A sheet cutting apparatus includes a cutting position where a sheet is cut; a guillotine type cutter configured to move between the cutting position and a home position above the cutting position; a motor; a drive mechanism configured to transfer a drive force from the motor to the cutter to move the cutter between the home position and the cutting position; a drive control section configured to enable the cutter to fall from the home position to the cutting position when cutting a sheet by the cutter and then return the cutter to the home position; a determination section configured to determine whether or not a given period of time elapses from the last return completion of the cutter to the home position; and a return control section configured to return the cutter to the home position if the determination section determines that a given period of time elapses from the last return completion of the cutter to the home position.

Device for controlling the sharpening state of a blade (2) having a cutting edge (20) delimited by two sides (21, 22) converging towards a plane (X) that contains the cutting edge itself. The device comprises two control surfaces each of which is in contact with a corresponding side (21, 22) of the cutting edge (20) and is connected with a transducer (R4), which produces an electrical displacement signal (S4) proportional to a displacement of the control surface with respect to said plane (X). Furthermore, the device comprises a processing unit (E) that receives said displacement signals (S4) and compares them, emitting an error signal if the comparison produces a value that exceeds a predetermined limit. The control surfaces are the surfaces that delimit an external groove (40) of a roller (4) that is free to translate along an axis (A4) perpendicular to said plane (X) and spaced from the blade (2) by an amount such that said cutting edge (20) passes in said groove (40).

Device for controlling the sharpening state of a blade (2) having a cutting edge (20) delimited by two sides (21, 22) converging towards a plane (X) that contains the cutting edge itself. The device comprises two control surfaces each of which is in contact with a corresponding side (21, 22) of said cutting edge (20) and is connected with at least one transducer (R1, R2, R4), which produces an electrical displacement signal (S1, S2; S4) proportional to a displacement of the control surface with respect to said plane (X). Furthermore, the device comprises a processing unit (E) that receives said displacement signals (S1, S2, S4) and compares them, emitting an error signal if the comparison produces a value that exceeds a predetermined limit. The processing unit is connected to means (101, 102) for supporting and moving sharpening means (100).

Methods of trimming fiber reinforced polymer composite workpieces are provided which use a pure waterjet discharged from a cutting head in liquid phase unladened with solid particles at an operating pressure of at least 60,000 psi and in combination with other cutting parameters to provide a final component profile without delamination, splintering, fraying or unacceptable fiber pullout or fiber fracture.

A cutting machine includes a working surface, a carriage, a tool, and a drive mechanism. The carriage is disposed above the working surface. The tool is removably secured to the carriage and configured to move (i) toward the working surface along a first axis, (ii) relative to the working surface along a second axis transverse to the first axis, and (iii) relative to the working surface along a third axis transverse to the first axis and the second axis. The drive mechanism is offset from the first axis and configured to move the tool along the first axis.

A cutting machine includes a working surface, a carriage, a tool, and a drive mechanism. The carriage is disposed above the working surface. The tool is removably secured to the carriage and configured to move (i) toward the working surface along a first axis, (ii) relative to the working surface along a second axis transverse to the first axis, and (iii) relative to the working surface along a third axis transverse to the first axis and the second axis. The drive mechanism is offset from the first axis and configured to move the tool along the first axis.

Provided is a secondary trimming device for a photovoltaic assembly. The secondary trimming device mainly includes first clamping drive apparatuses, second clamping drive apparatuses, and a fixing base. A blade is disposed on one side of one first clamping drive apparatus facing a photovoltaic assembly. The first clamping drive apparatus can drive the blade to get close to the photovoltaic assembly. One second clamping drive apparatus is connected to one end of the first clamping drive apparatus facing away from the photovoltaic assembly and can drive the first clamping drive apparatus to rotate. The first clamping drive apparatuses and the second clamping drive apparatuses are each disposed on the fixing base.

Provided is a secondary trimming device for a photovoltaic assembly. The secondary trimming device mainly includes first clamping drive apparatuses, second clamping drive apparatuses, and a fixing base. A blade is disposed on one side of one first clamping drive apparatus facing a photovoltaic assembly. The first clamping drive apparatus can drive the blade to get close to the photovoltaic assembly. One second clamping drive apparatus is connected to one end of the first clamping drive apparatus facing away from the photovoltaic assembly and can drive the first clamping drive apparatus to rotate. The first clamping drive apparatuses and the second clamping drive apparatuses are each disposed on the fixing base.

An apparatus for cutting off plastic profiles which are extruded along an extrusion axis, the apparatus including a tool located on a tool carrier, a pivot arm by which the tool carrier together with the tool can be moved towards and away from the extrusion axis, and a device configured to pivot the pivot arm. The tool is connected to the tool carrier and can be aligned, by an adjustment mechanism, with a plane lying at a right angle to the extrusion axis and/or the tool is connected to the tool carrier and the pivot arm, the pivot arm being mounted on the pivoting device, the pivoting device being an electromechanical drive, and the electromechanical drive including at least one cycloidal gear which is directly connected to an actuator.

An apparatus for cutting off plastic profiles which are extruded along an extrusion axis, the apparatus including a tool located on a tool carrier, a pivot arm by which the tool carrier together with the tool can be moved towards and away from the extrusion axis, and a device configured to pivot the pivot arm. The tool is connected to the tool carrier and can be aligned, by an adjustment mechanism, with a plane lying at a right angle to the extrusion axis and/or the tool is connected to the tool carrier and the pivot arm, the pivot arm being mounted on the pivoting device, the pivoting device being an electromechanical drive, and the electromechanical drive including at least one cycloidal gear which is directly connected to an actuator.