JPH0780740A - Borer for printed board - Google Patents

Abstract

PURPOSE:To provide a borer for a printed board which can enhance workability, and thereby can enhance the operational factor of the borer for a printed substrate. CONSTITUTION:The spindle head 12 of a borer for a printed board is provided with a coating means 21 applying coats on the shank side end face of a tool 6, and with a detection means 30 detecting the shank side end face of the tool 6, and a binarization circuit 29 binarizing the output of the detection means 30 is provided, so that the output of the binarization circuit 29 is designed to be applied to an operating means 46 as a signal which resets the number of tool usage stored in the data table 54 of a memory means 50.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed circuit board drilling machine, and more particularly to a printed circuit board drilling machine which facilitates the exchange of tools.

[0002]

2. Description of the Related Art In a printed circuit board drilling machine, a plurality of (several hundreds of hundreds) are provided at one end of a table on which the printed circuit board is placed.
A tool storage device in which tools of (book) are arranged is arranged, and machining is performed while exchanging these tools based on an instruction of a machining program or a replacement instruction based on the tool life.

The number of holes machined in a printed circuit board may vary from several types to more than ten types depending on the type of the printed circuit board to be processed. Also, the number of holes processed is several hundred.
From a hole to several 10,000 holes. On the other hand, the number of holes that can be machined 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 to continue drilling.

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 a tool storage location number assigned to each tool storage location. Further, when a plurality of tools having the same diameter are stored in one tool storage device, the same tool number is assigned. Then, if there is a tool of the same tool number that has not reached the end of its life, it is determined that the tool can be replaced and the machining is continued.

In such a printed circuit board boring machine, it is necessary to periodically discharge a tool that has reached the end of its life, supply a new tool to the tool, and reset the number of times of tool use stored in the control device. become.

[0006]

Therefore, the main body of the drilling machine is stopped, the storage location of the tool and the number of times of use are displayed on the CRT of the control device, and the tool whose number of uses has reached the end of its life is confirmed. In addition to discharging, a new tool must be supplied to reset the number of times it has been used, which not only causes poor workability but also causes a decrease in the operating rate of the printed circuit board drilling machine.

In view of the above circumstances, an object of the present invention is to make it possible to visually identify a tool that has reached the end of its life, and to automatically reset the number of times of use of the tool stored in the control device. It is an object of the present invention to provide a printed circuit board boring machine capable of improving workability and operating rate.

[0008]

In order to achieve the above object, according to the present invention, a spindle head for supporting a tool, a printed circuit board and a table on which a plurality of tools are mounted are moved relative to each other to form a printed circuit board. The main body of the drilling machine that performs drilling, the input / output unit, the arithmetic unit, the tool number corresponding to each tool, the tool storage location number, the tool life set value, the number of times the tool has been used, the tool diameter, the machining conditions, etc. were stored. A printing system that is equipped with a control device that is composed of a memory device, selects the required tool from the tools on the table according to the machining program, and updates the number of times the tool is used in the memory device each time drilling is performed. In the board boring machine, the spindle head is provided with a coating means for coating the shank side end surface of the tool and a detecting means for detecting the shank side end surface of the tool. The binarization circuit binarizes the output means is provided, the output of the binarizing circuit, and adapted to apply to the arithmetic unit as a signal for resetting the tool usage count of the storage device.

[0009]

[Operation] And when exchanging tools during drilling,
After returning the tool held on the spindle to the table, the detecting means is opposed to the tool to be used next, the end surface of the tool on the shank side is detected, and the result is applied to the binarization circuit. The binarization circuit compares with a preset threshold value and outputs a signal of "0" or "1".

When the signal "1" is output from the binarization circuit, this signal "1" is applied to the arithmetic unit as a reset signal of the tool use frequency. The arithmetic unit resets the tool use frequency corresponding to the detected tool based on the signal "1". At the same time, the coating device is opposed to the detected tool, the coating is applied to the end surface of the tool, and then the tool is held on the spindle for the next processing.

When the output from the binarization circuit is "0", the tool is held on the spindle for the next machining.

When exchanging the tool on the table of the punching machine body, look at the end face of the tool and use a tool having the same diameter.
If the end faces of multiple tools are coated, all the coated tools are considered to have reached the end of their life except the last tool in the order of use of those tools, and those tools are discharged. At the same time, a tool having the same diameter as the discharged tool is supplied to it. As described above, since the tool use count of the storage device is reset when the tool is used, it is not necessary to reset the tool use count of the storage device when the tool is supplied.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 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 the printed circuit board boring machine, which is movably supported by a guide member (not shown). 3 is a nut,
It is fixed to the lower surface of the table 2. 4 is a lead screw,
It is rotatably arranged so as to be screwed with the nut 3, and is rotationally driven by a servo motor (not shown).

As shown in FIG. 2, the table 2 is divided into a processing area 2A on which the printed circuit board 1 is placed and a tool storage area 2B. The tool storage area 2B stores the table 2 in the tool storage device 5. The stored plurality of tools 6 are stored. In the tool storage device 5, according to the arrangement of the tools 6, the tool storage location numbers (AA to
KK) and corresponding tool numbers (No. 1 to No. 8) are assigned to each group of tools 6 having the same diameter.
A tool measuring device 7 is attached to the tool storage device 5 and is movably supported by a guide member (not shown) by means of eight sliders. Reference numeral 9 denotes a nut, which is fixed to the back surface of the slider 8. A feed screw 10 is rotatably arranged so as to be screwed with the nut 9, and is rotationally driven by a servo motor 11. A spindle head 12 is movably supported by the slider 8. A nut 13 is fixed to the back surface of the spindle head 12. 14 is a feed screw, which is rotatably arranged so as to be screwed with the nut 13.
It is rotationally driven by the servo motor 15. A spindle 16 is rotatably supported by the spindle head 12. A collet chuck 17 is supported by the spindle 16 so as to be openable and closable, and detachably supports the tool 6. 1
An air cylinder 8 is supported by the spindle head 12 via a bracket 19. A pressure foot 20 is supported by the air cylinder 18.

Reference numeral 21 is a detection means, which is supported by the spindle head 12 via a bracket 22. As shown in FIG. 4, the detection means 21 includes a base 25 having a light projecting element 23 and a light receiving element 24, a semitransparent mirror 26 facing the light projecting element 23, a reflecting mirror 27 facing the light receiving element 24, and It covers them or consists of a bar 28. The output of the light receiving element 24 is applied to the binarization circuit 29, as shown in FIG.

A coating means 30 is supported by the bracket 22. This coating means 30, as shown in FIG.
A cylinder 31 and a case 32 fixed to the bracket 22, an ink fountain 33 that is movably arranged in the case 32 and is supported by the cylinder 31, and has a felt impregnated with oil-based ink, and is fixed to the case 32. It is composed of a lid 35 rotatably supported by a shaft 34 and a torsion spring 36 for urging the lid 35 in a closing direction.

Reference numeral 40 denotes a control device, which is a paper tape reader 42 for reading a processing program recorded on a paper tape 41,
A keyboard 43 for inputting data not recorded on the paper tape 41, an input / output unit 45 including a CRT 44 for displaying input data and storage contents of a storage device described later, and an arithmetic unit 46 for comparing various data and arithmetic processing. The storage device 50 stores various data.

The storage device 50 stores the tools 6 stored therein.
Data table 51 for storing the tool number assigned for each diameter of the tool, a data table 52 for storing the tool storage location number corresponding to each tool stored in the tool storage device 5, and an individual tool 6 A data table 53 that stores the number of usable tools up to the life, a data table 54 that stores the number of times the tool 6 has been used, and the stored tools 6
A data table 55 for storing the diameter of the tool and a data table 56 for storing the processing conditions corresponding to the tool number.

With such a configuration, the control device 40 drives the punching machine main body in accordance with the machining program input from the input section 45 to punch the printed circuit board 1. At this time, every time the spindle head 12 moves up and down once, the stored contents of the data table 54 of the number of times of tool use of the tool 6 held by the spindle 16 are updated.

When the number of times of tool use of the tool 6 held on the spindle 16 reaches the tool life set value, or when machining with the tool 6 is finished and the tool 6 is instructed to be replaced, the spindle 16 is operated. The held tool 6 is returned to the original tool storage location of the tool storage device 5.

Then, the spindle head 12 is moved so that the detecting means 21 faces the tool 6 to be used next.
In this state, the light projecting element 23 is turned on, and the shank side end surface of the tool 6 is irradiated. The light reflected from the shank side end surface of the tool 6 is received by the light receiving element 24, converted into a voltage proportional to the intensity of the reflected light, and the result is applied to the binarization circuit 29. At this time, if the end surface of the tool 6 is a metal surface, the amount of reflected light increases, and if the end surface is a non-metal surface, the amount of reflected light decreases. The binarization circuit 29 compares it with a preset threshold value and outputs a signal of "0" or "1".

When the signal "1" is output from the binarization circuit 29, it is judged that the tool 6 is a new (unused) tool, and this signal "1" is stored in the data table 54. The calculation device 46 is used as a reset signal for the number of times the tool has been used.
Apply to. The arithmetic unit 46, based on the signal “1”,
The tool use count of the data table 54 corresponding to the detected tool 6 is reset. At the same time, the coating device 30 is opposed to the detected tool 6. Then, the cylinder 31 is operated and the ink fountain 33 is lowered. Then, the ink fountain 33 moves downward while pushing the lid 35 open, contacts the end surface of the tool 6, and applies paint (for example, black oil-based ink) to the end surface of the tool 6. When the cylinder 31 operates in the opposite direction to pull up the ink fountain 33, the action of the torsion spring 36 closes the lid 35. In this way, after coating the end surface of the tool 6 with the coating material, the tool 6 is held on the spindle 16 for the next processing.

When the signal "0" is output from the binarization circuit 29, it is judged that the tool 6 has not reached the end of its life, but has been used several times, and the data table 54 is used.
Without resetting the number of times of tool use stored in, the spindle 16 holds the tool as it is, and the next machining is performed.

When exchanging the tools 6 in the tool storage device 5, looking at the end faces of the tools 6, and when paints are applied to the end faces of a plurality of tools 6 with the tools 6 having the same diameter, those tools 6 are replaced. Except for the last tool 6 in the order of use, all the tools 6 to which the paint has been applied are considered to have reached the end of their life, and the tools 6 are discharged, and the tools 6 with the same diameter as the discharged tool 6 are discharged. Supply the tool 6. As described above, since the tool use count stored in the data table 54 of the storage device 50 is reset when the tool 6 is used, when the tool 6 is supplied, the tool use count stored in the data table 54 is reset. Need not be reset.

Therefore, the tool 6 can be replaced with respect to the tool storage device 5 by simply checking the presence or absence of ink application on the end surface of the tool 6 and replacing the tool 6 with the tool 6, thereby significantly shortening the replacement time. The workability can be improved and the operating rate of the printed circuit board drilling machine can be improved.

[0026]

As described above, according to the present invention, the spindle head that supports the tool and the printed board and the table on which the plurality of tools are mounted are moved relative to each other to form a hole in the printed board. Machine main body, input / output unit, arithmetic unit, and storage device that stores tool numbers, tool storage location numbers, tool life setting values, tool usage counts, tool diameters, machining conditions, etc. corresponding to each tool In a printed circuit board boring machine, which is equipped with a control device, selects a necessary tool from the tools on the table according to a machining program, and updates the number of times the tool is used in the storage device every time boring is performed, The spindle head is provided with coating means for coating the shank side end surface of the tool and detection means for detecting the shank side end surface of the tool, and binarizes the output of the detection means. Since the binarization circuit is provided and the output of the binarization circuit is applied to the arithmetic unit as a signal for resetting the number of times the tool has been used in the storage unit, simply checking whether or not ink has been applied to the end surface of the tool. Since only the tool needs to be replaced, the replacement time can be greatly shortened, the workability can be improved, and the operating rate of the printed circuit board drilling machine can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing a printed circuit board boring machine and its control device.

FIG. 2 is a plan view showing an arrangement state of tools.

FIG. 3 is an explanatory diagram showing stored contents of a data table in a storage device.

FIG. 4 is a front sectional view showing a detection unit and a coating unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Printed circuit board 2 Table 6 Tool 12 Spindle head 21 Detection means 29 Binarization circuit 30 Coating means 40 Control device 45 Input / output unit 46 Arithmetic device 50 Storage device

Claims (1)

[Claims] 1. A drilling machine main body for punching a printed circuit board by relatively moving a spindle head for supporting a tool, a printed circuit board and a table on which a plurality of tools are mounted, an input / output unit, and an arithmetic unit. , The tool number corresponding to each tool,
Equipped with a storage device that stores the tool storage location number, tool life setting value, tool usage count, tool diameter, machining conditions, etc., and selects the required tool from the tools on the table according to the machining program. Then, in the printed circuit board boring machine adapted to update the number of times the tool is used in the storage device each time when the boring process is performed, the spindle head has a coating means for coating the shank side end surface of the tool with coating means. A detection means for detecting the end surface of the tool on the shank side is provided, a binarization circuit for binarizing the output of the detection means is provided, and the output of the binarization circuit resets the number of times the tool has been used in the storage device. A printed circuit board boring machine characterized by being applied as a signal to the arithmetic unit.