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Method for detecting position-independent geometric errors of double rotating shafts of five-axis numerical control machine tool

A technology of numerical control machine tools and detection methods, applied in the direction of measuring/indicating equipment, metal processing machinery parts, metal processing equipment, etc., capable of solving problems such as defects, flaws in processed parts, etc.

Active Publication Date: 2019-05-10
TIANJIN POLYTECHNIC UNIV
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Problems solved by technology

However, the swing axis B axis and the rotation axis C axis introduce more geometric error elements during processing, resulting in flaws and defects in the processed parts

Method used

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  • Method for detecting position-independent geometric errors of double rotating shafts of five-axis numerical control machine tool
  • Method for detecting position-independent geometric errors of double rotating shafts of five-axis numerical control machine tool
  • Method for detecting position-independent geometric errors of double rotating shafts of five-axis numerical control machine tool

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Embodiment Construction

[0068] The specific embodiment of the present invention will be described below in conjunction with the experimental measurement method and the accompanying drawings.

[0069] attached figure 1 Shown is a structural diagram of a five-axis CNC machine tool used in the present invention, based on which the measurement method is described.

[0070] In step 1, the measurement position of the ballbar is determined according to the structure of the five-axis CNC machine tool and the type of the swing axis B axis and the rotation axis C axis. The two balls of the ballbar are magnetically attached to the two tool cups, which are connected to the spindle and the clamp located on the table, including steps:

[0071] Step 1.1. Set a measurement coordinate system that conforms to the experimental measurement method. The Z-axis of the coordinate system coincides with the original Z-axis of the machine tool, and the X-axis and Y-axis of the coordinate system are parallel to the movement d...

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Abstract

The invention discloses a method for detecting position-independent geometric errors of double rotating shafts of a five-axis numerical control machine tool. The method is characterized in that a ballbar is adopted as experimental equipment for identifying the position-independent geometric errors (PIGEs) of the swing shaft B and the rotating shaft C in the five-axis numerical control machine tool; a new measurement track is provided; the problem that asynchronism is caused between the resultant velocity formed when the swing shaft B and the rotating shaft C re in coordinated movement and theacquisition speed of the ball bar is solved; a homogeneous transformation matrix in the rigid body kinematics is combined, and a simulation model is established; and the simulation model is combinedwith experiments, and the position-independent geometric errors of the double rotating shafts of the five-axis numerical control machine tool can be identified and measured. By means of the method, the position-independent geometric errors of the double rotating shafts of the five-axis numerical control machine tool can be rapidly and effectively detected; and the precision is high, and the practicability is good.

Description

technical field [0001] The invention belongs to the technical field of detection of numerical control machine tools, and in particular relates to a detection method for position-independent errors of dual rotary axes of a five-axis numerical control machine tool. technical background [0002] Five-axis CNC machine tools are widely used to process parts with complex geometric features. It has the advantages of improving surface finish and improving material removal rate. Most of the processing conditions rely on the dual rotary axes of the machine tool to make the orientation of the tool change relative to the workpiece, so it has greater flexibility than traditional three-axis processing when generating tool paths. However, the swing axis B axis and the rotation axis C axis introduce more geometric error elements during processing, resulting in flaws and defects in the processed parts. [0003] The study of the inherent errors of the swing axis B-axis and the rotation axis ...

Claims

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Application Information

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IPC IPC(8): B23Q17/00
Inventor 蒋晓耕贾经纬王量姚思涵王浩李晨阳
Owner TIANJIN POLYTECHNIC UNIV
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