FR2512709A1 - TOWER HAS MULTIPLE TOOL CARRIERS - Google Patents

Abstract

THE INVENTION CONCERNS A LATHE INCLUDING A BENCH 2, A SPINDLE-HOLDER DOLL 3 PLACED IN A FIXED POSITION AND A MOBILE COUNTER-DOLL 20 AS WELL AS MACHINING UNITS THAT CAN BE CONTROLLED BY PROGRAM INDEPENDENTLY OF ONE OF THE OTHERS AND WHICH ARE MOBILE AS WELL AS PARALLEL AS PERPENDICULAR TO A HORIZONTAL SPINDLE AXIS A. THE LATHE IS CHARACTERIZED IN THAT AT LEAST THREE MACHINING UNITS 11, 14, 17 ARE PROVIDED ON BOTH SIDES AT THE AXIS OF SPINDLE A AND LEFT AND RIGHT ON BENCH 2 OF THE MACHINE AND IN THAT THE MACHINE UNIT CONSTRUCTION LAYOUT IS ESSENTIALLY IDENTICAL. APPLICATION TO THE FIELD OF MACHINING.

Description

The present invention relates to a lathe comprising a spindle headstock

  fixed and a movable tailstock, as well as

  machining units that can be ordered by independent program

  dangling from each other and which are movable both parallel and perpendicular to a horizontal spindle axis. Such towers are known and have been described in detail in part in patent AT-341 856 and the patent

GB 1 465 139.

  Since, in this case, machining units which are independent of one another and which are arranged opposite each other are provided in each case, simultaneous machining can be carried out.

  in one room using the two units or it can be

  by one of the movement machining units during the work period of the other unit, provided that a three- or four-axis control is used. This also applies to known embodiments in which it is intended on the same side two

machining units of this kind.

  The basic structure of the known towers does not allow

  while not adding additional machining units that can

  be freely ordered because we can no longer be sure of

  free of collisions between these units and the doll

  pin or the tailstock The profitability of using these

  towers is therefore limited because, for example,

  brick no room requiring the use of a freely programmable bezel control Also the arrangement and the

  quite different from the machining units of the machines

  Known countries do not allow, because of the large number of

  These, to reduce manufacturing costs According to this state of the art, the invention aims to overcome the drawbacks mentioned above and provide a tower that can be used universally with the maximum profitability and allows to 'get a high degree of machining precision and a

  optimal price / power ratio This problem is solved according to the

  in that at least three machining units are provided which

  are arranged on each side of the spindle axis and whose struc-

  are essentially the same.

  Thanks to this new arrangement of the machining units, the following results are obtained among others:

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  possibility of programmed control according to more than 4 axes, improvement of the working cycle by simultaneous machining, for the same basic structure of the lathe, easier adaptation of the machining units to the considered application,

  safety of movement relative to the doll

brooch and the counter-doll.

  In addition, the essentially identical structure of the machining units still offers the following advantages: reduction of manufacturing costs by reducing the categories of parts, simplification with regard to the maintenance of the stock and the supply of spare parts,

  possibility of adapting tool holders and

  auxiliaries depending on the machining operations.

  An important advantage of the arrangement of the lathe according to

  the invention also consists in that, in order to manufacture

  tion of highly elongated turned parts or for a machined

  trees on alternate sides, each of the machining units

  freely programmable can be provided with a telescope device.

  Other advantageous features of the invention

  will be highlighted in the secondary claims.

  We will describe in the following an embodiment of the

  according to the invention comprising three machining units, with reference to

  in the annexed drawing in which:

  FIG. 1 is a diagrammatic representation in FIG.

  pective of a lathe according to the invention,

  Figure 2 is a simplified view showing the structure of

  FIG. 3 is a sectional view III - III of FIG. 2, and FIG. 4 is a view of the base plate of a machining unit. The tower shown in FIG. 1 comprises a reinforced concrete foundation i on which the bench 2 is bolted in three points.

  of the turn, made in the form of a casting. The doll

  pin 3 is rigidly connected to the bench 2 of the machine.

  A main drive motor drives, through the

  intermediate of a precision belt (not shown) the pulley

  4 of the working spindle 5 whose axis A is oriented horizontally.

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  On the front surface 6, (Figures 1, 2, 3) of the bank 2, arranged vertically and arranged symmetrically, there are provided four guiding rails 7, 8, 9, 10 hardened and ground which extend over the length of the bench of the machine The two pairs of guide rails 7, 8 and 9, 10 are placed at equal distances respectively above and below the spindle axis A. The upper right machining unit 11, which consists of essentially of a known type of carriage and its drive mechanism, is supported by the guide rails 7, 8 and can be moved in a programmed manner in the direction

  the Z-axis using the drive motor 12 and through the

  of the toothed belt 12a and the lead screw 13.

  The left upper machining unit 14, identical and arranged symmetrically with respect to the upper right machining unit 11, is also supported by guide rails 7, 8 The programmed movement of this unit in the direction of the Z axis is provided against by means of the drive motor 15, through the toothed belt 15a and the lead screw 16 The same consideration also applies to the inner machining unit right 17, which is identical and arranged completely symmetrically with respect to the upper right machining unit 11, but which is however supported by the guide rails 9, 10 and which can be driven also in the direction of the Z axis by intermediate of the drive motor 18, the

  toothed belt 18a and lead screw 19.

  The tailstock 20 of compact structure is supported by the two central guiding slides 8, 9 and it can be moved, as well as all other machining units,

  in the direction of the Z axis, without coming into contact with the

  This movement is produced by the drive motor.

  21, the toothed belt 21a and the lead screw 22.

  Each of the aforementioned machining units 11, 14, 17 has a structure identical to the others, in which only the different

  elements occupy different positions.

  We will first consider the unit 11 represented on the

Figures 2 and 3.

  A symmetrical base plate 23, which is connected rigidly

  to the lower carriage 24, contains a needle-driven upper carriage 25 which can be driven by command

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  programmed in the direction of the Z axis by a motor 26 disposed vertically

  wedge and via a toothed belt 26 a and

of a lead screw 27.

  In this machining unit, the upper carriage 25 is connected to a turret-revolver 28, which receives the necessary tools.

  The horizontal axis of control is ori-

  exactly parallel to the spindle axis A Because the control and actuation of such a turret-revolver are

  known, we will not make a detailed description.

  The machining unit 14 of FIG.

  to the structure of the machining unit 11, only with the difference

  It is symmetrically arranged so that the motor of

  stretching 26 is placed on the left side and the upper carriage

  on the right side of the symmetrical base plate 23.

  In addition, it can be seen that a turret device 29 with a self-centering effect can be placed instead of a turret-revolver 28 without having to modify the structure of the machining unit. The symmetry, visible in FIG. 4, of all the receiving holes of the base plate 23 and the corresponding arrangement

  elements to be mounted in these holes allows the manufacturer of

  changing the machining units, which has a significant influence on the cost savings, which the user can take advantage of both for driving the machine and for

his interview.

  The invention is not limited to the advantageous embodiments described above; in particular, it is possible to place another machining unit on the left and below the axis

  when it is necessary to increase the possibilities of

manufacturing capacity.

  Also the machine can be arranged so that the fixed headstock is arranged on the right side of the post

working.

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Claims (7)

  1 tower comprising a bench, a spindle headstock placed in a fixed position and a movable tailstock, as well as   machining units which can be controlled by independent program   each other and which are movable both parallel and perpendicular to a horizontal axis of the spindle, characterized in that at least three machining units (11, 14 17) which are arranged two sides of the spindle axis (A) and left and right on the bench (2) of the machine and in that the   arrangements for the construction of machining units are essential identical.   Lathe according to Claim 1, characterized in that the machining units located at the top and bottom or to the right and   on the left are arranged in symmetrical pairs (11, 17 or 11, 14) relative to each other.   Lathe according to Claim 1, characterized in that each machining unit (1, 14, 17) comprises a lower carriage (24) and an upper carriage (25), in that the lower carriage (24) is associated with a base plate (23) having elements   symmetrically arranged and that the upper carriage   (25) is mounted on the base plate (23) using the   fasteners corresponding to the position of the machining unit associated swimming.   Lathe according to claim 1, characterized in that a drum-shaped multiple tool carrier (28) can be mounted on the right or left side of each machining unit (11, 14, 17). , the horizontal axis of this tool holder being oriented   parallel to the spindle axis (A).   Lathe according to claim 1, characterized in that each machining unit (11, 14, 17) can be provided on the side   right or left side of auxiliary devices, for example   with a spectacle device (29).   The lathe according to claim 1, characterized in that the drive means for the programmed control of the machining units to move them in one direction.   parallel to the spindle axis (A) are essentially identical.   Lathe according to claim 6, characterized in that   the driving devices (12, 13, 15, 16, 18, 19) are   placed at both ends of the symmetrical bench (2) of the machine. -6 251270 9   8 tower according to claim 1, characterized in that there are provided four machining units arranged on the bench of the machine. The lathe according to claim 1, comprising two upper guides and two lower guides (7, 8, 9, 10), oriented parallel to the spindle axis (A), for the machining units (11, 14, 17), characterized in that the two central guides (8, 9) carry   additionally the counter-doll (20) which can move freely   between the upper and lower machining units. -