JPH0379202A - Double spindle lathe - Google Patents

Abstract

PURPOSE:To avoid deterioration in rigidity of a tool rest and problems in installation, structure and space for moving by making movement of the tool rest of a double spindle lathe enable in both the X and Y axes directions through supporting it with a two-layered slide surface and by supporting a headstock with a one-layered slide surface. CONSTITUTION:At least one headstock 8 of a lathe having two spindles 3 and 9 is attached in capable of moving in the Z-axis direction. And a tool rest 11 which works with a spindle 8 of this headstock 9 is made capable of moving only in both the directions of the X-axis and the Y-axis. In this case, when a slant type bed 1 having a main slide surface 15 which is inclined toward front is adopted, a movable carriage 13 is attached to a Y-axis slide surface 18 extended diagonally back down from a top side 16 of the bed 1, and the upper edge of this movable carriage 13 is extended diagonally back up so as to form an X-axis slide surface 19 for guiding the tool rest 11, a device can be constituted more compactly.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a lathe, particularly a two-spindle opposed lathe having two main spindles facing each other on the same axis, with the tool rest parallel to the sliding surface of the bed. This invention relates to a lathe that is movable in both vertical directions (X-axis direction) and vertical directions (Y-axis direction).

(Prior Art) In order to improve machining accuracy and machining efficiency, there is an increasing demand for performing all machining required for a workpiece on one machine tool. When attempting to machine a cylindrical workpiece 24 having a chamfered portion 25, an eccentric hole 26 in the direction perpendicular to the axis, etc. as shown in FIG. It is necessary to attach a rotary tool to a lathe equipped with a tool rest for machining. Here, the Y-axis direction is parallel to the main axis, the X-axis direction is parallel to the sliding surface of the bed, and the Z
The direction perpendicular to the axis, the Y-axis direction, is perpendicular to the sliding surface of the bed and intersects the Z-axis at right angles.

4 and 5 are diagrams showing conventional lathes with the above structure. The lathe in FIG. , an auxiliary movable base 28 that moves in the Y-axis direction along the side surface of the movable base is mounted, and a tool rest 11 that moves in the X-axis direction along the side surface of the auxiliary movable base is mounted, and the fifth The one in the figure shows a moving table 27 that is movable in the X-axis direction along the main slide surface 15.
, an auxiliary moving table 28 that moves in the X-axis direction along the top surface of the moving table, and a tool rest 11 that moves in the Y-axis direction along the front end surface of the auxiliary moving table. be. In addition, in Fig. 4.5, 1 is a bed, 8 is a headstock, 9 is a main shaft, 12 is a turret attached to the tool rest 11, 18 is a slide surface in the Y-axis direction, and 19 is a slide surface in the X-axis direction. .

(Problem to be Solved by the Invention) However, in the structure described above, since the tool rest 11 is supported via three layers of slide surfaces 15, 18, and 19 that are perpendicular to each other, the rigidity of the tool rest 11 is reduced. There were problems in that the cutting ability during turning processing was reduced, and that the moving table 27 or the auxiliary moving table 28 had an unstable structure that protruded high above the bed 1, making it difficult to secure space for its movement. .

This invention proposes a more compact and rational structure for a lathe in which the tool rest is movable in both the X-axis and Y-axis directions.

(Means for Solving the Problems) The present invention provides a lathe having two main spindles 3.9, in which at least one headstock 8 is mounted movably in the X-axis direction, and the main spindle 9 of this one headstock and The above problem is solved by adopting a configuration in which the cooperating tool rest 11 is movable only in both the X-axis direction and the Y-axis direction.

In this case, a slant type bed 1 having a main sliding surface inclined toward the front side is adopted, and a movable table 1 is attached to an X-axis direction sliding surface 18 extending obliquely downward from the top side 16 of the bed 1.
3 is attached, and the upper end of the movable table 13 is extended rearward and obliquely upward to form an X-axis sliding surface 19 for guiding the tool rest 11, thereby making it possible to configure the apparatus of the present invention more compactly.

(Function) Since the lathe of the present invention has the above structure, the tool rest 11 has two
Since it is supported only through the sliding surfaces 18 and 19 of the layers, it is possible to avoid a decrease in rigidity due to multi-layered sliding surfaces, and it is also easy to secure a movement space for the tool post 11. Since it is a two-spindle opposing type lathe, the first headstock 2 is fixed to the bed 1, and the first tool rest 5, which performs machining in cooperation with the first spindle, can be moved only in the X-axis and X-axis directions. By adopting the above-mentioned structure of the present invention on the second spindle side, a lathe is obtained which is capable of heavy turning on the first spindle side and also allows machining of the chamfer 25 and eccentric hole 26 on the second spindle side. It is possible to provide a lathe that has a large turning processing capacity and is also capable of multiple processing.

Further, with the structure using the slant type bed, the X-axis direction sliding surface 19 and the X-axis direction sliding surface 18 for the tool rest 11 can be formed easily in terms of space and strength, and the tool rest Coupled with the fact that 11 does not move in the X-axis direction, a compact and highly rigid device can be obtained.

(Embodiment) FIGS. 1 and 2 show an embodiment of the present invention. In the figure, 1 is a bed, 2 is a first headstock fixed to the bed 1, 3 is a first spindle, 4 is a spindle motor for the first spindle, and 5 is a spindle that performs processing in cooperation with the first spindle 3. 1 turret, 6
7 is a first turret, and 7 is a first movable table which supports the first tool rest 5 movably in the Z-axis and X-axis directions, and these are no different in structure from the conventional l-axis talent lathe.

8 shown by imaginary lines is a second headstock, 9 is a second spindle, 10 is a spindle motor for the second spindle, 11 is a second tool rest that performs machining in cooperation with the second spindle 9, and 12 is a second turret. , 13 is an inverted second movable base that supports the second tool rest 11 movably in the X-axis direction, and 14 is a slide base that supports the second movable base 13 movably in the Y-axis direction. It is.

The main slide surface 15 of the bed 1 is inclined toward the front at an angle of 45 degrees, and the main slide surface 1 on the first headstock 2 side is inclined toward the front side at an angle of 45 degrees.
5 is extended rearward with its slope, and the first
A first movable table 7 supporting the tool post 5 is mounted thereon.

On the other hand, on the second headstock 8 side, the main slide surface 15 of the bed 1 is approximately half the width of the first headstock side, and the back inclined surface 17 is diagonally downward from the top side 16 at a right angle to the main slide surface 15. It is growing to The second headstock 8 is slidably mounted on the half-width main slide surface 15 in the Z-axis direction, and a slide base 14 having a Y-axis slide surface 18 is fixed to the back inclined surface 17. . The second movable table 13 is mounted on a slide base 14 so as to be movable in the Y-axis direction, and its top part extends rearward and diagonally upward parallel to the main slide surface 15, and has an X-axis direction slide surface 19 formed on its upper surface. Second
The tool rest 11 is movably mounted on this X-axis sliding surface 19.

21 is a feed motor for the second tool rest 11, 22 is a feed motor for the second movable table 13, and 23 is a feed motor for the second headstock 8, which employs a feed structure using a well-known ball screw mechanism.

The workpiece 24 shown in FIG. 3 is processed in the apparatus having the above structure as follows.

The material is first gripped by the first spindle 3, and rough turning and finish turning of the portion other than the gripping portion are performed in cooperation with the first tool rest 5. At this time, by indexing and positioning the first spindle 3, it is of course possible to perform milling and drilling using a rotary tool. In this machining on the first spindle 3 side, since the headstock 2 is fixed, heavy cutting is possible.

Next, if necessary, after matching the phases of the first spindle 3 and the second spindle 9, move the second spindle 9 toward the first spindle in the Z-axis direction to move the workpiece 24 away from the first spindle 3. Change the grip to the second main shaft 9. Then, the gripping portion of the first spindle 3 is turned. Next, with the milling cutter attached to the second talent 12, the tool is fed by moving the second tool rest 11 in the X-axis direction,
The chamfered portion 25 is machined by cutting feed by moving the second headstock 8 in the X-axis direction and moving the second moving table 13 in the Y-axis direction. The eccentric hole 26 is machined by positioning by moving the table 8 in the X-axis direction and by moving the second movable table 13 in the Y-axis direction, and feeding the tool by moving the second tool rest 11 in the X-axis direction.

(Effects of the Invention) As described above, according to the present invention, the tool rest is supported by the 2N slide surface, the headstock is supported by the IN slide surface, and the relative movement between the workpiece and the cutter in the three-dimensional direction This makes it possible to process the tool post and avoid problems with the reduction in rigidity of the tool post and the installation structure and movement space. Furthermore, in a two-spindle opposed lathe, it is necessary to make at least one headstock movable in the Z-axis direction for transferring the workpiece, so the present invention utilizes the movement of the headstock in the X-axis direction as is. By adopting the structure of the present invention only on one of the headstock sides, a lathe with a rational structure that is capable of both heavy turning and compound machining can be obtained. In addition, by adopting a slant-type bed, chips can be removed better, the equipment can be configured more compactly, and the sliding surface can be avoided from being vertical, providing stable support for the moving table and tool post. It is possible to easily achieve accurate feeding.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a two-spindle opposing lathe of the present invention, FIG. 2 is a cross-sectional view of section A in FIG. , Figures 4 and 5
The figure is a perspective view showing a conventional example. In the figure, 1: Bed 2: First spindle 8: Second headstock 9: Second spindle 11: Second turret 1
3: Second moving table 15: Main slide surface 18: Slide surface 19: Slide surface

Claims (2)

[Claims] (1) In a two-spindle opposing lathe with a first headstock (2) and a second headstock (8) facing each other, at least one headstock (8) is movable in the Z-axis direction, which is the direction of the main spindle axis. The turret (11), which performs machining in cooperation with the main spindle (9) of one of the headstocks, is mounted in the X-axis direction perpendicular to the Z-axis and in the direction perpendicular to the A two-spindle opposing lathe, characterized in that it is movable only in both the Y-axis direction and the Y-axis direction. (2) The main sliding surface where the bed (1) is tilted toward you (
It is a slant type with a main sliding surface (15).
) is formed, and the slide surface (18) in the Y-axis direction is formed to be perpendicular to the slide surface (18) and inclined backward.
) is provided, and the upper end of this moving table (13) extends rearward and diagonally upward to form the slide surface (19) in the X-axis direction. 2. The two-spindle opposed lathe according to claim 1, wherein the surface (19) is equipped with a tool rest (11) that cooperates with the one head stock (8).