firm and perfectly perpendicular joint of self clinching parts with sheet (plastic) will be made. Practically, one unit will be made.

Technology of self clinching fasteners is extremely advantageous, particularly for a steel plate with surface treatment (galvanizing, varnishing, and/or anodic oxidisation of aluminium sheets).

The technology for stainless steel sheets is appropriate as well.

Use of self clinching fasteners in thin sheets (plastic) is optimal, high strength of a threaded joint being required.

Self clinching fasteners represent a progressive method of making a quality threaded joint.

Assembly procedure

Cut out a circular hole into a sheet, which diameter (to be chosen under the Product range link) depends on the used fastener. Minimum distance (to be chosen under the Product range link) of the axis of the hole from the closest edge of the sheet to be met. Otherwise, the sheet may become waved.

Press the fastener. Optimal pressing pressure is determined by trial and error. The fastener must not be fitted by hitting. Steel fastener may be pressed into Al sheet only after its surface treatment (anodic oxidisation), if any.

1) Cutting out the hole in the sheet	2) Inserting the fastener	3) Pressing of the fastener	4) Connection of two thin sheets