JPH0248105A - Machine tool having multi-spindle head - Google Patents

Abstract

PURPOSE:To enable the machine tool in the title to flexibly respond to changes of work, so as to improve productivity and lower costs by demountably mounting a multi-spindle head to a gear head in a row or plural rows along the length direction of a first rail. CONSTITUTION:Drills 17 are divided into groups according to drilling spots of a work 13 and mounted respectively on multi-spindle heads 18a, 18b, 18c for each group. The multi-spindle head 18 is arranged on a gear head main body 9 along the length direction of a first rail 11. And when a position to be machined of the work 13 changes, a multi-spindle head having a tool according to a changed position is removed from the gear head 9 and instead a multi- spindle head having a tool according to a new position or a new machining content is mounted on the gear head 9. The gear head 9 need not be changed even when all multi-spindle heads are exchanged.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a machine tool equipped with a multi-axis spindle head.

[Conventional technology]

For example, a machine tool as shown in FIG. 6 is used to perform processing such as drilling holes in large-sized workpieces such as cylinder blocks and cylinder heads.

In this figure, reference numeral 1 designates a first rail for guiding the first slider 2 in the processing direction a.

A second rail 3 perpendicular to the first rail 1 is fixed on the first slider 2, and a turret 5 is mounted on the second rail 3 via a second slider 4. is set up.

The turret 5 has four gear heads 6a, 6b.

6c, 6d are arranged, and each gear head 6a, 6b, 6c, 6d is indexed by a four-index indexing device 7 installed on the second slider 4.

Each gear head 6a, 6b, 6c, 6d is provided with a spindle 8 equipped with various tools, and after a desired gear head 6a is indexed in the machining direction a, the gear head 6a is rotated by rotation of a gear train within the gear head 6a. The spindle 8 is adapted to rotate.

Further, one gear head 6a of the machine tool shown in FIG. 6,
A machine tool may be used in which a portion corresponding to any one of 6b, 6c, and 6d is enlarged and installed on the first and second rails 1.3.

(Problem to be Solved by the Invention) However, the former index type machine tool rotates the turret 7 to set the desired gear heads 6a, 6b.
, 6c, and 6d - The gear head cannot be made very large. Therefore, there is a drawback that the number of spindles that can be provided in each gear head 6a, 6b, 6c, and 6d is severely restricted, and the target workpieces are limited.

The latter method, in which one gear head is made larger, can increase the number of spindles, but if the drilling position or workpiece itself is changed, it is necessary to convert the gear head all at once or install a new processing machine. There is a problem in that it requires a large amount of cost and time to manufacture.

[Means to solve the problem]

In order to solve the above problems, the present invention employs the following configuration.

The first part extends in a direction parallel to the placement surface of the workpiece to be machined.
A second rail is provided on the rail via a first slider and is perpendicular to the first rail, and a gear head main body is installed on the second rail via a second slider. .

Further, tools are grouped in correspondence to each group of the workpiece parts that are grouped into a plurality of groups of the workpiece, and each group is held in a multi-axis spindle head. Grouping is performed such as those whose locations are close to each other, those whose drilling depths are the same, and so on.

The tools include drilling processing, poling processing,
There are tools such as knives used for milling, tapping, reaming, etc.

The multi-axis spindle head is removably arranged in one or more rows on the gear head along the length of the first rail.

[For production]

the gearhead moves along the first and second rails;
Approaching or moving away from the part to be processed on the workpiece.

All multi-axis spindle heads are driven by the rotation of gears within the gear head body, and rotate their respective tools. As a result, a predetermined process such as drilling is performed on the part of the workpiece to be processed.

When the position of the workpiece changes, such as when the workpiece is changed, the multi-axis spindle head with the tool corresponding to the changed position is removed from the gear head, and the multi-axis spindle head with the tool corresponding to the changed position is removed from the gear head and replaced with a new position or new machining content. Attach the multi-axis spindle head with the corresponding tool to the gear head. The gearhead does not need to be changed even when all multi-spindle heads are replaced.

Note that the multi-axis spindle head can be replaced, for example, by a robot.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

(Embodiment 1) FIGS. 1 to 3 show a multi-axis drilling machine which is a first embodiment of the present invention.

The gear head main body 9 and spindle drive motor 10 of this multi-axis drilling machine are mounted on both a first rail 11 and a second rail 12, and these rails 11.1
It is possible to move freely on one plane under the guidance regulations of 2.

The first rail 11 extends in a direction parallel to the placement surface 14 of the drilling location that is the workpiece 13, and a first rail 11 extending perpendicularly to the first rail 11 is provided on the first rail 11 via a first slider 15. Two rails 12 are provided. A second slider 16 is mounted on the second rail 12, and the gear head main body 9 and the spindle drive motor 10 are installed on the second slider 16.

In addition, in this case, there are six holes to be drilled on the workpiece 13, and the adjacent ones are divided into two groups, and the drill 17 is also divided into groups corresponding to each of these groups.
Multi-axis spindle heads 18a, 18 for each group, respectively.
b, attached to 18c.

A multi-axis spindle head 18 is provided on three sides in this case and is arranged on the gear head body 9 along the length of the first rail 11 .

Further, each multi-axis spindle head 18 is attached to the gear head main body 9 as shown in FIG.

In FIG. 3, reference numeral 19 indicates a spindle held in the gear head body 9 via a support bearing 20 in parallel with the length direction of the second rail 12. This spindle 19 has multi-axis spindle heads L8a and L8b.
, L8c.

A gear 21 is fixed to the outer periphery of the intermediate portion of the spindle 19, and the gear 21 meshes with a gear 22 inside the gear head body 9. The gears 21 and 22 are rotated by the spindle drive motor 10.

The rotation of these gears 21, 22 causes each spindle 19 to
will rotate at a predetermined number of rotations.

The spindle 19 also has a collet chuck 23 at its axial center, and a recess 25 at the front for guiding the locking part 24 of the multi-axis spindle head 18 to the collet chuck 23.
The collet chuck 23 is equipped with a rotating cylinder 27 at the rear for operating the operating rod 26 of the collet chuck 23.

The rotating cylinder 27 is fixed to the rear of the spindle 19,
It is hydraulically rotated and the operating rod 26 is hydraulically slid back and forth. Reference numeral 28 designates a rotary joint for supplying hydraulic oil to this rotating cylinder 27, and this joint 28 is fixed toward the gear head body 9.

Further, reference numeral 29 designates a hook for fixing the casing of the multi-axis spindle head 18 toward the gear head main body 9 so that the casing does not rotate.

Usually, a robot (not shown) is used to attach and detach the multi-axis spindle head 18 to and from such a spindle 19. That is, the rotary cylinder 27 is rotated by a signal from the control unit (not shown) of the multi-axis drilling machine, and the operating rod 26 is pushed in the direction of the arrow to open the collet chuck 23 and release the current multi-axis spindle head 18. do. Then, the robot rotates this opened multi-axis spindle head 18.
However, the bridge was removed and a new multi-spindle head 18 was installed in its place.
is loaded into the collet chuck 23. The collet chuck 23 closes its mouth and fixes the new multi-axis spindle head 18 toward the spindle 19 by sliding the operating rod 26 in the direction of arrow C due to the rotation of the rotating cylinder 27 in the opposite direction.

(Embodiment 2) FIGS. 4 and 5 show a multi-axis drilling machine which is a second embodiment of the present invention. Note that the same parts as in Example 1 are indicated by the same reference numerals, and detailed explanations will be omitted.

In this case, five multi-axis spindle heads 18 to 18 are installed in two stages above and below the gear head 9. Further, each multi-axis spindle head 18 has two drills 17.

Therefore, drilling can be performed at 20 locations at the same time.

Incidentally, each multi-axis spindle head 18 is attached to the gear head 9 using a collet chuck having the same structure as shown in FIG.

〔Effect of the invention〕

As described above, a machine tool equipped with a multi-axis spindle head according to the present invention has a first slider mounted on a first rail extending in a direction parallel to the placement surface of a workpiece to be machined. A second rail is provided perpendicular to the first rail,
A gear head main body is installed on the second rail via a second slider, and tools are grouped into groups corresponding to each group of workpieces that are grouped into a plurality of groups. Each multi-axis spindle head is removably arranged in one or more rows on the gear head along the length of the first rail, so that the workpiece itself Or, even if there is a change in the processing location, etc., it is sufficient to replace all or part of the spindle head, and there is no need to change the gear head itself. Therefore, it is possible to flexibly deal with changes in workpieces, improve productivity, and reduce costs.

Further, since the tools are divided into a plurality of sets and each multi-axis spindle head is made smaller and lighter in weight, it is possible to easily and quickly attach and detach the tools to the gear head.

[Brief explanation of the drawing]

1 to 3 show an embodiment of a machine tool equipped with a multi-axis spindle head according to the present invention, in which FIG. 1 is a partially cutaway plan view, FIG. 2 is a partially cutaway elevation view, and FIG. The figure is the first
4 and 5 show other embodiments of the present invention, FIG. 4 is a partially cutaway plan view, FIG. 5 is a partially cutaway elevation view, and FIG. 1 is a perspective view of a machine tool equipped with a conventional multi-axis spindle head. 9: Gear head body, 11: First rail, 12: Second
rail, 13: workpiece, 14: machining point placement surface, 17
: Drill, 18: Multi-axis spindle head, 19 Nissin spindle, 23: Collet chuck, 27: Rotating cylinder,
28: Rotary joint.

Claims (1)

[Claims] The first part extends in a direction parallel to the placement surface of the workpiece to be machined.
A second rail is provided on the rail via a first slider and is perpendicular to the first rail, and a gear head main body is installed on the second rail via a second slider. , tools grouped in correspondence to each group of workpiece parts grouped into a plurality of groups of the workpiece are each held in a multi-axis spindle head for each group, and each multi-axis spindle head is connected to the first A machine tool equipped with a multi-axis spindle head, characterized in that the multi-axis spindle head is removably arranged in one or more rows on the gear head along the length of the rail.