EP0192584B1 - Verfahren und Vorrichtung zum Herstellen von Rillen auf einer Abwicklungswand - Google Patents

Verfahren und Vorrichtung zum Herstellen von Rillen auf einer Abwicklungswand Download PDF

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Publication number
EP0192584B1
EP0192584B1 EP86420020A EP86420020A EP0192584B1 EP 0192584 B1 EP0192584 B1 EP 0192584B1 EP 86420020 A EP86420020 A EP 86420020A EP 86420020 A EP86420020 A EP 86420020A EP 0192584 B1 EP0192584 B1 EP 0192584B1
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EP
European Patent Office
Prior art keywords
axis
wheel
wall
intersection
revolving
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Expired
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EP86420020A
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English (en)
French (fr)
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EP0192584A1 (de
Inventor
Charles Marcon
Jean Poullain
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Escofier Technologie Sa SA
Escofier Technologie SAS
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Escofier Technologie Sa SA
Escofier Technologie SAS
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Priority to AT86420020T priority Critical patent/ATE48771T1/de
Publication of EP0192584A1 publication Critical patent/EP0192584A1/de
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/20—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls
    • B21C37/205—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls with annular guides
    • 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
    • B21D17/00—Forming single grooves in sheet metal or tubular or hollow articles
    • B21D17/04—Forming single grooves in sheet metal or tubular or hollow articles by rolling

Definitions

  • the method and the device which are the subject of the invention relate to the production of grooves on the wall of revolution of a hollow body, without removal of material.
  • Figure 1 is a perspective view of a known device for forming a helical groove by wheel.
  • This figure schematically represents, in perspective, an existing device.
  • This device comprises a wheel (1) mounted free in rotation on an axis (X o ) which rolls continuously on the external wall of a tube (2) which is driven in rotation around its axis (X l ).
  • the axis (X o ) is perpendicular to the radius (3) of the tube (2) passing through the intersection zone (4) between the edge (5) of the wheel (1) and the wall of the tube (2).
  • This axis (X o ) is inclined at an angle (a1) relative to a secant line parallel to the axis (X i ).
  • the desired depth of the thread (6) is obtained by exerting sufficient pressure on the knurl (1) so that its edge (5) penetrates the wall of the tube (2) to the desired depth. This pressure depends on the dimensions of the tube (2) and the knob (1), as well as on the depth of the thread (6) to be produced.
  • This pressure depends on the dimensions of the tube (2) and the knob (1), as well as on the depth of the thread (6) to be produced.
  • tubes whose wall thickness is relatively small it can be seen that, at instead of obtaining a displacement of material limited to the intersection zone (4) and its immediate vicinity, there is an overall deformation of the tube, elastic, or even permanent, which renders the method inapplicable.
  • Patent FR-A 1 551 913 describes a process for forming metallic objects from billets or blanks (page 1, right column, lines 1 to 10) which consists in rotating a series of small working rollers continuously, one after the other in an orbit, mounting a blank so that its superficial zone intersects the orbit and is struck in turn by the rollers, in an uninterrupted succession, so that the metal of the surface area undergoes plastic deformation by following the outline of the rollers. It is essential that these rollers are supported by support rollers or fixed members in their area of action.
  • Figures 1 and 4 of this patent show a cylindrical blank around which a helical groove is formed by means of small rollers (12), mounted in rotation on axes, axes which are distributed around the periphery of a circular cage (10 ) rotary. These rollers are supported by a central roller (16) against which they are supported. It is also possible, as shown in FIG. 2, to use a hinged cage in the form of a chain (10), provided with rollers (22), which performs a closed circuit course in an elliptical orbit by bearing on a support. central (20) against which the rollers (22) bear. The working rollers (12) are also connected to the chain and resting on the rollers (22). The chain is driven by an appropriate mechanism.
  • the method and the device according to the invention make it possible to solve these problems in a particularly effective manner.
  • the method according to the invention makes it possible to form, without removing material, at least one groove, on the wall of revolution of a hollow body made of a ductile or plastic material.
  • at least one revolution wheel is used, comprising at least one forming edge, mounted to rotate freely on an axis. This axis moves parallel to itself so that its point of intersection with a perpendicular plane cyclically performs a course reserved for it along a determined closed curve, of circular or elongated shape, said course not being followed by no other wheel.
  • the envelope curve of the path of at least one forming edge of the thumbwheel comprises an area of intersection with the wall of revolution, an area which moves relatively around this wall.
  • the wheel has at least one forming edge, the largest diameter of which is greater than the length of the diagonal of the determined closed curve, the extension of which intersects the intersection zone in the middle as well as the axis of the hollow body. If the determined closed curve is a circumference, the diameter of the latter is therefore less than that of the wheel.
  • the determined closed curve has an elongated shape. It is preferably oriented so that the diagonal of this curve, the extension of which intersects the intersection zone in its middle as well as the axis of the wall of revolution of the hollow body, is substantially perpendicular to the longest diagonal of this curve. closed determined.
  • a helical groove is produced on the wall of revolution of the hollow body by a relative translational movement of this wall of revolution along its axis with respect to the intersection zone associated with a rotational movement of said wall.
  • the plane of the envelope curve of the path of the forming edge of the wheel can be oriented around an axis contained in this plane and intersecting both the axis of the wall of revolution and the intersection zone.
  • the plane of the envelope curve is oriented so that, in the intersection zone, it is parallel to a tangent to the helical groove in progress.
  • knurls are used distributed around the axis of the wall of revolution of the hollow body so that the envelope curves of their forming edges have with the wall of revolution different areas of intersection distributed around this wall. of revolution.
  • the envelope curves of their forming edges have, in their areas of intersection with this wall, different penetration depths.
  • the direction of rotation of this wall of revolution and the direction of travel of a closed curve determined by the axis of the corresponding wheel are the same.
  • a smoothing wheel whose axis is hand is used in combination with at least one forming wheel. kept at a substantially constant distance from the wall of revolution and the edge of which rolls in a groove already formed by the forming wheel, by continuously exerting pressure on the bottom and the side walls of this groove.
  • the method according to the invention applies in particular to the production of grooves, in the form of helical threads, on the end wall of metallic, cylindrical or conical tubes, in order to produce good quality screwed assemblies for example by means of of female threaded fittings.
  • the invention also relates to a device for forming grooves without removing material, on the wall of revolution of a hollow body made of a ductile or plastic material by means of at least one revolution wheel, mounted freely in rotation on an axis and provided with at least one forming edge.
  • This device comprises a support rotatable around an axis, connected to a first means for driving in rotation, and provided with gripping means making it possible to grasp a hollow body, comprising a wall of revolution, so that the axis of this wall coincides with the axis of rotation of the support.
  • This device also comprises at least one rigid wheel holder on which is mounted a single free wheel in rotation on an axis integral with this wheel holder.
  • a second drive means cyclically moves this wheel holder so that the wheel axis moves parallel to itself and its point of intersection with a perpendicular plane cyclically traverses a determined closed curve, circular or elongated shape, an adjustment means making it possible to vary the distance between the wheel holder and the wall of revolution, so that the envelope-curve of the cyclic movement of at least one forming edge of the wheel has a zone of intersection with this wall of revolution.
  • the thumbwheel has at least the forming edge, the largest diameter of which is greater than the length of a diagonal of the determined closed curve, the extension of which intersects the intersection zone in the middle as well as the axis of the wall of revolution. of the hollow body.
  • the device advantageously comprises a third drive means which allows a relative translation of the wall of revolution of the hollow body along its axis relative to at least one forming wheel mounted on the wheel holder which corresponds to it.
  • At least one wheel holder is orientable about an axis which is in the plane of the envelope curve of the path of at least one forming edge of the single wheel which corresponds to this wheel holder.
  • This axis intersects both the axis of the wall of revolution and the area of intersection between this wall of revolution and this curve-envelope.
  • the movement of the wheel holder is carried out so that the determined closed curve has an elongated shape. It is then preferably oriented in such a way that a diagonal located in its plane, the extension of which cuts the intersection zone in its middle as well as the axis of the wall of revolution of the hollow body, is substantially perpendicular to the most long diagonal of this determined closed curve.
  • the device advantageously comprises a fourth drive means which makes it possible to move at least one wheel-holder in the direction of the axis of the wall of revolution as a function of the relative translation of the wall of revolution along its axis relative to this wheel holder.
  • the device comprises several wheel holders each equipped with a single forming wheel distributed around the axis of the wall of revolution.
  • the device comprises at least one wheel which has several forming edges.
  • the device comprises at least one wheel holder equipped with a smoothing wheel whose axis does not effect cyclic movement.
  • This wheel holder comprises an adjustment means which makes it possible to press the edge of the smoothing wheel against the walls of a groove already formed on the wall of revolution of the hollow body.
  • the wall of revolution (10) of a hollow body is seen in section along a plane perpendicular to its axis (X 2 ).
  • the revolution wheel (11) is mounted to rotate freely on an axis (X 3 ) which is driven in gyration parallel to itself around the axis (X 4 ) by a drive means not shown.
  • the radius (R 1 of the forming edge of the wheel (11) is larger than the radius of gyration (R 2 ) of the axis (X 3 ) around the axis (X 4 ).
  • the radius (R 3 ) of the envelope curve (14) is greater than (R 1 ) and tends to approach it when the value of (R 2 )
  • Such an arrangement reduces the angle of incidence of the forming edge (15) of the thumbwheel when it comes into contact with the bottom of the groove (16) during formation. This results in a better state of surface of the groove walls and therefore greater precision.
  • FIG 3 shows, schematically, another embodiment of the method according to the invention.
  • the wall of revolution (20) of a hollow body with an axis (X 5 ) is shown in section, perpendicular to this axis.
  • a thumbwheel (21) is mounted, free to rotate, on an axis (X s ) perpendicular to the plane of the figure.
  • This axis in accordance with the method according to the invention, moves parallel to itself so that its point of intersection with a perpendicular plane cyclically follows a path reserved for it, according to the closed curve determined not circular (22 ). This course is carried out in the direction of the arrow (F 4 ) thanks to a rigid and mobile wheel-holder, not shown, which drives the axis (Y 6 ).
  • This curve (22) is elongated and similar in shape to an oval or an ellipse.
  • Its largest diagonal (BC) is oriented relative to the hollow body of axis (X 5 ) in such a way that it intersects at point (M), substantially at right angles, the diagonal (ED) whose extension cuts in its middle the intersection zone (25) between the curve-envelope (23) of the course of the forming edge of the wheel (21) and the wall (20) of the hollow body and also intersects the axis (X 5 ).
  • the diagonal (BC) is substantially parallel to the tangent (T) to the curve (23) in the intersection zone (25).
  • the length of the short diagonal (ED) is at least equal to the depth of penetration (el) of the edge of the wheel in the wall (20) so that there is no possible interaction between this edge and this wall during the return path of the axis (X s ) along the branch (B, E, C) of the curve (22).
  • the arrow (F 5 ) indicates the direction of rotation of the wheel in contact with the wall (20).
  • the arrow (F 6 ) indicates the direction of rotation of the wall (20) around the axis (X 5 ).
  • the direction of rotation of this wall is preferably the same as the direction of travel of the closed curve determined by the point of intersection of the axis (X s ) with this curve.
  • the oval shape of the determined closed curve (22) has the very great advantage of reducing the angle of attack of the forming edge of the wheel (21), when it comes into contact with the wall (20), this which greatly reduces the shock caused at this time.
  • the quality of the groove is also a function of the forming work carried out at each passage of the forming edge of the wheel (21) in the intersection zone (25).
  • This unit forming work is adjusted by acting on the one hand on the frequency of the travel of the envelope curve (23) by the forming edge (24) and on the other hand on the speed of rotation of the wall (20) around of its axis (X 5 ).
  • This forming work must, in any case, remain below the limit which would cause unacceptable permanent deformation of the wall of the tube (20) over its entire thickness.
  • each of the wheels moves so that its point of intersection with a perpendicular plane traverses the determined closed curve which corresponds to it.
  • the curve of the course of the forming edge of each wheel has its own distinct area of intersection with the wall. It is advantageous that the determined closed curves traversed by the axes of the rollers are similar in order to balance the forces exerted on the wall, but this is not a necessity.
  • the drive of each of the wheels, so that its axis traverses the determined closed curve which corresponds to it is carried out, as has been said in the case of FIG. 3, by means of a corresponding rigid and mobile wheel-holder.
  • the rollers can be arranged so that the envelope curves of the paths of their forming edges lie in the same plane perpendicular to the axis of the wall of revolution of the hollow body. This forms an annular groove successively traversed by the knobs used.
  • This carriage can then move, in synchronism with the speed of rotation of the wall of revolution, thanks to the mother screw of the lathe.
  • the forming edges of the rollers must be offset from each other, parallel to the axis of the hollow body, so as to contribute to the formation of the same helical groove. If for example 4 knurls are distributed at 90 ° from each other around the same wall of revolution, in order to achieve a helical groove of pitch (P), the most forward knurl attacks the formation of the groove, while that the three others who continue to form this same groove must be offset by
  • FIG. 4 schematically represents half-sections of four knurls (26, 27, 28, 29) mounted free in rotation around four axes (X 7 , X 8 , Xg, X 10 ). These knobs are distributed around the wall of revolution of a hollow body and the axis of each of them traverses a determined closed curve, circular in the manner which is represented in FIG. 2. The areas of intersection of the curves- envelopes of the paths of the forming edges of each of these knurls are distributed substantially at 90 ° from one another around the wall of revolution.
  • Each of these wheels has two forming edges: (A ,, and B 1 , A 2 and B 2 , A 3 and B 3 , A 4 and B 4 ).
  • the forming edges (A ,, A 2 , A 3 , A 4 ) have respective radii (R I , R 2 , R 3 , R 4 ) increasing, which makes it possible to form in a single revolution of the wall around its axis a helical thread having the desired depth.
  • the second forming edges (B 1 , B 2 , B 3 , B 4 ) have substantially the same radius equal to (R 4 ).
  • the second forming edge (B i , B 2 , B 3 , B 4 ) is offset on each wheel (26, 27, 28, 29) relative to the first forming edge (A 1 , A 2 , A 3 , A 4 ) the desired distance for the metal to be worked at the desired location.
  • the accuracy is improved by orienting the axes of the knurls so that the lateral flanks of their forming edges are substantially parallel to a tangent to the helical thread in the intersection zone.
  • FIG. 5 shown in plan, the cylindrical wall of revolution of a hollow body (30) of axis (X 11 ) on which a groove in the form of a helical thread (31) is being formed.
  • a thumbwheel (32) is shown in the area of intersection of the envelope curve of its forming edge with the wall of the hollow body (30).
  • This wheel is rotatably mounted on an axis (X 12 ) which, itself mounted on a mobile wheel holder, cyclically travels along a determined closed curve while maintaining its orientation.
  • This axis (X 12 ) is in a plane substantially parallel to the plane tangent to the generatrix of the wall of the hollow body (30) passing through the intersection area specified above. In the case of Figure 5 this tangent plane is substantially parallel to the plane of the figure.
  • the axis (X 12 ) is inclined at an angle " ⁇ 2" relative to a parallel to the axis of revolution (X I1 ) which intersects it.
  • This angle "a2” is preferably substantially equal to the angle " ⁇ 3" of inclination of a tangent to the helical thread (31) relative to the plane perpendicular to the axis (X 11 ), the plane of which we see the trace in (33).
  • the inclination of an axis such as (X 12 ) of a wheel such as (32) is obtained by rotating the wheel holder (not shown) around an axis perpendicular to the axis (X 11 ) of the wall of revolution and passing through the intersection zone between the envelope curve of the forming edge of the thumbwheel (32) and the wall of revolution (30) of the hollow body.
  • Such a means of tilting the wheel axes can, for example, be implemented each time it is proposed to make a groove or a helical thread.
  • Figure 6 shows the wall of revolution (34) of a hollow body of axis (X l3 ) whose outer surface is conical.
  • a helical thread (35) is formed on this surface, by means of knobs such as (36), which rotate around axes such as (X 14 ).
  • knobs such as (36)
  • Each of these wheels is mounted on a corresponding wheel holder not shown.
  • the wheel axis (X, 4 ) is in a plane parallel to the axis of revolution (X 13 ), and perpendicular to a line, itself perpendicular to this axis, line which passes through the intersection zone between the envelope curve of the cyclic path of the forming edge of the thumb wheel and the wall.
  • This plane therefore makes, with a parallel (37) to the generator (38) of the conical wall, an age "a4" equal to the half-angle at the top of the cone. Under these conditions, the forming edge of each wheel does not act symmetrically on the wall. This has few drawbacks if the angle " ⁇ 4" is small. It is also possible, as has been explained in the case of FIG. 5, to orient the axes of knurls such as (X 14 ) so that the lateral flanks of the forming edges are made parallel to the helical thread (35). This orientation is achieved by rotation of the wheel holder around an axis perpendicular to the axis (X 13 ) passing through the intersection zone between curve-envelope and wall.
  • FIG. 7 describes a particular embodiment of the device according to the invention.
  • a wheel (41) is mounted for free rotation on an axis (X 16 ) secured to a movable rigid wheel holder (42).
  • This wheel-holder is mounted free in rotation on a crank pin (43) whose axis (X 17 ) rotates around the axis (X, 8 ) which drives it in rotation clockwise by a motor means not shown.
  • a link (44) articulated at (X 19 ) on the wheel holder and at (X 20 ) on a retaining ring (45) contributes to guiding the wheel holder (42).
  • the axes (X, 6 , X 17 , X 18 , X 19 and X 2o ) are parallel. It follows that when the axis (X 17 ) of the crankpin is driven around the axis (X 18 ) in a clockwise direction by the drive means, the wheel axis (X 16 ) follows cyclically the determined closed curve (46) in the direction of the arrow (F 7 ).
  • the envelope curve (47) of the course of the forming edge of the thumbwheel has an intersection zone (48) with the wall (40).
  • the determined closed curve (46) has a larger diagonal (X 21 ), which is also the large diagonal of the envelope curve (47).
  • Such an arrangement makes it possible to obtain a small angle of incidence of the forming edge of the wheel when, at each cycle, it engages in the intersection zone. It is also possible, by rotating the ring (45) around its axis in a suitable direction, to move the envelope-curve (47) closer or further away from the wall of revolution (40) and therefore to adjust the penetration depth of the wheel edge, or even to follow a cone. It is therefore possible thus, to produce on a conical wall a helical thread (50) of constant depth.
  • the wheel axis (X 16 ) runs along the determined closed curve (46) clockwise (arrow direction (F l ). This direction is the same as the direction of rotation of the wall (40) indicated by the arrow (F a ).
  • the wheel rolls in the direction of the arrow (Fg). It is possible, by means not shown, to rotate the plane of the envelope curve (47) around 'an axis such as the straight line (49) so as to orient it parallel to a tangent to a helical thread passing through the intersection zone (48).
  • Figure 8 and the detail figure 9 show in perspective, partially, another embodiment of the device according to the invention.
  • 4 knurls each mounted on a knurl holder are used, distributed at 90 ° from one another around the axis (X 22 ) of a hollow body (59) on the wall of revolution (60) from which it is proposed to produce a helical thread.
  • a drive means rotates this wall (60) about its axis (X 22 ) in the direction of the flece (F lo ).
  • only two rollers (61 and 62), each mounted on a roll holder support (63, 64) and distributed at 180 ° around the axis (X 22 ) have been shown.
  • Figure 9 shows clearly that the wheel (65) is an annular part mounted free in rotation by means of a rolling ring (66) on a part (67) having a cylindrical bearing axis (X 33 ) which constitutes the axis of the wheel.
  • a drive means in rotation not shown rotates a shaft (68) of axis (X 24 ) which drives around it the axis (X 23 ) which is parallel to it, so that the point of intersection of this axis (X 23 ) with a perpendicular plane describes in a cyclic way a path following a determined closed curve.
  • the part (67) is therefore the rigid and mobile wheel holder on which the wheel (65) is mounted.
  • this determined closed curve is a circumference whose radius is equal to the distance between the axes (X 23 ) and X 24 ).
  • the forming edge (69) of the wheel (65) describes an envelope curve (70).
  • each of the wheel holder supports (63, 64) can rotate around an axis (X 25 ) perpendicular to the axis (X 22 ) and which crosses the intersection zones of the envelope curves paths of the forming edges of the rollers (61, 62) with the wall of revolution (60).
  • each wheel holder support is rotatably mounted about this axis (X 25 ) on the carriage (71, 72) which carries it.
  • Verniers (73, 74) make it possible to adjust the inclination of the support (63, 64) and therefore of the corresponding wheel holder so that the envelope curve of the course of the forming edge of the wheel is parallel to the tangent to the thread helical to perform in the intersection area.
  • Each of the carriages (71, 72) can slide radially in one direction or the other according to the arrows (F 11 , F 12 ) relative to the axis (X22) in slides such as (75,76) formed in fixed support parts (77,78).
  • the radial movement of all of the carriages is controlled by means of a crown (79) which can be rotated in one direction or the other, according to the arrow (FI3) around its axis, which is practically coincident with the axis (X22).
  • the crown (79) carries rollers (80, 81) engaged in inclined notches (82, 83) formed at the ends of the carriages (71, 72).
  • rollers (80, 81) engaged in inclined notches (82, 83) formed at the ends of the carriages (71, 72).
  • the fourth wheel holder will be equipped with a smoothing wheel whose axis distance with the wall of revolution will be set to a fixed value so that the wheel rolls continuously in the bottom of the already formed net, equalizing its walls.
  • the profile of this smoothing wheel will correspond to the final profile that we propose to give to the helical thread.
  • one can distribute around the axis of the wall of revolution for example, 6 wheel holder supports instead of 4, and equip 2 of these supports with smoothing wheels to fixed axis which roll continuously at the bottom of the net, equalizing the profile.
  • the wheel holder supports are inclined, as just described, so that the envelope curve of the path of the forming edge of each of the first three knobs is parallel to the tangent to the helical thread to be produced.
  • the same inclination is given to the wheel holder support on which the fourth wheel with fixed axis is mounted. It can be seen that the helical thread thus produced has excellent precision and an excellent surface condition and that the internal dimensions of the tube have not been substantially modified in the area in which the external thread is produced.
  • knobs can be made, for their implementation, to the method and to the device, for their implementation, which have just been described without departing from the scope of the invention. It is in particular possible to adapt the knobs to the production of any groove profile that it is proposed to produce. In the case where the groove which it is proposed to produce is a helical thread, the profile of the latter can be given the optimal shape in order to obtain, for example, the qualities of tightness and tightness expected from 'a screwed junction.

Claims (20)

1. Umformungsverfahren, ohne Wegnahme von Material, von Rillen in Dreh- oder Abwicklungswänden von Hohlkörpern aus duktilem oder plastischem Material, bei dem wenigstens ein Drehrädchen (11, 21) verwendet wird, das drehend auf einer Achse angeordnet ist, die sich parallel zur Achse bewegt, derart, dass sein Schnittpunkt mit einer senkrechten Ebene auf zyklische Weise einen Weg entlang einer geschlossenen vorbestimmten Kurve (12, 22) durchläuft, welche eine kreisförmige oder langgezogene Form aufweist, wobei das Rädchen wenigstens einen Formungsrand (15, 24) aufweist, von dem die Hüllkurve des zyklischen Weges eine Schnittzone (13, 25) mit der Abwicklungswand aufweist, wobei die Zone in relativer Weise um diese Abwicklungswand sich bewegt, dadurch gekennzeichnet, dass die geschlossene, vorbestimmte Kurve (12, 22) nicht von dem Schnittpunkt der Achse eines weiteren Rädchens durchlaufen wird, und dass der grösste Durchmesser des Formungsrandes (15, 24) dieses Rädchens grösser als die Länge einer Diagonale (E-D) der geschlossenen, vorbestimmten Kurve, deren Verlängerung die Schnittzone (13, 25) sowie die Achse (X2, X5) des Hohlkörpers schneidet.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass wenn die geschlossene, vorbestimmte Kurve (22) eine längliche Form aufweist, sie derart ausgerichtet ist, dass eine ihrer Diagonalen (E-D), von der die Verlängerung die Schnittzone (25) schneidet und auch die Achse (X5) der Abwicklungswand des Hohlkörpers schneidet, im wesentlichen senkrecht zur längsten Diagonale (B-C) dieser geschlossenen, vorbestimmten Kurve verläuft.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass eine schraubenförmige Rille (31, 35) auf der Abwicklungswand des Hohlkörpers (30, 34) durch relative Translation dieser Wand entlang ihre Achse bezüglich der Schnittzone verwirklicht wird, die einer Drehbewegung der Wand zugeordnet ist.
4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Ebene der Hüllkurve des Weges des Formungsrandes des Rädchens (61, 62) um eine Achse (X25) ausrichtbar ist, die in dieser Ebene enthalten ist, die gleichzeitig die Schnittzone und die Achse (X22) der Abwicklungswand des Hohlkörpers schneidet.
5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass die Ebene der Hüllkurve derart ausgerichtet wird, dass sie parallel zu einer Tangente an die schraubenförmige Rille (31) bei der Erzeugung in der Schnittzone verläuft.
6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass mehrere Rädchen (61, 62) verwendet werden, die derart verteilt sind, dass die Hüllkurven, die den Wegen der Formungsränder einer jeden von ihnen entsprechen, mit der Abwicklungswand (60) unterschiedliche Schnittzonen aufweisen, die um diese Abwicklungswand herum verteilt sind.
7. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass um eine schraubenförmige Rille auf einer nichtzylindrischen Abwicklungswand (34) eines Hohlkörpers zu erzeugen, der Abstand zwischen der Achse dieser Abwicklungswand und wenigstens einer Hüllkurve, die dem Weg des Formungsrandes eines Rädchens (36) entspricht, variiert wird, derart, um die Tiefe der Schnittzone zu steuern.
8. Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass für einen Beobachter, der in der Verlängerung der Achse der Abwicklungswand plaziert ist, die Drehrichtung (F1, F6) dieser Wand (10,20) und die Richtung des Weges (F2, F4) einer geschlossenen, vorbestimmten Kurve (12, 22) durch den Schnittpunkt der Achse des entsprechenden Rädchens, gleich sind.
9. Verfahren nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass in Kombination mit wenigstens einem Formungsrädchen, ein Glättungsrädchen verwendet wird, dessen Achse in im wesentlichen konstantem Abstand von der Abwicklungswand gehalten wird und dessen Rand in einer bereits geformten Rille oberhalb dieses Formungsrädchens rollt.
10. Verwendung des Verfahrens nach einem der Ansprüche 1 bis 9 bei der Herstellung von Rillen in Form von spiralförmigem Gewinde auf der Wand eines zylindrischen oder konischen Endes von Metallrohren, um geschraubte Zusammenstellung bzw. Gebilde herzustellen.
11. Vorrichtung, welche die Bildung bzw. Formung von Rillen ohne Entfernung von Material auf Abwicklungswänden von Hohlkörpern aus duktilem oder plastischem Material ermöglicht, die einen um eine Achse drehbaren Träger aufweist, der mit einer ersten Drehantriebseinrichtung verbunden ist, und mit Aufnahmeeinrichtungen versehen ist, die einen hohlen Körper ergreifen, der eine Abwicklungswand aufweist, derart dass die Achse dieser Wand mit der Drehachse des Trägers zusammenfällt und wenigstens ein Drehrädchen aufweist, das drehbar auf einer Achse angeordnet ist, die sich parallel zur Achse derart bewegt, dass sein Schnittpunkt mit einer senkrechten Ebene auf zyklische Weise einen Weg entlang einer geschlossenen, vorbestimmten Kurve erzeugt, die eine kreisförmige oder längliche Form aufweist, wobei das Rädchen wenigstens einen Formungsrand aufweist, von dem die Hüllkurve des zyklischen Weges eine Schnittzone mit der Abwicklungswand aufweist, eine Zone, die sich auf relative Weise um diese Wand bewegt, dadurch gekennzeichnet, dass sie wenigstens einen starren Rädchenträger (42, 67) aufweist, auf dem ein einziges Rädchen (41, 65) frei drehbar auf einer Achse (X16, X23) angeordnet ist, die mit diesem Rädchenträger verbunden ist, wobei eine zweite Antriebseinrichtung (43, X24), die auf zyklische Weise den Rädchenträger derart bewegt, dass der Schnittpunkt der Rädchenachse mit der senkrechten Ebene auf zyklische Weise einen Weg entlang einer geschlossenen, vorbestimmten kreisförmigen oder länglichen Kurve erzeugt, wobei das auf dieser Achse angeordnete Rädchen wenigstens einen Formungsrand aufweist, dessen grösster Durchmesser grösser ist als die Länge einer Diagonale (E-D) der geschlossenen, vorbestimmten Kurve (46) und deren Verlängerung die Schnittzone (48) sowie die Achse (XIs) der Abwicklungswand (40) des Hohlkörpers schneidet, und dass sie eine Regelungseinrichtung (44, 71) aufweist, die erlaubt, den Abstand zwischen dem Rädchenträger und der Abwicklungswand zu verändern, um die Tiefe des Eindringens des Randes des Rädchens in die Abwicklungswand einzustellen.
12. Vorrichtung nach Anspruch 11, dadurch gekennzeichnet, dass eine Verschiebeeinrichtung erlaubt, den Hohlkörper (59) entlang seiner Achse (X22) auf relative Weise bezüglich der Rädchen und synchron mit seiner Drehbewegung um dieselbe Achse (X22) zu bewegen, derart, um eine schraubenförmige Rille zu bilden.
13. Vorrichtung nach Anspruch 11 oder 12, dadurch gekennzeichnet, dass die geschlossene, vorbestimmte Kurve (46) langgezogen ist, wobei ihre grösste Diagonale (X21) im wesentlichen senkrecht zu einer Diagonale ist, deren Verlängerung (49) die Schnittzone (48) sowie die Achse (XIs) der Abwicklungswand schneidet.
14. Vorrichtung nach einem der Ansprüche 11 bis 13, dadurch gekennzeichnet, dass wenigstens ein Rädchenträger (67) um eine Achse (X25) ausrichtbar ist, die sich in der Ebene der Hüllkurve des Weges wenigstens eines Formungsrandes des Rädchens befindet, der diesem Rädchenträger entspricht, wobei die Achse gleichzeitig die Schnittzone und die Achse (X22) der Abwicklungswand schneidet.
15. Vorrichtung nach einem der Ansprüche 11 bis 14, dadurch gekennzeichnet, dass eine Antriebseinrichtung (79) erlaubt, wenigstens einen Rädchenträger in Richtung der Achse (X22) der Abwicklungswand (60) in Abhängigkeit der relativen Translation dieser Wand entlang dieser Achse bezüglich dieses Rädchenträgers zu bewegen.
16. Vorrichtung nach einem der Ansprüche 11 bis 15, dadurch gekennzeichnet, dass sie mehrere Rädchenträger aufweist, die jeweils mit einem einzigen Formungsrädchen (61, 62) versehen sind, die um die Achse der Abwicklungswand verteilt sind.
17. Vorrichtung nach einem der Ansprüche 11 bis 16, dadurch gekennzeichnet, dass wenigstens ein Rädchen (26, 27, 28, 29) mehrere Formungsränder (A1-B1, A2-B2, A3-B3, A4-B4) aufweist.
18. Vorrichtung nach einem der Ansprüche 11 bis 17, dadurch gekennzeichnet, dass wenigstens ein Rädchenträger mit einem Glättungsrädchen versehen ist, dessen Achse keine zyklische Bewegung ausführt, wobei die Vorrichtung ebenfalls wenigstens einen Rädchenträger aufweist, der mit einem Formungsrädchen versehen ist, das derart angeordnet ist, dass es eine Rille bildet, im Innern derer das Glättungsrädchen, das oberhalb angeordnet ist, auf kontinuierliche Weise rollt.
19. Vorrichtung nach Anspruch 16, dadurch gekennzeichnet, dass wenn mehrere Formungsrädchen (26, 27, 28, 29) dieselbe Rille oder dasselbe Gewinde durchqueren, sie derart angeordnet sind, dass die Tiefe der Schnittzone der Hüllkurve des Weges eines Formungsrandes wenigstens einer unter ihnen unterschiedlich ist von der Tiefe des Schnitts der Hüllkurve, die einem Rand wenigstens eines weiteren Rädchens entspricht.
20. Vorrichtung nach einem der Ansprüche 11 bis 19, dadruch gekennzeichnet, dass wenn die geschlossene, vorbestimmte Kurve (22) länglich ist, die Länge der kurzen Diagonale (E-D) wenigstens gleich der Eindringtiefe (ei) des Rädchenrandes in der Abwicklungswand (20) ist.
EP86420020A 1985-01-23 1986-01-22 Verfahren und Vorrichtung zum Herstellen von Rillen auf einer Abwicklungswand Expired EP0192584B1 (de)

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FR8501330 1985-01-23

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DE102008001046B3 (de) 2008-04-08 2009-06-18 Zf Friedrichshafen Ag Rohreinheit, ein Verfahren zur Herstellung einer derartigen Rohreinheit und Schwingungsdämpfer
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EP0192584A1 (de) 1986-08-27
CA1293845C (fr) 1992-01-07
WO1986004274A1 (fr) 1986-07-31
FR2576228B1 (fr) 1989-12-01
ATE48771T1 (de) 1990-01-15
DE3667618D1 (de) 1990-01-25
SU1729282A3 (ru) 1992-04-23
JPS62501488A (ja) 1987-06-18
US4838066A (en) 1989-06-13
FR2576228A1 (fr) 1986-07-25
JPH0236329B2 (de) 1990-08-16

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