JP3281011B2 - Work adhesion oil recovery device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology for recovering a cutting oil used when cutting a machine part or the like, and quickly removes and collects oil adhering to a work (workpiece) itself. The present invention relates to a technology that enables reuse.

[0002]

2. Description of the Related Art During drilling and tapping of small machine parts such as nuts, a cutting oil is supplied by a pump to cool a cutting tool, and the work is fed by an automatic supply mechanism. Although continuous processing is performed while an oil agent is flowing between the workpiece and the workpiece, the oil agent adheres to the work or metal scrap after the processing, and various proposals have been made to reuse the oil agent. JP-A-2-83050, "Method for separating oil adhering to metal scrap", JP-A-2-21
In No. 8535 "Cutting oil recovery device", oil is separated from metal chips and chips using a centrifugal separator or stirring means, but no method for removing oil adhering to a processed work is found. .

[0003] A large amount of oil adheres to the processed work, but there is no effective method to remove it, and a large amount of work is accommodated in a sieve-like container and oil is dropped by gravity to fall naturally. It is common to collect the oil after waiting for separation. However, in such a batch processing method, when the concave portion of the work is open upward, oil remains, and even when the concave portion is downward, it takes a long time to separate the oil. Therefore, it is necessary to supply a large amount of oil to the processing device with a delay in collecting the oil. Further, if oil adheres to the work when entering a post-process such as plating, a cleaning process is required as a pre-treatment, and it takes time to drain the cleaning water containing oil.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to simultaneously process oil separation from a work within a cycle time parallel to a work process of the work instead of a batch-like operation.
An object of the present invention is to shorten the entire processing time of a workpiece and improve the processing efficiency. Another object of the present invention is to reduce the total amount of the oil supplied to the processing machine by shortening the oil recovery time, thereby saving resources. Yet another object of the present invention is to reduce the amount of oil remaining on the work and to facilitate the washing and draining work in the post-process,
It is to improve the efficiency of the entire process.

[0005]

The apparatus according to the present invention guides works one by one from a hopper into a cylindrical housing and blows compressed air (blowing air) in the housing. The oil agent is blown away from the nozzle and the mist-shaped oil agent is discharged to the outside using a suction pipe, thereby separating and collecting the oil agent from the work.

The apparatus of the present invention comprises a hopper for receiving a processed work, a sensor for detecting that the work has entered the hopper, a vertical cylindrical housing connected to the bottom of the hopper, An inlet-side gate valve that opens and closes by moving the upper part in the housing in the horizontal direction, a first drive mechanism that drives the inlet-side gate valve in the horizontal direction, and opens and closes by moving the lower part in the housing in the horizontal direction An outlet-side gate valve, a second drive mechanism for driving the outlet-side gate valve in a horizontal direction, one or more nozzles connected to a side surface of the housing to inject compressed air into the housing, and the nozzle Control means for adjusting the injection of air from the container, an exhaust pipe connected to the side surface of the housing for discharging mist-like oil from inside the container, and the second pipe in response to the sensor. The drive mechanism, the second driving mechanism,
And a control unit, the oil times for controlling the operation of said control means
It has a mist collector for collecting .

The housing is formed in a cylindrical shape with an open top and bottom, and slide-type gate valves (opening and closing doors) are arranged at the top and bottom of the housing, respectively. Side is opened and closed at a predetermined timing. At the top of the box-shaped housing, there is a work input hopper, and a transmission type photoelectric switch is provided in the passage of the work to output a gate valve opening / closing signal. The opening and closing timing of the gate valve is controlled by the circuit of the control device.

A nozzle connected to an external compressor to feed compressed air (blowing air) and a suction pipe for discharging mist-like oil are connected to the side surface of the housing. Air injection from the nozzle is controlled by a solenoid valve. The suction pipe is connected to the oil mist collector. Preferably, an exhaust fan or a vacuum pump is connected to the mist collector, and suction is performed using a suction pipe.

The operation of the device according to the invention is as follows. By default, the upper gate valve is in the open position and the lower gate valve is in the closed position. When only one workpiece with oil is released from the processing machine and passes through the hopper,
The upper gate valve is closed by detecting the work by the transmission type photoelectric switch. As a result, the housing is in a sealed state, the electromagnetic valve for air blowing is urged ON, and blowing air is jetted from the nozzle on the side of the housing. The air blows off the oil adhering to the work to form a mist, and sends the mist oil to the mist collector through a suction type exhaust pipe.

When the set time has elapsed, the air blow from the nozzle stops, the lower gate valve is opened, and the work falls into the storage container. When the lower gate valve closes again,
The upper gate valve opens and returns to the initial setting,
Prepare for the next work input. Since the oil agent is almost completely removed from the work, the subsequent oil removal step by dropping is omitted, and the production efficiency is improved. Further, even when entering a post-process such as plating, the oil does not adhere to the work, so that a cleaning process as a pre-treatment is almost unnecessary, and there is no trouble in draining waste water containing oil. The oil recovered as liquid oil in the mist collector returns to the oil tank via a pipe, and is again recycled as cutting oil for machining. The air blow time can be set arbitrarily within the processing cycle time of the target work, and the number and angle of the nozzles can be freely selected according to the size, shape, weight, and the like of the work.

Thus, according to the present invention, the oil adhering to the work is quickly removed, and there is no extra waiting time in the working process, so that the production efficiency is remarkably improved. Further, the cutting oil does not leak to the outside and contaminate the surroundings, thereby saving resources and protecting the environment.

[0012]

Next, the present invention will be described specifically with reference to examples. FIGS. 1 and 2 show a preferred embodiment of the apparatus of the present invention.
After the oil adhering to the work W in the housing 16 is removed by compressed air (air blow) in the housing 16, the oil is discharged from the outlet 36.

In FIG. 1, photoelectric type photo sensors 14 are arranged on both lower sides of a hopper 12, and a work W
Is detected as falling. A cylindrical housing 16 extending in the vertical direction is connected to the bottom of the hopper 12, and an inlet-side gate valve 18 which moves horizontally to partition the inside of the housing is provided at an upper portion and a lower portion inside the housing 16, respectively. And an outlet-side gate valve 24. These gate valves 18 and 24 are driven in the horizontal direction by air cylinders 22 and 26 fixed to the frame 20 of the apparatus 10, respectively.

A nozzle 28 for injecting compressed air into the housing is fixed to one side of the housing 16, and a compressed air source 60 (FIG. 3) is connected to the nozzle 28. A solenoid valve 66 (FIG. 3) serves as control means for adjusting the injection of air from the nozzle 28 into the housing 16.
Is connected. An exhaust pipe 34 is attached to another side of the housing 16 via a nipple 33 for discharging mist-like oil that has been forcibly removed from the work in the housing. A rubber pad 42 is attached to the inner surface of the housing 16 to prevent the work W from being damaged when the work W collides with a wall surface. Similarly, both upper and lower surfaces of the upper gate valve 18 and the lower gate valve 2
A rubber pad 44 is also attached to the upper surface of 4.

Further, a control device 40 (FIG. 3) for controlling the operation of the entire device 10 is provided.
4, the operation of the air cylinders 22, 26 and the solenoid valve 66 is controlled. The exhaust pipe 34 is connected to a mist collector 48 driven by a motor through a pipe, and the inside thereof is constantly sucked. Oil mist coming out of the exhaust pipe 34 is accumulated in the oil mist collector 48 and condensed into a liquid oil. Then, it returns to the oil tank 46 of the processing machine 80 (FIG. 4) and is recycled.

FIG. 3 shows a control circuit of the apparatus 10 according to the present invention, in which an air cylinder 2 for driving upper and lower gate valves is provided.
2 and 26 are controlled by receiving air supplied from an electromagnetic air valve 72 connected to a compressed air source 60. The injection of air from the nozzle 28 is controlled by supplying air from an electromagnetic air valve 66 connected to a compressed air source 60.

FIG. 4 shows an apparatus 1 for recovering oil adhering to a work according to the present invention.
0 represents a state in which it is arranged adjacent to the processing machine 80. The processed work W to which oil has adhered
2, falls in the direction of arrow F, and is fed into the hopper 12.

3 and 4, the work W from which the oil has been removed in the housing 16 hits a slanted oil drainboard-shaped sliding plate 78 and is discharged obliquely forward into a storage container 88. The slight oil that leaks from the bottom of the recovery device
The drain oil is collected in another container 77 by a tube connected to the drain port 76, collected, and reused. If the recovery device of the present invention is installed at a higher level than the oil tank 46 (FIG. 3) of the processing machine, the oil recovery tube can be directly connected to the oil tank of the processing machine for recycling.

The operation of the device 10 of the embodiment is as follows. By default, the upper gate valve 18 is in the open position and the lower gate valve 24 is in the closed position. When only one work W to which oil has adhered is released from the processing machine and falls onto the hopper 12, the work W is moved to the transmission type photoelectric switch 1
4 detects and sends a signal to the controller 40. Control device 40
Sends a signal to the solenoid valve 72 to energize the upper gate valve 18
Is slid horizontally to close the entrance to the housing 16. As a result, the housing 16 is sealed, and the control device 40 operates to operate the electromagnetic valve 6 for air blow.
6 is urged ON to blow air from the nozzle 28 on the side of the housing. The injected air blows off the oil adhering to the work W to form a mist, and discharges the mist to the mist collector 48 through the suction type exhaust pipe 34. Since the exhaust fan on the mist collector side is always rotating, the oil mist is immediately sucked into the mist collector side, where it is liquefied and collected, and the oil is returned to the oil tank 46 (FIG. 3) of the processing machine and recycled. Suction can also be performed using a vacuum pump instead of the exhaust fan.

After the elapse of the set time, the air blow from the nozzle 28 is stopped, the control device 40 operates to slide the lower gate valve 24 in the horizontal direction to be opened, and the work W hits the slide plate 78 and enters the storage container 88. And fall and are discharged. When the lower gate valve 24 is closed again, the upper gate valve 18 is opened to return to the initial setting state and prepare for receiving the next work.

Since most of the oil agent is removed from the work W, a cleaning step as a pre-treatment in a post-process such as plating is almost unnecessary, and the production efficiency is improved.
The oil agent collected as a liquid oil in the mist collector 48 is recycled again as a cutting oil for machining. The air blow time can be set arbitrarily within the processing cycle time of the target work.

In the above embodiment, an air cylinder is used to drive the gate valve, but a hydraulic cylinder, an electric motor, or the like may be used. Although it has been described that the workpieces are introduced into the housing one by one to remove the oil in principle, two or more workpieces may be introduced into the housing simultaneously or successively in order to shorten the cycle time. It is possible. In that case, it is desirable to take measures such as counting the number with a sensor or providing a sensor for detecting the height of the work so that excessive work is not put into the housing.

It is also possible to provide a plurality of nozzles for air blow, and by switching the number and direction of operation of the plurality of nozzles using a switching valve, an optimum air blow corresponding to the size and weight of the work is generated. be able to.

[0024]

As described above in detail, according to the apparatus of the present invention, the oil adhering to the workpiece is quickly removed, and no extra waiting time is caused in the machining cycle.
Manufacturing efficiency is significantly improved. According to the experiment, the amount of oil adhering to the workpiece and taken out of the machine was reduced by about 80%, to about 20% of the conventional amount. For this reason, the oil agent recovery operation by the conventional natural dropping method becomes unnecessary, and the necessity of using a centrifugal separator is eliminated, so that significant labor saving can be achieved. Since oil does not adhere to the workpiece even when entering a post-process such as plating, a cleaning process as a pre-treatment is almost unnecessary, and it is not necessary to waste time for drainage processing of cleaning water containing oil. Further, the technical effects are extremely remarkable, such as the cutting oil does not leak to the outside and contaminate the surroundings, thereby saving resources and protecting the environment.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a work adhering oil recovery device according to the present invention.

FIG. 2 is a right side view of the work adhering oil collecting device according to the present invention.

FIG. 3 is a schematic circuit diagram showing a pneumatic control system of the work adhering oil collecting device according to the present invention.

FIG. 4 is a right side view showing a state in which the work adhering oil recovery device according to the present invention is disposed adjacent to a processing machine.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Collection | collection apparatus 12 Hopper 14 Sensor 16 Housing 18 Inlet side gate valve 22 1st drive mechanism 24 Outlet side gate valve 26 2nd drive mechanism 28 Nozzle 32 Electromagnetic valve 34 Exhaust pipe 40 Control unit 46 Oil tank 48 Mist collector 60 Compression Air source 66 Solenoid valve W Work

Claims (1)

(57) [Claims] 1. A hopper for receiving a processed work, a sensor for detecting that the work has entered the hopper, a vertical cylindrical housing connected to a bottom of the hopper, and an upper part in the housing. An inlet-side gate valve that moves horizontally to open and close, a first drive mechanism that horizontally drives the inlet-side gate valve, and an outlet-side gate that horizontally moves and opens a lower part in the housing. A valve, a second drive mechanism for horizontally driving the outlet-side gate valve, one or more nozzles connected to the side surface of the housing and injecting compressed air into the housing, Control means for adjusting the injection; an exhaust pipe connected to the side of the housing for discharging mist-like oil from inside the container; and the first drive in response to the sensor Configuration, wherein the second drive mechanism, and a controller for controlling the operation of said control means
And a mist collector for collecting oil is connected to the exhaust pipe.
Connected to the mist collector,
Or a vacuum pump is connected and collected with a mist collector.
Oil that has been reused as cutting oil for machining.
Characteristic oil collecting device for workpieces.