JPH0215947A - Processing machine - Google Patents

Abstract

PURPOSE:To ensure the prevention of an overstroke by judging the occurrence thereof based upon whether the end of a shift instruction is included in the allowable range of a shift set up in the processing range of a pallet evaluated as a processing object. CONSTITUTION:According to a signal for a left-side pallet, for example, a pallet 23L as a processing object moves from a preparation table 14, and judgement is made as to whether the end of a shift instruction calculated from a machine datum and the like is included in the allowable shift range of a column on a column base 2 preliminarily set up in a clamped processing range 22L. If the end of a shift is included therein, an overstroke is judged as existing, thereby stopping the motion of a pallet. Also, similar processing is made for a signal for a right-side pallet. According to the aforesaid construction, it is possible to prevent simply and properly an overstroke for a shift from a working process range to another range in a processing machine having a plurality of processing ranges and a pallet for each processing range.

Description

Detailed Description of the Invention "Industrial Field of Application J The present invention relates to a processing machine having a plurality of processing areas and a pallet provided for each processing area, and in particular, a set processing area is connected to a column having a processing tool. It is possible to prevent so-called stroke over, in which the stroke deviates from each other, in each set machining area.

"Prior art" In numerical control of processing machines, machine tools, etc., when a machine movement command is analyzed and it is determined that the end point of the command exceeds the permissible movement range within the set machining area, the A technique that prevents the execution of movement commands has already been proposed as a "stroke over detection method" (Japanese Patent Publication No. 5
No. 9-47322).

[Problems to be Solved by the Invention] However, in the above method, only a single range can be set as the allowable movement range of the machine, and the purpose is to detect stroke over within that range. Ta. For this reason, pallets are provided for each multiple processing area, and
To prevent stroke overs from invading other machining areas when machining each pallet, set a common movement tolerance within the maximum machining area of multiple machining areas, or set a common movement tolerance range for each pallet. Before starting machining, it was necessary to reset the allowable movement range for the machining area of each pallet.

In the former case, even if there is a mistake in creating the Canadian program,
If the stroke is within the maximum machining area, overstroke will not be detected, and there is a risk that it will invade other machining areas, so it is not completely secure. Furthermore, as in the latter case, resetting the allowable movement range for the processing area is not only very time consuming and poor in workability, but also has problems that need to be solved, such as being prone to setting errors.

The present invention has been made in order to solve the above-mentioned problems, and is a processing machine that is capable of determining stroke over of a column movement command for each permissible movement range of a plurality of set processing areas and preventing its execution. The purpose is to provide the following.

"Means for Solving the Problem" Specific means for achieving the above purpose include a column that has a processing tool and is movable within and between a plurality of set processing areas; A processing machine in which a pallet movable between a forward position and a retracted position outside the processing area is provided in each of the processing areas, an input means for inputting various commands, a calculation unit for analyzing the input commands, A storage means for storing necessary information, a setting means for setting an allowable movement range of the column for each of the plurality of machining areas in the storage means, and a discriminating means for determining a pallet to be machined clamped at an advanced position in the machining area. and stroke over determination means for determining whether the end point of the movement command for the column is included within the permissible movement range set in the machining area of the determined pallet to be machined; The present invention is characterized in that it is provided with a blocking means for blocking the execution of the movement command when the movement command is executed.

According to the specific means, the permissible movement range of the column is set for each of the plurality of machining areas, and when there is a column movement command, the command is applied to any of the plurality of machining areas. A stroke over is determined based on whether the end point of the movement agitation command is included within the permissible movement range set for the determined machining area, and in the case of a stroke over, execution of the movement command is blocked.

"Example" An embodiment of the present invention will be described based on the accompanying drawings.

Fig. 1 is a front view of the processing machine of the present invention, and Fig. 2 is a side view of the same, and the pallet loading/unloading mechanism 21 is indicated by a chain double-dashed line in order to explain it in more detail in Fig. 3.4 later. This is an indication.

A column base 2 is provided on the base l so as to be slidable in the lateral direction (X-axis direction), and a column 3 is provided on the column base 2 so as to be slidable in the front-rear direction (Y-axis direction). A spindle head 4 is mounted so as to be slidable in the vertical direction (Z-axis direction). The column base 2 is driven by an X-axis motor 5, the column 3 by a Y-axis motor 6, and the main shaft head 4 by a Z-axis motor 7. The spindle head 4 is provided with a spindle 9 that is rotationally driven by a spindle motor 8, and is also equipped with a rotary magazine type automatic tool changing device 10. Furthermore, a fixed table 13 and a setup table 14 are fixed to the table portion 12 on the front side of the base 1. Mounting plate 15 on the back of fixed table 13
On the left and right sides of the column base 2 are overrun limit switches Ls-X for regulating overrun of the column base 2 in the X-axis direction.
and Ls+X are arranged, and two dogs 16 and 17 arranged at different positions in the Z direction are fixed. At the center of the front surface of the column base 2, there are dogs 18 corresponding to the overrun limit switches Ls-X and Ls+X in order from the top.
Limit switches LsR and LsL are provided corresponding to the dogs 16 and 17, respectively. The limit switch L
sR and LsL are used to detect movement of the column base 2 within two left and right machining areas, which will be described later.

Overrun limit switches Ls-Y and Ls+Y for regulating overrun of the column 3 in the Y-axis direction are arranged on the upper surface of the right end of the column base 2, and a limit switch LsYK is arranged inside the limit switch Ls+Y. , a dog 19 corresponding to each of these limit switches Ls-Y, Ls+Y, and LsYK is fixed to the right side of the column 3.

The limit switch LsYK is turned on at a position where the main shaft 9 is removed from the upper surface of the fixed table 13 in the +YY axis direction.

Further, overrun limit switches Ls-Z and Ls+Z for regulating overrun of the spindle head 4 in the Z-axis direction are arranged on the right side of the column 3, and the limit switch Ls
A limit switch LsZK is arranged below +Z, and each of these limit switches Ls-Z, Ls+Z and LsZ
A dog 20 corresponding to K is fixed to the spindle head 4. This limit switch LsZK is turned on when the spindle head 4 is in an upwardly retracted position in the +Z-axis direction.

FIG. 3 is a plan view of the pallet loading/unloading machine f1121.

The upper surface of the fixed table 13 fixed to the table portion 12 forms a processing area 22 of the processing machine, and two left and right processing areas 22L and 22R are set therein.

For the two left and right machining areas 22L and 22R, the two pallets 23L and 23R are moved to the setup table 14, which is in the forward position within the machining area and in the retracted position outside the machining area, respectively.
It is provided so that it can be moved between.

This movement is performed by the pallet loading/unloading machine $1121, and by reciprocating the rotating air cylinder 24 of this machine [21 within a certain angle, one end is fixed to the rotating air cylinder 24 and the roller 25 attached to the other end is moved. Pallet 23L, 23
This is carried out by pushing and pulling L-shaped arms 27L and 27R fitted into a guide member 26 fixed to the front side of H. Pallet 23L.

23R is guided by a roller guide 28 installed between the forward and backward positions, and a roller 29 whose upper surface is provided on the lower surface of the pallets 23L and 23H rolls. The arrival of pallets 23L and 23R at the forward and backward positions is LsL4. LsL-2 and LsR-1
, LsR-2.

In addition, on the front side of the killing table 14, there are activation buttons 30L and 30R1 for the left and right pallets 23L and 23H.
Emergency stop buttons 31L, 31R and an automatic/single-action mode changeover switch 32 are arranged.

For the pallets 23L and 23H, setup is performed such as placing unprocessed workpieces on the setup table 14, which is in the retreat position, and removing processed workpieces.
At the forward position, each pallet carried in is clamped or unclamped.

FIG. 4 is an enlarged front view showing the pallet in a clamped and unclamped state with different cutting positions.

In the figure, pallet 23L is in a clamped state, and pallet 23R is in an unclamped state.

An air cylinder 4 for clamping is installed on the fixed table 13 corresponding to the center position of the left and right processing areas 22L and 22R.
1 is fixed respectively. Piston 4 of air cylinder 41
A clamper 43 is fixed to the upper end of 2. The upper surface position of the clamper 43 in the unclamped state is
8, and the rollers 29 of the pallets 23L and 23R rolling on the guide 28 are directly connected to the clamper 43.
It rolls upward and stops the pallets 23L and 23R at the forward position.

Clampers 43 are installed on the lower surfaces of both sides of the pallets 23L and 23R.
A clamp plate 44 facing at a distance l is fixed to the lower surface of the
It corresponds to the clamp base 45 disposed on the fixed table 13. On the front side of the clamper 43, a dog pin 46 is fixed vertically downward, two dogs 47 and 48 are fixed at the lower end, and a limit switch Ls corresponding to the dog 47 detects the unclamped state of the pallet. A limit switch L s R-4 is provided corresponding to the dog 48 to detect the clamped state of the pallet. Left dog pin 46. Dog 47.48 and limit switch L
Although not shown in the drawings for s L-3 and L s L-4, the same mechanism is provided on the left and right sides.

In addition, positioning pins 49 are erected on the fixed table 13 and correspond to positioning holes 50 formed on the lower surfaces of the pallets 23L and 23H. The clamp base 45 is equipped with an air blower! (not shown) blows out pressurized air to prevent the adhesion of chips, cutting fluid, etc.

The clamping operation of the pallets 23L and 23R in the forward position is performed as follows.

First, when the piston 42 of the air cylinder 41 descends,
Pallet 23L (23R) placed on the top surface of the clamper 43
continues to move downward together with the clamper 43, and the positioning pin 4
9 and the positioning hole 50, and when the clamp plate 44 is placed on the clamp base 45, the downward movement is stopped, and the clamper 43 is further moved downward by the distance l, and is placed on the upper surface of the clamp plate 44. Clamping pressure is applied to firmly clamp the piston 42, and at the same time, the dog 48 operates the limit switch LsL-4 (LsR-4) to stop the downward movement of the piston 42 and detect the clamped state. Further, unclamping of the pallet 23L (23R) is performed by the reverse operation as described above, and the limit switch LsL-3 (LsR-3) is operated by the dog 47,
The lifting of the piston 42 is stopped and an unclamped state is detected.

Clamping the pallets 23L and 23R in the forward position;
Controls such as unclamping, carrying to the forward position, and discharging to the backward position are performed by a pneumatic circuit (not shown), and based on detection signals from the aforementioned limit switches, etc., the rotating air cylinders 24, 24, clamping Air cylinder 41.
Solenoid valve SOL L-1 that switches the pneumatic circuit to 41
~5OLL-3, and solenoid valves 5OLR-1~5OLR-
3, etc. (as shown in the block diagram of FIG. 6).

FIG. 5 is an explanatory diagram illustrating the machining area 22 set on the fixed table 13 of this machine tool.

The processing area 22 includes left and right processing areas 22L and 22R.
is set, and the permissible movement range of the column 3 is set for each of the processing areas 22L and 22R as shown in the figure using x-y plane coordinates. Each coordinate value xL-~X114. YL, -
〜Y, , C, It is stored in a storage device etc. as a control parameter for the processing machine.

The permissible movement range can also be set in the cannibal program or by inputting it as control data using an operation box or the like. Based on this allowable movement range, a stroke over of a movement command, which will be described later, is determined.

A machining origin is determined for each of the machining bullets 23L and 23R carried into the set machining areas 22L and 22R, and a cutting program is created based on this machining origin.

By using one of the machining origins as a reference machining origin, finding the offset amount with other machining origins, and uniformly adding or subtracting that offset amount in the machine program,
It is also possible to shift the machining origin to the reference machining origin and execute the same machining program at 22L and 22R in each machining area.

Next, the outline of the control circuit of this processing machine will be explained with reference to the block diagram of FIG.

The control circuit is a CPU that mainly controls the processing operations of the processing machine.
100, loading and unloading of pallets, starting processing machines,
It is mainly composed of a sequencer 200 that performs control such as stopping.

An operation box 101 is connected to the CPU 100. The operation box 101 includes a CRT display 102 and operation switches 103 for inputting various data. In addition, a relay control circuit 104 is connected and receives a relay signal from the CPU 100 to control magnet relays MCX, MCY, MC.
Z and MC8 operate, and the X, Y, Z and main shaft motor drivers 105 to 108 are powered on. driver 10
For the X-axis motors 5 to 108, a movement command signal is output from cpuioo according to the Kani program, and the X-axis motors 5. Y
The rotation of the shaft motor 6, the Z-axis upper motor 7, and the main shaft motor 8 is controlled. The CPU 100 includes a RAM 109 in which various programs and processing data are stored, and a C.
ROMll in which the control program of PU 100 is stored
0 is connected.

overrun limit switches Ls-X, Ls+X, which respectively restrict overruns in the X-axis direction of the column base 2, the Y-axis direction of the column 3, and the two-axis directions of the spindle head 4;
An overrun regulation signal circuit 111 in which Ls-Y, Ls+Y, Ls-Z, and Ls+Z are interposed, and an emergency stop signal circuit 112 connected to the circuit 111 are connected to the CPU 100.

The emergency stop signal circuit 112 includes two relay contact circuits 114 and 115 between a limit switch circuit 113 in which limit switches LsL and LsR are inserted in series to detect movement of the column base 2 in the processing area 22L and 22R.
are provided, cross in the center in the shape of a cross, and both ends thereof serve as switching contacts for the limit switches LsL and LsR, and the limit switch circuit 113 is provided with a manual stop button 31L for the left and right machining areas 22L, 22R.

31R is inserted in series. Relay contact circuit 1
14 is a relay contact whose contact is closed by a relay CRL in which is activated by a left pallet signal (hereinafter referred to as a Lin signal) output from the sequencer 200 to the CPU 100, and a relay CRRin which is activated by a right pallet signal (hereinafter referred to as a Rin signal). A relay contact that opens the contact is inserted in series.

Further, the relay contact circuit 115 is formed by interposing in series a relay contact whose contact is opened by a relay CRRin which is similarly operated by a Rin signal, and a relay contact whose contact is opened by a relay CRLin which is operated by a Lin signal. Rin signal,
The Lin signal will be described later.

The emergency stop signal circuit 112 includes the limit switch L.
Inter-processing area movable signal circuits 116 in which sYK and LsZK are inserted in series are connected in parallel. When the limit switches LsYK and LsZK are turned on by the circuit 116, that is, the column 3 moves in the +YY axis direction from the front side to the back side, the spindle 9 comes off the top surface of the fixed table 13, and the spindle head 4 moves to the +2 axis. When it is in the upward retracted position in the direction and is in the position where it can move between processing areas, the emergency stop signal circuit 1
12 is activated, or even when the column base 2 is in the central position where the limit switches LsL and LsR are not turned on at the same time, it is possible to move between the processing areas 22L and 22R.

The emergency stop signal circuit 112 always switches the relay contact circuits 114 and 115 because one of the limit switches LsL and LsR is turned on and switches the contact when the column base 2 is moved into either the left or right machining area. One side is wired and interlocked.

The emergency stop signal circuit 112 detects when (1) the limit switch LsL or LsR is turned off and the movement detection signal of the column base 2 within the processing area is not detected when attempting to move from the processing area currently being processed to another processing area; , (2) When the sequencer 200 malfunctions and the Rin signal and Lin signal are output at the same time, (3) The limit switch LsL or L
Activates when sR is turned off due to disconnection, misalignment, failure, etc., or when manual stop button 31L, 31R is pressed.
An emergency stop signal is output to the CPU 100, the CPU 100 turns off the relay signal to the relay control circuit 104, and the magnet)! J Ray MCX, MCY, MCZ and MC3 are inactive, and the X, Y, Z and main shaft motor drivers 105
- 108 is turned off, and the dynamic brake is applied to stop the motors of each axis.

Pallets 23L and 2 for each processing area 22L and 22R
A manual button circuit 201 and a limit switch circuit 202 are connected to a sequencer 200 that controls the loading and unloading of 3R.

The manual button circuit 201 connects the left and right pallets 23L, 23
It consists of a mode switching circuit in which an automatic/single action mode changeover switch 32 for R is inserted, and a starting circuit in which a left starting button 30L and a right starting button 30R are inserted, respectively.

The limit switch circuit 202 is connected to the left and right pallets) 23L.
, 23H, the limit switch LsL-1 detects the carrying into the forward position of each processing area 22L, 22R, clamping at the forward position, unclamping, and discharge from the forward position.
~LsL-4 and a detection circuit in which LsR-1 to LsR-4 are inserted, respectively.

Also, a rotating air cylinder 24 for carrying in and discharging pallets 23L and 23H, and each pallet 23L.

Solenoid valves 5OLL-1 to 5OLL-3 and 5OLR- for switching the pneumatic circuit (not shown) that controls the air cylinder 41 that clamps and unclamps the 23R at the forward position.
1 to SOL R-3 are connected to the solenoid valve drive circuit 203, and the Rin signal and Lin
Relay circuits 204 each having signal-operated relays CRRin and CRL in inserted therein are connected.

There is a Li between the CPU 100 and the sequencer 200.
A signal circuit 205 is provided for exchanging an n signal, a Rin signal, a start signal, a stop signal, and various control signals. The CPU 100 has an input/output interface 100a, and its input/output terminals allow the CPU 100 to check the input/output status of each of the signals. Especially L
Input terminals t and n are set for the in signal and the Rin signal.

Input terminal 1. Regarding I[, a program number set for each Canadian program can be associated with the operation box 101, which is an external input means. In addition, since those programs and program numbers are stored in the RAM, input terminals! ,■ on state of CPU1
00 makes the decision, the program with the corresponding number can be called from the RAM. The above will be explained in detail later.

Next, the Lin signal and Rin signal will be explained.

The Lin signal and the Rin signal are applied to each processing area 22L.

Pallet 23L was carried into 22R and clamped.

This is output as a position signal of 23H, and is essentially used to determine the pallet to be processed. The loading and unloading of each pallet 23L, 23H is controlled independently. Therefore, even when a pallet that has been carried into one processing area and is clamped is being processed, a pallet may be carried into the other processing area and clamped, and the start button may be operated, but the position signal is The position signal of the pallet being processed, for example, if the pallet 23L is being processed, the Lin signal is prioritized, and when the processing of the pallet 23L is completed, the column 3 and spindle head 4 turn on the limit switches LsYK and LsZK, respectively. When moving to a position where inter-area movement is possible, software processing is performed to turn off the Lin signal and then turn on the position signal Rin of the pallet 23H. That is, the left and right pallets 23L,
The position signals Lin and Rin of 23H are never turned on and output at the same time. If they are output at the same time, the emergency stop signal circuit 112 is activated or error processing is performed.

The pallet loading/unloading process will be described below with reference to the flowchart shown in FIG.

The operations of the left and right pallets 23L and 23H are the same, so we will explain the left pallet 23L, and the right pallet 2.
Regarding 3゛R, only the different parts will be explained.

First, in step 5100 (hereinafter steps will be omitted), it is determined whether the left activation button 30L is on, and if it is on, YES, and in 5101 it is determined whether the Rin signal is off. If it is off, the answer is YES and the process advances to 8102, where it is determined whether the mode is automatic mode. If the Rin signal is on in 5101, NO and limit switches LsYK and LsZK are on in 8103, and the column 3 and spindle head 4
Determine whether or not it is located at a position where movement between processing areas is possible. If NO in 5103, the process advances to 5104, displays an alarm to the operator, and returns.

If YES, it is determined in 5105 whether the Lin signal is off, and if it is OFF, the process returns to 5102 if YES. Also, if the Lin signal is on, go to 8106 with No,
Since machining is possible in the machining area 22L, it is determined whether the automatic mode is selected. If it is automatic mode, YES is 81.
Proceed to step 23 and start the machine tool. If NO, 51 above
Return to 02.

If it is not the automatic mode in 5102, the subroutine for single action operation is called in 5107, and single action operation is performed for the left pallet 23L.In single action operation, a series of operations from loading to unloading of pallets is performed individually. So,
A detailed explanation thereof will be omitted.

If it is automatic mode in 5102, proceed to 8108 with YES and judge whether the pallet 23L is carried into the processing area 22L and clamped.If No, proceed to 5108.
At 109, the pallet 23L is moved to the ejection position (setup table 1
4 above), and if NO, there is no pallet to be processed, so the process returns to 8104 and an alarm is displayed for worker No. 1 and 2. Pallet 23L to be processed
If it is in the discharge position, YES, proceed to 5110 and carry in pallet 1-23 L, judge the completion of carrying in S↓11 to 5113 and clamp it, confirm the completion of clamping and proceed to 512
Go to 0.

If the pallet 23L has been carried in and clamped in step 5108, the process advances to YES''cS114 and it is determined whether the initial discharge memory is off.

The initial discharge memory is turned off when the power is turned on to the processing machine and the machine system is started up, while the pallet is being carried into the processing area. It is turned on if it is discharged. This is for the purpose of forcibly ejecting the pallet and inspecting the workpiece, rather than starting machining on the pallet that has been carried in when the machine system starts up when the power is turned on.

If the initial discharge memory is off in 5114,
If YES, the pallet 23L in the clamped state is unclamped in 3115-'S 118, and after unclamping is completed, it is ejected. After confirming the completion of ejection, the process proceeds to 5119, turns on the initial ejection memory, and returns.

In 5120, it is determined whether the Rin signal is on, and if it is on, the process proceeds to S'121 with YES, and it is determined whether the processing machine is in a temporary stop state. If No in 5121, priority is given to the Rin signal, and the process waits until the processing in the processing area 22R is completed and the Rin signal is turned off. 5121
If YES, the process returns, but if machining is temporarily stopped and then restarted while waiting for the Rin signal to turn off, the pallet 23L may be inadvertently activated when the Rin signal turns off. To prevent this, the device is configured to start after returning and operating the left start button 30L.

When it is confirmed in 5120 that the Rin signal is off, 5122
After turning on the Lin signal in 5123, the processing machine is started, and in 5124 it is determined whether the operation is complete. If it is not completed, determine whether it is in automatic mode at 5125, and
If o, it is single action mode, so return and wait for operation of the left start button 30L, and if YES, wait for operation completion, proceed to 5126, turn off the Lin signal, and turn off the Lin signal.
Proceeding to 115, the processed pallet 22L is discharged.

Regarding the loading/unloading process of the right pallet 22H, the left start button 30L of step number 5100 in the flowchart is changed to the right start button 30R, 5LOL, 5
120 Rin signal to Lin signal, 5105
, 5122 and 5126 as the Rin signal.

Barret) 23L in step of the above flowchart
, the discharge to the discharge position of 23H is completed, and the processing area 22L
, Completed transport to 22R, clamped.

Detection of unclamping is performed by limit switch LsL-1~
4 and Ls R-1 to 4 are turned on and off.

Next, regarding the operation execution process of this processing machine, Sections 8 to 1
This will be explained based on the flowchart shown in FIG.

FIG. 8 is a schematic flowchart of the main routine showing the overall flow of the driving execution process.

First, in step 5200, startup of the processing machine is confirmed, and the process proceeds to step 5201, where processing for switching the cannibal program is performed. followed by 5
202 reads one block of operation commands, and if 8203 is a coordinate system setting command, the process advances to 5204 to perform coordinate system shift processing, and if 5205 is an axis movement command, 8206 performs axis movement processing, followed by 5207 The operation is executed based on the cannibal program set in , various data, various control signals from the sequencer, etc., and if it is not the program end at 5208, the routine from 8202 onwards is executed, confirms the program end, and returns. .

The subroutines 5201, 5201, coordinate system shift processing, and 8206, axis movement processing will be described later.

FIG. 9 is a flowchart of the switching processing routine for the Canadian program.

At 5300, the CPU 100 determines whether the input terminal I of the input/output interface 100a to which the Lin signal output from the sequencer 200 is input is on. If it is on, it is 5301, and the operation box 10 is an external input means.
3, the Canadian program number associated with the input terminal Natsu is checked from the RAM 109. If NO in 5300, the process proceeds to 5302, where the CPU 100 determines whether the input terminal ■ to which the Rin signal is input is on, and if it is on, the process proceeds to 5302.
The program proceeds to step 03, and the program number associated with the input terminal (3) is checked from the RAM 109 in the same manner as described above. 53
If both 00 and 5302 are No, the process returns directly. Subsequently, in step 5304, the CPU 100 reads the Canadian program having the Canadian program number found from the RAM 109 and returns to the main routine.

As described above, L of the input/output interface 100a of the CPU 100 is input from the operation box 101 which is an external input means.
Input terminal for in signal and Rin signal ■.

By associating a predetermined Canadian program number with (2), the Canadian program can be easily specified and changed.

FIG. 10 is a flowchart of the coordinate system shift processing routine.

At 5400, the CPU 100 determines whether the input terminal I of the input/output interface 1°Oa to which the Lin signal output from the sequencer 200 is input is on. If it is on, the process proceeds to 5401, and it is determined whether the machining origin of the machining target pallet 23L based on the Lin signal is the machining reference point that became the reference for creating the specified cannibal program, and if YES, the main routine continues. If NO, the offset amount between the reference machining origin and the machining origin set in advance is read from the RAM 109 in 5402, and the process advances to 5403 to add or subtract it to the specified addition program. Then, the machining origin of the pallet to be machined is shifted to the reference machining origin so that the previous nib program can be machined, and the process returns to the main routine. If NO in 5400, it is determined in 5404 whether the input terminal ■ to which the Rin signal is input is on, and if it is on, the pallet to be processed 23R is processed based on the Rin signal.
54, perform the same processing as 5401 to 5403 above.
This is done in steps 05 to 5407, and if it is determined No in both steps 5400 and 5404, an alarm is displayed or the like in step 8408 to notify the operator.

The coordinate system shift processing described above is performed on the left and right processing areas 22L,
Pallets 23L and 23 are carried into 22R and clamped.
Machining of the same shape is performed on the workpiece placed on R using one machine program. Usually, the coordinates of each machining origin in the Y-axis direction are the same, and the offset amount in the X-axis direction is added or subtracted. to shift the machining origin,
When an offset amount exists in the Y rotation direction, it is sufficient to calculate the offset amount for each axis and perform addition/subtraction.

FIG. 11 is a flowchart of the axis movement processing routine.

When a movement command for the column 3 on which the spindle head 4 is mounted is input in 5500, the end point position of the movement command is calculated in 5501. Next, at 5502, the input terminal of the input/output interface 100a is inputted with the Lin signal output from the sequencer 200! The CPU 100 determines whether or not is on, and if it is on, the process proceeds to 8503 with YES, and the processing target pallet 23L based on the Lin signal is moved within the permissible movement range of the column 3 set in advance in the clamped processing area 22L. It is determined whether the end point position of the movement command is included, and if it is included, the stroke over flag is turned off (5504); if it is not included, it is determined that the stroke is over, and the stroke over flag is turned on (5505). If NO in step 5502, it is determined in step 5506 whether the input terminal ■ to which the Rin signal is input is on, and if it is on, the processing area 22R to which the pallet to be processed 23R is clamped based on the Rin signal is determined in step 5503.
- Perform the same processing as in 5505 in 5507 to 5509,
Furthermore, when both the Lin signal and the Rin signal are not on, it means that there is no pallet in either the left or right machining areas 22L, 22R, so in 5510 whether the end point of the movement command is included in the entire machining area? If it is included, turn off the stroke over flag 5511),
If the flag is not included, the flag is turned on (S512). After the processing of each stroke over flag is completed, 5
The process advances to step 513, and if the stroke over flag is on, an alarm is displayed and execution of the movement command is blocked in step 5514, and if it is off, execution of the movement command is permitted in step 5515, and the process returns to the main routine.

In the case where both the Lin signal and the Rin signal are turned on, the emergency stop signal circuit 111 described above operates to perform an emergency stop.

As mentioned above, the embodiment of the present invention has been described as having two machining areas, left and right, and a pallet is provided for each machining area, but it can also be applied to a processing machine having three or more machining areas. It is possible.

Furthermore, it is also possible to apply the present invention to an industrial sewing machine or the like that uses a sewing machine needle as a processing tool and has a plurality of work areas.

"Effects of the Invention J As clarified in the description of the above-mentioned specific means and effects, in the present invention, the permissible movement range of the column is set for each of a plurality of machining areas, and when there is a command to move the column, The pallet to be machined is identified, and a stroke over is determined based on whether or not the end point of the movement command is included within the movement tolerance set in the machining area of the identified pallet to be processed. In the case of a stroke over, the movement command is Since the execution is blocked, it is possible to easily and accurately prevent stroke overs caused by moving from one machining area to another in a processing machine that has multiple machining areas and has a pallet for each machining area. effective.

[Brief explanation of the drawing]

The accompanying drawings illustrate embodiments of the present invention; FIG. 1 is a front view of the processing machine with the pallet loading/unloading mechanism 21 omitted, FIG. 2 is a side view of the same, and FIG. 3 is a view of the pallet loading/unloading mechanism 21. A plan view, FIG. 4 is a partially cutaway enlarged front view taken along line A in FIG. 3, FIG. FIG. 7 is a flowchart showing the pallet loading/unloading process; FIG. 8 is a schematic flowchart of the main routine showing the overall flow of the operation execution process; FIG. 9 is a block diagram showing the outline of the circuit;
10 is a flowchart showing a coordinate system shift processing routine, and FIG. 11 is a flowchart showing an axis movement processing routine. 311. Column, 490. Spindle head, 21,
,. Pallet loading/unloading mechanism, 22, 22L, 22R01
, Processing area, 23L, 23R, , Pallet, 100
, ,CPU, 100a, ,input/output interface, 101, ,operation box, 109°. , RAM, 110. ,,ROM, 111,,
, emergency stop signal circuit, 200 , , sequencer,
■. ■09. Input terminal. Diagram

Claims (1)

[Claims] A column having a processing tool and movable within a plurality of set processing areas and between the processing areas, and moving between a forward position within the processing area and a retreat position outside the processing area. A processing machine in which a possible pallet is provided for each of the machining areas, an input means for inputting various commands, an arithmetic unit for analyzing the input commands, a storage means for storing necessary information, and a processing machine for storing the above-mentioned information in the storage means. a setting means for setting the permissible movement range of the column for each of the plurality of machining areas; a determining means for determining the pallet to be machined clamped at the forward position of the machining area; and a tolerance set in the machining area of the determined pallet to be machined. Stroke over determination means for determining whether the end point of the movement command for the column is included within the movement range; and prevention means for preventing execution of the movement command when the determination means determines that the movement command is over stroke. A processing machine characterized by being equipped with.