• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a press with a transfer device for the gradual transport of workpieces (18 ', 11) in a longitudinal direction from a receiving station through at least one processing station of the press with transport means (4', 1) for the workpieces (18 ', 11), which cyclically and synchronously with the movement of the press in the longitudinal direction as well as for gripping or releasing the workpieces (18 ', 11) in a transverse direction perpendicular thereto at least partially or regionally to and fro, characterized in that the workpieces (18 ', 11) between the processing stations are gripped on both sides with a gripper (5', 5, 6) each, transported in the gripped state in the longitudinal direction to the next processing station and released again in the next processing station, and that at least one of the grippers (5 ', 5) is sprung and designed with an elastic restoring force against the workpiece (18', 11). The invention further relates to the use of such a device for the production of workpieces and to workpieces produced using such a device.
    公开号:CH715796B1
    申请号:CH01590/19
    申请日:2019-12-11
    公开日:2020-07-31
    发明作者:Common Matthias；Graf Urs
    申请人:Adval Tech Holding Ag；
    IPC主号:
    专利说明:

    TECHNICAL AREA
    The present invention relates to a press with transfer device for the gradual transport of workpieces in a longitudinal direction from a receiving station through at least one processing station of the press with means of transport for the workpieces, which are cyclical and synchronous with the movement of the press in the longitudinal direction and for detecting or releasing the workpieces again are moved back and forth in a transverse direction perpendicular thereto. Transfer devices are distinguished from so-called progressive tools in that the part to be formed in the press is initially e.g. from an endless strip e.g. separated by cutting or punching and is then transported independently of the movement of the endless strip and mostly also perpendicular to it through the at least one processing station of the press.
    [0002] The press is usually provided with several processing stations or forming stages connected in series. In the case of progressive tools, on the other hand, the part to be formed is transported from forming stage to forming stage by its own continuous strip from which it originates.
    STATE OF THE ART
    A transfer device of the type mentioned with a pair of transport rods as transport means for the workpieces is e.g. known from EP 0 490 821 A1. There the transport rods are driven by mechanical coupling with moving parts of the press, namely in the longitudinal direction by decreasing the movement of the eccentric shaft of the press via a gear and in the transverse direction by decreasing the movement of the ram of the press by means of control rails, which results in high stroke rates in the area Have 300 cycles per minute. For special applications in the can area, even up to 700 cycles per minute are achieved. The mechanical coupling also means that collisions between the press tool and the means of transport can be largely prevented. The parts to be formed are each gripped by two rigid grippers for transport, transported longitudinally and then released again at the next station for the next processing.
    Basically similar devices are known from EP 0 504 098 A1, EP 0694 350 A1, and WO00 / 20305 A1. The parts to be formed are also gripped by two rigid grippers for transport, transported longitudinally and then released again at the next station for the next processing.
    In addition, transfer devices are known in which the drive of the means of transport is effected via one or more external drives using servomotors, hydraulics, pneumatics, linear motors, etc. and which are signal-synchronized in various ways with the movement of the press ram. Such external drives are usually cheaper and can also be used more flexibly than the aforementioned mechanical couplings, but they cannot be used to achieve such high stroke rates. The limit here is currently 50 - 150 cycles per minute. If a drive fails, there is also a risk of a collision between the press tool and the means of transport, with mostly destructive consequences.
    DISCLOSURE OF THE INVENTION
    It is, inter alia, the object of the present invention to provide an improved press with transfer device in the aforementioned sense, in particular an improved press with transfer device for the gradual transport of workpieces in a longitudinal direction from a receiving station through at least one processing station of the press with means of transport for the Workpieces, which are cyclically and synchronously moved to and fro in a transverse direction perpendicular thereto, at least partially or in areas, to the movement of the press in the longitudinal direction and to grasp or release the workpieces again. The press with transfer device should be improved in particular with regard to gripping the workpieces.
    The means of transport can be rod-shaped, and the grippers can be firmly attached to these rods. Then the means of transport move as a whole both in the longitudinal direction and in the transverse direction, quasi in a rectangular movement. However, the transport means can also be designed in such a way that the grippers are movably attached to such rods, and consequently the rods then only perform longitudinal movements, and the grippers perform a separate transverse movement on these rods. This transverse movement can either be actively controlled, or it can be controlled in that the workpieces are pushed between the grippers. According to the invention, such a device is characterized in that the workpieces are gripped between the processing stations from both sides with a gripper each, transported in the gripped state in the longitudinal direction to the next processing station and released again in the next processing station, and that at least one of the grippers is spring-loaded and is formed with an elastic restoring force against the workpiece.
    Due to the spring-loaded design of the gripper, a much more flexible and reliable process control is possible, and it is still possible to process different materials, including soft materials, in such devices.
    A first preferred embodiment of the proposed invention is characterized in that the suspension of the at least one gripper is formed by an elastic spring element, this spring element is preferably formed by a leaf spring, compressed air, a helical spring, or an elastomer spring.
    Furthermore, it is possible that at least one of the grippers has a gripper carrier, which is mounted exclusively transversely displaceably in the transport means, preferably in a gripper rod, and in this gripper carrier has a slidable gripper pin which is preferably elastically braced against the workpiece, preferably by means of a spring, in particular a helical spring, or by means of compressed air or an elastomer spring, the return preferably being configured to be adjustable. Another preferred embodiment of the proposed device is characterized in that spring-loaded grippers are arranged on both sides of the workpiece. A spring-loaded gripper can only be arranged on one side of the workpiece, and an unsprung gripper on the opposite side.
    The transversal movement of the grippers arranged on opposite sides of the workpiece is then preferably not necessarily controlled mirror-symmetrically with respect to the workpiece position, with the transversal movement being preferably controlled so asymmetrically. As a result, the unsprung gripper does not hit the part, as it only moves up to the part. The spring-loaded gripper moves asymmetrically (later) to position so that the part is not pushed out of position by the spring force. The speed of impact is defined by the shape of the drive curve of the gripper.
    The present invention further relates to a method for the step-by-step production of components, in particular starting from a flat, strip-shaped starting material, preferably made of metal, particularly preferably steel or aluminum, using a device as explained above.
    Such a method is preferably characterized in that, preferably after a first punching step and a subsequent first forming step, the workpiece is gripped at least once from both sides by a pair of grippers and transported to a subsequent processing station.
    Further preferred masses such a method is characterized in that both grippers are spring-loaded, and that the transverse movement of the grippers consists at least partially or exclusively in the fact that the workpieces through the processing tool at this processing station against the spring force of the gripper in this Bracket is inserted.
    Alternatively, such a method is characterized in that only one of the grippers is designed to be sprung, and that the transverse movement of the gripper arranged on opposite sides of the workpiece is not necessarily controlled mirror-symmetrically with respect to the workpiece position, with the transverse movement being preferably controlled so asymmetrically, that the unsprung gripper does not approach the part, but rather moves towards the part, and the spring-loaded gripper moves asymmetrically (later) to position so that the part is not pushed out of position by the spring force. The speed of impact is defined by the shape of the drive curve of the gripper.
    Last but not least, the present invention relates to workpieces, in particular stamped and reshaped pot-shaped workpieces, produced in a method as set out above. Further embodiments are given in the dependent claims.
    BRIEF DESCRIPTION OF THE DRAWINGS
    Preferred embodiments of the invention are described below with reference to the drawings, which serve only for explanation and are not to be interpreted restrictively. In the drawings show:<tb> Fig. 1 <SEP> a plan view of the table of a press with a transfer device,<tb> Fig. 2 <SEP> an end view of the press with parts of the transfer device;<tb> Fig. 3 <SEP> in a) a partial section along line III-III in FIG. 1 on a larger scale, in b) a section from a) with a pair of grippers spring-loaded on one side, and in c) a section from a) with a pair of grippers spring-loaded on both sides;<tb> Fig. 4 <SEP> a transverse section through transport bars with one-sided spring-loaded grippers; and<tb> Fig. 5 <SEP> a section according to. C-C in Figure 4<tb> Fig. 6 <SEP> asymmetrical control of the transverse movement of the grippers.
    DESCRIPTION OF PREFERRED EMBODIMENTS
    Figures 1 and 2 show more or less schematically a press table 1 ', guide columns 2' and a press ram 3 '. In the usual way, the lower part is attached to the table 1 'and the upper part of a so-called transfer tool with several processing or forming stations connected in series is attached to the ram 3'. This tool is not shown in the drawing for the sake of simplicity.As a means of transport for the workpieces to be formed in the longitudinal direction (or longitudinal direction) through the individual forming stations, there is a transport rod 4 'on both sides of the tool with grippers 5' for the workpieces shown schematically here Transport rods are mounted on longitudinal slide 7 'by means of mounting brackets 6'. The longitudinal slides 7 '(cf. also FIG. 3a) are rigidly guided along two parallel guide rods 8', which in turn are fastened in a transverse slide 9 'which is guided along two parallel transverse guide rods 10'.
    The transverse movement of the gripper can, as shown here in the context of Figures 1-3, take place in that the transport rods 4 'with firmly attached grippers in the transverse direction, d. H. in the transverse direction, in order to grip the workpieces and release them again. As an alternative, however, as will be shown below in connection with FIGS. 4 and 5, the transverse movement of the grippers to a certain extent can be carried out on the transport rods 4 ', ie. H. With this design, the transport rods move only in the longitudinal direction synchronously with the press movement, and the grippers move synchronously with the press movement on these transport rods.
    The transverse movement of the transport rods 4 'in the opening direction outward is controlled in the embodiment according to Figures 1-3 by control rails 11', which are mounted on the press ram 3 'and with their external control cams 12' on control rollers 13 'of extensions 14 'The carriage 9' act on the extensions 14 ', on the other hand, the piston rods 15' of the pneumatic cylinders 16 'act in the opposite direction inwards. A reliable contact pressure always acts in the closing direction inwards on the extensions 14', so that the control rollers 13 ' always rest securely on the control cams 12 'of the control rails 11'.
    From Figures 2 and 3 it can be seen that during the downward movement of the control rails 11 'with the press ram 3', the control rollers 13 'and the associated parts, that is, the transport rods 4', are spread outwards so that a between two opposite holders 5 'clamped workpiece 17' is released. The holders 5 'are also laterally removed from the area of the upper and lower tool parts of the press, so that the tool can close in all stations for processing workpieces.
    In Figure 1 it is indicated that workpieces such as blanks 18 'are punched out of a transverse belt 19' in a punching and receiving station and are taken over by the outermost grippers of the transport bars 4 '. In successive work cycles, the workpieces 18 'are gradually shifted to the left and thus successively fed to the individual forming stations of the transfer tool. After a certain start-up time, all forming stations are each occupied with a workpiece 18 '. In each work cycle, the transport rods 4 here perform a closed rectangular movement in that in a first cycle they advance a number of captured blanks to the next following forming station of the transfer tool, in a second cycle they are removed laterally outward from the workpieces and from the overlap area with the tool, returned in a third cycle in the longitudinal direction and in a fourth cycle to grasp the workpieces again moved inwards towards the tool.
    The longitudinal drive of the transport rods 4 'comprises two leaf springs 20', which are attached with their right ends to the inside of the longitudinal slide 7 'and which can follow the transverse movements of the transport rods 4'. At one end, the two leaf springs 20 'are connected to a guide carriage that can be moved back and forth in the longitudinal direction and is driven by an electric servo motor 23' via a toothed belt 22 '. The servomotor 23 'is acted upon by a control signal 2'4 which is derived from the movement of the eccentric shaft of the press and by means of an angular rotary encoder (not shown).
    Instead of the servo motor 23 ', a hydraulic motor or a linear motor can also be used. Finally, instead of a motor and the toothed belt 22 ', a pneumatic or hydraulic cylinder could simply be used.
    The rigid grippers 5 'known from the prior art are not suitable for many applications, for example in the case of soft work piece materials. In addition, it has proven to be advantageous to omit or at least reduce the transverse movement of the grippers for certain workpieces and to design the detection of the workpieces differently.
    Accordingly, according to the present invention, it is possible and advantageous to design at least one of the grippers with an elastic spring element 21. Such a spring element 21 'can, as shown in FIG. 3 b, only be present in one of the two grippers in each case, or, as shown in FIG. 3 c, it can be present in both grippers.
    If such a gripper with a spring element 21 is arranged on only one side, the problem arises that with a completely symmetrical guidance of the gripper and with quasi simultaneous contact with the workpiece 17 'in the process of that gripper that is not sprung Position moves while the sprung side exerts a force due to the suspension. To compensate for this, the control of the transverse movement, for example via the control cam 12 ', is performed differently on the sprung side than on the non-sprung side. The two grippers are therefore asymmetrically guided in their transverse movement. The unsprung gripper does not drive onto the part, it only moves towards the part. The spring-loaded gripper moves asymmetrically (later) to position so that the part is not pushed out of position by the spring force. The speed of impact is defined by the shape of the drive curve of the gripper. The preferred procedure is that, in order to reduce the impact speed of the spring-loaded gripper on the part, the curve for the transverse movement becomes faster towards the end of the transverse movement.
    If both grippers are designed to be sprung, as shown in Figure 3c), it is possible to dispense with the transverse movement of the gripper and, if these are completely rigidly mounted on the transport rods, on the transverse movements of the transport rods, and To a certain extent, to lead the process in such a way that the workpiece is pressed between the two spring-loaded grippers for gripping, the grippers moving apart because of the suspension and clamping the workpiece, then being transported longitudinally to the next station, and there by the next tool be pressed out of this spring-loaded bracket. With the double suspension of the grippers, the transverse movement can either be omitted entirely or carried out in a simplified or reduced manner.
    One way of effectively realizing such a suspension on one side is illustrated in the context of FIGS. 4-6.
    FIG. 4 shows a section in the transverse direction through a gripper arrangement. The transfer device is provided along a longitudinal direction for several processing stations of the press tool, which implement various processing steps on the workpiece. The workpiece 11 is a cup-shaped component that is formed into a cup-shaped blank 11 in the first processing station. The feed device now has rod-shaped external control groups G1 and G2, each of which has grippers directed inward to a certain extent on one side. Such a control group G is made up of a gripper rod 2 and a push rod 3 guided in a longitudinal upwardly open groove 3. This groove is covered in sections by covers 10. As shown here, the cover 10 can only be designed in regions in individual sections that However, cover 10 can also be formed essentially over the length of the entire gripper bar 2.
    The gripper bars 2 have transverse through openings 9. The transverse through openings 9 serve to receive the gripping elements 4 and to store them in a transversely movable manner.
    The gripper elements 4 are each built up on one side from a gripper carrier 7 in which a gripper pin 5 is mounted. The gripper carrier 7 is slidably mounted in a through opening 9 of the gripper bar 2.
    At the input end, the push rod has a coupling element in each case. Similarly, each gripper bar 2 has a coupling element. Corresponding set screws allow optimum adjustment of both the gripper bar and the coupling element.
    The protruding on the right side from the left gripper rod G2 gripper elements 4 are, as explained above, expanded from two elements, a gripper carrier 7, in each of which a gripper pin 5 is mounted. The opposite gripper elements 4 protruding to the left in the right gripper rod G1 are not designed in two pieces, but as one-piece gripper forks 6. These gripper forks 6 have curved gripping areas, which will be explained in detail below, in contrast to the ends of the workpieces facing Gripper pins 5, these have no guiding function in the longitudinal direction.
    It can be seen in FIG. 4 how the push rod 3 is designed as a solid rod with a square cross-sectional area and slides in the groove 18 in the gripper rod 2. Furthermore, based on the sectional views at G1-G2, it can be seen how the covers 10 also have a downwardly open longitudinal groove 19 for better guidance of the gripper bar 2.
    In particular, based on the sectional view at G2 in Figure 4, it can also be seen how the guide pin 5 is spring-mounted in a recess provided for this purpose in the gripper carrier 7; this will be explained in detail below. It can also be seen how the gripper bars 2 have a V-shaped profile downwards; this is, for example, sliding in a V-shaped groove in a support structure which is stationary so that the gripper bars can slide in it in a controlled manner. As indicated by correspondingly darker areas, special sliding elements or coatings, for example made of PTFE, can be provided in or on the lower surfaces of the gripper bars. The open position of the grippers is illustrated here, which can also be seen in the fact that the link openings 26, which are explained further below, are now shown laterally on the outside with respect to the push rods 2.
    In Figure 5 above, the section along the line C-C in Figure 4 is shown. In this sectional view, the symmetrical compulsory control of the gripper elements and the specific design of the gripper elements for the closed state can be seen. The open state is illustrated in Figure 5 below.
    In FIG. 5 above it can be seen how the gripper carrier 7 is mounted in the respective gripper bar 2 in the transverse through opening 9 on the left side. To make the gripper carrier 7 easier to move, slide plates 20 can be provided, not only in the longitudinal direction on the boundary walls, as can be seen here, but also in the vertical direction, that is to say at the top and bottom in the recess 9 at the respective gripper carrier 7 Such gripper carrier 7 slides with its left-hand area in the recess 9, and on the right side the gripper carrier tapers to an extension which has a recess 22 in the form of a blind hole for the gripper pin. At its end facing away from the workpiece, the gripper pin 5 has a piston-shaped enlargement 21; this piston 21 is provided in an enlargement area of the passage 22 in the gripper carrier 7. A spring element 25 in the form of a spiral spring is provided in the inner region 24 of the passage 22. This spiral spring 25 braces the gripper pin 5 towards the workpiece until the piston 21 stops at the enlargement 23 of the passage 22. This optionally adjustable spring 25 allows the most gentle and always optimal gripping force possible, even on sensitive workpieces.
    At the end facing the tool, the gripper pin 5 has a gripper tip 34 which is linear, that is to say runs along the longitudinal direction. This gripper element 4 therefore only has a clamping effect in the transverse direction and no guiding effect in the longitudinal direction.
    This is in contrast to the one-piece gripper forks, which are arranged opposite one another and are indicated with the reference number 6. At their end facing the workpiece, these have a fork region 32 in the form of an extension, and the region of this extension facing the tool is provided as a curved gripping region 33, preferably with a curvature that is adapted to the radius of curvature of the workpiece at this position.
    Both the gripper carrier 7 and the rear area of the gripper fork 6, i.e. the extension 31, now have the vertical link openings 26, which are important in the present context. These link openings 26 are used to automatically control the transverse position of the gripper elements 4 by the push rod 3. For this purpose, the link openings 26 are designed to be round, stepped in the transverse direction. There is an area of the stop position 27 for the retracted gripper, and an area of the stop position 28 for the extended gripper. The position 27 is arranged on the workpiece side, and the extended position 28 is offset in the transverse direction further outward from the workpiece. In between there is a connection area or displacement area 29 which connects the areas 27 and 28 to one another.
    The link openings 26 in the opposite gripper carriers 7 or extensions 31 are designed in FIG. 5 with mirror symmetry with respect to the longitudinal axis 67.
    In this gate 26 now runs a vertical link pin 30, which is fixedly attached to the push rod 3 and protrudes from this down into the gate opening 26. If, starting from the position shown above in FIG. 5, the push rod 3 is moved downwards or backwards in the feed device of the tool in the longitudinal direction, the vertical link pin 30 also moves downwards with it. It cannot be shifted in the transverse direction; accordingly, on the left side, the gripper carrier 7 shifts to the left as the pin 30 migrates in the gate 26. If the push rod 3 is also moved down on the right side, the pin 30 moves analogously downwards and the rear extension 31 is moved to the right by this cam control. The position shown below in FIG. 5 is thus achieved. The grippers are now open.
    This control can take place either in that the push rod 3 moves downwards with the gripper rod 32 stationary, as described above, or by the push rod 3 remaining fixed and, starting from the position in FIG. 5 above, the gripper rod 2 further upwards is moved than the push rod 3.
    In the transfer process, the control of the gripping movement is now implemented in such a way that, starting from the position at the top in FIG. 5, the gripped workpiece is moved to the next processing station by synchronous longitudinal movement of the gripper rod and push rod. When the next position is reached, the push rod 3 is now shifted slightly back without moving the gripper rod, namely by a longitudinal offset which corresponds to the longitudinal distance between the positions 27 and 28. The push rod 3 thus moves back somewhat relative to the gripper rod 3 and the control in the link 26 automatically releases the workpiece in the correct position via the pin 30 through the transition illustrated in FIGS. 5 above and below.
    When the workpiece has been released, the transfer device now moves back to the first processing station in a position as shown in FIG. 5 below. Now, when the gripper bar has reached the end position, the push rod 3 is again shifted forwards somewhat without moving the gripper bar, namely by the longitudinal offset between 27 and 28, so that the workpiece can be gripped at the right moment in what is again the first processing station, consequently the grippers close, which corresponds to the transition from Figure 5 below to Figure 5 above.
    Thus, the relative movements of push rod 3 and gripper rod 2 are in each case in the movement section shortly after reaching the arrival in the transfer position and shortly after reaching the arrival of the transfer position slightly out of phase and the push rod 3 with a different path, which is realized by cam gears that set out below.
    In FIG. 6, the asymmetrical guidance of the transverse movement is now illustrated for the situation in which one of the grippers is spring-loaded (on the left-hand side). The gripper shown on the right is designed in the same way as that which was explained in connection with FIG. The construction of the opposite spring-loaded gripper is basically similar to that shown in FIG. 5, but differs from the construction according to FIG. 5 with regard to link opening 26. While in FIG. 5 the link openings of the two opposite grippers are symmetrical here the link opening 26 of the spring-loaded gripper between the two stop positions 27 (retracted position) and 28 (closed position) is connected to an arcuate curved area 70. There are therefore not areas in the link opening between the two end positions in which there is no lateral displacement of the gripper, between a short displacement area 29, but the displacement takes place more slowly over the entire curved area 70 between the two stop positions 27/28. This asymmetrical guidance takes into account the fact that a spring-loaded gripper 5 is arranged on one side and a non-spring-loaded gripper 6 is arranged on the other side.
    REFERENCE LIST
    1 'press table 2' guide columns 3 'press ram 4' transport rod 5 'gripper 6' mounting bracket 7 'longitudinal slide 8' guide rod 9 'cross slide 10' transverse guide rods 11 'control rail 12' control cam 13 'control roller 14' extensions 15 'piston rod 16 'pneumatic cylinder 17' workpiece 18 'blank 19' transversely running belt 20 'leaf springs 21' elastic spring element 22 'toothed belt 23' electric servomotor 24 'control signal 1 feed device 2 gripper rod 3 push rod 4 gripper element 5 gripper pin 6 gripper fork 7 gripper carrier for 5 9 transverse through openings for gripper elements 10 cover 11 component / workpiece 19 downwardly open guide groove in 10 for 2 20 sliding plate 21 piston of 5 22 passage in 7 23 extension of 22 24 inner area of 22 25 spring element 26 vertical gate opening in 7 27 stop position gripper withdrawn from 26 28 Stop position gripper extended from 26 29 Shift range from 26 30 vertical he link pin for 26 to 3 31 rear extension of 6 32 fork area of 6 33 curved gripping area of 6 34 hook tip of 5 70 curved area of 26 G1 gripper rod position 1 G2 gripper rod position 2 F spring travel
    权利要求:
    Claims (10)
    [1]
    1. Press (1 '- 3') with a transfer device for the step-by-step transport of workpieces (18 ', 11) in a longitudinal direction from a receiving station through at least one processing station of the presswherein the transfer device comprises transport means (4 ', 1) for the workpieces (18', 11) in order to move them cyclically and synchronously with the movement of the press in the longitudinal direction and for gripping or releasing the workpieces (18 ', 11) in to move back and forth at least partially or in areas in a transverse direction perpendicular to it,dadurh marked thatthe transport means comprise grippers (5 ', 5, 6), andthat at least one of the grippers (5 ', 5) gripping the workpieces (18', 11) between the processing stations from both sides, transporting it in the gripped state in the longitudinal direction to the next processing station and releasing it again in the next processing station, is sprung and counteracted with an elastic restoring force the workpiece (18 ', 11) is formed.
    [2]
    2. Press with transfer device according to claim 1, characterized in that the suspension of the at least one gripper (5 ', 5) is formed by compressed air or an elastic spring element (21'), this spring element preferably by a leaf spring, a helical spring, or an elastomer spring is formed.
    [3]
    3. Press with transfer device according to one of the preceding claims, characterized in that at least one of the grippers (5, 5 ') has a gripper carrier (7) which is mounted exclusively transversely displaceable in a gripper rod (2), and in this gripper carrier ( 7) has a displaceable gripper pin, which is preferably elastically clamped against the workpiece, preferably via a spring, in particular a helical spring (25), or via compressed air or an elastomer spring, the return preferably being configured to be adjustable.
    [4]
    4. Press with transfer device according to one of the preceding claims, characterized in that said spring-loaded grippers are arranged on both sides of the workpiece.
    [5]
    5. Press with transfer device according to one of claims 1-3, characterized in that a named spring-loaded gripper (5) is arranged only on one side of the workpiece, and on the opposite side an unsprung named gripper (6).
    [6]
    6. Press with transfer device according to claim 5, characterized in that the transverse movement of the grippers (4) arranged on opposite sides of the workpiece is not necessarily controlled mirror-symmetrically with respect to the workpiece position, the control of the transverse movement preferably being carried out asymmetrically so that the impact speed of the spring-loaded gripper on the workpiece is less than that of the non-spring loaded gripper.
    [7]
    7. A method for the step-by-step production of workpieces, in particular starting from a flat, strip-shaped starting material, preferably made of metal, particularly preferably steel or aluminum, using a press with a transfer device according to one of the preceding claims, wherein the workpiece (18 ', 11) is gripped at least once from both sides by a pair of grippers and transported to a subsequent processing station.
    [8]
    8. The method according to claim 7, characterized in that after a first punching step and a subsequent first forming step, the workpiece (18 ', 11) is gripped at least once from both sides by a pair of grippers and transported to a subsequent processing station.
    [9]
    9. The method according to claim 8, characterized in that both grippers (5, 6) are spring-loaded, and that the transverse movement of the grippers consists at least partially or exclusively in that the workpieces (18 ', 11) by the processing tool at this processing station against the spring force of the gripper is pushed into this for holding,or characterized in that only one of the grippers (5, 6) is spring-loaded, and that the transverse movement of the grippers (4) arranged on opposite sides of the workpiece (18 ', 11) is not necessarily controlled mirror-symmetrically with respect to the workpiece position, preferably the The transverse movement is controlled asymmetrically so that the impact speed of the spring-loaded gripper (5) on the workpiece is lower than that of the non-spring-loaded gripper (6).
    [10]
    10. Workpiece (18 ', 11) made of metal, in particular a stamped and formed cup-shaped workpiece (18', 11) made of metal, produced in a method according to one of claims 7-9.
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    同族专利:
    公开号 | 公开日
    WO2020178138A1|2020-09-10|
    EP3702062A1|2020-09-02|
    EP3930937A1|2022-01-05|
    CH715795B1|2020-07-31|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3939992A|1974-09-26|1976-02-24|Mikulec Richard A|Workpiece transfer mechanism|
    US4404837A|1979-07-11|1983-09-20|American Can Company|Press transfer bar|
    US4735303A|1986-08-26|1988-04-05|Wallis Bernard J|Transfer apparatus|
    ES2055574T3|1990-12-11|1994-08-16|Styner & Bienz Ag|PROVISION OF TRANSPORTATION IN A PRESS.|
    EP0504098B1|1991-03-15|1995-04-19|STYNER &amp; BIENZ AG|Transfer arrangement on a press|
    CH688128A5|1993-06-21|1997-05-30|Styner & Bienz Ag|A method for feeding and feeding a strip and strip investors for implementation of this procedure.|
    CH688647A5|1994-07-29|1997-12-31|Styner & Bienz Ag|Transfer arrangement on a press.|
    EP1119508B1|1998-10-05|2004-03-17|Adval Tech Holding AG|Transferring device on a press|
    EP1633507A1|2003-06-13|2006-03-15|Adval Tech Holding AG|Transfer device on a press|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    EP19160179.8A|EP3702062A1|2019-03-01|2019-03-01|Feeding device for a transfer press|PCT/EP2020/055162| WO2020178138A1|2019-03-01|2020-02-27|Feed apparatus for transfer press|
    EP20706313.2A| EP3930937A1|2019-03-01|2020-02-27|Feed apparatus for transfer press|
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