JPS6174238A - Manufacture of tubular bulb flare - Google Patents

Abstract

PURPOSE:To prevent any occurrence of flaws, decentering or thick areas are achieve improved accuracy of forming the flange of a tubular flare by combusting the gas on the contact surfaces of a rotating reamer and a rotating flare tube. CONSTITUTION:Formation of the flange of a tubular flare is performed while combusting the gas on the contact surfaces of a rotating reamer and a rotating flare tube A. For example, a single-hole Pian burner 4 is used as the flange- heating burner, the distance between the pointed end of the burner 4 and the end of the flare tube A is adjusted to 15-20mm and the hole diameter of the burner 4 is adjusted to 0.8-1.6mm. The burner 4 is directed toward the center of the flare tube A and positioned at an angle of within 10 deg. from the horizontal line. The angular section and the flange of the flare are formed while combusting the gas in such a manner as to locate 60-80% of the incomplete combustion flare in the hollow cylinder of the flare tube A.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an improvement in a method for manufacturing a tube flare.

[Conventional technology]

Currently, horizontal flare machines are commonly used as speeds increase. Conventionally, for example, as shown in Figure 1, posl is 77
Knee /L/, PO82 is preheating, PO33 and 4 are heating the angle part, PO35 is heating the angle part and flange part, PO35 is holding the temperature of the angle part, and PO37 is reaming. When manufacturing with such a manufacturing process, if the temperature range for processing adjustment is narrow and the temperature is low, scratches are likely to occur near (q-■)/('8) as shown in Figure 5. .

Also, if the temperature is high, as shown in Figure 6, eccentricity (q) and flesh temperature tend to occur on the outer periphery of the flange.One way to prevent this is to reduce the friction on the contact surface between the reamer pin and the flare. It is well known that sulfur dioxide gas or the like is mixed into the combustion gas in order to reduce the amount of combustion gas, and the product such as sulfur dioxide gas is used as a lubricant.

[Summary of the invention]

In view of these drawbacks, the present invention provides a method for manufacturing a bulb flare that can significantly reduce scratches and poor shape.

[Embodiments of the invention]

One method will be explained below. When the angle part and flange part of POS5 shown in Fig. 1 are heated, the flange part heating burner (2) and (3) shown in Fig. 2 become stronger.
(The temperature at the N end rises and the meat temperature is generated at the end. If this process is continued, eccentricity as shown in Fig. 6 (CI and the outer periphery of the flange become warm) is likely to occur. Also, the flange heating burner (21 ，(
31 As the flame weakens, the shape accuracy improves, but as shown in Figure 5 (
Q (Scratches are likely to occur near IX (g).

Of course, flare chives (5) with different materials (thickness, outer diameter, etc.), flare machine chucks with no protruding core, reamer cores and reamer surfaces may be used. However, one with poor accuracy is out of the question.

In order to eliminate the above drawbacks, the flange heating burner (3) (ficietel burner) shown in FIG. 2 is changed to a single-hole Bian burner (4) as shown in FIG. 3. This single hole pier/
The best distance between the tip of the burner (4) and the end of the flare tube (5) is about 15 to 20 inches. In addition, the hole diameter of the pian burner (4) is preferably φ0.8 to φ1.6 mm, and the burner (4) should be in the range of 10 degrees from the horizontal towards the center with respect to the flare tube (N). N-1
The theoretical air amount for complete combustion of 111,000"/Nra' is approximately 1
1.0'/rr? -Gas. When converted to oxygen, it becomes 11.0'X021 = 2.31'-O2. When this is assumed to be 100% combustion, the incomplete combustion flame with a combustion state of 60 to 80% enters the flare tube (N hollow tube).
) The incompletely combusted gas that has entered the tube continues to burn on the inner surface of the tube due to the heat that heats the flare angle plow and flange sections (B) and (C), resulting in Poa 6 and Poa 7 in Figure 1.
Furthermore, with Poa 7, during reamer forming, secondary air can be used to perform the forming process while maximizing combustion on the flared glass surface.

By using this method, the temperature difference between the bacteria inside the flange (inside the bacteria outside the flange) and the inside of the flange (C) is reduced, and the temperature of the reamed surface can be prevented from becoming low.

Therefore, there is no need to heat the flange more than necessary, and the scratches shown in Figures 5 (C1, CD) and (G), the eccentricity ρ) in Figure 6, and the buildup (B) on the flange are significantly reduced. Stable accuracy was obtained. Also, the same effect can be obtained by introducing the raw gas from the opposite side of the flare tube (5). The experimental results were as follows.

〔Effect of the invention〕

As explained above, according to the present invention, when forming the flange part of a tube flare, gas is burned at the contact surface between the reamer rotating nine times and the rotating flare tube, so that there are no scratches or eccentricity. This has the effect of preventing the occurrence of meat pockets and improving processing accuracy.

[Brief explanation of drawings]

FIG. 1 is a diagram illustrating the process of a flare processing machine, and FIG. 2 is a schematic diagram illustrating the arrangement of burners in the process of machining the angle portion and flange portion of a conventional flare. FIG. 3 is a schematic diagram for explaining the invention in comparison with FIG. 2, and FIG. 4 is a sectional view of the flare. FIGS. 5 and 6 are diagrams illustrating defective flare processing. In the figure, (1) is the angle heating burner, (2),
+3) is a heating burner for the flange part, (4) is a heating burner for the inner surface of the angle part, GA) is a flare tube, (uniform is the outer surface of the flange part, (C) is the inner surface of the flange part, and (D) is the angle part. The same reference numerals in the middle indicate the same or corresponding parts. Fig. 2 Fig. 3 Fig. 4 Fig. 5 Fig. 6

Claims (1)

[Claims] A method for manufacturing a tube flare, which is characterized in that, in the tube flare manufacturing process, gas is burned at the contact surface between a rotating reamer and a rotating flare tube during flanging of the tube flare.