CN115268845A - Normalized numerical control programming system - Google Patents

Abstract

The invention provides a normalized numerical control programming system, which comprises: the system comprises a process knowledge base construction module, a model preprocessing module and a process reasoning design module; the process knowledge base construction module is used for completing construction of a process template base, a process example base and a manufacturing resource base; the model preprocessing module is used for completing model input and benchmark determination of a workpiece to be processed; the process reasoning design module is used for outputting a process scheme of the workpiece to be processed according to the set process route rule, wherein the process scheme comprises processing path information. The system of the invention can effectively shorten the time of numerical control programming of the die and improve the process design and numerical control machining efficiency.

Description

Normalized numerical control programming system

Technical Field

The invention relates to the technical field of die manufacturing, in particular to a normalized numerical control programming system.

Background

With the rapid development of economy, the mold manufacturing and processing have extremely important positions. CAM programming is an important part in die numerical control machining, in order to machine products with different shapes, repeated work such as creation of a cutter and input of machining parameters is required when a machining sequence is generated during die numerical control programming, the number of cutter paths is dozens according to different complexity of die structures, process parameters required to be set for generating each cutter path are various, the frequency of artificial errors is very high, and programming efficiency is low. Zhang Lu et al created a grinding process database suitable for use in a numerically controlled camshaft grinder based on Siemens 840Dsl numerical control system platform. And the Wangcuan thousand and the like embed all process parameters, numerical control programming knowledge and database calling commands into a program compiled by an API (application program interface) operation function based on an NX secondary development technology, so that one-key numerical control code generation on a UI (user interface) is realized. The Luwenxuan adopts an example reasoning technology, and realizes the autonomous decision-making of the design process of the turbine blade machining process.

The research finds that the utilization rate of the process database is low, and the process parameter setting is unreasonable due to the absence of a reasonably standardized numerical control programming system.

Disclosure of Invention

In view of the above problems, the present invention is directed to a normalized numerical control programming system.

The purpose of the invention is realized by adopting the following technical scheme:

the invention provides a normalized numerical control programming system, which comprises: the system comprises a process knowledge base construction module, a model preprocessing module and a process reasoning design module;

the process knowledge base construction module is used for completing construction of a process template base, a process example base and a manufacturing resource base;

the model preprocessing module is used for completing model input and benchmark determination of a workpiece to be processed;

the process reasoning design module is used for outputting a process scheme of the workpiece to be processed according to the set process route rule, wherein the process scheme comprises processing path information.

In one embodiment, the process example library is used for storing processing examples corresponding to different part characteristics, wherein the processing examples comprise processing procedures, changing strategies, tool parameters and machine tool information;

the process template library is used for storing process templates with different processing precision requirements, wherein the process templates comprise processing strategies corresponding to the processing precision;

the manufacturing resource library comprises a tool library and a machine tool library and is used for storing equipment information and machining range information.

In one embodiment, the model preprocessing module includes a model input unit and a reference determination unit;

the model input unit is used for inputting a model needing programming;

the reference determining unit is used for loading the model in PowerMILL and setting the positioning reference of the workpiece to be processed.

In one embodiment, the process reasoning design module comprises:

and finishing the process scheme of the workpiece to be processed according to case reasoning-based process route planning, processing rule-based process route planning and/or case and processing rule-based process route reasoning.

In one embodiment, a process planning module for planning a process route based on case reasoning to complete a process recipe for a workpiece to be processed includes:

comparing the attributes of the workpiece to be processed with the attributes of the workpieces in the example library, and if the size of the most similar example part is completely the same as that of the workpiece to be processed, directly adopting the solution of the most similar example as a process scheme; and if a plurality of similar examples are searched, and the part size of each similar example is different from the size of the workpiece to be processed, referring to the process flow, making decisions on actual strategy modification and tool selection in a process template library and a manufacturing resource library, and finally determining a process scheme.

In one embodiment, the process route planning based on the processing rule in the process reasoning design module includes:

performing model analysis according to a workpiece to be processed, separating a characteristic surface, and matching a processing method chain according to the characteristic surface; generating a plurality of processing elements according to a processing method chain based on a processing element generating rule, and establishing a primary processing technological process scheme; sequencing according to the processing element and the processing procedure rule to establish a primary processing technological process scheme; and after finishing the creation of the processing elements of all the characteristic surfaces and establishing a primary processing technological process scheme, generating a complete technological scheme.

In one embodiment, a process planning module for planning a process of a workpiece to be processed based on a process route of an instance and a processing rule includes:

firstly, planning a process route of a workpiece to be processed based on example reasoning, calculating the similarity between the workpiece to be processed and an example library by using an example similarity algorithm, retrieving, and selecting a modification mode according to the size difference between the part in the retrieved example library and the workpiece to be processed until a primary process scheme is completed; and if no similar example exists, the process scheme of the workpiece to be processed is completed by planning a process route based on rules.

In one embodiment, the system further comprises an auxiliary function module;

the auxiliary function module is used for finishing the calculation and collision inspection of the tool path according to the technical scheme of the workpiece to be processed; and/or output a process file.

The invention has the beneficial effects that: the invention designs a standardized numerical control programming system. The system takes a standardized numerical control system as a development target, researches the construction of a process knowledge base, establishes a comprehensive reasoning mechanism based on examples and processing rules, develops a numerical control programming system based on standardized flow design by adopting a PowerMILL secondary development technology, and realizes the data interaction of a process database and CAM software. The system of the invention can effectively shorten the time of numerical control programming of the die and improve the process design and the numerical control machining efficiency.

Drawings

The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, without inventive effort, further drawings may be derived from the following figures.

FIG. 1 is a block diagram of a normalized CNC programming system according to the present invention;

FIG. 2 is a block diagram of a normalized CNC programming system according to the present invention;

FIG. 3 is a system framework diagram of a process knowledge base in accordance with an exemplary embodiment of the present invention;

FIG. 4 is a schematic diagram of an exemplary library of injection molds according to an exemplary embodiment of the present invention;

FIG. 5 is a schematic diagram illustrating encoding rules of part attribute information according to an exemplary embodiment of the present invention;

FIG. 6 is a schematic diagram of an example policy reading interface in accordance with an illustrative embodiment of the present invention;

FIG. 7 is a schematic diagram of a process template library configuration shown in an exemplary embodiment of the present invention;

FIG. 8 is a schematic diagram of a programming strategy interface in accordance with an exemplary embodiment of the present invention;

FIG. 9 is a schematic view of a tool library definition interface shown in an exemplary embodiment of the present invention;

FIG. 10 is a schematic diagram of an example retrieval and reuse flow according to an exemplary embodiment of the present invention;

FIG. 11 is a schematic illustration of manufacturing resources versus process knowledge and processing rules in accordance with an exemplary embodiment of the present invention;

FIG. 12 is a schematic diagram illustrating a correspondence between a machining area and a machining strategy of a part according to an exemplary embodiment of the present invention;

FIG. 13 is a schematic illustration of a process planning scheme based on process rules according to an exemplary embodiment of the present invention;

FIG. 14 is a schematic diagram of a model face color annotation interface in accordance with an exemplary embodiment of the present invention;

FIG. 15 is a schematic diagram of a comprehensive inference system based on examples and process rules, according to an exemplary embodiment of the present invention;

FIG. 16 is a schematic view of a tool path inspection interface shown in an exemplary embodiment of the present invention;

FIG. 17 is a flowchart illustrating operation of a normalized numerically controlled programming system in accordance with an exemplary embodiment of the present invention;

fig. 18 is a schematic structural diagram of a router front mold according to an exemplary embodiment of the present invention;

FIG. 19 is a schematic diagram of a router front model after model analysis in accordance with an exemplary embodiment of the present invention;

FIG. 20 is a schematic diagram of an interface for selecting a process template in accordance with an exemplary embodiment of the present invention;

FIG. 21 is a schematic view of a tool path sequencing interface shown in an exemplary embodiment of the present invention;

FIG. 22 is a schematic view of a manufacturing instruction according to an exemplary embodiment of the present invention;

Detailed Description

The invention is further described in connection with the following application scenarios.

The normalized numerical control programming system provided by the invention carries out secondary development on PowerMILL through a Visual basic NET interface, namely, on the basis of third-party software, a control class is added, and the purpose of automatically operating the PowerMILL is achieved by calling a corresponding function. The architecture of the system is shown in fig. 1.

Referring to fig. 2, the normalized numerical control programming system includes the following 4 modules: the system comprises a process knowledge base construction module, a model preprocessing module, a process reasoning design module and an auxiliary function module;

the process knowledge base construction module is used for completing construction of a process knowledge base, wherein the process knowledge base comprises a process template base, a process example base and a manufacturing resource base.

In one embodiment, the process knowledge base is mainly composed of 3 libraries, namely a process template base, a process example base and a manufacturing resource base. The architectural framework of the process knowledge base is shown in fig. 3.

1) The process example library is used for storing processing examples corresponding to different part characteristics, wherein the processing examples comprise processing procedures, changing strategies, tool parameters and machine tool information;

many features of similar shape, or the addition of grooves, holes, etc., are often encountered in the numerical control programming of molds, and the programming of these parts as a whole is largely consistent. The method comprises the steps of extracting feature information, process data and machining procedures of well-developed parts in enterprises, establishing an example library with a well-developed machining process, wherein the example is a reference standard in a programming machining process of machining a new part, and acquiring all the machining procedures, programming strategies and information of a tool and a machine tool used for machining of the example in the example library by one key. Taking an injection mold as an example, the configuration of the injection mold example library is shown in fig. 4.

In order to better manage the instance base, the instance base needs to be subjected to instance coding according to a naming rule, and a new instance is distinguished from other instances in the instance base. Table 1 shows the property codes of the partial mold parts.

TABLE 1 Attribute code for part of the mold

The encoding rule of the part attribute information is shown in fig. 5, and the attribute information of the part is described in a numerical arrangement.

After the name of the product component is created, the right function "read from item" can be directly selected, and the complete tool path content of the product component is read from powerfill by one key and a machining instance strategy library is added according to a tool path folder. FIG. 6 is a diagram of an example policy reading interface.

2) The process template library is used for storing process templates with different processing precision requirements, wherein the process templates comprise processing strategies corresponding to the processing precision;

the technological template is a tool path planning for the characteristic by programming the mould part to meet the requirement of the characteristic surface machining precision, and is practically used for datum roughing, surface semi-finishing, hole roughing, surface and hole finishing and the like. The tool and the process parameters used in each procedure can be saved as a process template, and the tool parameters, the processing strategies and the allowance are named and managed in a mode of tool parameters, processing strategies and allowance, so that the process template can be conveniently called in the subsequent part processing process. The process template library structure is shown in fig. 7.

Such as the programming strategy interface of the system shown in fig. 8. And clicking a 'read all' button in the interface, the system automatically reads the relevant parameters of all policies from the opened CAM items, and the change and the call are convenient.

3) The manufacturing resource library comprises a tool library and a machine tool library and is used for storing equipment information and machining range information.

The manufacturing resource library is divided into a tool library and a customization module of a machine tool library. The equipment information in the manufacturing resource library consists of basic information and processing range information of the equipment, wherein the basic information of the equipment is basic attributes of the equipment, such as the name, the type, the number and the like of the equipment; the processing range information is the processing capacity and the processing range of the processing device in the processing process, namely the processing application range of the equipment. Taking the tool library as an example, fig. 9 shows a system tool library definition interface.

Clicking 'PM read in' in the page can directly extract all set cutter information from the PowerMILL project file, and can also manually add and adjust the cutter information in the library. Meanwhile, clicking 'export ptf' or 'generate ptf file', storing the tool library in a PowerMILL macro command mode, and facilitating transmission and calling of tool information on different computers.

The model preprocessing module is used for finishing model input and benchmark determination of a workpiece to be processed.

In one embodiment, the model preprocessing module comprises a model input unit and a benchmark determination unit;

the model input unit is used for inputting a model to be programmed;

the benchmark determining unit is used for loading the model in PowerMILL and setting the positioning benchmark of the workpiece to be processed.

The preprocessing module mainly comprises two parts of model input and benchmark determination, wherein the first step is to input a model to be programmed into a system, and the formats of some models which can be recognized are mainly related, such as dgk, igs, prt and the like; and loading the model in PowerMILL, and setting the positioning reference of the workpiece to be processed in the next step, wherein the selection principle of the positioning reference is generally followed.

The process reasoning design module is used for outputting a process scheme of the workpiece to be processed according to the set process route rule, wherein the process scheme comprises processing path information.

In one embodiment, the process reasoning design module comprises:

and finishing the process scheme of the workpiece to be processed according to the example reasoning-based process route planning, the machining rule-based process route planning and/or the example and machining rule-based process route reasoning.

In one embodiment, in a process reasoning design module, a process scheme for planning a process route based on example reasoning to complete a workpiece to be processed includes:

comparing the attributes of the workpieces to be processed with the attributes of the workpieces in the case library, and if the size of the most similar case part is completely the same as that of the workpieces to be processed, directly adopting the solution of the most similar case as a process scheme; and if a plurality of similar examples are searched, and the part size of each similar example is different from the size of the workpiece to be processed, referring to the process flow, making decisions on actual strategy modification and tool selection in a process template library and a manufacturing resource library, and finally determining a process scheme.

Example retrieval (example inference) is essentially a comparison of some workpiece attributes between the workpiece to be processed and the workpieces in the example library, and fig. 10 shows an example retrieval and reuse flow.

If the size of the most similar example part is completely the same as that of the workpiece to be processed, the solution of the most similar example can be directly adopted; if a plurality of similar examples are searched, and the part size of each similar example is different from the size of the workpiece to be processed, the actual strategy modification and tool selection can be decided in the process template library and the manufacturing resource library by referring to the process flow, and finally, the solution is determined.

In one embodiment, the process route planning based on the processing rule in the process reasoning design module includes:

performing model analysis according to a workpiece to be processed, separating a characteristic surface, and matching a processing method chain according to the characteristic surface; generating a plurality of processing elements according to a processing method chain based on a processing element generating rule, and establishing a primary processing technological process scheme; sequencing according to the machining element and the machining procedure rule to establish a primary machining process flow scheme; and after finishing the creation of the processing elements of all the characteristic surfaces and establishing a primary processing technological process scheme, generating a complete technological scheme.

In the field of numerical control programming, the machining rules substantially help a workpiece to be machined to select a machining operation and a machining tool in the programming process so as to achieve the target machining characteristics and machining precision. In order to ensure the feasibility of processing, the processing precision, the process logic and the processing resource limitation of the basic characteristic surface are comprehensively considered, and the principle of numerical control processing planning is observed as follows.

And 1, a characteristic surface classification processing method chain matching rule.

For example, most of plastic products processed by the injection mold are different in shape, the number of characteristic surfaces needing programming processing of the mold is dozens, the processing precision and the roughness standard of each characteristic surface are different, but the characteristic surfaces needing programming processing of the parts of the mold of the same type are similar, and the parts are classified into groups according to the processing precision of each surface, so that data support is provided for the chain matching of the processing method of the subsequent characteristic surfaces. Table 2 shows the processing method chain (part) corresponding to the characteristic surface of the injection mold.

TABLE 2 chain of processing methods (parts) corresponding to characteristic surfaces of injection molds

2] the processing procedure is regular.

When the characteristic surface of the die is programmed by a cutter path, the sequence of the working procedures has a constraint effect, and the general working procedures of the part comprise rough machining, rough machining reference, finish machining reference top surface, finish machining reference appearance and finish machining part.

3] manufacturing resource selection rules.

The manufacturing resource library stores the specific parameters of hardware equipment resources such as the existing processing machine tools of enterprises, tool libraries available for different processing machine tools, and clamps used by matching the machine tools with the tools. FIG. 11 shows the relationship between manufacturing resources and process knowledge and processing rules.

4] routing rules of the feed.

The selection of the numerical control programming feed route is the selection of a processing strategy, and the selection of the reasonable rough processing feed route can quickly remove redundant materials, save the processing time and reach the processing technical standard of the characteristic surface. Fig. 12 shows the correspondence between the machining area and the machining strategy of the part.

And 5, setting rules of process parameters.

In order to improve the mold programming efficiency and the processing quality, the most effective method is to store the process parameters which need to be set according to experience in the mold programming and processing process in a process knowledge base for effective management. For example, the cutting parameters are linked with a machining strategy and a cutter, the cutting parameters used for rough machining are automatically recommended when the same cutter is selected for rough machining tool path compiling, and calling is carried out to replace empirical technological parameter setting in the daily numerical control programming and machining process of a die enterprise, so that the technological parameter setting of the whole part tends to be normalized.

The process planning scheme based on the machining rules is shown in fig. 13. In fig. 13, in the model analysis, the processing surface feature information of the processed part is obtained, all the feature surfaces to be processed are subjected to color marking differentiation, so that the condition that the feature surfaces are omitted when the processing method chain is matched is prevented, the part is unqualified in numerical control programming, and the model surface color marking interface is shown in fig. 14.

In one embodiment, a process planning module for planning a process of a workpiece to be processed based on a process route of an instance and a processing rule includes:

firstly, planning a process route of a workpiece to be processed based on example reasoning, calculating the similarity between the workpiece to be processed and a sample library by using an example similarity calculation method, searching, and selecting a modification mode according to the size difference between parts in the sample library and the workpiece to be processed until a preliminary process scheme is completed; and if no similar example exists, the process scheme of the workpiece to be processed is completed by planning a process route based on rules.

The simple process route reasoning mechanism can not solve the problems of process route planning, parameter calling and the like of actual numerical control programming, a set of comprehensive reasoning and decision mechanism is designed, and one of calling examples and processing rules is selected according to the condition of a new part to be programmed. Firstly, loading a part to be machined in a system, then entering a process route planning module based on an example, calculating the similarity between the part to be machined and a workpiece to be machined in an example library by using an example similarity calculation method, searching, and finally selecting a modification mode according to the size difference between the part to be machined and the workpiece to be machined in the searched example library until a preliminary process scheme is completed. If there are no similar instances, then the process enters a rule-based process route planning module. A comprehensive reasoning system based on examples and processing rules is shown in fig. 15.

The auxiliary function module is used for finishing the calculation and collision inspection of the tool path according to the technical scheme of the workpiece to be processed; and/or output a process file.

After the tool path is compiled, calculation and collision check of the tool path and output of subsequent process files are required, and a guide file is provided for subsequent machine tool machining. After the calculation of the cutter path and the collision check, the conditions of all cutter paths can be checked in a form of a table. Fig. 16 shows a tool path detection interface for a certain item.

The normalized numerical control programming system provided by the invention can reduce the programming workload of the traditional numerical control programming work, reduce the requirements of programming experience and stabilize the quality of numerical control programming.

The operation flow of the normalized numerical control programming system is shown in fig. 17.

Meanwhile, in order to further describe the operation process of the normalized numerically controlled programming system provided in the foregoing embodiment, in this embodiment, a certain brand of router front mold is taken as an example, and the normalized numerically controlled programming system is used to implement mold programming of the router front mold. The structure of which is shown at 18.

The normalized number programming system based on the PowerMILL is started, the mold part models are loaded, all feature faces to be processed of the router front mold are subjected to quick color marking distinguishing through the model analysis function of the system, and the processing feature faces are prevented from being omitted. The router front model after model analysis is shown in fig. 19.

And then, matching the machining precision and the roughness of the characteristic surface to obtain a machining chain of each machining surface, and calling a process template in the system to generate machining elements in the characteristic surface machining method chain to be machined. FIG. 20 illustrates an interface for selecting a process template.

After finishing the creation of the processing elements of all the characteristic surfaces, the system sorts the processing elements according to the processing procedure rules, classifies the cutter paths of the same cutter into the same folder, traverses the procedure names of all the cutter paths, and judges whether the procedures of the same characteristic surface accord with the procedure logic relation cutter paths. The tool path sequencing interface is shown in fig. 21.

And after the compiling of all the cutter paths of the router front module is finished, calculating and collision checking the cutter path of the current project by using the cutter path calculating and checking function of the system user interaction interface. After all the tool paths are checked to be qualified, the user interaction interface of the system can output the NC programs of all the tool paths by one key and generate the machining instruction of the router front model, and the machining instruction is shown in fig. 22.

Programming efficiency analysis as shown in table 3, when the router front mold is programmed by adopting the standardized numerical control programming system, the cutter is directly selected, the processing template is called to reduce the programming time from 4h15min to 2h8min, the programming efficiency is improved by 50%, and the processing efficiency is improved by 30%.

TABLE 3 analysis of programming efficiency

Aiming at the problems that the numerical control programming work of a die enterprise does not have a standard system, the numerical control programming flow is not uniform, the dependence on the numerical control programming experience is strong, the excellent processing technology is not effectively inherited and the like, a standardized numerical control programming system is designed. The system takes a standardized numerical control system as a development target, researches the construction of a process knowledge base, establishes a comprehensive reasoning mechanism based on examples and processing rules, develops a numerical control programming system based on standardized flow design by adopting a PowerMILL secondary development technology, and realizes the data interaction of a process database and CAM software. The results show that: the system can effectively shorten the numerical control programming time of the die and improve the process design and the numerical control machining efficiency.

It should be noted that, functional units/modules in the embodiments of the present invention may be integrated into one processing unit/module, or each unit/module may exist alone physically, or two or more units/modules are integrated into one unit/module. The integrated units/modules may be implemented in the form of hardware, or may be implemented in the form of software functional units/modules.

From the above description of embodiments, it is clear for a person skilled in the art that the embodiments described herein can be implemented in hardware, software, firmware, middleware, code or any appropriate combination thereof. For a hardware implementation, a processor may be implemented in one or more of the following units: an Application Specific Integrated Circuit (ASIC), a Digital Signal Processor (DSP), a Digital Signal Processing Device (DSPD), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), a processor, a controller, a microcontroller, a microprocessor, other electronic units designed to perform the functions described herein, or a combination thereof. For a software implementation, some or all of the procedures of an embodiment may be performed by a computer program instructing associated hardware. In practice, the program may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a computer. Computer-readable media can include, but is not limited to, RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be analyzed by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims (8)

1. A normalized numerical control programming system, comprising: the system comprises a process knowledge base construction module, a model preprocessing module and a process reasoning design module;

the process knowledge base construction module is used for completing construction of a process template base, a process example base and a manufacturing resource base;

the model preprocessing module is used for completing model input and benchmark determination of a workpiece to be processed;

the process reasoning design module is used for outputting a process scheme of the workpiece to be processed according to the set process route rule, wherein the process scheme comprises processing path information.

2. The normalized numerical control programming system according to claim 1, wherein the process instance library is used for storing processing instances corresponding to different part features, wherein the processing instances comprise processing procedures, change strategies, tool parameters and machine tool information;

the process template library is used for storing process templates with different processing precision requirements, wherein the process templates comprise processing strategies corresponding to the processing precision;

the manufacturing resource library comprises a tool library and a machine tool library and is used for storing equipment information and machining range information.

3. The normalized numerical control programming system according to claim 1, wherein the model preprocessing module comprises a model input unit and a reference determination unit;

the model input unit is used for inputting a model to be programmed;

the reference determining unit is used for loading the model in PowerMILL and setting the positioning reference of the workpiece to be processed.

4. The normalized numerical control programming system of claim 3, wherein the process reasoning design module comprises:

and finishing the process scheme of the workpiece to be processed according to case reasoning-based process route planning, processing rule-based process route planning and/or case and processing rule-based process route reasoning.

5. The normalized numerical control programming system according to claim 4, wherein the process planning module, based on example reasoning, for planning the process recipe for the workpiece to be processed comprises:

comparing the attributes of the workpieces to be processed with the attributes of the workpieces in the case library, and if the size of the most similar case part is completely the same as that of the workpieces to be processed, directly adopting the solution of the most similar case as a process scheme; and if a plurality of similar examples are searched, and the part size of each similar example is different from the size of the workpiece to be processed, referring to the process flow, making decisions on actual strategy modification and tool selection in a process template library and a manufacturing resource library, and finally determining a process scheme.

6. The normalized numerical control programming system according to claim 4, wherein the process reasoning design module based on the process rule comprises:

performing model analysis according to a workpiece to be processed, separating a characteristic surface, and matching a processing method chain according to the characteristic surface; generating a plurality of processing elements according to a processing method chain based on a processing element generation rule, and establishing a primary processing technological process scheme; sequencing according to the processing element and the processing procedure rule to establish a primary processing technological process scheme; and after finishing the creation of the processing elements of all the characteristic surfaces and establishing a primary processing technological process scheme, generating a complete technological scheme.

7. The normalized numerical control programming system according to claim 4, wherein the process reasoning designing module is configured to perform a process recipe for a workpiece to be processed based on a process route reasoning of an instance and a processing rule, and the process recipe comprises:

firstly, planning a process route of a workpiece to be processed based on example reasoning, calculating the similarity between the workpiece to be processed and an example library by using an example similarity algorithm, retrieving, and selecting a modification mode according to the size difference between the part in the retrieved example library and the workpiece to be processed until a primary process scheme is completed; and if no similar example exists, the process scheme of the workpiece to be processed is completed by planning a process route based on rules.

8. A normalized numerical control programming system according to claim 1, further comprising an auxiliary function module;

the auxiliary function module is used for completing calculation and collision check of a tool path according to the technical scheme of the workpiece to be processed; and/or output a process file.

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