| 摘要 |
A new tooling for use in a progressive die machine for the installation of self-clinching fasteners onto a sheet of material is provided. It is a complete tool easily mounted into the die during its construction and easily removed for service. Its compact size provides a minimal space between working stations on the die, and its height and stroke are minimized so as not to interfere with other operations on the die. It may be easily configured to allow for insertion of fasteners from either the top or the bottom, And is capable of correctly providing a fastener for insertion upon every cycle of the press. This is accomplished by use of a special bisected bushing which securely holds and positions each fastener in place prior to and during insertion. A replaceable force-limiting material is incorporated in the tooling above the anvil in order not to disrupt the progressive die press should fasteners or materials of excessive thickness be encountered. The force-limiting material has a preselected durometer, and acts as a cushion in the event an unexpectedly thick fastener or metal sheet (or both) is encountered. In such a case, the material absorbs the excess pressure so that the fastener is properly inserted without damager or destruction of the fastener, the part, the tooling, or the die. Different materials having an appropriately different durometer may be employed depending upon the characteristics of the fasteners and sheeting being used. <IMAGE> |
