JP2003089025A - Composite machining table and vertical lathe equipped with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To carry out planing in addition to original turning by using one vertical lathe. SOLUTION: A planer table 26, to which a linear axis, that is, Y-axis is added to feed a workpiece linearly for planing, is detachably mounted to an upper surface of a rotary table 12 for the vertical lathe that is rotated with the workpiece placed thereon for turning.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical lathe, and more particularly to a vertical lathe capable of turning and planing with a single vertical lathe.

[0002]

2. Description of the Related Art A vertical lathe is provided with a rotary table on which a workpiece is placed, and a tool rest, on which a tool is attached, moves vertically and horizontally to perform turning on a workpiece that rotates together with the rotary table. In recent years, the NC lathes and the precisions of the vertical lathes have been advanced, and ultra-precision machining of dies for optical mechanical parts such as lenses can be performed.

There are many types of lens molds that are processed on a vertical lathe. For example, a special lens called a Fresnel lens used as a condenser lens of a liquid crystal monitor is one of them. A large amount of special lenses such as the Fresnel lens can be processed at low cost because of the progress of the NC vertical lathe.

On the other hand, with the progress of computers and electronic equipment, the types of lenses and the like are also increasing. Taking the above-mentioned Fresnel lens as an example, in addition to the conventional disk-shaped Fresnel lens, a linear Fresnel lens having a semicylindrical shape. A new lens is born.

[0005]

In relation to machining on a lathe, a mold for a Fresnel lens can be machined by turning on a vertical lathe, but a mold for a linear Fresnel lens can be machined by planing. Will be needed. Since the conventional vertical lathe cannot perform planing, it cannot process the die for the linear Fresnel lens. Conventionally, although the same type of mold is processed, the types of processing are different, and therefore machines suitable for each type of processing must be individually equipped. Therefore, the installation area and equipment cost increase, and the processing cost cannot be reduced.

Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a vertical lathe capable of performing a planing process in addition to the original turning process using a single vertical lathe. To provide.

[0007]

In order to achieve the above object, a composite machining table according to the present invention is provided on a rotary table for a vertical lathe for placing a workpiece and rotating it for turning. It is characterized in that a planar table having a linear axis for linear feeding for planing is detachably mounted. A vertical lathe according to the present invention is characterized by including the combined machining table.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a combined machining table and a vertical lathe equipped with the same according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a side view showing a vertical lathe according to this embodiment, and FIG. 2 is a front view showing the vertical lathe. Reference numeral 10 indicates a bed,
Reference numeral 12 is a rotary table incorporated in the bed 10. The upper surface of the bed 10 has a column mounting surface 13 on a horizontal plane, and the column 14 is fixed to the mounting surface 13. A saddle guide 15 having a guide surface composed of a V groove is attached to the upper surface of the column 14.
The saddle 16 is slidably installed on the guide surface.

A tool rest 18 is supported on the saddle 16 via a ball screw feed mechanism (not shown). In the main body of the tool rest 18, four tool holders are provided symmetrically with respect to the rotation axis, and by controlling the rotation of the indexing motor 20, it is possible to index the position of the tool with a precision of 1 / 10,000. You can do it.

In the case of this vertical lathe, the tool rest 18 is attached to the saddle 1
The X axis is the axis that moves horizontally with 6, and 21 is the saddle 1.
6 is an X-axis servomotor that drives the ball screw feeding mechanism of No. 6. The Z axis is the axis that moves the tool rest 18 up and down.
Reference numeral 22 is a Z-axis servomotor that drives a ball screw feed mechanism that moves the tool rest 18 in the vertical direction. Turret 1
The axis for determining 8 is the B axis. In FIG. 2, 2
Reference numeral 3 is a drive device for driving the rotary table.

On the rotary table 12, a turning table 24 on which a workpiece to be turned is placed is horizontally arranged. Turning table 2 for normal turning
4 is at the top, the workpiece is fixed and it rotates on a horizontal plane. Inside the main body of the rotary table 12, a bearing that supports the rotating shaft of the turning table 24, a gear that transmits torque to the rotating shaft, and the like are incorporated, but these are different from the conventional rotary table. Since there is no place, illustration is omitted.

In the present invention, the turning table 24
A planar table 26 for planing is detachably attached to the upper surface of the. When the turning table 24 is divided into left and right regions with a line passing through the center thereof, the planar table 26 is arranged at a position close to one region, whereby the entire width of the planar table 26 is set to the tool rest 18. It can be covered by moving the X axis.

The planar table 26 includes a table base 28 fixed to the upper surface of the turning table 24,
Moving table 30 that moves on this table base 28
It is basically composed of and. V-grooves 31a and 31b forming a linear guide are formed on the upper surface of the table base 28, and the movable table 30 can be linearly moved by using the V-grooves 31a and 31b.

Next, FIG. 3 is a view showing a vertical section of the planar table 26. As shown in FIG. 3, the table base 28 is provided with a ball screw feeding mechanism for feeding the moving table 30. 32 is a ball screw. Both ends of the ball screw 32 are supported by bearings 33 and 34, and one end of the ball screw 32 has a Y-axis servomotor 35.
Is connected with. The ball nut 36 is fixed to the bottom surface of the moving table 30 and is screwed with the ball screw 32. Therefore, when the ball screw 32 is rotated by the Y-axis servomotor 35, the rotation is converted into thrust for sending the moving table 30 and transmitted through the ball nut 36.

The Y-axis servomotor 35 is connected to a servo driver of an NC device (not shown) of the vertical lathe, and in this embodiment, the axis for controlling the feed of the moving table 30 is the Y-axis. In this case, the axial direction of the ball screw 32 may change with the rotation of the rotary table 12, but when planing is performed, the axial direction of the ball screw 32 is orthogonal to both the X axis and the Z axis as shown in FIG. After determining the position of the rotary table 12 so that it is in the direction (the direction perpendicular to the paper surface of FIG. 1), the rotary table 12 is fixed by a clamp means (not shown), and the axial direction of the ball screw 32 and the Y which is a mechanical position control axis. I try to match the axes. And
The NC device of the vertical lathe has a total of 4 X-axis, Y-axis, Z-axis and B-axis
Numerical control can be performed simultaneously for the axes. The front and rear sides of the moving table 30 in the feed direction are covered with bellows covers 40 and 41 in order to protect the V grooves 31a and 31b which are guide surfaces.

FIG. 4 is a diagram showing a cross section of the planar table 26. As shown in FIG. 4, both the table base 28 and the moving table 30 have a structure that ensures rigidity and is lightweight. The left and right sides of the table base 28 are clamped by a required number of clamp members 46. In this case, the clamp member 46
The front end of the engaged portion 4 on the side of the table base 28.
8 and the clamp member 46 is fastened to the upper surface of the turning table 24 via the pedestal 47 with a bolt,
The planar table 26 can be easily fixed to the turning table 24. When removing the planar table 26, the bolts may be returned to remove the clamp member 46.

According to this embodiment, the turning table 2
By attaching the planer table 26 to No. 4, it is possible to carry out the planing work which cannot be performed by the conventional vertical lathe as follows.

As shown in FIG. 1, the planar table 26 is indexed so that the moving direction of the moving table 30 is orthogonal to the X-axis direction and the Z-axis direction, and is fixed by a table clamp device (not shown). Then, a work (not shown) is attached to the moving table 30. By executing the machining program for planing on the NC device, the tool rest 18 can be moved to the X-axis,
It is possible to perform desired planing on a workpiece in the same manner as a planing machine while feeding the moving table 30 while numerically controlling the Y axis and the B axis as well as numerically controlling the Y axis.

Of course, once the planar table 26 is removed, the workpiece can be attached to the turning table 24 and the original turning process of the vertical lathe can be performed.

[0020]

As is apparent from the above description, according to the present invention, it is possible to perform not only turning but also planing with a single vertical lathe. This eliminates the need to equip machines suitable for machining and planing, thereby reducing equipment costs and significantly reducing the machine installation area, thereby contributing to rationalization of machining equipment.

[Brief description of drawings]

FIG. 1 is a side view showing a vertical lathe according to an embodiment of the present invention.

FIG. 2 is a front view showing the same vertical lathe.

FIG. 3 is a vertical sectional view showing a planar table attached to a rotary table of a vertical lathe.

FIG. 4 is a transverse sectional view of the planar table.

[Explanation of symbols]

10 beds 12 rotary table 14 columns 16 saddle 18 Turret 24 Turning table 26 Planer table 28 table base 30 moving table 32 ball screw 36 ball nut

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kazu Kawazu             2068 Ooka, Numazu City, Shizuoka Prefecture Toshiba Machine Co., Ltd.             In the company F-term (reference) 3C045 BA02 BA40 CA30 EA02 EA04                 3C048 AA01 BC02 DD10 DD12 EE00

Claims (4)

[Claims] 1. A planar table having a linear axis for linearly feeding a workpiece on the upper surface of a rotary table for a vertical lathe, on which a workpiece is placed and rotated for turning. A composite processing table characterized by being placed as much as possible. 2. The planar table is removably fixed to the upper surface of the rotary table, has a base having a linear guide, and is slidably provided on the base along the linear guide to fix a workpiece. A combined machining table for a vertical lathe according to claim 1, further comprising: a movable table, a ball screw mechanism that gives a linear feed motion to the movable table, and a servomotor that drives the ball screw mechanism. . 3. A vertical lathe comprising the composite machining table according to claim 1. 4. The vertical movement of the tool post of the vertical lathe is the Z axis, the horizontal movement of the tool post is the X axis, and the index of the tool post is B.
An NC device for numerically controlling the axis is provided, and the NC device has a linear axis for controlling the feed of the planar table,
The vertical lathe according to claim 3, which is numerically controlled as a Y axis orthogonal to the X axis and the Z axis.