KR100898034B1 - Method for regulating a path of an instrument - Google Patents

Abstract

The present invention relates to a method for modifying a tool path through a numerically controlled machining simulation, and an object of the present invention is to use in numerically controlled machining using information collected through numerically controlled machining simulation using original numerical control data. It is to provide a tool path correction method for modifying the path of the tool to be. To this end, the present invention, in the tool path correction method applied to the tool path correction device, the step of the tool path correction device receives the original numerical control data and at least one material shape information, the original numerical control data and the selected material shape Performing the numerically controlled machining simulation by the tool path correction apparatus using the information, and using the result information of the numerically controlled machining simulation, the tool path correction apparatus uses the final numerical value for which the tool path is corrected from the original numerical control data. Generating control data.

Numerical Control (NC), Tool Path, Hollow Section, Delete

Description

How to edit toolpaths {METHOD FOR REGULATING A PATH OF AN INSTRUMENT}

1 is an exemplary view showing a method of controlling a moving speed of a tool through a conventional numerical control machining simulation.

2 is an exemplary view showing a tool path of an air gap represented by a conventional numerically controlled machining simulation.

Figure 3 is an embodiment configuration of a numerical control machining system to which the present invention is applied.

Figure 4 is a flow diagram of one embodiment of a tool path correction method according to the present invention.

Figure 5 is an exemplary view showing a state in which the tool path is modified by the tool path correction method according to the present invention.

Figure 6 is an exemplary view showing a state in which the tool path is deleted in the empty section in the simulation by the tool path correction method according to the present invention.

<Description of Major Symbols in Drawing>

100: tool 200: material

The present invention relates to a method for modifying a path of a tool applied to a numerically controlled machine tool, and more particularly, to a method for correcting a tool path through numerically controlled machining simulation.

The numerical control (NC) (hereinafter simply referred to as 'NC') refers to controlling the operation of a device by numerical information. The numerical information is converted into a command pulse train for a servo mechanism. The device for processing materials is called NC machine tool. The general NC machine tools currently in use use microprocessors.

Such NC machine tools generally perform NC milling. NC milling is a process of removing a material while moving a rotating cutting tool at an input tool path and speed to create a three-dimensional machined surface, hereinafter simply referred to as NC machining.

Meanwhile, in order for NC machine tools to perform NC milling on an object, NC data including a moving path, a moving speed, and a rotational speed of a tool must be transmitted to the NC machine tool, and a microprocessor mounted on the NC machine tool The NC data is used to control the tool.

That is, in order for a single material to be processed by an NC machine tool to be a product, an NC data generation process and an NC machining process using NC data should be performed.

The NC data generation process is a process for generating NC data, and is generally performed through a computer aided manufacturing (CAM) process (hereinafter, simply referred to as CAM). That is, information about computer aided design (CAD) (hereinafter simply referred to as 'CAD') of the three-dimensional shape to be processed and information about the machining conditions and the processing order of the tool to be used in the NC machine tool are displayed. When input to a computer equipped with a function, the computer analyzes the information to generate NC data.

As described above, the NC machining process is a process in which an NC machine tool substantially processes materials using NC data, and the NC machine tool on which NC data is mounted controls a drive of tools by a microprocessor.

However, since the NC data generated by the NC data generation process is simply numerically calculated information, when the NC data is directly transmitted to the NC machine tool to perform the NC machining process, unnecessary machining process or load on the tool is performed. The NC machining process will not be performed smoothly. In other words, NC data is simply data based on the three-dimensional information of the material created by CAD, and the movement path and the moving speed of the tool are set using CAM, and the actual shape of the material before processing is not considered. Therefore, the following problems may occur.

First, when the tool processes the material based on the NC data, the moving speed of the tool cannot be controlled because the NC data does not consider information about the amount of material that the tool should actually process. The problem arises that a load can be generated on the tool.

Second, since the NC data does not consider the shape of the material that the tool is actually required to process, machining on a path that does not require machining (hereinafter simply referred to as the `` tool section tool path '') can be performed. This causes a problem that the machining time may be delayed.

On the other hand, in order to solve the above problems, recently developed programs that can perform NC machining simulation (hereinafter, simply referred to as 'NC machining simulation') using NC data on a terminal such as a computer. It is becoming.

1 is an exemplary view showing a method of controlling a moving speed of a tool through a conventional numerical control machining simulation. In addition, Figure 2 is an exemplary view showing a tool path of the air gap represented by a conventional numerical control machining simulation.

That is, the conventional NC machining simulation is to perform the NC machining simulation using the original NC data, through which the user can modify the NC data, thereby obtaining the final NC data that can actually be used in the NC machining process.

For example, in the conventional NC machining simulation, when the shape information about the workpiece 200 and the information on the tool 100 are input, the volume of the tool passing along the tool path of the NC data in the workpiece 200 passes through. By performing a simulation to calculate, and outputting the position information such that the tool 100 and the workpiece 200 is in contact with each tool path, the user is each of the angle considering the workpiece 200 using the volume information and position information The final NC data to which the moving speed of the tool 100 is added in the tool path is output through the CAM.

Conventional NC machining simulation as described above is notified in advance when a collision occurs between the tool 100 and the material 200, and adjusts the moving speed to shorten the machining time and performs a function of preventing the breakage of the tool.

However, the conventional NC machining simulation as described above performs only a function of notifying that a collision occurs between the tool 100 and the workpiece 200. If there is wrong data, the user may manually edit the NC data or The inconvenience of having to generate final NC data again in CAM.

That is, when using the conventional NC machining simulation as described above, the user has to edit the original NC data manually or to perform the NC data generation process again to generate the final NC data.

In addition, the conventional NC machining simulation as described above provides only the first problem as described above, that is, only the information on the correction of the moving speed of the tool, and the problem of performing the machining on the tool path of the air gap. There is a problem in that no solution is provided. That is, although each tool has an optimum machining depth, movement speed, and movement path, the conventional NC machining simulation merely adjusts the movement speed, as shown in FIG. 1, and the air as shown in FIG. 2. There is still a problem in that unnecessary time is wasted by not deleting the empty tool path A passing through the section B.

In other words, the conventional NC machining simulation has a problem in that only the moving speed of the tool is adjusted while maintaining the tool path in the changing machining situation.

An object of the present invention for solving the above problems, by using the information collected through the numerical control machining simulation using the original numerical control data, to modify the tool path used for numerical control machining, tool path correction To provide a way.

The present invention for achieving the above object, in the tool path correction method applied to the tool path correction device, the step of the tool path correction device receives the original numerical control data and at least one material shape information, the original numerical control data And performing the numerically controlled machining simulation by the tool path correction apparatus using the selected material shape information, and by using the result information of the numerically controlled machining simulation, the tool path correction apparatus determines that the tool path is determined from the original numerical control data. Generating the modified final numerical control data.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

3 is a configuration diagram of one embodiment of a numerically controlled machining system to which the present invention is applied.

As shown in the figure, a numerically controlled machining system to which the present invention is applied can generate original NC data containing information on a three-dimensional structure of a product's shape and a moving path of a tool for processing the same by using CAD and CAM. NC data generating device 10, the original NC data generated by the NC data generating device and the data on the shape of the virtual material and the data on the shape and properties of the tool is input, using the NC data A tool path correction device for generating a final NC data in which the path of the tool is modified using the information collected through the simulation while performing a simulation of processing the virtual material into the shape of the product in a virtual space. 20 and NC machining of the actual material using the final NC data generated by the tool path correction device. It is configured to include the NC machine tool 30 for carrying.

The NC data generating apparatus 10 is for performing an NC data generating process, and a personal computer (PC), which is a terminal on which a central control unit (CPU) is mounted, may be used. CAD design the shape of the product using a computer, the user can design by directly checking the drawings of the product from various angles through the output unit (monitor) of the NC data generation device 10. Meanwhile, the CAM generates work instruction information (original NC data) for a tool of a NC machine tool for processing a material into the shape of the product based on the shape information of the product designed through CAD. That is, CAD and CAM are programs installed and operated in the NC data generating apparatus 10. The NC data generating apparatus 10 generates information on the shape of a product using a CAD program, and generates a CAM program. The original NC data can be generated to control the tool of the NC machine tool.

The tool path correction device 20 is a device for generating final NC data by processing the original NC data generated by the NC data generation device, such as a personal computer (PC) like the NC data generation device 10. Can be used. In particular, the tool path correction device 20 may be the same terminal as the NC data generation device 10. In order to generate final NC data, first, the tool path correction apparatus 20 receives the original NC data, information on the shape of the virtual material, and information on the shape and properties of the tool, and uses the NC data. The simulation is performed to process the virtual material into a desired shape in a virtual space. The tool path correction device 20 includes an input unit, a controller, a storage unit, and an output unit for the simulation. Meanwhile, the tool path correction apparatus 20 generates final NC data in which the tool path is corrected by using information obtained from a simulation result, that is, whether or not a material exists on the coordinates of the tool path.

The NC machine tool 30 is for performing an NC machining process, and the machining is substantially performed using the final NC data. To this end, the NC machine tool 30 includes a control unit configured as a microprocessor, an input unit, a storage unit, and various tools driven by the control unit. That is, the controller controls the operation of the various tools by using the final NC data.

Figure 4 is a flow diagram of an embodiment of a tool path correction method according to the present invention. In addition, Figure 5 is an exemplary view showing a state in which the tool path is modified by the tool path correction method according to the present invention, Figure 6 is a tool path is deleted in the simulation through the tool path correction method according to the present invention. One example showing the state.

As described above, according to the present invention, the tool path correction device 20 performs simulation using the original NC data generated by the NC data generating device 10, while using the simulation result to determine the original NC data. As a method for modifying a tool path, the final NC data of which the tool path is corrected is mounted on the NC machine tool 30 to be used as control data for substantially machining the material.

The tool path correction method according to the present invention, in particular, deletes the air path tool path A formed in the air gap B of the material 200. As shown in FIG. When the empty section B in which the material 200 does not exist is generated, the tool section A of the tool section 100 moving the empty section is deleted, while the tool is immediately moved to a position requiring another machining. It is about how to move.

For example, according to the original NC data generated from the NC data generating device 10, even in the air gap B in which no material exists, as shown in FIG. 5, the air gap tool path A is formed. Therefore, the NC machine tool must perform an unnecessary process of moving the tool through the tool path A in the air gap B even in the air gap B, but the tool path correction device 20 performs a simulation result in the air gap B. If present, the tool path A of the air gap B is deleted as shown in FIG. 5 and the tool is moved to another path C so that the NC machine tool does not perform an unnecessary process. can do.

That is, since there are no workpieces 200 in the air gap B, there is no object to be processed while the tool 100 moves, so that the tool path correcting device 20 performs the air gap in the original NC data. The tool path A formed in the air gap at (B) is deleted.

In other words, if the product is simply processed using the original NC data generated through CAD and CAM, most of the air gaps from 5% to as much as 30% occur. Therefore, the tool path correction method according to the present invention, as shown in FIG. 5, deletes the tool path A formed in the air gap B and leaves only the tool path for substantially processing the material 200. Thus, the working time of the NC machine tool can be shortened.

To this end, the tool path correction apparatus 20 performs the following process.

First, the tool path correction apparatus 20 receives and stores original NC data generated from the NC data generating apparatus 10 (302). The original NC data is input through an input unit of the tool path correction device 20 or through an interface connected to the NC data generation device and stored in the storage unit of the tool path correction device 20. In addition, when the tool path correction device 20 and the NC data generation device 10 are configured as one terminal, the original NC data may be immediately stored in the storage unit of the tool path correction device.

Tool path correction device 20 receives and stores the shape information of the material to be processed by the original NC data (304). The material shape information is information on a shape of a material to be substantially processed through the NC machine tool 30. The material shape information is also generated by CAD or CAM. Therefore, the material shape information is also stored in the storage unit of the tool path correction apparatus 20 through the same method as the original NC data. On the other hand, since the shape of the material to be processed may vary, at least one material shape information may be stored in the storage unit.

The tool path correction apparatus 20 receives selection information about the shape of the workpiece to be processed through the input unit, and extracts the selected workpiece shape information from the storage unit (306). That is, as described above, since the shape of the material to be machined is varied and the material shape information is stored accordingly, the user can select material shape information that substantially matches the shape of the material to be used at the time of processing, and modify the tool path. The device extracts selected material shape information from the storage.

 Tool path correction device 20 performs the NC machining simulation using the original NC data and the material shape information (308). That is, the tool path correction apparatus performs a simulation of machining the workpiece using the original NC data based on the shape of the workpiece according to the workpiece shape information.

The tool path correction apparatus 20 compares the coordinates of the tool path of the original NC data with the coordinates of the material shape included in the material shape information, and determines whether a material exists on the coordinates of the tool path ( 310). That is, as shown in Figure 5, the tool path (A) is set on the original NC data, each point on the tool path (A) may be represented by one X, Y, Z coordinates. In addition, the outer surface of the material may also be represented by one X, Y, Z coordinates of each point, the material shape information includes coordinate information for each point of the outer surface of the material. Therefore, the tool path correcting device 20 analyzes the coordinates of each point of the original toolpath and the coordinate information of each point of the outer surface of the workpiece, so that the tool having no blank exists on the coordinates of the original toolpath. It is determined whether the path A exists.

The tool path correction apparatus 20 maintains the original tool path when the material exists on the coordinates of the original tool path as a result of the determination (312). The portion where the original tool path is maintained as is is referred to as an unmodified tool path below.

If the tool path correction device 20 has a tool path for which no blank exists in the coordinates of the original tool path as a result of the determination, as shown in FIG. 6, the coordinates of the respective points forming the tool path for the tool gap are shown. Extract the air gap tool path passing through the coordinates from the original NC data (314).

Tool path correction device 20, from the original NC data, the coordinate information of the remaining tool path after the empty section tool path is deleted, and the coordinate information of the uncorrected tool path of the portion adjacent to the empty section tool path To generate the final NC data by generating a connection tool path (C) that can connect the remaining tool path and the unmodified tool path, as shown in FIG. That is, the tool path correction device 20 does not modify the data for the uncorrected tool path from the original NC data, deletes the tool path of the hollow section, and generates a new tool path C. To generate the final NC data.

The generated final NC data is mounted on the NC machine tool 30 and used as control data for substantially driving the tool.

According to the tool path correction method according to the present invention as described above, the tool path (A) through the air gap (B) is deleted, the machining time can be shortened. That is, in the related art, a method of accelerating only the moving speed of a tool while maintaining the tool path of the air gap is used. However, in the present invention, unnecessary tool movement is eliminated by deleting the tool path A itself passing through the air gap B. Can be reduced.

As described above, the present invention can reduce the NC machining time by deleting the tool path through which the tool is unnecessarily moved during NC machining through NC machining simulation and leaving only the tool path for substantially machining the workpiece. That has an excellent effect.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (4)

In the tool path correction method applied to the tool path correction device, Receiving, by the tool path correction device, original numerical control data and at least one piece of material shape information; Performing numerical control machining simulation by the tool path correction apparatus using original numerical control data and selected workpiece shape information; And And generating, by the tool path correction device, final numerical control data in which the tool path is modified from the original numerical control data by using the result information of the numerical control machining simulation. Generating the final numerical control data, Determining, by the tool path correcting device, whether an empty section tool path exists in the original tool path using the result information of the numerically controlled machining simulation; If the empty path tool path does not exist in the original tool path, the tool path correcting device designating the original tool path as an uncorrected tool path; If the empty path tool path exists in the original tool path as a result of the determination, the tool path correcting device deleting the empty tool path from the original tool path and maintaining only the remaining tool path; And And generating, by the tool path correction device, final numerical control data consisting of the uncorrected tool path and the remaining tool path. The method of claim 1, The material shape information, the tool path correction method, characterized in that it comprises information about the shape of the material to be actually processed. delete The method of claim 1, And the final numerical control data includes a connection tool path capable of connecting the remaining tool path and the unmodified tool path.

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