JP2893126B2 - Ice grain shot blasting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD OF THE INVENTION

The present invention relates to an ice grain shot blasting machine,
More specifically, the present invention relates to an ice grain shot blasting apparatus that uses ice grains as processing particles and sprays the ice grains onto a workpiece.

[Prior art]

Conventionally, for example, in the case of a workpiece such as a vehicle part having irregular irregularities on its surface, a shot blasting apparatus has been widely used for its polishing, deburring, cleaning, etc. due to its excellent processing characteristics. . Generally, solid particles such as metal particles and sand are used as the processing material. However, since the solid particles are solid particles, the solid particles remain on the workpiece after processing, and the solid material is assembled as it is. When the assembly is performed, assembly failure occurs due to the remaining solid particles, and even if assembly failure does not occur, there is an inconvenience that various malfunctions occur due to the presence of the solid particles caught between parts during assembly. Was. Therefore, instead of the solid particles such as the metal particles and sand, ice particles are used as the processing particles, and the ice particles are shot toward the workpiece to remove burrs and the like adhered to the surface by the ice particles. A blasting device has been proposed (for example,
No. 57 gazette).

[Problems to be solved by the invention]

In the ice grain shot blasting apparatus, a large amount of ice grains are used in the ice grain spraying section in order to continuously inject ice grains with compressed air and hit the workpiece. Further, since the deburring cannot be performed completely unless the spray amount of these ice particles is constant, it is necessary to use the ice particles stably and quantitatively. For these reasons, it is necessary to provide an ice particle storage unit for always storing a fixed amount of ice particles in the apparatus. However, in this case, since the ice particles themselves have a unique property of sticking together with other ice particles and forming a lump, if left as it is in the ice particle storage unit, when spraying toward the workpiece, There is a disadvantage that the device is clogged by the ice droplet ejecting unit and hinders the operation of the device. The problem to be solved by the present invention is to provide an ice grain shot blasting apparatus which does not have the above-mentioned drawbacks of the conventional apparatus, in other words, the ice grains pass through the ice grain separation passage of the ice grain transport section. In doing so, the blocks of ice particles that have adhered to each other are separated into individual ice particles, and the separated ice particles are supplied to the ice particle ejecting section so that clogging of the ice particles does not occur in the ice particle ejecting section. Another object of the present invention is to provide an ice particle shot blasting apparatus which enables stable injection of ice particles.

[Means for Solving the Problems]

The present invention adopts the following constitution as means for solving the above-mentioned problems. An ice grain shot blasting apparatus according to the present invention includes an ice grain storage unit for storing ice grains of a predetermined size, an ice grain ejecting unit for injecting the ice grains toward a workpiece by a pressure fluid, In an ice grain shot blasting apparatus including an ice grain transport unit that transports ice grains stored in a storage unit to an ice grain ejecting unit, an ice grain separating passage is provided in a part of the ice grain transport unit,
The ice particle separation passage includes two surfaces facing each other with a passage width therebetween, and at least one of the two surfaces is formed of an uneven surface that moves in the direction of transport of the ice particles of the rotating body, In addition, when the passage width is such that the clumps of ice particles fixed to each other pass through the ice grain separation passage, relative movement can be generated between the individual ice grains constituting the chunk, and the ice grains can be separated into individual ice grains. It is characterized in that the transport amount of ice particles is controlled by controlling the rotation speed of the rotating body.

[Action]

In the ice grain shot blasting apparatus of the present invention, ice grains of a predetermined size are stored in the ice grain storage section in advance, and the ice grains stored in the ice grain storage section are transported to the ice grain ejection section by the ice grain transport section. Therefore, even when a large amount of ice particles are used, the ice particles can be used stably and quantitatively. In addition, even if the ice particles adhere to each other in the ice particle storage unit and form a lump, an ice particle separation passage is provided in a part of the ice particle transport unit provided between the ice particle storage unit and the ice particle ejection unit. The ice particle separation passage is provided with two surfaces facing each other while maintaining the passage width, and at least one of the two surfaces is an uneven surface that moves in the direction of transport of the ice particles of the rotating body. And the passage width is such that when the mass of ice particles fixed to each other passes through the ice particle separation passage, relative movement occurs between the individual ice particles constituting the mass, and Since it has a size that can be separated, in the ice particle separation passage of the ice particle transport unit,
Since the clumps of ice particles that have adhered to each other are separated into individual ice particles and sent to the ice particle ejecting unit, the ice particles can be stably ejected without clogging of the ice particles.

【Example】

Embodiments of the present invention will be described in detail with reference to the accompanying drawings. As shown in FIG. 1, an ice maker 1 continuously produces ice particles of a predetermined size from industrial water or recovered water supplied from a water recovery device 15. The ice particles are conveyed to the ice particle storage unit 2 and temporarily stored therein. The ice particle storage unit 2 is provided with a means such as stirring so that the ice particles do not adhere to each other and form a lump in the stored state. Have been. The ice grains stored in the ice grain storage unit 2 are conveyed to the ice grain jetting unit 4 quantitatively and continuously by the operation of the ice grain transport unit 3, and at this time, the clumps of ice grains fixed to each other become the initial ice grains. Separated and transported. The ice particle storage unit 2, the ice particle transport unit 3, and the ice particle injection unit 4
Is connected to a refrigerator 5, which cools each part 2 to 4 to prevent melting of ice particles. Air is supplied from the air supply unit 6 to the ice particle injection unit 4. As the air supply unit 6, for example, a factory air supply source or a dedicated compressor is used. By the operation of the ice particle ejecting unit 4, ice particles are ejected from the nozzle 7 toward the workpiece 8 by air pressure. The ice particle ejecting unit 4 is provided with a nozzle position moving device 9,
By the operation of the nozzle position moving device 9, the nozzle 7 is moved to a desired position, and ice particles are sprayed on a predetermined position of the workpiece 8. When necessary, the workpiece 8 is moved or inverted by the workpiece movement reversing device 10 to spray ice particles on its surface. The workpiece movement reversing device 10 is provided with a tank 11, and the workpiece 8 is disposed above the tank 11.
The ice particles sprayed on the surface and the burrs removed by the ice particles fall and are stored in the tank 11. The burrs stored in the tank 11 are collected by a burr collecting unit 12, and the water stored in the tank 11 is treated by a water treatment device 13 and discharged as factory wastewater. Further, the treated water treated by the water treatment device 13 is supplied to a cleaning unit 14, which cleans the workpiece 8 and the workpiece movement reversing device 10. Further, the treated water treated by the water treatment device 13 is recovered by the water recovery device 15 and supplied to the ice making machine 1, and the water is continuously collected by the ice making machine 1 as described above. To be. As shown in FIGS. 2 to 4, the inside of the housing 20 of the ice particle storage unit 2 is partitioned by partitions 21 and 22, and the storage room 23 and the transfer room 2 are separated.
4 are formed. Ice particles are temporarily stored in storage room 23,
In the storage room 23, a stirring bar 25 is rotatably provided. The stirring rod 25 is driven by a stirring motor M1 provided on the upper part of the housing 20, and stirs ice particles in the storage room 23 to prevent the ice particles from sticking to each other to form a lump. A transfer screw 27 is provided in the transfer chamber 24 so as to be rotatable in the horizontal direction, and the transfer screw 27 is driven by a storage unit transfer motor M2. The rotation of the transfer screw 27 causes the storage room 23
Is continuously transported in the horizontal direction. Outlet of transfer room 24
Ice particles fall from 28 and are transported to the ice particle transport unit 3. The outlet 28 is formed by cutting the bottom wall of the housing 20 obliquely, so that a fixed amount of ice particles can be carried out. A separation roller 31 is rotatably provided substantially at the center of the housing 30 of the ice particle transport unit 3, and the separation roller 31 is driven by a separation motor M3. Projection 31 on the surface of separation roller 31
a is formed, an upper guide 32 is provided above the separation roller 31, a lower guide 33 is provided below the separation roller 31, and an inclined guide 34 is provided opposite the separation roller 31. An ice particle separation passage 35 is formed by causing relative movement of the ice particles fixed to each other at 31 to 34 to separate and pass the individual ice particles. The upper guide 32 and the inclined guide 34 are provided in the transfer chamber of the ice particle storage unit 2.
Holding the ice particles including the clumps of ice particles fixed from each other from the outlet 28 of 24, and guiding this to the peripheral surface of the separation roller 31,
With the rotation of the separation roller 31, the protrusion 31a scrapes off the ice particles held by the inclined guide 34 and the upper guide 32, and guides the ice particles between the inclined guide 34 and the separation roller 31, and the inclined guide 34
And the separation roller 31 cause the mass of ice particles fixed to each other to move relative to each other, separate into individual ice particles, and pass them in the initial state. The ice particle separation passage 35 has a passage width D (a passage width large enough to allow individual ice particles that are not fixed to each other to pass) such that ice particles fixed to each other do not pass. When the chunk passes through the passage width D, relative movement occurs between the individual ice grains constituting the chunk, and the individual ice grains are separated into individual ice grains and returned to the initial state. Therefore, it is possible to carry out a fixed amount of ice particles without lump to the ice particle ejecting section 4. The lower guide 33 is a guide cylinder 36 provided at the lower portion of the housing 30 by separating ice particles separated into individual pieces together with the inclined guide 34.
Lead to. The interior of the housing 30 is divided by an upper guide 32, a separation roller 31, and a lower guide 33, and an ice particle discharge chamber 37 for discharging crushed ice particles is formed on the opposite side of the ice particle separation passage 35. The rotation of the separation roller 31 causes the ice particles sandwiched between the projections 31a to come into contact with the upper portion of the lower guide 33 and peel off, and is discharged to the ice particle discharge chamber 37, whereby a lump of ice particles grows between the projections 31a. To prevent them from growing. A discharge port 30a is formed at the bottom of the ice particle discharge chamber 37, and unnecessary ice particles guided by the inclined surface 33a of the lower guide 33 on the side of the ice particle discharge chamber 37 are discharged from the discharge port 30a. Outlet 30a
A toy 26 is provided at the lower part of the container, and receives and flows the ice particles discharged from the discharge port 30a, so that the ice particles accumulate more and more in the ice particle discharge chamber 37, and the rotation of the separation roller 31 is stopped. To prevent An upper end 38a of a bellows hose 38 is attached to a guide cylinder 36 provided at a lower portion of the housing 30. A part of the outer peripheral surface of the bellows hose 38 is held by a guide tube 39, and the guide tube 39 prevents the bellows hose 38 from bending. A lower end portion 38b of the bellows hose 38 is connected to a connection hole 40a of the housing 40 of the ice particle jetting unit 4 to transfer the ice particles to the transfer chamber 41 in the housing 40.
Lead to. The bellows hose 38 allows the ice particle ejecting section 4 to move up and down. The inside of the housing 40 of the ice particle jetting unit 4 is transported by a partition plate 42
The partition plate 42 is formed with a discharge passage 42a that guides ice particles from the transfer chamber 41 to the spray unit 43. A transfer screw 44 is rotatably provided in the transfer chamber 41, and the transfer screw 44 is an injection unit transfer motor.
Driven by M4. The transport screw 44 continuously transports the ice particles in the transport chamber 41 and discharges the ice particles from the discharge passage 42a to the jetting unit 43. The discharge passage 42a is formed by obliquely cutting the partition plate 42, and a constant amount of ice is formed. The particles can be discharged to the injection unit 43. Factory air at a predetermined pressure is supplied from the air hose 45 to the jetting unit 43, and the ice particles supplied into the jetting unit 43 are jetted toward the workpiece 8 by the nozzle 7. In this way, the ice particles separated by the ice particle transport unit 3 are supplied to the ice particle ejecting unit 4 in a fixed amount,
Further, in the ice particle ejecting section 4, a fixed amount of ice particles is supplied to the ejecting section 43 by the operation of the transport screw 44, so that the nozzle 7 is not clogged with the ice particles and the apparatus can be operated without any trouble. A nozzle moving device 9 is provided in the ice particle ejecting unit 4. When the rotation shaft 90 is rotated by the position adjusting motor M5, the ice particle ejecting unit 4 moves up and down on the rotating shaft 90, whereby the nozzle 7 is moved. Moves. The workpiece 8 is moved and inverted by a workpiece movement reversing device (not shown), and the sprayed ice particles are applied to the entire surface of the workpiece 8 to be deburred. The ejected ice particles and the removed burrs are collected in a tank 11, where they are turned into water by the ice particles, overflow and are supplied to a water treatment device 13, and the burrs remain in the tank 11. The water treatment device 13 is provided with a washing unit 14, which injects water from the pipe 141 to the workpiece 8 by driving the pump 140 to wash the workpiece 8 after the injection of the ice particles. In addition, water treatment equipment 13
Can discharge the treated water through a pipe 130 or supply the treated water to an ice maker via a water recovery device (not shown). In this embodiment, the inclination guide 34 and the separation roller 31
The ice particles are guided between the two, and the two move relative to each other in the lump of ice particles fixed to each other, are separated into individual ice particles, and pass through in the initial state in the ice particle separation passage 35. Although it is formed, similar separation rollers 31 may be provided facing each other without using the inclined guide 34 to form an ice particle separation passage. Further, instead of the separation roller 31, the ice particle separation passage may be formed by a belt having an uneven surface. The control device 200 of the ice grain shot blasting machine of the embodiment will be described with reference to the control diagram of FIG. In this ice particle shot blasting apparatus, for example, a control device 200 is configured by a microcomputer, and a power button 202, an injection amount setting button 203,
A nozzle position operation button 204 and the like are provided, and a command is input to the control device 200 by an operation of an operator. The operation is started by operating the power button 202, and the stirring motor M1 of the ice making machine 1 and the ice grain storage unit 2 is driven. The stirring motor M1 always rotates at a constant speed during operation. By operating the nozzle position operation button 204, the position adjusting motor M5 of the ice particle ejecting unit 4 is driven, and the nozzle 7 is driven at a predetermined position. The injection amount of the ice particles is set by operating the injection amount setting button 203, and based on this setting, the controller 200 sets the air pressure of the air supply unit 6, the rotation speed of the injection unit transport motor M4, and the rotation speed of the separation motor M3. Set and set the number of rotations of the storage unit transport motor M2. In addition, the control device 200 includes an air pressure sensor 300, an injection amount sensor 301, an ice particle passage amount sensor 302, an ice particle separation passage ice particle passage amount sensor 303, and an ice particle storage unit ice particle passage amount sensor. 304, detection information from the ice particle storage unit stock amount measurement sensor 305 is input. The air pressure sensor 300 is provided in an air supply system to the ice particle ejecting unit 4, and controls the air supply unit 6 based on the pressure information to make a predetermined air pressure. The injection amount sensor 301 is provided in the ice particle ejection unit 4, measures the amount of ice particles supplied to the ice particle ejection unit 4, compares the measured amount of ice particles to the workpiece 8, and compares the actual amount of ice particles to the workpiece 8. Control so that the amount becomes the set value. The ice-particle ejecting section ice-particle passing amount sensor 302 is provided in the transfer chamber of the ice-particle ejecting section 4, and supplies the set amount of ice particles by controlling the ejecting section carrying motor M4 based on the ice-particle passing amount information. .
The ice particle separation passage ice particle passage amount sensor 303 is provided in the ice particle separation section, detects the amount of ice particle passage passing through the ice particle separation passage, and controls the separation motor M3 based on this ice particle passage amount. The ice particle storage unit ice particle passage amount sensor 304 is provided in the transfer chamber of the ice particle storage unit 2, detects the amount of ice particle passing through the transfer chamber, and controls the storage unit transfer motor M2 based on the amount of ice particle passage. Control. Ice particle storage unit stock amount measurement sensor 305 is ice particle storage unit 2
In the storage room, the amount of ice particles in the storage room is measured, and based on the information on the amount of ice particles, the amount of ice particles carried out of the ice making machine 1 is controlled to always store a predetermined amount of ice particles in the storage room. . The operation of the control device 200 will be described with reference to the operation flowchart of FIG. A predetermined ice particle injection amount is set by operating the injection amount setting button 203 (step a), and the injection unit transport motor M4, the separation motor M3, and the storage unit transport motor M2 are set so as to obtain the set ice particle injection amount. Is set (steps b to d). Further, the amount of ice particles supplied from the ice maker 1 to the ice particle storage unit 2 is set (step e). By driving these actuators, the ice particles are separated into individual ice particles in the ice particle separation passage 35 of the ice particle transport unit 3 on the way from the ice particle storage unit 2 to the ice particle ejecting unit 4. Is transported to the ice particle ejecting section 4
Then, the actual supply amount of ice particles is measured from the supply amount of ice particles (step f). It is determined whether the actual supply amount of ice particles is as set (step g). If the set value is satisfied, the current state is maintained (step h). If the actual supply amount of ice particles is larger than the set value in step g, the supply amount from the ice maker 1 to the ice particle storage unit is reduced (step i). On the other hand, if the actual supply amount of ice particles is too small in step g, the rotation speed of the injection unit transfer motor M4 is increased (step j), and whether or not the passing amount of the transfer screw 44 has reached the set value is determined. Is determined (step k), and when the amount of passage reaches the set value, the rotation speed of the separation motor M3 is increased (step l). Then, it is determined whether or not the passing amount of the ice particle transporting section 3 through the ice particle separating passage 35 has reached a set value (step m). Until this passing amount reaches the set value, the rotation speed of the separation motor M3 is determined. Raise. When the passing amount of the ice particle separation passage 35 reaches the set value, the rotation speed of the storage unit transport motor M2 is increased (step n), and the transport screw 27 is driven. When the amount of ice particles passing by the increase in the rotation speed of the transport screw 27 reaches the set value (step o), the supply amount from the ice maker 1 to the ice particle storage unit 2 is increased (step p), and the process proceeds to step f. Transition. As described above, in this embodiment, the amount of ice particles jetted by the ice particle jetting unit 4 can be set arbitrarily.

【The invention's effect】

(A) An ice grain shot blasting apparatus according to the present invention comprises: an ice grain storage section for storing ice grains of a predetermined size; an ice grain jetting section for jetting the ice grains toward a workpiece by a pressure fluid; An ice grain shot blasting apparatus including an ice grain transport unit that transports ice grains stored in the ice grain storage unit to an ice grain ejecting unit, wherein an ice grain separating passage is provided in a part of the ice grain transport unit. The ice particle separating passage has two surfaces facing each other with a passage width therebetween, and at least one of the two surfaces is formed by an uneven surface that moves in the direction of transport of the ice particles of the rotating body. And when the chunks of ice particles fixed to each other pass through the ice-grain separation passage, a relative movement is generated between the individual ice particles constituting the chunks to separate the ice particles into individual ice particles. The size of the ice is controlled by controlling the rotation speed of the rotating body. Since the amount is controlled, the ice grains are stored in the ice grain storage section in advance, and the ice grains stored in the ice grain storage section are transported to the ice grain ejection section by the ice grain transport section, Even when a large amount of ice particles are used, the ice particles made in advance are stored in the ice particle storage unit, so that the ice particles can be used stably and quantitatively. (B) The ice grain shot blasting apparatus of the present invention is provided with an ice grain separation passage in a part of the ice grain transport section, and has two surfaces facing each other with a width of the ice grain separation passage, When at least one of the two surfaces is formed of an uneven surface that moves in the direction of transport of the ice particles of the rotating body, and the passage width is such that a lump of ice particles fixed to each other passes through the ice particle separation passage. In addition, the size is such that relative movement is generated between the individual ice particles constituting the chunk and the ice particles can be separated into individual ice particles, and the transport amount of the ice particles is controlled by controlling the rotation speed of the rotating body. Even if the ice particles stick to each other in the ice particle storage unit and become clumps, the ice particle transport provided between the ice particle storage unit and the ice particle ejection unit is controlled. In the ice-grain separation passage in some parts, the clumps of ice that have stuck together are separated into individual ice Since letter in the state of ice particles blasting unit, without causing the ice particles clogging in the ice particles blasting unit or the like, it is possible to stably jet the ice particles. In addition, since the transport amount of the ice particles is controlled by controlling the rotation speed of the rotating body, controlling the rotation speed of the rotating body allows the ice particles including the clumps of ice particles fixed to each other to be removed. The ability to separate and transport the chunks into individual ice particles can be controlled.

[Brief description of the drawings]

FIG. 1 is an overall system diagram of an ice grain shot blasting apparatus to which the present invention is applied, and FIG. 2 is a schematic diagram of an ice grain storage section, an ice grain transport section, an ice grain jetting section and the like of the ice grain shot blasting apparatus. FIG. 3 is an enlarged view of the ice particle transport section, and FIG.
FIG. 5 is a cross-sectional view taken along the line IV-IV in FIG. 5, FIG. 5 is a schematic control diagram of the ice grain shot blasting machine, and FIG. 6 is an operation flowchart of the ice grain shot blasting machine. DESCRIPTION OF SYMBOLS 1 ... Ice machine, 2 ... Ice particle storage part 3 ... Ice particle conveyance part 4, ... Ice particle injection part 31 ... Separation roller, 34 ... Inclination guide 35 ... Ice particle separation passage, 200 ... Control device D: passage width

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-236472 (JP, A) JP-A-63-93566 (JP, A) JP-A-62-120978 (JP, A) JP-A 62-20978 140767 (JP, A) JP-A-59-1165 (JP, A) JP-A-62-139969 (JP, U) JP-A-1-87862 (JP, U) JP-A-60-109863 (JP, U) 62-144160 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B24C 1/00 B24C 7/00 B24C 3/00-3/04

Claims (1)

(57) [Claims] An ice particle storage unit for storing ice particles of a predetermined size, an ice particle ejection unit for injecting the ice particles toward a workpiece by a pressure fluid, and an ice particle storage unit for storing the ice particles. An ice grain shot blasting apparatus having an ice grain transport section for transporting ice grains to an ice grain ejecting section, wherein a part of the ice grain transport section is provided with an ice grain separating passage, and the ice grain separating passage is a passage. It is provided with two surfaces facing each other with a width, at least one of the two surfaces is constituted by an uneven surface moving in the direction of transport of the ice particles of the rotating body, and the passage width, When the fixed mass of ice particles passes through the ice particle separation passage, it generates a relative movement between the individual ice particles constituting the mass, and has a size capable of being separated into individual ice particles, The amount of ice particles transported is controlled by controlling the rotation speed of the rotating body. Ice particles shot blasting machine according to claim.