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Drum taper tool and method for side milling complex cambered centrifugal impeller using drum taper tool

A tool and surface technology, applied in milling cutters, milling machine equipment, manufacturing tools, etc., can solve problems such as low tool rigidity, no tool machining position, and harsh tool orientation requirements.

Inactive Publication Date: 2005-01-26
XI AN JIAOTONG UNIV
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  • Claims
  • Application Information

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Problems solved by technology

[0010] In practice, it has been found that the use of conical cutters to process arbitrary curved surfaces has the following defects: 1) This method has strict requirements on the shape of the blade to be processed and the direction of the cutter during processing, and the blade should not be twisted too much, otherwise a suitable tool processing position cannot be found
[0012] Since the impeller channel is a narrow channel, the drum-shaped cutter is used, and the rigidity of the cutter is relatively small, which affects the machining accuracy

Method used

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  • Drum taper tool and method for side milling complex cambered centrifugal impeller using drum taper tool
  • Drum taper tool and method for side milling complex cambered centrifugal impeller using drum taper tool
  • Drum taper tool and method for side milling complex cambered centrifugal impeller using drum taper tool

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Embodiment

[0096] Using the spherical cutter and the drum-conical cutter respectively, the tool path generation in five-coordinate machining of centrifugal impeller blades is discussed. The blade is an arbitrary curved surface, represented by bicubic B-spline. The diameter of the spherical knife used is d c =32mm, diameter of drum cone cutter rod d c =32mm, R=70mm, h=25mm see Figure 7 . The allowable residual height is 0.1mm, and the tool paths in blade machining are calculated for the above two tools respectively.

[0097] Calculated as Figure 13 As shown in Figure 14, the number of trajectories for processing the blade is 16 with a drum-cone cutter, and the total length of the trajectories is 6631mm; while the number of trajectories for a spherical cutter is as many as 39, and the total length of the trajectories is 16453mm, the ratio of the two It is 1:2.5. At the same cutting speed, the processing efficiency of the drum-cone cutter is 2.5 times that of the spherical cutter.

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Abstract

A conic drum-shaped cutting tool and its feed pitch, feed step length and method for calculating the position of cutting tool are disclosed. Its cutting part is a rotary surface. Its generating line is an arc with radius R. Its advantages are high productivity, high rigidity and high rotation flexibility. A method for laternally milling a centrifugal blade wheel with complex curved surface with the said cutting tool is also disclosed, which features less number of tracings, short tracing and high productivity.

Description

1. Technical field [0001] The invention relates to the numerical control machining technology of complex curved surfaces such as complex curved surface impellers in the technical field of mechanical processing and numerical control processing, in particular to a drum-cone cutter and a method for side milling complex curved surfaces by using the drum-cone cutter. 2. Background technology [0002] Impeller machinery is widely used in energy power, aerospace, petrochemical, metallurgy and other industries, and plays a huge role in the national economy and national defense. For example, compressors, blowers, fans and water pumps are typical impeller machinery. The impeller is a key part of turbomachinery. Through its high-speed rotation, the blades do work on the fluid to obtain high-speed and high-pressure fluid. According to the direction of fluid flow, it can be divided into axial flow impeller and centrifugal impeller. In the axial flow impeller, the fluid flows in the axial...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23C3/00B23C3/18B23C5/10
CPCB23C3/18B23C5/10B23C2210/084
Inventor 席光蔡永林王尚锦
Owner XI AN JIAOTONG UNIV
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