TH97019A - Metal pipes for body reinforcement and car body reinforcement with such metal pipes. - Google Patents

Abstract

DC60 (02/03/54) The metal tubes for vehicle body reinforcement and the vehicle body reinforcement materials according to the invention have curves extending along the entire longitudinal length or a local longitudinal length, wherein, when the reinforcing material is composed so that a substantial portion of the outer circumference of the curve is oriented in the direction of the impact force acting on the vehicle body, the ramp load gradient, the maximum load and the total absorbed energy are increased in the event of a vehicle body crash. In particular, the increase in ramp load gradient for the load properties at the beginning of deformation provides excellent crash bearing capacity for the vehicle body reinforcement. Furthermore, the metal tubes and the vehicle body reinforcement materials according to the invention can meet the current requirements for much greater crash bearing capacity of vehicle bodies with a reduction in vehicle body weight and production costs and, therefore, the metal tubes and the vehicle body reinforcement materials according to the invention can be widely applied for the protection of occupants in vehicles. The metal tubes for vehicle body reinforcement and the vehicle body reinforcement materials according to the invention have curves extending along the entire longitudinal length or a local longitudinal length, wherein, when the material The reinforcement is composed so that the outer circumferential part of the curve is oriented in the direction of the impact force acting on the vehicle body, the gradient ramp load, the maximum load and the total absorbed energy are increased in case of a vehicle body crash. In particular, the increase in the gradient ramp load for the load properties at the beginning of deformation provides an excellent impact bearing capacity for the vehicle body reinforcement. Moreover, the metal pipes and reinforcing materials as fabricated can meet the current requirements for much higher impact bearing capacity of the vehicle body with the reduction of the vehicle body weight and production cost and thus the metal pipes and reinforcing materials can be widely applied for the protection of the occupants in the vehicle.

Claims (2)

Claims (not all) which shall not appear on the advertisement page: 1. Metal pipes for body reinforcement, to be installed on the body of the motor vehicle in a double-ended support structure to ensure its capacity to withstand a crash, comprising: a curved section extending along its entire longitudinal length; and a degree of curvature (formula) of not less than 0.002%. The degree of curvature (formula) is determined by (S-L)/Lx100(%), where S (mm) is the arc length of the curved portion and L (mm) is the overhang length determined by extending the curved portion from the outer circumference to the inner circumference; wherein, when the curved portion is formed for such metal pipes, the conducting pipe is displaced continuously in the axial direction of the pipe and the conducting pipe is locally heated to a temperature at which plastic deformation can occur. Including at the temperature of hardening, by using a high-frequency heating coil placed over the outer circumference of the processing pipe, and then the processing pipe is rapidly cooled after the bending moment is applied to the heated part to form a more curved section. 2. Metal pipes for vehicle body reinforcement, which are installed on the vehicle body in a double-ended supporting structure to ensure the ability to withstand a crash, consisting of: a curved section extending along the entire longitudinal length; and a degree of curvature (formula) of not less than 0.002%. The degree of curvature (formula) is determined by (S-L)/Lx100(%), where S (mm) is the circular arc length of the curved section, and L (mm) is the extension length determined by extending the curved section from the outer circumference to the inner circumference, wherein When a curved section is formed for such a metal pipe, the processing pipe is made to move continuously in the axial direction of the pipe, and the processing pipe is locally heated to a temperature at which plastic deformation can occur. Including the temperature at which the hardening occurs, by means of a high-frequency heating coil positioned over the outer circumference of the tube, and the tube is then rapidly cooled after a bending moment is applied to the heated portion to form a more progressively curved section. 3. A metal tube for reinforcing the body of a vehicle of claim 1, wherein the ratio of the gradient ramp load of said metal tube to the gradient ramp load of the straight tube is not less than 1.25 when the three-point bending test in a limited support at both ends is used. 4. A metal tube for reinforcing the body of a vehicle of claim 2, wherein the ratio of the gradient ramp load of said metal tube to the gradient ramp load of the straight tube is not less than 1.25 when the three-point bending test in a limited support at both ends is used. 5. A metal tube for reinforcing the body of a vehicle of claim 1, wherein the profile of the bending section of said metal tube is of a circle, or an ellipse or a shape resembling a circle or an ellipse. 6. A metal tube for reinforcing the body of a vehicle of claim 2, wherein the cross-sectional outline of said metal tube is of a circle or ellipsoidal shape or a shape resembling a circle or ellipsoidal shape. 7. A body reinforcing material, wherein the ends of the metal tube of claim 1 are welded to the body of the vehicle for reinforcing the body of the vehicle, the outer circumference of the curves in said metal tube is oriented substantially in the direction of the impact force acting on the body of the vehicle. 8. A body reinforcing material, wherein the ends of the metal tube of claim 2 are welded to the body of the vehicle for reinforcing the body of the vehicle, the outer circumference of the curves in said metal tube is oriented substantially in the direction of the impact force acting on the body of the vehicle. 9. A body reinforcing material of claim 7, wherein said reinforcing material can be applied to: The door impact beam, front bumper beam, rear bumper beam, transverse member reinforcement material, front pillar reinforcement material, center pillar reinforcement material and side door edge reinforcement material 1 0. The body reinforcement material of claim 8, wherein said reinforcing material can be applied to the door impact beam, front bumper beam, rear bumper beam, transverse member reinforcement material, front pillar reinforcement material, center pillar reinforcement material of side door edge reinforcement material 1 1. The body reinforcement material of claim 7, wherein the compression strength Fb (kN) of said metal tube for reinforcing the body of the vehicle at the ends of the tube satisfies the inequality (l): Fb>5(formula)0.4, where (formula) = (S - L)/Lx100(%) S : Arc length (mm) of the curve along the tube L : Projection length (mm) determined by projecting the curved portion out from the circumference on the inside 2. The body reinforcement material of claim 8, wherein the compression strength Fb (kN) of said metal tube for reinforcing the body of the vehicle at the pipe end satisfies the following inequality (l): Fb>5(Formula)0.4 S : Length of arc (mm) of the bend along the tube L : Length of projection (mm) determined by projecting the bend from the outer perimeter to the inner perimeter 1 3. The body reinforcement material of claim 7, wherein said metal tube for reinforcing the body of the vehicle has supports for connecting the tube to the body of the vehicle at both ends 1 4. The body reinforcement material of claim 8, wherein said metal tube for reinforcing the body of the vehicle has supports for connecting the tube to the body of the vehicle at both ends 1 5. The body reinforcement material of claim 13, wherein, when said metal tube is used as a door impact beam, each said support is a flat support or support 6. The body reinforcement material of claim 14, wherein, when said metal tube is used as a door impact beam, each said support is a flat support or support, a step support or support that is a unit of the hinge 1. 7. The body reinforcement material of claim 13, wherein the compression strength Fb (kN) of each said support satisfies inequality (1) as follows: Fb>5(Formula)0.4(1), wherein (Formula) = (S-L)/Lx100(%) S : Length of projection (mm) determined by extending the curved portion from the outer circumference to the inner circumference 1 8. The body reinforcement of claim 14, wherein the compression strength Fb (kN) of each said support shall satisfy the following inequality (1): Fb > 5(formula)0.4(1), wherein (formula) = (S-L)/Lx100(%) S : arc length (mm) of the bend along the pipe L : overhang length (mm) determined by extending the bend from the outer circumference to the inner circumference 1 9. The body reinforcement of claim 15, wherein the compression strength Fb (kN) of each said support shall satisfy the following inequality (1): Fb>5(formula)0.4, wherein (formula) = (S-L)/Lx100(%) S : arc length (mm) of the bend along the pipe L : overhang length (mm) determined by extending the bend from the inner circumference Outside to the inner perimeter 2 0. The vehicle body reinforcement material of claim 16, wherein the compression strength Fb (kN) of each said support supports satisfies the following inequality (1): F>5(formula) 0.4 wherein (formula) = (S-L)/Lx100(%) S : arc length (mm) of the curved portion along the pipe L : projection length (mm) determined by extending the curved portion from the outer perimeter to the inner perimeter 2 1. A metal pipe for reinforcing the vehicle body of claim 1, wherein the curved portion has a curved structure based on the increased bending of the metal pipe after the heating step 2. 2. A metal pipe for reinforcing the vehicle body according to claim 2, wherein the curved portion has a curved structure based on the increased bending of the metal pipe after the heating process.