Tool trajectory for 5-axis machining of impeller parts
Die am häufigsten verwendete Überprüfungsmethode für die 5-Achsen-Bearbeitung von Laufradteilen ist: Methode zur Überprüfung der Werkzeugweganzeige. Das heißt, ein Drahtrahmen von Werkzeugpositionsdaten (Werkzeugmittelpunktkoordinaten und Werkzeugachsenvektor) wird angezeigt, um zu bestimmen, ob der Werkzeugweg kontinuierlich ist, und um zu überprüfen, ob die Werkzeugpositionsberechnung korrekt ist. Zeigen Sie dann die Werkzeugpositionsdaten zusammen mit dem Drahtgitter der bearbeiteten Oberfläche an, um zu beurteilen, ob der Werkzeugweg korrekt ist, ob der Werkzeugweg und der Vor- und Rückzugsweg angemessen sind.
Die Grundidee ist:
Nehmen Sie alle Bearbeitungsoberflächen und zugehörigen Profile aus den Oberflächenmodellierungsergebnissen heraus, nehmen Sie die Werkzeugweginformationen aus dem Ergebnis der Werkzeugpositionsberechnung (Werkzeugpositionsdatei) heraus und kombinieren Sie sie zur Anzeige. Oder platzieren Sie das Werkzeugmodell auf dem ausgewählten Werkzeugpunkt und verschieben Sie das Werkzeugmodell entlang der Trajektorie. Daher wird beurteilt, ob die Position des Werkzeugkerns auf dem Werkzeugweg, der Vektor der Werkzeugachse, die relative Position des Werkzeugs und die zu bearbeitende Oberfläche und das Verfahren zum Vorschieben und Zurückziehen angemessen sind.
I. Verification of tool path display
Verification method for blade position trajectory display of impeller blades: After the NC machining program of the impeller blade is generated, the tool position trajectory is displayed on the graphic display to judge whether the tool position trajectory is correct. Among them, the feed speed, tool selection, program line number and other information in the CNC machining program should be removed first, and only the verification information should be displayed. Then perform "inverse post processing" on the tool path information to obtain the NC machining program containing the tool path information, and then draw the tool path. Now explain this with a few lines of a four-coordinate CNC machining program for processing the inlet and outlet sides of the large impeller:
N0005X-25.875Y34.678Z34.78A26.68F200N0006X-29.911Y34.789Z35.067A28.98N0007X-34.023Y34.987Z35.453A31.45
的 The three coordinate values X, Y, and Z in this program are the values after the rotary table is rotated by A angle. If you want to find the tool position coordinates when processing this point, you should perform the following "inverse post processing" calculation
X1 = xy1 = ycos (-A) + zsin (-A) z1 = -ysin (-A) + zcos (-A)
The calculated (x1, y1, z1) is the coordinates of the tool position point, and the tool path can be drawn with this tool position file.
Judgment principle of tool path display verification:
1. Whether the tool position trajectory is continuous;
2, Whether the tool path is smoothly connected;
3. Whether the tool path crosses;
4.Is an empty trip necessary?
5.Is there any sudden change in the knife axis vector?
6.Whether the connection of the tool path at the bump is reasonable;
7.Whether the tool path is reasonable when machining the combined surface;
8. Whether the cutting direction matches the shape of the surface.
II. Combination display verification of machining surface and tool path
Basic method of combined display verification:
Display the tool path and the wireframe of the machining surface on the graphic display at the same time, so as to judge whether the tool path is correct, the tool path, and the advance and retreat method are reasonable.
Judgment principle of combined display verification method:
1. Whether the relative position of the tool path and the machining surface is reasonable;
2. Whether the offset direction of the tool path meets the actual requirements?
3.Is there any interference between the tool and the machining surface?
4. Is the advance and retreat knife position and method reasonable?
In summary, the display verification method is a method suitable for verifying the tool position trajectory of the impeller blade profile, especially the blade tip and root fillet. It is intuitive, easy to implement, and especially accurate to observe from three coordinate directions when rotating on a computer monitor.
Die Grundidee ist:
Nehmen Sie alle Bearbeitungsoberflächen und zugehörigen Profile aus den Oberflächenmodellierungsergebnissen heraus, nehmen Sie die Werkzeugweginformationen aus dem Ergebnis der Werkzeugpositionsberechnung (Werkzeugpositionsdatei) heraus und kombinieren Sie sie zur Anzeige. Oder platzieren Sie das Werkzeugmodell auf dem ausgewählten Werkzeugpunkt und verschieben Sie das Werkzeugmodell entlang der Trajektorie. Daher wird beurteilt, ob die Position des Werkzeugkerns auf dem Werkzeugweg, der Vektor der Werkzeugachse, die relative Position des Werkzeugs und die zu bearbeitende Oberfläche und das Verfahren zum Vorschieben und Zurückziehen angemessen sind.
I. Verification of tool path display
Verification method for blade position trajectory display of impeller blades: After the NC machining program of the impeller blade is generated, the tool position trajectory is displayed on the graphic display to judge whether the tool position trajectory is correct. Among them, the feed speed, tool selection, program line number and other information in the CNC machining program should be removed first, and only the verification information should be displayed. Then perform "inverse post processing" on the tool path information to obtain the NC machining program containing the tool path information, and then draw the tool path. Now explain this with a few lines of a four-coordinate CNC machining program for processing the inlet and outlet sides of the large impeller:
N0005X-25.875Y34.678Z34.78A26.68F200N0006X-29.911Y34.789Z35.067A28.98N0007X-34.023Y34.987Z35.453A31.45
的 The three coordinate values X, Y, and Z in this program are the values after the rotary table is rotated by A angle. If you want to find the tool position coordinates when processing this point, you should perform the following "inverse post processing" calculation
X1 = xy1 = ycos (-A) + zsin (-A) z1 = -ysin (-A) + zcos (-A)
The calculated (x1, y1, z1) is the coordinates of the tool position point, and the tool path can be drawn with this tool position file.
Judgment principle of tool path display verification:
1. Whether the tool position trajectory is continuous;
2, Whether the tool path is smoothly connected;
3. Whether the tool path crosses;
4.Is an empty trip necessary?
5.Is there any sudden change in the knife axis vector?
6.Whether the connection of the tool path at the bump is reasonable;
7.Whether the tool path is reasonable when machining the combined surface;
8. Whether the cutting direction matches the shape of the surface.
II. Combination display verification of machining surface and tool path
Basic method of combined display verification:
Display the tool path and the wireframe of the machining surface on the graphic display at the same time, so as to judge whether the tool path is correct, the tool path, and the advance and retreat method are reasonable.
Judgment principle of combined display verification method:
1. Whether the relative position of the tool path and the machining surface is reasonable;
2. Whether the offset direction of the tool path meets the actual requirements?
3.Is there any interference between the tool and the machining surface?
4. Is the advance and retreat knife position and method reasonable?
In summary, the display verification method is a method suitable for verifying the tool position trajectory of the impeller blade profile, especially the blade tip and root fillet. It is intuitive, easy to implement, and especially accurate to observe from three coordinate directions when rotating on a computer monitor.
