ps:®MTP3Ri3-31,75 for tooling system THICK TURRET
For more than 30 years multitools are known as a flexible solution for CNC punching machines. The necessary flexibility for an automatically working without manual tool changes is established on the rotating station of the punching machines. There is no problem for conventional multitools to work with thin sheets, BUT when used with thicker materials: steel from 3 mm, alu from 6 mm and stainless steel from 2 mm thickness will prove to be a lifetime-killer: A central force application and eccentrically arranged tools provoke tilting of the punches. For punching forces up to 300 kN, users report high stripping forces and early worn guides.
3-station multitool ps:®MTP3Ri3-31,75 for tooling system THICK TURRET
- simple and quick change of punch inserts, with maximum process stability
- minimum tool and guide wear, due to single-pressure-operated punch inserts and max. guide length
- special spring to control grind life after sharpening punch inserts
- internal and external lubrication channels
- no “witness-marks” on the sheet, due to single active punch – all unused punches stay up
- individual adjustment of stripping force
- maximum sheet thickness of up to s = 6 mm mild steel and s = 4 mm stainless steel
The tool designers of PASS Stanztechnik AG on the one hand optimized the distribution of foces within the multitool with the clever devised design. On the other hand, improved guidance conditions on the punches are provided. Eight punching springs are arranged in the upper part of the tool and replace the previously conventional center stripping spring in the bottom of the tool. The quantity and the forces of the springs can be varied individually for adjustment of special applications. The arrangement creates space in the bottom of the tool for optimized holding and guide design for each individual punch insert. All punches are held axially on a rotating punch holding plate. Only the active punch will move axially through the hole of the punch holding guide. Through this hole the punch will act individually from the activity pin. For activating and positioning the tool, the tool head and tool bottom are screwed against each other.
In contrast to the conventional multitool designs, all non-active punches remain axially fixed. For the active punch, this results in a stabilizing guide ratio of punch diameter to guide length in the order of 1:3. The guide ratio for conventional designs with a common guide and movement of all tools in one holder shows a disadvantageous value of 2:1.
The design of the ps:®MTP3Ri3-31,75 multitool enables a simple and fast change of the inserts. For this reason the screw in the upper part must be loosened. The hole of the punch holding plate will need to be rotated to the desired insert which needs to be changed. After radial removal of the "clicked in" stripper plates on the bottom side of the tool, the punch can be removed.
An inspection tool simplifies the measurement of the usable tool length, especially when using reground punches. A control-spring is placed in the center of the upper part of the tool which will be pressed against the block by the manual operation of the multitool. The insert at this position can easily be measured and directly provide the value for the useable tool length. A simple way which meets the first users consistently positive resonance.
ps:®MTP3Ri3-31,75 for tooling system THICK TURRET can be used for aluminium sheets (0,4 - 6 mm), for steel with an elastic limit of 420 N/mm2 (0,5 - 4 mm) and stainless steel (0,5 - 3 mm).