DE1427132C - Device for cutting through thin metal strips with flanged or bent long edges - Google Patents

Description

3 4

The punch knife? has a tip 8, which is punched into the metal strip 10 during the punching or lips zen penetrates into the metal strip, during which can be without special centering organs

Longitudinal edges from the saw blades 5.6 through- for the metal strips are required. Both sides of the

are separated. Separating tool 4, a projection 18 is provided,

On the frame of the device is a slot-shaped 5 with blocks 14 and 15 guided in guides ger space or a recess 9 is provided by cooperating. In the blocks 14, 15 are

through which a transversely curved, with um- cylinder 16 for actuating the with a piston

curved longitudinal edges of provided metal strips provided punching punch 13. In cavities of the

10 (FIG. 3), from which a piece is cut off, blocks 14, 15 are also provided with springs 17, which

should be introduced. The recess 9 has a resilient support der- io buffer rods 19, on which the am

like shape that they the curved part of the metal cutting tool 4 attached projections 18 in the

Attack strip 10 over its entire width or part of the downward movement of this tool. There-

the same can support. The bent through the blocks 14, 15 are moved downwards,

Longitudinal edges 11, 12 of the metal strip are so that the metal strip 10 between the blocks

initially unsupported. 15 14,15 and the underside of the recess 9

When a profiled metal is clamped with the device. The cylinders 16 is through

strip must be cut or a piece of hoses or pipes 20 supplied with compressed air, so

the strip is to be cut off, the procedure is that the punches 13 are moved downwards,

follows: This causes holes or lips in the

After the metal strip 10 is punched into the cut-out strips. At the same time, the separating

tion9 is introduced, the cutting tool4 is further down after tool4 until the punching knife?

moved down. The saw blades 5, 6 come so far downwards that there is a strip off

the bent longitudinal edges 11 and 12 in the base stamps the metal strip 10, which has a width,

tion. If now the metal strip 10 is not equal to or almost equal to the width of the saw slots

is in the correct position in the device, d. H. 25 is the same. All of these edits take place in one

for example is inserted too far to the right, the single working stroke of the cutting tool 4 takes place,

the right saw blade 6 comes first with the metal after removing a piece of the metal strip in this way.

strip 10 in contact. However, since the metal window 10 has been separated, the separating tool 4

strip 10 in the recess 9 move laterally upwards until the device is back in

and the left saw blade is not yet in its starting position.

Is touch, it is from the right saw blade 6 after pressed. If, however, the metal strip 10 is saving 9 of the space between the bottom too far to the left, the left saw blade pushes the blocks 14, 15 and the top of an area Strip to the right. The saw blades 5 and 6 stempeis or frame part 21 formed in which bring the metal strip 10 into the 35 openings 22 in this way. Through these openings 22 correct position in the slot 9 and center it with it. the parts punched from the metal strip fall Then the two are bent down. The blocks 14, 15 rest on not shown longitudinal edges 11 and 12 of the saw blades 5,6 put springs so that they could be lifted up sawed through. of the cutting tool 4 automatically upwards

The fact that the profiled metal strips 10 40 gene.

always through the saw blades 5 and 6 in the correct To operate the cutting tool 4 is at the

Position are brought into the recess 9, the illustrated embodiment of the invention in

Achieved advantage that the cutting tool 4 or an opening 23 of the frame 1 is a pneumatic

several punches 13 can be assigned, piston-cylinder unit is arranged, the KoI-

with the help of which, at the same time as the cutting through, the Lö- ben bar is connected to the cutting tool 4.

1 sheet of drawings

Claims (1)

contacting saw blade due to lack of resistance Claim: the without significant attack of the saw blade for Is shifted towards the middle until the other saw Device for cutting through thin metal sheet attacks and with noticeable cutting pressure of the strip with flanged or bent 5 counteracts further displacement. So it will Longitudinal edges, in which in a frame one reaches that already at the beginning of the saw cuts the The cutting tool can be moved up and down, the metal strip automatically in the target position for the two with their teeth turned towards each other, between separation processes is brought about after the beginning see the saw cuts forming a wedge-shaped gap no longer change anything essential Saw blades for cutting through the flanged- io leaves. long or bent longitudinal edges as well as the It is already a machine for cutting through Saw blades on the above, narrowest NEN of shaped iron known (German patent Point of the wedge-shaped gap bridging 75 517), in which, however, the cutting edge on the side of the workpiece or punching knife for cutting through gripping saws with one acting from above Part 15 located between the longitudinal edges does not form a uniform part of the punching device of the metal strip, marked drawn separating tool are summarized. The side net through the use of the wedge-shaped sawing and the punching device require rather ordered saw blades (5,6) as a device, the separate guides and drives, which is an un- j in the downward movement of the cutting tool represents the construction effort required by the (5 to 8) the one-piece separator metal strips used in the device of the invention incorporated into the device (10) in the target position for the separating tool is avoided. After all, it is still known processes. (U.S. Patent 1,593,349), for centering .j a metal strip to be chipped or embossed | fens to provide lateral guide links on which j 25 of the metal strips for the purpose of centering ent- j is long led. There is the disadvantage that once the introduction of the metal strip by hand The invention relates to a device for moving into the relatively narrow guide slot Cutting through thin metal strips with beading is difficult and, on the other hand, it is difficult to slip th or bent longitudinal edges, in the case of 30 of the strip with its longitudinal edges on the feet Frame a parting tool up and down friction links to a scuffing one on the is possible that two can lead each other with their teeth to strips of applied varnish. Such inverted, between them a wedge-shaped gap from guide members are therefore z. B. for roller shutter blades Saw blades for cutting through the surrounding areas, which are usually already colored or varnished beaded or bent longitudinal edges as well as a 35 state are processed, unsuitable. The invention Saw blades on the narrowest manure above avoids this deficiency, because with her this Part of the wedge-shaped gap bridging cutting tool itself at the same time also the centering cutting or punching knife to cut through the ring of the inserted metal strip, between the longitudinal edges of the part of the me- special guide links are thus eliminated, having tallstreifens. 40 The following description of a preferred In the case of known devices of this type, the preferred embodiment of the invention is used in the Zu- (German Patent Specification 885 952) serves the wedge connection with the drawing of the other explanations Gap widened between the saw blades: It shows, j send cutting tool only the actual diameter Fig. 1 is a longitudinal section of a preferred embodiment! · separation of a metal profile. The metal profile itself 45 guide a device according to the invention | must be brought into its target position beforehand, d. H. relative dung, ί centered on the cutting tool and fixed there, e.g. B. F i g. Figure 2 shows a cross section of the device be clamped. A centering device is the line II-II from Fig. 1 and but on the one hand represents an additional component and brings F i g. 3 a cross section of a thin metal on the other hand, there is the shortcoming that a strip that has to be crossed with bent longitudinal edges and which is marked with j separating, thin metal strip with beaded device according to the invention severed Longitudinal edges, especially if the strip can be loaded. ■ j is already painted, will be damaged when centering The device shown in the drawing is can. stands from a frame 1 in which guide j The object of the invention is therefore in relation to 2, 3 for a separating mechanism base that can be moved up and down, with a device 4 of the generic type being provided. The means for assembly and centering Abspeziclle that the movement to be carried to the slicing tool 4 can in a known j separating metal strips in its set position brings ter manner, for example hydraulically, pneumatically or me- 'to save. be trained chanically and are in detail j ■. The object is achieved according to the invention in that 60 is not shown. that the wedge-shaped arranged saw blades as one The cutting tool4 consists of two diagonally from direction are used, the saw blades tapering downwards downwards 5,6 movement of the cutting tool into the device and one located between these saw blades j introduced metal strips in the target position for the cutting or punching knife 7, which the wedge-shaped Bringing separation processes. 65 Gap between the saw blades 5,6, at the top According to the invention proposal, this bridged the narrowest point located downwards. The Sägebewcgtc Separating tool the effect that an out-of-blades5,6 are centered with the punching knife7 to one lying metal strip through which it first unites umpteen, up and down movable structural unit.