DE1243952B - Device for the production of shaped bent parts - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. Cl .:

B21d

German class: 49 h-12

Number: 1243 952

File number: H 30435 I b / 49 h

Filing date: June 21, 1957

Open date: 6th Wed 1967

The invention relates to an apparatus for producing shaped bent parts, ζ. Β. Frame, especially spring core frame for upholstery, made of edgewise bent steel strip.

The device provided for this according to the main patent 1119 631 consists of a device for bending Bending device of any length, both inwardly and outwardly curved frame sides, a length measuring device arranged in front of the bending device and designed as a backstop device with a measuring roller and a pair of scissors arranged between the measuring device and the bending device Cutting off the steel strip. This device according to the main patent is to be operated by hand Device formed.

The invention aims to improve the device according to the main patent by a enables fully automatic bending of frames with the highest possible accuracy and speed shall be.

For this purpose, the invention provides a motor-driven feed device and a Program control device that drives the feed device, the bending device and the Scissors actuated, the program control device with the length measuring device as the triggering device Organ is coupled.

A motor-driven feed device and a program control device are required for fully automatic bending, which actuates the drives of the feed device, the bending device and the scissors, is absolutely necessary. The invention accordingly constitutes what the main claim contains as a whole in its characteristic. It is crucial that by coupling the program control device with the length measuring device as the triggering organ, a dependency of the program control on the real length of the advanced strip steel.

With this coupling it is achieved and ensured in the fully automatic workflow that all work processes are controlled in precise dependence on the steel strip lengths actually fed to the bending device, so that the finished frames match the desired shape with high accuracy and, above all, the feed device with a few rollers with high Speed can work without any slip of the feed rollers could affect the accuracy. The latter would be the case, for example, if - which in itself would also be possible - the feed device as a triggering device for producing
Form bending parts

Addendum to the patent: 1119 631

Applicant:

Fritz zur Heide, Rahden (Westphalia), Bahnhofstr. 5

Named as inventor:

Fritz zur Heide, Rahden (Westphalia)

Organ would have chosen. The length measuring device for the really advanced steel strip length, as they according to arrangement and training in main patent 1119 631 in the context specified there Is placed under protection, is therefore a prerequisite for an accurate, fully automatic bending according to the present Invention, which thus represents an embodiment.

It is advantageous in connection with the subject matter of the main claim, as a particularly light one convertible and precisely working program control device one with the movement of the length measuring device Coupled control roller with the feed lengths arranged in different cross-sectional planes corresponding recesses, a program control plate arranged along the control drum with switch pins in longitudinal and transverse rows and along with a slide that can be moved gradually along the control drum via the program control plate a feeler pin that scans the recesses of the control roller and with the switching pins of the program control plate to provide actuatable switches associated with the longitudinal rows of the switch pins. Included With the bending device, a second program control device of essentially the same design can be used be coupled. However, this second control device on the bending device can also be designed in such a way that "it only has as many controls as there are different sizes Bending angles are to be bent. In this case, the program control device can consist of a control roller with cam disks arranged so that they can be rotated and locked on the shaft of the bending device and each a fixedly arranged switch designed as a toggle switch which is assigned to each cam. In this latter case, however, only many

709 609/221

3 4

angular frames with the same bending radii, but tapped. The program control plate 19 is through a

automatically bend large bending angles. hydraulic cylinder 48 across the measuring disc

The invention can be disengaged in the description wave 6 below. The switches 12 of the carriage 14

Exercise in conjunction with the drawings showing two rollers 17 mounted on levers for actuation

Represent exemplary embodiments, explained; it shows 5. The program control plate 19 is in the "cross direction

Fig. 1 is a side view of a first Ausfüh- to the measuring disk shaft 6 with one of the number of

approximately example of a device according to the invention, switch 12 and in the longitudinal direction to the measuring disc

Fig. 2 is a plan view of the device after wave with one of the number of spaces between

F i g. 1, see the control disks of the control roller 8 corresponding

Fig. 3 is a side view in the direction of the arrow α provided after io corresponding number of holes in which the

Fig. 1, switch 12 actuating pins 18 depending on the pro-

Fig. 4 with the device of Fig. 1 to 3 grams can be optionally inserted. On the slide 14

frame shape to be bent, a rope 20 is attached, which is

Fig. 5 is a circuit diagram of the device to the side of the machine mounted roller21 is performed and

F i g. 1 to 3, 15 carries a weight 22 at its lower end (FIG. 3).

F i g. 6 is a side view of a second, combined, by the weight 22, the carriage 14 is attached to the

multiple execution form of a device after the control rollers 8 moved along.

Invention, the bending device C assigns two under the

F i g. 7 shows a section along line VII-VII in FIG. 6, bending steel strip 3 arranged and two vertical

8 shows a side view of the control disk for the 20 support rollers 23 arranged right above it, as well as a

in Fig. 6 and 7 shown device, attached to a lever 24, freely rotatably arranged

F i g. 9 one on the in F i g. 6 to 8 shown nete bending roller 25. The bending lever 24 is firmly on

Device to be bent frame shape, a shaft 26 is arranged. With the bending device

FIG. 10 is a circuit diagram for the tang C in FIGS. 6 to 8 and its shaft 26 is one in structure and

shown device, 25 training essentially the one already for the measuring

Fi g. 11 is a circuit diagram of a branch circuit, device A described program control device

by the program control device 7 'corresponding to one tang 7 when the program end is reached

individual devices are switched so that one coupled whose control device 7 corresponds

closed cycle of the program and a concomitant individual parts each with 8 ', 9', 12 ', 12 ^ 4 to 12 F,

timely work is made possible. 30 13 'to 22' and 48 'are designated. The shaft 26 is

The in F i g. 1 to 3 shown machine has a pole-changing geared brake motor

a base 1 on which a length measuring device 27 is driven via a pair of spur gears 28 and 29,

tang A, a feed device B and a bending The shaft 26 is designed as a hollow shaft and is

Device C are arranged. Between the front of a plunger 30 engaging the bending lever 24

thrust device B and the bending device C is penetrated by a hydraulic cylinder 35

the scissors D provided. Is operated on the front side of 31, so that the bending lever 24 with the

The stapler E is attached to the machine. Bending roller 25 can be moved backwards so far

The length measuring device consists of a measuring that the bending roller when pivoting the bending disc 2, which rotate freely on the hoist 24 to be bent and pass the material to be bent Steel strip 3 rolls off. Opposite the MeB-40 goes.

disc 2, a pressure roller 4 is arranged, the between the length measuring device A and the steel band to be bent 3 against the measuring disc 2 bending device C , the motorized feed presses and arranged by a hydraulic cylinder 5 device B , which are withdrawn from two steel band 3 to be bent opposite lying, other material to be bent can attack. With the length measuring device Λ there is a pro 45 pairs of rollers 32. The pairs of rollers 32 are the gram control device 7 as the releasing element, coupled by a two-stage geared brake motor 33. This control device initially consists of the interposition of a two-stage gearbox of a control drum 8, which is driven from a plurality of 34 to 40. From the shaft 37 of the switch of the measuring disk shaft 6 arranged side by side, the support of a space between 50 rollers 23 of the bending device C, which are left free, are driven via a spur gear train 42.
Control discs is formed. Between the feed device B and the

The control disks are twisted on the shaft 6- bending device C , the scissors D is arranged, the

arranged bar and lockable. Is designed on its circumference as a circular knife scissors, the for

each of the control disks has a recess 9, knife 43 pointing towards the feed device

the purpose of which will be described in more detail later ". 55 is, while the one pointing to the bending device C.

At the end opposite the measuring disk 2, knife 44 is provided by a hydraulic cylinder 45

a lever 10 is arranged on the shaft 6 and can be pivoted via a lever linkage. The party-

its free end carries a weight 11 whose standing knife 43 points backwards so that the

Purpose will also be described later. bending steel strip 3 in the recess of the measuring

Furthermore, the control device 7 consists of 60 sers, after it is cut through, is held,
a slide 14 which can be moved on round guides 13 parallel to the measuring In the base 1 is a hydraulic cylinder 46 on the disk shaft 6, which is arranged in several order, which carries both slides via a lever system 47 rere switches 12, 121 to 12 volts. The carriage 14, 14 'has moved back from its end position into the zero position along the control roller 8 via a program. During the backward movement, the tactile control plate 19 must be displaceable and has an arm 16 that crosses the B5 pins 15, 15 'from the spaces between the switches 12, on which control discs of the control rollers 8, 8' a tracer pin 15 is attached, which is pulled into the spaces will. Likewise, the rollers 17, 17 'of the switches 12, 12', a switch between the control disks of the control roller 8, must free themselves during the backward movement

5 6

between the switch pins 18, 18 'of the program, that the feeler pins outside the spaces control plates 19,19 'can move past. To die and the actuating rollers 17,17 'of the switch between The purpose is to see the already mentioned hydraulic switch pins 18,18 'in the program cylinder 48, 48 'provided, which the program control control plate 19 lie. Upon termination of the release plates 19, 19 'and the feeler pins 15, 15' in the forward movement caused by the cylinders 48, 48 '

withdraw written position. is operated, a switch 81 is operated, which the hydraulic

On the basis of the in FIG. 4, switches on in cylinder 46, so that now both of the individual switching points are drawn in, let slides 14, 14 'be moved back to their starting position.
tion of the machine: io When this position is reached, a switch 82

The starting point 50 is actuated on a straight line that selects the cylinders 48, 48 'in reverse and coincides with the cutting edge in the machine and the feeler pins 15, 15' and the program on the scissors D coincide. By actuating a control plate 19, 19 'back into its working position, push button switch 80 (FIG. 5), the feed is moved. When the working position is reached, the touch motor 33 is set in motion, with the feed device 15, 15 ', a switch 83 is actuated, which actuates the hydraulic cylinder 5 to be bent to point 51, which advances the lift. At this point is on the first control pressure roller 4 under the measuring disk 2 results. Disk of the arranged on the measuring disk shaft 6 Now pulls the weight U, which reaches a recess 9 at the end of the control roller 8, adjustable by the lever 10 on the measuring disk shaft 6 on the stylus 15 through the cable 20, 21, 22 of the 20, which is arranged Control roller 8 of the control device 7 carriage 14 is pulled through until it rests on the and the measuring disc 2 again in their zero position, next control disc. When passing Upon reaching the zero position, the weight actuated by the recess 9 is formed by a in Figure 11 a switch 84, the 18 turns on the print cylinder 45 to the gap D actuate program control plate 19 arranged Sehaltstift and simultaneously actuates the switch 121 which feed the off 25 cylinder 5 actuated in reverse, so that the pressure switch, roll 4 comes to rest again. As soon as that too

At the same time the bending material is cut off in the adjacent hole, a switch program control plate 19, a switch pin 18 is actuated, which causes the scissors D to move back, which switches on the bending motor 27 and activates the feed motor 33 again pivoting the bending lever 24 in the direction of the clockwise 30 sets. At the same time, however, the cylinder 46 is also effected, with the steel strip operating around the lower support roller, which bends the lever system 47 back into the Aus-23. The desired angular movement, starting position moved back. The above-described bending lever 24 is to be carried out, can be repeated on the bene process, that is, the first control disk and the next frame on the flexible shaft 26 can be bent,
ordered control roller 8 'set. As soon as the 35 The in F i g. The machine shown in FIGS. 6 to 8 represents a recess 9 '. When this setting is reached, the simplified embodiment of the probe pin 15' of the machine shown associated with the bending device C in FIGS. 1 to 3 moves. With this machine, control device 7 'moves through the recess, only those frames are bent, the corners of which are bent into the corresponding first hole of the program around a two-part bending roller 63 and control plate 19 'inserted switching pin 18' the 40 whose corners are connected by straight lines actuates switch 12 C of the carriage 14 ', who are. The measuring device A is switched off in the same bending motor 27. At the same time it is coupled by way of a control device and a plugged into the adjacent hole works with this as well as this already th switching pin 18 'of the switch 12 E switched on, which is for FIG. 1 to 3 for the control device described the counterclockwise rotation of the motor 27 turns on; so that 45 was. Only the control disks of the control roller 8 of the bending levers 24 now closed in the counterclockwise direction are in this respect moved backwards compared to the one already described. As soon as the desired angular position of the control device 7 is designed differently than that of the bending lever 24, the feeler pin 15 'recesses 9 do not jump at right angles to the circumference that penetrates through a recess 9' of the second control cam, but rather on the thrust washer 8 'of the control roller and This switches the 50 side of the stylus 15 an acute angle to the switch 12 C, which switches off the bending motor 27. Have surface 66 forming the control disk plane. At the same time, the switch 12 A is actuated, which is extended by an extension 64 and switches on the rapid traverse of the feed motor 33. Intermediate space between the discs engages. Here-

From point 52 to point 62 repeat at is the mode of action that when starting the

Processes in the manner already described under 55 stylus 15 on the shoulder 64 the inclined surface 66

corresponding actuation of the switches 121 to 12IV acts as a control cam and the carriage 14 parallel

and 12A to 12F. to the measuring disk shaft6 in the next intermediate

When the point 50 is reached, everyone stands behind it. This arrangement allows

lying disks of the control rollers 8, 8 'with their cable pull 20, 22 come to an end. At the end of

Recesses 9.9 'in alignment so that the feeler pins 60 program is an adjustable control cam in front of

15,15 'of both control devices 7 and T seen freely, the stylus 15 from the space

to the end of the Prograrnmsteuerplattenl9,19 'related, where he in its idle position by

because, at the end of the program control plate 19, a locking element, for. B. a leaf spring 67 held

the control device 7 a pin 18 is provided. A tension element, e.g. B. a cable with weight,

which operates the switch 12V (Fig. 11). As a result, 65 causes the carriage 14 to return, the

the return cylinders 48, 48 'are actuated and switch 65 over, without causing a switch

because of the stylus 15, 15 'and the program control which are arranged in the program control plate 19

plates 19,19 'of both control devices 7 and 7' so switch pins 18 run away. When reaching the exit

Claims (1)

7 8 The initial position of the carriage 14 causes a stop. When the bending device moves backwards , the locking element 67 is released at 68. When it reaches its initial position, a switch 101 and tension spring 69 return the stylus 15 to its working position, which stops the bending motor and at the same time returns it to its position. the feed motor 70 switches on again. Now The feed device B works in principle 5, the steel strip 3 is straight through the device analogous to that already described for FIGS. 1 to 3. In contrast to this, however, a single-stage geared carriage 14 is provided in the next gap , which directly advances the feed motor 70. The switch 651 drives the feed roller pairs 32. Behind the scissors D ₁ that switches off. Simultaneously, the switch is formed 65III including this case, as the sheet scissors, a xo is actuated, the intended passage of the current to the scarf-guide 71 for the steel strip 3, releases the DIE ter 76 B. sen under a support roller 72, which it with a groove The switch 76 B , the control disk 74 overlaps laterally, passes through and arranged the bending roller, which feeds for the angle from point 93 to point 63. . 94 is set. The process is repeated for the The structure of the bending device C works for a fairly straight line from point 94 to point 95 as well as for borrowed the one described in the main patent, so that a radius from point 95 to point 96 and the detailed description is unnecessary. The rade from point 96 to point 97, although the Flexible shaft 26 of the bending device C carries on its switch 65IV and the switch 76 C is switched to the rear extended end which the bending roller 63 den, namely the latter through the third control Coupling 73 and disk 74 compressing during bending. one of the number of the section to be bent, of different lengths for bending the last radius from point 97 to arc lengths corresponding number of Steuerschei- point 98, the switch back 651 and 65II soben 74, which are provided with cams 75, the switch as the switch 76 A actuated, as the bending radius 76, 76 ^ 4 to 76 C actuate. The control discs 74 includes a right angle, as Toggle zusind against rotation and fixable on the shaft 26 in the top 25 bent radius from point 91 to point 92 the ordered so that the cams 75 which was according to the case. For the straight line from point 98 to the bending angle, the two straight lines form a corner to the starting point 90, the process is the same, including each other. The as already described above for the other straight stretching drive of the bending device C is carried out by a ken. When the program end point 90 is reached, the pin 15 is switched from counter-rotation by actuating the switch 76 in, as already described above, so that the strip steel moves out and constricts the gap between the panes 3 overlapping bending pins 77 in locks and the carriage 14 is moved back to its starting position in its starting position, one being withdrawn, with the bending motor being switched off when the output limit switch is reached. 35 position of the stylus 15 is unlocked and again in When the return triggers the clutch 73, so that its working position returns. At the same time, the bending rollers 63 release the steel strip to be bent. takes place on reaching the starting position of the slide The control of the machine is such that before at least 14 a switch (not shown) the hydraulic Begirtn the bending process the feed roller pairs Lischen cylinder 5, which the pressure roller 4 from the tape 32 is released by a hydraulic cylinder 78 40 steel 3 lifts and the measuring disc 2 is relieved, and the so that the steel strip 3 migrate with the bending at the same time the hydraulic cylinder for actuation can. the scissors D. The released measuring disc 2 allows With reference to FIGS. 9 and 10, we shall now show the lever weight 11, the control roller 8, and the bending machine according to FIG. 6 to 8 and the measuring disk 2 can be assigned to its zero position again: 45 to move back, with when the zero position is reached In the frame shown in FIG. 9, a switch (not shown) is to be actuated 90 which indicates the starting point, i.e. the starting point. h, the cut edge turns on again at the circuit described.
Scissors mean. By pressing a push button switch 100 , the feed motor 70 is started.
set. Due to the leading steel strip 3, 50 the measuring disk 2 and thus the control roller 8 are turned. The first disc of the control roller 8 is set with its parts, e.g. frame, in particular innerspring recess 9 at such an angle to the stylus frame for upholstery, from edgewise bent 15 that the arc length of the angle on steel strip, with a length of any length for bending, The measuring disc 2 corresponds to the length of the straight section 90 55 both inwardly and outwardly curved to 91. Upon reaching point 91, the frame side is set up bending device, the carriage 14 moves into the next space in front of the bending device and switches the switch 651 once for length measuring device with measuring roller and one the feed motor and on the other hand the switch between measuring device and bending device ter 65 Π for the bending motor for bending and equally arranged scissors for cutting the strip at the same time the cylinder78 for lifting the feed ■ steel, according to patent 1119 631, marking rollers 32 a. The control disk 74 , which is set for the 90 ° angle with its cam by a motor-driven countersink 75, now rotates the feed device (B) and a program control device until the cam switches the switch device assigned to it (7), which drives the feed -76.4 is actuated and thus reverses the bending motor and 65 device, the bending device (C) and simultaneously actuates the cylinder 78 in reverse and actuates scissors (D) , the program control bringing the feed rollers 32 to rest again. device with the length measuring device (A) as the point 92 in FIG. 9 reached. triggering organ is coupled.