| 摘要 |
Provided is a multipoint stretch forming apparatus enabling individual clamping control for manufacturing a curved panel, wherein a plurality of stretching units are positioned at both sides at a lower position of a supporting frame in forward and backward directions, and each of the stretching units is independently and individually controlled. Further, since the distance between the right and left stretching units is adjustable in accordance with the size of punch modules and the size of a curved panel to be formed, the precision formation of both wide and narrow curved panels/shapes is possible. Through this technical constitution, an atypical curved panel is formed more efficiently and the loss of panel material is remarkably reduced. |
| 主权项 |
1. A multipoint stretch forming apparatus enabling individual clamping control for manufacturing a curved panel, comprising:
a supporting frame; a bottom punch module supported by the supporting frame and positioned at a lower portion of the supporting frame; two sets of stretching devices supported by the supporting frame and respectively arranged at both sides at the lower portion of the supporting frame, wherein each set has a plurality of stretching units arranged seriately; a top punch module supported by the supporting frame and positioned at an upper portion of the supporting frame to be vertically movable; a fixed casing fixedly positioned at one side of the both sides at the lower portion of the supporting frame to support one of the two sets of the stretching devices positioned at the one side of the supporting frame; a movable casing positioned at the other side of the both sides at the lower portion of the supporting frame to be movable in the both side directions and to support the other of the two sets of stretching devices positioned at the other side of the supporting frame; a moving cylinder positioned at the supporting frame between the fixed casing and the movable casing to move the movable casing in the both side directions; a control unit to control the bottom punch module, the plurality of the stretching units, the top punch module and the moving cylinder; and a guide positioned between the fixed casing and the movable casing to guide the movable casing in the both side directions, wherein each of the plurality of stretching units is independently and individually controlled by the control unit so that each part of a panel sheet is stretched by a different pressure in accordance with a curved shape of the curved panel, and the moving cylinder is operated to adjust a distance between the two sets of stretching devices in accordance with sizes of the bottom punch module and top punch module and a size of the curved panel to be formed, and wherein each of the plurality of stretching units comprises: a clamp including a receiving groove positioned inside and a clamping cylinder positioned above the receiving groove, a stretching cylinder unit including a first stretching cylinder, a second stretching cylinder, and a third stretching cylinder disposed between the first and the second stretching cylinders, and a connecting member to connect the clamp and the stretching cylinder unit, wherein each of the first, second and third stretching cylinders include a body connected to the supporting frame and an operating plunger connected to the connecting member by a hinge, to stretch the panel sheet clamped in the clamp. |
