JP3281148B2 - Cutting method using high-pressure fluid jet fluid and cutting apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting method using a high-pressure jet and a cutting apparatus using the high-pressure jet to prevent a workpiece after cutting from falling and to prevent damage due to the high-pressure jet.

[0002]

2. Description of the Related Art In addition to a conventional mechanical cutting method, a cutting technique utilizing a high-pressure jet fluid as shown in FIG. 8 has recently been developed. This cutting technology uses the nozzle 4
This is a cutting process in which the water jet stream 41 is jetted from 0 toward the material W to be cut, and the processed product A is cut by cutting while controlling the position and the moving speed of the nozzle 40. In this kind of cutting, if the support surface of the support that fixes the material to be cut is flat, a part of the water jet flow rebounds, and there is an inconvenience that the material to be cut and the support itself may be damaged. It is necessary to take preventive measures. Generally, a non-planar member such as a honeycomb material is used as a support member to prevent the water jet flow from rebounding. Further, in the case of performing processing such as hollowing out a processed product, it is necessary to prevent the processed product from being damaged by a water jet flow while falling after the processed product is cut out.

In a supporting member made of a honeycomb material, since the material to be cut is not supported in the space of the cell, the cutting accuracy may be reduced due to the warpage of the material to be cut due to the pressure of the high-pressure jet fluid. Generally, cutting accuracy is maintained by narrowing the support interval by using a honeycomb material having small cells.

On the other hand, as a conventional technique for preventing a workpiece from dropping, for example, as disclosed in Japanese Patent Application Laid-Open No. 4-75900, a bin-shaped catcher having an opening is provided on the lower surface of a material. In addition, a sheet larger than the opening is provided on the support surface of the material to be cut, so that the cut part does not fall down from the opening when the small hollow part is cut. .

[0005]

However, in the case where the support base is formed by using the honeycomb material as in the prior art,
The service life is short because of high wear due to high pressure jet fluid,
There is a disadvantage that it cannot be used for a long time. Further, in the prior art described in Japanese Patent Application Laid-Open No. 4-75900, a mechanism for fixing a material to be cut becomes complicated, so that, for example, high-mix low-volume production such as processing of parts such as aircraft is required. Are not suitable and have a problem in terms of processing cost. On the other hand, when cutting parts that require precision in terms of processing precision, it is essential to stably support the material to be cut, but it is difficult to maintain the cutting precision while preventing the workpiece from falling. It is pointed out that this is the problem.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems of the prior art, to prevent a hollow part after dropping from falling, thereby preventing damage to a processed product, and at the time of cutting. An object of the present invention is to provide a cutting method using a high-pressure fluid jet fluid, which is capable of stably supporting a material to be cut and achieve an improvement in cutting accuracy, and a simple and durable cutting apparatus having a configuration.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a high pressure fluid for cutting a workpiece from a material to be cut below by ejecting a high pressure fluid jet from a movable nozzle. In the cutting method using a jet fluid, a cutting line group is divided for each direction common to a cutting line of the processed product, and a cutting position is arranged at a different position on a cutting table for each cutting line group. Forming an opening corresponding to the area surrounding the line on the cutting table at each cutting position, positioning the material to be cut so that the corresponding cutting line for each cutting line group coincides with the opening; The cutting is performed by a high-pressure fluid jet while moving the nozzle along a cutting line of the product. The present invention also provides a cutting apparatus using a high-pressure fluid jet for jetting a high-pressure fluid jet from a movable nozzle and cutting a workpiece from a material to be cut below, in order to achieve the above object. A cutting table in which an opening that opens in a shape corresponding to a region surrounding each cutting line is formed at a different cutting position for each cutting line group divided for each direction common to the cutting line of the processed product, and the material to be cut is A work plate fixed and rotatably mounted on the cutting table so that the material to be cut can be positioned at a predetermined rotation position, and each cutting line for each of the cutting line groups faces directly above the opening. A stopper for positioning the support plate so as to be positioned.

[0008]

When the material to be cut is positioned so that the cutting line coincides with the corresponding opening of the cutting table, the space below the cutting line is the space of the opening. The cutting can be performed while moving the nozzle that ejects the fluid jetting fluid along the cutting line. In this way, when the cutting of one cutting line group is completed, the cutting line of the other cutting line group is made to coincide with the opening corresponding thereto, and the same cutting is repeated. Can be cut out. Since the processed product is cut while being supported at a portion between the openings of the cutting table, the processed product does not fall downward even if the processed product is cut off from the material to be cut.

Further, since the cutting line is divided for each cutting line group having a common direction and cut for each cutting line of each cutting line group, the interval for supporting the material to be cut does not need to be narrowed, and the stable Since it is possible to perform the cutting, it is possible to perform the cutting with high accuracy along the cutting line.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a cutting method and a cutting apparatus using a high-pressure fluid jet according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a plan view of a cutting apparatus for performing a cutting method according to the present embodiment, and FIG. 2 is a side view thereof. The cutting device represented by reference numeral 1 is composed of a plate-shaped cutting table 2 and a support plate 3 which is rotatably mounted on the cutting table 2 and on which the material W to be cut is fixed.

As shown in FIG. 7, as the material to be cut W, a disk-shaped plate member having a large hole 31 cut out in the center so as to be easily fixed to the support plate 3 is used. Four workpieces A are cut out of the workpiece W by water jetting. In this embodiment, since the shape of the workpiece A is a rectangular parallelepiped, there are two cutting lines in the longitudinal direction of the workpiece and the cutting line in the width direction. Therefore,
In order to make the cutting position different for each of the cutting line group in the longitudinal direction and the cutting line group in the width direction on the support 2, a plurality of cutting lines are set as follows. Are arranged.

In this embodiment, the openings are elongated holes 4a, 4b and 6a, 6b corresponding to the cutting line in the longitudinal direction of the processed product, and a rectangle corresponding to the cutting line in the width direction. Holes 5a and 5b and rectangular holes 7a and 7b are formed at substantially symmetric positions. The long holes 4a, 4b and the long holes 6a, 6b
In the state where the cutting position of the processed product is positioned, an opening is provided so as to surround the cutting lines 32a and 32b in the length direction. The distance between the two holes, such as the long holes 4a and 4b and the long holes 6a and 6b, corresponds to the width of the workpiece to be hollowed out.
Therefore, the intermediate portions 33, 34 between the long holes 4a, 4b and the long holes 6a, 6b are used as supporting portions to support the processed product so as not to fall off. Similarly, the rectangular holes 5a, 5b and the rectangular holes 7a, 7b are open so as to surround the widthwise cutting lines 35a, 35b when the cut position of the processed product is positioned immediately above the rectangular holes 5a, 5b. The distance between the rectangular holes 5a, 5b and the rectangular holes 7a, 7b corresponds to the lengthwise dimension of the workpiece, and the intermediate portions 36, 37 are configured as support portions for preventing the workpiece from dropping.

The cutting table 2 constructed as described above is connected at its four corners to a plate supporting pole 9 via plate fixing pins 8.
Thus, the entire cutting table 2 is supported at a position at a predetermined height from a base of a processing device (not shown).

On the other hand, the support plate 3 is a disk-shaped member attached at the center of the cutting table 2 so as to be rotatable by a rotating shaft 12, and the arm portion 1 extending in the radial direction.
3 and one. The first stopper pin 10 and the second stopper pin 11 planted at positions symmetrical with respect to the rotation axis 12 by 90 degrees on the cutting table 2 abut on the arm 13, and the rotation position of the support plate 3 is adjusted. Positioned. The first stopper pins 10 are used to cut the cutting lines 32a, 32b in the longitudinal direction of the workpiece into elongated holes 4a, 4b, 6a, 6b.
And the second stopper pin 11
Cuts the width direction cutting lines 35a, 35b into the rectangular holes 5a, 5b.
b, 7a, and 7b. In addition,
It is preferable that identification marks M and N are respectively provided near the first stopper pin 10 and the second stopper pin 11 so that a cutting line to be cut can be seen at a glance.

A support bracket 14 for fixing a workpiece is provided on the support plate 3 at a position symmetrical with respect to the rotation shaft 12. Presser bracket 14
The press-fit bracket 14 is fixed by a press bolt 15 and is pressed against the peripheral wall of the fixing hole 31 at the center of the cut material W, so that the cut material can be moved along the long groove 16 in the radial direction. W can be fixed concentrically on the support plate 3. Reference numeral 17 denotes a scale for adjusting the position of the holding bracket 14.

Next, a method of actually hollowing out a processed product from the material W to be cut will be described. First, when cutting the material W to be cut along the cutting line in the longitudinal direction, the support plate 3 is rotated until the side surface of the arm member 13 of the support plate 3 hits the first stopper pin 10 in FIG. As a result, the material W to be cut fixed to the support plate 3 rotates together with the support plate 3 so that the longitudinal cutting lines 32a and 32b are aligned with the long holes 4a and 4b and the long holes 6a and 6b. it can. In this state,
As shown in FIGS. 3 and 4, while moving the nozzle 40 for jetting the water jet 41 at a predetermined speed along the cutting lines 32a and 32b, the material W to be cut is moved along the cutting line 32.
a, 32b can be cut out. in this case,
Since the cutting lines 32a and 32b run in parallel, the movement control of the nozzle 40 is easy, and cutting can be performed efficiently.

Next, in FIG. 1, the support plate 3 is moved until the arm 13 contacts the other stopper pin 11.
Is rotated, the cutting lines 35a, 35b in the respective width directions on the support plate 3 are rectangular holes 5a, 5b, 7a, 7
The material W to be cut can be positioned so as to coincide with b. At this cutting position, as shown in FIGS. 5 and 6,
The cutting process can be performed along the cutting line in the width direction while moving the nozzle 40. Thus, in the longitudinal direction,
It is possible to cut the processed product from the material W to be cut by cutting at each cutting line having a common direction such as the width direction. The processed products after the hollowing are rectangular holes 5a, 5b, rectangular holes 7a, 7
Since it is supported without falling down by the intermediate portions 35 and 36 between it and b, it is not damaged by receiving the high-pressure jet fluid. Moreover, during cutting, the intermediate portion 36,
Since it is stably supported by 37, it can be cut with high accuracy.

[0018]

As is apparent from the above description, according to the present invention, the cutting lines of the parts to be cut are divided into cutting line groups for each having a common direction, and at different positions for each cutting line group. The cutting is performed, and the cutting line is made to coincide with the corresponding opening at each cutting position so that the cutting is performed by the high-pressure fluid jet fluid. For this reason, even if the processed product is cut off from the material to be cut, the processed product remains on the cutting table, so that the processed product can be prevented from dropping, and can be cut efficiently for each cutting line group having a common direction, Moreover, it is possible to stably support the material to be cut at the time of cutting, thereby achieving an improvement in cutting accuracy. Also, as a cutting device,
A cutting table having an opening at a predetermined position for each cutting line,
The simple configuration consisting of a support plate for fixing the material to be cut enables low-cost production of a large variety of processed products at low cost.Durability is greatly improved because no honeycomb material is used unlike the conventional one. It will improve.

[Brief description of the drawings]

FIG. 1 is a plan view showing a configuration of a cutting apparatus according to a position embodiment of the present invention.

FIG. 2 is a partial cross-sectional side view of the cutting device in FIG.

FIG. 3 is a plan view showing a situation when cutting a group of cutting lines in a longitudinal direction.

FIG. 4 is a sectional view taken along line III-III in FIG. 3;

FIG. 5 is a plan view showing a situation when a cutting line group in the width direction is cut.

FIG. 6 is a sectional view taken along line IV-IV in FIG. 5;

FIG. 7 is a perspective view showing a material to be cut and a workpiece to be cut out from the material.

FIG. 8 is a perspective view showing a conventional cutting technique for hollowing out a part from a material using a high-pressure fluid jet fluid.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cutting device 2 Cutting table 3 Support plate 4a, 4b Elongated hole 5a, 5b Rectangular hole 6a, 6b Elongated hole 7a, 7b Elongated hole 8 Plate fixing pin 9 Plate fixing column 10 First stopper pin 11 Second stopper pin 12 Rotating shaft 14 Holding bracket 32a, 32b Cutting line in longitudinal direction 35a, 35b Cutting line in width direction 40 Nozzle 41 Water jet W Material to be cut

Claims (2)

(57) [Claims] 1. A cutting method using a high-pressure fluid jet fluid for jetting a high-pressure fluid jet fluid from a movable nozzle to cut a workpiece from a material to be cut placed therebelow, wherein a cutting line of the workpiece is common. The cutting line group is divided for each direction, the cutting positions are arranged at different positions on the cutting table for each cutting line group, and the opening that opens corresponding to the area surrounding each cutting line is set at each cutting position. The high-pressure fluid jet fluid formed on the cutting table, positioning the material to be cut such that the corresponding cutting line for each of the cutting line groups coincides with the opening, and moving the nozzle along the cutting line of the workpiece A cutting method using a high-pressure fluid jet fluid characterized by cutting by a high-pressure fluid jet fluid. 2. A cutting apparatus using a high-pressure fluid jet for jetting a high-pressure fluid jet fluid from a movable nozzle to cut a workpiece from a material to be cut placed therebelow, wherein a direction common to a cutting line of the workpiece is provided. A cutting table having an opening formed in a shape corresponding to a region surrounding each cutting line at a cutting position different for each cutting line group divided for each, a material to be cut is fixed, and the material to be cut is fixed to a predetermined position. A work plate rotatably mounted on the cutting table so as to be positioned at a rotational position, and a position of the support plate such that each cutting line for each of the cutting line groups faces a position immediately above the opening. A cutting device using a high-pressure fluid jet fluid, comprising a stopper for determining the pressure.