EP3345694A1 - Procédé et dispositif pour épaissir localement et ainsi fabriquer un corps creux - Google Patents

Procédé et dispositif pour épaissir localement et ainsi fabriquer un corps creux Download PDF

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Publication number
EP3345694A1
EP3345694A1 EP17150435.0A EP17150435A EP3345694A1 EP 3345694 A1 EP3345694 A1 EP 3345694A1 EP 17150435 A EP17150435 A EP 17150435A EP 3345694 A1 EP3345694 A1 EP 3345694A1
Authority
EP
European Patent Office
Prior art keywords
hollow body
axial direction
outer mold
body wall
wall
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
EP17150435.0A
Other languages
German (de)
English (en)
Other versions
EP3345694B1 (fr
Inventor
Werner Michi
Jörg Wachter
Dennis Beihofer
Phillip Grupp
Michael Marré
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.)
Felss Systems GmbH
Original Assignee
Felss Systems GmbH
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 Felss Systems GmbH filed Critical Felss Systems GmbH
Priority to EP17150435.0A priority Critical patent/EP3345694B1/fr
Priority to CA2990655A priority patent/CA2990655C/fr
Priority to KR1020180000318A priority patent/KR102190176B1/ko
Priority to US15/860,878 priority patent/US11007564B2/en
Priority to JP2018000196A priority patent/JP6698713B2/ja
Priority to CN201810010668.2A priority patent/CN108356207B/zh
Publication of EP3345694A1 publication Critical patent/EP3345694A1/fr
Priority to US17/232,276 priority patent/US11890667B2/en
Application granted granted Critical
Publication of EP3345694B1 publication Critical patent/EP3345694B1/fr
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
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J9/00—Forging presses
    • B21J9/02—Special design or construction
    • B21J9/06—Swaging presses; Upsetting presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/06—Making machine elements axles or shafts
    • B21K1/063—Making machine elements axles or shafts hollow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00—Details of machines for forging, pressing, or hammering
    • B21J13/02—Dies or mountings therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00—Details of machines for forging, pressing, or hammering
    • B21J13/06—Hammers tups; Anvils; Anvil blocks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
    • B21J5/025—Closed die forging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/08—Upsetting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/12—Forming profiles on internal or external surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J9/00—Forging presses
    • B21J9/10—Drives for forging presses
    • B21J9/20—Control devices specially adapted to forging presses not restricted to one of the preceding subgroups
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K21/00—Making hollow articles not covered by a single preceding sub-group
    • B21K21/12—Shaping end portions of hollow articles

Definitions

  • the invention relates to a method and a device for the particular sectional thickening of a plastically deformable hollow body wall of a hollow body, wherein the hollow body wall along an axis of a cavity bounded by the hollow body wall cavity of the hollow body extends in an axial direction.
  • the invention further relates to a manufacturing method for manufacturing a hollow body, in which use is made of the above method and a machine for manufacturing a hollow body having a device of the above type.
  • Hollow body of this type for example, hollow shafts, as used in automotive engineering as drive shafts and thereby among other things as side shafts.
  • methods and devices are used by means of which hollow sections of different wall thickness are produced on hollow shafts by reducing the wall of a shaft blank in one axial section while retaining the original wall thickness in another axial section of the shaft blank.
  • methods of cold working such as rotary swaging, may be used.
  • the object of the present invention is to provide alternative methods and apparatus for the particular sectional thickening of a plastically deformable hollow body wall of a hollow body and for the production of a hollow body with a particular partially thickened hollow body wall.
  • the hollow body in question is arranged with the still-thickened hollow body wall in a receptacle of an outer mold.
  • the recording of the outer shape has a receiving wall which extends on the outside of the receiving body arranged in the hollow body wall in the axial direction.
  • a first part length of the receiving wall extends near the hollow body wall parallel to this and forms an outer support surface for the non-thickened hollow body wall.
  • a second part length of the receiving wall is offset from the first part length of the receiving wall with extension of the receptacle radially outward and limits a formed due to the offset escape space of the outer mold.
  • an inner support body On the inside of the unthickened hollow body wall, an inner support body is arranged such that it has one on the inside the hollow body wall in the axial direction and thereby in particular parallel to the hollow body wall extending support body surface forms an inner support surface for the hollow body wall.
  • the inner support body and provided on this inner support surface lie in the axial direction both at the level of the outer support surface and at the level of the escape space of the outer mold.
  • the hollow body is acted upon by two Beauftschungsorgane Beauftschungsstellen each in the axial direction with a compressive force by the Beauftschungsorgane with a compression movement in the axial direction to each other be moved.
  • the loading points on the hollow body are spaced apart in the axial direction and the escape space of the outer shape is arranged between the loading points.
  • the inner support body preferably ensures that the cross section of the hollow space delimited by the hollow body wall remains essentially unchanged, in particular at the level of the escape space of the outer shape.
  • the inventive method can be configured in particular as a method of cold forming.
  • Be formed hollow body made of any plastically deformable materials, in particular hollow body having at least walls of plastically deformable metal.
  • an inner support body for example, a thorn
  • admission organs come stamp in question.
  • a motor drive for generating the compression movement of the Beauftschungsorgane can be provided in particular a controllable hydraulic drive. But also other controllable drive types are conceivable.
  • the motor drive of the Beauftschungsorgane two drive units, each of which is associated with one of the Beauftschungsorgane and controlled, for example, by means of a numerical control of each other coordinated.
  • the numerical control for the Beauftschungsorgane may be integrated into a higher-level device or tool control or in a higher-level machine control.
  • the reshaped hollow body is preferably open in the axial direction at least one end.
  • different axial sections of the hollow body wall can be thickened in the manner described. Thickening of the hollow body wall at one or both ends located in the axial direction is just as possible as a thickening of an axial portion of the hollow body wall spaced from the axial ends.
  • the compression movement or the motor drive of the Beauftschungsorgane can be controlled according to the invention and / or force controlled (claim 4).
  • a combination of path control and force control is possible.
  • the path length can be specified, via which the Beauftschungsorgane be moved towards each other for the plasticization of material of the reshaped hollow body wall in the axial direction.
  • the basis for the force control of the compression movement may be the amount of the forming force, which is introduced by means of the Beauftschungsorgane in the reshaped hollow body wall. Exceeds the amount of forming force a predetermined limit, the compression movement of the Beaufschlagungsorgane can be terminated by appropriate control of the motor drive the Beauftschungsorgane.
  • Exceeding the predetermined limit of the forming force for example, as soon as the escape space of the outer mold is completely filled with plasticized material of the hollow body wall and consequently under the effect of the force exerted by the Beauftschungsorganen on the hollow body wall pressure no further plasticized wall material can flow into the escape space. If there is the possibility of increasing the escape space, an increase in the escape space may be initiated upon reaching or shortly before reaching the limit value of the forming force and thereby the condition is created that further plasticized wall material can flow into the escape space.
  • Both the path length to be defined in the path control of the compression movement and the limit value of the deformation force in the force control of the deformation processes can be determined empirically in particular.
  • the hollow body In principle, it is possible to act on the hollow body at arbitrary points along the cavity area of the cavity bounded by the hollow body wall with opposing pressure forces.
  • according to claim 5 is preferably a pressurization of the hollow body at least one of the well-accessible for the forming end end radial end faces of the hollow body, in particular the hollow body wall.
  • one of the Beauftschungsorgane formed as a hollow organ and provided with a running in the axial direction of the organ cavity, so can enter the organ cavity of the respective Beauftschungsorgans in the compression movement of the Beauftschungsorgane the inner support body. If the cross-section of the organ cavity and the cross-section of the inner support body are matched and the cooperating with the hollow member is integrally formed with the inner support body, the two Beaufschlagungsorgane are in the compression movement through the received in the organ cavity inner support body in the axial direction relative to each other guided (claim 7).
  • the hollow body is acted upon in the axial direction by a Beauftschungsorgan, which projects radially outwardly from the outside of the hollow body wall and limits the escape space of the outer mold in the axial direction (claim 8).
  • a force control of the compression movement of the loading members can be realized.
  • an axial relative movement of the Beauftschungsorgane on the one hand and the outer mold on the other hand in the axial direction is executed (claim 9).
  • the axial extent of the thickening produced on the hollow body wall can be defined.
  • the axial relative movement of the Beauftschungsorgane and the outer shape is carried out by means of a controlled motor drive.
  • the thickened hollow body wall or the hollow body and the outer mold separated by a one of the thickened hollow body wall or the hollow body and the outer shape executed in the axial direction relative movement (claim 11).
  • the invention provides that the thickened hollow body wall or the hollow body is removed from the outer mold, by formed by dividing the outer shape in the axial direction formed outer mold parts in the radial direction by opening the outer mold relative to each other (claim 13).
  • the last-mentioned approach is chosen in particular when the geometry of the deformed hollow body does not permit a removal of the hollow body from the outer shape solely by a movement in the axial direction.
  • the thickenings of the hollow body wall can pass the first part length of the receptacle for the hollow body wall in any of the two axial directions of movement.
  • the device according to the invention has the outer shape divided in the axial direction.
  • the formed by the division of the outer shape outer moldings are, preferably by means of a controllable motor drive, in the radial direction relative to each other movable (claim 17).
  • a controllable motor drive By relative movements of the outer mold parts in the radial direction, the outer mold can be selectively opened or closed.
  • patent claim 18 a formed by division of the outer shape in the radial direction first axial outer mold part in the axial direction in outer moldings, which are movable relative to each other, preferably by means of a controllable motor drive in the radial direction.
  • the first axial outer molded part has the first, reduced cross-sectional partial length of provided on the outer mold receptacle for the hollow body wall.
  • a second axial outer molded part results due to the radial division of the outer shape, a second axial outer molded part.
  • the second axial outer mold part is integrally formed and provided with the escape space of the outer mold, wherein the escape space at the second axial outer mold part opens to the first axial outer mold part and the wall of the escape space in the axial direction extends such that the second axial outer mold part and in the thickening space formed thickening of the hollow body wall under the emergence of the thickening of the hollow body wall from the second axial outer mold part relative to each other in the axial direction are movable.
  • the two axial outer mold parts are adjacent to each other in the axial direction. In the interior of the two axial outer moldings, the first part length of the receiving wall and the escape space complement each other to the entire receptacle provided for the hollow body wall or the hollow body.
  • the second axial outer mold part free of joints. This circumstance is advantageous in that when thickening a hollow body wall due to the lack of joints no joints are undesirably displayed on the thickening of the hollow body wall generated in the escape space of the outer mold. Since only the alternative space is provided by the receiving of the hollow body wall receiving the outer shape of the second axial outer mold part, so that part of the receptacle which is not reduced cross-section compared to a thickening of the hollow body wall generated in the alternative space of the outer mold, the formed hollow body by a Movement in the axial direction can be removed from the second axial outer mold part.
  • Figure 1A has a hinted and designed as a forming machine 1 machine on a first tool holder 2 and a second tool holder 3.
  • a punch 4 is fixed
  • the second tool holder 3 holds a processing unit 5, which in turn consists of a pressure piece 6 and one integral with the pressure piece 6 and with respect to the pressure piece 6 cross-section reduced mandrel 7.
  • the mandrel 7 has as well as the pressure piece 6 has a circular cross-section. Due to the cross-sectional reduction of the mandrel 7 relative to the pressure piece 6, the pressure piece 6 forms a circumferential shoulder 8.
  • the punch 4 and the pressure piece 6 of the processing unit 5 form Beauftschungsorgane, wherein the punch 4 is formed as a hollow organ and has a punch cavity 9 as an organ cavity.
  • the punch cavity 9, like the mandrel 7, has a circular cross-section.
  • the cross-sectional size of the punch cavity 9 exceeds the cross-sectional size of the mandrel 7 minimally.
  • a motor drive unit 10 By means of a motor drive unit 10, the punch 4 can be moved along a movement axis 11.
  • a motor drive unit 12 serves to move the processing unit 5 along the movement axis 11.
  • Both in the motor drive unit 10 and in the motor drive unit 12 is in the illustrated example, a hydraulic drive of conventional design.
  • the motor drive units 10, 12 form a motor drive 13 for the punch 4 and the processing unit 5 and thus for the pressure piece 6 and the mandrel 7.
  • a programmable numerical control 14 of the motor drive 13 and the motor drive units 10, 12 is in Figure 1A hinted at.
  • the forming tool 16 is in all of FIGS. 1A to 8B shown, while the remaining parts of the forming machine 1 for the sake of simplicity only in Figure 1A are shown.
  • the reinforcement 15 has a receptacle 17 with a receiving wall 18.
  • the receiving wall 18 extends parallel to the movement axis 11 of the punch 4 and the processing unit 5 and comprises a first part length 19 and a subsequent to the first part length 19 along the axis of movement 11 and compared to the first part length 19 with extension of the receptacle 17 radially outwardly offset second part length 20.
  • the second part length 20 of the receiving wall 18 defines an alternative space 21 of the reinforcement 15.
  • the relevant drawing detail "A" of Figure 1A is in FIG. 1B shown enlarged.
  • the forming tool 16 serves as a device for sectionwise thickening of a plastically deformable hollow body wall of a hollow body, in the illustrated example for the sectional thickening of a plastically deformable steel wall 22 of a hollow shaft 23.
  • the wall 22 defines a circular cross-section cavity of the hollow shaft 23.
  • the axis of movement 11 coincides with the cavity axis of the cavity and defines with its course an axial direction.
  • FIGS. 1A to 4B illustrate the sequence of a first by means of the forming machine 1 or by means of the forming tool 16 feasible method for sectionwise thickening of the wall 22 of the hollow shaft 23.
  • modified methods are based on the FIGS. 5A to 8B as well as on the basis of FIGS. 9A to 12B explained.
  • the different process stages are in each case shown both with an overall view of the forming tool 16 and with an enlarged drawing detail "A".
  • the numbering of the overall views has the addition A, the numbering of the enlarged drawing details is provided with the addition B.
  • the hollow shaft 23 located in the undeformed state is pushed from the side of the punch 4 in the axial direction (along the movement axis 11) into the receptacle 17 of the reinforcement 15 and thereby onto the mandrel 7 of the processing unit 5 already arranged in the receptacle 17 ,
  • the punch 4 is reset at this time with respect to the reinforcement 15 in the axial direction.
  • the processing unit 5 takes against the armor 15 in the axial direction in the Figures 1A . 5A shown position.
  • the wall 22 of the hollow shaft 23 has in the illustrated example an annular cross-section.
  • the outer diameter of the wall 22 corresponds to the diameter of the receptacle 17 on the reinforcement 15 and coincides with the diameter of the pressure piece 6 of the processing unit 5.
  • the inner diameter of the wall 22 corresponds to the diameter of the mandrel 7 of the processing unit 5.
  • the inserted into the receptacle 17 of the reinforcement 15 hollow shaft 23 is therefore seated in the radial direction without play on the mandrel 7.
  • the wall 22 of the hollow shaft 23 of the receiving wall 18 of the receptacle 17 is closely adjacent. In the axial direction, the hollow shaft 23 rests with a radial end face 24 of the wall 22 on the shoulder 8 of the pressure piece 6 running around the axis of movement 11.
  • the punch 4 is delivered by means of the motor drive 13 and the motor drive unit 10 in the axial direction to the hollow shaft 23 until a radial end face 25 of the punch 4 at a radial end face 26 of the wall 22 of the hollow shaft 23 for System comes and the hollow shaft 23 is thus clamped with a magnitude small force between the pressure piece 6 and the shoulder 8 of the processing unit 5 on the one hand and the punch 4 on the other hand in the axial direction.
  • the mandrel 7 runs in the movement of the punch 4 with its remote from the pressure piece 6 end in the axial direction in the die cavity 9 a.
  • the feed movement of the punch 4 which is carried out by means of the motor drive 13 or the motor drive unit 10, can be both path-controlled and force-controlled by the numerical control 14.
  • a path-dependent control of the punch 4 is moved starting from its initial position over a defined path length in the axial direction.
  • force-dependent control the force increase in the drive train of the punch 4, which results when the punch 4 with the radial end face 25 runs onto the radial end face 26 of the wall 22 of the hollow shaft 23, marks the end of the feed movement.
  • the described feed movement of the punch 4 is equally in the context of the method according to the FIGS. 1A to 4B and in the context of the procedure under FIGS. 5A to 8B executed.
  • the resulting at the end of the feed movement of the punch 4 ratios are in the FIGS. 1A, 1B and in the FIGS. 5A, 5B shown. Different from each other are the subsequent procedures.
  • the mandrel 7 acts as an inner support body for the wall 22 of the hollow shaft 23 and the axis-parallel lateral surface of a support body surface or a inner support surface for the wall 22 forms and supported with this surface, the wall 22 of the hollow shaft 23 in the radial direction.
  • the first part length 19 of the receiving wall 18 acts on the outer side of the wall 22 .
  • the first part length 19 of the receiving wall 18 forms an outer support surface for the wall 22 running parallel to the wall 22 and accordingly supports the wall 22 of the hollow shaft 23 likewise in the radial direction from.
  • the compression movement that is, the movement performed by the pressure piece 6 relative to the stationary die 4 of the forming tool 16 in the axial direction, ends as soon as the escape space 21 of the reinforcement 15 is filled to form a thickening 27 of the wall 22 with plasticized material of the wall 22 and thus the method stage according to the FIGS. 2A, 2B is reached.
  • both a displacement control and a force control is conceivable.
  • path control requires the deposit of an example empirically determined travel length of the pressure piece 6 in the numerical control 14 of the motor drive 13. As soon as the pressure piece 6 in the axial direction on has moved the predetermined path length, the motor drive unit 12 used to move the pressure piece 6 is stopped.
  • the motor drive unit 12 is switched off for the pressure piece 6 as soon as by means of a corresponding sensor on the motor drive unit 12 of that increase in the motor drive force is detected, which occurs when the escape space 21 of the reinforcement 15 with plasticized material of Wall 22 is filled and a further feed of the hollow shaft 23 is thus blocked in the axial direction.
  • the punch 4 is steered away by means of the motor drive unit 10 with respect to the radial end face 26 of the wall 22 of the hollow shaft 23 in the axial direction by the path length over which the thickening 27 of the wall 22 in the subsequent forming process in the axial direction should extend.
  • the motor drive unit 10 is stopped and by means of the motor drive unit 12 a new upsetting movement of the type described above is performed.
  • the pressure piece 6 again steered away or force-controlled in the axial direction relative to the stationary in this direction punch 4, until due to the previous withdrawal movement of the punch 4 enlarged escape space 21 of the reinforcement 15 again completely with plasticized material of the wall 22 of the hollow shaft 23 is filled and thus the conditions according to the FIGS. 3A, 3B have resulted.
  • the procedure is repeated until the thickening 27 produced on the wall 22 of the hollow shaft 23 has the desired length in the axial direction.
  • the pressure piece 6 is above the mandrel 7 in the interior of the punch cavity 9 guided in the axial direction.
  • a thickening 27 is constructed in the escape space 21 of the reinforcement 15 on the wall 22 of the hollow shaft 23, which extends on the outside wave-shaped in the axial direction.
  • the waveform can be leveled.
  • the punch 4 in the axial direction relative to the reinforcement 15 at high speed to the starting position, which he had taken before the beginning of the forming process, moved back.
  • the machining unit 5 is advanced by actuating the motor drive unit 12 together with the seated on the mandrel 7 hollow shaft 23 in the axial direction until the hollow shaft 23 at least partially disposed outside of the reinforcement 15 and thereby accessible for removal from the forming tool 16.
  • clamping shells 28, 29 are used, as in FIG. 4A are shown very schematically.
  • the clamping shells 28, 29 in the radial direction of the formed hollow shaft 23 in the direction of in FIG. 4a shown double arrows are delivered.
  • the clamping shells 28, 29 are moved in the radial direction of the hollow shaft 23 until they clamp the hollow shaft 23 behind the thickening 27.
  • the processing unit 5 is moved back in the axial direction and thereby the mandrel 7 is pulled out of the interior of the hollow shaft 23.
  • the mandrel 7 has the hollow shaft cavity Leave 23, the deformed hollow shaft 23 can be removed by means of the clamping shells 28, 29 from the forming machine 1.
  • the clamping shells 28, 29 in the axial direction can be moved and / or pivotally. With a corresponding movement of the clamping shells 28, 29 in the opposite direction can then insert a still undeformed hollow shaft in the forming machine 1 and the forming tool 16 for initiating a further forming process of the type described above.
  • the joint movement of the punch 4 and the pressure piece 6 joins seamlessly to the first movement phase, in which only the pressure piece 6 is moved in the axial direction.
  • Plasticized material of the wall 22 flows steadily into the escape space 21. In this way, the thickening 27 is created over the desired axial length at the relevant axial end of the wall 22 of the hollow shaft 23.
  • the wall 22 is supported on its inside, by the first part length 19 of the receiving wall 18 on its outer side in the radial direction.
  • the executed as a continuous compression movement relative movement of the punch 4 and the pressure member 6 and the same time carried out with the compression movement relative movement between the punch 4 and the pressure piece 6 on the one hand and the stationary in the axial direction reinforcement 15 on the other hand are controlled so that in the course of Forming process in the axial direction extending escape space 21 of the reinforcement 15 is permanently filled with plastic material of the wall 22 is completely filled.
  • the thickening 27 is created over its entire axial length with a flat in the axial direction and the wall of the escape space 21 exactly imaging axis-parallel outer surface.
  • FIGS. 7A, 7B is the thickening 27 on the wall 22 of the hollow body 23 relative to the proportions according to the FIGS. 6A, 6B extended in the axial direction, the final length of the thickening 27 has not yet been reached. With its final axial length, the thickening 27 at the respective axial end of the wall 22 of the hollow shaft 23 in the Figures 8A, 8B shown.
  • the speed of the punch 4 is increased by appropriate control of the motor drive unit 10 such that the speed of the punch 4 exceeds the speed of the pressure piece 6.
  • the deformed hollow shaft 23 is pushed out of the reinforcement 15 by the processing unit 5, which continues to move in the axial direction, unchanged.
  • the arranged outside the reinforcement 15 hollow shaft 23 may in the manner described above by means of the in Figures 8A, 8B Not shown clamping shells 28, 29 detected and removed from the forming tool 16 and from the forming machine 1.
  • a hollow shaft 23 to be machined can then be fed to the forming tool 16 by means of the clamping shells 28, 29.
  • the compression movement performed by the punch 4 and the pressure piece 6 can be superimposed by an axial movement performed by the reinforcement 15 in the axial direction relative to the punch 4 and the pressure piece 6.
  • the extension of the escape space 21 on the reinforcement 15 in the axial direction and the bulge due to the compression movement of the punch 4 and the pressure piece 6 in the escape space 21 building up thickening 27 increases on the wall 22 of the hollow shaft 23 can length in the axial direction.
  • FIGS. 9A to 12B illustrated method is in its basic procedures with the method according to the FIGS. 1A to 4B and according to the FIGS. 5A to 8B match.
  • a wall 22 of a hollow shaft 23 is plasticized by an upsetting movement of a punch 4 and a pressure piece 6 along an axis of movement 11 in an axial direction, and plasticized material of the wall 22 builds up a thickening 27.
  • FIGS. 9A to 12B Notwithstanding the methods according to the FIGS. 1A to 4B and 5A to 8B is used in the context of the procedure under FIGS. 9A to 12B a thickening 27 at both axial ends of the wall 22 and the hollow body 23 is generated.
  • a forming tool 30 is used, although not in principle but in constructive details of the forming tool 16 of FIGS. 1A to 8B different.
  • the forming tool 30 has a multi-part reinforcement 31 as an outer shape.
  • the reinforcement 31 is divided in both the radial direction and the axial direction. Due to the division in the radial direction, the reinforcement 31 comprises a first axial outer shaped part in the form of a first armoring unit 32 and a second axial outer shaped part in the form of a second armoring unit 33.
  • the first armoring unit 32 in turn is in the axial direction to form two lateral contemplatform- or Arming parts 34, 35 divided.
  • the parting line between the two lateral reinforcing parts 34, 35 of the first reinforcing unit 32 extends in Figure 9A perpendicular to the plane of the drawing along the movement axis 11.
  • a division of the first armoring unit 32 in more than two, in particular in four or six lateral conveyform supportive mecanic armoring, is conceivable.
  • the second reinforcing unit 33 of the reinforcement 31 is integrally formed.
  • the first armoring unit 32 has the first part length 19 of the receiving wall 18 and a transitional area between the first part length 19 of the receiving wall 18 and the part of the escape space 21 provided on the second arming unit 33.
  • FIGS. 9A, 9B illustrated stage of the performed by means of the forming tool 30 forming process at a axial end of the hollow shaft 23 already a thickening 27 has been created.
  • the forming process in question corresponded in its course one of the above to the FIGS. 1A to 4B and 5A to 8B explained method.
  • the multi-part forming tool 30 was used as the one-piece forming tool 16 of FIGS. 1A to 8B ,
  • the punch 4 of the forming die 30 was moved in the axial direction to a position away from the reinforcement 31.
  • the provided with a thickening 27 hollow shaft 23 was removed from the reinforcement 31.
  • the first mandrel 7 by a corresponding axial movement of the processing unit 5 from the interior of the hollow shaft 23 (in Figure 9A pulled down).
  • the thickening 27 projecting in the radial direction in relation to the first part length 19 of the receiving wall 18, the hollow shaft 23 was supported on the upper side of the first reinforcing unit 32.
  • the lateral reinforcing members 34, 35 of the first reinforcing unit 32 were moved apart in the radial direction so far that it was possible to pull the bulge 27 in the axial direction out of the escape space 21 on the second reinforcing unit 33 and that the hollow shaft 23 with the Thickening 27 could pass the first armor unit 32 with a movement in the axial direction.
  • the hollow shaft 23 was then rotated by 180 degrees and pushed with the one-sided thickening 27 ahead on the mandrel 7 of the processing unit 5. Together with the mounted on the mandrel 7 and mounted in the axial direction on the pressure piece 6 hollow shaft 23, the processing unit 5 was then inserted in the axial direction in the still open first armor unit 32.
  • the first reinforcing unit 32 was then closed by a corresponding relative movement of the lateral reinforcing members 34, 35 in the radial direction. Finally, by a movement of the punch 4 of the forming tool 30, the unilaterally formed hollow shaft 23 is clamped with an absolute low force between the pressure piece 6 and the shoulder 8 of the processing unit 5 on the one hand and the punch 4 on the other hand in the axial direction. This resulted in the conditions according to the FIGS. 9A, 9B ,
  • the hollow shaft 23 is removed from the reinforcement 31 and then removed from the forming tool 30 and the forming machine 1.
  • the sequences in the removal of the hollow shaft 23 with wall 22 formed on both sides correspond to the sequences described above in detail during the removal of the hollow shaft 23, which has been shaped only at one axial end.
  • Both the one-sided and the hollow shaft 23 formed at both axial ends can be subjected to post-processing as part of a manufacturing process.
  • post-processing as part of a manufacturing process.
  • special functional devices such as a thread or a gear teeth, are created.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
EP17150435.0A 2017-01-05 2017-01-05 Procédé et dispositif pour épaissir locallement un corps creux Active EP3345694B1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP17150435.0A EP3345694B1 (fr) 2017-01-05 2017-01-05 Procédé et dispositif pour épaissir locallement un corps creux
CA2990655A CA2990655C (fr) 2017-01-05 2018-01-02 Methode et dispositif servant a epaissir une paroi de corps creux d'un corps creux deformable plastiquement, en particulier en portions, et methode de fabrication et machine de production d'un corps creux
KR1020180000318A KR102190176B1 (ko) 2017-01-05 2018-01-02 중공 몸체의 소성 변형 가능한 중공 몸체 벽을, 특히 부분적으로, 두껍게 하기 위한 방법 및 장치, 그리고 중공 몸체를 생산하기 위한 제조 방법 및 기계
US15/860,878 US11007564B2 (en) 2017-01-05 2018-01-03 Method and device for thickening a plastically deformable hollow body wall of a hollow body, in particular in portions, and manufacturing method and machine for producing a hollow body
JP2018000196A JP6698713B2 (ja) 2017-01-05 2018-01-04 中空体の塑性変形可能な中空体壁を特に部分的に厚肉化するための方法および装置ならびに中空体を製造するための製造方法および機械
CN201810010668.2A CN108356207B (zh) 2017-01-05 2018-01-05 可塑化变形空心体壁尤其区段加厚方法设备制造方法机器
US17/232,276 US11890667B2 (en) 2017-01-05 2021-04-16 Method and device for thickening a plastically deformable hollow body wall of a hollow body, in particular in portions, and manufacturing method and machine for producing a hollow body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17150435.0A EP3345694B1 (fr) 2017-01-05 2017-01-05 Procédé et dispositif pour épaissir locallement un corps creux

Publications (2)

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EP3345694A1 true EP3345694A1 (fr) 2018-07-11
EP3345694B1 EP3345694B1 (fr) 2024-05-22

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US (2) US11007564B2 (fr)
EP (1) EP3345694B1 (fr)
JP (1) JP6698713B2 (fr)
KR (1) KR102190176B1 (fr)
CN (1) CN108356207B (fr)
CA (1) CA2990655C (fr)

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Also Published As

Publication number Publication date
US11007564B2 (en) 2021-05-18
KR20180080997A (ko) 2018-07-13
EP3345694B1 (fr) 2024-05-22
JP6698713B2 (ja) 2020-05-27
JP2018108606A (ja) 2018-07-12
US11890667B2 (en) 2024-02-06
CN108356207B (zh) 2021-02-19
KR102190176B1 (ko) 2020-12-11
CA2990655C (fr) 2020-12-29
CA2990655A1 (fr) 2018-07-05
US20210229160A1 (en) 2021-07-29
CN108356207A (zh) 2018-08-03
US20180185901A1 (en) 2018-07-05

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