EP3093079B1 - Einzugseinrichtung für umformmaschine - Google Patents

Einzugseinrichtung für umformmaschine Download PDF

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Publication number
EP3093079B1
EP3093079B1 EP16166657.3A EP16166657A EP3093079B1 EP 3093079 B1 EP3093079 B1 EP 3093079B1 EP 16166657 A EP16166657 A EP 16166657A EP 3093079 B1 EP3093079 B1 EP 3093079B1
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EP
European Patent Office
Prior art keywords
infeed
roller
installation
feed
shaft
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EP16166657.3A
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German (de)
English (en)
French (fr)
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EP3093079A1 (de
Inventor
Andreas Sigg
Uwe-Peter Weigmann
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Wafios AG
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Wafios AG
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Priority to HRP20200389TT priority Critical patent/HRP20200389T1/hr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F23/00—Feeding wire in wire-working machines or apparatus
    • 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
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/006—Feeding elongated articles, such as tubes, bars, or profiles
    • 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
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B21D43/08—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F3/00—Coiling wire into particular forms
    • B21F3/02—Coiling wire into particular forms helically

Definitions

  • the invention relates to a drawing-in device for a forming machine for drawing an elongated workpiece, in particular a wire or a tube, from a workpiece supply to a forming device of the forming machine, and to a forming machine with such a drawing-in device.
  • Forming machines are machine tools that, with the help of suitable tools made of elongated semi-finished products such as wire, pipe, strip or the like, can produce smaller or larger series of molded parts with partly complex geometry in an automatic manufacturing process, mainly by forming.
  • a forming machine can be, for example, a bending machine for producing two-dimensionally or three-dimensionally bent bending parts from wire material, strip material or tube material by bending, or a spring manufacturing machine for producing compression springs, tension springs, leg springs or other spring-like molded parts by spring winders or spring coils.
  • Such a forming machine has a plurality of controllable machine axes, a drive system with a plurality of electrical drives for driving the machine axes and a control device for coordinated control of work movements of the machine axes in a manufacturing process in accordance with a computer-readable control program specific to the manufacturing process.
  • the wire (spring wire) is drawn in or conveyed from a workpiece supply (e.g. reel) to a forming device of the forming machine under the control of an NC control program by means of a drawing device of the forming machine.
  • a workpiece supply e.g. reel
  • the supplied wire is shaped with the help of tools of the shaping device to form a helical spring or another shaped part.
  • the finished molded part is separated from the supplied wire under the control of the NC control program by means of a cutting device. This process is repeated cyclically for each molded part to be manufactured.
  • a feed device of the type considered here has at least one pair of feed rollers which has two feed rollers which are arranged with axes of rotation which are parallel to one another and can be driven to rotate in opposite directions. With their profiled circumferential surfaces, the feed rollers limit a feed gap for passing the workpiece (e.g. wire or tube).
  • the feed speed and feed direction of the material to be processed can thus be predetermined by controlling the speed and direction of rotation of the feed rollers.
  • the feed rollers are intended to ensure that the material can be transported through the feed nip without slippage, and should therefore act on the material to be conveyed with a high degree of clamping force, but still gently.
  • Each of the feed rollers is attached to the free end of an associated feed shaft by means of a roller tensioning system.
  • the feed shaft is coupled to a drive and transfers the drive forces to the feed rollers.
  • the connection between the feed shaft and the feed roller should be rotationally fixed so that the rotation of the feed shaft can be converted into a conveying movement without play. Since the feed rollers are machine elements dependent on the geometry of the processed workpiece, it should be relatively easy for a machine operator to replace them.
  • the feed device is generally arranged relatively close to the area of the forming tools of the forming device.
  • the space in the immediate vicinity of the forming device is often required in modern forming machines to attach additional components, e.g. a camera to observe the processes during forming.
  • the feeder should therefore take up as little space as possible in areas that are well suited for attaching additional components.
  • the JP 2004 082198 A discloses a drawing device for a forming machine in the form of a spring machine for drawing a wire from a wire supply to a forming device of the forming machine.
  • the feed device has a pair of feed rollers which have two feed rollers which are arranged with axes of rotation parallel to one another and can be driven in opposite directions. With profiled peripheral surfaces, the feed rollers delimit a feed nip for the passage of the wire.
  • Each of the feed rollers is rotatably and interchangeably attached to one end of an associated feed shaft by means of a roller tensioning system.
  • the roller clamping system has a clamping screw centered on the axis of rotation of the feed roller with a threaded section and a head section which is wider than the threaded section.
  • the clamping screw presses a press plate against the respective roller, whereby the roller is braced with the shaft. To do this, the clamping screw is screwed into the shaft.
  • the invention has for its object to provide a feed device of the type mentioned, which allows a quick change of feed rollers with a safe function and also takes up little space next to the feed rollers.
  • the clamping screw has a recess which is open on the head side and has a non-circular driving profile for inserting a clamping tool.
  • the threaded section should fit into a front internal thread of the feed shaft in order to be able to screw the tensioning screw into the feed shaft.
  • the head section which is offset axially to the threaded section, is used to clamp the feed roller on the feed shaft.
  • the tensioning screw which is also referred to in this application as the central tensioning screw, can be the only tensioning element to be operated by the operator of the connection between the feed shaft and the feed roller. Further, separately actuated tensioning elements are not necessary and are preferably not provided. For the operator, it may therefore be sufficient to loosen the tensioning screw to replace a feed roller, to replace the feed roller with another feed roller and to fasten or tighten the tension screw again. This greatly simplifies the change of feed rollers and only takes a little time.
  • a clamping tool that has a section that fits into the recess that is open on the head side and that has a non-circular driving profile that matches the non-circular driving profile of the recess.
  • the shape of the head section can be optimized for its other functions.
  • the head section can be relatively flat, since the reliability of the rotational connection between the tensioning tool and the tensioning screw optimizes the shape and depth of the recess with a non-circular driving profile can be.
  • the head section of the clamping screw it is possible, for example, for the head section of the clamping screw to be delimited by a circular-cylindrical circumferential surface, so that the head section can be designed to be rotationally symmetrical except for the region of the recess. This enables a particularly uniform distribution of clamping forces when tightening the clamping screw.
  • Feed devices according to the claimed invention are further characterized by a washer, which is arranged in the assembled state of the feed roller with at least one inner portion between the head portion of the tensioning screw and a side surface or outer surface of the feed roller facing the head portion.
  • a washer With the help of a washer, it is possible to distribute the clamping force generated by the clamping screw over a large area, whereby a better frictional connection between the clamping screw and the feed roller can be achieved.
  • the washer could be closed in the circumferential direction, that is to say it could only have an inner through opening for the threaded portion to pass through.
  • a washer is provided, in which it has a through opening for passing the threaded section through, the through opening merging on one side into a radially continuous side opening, the clear width (measured tangential to the circumferential direction) larger than an outer diameter of the threaded section and is smaller than a maximum diameter of the head section.
  • Such a washer can be inserted or removed without having to completely unscrew the clamping screw from the feed roller. The clamping screw can therefore remain in the partially screwed-in state.
  • a radially inner recess can be provided on an inner side of the washer facing the feed roller in such a way that a protruding support ring running around the outer edge of the washer is formed on the inner side.
  • the support ring can be continuous in the circumferential direction. Instead, a plurality of ring segments or support zones spaced apart in the circumferential direction can also be formed in order to obtain spatially limited support areas at certain points. In one variant, there are exactly three contact surfaces or contact zones, which effect three-point support.
  • the washer can have a circular or arc-shaped outer contour. However, this is not mandatory. Other shapes of the outer contour are also possible, e.g. polygonal shapes such as triangle, square or hexagon, with rounded corners if necessary.
  • the feed shaft has a shaft collar and an adjoining end extension for plugging on a feed roller
  • the feed roller has a central through-bore whose inner diameter is larger than an outer diameter of the extension.
  • This dimensioning of the head section is particularly advantageous in connection with a laterally open washer, since in this case the tension screw only has to be loosened, but not completely unscrewed, to replace a feed roller.
  • the tension screw only has to be loosened, but not completely unscrewed, to replace a feed roller.
  • the washer can then be removed from the side and the feed roller pulled outwards over the head section of the screw.
  • Another pull-in roller is then mounted the other way round by first pushing the pull-in roller over the head section of the screw onto the extension before the washer is inserted laterally and then the clamping screw is tightened.
  • the recess is designed as an internal hexagon recess. This makes it possible to achieve very high torques or tightening torques when tightening the clamping screw using commercially available clamping tools with an external hexagon cross section.
  • the open recess can have an inner five-sided profile, an inner square profile, an inner multi-tooth profile or a slot profile, possibly with crossed slots.
  • the head-side open recess can be so deep that it projects into the area of the threaded section. This favors reliable transmission of even high torques.
  • the recess is designed as a through recess that passes axially through the clamping screw.
  • a sufficient depth of the recess can be achieved in order to obtain sufficient force transmission surfaces on the driving profile.
  • the continuous through-cut provides direct access to the central area of the free end of the feed shaft.
  • Lubricant can be introduced through the grease nipple with the tightening screw tightened.
  • the clamping screw is designed as a flat-head clamping screw, in which a height of the head section (measured parallel to the axis of the clamping screw) is smaller than a diameter of the threaded section.
  • a height of the head section (measured parallel to the axis of the clamping screw) is smaller than a diameter of the threaded section.
  • the design as a flat-head clamping screw is possible in particular in that the clamping screw has the recess which is open on the head side and which is sufficient for attaching a clamping tool.
  • a (maximum) diameter of the head section is at least twice as large as the diameter of the threaded section.
  • the head section can thus be relatively wide or planar in comparison to its height. Such a wide head section can, if required, rest directly on the outside of the feed roller in the clamped state, that is to say in particular without the interposition of a washer or the like, and thereby transmit clamping forces to it.
  • the inside of the head section of this variant facing the threaded section can be flat, so that it can rest over a large area on a likewise flat outside of a feed roller. It has been found, however, that it can be advantageous if a radially inner flat recess is provided on the inside of the head section in such a way that on the inside of the head section a support ring is formed which extends around the outer edge of the head section and projects in the direction of the threaded section. It can thereby be achieved that when the tensioning screw is tightened, the tensioning force is transmitted exclusively via contact surfaces in the region of the radially outer support ring, which supports particularly reliable transmission of the torque or particularly reliable entrainment.
  • the support ring can be closed in the circumferential direction, but this is not mandatory. It can consist of one or more ring segments, between which there is a distance in the circumferential direction. In general, a plurality of relatively small-area support surfaces or support zones can be formed, e.g. exactly three contact surfaces. In this way, the force distribution can be influenced if necessary.
  • the tensioning screw provides a non-positive connection between the feed shaft and the feed roller, whereby some of the special measures mentioned can help to improve the frictional connection, so that a relative rotation between the feed shaft and the feed roller is avoided or made very difficult.
  • the feed rollers are exposed to strong accelerations (increase in the speed of rotation) or braking movements (reduction in the speed of rotation), possibly in frequent alternation, so that it cannot be ruled out that an exclusively force-locking connection slowly loosens.
  • additional measures are therefore provided for producing a positive connection acting in the circumferential direction between the feed shaft and the feed roller.
  • the feed shaft has a shaft collar with an end-face contact surface for applying the feed roller, at least one drive pin, which projects beyond the contact surface and is eccentric to the axis of rotation and is dimensioned for insertion into an eccentric drive bore of the feed roller, being attached to the shaft collar.
  • a plurality of driving bolts are provided, in particular three driving bolts distributed in a uniform angular division around the central axis.
  • a driving pin has a slight undersize compared to the assigned driving hole in such a way that the outside diameter of the driving pin is slightly smaller than the inside diameter of the driving hole, so that there is little play remains in the radial direction.
  • a play compensation device is provided in some embodiments, which can be actuated by tightening the tensioning screw in such a way that when the tensioning screw is tightened an existing play between the driving pin and the driving hole is eliminated becomes.
  • a positive connection in the circumferential direction can thus be created, so that gradual loosening after multiple acceleration and braking is avoided.
  • the backlash compensation device is actuated by tightening the clamping screw, so it does not require any actuating elements separate from the clamping screw.
  • the play compensation device has a play compensation element which is arranged on the driving pin and can be expanded radially by the action of an axial force, the play compensation device being dimensioned in such a way that the play compensation device is relaxed (for example, when the tightening screw is unscrewed or partially loosened). with the feed roller resting on the shaft collar, an actuating section of the play compensation device projects beyond the side surface of the feed roller facing away from the shaft collar.
  • the head section of the tensioning screw presses on the actuating section and exerts the axial force on the play compensation element, which in response to this is expanded radially and eliminates the play between the driving pin and the driving hole.
  • a structurally simple and yet effective play compensation device is created in that an elastically compressible molded element is used as the play compensation element, which is compressed via an outer actuating sleeve when the tensioning screw is tightened.
  • the shaped element can e.g. an O-ring made of an elastically compressible elastomer.
  • the invention also relates to a forming machine which has a forming device with one or more forming tools and a drawing-in device for drawing in an elongated one Has workpiece, in particular a wire or tube, from a material supply in the area of the forming device.
  • the feed device is a feed device of the type described in this application.
  • the forming machine can in particular be a spring manufacturing machine or another wire processing machine or a pipe bending machine.
  • the schematic overview in Fig. 1 shows elements of a forming machine in the form of a CNC spring winding machine 100 according to an embodiment.
  • the spring coiling machine 100 has a feed device 110, which feeds successive wire sections of a wire 115 coming from a wire supply and guided through a straightening unit with a numerically controlled feed speed profile into the area of a forming device 120.
  • the wire is formed into a coil spring F using numerically controlled tools of the forming device.
  • the tools include two windpins 122, 124 arranged offset by 90 °, which are adjustable in their position and determine the diameter of the spring produced.
  • a pitch tool 130 has a tip oriented substantially perpendicular to the spring axis, which engages next to the windings of the developing spring. The slope of the turns can thus be specified.
  • a numerically controllable separating tool 150 is attached above the spring and, after the forming operations have been completed, separates the produced coil spring from the supplied wire supply with a vertical working movement.
  • a separating tool can also be arranged below the spring, e.g. for springs with a different twist sense.
  • the machine axes of the CNC machine belonging to the tools are controlled by a computer numerical control device 180, which has storage devices in which the control software resides, to which, inter alia, an NC control program for the working movements of the machine axes belongs.
  • the wire is advanced from the position shown with the aid of the pull-in device 110 in the direction of the wind pins 122, 124 and is deflected by the wind pins to the desired diameter with the formation of an arcuate curvature until the free wire end reaches the pitch tool 130.
  • the axial position of the pitch tool determines the current local pitch of the developing coil spring.
  • the pitch tool is moved axially under the control of the NC control program if the Slope to be changed.
  • the adjusting movements of the pitch tool essentially determine the course of the pitch along the helical spring.
  • the spring coiling machine is equipped with a camera-based, optical measuring system for contactless real-time acquisition of data about the geometry of a spring that is currently being manufactured.
  • the measuring system has a CCD camera 250 mounted on a machine-fixed carrier, which can deliver two-dimensional images to a connected image processing system via an interface.
  • the software for the image processing is accommodated in a program module, which cooperates with the control device 180 of the spring winding machine or is integrated into it.
  • the camera is attached laterally next to a wire guide device in the area immediately in front of the feed device 110 and its position can be adjusted.
  • the machine-level camera 250 is mounted in such a way that its rectangular image field can capture part of the developing spring immediately after leaving the forming tools in order to determine the spring geometry generated.
  • the feed device 110 provides the wire feed with a predeterminable feed speed profile.
  • the feed device gradually pulls the wire from a wire supply, for example a reel, and leads the wire to the forming tools of the forming device.
  • the feed device has two feed roller pairs 112 and 114 which are connected in series in the direction of passage of the workpiece.
  • Each of the feed roller pairs has two feed rollers which are arranged with horizontal axes of rotation parallel to one another.
  • the feed rollers can be driven in opposite directions by means of a drive in order to achieve the conveying movement.
  • the feed rollers have profiled peripheral surfaces with circumferential grooves, the shape and size of which is adapted to the cross section of the workpiece to be conveyed. With the circumferential surfaces, the feed rollers of a pair of feed rollers delimit a feed nip through which the workpiece is passed.
  • Each of the feed rollers sits at the free end of a feed shaft which is rotatably mounted in the machine frame with a horizontal axis of rotation.
  • Each of the feed rollers is rotatably and interchangeably attached to the end of the associated feed shaft by means of a roller tensioning system.
  • the roll clamping system has several tasks to perform. On the one hand, a reliable, rotationally fixed fastening must be ensured so that the rotary movements of the feed shaft can be transmitted to the feed roller and the workpiece conveyed thereby without slippage. On the other hand, it should be possible for an operator to carry out a roll change as conveniently and quickly as possible.
  • a roll change is necessary, for example, if the Forming machine for the use of another type of workpiece, for example a wire with a different diameter, must be converted. Even if the feed rollers are worn out, the work required for the replacement should take as little time as possible.
  • the roll tensioning system should also be designed in such a way that as little space as possible is required in the area in front of the feed rollers, for example in order to be able to bring the camera 250 so close to the feed device that its detection area can detect the wire as soon as it emerges from the wire guide. so that even with the production of very short springs, observation via the camera is possible.
  • FIG. 3 shows a feed shaft 300 which can be driven by means of the assigned drive about an axis of rotation 310 with different directions of rotation and speeds of rotation.
  • a shaft collar 302 is formed on the shaft body, that is to say a diameter widening which offers a flat contact surface 303 for a draw-in roller 400 on its front side.
  • the pull-in shaft carries the associated pull-in roller 400 at its free end.
  • the pull-in roller 400 is pushed onto the extension 304 and bears against the free front of the shaft collar 302.
  • the axial height of the extension 304 is a few tenths of a millimeter less than the thickness (measured in the axial direction) of the feed roller.
  • the feed roller has a profiled circumferential surface 410, in which two circumferential C-shaped grooves are incorporated in the example, the shape of which is adapted to the shape of the wire to be conveyed.
  • the feed roller has three drive bores 402 which are continuous in the axial direction and whose inner diameter is so are adapted to the outer diameter of the associated driving bolts 320 such that the driving bolts fit into the associated driving bores with little lateral play when the feed roller is put on.
  • Each feed roller has a central through-bore 406, the inner diameter of which is adapted to the outer diameter of the extension 304 such that the feed roller sits on the extension largely without play.
  • the feed roller 400 is tensioned on the feed shaft 300 by means of a central tensioning screw 500.
  • the tensioning screw is centered on the axis of rotation 310 of the feed shaft.
  • the tensioning screw is the only tensioning element of the roller tensioning system that has to be operated by the operator in order to mount a feed roller or to remove it from the feed shaft.
  • the clamping screw 500 has a threaded section 520, the external thread of which fits into the internal thread of the end recess 306 of the feed shaft.
  • Integral with the threaded section is a flat head section 510, which in the assembled state presses with its flat inner side 512 facing the threaded section onto the flat outer side of the feed roller 400 and thereby tensions the feed roller against the roller collar 302.
  • the head section has a circular cylindrical outer contour.
  • a recess 530 in the form of an internal hexagon recess is formed in the center of the tensioning screw.
  • the hexagon socket serves as a non-circular driving profile for actuating the clamping screw using a suitably contoured clamping tool with an external hexagon profile.
  • the recess 530 is designed as a continuous recess in the axial direction, so that access to the lubricating nipple 380 is possible through the recess even when the tensioning screw is inserted.
  • the head section 510 does not have to be specially designed for attaching a clamping tool.
  • the head section can thus be optimally designed for the task of bracing the feed roller with the feed shaft.
  • the head section can be relatively flat, so that the clamping screw can be designed as a flat-head clamping screw. This makes it possible to move a camera or other accessory very close to the feed rollers.
  • the height H of the head section (measured parallel to the axis of rotation 310) is many times smaller than the outside diameter of the threaded section and is less than 20% of this outside diameter in the example.
  • the diameter of the head section is significantly larger than the diameter of the threaded section, for example at least twice as large. This ensures a wide contact surface of the head section on the feed roller.
  • a radially inner flat recess 513 which is designed in such a way that an outer bearing ring 514 is formed, which runs around the outer edge of the head section and projects slightly towards the threaded section ( see dashed line).
  • a corresponding flat recess 313 can also be provided on the front or outside of the shaft collar 302 facing the feed roller (see dashed line). It can thereby be achieved that an annular support surface for the feed roller is formed on the outside of the shaft collar.
  • the tensioning screw 500 When the tensioning screw 500 is tightened, there is a reliable frictional or frictional connection between the feed shaft with the tension screw on the one hand and the feed roller mounted on the shaft on the other hand. Furthermore, the driving pins 320 can ensure a positive driving of the feed roller. However, the bolts are provided with a slight undersize to make it easier to put on and remove the feed roller compared to the driving hole, so that theoretically there is the possibility of backlash when changing the direction of rotation.
  • a play compensation device 360 is provided in the area of the connection between driving pin 320 and driving bore 402 (cf. Fig. 4 ), which is automatically actuated when the tensioning screw is tightened via its head section 510 and eliminates any remaining play between the driving pin and the driving hole.
  • the drive pin 320 which is designed as a stud, has a cylindrical first section 312 close to the shaft collar, the outer diameter of which is only slightly smaller than the inner diameter of the drive hole, and a front section adjoining it 314 with a smaller diameter.
  • a shaped element in the form of an O-ring 362 is pushed onto the front section and rests on the inner cylindrical part 312.
  • An actuating sleeve 364 is placed on the front, which fits captively on the front section 314 and rests on the O-ring with its front side facing the shaft collar.
  • the length of the sleeve is dimensioned such that its sleeve head protrudes slightly beyond the flat outside 414 of the feed roller in the relaxed state (for example when the tensioning screw has not yet been installed).
  • the head section presses with the inside facing the feed roller onto the actuating sleeve 364, as a result of which the O-ring is axially compressed and radially widened in the manner of a spreading element.
  • any play is pressed out of the connection between the driving pin and the driving bore in the tensioned state, so that this connection now acts without play as a positive connection in the circumferential direction.
  • roller tensioning system can be used with the same feed shafts and the same feed rollers as the first embodiment. These components therefore have the same reference numerals as in the first exemplary embodiment and with regard to their configuration, reference is made to the description there.
  • the roll clamping system comprises a clamping screw 600 with a head section 610, a threaded section 620 and a central hexagon socket opening 630 for a clamping tool.
  • a washer 700 is also provided, which in the assembled state of the feed roller lies at least with an inner section 710 between the head section 610 of the tensioning screw and a side surface (flat outer surface) of the feed roller facing the head section. The flow of force between the tensioning screw and the feed roller is guided through the washer.
  • the washer is not closed in the circumferential direction, but is essentially crescent-shaped or C-shaped with a lateral opening.
  • a through opening 725 the inside diameter of which is slightly larger than the outside diameter of the threaded section of the clamping screw, merges on one side into a radially continuous side opening 727.
  • the clear width 728 of this side opening measured between the ends of the free limbs of the washer is slightly larger than the outside diameter of the threaded section of the tensioning screw and in the example corresponds to twice the radius of curvature of the circularly shaped part of the through hole.
  • the inner section 710 of the washer adjoining the through hole is somewhat flatter than the thicker or more solid outer section 720, which with its inner contour directly adjoins the outer contour of the head section when the tensioning screw is mounted.
  • the washer 700 On its inside facing the feed roller 400, the washer 700 has a flat, radially inner recess 713, so that in the outer region there is a circumferential bearing ring 714 facing the feed roller, in the area of which the tensioning force of the tensioning screw is transmitted to the feed roller.
  • the outer diameter of the washer can be selected so that there is a sufficiently large contact surface for the transmission of a frictional engagement or a large radial distance between the support ring and the center in order to bring about an effective frictional engagement. Since when using a washer, the head section 610 of the tensioning screw 600 is no longer required for direct power transmission to the feed roller, the diameter of the head section can be significantly smaller than in the other exemplary embodiment. As in Fig. 6 As can be clearly seen, the outer diameter D of the head section 610 is somewhat smaller than the inner diameter of the central through-bore 406 of the feed roller. This makes it possible to put on or remove the feed roller without loosening the clamping screw 600 completely and removing it from the internal thread of the feed shaft.
  • FIG. 10 shows an example of a variant of a washer 1000 with a substantially triangular shape of the outer contour with rounded corners. As with the variant of the 6 to 8 a lateral through opening is provided so that the washer can be inserted or removed when the clamping screw is screwed in.
  • Fig. 11 shows in Figure 11A a top view of and in Figure 11B a section through a washer 1100.
  • a flat, radially inner recess 1113 is formed on the inside of the washer 1100 facing the feed roller, so that in the outer area there is a support ring facing the feed roller, in the area of which the tensioning force of the tensioning screw is transmitted to the feed roller.
  • the support ring is interrupted in the circumferential direction, so that three circumferentially offset ring segments or support zones 1114-1, 1114-2 and 1114-3 are formed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)
  • Wire Processing (AREA)
  • Forwarding And Storing Of Filamentary Material (AREA)
  • Press Drives And Press Lines (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Massaging Devices (AREA)
  • Threshing Machine Elements (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
EP16166657.3A 2015-05-06 2016-04-22 Einzugseinrichtung für umformmaschine Active EP3093079B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
HRP20200389TT HRP20200389T1 (hr) 2015-05-06 2020-03-10 Uređaj za umetanje na stroju za oblikovanje

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DE102017207612A1 (de) * 2017-05-05 2018-11-08 Wafios Aktiengesellschaft Verfahren zur Herstellung eines Biegeteils und Biegemaschine zur Durchführung des Verfahrens
DE102020202347A1 (de) 2020-02-24 2021-08-26 Wafios Aktiengesellschaft Einzugseinrichtung für Umformmaschine
CN114210800B (zh) * 2021-11-24 2024-04-16 乐清市嘉得电子有限公司 一种用于连接器端子生产的冲床机

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JPS608896B2 (ja) * 1982-01-27 1985-03-06 株式会社阪村機械製作所 送りロ−ルワンタツチ交換装置
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JP6231612B2 (ja) 2017-11-15
JP2016209932A (ja) 2016-12-15
HRP20200389T1 (hr) 2020-06-12
EP3093079A1 (de) 2016-11-16
CN106111855A (zh) 2016-11-16
DE102015208346A1 (de) 2016-11-10
DE102015208346B4 (de) 2017-02-23
CN106111855B (zh) 2019-03-19

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