EP2801418B1 - Device for connecting sheet metal shells to a housing of a workpiece by means of folds at edges of the sheet metal shells - Google Patents
Device for connecting sheet metal shells to a housing of a workpiece by means of folds at edges of the sheet metal shells Download PDFInfo
- Publication number
- EP2801418B1 EP2801418B1 EP13005005.7A EP13005005A EP2801418B1 EP 2801418 B1 EP2801418 B1 EP 2801418B1 EP 13005005 A EP13005005 A EP 13005005A EP 2801418 B1 EP2801418 B1 EP 2801418B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tool
- sheet metal
- workpiece
- edges
- workpiece holder
- 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.)
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- 239000002184 metal Substances 0.000 title claims description 75
- 238000005452 bending Methods 0.000 claims description 24
- 238000005304 joining Methods 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 description 14
- 230000006835 compression Effects 0.000 description 9
- 238000007906 compression Methods 0.000 description 9
- 238000006073 displacement reaction Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000009966 trimming Methods 0.000 description 4
- 238000004826 seaming Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
-
- 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
-
- 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
Definitions
- the invention relates to a device for connecting sheet metal shells to a housing of a workpiece by means of folding on edges of the sheet metal shells.
- an inner body such as a pipe of a fluid line is surrounded by a housing formed from sheet metal shells.
- the cavity formed between the housing and the inner body is usually filled with an insulating or insulating material.
- For connecting the sheet metal shells are formed at these edges, which are fastened together by a plurality of welds along the edges or positive connection means.
- these joining techniques require expensive production equipment or complex manual operations with several work steps to be performed by means of different tools, which are time-consuming and also involve high costs.
- a device for connecting sheet metal shells to a housing of a workpiece by means of folding at the edges of the sheet metal shells is described.
- the device comprises a tool with a stationary tool lower part and a movable upper part in the direction of this.
- On the lower tool part a workpiece holder is arranged.
- a displaceably mounted workpiece holder is arranged opposite the workpiece holder.
- a device is provided for trimming the sections to be folded at the edges of the sheet metal shells, this device having inclined surfaces.
- the invention has for its object to provide a device for connecting sheet metal shells to a housing of a workpiece by means of folding on edges of the sheet metal shells, by means of which in a common tool, the steps for a rabbet joint are automatically carried out.
- An advantage of the device according to the invention is that the workpiece has to be picked up only once and inserted into the tool and then the complete rabbet joint with all necessary steps in this tool is produced. This achieves precise production with consistent manufacturing quality.
- the means for folding comprises at least one folding jaw.
- This folding jaw is provided in order to carry out the first deformation step of a folded connection, namely the bending over of the protruding edge section by approximately 90 °.
- at least one guide jaw is provided in the device, which is opposite to the folding jaw.
- a folding jaw and a guide jaw are sufficient if the sheet metal shells are connected on one side via sheet metal webs and are collapsible, so that only on the other side is to produce a rabbet joint. With two separate sheet metal shells that are joined together, two or more folding jaws and the corresponding number of guide jaws are provided.
- the inclined surfaces are arranged on slides which can be supplied laterally. These inclined surfaces preferably have an angle of approximately 45 ° to the longitudinal axis of the workpiece holder, wherein the step of trimming is possible both by a movement towards the workpiece holder as well as parallel to its longitudinal axis.
- the workpiece holder and the tool holder are adjustable by means of adjusting means relative to the upper tool or tool lower part.
- adjusting means may for example be mechanical elements, such as rods and springs or pneumatic adjusting elements or stepper motors.
- locking elements are provided for engagement between the upper tool part and the tool holder.
- blocking elements can be provided between the workpiece holder and the tool lower part.
- locking elements are preferably transversely to the longitudinal axis of the workpiece holder and the workpiece holder movable slide.
- edges supporting elements may be provided which are arranged limitedly displaceable between the guide jaws and the tool holder.
- support stamps may be provided with support surfaces formed on their end faces, which are arranged on the guide jaws. If the adjacent to the recess in the workpiece holder extending edge surfaces are wide enough, they can also serve as a means for supporting the edges of the sheet metal shells.
- a holding-down device is arranged, which is displaceable relative to the workpiece holder and the folding jaw.
- this hold-down can be done as a final step, a folding of the board of the hinge connection by about 90 °.
- the at least two guide jaws are arranged on the lower tool part and between these the workpiece holder is provided.
- the workpiece holder and the workpiece holder are each arranged between a folding jaw and a guide jaw, in which case relative to a connecting plane, the respective arrangements are mirror images.
- the Fig. 1 shows a tool 1, which consists essentially of a tool upper part 2 with attached folding jaws 3, 3 * and a slidably held between these workpiece holder 4 and a stationary tool base 5 with guide jaws 6, 6 * mounted thereon and in a slidably held between them Workpiece holder 7 is.
- the upper tool part 2 with the respective components carried by these is perpendicular to a plane E movable, ie lowered in the direction of the lower tool part 5.
- a workpiece to be manufactured 10 inserted into the opened tool becomes according to Fig. 1 a workpiece to be manufactured 10 inserted.
- This workpiece 10 comprises an inner tube 8 and a housing 9, wherein between the tube 8 and the housing 9, a cavity 11 is formed, which may for example be filled with an insulating or Dämmmaterial.
- the housing 9 consists of two sheet metal shells 12 and 13, which have flared edges to which the sheet metal shells 12, 13 abut each other.
- the workpiece 10 is located in a formed on the upper end face of the workpiece holder 7 recess 14. About the workpiece 10 are located at a sufficient distance two hold-down 15, 15 *, which are guided between the folding jaws 3, 3 * and the workpiece holder 4. The distance 16 is the distance of the folding jaws 3, 3 * to each other.
- the workpiece holder 4 and the workpiece holder 7 have a common longitudinal axis L.
- the workpiece holder 7 communicates with its lower end 7 'in interaction with a guided through the tool lower part 5 rod 22 which is supported with its other end on a compression spring 23.
- the lower end of the support elements 17, 17 * interacts with guided through the tool lower part 5 bolts 24, which are each acted upon by compression springs 25.
- the hold-downs 15, 15 * guided between the workpiece holder 4 and the folding jaws 3, 3 * are provided with an inwardly directed projection 26, 26 * which projects in each case into a groove 27, 27 * on the surface of the workpiece holder 4.
- the length of the groove 27, 27 * in vertical direction is substantially greater than the thickness of the protrusion 26, 26 *, so that a limited displaceability of the workpiece holder 4 is given to the downholders 15, 15 *.
- the side of the workpiece holder 4 facing the tool upper part 2 interacts with a rod 32 projecting through the tool upper part 2, wherein the other end of the rod 32 is acted on by a compression spring 33.
- the workpiece holder 4 At the end of the workpiece holder 4, which faces the workpiece 10, the workpiece holder 4 has a recess 28 whose contour corresponds to the sheet metal shell 12.
- 3 * are at the end, which is located on the upper tool part 2, slide 29, 29 * arranged in the in Fig. 1 shown outer layer completely outside the distance 16.
- the sliders 29, 29 * At the inner end, the sliders 29, 29 * have a projection 31, 31 * formed by a shoulder 30, 30 *.
- Fig. 1 results in the necessary steps for connecting the sheet metal shells 12, 13 on the basis of FIGS. 2 to 5 described in more detail.
- the tool upper part 2 is first lowered with the components carried by these in the direction of the tool lower part 5, so that the end face of the hold-downs 15, 15 * comes to rest on the edges of the sheet metal shell 12, and then the workpiece holder 4 encloses the sheet metal shell and is also supported on the sheet metal edges.
- the upper tool part is moved downward, whereby a displacement of the workpiece holder 4 and the hold-down 15, 15 * takes place until they come to rest on the upper tool part 2.
- the workpiece holder 4 is moved against the sheet metal shell 12, so that it is received in the recess 28.
- the workpiece holder 4 and the workpiece holder 7 at the connection plane E face .. Since the force of the spring 33 is stronger than that of the springs 23, 25, the workpiece holder 7 is moved in the direction of the lower tool part 5 on further lowering of the upper tool part , so that the edges of the sheet metal shell 13 come to rest on the end faces of the support elements 17, 17 *.
- the slides 29, 29 * protrude so far into the distance 16 that they are brought into contact with the upper end faces of the workpiece holder 4 and hold-down 15, 15 * and thus block a longitudinal displacement in the folding jaws 3,3 *.
- These spacers 37, 37 * are in the distance between folding jaws 3, 3 * and guide jaws 6, 6 * in the direction of the workpiece holder movable.
- it is necessary that the folding jaws 3, 3 * have a distance to the spacers 37, 37 *, which is sufficient to allow a downward movement of the upper tool part 2.
- slides 34, 34 * each have an inclined surface 35, 35 * at an angle of approximately 45 ° to the longitudinal axis of the slide 34, 34 * up.
- the edges of the sheet metal shell 12 were angled downward, the inclined surfaces 35, 35 * extend away from the workpiece holder 7 upwards.
- the Fig. 3 shows the so-called trimming, wherein the tool upper part 2 is lowered and thus the inclined surfaces 35, 35 * exert a force on the angled portions of the edges and bend them in the direction of the workpiece holder 7 around the edges of the sheet metal shell 13 until it is at an angle of take about 45 ° to the longitudinal axis of the tool holder 7.
- the edges of the sheet metal shell 12 are supported on their upper side by means of the hold-downs 15, 15 *.
- the upper die 2 is moved down so that the folding jaws. 3 3 * again surround the edges of the sheet metal shells like this Fig. 4 is apparent.
- the tool upper part 2 is moved downwards so far that the end faces of the support elements 17, 17 * strike the inwardly bent portion of the edges of the sheet metal shell 12 and close the fold by a residual movement in this direction.
- the tool 1 can be opened, wherein the workpiece 10 is located on the workpiece holder 7 and the edges formed by the folding of the sheet metal shells project laterally.
- the rims of the seam joints can be provided with welding points, which are produced for example with a welding tongs.
- a tool 1 which consists essentially of a tool upper part 2 and held there bending jaws 43, 43 * and a slidably held between these workpiece holder 44 and a fixed tool lower part 5 with attached guide jaws 46, 46 * and a slidably held between these workpiece holder 47th consists.
- the folding jaws 43, 43 * are adjacent to the upper tool part 2 slide 39, 39 * arranged in the in Fig. 6 shown outer position outside a distance 48, which is formed between the folding jaws 43, 43 *.
- the workpiece holder 44 has at its end directed to the workpiece holder 47 a recess 40, in addition to the lateral hold-down surfaces 41 are formed.
- the tool upper part 2 facing the end of the workpiece holder 44 is in communication with the rod 32, wherein the other end of the rod 32 is acted upon by the compression spring 33.
- the lateral edges next to the recess 42 are very narrow, so that an exact positioning of the sheet metal shells 12, 13, which form the housing, is hardly possible.
- the workpiece holder 47 can be lowered for this purpose, so that the support surfaces 50, 50 * are at the same height as the edges of the recess 42, so that bearing surfaces for the edges of the sheet metal shell 13 are present.
- the first deformation step of the sheet metal shell edges can be performed, which is based on the Fig. 7 is explained.
- the workpiece holder 47 is moved from the workpiece holder 44 to the workpiece base 5 until it rests against this.
- the edges of the sheet metal shells 12, 13 are pressed against each other, and the folding jaws 43, 43 * are pushed so far down that the protruding portions of the edges of the sheet metal shell 12 by means of the bending jaws 43, 43 * at the outer edge of the support stamps 49, 49 * be folded down at least approximately at right angles.
- the rods 22, 32 are each on the outside of the tool base and tool upper part out.
- the tool 1 in the in Fig. 8 shown position first the tool upper part 2 is raised so far that the folding jaws 43, 43 * are located above the sheet metal shell edges. Due to the force of the compression spring 33, the rod 32 holds the workpiece holder 44 in contact with the workpiece 10. The slides 39, 39 * are in Moved towards the rod 32 and block so a relative movement of the workpiece holder. The workpiece holder 47 follows this upward movement due to the force of the compression spring 23. Since the workpiece 10 is in a higher position than the support surfaces 50, 50 * a distance is formed into which the spacers 37, 37 * held slide 34, 34th * be indented from the side.
- the spacers 37, 37 * are slidably guided on the guide jaws 46, 46 * and fit in the distance between folding jaws 43, 43 * and guide jaws 46, 46 *. Since the slide 34 are provided at an angle of approximately 45 ° to the longitudinal axis of the slider 34 inclined inclined surfaces 35, 35 *, as in Fig. 3 If this is the case, the second deformation step of the sheet-metal shell edges, referred to as dressing, takes place, namely the bending of the sections folded down by 90 ° by approximately 45 ° to the workpiece holder 47. The deformation takes place by the lateral movement of the spacers with the slides 34, 34 * in the direction of the workpiece holder 47.
- the upper tool part 2 is moved downward, so that the workpiece holder 44 the Workpiece 10 and the workpiece holder 47 presses down until the workpiece holder rests against the lower tool part 5.
- the support surfaces 50, 50 * of the support punch 49, 49 * reach the inwardly bent portion of the edges of the sheet metal shell 12 and by a residual movement of the upper tool part 2 down the fold is completely closed.
- the folding jaws 43, 43 * again surround the edges of the sheet metal shells, as is the case Fig. 9 is apparent.
- the tool is opened, as in Fig. 10 is shown, wherein the upper tool part 2 is in the highest position. Since the edges of the seaming connections protrude laterally beyond the width of the workpiece holder 47, further operations for securing the seamed connections can be carried out in this position, for example the attachment of spot welds or the angling or Laying the board at the seam connection by means of a bending tool. The accessibility of the board formed at the edges of the sheet is certainly given.
- the Fig. 11 shows an embodiment of the tool 1, which is intended to on the different sides of the housing 9 of the workpiece 10 at the edges of the sheet metal shells 12, 13 on one side of an upwardly shaped seam connection and on the other side to a downwardly shaped seam connection produce.
- a folding jaw 53 * with a slider 51 is arranged on the upper tool part 2 on the right side of the workpiece holder 54, whereas on the left side of the workpiece holder 54, a guide jaw 56 is provided with a support ram 58.
- the workpiece holder 54 is asymmetrical with respect to the central longitudinal axis M, wherein on the right side next to a recess 52, a hold-down surface 59 are provided and formed on the left side, a sharp edge.
- a workpiece holder 57 is arranged, which is formed in mirror image to the workpiece holder 54, with respect to the length but shorter.
- the workpiece holder 57 is provided with a recess 55 in which the workpiece 10 is received.
- the workpiece holder 54 and workpiece holder 57 are each supported by spring-loaded rods 60.
- the Fig. 12 shows an embodiment of the tool 1, in which on the tool upper part 2 on the left side of a folding jaw 43 and on the right side a guide jaw 46 * are arranged. Accordingly, these are attached to the lower tool part 5 folding jaw 43 * and guide jaw 46 opposite. Between the bending jaw 43 and the guide jaw 46 * a workpiece holder 64 is displaceably arranged, which is formed asymmetrically with respect to the longitudinal axis L. In recesses 61, 62 of the folding jaw 43 and guide jaw 46 * slide 63 are arranged, whose function is that the slide 39, 39 * in Fig. 8 equivalent.
- a workpiece holder 67 is slidably disposed, which is also asymmetric with respect to the longitudinal axis L.
- a spacer 37, 37 * with a firmly recorded therein slide 34, 34 * shown which are moved for the purpose of bending the sheet metal section by 45 ° to the workpiece 10 out. Since the sheet metal edge has been deformed by 90 ° downwards by the bending jaw 43, the slide 34 has an upwardly extending inclined surface 35, while the slide 34 * has a downwardly sloping surface 35 *, since the bending jaw 43 * the sheet edge by 90 ° deformed upward.
- the folding jaw 43 * and guide jaw 46 have recesses 61, 62 with sliders 63 arranged therein.
- the operation of this tool 1 corresponds to that, as they to the FIGS. 6 to 10 is described, with the only difference being that according to the tool Fig. 12 mirror-inverted working steps are carried out on the edges located on both sides, ie on the left side a fold is produced downwards and on the right side a fold upwards.
- pressure springs are shown as adjusting means for the rods and bolts.
- other adjusting means may be provided, in particular pneumatic cylinders, servomotors or the like.
- the tool can for example be installed in a press, which serves as a drive of the tool for the lifting movement.
- a device such as a pneumatic or hydraulic cylinder.
- a tool 1 is shown, which consists essentially of the upper tool part 2 and held there bending jaws 3 *, 43 and a slidably held between these workpiece holder 64 and the lower tool part 5 with attached guide jaws 46, 46 * and the slidably held between them Workpiece holder 47 is.
- the workpiece holder 64 has a recess 63.
- the lower tool part 5 with the parts carried by this corresponds to the embodiment in Fig. 6 , For this reason, the reference numerals for the same parts agree with those of Fig. 6 match.
- the folding jaw 3 * shown on the right side corresponds to that in FIG Fig.
- a hold-down 15 * is arranged between the bending jaw 3 * and the workpiece holder 64 .
- This hold-down 15 * is limited relative to the workpiece holder 64 slidably, as to the Fig. 1 is described.
- the slider 29 * is arranged, which is designed as well as in Fig. 1 and also fulfills the same function.
- the one on the left in Fig. 13 shown Abkantbacke 43 with the slider 39 disposed therein corresponds exactly to the embodiment in Fig. 6 , In the in Fig. 13 shown relative position of the upper tool part 2 to the lower tool part 5, the distance between the workpiece holder 64 and the workpiece holder 47 is large enough that a workpiece 10 can be inserted into the recess 42 at the top of the workpiece holder 47.
- the Fig. 14 shows an enlarged view of the detail XIV in Fig. 13 ,
- the workpiece 10 which includes an inner tube 8 and a housing 9. Between the tube 8 and the housing 9, a cavity 11 is formed, which may for example be filled with an insulating or insulating material.
- the housing 9 consists of two sheet metal shells 12, 13 which have outwardly flanged edges 61, 62, on which the sheet metal shells 12, 13 abut each other. In the embodiment of Fig. 14 However, it is also possible to perform both edges 61, 62 in the same width.
- the first deformation step can be performed, which is based on the Fig. 15 is explained.
- the edges 61, 62 see. Fig.
- the Fig. 16 shows the upper tool part 2 in a raised position and also the workpiece holder 47 has been returned by the compression spring 23 to the starting position. At the edges 61 of the sheet metal shell 12, the folded portions can be seen.
- the sliders 29 *, 39 are slid toward the rod 32, thus blocking relative movement of the workpiece holder 64. Spacers 37, 37 * with slides 34, 34 * mounted therein are engaged from the side.
- the tool upper part 2 is lowered again until the folding jaws 3 *, 43 are supported on the spacers 37, 37 * and the workpiece holder 64 with the hold-down device 15 * lie on the edges of the sheet metal shell 12.
- the slide 34, 34 * which are inclined at an angle of approximately 45 ° to the longitudinal axis of the slide inclined surfaces 35, 35 *, the trimming of the edges of the sheet metal shell 12 takes place as a second deformation step, namely by a further 45 ° to the workpiece holder 47th out.
- the upper tool part 2 is slightly raised, so that the spacers 37, 37 * can be moved laterally outwards with the slides again.
- the slides 29 * and 39 are again moved away from the rod 32.
- the tool upper part 2 is moved down, as in Fig. 18 is shown.
- the workpiece holder 64 presses the workpiece 10 and the workpiece holder 47 down until the workpiece holder rests on the lower tool part 5.
- the support surfaces 50, 50 * of the support punch 49, 49 * reach the inwardly bent portion of the edges of the sheet metal shell 12 and by a residual movement of the upper tool part 2 down the fold is completely closed.
- a folding of the board of the seaming done.
- a slider 65 is pushed between the underside of the workpiece holder 47 and the lower tool part 5, so that no relative movement between the guide jaws 46, 46 * and the workpiece holder 47 takes place.
- the slide 29 * arranged in the folding jaw 3 * is displaced inwards, so that the shoulder 30 * engages behind the hold-down device 15 *.
- the upper tool part 2 is moved down, whereby the hold-down 15 * flips the board of the right fold, in the present example by 90 °.
- Fig. 13 to 19 only a hold-down 15 * is shown. However, it is also possible to arrange downholders on the right and left, so that a folding of the board of the folds on both sides is possible. In this case, all parts carried by the tool upper part 2 are formed in mirror image to the longitudinal axis L of the workpiece holder 64.
- a significant advantage of the embodiment according to Fig. 13 to 19 is to be seen in that a combination of the simple execution, as in Fig. 6 is shown with the possibility of turning over the board of a fold or both folds is created.
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Description
Die Erfindung bezieht sich auf eine Vorrichtung zum Verbinden von Blechschalen zu einem Gehäuse eines Werkstücks mittels Falzen an Rändern der Blechschalen.The invention relates to a device for connecting sheet metal shells to a housing of a workpiece by means of folding on edges of the sheet metal shells.
Auf verschiedenen Gebieten der Technik werden Werkstücke eingesetzt, bei denen ein innerer Körper, wie beispielsweise ein Rohr einer Fluidleitung von einem aus Blechschalen gebildeten Gehäuse umgeben ist. Der zwischen dem Gehäuse und dem inneren Körper gebildete Hohlraum ist meistens mit einem Dämm- oder Isoliermaterial gefüllt. Zur Verbindung der Blechschalen sind an diesen Ränder ausgebildet, die durch eine Vielzahl von Schweißpunkten entlang der Ränder oder formschlüssige Verbindungsmittel miteinander befestigt sind. Diese Verbindungstechniken erfordern je nach Art teuere Fertigungseinrichtungen oder aufwändige manuelle Tätigkeiten mit mehreren mittels verschiedener Werkzeuge durchzuführenden Arbeitsschritten, die zeitintensiv und ebenfalls mit hohen Kosten behaftet sind.In various fields of technology workpieces are used in which an inner body, such as a pipe of a fluid line is surrounded by a housing formed from sheet metal shells. The cavity formed between the housing and the inner body is usually filled with an insulating or insulating material. For connecting the sheet metal shells are formed at these edges, which are fastened together by a plurality of welds along the edges or positive connection means. Depending on the type, these joining techniques require expensive production equipment or complex manual operations with several work steps to be performed by means of different tools, which are time-consuming and also involve high costs.
In
Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zum Verbinden von Blechschalen zu einem Gehäuse eines Werkstücks mittels Falzen an Rändern der Blechschalen zu schaffen, mittels der in einem gemeinsamen Werkzeug die Arbeitsschritte für eine Falzverbindung automatisch durchführbar sind.The invention has for its object to provide a device for connecting sheet metal shells to a housing of a workpiece by means of folding on edges of the sheet metal shells, by means of which in a common tool, the steps for a rabbet joint are automatically carried out.
Diese Aufgabe wird durch eine Vorrichtung zum Verbinden von Blechschalen zu einem Gehäuse eines Werkstücks mittels Falzen an Rändern der Blechschalen mit den Merkmalen des Anspruchs 1 gelöst.This object is achieved by a device for connecting sheet metal shells to a housing of a workpiece by means of folding on edges of the sheet metal shells with the features of
Ein Vorteil der erfindungsgemäßen Vorrichtung besteht darin, dass das Werkstück lediglich einmal aufgenommen und in das Werkzeug eingelegt werden muss und dann die vollständige Falzverbindung mit allen dafür erforderlichen Schritten in diesem Werkzeug hergestellt wird. Dadurch wird eine präzise Fertigung mit gleichbleibender Fertigungsqualität erreicht.An advantage of the device according to the invention is that the workpiece has to be picked up only once and inserted into the tool and then the complete rabbet joint with all necessary steps in this tool is produced. This achieves precise production with consistent manufacturing quality.
In weiterer Ausgestaltung der Vorrichtung ist vorgesehen, dass die Einrichtung zum Abkanten mindestens eine Abkantbacke umfasst. Diese Abkantbacke ist vorgesehen, um den ersten Verformungsschritt einer Falzverbindung, nämlich das Umbiegen des überstehenden Randabschnitts um ca. 90 °, auszuführen. Außerdem ist in der Vorrichtung mindestens eine Führungsbacke vorgesehen, die der Abkantbacke gegenüberliegt. Eine Abkantbacke und eine Führungsbacke reichen aus, wenn die Blechschalen auf einer Seite über Blechstege verbunden sind und zusammenklappbar sind, so dass nur auf der anderen Seite eine Falzverbindung herzustellen ist. Bei zwei separaten Blechschalen, die zusammengefügt werden, sind zwei oder mehr Abkantbacken und die entsprechende Anzahl Führungsbacken vorgesehen. Für den zweiten Verformungsschritt zur Herstellung einer Falzverbindung, nämlich das sogenannte Zurichten, ist vorgesehen, dass die Schrägflächen an seitlich zuführbaren Schiebern angeordnet sind. Diese Schrägflächen weisen vorzugsweise einen Winkel von ca. 45 ° zur Längsachse der Werkstückaufnahme auf, wobei der Arbeitsschritt des Zurichtens sowohl durch eine Bewegung zum Werkstückhalter hin als auch parallel zu dessen Längsachse möglich ist.In a further embodiment of the device is provided that the means for folding comprises at least one folding jaw. This folding jaw is provided in order to carry out the first deformation step of a folded connection, namely the bending over of the protruding edge section by approximately 90 °. In addition, at least one guide jaw is provided in the device, which is opposite to the folding jaw. A folding jaw and a guide jaw are sufficient if the sheet metal shells are connected on one side via sheet metal webs and are collapsible, so that only on the other side is to produce a rabbet joint. With two separate sheet metal shells that are joined together, two or more folding jaws and the corresponding number of guide jaws are provided. For the second deformation step for producing a folded connection, namely the so-called dressing, it is provided that the inclined surfaces are arranged on slides which can be supplied laterally. These inclined surfaces preferably have an angle of approximately 45 ° to the longitudinal axis of the workpiece holder, wherein the step of trimming is possible both by a movement towards the workpiece holder as well as parallel to its longitudinal axis.
In weiterer Ausgestaltung der Vorrichtung ist vorgesehen, dass der Werkstückhalter und die Werkzeugaufnahme mittels Stellmitteln relativ zum Werkzeugoberteil bzw. Werkzeugunterteil verstellbar sind. Solche Stellmittel können beispielsweise mechanische Elemente, wie Stangen und Federn oder pneumatische Stellelemente oder Schrittmotoren sein. Außerdem ist es zweckmäßig, dass Sperrelemente zum Eingriff zwischen dem Werkzeugoberteil und dem Werkzeughalter vorgesehen sind. Ebenso können Sperrelemente zwischen der Werkstückaufnahme und dem Werkzeugunterteil vorgesehen werden. Solche Sperrelemente sind vorzugsweise quer zur Längsachse des Werkstückhalters bzw. der Werkstückaufnahme bewegliche Schieber.In a further embodiment of the device it is provided that the workpiece holder and the tool holder are adjustable by means of adjusting means relative to the upper tool or tool lower part. Such adjusting means may for example be mechanical elements, such as rods and springs or pneumatic adjusting elements or stepper motors. In addition, it is expedient that locking elements are provided for engagement between the upper tool part and the tool holder. Likewise, blocking elements can be provided between the workpiece holder and the tool lower part. Such locking elements are preferably transversely to the longitudinal axis of the workpiece holder and the workpiece holder movable slide.
Als Einrichtung zum Stützen der Ränder können Stützelemente vorgesehen sein, die begrenzt verschiebbar zwischen den Führungsbacken und dem Werkzeughalter angeordnet sind. Alternativ hierzu können Stützstempel mit an deren Stirnseiten ausgebildeten Stützflächen vorgesehen sein, die auf den Führungsbacken angeordnet sind. Sofern die neben der Vertiefung in der Werkstückaufnahme verlaufenden Randflächen breit genug sind, können diese auch als Einrichtung zum Stützen der Ränder der Blechschalen dienen.As means for supporting the edges supporting elements may be provided which are arranged limitedly displaceable between the guide jaws and the tool holder. Alternatively, support stamps may be provided with support surfaces formed on their end faces, which are arranged on the guide jaws. If the adjacent to the recess in the workpiece holder extending edge surfaces are wide enough, they can also serve as a means for supporting the edges of the sheet metal shells.
Außerdem ist es vorteilhaft, dass zumindest zwischen einer Abkantbacke und dem Werkstückhalter ein Niederhalter angeordnet ist, der relativ zum Werkstückhalter und zur Abkantbacke verschiebbar ist. Mittels diesem Niederhalter kann als letzter Arbeitsschritt ein Umlegen des Bords der Falzverbindung um etwa 90° erfolgen. Selbstverständlich ist es auch möglich, zwischen jeder Abkantbacke und dem Werkstückhalter einen Niederhalter vorzusehen.Moreover, it is advantageous that at least between a folding jaw and the workpiece holder, a holding-down device is arranged, which is displaceable relative to the workpiece holder and the folding jaw. By means of this hold-down can be done as a final step, a folding of the board of the hinge connection by about 90 °. Of course, it is also possible to provide a hold-down device between each folding jaw and the workpiece holder.
Außerdem ist es zweckmäßig, dass die mindestens zwei Führungsbacken auf dem Werkzeugunterteil angeordnet sind und zwischen diesen die Werkstückaufnahme vorgesehen ist. Alternativ hierzu ist es aber auch möglich, dass der Werkstückhalter und die Werkstückaufnahme jeweils zwischen einer Abkantbacke und einer Führungsbacke angeordnet sind, wobei dann bezogen auf eine Verbindungsebene die jeweiligen Anordnungen spiegelbildlich sind. Bei der Fertigung solcher Gehäuse aus Blechschalen an einem Werkstück kann es in manchen Fällen vorteilhaft sein, dass auf einer Seite der Werkstückaufnahme eine Führungsbacke am Werkzeugunterteil und die Abkantbacke am Werkzeugoberteil angeordnet sind und auf der anderen Seite der Werkstückaufnahme die Führungsbacke am Werkzeugoberteil und die Abkantbacke am Werkzeugunterteil angeordnet sind.In addition, it is expedient that the at least two guide jaws are arranged on the lower tool part and between these the workpiece holder is provided. Alternatively, it is also possible that the workpiece holder and the workpiece holder are each arranged between a folding jaw and a guide jaw, in which case relative to a connecting plane, the respective arrangements are mirror images. In the manufacture of such housing from sheet metal shells on a workpiece, it may be advantageous in some cases that on one side of the workpiece holder a guide jaw on the tool base and the folding jaw are arranged on the upper tool and on the other side of the workpiece holder, the guide jaw on the upper tool and the folding jaw on Tool lower part are arranged.
Ausführungsbeispiele der Erfindung sind nachstehend anhand der Zeichnung näher erläutert. In der Zeichnung zeigt:
- Fig. 1
- ein Werkzeug zum Verbinden von Blechschalen zu einem Gehäuse eines Werkstücks mit einem Werkstückhalter und einer Werkstückaufnahme in geöffnetem Zustand,
- Fig. 2
- das Werkzeug in einer Stellung mit einem vollständig abgesenkten Werkzeugoberteil und erster Umformung der Blechschalenränder,
- Fig. 3
- das Werkzeug in einer Position mit zur Werkstückaufnahme bewegten Schiebern und zweiter Umformung der Blechschalenränder mittels der Schieber,
- Fig. 4
- das vollständige Schließen des Falzes mittels Pressung der Blechschalenränder zwischen Niederhaltern und Stützelementen,
- Fig. 5
- das Umlegen des Bords am Falz,
- Fig. 6
- eine Ausführungsvariante des Werkzeugs zum Verbinden von Blechschalen zu einem Gehäuse eines Werkstücks in der Position gemäß
Fig. 1 , - Fig. 7
- das Werkzeug gemäß
Fig.6 in einer Stellung mit einem vollständig abgesenkten Werkzeugoberteil und erster Umformung der Blechschalenränder, - Fig. 8
- das Werkzeug in einer Position mit zur Werkstückaufnahme bewegten Schiebern und zweiter Umformung der Blechschalenränder mittels der Schieber,
- Fig. 9
- das vollständige Schließen des Falzes mittels Pressung der Blechschalenränder zwischen Werkstückhalter und Stützstempel,
- Fig. 10
- das Werkzeug in der geöffneten Position nach dem Herstellen der Falzverbindung,
- Fig. 11
- eine Ausführungsvariante des Werkzeugs gemäß
Fig. 7 , - Fig. 12
- einen Schnitt durch ein Werkzeug zum Falzen von Blechrandabschnitten auf einer Seite nach oben und auf der anderen Seite nach unten,
- Fig. 13
- eine Ausführungsvariante des Werkzeugs zum Verbinden von Blechschalen zu einem Gehäuse eines Werkstücks in der Position gemäß
Fig. 1 oder 6 , - Fig. 14
- eine vergrößerte Darstellung der Einzelheit XIV in
Fig. 13 , - Fig. 15
- das Werkzeug gemäß
Fig. 13 in einer Stellung mit vollständig abgesenktem Werkzeugoberteil, - Fig. 16
- das Werkzeug gemäß
Fig. 13 mit seitlich zugeführten Schiebern für die zweite Umformung, - Fig. 17
- das Werkzeug gemäß
Fig. 16 nach der zweiten Umformung, - Fig. 18
- das vollständige Schließen des Falzes,
- Fig. 19
- das Umlegen eines Bords am Falz.
- Fig. 1
- a tool for connecting sheet metal shells to a housing of a workpiece with a workpiece holder and a workpiece holder in the opened state,
- Fig. 2
- the tool in a position with a fully lowered tool top and first forming the sheet metal shell edges,
- Fig. 3
- the tool in a position with moving to the workpiece holder slides and second deformation of the sheet metal shell edges by means of the slide,
- Fig. 4
- the complete closing of the fold by pressing the sheet metal shell edges between hold-downs and support elements,
- Fig. 5
- the folding of the board at the fold,
- Fig. 6
- an embodiment of the tool for connecting sheet metal shells to a housing of a workpiece in the position according to
Fig. 1 . - Fig. 7
- the tool according to
Figure 6 in a position with a fully lowered tool top and first forming the sheet metal shell edges, - Fig. 8
- the tool in a position with moving to the workpiece holder slides and second deformation of the sheet metal shell edges by means of the slide,
- Fig. 9
- the complete closing of the fold by pressing the sheet metal shell edges between the workpiece holder and the support punch,
- Fig. 10
- the tool in the open position after making the seaming connection,
- Fig. 11
- an embodiment of the tool according to
Fig. 7 . - Fig. 12
- a section through a tool for folding sheet edge portions on one side up and on the other side down,
- Fig. 13
- an embodiment of the tool for connecting sheet metal shells to a housing of a workpiece in the position according to
Fig. 1 or6 . - Fig. 14
- an enlarged view of the detail XIV in
Fig. 13 . - Fig. 15
- the tool according to
Fig. 13 in a position with completely lowered tool upper part, - Fig. 16
- the tool according to
Fig. 13 with laterally supplied slides for the second forming, - Fig. 17
- the tool according to
Fig. 16 after the second transformation, - Fig. 18
- the complete closing of the fold,
- Fig. 19
- the folding of a board at the fold.
Die
In der in
Die zwischen Werkstückhalter 4 und Abkantbacken 3, 3* geführten Niederhalter 15, 15* sind mit einem nach innen gerichteten Vorsprung 26, 26* versehen, der jeweils in eine Nut 27, 27* an der Oberfläche des Werkstückhalters 4 ragt. Die Länge der Nut 27, 27* in vertikaler Richtung ist wesentlich größer, als die Dicke des Vorsprungs 26, 26*, so dass eine begrenzte Verschiebbarkeit des Werkstückhalters 4 zu den Niederhaltern 15, 15* gegeben ist. Die dem Werkzeugoberteil 2 zugewandte Seite des Werkstückhalters 4 steht mit einer durch das Werkzeugoberteil 2 ragenden Stange 32 in Wechselwirkung, wobei das andere Ende der Stange 32 von einer Druckfeder 33 beaufschlagt ist. An dem Ende des Werkstückhalters 4, das dem Werkstück 10 zugewandt ist, weist der Werkstückhalter 4 eine Vertiefung 28 auf, deren Kontur der Blechschale 12 entspricht. In den Abkantbacken 3, 3* sind an dem Ende, das an dem Werkzeugoberteil 2 liegt, Schieber 29, 29* angeordnet, die sich in der in
Nachdem das Werkstück 10 in das Werkzeug 1 eingelegt ist, wie sich dies aus
Das Werkzeugoberteil wird nach unten bewegt, wodurch eine Verschiebung des Werkstückhalters 4 und der Niederhalter 15, 15* erfolgt, bis diese an dem Werkzeugoberteil 2 zur Anlage kommen. Durch weiteres Absenken des Werkzeugoberteils 2 wird der Werkstückhalter 4 gegen die Blechschale 12 bewegt, so dass diese in der Vertiefung 28 aufgenommen wird. Dabei stehen sich der Werkstückhalter 4 und die Werkstückaufnahme 7 an der Verbindungsebene E gegenüber.. Da die Kraft der Feder 33 stärker ist, als die der Federn 23, 25 wird bei weiterem Absenken des Werkzeugoberteils 2 die Werkstückaufnahme 7 in Richtung auf das Werkzeugunterteil 5 bewegt, so dass die Ränder der Blechschale 13 an den Stirnflächen der Stützelemente 17, 17* zur Anlage kommen. Durch weiteren Abwärtshub stützen sich die Stufen 19 der Werkstückaufnahme 7 an den Abschnitten 21, 21* der Stützelemente 17, 17* ab, und sowohl die Stützelemente 17, 17* als auch die Werkstückaufnahme 7 schlagen an dem Werkzeugunterteil 5 an. Letzteres hat zur Folge, dass die Stange 22 und die Bolzen 24 im Werkzeugunterteil 5 verschoben sind, so dass sie auf der Unterseite um ein entsprechendes Maß hervorstehen. Mit weiterer Bewegung des Werkzeugoberteils 2 nach unten werden auch die Abkantbacken 3, 3* so weit nach unten gefahren, dass sie die äußeren Abschnitte der Blechschalenränder der Blechschale 12 am Außenrand der Stützelemente 17, 17* mindestens annährend rechtwinklig nach unten abkanten. Diese Verschiebung bedingt auch eine Verschiebung der Stange 32 im Werkzeugoberteil 2, so dass die Stange 32 an dessen Oberseite hervorsteht, wie dies in
Dann wird das Werkzeug nach einem Zwischenhub in die in
Die
Nachdem die Schieber 34, 34* mit den Distanzstücken 37, 37* wieder seitlich nach außen bewegt worden sind und auch die radialen Schieber 29, 29* wieder außerhalb des Abstands 16 liegen, wird das Werkzeugoberteil 2 nach unten bewegt, so dass die Abkantbacken 3, 3* wieder die Ränder der Blechschalen umgeben, wie dies aus
Sofern gewünscht, kann das Werkzeug 1 geöffnet werden, wobei das Werkstück 10 auf der Werkstückaufnahme 7 liegt und die durch das Falzen der Blechschalen gebildeten Borde seitlich überstehen. In dieser Position können die Borde der Falzverbindungen mit Schweißpunkten versehen werden, die beispielsweise mit einer Schweißzange erzeugt werden.If desired, the
Ausgehend von der Stellung gemäß
In
In der in
Nachdem das Werkstück 10 in die Vertiefung 42 der Werkstückaufnahme 47 eingelegt ist, kann der erste Verformungsschritt der Blechschalenränder ausgeführt werden, was anhand der
Dann wird das Werkzeug 1 in die in
Nachdem die Distanzstücke 37, 37* mit den Schiebern 34, 34* wieder seitlich nach außen bewegt worden sind und auch die Schieber 39, 39* wieder außerhalb des Abstandes 48 liegen, wird das Werkzeugoberteil 2 nach unten bewegt, so dass der Werkstückhalter 44 das Werkstück 10 und die Werkstückaufnahme 47 nach unten drückt, bis die Werkstückaufnahme am Werkzeugunterteil 5 anliegt. Durch weiteres Absenken des Werkzeugoberteils 2 gelangen die Stützflächen 50, 50* der Stützstempel 49, 49* auf den nach innen umgebogenen Abschnitt der Ränder der Blechschale 12 und durch eine restliche Bewegung des Werkzeugoberteil 2 nach unten wird der Falz vollständig geschlossen. Dabei umgeben die Abkantbacken 43, 43* wieder die Ränder der Blechschalen, wie dies aus
Da nun der Falz erzeugt ist, wird das Werkzeug geöffnet, wie dies in
Die
Die
In den beschriebenen Ausführungsbeispielen sind als Stellmittel für die Stangen und Bolzen Druckfedern dargestellt. Selbstverständlich können auch andere Stellmittel vorgesehen werden, insbesondere Pneumatikzylinder, Stellmotoren oder dergleichen. Das Werkzeug kann beispielsweise in eine Presse eingebaut werden, die als Antrieb des Werkzeugs für die Hubbewegung dient. Es ist jedoch auch möglich, das Werkzeug in einer Vorrichtung mit einem Antriebsaggregat, beispielsweise einem Pneumatik- oder Hydraulikzylinder einzusetzen. Weiterhin ist es möglich, das Werkzeug mit einem eigens dafür geschaffenen Rahmen und einem Antrieb zu versehen, so dass diese Kombination eine stets fertig einsetzbare Einheit bildet und das Werkzeug nicht erst in einer Presse oder Arbeitsvorrichtung installiert werden muss.In the described embodiments, pressure springs are shown as adjusting means for the rods and bolts. Of course, other adjusting means may be provided, in particular pneumatic cylinders, servomotors or the like. The tool can for example be installed in a press, which serves as a drive of the tool for the lifting movement. However, it is also possible to use the tool in a device with a drive unit, such as a pneumatic or hydraulic cylinder. Furthermore, it is possible to provide the tool with a specially created frame and a drive, so that this combination forms an always ready-to-use unit and the tool does not have to be installed in a press or working device.
In
Die
Nachdem das Werkstück 10 in die Vertiefung 42 der Werkstückaufnahme 47 eingelegt ist, kann der erste Verformungsschritt ausgeführt werden, was anhand der
Die
Danach wird gemäß
Danach wird das Werkzeugoberteil 2 leicht angehoben, so dass die Distanzstücke 37, 37* mit den Schiebern wieder seitlich nach außen bewegt werden können. Auch die Schieber 29* und 39 sind wieder von der Stange 32 weg bewegt. Danach wird das Werkzeugoberteil 2 nach unten bewegt, wie dies in
Auf der rechten Seite in
In
Claims (15)
- Device for joining sheet metal shells (12, 13) to a housing (9) of a workpiece (10) by means of folds at the edges of the sheet metal shells (12, 13), the device comprising a tool (1) with a stationary tool lower part (5) and a tool upper part (2) movable towards the former, wherein a workpiece receptacle (7, 47, 57) is provided on the tool lower part (5) and wherein a displaceably mounted workholder (4, 44, 54, 64) of the workpiece receptacle (7, 47, 57) is arranged opposite and wherein a device having inclined surfaces (35) is provided for preparing the sections to be folded at the edges of the sheet metal shells (12, 13), characterised in that the workpiece receptacle (7, 47, 57) is displaceable perpendicular to the tool lower part (5) and has at its upper end a recess (14, 42, 52), in which the workpiece (10) is accommodated, and in that furthermore a device for supporting the edges of the sheet metal shells (12, 13) is provided on one side of a joining plane (E) and a device for bending (3, 3*, 43, 43*, 53, 53*) is provided on the other side.
- Device according to claim 1,
characterised in that the device for bending comprises at least one bending jaw (3, 3*, 43, 43*, 53, 53*), preferably two or more bending jaws (3, 3*, 43, 43*, 53, 53*). - Device according to claim 2,
characterised in that for each bending jaw (3, 3*, 43, 43*, 53, 53*) there is provided a guide jaw (6, 6*, 46, 46*, 56, 56*), which is placed opposite the respective bending jaw (3, 3*, 43, 43*, 53, 53*). - Device according to any of claims 1 to 3,
characterised in that the device for preparing comprises sliders (34, 34*), which can be fed in laterally and on which the inclined surfaces (35, 35*) are formed. - Device according to any of claims 1 to 4,
characterised in that the workholder (4, 44, 54) and the tool receptacle (7, 47, 57) are adjustable relative to the tool upper part (2) and/or the tool lower part (5) using adjusting means. - Device according to any of claims 1 to 5,
characterised in that locking elements are provided for engagement between the tool upper part (2) and the workholder (4, 44, 54), the locking elements being preferably designed as sliders (29, 29*, 39, 39*, 51, 51*) movable across or along the workholder or the tool receptacle. - Device according to any of claims 1 to 5,
characterised in that locking elements (36, 36*, 63, 65) are provided for engagement between the workpiece receptacle (7, 47) and the tool lower part (5). - Device according to any of claims 3 to 7,
characterised in that the device for supporting the edges is represented by support elements (17, 17*), which are capable of limited movement between the guide jaws (6, 6*) and the tool holder (7). - Device according to any of claims 3 to 7,
characterised in that the device for supporting the edges is represented by support dies (49, 49*) with supporting surfaces (50, 50*) formed at their end faces. - Device according to any of claims 1 to 7,
characterised in that the device for supporting the edges is represented by the edge surfaces extending adjacent to the recess (14) at the workpiece receptacle (7). - Device according to any of claims 2 to 10,
characterised in that a hold-down device (15*) displaceable relative to the workholder and the bending jaw (3*) is provided at least between one bending jaw (3, 3*) and the workholder (64). - Device according to claim 11,
characterised in that a hold-down device (15, 15*) is provided between each bending jaw (3, 3*) and the workholder (4). - Device according to claim 3,
characterised in that at least two guide jaws (6, 6*, 46, 46*) are provided on the tool lower part (5), and in that the workpiece receptacle (7, 47) is provided between these. - Device according to claim 3,
characterised in that the workholder (54) and the workpiece receptacle (57) are each located between a bending jaw (53, 53*) and a guide jaw (56, 56*). - Device according to any of claims 1 to 10,
characterised in that, on one side of the workpiece receptacle (67), a guide jaw (46) is provided on the tool lower part (5) and the bending jaw (43) is provided on the tool upper part (2) and, on the other side of the workpiece receptacle (67), a guide jaw (46*) is provided on the tool upper part (2) and the bending jaw (43*) is provided on the tool lower part (5).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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EP13005005.7A EP2801418B1 (en) | 2013-05-07 | 2013-10-19 | Device for connecting sheet metal shells to a housing of a workpiece by means of folds at edges of the sheet metal shells |
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Application Number | Priority Date | Filing Date | Title |
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EP13002421 | 2013-05-07 | ||
EP13005005.7A EP2801418B1 (en) | 2013-05-07 | 2013-10-19 | Device for connecting sheet metal shells to a housing of a workpiece by means of folds at edges of the sheet metal shells |
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EP2801418A1 EP2801418A1 (en) | 2014-11-12 |
EP2801418B1 true EP2801418B1 (en) | 2016-01-20 |
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JPS5871421U (en) * | 1981-11-02 | 1983-05-14 | 株式会社土屋製作所 | Crimping device for the edge of a cylindrical body |
JP2000051958A (en) * | 1998-08-07 | 2000-02-22 | Nissan Motor Co Ltd | Hemming work method |
US6446322B1 (en) * | 2000-05-10 | 2002-09-10 | Tenneco Automotive Operating Company Inc. | Method and apparatus for sealing canisters |
US20020157441A1 (en) * | 2001-02-27 | 2002-10-31 | William Patrick | Die hemming assembly and method |
US6467324B2 (en) * | 2001-02-27 | 2002-10-22 | William Patrick | Die hemming assembly and method |
JP2004181498A (en) * | 2002-12-04 | 2004-07-02 | Honda Motor Co Ltd | Hemming die apparatus |
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