Automatic chamfering machining method and system for unthreaded hole and threaded bottom hole of large diesel engine part

Abstract

The invention discloses an automatic chamfering machining method and system for an unthreaded hole and a threaded bottom hole of a large diesel engine part, and relates to the technical field of diesel engine machining. The method comprises the steps that the chamfering machining depth is calculated according to the geometrical relationship of the bottom hole diameter, the chamfering angle and the orifice chamfering maximum diameter; based on the chamfering depths of the holes of different specifications, a value range filtering data interval is constructed; establishing a geometrical relationship between the chamfering tool and the orifice chamfer to obtain chamfering reference plane data and a final drilling depth value; and machining the chamfer according to the chamfer reference plane data and the final drilling depth value. Automatic machining of unthreaded hole and threaded hole chamfering can be achieved, and the machining precision and efficiency are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of diesel engine processing, in particular to a method and system for automatically chamfering a light hole and a threaded bottom hole of a large diesel engine part. Background Art

[0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] Diesel engines are the core power source for ship propulsion, power generation equipment, and heavy machinery. The machining accuracy of their key structural parts, such as the engine base, frame, and cylinder block, directly affects the performance and reliability of the entire engine. These parts have the following significant characteristics: (1) High structural complexity: Taking the engine base of a low-speed marine diesel engine as an example, its length can reach more than 15 meters, integrating dozens of key functional surfaces such as the main bearing hole, crankshaft mounting surface, and oil pan mating surface, and the stiffness of each part varies significantly; (2) Dense hole system and diverse specifications: Cylinder parts usually contain 200 to 500 hole systems of different diameters, with a hole diameter range of Φ10mm to Φ400mm, involving various types such as threaded holes, cooling water holes, lubricating oil holes, and bolt connection holes; (3) Strict geometric tolerances: The coaxiality of the main bearing hole is required to be ≤0.05mm / m, the flatness of the mating surface must be controlled within 0.03mm, and the chamfer dimensional accuracy directly affects the sealing performance and assembly quality.

[0004] Currently, the conventional method for chamfering is to calculate the chamfer depth through tool setting and then complete the chamfering process using a drilling cycle. This method requires independent measurement and coordinate calculation for each hole system, resulting in low chamfering efficiency. Furthermore, it requires the use of multiple tool setting instruments, making it difficult to adapt to processing multiple hole systems. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a method and system for automatically chamfering the smooth holes and threaded bottom holes of large diesel engine parts, which can realize the automated processing of smooth holes and threaded hole chamfers and improve the processing accuracy and efficiency.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions: In a first aspect, an embodiment of the present invention provides a method for automatically chamfering a light hole and a threaded bottom hole of a large diesel engine component, comprising: The chamfering depth is calculated using the geometric relationship between the bottom hole diameter, chamfer angle and the maximum diameter of the hole chamfer. Based on the chamfer depth of holes of different specifications, a value range is constructed to filter the data interval; Establish the geometric relationship between the chamfering tool and the hole chamfer, and obtain the chamfering reference plane data and the final drilling depth value; The chamfer is processed according to the chamfer reference plane data and the final drilling depth value.

[0007] As a further implementation, the chamfering depth is: ; Among them, A represents the chamfer angle, D represents the tool diameter, d represents the inner diameter of the hole, and C represents the chamfer depth.

[0008] As a further implementation method, the hole chamfer size standard is used to set the chamfer size of holes of different specifications, and a value range is established to filter the data interval.

[0009] As a further implementation, a larger hole diameter corresponds to a larger chamfer size.

[0010] As a further implementation method, the data interval is filtered according to the value range, and the chamfering processing path is formulated by satisfying the extraction condition of the chamfering depth value set by the processing aperture.

[0011] As a further implementation method, before establishing the geometric relationship between the chamfering tool and the hole chamfer, the tool compensation value is obtained in advance.

[0012] As a further implementation method, the chamfering reference plane data and the final drilling depth value are obtained according to the tool compensation value, the geometric relationship between the chamfering tool and the hole chamfer.

[0013] In a second aspect, an embodiment of the present invention further provides an automatic chamfering system for processing light holes and threaded bottom holes of large diesel engine parts, comprising: The chamfering depth calculation module is configured to calculate the chamfering depth using the geometric relationship between the bottom hole diameter, the chamfer angle and the maximum diameter of the hole chamfer; The filter data interval construction module is configured to: construct a value range filter data interval based on the chamfer depths of holes of different specifications; The processing parameter acquisition module is configured to: set the tool compensation value, establish the geometric relationship between the chamfering tool and the hole chamfer, and obtain the chamfer reference plane data and the final drilling depth value; The chamfering processing module is configured to process the chamfer according to the chamfering reference plane data and the final drilling depth value.

[0014] In a third aspect, an embodiment of the present invention further provides an electronic device comprising a memory and a processor, and computer instructions stored in the memory and running on the processor. When the computer instructions are run by the processor, the steps in the method for automatically chamfering the light holes and threaded bottom holes of large diesel engine parts are completed.

[0015] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium for storing computer instructions, which, when executed by a processor, completes the steps in the method for automatically chamfering light holes and threaded bottom holes of large diesel engine parts.

[0016] The beneficial effects of the present invention are as follows: (1) The present invention utilizes the geometric relationship among the bottom hole diameter, the chamfer angle and the maximum diameter of the hole chamfer, and uses trigonometric functions to calculate and determine the chamfer depth. The value range is established through the chamfer depth of holes of different specifications to filter the data interval, thereby meeting the extraction conditions of the hole chamfer depth value used in the processing of large diesel engine parts, achieving the automatic extraction of the corresponding chamfer depth according to the hole diameter, and being applicable to the chamfering cutter used, thereby improving the processing efficiency and precision.

[0017] (2) The present invention establishes a spatial geometric model of the chamfering tool and the hole opening, calculates the reference plane coordinates and the final drilling depth value in real time, and forms a geometric constraint closed-loop control; by obtaining the tool length compensation value and radius compensation value in advance and combining it with the force feedback data during the machining process, the cutting parameters can be automatically corrected. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0019] Figure 1 is a diagram showing the geometric relationship between a chamfering tool and a hole chamfer according to one or more embodiments of the present invention; Figure 2 is a flow chart of the present invention according to one or more embodiments. DETAILED DESCRIPTION

[0020] It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those skilled in the art to which the present invention belongs.

[0021] Example 1: Because chamfering holes in machine bases, frames, and cylinder blocks requires numerous steps, and because the hole diameters vary, chamfer dimensions also vary. Conventional processing methods for chamfering holes involve calculating the chamfer depth through tool setting and then completing the chamfering process using a drilling cycle. This chamfering process involves numerous tool setting steps, which wastes time and carries the risk of errors in tool setting and tool length input, impacting machining efficiency.

[0022] Based on this, this embodiment provides a method for automatically chamfering light holes and threaded bottom holes in large diesel engine parts, including: The chamfering depth is calculated using the geometric relationship between the bottom hole diameter, chamfer angle and the maximum diameter of the hole chamfer. Based on the chamfer depth of holes of different specifications, a value range is constructed to filter the data interval; Establish the geometric relationship between the chamfering tool and the hole chamfer, and obtain the chamfering reference plane data and the final drilling depth value; The chamfer is processed according to the chamfer reference plane data and the final drilling depth value.

[0023] Specifically, firstly, the geometric relationship between the bottom hole diameter, chamfer angle and the maximum diameter of the hole chamfer is used to determine the chamfering depth using trigonometric functions, and then the depth of the chamfering is determined by combining the Figure 1 As shown, A represents the chamfer angle, D represents the tool diameter, d represents the inner diameter of the hole, and C represents the chamfer depth. Therefore, the chamfering processing depth (the movement value of the Z axis of the equipment) is expressed as: .

[0024] Among them, the tool diameter is calibrated as the maximum diameter position of the tool, which can be measured by a tool setting probe.

[0025] This embodiment uses trigonometric functions to accurately calculate the chamfering depth, forming a geometric analytical model of bottom hole diameter-chamfer angle-maximum diameter of hole chamfer. The chamfering depth C can be directly calculated in real time from the hole diameter d, tool diameter D and chamfer angle A, without the need for manual measurement of the tool clamping length. like Figure 2 As shown in the figure, the chamfer bottom hole diameter required for the processing of large diesel engine parts is obtained according to the chamfer angle. In actual production, there are holes of different specifications on large diesel engine parts that need to be chamfered. The chamfer angle of each hole may be different, and the corresponding bottom hole diameter will also be different. Through precise measurement and calculation, the chamfer bottom hole diameter of each hole can be determined; the value range is established by the chamfer depth of holes of different specifications to filter the data interval; the data interval is filtered according to the value range, and the chamfer processing path is formulated by satisfying the extraction condition of the chamfer depth value set for the processing hole diameter.

[0026] It should be noted that the chamfer diameter requirements for smooth holes and threaded holes are different.

[0027] This embodiment takes light hole processing as an example. According to the standard for the chamfer size of light hole openings, the chamfer sizes of holes of different specifications are set using the standard values. According to GB / T 6403.4-2008, a value range is established to filter the data interval. As shown in Table 1, the larger the hole diameter, the larger the corresponding chamfer size.

[0028] Table 1 Value range filtering data interval

[0029] Furthermore, conditional data is used to establish a value range to filter the data interval, meeting the extraction conditions for the chamfer depth value used in the machining of large diesel engine parts. This embodiment automatically selects hole systems that meet the machining conditions and generates the optimal path by establishing an association rule between chamfer size and hole diameter.

[0030] The tool compensation value is obtained and then combined with the geometric relationship between the chamfering tool and the hole chamfer to determine the chamfer reference plane data and final drill depth value. The tool compensation value can be measured in real time by an on-machine tool setter or laser probe, allowing the chamfer reference plane and final drill depth values ​​to be dynamically adjusted as the tool wears.

[0031] During chamfering, tools wear out during actual use, and there may be certain errors in the tool's installation position. Failure to perform tool compensation will result in deviations in the processed dimensions, affecting the quality of the part. There are two methods for obtaining tool compensation values: manual measurement, which uses professional measuring tools such as micrometers and calipers to measure the actual radius and length of the tool. Automatic measurement utilizes the CNC machine's built-in tool measurement system, such as a tool presetter or online measuring device.

[0032] This embodiment uses trigonometric calculations to determine the chamfer depth based on the geometric relationship between the bottom hole diameter, chamfer angle, and the maximum diameter of the hole chamfer. By setting the chamfer dimensions for holes of different specifications, a chamfer condition filter program and a value range filter data interval are established to meet the extraction conditions for hole chamfer depth values ​​used in large diesel engine machining. This achieves the automatic extraction of the corresponding chamfer depth based on the hole diameter, while also being compatible with the chamfering tool being used. Therefore, this embodiment enables automated chamfering, improves machining efficiency, avoids time wasted due to repeated tool setting, and enhances machining accuracy.

[0033] Example 2: This embodiment provides an automatic chamfering system for processing light holes and threaded bottom holes in large diesel engine parts, comprising: The chamfering depth calculation module is configured to calculate the chamfering depth using the geometric relationship between the bottom hole diameter, the chamfer angle and the maximum diameter of the hole chamfer; The filter data interval construction module is configured to: construct a value range filter data interval based on the chamfer depths of holes of different specifications; The processing parameter acquisition module is configured to: set the tool compensation value, establish the geometric relationship between the chamfering tool and the hole chamfer, and obtain the chamfer reference plane data and the final drilling depth value; The chamfering processing module is configured to process the chamfer according to the chamfering reference plane data and the final drilling depth value.

[0034] Example 3: This embodiment provides an electronic device, including a memory and a processor, and computer instructions stored in the memory and running on the processor. When the computer instructions are run by the processor, the steps of the method for automatically chamfering the light holes and threaded bottom holes of large diesel engine parts described in Example 1 are completed.

[0035] Example 4: This embodiment provides a computer-readable storage medium for storing computer instructions. When the computer instructions are executed by a processor, the steps of the method for automatically chamfering light holes and threaded bottom holes of large diesel engine parts described in Example 1 are completed.

[0036] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A method for automatically chamfering light holes and threaded bottom holes of large diesel engine parts, characterized in that: include: The chamfering depth is calculated using the geometric relationship between the bottom hole diameter, chamfer angle and the maximum diameter of the hole chamfer. Based on the chamfer depth of holes of different specifications, a value range is constructed to filter the data interval; Establish the geometric relationship between the chamfering tool and the hole chamfer, and obtain the chamfering reference plane data and the final drilling depth value; The chamfer is processed according to the chamfer reference plane data and the final drilling depth value.

2. The method for automatically chamfering the light holes and threaded bottom holes of large diesel engine parts according to claim 1 is characterized in that: The chamfering depth is: ； Among them, A represents the chamfer angle, D represents the tool diameter, d represents the inner diameter of the hole, and C represents the chamfer depth.

3. The method for automatically chamfering the light holes and threaded bottom holes of large diesel engine parts according to claim 1 is characterized in that: Use hole chamfer size standards to set the chamfer sizes of holes of different specifications, and establish a value range to filter the data interval.

4. The method for automatically chamfering the light holes and threaded bottom holes of large diesel engine parts according to claim 3 is characterized in that: The larger the hole diameter, the larger the chamfer size.

5. The method for automatically chamfering the light holes and threaded bottom holes of large diesel engine parts according to claim 3 is characterized in that: The data interval is filtered according to the value range, and the chamfering processing path is formulated by satisfying the extraction conditions of the chamfering depth value set by the processing aperture.

6. The method for automatically chamfering the light holes and threaded bottom holes of large diesel engine parts according to claim 1 is characterized in that: Before establishing the geometric relationship between the chamfering tool and the hole chamfer, obtain the tool compensation value in advance.

7. The method for automatically chamfering the light holes and threaded bottom holes of large diesel engine parts according to claim 6, characterized in that: The chamfering reference plane data and the final drilling depth value are obtained according to the tool compensation value, the geometric relationship between the chamfering tool and the hole chamfer.

8. An automatic chamfering system for light holes and threaded bottom holes of large diesel engine parts, characterized in that: include: The chamfering depth calculation module is configured to calculate the chamfering depth using the geometric relationship between the bottom hole diameter, the chamfer angle and the maximum diameter of the hole chamfer; The filter data interval construction module is configured to: construct a value range filter data interval based on the chamfer depths of holes of different specifications; The processing parameter acquisition module is configured to: set the tool compensation value, establish the geometric relationship between the chamfering tool and the hole chamfer, and obtain the chamfer reference plane data and the final drilling depth value; The chamfering processing module is configured to process the chamfer according to the chamfering reference plane data and the final drilling depth value.

9. An electronic device, characterized in that: The invention comprises a memory and a processor and computer instructions stored in the memory and executed on the processor. When the computer instructions are executed by the processor, the steps of the automatic chamfering method for processing light holes and threaded bottom holes of large diesel engine parts as described in any one of claims 1 to 7 are completed.

10. A computer-readable storage medium, characterized in that Used to store computer instructions, which, when executed by a processor, complete the steps of the method for automatically chamfering light holes and threaded bottom holes of large diesel engine parts as described in any one of claims 1 to 7.

Images