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A three-dimensional interference detection method for sheet metal bending process

A sheet metal, three-dimensional technology, applied in the field of three-dimensional interference detection of sheet metal bending process combined with OBB bounding box and geometric algorithm, can solve problems such as interference detection research that has not been reported, and achieve fast detection, high efficiency, accuracy and accuracy high effect

Active Publication Date: 2022-03-29
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

In the face of more complex three-dimensional workpieces and multiple sets of molds, machine tools, robot fixtures, etc., the research on interference detection has not been reported.

Method used

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  • A three-dimensional interference detection method for sheet metal bending process
  • A three-dimensional interference detection method for sheet metal bending process
  • A three-dimensional interference detection method for sheet metal bending process

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Embodiment Construction

[0026] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0027] A three-dimensional interference detection method for sheet metal bending process that combines OBB bounding box and geometric algorithm, which can quickly and accurately calculate the relevant information of interference in the sheet metal bending process, and is used for automatic planning of sheet metal bending process. First, import the bending processing environment and the sheet metal parts to be processed and analyze and extract the vertices of each object; use mathematical methods such as principal component analysis to calculate the minimum OBB bounding box for each processing environment object; use the segmentation method for the characteristics of the sheet metal parts , respectively calculate the minimum OBB bounding box of each sheet metal block, and then connect the bounding box of each plate with a two-way linked list to...

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Abstract

A three-dimensional interference detection method for sheet metal bending process that combines OBB bounding box and geometric algorithm. Environmental objects use mathematical methods such as principal component analysis to calculate the minimum OBB bounding box; according to the characteristics of sheet metal parts, use the segmentation method to calculate the minimum OBB bounding box of each sheet metal block, and then connect the bounding boxes of each plate with a two-way linked list. Form a chain of bounding boxes; Use the simplified space separation axis test method to quickly screen out entities that may interfere; Then, project the screened entities along the z-axis of the machine tool to exclude interference from the left and right ears, and then move along the x-axis of the machine tool Directional projection uses geometric algorithms to calculate interference information. The invention can quickly and accurately calculate the interference position and the interference depth, and solve the interference detection problem in the robot sheet metal bending process planning.

Description

technical field [0001] The present invention relates to an automatic processing technology of sheet metal, especially the interference detection technology of three-dimensional bending of sheet metal, which is used to quickly and accurately detect the interference related information of the current bending process in the planning of sheet metal bending process, specifically A three-dimensional interference detection method for sheet metal bending process combined with OBB bounding box and geometric algorithm. Background technique [0002] Compared with the process planning of two-dimensional bending, three-dimensional sheet metal bending often involves the collaborative processing of multiple sets of molds, the process planning is more flexible, the interference calculation is more complicated, and it is more difficult to generate a feasible or optimal bending process without interference . Among them, the rapid and accurate detection of sheet metal bending interference in ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D5/00B21C51/00B07C5/34
CPCB21D5/006B07C5/34
Inventor 游有鹏周康杨雪峰吕万林
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS