JP3320106B2 - Machine Tools - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machine tool such as a vertical machining center configured to partition a machining table into a machining side area and a setup side area by partition walls, and in particular, to reduce the size of a small workpiece to a table size by one unit. The present invention relates to a structure capable of handling even large workpieces, thereby suppressing an increase in installation space and an increase in equipment costs.

[0002]

2. Description of the Related Art As an example of this type of machine tool,
There is a structure proposed in Japanese Utility Model Laid-Open No. 63-182839. As shown in FIG. 5, this is a three-axis movable column traverse type vertical machining center 1 in which a saddle 3 that moves in the X-axis direction (a direction perpendicular to the plane of FIG. 5) is arranged at the rear of the bed 2. A column 4 is arranged on the saddle 3 so as to be movable in the Y-axis direction (lateral direction), and a spindle head 5 is arranged at the front end of the column 4 so as to be movable in the Z-axis direction (vertical direction). I have. A processing table 6 is provided at the front of the bed 2, and the processing table 6 is configured to reciprocate at an angle of 180 degrees in a horizontal plane about a turning shaft 6a thereof. . Further, a partition 7 is provided upright on the turning shaft 6a of the processing table 6, and the upper surface of the processing table 6 is formed by the partition 7 on the processing side area A.
And a setup side area B. According to the vertical machining center 1, the next workpiece 9 can be set in the setup side area B while the workpiece 8 is being cut in the processing side area A of the processing table 6, thereby improving workability.
Productivity can be improved.

[0003]

However, in the conventional vertical machining center 1 described above, the Y-axis stroke of the spindle head 5 is limited to the normal machining area Y in which the spindle head 5 does not interfere with the partition 7.
The size of the work 8 that can be processed is restricted by the normal processing area Y. As a result, it is not possible to cope with a workpiece having a size exceeding the normal machining area Y, and a larger machining table and a machine main body are required to cope with such a problem. There is.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional situation, and is not limited to a small workpiece in a normal machining area without increasing the size of a machining table and a machine main body, but also a large workpiece having a size exceeding the normal machining area. It is an object of the present invention to provide a machine tool that can handle a workpiece and avoid an increase in installation space and an increase in equipment cost.

[0005]

SUMMARY OF THE INVENTION In view of the above, a first aspect of the present invention is to provide a machining table which can be pivoted on a horizontal axis in a horizontal plane, and a machining-side area which is arranged near the pivot axis on the upper surface of the machining table. With a partition partitioning into the setup side area,
In a machine tool in which the spindle head is movable in a direction perpendicular to the pivot axis (Y-axis direction), the partition is detachable or retractable to a position where the spindle head does not interfere with the spindle head. It is characterized in that the shaft stroke is larger than the normal machining area toward the setup side area.

According to a second aspect of the present invention, there is provided a setting means for setting the presence or absence of a partition on the processing table, and when the setting of the partition is set by the setting means, the Y-axis stroke is set within the normal processing area. And a Y-axis stroke control means for controlling the Y-axis stroke toward the setup side area in a special machining area exceeding the normal machining area when the partition is set to nothing. .

Here, the normal machining area in the present invention is
This area is processed while controlling the Y-axis stroke so that the spindle head does not interfere with the partition. Further, the special machining area is an area where machining is performed while controlling the Y-axis stroke beyond the normal machining area toward the setup side area, and it is preferable that the machining area exceed the turning axis of the machining table. Of course.

The setting means according to the present invention includes a detection switch such as a limit switch for detecting the presence or absence of a partition, a push button switch which is manually operated by an operator, and a control program for setting the presence or absence of the partition. Etc. are included.

[0009]

In order to machine a workpiece with the machine tool according to the present invention, in the case of a normal small workpiece, a setup is performed while machining the workpiece in a normal machining area with a partition wall mounted on a machining table. Set the next workpiece in the side area. In the case of the special machining area and the large workpiece having a size exceeding the turning axis, the special machining area of the large workpiece is machined with the partition wall removed or retracted. The unprocessed portion of the workpiece is machined by turning the machining table. When processing a workpiece having a size exceeding the normal processing area and within the special processing area, set the workpiece in the special processing area on the processing table with the partition wall removed or retracted. And processing.

Thus, according to the machine tool of the first aspect of the present invention, the partition partitioning the machining-side area and the setup-side area is configured to be removable or retractable, and the Y-axis stroke of the spindle axis is usually reduced. Since the size is set so as to exceed the machining area, a single large work piece with a size exceeding the normal machining area or even the special machining area from a small workpiece in the normal machining area with one machining table and machine body Therefore, it is possible to suppress an increase in installation space and an increase in equipment costs.

According to the second aspect of the present invention, there is provided a setting means for setting the presence or absence of a partition on the processing table, and the Y-axis stroke of the head of the spindle is switched and controlled by a signal indicating whether or not a partition is provided from the setting means. Therefore, it is possible to reliably prevent the spindle head from interfering with the partition wall, thereby preventing erroneous operation.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIGS. 1 to 4 are views for explaining a vertical machining center according to an embodiment of the present invention.
Is a side view, FIG. 2 is a front view, and FIG. 4 is a plan view. In each drawing, the same reference numerals as those in FIG. 5 indicate the same or corresponding parts.

In FIG. 1, reference numeral 10 denotes a three-axis movable column traverse type vertical machining center employing the structure of this embodiment. In this vertical machining center 10, a saddle 3 is arranged on the rear upper surface of the bed 2 so as to be movable in the X-axis direction, and a column 4 is arranged on the saddle 3 so as to be movable in the Y-axis direction. The spindle head 5 is arranged so as to be movable in the Z-axis direction.

A spindle 5a is rotatably attached to the lower end of the spindle head 5, and a tool 11 is detachably attached to the spindle 5a. At the rear end of the bed 2, a control device 12 is provided, and the control device 12 is configured to drive the saddle 3, column 4, and spindle head 5 according to a predetermined program.

A processing table 6 is provided on the upper surface of the front part of the bed 2. The table 6 is constructed so as to reciprocate at an angle of 180 degrees in a horizontal plane about the pivot 6a. Further, a partition 13 extending in the X-axis direction is disposed on the turning shaft 6a of the processing table 6, and the processing table 6 is divided into a processing-side area A and a setup-side area B by the partition 13. .

As shown in FIGS. 1 and 3, the partition 13 can be moved up and down from the mounting position on the processing table 6 to the retracted position above the setup side area B. It is configured to be retractable to a position that does not interfere with the spindle head 5.

Further, the processing table 6 is provided with a detection switch (setting means) 14 for detecting the presence or absence of the partition 13. The detection switch 14 is connected to the partition 13
Is output to the control device 12 when is located on the processing table 6, and outputs no signal when the partition 13 is retracted.

When the control unit 12 receives a signal from the detection switch 14, the control unit 12 controls the spindle head 5
Is controlled within the normal machining area Y. The normal processing area Y is located on the partition table 1 located on the processing table 6.
3 is an area where the spindle head 5 does not interfere. Thus, when the partition 13 is mounted, the forward end of the spindle axis is restricted to a position where the spindle head 5 does not interfere with the partition 13. Also,
The control device 12 controls the Y-axis stroke of the spindle head 5 in the special machining area Y 'when no signal is input. The special processing area Y 'is an area that exceeds the above-described normal processing area Y toward the setup side area B, and is set to exceed the turning shaft 6a by the dimension a in the present embodiment. As a result, the forward end of the spindle axis at the time of retreat of the partition 13 is restricted to a position forward of the turning shaft 6a by a and does not interfere with the partition 13 at the retracted position.

Next, the operation and effect of this embodiment will be described. First, in order to perform normal machining with the vertical machining center 10 according to the present embodiment, as shown in FIGS. 3 and 4, the workpiece 8 is moved to the normal machining area Y with the partition 13 mounted on the machining table 6. And the workpiece 8 is processed in this state. Further, the next workpiece 9 is set in the setup side area B while performing the machining. When the processing of the workpiece 8 is completed, the partition 13 is retracted to the retracted position and the processing table 6 is turned by 180 degrees. Thus, the machined workpiece 8 is sent from the machining area A to the setup area B, and the unprocessed workpiece 9 is sent from the setup area B to the machining area A. This operation is performed sequentially and continuously.

Next, when machining a workpiece that exceeds the normal machining area Y and is in the special machining area Y ', the partition 13 is raised and retracted, and the Y-axis stroke of the spindle head 5 is reduced to the special machining area. Processing is performed while controlling with Y '.

Furthermore, when machining a workpiece 15 having a table size exceeding the special machining area Y ', FIG.
Then, as shown in FIG. 2, the partition 13 is raised and retracted, and the workpiece 15 is set on the processing table 6.
In this state, machining is performed within the range of the Y-axis stroke of the spindle head 5. After this processing, the processing table 6 is turned by 180 degrees, and the unprocessed portion of the workpiece 15 is processed.

As described above, according to this embodiment, the partition 13 is configured to be able to move up and down between the mounting position and the retracted position, and the Y-axis stroke of the spindle head 5 when the partition 13 is retracted is set to the normal machining area Y. Is controlled within the special machining area Y 'exceeding the above, so that machining can be performed over a wide range from the small workpieces 8 and 9 to the table-sized workpiece 15 as described above. Therefore, an increase in the arrangement space and an increase in equipment costs can be suppressed. In machining the work piece 15 having the above-mentioned table size, the point where the Y-axis stroke slightly exceeds the pivot axis and the point where the machining table is turned by 180 degrees are combined, so that the machine body is A table-sized workpiece can be machined while keeping it compact.

In this embodiment, when the partition 13 is mounted or retracted, the Y-axis stroke of the spindle head 5 is controlled in the normal machining area Y when the partition 13 is mounted. Since the spindle head 5 is controlled in the machining area Y ',
3 can be reliably avoided, and erroneous operation can be prevented.

In the above embodiment, the special processing area Y '
Is set to a size exceeding the turning axis 6a toward the setup side area B, but this need not necessarily be set, and the point is that the normal machining area Y may be set so as to exceed the setup side area B. . When the special machining area is set slightly closer to the main spindle side than the turning axis, it is preferable to offset the hole machining portion of the workpiece beyond the special machining area from the turning axis. In this way, by turning the machining table, machining of a large workpiece exceeding the special machining area becomes possible.

In the above embodiment, the case where the partition wall 13 can be moved up and down has been described as an example. However, in the present invention, the partition wall may be detachably attached. Further, the present invention can be applied to machine tools other than the vertical machining center as long as the machine tools have a turning table.

[0026]

As described above, according to the machine tool of the present invention, the partition for partitioning the processing table into the processing side and the setup side area can be removed, or can be retracted to a position where it does not interfere with the spindle head. The Y-axis stroke of the spindle axis at the time of removal or retraction is made larger than the normal machining area toward the setup side area, so that the machining table and machine body can be removed from small workpieces without increasing the size. It has the effect of being able to handle a wide range of large-scale workpieces, and consequently suppressing an increase in installation space and an increase in equipment costs.

[Brief description of the drawings]

FIG. 1 is a side view illustrating a vertical machining center according to an embodiment of the present invention.

FIG. 2 is a front view of the vertical machining center of the embodiment.

FIG. 3 is a side view of the vertical machining center of the embodiment.

FIG. 4 is a plan view of the vertical machining center of the embodiment.

FIG. 5 is a side view showing a conventional vertical machining center.

[Explanation of symbols]

 5 Spindle head 6 Machining table 6a Revolving axis 10 Vertical machining center (machine tool) 12 Control device (Y-axis stroke control means) 13 Partition wall 14 Detection switch (setting means) A Processing side area B Setup side area Y Normal processing area Y ' Special processing area

Claims (2)

(57) [Claims] 1. A processing table which is rotatable in a horizontal plane about a rotation axis, and a partition disposed near the rotation axis and partitions an upper surface of the processing table into a processing side area and a setup side area, In a machine tool in which the spindle head is movable in a direction perpendicular to the turning axis (Y-axis direction), the partition is detachable or retractable to a position where the spindle head does not interfere with the spindle head. A machine tool characterized in that an axial movement amount (hereinafter referred to as a Y-axis stroke) is larger than a normal machining area toward the setup side area. 2. The method according to claim 1, further comprising setting means for setting the presence or absence of the partition on the processing table, wherein when the setting of the partition is set by the setting means, the Y-axis stroke is set within the normal processing area. And a Y-axis stroke control means for controlling the Y-axis stroke toward a setup side area in a special processing area exceeding a normal processing area when the partition wall is set to be empty. machine.