Method and apparatus for bending a blade member
First Claim
1. A method of bending a blade member in which a strip-like blade member having an blade edge in one end edge in a width direction is intermittently fed to a working die portion, and a bending process is performed by said working die portion during stoppage of said feeding process, whereinsaid bending process by said working die portion includes:
- a width-direction bending step of bending said blade member in a width direction; and
a thickness-direction bending step of, after said bending process, bending said blade member in a thickness direction,in said width-direction bending step for said blade member, said blade member is clamped by a pair of rotary press claws disposed in said working die portion, from both sides in the thickness direction to be compressed in the thickness direction, whereby the compressed portion is extended in a longitudinal direction of said blade member and said blade member is bent in the width direction, andin said thickness-direction bending step for said blade member, said working die portion comprises;
a thickness-direction bending shaft; and
a thickness-direction bending cylinder which is fitted in a turning paired state onto said thickness-direction bending shaft, a blade member passing hole which allows said blade member to pass therethrough is penetratingly formed in said thickness-direction bending shaft in a direction perpendicular to an axis of said thickness-direction bending shaft, first and second openings which are opposed respectively to outlet and inlet opening ends of said blade member passing hole are formed in said thickness-direction bending cylinder, a predetermined gap is disposed between an outer peripheral face of an outlet forming portion of said blade member passing hole in said thickness-direction bending shaft, and an inner peripheral face of a first-opening forming portion in said thickness-direction bending cylinder, and said thickness-direction bending shaft and said thickness-direction bending cylinder are relatively rotated, whereby said blade member which is passed from said blade member passing hole to said first opening via said second opening is bent in the thickness direction.
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Abstract
In the width-direction bending step for the blade member, the blade member is clamped by a pair of rotary press claws 13, 14 from both sides in the thickness direction to be compressed in the thickness direction, whereby the compressed portion is extended in the longitudinal direction of the blade member and the blade member is bent in the width direction. In the thickness-direction bending step for the blade member, a working die portion comprises: a thickness-direction bending shaft 31; and a thickness-direction bending cylinder 32 which is fitted in a turning paired state onto the thickness-direction bending shaft. The thickness-direction bending shaft 31 and the thickness-direction bending cylinder 32 are relatively rotated, whereby the blade member is bent in the thickness direction.
69 Citations
26 Claims
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1. A method of bending a blade member in which a strip-like blade member having an blade edge in one end edge in a width direction is intermittently fed to a working die portion, and a bending process is performed by said working die portion during stoppage of said feeding process, wherein
said bending process by said working die portion includes: - a width-direction bending step of bending said blade member in a width direction; and
a thickness-direction bending step of, after said bending process, bending said blade member in a thickness direction,in said width-direction bending step for said blade member, said blade member is clamped by a pair of rotary press claws disposed in said working die portion, from both sides in the thickness direction to be compressed in the thickness direction, whereby the compressed portion is extended in a longitudinal direction of said blade member and said blade member is bent in the width direction, and in said thickness-direction bending step for said blade member, said working die portion comprises;
a thickness-direction bending shaft; and
a thickness-direction bending cylinder which is fitted in a turning paired state onto said thickness-direction bending shaft, a blade member passing hole which allows said blade member to pass therethrough is penetratingly formed in said thickness-direction bending shaft in a direction perpendicular to an axis of said thickness-direction bending shaft, first and second openings which are opposed respectively to outlet and inlet opening ends of said blade member passing hole are formed in said thickness-direction bending cylinder, a predetermined gap is disposed between an outer peripheral face of an outlet forming portion of said blade member passing hole in said thickness-direction bending shaft, and an inner peripheral face of a first-opening forming portion in said thickness-direction bending cylinder, and said thickness-direction bending shaft and said thickness-direction bending cylinder are relatively rotated, whereby said blade member which is passed from said blade member passing hole to said first opening via said second opening is bent in the thickness direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
- a width-direction bending step of bending said blade member in a width direction; and
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15. An apparatus for bending a blade member in which a strip-like blade member having an blade edge in one end edge in a width direction is intermittently fed to a working die portion, and a bending process is performed by said working die portion during stoppage of said feeding process, wherein
said working die portion comprises: - a width-direction bending die portion which bends said blade member in a width direction; and
a thickness-direction bending die portion which, after the width-direction bending process, bends said blade member in a thickness direction,said width-direction bending die portion comprises a pair of rotary press claws which are placed on both sides across said blade member in a manner that said rotary press claws are relatively rotatable in opposite directions, and is configured so that said rotary press claws are provided with tip end edges extending along the width direction of said blade member, and said rotary press claws are relatively rotated in opposite directions to approach each other to compress said blade member between said tip end edges from both sides of the thickness direction to compress said blade member in the thickness direction, whereby the compressed portion is extended in a longitudinal direction of said blade member and said blade member is bent in the width direction, said thickness-direction bending die portion is configured by;
a thickness-direction bending shaft; and
a thickness-direction bending cylinder which is fitted in a turning paired state onto said thickness-direction bending shaft, a blade member passing hole which allows said blade member to pass therethrough is penetratingly formed in said thickness-direction bending shaft in a direction perpendicular to an axis of said thickness-direction bending shaft, first and second openings which are opposed to outlet and inlet opening ends of said blade member passing hole are formed in said thickness-direction bending cylinder, a predetermined gap is disposed between an outer peripheral face of an outlet forming portion of said blade member passing hole in said thickness-direction bending shaft, and an inner peripheral face of a first-opening forming portion in said thickness-direction bending cylinder, and said thickness-direction bending shaft and said thickness-direction bending cylinder are relatively rotated, whereby said blade member which is passed from said blade member passing hole to said first opening via said second opening is bent. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
- a width-direction bending die portion which bends said blade member in a width direction; and
Specification