JP4286940B2 - NC machining program creation method and apparatus for machine tools - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a turning center capable of rotating a workpiece and processing it with a turning tool on a workpiece held by a chuck at the tip of a spindle, and performing processing with a rotating tool that rotates the tool itself. The present invention relates to a method and apparatus for creating an NC machining program for a machine tool.
[0002]
[Prior art]
Machine tools such as turning centers that can work with a turning tool by rotating the work on the work gripped by the chuck at the tip of the spindle and with a rotating tool that rotates the tool itself Is known. FIG. 1 is a perspective view showing an example of a turning center.
[0003]
On the upper surface of the bed 1, two Z-axis guide members 2 are provided in the Z-axis direction parallel to the axial direction of a main shaft 19 described later. Here, the Z-axis guide member 2 is disposed in a horizontal plane parallel to the floor on which the machine tool is installed. On the Z-axis guide member 2, a carriage 3 is placed so as to be movable in the Z-axis direction. The movement of the carriage 3 in the Z-axis direction is driven by a Z-axis motor 26. A Y-axis feed base 7 is provided on the carriage 3 so as to be movable in the Y-axis direction, which is a direction orthogonal to the Z-axis line. Here, the Y-axis direction is also arranged in the horizontal plane.
[0004]
A tool post body 11 is provided on the Y-axis feed base 7 so as to be movable in the X-axis direction (vertical direction). A turret 16 in which a plurality of tools are arranged on the circumference is provided on the tool post body 11. The turret 16 performs indexing rotation and positions a necessary tool at the machining position. An automatic tool changer 30 is provided on the Y-axis feed base 7. Further, a tool magazine 40 for storing and storing tools is mounted on the Y-axis feed base 7.
[0005]
A tailstock 17 is provided on the vertical surface of the bed 1 parallel to the Z-axis direction so as to be movable in the Z-axis direction. A spindle stock 18 is provided at a position facing the tailstock 17. A spindle 19 is rotatably supported in the spindle stock 18. A chuck (not shown) is provided at one end of the main shaft 19, and a pulley 20 is fixed to the other end. On the other hand, a pulley 22 is fixed to the output shaft of the main shaft drive motor 23. A V-belt 21 is bridged between the pulley 20 and the pulley 22, and the pulley 20 is rotationally driven by the main shaft drive motor 23 via the V-belt 21.
[0006]
The rotational angle position of the main shaft 19 is controlled by the C-axis control unit 24. The C-axis control unit 24 is mounted and fixed on the head stock 18. The C-axis control unit 24 includes a C-axis control motor 25, and the rotational position of the C-axis control motor 25 controls the angular position of the main shaft 19 via a gear transmission mechanism.
[0007]
According to such a turning center, the work piece is gripped by the chuck at the tip of the spindle 19 and continuously rotated at a predetermined rotational speed, and the turning tool of the turret 16 is moved relative to the work piece in the X and Z axis directions. Can be turned. In addition, the spindle 19 is controlled in the C-axis direction, and a rotary tool provided on the turret 16 is rotated by a drive motor (not shown) to move relative to the workpiece in the X-, Y-, and Z-axis directions. Processing (rotating tool processing) using a rotating tool such as processing, drilling, and tapping can be performed. That is, a plurality of machining steps can be performed by one chucking of the workpiece.
[0008]
In order to perform machining by such a turning center, it is necessary to create an NC machining program. This NC machining program is difficult to create unless it is an operator who understands both NC machining programs for turning and rotary tool machining. Therefore, an automatic program creation device or automatic program creation for automatically creating NC machining programs is required. An NC (numerical control) device having a function is often used.
[0009]
Such an automatic program creation function includes an NC lathe automatic program creation function for performing turning and a machining center (hereinafter referred to as MC) automatic program creation function for performing machining with a rotating tool. In both automatic program creation functions, the input method of finishing shape data and the like is different. As for the NC machining program itself, the NC machining program for NC lathe, where the workpiece is rotated and machining is performed, and the NC machining program for MC, which is machined by rotating the tool, differ in the meaning of the NC command. .
[0010]
[Problems to be solved by the invention]
When an NC machining program is created by the automatic program creation function of the turning center as described above, a partial process of turning is first output, and then a partial process of rotating tool machining such as milling is output. However, there are cases where it is better to perform a process by rotating tool machining before a part of the process of turning. An example of the case where the process needs to be replaced will be described with reference to FIGS.
[0011]
For example, when turning the outer peripheral surface of the workpiece W and further drilling the outer peripheral surface with a drill, in the automatic program creation function, as shown in FIG. The NC machining program is created by arranging the steps in the order of diameter finishing and (c) drilling. Thus, since the drilling which is the rotary tool processing is the last step, when the machining is performed as it is by this NC machining program, the burrs B are finally formed on the outer peripheral surface of the workpiece W as shown in FIG. Will remain.
[0012]
As shown in FIG. 11, when the process is changed in the order of (a) outer diameter roughing, (b) drilling, and (c) outer diameter finishing, the burr B is formed by the final outer diameter finishing. Is removed and the desired final processing result is obtained. In such a case, the NC machining program that was automatically created was edited by the operator on the automatic program creation device or NC device side, and the machining process was changed. There is also a risk that the machine tool may perform an incorrect machining operation due to an editing mistake or a correction leak.
[0013]
Therefore, the present invention provides a machine tool that allows an operator to easily change the order of each machining step of an NC machining program that is automatically created, if necessary, in an automatic program creation function of a machine tool such as a turning center. It is an object of the present invention to provide a method and apparatus for creating an NC machining program for a machine.
[0014]
[Means for Solving the Problems]
In order to achieve the above object, an NC machining program creation method for a machine tool according to the present invention is an NC machining program for a machine tool capable of machining with a turning tool, that is, turning, and machining with a rotating tool, that is, rotating tool. A creation method, a procedure for inputting a shape of a material workpiece to be machined, a procedure for inputting a finished shape by the turning, a procedure for inputting a finished shape by the rotary tool machining, and a finishing by the turning One or more turning partial processes that are partial processes for forming a shape are created, and at least one rotary tool partial process that is a partial process for forming a finished shape by the rotary tool machining is created, and the turning A process display procedure for displaying the partial process and the rotary tool partial process; the turning partial process displayed in the process display procedure; An NC editing program is created by connecting an editing procedure that enables changing of the order of the turning tool partial process, the turning part process and the rotating tool partial process according to the order determined by the editing procedure, and the turning part For changing the machining type from the turning to the rotary tool machining in the connecting part where the rotary tool part process follows the process Consists of multiple NC commands Inserting a first connection program and changing the machining type from the rotary tool machining to the turning process in a connecting part where the turning part process follows the rotary tool partial process Consists of multiple NC commands And a program creation procedure for inserting the second linked program.
[0015]
In the NC machining program creation method of the machine tool, the program creation procedure includes: The first connection program and the second connection program It is preferable that different sequence numbers are sequentially assigned to the head of the NC machining program and inserted into the NC machining program.
[0017]
In the NC machining program creation method of the machine tool, the process display procedure displays a turret tool number for designating a tool to be used for the turning part process and the rotating tool part process, It is preferable to have a procedure that allows the turret tool number to be changed.
[0018]
In the NC machining program creation method for a machine tool, the turret tool number preferably includes a turret surface number that specifies a tool mounting portion of the turret and a tool number that specifies a tool.
[0019]
An NC machining program creation device for a machine tool of the present invention is an NC machining program creation device for a machine tool capable of machining with a turning tool, that is, turning, and machining with a rotating tool, that is, rotating tool. Display means capable of displaying characters or figures, input means for the operator to input data, material shape storage means for storing data of the shape of the material workpiece to be machined, and the finish shape by the turning Turning tool finishing shape storage means for storing data, rotating tool finishing shape storage means for storing finishing shape data by the rotary tool machining, and a turning partial process which is a partial process for forming the finishing shape by the turning process A rotary tool partial process that is a partial process for forming a finished shape by the rotary tool machining. It is possible to change the order of the turning part process and the rotating tool part process displayed by the process display means and the process display means which are created by displaying two or more of the turning part process and the rotating tool part process on the display means. The process sequence editing means, the turning partial process and the rotary tool partial process are connected according to the order determined by the process order editing means to create an NC machining program, and after the turning partial process, the rotary tool For changing the machining type from the turning to the rotary tool machining at the connection part where the partial process continues Consists of multiple NC commands Inserting a first connection program and changing the machining type from the rotary tool machining to the turning process in a connecting part where the turning part process follows the rotary tool partial process Consists of multiple NC commands It has program creation means for inserting a second linked program, and linked program storage means for storing the first linked program and the second linked program.
[0020]
In the NC machining program creation device for the machine tool, the program creation means includes: The first connection program and the second connection program It is preferable that different sequence numbers are sequentially assigned to the head of the NC machining program and inserted into the NC machining program.
[0022]
Further, in the NC machining program creation device of the machine tool, the process display means displays a turret tool number for designating a tool to be used for the turning part process and the rotating tool part process, It is preferable to have a tool editing means that can change the turret tool number.
[0023]
In the NC machining program creation device of the above machine tool, it is preferable that the turret tool number includes a turret surface number that specifies a tool mounting portion of the turret and a tool number that specifies a tool.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a turning center as a machine tool to which the present invention is applied. The description of each member and the operation of the turning center are as described above. This turning center is controlled by the NC device 50 (see FIG. 2). Further, an automatic program creation device 60 is connected to the NC device 50.
[0025]
FIG. 2 is a block diagram showing the configuration of the automatic program creation device 60. Here, the automatic program creation device 60 is provided separately from the NC device 50 and connected to the NC device 50. However, the automatic program creation device 60 may be incorporated in the NC device 50. The automatic program creation device 60 is provided with a CPU 61 as information processing means for performing various data processing, and a ROM 63 and a RAM 64 are connected to the CPU 61 as a main storage device via a bus 62.
[0026]
The CPU 61 operates in accordance with the system program and data stored in the ROM 63 and the program and data loaded into the RAM 64 (read into the memory). As programs loaded in the RAM 64 in this way, the OS (operating system) that is a basic program, the automatic professional function program 641 for realizing the automatic program creation function, and the automatic professional function program 641 created by the automatic professional function program 641 are used. There are a combination process editing program 642 for changing the order of the partial processes and editing the turret tool number, a display control program for displaying characters and figures on the display means 69, and the like.
[0027]
A parameter memory 65 is connected to the CPU 61 via a bus 62. The parameter memory 65 stores various parameters necessary for processing. The parameter memory 65 can retain the stored contents even when the power of the machine tool is turned off by using a nonvolatile memory. The parameter memory 65 stores data of a connection program 651 that is inserted between the NC machining program for turning and the NC machining program for rotary tool machining to enable connection between the machining steps. The connection program 651 includes two types of data, a connection process A and a connection process B, as will be described later.
[0028]
Further, a material shape memory 66, a turning tool finishing shape memory 67, and a rotating tool finishing shape memory 68 are connected to the CPU 61 via a bus 62. The material shape memory 66 stores material workpiece shape data input by the operator. The turning tool finish shape memory 67 stores finish shape data in the turning process input by the operator. The rotary tool finish shape memory 68 stores finish shape data input by the operator in the rotary tool processing. The material shape memory 66, the turning tool finishing shape memory 67, and the rotating tool finishing shape memory 68 can also retain the stored contents even when the machine tool is turned off by using the nonvolatile memory.
[0029]
Input / output devices are connected to the CPU 61 via the bus 62. As input / output devices, display means 69 for displaying characters and figures, and input means 70 for an operator to input data are connected to the bus 62 via an interface circuit. A CRT, EL display panel, liquid crystal display, or the like can be used as the display unit 69, and a keyboard, a touch panel combined with the display unit 69, or the like can be used as the input unit 70.
[0030]
Further, a fixed disk device as an auxiliary storage device may be connected to the CPU 61 via the bus 62. In that case, various programs and data to be executed by the CPU 61 are stored in the fixed disk device, and these programs and the like may be appropriately loaded from the fixed disk device to the RAM 64 and other memories.
[0031]
The cutting condition data file 71 is a data file that is provided on a memory or a fixed disk and stores a large number of cutting condition data. Similarly, the tool data file 72 is a data file which is provided on a memory or a fixed disk and stores a large number of tool data (data such as tool type and tool size).
[0032]
The process order data file 73 is a data file that is provided on a memory or a fixed disk and stores the order of a plurality of partial processes corresponding to machining with a turning tool and machining with a rotating tool. For example, in the case of machining with a rotating tool, milling roughing process, center machining process, drilling process, boring roughing process, chamfering process, tapping process, ..., boring finishing process, milling The order as in the finishing process is stored. Also, in the case of machining with a turning tool, the order of transition from the rough machining process to the finishing process is stored.
[0033]
An NC device 50 is connected to the automatic program creation device 60 via an interface circuit. The NC machining program created by the automatic program creation device 60 is transferred to the NC device 50 and stored in a memory or the like in the NC device 50. The NC device 50 controls the relative movement of the turning center tool and workpiece in the X, Y, and Z axis directions according to the NC machining program, and performs machining by performing rotation control of the spindle 19 and C axis control. . Further, the NC device 50 performs indexing control of the turret 16 and positions a desired turning tool or rotating tool at the machining position.
[0034]
FIG. 3 is a diagram showing a screen display for creating a program confirmation displayed on the display means 69 of the automatic program creation device 60. From this screen, NC machining programs for turning and rotary tool machining are automatically created. When the F1 key is pressed, the screen shifts to the NC machining program creation screen for turning. On the NC machining program creation screen for turning, the input of the shape of the material workpiece and the finished shape of the turning work are performed, and the NC machining program is automatically created. The material workpiece shape data and turning finish shape data input by the operator are stored in the material shape memory 66 and the turning tool finish shape memory 67.
[0035]
When the F3 key is pressed from the program confirmation creation screen of FIG. 3, the screen shifts to the NC machining program creation screen for rotary tool machining. On the NC machining program creation screen for rotary tool machining, the finish shape of the rotary tool machining is input and the NC machining program is automatically created. The rotary tool finishing shape data input by the operator is stored in the rotary tool finishing shape memory 68. When the F5 key is pressed from the program confirmation creation screen, the screen shifts to the combination process editing screen of FIG. Further, when the F9 key is pressed, the program confirmation creation screen is terminated and the upper menu screen is displayed.
[0036]
FIG. 4 is a diagram illustrating a screen display for the combination process editing. This screen is called by pressing the F5 key from the program confirmation creation screen of FIG. In the upper left part of the screen, the partial processes of the NC machining program created on the program confirmation creation screen are arranged in order and displayed as a process chart. As for the order of each partial process, the partial process of turning is arranged first, and the partial process of rotary tool processing is after. There are two types of drill tools: a drill tool as a fixed tool used for turning and a drill tool as a rotary tool used for rotary tool processing. The drill tool of process number 2 is a drill tool as a fixed tool. The end face drill tool of process number 8 is a drill tool as a rotary tool. Instructions related to operations are displayed on the right side of the process chart.
[0037]
On this combined process edit screen, the NC machining program for each partial process can be edited by moving the cursor to the desired process number in the process number column at the left end of the process table and pressing the F3 key. The process number is displayed in green in the turning process and is displayed in white in the rotary tool process. When the F4 key is pressed, the order of the processes can be changed. When the F4 key is pressed, the start number and end number of range 1 and range 2 below the process table can be input. When a desired process number is input here and the F4 key is pressed again, the partial process group in range 1 and the partial process group in range 2 are interchanged.
[0038]
When the F5 key is pressed, a desired range of steps can be transferred to a desired position. When the F5 key is pressed, the start number, end number, and transfer destination number in the lower range 1 of the process table can be input. When a desired process number is input here and the F5 key is pressed again, the partial process group in range 1 is transferred to a position immediately above the partial process having the transfer destination number. When the F6 key is pressed, the data in the turret tool number column can be changed.
[0039]
In the data of “Tmm nn” in the turret tool number column, “mm” designates the turret surface number, and “nn” designates the tool number. Turret surface numbers 1 to 10 are assigned to the ten tool mounting portions of the turret 16, respectively. By specifying the turret surface number, the tool mounting portion on which a desired tool is mounted can be determined at the machining position. it can. In addition, when the tool of the specified tool number is not mounted on the tool mounting portion of the specified turret surface number, after the tool specified by the automatic tool changer 30 is automatically mounted on the specified tool mounting portion, The specified tool mounting part is determined at the machining position.
[0040]
When the F6 key is pressed on the combined process edit screen, the cursor is displayed in the data section of the turret tool number column, and the cursor is moved to the data to be corrected by the cursor key and page key. Correct the data. In the NC machining program automatically created by the automatic professional function program 641, a different turret surface number is designated for each of a series of processes performed continuously. Therefore, there is a possibility that the number of tool changes by the automatic tool changer 30 may increase more than necessary. In such a case, the data of the turret surface number and tool number can be corrected to minimize the number of times of tool change.
[0041]
When the F8 key is pressed on the combined process edit screen, the subprogram called from the process program in the cursor line can be edited. In addition, when a cursor is placed on a desired process number and an erase key (not shown) is pressed, the process can be erased. When the F1 key is pressed after the above editing operation, a new NC machining program reflecting the editing result is automatically created. At that time, different types of partial processes are required at the location where the rotary tool machining partial process is connected after the turning partial process, and at the location where the turning partial process is connected after the rotary tool machining partial process. The programs of the connection processes A and B that enable the connection are inserted.
[0042]
Further, when the F2 key is pressed on the coupling process edit screen, the machining operation of the created NC machining program is displayed as a moving image on the screen, whereby the NC machining program can be checked. When the F9 key is pressed, the joining process editing screen is terminated and the program confirmation creation screen shown in FIG. 3 is returned.
[0043]
FIG. 5 is a diagram illustrating an example of replacement of partial processes. FIG. 5A shows the order of the partial steps in the NC machining program automatically created by the automatic professional function program 641. The partial processes of process numbers 1 to 6 are turning processes, and the partial processes of process numbers 7 to 10 are rotary tool processes. In this way, in the NC machining program output by the automatic professional function program 641, the partial processes for turning are arranged first, and the partial processes for rotating tool machining are after. FIG. 5B shows a result obtained by editing and replacing the automatically created process sequence on the combined process editing screen. Further, in FIG. 5B, not only the process order is changed but also the data of the turret tool number is corrected.
[0044]
FIG. 6 is a diagram showing a change in the configuration of the NC machining program when the process is changed as shown in FIG. The NC machining program in the process sequence of FIG. 5A is shown in FIG. 6A, and the NC machining program in the process sequence of FIG. 5B is shown in FIG. 6B. Each line in FIGS. 6A and 6B shows the processing of the NC machining program for executing each partial process, and the leftmost number corresponds to the process number in FIGS. 5A and 5B. . Lines with blank numbers at the left end are other automatically created program parts that are not displayed in FIGS. 5 (a) and 5 (b).
[0045]
In order to change the machining type from turning to rotary tool machining, it is necessary to execute the program of the linkage process A. To change the machining type from rotary tool machining to turning, the program of the linkage process B is executed. There is a need. In the NC machining program of FIG. 6 (a), the connection process A is arranged between the inner threading process of process number 6 and the end face fitting process of process number 7, and the connection process B is performed after the end face tapping process of process number 10. Has been placed. In this way, at the end of the NC machining program, the mode is returned to the turning mode.
[0046]
In the combined process edit screen, when the order of processes is changed as shown in FIGS. 5A to 5B and the F1 key is pressed to instruct the creation of an NC machining program, the NC machining program is shown in FIG. 6A. 6 (b) is changed. The program of the connection process A is inserted in the place where the machining type is changed from turning to rotary tool machining (between process numbers 1, 2, 3, 4, 5, 6, 7, and 8). Is automatically inserted in the place where the rotary tool machining is changed to the turning machining (between process numbers 2 and 3, 4, 5, 6, 7, 8, 9).
[0047]
FIG. 7 is a diagram illustrating an example of the connection processes A and B. FIG. 7A shows a program for the connection process A, and FIG. 7B shows a program for the connection process B. These connection processes A and B are stored as a connection program 651 in the parameter memory 65 of the automatic program creation device 60.
[0048]
“N50000” in the first line of the connection process A in FIG. 7A is a sequence number, and when the connection process A is actually inserted into the NC machining program, “N50000”, “N50001”, and so on. Each time it is inserted, it is incremented by one. “M09” is a command to stop the supply of the cutting fluid. “G80” in the second line is a command to cancel the fixed cycle, and “M05” is a command to stop the spindle rotation. “G50S3000P2” in the third line is a command for setting a limit value for the rotational speed of the rotary tool. “M01” on the fourth line is an optional stop command.
[0049]
“N51000” in the first line of the connection process B in FIG. 7B is a sequence number, and when the connection process B is actually inserted into the NC machining program, “N51000”, “N51001”, and so on. Each time it is inserted, it is incremented by one. “G18” is a command for designating the coordinate plane as the Z-X plane, “G97” is a command for canceling the constant peripheral speed control of the spindle, “G99” is a command for instructing a feed per revolution, and “M41” is a diameter correction. Command to cancel. “M01” in the second line is an optional stop command.
[0050]
The connection processes A and B are not limited to these examples, and other arbitrary NC commands can be registered. In the concatenation process A, the first sequence number is incremented by 1 sequentially from “50000”, and in the concatenation process B, the first sequence number is incremented by 1 sequentially from “51000”. This is convenient when searching for concatenation processing. For example, the operation is facilitated when the machining operation of the NC machining program is interrupted and then the NC machining program is resumed from the middle.
[0051]
FIG. 8 is a flowchart showing a procedure for creating an NC machining program by the automatic program creation device 60. In step 101, the operator inputs the shape of the material workpiece. Next, in step 102, a finishing shape for turning is input, and in step 103, a finishing shape for rotary tool processing is input. Next, in step 104, the index position of the workpiece and the processing type are set. Then, in step 105, an automatic creation of an NC machining program is instructed, and an NC machining program for turning and rotary tool machining is automatically created.
[0052]
Next, in step 106, the NC process program is changed and created by changing the order of the processes, changing the turret tool number, etc. on the combined process editing screen of FIG. At this time, since the process change operation, the turret tool number change operation, etc. can be easily performed on the screen as shown in FIG. 4, it is not necessary to directly edit the code of the NC machining program, and the edit operation can be easily performed. In addition, editing mistakes are less likely to occur.
[0053]
Then, the NC machining program is checked by displaying the machining operation of the NC machining program created in step 107 on the screen as a moving image. If there is no problem in the machining operation, the NC machining program is transferred to the NC device 50 in step 108, and the NC machining program creation work is terminated.
[0054]
FIG. 9 is a flowchart showing the processing of the joining process editing program 642. The joining process editing program 642 is a program that is called from the automatic professional function program 641 and performs processing of the joining process editing screen of FIG. When the joining process editing program 642 is called, first, in a process 201, a joining process editing screen is displayed. Next, it is determined in decision 202 whether or not the F1 key has been pressed. If the F1 key has not been pressed, the process proceeds to decision 203. If the F1 key has been pressed, an NC machining program is created from the current data in process 210, and then the process returns to decision 202.
[0055]
In determination 203, it is determined whether or not the F2 key is pressed. If the F2 key has not been pressed, the process proceeds to decision 204. If the F2 key has been pressed, the moving image check screen of the NC machining program is displayed in process 211, and if the moving image check is completed, the flow returns to decision 202. In the next determination 204, it is determined whether or not the F3 key is pressed. If the F3 key has not been pressed, the process proceeds to decision 205. If the F3 key has been pressed, the NC machining program edit screen is displayed in step 212, and if editing is completed, the process returns to decision 202.
[0056]
In determination 205, it is determined whether or not the F4 key is pressed. If the F4 key has not been pressed, the process proceeds to decision 206. If the F4 key has been pressed, the process is changed in accordance with the operator's instruction in step 213, and then the process returns to decision 202. In the next determination 206, it is determined whether or not the F5 key is pressed. If the F5 key has not been pressed, the process proceeds to decision 207. If the F5 key has been pressed, the process is transferred in accordance with the operator's instruction in process 214, and then the process returns to decision 202.
[0057]
In determination 207, it is determined whether or not the F6 key is pressed. If the F6 key has not been pressed, the process proceeds to decision 208. If it has been pressed, the turret tool number is changed in step 215, and then the process returns to decision 202. In the next determination 208, it is determined whether or not the F8 key is pressed. If the F8 key has not been pressed, the process proceeds to decision 209. If the F8 key has been depressed, the subprogram editing screen is displayed in step 216, and if editing is completed, the process returns to decision 202. In the final determination 209, it is determined whether or not the F9 key is pressed. If the F9 key has not been pressed, the process returns to decision 202;
[0058]
As described above, since the connection processes A and B are automatically inserted between the partial processes when creating the NC machining program, the operator can change the order of the partial processes automatically created by the automatic program creation device. The optimal order can be easily achieved. For this reason, the processing result can be optimized with the minimum number of steps. Further, since the turret tool number automatically created by the automatic program creation device can be easily changed, machining can be efficiently performed with the minimum number of tool exchanges.
[0059]
In the above embodiment, the turning center has been described as an example of a machine tool. However, the present invention can be applied to any machine tool as long as both machining with a turning tool and machining with a rotary tool are possible. .
[0060]
【The invention's effect】
Since the connecting program is automatically inserted between the partial processes when creating the NC machining program, the operator can easily change the order of the partial processes to the optimum order. For this reason, the processing result can be optimized with the minimum number of steps. Further, it is not necessary to directly edit the NC machining program code, and the process sequence can be easily edited, so that editing errors and correction errors are less likely to occur.
[0061]
Since different sequence numbers are sequentially assigned to the head of the connection program and inserted into the NC machining program, it is convenient when searching for a connection part of a partial process. In particular, the operation is facilitated when the machining operation of the NC machining program is interrupted and then the NC machining program is resumed from the middle.
[0062]
Since the turret tool number automatically created by the automatic program creation device can be easily changed, machining can be efficiently performed with the minimum number of tool changes.
[Brief description of the drawings]
FIG. 1 is a perspective view of a turning center to which the present invention is applied.
FIG. 2 is a block diagram illustrating a configuration of an automatic program creation device.
FIG. 3 is a diagram showing a screen display for creating a program confirmation;
FIG. 4 is a diagram illustrating a screen display of a combination process editing.
FIG. 5 is a diagram illustrating an example of a process change.
FIG. 6 is a diagram showing a change in the configuration of an NC machining program when a process is changed.
FIG. 7 is a diagram illustrating an example of connection processing;
FIG. 8 is a flowchart showing a procedure for creating an NC machining program by an automatic program creation device.
FIG. 9 is a flowchart showing processing of a joining process editing program.
FIG. 10 is a diagram for illustrating a difference in processing results depending on the order of steps.
FIG. 11 is a diagram illustrating a processing result when the order of steps is changed.
[Explanation of symbols]
1 ... Bed
2 ... Z-axis guide member
3 ... round-trip
7 ... Y-axis feed base
B ... Bali
W ... Workpiece
11 ... Turret body
16 ... Turret
17 ... Tailstock
18 ... headstock
19 ... Spindle
20 ... pulley
22 ... Pulley
21 ... V belt
23 ... Spindle drive motor
24 ... C-axis control unit
25 ... C-axis control motor
26 ... Z-axis motor
30 ... Automatic tool changer
40 ... Tool magazine
50 ... NC device
60 ... Automatic program creation device

Claims (8)

An NC machining program creation method for a machine tool capable of machining with a turning tool, that is, turning and machining with a rotating tool, that is, rotating tool,
A procedure for entering the shape of the workpiece to be machined;
A procedure for inputting a finishing shape by the turning process;
A procedure for inputting a finishing shape by the rotary tool machining;
One or more turning partial processes, which are partial processes for forming the finished shape by the turning process, are created, and one or more rotating tool partial processes, which are partial processes for forming the finished shape by the rotating tool machining, are created. Creating and displaying the turning partial process and the rotating tool partial process;
An editing procedure that enables the change of the order of the turning part process and the rotating tool part process displayed in the process display procedure,
The turning part process and the rotating tool part process are connected in accordance with the order determined by the editing procedure to create an NC machining program, and the turning process is performed on a connecting part where the rotating tool part process follows the turning part process. To the rotary tool machining is inserted a first connection program consisting of a plurality of NC commands for changing the machining type, and from the rotary tool machining to the connecting part where the turning part process follows the rotary tool part process An NC machining program creation method for a machine tool, comprising: a program creation procedure for inserting a second connection program comprising a plurality of NC commands for changing the machining type for turning. An NC machining program creation method for a machine tool according to claim 1,
An NC machining program creation method for a machine tool, in which the program creation procedure is such that different sequence numbers are sequentially assigned to the heads of the first linkage program and the second linkage program and inserted into the NC machining program. . An NC machining program creation method for a machine tool according to any one of claims 1 and 2,
The process display procedure displays a turret tool number for designating a tool to be used for the turning partial process and the rotary tool partial process.
An NC machining program creation method for a machine tool, having a procedure for changing the turret tool number. An NC machining program creation method for a machine tool according to claim 3,
An NC machining program creation method for a machine tool, wherein the turret tool number includes a turret surface number for designating a tool mounting portion of the turret and a tool number for designating a tool. An NC machining program creation device for a machine tool capable of machining with a turning tool, that is, turning, and machining with a rotating tool, that is, rotating tool,
Display means (69) capable of displaying characters or figures;
An input means (70) for an operator to input data;
Material shape storage means (66) for storing data of the shape of the material workpiece to be processed;
Turning tool finishing shape storage means (67) for storing finishing shape data by the turning,
Rotary tool finish shape storage means (68) for storing data of the finished shape by the rotary tool processing;
One or more turning partial processes, which are partial processes for forming the finished shape by the turning process, are created, and one or more rotating tool partial processes, which are partial processes for forming the finished shape by the rotating tool machining, are created. Creating and displaying the turning partial process and the rotating tool partial process on the display means (69);
A process sequence editing means (642) that enables changing the order of the turning part process and the rotary tool part process displayed by the process display means (642);
The turning part process and the rotating tool part process are connected in accordance with the order determined by the process order editing means (642) to create an NC machining program, and the turning part process is followed by the rotating tool part process. A first connection program comprising a plurality of NC commands for changing the machining type from the turning to the rotary tool machining is inserted into the part, and the connecting part in which the turning part process follows the rotary tool part process is inserted into the connection part. A program creation means (642) for inserting a second connection program comprising a plurality of NC commands for changing the machining type from the rotary tool machining to the turning machining;
An NC machining program creation device for a machine tool, comprising connection program storage means (65) for storing the first connection program and the second connection program. An NC machining program creation device for a machine tool according to claim 5,
The program creation means (642) assigns different sequence numbers to the heads of the first connection program and the second connection program and inserts them into the NC machining program. Program creation device. An NC machining program creation device for a machine tool according to any one of claims 5 and 6,
The process display means (642) displays a turret tool number for designating a tool used for the turning part process and the rotating tool part process,
An NC machining program creation device for a machine tool, having tool editing means (642) that allows the turret tool number to be changed. An NC machining program creation device for a machine tool according to claim 7,
The machine tool NC machining program creation device, wherein the turret tool number includes a turret surface number designating a tool mounting portion of the turret and a tool number designating a tool.

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