Empirical method for determining the shape of a vehicle body mem

Details Empirical method for determining the shape of a vehicle body mem Empirical method for determining the shape of a vehicle body mem

1984-06-11

1986-04-08

Larson, Lowell A.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

264164, 264219, 264291, B29C 5100

Patent

active

045811920

ABSTRACT:
The shape of a non-axisymmetric vehicle body membrane panel is determined by placing a sheet of material over a scaled opening in a frame or support; constraining the edge portion of the sheet of material around the opening; heating the support and material to an elevated temperature above the glass transition temperature of the material until the modulus of elasticity of the material is relatively low and non-existent and the material has only membrane stresses which lie solely in the plane of the material and are constant over thickness. The unconstrained portion of the material within the opening deforms to the desired membrane shape so that this shape can be transferred to a die when the deformed material is thereafter cooled.

REFERENCES:
patent: 2448492 (1948-08-01), Mayne
patent: 2700007 (1955-01-01), Dennison et al.
patent: 3340101 (1967-09-01), Fields, Jr. et al.
patent: 3487133 (1969-12-01), Lindsay
patent: 4117068 (1978-09-01), Miller

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