Digital design and manufacturing integration method for stepped drill bit

Abstract

The invention discloses a digital design and manufacturing integration method of a stepped drill bit, which comprises the following steps: S1, parameter selection: determining geometric parameters of the stepped drill bit, such as the diameter, length, transition angle and cutting edge angle of each step, and material attributes, such as high-speed steel and hard alloy, according to application scenes of the stepped drill bit, such as machining materials, aperture requirements and machining depth; s2, three-dimensional modeling: constructing a three-dimensional model of the stepped drill bit by using computer aided design software; through digital design, the design of the stepped drill bit can be quickly and accurately optimized, the design precision and efficiency are improved, the design period is shortened, through numerical control programming and real-time quality detection and feedback, the product quality can be effectively guaranteed, machining errors are reduced, a database is established, and data sharing and collaboration are achieved; information circulation and cooperation among departments are promoted, errors and delay caused by unsmooth information are avoided, and the overall operation efficiency and competitiveness of enterprises are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of drill bits, and in particular to a method for integrating digital design and manufacturing of a step drill bit. Background Art

[0002] In the machining industry, step drills are widely used in various machining scenarios with varying hole diameter requirements. However, the traditional design and manufacturing process for step drills often presents numerous challenges. The design phase primarily relies on manual experience to determine geometric parameters, lacking precise digital simulation analysis. This results in long design cycles and difficulty ensuring design rationality.

[0003] During the manufacturing process, information communication between various links is poor, and design changes cannot be effectively and timely transmitted to the manufacturing process, which easily leads to processing errors and makes it difficult to ensure product quality. Furthermore, traditional methods lack effective management and utilization of data from the entire design, manufacturing, and testing process, making it impossible to achieve efficient collaboration between departments, which seriously restricts the company's production efficiency and competitiveness. Therefore, we propose an integrated digital design and manufacturing method for step drill bits to address these issues. Summary of the Invention

[0004] Based on the technical problems existing in the background technology, the present invention proposes an integrated method for digital design and manufacturing of a step drill bit.

[0005] The present invention proposes a method for integrating digital design and manufacturing of a step drill bit, comprising the following steps: S1: Parameter selection: According to the application scenario of the step drill, such as processing materials, hole diameter requirements, processing depth, determine its geometric parameters such as each step diameter, length, transition angle, cutting edge angle and material properties such as high-speed steel and cemented carbide; S2: 3D modeling: Use computer-aided design (CAD) software (such as SolidWorks, CATIA, etc.) to build a 3D model of the step drill. The model must accurately express the geometric characteristics of each step, including the shape of the cutting edge, the structure of the chip groove, the transition radius, etc. S3: Using a parametric design method, key dimensions of the step drill, such as diameter, length, and cutting edge angle, are set as adjustable parameters. This facilitates the rapid generation of step drill models of different specifications, and enables the adjustment and optimization of the step drill models. S4: Finite element analysis and optimization: Import the generated 3D model into finite element analysis software to simulate and analyze the mechanical properties of the step drill bit under different working conditions, simulate the stress conditions of the drill bit during drilling, analyze the stress distribution and deformation, and optimize the drill bit structure by adjusting the design parameters; S5: Virtual assembly and interference checking: In a virtual environment, the designed step drill bit is assembled with the matching drill tool to check for interference between the components. By simulating the assembly process, design flaws can be discovered and modified in a timely manner to ensure the feasibility of the drill bit's assembly in actual use. S6: CNC programming: Import the optimized 3D model into computer-aided manufacturing software to generate CNC machine tool processing programs. When programming, it is necessary to consider the tool path, cutting parameters (such as feed rate, spindle speed, cutting depth, etc.) and the use of coolant; S7: Quality Inspection and Feedback: During the machining process, online inspection equipment is used to conduct real-time inspections of the critical dimensions and form and position tolerances of the step drill. Inspection data is compared with design requirements. If deviations are found, machining parameters are adjusted or tool compensation is performed promptly to ensure that product quality meets design standards. Furthermore, quality inspection data is fed back to the digital design module to provide a basis for subsequent design improvements. S8: Establish a database: Build a database covering the entire process of step drill bit design, manufacturing, and testing. The database stores design parameters, finite element analysis results, CNC machining programs, quality inspection data and other information to facilitate unified data management and query; S9: Data Sharing and Collaboration: Through the enterprise intranet or cloud computing platform, data sharing and collaboration between relevant departments such as design, manufacturing, and quality inspection can be achieved. Personnel from different departments can access the required data in real time to carry out their work, improving work efficiency and reducing errors and delays caused by poor information flow.

[0006] Preferably, the specific steps of the finite element analysis and optimization include S41: meshing the model, reasonably setting the mesh type, size and density according to the structural characteristics of the drill bit and the analysis accuracy requirements, such as using a finer mesh in areas where stress concentration may occur (such as step transitions and near the cutting edge); S42: Setting simulation working conditions, including defining parameters such as drilling material properties, cutting force magnitude and direction, and rotation speed.

[0007] S43: After completing the settings, start the analysis calculation, the software solves the node displacement, and then calculates the stress distribution and deformation based on the above equations.

[0008] Preferably, the analysis results are intuitively presented in the form of cloud maps, charts, etc. If it is found that the stress concentration in a certain part exceeds the allowable value or the deformation is too large, the designer returns to the three-dimensional modeling software, adjusts the structural dimensions of the part, such as increasing the radius of the step transition fillet, changing the edge shape parameters, etc., and re-exports the model to the finite element analysis software for simulation again until the stress distribution and deformation results that meet the strength, stiffness and cutting performance requirements are obtained.

[0009] Preferably, the steps of virtual assembly and interference checking include: S51: Using virtual assembly software, the designed three-dimensional model of the step drill bit and the three-dimensional model of the matching drilling tool are imported into the virtual assembly environment; S52: In a virtual assembly environment, the actual assembly process is simulated. Each component is positioned, aligned, and connected in sequence according to the assembly process requirements to achieve virtual assembly of the step drill bit and drilling tools. During this process, the software uses spatial geometry algorithms to check the positional relationships between components in real time to determine whether there is interference. S53: Once interference is detected, the software immediately issues an alarm and displays the interference area with a clear logo. Designers then return to the 3D modeling software based on the prompts, adjust the structure or size of the interfering part, and perform virtual assembly and interference checking again until the assembly process is successfully completed, ensuring the assembly feasibility of the drill bit in actual use.

[0010] Preferably, the specific steps of quality detection and feedback include: S71: Size and shape inspection Use a three-dimensional coordinate measuring machine or optical measuring equipment (such as a laser scanner) to inspect the size and shape of the processed step drill.

[0011] S72: Inspection contents include the diameter, length, cutting edge angle, transition radius, etc. of each step. Surface quality inspection: Use a surface roughness tester to inspect the surface quality of the step drill to ensure that it meets the design requirements.

[0012] S73: Analyze test data and compare it with the design model to evaluate machining accuracy. For out-of-tolerance parts, analyze the causes and propose improvement measures.

[0013] Preferably, the inspection data is compared with the design model, and the deviation values of various dimensions and geometric tolerances are calculated using statistical process control algorithms. If the deviation value exceeds the allowable range, the quality inspection software system automatically generates adjustment instructions and transmits them to the machine tool control system. The machine tool immediately adjusts the processing parameters, such as tool compensation value and feed speed, to correct the processing process and ensure that the quality of subsequent processed products meets the design standards. At the same time, the quality inspection data is fed back to the digital design module. Designers can analyze the data to identify potential design problems and provide a strong basis for subsequent product design improvements.

[0014] Preferably, a relational database management system is used to construct a database specifically for storing data from the entire process of step drill design, manufacturing, and testing. The database design follows the principle of standardization and is divided into multiple data tables, such as the design parameter table that stores design input parameters such as the diameter, length, and cutting edge angle of each step; the finite element analysis result table that records analysis data such as stress distribution and deformation; the NC machining program table that stores generated NC codes; and the quality inspection data table that stores key dimension inspection values, form and position tolerance inspection values, and deviation analysis results. To ensure the integrity, accuracy, and security of the data, a database user authority management mechanism is set up, and different department personnel are assigned different data access rights according to work needs. For example, designers have read and write permissions for the design parameter table, while manufacturing personnel only have read and execute permissions for the NC machining program table. Quality inspection personnel have read and write permissions for the quality inspection data table to prevent data from being misoperated or illegally tampered with.

[0015] Preferably, a data sharing service platform is established through an internal enterprise network architecture or with the help of a cloud computing platform to enable data sharing and collaboration among relevant departments such as the design department, manufacturing department, and quality inspection department. Personnel from each department log in to the data sharing service platform through dedicated data access client software or a browser on their respective office terminals, and obtain the required data in real time according to their permissions. For example, after logging in to the platform, designers can query the design parameters and finite element analysis results of previous similar step drill design projects to provide reference for the current design; manufacturing personnel can obtain the latest CNC machining programs to guide machine tool processing; quality inspection personnel upload the latest quality inspection data to the platform for designers and manufacturers to review and analyze. Collaborative office software features, such as online document editing and project task management, are used to promote communication and collaboration among departments. Designers write design improvement plans in online documents based on quality inspection feedback data. Manufacturing personnel and quality inspection personnel participate in real-time discussions, providing opinions and suggestions, thus achieving efficient collaboration among departments and improving the overall operational efficiency and competitiveness of the enterprise.

[0016] Beneficial effects of the preparation of the present invention: 1. Through digital design, parametric design and finite element analysis, the design of step drill bits can be optimized quickly and accurately, improving design accuracy and efficiency and shortening the design cycle.

[0017] 2. During the manufacturing process, CNC programming and real-time quality inspection and feedback can effectively ensure product quality, reduce processing errors and improve production efficiency.

[0018] 3. Establishing a database and realizing data sharing and collaboration has promoted information flow and collaboration among departments, avoided errors and delays caused by poor information flow, and improved the overall operational efficiency and competitiveness of the enterprise. DETAILED DESCRIPTION

[0019] The present invention will be further explained below with reference to specific embodiments.

[0020] This embodiment proposes a digital design and manufacturing integrated method for a step drill bit, comprising the following steps: S1: Parameter selection: According to the application scenario of the step drill, such as processing materials, hole diameter requirements, processing depth, etc., determine its geometric parameters, including each step diameter, length, transition angle, cutting edge angle, and material properties, such as high-speed steel, cemented carbide, etc.

[0021] S2: 3D Modeling: Use computer-aided design (CAD) software, such as SolidWorks or CATIA, to construct a 3D model of the step drill. This model must accurately represent the geometric features of each step, including cutting edge shape, chip flute structure, and transition radius.

[0022] S3: Parametric Design: Using parametric design methods, key dimensions of step drills, such as diameter, length, and cutting edge angle, are set as adjustable parameters. This allows for rapid generation of step drill models of varying specifications, and facilitates adjustment and optimization of these models.

[0023] S4: Finite Element Analysis and Optimization S41: Meshing: Mesh the model. Based on the drill bit's structural characteristics and analysis accuracy requirements, appropriately set the mesh type, size, and density. For example, use a finer mesh in areas where stress concentration is likely to occur, such as step transitions and near the cutting edge.

[0024] S42: Setting simulation working conditions: Setting simulation working conditions, including defining parameters such as drilling material properties, cutting force magnitude and direction, and rotation speed.

[0025] S43: Analysis, Calculation, and Optimization: After completing the setup, the analysis and calculation are started. The software solves the node displacement and then calculates the stress distribution and deformation based on the relevant equations. The analysis results are presented intuitively in the form of cloud maps, charts, etc. If the stress concentration in a certain part exceeds the allowable value or the deformation is too large, the designer returns to the 3D modeling software and adjusts the structural dimensions of the part, such as increasing the step transition fillet radius, changing the edge shape parameters, etc., and re-exports the model to the finite element analysis software for simulation again until the stress distribution and deformation results that meet the strength, stiffness, and cutting performance requirements are obtained.

[0026] S5: Virtual Assembly and Interference Detection S51: Model import: Use virtual assembly software to import the designed three-dimensional model of the step drill bit and the three-dimensional model of the matching drilling tools into the virtual assembly environment.

[0027] S52: Virtual Assembly and Inspection: In a virtual assembly environment, the actual assembly process is simulated. Each component is positioned, aligned, and connected according to the assembly process requirements, completing the virtual assembly of the step drill bit and drill tool. During this process, the software uses spatial geometry algorithms to check the positional relationships between components in real time to determine if there is any interference.

[0028] S53: Interference Handling: Once interference is detected, the software immediately issues an alert and displays the interfering area with a prominent logo. Designers follow this prompt and return to the 3D modeling software to adjust the structure or dimensions of the interfering area, performing virtual assembly and interference checking again until the assembly process is successfully completed, ensuring the drill bit's practical feasibility.

[0029] S6: CNC Programming: Import the optimized 3D model into computer-aided manufacturing software to generate the CNC machine program. This programming requires consideration of tool paths, cutting parameters such as feed rate, spindle speed, and depth of cut, as well as the use of coolant.

[0030] S7: Quality Inspection and Feedback S71: Size and shape inspection: Use a three-dimensional coordinate measuring machine or optical measuring equipment such as a laser scanner to inspect the size and shape of the processed step drill.

[0031] S72: Inspection content: The inspection content includes the diameter, length, cutting edge angle, transition radius, etc. of each step. At the same time, a surface roughness tester is used to test the surface quality of the step drill to ensure that it meets the design requirements.

[0032] S73: Inspection Data Analysis and Processing: This process compares inspection data with the design model, applying statistical process control algorithms to calculate deviations for various dimensions and form and position tolerances. If deviations exceed the allowable range, the quality inspection software automatically generates adjustment instructions and transmits them to the machine tool control system. The machine tool immediately adjusts machining parameters, such as tool compensation and feed rate, to correct the machining process and ensure that subsequent product quality meets design standards. Furthermore, quality inspection data is fed back to the digital design module, where designers analyze the data to identify potential design issues and provide a solid foundation for subsequent product design improvements.

[0033] S8: Establish a Database: Using a relational database management system, a database was constructed specifically to store data from the entire process of step drill design, manufacturing, and testing. The database design adhered to the principle of standardization and was divided into multiple data tables. For example, the design parameter table stored design input parameters such as the diameter, length, and cutting edge angle of each step; the finite element analysis results table recorded analysis data such as stress distribution and deformation; the NC machining program table stored the generated NC code; and the quality inspection data table stored key dimension inspection values, geometric tolerance inspection values, and deviation analysis results. To ensure data integrity, accuracy, and security, a database user rights management mechanism was established, assigning different data access rights to personnel in different departments based on their work needs. For example, designers had read and write access to the design parameter table, while manufacturing personnel only had read and execute access to the NC machining program table. Quality inspection personnel had read and write access to the quality inspection data table, preventing data from being misused or illegally tampered with.

[0034] S9: Data Sharing and Collaboration: A data sharing service platform, established through the enterprise's internal network architecture or leveraging a cloud computing platform, enables data sharing and collaboration among relevant departments, such as design, manufacturing, and quality inspection. Staff from each department log in to the data sharing service platform using dedicated data access client software or a browser on their respective office terminals, obtaining the required data in real time according to their permissions. For example, after logging in to the platform, designers can query design parameters and finite element analysis results from previous similar step drill bit design projects to inform their current designs. Manufacturing staff can access the latest CNC machining programs to guide machine tool processing. Quality inspectors can upload the latest quality inspection data to the platform for review and analysis by both designers and manufacturing staff. Collaborative office software features, such as online document editing and project task management, facilitate communication and collaboration among departments. Designers, based on quality inspection feedback, create design improvement plans in online documents. Manufacturing and quality inspection staff can participate in real-time discussions, offering feedback and suggestions. This enables efficient collaboration among departments and improves overall operational efficiency and competitiveness.

[0035] This method uses parametric design to set key dimensions as adjustable parameters. It can quickly generate step drill models of different specifications according to the needs of different application scenarios, greatly improving design efficiency. For example, when faced with requirements for a variety of apertures and processing materials, there is no need to redo the basic design, and a new model can be obtained by simply adjusting the parameters. At the same time, the mechanical properties of the model under different working conditions are simulated using finite element analysis software, which can accurately analyze stress distribution and deformation, allowing designers to discover potential problems in advance and avoid repeated modifications in subsequent production due to unreasonable design, thereby ensuring the accuracy and rationality of the design. When the finite element analysis finds a problem, the designer can easily return to the 3D modeling software to adjust the structural dimensions and then simulate again until the strength, stiffness and cutting performance requirements are met. This iterative optimization process can continuously improve the design of the step drill bit to optimize its performance, providing a good foundation for subsequent manufacturing and use.

[0036] Precise programming: the optimized 3D model is directly imported into the computer-aided manufacturing software to generate the CNC machine tool processing program. During programming, factors such as tool path, cutting parameters and coolant usage are fully considered to ensure the accuracy of the processing instructions, so that the machine tool can accurately process the step drill according to the design requirements, improving the manufacturing accuracy and consistency. The virtual assembly and interference check steps simulate the assembly process before actual manufacturing, and timely discover and solve the interference problems between components, avoiding the assembly difficulties or impossible assembly due to design defects, ensuring the consistency of the manufacturing process, reducing rework and delays in the manufacturing process, and reducing production costs and time costs.

[0037] Comprehensive testing utilizes a variety of specialized testing equipment, including three-dimensional coordinate measuring machines, optical measuring equipment, and surface roughness meters, to comprehensively inspect the size, shape, and surface quality of step drills. This testing covers key elements such as the step diameter, length, cutting edge angle, and transition radius. This allows for comprehensive control of product quality, comparing test data with the design model and calculating deviations using statistical process control algorithms. Once the allowable range is exceeded, the quality inspection software system automatically generates adjustment instructions and transmits them to the machine tool control system, adjusting processing parameters in real time and correcting the processing process to ensure that subsequent product quality meets design standards. At the same time, quality inspection data is fed back to the digital design module to provide data support for design improvements, forming a closed loop of quality control and continuously improving product quality.

[0038] Data Integration: Build a database covering data from the entire design, manufacturing, and testing process, dividing it into multiple tables based on standardized principles. This allows for unified storage and management of all types of data, facilitating data query and traceability. Design parameters, finite element analysis results, CNC machining programs, quality inspection data, and more are all stored in the database in an organized manner, accumulating valuable data assets for the company. A database user rights management mechanism assigns data access permissions tailored to the work needs of different departments. This ensures data security, preventing misuse or unauthorized tampering, while also enabling access to required data across all departments, ensuring smooth work. Data sharing and collaboration are enabled through the company's intranet or cloud computing platform, allowing all departments to access required data in real time, breaking down information barriers. For example, designers can reference previous project data for design, manufacturers can access the latest machining programs, and quality inspectors can upload data for analysis by other departments. Furthermore, collaborative office software facilitates communication and collaboration, enabling efficient collaboration across departments, reducing errors and delays caused by information disparity, and improving overall operational efficiency and competitiveness.

[0039] The comparison and advantages of this method and traditional processing methods are shown in the following table:

[0040] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A digital design and manufacturing integrated method for a step drill bit, characterized in that: The following steps are involved: S1: Parameter selection: According to the application scenario of the step drill, such as processing materials, hole diameter requirements, processing depth, determine its geometric parameters such as each step diameter, length, transition angle, cutting edge angle and material properties such as high-speed steel and cemented carbide; S2: 3D modeling: Use computer-aided design software to construct a 3D model of the step drill. The model must accurately express the geometric characteristics of each step, including the cutting edge shape, chip groove structure, transition radius, etc. S3: Using a parametric design method, key dimensions of the step drill, such as diameter, length, and cutting edge angle, are set as adjustable parameters. This facilitates the rapid generation of step drill models of different specifications, and enables the adjustment and optimization of the step drill models. S4: Finite element analysis and optimization: Import the generated 3D model into finite element analysis software to simulate and analyze the mechanical properties of the step drill bit under different working conditions, simulate the stress conditions of the drill bit during drilling, analyze the stress distribution and deformation, and optimize the drill bit structure by adjusting the design parameters; S5: Virtual assembly and interference checking: In a virtual environment, the designed step drill bit is assembled with the matching drill tool to check for interference between the components. By simulating the assembly process, design flaws can be discovered and modified in a timely manner to ensure the feasibility of the drill bit's assembly in actual use. S6: CNC programming: Import the optimized 3D model into computer-aided manufacturing software to generate CNC machine tool processing programs. When programming, the tool path, cutting parameters and the use of coolant should be considered; S7: Quality Inspection and Feedback: During the machining process, online inspection equipment is used to conduct real-time inspections of the critical dimensions and form and position tolerances of the step drill. Inspection data is compared with design requirements. If deviations are found, machining parameters are adjusted or tool compensation is performed promptly to ensure that product quality meets design standards. Furthermore, quality inspection data is fed back to the digital design module to provide a basis for subsequent design improvements. S8: Establish a database: Build a database covering the entire process of step drill bit design, manufacturing, and testing. The database stores design parameters, finite element analysis results, CNC machining programs, quality inspection data and other information to facilitate unified data management and query; S9: Data Sharing and Collaboration: Through the enterprise intranet or cloud computing platform, data sharing and collaboration between relevant departments such as design, manufacturing, and quality inspection can be achieved. Personnel from different departments can access the required data in real time to carry out their work, improving work efficiency and reducing errors and delays caused by poor information flow.

2. The integrated digital design and manufacturing method for a step drill according to claim 1, characterized in that: The specific steps of the finite element analysis and optimization include: S41: Mesh the model and reasonably set the mesh type, size, and density based on the drill bit structural characteristics and analysis accuracy requirements. For example, use a finer mesh in areas where stress concentration may occur. S42: Setting simulation working conditions, including defining parameters such as drilling material properties, cutting force magnitude and direction, and rotation speed; S43: After completing the settings, start the analysis calculation, the software solves the node displacement, and then calculates the stress distribution and deformation based on the above equations.

3. The integrated digital design and manufacturing method for a step drill according to claim 2, characterized in that: The analysis results are presented intuitively in the form of cloud maps, charts, etc. If it is found that the stress concentration in a certain part exceeds the allowable value or the deformation is too large, the designer returns to the 3D modeling software and adjusts the structural dimensions of the part, such as increasing the radius of the step transition fillet, changing the edge shape parameters, etc., and re-exports the model to the finite element analysis software for simulation again until the stress distribution and deformation results that meet the strength, stiffness and cutting performance requirements are obtained.

4. The integrated digital design and manufacturing method for a step drill according to claim 1, characterized in that: The steps of virtual assembly and interference checking include: S51: Using virtual assembly software, the designed three-dimensional model of the step drill bit and the three-dimensional model of the matching drilling tool are imported into the virtual assembly environment; S52: In a virtual assembly environment, the actual assembly process is simulated. Each component is positioned, aligned, and connected in sequence according to the assembly process requirements to achieve virtual assembly of the step drill bit and drilling tools. During this process, the software uses spatial geometry algorithms to check the positional relationships between components in real time to determine whether there is interference. S53: Once interference is detected, the software immediately issues an alarm and displays the interference area with a clear logo. Designers then return to the 3D modeling software based on the prompts, adjust the structure or size of the interfering part, and perform virtual assembly and interference checking again until the assembly process is successfully completed, ensuring the assembly feasibility of the drill bit in actual use.

5. The integrated digital design and manufacturing method for a step drill according to claim 1, characterized in that: The specific steps of quality detection and feedback include: S71: Dimension and shape inspection: Dimension and shape inspection of the processed step drill is performed using a three-dimensional coordinate measuring machine or an optical measuring device; S72: Inspection contents include the diameter, length, cutting edge angle, transition radius, etc. of each step. Surface quality inspection: Use a surface roughness tester to inspect the surface quality of the step drill to ensure that it meets the design requirements. S73: Analyze test data and compare it with the design model to evaluate machining accuracy. For out-of-tolerance parts, analyze the causes and propose improvement measures.

6. The integrated digital design and manufacturing method for a step drill according to claim 5, characterized in that: The inspection data is compared with the design model, and statistical process control algorithms are used to calculate the deviation values of various dimensions and geometric tolerances. If the deviation value exceeds the allowable range, the quality inspection software system automatically generates adjustment instructions and transmits them to the machine tool control system. The machine tool immediately adjusts the processing parameters such as tool compensation value and feed speed to correct the processing process and ensure that the quality of subsequent processed products meets the design standards. At the same time, the quality inspection data is fed back to the digital design module. Designers use data analysis to identify potential design problems and provide a strong basis for subsequent product design improvements.

7. The integrated digital design and manufacturing method for a step drill according to claim 1, characterized in that: The aforementioned relational database management system is used to build a database specifically for storing data from the entire process of step drill design, manufacturing, and testing. The database design follows the principle of standardization and is divided into multiple data tables. For example, the design parameter table stores design input parameters such as the diameter, length, and cutting edge angle of each step. The finite element analysis result table records stress distribution, deformation and other analysis data; the NC machining program table stores the generated NC code; The quality inspection data table stores key dimension inspection values, form and position tolerance inspection values, and deviation analysis results; To ensure the integrity, accuracy and security of the data, a database user authority management mechanism is set up. Personnel in different departments are assigned different data access rights according to work needs. For example, designers have read and write permissions for the design parameter table, manufacturing personnel only have read and execute permissions for the CNC machining program table, and quality inspectors have read and write permissions for the quality inspection data table to prevent data from being misoperated or illegally tampered with.

8. The integrated digital design and manufacturing method for a step drill according to claim 1, characterized in that: The data sharing service platform is built through the internal network architecture of the enterprise or with the help of cloud computing platform to realize data sharing and collaborative work among relevant departments such as design department, manufacturing department, quality inspection department, etc.; Staff from each department log in to the data sharing service platform through dedicated data access client software or browsers on their respective office terminals, and obtain the required data in real time according to their own permissions. For example, after logging in to the platform, designers can query the design parameters and finite element analysis results of previous similar step drill bit design projects to provide reference for current designs. Manufacturing personnel obtain the latest CNC machining programs to guide machine tool processing; Quality inspectors upload the latest quality inspection data to the platform for designers and manufacturers to review and analyze; Leveraging collaborative office software features, such as online document editing and project task management, promotes communication and collaboration across departments. Designers, based on quality inspection feedback, create design improvement plans in online documents. Manufacturing and quality inspection personnel participate in real-time discussions, offering feedback and suggestions. This enables efficient collaboration across departments and improves the company's overall operational efficiency and competitiveness.

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