JP2005131775A5 - - Google Patents

Description

Machine tool axis control device, machine tool axis control program

The present invention relates to an axis control device for a machine tool and an axis control program used therefor .

Conventionally , as shown in Patent Document 1 , the X axis, the Y axis, and the Z axis linear feed axes, and the axes parallel to the two linear feed axes selected from these three linear feed axes, control and two rotational feed axes serving the a-axis · B axis direction, the six-axis NC machine tool having a rotary feed shaft serving C-axis direction which rotates about its axis the axis of the spindle for rotation about In order to do this , there is a 6-axis control program using a 5-axis control program, but there is a drawback that it is very difficult to generate the program and it is difficult to use it easily.

In addition, the automatic tool changer disclosed in Patent Document 2 determines whether or not the spindle is in the interference area when changing the tool. If it is determined that the spindle is not in the interference area, the automatic tool changer moves to the tool change start position of the spindle. which was provided with a control device to output an instruction to perform indexing of the movement the tool magazine simultaneously, shorten the cycle time at the same time by operating the a-axis · B axis while the ATC (automatic tool changer) operation I can't let you.

In NC part program, when an attempt to perform the A axis, B axis and ATC operates with a second auxiliary function is the so-called B code, the amount of movement of A axis, the movement amount of the B-axis, combined shaft If you choose to code the following: However, this method has a drawback that the cycle time becomes long because four blocks are required for the operation.
B100;
B200;
B3;
T01 M17 M76;

JP 2003-5811 A JP 2000-126965 A

An object of the present invention has been made in view of these shortcomings, the reference axis of the machine tool A shaft · B axis to various operations and concurrent operation or the machine tool side (X-axis, Y-axis, the means that the Z-axis) An axis control device for a machine tool that shortens the cycle time by operating the machine.

An axis control device for a machine tool according to the present invention includes a PMC (Programmable Machine Controller) for controlling a machine tool, an X axis, a Y axis, a Z axis that are machine tool reference axes, and an A axis and a B axis that are rotary axes. An axis control device for a machine tool, comprising a memory storing a program for controlling the machine and an NC (Numerical Control) axis control unit for controlling a reference axis and a rotation axis according to the program. And a PMC axis control unit for controlling the A axis and the B axis. The program has A-axis control data, B-axis control data, and axis designation data as one command block data. When the axis designation data of the command block data is read by the PMC by executing the program, the control right of the A axis and B axis control is switched from the NC axis control unit side to the PMC axis control unit side, and the control of the PMC axis control unit is performed. The axis designated by the axis designation data is controlled, and the reference axis is controlled under the control of the NC axis control unit in parallel with the axis control. When the control operation of the axis designated by the axis designation data is completed, the control right is returned from the PMC axis control unit side to the NC axis control unit side.

Thus, control of the A-axis · B axis of the machine tool disconnected from the NC axis control unit side, by switching to the PMC axis control portion, while operating the A-axis · B axis PMC side, parallel to this since various operations of the reference axis or machine tool is carried out in the NC side and can reduce cycle time.

An axis control program for a machine tool according to the present invention includes a PMC (Programmable Machine Controller) that controls a machine tool, an X axis, a Y axis, a Z axis that are reference axes of the machine tool, and an A axis and a B axis that are rotation axes. Is a program for operating an axis control device of a machine tool including an NC (Numerical Control) axis control unit that controls the AMC and a PMC axis control unit that controls the A axis and the B axis under the control of the PMC. Thus, the A axis control data, the B axis control data, and the axis designation data are included as one command block data, and the axis control device is caused to execute the following steps.
(A) When the axis designation data of the command block data is read by the PMC, the control right of the axis control of the A axis and the B axis is switched from the NC axis control unit side to the PMC axis control unit side.
(B) A step of controlling the axis designated by the axis designation data under the control of the PMC axis control unit.
(C) A step of controlling the reference axis under the control of the NC axis control unit in parallel with the axis control of step (b).
(D) A step of returning the control right from the PMC axis control unit side to the NC axis control unit side when the control operation of the axis designated by the axis designation data is completed.

According to the present invention, by switching the axis control of the A axis and the B axis from the NC axis control to the PMC axis control , the axis control can be performed on the PMC side. it is possible to operate simultaneously in various operations and the parallel line of machine tools, can be shortened the cycle time of the entire apparatus. Moreover, because of the the A-axis control data and B-axis control data and the shaft specified data and a command block data, can be easily & easily programmed a descriptive command of the A-axis-B-axis in a single block.

Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 6 and FIG.

The system shown in FIG. 6, MDI and (manual data input unit) 61, a memory 62 for storing programs and data, a display unit 63 for displaying various data and the like, PMC for controlling a machine tool (Programmable Machine Controller) 64 When a shaft controller 65 for controlling the axes, a CPU control unit 67 which controls each section.

When call executes a corresponding program in MDI61, call the NC part program by the CPU controller 67 is stored in the memory 62, and stores the control data in the memory 62, and the axis control unit via the PMC64 exchanges of data 65 The axis is controlled by

FIG. 2 shows an X-axis, Y-axis and Z-axis (NC reference axis) of the main axis, two axes of A-axis and B-axis, and an NC part program (hereinafter simply referred to as “program”) for controlling the ATC operation. An example of The A axis is the rotation axis of the tilt table, and the B axis is the rotation axis of the turning table. Hereinafter, the function of the program will be described with reference numerals.

1 Z300.0; in the block, a function to release the Z-axis in a region that does not interfere with the A axis · B axis.

2 G401A100.0B200.0Q3T01M17; called in block, macro program 3 (name O9013). The code G401 is set in the parameter to indicate that the macro program 3 is called. The block 2, performs the setting of the movement command value of the A-axis and B-axis, the reference axis (X axis, Y axis, Z axis) and ATC operation and concurrent with the A-axis · B axis simultaneous operation It has a function of designating a combination of axes. The movement command value for the A axis is stored in the variable # 1, and the movement command value for the B axis is stored in the variable # 2. The argument of address Q is stored in variable # 17.

Address Q, the reference axis (X axis, Y axis, Z axis) operating with parallel rows, separately from the NC side ability to specify an axis simultaneous operation by axis control of PMC side, with the meaning of the following Yes.
Q = 1: control of the A-axis is switched from the NC side PMC side, to operate the A-axis in the axis control of PMC side.
Q = 2: switching control of the B-axis from the NC side PMC side, to operate the B-axis in the axis control of PMC side.
Q = 3: The control right of the A axis and the B axis is switched from the NC side to the PMC side, and the A axis and the B axis are operated by the PMC side axis control.

Tool number 01 argument address T shown in T01M17, the argument 17 of the address M, described later variable # 20, and stores and # 13. M17 is a tool return preparation command by axis control on the PMC side .

The A-axis or B-axis , or the A-axis / B-axis starts operation in response to a block command indicated by reference numeral 9.

4 G91G30X0Y0Z0; in the block, the reference axis (X axis, Y axis, Z axis) is a function to move to the ATC tool change position. 5 M06; in the block, the operation start command ATC tool change function.

In the macro program 3, 6 is a block of # 140 = # 1 , 7 is a block of # 141 = # 2, and the variable # 1 in which the movement command value of the A axis is stored and the movement command value of the B axis are stored. Stored variable # 2 is stored in common variables # 140 and # 141, respectively.

8 # 143 = # 17; in the block, storing the axis specified to operate at PMC side of the axis control is switched from the axis control NC side, or PMC axis control operation Confirmation axis assignment to perform (argument address Q) To do.

9 T # 20M # 13M76; in the block, the variable # 20 and tool number (01) is stored, magazines Address T to direct the tool selection operation to rotate. The variable # 13 stores a numerical value 17, and in M17, a tool return preparation command is performed by axis control on the PMC side .

A code M76 is an auxiliary function, and is a window activation means for activating a window function that takes charge of an interface function between the NC side and the PMC side.

If the window function is activated by the window activation means M76, PMC side reads in the control data of the A and B axes, read data Q of the common variable # 143. When the address Q is a numerical value 1 to 3, for example , when the common variable # 143 = 3, the axis control right is switched from the NC side to the PMC side, and the two axes A and B are controlled by the PMC side axis control . ATC operation and co-operation and the tool number 01 are performed in parallel.

Reference numeral 10 denotes a block of M99; which is a function for returning to the main program and executing the next block.

Then, 11 G401A100.0B200.0Q19; in the block, A-axis by calling a macro program 3, the position of the B axis per whether becomes equal to the movement command value, A shaft position control the current position of the B axis To confirm the completion of the PMC axis control operation. The axis designated to perform the PMC axis control operation completion confirmation is performed in the address Q as described above. Since the argument of Q is the numerical value 19, the numerical value 19 is stored in the variable # 17. By executing the M76 code, the common variable # 143 = 19 is read on the PMC side, and the command operation positions (G401A100.0B200.0) of the A axis and the B axis are confirmed. Equal the current position of the A axis as the common variable # 140, A-axis as the current position of the B axis is time equal to the common variable # 141, completion confirmation of concurrent processing of ATC operations and A-axis · B-axis moving operation is completed control of · B axis to return to the NC side.

The movement command value A100.0, B200.0 commands operation Confirmation position A axis · B axis absolute value, respectively. The meaning of the address Q is as follows.
Q = 17: A-axis PMC axis control operation completion confirmation Q = 18: B-axis PMC axis control operation completion confirmation Q = 19: A-axis / B-axis PMC axis control operation completion confirmation

On the assumption above description of the program, Fig. 1, further illustrating the axial control of the present invention in detail with reference to FIG.

In FIG. 1, 12 is a memory in which an A-axis movement command value (absolute value) 100.0 is stored. 13 is a memory B axis movement command value (absolute value) 200.0 are stored. 14 is a memory that memory argument address Q 1 to 3 (the axis designated in the PMC side) is stored or PMC axis control operation Confirmation specified argument 17-19 address Q is stored. 15 is a memory that ATC tool number and tool return preparation command argument address M is stored. Reference numeral 18 denotes memory means constituting the memory for these data.

In FIG. 1, the NC control unit 50 (FIG. 3) is schematically illustrated so that the exchange of data can be easily understood, but the NC control unit 50 (FIG. 3) includes an I / O interface 25 that controls the A axis and the B axis, and a PMC 28 (FIG. and 6 PMC64 of), X, Y, and NC axis control section 19 for controlling the NC reference axis and a-axis · B axis and ATC operation of the Z-axis, the PMC interface 20, CPU control unit which controls the respective parts 21 (CPU control unit 67 in FIG. 6), in addition to this, the memory 62 shown in FIG. 6 (including the memory means 18 in FIG. 3), the MDI 61 as input / output means for various data, and the display 63 .

The PMC interface 20 includes an auxiliary function M76 and the window functions and interfaces for activating the window function, to handshake command block data between the NC side and PMC side.

Referring to FIG. 1, the data configuration and operation of the program will be described in model form. The program execution unit 16 reads and executes each block 1 to 11 of the program of FIG. 2 stored in the memory 62 (FIG. 6). As described above, the A-axis control data and B-axis control data and the shaft specifying data, stored in the memory 12 to 14 of the memory unit 18. The ATC tool return command preparation data 15 is output to the PMC 28 via the PMC interface 20 .

These data, i.e., A-axis data 12, B-axis data 13, the axis designation data 14 and ATC of the tool return command preparation data 15, that make up a single instruction block data 17 as an operation command. By executing the command block data 17, A-axis control unit 23, B-axis control section 24, ATC controller 27, A-axis control, respectively, B-axis control, performs the ATC operation.

  The program execution unit 16 executes the NC side (reference axis) operation block indicated by reference numerals 4 and 5 shown in FIG. 2 or reference numerals 48 and 49 shown in FIG.

The program execution unit 16 is based on the command block data 26 (FIG. 1) constituting one block as an operation command composed of the A / B axis movement operation (A100.0B200.0) and the operation completion confirmation data (address Q) . , a axis, after the start of operation of the B-axis, to determine whether the a-axis, the current position of the B axis is equal to the movement command value of the a-axis · B axis movement (A100.0B200.0), PMC axis control to confirm the operation is completed.

Thus, the onset Ming, A axis, have rows the operation of the operation start and concurrent to NC side of the B-axis, it is characterized in that enable easy confirmation of the start and end in the NC part program.

As described above, A axis, after execution of the command block data 17 for the operation of the B-axis (reference numeral 2 in FIG. 2), to perform the N C side reference axial driving operation N5 moves to the next block (FIG. 2 4 and 5). That is, the X axis, the Y axis, and the Z axis move to the ATC tool change position, and the ATC tool change operation is performed. Then, A-axis, the operation Confirmation of B-axis is carried out by execution of one command block data 26 as operation command (reference numeral 11 in FIG. 2).

A shaft according to directives block data 17, operation start and B-axis, A-axis by the command block data 26, with the completion acknowledged the B-axis, as indicated by block N5 (Fig. 1), the reference axis of the NC side the movement of the ATC position of a tool change by the ATC operation is carried out.

The block configuration shown in FIG. 1 can be summarized as shown in FIG. The NC control unit 50 includes a CPU control unit 21 , a PMC interface 20, a PMC axis control unit 22 , an I / O interface 25, an NC axis control unit 19 and a PMC 28. The PMC 28 includes a PMC ladder control unit 29 . CPU control unit 21 executes a block indicated by the reference numeral 1 to 11 before Symbol program content.

Program shown in FIG. 2 is being executed read by the program execution unit 16, various data of the code 2 is stored in the memory unit 18. Actually, the CPU control unit 21 performs this operation .

And have you to determine 30 of FIG. 3, PMC ladder control unit 29 from the value of the address Q, A axis, determines whether to control the B axis PMC axis control unit 22. If YES, the via PMC axis control unit 22, I / O interface 25, the A-axis control unit 23, B axis control unit 2 4, and drives the motor 31-1 and 31-2, respectively. Incidentally, ATC operation, the execution of the code M06 indicated at 5 in FIG. 2 are performed by PMC axis control unit 22.

When the auxiliary function M76 (reference numeral 9 in FIG. 2) is output, when the common variable # 143 is Q = 3 (binary number “00011”) , that is, when the designated axes are the A axis and the B axis. This will be described with reference to the flowchart of FIG .

If the auxiliary function M76 is not being output in the decision 33 , the process proceeds to END44. If the auxiliary function M76 is being output in the determination 33 (YES), the PMC side reads the argument of the address Q stored in the common variable # 143 in the determination 34 (# 143 AND16 = 0), and performs bit verification with a binary number. Determine whether the operation is complete or the axis is moving. Since the 5th bit is 0 (axis operation) , the determination at 34 is YES , and the 1st bit is bit-checked based on whether or not the A axis is selected in the determination 35 (# 143AND1 ≠ 0). Since the first bit is 1, determination at 35 is YES, the switching control of the A-axis on the PMC axis control unit 22 side in the process 36, to begin the movement command of the A-axis. If the first bit is 0 (no A-axis), the determination at 35 is NO, and the process proceeds to the next determination 37 without executing the process 36.

Next , in the determination 37 (# 143 AND2 ≠ 0) , the second bit is bit-checked as to whether or not the B axis is selected. Since the second bit is 1, determination at 37 is YES, the process 38 switches the control of the B-axis to the PMC axis control unit 22 side, starts movement command B-axis. Also, the completion signal (FIN) of M76 is immediately returned, and the process proceeds to END44. If the second bit is 0 (no B-axis), the determination at 37 is NO, and the process proceeds to the next END 44 without executing the process 38.

Next , a case where the common variable # 143 is Q = 19 (“10011” in binary) , that is, a case where the operation completion confirmation of the A axis and the B axis is performed will be described.

5th bit So 1 (completion acknowledged), judgment is NO, at 34, moves Ri to decision 39 (# 143AND1 ≠ 0), A shaft per whether completion acknowledged or target, bits match. Since the first bit is 1 , the determination result in 39 is YES , and in determination 40, it is checked whether the AMC axis control operation by the PMC axis control unit 22 is completed. If the operation has not been completed , the determination result at 40 is NO and the process proceeds to END44. If the operation completion, Ri moves to decision 41 (# 143AND2 ≠ 0), B axis per whether operation Confirmation of target bits match. Since the second bit is 1 , the determination result in 41 is YES , and in determination 42, it is checked whether the operation of the B axis control by the PMC axis control unit 22 is completed. If the operation is not completed , the determination result at 42 is NO , and the process proceeds to END44. If the operation is completed, the control right processing 43 returns to the NC axis from PMC axis, return completion signal of the auxiliary function M76 to (FIN).

Figure 5 illustrates a NC part program according to another embodiment. The same blocks as those shown in FIG. 2 are denoted by the same reference numerals.

Reference numeral 45 indicates a block of G401A100.0B200.0Q3; the A / B axis movement command value is set, the axis is designated, the macro program 46 is called, and the auxiliary function M76 is executed by reference 47 as described above. Starts the operation of the A-axis and B-axis, and returns to the main program in M99. Moving to the next block, while the A-axis and B-axis are moving, the NC side functions of the codes M32 (example: execution of closing of the door) 48 and M08 (example: coolant discharge) 49 are performed. Next , block 11 is executed in the same manner as described above.

Thus, during the block of code 2 and code 11 described in FIG. 2, or NC side the functions between the blocks of code 45 and code 11 of Figure 5 operates, A shaft · B axis starts operation after NC side function is executed, concurrent processing can be performed easily. Wait control is eliminated by concurrent processing based on this structure can be shortened compared with the prior art cycle time.

It is a block block diagram for demonstrating operation | movement of one Embodiment of this invention . Is a diagram illustrating the NC part program of an embodiment of the present invention. It is a circuit block diagram for demonstrating operation | movement of one Embodiment of this invention . It is a flowchart for demonstrating operation | movement of one Embodiment of this invention . Is a diagram illustrating an NC part program according to another embodiment of the present invention. It is a figure explaining the outline | summary of a system .

Explanation of symbols

1 ~ 11 ... NC part program of the coding blocks 12-15 constitute the ... command block data data 16 ... program executing portion 17 ... command block data 18 ... memory means 19 ... NC Axis control unit 20 ... PMC interface 21 ... CPU control unit 22 ... PMC axis control unit 23 ... A axis control unit 24 ... B axis control unit 25 ... I / O interface 26. ..Command block data 27 ... ATC control unit 28 ... PMC
29 ... PMC ladder control unit 31 ... Drive motor 32 ... Z-axis
50 ... NC control unit N5 ... Operation of NC functions

Claims (2)

PMC (Programmable Machine Controller) for controlling machine tools,
A memory storing a program for controlling the X axis, the Y axis, the Z axis, and the A axis, which is the rotation axis, and the B axis, which are reference axes of the machine tool;
In an axis control device for a machine tool comprising an NC (Numerical Control) axis control unit that controls the reference axis and the rotation axis according to the program,
A PMC axis control unit for controlling the A axis and the B axis under the control of the PMC;
The program has A-axis control data, B-axis control data, and axis designation data as one command block data,
When the axis designation data of the command block data is read by the PMC by the execution of the program, the control right of the axis control of the A axis and the B axis is switched from the NC axis control unit side to the PMC axis control unit side, and the PMC axis While controlling the axis designated by the axis designation data under the control of the control unit, the reference axis is controlled under the control of the NC axis control unit in parallel with the axis control,
An axis control device for a machine tool, wherein when the control operation of the axis designated by the axis designation data is completed, the control right is returned from the PMC axis control unit side to the NC axis control unit side. A PMC (Programmable Machine Controller) that controls the machine tool, and an NC (Numerical) that controls the X-axis, Y-axis, Z-axis, and the A-axis and B-axis that are the rotation axes of the machine tool.
Control) is a program for operating an axis control device for a machine tool including an axis control unit and a PMC axis control unit that controls the A axis and the B axis under the control of the PMC. An axis control program for a machine tool having control data, B axis control data, and axis designation data as one command block data, and causing the axis control device to execute the following steps.
(A) When the axis designation data of the command block data is read by the PMC, the control right of the axis control of the A axis and the B axis is switched from the NC axis control unit side to the PMC axis control unit side.
(B) A step of controlling the axis designated by the axis designation data under the control of the PMC axis control unit.
(C) A step of controlling the reference axis under the control of the NC axis control unit in parallel with the axis control of the step (b).
(D) A step of returning the control right from the PMC axis control unit side to the NC axis control unit side when the control operation of the axis designated by the axis designation data is completed.