JP2003245804A - Slide structure of tool rest for machine tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide, in the slide structure of a tool rest for a machine tool, a structure that makes more compact the tool rest while avoiding an interference at the time of chucking of a work to a main shaft or transferring. <P>SOLUTION: In the slide structure of the tool rest 6 for a machine tool, an X-axis direction feed rest 8 is installed on a Y-axis direction feed rest 9 in a manner that sliding movement toward the Y-axis direction is made possible. On the side of the X-axis direction feed rest 8, a stationary guide block and a nut unit are arranged, while a moving guide rail and a feed screw shaft are installed on the side of the feed rest 6. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is effective in reducing the size of a slide movement control device for a tool rest in a machine tool in the X-axis direction and the Y-axis direction and improving work transferability between two opposed spindles. The present invention relates to a tool post slide structure for a machine tool.

[0002]

2. Description of the Related Art In a machine tool such as a lathe, various kinds of machining are performed by holding a work on a spindle by a chuck and mounting a tool on a tool post side. Especially, in the two-spindle facing type lathe, by transferring the work between the two spindles,
It is possible to machine the entire work including the chuck grips, and simultaneously machine in parallel on the spindles on both sides. Therefore, the turret provided in such a lathe is
A large stroke is required in the axial direction, and movement control in the X-axis direction and the Y-axis direction is required. Further, for machining an inclined surface or an inclined hole for a work, a B-axis turning control device is often provided in the tool post.

The X-axis direction, the Y-axis direction of such a tool post,
Conventionally, a slide structure of a tool post incorporating a turning device around the Z-axis and around the B-axis has been shown in FIG. 5, for example. Two headstocks 101L, 101 arranged on the same axis and facing each other in the center of a bed 130 of the machine tool.
R is provided. Each headstock is provided with chuck portions 102L and 102R whose rotation is controlled by the spindle motors 103L and 103R. Headstock guide rails 111 and 112 are provided so that the headstock can move. Above the back side, the Z-axis direction tool rest guide rails 115 and 116 are provided on the bed, and the Y-axis direction feed base 108 is provided so as to control the slide movement in the Z-axis direction, and the tool rest 110 is provided thereon. There is. Below the main shaft, a turret tool 105 is provided via a turret tool post 104.
Turret tool post guide rails 113, 11
4, the Z-axis direction slide movement control is possible. The turret tool post 104 can also be controlled to slide in the X-axis direction.

FIG. 4 shows the sliding structure of the tool rest on the upper back side in this conventional machine tool. From the center upper part of the bed 130 to the back side, the Z-axis direction tool post guide rail 115,
116 is provided, and a Y-axis direction feed base 109 that strokes in the Z-axis direction along this guide rail is provided. A guide rail 117 on the side of the X-axis direction feed table that is in sliding contact with the guide block 118 provided on the Y-axis direction feed table 109.
A substantially T-shaped X-axis direction feed base 108 is disposed via the so that the Y-axis direction slide movement can be controlled. A fixed guide rail 119 is provided on the X-axis direction feed base 108, and a tool block side guide block 120 slidingly contacting the guide rail 119 is provided.
The tool rest 106 is provided via the. Turret 106
A B-axis turning control device 110 is attached to this, and various rotary tools or turret tools 107 are attached to this B-axis turning control device.

Thus, the conventional tool rest 10 shown in FIG.
In the slide structure of No. 6, a space for arranging the fixed guide rail 119 on the X-axis direction feed base 108 is required, and the dimension in the height direction (Y-axis direction) is required to mount the tool rest on the guide rail 119. In particular, when the B-axis rotation control device 110 is attached, more space is required for that, and the weight of the tool post is increased. 108, the slide structure is increased in size to secure the rigidity of the feed base 109 in the Y-axis direction. Further, when such a slide becomes large, the distance a between the spindle 102R and the bed upper surface becomes large as shown in FIG. 4, and the X-axis feed bar 108 interferes with the work between the two spindles 102L and 102R. Cutlery 10 to prevent
The size b of the shaft 7 and the main shafts 102L and 102R must be large, and the moment applied to each feed bar and the guide rail becomes large.

[0006]

In view of the technical problems inherent in the above-mentioned prior art, the present invention is capable of reducing the a dimension and the b dimension shown in FIG. 4 in the conventional tool post slide structure. It was focused on that if the slide structure of (1) is obtained, the moment applied to each guide rail or guide block will be reduced and the required rigidity will be reduced accordingly. That is, it is an object of the present invention to provide a slide structure of a tool post that allows a more compact design while avoiding interference when chucking or delivering a work to a spindle in a tool post slide structure of a machine tool. .

[0007]

The invention according to claim 1 is
In the slide structure of the tool rest of the machine tool, the Y-axis feed is equipped with the X-axis feed so that the Y-axis slide movement can be controlled, and the fixed guide block and the nut portion are provided on the X-axis feed. , Equipped with a movable guide rail and a feed screw shaft on the tool post side.

As described above, the guide rails conventionally provided on the X-axis direction feed table are fixed, and the feed screw shaft is provided between the two guide rails to rotate the guide rails.
While the turret moved through the guide block and the nut portion provided on the turret side, the present invention is completely opposite, for example, as shown in FIGS. The block guide 20 and the nut portion 8b are provided, and the movable guide rail 19 and the feed screw shaft 6b for moving operation are provided on the tool rest 6 side. The conventional fixed guide rail that protrudes above the base is eliminated. The details will be described in the embodiment.

According to a second aspect of the present invention, the tool rest according to the first aspect is provided with a B-axis turning control device. By adopting the turret slide structure according to the first aspect, it is possible to design a compact structure even if the B-axis turning device is attached to the turret.

A third aspect of the present invention is a development of the first aspect of the invention in a two-spindle facing type lathe, which is provided with two spindles arranged on the same axis so as to face each other, and Z is provided above the spindles.
Equipped with a Y-axis feed table to control axial slide movement,
This Y-axis feed table is equipped with an X-axis feed table so that Y-axis slide movement can be controlled, a fixed guide block and a nut portion are provided on the X-axis feed table side, and a movable guide rail and a nut guide section are provided on the tool post side. Equipped with a lead screw shaft.

As described above, since the protruding portion of the fixed guide rail, which is conventionally provided on the side of the X-axis direction feed table, can be eliminated, there is no interference at the time of delivering the work between the two main spindles. It is possible to bring the turret closer to the spindle.

The invention according to claim 4 is the same as the invention according to claim 3
Since the B-axis swivel control device is attached to the rear tool post of the main spindle facing lathe, the tool post slide structure of the present invention works more effectively.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION A preferred embodiment of the present invention will be described below with reference to the drawings. A part common to the prior art will be briefly described and a characteristic part will be described in detail. FIG. 1 shows a main part configuration diagram of an example in which the present invention is applied to a two-spindle facing lathe, and FIG. 2 shows a side view part of a tool post slide structure with a B-axis turning control device.

Two headstocks 1L and 1R are arranged in the center of the bed 30 in the left-right direction so as to be opposed to each other on the same axis, and in the example shown in the figure, the right headstock 1R includes the headstock guide rails 11 and 12. It is possible to make a stroke in the Z-axis direction through the workpiece, and the work can be transferred between the left main spindle chuck portion 2L and the right main spindle chuck portion 2R. In addition, spindle motors 3L and 3R are attached to the left and right spindle stocks 1L and 1R, respectively.

Below the headstock, a turret tool 5 is slidably controllable in the Z-axis direction by turret tool post guide rails 13 and 14 via a turret tool post 4, and in the X-axis direction. The slide movement is also controllable. Although the example of FIG. 1 shows an example in which only one turret tool post is provided on the lower side, providing two left and right turret tools is an arbitrary design matter.

A tool rest 6 with a B-axis turning control device 10 is mounted above the back of the main shaft, and a turret tool 7 is mounted on the tool rest 6 in the example of FIG. It is needless to say that a tool spindle shaft can be provided instead of this turret tool, and an ATC device can also be installed together if necessary. The slide structure of this tool rest is shown in FIGS. 2 and 3. Z-axis tool post guide rails 15 and 1 from the top to the back of the bed 30 of the machine tool
6 is provided, and a Y-axis direction feed base 9 is provided so as to slide the guide blocks 9b, 9b in sliding contact therewith. The Y-axis direction feed base 9 is provided with a feed screw shaft (not shown), and the feed screw shaft drive motor 9a can control the slide movement in the Z-axis direction.

A guide block 18 is provided above the Y-axis direction feed table 9, and an X-axis direction feed table side guide rail 17 is slidably engaged with the guide block 18. This X
The axial feed base 8 is provided with a screw feed shaft (not shown), and a drive motor 8a thereof is attached to the screw feed shaft. A fixed guide block 20 is provided on the X-axis direction feed base 8 side, and a movable guide rail 19 that slides in sliding contact with the fixed guide block 20 is provided on the tool rest 6 side. The relationship between the fixed guide block 20 and the movable guide rail 19 is shown in FIG. X-axis direction feed stand 8
Two fixed guide blocks 20, 20 are provided on the side, and movable guide rails 19, 19 are slidably fitted on the tool rest 6 side in a corresponding manner. A feed screw shaft 6b is provided on the tool rest 6 side, and a nut portion corresponding to this is attached to the X-axis direction feed base 8 side. Therefore, the feed screw shaft drive motor 6b for driving the feed screw shaft 6b is also provided on the tool rest 6 side.

[0018]

According to the present invention, the movable guide rail and the feed screw shaft are provided on the tool rest side, and the fixed guide block and the nut portion are provided on the feed stand side in the X-axis direction. As compared with the structure, the A and B dimensions shown in FIG. 2 can be made smaller, and a more compact slide structure of the tool rest and a two-spindle facing lathe can be obtained. Further, in the two-spindle facing lathe, the interference of the X-axis direction feed table can be prevented, and the work can be transferred between the left and right spindles in an excellent structure.

[Brief description of drawings]

FIG. 1 is a configuration diagram of main parts of an example of a two-spindle facing lathe to which the present invention is applied.

FIG. 2 is a side view showing a turret slide structure according to the present invention.

FIG. 3 shows a mounting relationship between an X-axis direction feed base and a tool rest.

FIG. 4 shows an example of a tool post slide structure in a conventional machine tool.

FIG. 5 shows a structural example of a conventional two-spindle facing lathe.

[Explanation of symbols]

1L, 1R Spindle head 2L, 2R Spindle chuck part 3L, 3R Spindle motor 4 Turret tool post 5 Turret tool 6 Tool post 6a Tool post feed screw shaft drive motor 6b Feed screw shaft 7 Turret tool 8 X axis direction feed table 8a X axis Direction feed table feed screw shaft drive motor 8b X axis direction feed nut part 9 Y axis direction feed table 9a Y axis direction feed table feed screw shaft drive motor 9b Y axis direction feed table guide block 10 B axis rotation control device 11, 12 Headstock guide rails 13 and 14 Turret tool post guide rails 15 and 16 Z axis direction tool post guide rail 17 X axis direction feed table side guide rail 18 Y axis direction feed table side guide block 19 Tool post side movable guide rail 20 X-axis direction Feed block side fixed guide block 30 Bed upper surface A Bed upper surface and spindle center Distance B Distance between blade and center of spindle

Claims (4)

[Claims] 1. A slide structure for a tool post of a machine tool, wherein a Y-axis feed bar is provided with an X-axis feed block capable of controlling Y-axis slide movement, and a fixed guide block is provided on the X-axis feed block side. And a nut portion, and a movable guide rail and a feed screw shaft are provided on the tool post side, and a tool post slide structure for a machine tool. 2. A tool post slide structure for a machine tool according to claim 1, wherein the tool post is provided with a B-axis turning control device. 3. A main shaft is provided with two main shafts arranged opposite to each other on the same axis line, and a Y-axis feed bar is provided above the main shaft so as to control the slide movement in the Z-axis direction. Two main spindle facing lathes equipped with an X-axis feed table for slide movement control, a fixed guide block and nut part on the X-axis feed table, and a movable guide rail and feed screw shaft on the tool post side. . 4. The two-spindle facing lathe according to claim 3, wherein the tool rest is provided with a turning control device around the B-axis.