DE2352573C3 - Sheet metal edge bending device in a system for manufacturing cylindrical hollow bodies, in particular seam-welded steel pipes - Google Patents

Description

FiR. 3 a bending tool in a position for a sheet with the sheet thickness = s,

Fi * 4 a part of a lower tool,

If 5 the bending of a sheet metal with a small Antoeeradius,

v \ v 6 bending a sheet metal with a medium / ae radius,

Fi β 7, the pre-bending a sheet with a large arrival W "sradius

Fi £. 8 ε »ή ^εη Tool set in the form of profile rollers

in Fig. 1 is a sheet metal edge bending device «The characteristics of claims 1 to 3 are shown. ^ TJ two facing open C-frames 5, istadformgebende tools 1, Γ arranged, the will consist of an upper tool 2 and a lower tool 3 exist. The upper tool has a and the lower tool a corresponding tartare. The UnterweFkzeug 3, 3 'rests äger 4,4 'and is independent of this as well as the upper tool S-locks can be displaced. To the differentiTSSSSi are corresponding means 7, 8 hen The tool carrier 4 itself is fixed with hydraulic cylinder 6 connected, Leig required via the bending of the sheet metal edges The bottom tool 3, 3 '

k 2 2 'which is a vertical adjustment to slide the lower tool 3 of the lower tool 3 required, however, when using dies in the working stroke itself is included in a manner known per se. When

additional measures taken for granted by the specialist is the vertical adjustment of the lower tool compared to the upper tool when in use of forming tools in the form of rollers in the continuous bending of the strip edge, i.e.

»In the case of tools as shown in FIG.

It should be pointed out at this point that the pivot axis 11 of the upper tool 2 also m the center of the circle of the contour 17 of the upper

Tool 2 in the basic position 14 generating involute base circle can be placed. In this In this case, simply pivoting the upper tool is sufficient

for adaptation to different sheet metal thicknesses

* ° from the actual bending tool 2 that this Solution to additional construction costs can lead. It would also be conceivable through guides of the bolt 13 in a setting a pivoting of the Upper tool 2 around the involute base circle

* 5 simulate center point. "purify

Furthermore, referring to FIG. 2 2, """says that the contour of the upper tool > ™ ^ £ ™ of the lower tool is only essentially one and the same section of an involute of a circle

12,12 'pivotable and lockable 30 ^ Α ^ ΑΑ ^iSt bie C-frame 5,5' are in a known manner on Neten tape thickness range over the extent of the

& GÄ »Ä HESS

16 of the lower tool 3 essentially a and are the same excerpt from a circular involute as such is indicated in FIG. 4. The development of a circle involute or a certain segment the same, with a desired smallest radius 45 rl, is also mathematically positive for a person skilled in the art is loaded in the direction of an arrow ^^ Jfil 25 shift-

_{that Qnne each}

'kl 2 opposite the

Bending radii at

2S K = AA ^,

Circular involute continuous transition from radius rl to radius r3 takes place.

in Fig. 2 the upper tool 2 lies on the lower tool 3 opens and closes between them a theoretical Gap with gap thickness 5 = 0 em. To come now to the setting according to FIG. I ^, jj starting from the position according to FIG. 2, the upper tool 2 around the axis 11 of a fixed boom 13 pivoted from zero 14 in

B && 1 £ Άν ££? ΑΆ It

in tig.

It ^ ^ _reproduced tool senses that area of the band edge of the entge _r adius present 29 which then gradually descend-send the further course of the curves of larger _{radius, we} therefore the pre-bending a d

^ "1 ₆ f _or a pipe in the middle and inen ^. ö ^ ^ _Ό ^

/ me «■» » _{die d ichnete} n

that there is now a gap * 'which is constant over the entire deformation range. u " _n

For mutual P ° ^"tionierun 8 ^d" _r J ° ™ Aer the tools each of the upper tool 2 and the V ER- ^^ is of course in addition to the Shk | _{er the} ßanddicke equal, all radii of curvature of the lower tool and the smaller the sand thickness 5 of the upper _{tool «™ ^ the calibrated center of} curvature has

pie invention makes it possible to use one and the same shaping tool set for different bending radii and different sheet metal thicknesses while solving the problem according to the invention. The width b of the tool is essentially determined by the area of radii to be molded.

In a? The numerical example of a lower tool according to FIG. 4 shows the relationships represent.

Tool width
Bending area

Smallest pipe diameter of the tool area
Largest pipe diameter of the tool area
Radii of curvature
T ₁ - 12 - dl _mi "/ 2
T ₁ about 17.5 "= d ^ / 2
r, about 24 "

b - 285 mm at least V _{15 of} the respective finished pipe circumference

d _mi "= 24" d, = 35 "

In addition 5 sheets of drawings

Claims (1)

^; 'Γ- ■ ^χ in the production of large pipes from thick-walled Claims: Sheet metal dies application that the Bandkan areas over the entire length of the sheet in one Γν · ί L Bend sheet metal edge bending device in one go. It is no problem ° location, for the production of cylindrical hollow bodies, 5 th, for a certain bending radius and a leg in particular Seam-welded steel pipes, with sheet thickness agreed a shaping tool ; to create the two opposite each other, ensuring that the gap is between the two The upper tool and lower tool assigned to the band edge areas can be seen via the Forming tool sets, the upper entire forming area of which is constant. Provided tool each one convex and its sub- "> but either the bending radius is to be changed, a tool with a correspondingly concave contour or sheets of a different thickness are used, has constantly changing curvature and where can the constancy of the gap between the works Upper tool and lower tool relative to-; - attest only by replacing the same adhered to are mutually movable, are thereby identified. In a facility with a wide range of products shows that the contour of the upper tool copes with> s in terms of pipe diameter and wall thickness (2) and the contour of the lower tool (3) is therefore a correspondingly wide range to have matching sections of a circle of various tools ready and it vente are. is inevitable that by replacing the 2. Sheet metal edge bending device after tooling dead times arise, which the economic claim 1, characterized in that the upper »influence the facility. So in the tool (2) around a practice parallel to the bending axis occasionally compromises in such a way that Axis (11) pivotable and in detail that a certain set of tools for different Pivot positions can be determined and that the sheet thickness is used and accepted, Lower tool (3) independent of the upper tool - that the constancy of the gap is not for all sheet metal tools (2) parallel to that obtained by the two opposites. This also applies to the device overlying pivot axes (11, 11 ') according to DT-PS 1055485, in which the work surface upper tools (2, 2 ') certain plane in the surface of the tools should have the shape of an ellipse or the like in the direction of the opposite substation. tool (3 ') displaceable and in individual shifts. The object of the invention is to provide a sheet metal edge orders can be determined. 30 to create a bending device with which, without a tool 3. To have to change sheet metal edge bending device according to the indication, different sheet metal claims 2, in which the shaping tools ken and copes with various bending bends Dies are characterized in that that can be, in each case between the Lower tool (3) each on one with an upper tool and the lower tool one of the hydraulic working cylinder (6) connected, 35 sheet thickness corresponding constant gap should be movable in the direction of the upper tool (2). Chen tool carrier (4) rests, un the means (7, This task can be achieved according to the invention 8) for moving and determining the lower looseness that the contour of the upper tool and the Tool (3) on the tool carrier (4) in front of the contour of the lower tool matching are seen and that Stellmit- 40 sections of an involute of a circle are on the upper tool. Through the tel (12) for pivoting the same around a formation of the contour as a circular involute can Attack the fixed axle (11). the tools in every case and with every sheet metal Adjust the thickness so that the gap is constant. 45 An embodiment of the invention is preferred which is characterized in that the upper tool can be pivoted about an axis parallel to the bending axis The invention relates to a sheet metal edge bending and can be locked in individual pivoting positions, device in a plant for manufacturing cylindrical and that the lower tool is independent of the upper shear Hollow body, in particular a seam-welded tool parallel to that through the two opposite steel tubes, with opposite, the lying pivot axes of the upper tools both Belt edge areas to be bent are drawn in the correct direction both in the positive and in the arranged, shaping tool sets, whose negative sense affects the opposite lower-upper tool one convex and its un-tool can be shifted and in individual shifting tools a corresponding concave contour can be established in 55 positions. has and where upper tool and lower tool The invention can also be applied to shaping are movable relative to each other. Tools in the form of profile rollers successfully Such a device can be found in the DT-PS. 485 known. The particular advantages of the invention are at Is known to require the production, in particular 6 ₀ highlighted the more detail the following description of the figures seam welded steel pipes, a pre-bending. Meanwhile, off-band edge areas are laid down on the final radius of the exemplary embodiments of the invention. The pipe to be produced shows a flawless position of the strip edges to be welded in the slotted tube Fig. 1 is a front view of a sheet metal edge attachment to ensure each other. S ₅ device for bending sheet metal by means of While for the continuous molding of a die in the schematic representation K ^ ^21161116 S ¹ ?. ^chlltzrohr foimgebende tools Fig. 2 a bending tool in the closed position are used in torrn of a roller set, find for a sheet with the theoretical sheet thickness 5 = 0