Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
  • B23Q39/00—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation
  • B23Q39/02—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being capable of being brought to act at a single operating station
  • B23Q39/021—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being capable of being brought to act at a single operating station with a plurality of toolheads per workholder, whereby the toolhead is a main spindle, a multispindle, a revolver or the like
  • B23Q39/022—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being capable of being brought to act at a single operating station with a plurality of toolheads per workholder, whereby the toolhead is a main spindle, a multispindle, a revolver or the like with same working direction of toolheads on same workholder
  • B23Q39/023—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being capable of being brought to act at a single operating station with a plurality of toolheads per workholder, whereby the toolhead is a main spindle, a multispindle, a revolver or the like with same working direction of toolheads on same workholder simultaneous working of toolheads
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B5/00—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor
  • B23B5/18—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor for turning crankshafts, eccentrics, or cams, e.g. crankpin lathes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
  • B23Q39/00—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation
  • B23Q39/02—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being capable of being brought to act at a single operating station
  • B23Q39/028—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being capable of being brought to act at a single operating station with a plurality of workholder per toolhead in operating position
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T409/00—Gear cutting, milling, or planing
  • Y10T409/30—Milling
  • Y10T409/306664—Milling including means to infeed rotary cutter toward work
  • Y10T409/30756—Machining arcuate surface
  • Y10T409/307616—Machining arcuate surface with means to move cutter eccentrically
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T483/00—Tool changing
  • Y10T483/10—Process
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T483/00—Tool changing
  • Y10T483/16—Tool changing with means to transfer work
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T483/00—Tool changing
  • Y10T483/16—Tool changing with means to transfer work
  • Y10T483/165—Plural machine tools, e.g., flexible manufacturing
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T82/00—Turning
  • Y10T82/19—Lathe for crank or crank pin
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T82/00—Turning
  • Y10T82/25—Lathe
  • Y10T82/2524—Multiple

Definitions

• Machine tool for machining crankshafts for four-cylinder in-line engines, its working process and machining chain incorporating such a machine tool
• the present invention relates to the field of crankshaft machining and relates more particularly to a machine tool for turning-leveling crankshafts for four-cylinder in-line engines.
• the machine tools currently ensuring the rotation-shaving of crankshafts intended for four-cylinder in-line engines are of the type comprising those on which a work station is arranged ensuring the rotation of a crankshaft and a work station.
• machining equipped with at least one tool-carrying disc ensuring the rotation-shaving of the crankshaft driven in rotation on the work station.
• the machining station and the drive station are arranged in an inclined plane so as to facilitate the extraction of the chips resulting from the machining operation.
• Such a machine tool has a disadvantage in terms of profitability because a delay is necessary between two machining operations on the same machine to assume all operations of unclamping, unloading, loading, clamping and indexing d 'a crankshaft, called "auxiliary operations" in the context of the present invention.
• auxiliary operations For the rotation-shaving of crankshafts intended for four-cylinder in-line engines, the Applicant has found that the times of the auxiliary operations are as long as the machining times so that the actual machining times are reduced by half , which greatly affects the effective yield of such ⁇ china tools.
• the machine tool according to the invention assigned in particular to the machining by crimpering of crankshafts for four-cylinder in-line engines, is remarkable in that it comprises, arranged on a frame along the transfer tax. a machining chain for said crankshafts and in the same horizontal plane:
• machining station equipped with at least one tool-carrying disc ensuring the turning-leveling operations of the crankshafts
• the machining station is equipped with two movable tool disks along the transfer axis on the one hand, to move from a work station to the other, and along an axis perpendicular to the first on the other hand, to approach and / or move away from one another in order to ensure the machining of two different portions of the crankshaft from one work station to another.
• the purpose of such kinematics is to implement an original working process which consists in machining on a work station of a machine tool the crank pins or the end bearings of a crankshaft and on the other work station the crank pins or the intermediate bearings of another crankshaft.
• the method consists in machining on the first work station the end bearings or crank pins and on the second work station the intermediate crank pins or bearings so that the holding of the crankshafts by the dolls of the second work station can be as close as possible to the crank pins or intermediate bearings to be machined.
• the machining station is equipped with a tool-carrying disk movable along the transfer axis on the one hand, to evolve from a work station to the other, and along an axis perpendicular to the first on the other hand, to move from one end to the other of the crankshaft in order to ensure the machining of the ends of the latter from a work station to the other.
• the purpose of this kinematics is to implement an original working process which consists in machining on one work station of a machine tool one of the ends of a crankshaft, namely the plate and on the other work station. 'other ends, namely the tail of another crankshaft.
• the method consists in machining in priority on the first workstation the plate and on the second work station tail of crankshafts.
• the gantry surmounting the machine tool and which ensures the transfer of the crankshafts from one work station to the other comprises a carriage mounted to slide and advantageously having two grippers for gripping the crankshafts having a pitch equal to the pitch of the two work stations of the machine tool so as to be able to carry out the handling operations of the crankshafts two by two by acting simultaneously on the two work stations or on a station and a work station (conveyor arrival or departure for example) located upstream or downstream of the machine tool.
• the cart of this gantry can also include a tool magazine which, arranged between the two grippers, ensures the removal and / or installation from the top of the tools of the machining station, which has become less accessible laterally due the isolation of the latter by the two workstations.
• the invention also relates to a chain for machining crankshafts for four-cylinder engines comprising at least three machine tools, one for machining crankpins, the other for machining bearings and the last for machining. ends (plate and tail), which are arranged below a gantry ensuring the guiding of crankshaft transfer and tool change carriages.
• Figure 1 is a side view of a machining chain incorporating a machine tool according to the invention, for the turning-leveling of a crankshaft for four-cylinder in-line engines.
• FIG. 2 is a schematic top view of the machine tool illustrated in the drawing of FIG. 1.
• Figure 3 is a schematic view illustrating the operation of a machine tool according to a first mode of operation for ensuring the machining of the bearings of a crankshaft.
• Figure 4 is a schematic view illustrating the operation of a machine tool according to a second mode of operation intended to ensure the machining of the crank pins of a crankshaft.
• FIG. 5 is a side view of a machining chain integrating two machine tools, one using the first operating mode for machining the bearings of a crankshaft and the other the second operating mode for l machining of crankpins.
• Figure 6 is a schematic top view of the machine tool illustrated in Figure 1, according to a third operating mode intended to ensure the machining of the ends of a crankshaft.
• FIG. 7 is a schematic view illustrating the operation of the machine tool of FIG. 6.
• the machine tool of the invention referenced M as a whole and represented in the drawings of FIGS. 1 and 2, is assigned in the present case to the machining by rotation-leveling of crankshafts for engines with four cylinders in line.
• Such a machine consists of a frame conventionally made of mechanically welded and from spars judiciously assembled together in order to serve as a logical structure for the various organs necessary for the operation of the machine and which will be described above.
• This frame can also include in its configuration, a device for evacuating the chips resulting from the machining for recovery purposes either to a channel arranged in the ground or to conveyors installed under the workstations.
• the frame is arranged to receive along the transfer axis (symbolized by the arrow A) and in the same horizontal plane:
• the PI machining station is equipped with two tool-carrying discs 110 and 120 ensuring the twist-and-level machining of the two crankshafts and is mounted mobile (arrow X ) along the transfer axis (arrow A) so as to be able to move back and forth from the first work station SI to the second work station S2, with the aim of ensuring the machining of a crankshaft during the auxiliary operations necessary for the installation of a new crankshaft on the other work station, and vice versa.
• the two tool-carrying discs 110 and 120 of the aforesaid machining station pi mounted mobile along the transfer axis to move from one work station, S 1 or S2, to the other, S2 or SI, are also driven in a translational movement (arrow Y) along an axis perpendicular to the transfer axis (arrow A) to approach and / or move away from each other at for the machining of two different portions of the crankshaft from one SI or S2 workstation to another.
• this dual mobility X and Y of the tool-carrying discs 110 and 120 between the two work stations S 1 and S2 makes it possible to assume the implementation of an original working process, which is illustrated in more detail on the drawings of FIGS.
• FIG. 3 The purpose of the drawing of FIG. 3 is to illustrate by a block diagram, the kinematics of the machining station PI and of the two work stations S 1 and S2 of a machine M ensuring the machining by turning-shaving of the bearings 210a, 210b, 210c 210d of a crankshaft 200.
• the two tool-carrying discs 110 and 120 shown in solid lines machine by turning -arasing the extreme bearings 210a and 210b of the crankshaft 200 held at its ends in the dolls of the work station S 1 not shown but whose clamping points are symbolized by the arrows B.
• FIG. 4 aims to illustrate by a block diagram, the kinematics of the machining station P '1 and the two workstations S' 1 and S * 2 of a machine M 'ensuring the machining by rotation-shaving of the crank pins 220a, 220b, 220c, 220d of the crankshaft 200.
• the two tool-carrying discs 110 ′ and 120 ′ shown in solid lines machine by turning-shaving the extreme crank pins 220a and 220 b of the crankshaft 200 held at its ends in the dolls of the work station S'1, not shown but whose clamping points are symbolized by the arrows B '.
• the machining station P '1 moves (arrows X) towards the opposite work station S' 2 while bringing (arrow Y) one of the other, the two discs carry -tools 110 'and 120', as shown in phantom in the drawing.
• the crankshaft 200 installed in the work station S '2 is then machined by turning-leveling at its central crank pins 220c and 220d with the crankshaft being held in the dolls of the work station S' 2 as close as possible to the zones '' machining by authorizing clamping (arrows B ') on bearings 210a and 210d previously machined on machine M.
• crankshaft 200 represented on the drawings of the Figures 3 and 4 was considered the same at a given time to better highlight the machining cycles.
• the crankshaft handling cycles will be adapted in such a way that each crankshaft 200 is machined in all the stations SI, S2, S'1 and S'2. This working process is of greater interest when a machining chain C as illustrated in the drawing of FIG.
• the machine M is surmounted by a gantry 300 which ensures, via a mobile carriage 310, the transfer of the crankshafts 200 from a work station SI or S2 to the other S2 or SI workstation.
• the carriage 310 of this gantry 300 is fitted with two grippers 311 and 312 for gripping the crankshafts 200, having a pitch "p" equal to the pitch "p" of the two work stations S 1 and S2 of the machine - tool M, so as to be able to implement a duplex handling cycle between the two work stations SI and S2 on the one hand, and with a work station SI and S2 and an external work station P2, P3, P4 , P5, P6 (conveyor or buffer stock) located upstream or downstream on the other hand
• P2, P3, P4 , P5, P6 conveyor or buffer stock
• the carriage 310 of this gantry 300 also includes a tool holder magazine 313 which, arranged between the two gripping pliers 311 and 312, has the purpose of ensuring the removal and / or installation from the top of the tools on the workstation. PI machining.
• a tool holder magazine 313 which, arranged between the two gripping pliers 311 and 312, has the purpose of ensuring the removal and / or installation from the top of the tools on the workstation. PI machining.
• the gantry 300 comprises two carriages 310 and 310', each offering the same equipment of two grippers. gripping 311, 311 ', 312, 312' and a tool magazine 313, 313 ', to each ensure the handling cycle of the crankshafts 200 between the two machine tools M and M'.
• the pitch "p" between the members of the two machine tools will be identical.
• the machining station P "l is equipped with a single tool-carrying disc 130 ensuring the machining by tapping-leveling of the ends of the two crankshafts 200 and more particularly of their plate 230 and their shank 240.
• This tool-carrying disc 130 also mounted movable (arrow X) along the transfer axis (arrow A), is driven by an alternative movement of translation (arrow Y ') along an axis perpendicular to the transfer axis (arrow A) to move from one end to the other of the crankshaft for the purpose of machining the plate 230 and the shank 240.
• FIG. 7 The drawing of Figure 7 is intended to illustrate by a block diagram, the kinematics of the machining station P “l and the two workstations S" l and S “2 of a machine M” ensuring the machining by rotation-leveling of the plate 230 and the shank 240 of a crankshaft 200.
• the machining station F'1 moves (arrows X) towards the opposite work station S" 2 while directing (arrows Y ') the tool disc 130 towards the other end of the crankshaft 200, where it is shown in phantom.
• the crankshaft 200 installed in the work station S "2 is then machined by turning-leveling at its extreme bearing and the shank 240.
• crankshaft 200 is also in the present case considered to be the same at a given instant in order to better highlight the machining cycles, and the crankshaft handling cycles are adapted so that each crankshaft 200 is machined as a whole.
• stations SI, S2, S'1, S'2, S “l, S” 2 of a machining chain C which will integrate in series in the direction of transfer (arrow A), the three machine tools M, M 'and M "able to machine the first the four bearings 210a, 210b, 210c, 210d of the crankshaft 200, the second the four crankpins 220a, 220b, 220c, 220d and the third the ends, namely the face and the diameter of the tray 230 and tail 240.
• the gantry 300 will then comprise three carriages one for the machine M, the other for the machine M 'and the third for the machine M ", for each ensuring the cycle, for handling the crankshafts 200 between the three machine tools M, M'and M".
• the pitch "p" between the members of the three machine tools M, M 'and M " will therefore be identical.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Turning (AREA)
• Milling Processes (AREA)
• Grinding Of Cylindrical And Plane Surfaces (AREA)
• Multi-Process Working Machines And Systems (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

Family

ID=9469638

Family Applications (1)

Country Status (9)

Cited By (3)

Families Citing this family (20)

Citations (8)

Family Cites Families (13)

• 1994
  • 1994-12-09 FR FR9414826A patent/FR2727885A1/fr active Granted
• 1995
  • 1995-12-08 JP JP51738096A patent/JP3715648B2/ja not_active Expired - Fee Related
  • 1995-12-08 US US08/849,213 patent/US5997452A/en not_active Expired - Fee Related
  • 1995-12-08 AU AU43496/96A patent/AU4349696A/en not_active Abandoned
  • 1995-12-08 PT PT95942234T patent/PT799104E/pt unknown
  • 1995-12-08 DE DE69518856T patent/DE69518856T2/de not_active Expired - Lifetime
  • 1995-12-08 WO PCT/FR1995/001633 patent/WO1996017705A1/fr not_active Ceased
  • 1995-12-08 ES ES95942234T patent/ES2152436T3/es not_active Expired - Lifetime
  • 1995-12-08 EP EP95942234A patent/EP0799104B1/fr not_active Expired - Lifetime
• 1998
  • 1998-11-12 US US09/189,944 patent/US6102838A/en not_active Expired - Fee Related

Patent Citations (8)

Also Published As

Similar Documents

Legal Events