Problem Outline
- An extruder had an aluminium press that had been deteriorating
in production yield over time despite regular and extensive maintenance.
- Conventional mechanical and optical alignment methods were
unable to identify the real problems and indicate the solutions to
correct the press.
- The press manufacturers engineer was used to set up the new
cylinder, pre-stress the press and align all the moving parts. His
efforts and that of our own staff since have not produced any improvement
in yield since the cylinder was fitted.
Approach
- The real option was for ADS to come and measure the press
as they have a portable system, have extensive experience in the extrusion
industry and are the only people internationally carrying out this
specialist process.
- The ADS technique enabled a complete 3D picture of the press
to be determined and then to identify what was misaligned and the most
likely solution.
Solution
- All the points and components
required for the complete press inspection (static and moving press
components) were measured in one session and analysed in three-dimensions
as required in any combination. (without dismantling the press and under
operational conditions!).
- The results of our measurement and analysis for press alignment
provided adjustment solutions and indicators of other remedial work
to resolve the misalignment problems.
- Press history and problems essentially pointed to press misalignment.
The slides wearing and replacement frequency were indicative of Main
ram cylinder/Main ram housing misalignment or skew which most of the
conventional methods will not pick up.
Benefits
The optimisation analysis and corrective adjustment solutions enabled
normal press production to continue despite wear or distortion and without
major overhaul.
The press adjustments according to these solutions have resulted
in significant improvements, benefits and cost savings:
- Better press alignment
and monitoring techniques increase the productivity, efficiency and
quality of extrusion.
- Single day measurement
of the complete press gives you the total 3D inspection model for compliance.
- Compare any component
against specified 3D geometry.
- Measure and monitor under
operational conditions without dismantling the press.
- Conventional mechanical and optical techniques are unable
to identify the real problem(s) as they only give part of the overall
press state.
- Modern technology replaces
or complements traditional methods and tools for Extrusion Press Alignment.
- Full press alignment
measurement with modern technology is faster, more accurate and reliable,
providing:
- The initial state (for
condition monitoring) of the press,
- The correct adjustment
solution(s), and
- The optimum production
yield.
Top
Back
to ADS home page
The press adjustments according to these solutions have resulted
in significant improvements, benefits and cost savings: