DE2842907A1 - METHOD AND DEVICE FOR FLAMEING A WORKPIECE - Google Patents

Description

MESSER GRIESHEIM GMBH MG 1153

Password: V 11 - Flamming pass EM 853

Inventor: G. Münch File: IV

Method and device for scarfing a ^T ; 7 piece

The present invention relates to a method for scarfing a workpiece, according to the method on the workpiece surface several juxtaposed scarfing passes are provided and continues to concern one Apparatus for carrying out this process.

It is often necessary to have the workpieces produced in ingot or slab casting systems on their surfaces to flame, as these are fraught with defects, such as cracks, which make further processing of the Do not allow workpieces.

A scarfing machine is used for surface treatment Use as described, for example, in DE-PS 1,947,284. Because of the width

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the workpiece surface (up to 2500 mm) it is necessary to flame this area in several steps (flame pass).

The scarfing machine is controlled semi-automatically. The machine moves - controlled by an operator - to the workpiece to be flamed like this until the flame burner is at the starting point on the workpiece. After positioning the flame burner, the correct height distance of the scarfing torch in relation to the workpiece surface is determined here is set, the so-called flame switch is used. Heating flame ignited and the scarfing start initiated. All functions now necessary such as preheating flame - Oxygen in - Flame feed in - Granulation water in - are programmed via a Time control switched automatically without the operator in the starting sequence and himself then, the subsequent scarfing process intervenes "

When the end of the first scarfing pass from the scarfing burner has been reached, the operator actuates the scarfing switch again and all of them now

ι ι necessary control functions such as scarfing oxygen off granulation water off - scarfing burner start up scarfing feed off, are now switched via the programmed time control.

The scarfing machine then moves back to its starting position, the scarfing burner is extended by its width (ist equal to scarfing pass width) shifted to the side and repositioned. With renewed actuation of the so-called flame switch the scarfing start - as previously described - is initiated and the flaming of the second pass is carried out, until then at the end of this second pass

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renewed manual actuation of the scarfing holder, the scarfing process is ended. This process is repeated until the entire surface of the workpiece is flamed.
5

The object of the present invention is, the above described scarfing process even more widely automate.

To achieve the stated object, it is proposed according to the invention that the scarfing parameters (scarfing pass scarfing time) of the first plamming pass as a starting value for the subsequent, automatically reproduced Flame passes can be used.

In a preferred embodiment of the arfindun-o-Gomä.3en y procedure i-; ird the Lallte the first Fl & napassec determined and this measure for each subsequent one Flammability pass used as a reference.

Alternatively, it is of course possible and lies within the scope of the invention, according to a further embodiment, to determine the duration of the first scarfing pass and to use this ^T .. 'ert as a reference value for each subsequent subsequent scarfing pass.

To carry out the inventive method, a length measuring device for determining the length of the first Flämmpasses is or, alternatively, according to a further proposal of the invention _s a Zeitmesseinrich processing for determining the Plämradauer the first Flämmpasses provided.

In the attached drawing, a is shown in simplified form known scarfing machine shown with which

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OBlGiNAL

the method according to the invention can be carried out.

As can be seen, the scarfing machine 10 consists of one Machine carriage with control cabin 12 for the operator and a boom 14 on which it can be moved transversely and a scarfing burner 16 is arranged in a height-adjustable manner.

The scarfing machine 10 can be moved longitudinally on rails 18. Parallel to the rails 18 is one to be flamed Workpiece, e.g., a slab 20, is provided.

In the control cabin 12, a simplified control panel 22 is provided which has a main switch 2Ά . By operating the main switch 24, the scarfing burner 16 is controlled by the operator to the starting point 26 at the beginning of the slab 20. After positioning the flame burner Io at the starting point 26, the scarfing switch 23 is actuated, whereby the scarfing process is now initiated and carried out.

According to the invention, after the Flärnm burner 16 has been positioned and before the scarfing switch 28 is actuated an automatic switch 30 is switched through which a length measuring device 32 or a time measuring device 34 is put into operational readiness. The real one The device 32 (or 34) is switched on

then with actuation of the scarfing switch 28. 30

During the subsequent scarfing of the first Scarfing pass 36 moves the scarfing machine 10 according to the length of the scarfing pass to the end of the slab 20.

The length of a flame pass is not always the same as that

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Slab length, but often it also happens that only part of the slab surface is flamed (selective - Flaming), so that you can see the length of the plaster pass and with it the piämmäauer also reduced accordingly. 5

At the end of the Plämrnpasses 3o the operator actuates the scarfing switch 28 again, whereby the aforementioned punctures to end this scarfing process are initiated and the scarfing machine returns to its starting position. The length measuring device 32 (or the time measuring device 34) is then switched off. In this device 32 (3 ² O is now the length (duration) of the first scarf pass including the return path

¹ ^ saved.

After the scarfing machine 10 has moved back and the scarfing burner 16 has been positioned at its new starting point for scarfing the adjacent second scarfing pass 33, a program start switch 40 is now actuated, so that the scarfing parameters (3 ² I-) stored by the device 32 (3 2 I-) in the first scarfing pass ( Flammpass length - scarfing duration) now for further scarfing

are "on call".
25th

! ■ lit:; ctlltiG ^un S ' ^: ' - ^es '.?! iLiXisc holder α 23, the scarfing parameters stored in device 32 (34) automatically initiate and carry out the scarfing process, whereby at the end of the "programmed" second scarfing pass, the scarfing burner now switches off in the previously described manner without pressing the scarfing switch again and then returns the machine to its starting position.

The distance (time) in which the scarfing machine in

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BATH ORIGINAL

Rapid traverse from the end of the Plärara pass to the new starting point (required) is thus also ^{stored in the device 32 (3 2} O. With the start of the second flame pass, the clic operator only needs to position the flame burner 16 by means of the main switch 24 and to operate the flame switch 23 so that the flame start and the subsequent scarfing process, the parameters of which are stored in the device 32 (34), thus run completely automatically.

This automatic scarfing process can be supplemented in the manner according to the invention so that the setting of the scarfing burner 16 in the respective new starting point for the subsequent scarfing pass is also entered in the device 32 (3 ² I-). Since the width of the scarfing burner (is equal to the scarfing pass width) and also the speed and the required scarfing burner distance from the surface of the square are known, the corresponding setting parameters can easily be determined and ^{stored in the device 32 (3 2} I-). The same also applies to the workpieces whose length and thus that of the scarfing pass or the scarfing duration are already known.

To save this additional information is According to the invention, a programming device 42 is provided on the control panel for this purpose, through which, in connection with the device 32 (34) a completely, automatically running scarfing program can be created without this after the initiation of the scarfing start by the operator must intervene again in the scarfing process. The activity of the operator thus extends throughout the entire scarfing process only on a monitoring function.

St / Eo Pfm., August 17, 1978

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Claims (5)

Patent claims: ^ l. Method for scarfing a workpiece, according to the several scarfing passes arranged next to one another are provided on the workpiece surface, characterized in that dr, ß the scarfing parameters (Scarfing pass length, scarfing time) of the first scarfing pass as a starting value for the subsequent, automatically reproduced scarfing passports are used. 2. The method according to claim 1,. ■ characterized in that the length of the first flame pass is determined and this measure for every next subsequent 'flame pass is used as a reference value. 3. The method according to claim 1, characterized in that the duration of the first scarf pass is determined and this value for each the next subsequent scarf pass is used as a reference value. 4. Scarfing device for carrying out the method according to claim 1 and 2, characterized in that a length measuring device £ 32) for determining the length of the first scarfing pass C36 ") is provided, 5. scarfing device for performing the method according to claim 1 and 3, characterized in that a time measuring device 04) is provided for determining the scarfing duration of the first scarfing pass (36), St / Ho Pfm, Χ7.Θ.1978 »MG 11 ⁵³ D30018 / Ö1IJ