JPS6310171Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for manufacturing a finch tube used as a heat exchanger for a boiler condenser, a turbine, or the like.

Conventionally, in finch tube manufacturing equipment, a method has been adopted in which a continuous spiral fin is wound around a tube. In order to improve the production capacity of fin fins using this method, the forming speed of fins,
An increase in the rotational speed of the tube is required.

However, there were many problems such as increasing the rotation of the tube at high speeds, causing vibrations, increasing the forming speed of the fins making it difficult to follow shape control, and further shortening the life of the grooving tool. .

An object of the present invention is to provide an apparatus that eliminates the above-mentioned drawbacks of the prior art and improves the production capacity of finch tubes without increasing the processing speed.

In short, the present invention has a conventional finch tube that is 1
Unlike the previous method, which was manufactured by winding a strip of spiral fins, the present invention is characterized in that two spiral fins are produced at the same time and are wound and fixed around the tube.

The present invention will be explained based on embodiments and with reference to the drawings.
FIG. 1 is a plan view of the main parts of the finch tube manufacturing apparatus according to the present invention, and FIG. 2 is a front view.

The fed strip 1 is cut into pieces at the same height by a pair of upper and lower cutting rolls 4 and 5 with steps.
The divided fin materials 2 and 3 are twisted by 90 degrees between cutting rolls 4 and 5 and guide rolls 6 and 7, and are further directed in a direction perpendicular to the axis of the tube 9 by the guide rolls 6 and 7.

The entrance guide 8 holds the fin materials 2 and 3 on the forming roll 1.
1 and the forming disc 13 and forming roll 12
This is for correctly guiding the molded disc 13 into the gap between the molded disc 13 and the molded disc 13. Forming rolls 11, 12 and forming disk 1
The fin materials 2 and 3 that have entered the gap 3 are formed so that the wall thickness becomes thinner toward the outer periphery, so that they become spiral fins 14 and 15. In this case, the two fin materials 2 and 3 are connected to the gap between the forming roll 11 and the forming disk 13, respectively.
Since each fin material is rolled separately between the fin material and the forming disk 13, each fin material can be reliably rolled into a desired shape.

The forming rolls 11 and 12 are driven at a constant speed,
The molding disk 13 is driven. In addition, molded disk 1
3 has sufficiently large inner and outer diameters to avoid interference with the bearings of the forming rolls 11 and 12.

The guide 22 is fixed, and two spiral grooves are bored in the inner surface of the semi-cylindrical shape, so that the guide 22 is guided to the outside of the forming roll 12 during one turn after the spiral fins 14 and 15 are formed. belongs to.

The tube 9 is rotated and sent in the axial direction by a transfer mechanism 10. As shown in FIG. 3 and FIG.
Form a spiral groove in the strip. guide roll 20,
21 is a spiral fin 1 inside this spiral groove.
4 and 15 are formed.

Next, caulking rolls 23, 24, and 25 are provided at points 120 degrees out of phase with respect to the axis of tube 9 from the above-mentioned grooving tools 18, 19 and guide rolls 20, 21, and as shown in FIG. Fins 16 and 17 are formed by pressing the inserted spiral fins 14 and 15 from the outside of the groove.

The grooving force by the grooving tools 18 and 19 is approximately 1/2 of the crimping force by the crimping rolls 23, 24, and 25.
It is. In order to prevent the tube 9 from deflecting due to these forces, the support roll 2 is placed in the position shown in FIG.
6, 27, and 28 are provided.

Since it has such a configuration, the fin materials 2 and 3 made by dividing one strip 1 are completely the same, so they are rolled into spiral fins 14,
15, it is completely the same, and a finch tube having two fins 16 and 17 is manufactured. Compared to conventional equipment, the rotational speed of the tube is exactly the same, and only the axial feed is doubled, which reduces the vibration of the tube 9 caused by the increased speed of conventional equipment, and the difficulty in controlling the shape of the fins. It is possible to solve all the problems such as the end of the life of the grooving tool.

When using this invention, new cutting rolls and forming discs are provided, grooving rolls and caulking rolls are added, and support rolls are provided to prevent deflection with respect to the axis of the tube for balance. There are some highly effective methods that provide the same manufacturing capacity without any hindrance.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the main parts of the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a grooved tool 18, 19, caulking rolls 23, 24, 25, and support roll 2.
3, 24, 25, FIG. 4 shows the grooving tools 18, 19 and the guide rolls 20, 21.
FIG. 5 shows the details of the caulking rolls 23, 2.
4.25 is a detailed diagram. 1... Band plate, 2, 3... Fin material, 4, 5...
Cutting roll, 6, 7... Guide roll, 8... Entrance guide, 9... Tube, 10... Transfer mechanism, 1
1, 12...Forming roll, 13...Forming disk, 1
4,15...Spiral fin, 16,17...
Fin, 18, 19...Grooving tool, 20, 21
...Guide roll, 22 ...Guide, 23,2
4, 25... Caulking roll, 26, 27, 28...
...Support roll.

Claims (1)

[Scope of utility model registration request] A cutting roll that divides a strip into two parts, and two fin materials that are made up of two rolls and one disc, and that are cut at a gap formed between each of the rolls and the disc. a rolling section that separately forms a spiral shape, a grooving roll that forms two spiral grooves on the outer surface of the tube that is fed while rotating, and a spiral fin that forms two spiral grooves in the groove formed by the grooving roll. a guide having two spiral grooves for guiding the fins; a caulking roll for fixing the fin inserted into the groove by the guide to the tube; and a grooving force applied by the grooving roll to the tube and the caulking. A finch tube manufacturing device comprising: a support roll that can be supported against the caulking force of the rolls.