METHOD AND APPARATUS FOR WATER JET CUTTING
First Claim
1. A water jet cutting method in which a water jet mixed with abrasive is jetted from a nozzle and the nozzle is moved relative to a workpiece to cut the workpiece, comprising the steps of:
- inputting a cutting program as a program for cutting process, a set cutting speed, and cutting parameters including material information of the workpiece and cutting quality;
calculating a calculation cutting speed as a cutting speed matching the cutting quality on the basis of the cutting parameters;
calculating a cutting shape from the cutting program and dividing the cutting shape into a linear portion and a corner portion;
calculating a corner cutting speed for the corner portion on the basis of a shape of the corner portion within a range of from the calculation cutting speed to the set cutting speed, the set cutting speed being equal to or higher than the calculation cutting speed;
performing assignment processing for assigning the set cutting speed and the corner cutting speed as command cutting speeds to the linear portion and the corner portion, respectively, in the cutting program; and
moving the nozzle relative to the workpiece on the basis of the cutting program assigned with the command cutting speeds.
1 Assignment
0 Petitions
Accused Products
Abstract
To control cutting process with cutting quality to obtain product without any uncut portion on a corner portion, and to respond to a change in cutting speed. Water jet cutting performed by: inputting a cutting program, set cutting speed, cutting parameters; calculating cutting speed matching the cutting quality; calculating cutting shape from the cutting program and dividing the cutting shape into a linear portion and a corner portion; calculating a corner cutting speed for the corner portion on the basis of a shape of the corner portion within range from the calculation cutting speed to the set cutting speed, set cutting speed equal to or higher than the calculation cutting speed; set cutting speed and the corner cutting speed to the linear portion and the corner portion, respectively, in the cutting program; moving the nozzle relative to the workpiece on the basis of the cutting program assigned with cutting speeds.
36 Citations
9 Claims
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1. A water jet cutting method in which a water jet mixed with abrasive is jetted from a nozzle and the nozzle is moved relative to a workpiece to cut the workpiece, comprising the steps of:
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inputting a cutting program as a program for cutting process, a set cutting speed, and cutting parameters including material information of the workpiece and cutting quality; calculating a calculation cutting speed as a cutting speed matching the cutting quality on the basis of the cutting parameters; calculating a cutting shape from the cutting program and dividing the cutting shape into a linear portion and a corner portion; calculating a corner cutting speed for the corner portion on the basis of a shape of the corner portion within a range of from the calculation cutting speed to the set cutting speed, the set cutting speed being equal to or higher than the calculation cutting speed; performing assignment processing for assigning the set cutting speed and the corner cutting speed as command cutting speeds to the linear portion and the corner portion, respectively, in the cutting program; and moving the nozzle relative to the workpiece on the basis of the cutting program assigned with the command cutting speeds. - View Dependent Claims (2, 3, 4, 5)
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6. A water jet cutting apparatus comprising:
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a movement mechanism that relatively moves a nozzle and a workpiece; a high-pressure water supply mechanism that supplies high-pressure water to the nozzle; an abrasive supply mechanism that supplies abrasive to the nozzle; and a control device for the movement mechanism, wherein the movement mechanism moves on the basis of a position command received from the control device, and the controller includes; an input unit for inputting a cutting program as a program for cutting process, a set cutting speed, and cutting parameters including material information of the workpiece and cutting quality; a memory unit that stores the cutting program, a calculation program for determining a cutting speed as a speed of relative movement of the nozzle to the workpiece, and a cutting program assigned with the cutting speed, a calculation unit that stores the cutting parameters in the memory unit;
calculates the calculation cutting speed as a cutting speed matching the cutting quality on the basis of the cutting parameters;
calculates a cutting shape from the cutting program;
dividing the cutting shape into a linear portion and a corner portion;
calculates a corner cutting speed for the corner portion on the basis of a shape of the corner portion within a range of from the calculation cutting speed to the set cutting speed, the set cutting speed being equal to or higher than the calculation cutting speed;
assigns the set cutting speed and the corner cutting speed as command cutting speeds to the linear portion and the corner portion, respectively, in the cutting program; and
creates the position command on the basis of the cutting program assigned with the command cutting speeds; anda communication unit that sends the position command to the movement mechanism. - View Dependent Claims (7, 8, 9)
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Specification