JPH0159049B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The apparatus of the present invention is used for manufacturing heat exchanger tubes for supplying heat medium for various air-conditioning devices and equipment.

[Prior Art] The inventor previously developed a device for attaching pleated spiral fins to heat exchanger tubes, and the invention was published as Japanese Patent Publication No. 18146/1983.

In this device, a fin strip is forcibly drawn between the substrate and the guide plate, and the strip is wound spirally around the outer circumference of the tube, which is a heat transfer tube, to form the fin, and at the same time, radial folds are created on the fin. However, the guide plate for shirring has a special shape and is not necessarily easy to design, and the shirring is not always performed regularly in a predetermined pattern.

[Object of the present invention] The present invention provides an apparatus for manufacturing a heat transfer tube equipped with a pleated spiral fin that can easily and regularly form pleats on the fin by skillfully arranged rolls when the fin is spirally wound around the tube. I was able to provide it.

[Means of the present invention] In the heat exchanger tube manufacturing apparatus equipped with the pleated spiral fin according to the present invention, a passage consisting of a groove 3 through which the fin strip plate 11 is inserted is provided horizontally in the front part, and following this passage, the A concave surface 2 for gearing, which is further recessed than the rear inner surface of the passage, is also formed on the front surface, and a substrate 1 having a hole 4 for inserting a tube penetrated through this concave surface 2; A guide 6 plate is attached and has a circular arc portion 6a formed on its lower side that coincides with a part of the periphery of the tube insertion hole of the board, and the tube loosely inserted into the hole of the board is forced around its axis. In order to grip the tube gripping chuck 12 to be rotated and the starting end 11' of a strip plate inserted through the passage of the board, wound around the tube between the guide plate and the board, and pulled out to the front side of the guide plate. and a clamping device provided on the chuck, and a clamping device provided at the end of the strip passage, which is rotatable around an axis that intersects with the progression of the strip and is arranged in a zigzag shape with respect to the traveling line of the strip. Roller 19a, 1 for pleating
It has a structure in which a plurality of 9b and 19c are provided.

[Operation] The strip plate 11 inserted into the groove 3 of the substrate 1 is passed through a plurality of forming rollers 19a, 19b, 19c, and then the tube 1 is formed by the gearp 5 between the guide plate 6 and the substrate 1.
The starting end of the strip is wound around the guide plate and pulled out to the front of the guide plate, and is gripped by the clamp of the chuck 12, and the chuck is driven to rotate.

By doing this, the strip plate 11 is wound around the outside of the tube and pulled out to the front of the guide plate, and as the strip plate is wound around the tube, the substrate 1 is retreated along the guide and pulled out to the outside of the tube. A spiral fin is wrapped around.

Compressive force is applied to the inner periphery of the fin band plate 11 by forced winding around the tube, but in this device, before winding, the inner periphery of the band plate is compressed by a forming roller. The pleats are formed in advance. Therefore, the inner periphery of the strip is easily contracted, and the next winding around the tube at the gearp 5 is carried out without difficulty, thereby sequentially forming radial folds 11b that wave in the circumferential direction. , and a spirally curved fin 11a.

[Example] The present invention will be explained below based on embodiment figures.

As shown in FIG. 1, the device of the present invention includes a substrate 1 and a guide plate 6 rotatably attached to the substrate 1 with a hinge 8. It is fastened by
A gearp 5 is formed in the left half between the guide plate 6 and the substrate 1.

The substrate 1 has a concave left side part 2 which is one level lower than the right side part 1b, and the upper part of the right side part 1b is connected to the concave part 2 through which the fin band plate is inserted. That is, a passage groove 3 leading to the gearp 5 is provided horizontally.

Therefore, a hole 4 is formed at the boundary between the concave surface part 2 and the convex right side part, and the hole 4 is cut over the entire circumference or almost half of the circumference of the hole 4, if necessary. A pocket is formed.

Reference numeral 1c denotes an inclined surface portion that continues from the concave surface portion 2 to the protruding right side portion 1b, and is fan-shaped and further protrudes.

At the position of the groove 3 adjacent to the final end of the inclined surface portion 1c, a plurality of grooves protrude by a predetermined length in the width direction of the groove 3 and are arranged in a zigzag pattern alternately along the length direction of the groove 3. Rotatable pleat forming rollers 19a, 19b, 19c are provided,
These rollers are located in a recess 2 formed in a part of the groove 3.
Part of it is within 0. In addition, the reference numeral 33 in the same figure
is a concave portion formed on the inner surface of the guide plate 6 for escape of the formed roller 19b.

As shown in FIG. 3, the guide plate 6 is provided with a guide hole 26 that coincides with a part of the guide hole 27 of the substrate 1, and forms an arcuate edge 6a with a center angle of about 90° opposing the hole 4 of the substrate 1. It has been done.

Therefore, the strip plate 11 inserted into the groove 3 from the right side in FIGS. After being wound around the outer periphery of the guide plate 6, it can be pulled out to the outside of the front surface of the guide plate 6 along the convex surface 1c.

Reference numeral 12 denotes a chuck for rotating the tube 10 about its axis, and is provided with a clamp 13 for gripping the starting end 11' of the strip pulled out from the front of the guide plate. Since the configuration of this clamp is arbitrary, a detailed explanation will be omitted, but for example, as shown in the figure, a tapered rear surface 15a of a lock lever 15 is rotatably attached to the chuck 12 with a shaft 14.
The starting end 11 of the strip plate 11 can be clamped with the front face of a clamping piece 16 which is also fixed to the chuck 12.

Further, a guide rod 17 is loosely inserted between the substrate 1 and the guide plate 6, so that the substrate 1 can be guided by the guide rod and moved in the axial direction of the tube 10.

In addition, 18 in the figure is a rotational drive device.

Further, the feeding speed of the strip is appropriately set depending on the thickness and strength of the strip.

The fins 11a wound around the tube 10 in this manner are clamped from the outside with a pair of covers (not shown) having a semicircular cross section, and the inner peripheral edges of the starting and rear ends of the fins 11a are welded to the tube 10. By doing so, the fins 11a are fixed to the tube 10 to form a finned heat exchanger tube.

[Effect] As described above, according to the present invention, the pleated spiral fin is provided on the outside of the tube. Therefore, the inner circumference of the fin is reinforced by the pleats, and the fin is stronger than one without pleats. Heat exchanger tubes with large heat exchange area and good heat exchange efficiency,
It can be manufactured continuously, efficiently, and reasonably without compromising the strength of the strip.

[Brief explanation of drawings]

The figures show an embodiment of the present invention, in which Fig. 1 is a perspective view of the device, Fig. 2 is a plan view, Fig. 3 is a rear perspective view of the guide plate, and Fig. 4 is a left side view of the guide plate. ,
Fig. 5 is a perspective view of the board, and Fig. 6 is the − of Fig. 1.
An enlarged cross-sectional view of the line, and FIG. 7 is a front view of the heat exchanger tube. In the figure, 1...Substrate, 1a...Protruded upper side, 1b
...Protruded right side part, 2...Concave surface part, 3...Passway groove, 4...Hole, 5...Gearp, 6...Guide plate, 7...Spacer, 8...Hinge, 9...Clamp , 10...tube, 11...fin band plate, 11a...fin, 12...chuck, 13
... Clamp device, 14 ... Lock lever shaft, 1
5... Lock lever, 16... Clamping piece, 17...
Guide rod, 18...Rotary drive device, 19a, 19
b, 19c...Fold roller, 20...Roller mounting recess.

Claims (1)

[Claims] 1 A passage consisting of a groove 3 through which the fin band plate 11 is inserted is provided horizontally on the front part, and following this passage, there is a concave surface part 2 for gearing that is further recessed than the rear inner surface of the passage.
is also formed on the front part, and this concave part 2
A substrate 1 having a hole 4 for inserting a tube through it.
A guide plate 6 is attached to the front surface of the board 1 and has an arcuate portion 6a formed on its lower side that coincides with a part of the periphery of the tube insertion hole of the board, and a guide plate 6 that is loosely inserted into the hole of the board. a tube gripping chuck 12 that forcibly rotates the tube around its axis; and a band plate that is inserted from the passage in the board, wound around the tube between the guide plate and the board, and pulled out to the front of the guide plate. starting point 1
a clamping device provided on the chuck for gripping the chuck 1'; Folding rollers 19a, 19b, 19 arranged in a zigzag pattern
A heat exchanger tube manufacturing device equipped with a pleated spiral fin provided with a plurality of c.