DE2523139A1 - CUTTING MACHINE, IN PARTICULAR THERMAL CUTTING MACHINE - Google Patents

Description

Gr ieohelui GrrfoH
"*;: '/, eianrmngskreuzwagen

c- o 1975

Cutting machine, in particular flame cutting machine

My present invention relates to a cutting machine, in.s: ^ special "Ina Breniis ^ hneidrnaschine with a in ner '.-. R» tiickiyn; .- =; rl'3r'.tung niittelo a longitudinal motor movable-vM TräVer to which a scanning head of a photoelectric Dept. of ^l .steuo tion as well as a means of a transverse engine in A'eri ^;. .'I-jk transversely displaceable cutting tool -in ^ e-; is i'dnet and a synchronism with the carrier movable drawing plate carrier.

Photoelectrically controlled flame cutting machines with one Longitudinal and a transverse motor are also known under the term coordinate cutting machines. at Such machines wix-d optically scanned a drawing and the resulting signals via appropriate controls the so-called photoelectric scanning controls - on the Transmit longitudinal and transverse motor to control the tool. Various scanning systems have become known. One of these systems consists in that a drawing on which the workpiece is drawn on a scale of 1: 1 is scanned and this movement is transmitted to the cutting torch. This is with a type of machine, such as by the applicant under the designation coordinate flame cutting machine Statosec sells the scanning head of the photoelectric scanning device) via a push rod rigid with the torch carriage to which the cutting torch is attached is attached, connected.

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We also refer to the DT-AS 2 260 064.

In addition to the scanning of drawings on a scale of 1: 1, facilities have also become known (see, for example, "Technische Mitteilungen", in-house communications from Schoppe and Paeser GmbH, Minden, Issue 4, December 1959, pages to 13 ² O, by means of which the scanning is scaled down In most cases, these machines have a separate encoder machine of the cross carriage type with a coordinate drive, with these machines being used to scan templates on a scale of 1: 5, 1:10, 1: 2.5, I Ά or other scales The output signals of this transmitter machine are transmitted via electrical transmitter systems to the separate kiln machine, which is designed as a cross car.

When scanning scaled-down originals, it is essential that the corresponding scanning control and the The cutting machine carrying the cutting tool and also moving in accordance with the control signals is not uniform are movable. For this reason, the above-mentioned encoder machines also control with electrical signals the cutting machine.

In addition to this electrical connection between the control and the cutting machine, designs are also known become, in which cutting tool and scanning head of the photoelectric control via gear mechanically are connected. Such a machine is illustrated in DT-AS 1 527 268, for example. With this well-known Machine, the movable support to which the cutting tool is attached is designed in a divided manner and with a Toothed rack and gear, so in cross machine direction the cutting tool for photoelectric control in a ratio dependent on the gearbox is movable.

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In the longitudinal direction of the machine, the drawing carrier is turned into a photoelectric one by means of a rack and gear Control moves in a ratio that is also dependent on a gearbox.

A disadvantage of this device, however, is the play that is always present due to the gear arrangements between cutting tool and control, so that unfavorable Influences on the quality of the cut cannot be avoided. In addition, there is increased wear of the transmission parts, which occurs in particular with rapid changes in speed due to changes in the direction of vision during flame cutting.

The object of the present invention is a flame cutting machine of the type mentioned above, which does not have the disadvantages mentioned above and which in particular has a structure that corresponds to the flame cutting machines, which are otherwise only used for cutting according to templates on a scale of 1: 1 are suitable, corresponds.

To solve the problem, it is proposed according to the invention that in a device according to the type mentioned a drawing plate movable by longitudinal and transverse drives is arranged on the drawing plate carrier, and that the longitudinal and transverse drive can also be acted upon by the output signal of the scanning control.

With the device according to the invention it is now possible in the simplest way both according to drawings on a scale of 1: 1 as well as in a smaller one deviating from it Scale to cut workpieces of the correct size (scale 1: 1).

Here there is a mechanical separation between the carrier part carrying the scanning head and the part carrying the cutting tool

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load-bearing support part is no longer required as it is so far with the above mentioned DT-PS I 52? 268 is the case (mechanical separation).

It is of particular advantage that the device according to the invention can be implemented in the simplest possible way by using photoelectric flame cutting machines known per se, which were only suitable for scanning templates on a scale of 1: 1. For this purpose, it is advantageous to arrange a cross slide system on which the drawing can be moved in the longitudinal and transverse directions below a photoscope which is fixedly attached to the cross member and which is no longer mechanically connected to the cutting tools. Furthermore, the output signals of the photoelectric control are to be fed to the longitudinal and transverse drives of the movable drawing plate. It is of course essential that the carrier carrying the drawing plate can be moved synchronously with the carrier. With this arrangement, drawings on a 1: 1 scale as well as on an enlarged or reduced scale can be scanned.

Regarding the scanning of documents on a reduced scale, for which the present invention is particularly is suitable, it is further proposed according to the present invention that the longitudinal drive of the The carrier is in electrical connection with a resolver assigned to the longitudinal motor and is preferred between the drives and the resolvers in each case a, preferably adjustable reduction gear, its Reduction corresponds to the reduction scale of the original to be scanned, is arranged. This becomes a Control circuit created in terms of the scanning accuracy and the tracking accuracy of the tool is particularly advantageous.

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In / Ig. i is; The invention is designated by 10 according to Sohneidrnasohine, in this case eln <-i Ht-ennnGiiiieidmasehirie. The Sohneidma ^ ciiiine has a carrier 13 which can be moved in longitudinal direction 11 by means of a longitudinal motor ^ 12 shown in a scho-n ^ t Isohon. The carrier 13 consists of a carrier part IJa on which a scanning head l · ^ a photoelectric scanning control 1 * 3 is provided. Furthermore, the carrier 13 has a section 1.3b on which a cutting tool 13 is arranged so as to be displaceable by means of a transverse motor 16 in workpiece crossover 17. Da:., .'L ^ inyidv.erkzeiog 18 can be a cutter for soft materials, a laser, a plasma or oxy-carbon torch, a milling cutter or the like. At the same time as or instead of the tendon tool eye, a marking gauge can also be provided which, for example, has a pneumatically actuated punch. The carrier parts 13a and 13b are mechanically firmly connected to one another. A one-piece design of the carrier 13 is also possible. The basic structure of the above described Sohne! .Dinas3h ine 10 corresponds to the structure of the cutting machines which are sold by the applicant, for example under the name Statosec or MuItisec .

As can also be seen from FIG. 1, a drawing plate carrier 20 is attached to a wheel arch 19 serving to support the carrier 13. Thus, the drawing carrier 20 is always synchronous

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with the carrier 13 and thus with the scanning head 14 and the Cutting tool 18 movable. According to the invention is on the sohematically shown drawing plate carrier 20 is a Drawing plate 21 is provided, which can be moved in the longitudinal direction 22 and transverse direction 23 by means of a corresponding drive 24 and 25, respectively is. These drives 24 and 25 are of the output signal the scanning control 15 can be acted upon. On the newspaper record 21, which is below the scanning head 14 and which is only for the sake of a better representation to the side of the scanning head 14 is arranged, the original 26 to be scanned is provided. As also from Pig. 1 is the drawing board 21 Part of a on the drawing plate carrier 21 also has a displaceable lower visor construction 27.

In Pig. 2 is an electrical block diagram of the invention Establishment illustrated. The scanning head is designated by 15, the output signal of which via a 28 designated line and an amplifier 29 to a post-rotation motor 30 are supplied. The post-rotation motor 30 is mechanical connected to the scanning head 14 and a resolver 31, the output windings 32 and 33 of which are used to control the longitudinal motor 12 and transverse motor 18, respectively. The structure of the described photoelectric control is known, so that it will not be discussed in more detail. According to the invention is the longitudinal engine 12 and the transverse motor 1-8 with a resolver 34 and connected, which in turn electrically with the motors 24 and for the longitudinal or transverse movement of the drawing. According to the invention, there is also between the motor 12 and the resolver 34 or between the motor 18 and the resolver 35 are each a reduction gear 36 and 37 respectively.

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The gears are preferably designed as reduction gears, the reduction ratio being the Reduction scale of the drawings to be scanned is equivalent to. The transmission is preferred for scanning drawings with different reduction scales ui'iα 37 with respect to the reduction ratio adjust-Ivv; ' educated.

The operation of the device according to the invention is the following:

At the beginning, the drawing template 26 is pushed under the scanning head, which is firmly clamped to the carrier part 13a, and furthermore, the cutting tool 18 is brought into the desired gate position above the workpiece 38. After that, will by turning on the machine, the photoelectric scanning control put into operation and the two longitudinal (12) and transverse motors i8 according to the resolver 31 output signals controlled. At the same time with the motors 12 or 18 and with the interposition the gear 3β and 37 moving resolver 3 ^ and 35 to the longitudinal (24 or transverse drives 25 of the drawing plate given signals. These signals cause the drawing to be shifted accordingly the course of the line to be scanned below the photoscope in the direction of arrows 22 and 23 respectively Reduction gears 36 and 37 move the drawing relative to the scanning head in a ratio which corresponds to the scale of the reduced template, in other words, based on the invention Control between scanning head I5 and drawing template 26 when scanning an original at a scale of 1: 5, a relative movement of the size factor 1 takes place while at the same time The scanning head and drawing are moved by a size factor of 5 relative to the workpiece.

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The invention therefore advantageously enables the workpiece to be cut on a scale of 1: 1 when scanning a template achieved on a scale of 1: 5.

In the present embodiment, the reduction takes place via a gear. It goes without saying, however also possible and is within the scope of the invention, in the electrical transmission chain between the resolvers 36 and 37 and the longitudinal and transverse motors 24 and 25 to switch corresponding electronic devices, which carry out a corresponding signal filtering. It is particularly important to so-called through-flow storage thought that only from a sequence of impulses every 5th or 6th or 10th (depending on the scale of the template) to the Pass on the corresponding motor 24 or 25. This In this case, the motor is preferably designed as a stepper motor. In addition, it goes without saying possible and is within the scope of the invention the drawing plate carrier not in a plane parallel to the workpiece To arrange level, but in a plane inclined to the workpiece plane. In this case it would of course have to also the photoscope 15 and the carrier 13a accordingly be inclined so that a corresponding shift of the drawing 26 below the photoscope 15 is possible again.

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Claims (5)

Be / ne 6.5.1975 claims 1. Cutting machine, in particular flame cutting machine 'with one in the workpiece longitudinal direction by means of a Longitudinal motor movable carrier on which a scanning head of a photoelectric scanning control as well is arranged by means of a transverse motor in the workpiece transverse direction displaceable cutting tool and with a drawing plate carrier that can be moved synchronously with the carrier, characterized in that a drawing plate (21) movable by longitudinal (12) and transverse drives (18) is arranged on the drawing plate carrier (20) and that furthermore the longitudinal and transverse drive (18 Y _x . output signal of the scanning control (I5) can be acted upon. 2. Flame cutting machine according to claim I ₃ characterized in that the longitudinal drive (12) is electrically connected to a resolver (3 ² J-) assigned to the longitudinal motor (24) and the transverse drive (18) is electrically connected to a resolver (35) assigned to the transverse motor (25). 3. Flame cutting machine according to claim 1 or 2, characterized in that between the drives (12,18) and the resolvers (34,35) each have a preferably adjustable reduction gear (36,37), whose reduction ratio corresponds to the reduction scale of the drawing to be scanned (26) corresponds, is arranged. 4. flame cutting machine according to claim 1 or 2, characterized in that in the electrical Transmission chain between the resolvers (36,37) and the motors (24 and 25) signal filter devices are provided. 6G9850 / 0G84 Blank page