JPH0994764A - Blast machining device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain uniform blow-out density as much as possible and to suppress abrasive consumption maximally by arranging a plurality of ring type abrasive grain collecting means in parallel along the extension direction of a rotary shaft and arranging an abrasive grain inlet in an abrasive blow-out means opposedly to an abrasive grain collecting part in a feeding rotational body. SOLUTION: In blast machining of metal and the like, air pressurized by means of a pressurizing pump is fed to an abrasive grain feeding space 3 and an abrasive grain storage space 12a in an abrasive grain feeding means 11. When a feeding rotational body 9 is driven in the arrow A direction, the lower side of the feeding rotational body 9 is rotated in accumulated beads TR, and the beads TR are scraped and collected by means of respective abrasive grain collecting ditches 9 formed in the circumference direction so as to be brought to an abrasive jetting position TR sequently while covered by an abrasive grain scatter preventing cover l0. In this process, the beads TR are blown out with air to the outside via an abrasive grain discharging pipe 25 and a jetting nozzle 25a if an open/close valve 25b is kept open, and as a result, blast machining to a workpiece is carried out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is suitable for blasting in which powdery fine abrasive grains are accelerated by high pressure air and blown out from a nozzle or the like, and the kinetic energy of the abrasive grains blown off is used to process an article. Blast processing machine.

[0002]

2. Description of the Related Art Conventionally, blasting has been performed in which powdery fine abrasive grains are accelerated by high pressure air and blown out from a nozzle to process an article by the kinetic energy of the abrasive grains blown out. Various blasting machines are used.

[0003]

By the way, in order to carry out more precise and accurate blasting, it is necessary to keep the blowing density of abrasive grains as uniform as possible. However, in the conventional blasting machine, it was difficult to eliminate unevenness in the blowing density of the abrasive grains as much as possible and to keep the blowing density of the abrasive grains as uniform as possible. Therefore, in the conventional blasting machine,
In terms of processing, in order to maintain the minimum blowing density, it is necessary to constantly blow out 1.5 times or more of the required density of abrasive grains, and a large amount of abrasive grains are wasted.

Therefore, in view of the above circumstances, the present invention has an object to provide a blasting machine capable of keeping the blowing density as uniform as possible and saving the consumption of abrasive grains as much as possible.

[0005]

The first invention of the present invention has a casing (2) in which an abrasive grain feeding space (3) is formed, and feeds to the abrasive grain feeding space (3). The rotating body (9, 65) is provided so as to be rotatable about the predetermined rotation axis (Q1) with respect to the casing (2), and the outer peripheral portion (9d, 65a) of the delivery rotating body (9, 65) is provided. ), An annular abrasive grain collecting means (41, 67) is attached to the rotary shaft (Q
1) are provided in parallel along the extending direction of 1), and each of the abrasive grain collecting means (41, 67) is provided with the delivery rotating body (9, 6).
5) A plurality of abrasive grain collecting portions (9c, 66) capable of capturing abrasive grains (TR) formed at the same installation pitch (SP) over the entire circumference of the outer peripheral portion (9d, 65a). In the abrasive grain collecting means (41, 67), the arrangement phase of the abrasive grain collecting portions (9c, 66) is different between the adjacent abrasive grain collecting means (41, 41, 67, 67). The delivery rotating body (9, 65), which is arranged in a deviated form, is provided with a rotation driving means (7) capable of rotationally driving the delivery rotating body (9, 65) around the rotation axis (Q1). The casing (2) is provided with an abrasive grain supply means (11), and the abrasive grain delivery space (3) is provided with an abrasive grain (TR) so as to be freely supplied to the casing (2). (50) is provided in such a manner that pressurized air can be supplied to the abrasive grain delivery space (3), and is provided in the casing (2). Grain blowing means (51),
The abrasive grain inlet (52) of the abrasive grain blowing means (51) is made to face the abrasive grain collecting portion (9c, 66) of the delivery rotary body (9, 65), and the abrasive grain delivery space ( It is provided so as to open above the abrasive grain storage level (TL) of 3).

A second aspect of the present invention is the blasting machine (1) according to the first aspect, wherein the delivery rotating body (9, 65) is formed in a disk shape, and the abrasive grains are collected. The portion (9c, 66) is an abrasive grain collecting recess (9c, 66) formed on the outer peripheral portion (9d, 65a) of the delivery rotating body (9, 65) and capable of collecting abrasive grains (TR). Is.

A third aspect of the present invention is the blasting machine (1) according to the second aspect, wherein the feed rotary body (65) has three or more plate bodies (9a, 9a) arranged in parallel.
9a, 40) and these adjacent disc bodies (9a, 9a,
40) consisting of groove-forming disks (9b) sandwiched one by one, and a plurality of abrasive grain collecting grooves (9e) are provided on the outer peripheral portion (9d) of each groove-forming disk (9b). The abrasive grain collecting recess (9c) is formed adjacent to the abrasive grain collecting groove (9e) of each groove forming disc (9b) and the groove forming disc (9b).
The two disc bodies (9a, 9a, 40) are formed.

A fourth aspect of the present invention is the blasting machine (1) according to the first aspect, wherein the abrasive grain inlet (52) of the abrasive grain blowing means (51) is connected to the plurality of abrasive grains. The collecting means (41, 67) was arranged at the central position (CA) in the extending direction of the rotating shaft (Q1).

The numbers and the like in parentheses indicate the corresponding elements in the drawings for convenience, and therefore, the present description is not limited to the description on the drawings. The same applies to the following “action” column.

[0010]

According to the first aspect of the present invention having the above-mentioned structure, each abrasive grain collecting means is provided every time the delivery rotor (9, 65) rotates by the installation pitch (SP), that is, at equal time intervals. Each of the abrasive grain collecting parts (9c, 66) of (41, 67) is moved to a position facing the abrasive grain intake (52) of the abrasive grain blowing means (51), and each abrasive grain collecting part (9). The abrasive grains (TR) collected in 9c, 66) flow into the abrasive grain blowing means (51). By the way, one abrasive grain collecting means (41, 67)
Each of the abrasive grain collecting parts (9c, 66) of the
Every time 5) is rotated by the installation pitch (SP), it can be sequentially moved to a position facing the abrasive grain inlet (52) of the abrasive grain blowing means (51), but the adjacent abrasive grain collecting means ( Four
1, 41, 67, 67), the abrasive grain collecting section (9
Since the arrangement phase of (c, 66) is shifted, the abrasive grain collecting section (9c, 66) of one abrasive grain collecting means (41, 67) is
After being moved to a position facing the abrasive grain intake (52), the delivery rotary body (9, 65) is moved to the installation pitch (SP).
By rotating an angle smaller than that, that is, an angle corresponding to the shift of the arrangement phase, another adjacent abrasive grain collecting means (4
The abrasive grain collecting section (9c, 66) of No. 1, 67) is moved to a position facing the abrasive grain intake (52).

In the second aspect of the present invention, when the delivery rotating body (9, 65) rotates in the abrasive delivery space (3), the abrasive (TR) in the abrasive delivery space (3) is rotated. And the frictional resistance between the outer peripheral portion (9d, 65a) of the delivery rotating body (9, 65) is small.

According to a third aspect of the present invention, the groove forming disk (9b) has a milling cutter having a plurality of blade grooves (9e) formed on the outer peripheral portion (9d) and a tooth on the outer peripheral portion (9d). A member such as a gear having a plurality of grooves is adopted.

In the fourth aspect of the present invention, an abrasive grain collecting section (9c, 66) moved to a position facing the abrasive grain inlet (52) of the abrasive grain blowing means (51), The distance to the abrasive grain inlet (52) is determined by the plurality of abrasive grain collecting means (4
There is no difference as much as possible between 1 and 67).

[0014]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a side sectional view showing an example of a blasting machine according to the present invention, FIG. 2 is a longitudinal sectional view taken along line X1-Y1 of FIG. 1, and FIG. 3 is a plane sectional view taken along line X2-Y2 of FIG. , Fig. 4
FIG. 5 is a perspective view showing the vicinity of the delivery rotary body, and FIG. 5 is a perspective view showing the vicinity of the delivery rotary body in another example of the blasting machine according to the present invention.

As shown in FIGS. 1 and 2, the blasting machine 1 according to the present invention has a casing 2 installed in an unillustrated work place through an appropriate installation member (not shown), and inside the casing 2. An abrasive grain delivery space 3 and a drive device storage space 5 are formed. In the abrasive grain delivery space 3, beads TR (that is, glass beads or powdery fine abrasive grains), which are abrasive grains, can be stored up to a predetermined abrasive grain storage level TL indicated by a two-dot chain line in FIG. A vertical plate-shaped partition member 6 is provided between the abrasive grain delivery space 3 and the drive device storage space 5 so as to separate the two. In the casing 2, as shown in FIG.
(Note that in FIG. 2, the rotation driving means 7 and a delivery rotating body 9 described later
The side surface is shown), and the rotary drive means 7 has an electric motor unit 7b housed and installed in the drive device housing space 5. The motor unit 7 is provided with a drive shaft member 7a extending in the substantially horizontal directions shown by arrows B and C in FIG. 2 (that is, the left-right direction on the paper surface of FIG. 2). The drive shaft member 7a can be driven to rotate about a predetermined rotation shaft Q1 extending in the directions of arrows B and C in the direction of arrow A in the drawing. The rotary shaft Q1 is fixedly set and arranged with respect to the casing 2. Further, the drive shaft member 7a is arranged so as to penetrate the partition member 6 in the directions of the arrows B and C. Therefore, the tip end side of the drive shaft member 7a,
That is, the arrow B side is located in the abrasive grain delivery space 3 (note that a known oil seal or the like is provided between the drive shaft member 7a and the partition member 6 to provide the drive shaft member 7a and the partition member). It is as airtight as possible between 6). Drive shaft member 7a
As shown in FIGS. 1, 2 and 4, a delivery rotating body 9 basically formed in a disk shape is provided on the tip side of the drive shaft member 7a.
Therefore, the delivery rotary body 9 can be rotationally driven by the motor unit 7 in the direction of arrow A in the figure via the drive shaft member 7a. Since the delivery rotary body 9 and the drive shaft member 7a are concentrically connected to each other, the rotation center Q2 of the delivery rotary body 9 is
Coincides with the rotation axis Q1 of the drive shaft member 7a, and the rotation center Q2 is located below the abrasive grain storage level TL. Further, the delivery rotating body 9 is arranged so that the top end position of the delivery rotating body 9 is always located above the abrasive grain storage level TL. In other words, the delivery rotating body 9 is provided in the abrasive grain delivery space 3 with respect to the casing 2 and the rotation axis Q.
1 is provided so as to be rotatable around the center, and the delivery rotating body 9 is provided with a rotation driving means 7 capable of rotating the delivery rotating body 9 about the rotation axis Q1. Further, the rotation driving means 7 is connected to the delivery rotating body 9 and is rotatable about the rotation axis Q1.
Is housed in the drive device housing space 5 and a drive shaft member 7a penetrating through the drive shaft member 7a. It means that it is constituted by the motor unit 7b. The electric cable 61 that connects the motor unit 7b to an operation unit (not shown) or a power supply unit (not shown) is connected to the drive device housing space 5 and the outside of the casing 2 as shown in FIG. It is provided so as to penetrate the rear wall portion 2b adjacent to the drive device storage space 5, and the inside of the rear wall portion 2b from the drive device storage space 5 toward the outside of the casing 2 at the penetration portion of the electric cable 61. A tapered hole 2c having a converging shape is provided so as to penetrate the rear wall portion 2b. In addition, a plug 62 having a shape matched with the tapered hole 2c, that is, a wedge-shaped plug 62 is adhesively inserted into the tapered hole 2c, and the electric cable 61 penetrates the plug 62. It is adhesively connected to the plug 62. That is, the plug 62 to which the electric cable 61 is adhesively connected is inserted and adhered into the tapered hole 2c, so that the electric cable 61 penetrates the rear wall portion 2b. As described above, the electric cable 61 has the rear wall 2
Since it is in a state of penetrating through b, when the atmospheric pressure in the drive device housing space 5 becomes higher than the outside of the casing 2 as will be described later, the force due to the differential pressure is applied to the plug 62 by a taper hole. It acts in such a way as to further penetrate into 2c. Therefore, the seal between the plug 62 and the rear wall portion 2b in the tapered hole 2c is more reliable and convenient.

As shown in FIG. 1, FIG. 2 and FIG. 4, the delivery rotary member 9 is composed of two disk-shaped side disks 9a, 9a and one central partition plate which is a disk having a diameter slightly smaller than those of the side disks 9a. The central partition plate 40 is located between the side disks 9a, 9a, and is arranged concentrically and in parallel with each other. Further, the central partition plate 40 and the side disk 9a on the arrow B side
Between the center partition plate 40 and the side disk 9a on the side of the arrow C, the center disks 9b are respectively provided.
And the side disk 9a. The diameter of each central disk 9b is substantially the same as that of the central partition plate 40 (note that in FIG. 4, the feed rotor 9 is shown with the side disk 9a on the arrow B side omitted). Further, each central disk 9b is a known milling cutter (or a gear or the like may be used). Therefore, a plurality of blade grooves 9e (in the case of a gear, teeth) are formed over the entire outer circumference 9d of the central disk 9b. Groove) has an equal installation pitch S about the rotation center Q2.
It is made of P. Each groove 9e of each central disk 9b is
Abrasive collection which is closed in the directions of arrows B and C by the side disks 9a sandwiching the central disk 9b from both sides and the central partition plate 40, and therefore opened only in the centrifugal direction with respect to the rotation center Q2 of the delivery rotary body 9. The recess 9c is formed. That is, these abrasive grain collecting recesses 9c are configured to be able to collect the beads TR, and these abrasive grain collecting recesses 9c are formed at the same installation pitch SP about the rotation center Q2. It should be noted that a plurality of abrasive grain collecting recesses 9 formed on the outer peripheral portion 9d of the delivery rotating body 9
c is two rows of abrasive grain collecting means 41, 41 formed by these abrasive grain collecting recesses 9c arranged annularly over the outer peripheral portion 9d.
The abrasive grain collecting means 41, 41 are arranged in parallel along the directions of arrows B, C. In addition, these abrasive grain collecting means 41, 41 are
Between 41, the arrangement phase of the abrasive grain collecting recesses 9c is displaced. That is, since the two central disks 9b are arranged so as to be offset from each other by the angle SPP which is ½ of the installation pitch SP, the abrasive particle collecting recess 9c is located at the rotation center Q2 in the entire delivery rotary body 9. It means that they are formed with a pitch of the angle SPP centered on. As shown in FIG. 2, of the casing 2, the front wall portion 2a located closest to the arrow B and in contact with the abrasive grain delivery space 3 is a portion of the casing 2 other than the front wall portion 2a. It is detachable via a bolt or the like (not shown), and has a delivery rotary member 9 and a drive shaft member 7.
It can also be attached to and detached from a by a predetermined mounting bolt or the like (not shown). That is, by removing the front wall portion 2a of the casing 2 and exposing the abrasive grain delivery space 3 to the outside, maintenance of the abrasive grain delivery space 3 and the like can be performed easily, and further, the delivery rotary body 9 and By detaching from the drive shaft member 7a, the delivery rotary member 9 can be replaced.

Further, as shown in FIG. 1, in the abrasive grain delivery space 3 in the casing 2, an abrasive grain fly-out prevention cover 10 (the abrasive grain fly-out prevention cover 10 is omitted in FIGS. 2 and 4). The abrasive grain fly-out prevention cover 10 has a shape along the outer peripheral portion 9d of the delivery rotary member 9, that is, the outer peripheral portion 9d of the central disks 9b, 9b and the central partition plate 40 (hence, A contact coating portion 10c having a shape inserted between the side disks 9a, 9a is formed. Contact coating part 10c
Is from the predetermined cover position KB on the outer peripheral portion 9d of the delivery rotary body 9 slightly on the arrow A side of the bottom end position of the delivery rotary body 9 to on the arrow A side of the top end position of the delivery rotary body 9. Is in contact with the outer peripheral portion 9d over a predetermined abrasive grain fly-out position TT on the opposite side, that is, over a predetermined distance L1, and the abrasive grain fly-out prevention cover 10 has a cover position KB and an abrasive grain KB. Projection position TT
At the end 10 which is also the end of the contact covering 10c
a and 10b are formed respectively. In addition, a predetermined leaf spring 60 is attached to the abrasive grain delivery space 3 in the casing 2 so as to exert a reaction force on the casing 2 and the abrasive grain fly-out prevention cover 10 is directed toward the delivery rotary body 9. It is provided in a biasing manner, and the contact between the contact covering portion 10c and the outer peripheral portion 9d is held by the bias of the leaf spring 60. In other words, in the beads TR collected in the abrasive grain collecting recess 9c of the rotary delivery body 9, the abrasive grain collecting recess 9c is in contact with the contact coating portion 1.
When it exists at a position corresponding to 0c, it is covered with the abrasive grain fly-out prevention cover 10 so as not to fly out to the outside of the abrasive grain collecting recess 9c as much as possible (according to the present invention. The blasting machine uses this abrasive grain fly-out prevention cover 10
It may be configured in a form not including the above. ).

On the other hand, the casing 2 is provided with abrasive grain blowing means 51 as shown in FIG. The abrasive grain blowing means 51 has an abrasive grain take-out pipe 25 connected to the casing 2 in such a manner that the abrasive grain take-in port 52, which is one of the opening ends, is opened to the abrasive grain feed-out space 3 in the casing 2. Therefore, the abrasive grain inlet 52 is located in the vicinity of the top end position of the delivery rotary body 9, that is, above the abrasive grain storage level TL so as to face the abrasive grain collecting recess 9c of the delivery rotary body 9. It is arranged. That is, the abrasive grain intake port 52 is the delivery rotary member 9
Are arranged at a central position CA (position corresponding to the central partition plate 40 in this embodiment) in the directions of arrows B and C of the two abrasive grain collecting means 41, 41. , 41 can be opposed to the abrasive grain collecting recesses 9c at substantially equal distances. Further, the end portion 10b of the abrasive grain fly-out prevention cover 10 formed at the abrasive grain fly-out position TT near the top end position of the delivery rotary member 9 is arranged near the abrasive grain intake port 52. . A predetermined blowing nozzle 25a is provided on the opposite side of the abrasive grain take-out pipe 25 from the abrasive grain take-in port 52.
Is provided, and the air and the beads TR that have flowed into the abrasive grain take-out pipe 25 through the abrasive grain take-in port 52 are
It can be blown out to the outside via a. Further, an opening / closing valve 25b which can open and close the inside of the abrasive grain extracting pipe 25 is provided in the middle of the abrasive grain extracting pipe 25.

Further, as shown in FIG. 1, the casing 2 is provided with abrasive grain supply means 11, and the abrasive grain supply means 11 includes a hopper tank 12 in which an abrasive grain storage space 12a is formed. It is supported by the casing 2 (or the work place (not shown) through an appropriate support member (not shown), and is provided at a level position higher than that of the casing 2. The beads TR are freely stored in the abrasive grain storage space 12a.
2a has a shape that converges toward the bottom portion 12b of the hopper tank 12. The bottom 12b of the hopper tank 12 is provided with a pyramid-shaped cone member 16 capable of laterally dispersing the pressure from the beads TR from above.
The bottom 12b of the hopper tank 12 and the cone member 16 are provided with the abrasive grain introduction holes 13 on the side portions 16a of the cone member 16 in the form of forming a receiving port 13a opening toward the abrasive grain storage space 12a. ing. Also hopper tank 12
An abrasive grain supply pipe 15 is provided in the vicinity of the bottom portion 12b of the abrasive grain supply hole 13 so as to be continuously connected to the abrasive grain introduction hole 13, and the tip end side of the abrasive grain supply pipe 15 extends downward to form the abrasive grain delivery space 3 of the casing 2.
The casing 2 in the form of forming a discharge port 15a that opens at
It is connected to the. That is, the beads TR stored in the abrasive grain storage space 12a are received by the receiving port 13 due to their own weight or the like.
through the a into the abrasive grain introducing hole 13 and the abrasive grain introducing hole 13
Further, it can flow into the abrasive grain supply pipe 15 and be discharged and supplied to the abrasive grain delivery space 3 via the discharge port 15a. In addition, the discharge port 15a of the abrasive grain supply pipe 15 is the rotation delivery member 9
Is opened at a position higher than the rotation center Q2, and the above-described predetermined abrasive grain storage level TL is a level near the discharge port 15a. That is, the beads TR are supplied to the abrasive grain delivery space 3 through the discharge port 15a of the abrasive grain supply pipe 15, and the beads TR are stored in the abrasive grain delivery space 3, but the stored beads TR are at the abrasive grain storage level. By reaching the TL, the stored beads TR block the discharge port 15a, so that the supply of the beads TR through the discharge port 15a is stopped. That is, the beads TR are not stored in the abrasive grain delivery space 3 beyond the abrasive grain storage level TL.

On the other hand, as shown in FIG. 1, the hopper tank 12 is formed with a substantially horizontal upper plate portion 26, and the upper plate portion 26 is formed so as to vertically penetrate the upper plate portion 26. ,
Therefore, the abrasive grain introducing hole 27 is formed so as to communicate the inside and outside of the hopper tank 12. An O-ring or the like made of a rubber member or the like is provided around the abrasive grain introducing hole 27 on the upper surface side of the upper plate portion 26 to form an annular sealing portion 27a. A closing lid 29 that can close the abrasive grain introducing hole 27 is provided. That is, the closing lid 29 in the state shown in FIG. 1 is provided by being mounted in the abrasive grain introducing hole 27 such that the closing lid 29 is placed from the upper surface side of the upper plate portion 26. Further, on the lower surface side of the closing lid 29, there is formed a sealing portion 29a formed of an annular surface capable of abuttingly engaging with the sealing portion 27a of the upper plate portion 26. Between the closing lid 29 and the upper plate portion 26, which are attached to each other, the sealing portions 27a and 29a are in abutting engagement with each other. Further, as shown in FIGS. 1 and 3, the upper plate portion 26 is provided with two supporting bolts 30 and 30 extending and protruding upward in a symmetrical position with respect to the abrasive grain introducing hole 27. Provided and support bolts 30, 30
The support nuts 31, 31 are screwed into the respective ones. The support bolts 30, 30 are provided with a lid pressing plate 32, and the lid pressing plate 32 is provided with two bolt insertion holes 33, 33. 1 and 3
In the state (illustrated by the solid line), the lid pressing plate 32 is located at a predetermined pressing position AT, and the lid pressing plate 32 has two supporting bolts 30, 30 inserted into the two bolt insertion holes 33, 33. , Are arranged in a substantially horizontal state.
Further, a pressing rib 32a protruding downward is formed on the lower surface side of the lid pressing plate 32, and the lid pressing plate 32 is tightened and pressed downward by the support nuts 31, 31 from the upper side thereof. That is, the lid pressing plate 32 presses the closing lid 29 attached to the abrasive grain introducing hole 27 into the pressing rib 32.
In this pressed state, the sealing portions 27a and 29a are in contact with each other with a predetermined sealing force HR. In addition, one of the lid pressing plates 32 (for example, the left side of the paper surface of FIGS. 1 and 3)
3 is provided with a bolt groove 35 that opens to the side of the lid pressing plate 32 so as to be continuous with the bolt insertion hole 33 of FIG. 3, and thus the lid pressing plate 32 located at the pressing position AT is shown by the chain double-dashed line in FIG. Thus, the support bolt 30 inserted in the other bolt insertion hole 33 (for example, the right side of the paper of FIGS. 1 and 3) can be rotated in the direction of arrow D in FIG. That is, as the lid pressing plate 32 rotates, one of the bolt insertion holes 33 (for example, the left side of the paper of FIGS. 1 and 3) is inserted.
The supporting bolts 30 inserted in (1) can be released from the lid pressing plate 32 by passing through the bolt grooves 35. It should be noted that one of the lid pressing plates 32 (for example, FIGS.
State (the left side of the paper of FIG. 2), which is released from the support bolts 30 inserted in the bolt insertion holes 33, and the lid pressing plate 32 does not press the closing lid 29 attached to the abrasive grain introducing hole 27, that is, the released state. The position of is the release position KJ. In addition, the lid pressing plate 32 located at the release position KJ is
The support bolt 30 inserted in the other bolt insertion hole 33 (for example, the right side of the paper surface of FIGS. 1 and 3) is rotated in the direction of arrow E opposite to the direction of arrow D in the drawings to close the lid 29 again. It is also possible to arrange it at a pressing position AT for pressing (when the lid pressing plate 32 is rotated between the pressing position AT and the releasing position KJ, in order to perform this rotating operation as smoothly as possible, for example, the support nut 31, 31
To prevent the pressing between the lid pressing plate 32 and the closing lid 29 as much as possible. ). Also, the lid pressing plate 3
2 is provided with a bolt groove 36 that is open to the side of the lid pressing plate 32 so as to be continuous with the other bolt insertion hole 33 (for example, on the right side of the drawing), and therefore is located at the release position KJ.
Therefore, the lid pressing plate 32 in the state where the supporting bolt 30 inserted in the bolt insertion hole 33 on one side (for example, the left side of the drawing) is released, the supporting bolt 30 on the bolt groove 36 side is passed through the bolt groove 36. , The supporting bolt 30
It is removable from.

As shown in FIG. 2, the casing 2 is provided with an air transport pipe 20 capable of transporting the air pressurized by a predetermined pressure pump 19 so that the transported air can be supplied to the drive device accommodation space 5. The casing 2 is provided with an air extraction pipe 21 capable of transporting the air in the drive device housing space 5 to the outside. Further, as shown in FIG. 1, the tip end side of the air extraction pipe 21 has the first supply pipe 2
2, the second supply pipe 23 is branched into two, the first supply pipe 22 is connected to the casing 2 in such a manner that the transported gas can be supplied to the abrasive grain delivery space 3, and the second supply pipe 23 is transported. The gas is connected to the hopper tank 12 so that the gas can be supplied to the abrasive grain storage space 12a. The pressurizing pump 19 and the air transport pipe 20 constitute a storage space pressurizing means 55 capable of supplying pressurized air to the drive device storage space 5, and the pressurizing pump 19, the air transport pipe 20, and the drive device. The storage space 5, the air extraction pipe 21, and the first supply pipe 22 constitute a delivery space pressurizing means 50 capable of supplying the compressed air to the abrasive grain delivery space 3.
Pressurizing pump 19, air transport pipe 20, drive device storage space 5
The air extraction pipe 21 and the second supply pipe 23 are used for the abrasive grain storage space 1
The hopper pressurizing means 53 is capable of supplying air pressurized to 2a. Therefore, the pressure pump 19 and the air transport pipe 20 are shared between the storage space pressurizing means 55, the delivery space pressurizing means 50, and the hopper pressurizing means 53, and the delivery space pressurizing means 50 and the hopper pressurizing means 50 are further shared. The drive device housing space 5 and the air extraction pipe 21 are shared with the pressure means 53.

Further, an exhaust pipe 37 is provided in the upper plate portion 26 of the hopper tank 12 so as to pass through the upper plate portion 26 in the vertical direction, and an air intake pipe 37 is provided on the abrasive grain storage space 12a side. An entry portion 37a is provided. Air intake part 37a
Is formed like a filter and therefore the air intake 37
Air flows into the exhaust pipe 37 from the abrasive grain storage space 12a via a, but the beads TR cannot flow in. An exhaust port 37b opened to the atmosphere is provided outside the hopper tank 12 of the exhaust pipe 37, and an exhaust valve 37c that can open and close the inside of the exhaust pipe 37 is provided in the middle of the exhaust pipe 37. .

Since the blasting machine 1 is constructed as described above, when the beads TR are blown out by the blasting machine 1 in order to blast a metal or the like, it becomes as follows. That is, first, in the hopper tank 12, the support nuts 31, 31 are loosened, and the lid pressing plate 32 is pivotally moved from the pressing position AT to the releasing position KJ as shown by the chain double-dashed line in FIG. Remove the closure lid 29 from 27. Next, the beads TR, which are glass beads or fine abrasive grains in powder form, are introduced into the abrasive grain storage space 12a through the abrasive grain introducing hole 27. After the insertion, the closing lid 29 is attached to the abrasive grain introducing hole 27 again, the lid pressing plate 32 is pivotally moved from the release position KJ to the pressing position AT, and the support nuts 31, 31 are tightened to close the lid pressing plate 3.
Press 2 downwards. That is, the lid pressing plate 32 presses the closing lid 29, which is mounted in the abrasive grain introducing hole 27, into the pressing rib 3.
2a, and the sealing portions 27a, 2
9a are abutted and engaged with each other with a predetermined sealing force HR, and therefore the abrasive lid 29 is airtightly closed by the closing lid 29.

Next, the operation of the pressure pump 19 is started. That is, the air pressurized by the pressure pump 19 is supplied to the drive device storage space 5 through the air transport pipe 20,
The air supplied to the drive device housing space 5 is further supplied to the abrasive grain delivery space 3 via the air extraction pipe 21 and the first supply pipe 22, or via the air extraction pipe 21 and the second supply pipe 22. It is supplied to the abrasive grain storage space 12a. Therefore, the drive device housing space 5, the abrasive grain delivery space 3, and the abrasive grain storage space 12a are pressurized at substantially the same atmospheric pressure. However, the exhaust valve 37c in the exhaust pipe 37 of the hopper tank 12 and the opening / closing valve 25b in the abrasive grain blowing means 51 are closed. On the other hand, most of the beads TR put in the abrasive grain storage space 12a are in a state of being stored in the abrasive grain storage space 12a, but especially the beads TR located near the bottom 12b of the abrasive grain storage space 12a have their own weight, etc. (Because there is almost no atmospheric pressure difference between the abrasive storage space 12a and the abrasive delivery space 3 as described above), it flows into the abrasive introduction hole 13 through the receiving port 13a of the cone member 16, It flows into the abrasive grain supply pipe 15 through the introduction hole 13 and is discharged and supplied to the abrasive grain delivery space 3 through the discharge port 15a. Subsequently, the beads TR are supplied to the abrasive grain delivery space 3, the beads TR are stored in the abrasive grain delivery space 3, and the beads TR that have been stored reach the abrasive grain storage level TL, and the beads TR are discharged through the discharge port 15a. The supply of TR is stopped. After that, each time the beads TR stored in the abrasive grain delivery space 3 decrease, new beads TR are supplied from the abrasive grain storage space 12a side to the abrasive grain delivery space 3 through the discharge port 15a as described above, and thus the abrasive grains TR are ground. The level of the beads TR stored in the grain delivery space 3 is kept at the abrasive grain storage level TL as much as possible. Since the compressed air in the drive device storage space 5 is supplied to the abrasive grain delivery space 3 via the air extraction pipe 21 and the first supply pipe 22 as described above, the drive device storage space 5 The atmospheric pressure inside is slightly higher than the atmospheric pressure inside the abrasive grain delivery space 3. That is, when the beads TR in the abrasive grain delivery space 3 try to enter the drive device storage space 5 side through the gap between the partition member 6 and the drive shaft member 7a, etc. This is prevented by the differential pressure between the drive device storage space 5 and the drive device storage space 5. That is, it is convenient to prevent the drive shaft member 7a and the like from being worn and damaged.

Next, the rotation driving means 7 starts the operation of the motor unit 7b, and therefore the drive shaft member 7a is driven to rotate about the rotation shaft Q1 in the direction of arrow A in the figure, and also via the drive shaft member 7a. The delivery rotating body 9 is rotationally driven in the direction of arrow A in the figure. Since the beads TR are stored in the abrasive delivery space 3 up to the abrasive storage level TL as described above, the lower part of the delivery rotating body 9 is buried in the stored beads TR. Therefore, when the delivery rotating body 9 rotates in the abrasive grain delivery space 3, the lower side of the delivery rotating body 9 rotates in the stored beads TR. By rotating in the stored beads TR, each of the abrasive grain collecting recesses 9c of the delivery rotating body 9 collects the beads TR by scraping the stored beads TR. Each abrasive grain collecting recess 9c that collects the beads TR sequentially reaches the cover position KB by the further rotation of the delivery rotator 9, and is covered by the abrasive grain fly-out prevention cover 10 from the cover position KB. At the abrasive grain ejection position T
T is reached in sequence.

On the other hand, after the operation of the motor unit 7b is started, the blowing nozzle 25a of the abrasive grain blowing means 51 is directed toward the object to be blasted such as metal, and the opening / closing valve 25b of the abrasive grain blowing means 51 is opened. To do. When it is opened, it is exposed to the atmosphere through the blow-out nozzle 25a and the abrasive-grain extracting pipe 25,
The abrasive grain delivery space 3 having a pressure higher than the atmospheric pressure communicates. Therefore, since air flows from the abrasive grain delivery space 3 into the atmosphere through the blowing nozzle 25a and the abrasive grain take-out pipe 25, the abrasive grain take-out pipe 25 is provided near the abrasive grain take-in port 52 as shown in FIG. ,
An air flow KR flowing from the abrasive grain delivery space 3 into the abrasive grain take-out pipe 25 via the abrasive grain inlet 52 is generated. By the way, in the delivery rotating body 9, as described above, the abrasive grain collecting recesses 9c that have collected the beads TR sequentially reach the cover position KB and are covered by the abrasive grain fly-out prevention cover 10 so that the abrasive grains are covered. The abrasive grain ejection position TT at a position facing the intake port 52 is sequentially reached. Therefore, in each of the abrasive grain collecting recesses 9c sequentially moved to the abrasive grain ejecting position TT, the beads TR collected in the abrasive grain collecting recesses 9c ride on the air flow KR to collect the abrasive grains. It jumps out from the recess 9 c and flows into the abrasive grain take-out pipe 25 through the abrasive grain take-in port 52. The beads TR that have flowed into the abrasive grain extracting pipe 25 together with the air are the abrasive grain extracting pipe 25 and the blowing nozzle 25a.
It is blown out to the outside together with the air through the, so that the blasting is performed. Therefore, in the abrasive grain blowing means 51, the delivery rotor 9 has an angle S which is one half of the installation pitch SP.
The beads TR flowing into the abrasive grain blowing means 51 because the amount of beads TR trapped in each of the abrasive grain trapping recesses 9c, that is, a substantially constant amount of the beads TR, flow in every time the PP is rotated, that is, at equal time intervals. The TR density is kept as constant as possible. That is, the beads TR are blown out through the abrasive grain blowing means 51 in such a manner that the unevenness of the blowout density is eliminated as much as possible and the blowout density is kept as uniform as possible.

The abrasive grain storage space 1 of the hopper tank 12
The amount of beads TR remaining in 2a becomes small, and when the beads TR are replenished, the opening / closing valve 25b of the abrasive grain blowing means 51 is used.
Is closed, the motor unit 7b is stopped to stop the feed rotor 9, and then the operation of the pressurizing pump 19 is stopped. After that, the exhaust valve 37c of the exhaust pipe 37 is opened,
The air in the abrasive grain storage space 12a is exhausted into the atmosphere through the exhaust pipe 37 to reduce the pressure. Since the abrasive grain storage space 12a, the abrasive grain delivery space 3 and the drive device storage space 5 communicate with each other through the air extraction pipe 21, the first supply pipe 22, and the second supply pipe 23,
Along with the abrasive grain storage space 12a, the abrasive grain delivery space 3 and the drive device storage space 5 are also decompressed and become substantially equal to the atmospheric pressure. After depressurization, first, in the hopper tank 12, the support nut 31,
31 is loosened and the lid pressing plate 32 is pivotally moved from the pressing position AT to the releasing position KJ to remove the abrasive grain introducing hole 27.
Remove the closure lid 29 from. Since the inside of the abrasive grain storage space 12a is approximately equal to the atmospheric pressure, the closing lid 29 can be safely removed. Next, the beads TR, which are glass beads or fine abrasive grains in powder form, are introduced into the abrasive grain storage space 12a through the abrasive grain introducing hole 27. After the charging, the closing lid 29 is mounted in the abrasive grain charging hole 27 again, the lid pressing plate 32 is pivotally moved from the release position KJ to the pressing position AT, and the support nuts 31, 31 are tightened to lower the lid pressing plate 32 downward. Press.

In the above-mentioned embodiment, the blowout density of the beads TR can be adjusted by adjusting the rotation speed of the feed rotary member 9, but the front wall portion 2a of the casing 2 can be detachably attached via a bolt or the like (not shown). Since the delivery rotary body 9 and the drive shaft member 7a are also detachable by a predetermined mounting bolt or the like (not shown), the abrasive grain catching recess 9 is formed.
A plurality of types of delivery rotating bodies 9 having different sizes of c, installation pitch SP, or the like are prepared, and the blasting machine 1 is selected according to the desired high or low blowing density of the beads TR.
It is also possible to select and replace the type of the delivery rotating body 9 in.

Further, in the above-mentioned embodiment, the delivery rotary body 9 has one central partition plate 40 and two central disks 9b, 9b, but in another embodiment, the delivery rotary body has three or more delivery rotary bodies. The central disk 9b and two or more central partition plates 40 for partitioning the central disks 9b, 9b may be provided.

The delivery rotary body is the delivery rotary body 9 described above.
It may be configured in other forms. For example, the delivery rotating body 65
As shown in FIG. 5, the disk main body 69 has a disk main body 69, and the disk main body 69 is rotated by the rotation driving means 7 to form the abrasive grain delivery space 3
Is provided so as to be rotatable about the rotation axis Q1 in the arrow A direction. Outer peripheral portion 65a of the disc body 69
Is provided with two annular grain collecting means 67 in parallel along the directions of arrows B and C in the drawing, which is the extending direction of the rotation axis Q1, and each grain collecting means 67 is The disk main body 69 is formed of abrasive grain collecting recesses 66 capable of collecting the beads TR formed at the same installation pitch SP over the entire circumference of the outer peripheral portion 65a. Further, in the abrasive grain collecting means 67, the arrangement phase of the abrasive grain collecting recesses 66 between these abrasive grain collecting means 67, 67 is, for example, an angle S at which the arrangement pitch SP is half the installation pitch SP.
They are arranged in a form shifted by PP.

[0031]

As described above, the first aspect of the present invention has the casing such as the casing 2 in which the abrasive grain feeding space such as the abrasive grain feeding space 3 is formed, and the above-mentioned abrasive grain feeding A delivery rotary body such as the delivery rotary bodies 9 and 65 is provided in the space so as to be rotatable about a predetermined rotation axis such as a rotation axis Q1 with respect to the casing, and an outer peripheral portion 9d of the delivery rotary body is provided.
On the outer peripheral portion of 65a or the like, a plurality of abrasive grain collecting means such as annular grain collecting means 41, 67 are provided in parallel along the extending direction of the rotating shaft, and each of the grain collecting means is A plurality of abrasive grains, such as abrasive grain collecting recesses 9c, 66, capable of collecting abrasive grains such as beads TR formed at the same installation pitch SP as the entire circumference of the outer circumference of the delivery rotating body. The abrasive grain collecting means comprises a grain collecting portion, and the abrasive grain collecting means is arranged such that the arrangement phase of the abrasive grain collecting portions is shifted between the adjacent abrasive grain collecting means, and A rotary drive means such as a rotary drive means 7 for rotating the delivery rotary body about the rotation axis is provided, and an abrasive grain supply means such as an abrasive grain supply means 11 is provided in the casing in the abrasive grain delivery space. The abrasive grains are provided in such a manner that they can be supplied, and a delivery space pressurizing means such as the delivery space pressurizing means 50 is provided in the casing. A pressurized air is provided in the abrasive grain delivery space so that pressurized air can be supplied, and an abrasive grain blowing means such as an abrasive grain blowing means 51 is provided in the casing, and an abrasive grain taking-out port 52 or the like of the abrasive grain blowing means is provided. Since the inlet is provided so as to face the abrasive grain collecting portion of the delivery rotating body, and the opening is provided above the abrasive grain storage level such as the abrasive grain storage level TL of the abrasive grain delivery space. When the blasting machine of the present invention is used, the abrasive grains are supplied and stored in the abrasive grain delivery space by the abrasive grain supply means, and the supplied and stored abrasive grains are rotationally driven about the rotation axis by the rotation drive means. The particles are collected by the respective abrasive-particle collecting portions of the abrasive-particle collecting means of the feeding rotating body. Further, by further rotation of the delivery rotating body, each abrasive grain collecting portion of each abrasive grain collecting means that has collected the abrasive grains is sequentially moved to a position facing the abrasive grain intake of the abrasive grain blowing means. To be In the vicinity of the abrasive grain inlet of the abrasive grain blowing means, the air in the abrasive grain feeding space pressurized by the feeding space pressurizing means passes through the abrasive grain blowing means through the abrasive grain blowing port and the abrasive grain feeding space. Of the air flow KR flowing from the abrasive grain delivery space to the abrasive grain blowing means through the abrasive grain intake port in the vicinity of the abrasive grain intake port. Therefore, in each of the abrasive grain collecting portions that are sequentially moved to the position facing the abrasive grain inlet, the abrasive grains collected by the abrasive grain collecting portion ride on the air flow KR and the abrasive grain collecting portion. And flows into the abrasive grain blowing means through the abrasive grain inlet. The abrasive grains that have flown into the abrasive grain blowing means together with the air are blown out together with the air through the abrasive grain blowing means. Therefore, every time the delivery rotating body rotates by the installation pitch, that is, at equal time intervals, each abrasive grain collecting section of each abrasive grain collecting means faces the abrasive grain inlet of the abrasive grain blowing means. Since the abrasive grains that have been moved to and are collected by the respective abrasive grain collecting portions flow into the abrasive grain blowing means, the density of the abrasive grains flowing into the abrasive grain blowing means is kept as constant as possible. Further, each abrasive grain collecting part of one abrasive grain collecting means is sequentially moved to a position facing the abrasive grain intake of the abrasive grain blowing means every time the delivery rotating body rotates by the installation pitch. However, since the arrangement phase of the abrasive grain collecting portions is different between the adjacent abrasive grain collecting means, the abrasive grain collecting portion of one abrasive grain collecting means is located at a position facing the abrasive grain inlet. After being moved to, the delivery rotator rotates an angle smaller than the installation pitch, that is, an angle corresponding to the shift of the arrangement phase, so that the abrasive grain collecting portion of another adjacent abrasive grain collecting means. But,
It is moved to a position facing the abrasive grain intake. That is,
In the inflow of abrasive grains sequentially to the abrasive grain blowing means, the time interval at which the inflow is performed is made as short as possible. Therefore, the density of the abrasive grains flowing into the abrasive grain blowing means in a certain period of time is kept even more constant. Therefore, the blowing of the abrasive grains through the abrasive grain blowing means is performed in a manner that the unevenness of the blowing density is eliminated as much as possible and the blowing density is kept as uniform as possible. Further, since the density of the abrasive grains flowing into the abrasive grain blowing means is kept as constant as possible by the rotation of the delivery rotary member, a large amount of abrasive grains are blown out as in the conventional blasting machine with a large variation in blowing density. By doing so, it is not necessary to maintain the minimum blowing density required for processing,
Therefore, consumption of abrasive grains can be saved as much as possible. Also,
Abrasive grains stored in the abrasive grain delivery space are constantly agitated by the rotating delivery rotating body, so that the abrasive grains are not blown out due to processing interruption, etc. Even if the abrasive particles solidify into a dumpling due to, they are immediately crushed by the rotating delivery rotating body and returned to a state suitable for blowing, so that the nozzle is clogged with abrasive particles and it becomes difficult to blow the abrasive particles. Stable blowout, that is, a processing operation can be performed without any trouble.

A second aspect of the present invention is the blasting machine according to the first aspect, wherein the delivery rotary body is formed in a disk shape, and the abrasive grain collecting portion is provided on the delivery rotary body. Since the abrasive grain collecting recesses such as the abrasive grain collecting recesses 9c and 66 that can collect the abrasive grains are formed on the outer peripheral portion, when the delivery rotating body rotates in the abrasive grain delivering space, the abrasive grain delivering operation is performed. The frictional resistance between the abrasive grains in the space and the outer peripheral portion of the delivery rotating body is minimized. That is, in addition to the effect of the first invention,
This is convenient because the rotation of the delivery rotary member becomes smooth and deformation of the abrasive grain collecting recess due to wear is prevented.

A third aspect of the present invention is the blasting machine according to the second aspect, wherein the feed rotor is
Three or more discs such as side discs 9a and 9a arranged in parallel, a central partition plate 40, etc., and a central disc 9b arranged such that one disc is sandwiched between adjacent discs, a milling cutter, and a gear. And the like, and a plurality of abrasive grain collecting grooves such as blade grooves 9e are formed on the outer peripheral portion of each of the groove forming discs. Since the groove is formed by the collecting groove and the two disc bodies adjacent to the groove forming disk, in addition to the effect of the second invention, the groove forming disk has a plurality of blade grooves formed on the outer peripheral portion thereof. It is convenient because a general-purpose member such as a milling cutter or a gear having a plurality of tooth grooves formed on the outer peripheral portion can be adopted.

A fourth aspect of the present invention is the blasting machine according to the first aspect, wherein the abrasive grain inlet of the abrasive grain blowing means is extended by the extension of the rotary shafts of the plurality of abrasive grain collecting means. Since it is arranged at a central position such as the central position CA in the direction, the distance between the abrasive grain collecting portion moved to the position facing the abrasive grain inlet of the abrasive grain blowing means and the abrasive grain inlet is The difference between the plurality of abrasive grain collecting means is as small as possible. In other words, the time required for the abrasive grains collected in the abrasive grain collecting unit to flow into the abrasive grain inlet from the abrasive grain collecting unit moved to the position facing the abrasive grain inlet is Since there is no difference between the plurality of abrasive grain collecting means as much as possible, in addition to the effect of the first invention, the density of the abrasive grains flowing into the abrasive grain blowing means in a certain period of time becomes even more constant. The blowing of the abrasive grains through the abrasive grain blowing means is performed in such a manner that the unevenness of the blowing density is eliminated as much as possible and the blowing density is kept as uniform as possible.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an example of a blasting machine according to the present invention.

2 is a vertical cross-sectional view taken along line X1-Y1 of FIG.

3 is a plan sectional view taken along line X2-Y2 of FIG.

FIG. 4 is a perspective view showing the vicinity of a delivery rotating body.

FIG. 5 is a perspective view showing the vicinity of a feed rotary member in another example of the blasting machine according to the present invention.

[Explanation of symbols]

 1 ... Blasting machine 2 ... Casing 3 ... Abrasive grain delivery space 7 ... Rotation drive means 9 ... Delivery rotating body 9a ... Disk body (side disk) 9b ... Groove forming disk (central disk) 9c ... … Abrasive grain collecting section, Abrasive grain collecting recess (abrasive grain collecting recess) 9d …… Outer peripheral portion 9e …… Abrasive grain collecting groove (blade groove) 11 …… Abrasive grain supplying means 40 …… Board (center Partition plate) 51 ... Abrasive grain collecting means 50 ... Delivery space pressurizing means 51 ... Abrasive grain blowing means 52 ... Abrasive grain inlet 65 ... Delivery rotary body 65a ... Outer peripheral portion 66 ... Abrasive grain capture Collecting portion, abrasive grain collecting recess (abrasive grain collecting recess) 67 ... Abrasive grain collecting means CA ... Central position Q1 ... Rotation axis SP ... Installation pitch TL ... Abrasive grain storage level TR ... Abrasive grain (beads)

Claims (4)

[Claims] 1. A casing having an abrasive grain delivery space formed therein, wherein a delivery rotor is provided in the abrasive grain delivery space so as to be rotatable about a predetermined rotation axis with respect to the casing. A plurality of annular abrasive grain collecting means are provided in parallel in the outer peripheral portion of the delivery rotary body along the extending direction of the rotating shaft, and each of the abrasive grain capturing means is the entire outer peripheral portion of the delivery rotary body. Formed at equal pitches around the circumference, constituted by a plurality of abrasive grain collecting parts capable of collecting abrasive grains, the abrasive grain collecting means, between the adjacent abrasive grain collecting means, Arrangement phases of the abrasive grain collecting portions are arranged in a shifted form, the delivery rotating body is provided with a rotation drive means capable of rotating the delivery rotating body about the rotation axis, and the casing is provided with abrasive grains. Supply means is provided in a form capable of supplying abrasive grains to the abrasive grain delivery space, Is provided with a delivery space pressurizing means in such a manner that pressurized air can be supplied to the abrasive grain delivery space, an abrasive grain blowing means is provided in the casing, and an abrasive grain inlet of the abrasive grain blowing means is provided for the delivery rotation. A blasting machine provided so as to be opposed to the abrasive grain collecting portion of the body, and provided so as to open above the abrasive grain storage level of the abrasive grain delivery space. 2. The delivery rotating body is formed in a disk shape, and the abrasive grain collecting portion is formed on an outer peripheral portion of the delivery rotating body and is capable of collecting abrasive grains. The blasting machine according to claim 1, wherein 3. The delivery rotary body is composed of three or more disc bodies arranged in parallel and a groove forming disc arranged such that one disc is sandwiched between adjacent disc bodies. A plurality of abrasive grain collecting grooves are formed on the outer peripheral portion of the forming disk, and the abrasive grain collecting recesses are the abrasive particle collecting grooves of each of the groove forming disks,
The blasting machine according to claim 2, wherein the disk body is formed by two disk bodies adjacent to the groove forming disk. 4. The blasting process according to claim 1, wherein the abrasive grain inlet of the abrasive grain blowing means is arranged at a central position in the extending direction of the rotary shaft of the plurality of abrasive grain collecting means. Machine.