Display device and display method

Abstract

The present invention aims to display a machining program and machining trajectory simultaneously in a manner that allows immediate understanding of the correspondence between a specific portion of the machining program and a specific position on the machining trajectory. Acquired tool position data is stored in association with a machining program character string. A portion of the displayed tool machining trajectory of interest is selected, and a program block consisting of a machining program character string associated with the selected portion of the machining trajectory is selected and displayed on the displayed machining program. This facilitates understanding of the relationship between the tool movement and the machining program.

Description

Technical Field

[0001] The present invention relates to a display device and a display method for displaying a machining program and a machining trajectory in association with each other in a machining machine such as a machine tool. Background Art

[0002] In machine tools, when machining defects occur in workpieces after cutting or grinding, it is difficult to determine where in the machining program the defect occurred. This is especially true for machining programs composed of minute segments, making it difficult to pinpoint the location in the program where the defect occurred.

[0003] In order to solve the above-mentioned problems, conventionally, there is known a technique for displaying the relationship between a machining program, a machining position, and a machining status.

[0004] In Patent Document 1, during simulation of a tool machining path, a machining program is displayed in correspondence with the machining path, the simulation of the machining path is temporarily stopped, and program steps of the machining program are named, thereby enabling efficient editing and updating of the program.

[0005] In Patent Document 2, in an NC device that uses an NC program to move a tool to perform predetermined processing on a workpiece, the NC program can be verified by displaying the tool movement generated by analyzing the NC program and the tool movement obtained by actually executing the NC program in an overlapping manner, thereby obtaining a correct program.

[0006] In patent document 3, even when the workpiece is rotated and the tool is moved in the horizontal and vertical directions at the same time, the workpiece rotation angle, the horizontal distance and the vertical distance between the workpiece rotation axis and the tool rotation axis in the graphic coordinates are calculated according to the program instruction values, and the relative processing path of the tool with respect to the workpiece is displayed on the graphic screen based on these calculated data, thereby making it possible to easily and accurately confirm the movement of the tool.

[0007] In Patent Document 4, the tool trajectory during machining, the magnitude and direction of the load are displayed simultaneously as vectors, and the magnitude and direction of the load on the tool path can be visually confirmed, thereby easily identifying the cause and location of the abnormal load.

[0008] Prior art literature

[0009] Patent Literature

[0010] Patent Document 1: Japanese Patent Application Laid-Open No. 3-58202

[0011] Patent Document 2: Japanese Patent Application Laid-Open No. 6-59717

[0012] Patent Document 3: Japanese Patent Application Laid-Open No. 8-194514

[0013] Patent Document 4: Japanese Patent Application Laid-Open No. 2014-126939 Summary of the Invention

[0014] Problems to be solved by the invention

[0015] While technologies are known for displaying the relationship between machining programs, machining positions, and machining status, these technologies do not clearly indicate which specific location on the machining trajectory is directly related to which part of the machining program, or vice versa. In order to quickly correct machining programs and resume production without sacrificing efficiency when machining defects occur, it is necessary to immediately understand the relationship between the machining program and the location on the machining trajectory.

[0016] Therefore, an object of the present invention is to display a machining program and a machining trajectory in a display device capable of simultaneously displaying the machining program and the machining trajectory in a manner that allows immediate understanding of the correspondence between a specific portion of the machining program and a specific position of the machining trajectory.

[0017] Solutions for solving problems

[0018] In order to solve the above-mentioned problems, the display device disclosed in the present invention comprises: a position data acquisition unit, which acquires the position data of the tool; a processing program acquisition unit, which acquires the processing program; an associated data storage unit, which stores the position data of the tool acquired by the position data acquisition unit and the character string of the processing program acquired by the processing program acquisition unit in a mutually associated state; a processing trajectory display unit, which calculates the processing trajectory of the tool based on the position data of the tool acquired by the position data acquisition unit and displays the processing trajectory of the tool; a processing trajectory selection unit, which is used to select a part of the processing trajectory from the processing trajectory of the tool displayed by the processing trajectory display unit; an associated part selection unit, which selects a program block consisting of the character string of the processing program, which is stored in the associated data storage unit in a state associated with the part of the processing trajectory selected by the processing trajectory selection unit; and a processing program display unit, which displays the program block selected by the associated part selection unit on the processing program being displayed in a manner distinguishable from other character strings.

[0019] Effects of the Invention

[0020] The display device disclosed herein displays the correspondence between specific parts of a machining program and specific positions of a machining trajectory in a manner that allows immediate understanding. Therefore, even in the event of machining defects, the machining program can be quickly corrected, allowing production to proceed without reducing machining efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a block diagram showing the configuration of a display device for a machine tool according to the present invention.

[0022] Figure 2 It is a figure which shows the workpiece|product to be processed by the machine tool of this invention.

[0023] Figure 3 This is a diagram showing the display of a machining trajectory of a tool on the display device of the present invention.

[0024] Figure 4 It is a diagram showing the display of a machining program on the display device of the present invention.

[0025] Figure 5 This is a diagram showing an example of the relationship between tool position data and a machining program.

[0026] Figure 6 This is a diagram showing another example of the relationship between tool position data and a machining program.

[0027] Figure 7 This is a diagram showing a flow of displaying a machining trajectory of a tool in association with a machining program. DETAILED DESCRIPTION

[0028] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0029] Figure 1 This block diagram illustrates the configuration of the display device for a machine tool disclosed herein. The machine tool control device 10 controls the operation of the machine tool and includes a control unit (CPU) 11, such as a microcomputer, a storage unit 12, such as a ROM and RAM, and a transceiver 13. The ROM of the storage unit 12 stores machining programs for providing operation commands to the machine tool, while the RAM of the storage unit 12 stores position data on the machine tool obtained through teaching.

[0030] The display device 20 displays a machining program of a machine tool and a machining trajectory of a tool of the machine tool, and includes a display data acquisition unit 21 , a storage unit 22 including ROM, RAM, etc., a data processing and display unit 23 , and a transmitting and receiving unit 24 .

[0031] The display data acquisition unit 21 is a part that acquires data for display from the machine tool control device 10 and the display device 20 , and includes a position data acquisition unit 211 , a machining program acquisition unit 212 , a machining trajectory selection unit 213 , and a program block selection unit 214 . The display device 20 also serves as a user interface.

[0032] The machine tool control device 10 transmits the position data of the machine tool's tool, i.e., position data related to the tool based on command values ​​in the machining program, to the position data acquisition unit 211 via the machine tool control device 10's transceiver unit 13 and the display device 20's transceiver unit 24. The tool position data is obtained by adding tool information such as the tool's diameter, length, and tip shape to the feed axis's position data. As described later, the tool position data acquired by the position data acquisition unit 211 is stored in association with the machining program's character string and index data and used to calculate the tool's machining trajectory.

[0033] The machine tool control device 10 transmits the data of the character string and index of the machining program to the machining program acquisition unit 212 via the transceiver unit 13 of the machine tool control device 10 and the transceiver unit 24 of the display device 20. In some machining programs, each program character string (program block) is assigned an index called an N number by the program user (machine user, machine manufacturer), while in some machining programs, each program character string (program block) is not assigned such an index. It is also known that the machine tool control device 10 automatically assigns an index (e.g., a program line number) to programs that have not been assigned an index by the user for ease of processing.

[0034] The machining trajectory selection unit 213 acquires data related to a specific portion selected on the displayed machining trajectory of the tool. To further explain, when a user selects a specific portion of the machining trajectory of the tool displayed in the machining trajectory display unit 232 (described later), the machining trajectory selection unit 213 acquires data for the selected portion of the machining trajectory of the tool and stores this data in the selected data storage unit 222 of the storage unit 22 (described later). As described later, the machining program character string (program block) corresponding to (associated with) the acquired and stored portion of the machining trajectory of the tool is found and displayed in the machining program display unit 233 of the data processing display unit 23.

[0035] In the program block selection unit 214, data related to a specific character string (program block) selected in the displayed machining program is acquired. To further explain, when a user selects a character string (program block) of interest in a machining program displayed in the machining program display unit 233 (described later), the data for the selected program block is acquired in the program block selection unit 214 and then stored in the selected data storage unit 222 of the storage unit 22 (described later). As described later, a portion of the machining trajectory of the tool corresponding to (associated with) the acquired and stored program block is found. This portion of the machining trajectory is then displayed in the machining trajectory display unit 232 of the data processing display unit 23.

[0036] The storage unit 22 includes storage devices such as ROM and RAM. The ROM and other storage devices store programs (applications) for drawing the tool's machining trajectory based on the tool's position data, as well as data related to the display method (design) on the display device 20. The RAM and other storage devices store various display data acquired by the display device 20. The storage unit 22 includes a related data storage unit 221 and a selected data storage unit 222.

[0037] In the associated data storage unit 221, the tool position data acquired in the position data acquisition unit 211 and the program block (the character string of the machining program itself or the index of the machining program) acquired by the machining program acquisition unit 212 are saved as mutually associated data by storing the data acquired simultaneously in each position data and program block as one data set.

[0038] The selected data storage unit 222 stores data related to a portion of the machining trajectory of the tool selected in the machining trajectory display unit 232 obtained in the machining trajectory selection unit 213, and data related to the program block selected in the machining program displayed in the machining program display unit 233 obtained in the program block selection unit 214.

[0039] The data processing and display unit 23 performs various calculations and data processing to generate final display data based on the various data acquired by the display data acquisition unit 21, and displays the generated data or displays the acquired data in its original form. Furthermore, since the user can select a desired portion of the tool's machining trajectory or machining program displayed on the data processing and display unit 23, the data processing and display unit 23 can be said to also function as a user interface. The data processing and display unit 23 includes a related portion selection unit 231, a machining trajectory display unit 232, and a machining program display unit 233.

[0040] The associated portion selecting unit 231 refers to the association between the tool position data and the machining program data stored in the associated data storage unit 221 to find a block of the machining program corresponding to the portion of the machining trajectory of the tool to which the user is interested, which was acquired by the machining trajectory selecting unit 213 and stored in the selected data storage unit 222. Furthermore, the associated portion selecting unit 231 refers to the association between the tool position data and the machining program data stored in the associated data storage unit 221 to find a portion of the machining trajectory of the tool corresponding to the block to which the user is interested, which was acquired by the block selecting unit 214 and stored in the selected data storage unit 222.

[0041] The machining trajectory display unit 232 displays the machining trajectory of the tool, calculated based on the tool position data acquired by the position data acquisition unit 211. A specific portion of the machining trajectory of the tool, identified (selected) by the associated portion selection unit 231, is displayed within the displayed entire (or large portion) machining trajectory, distinguishing it from other portions by coloring or other means. Furthermore, the user can use a pointer, for example, to select a desired portion of the machining trajectory of the tool displayed in the machining trajectory display unit 232. The selected data is then sent to the machining trajectory selection unit 213.

[0042] The machining program display unit 233 displays the entire machining program (or a large portion thereof) acquired by the machining program acquisition unit 212. Furthermore, a specific program block identified (selected) by the associated portion selection unit 231 is displayed within the displayed entire machining program (or a large portion thereof) by, for example, inverting the color to distinguish it from other portions. Furthermore, a user can use, for example, a cursor to select a desired program block within the machining program displayed in the machining program display unit 233. The selected data is then sent to the program block selection unit 214.

[0043] Next, as an embodiment, Figure 2 An example of a workpiece 30 of a machine tool is shown in FIG. Figure 3 The display of the machining trajectory of the tool in the display device 20 for the workpiece 30 is shown in FIG. Figure 4 , which shows the display of the processing program for the workpiece 30. Figure 3 In the display of the tool processing trajectory, the three-dimensional processing trajectory is displayed on the right, and the two-dimensional processing trajectory when viewed from the XY plane, XZ plane, and YZ plane is displayed on the left from top to bottom. Figure 4 In the display of the machining program, a portion of a specific size range in the machining program consisting of a character string is displayed.

[0044] Next, a method for storing the tool's machining trajectory in association with the machining program according to a machining program acquisition method will be described using an accompanying diagram showing the display of the tool's machining trajectory and the machining program on a display device. As described above, in a machining program, there are machining programs in which each program block is assigned an index called an N number by the program user (machine user, machine manufacturer), while there are machining programs in which each program block is not assigned this index. As a method for the display device to acquire the machining program, there are the following methods: acquiring data of the program string (program block) of the machining program from the machine tool control device 10 at each time point when the tool position data is sent; and acquiring the index of the machining program at each time point when the tool position data is sent, and acquiring the program string of the machining program independently of the index.

[0045] exist Figure 5 The following describes a data association method for acquiring a machining program by reading it together with the position data on the tool's machining trajectory. Specifically, a command position (position data) is received from the machine tool, along with the machining program character string (program block) at the acquired data point. The program character string is then associated with the position data on the tool's machining trajectory and stored sequentially. Ultimately, the entire machining program is acquired, and the tool's position data on the machining trajectory and the program blocks are stored in an associated state.

[0046] In contrast, in Figure 6 A method for acquiring a machining program by reading in the machining program independently of the position data on the machining path of the tool is described. In this method, a command position (position data) and an index of the machining program at the data point are received from the machine tool. The position data on the machining path of the tool are associated with the index of the machining program. The machining program containing the index is read in independently of the index, and the position data on the machining path of the tool is stored in an associated state with the corresponding program block using the index.

[0047] The method of acquiring a machining program by reading in the machining program together with the position data on the machining trajectory of the tool has the following problem: the character string of the machining program needs to be read in separately at each acquisition time point of the position data on the machining trajectory of the tool, so that the acquisition of the entire machining program data associated with the position data on the machining trajectory of the tool takes time. In contrast, in the method of acquiring a machining program by reading in the machining program and the position data on the machining trajectory of the tool independently, an index is read in at each acquisition time point of the position data on the machining trajectory of the tool, and the entire machining program can be read in separately. Therefore, the data obtained by associating the position data on the machining trajectory of the tool with the machining program can be quickly saved. In terms of the speed of reading and saving data, it can be said that the method using indexes is superior.

[0048] On the other hand, if the machining program is not indexed, the only method available is to read the machining program together with the position data on the machining trajectory of the tool. In other words, the method of reading the machining program together with the position data on the machining trajectory of the tool can also handle machining programs that are not indexed, and can be said to have higher versatility.

[0049] Next, use Figure 7 The flowchart of the present disclosure is used to illustrate the method of displaying the machining trajectory of the tool in association with the machining program. Figure 7As shown, first, the position data of the tool and the machining program are acquired from the machine tool control device (step St1), and the position data of the tool and the character string of the machining program are associated and stored (step St2).

[0050] As described above, sometimes the position data of the tool and the processing program (character string) are acquired at the same time, and sometimes the position data of the tool and the index of the processing program are acquired at the same time, and the processing program (character string) itself is acquired separately. In the case where the position data of the tool and the character string of the processing program are acquired at the same time, the position data of the tool at the time of acquisition is linked to the character string (program block) of the processing program and saved in association. In contrast, in the case where the processing program (character string) itself is acquired independently of the position data of the tool, the position data of the tool is associated with the processing program by saving the position data of the tool in association with the index of the processing program. That is, at the time when the position data of the tool and the processing program are acquired from the machine tool control device, the position data of the tool and the processing program are saved in association with each other.

[0051] Next, the tool machining trajectory is calculated based on the tool position data and displayed (step St3). The tool machining trajectory can be displayed in three dimensions, or in two dimensions when viewed from above, front, and side.

[0052] Next, for the purpose of displaying the associated part, it is determined whether the user a: wants to know the program block corresponding to a specific part of the tool's processing trajectory, that is, selects a part of the processing trajectory and displays the corresponding program block, or b: wants to know the specific part of the tool's processing trajectory corresponding to a specific program block, that is, selects the program block and displays the corresponding part of the processing trajectory (step St4).

[0053] When a portion of the machining trajectory is selected and the corresponding program block is displayed, that is, when a is selected in step St4, the process proceeds to step St5. In addition, when a program block is selected and a portion of the corresponding machining trajectory is displayed, that is, when b is selected in step St4, the process proceeds to step St8.

[0054] In step St5 , the user selects a portion of the machining trajectory of the tool being displayed. This is done via the display device (user interface) (for example, by tracing a predetermined range of the tool on the machining trajectory using a pointer or the like).

[0055] Then, a program block of the machining program associated with the selected portion of the machining trajectory is selected on the display device (step St6). The selected program block is then displayed on the machining program in a manner distinguishable from other character strings by, for example, inverting or coloring the corresponding character string (step St7). This allows the user to understand the program block corresponding to (associated with) the portion of the machining trajectory of the target tool, achieving the desired goal, and the process ends.

[0056] In step St8, the user selects a program block of interest on the displayed machining program. This is done by the user via the display device (user interface) (for example, by moving the cursor to highlight a predetermined area on the machining program).

[0057] Then, a portion of the tool's machining trajectory associated with the selected program block is selected on the display device (step St9). The selected portion of the tool's machining trajectory is then displayed in a manner distinguishable from other portions by coloring the corresponding portion on the tool's machining trajectory (step St10). Thus, the user can grasp the portion of the tool's machining trajectory corresponding to (associated with) the target program block, achieving the purpose, and the process ends.

[0058] The display device and display method disclosed herein make it easier to understand the relationship between the machine's axis movements, that is, the tool's movements, and the machining program. Consequently, if a machining defect occurs during operations such as cutting or grinding on a machine tool, it is easier to determine which part of the machining program caused the defect. Consequently, the display device and display method disclosed herein can be expected to improve operational efficiency.

[0059] As mentioned above, although the embodiment of the present invention has been described, the present invention is not limited to the embodiment and can be implemented in various forms without departing from the scope of the present invention.

[0060] Description of Reference Numerals

[0061] 10: Machine tool control device; 11: Control unit (CPU); 12: Storage unit (ROM, RAM); 13: Transmitting and receiving unit; 20: Display device; 21: Display data acquisition unit; 211: Position data acquisition unit; 212: Processing program acquisition unit; 213: Processing trajectory selection unit; 214: Program block selection unit; 22: Storage unit (ROM, RAM); 221: Associated data storage unit; 222: Selection data storage unit; 23: Data processing display unit (user interface); 231: Associated part selection unit; 232: Processing trajectory display unit; 233: Processing program display unit; 24: Transmitting and receiving unit; 30: Workpiece.

Claims

1. A display device comprising: a position data acquiring unit for acquiring position data of a tool; a processing program acquisition unit that acquires a processing program; a correlation data storage unit that stores the position data of the tool acquired by the position data acquisition unit and the character string of the machining program acquired by the machining program acquisition unit in a state of being correlated with each other; a machining trajectory display unit, which calculates a machining trajectory of the tool based on the position data of the tool acquired by the position data acquisition unit and displays the machining trajectory of the tool; a machining trajectory selection unit for selecting a portion of the machining trajectory from the machining trajectory of the tool displayed by the machining trajectory display unit; a related portion selecting unit that selects a program block consisting of a character string of a machining program stored in the related data storing unit in a state of being associated with a portion of the machining trajectory selected by the machining trajectory selecting unit; and a machining program display unit that displays the program block selected by the associated portion selection unit on the machining program being displayed in a manner distinguishable from other character strings; in, The machining program acquisition unit has a structure capable of selecting and adopting a method of acquiring the machining program itself together with the position data on the machining trajectory of the tool and a method of acquiring an index of the machining program together with the position data on the machining trajectory of the tool. When a method of acquiring the machining program itself together with the position data on the machining trajectory of the tool is selected and adopted, the machining program is acquired by sequentially acquiring a character string of the machining program at each time point when the position data acquiring unit acquires the position data of the tool. When a method of acquiring an index of a machining program together with position data on a machining trajectory of a tool is selected and adopted, the index of the machining program is acquired at each time point when the position data acquisition unit acquires the position data of the tool, and a character string of the machining program is acquired separately regardless of the time point when the position data acquisition unit acquires the position data of the tool.

2. The display device according to claim 1, wherein It also includes a program block selection unit for selecting a portion of program blocks of a machining program. The associated portion selecting unit selects a portion of the machining trajectory stored in the associated data storing unit in a state associated with the program block selected by the program block selecting unit, A portion of the machining trajectory selected by the associated portion selecting unit is displayed on the machining trajectory display unit in a manner distinguishable from other portions.

3. The display device according to claim 1 or 2, wherein: When the machining program acquiring unit acquires the machining program by sequentially acquiring a character string of the machining program at each time point when the position data acquiring unit acquires the position data of the tool, The associated data storage unit stores the position data acquired by the position data acquisition unit and the character string of the machining program acquired by the machining program acquisition unit in association with each other at each acquisition time point.

4. The display device according to claim 1 or 2, wherein: In the case where the machining program acquisition unit acquires an index of the machining program at each time point when the position data acquisition unit acquires the position data of the tool and separately acquires a character string of the machining program regardless of the time point when the position data acquisition unit acquires the position data of the tool, The associated data storage unit stores the position data acquired by the position data acquisition unit and the index of the machining program acquired by the machining program acquisition unit in association with each other at each acquisition time point.

5. A display method comprising the following steps: Get the tool position data; Obtain processing procedures; The acquired tool position data and the character string of the machining program are associated with each other and stored; Calculating a machining trajectory of the tool according to the acquired position data of the tool, and displaying the machining trajectory of the tool; Select a portion of the machining path of the displayed tool; selecting a program block consisting of a character string of a machining program associated with a portion of the machining trajectory selected by the machining trajectory selection unit; and The selected program block is displayed on the displayed machining program. Among them, in the step of obtaining the machining program, a method of obtaining the machining program itself together with the position data on the machining trajectory of the tool and a method of obtaining the index of the machining program together with the position data on the machining trajectory of the tool can be selected and adopted. When a method of acquiring the machining program itself together with the position data on the machining trajectory of the tool is selected and adopted, the machining program is acquired by sequentially acquiring the character string of the machining program at each time point when the position data of the tool is acquired. When a method of acquiring the index of the machining program together with the position data on the machining trajectory of the tool is selected and adopted, the index of the machining program is acquired at each time point when the position data of the tool is acquired, and the character string of the machining program is acquired separately regardless of the time point when the position data of the tool is acquired.

6. The display method according to claim 5, further comprising the following steps: Select a part of the program block in the machining program; selecting a portion of a machining trajectory of a tool associated with the selected program block; and A portion of the machining trajectory of the selected tool is displayed on the machining trajectory being displayed.

7. The display method according to claim 5 or 6, wherein: In the step of acquiring the machining program, when the machining program is acquired by sequentially acquiring the character string of the machining program at each time point of acquiring the position data of the tool, In the step of storing the data in association, the acquired position data of the tool and the character string of the machining program are stored in association with each other at each acquisition time point.

8. The display method according to claim 5 or 6, wherein: In the step of acquiring the machining program, the index of the machining program is acquired at each time point of acquiring the position data of the tool, and the character string of the machining program is acquired independently of the time point of acquiring the position data of the tool. In the step of storing the data in association, the acquired position data of the tool and the index of the machining program are stored in association with each other at each acquisition time point.

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