JPH06134603A - Lathe with y-axis function - Google Patents

Abstract

PURPOSE:To provide a lathe with Y-axis function which can be used usually as the lathe with Y-axis function, and in the case where it is turned into a specification having no Y-axis function, sharply increased in rigidity, and moreover embodies the common use of a turret carriage in both the above specifications. CONSTITUTION:In the lathe with Y-axis function, a X-axis feed base 16 is installed on the X-axis guide 18 of a bed 1, and a turret carriage 17 is installed on a Y-axis guide provided on the X-axis feed base 16, and in the state where the X-axis feed base 16 has been removed, the turret carriage 17 is changed in its posture so far as 90 deg., and thereby can be directly installed on the X-axis guide 18. A means for making centers mutually coincide is provided to make the turret center TO of the turret carriage 17 with a spindle center SO in the Y-axis direction under the condition of direct installation, and for example, composed of a guide forming member 19' to alter the installation height of the X-axis guide 18 to the bed 1. The turret carriage 17 is installed on the guide 18 in a common use guided section 17b even in the case where it is installed on either of the X-axis and the Y-axis guide.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lathe having a Y-axis function that allows a tool to be fed in an eccentric direction with respect to a spindle.

[0002]

2. Description of the Related Art Conventionally, in a turret lathe, due to a demand for composite machining, the turret has two axes X, in addition to a cutting direction (X axis direction) and a feeding direction (Z axis direction) with respect to a workpiece.
There is a type in which it is possible to move back and forth in the Y-axis direction perpendicular to Z so that machining can be performed at an eccentric position of the work. This type of lathe with Y-axis function is generally equipped with a Z-axis feed table, Y-axis
Axial feed and X-axis feeds are mounted in sequence to enable 3-axis feed. However, in this configuration, since the feed tables are stacked in three stages, there is a problem that the supporting rigidity of the turret cannot be sufficiently secured and the machining accuracy is insufficient.

In order to solve such a problem, as shown in FIG. 6, the headstock 51 can be moved back and forth in the Z-axis direction, and the turret 52 can be moved only in the two X- and Y-axis directions. It is proposed that the number of stacked stages of the table is reduced. That is, the Y-axis feed table 53 is installed on the bed 50, and the X-axis feed table 54, which is a turret carriage equipped with the turret 52, is mounted thereon. According to this, since the number of stacking stages of the feed tables 53 and 54 is two, the rigidity can be improved.

Further, in this two-stage lathe, when the Y-axis function is unnecessary, the Y-axis guide 55 can be removed to fix the Y-axis feed table 53 to the bed 50 to further improve the rigidity. Has been. The upper surface of the bed 50 is inclined for the purpose of facilitating the discharge of chips.

[0005]

However, in this way, Y
Even if the Y-axis feed table 53 is fixed to the bed 50 when the axis function is unnecessary, the Y-axis feed table 53 is left and the X-axis feed table 54 is placed on the Y-axis feed table 53.
The length of the members interposed up to the point is almost the same, and sufficient rigidity cannot be achieved. In the structure in which the X-axis feed table 54 is arranged on the Y-axis feed table 53, the Y-axis feed table 53 cannot be removed and the X-axis feed table 54 cannot be directly attached to the bed 50. It is difficult to improve the rigidity in the case of specifications without the Y-axis function.

An object of the present invention is to provide a lathe which can be used as a lathe with a Y-axis function normally, and can be greatly improved in rigidity when the specification without the Y-axis function is used, and in which a turret carriage can be shared by both specifications. Is to provide.

[0007]

A lathe according to the present invention has a Y-axis function in which an X-axis feed table is installed on an X-axis guide of a bed, and a turret carriage is installed on a Y-axis guide provided on the X-axis feed table. A lathe with the following structure. That is, the turret carriage can be directly installed on the X-axis guide by changing the posture of the turret carriage by 90 degrees in a state where the X-axis feed table is removed. Center matching means is provided for matching each. Whether the turret carriage is installed on the X-axis guide or the Y-axis guide, the turret carriage is installed on the guide in the shared guided portion. The center matching means is, for example, means for changing the installation height of the X-axis guide with respect to the bed, or when the turret carriage is directly installed on the X-axis guide without changing the height of the X-axis guide, the turret is centered on the spindle. The height dimension from the shared guided portion to the center of the turret may be set so that the centers coincide with each other.

[0008]

According to this construction, normally, the turret carriage is moved along the Y-axis guide so that the work held by the main shaft can be machined at the eccentric position. If the Y-axis function is not needed, remove the X-axis feed and place the turret carriage directly on the bed's X-axis guide. By removing the X-axis feed table in this way, the length of the member interposed between the bed and the turret is shortened, and the rigidity is greatly improved. Further, the turret carriage is shared by both specifications with and without the Y-axis function. When the turret carriage is directly installed on the X-axis guide, the turret carriage is installed by changing its posture by 90 degrees. However, the center matching means is provided so that the turret center is aligned with the main axis center and the Y axis direction. They match and can be processed without any problems.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. This lathe is a face-to-face two-axis two-turret lathe designed to perform double-sided machining of a workpiece. A fixed-side main spindle 2 and a movable-side main spindle 3 are provided on a bed 1 whose entire upper surface is inclined forward. It has two turrets 4 and 5 installed corresponding to the main shafts 2 and 3.

The fixed-side main shaft 2 is supported by a fixed head stock 6 which is integral with the bed 1, is provided parallel to the length direction of the bed 1, and is rotationally driven by a main shaft motor 7 via a belt. . The stationary main spindle 2 is configured so that a long bar work W can be inserted from the rear end side thereof, and is equipped with a chuck cylinder 8 for opening and closing the main spindle chuck.

The movable main shaft 3 is supported on a rail 9 of the bed 1 on a movable head stock 10 which can move back and forth concentrically with the fixed main shaft 2, and faces the fixed main shaft 2 in the axial direction (Z axis). Direction). The movable head stock 10 is equipped with a spindle motor 11 that drives the movable spindle 3 by a belt, and a chuck cylinder 12 is provided at the rear of the movable spindle 3.

The turret 4 arranged in parallel with the fixed-side main shaft 2 is supported on the bed 1 via a Z-axis feed base 13 and an X-axis feed base 14, and the Z-axis feed base 13 is provided on the bed 1. It moves back and forth on the shaft guide 15 in a direction parallel to the main shaft 2 (Z-axis direction). The X-axis feed base 14 is installed on the X-axis guide 13a provided on the Z-axis feed base 13 so as to be able to move back and forth in the bed inclination direction (X-axis direction) orthogonal to the main shaft 2, and is a tool mounting portion of the turret 4. The indexing drive mechanism (not shown) is incorporated.

The turret 5 corresponding to the movable side spindle 3 has an X-axis feed base 16 and a turret carriage 1 on the bed 1.
It is supported through 7. The X-axis feed base 16 is installed on an X-axis guide 18 provided on the bed 1 via a guide forming member 19 so as to be movable back and forth in a bed inclination direction (X-axis direction) orthogonal to the main shaft 3. The guide forming member 19 is detachably attached to the upper surface of the bed 1 with a bolt or the like. The turret carriage 17 is a Y-axis guide 16 of the X-axis feed base 16.
It can be moved up and down in the direction perpendicular to the bed upper surface (Y-axis direction) along a and has a built-in indexing mechanism (not shown) for the turret 5.

The above-mentioned X-axis guide 18 and Y-axis guide 16a
Is a rail with grooves having rolling element engaging grooves (not shown) on both side surfaces, and the X-axis feed base 16 and the turret carriage 17 are respectively provided with an X-axis guide 18 and a Y-axis guide 16
The linear motion ball bearings 16b and 17b (Fig. 2,
It is movably engaged in FIG. The linear motion ball bearing 17b of the turret carriage 17 includes a Y-axis guide 16a and an X-axis guide 16a.
It serves as a shared guided portion that can be installed in any of the shaft guides 18. The other rails 9 and the guides 15 and 13a are also
Similarly, it consists of a grooved rail, and guides through a linear ball bearing. Note that each guide may be sliding guide.

As shown in FIG. 5A, the X-axis feed table 16
Of the ball screw 20 installed on the guide forming member 19
The X-axis servo motor 21 is used to feed the turret carriage 17, and the ball screw 22 and the Y-axis servo motor 23 installed on the X-axis feed base 16 are used to feed the turret carriage 17. 20
Reference characters a and 22a denote ball nuts that are respectively installed on the X-axis feed base 16 and the turret carriage 17 and screwed into the ball screws 20 and 22.

The operation and action of the above configuration will be described. The work held by the fixed-side spindle 2 is processed by the tool of the turret 4, and the work held by the movable-side spindle 3 is processed by the tool of the turret 5. On the movable side spindle 3, tool feeding in the work axis direction is performed by advancing and retracting the movable head stock 10, and machining by a rotating tool (not shown) or the like is performed at a position eccentric from the work axis by moving the turret carriage 17 up and down. You can do it. When performing double-sided processing, the fixed side spindle 2
Then, the work whose one side has been machined is moved to the movable side spindle 3 by advancing the movable side spindle 3, and the remaining one side is machined. The chips generated during these processes slide down on the inclined upper surface of the bed 1 and are collected in a chip receiver (not shown).

When the Y-axis function of the turret 5 arranged side by side on the movable side spindle 3 is unnecessary, the X-axis feed base 16 of FIG. 5A is removed and the bed 1 is placed on the bed 1 as shown in FIG. 5B. The turret carriage 17 is installed on the X-axis guide 18 of the guide forming member 19 '. In this case, the turret carriage 17 functions as an X-axis feed table. The guide forming member 19 'is
Guide forming member 1 when the X-axis feed base 16 of FIG.
It is attached to the bed 1 in exchange for 9, and the center TO of the turret 5 and the axis SO of the main shaft 3 are at the same level in the Y-axis direction by making the thickness slightly thicker than the guide forming member 19. Is done. That is, in this embodiment, the guide forming member 19 'serves as the center matching means. The X-axis guide 18 and the ball screw 20 of the guide forming member 19 'shown in FIG. 9B are of the same type as those of the guide forming member 19 shown in FIG.

As described above, when the Y-axis function is unnecessary, X
Since the turret carriage 16 is installed on the bed 1 by removing the shaft feed base 16, the length of the member interposed from the bed 1 to the turret 5 which is the tool supporting portion is shortened, and the rigidity is greatly improved. Therefore, a large cutting load can be endured, and the processing accuracy is improved. Moreover, Y
The turret carriage 17 can be commonly used for both specifications with and without a shaft, and replacement parts can be minimized.

In the above embodiment, the guide forming members 19 and 1 are used depending on whether the X-axis feed base 16 is installed or removed.
9'is exchanged, but the height H from the direct acting ball bearing 17b, which is the shared guided portion of the turret carriage 17, to the turret center TO is appropriately set according to the spindle center SO The turret carriage 17 is guided to the forming member 19 without replacing the forming member 19.
Alternatively, the turret center TO and the spindle center SO may be installed at the same height. In that case, the guide forming member 1
X is directly attached to bed 1 without forming 9 separately from bed 2.
The shaft guide 18 may be formed. Further, although the above embodiment has been described for the case of being applied to the facing type two-axis lathe, the present invention can also be applied to a single-axis lathe with a Y-axis function.

[0020]

The lathe with the Y-axis function of the present invention is a lathe in which the X-axis feed table is installed on the X-axis guide of the bed, and the turret carriage is installed on the Y-axis guide provided on the X-axis feed table. The turret carriage can be installed directly on the X-axis guide by changing the posture of the turret carriage by 90 degrees with the X-axis feed table removed, and the turret center of the turret carriage and the Y-axis direction can be set in this direct installation state. Since the center matching means is provided to match the above, the rigidity can be greatly improved in the Y-axis-less specification, and the turret carriage can be shared in both the specifications with and without the Y-axis function.

[Brief description of drawings]

FIG. 1 is a perspective view of a lathe according to an embodiment of the present invention.

FIG. 2 is a layout view of each lathe component viewed perpendicularly to the bed.

FIG. 3 is a front view in which a part of the lathe component is looked up in a tilt direction.

FIG. 4 is a cutaway side view of the lathe cut along the fixed-side main shaft.

FIG. 5A is a side view of the lathe, and FIG. 5B is a partial side view of a state in which the Y-axis function is absent.

FIG. 6 is a side view of a conventional example.

[Explanation of symbols]

1 ... Bed, 2 ... Fixed side spindle, 3 ... Movable side spindle, 4, 5
... Turret, 10 ... Movable head stock, 16 ... X-axis feed table, 16a ... Y-axis guide, 17 ... Turret carriage,
17b ... Direct acting ball bearing (shared guided portion), 18 ... X-axis guide, 19 ... Guide forming member, 19 '... Guide forming member (center matching means)

Claims (1)

[Claims] 1. An X-axis feed base is installed on the X-axis guide of the bed, and a turret carriage is installed on the Y-axis guide provided on the X-axis feed base at a common guided part, and the X-axis feed base is installed. The turret carriage can be installed in the shared guided portion directly on the X-axis guide by changing the posture of the turret carriage by 90 degrees in the removed state. In this direct installation state, the turret center of the turret carriage is aligned with the main shaft center in the Y-axis direction. A lathe with a Y-axis function that is equipped with center matching means.