JPS59124550A - Processing device - Google Patents

Abstract

PURPOSE:To make the accurate and rapid workpiece processing possible by making positioning by means of a positioning system using an adjusting control mechanism after the rough feed of the workpiece, in a device where the workpiece is processed along the mark thereon by adjusting the position of the mark on a position to be processed of the workpiece with the position of the processing machine. CONSTITUTION:A workpiece 10 such as a printed circuit board body is placed on a table 21, moved to the left with the aid of the rotation of a feed roller 34 by means of a motor 31, and the tip of the workpiece is allowed to make contact with a length measuring roll 41 of a feed amount detector 40, to prepare for processing. Then, the workpiece 10 is moved to the left by driving the motor 31 by an initiation command, but at that time output pulses from a feed amount detecting device 40 are counted in a counter when a mark 13 on the workpiece 10 is detected by means of a reference point detector 50, and the motor 31 is stopped to complete rough feed of the workpiece when said counted value coincides with the set value. Next, the mark 13 is detected by a mark detector 60, and an adjusting table of an adjusting mechanism 80 is displaced in the X and Y directions based on an output from said detector, allowing the processing machine 70 to be positioned with respect to the workpiece 10.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a processing apparatus that aligns a processing machine with a mark position of a workpiece in which a mark is attached to a place to be processed, and performs processing on the mark.

There are various types of machining, such as drilling holes, tapping screws, inserting pins into hole holes, and screwing screws, but in any of these machining operations, it is necessary to align the processing location of the workpiece with the processing machine prior to machining. is necessary.

Now, this positioning can be performed by two manual operations, but this requires skill and is also inefficient.

A possible solution to this problem is to adopt an automatic positioning method, which can be achieved by controlling the amount of feed of the workpiece by a feed control mechanism. That is, a reference point detector is installed at a predetermined value on the upstream side of the processing machine, and the reference point of the workpiece being transported by the feed mechanism is detected. By operating the feed mechanism until the output of the machine reaches a predetermined value, the reference point is moved to the processing machine position by -4, and the feed mechanism is stopped in the matched state.

By the way, feeding of a flat plate-shaped workpiece is performed while pressing the side surface of the workpiece against a guide wall arranged along the feeding direction in order to prevent the workpiece from wobbling laterally. It is inevitable that some meandering will occur due to engineering errors. Also.

When the workpiece itself has a large number of marks indicating its reference points, the pitches thereof vary to some extent. for example,
As shown in FIG. 1, a printed circuit board body 10 as a workpiece has a circuit 12'' and a pair of marks 13 and 14 indicating the insertion hole position of a press guide pin on a long resin substrate body 11. It is printed at predetermined intervals. Therefore,
It is difficult to process the sides (upper and lower sides in the figure) of the resin substrate 11 into accurate straight lines (this requires drilling guide pin insertion holes).

Although the circuit 12 and mark 13, 14 pairs are printed integrally, the pitch of the pairs also has some variation due to the accuracy of the printing feed control mechanism.

Therefore, one mark 13 moves in a meandering manner, and the reference point detector needs to have a detection surface that can cover at least the meandering width. This causes variations in the detection of the passing positions of the reference points, and also includes variations in the pitch between adjacent marks 13.

After all, in the above-mentioned feed control mechanism, it is difficult to accurately align the workpiece except for a workpiece that is specially manufactured with high precision.

Therefore, to consider manual alignment method again, the operating procedure is to first coarsely feed the workpiece to the processing machine's placement position so that the mark on the workpiece almost faces the position of the processing machine. And then...

Precise positioning, that is, alignment, is performed while monitoring the facing positional relationship directly or through a magnifying glass.

Then, the alignment using the feed control mechanism described above corresponds to coarse feed, and combining this with a mechanism that automates the alignment method 4
Precise positioning becomes possible by attaching it.

Based on the above idea, the present invention aims to provide a processing device that automates precise positioning, and the present invention aims to provide a processing device that automates precise positioning. A feed control mechanism that coarsely feeds the machine to the processing position.

The feed control mechanism combines the workpiece feed mechanism with an alignment control mechanism that aligns the processing machine with the mark on the workpiece with a rough feed rate of Hz. A reference point detector for detecting passage of the identification part, a feed amount detector for the workpiece, and a feed mechanism are arranged so that the amount of force of the feed amount detector after generation of the output from the reference point detector matches a predetermined value. The alignment control mechanism includes a mark detector in which detection elements are arranged in pairs in two directions on a plane with respect to the mark, and a processing 4.

An alignment mechanism that holds the mark detector and processing machine facing each other or in a predetermined positional relationship and fixed on an alignment table controls the alignment mechanism so that the outputs of each detection element pair of the mark detector match. First, the feed control mechanism coarsely feeds the workpiece to place the mark on the processing machine.
4 and 2, the alignment control mechanism is then controlled so that the mark detector is precisely opposed to the mark, and the processing machine is made to perform processing in that state.
Thereby, machining can be quickly performed at an accurate position on the workpiece.

Hereinafter, an embodiment of the present invention will be described in detail, in which the printed circuit board body 10 shown in FIG.

In FIG. 2 and FIG. 3 showing a cross section in the A-A direction, 20 is a machine base, on which the printed circuit board body 10 is placed, and on both sides of the table 21 are tables along the feeding direction. A protruding shaft 35 is supported on both sides of the rotating shaft 35, a feed roller 34 is fixed to the rotating shaft 35, and the rotating shaft 35 is connected to the motor 3.
1, and its feed roller 34
is pressed against the upper surface of the printed circuit board 10. Downstream of the feed mechanism 30 (on the left side of the figure), there is a feed amount estimating device consisting of a length measuring roller 41 rotatably supported on a shaft 42 extending inward from a mounting base 43 on the side wall of the table 21. 4
0 is arranged, and its length measuring roller 41 is connected to the printed circuit board 10.
It is pressed against the top surface of the printed circuit board 10 and converts the feed rate of the printed circuit board 10 into the number of pulses generated. A two-reflection type optical system reference point detector 51 is arranged downstream of the feed amount detector 40,
A detection surface of the reference point detector 51 is mounted on a mounting base 52 on the side wall of the table 21, and a hole is formed between the mark 13 on the printed circuit board 10 and the mark detector 61 on the upper and lower sides of the table 21 on the downstream side. A processing machine 70 for
As shown in the figure, both 61 and 71 are integrated by a frame 62 that runs outside the side wall of the table 21.

Its lower part is fixed on the alignment mechanism 80. and,
As shown in FIG. 6, the mark detector 61 includes a detection element A, which is a reflective light-conversion element whose detection surface is divided into four equal parts.
It consists of ~D, and its center is.

It is made to face the passage of mark 13. Also.

The processing machine 70 has a drill 71 facing upward and is movable up and down by an air cylinder 72. The center of the drill 71 and the center of the mark detector 61 are located on the same vertical line, facing the back surface of the printed circuit board body 10 .

Moreover, these mark detectors 61. The alignment mechanism 80 to which the processing machine 70 is coupled is fixed to the base 81 by fitting the sliding protrusion of the holding base 83 into the sliding groove bored in the base 81, as shown in FIG. Output shaft of pulse Tanabata 82 and holding stand 8
The holding table 83 is connected to the base 81 by ball connection between the three.
is moved forward and backward in response to the forward and reverse rotation of the pulse motor 82, and further.

A sliding groove is bored in the holding table 83 in a direction perpendicular to the sliding protrusion, and the sliding groove of the alignment table 84 is fitted therein, and the alignment table 81 is fixed to the holding table 83. Tapal Smoke 85
The frame member 62 is coupled with a ball screw so that it can be moved left and right in response to the forward and reverse rotation of the Tehal smoke 85, and the bottom of the frame 62 is fixed onto the alignment table 84. In FIG. 2.3, 90 is the mark detector 6
This is a presser roller mechanism provided downstream of 1, in which holders 91 and 92 are provided on both sides of the table 21, and a free roller 94 fixed to a shaft 93 supported by the holders 91 and 92 presses onto the printed circuit board 10. As a result, the printed circuit board 10 is held in contact with the table 21 by the feed roller 34 of the feed mechanism and the free roller 94.

Next, FIG. 8 is a block diagram of the control section of the feed mechanism 30 and the alignment mechanism 80, and the feed amount detector 41. Reference point detector 51. Mark detector 61. Motor 31 of the feed mechanism 30. Each motor 82, 85 . The cylinder 72 of the processing machine 70 is the same as described above.

First, the control section which is combined with the feed mechanism 30 and constitutes the feed/opening side 1 mechanism includes the feed amount detector 4]Q) output fufu counter 101, the output end of the preset counter 101, and the drive circuit 112 for the cylinder 72. The drive circuit for the motor 31 is connected to the input end of the force 11 machining end signal to stop driving each of the 11 machining end signals. The preset counter 101 counts the output of the feed amount detector 41 by 1 nocent according to the output of the feed amount detector 41.
When the count value matches the IJ cent value, Tanabata 31
is stopped.

Next, the control section which is combined with the matching mechanism 80 to constitute the matching control mechanism connects the output J terminals of the detecting element pairs AC, BD, CD, AB that match the valleys 1 of the mark detector 6 to the addition input terminals, respectively. Hardwired adders 104, 105.106.1
07, a comparator 108 whose comparison signal input terminal is connected to the output terminals of its adders 104 and 105, and adders 106 and 1.
Comparator 10 whose comparison signal input terminal is connected to the output terminal of 07.
9, and a drive circuit 110 for the motor 82, the input end of which is connected to the output end of the comparator 108, and a drive end signal input terminal connected to the output end of the preset counter 101.

The comparator 111 has an input terminal connected to the output terminal of the comparator 109, and another comparator 111 whose input terminal is connected to the drive stop signal output terminal of the drive circuit 110. After the control of the feed control mechanism is completed, first, two detection element pairs AC are applied to each of the upper and lower shoes.

The comparator 1.08 compares the magnitude of the sum of the BD outputs VA + VC and VB + VD, and depending on which one is the dog, a polarity signal is sent to the drive circuit 110, and the motor 82 is rotated forward or reverse accordingly. Holding stand 83 of alignment mechanism 80
(Fig. 5) is moved forward or backward, and the detection element pair AC! ,
The motor 82 is stopped when the sum of the BD outputs matches. During this time, the comparator 109 compares the sums VA + VB and Vc + VD of the outputs of the detection element pairs AB and CD in the direction orthogonal to the nine detection element pairs A, O, and BD, and the polarity signal is used to drive the motor 85. When a drive stop signal from one drive circuit 110 of the motor 82 is applied to the drive circuit 111, the motor 85 is rotated forward or reverse according to the polarity signal to align the alignment mechanism 80. By moving the stand 84 to the left or right, the detection element pair AB,
When the sum of the CID outputs matches, the motor 85 is stopped.

In the above, the workpiece 10 is placed on the table 21, the feed roller 34 of the feed control mechanism is pressed onto it, the motor 31 is rotated by a manual command, and the workpiece 10 is first moved to the left. The length measuring roll 41 is moved to reach the position of the feed rate detector 40, and the length measuring roll 41 is pressed onto the workpiece 10.

This makes the preparation complete, and a manual drive start command is given to the drive circuit 102 of the motor 31.

As a result, the motor 31 is driven, and the workpiece 0 is sent to the left. When the machining hole I3 on the workpiece 10 reaches a position facing the reference point detector 51, the preset counter 101 of the control section (FIG. 8) is reset by the output of the reference point detector 51, and Counting of the output pulses of the feed amount detector 40 introduced into the feed amount detector 40 is started. This preset counter 101 has a mark 1 on the workpiece 10.
The count value corresponding to the pinch of 3 is preset, and the count value of the output pulse of the feed amount detector 40 is set in advance.

When they match, a drive stop signal is applied to the drive circuit 102 and the motor 31 is stopped. Therefore, in this state, the mark 13 that has passed the position of the reference point detector 51 reaches the position of the mark detector 61 disposed downstream, which is separated by the pitch of the mark 13 from it, and furthermore, The tip is.

It is pressed onto the table 21 by the free roller 94 of the presser roller mechanism 90. -F is A of the workpiece 10
And it's a delivery.

Now, in this state, the mark 13 is facing the mark detector 61, but as described above, due to variations in the detection position of the mark 13 by the reference point detector 61 and uneven pitch of the mark 13, the mark 13 may It does not face the center of the mark detector 61, but 91J is offset in the direction of the detection element A of the mark detector 61, as shown in FIG. 7G).

The alignment control mechanism is for correcting this deviation, and when the rough feed is completed, a drive end signal from the drive circuit 102 is applied to the drive circuit 110 of the motor 82, and alignment in the 8 front and rear directions is first performed. be exposed. In this case, mark 13
almost faces the detection element A, therefore, the output VA+VC of the adder 104 is larger than VB+VD, and a positive polarity signal is sent to the drive circuit 110, so that the motor 82 rotates in the normal direction ξ. The holding table 83 moves forward.

A pair of a mark detector 61 and a processing machine 70 integrated therewith moves forward toward the mark 13, and as shown in FIG.

When the opposing areas of BD are equal, VA + VC and VB
'+VD match, and the motor 82 is stopped.

Subsequently, the drive end signal is applied to the second drive circuit 111 of the motor 85, and horizontal alignment is performed. In this case, mark 1 is shown in Figure 7(f)).
3 is located on the detection element AB side.

Therefore, the output VA + VB of the adder 107 is higher than Vc -1 - Vp, and a positive polarity signal is sent to the drive circuit 111. As a result, the motor 85 is rotated in the normal direction, and the matching table 84 is moved to the left. direction, and the pair of mark detector 61 and processing machine 70 integrated therewith moves to the left with respect to the mark 13, and as shown in FIG. 7e'1, the pair of left and right detection elements A13. When the opposing areas of CD are equal, VA -4-VB and Vc + VD match,
Motor 85 is stopped. The above is alignment, whereby the center of the remark 13 and the center of the mark detector 13 are aligned, and at the same time, on the back side of the mark 13, the center of the drill 71 of the processing machine 70 is also aligned with the center of the mark 13. It is brought into a state that matches. Below, this drive circuit 111
The drive end signal is applied to the drive circuit 112 of the air cylinder 72 of the processing machine 70, a hole is drilled from the back surface of the workpiece 10 at the mark 13, and after the processing is completed, the feed control [I A drive start signal is introduced into the drive circuit 102 of the mechanism, and the motor 31 is driven to repeat the above-described series of coarse feeding, alignment, and machining.

In the above embodiment, the case where the processing machine 70 is used as a hole-drilling machine is illustrated, but the same applies to other screw tapping machines, for example, and the mark 14 and the hole 71 of the processing machine 70 are also used. Another drill may be provided at the opposing position so that two holes can be drilled at the same time.

Further, in the above embodiment, the workpiece 10 is sent by a feed roller, but it may be transported by a conveying means such as a belt, and instead of holding the workpiece 10 by a free roller.

A suction disk may be provided on a part of the table 21 to suction the workpiece after rough feeding.

Also, the reference point detector 51. The mark detector 61 is not limited to a reflective photoelectric type, but a transmission type photoelectric type, and the mark is a through hole (however, the mark detector and processing machine are placed in a predetermined relationship position).
The same is true for .

Furthermore, instead of using one mark detector to detect the mark position, two marks are used, and the mark detectors are placed opposite to each other, and each mark detector has two detection elements, which detect positions 1d in different directions. The same thing can be done even if it is detected.

Further, although the reference point is shared by the mark representing the processing location, the same effect can be achieved even if the reference mark is printed separately.

Further, the same effect can be achieved even if the rotation sensor 2 of the feed roller 34 is used for detection instead of the feed amount detector 40.

As described above, the present invention provides a positioning system that combines a feed control mechanism for JJ feed of a workpiece and an alignment control mechanism after coarse feed to perform positioning and machining. That's what I did.

Positive 11'lli + and can be processed quickly 2
Work efficiency improves.

[Brief explanation of the drawing]

1 is a plan view showing an example of a workpiece, FIG. 2 is a plan view showing an embodiment of the present invention, FIG. 3 is a sectional view in the direction A and -A of FIG. 2, and FIG. FIG. 5 is a sectional view taken along line B-B in the figure, and a front view of the alignment mechanism. FIG. 6 is a plan view showing the detection surface of the mark detector. Figure 7 is a block diagram of the control unit for explaining the alignment operation. 20: Machine base; 30: Feed mechanism; 40: Feed amount detector; 50: Reference. Point detector, 61: Mark detector, 70: Processing machine, 80: Alignment mechanism, 101: Purisesotka τ Kunta,
102, 110-111: Drive circuit, 104-10
7: Adder, 108. 109: comparator mi<
Ono Sokki Co., Ltd. /-i::Ml, Representative Ono Yoshi-aki'gu', +:'; (a) (b) (/X) sweet r'r cause

Claims (1)

[Claims] 1. A feed control mechanism that coarsely feeds a workpiece with a mark attached at a machining location or at a predetermined distance from the machining location to a predetermined machining position, and , a processing device that has an alignment control mechanism that aligns the processing machine, and the feed control mechanism includes a feed mechanism for the workpiece and a reference point detector that detects passage of a mark or other identification part on the workpiece. , a feed amount detector for the workpiece, and a control unit that controls the feed mechanism so that the output of the generated pig feed amount detector of the output of the reference point detector matches a predetermined amount; A mark detector in which detection elements are arranged in pairs in two directions on a plane with respect to the mark, and a force d.
The machine tool, its mark detector, and the processing machine are held facing each other or in a predetermined positional relationship by an alignment mechanism fixed on an alignment table so that the outputs of each pair of detection elements of the mark detector match. A processing device consisting of a control section that controls an alignment mechanism.