JPH07137000A - Cutting method by high pressure fluid jet and cutting device therefor - Google Patents

Abstract

PURPOSE:To prevent the damage of a workpiece caused by falling after being bored and support cut material stably at the cutting time so as to improve cutting accuracy. CONSTITUTION:Cutting line groups 32a, 32b and cutting line groups 35a, 35b are divided in every common direction on the cutting lines of a workpiece. Cutting positions are disposed in different positions on a cutting table 2 every cutting line group, and opening parts 4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b opened in correspondence with areas surrounding the respective cutting lines are formed at the cutting table 2 in the respective cutting positions. Cut material is positioned so that the cutting lines corresponding to the respective cutting line groups coincide with the opening parts, and cut by high pressure fluid jet while moving a nozzle along the cutting line of the workpiece.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-pressure jet fluid cutting method and a high-pressure jet fluid cutting apparatus capable of preventing a workpiece from dropping after cutting so as to prevent damage by the high-pressure jet fluid.

[0002]

2. Description of the Related Art Recently, in addition to the conventional mechanical cutting method, a cutting process technology applying a high-pressure jet fluid as shown in FIG. 8 has been developed. This cutting technology uses 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 workpiece A is cut by cutting while controlling the position and moving speed of the nozzle 40. In this type of cutting process, if the support surface of the support table that fixes the material to be cut is a flat surface, part of the water jet flow will bounce off and damage the material to be cut and the support table itself. It is necessary to take preventive measures. Generally, a non-planar member such as a honeycomb member is used as a supporting member to support the water jet flow so as to prevent it 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 falling and being damaged by the water jet flow after the processed product is cut out.

In a supporting member made of a honeycomb material, the material to be cut is not supported in the space portion of the cell, so that the pressure of the high-pressure jet fluid may cause the material to be cut to warp, thereby lowering the cutting accuracy. Generally, the 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 the fall of a processed product, for example, as disclosed in Japanese Patent Laid-Open No. 4-75900, a catcher having a bin-shaped cross section having an opening is formed on the lower surface of the material. It has been proposed that a sheet larger than the opening is attached to the supporting surface of the material to be cut so that the cut part does not drop 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 conventional case,
The high-pressure jet fluid causes severe wear and tear, resulting in a short service life.
It has the drawback that it cannot be used for a long time. Further, in the conventional technique described in the above-mentioned Japanese Patent Application Laid-Open No. 4-75900, the mechanism for fixing the material to be cut becomes complicated, and therefore, for example, high-mix low-volume production such as machining parts of aircraft and the like. However, there is a problem in terms of processing cost. On the other hand, when cutting a part that requires high precision in terms of processing accuracy, it is essential to support the material to be cut stably, but it is difficult to maintain the cutting accuracy while preventing the processed product from falling. It has been pointed out that there is a problem.

Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art, to prevent dropping of the hollowed-out component after cutting and to prevent damage to the processed product, and also to It is an object of the present invention to provide a cutting apparatus having a simple and durable cutting method and structure using a high-pressure fluid jet fluid that can stably support a material to be cut and can achieve improvement in cutting accuracy.

[0007]

To achieve the above object, the present invention provides a high-pressure fluid for ejecting a high-pressure fluid jet fluid from a movable nozzle to cut a workpiece from a material to be cut placed below. In a cutting method using a jet fluid, a cutting line group is divided for each common direction with respect to the cutting line of the processed product, and the cutting positions are arranged at different positions on the cutting table for each cutting line group, and each cutting line is cut. An opening that opens corresponding to the region surrounding the line is formed on the cutting table at each cutting position, and the material to be cut is positioned such that the corresponding cutting line for each cutting line group matches the opening. It is characterized by cutting with a high-pressure fluid jet fluid while moving the nozzle along a cutting line of the product. In addition, in order to achieve the above-mentioned object, the present invention is a cutting and processing apparatus by 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 below, A cutting table having an opening formed in a shape corresponding to a region surrounding each cutting line at a different cutting position for each cutting line group divided for each common cutting line of the processed product, and the material to be cut is A work plate that is fixed and is 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 faces immediately above the opening for each cutting line group. And a stopper for positioning the support plate so as to be positioned.

[0008]

[Function] For the cutting line group to be cut, 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. It is possible to perform cutting while moving a nozzle that ejects a fluid jet fluid along a cutting line. In this way, when the cutting of one cutting line group is completed, the cutting lines of the other cutting line group are made to coincide with the openings corresponding to them, and the same cutting is repeated, so that the processed product is cut from the material to be cut. It can be cut out. Since the work piece is cut while being supported by the portion between the openings of the cutting table, even if the work piece is separated from the material to be cut, it does not drop downward.

Further, since the cutting lines are divided into cutting line groups having the same direction and are cut for each cutting line of each cutting line group, the interval for supporting the material to be cut does not have to be narrow, and as a result, it is stable. Therefore, it is possible to perform accurate cutting along the cutting line.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a cutting method and a cutting device 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 device for carrying out the cutting method according to this embodiment, and FIG. 2 is a side view thereof. The cutting apparatus, which is generally indicated by reference numeral 1, is composed of a plate-shaped cutting table 2 and a support plate 3 rotatably mounted on the cutting table 2 and to which the material W to be cut is fixed.

As shown in FIG. 7, as the material W to be cut, a disk-shaped plate member having a large hole 31 in the central portion thereof so as to be easily fixed to the support plate 3 is used. Four workpieces A are cut out from the material W to be cut by a water jet. In this embodiment, since the shape of the processed product A is a rectangular parallelepiped, the cutting lines include a cutting line in the longitudinal direction of the processed product and a cutting line in the width direction. Therefore,
The cutting lines having the same direction are divided into cutting line groups, and on the support base 2, the cutting positions are made different for the cutting line groups in the longitudinal direction and the cutting line groups in the width direction. The openings are arranged.

In this embodiment, as the openings, the long holes 4a, 4b and the long holes 6a, 6b corresponding to the cutting lines in the longitudinal direction of the processed product and the rectangles corresponding to the cutting lines in the width direction are formed. The holes 5a and 5b and the rectangular holes 7a and 7b are formed in substantially symmetrical positions. The long holes 4a and 4b and the long holes 6a and 6b are
The workpiece is opened so as to surround the cutting lines 32a and 32b in the lengthwise direction in a state where the cutting position is determined. 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 dimension of the processed product to be hollowed out.
Therefore, the intermediate portions 33, 34 between the long holes 4a, 4b and the long holes 6a, 6b serve as support portions for supporting the processed products so that they do not fall off. Similarly, the rectangular holes 5a, 5b and the rectangular holes 7a, 7b are opened so as to surround the cutting lines 35a, 35b in the width direction when the cutting position of the processed product is positioned immediately above them. Further, the distance between the rectangular holes 5a and 5b and the rectangular holes 7a and 7b corresponds to the dimension in the length direction of the processed product, and the intermediate portions 36 and 37 thereof are configured as support portions for preventing the processed product from falling.

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

On the other hand, the support plate 3 is a disk-shaped member rotatably mounted at the center position of the cutting table 2 by a rotary shaft 12, and the arm portion 1 extending in the radial direction.
It is configured integrally with 3. In the cutting table 2, a first stopper pin 10 and a second stopper pin 11, which are planted at positions 90 degrees symmetrical with respect to the rotation shaft 12, come into contact with the arm portion 13, and the rotation position of the support plate 3 is changed. Positioned. The first stopper pin 10 cuts the cutting lines 32a, 32b in the longitudinal direction of the processed product into the elongated holes 4a, 4b, 6a, 6b.
The second stopper pin 11 is a stopper for matching
Cut the cutting lines 35a, 35b in the width direction into rectangular holes 5a, 5
b, 7a, 7b. In addition,
It is preferable to provide identification marks M and N near the first stopper pin 10 and the second stopper pin 11 so that the cutting line to be cut can be seen at a glance.

Further, the support plate 3 is provided with a holding bracket 14 for fixing the processed product at a position symmetrical with respect to the rotating shaft 12. The presser bracket 14 is
It is configured to be movable along a long groove 16 which is long in the radial direction. The press bracket 14 is fixed by a press bolt 15 and pressed against the peripheral wall of a central fixing hole 31 of the cut material W to be cut the cut material. W can be fixed concentrically on the support plate 3. Reference numeral 17 indicates a scale for adjusting the position of the presser bracket 14.

Next, a method of actually hollowing a processed product from the material W to be cut will be described. First, when the material W to be cut is 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 cutting lines 32a and 32b in the longitudinal direction are aligned with the long holes 4a and 4b and the long holes 6a and 6b, respectively. it can. In this state,
As shown in FIGS. 3 and 4, while the nozzle 40 that ejects the water jet 41 is moved at a predetermined speed along the cutting lines 32a and 32b, the material W to be cut is cut along the cutting line 32.
It can be hollowed out along a and 32b. in this case,
Since the cutting lines 32a and 32b run in parallel to each other, the movement control of the nozzle 40 is easy and the cutting can be performed efficiently.

Next, referring to FIG. 1, the support plate 3 is supported until the arm portion 13 comes into contact with the other stopper pin 11.
When the support plate 3 is rotated, the cutting lines 35a, 35b in the respective width directions are formed on the support plate 3 in the rectangular holes 5a, 5b, 7a, 7
The material W to be cut can be positioned so as to match b. At this cutting position, as shown in FIGS.
It is possible to perform cutting along the cutting line in the width direction while moving the nozzle 40. Like this in the longitudinal direction,
The workpiece can be hollowed out of the material W to be cut by cutting along the cutting lines having the same direction such as the width direction. The processed products after being hollowed out are rectangular holes 5a, 5b and rectangular holes 7a, 7
Since it is supported by the intermediate portions 35 and 36 between it and b without falling down, it is not damaged by the high pressure jet fluid. Moreover, while cutting, the intermediate portion 36,
Since it is stably supported by 37, it can be cut accurately.

[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 having common directions, and different cutting line groups have different positions. The cutting is performed so that the cutting line is aligned with the corresponding opening at each cutting position and the cutting is performed by the high-pressure fluid jet fluid. Therefore, even if the processed product is separated from the material to be cut, the processed product remains on the cutting table, so that it can be prevented from falling, and cutting can be performed for each cutting line group having a common direction, so that the cutting can be performed efficiently. In addition, the material to be cut can be stably supported during cutting, and the cutting accuracy can be improved. Also, as a cutting device,
A cutting table with an opening formed for each cutting line at a predetermined position,
Since it has a simple structure consisting of a support plate for fixing the material to be cut, it can be used for high-mix low-volume production of processed products at low cost. It will improve.

[Brief description of drawings]

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

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 cutting line group in a longitudinal direction.

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

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

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

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

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

[Explanation of symbols]

 1 Cutting Device 2 Cutting Stand 3 Support Plates 4a, 4b Oblong Holes 5a, 5b Rectangular Holes 6a, 6b Oblong Holes 7a, 7b Oblong Holes 8 Plate Fixing Pins 9 Plate Fixing Pillars 10 1st Stopper Pins 11 2nd Stopper Pins 12 Rotating Shafts 14 Presser brackets 32a, 32b Cutting lines in the longitudinal direction 35a, 35b Cutting lines in the width direction 40 Nozzles 41 Water jet W Materials to be cut

Claims (2)

[Claims] 1. A cutting method using a high-pressure fluid jet fluid, which sprays a high-pressure fluid jet fluid from a movable nozzle to cut a workpiece from a material to be cut placed below, the cutting line of the workpiece being 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 portion corresponding to the area surrounding each cutting line is opened at each cutting position. Formed on the cutting table, positioning the material to be cut so that the corresponding cutting line for each cutting line group coincides with the opening, and moving the nozzle along the cutting line of the processed product while high pressure fluid jet fluid A cutting method using a high-pressure fluid jet fluid, characterized by cutting with 2. A cutting device 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 below, in a common direction for cutting lines of the workpiece. Each cutting line group is divided into different cutting lines, and a cutting table having an opening formed in a shape corresponding to the area surrounding each cutting line is formed at a different cutting position. A work plate rotatably mounted on the cutting table so that the cutting plate can be positioned at a rotation position, and the support plate is positioned so that each cutting line faces each position directly above the opening for each cutting line group. A cutting device by a high-pressure fluid jet fluid, which is provided with a stopper for determining.