JPS59212137A - Production of wing-shaped hollow vane - Google Patents

Abstract

PURPOSE:To produce an inexpensive wing-shaped hollow vane in short time with a small stage without requiring skilled operation by inserting one of shaping dies into a round steel pipe of a prescribed diameter cut to a prescribed width and pressing the same with a press machine. CONSTITUTION:A round steel pipe 10 is cut to a prescribed width and thereafter one 11a of a pair of male and female dies for shaping is inserted into the pipe 10 which is then placed on the bed 13 of a press machine. On the other hand, the other 11b of the dies for shaping is mounted on the bottom surface of the slide 14 of the machine 12. A slide 14 is descended downward in this state to press the round steel pipe 10 on the bed 13 so that the pipe is shaped to a desired wing shape by the dies 11a, 11b.

Description

[Detailed Description of the Invention] The present invention is an impeller (two blades used in centrifugal blast warfare, etc.).
ff+-Relates to a method for manufacturing airfoil-shaped airfoils 0.

Generally, the impeller used for centrifugal blowing, melting, etc.
+2. - and as shown in Figure 2 (1 disk-shaped main plate (1)
It is constructed by fixing a double number of blades (3) between the fan and the side plate (2).Specifically, these blades (3) increase the efficiency of the blower and reduce noise, thereby improving performance. At the same time, in order to increase rigidity and improve mechanical strength (a hollow airfoil as shown in Figure 1) is used.

By the way, the production of this airfoil mid-beam blade is as follows: (1) As shown in Fig. 3 of Pal 1 (2), from a flat iron plate (5a) to iron plates (3b) and (3c) of a predetermined size, !JJ
tL'te, C no % h no fl < board (ab),
(3c) are each bent to yield y4-shaped head 1 cyen 5 melons + 2
μ (3d) and rear streamlined part (3e) are manufactured, welded at all the bath contact parts to form an integral structure, and the 1m contact point (・let
Smooth due to grinder finish etc.
3) is manufactured.

Such a conventional method for manufacturing airfoil-shaped hollow blades (1)
Bending work (-Reducing the bending process and bending the tie-shaped head arc part (
3d) and the rear streamlined part (3e), the bath welding process to assemble them into one piece, and the grinding process, which requires a lot of cost. This had the disadvantage that it required one hour of labor and resulted in a 111111I blade.

The present invention requires skilled work and does not require skilled work.
The purpose of the present invention is to provide a method for manufacturing inexpensive stepped hollow blades in a timely manner.

The method for manufacturing airfoil-shaped hollow blades according to the present invention involves inserting one shaping mold into a round steel pipe, attaching the other shaping mold to a press machine (two holes), and then inserting the other shaping mold into a press machine. It is characterized by being manufactured by press molding using both shaped LI4 molds.

Hereinafter, one embodiment of the present invention will be described with reference to a manufacturing apparatus shown in FIGS. 4 and 5. That is, the airfoil-shaped hollow blade device according to the present invention (first of all, a round steel predecessor 0 of a predetermined diameter is used as the material for the bt-type mid-sight blade) is used. As the device, a press machine 02) with crab-shaped molds αla) and (llb) shown in FIGS. 4 and 5 is used. As shown in the figure, this press machine (2) has a bed (i fathom) on which legs (15) on both sides are placed (29-shaped steel gauge uO), and a slide (4) is installed above the bed. It is designed to be able to move up and down using hydraulic pressure.

Immediately, the airfoil-shaped hollow blades 3 are formed from a round steel tube (IQ) using two press machines.
After cutting l to a constant width, insert one (11a) of a pair of male and female shaping/i types into the steel hollow uQ, and insert the press acupuncture machine d bottle as shown in Figure 4 (2). Bed 0 up: leave.

On the other hand, 1j is placed on the lower surface of slide i1/d of press machine α2.
The other of the shaping molds described above (], 1b) is attached. In this state, press the special press 1bef+ shown in Figure 5.
λII 21 slide (1 (1)) is pushed down on the round wheel j on the bed (i3), and the orthopedic gold nia
(]-1a) + (llb) C'Iin'-μ's vd shape (two shapes. After shaping, press the press machine (1 slide (14) upward (2), then press the round shape steel (lt11
The circular shaping metal 11 is pulled out and the airfoil-shaped hollow blade (3) is slowly manufactured.

As described above, the uninvented manufacturing method involves inserting a Y-shaped blade into a round steel frame of a predetermined diameter cut by a predetermined width ζ,
After that, how to make a round ki fJ into a shaping mold? : Extruded with a press machine provided and made into Tokoro's 11 pieces.
Since the blades are manufactured, conventional processes such as bending, bamboo widening, and finishing with a grinder are required! IJ,4%j,'
) The effect is that it can be produced in a short time (2) at a low cost.

- Also, it can be manufactured by simple press work (2. Production IL)
:+';'&', f, l'J, etc. Skills are not required, and variations in product quality are eliminated by the work. Further (
2+lIlns (= <C+ since there is no tangent,
Increased rigidity makes this i! This has the effect of improving fJ' and l7 in the swept blade.

[Brief explanation of the drawing]

Figure 1 is a plan view showing the blade and IL, Figure 2 is Figure 111
-1 line along line n1] Figure 3 shows b used for impeller.
``Development 1J to explain the manufacturing process of closed-shaped hollow blades 4
j, r(:, 4νj and FIG. 5 are front views showing the state of the press machine before pressing and the state of the press machine used in the method for manufacturing airfoil-shaped hollow blades according to the present invention. 1... Soil plate 2. ...Side plate 3...Blade
3a to 3e... iron plate members 11a, llb
...Mold for distorted shape 12...Press machine I3...Bed 14...Slide 10...Round shape @ Government (s7aa) agent Patent attorney Yoshiaki Inomata (and 1 others)
name)=176-

Claims (1)

[Claims] Use a press machine that comes with a pair of male and female bellows molding tools to form a hollow blade in the specified airfoil shape, and cut it to the specified length.
A desired airfoil shape is created by inserting one of the round shaped molds into the pipe and pressing the two shaping molds with the other shaping mold. A method for manufacturing an airfoil-shaped hollow blade, characterized by manufacturing a hollow blade.