CN1577338A - Metal plate pressed computer auxiliary producing system and method - Google Patents

Abstract

The invention discloses a sheet metal stamping computer-aided manufacturing system and method. The system includes a server, a database and a plurality of client computers, and the system is connected with a life management system through a network. The server is used to automatically select tools according to the characteristic parameters of workpiece primitives and the allowable processing error range, install and arrange tools, optimize the cutter head, simulate the processing status, judge whether the tool arrangement and CNC code are correct, and compare the CNC code, machine model, The processing data and materials are imported into the production management system, and the production management system generates a report and saves it in the database. The server includes a customer image file processing module, a tool maintenance module, a tool selection module, a tool row module, a cutter head optimization module, a CNC code generation module, a CNC code simulation module and a lifetime management module. The system and method can improve labor productivity, reduce labor intensity of sheet metal stamping operators, and reduce human error operations.

Description

Sheet Metal Stamping Computer Aided Manufacturing System and Method

【Technical field】

The present invention relates to a computer aided manufacturing system and method, in particular to a sheet metal stamping computer aided manufacturing system and method.

【Background technique】

The competition of modern enterprises is becoming more and more fierce. In order to ensure the market competitiveness of enterprises, how to improve production efficiency has become a major focus of attention of enterprises. With the improvement of computer hardware performance and the reduction of prices, the application of computers in sheet metal stamping activities has been popularized, which has greatly improved the speed and quality of sheet metal stamping. The current sheet metal stamping mainly uses CAD to establish a three-dimensional model, define the workpiece to be processed, generate the tool path, and finally generate the processing code, and then transmit it to the machining center through a floppy disk, a portable computer or DNC to process the part entity.

The shortcomings of the current sheet metal stamping: from the establishment of the model to the final generation of the processing code, people need to control it, and the streamlining of the entire sheet metal stamping operation cannot be realized.

In order to solve the above shortcomings, it is necessary to provide a computer-aided manufacturing system and method for sheet metal stamping, which can automatically select tools, install and arrange tools, optimize cutter heads, simulate processing status and transfer relevant production management data according to customer drawings. Import the production management system and generate a report for the processing site by the production management system, thereby improving labor productivity and reducing the labor intensity of sheet metal stamping operators and reducing human error operations.

【Content of invention】

The main purpose of the present invention is to provide a computer-aided manufacturing system and method for sheet metal stamping, which can automatically select tools, install and arrange tools, optimize cutter heads, and simulate processing states according to customer drawings.

Another object of the present invention is to provide a computer-aided manufacturing system and method for sheet metal stamping, which performs processing simulation according to customer drawings, imports relevant production management data into the production management system, and generates a production management system for the processing site. The report, in which the relevant production management information includes: CNC code file, machine tool model, processing information and material.

The invention discloses a sheet metal stamping computer aided manufacturing system. The sheet metal stamping computer aided manufacturing system includes a server, a database and multiple client computers. Multiple client computers are connected to a server through a network; the server is connected to a database through a database connection; the client computers access the server through the network to check the processing status and processing drawings to understand the processing situation. The content stored in the database includes: customer drawing files, tool data, cutter head data, tool arrangement data, related production management data, processing drawing files, and reports. Among them, the server selects the tool according to the characteristic parameters of the workpiece graphic element and the allowable processing error range, installs the tool and arranges the tool, optimizes the cutter head, simulates the processing state, and imports the CNC code, machine model, processing data and material into the production management system. The system generates a report, which provides a physical usage list and a report on processing conditions for on-site processing.

The present invention also provides a computer-aided manufacturing method for sheet metal stamping, which includes the following steps: (a) reading the customer's drawing file and obtaining workpiece information; (b) selecting tool; (c) install the tool and arrange the tool, and record the data of the tool arrangement; (d) optimize the cutter head based on the principle of the shortest tool switching time; (e) generate CNC code; (f) code simulation; (g) generate a Reports, providing physical usage lists and processing status reports for on-site processing.

【Description of drawings】

Fig. 1 is a hardware architecture diagram of the sheet metal stamping computer-aided manufacturing system of the present invention.

Fig. 2 is a functional block diagram of the server of the present invention.

Fig. 3 is a flow chart of the computer-aided manufacturing method for sheet metal stamping of the present invention.

Fig. 4 is a flow chart of tool selection for the sheet metal stamping computer-aided manufacturing method of the present invention.

Fig. 5 is a flow chart of cutter head optimization for the sheet metal stamping computer-aided manufacturing method of the present invention.

Fig. 6 is a code simulation flowchart of the sheet metal stamping computer-aided manufacturing method of the present invention.

【Detailed ways】

As shown in FIG. 1 , it is a hardware architecture diagram of the sheet metal stamping computer-aided manufacturing system of the present invention. Multiple distributed client computers 6 are connected to a server 1 through a network 4; the server 1 is connected to a database 2 through a connection 5; Wherein, network 4 is a kind of electronic network, and it can be intranet (Intranet), Internet (Internet) or other types of network connection 5 is a kind of database connection, as open database connection (Open DatabaseConnectivity, ODBC), Or Java Database Connectivity (Java DatabaseConnectivity, JDBC), etc. The client computer 6 provides an interactive user interface for the customer, through which the customer can check the processing situation and the cutter arrangement situation reflected in the processing graphics. Database 2 is used to save customer drawings, tool data, cutter head data, tool arrangement data, related production management data, processing drawings, reports, etc. Wherein, the customer's graphic file includes a plurality of workpieces, and the workpiece includes a plurality of primitives; the primitives are the smallest units for processing. The tool data records the specifications and characteristic parameters of each type of tool; the cutter head data records all the tool types, tool position sizes and distribution in the cutter head; the tool row data records the tool position and Optimal processing path (processing sequence of the same tool). Relevant production management information includes: machine tool model, material, processing data, CNC code file. Server 1 is used to read in customer drawings and obtain workpiece information, select tools, install and arrange tools side by side, optimize tool heads, generate CNC codes, simulate CNC codes, and import CNC codes, machine models, processing data and materials into the production management system A report is generated by the production management system. Among them, tool arrangement is to arrange the best processing path for the same tool.

As shown in FIG. 2 , it is a functional block diagram of the server of the present invention. The server 1 includes a customer image file processing module 10, a tool maintenance module 20, a tool selection module 30, a row tool module 40, a cutter head optimization module 50, a CNC code generation module 60, a CNC code simulation module 70 and A tube module 80 is provided. The customer drawing processing module 10 is used to receive the drawing from the client computer 6 through the network 4, store it in the database 2, and can be used to read the customer drawing and obtain the workpiece information in the drawing. The tool maintenance module 20 is used to modify the characteristic parameters of the tool, delete or replace the tool. The tool selection module 30 is used to select the optimal tool according to the characteristic parameters of the primitive and the processing error range allowed by the customer. Wherein, the characteristic parameters of the primitive include the shape and size of the primitive. The module includes a condition maintenance sub-module 310 , a matching sub-module 320 and a retrieval sub-module 330 . Among them, the condition maintenance sub-module 310 is used to calculate the precise condition according to the shape and size of the primitive, and calculate the fuzzy condition according to the material and the tool processing error range allowed by the customer. The precise condition and the fuzzy condition are used between the primitive and the tool. Matching, that is, what kind of tool is selected to process the primitive. The matching sub-module 320 is used to match the tools in the cutterhead according to precise conditions and fuzzy conditions. When the tool in the cutter head does not match the graphics entity, the retrieval sub-module 330 searches the database for corresponding tool data. The cutter arrangement module 40 is used to find the corresponding cutter position according to the cutterhead model and the specification of the cutter, load the cutter into the cutterhead and arrange the best processing path of the same cutter. The cutterhead optimization module 50 optimizes the arrangement of cutter positions according to the processing sequence of all cutters. The CNC code generating module 60 is used for generating CNC codes according to the optimized tool head data and storing them in the database 2 . The CNC code simulation module 70 is used for simulating the processing state according to the generated CNC code, analyzing the CNC code, querying the tool, correcting the wrong CNC code, generating a processing image file and saving it in the database 2 . The production management module 80 is used to import CNC codes, machine tool models, processing data and materials into the production management system 3, and the production management system 3 calculates the processing man-hours and plate utilization rate and generates a report for on-site processing.

As shown in FIG. 3 , it is a flow chart of the computer-aided manufacturing method for sheet metal stamping of the present invention. The customer profile processing module 10 reads the customer profile and obtains workpiece information (step S301). The tool selection module 30 selects a tool according to the shape, size and allowable error range of the graphic element in the customer's graphic file (step S302). The tool arrangement module 40 finds the corresponding tool position according to the model of the cutterhead and the specification of the cutter, loads the cutter into the cutterhead and arranges the best machining path for the same cutter (step S303 ). The cutter head optimization module 50 rearranges and optimizes the tools on the cutter head according to the machining sequence of the tools and on the principle of the shortest tool change time of the cutter head (step S304 ). The CNC code generation module 60 generates CNC codes according to the optimized cutter data (step S305). The CNC code simulation module 70 analyzes each row of CNC codes, and simulates the processing status after checking that the tool is correct (step S306). The production management module 80 imports CNC codes, machine tool models, processing data and materials into the production management system 3, and the production management system 3 calculates the processing hours and sheet material utilization and generates a report for on-site processing (step S307).

As shown in FIG. 4 , it is a flow chart of automatic tool selection for the sheet metal stamping computer-aided manufacturing method of the present invention. The customer profile processing module 10 reads the customer profile and obtains workpiece information (step S401). The condition maintenance sub-module 310 calculates the precise condition of the primitive according to the shape and size of the primitive in the customer's graphic file, and calculates the fuzzy condition of the primitive according to the processing material and the allowable error range of tool processing (step S402). The matching sub-module 320 first judges whether the same graphic element has been processed before (step S403), if the same graphic element has been processed before, then the same tool is selected (step S404), if the same graphic element has not been processed, then the judgment tool Whether there is a tool matching the precise condition of the primitive in the disk (step S405), if there is a tool matching the precise condition of the primitive in the cutterhead, then select the matching tool on the cutterhead (step S406). If there is no tool matched with the precise condition of the graphic element in the cutter head, the retrieval submodule 330 searches the database for corresponding tool data according to the precise retrieval condition of the graphic element (step S407), and judges whether there is a corresponding tool data in the database (step S407) S408), if there is corresponding cutter data, then judge whether the cutter head can hold the cutter according to the cutter head model, the size of the cutter position and the cutter specification (step S409), if there is no corresponding cutter data or the cutter head can not hold the cutter , then the matching sub-module 320 judges whether there is a tool matching the fuzzy condition of the primitive in the cutterhead (step S410), if there is a tool matching the fuzzy condition of the primitive in the cutterhead, then select the corresponding tool (step S411) . If there is no tool matching the fuzzy condition of the primitive in the cutter head, the retrieval sub-module 330 searches the database for corresponding tool data according to the fuzzy retrieval condition of the primitive (step S412 ). The cutter arrangement module 40 finds the corresponding cutter position according to the cutterhead model and cutter specifications, loads the above-mentioned selected cutters into the cutterhead, schedules the best processing path for the same cutter (that is, arranges the graphics elements), and records the cutter arrangement data (step S413).

As shown in FIG. 5 , it is a flow chart of cutter head optimization for the sheet metal stamping computer-aided manufacturing method of the present invention. Firstly, the cutter head optimization module 50 reads the cutter arrangement data stored in the database (step S501 ). Determine tool machining sequence (step S502). Select a reference tool and designate a tool position for the tool (step S503). Judging whether other remaining cutters are fixed cutters according to cutter specifications (step S504), if it is a fixed cutter, then put the fixed cutter into a fixed knife position (step S505), if it is not a fixed cutter, then judge whether it can be optimized with the same diameter (Step S506 ), wherein, the same-diameter optimization is to place two consecutive tools of the same type on the same diameter. If the same diameter can be optimized, install two consecutive knives on the same diameter of the cutter head. If it is not possible to optimize the same diameter, then calculate the angle between the unoptimized tool and the previous tool in the cutter head, place the current tool at the knife position with the smallest angle with the previous tool (step S507), record the optimized Cutter data (step S509 ), the CNC code generating module 60 combines the optimized cutter data to generate CNC code and save it in the database (step S510 ).

As shown in Fig. 6, it is a CNC code simulation flow chart of the sheet metal stamping computer-aided manufacturing method of the present invention. The CNC code simulation module 70 reads the CNC code file (step S601), establishes the cutter shape according to the cutter specifications in the CNC code file, simulates the processing state (step S602) in conjunction with the cutter machining sequence, and judges whether the cutter CNC code and the cutter are Correct (step S603), if not correct, modify the tool characteristic parameters and CNC code (step S604), if correct, generate a processing image file, save the processing image file and CNC file.

Claims (18)

1. A computer-aided manufacturing system for sheet metal stamping, which can automate tool selection, tool loading and tool arrangement, tool head optimization, and simulate processing status. It includes a server and multiple client computers connected through the network. Its features in: Database, used to save customer drawings, tool data, cutterhead data, tool arrangement data, related production management data, processing drawings, reports; Servers, including: A tool selection module, which is used to read the customer's drawing file, obtain the workpiece information, and select the optimal tool to process the drawing element according to the shape and size of the drawing element in the workpiece and the processing error range allowed by the customer; A cutterhead optimization module, which re-arranges and optimizes the cutters on the cutterhead according to the tool processing sequence based on the principle of the shortest tool switching time; A CNC code generation module, which can generate CNC code files according to the optimized cutterhead data and save them in the database; A CNC code simulation module, which can simulate the processing state through the CNC code file, judge whether the CNC code and the tool are correct, and generate a processing graphic file; The client computer can query the processing graphics, and view the tool arrangement and processing graphics through the processing graphics. 2. The computer-aided manufacturing system for sheet metal stamping according to claim 1, wherein the server further includes a client image file processing module for receiving image files from the client and storing them in the database. 3. The sheet metal stamping computer-aided manufacturing system according to claim 1, wherein the server further includes a tool maintenance module for modifying characteristic parameters, deleting or replacing tools according to processing requirements. 4. The computer-aided manufacturing system for sheet metal stamping according to claim 1, wherein the server further includes a tool arrangement module, which is used to determine the best processing path and record tool arrangement data according to the distribution of graphic elements. 5. The computer-aided manufacturing system for sheet metal stamping as claimed in claim 1, wherein the server also includes a first pipe module, which can calculate processing man-hours and plate utilization ratios according to the relevant production pipe data provided by the database, and generate a Reports for on-site processing. 6. The computer-aided manufacturing system for sheet metal stamping according to claim 1, wherein the tool selection module further includes a condition maintenance sub-module for calculating the precise condition and fuzzy condition of the graphic element. 7. The computer-aided manufacturing system for sheet metal stamping according to claim 1, wherein the tool selection module further includes a matching sub-module, which is used for precise and fuzzy condition matching between the tool and the graphic element in the cutter head. 8. The computer-aided manufacturing system for sheet metal stamping according to claim 1, wherein the tool selection module further includes a retrieval sub-module, which can be used to search the database when there is no tool in the cutter head that can match the graphic element Retrieve the corresponding tool data in the 9. A computer-aided manufacturing method for sheet metal stamping, which can automate tool selection, tool loading and tool arrangement, cutter head optimization, and simulated processing status, and is characterized in that the method includes the following steps: Read customer drawings and obtain workpiece information; Select the tool according to the shape and size of the graphic element and the allowable processing error range of the customer; Install the tool and schedule the best machining path for the same tool, and record the tool arrangement data; Based on the principle of the shortest tool switching time on the cutter head, the arrangement of the cutter positions in the cutter head is optimized; Generate CNC code according to the optimized cutter head data and save it in the database; Read the CNC code file, simulate the processing status, analyze the CNC code and query the tool, and judge whether the CNC code and the tool are correct. If they are correct, generate a processing drawing file, and save the processing drawing file and CNC file. 10. The computer-aided manufacturing method for sheet metal stamping as claimed in claim 9, wherein the step of selecting the cutting tool includes calculating the precise condition and the fuzzy condition respectively according to the shape, size and sheet material of the graphic element, and the processing error range allowed by the customer, and judging whether The same entity has been processed before, and if the same entity has been processed before, the same tool is selected. 11. The computer-aided manufacturing method for sheet metal stamping according to claim 10, wherein the step of selecting a tool further includes if the same graphic element has not been processed, then judging whether there is a tool in the cutterhead that matches the exact condition of the graphic element , if there is a matching tool, select the matching tool on the cutter head. 12. The computer-aided manufacturing method for sheet metal stamping as claimed in claim 11, wherein the step of selecting a tool further includes if there is no tool matching the exact condition of the graphics element in the cutterhead, using the exact condition to enter the database Retrieve whether there is a corresponding tool data, if there is a corresponding tool data, judge whether the cutter head can hold the tool, if it can hold the tool, select the tool. 13. The computer-aided manufacturing method for sheet metal stamping as claimed in claim 11, wherein the step of selecting a tool further includes if the cutter head cannot hold the tool, judging whether there is a tool matching the fuzzy condition of the graphic element in the cutter head, if If there is a tool matching the fuzzy condition of the primitive, select the tool. 14. The computer-aided manufacturing method for sheet metal stamping as claimed in claim 12, wherein the step of selecting a tool further includes if there is no tool matching the fuzzy condition of the graphic element, then using the fuzzy condition to search the corresponding tool data in the database . 15. The sheet metal stamping computer-aided manufacturing method according to claim 9, wherein the optimization step of arranging the positions of the knives in the cutter head further includes reading in the data of the knives arrangement, determining the processing sequence, selecting the reference tool, Determine whether it is a fixed tool according to the tool specification. If it is a fixed tool, install the fixed tool on the fixed tool position. 16. The sheet metal stamping computer-aided manufacturing method according to claim 15, wherein the optimization step of arranging the positions of the knives in the cutter head further includes if it is not a fixed tool, then judging whether the same diameter can be optimized, if If it can be optimized with the same path, it will be optimized with the same path. 17. The computer-aided manufacturing method for sheet metal stamping according to claim 15, wherein the step of optimizing the arrangement of the cutter positions in the cutter head further includes calculating the difference between the unoptimized cutter and the previous one if the same diameter cannot be optimized. The included angle of the tool, place the current tool in the tool position with the smallest included angle with the previous tool, record the cutter head data, generate CNC code and save it. 18. The computer-aided manufacturing method for sheet metal stamping according to claim 9, characterized in that after the step of simulating the processing state, it also includes a step of importing relevant production pipe data into the production pipe system, and the production pipe system calculates the processing hours and plate utilization , to generate a step for on-site processing report.

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