JPH05313726A - Numerical controller - Google Patents

Abstract

PURPOSE:To prevent the occurrence of a cutter mark by providing the NC-side processing with a digestion buffer-final discriminating means, an intermediate buffer emptiness-discriminating means, a fast-forwarding discriminating means, and an interlock means to prevent a break of command for cutting feed. CONSTITUTION:An intermediate buffer 18 is provided between a supply buffer 16 and a digesting buffer 20. The empty state the intermediate buffer 18 is always discriminated on an NC side 22 at the time of NC operation; and if it is empty and the block to be next executed is fast-forwarded, the start of block execution is interlocked, and it is held till the intermediate buffer 17 is filled up through the supply buffer 16. The timing is so adjusted that block execution is started after it is filled. That is, a block execution start inter- locking means for fast-forwarding is held till the intermediate buffer 18 is filled, and the processing is returned to the normal processing after it is filled, thereby preventing the cutter mark from being made on following cutting feed blocks. The cutter mark is not made though the start is held till the intermediate buffer 16 is filled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a numerical control device capable of preventing a cutter mark generated on a cutting surface due to a break of a command at the time of cutting feed of a numerical control device and capable of BTR (Behind Tape Reader). Is.

[0002]

2. Description of the Related Art FIG. 15 shows an automatic program (hereinafter referred to as AP
It is a block diagram showing a hardware configuration of a built-in numerical control device (hereinafter referred to as an NC device). In the figure, 30 is a CP for executing control and calculation of the entire apparatus
U and 32 are NC-side ROMs that store software for executing NC processing, 34 is NC-side RAM that is a work area during NC processing, and 36 is an AP-side ROM that stores software for executing AP processings. Reference numeral 38 denotes an AP side RAM which is a work area during AP processing (hereinafter, the NC side ROM 32 and the NC side RAM 34 are abbreviated to the NC side, and the AP side ROM 36 and the AP side RAM 38 are abbreviated to the AP side).

Reference numeral 40 denotes a machining program storage RAM, which functions as various storage buffers for the NC machining program generated on the AP side and the NC machining program input from the input / output unit 42, which will be described later. Time,
The NC side fetches the program, analyzes it, and executes numerical control.

Reference numeral 42 is an input / output unit for starting NC operation, N
Input from the switch 42a from the outside, such as C operation suspension,
Input from the key data input unit 42b, auxiliary function output, spindle function output, NC machining program input / output with the outside, and the like are performed. 44 is an external NC machining program creation device,
It is generally called a host computer, which creates an NC machining program externally and applies it to the input / output unit 42. This is an external input / output device unlike the built-in AP side ROM 36 and RAM 38. .. Reference numeral 46 denotes a display unit, which displays the operating state on the NC side, the automatic determination data on the AP side, and the like on the display 46a. Reference numeral 48 denotes a drive unit that performs amplification processing or the like on the data numerically controlled on the NC side to drive the servo motor 48a.

FIG. 16 is a block diagram showing the flow of signals in the conventional NC operation. In the figure, 10 is the AP side, which generates and supplies a machining program for NC in the AP input mode when starting NC operation,
It is set in the supply buffer 16 described later. 12 is an external N
This is a C machining program creation device, generally called an external input / output device, which generates and supplies a machining program for NC when starting NC operation and applies it to an input / output unit 14 described later. 1
Reference numeral 4 denotes an input / output unit, which activates the external NC machining program creating device 12 in the external device input mode when the NC operation is activated, inputs the NC machining program which is the output data thereof, and executes a parity check or the like. Then, it is set in the supply buffer 16 described later.

Reference numeral 16 is a supply buffer, which is an NC machining program storage area of a plurality of blocks and is generated by the AP side 10 or the external NC machining program creating device 12.
The machining program for C is stored block by block, and when it is full, it is transferred to the digestion buffer 20 described later. Generally, after the transfer, it becomes empty and requests data from the AP side 10 or the external NC machining program creating device 12, and stores again one block at a time. Reference numeral 20 is a digestion buffer, which transfers the NC machining program from the supply buffer 16 in the NC machining program storage area of a plurality of blocks, and the NC side 22 to be described later.
The data is sent block by block, and when it is exhausted, it becomes empty, and the data is requested to the supply buffer 16 again.

Reference numeral 22 denotes the NC side, which takes out the data of the NC machining program block by block from the digestion buffer 20, analyzes it, and performs interpolation calculation and the like corresponding to the tool feed speed. Further, it also notifies the AP side 10 or the external NC machining program creation device 12 of a control signal such as NC operation start. A driving unit 24 drives the servo motor 24a by amplifying the numerical control data interpolated on the NC side 22 and the like.

Next, the extinguishing operation of the NC side 22 during the NC operation will be described with reference to the flow chart shown in FIG. First, NC operation is started from the NC side 22 to the AP side 10 or the external NC machining program creation device 12, and the NC
The processing program for use is generated and the supply buffer 16 is generated. Next, it is judged whether or not the digestion buffer 20 is empty (S40), and if it is not empty, the route of A is passed and the process jumps to step 50. On the contrary, if it is empty, the process proceeds to step 42. Next, it is determined whether or not the supply buffer 16 is empty (S42). If the supply buffer 16 is empty, the route B is taken and a series of processing is terminated. On the contrary, if it is not empty, the contents of the supply buffer 16 are transferred to the digestion buffer 20 (S44).

Next, one block (for example, G01X-100.Y-) of the NC machining program from the digestion buffer 20 is used.
100. ;) Is taken out (S50). Next, the amount of movement (X-10) corresponds to the commanded tool feed speed (F100).
0. Y-100. ) Is performed (S52).
Then, the interpolated data is output to the drive unit 24 (S54), and a series of processing is ended. After that, the drive unit 24
Operates the servo motor to perform a predetermined movement (X-100.Y-100.) At a predetermined speed (F100), and when completed, the digestion operation according to steps 40 to 54 is repeated again.

As described above, when the NC machining program is present in the digestion buffer 20, the route A is passed, and when the NC machining program is exhausted, the contents of the supply buffer 16 are transferred to the digestion buffer 20 in step 44. Has been done.

FIG. 18 shows the AP side 1 of the NC device with built-in AP.
6 is a timing chart showing the timings of 0 and the NC side 22. In a built-in AP type NC device, normally one CPU 30
Performs AP side processing and NC side processing. Generally, the NC side process has a high priority, and the AP process is executed by utilizing the idle time. In the steady state shown in FIG. 18A, while the NC side (digestion side) is digesting (A1 to An), the AP side (supply side) uses the idle time to execute the next NC machining program. (B) is created. And
When the digestion (An) on the NC side ends, the next data (B1) can be digested immediately from the next timing.
It is devised so that there is no interruption of commands between buffers.

One block on the NC side (for example, A
When the interpolation time of 1) is long (the movement amount is large or the tool feed speed is small), the time until the start of the next block (A2) becomes long, and the running time on the AP side increases accordingly. On the contrary, when the interpolation time of one block on the NC side is short (the movement amount is small or the tool feed speed is large), the time until the start of the next block is shortened, and the running time on the AP side is narrowed accordingly. On the AP side, NC machining programs can be created in a single time for simple shapes (for example, sliced quadrangular shapes), but for complex shapes (for example, pocket irregular shapes), a long calculation time is required. It costs.

Further, FIG. 20 is a block diagram showing the structure of a conventional NC device for controlling a machine tool. In the figure, 72 is a communication means, 73 is a reception buffer, 74 is a program analysis means, and 75 is a program analysis means. Interpolation means, 76
Is a speed calculation unit, 77 is a drive unit, and 71 is an NC device including the above units.

Next, the operation will be described. FIG. 21 is a flowchart showing the operation of the NC device shown in FIG. First, when the NC device 71 is cycle-started, a machining program is received from the tape reader or computer (not shown) connected to the NC device 1 into the reception buffer 73 via the communication means 72 (S78). Next, the received machining program is analyzed by the program analysis means 7
4 analyzes (S79), and the speed calculation processing 76 calculates the tool feed (interpolation) speed from the analysis result of the program analysis means 74 (S80). Next, the interpolation means 75 executes interpolation processing from the analysis result of the program analysis means 74 and the calculation result of the speed calculation means 76 (S81), and the drive unit 77 drives the motor based on the interpolation data of the interpolation means 75. (S8
2) The machine tool (not shown) was controlled.

In addition, as reference technical documents related to the present invention, "numerical control method" disclosed in Japanese Patent Laid-Open No. 1-320505 and "Numerical controller" disclosed in Japanese Patent Laid-Open No. 59-116809. ], JP-A-60-93
There is a "data input / output device of an application system in a numerical controller" disclosed in Japanese Patent No. 513, and a "synchronous operation method for copying machining" disclosed in Japanese Patent Laid-Open No. 62-120953.

[0016]

Since the digestion operation of the conventional NC device (FIG. 16) during NC operation has been processed as described above, there are problems such as scratches called cutter marks. This problem will be described in detail with reference to the above conventional example.

That is, the AP side 10 on the supply side and the external NC
While the machining program creating device 12 is processing a shape that requires a great deal of time (for example, a ball end mill three-dimensional machining shape), the supply side time is insufficient as shown in FIG. 18B, and the NC side 22 on the digesting side becomes An. It will be in the state of being kept waiting with B1. Then, in the case of the cutting command, the command is completely interrupted, and as shown in the tool locus diagram shown in FIG.
(G10Xx2Yy2Ff2;) stops at the end point and the tool is rotating during that time, so the next block B1 (G03X
x3Yy3Ii3Jj3;) has a scratch called a cutter mark.

The state in which the NC side 22 is kept waiting is shown in FIG.
Explaining with reference to the flowchart shown in FIG. 7, the digestion buffer 20 is empty by the digestion operation on the NC side 22 and the supply buffer 16 is empty, so that the completion state continues for a while immediately after passing through the B route. ..

Further, since the conventional NC device (FIG. 20) is configured as described above, in cutting the minute line segment data in the BTR operation, the processing program amount consumed by the cutting is supplied by the communication means. When the amount exceeds the machining program amount, there is a problem that the cutting is temporarily stopped and the workpiece has a scratch called a cutter mark.

The present invention has been made in order to solve the above problems, and intentionally changes the timing to wait for the completion of setting of the buffer by the digestion operation on the NC side to easily interrupt the cutting feed command. A first object of the present invention is to obtain an NC device that eliminates and prevents the generation of cutter marks.

Further, even if the machining program amount consumed by the cutting becomes larger than the machining program amount supplied by the communication means, it is possible to obtain an NC device in which the cutting is temporarily stopped and the workpiece is not provided with a cutter mark. Is the second purpose.

[0022]

An NC device according to the present invention includes a supply buffer for storing a plurality of blocks of a numerical control machining program supplied from an automatic programming device or an external input / output device, and a machining program from the supply buffer. An NC having an intermediate buffer to be transferred, a digestion buffer to which a machining program is transferred from the intermediate buffer, and a numerical control unit for taking out a numerical control machining program from the digestion buffer and executing numerical control to operate a drive unit. In the device, the numerical control section includes a final data determination means for the digestion buffer, an empty determination means for the intermediate buffer, a fast-forward determination means, a digestion buffer outside the final data, an intermediate buffer empty, and numerical control during fast-forwarding. Locking means for interlocking the block execution start of the machining program It is intended to Bei.

Further, a supply buffer for storing a plurality of blocks of numerical control machining programs supplied from an automatic programming device or an external input / output device, an intermediate buffer to which the machining programs are transferred from the supply buffer, and machining from the intermediate buffer. The digestion buffer to which the program is transferred, the numerical control unit that takes out the numerical control machining program from the digestion buffer and executes the numerical control to operate the drive unit, the cutting feed decrease possibility flag and the speed decrease coefficient parameter set by the operator In the NC device having the above-mentioned numerical control unit, the final data determination means of the digestion buffer, the empty determination means of the intermediate buffer, the cutting feed determination means, the determination means of the cutting feed decrease possibility flag, and the digestion buffer are the final data. Outside, the intermediate buffer is empty, the cutting feed is , In which and a control means for reducing by multiplying the speed reduction coefficient parameter a tool feed rate of cutting feed reduction possibility flag ON at numerical control machining program.

Further, a receiving buffer for receiving the machining program through the communication means, a program analyzing means for analyzing the machining program received by the receiving buffer, and a control speed calculated based on the analysis result of the program analyzing means. In an NC device for controlling a machine tool or the like, which comprises a speed calculation means for controlling the machine tool and an interpolation means for executing an interpolation process from the results of the speed calculation means and the program analysis means,
The remaining amount of the machining program received in the reception buffer via the communication means is detected, the velocity override is calculated from the remaining amount of the machining program, and the velocity override information is provided to the velocity calculation means for changing the machining speed. It is provided with a speed override output means for outputting.

Further, a receiving buffer for receiving the machining program via the communication means, a program analyzing means for analyzing the machining program received by the receiving buffer, and a control speed calculated based on the analysis result of the program analyzing means. In an NC device for controlling a machine tool or the like, which comprises a speed calculation means for controlling the machine tool and an interpolation means for executing an interpolation process from the results of the speed calculation means and the program analysis means,
A minute line segment length, communication speed, and the number of characters per block which are preset in the memory by the data setting means are provided by setting the minute line segment length, the communication speed, the number of characters per block, and the like. Clamp speed calculation means for calculating the clamp speed based on the data such as the above, and outputting the clamp speed information to the speed calculation means for limiting the processing speed.

Further, a receiving buffer for receiving the machining program through the communication means, a program analyzing means for analyzing the machining program received by the receiving buffer, and a control speed calculated based on the analysis result of the program analyzing means. In an NC device for controlling a machine tool or the like, which comprises a speed calculation means for controlling the machine tool and an interpolation means for executing an interpolation process from the results of the speed calculation means and the program analysis means,
An average character number detecting means for detecting the average number of characters per block from the processing program received in the receiving buffer; an effective receiving speed calculating means for calculating an effective receiving speed from the number of characters received in the receiving buffer; Based on the data from the average minute line segment length detection means for detecting the average minute line segment length from the analysis result of the program analysis means, the average character number detection means, the effective reception speed calculation means, and the average minute line segment detection means. A clamp speed calculating means for calculating the clamp speed is provided.

Further, a receiving buffer for receiving the machining program via the communication means, a program analyzing means for analyzing the machining program received by the receiving buffer, and a control speed calculated based on the analysis result of the program analyzing means. In an NC device for controlling a machine tool or the like, which comprises a speed calculation means for controlling the machine tool and an interpolation means for executing an interpolation process from the results of the speed calculation means and the program analysis means,
Detects fast-forward from the program analysis means, detects the remaining amount of the machining program received in the reception buffer via the communication means, and when the remaining amount of the machining program becomes a predetermined value or less, On the other hand, it is provided with an interpolation control means for outputting an interpolation interruption command and outputting an interpolation restart command to the interpolation means when the remaining amount of the machining program exceeds a predetermined value.

[0028]

In the NC device according to the present invention, an intermediate buffer is provided between the supply buffer and the digestion buffer, and when the NC is operated,
The NC side always determines the empty state of the intermediate buffer, and if it is empty, the block to be executed next (for example, B1 in FIG. 19).
If is fast forward (G00 mode), the block execution start is interlocked, the intermediate buffer is waited for via the supply buffer, and then the timing is adjusted so that block execution is started. That is, the block execution start interlock means in the fast feed (G00 mode) first waits until the intermediate buffer is filled, and then returns to the normal processing so that the cutter mark is not attached to the subsequent cutting feed block. It should be noted that there is no cutter mark in the block because it is not cut because it is fast-forwarding even after waiting until the intermediate buffer is filled.

If the block to be executed next (for example, B1 in FIG. 19) is cutting feed (G01, G02, G03 mode), the tool feed speed is automatically reduced.
As a result, the 1-block interpolation time is lengthened, the supply side executes the machining program for NC in the supply buffer until the time required for setting, and if the intermediate buffer is filled via the supply buffer, it returns to the commanded tool feed speed. Adjust. That is, the means for reducing the interpolation speed during cutting feed (G01, G02, G03 modes) allows the intermediate buffer to be filled during interpolation of the reduced block,
After it is filled, by returning to the normal processing, the cutter mark will not be attached in the subsequent cutting feed block.

Further, in the NC device according to the present invention, the speed override output means calculates the cutting speed override from the remaining amount of the machining program in the reception buffer, and controls the cutting speed via the speed calculation means.

Further, data such as the minute line segment length, the communication speed, and the number of characters per block is stored in the memory in advance by the data setting means, and the clamp speed calculation means reads the data from the memory to obtain the clamp speed. Is calculated and the cutting speed is limited via the speed calculation means.

Further, the average character number detecting means detects the average number of characters per block from the processing program received in the receiving buffer, and the effective receiving speed calculating means determines the effective number from the number of characters received in the receiving buffer. The receiving speed is calculated, and the average minute line segment length detecting means detects the average minute line segment length from the analysis result of the program analyzing means. The clamp speed calculation means calculates the clamp speed based on the data from the average character number detection means, the effective reception speed calculation means, and the average minute line segment length detection means, and limits the cutting speed through the speed calculation means.

Further, when the interpolation control means determines that the remaining amount of the processing program in the reception buffer is less than the predetermined value, GO
After executing, the interpolation interruption command is output to the interpolating means, and when the remaining amount of the machining program exceeds the preset value, the interpolation restart command is output to the interpolating means to temporarily stop the fast-forwarding. ..

[0034]

【Example】

[Embodiment 1] An embodiment of an NC device according to the present invention will be described below with reference to the drawings. The hardware configuration is exactly the same as that of the conventional NC device with built-in AP shown in FIG. FIG. 1 is a block diagram showing a signal flow in the case of NC operation. In the figure, 10 is the AP side,
At the time of starting the NC operation, in the AP input mode, the NC machining program is generated and supplied, and the supply buffer 16 described later is used.
Set to. Reference numeral 12 denotes an external NC machining program creation device, which is generally called an external input / output device, which generates and supplies a machining program for NC when starting the NC operation and applies it to an input / output unit 14 described later. Reference numeral 14 is an input / output unit, NC
When the operation is started, in the external device input mode, the external NC machining program creating device 12 is activated, the NC machining program which is the output data thereof is input, a parity check or the like is performed, and it is set in the supply buffer 16 described later.

Reference numeral 16 is a supply buffer, which is an NC machining program storage area of a plurality of blocks, and which is generated by the AP side 10 or the external NC machining program creating device 12.
The machining program for use is stored one block at a time, and when it is full, it is transferred to the intermediate buffer 18, which will be described later. Generally after transfer,
In the empty state, data is requested to the AP side 10 or the external NC machining program creating device 12, and the blocks are again accumulated one by one.

Reference numeral 18 denotes an intermediate buffer, which is newly provided in the present invention, and transfers the NC machining program from the supply buffer 16 to the NC digestion program storage area of a plurality of blocks and transfers it to the digestion buffer 20 described later. .. Generally, after the transfer, the data becomes empty, and the data is again requested to the supply buffer 16. Further, the empty state information of the intermediate buffer 18 is sent to the NC side 22 which will be described later and is used for timing adjustment of the block execution start and the like. Reference numeral 20 denotes a digestion buffer, which transfers a machining program for NC from the intermediate buffer 18 in a plurality of NC machining program storage areas, sends data block by block to the NC side 22 described later, and becomes empty when digested. Then, the data is again requested to the intermediate buffer 18.

Reference numeral 22 denotes the NC side. The machining program for NC is taken out block by block from the digestion buffer 20, analyzed, and interpolation calculation or the like is performed corresponding to the tool feed speed. In addition, the empty state of the intermediate buffer 18 is determined, the block execution start is interlocked, and the tool feed speed is reduced to easily eliminate the break in the cutting feed command and prevent the generation of the cutter mark. Further, it also notifies the AP side 10 or the external NC machining program creation device 12 of a control signal such as NC operation start. Reference numeral 24 is a drive unit which drives the servo motor 24a by executing amplification of numerical control data interpolated on the NC side 22 and the like.

Reference numeral 26 is a key data input unit, where an operator sets various parameters of the NC device. Reference numeral 28 denotes a cutting feed reduction parameter, which is newly provided in the present invention, and has a configuration including a cutting feed reduction permission flag fg and speed reduction coefficients k1 to kn for each block. Set via.

Next, the extinguishing operation of the NC side 22 during NC operation will be described with reference to the flow chart shown in FIG. First, the NC side 22 causes the AP side 10 or the external NC machining program creation device 12 to start the NC operation, generate the NC machining program, and create the supply buffer 16.

Therefore, it is judged whether the digestion buffer 20 is empty (S10).
Jump to 6 and, conversely, if empty, intermediate buffer 18
Is determined (S12). If it is empty here, jump to step 16 through route C, and conversely,
If it is not empty, the contents of the intermediate buffer 18 are digested in the buffer 2
It is transferred to 0 (S14). Next, it is judged whether or not the intermediate buffer 18 is empty (S16). If not empty, the route jumps to the step 21 through the D route, and if empty, the supply buffer 1
An empty judgment of 6 is made (S18). Here, if it is empty, it goes through the D route and jumps to step 21, and if it is not empty, the contents of the supply buffer 16 are transferred to the intermediate buffer 18 (S20).

Next, it is judged whether or not the digestion buffer 20 is empty (S21). If it is empty, the process immediately ends through the E route. On the contrary, if it is not empty, it is determined whether the content of the digestion buffer 20 is the final data. A judgment is made (S22). The purpose of this determination is to prevent a deadlock when the intermediate buffer 18 is empty. Here, when the digestion buffer 20 is the final data, there is no meaning to reduce the interlock at the start of block execution and the tool feed speed, so the process branches to the normal processing step 50 through the F route, and conversely it is not the final data. If so, the process proceeds to step 24. The method of determining the final data in the digestion buffer 20 is determined by whether or not a code called end of record indicating the end of the NC machining program is present in the digestion buffer 20.

Next, it is judged whether the intermediate buffer 18 is empty, which is a feature of the present invention (S24). If it is not empty, the process branches through the F route to step 50 which is a normal process. One block (for example, G00X-100 .; or G01X-100.Y-100.F100;) of the NC machining program is taken out from the digestion buffer 20 (S26).

Next, it is judged whether the cutting feed or the fast feed (S28). If the fast feed (G00 mode) is performed, the block execution start, which is a feature of the present invention, is interlocked (S30), and the E route is passed. Processing is terminated without executing interpolation. This process is performed in step 20.
The process is repeated until the intermediate buffer 18 is filled via the supply buffer 16, and after filling, the block execution is started from step 24 through the F route and after step 50 which is normal processing.

On the other hand, cutting feed (G01, G02, G03
Mode), the content of the cutting feed decrease possibility flag fg of the cutting feed parameter 28 set by the operator is O.
Whether it is N or not (S31), if it is ON, the tool feed speed lowering process which is a feature of the present invention is performed (S32). On the contrary, if it is OFF, the process branches to step 52, and the tool feed lowering process is executed. Not performed. The purpose of this judgment is a small number, but the cutting conditions change when the tool feed speed is reduced depending on the material of the work piece, and the material that adversely affects the cutting surface is equal to or higher than the cutter mark (for example, aluminum material with high ductility). ) Is to be rescued.

In the above step 32, the commanded tool feed speed is reduced each time it passes. In this example,
The cutting feed reduction parameter 28 set by the operator is multiplied by the speed reduction coefficient k for each block and the commanded tool feed speed to obtain a new tool feed speed as follows. Reduced tool feed rate = command tool feed rate * speed reduction coefficient k The speed reduction coefficient k is k1 for the first block (first pass of step 32), k2 for the second block (second pass of step 32), ... kn is used after the nth block (nth time after passing through step 32). It is usually set by the operator according to the agreement of 100%>k1>k2>...>kn> 0%. For example, if the speed reduction coefficients k1 = 50% and k2 = 25%, when the command tool feed speed is F100, the tool feed speed decreases like F50 in the first block and F25 in the second block.

After the tool feed speed is reduced in step 32, the complementary calculation is executed corresponding to the tool feed speed (S5
2) As a result, the one-block interpolation time becomes long, and it takes time until the NC machining program of the supply buffer 16 is set on the supply side, and it is possible to prevent interruption of commands on the digestion side. This process is repeated until the intermediate buffer 18 is filled via the supply buffer 16 in step 20 above, and after filling, the route F is passed from step 24 to the tool feed speed instructed in step 50 and subsequent steps which is normal processing. It is for returning.

In the above step 50, one block of the NC machining program is taken out from the digestion buffer 20 by the normal processing route (for example, G01X-100.Y-10).
0. ;). Then, in the next step 52, the movement amount (X-100.Y-10) is corresponding to the tool feed speed (F100).
0. ) Is performed. Also, step 3 above
Blocks in which the tool feed speed has decreased in 2 (for example, command F
Interpolation calculation of F50) of 50% of 100 is also performed. afterwards,
Output the interpolated data to the drive unit 24 (S54)
A series of processing ends. After that, the drive unit 24 causes the servo motor 24a to move a certain distance (X-100.Y-100) at a predetermined speed (F100 or F50), and when the movement is completed, the above steps 10 to 54 are repeated.
The digestive action of is repeated.

As described above, the contents of the intermediate buffer 18 are transferred to the digestion buffer 20 through the C route when there is the NC machining program in the digestion buffer 20 and through step 14 when there is no NC machining program. Further, when the NC machining program is present in the intermediate buffer 18, the contents of the supply buffer 16 are transferred to the intermediate buffer 18 through step 20 when the NC machining program runs out. When the intermediate buffer 18 is not empty, the F route is taken and step 5
The normal one block digestion operation after 0 is performed. If the intermediate buffer 18 is empty, if fast-forwarding (G00 mode), the process goes through step 30, the block execution start is interlocked, and cutting feed (G01, G02, G03 mode).
If so, the tool feed speed is decreased through step 32, and it takes time until the NC machining program of the supply buffer 16 is set on the supply side so as to eliminate the interruption of the instruction on the digestion side and simplify the cutter mark prevention. Running.

FIG. 3 shows the NC with built-in AP according to the present invention.
6 is a timing chart showing the timing of the AP side 10, the intermediate buffer 18, and the NC side 22 of the device. In the NC device with built-in AP, as in the conventional device, one CPU 30
Side processing and NC side processing are performed. Generally, the NC side process has a high priority, and the AP process runs using the idle time.

In the steady state shown in FIG. 3 (a), NC
While the side (digestion side) is digesting (A1 to An), the following NC machining program (B) is already stored in the intermediate buffer 18, and at the same time, the AP side (supply side) uses the idle time. The next NC machining program (C) is created. Then, when the digestion (An) on the NC side 22 is finished, the next data (B1) can be digested immediately from the next timing so that the interruption of the command between the buffers does not occur.

One block on the NC side (for example, A
When the interpolation time of 1) is long (the movement amount is large or the tool feed speed is small), the time until the start of the next block (A2) becomes long, and the running time on the AP side increases accordingly. On the contrary, when the interpolation time of one block on the NC side is short (the movement amount is small or the tool feed speed is large), the time until the start of the next block is shortened, and the running time on the AP side is narrowed accordingly. Also, on the AP side, NC machining programs can be created in a single time for simple shapes (for example, sliced quadrangular shapes), but for complex shapes (for example, pocket atypical shapes), a long calculation time is required. It costs.

Supply side time shortage state G0 shown in FIG. 3 (b)
In the 0 mode, the intermediate buffer 18 is empty and A
When the P side 10 is still creating the next NC machining program (B), at the part of t1, if the NC side 22 has A1 to A
If n is executed, a break in the command may occur between the cutting feed An and the cutting feed B1, and a cutter mark may occur. As a preventive measure, A1 fast forwards (G00
Mode), the AP side 10 completes the creation of the next NC machining program (B), and the NC side 22 until the t2 portion at which the NC machining program (B) is transferred to the intermediate buffer 18.
Interlocks the execution of A1
The following NC machining program (B) is entered in t2, and the digestion operation of A1 is started, cutting feed An and cutting feed B1.
The break of the command is not generated between and, and the cutter mark is prevented. The fast-forward (G00) block is shown in FIG. 4A even if the intermediate buffer 18 is filled.
Since the cutting is not performed as in the tool locus diagram of the G00 block, there is no cutter mark in the block.

Supply side time shortage state G0 shown in FIG. 3 (c)
Intermediate buffer 1 in 1, G02, G03 mode
When 8 is empty and the AP side 10 is creating the next NC machining program (B), at t3, if the NC side 22
When A1 to An are interpolated according to the command speed, the command may be interrupted between the cutting feed An and the cutting feed B1, and a cutter mark may be generated. As a preventive measure, when A1 is cutting feed (G01, G02, G03 mode), the AP side 10 completes the creation of the next NC machining program (B), and the NC machining program (B) is transferred to the intermediate buffer 18. The NC side 22 reduces the tool feed speed until the time t4, which increases the interpolation time accordingly. As a result, when the next NC machining program (B) has been created on the AP side 10, the NC side 22 is still executing the A interpolation processing. Then, by transferring to the intermediate buffer 18 at the time t4, a steady state is set, and the interruption of the command is not generated between the cutting feed An and the cutting feed B1, and the cutter mark is prevented.

By reducing the tool feed rate, the tool feed rate is lowered only in the middle as shown in the tool locus diagram of G01, G02 and G03 blocks in FIG. 4 (b). There is no break in the command between them and no cutter mark is attached. When the A1 execution is interlocked in the t3 portion shown in FIG. 3C as in the G00 mode of FIG. 3B, the cutting feed Zn and the cutting feed A1
Since a break in the command occurs between the and, and a cutter mark is attached, the processing differs for A1 fast feed and cutting feed.

As a limit of the present invention, the cutting feed (G01,
Even if the tool feed speed is reduced in the G02 and G03 modes), the supply side cannot set the NC machining program in the supply buffer 16, and as a result, the cutter mark may not be completely prevented. However, this is a peculiar case, and the NC mark can be sufficiently prevented by the simple method according to the present invention, although it has a certain limit as compared with the case where a complicated and large-scale NC device including the supply side is manufactured for this countermeasure.
It is more beneficial to build the device.

Further, as shown in FIG. 5 (a), when retreating from the cutting surface by fast-forwarding (G00 mode) by the NC machining program during internal machining of the workpiece, in the conventional device, from the cutting feed to fast-forwarding. Since it is an in-position check (deceleration processing to zero speed) when it is switched to, the cutter mark is small, but in the present embodiment, the block start interlock happens to occur and the cutter mark may become large. However, this is a case of a unique NC machining program, and usually the approach / retract is set to the cutting feed (G02 or G03 mode) as shown in FIG. 5 (b) in order to clean the cutting surface. is there. It is not a good idea to implement the peculiar case countermeasure shown in FIG. 5A because the NC device becomes complicated.

[Embodiment 2] FIG. 6 shows an NC according to the present invention.
It is a block diagram which shows the structure of an apparatus (Example 2). In the figure, 71 to 75 and 77 indicate exactly the same devices as the conventional device shown in FIG. 20, and perform the same operation. Here, reference numeral 83 is a speed override output means for calculating the cutting speed override from the remaining amount of the processing program in the reception buffer and outputting the override information to the speed calculation means 76a. Reference numeral 76a is a speed calculation means for calculating the cutting speed from the result of the program analysis means 74 and the result of the speed override output means 83.

Next, the operation will be described. FIG. 7 is a flowchart showing the operation of the NC device shown in FIG. In the figure, when the number control device 71 is cycle-started, a machining program is received from the tape reader or the computer (not shown) connected to the NC device 71 into the reception buffer 73 via the communication means 72 (S84). ..
Next, the program analyzing means 74 analyzes the received machining program (S85), and the speed override means 83
Calculates the cutting speed override from the remaining amount of the machining program in the reception buffer 73 according to the following equation 1 (S86).

[0059]

[Equation 1]

Here, A is the override, B is the current value of the remaining amount of the machining program, and C is the boundary value of the remaining amount of the machining program for which the override is effective, and these are determined in advance. For example, the current value B of the remaining amount of the machining program is 100 bytes, and the boundary value C of the remaining amount of the machining program is 20.
If it is 0 bytes, the override A is 50%. Further, when the current value B of the remaining amount of the machining program is 300 bytes and the boundary value C of the remaining amount of the machining program is 200 bytes, the override A is 150%, but when it exceeds 100%, the override A is 100%. And

Next, the speed calculation means 76a calculates the tool feed speed from the result of the program analysis means 74 (S8).
7) The speed calculation means 76a determines whether or not the override, which is the output result of the speed override output means 83, is 100% (S88). If the override is 100%, the tool feed rate calculated in step 87 is output to the interpolation means 75. On the contrary, when the override is less than 100%, the override speed is calculated according to the following equation 2 (S89).

[0062]

[Equation 2]

Here, A is the override, D is the override speed, and E is the tool feed speed. Next, the interpolation means 7
5 executes interpolation processing from the analysis result of the program analysis means 74 and the calculation result of the speed calculation means 76a (S90), the drive unit 77 drives the motor based on the interpolation data of the interpolation means 75 (S91), and Control a machine tool not shown.

Although the boundary value C of the remaining amount of the machining program is fixed in the above embodiment, the value may be changed by operating the NC device, and even if such a change is made, The same effect as that of the embodiment is obtained.

[Third Embodiment] FIG. 8 shows an NC according to the present invention.
It is a block diagram which shows the structure of an apparatus (Example 3). In the figure, 71 to 75 and 77 indicate exactly the same devices as the conventional device shown in FIG. 20, and perform the same operation. Here, 92 is data setting means for setting the minute line segment length, communication speed, the number of characters per block, and the like, and 93 stores data such as the minute line segment length, communication speed, and the number of characters per block. A memory for storing 94, a clamp speed calculating means for calculating a clamp speed which is an upper limit value of the cutting speed based on the minute line segment length and communication speed stored in the memory 93 and the number of characters per block, 76
Reference numeral b is a speed calculation means for calculating the cutting speed from the result of the program analysis means 74 and the result of the clamp speed calculation means 94.

FIG. 9 is an example of a screen display on the display device of the NC device shown in FIG. In the figure, 101 is a display frame, 102 is an input / output device parameter display screen, 103 is a data setting section, 104 is a menu display section and menu keys for displaying operation menus such as “input”, “output”, and “copy”, and 105 is A communication speed, 106 is the number of characters per block, 107 is a minute line segment length, 108 is a stop bit, and 109 is a character length setting item.

Next, the operation will be described. FIG. 10 is a flowchart showing the operation of the NC device shown in FIG. First, the operator operates the NC device, and the communication speed (105) of the display screen shown in FIG. 9, the number of characters / block (106), the minute line segment length (mm) (107), the stop bit (108), When each character length (109) is set (S110), the data setting means 92 stores each setting data in the memory 93. Next, when the NC device 71 is cycle-started, the machining program is received from the tape reader or the computer (not shown) connected to the NC device 71 into the reception buffer 73 via the communication means 72 (S111), and is received. The machining program is analyzed by the program analysis means 74 (S112), and then the clamp speed calculation means 94 uses the memory 93 to obtain the communication speed, the stop bit, the character length, the number of characters per block, and the minute line segment length data. Is read out and the clamp speed is calculated according to the following Equation 3 (S11
3).

[0068]

[Equation 3]

Here, J is a clamp speed, F is a minute line segment length, G is a communication speed, H is the number of characters per block, L is a character length, M is a stop bit, and K is a coefficient. (L + M + 1) represents the number of bits of one character on the communication path. Next, the speed calculation means 76b calculates the tool feed speed similarly to the conventional device (S114).

Further, the speed calculation means 76b compares the clamp speed, which is the calculation result of the clamp speed calculation means 94, with the tool feed speed (interpolation speed> clamp speed) (S11).
5) If the tool feed speed is equal to or lower than the clamp speed, the tool feed speed is output to the interpolation means 75. On the contrary, when the tool feed speed is higher than the clamp speed, the tool feed speed is replaced with the clamp speed (S116) and output to the interpolation means 5. Next, the interpolation means 75 causes the program analysis means 74.
Interpolation processing is executed from the analysis result of the above and the calculation result of the speed calculation means 76b (S117), and the drive unit 77 drives the motor based on the interpolation data of the interpolation means 75 (S118).
A machine tool (not shown) is controlled.

[Embodiment 4] FIG. 11 shows N according to the present invention.
It is a block diagram which shows the structure of C apparatus (Example 4). In the figure, 71 to 75 and 77 indicate exactly the same devices as the conventional device shown in FIG. 20, and perform the same operation. Here, 93a is a memory for storing the clamp speed calculated by the clamp speed calculating means 94a, and 120 is an average character number detecting means for detecting the average character number per block from the machining program received in the receiving buffer 73. , 121 is an effective reception speed calculation means for calculating the effective reception speed from the number of characters received in the reception buffer 73, and 122 is an average minute line segment length detection for detecting an average minute line segment length from the analysis result of the program analysis means 74. It is a means. 94a is the average character number detection means 120
Clamp speed calculation means for calculating the clamp speed from the results of the effective reception speed calculation means 121 and the average minute line segment length detection means 122, and 76b is the speed calculation means, which has the same configuration as that shown in FIG. , Perform the same operation.

Next, the operation will be described. 12 is shown in FIG.
4 is a flowchart showing the operation of the NC device shown in FIG.
When the NC device 71 is cycle-started, the receiving buffer 7 is connected from the tape reader or the computer (not shown) connected to the NC device 71 via the communication means 72.
The machining program is received at 3 (S123). Next, the program analyzing means 74 analyzes the received machining program (S124), and the average character number detecting means 120 counts the number of characters per block of the machining program received in the receiving buffer 73, and, for example, 1
The average number of characters for each 00 block is calculated (S12
5) Notify the clamp speed calculation means 94a.

Next, the effective reception speed calculation means 121 calculates the effective value of the reception speed, which is the number of characters received per second, for example, by counting the number of characters received for each 100 blocks and the reception time ( S126), and notifies the clamp speed calculation means 94a. Next, the average minute line segment length detection means 122 detects the minute line segment length between one blocks from the analysis result of the program analysis means 74, and, for example, 10
The average minute line segment length is calculated for each 0 block (S12
7) Notify the clamp speed calculation means 94a. After that, the clamp speed calculation means 94a outputs the average character per block which is the output result of the average character number detection means 120 and the effective reception speed and average minute line segment length detection means 122 which is the output result of the effective reception speed calculation means 121.
The clamp speed is calculated from the average minute line segment length, which is the output result of (4), according to the following expression 4 (S128).

[0074]

[Equation 4]

Here, J is the clamp speed, F is the minute line segment length, G is the communication speed, H is the number of characters per block, and N is the receiving speed. Next, the clamp speed calculation means 94a reads the clamp speed of the previous calculation result stored in the memory 93a and compares it with the clamp speed which is the calculation result of the above formula 4 (S129). If a certain clamp speed is lower than the clamp speed that is the previous calculation result, the current clamp speed is stored in the memory 9
It is stored in 3a (S130). By the above operation, the minimum value of the clamp speed is output to the speed calculation means 76b.

After that, the speed calculation means 76b calculates the tool feed speed similarly to the conventional apparatus (S131), and the speed calculation means 76b compares the clamp speed and the tool feed speed which are the calculation results of the clamp speed calculation means 94 (interpolation). (Speed> clamp speed) (S132), and when the tool feed speed is equal to or lower than the clamp speed, the tool feed speed is output to the interpolation means 75. On the contrary, when the tool feed speed is higher than the clamp speed, the tool feed speed is replaced with the clamp speed (S1
33) Output to the interpolation means 75. Next, the interpolation means 75 causes the analysis result of the program analysis means 74 and the speed calculation means 76.
Interpolation processing is executed from the calculation result of b (S134), and the drive unit 77 drives the motor based on the interpolation data of the interpolation means 75 (S135) to control a machine tool (not shown).

[Embodiment 5] FIG. 13 shows N according to the present invention.
It is a block diagram which shows the structure of C apparatus (Example 5). In the figure, 71 to 75 and 77 indicate exactly the same devices as the conventional device shown in FIG. 20, and perform the same operation. Here, 140 detects the remaining amount of the machining program received in the reception buffer, detects GO from the program analysis means, and if the remaining amount of the machining program is below a predetermined value after GO detection, GO is After the execution, the interpolation control means outputs an interpolation interruption command to the interpolation means 75a, and outputs an interpolation restart command to the interpolation means 75a when the remaining amount of the machining program exceeds a predetermined value. Reference numeral 75a is an interpolating means for performing interpolation processing based on the tool feed speed information from the speed calculating means 76 and the analysis result of the program analyzing means 74, and for interrupting and resuming the interpolation processing by the interpolation control information from the interpolation control means 140.

Next, the operation will be described. 14 is the same as FIG.
4 is a flowchart showing the operation of the NC device shown in FIG.
First, when the NC device 71 is cycle-started, the machining program is received from the tape reader or the computer (not shown) connected to the NC device 71 into the reception buffer 73 via the communication means 72 (S141). Next, the received machining program is analyzed by the program analysis means 7
4 analyzes (S142), and then the speed calculation means 76 calculates the tool feed speed similarly to the conventional device (S14).
3).

Next, the interpolation control means 140 judges from the analysis result of the program analysis means 74 whether or not GO is being executed (S144). If GO is not being executed, nothing is done and the step is executed. Jump to 147. On the contrary, when GO is being executed, next, the interpolation control means 140
Compares the remaining amount of the machining program received in the reception buffer 73 with the default value (lower limit) (remaining amount of the machining program <default value (lower limit)) (S145), and the remaining amount of the machining program is less than or equal to the default value (lower limit). If it is, the interpolation control means 14
0 outputs an interpolation interruption command to the interpolation means 75a (S14
6) and then proceeds to step 147. On the contrary, if the remaining amount of the machining program is not less than the default value (lower limit), whether the remaining amount of the machining program is more than the default value (upper limit) (remaining amount of the machining program> the limited value ( upper limit))
If the remaining amount of the machining program is equal to or larger than the predetermined value (upper limit), an interpolation restart command is output to the interpolation means 75a (S151), and the process proceeds to step 19, and conversely, the remaining amount of the machining program remains. If it does not exceed the predetermined value (upper limit), nothing is done and the process proceeds to step 19.

Next, the interpolating means 75a is operated by the interpolating control means 1
It is determined whether or not there is an interpolation interruption command from 40 (S14).
7) If there is no interpolation interruption command, the interpolation means 75a executes interpolation processing from the analysis result of the program analysis means 74 and the calculation result of the speed calculation means 76 (S148), and drives based on the interpolation data of the interpolation means 75a. The unit 77 drives a motor (S149) to control a machine tool (not shown). On the contrary, if there is an interpolation stop command, the series of processing is terminated.

In the above embodiment, the default value of the remaining amount of the machining program is fixed, but the value may be changed by operating the NC device, and the same effect as in the above receiving example is obtained.

[0082]

As described above, according to the present invention, the NC
An intermediate buffer is provided between the supply buffer and the digestion buffer of the apparatus, and in the NC side processing, final data determination means of the digestion buffer, empty determination means of the intermediate buffer, and fast forward (G00
(Mode) determination means and means for interlocking the block execution start at the time of fast feed enable block execution start adjustment, and because of the interruption of the command on the supply side that supplies the NC machining program, during cutting feed, cutting There is an effect that the cutter mark generated on the surface can be easily prevented.

Further, an intermediate buffer and a speed reduction coefficient parameter set by the operator are provided between the supply buffer and the digestion buffer of the NC device, and the NC side processing includes empty determination means of the intermediate buffer and cutting feed (G01, G02). , G03
Mode) determining means and means for reducing the speed by multiplying the tool feed speed by the speed decrease coefficient parameter during cutting feed, the interpolation time can be adjusted, and the command on the supply side that supplies the NC machining program is interrupted. Therefore, there is an effect that the cutter mark generated on the cutting surface can be easily prevented during cutting feeding.

Further, the speed override output means calculates the cutting speed override from the remaining amount of the machining program in the reception buffer and controls the cutting speed via the speed calculation means, so that the cutting is digested. Even when the machining program amount is larger than the machining program amount supplied by the communication means, it is possible to prevent the cutting from being temporarily stopped and the cutter mark being attached to the workpiece with a very simple configuration.

Further, data such as the minute line segment length, the communication speed, and the number of characters per block is stored in the memory in advance by the data setting means, and the clamp speed calculating means reads the data from the memory to obtain the clamp speed. Therefore, the operator does not have to consider the optimum clamp speed for the BTR operation machining, and only needs to be aware of the operating conditions and the communication conditions. Further, since the cutting speed is controlled by using the calculated clamping speed, even when the machining program amount consumed by the cutting becomes larger than the machining program amount supplied by the communication means, the cutting is temporarily stopped and the object is not covered. This has the effect of not attaching a cutter mark to the work piece. Further, since the cutting speed is limited by the clamp speed, the deceleration is not performed during cutting, which is particularly effective when cutting a workpiece that should not be decelerated during cutting.

Further, the average character number detecting means detects the average number of characters per block from the processing program received in the receiving buffer, and the effective reception speed calculation reception is based on the number of characters received in the receiving buffer. And the average minute line segment length detecting means detects the average minute line segment length from the analysis result of the program analyzing means.
The clamp speed calculation means calculates the clamp speed based on the data from the average character number detection means, the effective reception speed calculation means, and the average minute line segment length detection means, and the cutting speed is limited using the minimum value. Therefore, there is an effect that the cutting speed can be limited by the actual operating conditions and communication conditions. In addition, the calculated clamp speed is used to control the cutting speed, so even if the amount of machining program consumed by cutting exceeds the amount of machining program supplied by the communication means, cutting will be paused. This has the effect that no cutter marks are attached to the work piece.

When the interpolation control means determines that the remaining amount of the processing program in the reception buffer is less than the predetermined value, GO
After executing, the interpolation interruption command is output to the interpolating means, and when the remaining amount of the machining program exceeds the preset value, the interpolation restart command is output to the interpolating means to temporarily stop the fast-forwarding. I am trying. That is, when the amount of machining program consumed by cutting becomes larger than the amount of machining program supplied by the communication means, after performing fast-forwarding, fast-forwarding is temporarily performed until the remaining amount of machining program in the receiving buffer becomes equal to or more than the preset value. Since it is stopped, there is an effect that a cutter mark is not attached to a work piece especially in cutting by a machining program including a fast-forward command during cutting.

[Brief description of drawings]

FIG. 1 is a block diagram showing a signal flow during operation of an NC device according to the present invention.

FIG. 2 is a flowchart showing a digestion processing operation during operation of the NC device according to the present invention.

FIG. 3 is a timing chart showing a digestion processing operation during operation of the NC device according to the present invention.

FIG. 4 is an explanatory view showing a tool locus of the NC device according to the present invention.

FIG. 5 is an explanatory diagram showing an approach / retract of the NC device according to the present invention.

FIG. 6 is a block diagram showing a configuration (Embodiment 2) of an NC device according to the present invention.

FIG. 7 is a flowchart showing an operation of the NC device shown in FIG.

FIG. 8 is a block diagram showing a configuration (Embodiment 3) of an NC device according to the present invention.

9 is an explanatory diagram showing an example of a display screen of the NC device shown in FIG.

10 is a flowchart showing an operation of the NC device shown in FIG.

FIG. 11 is a block diagram of an NC device according to the present invention (Example 4)
It is a block diagram showing.

12 is a flowchart showing an operation of the NC device shown in FIG.

FIG. 13 is a diagram showing a configuration of an NC device according to the present invention (embodiment 5).
It is a block diagram showing.

FIG. 14 is a flowchart showing an operation of the NC device shown in FIG.

FIG. 15 is a block diagram showing a hardware configuration of an NC device according to the present invention and the related art.

FIG. 16 is a block diagram showing a signal flow during operation of a conventional NC device.

FIG. 17 is a flowchart showing a digestion processing operation during operation of a conventional NC device.

FIG. 18 is a timing chart showing a digestion processing operation during operation of a conventional NC device.

FIG. 19 is an explanatory diagram showing a tool locus of a conventional NC device.

FIG. 20 is a block diagram showing a configuration of a conventional NC device.

FIG. 21 is a flowchart showing the operation of a conventional NC device.

[Explanation of symbols]

 10 Automatic Programming Side (AP Side) 12 External NC Machining Program Creation Device 14 Input / Output Section 16 Supply Buffer 18 Intermediate Buffer 20 Digestion Buffer 22 Numerical Control Side (NC Side) 24 Drive Section 26 Key Data Input Section 28 Cutting Feed Reduction Parameter 30 CPU 32 NC side ROM 34 NC side RAM 36 AP side ROM 38 AP side RAM 40 Processing program storage RAM 42 Input / output section 44 External NC processing program creation device 46 Display section 48 Drive section 71 NC apparatus 72 Communication means 73 Reception buffer 74 Program Analysis means 75 Interpolation means 75a Interpolation means 76 Speed calculation means 76a Speed calculation means 76b Speed calculation means 77 Drive section 78 Speed override output means 79 Data setting means 93 Memory 94 Clamp speed calculation means 94a Clamp Degrees calculation unit 120 the average character number detection means 121 effective reception rate calculating means 122 average minute line segments length detecting means 140 interpolation control means

[Procedure amendment]

[Submission date] April 20, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction content]

Reference numeral 42 is an input / output unit for starting NC operation, N
Switch from outside such as C operation stop , interpolation function, spindle machine
Noh input / output from 42a and key data input section 42b
Input, the NC for machining program input or the like with an external performing the. Reference numeral 44 denotes an external NC machining program creation device, which is generally called a host computer, which creates an NC machining program externally and applies it to the input / output unit 42.
This is an external input / output device, unlike the built-in AP side ROM 36 and RAM 38. Reference numeral 46 denotes a display unit, which displays the operating state on the NC side, the automatic determination data on the AP side, and the like on the display 46a. Reference numeral 48 denotes a drive unit that performs amplification processing or the like on the data numerically controlled on the NC side to drive the servo motor 48a.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0028

[Correction method] Change

[Correction content]

[0028]

In the NC device according to the present invention, an intermediate buffer is provided between the supply buffer and the digestion buffer, and when the NC is operated,
The NC side always determines the empty state of the intermediate buffer, and if it is empty, the block to be executed next (for example, B1 in FIG. 18 ).
If is fast forward (G00 mode), the block execution start is interlocked, the intermediate buffer is waited for via the supply buffer, and then the timing is adjusted so that block execution is started. That is, the block execution start interlock means in the fast feed (G00 mode) first waits until the intermediate buffer is filled, and then returns to the normal processing so that the cutter mark is not attached to the subsequent cutting feed block. It should be noted that there is no cutter mark in the block because it is not cut because it is fast-forwarding even after waiting until the intermediate buffer is filled.

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] 0029

[Correction method] Change

[Correction content]

If the block to be executed next (for example, B1 in FIG. 18 ) is the cutting feed (G01, G02, G03 mode), the tool feed speed is automatically reduced.
As a result, the 1-block interpolation time is lengthened, the supply side executes the machining program for NC in the supply buffer until the time required for setting, and if the intermediate buffer is filled via the supply buffer, it returns to the commanded tool feed speed. Adjust. That is, the means for reducing the interpolation speed during cutting feed (G01, G02, G03 modes) allows the intermediate buffer to be filled during interpolation of the reduced block,
After it is filled, by returning to the normal processing, the cutter mark will not be attached in the subsequent cutting feed block.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0051

[Correction method] Change

[Correction content]

One block on the NC side (for example, A
When the interpolation time of 1) is long (the movement amount is large or the tool feed speed is small), the time until the start of the next block (A2) becomes long, and the running time on the AP side increases accordingly. On the contrary, when the interpolation time of one block on the NC side is short (the movement amount is small or the tool feed speed is large), the time until the start of the next block is shortened, and the running time on the AP side is narrowed accordingly. Also, simple shape in the AP side (e.g., off La <br/> chair quadrilateral) can create NC for machining program in a short period of time if, complex shape (e.g., a pocket atypical shape) if A long calculation time is required.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0057

[Correction method] Change

[Correction content]

[Embodiment 2] FIG. 6 shows an NC according to the present invention.
It is a block diagram which shows the structure of an apparatus (Example 2). In the figure, 71 to 75 and 77 indicate exactly the same devices as the conventional device shown in FIG. 20, and perform the same operation. Here, reference numeral 83 is a speed override output means for calculating the cutting speed override from the remaining amount of the machining program in the reception buffer 73 and outputting the override information to the speed calculation means 76a. Reference numeral 76a is a speed calculation means for calculating the cutting speed from the result of the program analysis means 74 and the result of the speed override output means 83.

[Procedure Amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0079

[Correction method] Change

[Correction content]

Next, the interpolation control means 140 judges from the analysis result of the program analysis means 74 whether or not GO is being executed (S144). If GO is not being executed, nothing is done and the step is executed. Jump to 147. On the contrary, when GO is being executed, next, the interpolation control means 140
Compares the remaining amount of the machining program received in the reception buffer 73 with the default value (lower limit) (remaining amount of the machining program <default value (lower limit)) (S145), and the remaining amount of the machining program is less than or equal to the default value (lower limit). If it is, the interpolation control means 14
0 outputs an interpolation interruption command to the interpolation means 75a (S14
6) and then proceeds to step 147. On the contrary, when the remaining amount of the machining program is not less than the default value (lower limit) , the process proceeds to step 150, and it is determined whether the remaining amount of the machining program is more than the default value (upper limit) (remaining machining program). the amount> already value (upper limit)) and to determine in interpolation interruption command,
The remaining amount of the machining program is more than the default value (upper limit) and interpolation
If the interruption command is in progress, after outputting the interpolation restart command to the interpolation means 75a (S151), the process proceeds to step 147 , and conversely,
If the remaining amount of the machining program is not less than the predetermined value (upper limit), nothing is done and the process proceeds to step 19.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Correction target item name] Explanation of code

[Correction method] Change

[Correction content]

[Explanation of Codes] 10 Automatic Programming Side (AP Side) 12 External NC Machining Program Creation Device 14 Input / Output Section 16 Supply Buffer 18 Intermediate Buffer 20 Digestion Buffer 22 Numerical Control Side (NC Side) 24 Drive Section 26 Key Data Input Section 28 Cutting feed reduction parameter 30 CPU 32 NC side ROM 34 NC side RAM 36 AP side ROM 38 AP side RAM 40 Machining program memory RAM 42 Input / output section 44 External NC machining program creating device 46 Display section 48 Driving section 71 NC apparatus 72 Communication means 73 receive buffer 74 the program analysis means 75 interpolation means 75a interpolation means 76 speed calculating means 76a speed calculation means 76b speed calculation unit 77 driving unit 78 speed override output unit 79 data setting means 83 speed override output means 92 Day Setting means 93 memory 94 clamping speed calculating means 94a clamping speed calculating means 101 display frame 102 input-output device parameter display screen 103 data setting unit 104 menu display unit / Menu key 105 communication speed 106 character number 107 minute line segments length 108 stop bit 109 Character length setting item 120 Average character number detection means 121 Effective reception speed calculation means 122 Average minute line segment length detection means 140 Interpolation control means

[Procedure Amendment 8]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 2

[Correction method] Change

[Correction content]

[Fig. 2]

[Procedure Amendment 9]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 14

[Correction method] Change

[Correction content]

FIG. 14

Claims (6)

[Claims] 1. A supply buffer for storing a plurality of blocks of numerical control machining programs supplied from an automatic programming device or an external input / output device, an intermediate buffer to which the machining programs are transferred from the supply buffer, and machining from the intermediate buffer. In a numerical control device having a digestion buffer to which a program is transferred and a numerical control unit for taking out a numerical control machining program from the digestion buffer and executing numerical control to operate a drive unit, Final data determination means, intermediate buffer empty determination means, fast-forward determination means, digestion buffer is outside the final data, intermediate buffer is empty, and the block execution start of the numerical control machining program is interlocked during fast-forwarding. A numerical control device comprising: locking means. 2. A supply buffer for storing a plurality of blocks of numerical control machining programs supplied from an automatic programming device or an external input / output device, an intermediate buffer to which the machining programs are transferred from the supply buffer, and machining from the intermediate buffer. The digestion buffer to which the program is transferred, the numerical control unit that takes out the numerical control machining program from the digestion buffer and executes the numerical control to operate the drive unit, the cutting feed decrease possibility flag and the speed decrease coefficient parameter set by the operator In the numerical control device having the above-mentioned numerical control unit, the numerical control unit includes a final data determination means for the digestion buffer, an empty determination means for the intermediate buffer, a cutting feed determination means, a determination means for a cutting feed decrease possibility flag, and the digestion buffer Out of data, intermediate buffer is empty, cutting feed, and And a control means for reducing the tool feed speed of the machining program for numerical control by multiplying the speed decrease coefficient parameter when the cutting feed decrease possibility flag is ON. 3. A reception buffer for receiving a machining program via a communication means, a program analysis means for analyzing the machining program received by the reception buffer, and a control speed calculated based on an analysis result of the program analysis means. In a numerical control device for controlling a machine tool or the like, the speed calculation means and the interpolation means for executing interpolation processing from the results of the speed calculation means and the program analysis means are received in the reception buffer via the communication means. A residual velocity of the machining program is detected, a velocity override is calculated from the residual amount of the machining program, and velocity override output means for outputting the velocity override information to the velocity calculation means for changing the machining velocity is provided. Characteristic numerical control device. 4. A receiving buffer for receiving a machining program through a communication means, a program analyzing means for analyzing the machining program received by the receiving buffer, and a control speed calculated based on an analysis result of the program analyzing means. In a numerical controller for controlling a machine tool or the like, which comprises a speed calculation means for controlling a machine tool and an interpolation means for executing an interpolation process based on a result of the speed calculation means and the program analysis means, Is provided with data setting means for setting the number of characters, etc., and the clamp speed is calculated based on the data such as the minute line segment length, the communication speed and the number of characters per block preset in the memory by the data setting means. , A clamp speed calculator for outputting the clamp speed information to the speed calculator for limiting the machining speed A numerical control device comprising steps. 5. A receiving buffer for receiving a machining program via a communication means, a program analyzing means for analyzing the machining program received by the receiving buffer, and a control speed calculated based on an analysis result of the program analyzing means. In a numerical control device for controlling a machine tool or the like, the processing program received in the reception buffer is set to 1 An average character number detecting means for detecting the average number of characters per block, an effective receiving speed calculating means for calculating an effective receiving speed from the number of characters received in the receiving buffer, and an average fine line from the analysis result of the program analyzing means. Average minute line segment length detecting means for detecting the segment length, and the average character number detecting means A numerical control device comprising a clamp speed calculation means for calculating a clamp speed based on data from a stage, an effective reception speed calculation means, and an average minute line segment detection means. 6. A receiving buffer for receiving a machining program via a communication means, a program analyzing means for analyzing the machining program received by the receiving buffer, and a control speed calculated based on an analysis result of the program analyzing means. In the numerical control device for controlling a machine tool or the like, the fast-forwarding is detected from the program analysis means, and the speed calculation means and the interpolation means for executing interpolation processing from the results of the speed calculation means and the program analysis means are detected. The remaining amount of the machining program received in the reception buffer via the communication means is detected, and when the remaining amount of the machining program becomes a predetermined value or less, an interpolation interruption command is output to the interpolation means, And an interpolating control means for outputting an interpolating restart command to the interpolating means when the remaining amount of the interpolated amount exceeds a predetermined value. Numerical control device characterized by.