DOOR FRAME FOR VEHICLE WITH IMPROVED ANTI-CORROSIVE PERFORMANCE AND METHOD OF MANUFACTURING THE SAME
First Claim
1. A door frame for a vehicle, comprising:
- a three-stage superimposed portion which has a structure in which an upper steel plate layer, an intermediate steel plate layer, and a lower steel plate layer are superimposed, and in which a sealer for anti-corrosive performance is applied between the upper steel plate layer and the intermediate steel plate layer; and
a curved portion which is formed at an upper side of the intermediate steel plate layer at a first end of the three-stage superimposed portion to prevent the applied sealer from being exposed to the outside.
1 Assignment
0 Petitions
Accused Products
Abstract
A door frame for a vehicle having improved anti-corrosive performance, and a method of manufacturing the door frame may includes: a three-stage superimposed portion which has a structure in which an upper steel plate layer, an intermediate steel plate layer, and a lower steel plate layer are superimposed, and in which a sealer for anti-corrosive performance is applied between the upper steel plate layer and the intermediate steel plate layer; and a curved portion which is formed at an upper side of the intermediate steel plate layer at a first end of the three-stage superimposed portion to prevent the applied sealer from being exposed to the outside, thereby improving anti-corrosive performance, and a method of manufacturing the door frame.
4 Citations
11 Claims
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1. A door frame for a vehicle, comprising:
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a three-stage superimposed portion which has a structure in which an upper steel plate layer, an intermediate steel plate layer, and a lower steel plate layer are superimposed, and in which a sealer for anti-corrosive performance is applied between the upper steel plate layer and the intermediate steel plate layer; and a curved portion which is formed at an upper side of the intermediate steel plate layer at a first end of the three-stage superimposed portion to prevent the applied sealer from being exposed to the outside. - View Dependent Claims (2, 3, 4)
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5. A method of manufacturing a door frame for a vehicle, the method comprising:
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a first step of forming a curved portion which prevents a sealer from being exposed to the outside by a roll forming process for manufacturing the door frame for the vehicle; a second step of applying the sealer onto an intermediate steel plate layer; a third step of forming a three-stage superimposed portion by allowing an upper steel plate layer and the intermediate steel plate layer to be attached to each other by the roll forming process so that the sealer, which is applied onto an upper portion of the intermediate steel plate layer, is compressed and widely applied between the upper steel plate layer and the intermediate steel plate layer; a fourth step of finishing forming the door frame for a vehicle by the roll forming process; and a fifth step of coating the formed door frame with an electrodeposition liquid. - View Dependent Claims (6, 7, 8, 9, 10, 11)
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Specification