JP3218481B2 - Lathe with Y-axis function - Google Patents

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 for enabling a tool to be fed eccentrically with respect to a main shaft.

[0002]

2. Description of the Related Art Conventionally, in a turret lathe, due to a demand for complex machining, in addition to a cutting direction (X-axis direction) and a feeding direction (Z-axis direction) of a turret, both axes X,
In some cases, the workpiece can be moved back and forth in a Y-axis direction perpendicular to Z so that machining can be performed at an eccentric position of a work. This type of lathe with Y-axis function is generally equipped with a Z-axis
An axis feed base and an X-axis feed base are sequentially mounted to enable three-axis feed. However, in this configuration, since the feed bases are stacked in three stages, there is a problem that sufficient stiffness for supporting the turret cannot be ensured and machining accuracy is lacking.

As a solution to such a problem, as shown in FIG. 6, a head stock 51 can be moved forward and backward in the Z-axis direction, and the turret 52 is moved only in the X- and Y-axis directions. A device in which the number of stacked stages is reduced has been proposed. That is, a Y-axis feed stand 53 is installed on a bed 50, and an X-axis feed stand 54 equipped with a turret 52 is mounted thereon. According to this, the feed stands 53, 54
Since the number of overlapping steps is two, the rigidity is improved.

In the two-stage lathe, when the Y-axis function is not required, the Y-axis guide 55 can be removed to fix the Y-axis feed base 53 to the bed 50 to further improve the rigidity. Have been. The reason why the upper surface of the bed 50 is inclined is to make it easier for chips to be discharged.

[0005]

However, as described above, Y
Even when the Y-axis feed base 53 is fixed to the bed 50 when the axis function is not required, the Y-axis feed base 53 is left and the X-axis feed base 54 is placed thereon, so that the turret 52
The length of the intervening member is almost the same, and sufficient rigidity cannot be improved. In the structure in which the X-axis feed base 54 is arranged on the Y-axis feed base 53, the Y-axis feed base 53 cannot be removed and the X-axis feed base 54 cannot be directly attached to the bed 50. It is difficult to improve the rigidity in the case of the specification 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 and which can greatly improve the rigidity when a specification without a Y-axis function is used. It is an object of the invention of claim 2 to enable the turrets on both sides to be supported with the same high rigidity in the case of the specification without the Y-axis function in the opposed two-axis lathe.

[0007]

A lathe with a Y-axis function according to the present invention is provided with a bed having an upper surface inclined with respect to a horizontal plane,
A headstock is provided on the inclined upper surface, a horizontal main shaft parallel to the upper surface of the bed is supported on the headstock, and the headstock on the upper surface of the bed in a direction orthogonal to the main axis direction Z is provided on the bed. vignetting bed X-axis feed bar can be moved in the tilt direction X locations provided with, this X
The main shaft direction Z and the bed inclination direction X
And a Y-axis feed base capable of moving back and forth in a direction Y perpendicular to the main body. The Y-axis feed base is provided with a tool mounting portion. The means for supporting the X-axis feed base on the bed so as to be able to advance and retreat in the bed inclination direction X includes an X-axis guide provided on the bed, and a guided guide provided on the X-axis feed base and guided by the X-axis guide. Department. The means for supporting the Y-axis feed base so as to be able to advance and retreat in the vertical direction Y on the X-axis feed base includes a Y-axis guide provided on the X-axis feed base, and a Y-axis guide provided on the Y-axis feed base. It is a guided part guided by guidance. The guided portion provided on the Y-axis feed base is guided by the X-axis guide provided on the bed when the X-axis feed base is removed from the bed and the Y-axis feed base is disposed on the bed. Shall be The tool mounting portion is provided in the main axis direction Z.
The turret can be turned in a plane perpendicular to the turret.

According to a second aspect of the present invention, there is provided a lathe with a Y-axis function.
And a feed base for supporting a turret juxtaposed to the other main shaft so as to be able to advance and retreat in the X and Y two-axis directions. The headstock supporting the other main shaft can advance and retreat in the Z-axis direction. For the other turret, a Y-axis feed base is installed on the X-axis feed base in the same manner as in the first aspect.

[0009]

According to this configuration, the work held by the spindle can be processed to the eccentric position by the movement of the Y-axis feed base. If the Y-axis function is not required, remove the X-axis slide and install the Y-axis slide directly on the bed so that it can advance and retreat. By removing the X-axis feed base in this manner, the length of the member interposed from the bed to the tool support portion is reduced, and the rigidity is greatly improved.

In the case of the second aspect, the headstock of the other main spindle moves forward and backward, so that Z
The feed in the axial direction and the transfer of the work between both spindles are also used. When the Y-axis function of the tool for the other main spindle is unnecessary, a large improvement in rigidity can be achieved by removing the X-axis feed base as in the case of claim 1, and the supporting rigidity of the turrets of both main spindles can be increased to the same high rigidity. it can.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. This lathe is a facing two-axis two-turret lathe for performing double-sided processing of a work. A fixed-side main spindle 2, a movable-side main spindle 3, and a It has two turrets 4 and 5 installed corresponding to the spindles 2 and 3.

The fixed main spindle 2 is supported by a fixed headstock 6 integral with the bed 1 and is provided in parallel with the length direction of the bed 1 and is rotated by a main motor 7 via a belt. . The fixed main spindle 2 is formed so that a long bar work W can be inserted from the rear end side, and is equipped with a chuck cylinder 8 for opening and closing the main spindle chuck.

The movable main shaft 3 is supported concentrically with the fixed main shaft 2 on a movable headstock 10 which can move forward and backward on the rail 9 of the bed 1, and faces the fixed main shaft 2 in the axial direction (Z axis). Direction). A spindle motor 11 for driving the movable spindle 3 by a belt is mounted on the movable headstock 10, and a chuck cylinder 12 is provided at the rear of the movable spindle 3.

A turret 4 juxtaposed to the fixed main spindle 2 is supported on the bed 1 via a Z-axis feed bar 13 and an X-axis feed bar 14. It advances and retreats 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 an X-axis guide 13 a provided on the Z-axis feed base 13 so as to be able to advance and retreat in a bed inclination direction (X-axis direction) orthogonal to the main shaft 2. (Not shown).

The turret 5 corresponding to the movable spindle 3 is supported on the bed 1 via an X-axis feed base 16 and a Y-axis feed base 17. The X-axis feed base 16 is installed so as to be able to advance and retreat on an X-axis guide 18 provided on the bed 1 via a guide forming member 19 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. Y-axis feed base 1
Numeral 7 can move up and down in a direction perpendicular to the upper surface of the bed (Y-axis direction) along the Y-axis guide 16a of the X-axis feed base 16, and incorporates a turret 5 indexing mechanism (not shown).

The aforementioned X-axis guide 18 and Y-axis guide 16a
Consists of grooved rails each having rolling element engaging grooves (not shown) on both side surfaces, and the X-axis feed base 16 and the Y-axis feed base 17 move directly to the X-axis guide 18 and the Y-axis guide 16a, respectively. The ball bearings 16b and 17b (FIGS. 2 and 5A) movably engage with each other. Other rails 9 and guides 15, 13a
Similarly, it is formed of a grooved rail and guides through a linear motion ball bearing. Each guide may be a slide guide.

As shown in FIG. 5A, the X-axis feed base 16
Of the ball screw 20 installed on the guide forming member 19
And the X-axis servo motor 21 and the Y-axis feed base 17
Is performed by a ball screw 22 and a Y-axis servomotor 23 installed on the X-axis feed base 16. 20a, 22a
Denotes ball nuts installed on the X-axis feed base 16 and the Y-axis feed base 17, respectively, and screwed into the ball screws 20, 22.

The operation and operation of the above configuration will be described. The work held by the fixed main spindle 2 is processed by the tool of the turret 4, and the work held by the movable main spindle 3 is processed by the tool of the turret 5. In the movable-side spindle 3, the tool feed in the direction of the workpiece axis is performed by moving the movable headstock 10 forward and backward, and the rotary tool (not shown) or the like is moved to a position eccentric from the workpiece axis by elevating the Y-axis feed base 17. Processing can be performed. In the case of performing double-sided machining, the work on which one-side machining has been completed on the fixed-side spindle 2 is replaced with the movable-side spindle 3 by moving the movable-side spindle 3, and the remaining one-side machining is performed. The chips generated during these processes slide down 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 juxtaposed to the movable main spindle 3 is unnecessary, the X-axis feed base 16 shown in FIG. 5A is removed and the turret 5 is placed on the bed 1 as shown in FIG. The Y-axis feed base 17 is set on the X-axis guide 18 of the guide forming member 19 '.
In this case, the Y-axis slide 17 functions as an X-axis slide. The guide forming member 19 ′ is attached to the bed 1 in place of the guide forming member 19 when the X-axis feed stand 16 is installed in FIG. 9A, and is slightly thicker than the guide forming member 19. Thus, the axis of the turret 5 and the axis of the main shaft 3 are at the same level in the Y-axis direction. X-axis guide 18 of guide forming member 19 'in FIG.
The ball screw 20 and the guide forming member 1 shown in FIG.
The same type as that of No. 9 is used.

As described above, when the Y-axis function is unnecessary, X
Since the Y-axis feed base 16 is installed on the bed 1 with the shaft feed base 16 removed, the length of the member interposed from the bed 1 to the turret 5 which is a tool supporting portion is shortened, and the rigidity is greatly improved. Therefore, it can withstand a large cutting load and the processing accuracy is improved. Also, like this, X
In a state where the axis feed base 16 is removed and the Y-axis feed base 17 is directly installed on the bed 1, the support stiffness of the turret 5 is increased, so that the support stiffness of the left and right turrets 4, 5 is substantially the same as the high stiffness. can do.

In the above-described embodiment, the guide forming members 19 and 1 are provided depending on whether the X-axis feed base 16 is installed or removed.
The guide forming member 19 is replaced with the guide forming member 19 by appropriately designing the dimensional relationship of the Y-axis feed base 17 and the like.
Of the Y-axis feed base 17 without exchanging the
9, the turret 5 and the main shaft 3 may have the same height in the Y-axis direction. In that case, the guide forming member 1
9 is formed directly on bed 1 without being formed separately from bed 2.
The shaft guide 18 may be formed. Although the above embodiment has been described with reference to the case where the present invention is applied to a facing two-axis lathe, the present invention can be applied to a single-axis lathe with a Y-axis function.

[0022]

According to the lathe with the Y-axis function of the present invention, since the Y-axis slide is provided on the X-axis slide, the X-axis slide is removed when the Y-axis function is not required, and the Y-axis slide is placed on the bed. It can be installed so that it can go directly into and out. Therefore, when the specification without the Y-axis function is adopted, a great improvement in rigidity can be achieved.

The lathe with a Y-axis function according to the second aspect is obtained by applying the configuration of the first aspect to an opposed two-axis lathe. By removing the shaft feeder, a large improvement in rigidity can be achieved, and the stiffness of the turrets of both spindles can be made high.

[Brief description of the 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 perpendicular to the bed.

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

FIG. 4 is a cutaway side view of the lathe broken at a fixed spindle.

FIG. 5A is a side view of the lathe, and FIG. 5B is a partial side view of a state without a Y-axis function.

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

[Explanation of symbols]

1 bed, 2 fixed spindle, 3 movable spindle, 4, 5
... Turret, 10 ... Movable headstock, 16 ... X-axis slide, 16a ... Y-axis guide, 17 ... Y-axis slide, 18 ... X
Shaft guide, 19, 19 '... guide forming member

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B23B 3/06 B23B 3/16 B23B 3/30 B23B 21/00

Claims (2)

(57) [Claims] 1. A bed having an upper surface inclined with respect to a horizontal plane, a headstock provided on the inclined upper surface, and a horizontal main shaft parallel to the upper surface of the bed supported on the headstock. a direction orthogonal to the direction Z, the X-axis feed bar can be moved in the bed inclination direction X of the place where it has been kicked set headstock bed top is provided, on the X-axis feed table on the spindle direction Z and the the possible Y-axis feed bar back and forth is provided in the perpendicular direction Y with respect to the bed inclination direction X, the Engineering tool mounting portion in the Y-axis feed table provided, advance and retreat in the bed inclination direction X of the X-axis feed table on the bed The means for supporting as possible includes an X-axis guide provided on the bed and a guided portion provided on the X-axis feed base and guided by the X-axis guide, and the Y-axis feed base is connected to the X-axis feed base. On the vertical direction Y
The means for supporting the robot so as to be able to advance and retreat is composed of a Y-axis guide provided on the X-axis feed base, and a guided portion provided on the Y-axis feed base and guided by the Y-axis guide. The guided portion provided on the bed is guided by the X-axis guide provided on the bed when the X-axis feed base is removed from the bed and the Y-axis feed base is arranged on the bed. A lathe with a Y-axis function, wherein the tool mounting portion is a turret that can be turned in a plane perpendicular to the main axis direction Z. 2. A feed base for providing two main shafts facing each other on the same axis, supporting a turret juxtaposed to one main shaft so as to be able to advance and retreat in two axial directions of X and Z, and providing the other main shaft with 2. A Y-axis function according to claim 1, further comprising a feed base for supporting the turrets arranged side by side so as to be able to advance and retreat in two X- and Y-axis directions, and allowing the headstock supporting the other main shaft to be able to advance and retreat in the Z-axis direction. lathe.