JP2508198B2 - Processing machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a processing machine having a plurality of processing areas and a pallet provided for each processing area, and particularly, the processing origin of each pallet is used as a reference processing origin. The machining origin is shifted so that the machining program created based on the standard machining origin can be executed on each pallet.

“Prior Art” Conventionally, in a processing machine or machine tool having a plurality of processing areas and provided with a pallet for each processing area, when a workpiece of the same shape is processed by a pallet clamped in each processing area, A machining program was created for each pallet for machining.

[Problems to be Solved by the Invention] However, creating a machining program for each pallet is not only a very labor-intensive task, but also increases the chance of making a mistake in creating the program.
Further, it is necessary to increase the storage capacity of the memory for storing the machining program, which causes problems such as being uneconomical, which has been a problem to be solved.

The present invention has been made in order to solve the above-mentioned problems, and performs a machining origin shift using the machining origin of each pallet as a reference machining origin, and executes a machining program created with the reference machining origin as a reference on each pallet. It is an object of the present invention to provide a processing machine that can be used.

"Means for Solving the Problem" Specific means for achieving the above-mentioned object is a column that has a processing tool and is movable in a plurality of set processing areas and between the processing areas, and in the processing area. In a processing machine that has pallets movable between the forward position and the retracted position outside the processing area for each processing area, set the processing origin for each pallet, and set one of them as the reference processing origin. The machining program created based on the reference machining origin, the storage means for storing the offset amount between the reference machining origin and each machining origin, and the discrimination for discriminating the machining target pallet clamped at the forward position of the machining area Means and the offset amount between the determined machining origin of the pallet to be machined and the reference machining origin are uniformly added to or subtracted from the machining program to become the basis of the machining program. It is characterized in that a machining origin shift means for shifting the reference machining origin to the machining origin of the pallet to be machined is provided.

[Operation] According to the specific means, one of the machining origins set for each pallet is used as the reference machining origin, and the machining origin of each pallet is used as the reference machining origin based on the offset amount between the machining origin and the reference machining origin. It is possible to machine workpieces of the same shape by shifting the machining origin, and executing the machining program created on the basis of the standard machining origin on each pallet.

[Embodiment] An embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a front view of the processing machine of the present invention, FIG. 2 is a side view of the same, and a pallet loading / unloading mechanism 21 is indicated by a chain double-dashed line in order to explain it in detail with reference to FIGS. It is shown.

A column base 2 is provided on the base 1 so as to be slidable in the horizontal direction (X-axis direction). A column 3 is slidable on the column base 2 in the front-rear direction (Y-axis direction). Spindle heads 4 are mounted slidably in the vertical direction (Z-axis direction). Column base 2 is X-axis motor 5,
The column 3 is a Y-axis motor 6 and the spindle head 4 is a Z-axis motor 7.
Are respectively driven by. The spindle head 4 is provided with a spindle 9 which is driven to rotate by a spindle motor 8, and a rotary magazine type automatic tool changer 10 is mounted. A fixed table 13 and a setup table 14 are fixed to the table portion 12 on the front side of the base 1. Overrun limit switches Ls-X and Ls + X for restricting the overrun of the column base 2 in the X-axis direction are arranged on the left and right of the mounting plate 15 on the back surface of the fixed table 13, and if the arrangement positions are different in the Z direction. Fix the two dogs 16 and 17 that have been set. In the center of the front surface of the column base 2, the overrun limit switch Ls-X is arranged in order from the top.
And a dog 18 corresponding to Ls + X and limit switches LsR and LsL corresponding to the dogs 16 and 17, respectively. The limit switches LsR and LsL detect movements in two left and right machining areas, which will be described later, of the column base 2.

On the upper surface of the right end of the column base 2, the Y of the column 3 is
Overrun limit switches Ls-Y and Ls + Y for regulating overrun in the axial direction are provided, and a limit switch LsYK is arranged inside the limit switch Ls + Y, and these limit switches Ls-Y, Ls + Y and LsYK correspond to these limit switches. Fix dog 19 to the right side of column 3. In the limit switch LsYK, the main shaft 9 is + from the upper surface of the fixed table 13.
Turns on at a position deviating in the Y-axis direction.

Further, overrun limit switches Ls-Z and Ls-Z for restricting the overrun of the spindle head 4 in the Z-axis direction are arranged on the right side surface of the column 3, and the limit switch Ls + Z is provided.
A limit switch LsZK is arranged on the lower side of the dog, and dogs 20 corresponding to these limit switches Ls-Z, Ls + Z and LsZK are provided.
Is fixed to the spindle head 4. This limit switch LsZK
Turns on at the upper retracted position of the spindle head 4 in the + Z-axis direction.

FIG. 3 is a plan view of the pallet loading / unloading mechanism 21.

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.

Two pallets 23L, 23R are provided for the two left and right processing areas 22L, 22R so as to be movable between an advance position within the processing area and a setup table 14 which is a retracted position outside the processing area. This movement is performed by the pallet loading / unloading mechanism 21, and the rotary air cylinder 24 of the mechanism 21 reciprocates within a predetermined angle, thereby fixing one end to the rotary air cylinder 24 and attaching the roller 25 attached to the other end to the pallet 23L. L-shaped arms 27L and 27R fitted in guide members 26 fixed to the front side of
Is carried out and indexed. Pallets 23L, 23R
Is a roller guide installed between the forward and backward positions.
While being guided by 28, its upper surface is pallet 23L,
The roller 29 provided on the lower surface of 23R rolls. Pallets 23L, 23R
Arrives at the forward position and the backward position, respectively, by LsL−1, L
It is detected by sL-2, LsR-1, and LsR-2.

On the other side of the setup table 14, start buttons 30L, 30R and emergency stop buttons for the left and right pallets 23L, 23R
31L, 31R and automatic / single-action mode selector switch 32 are arranged.

For the pallets 23L and 23R, setup is performed in which the unprocessed work is placed and the processed work is removed at the setup table 14, which is a retracted position. Alternatively, unclamping is performed.

FIG. 4 is an enlarged front view showing the clamped and unclamped states of the pallet with different cutting positions.

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

Clamping air cylinders 41 are fixed to the fixed tables 13 corresponding to the center positions of the left and right processing regions 22L and 22R, respectively. A clamper 43 is fixed to the upper end of the piston 42 of the air cylinder 41. The upper surface position of the clamper 43 in the unclamped state matches the upper surface position of the roller guide 28, and the rollers 2 of the pallets 23L and 23R that roll on the guide 28.
9 rolls on clamper 43 as it is, and pallet 2
3L and 23R are stopped at the forward position.

Clamp plates 44 facing the lower surface of the clamper 43 with a space 1 are fixed to the lower surfaces of both sides of the pallets 23L, 23R, and correspond to the clamp bases 45 arranged 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 to the lower end, and a limit switch LsR- that detects the unclamped state of the pallet corresponding to the dog 47 3 is provided with limit switches LsR-4 corresponding to the dogs 48 for detecting the clamped state of the pallet. Although not shown in the drawings, the dog pin 46, the dogs 47, 48 and the limit switches LsL-3, LsL-4 on the left side are provided with the same mechanism on the left and right.

In addition, positioning pins 49 are provided upright on the fixed table 13 and positioning holes 50 are formed on the lower surfaces of the pallets 23L and 23R.
Correspond to. Air is blown to the clamp base 45 by an air blower (not shown),
Prevents chips and cutting fluid from adhering.

The clamp operation at the forward position of the pallets 23L, 23R is performed as follows.

First, when the piston 42 of the air cylinder 41 descends, the pallet 23L (23R) placed on the upper surface of the clamper 43 moves downward together with the clamper 43, and the positioning pin 49 and the positioning hole.
When the clamp plate 44 is placed on the clamp base 45, the downward movement is stopped, and the clamper 43 further moves downward by an interval l to apply a clamp pressure to the upper surface of the clamp plate 44. And clamp firmly, and at the same time, the limit switch LsL-4 (LsR
-4) is operated to stop the lowering of the piston 42, and the clamped state is detected. Pallet 23L (23R)
The unclamping of the
To operate the limit switch LsL-3 (LsR-3) to stop the rise of the piston 42 and detect the unclamped state.

Each control such as clamping, unclamping, carrying in to the forward position, discharging to the backward position, etc. of the pallets 23L, 23R at the forward position is based on the detection signal of each limit switch or the like, which constitutes a pneumatic circuit (not shown). Solenoid valves SOLL-1 to SOLL-3 for switching the pneumatic circuits to the rotating air cylinders 24, 24, the clamping air cylinders 41, 41, and the solenoid valves
SOLR-1 to SOLR-3 etc. (the above is shown in the block diagram of FIG. 6).

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

Left and right processing areas 22L and 22R are set in the processing area 22, and the allowable movement range of the column 3 is set for each processing area 22L, 22R by XY plane coordinates as shown in the figure. It The coordinate values X _{L− to} X _{R +} and Y _{L− to} Y _{R +} are stored in a storage device or the like as control parameters of the processing machine.

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

The machining pallets 23L and 23R carried into the set machining areas 22L and 22R have their respective machining origins defined, and a machining program is created based on these machining origins.

Using one of the machining origins as the reference machining origin, based on the offset amount with other machining origins, and adding or subtracting that offset amount uniformly in the machining program, the machining origin is shifted to the reference machining origin and becomes the same. It is also possible to execute the machining program in 22L and 22R in each machining area.

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

The control circuit mainly controls the processing operation of the processing machine.
00 and a sequencer 200 for controlling loading / unloading of pallets and starting / stopping of a processing machine.

The operation box 101 is connected to the CPU 100. The operation box 101 includes a CRT display 102 and an operation switch 103 for inputting various data. Further, the relay control circuit 104 is connected, the relay signals from the CPU 100 are received, the magnet relays MCX, MCY, MCZ and MCS are activated, and the power supplies of the drivers 105 to 108 for the X, Y, Z and spindle motors are turned on. Driver 105
The CPU 100 outputs an instruction command signal to the CPUs 108 to 108 according to the machining program, and the X-axis motor 5, the Y-axis motor 6, the Z-axis motor 7, and the main shaft motor 8 are rotationally controlled. Further CP
A RAM 109 in which various processing programs and various processing data are stored, and a ROM 110 in which a control program for the CPU 100 is stored are connected to the U100.

Overrun limit switches Ls-X, Ls + X, Ls-Y, which regulate overruns in the X-axis direction of the column base 2, the Y-axis direction of the column 3, and the Z-axis direction of the spindle head 4, respectively.
Overrun control signal circuit with Ls + Y, Ls−Z and Ls + Z inserted
111 and the emergency stop signal circuit 112 connected to the circuit 111 are C
Connected to PU100.

The emergency stop signal circuit 112 is provided with a limit switch LsL for detecting the movement of the processing areas 22L and 22R of the column base 2.
Between the limit switch circuit 113 in which LsR is inserted in series, two relay contact circuits 114 and 115 are provided, crossed at the center in a cross-like manner, and both ends thereof are used as switching contacts of limit switches LsL and LsR, and the limit switch Switch circuit 11
Manual stop button 31L for the left and right machining areas 22L, 22R
31R is inserted in series. Relay contact circuit 114
Is a relay CRLin operated by the left pallet signal (hereinafter referred to as the Lin signal) output from the sequencer 200 to the CPU 100.
A relay contact that closes the contact with and a relay contact that opens the contact with a relay CRRin that operates with the right pallet signal (hereinafter referred to as the Rin signal) are inserted in series. Similarly, the relay contact circuit 115 includes a relay contact that is closed by a relay CRRin that is similarly operated by a Rin signal and a relay contact that is opened by a relay CRIin that is operated by a Lin signal. The Rin signal and Lin signal will be described later.

The limit switch LsY is included in the emergency stop signal circuit 112.
The inter-working area movable signal circuit 116 in which K and LsZK are inserted in series is 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 + Y-axis direction from the front side to the back side, the spindle 9 is disengaged from the upper surface of the fixed table 13, and the spindle head 4 is moved to + Z. In the upper retracted position in the axial direction and in the movable position between machining areas, even if the emergency stop signal circuit 112 operates, the column base 2 is at the central position where the limit switches LsL and LsR are not turned on at the same time. Machining area 22L, 22R even when
It is one that can be moved between.

Since the emergency stop signal circuit 112 switches the contact by turning on one of the limit switches LsL and LsR by moving the column base 2 into the left or right machining area, one of the relay contact circuits 114 and 115 is always present. Wired and interlocked.

The emergency stop signal circuit 112: (1) When the limit switch LsL or LsR is turned off and the movement detection signal in the machining area of the column base 2 is not detected while trying to move from the machining area being machined to another machining area. , (2) Sequencer 20
When 0 is malfunctioning and Rin signal and Lin signal are output at the same time, (3) When limit switch LsL or LsR is turned off due to disconnection, displacement or failure, or manual stop button 31L,
It operates when 31R is pressed, outputs an emergency stop signal to CPU100, CPU100 turns off the relay signal to relay control circuit 104, deactivates magnet relays MCX, MCY, MCZ and MCS, and X, Y , Z and the spindle motor drivers 105 to 108 are turned off, and the dynamic brake is actuated to stop the motors of the respective axes.

Carrying in pallets 23L, 23R to each processing area 22L, 22R,
The sequencer 200 that controls the discharge has a manual button circuit 201
And the limit switch circuit 202 is connected.

The manual button circuit 201 includes a mode switching circuit having an automatic / single-acting mode switching switch 32 for the left and right pallets 23L and 23R, a left start button 30L and a right start button 30R, respectively.
And a start circuit interposed.

Limit switch circuit 202 consists of left and right pallets 23L, 23R
Limit switches LsL-1 to LsL-4 and LsR- that detect loading of each processing area 22L, 22R to the forward position, clamping, unclamping at the forward position, and discharge from the forward position.
1 to LsR-4, respectively, and a detection circuit.

In addition, an electromagnetic circuit for switching the pneumatic circuit (not shown) that controls the rotary air cylinder 24 for loading / unloading the pallets 23L, 23R and the air cylinder 41 for clamping / unclamping the pallets 23L, 23R at the forward position. Valve SOLL-1 to SOLL
-3 and SOLR-1 to SOLR-3 are connected respectively, and a solenoid valve drive circuit 203 is connected, and a relay circuit 204 in which relays CRRin and CRLin operated by Rin signal and Lin signal are respectively connected is connected. .

Between the CPU 100 and the sequencer 200, a Lin signal, a Rin signal
A signal circuit 205 for exchanging signals, start signals, stop signals, and various control signals is provided. The CPU 100 has an input / output interface 100a, and its input / output terminal allows the CPU 100 to check the input / output state of each signal. Especially for the Lin signal and the Rin signal, the input terminals I and II are set.

With respect to the input terminals I and II, a program number set for each machining program can be associated with the operation box 101 which is an external input means. Further, since the machining program and the program number are stored in the RAM, the CPU 100 can call the machining program of the corresponding number from the RAM by determining the ON state of the input terminals I and II. The above will be described later in detail.

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

The Lin signal and the Rin signal are output as position signals of the pallets 23L and 23R carried into and clamped in the respective processing areas 22L and 22R, and substantially determine the pallet to be processed. Loading / unloading of each pallet 23L, 23R is controlled independently. Therefore, even while the pallet loaded and clamped in one processing area is being processed, the pallet may be loaded and clamped in the other processing area, and the start button may be operated. Position signal of the pallet being processed, for example pallet 23
If L is being machined, the Lin signal is prioritized, the machining of the pallet 23L is completed, and when the column 3 and the spindle head 4 are moved to the movable positions between the machining areas where the limit switches LsYK and LsZK are turned on, respectively, It is processed by software so as to turn off the Lin signal and subsequently turn on the position signal Rin signal of the palette 23R. That is, the position signals Lin and Rin of the left and right pallets 23L and 23R are not turned on and output at the same time. When the signals are output at the same time, the emergency stop signal circuit 112 operates and error processing is performed.

The loading / non-processing of pallets will be described below with reference to the flowchart of FIG.

Since the operations of the left and right pallets 23L and 23R are the same, only the left pallet 23L will be described, and only the different parts of the right pallet 23R will be described.

First, in step S100 (the following steps will be omitted), it is determined whether or not the left drive button 30L is on. If it is on, YES
At S101, it is determined whether the Rin signal is off. If it is off, the process advances to S102 with YES to determine whether or not the mode is the automatic mode. If the Rin signal is ON in S101, it is NO, and in S103, it is determined whether the limit switches LsYK and LsZK are ON, and whether the column 3 and the spindle head 4 are located at the movable positions between the processing areas. If NO in S103, the process proceeds to S104, an alarm is displayed to the worker, and the process returns. S if YES
In 105, it is determined whether the Lin signal is off, and if it is off, YE
Return to S102 at S. NO if the Lin signal is ON
The process proceeds to S106, and it is determined whether or not the automatic mode is set because the processing area 22L can be processed. YE for automatic mode
In S, proceed to S123 to start the machine tool. If NO, then S10
Return to 2. If the automatic mode is not set in S102, the single-action operation subroutine is called in S107 to perform the single-action operation for the left pallet 23L. Since the single-action operation is to perform a series of operations from loading the pallet to discharging it to each individual,
Detailed description thereof will be omitted.

If the automatic mode is selected in S102, the process proceeds to S108 with YES to determine whether or not the pallet 23L is carried into the processing area 22L and clamped, and if NO, the pallet 23L is subsequently processed in S109.
Is in the discharge position (on the setup table 14). If NO, there is no pallet to process, so S1
Return to 04 and display an alarm to the operator. If the pallet 23L to be processed is at the discharge position, the determination is YES, the process proceeds to S110, the pallet 23L is loaded, the loading completion is determined and clamped in S111 to S113, the clamping completion is confirmed, and the process proceeds to S120.

If the pallet 23L is loaded and clamped in S108, the process proceeds to S114 in YES, and it is determined whether or not the initial discharge memory is off.

The initial discharge memory turns off when the machine system is powered on and the machine system is started up, and the pallet is loaded into the processing area, and it is temporarily discharged onto the setup table 14 regardless of whether it is automatic or manual. When it is done, it turns on. This is not to start machining the pallet loaded at the start of the machine system when the power is turned on, but to forcibly discharge the pallet and inspect the work.

If the initial ejection memory is turned off in S114 above, YE
In S, the pallet 23L clamped in S115 to S118 is unclamped, discharged after unclamping is completed, the discharge completion is confirmed, the process proceeds to S119, and the initial discharge memory is turned on to return.

In S120, it is determined whether the Rin signal is on. If it is on, YES is selected and the process proceeds to S121 to determine whether the processing machine is temporarily stopped. If NO in S121, the Rin signal is given priority, and the process waits until the machining in the machining region 22R ends and the Rin signal turns off. If YES in S121, the process returns, but if the machining is paused and restarted while waiting for the Rin signal to turn off, the pallet 23L will be inadvertently started when the Rin signal turns off. In order to prevent it from entering, it is arranged to move after the return start button 30L is operated.

When the Rin signal is turned off in S120, the Lin signal is turned on in S122, the processing machine is started in S123, and it is determined in S124 whether the operation is completed. If not completed, it is determined in S125 whether or not the automatic mode is set, and if NO is determined because the single-action mode is set, the process returns to wait for the operation of the left start button 30L. If YES, the operation waits for completion of operation, the Lin signal is turned off in S126, and the discharge processing of the processed pallet 22L is executed in S115.

For the loading / unloading process of the right pallet 22R, the left start button 30L of step S100 in the above flowchart
To the right start button 30R, and set the Rin signal of S101 and S120 to L
In signal, and the Lin signal of S105, S122 and S126 is Rin
The loading / unloading process is performed according to the flow chart using signals.

Pallet 23L in the steps of the flowchart described above,
The completion of the discharge of the 23R to the discharge position, the completion of the transfer to the processing areas 22L and 22R, and the detection of the clamp and the unclamping are performed by turning on and off the limit switches LsL-1 to 4 and LsR-1 to 4.

Next, the operation processing of the present processing machine will be described based on the flowcharts of FIGS.

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

First, in S200, the start of the processing machine is confirmed, and the process proceeds to S201, in which the processing program switching processing is performed. Subsequently, one block of the operation command is read in S202, and if it is a coordinate system setting command in S203, proceed to S204 to perform coordinate system shift processing, and if it is an axis movement command in S205, perform axis movement processing in S206. Then S2
The operation is executed based on the machining program set in 07, various data and various control signals from the sequencer, and S2
If it is not the program end in 08, the routine from S202 is executed, the program end is confirmed, and the process returns.

Subroutines of the processing program switching process of S201, the coordinate system shift process of S204, and the axis movement process of S206 will be described later.

FIG. 9 is a flow chart of a processing program switching processing routine.

In S300, 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, in S301, the machining program number associated with the input terminal I is checked from the RAM 109 by the operation box 103 which is an external input means. S3
If NO in 00, the process proceeds to S302, and the CPU 100 determines whether or not the input terminal II to which the Rin signal is input is ON. If ON, S303
Then, the process goes to step 109 and the machining program number associated with the input terminal II is checked from the RAM 109 as described above. If both S300 and S302 are NO, the process directly returns. Subsequently, in S304, the machining program having the machining program number checked by the CPU 100 is called from the RAM 109, and the process returns to the main routine.

From the above, the Lin signal and R of the input / output interface 100a of the CPU 100 from the operation box 101 which is the external input means
Designate a machining program by associating a predetermined machining program number with the input terminals I and II of the in signal.
Changes can be made easily.

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

In S400, 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, proceed to S401,
Judging whether the machining origin of the pallet 23L to be machined based on the Lin signal is the machining reference point that has become the reference for the specified machining program creation. If YES, return to the main routine as it is, if NO The offset amount between the standard machining origin and the machining origin preset in S402 is called from RAM109, and the process proceeds to S403 where it is uniformly added or subtracted to the designated machining program to make the machining origin of the pallet to be machined the standard. It shifts to the machining origin so that machining can be performed with the machining program, and the process returns to the main routine. In the case of NO in S400, it is determined whether or not the input terminal II to which the Rin signal is input is ON in S404.
For the processing target pallet 23R based on the Rin signal, the S4
The same processing as 01 to S403 is performed in S405 to S407. If NO is determined in both S400 and S404, an alarm is displayed in S408 to notify the operator.

The coordinate system shift processing described above is performed on the left and right processing areas 22L, 22
The workpieces placed on the pallets 23L and 23R that are loaded into the R and clamped are machined in the same shape using a single machining program. Normally, the Y-axis direction coordinates of the respective machining origins are matched and X The processing origin shift is performed by adding or subtracting the offset amount only in the axial direction. When there is an offset amount in both the X and Y axes, the offset amount may be calculated for each axis and addition / subtraction may be performed.

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

When a movement command for the column 3 equipped with the spindle head 4 is input in S500, the end point position of the movement command is calculated in S501. Subsequently, in S502, the CPU 100 determines whether or not the input terminal I of the input / output interface 100a to which the Lin signal output from the sequencer 200 is input is ON.
Then, it is determined whether or not the calculated end point position of the movement command is included in the allowable movement range of the column 3 preset in the processing area 22L where the processing target pallet 23L is clamped based on the Lin signal. If so, the stroke over flag is turned off (S504), and if not included, it is determined that the stroke is over, and the stroke over flag is turned on at S505. If NO in S502, it is determined in S506 whether or not the input terminal II to which the Rin signal is input is ON.
For the processing area 22R in which the processing target pallet 23R based on the n signal is clamped, the same processing as S503 to S505 is performed in S50.
Perform with 7 to S509. If neither the Lin signal nor the Rin signal is on, it means that the pallet does not exist in either of the left and right machining areas 22L and 22R. Whether or not it is judged, the stroke over flag is turned off if included (S511), and if not included, the flag is turned on (, S512). After the above stroke over flag processing is completed, the process proceeds to S513. If the stroke over flag is on, the execution of the move command is blocked in S514 with the alarm display, and if it is off, the execution of the move command is permitted in S515. And then returns to the main routine. In the case where both the Lin signal and the Rin signal are turned on in the above, the emergency stop signal circuit described above
111 is activated and it makes an emergency stop.

As described above, the embodiment of the present invention has been described in a mode in which the left and right processing areas are provided and the pallets are provided for the respective processing areas, but it is also applicable to a processing machine having three or more processing areas. It is possible.

Further, it is possible to apply a sewing machine needle as a processing tool to an industrial sewing machine having a plurality of work areas.

[Effect of the Invention] As has been clarified in the description of the concrete means and operation, the present invention uses one of the machining origins set for each pallet as the reference machining origin, and offsets the machining origin from the reference machining origin. It is possible to machine workpieces of the same shape by shifting the machining origin with the machining origin of each pallet as the reference machining origin based on the amount, and executing the machining program created with the reference machining origin as the reference on each pallet. Therefore, when a workpiece having the same shape is machined in each pallet, it is not necessary to create a machining program for each pallet, and there is an excellent effect that the capacity of the memory for storing the machining program can be saved.

[Brief description of drawings]

1 is a front view of a processing machine in which the pallet loading / unloading mechanism 21 is omitted, FIG. 2 is a side view of the same, and FIG. 3 is a pallet loading / unloading mechanism 21. A plan view, FIG. 4 is a partially cutaway enlarged front view taken along the line AA in FIG. 3, and FIG. 5 is a processing area set on the fixed table 13.
22 is an explanatory diagram for explaining 22. FIG. 6 is a block diagram showing an outline of a control circuit. FIG. 7 is a flowchart showing a pallet loading / unloading process. FIG. 8 is a main routine showing an overall flow of an operation executing process. FIG. 9 is a schematic flowchart, FIG. 9 is a flowchart showing a machining program switching processing routine, FIG. 10 is a flowchart showing a coordinate system shift processing routine, and FIG. 11 is a flowchart showing an axis movement processing routine. 3 ... column, 4 ... spindle head, 21 ... pallet loading / unloading mechanism, 22,22L, 22R ... processing area, 23L, 23R ... pallet, 100 ... CPU, 100a ... input / output interface, 101 …… Operation box, 109 …… RAM, 110 …… ROM, 1
11 …… Emergency stop signal circuit, 200 …… Sequencer, I, II…
… Input terminal.

Claims (1)

(57) [Claims] 1. A column having a processing tool, which is movable within a plurality of set processing areas and between the processing areas, and movable between an advanced position within the processing area and a retracted position outside the processing area. In a processing machine in which each pallet is provided for each processing area, a processing origin is set for each pallet, one of them is set as a reference processing origin, and a processing program created based on the reference processing origin, Storage means for storing the offset amount between the reference machining origin and each machining origin, a discrimination means for discriminating the machining target pallet clamped at the forward position of the machining area, a machining origin for the determined machining target pallet, and a standard machining origin The offset amount of and is uniformly added to or subtracted from the machining program to shift the reference machining origin, which is the reference amount of the machining program, to the machining origin of the pallet to be machined. A processing machine provided with a processing origin shifting means.