JP2540245Y2 - Beds for machine tools - Google Patents

Description

The present invention relates to a bed for a machine tool.

2. Description of the Related Art Recently, there has been a strong demand for lathes to be combined and integrated, and a lathe developed for this purpose is disclosed in Japanese Patent Application Laid-Open No. 62-224501. As shown in FIG. 2, Z-axis guides 101a and 101b for a headstock 102 and a tool post 103 are formed on a bed 101 having a cross-sectional shape bent as shown in FIG. It is provided so as to be able to travel in three directions of X, Y and Z.

Problems to be Solved by the Invention The lathe disclosed in Japanese Unexamined Patent Application Publication No.
Although it has all the functions of a combined machining lathe with a shaft, it has a problem that simultaneous cutting with two tools cannot be performed because only one tool post is used.・ Since the three axes of X are sequentially stacked, the rigidity of the tool post cannot be sufficiently secured, and there is a problem that the cutting ability is lacking.

The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to provide two Z-axis guides for a first turret for a headstock and for a second turret. And a bed structure that can be replaced with a standard lathe having no Y-axis function by removing at least the Y-axis guide as required and having the Y-axis guide attached. What you want to do.

Means for Solving the Problems In order to achieve the above object, a machine tool bed according to the present invention includes an upper first guide and a lower second guide in the Z-axis direction provided in parallel in the vertical direction on the front side. A Z-axis provided at a position on the rear side of the upper first guide and an X perpendicular to the Z-axis.
And a third guide provided in a direction perpendicular to the Z-axis on a rearwardly inclined surface that forms an angle with a plane including the axis.

The headstock or opposing headstock on the first guide, the first tool rest movable on the X axis on the second guide, and an angle with a plane containing the Z axis and the X axis perpendicular to the Z axis. A second guide movable on the rearward inclined surface in a direction perpendicular to the Z axis and movable in the X axis direction on a third guide.
The tool rests are provided so that they can be moved and positioned, and the workpiece held by the spindle chuck of the head stock or the opposing head stock can be simultaneously cut by two turning tools, and the Y-axis function of the second tool rest allows the misalignment position. It is possible to construct a lathe with a Y-axis or an opposing main spindle lathe with a Y-axis that can perform a milling process such as a boring process or a beveling process with a rotary tool.

Embodiment An embodiment will be described with reference to FIG.

A bed 2 is placed on a leg 1 installed on the floor, and two Z-axis guide mounting surfaces 2a and 2b are cut on the inclined surface on the front surface of the bed 2 in parallel and with a vertical step. The Z-axis and the Z-axis are located on the rear side of the upper mounting surface 2a on the rearwardly inclined surface.
A certain angle is formed on a plane including the X axis perpendicular to the axis. In this embodiment, a guide mounting surface 2c which is perpendicular to the Y axis and parallel to the Z axis is cut. Each of the mounting surfaces 2a to 2c has an inclination angle of 45 ° with respect to a horizontal plane in order to improve the flow of the chips, and the inside of the bed 2 has two cavities partitioned by ribs in the Z-axis direction, It has a simple structure with reduced weight and increased rigidity.

Z-axis guides 3 and 4 are fixed on the mounting surfaces 2a and 2b, and Y-axis guides 5 are fixed on the mounting surface 2c. A headstock 6 is mounted on the Z-axis guide 3 so as to be movable and positioned. . A spindle 8 is rotatably supported on the headstock 6 by a plurality of bearings (not shown), and a chuck 7 is fitted to a tip of the spindle 8.

On the other hand, a carriage 9 is mounted on the Z-axis guide 4 so as to be movable and positionable.
The tool rest 11 is mounted so as to be movable and positionable. The first turret 11 supports a first turret 12 that is rotatable and indexable about a rotation center axis in the Z-axis direction. The first turret 12 is provided with a turning tool mounting station and a rotary tool mounting provided on the outer periphery of the first turret. A turning tool T1 and a rotary tool T2 are detachably attached to the station.

Further, the moving table 13 is mounted on the Y-axis guide 5 so as to be movable and positionable, and the second tool rest 15 is mounted on the X-axis direction guide 14 fixed to the moving table 13 so as to be movable and positionable. The second turret 15 supports a second turret 16 which is rotatable and indexable about a center axis of rotation in the Z-axis direction. Turning tool T1 and rotating tool T2 at the mounting station
Are detachably attached.

 Next, the operation of the present embodiment will be described.

When the workpiece held by the spindle chuck 7 is simultaneously cut by the two turning tools T1 of the first turret 12 and the second turret 16, and the turning is completed, the second turret is completed.
15 turns and the rotary tool T2 is indexed to the cutting position. Then, the rotation of the main shaft 8 is stopped, and the outer peripheral surface of the workpiece is cut by the cutting feed of the second turret 16 in the X-axis direction and the cutting feed of the movable base 13 in the Y-axis direction.

In addition, the Y-axis guide 5 is removed and the moving base 13 is directly attached to the bed
By fixing it to 2c, it can be easily changed to a standard lathe without Y-axis function.

Also, the inclination angles of the mounting surfaces 2a and 2b can be set to an angle larger than 0 ° and smaller than 90 °, of course,
An inclination angle of about 30 ° to 60 ° is desirable as a general structure through which chips can easily flow.

Effects of the Invention Since the present invention is configured as described above, the following effects can be obtained.

Since the bed structure has two Z-axis guides provided in parallel with a vertical step and one Y-axis guide,
It has a headstock or an opposing headstock that can move in the axial direction, a first turret that can move in the X and Z directions, and a second turret that can move in the X and Y directions. A lathe with a Y-axis or a facing lathe with a Y-axis can be constructed smoothly and with a simple program.

In addition, since each of the guides is of a mounting type, machining of a slider-based part becomes easy and a bed structure can be simplified, a casting manufacturing time is shortened, a manufacturing cost is reduced, and a Y-axis guide is removed to remove a second blade. By enabling the table to move only in the X-axis, it is possible to easily change the specification of the bed to a standard lathe having no Y-axis function.

[Brief description of the drawings]

FIG. 1 is a side view of a lathe showing only the bed of the present embodiment in cross section, and FIG. 2 is a side view of a conventional lathe. 2. Bed, 2a to 2c Guide mounting surface, 3, 4 Z-axis guide, 5 Y-axis guide.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Kojiro Furukawa 1-32 Tsuji-machi, Kita-ku, Nagoya City, Aichi Prefecture Okuma Iron Works Co., Ltd. (56) References JP-A-62-68202 (JP, A) 1988-191530 (JP, A)

Claims (1)

(57) [Scope of request for utility model registration] An upper first guide and a lower second guide in the Z-axis direction provided in parallel in the vertical direction on the front side, and a Z-axis and a Z-axis provided at a rear side position of the upper first guide. X perpendicular to axis
And a third guide provided in a direction perpendicular to the Z-axis on a rearward inclined surface that forms an angle with a plane including the axis.