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Punching, bending and laser profiling go on stage
A
LVD (UK) product story
Edited by the Manufacturingtalk editorial team
Feb 18, 2002
A patented laser technology-based automatic bending system for sheet metal components will be demonstrated for the first time at a UK exhibition on a multi-axis CNC press brake.
LVD's patented laser technology-based automatic bending system for sheet metal components will be demonstrated for the first time at a UK exhibition on a PPEB-8 multi-axis CNC press brake to perform exact angle bending without the need for trial operations.
The Easy Form Laser system which operates in real time accommodates different material types and thicknesses and is able to position the hydraulic controlled ram to perform any angle to bend between 45 degrees and 150 degrees.
Alongside Easy Form Laser, demonstrations on the PPEB press brake on LVD (UK) of Marlow's stand will also feature the latest 3015S Axel 'flying optics' laser processing centre with double deck shuttle tables and 4kW GE-Fanuc HF fast flow CO2 laser for processing steel up to 20 mm thick, stainless steel up to 15mm and aluminium up to 10mm with traverse speeds of up to 170m/min.
Representing LVD's first exhibition in the UK for a punch press product developed jointly between LVD and its American company Strippit, the Global 20 turret punch press with 30 station turret and axis positioning speeds of 110m/min will be showing how high productivity punching has progressed with a hit rate of up to 800 strokes/min.
The Easy Form Laser system comprises a laser and beam splitter which projects multiple straight lines of light onto the workpiece and the vertical portion of the vee die.
The resulting measurement is analysed every 20 milliseconds and correction data is fed back to the control of the PPEB to provide an instantaneous adjustment to the process via the precise hydraulic system control of the machine and linear encoder technology.
The process is suitable for a wide range of materials including steel, stainless steel, aluminium, pre-painted and coated materials and overcomes costly and time consuming problems associated with material variance and especially, the elastic rebound factor.
This can even be different on the same sheet, which can result in a variation in bend angles, due to the grain of thickness of the material and it being presented in a different manner to the tooling.
Central to Easy Form Laser is the material database built into the PPEB control which contains a full range of values for springback or elastic rebound of a wide variety of material types and thicknesses.
When new materials are folded, the pertinent values are automatically recorded and added to the database for recall by the operating software to interact with the laser generated data during the bending process.
With the addition of shuttle tables to the Axel 3015 laser profiler, production efficiency and operator convenience are improved.
Loading and unloading of the 3000mm by 1500mm tables can be overlapped while the laser is profiling parts.
In this mode of operation, lost time for table exchange is a maximum of 20 secs.
The machine uses a fully integrated GE-Fanuc package control system to accommodate table positioning, fast-flow laser generator settings and drives.
Positional accuracy is within + 0.05mm per metre travel and repeatability within + 0.02mm.
In order to facilitate unmanned running routines, the Axel 3015 machine incorporates LVD's Laser Eye optical referencing system that provides automatic and non-contact sheet referencing and a laser beam compensation system which allows high quality cuts and edge finishing to be maintained over the full table area at speeds up to 170m/min.
The LVD/Strippit Global 20 is based on a bridge frame construction to maintain high orders of stiffness.
The Global 20 uses a GE Fanuc 180i PC-based control and drives package and incorporates a servo-driven hydraulic ram which is fully programmable.
The incorporation of Strippit's patented Smart Stroke (registered trademark), maximises productivity without operator or programmer intervention through automatic determination of the hover height of the ram based on material thickness and distance between holes.
Turret configurations for thin or thick style are available, each with replaceable hardened steel bush guides to reduce wear.
Three 88.9mm Auto-Index stations are included as standard with the option of a fourth for higher tool capacity.
Tooling flexibility can be further enhanced with the inclusion of Multi-Tools.
These offer up to 146 tools or 32 indexable tools.
Metalworking 2002 - NEC, Birmingham: April 29-May 3.
Hall: 3A.
Stand: 3370.
(This was Manufacturingtalk's Top Story on 15 February 2002).
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