JPH02298403A - Turret width blade board and back process blade board - Google Patents

Abstract

PURPOSE:To perform process work synergetically with a main shaft chuck by providing a sub chuck and tools on a turret width blade board driven in an orthogonal two-shaft line so as to be freely divided on a position of use, and by providing a rotation driving means for the rotation and driving of the sub chuck. CONSTITUTION:On a frame, a turret width blade board 8 is installed so as to be driven in orthogonal two-shaft line by a servo-motor. On the turret width blade board 8, a sub chuck by which a work is gripped, and tools are provided so as to be divided on a position of use by a dividing means. By the sub chuck 11 on the turret width blade board 8, the work gripped by a main shaft chuck 4 is received and gripped, and is divided on a position of process of a back process blade board 5. The work gripped by the sub chuck 11 and by the main shaft chuck 4 is processed by the tool on the back process blade board 5.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a turret sub-tool rest for back processing and a back processing tool rest. More specifically, in turning machining, a chuck for holding the workpiece is provided on the turret 1 to sub-turret, the held workpiece is indexed, and the back-machining turret installed facing the main spindle is used to perform mainly back-machining. It relates to the turrets I - sub-tool rest and back processing tool rest.

[Prior Art] A normal type NC lathe is usually equipped with a turret 1. This turret tool rest has a plurality of tools, and performs desired machining by indexing the tool to be used depending on the machining.

To perform back machining, that is, machining the back side of a workpiece held in a chuck, with this normal type NC lathe, the main spindle is stopped, the workpiece is removed from the chuck, the workpiece is turned over, and then the The back side is processed by chucking again. This reversing operation of the workpiece is performed by Manny'7-
It is carried out with al or loch l-han 1~ etc.

Among various conventionally known NC lathes, the opposed type 2 has a sub spindle opposite the main spindle.
NC lathes with axial spin type 1 to 1 are known. This type also has two turret tool rests 7 for machining workpieces held on each spindle. each spin 1
There is a work chuck in the ~le, and a Zaffbin 1
The spindle is driven by NC- (numerical control) to grip the work toward the main spindle. This opposed type 2-axis spin 1~le lathe uses the main spindle to apply one end of the workpiece, and then processes the other end of the workpiece by chucking it into the sub spindle (a regular chuck). A processing apparatus and a processing method are known (for example, Japanese Patent Application Laid-Open No. 63-272401).

[Problem to be Solved by the Invention J] However, when the above-mentioned type of opposed type two-axis spin 1 to rotary lathe is used, for example, when performing back machining, the chuck installed on the main spindle and the chuck installed on the At the same time, the workpiece is gripped and the workpiece is transferred.

For this reason, servo motors are installed to move both the main spindle and the main spindle in the Z-axis direction, the turret direction, and the spindle axis direction.It is necessary to drive the headstock as well as the tool rest. The structure is simply a normal spindle structure in which the rough spin 1 hel transfers the workpiece, grips the workpiece, and rotates.This invention was invented by focusing on the above-mentioned problems. Our goal is to achieve the following objectives.

An object of the present invention is to provide a turret sub-tool rest and a back processing tool rest that are linked to the main tool rest and can perform front and back processing of a workpiece.

Another object of the present invention is to provide a turret sub-tool rest and a rear surface that allow machining of the workpiece held by the main spindle chuck and the workpiece gripped by the sub-chuck of the turret sub-turret at two locations at the same time with the same machine. Our purpose is to provide processing tool rests.

Still another object of the present invention is to provide a structure for a turret 1 to sub-turret in which driving and indexing of the sub-chucks of the turret I to sub-turret can be performed by the same servo motor. .

“Another way to solve the above problem] In order to solve the above problem, the following measures are taken.

The first means consists of a frame constituting the main body, a spindle driven in the same rotation, a spindle chuck provided on the spindle for gripping a workpiece, a main tool rest containing a plurality of tools, and a secondary blade anastomosis to the cleat 1. In a numerical control-1 machine tool, a) the frame is equipped with a servo motor that drives the turret sub-turret in two orthogonal axes; ′,′i
a sub-chuck and a plurality of tools; It has a driving means, e. The sub-chuck receives and grips the workpiece gripped by the main-axis chuck.

A second means, in the first means, includes: a) driving the rotational drive means and the indexing means described in 111f by the same servo motor; and b selectively switching the driving of the servo motor to the indexing means. This is a turret secondary tool rest that uses crudging means.

A third means is, in the first means, a. A back processing tool rest is arranged to sandwich the turret to the sub tool rest and face the main spindle chuck, and b. The back processing tool rest includes a plurality of back processing tool rests. A back processing tool rest comprising a tool, and c) an indexing means for indexing a necessary tool to a use position of the back processing tool rest.

[Function] The frame that constitutes the main body, the main shaft that is rotationally driven, the main shaft chuck that is installed on the main shaft and grips the workpiece, the main tool rest that has a plurality of tools, the turret l to sub tool rest, and the back This is an NC machine tool consisting of a processing tool post. The turret sub-turret has a sub-chuck for gripping a workpiece and a tool.

The turret I to sub-turret receives and grips the workpiece gripped by the main spindle chuck with a sub-chuck, and indexes it to the processing position of the back processing tool rest.

The back processing tool post is equipped with a plurality of tools.

The rear processing tool rest indexes the necessary tools to the usage position,
Machining the workpiece on the sub-chuck.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view of an NC lathe to which the turret I to sub-tool rest and back processing tool rest of the present invention are applied. Bed 1 is
It is a horizontal relic made of well-known metal materials such as cast iron. A sliding or rolling guide surface is provided on the bellows 1 to 1 as necessary.This guide surface is provided with a secondary knife sound 8, a main tool rest 7, The back processing tool rest 5 or the like is movably provided by being driven by a servo motor.The detailed structure of the spatulas 1 to 1 is well known and will not be described in detail here.

At one end of the head 1, a headstock 2 is provided.

This headstock 2 does not move, and is a box-shaped structure fixed to the head 1 by a means such as a pole I.

A main spindle 3 is rotatably supported within the main spindle 2. The spindle 3 is driven by a motor (not shown) provided on the headstock 2. This main shaft 3 also has a configuration that allows C-axis control, that is, rotation indexing around the main shaft axis. A spindle chuck 4 is provided at the tip of the spindle 3. Spindle chuck 4
This grips and releases the second crop W by opening and opening the claws using hydraulic pressure.

On the other hand, a back processing tool rest 5 is provided at the end of the head I-1 at a position facing the headstock 2. Back processing tool post 5
can be positioned at a desired position by a servo motor (not shown) in the W-axis direction parallel to the Z-axis.
Do not move it during processing. However, if the NC device has control capability, simultaneous control may be performed during processing. Back processing tool post 5
As will be described later, the machine is equipped with a rotary tool such as a helical hel, a metal saw, and a turning tool, and when using it, the necessary tool is determined and used. A main tool rest 7 is provided above the blades 1 to 1.

The main tool rest 7 is
It is slidably moved along the Z-axis by the shaft servo motor 9. The main tool post 7 is driven in the X-axis direction by an X-axis servo motor (not shown). The main tool rest 7 is also driven in the Y-axis direction perpendicular to the Z-axis. The main tool rest 7 has a plurality of cutting tools and rotary tools provided on the outer periphery of an annular turret body. In the end, the main tool rest 7 has X, Y,
This is a tool post that allows you to select the necessary tool by controlling the Z-axis position. These X, Y, and Z axes are controlled by a numerical control device (not shown).

On the front side of the bellows l~1, there are 8 auxiliary cutter sounds. The secondary knife sound 8 is similar to the main tool rest 7, such as X, Z! At the same time, each of the 11 directions is driven and controlled by a servo motor,
The necessary tools for the secondary blade anastomosis 8 are determined. The indexing axis of this secondary knife sound 8 is centered on the Y-axis. The numerical control device includes the main spindle 3, the back processing tool rest 5, and the main tool rest 7.
This is a control device that numerically controls the rotation, movement, and indexing of the sub-cutter sound 8 to the turret 1. This structure and function are well known and will not be described here.

-, 1F') - Turret auxiliary tool rest FIG. 3 is a partially cutaway plan view of the turret auxiliary tool rest 8. FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. The turret sub-turret 8 has a plurality of taps 59 radially,
This is a turret tool post equipped with a rotating tool such as a drill 55 and a turning tool 54.

For example, a tap 59, which is a rotary tool, is held by a tap chuck 58. The tap chuck 58 is provided at one end of the tap shaft 57, and a bevel gear 56 is keyed to the other end of the tap shaft 57. Secondary blade anastomosis turret 1
0 has a hexagonal planar shape and a thickness.

On each side of the hexagon, a rotating tool 55.59, a turning tool 54,
The sub chuck 11 is attached. The secondary blade anastomosis turret 10 is placed on the cross table main body 40, and the secondary blade anastomosis turret 1 is moved by the movement of the cross table main body 40 during cutting.
Processed with a tool set at 0. Secondary blade anastomosis turret l~10
On one side, a turret shaft] 2 is rotatably supported at both ends by bearings 13 and 13 that can withstand loads in the thrust direction.

A flange surface 17 is provided at one end of the shaft 12 from the turret I. On the flange surface 17, sub-blade anastomosis turrets l-1 and O are ported and fixed in close contact with this surface. A cam follower 18 is provided on the turret 1IIll112 between both bearings 13, 13, with the central axis perpendicular to the axis of the turret shaft 2.

The cam follower 18 is rotatably provided on the shaft via a hair link or the like. The cam follower 18 is connected to the turret shaft 1
A plurality of them are provided at equal intervals around the outer periphery of 2.

On the other hand, a spiral hot water is formed on the outer periphery of the roller gear cam b rotatably supported by the cross body 40 (this is well known and not shown). In this lecture, the above-mentioned cam follower]
8 are stuck together.

The roller gear cam 19 rotates around the axis 2o. A spur gear 21 is fixed to the shaft 20 of the roller gear cam 19 (FIG. 5). A spur gear 22 meshes with the spur gear 21 .

The spur gear 22 is keyed to one end of the shaft 23, and the other end of the shaft 23 is provided with a spline formed on the shaft 23.
A shift spur gear 24 is provided so as to be able to freely slide. The shift spur gear 24 meshes with and disengages from the pinion gear 25 by a shift mechanism described later. Binion gear 25
is a gear keyed to the output shaft 26 of the servo motor 27. On the other hand, a U-shaped shifter 28 is arranged on the outer periphery of the shift spur gear 24.

The shifter 28 has a U-shaped engagement groove 29, into which the shift spur gear 24 is inserted with play. A pin 3o is provided to protrude into the engagement groove 29 of the shifter 28. The tip of the pin 30 is formed into a tapered shape. On the side surface of the shift spur gear 24, a bottle hole 31 is formed only at the - mark. This pin hole 31 is for inserting a pin 3° to position the roller gear cam 19 at a predetermined angular position. The shaft 32 of the shifter 28 includes
A piston 33 is integrally provided.

The piston 33 is inserted into the cylinder 34, and by introducing air pressure into the cylinder 34, the shifter 2
8 to cause the shift spur gear 24 and pinion 25 to engage and disengage. Shifter 28 or right (
When moving to "2)" shown in the figure, the pinion 25 and shift 1 to spur gear 24 engage with each other. At this time, the pin 30
It deviates from 1. The shift 1 spur gear 24 rotates the roller gear cam b once and positions the pin 30 so that it always matches the position of the bottle hole 31.

When removing the shift spur gear 24 from the pinion 25 again,
Even when the motor 27 is driven to rotate the tool, it is positioned so that the pin 30 enters the pin hole 31 so that there is no phase shift. The center of the turret shaft 12 is located at the center hole 41 (FIG. 4). A drive shaft 42 is rotatably provided in the center hole 41 with both ends supported by bearings. A bevel gear 43 and a bevel gear 44 are keyed to both ends of the drive shaft 42 . A shaft 46 is perpendicular to the drive shaft 42.
is rotatably supported by the cross base main body 40 by a bearing 48.

A bevel gear 45 and a bevel seal 47 are fixed to both ends of the shaft 46. The bevel gear 47 further meshes with four bevel gears (FIG. 6). The bevel gear 49 is keyed to one end of the shaft 50. The shaft 50 is the cross stand main body 40
is rotatably supported. A spur gear 51 is keyed to the other end of the shaft 50, a spur gear 52 meshes with the spur gear 51, and a pinion 25 meshes with the spur gear 52. The pinion 25 is keyed to an output shaft 26 of a servo motor 27.

The servo motors 27 rotate the sub chuck 11 and rotate] two sets 5
5, etc. That is, the bevel gear 44 (FIG. 4) of the drive shaft 42 meshes with the bevel gear 60. The bevel gear 60 is keyed to one end of the back processing chuck shaft 61. In the end, the servo motor 27 rotates the tool or sub-chuck 11 and rotates the turret shaft 1.
Perform rotation indexing in step 2. The other end of the back processing chuck shaft 61 is integrally connected to the back processing chuck body 62. At the center of the upper part of the secondary blade anastomosis turret 10, flanges 38 of three fluid pressure joint shafts are fixed with ports 1 to 1.

A circular tubular joint vibro 3 is provided on the outside of the fluid pressure joint shaft 39.
is rotatably provided. On the outer periphery of the joint Vibro 3,
There is a supply D 64 for supplying air pressure, which is supplied by an air pressure supply pipe (not shown). After all, the joint vibro 3 and the fluid pressure joint shaft 39 constitute a fluid pressure rotary joint that supplies fluid pressure to the rotating shaft. The air pressure supplied from the supply port 64 is passed through the air pressure path 65 in the fluid pressure joint shaft 39,
The claws of the back processing chuck body 62 are driven through the air passage 66 in the back processing chuck shaft 61.

The cross table main body 40 is driven in the X-axis direction by an X-axis servo motor 70 (FIG. 5) via a ball screw. A pulley 7 is attached to the output shaft 7 of the X-axis servo motor 70.
1 is the default. On the other hand, inside the cross stand main body 40,
The ball is fixed at 1-75. Paul Nala 1-7
5 has a pole screw 74 screwed into it in the X-axis direction. The ball screw 74 is rotatably supported on a carriage 80 by a bearing 81 so as to be immovable in the axial direction.

A pulley 73 is fixed to one end of the ball screw 74. Timing bells 1 to 72 are connected between pulleys 73 and 71. Therefore, when the X-axis servo motor 70 is rotated, the pulleys 71 and timing
, the ball screw 74 is rotationally driven via the pulley 73. When the ball screw 74 is rotated, the pole nut 7
5 moves in the χ axis direction, and the cross table 40 moves in the direction of the χ axis.
It rolls on the second rolling guide surface 82.

On the lower surface of the carriage 80 (as shown in FIG. 4), two guide surfaces 83 and 83 are formed in the shape of a letter ``■'' in the Z-axis direction. This guide surface 8B moves while being guided by roller guide surfaces 84 and 84 provided on the bellows 1 to 1''2. Pole nuts 85 are fixed to heads I to 11 of the reciprocating table 80, and Z-axis ball screws 86 are screwed into the pole nuts 1 to 85. Shift/Q directional, Z-axis servo motor (not shown)
By driving the carriage 80, the roller guide surface 84
．． Move on 84.

=17- One side machining tool FIG. 7 is a sectional view of the back machining tool rest 5, and FIG. 8 is the indexing drive device portion of the same tool rest 5.

The back processing tool post 5 is mounted on a moving table (not shown) that is driven only in the Z-axis direction by a Z-axis servo motor. The main body 90 is placed and fixed on a moving table. Main body 9
0, the turret l~shaft 91 is rotatably mounted on a bearing 92.9.
Supported by 2. A gear 93 is formed on the outer periphery of one end of the turret shaft 9.

A rack gear 94 is meshed with the gear 93. The rack gear 94 is provided to intersect with the turret shaft 91 in a direction perpendicular to it. A piston 95 is integrally provided at one end of the rack gear 94. The screws 1 to 95 are inserted into the cylinder chamber 96. A small diameter portion 98 is formed at the other end of the rack 94, and the small diameter portion 98 is inserted into the movable piston 97. The moving screw I~n 97 is connected to the cylinder chamber 99.
It is inserted inside and moves around this room.

This cylinder device is in the state shown in FIG. 8, with the screws 1 to 95 moved to the right end, and the moving piston 97 is in
You can select from three positions, with the inside moved to the left end. The gear 93 is rotated by the movement of the rack gear 94, and the turret shaft 91 is rotated to index a necessary tool and take a neutral position where no tool is used. A positioning hole 100 is formed on the outer periphery of the turret shaft 91.

On the other hand, screws 1 to 101 are attached to the cylinder 10 in the main body 90.
It is inserted in 3. The tip 102 of the screw 1-01 is inserted into the positioning six 100 of the shaft 9 into the turret 1,
The shaft 91 is positioned and fixed to the turret 1. Turret shaft 91
A turret main body 104 is fixed to the tip of the turret. A cutting tool 105 and a metal saw 106 are attached to the tip of the turret body 104. The metal saw 106 is fixed to one end of the shaft 107. The shaft] 07 is rotatably supported by the turret body 104.

A bevel gear 1.08 is keyed to the other end of the shaft 107. The bevel gear 108 meshes with the bevel gear 1°9. The bevel gear 109 is keyed to one end of the drive shaft 110. Drive shaft]]0 is the turret body 104
The turret l is rotatably supported by a bearing 111 on the shaft 91, and a bearing 111 on the shaft 91.

The rear end of the drive shaft 110 is connected to the output shaft 11 of the drive motor 1]2.
Keyed to B. The drive motor 112 includes an output shaft 113, a drive shaft 110, a bevel gear 109, and a bevel gear 10.
8. Axis] 07. Drive the metal saw 106 to rotate.

In the machining example shown in FIG. 9 (a), the main chuck 4 of the main spindle 3 grips and fixes the workpiece W, and the tap 59 of the secondary blade anastomosis 8 (FIG. 3) performs tapping at the same time as the main tool rest 7. This is an example of cutting the outer periphery of the pipe 1.The rotation of the tap 59 is driven by the servo motor 27.The output of the servo motor 27 is
Output shaft 26, pinion 25, spur gear 52, spur gear 51,
Shaft 50, bevel gear 49 (see Figure 6), bevel gear 47,
Bevel gear 45, bevel gear 43, drive shaft 42, bevel gear 4
4 (Fig. 41), bevel gear 56, tap 1lil115
7, a tap chuck 58 and a tap 59 (see FIG. 3) are rotationally driven.

The rotational speed of these five taps is determined by adjusting the rotational speed of the servo motor 27 to the rotational speed of the main spindle 3. It is necessary to perform cutting and machining simultaneously with the main tool rest 7 at a cutting speed suitable for the tap 59. control. The outer periphery cutting by the main tool rest 7 is performed at a cutting speed suitable for cutting.

Simultaneous machining can be performed using the main tool rest 7 and the secondary blade anastomosis 8 at the optimum machining speed.

What is shown in FIG. 9(b) is an example in which both ends of the workpiece W are chucked simultaneously with the chuck 4 and the sub-chuck 11 to perform parting. The servo motor 27 is driven to drive the sub chuck 11 in the same manner as in the processing example shown in FIG. 9(a). Since the main chuck 4 and the sub-chuck 11 are not rotated synchronously, cutting can be performed at parting-off high 1. Therefore, immediately after cutting, the turret L to the sub-tool rest 8 are reversed, and the back processing tool rest 5 It is possible to process the back side. At the same time, the workpiece W of the main chuck 4 is also subjected to the next processing.

Immediately after the cut-off process is completed, the turret body 10 is turned over by 180 degrees. This reversing operation, that is, the indexing operation is performed as follows. Hydraulic pressure is introduced into the cylinder 34 (see FIG. 5), the screws 1 to 33 are driven, and the shifter 28 is moved. The shifter 28 moves the spur gear 24 to the shifter 1 and meshes with the pinion 25. The servo motor 27 starts rotating and drives the pinion 25, shift l-spur gear 24, shaft 23, spur gear 22, spur gear 21, shaft 20,
The roller gear cam b is rotationally driven.

The roller gear cam 19 drives the cam follower 18 to rotationally index the turret shaft 12, and then stops the servo motor 27. After this indexing is completed, the shifter 28 is returned to its original position, the bottle 30 is inserted into the bottle hole 3], and the shift spur gear 24 is locked. Rotate the servo motor 27 again, and
- 11 is driven by the power transmission path described above. After this,
[Sub chuck] Necessary machining is performed on the workpiece W of 1 using the back machining tool rest 5. At this time, the sub-blade anastomosis 8 is NC-driven in the X and Z axis directions to process the end face of the workpiece W of the sub-jack 11. During this time, the main chuck 4 performs normal machining using the tools on the main tool post 7.

The control devices for the movement of the main spindle 3, main turret 7, turret auxiliary turret 8, and back processing turret 5 have not been mentioned. These are controlled by an NC device, and are controlled by a pre-installed block diagram.

[Other Embodiments] Although the main tool rest 7 has a special annular shape, it is not limited to this, and may be a normal turret tool rest. Further, the above-mentioned back processing tool rest 5 may be a metal saw, a cutting hide, or other processing tools such as a drill, a tap, and a milling cutter.

[Effects of the Invention] As detailed above, the turret sub-turret for back processing of the present invention is equipped with a sub-chuck and can perform processing work in cooperation with the main-axis chuck, resulting in efficient processing. I was able to make it happen. In addition, a rear machining turret is installed, so machining can be done in two places, making it possible to achieve highly efficient machining.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of an NC lathe to which the turret turret and back processing turret of the present invention are applied, and Fig.
Figure 3 is a front view of the turret l to sub-turret with a section cut away, No. 41 is a cross-sectional view of IV-TV in Figure 3,
Figure 5 is a sectional view showing the power transmission mechanism that switches between tool rotation drive and turret indexing drive, Figure 6 is a sectional view showing the rotation drive mechanism of the rotary tool, and Figure 7 is Tsuzo of the back processing tool rest. Figure 8 is a cross-sectional view showing the indexing drive mechanism of the back processing tool rest, Figures 9 (a), (b), and ((D) are the use of the sub-turret tool rest and the back processing tool rest. It is a figure which shows an example.

Claims (1)

[Claims] 1. A frame constituting the main body, a rotationally driven main shaft, a main shaft chuck provided on the main shaft to grip a workpiece, a main tool rest having a plurality of tools, and a turret sub-tool rest. A numerically controlled machine tool comprising: a. The frame includes a servo motor that drives the turret sub-turret in two orthogonal axes, and b. The turret sub-turret includes a sub-chuck for gripping a workpiece and a plurality of sub-chucks. c. an indexing means for indexing the tool or the sub-chuck to a use position; d. a rotational drive means for rotationally driving the sub-chuck; and e. the tool and the sub-chuck. The sub-chuck is a turret sub-tool rest capable of receiving and gripping the workpiece gripped by the spindle chuck. 2. In claim 1, the turret comprises: a. The rotation drive means and the indexing means are driven by the same servo motor, and b. The driving of the servo motor is performed by a clutch means that selectively switches the driving of the servo motor to the indexing means. Secondary turret. 3. In claim 1, a. A back processing tool post is arranged to sandwich the turret sub tool post and face the main spindle chuck, b. The back processing tool post is provided with a plurality of tools, and c. The back processing tool rest is characterized in that the back processing tool rest has an indexing means capable of indexing a necessary tool to a use position.