CN110631535A - Machining reference transmission method for large casting cabin type structural part - Google Patents
Machining reference transmission method for large casting cabin type structural part Download PDFInfo
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- CN110631535A CN110631535A CN201910822887.5A CN201910822887A CN110631535A CN 110631535 A CN110631535 A CN 110631535A CN 201910822887 A CN201910822887 A CN 201910822887A CN 110631535 A CN110631535 A CN 110631535A
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- positioning
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/04—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness by measuring coordinates of points
- G01B21/042—Calibration or calibration artifacts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/20—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring contours or curvatures, e.g. determining profile
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- General Physics & Mathematics (AREA)
- Numerical Control (AREA)
Abstract
The invention relates to a method for transferring a large casting cabin type structural component machining datum. Processing positioning surfaces and positioning holes on the two positioning blocks to be used as a reference for three-dimensional scanning; carrying out three-dimensional scanning by taking the positioning surface and the positioning hole as references; comparing and fitting the scanning result with the casting model so that the scanning data can completely envelop the casting model; recording coordinate rotation and translation data when the scanning result is converted into a casting model, and providing the relation of positioning holes on positioning blocks before and after fitting for machining; and machining the positioning surface and the positioning hole according to the coordinate relation after the coordinate rotation and the translation. The invention applies the three-dimensional scanning means to the determination of machining reference, thus fundamentally avoiding unsafe factors when the cast cabin structural parts are scribed; the method not only can save a bench worker marking link, but also can ensure that the horizontal symmetry center determined by the method is more consistent with a casting object, and can avoid the uncertainty of subsequent borrowing.
Description
Technical Field
The invention belongs to the technical field of part machining benchmarks, and particularly relates to a machining benchmark transmission method for large-scale casting cabin type structural parts.
Background
According to the traditional machining scheme of large-scale casting cabin structural parts, after castings are put into a factory, a bench worker needs to perform scribing to determine a horizontal symmetry center to provide a reference for follow-up, and whether all relevant characteristics of the castings meet machining requirements is checked. As the external dimension of the casting at the front section of the interstage casing reaches 1400mm multiplied by 700mm, the weight of the blank reaches 500Kg, the bench worker is difficult to line and has safety risk. Meanwhile, the horizontal symmetry center is determined only according to the shape and the inner cavity of the end frame by the bench worker, so that the center needs to be adjusted subsequently, and the quality risk exists.
Disclosure of Invention
Technical problem to be solved
The invention provides a machine-to-datum transmission method for large-scale casting cabin type structural components, and aims to solve the technical problem of accurately transmitting machine-to-datum transmission.
(II) technical scheme
In order to solve the technical problem, the invention provides a machining reference transmission method for large-scale casting cabin type structural components, which comprises the following steps:
s1, adhering two positioning blocks to the approximately horizontal position on the end face of the part, and processing positioning surfaces and positioning holes on the two positioning blocks as the reference of three-dimensional scanning;
s2, carrying out three-dimensional scanning by taking the positioning surface and the positioning hole as references;
s3, comparing and fitting the scanning result with the casting model, so that the scanning data can completely envelop the casting model;
s4, recording coordinate rotation and translation data when the scanning result is converted into a casting model, and providing the relation of positioning holes on the positioning blocks before and after fitting for machining;
s5, machining a positioning surface and a positioning hole according to the coordinate relation after coordinate rotation and translation;
s6, carrying out secondary scanning by taking the machined positioning surface and positioning hole as a reference, and comparing to ensure that the reference of secondary machining is accurate; if not, repeating the steps until the requirements are met;
and S7, transferring the new reference to the part body, and starting machining.
(III) advantageous effects
The invention provides a method for transferring a large-scale casting cabin type structural component with a datum, which is characterized in that two positioning blocks are adhered to the approximately horizontal positions on the end surface of a component, and positioning surfaces and positioning holes are processed on the two positioning blocks to be used as the datum for three-dimensional scanning; carrying out three-dimensional scanning by taking the positioning surface and the positioning hole as references; comparing and fitting the scanning result with the casting model so that the scanning data can completely envelop the casting model; recording coordinate rotation and translation data when the scanning result is converted into a casting model, and providing the relation of positioning holes on positioning blocks before and after fitting for machining; and machining the positioning surface and the positioning hole according to the coordinate relation after the coordinate rotation and the translation.
The invention applies the three-dimensional scanning means to the determination of machining reference, thus fundamentally avoiding unsafe factors when the cast cabin structural parts are scribed; by adopting the method, a bench worker marking link can be omitted, and the horizontal symmetry center determined by the method is more consistent with a casting object, so that the uncertainty of subsequent borrowing can be avoided; meanwhile, the problem of thin wall of the V-shaped structural part at the front section of the interstage casing can be found in advance.
Detailed Description
In order to make the objects, contents and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be given in conjunction with examples.
The embodiment provides a machining reference transmission method for large-scale casting cabin type structural components, which specifically comprises the following steps:
s1, adhering two positioning blocks to the approximately horizontal position on the end face of the part, and processing positioning surfaces and positioning holes on the two positioning blocks as the reference of three-dimensional scanning;
s2, carrying out three-dimensional scanning by taking the positioning surface and the positioning hole as references;
s3, comparing and fitting the scanning result with the casting model, so that the scanning data can completely envelop the casting model; if casting problems are found, the casting problems can be timely fed back to a casting manufacturer;
s4, recording coordinate rotation and translation data when the scanning result is converted into a casting model, and providing the relation of positioning holes on the positioning blocks before and after fitting for machining;
s5, machining a positioning surface and a positioning hole according to the coordinate relation after coordinate rotation and translation;
s6, carrying out secondary scanning by taking the machined positioning surface and positioning hole as a reference, and comparing to ensure that the reference of secondary machining is accurate; if not, repeating the steps until the requirements are met;
and S7, transferring the new reference to the part body, and starting machining.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (1)
1. A machining reference transmission method for large-scale casting cabin type structural components is characterized by comprising the following steps:
s1, adhering two positioning blocks to the approximately horizontal position on the end face of the part, and processing positioning surfaces and positioning holes on the two positioning blocks as the reference of three-dimensional scanning;
s2, carrying out three-dimensional scanning by taking the positioning surface and the positioning hole as references;
s3, comparing and fitting the scanning result with the casting model, so that the scanning data can completely envelop the casting model;
s4, recording coordinate rotation and translation data when the scanning result is converted into a casting model, and providing the relation of positioning holes on the positioning blocks before and after fitting for machining;
s5, machining a positioning surface and a positioning hole according to the coordinate relation after coordinate rotation and translation;
s6, carrying out secondary scanning by taking the machined positioning surface and positioning hole as a reference, and comparing to ensure that the reference of secondary machining is accurate; if not, repeating the steps until the requirements are met;
and S7, transferring the new reference to the part body, and starting machining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910822887.5A CN110631535A (en) | 2019-09-02 | 2019-09-02 | Machining reference transmission method for large casting cabin type structural part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910822887.5A CN110631535A (en) | 2019-09-02 | 2019-09-02 | Machining reference transmission method for large casting cabin type structural part |
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| CN110631535A true CN110631535A (en) | 2019-12-31 |
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| CN201910822887.5A Pending CN110631535A (en) | 2019-09-02 | 2019-09-02 | Machining reference transmission method for large casting cabin type structural part |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111307062A (en) * | 2020-02-03 | 2020-06-19 | 北京百慕航材高科技有限公司 | Transfer method for machining casting datum |
| CN112685858A (en) * | 2020-12-31 | 2021-04-20 | 上海电气上重铸锻有限公司 | Forging piece correcting and adjusting method based on three-dimensional scanning auxiliary positioning |
| CN114211206A (en) * | 2021-12-22 | 2022-03-22 | 北京星航机电装备有限公司 | Method for processing multi-cavity casting cabin body of revolving body |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111307062A (en) * | 2020-02-03 | 2020-06-19 | 北京百慕航材高科技有限公司 | Transfer method for machining casting datum |
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| CN112685858A (en) * | 2020-12-31 | 2021-04-20 | 上海电气上重铸锻有限公司 | Forging piece correcting and adjusting method based on three-dimensional scanning auxiliary positioning |
| CN114211206A (en) * | 2021-12-22 | 2022-03-22 | 北京星航机电装备有限公司 | Method for processing multi-cavity casting cabin body of revolving body |
| CN114211206B (en) * | 2021-12-22 | 2022-10-25 | 北京星航机电装备有限公司 | Method for processing multi-cavity casting cabin body of revolving body |
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Application publication date: 20191231 |