EP3093079A1 - Dispositif d'insertion pour banc de formage - Google Patents

Dispositif d'insertion pour banc de formage Download PDF

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Publication number
EP3093079A1
EP3093079A1 EP16166657.3A EP16166657A EP3093079A1 EP 3093079 A1 EP3093079 A1 EP 3093079A1 EP 16166657 A EP16166657 A EP 16166657A EP 3093079 A1 EP3093079 A1 EP 3093079A1
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EP
European Patent Office
Prior art keywords
feed roller
clamping screw
feed
shaft
threaded portion
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.)
Granted
Application number
EP16166657.3A
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German (de)
English (en)
Other versions
EP3093079B1 (fr
Inventor
Andreas Sigg
Uwe-Peter Weigmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wafios AG
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Wafios AG
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Filing date
Publication date
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Publication of EP3093079A1 publication Critical patent/EP3093079A1/fr
Application granted granted Critical
Publication of EP3093079B1 publication Critical patent/EP3093079B1/fr
Priority to HRP20200389TT priority Critical patent/HRP20200389T1/hr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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 in an elongate 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 can produce smaller or larger series of molded parts with partially complex geometry mainly by forming using suitable tools made of elongated semi-finished products such as wire, tube, strip or the like in an automatic manufacturing process.
  • a forming machine can be, for example, a bending machine for producing two-dimensionally or three-dimensionally bent bent parts of 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 shaped parts by spring winds 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 the coordinated control of working movements of the machine axes in a manufacturing process according to a computer-readable control program specific to the manufacturing process.
  • the wire is fed or fed under control of an NC control program by means of a drawing-in device of the forming machine from a workpiece supply (eg, reel) to a forming device of the forming machine.
  • a drawing-in device of the forming machine from a workpiece supply (eg, reel) to a forming device of the forming machine.
  • forming device of the supplied wire is transformed by means of tools of the forming device to form a coil spring or other molded part.
  • the finished molded article is separated from the supplied wire under the control of the NC control program by means of a cutter. This process repeats cyclically for each molded part to be manufactured.
  • a retraction device of the type considered here has at least one pair of feed rollers, which has two feed rollers, which are arranged with mutually parallel axes of rotation and can be driven in opposite directions rotating.
  • the feed rollers define with their profiled peripheral surfaces a nip for passing the workpiece (e.g., wire or pipe).
  • the feed rollers should ensure as slip-free as possible transport of the material through the feed nip and should therefore attack with high clamping force, but still gently friction on the material to be delivered.
  • Each of the feed rollers is fixed by means of a roll tensioning system at the free end of an associated feed shaft.
  • the feed shaft is coupled to a drive and transmits the driving forces to the feed rollers.
  • the connection between the input shaft and feed roller should be rotationally fixed in order to implement the rotation of the feed shaft without play in a conveying movement can. Since the feed rollers are machine elements dependent on the geometry of the processed workpiece, they should be relatively easy to replace by a machine operator.
  • the retraction device is usually arranged relatively close to the region 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 collection device should therefore take as little space as possible in areas that are well suited for the attachment of additional components.
  • the invention has for its object to provide a retraction device of the type mentioned above, which allows for safe operation a quick change of feed rollers and further claimed little space in addition to the feed rollers.
  • the roll tensioning system has a clamping screw centered on the axis of rotation of the draw-in roll and having a threaded portion and a head portion which is wider than the threaded portion.
  • the clamping screw has a head-side open recess with a non-round driving profile for inserting a clamping tool.
  • the threaded section should fit into an end-face internal thread of the draw-in shaft in order to screw the clamping screw into the draw-in shaft.
  • the offset axially to the threaded portion head portion is used to tighten the feed roller to the feed shaft.
  • the clamping screw which is also referred to in this application as a central clamping screw, may be the only operator-operated clamping element of the connection between the feed shaft and feed roller. Further, separately operated clamping elements are not necessary and preferably not provided. For the operator, it may therefore be sufficient to replace a feed roller to release only the clamping screw to replace the feed roller against another feed roller and fasten the clamping screw or tighten. As a result, the change of feed rollers is greatly simplified and requires little time. For tightening and loosening the clamping screw only a clamping tool is required, which has a portion which fits into the head-side open recess and has a non-round driving profile, which fits the non-round driving profile of the recess.
  • the head portion can be optimized in shape for its other functions.
  • the head portion may be relatively flat, since the reliability of the rotational connection between clamping tool and clamping screw on the shape and depth of the recess can be optimized with non-round driving profile.
  • the head portion of the clamping screw is limited by a circular cylindrical peripheral surface, so that the head portion can be made rotationally symmetrical except for the region of the recess. As a result, a particularly uniform distribution of clamping forces when tightening the clamping screw can be achieved.
  • the recess is formed in preferred embodiments as a hexagon socket recess. This makes it possible to achieve very high torques or torques when tightening the clamping screw by means of commercially available clamping tools with external hexagonal cross-section. Other out of round driving profiles are also possible.
  • the open recess may have an inner square profile, an inner square profile, an inner multi-tooth profile or a slot profile, optionally with crossed slots.
  • the head-side open recess may be so deep that it projects into the region of the threaded portion. As a result, a reliable transmission of large torques is favored.
  • the recess is formed as a passage recess passing 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.
  • an immediate access to the central region of the free end of the feed shaft is created by the continuous passage recess.
  • a grease nipple which serves to supply the lubrication points of the intake shaft with lubricant. The introduction of lubricant through the grease nipple can thus be done with tightened clamping screw.
  • the clamping screw is designed as a flat-head clamping screw, in which a (measured parallel to the axis of the clamping screw) height of the head portion is smaller than a diameter of the threaded portion.
  • a flat head section requires only relatively little space on the side facing away from the feed shaft of the feed roller, so that if necessary, for example, brought a camera or other accessory relatively close to the feed roller and mounted there. This provides, inter alia, the possibility of monitoring their production via a measuring system with camera even with very short springs and possibly controlling it based on measurement results of the camera system.
  • the height of the head portion is less than 50% of the diameter of the threaded portion, whereby the overall shape of the flat head tensioning screw differs significantly from many provided for other purposes clamping screws.
  • the design as a flat-head clamping screw is particularly possible because the clamping screw has the head-side open recess, which is sufficient for applying a clamping tool.
  • a (maximum) diameter of the head portion is at least twice the diameter of the threaded portion.
  • the head portion can thus be relatively wide or expanded in area compared to its height. If required, such a broad head section can be directly clamped, ie in particular without Interposed layer of a washer or the like, rest on the outside of the feed roller and thereby transfer clamping forces on this.
  • the inner side of the head section facing the threaded section can be flat, so that it can bear on a likewise flat outer side of a feed roller over a large area.
  • a radially inner flat recess is provided such that on the inside of the head portion on the outer edge of the head portion encircling, projecting in the direction of the threaded portion support ring is formed. It can thereby be achieved that when tightening the clamping screw, the clamping force is transmitted exclusively via contact surfaces in the region of the radially outer bearing ring, whereby a particularly reliable transmission of the torque or a particularly reliable entrainment is supported.
  • the support ring can be closed in the circumferential direction, but this is not mandatory. It may consist of one or more ring segments, between which there is a gap in the circumferential direction. In general, a plurality of relatively small-area bearing surfaces or bearing zones can be formed distributed over the circumference, e.g. exactly three contact surfaces. As a result, the force distribution can be influenced if necessary.
  • Some embodiments are characterized by a washer, which is arranged in the assembled state of the feed roller at least with an inner portion between the head portion of the clamping screw and the head portion facing side surface or outer surface of the feed roller.
  • a washer it is possible to distribute the clamping force generated by the clamping screw on a large area, which can be achieved a better frictional engagement between the clamping screw and feed roller.
  • the washer can be closed in the circumferential direction, similar to conventional washers, ie have only an inner passage opening for passing the threaded section.
  • Particularly advantageous is a variant of the washer, in which this has a through hole for passing the threaded portion, wherein the passage opening merges on one side in a radially continuous side opening whose inside diameter (measured tangential to the circumferential direction) is greater than an outer diameter of the threaded portion and smaller than is a maximum diameter of the head section.
  • Such a washer can be used or removed without the clamping screw must be completely unscrewed from the feed roller. The clamping screw can thus remain in partially screwed state.
  • a radially inner recess may be provided such that on the inside of a circumferential outer edge of the washer, projecting support ring is formed.
  • the support ring can be continuous in the circumferential direction. Instead, a plurality of circumferentially spaced ring segments or bearing zones may be formed in order to obtain spatially limited contact areas at specific locations. In one variant, exactly three bearing surfaces or bearing zones are present, which effect a three-point bearing.
  • the washer may have a circular or circular outer contour. However, this is not mandatory. Other shapes of the outer contour are possible, e.g. polygonal shapes such as triangle, square or hexagon, possibly with rounded corners.
  • the draw-in shaft has a shaft collar and an adjoining frontal extension for attachment of a feed roller and the feed roller has a central through-hole whose inner diameter is greater than an outer diameter of the extension.
  • the extension When mounting the feed roller this can be plugged onto the extension and advanced to rest on the shaft collar, the extension then engages in the passage opening.
  • the outer diameter of the head portion of the clamping screw may be smaller than the inner diameter of the through hole, so that the roller can be removed without completely loosening the clamping screw.
  • This dimensioning of the head portion is particularly advantageous in conjunction with a laterally open washer, since in this case, the clamping screw only needs to be solved for replacing a feed roller, but not completely unscrewed.
  • the washer can then be removed laterally and the feed roller over the head portion of the screw are pulled outwards.
  • the assembly of another feed roller is then reversed by first the feed roller over the head section the screw is pushed onto the extension before laterally inserting the washer and then tightening the clamping screw.
  • the clamping screw ensures a frictional connection between the feed shaft and feed roller, with some of the above special measures can help to improve the frictional connection, so that a relative rotation between the feed shaft and feed roller is avoided or greatly impeded.
  • the feed rollers are subjected to strong accelerations (increase in the rotational speed) or braking movements (reduction of the rotational speed), possibly in frequent change, so that it can not be ruled out that an exclusively non-positive connection slowly loosens.
  • additional measures for producing a force acting in the circumferential direction positive connection between feed shaft and feed roller are provided.
  • the draw-in shaft has a shaft collar with an end abutment surface for applying the feed roller, wherein on the shaft collar at least one projecting beyond the contact surface eccentric to the axis of rotation seated driving pin is mounted, which is dimensioned for insertion into an eccentric driving bore of the feed roller.
  • a plurality of driving bolts are provided, in particular three driving pins distributed in uniform angular pitch around the central axis.
  • a driving pin relative to the associated driving bore has a slight undersize in the way that the outer diameter of the driving pin is slightly smaller than the inner diameter of the driving bore, so that a small game remains in the radial direction.
  • a clearance compensation device is provided in some embodiments, which can be operated by tightening the clamping screw in such a way that when tightening the clamping screw between the driving pin and the driving hole existing game eliminated becomes.
  • a positive connection in the circumferential direction can be created, so that a gradual release after repeated acceleration and deceleration is avoided.
  • the lash adjuster is operated by tightening the clamping screw, so does not require separate from the clamping screw actuators.
  • This is achieved in that the play compensation device arranged on the driving pin and radially expandable by the action of an axial force clearance compensation element, wherein the play compensation device is dimensioned so that in a relaxed state of the play compensation device (ie, for example, unscrewed or partially dissolved clamping screw) at the Shaft collar adjacent feed roller an actuating portion of the lash adjuster protrudes beyond the shaft collar side surface of the feed roller.
  • the tightening screw is tightened and thereby brought into a tensioned state, so presses the head portion of the clamping screw (or lying between the head portion and feed roller washer) on the actuating portion and exerts the axial force on the lash adjuster from which is radially spread in response and eliminates the play between driving pin and driving bore.
  • a structurally simple and yet effective clearance compensation device in that a resiliently compressible mold element is used as a clearance compensation element, which is compressed via an outer actuating sleeve when the clamping screw is tightened.
  • the molding element may 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 workpiece, in particular a wire or tube, from a supply of material into the region of the forming device.
  • the drawing-in device is a drawing-in device of the type described in this application.
  • the forming machine may in particular be a spring-making machine or another wire-processing machine or a tube-bending machine.
  • FIG Fig. 1 shows elements of a forming machine in the form of a CNC spring coiling machine 100 according to one embodiment.
  • the spring coiling machine 100 has a retraction device 110 which feeds successive wire sections of a wire 115 and guided by a straightening unit wire 115 with numerically controlled feed rate profile in the region of a forming device 120.
  • the wire is converted into a helical spring F by means of numerically controlled tools of the forming device.
  • the tools include u.a. two angularly offset by 90 ° wind pins 122, 124 which are adjustable in 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 the turns of the developing spring. Thus, the slope of the turns can be specified.
  • a numerically controllable cutting tool 150 is mounted, which separates the produced coil spring with a vertical working movement of the supplied wire supply after completion of the forming operations.
  • a severing tool may also be located below the spring, e.g. for springs with different winding sense.
  • the machine axes of the CNC machine belonging to the tools are controlled by a computer numerical control device 180, which has memory devices in which the control software resides, to which i.a. an NC control program for the working movements of the machine axes heard.
  • the wire is advanced starting from the position shown by means of the retraction device 110 in the direction of the wind pins 122, 124 and deflected by the wind pins to the desired diameter to form a circular arc 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 axially displaced under control of the NC control program when the slope is to be changed during spring development.
  • the adjusting movements of the pitch tool essentially determine the gradient along the helical spring.
  • the spring coiling machine is equipped with a camera-based, optical measuring system for the non-contact, real-time acquisition of data on the geometry of a currently produced spring.
  • the measuring system has a CCD-camera 250 mounted on a machine-fixed carrier, which can supply two-dimensional images to a connected image processing system via an interface.
  • the software for image processing is housed in a program module, which cooperates with the control device 180 of the spring coiling machine or is integrated in this.
  • the camera is attached to the side of a wire guide device in the area immediately in front of the retraction device 110 and can be adjusted in position.
  • the machine-near camera 250 is mounted so that its rectangular image field forms part of the developing image Capture spring immediately after leaving the forming tools to determine the spring geometry generated.
  • the intake device 110 ensures the wire feed with a predefined feed rate profile.
  • the collection device pulls the wire from a wire supply, such as a reel, gradually and leads the wire to the forming tools of the forming device.
  • the intake device has two feed roller pairs 112 and 114 connected in series in the direction of passage of the workpiece.
  • Each of the intake roller pairs has two intake rollers, which are arranged with horizontal axes of rotation parallel to each other.
  • the feed rollers are driven in opposite directions by means of a drive to achieve the conveying movement.
  • the feed rollers have profiled circumferential surfaces with circumferential grooves in the circumferential direction, whose shape and size is adapted to the cross section of each workpiece to be conveyed. With the peripheral surfaces, the feed rollers of a pair of feed rollers limit a pull-in gap through which the workpiece is passed.
  • Each of the feed rollers sits at the free end of a feed shaft, which is rotatably mounted with horizontal axis of rotation in the machine frame.
  • Each of the feed rollers is non-rotatably and removably attached by means of a roll tensioning system at the end of the associated feed shaft.
  • the roll tensioning system has several tasks to accomplish. On the one hand, a reliable non-rotatable attachment must be ensured so that the rotational movements of the feed shaft slip-free on the feed roller and the workpiece conveyed thereby can be transmitted. On the other hand, it should be possible for an operator to do a roll change as comfortably and quickly as possible.
  • a roll change is necessary, for example, if the forming machine has to be converted for the use of another type of workpiece, for example a wire with a different diameter. Even if the feed rollers are worn, the work required for the replacement should take as little time as possible. Finally, the roll tensioning system should also be designed so that as little space as possible is required in the area in front of the feed rollers, for example to bring the camera 250 so close to the feed device that its detection area can already grasp the wire immediately after leaving the wire guide, so that even when producing very short springs an observation on the camera is possible.
  • a feed shaft 300 which can be driven by means of the associated drive about an axis of rotation 310 with different directions of rotation and rotational speeds.
  • a Shaft 302 formed, so a diameter extension, which offers a flat contact surface 303 for a feed roller 400 at its front.
  • three eccentric driving pins 320 which are circumferentially offset from each other by 120.degree., Are fastened, which extend axially parallel to the axis of rotation 310 and serve for insertion into a respective driving bore 402 of the draw-in roller.
  • an extension 304 with a cylindrical outer contour projects beyond the shaft collar 302.
  • the flat hole bottom is at the level of the shaft collar 302.
  • the feed shaft carries at its free end the associated feed roller 400.
  • the feed roller 400 is pushed onto the extension 304 and is located on the free front of the shaft collar 302 at.
  • the axial height of the extension 304 is a few tenths of a millimeter less than the (measured in the axial direction) thickness of the feed roller.
  • the feed roller has a profiled peripheral surface 410, in which in the example two circumferential C-shaped grooves are incorporated, whose shape is adapted to the shape of the wire to be conveyed.
  • the feed roller has three axially extending driving holes 402 whose inner diameter are adapted to the outer diameter of the associated driving pins 320, that the driving pins fit into the associated driving holes when placing the feed roller with little lateral play.
  • Each feed roller has a central through hole 406, the inner diameter of the outer diameter of the extension 304 is adapted so that the feed roller sits largely free of play on the extension.
  • the draw-in roller 400 is tensioned onto the pull-in shaft 300 by means of a central tightening screw 500.
  • the clamping screw is centered to the axis of rotation 310 of the feed shaft.
  • the tensioning bolt is the only tensioning element of the roll tensioning system that must be operated by the operator to mount or remove a feed roller from the input shaft.
  • the clamping screw 500 has a threaded portion 520 whose external thread fits into the internal thread of the frontal recess 306 of the feed shaft.
  • a flat head portion 510 is formed, which in the assembled state with its side facing the threaded portion flat inside 512 presses on the flat outer side of the feed roller 400 and thereby the feed roller clamped against the roll collar 302.
  • the head portion has a circular cylindrical outer contour.
  • a recess 530 which is open at the top is formed in the form of a hexagon socket recess.
  • the hexagon socket serves as a non-round driving profile for actuating the clamping screw by means of a correspondingly contoured clamping tool with external hexagonal profile.
  • the recess 530 is designed as a through-passage which is continuous in the axial direction, so that access to the lubricating nipple 380 is possible through the recess, even when the clamping screw is inserted.
  • the head section 510 need not be specially designed for applying a clamping tool.
  • the head section can be optimally adapted to the task of bracing the feed roller with the feed shaft.
  • the head portion may be relatively flat, so that the clamping screw may be formed as a flat-head clamping screw. This makes it possible to approach a camera or other accessory very close to the feed rollers.
  • the height H of the head section (measured parallel to the rotation axis 310) is many times smaller than the outside diameter of the threaded section and in the example is less than 20% of this outside diameter.
  • the diameter of the head portion is significantly larger than the diameter of the threaded portion, for example, at least twice as large.
  • the head portion 510 extends over the driving holes 402 away, so that they are covered with mounted clamping screw from the outside (see. Fig. 5 ).
  • the driving holes are also protected against the ingress of dirt, etc.
  • a radially inward flat recess 513 is formed on the inner side 512 of the head portion facing the threaded portion, which is formed such that an outer support ring 514 is formed, which runs around the outer edge of the head portion and protrudes slightly towards the threaded portion (FIG. see dashed line).
  • a corresponding flat recess 313 can also be provided on the front side or outer side of the shaft collar 302 facing the feed roller (see dashed line). This can be achieved that on the outside of the shaft collar an annular support surface is formed for the feed roller.
  • clamped clamping screw 500 there is a reliable frictional connection or frictional engagement between draw-in shaft with clamping screw on the one hand and on the shaft mounted feed roller on the other.
  • the driving pins 320 can ensure a positive entrainment of the feed roller.
  • the bolts are provided for easier placement and removal of the feed roller against the driving bore with a slight undersize, so that theoretically the possibility of a backlash when changing the direction of rotation is given.
  • a play compensation device 360 is provided in each case in the region of the connection between driving pins 320 and driving bore 402 (cf. Fig. 4 ), which is automatically actuated when tightening the clamping screw on the head portion 510 and eliminates any residual play between driving pin and driving bore.
  • the stud bolt 320 formed as a stud has close to the shaft collar a cylindrical first portion 312, whose outer diameter is only slightly smaller than the inner diameter of the driving bore, and an adjoining front portion 314 with a smaller diameter.
  • a mold element in the form of an O-ring 362 is pushed and rests on the inner cylindrical portion 312.
  • an actuating sleeve 364 is placed, the secured against loss on the front portion 314 and is seated with its shaft facing the front side facing the O-ring.
  • the length of the sleeve is dimensioned so that its sleeve head in the relaxed state (for example, not yet mounted clamping screw) protrudes slightly beyond the flat outer side 414 of the feed roller.
  • the roll tensioning system can be used with the same feed shafts and the same feed rollers as the first embodiment. Therefore, these components carry the same reference numerals as in the first embodiment and with respect to their configuration, reference is made to the description there.
  • the roll tensioning system includes a tightening screw 600 with head portion 610, threaded portion 620, and central hexagon socket receiving aperture 630 for a tightening tool.
  • a washer 700 is provided which, in the installed state of the feed roller, lies at least with an inner section 710 between the head section 610 of the clamping screw and a side surface (flat outer surface) of the feed roller facing the head section. The power flow between the clamping screw and the feed roller is guided through the washer.
  • the washer is not closed in the circumferential direction, but designed substantially crescent-shaped or C-shaped with a lateral opening.
  • a through opening 725 the inner diameter of which is slightly larger than the outer diameter of the threaded portion of the clamping screw, passes over on one side into a radially continuous side opening 727.
  • the measured between the ends of the free legs of the washer clear width 728 of this side opening is slightly larger than the outer diameter of the threaded portion of the clamping screw and in the example corresponds to twice the radius of curvature of the circular shaped part of the through hole.
  • the inner portion 710 of the washer adjoining the throughbore is somewhat shallower than the thicker or more massive outer portion 720, which, with its inner contour when the clamping screw is mounted, directly adjoins the outer contour of the head portion.
  • 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 of the feed roller facing circumferential support ring 714 results in the area of the clamping force of the clamping screw is transferred to the feed roller.
  • the outer diameter of the washer can be chosen so that there is a sufficiently large contact surface for transmitting a frictional engagement or a large radial distance of the support ring to the center, in order to effect an effective frictional engagement. Since using a washer, the head portion 610 of the clamping screw 600 is no longer required for direct power transmission to the feed roller, the diameter of the head portion may be substantially smaller than in the other embodiment. As in Fig. 6 can be clearly seen, the outer diameter D of the head portion 610 is slightly smaller than the inner diameter of the central through hole 406 of the feed roller. This makes it possible to set up or remove the feed roller without completely loosening the clamping screw 600 and remove 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 Fig. 6 to 8 a lateral passage opening is provided, so that the washer can be inserted or removed with screwed clamping screw.
  • Fig. 11 shows in Fig. 11A a plan view of one and in Fig. 11B a section through a washer 1100.
  • a flat, radially inner recess 1113 is formed on the inner side of the washer 1100 facing the feed roller, so that a bearing ring facing the feed roller results in the outer region, in the region of which the clamping force of the clamping screw is transferred 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)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Forwarding And Storing Of Filamentary Material (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Massaging Devices (AREA)
  • Threshing Machine Elements (AREA)
  • Press Drives And Press Lines (AREA)
EP16166657.3A 2015-05-06 2016-04-22 Dispositif d'insertion pour banc de formage Active EP3093079B1 (fr)

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

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015208346.2A DE102015208346B4 (de) 2015-05-06 2015-05-06 Einzugseinrichtung für Umformmaschine

Publications (2)

Publication Number Publication Date
EP3093079A1 true EP3093079A1 (fr) 2016-11-16
EP3093079B1 EP3093079B1 (fr) 2019-12-25

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EP16166657.3A Active EP3093079B1 (fr) 2015-05-06 2016-04-22 Dispositif d'insertion pour banc de formage

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EP (1) EP3093079B1 (fr)
JP (1) JP6231612B2 (fr)
CN (1) CN106111855B (fr)
DE (1) DE102015208346B4 (fr)
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WO2018202612A1 (fr) * 2017-05-05 2018-11-08 Wafios Aktiengesellschaft Procédé de fabrication d'une pièce pliée et machine de pliage pour la mise en œuvre du procédé

Families Citing this family (2)

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Publication number Priority date Publication date Assignee Title
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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JPS58128244A (ja) * 1982-01-27 1983-07-30 Sakamura Kikai Seisakusho:Kk 送りロ−ルワンタツチ交換装置
DE4229294C1 (de) * 1992-09-02 1993-12-16 Wafios Maschinen Wagner Vorrichtung zum Formen von Draht
GB2289251A (en) * 1994-05-12 1995-11-15 Rockford Mfg Group Apparatus for feeding wire
JP2004082198A (ja) * 2002-08-29 2004-03-18 Asahi-Seiki Mfg Co Ltd ばね成形機の線材送り装置

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JPH0723070Y2 (ja) * 1989-11-13 1995-05-31 大和製罐株式会社 缶蓋巻締機のリフター圧力調節装置
JP2631265B2 (ja) * 1994-01-26 1997-07-16 太陽製罐株式会社 シーミングローラの支持装置
DE19542895B4 (de) * 1995-11-17 2005-05-25 Innotec Forschungs- Und Entwicklungs-Gmbh Draht- und Bandeinzugseinrichtung
JP2004025246A (ja) * 2002-06-26 2004-01-29 Nhk Spring Co Ltd 真直な傾斜軸線を有するコイルばねの製造方法
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DE750142C (fr) *
JPS58128244A (ja) * 1982-01-27 1983-07-30 Sakamura Kikai Seisakusho:Kk 送りロ−ルワンタツチ交換装置
DE4229294C1 (de) * 1992-09-02 1993-12-16 Wafios Maschinen Wagner Vorrichtung zum Formen von Draht
GB2289251A (en) * 1994-05-12 1995-11-15 Rockford Mfg Group Apparatus for feeding wire
JP2004082198A (ja) * 2002-08-29 2004-03-18 Asahi-Seiki Mfg Co Ltd ばね成形機の線材送り装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018202612A1 (fr) * 2017-05-05 2018-11-08 Wafios Aktiengesellschaft Procédé de fabrication d'une pièce pliée et machine de pliage pour la mise en œuvre du procédé

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DE102015208346B4 (de) 2017-02-23
JP6231612B2 (ja) 2017-11-15
HRP20200389T1 (hr) 2020-06-12
EP3093079B1 (fr) 2019-12-25
JP2016209932A (ja) 2016-12-15
DE102015208346A1 (de) 2016-11-10
CN106111855B (zh) 2019-03-19
CN106111855A (zh) 2016-11-16

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