Press-hardened shaped sheet-metal part having different sheet thicknesses and strengths
View Patent ↗A press-hardened shaped sheet-metal part, in particular a pillar reinforcement for a motor vehicle bodyshell, which has different sheet thicknesses and strengths, with an unhardened first region, or a first region which is hardened only to a small extent, and with a press-hardened second region, wherein the second region has a larger or smaller sheet thickness than the first region. A transition region, which, starting from the first region, has a sheet thickness transition zone, an intermediate zone, and a strength transition zone, is formed between the first region and the second region.
1. A press-hardened shaped sheet-metal part, which has different sheet thicknesses and strengths, comprising:
an unhardened first region, or a first region which is hardened only to a small extent;
a press-hardened second region, wherein the second region has a larger or smaller sheet thickness than the first region and has a higher strength than the first region; and
a transition region formed between the first region and the second region, wherein the transition region, starting from the first region, has a sheet thickness transition zone, an intermediate zone, and a strength transition zone.
2. The shaped sheet-metal part according to claim 1 , wherein
the intermediate zone of the transition region has a strength corresponding to the first region and a sheet thickness corresponding to the second region.
3. The shaped sheet-metal part according to claim 1 , wherein
at least one bore is arranged within the intermediate zone.
4. The shaped sheet-metal part according to claim 1 , wherein
the part is produced from a tailored rolled blank.
5. The shaped sheet-metal part according to claim 1 , wherein
the sheet thickness transition in the sheet thickness transition zone has a gradual form along with a homogeneous strength.
6. The shaped sheet-metal part according to claim 5 , wherein
the strength transition in the strength transition zone has a gradual form along with a homogeneous sheet thickness.
7. The shaped sheet-metal part according to claim 1 , wherein
the strength transition in the strength transition zone has a gradual form along with a homogeneous sheet thickness.
8. The shaped sheet-metal part according to claim 1 , wherein
the sheet thickness transition zone, the intermediate zone, and the strength transition zone are in the form of strip-shaped zones.
9. The shaped sheet-metal part according to claim 8 , wherein
the strip-shaped zones have a respective width of 35 mm to 60 mm.
10. The shaped sheet-metal part according to claim 1 , wherein
the first region has a sheet thickness of between 1.2 mm and 2.1 mm and the second region has a sheet thickness of between 2.3 mm and 2.9 mm.
11. A pillar reinforcement, comprising:
a press-hardened shaped sheet-metal part of a motor vehicle bodyshell, wherein the part is for a B pillar of the motor vehicle, and has different sheet thicknesses and strengths,
wherein the part comprises an unhardened base region, or a base region which is hardened only to a small extent, a press-hardened center region, wherein the center region has a larger or smaller sheet thickness than the base region and has a higher strength than the base region, and a transition region between the base region and the center region, which, starting from the base region, has a sheet thickness transition zone, an intermediate zone, and a strength transition zone.
12. The pillar reinforcement according to claim 11 , wherein
the intermediate zone of the transition region has a strength corresponding to the base region and a sheet thickness corresponding to the center region.