Method and apparatus for manufacturing a lead terminal
First Claim
1. A method of manufacturing a lead terminal for an accumulator by plastic deformation on a cold-working apparatus that has a shaping station and at least one deformation station, comprising the steps of:
- a) shaping, at the shaping station, a slug that has a longitudinal extension along a longitudinal axis thereof, said slug being dimensioned for forming a terminal piece, said slug being shaped to provide a base part and a contact part for forming the terminal piece;
b) transferring the slug to said at least one deformation station of the apparatus;
c) carrying out a first deformation of the slug for inner and outer shaping of the base part thereof; and
d) carrying out a second deformation of the slug for performing at least a further inner and outer shaping of the base part thereof, andwherein the steps c) and d) are performed sequentially as progressive deformation steps, at discretely and successive moments, andwherein step c) comprises;
forming by plastic deformation in a die of said at least one deformation station, on an outer surface region of the base part of the slug, a labyrinth configuration comprising at least one ridge that protrudes from said outer surface of the base part,shaping said at least one ridge by plastic deformation in said die to provide cusps which protrude radially from sides of a crown region of the at least one ridge,pressing onto said cusps to flatten at said crown region the at least one ridge and forming through migration of material from said cusps said at least one ridge to have a mushroom form providing at least one undercut root portion, andforming a cavity that has an extension inside said base part laying along said longitudinal axis of the slug.
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Accused Products
Abstract
A method of manufacturing a lead terminal for an accumulator by plastic deformation on a cold-working apparatus that has a shaping station (2) and at least one deformation station (30. 40, 50, 60, 80) by shaping, at the shaping station, a slug (7) that has a longitudinal extension along a longitudinal axis such as to provide base (9) and contact (8) parts for the terminal and a size commensurate with the size of the terminal end piece to be manufactured; transferring the slug (7) to the deformation station (30, 40. 50, 60, 80); carrying out a first deformation of the slug (7) for inner and outer shaping of its base part (9); and carrying out a second deformation of the slug (7) for performing at least a further inner and outer shaping of the base part (9), the deformations being performed sequentially as progressive deformation steps.
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Citations
10 Claims
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1. A method of manufacturing a lead terminal for an accumulator by plastic deformation on a cold-working apparatus that has a shaping station and at least one deformation station, comprising the steps of:
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a) shaping, at the shaping station, a slug that has a longitudinal extension along a longitudinal axis thereof, said slug being dimensioned for forming a terminal piece, said slug being shaped to provide a base part and a contact part for forming the terminal piece; b) transferring the slug to said at least one deformation station of the apparatus; c) carrying out a first deformation of the slug for inner and outer shaping of the base part thereof; and d) carrying out a second deformation of the slug for performing at least a further inner and outer shaping of the base part thereof, and wherein the steps c) and d) are performed sequentially as progressive deformation steps, at discretely and successive moments, and wherein step c) comprises; forming by plastic deformation in a die of said at least one deformation station, on an outer surface region of the base part of the slug, a labyrinth configuration comprising at least one ridge that protrudes from said outer surface of the base part, shaping said at least one ridge by plastic deformation in said die to provide cusps which protrude radially from sides of a crown region of the at least one ridge, pressing onto said cusps to flatten at said crown region the at least one ridge and forming through migration of material from said cusps said at least one ridge to have a mushroom form providing at least one undercut root portion, and forming a cavity that has an extension inside said base part laying along said longitudinal axis of the slug. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification