Method for rolling Z-section sheet piles
AssigneeProfilARBED S.A.
InventorHenri Grober
Life of this patent
Estimating the term…
Abstract
A method is presented for hot rolling a Z-section sheet pile from a semi-finished H-beam. The semi-finished H-beam is oriented in such a way that its web is substantially parallel to a rolling plane. A preform of the sheet pile is first rolled in a first plurality of rolling passes to form a preform having two flange/web transition sections substantially parallel to the rolling plane. These two flange/web transition sections connect rough-rolled portions for the sheet pile flanges to a middle section which is oblique to the rolling plane. A final Z-section sheet pile is formed from the preform in a second plurality of rolling passes.
Claims11
A method for hot rolling a Z-section sheet pile from a semi-finished H-section product, which H-section product has a rolling plane, a web, and four flange tips, the method including the steps of:
- introducing said H-section product in a rolling mill train having a plurality of rotating rolls and a rolling plane parallel to the rotation axes of said rotating rolls, the web of said H-section product being parallel to said rolling planes;
- performing a first plurality of rolling passes on said semi-finished H-section product to form a Z-section sheet pile preform having
- (a) first and second rough-rolled preforms of the lateral flanges and claws of the Z-section sheet pile to be formed,
- (b) a middle section oblique to said rolling plane, and
- (c) first and second flange/web transition sections connecting said middle section respectively to said first and second rough-rolled preforms of the lateral flanges and claws, said first and second flange/web transition sections being flattened so as to be substantially parallel to said rolling plane;
- and
- performing a second plurality of rolling passes on said Z-section sheet pile preform to form a Z-section sheet pile having a plane web, two lateral flanges connected to said web, and a claw terminating each of said lateral flanges.
A method for hot rolling a Z-section sheet pile from a semi-finished H-section product, which H-section product has a rolling plane, a web, and four flange tips, the method including the steps of:
- introducing said H-section product in a rolling mill train having a plurality of rotating rolls and a rolling plane parallel to the rotation axes of said rotating mils, the web of said H-section product being parallel to said rolling planes;
- performing a first plurality of rolling passes on said semi-finished H-section product to form a Z-section sheet pile preform having
- (a) first and second rough-rolled preforms of the lateral flanges and claws of the Z-section sheet pile to be formed,
- (b) a middle section oblique to said rolling plane, and
- (c) first and second flange/web transition sections connecting said middle section respectively to said first and second rough-rolled preforms of the lateral flanges and claws, said first and second flange/web transition sections being flattened so as to be substantially parallel to said rolling plane the width of each of said flange/web transition sections substantially parallel to the rolling plane exceeding at least 15% of the final width of said plane web;
- and
- performing a second plurality of rolling passes on said Z-section sheet pile preform to form a Z-section sheet pile having a plane web, two lateral flanges connected to said web, and a claw terminating each of said lateral flanges.
Dependencies are inferred from the claim text.