JPS6146847B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a numerical control device that processes a workpiece into a desired shape by controlling the movement of a machine tool according to control parameters such as workpiece dimensions input in advance. By simply specifying the type of pattern, the display device displays the types of control parameters required to execute the specified machining pattern in order and instructs the operator to write the necessary parameters in order. Numerical data that are sequentially input in response are stored in the memory as related to the parameters that were instructed to be written immediately before the numerical data was written, making it extremely easy to write the control parameters necessary for executing each machining pattern. The goal is to be able to do it quickly. Generally, when numerically controlling a workpiece, it is necessary to machine the workpiece with different machining patterns depending on the shape of the machined part of the workpiece. A numerical control program for moving the machining tool relative to the shape etc. must be created using a predetermined programming language. Even for workers who are well-versed in this, there is a problem in that creating a program requires a great deal of time and effort when machining a workpiece that has a large number of machining locations with different shapes. In addition, in the past, programs for executing multiple types of machining patterns according to the machining shape of the workpiece etc. by numerical control are fixedly stored, and the operator specifies the machining shape. The numerical control device displays the types of control parameters necessary for machining the specified machining shape at once by lighting a lamp, and the operator looks at this display, determines the type of control parameters required, and determines the required parameter values. By pressing a key switch, numerically controlled machining can be performed according to the shape of each machined part. There was a problem in that it took a long time to write the control parameters because the types of parameters required were displayed all at once. In other words, when the types of parameters for which numerical data must be entered are displayed all at once, as in the past, it is difficult for the operator to determine from which parameter the numerical data should be written, and the operator is forced to enter the parameters in a random order. Since there is a possibility that writing may be performed, when numerical data is input, it is necessary to input additional information indicating which parameter value the data corresponds to. Therefore, with this system, key switches for informing the numerical controller of the types of parameters into which numerical data has been input must be installed on the operation panel in a number corresponding to the types of parameters, which only makes the operation panel more complicated. Instead, you have to select and press one of the keys each time you want to enter numerical data.
There was a problem where writing parameters was troublesome. The present invention has been made in view of such conventional problems, and when the type of machining pattern is specified according to the shape of the machining location, the type of parameters required for this specified machining pattern is displayed. The parameters are sequentially displayed on the device to instruct the writing of parameters, and the parameter values input in response to this are sequentially stored in the memory as being related to the parameters for which writing was instructed immediately before the parameter values were written. It is characterized by being memorized. Furthermore, in the present invention, for control parameters that take the same value at each of a plurality of machining locations, data input is commonly performed for the multiple machining locations, and during operation, such control parameters are input to each machining location. The present invention is characterized in that control parameters are easily input by commonly using them for control. An embodiment in which the present invention is applied to a numerical control device for a grinding machine will be described below with reference to the drawings. In Figure 1, 10 is the bed of the grinding machine, and this bed 10
In front of the table 11 is the left and right direction (Y-axis direction)
The bed 10 is placed so that it can be moved in the Y-axis direction by a pulse motor 12 attached to the side surface of the bed 10. On this table 11, a headstock 15 that supports a main shaft 14 that is rotationally driven by a motor 13, and a tailstock 17 that supports a tailstock center 16 are placed.
A spindle center 18 and a drive pin 19 are fixed to the spindle 14. A multi-stage workpiece W having a plurality of machining surfaces is held between the spindle center 18 and the tailstock center 16, and is engaged with the drive pin 19. On the other hand, behind the bed 10, a grinding wheel 2 is rotatably driven by a grinding wheel drive motor 20.
A grindstone head 22 on which a grindstone 1 is mounted is guided so as to be movable in a direction perpendicular to the axis of the workpiece W (X-axis direction), and a pulse motor 23 fixed to the rear of the bed 10 and a hydraulic cylinder (not shown) It is now being moved by The pulse motors 12 and 23 are connected to pulse motor drive circuits 25 and 26, respectively, which receive command pulses from a pulse generation circuit 24, and the pulse motor drive circuit 2
When command pulses are given to 5 and 26, the grinding wheel head 22 and slide table 11 are moved according to the number of command pulses.
is moved. As a result, the relative position between the grindstone 22 and the table 11 is changed, and the workpiece W is ground.
A dresser 27 for grinding wheel correction is fixed to the side surface of the grinding wheel 7, and the grinding wheel 21 is also corrected by changing the relative position of the grinding wheel head 22 and table 11. Further, on the bed 10, at a position facing the grinding wheel 21 while holding the workpiece W, there is a setting device that measures the dimensions of the machined surface of the workpiece and sends a sizing signal when the dimension of the machined surface reaches a predetermined size. A displacement device 28 is provided, and is moved forward and backward by a hydraulic cylinder (not shown). In this embodiment, the sizing signal AS1 is outputted so that the dimension of the machined surface becomes the dimension of completion of rough grinding, and when the dimension of the machined surface becomes the dimension of completion of fine grinding and the dimension of finishing, sizing signal AS2 and
A device that outputs AS3 is used. A central processing unit 30 constitutes a numerical control device together with the pulse generation circuit 24 and the data writing device 31. It is composed of a small processing unit such as a microprocessor, and has a memory M, an address bus MAB, Connected via data bus MDB. In addition to the pulse generation circuit 24 and the data writing device 31, the central processing unit 30 includes a high-power interface 32 for exchanging signals with a high-power circuit, and a grindstone head 22 and a table 1 that can be manually operated.
An operation panel circuit 33 equipped with operation switches and the like for moving the controller 1 is connected via a data bus DB and an address bus AB. Figure 2 shows the address map of the central processing unit 30. Addresses 1 to E000 (in hexadecimal) are allocated to addresses in memory M, and addresses from E001 to
Addresses up to E800 are allocated to input/output element addresses. The memory area from address 1 to address E000 is machined using the specified machining pattern, i.e., in the case of a grinder, the specified grinding method is selected from multiple grinding methods such as sizing burnge grinding, dead stop traverse grinding, etc. A program storage area for storing control programs for processing objects, MDI programs for writing control data according to commands from the data writing device 31, and a data storage area for storing temporary data. The program storage area, which stores control parameters for machining workpieces using the grinding method that is The parameter storage area consists of core memory. Further, a data storage area for storing temporary data is constituted by a volatile semiconductor memory RAM. As shown in Figure 3, the parameter storage area consisting of the core memory is provided with 30 sets of stack tables, and each of these stack tables stores the grinding method and the control parameters necessary for this grinding method. I'm starting to remember it. In this embodiment, control data for three different multi-stage workpieces are stored in this stack table, and up to 10 sets of grinding methods and control parameters can be stored for one workpiece. can. Therefore, as long as the workpiece has 10 or less machined surfaces, it is possible to machine a workpiece having any number of machined surfaces. Note that the control program storage area also stores an automatic operation program for fully automatically machining a multi-stage workpiece by reading out a grinding method and control parameters according to the machining surface of the workpiece. Data representing the grinding method is stored in the third data area of the stack table, address 2, as shown in FIG. 4, and control parameters are stored in addresses 3 and onwards. In addition, addresses 0 and 1
The address is a control flag used to determine whether or not the stack area stores parameters. The data writing device 31 is a device for writing the grinding method and control parameters into this stack table, and an example of its operation panel is shown in FIG. The operation panel is not only provided with numerical keys 50 and command keys 51 for writing the grinding method and control parameters, but also allows writing of control parameters necessary for the written grinding method on the numerical control device side. Indicator lamp L10 consisting of a light emitting diode to request from
0 to L410 are provided. In addition, the operation panel is provided with six display windows, and behind these display windows are numerical displays 52 to 5 with an appropriate number of digits.
7 are arranged. This not only displays the current positions of the grindstone head and table, but also displays the grinding method, control parameters, and the like. In addition, SW
Reference numeral 10 indicates a switch for specifying the type of workpiece, and when programming three types of workpieces, the switch SW10 is sequentially switched to write data. The numeric keys 50 are connected to a numeric key encoder 70 as shown in FIG. 7, and when a numeric key from 0 to 9 is pressed, code data CD and trigger signal KTS are generated according to the pressed numeric key. is output from the numerical key encoder 70. Code data CD output from numerical key encoder 70
are input to the input terminals of six display units DP10 to DP15 forming a numerical display 52 for displaying write data, and a trigger signal KTS is applied to a shift control circuit 71. 6 display units DP10
~DP15 both have a data latch circuit,
It integrates a decoding circuit, a drive circuit, and a display, and has an output terminal for outputting latched data. In the six display units DP10 to DP15 that display write data, the data output from the lower digit output terminal is serially connected to the upper digit input terminal, and the data output from the output terminal is EO30. Gate buffer GB1 with address and input/output address of address EO32,
It is connected to data input buses DIφ to DI15 via GB2. Furthermore, when the shift control circuit 71 is given the trigger signal KTS, it sequentially outputs pulses one by one from the output terminal 1 to the output terminal 6 in synchronization with the pulses output from the oscillator OSC. , display unit DP10~DP1
5 latch terminal.
Therefore, when the numerical key 50 is pressed, the pressed numerical value is displayed on the display unit DP15 of the lowest digit, and the numerical value of the lowest digit is shifted to the next higher digit, and the numerical key 50 is Each time the key is pressed, the entered numerical value is sequentially shifted to higher digits, and the data entered using the numerical key is displayed. In addition, the input address EO30 from the central processing unit 30,
When address data specifying EO32 is output and data input signal DIN is sent, gate buffers GB1 and GB2 are opened and display units DP10 to DP10 are output.
The data displayed in 15 is displayed on the central processing unit 30.
Read by. Note that 72 indicates a decoder that decodes address data output from the central processing unit 30, and 73 connects the input/output data buses DIφ to DI15, DOφ to DO15 and the data paths Dφ to D15 of the central processing unit 30. Shows a bidirectional buffer. On the other hand, the command key 51 is controlled by the command key encoder 74.
A code corresponding to the pressed command key is output from the command key encoder 74,
Input data buses DIφ to DI15 are connected via gate buffer GB3 having an input/output address of address EO20.
is output to. Further, when the command key 51 is pressed, a trigger signal is sent from the command key encoder 74.
CTS is output and given to the central processing unit 30 as an interrupt signal INT8. central processing unit 30
When an interrupt is applied by this interrupt signal INT8, the data control parameter representing the grinding method set by the numerical key 50 is stored in a predetermined stack table. Also,
The signal sent from the changeover switch SW10 is also applied to the central processing unit 30 via the gate buffer GB3. Furthermore, a numerical display 53 that displays current data
display units DP20 to DP25, numerical displays 54 and 55 that display the grinding order and grinding method;
Display units DP30 to DP33 forming
6,57 display units DP40 to 46, DP
The input/output addresses EO22 to EO2E are assigned to 50 to 55, and when these addresses are specified by the central processing unit 30 and the write signal WE is output, the output data is displayed on the specified display unit. Data on buses DOφ to DO15 is taken in and displayed. In addition, the display lamps L100 to L410 that request writing of control parameters and the display lamps L10 to L22 that display the operating status, etc.
Input/output address EO20 and EO30~EO3C
The central processing unit 30 controls the blinking of the light. FIG. 6 shows an example of an operation panel connected to the operation panel circuit 33, which is provided with an operation mode changeover switch, a manual pulse generator MPG, a start switch, and the like.
The switches attached to this operation panel are monitored by a basic routine (not shown) that is periodically executed by the interrupt signal INT3 generated every 10 mS from the RTC generation circuit 34. When the operation mode switch is switched to the MDI position, an interrupt signal INT from the data writing device 31 is output.
8 and executes the routine MDI for data writing, and when the operation mode is switched to automatic, the automatic operation program AUTO is executed. Also, when the manual pulse generator MPG is rotated, the interrupt signal INT6 or
INT7 is given to the central processing unit 30 for manual feeding. The pulse generation circuit 24 in FIG. 1 outputs the number of pulses designated by the central processing unit 30 to the pulse motor drive circuits 25 and 26 during automatic feed or manual feed operation. The circuit configuration is as shown. From the central processing unit 30, data representing the axis of movement and whether the direction of movement is positive or negative, data representing the oscillation period and frequency division ratio, and data representing the amount of movement are sent to a data buffer DB.
These data are latched into buffer registers BR20 to BR22 having input/output addresses E000, E006, and E004, respectively. Furthermore, when address E002 is specified, a signal is applied to the load terminal LOAD of the preset counter 80. The data representing the cycle of the data latched in the buffer register BR21 is sent to the DA converter 81.
is converted into an analog signal by VF converter 8.
given to 2. As a result, the VF converter 82 outputs pulses at the specified period, and these pulses are supplied to the frequency dividing circuit 83. The frequency dividing circuit 83 divides the pulse into 1/10 or 1/100 according to the data representing the frequency division ratio of the data latched in the buffer register BR21, or directly outputs the pulse. The pulses output from the frequency dividing circuit 83 are applied to a gate circuit 84 and a subtraction terminal DOMW of the preset counter 80. The gate circuit 84 switches the gate based on data representing the moving axis and moving direction latched in the buffer register BR20, and supplies pulses to either the forward rotation terminal or the reverse rotation terminal of the pulse motor drive circuit 25 or 26. do. On the other hand, the preset counter 80 has the movement amount set in the buffer register BR22 as its initial value, and this initial value is subtracted by the distribution pulse, and when the counted value becomes zero, this is detected as zero. The zero detection circuit 8
A distribution completion signal CON DEN is output from 5. This signal CON DEN is given to the central processing unit 30 as an interrupt signal INT2 to request data for the next pulse distribution, and also to the preset counter 80.
is applied as a load signal to the buffer register BR2 by the central processing unit 30 during pulse distribution.
Preset counter 8
It is set to load to 0. Next, operations at the time of writing control data and during automatic operation, and the operation of the central processing unit 30 will be explained based on a flowchart. If you want to write control data now, after switching the operation mode switch on the operation panel to the MDI position, move switch SW10 on the operation panel of data writing device 31 to the workpiece to which data is to be written. After that, control data is written in the following order using the numerical keys 50 and command keys 51 according to the numbers. 1 Writing the grinding order The grinding order is input to identify which machined surface among the many machined surfaces provided on one workpiece, data is being written. If it is a machined surface, press the command key for grinding order, then press the numeric key 1, and then press the command key for writing. Also, when entering data for the second and subsequent machining surfaces, the lamp L100 provided before the grinding order will light up, so press the numerical key corresponding to the number of the machining surface and enter the data. Press the command key. When the command key for the grinding order is pressed, the command key decoder 74 of the data writing device 31 outputs a trigger signal CTS, and the central processing unit 30 is given an interrupt signal INT8. As a result, the central processing unit 30 reads and executes the MDI routine program shown in FIG. The first step 110 of the MDI routine is to determine whether the pressed command key is a grinding order key using the command key encoder 7.
4, and if it is determined that the pressed key is for the grinding order,
Proceeding to step 111, the MDI flag is set and the count value of the MDI counter is set to -2.
Note that the MDI counter controls the writing step of control data, and the count value of the MDI counter is -
When the count is 2, it indicates that the step is to input data on the grinding order, and when the count value is -1, it indicates that the step is to input the data on the number of processing stages. Also, when the count value of the MDI counter becomes positive,
It is used to specify the order of columns in the MDI table shown in FIG. 12 and to request writing of control parameters according to the set grinding method. After this, at step 112, data in which bit 0 is "1" and other bits are "0" is transferred to buffer register BR12 at address EO36, and lamp L1 is transferred to buffer register BR12 at address EO36.
00 is lit and returns to the main routine. Next, when a numerical key is pressed, it is displayed on the display unit DP15 for displaying written data, and the operator is informed of the input grinding sequence number. When the write command key is subsequently pressed, the central processing unit 30 is interrupted again and the MDI routine is executed again. Since the MDI flag is set at this time, this is determined in step 113 and the process advances to step 114. Step 114 is a step for determining whether the pressed command key is a write command key. If it is determined that a write command key has been pressed, the program jumps to the write processing routine WRITE shown in FIG. It will be done. In the first four steps of the write processing routine WRITE, steps 130 to 133, it is determined what data is written based on the contents of the MDI counter, and the process is executed in step 134 according to the contents of the MDI counter. ,149,151,156,
160. In this case
Since the MDI counter is -2, step 1
The routine moves on to the routine after 34. Step 134
When the process moves to Step 13, the data displayed by display unit DP15 is read internally.
5, the workpiece number set by switch SW10 is read. Then, in step 136, with the workpiece number and grinding order data,
A stack table storing the grinding method and control parameters is selected from the parameter storage area, and in step 137, the grinding order is displayed on the display units DP30, 31 for displaying the grinding order. For example, if the workpiece number is 1, the grinding order is 1, so in step 136 the first stack table among the 30 stack tables is selected. At step 138, it is determined whether the grinding order is between 1 and 10. If it is between 1 and 10, the process moves to step 139; otherwise, the process moves to step 145. In this case, since the grinding order is I, the process moves to step 139 and the write pointer is set at address 2 of the selected stack table. Further, in step 140, it is determined whether the grinding order is 1, and if the grinding order is 1, the count value of the MDI counter is set to -1 in step 141, and in step 142, the previously programmed workpiece is Display unit DP20~ for displaying current data, with the number of machining surfaces as the number of machining stages.
Display on DP25 and turn on lamp L10 in step 143.
1 is lit and returns to the main routine. In addition,
The number of processing stages is determined by counting the number of stack tables in which "1" is written in address 1 of the stack table. 2 Writing the number of machining stages Since the lamp L101 is turned on in step 143, the operator inputs the data of the number of machining stages.
For example, if the number of machining stages is three, input 3 using the numerical keys, and then press the write command key. In this case, the write key is also pressed, so
The write processing routine program shown in FIG. 10 is executed. Then, based on the count value of the MDI counter, it is determined that the data input using the numeric key is the data of the number of stages, and the process moves to step 149. At step 149, the set number of stages is displayed on the current data display units DP20 to DP25, and 1 is written in the 1st address of the stack table corresponding to the set number of stages, and the 2nd address and subsequent addresses of these stacks are written. Clear and prepare for writing the grinding method and control parameters. After setting the MDI counter to 0 in step 150, the process returns to the main routine. 3 Writing of Grinding Method In this embodiment, writing of the grinding method and control parameters is performed in order according to instructions from the central processing unit 30. When the operator presses the command key for the next step, the lamp L1 on the operation panel will light up.
One of the lamps 00 to L140 is lit, and the operator writes the data specified by the lit lamp. In order to perform such control, the central processing unit 3
In the memory area of PROM 0, there is a lamp address table showing which pit position of which input/output address the lamp corresponding to the type of control parameter is connected to, as shown in FIG.
As shown in FIG. 2, an MDI table is provided in which the control parameters necessary for each grinding method are stored using the table number of the lamp address table. The lamp address table also stores data indicating a data store position in order to determine where in the stack table data entered using the numerical keys should be stored. Note that when writing the grinding method, the first
Only the lamp address table shown in Figure 1 is used. When the command key for the next step is pressed, the central processing unit 30 determines this at step 117 in FIG. 7 and proceeds to step 118. In step 118
Determine whether or not the MDI counter is zero. If it is not zero, proceed directly to step 121. If it is zero, read the grinding method data written in the stack table in steps 119 and 120, and After outputting to the display units D32 and DP33, the process advances to step 121. In this case, zero is displayed because the stack table has been cleared. After this, in step 121, increment the MDI counter.
1, and in step 122 it is determined whether the count value is 1. If the count value is 1, step 12
If it is not 1, proceed to step 123.
In this case, since the count value of the MDI counter is 1, the process advances to step 129. In step 129, the table No. 0 of the lamp address table shown in FIG. 11 is searched, and the process proceeds to step 126. At step 126, the lamp address and bit position data stored in table 0 are read out.
The input/output address bit position data read out in step 127 is output to light the lamp L102. This instructs the operator to input data on the grinding method. The operator follows this and inputs the data of the grinding method using the numeric keys, and then presses the write command key. In the case of this embodiment, eight types of grinding methods as shown in Table 1 can be specified, and the optimum grinding method for the machined surface is set. For example, processing surface 1
If plunge constant feed grinding is optimal for grinding, press the number key 1 and then press the write key.

【table】

[Table] When the write command key is pressed, this is determined in step 114, and the process jumps to the write routine WRITE shown in FIG. 10, and the count value of the MDI counter is 1. It is determined that the data is for the grinding method, and the process advances to step 151. At step 151, the grinding method data entered using the numerical keys is read from the display units DP10 to DP15, and step 152
Determine whether the grinding method read in is either 11 or 12. In this case, since the grinding method is 1, the process moves to step 154 and the read grinding method is displayed on the display unit for displaying the grinding method.
Then, in step 155, the read grinding method data is written to address 2 of the selected stack table, and the process returns to the main routine. 4 Writing of control parameters Writing of control parameters is also performed by pressing the command key for the next step in the same way as writing for the grinding method. When the next step command key is pressed,
As in the previous case, this is determined in step 117, and since the count value of the MDI counter is 1, the process moves from step 118 to step 121, where the MDI counter is incremented to make the count value 2. Thereafter, the process proceeds to step 122, where it is determined whether the count value of the MDI counter is 1. In this case, since the count value is 2, the process proceeds to step 123. At step 123, the grinding method and grinding method set by referring to the lamp address table shown in FIG.
A table number is selected from the count value of the MDI counter. Then, it is determined whether the table is at the end depending on whether the data read in step 124 is -1, and if the data is -1, the process jumps to step 111.
After setting the MDI counter to -2 in step 1, the lamp L100 is turned on in step 112. on the other hand,
If the data is not -1, the process moves to step 126, and the lamp address and bit position data of the table of the read number are read out. In this case, since the grinding method is 1 and the count value of the MDI counter is 2, 1 is read out as the table number data from the MDI table in FIG. Lamp address data EO36 and bit position data 3 stored in the first lamp address table in the figure are read out. Thereafter, at step 127, data in which only the third bit is "1" is transferred to address EO36, thereby lighting the lamp LI03. Also, step 128
Then, data stored in 3 bytes is read from address 3 of the stack table and displayed on display units DP20 to DP25 for displaying data. In this case, zero is displayed because the stack table has been cleared. The operator can determine by the lighting of the lamp L103 that the next control parameter that must be input is the data on the position of the grindstone platen, and therefore inputs the data of the position of the grindstone platen using the numeric keys.
After this, press the write command key. In this embodiment, the data for the original position of the grinding wheel head is set to a value that is twice the distance between the processing surface of the grinding wheel 21 and the workpiece axis at the rapid feed start point.
The operator can set the data of the grindstone base position in correspondence with the diameter dimension of the workpiece. It is determined in step 114 that the write command key is pressed, and the program jumps to the write routine of FIG. In normal writing of control parameters, everything moves from step 133 or step 161 to step 156. At step 156, the data input using the numerical keys is stored in a predetermined storage area of the stack table with reference to the data store position of the lamp address table shown in FIG. In the subsequent step 157, the data written in the stack table is read out again and outputted to the display units DP20 to DP25 for displaying the current data. Since the data entered by the operator using the numeric keys is displayed on the display units DP10 to DP15 for displaying the written data, the worker can display the display units DP10 to DP15 for displaying the written data and the current data display. Due to the discrepancy between the display units DP20 to DP25 for
Alternatively, it can also be determined that an abnormality has occurred in the core memory or the like that constitutes the stack table. In this manner, when writing of the data for the grindstone base position is completed, the next step command key is pressed again. As a result, the MDI counter is incremented in step 121, and the lamp for the next control parameter to be input is lit in steps 123, 126, and 127. In this case, the table number for No. 3 of grinding method 1 shown in the MDI table in Figure 12 is 2, so refer to the lamp address table in Figure 11 and connect to the 4th bit of address EO36. The lamp L104 is turned on to notify that the next control parameter to be input is table index position data. Thereby, the operator inputs the data of the table index position using the numerical keys and the write command key. In this embodiment, the table index position is input as an absolute coordinate value with the table original position as the origin, so that the table current position data can be directly programmed as table index position data. The indexing operation is also performed based on the input absolute coordinate values. The control parameters are written in the same way in the following order. However, if the grinding order is 1 and the grinding method is 1, when the writing of the step of whether or not to correct the grinding wheel after grinding is completed, the next step is to write the control parameters. L200
~ L207 is lit in order to request writing of control parameters for grinding wheel correction, and following this,
The lamps L300 to L308 are turned on in order to request writing of control parameters necessary for plunge grinding. In the case of fixed-size grinding, spark-out is not performed, so the lamp L309 is not lit and writing of the spark-out time is not required. In addition, the feed amount for air grinding, rough grinding, and fine grinding in the case of fixed size grinding is not used for feed control, but it is used to calculate the rapid feed amount to the air grinding start point and to detect overstroke. used for. When the writing of the control parameters necessary for the set grinding method is completed in this way, -1 is read out as the table number in step 123, so the process moves from step 124 to step 111 and the MDI counter is set to -2. Set, step 11
At step 2, the lamp L100 is turned on and the process returns to the main routine. As a result, the lamp lights up at L308.
The process then moves to L100 indicating the grinding order, and the operator is informed that writing of the control parameters for the first processing surface is completed and that the grinding order data must be input next. 5 Writing data from the second stage onward. The same procedure as above is also used when storing the grinding method and control parameters for the machined surfaces in the second and subsequent stages. When writing data from the second stage onward, write 2 as grinding order data corresponding to the position of the machined surface.
After inputting the data up to 10 using the numerical keys, press the write command key. This causes the central processing unit 30 to proceed to step 13.
After switching the stack table in step 6, the process branches from step 140 to step 143 to perform MDI.
Set the count value of the counter to zero and proceed to step 1 in Figure 9.
Jump to 21. As a result, the count value of the MDI counter is set to 1, and steps 129, 1
26 and 127, the lamp L102 requesting writing of the grinding method is turned on. Thereafter, when the operator inputs the grinding method using the numerical keys and presses the write key, the new grinding method is displayed on the display units DP32 and DP33. Subsequently, when the command key for the next step is pressed, the first parameter among the control parameters necessary for the new grinding method is searched from the tables shown in FIGS. 11 and 12 in step 123, and thereby, Turn on the lamp.
The operator inputs the control parameters using the numerical keys and presses the write key. The written data is stored in a predetermined storage area of the stack table, and when the command key for the next step is pressed, the lighting position of the lamp changes to instruct the next control parameter to be input. It will be done. Since control parameters related to grindstone correction may be common to each processing surface, the table shown in FIG. 12 is created so that writing of control parameters related to grindstone correction is not required in the second and subsequent stages. That is, table numbers 6 to 13 in the lamp address table in FIG. 11 are control parameters for grinding wheel correction, and table number 6
~13 is the grinding order O1 in the MDI table in Figure 12
Only the grinding methods for the grinding orders 02 to 10 are given, but the grinding methods for the grinding orders 02 to 10 are not given. For example, if the second-stage grinding method is double-sided deep-stop grinding, when the contents of the MDI counter increments from 6 to 7 in the table of FIG. 12, the table number changes from 5 to 24. Therefore, when the writing of the traverse stroke is completed and the next step key is pressed, the lamp L4
00 lights up to request writing of control parameters for traverse grinding. When the writing up to the tally time is completed, the grinding type lamp L100 is lit to notify the completion of writing. Next, the operation when grinding is automatically performed using the control parameters written in this manner will be described. In the numerical control device of this embodiment,
In order to process a workpiece fully automatically, in addition to grinding each machining surface using a different specified grinding method, the table is indexed to a specified indexing position as the machining surface changes. It is designed to control the movement and the movement of grinding wheel correction, and by combining these movements, the workpiece can be machined fully automatically. In addition, each of these operations is controlled by a combination of several basic operations (hereinafter referred to as basic operations) such as hydraulic advance of the wheel head, cutting of the wheel head, table movement to the right, sizing signal check, etc. The PROM storage area contains many subroutines to perform these basic operations, and the subroutines necessary to perform each operation by combining these subroutines. A sequence table stored in accordance with the order of operations is stored. 13a to 16a show typical operations used in automatic operation. FIG. 13a is table indexing operation for starting automatic operation, FIG. 14a is grinding operation of grinding method 1, and FIG. 15a shows the indexing operation of the table, and FIG. 16a shows the grinding operation of grinding method 4. Further, sequence tables for performing these operations are shown in FIGS. 13b to 16b. Each sequence table contains
In addition to the subroutine number for executing basic operations, the number of the next step is written. In addition, when determining whether the sizing signal is on or off or determining the number of traverses in a subroutine that performs a reference operation, the jump destination step number when the condition is met and the jump destination step number when the condition is not met are used. and the next step number field, respectively.
It is written in the jump destination step number column. In addition to the data shown in the figure, parameters used in the subroutines are added to these sequence tables. For example, if the subroutine is a feed routine, the address data of the area where the feed amount and feed rate are stored is added, and if the subroutine is a routine that turns on and off a solenoid, the input/output address and pit position of the solenoid to be turned on and off are added. data is added as a parameter. When the driving mode is switched to automatic, the central processing unit 30 executes the automatic driving routine shown in FIG.
The AUTO program is executed every 10 mS in synchronization with the interrupt signal INT3 sent from the RTC generation circuit 34, and the workpiece is automatically machined by combining multiple operations consisting of the combination of basic operations as described above. . First step 2 of automatic driving routine AUTO
In step 08, it is tested whether the automatic driving flag AUTF is 1, and it is determined whether automatic driving has started. If it is not 1, go to step 209 and test whether the start switch is pressed. If the start switch is pressed, go to step 21.
Set the automatic operation flag AUTF to 1 at 0,
At step 211, the AUT counter is set to -1 and the process returns to the main routine. Step 212
is a step to test whether the pulse distribution completion flag DEN is set and in the state of 1. If it is not 1, the program returns to the main routine without performing any processing, and if it is 1, it moves to step 213. Test whether the AUT counter is -1, and if it is -1, proceed to step 214 in Figure 13b.
Search for the sequence table for automatic operation start table indexing operation shown in step 215.
Set AUT counter to +1. Then, in step 216, the sequence counter SEQ counter for reading the subroutine number is reset to zero, and then in step 217, the subroutine number written in the location specified by the SEQ counter in the sequence table is read. At the start of automatic operation, the 13th
Subroutine number 4 stored first in the table shown in FIG. b is read out. Step 218 determines the end of the sequence table depending on whether the read subroutine number data is -1. If it is -1, the operation currently being performed is assumed to have been completed. The sequence table for the next operation to be performed is searched in the subroutine STBS shown in FIG. 18, and the process returns to step 216. On the other hand, if the read subroutine number is not -1, the process moves to step 219 and the program of the subroutine specified by the read subroutine number is executed. Then, in step 220, the content of the SEQ counter is changed to the next step number or jump destination step number stored in FIG.
Return to 7. Therefore, at the start of automatic operation, Step 2
19, subroutines 4, 24, 36, and 3 registered in the sequence table shown in FIG.
Execute programs 9 and 30 to initialize the Y-axis indexing table, index the table, etc. Thereafter, the program jumps to a subroutine STBS that searches the sequence table for the next operation. Steps 221 to 225 of subroutine STBS
is a step in which the next action to be performed is determined based on the count value of the AUT counter incremented by 1 in step 220. In this embodiment, when the count value of the AUT counter is 1 to 5, the next action is determined. Table indexing operation, grinding operation, dressing operation during machining,
It is determined that this is a dress operation after machining is completed, or a machining completion operation. When the next operation to be performed is a table indexing operation, it is determined in step 226 whether or not to perform dressing (grindstone correction) after the grinding of one machined surface is completed, and if dressing is to be performed, step 227 is performed. The sequence table for determining the address position is searched, and the count value of the AUT counter is set to 2 in step 228, and the process returns to the main routine. On the other hand, if dressing is not performed after grinding, step 229
In step 230, a sequence table for indexing the table to the next grinding position is searched, and in step 230 it is determined whether grinding of all machined surfaces has been completed. If the grinding of all machined surfaces has been completed, the process moves to steps 231 and 232, and it is determined whether or not dressing is to be performed after grinding, or whether the number of pieces to be ground after dressing matches the set value. However, if either condition is not satisfied, the count value of the AUT counter is set to 4 in step 233 and the process returns to the main routine. If either condition is satisfied, the table is moved to the dress position in step 235. A sequence table for indexing is searched, the AUT counter is set to 3 in step 235, and the process returns. Furthermore, if the next operation to be performed is a grinding operation, a sequence table for machining the machined surface using the specified grinding method is searched in step 236, and the AUT counter is reset to zero in step 237.
If the next operation to be performed is the dressing being processed, a sequence table for performing the dressing is searched in step 238, the AUT counter is reset to zero in step 239, and the process returns to the main routine. Similarly, if the next operation to be performed is final dressing, the sequence table for dressing is searched in step 240 and the process returns to the main routine.If machining is completed, the grinding head and table are returned to their original positions in step 241. A sequence table to be restored is searched, and the count value of the AUT counter is set to 5 in step 242, and the process returns to the main routine. In this way, the contents of the searched sequence table are sequentially executed in the automatic operation routine shown in FIG. 17, and the workpiece is machined. Once the workpiece has been processed,
The count value of the AUT counter becomes 6, which is determined in step 225, and the process moves to step 243, where the automatic operation flag AUTF is set to 0 and the automatic operation is completed. Next, among the many subroutines that perform basic operations, those related to pulse distribution will be described. Subroutine 21 is a routine that initializes a data table when performing brunge grinding. As shown in FIG. 19, in steps 250 to 254, each feed is Control parameters such as feed amount, feed speed, feed stop time, spark-out time, etc. are read out and rearranged and stored in the RAM storage area. Note that step 251
In this case, the amount of rapid traverse to move the grinding wheel to the dry grinding start position is calculated from the data of the feed amount and grinding diameter (finished dimension) for each feed stored in the stack table, and is stored in the RAM area. . Subroutine 36 and Subroutine 3
8 is a routine for moving the grindstone head 22 or the table 11, and this subroutine is used for air grinding, coarse grinding,
It is used not only for making cuts with the grinding wheel during fine grinding and fine grinding, but also for traversing the table 11. When the subroutine 36 is called, it is indicated in step 260 that the feed is fixed feed, as shown in FIG.
If the PTP flag is set and the subroutine 38 is called, the TSN flag indicating that the feed is a fixed size is set in step 261, and then the process moves to step 262. Step 2
When it reaches 62, the parameter for specifying the movement direction added to the sequence table is read out.
Set it in the MVFLG register and in step 263
The speed data stored in the RAM is read out with reference to the address data added to the sequence table and set in the FEEVL register. Then, in step 264, the amount of movement is read from the RAM area and set in the PLTOTL register, after which the program jumps to the pulse distribution routine PGEN shown in FIG. This pulse distribution routine PGEN not only continues execution from subroutines 36 and 38, but also handles interrupt signals sent from the pulse generation circuit 24.
It is also executed by an interrupt request by INT2. Jumping to the pulse distribution routine PGEN:
After setting the DEN flag to zero in step 270, the command movement amount register is set in step 271.
It is determined whether PLTOL is zero, and if it is zero, the DEN flag is set to 1 in step 272 and the process returns to the main routine; if it is not zero, the routine proceeds to step 273 and subsequent steps. In step 273, the speed data set in the FEEVL register in the subroutine is output to address E006, and the pulse generation circuit 2 is output.
4 in the pulse register BR21, and in step 274, it is determined whether fixed-length feed or fixed-quantity feed is being performed depending on whether the TSN flag is set. If it is fixed-length feed, in step 275, 1 is output as the data of the number of feed pulses to address E004, and the process moves to step 277; if it is not fixed-length feed, step 276 is executed.
The amount of feed per time according to the feed speed is calculated and outputted to address E004, and the process moves to step 277. As a result, data of 1 or a predetermined feed amount is set in the puff register BR22. In step 277, meaningless information is output to address E002 and a load signal is given to the preset counter 80, and in step 278, the movement direction data set in the MVFLG register is output.
Output to address E000 and set in buffer register BR2. As a result, a pulse is output from the gate circuit 84, and the grindstone head 22 or table 11 starts moving in a predetermined direction. After that, in step 279, the current position of the grinding wheel head 22 or table 11 is corrected by subtracting or adding the amount of movement to the current position counter that stores the current positions of the grinding wheel head 22 and table 11, and then
At 80, the movement amount is subtracted from the command movement amount register PLTOTL. After this, in step 281, it is determined again whether or not it is fixed-length feed, and if it is not fixed-length feed, the process returns to the main routine, and if it is fixed-length feed, the DEN flag is set to 1 in step 282. Return to main routine. In step 212 of the automatic operation routine AUT, the state of the DEN flag is tested, and if the DEN flag is 1, a program for automatic operation is executed. Therefore, in the case of fixed-size feeding, the automatic operation routine AUT is executed every time one pulse is distributed to a predetermined axis, and the fixed-size signal from the sizing device is executed within the subroutine specified in the sequence table. state is tested. Then, when the sizing signal is sent out, the pulse distribution that has been performed so far is stopped, the next subroutine is called, and other sequence operations and pulse distribution with different feed speeds are started. Further, in the case of fixed-quantity feeding, an interrupt is provided from the pulse generation circuit 24 every time the pulse distribution of the number of pulses outputted in step 276 is completed, and the pulse distribution routine PGEN is executed many times. Then, when the grindstone head 22 or the table 11 is moved by the commanded amount and the commanded movement amount register PLTOTL becomes zero, the automatic operation routine AUT is executed and the next operation is started. In the above embodiment, the data on the grinding method and the control parameters are stored in the same storage area, but a separate area may be provided to store the grinding method for each machined surface. Furthermore, in the above embodiment, lamps made of light emitting diodes are used as means for requesting writing of control parameters, and the lamps corresponding to the parameters that need to be written are turned on in sequence in synchronization with the writing of the control parameters. However, a CRT display device may be used as the display device to display the parameter name that must be written next. Furthermore, a switch for setting a grinding method may be provided for each machined surface, and during grinding, processing may be performed using the grinding method set in these switches. As described above, in the numerical control device of the present invention, when the operator specifies one of the machining patterns according to the shape of the machining location, the display device displays the types of parameters required to execute the specified machining pattern. When the worker is instructed to write the parameters by displaying them in order at the top, and the worker responds by inputting the parameter value, the input value will be displayed immediately before inputting the parameter value. Since the configuration is such that it is stored in the memory as being related to parameters, the operator first specifies the type of machining pattern and then uses the numeric keys to write the value of the parameter that is instructed to be written on the display. You can complete writing of the parameters necessary for the specified machining pattern by simply inputting them in sequence. This not only makes it easy and quick to write the parameters necessary to execute a specified machining pattern, but also eliminates the need to provide a key switch on the operation panel to inform the numerical control device of the type of parameter to be written. It also has advantages such as being able to be made smaller. Furthermore, in the present invention, for control parameters that take the same value at each of a plurality of machining locations, such as grinding wheel correction data in grinding, data input is commonly performed for multiple machining locations, and the operation In some cases, such control parameters are commonly used for control at each machining location, so if the control parameters common to each machining location are input in common to multiple machining locations, This method has the advantage that the time required to input control parameters can be significantly reduced compared to a method in which control parameters are input for each processing location.

[Brief explanation of the drawing]

The drawings show an embodiment in which the present invention is applied to a numerical control device for a grinding machine, and FIG. 1 is a plan view of the grinding machine and a block diagram of the numerical control device, and FIG.
The figure shows the address map of the central processing unit 30 in Fig. 1, Fig. 3 shows the arrangement of the stack table, and Fig. 4 shows the state in which grinding method data and control parameters are stored in the stack table. 5 is a front view of the operation panel of the data writing device 31, FIG. 6 is a front view of the operation panel, FIG. 7 is an electric circuit diagram of the data writing device 31, and FIG. 8 is a pulse Electrical circuit diagrams of the generation circuit 24, FIGS. 9 and 10
The figure is a flowchart showing a routine for writing the grinding method and control parameters, Figure 11 is a diagram showing a table storing control parameters and corresponding lamp addresses, and Figure 12 is a diagram showing the control required for each grinding method. Figures 13a, b to 16a, b are diagrams showing tables storing parameter types, and Figures 17 and 1 are diagrams showing various operations used during automatic operation and their sequence tables.
FIG. 8 is a flowchart showing a routine for automatic operation, FIGS. 19 and 20 are diagrams showing an example of a subroutine for performing basic operations, and FIG. 21 is a flowchart showing a pulse distribution routine. 10...bed, 11...table, 12,23...
Pulse motor, 14... Main shaft, 15... Headstock, 17
... Tailstock, 21... Grinding wheel, 22... Grinding wheel head, 24
...Pulse generation circuit, 25, 26...Pulse motor drive circuit, 30...Central processing unit, 31...Data writing device, 32...High power interface, 33...Operation panel circuit, 34...RTC generation circuit, 50...Numeric key , 51... Command key, 70... Numerical key encoder, 71... Shift control circuit, 74... Command key encoder, 80... Preset counter, 81... DA
Converter, 82... VF converter, 83... Frequency dividing circuit, 8
4...Gate circuit, 85...Zero detection circuit, BR10~
BR22...Buffer register, DP10~DP55
...Display unit, GB1-GB3...Gate buffer, L10-L410...Display lamp, M...Memory, W...Workpiece.

Claims (1)

[Claims] 1 In a numerical control device for machine tools that controls specific machine movements by directly inputting data with a key switch attached to the operation panel, numerically controlled machining is performed for each machining pattern for each of multiple types of machining patterns. A storage means is provided for storing the types of parameters required when performing the above processing and the types of parameters common to each processing location, and the operation panel is configured to selectively instruct one of the plurality of processing patterns. and a key switch for inputting the value of the parameter.
A display device is provided that sequentially displays the types of parameters to be input, and when one machining pattern is designated by the key switch when inputting parameters for each machining location, the parameters required for the designated machining pattern are displayed. The types are sequentially displayed on the display device with reference to the storage means, and at least one
parameter type display means for sequentially displaying a common parameter type for each machining location on the display means with reference to the storage means; and parameters that are sequentially input in response to the display of the parameter type display means. write control means for sequentially storing the value of the parameter in memory as the value of the parameter whose type was displayed on the display device immediately before the parameter value was input; A numerical control device for a machine tool, characterized in that it is provided with a control means for controlling the operation of a machine to machine a plurality of machining locations based on parameters and parameters input for each machining location.