EP2900399A1 - Machine-outil et procédé d'usinage d'une pièce à usiner - Google Patents

Machine-outil et procédé d'usinage d'une pièce à usiner

Info

Publication number
EP2900399A1
EP2900399A1 EP13802851.9A EP13802851A EP2900399A1 EP 2900399 A1 EP2900399 A1 EP 2900399A1 EP 13802851 A EP13802851 A EP 13802851A EP 2900399 A1 EP2900399 A1 EP 2900399A1
Authority
EP
European Patent Office
Prior art keywords
tool
workpiece
forging
machine tool
machining
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Withdrawn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
EP13802851.9A
Other languages
German (de)
English (en)
Inventor
Herbert Maringer
Reinhard KOLL
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.)
WFL Millturn Technologies GmbH and Co KG
Original Assignee
WFL Millturn Technologies GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by WFL Millturn Technologies GmbH and Co KG filed Critical WFL Millturn Technologies GmbH and Co KG
Publication of EP2900399A1 publication Critical patent/EP2900399A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B21J5/002—Hybrid process, e.g. forging following casting
    • 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
    • B21J5/008—Incremental forging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P23/00—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass
    • B23P23/04—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass for both machining and other metal-working operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P9/00—Treating or finishing surfaces mechanically, with or without calibrating, primarily to resist wear or impact, e.g. smoothing or roughening turbine blades or bearings; Features of such surfaces not otherwise provided for, their treatment being unspecified
    • B23P9/04—Treating or finishing by hammering or applying repeated pressure
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C14/00—Alloys based on titanium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
    • C22F1/18—High-melting or refractory metals or alloys based thereon
    • C22F1/183—High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
    • C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface

Definitions

  • the invention relates to a machine tool and a method for machining a workpiece into a finished part, in which the workpiece is clamped in a machine tool and machined with a tool having a geometrically determined cutting edge and attached to a multi-axially movable tool holder of the machine tool ,
  • DE 69422599T2 proposes to intensively cool the cutting tips of the tool and the workpiece in the region of its machining with lubricating fluid - all the more so when forged high-strength workpieces to finished parts, such as engine, suspension or supporting structural components,
  • the cutting depth varies comparatively frequently and therefore cutting data for the machining process are difficult to set.
  • unfavorable cutting data can lead to considerable thermo-mechanical stresses in the region of the workpiece edge zone, which can subsequently lead to undesirable mechanical properties on the finished part.
  • an incremental cold forging method is known from the prior art (DE102009025621 B4), in which a metallic component is provided with a hardened surface.
  • the forging tool used for this purpose can be guided by a robot or by a machine tool.
  • the object of the invention is to provide a method for the machining of high-strength workpieces, which ensures short machining times and, moreover, can ensure a high degree of shape and dimensional accuracy on the finished part.
  • the machining process for example, with forged workpieces from a Ti-5AI-5V-5Mo-3Cr alloy (Ti-5553) with a hardness of about 40 HRC or a strength over 1200 N / mm2 cope, without thereby affecting the fatigue strength of the workpieces ,
  • the invention achieves the stated object with regard to the method in that the workpiece is cold forged incrementally after its machining and while maintaining this clamping at least partially by means of a forging tool to the finished part.
  • the workpiece is incrementally cold-forged at least partially by means of the forging tool after its machining, the requirements for the cutting finishing, in particular for a Fine grinding, of the workpiece, because with this cold micro forging technique the required dimensional and dimensional accuracy of the finished part can be ensured.
  • consistent process settings can be utilized in the completion of the high-strength workpiece on the machine tool for the separation and subsequent forming.
  • the integrated manufacturing process of the machine tool therefore does not have to be abandoned, so that faster processing times and thus shorter throughput times can always be expected compared to the state of the art.
  • the heating on the workpiece can be kept within narrow limits, which can avoid impairments in its fatigue strength.
  • the method according to the invention can therefore also reproducibly ensure a comparatively high dimensional and dimensional accuracy on the finished part.
  • the method according to the invention can be particularly distinguished when a forged workpiece is machined. Especially when hiebei the workpiece made of titanium or a titanium alloy and thus represents a high-strength workpiece.
  • the method according to the invention can allow the workpiece to be machined by machining with the tool and to be cold forged incrementally immediately after this hard machining. Even high-strength workpieces with a hardness above 40 HRC (hardness according to Rockwell, scale C) can thus be processed into finished parts, even if their depth of cut varies comparatively frequently, which may be the case for example due to inaccuracies on the workpiece due to a previous forging process.
  • An additional post-treatment of the workpiece edge zone which may be required due to suboptimal cutting data during the machining of hard machining, is now achieved by the method according to the invention. possible cold forging possible. It may also be advantageous if the workpiece is incrementally cold-forged immediately after the machining. This can be avoided, for example, the risk of undesirable storage-related work hardening on the workpiece, which can further increase the dimensional and dimensional accuracy of the finished part.
  • Hard milling and / or hard turning can be particularly advantageous in the case of the aforementioned hard machining.
  • the cutting tool of the tool holder is replaced by a forging tool for the incremental cold forging, the workpiece can be finished with a reduced control effort.
  • a cost saving in the manufacturing method according to the invention can thus arise.
  • the sequence of operations can be further optimized if the workpiece is machined in a single clamping on the machine tool to the finished part.
  • this also the risk of damage to the workpieces during the work sequence, for example, by transport, new clamping, etc. can be reduced.
  • the method according to the invention makes it possible to achieve substantial advantages in the production of comparatively cost-intensive, forged, high-strength workpieces.
  • An advantageous positioning of the tool relative to the workpiece can be made possible with a tool holder which is designed to be four-axis movable and allow a particularly precise machining of the clamped workpiece.
  • this can also be decisive for incremental cold forging for a comparatively high dimensional and dimensional accuracy.
  • Advantageous process conditions may result if the workpiece is cold forged with an electrodynamic forging tool, since the multiaxially movable tool holder serves merely to set the forging tool in the process. Namely, the forging process can be performed highly dynamically by the electrodynamically controlled movement of the hammer head of the forging tool. An extremely accurate and also reproducible, incremental cold forging of the workpiece can be made possible.
  • the invention has also set itself the task of a machine tool of the type described in a structurally simple way to change that so that a high-strength workpiece can be finished to a finished wedge.
  • the machine tool to a high dimensional and dimensional accuracy even with forged workpieces, for example, a Ti-5AI-5V-5Mo-3Cr alloy (Ti-5553), allow.
  • the machine tool comprises a forging tool for incremental cold forging of the workpiece, the impact head of which is guided along a path of movement free of the axes of movement of the tool holder.
  • the machine tool comprises a forging tool for incremental cold forging of the workpiece
  • unwanted thermodynamic properties on the workpiece due to a previous machining hard machining can be compensated, so that a comparatively high dimensional and dimensional accuracy can be achieved on the finished part.
  • This high dimensional and dimensional accuracy of the finished part can be further improved if the impact head of the forging tool is guided along a movement path free of the axes of movement of the tool holder, because thereby the incremental cold forging can be performed free of guide parameters of the tool holder.
  • the machine tool according to the invention can therefore enable a complete machining of the workpiece to the finished part, without having to leave the clamping for the machining of the workpiece, whereby this is achieved a decisive improvement over the prior art.
  • the design effort in the working space of the machine tool can be reduced if the tool holder has a connection for controlling and / or powering the received electromagnetic forging tool.
  • the machine tool according to the invention can be distinguished in particular by having a forged workpiece made of titanium or a titanium alloy or machining it into a finished part.
  • Fig. 1 is a side view of a machine tool for complete machining
  • Figures 2 and 3 are enlarged views of the tool holder of the machine tool shown in FIG. 1.
  • the machine tool 1 shown in FIG. 1 shows a clamped forged workpiece 2 made of a Ti-5AI-5V-5Mo-3Cr alloy (Ti-5553).
  • Ti-5AI-5V-5Mo-3Cr alloy Ti-5553
  • engage on the workpiece 2 a plurality of clamping means 3 and 4, namely on the one hand, an external clamping chuck 5 and on the other opposite side a tailstock 6, which spans with centering tips 7, the end face of the workpiece 2.
  • the chuck 5 is connected to a spindle drive 8 in order to clamp the workpiece 2 rotatably.
  • a bezel 9 is still provided for centering the workpiece 2, which can also act as clamping in the sense of a clamping device.
  • a tool 10 with a geometrically determined cutting edge 18 (eg milling tool), which is fastened to a multi-axially movable tool holder 12 of the machine tool 1, is used to machine the workpiece 2.
  • a multi-axis mobility of the tool holder 12 is pivotally provided on a side carriage 13 which is mounted linearly displaceable on a linearly displaceable main carriage 14.
  • the workpiece 2 after its hard machining, as shown in Fig. 3, with the aid of a forging tool 1 1 to the finished part 17 is incrementally cold forged and thus subjected to a post-treatment, so as to obtain the desired dimensional and dimensional accuracy. Since the clamping is maintained in the hard machining according to FIG. 2 and in the cold forging according to FIG. 3, a high dimensional and dimensional accuracy is ensured even for a workpiece 2 made of a TiA-5C-5Mo-3Cr alloy (Ti-5553). In addition, this results in an integrated manufacturing process for forged high-strength materials on a machine tool 1, so that for the first time a complete machining with short lead times is possible.
  • the machining process can be further simplified in its handling by the cutting tool 10 of the tool holder 12, as shown in Fig. 2, replaced by the forging tool 1 1, so as to perform the incremental cold forging.
  • the workpiece 2 is completely finished in only one clamping on the machine tool 1 to the finished part 17, which further optimizes the operation sequence.
  • the multiaxial movability of the tool holder 12 is shown. Its axes of movement 19, 20, 21, 22 comprise three linear axes 19, 20, 21 and a rotation axis 22, via which the tools 10, 11 can be moved relative to the clamped workpiece 2.
  • the forging tool 1 1 has a relation to the axes of movement 19, 20, 21, 22 of the tool holder 12 free linear movement path 23 over which the impact head 24 of the forging tool 1 1 is guided, which the Fig. 3 can be better removed.
  • the incremental cold forging of the workpiece 2 can thus be performed independently of the axes of movement 19, 20, 21, 22 of the tool holder 12, which allows advantageous processing conditions.
  • the tool holder also has a connection 25 for the control, regulation and / or power supply of the received electromagnetic forging tool 1 1.
  • connection 25 for the control, regulation and / or power supply of the received electromagnetic forging tool 1 1.
  • a feed device 27 is associated with the tool holder 12 in order to cool and / or lubricate the processing region of the workpiece 2 with cooling lubricant 28 as needed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Forging (AREA)

Abstract

L'invention concerne une machine-outil (1) et un procédé d'usinage d'une pièce à usiner (2) pour obtenir une pièce finie (17), procédé selon lequel la pièce à usiner (2) est serrée dans une machine-outil (1) et usinée par enlèvement de matière par un outil (10) qui présente une lame (18) géométriquement définie et qui est fixé mobile selon plusieurs axes à un porte-outil (12) de la machine-outil (1). L'invention vise à assurer une précision dimensionnelle et géométrique la plus élevée possible de la pièce finie (17). A cet effet, la pièce à usiner (2), après son usinage par enlèvement de matière et alors qu'elle reste serrée, est au moins sur certaines parties forgée à froid graduellement au moyen d'un outil de forgeage (11) pour obtenir la pièce finie (17).
EP13802851.9A 2012-09-28 2013-09-27 Machine-outil et procédé d'usinage d'une pièce à usiner Withdrawn EP2900399A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50417/2012A AT512389B1 (de) 2012-09-28 2012-09-28 Werkzeugmaschine und Verfahren zur Bearbeitung eines insbesondere geschmiedeten Werkstücks
PCT/AT2013/050197 WO2014047670A1 (fr) 2012-09-28 2013-09-27 Machine-outil et procédé d'usinage d'une pièce à usiner

Publications (1)

Publication Number Publication Date
EP2900399A1 true EP2900399A1 (fr) 2015-08-05

Family

ID=48875287

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13802851.9A Withdrawn EP2900399A1 (fr) 2012-09-28 2013-09-27 Machine-outil et procédé d'usinage d'une pièce à usiner

Country Status (4)

Country Link
US (1) US20150290701A1 (fr)
EP (1) EP2900399A1 (fr)
AT (1) AT512389B1 (fr)
WO (1) WO2014047670A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109304618B (zh) * 2018-09-20 2023-09-12 大连中成精密机械有限公司 车底齐口机
CN110153728B (zh) * 2019-05-28 2020-09-01 南昌航空大学 3d打印-焊接-冷热处理复合加工装置及方法
MX2022016543A (es) * 2021-07-22 2023-03-06 Scofast Llc Sistema y metodo para realizar operaciones diferentes en una sola maquina.

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1695787A (en) * 1925-02-28 1928-12-18 Williams Alloy Products Compan Method of making piston rings
SE427992B (sv) * 1980-10-06 1983-05-30 Foerenade Fabriksverken Forfaringsett vid kallsmidesmaskin med roterande slagorgan
US4639568A (en) * 1984-07-13 1987-01-27 Ex-Cell-O Corporation Apparatus and method for finishing fuel injector spray tips using EDM
FR2713117B1 (fr) 1993-12-01 1996-01-05 Snecma Procédé d'usinage de pièces en titane ou alliages de titane et bride d'arrossage pour un tel usinage.
DE10243415A1 (de) * 2002-09-18 2004-04-01 Alstom (Switzerland) Ltd. Verfahren zur Erzeugung von Druckeigenspannungen in der Oberfläche von Werkstücken
DE102007028888B4 (de) * 2007-06-20 2015-07-23 Maschinenfabrik Alfing Kessler Gmbh Verfahren zur Erhöhung der Festigkeit eines Bauteils
DE102009025621B4 (de) * 2009-06-18 2011-06-30 Daimler AG, 70327 Verfahren zum Herstellen eines metallischen Bauteils mit einer gehärteten Oberflächenschicht sowie danach hergestelltes Bauteil
US8479549B1 (en) * 2009-08-17 2013-07-09 Dynamic Flowform Corp. Method of producing cold-worked centrifugal cast tubular products
ES2636015T3 (es) * 2010-03-05 2017-10-05 Fidia S.P.A. Método para mover una herramienta de una máquina de CNC sobre una superficie
DE102010019547B4 (de) * 2010-05-05 2021-01-21 Pokolm Frästechnik GmbH & Co. KG Kaltschmiedevorrichtung und Kaltschmiedeverfahren
CN103121078A (zh) * 2011-11-20 2013-05-29 江苏仁安高新技术有限公司 一种接送料装置

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2014047670A1 *

Also Published As

Publication number Publication date
WO2014047670A1 (fr) 2014-04-03
AT512389A4 (de) 2013-08-15
US20150290701A1 (en) 2015-10-15
AT512389B1 (de) 2013-08-15

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