Back to results
US 8,371,149 B2Granted
Methods for forming sheet metal components having three-sided corners and related components and systems
AssigneeTRUMPF Laser- und Systemtechnik GmbH
InventorAndreas Vogel
Life of this patent
Estimating the term…
Abstract
A sheet metal component that is bent from a sheet metal blank includes at least one three-sided corner. Two edges of the three-sided corner are formed by a first bending member of the sheet metal blank bent about a first inner bending radius Ri,1 and a second bending member of the sheet metal blank bent about a second inner bending radius Ri,2, and the third edge of the three-sided corner is formed by a first blank edge of the first bending member and a second blank edge of the second bending member. The sheet metal blank has an internal corner that forms the first blank edge, the second blank edge, and a wedge-like recess that opens in the internal corner.
Claims9
A method comprising:
- forming a sheet metal blank comprising:
- a first bending member that forms a first blank edge;
- a second bending member that forms a second blank edge;
- and
- a wedge-shaped recess that is formed by a first straight segment of the blank, a second segment of the blank, and a rounded segment of the blank that interconnects the first and second straight segments,
- in the sheet metal blank, a first point is located at an intersection of lines along which the first and second straight segments extend, the first point being positioned at a distance u from a first bending line of the first bending member and at a distance x from a second bending line of the second bending member,
- the first straight segment extending along a line that passes through the first point and a second point, the second point being positioned at a distance v from the first bending line of the first bending member and at a distance z from the second bending line of the second bending member, the first straight segment terminating at the first blank edge of the first bending member,
- the second straight segment extending along a line that passes through the first point and a third point, the third point being positioned at a distance T from the first bending line of the first bending member and at a distance y from the second bending line of the second bending member, the second straight segment terminating at the second blank edge of the second bending member,
- in the sheet metal blank, the distances T, u, v, x, y, z are selected in accordance with the first inner bending radius Ri,1, the second inner bending radius Ri,2, the thickness S of sheet metal blank, and a shortening factor VK by which the sheet metal blank is extended during bending, as:
- T=(0.7*S+VK/2)±20%,
- u=(1.0*Ri,1)±20%,
- v=(1.0*Ri,1)±20%,
- x=(1.0*Ri,2)±20%,
- y=(0.25*Ri,2)±20%, and
- z=(VK/2−0.1)±20%;
- and
- forming said sheet metal blank into a shape by bending said first and second bending member.
14 more elements
A sheet metal component formed by a process comprising:
- forming a sheet metal blank comprising:
- a first bending member that forms a first blank edge;
- a second bending member that forms a second blank edge;
- and
- a wedge-shaped recess that is formed by a first straight segment of the blank, a second segment of the blank, and a rounded segment of the blank that interconnects the first and second straight segments,
- in the sheet metal blank, a first point is located at an intersection of lines along which the first and second straight segments extend, the first point being positioned at a distance u from a first bending line of the first bending member and at a distance x from a second bending line of the second bending member,
- the first straight segment extending along a line that passes through the first point and a second point, the second point being positioned at a distance v from the first bending line of the first bending member and at a distance z from the second bending line of the second bending member, the first straight segment terminating at the first blank edge of the first bending member,
- the second straight segment extending along a line that passes through the first point and a third point, the third point being positioned at a distance T from the first bending line of the first bending member and at a distance y from the second bending line of the second bending member, the second straight segment terminating at the second blank edge of the second bending member,
- in the sheet metal blank, the distances T, u, v, x, y, z are selected in accordance with the first inner bending radius Ri,1, the second inner bending radius Ri,2, the thickness S of sheet metal blank, and a shortening factor VK by which the sheet metal blank is extended during bending, as:
- T=(0.7*S+VK/2)±20%,
- u=(1.0*Ri,1)±20%,
- v=(1.0*Ri,1)±20%,
- x=(1.0*Ri,2)±20%,
- y=(0.25*Ri,2)±20%, and
- z=(VK/2−0.1)±20%.
12 more elements
Dependencies are inferred from the claim text.