Forming method and forming apparatus
AssigneeKYB Corporation
InventorsTomomi HAYASE, Ryuichi KANEKO
Life of this patent
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Abstract
Provided are a forming method and a forming apparatus which can secure strength after forming while suppressing deformation. The forming method of the present invention includes a burring step and a pressing step. In the burring step, a branch pipe is formed by causing a cylindrical peripheral wall of a cylindrical member (workpiece) having the peripheral wall to project in an outside direction in a tubular shape. In the pressing step, a distal end surface of the branch pipe is pressed toward a proximal end portion of the branch pipe. In the pressing step, the distal end surface of the branch pipe can be pressed by an end surface pressing punch in a state where a burring punch is inserted in the branch pipe.
Claims6
A forming method, comprising:
- a burring step of forming a branch pipe by causing a cylindrical peripheral wall of a cylindrical member having the peripheral wall to project in an outside direction in a tubular shape;
- and
- a pressing step of pressing a distal end surface of the branch pipe toward a proximal end portion of the branch pipe.
A forming apparatus, comprising:
- a burring processing unit for forming a branch pipe in a direction orthogonal to a central axis of a cylindrical workpiece;
- and
- a pressing unit for pressing a distal end surface of the branch pipe toward a proximal end side of the branch pipe,
- wherein
- the burring processing unit includes:
- a burring punch which is disposed inside a cylindrical member having a cylindrical peripheral wall and is provided so as to be movable in a direction orthogonal to a central axis of the cylindrical member;
- and
- a first drive means for moving the burring punch toward the peripheral wall, and
- the pressing unit includes:
- an end surface pressing punch disposed outside the cylindrical member and provided so as to be movable in the direction orthogonal to the central axis of the cylindrical member;
- and
- a second drive means for moving the end surface pressing punch toward the distal end surface of the branch pipe.
Dependencies are inferred from the claim text.