Method of automatic setting, adjusting and monitoring tool position in producing images on solid surfaces

IPC classes for russian patent Method of automatic setting, adjusting and monitoring tool position in producing images on solid surfaces (RU 2347681):

B44B3 - Artists' machines or apparatus equipped with tools or work holders moving or able to be controlled substantially two-dimensionally for carving, engraving, or guilloching shallow ornamenting or markings (marking or engraving metal by the action of a high concentration of electric current B23H0009060000; forme engraving B41C, B41D; engraving by photomechanical reproduction G03F)

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Proposed method includes transmitting control signal by the control unit to the vertical travel drive connected with electromagnetic machine, tool and surface being processed. The first feedback loop is connected in between the electromagnetic machine and control unit so that the rotor or electromagnetic machine armature output signal is transmitted to the input of first feedback loop element representing a displacement pickup. The signal from output of the latter is sent to the control unit first input. The second loop is connected so that the signal from the electromagnetic machine stator control winding is transmitted to the input of the feedback loop second element representing a transducer of the inductance variation signal. The signal from the output of the latter is transmitted to the control unit second input. The third loop is connected so that the signal from the tool is transmitted, via the filter, to the input of third feedback loop element representing a pickup monitoring the gap between the tool and workpiece surface. The signal from the output of the latter is transmitted to the control unit third input.

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FIELD: engines and pumps.

SUBSTANCE: proposed method includes transmitting control signal by the control unit to the vertical travel drive connected with electromagnetic machine, tool and surface being processed. The first feedback loop is connected in between the electromagnetic machine and control unit so that the rotor or electromagnetic machine armature output signal is transmitted to the input of first feedback loop element representing a displacement pickup. The signal from output of the latter is sent to the control unit first input. The second loop is connected so that the signal from the electromagnetic machine stator control winding is transmitted to the input of the feedback loop second element representing a transducer of the inductance variation signal. The signal from the output of the latter is transmitted to the control unit second input. The third loop is connected so that the signal from the tool is transmitted, via the filter, to the input of third feedback loop element representing a pickup monitoring the gap between the tool and workpiece surface. The signal from the output of the latter is transmitted to the control unit third input.

EFFECT: higher quality of produced image.

2 dwg

The invention relates to mechanical engineering and can be used for engraving and milling and other machines with automatic control system of technological parameters when using this equipment for processing hard materials (stone, glass, metal, plastic and others) and improve the quality of the image.

There is a method of printing images, is described in the patent of Russian Federation № 2121444 C1, MKI VW 3/00 "a Device for applying a halftone image on a flat surface polished product. The transmitted signal through the control unit acts on the actuator vertical movement, coupled with an electromagnetic machine, Executive tool and the workpiece surface. Drive device control horizontal movement of the actuator by coordinates X and Y are connected with the actuator vertical movement and connected to the computer via an electronic control device. The method further comprises feedback included between the tool and the control unit.

However, this invention has significant disadvantages: has a low quality and accuracy of the resulting image, low productivity and, most importantly, does not allow for automatic setting of the initial gap tool is a relative of the treated surface.

The technical problem solved by the invention: improving the accuracy and quality of the image while increasing productivity.

The technical problem is solved in that in the method of automatic billing, control and continuous control of the tool position when printing an image on a solid surface containing the signal transmission control unit to drive the vertical movement, coupled with an electromagnetic machine, Executive tool and the workpiece surface, additionally contains feedback included between electromagnetic machine and the control unit so that the output signal of the rotor or armature of the electromagnetic machine is transmitted to the input of the first feedback element made in the form of a displacement sensor, and its output signal is transmitted to the first input of the control unit, or a signal with a controllable stator winding electromagnetic machine is transmitted to the input of the second feedback element made in the form of a signal Converter changes the inductance, and its output signal is transmitted to the second input of the control unit; the signal from the output of the tool is passed through the filter to the input of the third feedback element made in the form of sensor tracking gap tool and the surface of the procurement and, and the output of the third feedback element is supplied to the third input of the control unit.

The method is illustrated in figures 1 and 2.

Figure 1 - diagram of the first variant of the method.

Figure 2 - scheme of the second variant of the method.

The inventive method is carried out as follows.

The first option is shown in figure 1. The signal from the control unit 1 is transmitted to the actuator 2 vertical movement. Actuator 2 signal is supplied to the electromagnetic machine 3, consisting of a stator 4 and a rotor or armature 5, which is connected with an actuating tool 6, the processing surface 7, and the first feedback element 8. The output of the tool 6 is supplied to the noise filter 9 and to the input of the second feedback element 10, made in the form of the displacement transducer, the output of which is fed to the third input of the control unit 1. The signal of the touch tool 6 on the surface 7 is supplied to the control unit 1 from the sensor 10 earlier than the signal from the sensor 8. The control unit 1 generates the correction signal of the movement of the actuator 2. Movement of the actuator 2 with the adjusted speed continues until the tool 6 that is associated with the rotor or armature 5 electromagnetic machine 3 will not touch the surface 7. Since the touch tool 6 surface 7 of the rotor or armature 5 electromagnetic machine 3 beg the onset backward movement relative to movement of the actuator 2. Signal reverse movement of the rotor or armature 5 is fed to the input of the first feedback element 8, the output of which is fed to the first input of the control unit 1. On this signal the control unit 1 captures the fact touch tool 6 on the surface 7 and sends a signal to stop movement on the actuator 2 and the associated electromagnetic machine 3 and the tool 6. Next is the process of accurately placing a gap. This can be used by the signal from the sensor 8 or the sensor 9 or signals from other measuring and measuring and control elements of the actuator 2. This item can be, for example, a stepper motor, in the case of its use in the actuator 2; one step movement of the shaft of the stepper motor corresponds to a certain constant value δ. The size of the working gap must be regulated within a specified range during operation of the whole system. This regulation is provided by the displacement sensor 10.

There is another variant of the method. Under this scenario (Figure 2) process, as in the first embodiment, as long as the tool 6 will not reach the surface 7. The signal source is determined that the touch tool 6 surface 7 is itself an electromagnetic machine 3. As in the first embodiment, since the touch of the tool 6 on the surface 7 of the rotor or I shall or 5 electromagnetic machine 3 begins retrograde motion with respect to movement of the actuator 2, this movement of the rotor or armature 5 causes an EMF in the windings of the stator 4 of the electromagnetic machine 3. When this occurs, a signal change of the inductance of the electromagnetic field, which with the help of the Converter 11 are converted into digital form and fed to the second input of the control unit 1. Signal conversion is carried out using an LC oscillatory circuit, in the role of L which is the inductance of the electromagnetic field of the stator 4. In the LC-oscillating circuit when changing the inductance signal emerges in the form of damped oscillations, which further using different amplifiers (for example, operating with positive and negative feedbacks are converted into continuous waves, the characteristics (frequency, repetition period, amplitude) are information signal of the touch tool 6 surface 7. Analyzing the change of the parameters of the information signal from the Converter 11, the control unit 1 sets the fact touch with precision and gives the signal to stop movement on the actuator 2 and the associated electromagnetic machine 3 and the tool 6. Next is the process of accurately placing a gap, as in the first version.

A possible variant, which uses the signal from the sensor 8 (shown in dotted lines in figure 2) in addition to the signals which the transducer 11, which makes it possible to improve the dynamics of the process control and the quality of the image.

Using the proposed method improves the accuracy and the image quality while increasing productivity and to eliminate the manual operations.

Proposed in the invention method allows you to automatically set the value of the initial gap in the required range and continuously monitor and, if necessary, to adjust its value during the entire session the way that positively distinguishes it from previously known methods.

The method of automatic billing, control and continuous control of the tool position when printing an image on a solid surface containing the signal transmission control unit to drive the vertical movement, coupled with an electromagnetic machine, the tool and the workpiece surface, further comprises a feedback connected between the electromagnetic machine and the control unit, characterized in that the output signal of the rotor or armature of the electromagnetic machine is transmitted to the input of the first feedback element made in the form of a displacement sensor, and its output signal is transmitted to the first input of the control unit, or the signal with the controlled winding is the commutator of the electromagnetic machine is transmitted to the input the second feedback element, made in the form of a signal Converter changes the inductance, and its output signal is transmitted to the second input of the control unit, the signal from the output of the tool is passed through the filter to the input of the third feedback element made in the form of sensor tracking gap tool and the workpiece surface, and the output of the third feedback element is supplied to the third input of the control unit.