Precision forging method, precision forging device, and precision forging product
AssigneeNational University Corporation Tokai National Higher Education and Research System
InventorZhigang Wang
Life of this patent
Estimating the term…
Abstract
A precision forging method includes arranging a metal material in a die cavity so that a distal end surface of a wall portion of the metal material is opposed toward a stopper and a bottom portion of the metal material is opposed toward a punch. Further, the precision forging method includes moving the punch, which includes a cutting blade on an edge of a working end surface, in the die cavity to cut part of the wall portion thickness-wise with the cutting blade and cause shear deformation in the cut portion.
Claims13
1-12. (canceled)
A precision forging method that includes arranging a metal material including a wall portion, which extends in a moving direction of a punch, and a pre-working projecting wall, which extends from the wall portion in a direction intersecting the moving direction, in a die cavity of a die, and moving the punch to forge the metal material, the precision forging method comprising:
- a first step of arranging the punch, which includes a working end surface and a cutting blade formed at an edge of the working end surface, in the die cavity so that the punch is opposed toward part of the wall portion thickness-wise and the pre-working projecting wall of the metal material;
- and
- a second step of moving the punch within a range of a height of the wall portion in a state in which the metal material is held in the moving direction of the punch and a length of the pre-working projecting wall in the intersecting direction is maintained so that the cutting blade cuts the part of the wall portion thickness-wise located in a moving path of the punch and causes shear deformation in the cut part to move the cut part toward the pre-working projecting wall.
A precision forging device for forging metal material, the precision forging device comprising:
- a die including a die cavity configured to allow for arrangement of the metal material;
- and
- a punch configured to move in the die cavity to forge the metal material;
- wherein the metal material includes a wall portion, which extends in a moving direction of the punch, and a pre-working projecting wall, which extends from the wall portion in a direction intersecting the moving direction, wherein the punch is opposed toward part of the wall portion thickness-wise and the pre-working projecting wall when the metal material is arranged in the die cavity, wherein the punch includes a working end surface and a cutting blade, which is formed on an edge of the working edge surface, and wherein when the punch is moved within a range of a height of the wall portion, the cutting blade is configured to cut part of the wall portion thickness-wise in a moving path of the punch and cause shear deformation in the cut part.
A precision forging product comprising:
- a wall portion extending in a first direction;
- a post-working projecting wall extending from the wall portion in a second direction that intersects the first direction, wherein the post-working projecting wall includes a first surface, which is at a side where a joint line between the wall portion and the post-working projecting wall is located, and a second surface, which is at a side opposite to the first surface;
- and
- a metal flow extending from the joint line to a joint line in the second surface, the metal flow extending substantially along a straight line connecting the two joint lines in a cross section taken along the first direction.
Dependencies are inferred from the claim text.