JP2785520B2 - Boring equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-axis boring machine.

[0002]

2. Description of the Related Art As this kind of multi-axis boring apparatus, for example, a three-axis type boring apparatus as shown in FIGS. 4 and 5 is known. This is achieved by arranging a pair of slide units 34 and 35 having a spindle head 32 or 33 on a bed 31 with a jig table 36 interposed therebetween.
Similarly, a slide unit 39 having a spindle head 38 is arranged in a gate-shaped column 37 arranged so as to straddle one slide unit 35. In addition,
The axis of the spindle head 38 is offset from the axis of the spindle heads 32 and 33 by a predetermined amount a as shown in FIG.

[0003] Since the work W to be processed is fixed to the jig table 36, the spindle heads 32 and 33 of the horizontally arranged slide units 34 and 35 advance with respect to the work W, and at the same time, the vertical posture. By lowering the spindle head 38 of the slide unit 39, boring of the workpiece W from three directions is performed simultaneously.

[0004]

In the conventional boring apparatus as described above, the spindle heads 32, 33 of the slide units 34, 35 in the horizontal posture slide respectively, so that each spindle head 3
In addition to the radial thermal expansion accompanying the rotation of the main shafts 40 and 41 of the slide units 2 and 33, positional accuracy errors due to heat generation and wear on the slide guide surfaces of the slide units 34 and 35 are accumulated. It is difficult to maintain the coaxial accuracy of the main shafts 40 and 41 for a long time. As a result, the coaxial accuracy of the holes machined by the respective spindles 40 and 41 decreases,
There is a limit to the improvement of processing quality.

Further, in order to eliminate the above-mentioned factor of lowering the processing accuracy due to heat, each of the slide units 34, 35,
A large amount of lubricating oil is supplied to the sliding portion 39, but in this case, a cooling device or the like for cooling the lubricating oil must be provided, and the entire device becomes large and complicated. It is not preferable to do so.

The present invention has been made on the basis of the above-described problems, and when boring with a pair of spindle heads facing each other, the coaxial accuracy between the main spindles of both spindle heads is particularly maintained for a long period of time. It is an object to provide a structure that can be used.

[0007]

In the boring apparatus of the present invention, spindle heads opposed to each other on the same horizontal horizontal axis are fixedly arranged at both ends of a bed, and a predetermined feed is provided on the bed. a column which reciprocates between a processing position by given one of a spindle head and a processing position by the other of the spindle head is provided, it is on the column Ru provided a jig table for fixing the workpiece
At the same time, slide vertically while facing this jig table.
Slide unit with rideable spindle head
Characterized in that a bets.

[0008]

[Action] According to this structure, the conventional unlike pairs in the horizontal direction
A pair of spindle heads arranged so as to face each other is fixed to the bed side, and the column to which the work is fixed moves between the pair of spindle heads in the horizontal direction. Its own degree of freedom
And the degree of freedom of the slide unit mounted on that column
Only two axes. The pair of spindle heads facing each other in the horizontal direction does not move while being fixed to the bed, and the coaxial accuracy of the main shafts of both spindle heads can be easily maintained.

[0009]

1 and 2 show an embodiment of the present invention. A bed 1 is provided with a slide guide surface 2 at the center in the longitudinal direction.
A pair of spindle heads 3 and 4 are fixed so as to face each other on the same axis.

The spindle heads 3 and 4 are
A cutter 8 is provided at the tip of a main shaft 6 or 7 rotatably supported by a bearing.
It is rotationally driven by a spindle motor 9 mounted thereon.

A column 1 is provided on the slide guide surface 2 of the bed 1.
The column 10 is reciprocated while being guided by the slide guide surface 2 by being fed by a feeding device (not shown).

The column 10 is provided with a jig table 11 for fixing the work W. The column 10 has a spindle head 12 above the jig table 11.
Is provided. The axis of the main shaft 14 of the spindle head 12 is offset by a predetermined amount b with respect to the axis of the spindle heads 3 and 4, and the spindle head 12 moves up and down by being given a predetermined feed by the feed device 15. . Also, spindle 1
A cutter 16 is provided at the tip of 4, and the spindle 14 is driven to rotate by a spindle motor 17.

Here, as shown in FIGS. 3A to 3C, the offset amount b is determined by machining holes P1 and P1 on the workpiece W side.
It matches the offset amount c between P2 and the hole P3.

In the boring apparatus thus configured, the workpiece W to be machined is placed on the jig table 1.
1, the spindles 6, 7, and 14 of the spindle heads 3, 4, and 12 are simultaneously rotated and driven to feed the column 10, and the column 10 reciprocates along the slide guide surface 2. By moving, the holes P1, P2, and P3 of the work W are machined as shown in FIG.

That is, when the column 10 first moves to one of the pair of spindle heads 3 and 4, one of the holes P1 and P2 is machined. The column 10 is moved to the other spindle head side after the completion of the hole processing, whereby the other hole is processed.

As the column 10 is reciprocated while being guided by the slide guide surface 2 as described above, the spindle head 12 is lowered, and another hole P3 is machined.

As described above, according to this embodiment, the pair of spindle heads 3 and 4 which are horizontally arranged are fixed and the column 1
By moving the 0 side, the degree of freedom of slide is reduced by one axis to two degrees of freedom even though the processing axis is three axes as in the past, so the processing accuracy due to wear of the slide guide surface etc. The reduction factor is reduced, and the processing accuracy can be easily maintained.

In particular, since the pair of spindle heads 3 and 4 disposed opposite to each other remain fixed to the bed 1, the spindle heads 3 and 4 are not affected by the wear of the slide guide surface as in the related art. 4 main shafts 6, 7
Long-life coaxial accuracy can be maintained.

Moreover, even if the slide guide surface 2 guiding the column 10 is worn, the slide guide surface 2
The change in position due to the wear of the head becomes a change in the vertical direction, and thus coincides with the stroke direction of the spindle head 12. Therefore, the change in position due to the wear of the slide guide surface 2 can be absorbed by correcting the feed stroke of the spindle head 12, so that the processing quality of the work W is not affected.

[0020]

As described above, according to the present invention, spindle heads opposed to each other on the same axis are fixedly arranged at both ends of the bed, and a predetermined feed is given to the bed so that of a column which reciprocates between a processing position by the processing position and the other spindle head of the spindle head is provided, it is on the column provided a jig table for fixing the workpiece Rutotomoni, the jig table
Spindle that can slide vertically while facing the
By providing a slide unit with a slide , the degree of freedom for machining is reduced by one axis compared to the conventional model, so that the wear on the slide guide surface has less effect on machining accuracy and machining quality is improved. .

Further, since the pair of spindles head disposed so as to face in the horizontal direction remains fixed to the bed, that the slide guide surface of the conventional spindle head as to affect the axial alignment between the spindle In addition, the coaxial accuracy between the spindles and the holes to be machined can be maintained for a long time, and the machining accuracy is improved.

Further, since a pair of spindle heads that are opposed in the horizontal direction are fixed as described above, a portion that requires supply of lubricating oil is reduced. The cooling device also needs to be as small as necessary, and the entire device can be reduced in size and simplified.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a plan view of FIG. 2;

FIG. 3 is a diagram showing an example of a work to be processed;
(A) is a front view, (B) is a plan view of the same figure (A), (C)
2 is a right side view of FIG.

FIG. 4 is an explanatory front view showing an example of a conventional boring apparatus.

FIG. 5 is an explanatory right side view of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Bed 2 ... Slide guide surface 3,4 ... Spindle head 6,7 ... Spindle 10 ... Column 11 ... Jig table 12 ... Spindle head 13 ... Slide unit W ... Work

Claims (1)

(57) [Claims] 1. A spindle head opposed to each other on the same horizontal horizontal axis is fixedly arranged at both ends of a bed, and a predetermined feed is given on the bed so that a processing position by one spindle head is determined. A column that reciprocates between the other spindle head and the processing position is provided, and a jig table for fixing a work is provided on the column.
While facing the jig table vertically
Slide unit with slidable spindle head
A boring machine equipped with a drilling machine.