JPH07328924A - Blast processing device - Google Patents

Abstract

PURPOSE:To invariably feed a constant quantity of an abrasive to a blast gun. CONSTITUTION:A recovery tank 5 storing an abrasive 99 is provided at the lower section of a cyclone 6 for classifying the abrasive 99. A screw pump 1 having an intake port 15 downward is provided at the lower section of the recovery tank 5. The screw pump 1 is constituted of a drive shaft 12 driven by a motor 7, a screw 11 made of a spring steel and connected to the drive shaft 12 at one end, and a tube 18 provided on its outside. A discharge port 19 opened to a buffer device 2 is provided at the tip section of the tube 18. The buffer device 2 is made of a J-shaped tube, and it is provided with an atmospheric pressure guide valve 91 at the upper end section 21 and an abrasive feed path 25 connected to a blast gun 8 at the lower end section 29. An abrasive feed quantity measuring device 3 is provided in the middle of the abrasive feed path 25.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blast processing apparatus for processing a workpiece by spraying a fine powdery abrasive from a blast gun at a high speed. The present invention relates to a blasting apparatus having an abrasive material supply device capable of stably supplying the blast gun.

[0002]

2. Description of the Related Art Generally, as a method of supplying an abrasive in a blasting machine, for example, Japanese Patent Laid-Open No. 4-87771.
As described in the publication, the abrasive stored in a recovery tank or the like is sucked into the blast gun by using the negative pressure generated by the ejector blast gun,
In this way, the polishing material in the recovery tank is mainly sent out in sequence.

[0003]

By the way, in the conventional device described above, the recovery tank and the blast gun are simply connected to each other by a simple abrasive material supply path (abrasive material supply tube) or the like. The amount of abrasive supplied to the blast gun is likely to fluctuate, and in some cases, a pulsation phenomenon may occur in the injection state of the abrasive from the blast gun. As a result, the amount of the abrasive material sprayed onto the work varies, which in turn results in processing unevenness. In order to solve such a problem, it is an object of the present invention to provide a blast processing apparatus capable of quantifying the amount of the abrasive supplied to the blast gun and performing stable injection of the abrasive. The object (problem) of the present invention.

[0004]

In order to solve the above problems, the present invention takes the following measures. That is, a fine powdery abrasive material is processed (work).
Blast gun to be sprayed toward, a cabinet containing the blast gun and the like, a recovery device for recovering the abrasives and the like used in the processing of the work, and an abrasive recovered by the recovery device. Regarding the blast processing device consisting of a cyclone and a recovery tank that stores the recovered abrasives classified by the cyclone for reuse,
An abrasive material supply pump (screw pump) for delivering the abrasive material collected in the recovery tank is provided in the lower portion of the recovery tank, and the abrasive material discharged from the screw pump is provided at the tip of the screw pump. Is provided with a buffer device formed of a J-shaped tube for temporarily accommodating the above, and further provided with an abrasive supply path (abrasive supply tube) that connects the tip of the buffer and the blast gun. I decided to adopt the configuration.

In such a construction, the screw of the screw pump is formed of an elastic member made of spring steel or the like, and one end of the screw is fixed to a drive shaft for driving the screw. The other end is supported in a free state, and further, the central part of the screw is formed in a hollow state, the drive shaft is extended and installed in the hollow part, and with this, it serves as a guide of the screw. We decided to adopt the configuration as described above.

Further, a transparent portion is provided in a part of the abrasive material supply path (abrasive material supply tube), and the cross-sectional shape of this portion is made into a quadrangle. , A slit, a light receiving means and the like are provided as abrasive material supply amount measuring means (abrasive material supply amount measuring device).

[0007]

By adopting the above construction, the following effects are exhibited in the present invention. First, the abrasive material 99 classified through the cyclone 6 is, as shown in FIG.
It is collected in the collection tank 5 and collected. This abrasive 99
Is sucked from the suction port 15 and discharged from the discharge port 19 by the operation of the abrasive material supply pump (screw pump) 1 including the drive shaft 12 driven by the motor (electric motor) 7 and the screw 11. By the operation of these screw pumps 1, the abrasives 99 collected in the lower part of the recovery tank 5 are sequentially sent to the buffer device 2.

By the way, the buffer device 2 is formed of a J-shaped tube, and
The J-shaped lower end portion 29 is provided with an abrasive supply passage 25 connected to the blast gun 8. When the blast processing device is operating, the blast gun 8 is
Since high-pressure air (compressed air) is jetted from,
Due to this high-pressure air injection, a negative pressure is generated in a part of the blast gun 8. Since this negative pressure acts on the abrasive supply path 25, the abrasive 99 sent to the buffer device 2 is acted on by the negative pressure.
Is the blast gun 8 via the abrasive supply path 25.
And is jetted toward the work together with the jetting of the high-pressure air.

In such a series of operations, the buffer device 2 has a considerably large volume (volume) as compared with the abrasive material supply passage 25 and the like.
The upper end portion 21 of the V-shaped tube is provided with an atmospheric pressure introducing valve 91 which is a variable valve for introducing atmospheric pressure. Then, by adjusting the atmospheric pressure introducing valve 91, the abrasive material 9 attracted by the negative pressure of the blast gun 8
The amount of 9 is controlled appropriately. Therefore, the abrasive supply path 25
The amount of the abrasive 99 supplied from the blast gun 8 to the blast gun 8 is stabilized and does not fluctuate. As a result, pulsation or the like does not occur when the abrasive 99 is ejected from the blast gun 8.

Further, a part of the abrasive material supply passage 25 has
As shown in FIG. 1, a transparent portion 251 is provided, and the transparent portion 251 is provided with an abrasive material supply amount measuring means (abrasive material supply amount measuring device) 3 including a light emitting means 31, a light receiving means 33 and the like. Therefore, whether the amount of the abrasive 99 supplied to the blast gun 8 is appropriate or whether the amount of the abrasive 99 supplied does not fluctuate due to the operation of the abrasive supply amount measuring device 3. A check will be performed. Based on the measurement result of the abrasive material supply amount measuring device 3, the atmospheric pressure introducing valve 91 provided in the buffer device 2 is adjusted, or the rotation speed of the motor 7 for driving the abrasive material co-feed pump 1 is adjusted. By adjusting (controlling) the abrasive material 9 to the blast gun 8
The supply amount of 9 is controlled to the optimum state.

Note that these control operations are mainly performed by an operator manually operating the control means 4 on the basis of the measurement data from the abrasive supply amount measuring means 3 to rotate the motor 7. Is controlled to adjust the discharge amount from the abrasive material supply pump 1 and the like. Alternatively, the data from the abrasive supply amount measuring means 3 may be directly input to the control means 4, and the rotation speed of the motor 7 or the like may be automatically controlled based on the result. In this case, feedback control is carried out, whereby the injection amount of the abrasive 99 from the blast gun 8 is controlled to the optimum state.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the configuration of the present embodiment includes a cabinet 9 for accommodating a work and the like, a blast gun 8 accommodated in the cabinet 9 for ejecting an abrasive 99 toward the work, and a blast gun 8 for the blast gun 8. Abrasive material 99
A tube-shaped abrasive material supply path (abrasive material supply tube) 25, a buffer device 2 connected to the abrasive material co-feed tube 25, and connected to a discharge port 19 of the abrasive material co-feed pump 1 described below, and the buffer. Abrasive 9 for device 2
The abrasive material supply pump 1 for discharging 9, the motor 7 for driving the abrasive material supply pump 1, the recovery device 95 for recovering the abrasive material 99 sprayed from the blast gun 8, and the recovery device 95 for recovery. It is composed of a cyclone 6 for classifying the used used abrasives, and a recovery tank 5 for collecting the abrasives 99 classified by the cyclone 6 and supplying the abrasives 99 to the abrasive supply pump 1. It is the basis.

In such a basic structure, the abrasive material co-feed pump 1 has a screw 11 formed by a continuous spiral and the screw 1 as shown in FIGS. 1 and 2.
It is basically composed of a drive shaft 12 for rotationally driving 1 and a tube 18 provided outside the screw 11 with a constant gap. In such a configuration, an inlet port 15 is formed at one end of the tube 18 so as to open downward and is formed at a lower portion of the recovery tank 5, and further at the other end. The discharge port 19 is provided on the side communicating with the buffer device 2.

Further, as shown in FIG. 2, the screw 11 of the present abrasive feed pump 1 having such a structure is formed of an elastic member such as spring steel, and
One end of the discharge port 19 is fixed to the drive shaft 12, thereby forming a fixed portion 111, and the other end, which is the discharge port 19 side to the buffer device 2, is in a free state, whereby a free end 119 is formed. It is supposed to be done. Further, as shown in FIG. 2, the screw 11 is formed by continuous rotation, and a hollow portion 115 is formed in the center thereof. Therefore, the screw guide 13 formed on the extension line of the drive shaft 12
Between and, it is in a non-bonded state (separated state). That is, the screw 11 is formed by a ribbon screw.

Therefore, between the screw guide 13 formed on the extension line of the drive shaft 12, as shown in FIG.
A gap (A) is formed. This gap (A) and the fact that the tip of the screw 11 is in a free state allow the screw 11 to elastically deform even if the abrasive 99 is partially hardened by moisture or the like. It is possible to avoid the biting phenomenon of the pump.

The motor 7 for driving the abrasive material supply pump 1 having such a structure is an electric motor or the like, and the driving force from the electric motor 7 is the pulleys 72, 7.
3, and a power transmission means 7 including a belt or a gear
It is adapted to be transmitted to the drive shaft 12 via 1 or the like. The control means 4 for controlling the rotation speed of the electric motor 7 is composed of a microcomputer or the like, and the rotation speed of the electric motor 7 can be appropriately controlled by a manual operation of an operator (operator). It can be done. In addition to the above-mentioned control method, the control means 4 may be adapted to receive a signal (data) from the abrasive material supply amount measuring means 3 to be described later and directly control it by an automatic control method. It is one that has become. In this case, the supply amount of the abrasive material 99 to the blast gun 8 can be feedback-controlled based on the signal from the abrasive material supply amount measuring means 3.

Next, the discharge port 1 of the abrasive material supply pump 1
The buffer device 2 that receives the supply of the abrasive material 99 from the
It is formed by a tube having a character shape, and has a configuration in which a constant space (volume) is provided for equalizing the fluctuation of the negative pressure generated by the blast gun 8. Is. With such a space (volume), the negative pressure is leveled, and even if the discharge amount of the abrasive material 99 from the abrasive material supply pump 1 varies due to elastic deformation of the screw 11, etc. The fluctuation of is also absorbed in this space. Further, a tubular abrasive material supply path (abrasive material supply tube) 25 connected to the blast gun 8 is provided from the lower end portion 29 of the buffer device 2, and the blasting is performed via the abrasive material supply tube 25. The negative pressure generated by the gun 8 is transmitted to the buffer device 2. Further, at the upper end portion 21 of the buffer device 2, an atmospheric pressure introducing valve 91 of a variable valve system for introducing atmospheric pressure into the buffer device 2 is provided. Then, by adjusting the opening degree of the atmospheric pressure introducing valve 91, the amount of the abrasive 99 sprayed from the blast gun 8 can be controlled.

Next, the abrasive material supply path 25, which connects the buffer device 2 and the blast gun 8 and transfers the abrasive material 99 to the blast gun 8, has a tubular shape. The transparent part 251 is provided in a part thereof. Then, in the transparent portion 251, an abrasive material supply path (abrasive material co-feed tube) 25
An abrasive supply amount measuring means 3 for measuring the amount of the abrasive 99 flowing inside is provided. As shown in FIG. 3, the abrasive material supply amount measuring means 3 has a light emitting means 31 for emitting laser light, the transparent portion 251 for receiving the laser light emitted from the light emitting means 31, and the transparent portion. 251
And a light receiving means 33 for detecting the transmitted light attenuated by passing through.

Further, on the side of the light emitting means 31, there is provided a slit 32 for preventing diffusion of emitted light from the light emitting means 31. In addition, the transparent portion 251 that receives the emitted light has a rectangular cross-section so that the emitted light is emitted at a right angle and transmitted in order to prevent diffuse reflection of the emitted light. Has been formed. In this way, the amount of the abrasive material 99 flowing through the transparent portion 251 per predetermined time is displayed on the display means 39 based on the transmitted light detected by the light receiving means 33. Is. The display means 3
Regarding the display on 9, the signal is directly sent to the display means 39 and a signal is sent to the control means 4 on the basis of the measurement data to rotate the motor 7 and thus the abrasive feed pump 1. It is also possible to consider a method of controlling the discharge amount from the. In this latter case, an automatic control system will be adopted.

In this structure, the abrasive 9
The blast gun 8 for injecting 9 toward the work (not shown) is of an ejector type,
High-pressure air is jetted from the nozzle at a high speed, and a negative pressure is generated on the back surface of the nozzle by the high-speed jet from the nozzle. Based on this negative pressure, the fine powdery abrasive material 99 is sucked, It is configured such that the sucked abrasive 99 is put on the above-mentioned high-speed jetting air and jetted onto the work. Further, a cyclone 6 for classifying the abrasive 99
Is configured to be pulled from a dust collector (not shown) or the like with a weak negative pressure, and grinding dust having a low specific gravity is sucked to the dust collector side. Is.
In the cyclone 6 of this embodiment, the damper 61 is appropriately provided so that the weak negative pressure on the dust collecting device side does not directly reach the abrasive 99 accumulated in the lower portion of the cyclone 6. It has a structure.

The operation mode and the like of this embodiment having such a configuration will be described. The basic operation mode of this embodiment is the same as that described in the above section of the operation. That is, as shown in FIG. 1, the abrasive material 99 classified by the cyclone 6 and collected in the recovery tank 5 is sucked by the abrasive material supply pump 1 driven by the motor 7 and sent to the buffer device 2. To be done. Then, the abrasive material 99 sent to the buffer device 2 is temporarily stored in the buffer device 2, and at the same time, is aspirated by the negative pressure generated by the blast gun 8 and the abrasive material supply passage 25.
And is jetted from the blast gun 8 toward the work.

In such a process, a transparent portion 251 is formed in a part of the abrasive material supply path 25, and the abrasive material supply amount measuring means 3 is provided in the transparent portion 251. From the abrasive supply amount measuring means 3
By means of the abrasive material 9 flowing in the abrasive material supply passage 25.
A quantity of 9 is measured. By controlling the control means 4 and the atmospheric pressure introducing valve 91 based on this measurement data, the supply amount of the abrasive 99 to the blast gun 8 is adjusted. In addition to the manual control of the operator (worker), the control system of the control unit 4 may be an automatic control system in which feedback control is performed based on a signal from the abrasive material supply amount measurement unit 3. .

Next, the abrasive material supply pump 1 is composed of a screw pump as shown in FIGS. 1 and 2.
Moreover, the screw 11 is made of an elastic member such as spring steel, and only one end is fixed to the drive shaft 12 in the longitudinal direction and the other end is free. Therefore, the delivery (supply) of the fine powdery abrasive material 99 is always performed smoothly.

That is, the abrasive 99 in the recovery tank 5 is partially hardened by moisture or the like to generate small lumps (secondary abrasive grains), which are narrowed (engaged) between the screw 11 and the tube 18. Even in such a situation, unlike the case of the conventional gear pump or the like, the pump does not lock. This is because the screw 11 according to this embodiment is made of an elastic member and has one end that is free, so that the pitches of the screw can freely change due to elastic deformation of the screw itself. Therefore, a certain pitch becomes long and a large amount of the abrasive 99 is accumulated, but the pitch between the adjacent pitches becomes short,
The screw 11 as a whole will be averaged.

Further, even if variations occur between the pitches as described above, a gap (A) is formed between the screw 11 and the screw guide 13 as shown in FIG. Through this gap (A), the abrasive 99 moves (escapes) between the adjacent pitches as shown by the broken line arrow, and the screw pump 1
At the discharge port 19 of, the discharge amount of the abrasive material discharged for each pitch is averaged. Therefore, the amount of the abrasive material supplied from the abrasive material supply passage 25 to the blast gun 8 is leveled.

The suction port 15 of the abrasive feed pump (screw pump) 1 is formed downward in the recovery tank 5 as shown in FIG. The flow direction of the abrasive material 99 sucked into the abrasive material supply pump (screw pump) 1 from 15 and the abrasive material 9 from the cyclone 6 toward the lower part of the recovery tank 5
The directions in which 9 falls are opposite to each other. Therefore, even if the abrasive 99 falling from the cyclone 6 toward the recovery tank 5 adheres to the wall surface of the recovery tank 5 or the like, the adhered abrasive 99 is caused by the rotational movement of the screw 11 of the screw pump 1. Is subject to vibration, and the abrasive 99 naturally flows toward the suction port 15 side with the vibration of the screw pump 1. Therefore, it is not necessary to separately provide a vibrator or the like for dropping the abrasive on the side wall of the recovery tank 5.

[0027]

EFFECTS OF THE INVENTION According to the present invention, a blast gun for injecting a fine powdery abrasive material toward a workpiece (work), a cabinet containing the blast gun and the like, and the above-described processing of the workpiece. It consists of a collection device that collects abrasives, a cyclone that classifies the abrasives collected by the collection device, and a collection tank that stores the collected abrasives that are classified by the cyclone for reuse. Regarding the blast processing device, in the lower part of the recovery tank, a screw pump for sending out the abrasive collected in the recovery tank is provided, and the tip of the screw pump is provided with the abrasive discharged from the screw pump. A buffer device composed of a J-shaped tube that is temporarily accommodated is provided, and further polishing for connecting between the tip portion of the buffer device and the blast gun. Since it was decided to adopt a structure formed by providing a supply channel (abrasive supplying tube), by the action or the like of the buffer device, the abrasive can now be uniformly supplied to the blast gun. As a result, in the spraying of the abrasive from the blast gun, it is possible to prevent the occurrence of a pulsation phenomenon and the like, and it is possible to prevent the occurrence of machining unevenness of the work.

Further, the screw of the abrasive feed pump (screw pump) is formed by an elastic member made of spring steel or the like, and further, one end of the screw is fixed to a drive shaft for driving the screw, and the other end is fixed. Is supported in a free state, and further, the central part of the screw is formed in a hollow state, and the drive shaft is extended and installed in the hollow part, which serves as a guide of the screw. Since the abrasive material collected in the recovery tank is agglomerated due to moisture or the like, the screw pump immediately bites by sucking the agglomerated secondary abrasive grains. There is no longer a case where the pump becomes inoperable due to a jamming phenomenon. That is, since the screw is formed of an elastic member such as spring steel, the center part is not fixed to the drive shaft and is free, so that the pitch of the screw can be freely expanded and contracted. As a result, it becomes possible to smoothly transfer the agglomerated abrasive material to the discharge port. In addition, since a gap is provided in the center of the screw, the abrasive can be moved between the pitches through this gap, whereby the amount of the abrasive discharged from the discharge port is It has come to be equalized in each pitch. As a result, the amount of abrasive supplied to the blast gun has become uniform.

Further, a transparent portion is provided in a part of the abrasive material supply path (abrasive material supply tube), and the cross-sectional shape of this portion is made into a quadrangle. Since the abrasive material supply amount measuring device (abrasive material supply amount measuring device) including a slit, a slit, and a light receiving device is provided, the abrasive material supply amount measuring device can be used in the abrasive material supply path. It is now possible to check the flow rate of the abrasives at any time.
It has become possible to always control the amount of abrasive sprayed from the blast gun to an appropriate value.

[Brief description of drawings]

FIG. 1 is a skeleton structure diagram showing an overall configuration of the present invention.

FIG. 2 is a diagram showing a configuration of a screw portion of an abrasive feed pump which is a main part of the present invention.

FIG. 3 is a skeleton structure diagram showing an overall configuration of an abrasive material supply amount measuring means which is a main part of the present invention.

[Explanation of symbols]

 1 Abrasive Material Supply Pump (Screw Pump) 11 Screw 111 Fixed Part 115 Hollow Part 119 Free End 12 Drive Shaft 13 Screw Guide 15 Suction Port 18 Tube 19 Discharge Port 2 Buffer Device 21 Upper End 25 Abrasive Material Supply Channel (Abrasive Material Supply Tube) 251 Transparent part 29 Lower end part 3 Abrasive material supply amount measuring means (abrasive material supply amount measuring device) 31 Light emitting means 32 Slit 33 Light receiving means 39 Display means 4 Control means 5 Recovery tank 6 Cyclone 61 Damper 7 Motor (electric motor) 71 Power transmission means 72 Pulley 73 Pulley 8 Blast gun 9 Cabinet 91 Atmospheric pressure introduction valve 95 Recovery device 99 Abrasive material

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[Procedure amendment]

[Submission date] November 10, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 1

[Correction method] Change

[Correction content]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction content]

[0004]

In order to solve the above problems, the present invention takes the following measures. That is, a fine powdery abrasive material is processed (work).
A blast gun to inject toward the cabinet incorporating the blast gun and the like, and a recovery apparatus for recovering the test of <br/> abrasives such as machining of the workpiece has been recovered by the recovery device Regarding a blast processing device consisting of a cyclone for classifying abrasives and a recovery tank, etc. that stores the recovered abrasives classified by the cyclone for reuse,
An abrasive material supply pump (screw pump) for delivering the abrasive material collected in the recovery tank is provided in the lower portion of the recovery tank, and the abrasive material discharged from the screw pump is provided at the tip of the screw pump. Is provided with a buffer device formed of a J-shaped tube for temporarily accommodating the above, and further provided with an abrasive supply path (abrasive supply tube) that connects the tip of the buffer and the blast gun. I decided to adopt the configuration.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

Further, a part of the abrasive material supply passage 25 has
As shown in FIG. 1, a transparent portion 251 is provided, and the transparent portion 251 is provided with an abrasive material supply amount measuring means (abrasive material supply amount measuring device) 3 including a light emitting means 31, a light receiving means 33 and the like. Therefore, whether the amount of the abrasive 99 supplied to the blast gun 8 is appropriate or whether the amount of the abrasive 99 supplied does not fluctuate due to the operation of the abrasive supply amount measuring device 3. A check will be performed. Based on this abrasive material supply amount measuring device 3 of the measurement result, by adjusting the atmospheric pressure introducing valve 91 provided in the buffer unit 2, or the rotational speed of the motor 7 for driving the abrasive supply pump 1 By adjusting (controlling) the abrasive material 9 to the blast gun 8
The supply amount of 9 is controlled to the optimum state.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the configuration of the present embodiment includes a cabinet 9 for accommodating a work and the like, a blast gun 8 accommodated in the cabinet 9 for ejecting an abrasive 99 toward the work, and a blast gun 8 for the blast gun 8. Abrasive material 99
The abrasive supplying passage (abrasive supplying tube) 25 tubular supplies, with leads to the abrasive supply tube 25, a buffer unit 2 connected to the discharge port 19 of the below mentioned abrasive supply pump 1, the buffer Abrasive 9 for device 2
The abrasive material supply pump 1 for discharging 9, the motor 7 for driving the abrasive material supply pump 1, the recovery device 95 for recovering the abrasive material 99 sprayed from the blast gun 8, and the recovery device 95 for recovery. It is composed of a cyclone 6 for classifying the used used abrasives, and a recovery tank 5 for collecting the abrasives 99 classified by the cyclone 6 and supplying the abrasives 99 to the abrasive supply pump 1. It is the basis.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction content]

In such a basic structure, the above abrasive
Supply pump 1, as shown in FIGS. 1 and 2, a screw 11 which is formed by a continuous helix, the screw 1
It is basically composed of a drive shaft 12 for rotating 1 and a tube 18 provided outside the screw 11 with a constant gap. In such a configuration, an inlet port 15 is formed at one end of the tube 18 so as to open downward and is formed at a lower portion of the recovery tank 5, and further at the other end. The discharge port 19 is provided on the side communicating with the buffer device 2.

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction content]

Next, the abrasive material supply path 25, which connects the buffer device 2 and the blast gun 8 and transfers the abrasive material 99 to the blast gun 8, has a tubular shape. The transparent part 251 is provided in a part thereof. And, this transparent portion 251, the abrasive supplying passage (abrasive supply tube) 25
An abrasive supply amount measuring means 3 for measuring the amount of the abrasive 99 flowing inside is provided. As shown in FIG. 3, the abrasive material supply amount measuring means 3 has a light emitting means 31 for emitting laser light, the transparent portion 251 for receiving the laser light emitted from the light emitting means 31, and the transparent portion. 251
And a light receiving means 33 for detecting the transmitted light attenuated by passing through.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Name of item to be corrected] 0027

[Correction method] Change

[Correction content]

[0027]

According to the present invention, the blast gun for jetting toward the fine powder-like abrasive to the workpiece (work), a cabinet incorporating the blast gun or the like, is subjected to machining of the workpiece It consists of a collection device that collects abrasives, a cyclone that classifies the abrasives collected by the collection device, and a collection tank that stores the collected abrasives that are classified by the cyclone for reuse. Regarding the blast processing device, in the lower part of the recovery tank, a screw pump for sending out the abrasive collected in the recovery tank is provided, and the tip of the screw pump is provided with the abrasive discharged from the screw pump. A buffer device composed of a J-shaped tube that is temporarily accommodated is provided, and further polishing for connecting between the tip portion of the buffer device and the blast gun. Since it was decided to adopt a structure formed by providing a supply channel (abrasive supplying tube), by the action or the like of the buffer device, the abrasive can now be uniformly supplied to the blast gun. As a result, in the spraying of the abrasive from the blast gun, it is possible to prevent the occurrence of a pulsation phenomenon and the like, and it is possible to prevent the occurrence of machining unevenness of the work.

Claims (5)

[Claims] 1. A blast gun for injecting a fine powdery abrasive toward a workpiece (work), a cabinet containing the blast gun and the like, and an abrasive and the like used in the processing of the workpiece. In a blast processing device consisting of a recovery device, a cyclone for classifying the abrasives and the like recovered by the recovery device, and a recovery tank and the like for storing the recovered abrasives classified by the cyclone for reuse,
An abrasive material supply pump for sending out the abrasive materials collected in the recovery tank is provided in the lower portion of the recovery tank,
A buffer device for temporarily containing the abrasive discharged from the abrasive supply pump is provided at the tip of the abrasive supply pump, and the tip of the buffer is connected to the blast gun. A blasting machine characterized by comprising an abrasive material supply path. 2. The blast processing apparatus according to claim 1, wherein the abrasive material supply pump is formed by a screw pump, the screw of the screw pump is formed by an elastic member, and one end of the screw is further formed. Connect the screw to a drive shaft that drives the rotation,
Moreover, the other end is supported in a free state, and an appropriate gap is formed in the center portion between the other end and the screw guide formed on the extension of the drive shaft. Characteristic blasting machine. 3. The blasting apparatus according to claim 1, wherein the buffer device is formed of a J-shaped tube, and the J-shaped tube is provided with an atmospheric pressure near a discharge port of the abrasive material supply pump. A blasting machine characterized by comprising an atmospheric pressure introducing valve for introducing the. 4. The blast processing apparatus according to claim 1, wherein a transparent portion is provided in a part of the abrasive material supply path, and the abrasive material supply amount measuring means including a light emitting means and a light receiving means is provided in the transparent part. A blasting machine characterized by having the above structure. 5. The blast processing apparatus according to claim 4, wherein the light emitting means of the abrasive material supply amount measuring means is formed by a laser light emitting means, and a slit is provided at the tip of the laser light emitting means. A blasting process, characterized in that the transparent portion is formed to have a quadrangular cross-sectional shape so that the laser light is radiated at right angles to the surface of the transparent portion. apparatus.