JP2003340721A - Projection pattern changeable rotor for blasting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotor capable of changing a projection pattern for a blasting device for changing and moving a projection range, preventing a power- down of a blade 2, saving the energy by the concentrated projection, using the inexpensive blade 2 and easily changing the blades. <P>SOLUTION: Four blades 2 are fitted with a predetermined distance from a center of a rotary plate 1, a tip of a flow-in pipe 3 is disposed slightly separate from the center of the rotary plate 1 on the side with the blade 2 fitted thereto, and the blade 2 is disposed while a center of a feed port 31 is agreed with the center of the blade in the width direction. Preferably, a projection surface 21 of the blade 2 is U-shaped, a wear resistant member is provided on an inner circumference, or a mechanism for regulating the angle of the feed port 31 is provided. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projection pattern changeable rotor for dry and wet blasting devices.

[0002]

2. Description of the Related Art Generally, most of the shot blasting devices are dry type, and the rotor of the rotor forcibly sends abrasives from above to a blade that rotates at a high speed by a drive motor, and the abrasives are projected by the blades. It was of structure. The structure of the rotor is composed of a rotating portion such as a rotating plate including a blade to which the abrasive is blown, and a supply portion for introducing the abrasive into the blade.
Also, many use eight blades to improve the balance of projection, and the blades are easily worn,
A wear-resistant special metal was used. At this time, the projection pattern of the abrasive had a wide projection range. Further, as the shape of the supply port through which the abrasive is supplied to the blade, a slit-like long hole is generally used, and there is one in which the angle of the supply port can be changed. This structure has a double structure and is adjusted. It was a mechanism.

Also, in recent years, Japanese Patent Laid-Open No. 11-3163.
No. 54 discloses a wet blasting device using a rotor, and the structure of the rotor used therein is as shown in FIG. 8, in which water mixed with an abrasive (blast material) is naturally poured from above through a suction pipe, The water mixed by the nozzle was supplied from the right side of the center of the figure. At this time, the projection pattern of the abrasive mixed with water had a wide projection range as in the dry type.

[0004]

However, since eight blades are used in the rotor of the dry blast device, all eight blades must be replaced when they are worn out, which is troublesome to replace. Since the blade is made of a special metal having wear resistance, it takes a lot of time and effort to manufacture the blade, which is expensive. Also, the dry blasting device is convenient for blasting a wide range, but for blasting in a narrow range such as when using a small basket barrel or when using a turntable to process low height items. It was not suitable. Further, the structure in which the angle of the supply port can be changed has a problem that the structure is complicated, the manufacturing is time-consuming and expensive, and it takes a lot of time and labor to replace the parts.

On the other hand, the rotor used in Japanese Unexamined Patent Publication No. 11-316354 is projected in the direction of 360 degrees and hits the cover body (5 ') with an abrasive material (projection material), which causes considerable abrasion, so that the cover body ( 5 ') was severely damaged. Also, after hitting the cover body (5 '), it falls down as shown by the dotted line arrow in the figure, and it becomes a state that it functions as a water curtain, and the projected object and the hanging object collide with each other. , The power of the projection is reduced. Furthermore, since the left side hitting is smaller than the right side in the figure in the width direction of the blade (2 ′), the projection is uneven, so that the finish of the blasting is uneven.
There has been a problem that the blades (2 ') are likely to be locally worn.

An object of the present invention is to provide a rotor capable of changing a projection pattern by changing the length of the blade so that the projection range can be changed and the power down of the blade can be prevented.

Another object of the present invention is to provide a rotor capable of changing a projection pattern for a blasting device, in which the power of the blade is improved to save energy, and the blade can be replaced easily when it is worn out at low cost.

Another object of the present invention is to provide a rotor capable of changing a projection pattern for a blasting device capable of adjusting movement of the entire projection range.

[0009]

The present invention has been made to solve the above problems, that is, the center of a rotating plate for changing the projection range and preventing power down of the blade. The blade was attached at a predetermined distance from, and the tip of the inflow pipe was placed slightly away from the center of the rotary plate on the side where the blade was attached, and the center of the supply port was aligned with the center of the blade in the width direction. Make up with structure. At this time, the minimum of the predetermined distance is the length that the blade does not contact the outer circumference of the inflow pipe during rotation, and the maximum of the predetermined distance is
The length of the blade is about half the width of the blade when it is attached to the outer circumference of the rotating plate, and the tip of the inlet port is set so that the tip of the supply port can maintain a slight gap with the inner edge of the blade. It is better to place them.

Further, since the power of the blade is concentrated to save energy, and the blade can be replaced easily when it is worn out at low cost, the projection surface of the blade is formed in a U-shape. It is advisable to provide a wear resistant member on the inner circumference of the blade and to use four blades.

Further, in order to adjust the movement of the entire projection range, the blade is attached away from the center of the rotary plate, and the tip of the inflow pipe is disposed slightly away from the center of the rotary plate on the side where the blade is attached. The inlet pipe is placed so that the center of the supply port and the center of the blade in the width direction are aligned, and the inlet pipe is supported and fixed to the cover that is installed so as not to scatter abrasives etc. to the outside when the blade is projected. And a plurality of oblong mounting holes are formed in the flange.

[0012]

1 to 4 are views showing an embodiment of the present invention, and description will be made based on this. Reference numeral (1) is a rotary plate which is rotated at a high speed by a drive motor (6). Reference numeral (2) denotes four blades mounted at a predetermined distance (L) from the center of the rotary plate (1). The projection surface (21) of the blade (2) is recessed so that its cross-sectional shape is It is formed in the shape of. Further, as the material of the blade (2), iron, stainless steel, aluminum or the like may be used, and the length of the blade (2) is the same as approximately half its width, which is the shortest. Is. In addition to this shortest blade, multiple types of blades with different lengths (2)
It is advisable to prepare a plurality of rotary plates (1) to which is attached, but it is preferable to prepare three types of one, the longest one, the shortest one, and the intermediate length. Further, the projection surface (21) of the blade (2) does not necessarily need to be recessed in a U shape, and may be a surface curved inward or a flat surface.

(3) is an inflow pipe having a tubular supply port (31), and the tip of the inflow pipe (3) is slightly from the center of the rotary plate (1) on the side where the blade (2) is attached. The blades (2) are placed apart from each other and the center of the supply port (31)
The inflow pipe (3) is arranged so that the centers in the width direction thereof are aligned with each other (see FIGS. 2 and 3). In addition, the supply port (3
1) is detachably provided by screwing with the inflow pipe (3), and is attached at a right angle to the inflow pipe (3). Moreover, the tip end of the supply port (31) is kept slightly spaced from the inner end of the blade (2). Incidentally, it is preferable to prepare in advance a supply port (31) corresponding to each type of blade (2) attached to the rotary plate (1). Further, although the inflow pipe (3) shown in the figure is for wet type, in the case of dry type, the supply port (31) (not shown) is slanted so that the abrasive is smooth in order to prevent the abrasive from being stagnant. It is preferable to dispose the inflow pipe (3) so as to discharge the liquid into the interior, and to smoothly form the inner shape of the attachment portion of the supply port (31) and the inflow pipe (3) so that there is no step. good. Reference numeral (4) is a flange for supporting and fixing the inflow pipe (3), and the flange (4) is provided with four elongated hole-like mounting holes (41). The flange (4) is fixed to the outside of a cover (5) described later by fastening members (9) such as bolts and nuts. Reference numeral (5) is a cover installed so as not to scatter the mixed liquid of the abrasive and the liquid when the blade (2) is projected, and the cover (5) is provided on the upper surface of the processing chamber (8). Has been. Incidentally, the cover (5)
The upper and side surfaces of the are assembled separably. (7) is a wear-resistant member attached to the U-shaped cross section of the projection surface (21) of the blade (2), and the wear-resistant member (7) is a U-shaped cross section of the projection surface (21). It is advisable to attach a thin plate of, for example, 3 mm to 5 mm to the plane to be mounted and projected on the inner periphery of, and to attach a thin plate of, for example, 2 mm to both inner surfaces of the plane. Further, as the material of the wear resistant member (7), it is preferable to use cemented carbide, boron, ceramics or the like.

5 and 6 are views showing another embodiment of the present invention, which is different from the above embodiment in that the blade (2)
And the inflow pipe (3) are different, and the others are the same. The blade (2) and the inflow pipe (3) will be described in detail. First, the blade (2) is four blades mounted at a predetermined distance (L) from the center of the rotating plate (1). Although the projection surface (21) of the blade (2) is recessed to form a U-shaped cross section, it may be flat.
Further, iron, stainless steel, aluminum, or the like may be used as the material of the blade (2), and the length of the blade (2) is equal to that of the inflow pipe (3) described later when the blade (2) rotates. The predetermined distance (L) in which a gap is secured so as not to contact the outer circumference is the minimum, and the blade (2) is the longest. At this time, the one in which the predetermined distance (L) is set to the maximum is shown in FIG. 2, in which the blade (2) is the shortest. Next, the inflow pipe (3) will be described. The tip of the inflow pipe (3) is
The blade (2) is arranged slightly apart from the center of the rotary plate (1) on the side where the blade (2) is attached, and the center of the supply port (31) is aligned with the center of the blade (2) in the width direction. Although the inflow pipe (3) is arranged, the supply port (31) is formed by directly forming a hole in the inflow pipe (3). Although the inflow pipe (3) shown in the figure is for wet type, in the case of dry type, the supply port (31) is slightly projected from the inflow pipe (3) in order to prevent the polishing material from being stagnant. The supply port (31) and the inflow pipe (3) may be provided so that the inner shapes thereof are not stepped, and the inflow pipe (3) is inclined so that the abrasive can be discharged smoothly. preferable.

Next, the operation of the present invention will be described. First, when the rotor is rotated, the mixed liquid obtained by stirring the liquid and the abrasive is discharged horizontally from the supply port (31). This mixed liquid is applied to the blade (2) before hitting the inner circumference of the cover (5).
Projected by. At this time, the mixed solution is scraped off near the center line in the width direction of the blade (2) shown in FIGS. 2, 3 and 6 and the width thereof is not widened by the U-shaped projection surface (21). Since it can be dropped, it can be projected efficiently. The conventional blade (2) usually has eight blades, and when it is four blades, the projection power is halved and the projection balance is poor. It has been confirmed that there is almost no problem with the projection capability. In addition, what is discharged from the supply port (31) is not limited to the mixed liquid, and may be only the abrasive. At this time, the supply port (31)
Is a dry type not shown.

The above operation is performed by a wet blasting device (Japanese Patent Laid-Open No. Hei 11)
Compared with the action of No. 316354), in the present invention, the tip of the inflow pipe (3) is rotated by a rotating plate so that the mixed liquid to be supplied is discharged from the supply port (31) toward the center of the width direction of the blade (2). By arranging the blade slightly apart from the central surface of (1), it is possible to efficiently project the light toward the work (not shown) inside the processing chamber (8) without being projected in the direction of 360 degrees as in the conventional case, and the blade ( Since the projection direction of 2) is stable, the wear of the cover (5) is eliminated, the wear of the blade (2) is reduced, and the unevenness in the finish of the blasting is extremely reduced. In particular, when the blade (2) having a short length is used, the diameter of the rotating plate (1) is the same even if the blade (2) is short, so that the projection power is hardly reduced and the projection range is reduced. It is possible to focus on the target, and it is possible to deal with small workpieces by eliminating extra projection. Therefore, since the projections are concentrated, it is possible to shorten the blade processing time, reduce the load on the motor, and save energy. At this time, the projection pattern shown in FIG.
As shown in FIGS. 7A and 7B, the width is not so wide and the projection range is narrow. If the size of the entire apparatus is reduced according to the narrow projection range, the diameter of the rotary plate (1) will be reduced and the projection power will be reduced.

FIG. 7 is a diagram for explaining the projection pattern corresponding to the case where the blade length and the supply port angle are changed. Attach various blades (2) to the rotating plate (1) with a diameter of 250 mm in advance, and rotate the rotating plate (1) 30 times per minute.
Each projection pattern when the blade length is changed to 00 and the blade length is changed more specifically will be described. First, a case where a blade (2) having a length of 20 mm as shown in FIG. 2 is used, and the projection surface (21) is formed in a U shape and the projection surface (21) is a flat surface will be described. To do. Projection surface (21)
When it was formed in a U shape, the projection width was widened to the left and right to be about 40% wider than the width of the blade (2). The projection range was 150 mm [see FIG. 7 (a)]. On the other hand, when the projection surface (21) is a flat surface, the projection width is wider than the width of the blade (2) to the left and right, and especially the right side is wider than the above, and is about 60% wider as a whole. The projection range is 1
It was 50 mm [see FIG. 7 (c)]. Next, when a blade (2) having a length of 110 mm as shown in FIG. 6 is used and the projection surface (21) is formed in a U shape, the projection width is substantially the same as the width of the blade (2). Wide and projection range is 30
It was 0 mm [see FIG. 7 (b)]. Meanwhile, the projection surface (21)
Is flat, the projection width is about 20% wider only on the right side than the width of the blade (2), and the projection range is 300.
mm (see FIG. 7 (d)). At this time, the reason why the left side of the projection width does not become wider than the width of the blade (2) is considered that the rotating plate (1) serves as a wall. In this way, the projection range can be adjusted by changing the length of the blade (2) to widen or narrow the projection pattern, and the projection range can be adjusted according to the size of the work. .

When changing the length of the blade (2), first, the bolts and nuts (not shown) of the cover (5) are loosened to remove the upper and side surfaces. Then, the mounting screw (not shown) of the boss (11) is loosened, the stop ring is removed, and the rotary plate (1) is taken out of the cover (5). Next, cover (5) the rotating plate (1) to which the blade (2) of another length is attached.
Put it inside and insert the boss (11) into the shaft on the drive motor (6) side. Then, tighten the mounting screw and attach the stop ring. Also, the supply port (31) corresponding to the blade (2) is replaced with the previous one and attached to the inflow pipe (3). Furthermore, the bolts and nuts are tightened to attach the upper surface and the side surfaces, and the replacement work is completed. When changing the projection width, the blade (2) may be replaced with a different width. Further, when the blade (2) is worn out, it is sufficient to remove the worn wear-resistant member (7) from the projection surface (21) and replace it with a new wear-resistant member (7).

Next, the case of adjusting the supply port angle will be described. First, loosen the fastening members (9) of bolts and nuts,
The flange (4) is rotated from the outside of the cover (5), and is adjusted by the blade (2) so as to be properly projected onto a work (not shown) and checked. After confirmation, the fastening member (9) is tightened to fix the flange (4) to the cover (5). The movement of the projection pattern when adjusting the supply port angle at this time will be described. In addition, the rotating plate (1) having a diameter of 250 mm has a length 110 of the blade (2) as shown in FIG.
A case in which the projection surface (21) is formed in the shape of a square U and the projection surface (21) is used will be described. First, when the angle of the supply port (31) is advanced with respect to the rotation direction of the blade (2),
The projection pattern has a projection width shown in FIG. 7 (b) that is substantially the same as the width of the blade (2), and the projection range is 300 mm, but the entire projection range moves to the right as indicated by the arrow in the figure. [See FIG. 7E]. On the other hand, when the supply port angle is delayed with respect to the rotation direction of the blade (2), the entire projection range moves to the left as shown by the arrow in the figure [see FIG. 7 (f)]. In this way, the horizontal movement of the entire projection range can be adjusted by the supply port angle, that is, by the extremely simple operation of rotating the flange (4) from the outside of the cover (5) and by the extremely simple structure. is there. At this time, by forming the supply port (31) into a round hole, the processing is easy and the discharge is uniform. If the shape of the supply port (31) is an elongated hole, pressure change is likely to occur on the side opposite to the base side of the supply pipe, and the blade (2) may be locally consumed. Moreover, the discharge was likely to be sparse.

[0020]

The present invention has the following effects due to the following constitution.

As in claim 1, the blade (2) is mounted at a predetermined distance (L) from the center of the rotary plate (1), and slightly from the center of the rotary plate (1) where the blade (2) is mounted. By arranging the tip of the inflow pipe (3) away from each other and arranging the center of the supply port (31) and the center of the blade (2) in the width direction to coincide with each other, the projection range can be changed and the projection can be performed. The power down of the blade (2) when the range is narrowed can be prevented. Further, since it is possible to efficiently project the light onto the work, the wear of the cover (5) is eliminated, and the wear of the blade (2) is totally worn, so that it can be used for a long period of time.

According to a second aspect of the invention, the minimum of the predetermined distance (L) is the length that the blade (2) does not come into contact with the outer circumference of the inflow pipe (3) during rotation, and the maximum of the predetermined distance (L) is the blade. Rotating plate (1) with the same length as approximately half the width of (2)
By installing the tip of the inflow pipe (3) so that it is the length when it is attached to the outer periphery of the blade and the tip of the supply port (31) can maintain a slight gap with the inner end of the blade (2). The length of the blade (2) can be varied, the projection range can be adjusted according to the size of the work, and the power down of the blade (2) can be prevented even when the projection range is narrowed.

According to a third aspect of the present invention, the projection surface (21) of the blade (2) has a U-shaped cross section, and the wear resistant member (7) is provided on the inner circumference of the projection surface (21). By providing the conventional blade (2) itself, the material of the blade (2) itself is not a special metal, so that the workability is good, the production is not troublesome, and the cost is low. Further, for maintenance, only the abrasion resistant member (7) on the projection surface (21) needs to be periodically replaced and replaced, and the replacement of the blade (2) when it is worn out can be performed easily and inexpensively. Moreover, by using the blade (2) of the projection surface (21) having a U-shaped cross section, power can be concentrated and energy can be saved.

By setting the number of blades (2) to four as described in claim 4, the load can be reduced as compared with the conventional eight blades, so that the power consumption of the drive motor (6) is reduced or It is also possible to downsize the drive motor (6) itself. Also, since the number of consumables is reduced, the labor for replacement can be reduced.

In order to support and fix the inflow pipe (3) to the cover (5) installed so as not to scatter the abrasive material to the outside when the blade (2) is projected as in claim 5. A flange (4) is provided, and a plurality of elongated hole-shaped mounting holes (41) are formed in the flange (4) to rotate the flange (4) by hand from the outside of the cover (5). It is possible to adjust the movement of the entire projection range by an operation and an extremely simple structure.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an outline of an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a main part on a side surface side of the present embodiment.

FIG. 3 is an explanatory diagram showing a main part on a plane side of the present embodiment.

FIG. 4 is an explanatory diagram showing a relationship between a blade and a supply port of the present embodiment.

FIG. 5 is an explanatory diagram showing an outline of another embodiment.

FIG. 6 is an explanatory diagram showing a main part of a side surface of another embodiment.

FIG. 7 is an explanatory diagram showing various projection patterns.

FIG. 8 is an explanatory diagram showing a main part structure of a rotor disclosed in JP-A-11-316354.

[Explanation of symbols]

1 rotating plate Two blades 21 Projection surface 3 inflow pipe 31 Supply port 4 flange 41 Mounting hole 5 cover 6 drive motor 7 Wear resistant member L predetermined distance

Claims (5)

[Claims] 1. A rotary plate (1) rotated by a drive motor (6), a plurality of blades (2) attached to the rotary plate (1), and abrasives or the like supplied to the blades (2). A rotor for a blasting device, which comprises at least an inflow pipe (3) having a supply port (31), wherein the blade (2) is mounted at a predetermined distance (L) from the center of the rotating plate (1). And the tip of the inflow pipe (3) is disposed slightly apart from the center of the rotary plate (1) on the side where the blade (2) is attached, and the supply port (31)
A projection pattern changeable rotor for a blasting device, characterized in that the center of the blade is aligned with the center of the blade (2) in the width direction. 2. The minimum of the predetermined distance (L) is a length that does not contact the outer circumference of the inflow pipe (3) when the blade (2) rotates, and the maximum of the predetermined distance (L) is The blade has the same length as the half of the width of the blade (2) when it is attached to the outer periphery of the rotary plate (1), and the tip of the supply port (31) has the blade (2). 2. The rotor capable of changing a projection pattern for a blasting device according to claim 1, wherein the tip of the inflow pipe (3) is arranged so as to maintain a slight gap with the inner end of the rotor. 3. The projection surface (21) of the blade (2) has a U-shaped cross section, and an abrasion resistant member (7) is provided on the inner circumference of the projection surface (21). A rotor capable of changing a projection pattern for the blast device according to 1. 4. A rotor capable of changing a projection pattern for a blasting apparatus according to claim 1, wherein the number of the blades (2) is four. 5. A flange (6) for supporting and fixing the inflow pipe (3) to a cover (5) installed so as not to scatter abrasives or the like when projected by the blade (2). 4. The rotor capable of changing a projection pattern for a blasting device according to claim 1, further comprising: 4), wherein the flange (4) is provided with a plurality of elongated hole-like mounting holes (41).