DE1095240B - Boerdel machine - Google Patents

Description

GERMAN

The invention relates to a power-driven flanging machine for bending sheet metal edges in various shapes and for the production of external and internal flanges on pipe ends. Of the Flaring hammer has the shape of a partial circular ring or a circular disk, which is in a corresponding circular guide is rotatably mounted. To drive the flanging hammer is a up and down movable plunger provided. In order to simplify the structure of the crimping machine, according to the invention the drive plunger is designed at the same time as a feed device for the flanging hammer. One advantageous embodiment of the inventive concept is characterized in that the plunger has one on it rotatable worm, which by engaging in a worm gear toothing of the flanging hammer transfers the axial ram movement to the hammer and the rotation of the hammer feeds the hammer causes.

To the prior art it should be mentioned that it was already known, a driven screw in a Let the worm gear teeth of the flanging hammer engage, but for the drive of the flanging hammer no up and down movable plunger is provided, rather the rotary movement of the flanging hammer derived directly from the rotation of the screw. That has the disadvantage that after Each time the workpiece is bent, the flanging hammer is moved back again by turning the worm backwards must become. This way of working takes a lot of time, more so than every time after a flanging hammer movement, the workpiece must be re-clamped.

In order to also effect the delivery automatically, according to a further feature of the invention, the Worm sleeve designed as a pinion, in which a gear driven by the machine drive intervenes. Another advantageous embodiment of the flanging machine, which in a known manner with a controlled hold-down device is provided for the workpiece, according to the invention is that the hold-down lever pivotably mounted in the machine frame is coupled directly to the ram. In order to be able to easily adapt the hold-down device to different thicknesses of the workpiece to be machined, the hold-down lever is mounted on a rotatable and lockable eccentric.

In the drawing, an embodiment of the flanging machine is in a vertical section and partially shown in view, the representation being simplified compared to the structural design was drawn.

In the machine frame 1, the drive shaft 2 is rotatably mounted at the bottom, on the free end of both

Applicant:
Trumpf & Co., Stuttgart-Weil in the village

Werner Hähnel, Stuttgart-Weil in the village,
has been named as the inventor

for example, a V-belt pulley can be attached. In the machine frame or in an inserted one Guide sleeve 3, the drive tappet 4 is movably guided up and down. The drive of the ram

ao takes place, for example, by means of a connecting rod 5 which is articulated to the plunger 4 by a bolt 6 and which, on the other hand, is mounted on the eccentric disk 7 of the shaft 2. The plunger 4 sets continues upwards into a cylindrical rod 4 ', and

he sleeve 8 is rotatably mounted on this rod, which in the example shown is divided into three pieces by two ring grooves. The lower one in the sleeve 3 guided sleeve piece 8 is designed as a pinion 9. The sleeve piece above is as Screw 10 is formed, while the upper sleeve piece 11 is in turn guided in the sleeve 3. In axial direction is the sleeve 8, 10, 11 by a screw bolt 12 with the push rod 4 ' connected that the sleeve only rotate, but not move in the axial direction on the plunger 4, 4 ' can. In a further bore of the sleeve part 11, a pin 13 engages loosely, which through his The collar 13 'and a union nut 14 are connected to the sleeve part 11 in the axial direction. Of the Pin 13 is formed at the top to form a fork 13 ″ into which the likewise forked end 15 ′ of a hold-down lever 15 intervenes. The fork 13 ″ carries a sliding block 17 rotatably on a bolt 16, which is shown in FIG the forked end 15 'of the lever 15 engages. This engagement causes the pin 13 to rotate prevented.

The hold-down lever 15 is pivotably mounted on an eccentric pin 18, which in turn is in am Machine frame 1 provided bearing eyes 19 is rotatably and lockably mounted. The eccentric bolt 18 is provided on the outside with a handle or a handwheel, not shown in the drawing. Of the Hold-down lever 15 is designed in two parts, d. i.e., its lower end 20 is interchangeable with the part

009 679/96

15 connected. Depending on the shape of the sheet metal edge to be produced, differently shaped feet 20 are also included the lever 15 connected. The foot 20 can also be designed as a spring member, whereby a certain Advance in pressing is achieved.

A circular ring-like guide 21 is fixedly connected to the machine frame 1 and is shown in FIG its middle part is shown broken off. Tn this guide 21 provided with annular grooves is the flanging hammer 22 rotatably mounted. The flanging hammer is designed and extends as a circular ring or circular disk for example over a central angle of slightly more than 180 °. The one with the workpiece Cooperating plate 24 of flanging hammer 22 can be interchangeably connected to part 22. Finally, the table 25 intended to support the workpiece 23 is also of the machine frame 1 firmly connected.

With the drive shaft 2 running, the ram 4, 4 'and with it the worm 10 are moved up and down. Due to the permanent engagement of the worm 10 in a worm gear toothing on the outer circumference of the flanging hammer 22, the flanging hammer is rotated back and forth, wherein in a known manner the free end of the workpiece 23 'blows are carried out. Simultaneously with the working stroke of the ram the hold-down lever 15 is pivoted so that its foot 20 places the workpiece 23 on the work table 25 stuck. During the idle stroke of the ram, the hold-down device moves upwards, so that the workpiece can be moved by hand on the table. In the drawing the different ones are dashed Positions of the beaded workpiece end 23 'are shown. The flanging can be done up to 180 °.

The respectively required infeed of the flanging hammer 22 takes place by rotating the screw 10 on the plunger 4, 4 ', which is done by hand, for example by rotating the pinion 9 engaging Gear 26 can be done. This delivery can take place at any time during the exchange process. the Axis 27 of gear 26 could be connected to a handwheel.

The delivery can also take place automatically, especially if it is desired, the return of the flanging hammer 22 to get into its initial position faster than the actual feed movement. The axis 27 of the gear 26 is, for. B. mounted on a swing arm 28, the different with each other engaged, not shown in the drawing gears. These gear sets are separated from that on the drive shaft by a vertical worm shaft, not shown in the drawing 2 arranged screw 29 driven off. A hand or foot pedal switch can be provided be to drive the drawn gear 26 slowly during delivery, while it is in another Switching position is driven quickly and in the reverse direction of rotation. The flanging hammer 22 becomes like this accelerated back to its roughly horizontal starting position.

The worm toothing in the worm 10 and in the flanging hammer 22 is preferably self-locking educated. If desired, the screw 10 can rotate freely on the push rod 4 'a little more difficult, then a brake spring could be provided between the corresponding parts be. There could also be a ball catch in the lower end face of the sleeve piece 8, for example are located with notches in the face

ίο of the plunger 4 cooperates. By rotating the Eccentric bolt 18, the distance between the hold-down foot 20 and the work table 25 is adjustable, in order to be able to clamp sheets of different thicknesses. The eccentric bolt 18 is in the axial direction can be pulled out of the bearing eyes 19 so that the hold-down device can be removed when on the workpiece the last flanging is to be brought about to 180 °. In the flanging hammer guide 21 can be a adjustable stop may be provided to thereby

ao to determine the desired flanging angle of the workpiece edge in each case.

If the invention has been described with reference to a stationary machine, that includes its application in the case of a portable machine, a power tool for flanging or the like.

Claims (5)

Patent claims: 1. Flanging machine for sheet metal and pipes with a ram that can be moved up and down driven flanging hammer in the form of a partial circular ring, characterized in that the ram (4, 4 ') carries a screw (10) rotatable on it, which by engaging in a Worm gear teeth of the flanging hammer (22) transmits the axial ram movement to the hammer and which, when rotated, causes the hammer to advance. 2. crimping machine according to claim 1, characterized in that the screw sleeve (8,10) as Toothed pinion (9) is formed, in which a manually or machine driven Gear (26) engages. 3. Flanging machine according to claim 1 with a controlled hold-down device for the workpiece, thereby characterized in that the hold-down lever (15) pivoted in the machine frame is coupled directly to the plunger. 4. crimping machine according to claim 3, characterized in that the hold-down lever (15) a rotatable and lockable eccentric (18) is mounted. 5. flanging machine according to claim 3, characterized in that the foot (20) of the hold-down device is designed as a spring member. Considered publications:
Swiss Patent No. 216 009;
U.S. Patent No. 1,571,558. 1 sheet of drawings