Tools for cold flow forming of assembly points in sheet metal
OwnerJean-Claude Faivreinventor
Life of this patent
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Abstract
Improvements relating to tools for cold flow forming of assembly points in sheet metal. The tools comprise first tool (1) with a punch (6) and a blank holder (5) and a second tool (10) with a guiding surface (16) from which extends a finger (14) terminated by an anvil (15), a die (20) formed by at least two shells (18), each of said shells (18) having a shoulder (21) slidingly mounted on the guiding surface (16) and in contact with the lateral surface of the finger (14) through resilient means (26), the guiding means of the sections (18) being provided together with a stop restricting the separation of the shells (18) during cold flow. The improvements are characterized in that the stop consists of two half sections (30) elastically secured to the second tool (10).
Claims14
Tool for forming joints between sheet material, said tool comprising a first tool-part (1) with a punch (6) and a side pressing element (5) for engaging one side of the sheet material, a second tool-part (10) cooperable with the first tool part and provided with a support surface (16) from which an anvil (15) extends, a matrix (20) comprising at least two matrix-parts (18) for engaging the other side of the sheet material and being arranged around said anvil (15) and laterally displaceable relative to said anvil, each matrix-part (18) comprising a heel (21) arranged for sliding against said support surface (16) and being applied against a lateral surface of said anvil (15) by means of elastic means (26), means for guiding the matrix-parts (18) during sliding movement and a stop means limiting the lateral displacement of the matrix-parts (18) characterized in that the stop means comprises at least two shell-formed parts (30) fixed elastically on said second tool-part (10).
Dependencies are inferred from the claim text.