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Envelope Die Design Method for Improving the Forming Accuracy of Spatial Envelope under Linear Trajectory

A technology of mold design and trajectory, applied in the direction of design optimization/simulation, etc., to achieve the effect of high precision, simple method, and guarantee of formability and forming accuracy

Active Publication Date: 2022-07-19
WUHAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are no reports at home and abroad on the enveloping die design method to improve the accuracy of the space enveloping forming of thin-walled and high-reinforced components under a straight line trajectory

Method used

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  • Envelope Die Design Method for Improving the Forming Accuracy of Spatial Envelope under Linear Trajectory
  • Envelope Die Design Method for Improving the Forming Accuracy of Spatial Envelope under Linear Trajectory
  • Envelope Die Design Method for Improving the Forming Accuracy of Spatial Envelope under Linear Trajectory

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Embodiment Construction

[0045] In order to have a clearer understanding of the technical features, objects and effects of the present invention, the specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0046] This example is for a member with two S-shaped high ribs on a plate, such as figure 1 As shown, the present invention is used to design the enveloping die for the space enveloping forming under the linear trajectory. The shape design method of the envelope mode includes the following steps:

[0047] S1, such as figure 1 As shown, take the geometrical midpoint O of the highest plane on the upper surface of the member to be formed as the coordinate origin, take the horizontal plane passing through the O point as the xy plane, and take any straight line passing through the O point in the plane as the axis of rotation, and take the axis of rotation as X The axis and the rotation axis are fixed during the envelope forming proce...

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Abstract

The invention relates to a method for designing an envelope die for improving the forming accuracy of a space envelope under a straight line trajectory, comprising the following steps: S1. Taking the geometric midpoint O of the highest plane on the upper surface of a component as the coordinate origin, an O-xyz rectangular coordinate system is established; S2 , Based on the design principle of the enveloping mold generated by the component inversion method, the component performs a linear reciprocating rocking motion around the rotation axis; S3, discrete and extract the coordinates of the upper surface points of the component, and put them into the set V1; S4, put the points in the S3 set V1 Set according to the movement in S2, obtain the point set V1' under different rotation angles, this set is the overall point cloud in the process of component reversal movement, and the point cloud on its upper surface is the envelope mold; S5, using the boundary extraction algorithm , the upper surface points are extracted from the V1' point set and put into the point set V2, and the point set V2 is the surface point of the envelope mold under the straight line trajectory. The enveloping mold obtained by the method of the invention does not interfere with the upper surface of the component, thereby improving the forming precision of the component space envelope.

Description

technical field [0001] The invention relates to the technical field of space envelope forming, and more particularly, to an envelope die design method for improving the precision of the space envelope forming under a straight line trajectory. Background technique [0002] Spatial envelope forming refers to a plastic forming method in which the complex shape of the component is enveloped by the complex spatial motion of the envelope die during the relative movement of the envelope die and the component. Spatial envelope forming has the characteristics of small forming force, high material utilization rate, good forming accuracy, and good metal streamline can be obtained. [0003] In the process of spatial envelope forming, according to the different motion trajectories of any point on the envelope die, the spatial envelope forming can be divided into linear trajectory and circular trajectory. In the process of linear trajectory space envelope forming, the envelope die makes ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20
Inventor 韩星会华林杨思伟
Owner WUHAN UNIV OF TECH
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