Then, jaws 20 and 23 are caused to process to approximate the profile of expire 31. Perish desk 30 is then turned on, leading to it to rise within the metal sheet. At the same time, arms 15 and 16 are rotated downwardly. Golf swing cylinders 29 and 28 will be in a “float” function to ensure that as pass away table 30 goes up and arms 15 and 16 rotate, the take of your jaws 20 and 23 is always along a series tangent to perish 31 on reverse ends. This helps prevent the aluminum sheet from kinking or bending.
While arms 16 and 15 and die table 30 are moving in order to wrap the sheet, the tension cylinders maintain the stretch in the workpiece at a constant level so that the yield range is not exceeded. The tension cylinders can be programmed to vary the stretch during portions of the cycle but this not necessarily a likely occurrence except when forming certain parts if desired. (See FIG. 7).
Die dinner table 30 will continue to arms and rise 15 and 16 still swivel before the page continues to be covered on to perish 31 towards the degree ideal. At the proper position, expire table 30 ceases its upward motion and arms 16 and 15 cease rotation. At the same time, expire 32 is reciprocated downwardly into connection with the sheet. (See FIG. 8). This step may be performed at any time throughout the wrap routine or postponed up until the part is utterly covered around die 31, based upon all the method employed. The downward push of perish 32 is limited to somewhat lower than 1/2 from the up thrust of perish dinner table 30. This gives expire 31 to overcome the opposite pressure of expire 32 when clamping the sheet.
Since the side clamp cylinders 76, dies and 75 70, 71 are mounted on perish dinner table 30, they may be actuated at will.
As soon as the sheet is entirely established, pressure in the sheet is relaxed by shifting the jaws 20 and 23 a little towards each other. If used, then, the jaws can be opened and the dies 32 and 31 separated, together with the side clamp dies 70 and 71. Inside the stretch previous 10′ displayed in FIG. 2, the cylinder rod 46 is then retracted downwardly making the beam 40 inside a cantilevered situation having an starting ample to the created page to become easily taken out by the machine operator. Then, a whole new sheet is filled as explained previously mentioned along with the whole method is recurring. Forearms 16 and 15 are independently controlled and actuated so that linens can be bent within an unsymmetrical trend where 1 side fails to have to be wrapped as far above die 31 as the other side.