JP7236368B2 - Work support used for work support table and heat processing machine - Google Patents

Description

The present invention relates to a work support used in a work support table and a heat processing machine.

Conventionally, the work support table of a thermal processing machine such as a laser processing machine or a plasma processing machine has a plurality of plate-shaped work supports (workpieces) as support members that support the sheet metal (work) to be processed from the bottom surface. support members) are provided. The plurality of work supports are arranged side by side at predetermined intervals on the work support table with their plate surfaces perpendicular to the floor surface.

As one form of the above-described work support, there is one in which a continuous triangular projection is formed on the upper end. When a work to be machined is placed on a work support table on which a plurality of such work supports are arranged, the protrusions on the upper end of each work support come into contact with the lower surface of the work, and the work is point-supported at a plurality of points. be done. Since the work is point- supported and the contact area between the work and the work support is minimized, welding of the work and the work support due to thermal processing, deposition of spatter on the work support, and It is possible to suppress the occurrence of breakage or the like. Work supports are often made of metal as a material that does not burn with laser beams and can be replaced at low cost.

Japanese Patent Application Laid-Open No. 2001-314998

However, even if the work is point-supported as described above, it is impossible to completely avoid wear and damage to the projections of the work support due to thermal processing. In other words, since both the metal work support and the work are metal, the metal melted during processing of the work and the work support may be metallically bonded, or the work support itself may be melted by the laser beam. cannot be prevented. Therefore, it is necessary to replace the work support with a new one every time it is used for a predetermined period (for example, about one month).

SUMMARY OF THE INVENTION An object of the present invention is to provide a work support and a thermal processing machine for use in a work support table, which are excellent in durability.

The present invention provides a work support for use in a work support table , which is formed of carbon fibers having a plurality of different directions, and the directions of the carbon fibers are oblique to the long side and short side directions. offer.

In addition, the present invention provides a work support which is formed in a long plate-like shape from a plurality of carbon fibers of different directions , and which is formed so that the direction of the carbon fibers is oblique to the directions of the long side and the short side. provides a thermal processing machine installed on a work support table in a state in which the long side of the work support is curved in a state perpendicular to the floor surface.

In addition, the present invention is formed of carbon fibers in a plurality of different directions, the direction of the carbon fibers is formed obliquely with respect to the long side and short side directions, and another plate-shaped member is crossed and fitted. To provide a heat processing machine in which a plurality of work supports provided with slits for inserting are combined in a mesh form and installed on a work support table.

According to the present invention, it is possible to provide a work support used for a work support table and a heat processing machine that are excellent in durability.

1 is an external perspective view showing a thermal processing machine using a work support of one embodiment; FIG. FIG. 4 is an external perspective view showing an arrangement state of a work support according to one embodiment; FIG. 4 is a front view showing the shape of a first shape work support 21-1 in one embodiment. FIG. 10 is a diagram showing a state in which protrusions are damaged when the weaving direction of the first shape work support 21-1 matches the longitudinal direction of the protrusions in one embodiment. FIG. 4 is a diagram showing a state in which a first shape work support 21-1 in one embodiment is cut out from a flat-woven carbon fiber thin plate. FIG. 10 is a diagram showing a state in which the projection is damaged when the weaving direction of the first shape work support 21-1 is oblique to the projection in one embodiment. When the protrusion 211 of the work support 21-1 of the first shape in one embodiment is (a) a triangle with a vertex angle of 30°, (b) a triangle with a vertex angle of 60°, ( c) A diagram showing the shape of a triangle with apex angles of 90°. FIG. 10 is a front view showing the shape of a second shape work support 21-2 in one embodiment. FIG. 10 is a diagram showing a state in which the protrusion near the center is damaged when the weaving direction of the second shape work support 21-2 matches the longitudinal direction of the protrusion. FIG. 10 is a diagram showing a state in which the vicinity of the end of the projection is damaged when the weaving direction of the second shape work support 21-2 matches the longitudinal direction of the projection in one embodiment. FIG. 10 is a diagram showing a state in which the vicinity of the end of the projection is damaged when the weaving direction of the second shape work support 21-2 is oblique to the projection in one embodiment. FIG. 10 is a diagram showing a shape of a first shape work support 21-2 in which the projection 212 of the first embodiment is trapezoidal with both upper and lower ends angled at 135°. (a) shows the projection when the weaving direction of the third shape work support 21-3 in one embodiment matches the longitudinal direction of the projection, and (b) shows the projection shown in (a) being damaged. It is a figure which shows the state which carried out. (a) to (d) are front views showing the shapes of work supports 21-4a to 21-4d provided with slits for intersecting each other, respectively, in another embodiment. FIG. 11 is a top view showing a state in which work supports 21-4a to 21-4d are combined in a mesh form in another embodiment;

Hereinafter, a laser processing machine, which is a thermal processing machine provided with a work support used for a work support table according to one embodiment, will be described with reference to the accompanying drawings.

A laser processing machine 1 according to this embodiment performs cutting processing, and as shown in FIG. A plurality of work supports 21 are arranged in the X direction within the work support table 20 . The material and shape of each work support 21 will be described later.

The laser processing machine 1 includes a gate-shaped frame 30 arranged to straddle a work support table 20 . The frame 30 has side frames 31 and 32 and an upper frame 33 .

A carriage 40 movable in the Y direction is provided in the upper frame 33 . A laser head 41 for emitting a laser is attached to the carriage 40 . The laser head 41 is configured to move arbitrarily in the X and Y directions above the workpiece W by moving the frame 30 in the X direction and the carriage 40 in the Y direction.

An NC device 50 for controlling the laser processing machine 1 is attached to the frame 30 . The NC device 50 controls the laser processing machine 1 according to processing data (NC data) for processing the work W. The NC device 50 is a control device that controls the laser processing machine 1 .

The work W is cut by irradiating the work W with laser while the laser head 41 moves in the X direction or the Y direction under the control of the NC device 50 .

The work support 21 installed on the work support table 20 will be described. Each work support 21 is formed by cutting out a thin plate in which a string-like carbon fiber, for example, a carbon fiber reinforced carbon composite material (C/C composite material) is plain woven, into a long shape. Plain weave is a weaving method in which fibers are crossed vertically and horizontally one by one.

The carbon fiber has a melting point of 3550°C, which is much higher than the 1580°C melting point of a general metal workpiece W. Therefore, by using carbon fiber as the material of the work support 21, it is possible to prevent welding between the work W and the work support 21 due to laser beam irradiation when the work W is cut. In addition, since the spatter scattered during the cutting process hardly adheres to the work support 21, it is difficult for it to accumulate.

In addition, since the C/C composite material is fiber-reinforced by impregnating the woven carbon fibers with various substances, elasticity is generated by forming the material into a thin plate. Utilizing this, the work support 21 is bent in an S-shape with its plate surface perpendicular to the floor, as shown in FIG. It is installed in the table frame 22 of both ends.

By setting the work support 21 in a curved state, continuous irradiation of the laser beam to the upper part of the work support 21 when the work W is cut in a straight line is avoided, and spattering is prevented. Deposition and breakage of the work support 21 are suppressed.

As specific examples of the shape of the work support 21, a first shape work support 21-1, a second shape work support 21-2, and a third shape work support 21-3 will be described with reference to the drawings. explain.

[First Shape Work Support 21-1]
As shown in FIG. 3, the first shape work support 21-1 has a continuous triangular projection 211 at its upper end. When a plurality of such work supports 21-1 are arranged on the work support table 20 and the work W is placed thereon, the triangular protrusion 211 on the upper end of each work support 21-1 is projected onto the lower surface of the work W. , and the workpiece W is point-supported at a plurality of points . By point-supporting the work W, the probability that the laser beam hits the upper part of the work support 21-1 when the work W is cut is reduced, and damage to the work support 21-1 is suppressed.

Conventionally, a work support body in which triangular projections are continuously provided on the upper end of a metal plate has been used. The spatter generated in the step is welded and deposited. Therefore, the grooves between adjacent protrusions are deepened so that the shape of the protrusions on the upper part of the work support is maintained even if the spatter is deposited to some extent.

However, since the first shape work support 21-1 is made of carbon fiber having a high melting point as described above, even if spatter occurs, it does not adhere to the work support 21-1 and is easily peeled off. Since it falls, the groove between the adjacent projections 211 can be made shallow. By making the grooves between the projections 211 shallow, it is possible to prevent small workpieces W from falling into the grooves.

Further, if the weaving direction of the plain weave of the work support 21-1 described above is 0° to 90° with respect to the long side-short side direction of the work support 21-1, it will not be possible to increase the height by piercing or the like. If the energy laser beam hits and breaks the projection 211, there is a high possibility that the tip of the projection 211 will have a sharp shape like a needle as shown in FIG. If such a sharp shape is formed, it is necessary to pay attention so that the worker does not come into contact with this tip during the replacement work of the work support 21-1.

Therefore, when cutting out the work support 21-1 of the first shape from the flat-woven carbon fiber thin plate, as shown in FIG. The weaving direction becomes oblique with respect to the triangular shape of the projection 211 by cutting out in an oblique direction that does not match the 0°-90° direction, for example, in the 45°-45° direction. When the workpiece support 21-1 is formed in this way, when the laser beam strikes the projection 211 and damages it, the tip of the projection 211 is bent obliquely in the fiber direction as shown in FIG. 6, forming a sharp shape. is avoided.

Further, when the weaving direction of the plain weave of the work support 21-1 is 0°-90° with respect to the long side-short side direction of the work support 21-1, the projection 211 from above Loads and moments from the transverse direction cannot be resisted by either the longitudinal or transverse fibers at all. As a result, the strength of the work support 21-1 is lowered, and the work support 21-1 becomes easily damaged.

On the other hand, as described above, the weaving direction of the plain weave of the work support 21-1 is an oblique direction that does not coincide with the 0°-90° direction with respect to the long side-short side direction of the work support 21-1. For example, the 45°-45° orientation allows longitudinal and lateral fibers of projection 211 to resist loads from both the upward and lateral directions. This increases the strength of the work support 21-1.

Furthermore, when the oblique sides of the triangles of the projections 211 of the work support 21-1 are parallel to the weaving direction of the plain weave, the force that the fibers oppose to the load from above and the moment from the lateral direction to the projections 211 is become maximum. Therefore, instead of setting the angle of the apex of the projection 211 to about 30° as shown in FIG. 7A or about 60° as shown in FIG. A shape close to 90° is desirable.

[Second Shape Work Support 21-2]
As shown in FIG. 8, the second shape work support 21-2 has trapezoidal projections 212 continuously provided at the upper end thereof. When a plurality of work supports 21-2 are arranged on the work support table 20 and the work W is placed thereon, the upper surface of each trapezoidal projection 212 on the upper part of each work support 21-2 becomes the lower surface of the work W. , and the work W is supported. When the second shape work support 21-2 is used, the contact area with the work W becomes wider than when the first shape work support 21-1 is used, and the work W is stably supported.

However, if the upper end of the work support 21 is straight without any protrusions, the work W can be supported more stably. Not preferred due to restrictions. Therefore, by providing the trapezoidal projection 212, it is possible to stably support the workpiece W and secure an escape for the assist gas.

Considering that the upper surface of each of the trapezoidal projections 212 may be damaged by being irradiated with a laser beam, it is formed with a certain amount of space, so that even if a damaged portion occurs, the workpiece will not be damaged. It is possible to prevent the support of W from being hindered. Even if the upper surface of the projection 212 is widened to some extent, if the laser beam hits the upper surface of the projection 212 and damages it, the damaged portion becomes an escape for the assist gas.

Further, by forming the projection 212 at the upper end in a trapezoidal shape, the weaving direction of the work support 21-2 becomes 0°-90° with respect to the long side-short side direction of the work support 21-2. Even so, as shown in FIG. 9, if the laser beam hits near the center of the projection 212 and damages it, the formation of a sharp feature is avoided.

However, even if the projection 212 at the upper end is trapezoidal, the weaving direction of the work support 21-2 is 0°-90° with respect to the long side-short side direction of the work support 21-2. 10, there is a possibility that a sharp shape may be formed on the end side as shown in FIG.

In order to cope with this, in the work support 21-2 of the second shape as well as the work support 21-1 of the first shape, the long side-short side direction of the work support 21-2 is By cutting in a direction that is oblique to the weaving direction, for example, 45°-45°, the weaving direction is also oblique to the projections 212, and near the ends of the projections 212 were irradiated with a laser beam and damaged. In this case, as shown in FIG. 11, it is possible to prevent the thin portion on the end side from being bent obliquely in the direction of the fiber and forming a sharp shape.

In addition, by setting the weaving direction of the plain weave of the work support 21-2 to the diagonal direction of 45°-45° with respect to the long side-short side direction of the work support 21-2, The fibers of the projection 212 can withstand the load of , and the strength of the work support 21-2 is enhanced. At this time, as shown in FIG. 12, the protrusions 212 of the work support 21-2 are formed in a trapezoidal shape with an angle of both ends of the upper base close to 135°, so that the oblique sides of the protrusions 212 are parallel to the weaving direction of the plain weave. The strength of the work support 21-2 is increased.

[Third Shape Work Support 21-3]
As with the first shape work support 21-1, the third shape work support 21-3 has a continuous triangular projection 213 at the upper end. The long side-short side direction is 0°-90° oblique to the weaving direction, and as shown in FIG.

When such a work support 21-3 is placed on the work support table 20 and the projection 213 is irradiated with a laser beam and damaged, the tip of the projection 213 becomes flat as shown in FIG. 13(b). Higher probability and lower probability of forming sharp features. Similarly, the oblique side of the trapezoidal protrusion 212 provided on the second shape work support 21-2 may be formed in a stepped shape.

A plurality of work supports 21-1 to 21-3 having the first to third shapes are arranged in the work support table 20 in parallel in the X direction. As another form, a case in which a plurality of work supports are installed to cross each other will be described.

A work support used in this mode will be described with reference to FIG. The work support 21-4a shown in FIG. 14(a) has a continuous trapezoidal projection 214 at its upper end, and a work support for sandwiching another plate-shaped member at its lower end. Slits 215 corresponding to the plate thickness are provided at predetermined intervals. The workpiece support 21-4b of FIG. 14(b) has trapezoidal projections 214 continuously provided at the upper end thereof, and slits 216 are provided at predetermined intervals. The work support 21-4c shown in FIG. 14(c) has a flat upper end and slits 215 provided at predetermined intervals in the lower end. The workpiece support 21-4d in FIG. 14(d) has slits 216 at predetermined intervals in the upper end portion and the lower end portion is in a flat state.

A plurality of work supports 21-4a to 21-4d configured in this way are appropriately used, and each slit 215 at the lower end of the work support 21-4a or work support 21-4c is provided with the work support 21-4a. 4b or the respective slits 216 of the work supports 21-4d are fitted. As a result, the plate surfaces of the plurality of work supports 21-4a to 21-4d are intersected perpendicularly to the floor surface and combined into a mesh.

Work supports 21-4a to 21-4d combined in a mesh form are placed on work support table 20 as shown in FIG. By arranging the work supports 21-4a to 21-4d in this manner, the work W is supported more stably.

According to the above embodiment, the work supports 21-1 to 21-3 and 21-4a to 21-4d are made of carbon fiber, so that they are excellent in durability and can be used as a conventional metal work. The replacement frequency can be greatly reduced compared to the case of using a support.

In the above-described embodiment, the case where the work support is formed in a plate shape from plain-woven carbon fibers has been described, but the work support is not limited to plain weave, and may be formed in a plate shape by including carbon fibers in different directions. If so, it can be used as a work support as well. In this case as well, if the carbon fibers are oriented obliquely in a direction that does not match the 0°-90° direction with respect to the long side-short side direction of the work support, even if the laser beam hits the projection 211 and damages it, In addition, formation of a sharp shape at the tip of the protrusion is avoided, and the strength of the work support is increased.

In the above-described embodiment, the case where the work support is formed in a plate shape from plain-woven carbon fibers has been described, but the work support is not limited to plain-woven, and carbon fibers in a plurality of different directions (at least two directions) are used. If it is formed in a plate-like shape, it can be used as a work support as well. Again, if the carbon fibers are oriented at an angle that does not coincide with the 0°-90° The formation of a sharp shape at the tip of the projection when it hits 214 and breaks is avoided . Also, the strength of the work support increases.

1 laser processing machine 10 base 20 work support table 21, 21-1 to 21-3, 21-4a to 21-4d work support 22 table frame 30 frame 31, 32 side frame 33 upper frame 40 carriage 41 laser head 50 NC device 211, 212, 213, 214 Protrusion 215, 216 Slit

Claims (6)

Formed with multiple different orientation carbon fibers,
The direction of the carbon fibers is formed obliquely with respect to the long side and short side directions.
A work support used for a work support table. A triangular or trapezoidal projection is provided on the upper end
A work support used for the work support table according to claim 1. The oblique side of the protrusion is formed in a stepped shape.
A work support used for the work support table according to claim 2. Slits are provided for intersecting and fitting other plate-like members
A work support used for the work support table according to any one of claims 1 to 3 . 4. Thermal processing, wherein the work support according to any one of claims 1 to 3 is installed on a work support table in a state perpendicular to the floor surface and in a state in which the long side direction of the work support is curved. machine. 5. A thermal processing machine comprising a plurality of work supports according to claim 4 , which are combined in a mesh shape and installed on a work support table.

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