CN112817270B - High-precision end face control process for steel member - Google Patents
High-precision end face control process for steel member Download PDFInfo
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- CN112817270B CN112817270B CN202011576964.2A CN202011576964A CN112817270B CN 112817270 B CN112817270 B CN 112817270B CN 202011576964 A CN202011576964 A CN 202011576964A CN 112817270 B CN112817270 B CN 112817270B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/401—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by control arrangements for measuring, e.g. calibration and initialisation, measuring workpiece for machining purposes
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Abstract
The invention provides a high-precision end face control process for a steel member, which relates to the technical field of steel structure manufacturing and processing and comprises the steps of correcting a large-section steel member needing end milling and ensuring that each inspection size is within an allowable deviation range; three-dimensional scanning is carried out on the steel member by using a virtual and real equipment three-dimensional scanner, and a three-dimensional model is acquired; carrying out best fit comparison on a theoretical model of the steel member and a actually scanned three-dimensional model by taking the main control size of the steel member as a main alignment mode; determining the end milling amount of 8 angular points through the data obtained by the best fitting, and taking the end milling amount as tool setting data during end milling; carrying out omnibearing attitude adjustment before end milling of a steel member, end milling a first surface, and adjusting the feed quantity of 4 angular points of the end surface to be consistent with tool setting data; and end milling the second surface. The invention utilizes the modern high-tech scanning and measuring technology to ensure the processing precision of the steel member and improve the reliability of end milling of the steel member.
Description
Technical Field
The invention relates to a high-precision end face control process for a steel member, and belongs to the technical field of steel structure manufacturing and machining.
Background
Along with the vigorous development of steel structure buildings, the requirements on machining precision are higher and higher, the structural types are more and more complex, and in the manufacturing and machining of the large-section steel member type in seamless abutting connection, in order to ensure that the end faces of the members are in full contact, force transmission is reliable, and the end face processing of the members is carried out by adopting an end face milling machining method according to the standard regulation. And during the end face milling, according to the technological requirement, all need draw out accurate end face milling processing line (end milling line) and guarantee the end milling precision, traditional end face milling processing has following defect: the end milling machine moves according to the marking, and when the length of the steel member is longer, the deviation of a little point of the milling angle of the end can cause the large-amplitude deviation of the size of the other end of the steel member.
The present application was made based on this.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a high-precision end face control process for a steel member, which improves the machining precision.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a high-precision end face control process for a steel member comprises the following steps:
(1) correcting a large-section steel member needing end milling to ensure that each inspection size is within an allowable deviation range;
(2) three-dimensional scanning is carried out on the steel member by using a virtual and real equipment three-dimensional scanner, and a three-dimensional model is acquired;
(3) carrying out best fit comparison on a theoretical model of the steel member and a actually scanned three-dimensional model by taking the main control size of the steel member as a main alignment mode; the comparison here is performed in existing software, and the best-fit comparison is automatically generated according to the existing software.
(4) Determining the end milling amount of 8 angular points through the data obtained by the best fitting, and taking the end milling amount as tool setting data during end milling;
(5) carrying out omnibearing attitude adjustment before end milling of the steel member, end milling a first surface, and adjusting the feed quantity of 4 angular points of the end surface to be consistent with the tool setting data in the step (4);
(6) and (4) when the end milling is carried out for the second surface, carrying out all-dimensional attitude adjustment again, and adjusting the feed quantity of 4 angular points of the end surface to be consistent with the tool setting data in the step (4).
Before two face end mills of steel member, all-round attitude adjustment is carried out, when can guaranteeing the precision, the end mill of second face does not receive the influence of preceding face end mill.
Further, in order to obtain better accuracy, the all-directional posture adjustment comprises a coarse adjustment process and a fine adjustment process;
coarse adjustment: placing a steel member on a horizontal working table, adjusting an end milling surface to be vertical to the ground by using a line weight, and then, performing left-right adjustment on the end milling surface by using a cutter head, and preliminarily adjusting the end milling surface to be parallel to an end milling working plane;
fine adjustment: setting one angular point as an end milling 0 point according to the end milling quantity data of 4 angular points of one end face in the step (4), obtaining a relative deviation value of the other 3 points from the 0 point, using a dial gauge to perform tool setting and adjustment on the other three points according to the deviation value, and finally adjusting until the relative deviation values of the 4 angular points are consistent with the end milling quantity data.
Furthermore, after the dial indicator on the milling head is used for aligning one of the corner points, the tool setting is set to be 0, and the tool feeding amount is used as the end milling amount according to the end milling amount data of the corner point obtained in the step (4).
The principle and the beneficial technical effects of the invention are as follows:
(1) the invention utilizes the modern high-tech scanning and measuring technology to ensure the processing precision of the steel member, improve the reliability of end milling of the steel member and avoid the situation that the dimension of the other end of the steel member is greatly deviated due to the deviation of a little point of the milling angle of the end when the length of the steel member is longer.
(2) The invention reduces the error caused by artificial measurement calculation adjustment, and the adjustment is directly carried out according to the tool setting data obtained by analysis, thereby being efficient.
(3) The high-precision control of the invention can control the length size deviation of the end-milled steel member within 0.6mm, the end face angle size deviation within 0.3mm and the end face planeness within 0.3 mm.
Drawings
FIG. 1 is an isometric view of the main body structure of a steel member of the present invention;
FIG. 2 is a schematic diagram of end milling and dotting of a main body structure of a steel member
FIG. 3 is a schematic diagram I of the end milling cutter feed amount of the main structure of the steel member;
FIG. 4 is a schematic diagram of the end milling cutter-feeding amount of the main body structure of the steel member.
Description of the labeling: a steel member main structure 1 and an end face 2.
Detailed Description
In order to make the technical means and technical effects achieved by the technical means of the present invention more clearly and more perfectly disclosed, the following embodiments are provided, and the following detailed description is made with reference to the accompanying drawings:
as shown in fig. 1 to 4, the process for controlling the end face of the steel member with high precision of the embodiment comprises the following steps:
(1) correcting a large-section steel member needing end milling to ensure that each inspection size is within an allowable deviation range;
(2) three-dimensional scanning is carried out on the steel member by using a virtual and real equipment three-dimensional scanner, and a three-dimensional model is acquired;
(3) carrying out best fit comparison on a theoretical model of the steel member and a actually scanned three-dimensional model by taking the main control size of the steel member as a main alignment mode;
(4) determining the end milling amount of 8 angular points A1-A8 through the data obtained by the best fitting, and taking the end milling amount as tool setting data during end milling;
(5) and (3) adjusting the posture of the steel member during end milling, namely, end milling the first surface, and adjusting the feed amount of 4 points A1-A4 (in the figures 3 and 4, L1-L4 are the end milling feed amount) to be consistent with the analyzed data (the tool setting data obtained in the step (4)).
(6) And (3) readjusting the posture of the steel member when the second surface is end milled, and similarly adjusting the feed amount of the 4 points A5-A8 (L5-L8 in the figures 3 and 4 are end milling feed amounts) to be consistent with the data obtained by analysis (the tool setting data obtained in the step (4)).
The all-round posture adjustment of the steel member comprises a coarse adjustment process and a fine adjustment process: a. coarse adjustment: placing a steel member on a horizontal working table surface, adjusting an end milling surface to be vertical to the ground by using a line weight, and then, performing left-right adjustment on the end milling surface by using a cutter head, and preliminarily adjusting the end milling surface to be parallel to an end milling working plane; b. fine adjustment: setting one of the angle points as an end milling 0 point according to the provided end milling amount data of the 4 angle points, obtaining relative deviation values of the other 3 points at the 0 point, carrying out tool setting and adjustment on the other three points by using a dial gauge according to the deviation values, and finally adjusting the relative deviation values of the 4 points to be consistent with the provided numerical values.
Setting one of the corner points to be 0 after aligning the tool through a dial indicator on the milling head, and taking the feed amount as the end milling amount according to the data of the corner point obtained by analysis.
The invention utilizes the modern high-tech scanning and measuring technology to ensure the processing precision of the steel member, and the length size deviation of the end-milled steel member is controlled within 0.6mm, the end face angle size deviation is controlled within 0.3mm, and the end face planeness is controlled within 0.3 mm.
While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiments of the invention, it is to be understood that the invention is not to be limited to the disclosed embodiments, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (2)
1. A high-precision end face control process for a steel member is characterized by comprising the following steps:
(1) correcting a large-section steel member needing end milling to ensure that each inspection size is within an allowable deviation range;
(2) three-dimensional scanning is carried out on the steel member by using a virtual and real equipment three-dimensional scanner, and a three-dimensional model is acquired;
(3) carrying out best fit comparison on a theoretical model of the steel member and a actually scanned three-dimensional model by taking the main control size of the steel member as a main alignment mode;
(4) determining the end milling amount of 8 angular points through the data obtained by the best fitting, and taking the end milling amount as tool setting data during end milling;
(5) carrying out all-dimensional attitude adjustment before end milling of the steel member, end milling a first surface, and adjusting the feed quantity of 4 angular points of the end surface to be consistent with the tool setting data in the step (4);
(6) when the end milling is carried out for the second surface, the omnibearing attitude adjustment is carried out again, and the tool feeding amount of 4 angular points of the end surface is adjusted to be consistent with the tool setting data in the step (4);
the omnibearing posture adjustment comprises two processes of coarse adjustment and fine adjustment;
coarse adjustment: placing a steel member on a horizontal working table surface, adjusting an end milling surface to be vertical to the ground by using a line weight, and then, performing left-right adjustment on the end milling surface by using a cutter head, and preliminarily adjusting the end milling surface to be parallel to an end milling working plane;
fine adjustment: setting one angular point as an end milling 0 point according to the end milling quantity data of 4 angular points of one end face in the step (4), obtaining a relative deviation value of the other 3 points from the 0 point, using a dial gauge to perform tool setting and adjustment on the other three points according to the deviation value, and finally adjusting until the relative deviation values of the 4 angular points are consistent with the end milling quantity data.
2. A high-precision end face control process for a steel member as claimed in claim 1, wherein: setting the tool to be 0 after aligning one of the corner points through a dial indicator on the milling head, and taking the feed amount as the end milling amount according to the end milling amount data of the corner point obtained in the step (4).
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| CN1868668A (en) * | 2006-06-13 | 2006-11-29 | 中铁宝桥股份有限公司 | Machining alignment and location method of cable tower segment |
| CN1869586A (en) * | 2006-06-13 | 2006-11-29 | 中铁宝桥股份有限公司 | Method of reference counting before cable tower segmental face machining |
| CN102091814A (en) * | 2010-12-17 | 2011-06-15 | 二重集团（德阳）重型装备股份有限公司 | Method for realizing accurate processing of curved surface by combining laser tracking technology with CAD (computer-aided design)/CAM (computer-aided manufacturing) technology |
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Effective date of registration: 20221125 Address after: 312000 east of Yuedong Road, Yuecheng District, Shaoxing City, Zhejiang Province (Mahai Industrial Park) Patentee after: Zhejiang Jinggong Heavy Steel Structure Co.,Ltd. Address before: 312030 Jianhu Road, Keqiao Economic Development Zone, Keqiao District, Shaoxing City, Zhejiang Province Patentee before: ZHEJIANG JINGGONG STEEL BUILDING GROUP Co.,Ltd. |