| 摘要 |
<p>A fastening tool inserts a self-penetrating fastener (10-18) into workpieces (20, 22) and then sets the fastener (10-18) in a manner similar to a blind riveting tool. The fastener (10-18) has a stem (10), a mandrel (16) connected to the stem (10), and a body (12) surrounding a portion of the stem (10) adjacent the mandrel (16). The body (12) has an enlarged head (14) at the end opposite the mandrel (16). The mandrel (16) has a point (18) for penetrating the workpieces (20, 22). The fastening tool applies a force to the fastener (10-18), causing it to penetrate the workpiece (20, 22). The fastening tool then pulls the stem (10) in a direction away from the workpiece (20, 22), while restraining the body (12) against movement relative to the workpiece (20, 22). The mandrel (16) expands the lower portion of the body (12) radially as it is pulled into contact with the body (12), forming a second or blind head (80) on the side of the workpiece (22) opposite the fastening tool.</p> |
