JP4700590B2 - Horizontal machining center - Google Patents

Description

  The present invention relates to a horizontal machining center.

Conventionally, workpieces (workpieces) are processed using complex machine tools with the same processing accuracy and precision using machine tools with predetermined processing performance and processing accuracy. I was going. In recent years, by using an NC machine tool, it is possible to automatically process a workpiece without requiring such a skilled technique.
For example, a horizontal machining center is a machine tool suitable for machining a workpiece installed such that a machining surface is vertical by using a tool attached to a horizontal spindle.

  In such a horizontal machining center, there may be a configuration in which a vertical scale is provided on a rotary table, and workpieces are attached to both side surfaces of the main shaft side and the back surface side of the vertical scale. Thereby, while the workpiece on the spindle side is being machined, the workpiece to be machined next is attached to the back side, so that the workpiece can be exchanged smoothly.

  However, when a workpiece is attached to the side surface of such a vertical scale, the workpiece may be dropped at the time of attachment / detachment, so that the attachment / detachment of the workpiece has to be performed carefully. In addition, when automating and detaching a workpiece, it is necessary to dispose a loader on the back side of the scale, which causes a problem that the entire apparatus becomes large.

For this reason, Patent Document 1 discloses a horizontal machining center having a structure in which two pallets are arranged in front of and behind a main shaft on a horizontal rotary table, and a partition wall is erected between both pallets. Yes.
According to this machining center, the workpiece on the other pallet can be attached and detached while the workpiece fixed on the pallet on the spindle side is being machined. At this time, the partition wall is prevented from interfering with the tool attached to the main shaft at the time of attachment / detachment.

  Since the work is mounted on a horizontally placed pallet, it can be done by placing the work from above and then fixing it, dropping the work when attaching or detaching the work, or placing the loader opposite the spindle Problems such as an increase in the size of the device placed on the side have been solved.

JP 2000-24866 ([0013]-[0015], FIG. 1)

However, the conventional horizontal machining center processes a workpiece having a bottom fixed so as to stand on a horizontal table via a horizontal main shaft. For this reason, since the workpiece having only the bottom portion fixed is processed from the side, the workpiece itself needs to have sufficient rigidity with respect to the horizontal force during processing.
In addition, since the configuration is such that two workpieces are arranged on the front and rear of a horizontal table, there is a limit to downsizing the apparatus.

  The present invention has been made in order to solve the above-described problems, and prevents a drop when a workpiece is attached / detached, and also allows a horizontal force acting when the workpiece is processed to be handled from the back side of the workpiece. The problem is to propose a machining center.

In order to solve the above problems, the present invention includes a main shaft rotation axis is disposed so that the horizontal, a turntable rotation axis is inclined 45 ° to the axis of rotation of the main shaft, the turn A horizontal machining center comprising a work fixing part fixed to the upper surface of a table and a jig arranged on the work fixing part for fixing the work, wherein the turntable has a through hole in the center part. And the jig is controlled by a fluid that is inserted through the through-hole and sent through a liquid feed pipe built in the workpiece fixing portion, and the workpiece-side surface of the workpiece fixing portion is the workpiece It is characterized in that it is perpendicular to the main axis during machining and is horizontal when the workpiece is detached.

  In such a horizontal machining center, since the workpiece fixing portion is in a (perpendicular) posture orthogonal to the main axis when machining the workpiece, the horizontal force acting during machining can be handled by the table from the back surface of the workpiece. Therefore, the work is not deformed when an excessive stress is applied to the work, and problems such as deterioration of processing accuracy do not occur.

In addition, since the workpiece fixing part is in a horizontal position when the workpiece is attached and detached, the workpiece is fixed by placing the workpiece from above and fixing it with a jig, preventing attachment errors such as dropping the workpiece. It becomes possible to do.
Furthermore, even when a loader is disposed for the purpose of automatically attaching and detaching a workpiece, the entire apparatus can be reduced in size (decrease in the equipment floor area) by arranging the loader above the workpiece fixing portion.

  Further, in the horizontal machining center, the work fixing portion has two tables disposed at positions facing each other with the rotation shaft of the turntable interposed therebetween, and the surface of one of the tables is a rotation shaft of the main shaft. If the surface of the other table is configured to be horizontal when orthogonal to the workpiece, while the workpiece fixed to one workpiece fixing portion is being processed, the workpiece is detached and attached at the other workpiece fixing portion. Work can be performed, and the work time can be shortened.

  In addition, if the horizontal machining center is provided with a cover configured to cover the whole with only the upper part of the turntable opened, the work can be attached and detached without requiring opening and closing of the cover. Is preferable.

Further, in the horizontal machining center, wherein the turntable has a through hole in its central portion, wherein the jig, since it is configured to be controlled by the fluid sent from the through hole, the control of jig NC This can be done automatically by the device.

  Further, in the horizontal machining center, if the turntable is configured to reciprocately rotate 180 °, these pipes can be used even when piping or wiring is used for jig control or the like. And the wiring are not twisted by the rotation of the turntable, which is preferable.

  According to the horizontal machining center according to the present invention, it is possible to prevent a mistake in attaching and detaching a workpiece, and to process a workpiece with higher quality by receiving a horizontal force acting on the workpiece from the back surface of the workpiece.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the drawings. In the description, the same reference numerals are used for the same elements, and duplicate descriptions are omitted.
Here, FIG. 1 is a side view showing the horizontal machining center according to the present embodiment. FIG. 2 is a side view showing a reversing table device in the horizontal machining center shown in FIG. FIG. 3 is a plan view of the reversing table device viewed from obliquely above.

  As shown in FIG. 1, the horizontal machining center MC according to the present embodiment includes a machining apparatus 1 including a main shaft 10 arranged so that the rotation axis C <b> 1 is horizontal, and the rotation axis C <b> 2 as a rotation axis C <b> 1 of the main shaft 10. And a reversing table device 2 having a turntable 20 inclined by 45 °.

  As shown in FIG. 1, the processing device 1 is arranged on the upper surface of the bed 3 so as to be movable in the front-rear and left-right directions. It is an apparatus which performs processing.

  The processing apparatus 1 includes a main shaft 10 that applies a rotational force to an attached tool 11, a column 12 that supports the main shaft 10 horizontally, and that supports movement in the vertical (Y-axis) direction. A movable base 13 that is disposed between the bed 3 and supports the column 12 so as to be movable in the front-rear (Z-axis) direction and the left-right (X-axis) direction. A tool magazine 14 configured to be capable of mounting the tool, and an arm 15 for exchanging the tool 11 mounted on the tool magazine 14 and the tool 11 mounted on the main shaft 10.

That is, the machining device 1 is controlled by an NC device (not shown) to move the spindle 10 back and forth, right and left, up and down, and drive and stop the spindle 10 to machine the workpiece W fixed to the reversing table device 2. Is to do.
Needless to say, the configuration of the processing apparatus 1 is not limited and can be changed according to the processing purpose of the workpiece W, the scale of the horizontal machining center MC, and the like.

As shown in FIG. 1, the reversing table device 2 includes a turntable 20 that is inclined 45 ° with respect to the rotation axis C <b> 1 of the main shaft 10, a drive unit 23 that drives the turntable 20 to rotate, and a turntable 20. And a workpiece fixing portion 21 that is provided and fixes the workpiece W.
The reversing table device 2 is provided with a support table 4 so that the upper surface of the turntable 20 is inclined at 45 ° with respect to the rotation axis C1 of the main shaft 10 held horizontally so that the processing device 1 side is lowered. Fixed to the bed 3.

  As shown in FIGS. 2 and 3, the turntable 20 is a metal member having a predetermined thickness and having a circular shape in plan view. The turntable 20 is formed with a through hole 20a for inserting the liquid feeding pipe 6 (see FIG. 2) in the center. Further, as shown in FIG. 3, a plurality of screw holes h for fixing the work fixing portion 21 are provided on the upper surface of the turntable 20 with a predetermined interval in the circumferential direction (six in this embodiment). Is formed. In addition, the shape, material, etc. of the turntable 20 are not limited and may be set as appropriate.

  The turntable 20 according to the present embodiment is controlled to reciprocate 180 ° by the power of the drive unit 23. In the present embodiment, it is assumed that a servo table in which the turntable 20 is swiveled by a servomotor 23a is used as the reversing table device 2. The driving method of the reversing table device 2 is not limited to that by the servo motor 23a, and may be appropriately selected from known driving methods. In the present embodiment, the turntable is controlled to reciprocate by 180 ° in order to prevent the liquid feeding pipe 6 (see FIG. 2) from being twisted or entangled, but the turntable 20 is not necessarily 180. It is not necessary to reciprocate. For example, it may rotate 180 ° in the same direction.

As shown in FIG. 2, the work fixing portion 21 is a member fixed to the upper surface of the turntable 20, and two tables 21 a and 21 a disposed at positions facing each other across the rotation axis C <b> 2 of the turntable 20. have.
The work fixing portion 21 is formed in a triangular prism shape whose cross section is a right-angled isosceles triangle. The hypotenuse of the right-angled isosceles triangle is on the turntable 20 side, and the axis of the triangular prism is the rotation axis C2 of the turntable 20. It is arrange | positioned so that it may become the direction orthogonal to. And the workpiece | work fixing | fixed part 21 is being fixed to the baseplate 21b fixed to the turntable 20 via fixing screw n1, n1. The base plate 21b is fixed by screwing fixing screws n2 and n2 into screw holes h formed in the turntable 20. In addition, the fixing method of the workpiece | work fixing | fixed part 20 is not limited to the said method, What is necessary is just to select from a well-known method suitably. Further, the method for fixing the base plate 21b to the turntable 20 is not limited.

As shown in FIG. 2, the tables 21a and 21a are arranged in directions orthogonal to each other. And as shown in FIG. 1, when the surface of one table 21a is orthogonal to the rotating shaft C1 of the main axis | shaft 10, it is comprised so that the surface of the other table 21a may become horizontal.
Thereby, when the workpiece W fixed to one table 21a is being processed by the main spindle 10, the workpiece W to be processed in the next operation can be fixed to the other table 21a. At this time, since the other table 21a is held horizontally, it is possible to prevent problems such as dropping the workpiece W during the fixing operation.

  Jigs 22 and 22 for fixing the workpiece W are fixed to the tables 21a and 21a, respectively. The type of the jig 22 is not limited and may be appropriately selected from known jigs. However, in the present embodiment, the jig 22 controlled by hydraulic pressure is used.

The workpiece fixing portion 21 is configured to be hollow inside, and the liquid feeding pipe 6 that is inserted through the through hole 20a of the turntable 20 is configured to be able to be installed. The liquid feeding pipe 6 built in the workpiece fixing portion 21 is connected to the jig 22 so that fluid can be fed to the jig 22.
In addition, the jig | tool 22 can be suitably changed according to the shape etc. of the workpiece | work W which processes.

  As shown in FIG. 2 and FIG. 3, the drive unit 23 includes a servo motor 23 a that applies rotation power of the turntable 20. The servo motor 23a is a motor that is driven and stopped by being controlled by an NC device (not shown), and is arranged in a state of protruding from one corner in a drive unit 23 formed in a box shape. Needless to say, the configuration of the drive unit 23 is not limited.

  The support 4 is fixed to the upper surface of the bed 3 and supports the turntable 20 in a state where the turntable 20 is inclined by 45 ° with respect to the rotation axis C1 of the main shaft 10 held horizontally (the upper surface of the bed 3).

As shown in FIGS. 1 and 2, the support base 4 is inclined such that the upper surface 4a is lowered on the processing apparatus 1 side, and the side view has a substantially trapezoidal shape. In the present embodiment, the upper surface 4a of the support base 4 is configured to be inclined at an angle of 45 ° with respect to a horizontal plane (the upper surface of the bed 3).
As shown in FIG. 2, the support base 4 is fixed to the bed 3 via a plurality of fixing screws n3 and n3. In this embodiment, the fixing screws n3 and n3 are used as the fasteners, but the type and the number of fixing points for fixing the support base 4 are not limited, and the shape of the support base 4 What is necessary is just to set suitably according to a structure etc.

  A fixing plate 4 b for fixing the turntable 20 is integrally formed on the upper surface 4 a of the support base 4. The turntable 20 is fixed to the fixing plate 4b via fixing screws n4 and n4.

  Further, as shown in FIG. 2, the support base 4 is configured so that a liquid feeding pipe 6 can be inserted therethrough, and a through hole through which the liquid feeding pipe 6 is inserted in the center of the fixing plate 4 b of the support base 4. Is formed.

  The liquid feeding pipe 6 is a pipe for feeding a fluid for controlling the jig 22, and feeds the fluid pressure-fed through the liquid feeding pump controlled by the NC device (not shown) to the jig 22. . The liquid feeding pipe 6 is connected to the jig 22 after passing through the support 4, the driving unit 23, the through hole 20 a of the turntable 20, and the work fixing unit 21. The material and inner diameter of the liquid feeding pipe 6 are not limited, and may be appropriately selected from known materials.

  Further, as shown in FIG. 1, the machining center MC includes a cover 5 formed in a box shape so as to cover the processing device 1, the reversing table device 2, the bed 3, and the support base 4. It is possible to prevent foreign matter from entering and scattering of chips and the like generated when the workpiece W is processed. This cover 5 is formed in a state where only the upper part of the turntable 20 is opened, and is configured such that the work W can be attached to and detached from the table 21a without requiring the opening and closing operation of the cover.

  As described above, according to the horizontal machining center MC of the present embodiment, the table 21a, 21a, which is fixed to the upper surface of the turntable 20, and is orthogonal to the workpiece fixing portion 21, is provided, so that one table 21a forms a vertical surface. When the other table 21a forms a horizontal plane and the turntable 20 is rotated 180 °, the other table 21a can be controlled to be a vertical plane and the other table 21a can be controlled to be a horizontal plane. Accordingly, when the workpiece W is fixed to one table 21a and the workpiece W is disposed so that the machining surface of the workpiece W is orthogonal to the main shaft 10, the other table 21a has a horizontal plane. Therefore, according to the horizontal machining center MC of the present embodiment, the work W is fixed while being placed on the horizontal table 21a (the jig 22), so that the work W is dropped. There is no. On the other hand, in the conventional horizontal machining center, since the work is fixed to the vertical surface via the vertical scale, there is a risk that the work will be dropped if, for example, the work is displaced.

  And since the table 21a supports the workpiece W from the back surface of the workpiece W when machining the workpiece W, the table 21a can handle the stress acting on the workpiece W during machining, and the burden on the workpiece W is small. By suppressing the deformation of the workpiece W, precise machining is possible.

  In addition, since the workpiece W can be fixed from above, the loader can be arranged using the space above the horizontal machining center MC, the entire apparatus can be downsized, and the floor area of the facility is reduced. It becomes possible. Therefore, the arrangement in a limited space is possible.

  Further, since two tables 21a for fixing the workpiece W are provided so as to be orthogonal to each other, when the workpiece W fixed to one table 21a is being processed, the workpiece W is attached to and detached from the other table 21a. Since the work can be performed, the cycle time required for continuously processing the workpiece W can be shortened.

  Moreover, since the upper part of the turntable 20 of the cover 5 is opened, there is no need to open and close the cover 5 for attaching and detaching the work W, and the work W fixed to one table 21a is being processed. The work W of the other table 21a can be attached and detached.

  Since the rotation of the turntable 20 is performed via the servo motor 23a, it can be controlled by the NC device, and the work W can be arranged without requiring the skill of the operator.

  Since the jig 22 for fixing the workpiece W is performed by hydraulic pressure that is controlled by the NC device and fed, it is possible to perform from the fixing of the workpiece W to processing and removal completely automatically.

The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and the design of the respective components can be appropriately changed without departing from the spirit of the present invention.
For example, in the above-described embodiment, two tables are arranged. However, it is not always necessary to arrange two tables, and a single product is manufactured instead of processing a plurality of workpieces continuously. In such a case, only one table may be arranged. In this case, the table is horizontally arranged when the workpiece is attached and detached, and when the workpiece is machined, the turntable is rotated by 180 ° so that the workpiece machining surface is perpendicular to the main axis.

Further, the cover does not necessarily have an opening, and the formation of the opening may be set as appropriate.
Further, the through hole of the turntable may be formed as necessary, and the through hole may not be formed when the jig for fixing the workpiece is not controlled by the fluid.

  Further, the turntable does not necessarily need to rotate 180 ° reciprocally. For example, the turntable may rotate only in one direction.

1 is a side view showing a horizontal machining center according to a preferred embodiment of the present invention. It is a side view which shows the inversion table apparatus in the horizontal machining center shown in FIG. FIG. 3 is a plan view of the reversing table device shown in FIG. 2 viewed from obliquely above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Processing apparatus 10 Spindle 2 Reversing table apparatus 20 Turntable 20a Through-hole 21 Work fixing | fixed part 21a Table 22 Jig 3 Bed 5 Cover 6 Liquid feeding pipe MC Horizontal machining center W Workpiece

Claims (4)

A main shaft arranged such that the rotation axis is horizontal;
A turntable rotation axis is inclined 45 ° to the axis of rotation of the main shaft,
A workpiece fixing part fixed to the upper surface of the turntable;
A jig that is disposed in the workpiece fixing portion and fixes the workpiece;
A horizontal machining center comprising:
The turntable has a through hole in the center,
The jig is controlled by a fluid that is inserted through the through-hole and sent through a liquid feed pipe that is built in the work fixing portion,
The horizontal machining center according to claim 1, wherein a workpiece side surface of the workpiece fixing portion is orthogonal to the main shaft when the workpiece is processed, and is horizontal when the workpiece is detached.   When the work fixing part has two tables arranged at positions facing each other across the rotation axis of the turntable, when the surface of one of the tables is orthogonal to the rotation axis of the main shaft, The horizontal machining center according to claim 1, wherein a surface of the table is horizontal.   3. The horizontal machining center according to claim 1, further comprising a cover configured to cover the entire surface with only the upper portion of the turntable opened. 4. The horizontal machining center according to any one of claims 1 to 3 , wherein the turntable rotates reciprocally by 180 degrees.

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