WO2012020517A1 - ブラスト加工装置 - Google Patents
ブラスト加工装置 Download PDFInfo
- Publication number
- WO2012020517A1 WO2012020517A1 PCT/JP2010/071358 JP2010071358W WO2012020517A1 WO 2012020517 A1 WO2012020517 A1 WO 2012020517A1 JP 2010071358 W JP2010071358 W JP 2010071358W WO 2012020517 A1 WO2012020517 A1 WO 2012020517A1
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- WO
- WIPO (PCT)
- Prior art keywords
- tumbler
- blasting
- nozzle
- nozzle assembly
- blasting apparatus
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
- B24C1/083—Deburring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C3/00—Abrasive blasting machines or devices; Plants
- B24C3/18—Abrasive blasting machines or devices; Plants essentially provided with means for moving workpieces into different working positions
- B24C3/26—Abrasive blasting machines or devices; Plants essentially provided with means for moving workpieces into different working positions the work being supported by barrel cages, i.e. tumblers; Gimbal mountings therefor
- B24C3/28—Apparatus using nozzles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
- B24C7/0046—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
- B24C9/006—Treatment of used abrasive material
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Definitions
- the present invention relates to a blasting apparatus for performing surface treatment of a plurality of workpieces.
- a so-called barrel polishing apparatus shown in Patent Document 1 and Patent Document 2 is used. Yes.
- Surface treatment by a barrel polishing apparatus is to put a workpiece and a cutting grinding medium (also simply referred to as “media”) into a rotating barrel of the apparatus and to make the workpiece and the medium inside the barrel flow.
- the surface of the workpiece is processed with.
- it is necessary to separate the workpiece and the medium after the polishing is completed which contributes to a longer processing time, that is, a production time.
- Patent Document 3 proposes a vibration-type blasting apparatus in which a workpiece is placed in a vibrating barrel, and the barrel is vibrated to stir the workpiece while injecting an injection material over the entire workpiece. ing.
- the vibration barrel since the vibration barrel must be installed in the processing chamber, there is a problem that the processing chamber is enlarged, and accordingly, the dust collector and the classifier for sucking the spray material and dust in the processing chamber are also enlarged. .
- Japanese Utility Model Publication No. 7-27744 (Ohara Corporation) Japanese Utility Model Publication No. 7-37560 (Chipton Co., Ltd.) JP 2008-194792 A (Sanpo Co., Ltd.)
- the present invention provides a blasting apparatus capable of efficiently performing surface processing of a plurality of workpieces that are small and capable of downsizing the entire apparatus including a classifier and a dust collector.
- a blasting chamber that surrounds a nozzle assembly for blasting by injecting an injection material toward a workpiece and forming a blasting region therein, Separating means for separating the reusable spray material from the mixture of the spray material sprayed from the nozzle assembly and the dust generated by blasting, the non-reusable spray material and the dust, Storage means for storing the propellant to be injected into the nozzle assembly; A collecting means for sucking and collecting the non-reusable spray material and the dust; With In the blasting chamber, at least one hollow tumbler adapted to be loaded with a workpiece and rotatable around a central axis is disposed.
- the tumbler has a bottom that is closed at one end, has an opening that is open at the other end facing the bottom, and has a plurality of through holes on a peripheral wall surface, and the opening.
- a blasting apparatus having a polygonal or circular cross section parallel to the portion is provided.
- the tumbler having a circular cross section parallel to the opening may be provided with a stirring promoting member on its inner wall.
- blasting devices a plurality of workpieces are put into a tumbler having a polygonal or circular cross section parallel to the opening, and the tumbler is rotated to stir the workpieces.
- the workpiece is exposed to the opening side facing the bottom of the tumbler. Accordingly, blasting can be performed on all workpieces by spraying the spray material from the opening through the nozzle assembly.
- the injection material injected toward the inside of the tumbler is discharged to the outside of the tumbler through a through hole provided in the wall surface.
- the blasting apparatus includes a tumbler holder for holding the tumbler, A rotating shaft for rotating the tumbler concentrically with its central axis, and a drive transmission tool for transmitting a driving force to the rotating shaft, respectively, disposed at the bottom of the tumbler holder; A rotating means having a rotating force generating means for generating a rotating force; Drive transmission means coupled to the drive transmission tool may be further provided so as to transmit the rotational force generated by the rotational force generation means to the drive transmission tool.
- two or more tumblers and two or more tumbler holders for holding the respective tumblers are provided, and the two or more tumbler holders rotate the two or more tumblers into the one rotation.
- You may comprise so that it may be rotated by a generation means.
- the amount that can be blasted at a time can be increased.
- the number of rotating means can be reduced, so that an increase in the size of the blasting apparatus due to an increase in the rotating means is suppressed. be able to.
- the tumbler is installed inclined at an angle range of 20 ° to 40 °, On the inner surface of the tumbler, a stirring promoting surface that promotes stirring of the workpiece by continuously decreasing the inner diameter of the tumbler toward the bottom near the bottom, and the opening on the opposite side of the bottom. It is preferable that at least any one of a leakage preventing surface for preventing leakage of the workpiece is provided by continuously decreasing the inner diameter toward the opening in the vicinity of the portion.
- the tumbler has a side wall portion that forms a continuous space having the same inner diameter, and an angle formed by at least one of the stirring promoting portion and the leakage preventing surface with respect to the side wall portion is 115 °. Is preferably in the range of 135 ° to 135 °.
- Rotating the tumbler while tilting it within an angle range of 20 ° to 40 ° enables efficient stirring of the workpiece in the tumbler. Furthermore, stirring can be performed more efficiently by providing the stirring promoting portion in which the inner diameter continuously decreases toward the bottom of the tumbler. In addition, by tilting the tumbler, when the workpiece leaks out of the tumbler during the rotation of the tumbler, the inner diameter continuously decreases toward the opening on the side opposite to the bottom. Leakage can be prevented by providing a leakage prevention surface.
- the nozzle assembly includes a nozzle holder having a path through which an injection material sucked by a negative pressure generated inside the nozzle assembly passes, a mixing chamber for mixing the injection material with compressed air, and compressed air to the nozzle assembly.
- An air nozzle for introducing into the nozzle holder and generating a negative pressure inside the nozzle holder; an injection nozzle for injecting the compressed air and the injection material mixed in the mixing chamber toward the workpiece; It is preferable that at least one of the connection part between the nozzle holder and the air nozzle and the connection part between the nozzle holder and the injection nozzle has a sealing member.
- a large-sized facility such as a facility (so-called direct pressure type) that supplies the injection material to the injection nozzle by introducing the injection material used in the prior art into the pressure tank and pressurizing the inside of the pressure tank.
- the accompanying equipment is unnecessary, and the entire apparatus can be downsized.
- the injection amount of the injection material is stabilized by providing a sealing member in at least one of the connection portion between the nozzle holder and the air nozzle and the connection portion between the nozzle holder and the injection nozzle. can do.
- the nozzle assembly is placed inside the blasting apparatus by nozzle assembly installation means for moving the nozzle assembly so that the propellant is introduced into the tumbler from the opening of the tumbler. It may be attached.
- ⁇ Tumblers can be replaced and added according to the shape and amount of work.
- the nozzle is attached by the nozzle assembly installation means for movably positioning the nozzle, so that the nozzle assembly can be easily adjusted without newly installing the nozzle assembly position adjusting mechanism.
- the position of the nozzle assembly can be adjusted.
- the tumbler can be easily replaced without removing the nozzle assembly by moving the position of the nozzle assembly by the nozzle assembly installation means.
- the bottom portion of the storage means is provided with an injection material injection means for supplying the injection material to the nozzle assembly, It is preferable that a discharge means for discharging the spray material is provided at the bottom of the storage means below the spray material charging means.
- the angle formed by the inclined surface of the storage means with respect to the horizontal direction is in the range of 73 ° to 87 °.
- the inclination angle of the bottom of the storage means is in the range of 73 ° to 87 °, it is possible to prevent the propellant from causing a blitching phenomenon (shelf suspending) inside the storage means. It can be taken out efficiently. Moreover, when replacing
- the collecting means has a discharge assisting tool for discharging the non-reusable spray material and dust collected by the collecting means from the inside of the collecting means.
- the discharge means with the collection means, the dust can be discharged to the outside of the collection means without requiring a complicated structure or process.
- An enclosure that defines the processing chamber, the tumbler, the rotating means, the injection nozzle, the separating means, the storing means, and the collecting means are one base that can be moved by a moving member. It is preferable that it is installed in.
- each component can be mounted on one base movable by a moving member, and a small and movable blasting apparatus can be formed.
- the workpiece to be blasted by the blasting apparatus of the present invention may be formed of a hard and brittle material.
- the blasting apparatus of the present invention is suitable for any of metal products such as cast products, forged products, and cut products as workpieces, and non-metallic products such as rubber and plastics. It is particularly suitable for blasting a workpiece formed of hard and brittle materials such as silicon and silicon.
- FIG. 5A is a side view of the tumbler
- FIG. 5B is a cross-sectional view taken along line AA in FIG. 5A
- FIG. 5C is a perspective view of the tumbler in FIG. 5A.
- FIG. 6A is a side view of the tumbler
- FIG. 6B is a view taken in the direction of arrow A in FIG. 6A
- FIG. 6C is a cross-sectional view taken along the line BB in FIG. 6A.
- FIG. 9A is an explanatory diagram showing an example of driving the nozzle assembly installation member
- FIG. 9B is an explanatory diagram showing an example of the configuration of the installation member. It is a side view which shows the classification apparatus in the blast processing apparatus of FIG. It is a side view which shows the storage device in the blast processing apparatus of FIG. It is explanatory drawing which shows the collection
- FIG. 13A is an external view showing a blasting device for opening and closing the door by mechanical power
- FIG. 13B is an external view showing a blasting device for opening and closing the door by human power.
- FIG. 1 shows a front view (right side of FIG. 1) and a left side view (left side of FIG. 1) of the blasting apparatus 1 of the present invention.
- the blasting apparatus 1 includes a blasting chamber 10 (shown in FIG. 2) having a door 10 a for loading and unloading a workpiece, and a recovery device (recovery means) 30. These are installed on a base 50 having a moving member, for example, a roller 51.
- a classifier (separating means) 20 connected to a reservoir (storage means) 21 for storing the injection material is connected to the blast processing chamber 10.
- a hollow tumbler 11 As shown in FIG. 2, in the blasting chamber 10, a hollow tumbler 11, a rotation mechanism (rotation means) 12, a nozzle assembly 13, and a nozzle assembly installation member (nozzle assembly installation means) 14 (see FIG. 9). Is shown).
- the number of tumblers 11 installed can be arbitrarily set according to the processing amount of the workpiece. In this embodiment, four tumblers 11 are installed.
- the tumbler 11 is a polygonal box-shaped body having an opening at the top or a cylindrical body with a bottom, and details will be described later.
- the tumbler 11 is inserted and held in the tumbler holder 11a.
- a bolt or the like may be used, and an engaging means such as a thread portion may be provided on both, and the method is not particularly limited.
- a convex hook (not shown) is formed on the tumbler holder 11a, and the outer wall of the tumbler 11 is engaged with the hook, so that the structure can be attached and detached with one touch.
- a rotation shaft 11b is provided at the center of the bottom surface of the tumbler holder 11a, and a first drive transmission tool 11c (FIG. 4) is attached to the rotation shaft 11b.
- a sprocket is used as the first drive transmission tool 11c.
- Rotating mechanism (rotating means) 12 includes a motor (rotation generating means) 12a and a base 12d.
- a motor rotation generating means
- base 12d In the present embodiment, as shown in FIG. 3, two bearings 12e are provided in the rotating mechanism (rotating means) 12 for each tumbler holder 11a, and the tumbler holder in which the tumbler 11 is held via the bearing 12e. 11 a is held by a rotating mechanism (rotating means) 12.
- only one motor 12a is used, and the motor 12a is also installed on the base 12d.
- a second drive transmission tool 12c is attached to the rotating shaft 12b of the motor (rotation generating means) 12a.
- the second drive transmission tool 12c needs to have a shape necessary for operating the first drive transmission tool 11c in synchronization.
- the first drive transmission tool 11c is a sprocket as in the present embodiment
- the second drive transmission tool 12c has a crest height and a gap between the crests. G
- the sprocket must be the same as 11c.
- the second drive transmission tool 12c has the same groove shape and groove depth as the pulley (first drive transmission tool) 11c. Need to be a pulley. Therefore, in the present embodiment, the second drive transmission tool 12c is a sprocket having the same height of the mountain and the distance between the peaks of the sprocket (first drive transmission tool) 11c.
- the second drive transmission tool 12c and all the first drive transmission tools 11c are coupled by the drive transmission member 12f so that the rotational force of the motor (drive transmission means) 12a is transmitted to all the tumblers 11.
- a chain is used as the drive transmission member 12f.
- the chain 12f rotates the pulley (second drive transmission tool) 12c of the rotary shaft 12b of the motor (rotation generating means) 12a.
- the force is coupled so as to be transmitted to the sprocket (first drive transmission tool) 11c of the rotating shaft 11b of the tumbler holder 11a (not shown in FIG. 4). Accordingly, all the tumbler holders 11a rotate in accordance with the rotation of the rotating shaft 12b of the motor (drive transmission means) 12a, and consequently all the tumblers 11 rotate.
- the tumbler 11 is substantially a hollow body, and has an opening 11d for feeding and discharging a workpiece and injecting an injection material toward the workpiece at the upper end, and the bottom end is closed. Yes.
- the wall surface forming the outer periphery of the tumbler 11 has a plurality of through holes 11i.
- the shape of the cross section of the tumbler 11 parallel to the opening 11d is preferably a polygonal shape or a circular shape.
- the inclination angle theta 1 of the agitation promoting surface 11h according to experiments, the effect when in the range of 135 ° from the 115 ° is remarkable. Further, the through hole 11i is provided so that the injection material does not stay inside the tumbler, and the diameter of the through hole 11i is such that the injection material can pass but the workpiece does not leak from the through hole.
- the stirring is performed more effectively by inclining and installing the tumbler 11.
- the inclination angle ⁇ of the tumbler 11 for that purpose is preferably in the range of 20 ° to 40 °, more preferably in the range of 27 ° to 32 °, according to experiments.
- the diameter (cross-sectional area) is continuously increased toward the opening 11d in the vicinity of the opening of the tumbler 11 so that the work piece does not leak out of the tumbler 11 during the blasting process by inclining the tumbler 11. It is preferable to provide a small leakage prevention surface 11f.
- the spray material cannot be sprayed onto the workpiece of the part.
- the angle ⁇ 2 formed between the leakage preventing surface 11f and the side wall surface of the tumbler 11 is determined according to experiments. A range of 115 ° to 135 ° is preferred.
- Tumbler 11 hollow and bottom used in this embodiment is closed, as shown in FIG. 6, the shape of the cross section parallel to the opening 11d is octagonal, the inclined angle theta 1 is at 118 ° 11 h of stirring promotion surfaces and the leakage prevention surface 11f whose said inclination-angle (theta) 2 is 132 degrees.
- the motor 12 in which the tumbler 11 is held via the tumbler holder 11a is arranged so that the inclination angle ⁇ of the tumbler 11 is 30 ° as described above.
- the nozzle assembly 13 includes a nozzle holder 13a, an air nozzle 13b, and an injection nozzle 13c.
- the nozzle holder 13a has an injection material input port 13d for supplying an injection material, and the inside of the nozzle holder 13a has a path 13e through which the injection material input from the input port 13d passes, and a mixing chamber 13f. In the mixing chamber 13f, the compressed air introduced through the air nozzle 13b and the spray material coming from the path 13e are mixed.
- Air nozzle 13b has a compressed air injection ports 13b o for injecting compressed air into one end, a cylindrical inner diameter toward the injection port 13b o becomes thinner.
- the proximal end of the nozzle holder 13a (inlet side of the compressed air) communicates with the compressed air supply source (not shown) via a hose (not shown) through the supply port 13b i of the air nozzle 13b.
- the compressed air introduced from the compressed air supply source is injected into the nozzle holder 13a.
- a negative pressure is generated inside the nozzle holder 13a.
- the propellant is sucked and introduced into the nozzle holder 13a from the propellant supply port 13d.
- the injection material introduced from the injection material supply port 13d passes through the injection material passage 13e, is guided to the mixing chamber 13f, and is mixed with the compressed air introduced into the nozzle holder 13a.
- the injection material supply port 13d is communicated with the reservoir 21 via the hose H as described later, and sucks the injection material stored in the reservoir 21 to be stored.
- Injection nozzle 13c is a hollow structure with both ends released, the cross-sectional area S 13Ci of the supply port 13c i side of the solid-gas two-phase flow of compressed air and the injection material is, on the opposite side of the solid-gas two-phase flow It is larger than the cross-sectional area S 13CO jets 13c o side.
- the cross-sectional shape of the supply port 13ci and the injection port 13co may be either a circle or a polygon including a rectangle. In the present embodiment, the cross-sectional shapes of the supply port 13ci and the injection port 13co are circular.
- Air nozzle 13c as the longitudinal center line of the air nozzle 13c is positioned on the center line approximately the same line connecting the center points of the supply port 13c i and the injection port 13c o of the injection nozzle 13c, and the mixing chamber 13f and the supply port 13c i is provided so as to communicate.
- the solid-gas two-phase flow generated in the mixing chamber 13f is passed through the inside of the supply port 13c i from the ejection nozzle 13c, is injected from the injection port 13c o.
- a sealing member 13g is provided on at least one of the connecting portion between the nozzle holder 13a and the air nozzle 13b and the connecting portion between the nozzle holder 13a and the injection nozzle 13c, more preferably both. Is desirable. When the compressed air introduced into the nozzle holder 13a leaks from the gap between the connecting portions, the negative pressure generated inside the nozzle holder 13 is reduced and the suction force of the injection material is reduced. It can suppress by providing.
- grooves are provided on the outer circumferences of the air nozzle 13b and the injection nozzle 13c, and an O-ring is fitted as a sealing member 13g in the grooves.
- nozzle assemblies 13 are installed.
- the nozzle assembly 13 is attached to the blasting chamber 10 by a nozzle assembly installation member 14 shown in FIG. Since the tumbler 11 of the present embodiment is inclined and has the leakage prevention surface 11f, it is necessary to attach the nozzle assembly 13 according to this configuration.
- the installation member 14 is formed by an arm having at least one or more movable members from the attachment location in the blasting chamber to the nozzle installation portion. For example, in FIG. 9A, the nozzle assembly 13 is moved up and down with respect to the tumbler 11 by forming a rotatable nozzle assembly installation member 14 by engaging a plurality of prismatic members and a plurality of cylindrical members.
- the place where the nozzle assembly installation member 14 is installed in the blasting chamber 10 is not particularly limited, but in this embodiment, the nozzle assembly installation member 14 is arranged on the base 12 (FIG. 2). Specifically, as shown in FIG. 9B, the first, second, third, and fourth arms 14a, 14b, 14c with respect to the base 12 (not shown in FIG. 9B). , And 14d are sequentially engaged with each other as follows.
- Base 12 Cylindrical members are provided at positions corresponding to the installation of the respective nozzle assemblies 13.
- First arm 14a formed of a prismatic member, and has a first hole having the same diameter as that of the cylindrical member in the longitudinal direction (perpendicular to the paper surface of FIG.
- the column member of the base 12 is inserted.
- a second hole having the same diameter as that of the second arm 14b is provided in the height direction (the vertical direction of the drawing).
- 2nd arm 14b It is formed with the cylindrical member, The lower end is inserted in the 2nd hole of the 1st arm 14a, and is engaged.
- Third arm 14c It is formed of a prism member, and has a hole having the same diameter as that of the second arm 14b in the height direction at one end thereof (the right side in FIG. 9B). The upper end of the arm 14b is inserted and engaged. Further, a cylindrical member protruding upward is provided at the other end.
- Fourth arm 14d It is formed of a prismatic member, and has a hole having the same diameter as that of the columnar member of the third arm 14c in the height direction at one end (right side of FIG. 9B). Is engaged with the upper end of the columnar member of the third arm 14c. A holding tool (not shown) for holding the nozzle assembly 13 is provided near the other end.
- the holder of the nozzle assembly 13 is not particularly limited.
- the fourth arm 14d may be fixed with a bolt or the like, or may be held by a clamp mechanism. Moreover, you may improve the freedom degree of installation of this nozzle assembly 13 by comprising this holder itself rotatably.
- the blasting apparatus in the present embodiment has a structure in which the installation member 14 of the nozzle assembly 13 moves in conjunction with opening and closing of the door 10a. That is, the nozzle assembly 13 moves so that the tumbler 11 can be easily attached and detached when the door 10a is opened, and the spray material can be injected into the tumbler 11 when the door 10a is closed. did.
- the classification device 20 has a first cylindrical body 20a whose upper surface is closed by a ceiling having a suction member 20c, has a continuous cross-sectional area, and has an input member 20d on a side surface, and a diameter continuously from the upper side to the lower side.
- the second cylindrical body 20b having a small (cross-sectional area) is connected to be configured.
- a reservoir 21 is connected to the lower surface of the classifier 20.
- the input member 20d is connected to the blasting chamber 10 through a duct D 1 (FIG. 1).
- the suction member 20c is connected to the recovery device 30 via a duct D 2 (FIG. 1). That is, the space in the blast processing chamber 10, the space in the classification device 20, the space in the reservoir 21, and the collection device 30 form a continuous space.
- the reservoir 21 for storing the reusable injection material taken out by the classifier 20 has a third diameter having a continuous diameter (cross-sectional area) that is the same as the bottom of the classifier 20.
- the cylindrical body 21a is connected to a fourth cylindrical body 21b whose diameter (cross-sectional area) continuously decreases downward.
- the diameter (cross-sectional area) continuously decreases not only the diameter (cross-sectional area) decreases uniformly downward, but also the reduction rate of the diameter (cross-sectional area) may vary stepwise.
- the sidewalls of the fourth cylindrical body 21b is set such that the angle theta 3 which makes with the horizontal plane is in the range of 87 ° from 73 °.
- this angle is smaller than 73 °, a phenomenon that the propellant inside the reservoir 21 cannot take out the propellant due to a blitching phenomenon (shelf hanging) tends to occur.
- the angle is large.
- a discharge assisting tool 21d described later is enlarged. Therefore, in order to efficiently take out the injection material from the reservoir 21 and to reduce the discharge assisting tool 21d, it is preferable to set the angle ⁇ 3 in the range of 73 ° to 87 °.
- An injection material takeout tool 21 c for supplying the injection material stored in the reservoir 21 to the nozzle assembly 13 is installed near the lowermost surface.
- the injection material take-out tool 21c is connected to the injection material inlet 13d of the nozzle assembly 13 via the hose H (FIG. 2).
- a discharge assisting tool 21d is provided on the lowermost surface of the fourth cylindrical body 21b.
- a butterfly valve is used in this embodiment, but a ball valve or a gate valve may be used instead.
- the cylindrical bodies 21a and 21b of the reservoir 21 may be cylindrical bodies or cylindrical bodies having a polygonal cross section. In the present embodiment, a cylindrical body having a rectangular cross section is used.
- the recovery device 20 and the reservoir 21 are installed so that at least the injection material takeout tool 21c of the storage device 21 is disposed in the blast processing chamber 10, but the injection material is supplied to the nozzle assembly 13. If there is no inconvenience, the installation location is not particularly limited.
- the collection device 30 for collecting the dust used a dust collector including a filter cloth for separating solid (dust) and gas from a solid-gas two-phase flow.
- a pulse jet method in which compressed air is intermittently blown onto the filter cloth was used.
- the method is not particularly limited, and for example, a mechanical method of removing by mechanical means may be used.
- the collection device 30 is provided with a discharge tool 31 for discharging dust that has been wiped off from the filter cloth and stored at the bottom of the collection device 30 to the outside of the collection device 30. ing.
- the discharge tool 31 uses a ball valve.
- a gate valve or a rotary valve may be used.
- the blasting apparatus of this embodiment Next, blasting by the blasting apparatus of this embodiment will be described.
- a process for roughening a 0.8 ⁇ 1.6 mm ceramic member as a workpiece will be described.
- the term “small workpiece” refers to a workpiece having a diameter or side of approximately 30 mm or less, particularly for a workpiece having a diameter or side of approximately 2 mm or less.
- the blasting apparatus of the invention can be suitably used.
- the door 10a of the blasting chamber 10 is opened, the four tumblers 11 are taken out from the blasting chamber 10, and approximately the same amount of workpiece is put into each tumbler 11. Thereafter, the tumbler 11 is again engaged with the tumbler holder 11 a and set in the blasting chamber 10. Further, a required amount of the injection material (in this embodiment, zirconia) is put into the blasting chamber 10 and the door 10a is closed.
- the door 10a may be opened and closed manually, but may be performed by a mechanical operation such as an air cylinder.
- the spray material is transferred into the classification device 20 by the suction force generated by the recovery device 30, and then stored in the reservoir 21.
- the four tumblers 11 rotate by operating the motor 12a.
- the workpiece in the tumbler 11 is agitated by this rotation.
- the compressed air generation source is operated, and negative pressure is generated inside the nozzle assembly 13 by, for example, injecting compressed air having a pressure of 0.7 MPa from the air nozzle 13b. Abrasives This negative pressure is supplied to the nozzle assembly 13, it is injected together with the compressed air from the injection port 13c o. Blasting is performed by the jetted spray material colliding with the surface of the workpiece. Further, since the workpiece is agitated by the rotation of the tumbler 11, all the workpieces are sequentially exposed to the spray material, and all the workpieces can be blasted.
- the dust transferred to the collection device 30 accumulates on the surface of the filter cloth inside the collection device 30. Dust accumulated on the surface of the filter cloth is removed by a pulse jet and stored at the bottom. The stored dust is discharged to the outside of the collection device 30 by opening the discharge tool 31.
- the compressed air supply source stops moving. At that time, the rotation of the motor 12a is still continued. This is because the spray material remaining in the tumbler 11 is discharged to the outside through the through hole 11i on the wall surface. Similarly, the movement of the recovery device 30 continues. This is because the inside of the blasting chamber 10 is filled with the spray material and dust, so that the spray material is stored (collected) in the reservoir 21 via the classifier 20 or the dust is recovered by the recovery device 30. Because.
- the discharge auxiliary tool 21d is opened.
- the propellant can be easily taken out.
- the nozzle assembly installation member 14 can be driven to easily adjust the position of the nozzle assembly 13.
- FIG. 13A shows a blasting device that opens and closes the door 10a by mechanical power (in this case, an air cylinder), and FIG. 13B shows a blasting device that opens and closes the door 10a by human power (manually).
- mechanical power in this case, an air cylinder
- FIG. 13B shows a blasting device that opens and closes the door 10a by human power (manually).
- the nozzle assembly 13 may use a so-called direct pressure type as long as a space for installing auxiliary equipment such as a pressurized tank can be secured.
- the tumbler holder 11a is used to rotate and hold the tumbler 11.
- an embodiment using the tumbler 11 having the drive shaft at the bottom by omitting the tumbler holder 11a can be configured. Please note that.
- the spray material is generally a blasting jet, such as a cut wire, ceramics, resin, plant, etc. that cuts iron or iron-based shots or grit or thin wires (or rounds the corners after cutting). Any material that can be used as a material can be preferably used.
- the blasting process for the workpiece formed from the hard and brittle material has been described.
- the blasting apparatus of the present invention is capable of blasting in general regardless of whether the workpiece is a metal material or a non-metal material. Can be applied to.
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Abstract
Description
前記ノズル・アセンブリから噴射された噴射材とブラスト加工により発生した粉塵との混合体から再使用可能な噴射材と、再使用できない噴射材および前記粉塵と、を分離する分離手段と、
前記ノズル・アセンブリに投入する噴射材を貯留するための貯留手段と、
前記再使用できない噴射材および前記粉塵を吸引して回収するための回収手段と、
を備え、
前記ブラスト加工室内には、被加工物が投入されるように適合されて、かつ中心軸周りに回転可能な中空のタンブラが少なくとも一つ以上配置されており、
前記タンブラは、その一端が閉止されている底部をなし、前記底部と対向する他端が開放されている開口部を有し、周壁面には複数の貫通穴が設けられていると共に、前記開口部に平行な断面が多角形状又は円形状であるブラスト加工装置が提供される。
前記タンブラホルダの底部にそれぞれ配置され、前記タンブラをその中心軸と同心をなして回転させるための回転軸およびこの回転軸へ駆動力を伝達するための駆動伝達具と、
回転力を発生する回転力発生手段を有する回転手段と、
前記回転力発生手段の発生する回転力を前記駆動伝達具へ伝達するように、前記駆動伝達具に連結された駆動伝達手段とを更に備えてもよい。
前記タンブラの内面には、前記底部付近において前記底部に向かって前記タンブラの内径を連続的に減少させることにより、被加工物の攪拌を促進させる攪拌促進面と、前記底部の反対側の前記開口部付近において前記開口部に向かって前記内径を連続的に減少させることにより、被加工物の漏出を防止する漏出防止面とのうちの少なくとも何れか一方が設けられていることが好ましい。
該噴射材投入手段より下方における前記貯留手段の前記底部には、前記噴射材を排出するための排出手段が設けられていることが好ましい。
また、被加工物および加工目的に応じて噴射材を交換する場合、前記排出手段より内部の噴射材を排出することができる。
或いは第1の駆動伝達具11cとしてプーリ(図示せず)を用いる場合、第2の駆動伝達具12cはプーリ(第1の駆動伝達具)11cの溝の形状および溝の深さが同じであるプーリとする必要がある。
そこで、本実施形態では、第2の駆動伝達具12cはスプロケット(第1の駆動伝達具)11cの山の高さおよび山と山との間隔が同じであるスプロケットを使用した。
本実施形態では、駆動伝達部材12fとしてチェーンを使用し、図4に示すように、このチェーン12fがモータ(回転発生手段)12aの回転軸12bのプーリ(第2の駆動伝達具)12cの回転力を、タンブラホルダ11a(図4には図示せず)の回転軸11bのスプロケット(第1の駆動伝達具)11cへ伝達するように連結している。従ってモータ(駆動伝達手段)12aの回転軸12bの回転に合わせて全てのタンブラホルダ11aが回転し、ひいては全てのタンブラ11が回転する。
さらに、タンブラ11の前記開口部11dに平行な断面形状に依らず、タンブラ11の底部に被加工物が滞留するのを防ぐために、タンブラ11の底部付近に底部に向かってタンブラ11の内径(断面積)が連続的に小さくなる攪拌促進面11hを設けることが好ましい。この攪拌促進面11hの傾斜角度θ1は、実験によれば、115°から135°の範囲であると効果が顕著である。また、貫通穴11iは、タンブラ内部に噴射材が滞留しないように設けてあり、その径は噴射材は通過できるが、被加工物が該貫通穴より漏出しない程度の大きさである。
例えば、図9(A)では複数の角柱部材と複数の円柱部材とを係合させて回動自在なノズル・アセンブリ設置部材14を形成することで、ノズル・アセンブリ13をタンブラ11に対して上下左右方向に自由な位置に設定することができる。ノズル・アセンブリ設置部材14をブラスト加工室10内に設置する場所は特に限定されないが、本実施形態では、ベース12(図2)に配置した。具体的には、図9(B)に示すようにベース12(図9(B)には図示せず)に対して第1,第2、第3,および第4のアーム14a,14b,14c,および14dを順次に係合させるノズル・アセンブリ設置部材14のそれぞれの部品の構成は下記の通りである。
ベース12 :それぞれのノズル・アセンブリ13の設置に対応する位置に円柱部材を設けている。
第1のアーム14a:角柱部材で形成されており、長手方向(図9(B)の紙面の垂直方向)に前記円柱部材と同径の第1の穴を有し、この第1の穴にはベース12の円柱部材が嵌入されている。また、高さ方向(紙面の上下方向)には第2のアーム14bと同径の第2の穴を有する。
第2のアーム14b:円柱部材で形成されており、その下端が第1のアーム14aの第2の穴に嵌入されて係合する。
第3のアーム14c:角柱部材で形成されており、その一端(図9(B)の右側)の高さ方向に第2のアーム14bと同径の穴を有し、この穴には第2のアーム14bの上端が嵌入されて係合する。また、他端には上方へ突出する円柱部材が設けられている。
第4のアーム14d:角柱部材で形成されており、その一端(図9(B)の右側)の高さ方向に第3のアーム14cの円柱部材と同径の穴を有し、この穴には第3のアーム14cの円柱部材の上端が嵌入されて係合する。また、他端付近にはノズル・アセンブリ13を保持する保持具(図示せず)を有する。
ここで、ノズル・アセンブリ13の保持具は特に限定されない。例えば、第4のアーム14dにボルト等で固定しもよく、クランプ機構によって保持してもよい。また、該保持具自体を回転可能に構成することで、該ノズル・アセンブリ13の設置の自由度を向上させてもよい。
また、回収時に濾布上に堆積したダストの除去(払い落とす)方式としては、圧縮空気を間欠的に濾布に吹き付けるパルスジェット方式を使用した。しかし、その方式は特に限定されるものではなく、例えば機械的手段によって払い落とす機械方式を用いてもよい。
図12に示すように、回収装置30には、濾布上から払い落とされて、回収装置30の底部に貯留されたダストを回収装置30の外部に排出するために、排出具31が設けられている。この排出具31は、本実施形態ではボールバルブを用いたが、これに代えて、例えばゲートバルブやロータリーバルブ等を用いてもよい。
次に、本実施形態のブラスト加工装置によるブラスト加工について説明する。本実施例では、被加工物として0.8×1.6mmのセラミックス系部材を粗面化するための加工について説明する。なお、本明細書において「小型の被加工物」とは、径または辺が概ね30mm以下程度の大きさの被加工物を称し、特に径または辺が2mm以下程度の被加工物に対して本発明のブラスト加工装置を好適にもちいることができる。
10 ブラスト加工室
10a 扉
11 タンブラ
11a タンブラホルダ
11b 回転軸
11c 第1の駆動伝達具(スプロケット)
11d 開口部
11e 攪拌促進部材
11f 漏出防止面
11g 側壁面
11h 攪拌促進面
11i 貫通穴
12 回転機構(回転手段)
12a モータ(回転発生手段)
12b 回転軸
12c 第2の駆動伝達具(スプロケット)
12d ベース
12e 軸受け
12f 駆動伝達手段(チェーン)
13 ノズル・アセンブリ
13a ノズルホルダ
13b 空気ノズル
13bi 空気ノズルの圧縮空気供給口
13bo 空気ノズルの圧縮空気噴射口
13c 噴射ノズル
13ci 固気二相流の供給口
13co 固気二相流の噴射口
13d 噴射材投入口
13e 噴射材通過経路
13f 混合室
13g 密封手段
14 ノズル・アセンブリ設置部材(ノズル・アセンブリ設置手段)
14a 第1のアーム
14b 第2のアーム
14c 第3のアーム
14d 第4のアーム
20 分級装置(分離手段)
20a 第1の筒状体
20b 第2の筒状体
20c 吸引部材
20d 投入部材
21 貯留器
21a 第3の筒状体
21b 第4の筒状体
21c 噴射材取り出し
21d 排出補助具
30 回収装置(回収手段)
31 排出口
50 基台
51 移動部材
H ホース
D1 分級装置用ダクト
D2 回収装置用ダクト
Claims (13)
- 被加工物に向けて噴射材を噴射してブラスト加工をするためのノズル・アセンブリを囲いかつ内部にブラスト加工領域を形成するブラスト加工室と、
前記ノズル・アセンブリから噴射された噴射材とブラスト加工により発生した粉塵との混合体から再使用可能な噴射材と、再使用できない噴射材および粉塵と、を分離する分離手段と、
前記ノズル・アセンブリに投入する噴射材を貯留するための貯留手段と、
前記再使用できない噴射材および粉塵と、を吸引して回収するための回収手段と、
を備えたブラスト加工装置において、
前記ブラスト加工室内には、被加工物が投入されるように適合されて、かつ中心軸周りに回転可能な中空のタンブラが少なくとも一つ以上配置されており、
前記タンブラは、その一端が閉止されている底部をなし、前記底部と対向する他端が開放されている開口部を有し、周壁面には複数の貫通穴が設けられていると共に、前記開口部に平行な断面が多角形状又は円形状であることを特徴とするブラスト加工装置。 - 前記タンブラは、前記開口部に平行な断面が円形状であると共に、内壁に攪拌促進部材が設けられていることを特徴とする請求項1に記載のブラスト加工装置。
- 前記タンブラを保持するタンブラホルダと、
前記タンブラホルダの底部にそれぞれ配置され、前記タンブラをその中心軸と同心をなして回転させるための回転軸およびこの回転軸へ駆動力を伝達するための駆動伝達具と、
回転力を発生する回転力発生手段を有する回転手段と、
前記回転力発生手段の発生する回転力を前記駆動伝達具へ伝達するように、前記駆動伝達具に連結された駆動伝達手段とを更に備えることを特徴とする請求項1または請求項2に記載のブラスト加工装置。 - 二つ以上の前記タンブラと、その各々のタンブラをそれぞれ保持する二つ以上の前記タンブラホルダとを備え、前記二つ以上のタンブラホルダは、前記二つ以上のタンブラを一つの前記回転発生手段により回転させるように構成されていることを特徴とする請求項3に記載のブラスト加工装置。
- 前記タンブラは20°から40°の範囲の角度で傾けて設置されていると共に、
前記タンブラの内面には、前記底部付近において前記底部に向かって前記タンブラの内径を連続的に減少させることにより、被加工物の攪拌を促進させる攪拌促進面と、前記底部の反対側の前記開口部付近において前記開口部に向かって前記内径を連続的に減少させることにより、被加工物の漏出を防止する漏出防止面とのうちの少なくとも何れか一方が設けられていることを特徴とする請求項1または2に記載のブラスト加工装置。 - 前記タンブラは内径が同一の連続した空間を構成する側壁部を有し、この側壁部に対して、前記攪拌促進面と前記漏出防止面とのうちの少なくとも一方が成す角度は115°から135°の範囲であることを特徴とする請求項5に記載のブラスト加工装置。
- 前記ノズル・アセンブリは、前記ノズル・アセンブリの内部で発生した負圧により吸引された噴射材が通過する経路と、圧縮空気に噴射材を混合する混合室とを有するノズルホルダと、
圧縮空気を前記ノズルホルダ内部に導入し、前記ノズルホルダ内部に負圧を発生させるための空気ノズルと、
前記混合室で混合された圧縮空気と噴射材を被加工物に向かって噴射するための噴射ノズルと、を備え、
前記ノズルホルダと前記空気ノズルとの間の接続部と、前記ノズルホルダと前記噴射ノズルとの間の接続部とのうちの少なくとも一方は密封部材を有していることを特徴とする請求項1または2に記載のブラスト加工装置。 - 前記ノズル・アセンブリは、前記タンブラの開口部より、その内部に向けて噴射剤が投入されるように、このノズル・アセンブリを位置決め自在に移動させるノズル・アセンブリ設置手段によって前記ブラスト加工装置の内部に取り付けられていることを特徴とする請求項1または2に記載のブラスト加工装置。
- 前記貯留手段は、その底部に向かって内径が減少する傾斜面を有し、
前記貯留手段の前記底部には、前記噴射材を前記ノズル・アセンブリへ投入するための噴射材投入手段が設けられていると共に、
該噴射材投入手段より下方における前記貯留手段の前記底部には、前記噴射材を排出するための排出手段が設けられていることを特徴とする請求項1または2に記載のブラスト加工装置。 - 前記貯留手段の前記傾斜面が水平方向に対して成す角度が73°から87°の範囲であることを特徴とする請求項9に記載のブラスト加工装置。
- 前記回収手段は、該回収手段によって回収された前記再利用できない噴射材および前記粉塵を該回収手段内部から排出するための排出補助具を有することを特徴とする請求項1または2に記載のブラスト加工装置。
- 前記ノズル・アセンブリおよび前記タンブラが内部に配置された前記加工室と、前記タンブラと、前記回転手段と、前記分離手段と、前記貯留手段と、前記回収手段とが、移動部材により移動可能な一つの基台に設置されていることを特徴とする請求項1または2に記載のブラスト加工装置。
- 前記被加工物は、硬脆材料により形成されていることを特徴とする請求項1または2に記載のブラスト加工装置。
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- 2010-11-30 KR KR1020117021497A patent/KR20130037140A/ko active Search and Examination
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Also Published As
Publication number | Publication date |
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KR20160031050A (ko) | 2016-03-21 |
KR20130037140A (ko) | 2013-04-15 |
JP5569529B2 (ja) | 2014-08-13 |
TWI522208B (zh) | 2016-02-21 |
CN102548712B (zh) | 2015-11-25 |
CN102548712A (zh) | 2012-07-04 |
JPWO2012020517A1 (ja) | 2013-10-28 |
TW201206639A (en) | 2012-02-16 |
KR101718442B1 (ko) | 2017-03-21 |
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