US 12,202,026 B2Granted

Press brake

AssigneesKawasaki Jukogyo Kabushiki Kaisha, LVD Company nv

InventorsHideki Okada, Yoshihiro Uetake, Takumi Wada, Kristof Tyvaert, Alexander Cornelus

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Abstract

There is provided a press brake (1) that, if subjecting a workpiece (90) having non-uniform thickness to bending, can efficiently give uniform curvature to the workpiece (90). The press brake (1) includes: a die (2) supporting the workpiece (90); a punch supporting member (4) arranged so as to be opposed to the die (2); a moving mechanism (5) that moves the punch supporting member (4) relative to the die (2); a punch (3) that is supported by the punch supporting member (4), is opposed to the die (2) or the workpiece (90) in a relative movement direction of the punch supporting member (4), and includes punch elements (3a) lined up in a direction orthogonal to the relative movement direction; and punch element adjusting mechanisms that are disposed so as to correspond to the respective punch elements (3a) and adjusts positions of the punch elements (3a) relative to the punch supporting member (4) in the relative movement direction.

Claims20

Dependent claims

A press brake comprising:

a die;
a punch opposing the die and including punch elements lined up in a longitudinal direction of the die, each punch element having a position controller and overload preventer associated with the position controller;
a punch support supporting the punch;
and
a moving actuator configured to move the punch support relative to the die in an upper-lower direction;
wherein the position controllers are configured to adjust positions of the punch elements relative to the punch support in the upper-lower direction to change a shape of the punch, the shape is collection of the punch elements, each position controller including a screw and a holder threadingly engaged with the screw,
each overload preventer has a portion attached to and extending from an axial end of a respective one of the position controllers to allow movement of a respective one of the punch elements in the upper-lower direction in response to a load input to the respective punch element exceeding a set value, and
the position controllers are configured to individually adjust pressing forces applied to respective portions of a workpiece.

5 more elements

A press brake comprising:

a die;
a punch opposing the die and including punch elements lined up in a longitudinal direction of the die, each punch element having a means for adjusting position and a means for preventing overload with the means for adjusting position;
a punch support supporting the punch;
and
a means for moving the punch support relative to the die in an upper-lower direction,
wherein each of the means for adjusting position adjusts the position of the respective punch elements relative to the punch support in the upper-lower direction to change a shape of the punch, the shape is collection of the plurality of punch elements, and each of the means for adjusting position includes a screw and a holder threadingly engaged with the screw,
each of the means for preventing overload includes a portion attached to and extending from an axial end of a respective one of the means for adjusting positions of the punch elements to allow movement of a respective one of the punch elements in the upper-lower direction in response to a load input to the respective punch element exceeding a set value, and
the means for adjusting position individually adjust pressing forces applied to respective portions of a workpiece.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/563,075Filed 28 Dec 2021 · continuation
Priority: JP 2019-12208928 Jun 2019
Published: US 2022/0118502 A121 Apr 2022
Granted: 21 Jan 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

B21D 5/0272
On press brakes without making use of clamping means: deflection compensating means
B21D 37/02
Tools as parts of machines covered by this subclass: die constructions enabling assembly of the die parts in different ways
B21D 5/02
Bending sheet metal along straight lines, e.g. to form simple curves: on press brakes without making use of clamping means
B21D 5/0218
Tools therefor: length adjustment of the punch