Setting tool for rivet with pull-headed mandrel

US4628722A · kind A · utility

Assignee

• USM Holding AG · US

Inventors

• Dieter Mauer · Lollar, DE
• Peter Potzas · Reiskirchen, DE

Key dates

• Filing date: Feb 14, 1986
• Grant date: Dec 16, 1986
• Expiry date: Feb 14, 2006

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/53748
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A blind-riveting tool for setting pull-type rivet assemblies of the kind which has a pulling head on the mandrel comprises abutment member and mandrel-pulling means each with a collet, the latter inside the former, resiliently urged open to admit a mandrel and arranged to be closed by advance of an actuating sleeve on the collet of the abutment member. The abutment member and mandrel-pulling means as a whole are slidable to and from, under air pressure, both having pistons, one behind the other, in a common cylinder, and are separable to effect a rivet-setting stroke by admission of hydraulic fluid between the pistons. Means is provided for delivering a fresh rivet assembly axially into the collets of the abutment member and mandrel-pulling means when they are open in their retracted positions. The tool provides for the rapid and reliable insertion and setting of automatically fed rivet assemblies of the kind referred to, while being easy for the user to operate.