EP0888833A1 - Verfahren und Vorrichtung zum unterschiedlichen und/oder nacheinanderfolgenden Stanzen in mindestens zwei unterschiedlichen Richtungen - Google Patents

Verfahren und Vorrichtung zum unterschiedlichen und/oder nacheinanderfolgenden Stanzen in mindestens zwei unterschiedlichen Richtungen Download PDF

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Publication number
EP0888833A1
EP0888833A1 EP97810444A EP97810444A EP0888833A1 EP 0888833 A1 EP0888833 A1 EP 0888833A1 EP 97810444 A EP97810444 A EP 97810444A EP 97810444 A EP97810444 A EP 97810444A EP 0888833 A1 EP0888833 A1 EP 0888833A1
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EP
European Patent Office
Prior art keywords
stamping
axis
main
along
oblique
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.)
Withdrawn
Application number
EP97810444A
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English (en)
French (fr)
Inventor
Jean Pierre Rieben
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.)
Humard Automation SA
Original Assignee
Humard Automation SA
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 Humard Automation SA filed Critical Humard Automation SA
Priority to EP97810444A priority Critical patent/EP0888833A1/de
Publication of EP0888833A1 publication Critical patent/EP0888833A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02—Stamping using rigid devices or tools
    • B21D22/06—Stamping using rigid devices or tools having relatively-movable die parts

Definitions

  • the present invention relates to cold stamping machining of complex parts with sections of different volumes and in particular a differential press and / or stamping process and press sequential.
  • the part fixed in a matrix undergoes the action of a punch which deforms a portion of it.
  • the portion of the part surrounding that undergoing the action of the punch also deforms, tending in particular to extend by creep in directions different from that of the action of the punch, whence difficulties in controlling exactly the room dimensions.
  • the work hardening of the material in the immediate vicinity of the stamping is very high, which greatly limits the deformation capacity machining of the part.
  • stamping operations successive are necessary, especially when you want to stamp the piece in two opposite directions of the same stamping axis or in two different stamping axes.
  • stamping operations requires its own tools, even its own press, and requires finishing stamping operations in order to compensate for the deformations undergone by the part during the various previous stamping operations.
  • Such manufacturing process is therefore expensive due to the numerous tools and presses as well as the many operations required.
  • a first object of the invention is to propose a method differential and / or sequential stamping in at least two directions different, free from the drawbacks mentioned, i.e. by which the geometry of the part is better controlled and in which the work hardening is decreased which allows a significant increase in the deformation capacity machining, making it possible to significantly reduce or even eliminate the need of subsequent recoveries.
  • a second object of the invention is to propose a method different and / or sequential stamping allowing at least two stamping operations along two different axes.
  • Another object of the invention is to propose a stamping press equipped for carrying out the method according to the invention.
  • the technology used can be hybrid, that is to say, servo control means mechanical, electrical or electronic can implement differential, simultaneous or sequential type actuators hydraulic and / or mechanical.
  • a stamping press, as described in claim 9 allows in particular to carry out the process described in claim 1, then that a stamping press as described in claim 10 allows carry out in particular the method of claim 2.
  • Variant embodiments said presses are described in claims 11 to 19.
  • the differential and / or sequential stamping method according to the invention essentially consists of a second stamping, or subsequent stamping, along the same stamping axis as the first stamping or along different axes, while the stamping pressure is always applied to the stamping tools having carried out the stamping prior to the one that is currently being made. Alternatively, the different operations stamping are carried out simultaneously. In this way, the creep of the material is more pronounced and better controlled, which significantly improves the machining precision and work hardening being reduced, the capacity of deformation machining is increased.
  • Figure 1 shows a section of a portion of a shape preferential execution of a stamping press according to the invention in the state open, or ready to receive a stamping piece 7.
  • the press will be considered a vertical press, i.e. the main axis stamping, identified by X in the figures, here corresponds to the vertical axis.
  • a secondary stamping is also carried out according to a axis, identified by Y in the figures, perpendicular to the main axis, i.e. here a horizontal axis.
  • Y perpendicular to the main axis
  • the stamping press 1 comprises in particular a sole fixed lower 2 supporting a matrix holder body 20 containing the matrix lower 21.
  • the lower extractor 30 comprises a central stop 31 which can be coupled to a lower extraction core 32 movable vertically in a core chamber 33. It is understood by comparing Figures 1 and 2, that the downward movement of the lower extraction core 32 is limited by the bottom wall of chamber 33 and that it can be decoupled from the stop central 31.
  • the matrix holder 20 also includes one or more housings 22 for one or more drawers 4, each being able to move in said housing 22 along one or more axes other than the X axis.
  • the drawer (s) 4 are provided to move according to a Y axis perpendicular to the main stamping axis X of the press, i.e. horizontally, this in a way that will be explained below.
  • Press 1 further includes a set of upper cylinders consisting of a first upper cylinder 6, the slave cylinder in the form shown, supporting a punch holder 60 via a fixing spacer 61 of known technique and to which the pivot is fixed 62 as well as the punch 63, as well as a second upper cylinder 5, the master cylinder in the embodiment shown, to which a second punch 50 is fixed by fixing spacers 51.
  • Spacers 51, 61 are designed and sized to withstand the lifting forces generated by the punches 50, 60 and 63.
  • Spring extraction means 64 fixed on the punch holder 60, free the stamped part from the pivot 62 according to a known technique.
  • the first punch 63 is the stamping punch, it therefore includes on its lower surface the reliefs necessary for stamping of the part to be stamped 7 disposed in the hollow portion separating the die lower 21 of the punch 63 as will be seen later.
  • the second punch 50 is used to activate the drawer (s) 4.
  • Each drawer 4 is preferably provided with two portions of surfaces inclined 40 and 41, arranged on opposite sides of the drawer, the angle of inclination of said surfaces preferably being 45 °.
  • the first portion of inclined surface 40 is disposed opposite another surface portion inclined 34 arranged on the lower extractor 30 (see Figure 1).
  • the second portion of inclined surface 41 is arranged opposite another portion of inclined surface 52 arranged on the second punch 50 (see FIG. 2).
  • each drawer 4 is moved in a movement towards the center by sliding the portion of surface 41 on the surface portion 52 (see Figure 3). So by a movement in a first direction of the main stamping axis X, ie downwards in the case considered here, of the punch 50, a movement is printed according to a first direction of a Y axis perpendicular to said main axis, i.e.
  • each drawer 4 a movement going towards the center in the case considered here, of each drawer 4, whereas by a movement in a second direction of the main axis stamping X, i.e. upwards in the case considered here, of the extractor lower 30, we print a movement in a second direction of the axis Y perpendicular to said main axis, or outward in the case considered here, from each drawer 4.
  • the direction transformation of the movements described is obtained by the assistance of the portions of surfaces 34 and 40 as well as 41 and 52.
  • the movement of each drawer 4, as just described allows a stamping of the part to be stamped 7 in a direction Y perpendicular to the axis main stamping X thanks to one or more stamping horns 42 making projection on each drawer 4.
  • each surface portion 34,40,41,52 has been described as being 45 °.
  • Other angle values can be chosen, taking into account the pressure required for stamping, the pressure that can be applied in cylinders 5 and 6 as well as amplitudes of the various movements described. It is not even necessary that the angles of the portions of surfaces 40 and 41 are equal, provided that the angles of the portions of surfaces which correspond to them are adapted. In particular, in case the stamping depths are different for two drawers 4, the angles of the oblique surfaces can be adapted by result.
  • Figure 1 shows the press stamping unit 1 open to receive a part to be stamped 7.
  • the two upper cylinders 5 and 6 are in the high position, leaving room to place the part to be stamped 7 in the housing of the lower die 21.
  • the lower extractor 30 is in the high position, pushing the extractor core 32 upwards, for depositing the part to be stamped 7 on the upper surface of extractor 32.
  • the punch holder 60 has been lowered so that the core 62 and the punch 63 come press part 7 and stamp it.
  • extractor 30 was lowered leaving the extractor core 32 in abutment on the underside of the core chamber 33. Since the upper face of the extractor core 32 is prominent relative to the lower surface of the part to be stamped 7 housed in the bottom of the hollow housing of the lower die 21, there is a stamping simultaneous in two opposite directions of the main stamping axis X, here the vertical axis, of the part 7 by the core 62 and the punch 63 as well as by the extractor core 32 in the matrix composed of the lower matrix 21 and of the upper punch 63 which have closed.
  • FIG. 3 shows the next step.
  • the punch holder 60 respectively the core 62 and the extractor core 32 have not varied of position.
  • the external punch 50 continued its movement lowering.
  • the drawers 4 in contact by their portions of oblique surfaces 41 with the portions of surfaces corresponding obliques 52 of the punch 50, were pushed by said portions of oblique surfaces and have moved towards the center at inside the housings 22.
  • the horn or horns stamping 42 of each drawer 4 enter the die, respectively stamp piece 7 along a Y axis perpendicular to the main axis stamping X, or here horizontally.
  • the next step, visible in Figure 7, is to identify completely the set of upper cylinders which return to the position shown in Figure 1.
  • the clearance of the stamped part 7 of the core 62 was done in a known manner by the spring extractors 64.
  • the matrix 21 and the punch 63 is now open, the stamped part 7 can be removed, manually or by known automatic means.
  • the stamping press described above as an embodiment preferential of the invention makes it possible to deploy considerable efforts according to two perpendicular stamping directions, thanks only to the action two upper cylinders 5 and 6 as well as means for transmitting movement and effort described.
  • the press is constructed so as to generate symmetrical efforts around of the main stamping axis, this in order to limit the torsional stresses and of sag in the different elements.
  • the second cylinder 5 will be made up of a master cylinder outside while the first cylinder 6 will be constituted as a secondary cylinder interior or slave cylinder, coaxial with said master exterior cylinder.
  • the angle between the main angle stamping X and the secondary stamping angle Y is a right angle. He is everything quite possible to also have an angle between these two axes different from the angle straight, the sliding of the drawer (s) 4 then taking place obliquely relative to the main axis X. A variant comprising several drawers 4 is moving obliquely at different angles is also possible. In all these cases, however, care will be taken to balance efforts as best as possible. forwarded to the press.
  • each drawer could just as easily be driven by its own cylinder acting perpendicularly or obliquely by relative to the main stamping axis.
  • other means than those described can be envisaged, for example mechanical or hydraulic means.
  • the application of the effort by the slave cylinder 6 can be made differently from what has been described here, the connection between the master cylinder 5 and the slave cylinder 6 can be only mechanical, for example be carried out by one or more cams or knee pads.
  • the press described is controlled by a control unit, not shown, able to independently control each operation stamping, differentially, simultaneously or sequentially. So we have a sinusoidal type control in which the displacement, the speed and the acceleration of each movement is controlled so independent.
  • the press described makes it possible to carry out simultaneously a first stamping in a first direction of a first X axis by the punch 62 and the die 63, a second stamping according to a opposite direction of the same axis by the extractor core 32 as well as two or several other stampings in two or more opposite directions on one or more Y axes different from said first axis, using the horns stamping 42 of the drawers 4.
  • the press as well as the process which have been described relate to two vertical stampings and at least two stampings simultaneous horizontal, we could have, according to the needs of the room to stamp, only two simultaneous vertical stampings or only one vertical stamping and the two (or more) horizontal or oblique stampings.
  • the constitution of the press would be simplified compared to that described here, the necessary modifications being within the reach of the skilled person.
  • a possibility has also been described where there is only one horizontal stamping in addition to the or vertical stamping.
  • Such a process as described, carried out using a press as described, allows machining by stamping parts, in particular watch cases, with a much more complicated shape and / or structure than was possible until now, at a significantly reduced cost.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
EP97810444A 1997-07-04 1997-07-04 Verfahren und Vorrichtung zum unterschiedlichen und/oder nacheinanderfolgenden Stanzen in mindestens zwei unterschiedlichen Richtungen Withdrawn EP0888833A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP97810444A EP0888833A1 (de) 1997-07-04 1997-07-04 Verfahren und Vorrichtung zum unterschiedlichen und/oder nacheinanderfolgenden Stanzen in mindestens zwei unterschiedlichen Richtungen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP97810444A EP0888833A1 (de) 1997-07-04 1997-07-04 Verfahren und Vorrichtung zum unterschiedlichen und/oder nacheinanderfolgenden Stanzen in mindestens zwei unterschiedlichen Richtungen

Publications (1)

Publication Number Publication Date
EP0888833A1 true EP0888833A1 (de) 1999-01-07

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EP97810444A Withdrawn EP0888833A1 (de) 1997-07-04 1997-07-04 Verfahren und Vorrichtung zum unterschiedlichen und/oder nacheinanderfolgenden Stanzen in mindestens zwei unterschiedlichen Richtungen

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0962269A2 (de) * 1998-06-03 1999-12-08 Federal-Mogul Wiesbaden GmbH Verfahren und Vorrichtung zur Herstellung von Bundlagern
CN102303460A (zh) * 2011-08-16 2012-01-04 吴江市吴刚冲压机械有限公司 刻字模具
CN101767148B (zh) * 2009-12-30 2012-05-23 吉林省元隆达工装设备有限公司 向上折边斜楔机构
CN112355114A (zh) * 2020-09-29 2021-02-12 九江新恒机械制造有限公司 一种可快速调整角度的汽车冲压结构
CN115229014A (zh) * 2022-09-22 2022-10-25 山东瑞博电机有限公司 一种三相异步电动机固定支架成型加工设备
CN115582462A (zh) * 2022-11-23 2023-01-10 常熟中信建材有限公司 一种中空镶嵌玻璃固定金属框成型设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3820369A (en) * 1973-02-26 1974-06-28 H Tominaga Hydraulic press
JPS5868431A (ja) * 1981-10-17 1983-04-23 Toyoda Autom Loom Works Ltd プレス加工用複合型
EP0572301A1 (de) * 1992-05-27 1993-12-01 Isoform Tiefziehvorrichtung zum Ziehen von blattförmigem Material in einer elastischen Verformungsmatrize
EP0739663A2 (de) * 1995-04-24 1996-10-30 Trumpf GmbH & Co Bearbeitungsmaschine zum Umformen von Werkstücken

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3820369A (en) * 1973-02-26 1974-06-28 H Tominaga Hydraulic press
JPS5868431A (ja) * 1981-10-17 1983-04-23 Toyoda Autom Loom Works Ltd プレス加工用複合型
EP0572301A1 (de) * 1992-05-27 1993-12-01 Isoform Tiefziehvorrichtung zum Ziehen von blattförmigem Material in einer elastischen Verformungsmatrize
EP0739663A2 (de) * 1995-04-24 1996-10-30 Trumpf GmbH & Co Bearbeitungsmaschine zum Umformen von Werkstücken

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0962269A2 (de) * 1998-06-03 1999-12-08 Federal-Mogul Wiesbaden GmbH Verfahren und Vorrichtung zur Herstellung von Bundlagern
EP0962269A3 (de) * 1998-06-03 2002-02-06 Federal-Mogul Wiesbaden GmbH & Co.KG Verfahren und Vorrichtung zur Herstellung von Bundlagern
CN101767148B (zh) * 2009-12-30 2012-05-23 吉林省元隆达工装设备有限公司 向上折边斜楔机构
CN102303460A (zh) * 2011-08-16 2012-01-04 吴江市吴刚冲压机械有限公司 刻字模具
CN112355114A (zh) * 2020-09-29 2021-02-12 九江新恒机械制造有限公司 一种可快速调整角度的汽车冲压结构
CN112355114B (zh) * 2020-09-29 2022-09-16 九江新恒机械制造有限公司 一种可快速调整角度的汽车冲压结构
CN115229014A (zh) * 2022-09-22 2022-10-25 山东瑞博电机有限公司 一种三相异步电动机固定支架成型加工设备
CN115229014B (zh) * 2022-09-22 2022-11-29 山东瑞博电机有限公司 一种三相异步电动机固定支架成型加工设备
CN115582462A (zh) * 2022-11-23 2023-01-10 常熟中信建材有限公司 一种中空镶嵌玻璃固定金属框成型设备
CN115582462B (zh) * 2022-11-23 2023-03-14 常熟中信建材有限公司 一种中空镶嵌玻璃固定金属框成型设备

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