DE1752977A1 - Tube bending machine - Google Patents

Description

Oberhauaen, August 14, 1968 Sch / Fr

Serial No. 1497

PATBNTREMELDUNa

Drilling bending machine

The invention relates to an automatically controlled pipe cold bending machine For bending pipe coils from individual straight pipe sections, which are used for dimensioning the pipe coil lengths has a stroke performing carriage with a pipe clamping device and a stroke measuring device, wherein after bending the pipe sections of the remaining legs of one bent pipe section with the starting leg of the other pipe section so to be connected that both leg lengths together result in the desired leg length

Such pipe bending machines are known (z. B. US Pat. No. 2,565,940), the bending gears are hydraulically operated and controlled by cam disks from a skin. The pipe snake pieces produced must be re-straightened and the start and end leg lengths sawn off exactly to size (e.g. German patent specification 1 080 837).

A greater accuracy of the pipe coils can be achieved by controlling the bending processes, for example

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electronic control known from automatic tool machines is transferred to carry out the bending operations. With this known control method, therefore, great accuracy of the bending and lifting processes can be achieved because the executed movements of the machine are measured by a measuring device, and the measurement result in each case for Completion of the movement process to the electronic Control is reported back. You can use the electronic control system to control the bending and lifting processes you have commanded. ter way are abandoned by punched tape.

For the execution of the connection with the rest of the leg of the a snake tube piece and the start leg of the other 3 snake tube piece by feeding was always up to now a subsequent passport work was necessary, which caused pipe waste and made the pipe coil packages more expensive.

Bs is the task of the invention, the cold pipe bending machine so to control that for the connection of the individual pipe serpentine pieces on these no more fitting work is necessary and the Accumulation of high-quality waste is avoided.

You invention is that sine Hubmeßvorrichtung the Sinspannwagens, which is also the Hubmeßvorrichtung the can be electronic control, automatically measures the length of the remaining leg of a snake pipe piece and with this measurement result controls the stroke of the clamping carriage

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for dimensioning the length of the start of the leg of the next iSnake tube affected. This has the advantage that, for example, a coiled pipe for a Package of a steam generator is bent in one go from straight pipe pieces of various lengths so that the Connecting the individual pipe coil pieces no fitting work is necessary and no waste pieces are incurred.

When using a known ^

electronic control, which the program is given in a known manner by punched tape, the program for the measuring and Hubbeeinfluenzungsvorgang according to the invention can also be entered at the appropriate points between the bending and turning processes of the punched tape program, which is only carried out if the ^ eα device detects a residual leg.

The location of the end of the rest of the leg can be used for Implementation of the measurement according to the invention can be determined in various ways, for example the stationary pipe be sensed by a crouch of the moving heating device, which actuates a switch when the end of the pipe leg is rotated, or a beam of light falls on a light-sensitive cell and thus changes its resistance value, when the Keüeinrichtung has reached the end of the pipe, or the The induction value of a coil is changed when it leaves the end of the pipe.

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The invention is explained by way of example with reference to the drawing. It shows"

Fig. 1 an explanation of the task, Fig. 2 a partial representation of a quay tube bending machine in plan view, which has curved a Hohrstück serpentine, and

FIG. 3 shows the same plan view of the cold pipe bending machine as in FIG Fig. 1, which, however, is to begin with the bending of the next piece of pipe.

Fig. 1 shows a snake tube far from a 3-snake tube package a steam generator, aas from several straight iiohrstucken was produced, which were bent in a serpentine shape and then assembled so that the üchiangenrohrstück 1 has been connected to the serpentine pipe section 2 at point V3. So far - it was with automatically controlled RohrDiegeinmaschinen, which also have the leg lengths L (31, 32, 33, 34 etc.) controlled, not possible, the initial leg length after bending the coiled pipe section 1 with the Kest leg length R33 A33 of the following pipe coil section should be controlled in such a way that no Passing work was necessary and there was no waste of pipe pieces decency. According to the problem, the length X of the starting leg A33 should be so large that they together with the length L-X aes Hestschenkels R33 together in connected State (73) results in the length L of the leg 33. This can easily be done by hand.

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The bending machine according to FIG. 2, which is only partially shown, shows a split bending die 3 on which the pipe section 1 is attached with a clamping device 4. To bend the pipe 1, the bending die 3 was used to adjust the desired Vvert of the bending angle turned by machine. At the same time, the pipe 1, which is attached to the bending rail by the clamping device 6 is oefestigt, hydraulically through the piston jerk of the cylinder 7 pressed against the bending die 3 and pressed into the bending process by the piston pressure of the cylinder 8.

Carriage 9 carries out a stroke H on the indicated aschinenoett 10 for the transport of the pipe 1. When the carriage 9 retreats, the clamping device 11 is open, and during the pipe-transporting operation of the carriage 9, the clamping device 11 is connected to the pipe 1. To measure the length L of the legs 31 and S2, the car carried out the ube H1 and Ä.2 , taking into account the distance a from the bending die 3 to the measuring device 12, 13, 14 by taking the stroke H at .funkt A oegann. 12 is a gear designated like net, which rolls on a rack 13, and 14 is a G-eoer, aer the revolutions of the gear wheel as executed reciprocating movement of the carriage 9 reported back to the electronic controller, not shown here 12th The measuring sensor 15 reported to the electronic control during the stroke movements for the dimensioning of the leg lengths 31 and S2 that there was still a pipe.

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However, since the Jn-earpiece- * has been bent, the air flow sensor reports 15 to the electronic control, not shown, that only a residual limb R83 is present. Thereupon a special program is switched on by the electronic control. This special program exists according to the invention in that the measuring device 12, 13, 14, 15 the place where the The end of the rest of the leg RS3 is determined precisely and thereby either the length L-Σ of the rest of the leg or the length for a full stroke missing length X measures and this measurement for the next transport stroke H3 of the V / agens 9 with the pipe 2 fastened in the clamping device 11 is influenced by the Starting leg A33 (Fig. 3) clamped with the clamping device 4 so that it has length X. When the stroke H3 is influenced by the measurement result, both and Corrections are automatically added, whereby the type of connection 73 is taken into account.

The clamping device 11 is coaxial with the clamped Pipe sections 1 or 2 controlled and rotatable by machine (not shown), so pipe coils can also be produced in this way be that not all pipe legs are in one plane. You can use a controlled turning table (not shown) relieve the clamping device 11.

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Claims (1)

SHEET I dch / j? r A "£" Ä T, T AKo ϊ λ Ü 2 ES Ι «Automatically controlled drilling cold machine for bending from itohfsciuan ^ en from individual straight itoiirstucken, the ■ for. the -Messungaer .ixohrschenke hang a Haoe executor, . vague has-, the one with a üohreinscann- and one Kubmeßvorriehtung is provided, wooei after your -biegen aer itear pieces of the heats chenicel of one bent piece of pipe rr.it -den: Änfan ^ SoClieHfcel aes other rtohrstüekeü so_ veroun— aen should be that ceiae leilachenkellänge sans the ^ ewünscnte- Sollschenkeil length er ^ eoen, aaduroh marked , ^ a .. the evb-ueiävorriclrtung delosttätig ax length of the xtestccnenkels (Itoj) with ^ t and advice aiesem- lue ^ result the Control-aes stroke for aie measurement of the length of the starting arm (ASj;) influenced. -. ' 2 .. Eon.rkaltbiege :: iasG: ". Ine according to Ans _y rucn 1, which for example. ■ is controlled by a rrograaam- ■ exeKtron-is.ch 'punched on strips, aaaurch marked, aai aer _A ueJVorgang des> t.eötöO: .en-iCels v ^r ^ 3) and the ^ eei-ifxUjsung aes follow-' the "Ii" ansporxhuoes {h $) is preprogrammed on the punched tape, but is only carried out if the ichtung (ti?) detects a jiestschen key (λο3). 109837/0059 - ii - ■ ■ ". BAD ORIGINAL 5. Pipe cold bending machine according to claim 2, characterized in that that the end of the remaining leg (RS3) is scanned by a cam (15) which has an electrical switch actuated. 4. Pipe cold bending machine according to claim 2, characterized in that that the end of the remaining leg (RS3) through a light beam impinging on a light-sensitive cell is keyed. 5. Pipe cold bending machine according to claim 2, characterized in that that the end of the remaining leg (RS3) is sensed by an induction coil. . V 1098 37/0059 BATH ORIGINAL