Cold milling machines

Intelligent computer-assisted systems

Computer-assisted automatic functions not only optimise work processes and thus machine productivity, but also the machine operator’s performance. Our numerous intelligent information and diagnostic systems additionally support the operator and make their job easier – resulting in faster and more efficient operations. A few examples of assistance systems for cold milling are presented below.

Innovative MILL ASSIST

The innovative MILL ASSIST machine control system always adjusts the most favourable relationship between performance and cost when in automatic mode. The process is optimized by automatically adjusting the speed of the diesel engine and milling drum, the traction drive, the water system and the machine’s advance rate. This relieves the machine operator of a tremendous part of his workload while at the same time improving machine performance and minimizing diesel consumption, CO2 emissions, pick consumption and noise emissions.

New Dual Shift powershift transmission

The new DUAL SHIFT two-speed transmission is controlled via the MILL ASSIST feature and can be shifted even under load. DUAL SHIFT offers a tremendous milling drum speed range, making the machine the ideal candidate for a wide range of milling applications at low cost. Low milling drum speeds result in reduced diesel consumption. High milling drum speeds allow maximum advance rates, for example, in fine milling operations.

Additional pre-selection of the operating strategy in automatic mode

The operator can additionally pre-select one of three operating strategies for each application: cost-optimized, performance-optimized, or quality of the milling pattern. The machine then automatically controls the main parameter settings in accordance with the strategy chosen.

Operating strategy: Quality

Operating strategy: Costs

Operating strategy: Performance

Clear pre-Selection of consistent milling pattern quality

The specified quality of the milled surface can be preset by simple pre-selection from a scale ranging from 1 to 10. The milling drum speed and milling rate are then adjusted automatically taking into account the type of milling drum used.

Innovative efficiency display

The machine operator is continuously provided with information on the job status by means of an efficiency display. Possibilities to optimize the milling parameter settings are additionally displayed on the control panel.

WIDRIVE machine management system for cold milling machines

When operating WIRTGEN high-performance cold milling machines, the operator is assisted by the proprietary, fully integrated WIDRIVE machine management concept. WIDRIVE acts as the machine’s control centre. It integrates and controls all important machine functions, such as diesel engine, traction drive, milling drum drive, conveyor drive, water spray system, height adjustment, steering, levelling and milling drum unit. The machine’s high performance potential is fully utilized at the same time, taking into account environmental aspects, high milling performance and low operating costs.

Automatic speed adjustment in accordance with the milling process to lower diesel fuel consumption

Automatic raising of side plates, gradation control beam and scraper in transport mode

Consistently high belt speed in case of engine lugging and switching off the belt automatically during reversing and in transport mode

Automatic alignment of the machine parallel to the road surface

Travel drive with ISC (Intelligent Speed Control)

Switches on and off automatically with water feed being adjusted depending on engine load

Benefits
  • Technology for people: The workload is not only made easier for the machine operator, but he or she is also given greater motivation thanks to the cold milling machine’s convenient operation and practice-oriented modern features. He or she can thus fully concentrate on the milling process.
  • Favourable overall environmental balance: Optimised engine control reduces the burden on the environment from exhaust emissions. At the same time, noise emissions are reduced considerably.
  • Reduction in operating costs: In addition to increasing milling performance through faster operating procedures, this results in a reduction in diesel fuel consumption (thanks to situationdependent speed control) and water consumption (thanks to automatic connection and disconnection).
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Information and diagnostics system

Thanks to the WIRTGEN information and diagnostics system, the user is able to monitor the current operating data quickly and comprehensively. Automated self-diagnosis of the machine automatically monitors the diesel engine and the hydraulic and electrical components.

These include, for example:

  • Current engine status (speed, temperatures, filter states)
  • Current hydraulic system status (valve position, pressures, filter states, temperatures)
  • Current electrical system status (switching conditions, cable and sensor functions)
  • Maintenance intervals

Malfunctions are displayed and, at the same time, interactive troubleshooting is initiated immediately.
Job data collection

A variety of different performance data can be displayed on modern cold milling machines thanks to intelligent linking of the machine control and the levelling system. Job data collection makes it possible, for example, to calculate and display daily performance (in m³ or t) via the machine control.

The most important job data in detail:

  • Display of the truck’s load quantity for the purpose of optimum truck loading
  • Display of the number of loaded trucks over the course of a day of production
  • Display of the total weight of the milling quantity over the course of a day of production or the entire machine lifetime
  • Display of the milled surface over the course of a day of production or the entire machine lifetime
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WPT – WIRTGEN Performance Tracker

The WPT – WIRTGEN PERFORMANCE TRACKER uses a laser scanner to measure the cross-sectional profile to be milled. Surface milling performance and milling volume are then precisely measured using GPS positioning and other sensors. The machine operator can continuously track the most important information in real time on the control panel’s display. Afterwards, a report with all of the relevant performance and consumption data is generated automatically and made available to the machine user.

The WPT perfectly complements the WITOS FleetView telematics system and thus significantly enhances the flow of information between the people and components involved.

WPT available as retrofit kit

Large milling machines already in operation can be retrofitted with the WPT at any time. Thanks to intelligent hardware and software solutions, it is possible to retrofit these machines within a single day.

The WPT is only available for milling drum assemblies with milling widths of 2,000 mm and 2,200 mm, milling width of 2,500 mm available on request. We also recommend that you discuss the use or retrofitting of the WPT with the respective WIRTGEN GROUP sales and service companies.