JPS5950421B2 - Pipe and fin assembly equipment - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to an apparatus for manufacturing ribbon-shaped fins in multiple rows, and a device for manufacturing ribbon-shaped fins in multiple rows, and a method for attaching the fins held by guide plates with wide intervals to one guide pin of a truck after cutting. This invention relates to a pipe and fin assembly device comprising a device for pushing the pipes one by one, and a device for inserting the pipes into holes in the guide pins of the fins stacked on a truck.

[Prior art] Conventional heat exchangers used in air conditioners, etc. are made by inserting multiple long U-shaped pipes into a large number of plate-shaped fins, then expanding the U-shaped pipes and fixing the fins. This is a cross-fin type heat exchanger that connects the long U-shaped pipes with U-shaped pipes.

In the conventional fin forming process shown in FIG. 1, an aluminum plate 1 is continuously fed into a press 2, a pipe insertion hole is formed in a mold 7 in the press, and the ribbon is cut into ribbons and sent out of the press. The device 3 holds the ribbon-like fins outside the device and cuts them into a predetermined length with a mold, and then allows them to fall freely onto the guide pins 4 to stack a predetermined number of fins 5.

After stacking a predetermined number of fins, rotate the index table 6 to take out the appropriate fins and assemble the pipe and fins.

This conventional method of assembling pipes and fins has the following drawbacks.

5(l) Since the fins, which have a small weight, are piled up by falling freely onto the guide pins, there are many stacking errors and it is not possible to improve the press operation rate.

In particular, if the guide pin is too long, it becomes difficult to align the tips of the pins, increasing stacking errors. (2) Since the fin stacking method uses free fall, it is necessary to use a guide pin with a diameter considerably smaller than the pipe insertion hole of the fin.

For this reason, the fins are piled up with this guide pin as a reference, and it becomes difficult to insert a pipe that is thicker than the guide pin when the fins are stacked in this manner. [Purpose of the invention]
The present invention improves the above-mentioned drawbacks and provides a pipe and fin assembly device that can improve device reliability and press operation rate.

[Summary of the invention]

A device that continuously produces ribbon-like fins in multiple rows, a feed mechanism that is independent of the device, and a cutting device that increases the distance between the ribbons by twisting and slackening the ribbon that is pulled out of the device. A mechanism, a guide plate that supports the fin on the long side of the fin, a push-down block that pushes down the fin with almost the entire surface of the fin after cutting, and a mechanism that releases the guide plate when the push-down block descends, are installed on the trolley. It is equipped with a pipe and fin assembly device that includes a device that pushes the fins one by one into the guide pin, and a device that inserts the pipe into the hole in the fin on the cart where the guide pin is not inserted at the next station. It is something.

[Embodiments of the invention]

The details of the present invention will be explained below with reference to an embodiment shown in FIGS. 2, 3, 4, and 5. In FIGS. The ribbon is formed into ribbon-like fins and taken out of the press, and the ribbon is given twist and deflection to appropriately widen the distance between the ribbons without plastically deforming the fins, and then fed to the feed mechanism 12 independent of the press. do.

The amount of deflection of the fins between the press 2 and the feed mechanism 12 is controlled by detectors Ila and Ilb to start and stop the press.

The fin fed by the feed mechanism 12 passes between the guide plate 18, which supports the fin on the long side of the fin in FIG. At the same time as positioning, the upper blade and lower blade 14b incorporated in the push-down block 14a cut the fins.

At the same time as the fins are cut, the guide plate 18 escapes due to the lowering of the push-down proc 14a, and the push-down proc 14a presses down almost the entire surface of the fin.
4a to forcibly push the fin into the guide pin 4.

When the push-down block 14a rises immediately after the fin is pushed in, the guide plate returns to its original position by the spring 19 and the next fin is advanced. In this way, a predetermined number of fins are stacked and stacked.

The outer diameter of the guide pin is preferably greater than or equal to the diameter of the pipe into which it is inserted.
For example, for a pipe with an outer diameter of 9.5 mm, the outer diameter is 9.6 mm.
The diameter of the front and rear pins is large, which makes pipe insertion easy and reliable. In order to increase the height of the fins, it is necessary to lengthen the four guide pins, and if the pins are only mounted on the cart, the pin tip position will be out of alignment with the fin insertion position, and will hit the pins when the push-down block is lowered.

In order to ensure that the tip of the pin is approximately aligned with the fin insertion position, it is recommended to hold the middle part of the pin with the pin support/holding plate 16, stack the fins appropriately, and then lower the pin support plate. .

At the next station, the U-shaped pipe 2 is transferred from the pipe magazine 17 to the multiple rows of fins loaded on the trolley 15 as shown in FIG.
0 and insert the pipe into the hole in the fin where the guide pin is not inserted.

〔Effect of the invention〕

As described above, the pipe and fin assembling apparatus of the present invention enables highly reliable automation, reduces man-hours, and improves equipment operating rate.

[Brief explanation of the drawing]

Fig. 1 is a diagram illustrating a conventional fin and pipe assembly device, Fig. 2 is a plan view illustrating the fin and pipe assembly device of the present invention, Fig. 3 is a side view of Fig. 2, and Fig. 4 3 is a view from arrow A in FIG. 3, and FIG. 5 is an explanatory diagram of inserting a pipe into the fin of the present invention. 1...Aluminum plate, 2...Press, 3
... Vacuum device, 4 ... Guide pin, 5 ... Fin, 6 ... Index table, 10 ... Ribbon-shaped fin ,1
1...Detector, 12...Feed mechanism, 13...Pilot pin, 14a...
・Push down block, 14b...Lower blade, 15...
・Dolly, 16...Pin support plate, 17...
・Pipe magazine, 18. ．． ．． ...Guide plate, 19.
...Spring, 20...U-shaped pipe.

Claims (1)

[Claims] 1. A device that continuously produces ribbon-shaped fins in multiple rows; a feed mechanism that is independent of the device after the ribbons are drawn out of the device, and the ribbons are twisted and slackened to widen the distance between the ribbons; A mechanism that includes a cutting mechanism, a guide plate that supports the fin on the long side of the fin, a push-down block that pushes down the fin with almost the entire surface of the fin after cutting, and a guide plate when the push-down block lowers the trolley. A device for assembling pipes and fins, which is equipped with a device for pushing fins one by one into guide pins provided at the station, and a device for inserting the pipes into holes in the fins on the cart in which no guide pins are inserted at the next station.