JP2526162B2 - Multi-tasking machine tool - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite machining machine tool which can be machined from a material to a product with a single machine and is particularly suitable for a long product.

Conventional technology When processing a long object, a fixed steady rest is used to prevent chattering and runout, and it is placed at a position where no chattering occurs.
One piece or a plurality of pieces are arranged, the work such as setting of the work and centering of the steady rest are performed, and then the work is performed by one tool post.

Problems to be Solved by the Invention When such a steady rest is used, it takes time for centering and setting, and in order to use the steady rest, the steady rest contact portion must be processed by another machine in advance. There was a problem. Also, when machining the entire area of the workpiece, it is necessary to change the position of the steady rest during the machining, but it is necessary to pre-machine the position where the steady rest works, so the steady rest can be set at any position. There is a problem that you cannot work.

The present invention has been made in order to solve the problems of the prior art, and the purpose thereof is to reduce dead time such as centering work for vibration isolation and pre-processing of a workpiece. It is intended to provide a composite machining machine tool that improves efficiency.

Means for Solving the Problems To achieve the above object, the present invention provides a fixed first headstock for bearing a hollow spindle, and a spindle concentric with the spindle of the first headstock for axial movement. It is possible to move in the axial direction by bearing a second headstock that is provided opposite to each other and a rotary shaft that is hollow between the first headstock and the second headstock and that is concentric with the main shaft and has chucks at both ends. And an intermediate headstock, and a drive means for synchronously rotating the main spindle of the first headstock, the main spindle of the second headstock, and the rotary shaft of the intermediate headstock.

Then, a tool rest for turning and milling and a whetstone stand for grinding are provided so as to be movable in the X and Z directions.
Further, the tool rest and the grindstone stand are provided in arbitrary combination on both sides of the spindle axis.

According to claim 1, the long work piece inserted through the spindle center of the fixed headstock passes through the center of the rotation axis of the intermediate headstock to reach the opposing tool post, and is gripped by the chucks of the respective headstocks and intermediate headstocks. ， The work is rotated by the synchronous rotation of the rotating shaft.

In Claims 2 and 3, necessary turning is performed on the workpiece rotated in the above state at one position or two or more positions separately or simultaneously by controlling the tool rest, and further grinding at the predetermined position by controlling the grindstone. On the same machine.

Embodiment An embodiment of the present invention will be described below with reference to FIG.

On a bed (not shown), a fixed headstock 1 in which a hollow spindle 3 having a power chuck 2 fitted at its tip is rotatably supported by bearings is provided, and the spindle 3 is suitable for turning and grinding by a motor (not shown). It is selectively driven to rotate.

On the bed, Z that is parallel to the spindle axis of the fixed headstock 1
An axial guide surface 4 is formed, and a hollow spindle 7 having a power chuck 6 fitted at its tip is movably provided with an opposed headstock 5 rotatably supported by bearings. Although the hollow main shaft 7 does not necessarily have to be hollow, it is rotated by a motor and a control device (not shown) like the main shaft 3 and is rotated in synchronization with the main shaft 3 for turning and grinding. The opposed headstock 5 is moved by a feed screw (not shown), a motor and a controller to
Positioning is controlled in the axial direction.

Between the fixed headstock 1 and the opposed headstock 5, there is an intermediate headstock 10 that rotatably bears a hollow rotary shaft 13 concentric with the main shaft and fitted with power chucks 11 and 12 at both ends. The rotary shaft 13 is movably mounted on the guide surface 4 and is rotated by the motor and controller (not shown) in the same manner as the main shaft 3 for turning and grinding and in synchronization with the main shaft 3. The position of the intermediate headstock 10 is controlled in the Z-axis direction by the feed screw, the motor and the control device. The intermediate headstock 10 does not necessarily have to be on the guide surface 4, but may be provided on another guide surface formed in parallel.

Furthermore, a Z-axis direction guide surface parallel to the guide surface 4 is provided on the bed.
15 is formed away from the spindle axis center, and a slide table 16 is movably mounted on the slide table 16 and a turning tool for mounting a turning tool T1 or a rotary tool on an X-axis direction guide surface 16a on the upper surface of the slide table 16. A tool rest 18 having a turret 17 to be taken out is movably mounted. The slide base 16 is positionally controlled in the Z-axis direction by a feed screw, a motor and a controller (not shown), and the tool rest 18 is positionally controlled in the X-axis by a feed screw, a motor and a controller (not shown).

Furthermore, the slide base 21 is movably mounted on the guide surface 15, and the grindstone G is attached to the X-axis direction guide surface 21a on the upper surface of the slide base 21.
Grinding wheel base that rotatably supports the grinding wheel shaft equipped with 1.
2 is movably mounted. The slide base 21 is positioned in the Z-axis direction by a feed screw, a motor, and a controller (not shown), and the grindstone base 22 is positioned in the X-axis direction by a feed screw, a motor, and a controller (not shown). Then, one of the tool rest 18 and the grindstone rest 22 can be retracted to the guide end at a position where they do not interfere with each other during the work. Furthermore, if necessary, a Z-axis direction guide surface 15, a tool rest 18, and a grindstone rest 22 having the same function can be provided on the opposite side to the spindle axis as a virtual line. Further, the tool rest 18 and the grindstone base 22 can be arbitrarily combined with each other, such that two tool rests on one side and two grindstone mounts on the opposite side, or one grindstone mount on one side,
Combinations such as one turret and two turrets on the opposite side can be freely selected.

Now in FIG. 1, guide surfaces 15, 1 on both sides with respect to the axis of the spindle.
It is assumed that one tool rest 18, 18 'grindstone rest 22, 22' is provided on each 5 '.

In the diagram showing the processing sequence in Fig. 2, with chucks 2, 6, 11, 12 open, (a) shows that the long workpiece is fed out by the bar material feeder and the intermediate headstock 10 rotates from inside the spindle 3. Axis 13 chuck 12
It is fed to a position protruding from the inside, and the chuck 6 of the opposed headstock 5 grips the tip of the workpiece. When the bar material feed amount is insufficient, the opposed headstock 5 is moved as necessary to pull out the workpiece W to a predetermined position. The intermediate headstock 10 is positioned at a predetermined position, and the chucks 2, 11 and 12 are closed. Spindle 3,7
Is synchronously rotated at the rotational speed for turning, and the rotary shaft 13 is also synchronously rotated, and the tool rests 18 and 18 'are position-controlled to be cut to a predetermined diameter by the tools T1 and T2. At this time, the grinding wheel base 22 is on standby at the retracted position at the right end.

(B) opens the chucks 11 and 12 of the intermediate headstock 10 and is positioned at a predetermined position. The tool rest 18 is moved to the opposing headstock 5 side and a predetermined position between the toolstock 18 and the intermediate headstock 10 is turned. Turret
If the machining range of 18 is long, chuck 11
2 is opened and the position of the intermediate headstock 10 is controlled outside the machining range by Z-position control, and the chucks 11 and 12 are closed to continue machining without interruption.

In (c), the chucks 11 and 12 of the intermediate headstock 10 are opened and positioned near the right end of the workpiece W. The chuck 6 of the facing headstock 5 is opened and retracted to the right. Tool post 18 and workpiece W
Move to the right end of and rotate the W end of the workpiece.

In (d), the tool rest 18 is set to the standby position at the left end, the facing spindle head 5 is moved to the left, and the chuck 6 grips the work W end. The chucks 11 and 12 of the intermediate headstock 10 are opened and moved leftward to be positioned at a predetermined position. The grindstone base 22 is moved to the fixed headstock 1 side, and a part of the turning position is ground.

In (e), the whetstone base 22 is controlled to move and retracted to the right end standby position or a position where it does not interfere. The turning tool of the turret 18 is replaced with the parting tool T3 by turning the turret 17. The workpiece 18 is cut in front of the chuck 2 by controlling the tool rest 18 in the X and Z axes.

Effects Since the present invention is configured as described above, the present invention has the following effects.

According to the first aspect of the present invention, the centering of the swing stop used at the time of machining a long work piece is unnecessary. Further, the pre-processing of the vibration-proof portion is unnecessary, and the processing man-hour can be reduced.

The products of claims 2 and 3 can also process a workpiece that requires a grinding process, do not require a transfer process and setup time in a grinding machine, and can complete from material to finished product with one machine, efficient processing You can Further, when the machining range of the central portion is long, the intermediate headstock can be moved during machining and the rotary shaft is synchronously rotated, so that a uniform machined surface can be obtained.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a combined machining machine tool of the present invention, and FIG. 2 is a diagram showing an example of a machining sequence. 1 …… Fixed headstock, 5 …… opposed headstock 2,6,11,12 …… Chuck 4,15 …… Guide surface, 10 …… Intermediate headstock 18 …… Turret, 22 …… Grinding head

Claims (3)

(57) [Claims] 1. A fixed first headstock bearing a hollow spindle, and a second headstock bearing a spindle concentric with the spindle of the first headstock and axially movably opposed to each other. An intermediate headstock which is concentric with the headstock and hollow between the first headstock and the second headstock and axially movable while bearing a rotary shaft having chucks at both ends thereof; and a main spindle of the first headstock. A multi-task machine tool comprising: a drive unit that allows the spindle of the second headstock and the rotary shaft of the intermediate headstock to rotate synchronously. 2. A multi-task machine tool according to claim 1, further comprising a tool post for turning and milling that can move in the X and Z axes and a grinding wheel head that can move in the X and Z axes. . 3. The combined machining according to claim 1, wherein a turning tool post, a milling tool post, and a grinding wheel post are provided in arbitrary combination on guide surfaces provided on both sides of the spindle axis. Machine Tools.