Die and punch for forming a joint and method of making the die
AssigneeBTM Corporation
InventorEdwin G. Sawdon
Life of this patent
Estimating the term…
Abstract
A die (24) and punch (32) is employed to form a joint (74) between at least two sheets of material (70; and 72). The preferred embodiment die (24) has a shield (54) surrounding an anvil (52). This shield (54) has at least one aperture (120) extending therethrough.
Claims38
A die for forming a joint between sheets of material, said die comprising:
- an anvil;
- a substantially rigid shield coaxially and laterally surrounding said anvil, an outside surface of said shield having at least one normally unobstructed aperture
- at least one die blade disposed between said anvil and said shield;
- and
- means for biasing said at least one die blade toward said anvil.
A die for forming a continuous and nonlanced joint between within sheets of material, said die comprising:
- an anvil;
- a shield coaxially and laterally surrounding said anvil, said shield having an upper edge;
- and
- at least one die blade disposed and laterally movable between said anvil and said shield, said at least one die blade having an upper edge substantially coplanar with said upper edge of said shield prior to forming said continuous and nonlanced joint.
An apparatus for forming a joint between sheets of material, said apparatus comprising:
- a die having an anvil, said anvil having a contact surface and an intersecting peripheral contact edge;
- a punch assembly including a punch having a contact surface and an intersecting peripheral contact edge;
- and
- a frusto conical taper disposed along an entire portion of at least one of said peripheral contact edges, one of said sheets of material at said joint being forced to fake a final shape substantially identical to said taper and said contact surface.
An apparatus for forming a joint between sheets of material, said apparatus comprising:
- a die having an anvil and a shield coaxially and laterally surrounding said anvil, said shield having a substantially cylindrical outside surface;
- a punch assembly including a punch and a stripper surrounding at least a portion of said punch, said stripper having an external surface with substantially the same diameter as said outside surface of said shield;
- and
- at least one die blade laterally surrounding said anvil and having portions which longitudinally project beyond said anvil, said at least one die blade being laterally movable away from said anvil during formation of said joint.
A die for forming a joint between sheets of material, said die comprising:
- a die body having a groove disposed, in a peripheral surface thereof;
- and
- an upstanding member having an internal surface with a protruding segment, said protruding segment of said upstanding member being snappably engagable with said groove of said die body.
A die for forming a joint between sheets of material, said die comprising:
- a groove located on an upstanding member;
- and
- a protruding segment located on a peripheral surface of a die body, said protruding segment of said die body being snappably engagable with said groove of said upstanding member.
A method of manufacturing a die comprising the steps of:
- (a) machining a die body;
- (b) machining a die shield;
- and
- (c) snap fitting said die shield to said die body.
Dependencies are inferred from the claim text.