A quick processing method of high-strength shafting for ship

Abstract

The application relates to a quick machining method of a high-strength shaft system of a ship, which comprises the following steps: S1, center marks are drawn on the two side end faces of each shaft section of the shaft system, and each shaft section of the shaft system is sequentially arranged and fixed according to the center marks, so that the center marks on the end faces of the shaft sections are on the same straight line; S2, an automatic measuring system is used to scan the machined surfaces of the arranged and fixed shaft sections, the machined surface scanning data is transmitted to a control system for data processing, the straight line where the center marks on the end faces of the shaft sections are located is taken as a shaft system center axis, and machining allowance data of the machined surfaces of the shaft sections is obtained by taking the shaft system center axis as a reference; and S3, the control system transmits the machining allowance data of the machined surfaces of the shaft sections to a numerical control machine tool, and the numerical control machine tool sequentially machines the machined surfaces of the shaft sections of the shaft system; the quick machining method improves the machining precision of the shaft system and avoids the phenomenon that the center lines of the shaft sections do not match the theoretical center line of the shaft system.

Description

Technical Field

[0001] This invention relates to the field of shaft machining technology, and in particular to a rapid machining method for high-strength marine shaft systems. Background Technology

[0002] A ship's shafting system is an assembly of multiple shaft segments located between the main engine output and the propeller. These segments are connected end-to-end by flanges and supported by spaced-apart bearing housings on structural members at the bottom of the engine room. In shipbuilding, the machining accuracy of the shafting system is crucial, as its quality directly affects the intensity of vibration and noise generated during ship navigation, the effective output of the main engine, and the temperature rise of the shafting bearings. Currently, the typical manufacturing process for ship shafting involves machining each shaft segment individually first, and then assembling the finished segments. This method is prone to misalignment between the centerlines of individual shaft segments and the theoretical centerline of the shafting system, leading to rework or re-engineering. Furthermore, the constant adjustments required during assembly are laborious and inefficient.

[0003] Therefore, this invention proposes a rapid machining method for high-strength marine shafting to solve the above problems. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a rapid machining method for high-strength marine shafting, thereby improving the machining accuracy of the shafting and effectively avoiding the phenomenon that the center lines of each shaft segment do not match the theoretical center line of the shafting.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is: a rapid machining method for high-strength marine shafting, the innovation of which is: including the following steps: S1. Mark the center on both ends of each shaft segment in the shaft system. According to the center marks, arrange and fix each shaft segment in the shaft system in sequence so that the center marks on the ends of each shaft segment are on the same straight line. S2. The automatic measurement system scans the surfaces to be machined on each shaft segment of the fixed shaft system. The scanned data of the surfaces to be machined is transmitted to the control system for data processing. The straight line where the center mark of the end face of each shaft segment is located is taken as the central axis of the shaft system. Based on the central axis of the shaft system, the machining allowance data of the surface to be machined on each shaft segment is calculated. S3. The control system transmits the machining allowance data of the shaft segment to be machined to the CNC machine tool, and the CNC machine tool performs machining on the machined surfaces of each shaft segment in sequence.

[0006] Furthermore, the detailed process of the CNC machine tool sequentially machining the surfaces to be machined on each shaft segment of the shaft system is as follows: The CNC machine tool machines the shaft segment according to the machining allowance data of the surface to be machined on the shaft segment to be machined. After the shaft segment is machined, it returns to the assembly point and is assembled and fixed together with the shaft segment to be machined. The center marks on both end faces are used for calibration to ensure that the center marks of the machined shaft segment and the center marks of the shaft segment to be machined are on the same straight line. The automatic measurement system scans the machined surface of the shaft segment and transmits the machined surface scan data to the control system. The control system calculates the position of the center axis of the machined shaft segment according to the machined surface scan data and uses it as the new shaft system center axis. Using the new shaft system center axis as a reference, the machining allowance data of the shaft segment to be machined is corrected, and the corrected machining allowance data of the shaft segment to be machined is transmitted to the CNC machine tool. The CNC machine tool machines the surface to be machined on the next shaft segment according to the corrected machining allowance data of the shaft segment to be machined. The above process is repeated until all shaft segments are machined.

[0007] Furthermore, the automatic measurement system includes a laser scanner and a camera. The laser scanner emits a laser beam onto the surface of the shaft segment, and the camera captures the deformed laser beam, thereby quickly acquiring three-dimensional data through triangulation.

[0008] Furthermore, the CNC machine tool is equipped with a contact-type side head for real-time dimensional measurement during machining.

[0009] The advantages of this invention are: The rapid machining method of this invention first uses arrangement and scanning to take the line connecting the center marks of the end faces of each shaft segment as the central axis of the entire shaft system, and uses this as a reference for machining. This not only ensures that the machined surfaces of all shaft segments rotate around the same actual axis, greatly improving the coaxiality of key parts, thus ensuring that the shaft system has low vibration and low noise during operation, but also allows the CNC machine tool to perform continuous machining according to unified data, saving the time of repeated and precise alignment and tool setting for each shaft segment. It is particularly suitable for the mass production of multi-step, long shaft systems.

[0010] The rapid machining method of the present invention puts the machined shaft segment back into the reassembled arrangement, scans its actual machined surface, calculates its actual center axis, and uses this as a new reference to correct the machining data of the next shaft segment. This new reference includes the machining error information of the previous process. The machining error is identified and compensated segment by segment, thereby reducing the risk of error accumulation caused by the individual machining of each shaft segment of the shaft system. Detailed Implementation

[0011] To further illustrate the technical means and effects of the present invention in achieving the intended purpose, the following detailed description of the specific implementation methods, structures, features and effects of the present invention, in conjunction with preferred embodiments, is provided below.

[0012] Example This embodiment provides a rapid machining method for high-strength marine shafting, including the following steps: S1. Mark the center on both ends of each shaft segment in the shaft system. According to the center marks, arrange and fix each shaft segment in the shaft system in sequence so that the center marks on the ends of each shaft segment are on the same straight line. S2. The machined surfaces of each shaft segment in the fixed shaft system are scanned using an automatic measurement system, which includes a laser scanner and a camera. The laser scanner emits a laser beam onto the surface of the shaft segment, and the camera captures the deformed laser line. Three-dimensional data is quickly obtained through triangulation. The scanned data of the machined surfaces is transmitted to the control system for data processing. The straight line where the center mark of the end face of each shaft segment is located is taken as the central axis of the shaft system. Based on the central axis of the shaft system, the machining allowance data of the machined surfaces of each shaft segment is calculated. S3. The control system transmits the machining allowance data of the shaft segment to be machined to the CNC machine tool. The CNC machine tool performs machining on the machined surfaces of each shaft segment in sequence. The CNC machine tool spindle is equipped with a contact head to perform real-time dimension measurement during the machining process.

[0013] The detailed process is as follows: The CNC machine tool performs machining on the shaft segment according to the machining allowance data of the surface to be machined. After the shaft segment is machined, it returns to the assembly point and is fixed together with the shaft segment to be machined. The center marks on both end faces are used for calibration to ensure that the center mark of the machined shaft segment is on the same straight line as the center mark of the shaft segment to be machined. The automatic measurement system scans the machined surface of the shaft segment and transmits the scanned data to the control system. The control system calculates the position of the center axis of the machined shaft segment based on the scanned data and uses it as the new axis of the shaft system. Using the new axis of the shaft system as a reference, the machining allowance data of the shaft segment to be machined is corrected to eliminate the accumulation of errors during the machining process. The corrected machining allowance data of the shaft segment to be machined is transmitted to the CNC machine tool. The CNC machine tool performs machining on the surface to be machined of the next shaft segment according to the corrected machining allowance data. The above process is repeated until all shaft segments are machined.

[0014] The rapid machining method for high-strength marine shafting first involves assembling and scanning, using the line connecting the center marks of the end faces of each shaft segment as the central axis of the entire shafting system. Machining is then performed based on this axis, ensuring that the machined surfaces of all shaft segments rotate around the same actual axis, greatly improving the coaxiality of key components. This results in low vibration and low noise during shafting operation. Furthermore, the CNC machine tool performs continuous machining according to unified data, eliminating the need for repeated and precise alignment and tool setting for each shaft segment. This method is particularly suitable for the mass production of multi-step, long shafting systems.

[0015] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A rapid machining method for high-strength marine shafting, characterized in that: Includes the following steps: S1. Mark the center on both ends of each shaft segment in the shaft system. According to the center marks, arrange and fix each shaft segment in the shaft system in sequence so that the center marks on the ends of each shaft segment are on the same straight line. S2. The automatic measurement system scans the surfaces to be machined on each shaft segment of the fixed shaft system. The scanned data of the surfaces to be machined is transmitted to the control system for data processing. The straight line where the center mark of the end face of each shaft segment is located is taken as the central axis of the shaft system. Based on the central axis of the shaft system, the machining allowance data of the surface to be machined on each shaft segment is calculated. S3. The control system transmits the machining allowance data of the machined surface of the shaft segment to be machined to the CNC machine tool, and the CNC machine tool performs machining on the machined surfaces of each shaft segment in sequence. The detailed process of the CNC machine tool sequentially machining the surfaces of each shaft segment in the shaft system is as follows: The CNC machine tool machines the shaft segment according to the machining allowance data of the surface to be machined. After machining, the shaft segment returns to the assembly point and is fixed together with the shaft segment to be machined. The center marks on both end faces are used for calibration, ensuring that the center marks of the machined shaft segment and the shaft segment to be machined are aligned. The automatic measurement system scans the machined surface of the completed shaft segment and transmits the scanned data to the control system. The control system calculates the position of the center axis of the machined shaft segment based on the scanned data and uses it as the new shaft system center axis. Using this new center axis as a reference, the machining allowance data of the shaft segment to be machined is corrected, and the corrected machining allowance data is transmitted to the CNC machine tool. The CNC machine tool then machines the surface to be machined of the next shaft segment based on the corrected machining allowance data. This process is repeated until all shaft segments are machined.

2. The rapid machining method for high-strength marine shafting according to claim 1, characterized in that: The automatic measurement system includes a laser scanner and a camera. The laser scanner emits a laser beam onto the surface of the shaft segment, and the camera captures the deformed laser beam. Three-dimensional data is quickly obtained through triangulation.

3. The rapid machining method for high-strength marine shafting according to claim 1, characterized in that: The CNC machine tool is equipped with a contact probe on its spindle for real-time online dimensional measurement during machining.