JP2001193689A - Air blower, and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the weight of an air blower heavy in weight because its side plate is caulked so as to be combined with plural vanes in case of a metal lic multi-fan, and reduce troubles caused by noise and the like. SOLUTION: A ciroccon fan is so manufactured that the outer circumferential parts, from which vanes are extruded, of plural vanes are cut off so as to be combined with the inner surface of a hollow cylinder while a reinforcing ring is being left as is at both the ends of an extruded product made out of a low melting point alloy, so that its central part is formed into an integral vane part so as to let a main plate be combined therewith.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-blade by forming a blower made of a metal and a metal such as an aluminum alloy or a magnesium alloy, which is a low melting point alloy, by extruding the metal and performing machining. And a method for manufacturing a blower such as a centrifugal fan or a cross flow fan.

[0002]

2. Description of the Related Art Metal sirocco fans are mainly used in kitchen applications where a fire is a problem and metal is required or when the ambient temperature is likely to be high. A plate or the like was used, and a main plate having a rotating shaft portion, a side plate of a suction side portion, and a plurality of blades were fixed by caulking or the like. In the configuration of the thin steel plate, parts become heavy, and balancing work is important. In addition, when a thin aluminum plate is used, material cost is required, and it is difficult to weld the reinforcing portion at the crimped portion. Since the connection of the caulked portion is weak, utility model registration No. 17927 is used as a technique related to continuous reinforcement by welding after welding, painting, use of an adhesive, and the like.
No. 36, Japanese Utility Model Application Laid-Open No. 62-14199, and Japanese Patent Application Laid-Open No. 8-424.
No. 95 is known.

[0003] The technology of a sirocco fan when integrally molded with plastic is disclosed in Japanese Patent Application Laid-Open No. 9-126189.
And Japanese Patent No. 2667748 are known. The configuration of the fan integrally formed of plastic resin will be described. This centrifugal blower has a blade portion configured by a main blade, an auxiliary blade, and a mortar-shaped reinforcing plate housed in a case and a bottom surface, and the blade portion is directly connected to a motor and rotates. Resin is injected into such a blade portion from a resin injection gate at a portion deviated from a shaft boss provided at the center in a cavity portion of the divided mold, and heat and temperature are applied to integrally mold the product. As a result, the main blades, auxiliary blades, and the like that become thin wings are also integrally formed. On the other hand, in a manufacturing method such as aluminum die-casting, it is difficult to form a wing-like structure having a thin thickness of 1-2 mm because a draft angle of a mold is large and a molten metal is difficult to flow.

However, it is difficult to reuse plastic resins, especially high-strength special plastic products mixed with glass fibers, such as fans, so that the use of mixed materials is stopped due to the problem of recycling as a measure against the global environment. Is being done. It is desired to use a metal having a low melting point rather than a combination of dissimilar metals that are difficult to separate even from a metal part or a metal that requires a lot of energy for production such as a steel plate. Regarding the thixomolding method of injection-molding a magnesium alloy, which is a typical example of a metal having a low melting point, see Nikkei Mechanical 1996.12.9, 495, Nikkei Mechanical 19988.3, 522, and Industrial Materials May 5, 1998.
The details are reported in the month issue (Vol. 46 No. 5) and the October 1998 issue (Vol. 46 No. 10).
The thixomolding method is technically difficult and requires high development costs without the development know-how of recent technology. Patents relating to a technique for integrally molding a sirocco fan by the thixomolding method include Japanese Patent Application No. 11-0555124 (Heisei 1).
(Filed on March 3, 2009).

[0005]

In a structure in which a thin steel plate or a thin aluminum plate is used and a main plate having a rotating shaft, a side plate on a suction side and a plurality of blades are fixed by caulking or the like, the number of blades is large. Therefore, there is a problem in that the weight becomes heavy, and a strength problem or a balancing work is required, and there are many irregularities such as caulking, and a rotating body generates a large wind noise and noise. In the case of using aluminum or plastic, the material cost is high, or the plastic which requires strength has a problem in recycling. Furthermore, as a method of manufacturing a multi-blade fan, a method of extruding an aluminum alloy and cutting the aluminum alloy has been proposed in Japanese Patent Application Laid-Open No. 51-133808.
Although it was proposed as in Japanese Patent Application Laid-Open Publication No. H10 (1995), it was not practically studied as a blower, and as described in this publication, the production was shifted to the production by the injection molding method of resin and the like, which was put into practical use. It was never done.

The present invention has been made to solve the above problems, and has as its object to obtain a practical blower having good performance using a metal such as an aluminum alloy or a magnesium alloy. In addition, the present invention provides a reliable technique for forming a fan by extruding a metal and performing machining to form an integral wing. Another object of the present invention is to provide a technique capable of easily manufacturing a complicated thin plate structure such as an airfoil with good quality at low cost.

[0007]

According to a first aspect of the present invention, there is provided a blower in which a plurality of blades are integrally connected to an outer peripheral portion forming a cylinder of low melting point metal and an inner surface of a hollow cylinder at the outer peripheral portion. An effective wing portion is provided with an integral wing portion exposed to the outer peripheral side, a disk-shaped main plate having a shaft portion coupled to the integral wing portion and rotationally driven by a motor at a central portion, and an effective outer diameter of the effective wing portion is provided. The dimensions are smaller than the inner surface of the cylinder.

In the blower according to the present invention, the connecting portion between the cylinder and the exposed outer peripheral portion of the blade is provided with a rounded shape or a size gradually changed.

In the blower according to the third aspect, a plurality of cylindrical portions forming the outer periphery are provided integrally with a large number of blades, and the cylindrical portions are provided at least near both ends.

According to a fourth aspect of the present invention, the integral wing portion and the main plate are made of the same metal material.

According to a fifth aspect of the present invention, the outer periphery of the main plate is joined so as to cover the outer periphery of the cylinder of the integral wing portion.

According to a sixth aspect of the present invention, the main plate joined to the integral wing portion is disposed adjacent to an effective blade width portion through which ventilation is performed.

According to a seventh aspect of the present invention, there is provided a blower including a disk-shaped main plate provided with a groove or a projection for fitting and coupling a plurality of blades of an integral blade portion.

In the blower according to the present invention, a large number of blades of the integral blade portion are formed by twisting, or the pitch between the blades is made unequal.

According to a ninth aspect of the present invention, in the blower, a cylinder is formed from a low melting point metal, and a large number of blades are integrally connected to an outer surface of the cylinder, and an effective blade width portion of the blade is exposed to the inner peripheral side. And a disc-shaped main plate having a shaft portion which is welded or bonded to the cylinder of the integral wing portion and which is rotatably driven by a motor at a central portion thereof, wherein the main plate is disposed adjacent to the effective blade width portion. It is.

According to a tenth aspect of the present invention, there is provided an air blower in which a plurality of cylinders are formed at the end and the center with metal, and a number of blades are integrally connected to the inner surface of the hollow cylinder at the outer circumference. A circle having an integral wing in which the effective wing portion of the wing is exposed on the outer peripheral side, and a shaft portion which is coupled to the integral wing portion near a cylindrical portion other than the end of the integral wing portion and which is rotationally driven by a motor in a central portion. And a plate-shaped main plate, wherein the outer diameter of the effective blade portion is smaller than the inner surface of the cylinder.

The blower according to the present invention uses an extruded product containing magnesium or aluminum as the metal material of the integral wing portion.

According to a twelfth aspect of the present invention, there is provided a method of manufacturing a blower, comprising: extruding a metal material to form a ring shape having a plurality of blades on an inner peripheral portion and a cylindrical portion on an outer peripheral portion; Exposing the wings to the width of the effective wings to form an integral wing, the outer diameter of the effective wings being smaller than the inner surface of the cylinder.

According to a thirteenth aspect of the present invention, there is provided a method for manufacturing a blower, comprising: extruding a low-melting metal into a ring shape having a plurality of blades on an inner peripheral portion to form a member; and cutting the outer peripheral cylindrical portion of the member. And a step of exposing a predetermined blade width. The length of the integral blade portion in the axial direction during cutting and the dimensions of the exposed blade width are memorized and continuously manufactured.

According to a fourteenth aspect of the present invention, there is provided a method for manufacturing a blower, comprising: extruding a low-melting metal into a ring shape having a plurality of blades on an inner peripheral portion to form a member; and cutting the outer peripheral cylindrical portion of the member. The method includes a step of exposing a predetermined blade width, and a step of storing a plurality of dimensions for the exposed blade width and selecting the dimension at the time of cutting.

According to a fifteenth aspect of the present invention, there is provided a method for manufacturing a blower, comprising the step of cutting the outer diameter of the exposed blade to a predetermined size.

A method of manufacturing a blower according to claim 16 includes a step of blasting a cutting surface on the outer periphery of the wing portion of the integral wing portion formed by extrusion molding and cutting.

According to a seventeenth aspect of the present invention, there is provided a method for manufacturing a blower, wherein an outer peripheral portion forming a cylinder of metal, a large number of blades are integrally connected to the inner surface of a hollow cylinder at the outer peripheral portion, and the effective blade portion of the blade is formed at the outer periphery. The blades are provided so as to obtain predetermined performance in a blower including: an integral wing portion exposed to the side; and a disk-shaped main plate having a shaft portion coupled to the integral wing portion and rotatably driven by a motor at a central portion. The method includes a step of cutting in a direction in which the outer diameter decreases, and a step of blasting a cutting surface on the outer periphery of the wing portion of the integral wing portion.

According to the eighteenth aspect of the present invention, there is provided an air blower having a plurality of blades made of metal and a plurality of reinforcing rings integrally supporting the blades on the outer peripheral side. The method includes a step of cutting the outer diameter dimension to a set dimension and a step of blasting a cutting surface on the outer periphery of the wing portion of the integral wing portion.

According to a nineteenth aspect of the present invention, when cutting the outer periphery of the integral wing formed by extrusion molding and cutting, the blade is fitted to the inner peripheral side of the integral wing. Setting a fixed cutting jig and then cutting.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view of the structure of an impeller of a sirocco fan according to one embodiment of the present invention. The left figure is a front view, and the right figure is a side view. In the figure, reference numeral 2 denotes a plurality of cylindrical wings constituting the integral wing portion 1, reference numeral 3 denotes a reinforcing ring integrally supported at both ends of the wing 2 and supported from the outer periphery, and the wing 2 and the reinforcing ring 3 are integrally formed. For example, an aluminum extrusion is machined and manufactured. Reference numeral 4 denotes a disk-shaped main plate having a main plate flange portion 4a on an outer peripheral portion thereof. A boss hole 4c is provided at the center of the main plate 4, and the boss hole 4c of the main plate 4 is sandwiched on both sides of the boss hole 4c with a donut-shaped reinforcing washer 7, and the boss 5 having a rotary shaft hole 6 is caulked. ing. The integral wing 1 and the main plate 4 are connected such that the reinforcing ring 3 at one end of the wing 2 of the integral wing 1 is covered with a caulking 4b provided at the tip of a main plate flange 4a provided on the outer periphery of the main plate 4. Caulking.
2a is a blade leading edge located at the blade inner diameter portion, and 2b is a blade trailing edge located at the outer peripheral portion of the blade 2, that is, at the blade outer diameter portion. When the motor shaft is coupled to the shaft hole 6 and rotates in the configuration of the fan of FIG. 1, the integral wing portion 1 rotates to blow air from the inner diameter side to the outer diameter side. The shape of the wing can be freely selected depending on the shape of the extrusion mold, so mass production is easy, such as efficient curvature, combined use of forward and reverse rotation, unequally spaced blade pitch, and skew shape with shifted angle. Can be done.

L is the effective blade width, the blade is exposed on the outer peripheral side, and is the portion of the blower through which the wind actually passes. That is, the wing and the reinforcing ring are formed integrally except for the reinforcing ring portion forming one circle, but the portion where the wing is exposed has a smaller diameter than the inner surface of the reinforcing ring. As the integral wing 1 rotates, air is sucked in from the air suction side opposite to the main plate 4 supporting the rotary shaft hole 6 connected to the direct connection shaft, and is blown out from the dimension of the effective blade width to the outer peripheral side. The axial position of the main plate attached to the inner diameter side is provided so as not to enter the effective blade width and as close as possible to the flow of the wind, thereby utilizing the flow of the wind to increase the fan efficiency. After the washer 7 sandwiching the main plate is fitted into the boss hole portion, the tip of the boss portion 5 is deformed by pressing from one side of the boss portion 5 so that the boss portion and the main plate are firmly and integrally crimped. You can do it.

Next, a method of manufacturing the integral wing will be described with reference to FIGS. FIG. 2 is a flowchart illustrating extrusion molding, FIG. 3 is a diagram illustrating members before machining the integral wing, FIG. 4 is a flowchart illustrating fan manufacturing, FIG.
6 is a perspective view for explaining the processing jig, FIG. 6 is a view for explaining the integral wing, the left figure is a front view, the right figure is a side view, and FIG. 7 is an explanatory view after processing the integral wing. Step 1 in FIG.
An ingot of an aluminum alloy is manufactured by melting and casting at step 2, and the ingot is uniformly processed and grounded at step 2, heated at step 3, and extruded at step 4 to form the aluminum alloy into a desired shape. Extruded. FIG. 3 shows the shape of the extruded aluminum alloy member.
For example, it is manufactured by extrusion of aluminum. The cylindrical extrusion ring portion 9 which is long in the axial direction has the same outer diameter as the outer diameter of the reinforcing ring 3 supporting the outer peripheral portion of the blade,
The inner diameter is the same as the inner diameter of the reinforcing ring 3. Here, the inner diameter of the reinforcing ring 3 is slightly larger than the outer diameter of the finally processed blade. This dimension is, for example, about 1 mm.

As shown in FIG. 3 and FIG.
Reference numeral 0 denotes an outer diameter portion of the blade, that is, a trailing edge portion 2b of the blade, is connected to an inner diameter portion of the extrusion ring portion 9, and the connection portion has a connection roundness 11 when formed by a mold. The connecting roundness 11 is located on the outer peripheral portion of the blade outer diameter. When the outer peripheral portion of the extrusion ring portion 9 is cut and the outer diameter is machined to the outer diameter of the blade, the wing portion 2 appears from the extrusion ring portion 9 and the coupling roundness 11 disappears. The roundness 11 remains at the portion where the outer peripheral portion of the blade and the reinforcing ring 3 are connected to each other, so that it is possible to obtain good and efficient air blowing without affecting the blown air, and further, the outer peripheral portion of the blade 2, that is, outside the blade. Wing trailing edge 2 located at the radius
The connection between b and the reinforcing ring 3 is strengthened, and the formability during extrusion is also improved. The leading edge 2a of the blade located at the inner diameter of the blade is rounded. For example, in the case of a conventional blade made of a thin steel plate and formed by caulking, since this end face is a cut surface of the steel plate and has no roundness, noise can be reduced and efficiency can be improved as compared with these blades. Also, by utilizing the dimensional difference between the outer diameter and inner diameter of the reinforcing ring 3 and the outer diameter of the blade, the rounding is performed from the reinforcing ring 3 to the trailing edge 2b located at the outer diameter of the blade by processing as described later. And curvature to improve the strength against rotation.

Although it is possible for the blade integrally formed of resin to have a rounded front edge portion 2a, the blade shape on the axial side of the blade is smaller than the blade shape on the suction side because of the draft angle with the mold on the axial side of the blade. On the main plate side, the thickness of the wings is increased. In the example of the present embodiment, the extruded product of metal and the integral wing portion have exactly the same shape in the axial direction, so that the characteristics do not deteriorate due to the thicker wing shape, and good characteristics can be obtained. Since it is made of metal, it can be used even in an environment where it is necessary to be made of metal for use in an atmosphere at a high operating temperature or for fire prevention. In addition, the fan can be rotated at high speed with high strength, and the range of use can be expanded to large and high capacity fans. FIG. 4 is a flowchart for explaining the manufacture of the fan. Step 11 is a step of cutting the cylindrical extrusion ring portion 9 of the extrusion blade portion 10 shown in FIG. 3 which is long in the axial direction into individual fan lengths. It is a step of assembling an extrusion ring portion processing jig in which the processing jig shown in FIG. 5 is inserted into the inside diameter side of a member cut into individual lengths. FIG. 5 is a perspective view of the processing jig. The processing jig 12 shown in the figure is inserted into the inner surface of the extrusion wing 10, and the machine is in a state where the wing 2 is set in the wing groove 13 of the processing jig 12. Since the wing portion 2 is not deformed by the force applied at the time of machining, machining can be performed with very high precision and at high speed. The outer diameter of the jig 12 is slightly smaller than the outer diameter of the blade to be machined.
mm enables good machining. Further, since the processing jig shaft hole 14 is provided at the center of the processing jig 12, the center of the shaft at the time of processing is easily obtained. When the outer diameter of the blade is small, such a processing jig is not required. For example, a jig having a slightly smaller outer diameter at the inner diameter of the blade and capable of adjusting the outer diameter. Insertion and fixing to the inner diameter of the blade enable cutting.

Step 13 is a step of cutting the ring portion 9 which is the outer periphery of the extrusion blade portion 10 except for the reinforcing ring 3 to complete the wing portion. FIG. 7 shows the shape after this processing. FIG. 7 is a view for explaining the integral wing portion 1. When machining the wing trailing edge portion 2b of the outer diameter portion of the blade, the cutting bit is fixed and the pushing wing portion 10 is rotated in the direction opposite to the arrow in the figure.
That is, cutting is performed in the direction of the arrow in the figure. Burrs 21 are generated at the end of cutting of the cutting tool. If this is reversed, the cutting waste enters between the blades, making cutting impossible.
The burr 21 can be easily removed by colliding small particles called blasting at a high speed. The direction of the arrow is opposite to the curvature of the wing groove 13 of the jig 12 in FIG. 5, that is, the wing groove is on the opposite side to the direction in which the pushing wing 10 is rotated from the jig surface at a right angle to rotate the wing 10 in the direction of the arrow in the figure. It opens to face. This is to prevent that when the rotation direction and the direction of the blade groove are inclined in the same direction, a part of the processing waste is caught in the groove and cannot be cut. In other words, a jig for fixing the wing is used for high-speed machining in the cutting process that removes the outer periphery of the cylinder and exposes the wing. In the range of the smaller effective blade width, the blade is partially cut. At this time, the jig that fixed the wings appears, and the cutting waste is easily collected by the jig and easily enters the groove. This is remarkable when the speed is increased, and the direction of the blade groove is set to the direction opposite to the direction in which burrs are generated on the cutting tool and the workpiece so as not to enter between blades. Step 14 is a step of assembling the wing portion and the main plate by assembling them, and Step 15 is a step of performing a finishing process. Here, the integral wing 1 shown in FIG. 1 is obtained by machining an extruded product, so that the accuracy is very high. The material is an aluminum alloy or a magnesium alloy, and the reinforcing ring and the wing are integrated. Due to the structure, the strength is strong and light, and the rotational balance is improved.

FIGS. 8 and 9 show the relationship between the reinforcing ring 3 and the blade 2 of the integral wing. FIG. 8 shows an example in which the difference between the inner diameter of the reinforcing ring and the outer diameter of the blade is small, and FIG. This is an example in which the outer diameter of the blade is made smaller due to characteristics such as a large air volume and wind pressure.
As shown in FIGS. 2 and 4, a low-melting-point metal is extruded by a simple and mass-produced method, and
By high-speed cutting using a jig that holds down dimensions and shapes,
A blower that can freely select an effective blade width and a fan outer diameter can be easily and mass-produced.

Embodiment 2 FIG. FIGS. 10 and 11 show explanatory views of the structure of an impeller of a sirocco fan according to another embodiment of the present invention, wherein 8 is an auxiliary reinforcing ring, and 15 is a cut roundness. The left view in FIG. 10 is a front view, and the right view is a side view. Explaining only the differences from FIG. 1, reference numeral 8 denotes an auxiliary reinforcing ring which is provided substantially at the center of the reinforcing ring 3 provided at both ends of the integral wing 1. Here, since the reinforcing rings 3 are formed in the same shape at both ends of the integral wing portion 1, the rotation direction of the blade can be configured to be opposite depending on which end face is connected to the main plate 4, This figure differs from FIG. 1 in the direction of rotation. The connection between the integral wing 1 and the main plate 4 is as follows.
In FIG. 1, caulking 4b formed at the tip of a main plate flange 4a provided on the outer peripheral portion of the main plate 4 is caulked so as to cover the reinforcing ring 3 at one end of the wing 2 of the integral wing 1. Does not have the caulking 4b at the tip of the main plate flange 4a, and the bonding is performed by bonding.
In the case of caulking, a caulking jig is required, and when the blade is small, the shaft hole 6 and the outer diameter of the blade may be slightly eccentric due to the force applied when caulking. There is no. However, when the blades become large to some extent, caulking is more suitable in view of the cost of the adhesive and the bonding time.

FIG. 11 is a perspective view of the integral wing 1 of FIG.
5 is the roundness of cutting. If a cutting tool having a rounded end face is used when the outer peripheral portion of the blade is subjected to the cutting process, the cutting roundness can be easily formed. The roundness of this portion can be easily configured, for example, when resin-molding the single suction blade. In addition, the main plate can be easily attached to the position of the reinforcing ring as described later, but if the reinforcing ring and the wing are not integrally formed by merely sliding the mold in the axial direction, for example, In the case of the suction blade, the outer peripheral surface of the blade becomes a slide core and cannot be configured due to the configuration of the mold. However, when it is formed later by machining as in the present invention, it can be configured very easily,
The connection between the wing 2 and the reinforcing ring 3 becomes very strong in combination with the connection roundness 11 described above. Thus, FIG. 10, FIG.
As described in 1, the reinforcing ring 3 and the auxiliary reinforcing ring 8 can be freely selected by the metal fan without being limited by the axial position, the number of 2, 3 or the width of the reinforcing ring. The fan can be rotated without deformation even if the centrifugal force increases like a fan used at high speed or high speed, and the balance can be easily adjusted, and the rigidity of the fan can be easily changed. The abnormal sound generated due to the relationship can be easily avoided. FIG. 12 is an explanatory diagram of the structure of an impeller of a sirocco fan according to another embodiment of the present invention. The left diagram is a front view, and the right diagram is a side view. Explaining only the differences from FIG. 1, the integral wing portion 1 is the same, but the main plate 4 is formed integrally with the boss portion 5 by a low melting point metal such as an aluminum alloy or a magnesium alloy. The connection between the integral wing 1 and the main plate is shown in FIG.
As in the case of No. 0, the bonding is performed. By reducing the number of joints, a blower that is easier to assemble, and is strong and stable in quality can be obtained.

Embodiment 3 FIG. 13 to 17 show explanatory views of the structure of an impeller of a sirocco fan which is an example of another embodiment of the present invention. The left diagram in FIG. 13 is a front view, and the right diagram is a side view. is there. When only the differences from FIG. 1 are described, the major difference is the blade shape. In the above description, a sirocco fan that sucks in from one direction, which is called a single suction blade, is called a double suction blade in this drawing. This is a sirocco fan that sucks in from two directions. This type of blade is used, for example, when processing a large air volume, and generally when manufacturing by caulking,
It is used when two single suction blades with different rotation directions are connected back to back and manufactured to process twice the air volume as in the case of the single suction blade. In addition, it is used when the suction space is diversified when it is used by being incorporated in equipment.

Here, the method of connecting the main plate 4 and the boss 5 is the same as that of FIG. 1, but the method of connecting the main plate 4 and the integral wing 1 is different from that of FIG. The outer diameter of the main plate 4 is larger than the inner diameter of the blade and smaller than the outer diameter of the blade.
Main plate blade groove 4d into which blade leading edge 2a located at the inner diameter of
The main plate blade groove 4d has a blade 2
Is provided with a chamfered portion 4e so as to be easily inserted. FIG.
The main plate 4 is joined to the wing portion 2 and the main plate wing groove 4d in such a manner that the wing leading edge 2a enters the inner rim of the auxiliary reinforcing ring 8 provided substantially at the center of the left and right reinforcing rings 3 as in the case of. Then, for example, the edge of the main plate blade groove 4d is pressed to reduce the width of the main plate blade groove, so that the main plate blade groove 4d is joined by caulking connection. Here, if the caulking directions of the main plate 4 and the boss portion 5 are reversed, a blade having a rotation direction opposite to that of FIG. 10 can be formed.

FIGS. 14 and 15 are perspective views of FIG. 13. FIG. 14 shows that the size between the reinforcing ring and the outer diameter of the blade is small and that the cutting radius 15 slightly extends from the reinforcing side surface. It is an example. FIG. 15 shows a fan in which the outer diameter of the blade is smaller than the diameter of the reinforcing ring. The strength is maintained by gradually changing the diameter with respect to the dimensional difference. FIG. 16 is a view for explaining the main plate structure. A main wing groove 4d into which the wing 2 is fitted and a chamfered portion 4e are provided so that the main plate 4 can be easily inserted even if it is inserted into the integral wing portion.

FIG. 17 is an explanatory view of the structure of an impeller of a sirocco fan which is an example of another embodiment of the present invention. In the description so far, the outer cylinder is provided on the inner periphery. The blade 2 is formed as an extruded blade portion 16 formed by extruding the outer periphery of the cylinder. The cutting process is performed from the inside of the cylinder, and the main plate is attached to the reinforcing ring 3 on the inner peripheral portion after the main plate is processed. To the extent that the welding is different, other structures, for example, the connection shape and manufacture of the wing 2 and the reinforcing ring 3 are the same as those described above, and the same effects can be obtained. In this case as well, an integral wing can be formed in the same manner as described above, but it is disadvantageous in strength as compared with the case where the reinforcing ring is located on the outer diameter side of the blade. That is, the force applied to the blade trailing edge 2b by regulating the blade leading edge 2a by the reinforcing ring 17 is greater than the force applied to the blade leading edge 2a by regulating the blade trailing edge 2b by the reinforcing ring 3. is there. However, in the case of aluminum extrusion molding, the shape shown in FIG. 17 is easier to mold, but it is much easier to machine the blade by fixing the blade inner diameter and cutting the blade outer diameter as described above. Since the shape shown in FIG. 17 is machined from the inside diameter side during machining, a jig as shown in FIG. 5 must be provided on the outer periphery side, so that the size becomes large, the accuracy is deteriorated, and the machining speed is slow. Become.

FIGS. 18 and 19 are views for explaining the mounting structure of the main plate 4 on which the boss portion 5 is mounted on the integral wing portion 1 described above. 4a is a main plate flange portion, and 4h is connected to the integral wing portion. The wing projections, 4f, are wing grooves fitted with the wings,
g is a reinforcing ring groove. FIG. 18 shows a mounting portion of the main plate structure provided at the end of the integral wing portion 1 as in the blower structure of FIG. 1. In order to further strengthen the caulking connection between the integral wing portion 1 and the main plate 4, A wing projection 4h that fits on the wing 2 that regulates the position in the rotation direction is provided in a portion of the flat portion that is located at the wing leading edge 2a of the integral wing 1. This projection can be easily formed by press working or the like. FIG. 19 shows a main plate structure corresponding to the blower of FIG. 12, and a wing groove 4f of the main plate 4 for further strengthening the connection between the integral wing 1 and the main plate 4.
And a reinforcing ring groove 4g. The main plate 4 and the integral wing portion 1 are firmly joined to fix the main plate 4 so that the wing 2 does not enter and deform the main plate. And a stable rotation can be obtained.
The caulking 4b of the main plate described in FIG. 1 has a tip bent toward the inner diameter side of the blade. This is a method in which a caulking portion is bent while rotating the main plate of the blade by contacting a rotating roller from the outer peripheral side of the blade. Do as follows. In the case of small ones, it is common to crimp as shown in Fig. 1 by pressing, but it is sufficient to select according to the size of the blade and the required strength. For example, when using a magnesium alloy, a two-part epoxy adhesive For example, a large fan that requires strength is joined by welding or a combination of welding and roll caulking is used.

Embodiment 4 FIG. In the present invention, when machining the cylinder on the outer peripheral side, it has been described that the outer peripheral portion of the blade is cut by machining so that the outer diameter of the exposed blade is smaller than the inner diameter of the ring to be removed from the extrusion member. The relationship between the outer diameter of the blade and the performance of the blower is shown in FIGS. FIG. 20 shows the ratio of the blade outer diameter changed by processing to the reference blade outer diameter on the horizontal axis. As described above, the effective blade width is a portion through which the wind actually passes when the blower rotates, and in FIG. 1, the portion indicated by reference numeral 2b excluding the reinforcing ring does not include the portion indicated by reference numeral 4b. The reference blade width indicates the effective blade width of the basic blade. For example, when the blade outer diameter is 180 mm and the blade width is 100 mm, a proportional value thereof is used as a reference, and in the case of the blade outer diameter Φ230, 100 mm × 230 mm /
180 mm = 128 mm is the reference blade width. The vertical axis is the ratio of the performance when processing the outer diameter to the performance at the reference blade outer diameter and changing the dimensions, and the airflow, static pressure,
The shaft power is described. One side from the ring diameter in FIG.
Assuming that the diameter reduced by about 1 mm in (radial dimension) is the reference dimension and the inner diameter of the blade is 80% of the outer diameter of the blade, for example,
When the outer diameter of the blade is processed to 95% of the reference size, the air volume and static pressure become 90% of the outer diameter ratio when the rotation speed is constant.
About. Further, the shaft power, that is, the output of the drive motor is the fourth power of the outer diameter ratio, which is about 81%. As described above, a fan having a different performance can be provided only by the cutting process of the outer diameter of the blade, so that if a part before the processing is prepared, a blower meeting the required specifications can be supplied immediately. Also, if the blower does not match the motor that matches the actual air flow for the product actually used in factories, etc., and the fan is used with wasted energy, the outer diameter is processed later to reduce energy. You can do it.

FIG. 21 shows the ratio of the blade width changed by processing to the reference blade width on the horizontal axis, and the ratio of the performance when the dimensions are changed by processing the blade width to the performance at the reference blade width on the vertical axis. And the air volume, static pressure and shaft power are described as performance characteristics. FIG. 21 shows an example in which only the blade width is changed. Assuming that the blade width is 90%, when the rotation speed is constant, the airflow and the shaft power are approximately 90% in proportion to the blade width. Static pressure does not change. When rotating a sirocco fan with a large induction motor,
The blade load increases and the motor slips, that is, (synchronous speed-actual rotation speed) / synchronous speed is referred to as the slip. If it becomes too large, for example, if this value exceeds 0.1, overload occurs and motor loss occurs. The temperature increases and the efficiency decreases. In such a case, countermeasures such as closing the outlet and applying a static pressure to reduce the blade load to reduce the shaft power are taken. However, in this method, the performance is reduced. The energy used can be minimized by adjusting the required performance according to the blade outer diameter and the blade width as in the example of this embodiment. That is, to reduce the shaft power, which is the blade load, by 10%, the blade outer diameter may be cut to 95% or the blade width may be reduced to 90%. When changing the blade width, it is necessary to adjust the positional relationship of the bell mouth, and it is necessary to provide a structure such as an elongated hole for sliding the blade surrounding casing structure of the blower. However, even if parts are prepared at the stage of aluminum extrusions,
Alternatively, it is natural that the same effect can be obtained even when the parts are prepared at the stage before the outer periphery processing.

Embodiment 5 FIG. FIGS. 22, 23, and 24 are diagrams illustrating an example of the line flow fan of the present invention.
While the sirocco fan has a structure that sucks in from the open inner periphery and blows out to the outer periphery, the line flow fan is a cross-flow fan, and both sides of the fan are closed by the main plate and are sucked from the outer periphery and are almost on the opposite side It has a configuration that blows out to the outer circumference. In FIG. 22, the left side is a sectional view taken along line XX, the right side is a side view, and 18 is a main plate B18 for blocking the opposite side of the main plate 4,
19 is a rotation axis. The structure is almost the same as the structure described with reference to FIG. FIG. 23 is a perspective view of the integral wing portion of FIG. 22, and employs an uneven pitch structure by changing the dimensions of the pitches P1 and P2 of the wing. Rotating noise can be reduced by changing the pitch of the entire wing. FIG. 24 is a perspective view of another embodiment of FIG.
It is a structure in which the wing is deformed obliquely in the longitudinal direction, that is, in the axial direction, with skew. The rotational noise can be reduced by adjusting the amount of this deformation. In the case of an extruded product, unequal pitch or skew of the blades can be more easily coped with by using a mold as in the case of selecting various types of blades. For example, if the grooves of the blades of the extrusion die are not straight in the axial direction but have a skew, the extruded molded product can be formed with the skew.

FIG. 25 is a flow chart showing an example of a procedure for manufacturing the blower of the present invention. Reference numeral 30 denotes a block manufactured by machining an extruded product using aluminum as a material into an integral wing, and reference numeral 31 denotes aluminum. A block for manufacturing a main plate by pressing a plate, 32 is a block for manufacturing a reinforcing washer, and 33 is a step for manufacturing a boss from an aluminum extruded product. Step 2
1 is a step of cutting the extrusion blade section 10 in the axial direction, Step 22 is a step of cutting the cut axial end face, and Step 23 is a step of cutting the extrusion blade section 10 in the axial direction.
Setting a processing jig on the inner periphery of the step, step 24
Is a step of cutting the outer periphery of the wing, step 25 is a step of blasting the processed integral wing 1 to remove burrs, etc., step 26 is a step of manufacturing a main plate, and step 27 is a step of pressing a reinforcing washer by pressing. Manufacturing and assembling with the main plate 4, step 28 is a step of connecting the integral wing 1 and the main plate 4, step 29 is a step of connecting the machined boss 5 to the main plate 4 to complete the entire blade of the blower, Step 30 is a step of judging the necessity of surface treatment, and if necessary, a step of treating the surface in Step 31, and Step 32 is a step of judging necessity of balance correction and performing a balance correction in Step 33 if necessary. Complete.

With this manufacturing procedure, a blower using the same metal can be mass-produced with stable quality in a short period of time for any multi-blade fan. In the drawing, the necessity of the surface treatment is determined by the type of the material to be used, the use environment, and the like, and the necessity of the balance correction is determined by the size of the fan, the rotation speed, the deformation amount by the coupling method, and the like. This flowchart is an example of the case of manufacturing a new blade as a new product, and it is easy to change the connecting procedure, or to store a partial part as a part and select a combination according to the order. Furthermore, using an NC machine that combines a chucking device and a belt conveyor for the machining of the block 30, the blade outer diameter and the blade width stored in the microcomputer in the device that controls the machining each time one item is machined. It can be processed continuously while changing the dimensions. When the required blowing characteristics are changed after the product is completed, or when the product is used for another purpose after use or for a different purpose, it is reused by using a part of the flow of FIG. It can be changed to a product applicable to etc. To do this, first, the covers and the like of the completed blower are removed, and the blades are removed from the directly connected motor as necessary. A jig for cutting is set on the inner peripheral side of the blade as in step 23, and after that, if necessary, processing such as cutting in step 24, blasting in step 25, and surface treatment in step 31 is performed. good.
As a result, it is possible to provide a blower that can freely cope with a change in specifications or a change to another use during use, can easily execute a plan for reducing energy consumption, and can solve environmental problems such as reuse.

As described above, according to the present invention, an extruded product such as an aluminum alloy or a magnesium alloy in which the outer periphery of a number of blades is joined to the inner surface of a hollow cylinder at the center is cut slightly longer than the effective width of the blade. In addition, leaving only the reinforcing ring on both ends, the outer periphery of the cylinder is cut until the wing comes out to the surface and becomes slightly smaller, and the wing part and the reinforcing ring part are integrally formed on one end face of the integral wing part A sirocco fan was constructed by connecting a disk-shaped main plate with a shaft driven by a motor at the center of the sirocco fan, so the wing is an extruded product. For example, the inner diameter of the wing can be rounded to reduce noise. In addition, since the integral wing is formed by cutting an extruded product, the blade width can be arbitrarily designed regardless of the mold. There is no need to make molds or manufacture jigs for swaging wings. Further, it is possible to manufacture a blade having the opposite rotation direction only by changing the surface of the integral wing portion that couples the main plate.
Since the wing is an extruded product, its shape such as the thickness of the wing is the same in the axial direction.For example, like the wing shape integrally molded with resin, the thickness of the main plate side is larger than that of the suction side due to the draft angle. The problem that the meat becomes meat and the characteristics deteriorate is eliminated. In addition, since the wing and the reinforcing ring are integrally molded, there is no joint like a swaged joining blade, so that a blade with extremely high strength and good dimensional accuracy can be made, and the necessity of balance correction can be greatly reduced. . In addition, since the integral wing can be manufactured by cutting an extruded product, the manufacturing can be easily rationalized by using, for example, an NC lathe. In addition, since the integral wing is an extruded product of an aluminum alloy, a magnesium alloy, or the like, it can be made much lighter than, for example, a caulking connection blade made of a steel plate and has excellent strength. Furthermore, since the integral wing portion is an extruded product of an aluminum alloy, a magnesium alloy, or the like, the cost of manufacturing a mold can be reduced as compared with a caulking combined blade.

Further, according to the present invention, the extruded product is formed by cutting and forming an integral wing portion, which is caulked to the outer peripheral portion of the main plate so as to cover the outer peripheral portion of the reinforcing ring at one end. Therefore, the integral wing portion and the main plate portion can be completely connected, and further, the strength of the main plate can be increased.

Further, according to the present invention, since the entire surface of one end of the integral wing portion and the contact portion of the main plate are bonded or welded together, the coupling between the integral wing portion and the main plate portion becomes very strong, and furthermore, the caulking connection is made. As described above, since a large force is not required at the time of connection, the dimensional accuracy of the connection is good.

Further, since the present invention has a reinforcing ring portion in addition to both ends of the integral wing portion, the connection between the wings can be performed at other than the both ends of the wing, so that the present invention has excellent strength, and can withstand high-speed rotation, for example. The structure can be freely selected.

Further, according to the present invention, the main plate and the shaft are integrally formed of a low melting point metal such as aluminum or magnesium, so that the thickness of the main plate can be freely designed. The strength can be greatly increased without the need for a high frequency, the natural frequency can be increased, and lightweight and high-speed rotation is possible. In addition, since it is made of a low melting point metal, recycling is easy. In addition, since the weight can be reduced and a large force is not required for handling, there is no problem that the user is required to carry around.

Further, according to the present invention, the integral inner wing portion, in which the wing portion and the reinforcing ring portion are integrally formed, is provided at the inner diameter portion of the wing at the central portion in the axial direction.
Since the outer peripheral portion of the disk-shaped main plate having the shaft portion driven and rotated by the motor is connected and configured, there is no need to connect and configure two sirocco fans as in the case of the caulking connection blade, and both suction sirocco fans are used. Can be very cheap.

Further, since the present invention has a structure in which the outer peripheral portion of the integral wing is joined to the outer peripheral portion of the disk-shaped main plate also has a reinforcing ring portion, the coupling between the integral wing portion and the main plate can be made more accurately and firmly. Can be.

Further, according to the present invention, the inner diameter of the reinforcing ring of the integral wing formed by cutting the extruded product is slightly larger than the outer diameter of the blade to be cut. The roundness is provided between the inner diameter of the reinforcing ring and the outer diameter of the blade at the connection between the inner diameter and the outer diameter of the blade (the trailing edge of the blade). Is good because it has no roundness and is not affected by ventilation.

Further, according to the present invention, since the connecting portion between the reinforcing ring portion of the integral wing portion formed by cutting the extruded product and the outer diameter portion of the blade to be cut is rounded, the reinforcing ring and the blade wing are provided. It is difficult for cracks and the like to enter from the joint part, and the joint becomes strong.

Further, according to the present invention, fine burrs on the cut surface can be completely removed by subjecting the cut surface on the outer periphery of the wing portion to blast processing, and injury at the time of cleaning can be prevented. In the case of painting, defects such as a coating film not reaching an edge portion are eliminated.

In the present invention, since the wing portion, the main plate, and the shaft portion are all made of the same metal, recycling becomes easy.

[0056]

According to the first aspect of the present invention, there is provided a blower having an outer peripheral portion forming a cylinder made of a low-melting-point metal and a plurality of blades integrally connected to the inner surface of a hollow cylinder at the outer peripheral portion. An integral wing part whose effective wing part is exposed to the outer peripheral side, and a disk-shaped main plate having a shaft part coupled to this integral wing part and rotationally driven by a motor in the center part, and the effective wing part outer diameter Is smaller than the inner surface of the cylinder, so that a product or the like according to specifications can be easily manufactured, and a blower of good quality and high performance such as reduction of noise can be obtained.

In the blower according to the second aspect of the present invention, the connection between the cylinder and the exposed outer periphery of the blade is rounded or gradually changed in size, so that the strength of the connection is high. A highly reliable blower can be obtained.

In the blower according to the third aspect of the present invention, a plurality of cylindrical portions forming the outer periphery are provided integrally with a large number of blades, and the cylindrical portions are provided at least near both ends. The configuration of the blower is easily obtained.

In the blower according to the fourth aspect of the present invention, since the integral wing portion and the main plate are made of the same metal material, a blower useful for protecting the global environment can be obtained.

In the blower according to the fifth aspect of the present invention, since the outer periphery of the main plate is joined so as to cover the outer periphery of the cylinder of the integral wing portion, the joint strength between the integral wing portion and the main plate is high and the reliability is high. A blower is obtained.

In the blower according to the present invention, since the main plate joined to the integral wing portion is disposed adjacent to the effective blade width portion through which the ventilation is performed, a blower having a small ventilation resistance and good performance can be obtained. can get.

The blower of the present invention according to claim 7 is provided with a disk-shaped main plate provided with a groove or a projection for fitting and coupling a plurality of blades of an integral wing portion. Blowers of various forms can be easily obtained with a strong structure.

The blower of the present invention according to claim 8 is formed by twisting a large number of wings of the integral wing portion, or by making the pitch between the wings unequal, so that the quality of the blower can be reduced. A good blower can be obtained.

According to the ninth aspect of the present invention, in the blower of the present invention, a cylinder is formed from a low melting point metal, and a large number of blades are integrally connected to the outer surface of the cylinder, and the effective blade width portion of the blade is located on the inner peripheral side. An exposed integral wing portion, and a disk-shaped main plate having a shaft portion that is welded or bonded to the cylinder of the integral wing portion and that is rotationally driven by a motor at the center portion, and is adjacent to the effective blade width portion. Since the main plate is arranged, a blower with good performance can be easily obtained.

The blower of the present invention according to claim 10 is the blower according to the present invention, wherein a plurality of cylinders are formed at the end and the center of the metal, and a number of blades are formed on the inner surface of the hollow cylinder at the outer periphery. The integral wing portion, which is integrally connected and the effective wing portion of the wing is exposed on the outer peripheral side, and is coupled with the integral wing portion near the cylindrical portion other than the end of the integral wing portion, and is rotationally driven to a central portion by a motor. And a disk-shaped main plate having a shaft portion, and the effective outer diameter of the blade portion is smaller than that of the inner surface of the cylinder.

In the blower according to the present invention, since an extruded product containing magnesium or aluminum is used as the metal material of the integral wing, a blower that is lightweight and can be easily recycled can be obtained easily and inexpensively. .

The method for manufacturing a blower according to the present invention according to claim 12 is a step of extruding a metal material to form a ring shape having a plurality of blades on an inner periphery and a cylindrical portion on an outer periphery. Removing the cylindrical portion to expose the blades to the width of the effective blade portion to form an integral wing portion, wherein the outer diameter of the effective blade portion is smaller than the inner surface of the cylinder. Can be simply and with low energy even afterwards.

According to a thirteenth aspect of the invention, there is provided a method for manufacturing a blower, comprising: extruding a low melting point metal into a ring shape having a plurality of blades on an inner peripheral portion to form a member; And exposing a predetermined blade width, and comprising: storing the axial length of the integral wing portion and the dimensions of the exposed blade width during cutting and manufacturing continuously, so that blowers of various dimensions can be manufactured. Easy mass production.

According to a fourteenth aspect of the present invention, there is provided a method for manufacturing a blower, comprising: extruding a low-melting metal into a ring shape having a plurality of blades on an inner peripheral portion to form a member; A step of exposing a predetermined blade width by cutting, and a step of storing a plurality of dimensions for the exposed blade width and selecting the same at the time of cutting, so that any blade can have a stable quality in a short period of time. It can be manufactured by

The method for manufacturing a blower according to the present invention according to claim 15 includes the step of cutting the outer diameter of the exposed blade to a predetermined size, so that there is no waste suitable for required blowing characteristics. You can get a blower at any time.

The method for producing a blower according to the present invention according to claim 16 includes a step of blasting a cutting surface on the outer periphery of the wing portion of the integral wing portion formed by extrusion molding and cutting. It is possible to easily prevent injuries and the like and troubles in post-processing, thereby obtaining a high-quality manufacturing method.

The method for manufacturing a blower according to the present invention according to claim 17 is a method for manufacturing a blower, comprising the steps of integrally connecting a plurality of blades to an inner peripheral surface of a hollow cylinder formed of metal, In an air blower having an integral wing part whose effective wing part is exposed on the outer peripheral side, and a disk-shaped main plate having a shaft part coupled to this integral wing part and rotationally driven by a motor at a central part,
A step of cutting the outer diameter of the blade in a direction to reduce the outer diameter of the blade so as to obtain a predetermined performance; and a step of blasting the cutting surface on the outer periphery of the wing portion of the integral wing portion. Even if there is no match, it is possible to match the wing with lean performance later, etc.
It is easy to use and can easily produce devices with low energy.

The method for manufacturing a blower of the present invention according to claim 18 is a method for manufacturing a blower, comprising: a plurality of metal blades and a plurality of reinforcing rings integrally supporting the blades on the outer peripheral side; The step of cutting the outer diameter of the wing or the outer diameter of the wing to the set dimension and the step of blasting the cutting surface on the outer periphery of the wing part of the integral wing part provide a stable blower that can solve environmental problems Easy to manufacture with good quality.

According to a nineteenth aspect of the present invention, in the method of manufacturing a blower according to the present invention, when the outer periphery of the wing portion of the integral wing portion formed by extrusion molding and cutting is cut, the wing is provided on the inner peripheral side of the integral wing portion. And a step of cutting after setting a cutting jig that fits and fixes them, so that high-precision and high-speed machining can be performed and a mass-production simple manufacturing method can be obtained.

[Brief description of the drawings]

FIG. 1 is a view of a sirocco fan according to an embodiment of the present invention, in which a left view is a front view and a right view is a side view.

FIG. 2 is a flowchart illustrating extrusion molding according to an embodiment of the present invention.

FIG. 3 is a perspective view showing a material before the integral wing according to the embodiment of the present invention is manufactured by machining.

FIG. 4 is a flowchart illustrating the manufacture of a fan according to an embodiment of the present invention.

FIG. 5 is a perspective view of a processing jig according to the embodiment of the present invention.

FIG. 6 is a diagram of an integral wing according to an embodiment of the present invention, wherein the left diagram is a front view and the right diagram is a side view.

FIG. 7 is an explanatory view after processing the integral wing according to the embodiment of the present invention.

FIG. 8 is a diagram showing a relationship between a reinforcing ring 3 and a blade 2 of an integral wing according to an embodiment of the present invention.

FIG. 9 is a diagram showing a relationship between a reinforcing ring 3 and a blade 2 of an integral wing according to an embodiment of the present invention.

FIG. 10 is an explanatory view of a structure of an impeller of a sirocco fan according to another embodiment of the present invention.

FIG. 11 is an explanatory view of a structure of an impeller of a sirocco fan according to another embodiment of the present invention.

FIG. 12 is an explanatory view of a structure of an impeller of a sirocco fan according to another embodiment of the present invention.

FIG. 13 is an explanatory view of a structure of an impeller of a sirocco fan according to another embodiment of the present invention.

FIG. 14 is an explanatory view of the structure of an impeller of a sirocco fan according to another embodiment of the present invention.

FIG. 15 is an explanatory view of a structure of an impeller of a sirocco fan according to another embodiment of the present invention.

FIG. 16 is an explanatory diagram of a main plate structure according to another embodiment of the present invention.

FIG. 17 is an explanatory view of a structure of an impeller of a sirocco fan according to another embodiment of the present invention.

FIG. 18 is an explanatory diagram of a main plate structure according to another embodiment of the present invention.

FIG. 19 is an explanatory diagram of a main plate structure according to another embodiment of the present invention.

FIG. 20 is a view for explaining the relationship between the outer diameter of a fan blade and the performance of a blower according to another embodiment of the present invention.

FIG. 21 is a diagram illustrating the relationship between the blade width dimension of the blade of the fan and the performance of the blower according to another embodiment of the present invention.

FIG. 22 is a diagram of a line flow fan according to still another embodiment of the present invention, wherein the left diagram is a front view and the right diagram is a side view.

FIG. 23 is an explanatory view of a structure after processing an integral wing portion of a line flow fan according to still another embodiment of the present invention.

FIG. 24 is an explanatory view of a structure after processing an integral wing of a line flow fan according to still another embodiment of the present invention.

FIG. 25 is a flowchart showing an example of a procedure for manufacturing a blower of the present invention.

[Explanation of symbols]

Reference Signs List 1 integral wing part, 2 wing part, 2a wing leading edge, 2b
Wing trailing edge, 2c wing root, 2d wing tip, 3
Reinforcement ring, 4 main plate, 4a main plate flange,
4b caulking hole, 4c boss part hole, 4d main plate wing groove, 4e chamfered part, 5 boss part, 6 rotary shaft hole,
7 Reinforcement ring, 8 Auxiliary reinforcement ring, 9 Extrusion ring part, 10 Extrusion blade part, 11 Connection roundness, 12 Processing jig, 13 Blade groove, 14 Processing jig shaft hole, 15 Cutting roundness, 18 Main plate B, 21 Burr.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yasuyuki Yokote 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Within Mitsui Electric Co., Ltd. (72) Inventor Hisashi Yokoya 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Inside Mitsubishi Electric Corporation (72) Inventor Yasu Makino 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation (72) Toshihiko Oshima 2-3-2 Marunouchi, Chiyoda-ku, Tokyo F term (reference) in Denki Co., Ltd. 3H033 AA02 BB02 BB06 CC01 DD04 DD13 DD17 DD25 DD26 EE00 EE06 EE11

Claims (19)

[Claims] 1. An outer peripheral portion which forms a cylinder with metal, and an integral wing portion in which a number of wings are integrally connected to an inner surface of a hollow cylinder of the outer peripheral portion and an effective wing portion of the wing is exposed to an outer peripheral side. A disk-shaped main plate having a shaft portion coupled to the integral wing portion and driven to rotate by a motor at a central portion, the outer diameter of the effective blade portion being smaller than the inner surface of the cylinder. Blower. 2. The blower according to claim 1, wherein the connection between the cylinder and the exposed outer periphery of the blade is rounded or gradually changed in size. 3. The blower according to claim 1, wherein a plurality of cylindrical portions forming an outer periphery are provided integrally with a large number of blades, and the cylindrical portions are provided at least near both ends. 4. The blower according to claim 1, wherein the integral wing portion and the main plate are made of the same metal material. 5. The blower according to claim 1, wherein the outer periphery of the main plate is joined so as to cover the outer periphery of the cylinder of the integral wing portion. 6. The blower according to claim 1, wherein the main plate joined to the integral wing portion is disposed adjacent to an effective blade width portion through which ventilation is performed. 7. A disk-shaped main plate provided with a groove or a projection for fitting and connecting a plurality of blades of an integral blade portion, according to at least one of claims 1 to 4. Blower. 8. The blower according to claim 1, wherein a number of blades of the integral blade portion are formed by twisting, or a pitch between the blades is made unequal. 9. A hollow cylinder formed of a low-melting-point metal, a plurality of blades are integrally connected to the outer surface of the cylinder, and an effective blade width portion of the blade is exposed to the inner peripheral side. A disk-shaped main plate having a shaft portion that is welded or adhesively bonded to the cylinder of the integral wing portion and that is rotationally driven by a motor at the center portion, and that the main plate is arranged adjacent to the effective blade width portion. Features blower. 10. An outer peripheral portion in which a plurality of cylinders are formed at ends and a central portion with metal, and a large number of blades are integrally connected to the inner surface of a hollow cylinder of the outer peripheral portion together with the cylinder, and effective blades of the blades are provided. A disk-shaped part having an integral wing part exposed to the outer peripheral side and a shaft part coupled to the integral wing part near a cylindrical part other than the end of the integral wing part and driven by a motor at the center part. And a main plate, wherein the outer diameter of the effective blade portion is smaller than the inner surface of the cylinder. 11. The blower according to claim 1, wherein an extruded product containing magnesium or aluminum is used as the metal material of the integral wing portion. 12. A step of extruding a metal material to form a ring shape having a plurality of blades on an inner peripheral portion and a cylindrical portion on an outer peripheral portion; Forming an integral wing by exposing it to a width, wherein the outer diameter of the effective blade is smaller than the inner surface of the cylinder. 13. A step of extruding a low-melting metal into a ring shape having a plurality of blades on an inner peripheral portion to form a member, and exposing a predetermined blade width by cutting an outer cylindrical portion of the member. And manufacturing the blower continuously by storing the axial length of the integral wing portion and the dimensions of the exposed blade width during the cutting. 14. A step of extruding a low-melting metal into a ring shape having a plurality of blades on an inner peripheral portion to form a member, and cutting the outer peripheral cylindrical portion of the member to expose a predetermined blade width. And a step of storing a plurality of dimensions for the exposed blade width and selecting dimensions during cutting. 15. The method for manufacturing a blower according to claim 12, further comprising the step of cutting the outer diameter of the exposed blade to a predetermined size. 16. At least one of claims 12 to 15, comprising a step of blasting a cutting surface on the outer periphery of the wing portion of the integral wing portion formed by extrusion molding and cutting. A method for producing the blower according to the above. 17. An outer peripheral portion that forms a cylinder with metal, and an integral wing portion in which a number of blades are integrally connected to the inner surface of a hollow cylinder of the outer peripheral portion and effective blade portions of the wings are exposed to the outer peripheral side. And a disc-shaped main plate having a shaft portion which is coupled to the integral wing portion and is rotatably driven by a motor at a central portion, in a direction in which the outer diameter of the blade is reduced so as to obtain predetermined performance. And a step of blasting the cutting surface on the outer periphery of the wing portion of the integral wing portion. 18. A dimension of an exposed blade width or an outer diameter dimension of an integral wing portion formed integrally with a plurality of metal wings and a plurality of reinforcing rings for supporting the wings on the outer peripheral side. A method for producing a blower, comprising: a step of cutting into a shape; and a step of blasting a cut surface on the outer periphery of the wing portion of the integral wing portion. 19. A cutting jig which fits and fixes a wing on the inner peripheral side of the integral wing when cutting the outer periphery of the integral wing formed by extrusion molding and cutting. The method for manufacturing a blower according to at least one of claims 12 to 18, further comprising the step of: setting and cutting.