JPH0360946A - Working device having working exchange device - Google Patents

Abstract

PURPOSE:To reduce bending of a lateral girder and to improve machining precision by a method wherein a cavity and a cylinder are positioned to the center of the rotary table of a working device to exchange a work between the inside and the outside of a plurality of stays, and stays for the lateral girders are erected on a ground in a manner to extend through a cavity in the cylinder. CONSTITUTION:A rotary table 22 rotated around a vertical axis is situated below lateral girders 11 and 12 between two stays 10 erected on a ground, and a plurality of support surfaces on which a work is placed are formed on the rotary table 22. Further, a cavity is formed at the rotation center of the rotary table 22, a cylinder 41 is erected on the rotary table 22 around the cavity. A cover 43 extending radially of the rotary table 22 from the cylinder 41 is located in a position except the support surface on the rotary table 22. An auxiliary stay 50 for supporting the lateral girders 11 and 12 is erected on a ground in a manner to extend the cylinder 41 and the cavity of the rotary table 22. When through movement of a moving table 15, a machining work is applied on a work by means of a laser torch 18, light, refuse, gas, produced during a work are shielded by means of the cover 43 and the cylinder 41.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a working device equipped with a workpiece exchange device that exchanges workpieces between the inside of a plurality of columns and the outside of a plurality of columns. .

<Prior art> A laser processing machine, which is an example of a working device, has four pillars arranged at the four corners, cross beams span these pillars, and a movable table can be moved horizontally on the cross beams. A laser torch is provided on this movable table, and a workpiece placed inside the plurality of supports is cut by laser light emitted from the laser torch. When simultaneously exchanging processed workpieces placed inside a plurality of columns and unprocessed workpieces placed outside a plurality of columns, a method using a pallet exchange device used in a machining center may be considered.

<Problems to be Solved by the Invention> When the turning radius of the pallet exchange device is large, it is necessary to increase the interval between the two supports, and as a result, when the moving platform is moved to the center of the two supports, the crossbeam There is a problem that the bending becomes large and the machining accuracy deteriorates.

<Means for Solving the Problems> The present invention has been made to solve the above-mentioned problems, and includes a rotating table that rotates around a vertical axis between two columns and below a crossbeam. A plurality of support surfaces are formed on the table to place the workpiece, a cavity is provided at the center of rotation of the rotary table, a cylinder is erected on the rotary table around this cavity, and the tube extends in the direction of the rotation radius of the rotary table. A cover extending over the rotary table is erected at a position excluding the support surface, and a sub-supporting column for supporting the cross beam is installed on the ground through the tube and the cavity of the rotary table.

<Operation> By moving the moving table, work is performed on the workpiece using a tool. Light generated during work.

Dust, gas, etc. are blocked by the cover and cylinder. When the work is completed, the cover rotates together with the turntable, and the workpieces that were inside the multiple pillars are moved to the outside of the multiple pillars, and conversely, the workpieces that were outside the multiple pillars are moved to the inside of the multiple pillars. do.

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

In FIGS. 1 and 2, 1o is a pillar placed at the four corners and erected on the ground. The interval between the two columns 10 on the front side is set to be larger than the interval between the two columns 1o on the rear side. A long crossbeam 11 is spanned between the two columns 10 on the front side, and a short crossbeam 2 is spanned between the two columns IQ on the back side, and the long crossbeam 11 and the short crossbeam 12 are used for connection. They are connected by crossbeams 13. A rail 14 is installed on the long cross beam 11 and the short cross beam 12, and a movable platform 15 is guided and supported on the rail 14 so as to be movable in the longitudinal direction of the long cross beam 11. A movable table 16 is guided and supported on the movable table 15 so as to be movable in a horizontal direction perpendicular to the moving direction of the movable table 15, and an elevating table 17 is supported on the movable table 16 so as to be movable in the vertical direction. A laser torch 18 is attached to the lifting table 17 so as to be rotatable about a vertical axis and a horizontal axis. Said moving table 15. The movable table 16 and the like are driven by a servo motor of a circuit.

A support stand 20 is installed on the ground below the long crossbeam 11 at the center of the two pillars 10 on the front side, and a rotary stand 22 is supported by this support stand 20 via a bearing 21 so as to be rotatable around a vertical axis. ing. The support table 20 and the rotary table 225 are aligned so that the center of rotation of the rotary table 22 is at the center of the two columns 10 on the front side and below the long crossbeam 11! l< installed. A cavity 23 is provided in the support base 20 and the rotary base 22 at the center of rotation of the rotary base 22. The rotary table 22 has two
Two pallets 24 are fixed, and each pallet 24 is formed with a support surface 25 for supporting a workpiece W. Support stand 2
A bracket 26 is attached to 0 so as to extend in the radial direction, and a conical roller 27 that supports the periphery of the rotary table 22 is attached to the bracket 26. A support plate 30 is mounted on the bracket 26, and a sprocket 31 that rotates around a vertical axis and a motor 32 that rotationally drives the sprocket 1-31 are installed on the support 30. A chain 33 that meshes with a sprocket 31 is attached to the periphery of the rotary table 22 over approximately 210 degrees. A retaining member 35 having a knock hole 34 is attached to the lower surface of the rotary table 22, and a knock cylinder device 36 that fits into the knock hole 34 is provided on the bracket 26. A workpiece exchange device for exchanging workpieces is mainly composed of a support table 20, a rotary table 22, a motor 32, a knock cylinder device 36, and the like.

On the rotary table 22 around the cavity 23 of the rotary table 22, a fourth
As shown in the figure, the first support frame 4 is circular in plan view.
0 is attached to the first support frame 40, and a circular cylinder 41 formed by connecting two semicircular frames is attached to the first support frame 40. The base frame of the cylinder 41 has a flange portion 42 extending in the radial direction.
are integrally formed, and a movable cover 43 made of acrylic is attached to the flange portion 42 so as to be sandwiched therebetween. A first protection frame 44 having a U-shaped cross section is fitted into the upper part of the cylinder 41. The movable cover 43 has a support surface 25
A second support frame 45 is attached to the lower part of the movable cover 43, and the second support frame 45 is attached on the rotation table 22. . A second protection frame 46 having a U-shaped cross section is fitted into the upper part of the movable cover 43.

An auxiliary strut 50 is attached to the lower surface of a long crossbeam 11 at the center of the two front struts 10, and this auxiliary strut 50 is erected on the ground through the tube 41 and the cavity 23.

On the lower surface of the long crossbeam 11, as shown in FIG.
The third support frame 51 is attached at a position other than 0, and the third support frame 51 is attached at a position other than 0.
A fixed cover 52 is attached to the support frame 5I in such a manner that it is inserted into the support frame 5I. A third protection frame 53 having a U-shaped cross section is fitted into the lower part of the fixed cover 52.

The second protection frame 46 and the third protection frame 53 face each other with a gap in the vertical direction. Both ends of each fixed cover 52 are attached to the auxiliary column 50 and the column 10 via a fourth support frame 54.

Next, the operation will be explained based on the above-described configuration.

The laser torch 18 is moved by moving the movable table 15, the movable table 16, etc., and the workpiece W placed on the pallet 25 is processed into a predetermined shape by the laser beam irradiated from the laser torch 18. The laser light generated at this time is blocked by the fixed cover 52 and the movable cover 43 and does not enter the eyes of the worker standing on the side of the pallet 24 outside the plurality of supports 10. Multiple pillars 10 during laser processing
The processed work W is removed and the unprocessed work W is set on the outer pallet 24. When the machining is completed, the laser torch 18 rises to a position where it does not interfere with the movable cover 43, and the knock cylinder device 3 is inserted through the dowel hole 34.
6 knocks.

When the motor 32 is driven in this state, the rotary table 22 moves to 18
After rotating 0 degrees, the workpiece W that was outside the plurality of columns 10 moves to the inside of the plurality of columns 10, and the workpiece W that was inside the plurality of columns 10 moves to the outside of the plurality of columns 10.

Further, the knock cylinder device 36 is operated to insert a knock into the knock hole 34, and the angle of the rotary table 22 is fixed.

In this way, since the movable cover 43 does not need to be opened and closed in the vertical direction, the time for opening and closing the cover 43 can be reduced to zero, and the cycle time can be shortened.

In addition, since the sub-pillar 54 can be erected at the center of rotation of the rotary table 22, the deflection of the long cross beam 11 can be reduced.

In the above-described embodiment, the workpiece exchange device is applied to a laser processing machine, but it can also be applied to a water jet processing machine, a spot welding machine, or the like.

<Effects of the Invention> As described above, the present invention provides a rotary table that rotates about a vertical axis between two columns and below a crossbeam, and a plurality of support surfaces on which a work is placed on the rotary table. A cavity is provided at the rotation center of the rotary table, a cylinder is erected on the rotary table around this cavity, and a cover extending from the cylinder in the direction of the rotation radius of the rotary table is placed on the rotary table to support the support surface. erected in the removed position,
Since the sub-pillar supporting the cross beam is installed on the ground through the tube and the rotary table cavity, light generated during work,
Dust, gas, etc. can be blocked by the cover and tube.

Furthermore, since the turntable can be rotated without raising the cover, cycle time can be shortened. Furthermore, since the struts that support the crossbeams can be erected on the ground through the cylinders and the cavity, the deflection of the crossbeams can be reduced and work accuracy can be improved.

[Brief explanation of drawings]

Fig. 1 is a front view of a working device equipped with a workpiece changing device according to the present invention, Fig. 2 is a view taken in the direction of the ■ arrow in Fig. 1, and Fig. 3 is a cross-sectional view taken along the line , 4th
The figure is a cross-sectional view taken along the line IV-IV in FIG. 2. 10... Support column, 11.12... Cross beam, 15... Moving table, 18... Laser torch (tool), 20... Support stand, 22... Turning table, 25... Support Face, 31...
・Sprocket, 32...Motor, 33...Chain, 41...Cylinder, 43...Movable cover, 50...
Secondary pillar.

Claims (1)

[Claims] (1) A plurality of pillars are arranged at the four corners and erected on the ground, a cross beam is spanned over these pillars, a movable platform is supported on the cross beam so as to be movable in the horizontal direction, and the inside of the plurality of pillars is In this working device, a tool for performing work on a workpiece placed on a workpiece is installed on the movable platform, and a rotary table that rotates about a vertical axis between two supports and below a cross beam is provided, and a rotary table is provided on the rotary table. A cover that forms a plurality of support surfaces on which workpieces are placed, provides a cavity at the center of rotation of the rotary table, a cylinder is set up on the rotary table around this cavity, and extends from the cylinder in the direction of the rotation radius of the rotary table. is erected on a rotary table at a position excluding the support surface, and a sub-supporting column for supporting the cross beam is installed on the ground through a cavity of the cylinder and the rotary table. Device