LIDECO Standard Parts 07/2022

F299 . . . . . . . . . . . . Performance: Installation: *At ambient room temperature with free air flow max strokes per minute Strokes per minute, depending on stroke length, at max. 150 bar charge pressure* Stroke length of SPC in mm Time in s Travel of blank holder per unit of time Stroke in mm SPC - SPEED CONTROL™ gas springs gave a 90% reduction of blank holder bounce. Blank holder without SPC Blank holder with SPC SPC reduces speed to 0.4 m/s Press speed 1.0 m/s Dampening length (~30 mm) The diagram shows the max. possible number of strokes per minutes [min-1] of SPC gas springs with a max. filling pressure (150 bar) and max. used stroke lengths before there is a risk of excessive heating. Note ! The number of strokes per minutes can be doubled by halving the initial filling pressure. Caution ! SPC gas springs are subject to a higher heating than standard gas springs. For this reason, please ensure adequate ventilation of the SPC gas springs in the tool. It is important that approx. 25 to 30 mm before the sheet metal retainer has reached its home position, only SPC gas springs are applied. Therefore, for the retrofitting of existing tools with SPC gas springs we recommend the following two options: Option 1: Replace all existing gas springs holding the blank holder with SPC gas springs Option 2: SPC gas springs with a min. 25 mm longer nominal stroke length than with the "main gas pressure springs" are positi- oned at the four corners of the blank holder. This lifts the blank holder from the "main gas pressure springs". Attention: Springs must be installed with a recess of 25 mm to balance the total length difference (2 x stroke length = 50 mm). Alter- natively, the contact surface of the sheet metal retainer can be recessed in order to achieve the same effect. GAS SPRINGS SPC - SPEED CONTROL™ Function example: