DE2039344A1 - Tube bending machine - Google Patents

Description

PATENTANWXtTr

DR.-ING. BY KREISLER DR.-IN6. SCHDNWALD 203934 A DR.-ING. TH. MEYER DR. FUES DIPL-CHEM. ALEK VON KREISLER DIPL-CHEM. CAROLA KELLER DR.-ING. KLDPSCH

COLOGNE 1, DEICHMANNHAUS

Aug. 6, 1970 Sch-DB / ls

Perkins Engines Limited

35 Davies Street, London W.l ,, England

Tube bending machine

The invention relates to a pipe bending machine, in particular a machine with which it is possible to measure the distance between the bends, the bending plane and the Predetermine angles of curvature for a number of bends to be made on a single pipe.

According to the invention is an automatic pipe bending machine for multiple at a desired angle of curvature, Deformation of pipe lengths taking place in a certain plane with distance between the bends by a frame, first stops to determine the distance between the bends, second Stops for determining the bending plane, third stops

100008/0271

for determining the angle of curvature, a table movable on the frame, a first drive for movement of the table against the first stop, a second drive for rotating the one of the second Stop certain angle to be bent pipe, a third drive for adjusting the third stop, a bending head located on the frame, a fourth drive for actuating the bending head in which the third stop is arranged to stop the fourth drive, and by signaling means associated with each Drive cooperate to actuate or stop it.

Appropriately, the first stop has one or more adjustable stops that are in a line on the Frame are arranged. The second stop also consists of one or more adjustable stops on the Frame, wherein the first and the second stop can be formed by a template (template). Of the third stop advantageously consists of a movement of the table rotatable as a function of the displacement Drum that carries one or more stops on its circumferential surface, which act on the movement of a Act on part of the fourth drive.

The first drive can have a first hydraulic servomotor, which has a first mechanical drive causes the table to be moved to the first stop and to actuate the second drive via the first signal means. The second drive is expediently equipped with a coupling that connects the pipe or the pipe support detected, which is rotated by a second hydraulic servomotor, the second signal means actuates the fourth drive.

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The third drive consists partly of the first
hydraulic servomotor and partly from the first mechanical drive and additionally has a third mechanical drive which rotates the third stop in accordance with the displacement movement of the table and stops the fourth drive via third signal means. The third signal means can respond to limited slight movement of the drum.

The fourth drive has a third hydraulic servomotor and a fourth mechanical drive for rotating the bending head, which in turn has a clamping element is equipped that after rotation of the head or the pipe support and before the fourth drive the Bending head rotates actuated

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The invention is explained in more detail with reference to the examples shown in the drawing. Show it:

Fig. La to lh several schemes of the hydraulic circuits, which the sequence of the process steps of a show machine according to the invention,

Fig. 2 is a view of the first and second stop,

3a and 3b are views of the third stop,

4 shows the first and third drive members _y

Figures 5a and 5t> the second drive element,

6a to 6d the fourth drive element,

7 shows a cross section of the bending head and

Figure 8 is a cross-section of the pipe holding assembly.

Fig. 2 shows a side view of a pipe bending machine, which essentially consists of a frame or bed consists, on which a table 2 and a bending head 3 are installed-H benefits. On a slide 5 on the frame side several stop carriers 4 are arranged displaceably. Each stop support 4 has a ramp 6 and one first stop forming adjustable bolt 7 and a second adjustable bolt 8 on the outside the ramp 6, which represents the second stop. The distance between adjacent bolt heads 7 is determined the distance between the bends in the bent pipe.

Figures 3a and 3b are top plan views of the machine embodying the Extension of table 2 and details of the third

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The stop. This is designed as a drum 9, which is rotatably and axially movable to a limited extent. There are several on the drum periphery Annular grooves 10 for fastening stop supports 11. The latter have axially adjustable bolts 12 (Fig. 3b), which represent the third stop. To adjust the angle of curvature, the correct groove 10 must be selected and fine adjustment can be made by moving the bolt 12 in this or that direction.

Fig. 4 shows schematically the first drive member, the is operated by a hydraulic servomotor 13, the acts on a chain 14 guided via gears 15, 16. The gear 15 is non-rotatable with a larger gear 17 connected, which carries a chain 18 which drives two further gears 19, 20. The gear 20 is with a other gear 21 firmly connected via a chain is deflected, which also runs via a compensating gear that is connected to the table 2 at the other end of the frame connected is. Therefore, when actuating the servomotor 13, the table 2 moves along the frame 1,

The third drive member, which corresponds to the first drive member up to the gear 19, is also shown in FIG. emerged. It consists of one connected to the gear 19 Bevel gear drive 24 and a shaft 25 which limits the axially movable drum 9 rotates.

In Fig. 5a, the second drive member is included is formed from a piston 25 which is vertically displaceable in a frame 26 and against the stop bolt movable 1st. The frame 26 rotates a fixedly connected to a gear 28 / the pin 27. over the gear 28 (Pig. 5b) and a gear 30, which rotatably attached to the

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outer part 32 of a coupling 31 engages, the connection of the outer part 32 is used with a tubular support 33, a chain 29 is deflected. When the Frames 26, the clutch 31 is engaged, whereby the Pipe support 33 to a movement of the frame 26 proportional Piece is rotated.

The fourth drive member is shown in FIGS. 6a and 6b in side view and top view. Two hydraulic pistons 34 work in opposite directions opposite strands of two chain loops 35 and The two chain loops are perpendicular by two Brackets 37 connected against which the pistons act. The upper chain loop 35 is the main drive of the bending head 3 »while the lower chain loop 36 is idling in order to compensate for the forces acting on the pistons 34, caused by the fact that the pistons lie outside the plane of the upper chain loop 35. The chain loop has a rod 38 connected to one end of a boom 39 (Fig. 6c) of a trolley 40 is connected, which is located in the vicinity of the drum 9 side of the Frame 1 is worn. The trolley is provided with stop pieces 41 (Fig. 6d), one of which is the stop bolt Touch 12 and can move the drum 9 by an allowable small amount.

The bending head 3 (Fig. 7) is from the chain 35 via a Gear 42 driven, which is connected to a rotatable part 43 is firmly connected, on which a former 44 with a recess 45 for the pipe, a clamping element 46 with a corresponding recess 47 for * clamping the pipe against the former 44 and a clamping element actuating mechanism 48 are mounted, which consists essentially of a piston 49, a joint system 50 and a slide 51 for the clamping element. On an extension

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of the frame 1, a punch 52 is arranged, which presses against the side of the tube during the bending process, so the parts not to be deformed are kept straight. The specific drive (Fig. 6a, 6b) is from a hydraulic servomotor 5 ^ derived, which over a chain 55, a shaft 56 and a chain 57 acting on a shaft 58 and a cam 59 and lateral displacements of the stamp carrier 6O causes.

One operated by a pneumatic piston 62 (FIGS. 6a and 3a) light belt drive 6l returns the bending head 3 to its starting position.

Fig. 8 shows a section of an axially movable tensioning shaft 6 ^, which with a sleeve or surrounding them Pipe support 33 cooperates in such a way that a pipe 67 is received by its jaws 66. The opposite jaws 66 Ends of the pipe support are equipped with a mechanism 68 in the form of a hydraulic piston, which the Tensioning shaft moved axially relative to the pipe support 33. This piston is hydraulically operated so that it the clamping shaft with the pipe against the pressure of a spring acting in the opposite direction or releases it. The mechanism 68 is responsive to a solenoid operated oil control valve at.

The function of the machine according to the invention is explained below with reference to FIGS. La to Ig.

As soon as the hydraulic and pneumatic operating sources are connected to the machine and the pipe clamping jaws 66 are open, the operator puts through the jaws a pipe section into the machine when the table has moved against a stop 69 (FIG. 2) and presses a "jaw closed" button, whereupon a

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Solenoid Sl (Fig. La) and the piston 68 responds, which causes that the jaws 66 clamp the tube. Then, the operator pushes a start button to operate a solenoid S2 and the hydraulic servomotor 13 to cause the table 2 to move to the left in FIG. This movement is made possible by a downshift system 71 when a pawl 70 (FIG. 5a) slides over the ramp 6 (FIG. 2) without a limit switch LS3 being energized; However, when the pawl 70 under the action of a spring 72 after crossing the ramp 6 falls down, the system 71 releases the limit switch LS3 from which stops the solenoid S2 and the solenoid for environmental SJ W transport of the table 2 energized. As soon as the pawl 70 hits the stop 7 (FIG. 2), it can pivot due to a loose articulated connection 73 and actuate a limit switch LS4.

The signal coming from switch LS4 causes several functions at the same time:

A solenoid S8 is stopped while a solenoid S7 is actuated to act on a mandrel piston 84 (Fig. 2) so that that the rounded nose of a thorn 7 ^ is moved within the tube in the vicinity of the entry into the α former 44 and it is ensured that the tube is supported from the inside up to this former.

The signal from the limit switch LS4 engages the clutch 31 (FIG. 5b) by energizing a solenoid S5 (FIG. 1) and locks the gear wheel 30 to the pipe support 33. When the pressure in the clutch 31 has reached a suitable value, it is engaged Drude switch PS triggered, which causes a solenoid S6 to initiate the movement of the piston 25 downwards. A button 75 (Fig. 5a) is mechanically attached to the end of the frame 26 to be perpendicular

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to move pivotable plate 76 with a finger 77, which triggers a limit switch LS6 when the button is against hits the stop pin 8. When the frame 26 is lowered to its stop 8, the chain 27 rotates the tubular support 33 and sets the desired bending plane.

The signal from the limit switch LS4 also excites you Solenoid S9 (Fig. If) or SlO, so that the servomotor 62 returns the former 44 to its initial bending position. This position is set by actuating the limit switch LS7 or LS8 determined.

The combination of the signals from the limit switches LS6 and LS7 or LS8 has the consequence that by energizing a solenoid SI9 (Fig. Ig) the former 44 of a piston is charged with a puff of lubricant. In addition, the signal combination excites a solenoid SI8 (Fig. 1h), the piston 54 (Fig. 6a) for pressurizing the Plunger 52 (Fig. 7) causes a solenoid S12 to stop and actuates a solenoid SIl, so that the piston 49 (Fig. 7) the clamping element 46 adjusted.

The movement of the tensioning element 46 triggers a limit switch LS9, which can be seen schematically in FIG is.

The signal from this limit switch LS9 has at the same time the following effects:

The solenoid 319 (Fig. Ig) is stopped to refill the lubricant distributor 90, while the solenoid (Fig. If) is de-energized so that the former piston 62 can follow the former 44 without breaking the drive (Fig. 6a). The solenoid S5 (Fig. Ie) is switched off to release the clutch JJl and the solenoid S6 is

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stopped so that the plane of the flexible shaft 25 pulls the frame 26 upwards, so that a nose 78 is a limit switch LS5 actuated.

The signal from the limit switch LS5 de-energizes the solenoid 32, causing the servomotor 13 for the table in a reaches neutral position in which it follows the table 2 when it is pulled away from the bending tube. The limit switch LS5 also sends a signal to a solenoid S15 or Sl6, on the basis of which the piston 34 perform a stroke.

When the chain 35 rotates the bending head, the pipe is bent around the former 44 and pulls the table 2 over the frame 1, while the trolley 40 connected to the chain 35 moves along the side of the frame until the stop 41 against the stop bolt 12 (Fig. 3b) comes to rest and moves the drum in Fig. Jb to the left so that a limit switch LS12 or LS14 is triggered.

The signal from the limit switch LS12 causes the solenoid S15 to close the pistons 34 in a neutral position bring, causes the solenoid Sl8 or S17 (Fig. Lh) to release the plunger by the piston 62 (Fig. 3ί is withdrawn, causes the solenoids 37 and S8 (Fig. Id) retract the mandrel 74 by returning the piston 84 (Fig. 2) and causes the solenoids SIl and S12 (Fig. 1h) to open the clamping elements 46 by pulling the piston 49 back, whereby in the final phase this movement triggers a limit switch LS10.

At this stage the pipe is still wrapped around the former, but it is free of all tensile forces.

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The signal from the limit switch LS10 excites the solenoid Sl6, whereupon the pistons 34 are switched to return the bending head (not the former 44). The trolley 40 moves backwards and possibly triggers (FIG. 6d) a limit switch LS13 or LSIl, by means of which the bending head is set for the next bending process. That of this limit switch LSI? outgoing signal brings the piston Jk into their neutral position and energizes the solenoid S3 to move the table forward over the next ramp 6, whereupon the process described is repeated.

After the table has passed the last stop 7, it moves forward to an end stop 8l, the triggers a limit switch LSI on table 2. That The signal from this switch actuates the solenoid Sl to open the clamping element and enable it to be removed of the bent pipe. It also excites a soteioid S4 (Fig. Ic), which withdraws a piston 82 (Fig. 5a) and causes the return of the pawl 70. This causes an arm 83 the switching of the limit switch LS3. That The signal from the switch LS3 has the consequence, via the solenoid S2, that the servomotor I3 (FIG. 4) is in its starting position going back. As soon as it has reached this position, the end stop 69 actuates one carried by the table 2 Limit switch LS2, which stops the solenoid Sl and brings the servomotor 13 into its neutral position. Of the Limit switch LS2 also de-energizes solenoid S4 so that the piston 32 extends and the pawl 70 can drop into its operating position.

The bending direction and the movement of the trolley 40 are controlled by a manual switch 85 (Fig. If). Of course, the solenoids S9 and SI3 are operated, while the solenoids SlO and Sl4 stopped

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are when the switch 85 has taken the position shown. Therefore the bend is only one direction. The starting position of the trolley 40 is controlled by the limit switch LSI3 and the bending end by the limit switch LS12 controlled and switches 86, 87 are provided in a suitable manner, which the limit switches LS12 and LSI3 energize. If the bend is to be in the opposite direction, the solenoids will SlO and Sl4 operated by operating the switch 85, while the limit switches LSIl and LS14 to determine the end stations of the trolley 40 and for switching the switches 86, 87 are used. However, this can be optional when setting up the machine. To trigger the limit switch LS12 or LS14, the possible stop piece 4l (Fig. 6d) effective.

An advantage of the invention is that in one or more long production processes with one or more Designs of the bent tube the adjustable stops 7 »8, the ramps 6 and the end stops 69, 8l are interchangeable with machine templates, which are simply and quickly screwed to one side of the frame can be. The drum 9 is also arranged so that it can be easily and quickly replaced with another drum that goes with another template.

The pipe holder and all parts coaxial with it can be displaced transversely to the table 2, thereby adapting to different pipe sizes results in such a way that these can be mounted on the bending head to the different sizes Shaper can be aligned. The arrangement is made so that the gear chain 29 (Fig. 5b) to two movable guide rollers 87 and 88 and a fixed roller 89 and the gear 28 is deflected so that the Pipe support 33 within certain limits according to FIG. 5b can be moved left or right.

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Claims (1)

Expectations ί1. ! Automatic pipe bending machine for single or multiple at a desired angle of curvature, in a certain plane, with spacing between the Bends, deformation of pipe lengths, g e k β η η ζ e i c h η e t through a frame (1), first stops (7) to determine the distance between the bends, second stops (8) to determine the bending plane, third stops (9) for determining the angle of curvature, one on the frame (1) movable table (2), a first drive (13) for moving the table against the first stop (7), a second drive (25) for rotating the a tube to be bent at an angle determined by the second stop (8), a third drive for adjustment of the third stop (9) * a bending head (3) located on the frame (1)> a fourth drive (34) for actuating the bending head (3), in which the third stop (9) is arranged «that he stops the fourth drive (34), and by signaling means, which interact with each drive to activate or stop it. 2, machine according to claim 1, characterized in, that the first stop (7) has one or more adjustable stops, which are arranged in a line on the frame (l) are. , ... "'■ 3. Machine according to claim 1 or 2, characterized in that the second stop (8) has one or more adjustable stops on the frame (L). - 14 109808/0771 4. Machine according to claim 1, characterized in that the first and the second Stop (7 # 8) are formed by a template. 5. Machine according to claims 1 to 4, characterized in that the third stop (9) consists of a drum rotatable as a function of the displacement movement of the table (2), which carries on its peripheral surface one or more stops (12) which act on the movement of part of the act fourth drive (34). 6. Machine / i according to the preceding claims 1 to 5 » characterized in that the first drive (13) has a first hydraulic servomotor has, which causes a first mechanical drive (14 to 23), the table (2) to the first Stop (7) to move and the first signal means (LS4) to operate the second drive (25). 7. Machine according to claims 1 to 6, characterized in that the second drive (25) is equipped with a coupling (31) which engages the pipe or the pipe support, and that a second Hydraulic servomotor (25) is provided, which rotates the pipe or the pipe support and via second signal means (L35) actuates the fourth drive (34). 8. Machine according to claims 1 to 7, characterized in that the third drive partly from the first hydraulic servomotor (13) and partly from the first mechanical drive (14 to 23) and additionally has a third mechanical drive (24, 25) which the third stop (9) in accordance with the 109808/0271 " ¹⁵ " The sliding movement of the table (2) rotates and the fourth drive (3 ¹ O) stops via third signal means (LS12, LS14). 9. Machine according to claims 1 to 8, d a d u r c h characterized in that the third signal medium (LS12, LS14) respond to a limited slight movement of the drum (9). 10. Machine according to claims 1 to 9 »thereby characterized in that the fourth drive (3 * 0 a third hydraulic servomotor and a fourth mechanical drive (35 to 45) for rotation of the bending head (3). 11. Machine according to claims 1 to 10; through this geken uze.wages that the bending head (3) a clamping element (46) which after rotation of the tube or the tube support and before the fourth drive the bending head rotates is actuated. 109808 / n? 71