JPH0335903A - Numerically controlled compound lathe and work method of same - Google Patents

Abstract

PURPOSE:To decrease the working time of a material to be worked through a single or compound work by providing a numerically controlled device for movably controlling the driving of the servo motor of first and second saddles and connecting means for connecting first and second spindle heads to the corresponding first and second saddles. CONSTITUTION:A servo motor for driving first and second saddles 7, 8 to orthogonal biaxial directions, a numerically controlled device for movably controlling the driving of the servo motor of the first and second saddles 7, 8 and connecting means 13, 14 for connecting first and second heads 2, 3 to the corresponding first and second saddles 7, 8 are provided. The first and second spindle heads 2, 3 are relatively moved on the same axis of the spindle and the first and second saddles 7, 8 or the first or second saddle 7 or 8 are relatively or synchronously moved to the spindle heads 2, 3 so that the workpiece to be worked is shortened or the working time can be decreased by a compound work to improve the productivity.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application 1 This invention relates to a numerically controlled compound lathe and its 0 increase lJ'' method.
This type of numerical control lathe is equipped with a main spindle head and has two saddles corresponding to the 1.2F axle head, in which the main spindle head and the saddles can be joined and separated as needed for machining. Concerning a controlled compound lathe and its machining method.

l Jyoto Technology 1 In a numerically controlled compound lathe, two headstocks are arranged so that they can move in the Z-axis direction so that the chucks face each other on the spindle axis, and two cutters are mounted on each of them. Those with a stand are known. In this lathe, each workpiece gripped by the chuck of the main spindle is moved to the corresponding tool rest.
, the movement is controlled in the Z-axis direction by a numerical control device.

Alternatively, both ends of the long workpiece are gripped by opposing chucks, and the respective tool rests are driven and controlled in the same direction to process the workpiece.

This type of numerically controlled compound lathe grips the workpiece in the chucks of two spindle heads arranged opposite to each other in the Z-axis direction, and controls the movement of a single or multiple tool rests to perform turning as well as other secondary machining. For example, a numerically controlled compound lathe that performs complex machining such as milling, drilling, and tapping is known.

[Problems to be Solved by the Invention] However, there is a limit to increasing the machining feed rate in such turning machining due to the time constant of a drive mechanism such as a motor. If you try to make this happen,
There are problems such as high cost, and depending on the opposed spindle head, it takes time to transfer the workpiece.

This invention achieves the following problems based on the technical background as described above.

It is an object of the present invention to provide a numerically controlled complex family that reduces the machining time of single or multiple forces applied to a workpiece.

Another object of the present invention is to provide a numerically controlled compound lathe and a machining method thereof, which can shorten the delivery time of workpieces and achieve high productivity.

[F, stage 1 for solving the above problem In order to solve the above problem, the present invention adopts the following -F stage.

The first main shaft is rotatably supported on the 11th shaft head and has a chuck at the tip, and the first main shaft is rotatably supported on the 11th shaft head and has a chuck at the tip, and the Said number 1!
A second spindle head is slidably mounted in the same direction as the E-axis head, and a tip is rotatably supported on the throat of the second spindle on the same axis as the main axis of the first head. a second main shaft having a chuck facing the chuck;
A first saddle is provided on the base-L and is movable in a direction parallel to and orthogonal to the spindle axis to move toward and away from the first spindle head. a second saddle provided on the base so as to be movable in a direction parallel to and orthogonal to the spindle axis in order to move toward and away from the spindle head; a servo motor that drives in the shaft binding direction; A numerical control device for controlling the movement of the servo motor of the second saddle, and a coupling stage for connecting the first and second spindle heads to the corresponding first and second saddles. This is a numerically controlled compound lathe with special features.

This numerically controlled compound lathe connects the gutter to the first main spindle and the first saddle by the connecting means, and
The spindle head is fixed to the base L, and the connection between the second spindle head and the second saddle is released, and the first spindle head is attached to the second saddle by the first saddle.
Historically, this numerically controlled compound lathe is used in a machining method in which the workpiece is relatively moved in the axial direction and is gripped by the chuck of the first spindle head. by the coupling means, and the second saddle is coupled to the second saddle by the coupling means;
Connect the spindle head to the second saddle, and
A machining method in which a long workpiece gripped by a chuck of a spindle head is gripped by a chuck of the second spindle head, and pulled out in the direction of the spindle axis of the second saddle to process the long workpiece. good.

Historically, other main means include a first spindle head that is slidably mounted on a base, and a first spindle that is rotatably supported on the first spindle head and has a chuck at its tip. , a second spindle head that is slidably mounted on the base so as to face the first spindle head; a second main shaft that is rotatably supported on a shaft and has a chuck at its tip that faces the chuck; a first saddle that has a turret at one end for moving toward and away from the first main shaft head; and a second main shaft head. a second saddle having a turret at one end to move toward and away from the main shaft; a spindle head servo motor that drives the first and second spindle heads in the spindle axis direction; and a spindle head servo motor that drives the first and second spindle heads in the spindle axis direction This is a numerically controlled compound lathe that is comprised of a servo motor that drives in a direction and a direction perpendicular thereto, and a numerical control device that controls the servo motor and the spindle head servo motor.

This numerically controlled compound lathe positions the tool cutting edges of the first and second saddles at the tips of the workpieces gripped by the mutually opposing chucks of the first and second spindle heads, respectively, and It is desirable to provide a processing method in which a workpiece is machined by controlling the relative movement of the saddle and the first spindle head, and the second saddle and the second spindle head, respectively, in the direction of the spindle axis.

Further, the numerically controlled compound lathe grips both ends of the long workpiece with the chucks of the first and second spindle heads, and a first machining machine is provided at the machining end of the workpiece and at a position approximately dividing the total machining length into two. ,
A machining method may be used in which a tool on a second saddle is positioned, and the first and second spindle heads and the first and second saddles are controlled to move relative to each other in the spindle axis direction to machine a long workpiece.

Furthermore, the numerically controlled compound lathe grips one end of the elongated workpiece in the first spindle head with a chuck of the second spindle head, and pulls out the workpiece by moving the spindle head in the -E axis direction. At the same time, parting is performed using the tool rest of the first or second saddle, and then the tool cutting edges of the first and second saddles are positioned at the opposing ends of the divided workpieces, respectively. , Fi may be a machining method in which the first saddle and the first spindle head and the second saddle and the second spindle head are controlled to move relative to each other in the direction of the spindle axis to machine the workpiece.

[Function] According to the numerically controlled compound lathe and the machining method according to the present invention, the first and second spindle heads equipped with chucks are moved relative to each other on the axis so as to face each other in the axis direction of the spindle, The first and second saddles or the first and second saddles are moved relative to or synchronously with respect to each spindle head.This allows single machining or combined machining or conveyance of the workpiece, and reduces machining time. This makes it possible to shorten the delivery time and achieve highly efficient processing.

[Embodiment] An embodiment of a numerically controlled compound lathe and a machining method thereof according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is an overall side view showing an embodiment of the present invention. The base 1 is a base on which a machine tool is mounted. The structure of the base 1 is well known and not shown here.
A first spindle head 2 is provided which is slidably mounted in the axial direction. Although the first spindle head 2 can move in the Z-axis direction, it cannot move independently because it does not have a drive device. The first spindle head 2 can be fixed and released as necessary on the base 1 using a fixing means (not shown).

Furthermore, on the base 1, there is a Z
A second spindle head 3 is mounted so as to be movable in the axial direction. This second spindle head 3 is movable on the bed I, and can be fixed to and released from the bed 1 by a fixing means. A chuck 5.6 is rotatably provided at the tip of the main shaft provided in the second main shaft head 2.3 so as to face each other on the axis of the second main shaft. Furthermore, first and second saddles 7.8 are mounted on the base l so as to be slidable in two axial directions so as to be able to approach and move away from the first and second spindle heads 2.3.

The movement of the first and second saddles 7.8 in the Z-axis direction is carried out by separate Zl and two-axis servo motors (60.8 in FIG. 3).
66>. This first and second saddle 7.8
A turret tool rest 11.12 is provided rotatably indexable via a cross slide 9.10, respectively.

A tool is mounted on the turret tool rest 11, 12, and this tool can be indexed and used as needed. This turret tool rest 11.12 is movable in the X-axis direction by a cross slide 9.10.

The movement of the turret tool rest 11.
66>.

The first and second saddles 7.8 are also provided with coupling devices 13.14, which will be described later. This coupling device 13
．． 14 can be selectively coupled to the first and second spindle heads 2.3, respectively. The first saddle 7 is the first saddle 7.
When connected to the spindle head 2, the Xl-axis servo motor 51 is not operated, that is, the first spindle head 2 is
When driving only in the axial direction, the turret tool rest 11
cannot operate.

FIG. 2 is a sectional view showing the coupling device 13 or 14. A piston 17 is slidably inserted into a cylinder 16 formed inside the first or second saddle 13.14. The piston 17 is integrally equipped with a piston pin 1.
8 is provided. The piston pin 18 has a bushing 20 provided in a pin hole 19 attached to the first and second main shafts.
Insert the spindle head 2, 3 and the 1.2 saddle 7°8
supply. This engagement operation of the piston pin 18 is performed as follows:
The opening and closing of the solenoid valve 21 is controlled. Hereinafter, an example of machining the cutting system of this numerically controlled compound lathe will be explained.

FIG. 3 is a functional block diagram of the control device 50 of the numerically controlled lathe of the embodiment. The cross slide 9 is driven by an X1 servo motor 51 in the X-axis direction. The first saddle 7 on which the cross slide 9 is mounted is driven by an X1 servo motor 60. In the end, turret tool post 1
1 is NC-controlled in the X and X-axis directions. The movements of the X1 servo motor 51 and the Z1 servo motor 60 are controlled by a microprocessor 59.

The microprocessor 59 is provided with a switching circuit 57 via an interface 58 . The switching circuit 57 includes a stop lock a horizontal 54, a normal machining interpolator 55 for performing normal addition, and a double speed machining interpolator 5 for performing double speed machining.
6 are connected and selected for each processing mode. The stop lock mechanism 54 is a mechanism for locking the X1 servo motor 51 so that it does not operate. The normal machining interpolator 55 is an interpolator that interpolates tool movement in order to perform normal NC machining that is not double speed machining.

The double-speed machining interpolator 56 is an interpolator used when machining is performed by increasing the feed speed in the X-axis direction to twice or more, as will be described later. A movement command from the interpolator 55 or 56 drives the X1 servo motor 51 via the D/A converter 53 and amplifier 52. At the same time, Z in the ZlldI direction
1 servo motor 60 is driven via an interpolator 63, a D/'A converter 62, and an amplifier 761. Similarly, X2
The servo motor 64 and the Z2 servo motor 66 control the second saddle 8 and the cross slide 10 in the X and Z axis directions.

The flowchart shown in FIG. 4 is a flowchart showing the operation of the numerically controlled lathe. In the operation of the numerically controlled lathe, as shown in FIG. 1, a workpiece is first gripped by the chuck 5 of the first spindle head 2. Next, in the case of double speed machining, the first saddle 7 is connected to this first spindle head 2 by a coupling device 13 (
Step P3), XI servo motor stop lock mechanism 5
4 and lock the X1 servo motor 51 (
P.

). The second spindle head 3 is fixed on the bed 1 by a fixing means, and the connection between the second spindle head 3 and the second saddle 8 is released (P6), and the second saddle 8 is moved in the Z-axis direction by a numerical control device. Movement in the X and X axis directions is controlled.

'Select the double-speed machining interpolator 65 of the X2 servo motor 64 (p9) and drive the Z1-axis servo motor 60 of the first saddle 7 to move the first spindle head 2 on the base l in the Z-axis direction. .

2. Movement control of the second saddle 8 in the X and Z axis directions, and
When processing the workpiece 4 by relative movement of the saddle 7 in the X-axis direction, the feed rate in the X-axis direction becomes more than 7 times the speed, and double-speed machining in the X-axis direction becomes possible (P + o).
. During normal machining, the spindle head is fixed to the bed,
Perform normal processing.

FIG. 5 is an overall side view of a numerically controlled compound lathe showing another machining example. The tip of the long workpiece 15 held by the chuck 5 of the first spindle head 2 is passed through the chuck 6 of the second spindle head 3, and this chuck 6 is used as a steady rest for the long workpiece. do. The long workpiece 15 is
The connection between the spindle head 2 and the saddle 7 drives the machine in the Z-axis direction, and the relative movement of the second saddle 8 in the Z-axis direction enables double-speed machining in the Z-axis direction.

1L□± FIG. 6 shows still another example of processing. In this f-addition method, both ends of the long workpiece 4 are gripped by the chucks 5.6 of the first and second spindle heads 2 and 3, respectively. First spindle head 2
and the first saddle 7 are connected by a connecting means.

The first spindle head 2 moves in the Z-axis direction, and the long workpiece 4 also moves. If the second saddle 8 facing this is moved in the Z-axis direction, double-speed machining can be performed by relative movement between the two. At this time, the second spindle head 3 also moves at the same time because it is connected via the long workpiece 4.

FIG. 7 shows yet another processing example, in which the workpiece is cylindrical. One end of this cylindrical workpiece 22 is connected to the first end. Second
Grip it with the inner jaw of the chuck 5.6 of the spindle head 2.3,
Similarly to the above, for the synchronized movement of the two axes of the first and second upper axes and the first and second upper axes, the blade # of the second saddle 8; l 2
, thereby achieving fg speed machining.

Force 0J 2-work ±1□-, 4-8th (W (a), <b), (C) is the fourth force r
Shows Pi4. First, to the first main shaft...the throat 2 is fixed to the base 1 by a fixing means. Next, the opposing second spindle head 3 and second saddle 8 are connected by a connecting device. When the Z2-axis servo motor 66 of the second saddle 8 is driven, it moves to the first spindle head 2ffl. The chuck 6 of the second spindle head 3 grips one end of the long workpiece 23 held by the chuck 5 of the first spindle head 2 . 2nd saddle8. In this processing method, the Z2-axis servo motor 66 is driven, the second spindle head 3 is moved backward, and the liquid adding material 23 is pulled out to a predetermined position. can.

1st and 2nd saddles 7.8 compared to 1st and 2nd saddles
The spindle head 2.3 is configured to independently control its movement. Therefore, in the embodiment described above, the first,
A Z-axis servo motor for controlling the two-spindle heads 2 and 3 in the Z-axis direction was not provided. 1st and 2nd of this example
The spindle heads 2 and 3 (have a 73 servo motor 70 for controlling movement in the two-axis binding direction.
3. Through the D/A converter 72 and amplifier 71 1. Similarly, a 74 servo motor 80 drives the first spindle head 2.
The interpolator 83 and D
/' Drives the second spindle head 3 via the A converter 82 and amplifier 81.

Figure 10 is a schematic diagram showing the fifth processing example. First, add the same liquid 1-4 to the opposing chuck 24.25 26.27
grasp each. The detailed operation of the control device 2 is omitted because it is almost the same as that of the control device 1. Opposing workpiece! t
At the tip of JM26.27, position 28.29 of each tool rest 11.12 of the first and second saddles 7 and H. This positioned ball 4 cutting edge 28, 29 is moved in the Z-axis direction relative to the chuck 24, 25 that grips the workpiece 26, 27, and at the same time each chuck 24, 2
5 is also Z2. By driving the Z4 servo motors 70 and 80 and moving them relative to each other, two workpieces can be machined at double speed at the same time.

1u1-◇- Furthermore, a sixth processing example will be explained based on FIG. Both ends of the long workpiece 30 are gripped by the chucks 24 and 25 of the first and second spindle heads 2.3.

Move the tool 31 of the first saddle 7 to the middle position Jf of the workpiece 30.
33, and the tool 32 of the second saddle 8 is positioned on the chuck 25 side. The opposing first and second spindle heads 2.3 gripping the workpiece 30 are moved in the direction of the arrow shown in the figure. At the same time, the tool cutting edges 31 and 32 are relatively moved in the direction of the arrow to perform double speed machining.

Nori-i! FIG. 12 shows a seventh processing example. Similarly to FIG. 7, the workpieces 34 and 35 are placed on the chuck 24. ．． 25, and the tool 36 is positioned and fixed in the middle thereof. Chuck 24.2
It is possible to move the workpieces 34 and 35 gripped by the workpieces 5 and 5 closer to each other, and simultaneously process the ends of the workpieces 34 and 35. At this time, the outer diameter machining can also be performed at double speed using the five tools 36 at the same time.

Now, the eighth processing example will be explained based on Io's FIGS. 12 (a), (b), and (c). In this machining example, the chuck 6 of the second spindle head 3 grips one end of the workpiece 38 of the two first spindle heads and pulls out the workpiece 38. In synchronization with this drawing, the parting tool 39 is moved. Parting is performed while moving in the Z-axis direction (Fig. 13<a), (b)), that is, 2!
The servo motor 60 and Z4 servo motor 8() are synchronized. When the workpiece is pulled out by a predetermined amount, the chuck 5 of the first spindle head 2 also grips the workpiece.

The chucks 5 and 6 hold the workpieces 38a and 3 divided by cutting.
8b respectively. By moving relative to the tools 40 and 41 positioned at the tips of the workpieces 38a and 38b, the workpieces 38a and 38b are processed at double speed in the same manner as described above.

[Effect of the invention 1 As is clear from the above-mentioned embodiments, the same main axis -L
The first and second spindle heads equipped with chucks facing each other are moved relative to each other on the axis line, and the first and second saddles or the first or second saddle are moved relative to the respective spindles. Alternatively, by synchronous movement, it is possible to shorten the workpiece or shorten the machining time by compound machining, and to significantly shorten the transfer time, thereby achieving an effect of improving productivity.

[Brief explanation of drawings]

FIG. 1 is a side view of essential parts of a numerically controlled compound lathe showing a first embodiment of the present invention, FIG. 2 is a partial sectional view of a coupling device, and FIG. 3 is a functional block diagram of the numerical control device l. FIG. 4 is a flow diagram showing an overview of the operation of the numerical control device, FIG.
The figure is a side view of the main part of a numerically controlled compound lathe showing the third processing example of the present invention, FIG. Figure 8 (a>, (b), (
C) is an explanatory diagram of the delivery state of a workpiece by a numerically controlled compound lathe showing the fourth embodiment of the present invention, and FIG. 9 is the same as the function block tT7 of the numerically controlled device 2. FIG. 10 is an explanatory diagram of the system showing the fifth embodiment of the present invention, FIG. 11 is an explanatory diagram of the system showing the sixth embodiment of the present invention, and FIG. 12 is the seventh embodiment of the system of the present invention. An explanatory diagram of the Kanji system showing an example of processing, FIGS. 13(a), (b),
(c) is an explanatory diagram of a processing method showing an eighth processing example of the present invention. ■...Base, 2...1st spindle head, 3...2nd'
F.III! tl hesode, 4...workpiece, 5,6.
...Chuck, 7..First saddle, 8..Second saddle, (1), 10..Cross slide, 11.12
...Turret post, 1114...Coupling device, 22...Cylindrical workpiece, 23...Workpiece, object, object, ・'1 24.25...Chuck, 26.27...・Workpiece 2
8.29...Tool cutting edge, 30...Long workpiece 31.3
2,36,40.41...tool, 335.38...
Workpiece

Claims (1)

[Claims] 1. A first spindle head slidably mounted on a base;
A first spindle is rotatably supported on the first spindle head and has a chuck at its tip, and a second spindle is slidably mounted on the base facing the first spindle head in the same direction. a second main spindle that is rotatably supported on the second main spindle head on the same axis as the main spindle of the first head and has a chuck at its tip facing the chuck; and a tool rest; A first saddle is provided on the base so as to be movable in a direction parallel to and perpendicular to the spindle axis line in order to move toward and away from the head, and a turret is provided to move toward and away from the second spindle head. a second saddle provided on the base so as to be movable in a direction parallel to and orthogonal to the spindle axis; a servo motor that drives the first saddle and the second saddle in two orthogonal axes; It consists of a numerical control device that controls the movement of the servo motors of the first and second saddles, and a coupling means that connects the first and second spindle heads to the corresponding first and second saddles. A numerically controlled compound lathe characterized by: 2. In claim 1, the first spindle head and the first
by the coupling means, the second spindle head is fixed on the base and on standby, and the second spindle head and the second saddle are uncoupled, and the first spindle head is coupled to the second saddle by the coupling means. A method for machining a numerically controlled compound lathe, characterized in that a workpiece gripped by a chuck of the first spindle head is machined by moving a first saddle relative to a second saddle in the axial direction of the spindle. 3. In claim 1, the first spindle head is coupled to a first saddle by the coupling means, the second spindle head is coupled to the second saddle, and the first spindle head is gripped by a chuck. A processing method for a numerically controlled compound lathe, characterized in that the long workpiece is gripped by the chuck of the second spindle head and pulled out in the direction of the spindle axis of the second saddle to machine the long workpiece. . 4. a first spindle head slidably mounted on the base;
A first spindle is rotatably supported by the first spindle head and has a chuck at its tip, and a second spindle is slidably mounted opposite to the first spindle head on the base. a second main shaft that is rotatably supported on the second main shaft head on the same axis as the main shaft of the first head and has a chuck at its tip facing the chuck;
a first saddle having a tool rest at one end for moving toward and away from the spindle head; a second saddle having a tool rest at one end for moving toward and away from the second spindle head;
a spindle head servo motor that drives the second spindle head in the spindle axis direction; a servo motor that drives the first and second saddles in the spindle axis direction and a direction perpendicular thereto; and the servo motor and the spindle head. A numerically controlled compound lathe comprising a servo motor and a numerical control device that controls the servo motor. 5. In claim 4, the tool cutting edges of the first and second saddles are respectively positioned at the tips of the workpieces gripped by mutually opposing chucks of the first and second spindle heads, and A method for machining a numerically controlled compound lathe, characterized in that a workpiece is machined by controlling the relative movement of a saddle and a first spindle head, and of a second saddle and a second headstock in the direction of the spindle axis. 6. In claim 4, the chucks of the first and second spindle heads grip both ends of the long workpiece, and the first and second spindle heads are placed at the machining end of the workpiece and at a position substantially dividing the total machining length into two. A numerical value characterized in that the tool of the second saddle is positioned, and the relative movement of the first and second spindle heads and the first and second saddles in the spindle axis direction is controlled to process a long workpiece. Control compound lathe machining method. 7. In claim 4, one end of the elongated workpiece of the first spindle head is gripped by a chuck of the second spindle head, and the workpiece is pulled out by movement of the spindle head in the spindle axis direction. Parting off is performed using the tool rest of the first or second saddle, and then the tool cutting edges of the first and second saddles are positioned at the opposing tips of the divided workpiece, respectively, and the tool rests of the first saddle are cut off. A method for machining a numerically controlled compound lathe, characterized in that a workpiece is machined by controlling the relative movement of the first spindle head, the second saddle, and the second spindle head in the spindle axis direction.