DE2457477A1 - AUTOMATIC MULTI-SPINDLE LATHE - Google Patents

Description

Wickman Machine Tool Sales Limited, Banner! Lane, Tile Hill,.

Coventry

Automatic multi-spindle lathe.

The invention relates to automatic multi-spindle lathes, whereby the spindles are rotated with the aid of a gear in a switchable spindle drum and the gear is rotated with it Using coupling means with the spindles engaged respectively is disengaged ».

The invention is based on the object of specifying suitable means to control the activation of the clutches for the spindles without disturbing the switching movement of the spindle drum

According to the invention, the spindle drive for a multi-spindle lathe electrically operated coupling means, with the help of which the drive of the spindles can take place, each Coupling means comprises a part which is attached to the spindle to be rotated, a part which is attached to the driving means is fixed, as well as electromagnetic means which are arranged in a ring attached to the drum, in which the spindles are rotatably arranged, the electromagnetic means being able to work with clutch disks, which are arranged on the respective parts to be engaged or disengaged.

The invention is illustrated in the drawings Exemplary embodiment explained in more detail

Fig. 1 is a side view with a partial cross-section of a multi-spindle lathe in which the invention is used;

Fig. 2 is a partial end view showing the rotating electrical distributor illustrated;

.. P ~ 509824/0293

3 is a simplified end view of the switchable spindle drum of the lathe;

Fig. 4 is a partial view showing another embodiment of the rotating electrical distributor lers represents;

5 shows a side view with a partial sectional illustration the drive device of one of the work spindles of the lathe in an enlarged Scale j

FIG. 6 shows a representation corresponding to FIG. 5, which however, more detail is illustrated and shown on a much larger scale is.

As shown in FIGS. 1 and 3, the lathe a base plate 10, on which the superstructures 11 and 12 are arranged, leaving a gap, which with By means of a bridge 13 are connected to each other. In the structure 11 a switchable spindle drum 14 is arranged, on which a drum attachment 14a is attached. The drum 14 and you Approach 14a are provided with means to carry out their switchability about their central axis. However, these funds are in individual not shown. They mesh with a gear ring 15 which is arranged on the outside of the drum 14.

Several work spindles (six in the present case), which are designated by 16, are mounted in the drum 14. The work spindles 16 have rkstücke corresponding clamping devices for the W _e, whereby the clamping devices are designated by the 17th These clamping devices are operated with the aid of devices not shown.

In order to carry out the rotary movement of the work spindle 16 in the switchable drum 14 is provided with a transmission

S09d24 / 0293

however, in the drawing for the sake of clarity a part is omitted · This gearbox is produced for each work spindle 16 has two different speeds of rotation. In addition, braking means are provided around the work spindle stationary and, if this is desired, to be held in a certain angular position

The transmission has a gear 18 which-in the drum attachment 14a is arranged centrally on a hollow shaft 19 which extends straight through the switchable drum 14 and through the space between the two structures 11 and 12 passes through this hollow shaft 19 is on part of its length by a stationary sheathing tube 21 enclosed. This wrapping tube 21 also includes the part which extends through the gap between the superstructures 11 and 12

Within the structure 12, the hollow shaft 19 has a gear 22 which meshes with another gear 23, which over a gear box is driven by the lathe drive motor.

Die.Zahnräder 24 and 25, which are located on the work spindles 16, have two speeds. The gear 18 meshes with gear 24 on each of the work spindle, in order to generate a rotational speed, and a further gear train which is driven through the hollow shaft 19 and cooperates with the gear 25, which generates another speed. However, the said gear chain is not shown in the drawing.

To connect the gears 24, 25 to their associated work spindle 16, corresponding 'couplings are provided with its further details in FIGS. 5 and 6 illustrated are. In addition, there are brakes between these clutches in order to stop the rotation of the corresponding work spindles 16.

509824/0293

The clutches and brakes are electrically powered, what will be described. For the electrical connection between all clutches and brakes and as a starting point for the electrical connection, a winding 26 is provided, which is rotated with the drum 14 and its extension 14a. Also is a rotating electrical distributor 27 is provided which is connected to a fixed winding 28. This tight winding 28 leads to the beginning of the electrical connection, which, however, is not illustrated.

The winding 26 between the respective clutches and brakes and the rotating electrical distributor 27 is shown in FIG housed a tube 29 which is attached to one end of the drum attachment 14a and therefore together with this at the rotary motion revolves.

The tube 29 extends straight through the superstructures 11 and 12 and the rotating electrical distributor 27 is at one end of the structure 12 mounted on the end of the machine.

The rotating electrical distributor 27, which is also shown in Fig. 2, has a sleeve 30 which is connected to the end of the Tube 29 is connected, which corresponding spring-actuated, radially extending, electrical connecting elements 3 * 1 to the inner end to which the winding 26 is connected.

The sleeve 30 is surrounded by a ring 32 which is attached to the structure of the lathe. This contains a number of electrical connection elements 33 'which interact with corresponding connection elements 31 in the socket 30. On the connecting elements 33, the fixed coil 28 is mounted "The connecting elements 31 and 33 are equal in number and have the same distance, but the switching of '· of the drum 14 together with the pipe 29 leads to the change of the electrical connection.

- 5.-509824/0293

The beginning of the electrical connection connected to the fixed winding 28 provides a control for the optional Acting of the clutch and brake means, in the way that this is required in accordance with the machining cycle of the lathe.

Figure 3 illustrates two alternative means of connecting the winding 26 to the corresponding clutch and braking means. An arrangement according to FIG. 3 shows terminal blocks 34-, the are mounted on the coupling housing (these will be described later) of the associated work spindles. An alternative Arrangement, which is also shown in Fig. 3, shows terminal blocks 35 'which are on the outside of two of the coupling housings are mounted. They could also be arranged on the other coupling bodies. These terminal blocks are Connected to one another via a further connection block 36 which is mounted on the outside of the spindle drum attachment 14a is where the winding 26 is led.

FIG. 4 illustrates an alternate embodiment of rotating electrical distributors to replace the part designated 27 in FIGS. 1 and 2. This includes a front plate 37 which is mounted on the end of the tube that has the winding 26. In the front panel contact pieces 38 are arranged which cooperate with corresponding spring-actuated contact members 39 on the plate 4-1, which is fastened (in a manner not shown) on the structure 12 of the D _r ehbank. Also, only five contact pieces are illustrated, although in practice there could be as many as eight pieces.

The fixed winding 28 is connected to the plate 41 with the spring-actuated contact pieces 39 · When the tube 29 in Coincidence with the spindle drum 14 is switched to be the electrical connections changed in a way that

509824 / 0293-

the rotating electrical distributors shown in Figs resembles.

FIGS. 5 and 6 illustrate the clutch and brake elements. tel on one of the work spindles 16. There are two rings 42, 43 which are attached to the drum attachment 14a. On the outer Surface of each ring are grooves 4-4, 45 arranged in which corresponding locking elements 46, 47 engage, which are also shown in Figures 1 and 3 are illustrated. These locking members are connected via bolts 48 to correspondingly remote areas of the drum attachment 14a. The locking members 47 are as in Fig. 3, arranged in pairs, and have a connection to the rings 42, 43 via bolts (not shown).

In the ring 42 are two electromagnetic windings 49, 51 arranged. These are in opposing, annular Grooves arranged so that the ends of the electromagnet point in opposite axial directions. A further electromagnetic winding 52 is also located in the ring 43.

The purpose of the electromagnetic winding 49 is to operate a clutch device and the work spindle 16 to be connected to the gear ring 24, so that a predetermined rotational speed of the work spindle 16 arises. The gear 24 is mounted on the work spindle with the help of axle and thrust bearings 53. The cog wheel 24 has a cylindrical Approach 54, which is provided with slots on the outside to a number of clutch disks 55 to accommodate. The clutch plates can work together with other clutch plates 56, which are arranged in slots of a part 64 to be described below. In the coupling sleeve 57 is on one End of a Einteilring 58 arranged, which for the plates 55, forms a stop. The adjusting ring 58 interacts with the coupling sleeve 57 via a thread 59. The clutch

509324/0293

bushing 57 has an inwardly extending, wide annular flange 61, which is the surface of the fixed Ring 42 is adjacent, in which the electromagnetic winding 49 is housed · In the coupling sleeve 57 is located the flange 61 is adjacent to a ring with radial bores 62, which are arranged at a certain distance from each other are·

In one of the bores 62 there is a spring-actuated piston 63, which has a radial bore in the part 64 This part 64 has a sleeve with an outwardly extending one Flange on one end. The spring-actuated piston 63 is arranged in this flange. The can-shaped area of member 64 is also slotted to receive a generally rectangular wedge 65 which is inserted into the on the outer surface of the work spindle 16 provided recess engages. Spacers 66, 67, which are on the work spindle 16 are located, secure the part 64 against axial movement relative to the work spindle 16. The spacer 66 rests on adjacent bearing 53 on which the gear 24 is mounted.

The flange of the part 64 has an axially extending surface against which one of the adjacent disks 56 is supported. Enveloped compression springs 68 are provided which act between the surfaces of the adjustment ring 58 and the flange of the part 64 which are opposite one another. The spring 68 has the eck £ _w is a maximum separation between the adjustment ring 58 and the flange of member 64 to maintain, so that a normal rotational movement between the clutch discs 57 and the Zahnrad.24 can take place. If the clutch disc 57 is not rotatably connected to the part 64, which is done with the aid of the spring-actuated piston 63, a relative rotary movement between the work spindle 16 and the gear 24 is possible. The part 64 has an annular projection which receives clutch disks 56, which takes place with the aid of slots arranged therein.

- 8 & 09824/0293

However, if desired, the work spindle with the help of the gear 24 ·, the electromagnetic winding 4-9 in the ring 4-2 is energized. That pulls the thick flange of the clutch sleeve 57, the clutch disks 55, between the inner sides of the adjacent ring 58 and the Splash of part 64- are pressed together. After completion the excitation of the electromagnetic coil 4-9, the clutch disks are under the influence of the springs 68 from each other again separated.

In order to obtain a suitable setting between the clutch disks 55 »56 ZTi, it is sometimes necessary to adjust the position of the adjusting ring 58 to be adjusted in relation to the clutch disks 57 «, This is achieved by depressing the piston 63 and the clutch plate 57 rotates relative to the clutch plates and the adjusting ring 58 until a correct clearance is set is. In practice, a small distance between the flange 61, the clutch disc 57 and the adjacent Area of the fixed ring 4-2 maintained even when the electromagnetic coil 4-9 is not is more under the influence of arousal.

The electromagnetic winding 51 is part of a braking means, and this is similar in its form to that already described Coupling device.

A part 69 has at its end remote from part 64- an outer annular space slotted in the longitudinal direction. A sentence reaches into the slots. Clutch disks 71 alternatively with further disks 72, which are arranged in the part 79, which is provided with slots to accommodate the discs. The part 79 is surrounded by a sleeve 73, one end of which cooperates with an adjusting ring 74-. The interaction takes place as with the setting ring 58 in the clutch disc 57 'via a threaded connection 75

- 9 -509824/0293

The clutch disc 73 has a thick flange 76 as well this adjacent a ring with radial bores 77 · ^ n one the bores 77 is a spring-actuated piston 78, which is received in a radial shoulder in part 79. The part 79 is attached to the fixed ring 42 by means of bolts 81. In corresponding axial bores in the fixed ring

42 springs 82 are arranged, the outer ends being supported on the clutch disk 73. The springs 82 surround the electromagnetic winding 51 and act in one direction, which is opposite to the direction when the electromagnetic coil 51 is energized.

If the braking means bettäigt when the work spindle relative to the set A _n in any angular position of the spindle 16 14a are locked soli is excited, the electromagnetic coil 51st The thick flange 76 of the clutch disc 73 is tightened in order to compress the clutch discs 71, 72 between the adjusting ring 74 and a surface of the part 79 ′ which is attached to the fixed ring 42. When the clutch disks 7 ^ cooperate with the part 69 which is connected to the work spindle 16 during the rotary movement, this has the effect that the work spindle is locked relative to the fixed ring 42. Upon completion of the energization of the electromagnetic coil 5I, the springs 82 move the clutch plate 73 away from the adjacent side of the fixed ring 42.

The electromagnetic winding 52 in the other fixed ring

43 is used to select a different speed for the work spindle 16, and the clutch is similar to the device that is used for the connection of the gear wheel 24 with the work spindle sixteenth

In the fixed ring 43, a roller bearing 84 is arranged in which the work spindle 16 is mounted .. This forms a Stop for the further spacer 67

- 10 509324/0293

On the end of the work spindle 16 on the drive side, there is arranged a further axle bearing arrangement 85 which can be subjected to pressure and which corresponds to that with the reference number 53. The gear 25 is mounted on this bearing arrangement. The gear wheel 25 has to receive a cylindrical extension 86 which is slotted externally to a first S _a tz clutch discs 87th To this set there is an associated set of further clutch disks 88 which cooperate with a part 95 which is provided with a number of slots in order to attach them. A surrounding it clutch plate 89 is provided 91 and from each other proprieties having radial bores 92 with a thick Plansch, wherein one is located in one of them the piston 93 spring acting · The clutch plate 89 has, at its end which is located away from the flange 9Λ off, a Adjusting ring 94 on. The part 95 'which is connected by means of the K _e iles 96 with the work spindle 16, has a flange, in which is located the piston 93rd The electromagnetic coil 52 is adjacent to the flange 91 of the clutch disc 89, and the excitation of this coil causes the clutch discs 87 to be compressed against the action of the compression spring 97, the gear wheel 25 cooperating with the work spindle 16.

The electrical control is designed so that it works for both it is never possible for the corresponding clutches to work together with the gears 24 and 25 at the same time.

Other arrangements of clutches and brakes can easily For example, a clutch and a brake can be used in a single speed machine come into use.

Expectations

- 11 -

509824/0293

Claims (7)

ntest 1) Gear for the spindles of a multi-spindle lathe, with electrically operated coupling means being provided to to transmit the drive to the spindles, whereby gedes Coupling means has a part which is fixedly arranged with respect to the spindle to be driven, and another Part which is fixedly arranged with respect to the driving part and in which electromagnetic means are also provided which are mounted in a ring attached to a ' Drum is attached, in which the spindles are rotatably arranged, wherein the electromagnetic means formed are that they come with clutch plates that are on the said corresponding parts are arranged, engaged or disengaged. 2) Transmission according to claim 1, wherein the coupling means are correspondingly connected to the beginning of an electrical connection, with the aid of a winding which extends through a tube which is switchable with a drum in which the spindles are rotatably arranged, wherein the tube is coaxial with the drum and the tube carries a rotary electrical distributor which a T _e il which is fixed to the housing of the lathe, and wherein the manifold electrical connections between the winding and the start of the electric connection is prepared. . ' 3) Transmission according to one of claims 1 and 2, wherein the electromagnetic Means consist of windings which are mounted in the rings which are attached to the spindle drum are, the windings having axially extending, annular grooves in the rings, which to the associated parts are arranged next to the beard. ■ - 12 - 509824 / 029-3 4) Transmission according to one of the preceding claims, wherein the rotating manifold is located near the opposite end of the lathe from the spindle drum and wherein the distributor has fixed connections which are established by a control device at the beginning of the electrical connection to lead. 5) Transmission according to any one of the preceding claims, wherein the winding is connected to the coupling means, and via connecting blocks that are mounted on the spindle drum are· 6) Transmission according to any one of the preceding claims, wherein a number of coupling means and a braking means are provided for each spindle of the lathe. 7) Transmission according to any one of claims 1 to 5 »where for each spindle of the lathe is provided with a coupling means and a braking means. 509824/0293 Blank page