CH616520A5 - - Google Patents

Description

The invention relates to a device according to the preamble of claim 1.

Here, division is understood to mean the planning-related sharing of a cutting plate opening of a cutting tool in the sense of tool-technical optimization, irrespective of whether it is implemented or not. In the past, the entire design of cutting tools for punching sheet metal was carried out by skilled and experienced designers. In recent years, new aspects of the construction process have emerged with the help of mechanical and electronic devices.

In this context, reference is made to CH-PS 540 526, 578 986 and 596 942 and the following IBM New York Scientific Center Reports and the references cited therein: Report No. 320-2006 “An Approach to the Two Dimensionai, Irregular Cutting Stock Problem "by RC Art, Jr., September 1966; Report No. 320-2921, «Marker Layout

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Problem Via Graph Theory ”by Okan Gurel, January 1968; and between both cutting plate openings A, B, so that the

Report No. 320-2965, “Circular Graph of Marker Layout” of the arrangement shown in FIG. 5 is not permitted.

Okan Gurel, February 1969. For the basics of the subsequent object of the invention is to create a cutting tool construction see z. B. Lueger, “Lexicon of the type mentioned at the beginning, which makes it possible to use two cut-and-saw technology”, Stuttgart, Vol. 9, pages 282 and 283; Double breakthroughs to be examined to determine whether they are compatible with their "dividing lines", "Taschenbuch für den Maschinenbau", Vol. II, 13th edition. This task is solved by Berlin-Heidelberg-New York, pages 660-665 and Dallas, "Pro- the characteristic features of claim 1, gressive dies", New York-Toronto-London, 1962, pages 1,2,64 such Establishment allows to be objective and confident65. A check for the admissibility mentioned above has so far only been possible for follow-up cutting tools to be carried out exclusively by quaio, whereby the result has been constructed in the form of qualified electricians who are indicated on the basis of their signals and the facility made its decisions based on adaptable knowledge and experience. However, the fact that it is inserted into different and different types of equipment can usually only be added with simple follow-up cutters> in the design of follow-up cut tools, where only the width of the intermediate webs is used as a criterion for tools.

represents for the arrangement of the cutting plate openings. Is particularly advantageous configurations of the device

This applies, for example, when machine processing is described in claims 2 to 8,

processing method the production of a closed on all sides. An advantageous embodiment of the

Holes in the cutting plate are permitted, as is described below in the case of the electroerosive device with reference to the drawings (EDM), in drilling methods and in manual filing.

or clearing procedure is the case. In all other cases it is 20 pjg \ ejn'e establishment;

indispensable or desirable to split the cutting plate around the pjg 2 an analyzer circuit used in Figure 1;

Breakthrough contours z. B. with a grinding wheel pjg 3 ejnen analyzer of the analyzer circuit of Fig. 2;

to be able to. The cutting plate parts each contain a section, FIG. 4, a switching and control device for setting up the contour of the relevant cutting plate opening. If the Fig. 1; and then you put all the cutting board parts back together correctly, 25 pjg. 5 and 6 sketches for explanation on the basis of an im together they limit the cutting plate breakthrough, the plan rectangular cutting plate with two also right

at least two cut-out cut-out openings starting from its circumference, FIG.

has no. These division lines cannot be in accordance with the invention up to the sentence 5.

Extend the circumference of the cutting plate, but in other subsequent cutting tools they may have to end in the various ren cutting plate openings or also in the cutting plate 30 cutting plate openings along the subsequent cutting tool. . ... be distributed, with each insert breakthrough one

Specific workstation is assigned for the starting points and directions of the dividing line. This assignment of each insert breakthrough is the prescribed one is to insert the insert into the feed direction.

Take into account the shape of the latter as well as the processing aspects of handling - hereinafter also referred to as the horizontal direction x. It is not possible to move a cutting plate 35 _ by an integer number of the

Breakthrough to be divided so that deep or difficult to access genes. The strip of material is then gradually during operation

Indentations in one of the cutting plate parts arise because they move along the subsequent cutting tool and in each station a grinding device is not machined into such indentations.

can be. The device of FIG. 1 contains a signal group memory-rectangular cutting plate opening having two dividing lines 40 and 10 for storing position-independent outline coordinates, which from the end points of its major axis in single-signal and dividing-line signals, specifically in point outwards in opposite directions. From ren memory sections per cutting plate opening. Location-reasons of economy and production speed-dependent means that the signals regardless of the location, speed is sought, as much cutting plate breakthroughs as d. H. Cutting station breakthrough station can be installed in a cutting board in the subsequent work, but the tools are 45. In contrast, the memory 10 can also be used for storage difficulties with the number of cutting plates rather depending on the position, ie. H. the signals of a breakthrough to be compared are growing strongly. The number of cutting plate parts outline shape used, by contrast, should be small by adding one. The number of dividing lines emanating from a cutting plate - the algebraic product from the feed path and the breakthrough is at least the size corresponding to the workstation number to the position two. If only one part-dependent x-coordinate signal of a cutting plate penetration line is based on a cutting plate opening, a division of the cutting plate is impossible. break is assigned to a specific workstation. More intricately shaped die cutouts may require a switch and control device 16 but will require more than two dividing lines. In general, memory content is fed to an analyzer circuit 18 which examines the dividing line from its starting point on the outline; examines signal groups stored in both registers, the cut-out breakdown like a tangent normal to 55 Qb on each side of the connecting web, one of the outputs of this point and points outwards with it the formation of the apex of the dividing lines is arranged and whether the two zer angles or corners on the cutting plate parts avoid assigned dividing lines in the same direction, ie. H. Nei-wfrd- .... and thus the two cutting plate penetrations

Since a cutting plate does not have any number of cutting plate breaks A, B with respect to their dividing lines and can be divided as desired, they are 60 bar. The work station number is only permissible in a multi-cell arrangement of the cut-through openings of the station number memory 14 and a feed memory 12 in a cut plate. Such as B. Fig. 5 shows, is stored. The number of cells in the memory 14 corresponds to the second cut-through opening in the cut plate in an inadmissible number of memory sections in the signal group memory 10, since the dividing line Bb of the device of FIG. 1 cannot be properly used in a sequentially working cut-through opening with the division 65 process in connection with other devices ver-line La of the second insert opening A can be used, which can be the station numbers of the different. Set additional connecting lines or cutting plate cutting plate breakthroughs and with the aid of the outer breakthroughs usually do not fit into the interspace signal signals of the device of FIG. 1 determine whether the

616520

Arrangement of the cut-through openings, which is indicated by the station numbers, is not permitted in the above sense. This test is typically used in addition to other tests that relate to the geometrical integrity of the outline shapes and other factors, so that an arrangement can finally be selected that meets all the conditions of the secondary cutting tool construction (see CH-PS 540 526).

The device of FIG. 1 can process outline coordinates of cut-out openings with different levels of complexity. To explain this, there is a restriction to four outline coordinates per insert opening, which correspond to the maximum and minimum x coordinates that lie in the feed direction of the subsequent cutting tool and the maximum and minimum y coordinates of the outline shapes of an insert opening (Xx, XN, Yx and YN). The corresponding signals can be stored as capacitor cell voltages proportional to the contour coordinates or in some other form. You can e.g. B. reproduced in digital form and stored in binary form (z. B. in a magnetic core memory) or in another form. Here the outline coordinate signals are to be stored as analog voltages, which are each proportional to the numerical value of the coordinates.

To simplify matters, the dividing lines are only expressed by their basic directions, namely right, left, up and down (R, L, T and B). The four memory cells for storing these dividing line signals can be embodied essentially in binary form, a voltage deviating from zero indicating a dividing line starting from a certain cutting edge opening, while a voltage value of zero means that no dividing line originates from there. Thus, a positive, non-zero voltage is stored in the corresponding memory cell to represent a division line.

In summary, it can be stated that the first cutting plate opening A is defined by four outline coordinates XXa. Xna, YXa. Yna and two of the four dividing line directions RA, LA, TA, BA is completely described, and analogously, the description of the second cutting plate opening is made by replacing index A with index B (FIGS. 5 and 6).

It should be noted that the values do not necessarily have to be saved for this purpose as long as they are available to the facility when needed. For example, the complete outline coordinate signals could be derived again by scanning the outline each time they are needed (see CH-PS 540 526).

For each cut-through opening, the outline coordinates and dividing line signals are stored in the memory 10, which consists of a memory cell array which is divided into groups (10a, 10b, 10c ...) of eight cells each. These eight cells are for the horizontal maximum value and the horizontal minimum value (Xx and XN) as well as for the vertical maximum value and the vertical minimum value (Yx, YN) as well as for the direction indicators of the dividing lines in the four directions (R, L, T and B) ) of an insert breakthrough, the index A relating to the first insert opening A and the index B relating to the second insert opening B.

The memory 10 is via the switching and control device 16, which u. a. includes a simple multiplier 24 and adder 30 connected to the analyzer circuit 18. The switching and control device 16 routes signals from and to the various memories 10, 12, 14, the input 20 and the analyzer circuit 18. The result is taken in the form of a signal from the output 64.

The switching and control device 16 of FIG. 4 can contain a bi-directional scanner 22, of which only two connections are shown, and through which input information characterizing the outline shape initially as position-independent signals of the circumferential coordinates and dividing line coordinates from the input 20 in succession in the groups 10a, 10b, 10c ... or 14a, 14b, 14c ... of the memory 10 or 14 are stored when the scanner 22 is switched on in succession. The feed is stored in the feed memory 12.

In the next step, the outline coordinates or outline coordinate signals that are actually to be compared are determined. This means that any outline shape in the horizontal direction, i.e. H. is brought to their test station in the feed direction of the material strip to be processed. This is done by reading the contour coordinate signals one after the other from the memories 10, 14 with the aid of the scanner 22. Each work station number from memory 14 is closed by closing switch 26 and each feed signal is fed to multiplier 24 via line 28. The resulting product corresponds to the distance by which the horizontal coordinates of the position-independent outline coordinates have to be shifted and is fed to the adder 30 via a line 32. The position-independent horizontal coordinate signals of the outline shape, which were sampled by the scanner 22 at this time, are also fed to the adder 30. These coordinate signals, which define the horizontal position of the cutting plate opening or its outline shape if it were located in the first work station of the subsequent cutting tool, are applied via a switch 36 which is closed at this time and via a line 34. The resulting sum corresponds to the horizontal coordinates of the outline shape which has been shifted to the work station indicated by the number stored in the memory 14 and is re-entered into the memory 10 via a switch 38 and the scanner 22. After completion of the scanning process, all horizontal coordinate signals of each outline shape with a non-zero work station number have been shifted to the work station number assigned to them and then entered again in the memory 10. In some applications, an outline shape is not assigned to a workstation number until it is ready for testing. In other applications, all outline shapes are assigned workstation numbers from the start. With the aid of the device described here it is then determined whether two cutting plate openings with regard to their dividing lines in one and the same divided cutting plate are permissible.

The next step is to actually check the admissibility of one or more outline shapes. When testing a specific outline shape, for example on the basis of the outline coordinate signals stored in the memory cell group 10c, a presetting device 40 is used to advance the scanner 22 for the selection of these outline coordinate signals and to place them in a register via a line 44 and a switch 46 which is closed at this time 42 to save.

The scanner 22 is then reset to sample all of the outline coordinate signals stored in the memory 10 along with their associated work station number signals which are stored in the memory 14. The work station number signals are checked sequentially in devices 48 and 50 to determine whether the currently scanned outline shape a) has been assigned a work station number zero (which, according to the above, means that this outline shape should not be checked at this time) , or b) whether this outline shape is the same whose signals were previously stored in register 42. If the currently scanned outline shape does not meet any of the test conditions specified above, it is connected via a line 54 in

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a second register 52 is entered, whereupon it is compared in the analyzer circuit 18 with the outline coordinate signals stored in the first register 42 (FIGS. 2 and 3). Each outline shape in memory 10 can be compared to any of the other outline shapes stored therein.

The mechanism works as follows:

1. The outline coordinate and dividing line signals of each insert opening are transferred to corresponding sections of the memory 10 and stored there.

2. The feed and work station number of each outline shape are transmitted in the form of signals from the input 20 to corresponding sections of the memories 12 and 14, respectively.

3. The scanner 22 scans the cell groups of the memory 10 as well as the cells of the memory 14 containing the work station number of each insert opening. The switching and control device 16 reads the value of two x-coordinate signals from each group and adds them to the product of the feed signal and the work station number signal with the aid of the multiplier 24 and the adder 30, respectively Signal groups indicate the arrangement of the cutting plate openings on the floor plan of the cutting plate. The cut-through openings are not involved in the test,

whose workstation number is zero.

4. The scanner 22 samples the groups in the memory 10 and passes the signals to the analyzer circuit 18 which compares them with corresponding signals of the cut-out break under test which are stored in the register 42, wherein a signal from the presetting device 40 can indicate which cut-out break-through is to be used constantly for the test comparison. The switching and control device 16 selects each group (except those with the level number zero and the comparison group itself).

In the event of an established admissibility, the analyzer circuit 18 does not emit an admissibility or yes signal. In the case of an inadmissibility, on the other hand, it emits an inadmissibility or no signal in order to repeat the determination with another arrangement.

Typically, in an intermediate stage of the insert design, some insert openings have been placed in a final work station.

Other insert breakthroughs (identified by station number zero) have not yet been classified, and one of these insert breakthroughs is being tested in various workstations to determine where it fits best. A preliminary test can be carried out on the basis of compatibility with other insert openings already inserted with regard to the geometric distance, the material strength or both. Once a work station has been found on a trial basis that is permissible with regard to the preliminary test mentioned above, the present device is used to continue to determine whether the trial arrangement of the relevant cutting plate openings is also permissible with respect to the dividing lines.

FIG. 2 shows how the connections produced by the switching and control device 16 are made in detail. The registers 42, 52 correspond to the comparison group or one of the other groups (for example the group 10c) from the memory 10. For reasons of clarity, the connections between the different cells in the registers 42, 52 are marked with a ( 56) of four internal analyzers 56, 58, 60, 62 of the analyzer circuit 18. The connection to the three other analyzers 58, 60, 62 is made according to the label. The outputs of the four analyzers 56, 58, 60, 62 are connected to the common output 64 via diodes.

3 shows the circuit diagram of one (56) of the analyzers 56, 58, 60, 62. Each analyzer has eight inputs 66,68,70,72,74,76, 78,80 (Fig. 2 and 3) which lead to five differential amplifiers 82,84,86, 88,90. The first three differential amplifiers 82, 84, 86 each provide an output voltage that is proportional to the difference between the signal values at the assigned plus and minus inputs. The value of the output signal of the differential amplifier 82 is e.g. B. only positive if the signal value at input 66 is greater than that at input 68.

10 In contrast, the inputs 78.80 are connected crosswise to the differential amplifiers 88.90, so that one of these two amplifiers generates a positive output signal if the signal values at the inputs 78.80 are different from one another, regardless of which of the two signal values 15 is bigger. Thus, the amplifiers 88.90 have an antivalence function.

The outputs of the amplifiers 82, 84, 86, 88, 90 are each connected to a clamping voltage source 20 (voltage + VC) via a small, equally large resistor RA and a clamping ping diode 92, 94, 96, 98. This means that no output voltage can exceed the voltage + VC, even if the input signals differ by a much larger amount than the minimum difference corresponding to the output voltage + VC. The five clamped outputs of the differential amplifiers 82.84.86.88.90 are connected to a common connection point 102 via five equally large resistors RA. The latter is connected to the output 64 of the device via an output diode 104 and to a negative reference voltage -VN via a resistor Rb. The resistors RA, RB are to be dimensioned such that a clamped output voltage with the value + VC of four "or more of the five differential amplifiers generates a positive voltage at the connection point 102, so that as a result a signal can be transmitted through the output diode 104 35 For example, if the voltage + VC is +1 and the voltage -VN is -3.5 V, resistance values of 1000 ohms for resistors RA, RB are suitable values for this purpose.

If, according to FIG. 5, the cutting plate opening B (vertical dividing lines TB, Bb) lies completely on the left side of the cutting plate opening A (horizontal dividing lines LA, Ra), then no cutting plate opening is completely above or below the other. Both cutting plate openings jointly delimit a connecting web, which is vertical in FIG. 5. At one edge of the latter there is a starting point, namely that of the dividing line LA. There is no starting point on the opposite edge, which means that such an arrangement of two cutting plate openings A, B in one and the same cutting plate is not permissible because such a cutting plate is not divided in a manner that is not technically flawless by Hesse. Admissibility presupposes that two starting points are arranged on both sides of the connecting web and that the dividing lines have the same direction.

55 In the case of FIG. 5, the analyzer 56 supplies an output signal, which means that the cut-out hole B lies completely on the left side of the cut-out hole A (XAN> XBX). This is determined with the aid of the differential amplifier 82, a voltage of +1 volt reaching at the connection point 102 (assuming the values given above as an example). The relationships Yax> YBn and YBX> YAN, determined in a similar manner, show that no insert opening is completely above or below the other. These two relationships are determined by the Dif-65 reference amplifiers 84 and 86, as a result of which at least one additional voltage of + 2V reaches the connection point 102. Since there is a division line LA, but the left edge of the connecting web is not occupied (i.e. from

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no parts RB) are arranged on both sides of the connecting web on the right side of the cutting plate opening B. This line RB goes out) is the antivalence condition of the diffe arrangement is therefore permissible. However, since the two dividing lines meet the reference amplifier 88.90, which means that an additional span does not align with one another, they must reach the connection point 102 within the + 1 V connection, so that the boarding bridge is connected to each other by a connecting line C - a total voltage of +4 volts results. Thus the end will be 5. The division then takes place along LB, RB, C, La, Ra. output terminal 64 is supplied with an output voltage which is clear to the person skilled in the art that this determination indicates by means of purely inadmissibility. Such a display can be used in several digital devices and in calculation and storage types, as described above. all values used in the analog circuit in one

The three other analyzers 58, 60, 62 provide a read-write memory under the control of a hard-wired signal when the board break B to the right of the tenth or memory-programmed step control signals is possible Board break A, below the board. The presence of more than four contour coordinates, opening A or more than two cutting plate openings per divided cutting lies above the cutting plate opening A, as can be readily determined with reference to FIG. 2, plate and / or more than two dividing lines per cutting plate. breakthrough only requires adding similar building

The analog test of the arrangement in FIG. 6 shows that there are groups in the analog case or the further repetition of two of the starting points (namely that of the dividing line LA and work steps in the purely digital case).

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Claims (8)

616520 PATENT CLAIMS 1.Device for determining whether in a subsequent cutting tool, which has stations with a divided cutting plate, in the latter at least two cutting plate openings (A, B) are compatible with one another in terms of machining with regard to their dividing lines (R, L, T, B), with each cutting plate opening (A, B) has at least two dividing lines and a) outline coordinate signals defining its outline (Xx, XN, Yx, YN) and b) dividing line signals, each of which relates to one of the two dividing lines (R, L, T, B) their starting point is defined, determined, and with respect to their direction on the assigned outline and with respect to their direction, and both cutting plate openings (A, B) delimit a common connecting web in the cutting plate floor plan, characterized by a first register (42) for storing a first signal group consisting of contour coordinate signals and dividing line signals of a first cutout opening (A), a second register (52) for storing a second signal group consisting of contour coordinate signals and dividing line signals of a second cutting-edge opening (B), - An analyzer circuit (18) which examines the signal groups stored in both registers (42, 52) to determine whether one of the starting points of the dividing lines is arranged on each side of the connecting web and whether the two assigned dividing lines (La, Rb) have the same direction and thus the two cutting plate openings (A, B) are mutually compatible with respect to their dividing lines. 2. Device according to claim 1, characterized by - a first memory (10) for storing signal groups from outline coordinate signals and associated dividing line signals of a plurality of cutting plate openings, - a selection device (22, 46) for selecting a first signal group from the plurality of signal groups and for storing the first signal group in the first register (42), and a scanning device (22) for scanning all other signal groups and for sequentially feeding them as second signal groups to the second register (52), wherein the analyzer circuit (18) responds successively to the first register (42) and the second register (52) and examines whether the first insert breakdown corresponding to the first signal group is compatible with the insert openings to be compared corresponding to the other signal groups or not. 3. Device according to claim 2, wherein the scanning device (22) contains a device which first successively in the first memory (10) a plurality of signal groups of position-independent, i. H. irrespective of the location of the cutout openings in the subsequent cutting tool, stores outline coordinate signals corresponding to the number of such cutout openings, characterized by a second memory (14) for storing signals of the station numbers of the cut-out openings, - A third memory (12) to store feed signals corresponding to the size of the feed path of a strip of material to be processed between the stations of the sequential cutting tool, and - A conversion device (24, 30) for successively converting the position-independent outline coordinate signals for each station depending on the station number signals and the feed signals into the signal group of the outline coordinate signals to be used in the compatibility determination for this station. 4. Device according to claim 3, characterized in that the conversion device (24, 30) has a multiplier (24) for successively multiplying the station number signals by the feed signals, the resulting products corresponding to the respective distances of the position-independent coordinates (X) in the feed direction, an addition device (30) for successively adding the products obtained and the position-independent coordinate signals in accordance with the feed direction in order to generate the outline coordinate signals to be compared. 5. Device according to claim 1, characterized in that the analyzer circuit (18) has at least one analyzer (56,58,60,62) with the following components: - an outline comparison device (82, 84, 86) for comparing the first and second outline coordinate signals in order to determine the relative spatial relationship between the first and the second cutting plate opening (A, B), respectively - a dividing line direction comparison device (88, 90) for comparing the first and second dividing line signals and determining whether the cutting plate openings (A, B) have dividing lines (RB, LA) which extend on both sides of the connecting web and have the same direction, and a decision device (RA, RB, 92,94,96,98,100, 104) to determine whether depending on the outline comparing device (82,84,86) and the dividing line direction comparing device (88,90) the first cutout opening corresponding to the first signal group and the second cutout opening corresponding to the second signal group are compatible with respect to the dividing lines (FIGS. 2, 3). 6. Device according to claim 5, characterized in that the outline comparison device (82, 84, 86) contains several groups of comparison assemblies, each group being used to determine a specific spatial relationship between the two cutting plate openings (A, B) ( Fig. 3). 7. Device according to claim 6, characterized in that the dividing line direction comparison device (88, 90) contains a plurality of exclusive OR modules, each of which is assigned to a comparison module (FIG. 3). 8. Device according to claim 7, characterized in that the decision device (RA, RB, 92,94,96,98,100, 104) contains detector devices, each of which determines, depending on the groups of comparison modules and exclusive OR modules the cutting plate openings are mutually compatible with respect to their dividing lines (FIG. 3).