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NC Machining Method of Cavity with Complicated and Steep Inner Contour

A processing method and technology of inner contour, applied in the direction of program control, computer control, general control system, etc., can solve problems such as poor practicability and achieve the effect of good practicability

Active Publication Date: 2020-04-10
XIAN KUNLUN IND GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of poor practicability of the existing numerical control machining method for the cavity, the present invention provides a numerical control machining method for the cavity with a complex and steep inner contour surface

Method used

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  • NC Machining Method of Cavity with Complicated and Steep Inner Contour
  • NC Machining Method of Cavity with Complicated and Steep Inner Contour
  • NC Machining Method of Cavity with Complicated and Steep Inner Contour

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Embodiment Construction

[0022] refer to Figure 1-7 . The specific steps of the numerical control machining method of the present invention with a complex and steep inner contour curved surface cavity are as follows:

[0023] The first is to build a closed sheet in the modeling module of UG. Place the geometric model of the part in the first layer and analyze the depth H, outer diameter D, and inner diameter d of the processing part; according to the analyzed dimensions, make an outer diameter D, inner diameter d, and height H+ in the second layer Hollow cylinder of L; copy the part geometry model of the first layer to the third layer, and extract the sheet body of the processing part on the model by extracting the body, hide the part geometry model; influence the contour on the third layer sheet model The straight line segment and arc line segment of the shape are extracted by the method of extracting lines and copied to the fourth layer, and the construction of the closed sheet is completed on th...

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Abstract

The invention discloses a numerical control machining method for a curved cavity with a complex steep inner contour in order to solve the poor practicability of a conventional cavity numerical controlmachining method. The method is characterized by opening a part geometry and a blank geometry model during layer setting, causing a reference cutter to operate at a space outside the part geometry; determining the positions of a line A and a line B, and stretching the line A and the line B along the negative direction of an axis Z into a surface C and a surface E; extracting a sheet body model ofthe machining position of a part, extracting a straight line segment and a circular arc segment on the sheet body model to extend the same to the line A and the line B, and trimming the excess part,and constructing various line segments in the trimmed line frame into a ruled surface and a sweeping curved surface; stitching the surfaces to form an open sheet body, offsetting the surface C and thesurface E into a surface F and the surface G in the direction of the open sheet body; and finally cutting the surface F and the surface G to the open sheet body to form a closed sheet body. The method uses the constructed closed sheet body as the part geometry, and is suitable for the machining of a curved groove with an arbitrary shape, and has good practicability.

Description

technical field [0001] The invention relates to a numerical control machining method for a mold cavity, in particular to a numerical control machining method for a mold cavity with a complex and steep inner contour surface. Background technique [0002] According to the different characteristics of the cavity, the processing methods of the cavity mainly include EDM and CNC machining. The EDM forming speed is slow, the electrode is easy to wear, and the working fluid circulation is difficult, which restricts the application range of the EDM. As an important part of modern manufacturing technology, CNC machining is widely used by enterprises to process complex three-dimensional curved surface cavities. [0003] The long groove cavity is a kind of curved surface cavity, which is characterized in that one of the two sides of the concave cavity is an upright side, the other side is an oblique side, and the bottom surface is an arc surface. [0004] refer to Figure 8 . The docu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/4097
CPCG05B19/4097G05B2219/34183
Inventor 向小霞黄泰庆
Owner XIAN KUNLUN IND GRP