JPH039954Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a tool post drive device for a movable spindle type lathe, and particularly relates to a numerically controlled tool post drive device for a lathe.

The conventional general structure of a blade drive device for a moving spindle lathe is that several tool slides are arranged radially on a tool stand, and a turret is attached to the tool slide, which is connected to a feed mechanism such as a ball screw. A configuration in which the feed is controlled in the radial direction using a tool stand, and a technique in which a single tool slide is provided on a tool stand and a turret is mounted on the tool slide to control the feed in the radial direction are known.

However, in both cases, the blade repeatedly moves forward and backward only toward the center of the workpiece.

In contrast to these known techniques, the present invention provides another tool slide perpendicular to these tool slides, and connects this tool slide with a piston.
The aim is to make it possible to select multiple radial drive positions for the cutter by moving it using a cylinder mechanism, thereby significantly improving the performance of the machine.

The features of the present invention will be explained below using drawings of embodiments.

FIG. 1 is a front view of a tool stand of a movable spindle type lathe in which a cutter drive device according to the present invention is implemented.

A tool stand 2 attached to a bed 1 is provided with two sets of tool slides that can slide orthogonally to each other. The first tool slide consists of a base 3 and a slider 4, and is slidable in the radial direction of the work W by means of a roller guide (not shown), etc., and an indexable turret 5 is mounted on the slider 4. There is.

The second tool slide forms a slide mechanism with a base 6 fixed to the tool stand 2 and a roller guide 7 (see Figure 2) attached to the lower part of the base 3, and is perpendicular to the moving direction of the slider 4. The entire first tool slide is movable in the vertical direction of the drawing.

The base 3 of the first tool slide is connected to a piston/cylinder mechanism 8 and can be driven, and the slider 4 is driven by the rotational force of a servo motor 9 with a configuration to be described later.

Note that 10 in the figure is a guide bushing mechanism that supports the workpiece W in the radial direction.

Next, FIG. 2 is a cross-sectional view taken along the cross-sectional line ~ in FIG. 1.

Inside the tool stand 2, a drive member 11 that can slide in the same direction as the slider 4 is supported by a guide (not shown), and a part of the slider 4 on which the turret 5 is mounted extends inside the tool stand 2, and is driven by a spring (not shown). The adjustment screw 12 is pulled in the opposite direction to the workpiece W and is screwed into the drive member 11.
are oppressively faced.

A feed screw 13 is screwed into the drive member 11, and the feed screw 13 is rotatably supported by a bearing 15 in a bracket 14 fixed to the tool stand 2, and one end of the feed screw 13 is connected to a coupling 16 in the bracket 14. It is connected to the servo motor 9 by.

Note that 17 in the figure is a main shaft that grips a workpiece and slides in the axial direction.

FIG. 3 is a detailed cross-sectional view of the piston-cylinder mechanism 8.

A member 19 is fixed to the base 3 by bolts 18, and a piston rod 20 is screwed into the threaded portion at the center of the member 19, and a first cylinder 21 includes a partition wall 20a of the piston rod 20 on the outside thereof. A lid 22 and a lid 23 seal on the left side and the right side, respectively, so that the piston rod 20 is slidable relative to the first cylinder 21.

The outer periphery of the first cylinder 21 further has a piston shape, and the right end partition wall 21a is enclosed in a second cylinder 25 that is fixed to the tool stand 2 with bolts 24.
is sealed on the left side by a lid 26 and on the right side by a lid 27, so that the first cylinder 21
is configured to be slidable with respect to the second cylinder 25.

In addition, in the present invention, the stroke amount by which the piston rod 20 can slide in the first cylinder 21 and the stroke amount by which the first cylinder 21 can slide in the second cylinder 25 are set to different values. It consists of:

The piston rod 20 has two separate oil holes 28 and 29 from both ends, and a partition wall 20 in the center.
It opens on the outer periphery near a, and the above-mentioned member 19
The hydraulic fitting 30 attached to the piston rod 20 is connected to the cylinder chamber on the left side of the partition wall 20a of the first cylinder 21 through the oil hole 28, and the fitting 31 attached to the right end of the piston rod 20 is connected to the partition wall 2 through the oil hole 29.
It is electrically connected to the cylinder chamber on the right side of 0a.

On the other hand, the metal fitting 32 attached to the lid 26 that seals the second cylinder 25 is placed in the cylinder chamber on the left side of the partition wall 21a of the second cylinder 25, and the metal fitting 33 attached to the lid 27 is placed in the cylinder chamber on the right side of the partition wall 21a. It is electrically conductive.

The structure of the present application is such that this piston/cylinder mechanism is connected to a hydraulic system (not shown) and subjected to sequence control.

In the case of the embodiment of the present application, the first cylinder 21
A threaded portion is formed on the left end of the outer periphery of the adjusting nut 3.
4 and 35 are screwed together, and the adjusting nut 34 is connected to the left cylinder chamber of the first cylinder 21, that is, when the hydraulic pressure is applied to the metal fitting 30, the piston rod 20
It is possible to adjust the position of the adjusting nut 35 when it comes to the lid 23 side, and the adjusting nut 35 is placed in the cylinder chamber on the left side of the second cylinder 25, that is, when the hydraulic pressure is applied to the metal fitting 32, the position of the first cylinder 21 is adjusted. It is possible to adjust the position when it comes to the lid 27 side.

The above is the configuration of the embodiment of the present application, and with these configurations, the slider 4 on which the tool post is mounted can feed the servo motor 9 not only on the line toward the center of the spindle, but also at up to four locations including this. It is now possible to select up to.

Next, FIG. 4 is an embodiment illustrating the effects of the present invention.

FIG. 4a shows the present invention applied to a turret tool rest, and is an embodiment of a horizontal hole drilling device using a cross drill. Conventionally, it has been easy to perform horizontal hole drilling toward the axis of the workpiece, but drilling at a position offset from the axis requires a special holder. However, according to the present application, this can be easily done with one holder, and if the hole diameter is the same, it is possible to open two or three holes as shown in the figure.

In addition, by attaching a tool such as an end mill to the horizontal hole drilling device as shown in b, it is possible to perform flat cutting, and by attaching a T-shaped slotter as shown in c, it is also possible to perform grooving. This results in the effect that one holder can be used for extremely many purposes.

Also, in addition to the turret tool post, as shown in Fig. 4 (d), prepare a holder with two bits attached for normal turning work, and make sure that each is selected on a line facing the center of the workpiece. It is also possible to increase the number of cutting tools, which has the advantage of being able to handle processing of complex products.

Incidentally, in the embodiment of the present application, the drive member 11 is provided to fix the servo motor 9 to the tool stand 2, but there is no need to be limited to the embodiment. You may.

In this way, in the present invention, two tool slides that can slide on mutually orthogonal lines are provided on top of each other on a tool stand having a plane perpendicular to the spindle axis, and the first tool slide is connected to the feed screw. Connected so that they can move forward and backward in the radial direction of the main shaft using a feed mechanism such as a servo motor,
The piston rod attached to the second tool slide is enclosed in the first cylinder with the partition wall between them, and the outer periphery of the first cylinder is shaped like a piston, and the partition wall is connected to the second cylinder fixed to the tool stand. The stroke amount by the first cylinder and the stroke amount by the second cylinder are different, and the feeding position in the radial direction of the tool rest such as a turret mounted on the first tool slide can be adjusted to up to four positions. I made it possible to select up to
This makes it possible to greatly expand the processing range of lathes, making it possible to greatly contribute to industry.

[Brief explanation of the drawing]

FIG. 1 is a front view of a tool stand for a movable spindle type lathe equipped with a cutter drive device according to the present invention. FIG. 2 is a cross-sectional view taken along the cross-sectional line ~ in FIG. 1. FIG. 3 is a detailed cross-sectional view of the piston-cylinder mechanism according to the present invention. FIG. 4 is an embodiment illustrating the effects of the present invention. 2...Tool stand, 3...Base, 4...
Slider, 5...Turret, 6...Base, 8...
... Piston cylinder mechanism, 9 ... Servo motor, 11 ... Drive member, 13 ... Feed screw, 20
...Piston rod, 20a...Bulkhead, 21...
First cylinder, 21a... Partition wall, 22, 23...
...Lid, 25...Second cylinder, 26, 27...
Lid, 28, 29...oil hole, 30-33...hydraulic fittings, W...work.

Claims (1)

[Scope of utility model registration request] On a tool stand having a plane perpendicular to the spindle axis, two tool slides that can slide on lines perpendicular to each other are provided overlapping each other,
The first tool slide is connected to the main shaft by a feed mechanism such as a feed screw and a servo motor so that it can move forward and backward in the radial direction of the main shaft. The outer wall of the first cylinder is in the shape of a piston, and the partition wall thereof is contained in a second cylinder fixed to the tool stand, and the stroke amount by the first cylinder and the stroke by the second cylinder are the same. with different amounts,
A moving spindle lathe, characterized in that it is possible to select up to four radial feeding positions of a tool post such as a turret mounted on a first tool slide.