CA2063719A1 - Process and device for making a plate from a strip - Google Patents
Process and device for making a plate from a stripInfo
- Publication number
- CA2063719A1 CA2063719A1 CA 2063719 CA2063719A CA2063719A1 CA 2063719 A1 CA2063719 A1 CA 2063719A1 CA 2063719 CA2063719 CA 2063719 CA 2063719 A CA2063719 A CA 2063719A CA 2063719 A1 CA2063719 A1 CA 2063719A1
- Authority
- CA
- Canada
- Prior art keywords
- sheet metal
- metal plates
- folding
- strip
- edges
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D31/00—Shearing machines or shearing devices covered by none or more than one of the groups B23D15/00 - B23D29/00; Combinations of shearing machines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/02—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal by folding, e.g. connecting edges of a sheet to form a cylinder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
- B21D5/08—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles making use of forming-rollers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
In a process for making a plate (113), in particular a single rolled galvanized metal sheet, from a strip, in particular for making thin-walled channel elements, transverse walls at right angles to the two longitudinal walls are formed from pieces (105) of identical length, preferably cut from a strip (103). One longitudinal wall of each piece (105) is joined on to the other longitudinal wall of the previously cut piece (105) and connected along its length to that of the previously cut piece (105). The plate (113) is cut from the new, wider strip (110) formed from the cut pieces (105). A device for implementing the process comprises a first cutting device, a first transport device, a folding machine (107), a second transport device (111) and a second cutting device (112).
Description
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; Process for Making a Plate from a Strip and Device for Implementing the Process The invention relates to a process for making a plate, in particular of galvanized sheet metal, from a strip, in particular for producing thin-walled channel elements. In ~- addition, the invention relates to a device for implementing a process of this type.
'' For the production of thin-walled channel elements from galvanized sheet metal for air-conditioning systems, the sheets required for producing the chznnel elements are customarily cut from a strip which is withdrawn from a roll. Since, on the one hand, the channel elements are generally more than two meters in length and, on the other hand, the commercial rolls of galvanized sheet metal have a much narrower width, considerable waste generally occurs when cutting the sheets out of a strip.
Even if this waste is collected, the costs are also considerably increased by the collecting, sorting and storing.
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The object underlying the invention is to improve a process of the type described at the outset such that plates of any optional size and with as little waste as possible result when a strip of conventional width is used as starting material.
This object is accomplished by a process having the features of claim 1. Devices for implementing such a process are the subject matter cf claims 4 - 17.
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Due to the fact that a new strip having a width corresponding exactly to the requirements can be produced from the pieces on account of the free selection of piece length, it is merely necessary to cut sections having the required length from this new strip to obtain sheets which have exactly the desired width and length. Waste is, in this case, normally avoided completely. Only if a point of connection between two consecutive pieces has an unfavourable position when cutting the plates from the new strip, will the new strip have to be shortened accordingly at its beginning.
' It is possible to join the pieces along their sides extending in the transverse direction of the new strip in various ways. For example, the pieces can be soldered together or welded together. Generally, it is, however, more advantageous for these pieces to be joined to one another by a fold.
Particularly when the first strip is withdrawn from a roll, the new strip can then be produced fully automatically and without problem because both the cutting of the pieces from the first strip and the joining of these pieces to form a new strip can be carried out fully automatically. It is, of course, also possible to cu-t the plates or sheets fully automatically from ~ the new strip.
: In the following, the invention is explained in greater detail on the basis of one embodiment illustrated in the drawings. In the drawings, Figure 1 is a plan view of a schematically illustrated - device for producing sheets from a strip;
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Figure 2 is a schematically illustrated side view of this device;
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Figure 3 is a partial side view of a device for joining the edges of two sheet metal plates by folding;
Figure 4 is a sectional view of the device along line 4-4 in Figure 3;
Figure 5 is a view of a movable folding head enlarged in comparison with Figure 3;
Figure 6 is a plan view of the folding head seen in the direction of arrow A in Figure 3 and Figures 7 are sectional views along the respectively to 17 corresponding lines in Figure 5.
A device for making plates of metal, in particular of galvanized sheet metal, comprises a stand 101, in which at least one coil or roll 102 of commercial size, preferably, however, a plurality of coils having a horizontal axis can be rotatably mounted.
Insofar as the stand 101 can receive a plurality of coils, coils having metal sheets of varying widths and/or strengths can be provided in the stand 101.
A withdrawing device, which is designed in the known manner and not illustrated, withdraws from the coil 102 the strip 103 wound thereon and guides it to first shears 104. These first shears 104 are equipped with a means enabling pieces 105 of any selectable length to be cut from the strip 103. The cut is always made at right angles to the lateral edges of the strip 103 so that the pieces 105 have a rectangular shape.
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Each of the cut pieces 105 is placed on a first transport device 106 which transports the cut piece 105 at right angles to the direction of transport of the strip 103 to a folding machine 107 or other joining machine. The transport device 106 is illustrated schematically in Figure 2 as a roller conveyor. It feeds the pieces 105 to the folding machine 107 in such a manner that the sides 105' resulting from the cut of the first shears 104 are aligned with one another, as shown in Figure 1.
The folding machine 107, which will be described in detail later on, has a folding device which is not illustrated and which is displaced back and forth transversely to the direction of transport of the pieces 105 on the rail 108 and hereby joins together the pieces 105 immediately following one another by a fold 109 to form a new strip 110. The width of this new strip 110 can be adapted exactly to the requirements since it is determined by the freely selectable length of the pieces 105 which can be adjusted at the first shears 104.
The new strip 110 is supplied to second shears 112 by a second transport device 111, which is also schematically illustrated in Figure 2 as a roller conveyor, in the same direction in which the pieces 105 are fed to the folding machine 107. These second shears 112 automatically cut sheets or plates 113 from the new strip 110. The length of the sheets 113 measured in the direction of transport can be optionally selected.
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The plates 113 are, for example, bent to form channel elements and closed by a further folding process in the longitudinal side ; which is first of all still open. The length of these channel elements corresponds to the width of the new strip 110 which is why these channel elements can be produced without any waste ,.' ' .
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resulting. The folds formed by means of the folding machine 107 extend in the longitudinal direction of these channel elements and therefore lead in the desired manner to a reinforcement of the wall surfaces of the channel elements.
The folding device for sheet metal plates which will now be described on the basis of Figures 3 - 17 enables the sheet metal plates to be guided and held securely prior to and during the folding as well as to be pressed towards one another automatically during the actual folding process. In the course of adding further sheet metal plates to plates already joined together to form a strip this can be done without any lengthy return movement of the plates already joined to form a strip.
As shown in Figures 3 and 4, a device 1 for joining the edges of two sheet metal plates by folding comprises a machine frame 2 which is merely indicated schematically in the drawings and on the upper side of which a support surface for two sheet metal plates 4 and 5, respectively, is formed from rectangular profiled carriers 3. As is apparent from Figure 4, the suppor-t surface formed by the profiled carriers 3 consists of two sections which are divided by an intermediate space over the entire length of the machine frame. The free edges of the sheet metal plates 4 and 5 protrude into this intermediate space in such a manner that they overlap one another and, at the same time, are held in vertical, mutually spaced relationship, cf.
Figure 4. The edges or borders of the sheet metal plates 4, 5 extending at right angles to the aforementioned, overlapping edges rest against a stop bar 6 extending at right angles thereto. This stop bar is rigidly connected to the machine . . .
frame 2. In the region of the stop bars 6, clamping means, for example in the form of hydraulically lowerable clamping jaws 7, '' .
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are provided on both sides of the intermediate space dividing -the support surface. These clamping jaws are merely indicated schematically in Figures 3 and 4 and with their help the sheet metal plates 4, 5 can be fixed in position at the stop bar 6 and on the support surface.
In the center of the intermediate space formed in the support surface for the sheet metal plates 4, 5, cf. Figure 4, a relatively powerful double-T carrier 8 extends in the lower part of the machine frame and this carrier is rigidly connected with the machine frame 2. This carrier 8 extends over the entire length of the machine frame 2 and protrudes beyond this on one or both sides, as is apparent from Figure 3. A carriage 12 is displaceably guided on the carrier 8 in the longitudinal direction of the device 1 with the aid of rollers 9, 11. The carriage 12 is hereby supported with the rollers 9 on the upper side of the carrier 8 while it is guided with the rollers 11 laterally on the central web 8 of this carrier. In the manner shown in the drawing, a gear rack 13 is rigidly connected with the double-T carrier 8 and a pinion 14 rotatably mounted on the carriage 12 engages therein. The carriage also mounts an electric motor 15 which is connected with the pinion 14 via a conventional (reversing) gear which is not illustrated. When the pinion 14 is driven by the motor 15, the carriage 12 runs back and forth on the guideway formed by the carrier 8.
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A folding head 16 (which will be described later on) is rigidly, but interchangeably, connected with the upper side of the carriage 12. When the folding head 16 is advanced with the carriage 12 in the direction of arrow V (Figure 3), the two free edges of the sheet metal plates 4, 5 are grasped by the folding head and gradually (in a manner still to be described) joined to '' :
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one another by a fold. When the folding head 16 has passedalong the entire length of the free edges of the sheet metal plates 4, 5, these plates, which are now joined to one another by the fold, can be removed from the machine frame, whereupon the carriage 12 with the folding head 16 can be returned to the initial position (illustrated in Figure 3) by a corresponding reversal of its drive.
In the following, the construction and mode of operation of the folding head 16 will be described.
The folding head 16 comprises an inlet end 17 and an outlet end 18 (Figure 3). At the inlet end 17 the free edges of the sheet metal plates 4, 5 to be joined enter the folding head 16, at the outlet end 18 the edges of the sheet metal plates which are now joined by the fold exit from the folding head 16 again.
At the inlet end of the folding head 17, an upper pocket 21 and a lower pocket 22 are arranged to receive the free edges of the sheet metal plates 4 and 5, respectively. The construction of these pockets 21, 22 is best apparent from Figure 7. The pockets are arranged in vertical, mutually spaced relationship and overlap one another. They each comprise two plates 24 and 25, respectively, which are kept spaced from one another by a spacer member 23 and the plates 25 extend so as to be angled downwardly or upwardly so that outwardly widening insert openings are formed for the sheet metal plates 4, 5 which are open towards opposite sides. With the aid of setscrews 26 the overlapping region of the pockets 21, 22 at the folding head 16 can be suitably adjusted.
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During the folding process the lip edges of the sheet metal plates 4, 5 are slidingly supported on the bottoms of the pockets formed by the spacer members 23. Pocket bottom and lip edge hereby extend parallel to the advancing direction V of the folding head 16.
Several preforming rollers are rotatably arranged in pairs on the folding head 16 behind the pockets 21, 22 in the advancing direction V. These pairs of rollers each receive between them the edge of a sheet metal plate 4 or 5 and deform this during movement of the folding head 16. As best shown in Figures 5 and 6, two pairs of preforming rollers 31, 32 are arranged at the relevant section of the folding head 16 and these are associated with the sheet metal plates 4 and 5, respectively. The axes of rotation D of these pairs of rollers 31, 32 are located in horizontal planes; they do not, however, extend at right angles to the advancing direction V but are inclined thereto at a small angle a of, for example, 1 to 6, preferably 2 to 4 (Figure 6).
The axes of rotation D of the pairs of preforming rollers are also inclined at this small angle towards the bottom of the pockets 21, 22. Due to this inclined positioning of the axes of rotation D of the pairs of preforming rollers, a component of movement directed towards the bottom of the pockets 21, 22 is imparted to the sheet metal plates 3, 4 during the forward movement of the folding head 16, as soon as they are grasped by the rollers of the respective pairs, and this component of movement causes the edges of the sheet metal plates to be securely supported on the bottom of the pockets so that the lip edges take up a constant position essential for the formation of a firm and precise fold. Without such a component of movement the lip edges could become detached from the bottom of the pockets and this would impair the quality of the fold formed.
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The profile of the pairs of preforming rollers 31, 32 is apparent from Figures 8 and 9. These figures also illustrate the respective edge profile of the sheet metal plates 4, 5 produced by the relevant pairs of rollers, and for the sake of clarity away from the pairs of rollers. It can be seen that due to the profiling of the pairs of rollers 31, 32, trough-like guide channels 35 and 36 are formed in the sheet metal plates 4 and 5, respectively, and by a corresponding bead 33 or a corresponding recess or groove 34 in the rollers at the edge of the sheet metal plates 4, 5. Correspondingly profiled forming rollers, which follow the pairs of preforming rollers 31, 32, engage in these guide channels 35, 36 such that the sheet metal plates 4, 5 are hereby held in an exactly defined, lateral spaced relationship relative to one another.
As shown, furthermore, in Figures 5 and 6, the pairs of preforming rollers 31, 32 are followed by pairs of forming rollers 37, 38 which are also rotatably mounted on the folding head 16 and the profile of which is apparent from Figures 10 and 11. In particular, these figures also show the design of these pairs of rollers 37, 38 with corresponding beads 39 or grooves 41, which positively engage with the guide channels 35, 36 of the sheet metal plates 4, 5 mentioned on the basis of Figures 8 and 9 and exactly position these sheet metal plates as the folding head runs past. Figures 10 and 11 again illustrate the profile at the edges of the sheet metal plates which is produced by the pairs of forming rollers 37, 38.
Following the section of the folding head 16 bearing the pairs of rollers 31, 32, 37, 38 is an additional section 42 (Figures 5 and 6) which includes guideways 43, 44, by which the sheet metal plates 4, 5 initially kept at a vertical distance from one , . , , : :
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another are brought together as the folding head 16 continues to move forward. Figures 12 and 13 show sectional views of these guideways at the beginning and end, respectively, of this folding head section 42. In Figure 12, the two sheet metal plates 4 and 5 are still spaced as predetermined by the pockets 21, 22 and the pairs of forming rollers 37, 38, respectively.
In Figure 13, the edges of the sheet metal plates 4, 5 are, in contrast, considerably closer to one another.
In the region of the guideways 43, 44, guide members 45 and 46, respectively, are securely arranged in addition at the folding head section 42 and protrude with their free edge regions into the guideways 43, 44. Bent edge sections of the sheet metal plates 4, 5 are slidingly supported at the free edge regions of the guide members 45, 46 so that the two sheet metal plates 4, 5 are hereby held in proper, lateral spaced relationship to one another even as the section 42 passes through.
The folding head section 42 is followed by an additional section 47 which is illustrated in the respective cross-sectional views in Figures 12 to 15.
As shown in Figure 14, the edges of the sheet metal plates 4, 5 brought together by the guide members 45, 46 in accordance with Figure 13 reach in the folding head section 47 into profiled grooves 48, 49, in which the edges of the sheet metal plates continue to be deformed and brought closer together during forward movement of the folding head 16. In this case, shaping is carried out not with the aid of rolling but with the aid of sliding folding elements ("sliding shoes"). The shape and arrangement of the deformed edges of the two sheet metal plates is also illustrated in Figure 14, and outside the profiled grooves 48, 4g for the sake of better clarity.
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Figure 15 shows the gradual change in shape of the profiled grooves 48, 49, which takes place during the transition from Figure 14 to Figure 15. As well as the deformation and arrangement of the edges of the sheet metal plates now reached.
, Another two pairs of forming rollers 51, 52 are arranged at -the folding head section 47 behind the profiled grooves 48, 49 and their cross-sectional profile is illustrated in Figures 16 and 17 together with the sheet metal edges which are now completely folded together. The two pairs of forming rollers 51, 52 comprise a lower roller 53 having a circular-cylindrical casing, on which an upper roller 54 having two lateral beads 56, 57 enclosing the fold 55 is supported. Each fold 55 is finally pressed together between the two rollers 53, 54, whereby the trough-like guide channels 35, 36, which are formed previously and have already been described, are flattened out again completely once a preliminary flattening has already taken place in the profiled grooves 48, 49 (cf. Figure 15). -:~
In Figure 4, it is assumed that the folding head 16 has already been moved forward out of its initial position illustrated in Figure 3 to such an extent that the pockets 21, 22 are at least partially located in the intermediate space between the receiving surfaces for the sheet metal plates above the double-T
carrier 8. This means that the two sheet metal plates 4, 5 can be inserted from both sides into the pockets 21, 22 prior to being clamped by the clamping jaws 7 and this gives them their mutually overlapping position in vertical, mutually spaced relationship. In the preferred embodiment of the device as described, a spreader means 60 is provided at the inlet side 17. This spreader means spreads apart the sheet metal plates 4, 5, which are first of all arranged on the support surface in the . .
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ou-t of the initial position illustrated in Figure 3. The spreader means 60 comprises, as shown in Figures 3, 5, 6 and 7, spreading members 61, 62 protruding from the inlet side 17 and having inclined faces 63 and 64, respectively, directed at an angle to the sheet metal plates 4, 5. When the folding head 16 is moved forward out of the initial position illustrated in Figure 3, the spreading members 61, 62 engage with their upwardly or downwardly directed inclined faces 63, 64 on the edges of the sheet metal plates 4, 5 which are already firmly clamped on the support surface. In this respect, the edge of the sheet metal plate 4 is lifted by the spreading member 61 and introduced into the pocket 21 and the edge of the sheet metal plate 5 is lowered by the spreading member 62 and introduced into the pocket 22.
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As already stated, the folding head 16 of the preferred embodiment is arranged on the carriage 12 so as to be interchangeable. This means that the device can easily be changed over to other folding shapes, for example also depending --on different sheet metal thicknesses, by mounting on the carriage the folding head required each time.
It is, in principle, possible to replace the folding elements formed by rotatable forming rollers and described in the aforesaid by sliding shoes stationarily provided on the folding head or folding block. On the other hand, sliding shoes, which are described in the aforesaid on the basis of the profiled grooves 48, 49, can, if necessary, also be replaced by forming rollers.
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- 13 - 2~37~9 The essential advantage of the inven-tion is to be seen in the fact that the sheet metal plates to be folded together remain exactly positioned relative to one another during the folding process and this, finally, facilitates an excellent folding of the two sheet metal plates 4, 5. In the first place, the inclined axes of rotation of the pairs of preforming rollers 31, 32 bring about the exact positioning of the sheet metal plates, which causes a component of movement directed towards the bottom of the pockets 21, 22 to be imparted to the sheet metal plates from the beginning. If necessary, the axes of rotation of subse~uent pairs of rollers, e.g. the pairs of rollers 37, 38, could also be inclined in the specified manner.
In addition, the exact, lateral positioning of the sheet metal plates 4, 5 relative to one another during folding is .
contributed to by the fact that the edges of the sheet metal plates are automatically guided by the cross-sectional profiles :
as mentioned (beads 33, 39 and grooves 34, 41) of the pairs of rollers 31, 32, 37 and 38. Such an automatic guidance which serves to exactly position the sheet metal plates is also effected by the guide members 45, 46 in the guideways 43, 44 before the edges of the sheet metal plates finally come together to form the fold 55 in the profiled grooves 48, 49 and between the pairs of rollers 51, 52.
However, essential for forming an exact fold is also the inventive clamping of the sheet metal plates 4, 5 in the region of their front edges, which extend at right angles to the edges to be folded together, at the stop bars 6 with the aid of the clamping means 7 and the fact that the folding head 16 moves away from this clamped front edge of the sheet metal panels 4, 5 during formation of the fold 55. This means that stresses can, ': . : , - 14 - 2~37~
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if necessary, be compensated towards the rearward end of the sheet metal plates and a certain relative expansion of the sheet metal plates can take place which also has a favourable effect on the quality of the fold. Such a favourable effect would not occur if the sheet metal plates were to be clamped at their rear edge regions and the folding head were to move towards this clamped edge during folding.
The device comprising a forwardly moving folding head 16 is of advantage in comparison with a folding block mounted stationarily on the machine frame because in the case of stationary sheet metal panels and a moving folding head additional sheet metal plates can be added by folding without any lengthy return movements of the sheet metal plates which are joined together being necessary.
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; Process for Making a Plate from a Strip and Device for Implementing the Process The invention relates to a process for making a plate, in particular of galvanized sheet metal, from a strip, in particular for producing thin-walled channel elements. In ~- addition, the invention relates to a device for implementing a process of this type.
'' For the production of thin-walled channel elements from galvanized sheet metal for air-conditioning systems, the sheets required for producing the chznnel elements are customarily cut from a strip which is withdrawn from a roll. Since, on the one hand, the channel elements are generally more than two meters in length and, on the other hand, the commercial rolls of galvanized sheet metal have a much narrower width, considerable waste generally occurs when cutting the sheets out of a strip.
Even if this waste is collected, the costs are also considerably increased by the collecting, sorting and storing.
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The object underlying the invention is to improve a process of the type described at the outset such that plates of any optional size and with as little waste as possible result when a strip of conventional width is used as starting material.
This object is accomplished by a process having the features of claim 1. Devices for implementing such a process are the subject matter cf claims 4 - 17.
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Due to the fact that a new strip having a width corresponding exactly to the requirements can be produced from the pieces on account of the free selection of piece length, it is merely necessary to cut sections having the required length from this new strip to obtain sheets which have exactly the desired width and length. Waste is, in this case, normally avoided completely. Only if a point of connection between two consecutive pieces has an unfavourable position when cutting the plates from the new strip, will the new strip have to be shortened accordingly at its beginning.
' It is possible to join the pieces along their sides extending in the transverse direction of the new strip in various ways. For example, the pieces can be soldered together or welded together. Generally, it is, however, more advantageous for these pieces to be joined to one another by a fold.
Particularly when the first strip is withdrawn from a roll, the new strip can then be produced fully automatically and without problem because both the cutting of the pieces from the first strip and the joining of these pieces to form a new strip can be carried out fully automatically. It is, of course, also possible to cu-t the plates or sheets fully automatically from ~ the new strip.
: In the following, the invention is explained in greater detail on the basis of one embodiment illustrated in the drawings. In the drawings, Figure 1 is a plan view of a schematically illustrated - device for producing sheets from a strip;
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Figure 2 is a schematically illustrated side view of this device;
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Figure 3 is a partial side view of a device for joining the edges of two sheet metal plates by folding;
Figure 4 is a sectional view of the device along line 4-4 in Figure 3;
Figure 5 is a view of a movable folding head enlarged in comparison with Figure 3;
Figure 6 is a plan view of the folding head seen in the direction of arrow A in Figure 3 and Figures 7 are sectional views along the respectively to 17 corresponding lines in Figure 5.
A device for making plates of metal, in particular of galvanized sheet metal, comprises a stand 101, in which at least one coil or roll 102 of commercial size, preferably, however, a plurality of coils having a horizontal axis can be rotatably mounted.
Insofar as the stand 101 can receive a plurality of coils, coils having metal sheets of varying widths and/or strengths can be provided in the stand 101.
A withdrawing device, which is designed in the known manner and not illustrated, withdraws from the coil 102 the strip 103 wound thereon and guides it to first shears 104. These first shears 104 are equipped with a means enabling pieces 105 of any selectable length to be cut from the strip 103. The cut is always made at right angles to the lateral edges of the strip 103 so that the pieces 105 have a rectangular shape.
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Each of the cut pieces 105 is placed on a first transport device 106 which transports the cut piece 105 at right angles to the direction of transport of the strip 103 to a folding machine 107 or other joining machine. The transport device 106 is illustrated schematically in Figure 2 as a roller conveyor. It feeds the pieces 105 to the folding machine 107 in such a manner that the sides 105' resulting from the cut of the first shears 104 are aligned with one another, as shown in Figure 1.
The folding machine 107, which will be described in detail later on, has a folding device which is not illustrated and which is displaced back and forth transversely to the direction of transport of the pieces 105 on the rail 108 and hereby joins together the pieces 105 immediately following one another by a fold 109 to form a new strip 110. The width of this new strip 110 can be adapted exactly to the requirements since it is determined by the freely selectable length of the pieces 105 which can be adjusted at the first shears 104.
The new strip 110 is supplied to second shears 112 by a second transport device 111, which is also schematically illustrated in Figure 2 as a roller conveyor, in the same direction in which the pieces 105 are fed to the folding machine 107. These second shears 112 automatically cut sheets or plates 113 from the new strip 110. The length of the sheets 113 measured in the direction of transport can be optionally selected.
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The plates 113 are, for example, bent to form channel elements and closed by a further folding process in the longitudinal side ; which is first of all still open. The length of these channel elements corresponds to the width of the new strip 110 which is why these channel elements can be produced without any waste ,.' ' .
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resulting. The folds formed by means of the folding machine 107 extend in the longitudinal direction of these channel elements and therefore lead in the desired manner to a reinforcement of the wall surfaces of the channel elements.
The folding device for sheet metal plates which will now be described on the basis of Figures 3 - 17 enables the sheet metal plates to be guided and held securely prior to and during the folding as well as to be pressed towards one another automatically during the actual folding process. In the course of adding further sheet metal plates to plates already joined together to form a strip this can be done without any lengthy return movement of the plates already joined to form a strip.
As shown in Figures 3 and 4, a device 1 for joining the edges of two sheet metal plates by folding comprises a machine frame 2 which is merely indicated schematically in the drawings and on the upper side of which a support surface for two sheet metal plates 4 and 5, respectively, is formed from rectangular profiled carriers 3. As is apparent from Figure 4, the suppor-t surface formed by the profiled carriers 3 consists of two sections which are divided by an intermediate space over the entire length of the machine frame. The free edges of the sheet metal plates 4 and 5 protrude into this intermediate space in such a manner that they overlap one another and, at the same time, are held in vertical, mutually spaced relationship, cf.
Figure 4. The edges or borders of the sheet metal plates 4, 5 extending at right angles to the aforementioned, overlapping edges rest against a stop bar 6 extending at right angles thereto. This stop bar is rigidly connected to the machine . . .
frame 2. In the region of the stop bars 6, clamping means, for example in the form of hydraulically lowerable clamping jaws 7, '' .
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- 6 - 2~37~
are provided on both sides of the intermediate space dividing -the support surface. These clamping jaws are merely indicated schematically in Figures 3 and 4 and with their help the sheet metal plates 4, 5 can be fixed in position at the stop bar 6 and on the support surface.
In the center of the intermediate space formed in the support surface for the sheet metal plates 4, 5, cf. Figure 4, a relatively powerful double-T carrier 8 extends in the lower part of the machine frame and this carrier is rigidly connected with the machine frame 2. This carrier 8 extends over the entire length of the machine frame 2 and protrudes beyond this on one or both sides, as is apparent from Figure 3. A carriage 12 is displaceably guided on the carrier 8 in the longitudinal direction of the device 1 with the aid of rollers 9, 11. The carriage 12 is hereby supported with the rollers 9 on the upper side of the carrier 8 while it is guided with the rollers 11 laterally on the central web 8 of this carrier. In the manner shown in the drawing, a gear rack 13 is rigidly connected with the double-T carrier 8 and a pinion 14 rotatably mounted on the carriage 12 engages therein. The carriage also mounts an electric motor 15 which is connected with the pinion 14 via a conventional (reversing) gear which is not illustrated. When the pinion 14 is driven by the motor 15, the carriage 12 runs back and forth on the guideway formed by the carrier 8.
.
A folding head 16 (which will be described later on) is rigidly, but interchangeably, connected with the upper side of the carriage 12. When the folding head 16 is advanced with the carriage 12 in the direction of arrow V (Figure 3), the two free edges of the sheet metal plates 4, 5 are grasped by the folding head and gradually (in a manner still to be described) joined to '' :
,:
, ; . . :' ~ ' ':, ' -. .
:: .
~37 ~
one another by a fold. When the folding head 16 has passedalong the entire length of the free edges of the sheet metal plates 4, 5, these plates, which are now joined to one another by the fold, can be removed from the machine frame, whereupon the carriage 12 with the folding head 16 can be returned to the initial position (illustrated in Figure 3) by a corresponding reversal of its drive.
In the following, the construction and mode of operation of the folding head 16 will be described.
The folding head 16 comprises an inlet end 17 and an outlet end 18 (Figure 3). At the inlet end 17 the free edges of the sheet metal plates 4, 5 to be joined enter the folding head 16, at the outlet end 18 the edges of the sheet metal plates which are now joined by the fold exit from the folding head 16 again.
At the inlet end of the folding head 17, an upper pocket 21 and a lower pocket 22 are arranged to receive the free edges of the sheet metal plates 4 and 5, respectively. The construction of these pockets 21, 22 is best apparent from Figure 7. The pockets are arranged in vertical, mutually spaced relationship and overlap one another. They each comprise two plates 24 and 25, respectively, which are kept spaced from one another by a spacer member 23 and the plates 25 extend so as to be angled downwardly or upwardly so that outwardly widening insert openings are formed for the sheet metal plates 4, 5 which are open towards opposite sides. With the aid of setscrews 26 the overlapping region of the pockets 21, 22 at the folding head 16 can be suitably adjusted.
- 8 - 2~7~
During the folding process the lip edges of the sheet metal plates 4, 5 are slidingly supported on the bottoms of the pockets formed by the spacer members 23. Pocket bottom and lip edge hereby extend parallel to the advancing direction V of the folding head 16.
Several preforming rollers are rotatably arranged in pairs on the folding head 16 behind the pockets 21, 22 in the advancing direction V. These pairs of rollers each receive between them the edge of a sheet metal plate 4 or 5 and deform this during movement of the folding head 16. As best shown in Figures 5 and 6, two pairs of preforming rollers 31, 32 are arranged at the relevant section of the folding head 16 and these are associated with the sheet metal plates 4 and 5, respectively. The axes of rotation D of these pairs of rollers 31, 32 are located in horizontal planes; they do not, however, extend at right angles to the advancing direction V but are inclined thereto at a small angle a of, for example, 1 to 6, preferably 2 to 4 (Figure 6).
The axes of rotation D of the pairs of preforming rollers are also inclined at this small angle towards the bottom of the pockets 21, 22. Due to this inclined positioning of the axes of rotation D of the pairs of preforming rollers, a component of movement directed towards the bottom of the pockets 21, 22 is imparted to the sheet metal plates 3, 4 during the forward movement of the folding head 16, as soon as they are grasped by the rollers of the respective pairs, and this component of movement causes the edges of the sheet metal plates to be securely supported on the bottom of the pockets so that the lip edges take up a constant position essential for the formation of a firm and precise fold. Without such a component of movement the lip edges could become detached from the bottom of the pockets and this would impair the quality of the fold formed.
.:
,.. .. . .. . . . . . . . ..
... . . . . ~ . . ~.
:- . ~ . . ~ : . -' .
, 9 2~3~ ~
The profile of the pairs of preforming rollers 31, 32 is apparent from Figures 8 and 9. These figures also illustrate the respective edge profile of the sheet metal plates 4, 5 produced by the relevant pairs of rollers, and for the sake of clarity away from the pairs of rollers. It can be seen that due to the profiling of the pairs of rollers 31, 32, trough-like guide channels 35 and 36 are formed in the sheet metal plates 4 and 5, respectively, and by a corresponding bead 33 or a corresponding recess or groove 34 in the rollers at the edge of the sheet metal plates 4, 5. Correspondingly profiled forming rollers, which follow the pairs of preforming rollers 31, 32, engage in these guide channels 35, 36 such that the sheet metal plates 4, 5 are hereby held in an exactly defined, lateral spaced relationship relative to one another.
As shown, furthermore, in Figures 5 and 6, the pairs of preforming rollers 31, 32 are followed by pairs of forming rollers 37, 38 which are also rotatably mounted on the folding head 16 and the profile of which is apparent from Figures 10 and 11. In particular, these figures also show the design of these pairs of rollers 37, 38 with corresponding beads 39 or grooves 41, which positively engage with the guide channels 35, 36 of the sheet metal plates 4, 5 mentioned on the basis of Figures 8 and 9 and exactly position these sheet metal plates as the folding head runs past. Figures 10 and 11 again illustrate the profile at the edges of the sheet metal plates which is produced by the pairs of forming rollers 37, 38.
Following the section of the folding head 16 bearing the pairs of rollers 31, 32, 37, 38 is an additional section 42 (Figures 5 and 6) which includes guideways 43, 44, by which the sheet metal plates 4, 5 initially kept at a vertical distance from one , . , , : :
.- ' , lo - ~ 7 ~ ~
another are brought together as the folding head 16 continues to move forward. Figures 12 and 13 show sectional views of these guideways at the beginning and end, respectively, of this folding head section 42. In Figure 12, the two sheet metal plates 4 and 5 are still spaced as predetermined by the pockets 21, 22 and the pairs of forming rollers 37, 38, respectively.
In Figure 13, the edges of the sheet metal plates 4, 5 are, in contrast, considerably closer to one another.
In the region of the guideways 43, 44, guide members 45 and 46, respectively, are securely arranged in addition at the folding head section 42 and protrude with their free edge regions into the guideways 43, 44. Bent edge sections of the sheet metal plates 4, 5 are slidingly supported at the free edge regions of the guide members 45, 46 so that the two sheet metal plates 4, 5 are hereby held in proper, lateral spaced relationship to one another even as the section 42 passes through.
The folding head section 42 is followed by an additional section 47 which is illustrated in the respective cross-sectional views in Figures 12 to 15.
As shown in Figure 14, the edges of the sheet metal plates 4, 5 brought together by the guide members 45, 46 in accordance with Figure 13 reach in the folding head section 47 into profiled grooves 48, 49, in which the edges of the sheet metal plates continue to be deformed and brought closer together during forward movement of the folding head 16. In this case, shaping is carried out not with the aid of rolling but with the aid of sliding folding elements ("sliding shoes"). The shape and arrangement of the deformed edges of the two sheet metal plates is also illustrated in Figure 14, and outside the profiled grooves 48, 4g for the sake of better clarity.
:' , ' -:
: ~ ~ . .:
-. . ; . ..
.
.
- 11 - 2~7~
Figure 15 shows the gradual change in shape of the profiled grooves 48, 49, which takes place during the transition from Figure 14 to Figure 15. As well as the deformation and arrangement of the edges of the sheet metal plates now reached.
, Another two pairs of forming rollers 51, 52 are arranged at -the folding head section 47 behind the profiled grooves 48, 49 and their cross-sectional profile is illustrated in Figures 16 and 17 together with the sheet metal edges which are now completely folded together. The two pairs of forming rollers 51, 52 comprise a lower roller 53 having a circular-cylindrical casing, on which an upper roller 54 having two lateral beads 56, 57 enclosing the fold 55 is supported. Each fold 55 is finally pressed together between the two rollers 53, 54, whereby the trough-like guide channels 35, 36, which are formed previously and have already been described, are flattened out again completely once a preliminary flattening has already taken place in the profiled grooves 48, 49 (cf. Figure 15). -:~
In Figure 4, it is assumed that the folding head 16 has already been moved forward out of its initial position illustrated in Figure 3 to such an extent that the pockets 21, 22 are at least partially located in the intermediate space between the receiving surfaces for the sheet metal plates above the double-T
carrier 8. This means that the two sheet metal plates 4, 5 can be inserted from both sides into the pockets 21, 22 prior to being clamped by the clamping jaws 7 and this gives them their mutually overlapping position in vertical, mutually spaced relationship. In the preferred embodiment of the device as described, a spreader means 60 is provided at the inlet side 17. This spreader means spreads apart the sheet metal plates 4, 5, which are first of all arranged on the support surface in the . .
., - 12 - 20~3~19 same plane and already overlap with their edges, and automatically gives them the required vertical spacing when the folding head 16 is moved forward in the advancing direction V
ou-t of the initial position illustrated in Figure 3. The spreader means 60 comprises, as shown in Figures 3, 5, 6 and 7, spreading members 61, 62 protruding from the inlet side 17 and having inclined faces 63 and 64, respectively, directed at an angle to the sheet metal plates 4, 5. When the folding head 16 is moved forward out of the initial position illustrated in Figure 3, the spreading members 61, 62 engage with their upwardly or downwardly directed inclined faces 63, 64 on the edges of the sheet metal plates 4, 5 which are already firmly clamped on the support surface. In this respect, the edge of the sheet metal plate 4 is lifted by the spreading member 61 and introduced into the pocket 21 and the edge of the sheet metal plate 5 is lowered by the spreading member 62 and introduced into the pocket 22.
.
As already stated, the folding head 16 of the preferred embodiment is arranged on the carriage 12 so as to be interchangeable. This means that the device can easily be changed over to other folding shapes, for example also depending --on different sheet metal thicknesses, by mounting on the carriage the folding head required each time.
It is, in principle, possible to replace the folding elements formed by rotatable forming rollers and described in the aforesaid by sliding shoes stationarily provided on the folding head or folding block. On the other hand, sliding shoes, which are described in the aforesaid on the basis of the profiled grooves 48, 49, can, if necessary, also be replaced by forming rollers.
' ,, - ~
, .~ ., .: . .~ .. ..
- ~ ; :" :.. ..
- 13 - 2~37~9 The essential advantage of the inven-tion is to be seen in the fact that the sheet metal plates to be folded together remain exactly positioned relative to one another during the folding process and this, finally, facilitates an excellent folding of the two sheet metal plates 4, 5. In the first place, the inclined axes of rotation of the pairs of preforming rollers 31, 32 bring about the exact positioning of the sheet metal plates, which causes a component of movement directed towards the bottom of the pockets 21, 22 to be imparted to the sheet metal plates from the beginning. If necessary, the axes of rotation of subse~uent pairs of rollers, e.g. the pairs of rollers 37, 38, could also be inclined in the specified manner.
In addition, the exact, lateral positioning of the sheet metal plates 4, 5 relative to one another during folding is .
contributed to by the fact that the edges of the sheet metal plates are automatically guided by the cross-sectional profiles :
as mentioned (beads 33, 39 and grooves 34, 41) of the pairs of rollers 31, 32, 37 and 38. Such an automatic guidance which serves to exactly position the sheet metal plates is also effected by the guide members 45, 46 in the guideways 43, 44 before the edges of the sheet metal plates finally come together to form the fold 55 in the profiled grooves 48, 49 and between the pairs of rollers 51, 52.
However, essential for forming an exact fold is also the inventive clamping of the sheet metal plates 4, 5 in the region of their front edges, which extend at right angles to the edges to be folded together, at the stop bars 6 with the aid of the clamping means 7 and the fact that the folding head 16 moves away from this clamped front edge of the sheet metal panels 4, 5 during formation of the fold 55. This means that stresses can, ': . : , - 14 - 2~37~
;
if necessary, be compensated towards the rearward end of the sheet metal plates and a certain relative expansion of the sheet metal plates can take place which also has a favourable effect on the quality of the fold. Such a favourable effect would not occur if the sheet metal plates were to be clamped at their rear edge regions and the folding head were to move towards this clamped edge during folding.
The device comprising a forwardly moving folding head 16 is of advantage in comparison with a folding block mounted stationarily on the machine frame because in the case of stationary sheet metal panels and a moving folding head additional sheet metal plates can be added by folding without any lengthy return movements of the sheet metal plates which are joined together being necessary.
. . .
.
,
Claims (17)
1. Process for making a plate, in particular of galvanized sheet metal, from a strip, in particular for producing thin-walled channel. elements, characterized in that pieces (105) of identical length are cut from a strip (103) at right angles to the two longitudinal axes, that the longitudinal sides of these pieces (105) are joined to one another and that the plates (113) are cut from the new strip (110) formed from the cut pieces (105).
2. Process as defined in claim 1, characterized in that the pieces (105) are joined to one another each time by a fold (109).
3. Process as defined in claim 1 or 2, characterized in that the strip (103) is withdrawn from a roll (102), in particular a roll of commercial size.
4. Device for implementing the process according to claim 1, characterized by a) a first cutting device (104) for the cutting of pieces (105) of identical length from a strip (103) supplied to this cutting device comprising a means for adjusting the piece length, b) a first transport device (106) for transporting the cut pieces (105) one after the other transversely to the direction of transport of the strip (103), c) a joining device (107), the pieces (105) being supplied thereto by the first transport device (106), said joining device joining these pieces (105) to one another along their facing edge zones, d) a second transport device (111) for transporting the new strip (110) formed from the pieces (105) to a second cutting device (112) for cutting plates (113) of selectable length from the new strip (11).
5. Device as defined in claim 4, characterized in that the joining device is a folding machine (107).
6. Device as defined in claim 4 or 5, characterized in that the two cutting devices are shears (104, 112).
7. Device as defined in any of claims 4 to 6, characterized in that a stand (101) for receiving at least one roll (102) is arranged in front of the first cutting device (104), the strip (103) being automatically fed to the first cutting device (104) from said roll.
8. Device, in particular as defined in claim 5, for joining the edges of two sheet metal plates by folding comprising a stationary machine frame, two pockets for receiving and guiding the edges to be joined, said pockets partially overlapping one another, being arranged in mutually spaced relationship and accessible from opposite sides, the lip edges of the sheet metal plates being slidingly supported on the bottom of the pockets, and comprising rotatably mounted preforming rollers arranged behind the pockets for preforming the edges as well as folding elements arranged thereafter for folding the edges, characterized in that the preforming rollers (31, 32) and the folding elements (37, 38, 43, 44, 48, 49, 51, 52) are arranged at a folding head (16) displaceable relative to the stationary machine frame (2) and to the two sheet metal plates (4, 5) held on this frame (2), and that the axes of rotation (D) of the preforming rollers (31, 32) are inclined at an angle towards the bottom of the pockets (21, 22) and impress on the sheet metal plates (4, 5) a component of movement directed towards the bottom of the pockets (21, 22).
9. Device as defined in claim 8, characterized in that the folding head (16) is interchangeably arranged on a carriage (12) guided on the machine frame (2) for forming different folds and processing different sheet metal thicknesses.
10. Device as defined in claim 8, characterized in that the region of overlap of the pockets (21, 22) is adjustable.
11. Device as defined in claim 8, characterized in that guideways (43, 44) are provided for bringing together the two sheet metal plates (4, 5) proceeding from the spacing predetermined by the pockets (21, 22).
12. Device as defined in claim 8, characterized in that the preforming rollers (31, 32) have such a profile that they form a trough-like guide channel (35, 36) at the sheet metal edges.
13. Device as defined in claim 11, characterized in that guide members (45, 46) are provided, said members engaging on already preformed edge portions of the sheet metal plates (4, 5) and holding the sheet metal plates in the guideways (43, 44).
14. Device as defined in claim 8, characterized in that the pockets (21, 22) have an outwardly widening insert opening for the sheet metal plates (4, 5).
15. Device as defined in claim 8, characterized in that the two sheet metal plates (4, 5) are supported at edges extending at right angles to the edges to be folded together on a stop (6) of the machine frame (2) and there are clampable by clamping means (7), and that the folding head (16) during folding moves away from the stop (6) and the clamping means (7).
16. Device as defined in claim 8, characterized in that the folding head (16) guided on a guide means (double-T carrier 8) of the machine frame (2) has a motor-driven pinion (14) engaging in a gear rack rigidly arranged on the machine frame (2) and extending parallel to the direction of displacement (V) of the folding head (16).
17. Device as defined in claim 8, characterized in that a spreader means (60) with inclined surfaces (63, 64) is arranged on the folding head (6), said surfaces engaging the sheet metal plates (4, 5) at their edges and automatically bringing them into a predetermined vertically spaced relationship.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3925963.3 | 1989-08-05 | ||
| DE19893925963 DE3925963C1 (en) | 1989-08-05 | 1989-08-05 | Galvanised sheet panels for thin wall ducting - are formed from identical lengths cut from strip and then joined into new strip from which panels are cut |
| DEP4001963.2 | 1990-01-24 | ||
| DE19904001963 DE4001963C1 (en) | 1990-01-24 | 1990-01-24 | Plate making system - has strips with sections of same length cut preferably from band and connected to each other along longitudinal sides |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2063719A1 true CA2063719A1 (en) | 1991-07-25 |
Family
ID=25883752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2063719 Abandoned CA2063719A1 (en) | 1989-08-05 | 1990-07-19 | Process and device for making a plate from a strip |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0485445A1 (en) |
| JP (1) | JPH04507219A (en) |
| CA (1) | CA2063719A1 (en) |
| WO (1) | WO1991001831A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105436332A (en) * | 2015-12-18 | 2016-03-30 | 森特士兴集团股份有限公司 | Horizontal seam connecting and seam locking machine |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4235629C2 (en) * | 1992-10-22 | 1996-01-25 | Peter Knoll | Device for profiling and / or possibly cutting sheet metal |
| ES2318919B1 (en) * | 2005-02-01 | 2010-01-11 | Jose Umbelco, S.L. | METAL BAND SUCCESS TRAIN BY ITS EDGES CONTINUOUSLY. |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2695445A (en) * | 1950-07-20 | 1954-11-30 | Detroit Steel Products Co | Method of screening frames by a continuous process using screening rolls |
| GB1073056A (en) * | 1964-04-17 | 1967-06-21 | Bahco Ab | Method of making rectangular drums of sheet material |
| DE2321623C3 (en) * | 1973-04-28 | 1984-01-19 | FASTI - WERK Carl Aug. Fastenrath, 5632 Wermelskrichen | System for cross-cutting and lengthways cutting of sheet metal |
-
1990
- 1990-07-19 WO PCT/EP1990/001177 patent/WO1991001831A1/en not_active Application Discontinuation
- 1990-07-19 JP JP51084490A patent/JPH04507219A/en active Pending
- 1990-07-19 EP EP19900911664 patent/EP0485445A1/en not_active Withdrawn
- 1990-07-19 CA CA 2063719 patent/CA2063719A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105436332A (en) * | 2015-12-18 | 2016-03-30 | 森特士兴集团股份有限公司 | Horizontal seam connecting and seam locking machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04507219A (en) | 1992-12-17 |
| WO1991001831A1 (en) | 1991-02-21 |
| EP0485445A1 (en) | 1992-05-20 |
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| FZDE | Dead |