JP6520377B2 - Control device, machine tool, control program, and control method - Google Patents

Description

  The present invention relates to a control device, a machine tool, a control program, and a control method.

  A lathe, which is one of machine tools, holds a work to be processed on a main spindle, and rotates the work while performing cutting with a cutting tool such as a cutting tool held by a tool post. There is a limit to the number of cutting tools that can be held by one tool post. For example, there is a machine tool in which a plurality of tool posts are provided for one spindle (see, for example, Patent Document 1 below). The opposing two-axis lathe described in Patent Document 1 includes a plurality of main spindles, a plurality of upper tool rests, and a lower tool rest. The upper tool rest is provided, for example, for each spindle, and the lower tool rest is, for example, commonly provided for a plurality of spindles. In the lower tool post, for example, the upper tool post performs further processing on the processed workpiece, or the process is performed in parallel with the upper tool post.

  A machine tool usually processes a workpiece by numerical control (NC) (see, for example, Patent Document 2 below). The processing data used for numerical control is, for example, NC data or the like for which the user has specified the content and timing of the process. Each process is allocated to the tool rest according to the contents, and the machine tool performs each process at the timing specified in the processing data. The timing to start each process is determined by taking a margin from the end of the previous process in order to avoid interference of the tool rest. For example, after the process of the tool rest for one work is completed, these tool rests are in a standby state (waiting state) until the process of the other tool rest for the work is started.

Patent No. 5375500 gazette Unexamined-Japanese-Patent No. 4-69131

  In the machine tool as described above, when the total number of waiting times and the total time increase in a series of processes, the processing efficiency decreases. The total number of standby states depends on the order of processes (processing data), etc. In order to suppress the decrease in processing efficiency, the user tries to optimize processing data by trial and error, etc. The burden on the user increases. Thus, under the present circumstances, it is difficult to avoid the decrease in processing efficiency while suppressing the burden on the user.

  The present invention has been made in view of the above-described circumstances, and it is an object of the present invention to provide a control device, a machine tool, a control program, and a control method capable of suppressing the burden on the user while avoiding a decrease in processing efficiency. Do.

  The control device of the present invention controls the main tool post and the secondary tool post that holds the cutting tool that is held by the main shaft and cuts the rotating workpiece, according to the processing data that defines the process of the main tool post and the process of the secondary tool post Control device, comprising: a main control unit for controlling the main tool post, and a sub control unit for controlling the sub tool post, the main control unit sequentially executing the steps of the main tool post, and the sub blade The command to start the process of the stand is issued to the sub control unit, and the sub control unit executes the process of the sub tool post according to the command when the sub tool post is in the standby state, and the process of the sub tool post is completed When it does, make the secondary cutter stand ready.

  In addition, when the sub control unit causes the sub tool post to execute a process according to a command, the sub control unit may send a notification to the effect that the process is to be performed to the main control unit. Further, the main control unit may advance the main tool post to the next process in response to the notification. The sub control unit may send a notification to the effect that the process has ended to the main control unit when the process of the sub tool post according to the command is completed. A plurality of spindles may be provided, the main tool post and the main control unit may be provided in one-to-one correspondence with the spindles, and the sub tool post and the sub control unit may be commonly provided to two or more spindles. In addition, the secondary control unit may suspend execution of a command of the secondary tool post process for the work held on the second main spindle during the process of the secondary tool post for the work held on the first main spindle. . The sub control unit may execute a command of the process of the sub tool post on the work held on the second main spindle after the process of the sub tool post on the work held on the first main spindle is completed. . In addition, when the process of the main tool post and the process of the sub tool post are performed in parallel, the start timing of the process of the main tool post and the start timing of the process of the sub tool post may be adjusted.

  The machine tool according to the present invention includes a main spindle that holds and rotates a work, a main tool post and a secondary tool post that holds a cutting tool that cuts the work, and a control that defines the process of the main tool post and the process of the secondary tool post And a control device for controlling the main tool post and the secondary tool post according to a program.

  The control program of the present invention controls the main tool post and the secondary tool post that holds the cutting tool that is held on the main shaft and cuts the rotating workpiece, according to the processing data that defines the process of the main tool post and the process for the secondary tool post Control program, including a main control program that causes the computer to execute control of the main tool post, and a sub control program that causes control of the sub tool post, the main control program performing the process of the main tool post The secondary control program issues a command to the secondary control program to sequentially execute and start the process of the secondary cutter, and the secondary control program causes the secondary cutter to execute the process according to the command when the secondary cutter is in the standby state. When the process of the auxiliary cutter rest is completed, the auxiliary cutter rest is put on standby.

The control method of the present invention controls the main tool post and the secondary tool post that holds the cutting tool that is held on the main shaft and cuts the rotating workpiece, according to the processing data that defines the process of the main tool post and the process for the secondary tool post Control method, including controlling the main tool post by the main control unit and controlling the sub tool post by the sub control unit, the main control unit executing the steps of the main tool post in order Command to start the process of the secondary cutter, to the secondary control unit , the secondary control unit executes the process of the secondary cutter according to the command when the secondary cutter is in the standby state, and the secondary cutter When the second process is completed, the auxiliary tool rest is put on standby.

  According to the present invention, since the process is started by the auxiliary tool rest in response to the command when the auxiliary tool rest is in the standby state, the wait state can be reduced, and a reduction in processing efficiency can be avoided. In addition, since the secondary cutter rest starts the process according to the command, it is not necessary to predetermine the timing at which the secondary cutter rest starts the process, and it is possible to reduce the burden of determining this timing by the user.

  When the sub control unit sends a notification to the main control unit to execute the process when the sub control unit performs the process according to the command, the main control unit executes the process of the sub tool post For example, robust control can be performed. Further, in the case where the main control unit advances the main tool post to the next process in response to the notification, for example, since the next process of the main tool post can be promptly started and the waiting time can be reduced, processing A drop in efficiency can be avoided. In addition, when the sub control unit sends a notification to the main control unit that the process has ended when the process of the sub tool post according to the command is completed, the main control unit ends the process of the sub tool post Because it is possible to grasp whether or not to do, for example, robust control can be performed. In addition, a plurality of spindles are provided, the main tool post and the main control unit are provided in one-to-one correspondence with the spindle, and the sub tool post and the sub control unit are commonly provided to two or more spindles. The number of secondary cutters can be reduced compared to the case where secondary cutters are provided each time. In addition, since the secondary tool rest starts the process in response to the command issued by the main control unit for the work held on each spindle, it is possible to avoid that the processing data becomes complicated, for example, processing The burden on the user when creating data can be reduced. Further, in the secondary control unit, during the process of the secondary tool rest on the work held on the first main spindle, the execution of the command of the process on the secondary cutter post on the work held on the second main spindle is suspended. Since the start of the process on the second spindle side is suspended during the stroke on the first spindle side by the auxiliary tool post, for example, robust control can be performed. In addition, in the secondary control unit, after completion of the process of the secondary tool rest for the workpiece held by the first spindle, the command of the process of the secondary cutter rest for the workpiece held by the second spindle is executed. Since the process for the workpiece held in the second spindle is executed according to the command issued by the main control unit, it is less necessary to predetermine the timing to start the process of the secondary cutter, for example, to create machining data The burden on the user can be reduced. In addition, when performing the process of the main tool post and the process of the sub tool post in parallel, in the case of adjusting the start timing of the process of the main tool post and the start timing of the process of the sub tool post, for example, the main blade The start timing can be set with high accuracy in the process of the table and the process of the auxiliary tool post.

It is a figure showing an example of the machine tool concerning this embodiment. It is a conceptual diagram which shows an example of process data. It is a flowchart which shows the example of the control method which concerns on this embodiment. It is a conceptual diagram which shows the other example of process data. It is a flowchart which shows the other example of the control method which concerns on this embodiment. It is a conceptual diagram which shows the other example of process data. It is a flowchart which shows the other example of the control method which concerns on this embodiment. It is a figure showing roughly a machine tool concerning a modification.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to this. In addition, in the drawings, the scale is appropriately changed and expressed such as partially or partially emphasizing.

  FIG. 1 is a view showing an example of a machine tool 1A according to the present embodiment. The machine tool 1A is an opposed two-axis lathe. The machine tool 1A includes a plurality of main spindles (first main spindle 2 and second main spindle 3), a plurality of main tool rests (first main tool rest 4 and a second main tool rest 5), and a sub tool rest 6 , And the control device 7. The first main tool post 4 and the second main tool post 5 are respectively provided in a one-to-one correspondence with a plurality of main spindles, and the first main tool post 4 corresponds to the first main spindle 2 and a second main blade The table 5 corresponds to the second spindle 3. The auxiliary tool post 6 is provided commonly to two or more spindles (first spindle 2 and second spindle 3).

  The first main tool post 4 and the sub tool post 6 can share the cutting process on the workpiece W1. For example, the machine tool 1A can perform cutting processing efficiently by performing cutting processing in parallel with the first tool rest 4 and the sub-tool rest 6. In addition, when machine tool 1A performs multi-stage cutting on work W1, for example, while first main tool post 4 cuts the outer peripheral portion first, sub-tool stand 6 after first main tool post 4 is cut It is also possible to cut it further. Further, in the machine tool 1A, it is possible to perform cutting such that the first main tool post 4 rough-cuts the work W1 and the sub-tool post 6 performs finishing. Similarly, the second main tool rest 5 and the sub tool rest 6 can be divided to perform cutting on the workpiece W2.

  The first main spindle 2 is rotatable while holding the workpiece W1. The work W1 is, for example, of a shape having a cylindrical surface (for example, a cylindrical shape, a cylindrical shape), but the shape is not limited. The first main tool post 4 holds a cutting tool T1 for cutting the workpiece W1. The second main spindle 3 is rotatable while holding the workpiece W2. The workpiece W2 has, for example, the same shape as the workpiece W1, but may have a shape different from the workpiece W1. The second main tool post 5 holds a cutting tool T2 for cutting the workpiece W2. The secondary tool rest 6 holds a cutting tool T3 for cutting the workpiece W1 or the workpiece W2.

  In each of the following drawings, directions in the drawings will be described using a XYZ coordinate system as appropriate. Further, in each of the X direction, the Y direction, and the Z direction, the side to which the arrow points is indicated by the + side (eg, + X side), and the opposite side is indicated by the − side (eg, −X side). In this XYZ coordinate system, the Z direction is a direction parallel to the rotation axes of the first main spindle 2 and the second main spindle, and is, for example, a horizontal direction. Further, the X direction is a direction that defines the amount of cutting on the workpiece W1 and the workpiece W2. The Y direction is a direction orthogonal to each of the X direction and the Z direction. The XY plane is, for example, a plane inclined with respect to the horizontal plane. In FIG. 1, the + Y side of the machine tool 1A is the front, and the -Y side is the back. Further, the ± Z side of the machine tool 1A is a side surface, and the Z direction is the left-right direction of the machine tool 1A.

  The first spindle 2 is rotatably supported by the spindle stock 10. The headstock 10 is provided, for example, on a base (not shown). The headstock 10 is fixed to the base, but may be movable in the Z direction, the X direction, the Y direction, etc., and may be moved by driving a motor or the like. A chuck drive unit 11 is provided at an end on the + Z side of the first spindle 2. The chuck driving unit 11 moves the plurality of gripping claws 12 in the radial direction of the first spindle 2 and causes the gripping claws 12 to grip the workpiece W1. The number and shape of the gripping claws 12 are not limited, and the gripping claws 12 may have any configuration capable of holding the workpiece W1. The workpiece W1 is carried into the first spindle 2 from a loader device (not shown), and the workpiece W1 is held by the gripping claws 12 gripping the workpiece W1.

  The end on the -Z side of the first spindle 2 protrudes from the spindle stock 10 in the -Z direction, and a pulley 13 is attached to this end. A belt 14 is stretched between the pulley 13 and the rotational shaft of a motor (not shown). This motor is provided, for example, on the above-described base, and includes a torque control mechanism. The rotation of the motor causes the belt 14 to rotate, and the rotation of the belt 14 causes the pulley 13 to rotate. The first main spindle 2 rotates around a rotation axis parallel to the Z direction as the pulley 13 rotates. The mechanism for rotating the first main shaft 2 is not limited to the above-described mechanism, and may transmit, for example, the drive of the motor to the first main shaft 2 by a gear train or the like.

  The second main axis 3 is provided symmetrically to the first main axis 2 with respect to the XY plane. The mechanism for supporting the second main spindle 3 and the mechanism for rotating the second main spindle 3 are the same as those of the first main spindle 2, and the same reference numerals are given and the description thereof is omitted. Although in FIG. 1 the work W1 and the work W2 are held in a cantilevered manner individually on the first spindle 2 and the second spindle 3, one of the first spindle 2 and the second spindle 3 is used. It is also possible to hold the work in a double-ended manner.

  The first main tool post 4 is, for example, a turret, and is disposed on the + X side with respect to the first main spindle 2. The first main tool post 4 is provided so as to be movable in at least the X direction, and is movable in each of the X direction and the Z direction here. In the machine tool 1A, the first spindle 2 may be movable in the Z direction. In this case, the first tool post 4 may move in the Z direction or may not move in the Z direction. . Hereinafter, an example of a moving mechanism of the first main tool post 4 will be described. The machine tool 1A is provided with a Z guide 20 extending in the Z direction. The Z-guide 20 is provided with a Z-slide 21 movable in the Z direction along the Z-guide 20. The Z slide 21 is moved in the Z direction by the Z drive unit 22 and is held at a predetermined position. For example, an electric motor or hydraulic pressure is used as the Z drive unit 22. The Z slide is provided with an X guide 23 extending in the X direction and an X slide 24 movable along the X guide 23. The X slide 24 moves in the X direction by the drive of the X drive unit 25 and is held at a predetermined position. For example, an electric motor or hydraulic pressure is used as the X drive unit 25. The X-slide 24 is provided with a tool post drive unit 26. A rotary drive (not shown) such as a motor is used for the tool post drive unit 26. The first main tool rest 4 is attached to the tool rest driving unit 26. The first main tool post 4 is rotatable about a rotation axis parallel to the Z direction by the drive of a rotary drive.

  On the circumferential surface of the first main tool post 4, a plurality of stations for holding the cutting tool T1 (tool) are provided. The cutting tool T1 is held at all or some of the plurality of stations for each station. By rotating the first main tool post 4, a desired cutting tool T1 is selected. The cutting tool T1 held at the station of the first main tool post 4 is exchangeable for each station. As the cutting tool T1, a rotary tool such as a drill or an end mill may be used in addition to a cutting tool or the like that performs cutting on the workpiece W1. A tool unit 27 is attached to the first main tool post 4 as one of a plurality of stations. The cutting tool T1 is attached to the tool unit 27 via a holder (not shown). Further, the first main tool post 4 is not limited to the turret, and may be a comb-like tool post. The cutting tool T1 is held in each of the plurality of comb tooth portions, and the comb tooth-like tool rest selects one of the plurality of cutting tools T1 by moving in a direction in which the comb teeth are aligned.

  The second main tool post 5 is provided symmetrically to the first main tool post 4 with respect to the XY plane. The mechanism for supporting the second main tool rest 5 and the mechanism for driving the second main tool rest 5 are the same as those of the first main tool rest 4, and the same reference numerals are given and the description thereof is omitted. The cutting tool T2 held by the second main tool post 5 may be the same as the cutting tool T1 held by the first main tool post 4 or may be different from the cutting tool T1.

  The auxiliary tool post 6 is disposed, for example, on the opposite side (−X side) of the first main tool post 4 to the first main spindle 2. With regard to the mechanism for supporting the secondary blade stand 6 and the mechanism for driving the secondary blade stand 6, the same components as those of the first primary blade stand 4 are given the same reference numerals and the description thereof will be omitted. The auxiliary tool post 6 can perform cutting on a position P1 at which the workpiece W1 held by the first spindle 2 can be cut and the workpiece W2 held by the second spindle 3 It can move between the position P2. Here, the first main spindle 2 and the second main spindle 3 are disposed apart in the Z direction, and the auxiliary tool post 6 is movable in the Z direction. In the machine tool 1A, a Z-guide 28 is provided in parallel with the direction connecting the first spindle 2 and the second spindle 3, and the auxiliary tool post 6 moves along the Z-guide 28. The Z guide 28 is longer in the Z direction as compared with the Z guide 20 used for moving the first main tool post 4 and extends to the + Z side more than the Z guide 20.

  The cutting tool T3 held by the auxiliary tool rest 6 is different from the cutting tool T1 held by the first main tool rest 4, for example, and the auxiliary tool rest 6 is different from the first main tool rest 4 with respect to the work W1. It is possible to perform cutting. The number of cutting tools T3 (number of stations) that can be held by the auxiliary tool post 6 is smaller than, for example, the number of cutting tools T3 that can be held by the first main tool post 4 (the number of stations). For example, the number of stations of the first main tool post 4 and the number of stations of the second main tool post 5 are each 15, and the number of stations of the second tool post 6 is 12. For example, the auxiliary tool post 6 may hold a cutting tool that can not be held by the first main tool rest 4 and may share the processing with the first main tool rest 4 on the work W 1. The auxiliary tool post 6 may have a roller support function or a tail stock function corresponding to the case where the work W1 or the like is long. The auxiliary tool post 6 may be rotatable about an axis in the Y direction, and may perform cutting by inclining the cutting tool T3 with respect to the X direction. Also, the number of cutting tools T3 that can be held by the secondary tool rest 6 may be the same as that of the main tool rest (eg, the first main tool rest 4 and the second main tool rest 5), or more than the main tool rests. It is also good.

  Next, the control device 7 according to the present embodiment will be described. The control device 7 performs control in accordance with processing data that defines the process of the main tool rest (the first main tool rest 4 or the second main tool rest 5) and the process of the sub tool rest 6. The controller 7 controls a first main control unit 31 that controls the first main tool post 4, a second main control unit 32 that controls the second main tool post 5, and a sub control unit 33 that controls the sub tool post 6. And. The first main control unit 31 and the second main control unit 32 are communicably connected to the sub control unit 33, respectively. The controller 7 includes at least one of a controller (not shown) for controlling the first spindle 2, a controller (not shown) for controlling the second spindle 3, and a controller for the loader device (not shown). You may have.

  Here, an example of processing data will be described. The processing data is, for example, NC data used for numerical control. FIG. 2 is a conceptual diagram showing an example of the processing data D1. The processing data is, for example, a program that defines a process, etc., and processing is sequentially performed along the flow, but here, processing data is conceptually represented by table data. The processing data D1 is data in which the contents and the order of each process performed by the first main tool rest 4 and the auxiliary tool rest 6 are determined. The items included in the processing data D1 are, for example, “process number”, “toolhead to be used”, “cutting tool to be used”, “cutting position”, “cutting amount” and the like.

  The “process number” is a number assigned to each process in the order of the process performed first to the process performed later. For example, "Step 2" is performed after "Step 1", and "Step 3" is performed after "Step 2". The “tool rest to be used” is a tool rest which performs cutting processing in each process, and is represented by, for example, an ID assigned to each tool rest. The “cutting tool to be used” is a cutting tool used for cutting in each process, and is represented by, for example, an ID assigned to each station at which the cutting tool is held. The “cutting position” is a position at which cutting is performed in each process, and is represented by, for example, a numerical value corresponding to the coordinate of the cutting tool in the Z direction. The “cutting amount” is a cutting amount in each process, for example, a numerical value corresponding to the X-direction coordinate of the cutting tool at the start of the cutting process, and the X-direction coordinate of the cutting tool at the end of the cutting process Is represented by a numerical value equivalent to

  The first main control unit 31 controls the first main tool rest 4 in accordance with, for example, the processing data D1 of FIG. The first main control unit 31 executes the steps of the first main tool rest 4 in the order defined by the processing data D1. For example, the first main control unit 31 determines which tool post will execute the next process based on the processing data D1. For example, in the process data D1, the “step 1” used in the “process 1” is the “first tool post”, and in this case, the first main control unit 31 performs the next process using the first main tool post 4 Determine to execute. For example, the “cutting tool to be used” of “step 1” is “cutting tool 1 a”, and the first main control unit 31 controls the tool rest driving unit 26 of the first main tool post 4 to “cutting tool 1 a The cutting tool T1 corresponding to "is selected. In addition, the “cutting position” of “step 1” is “Z1a”, and the first main control unit 31 controls the Z drive unit 22 of the first main tool post 4 to “Z1a” the selected cutting tool T1. Place in the position corresponding to Further, the “cutting amount” of “step 1” is “X1a”, and the first main control unit 31 is configured to rotate the first main spindle 2 holding the workpiece W1 with the first main tool post 4 The X drive unit 25 is controlled to move the first main tool rest 4 in the X direction by an amount according to "X1a".

  Each time the process ends, the first main control unit 31 determines which tool post will use the next process based on the processing data D1. For example, in the “process 2” following the “process 1” in the processing data D1, the “toolhead to be used” is the “secondary tool post”, and in this case, the first main control unit 31 It is determined to execute by the platform 6. When it is determined that the next process is to be performed by the secondary tool rest 6, the first main control unit 31 issues a command to start the process of the secondary work rest 6 to the secondary control unit 33. This command designates the “step number” of the next step, and may additionally designate at least one of “cutting tool to be used”, “cutting position”, and “cutting amount”.

  The sub control unit 33 executes the process of the sub tool post 6 in accordance with the command when the sub tool post 6 is in the standby state. The standby state is a state in which the process is not executed, and is, for example, a state for receiving a command, an idle state, or the like. For example, when receiving a command from the first main control unit 31, the sub control unit 33 determines whether the sub tool post 6 is in a standby state. If the sub control unit 33 determines that the sub tool post 6 is in the standby state, the sub control unit 33 executes the process of the sub tool post 6 specified in the command. For example, the "cutting tool to be used" of "step 2" is "cutting tool 3a", and the sub control unit 33 controls the tool rest driving unit 26 of the sub tool post 6, and corresponds to "cutting tool 3a" The cutting tool T3 is selected. Further, the "cutting position" of "step 2" is "Z3a", and the sub control unit 33 controls the Z drive unit 22 of the sub tool post 6, and a position corresponding to the selected cutting tool T3 as "Z3a" Place on In addition, the “cutting amount” of “step 2” is “X3a”, and the sub control unit 33 rotates the first spindle 2 holding the work W 1, and the X drive unit of the sub tool post 6 25 is controlled to move the subsidiary tool rest 6 in the X direction by an amount according to "X3a". Thus, the sub control unit 33 executes the “step 2” of the sub tool post 6. The secondary tool post 6 may acquire at least one of the information on "cutting tool to be used", "cutting position" and "cutting amount" related to "step 2" from the processing data D1, or the first main control unit In the form in which the value of each item is designated in the command issued by the command 31, the information of each item may not be acquired from the processing data D1. The sub control unit 33 sends, to the first main control unit 31, a notification that the process is completed when the process of the sub tool post 6 is completed. Further, when the process of the auxiliary blade stand 6 is completed, the auxiliary control unit 33 puts the auxiliary blade stand 6 in a standby state. Note that at least one of the main control unit (for example, the first main control unit 31 and the second main control unit 32) and the sub control unit 33 may execute a preparation process, a measurement process, etc. in addition to the processing process. Good.

  Next, based on the configuration of the machine tool 1A as described above, the control method according to the present embodiment will be described. FIG. 3 is a flowchart showing an example of a control method according to the present embodiment. Here, according to the processing data D1 shown in FIG. 2, the case where the first main tool rest 4 and the sub tool rest 6 perform cutting processing will be described.

  The secondary cutter rest 6 is in a standby state when a series of processes are started (step S1). In step S2, the first main control unit 31 (represented by "first main tool post control unit" in the figure) executes "step 1" of the first main tool post 4 according to the processing data. The first main tool post 4 ends the “step 1” in step S3. When the first main control unit 31 executes the steps of the first main tool post 4 in the order determined by the processing data, and the order of the steps of the sub tool post 6 comes, “Step 2” is performed in step S4. A command to be started is issued to the sub control unit 33 (represented in the figure as a "sub cutter control unit"). In step S5, the sub control unit 33 receives a command to start "process 2". When the sub control unit 33 receives a command, the sub control unit 33 determines whether to start the process specified by the command. The sub control unit 33 determines to start the process specified by the command when the sub tool post 6 is in the standby state when the command is received. Here, since the secondary cutter rest 6 is in a standby state from step S1, the secondary control unit 33 determines that the process starts, and in step S6, the command is issued as a notification to execute the process specified in the command. A notification indicating that it has been received is sent to the first main control unit 31. The case where the secondary tool rest 6 is not in the standby state when the command is received will be described later with reference to FIG. 7 and the like.

  In step S7, the first main control unit 31 receives a notification that the sub control unit 33 has received a command. In step S8, the sub control unit 33 starts "process 2" of the sub tool post 6 according to the command. In step S9, the secondary cutter rest 6 ends the "process 2". In step S10, the sub control unit 33 sends, to the first main control unit 31, a notification that "the process 2" has ended. In step S11, the sub control unit 33 places the sub tool post 6 in a standby state. In step S12, the first main control unit 31 receives the notification that the “process 2” of the auxiliary tool post 6 has ended. In addition, the first main control unit 31 determines, based on the processing data D1, which tool post will execute the next “process 3”. Here, the “toolhead to be used” of “step 3” in the processing data D1 is the “first main cutter post”, and the first main control unit 31 executes “step 3” by the first main cutter rest 4 It will be determined. The first main control unit 31 starts “process 3” of the first main tool post 4 in step S13. The first main tool post 4 ends the “process 3” in step S14.

  Next, another example of processing data according to the present embodiment and another example of a control method will be described. FIG. 4 is a conceptual view showing another example of processing data. The processing data D2 of FIG. 4 is the same as the processing data D1 of FIG. 2 for “step 1” to “step 3”. The “process 4” of the processing data D2 is a process in which the first main tool rest 4 and the sub tool rest 6 perform cutting in parallel. In the “step 4”, “cutting tool to be used”, “cutting position” and “cutting amount” related to the first main tool post 4, and “cutting tool to be used” and “cutting position” regarding the secondary tool post 6, And "the amount of cutting" is defined. The first main control unit 31 executes the process of the first main tool post 4 of the “process 4” according to the “cutting tool to be used”, the “cutting position”, and the “cutting amount” related to the first main tool post 4 Let In addition, the first main control unit 31 sends a command to start the process of the auxiliary tool post 6 in the “process 4” to the sub control unit 33. The sub control unit 33 starts the process of the sub tool post 6 according to the command when the sub control unit 33 is in the standby state.

  FIG. 5 is a flowchart showing an example of a control method according to the processing data D2. In FIG. 5, since steps S1 to S14 corresponding to "step 1" to "step 3" are the same as those in FIG. 3, the description thereof is omitted. In step S21 following step S14, the first main control unit 31 issues, to the sub control unit 33, a command to start "step 4" of the sub tool post 6. In step S22, the sub control unit 33 receives a command to start "process 4". The sub control unit 33 determines whether or not to start "process 4". The sub control unit 33 determines to start the “process 4” when the sub tool post 6 is in the standby state, and executes the command. The sub control unit 33 determines that the “process 4” is not started when the sub tool post 6 is not in the standby state, and suspends the execution of the command.

  When determining that the “process 4” is to be started, the sub control unit 33 sends, to the first main control unit 31, a notification that the command has been received in step S23. In step S24, the first main control unit 31 receives a notification that the sub control unit 33 has received a command. In response to this notification, the first main control unit 31 advances the first main tool post 4 to the “process 4” next to the previous “process 3”. The first main control unit 31 starts “process 4” of the first main tool post 4 in step S25. In step S26, the first main tool post 4 ends the "step 4". Further, after sending the notification in step S23, the sub control unit 33 starts "process 4" of the sub tool post 6 in step S27. In step S28, the auxiliary tool post 6 ends the "process 4". In step S29, the sub control unit 33 sends the first main control unit 31 a notification that the “process 4” of the sub tool post 6 has ended. In step S30, the first main control unit 31 receives the notification that the “process 4” of the auxiliary tool post 6 has ended.

  Next, another example of processing data according to the present embodiment and another example of a control method will be described. Here, the case where cutting is performed by the first main tool post 4, the second main tool post 5, and the sub tool post 6 will be described. FIG. 6 is a conceptual view showing another example of processing data. The processing data D3 of FIG. 6 (A) defines the step of the first main tool rest 4 and the step of the auxiliary tool rest 6, and is similar to FIG. 2, but the processing data D4 of FIG. 6 (B) In order to distinguish it from the process of (1), the process number is suffixed with "A". The processing data D4 of FIG. 6 (B) defines the process of the second main tool rest 5 and the process of the sub tool rest 6. The respective items are the same as the processing data D3. In FIG. 6B, in order to distinguish it from the process of the processing data D3, the suffix “B” is added to the process number. Similar to the first main control unit 31, the second main control unit 32 controls the second main tool post 5 according to the processing data D4. The second main control unit 32 executes the steps of the second main tool rest 5 in the order defined by the processing data D4. Further, the second main control unit 32 issues a command to start the process of the auxiliary tool post 6 to the auxiliary control unit 33.

  FIG. 7 is a flowchart showing an example of a control method according to the processing data D3 and the processing data D4. Steps S31 to S38 in FIG. 7 are the same as steps S1 to S8 in FIG. The second main control unit 32 (represented by “second tool post control unit” in the drawing) determines a tool post on which the next process is to be performed, based on the processing data D4. For example, in the processing data D4, the “toolhead to be used” of “step 1B” is the “second main cutter post”, and the second main control unit 32 executes the next step using the second main cutter rest 5 judge. The second main control unit 32 starts the “step 1B” of the second main tool post 5 in step S40, and the second main tool post 5 ends the “step 1B” in step S41. The second main control unit 32 determines, based on the processing data D4, a tool post that executes the next process each time the process is completed. For example, in the processing data D4, the “toolhead used” of the “step 2B” following the “step 1B” is the “secondary tool rest”, and the second main control unit 32 Determine to execute. In step S42, the second main control unit 32 issues, to the sub control unit 33, a command for starting the "step 2B" of the sub tool post 6. In step S43, the sub control unit 33 receives a command to start "process 2B". The sub control unit 33 determines whether or not to start the "process 2B". The sub control unit 33 determines that the “step 2B” is started when the sub tool post 6 is in the standby state, and determines that the “step 2 B” is not started when the sub tool post 6 is not in the standby state. Here, since the secondary cutter rest 6 is executing "process 2A" and is not in a standby state, the sub control unit 33 determines that "process 2B" is not started, and starts "process 2B" in step S44. Hold command execution.

  In step S45, the auxiliary tool post 6 ends the "process 2A". In step S46, the sub control unit 33 sends, to the first main control unit 31, a notification that "the process 2A" is completed. The first main control unit 31 proceeds to step S47. The notification that the "process 2A" of the secondary cutter rest 6 has ended is received. In step S48, the first main control unit 31 starts “process 3A” of the first main tool post 4 following “process 2A”. The first main tool post 4 ends the “process 3B” in step S49.

  In addition, in step S50 following step S46, the sub control unit 33 sends, to the second main control unit 32, a notification that the command suspended in step S44 has been received. The sub control unit 33 sends, to the second main control unit 32, a notification that the command has been received, as a notification that the “process 2B” is to be performed. In step S51, the second main control unit 32 receives the notification that the sub control unit 33 has received the command. The sub control unit 33 starts the “process 2B” of the sub tool post 6 in step S52. The secondary cutter rest 2B ends the "step 2B" in step S53. In step S54, the sub control unit 33 sends the first main control unit 31 a notification that "the process 2B" has ended. In step S55, the sub control unit 33 places the sub tool post 6 in a standby state. In step S56, the second main control unit 32 receives the notification that the “step 2B” of the auxiliary tool post 6 has ended. The second main control unit 32 determines which tool post will execute the next process. For example, the “tool rest to be used” in the “step 3B” following the “step 2B” is the “second tool rest”, and the second main control unit 32 controls the second main tool rest 5 in step S57. Start "Step 3B". The second main blade post 5 ends the “step 3B” in step S58.

  In the above embodiment, the control device 7 includes, for example, a computer system. The control device 7 reads a control program stored in a storage unit (not shown), and executes various processes in accordance with the control program. This control program controls the main tool post and the secondary tool post that holds the cutting tool that is held on the main shaft and cuts the rotating workpiece according to the processing data that defines the process of the main tool post and the process of the secondary tool post The program includes a main control program that causes the computer to execute control of the main tool post and a sub control program that causes control of the sub tool post, and the main control program processes the process of the main tool post data Command is issued to the sub control program to start the process of the sub tool post, and the sub control program issues the process of the sub tool post according to the command when the sub tool post is in the standby state. Is executed, and when the process of the auxiliary tool rest is completed, the auxiliary tool rest is put on standby. For example, the main control program is used for each of the first main control unit 31 and the second main control unit 32, and the sub control program is used for the sub control unit 33. The control program may be provided as recorded on a computer readable storage medium.

  Next, a modification is described. FIG. 8A is a view schematically showing a machine tool 1B according to a first modification. The machine tool 1B is a parallel two-axis lathe. In the machine tool 1B, the first main spindle 2 and the second main spindle 3 respectively extend in the Z direction and are disposed apart from each other in the X direction. The first main tool post 4 is, for example, disposed on the −X side with respect to the first main spindle 2. The second main tool post 5 is, for example, disposed on the + X side with respect to the second main spindle 3. The auxiliary tool post 6 is disposed at a position where it is possible to access the work held by the first spindle 2 and the work held by the second spindle 3. The auxiliary tool post 6 is disposed, for example, between the first main spindle 2 and the second main spindle 3 in the X direction. As described above, the present embodiment can be applied not only to the facing two-axis lathe but also to a parallel two-axis lathe or the like. Further, in the present embodiment, the number of the main blade mounts (the first main blade mount 4 and the second main blade mount 5) is two, and the number of the secondary blade mounts 6 is one. The number may be three or more, and the auxiliary tool post may be provided corresponding to three or more main tool posts.

  FIG. 8B is a view schematically showing a machine tool 1C according to a second modification. The machine tool 1C is a single-axis lathe. In the machine tool 1C, the main shaft 35 extends in the Z direction. The main tool rest 36 is, for example, disposed on the −X side with respect to the main shaft 35. The auxiliary tool post 6 is disposed, for example, on the + X side with respect to the main shaft 35. Thus, the present embodiment can be applied to a single-axis lathe or the like in addition to the two-axis lathe.

  The technical scope of the present invention is not limited to the aspect described in the above-described embodiment and the like. One or more of the requirements described in the above embodiments and the like may be omitted. Further, the requirements described in the above-described embodiment and the like can be combined as appropriate.

1A, 1B, 1C ... machine tool, 2 ... main spindle (first main spindle), 3 ... main spindle (second main spindle), 4 ... main tool post (first main tool post), 5 · · · Main tool post (second main tool post), 6 · · · Secondary tool post, 7 · · · Control device, 31 · · · Main control unit (first main control unit), 32 · · · Main Control unit (second main control unit), 33 ... secondary control unit, D1 to D4 ... machining data, T1 to T3 ... cutting tool, W1, W2 ... work

Claims (11)

A control device for controlling a main tool post and a sub tool post that holds a cutting tool that is held by a main shaft and cuts a rotating workpiece according to processing data that defines the process of the main tool post and the process of the sub tool post. ,
A main control unit that controls the main tool post;
And a sub control unit for controlling the sub tool post,
The main control unit executes a process of the main tool post in order, and issues a command to start the process of the sub tool post to the sub control unit.
The sub control unit executes the process of the sub tool according to the command when the sub tool rest is in a standby state, and waits the sub tool rest when the process of the sub tool rest is completed. Control device.   The control device according to claim 1, wherein the sub control unit sends a notification to the effect that the process is to be performed to the main control unit when the sub tool post is to execute a process according to the command.   The control device according to claim 2, wherein the main control unit advances the main tool post to the next process in response to the notification.   The said sub control part sends the notification to the effect of the process completion to the said main control part, when the process of the said sub cutter post according to the said command is complete | finished. Control device described in. A plurality of the spindles are provided,
The main tool post and the main control unit are provided in one-to-one correspondence with the main shaft,
The control device according to any one of claims 1 to 4, wherein the sub tool post and the sub control unit are provided in common to two or more of the main spindles.   The sub-control unit suspends the execution of the command of the process of the sub-toolstock for the work held on the second spindle during the process of the sub-toolrest for the work held on the first spindle. The control device according to claim 5.   The sub control unit executes the command of the sub tool post process for the work held on the second main spindle after the process of the sub tool post for the work held on the first main spindle is completed. The control device according to claim 6.   When the process of the main tool post and the process of the sub tool post are performed in parallel, the start timing of the process of the main tool post and the start timing of the process of the sub tool post are adjusted. The control device according to any one of the above. A spindle that holds and rotates a workpiece,
A main tool post and a sub tool post for holding a cutting tool for cutting the work;
A machine tool comprising: the control device according to any one of claims 1 to 8. A control program for controlling a main tool rest and a sub tool rest that holds a cutting tool that is held by a spindle and cuts a rotating workpiece according to processing data that defines the steps of the main tool rest and the steps of the sub tool rest. ,
A main control program that causes a computer to execute control of the main tool rest, and a sub control program that causes control of the sub tool post;
The main control program causes the process of the main tool post to be executed in order, and issues a command to start the process of the sub tool post to the sub control program.
The sub control program causes the process of the sub tool post to be executed according to the command when the sub tool post is in the standby state, and the sub tool post is in the standby state when the process of the sub tool post is completed. Control program. A control method for controlling a main tool rest and a sub tool rest holding a cutting tool which is held by a main shaft and cuts a rotating workpiece according to processing data defining the process of the main tool rest and the step of the sub tool rest ,
Controlling the main tool rest by a main control unit;
Controlling the secondary cutter with a secondary control unit,
The main control unit executes a process of the main tool post in order, and issues a command to start the process of the sub tool post to the sub control unit.
The sub control unit executes the process of the sub tool according to the command when the sub tool rest is in a standby state, and waits the sub tool rest when the process of the sub tool rest is completed. Control method.

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