JPH0141409B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a pitch correction device for heat exchanger fins that processes fins that have been previously processed to a pitch coarser than the pitch of the final product into a final product with a desired pitch. It is related to.

[Conventional technology and its problems]

Conventional fin forming methods can be roughly divided into two types: (1) rotary type using a rotating blade and (2) press type using vertical movement of the blade. (2) Rotary type is more efficient and causes less damage to the teeth. However, due to the constraints on the engagement of the rotating blades, the height of the fins is high, making it difficult to mold items with dense pitches.

Heat exchangers generally use high fin height and densely spaced fins to increase heat transfer efficiency.(2) Press type, which is adopted to meet this requirement, allows the fins to be pitched at the desired fin height. Although it is possible to form dense fins, unfortunately it is inefficient, and forming complex-shaped fins easily damages the teeth, requiring frequent polishing and replacement of the teeth, which takes a lot of effort to maintain accuracy. There is a drawback that it requires Also, even with this press method, it is difficult to mold objects with dense pitches, such as those with louvers.

[Means for solving problems]

In view of the above, the present invention provides a pitch correction device for shaping fins that have been previously processed into a shape with a relatively coarse pitch into fins with a desired dense pitch using an efficient forming method such as a rotary method. To describe the features with reference to the embodiment drawings, the guide groove 1 has an adjustable groove width.
A pair of inlet and outlet gears at each end of the
BB' and AA' are arranged, and the feed gear BB' and the discharge gear AA' are provided so that the number of feeding threads of both fins is the same, and the distance between the axes of one set of gears can be adjusted. In addition, the above feed gear
The point is that BB' and discharge gear AA' are provided so that they can be rotated by increments independently.

[Effect]

According to the pitch correction device of the present invention, the feeding gear
The pitch of the fins can be adjusted between BB' and discharge gear AA' by inching between the two gears. Since both gears have the same number of fin threads, by driving both gears, the fins with the pitch adjusted between the two gears are discharged from the device, and the pitch is corrected. Therefore, according to the present apparatus, it is possible to efficiently and easily process and form fins with dense pitches and complex shapes, and it is also possible to greatly reduce the maintenance effort.

〔Example〕

The structure and operation of the fin pitch correcting device of the present invention will be explained in more detail below with reference to the drawings. The drawing is an explanatory view showing one embodiment of the fin pitch correction device of the present invention.

1 is a guide groove whose width is adjustable, and the width is adjusted according to the height of the fin to be straightened, and a set of discharge gears AA' is placed at the left end of the guide groove, and a set of discharge gears AA' is placed at the right end of the guide groove. Required gears BB′ are provided respectively.

The above discharge gear AA′ and feed gear
BB' is driven by the main drive shaft 2, and is connected to a pair of worms 3, 3' mounted on the shaft 2 in opposite directions, worm wheels 4, 4' and sprockets 5, 5' that mesh with the worm wheels 4, 4', respectively. The fins F are disposed to be discharged from the guide groove 1 and fed into the guide groove 1 by rotating in mesh with each other through a transmission device of interlocking belt chains 6 and 6'. The above-mentioned discharge gear AA' and feed gear BB' can also be adjusted by adjusting a transmission device consisting of sprockets 5, 5' and belt chains 6, 6' or other transmission devices added thereto. The number of fins to be fed is the same, so that the number of fins F that is always fed and the number of fins that are discharged are the same,
Therefore, the number of fins F between the discharge gear AA' and the feed gear BB' is always constant. Both feeding gears are provided so that they can be replaced with feeding gears of appropriate size and shape depending on the size and shape of the fin to be straightened. Also, the above discharge gear
AA' and feed gear BB' are each set with a large distance between the shafts of each set of gears, and are attached to each shaft with nuts 7, each having the same pitch and screws in opposite directions.
7' and 8, 8' are engaged with screws 9, 9' and 10, 10' of the same pitch and in opposite directions as the nuts fixed to the common manual rotation shafts a and b,
It is provided so that it can be freely adjusted by rotating the manual rotation shafts a and b in forward and reverse directions. In addition, the above-mentioned discharge gear AA′ and feed gear
By attaching BB' to the shaft via a clutch (a one-way clutch may also be used), it can be easily fixed and released from the shaft. It is provided so that it can be rotated by increments independently by handles 11, 11'.

Next, the operation of the fin straightening device of the present invention having the structure described above will be explained.

First, adjust the width of the guide groove 1 to match the height of the fin to be straightened, and then adjust the width of the ejection gear.
After adjusting the distance between the axes of AA' and feeding gear BB' by rotating the manual rotation axes a and b in the forward and reverse directions, the fins (primary Processed product) F is the feeding gear
Rotate BB' with the handle 11' (at this time, the discharge gear AA' remains stopped) and feed it into the guide groove 1, so that the shape of the fins F in the guide groove is formed into the shape of dense fins with the desired pitch. Continue sending until the Next, after confirming that the fins F in the guide groove 1 are formed at the desired pitch, the ejection gear
AA' and the feed gear BB' are simultaneously rotated by the main drive shaft 2 to perform normal pitch correction operation of the apparatus of the present invention, that is, the feed gear BB' is used to correct the rough pitch of the primary processed product. The fins F are fed into the guide groove 1, and the completed fins having the desired pitch and whose pitch has been corrected are continuously discharged by the discharge gear AA'. In addition, if any abnormality is found in the pitch during inspection during the above continuous operation, or if the pitch is actively changed, stop operation immediately, and if the pitch is large, replace the feed gear.
Adjust the pitch to the desired pitch by rotating only BB' with the handle 11', or by stopping the discharge gear AA' and rotating the feed gear BB', and if the pitch is small. On the other hand, rotate only the discharge gear AA' with the handle 11, or
Or stop the feed gear BB′ and stop the discharge gear
Turn AA′ into a rotating state, coarsen the pitch, adjust to the desired pitch, and return to normal continuous operation.

〔Effect of the invention〕

As described above, the fin pitch correcting device of the present invention can efficiently and easily process fins with dense pitches and complex shapes using a rotary molding method. Alternatively, the pitches can be roughly formed using a press and then formed into dense fins using the pitch correction device of the present invention. Moreover, it completely achieves the originally stated objective of significantly reducing the maintenance effort.

[Brief explanation of drawings]

The drawing is an explanatory side view showing one embodiment of the pitch correction device for heat exchanger fins of the present invention. Explanation of the symbols in the drawings below: AA′: Discharge gear, BB′: Feed gear,
a, b: Discharge and inlet gears (AA' and
Manual rotating shaft for adjusting the distance between the shafts of BB'), F: Fin, 1: Guide groove, 2: Main drive shaft, 3, 3': Worm, 4, 4': Worm wheel, 5, 5':
Sprocket, 6, 6': Belt chain, 7,
7', 8, 8': Natsu, 9, 9', 10, 10':
Screws, 11, 11': Handle.

Claims (1)

[Claims] 1. A pair of feed gears and a pair of discharge gears are provided at each end of a guide groove whose groove width is adjustable, and the feed gear and discharge gear are provided so that the number of feed threads of both fins is the same. Pitch correction of a fin for a heat exchanger, characterized in that the distance between the shafts of both sets of gears can be adjusted, and the feed gear and the discharge gear are provided so as to be able to rotate independently. Device.