Crimping blade profile
AssigneeProcess Conception Ingenierie
InventorGabriel Le Guevel
Life of this patent
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Abstract
The invention relates to a crimping blade with a profile such that the angle of attack β of the sheet metal to be crimped remains constant during the entire crimping phase. In this way, the force applied to the sheet metal is always at the same angle in relation to the sheet metal.
Claims23
Pre-crimping blade for crimping a metal sheet having a profile wherein the profile is such that an angle of attack β of the metal sheet to be crimped remains constant when the blade pushes on an edge of the metal sheet rectilinearly such that the edge of the metal sheet slides on the profile following a trajectory, which performs a folding operation on the metal sheet, wherein the angle β is comprised between 45° and 60°.
Pre-crimping blade for crimping a metal sheet having a profile wherein the profile is such that an angle of attack β of the metal sheet to be crimped remains constant when the blade pushes on the metal sheet rectilinearly, wherein the profile of the blade is calculated with the following formula:
- y
-
-
- n
- =
- L
- +
- ∑
- 0
- n
-
- R
-
- [
- -
- cos
-
- (
- θ
-
-
- n
- )
- -
- sin
-
- (
- θ
-
-
- n
- )
- +
- cos
-
- (
- θ
-
-
- n
- -
- 1
- )
- +
- sin
-
- (
- θ
-
-
- n
- -
- 1
- )
- ]
- +
- L
- [
- sin
-
-
- θ
-
-
- n
- )
- -
- sin
-
- (
- θ
-
-
- n
- -
- 1
- )
- ]
- +
- R
-
-
- m
-
- [
- -
- θ
-
-
- n
- ·
- sin
-
- (
- θ
-
-
- n
- )
- +
- θ
-
-
- n
- -
- 1
- ·
- sin
-
- (
- θ
-
-
- n
- -
- 1
- )
- ]
- tan
-
- (
- β
- +
- θ
-
-
- n
- -
- 1
- )
- wherein
- R is the outer crimping radius,
- e is the thickness of the metal sheet to be crimped,
- Rm=R−e/2,
- θ is the folding angle of the metal sheet,
- β is the angle of attack of the metal sheet, and
- L is the height of the edge to be crimped.
Pre-crimping blade for crimping a metal sheet having a profile wherein the profile is such that an angle of attack β of the metal sheet to be crimped remains constant when the blade pushes on an edge of the metal sheet rectilinearly such that the edge of the metal sheet slides on the profile following a trajectory, which performs a folding operation on the metal sheet, wherein the blade pushes on an outer point of an edge of the metal sheet.
Pre-crimping blade for crimping a metal sheet having a profile wherein the profile is such that an angle of attack β of the metal sheet to be crimped remains constant when the blade pushes on an edge of the metal sheet rectilinearly such that the edge of the metal sheet slides on the profile following a trajectory, which performs a folding operation on the metal sheet, wherein the profile of the blade is defined wherein the folding operation is performed on a metal sheet forming an angle of more than 90 degrees before folding to an angle of less than 90 degrees after folding.
Dependencies are inferred from the claim text.