Method for the integrated management of the parameters regarding the cutting of road surfaces and road scarifier implementing said method

Abstract

The invention is a road scarifier for cutting road surfaces, comprising: a frame provided with a cutter, supported by tracks by means of hydraulic actuators suitable for modifying the position of said cutter with respect to the road surface; driving means to obtain the setting in motion of the machine and the rotation of said cutter; right and left sensors arranged at the sides of the machine and suitable for measuring the distance from the road surface; sensors to show the inclination of said machine with respect to the horizontal plane. Each one of the right and left sensors and said inclination sensor (α) sends signals to first data processing systems, the first data processing systems being suitable for comparing the values measured with those preset and for sending out difference signals that are received by a data processing unit capable of sending control signals to hydraulic actuators connected to the frame of the machine, in such a way as to reduce to zero the difference signal sent out by said first data processing systems.

1 ) Road scarifier for cutting road surfaces, comprising: 
 a frame provided with at least one cutter, supported by tracks by means of hydraulic actuators suitable for modifying the relative position of said frame and said tracks, in such a way as to modify the position of said cutter with respect to the road surface;    driving means to obtain the setting in motion of the machine and the rotation of said cutter;    right and left sensors arranged at the sides of the machine and suitable for showing the relative distance between said sensors and the road surface;    sensors to show the inclination of said machine with respect to the horizontal plane,    wherein each of said right and left sensors and said inclination sensor sends signals to first programming and controlling data processing systems, said first data processing systems being suitable for comparing the measured values with the preset values and for emitting difference signals that are received by a signal processing unit capable of sending control signals to hydraulic actuators connected to the frame of the machine, in such a way as to reduce to zero the difference signals sent out by said first data processing systems.    
     
     
         2 ) Road scarifier according to  claim 1 , wherein the values preset in said first data processing systems are two, the third value being derived directly from the other two.  
     
     
         3 ) Road scarifier according to  claim 1 , wherein said data processing unit is provided with a selector suitable for enabling two of the three first data processing systems, indifferently, for the presetting of data the third of said first data processing system being set consequently.  
     
     
         4 ) Road scarifier according to  claim 1 , wherein the hydraulic actuators are hydraulic cylinders, more precisely two front and two rear cylinders, said front cylinders being hydraulically connected to each other, so that they can be operated by means of a single control.  
     
     
         5 ) Method for the operation of a road scarifier according to  claim 1 , suitable for removing asphalt from road surfaces by cutting with preset scarification depth and inclination, comprising a first cycle for the setting of the parameters to be obtained and a working cycle, wherein it comprises the following steps: 
 A) lifting the hydraulic jacks supporting the frame of the machine and resting on the tracks with maximum extension;    B) lowering the hydraulic jacks until the cutting drum of said scarifier rests on the road surface;    C) measuring the distance between the road surface and the lateral sensors positioned on the right and left side of the machine frame, by means of a first right data processing system and of a first left data processing system, respectively;    D) measuring the transversal inclination of the machine by means of an inclination sensor and a further first data processing system;    E) sending said signals to said first right and left data processing systems and to said inclination data processing system on the respective first right scarification depth, left scarification depth and inclination display;    F) setting to zero the values shown by said first displays by means of a reset button acting on each one of said first data processing systems;    G) setting two values chosen among the right scarification depth, left scarification depth and inclination in two of said first data processing systems;    and in that the working cycle comprises the following steps: 
 A1) starting the rotation of the cutting drum and the machine;  
 B1) sending the values taken by said right and left sensors and by said inclination sensor to said first right and left scarification depth data processing systems and inclination data processing system;  
 C1) comparing the values taken with the values preset in said first data processing systems;  
 D1) sending out a difference signal from each first data processing system, said difference signal being proportional to the difference between the values taken and those preset and being received by a data processing unit;  
 E1) sending out control signals from the data processing unit to hydraulic actuators connected to the frame of the machine, said control signals being such as to vary the values measured by the right and left scarification depth sensors and by the inclination sensor, in such a way as to restore the preset values.