JPH0671675B2 - Work table in thermal cutting machine - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work table in a thermal cutting machine such as a laser beam machine or a plasma cutting machine. More specifically, the present invention relates to a needle table for supporting a work. The present invention relates to a work table that can easily carry in and out a work despite having a supporting member.

(Prior Art) As a heat cutting machine, for example, in a laser processing machine, a plate-like work is moved and positioned in the X and Y axis directions with respect to a processing head provided at a predetermined position, and is fixed on a table. A type in which the machining head moves in the X and Y axis directions with respect to the workpiece,
There is a type in which one of the work and the working head moves in the X-axis direction and the other of the working head and the work moves in the Y-axis direction.

(Problems to be solved by the invention) For example, in a thermal cutting machine such as a laser processing machine, safety is required so that a laser beam applied to a supporting member that supports a work is not reflected in the direction of an operator. In consideration of the processing precision and the like when processing the portion supported by the support member, a structure in which the work is supported by a needle-shaped support member is adopted.

In the configuration in which the work is supported by the needle-shaped support member as described above, there is a problem that the lower surface of the work is easily scratched when the work is carried in and out of the table. Therefore,
A configuration has also been developed in which a large number of balls that can be projected and retracted relative to the upper end of the needle-like support member are provided, and the balls support the work so that the work can be carried in and out of the table. .

However, in the conventional configuration, when the cut piece cut and separated from the work is carried out together with the work, the cut piece may slightly descend from the work and come into contact with the needle-shaped support member. As a result, the work could not be carried out from the table.

(Means for Solving the Problems) In view of the conventional problems as described above, the present invention provides the base of the thermal cutting machine on the upper surface of the tilt table that is tiltably supported so that the rear side is higher than the front side. A plurality of beam members extending in the front-rear direction are provided to be supported at appropriate intervals in the left-right direction, and a plurality of needle-shaped support members for supporting the work are erected on the respective beam members and vertically moved relative to the tilt table. A plurality of work supporting beams extending in parallel with the beam members are provided on a freely supported lifting frame at appropriate intervals in the left-right direction, and the top and bottom of the work supporting beam is moved upward and downward by the needle supporting member. To the rotary shaft which is provided so as to be retractable relative to the upper end of the shaft, extends in the left-right direction below the beam members and the work support beams, and is rotatably supported by the tilt table. When a plurality of work support members extending in a direction orthogonal to the axis of the shaft are provided at appropriate intervals in the left-right direction, and each work support member is brought into a vertical standing state by the rotation of the rotation shaft. The tip end portion of each work supporting member projects higher than the work supporting beam at the top dead center to support the work.

(Operation) In the above configuration, the tip of the work supporting member is projected higher than the work supporting beam at the top dead center to support the work, so that the work is supported without contacting the work supporting beam or the needle-shaped supporting member. It can be easily carried in and moved onto the table.

A state in which the work is supported by the work supporting member, the work is carried in and positioned with respect to the work table, and then the turning shaft is turned to turn down the tip of the work supporting member, and the tip is raised to the maximum. The work is supported by the support beam when the work is immersed from the work support beam at the top dead center.

After the work supporting beam supports the work, the elevating frame is lowered and the work supporting beam is retracted from the upper end portion of the needle-shaped supporting member, so that the work is supported by the plurality of needle-shaped supporting members.

As described above, when the work is supported by the plurality of needle-shaped support members, the work is subjected to thermal cutting processing so that the laser beam is reflected in the direction of the operator even when the laser beam is applied to the needle-shaped support member. The heat cutting process can be safely performed without such a situation.

After the thermal cutting of the work, the lifting frame is raised to raise the work supporting beam again higher than the upper end portion of the needle-shaped supporting member, so that the work and the cut pieces separated from the work become the work supporting beam. Supported.

After that, by tilting so that the rear side of the tilting table becomes higher, the work and the cut pieces on the work supporting beam slide down to the front side and are carried out.

(Example) Referring to FIG. 1 to FIG. 3, it is provided on a base 1 (see FIG. 2A) in a thermal cutting machine (overall configuration is not shown) such as a laser processing machine and a plasma processing machine. Further, the tilt table 5 is supported by the bracket 3 so as to be tiltable so that the rear side (the right side in FIG. 2A) becomes higher.

More specifically, as shown in FIG. 1, the tilting table 5 includes frame bodies 7A, 7B, 7C, 7D such as square pipes in the left-right direction (in the vertical direction in FIG. 1) rather than in the front-back direction. The same) (left-right direction) is a long rectangular combination, and the auxiliary frames 9A, 9B, which extend in the front-rear direction, are provided in the vicinity of the left and right central portions of the front and rear frames 7B, 7D and the left and right sides thereof. 9C is attached integrally.

As shown in FIG. 2A, bearing blocks 11 are provided at substantially central portions of the lower surfaces of the auxiliary frames 9B and 9C, and each bearing block 11 is a pivot shaft provided on the bracket 3 of the base 1.
The rear side (right side in FIG. 2A) is supported via 13 so as to be inclined.

An upper end of an upper link 15U is pivotally attached to a lower portion of the auxiliary frames 9C and 9B at a position forward of the pivot 13 via a pin 17, and a lower end of the upper link 15U is attached via a pin 19. Lower link 15L whose lower end is supported by bracket 3
Is pivotally connected to the upper end of the pin via a pin 21. And
The tip of a reciprocally movable piston rod 25 in a fluid pressure cylinder 23, which is swingably supported by the bracket 3, is also pivotally attached to the pin 21.

With the above configuration, the tilt table 5 is moved by expanding and contracting the piston rod 25 in the fluid pressure cylinder 23.
It is tiltable about a pivot 13 so that the rear side is higher and the front side is lower from a horizontal state.

As shown in FIG. 1, brackets 26 (see FIG. 2) are provided on the upper surfaces of the front and rear frames 7B and 7D of the tilt table 5.
A plurality of beam members 27 extending in the front-rear direction are supported in the left-right direction at appropriate intervals. Then, each beam member 27
A plurality of needle-shaped support members 29 for supporting a plate-shaped work (not shown) are arranged upright in the front-back direction. The needle-shaped support member 29 horizontally supports the work when the work is heat-cut.

A work piece after being subjected to a thermal cutting process supported by the needle-like support member 29 and a cut piece cut and separated from the work piece,
A work support beam 31 that lifts up from the needle-shaped support member 29 and supports it is provided so as to be vertically movable relative to the needle-shaped support member 29.

More specifically, the frame 7A of the tilt table 5
An elevating frame 35, which is a combination of the frame bodies 33A to 33D in a rectangular shape, is supported on the outer side of the to 7D so as to be vertically movable. Then, as shown in FIG. 1, front and rear end portions of the plurality of work supporting beams 31 extending in the front-rear direction are supported by the front and rear frame bodies 33B, 33D of the elevating frame 35 in the left-right direction at appropriate intervals. ing.

In the present embodiment, the cross-sectional shape of the work supporting beam 31 is, as shown in FIG. 3, a groove-shaped steel-like shape that covers the beam member 27 from the upper side, and the needle-like shape is provided on the upper side. A through hole is provided so that the support member 29 can penetrate therethrough.

The workpiece support beam 3 with respect to the needle-shaped support member 29 and the like.
1. In order to move the elevating frame 35 up and down, a plurality of (two) rotating shafts 37 (see FIG. 2A) extending in the front-rear direction are provided on the lower surfaces of the front and rear frames 7B, 7D of the tilt table 5. ) Are rotatably supported at the front and rear ends via bearings 39.

An arm 41 (see FIG. 2B) is attached to both ends of the rotating shaft 37, and the tip end of the arm 41 is attached to the lower surfaces of the front and rear frames 33B and 33D of the elevating frame 35. A support roller 45 which is rollable along the guide member 43 is attached.

In addition, in order that the lifting frame 35 may move up and down smoothly,
Guide blocks 47 are attached to the front and rear frames 7B and 7D of the tilt table 5 at a plurality of positions, and the guide blocks 47 allow the guide blocks 47 to move up and down at a plurality of positions of the front and rear frames 33B and 33D of the elevating frame 35. Guide bar to be guided
49 is installed vertically.

In order to rotate the rotating shaft 37 so as to move the elevating frame 35 up and down, as shown in FIG. 3, a symmetrical hydraulic cylinder 51 is provided. As shown in FIG. 3, one end side of each fluid pressure cylinder 51 is pivotally attached to a bracket 53 provided on the lower portion of the auxiliary frame 9A via a piston 55, and reciprocates to each fluid pressure cylinder 51. Freely equipped piston rod
The front end of 57 (one is not shown) is pivotally connected to the front end of a link 59 integrally attached to each of the rotating shafts 37 via a pin 61.

An arm 63 is provided at the other end of each rotary shaft 37 as shown in FIG. 4, and the tip end of each arm 63 is a turnbuckle so as to synchronize each rotary shaft 37. They are connected to each other by a connecting rod 65.

With the above configuration, when the fluid pressure cylinder 51 is operated and the piston rod 57 is reciprocally operated, each rotary shaft is connected via the link 59.
The rotation shaft 37 is rotated, and the rotation shafts 37 are synchronized with each other via the connecting rod 65. Then, each arm 41 attached to each rotation shaft 37 is
The state changes appropriately between a tilted state and a substantially vertical upright state.

Therefore, the support roller 45 provided at the tip of each arm 41
The elevating frame 35 is moved up and down with respect to the tilt table 5 via the.

As described above, when the arms 41 are upright and the elevating frame 35 is raised, the work support beam 31 is raised above the upper end of the needle-shaped support member 29 (see FIG. 3). (Indicated by a line), when the arm 41 is appropriately inclined, the elevating frame 35 descends,
The work supporting beam 31 is in a state of descending from the upper end portion of the needle supporting member 29, and the upper end portion of the needle supporting member 29 is relatively projected with respect to the work supporting beam 31.

The tilt table 5 supports the work at a position higher than the needle-shaped support member 29 and the work support beam 31 so that the work can be easily loaded regardless of the needle-shaped support member 29 and the work support beam 31. Flexible work support member 67
Is provided.

That is, the left and right frame bodies 7C, 7 of the tilt table 5
A plurality of rotating shafts 69 that pass below the beam member 27 and extend in the left-right direction are rotatably supported by A and the auxiliary frame body 9A via bearings (not shown). Although the rotary shaft 69 is divided into right and left parts in the auxiliary frame 9A portion, they are connected to each other through an appropriate coupling.

Then, as shown in FIG. 5, the work support members 67 extending in the direction orthogonal to the axis of the rotating shaft 69 are appropriately attached to the rotating shafts 69 in the axial direction of the rotating shaft 69. Balls 71, which are provided at intervals, are rotatably provided at the tips of the respective work supporting members 67 so as to movably support the work.
In addition, each of the rotating shafts 69 has an absorption member 73 that absorbs the laser beam, for example, when the laser beam is irradiated.
Is provided.

In order to rotate the rotating shaft 69, as shown in FIG.
An appropriate rotary actuator is attached to one end of each rotary shaft 69.
75 is attached. Note that, for example, in the case of a structure in which the respective rotary shafts 69 are linked and connected by a chain, a sprocket, etc.
Only one rotary actuator is required to rotate each rotary shaft 69.

Each of the rotary shafts 69 is rotated by 180 ° by operating the rotary actuator 75, and each work support member 67 attached to each rotary shaft 69 is rotated by the rotary shaft 69. As shown in FIG. 5, it changes between a state in which it is suspended from the rotary shaft 69 and a state in which it stands upright vertically.

Then, when the work supporting member 67 is upright,
The ball 71 provided at the tip is positioned higher than the needle-shaped support member 29 and the work support beam 31, and movably supports the work.

Therefore, by holding the work supporting member 67 in the upright state, it is possible to easily carry the work onto the tilt table 5 without contacting the needle-shaped supporting member 29 or the work supporting beam 31.

As described above, the work is supported by the work supporting member 67, and the work is carried onto the tilting table 5. Then, the rotary actuator 75 is operated to rotate the rotating shaft 69, and the work supporting member 67 is rotated and lowered. The work supported by the work support member 67 is delivered to and supported by the work support beam 31 in a raised state.

When the work supporting beam 31 supports the work as described above, when the fluid pressure cylinder 51 is operated to lower the elevating frame 35, the work supporting beam 31 is lowered from the needle-shaped supporting member 29, so that the work is It is supported horizontally on the needle-shaped support member 29.

As described above, when the work is supported on the needle-shaped support member 29, for example, by irradiating the work with a laser beam from the laser processing head to cut the work, laser cutting can be safely performed as in the conventional case. It can be carried out.

After the thermal cutting of the work is completed, the fluid pressure cylinder 51
When the elevating frame 35 is lifted by operating the work, the work supported by the needle-shaped supporting member 29 and the cut pieces separated from the work are separated by the work-supporting beam 31.
Lifted from 29 and supported.

Therefore, when the work support beam 31 is in a state of supporting the work etc. after the thermal cutting, the fluid pressure cylinder 23 is operated and the rear side of the tilt table 5 is tilted so that the work support beam 31 is raised. The work, etc., slides down to the front and is discharged. After that, the tilt table 5 is returned to the original horizontal state by operating the fluid pressure cylinder 23 in the reverse direction.

When the cutting piece cut and separated from the work is small, it falls from between the work supporting beams 31, so that the falling small cutting piece can be easily taken out,
In the present embodiment, the frame body of the tilt table 5
A hopper 77 (see FIG. 2A) is provided inside 7A to 7D,
The opening at the bottom of the hopper 77 is provided so as to face the shooter 79 that is provided on the base 1 in an inclined manner. A drawer-type receiver 81 is provided below the shooter 79.

Therefore, the small cut pieces cut and separated from the work are stored in the receiver 81 via the hopper 77 and the shooter 79. Therefore, for example, spatter or the like generated during the thermal cutting of the work does not directly adhere to the small cut piece.

As described above, before the work is carried onto the tilt table 5 and the heat cutting process of the work is performed, the work is positioned at the origin position and fixed in the immovable state. (See FIG. 1) and a plurality of work clamps 85 are provided. The constructions of the pull-in clamp 83A, the work clamp 85, and the like are already well-known constructions, and detailed description thereof will be omitted.

(Effects of the Invention) As can be understood from the above description of the embodiments, according to the present invention, it is possible to easily carry a work into the inclined table, and at the time of heat cutting the work, the needle-shaped support member. Therefore, the work can be supported, and the heat cutting of the work can be safely performed.

Further, after the heat cutting process of the work piece is finished, the work and the cutting piece are lifted from the needle-like support member, and then the work table and the like are slid down by inclining the tilt table, so that the work and the like can be easily carried out. ， It can be done surely.

[Brief description of drawings]

 FIG. 1 is a plan view showing an embodiment of the present invention. FIG. 2A is a right side sectional view of FIG. FIG. 2B is a right side view of a part of FIG. 2A. FIG. 3 is a sectional view taken along the line III-III of FIG. FIG. 4 is a sectional view taken along the line IV-IV in FIG. FIG. 5 is an explanatory view of the work supporting member. (Explanation of symbols) 5 ... Tilt table, 23 ... Fluid pressure cylinder 29 ... Needle-like support member, 31 ... Work support beam 35 ... Lifting frame, 51 ... Fluid pressure cylinder 67 ... Work support member, 69 …… Rotating axis

Claims (1)

[Claims] 1. A plurality of beam members (27) extending in the front-back direction are provided on the upper surface of a tilting table (5) which is tiltably supported by a base (1) of a thermal cutting machine so that the rear side is higher than the front side. A plurality of needle-like support members (2) for supporting the work on each beam member (27).
A plurality of work supporting beams (31) extending parallel to the beam members (27) are provided on an elevating frame (35) which is erected on a tilt table (5) and is vertically movable relative to the tilt table (5).
Are provided at appropriate intervals in the left-right direction, and the upper surface of the work supporting beam (31) is provided so as to be capable of projecting and retracting relative to the upper end of the needle-shaped supporting member (29) by the vertical movement of the lifting frame (35) A rotating shaft (69) extending in the left-right direction below the beam members (27) and the work supporting beams (31) and rotatably supported by the tilt table (5),
A plurality of work support members (67) extending in a direction orthogonal to the axis of the rotation shaft (69) are provided at appropriate intervals in the left-right direction, and each work support member is rotated by the rotation of the rotation shaft (69). When the (67) is in a vertical standing state, the tip of each work supporting member (67) projects higher than the work supporting beam (31) at the top dead center to support the work. The work table in the thermal cutting machine.