JP4334133B2 - Tube manufacturing method - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a method for manufacturing a tube forming the tube plate by roll forming.
[0002]
[Prior art]
In general, heat exchangers that have tubes that circulate the medium and perform heat exchange of the medium by heat transmitted to the tubes are known. For example, heat exchangers such as radiators, condensers, and evaporators mounted on automobiles are known. ing.
[0003]
For example, capacitors mounted on automobiles have fins attached to flat tubes, cores are formed by alternately stacking tubes and fins, and the end of the tube is attached to the header tank with brazing material, etc. It is integrally molded.
[0004]
The tube used in such a heat exchanger is formed by bending a plate of aluminum or an aluminum alloy using, for example, a roll forming machine or the like, and the medium is distributed in order to improve the pressure resistance and heat transfer of the tube. It is the structure provided with the bead etc. which partition a flow path into plurality.
[0005]
[Problems to be solved by the invention]
In general, a tube for a heat exchanger is formed by bending a plate a plurality of times to form a bead or a joint, and joining them, etc., and a plurality of devices are used for each process such as bead formation. Yes.
[0006]
A tube formed by roll forming is cut into a predetermined length after predetermined roll forming is performed.
[0007]
However, there is a disadvantage that the tube is deformed, for example, it is crushed by the pressing force from the cutting blade during the cutting.
[0008]
Then, this invention was made | formed in view of such a problem, and it aims at providing the manufacturing method of the tube which can prevent the tube deformation | transformation at the time of cutting while manufacturing a tube efficiently.
[0009]
[Means for Solving the Problems]
The invention described in claim 1 of the present application includes a roll forming step in which a plate is roll-formed into a tube, and a cutting step in which the tube is cut into a predetermined length, and the roll forming step and the cutting step include In the method of manufacturing a tube continuously performed on a single plate, the cutting step includes a clamp that holds the tube continuously conveyed from the roll forming step, and a cutting blade that cuts the tube. The clamp and the cutting blade hold the tube with a clamp that moves at the same speed relative to the tube, and cut with a cutting blade that moves at the same speed relative to the tube , The clamp 210 is formed by combining a plurality of clamp members 211 and 211, and includes a holding portion 212 that holds the tube. A cutting blade insertion portion 213 communicating with the holding portion, and the holding portion 212 is a flat tubular hole penetrating in the longitudinal direction of the plate P, and is a recess provided on the opposing surface of the clamp member 211. The cutting blade insertion portion 213 is a hole that communicates with the holding portion 212 and penetrates in the width direction of the plate P, and is an opposing surface of the clamp member 211. In addition, the tube portion is formed by combining the groove portions provided so as to be orthogonal to the longitudinal direction of the concave portion of the holding portion 212, and the tube exhibits a flat shape whose width direction is substantially flat, and At least one of the ends in the width direction of the tube is formed by bending the plate, and the cutting blade 220 is formed by bending the plate of the tube in the width direction. A method for producing a tube al inserted, according to this structure, the tube is efficiently produced, the tube deformation during cutting is prevented.
[0010]
That is, the tube tends to be deformed by the pressing force from the cutting blade at the time of cutting. However, in the present invention, since the tube is cut while being held by the clamp, such inconvenience is avoided. In addition, since the tube is cut by moving the clamp and cutting blade at the same speed relative to the transported tube, it is possible to continuously perform a series of processing necessary for tube formation, and the tube efficiently. Is manufactured.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Specific examples of the present invention will be described in detail with reference to the following drawings.
[0015]
As shown in FIG. 1, the tube manufacturing apparatus 1 of this example includes a roll forming step in which a plate P is roll formed to form a tube, and a cutting step in which the tube is cut to a predetermined length.
[0016]
The roll forming step of this example is a step of forming the plate P into a predetermined shape by a roll forming apparatus equipped with a roll forming machine or the like, and the first roll forming that forms a bead for partitioning the medium flow path of the tube on the plate P. The apparatus 110, the second roll forming apparatus 120 for forming a joint portion at the end of the plate P, and the joint portion and the bead formed on the plate P are joined to form a flat tube, and sized so as to have a predetermined size. The third roll forming apparatus 130 is configured to be configured.
[0017]
The cutting process of this example is a process of cutting the plate P formed into a tube shape by the cutting device 200 into a predetermined length.
[0018]
Furthermore, the tube manufacturing apparatus 1 of this example includes a processing oil removing step for removing the applied processing oil for smooth roll forming and a flux applying step for applying a flux for improving brazing. I have. These steps are performed by the processing oil removing device 300 and the flux applying device 400, respectively.
[0019]
The plate P is a plate made of an aluminum alloy that constitutes a tube, and is wound around the coil 500 in a roll shape. The plate P sequentially drawn out from the coil 500 is applied with processing oil by a processing oil coating device 600, and the first roll forming device 110, the second roll forming device 120, the processing oil removing device 300, the flux applying device 400, The third roll forming device 130 and the cutting device 200 are successively conveyed by the conveying device 700 in this order, and predetermined processing is performed in each process to form a flat tubular tube shape.
[0020]
As shown in FIGS. 2 to 5, the cutting device 200 of this example includes a clamp 210 that holds the plate P and a cutting blade 220 that cuts the plate P held by the clamp 210.
[0021]
The clamp 210 of this example is composed of two clamp members 211 arranged opposite to each other. The two clamp members 211 are opened, and the plate P is held by sandwiching both surfaces of the plate P from the thickness direction of the plate P. The clamp 210 includes a holding part 212 that holds the plate P, and a cutting blade insertion part 213 that communicates with the holding part 212 (see FIG. 2 or FIG. 3).
[0022]
In this example, the clamp member 211 is a block-like member that is symmetrical to each other, and the holding portion 212 and the cutting blade insertion portion 213 are formed by combining them. The clamp member 211 is provided with moving means 214 for reciprocating the clamp 210. That is, the clamp 210 is moved by the moving means 214 at the same speed as the conveying speed of the plate P and holds the plate P. When the plate P is cut in this state, the holding of the plate P is released and a predetermined value is obtained. It is configured to return to the position (see FIG. 4).
[0023]
The holding portion 212 is a flat tubular hole penetrating in the longitudinal direction of the plate P, and is formed by combining the concave portions provided on the opposing surface of the clamp member 211 with each other.
[0024]
The cutting blade insertion portion 213 is a hole that communicates with the holding portion 212 and penetrates in the width direction of the plate P, and is perpendicular to the longitudinal direction of the concave portion of the holding portion 212 on the opposing surface of the clamp member 211. It is formed by combining the provided groove portions with each other.
[0025]
The cutting blade 220 of this example is a double-edged member provided with a tapered blade. Further, the cutting blade 220 is provided with moving means 221 for moving the cutting blade 220. That is, the cutting blade 220 is moved by the moving means 221 at the same speed as the conveying speed of the plate P, is lowered toward the cutting blade insertion portion 213, is inserted from above the cutting blade insertion portion 213 of the clamp 210, and is clamped 210. The plate P held in step is cut. Then, the cutting blade 220 is configured to lift and return to a predetermined position while the holding of the plate P by the clamp 210 is released (see FIG. 5).
[0026]
The plate P conveyed to the cutting device 200 is held by a clamp 210 at a predetermined position. Then, while the plate P is held by the clamp 210 and moves together with the clamp 210 and the cutting blade 220, the cutting blade 220 is inserted from above the cutting blade insertion portion 213 of the clamp 210 and cut to a predetermined length. The
[0027]
Further, when the length of the plate P from the cut end reaches a predetermined length, the plate P is held by the clamp 210.
[0028]
The plate P is conveyed from the third roll forming step so that the end in the width direction formed by bending the plate P is positioned upward. That is, the plate P is cut by inserting the cutting blade 220 from the end in the width direction formed by bending the plate P.
[0029]
According to such a configuration, when the plate P is cut, the plate P is cut while being held by the clamp, so that it is possible to avoid the disadvantage of being deformed by the pressing force from the cutting blade. Also, the clamp 210 and the cutting blade 220 are moved at the same speed as the conveying speed of the plate P by the moving means 214 and 221 provided respectively, and return to a predetermined position after cutting. Processing can be performed continuously, and a tube can be manufactured efficiently.
[0030]
As described above, according to the tube manufacturing method and the tube manufacturing apparatus of this example, the tube deformation at the time of cutting can be prevented, and the tube can be manufactured efficiently.
[0031]
【The invention's effect】
As described above, the invention described in the first claim of the present application includes a roll forming step of forming a plate into a tube by roll forming, and a cutting step of cutting the tube into a predetermined length, and the roll forming In the tube manufacturing method in which the step and the cutting step are continuously performed on a single plate, the cutting step includes cutting a clamp that holds a tube continuously conveyed from the roll forming step and the tube The clamp and the cutting blade hold the tube with a clamp that moves at the same speed relative to the tube, and the cutting blade that moves at the same speed as the tube. is intended to cut, the clamp 210, there is formed by coalescing a plurality of clamping members 211 and 211, holding the tube And a cutting blade insertion portion 213 communicating with the holding portion. The holding portion 212 is a flat tubular hole penetrating in the longitudinal direction of the plate P, and is opposed to the clamp member 211. The cutting blade insertion portion 213 is a hole that communicates with the holding portion 212 and penetrates in the width direction of the plate P, and is formed by combining the concave portions provided on the surface with each other. The tube is formed by combining grooves provided so as to be orthogonal to the longitudinal direction of the concave portion of the holding portion 212 on the opposing surface of the clamp member 211, and the tube is flat with a substantially flat width direction. And at least one of the end portions in the width direction of the tube is formed by bending the plate, and the cutting blade 220 folds the plate of the tube. A method for producing a tube inserted from Gaité consisting widthwise end portions, According to such a configuration, it is possible to the tube efficiently produced, it is possible to prevent the tube deformation during cutting.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram showing a tube manufacturing apparatus according to a specific example of the present invention.
FIG. 2 is a perspective view showing a cutting process according to a specific example of the present invention.
FIG. 3 is a perspective view showing a clamp according to a specific example of the present invention.
FIG. 4 is a schematic configuration diagram showing a cutting process according to a specific example of the present invention.
FIG. 5 is a schematic configuration diagram showing a cutting process according to a specific example of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Tube manufacturing apparatus 110 1st roll forming apparatus 120 2nd roll forming apparatus 130 3rd roll forming apparatus 200 Cutting apparatus 210 Clamp 211 Clamp member 212 Holding part 213 Cutting blade insertion part 214 Moving means 220 Cutting blade 221 Moving means 300 Processing Oil removing device 400 Flux coating device 500 Coil 600 Processing oil coating process 700 Conveying device P Plate

Claims (1)

A roll forming step of forming a plate into a tube by roll forming, and a cutting step of cutting the tube into a predetermined length,
In the tube manufacturing method in which the roll forming step and the cutting step are continuously performed on a single plate,
The cutting step includes a clamp for holding a tube continuously conveyed from the roll forming step and a cutting blade for cutting the tube,
The clamp and the cutting blade hold the tube with a clamp that moves at the same speed relative to the tube, and cut with a cutting blade that moves at the same speed relative to the tube ,
The clamp 210 is formed by combining a plurality of clamp members 211 and 211, and includes a holding part 212 that holds the tube, and a cutting blade insertion part 213 that communicates with the holding part.
The holding portion 212 is a flat tubular hole penetrating in the longitudinal direction of the plate P, and is formed by combining recesses provided on the opposing surface of the clamp member 211 with each other.
The cutting blade insertion portion 213 is a hole that communicates with the holding portion 212 and penetrates in the width direction of the plate P, and is formed in the longitudinal direction of the concave portion of the holding portion 212 on the opposing surface of the clamp member 211. Are formed by combining the grooves provided so as to be orthogonal to each other,
The tube has a flat shape with a substantially flat width direction, and at least one of the end portions in the width direction of the tube is formed by bending the plate.
The cutting blade 220 is inserted from the end in the width direction formed by bending the plate of the tube.

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