JPS62136336A - Washing device - Google Patents

Abstract

PURPOSE:To efficiently perform washing of a processing hole without worsening an environment by providing each means of carrying-out, positioning and rotation of a pallet, and a closing and opening means of a door, a washing liquid injection nozzle and its driving means, a work identification censor and a control device. CONSTITUTION:After a work 33 on a pallet 21 sent with the use of a conveyor 6 is stopped with a stopper 10, the work 33 is positioned with a pallet positioning device 2 and a door 50 is closed at the same time. And a nozzle mounted on the end of the pipe 62 of a X-Y driver 52 is moved to be controlled, according to a hole position with the use of a control device, to inject a high pressure washing liquid and a processing hole on the first side is washed. At the same time a low pressure washing liquid is injected from an upper shower device 77 and an injection perforated plate 3 and the upper and lower surfaces to be of the work 33 are washed. The pallet 21 is rotated to indexed by means of an actuating cylinder 31 and after washing of respective processing holes on the whole surface is completed, the washing liquid is switched to air to carry out air blowing and the work 33 is carried out from a vessel after the door 50 is opened. Whenever the pallet 21 operates a limit switch 51, a slat conveyor 6 stops and a cycle ends.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a cleaning apparatus mainly for processing workpieces (hereinafter referred to as "workpieces") that have been machined with holes.

[Conventional technology]

Conventional cleaning equipment of this type has one shower type that sprays cleaning liquid from directly above the workpiece, and the other uses multiple nozzles that are simultaneously positioned to face multiple machined holes in the workpiece that are positioned at the cleaning position. There have been proposed systems in which the machined holes are cleaned at the same time, and systems in which the holes in the workpiece are sequentially cleaned using a spray nozzle attached to the wrist of an industrial robot.

[Problem that the invention seeks to solve]

However, with the single shower type, it is difficult to completely remove chips, dirt, etc. that have adhered to the machined hole. For machines that clean multiple holes at the same time, the number of nozzles is matched to the maximum number of holes on the machined surface, so cleaning fluid is wasted on a machined surface with a small number of holes, and the cleaning time depends on the type, size, and depth of the holes. Because of this, the cleaning liquid is wasted until all the holes that could have been cleaned earlier have been cleaned, making it impossible to save energy. In addition, there is a problem in that if the pinch of the machined hole changes, it takes time to adjust. If a robot has a spray nozzle attached to its wrist, the cleaning fluid, especially the atomized cleaning fluid, will stain the robot and surrounding machinery, impairing the work environment, and electrical equipment must be isolated to a safe location.

The present invention has been made in view of the above points, and it is possible to reliably clean the machined holes even if the pitch, type, depth, number of holes, etc. of the machined holes on each side of the workpiece are different. The purpose of the present invention is to provide a cleaning device that can perform cleaning automatically without any problems.

[Means for solving problems]

The structure of the present invention for achieving the above object will be explained using FIG. 1 and FIG. 2 which correspond to embodiments. Palette 2
means 6 for carrying the workpiece 33 above 1 into the cleaning tank main body 1 and carrying it out after cleaning; and means 3 for opening and closing n50 of the cleaning tank main body 1.
9.49, means 2 for stopping and positioning the pallet 21 at the cleaning position 10.38, and the positioned pallet 2
means 23, 31°79.70 for rotating the cleaning fluid 1 by a predetermined angle according to a command signal;
A drive device 52 that directs this injection nozzle 64 to a predetermined hole position based on a command signal, means 82 and 83 that exhaust the atomized cleaning liquid, and means that stops the pallet 21 carried out from the cleaning tank body 1 at the discharge end. 51, an identification sensor 22 that identifies the workpiece 33 before being carried into the cleaning tank main body, and a device that sequentially issues command signals to the devices and means based on a program corresponding to the signal from the identification sensor 22 to control the cleaning work of the workpiece. Consisting of

[For production]

When the door 50 of the cleaning tank body 1 is fully open, the pallet positioning device 2
When the pallet 2 assumes the origin position with zero rotation angle,
When the workpiece 33 positioned at No. 1 is sent in front of the cleaning tank main body entrance, the workpiece is identified by the workpiece identification sensor 22, a program is automatically selected according to the result, and a command signal issued from the NC device based on this program is used. The device is activated and the cleaning work is automatically performed.

First, the slat conveyor 6 is started and the pallet 21 is transferred to the cleaning position. When the pallet 21 is in the cleaning position, the stopper 10
When the slat conveyor 6 comes into contact with and stops, the drive of the slat conveyor 6 is stopped by a work position detection signal from the work position detection device 38, and the pallet 21 is positioned by the pallet positioning device 2. On the other hand, the door-equipped cylinder 49 is actuated by a signal from the pallet position detection device 39 that detects the pallet 21 slightly before the cleaning position, and the door 50 is closed.

When the pallet 21 is positioned by the pallet positioning device 2 and the door 50 is closed, the high-pressure cleaning liquid pump 75 is started, and the high-pressure cleaning liquid from the pump 75 overcomes the air pressure and passes through the shuttle valve 73 to the injection nozzle set in the XY drive device 52. Inject from 64. The tip of the injection nozzle 64 receives a command signal from the NC device before injection so that it matches the center line of the reference hole on the first side of the workpiece 33.
Since the position is determined by the drive device 52, when the high-pressure cleaning liquid is injected from the injection nozzle 64, chips, dust, etc. adhering to the inside of the hole are completely blown out of the hole and cleaned. This cleaning time is set in advance for each pore based on the size, depth, type, etc. of the pore. When the cleaning is completed, the XY drive device 52 positions the injection nozzle 64 at the next hole to be machined in response to a command signal from the NC device, and thereafter the multiple holes are similarly cleaned according to the NC program.

When the cleaning of the first side of the workpiece 33 is completed, the pallet 21 is rotated 906 times by an indexing device (not shown), and the processing holes on the second side are cleaned as described above. Clean the holes on the four sides one after another. When cleaning of all four surfaces is completed, the drive of the pump 75 is stopped. As a result, pressurized air passes through the shuttle valve 73 and blows away the cleaning liquid remaining in the pipe. At this time, the atomized cleaning liquid is exhausted by an exhaust fan 82.

When the cleaning liquid completely disappears from inside the pipe and the atomized cleaning liquid disappears inside the cleaning tank body 1, the XY drive device 52 injects the injection nozzle 64 into the processing hole as in the case of the cleaning liquid.
After positioning the workpiece 33, the cleaning liquid in the machined hole is blown with air pressure, and when the air blowing on the first side is finished, the workpiece 33 is rotated 90 degrees by the indexing device, and the workpiece 33 is rotated by 90 degrees to the machined hole on the second side as described above. Air blowing is performed, and when air blowing is completed on all four sides in the same manner, the air supply is cut off,
The exhaust fan 82 is stopped and the position of the pallet 21 is released. When the doors 50 on both sides of the cleaning tank main body are opened, the pallet 21 is carried out of the tank by the slat conveyor 6, and when it reaches the discharge end, the limit switch 51 is activated and the slat conveyor 6 is stopped by that signal, thus completing the automatic cleaning cycle. do.

〔Example〕

Embodiments of the present invention will be described based on the drawings. In FIGS. 1 and 2, a pallet positioning device 2 is installed vertically in the center of the cleaning tank body 1. Slat conveyors 6 each having an endless belt stretched by pulleys 4 and 5 on both sides of the cleaning tank main body 1 are disposed before and after the perforated injection plate 3 at the top of the pallet positioning device 2. The upper belt 7 of this slat conveyor 6 is supported and guided by a rail 8, and its height position is determined when the perforated injection plate 3 is at the lower limit.
The stopper 1 is higher than the figure) and is fixed to the injection perforated plate 3.
It is set slightly lower than the upper limit of 0. The drive pulley 4 includes a sprocket 14 and an endless chain 1 that are mounted on the same shaft.
A sprocket 14 is pivotally connected to a drive shaft of a drive motor 15 provided on one side wall 13 of the cleaning tank body 1 via a sprocket 2.
’. Between a pair of upper belt portions 17 protruding from the other side wall 16 of the cleaning tank body 1 is a movable work roller 2 that is raised and lowered by a roller lifting cylinder 18 so that the top surface of the roller is higher than the upper belt portion 17 at the upper limit.
0 and the upper limit work set roller 1 on the outside in the same row as this.
A fixed work roller 20 of the same level as 9 is provided. The sensor mounting bar 11 provided on one outside of the upper belt portion 17 has a workpiece positioning pin 66 (see FIG. 3) on the pallet 21 supported by the upper belt portion 17.
A work identification sensor 22 is attached to identify the work 33 that has been positioned. Further, a limit switch 51 is provided on the drive pulley 4 side of the slat conveyor 6 to detect the workpiece discharge end.
As shown in FIG. 3, the pallet positioning device 2 has a rotating shaft 23 with a perforated injection plate 3 protruding from the top.
is rotatably attached to the piston 26 of a vertical air cylinder 25 attached to the support frame 24 of the cleaning tank body 1 via bearings 27 and 28, and the lower end of the rotating shaft 23 is rotated on the bearing stand 29 of the support frame 24. The flange portion 30 is fixed to a removably mounted flange portion 30, and the flange portion 30 is connected to an output rotation shaft of an indexing device (not shown) which rotates by a predetermined rotation angle by an actuating cylinder 31 fixed to the support frame 24.

The rotating shaft 23 has a through hole 32 formed on its axis.
The upper end communicates with the nozzle hole 35 of the injection perforated plate 3 which injects cleaning liquid and pressurized air through the hole 34 of the pallet 21, and one end is connected to the rotary joint 36 at the lower end of the through hole 32.
A pipe 37 connected to is attached.

In the workpiece position detection device 38 shown in FIG. 2, when the workpiece 33 on the pallet 21 stopped by the stopper 10 of the pallet positioning device 2 is at a predetermined position, the limit switch 40 is activated to confirm the workpiece positioning. The pallet position detection device 39 shown in FIG. 4 is provided with a work-side cam 42 that contacts the pallet 21 at a position slightly before the pallet 21 contacts the stopper 10, and allows the work-side cam 42 to be rotated toward the cleaning tank body 1. It is connected to the attached outdoor rod 44 via a universal joint 43, and the movement of the cam 42 causes a cam 45 of the outdoor rod 44 to rotate against a spring 46, thereby operating a limit switch 47. The detection signal from this limit switch 47 activates the cylinder 49 with a door, and the window holes 4 in both side walls 13 and 16 of the cleaning tank body 1 are activated.
8 are each closed with a door 50.

An XY drive device 52 equipped with an NC device is provided on a pedestal 44 provided on the upper surface of the cleaning tank body 1. As shown in FIG. 5, this XY drive device 52 includes a stand 53, an X-axis circumferential servo motor 54, and a pole screw 55 connected to its output shaft.
A Y-axis circumferential servo motor 58 and its output are mounted on a Y-axis fixed frame 57 that is guided by the horizontal guide shaft 56 and screwed into the ball screw 55 with a ball nut (not shown). A ball screw 59 connected to the shaft and two vertical guide shafts 60 are installed vertically, and the vibro 2 is mounted on a pipe mount 61 that is guided by the vertical guide shaft 60 and screwed into the ball screw 59 with a ball nut (not shown). is installed vertically, and the lower end of the vibro 2 has an injection nozzle 64 facing the machining hole of the workpiece 33.
is installed horizontally via a pipe joint 63.

FIG. 6 shows a circuit diagram of cleaning liquid and air. Air pressure source 70
is the shuttle valve 7 via the pressure reducing valve 71 and the electromagnetic switching valve 72.
3. Connect to one of the primary boats of 74 and shuttle valve 7
A high-pressure cleaning liquid pump 75 is connected to the other primary port of the shuttle valve 74, and a low-pressure cleaning liquid pump 7 is connected to the other primary port of the shuttle valve 74.
Connect 6. The secondary port of the shuttle valve 73 is connected to the injection nozzle 64 via the vibro 2, and
The secondary port 4 is connected to the upper Java device 77 and the nozzle hole 35 of the spray perforated plate 3 of the pallet positioning device 2. The air cylinder 25 and operating cylinder 31 of the pallet positioning device 2 transfer air pressure from the pressure reducing valve 71 to the electromagnetic switching valve 78.
．． 79, and the side that does not lead to air pressure is open to the atmosphere.

A drain pan 80 is installed in the cleaning tank body 1 to collect the cleaning liquid from a drain hole 81 located at the lowest level of the drain pan 80.

The cleaning solution is returned to the tank (not shown) via a pipe. or,
An exhaust pipe 83 equipped with an exhaust fan 82 is connected to the cleaning tank body 1 to discharge the atomized cleaning liquid to the outside.

Now, with the doors 50 on both sides of the cleaning tank main body 1 fully open and the rotating shaft 23 of the pallet positioning device 2 taking the origin position of zero rotation angle and being at the lower limit, the pallet 21 with the workpiece 33 positioned by the workpiece positioning pin 66 is moved. When the workpiece 33 is set on the workpiece set roller 20, the workpiece identification sensor 22 of the sensor mounting bar 11 identifies the workpiece 33, automatically selects a program according to the result, and uses the command signal issued from the NC device based on this program to start the workpiece 33. is activated and cleaning work is performed automatically.

First, the pallet 21 with the workpieces 33 mounted thereon is moved onto the slat conveyor 6 by the lowering of the roller lifting cylinder 18 and is transferred to the cleaning position by the drive of the slat conveyor 6. When the pallet 21 comes into contact with the stopper 10 and stops, the limit switch 40 built into the workpiece position detection device 38
is activated and the drive of the slat conveyor 6 is stopped by the signal, and the electromagnetic switching valve 78 (Fig. 6) takes the position a and sends the air pressure from the air pressure source 70 to the lower chamber of the air cylinder 25, leaving the upper chamber to the atmosphere. open to As a result, the rotating shaft 2
3 rises, the positioning bin 9 of the pallet positioning device 2 fits into the positioning hole 19 of the pallet 21, and the pallet 2
1 is positioned at the cleaning position. On the other hand, just before the pallet 21 reaches the cleaning position, the work side cam 42 of the pallet position detection device 39 as shown in FIG.
7, the shouldered cylinder 49 is activated by the signal and the door 50 is closed.

Once the pallet 21 is positioned in the cleaning position and the door 50 is closed, the cleaning liquid pumps 75, 76 are activated. The high pressure (approximately 70 kgf/cJ) cleaning liquid from the high pressure cleaning liquid pump 75 overcomes the air pressure, passes through the shuttle valve 73, passes through the vibro 2 of the XY drive device 52, and is injected from the injection nozzle 64 at the tip. The tip of the injection nozzle 64 is connected to the first part of the workpiece 33.
Since the position is determined by the xy drive unit 252 which receives a command signal from the NC device before injection so as to match the center line of the standard machined hole on the side surface, when the high pressure cleaning liquid is injected from the injection nozzle 64, the hole is Chips and dirt adhering to the inside are completely blown out of the hole and cleaned. This cleaning time is set in advance for each company based on the size, depth, type, etc. of the hole. When the cleaning is completed, the XY drive device 52 positions the injection nozzle 64 at the next machined hole in response to a command signal from the NC device, and thereafter, each company is similarly cleaned according to the NC program. On the other hand, the low-pressure (1.5 kg f / ca?) cleaning liquid discharged from the low-pressure cleaning liquid pump 76 overcomes the air pressure, passes through the shuttle valve 74, and is injected from the upper Java device 77 and the injection perforated plate 3 of the pallet positioning device 2. The upper and lower surfaces of the workpiece 33 are cleaned.

When the cleaning of the first side surface of the workpiece 33 is completed, the electromagnetic switching valve 79 assumes position a, and the operating cylinder 31 uses air pressure to drive an indexing device (not shown) to rotate the rotating shaft 23 by 906 rotations. As a result, the second side of the workpiece 33 is indexed and cleaning of the machining hole on this side is started, while the electromagnetic switching valve 7
9 assumes the position, so only the operating cylinder 31 is shortened and returns to its original position.

Thereafter, the processed holes on each side are sequentially cleaned in the same manner. 4
When cleaning of both surfaces is completed, the drive of the pumps 75 and 76 is stopped, and the air electromagnetic switching valve 72 is activated to send pressurized air to the pipe via the shuttle valve 73 and 74 to blow away the cleaning liquid remaining in the pipe. . At this time, the atomized cleaning liquid is exhausted by an exhaust fan 82.

When the cleaning liquid in the pipe is completely exhausted and the atomized cleaning liquid in the cleaning tank main body 1 is also exhausted (set by a timer), the XY drive device 52 positions the injection nozzle 64 in the processing hole as in the case of cleaning liquid, and air is released. The cleaning liquid in the machined holes is blown with air by pressure, and when the air blowing of each hole on the first side is completed, 90° indexing is performed and the machined holes on the second side are sequentially blown with air. Similarly, when air blowing on the four surfaces is completed (set by a timer), the air electromagnetic switching valve 72 is closed to cut off the supply of pressurized air. Next, the drive of the exhaust fan 82 is stopped, and the cylinder with door 49 is operated in the door opening direction.
Furthermore, the electromagnetic switching valve 78 is switched from position a to position a, and the air pressure introduced into the upper chamber of the air cylinder 25 causes the rotating shaft 23 to
is lowered and the pallet 21 is placed on the slat conveyor 6 to release the positioning.

When the door 50 opens, the slat conveyor 6 is started and the workpiece 33 is
from the washing position to outside the tank. When the pallet 21 comes into contact with the limit switch 51 at the discharge end, the slat conveyor 6 is stopped by that signal and the automatic cleaning cycle is completed.

Although the present invention has been described in detail above, it goes without saying that the present invention is not limited to these embodiments, and can be modified in various ways without departing from the gist of the present invention. for example,
In this embodiment, the holes formed on the four sides of the workpiece were cleaned, but the holes on any side surface and the top surface may be cleaned. In this case, instead of the upper Java device 77, an
A drive device is required.

〔Effect of the invention〕

As is clear from the above explanation, according to the present invention, a workpiece in front of the entrance of the cleaning tank main body is identified by a work identification sensor, and an injection nozzle that accurately captures the machining hole in the cleaning tank main body based on a corresponding program is used. Impurities such as chips are completely removed from the machining hole by spraying high-pressure cleaning liquid, and then dry cleaning is performed by air blowing, so the pinch, type, size, depth, number of holes, etc. of the machining hole are completely eliminated. It is an excellent product that can efficiently perform appropriate and reliable cleaning even on different workpieces without deteriorating the surrounding work environment, and can significantly improve cleaning accuracy, as well as save labor and energy. have an effect.

[Brief Description of the Drawings] The drawings show this embodiment. Figure 1 is a front view of the embodiment, Figure 2 is a partially sectional side view of the same, and Figure 3 is a vertical cross-section of the pallet positioning device and the pallet. 4 is a perspective view of the pallet position detection device, FIG. 5 is a perspective view of the XY drive device, and FIG. 6 is a circuit diagram of cleaning liquid and pressurized air. 1. Washing tank body, 2. Pallet positioning device, 6.
・Slat conveyor, 10...stopper, 21...pallet, 22...work identification sensor, 23...rotation axis,
31... Operating cylinder, 33... Work, 38... Work position detection device, 39... Pallet position detection device, 49
...Cylinder with door, 50.. Door, 52..

Claims (1)

[Claims] A means for carrying workpieces on a pallet into the cleaning tank body and taking them out after cleaning, a means for opening and closing the door of the cleaning tank body, a means for stopping and positioning the pallet at the cleaning position, and a means for moving the positioned pallet by a command signal. A means for rotating a predetermined angle, an injection nozzle that communicates with the high-pressure cleaning liquid pump and an air line via a shuttle valve, a drive device that directs the injection nozzle to a predetermined hole position based on a command signal, and a workpiece before being carried into the cleaning tank main body. 1. A cleaning device comprising: an identification sensor for identifying the work; and a device for sequentially issuing command signals to the device and means based on a program corresponding to a signal from the identification sensor to control cleaning work of the work.