Pillar member and roll formed member of vehicle
The present invention provides a pillar member of a vehicle, which is characterized by comprising: a pillar main body portion; and a connecting and joining portion provided on both ends of the pillar main body portion and coupled to a vehicle body. The pillar main body portion and the connecting and joining portion are consecutively formed. The connecting and joining portion includes: a first connecting and joining portion provided on one side of the pillar main body portion; and a second connecting and joining portion provided on the other side of the pillar main body portion so as to face the first connecting and joining portion. The pillar main body portion is consecutively formed through a roll forming technique in a region between the first connecting and joining portion and the second connecting and joining portion, and has an odd number of closed cross section portions formed therein.
1. A pillar member of a vehicle, comprising:
a pillar body portion having at least one closed cross-sectional portion; and
a connection bonding portion disposed on opposing side surfaces of the pillar body portion and consecutively cast to be connected to the pillar body portion, in order to be combined with a vehicle frame,
wherein the connection bonding portion includes a first connection bonding portion disposed on one side of the pillar body portion and a second connection bonding portion disposed on the other side of the pillar body portion to oppose the first connection bonding portion, and the pillar body portion is consecutively cast using a roll forming method in a section between the first connection bonding portion and the second connection bonding portion, thereby forming an even number of closed cross-sectional portions,
wherein at least the pillar body portion between the pillar body portion and the connection bonding portion is made of a material selected from among martensitic steel, complex phase (CP) steel, dual phase (DP) steel, transformation induced plasticity (TRIP) steel, and twinning induced plasticity (TWIP) steel, having strength of 980 MPa or higher, and
wherein the connection bonding portion is disposed on a portion of the opposing side surfaces of the pillar body portion in a length direction of the pillar body portion.
2. The pillar member of a vehicle of claim 1 , wherein the pillar body portion is consecutively cast using a roll forming method in a section between the first connection bonding portion and the second connection bonding portion to include a first closed cross-sectional portion and a second closed cross-sectional portion, having a figure- 8 type cross section.
3. The pillar member of a vehicle of claim 1 , wherein the pillar body portion includes a first body portion panel formed to be extended from the first connection bonding portion; a second body portion panel formed to be extended from the second connection bonding portion; a first closed cross-sectional portion connected to the first body portion panel and consecutively roll formed; and a second closed cross-sectional portion having one side connected to the first closed cross-sectional portion and the other side connected to the second body portion panel to be consecutively roll formed.
4. The pillar member of a vehicle of claim 3 , wherein among portions of the first body portion panel and the second body portion panel overlapping a member forming the first closed cross-sectional portion and the second closed cross-sectional portion, at least two portions are lap welded.
5. The pillar member of a vehicle of claim 1 , wherein the connection bonding portion is welded to the at least one closed cross-sectional portion disposed closest to the connection bonding portion.
6. The pillar member of a vehicle of claim 1 ,
wherein the pillar body portion and the connection bonding portion are consecutively cast using a single roll forming process.
7. The pillar member of a vehicle of claim 1 , wherein the pillar body portion has a multiple-closed cross-sectional structure including a plurality of closed cross-sectional portions formed to have a triangular cross-sectional shape or a quadrangular cross-sectional shape.
8. The pillar member of a vehicle of claim 1 , wherein the pillar body portion and the connection bonding portion are formed at an interface between a windshield and a side window of the vehicle frame in the length direction.
9. A roll formed member, comprising:
a roll formed body portion having at least one closed cross-sectional portion; and
a connection bonding portion disposed on at least one side of the roll formed body portion and combined with a structural member,
wherein the roll formed body portion and the connection bonding portion are integrally cast using a roll forming method,
wherein the connection bonding portion comprises a first connection bonding portion disposed on one side of the roll formed body portion and a second connection bonding portion disposed on the other side of the roll formed body portion to oppose the first connection bonding portion,
wherein the roll formed body portion is consecutively cast in a section between the first connection bonding portion and the second connection bonding portion using the roll forming method, in order to form an even number of closed cross-sectional portions,
wherein at least the roll formed body portion between the roll formed body portion and the connection bonding portion is made of a material selected from among martensitic steel, CP steel, DP steel, TRIP steel, and TWIP steel, having strength of 980 MPa or higher, and
wherein the connection bonding portion is disposed on a portion of opposing side surfaces of the roll formed body portion in a length direction of the pillar body portion.
10. The roll formed member of claim 9 , wherein the roll formed body portion is consecutively cast in a section between the first connection bonding portion and the second connection bonding portion using the roll forming method, in order to provide a first closed cross-sectional portion and a second closed cross-sectional portion, having a figure- 8 type cross section.
11. The roll formed member of claim 9 , wherein the roll formed body portion comprises a first body portion panel formed to be extended from the first connection bonding portion; a second body portion panel formed to be extended from the second connection bonding portion; a first closed cross-sectional portion connected to the first body portion panel and consecutively roll formed; and a second closed cross-sectional portion having one side connected to the first closed cross-sectional portion and the other side connected to the second body portion panel and consecutively roll formed.
12. The roll formed member of claim 11 , wherein among portions of the first body portion panel and the second body portion panel overlapping a member forming the first closed cross-sectional portion and the second closed cross-sectional portion, at least two portions are lap welded.
13. The roll formed member of claim 9 , wherein the connection bonding portion is welded to the at least one closed cross-sectional portion disposed closest to the connection bonding portion.
14. The roll formed member of claim 9 , wherein the roll formed body portion has a multiple-closed cross-sectional structure including a plurality of closed cross-sectional portions formed to have a triangular cross-sectional shape or a quadrangular cross-sectional shape.
15. The pillar member of a vehicle of claim 1 , wherein the connection bonding portion is not disposed on an entire side of the opposing side surfaces of the pillar body portion in the length direction.
16. The pillar member of a vehicle of claim 1 , wherein the connection bonding portion is divided to a plurality of connection bonding portions having a gap in the length direction between adjacent connection bonding portions among the plurality of connection bonding portions.