Numerical control whirlwind milling method for middle-convex and varying ellipse pistons

A processing method and ellipse-changing technology, which is applied in metal processing equipment, milling machine equipment, manufacturing tools, etc., can solve the problems that the tool is difficult to accurately track the spindle angle, difficult to ensure machining accuracy, and poor stability, and achieves good cutting stability. Equipment cost and low cutting force

Active Publication Date: 2014-03-26
SHANDONG UNIV
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AI Technical Summary

Problems solved by technology

Even so, when the spindle needs to rotate at a higher speed, it is still difficult for the tool to accurately track the spindle angle, the stability is poor, and it is difficult to ensure the machining accuracy

Method used

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  • Numerical control whirlwind milling method for middle-convex and varying ellipse pistons
  • Numerical control whirlwind milling method for middle-convex and varying ellipse pistons
  • Numerical control whirlwind milling method for middle-convex and varying ellipse pistons

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Embodiment Construction

[0037] The present invention is described in detail below in conjunction with accompanying drawing:

[0038] like Figure 1-2 As shown, the workpiece 3 is clamped on the machine tool spindle 1, and the rotary axis of the cutter head 2 on the whirlwind milling head is parallel to the machine tool spindle 1; several cutting tools 4 can be installed on the cutter head 2 and can rotate at high speed under the drive of the motor ; The center of the inscribed circle of the tool tip of the tool 4 is on the axis of rotation of the cutter head 2, and its diameter is greater than the maximum diameter of the workpiece 3. The linear motion of the cutter head 2 along the axial direction of the workpiece (Z axis), the linear motion of the radial direction of the workpiece (X axis) and the rotation angle of the machine tool spindle 1 (C axis) can be precisely controlled. During processing, the spindle 1 drives the workpiece 3 to rotate (feed in the C direction), and the cutter head 2 drives...

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Abstract

The invention discloses a numerical control whirlwind milling method for middle-convex and varying ellipse pistons. The method comprises the following steps of inputting parameters: the design size and the technical requirements of a workpiece are input into a numerical control system; selecting a cutting tool and calculating the tool path data via the numerical control system according to the input parameters in step one to determine the linkage tool path data of C, Z and X axes of a machining tool; checking the tool path data via a simulation module; clamping and positioning; machining, starting a numerical control machining procedure, using a motor to drive a cutter head to revolve at high speed, and simultaneously controlling the spindle of the machine tool to drive the workpiece for C axis movement; controlling the cutter head for Z axis and X axis movement, and obtaining the outer surface of the piston through the linkage machining of C, X and Y axes. The method adopts the whirlwind milling process to machine the middle-convex and varying ellipse piston; the machine tool has the advantages of high movement accuracy and good dynamic stability. The method is easy to realize the accurate control to the machining process, and does not require corresponding high-frequency actuating mechanisms such as a linear motor, a magnetostrictive actuator and the like; therefore, the equipment cost is reduced.

Description

technical field [0001] The invention relates to the field of numerical control machining of parts, in particular to a numerical control cyclone milling method for a convex variable ellipse piston. Background technique [0002] The piston is a key part of the car engine, and it is also one of the parts with the worst working conditions in the engine. Considering factors such as uneven material distribution of the piston itself and irregular deformation due to heating, in order to ensure that it is as approximately circular as possible in the working environment, the pistons of medium and high speed engines at room temperature are usually designed to be convex and elliptical: Viewed from the longitudinal section, it is drum-shaped; viewed from the cross-section, it is approximately elliptical. The convex and variable ellipse piston can effectively reduce the friction with the cylinder wall and improve the service life of the piston. However, this complex shape also brings gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23C3/00
Inventor 刘日良
Owner SHANDONG UNIV
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