The invention relates to an apparatus for determining the angle () between two planar workpiece surfaces (1, 2), comprising a laser transmitter (10) for a laser beam (9), a continuously rotating straightening rotor (3), which is arranged between the two workpiece surfaces (1, 2), is axially parallel to the vertex axis (5) of the angle () and has an emission direction for the laser beam (9) that is perpendicular to the rotor axis (4), and comprising a receiving device (11) having a receiver for the laser beam (9) reflected on the workpiece surfaces (1, 2) in the emission direction, and an evaluation circuit (18) connected to the receiving device (11). In order to provide advantageous constructive conditions, it is proposed that the laser transmitter (10) comprises a monitor diode (16) and that the monitor diode (16) forms the receiver for the reflected laser beam (9).

The invention relates to a production plant (1), in particular for folding workpieces (2) to be produced from sheet metal, comprising a bending press (3), in particular a press brake, having a press beam (13, 16), at least one bending tool (4), such as a bending punch (5) and bending die (6), which is connected to the press beam (13, 16), and at least one angle-measuring device (46) for determining an angular position of at least one limb (35, 36) of the workpiece (2) formed by a bending operation relative to a reference plane (41, 42). The angle-measuring device (46) comprises at least one inclination sensor (39) having a reference surface (40) and the inclination sensor (39) is mounted by the angle-measuring device (46) so that it can be placed with the reference surface (40) lying in contact with a surface portion of at least one of the limbs (35, 36) of the workpiece (2).

The invention relates to an apparatus for determining the angle () between two planar workpiece surfaces (1, 2), comprising a laser transmitter (10) for a laser beam (9), a continuously rotating straightening rotor (3), which is arranged between the two workpiece surfaces (1, 2), is axially parallel to the vertex axis (5) of the angle () and has an emission direction for the laser beam (9) that is perpendicular to the rotor axis (4), and comprising a receiving device (11) having a receiver for the laser beam (9) reflected on the workpiece surfaces (1, 2) in the emission direction, and an evaluation circuit (18) connected to the receiving device (11). In order to provide advantageous constructive conditions, it is proposed that the laser transmitter (10) comprises a monitor diode (16) and that the monitor diode (16) forms the receiver for the reflected laser beam (9).

A rotary bending device for bending workpiece includes a saddle, a rocker, and first and second alignment elements. The saddle includes a longitudinally extending cavity in which the rocker is received, and the rocker rotates relative to the saddle between a neutral position and a bending position for bending the workpiece. The first alignment element is provided on the rocker, and the second alignment element is positioned to engage the first alignment element to limit axial movement of the rocker relative to the saddle during rotation of the rocker between the neutral position and the bending position. The rocker may tangentially contact a bearing surface of the cavity at no more than two lines of tangential contact during rotation. The rocker may further include a longitudinally extending shoulder, and the device may further include a return element positioned to contact the shoulder for biasing the rocker toward the neutral position.

This disclosure relates to tools for punching machines for reshaping at least one portion of a plate-shaped workpiece. The tools have a first tool portion that includes a first device configured to be held in a first tool holder of the punching machine and a bending stamp having a bending edge and a second tool portion comprising a second device configured to be held in a second tool holder of the punching machine and a bending roller configured to cooperate with the bending stamp to reshape the plate-shaped workpiece. The bending roller is rotatable around a rotation axis running parallel to the bending edge. The bending roller comprises a sector-shaped notch formed along the rotation axis and formed, at least in part, by first and second bending shank edges.

The bending roller comprises a plurality of second bending segments positioned on the rotation axis to rotate about the rotation axis.

An arm 12 for positioning a control system 14 of a machine tool 10 includes a first arm section 30 configured for horizontally pivoting. The first arm section 30 includes a plurality of linear sections 130, 132, 134, 136 angled with respect to each other. The first arm section 30 has a first downward vertical taper in height from a proximal end 33 to the distal end 35 of the first arm section. The first arm section also has a second downward vertical taper in height from an innermost side 110 of the first arm section to an outermost side 114 of the first arm section 30.

To provide a mold for a press brake in which an ascending and descending member that is relatively pressed and lowered by an upper table in a press brake is provided vertically movably with respect to a mold base mountable on a lower table in the press brake, an upper surface of a workpiece supporting member provided in the mold base and a lower surface of a workpiece pressing member provided in the ascending and descending member vertically face each other, and the upper surface of the workpiece supporting member is inclined so that a front side thereof becomes relatively lower than the lower surface of the workpiece pressing member.

An upper die is movable through a die guide rail on a lower portion of a ram in a press machine and a connection rail connected to the die guide rail. The upper die includes, on right and left sides of a center portion as viewed in a front-rear direction, protrusions that protrude in the front-rear direction and move while being guided by grooves included in the die guide rail and the connection rail. The protrusions each include an outer guided portion on an outer side in a transportation direction relative to the center portion and an inner guided portion on an inner side closer to the center portion than the outer guided portion, and a distance in the transportation direction between the outer guided portion and the inner guided portion is greater than a clearance distance between the die guide rail and the connection rail.

In an installing method for installing divided upper tools to upper tool holders disposed to be spaced at an appropriate interval in a left-right direction in a lower portion of an upper table of a press brake, by using a tool changer, a round bar-shaped finger provided in the tool changer is engaged in a circular engagement hole provided at a central portion in the lateral direction of each divided upper tool. The divided upper tool is temporarily positioned in a gap between an upper tool holder to which the divided upper tool is to be installed, and an adjacent upper tool holder. The temporarily positioned divided upper tool is moved in the left-right direction to be installed to the upper tool holder to which the divided upper tool is to be installed.

A press brake machine configured to bend a workpiece. The machine includes an upper beam configured to hold an upper tool assembly that includes an upper rotary tool configured to hold an upper punch and an upper die. The machine also includes a lower beam configured to hold a lower tool assembly that includes a lower rotary tool configured to hold lower punch and a lower die. The upper rotary tool assembly is configured to rotate the upper punch and the upper die and the lower rotary tool assembly is configured to rotate the lower punch and the lower die. The upper rotary tool assembly is configured to position to the upper punch downwards to a first upper rotary tool position when the lower rotary tool assembly positions the lower die upwards to a first lower rotary tool position such that the upper punch.