JP2000052168A - Turntable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a turntable wherein a worm shaft for turning a table is easily attached/detached in a direction orthogonal to the axial direction of the worm shaft. SOLUTION: A turntable is constructed in such a manner that in the rear surface of a table main body 9, a worm shaft housing room 41 is formed in the advancing/retreating direction (direction of Z axis) of the turntable, a worm housing 36 having a worm shaft 35 rotatably supported by a bearing 37 is inserted into the worm shaft housing room 41 from the rear side of the table main body 9 in the direction of the Z axis, and fixed by a bolt, and the axis of the worm shaft 35 is offset in the direction of the Z axis with respect to the axis of a turning dividing motor 30.

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 machining center, which is rotatably mounted on a table body which moves in a Z-axis direction (a direction in which the tool moves forward and backward).
The present invention relates to a swivel table for supporting a workpiece on its upper surface and changing its posture.

[0002]

2. Description of the Related Art Conventionally, in a machine tool such as a machining center, a column 4 slides on a bed 1 along a guide rail 2 in an X-axis direction by an X-axis feed motor 3 as shown in FIGS. Then, a spindle head 6 having a tool is vertically slid along a guide rail 5 in front of the column 4 in a Y-axis direction (vertical direction) by a Y-axis feed motor 7 to support a workpiece. Table body 9 on which is mounted
Is in the Z-axis direction along the guide rail 10 by the Z-axis feed motor 11 (perpendicular to the X-axis and in the direction of reciprocation with respect to the tool)
There is a form that moves to. In this type of machine tool, a Z-axis feed motor 11 is disposed immediately below a center position of the table main body 9 in the X-axis direction, and slides the table main body 9 in the Z-axis direction on both sides of the Z-axis feed motor 11. Guide rail 10 is installed. A chip discharge groove 12 is provided on the bed 1 outside the guide rail 10, and a mountain-shaped telescopic cover 19 having a high center is installed on the bed immediately below the processing area, so that the workpiece can be removed during processing. The chips scattered on the bed 1 are mountain-shaped telescopic covers 1
9 and fall into the chip discharge groove 12,
The paper is discharged to the front or rear of the machine tool by a not-shown conveyor or the like.

A turning index motor 14 of the turning table 8 for changing the attitude of the workpiece is mounted on the front surface of the table body 9 and a slide cover 13 is provided above the turning index motor 14.
Covered by Further, in order to prevent chips from flying out of the machine tool, an entire cover 15 is provided along substantially the outer edge of the chip discharge groove 12, and further outside the machine tool, the outside of the machine tool can be easily approached from outside to the machine tool. It is surrounded by an overall cover 15 to prevent it. The worm wheel 16 for turning the turning table 8 is mounted on the table body 9 in the Y direction.
It is inserted from above into a hole formed in the axial direction (vertical direction), and several parts such as a turning shaft are stacked on the upper part, and the turning table 8 is fixed. Worm wheel 1
A worm shaft 17 for meshing with the rotary table 6 and rotating the rotary table 8 is inserted into a hole formed in the Z-axis direction of the table main body 9, rotatably supported by a bearing 18, and fixed to the front end of the table main body 9. It is connected to a turning index motor 14 to turn the turning table 8.

[0004]

In the conventional machine tool, when the worm shaft 17 and the worm wheel 16 are used to a certain extent, the worm shaft 17 and the worm wheel 16 are worn and loose, and the indexing accuracy is deteriorated. Is required. However, the worm shaft 17 is inserted into a hole formed in the Z-axis direction of the table main body 9, and the rotation index motor 1
In order to remove the worm shaft 17 from the table main body 9, the rotary index motor 14, the bearing 18, and other components are sequentially extracted to remove the worm shaft 17 from the worm shaft 1.
Since it is necessary to pull out in the axial direction of 7, there is a drawback that it takes time to disassemble not only at the time of adjustment and replacement, but also at the time of visual inspection of the tooth surface.

The turning index motor 14 of the turning table 8 is mounted on the front surface of the table body 9 and its upper part is covered by a slide cover 13 and its outer part is protected by an entire cover 15, so that maintenance and maintenance can be performed. At the time of replacement, it is necessary to remove the slide cover 13 and the entire cover 15 each time. However, since the slide cover 13 is fixed to the table main body 9 and moves integrally with the swivel table 8, in order to avoid interference with other fixed members such as the whole cover 15 at the time of rest and movement, the assembly accuracy (when moving, Running accuracy) is required, and if the running accuracy when actually moved is poor, there is a problem that an eccentric load acts on the swivel table even if there is no interference with other parts. It is not necessary to pay attention only to interference, and in addition, it is necessary to take measures to prevent the intrusion of coolant such as a packing and a sealing material. In addition, since the entire cover 15 is a large cover for enclosing a wide range, handling is troublesome, and it takes time to attach and detach.

[0006]

In order to solve the above-mentioned problems, a turning table according to the present invention is a turning table which turns to change the attitude of a workpiece supported on an upper surface thereof. Are detachable from the table body in a direction perpendicular to the axial direction of the worm shaft. Further, the worm shaft is detachably attached to the table body via a worm housing, and the worm shaft is offset from the axis of the rotary indexing motor via a plurality of gears. It is characterized by being arranged in.

Further, the swivel table of the present invention is configured to perform processing by moving the tool forward and backward.
The worm shaft is detachable from the table main body in the moving direction of the turning table, and a slide for moving the turning index motor of the turning table with the reciprocating movement of the turning table with respect to the tool. It is characterized in that it is mounted outside the covering area of the cover and the entire cover covering the entire machine tool.

Further, the swivel table of the present invention is configured to perform processing by moving the tool forward and backward.
An opening is formed in the bed of the processing area where the main spindle moves during processing, and an opening communicating with the chip discharge groove is provided, and a chip scattering prevention cover surrounding the processing area is installed along substantially the outer edge of the opening, A slide cover that moves with the reciprocating movement of the swivel table with respect to the tool is mounted on a front surface orthogonal to the moving direction of the swivel table, and a turning index motor of the swivel table is mounted on a surface parallel to the moving direction of the swivel table. In addition, a safety cover for covering the rotation indexing motor is attached to the entire cover.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A swivel table of the present invention is a swivel table for changing the posture of a workpiece supported on an upper surface thereof, and a turning worm shaft is orthogonal to an axial direction of the worm shaft. The worm shaft can be easily attached to and detached from the table body in the direction in which the worm shaft is inserted into the table body in the axial direction of the worm shaft. By attaching the shaft assembled to the worm housing to the table body detachably, assembly and disassembly become easy, and the worm shaft is offset from the axis of the rotary indexing motor via a plurality of gears. By arranging, assembly and disassembly can be further facilitated.

Further, the swivel table of the present invention is configured to perform processing by moving the tool forward and backward.
The worm shaft can be easily attached to and detached from the turning table body in the direction of movement of the turning table, so that the worm shaft can be easily attached and detached. The inspection and replacement of the rotary indexing motor can be facilitated by mounting the slide indexing motor outside the covering area of the slide cover that moves with the movement and the entire cover that covers the entire machine tool.

Further, the swivel table of the present invention is configured to perform processing by moving the tool forward and backward.
An opening is formed in the bed of the processing area where the main spindle moves during processing, and an opening communicating with the chip discharge groove is provided, and a chip scattering prevention cover surrounding the processing area is installed along substantially the outer edge of the opening, Attach a slide cover that moves as the swivel table advances and retreats with respect to the tool, on the front surface that is perpendicular to the direction of movement of the swivel table, and mount the turning index motor of the swivel table on a surface parallel to the direction of movement of the swivel table. Accordingly, the chips generated by the cutting process are discharged from the chip discharge groove via the opening by the chip scattering prevention cover, and the front portion of the turning table is protected from the chips by the slide cover. In addition, since the safety cover that covers the rotation indexing motor is attached to the entire cover, inspection and replacement of the rotation indexing table can be performed only by removing the safety cover, and it is not necessary to remove the slide cover, the entire cover, etc. Will not be.

[0012]

An embodiment of the present invention will be described with reference to FIGS. The basic configuration of the machine tool to which the swivel table of the present invention is applied is the same as that of the above-described conventional example, and the column 4 is moved on the bed 1 along the guide rails 2 and 2 by the X-axis feed motor 3 in the X-axis direction. The spindle head 6 having a cutting tool slides along the vertical guide rails 5 on the front surface of the column 4 and slides in the Y-axis direction (vertical direction) by the Y-axis feed motor 7 to support the workpiece. The table body 9 on which the rotating table 8 is mounted slides along the guide rails 10 and 10 in the Z-axis direction (the direction of reciprocation with respect to the cutting tool) by the Z-axis feed motors 25 and 25. Changing the machining angle position of the workpiece fixed on the turning table 8 by turning the same, moving the turning table 8 forward and backward with respect to the column 4 in the Z-axis direction, and sliding the column 4 in the X-axis direction,
Processing is performed by a rotary tool while the main shaft is slid in the vertical direction (Y-axis direction) of the column 4.

In the machine tool according to the present invention, the table body 9 is fed in the Z-axis direction by two ball screws 20, 20 and two Z-axis feed motors 25, 25, and screwed to the ball screws 20, 20. Ball screw nuts 21 are mounted on support portions 22 on both sides of the table body 9. An opening 23 is formed in the upper surface of the bed 1 (the upper surface of the bed 1 between the table body 9 and the column 4) immediately below the processing area, which is the area where the main spindle moves during processing, and the opening 23 is formed below the bed 1 in the Z-axis direction. It communicates with the extending chip discharge groove 24. Guide rails 10, 10 in the Z-axis direction are provided on the bed 1 on both sides of the opening 23, and ball screws 20, 20 are respectively provided outside the guide rails 10, 20. Z-axis feed motors 25 are provided, respectively. Ball screw nuts 21 and 21 are fixed to support portions 22 and 22 on both side surfaces of the table body 9, and the table body 9 is screwed with the ball screws 20 and 20, respectively.
10 can be slid in the Z-axis direction.

A chip scattering prevention cover 26 is provided substantially at the outer edge of the opening 23, and one end of the cover 26 is formed in a circular shape so as to surround the swivel table 8. The swivel table 8 on the top 9 is configured to be within the range of the chip scattering prevention cover 26. The chip scattering prevention cover 26 includes:
An overall cover 15 surrounding the front of the turntable 8 and the front of the bed 1 is attached. Further, the guide rails 10, 10, the ball screws 20, 20 and the turning index motor 30 in the Z-axis direction outside the coverage of the chip scattering prevention cover 26 and the entire cover 15 are covered from the top, side, and bottom surfaces. A safety cover 27 is attached to the chip scattering prevention cover 26 and the entire cover 15. The column portion of the machine tool is also provided with an overall cover 15 'for preventing access to the machine tool from outside. Winding covers 28, 28 are provided at the lower extension of the chip scattering prevention cover 26, so that the chips guided by the chip scattering prevention cover 26 do not scatter in the lateral direction and are reliably guided to the opening 23. ing. The winding covers 28, 28 have one ends fixed to both sides of the rear end surface (column 4 side) of the table body 9, and the other ends provided below the safety cover 15 ′ on the column 4 side (not shown). The rotating table 8 is configured to be retracted and retracted in the Z-axis direction along the guide rails 10, 10.

A slide cover 13 is attached to the front surface of the table body 9 and moves in the Z-axis direction together with the swivel table 8 to cover the front part of the table body 9. Note that the chip scattering prevention cover 26 and the entire cover 15 are appropriately provided with doors for approaching the workpiece. The chips generated during the cutting process are not scattered outside by the chip scattering prevention cover 26, but enter the chip discharge groove 24 formed inside the bed opening 23,
It is discharged to the column 4 side by an unillustrated conveyor. In addition,
Reference numeral 29 denotes a guide plate for guiding chips provided on the lower surface of the table body 9 from the opening 23 to the chip discharge groove 24.

Next, a description will be given of a turning drive device of the turning table 8 rotatably mounted on the table body 9. A worm wheel 16 for turning the turning table is inserted from above into a hole formed in the center part of the table body 9 in the Y-axis direction (vertical direction), and the worm formed on the worm shaft 35 is engaged with the worm wheel 16. The worm shaft 35 has a bearing 3 in a worm housing 36.
7, 37 'rotatably supported.

A worm shaft accommodating chamber 41 is formed on the rear surface (column side) of the table main body 9 in the reciprocating direction (Z-axis direction) of the swivel table 8.
Is inserted into the worm shaft accommodating chamber 41 in the Z-axis direction from the rear (column side) of the table body 9 and is fixed by bolts. Adjustment of the meshing between the worm shaft 35 and the worm wheel 16 is performed by adjusting a current spacer 39 provided between the worm housing 36 and the bearing housing 38.
The worm shaft accommodating chamber 41 is sealed by a lid 42.

The turning index motor 30 of the turning table 8 is mounted on a surface parallel to the moving direction of the turning table 8, that is, on the right side (or the left side) of the table body 9, and the rotation of the turning index motor 30 is controlled. The power is transmitted to the gear 33 supported by the bearing 32 via the coupling 31 and transmitted to the worm wheel 16 via the gear 34 for reducing the worm shaft 35. The axis of the turning index motor 30 and the axis of the worm shaft 35 are offset in the Z-axis direction, and the worm shaft 35 is in a direction orthogonal to the axis of the worm shaft 35 and the sliding direction (Z The worm housing 36 and the worm housing 36 can be easily assembled and removed from the rear surface of the table body 9 in a direction parallel to the axial direction).

As described above, the slide cover 13 is mounted on the front surface of the table body 9 and moves in the Z-axis direction together with the swivel table 8 so that the table body 9
The front cover of the turntable 8 and the entire cover 15 surrounding the front of the bed 1 are attached. On the back of the bed 1, a chip scattering prevention cover 26 is provided along the opening 23. The safety covers 27 are separately provided so as to cover the guide rails 10, 10 in the Z-axis direction, the ball screws 20, 20, and the indexing motor 30 located outside the two covers. Mounted on

Therefore, since the turning index motor 30 is mounted outside the covering area of the slide cover 13 and the whole cover 15, the maintenance and operation of the turning index motor 30 can be easily performed only by removing the separately fixed safety cover 27. Exchange can take place. The worm shaft 35 is removed by removing the lid 42 of the worm shaft accommodating chamber 41 on the rear surface of the table main body 9 without removing other components such as the indexing motor and the bearing from the table as in the conventional example. The turning table 8 can be attached to and detached from the table body 9 in a direction parallel to the sliding direction (Z-axis direction) of the turning table 8, thereby facilitating adjustment and replacement. Further, the visual inspection of the tooth surfaces of the worm shaft 35 and the worm wheel 16 can be easily performed only by removing the lid 42 of the worm shaft storage chamber 41 on the rear surface of the table body 9.

[0021]

According to the present invention, the turning worm shaft can be attached to and detached from the table body in a direction orthogonal to the axial direction of the worm shaft. Since it can be attached and detached without removing it from the swivel table, adjustment and replacement work is easy, and work efficiency is improved. Further, the visual inspection of the tooth surface can be easily performed only by removing the lid on the rear surface of the turning table, so that the working efficiency is improved. Further, the worm shaft is detachably attached to the table main body via the worm housing, so that the worm shaft is disposed at a position offset from the axis of the rotation indexing motor. Can be attached and detached in the direction of movement of the swivel table, so that adjustment / exchange work becomes easier and work efficiency is improved.

The rotation indexing motor of the turning table is mounted outside the area covered by the slide cover and the entire cover that covers the entire machine tool, so that maintenance and operation of the rotation indexing motor can be performed.
Replacement can be easily performed, and work efficiency is improved. In addition, by attaching the safety cover that covers the rotation indexing motor separately to the entire cover, the rotation indexing motor is normally protected, and maintenance and replacement can be done simply by removing the separately fixed safety cover. Work can be done.

Further, in the swivel table of the present invention, an opening communicating with the chip discharge groove is provided in a bed in a machining area where the main spindle moves during machining, and a chip scattering prevention cover surrounding the machining area is provided at the opening. Installed along substantially the outer edge, a slide cover that moves with the reciprocating movement of the swivel table with respect to the tool is mounted on a front surface that is orthogonal to the moving direction of the swivel table, and the swivel indexing motor is moved in the moving direction of the swivel table. Since the rotary indexing motor is mounted on the parallel surface, maintenance and replacement of the rotation indexing motor can be easily performed.

[Brief description of the drawings]

FIG. 1 is a plan view showing a conventional turning table.

FIG. 2 is a front view showing a conventional turning table.

FIG. 3 is a plan sectional view showing an assembled state of a worm shaft in a conventional swivel table.

FIG. 4 is a plan view showing a swivel table according to the embodiment of the present invention.

FIG. 5 is a front view showing the swivel table according to the embodiment of the present invention.

FIG. 6 is a plan sectional view showing an assembled state of a worm shaft in the swivel table according to the embodiment of the present invention.

[Explanation of symbols]

 1: Bed 4: Column 6: Spindle head 8: Swivel table 9: Table body 16: Worm wheel for swivel table rotation 23: Opening 24: Chip discharge groove 26: Chip scattering prevention cover 27: Safety cover 35: Worm shaft 36: Worm housing 41: Worm shaft housing

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Taiichi Yamaguchi 1-1-1, Asahi-cho, Kariya-shi, Aichi Toyota Machine Works Co., Ltd. (72) Inventor Koji Toyama 1-1-1, Asahi-cho, Kariya-shi, Aichi Toyoda F-term (reference) in Kiki Co., Ltd. 3C011 DD01 3C048 AA01 BB12 DD12

Claims (7)

[Claims] 1. A turning table of a machine tool which turns to change the posture of a workpiece supported on an upper surface thereof.
A turning table, wherein a worm shaft for turning the table is detachable from the table body in a direction orthogonal to an axial direction of the worm shaft. 2. The swivel table according to claim 1, wherein the worm shaft is mounted on the table main body via a worm housing detachable from the table main body. 3. The swivel table according to claim 1, wherein the worm shaft is arranged at a position offset from the axis of the swivel indexing motor via a plurality of gears. 4. The turning table is configured to perform processing by moving forward and backward with respect to a tool, and the worm shaft is detachable from a table body in a direction parallel to a moving direction of the turning table. The turning table according to any one of claims 1 to 3, wherein: 5. A slide for moving a turning index motor of the turning table in accordance with the moving of the turning table with respect to the tool. The swivel table according to any one of claims 1 to 4, wherein the swivel table is mounted outside a covering area of the cover and an entire cover that covers the entire machine tool. 6. The turning table is configured to perform processing by moving forward and backward with respect to a tool, and is formed on a bed in a processing area where a main spindle moves during processing, and communicates with a chip discharge groove. An opening is provided, a chip scattering prevention cover surrounding the processing area is installed along substantially the outer edge of the opening, and a slide cover that moves with the reciprocating movement of the swivel table with respect to the tool is moved with respect to the moving direction of the swivel table. The swivel table according to any one of claims 1 to 5, wherein the swivel table is mounted on a front surface which is perpendicular to the surface of the swivel table, and the swivel index motor of the swivel table is mounted on a surface parallel to a moving direction of the swivel table. 7. The swivel table according to claim 5, wherein a safety cover for covering the swivel index motor is attached to the entire cover.