JP3751321B2 - Control device for printed circuit board drilling machine - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a control device for a printed circuit board drilling machine.
[0002]
[Prior art]
In a printed circuit board drilling machine, a tool storage device in which a plurality of (several hundreds) tools are arranged is arranged at one end of a table on which a printed circuit board is placed, and these tools are arranged according to instructions from a machining program or tool life. Processing is performed while exchanging based on the exchange command.
[0003]
Depending on the type of printed circuit board to be processed, the number of holes processed in the printed circuit board may be several to ten or more. Further, the number of holes to be processed is from several hundred holes to several 10000 holes. On the other hand, the number of holes that can be processed with one tool is about 3000 holes on average. Therefore, a plurality of tools having the same diameter are stored in the tool storage device, and when the tool in use reaches the end of its life, the used tool is replaced with another tool and drilling is continued.
[0004]
As described above, in order to store a plurality of tools having the same diameter and facilitate the management thereof, the tools stored in the tool storage device include one tool storage location number assigned to each tool storage location, When a plurality of tools having the same diameter are stored in one tool storage device, the same tool number is assigned. If there is a tool that has not reached the end of its service life among the tools with the same tool number, it is determined that the tool can be replaced and the machining is continued.
[0005]
However, if the dimensions (tool diameter, length, etc.) of the tool exchanged in response to the tool exchange command are different from the designated tool dimensions, the control device causes the CRT of the input device to make a tool abnormality. Is displayed and the printed circuit board drilling machine is stopped. Then, when the operator changes the tool and instructs to restart, the machining is resumed.
[0006]
[Problems to be solved by the invention]
For this reason, when a tool failure occurs, even if there is a usable tool, the printed circuit board drilling machine stops and remains stopped until the operator instructs to restart. Will drop. In particular, during an unattended operation at night, the restart is not instructed until the next morning, so the operating rate is greatly reduced.
[0007]
In view of the above circumstances, the object of the present invention is to replace the tool again when there is a usable tool among the tools having the same tool number even if the diameter and length of the replaced tool are abnormal. It is to provide a control device for a printed circuit board drilling machine that improves the operation rate of the printed circuit board drilling machine by continuing the processing.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, in the present invention, an input / output device for inputting machining condition data and a machining program, a storage device for storing each input data, an arithmetic device for comparing and calculating each data, A tool storage device storing a plurality of tools including tools having the same tool number; and a tool measuring device for measuring the diameter and length of the tool supported by the spindle. When processing with that tool is finished, when the processing with the tool is finished, the tool is returned to the stored position, and the tool is continuously processed while the tool stored in the tool storage device can be used. the control apparatus for a printed circuit board drilling apparatus to control the printed board drilling machine, in the storage device, and a data table for storing the service life in response to the tool storage location number, the presence or absence of an abnormality A data table for憶and provided to the arithmetic unit, so if and when the tool abnormality in the tool has occurred in the measurement after the tool change is life, is exchanged with another tool of the same tool number comprising the functions, dimensions of the tool measured at the tool measuring device is different from the dimensions of the tool specified by the machining program, as well as stores the abnormality of the tool in the data table for storing the presence or absence of the abnormality Then, the abnormal tool is replaced with another tool having the same tool number, and the processing of the printed circuit board is continued.
[0009]
[Action]
When the dimension of the tool measured by the tool measuring device is different from the dimension of the tool specified by the machining program, the abnormality of the tool is stored in the data table, and the abnormal tool is assigned the same tool number. Continue to process the printed circuit board by replacing with other tools.
[0010]
【Example】
An embodiment of the present invention will be described below with reference to FIGS. ◆
In FIG. 1, 1 is a printed circuit board. Reference numeral 2 denotes a table of a printed circuit board drilling machine, which is movably supported by a guide member (not shown). A nut 3 is fixed to the lower surface of the table 2. A feed screw 4 is rotatably arranged so as to be screwed with the nut 3 and is driven to rotate by a servo motor (not shown).
[0011]
As shown in FIG. 2, the table 2 is divided into a processing area 2 </ b> A for placing the printed circuit board 1 and a tool storage area 2 </ b> B. The tool storage area 2 </ b> B includes a plurality of tables stored in the tool storage device 5. The tool 6 is stored. According to the arrangement of the tools 6, the tool storage device 5 includes a tool storage location number (AA to KK) corresponding to each tool and a tool number (No. 1) corresponding to each group of tools 6 having the same diameter. To No. 8) are assigned.
[0012]
A tool measuring device 7 is placed on the table 2. As shown in FIG. 3, the tool measuring device 7 transmits a lamp 8, a lens 9 for making the light of the lamp 8 parallel light, a lens 10 for expanding the parallel light, and the lens 10. A light receiving element (for example, a charge coupled device) 11 that receives light, a scanning circuit 12 for detecting an output of the light receiving element 11, and an output detected by the scanning circuit 12 are compared with a preset threshold value. A binarizing circuit 13 for converting to a binarized signal, a shift register 14 for storing and updating the binarized signal corresponding to the arrangement of the light receiving elements 11, and a servo for raising and lowering the spindle of the printed board drilling machine The counter 16 that counts the number of output pulses of the rotary encoder 15 attached to the motor and the stored contents of the shift register 14 are all mixed from 1 to 0 (or 0 is The detection circuit 17 for detecting when the state changes from the twisting state to the state 1), the setting circuit 18 for setting the length of the tool 6 instructed by the machining program, the output of the counter 16 and the detection circuit 17 The length of the tool 6 is calculated based on the output, compared with the length set in the setting circuit 18, and the diameter of the tool 6 is calculated from the arithmetic circuit 19 that outputs the result and the stored contents of the shift register 14. The setting circuit 21 for setting the diameter of the tool 6 instructed by the machining program, the diameter of the tool 6 calculated by the calculation circuit 20 and the diameter set in the setting circuit 21, And a comparison circuit 22 for outputting the result.
[0013]
A slider 23 is supported by a guide member (not shown) so as to be movable. A nut 24 is fixed to the back surface of the slider 23. A feed screw 25 is rotatably arranged so as to be screwed with the nut 24 and is driven to rotate by a servo motor 26. A spindle head 27 is movably supported by the slider 23. A nut 28 is fixed to the back surface of the spindle head 27. A feed screw 29 is rotatably arranged so as to be screwed with the nut 28, and is driven to rotate by a servo motor 30. The rotary encoder 15 is attached to the servo motor 30. Reference numeral 31 denotes a spindle, which is rotatably supported by the spindle head 27. A collet chuck 32 is supported by the spindle 31 so that it can be opened and closed, and supports the tool 6 so as to be detachable. An air cylinder 33 is supported by the spindle head 27 via a bracket 34. A pressure foot 35 is supported by the cylinder 33.
[0014]
Reference numeral 40 denotes a control device, a paper tape reader 42 for reading a processing program recorded on the paper tape 41, a keyboard 43 for inputting data not recorded on the paper tape 41, and a CRT 44 for displaying input data and stored contents of a storage device to be described later. And an arithmetic unit 45 for comparing and calculating various data and a storage device 50 for storing various data.
[0015]
The storage device 50 stores a data table 51 for storing a tool number assigned for each stored tool diameter, and a tool storage location number corresponding to each tool stored in the tool storage device. A data table 52, a data table 53 for storing the number of usable tools up to the life of each tool, a data table 54 for storing the number of times each tool is used, and a tool storage of the tool when a tool abnormality occurs Corresponding to the location number, a data table 55 for storing the history of occurrence of an abnormality, a data table 56 for storing the diameter of the stored tool, and a data table 57 for storing the machining conditions corresponding to the tool number are provided. ing.
[0016]
With this configuration, during drilling of the printed circuit board 1, when drilling with the tool 6 being used is completed, when the tool 6 being used has reached the end of its life, or when the tool 6 being used is broken. When this occurs, the replacement of the tool 6 is instructed. At this time, the tool number of the tool 6 to be used next is designated. Then, the arithmetic unit 45 collates the tool numbers stored in the data table 51 and selects the tool storage location number of the data table 52 that matches them. Then, from the tool storage location number selected in the data table 52, the data in the data table 53 is compared with the data table 54 data to check the tool storage location number that has not reached the tool life. For example, the tool storage location number Select AC tool 6. Further, the presence / absence of an abnormality history is confirmed by the data table 55 corresponding to the selected tool storage location number AC. At this time, since “1” indicating that the tool 6 at the tool storage location number AC is abnormal is stored in the data table 55, the tool 6 at the next tool storage location number AD is designated and Check for abnormal history.
[0017]
When the tool 6 to be replaced is designated in this way, the length and diameter are set in the setting circuits 18 and 22 of the tool measuring device 7. At the same time, the table 2 and the slider 23 are relatively moved, and the tool 6 supported by the spindle 31 is replaced. When the replacement of the tool 6 is completed, the table 2 and the slider 23 move relative to each other so that the tool 6 newly held on the spindle 31 is opposed to the tool measuring device 7. Then, the length and diameter of the tool 6 are measured.
[0018]
Here, since the distance L1 from the machine origin of the spindle head 27 of the printed circuit board drilling machine to the upper surface of the table 2 and the distance L2 from the upper surface of the table 2 to the light receiving element 11 of the tool measuring device 7 are known, the tool The length L of 6 is a spindle head when the output of the light receiving element 11 is changed by inserting the tip of the tool 6 between the light source 8 and the light receiving element 11 of the tool measuring device 7 and blocking the light of the light source 8. By detecting the movement amount L3 of 27 based on the output of the rotary encoder 15, ◆
L = L1-L2-L3 ◆
Can be obtained.
[0019]
The diameter Φ of the tool 6 is determined by reading the number N of light receiving elements 11 whose output has changed when the tool 6 inserted between the light source 8 and the light receiving element 11 is rotated from the shift register 14. From the arrangement pitch P of the constituent elements and the magnification F of the lens 10 ◆
Φ = N ・ P / F ◆
Can be obtained. In this way, the length and diameter of the tool 6 are measured, and the result is input to the arithmetic unit 44. And when there is no abnormality in the tool 6, the control apparatus 40 starts a process by controlling a printed circuit board drilling machine.
[0020]
When the length or diameter of the tool 6 is abnormal due to breakage of the tool 6, poor mounting on the spindle, wrong supply of the tool 6 to the tool storage device 5, etc., the arithmetic unit 45 corresponds to the tool storage location number of the tool 6. The tool abnormality history is stored in the data table 55, and the tool 6 having the same tool number is exchanged again, and the tool 6 is measured.
[0021]
In this way, even if an abnormality occurs in the tool 6, the machining can be continued while there is a tool 6 that can be used with the same tool number, so the stop time due to the abnormality of the tool in the printed circuit board drilling machine is shortened. The operating rate can be improved.
[0022]
Further, by calling the data table 55 and displaying the data table 55 on the CRT 44, it is possible to confirm the abnormal tool 6.
[0023]
【The invention's effect】
As described above, according to the present invention, an input / output device for inputting machining condition data, a machining program, etc., a storage device for storing each input data, and an arithmetic device for comparing and calculating each data are provided. In a control device for a printed circuit board drilling machine that controls a printed circuit board drilling machine that includes a tool storage device that stores a plurality of tools and a tool measuring device that measures the diameter and length of the tool supported by the spindle, A data table for storing presence / absence of abnormality corresponding to the tool storage location number is provided in the storage device, and the tool size measured by the tool measurement device is different from the tool size specified by the machining program. At the same time, the abnormality of the tool is stored in the data table, and the processing of the printed board is continued by replacing the abnormal tool with another tool having the same tool number. Since the eliminating downtime due to abnormality of the tool, it is possible to improve the operating rate of the printed circuit board drilling machine.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a printed circuit board drilling machine and its control device.
FIG. 2 is a plan view showing an arrangement state of tools.
FIG. 3 is a block diagram showing a tool measuring device.
FIG. 4 is an explanatory diagram showing storage contents of a data table in the storage device.
[Explanation of symbols]
5 Tool storage device 6 Tool 7 Tool measurement device 31 Spindle 40 Control device 42 Paper tape reader 43 Keyboard 44 CRT
45 arithmetic device 50 storage device 55 data table

Claims (1)

Input / output device for inputting machining condition data and machining program, storage device for storing each input data, arithmetic device for comparing and calculating each data, and storing multiple tools including tools with the same tool number A tool storage device, and a tool measuring device for measuring the diameter and length of the tool supported by the spindle,
When processing is performed with any of the tools stored in the tool storage device and the processing with the tool is finished, the tool is returned to the stored position and the tool stored in the tool storage device can be used. In the control device of the printed circuit board drilling machine that controls the printed circuit board drilling machine that is continuously processed,
In the storage device, and a data table for storing the service life in response to the tool location number, and a data table for storing the presence or absence of an abnormality, the provided,
When the abnormality occurs in the tool in the measurement after the tool change and the tool is at the end of its life, the arithmetic device is provided with a function that allows the tool to be replaced with another tool having the same tool number,
The dimensions of the tool which is measured by the tool measuring device is different from the dimensions of the tool specified by the machining program, as well as stores the abnormality of the tool in the data table for storing the presence or absence of the abnormality,
A control device for a printed circuit board drilling machine, wherein the abnormal tool is replaced with another tool having the same tool number to continue processing the printed circuit board.

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