CH657303A5 - Device for correcting by bends of a cutting tool an automatic slicer. - Google Patents

Description

657 303 2

CLAIMS b) the cutting process very close to the bands of the

1. device for correcting deflections of cutting material takes place;

the cutting tool of an automatic cutting c) the cutting tool at a location near a previous

machine with a cut made on the cutting tool.

bend sensor, which constantly sends data signals to an electronic 5 In order to avoid such changes in shape,

a circuit which already decides a control program for zip, the thickness of the cutting unit

to enlarge the data processing tool or knife containing the cutting machine in order to assign it a stiffness in the direction and to give the treatment of which which deflections of the cutting tool prevent

Sensor emitted signals as well as achieving one of the should. However, such a solution was unacceptable

Serve the cutting process, characterized in that the 10 since subsequently affects the quality of the material cut.

Deflection sensor a sensor with digital output flow. Consequently, the only possible solution is that which generates a double signal and which for the purpose of applying a correction which would give the orientation of the double signal to the data processing device of the cutting tool with respect to its path, so via a coupling device with the data processing that a resultant force is obtained which is connected to the one device, the control program 15 force of the data processing device causing the deflection of the cutting tool being opposite to routines for correction.

The current technical solution, which routines are intended, among other things, to correct the deflections of the cutting tool parameters, the digital or knife generated by the deflection sensor consists in imparting a rotation to the latter in such a way, a sincante of the cutting tool which is returned by a sensor of the locomotion that, with constant movement of the cutting speed of the cutting tool, along the original path signal and parameters with respect to the material to be cut, the side surfaces of the cutting tool or knife with respect to the material opposite to the cutting process Resistance lent this path from the direction. This will evaluate that. Balance between the on the edges of the header

2. Device according to claim 1, characterized in that 25 tool-acting lateral pressures are restored, so that the deflection sensor for producing a double-the cutting tool is designed in a non-deflected position which retains the presence of a deflection. As a result, the lateral pressures of the cutting tool and the direction of this deflection are compensated for and a deflection disappears if the cutting corresponds. Tool or knife at a certain angle in the

3. Device according to claim 1 or 2, characterized gekenn- 30 bending direction is rotated.

records that the coupling device optocoupler The problem now is the angle of rotation of the contains. To determine the cutting tool. This angle depends on

4. A device according to claim 1 or 2, characterized from various factors, namely, for example:

records that the coupling device infrared transmitter and 1) the running speed of the cutting tool along

-Receiver contains. 35 the material to be cut;

5. Device according to claim 1 or 2, characterized 2) the layer thickness of the material to be cut; shows that the coupling device contains the ultrasound transmitter 3) of the cutting receiver and receiver present during the cutting process. the state;

6. Device according to claim 1 or 2, characterized 4) the deflection, which signs the cutting tool, that the coupling device is high-frequency sensor 40.

which contains and receiver. According to the existing facilities for

7. Device according to claim 1 or 2, characterized by deflections on a cutting tool is intended to indicate that the coupling device is provided with mechanical or the cutting tool with a rotation that contains electromechanical transmission devices. which is proportional to a signal from an am

8. Device according to claim 1, characterized in that the cutting tool itself arranged the load sensor that the data processing device becomes a control program which generates an analog signal of a size which, with routines for storing the previous cutting, is proportional to the pressure which the cutting tool processes present, causing deflections.

States of the cutting tool, as well as with routines for this solution, however, is incomplete, since they end the lead evaluation of the stored states for the purpose of execution 50, the factors causing deflection, for which preventive corrections. that the correction applied to the cutting tool can either be insufficient or excessive, not taken into account.

In addition, this technical solution presents considerable difficulties when practically implemented

When working on cutting a planar surface. Since a correction angle of the path of the cutting tool material, e.g. von Tuch, by means of which one should generally provide an egg which is proportional to the error signal emitted by the analog data processing device, must see this error signal. Cutting machines have already detected changes in shape of the necessarily high ratio of useful signal to cut pieces . Such changes in shape have an interference signal (i.e. a high signal-to-noise ratio) because changes would result in an imbalance in the resultant forces which otherwise would rotate the cutting tool by correction angles, and lateral forces acting on the cutting tool, which are proportional to the interference signals, which is written down. From these findings it was deduced that the quality of the cutting result would result.

on the other hand, there are practical implementations when 05, the technical solution mentioned complicates

a) the material to be cut is not homogeneous and forms of guidings which considerably increase the price of the entire cutter according to the cutting angle different, opposite one another. Since, for example, the cutting tool is subjected to automatic forces; cutting machines in freely rotating

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mechanisms are used, the analog sensors attached to the cutting amplifier on the signal amplifier 11 and a power amplifier 12 must be emitted. The power amplifier 12 also receives a feedback signal, signals are removed via brush devices and via 13 of the current flowing through the motor 3.

Distances, which are usually a few tens of meters. The knife 1 is provided with a load sensor 14, which

are transmitted to a data processing device, s rather as a function of the deflections to which the circuitry for receiving and processing these knives 1 is subjected contains a signal proportional to these deflections. tional signal generated. This signal is an analog signal and

In addition, the sensor provided, which is amplified as an analog sensor, must be amplified by an amplifier 15. With regard to the 1, a very high linearity with complete symbols and also with regard to the fact that the entire device in metry in the two deflection directions is necessary in a broad working and analogous character of the Si region generated by the load sensor 14 have a rotating head piece of the cutting machine to achieve absolutely reliable error signals. is brought, the signal emitted by the sensor 14 must

The commercially available sensors, which fulfill the above-mentioned conditions for a transmission device 16, are extremely expensive. This is the one that contains brushes and rotating tracks. This fact, together with the complex electronics required in order to achieve a high transmission 15, inevitably leads to noise signals, which is why the signal given by the transmission device, the technical solution mentioned, to a considerable extent, of a complex filter arrangement, appears to be disadvantageous , if the practical supply 17 is to be fed in order to suppress the cutting quality caused by the cutting machine as much as possible in order to suppress the interference signals which a poor implementation of the solution is to carry out in order to cause the functioning of the correction device.

improve. The reference number 18 indicates a long length of a line

The device for correcting the device according to the invention, which connects the cutting machine with its control deflections, represents a significant improvement in the device or the computer assigned to it, and enormously simplifies the previously used length. In practice, this length can be several Ten meter values used electrical and electronic equipment, so wear 25. In the control device, the received signal that both economic savings and simple savings are first amplified in an amplifier 19 and then comparative implementation and mode of operation are achieved. For the more recent 20 and 20 'supplied, which work together with a following explanation of the counterpart device 21 according to the invention. The output signals of the mind are referred to the associated drawings, amplifiers 22 and 22 'are supplied from the same 20 and 20', which show: 30 output signals to the inputs of an adder 23

Fig. 1 is a typical block diagram of a device, the long. The output of the adder 23 is connected to a sensor for the known solutions for correcting the deflection control circuit 24, which requires the reception of a cutting tool and is associated with the sensitivity adjustment device 25. Closing

2 shows a block diagram of an exemplary set-up, the signal reaches a computer 2 -controller for correcting deflections of a cutting edge deactivation circuit 26, which is required, tool according to the present invention, which block-if the control program for the cutting process path diagram, as can be seen, contains much simpler than that with a striking change of direction. For this it is a block diagram of FIG. 1. necessary to adjust the deflections

According to the block diagram of Fig. 1 which, as is to be deactivated, i. to switch off at the moment, so that one thinks that a known solution for correcting diameters 40 can carry out this striking change of direction, bends of a cutting tool or knife 1 in a circuit. The circuit 26 outputs the resulting signal to the wide-automatic cutting machine, controls Computer ren input of the first adder 10 mentioned. The motor 3 2 signals for excitation of two main drive shafts, so that the output signal of the ad knife 1 receives via a line 27 moves along a desired path. The computer 2 also has a third task, which is to change or change the angle of the knife 1 to correct it, a rotary motor 3 assigned to the knife 1 controls its deflection.

to be controlled so that the cutting edge of the knife 1 is always located in the direction of travel. Correcting deflections on a cutting tool

For this purpose, the computer 2 continuously determines the speed - an automatic cutting machine contains counterparts and the angles of rotation that are required for each of the motors, essentially using a sensor 28 with a digital sensor. The computer 2 also generates a signal denoted by 0 and a transmission device for a net angle signal which is the desired angular position for the computer 2 '. This correction device is very simple and knife 1 is defined. This 0 signal is inexpensive in a first register, and is nevertheless very reliable since no registration device 4 is stored for the desired angular position. The sensitivity setting and no amplification devices motor 3 is connected to a rotary sensor 5, by means of which there are 55 with a complicated structure, which in the previous case detects the angular position of the knife 1, and with a commonly described speed sensor which makes use of analog sensors 6, whose output signal proportional correction devices are required.

nal is the speed of travel of the knife 1. The digital sensor 28 generates a double signal which indicates the presence of an error and the direction of such an error to the signals from the rotary sensor 5 and the speed sensor 6 to a second registration device 7 for the actual angle 60s, i.e. the presence of a deflection and the direction would be attributed, which corresponds to the data obtained in this way of this deflection. The present correction delivers to a comparator 8. The comparator 8 perceives only the initiation of a deflection of the logical comparison of the stored signals of the regi-cutting tool or knife, but not the size strier device 7 for the actual angular position and the registration of the deflection.

device 4 for the target angular position. The result of this 65. Therefore, the sensor 28 can be of a very simple design. The comparison passes from the comparator 8 to a digital / analogue, since it merely indicates the point in time at which a through-log converter 9 appears the direction of the detected of the two inputs of an adder 10 connected to which a deflection. Since the correction to be made is not pro-

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proportional to the size of the regressive forces acting on the knife 1 'Another advantage of the preparation of the correction of an acting force is no linear characteristic. Deflection of the knife by the computer lies in that of the sensor and the subsequent circuit parts - the fact that the computer for different types of cutting edge. It is recalled that corrections necessary according to the previous processes can be saved, e.g. for the explanations the linearity of the analog sensor 14 was an important cutting of an inhomogeneous material, the cutting was a close factor on which the reliability of the correct edges of the material, the cutting close to the previous device depended. cuts, etc., and in the fact that the computer, on the other hand, since the signal generated by the sensor 28 has digital knowledge of the path on which the knife is of a more advanced nature, the transmission of this signal can be moved for control purposes. As a result, the computer for certain direction or to the computer 2 'can be used in various ways to successfully locate the path, at which, according to previous experience, there is no interference with the signal on the transmission deflections of the knife, prevention path and impair the reliability of the corrections in question.

Correction device would be feared. This immunity Another advantage of the present device is attributed to the simplicity with which digital deflections are corrected.

compared to analog systems, useful and interference signals 15 if the cutting tool or knife of a deflection can be distinguished. the computer is subject to locomotion

Accordingly, it is apparent from Fig. 2 that the speed of the knife from the sensor can automatically decrease until the

28 generated signal to one of the stages 29 and 29 'and the deflection is eliminated. If necessary, the computer can

Closing stages 30 and 30 'containing discriminator automatically also the commissioning of a sharpener. Then the signal arrives at a transmission device 20, which is also controlled by the computer, to direction 31, through which the signal of the sensor 28 to improve the state of sharpness of the knife.

to the computer 2 'of the control device of the cutting system. Another advantage of the present correction device

line connected. The reason for this is that the computer that

The simplicity of the construction and manufacture of the speed of the cutting tool directly controls and the

Transmission device 31 is to be emphasized. Since it receives 25 information from the point in time at which

transmitting signals are digital signals, the signal chem can cause a deflection of the cutting tool that occurs

Transmission or coupling on optical, acoustic feed motors in the absence of the deflection

or mechanical way or by signal showing radio frequency signals always at their maximum speed.

can take place, that is to say, for example by means of optocouplers, can control infrared, whereby the performance of the cutting

Transmitter and receiver, ultrasonic devices, high-dem machine 30 is significantly improved.

frequency transmitter and receiver, mechanical or electrical. In short, the set-up of the available

mechanical transmitters etc. Elaborate and faulty invention characterized in that it corrects due transmission means such as the brushes 16 of FIG. 1 in the deflections of the cutting tool or knife.

known device can therefore be avoided. caused by digital signals, which by a

The Si-deflection sensor transmitted by the transmission device 31 with a digital output signal generated gnal arrives after amplification in a simple amplifier.

32 to the computer 2 ', where it is processed in order to correct the deflection of the knife.

Correction signal 0 and the motor 3 in which acts on the basis of the figure by the speed of travel of the knife.

1 already explained, namely by changing the and the material opposite to the cutting process

Angular position of the knife 1 ', a correction of the deflection 40 brought resistance can be taken into account. Depending

of the knife Y to effect. With 5 'and 6' are corresponding to stored data and previous cutting

1 is a rotary sensor or a speed sensor for the processes in which deflections have occurred,

Knife 1 'designated. preventive corrections can be made.

The speed generated by the sensor 28 and recorded by the computer 2 '. On the other hand, the speed of travel of the double signal taken indicates whether the knife 1' of a 45 knife depends on the difficulty of the cutting.

Deflection is subject and in which direction this process and the deflection pressure that the knife

Deflection runs. The computer 2 ', which is normally exposed, can be adapted.

mode of operation has knowledge of the speed, other important features of the present equipment

with which the cutting tool or knife Y continues to exist is that the feelers are cheap and that they move away, and moreover data relating to the geometric operating life is longer than that of the previous nature of the material to be cut and its hardness and used analog sensors that further the device no

Contains thickness, uses all of this data to determine and delicate electronic adjustments of sensitivity

Delivery of a degree of correction or amplification dependent on the data mentioned with respect to the door signal generated by the sensor, which then requires the electronic signal rotating the knife, and that the device controls the device accordingly to a large extent. 55 is insensitive to system faults, which

As soon as the correction made is sufficient, the deflection of the knife is detected and corrected, that which indicates the deflection of the knife 1 'finally disappears. The present device then has the self-output signal of the sensor 28. If the correction is inaccurate that it is in the If automatic sharpening is possible or excessive, the computer 2 'can again trigger the geo-operations on the cutting tool or knife depending on the position of the knife 1' with respect to its progress from the deflection pressure, which changes during each direction. the cutting process comes into effect.

C.

1 sheet of drawings