JPH05162078A - Cutting method for member to be cut - Google Patents

Abstract

PURPOSE:To accurately perform cutting work of a plurality of piled metallic thin plates by utilizing water jet, so as to prevent deformation of a cut pattern. CONSTITUTION:In a cutting method for members to be cut by water jet cutting by which metallic thin plates 10 are cut by jet-injecting high pressure water mixed with abrasives from an injection nozzle 13 to the metallic thin plates, a presser jig having a pressing member 21 to press the circumference of the cutting part of the metallic thin plates to be cut is provided, the jig is interlocked with the injection nozzle 13 to be moved on the metallic thin plates 10, and after pressing the metallic thin plates 10 with the pressing member 21, high pressure water is jet-injected from the injection nozzle 13 so as to cut the prescribed cutting part of the metallic thin plates 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of cutting a member to be cut such as a thin metal plate using water jet cutting.

[0002]

2. Description of the Related Art Conventionally, in this type of cutting method, as shown in FIG. 7, an abrasive supplied from an abrasive supply hose 11 is mixed with high pressure water supplied from a pump (not shown) in a cutting head 12. Then, the high-pressure water is jetted from the jet nozzle 13 provided in the water jet processing machine to the member 10 to be cut in which a plurality of metal thin plates such as copper and iron are superposed to cut the metal thin plate into a predetermined shape. There has been proposed a method of reducing the running cost by using an abrasive water jet to be processed.

[0003]

However, in the above method, during cutting the stacked metal thin plates with high pressure water,
The thin metal plate may swell (see the chain line in FIG. 7), which causes problems such as deterioration of processing accuracy and deformation of the cutting pattern. The present invention has been made in view of the above problems, and an object of the present invention is to provide a method of cutting a member to be cut that can accurately cut and process a plurality of metal thin plates stacked by using a water jet.

[0004]

In order to achieve the above object, the present invention cuts a member to be cut by water jet cutting in which high pressure water is jetted from a jet nozzle to the member to be cut to cut the member to be cut. In the method, a pressing jig that presses the periphery of the cut portion of the member to be cut is disposed, the jig is moved on the member to be cut in conjunction with the cutting operation of the jet nozzle, and A method of cutting a member to be cut is provided in which the member to be cut is pressed by the jig to cut a predetermined cut portion of the member to be cut.

[0005]

Function: For example, a plurality of columns are arranged so as to surround the injection nozzle, and a holding jig having a pressing member attached to the lower part of the columns is provided around the cut portion of the metal thin plate at the time of cutting the metal thin plate. After pressing from above with a holding jig, the above-mentioned cut portion is cut. Therefore, the laminated metal sheets are
Precise cutting is possible without bulging during cutting.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings of FIGS. In the following figures, the same components as those in FIG. 7 are designated by the same reference numerals for convenience of explanation. FIG. 1 is a diagram showing a structure of a first embodiment of a holding jig for explaining a method of cutting a member to be cut by water jet cutting according to the present invention, and FIG. 1 (a) is a plan view thereof. FIG. 1 (b) is a sectional view taken along the line AA of FIG. 1 (a). In the figure, a holding jig is four columns 20 arranged around the injection nozzle 13 of the water jet processing machine at a predetermined interval, and a pressing unit provided under each column 20 for pressing the thin metal plate 10. It comprises a member 21, an upper lid 22 and a lower lid 23 provided on the tops of the columns 20, and a moving mechanism 24 for moving the pressing jig in the Y direction in the drawing. Further, position detecting sensors 25 and 26 for detecting the positions of the jet nozzle 13 in the three-dimensional X, Y and Z directions are arranged on the column 20 which is one with the cutting head 12.

The pressing member 21 is formed in a hollow disc shape so that a predetermined portion of the thin metal plate 10 can be cut by moving the jet nozzle 13, for example. It is also possible to place a weight 21a on the pressing member 21 as necessary and press the metal thin plate 10. The moving mechanism 24 is composed of, for example, a screw bolt, the upper part is attached to the water jet processing machine main body, and the lower part is attached to the lower lid 23. The moving mechanism 24 is driven by hydraulic pressure or pneumatic pressure, etc. Move the tool in the Y direction.

The cutting in the Z direction is performed by moving the mounting table 27, which is arranged in the water jet processing machine and on which the thin metal plate 10 is mounted and fixed, in the Z direction. next,
The interlocking operation of the nozzle and the pressing member according to the cutting method of the present invention will be described with reference to the drawing of FIG. The control unit of the water jet processing machine (not shown) moves the jet nozzle 13 and the pressing jig to the cutting start position of the thin metal plate 10 mounted on the mounting table 27, and further drives the moving mechanism 24 for the pressing jig. Then, the metal thin plate 10 is lowered to a predetermined position and the metal thin plate 10 is pressed. Here, when performing continuous cutting, the metal thin plate 10 is cut while moving the jet nozzle 13 in the X and Y directions.

First, from the cutting start position of the injection nozzle 13 (center position of the pressing member 21) shown in FIG.
When the metal thin plate 10 is cut by a distance L in the X direction as shown in FIG.
Before the contact with the pressure sensor 2, the movement mechanism 24 is driven and controlled according to the position detection of the sensor 25 so that the position of the injection nozzle 13 is changed to the pressing member 2.
The pressing member 21 is instantly moved by L in the X direction so as to coincide with the center position of 1. Then, as shown in FIG. 2 (c), when the thin metal plate 10 is cut in the X direction by the distance L, the control section instantaneously moves the pressing member 21 in the same manner as described above, and the position of the injection nozzle 13 is moved. Is the pressing member 21
It is controlled to come to the center position of. That is, the distance L
Is a limit distance at which the injection nozzle 13 does not cut the pressing member 21, and the control unit manages the movement of the distance L so that the metal thin plate 10 by the injection nozzle 13 is controlled.
The cutting operation can be continuously performed while the metal thin plate 10 is always pressed.

Therefore, in the present embodiment, the metal thin plates can be cut while the metal thin plates are always pressed, so that the stacked metal thin plates do not bulge during cutting. FIG. 3 is a diagram showing a cutting width when a member to be cut in which 40 thin copper plates 0.2 [t] are stacked is cut by using the above-described embodiment. The cutting conditions in this case are cutting speed 120 [mm / min] and cutting pressure 3500.
[Kg / cm ² ], orifice diameter 16/1000 inch, mixing tube diameter 40/1000 inch, garnet amount 300 [g / min], garnet grain size 80.

As can be seen from FIG. 3, when the above-mentioned thin copper plate is cut without using the pressing jig according to this embodiment, the cutting width of the cut portion is from the first copper plate at the upper part to the lower part. It becomes narrower toward the 40th copper plate, resulting in deterioration of processing accuracy and deformation of the cutting pattern. On the other hand, when the thin copper plate is cut using the pressing jig according to the present embodiment, the cut width of the cut portion is almost the same for both the first upper copper plate and the lower 40th copper plate. It didn't change. As is apparent from this example, the swelling of the metal thin plate at the time of cutting can be easily suppressed by cutting the thin copper plate using the pressing jig under the above conditions.

The holding jig according to the present invention is not limited to the jig shown in FIG. 1, but may have the structure shown in the second embodiment of FIG. 4, for example, to prevent the thin metal plate from bulging at the time of cutting. You can Here, FIG. 4 (a) is a plan view of FIG.
(b) is a BB arrow line view of Fig.4 (a). The pressing jig of the second embodiment in the figure is configured such that a plurality of steel balls 30 (four in the embodiment) are attached to the pressing member 21 and can move in the X direction simultaneously with the injection nozzle 13. In this case, the cutting can be smoothly performed while pressing the metal thin plate 10 at a constant pressure.

In the third and fourth embodiments shown in FIGS. 5 and 6, the pressing member 21 is a donut-shaped pressing member so that the thin metal plate 10 can be easily moved to the left and right when the pressing jig is moved. A jig (FIG. 5 (a) is a plan view, FIG. 5 (b) is its BB arrow view), and a holding jig (FIG. 6) in which R31 is provided below the pressing member 21 that abuts the thin metal plate 10. Is a plan view),
Thereby, it is possible to implement the cutting method according to the present invention.

[0014]

As described above, according to the present invention, in the method for cutting a member to be cut by water jet cutting, in which high-pressure water is jetted from a jet nozzle to the member to be cut to cut the member to be cut, the cutting is performed. A pressing jig that presses the periphery of the cut portion of the member to be cut is disposed, the jig is moved in conjunction with the cutting operation of the jet nozzle, and is moved on the member to be cut. Since the member to be cut is pressed to cut the predetermined cut portion of the member to be cut,
By using a water jet, it is possible to accurately cut and process a plurality of metal thin plates that are stacked, and it is possible to prevent deformation of the cutting pattern.

[Brief description of drawings]

FIG. 1 is a diagram showing a structure of a first embodiment of a pressing jig for explaining a method of cutting a member to be cut by water jet cutting according to the present invention.

FIG. 2 is a diagram for explaining an interlocking operation between the nozzle and the pressing member shown in FIG.

FIG. 3 is a diagram showing a change in cutting width of a member to be cut when the member to be cut is cut depending on whether the holding jig shown in FIG. 1 is used or not used.

FIG. 4 is a view showing a structure of a pressing jig according to a second embodiment similar to FIG.

FIG. 5 is a view showing a structure of a pressing jig according to a third embodiment of the same.

FIG. 6 is a view showing the structure of a pressing jig according to a fourth embodiment of the present invention.

FIG. 7 is a view showing a structure of an example of a holding jig for explaining a conventional method of cutting a member to be cut by water jet cutting.

[Explanation of symbols]

 10 Metal Thin Plate 12 Cutting Head 13 Jet Nozzle 20 Support 21 Pressing Member 22 Upper Lid 23 Lower Lid 24 Moving Mechanism 30 Steel Ball

Claims (1)

[Claims] 1. A method for cutting a member to be cut by water jet cutting, in which high-pressure water is jetted from a jet nozzle to a member to be cut to cut the member to be cut, and the periphery of a cut portion of the member to be cut to be cut. A pressing jig for pressing the cutting target is provided, and the jig is moved on the member to be cut in conjunction with the cutting operation of the jet nozzle, and the member is pressed by the jig to cut the target member. A method of cutting a member to be cut, which comprises cutting a predetermined cut portion of the cutting member.