JPH05317629A - Dust collector for printed circuit board processing machine - Google Patents

Abstract

PURPOSE:To additionally enhance the efficiency of cooling a drill and to speed up the processing. CONSTITUTION:A pair of bag separators 11a, 11b which are connected in parallel to a pipe 8 connecting a discharge device 15 and a pressure foot and are connected discretely to the discharge device 15, an intermediate tank 13 which recovers the cooling liquid separated by these bag separators 11a, 11b, a cooling liquid recovering tank 19a which recovers the cooling liquid recovered in the intermediate tank 13 and a filter 23 which filters the cooling liquid of the recovering tank 19a are provided. A supply tank 19b which stores the cooling liquid filtered by the filter 23, a temp. controller 24 which is mounted to the supply tank 19b and controls the temp. of the cooling liquid and a pump 25 which pumps up the cooling liquid in the supply tank 19b and supplies the liquid through a pipe 9 to the blow-off port of the pressure foot are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust collector for a printed circuit board processing machine, and more particularly to a dust collector for a printed circuit board processing machine which supplies cooling liquid into a pressure foot to improve the cooling efficiency of a tool. The present invention relates to a dust device.

[0002]

2. Description of the Related Art In a printed circuit board processing machine such as a printed circuit board drilling machine, compressed air is blown from a pressure foot toward a drill as disclosed in, for example, Japanese Patent Laid-Open No. 3371/1993. Things have been proposed. In such a device, when the printed board is processed, the compressed air blown into the pressure foot rapidly expands, lowering the temperature inside the pressure foot,
The cooling efficiency of the drill can be improved. Further, there is an advantage that the air flow in the pressure foot is increased and the chips can be discharged reliably.

[0003]

However, when the machining speed is increased, the cooling effect becomes insufficient, which causes problems such as increased wear due to a rise in temperature of the drill and deterioration of machining quality.

In view of the above circumstances, an object of the present invention is to provide a dust collecting device in a printed circuit board processing machine for further increasing the cooling efficiency of the drill and increasing the processing speed.

[0005]

In order to achieve the above object, in the present invention, an exhaust device and a suction port connected to the exhaust device are formed in a central portion, and a tip portion is internally cooled. A pair of liquid outlets that are connected in parallel to a pressure foot that covers the tip of the spindle of a printed circuit board processing machine and a pipe line that connects the exhaust device and the pressure foot, and that are individually connected to the exhaust device. Of the bag separator, an intermediate tank for collecting the cooling liquid separated by the bag separator, a cooling liquid tank for collecting the cooling liquid collected in the intermediate tank, and the pressure by pumping the cooling liquid from the cooling liquid tank. A pump for supplying to the outlet of the foot was provided.

Further, an exhaust device and a suction port connected to the exhaust device are formed in the central portion, and a cooling liquid outlet is formed inward at the tip end portion of the spindle end portion of the printed circuit board processing machine. A pressure foot to cover, a pair of bag separators connected in parallel to a pipe line connecting the exhaust device and the pressure foot, and individually connected to the exhaust device, and a cooling liquid separated by the bag separator. An intermediate tank, a cooling liquid recovery tank for recovering the cooling liquid recovered in the intermediate tank, a filter for filtering the cooling liquid in the recovery tank, a supply tank for storing the cooling liquid filtered by the filter, and a supply A temperature controller attached to the tank for controlling the temperature of the cooling liquid in the supply tank, and the pressure foot for pumping up the cooling liquid in the supply tank. It provided a pump to be supplied to the air outlet.

[0007]

Then, while the printed circuit board is being processed, the exhaust device exhausts the pressure foot, and the cooling liquid sent from the pump is blown into the pressure foot through the outlet of the pressure foot. Then, the cooling liquid blown into the pressure foot is atomized from the outlet and spreads in the pressure foot, and then is sucked from the suction port together with the cutting chips toward the exhaust device. At this time, part of the atomized cooling liquid contacts the drill and evaporates, and the heat of vaporization cools the drill. When sucked from the suction port and drawn into the bag separator, the bag filter separates the cooling liquid together with the chips, and only air is exhausted from the exhaust device. On the other hand, the chips captured by the bag filter remain in the bag filter, and the coolant is dripped from the bag filter and collected at the bottom of the bag selector, and then temporarily collected in the intermediate tank. Will be collected. Then, it is supplied again from the supply tank to the pressure foot. Further, the cooling liquid collected in the supply tank may be filtered by a filter and then temperature-controlled to be supplied to the pressure foot.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.
It will be explained based on. Reference numeral 1 denotes a printed circuit board, which is integrally connected to the lower plate 2 and fixed to a table (not shown) of the printed circuit board punching machine. A drill 3 is detachably supported by a spindle (not shown) of the printed circuit board drilling machine. A pressure foot 4 is slidably supported in the axial direction by a spindle unit (not shown) that rotatably supports the spindle, and is directed toward the table by an air cylinder (not shown). Being energized. The pressure foot 4 has a suction port 5 formed at the center in the axial direction, a cooling liquid discharge port 6 formed inward at the tip, and a groove 7 formed on the surface in contact with the printed circuit board 1. There is. Then, the suction port 5 and the blow-out port 6 are connected to the dust collecting device 1 via pipes 8 and 9, respectively.
It is connected to 0.

The dust collector 10 has a structure as shown in FIG. In the figure, 11 (a, b) are bag separators, which are connected in parallel to the pipe 8 connected to the suction port 5 of the pressure foot 4 via valves 12 (a, b), respectively. 13 is an intermediate tank, an automatic valve 14
It is connected to the bug separator 11 (a, b) via (a, b). An exhaust device 15 is connected to the bag separator 11 (a, b) via a switching valve 16 and is connected to the intermediate tank 13 via an automatic switching valve 17. An automatic valve 18 is connected to the discharge port of the intermediate tank 13.
The automatic valve 14 (a, b), the automatic switching valve 17, and the automatic valve 18 are drive-controlled in a predetermined order by a controller (not shown).

A cooling liquid tank 19 is partitioned by a partition plate 20 into a recovery tank 19a and a supply tank 19b. Reference numeral 21 denotes a pump, which is arranged in the recovery tank 19a. A valve 22 is connected to the pump 21. A filter 23 is connected to the valve 22. Reference numeral 24 denotes a temperature control device, which is arranged in the supply tank 19b. A pump 25 is arranged in the supply tank 19b, and is connected to the blowout port 6 of the pressure foot 4 through the pipe 9.

The bag separator 11 (a, b) is constructed as shown in FIG. In the figure, 11
c is a casing, and the suction port 11d and the air discharge port 11
e and the cooling liquid discharge port 11f are formed. 11
Reference numeral g denotes a bag filter, which is arranged in the casing 11c so as to cover the suction port 11d. A partition plate 11h is arranged so as to cover the upper portion of the bag filter 11g.

With such a configuration, the bug separator 11a
When using, the switching valve 16 is set to the bag separator 11
While switching to the a side, the valve 12a is opened and the valve 12b is closed. Then, the bug separator 11a and the pipe 8
The pressure foot 4 and the exhaust device 15 are connected through. In this state, the exhaust device 15 is actuated and the pump 25 is actuated to supply the cooling liquid accumulated in the supply tank 19b to the outlet 6 of the pressure foot 4, and the cooling liquid is introduced from the outlet 6 into the pressure foot 4. Blow out. Then, since the pressure inside the pressure foot 4 is negative, the cooling liquid becomes a mist and spreads into the pressure foot, and is sucked from the suction port 5 to the bag separator 11a.

The amount of the cooling liquid that can be blown into the pressure foot 4 within a range that does not contaminate the printed circuit board with the cooling liquid is, for example, when the difference between the atmospheric pressure and the inlet pressure of the exhaust device 15 is 1600 mmAq or more.
It can be 0.59 l / min.

In this state, the printed board 1 is processed. At this time, when the mist-like cooling liquid comes into contact with the drill 3 whose temperature has risen due to processing, the heat of the drill 3 evaporates the cooling liquid, and the heat of vaporization thereof is removed to cool the drill 3. The cooling liquid blown into the pressure foot 4 and the cutting chips generated by processing pass through the pipe 8 and the valve 12a together with the air sucked from the groove 7 of the pressure foot 4 and are sucked into the bag separator 11a. Then,
The flow velocity decreases in the bag separator 11a, the cutting chips and the cooling liquid fall into the bag filter 11g, and only the air passes through the upper portion of the bag filter 11g and is exhausted from the exhaust device 15. On the other hand, the cooling liquid dropped in the bag filter 11g passes through the lower portion of the bag filter 11g and drops into the casing 11c together with the fine chips, and only chips larger than the eyes of the bag filter 11g enter the bag filter 11g. Remain.

When a predetermined time elapses after the exhaust device 15 is operated, the control device is operated to close the automatic valve 18 and switch the automatic switching valve 17 to connect the intermediate tank 13 to the exhaust device 15. The inside tank 13 is evacuated. When the pressure in the intermediate tank 13 becomes the same as the pressure in the bag separator 11a, the control device operates the automatic valve 14a to connect the bag separator 11a and the intermediate tank 13 to each other. Then, the cooling liquid accumulated in the casing 11c flows into the intermediate tank 13 through the automatic valve 14a. After a certain period of time, the control device closes the automatic valve 14a and activates the switching valve 17 so that the intermediate tank 13
Make the inside communicate with the atmosphere. Then, the automatic valve 18 is opened and the cooling liquid collected in the intermediate tank 13 is transferred to the cooling liquid tank 19
To the recovery tank 19a. The timing of discharging the cooling liquid from the bag separator 11a may be set according to the amount of the cooling liquid supplied to the pressure foot 4 and the capacity of the bag separator 11a.

On the other hand, the cooling liquid recovered in the recovery tank 19a is pumped up by the pump 21, fed into the filter 23 through the valve 22, filtered by the fine chips, and then stored in the supply tank 19b. At the same time, the temperature controller 24 controls the temperature to a predetermined temperature. By providing such a temperature control device 24, the temperature rise of the cooling liquid can be suppressed and the drill 3 can be cooled more efficiently.

The bug filter 11 of the bug separator 11a
In order to remove the cutting chips accumulated in g, the bag separator 1
When switching to 1b, the valve 12b is opened and the valve 12a is closed. Then, the switching valve 16 is switched to disconnect the bag separator 11 a from the exhaust device 15 and connect the bag separator 11 b to the exhaust device 15. at the same time,
The switching is set in the control device. Then, take out the bug filter 11g from the bug separator 11a,
Remove the chips collected in it.

[0018]

As described above, according to the present invention, the exhaust device, the suction port connected to the exhaust device in the central portion, and the cooling liquid blowing port toward the inside are formed in the tip portion. A pressure foot covering the spindle tip of the printed circuit board processing machine, a pair of bag separators connected in parallel to a pipe line connecting the exhaust device and the pressure foot, and individually connected to the exhaust device, An intermediate tank that collects the cooling liquid separated by the bag separator,
Since a cooling liquid tank for collecting the cooling liquid collected in this intermediate tank and a pump for pumping the cooling liquid from this cooling liquid tank and supplying it to the outlet of the pressure foot are provided, the cooling efficiency of the drill is improved and machining is performed. It is possible to increase the speed.

Further, an exhaust device and a suction port connected to the exhaust device are formed in a central portion, and a cooling liquid outlet is formed inward at a tip end portion of the spindle end portion of a printed circuit board processing machine. A pressure foot to cover, a pair of bag separators connected in parallel to a pipe line connecting the exhaust device and the pressure foot, and individually connected to the exhaust device, and a cooling liquid separated by the bag separator. An intermediate tank, a cooling liquid recovery tank for recovering the cooling liquid recovered in the intermediate tank, a filter for filtering the cooling liquid in the recovery tank, a supply tank for storing the cooling liquid filtered by the filter, and a supply A temperature controller attached to the tank for controlling the temperature of the cooling liquid in the supply tank, and the pressure foot for pumping up the cooling liquid in the supply tank. Since there is provided a pump for supplying the air outlet, it is possible to enable higher speed further increase processing speed, the cooling efficiency of the drill.

[Brief description of drawings]

FIG. 1 is a front sectional view showing a main part of a pressure foot of a printed circuit board processing machine to which the present invention is applied.

FIG. 2 is a configuration diagram showing a configuration of a dust collector.

FIG. 3 is a configuration diagram of a bug separator in FIG.

[Explanation of symbols]

 4 ・ ・ ・ ・ ・ Pressure foot, 5 ・ ・ ・ ・ ・ ・ ・ Suction port, 6 ・ ・ ・ ・ ・ ・ ・ Blowout port, 8 ・ ・ ・ ・ ・ ・ ・ Piping Road, 11a, 11b ... Bag separator, 13 .... Intermediate tank, 15 ... ··· Supply tank, 23 ···· filter, 24 ··· temperature controller, 25 ··· pump.

Claims (2)

[Claims] 1. An exhaust device, a suction port connected to the exhaust device at a central portion, and an outlet for cooling liquid toward the inside are formed at a tip end portion of a spindle end portion of a printed circuit board processing machine. A pressure foot to cover, a pair of bag separators connected in parallel to a pipe line connecting the exhaust device and the pressure foot, and individually connected to the exhaust device, and a cooling liquid separated by the bag separator. An intermediate tank, a cooling liquid tank for collecting the cooling liquid collected in the intermediate tank, and a pump for pumping the cooling liquid from the cooling liquid tank and supplying it to the outlet of the pressure foot are provided. Dust collector for printed circuit board processing machines. 2. An exhaust device, a suction port connected to the exhaust device in the central portion, and an outlet for the cooling liquid formed inward at the tip end portion. A pressure foot to cover, a pair of bag separators connected in parallel to a pipe line connecting the exhaust device and the pressure foot, and individually connected to the exhaust device, and a cooling liquid separated by the bag separator. An intermediate tank, a cooling liquid recovery tank for recovering the cooling liquid recovered in the intermediate tank, a filter for filtering the cooling liquid in the recovery tank, a supply tank for storing the cooling liquid filtered by the filter, and a supply Mounted on the tank,
A printed circuit board processing machine comprising: a temperature control device for controlling the temperature of the cooling liquid in the supply tank; and a pump for pumping up the cooling liquid in the supply tank and supplying it to the outlet of the pressure foot. Dust collector in.