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Three-dimensional free bending active bending die motion pose analysis method

An analytical method and a bending die technology, applied in the field of motion pose analysis of a three-dimensional free-bending active bending die, can solve the problems of axis misalignment, affecting the service life of pipeline medium conveying efficiency, etc., achieving a simple and feasible method and important engineering applications Value, avoid the effect of multiple trial and error

Pending Publication Date: 2021-01-26
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The bending components manufactured by the existing technology cannot meet the key technical indicators such as three-dimensional axis accuracy, section distortion rate, and forming integrity at the same time. In the actual service process, wear and axis misalignment often occur due to factors such as strong vibration, corrosion, or mechanical damage. Seriously affect the pipeline medium transmission efficiency and the service life of the catheter

Method used

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  • Three-dimensional free bending active bending die motion pose analysis method
  • Three-dimensional free bending active bending die motion pose analysis method
  • Three-dimensional free bending active bending die motion pose analysis method

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Experimental program
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Effect test

Embodiment 1

[0041] image 3 As a planar bending component with "straight-bending" characteristics, the motion pose analysis method of the three-dimensional free-bending active bending die when forming the part is as follows:

[0042] 1) Before bending and forming, the pipe axis is extracted according to the configuration of the target bending part (1), and the pipe axis is divided into two forming sections and one straight section according to the geometric features (straight line segment-arc line segment), each The forming section is marked as i, and is numbered in sequence: that is, i=①,②,③;

[0043] 2), establish the pipe axis global coordinate system O at the starting point position of the first section of the pipe axis 0 -xyz, extract the space coordinates of the starting point of the straight line, the tangent point of the straight line-arc line and the end point of the arc line of each segment in sequence according to the label sequence of the forming segment: (0,0,0), (0,0,40), (...

Embodiment 2

[0048] Figure 4 It is a space-bending component with "straight-bending" characteristics, and the analysis method for the motion and pose of the three-dimensional free-bending active bending die when forming the part is as follows

[0049] 1) Before bending forming, the pipe axis is extracted according to the configuration of the target bending piece, and the pipe axis is divided into three forming sections according to the geometric features (straight line segment-arc line segment), and each forming segment is marked as i, and according to Sequence label: namely i=①,②,③;

[0050] 2), establish the pipe axis global coordinate system O at the starting point position of the first section of the pipe axis 0 -xyz, extract the space coordinates of the starting point of the straight line, the tangent point of the straight line-arc and the end point of the arc of each segment in sequence according to the label sequence of the forming segment: (0,0,0), (0,0,5), ( 0,10.74,21.44), (0,...

Embodiment 3

[0055] Figure 5 It is a space-bending component with "straight-bending" characteristics, and the analysis method for the motion and pose of the three-dimensional free-bending active bending die when forming the part is as follows

[0056] 1) Before bending forming, the pipe axis is extracted according to the configuration of the target bending part 1, and the pipe axis is divided into three forming sections according to the geometric features (straight line segment-arc line segment), and each forming segment is denoted as i, and Label according to order: i=①,②,③;

[0057] 2), establish the pipe axis global coordinate system O at the starting point position of the first section of the pipe axis 0 -xyz, extract the space coordinates of the starting point of the straight line, the tangent point of the straight line-arc and the end point of the arc of each segment in sequence according to the label sequence of the forming segment: (0,0,0), (0,0,25), ( 0,10,42.32), (0,18.66,47.3...

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Abstract

The invention discloses a three-dimensional free bending active bending die motion pose analysis method which comprises the following steps of in the bending forming process, rotating the axis of a pipe of each forming section to be parallel to the z axis of a global coordinate system, recalculating the coordinates of feature points of the forming section under the global coordinate system on thebasis of a rotation change matrix; and judging the movement direction, the offset distance and the rotation angle of a bending die according to the orientation of the feature points in an x-y plane ofthe global coordinate system, and finally analyzing the pose of the bending die in the bending forming process. The method is a bending die motion pose analysis method matched with an active three-dimensional free bending device, and the advantage that the active three-dimensional free bending device can achieve one-time precise forming of a bending part with a complex space axis is fully played.

Description

technical field [0001] The invention belongs to the technical field of advanced manufacturing of metal complex components, and in particular relates to a three-dimensional free-bending active bending die motion pose analysis method. Background technique [0002] Bending parts with complex spatial configurations are widely used in aerospace, nuclear energy, new energy vehicles and other fields. Serve in the environment. In the actual service process, the heat pipe with a complex axis shape needs to be close to the inner and outer walls of the cabin, and the working temperature is guaranteed through effective heat exchange. If the spatial shape of the axis of the component is not accurate, it will easily lead to poor bonding between the thermally controlled bending component and the bulkhead, reducing heat transfer. efficiency. The bending components manufactured by the existing technology cannot meet the key technical indicators such as three-dimensional axis accuracy, sect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F17/16B21D11/00
CPCG06F30/20G06F17/16B21D11/00
Inventor 程诚郭训忠刘春梅陶杰胡胜寒
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS