JP2011235340A - Surface plate for cutting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a surface plate for cutting which is used to cut a workpiece to be cut while being melted and is equipped with flat bars set upright parallel to the surface plate, upper end parts of the flat bars being fitted with protective covers for protecting the upper end portions from melting so that slag generated during cutting work can be received by a very simple structure without graveling the portion under the surface plate and without providing a conveyor.SOLUTION: The protective covers 3 mounted on the upper end portions of the flat bars at regular intervals are provided with a slag receiver 6 which projects right and left at the center in the longitudinal direction so as to receive slag generated during the cutting work. The protective cover 3 has an upper side portion tapered toward the upper end like a wedge so that, if a heating source hits against the protective cover 3, the workpiece to be cut is not damaged by a bounce of the heating source because the protective cover 3 guides the heating source away.

Description

  The present invention relates to a surface plate for cutting that is used when a workpiece is cut using a plasma cutting torch, a laser cutting torch, or the like.

  This type of cutting surface plate generally has a configuration in which a plurality of flat bars are erected in parallel on a gantry, or has a configuration in which flat bars are erected in a grid pattern vertically and horizontally to cut a material to be cut. Sometimes, the torch is moved in the longitudinal direction of the surface plate on the surface plate, and the plasma arc or laser beam is injected or irradiated to melt the material to be cut. When cutting, a large amount of melt is generated.

  The generated spear falls to the floor and stagnates, but once it cools and hardens, it is not easy to remove.

  As a measure against noro, a method of spreading gravel on the floor under the surface plate (Patent Document 1), whether a crawler-shaped unloader with many flats connected endlessly is placed under the surface plate and unloading the unrolled noro Alternatively, there is known a method (Patent Document 2) for recovering the sludge by moving the bucket onto the floor surface.

  At the time of cutting the material to be cut as described above, the upper end portion of the flat bar tends to melt. As a countermeasure, a cap-shaped protective cover is placed on the upper end of the flat bar, and when the protective cover is melted, the protective cover is replaced to protect the flat bar tip from melting.

JP-A-6-134573 Patent No. 4040154

The conventional countermeasures described above require time or equipment for carrying out.
An object of the present invention is to provide a cutting platen for cutting off that can solve the above problems.

  The invention according to claim 1 is a cutting platen used when cutting a material to be cut using a heat source such as gas, plasma, laser, etc., and on which the material to be cut is placed. Or has a configuration in which the flat bar is erected vertically and horizontally, and at the flat bar upper end of the flat bar, the flat bar upper end is protected at least from being damaged. In the surface plate for cutting which is detachably attached to the cover, the protective cover is characterized in that a slot receiver for receiving a slot generated at the time of cutting projects from the side.

The invention according to claim 2 is the invention according to claim 1, characterized in that the protective cover is divided into a plurality of parts in the longitudinal direction and can be removed individually.
The invention according to claim 3 is the invention according to claim 1 or 2, characterized in that the protective cover is formed in a wedge shape having at least an upper end portion tapered toward the upper end.

  According to the first aspect of the present invention, the protective cover attached to the front end portion of the flat bar can be received with a very simple structure and can receive the cutting generated at the time of cutting. Thus, there is no need to lay gravel under the surface plate or install an unloader. In addition, the slot accumulated in the slot receiver is collected together with the protective cover when the protective cover is replaced.

  According to the invention according to claim 2, since only the protective cover at the location where the erosion is severe can be replaced (there is no erosion or no cracking at the both sides of the surface plate, particularly at both ends, so there is almost no protection. There is little or no need to provide a cover, and even if a protective cover is provided, there is no need to replace it, or there is no problem even if it is not replaced), and the entire protective cover is replaced. Compared to, it is economical and easy to replace. Further, the replacement of the protective cover can be performed after the material to be cut is once moved onto the protective cover outside the replacement area, and can be performed without interrupting the cutting operation.

  According to the third aspect of the present invention, even when a heat source such as gas, plasma arc, laser beam or the like hits the protective cover, it is guided by the protective cover and escapes and prevents the material to be cut back from being damaged. it can.

The top view which shows schematic structure of an example of the surface plate for cutting. The side view which shows schematic structure of the flat bar which attached the protective cover. The figure which shows the detail of the principal part of FIG. AA line expanded sectional view of FIG. Sectional drawing of the deformation | transformation aspect of a protective cover.

Hereinafter, a surface plate for cutting according to an embodiment of the present invention will be described with reference to the drawings.
A cutting surface plate 1 shown in FIG. 1 is formed by, for example, cast iron or steel flat bars 2 standing in parallel, and a protective cover 3 at a fixed interval at the upper end of the flat bar as shown in FIG. Is attached and detachably attached.

  3 shows details of the protective cover 3 attached to the upper end of the flat bar. FIG. 4 shows a cross section taken along the line AA of FIG. It is made of the same material, for example, made of cast iron or steel, and has an insertion groove 4 to be inserted into the upper end of the flat bar on the lower side, and the upper side has a tapered wedge shape toward the upper end. Then, the slot 6 that protrudes from the left and right sides is fixed to the center in the vertical direction by welding or integrally formed. In the example shown in the figure, the slot receiver 6 has a form that protrudes sideways, but may have any form as long as it has a function of receiving the slot. FIG. 5 shows another example of the slot receptacle. The slot receptacle 8 has a hook-like shape with an upward cross section so that the received slot will not fall out.

  The protective cover 3 is attached to the flat bar 2 by inserting the protective cover 3 into the upper end of the flat bar, passing the bolt 9 through the protective cover 3, and screwing it into the upper end of the flat bar (FIG. 4). ).

  The protective cover 3 described above is provided over the entire area of the cutting platen 1, but is provided only in a portion where melting damage, i.e., no cracking, is likely to occur, for example, in the central portion of the platen 1 excluding the left and right side portions or the left and right ends. May be.

  The protective cover 3 of the preferred embodiment described above is attached at regular intervals in the longitudinal direction of the upper end portion of the flat bar, and each protective cover 3 is formed in a wedge shape on the upper side. By merely providing the above-described slot receptacles 6 and 8 on the cover 3, the slot at the time of cutting can be received and the intended purpose of the present invention can be achieved.

  In the above-described embodiment, the cutting surface plate 1 is configured by standing the flat bars 2 in parallel. However, even in the existing structure in which the flat bars are erected in a grid shape in the vertical and horizontal directions, The protective cover 3 provided with 6 and 8 is similarly attached to the required flat bar.

1 .. Surface plate for cutting 2. Flat bar 3. Protection cover 4. Insertion groove 6, 8

Claims (3)

  A cutting platen used when cutting a material to be cut using a heat source such as gas, plasma, laser, etc., on which the material to be cut is placed. It has a configuration that stands vertically and horizontally, and attaches to the flat bar upper end of the flat bar at least where it is easily melted, so that the protective cover for protecting the flat bar upper end from melting can be removed. In the cutting plate, the cutting plate is characterized in that the protective cover is provided with a blade receiving a blade that receives the blade generated during cutting.   2. The surface plate for cutting according to claim 1, wherein the protective cover is divided into a plurality in the longitudinal direction and can be removed individually.   The cutting platen according to claim 1 or 2, wherein the protective cover is formed in a wedge shape having at least an upper end portion tapered toward the upper end.