EP3194091B1 - Procédé de fabrication d'un ressort à ruban et dispositif de pliage pour sa fabrication - Google Patents

Procédé de fabrication d'un ressort à ruban et dispositif de pliage pour sa fabrication Download PDF

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Publication number
EP3194091B1
EP3194091B1 EP15747446.1A EP15747446A EP3194091B1 EP 3194091 B1 EP3194091 B1 EP 3194091B1 EP 15747446 A EP15747446 A EP 15747446A EP 3194091 B1 EP3194091 B1 EP 3194091B1
Authority
EP
European Patent Office
Prior art keywords
drum
band
shaped material
contact surface
segment
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.)
Not-in-force
Application number
EP15747446.1A
Other languages
German (de)
English (en)
Other versions
EP3194091A1 (fr
Inventor
Kurt NAUE
Andy Haunholter
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.)
Adolf Schnorr Co KG GmbH
Adolf Schnorr GmbH and Co KG
Original Assignee
Adolf Schnorr Co KG GmbH
Adolf Schnorr GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Adolf Schnorr Co KG GmbH, Adolf Schnorr GmbH and Co KG filed Critical Adolf Schnorr Co KG GmbH
Publication of EP3194091A1 publication Critical patent/EP3194091A1/fr
Application granted granted Critical
Publication of EP3194091B1 publication Critical patent/EP3194091B1/fr
Not-in-force 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
    • B21F35/00—Making springs from wire
    • B21F35/04—Making flat springs, e.g. sinus springs
    • 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
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/10—Bending specially adapted to produce specific articles, e.g. leaf springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/14—Bending sheet metal along straight lines, e.g. to form simple curves by passing between rollers
    • B21D5/143—Bending sheet metal along straight lines, e.g. to form simple curves by passing between rollers making use of a mandrel
    • 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
    • B21D53/00—Making other particular articles
    • B21D53/16—Making other particular articles rings, e.g. barrel hoops
    • 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
    • B21D53/00—Making other particular articles
    • B21D53/84—Making other particular articles other parts for engines, e.g. connecting-rods
    • 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
    • B21D53/00—Making other particular articles
    • B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
    • B21D53/886—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards leaf springs
    • 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
    • B21F3/04—Coiling wire into particular forms helically externally on a mandrel or the like
    • 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
    • B21F3/08—Coiling wire into particular forms to flat spiral
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F37/00—Manufacture of rings from wire
    • B21F37/04—Manufacture of rings from wire of washers

Definitions

  • the invention relates to a method for producing a band spring, in particular a spring plate for covering a cooling space of a piston of internal combustion engines, which is designed as at least one annular disk-shaped segment and a bending device for their production.
  • a bending device through which a spiral-shaped corrugated spring is produced from a wire-shaped material.
  • the wire-shaped material is bent in an annular disk-like manner, with a drum engaging on the inside of the wire-shaped material and two deflecting devices arranged at a distance from one another being provided at 90 ° apart from the wire-shaped material. Furthermore, offset by another 90 ° offset on the outer circumference further bending devices to align the wire-shaped material wave-shaped.
  • the inner drum and the outer ones Deflection devices are of the same size in diameter, wherein their distance from one another determines the bending radius of the wire-shaped material.
  • This arrangement has the disadvantage that the wire-shaped material has to be of high quality, ie very homogeneous, in order to achieve sufficient bending and alignment of the wire-shaped material.
  • the JP S55 75818 A which forms the basis for the preamble of claims 1 and 14, discloses a bending device for producing an annular disc-shaped element, in which a band-shaped material is clamped by a clamping claw on a spiral guide plate and then bent helically around a drum. Following this bending process, the helix is cut into individual ring-shaped segments.
  • From the DE 17 52 683 B1 shows a bending device for producing helical rings from a wire, in which a trapezoidal in cross-section wire is guided within a helical bending channel around a mandrel and bent helically.
  • the bending channel is formed by a groove on the mandrel and a bending ring bounding the outer periphery of the bending channel, so that the wire is guided completely in the circumferential groove during the bending operation.
  • the US 3 729 968 A discloses a bending device in which a band-shaped material is bent by a die helically around a rotatable mandrel.
  • the die on a spiral-shaped guide channel for the band-shaped material, wherein an end portion of the band-shaped material is clamped in a retaining slot on a rotatable drive ring, so that the band-shaped material by rotation of the drive ring and an axial movement of the mandrel spirally bent around the mandrel or is pulled.
  • WO 2006/018313 A1 is a bending device for producing an annular disc-shaped element, in which the deflection of the band-shaped material is effected by a disc-shaped guide plate.
  • the guide plate has a depression which is delimited by a radial circumferential wall. Through this will be the band-shaped material is bent in a circle around a mandrel during a rotation of the plate.
  • the US 3,608,347 A discloses a bending device for producing annular disk-shaped elements for flanges of pipes.
  • This bending device has a central drum-shaped support element and a plurality of supporting elements arranged thereon.
  • a band-shaped material is bent around the central support element, in that the support elements assigned to the central support element form a radial guide for the band-shaped material.
  • the formed strip-shaped material is cut into individual ring-shaped segments.
  • the invention has for its object to provide a method for producing a band spring, which is designed as an annular disc-shaped segment and allows dimensionally accurate production of the segments and a reduction of the crop.
  • the band-shaped material By feeding a band-shaped material into a circumferential groove in a drum having a contact surface, and the abutment surface in the drum is oriented at an angle to the longitudinal axis of the drum, so that upon bending and simultaneously setting up the band-shaped material, an inner side wall of the band-shaped material comes to flat contact with the contact surface, or the band-shaped material is fed to a two-part drum with a lower part and a top, wherein on the lower part a shoulder is incorporated as part of a circumferential groove, and a second part of the groove formed by a contact surface of the upper part is, and the upper part is positioned at an angle to the lower part, wherein an axis of rotation of the upper part is arranged at a different angle to the axis of rotation of the lower part.
  • Such a manufacturing method uses the entire web width of the band-shaped material for the production of annular disk-shaped segments. By cutting the bent strip-shaped material to a circumferential angle of the segments is determined. For the production of such annular disk-shaped segments, the thickness of the strip-shaped material determining side wall is guided along the contact surface on the lateral surface of the drum and bent by means of at least one deflection of a running in the transport direction or in the X direction of the strip-shaped material rectilinear portion.
  • This bending which takes place about the vertical axis or Z-axis of the band-shaped material, furthermore has the advantage that the rolling direction of the band-shaped material extends along the annular disk-shaped segment, whereby also improved spring properties and increased strength are achieved.
  • an upper or lower side or both sides of the band-shaped material for aligning the band-shaped material during the bending process along the contact surface of the lateral surface of the drum are guided and aligned by at least one guide element.
  • the at least one guide element By the at least one guide element, a deflection of the material can be prevented during the bending of the strip-shaped material about the Z-axis and a forced guidance of the strip-like material along the drum for introducing the bending radius.
  • the at least one guide element is aligned at right angles to the axis of rotation of the drum or extends in a plane perpendicular to the axis of rotation. As a result, only a bending of the band-shaped material about the Z-axis takes place. The diameter of the drum determines the bending radius of the band-shaped material about the Z-axis.
  • the at least one guide element is aligned with its guide surfaces inclined relative to an XY plane, the is aligned perpendicular to the axis of rotation or Z-axis of the drum to allow during the bending process of the strip-shaped material to an annular disk-shaped segment at the same time setting up the annular disk-shaped segment. This allows two process steps - the bending and the erection of the ringusionnfömigen segment - carried out simultaneously.
  • the band-shaped material is cut to form the segment depending on the required circumferential angle of the band spring.
  • This circumferential or wrap angle can be determined as a function of the number of individual segments of band springs for the application. For example, wrapping angles of about 180 ° can be provided when using two segments of the band spring. Likewise, wrapping angles of at least 60 ° can also be provided. For example, the wrap angle at 120 ° when using, for example, three mutually associated band spring segments. In some cases, wrap angles of greater than 180 ° and a further wrap angle of less than 180 ° can also be formed, which is preferably complementary to the segment with a wrap angle greater than 180 °.
  • An alternative embodiment of the method provides that the band-shaped material is wound several times around the drum and produced as a spiral.
  • the individual segments can be cut from the spiral either after the spiral has been completely removed from the drum or when the spiral is released from the lateral surface of the drum.
  • a first embodiment of the method provides that the drum has a bearing surface lying in the lateral surface.
  • This is the simplest embodiment of the bending device and allows the side wall of the band-shaped material to roll on the lateral surface or support during the bending process and forcibly bending the band-shaped material during the bending process by at least one guide element and at least one deflecting element to the drum becomes.
  • the contact surface is introduced into the lateral surface of the drum of the bending device and recessed and preferably provided a circumferential groove in which an edge of the band-shaped material adjacent to the side wall of the strip material is guided during the bending operation.
  • This circumferential groove can be provided both in an orientation of the band-shaped material to the drum in an XY plane perpendicular to the Z-plane or axis of rotation of the drum and in a plane inclined relative to the XY plane.
  • the contact surface of the groove is adjusted and aligned at the installation angle of the strip-shaped material for the production of the segment, so that the side surface can be supported on the base of the groove.
  • the bent and erected from the band-shaped material segment is introduced into at least one punching tool, in which a contour, in particular a final contour of the segment, is punched out.
  • a Planthermal tool is provided to reduce the handling of the individual segments and to maintain an exact positioning of the segments in the tool.
  • a punching tool it is preferable to carry out both a flat back and a simultaneous punching into a final contour.
  • the contoured segment can be cured in the event that the band-shaped material is provided as a so-called soft band.
  • the band-shaped material consists of a tempered material
  • Such surface treatments may be, for example, oils, phosphates or the like.
  • a material which is rectangular in cross-section or trapezoidal, in particular slightly trapezoidal, is preferably supplied.
  • the band-shaped material is preferably set at a ratio of a width to a thickness equal to or greater than 3. As a result, no compressions can occur during the bending process at the inner diameter and no cracks at the outer diameter.
  • a bending device for producing a band spring which is at least designed as annular disc-shaped segment, in particular for carrying out the method described above, wherein a drum recessed with a contact surface is provided opposite the lateral surface for a narrow side of the band-shaped material and at least one deflection device, which is adjustable at a distance from the drum, wherein the distance corresponds to the width of the band-shaped material and the contact surface of the drum has a radius which corresponds substantially to the inner radius of an annular disc-shaped segment to be bent, dissolved, with a circumferential groove is provided in the drum, which has a bearing surface, and the contact surface is aligned in the drum at an angle to the longitudinal axis of the drum, so that when bending and simultaneously setting up the band-shaped material in nere side wall of the band-shaped material for planar contact with the contact surface comes, or the drum is formed in two parts with an upper part and a lower part and on the lower part a shoulder is incorporated as part of
  • This bending device has the advantage that the curved, band-shaped material is guided with its inner narrow side along the drum, whereby a more precise introduction of the radius is made possible. Due to the at least one deflection device which is associated with the drum, a guidance of the strip-shaped material along the drum is made possible even with increasing wrap angle of the strip-shaped material. As a result, a widening of the curved band-shaped material is prevented.
  • the drum can be formed as a cylindrical body.
  • the contact surface can be recessed with respect to the lateral surface of the drum and preferably a peripheral groove can be formed in the lateral surface.
  • the depth of the groove in the drum is adapted to the width of the band-shaped material, wherein at least 50% of the width of the band-shaped material is received in the groove.
  • FIG. 1a is a schematic view from above of two band springs 11, which are each formed as an annular disk-shaped segment 12.
  • the two band springs 11 may form an annular disc in their arrangement to each other, for example can be used as a cover of a cooling oil groove on a piston for internal combustion engines.
  • the respective ends of the band springs 11 can form a gap in the arrangement in the cooling oil channel to allow an addition or discharge of the cooling liquid or an oil.
  • FIG. 1b is a schematic sectional view taken along the line II in FIG. 1a which shows that the segments 12 are set up in the exemplary embodiment.
  • These segments 12 are preferably formed annular disk-shaped.
  • the wrap angle of the segments 12 is dependent on the number of segments to be used and the areas to be covered.
  • the segments 12 may have specifically shaped end portions 16 which are adapted to the installation situation to lie flush against each other or to form a gap of predefined width.
  • these on the outer or inner diameter correspondingly adapted contours or within the segment surface, for example, have holes 17 or other entries, punched holes, contours or the like.
  • the segment 12 has an upper side 18 and a lower side 19. These are bounded on the inner diameter 14 by an inner side wall 20 and on the outer diameter 15 by an outer side wall 21.
  • These segments 12 are preferably made of a band-shaped material 23, which has an example in FIG. 2a illustrated rectangular cross-section comprises.
  • Such band-shaped materials are preferably produced by rolling. It is provided that a width b comprises a multiple of a thickness or height h. At least the ratio b / h ⁇ 5, in particular b / h ⁇ 10.
  • the band-shaped material 23 may be formed as a roll or in the form of individual strips. To simplify the following explanations, reference is made to the US Pat FIG. 2a represented coordinate system reference taken, wherein the orientation of the coordinates may be different from the illustrated spatial directions.
  • FIG. 2b an alternative embodiment of a cross section for a band-shaped material 23 is shown, which as well as the in FIG. 2a shown material - can find use.
  • this cross section this is only slightly trapezoidal, so that an inner side 20 is thinner than the outer side 21 is formed.
  • a bending device 27 is provided, which in a plan view and in individual steps in the Figures 2c, 2d and 2e in a side view as well as in FIG. 3 is shown.
  • the bending device 27 comprises a drum 29 which is rotatably driven about a preferably fixed axis of rotation 31. This axis of rotation 31 may be aligned in the Z direction. Spaced apart from the drum 29, at least one deflecting device 32 is provided, which is designed, for example, as a roller or roller and is preferably also rotatable about a rotation axis parallel to the axis of rotation 31.
  • the bending device 27 further comprises at least one guide element 33 with at least one sliding surface 34, which serves to guide and align the strip-shaped material 23 to the contact surface 37 of a lateral surface 36 of the drum 29.
  • the guide element 33 may have fixed sliding surfaces 34.
  • the sliding surfaces 34 may also be formed by rollers or rollers that are rotatable or circumferential.
  • a first method step according to Figure 2c the strip-shaped material 23 is tangentially fed to a lateral surface 36 of the drum 29.
  • An inner side wall 20 comes to rest against the contact surface 37 of the lateral surface 36 of the drum 29.
  • the upper and lower sides 18, 19 of the band-shaped material 23 are aligned perpendicular to the axis of rotation 31.
  • the axis of rotation 31 may be the Z axis, but also aligned in an XY plane his.
  • the drum 29 may preferably be rotatably driven by a drive.
  • the band-shaped material 23 is further promoted according to arrow A, so that it is bent over the deflecting device 32 about its vertical axis or Z-axis and the inner side wall 20 continues to come to rest on the lateral surface 36.
  • the inner side wall 20 is thereby compressed, and an outer side wall 21 is thereby stretched.
  • the radius of curvature or bending radius of the segment 21 is dependent on the material, the thickness and / or the width of the band-shaped material.
  • a guide member 33 is provided so that the band-shaped material, as for example in FIG.
  • a cut is made in the region of the feed of the strip-shaped material 23 to the drum 29 in order to cut the segment 12.
  • the length of the band-shaped material 23 may be predetermined, so that individual strips of the band-shaped material 23 are supplied to the predetermined length of the bending device 27 and a separation of the segment 23 may be omitted from the band-shaped material.
  • a further alternative embodiment provides that a band-shaped material 23 is supplied and the band material bent around the drum 29 forms helically or helically around the drum 29 and is discharged upward or downward, so that either when taking out the spiral relative to the lateral surface 36, a cutting operation takes place or after the complete removal of the spiral from the drum 29, the segments 12 are cut.
  • this first embodiment of the drum 29 of the bending device 27 has a flat, or smooth outer surface 36 and the contact surface 37 is located in the lateral surface 36, as shown in FIG. 3 is shown.
  • a contact surface 37 determining radius R of the drum 29 corresponds to an inner radius r i of the segment 12, as shown for example in the FIGS. 2e and 1a is shown.
  • the radius R of the lateral surface 36 corresponds to the radius of the abutment surface 37.
  • FIG. 4 An alternative embodiment of the drum 29 of the bending device 27 is shown in FIG FIG. 4 shown.
  • the abutment surface 37 is introduced and thereby forms, for example, a circumferential groove 38, which is preferably adapted in the width of the height h of the band-shaped material to be processed 23, so that this band-shaped material 23 with the inner side wall 20 in this groove 38th held and caught in the edge region of the top 18 and bottom 19 of the segment 12.
  • the depth of the groove 38 is preferably dimensioned in this embodiment such that only a narrow edge region of the top and bottom 18, 19 engages in the groove 38.
  • the depth of the groove 38 is formed by the radius of the contact surface 37, which in turn corresponds to the inner radius r i of the segment 12 to be produced.
  • the groove 38 can also be formed such that the wall sections formed between the lateral surface 36 and the abutment surface 37 are also formed flat V-shaped or greatly expand starting from the abutment surface 37 to the lateral surface 3, so that, for example, no guide function the top and bottom 18, 19 of the strip-shaped material 23 is given.
  • FIG. 5 is an alternative embodiment to FIG. 4 shown.
  • the contact surface 37 of the drum 29 in this case has a depth which is at least over half the width of the strip-shaped material 23rd extends.
  • a groove 38 is formed whose width corresponds to the material thickness of the material 23 or is slightly larger.
  • the guide elements 33 can be omitted, since due to the depth of the groove 38, the groove-forming edge portions form the guide elements 33. Only by the deflection device 32, the band-shaped material is held in the groove 38 of the lateral surface 36.
  • FIG. 6 a further alternative embodiment of the drum 29 of the bending device 37 is shown.
  • the lower part 41 has a shoulder 44 on which the abutment surface 37 is provided, the shoulder 44 together with the upper part 42 again forming the groove 38.
  • This embodiment has the advantage that, depending on the setting of the distance of a contact surface 43 on the upper part 42 to the lower part 41, the width of the groove 38 is variable.
  • This alternative embodiment according to FIG. 6 may also include a groove 38, which in FIG. 4 is shown and described.
  • FIG. 7 a further alternative embodiment of the bending device 27 is shown, this embodiment in the construction of the two-piece drum 29 according to FIG. 6 equivalent.
  • the axis of rotation 31 of the upper part 42 is arranged at a different angle to that of the lower part 41.
  • the upper part 42 and the lower part 41 are rotatably connected to each other by a universal joint.
  • the upper part 42 is variable at a distance from the lower part 41 for adjusting the groove width.
  • the upper part 42 is arranged at an angle to the lower part 41, wherein a contact surface 46 is formed on the outer edge of the upper part and engages the band-shaped material 23 and this holds down to the support surface or the support surface on the shoulder 44.
  • the guide element 33 can be dispensed with.
  • a simple threading of the band-shaped material 23 into the groove 38, which in the region of the inclined to each other Sections of the upper part 42 and the lower part 41 is formed. Characterized in that the upper part 42 and the lower part 41 rotationally fixed and aligned at an angle to each other, this threading can be facilitated and achieved.
  • one or more baffles 32 may be provided as in the previously described embodiments to effect the bending of the belt 23 around the Z axis.
  • a segment 12 is produced, which is designed as a planar element. To take a form, as in FIG. 1b is shown, it is necessary that these segments 12 are then inserted into a tool and set up by a pressing or bending operation. In a subsequent or in a preceding step, a contour in the segments 12 is introduced by a punch, such as the end portions 16 and / or holes 17 or the like. After setting up the segment 12 is in a further tool a Planduct for setting the segment 12. Unless previously no contour or final contour was introduced into the segment 12, after setting up the segment, both the final contour and the PlanN in one step a punching and setting tool are introduced.
  • tempered or tempered and surface treatment and / or surface coating for the completion of the segment can be carried out as a strip-shaped material 23 in a tempered material. If a soft band is used as the starting material for the band-shaped material 23, hardening takes place after setting up / punching and, subsequently, tempering and optionally a surface treatment.
  • FIG. 8 is an alternative embodiment of the bending device 27 to FIG. 7 shown.
  • the abutment surface 43 is inclined on the shoulder 44 of the lower part 41 and the contact surface 46 or contact surface of the upper part 42 or the angular orientation of the upper part 42 to the lower part 41 adapted thereto. This can help in the formation of a annular disk-shaped segment 12 at the same time a setting up of the annular disk-shaped segment 12 can be achieved, so that in comparison to the above under FIG. 7 described method can be saved one step.
  • FIG. 9 an alternative embodiment of the drum 29 of the bending device 27 is shown, which allows an alternative method for producing the band spring 11.
  • the supply of the strip-shaped material 23 according to Figure 2c also takes place in the drum 29 according to FIG. 8 , Also the further steps described in the Figures 2d and 2e such as FIG. 3 take place in this embodiment, wherein in the steps according to the Figures 2d and 2e in a drum 29 according to FIG. 8 at the same time for setting up the strip-shaped material 23 about the Z-axis, a setting up of the strip-shaped material 23 is achieved.
  • the at least one guide element 33 with its sliding surfaces 34 is not aligned at right angles to the axis of rotation 31, but at an angle thereto, which is determined by the degree of desired placement of the segment 12, ie by the distance of the height of the inner diameter 14 relative to a support surface of the outer diameter 15.
  • a circumferential groove 38 is introduced to allow a secure support and guidance of the inner side wall 20 of the band-shaped material 23.
  • the groove 38 preferably has a base surface 49, which allows the inner side surface 20 preferably rests flat against the base surface 49 and is supported thereon. This base 49 is thus inclined relative to the parallel orientation to the axis of rotation by the angle by which the sliding surfaces 34 are inclined relative to a perpendicular orientation to the axis of rotation.
  • drum 29 may also be formed in two parts with a lower part 41 and an upper part 42, wherein the parting plane analogous to that in FIG. 6 can lie.
  • FIG. 10 an alternative embodiment of a drum 29 is shown.
  • This drum 29 has in the lateral surface 36 a contact surface 37, which is aligned parallel to the longitudinal axis and extending in a plane perpendicular to the longitudinal axis of the drum 29. Based on this, the contact surface 37 spirals upwards.
  • a band spring can be made with several turns as a spiral belt spring. Once the topmost turn leaves the drum 29, it can be cut off. In this case, the cut can also be made only after the lead out of the desired number of turns with respect to the top of the drum 29.
  • the waste in the production of the segments 12 for the strip spring 11 is considerably minimized, since the entire bandwidth is used to form the segment 12 and thus a considerable cost savings is associated.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Springs (AREA)
  • Wire Processing (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Claims (15)

  1. Procédé servant à fabriquer un ressort à ruban, en particulier une tôle élastique à ressorts destinée à recouvrir une chambre de refroidissement d'un piston de moteurs à combustion interne, lequel est réalisé au moins en tant que segment (12) en forme de disque annulaire, procédé lors duquel
    - un matériau (23) en forme de bande est amené à un dispositif de pliage (27) qui comprend au moins un tambour (29) qui tourne autour d'un axe de rotation (31),
    - le matériau (23) en forme de bande est amené dans une orientation tangentielle par rapport à la surface latérale (36) du tambour (29) de telle sorte qu'une paroi latérale (20) qui définit l'épaisseur du matériau (23) en forme de bande repose au moins partiellement contre une surface d'appui (37) située sur la surface latérale (36) du tambour (29),
    - la surface d'appui (37) du tambour (29) comprend un rayon qui correspond essentiellement à un rayon intérieur du matériau (23) en forme de bande qui doit être plié pour former le segment (12) et
    - au moins un dispositif de déviation (32) est orienté selon un espacement donné par rapport au tambour (29) de telle sorte que le matériau (23) en forme de bande est soumis à un guidage forcé entre le tambour (29) et le dispositif de déviation (32) grâce auquel le matériau (23) en forme de bande est cintré en suivant le tambour (29),
    caractérisé en ce que
    - le matériau (23) en forme de bande est amené à une rainure circonférentielle (38) ménagée dans le tambour (29) et présentant la surface d'appui (37), et en ce que la surface d'appui (37) ménagée dans le tambour (29) est orientée selon un angle tel par rapport à l'axe longitudinal (31) dudit tambour (27) que, lors du cintrage et du redressement simultané du matériau (23) en forme de bande, la paroi latérale intérieure (20) du matériau (23) en forme de bande vient prendre appui avec toute sa surface contre la surface d'appui (37), ou
    - le matériau (23) en forme de bande est amené à un tambour (29) constitué en deux parties, à savoir une partie inférieure (41) et une partie supérieure (42), un épaulement (44) étant réalisé en tant que partie d'une rainure circonférentielle (38) sur la partie inférieure (41) et une deuxième partie de la rainure (38) étant formée par une surface d'appui (46) de la partie supérieure (42), et en ce que la partie supérieure (42) est positionnée selon un angle donné par rapport à la partie inférieure (41), un axe de rotation (31) de la partie supérieure (42) étant disposé selon un angle différent de celui de l'axe de rotation (31) de la partie inférieure (41).
  2. Procédé selon la revendication 1, caractérisé en ce qu'une face supérieure (18), une face inférieure (19) ou les deux faces (18, 19) du matériau (23) en forme de bande sont, en vue de l'orientation radiale dudit matériau (23) en forme de bande par rapport à la surface d'appui (37) du tambour (29), guidées et orientées au moins par un élément de guidage (33).
  3. Procédé selon la revendication 1, caractérisé en ce que le matériau (23) en forme de bande est coupé au niveau du tambour (29), et ce après avoir été cintré conformément à un angle inscrit prédéterminé de la surface d'appui (37) du tambour (29) en vue de former le segment (12) en forme de disque annulaire.
  4. Procédé selon la revendication 1, caractérisé en ce que le matériau (23) en forme de bande est enroulé plusieurs fois autour du tambour (29) et est fabriqué en tant que spirale, puis la spirale est coupée en segments (12) de préférence après avoir quittée le tambour (29).
  5. Procédé selon la revendication 1, caractérisé en ce que le matériau (23) en forme de bande est amené au tambour (29) présentant une surface d'appui (37) située dans la surface latérale (36).
  6. Procédé selon la revendication 1, caractérisé en ce que le matériau (23) en forme de bande est amené au tambour (29) présentant une surface d'appui (37) disposée à un niveau surbaissé par rapport à la surface latérale (23), en particulier dans une rainure circonférentielle (38) ménagée dans la surface d'appui (37) disposée dans la surface latérale (36).
  7. Procédé selon la revendication 6, caractérisé en ce que la surface d'appui (37) est orientée selon un angle inférieur à 45° par rapport à l'axe longitudinal (31) du tambour (29).
  8. Procédé selon la revendication 3, caractérisé en ce que ledit au moins un segment (12) du matériau (23) en forme de bande est inséré dans un outil et redressé.
  9. Procédé selon la revendication 1 ou 8, caractérisé en ce que le segment (12) obtenu par cintrage du matériau (23) en forme de bande et de préférence redressé est inséré dans au moins un outil à découper et un contour final du segment (12) est découpé, puis le segment (12) redressé est pressé à plat dans un autre outil ou vice versa, ou les deux opérations sont réalisées simultanément dans l'outil à découper.
  10. Procédé selon la revendication 9, caractérisé en ce que le segment (12), après avoir été coupé selon le contour final voulu, est durci.
  11. Procédé selon la revendication 9, caractérisé en ce que le segment (12), après avoir été coupé selon le contour final voulu, est trempé et/ou est soumis de préférence à un traitement de surface ou à un revêtement de surface.
  12. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un matériau en bande (23) de section transversale rectangulaire ou trapézoïdale est amené au dispositif de pliage (27).
  13. Procédé selon la revendication 1, caractérisé en ce que le matériau en bande (23) utilisé présente un rapport épaisseur/largeur égal ou supérieur à 3.
  14. Dispositif de pliage servant à fabriquer un ressort à ruban réalisé en tant que segment (12) en forme de disque annulaire, servant en particulier à réaliser le procédé selon l'une quelconque des revendications 1 à 13, dans lequel est prévu un tambour (29) lequel présente une surface d'appui (37) surbaissée par rapport à la surface latérale (36) et destinée à recevoir une face étroite intérieure (20) du matériau (23) en forme de bande et auquel est affecté au moins un dispositif de déviation (32) dont l'espacement par rapport au tambour (29) peut être réglé de manière à correspondre à la largeur du matériau (23) en forme de bande, la surface d'appui (37) du tambour (29) présentant un rayon qui correspond essentiellement au rayon intérieur d'un segment (12) qui doit être plié, caractérisé en ce que
    - une rainure circonférentielle (38) est prévue dans le tambour (29) et présente la surface d'appui (37) et que ladite surface d'appui (37) du tambour (29) est orientée selon un angle tel par rapport à l'axe longitudinal (31) du tambour (27) que, lors du cintrage et du redressement simultané du matériau (23) en forme de bande, la paroi latérale intérieure (20) du matériau (23) en forme de bande vient prendre appui avec toute sa surface contre la surface d'appui (37), ou
    - le tambour (29) est réalisé en deux parties, à savoir une partie inférieure (41) et une partie supérieure (42), un épaulement (44) étant ménagé dans la partie inférieure (41) en tant que partie d'une rainure circonférentielle (38) et une deuxième partie de la rainure (38) étant formée par une surface d'appui (46) de la partie supérieure (42), et en ce que la partie supérieure (42) est positionnée selon un angle donné par rapport à la partie inférieure (41), un axe de rotation (31) de la partie supérieure (42) étant disposé selon un angle différent de celui de l'axe de rotation (31) de la partie inférieure (41).
  15. Dispositif de pliage selon la revendication 14, caractérisé en ce que la profondeur de la rainure (38) est adaptée à la largeur du matériau (23) en forme de bande de telle sorte qu'au moins 50 % de la largeur du matériau (23) en forme de bande rentre dans la rainure
EP15747446.1A 2014-08-04 2015-07-31 Procédé de fabrication d'un ressort à ruban et dispositif de pliage pour sa fabrication Not-in-force EP3194091B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014111015.3A DE102014111015A1 (de) 2014-08-04 2014-08-04 Verfahren zur Herstellung einer Bandfeder sowie Biegeeinrichtung zu deren Herstellung
PCT/EP2015/067712 WO2016020294A1 (fr) 2014-08-04 2015-07-31 Procédé de fabrication d'un ressort à ruban et dispositif de pliage pour sa fabrication

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EP3194091A1 EP3194091A1 (fr) 2017-07-26
EP3194091B1 true EP3194091B1 (fr) 2019-05-08

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EP15747446.1A Not-in-force EP3194091B1 (fr) 2014-08-04 2015-07-31 Procédé de fabrication d'un ressort à ruban et dispositif de pliage pour sa fabrication

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Country Link
US (1) US10661330B2 (fr)
EP (1) EP3194091B1 (fr)
CN (1) CN106714995B (fr)
BR (1) BR112017002091A2 (fr)
DE (1) DE102014111015A1 (fr)
MX (1) MX2017001503A (fr)
WO (1) WO2016020294A1 (fr)

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DE102018209883A1 (de) * 2018-06-19 2019-12-19 Wafios Aktiengesellschaft Biegemaschine zur Herstellung von Biegeteilen aus Flachmaterial
CN112893696A (zh) * 2021-01-08 2021-06-04 南京亭上雪科技有限公司 一种钢条螺旋折弯装置

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US3608347A (en) * 1968-09-17 1971-09-28 Werner Kemminer Process and apparatus for manufacturing rings
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Publication number Publication date
US10661330B2 (en) 2020-05-26
WO2016020294A1 (fr) 2016-02-11
US20170216905A1 (en) 2017-08-03
BR112017002091A2 (pt) 2017-11-21
DE102014111015A1 (de) 2016-02-04
CN106714995A (zh) 2017-05-24
CN106714995B (zh) 2020-05-15
EP3194091A1 (fr) 2017-07-26
MX2017001503A (es) 2018-01-12

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