Method for calibrating spatial position of axis of to-be-opened circular hole on curved surface of large part

Abstract

The invention provides a method for calibrating the spatial position of the axis of a to-be-opened circular hole on a curved surface of a large part, which comprises the following steps: S1, marking the circle center of the to-be-opened circular hole on the curved surface, and making two intersecting planes according to the axis of the to-be-opened circular hole, the intersecting line of the two intersecting planes being the axis of the to-be-opened circular hole; s2, the two intersecting planes intersect with the curved surface to form two intersecting curves, the two intersecting curves are both plane curves, and the intersection point of the two intersecting curves is the circle center point of the to-be-opened circular hole; and S3, the two intersecting curves are recognized through a machine tool system, and then the space position parameters of the circle center point of the to-be-opened circular hole and the axis of the circular hole are calibrated in the machine tool system. According to the method, the spatial position parameter calibration of the axis of the to-be-opened circular hole can be realized in a relatively small spatial size range, and the lineation error is reduced. The problem that large errors exist in calibration of the circular hole axis space position on the curved surface of a large part is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of methods for machining circular holes on large-scale part curved surfaces, and in particular relates to a method for calibrating the spatial position of the axis of a circular hole to be opened on the large-scale part curved surface. Background Art

[0002] When using a large metal cutting machine to process circular holes on the curved surface of a large part, it is necessary to adjust the machine according to the actual position of the curved surface so that the axis of the machine spindle coincides with the actual axis of the circular hole to be opened, and then feed along the axial direction of the machine spindle to complete the processing of the circular hole.

[0003] The marking method before the improvement is: draw the center point of the circular hole on the curved surface, and then draw the large part design reference plane (line) near the center point of the circular hole by translation. The large metal cutting machine tool adjusts the spindle axis of the processing machine tool to the set angle according to the drawn center point and the translated reference plane (line) to process the circular hole.

[0004] Problems with the marking method before the improvement: The actual spatial position of the axis of the circular hole cannot be directly determined by drawing the center point of the circular hole. It is necessary to measure the reference plane (line) after translation and indirectly determine the actual spatial position of the axis of the circular hole after conversion. Because the structural dimensions of large parts are very large, which may reach more than ten meters, it is easy to produce large errors when translating the reference plane (line). After conversion, the actual spatial position of the axis of the circular hole will also produce large errors.

[0005] The invention can solve the problem that the original marking method has a large error in marking the spatial position of the circular hole axis on the curved surface of a large part. Summary of the invention

[0006] In order to solve the problems existing in the related art, the present invention provides a method for calibrating the spatial position of the axis of a circular hole to be opened on the curved surface of a large part. When this method calibrates the spatial position of the axis of a circular hole by drawing a line on the curved surface of a large part, the error is small.

[0007] The technical solution adopted by the present invention is:

[0008] A method for calibrating the spatial position of the axis of a circular hole to be opened on the surface of a large part.

[0009] S1. Mark the center of the circular hole to be opened on the curved surface, and make two intersecting planes according to the axis of the circular hole to be opened. The intersection line of the two intersecting planes is the axis of the circular hole to be opened;

[0010] S2. Two intersecting planes intersect with the curved surface to form two intersecting curves. Both intersecting curves are plane curves. The intersection point of the two intersecting curves is the center point of the circular hole to be opened.

[0011] S3. Identify two intersecting curves through the machine tool system, and then calibrate the spatial position parameters of the center point of the circular hole to be opened and the axis of the circular hole in the machine tool system.

[0012] The present invention also provides an instrument for calibrating the spatial position of the axis of a circular hole to be opened on the curved surface of a large part. The axis of the circular hole to be opened is calibrated according to the above method, including a positioning device for positioning the axis of the circular hole on the curved surface at the circular hole to be opened. The positioning device makes two intersecting planes whose intersection line is the axis of the circular hole based on the center of the circle and the axis of the circular hole to be opened, and calibrates two intersecting curves formed by the two intersecting planes and the curved surface. The machine tool system recognizes the two intersecting curves to perform feeding movement.

[0013] The present invention also provides a metal cutting machine tool, comprising a controller and the above-mentioned instrument connected to the controller for calibrating the spatial position of the axis of the circular hole to be opened on the curved surface of a large part.

[0014] The beneficial effect of the present invention is that the method can realize the calibration of the spatial position parameters of the axis of the circular hole to be opened within a relatively small spatial size range, reducing the marking error and solving the problem of large error in calibrating the spatial position of the axis of the circular hole on the curved surface of a large part. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of a method for calibrating the spatial position of the axis of a circular hole to be opened on a large part curved surface according to the present invention.

[0016] In the figure, 1, axis, 2, first intersecting curve, 3, second intersecting curve, 4, second plane, 5, first plane, 6, plane circle, 7, plane circle projection, 8, curved surface. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the embodiments, but the present invention is not limited in any way. Based on the enlightenment of the present invention, the method replacement or deformation made without departing from the scope protected by the claims of the present invention all falls within the protection scope of the present invention. The scope of protection of the present invention shall be subject to the attached claims.

[0018] The present invention relates to a marking method for marking the spatial position of the axis of a hole on a large part curved surface in metal cutting processing, and is suitable for the scenario of machining circular holes on a large part curved surface by lines on a large metal cutting machine tool.

[0019] A method for calibrating the spatial position of the axis of a circular hole to be opened on the surface of a large part.

[0020] S1. Mark the center of the circular hole to be opened on the curved surface 8, and make two intersecting planes according to the axis 1 of the circular hole to be opened. The intersection line of the two intersecting planes is the axis 1 of the circular hole to be opened;

[0021] S2, the two intersecting planes intersect with the curved surface 8 to form two intersecting curves, both of which are plane curves, and the intersection point of the two intersecting curves is the center point of the circular hole to be opened;

[0022] S3. Identify two intersecting curves through the machine tool system, and then calibrate the spatial position parameters of the center point of the circular hole to be opened and the axis 1 of the circular hole in the machine tool system.

[0023] like Figure 1 This method is based on the principle that two planes intersect to form a straight line. The circular hole axis 1 is perpendicular to the plane circle 6; the second plane 4 intersects with the first plane 5, and the intersection line is the circular hole axis 1; the first intersection curve 2 is the intersection line of the first plane 5 and the curved surface 8; the second intersection curve 3 is the intersection line of the second plane 4 and the curved surface 8; the plane circle projection 7 is the projection of the plane circle 6 perpendicular to the circular hole axis along the circular hole axis 1 on the curved surface 8.

[0024] The first intersection curve 2 is on the first plane 5, and the second intersection curve 3 is on the second plane 4. The first intersection curve 2 and the second intersection curve 3 are both plane curves. The first intersection curve 2 and the second intersection curve 3 are drawn on the curved surface 8, and the circular hole axis 1 can be deduced, and the intersection point of the first intersection curve 2 and the second intersection curve 3 is the center point of the circle on the curved surface 8.

[0025] Even simpler, the plane circle can be omitted: two intersecting planes are made whose intersection line is the circular hole axis 1, and two intersecting curves formed by the two intersecting planes and the curved surface 8 are calibrated. The intersection line of the plane where the two intersecting curves are located and the large part curved surface 8 is the circular hole axis 1. Therefore, the machine tool system can obtain the position of the circular hole axis 1 by identifying the two intersecting curves, and thus perform feed motion to complete the processing of the circular hole.

[0026] The present invention also provides an instrument for calibrating the spatial position of the axis of a circular hole to be opened on the curved surface of a large part. The axis of the circular hole to be opened is calibrated according to the above method, including a positioning device for positioning the axis 1 of the circular hole on the curved surface 8 at the circular hole to be opened. The positioning device makes two intersecting planes whose intersection line is the axis 1 of the circular hole according to the center of the circle and the axis 1 of the circular hole to be opened, and calibrates two intersecting curves formed by the two intersecting planes and the curved surface 8. The machine tool system recognizes the two intersecting curves to perform feeding movement.

[0027] The present invention also provides a large-scale metal cutting machine tool, comprising a controller and the above-mentioned instrument connected to the controller for calibrating the spatial position of the axis of the circular hole to be opened on the curved surface of the large-scale part.

Claims

1. A method for calibrating the spatial position of the axis of a circular hole to be opened on a large part surface, characterized in that: S1. Mark the center of the circular hole to be opened on the curved surface, and make two intersecting planes according to the axis of the circular hole to be opened. The intersection line of the two intersecting planes is the axis of the circular hole to be opened; S2. Two intersecting planes intersect with the curved surface to form two intersecting curves. Both intersecting curves are plane curves. The intersection point of the two intersecting curves is the center point of the circular hole to be opened. S3. Identify two intersecting curves through the machine tool system, and then calibrate the spatial position parameters of the center point of the circular hole to be opened and the axis of the circular hole in the machine tool system.

2. An instrument for calibrating the spatial position of the axis of a circular hole to be opened on a large part surface, characterized in that: The method according to claim 1 calibrates the axis of the circular hole to be opened, including a positioning device for positioning the axis of the circular hole on the curved surface at the circular hole to be opened, the positioning device makes two intersecting planes whose intersection line is the axis of the circular hole according to the center of the circle and the axis of the circular hole to be opened, and calibrates two intersecting curves formed by the two intersecting planes and the curved surface, and the machine tool system recognizes the two intersecting curves to perform feeding motion.

3. A metal cutting machine tool, characterized in that: The invention comprises a controller and an instrument for calibrating the spatial position of the axis of a circular hole to be opened on a large part curved surface as claimed in claim 2, which is connected to the controller.

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