JP6861993B2 - Jig and manufacturing method - Google Patents

Description

The present invention relates to a jig for manufacturing an impeller and a method for manufacturing an impeller.

A sirocco fan, which is a type of impeller, is composed of a set of face plates (side plates) and a large number of blade materials provided at intervals along the circumferential direction between the face plates. The usual manufacturing structure of sirocco fans is, for example, A.I. A structure in which a single plate is drawn by press working, B.I. A structure in which the blade material is fastened to the ring and the side plate is fastened, or C.I. The blade material is inserted into the ring, bent in one direction, and the bent portion is welded to ensure strength, and the face plate is welded.

A. ~ C. Like the structure, the manufacturing structure in which insertion and welding are performed has some points to be improved, such as complicated work and labor required because a plurality of steps are required.

In order to improve the above-mentioned improvements, Patent Document 1 proposes a method for manufacturing an impeller that does not require welding. In this manufacturing method, the impeller as shown in FIG. 1 is manufactured as follows. As shown in FIG. 4, the blade material 40 is inserted into the slit 32 of the support material 30, and as shown in FIGS. 7 to 9, the blade material 40-2 is inserted into the through hole 12 provided in the first face plate 10. The blade members 40 are fixed to the first face plate 10 by bending the two convex portions (outer peripheral protrusions) 43 and 44 along the plate surface. Then, as shown in FIGS. 10 and 11, the outer peripheral protrusion 31 of the slit 32 of the support member 30 is bent to close the slit 32, and the blade member 40 is fixed to the support member 30.

Although welding is not required in the above method, the two outer peripheral protrusions on the upper edge and the two outer peripheral protrusions on the lower edge are manually bent along the plate surface for one blade material. Need to be processed.

A conventional jig and method will be described as such a bending process instead of the manual work.

That is, it is a plate-shaped jig as shown in FIG. 19A, and the bending process is performed using the jig 600 having the tip portion formed in a tapered shape on both the front surface and the back surface. FIG. 19A is a perspective view, and FIG. 19B schematically shows a crushing state of the jig 600 when viewed from above. As shown in FIGS. 19A and 19B, a jig 600 is inserted between the two convex portions 43 and 44, and the jig 600 is obliquely centered on a vertical axis passing through the center in the width direction of the jig 600. By pushing down the inserted jig 600, a force in the opposite direction was applied to the two convex portions 43 and 44, and the two convex portions 43 and 44 were bent at the same time.

Japanese Unexamined Patent Publication No. 2015-151862

When the above-mentioned jig 600 is used, a plurality of jigs 600 or a large number of jigs 600 are placed between the plurality of two convex portions (outer peripheral protrusions) or all the two convex portions, respectively. Insert in the tilted state, and push in (bend) in that state. Therefore, the work requires skill and sharpening of nerves. Therefore, it is difficult and troublesome. Further, if the jig 600 is handled incorrectly, one or both of the outer peripheral protrusions cannot be bent from the root, the outer peripheral protrusions are twisted, and the blade material cannot be accurately fixed to the face plate.

The present invention has been made in view of the above circumstances, and in the manufacturing process of an impeller (fan) having a structure in which a blade material is attached to a face plate by bending, no skill is required and normal work is performed (cure). The purpose is to accurately fix the blade material to the face plate (only by moving the tool up and down).

In order to achieve the above object, the jig according to the present invention is
A jig used to manufacture fans
This jig forms one flat surface on one part of the main body and one inclined surface inclined in the axial direction from the other flat surface, and also forms the other flat surface on the other part of the main body. , From the other flat surface to the other inclined surface inclined in the axial direction,
The one inclined surface and the other inclined surface are arranged in a cross shape in the main body portion, and the intersection of the one inclined surface and the other inclined surface is the surface position of the one flat surface and the other flat surface. By being located in the more axial direction, a recess is provided between this surface position and the intersection.
In a state where a pair of outer peripheral protrusions formed at one end of the blade material of the fan is inserted into a through hole formed in the face plate of the fan, the one inclined surface is formed on one of the pair of outer peripheral protrusions. Pressing, the other inclined surface presses the other of the pair of outer peripheral protrusions in a direction opposite to the pressing direction of the one inclined surface.
It is characterized by that.

The inclination of the one inclined surface and the inclination of the other inclined surface may be substantially equal.

In order to achieve the above object, the manufacturing method according to the present invention
It is a method of manufacturing a fan using a jig.
The jig forms a flat surface on one side of the main body and a flat surface on the other side inclined in the axial direction from the flat surface. , From the other flat surface to the other inclined surface inclined in the axial direction,
The one inclined surface and the other inclined surface are arranged in a cross shape in the main body portion, and the intersection of the one inclined surface and the other inclined surface is the surface position of the one flat surface and the other flat surface. By being located in the more axial direction, a recess is provided between this surface position and the intersection.
An assembly step of assembling the fan by inserting a pair of outer peripheral protrusions formed at one end of the blade material of the fan into the through holes formed in the face plate of the fan.
The one inclined surface of the jig is pressed against one of the pair of outer peripheral protrusions protruding from the through hole, the other inclined surface is pressed against the other of the pair of outer peripheral protrusions, and the blade material is pressed. The first fixing step of fixing to the face plate and
including.

In the first fixing step, one of the pair of outer peripheral protrusions is bent along the surface of the face plate by pressing the one inclined surface, and the other of the pair of outer peripheral protrusions is bent by pressing the other inclined surface. It may be bent along the surface of the face plate and in the direction opposite to one of the pair of outer peripheral protrusions.

In the first fixing step, the one inclined surface of the jig presses against one of the pair of outer peripheral protrusions until the one inclined surface of the jig abuts on the face plate, and the other inclined surface presses the face plate. The other inclined surface may be pressed against the other of the pair of outer peripheral protrusions until the contact with the other.

In the first fixing step, the pair of outer peripheral protrusions of the blade material may be further pressed onto the face plate.

In the assembly step, the blade material may be inserted into the slit of the support material of the fan, and the pair of outer peripheral protrusions may be inserted into the through holes formed in the face plate.

Further, the outer peripheral protrusions formed between the slits and the notches provided alternately with the slits in the circumferential direction of the support member and formed from the outer edge to the inner edge of the support member are plasticized. A second fixing step of deforming and fixing the blade material inserted into the slit to the support material,
May include.

According to the present invention, in the manufacturing process of an impeller (fan) having a structure in which a blade material is attached to a face plate by bending, the blade material is accurately fixed to the face plate only by moving the jig up and down (easy operation). be able to.

It is a perspective view of the impeller according to the embodiment of this invention. It is a top view which shows the feather material which concerns on embodiment in an enlarged manner. It is a top view which shows the 1st face plate which concerns on embodiment. It is an assembly perspective view of the impeller according to the embodiment. It is a top view which shows the support material which concerns on embodiment. It is an enlarged perspective view of a part of the support material which concerns on embodiment. It is an enlarged perspective view which shows the state of the insertion state of the convex part at the time of fixing a blade material to a 1st face plate. It is an enlarged perspective view which shows the state after temporarily fixing a blade material to a 1st face plate. It is an enlarged perspective view which shows the state after fixing the blade material to the 1st face plate. It is an enlarged perspective view which shows the state at the time of fixing a blade material to a support material. It is an enlarged plan view which shows the state when the blade material is fixed to a support material. It is a perspective view which shows the jig which concerns on embodiment in an enlarged manner. (A) is a front view of the jig according to the embodiment, (b) is a side view of the jig according to the embodiment, and (c) is a plan view of the jig according to the embodiment. The perspective view required for explaining the method of manufacturing the jig according to the embodiment is shown in an enlarged manner. The perspective view required for explaining the method of manufacturing the jig according to the embodiment is shown in an enlarged manner. FIG. 5 is an enlarged perspective view showing a state in which a blade material is fixed to a first face plate using a jig according to an embodiment. (A) and (b) are diagrams schematically showing how the blade material is temporarily fixed to the first face plate using the jig according to the embodiment, and (a) is a diagram in which the jig of the present invention is pushed down. A side view of the convex portion to be intended, (b) is a view temporarily fixed by the jig of the present invention. (A) and (b) are diagrams schematically showing how the blade material is fixed to the first face plate by using the jig according to the embodiment. (A) is an enlarged perspective view showing a state when the blade material is temporarily fixed to the first face plate using another conventional jig, and (b) is a perspective view showing the state when the blade material is temporarily fixed to the first face plate. It is a top view which shows the state at the time of fixing to

Hereinafter, embodiments of the present invention will be described. The jig according to the embodiment is used for manufacturing an impeller having a structure in which a blade material is attached to a face plate by bending.

First, the impeller (fan) 1 to be manufactured will be described. The impeller 1 is made of metal and is used for a blower. This blower is, for example, a blower for high temperature blower, a blower for heating or cooling food, food, etc., and a blower for ventilation.

In the following description, an XYZ coordinate system including an X-axis, a Y-axis, and a Z-axis that are orthogonal to each other is used. In the present embodiment, the XY plane parallel to the X-axis and the Y-axis is a horizontal plane, and the Z-axis is an axis parallel to the vertical axis.

FIG. 1 is a perspective view of the impeller 1. The impeller 1 includes a first face plate 10, a second face plate 20 provided on the first face plate 10 at intervals, a support member 30 provided between the first face plate 10 and the second face plate 20, and a first face plate 1. A plurality of blade members 40 supported by the face plate 10, the second face plate 20, and the support member 30 are provided. The blade member 40 is a plate-shaped member having an arc-shaped side in the X direction (short direction). When the impeller 1 is viewed from the upper side of the paper, the impeller rotates counterclockwise (hereinafter, rotation direction B).

As shown in FIG. 2, a pair of convex portions (outer peripheral protrusions) 43 and 44 are formed on the upper edge of the blade member 40 so as to protrude from the upper edge. Since the roots of the convex portions 43 and 44 are thinner than the upper portions of the convex portions 43 and 44 (constricted, thin-walled shape, slit processing, etc.), the bending strength is weak. Therefore, when the upper portions of the convex portions 43 and 44 receive a force, the convex portions 43 and 44 bend from the root portion or the vicinity of the root portion.

A pair of convex portions (outer peripheral protrusions) 45, 46 are formed on the lower edge of the blade material 40 so as to protrude from the lower edge. Similar to the convex portions 43 and 44, the root portion of the convex portions 45 and 46 is thinner than the lower portion of the convex portions 45 and 46. Therefore, when the lower portions of the convex portions 45 and 46 receive a force, the convex portions 45 and 46 bend from the root portion or the vicinity of the root portion.

A stepped triangular central portion side notch 41 is formed slightly above the central portion on the outer edge of the blade member 40 on the right side of the paper surface in the longitudinal direction. A triangular notch 42 on the outer peripheral side is formed slightly above the central portion on the outer edge of the blade material 40 on the left side facing the paper surface in the longitudinal direction. The positions of the central notch 41 and the outer peripheral notch 42 in the Z-axis direction are the same. The central portion side notch 41 and the outer peripheral side notch 42 are notches converged from the outer edge of the blade member 40 in the confrontation direction (inward, toward the center, respectively).

As shown in FIG. 3, the first face plate 10 is a circular member having a circular opening 11 formed in the center thereof. A plurality of arcuate or linear through holes 12 are formed in the first face plate 10 along the outer edge. The convex portions 43 and 44 of the blade member 40 are inserted into the through hole 12. In the drawing, insertion and bending of one convex portion 43, 44 will be described.

The second face plate 20 has the same shape as the first face plate and has the same structure and function as the first face plate. As shown in FIG. 4, the second face plate 20 is a circular member having an opening 21 formed at the center thereof, and a plurality of through holes 22 are formed along the outer edge. The convex portions 45 and 46 of the blade member 40 are inserted into the through hole 22.

As shown in FIG. 5, the support member 30 is a circular member having a through hole 34a formed in the central portion. Four through holes 34b are formed around the through holes 34a. The impeller 1 is fixed to the tip of a rotating shaft of a motor (not shown) that rotates the impeller 1 via a hub (not shown), but the through hole 34b is for fixing the impeller 1 to the hub. It is a hole through which the screw of the car is passed.

The outer peripheral surface 30a of the support member 30 has an arcuate slit 32 having a different width (the entrance is wide and gradually narrowing) from the outer edge toward the center, and an arc-shaped slit 32 protruding in the rotation direction B. Approximately chevron-shaped notches 33, which are provided so as to be adjacent to each other and whose width narrows from the outer edge toward the center, are alternately formed. Further, a bendable outer peripheral protrusion 31 is formed between each slit 32 and the notch 33. By applying a force to the inner wall surface 39 of the notch 33, the outer peripheral protrusion 31 is plastically deformed. As a result, the width of the entrance of the slit 32 is narrowed.

As shown in FIG. 6, on the inner wall surface 38 on the side opposite to the rotation direction B, two semicircular convex portions 35 and 36 are formed in order toward the central portion. The convex portions 35 and 36 project toward the inner wall surface 37 on the rotation direction B side. The convex portions 35 and 36 have a semicircular shape in order to facilitate the insertion of the blade member 40, which will be described later, into the slit 32. The distance between the tips of the protrusions 35 and 36 and the inner wall surface 37 is slightly narrower than the thickness of the blade material 40.

Next, a method of manufacturing the impeller 1 will be described. See FIG. First, the blade material 40 is inserted into the slit 32 of the support material 30. Specifically, the central side notch 41 of the blade material 40 is inserted through the opening of the slit 32 of the support material 30 until the innermost part of the central side notch 41 hits the innermost part of the slit 32. The blade material 40 is inserted toward the innermost part of the slit 32. Similarly, the remaining blade members 40 are sequentially inserted into the slits 32.

Next, the through hole 12 of the first face plate 10 is inserted into the convex portions 43 and 44 of the blade member 40 inserted into the support member 30. Insert one or more at the same time. As a result, as shown in FIG. 7, one convex portion 43, 44 protrudes from the upper surface of the first face plate 10 in one through hole 12. The insertion and the work in which the convex portions 43 and 44 project from the upper surface of the first face plate 10 individually or at the same time.

Subsequently, as shown in FIG. 8, by pushing down (pressing) the jig 100 according to the embodiment described later, the tip end portion of the convex portion 44 is moved in the rotation direction B along the upper surface of the first face plate 10. Temporarily bend toward. The convex portion 43 is temporarily bent in the direction opposite to the rotation direction B. Then, by pressing the other press jig 500 shown in FIG. 18B, the press jig 500 is bent and fixed as shown in FIG. In this work, the blade material 40 does not come off from the first face plate 10. Similarly, the convex portions 43 and 44 of the remaining blade material 40 are also bent along the first face plate 10. In this way, the blade member 40 is fixed to the first face plate 10 (first fixing step). Usually, a large number of jigs 100 and 500 are set in a press machine (not shown), and one jig is temporarily bent or fixedly bent. The number of large numbers is not limited.

The method of fixing the blade material 40 to the second face plate 20 is also the same. The through holes 22 of the second face plate 20 are inserted into the convex portions 45 and 46 of the blade material 40 from below (not shown), and the convex portions 45 are inserted. Is bent in the direction of rotation B, and the convex portion 46 is bent in the direction opposite to the direction of rotation B (not shown). As a result, the blade material 40 does not come off from the second face plate 20. Similarly, the convex portions 45 and 46 of the remaining blade material 40 are also bent along the second face plate 20. In this way, the blade member 40 is fixed to the second face plate 20 (first fixing step).

After that, in order to fix the blade member 40 to the support member 30, the entrance of the slit 32 is closed. As shown in FIGS. 10 and 11, the outer peripheral protrusion 31 is bent until the outer peripheral protrusion 31 enters the notch 42 on the outer peripheral side of the blade member 40. Therefore, the blade member 40 is fixed to the support member 30 (second fixing step). Similarly, the remaining outer peripheral protrusion 31 is bent toward the blade member 40.

By the above work, the blade member 40, the first face plate 10, the support member 30, and the second face plate 20 are integrated. The above is the conventional manufacturing method of the impeller 1.

In the jig according to the present embodiment, in the manufacturing process of the impeller 1 described above, the convex portions 43 and 44 of the blade material 40 are fixed to the first face plate 10, and the convex portions 45 and 46 are fixed to the second face plate. It is used in the step of fixing to 20 (first fixing step).

FIG. 12 shows the appearance of the jig 100 according to the embodiment. 13 (a) to 13 (c) show a front view, a side view, and a plan view of the jig 100. As shown in FIGS. 12 and 13, the side surfaces 101 and 103 of the main body 100-1 of the jig 100 are planes parallel to the YZ plane, respectively.

A flat surface 105a (one flat surface) and an inclined surface 101a (one inclined surface) extending from the flat surface 105a are formed in one portion of the main body portion 100-1. The inclined surface 101a is inclined at a predetermined angle with respect to the side surface 101, that is, the YZ plane. Further, a flat surface 105b (the other flat surface) and an inclined surface 103a (the other inclined surface) extending from the flat surface 105b are formed on the other portion of the main body portion 100-1. The inclined surface 103a is inclined at a predetermined angle with respect to the side surface 103, that is, with respect to the YZ plane.

As shown in FIGS. 13A to 13B, the flat surfaces 105a and 105b are surfaces parallel to the XZ plane. Further, the flat surfaces 105a and 105b are surfaces perpendicular to the side surfaces 101 and 103, that is, the YZ plane.

As shown in FIG. 13B, the inclined surfaces 101a and 103a are inclined by an angle θ with respect to the Z axis (axial direction). Therefore, when the jig 100 is viewed from the side surfaces 102 and 104, the side surfaces 102 and 104 have a substantially trapezoidal shape. The inclined surfaces 101a and 103a are formed so that their inclined directions are opposite to each other. Therefore, as shown in FIG. 13B, when the jig 100 is viewed from the side surface 104, the jig 100 is formed so as to have a shape (cross shape) in which the inclined surfaces 101a and 103a intersect. The position of the cross position 108 (intersection) where the inclined surfaces 101a and 103a intersect on the Y-axis (axial direction) is lower than the surface position of the flat surface 105a and the flat surface 105b on the Y-axis (axial direction). Therefore, a recess (recessed portion 107) is formed between the surface position of the flat surface 105a and the surface position of the flat surface 105b.

The jig 100 is manufactured by cutting, for example, a metal member M formed in a rectangular parallelepiped as shown in FIG. In the following description, a plane parallel to the YZ plane and the plane on the front side of the drawing is referred to as a side surface 101. When the metal member M is viewed from the positive direction of the Z axis, the side surfaces 102, 103, and 104 are clockwise from the side surface 101. A plane parallel to the XY plane, the plane on the upper side of the drawing is the side surface 105, and the surface facing the side surface 105 is the side surface 106. The jig 100 can also be formed by casting.

The metal member M is cut as follows. First, as shown in FIG. 14, half of one side of the side surface 101 (the right side toward the side surface 101; the side in contact with the side surface 104) is cut diagonally. At this time, the side surface 101 is cut so that the inclined surface 101a after being cut out has an angle θ with respect to the side surface 101. At this time, the side surface 105 is also scraped at the same time. The angle θ is determined so that a predetermined range of the side surface 101 remains and a predetermined range of the side surface 105 remains. The remaining surface (hatched portion) of the side surface 105 becomes the flat surface 105a. The reason why the predetermined range of the side surface 101 is left is for operability when the jig 100 is used, and the reason why the predetermined range of the side surface 105 is left is to maintain the strength of the jig 100.

FIG. 15 is an appearance of the metal member M in a state where the metal member M after being machined is rotated 180 degrees in the XZ plane. Similar to the side surface 101, one half of the side surface 103 facing the side surface 101 (the right side toward the side surface 103, the side in contact with the side surface 102) is cut diagonally. At this time, the side surface 103 is cut so that the inclined surface 103a after being cut out has an angle θ with respect to the side surface 103. At this time, the side surface 105 is also scraped at the same time. The remaining surface (hatched portion) of the side surface 105 becomes the flat surface 105b. The method of determining the angle θ is the same as when the above-mentioned side surface 101 is carved out. The above is the manufacturing method of the jig 100.

Next, the work of fixing the convex portions 43 and 44 of the blade member 40 to the first face plate 10 in the manufacturing process of the impeller 1 using the jig 100 will be described. The following work is performed, for example, by a worker in a factory using a press machine or the like.

First, as shown in FIG. 4, all the blade members 40 are inserted into the slits 32 of the support member 30. Next, the through hole 12 of the first face plate 10 is inserted into the convex portions 43 and 44 of the blade member 40 inserted into the support member 30. Therefore, as shown in FIG. 7, the convex portions 43 and 44 inserted into the through hole 12 project from the upper surface of the first face plate 10. In this state, as shown in FIG. 16, the flat surfaces 105a and 105b face the plate surface of the first surface plate 10 and are pressed against the convex portions 43 and 44.

The state in which the convex portions 43 and 44 are bent will be specifically described. 17 (a) and 17 (b) show a diagram schematically showing how the convex portions 43 and 44 bend when the convex portions 43 and 44 are viewed from the −X direction of FIG. 16 in the + X direction. .. As shown in FIG. 17A, the jig 100 is pressed against the convex portions 43 and 44 so that the two inclined surfaces 101a and 103a of the jig 100 are in contact with the convex portions 43 and 44, respectively. Therefore, as shown in FIG. 17B, the convex portions 43 and 44 bend along the inclined surfaces 101a and 103a of the jig 100. In this way, the protrusions 43 and 44 bend in opposite directions. At this time, the jig 100 may be pressed against the convex portions 43 and 44 until the flat surfaces 105a and 105b come into contact with the first surface plate 10.

Similarly, using the jig 100, the convex portions 43 and 44 of the remaining blade material 40 are also bent. Therefore, as shown in FIG. 18A, the convex portions 43 and 44 are in a state of being bent in opposite directions. After that, as shown in FIG. 18B, the convex portions 43 and 44 are bent in a substantially right angle direction by press molding using the jig 500, and the convex portions 43 and 44 are pressed against the upper surface of the first face plate 10. .. In this way, the convex portions 43 and 44 are fixed to the first face plate 10.

After that, the convex portions 43 and 44 of the blade material 40 are fixed to the second face plate 20 with the side fixed to the first face plate 10 facing down, and the work is the same as the above-mentioned work. By doing so, the convex portions 45 and 46 of the blade member 40 can be fixed to the second face plate 20.

By using the jig 100, a set of convex portions 43 and 44 can be bent at a certain angle at the same time, and one end of the blade member 40 can be temporarily fixed to the first face plate 10. The same applies to the temporary fixing of the convex portions 43 and 44 to the second face plate 20.

Further, by crushing the jig 600 diagonally using the conventional jig 600 shown in FIG. 19 (pushing down the jig 600 inserted diagonally), the convex portions 43 and 44 are twisted even if a force is evenly applied. Since it is bent in this way (the convex portions 43 and 44 bend while twisting), there is a possibility that the convex portions 43 and 44 will naturally twist. When the jig 100 of the present invention is used, the blade material 40 can be accurately fixed to the first face plate 10 and the second face plate 20 with only vertical movement and no twisting. Further, the jig 100 only needs to be pressed against the convex portions 43 and 44 until the side surface 105 of the jig 100 comes into contact with the surface of the first face plate 10 or the second face plate 20, and the work is easy. The same applies to the fixing of the convex portions 43 and 44 to the second face plate 20.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments.

The present invention is an invention capable of various embodiments and modifications without departing from the broad spirit and scope of the invention, and the above-described embodiments are for explaining the present invention. , The scope of the present invention is not limited. Therefore, the scope of the present invention is indicated not by the embodiment but by the claims. Then, various modifications made within the scope of the claims and the equivalent meaning of the invention are considered to be within the scope of the present invention.

1 Impeller 10 1st face plate 11 Opening 12 Through hole 20 2nd face plate 21 Opening 22 Through hole 30 Support material 30a Outer peripheral surface 31 Outer peripheral protrusion 32 Slit 33 Notch 34a, 34b Through hole 35, 36 Convex part 37, 38, 39 Inner wall surface 40 Feather material 41 Central side notch 42 Outer peripheral side notch 43, 44, 45, 46 Convex part 100, 500, 600 Jig 101, 102, 103, 104 Side surface 101a, 103a Inclined surface ( One sloped surface, the other sloped surface)
105a, 105b Flat surface (one flat surface, the other flat surface)
105, 106 surface 107 recess
108 Cross position M Metal member

Claims (8)

A jig used to manufacture fans
This jig forms one flat surface on one part of the main body and one inclined surface inclined in the axial direction from the other flat surface, and also forms the other flat surface on the other part of the main body. , From the other flat surface to the other inclined surface inclined in the axial direction,
The one inclined surface and the other inclined surface are arranged in a cross shape in the main body portion, and the intersection of the one inclined surface and the other inclined surface is the surface position of the one flat surface and the other flat surface. By being located in the more axial direction, a recess is provided between this surface position and the intersection.
In a state where a pair of outer peripheral protrusions formed at one end of the blade material of the fan is inserted into a through hole formed in the face plate of the fan, the one inclined surface is formed on one of the pair of outer peripheral protrusions. Pressing, the other inclined surface presses the other of the pair of outer peripheral protrusions in a direction opposite to the pressing direction of the one inclined surface.
A jig characterized by that. The inclination of the one inclined surface and the inclination of the other inclined surface are substantially equal.
The jig according to claim 1. It is a method of manufacturing a fan using a jig.
The jig forms a flat surface on one side of the main body and a flat surface on the other side inclined in the axial direction from the flat surface. , From the other flat surface to the other inclined surface inclined in the axial direction,
The one inclined surface and the other inclined surface are arranged in a cross shape in the main body portion, and the intersection of the one inclined surface and the other inclined surface is the surface position of the one flat surface and the other flat surface. By being located in the more axial direction, a recess is provided between this surface position and the intersection.
An assembly step of assembling the fan by inserting a pair of outer peripheral protrusions formed at one end of the blade material of the fan into the through holes formed in the face plate of the fan.
The one inclined surface of the jig is pressed against one of the pair of outer peripheral protrusions protruding from the through hole, the other inclined surface is pressed against the other of the pair of outer peripheral protrusions, and the blade material is pressed. The first fixing step of fixing to the face plate and
Manufacturing method including. In the first fixing step, one of the pair of outer peripheral protrusions is bent along the surface of the face plate by pressing the one inclined surface, and the other of the pair of outer peripheral protrusions is bent by pressing the other inclined surface. Bend along the surface of the face plate and in the direction opposite to one of the pair of outer peripheral protrusions.
The manufacturing method according to claim 3. In the first fixing step, the one inclined surface of the jig presses against one of the pair of outer peripheral protrusions until the one inclined surface of the jig abuts on the face plate, and the other inclined surface presses the face plate. Press the other inclined surface against the other of the pair of outer peripheral protrusions until it comes into contact with.
The manufacturing method according to claim 3 or 4. In the first fixing step, the pair of outer peripheral protrusions of the blade material is further pressed against the face plate.
The manufacturing method according to any one of claims 3 to 5. In the assembly step, the blade material is inserted into the slit of the support material of the fan, and the pair of outer peripheral protrusions are inserted into the through holes formed in the face plate.
The manufacturing method according to any one of claims 3 to 6. Further, the outer peripheral protrusions formed between the slits and the notches provided alternately with the slits in the circumferential direction of the support member and formed from the outer edge to the inner edge of the support member are plasticized. A second fixing step of deforming and fixing the blade material inserted into the slit to the support material,
7. The manufacturing method according to claim 7.

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