Hydraulic rolling-cut shears

A hydraulic rolling-cut shear, comprising:

• a) a hydraulic cylinder, the hydraulic cylinder comprising a piston rod having a protruding end;
• b) a shear mechanism, the shear mechanism comprising an upper tool post and a lower tool post;
• the upper tool post comprising a first cutting end and a second cutting end;
• the lower tool post comprising a sheet-supporting surface;
• c) a linkage mechanism, the linkage mechanism comprising a first upper connecting rod, a first lower connecting rod, a second upper connecting rod, a second lower connecting rod, and a synchronous connecting rod;
• each of the first upper connecting rod, the first lower connecting rod, the second upper connecting rod, the second lower connecting rod, and the synchronous connecting rod comprising a first end and a second end;
• d) a hydraulic cylinder support;
• e) a guiding rod;
• f) a guiding rod support;
• and
• g) an upper beam;
• the upper beam comprising a beam surface;
• wherein
• the upper beam, the hydraulic cylinder support, the guiding rod support, and the lower tool post are fixedly connected and remain stationary in the hydraulic rolling-cut shear;
• the hydraulic cylinder is hinged to and disposed on the hydraulic cylinder support;
• the first end of the first upper connecting rod, the first end of the first lower connecting rod, and the first end of the synchronous connecting rod are hinged to the protruding end of the piston rod;
• the upper tool post is disposed between the hydraulic cylinder support and the guiding rod support;
• the upper tool post is disposed opposite to the lower tool post;
• the upper tool post is disposed between the upper beam and the lower tool post;
• the sheet-supporting surface is adapted to support a metal sheet;
• the beam surface is disposed parallel to the sheet-supporting surface;
• the first upper connecting rod, the first lower connecting rod, the second upper connecting rod, the second lower connecting rod, and the synchronous connecting rod are disposed between the upper beam and the upper tool post;
• the first upper connecting rod is disposed adjacent to the upper beam with respect to the first lower connecting rod;
• the second upper connecting rod is disposed adjacent to the upper beam with respect to the second lower connecting rod;
• the second end of the synchronous connecting rod is hinged to the first end of the second upper connecting rod and the first end of the second lower connecting rod;
• the second end of the first upper connecting rod and the second end of the second upper connecting rod are respectively hinged to the beam surface at a first hinge joint and a second hinge joint;
• the second end of the first lower connecting rod and the second end of the second lower connecting rod are respectively hinged to the first end and the second end of the upper tool post;
• an angle between the first upper connecting rod and a line that is perpendicular with respect to the sheet-supporting surface is defined as β;
• an angle between the first lower connecting rod and the line that is perpendicular with respect to the sheet-supporting surface is defined as β1;
• an angle between the second upper connecting rod and the line that is perpendicular with respect to the sheet-supporting surface is defined as α;
• an angle between the second lower connecting rod and the line that is perpendicular with respect to the sheet-supporting surface is defined as α1;
• one end of the guiding rod is hinged to the upper tool post, and the other end of the guiding rod is hinged to the guiding rod support;
• an angle between the guiding rod and a horizontal line that is parallel to the sheet-supporting surface is defined as φ;
• and
• the hydraulic cylinder is adapted to drive the piston rod to extend away from or move toward the hydraulic cylinder.