Three-axis free bending die and guiding mechanism matching optimization design method

A guiding mechanism and optimized design technology, applied in computing, metal processing equipment, forming tools, etc., can solve the problems of geometric limitations in displacement distance and deflection angle, affecting motion stability, complex assembly structure, etc., and achieve important engineering application value , Increase motion stability, obvious economic benefits

Active Publication Date: 2018-04-13
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS +1
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

These two special connection forms in the three-axis configuration make the mold assembly structure more complex, and at the same time lead to geometric restrictions on the displacement distance and deflection angle of the bending mold during movement
This also leads to th

Method used

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  • Three-axis free bending die and guiding mechanism matching optimization design method
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  • Three-axis free bending die and guiding mechanism matching optimization design method

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Effect test

Embodiment 1

[0040] The outer diameter of the tube blank is D, the target minimum bending radius is 2.5D, and the limit eccentricity of the bending die is 0.7D. In order to determine all the dimensions of the mold, some dimensions that can be calculated from the above basic forming requirement parameters are calculated in advance, and some dimensions that cannot be directly calculated are determined according to empirical values. Therefore, the order of determining the mold size is: (1) Determine the distance A value between the center of the bending die and the front end of the guiding mechanism: (2) Determine some dimensions that cannot be directly calculated according to empirical values: B=2D, R0=1.8D, R1=1.2D, C=0.8D, α=60°; (3) Determine the matching of the bending die and the guide mechanism The spherical radius of the spherical envelope surface: R2 = (B 2 +R1 2 ) / 2R1=2.27D; (4) determine the length of the spherical envelope surface at the end of the bending die: (5) Check the ...

Embodiment 2

[0042] The outer diameter of the tube blank is D, the target minimum bending radius is 3.0D, and the limit eccentricity of the bending die is 0.7D. In order to determine all the dimensions of the mold, some dimensions that can be calculated from the above basic forming requirement parameters are calculated in advance, and some dimensions that cannot be directly calculated are determined according to empirical values. Therefore, the order of determining the mold size is: (1) Determine the distance A value between the center of the bending die and the front end of the guiding mechanism: (2) Determine some dimensions that cannot be directly calculated according to empirical values: B=2.5D, R0=2.0D, R1=1.6D, C=1.0D, α=60°; (3) Make sure that the bending die matches the guide mechanism The spherical radius of the spherical envelope surface: R2 = (B 2 +R1 2 ) / 2R1=2.75D; (4) determine the length of the spherical envelope surface at the end of the bending die: (5) Check the four ...

Embodiment 3

[0044] The outer diameter of the tube blank is D, the target minimum bending radius is 3.5D, and the limit eccentricity of the bending die is 0.7D. In order to determine all the dimensions of the mold, some dimensions that can be calculated from the above basic forming requirement parameters are calculated in advance, and some dimensions that cannot be directly calculated are determined according to empirical values. Therefore, the order of determining the mold size is: (1) Determine the distance A value between the center of the bending die and the front end of the guiding mechanism: (2) Determine some dimensions that cannot be directly calculated according to empirical values: B=2.8D, R0=2.2D, R1=1.8D, C=1.2D, α=60°; (3) Make sure that the bending die matches the guide mechanism The spherical radius of the spherical envelope surface: R2 = (B 2 +R1 2 ) / 2R1=3.07D; (4) determine the length of the spherical envelope surface at the end of the bending die: (5) Check the four ...

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Abstract

The invention discloses a three-axis free bending die and guiding mechanism matching optimization design method and belongs to the technical field of metal plastic forming. The optimization design method is characterized in that the matching form (stand-alone type or straight-line type) is changed into a spherical contact type. Compared with a traditional form, the movement of the bending die in the pipe forming process is more stable under the matching form, the rotating angle theta can be accurately controlled, and the minimum relative bending radius (R/D0) of the three-axis free bending equipment can be reduced to 2.5.

Description

technical field [0001] The invention relates to the field of mold design and assembly of metal plastic forming equipment, in particular to an optimal design method for cooperation between a three-axis free bending mold and a guide mechanism. Background technique [0002] The three-dimensional free bending system can realize high-precision moldless forming of pipes, profiles, and wires under various bending radii without changing the mold. The existing three-dimensional free bending equipment can be divided into three-axis, five-axis and six-axis free bending systems according to the degree of freedom of movement of the bending die. Compared with five-axis and six-axis equipment, the bending mold in the three-axis free bending equipment can only actively realize the translational degrees of freedom in the X and Y directions, while its deflection motion is passive motion, which generally needs to rely on the bending mold and the spherical surface The mutual effect of the matc...

Claims

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Application Information

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IPC IPC(8): G06F17/50B21D37/12
CPCB21D37/12G06F30/17
Inventor 郭训忠马子奇熊昊程怡马燕楠王辉靳凯
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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