Machine-tool comprising two opposed coaxial spindles

• US 4,457,193 A
• Filed: 07/15/1981
• Issued: 07/03/1984
• Est. Priority Date: 07/16/1980
• Status: Expired due to Term

• Current Assignee: Gildemeister Italiana S.p.A. (Dmg Mori Co., Ltd.)
• Original Assignee: Tarex Machines, S.A.
• Inventors: Matthey, Maurice
• Primary Examiner(s): Vlachos, Leonidas
• Assistant Examiner(s): Kearns, Jerry
• Application Number:
  US06/283,545
• Time in Patent Office: 1,084 Days
• Field of Search: 82/3, 82/2.5, 82/2 R, 82/36 A, 29/36, 29/564, 29/568, 29/37
• US Class Current: 82/129
• CPC Class Codes: B23B 29/20 for placing same by shanks in sleeves of a turret
• CPC Class Codes: B23B 3/06 Turning-machines or devices characterised only by the special arrangement of constructional units B23Q37/00 takes precedence; such features of general applicability B23Q
• CPC Class Codes: B23Q 39/048 the work holder of a work station transfers directly its workpiece to the work holder of a following work station
• CPC Class Codes: G05B 19/182 characterised by the machine tool function, e.g. thread cutting, cam making, tool direction control G05B19/21 - G05B19/40 take precedence
• CPC Class Codes: G05B 2219/49376 Select two machining types, milling or turning, complete machining with one tool
• CPC Class Codes: G05B 2219/50003 Machine simultaneously two workpieces
• CPC Class Codes: G05B 2219/50234 Synchronize two spindles, axis, electronic transmission, line shafting
• CPC Class Codes: G05B 2219/50235 Select tools, slides, spindles to work synchronized, independent
• CPC Class Codes: G05B 2219/50307 Correction by probing dimension of machined workpiece
• CPC Class Codes: G05B 2219/50387 Two chucks, grippers, feeder bar, transfer workpiece from one to other
• CPC Class Codes: Y10T 29/5136 Separate tool stations for selective or successive operation on work
• CPC Class Codes: Y10T 29/5153 Multiple turret
• CPC Class Codes: Y10T 82/2514 with work feeder or remover
• CPC Class Codes: Y10T 82/2524 Multiple
• CPC Class Codes: Y10T 82/2587 Turret type holder [e.g., multiple tools, etc.]

Abstract

Two spindles are provided that are coaxial. The head-stock carrying one spindle can move on longitudinal slideways which are parallel to the axis of the spindles. That provides, with a synchronization of the speeds of the spindles to effect the transfer of the workpieces from the chuck of one spindle onto the chuck of the other spindle. A carriage provided with a transversal slideway can move along a pair of longitudinal slideways, parallel to the axis of the two spindles. This carriage carries a frame provided with a revolver-turret-carrying working-tools. The tools of the two revolver-turrets thus can work indifferently the workpieces carried by one and the other of the two spindles.

Claims

1. A machine tool including a pair of spindles mounted in headstocks on a common base and means for rotating each about a common axis, a slideway, at least one of said headstocks being movable along said slideway on said base and means to move said headstock between positions toward and away from said other spindle and supporting at least one workpiece selectively in one, either, or both of said spindles;

a pair of rotatable tool carrying indexable tool turrets, one rotatably mounted about an axis on each side of said common axis for said spindles and parallel thereto, each turret including a carriage, a slideway and means for moving said carriage along a path parallel to said common axis, and wherein one of said turret slideways is in common with said headstock slideway, each turret further including a turret frame mounted on said carriage and means for moving said turret frame transverse to said slideway and said carriage to selectively position one or more tools carried by said turrets into selective engagement with a workpiece carried by either or both of said spindles to perform predetermined machining operations thereon, at least one of said turrets including first and second faces with means defining tool supporting openings extending therebetween and configured to receive and support on either or both faces a tool element for selective engagement with said workpiece.

2. The machine-tool of claim 1 further including means for synchronizing the two spindles, at least temporarily, while they are coaxial so that they rotate at the same speed but in opposite directions, seen from their front face, during a transfer of a workpiece from one spindle to the other.