Quick generation method for four-cylinder crankshaft machining program and machining program adjustment method

Abstract

The invention discloses a rapid generation method for a four-cylinder crankshaft machining program and a machining program adjustment method, and the generation method comprises the steps: inputting a workpiece appearance parameter, and generating an appearance parameter subprogram; workpiece machining parameters are input, and a machining parameter subprogram is generated; connecting rod neck roundness parameters are input, and a roundness parameter subprogram is generated; the appearance parameter subprogram, the machining parameter subprogram and the roundness parameter subprogram are added into a main program, and a workpiece machining program is generated for the first time; measuring appearance data of the machined workpiece, calculating an error value between the appearance data of the workpiece and set appearance data of the crankshaft, judging whether the error value meets a set error range or not, if yes, taking the current workpiece machining program as a final machining program, and if not, taking the current workpiece machining program as a final machining program; otherwise, inputting a corresponding shape compensation parameter, a machining compensation parameter and a roundness compensation parameter, generating a corresponding compensation parameter subprogram, and generating a workpiece machining program again. According to the method, the crankshaft machining program can be quickly generated.

Description

Technical Field

[0001] This invention relates to the field of crankshaft machining technology, and more specifically, to a method for rapidly generating and adjusting machining programs for four-cylinder crankshafts. Background Technology

[0002] Currently, there are two main methods for generating CNC programs for crankshaft machining: manual programming and CNC programming software. Both methods suffer from limitations due to machine tool errors, meaning the generated program cannot guarantee that the workpiece will fully meet machining standards. This necessitates repeated modifications to the program parameters based on the completed workpiece, leading to a complex and inefficient program generation process. Furthermore, when the crankshaft's dimensions change, a new CNC program must be manually created for the new crankshaft shape, or a new program must be generated using CNC programming software. Both of these methods require significant downtime and carry the risk of errors when creating a new crankshaft CNC program. Summary of the Invention

[0003] The purpose of this invention is to propose a rapid generation method and a machining program adjustment method for four-cylinder crankshaft machining, so as to realize the rapid generation of crankshaft machining programs, improve the accuracy, efficiency and automation level of crankshaft machining, and ensure that the machined crankshaft can meet the high performance requirements of modern engines.

[0004] To achieve the above objectives, in a first aspect, the present invention proposes a method for rapidly generating machining programs for four-cylinder crankshafts, comprising: S1: Develop a four-cylinder crankshaft machining program application software, which includes a shape parameter setting module, a machining parameter setting module, a roundness parameter setting module, a compensation parameter setting module, and a main program setting module; S2: Input the workpiece shape parameters through the shape parameter setting module and generate a shape parameter subroutine; S3: Input the workpiece machining parameters through the machining parameter setting module and generate a machining parameter subroutine; S4: Input the roundness parameters of the connecting rod neck through the roundness parameter setting module, and generate a roundness parameter subroutine; S5: The shape parameter subroutine, the machining parameter subroutine, and the roundness parameter subroutine are added to the main program through the main program setting module to generate the workpiece machining program for the first time, and the workpiece is machined based on the first generated workpiece machining program; S6: Measure the workpiece shape data after processing, calculate the error value between the workpiece shape data and the crankshaft set shape data, and determine whether the error value meets the set error range. If yes, proceed to step S9; otherwise, proceed to step S7. S7: Input the corresponding shape compensation parameters, machining compensation parameters and roundness compensation parameters through the compensation parameter setting module, and generate the corresponding compensation parameter subroutine; S8: Add the compensation parameter subroutine to the main program through the main program setting module, and generate the workpiece processing program again to perform parameter compensation processing on the workpiece. After processing the workpiece, return to step S6. S9: Use the current workpiece machining program as the final machining program to generate the four-cylinder crankshaft machining program.

[0005] Optionally, in step S2, the shape parameter subroutine is used to generate a three-dimensional model of the four-cylinder crankshaft; The input workpiece shape parameters include: diameter parameters, length parameters, and position parameters of each part of the crankshaft, such as the connecting rod journal, main journal, balance disc, and signal disc.

[0006] Optionally, in step S2, when the workpiece shape parameters are input, the diameter, length and position parameters of each part of the crankshaft, such as the connecting rod journal, main journal, balance disc and signal disc, are replaced by variables, and the parameters are transformed into specific values.

[0007] Optionally, before performing step S3, the method further includes: calculating the machine tool turning parameters based on the dimensions of the cutter head, blank, machined part, and machine tool, and determining the coordinate points for machining.

[0008] Optionally, in step S3, the input machining parameters include the process parameters of the corresponding machining parts of the connecting rod journal, main journal, balance disc, and signal disc.

[0009] Optionally, the process parameters include: offset value X, offset value Z, offset value CH, offset value U, offset value W, offset value CG, cutter head diameter, rough milling journal R0, finish milling journal F0, electric spindle SP1 speed, electric spindle SP2 speed, C feed speed, cutting angle, cutting distance, starting angle, and ending angle.

[0010] Optionally, in step S3, the input connecting rod neck roundness parameters include the roundness parameters of each connecting rod neck cut surface divided into eight equally spaced circular arc cylindrical surfaces.

[0011] Optionally, in step S6, the workpiece shape data after processing is measured, the error value between the workpiece shape data and the crankshaft set shape data is calculated, and it is determined whether the error value meets the set error range, including: The actual workpiece after processing is measured to obtain its shape and position parameters. The measured shape and position parameters are compared with the preset dimensions and position parameters to obtain the dimensional and position error values ​​of each part of the workpiece. The corresponding error values ​​are used to determine whether the set shape error range is met.

[0012] Optionally, in step S7, the compensation parameter setting module includes a shape compensation parameter submodule, a machining compensation parameter submodule, and a roundness compensation parameter submodule; For workpiece parts whose error values ​​exceed the set error range, the corresponding shape compensation parameters, machining compensation parameters, and roundness compensation parameters are input through the shape compensation parameter submodule, machining compensation parameter submodule, and roundness compensation parameter submodule, respectively, and shape compensation parameter subroutines, machining compensation parameter subroutines, and roundness compensation parameter subroutines are generated respectively.

[0013] Secondly, the present invention proposes a rapid adjustment method for a four-cylinder crankshaft machining program, used to adjust the machining program generated by the rapid generation method for a four-cylinder crankshaft machining program described in the first aspect, including: When the external dimensions of the crankshaft being machined change, obtain the external parameters corresponding to the parts of the crankshaft whose dimensions have changed compared to the previous crankshaft being machined; The original shape parameter subroutine is modified by the shape parameter setting module, the workpiece shape parameters corresponding to the part whose size has changed are input, and the shape parameter subroutine is saved. The original processing parameter subroutine is modified through the processing parameter setting module, the workpiece processing parameters corresponding to the part whose size has changed are input, and the processing parameter subroutine is saved. The original roundness parameter subroutine is modified by the roundness parameter setting module. The roundness parameters of the connecting rod neck corresponding to the changed size are input and the roundness parameter subroutine is saved. The modified shape parameter subroutine, machining parameter subroutine, and roundness parameter subroutine are added to the main program through the main program setting module, and the crankshaft machining program is regenerated.

[0014] The beneficial effects of this invention are as follows: The rapid generation method for machining programs of this invention first develops a four-cylinder crankshaft machining program application software. Based on this software, the workpiece shape parameters are first input through the shape parameter setting module, generating a shape parameter subroutine. Then, the workpiece machining parameters are input through the machining parameter setting module, generating a machining parameter subroutine. Next, the connecting rod journal roundness parameters are input through the roundness parameter setting module, generating a roundness parameter subroutine. Finally, the shape parameter subroutine, machining parameter subroutine, and roundness parameter subroutine are added to the main program through the main program setting module, generating the initial workpiece machining program. The workpiece is then machined based on this initial machining program. After the initial machining, the process is completed according to the obtained... The processed data is compared with the preset error value of the workpiece shape to determine whether the workpiece processing program is complete. If the preset requirements are met, the workpiece processing program is generated; otherwise, the workpiece shape compensation parameters, processing compensation parameters, and roundness compensation parameters are input through the compensation parameter setting module. After inputting the compensation parameters and completing the processing, the process returns to the judgment step. After judgment, if the preset values ​​are met, the workpiece processing step is completed; otherwise, the compensation parameters are input repeatedly until the preset requirements are met. This invention can shorten the time for crankshaft 3D modeling, processing parameter setting, and workpiece roundness parameter setting, and can quickly generate crankshaft processing programs. Through this invention, the step of generating shape parameters can replace the traditional modeling step. Furthermore, when the dimensions of the crankshaft being processed change, the data corresponding to the changed dimensions can be directly modified, realizing rapid modification of the workpiece processing program.

[0015] The method of the present invention has other features and advantages that will be apparent from or will be set forth in detail in the accompanying drawings and following detailed description, which together serve to explain the particular principles of the invention. Attached Figure Description

[0016] The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings, in which like reference numerals generally denote like parts.

[0017] Figure 1 A flowchart illustrating the steps of a method for rapidly generating machining programs for a four-cylinder crankshaft according to an embodiment of the present invention is shown.

[0018] Figure 2 The diagram shows the software interface of the processing parameter setting module in one embodiment of the present invention.

[0019] Figure 3 The diagram shows the software interface of the compensation parameter setting module in one embodiment of the present invention.

[0020] Figure 4 The diagram shows the software interface of the main program settings module in one embodiment of the present invention.

[0021] Figure 5 A schematic diagram of crankshaft profile parameters according to one embodiment of the present invention is shown.

[0022] Figure 6 This diagram illustrates the roundness partitioning of the connecting rod neck in one embodiment of the present invention. Detailed Implementation

[0023] The invention will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Example 1

[0024] like Figure 1 As shown, this embodiment provides a method for rapidly generating machining programs for four-cylinder crankshafts, including: S1: Develop a four-cylinder crankshaft machining program application software, which includes a shape parameter setting module, a machining parameter setting module, a roundness parameter setting module, a compensation parameter setting module, and a main program setting module; Specifically, a four-cylinder crankshaft machining program application software was developed. This software is used for the rapid generation of machining programs for four-cylinder crankshafts. The application software includes modules for setting external shape parameters, machining parameters, roundness parameters, compensation parameters, and a main program setting module. The external shape parameter setting module is used to input the crankshaft's external shape parameters and generate an external shape parameter subroutine for quickly generating the crankshaft's 3D model. The software interface of the machining parameter setting module is as follows: Figure 2 As shown, this module is used to input machine tool machining parameters and generate corresponding machining parameter subroutines based on the input parameters; the roundness parameter setting module is used to input the roundness parameters of multiple connecting rod journals of the crankshaft and generate roundness parameter subroutines, which are used to control the roundness of the connecting rod journals during machining; the software interface of the compensation parameter setting module is shown in the figure. Figure 3 As shown, the compensation parameter setting module allows input of machining compensation parameters, shape compensation parameters, and roundness compensation parameters, and generates corresponding parameter compensation subroutines. These subroutines are used to compensate for the relevant parameters during machining to ensure that the machined crankshaft workpiece meets workpiece standards. The software interface of the main program setting module is shown below. Figure 4 As shown, by adding the parameter subroutines and parameter compensation subroutines generated above into the main program, the corresponding workpiece machining program can be generated.

[0025] S2: Input the workpiece shape parameters through the shape parameter setting module and generate a shape parameter subroutine; In this step, the shape parameter subroutine is used to generate a three-dimensional model of the four-cylinder crankshaft; The input workpiece shape parameters include: diameter parameters, length parameters, and position parameters of each part of the crankshaft, such as the connecting rod journal, main journal, balance disc, and signal disc.

[0026] When the workpiece shape parameters are input, the diameter, length and position parameters of each part of the crankshaft, such as the connecting rod journal, main journal, balance disc and signal disc, are replaced by variables, and the parameters are transformed into specific values.

[0027] Specifically, the diameter, length, and position parameters of the crankshaft connecting rod journal, main journal, balance disc, and signal disc can be set individually to generate the crankshaft's external shape parameters. Figure 5 The diagram shows the external parameters of a four-cylinder crankshaft. The positions of various parts of the crankshaft are defined by the distance parameters d1-d4 and D1-D4. The parameters d0r-d5r and d0r3 are the diameters of each shaft, d1l-d4l are the widths of each shaft section, D1R-D4R are the diameters of each connecting rod journal, D1L-D4L are the widths of each connecting rod journal, r1-r6 are the chamfers at the shaft connections, R1-R4 are the chamfers of each connecting rod journal, and C1 and C2 represent the chamfers at both ends of the crankshaft.

[0028] In the specific implementation process, the dimensional and positional parameters of each part of the crankshaft are replaced by variables; the diameter, length, and positioning parameters of each part of the crankshaft, including the main journal, connecting rod journal, balance disc, and signal disc, are all replaced by variables, and when parameters are input, they are changed from parameters to specific values.

[0029] Preferably, before performing step S3, the method further includes: calculating the machine tool turning parameters based on the dimensions of the cutter head, blank, machined part, and machine tool, and determining the coordinate points for machining.

[0030] S3: Input the workpiece machining parameters through the machining parameter setting module and generate a machining parameter subroutine; In this step, the input machining parameters include the process parameters for the corresponding machining parts of the connecting rod journal, spindle journal, balance disc, and signal disc. These process parameters include: offset values ​​X, Z, CH, U, W, CG, cutter head diameter, rough milling journal R0, finish milling journal F0, electric spindle SP1 speed, electric spindle SP2 speed, feed rate C, approach angle, approach distance, starting angle, and ending angle.

[0031] In the specific implementation process, the turning parameters are calculated based on the dimensions of the cutter head, blank, machined part, and machine tool, and the coordinate points for machining are determined. The process parameters for the corresponding machining parts of the connecting rod journal, spindle journal, balance disc, and signal disc can be set individually without any order. These parameters include offset values ​​X, Z, CH, U, W, and CG, cutter head diameter, rough milling journal R0, finish milling journal F0, SP1 speed, SP2 speed, C feed rate, approach angle, approach distance, starting angle, and ending angle.

[0032] S4: Input the roundness parameters of the connecting rod neck through the roundness parameter setting module, and generate a roundness parameter subroutine; In this step, the input connecting rod neck roundness parameters include the roundness parameters of each connecting rod neck cut surface divided into eight equally spaced circular arc cylindrical surfaces.

[0033] In specific real-time processes, such as Figure 6 As shown, each connecting rod neck is divided into eight segments of cylindrical arc (segments 1-8 in the figure). Each segment of the arc corresponds to a roundness parameter. By controlling the shape accuracy of each segment of the arc during processing, the overall arc accuracy is achieved.

[0034] S5: The shape parameter subroutine, the machining parameter subroutine, and the roundness parameter subroutine are added to the main program through the main program setting module to generate the workpiece machining program for the first time, and the workpiece is machined based on the first generated workpiece machining program; S6: Measure the workpiece shape data after processing, calculate the error value between the workpiece shape data and the crankshaft set shape data, and determine whether the error value meets the set error range. If yes, proceed to step S9; otherwise, proceed to step S7. In this step, the workpiece's external shape data after processing is measured, the error value between the workpiece's external shape data and the crankshaft's set external shape data is calculated, and it is determined whether the error value meets the set error range, including: The actual workpiece after processing is measured to obtain its shape and position parameters. The measured shape and position parameters are compared with the preset dimensions and position parameters to obtain the dimensional and position error values ​​of each part of the workpiece. The corresponding error values ​​are used to determine whether the set shape error range is met.

[0035] Specifically, the inspection and measurement results generated in the post-processing inspection step can be used to determine whether the workpiece is qualified after processing, and the measurement output results can be used to generate the parameter settings for the shape and compensation steps. In the specific implementation process, the shape and position parameters of the actual workpiece obtained after processing are compared with the preset dimensions and position parameters. For workpiece parts with errors exceeding the tolerance, the shape parameter compensation values ​​are re-entered for further correction and processing.

[0036] S7: Input the corresponding shape compensation parameters, machining compensation parameters and roundness compensation parameters through the compensation parameter setting module, and generate the corresponding compensation parameter subroutine; In this step, the compensation parameter setting module includes a shape compensation parameter submodule, a machining compensation parameter submodule, and a roundness compensation parameter submodule; For workpiece parts whose error values ​​exceed the set error range, the corresponding shape compensation parameters, machining compensation parameters, and roundness compensation parameters are input through the shape compensation parameter submodule, machining compensation parameter submodule, and roundness compensation parameter submodule, respectively, and shape compensation parameter subroutines, machining compensation parameter subroutines, and roundness compensation parameter subroutines are generated respectively.

[0037] Optionally, the shape and compensation parameter steps can correspond to the output compensation parameters of the shape parameter generation step, the machining parameter generation step, and the roundness parameter generation step, respectively, or a single step can be created to complete the establishment of compensation parameters.

[0038] S8: Add the compensation parameter subroutine to the main program through the main program setting module, and generate the workpiece processing program again to perform parameter compensation processing on the workpiece. After processing the workpiece, return to step S6. S9: Use the current workpiece machining program as the final machining program to generate the four-cylinder crankshaft machining program.

[0039] This method is based on the established four-cylinder crankshaft machining program application software. First, the workpiece shape parameters are input, then the workpiece machining parameters are input, and finally the workpiece roundness parameters are input. After completing the above three steps of parameter input, the machining program is generated for the first time. After the workpiece is machined for the first time, the acquired machining data is compared with the preset value of the workpiece shape error. According to the judgment step, it is determined whether the workpiece machining program is completed. If the preset requirements are met, the workpiece machining program is generated. If not, the workpiece shape compensation parameters, machining compensation parameters, and roundness compensation parameters need to be input. After inputting the compensation parameters and completing the machining, the process returns to the judgment step. After the judgment, if the preset value is met, the workpiece machining step is completed. Otherwise, the compensation parameters are input repeatedly until the preset requirements are met. Example 2

[0040] This embodiment provides a method for quickly adjusting a machining program for a four-cylinder crankshaft, used to adjust the machining program generated by the method in Embodiment 1, including: When the external dimensions of the crankshaft being machined change, obtain the external parameters corresponding to the parts of the crankshaft whose dimensions have changed compared to the previous crankshaft being machined; The original shape parameter subroutine is modified by the shape parameter setting module, the workpiece shape parameters corresponding to the part whose size has changed are input, and the shape parameter subroutine is saved. The original processing parameter subroutine is modified through the processing parameter setting module, the workpiece processing parameters corresponding to the part whose size has changed are input, and the processing parameter subroutine is saved. The original roundness parameter subroutine is modified by the roundness parameter setting module. The roundness parameters of the connecting rod neck corresponding to the changed size are input and the roundness parameter subroutine is saved. The modified shape parameter subroutine, machining parameter subroutine, and roundness parameter subroutine are added to the main program through the main program setting module, and the crankshaft machining program is regenerated.

[0041] Specifically, when the external dimensions of the crankshaft being machined change, the corresponding data in the external dimension parameters that have changed can be directly modified; the machining parameters only need to be modified for the parts where the dimensions have changed; the workpiece roundness parameters only need to be modified for the parts where the dimensions have changed; after modifying the above three steps, the crankshaft machining program can be regenerated.

[0042] Based on the above, the rapid generation and adjustment method for four-cylinder crankshaft machining programs of the present invention can shorten the time for three-dimensional modeling, machining parameter setting, and workpiece roundness parameter setting. It can quickly generate and modify crankshaft machining programs. Applying the present invention can improve the accuracy, efficiency, and automation level of crankshaft machining, ensuring that the machined crankshaft can meet the high-performance requirements of modern engines.

[0043] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A method for rapidly generating machining programs for four-cylinder crankshafts, characterized in that, include: S1: Develop a four-cylinder crankshaft machining program application software, which includes a shape parameter setting module, a machining parameter setting module, a roundness parameter setting module, a compensation parameter setting module, and a main program setting module; S2: Input the workpiece shape parameters through the shape parameter setting module and generate a shape parameter subroutine; S3: Input the workpiece machining parameters through the machining parameter setting module and generate a machining parameter subroutine; S4: Input the roundness parameters of the connecting rod neck through the roundness parameter setting module, and generate a roundness parameter subroutine; S5: The shape parameter subroutine, the machining parameter subroutine, and the roundness parameter subroutine are added to the main program through the main program setting module to generate the workpiece machining program for the first time, and the workpiece is machined based on the first generated workpiece machining program; S6: Measure the workpiece shape data after processing, calculate the error value between the workpiece shape data and the crankshaft set shape data, and determine whether the error value meets the set error range. If yes, proceed to step S9; otherwise, proceed to step S7. S7: Input the corresponding shape compensation parameters, machining compensation parameters and roundness compensation parameters through the compensation parameter setting module, and generate the corresponding compensation parameter subroutine; S8: Add the compensation parameter subroutine to the main program through the main program setting module, and generate the workpiece processing program again to perform parameter compensation processing on the workpiece. After processing the workpiece, return to step S6. S9: Use the current workpiece machining program as the final machining program to generate the four-cylinder crankshaft machining program.

2. The method according to claim 1, characterized in that, In step S2, the shape parameter subroutine is used to generate a three-dimensional model of the four-cylinder crankshaft; The input workpiece shape parameters include: diameter parameters, length parameters, and position parameters of each part of the crankshaft, such as the connecting rod journal, main journal, balance disc, and signal disc.

3. The method according to claim 2, characterized in that, In step S2, when the workpiece shape parameters are input, the diameter, length and position parameters of each part of the crankshaft, such as the connecting rod journal, main journal, balance disc and signal disc, are replaced by variables, and the parameters are transformed into specific values.

4. The method according to claim 1, characterized in that, Before performing step S3, the process also includes: calculating the machine tool turning parameters based on the dimensions of the cutter head, blank, machined part, and machine tool, and determining the coordinate points for machining.

5. The method according to claim 4, characterized in that, In step S3, the input machining parameters include the process parameters of the corresponding machining parts of the connecting rod journal, main journal, balance disc, and signal disc.

6. The method according to claim 5, characterized in that, The process parameters include: offset value X, offset value Z, offset value CH, offset value U, offset value W, offset value CG, cutter head diameter, rough milling journal R0, finish milling journal F0, electric spindle SP1 speed, electric spindle SP2 speed, C feed speed, cutting angle, cutting distance, starting angle, and ending angle.

7. The method according to claim 1, characterized in that, In step S4, the input connecting rod neck roundness parameters include the roundness parameters of each connecting rod neck cut surface divided into eight equally spaced circular arc cylindrical surfaces.

8. The method according to claim 1, characterized in that, In step S6, the workpiece shape data after machining is measured, the error value between the workpiece shape data and the crankshaft set shape data is calculated, and it is determined whether the error value meets the set error range, including: The actual workpiece after processing is measured to obtain its shape and position parameters. The measured shape and position parameters are compared with the preset dimensions and position parameters to obtain the dimensional and position error values ​​of each part of the workpiece. The corresponding error values ​​are used to determine whether the set shape error range is met.

9. The method according to claim 1, characterized in that, In step S7, the compensation parameter setting module includes a shape compensation parameter submodule, a machining compensation parameter submodule, and a roundness compensation parameter submodule; For workpiece parts whose error values ​​exceed the set error range, the corresponding shape compensation parameters, machining compensation parameters, and roundness compensation parameters are input through the shape compensation parameter submodule, machining compensation parameter submodule, and roundness compensation parameter submodule, respectively, and shape compensation parameter subroutines, machining compensation parameter subroutines, and roundness compensation parameter subroutines are generated respectively.

10. A method for rapidly adjusting a machining program for a four-cylinder crankshaft, used to adjust a machining program generated by the method according to any one of claims 1-9, characterized in that, include: When the external dimensions of the crankshaft being machined change, obtain the external parameters corresponding to the parts of the crankshaft whose dimensions have changed compared to the previous crankshaft being machined; The original shape parameter subroutine is modified by the shape parameter setting module, the workpiece shape parameters corresponding to the part whose size has changed are input, and the shape parameter subroutine is saved. The original processing parameter subroutine is modified through the processing parameter setting module, the workpiece processing parameters corresponding to the part whose size has changed are input, and the processing parameter subroutine is saved. The original roundness parameter subroutine is modified by the roundness parameter setting module. The roundness parameters of the connecting rod neck corresponding to the changed size are input and the roundness parameter subroutine is saved. The modified shape parameter subroutine, machining parameter subroutine, and roundness parameter subroutine are added to the main program through the main program setting module, and the crankshaft machining program is regenerated.

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