Assembly system utilising a conical, elastic locking element

A method of manufacturing an assembly system comprising the following steps:

• a) forming a member made of at least a first material including a staff and a shoulder, a part made of a second material with an aperture, and a locking element in the form of a washer based on a third material, the locking element including a hole which is smaller than the staff of the member and whose internal wall has a substantially straight portion over part of the height of the locking element and a portion which flares conically away from the substantially straight portion;
• b) passing the staff of the member freely into the aperture of the part;
• c) placing the staff against the hole in the locking element, the flared portion facing the part, and forcibly sliding the locking element against the staff by applying a force using a tool to deform the locking element in the substantially straight portion of the internal wall thereof so that the peripheral portion of the locking element is the closest to the part;
• d) stopping, then removing the tool when a predefined force less than the yield strength of the third material is reached between the tool and the shoulder of the member.