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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 organically linked with machining, and assist machining for part positioning

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

Embodiment 1

[0048] Embodiment 1, reference Figure 1 to Figure 3 :

[0049] A large "bowl-shaped" part, which is shaped like a bowl, and the diameter of the "bowl mouth" and "bowl bottom" is quite different. When measuring on a vertical lathe, in order to ensure that the inside and outside can be measured at the same station, it is necessary to Keep the "bowl mouth" facing up and place it on the machine tool. At the same time, perform operations such as padding and clamping on the "bowl bottom" part. The calibration of this part is mainly for the "bowl mouth" position.

[0050] S1 model acquisition:

[0051] S10 According to the principle of "three points can locate the spatial position of an object", the feature points should not be less than three points, and the feature points should be distributed as evenly and symmetrically as possible, and each feature point should be representative and not repeated. If the feature points are collected in a small area of ​​the object, the correspo...

Embodiment 2

[0067] Embodiment 2, refer to Figure 4 :

[0068] A large thin-walled steel pipe. When the allowance is small, it is necessary to take into account the allowance of the inner circle before machining the outer circle on the horizontal lathe to determine the axis of the part. Now it is planned to use the milling machine to process the reference holes at both ends to determine the axis of the part, and it is necessary to correct the part on the workbench before processing.

[0069] Steps S1 and S2 are similar to Embodiment 1, and will not be repeated here. Note that feature point b and feature point c should be set in the same tectonic quadrant as much as possible at this time, so as to reduce the interactive influence of subsequent adjustments. In this embodiment, the feature Point b and feature point c are set in the x-z quadrant.

[0070] S3 confirms calibration:

[0071] The steel pipe part uses a three-dimensional coordinate comparison, that is, ΔX, ΔY, and ΔZ in the cor...

Embodiment 3

[0076] Embodiment 3, refer to Figure 5-Figure 7 :

[0077] Such as Figure 5 As shown, a plate-shaped part, three feature points a, b, c are set on the upper surface, and the feature points are at Image 6 The three-dimensional coordinates in the coordinate system of the standard model shown are a(X 1 , Y 1 ,Z 1 ), b(X 2 , Y 2 ,Z 2 ), c(X 3 , Y 3 ,Z 3 ).

[0078] Place the part blank on the machine tool table to obtain the three-dimensional coordinates a(X 1 '', Y 1 '',Z 1 ''), b(X 2 '', Y 2 '',Z 2 ''), c(X 3 '', Y 3 '',Z 3 '').

[0079] The Z-axis coordinate Z of each feature point is the vertical distance from the feature point to the X-Y plane. When the part blank has different horizontal states in the two coordinate systems, the corresponding Z-axis coordinate difference (Z 1-2 ,Z 1-3 ) and (Z 1-2 '',Z 1-3 '') vary. Therefore, the horizontal adjustment is performed first, and the Z-axis coordinate difference (Z 1-2 '',Z 1-3 '') adjusted to the af...

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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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