Forge piece adjusting method based on three-dimensional scanning auxiliary positioning

An auxiliary positioning and three-dimensional scanning technology, applied in image data processing, 3D modeling, instruments, etc., can solve problems such as inability to connect organically, and achieve the effect of reducing the difficulty of calibration, shortening the production cycle, and clear calibration results

Active Publication Date: 2021-04-20
SHANGHAI ELECTRIC SHMP CASTING & FORGING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing technical solutions cannot be well organical

Method used

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  • Forge piece adjusting method based on three-dimensional scanning auxiliary positioning
  • Forge piece adjusting method based on three-dimensional scanning auxiliary positioning
  • Forge piece adjusting method based on three-dimensional scanning auxiliary positioning

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0048]Example 1, referenceFigure 1 to 3 :

[0049]A large "bowl" part, the shape is like a bowl, and the "bowl port" is large and the diameter of "bowl" is large. When the measurement is measured, it is guaranteed, and the outside can be measured in the same position. Keep the "bowl" appeared on the machine, and at the same time in the "bowl bottom" site, it is flat, clamping and other operations, the main adjustment of the part is mainly for "bowl port".

[0050]S1 model acquisition:

[0051]According to the principle of "three-point positionable object space position", the feature point should be not less than three points, and the feature points should be asymmetrically distributed, and each feature point should be representative and not repeated. If the feature point is in the small piece of the object, the corresponding coordinate difference is small, the correction is inconvenient, and the deviation of the overall is extremely large after the school is adjusted, and the feature point s...

Example Embodiment

[0067]Example 2, referenceFigure 4 :

[0068]A large thin-walled steel tube, when the march is less than the outer circle, the inner circle is required to determine the axis of the part. The part axis is determined to determine the part axis of both end reference holes in milling machines, and then the parts are required to be processed after correction of the parts.

[0069]Steps S1 and Step S2 are similar to those of the first embodiment, and will not be described herein, note that the feature points B and feature point c should be set at the same truncation limit at this time, reduce the interaction of subsequent modeling, characteristics in this embodiment. Point B and feature point c are set at XZ quadrant.

[0070]S3 determines the school adjustment:

[0071]The steel pipe part is used as a three-dimensional coordinate contrast, ie, ΔX, ΔY, Δz, corresponding to X, Y, Z axial direction. Calculated with standard three-dimensional coordinate, feature point b (x2Y2,Z2) And feature point C (X3...

Example Embodiment

[0076]Example 3, referenceFigure 5 - Figure 7:

[0077]Such asFigure 5 As shown, a plate-shaped part is provided three feature points A, B, C, and feature points in the upper surface.Figure 6 The three-dimensional coordinates in the coordinate system shown in the standard model are A (X1Y1,Z1), B (x2Y2,Z2), C (x3Y3,Z3).

[0078]Place the part blank on the machine table to obtain a three-dimensional coordinate A in the characteristic point in the machine coordinate system (X1'', Y1'',Z1''), B (x2'', Y2'',Z2''), C (x3'', Y3'',Z3').

[0079]The Z-axis coordinate z of each feature point is a vertical distance of the feature point distance X-Y plane. When the part blank has a different horizontal state in the two coordinate systems, its corresponding Z-axis sites (Z1-2,Z1-3) And (z1-2'',Z1-3''). Therefore, first adjust, the z-axis sitting difference between the parts blank in the machine coordinate system (Z1-2'',Z1-3'') Calling to the foregoing (Z1-2,Z1-3) Equality, that is, the part blank has t...

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Abstract

The invention discloses a forge piece adjusting method based on three-dimensional scanning auxiliary positioning. The method comprises the following steps: S1, model acquisition: determining at least three feature points on a part blank, and establishing a standard model and a blank model; s2, data acquisition: superposing and matching the standard model and the blank model, and measuring standard three-dimensional coordinates of the feature points by using a coordinate system of the standard model; placing the part blank on a machine tool, and measuring machine tool coordinates of the feature points; calculating a standard difference value and a machine tool difference value on the axis corresponding to any two feature points; and S3, calibration determination: performing calibration to enable the standard difference value to be close to or equal to the machine tool difference value. According to the invention, through assistance of three-dimensional scanning calculation, the calibration control target is simplified, the calibration result is clearer and predictable, the calibration difficulty of the forged piece is greatly reduced, the production period is shortened, the production cost is reduced, and the shortage risk caused by machining calibration is effectively controlled.

Description

technical field [0001] The invention relates to the technical field of mechanical equipment manufacturing, in particular to a method for calibrating forgings based on three-dimensional scanning assisted positioning. Background technique [0002] With the rapid development of the national equipment manufacturing industry, the demand for forgings continues to rise, and the manufacturing requirements are getting higher and higher, gradually developing towards large-scale and heavy-duty. After the forging of the forging is completed and before the machine tool is processed, it is necessary to confirm the remaining state of the part in advance, and the processing flow can only be continued after ensuring that the size requirements of the drawing are met. [0003] Due to the gradual maturity of the current forging technology, in order to save production costs and corresponding resources, the forging allowance is gradually reduced, and the forging target is getting closer to the sh...

Claims

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Application Information

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IPC IPC(8): G06F30/17G06F30/20G06T17/00
Inventor 许明甲高艳伶黄健
Owner SHANGHAI ELECTRIC SHMP CASTING & FORGING CO LTD
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