JP4609750B2 - Standard stand for tube expansion equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is to manufacture a heat exchanger by integrating a plurality of radiating fins and a plurality of tubes inserted through the radiating fins through press-fitting into a tube of a tube expansion mandrel that expands the tube. It is related with the reference stand for tube expansion apparatuses used for the tube expansion apparatus which can do.
[0002]
[Prior art]
Conventionally, as a tube expansion device having this kind of tube expansion device reference table , for example, there is one disclosed in Japanese Utility Model Publication No. 1-263050.
[0003]
As shown in FIG. 4, the tube expanding apparatus described in the above publication has a pair of support columns 19 a standing on a base 19 with a predetermined interval, and the upper ends of the support columns 19 a are interposed via beam members 20. The apparatus main body 14a is formed by being connected.
[0004]
The expansion plate mandrel 5 is press-fitted into the apparatus main body 14a from the tube port of the tube 16 of the heat exchanger 15 set on the base 19, and the tube 16 and the end plate 15a and the plurality of radiation fins 15b are respectively inserted. The reciprocating body 7 having the tube-expanding mandrel 5 is inserted through a guide bar (guide post) 21 erected against the column 19a and through two cylinders 6. It can be moved up and down (reciprocating freely).
[0005]
The reciprocating body 7 has a pinion gear 12 that meshes with a rack body 11 that is mounted in a straight line so as to measure the descending dimension of the reciprocating body 7 that moves to the heat exchanger 15 side. An encoder 13 that counts twelve rotation angles is provided.
[0006]
Further, the reciprocating body 7 has a stripper 9a for setting the protruding length of the tube 16 protruding from the end plate 15a by abutting against the end plate 15a of the heat exchanger 15 and pushing down the end plate 15a. A stripper plate 9 is suspended.
[0007]
The stripper plate 9 is provided with a limit switch 10 for detecting the start of lowering of the stripper plate 9 which is lowered so as to move together with the reciprocating body 7 toward the heat exchanger 15 side.
[0008]
Further, on both sides of the stripper plate 9, when the encoder 13 measures the descending dimension of the reciprocating body 7 using the detection signal of the limit switch 10 as a start signal, and reaches the preset descending dimension, the stripper plate An integral balance cylinder 8 is provided which operates to stop the lowering of 9.
[0009]
Therefore, in the tube expansion device 14 having the above-described configuration, when the measurement position measured through the encoder 13 using the detection signal of the limit switch 10 as a start signal reaches a preset value, the balance cylinder 8 is By operating and stopping the descent of the stripper plate 9, the projecting length of the tube 16 projecting from the end plate 15 a of the heat exchanger 15 at the time of tube expansion can be appropriately set to a predetermined dimension.
[0010]
However, since the tube expansion device having the above-described configuration requires various devices such as the limit switch 10, the rack body 11, and the encoder 13 using the pinion gear 12 meshing with the rack body 11 to be individually attached to the apparatus. Cost will soar.
[0011]
Therefore, in order to prevent the manufacturing cost from rising as described above, a tube expansion device having the structure shown in FIG. 3 has been developed and is now on the market in place of the tube expansion device.
[0012]
Such a pipe expansion device uses a cylinder 4 having a pulse encoder 18 and has a structure in which a reference base 1 for stopping the descent of the stripper plate 9 is attached to a telescopic rod 4a of the cylinder 4 via a fixing member 1a such as a male screw. It will be.
[0013]
Therefore, according to the tube expanding device having the latter configuration, the step of operating the balance cylinder 8 by measuring the actual descending dimension of the descending reciprocating body 7 as in the tube expanding device having the former configuration. Without requiring it, the protruding length of the telescopic rod 4 a can be easily set in advance via the pulse encoder 18.
[0014]
Therefore, the manufacturing cost can be reduced by reducing the number of various equipment such as the limit switch 10, the rack body 11, and the encoder 13 having the pinion gear 12 meshing with the rack body 11.
[0015]
[Problems to be solved by the invention]
However, the tube expansion device having the above configuration has the following problems.
[0016]
In other words, the stripper plate 9 stops at a predetermined position only through a pair of cylinders that support both ends of the stripper plate 9 in both the former and latter configurations.
[0017]
Therefore, when expanding the heat exchanger 15 having a long overall length, the extension length of the expansion rod of the cylinder for stopping the stripper plate 9 at a predetermined position is naturally limited. When expanding the tube, it must be replaced with a cylinder having a telescopic rod having an applicable effective stroke, and the replacement work for that purpose is complicated, and a cylinder adapted to the full length of the heat exchanger 15 is prepared. There was also a problem in terms of cost.
[0018]
That is, the present invention adapts to the total length of the heat exchanger 15 without preparing or replacing a cylinder that adapts to the total length of the heat exchanger 15 even when the total length of the heat exchanger 15 that performs tube expansion is different. Thus, a reference table for a tube expansion device that can stop the stripper plate 9 at a predetermined position is provided.
[0019]
[Means for Solving the Problems]
The present invention is capable of reciprocating along the longitudinal direction of a support column (19a) provided on a base (19) of a pipe expansion device (14), and is also a heat exchanger (15) set on the base (19). The stripper plate (9) for setting the projecting length of the tube (16) projecting from the end plate (15a) by pushing down the end plate (15a ) is used in the tube expansion device (14) to stop the stripper plate (9) at a predetermined position. Oite the reference table for expanding apparatus (1), on one side of the reference table for the enlarged tube device (1) is the reference platform for expanding apparatus (1) to reciprocate freely along the longitudinal direction of the struts (19a) A slide holding portion (1a) for holding is provided, and a female screw portion (1b) for rotatably inserting and inserting the male screw portion (2a) of the rod-like male screw (2 ) is provided on the other side. It is in the established point.
[0020]
Therefore, even when the total length of the heat exchanger (15) for expanding the pipes is different, the total length of the heat exchanger (15) is not required to prepare or replace a cylinder adapted to the total length of the heat exchanger (15). There is an advantage that the reference base (1) can be moved in a wide range by the rotation of the rod-shaped male screw (2).
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a tube expansion device having a tube expansion reference table according to the present invention will be described with reference to the drawings. However, with respect to the configuration of the tube expansion device, description of portions overlapping with the conventional tube expansion device will be omitted below.
[0022]
In Figure 1, 1 indicates a reference table for tube expanding device, on one side of such a pipe expanding device for a reference table 1 is slidably LM guides 3 mounted on each of the struts 19a provided on the base 19 A female holding screw is provided in which a slide holding portion 1a that is externally fitted is provided, and a rod-shaped male screw (guide rod) 2 that is erected on the base 19 in a state parallel to the support column 19a is rotatably inserted into the other side. Part 1b is provided.
[0023]
A motor 17 having a pulse encoder 17a is housed in a side end 23 of the base 19, and a rotating rod 22a rotated by a belt body 22 rotating via the motor 17 is stored in the base 19. A gear 22b attached to the base 19 is provided, and the gear 22b is engaged with a gear 2c fixed to the lower end of the rod-shaped male screw 2 erected on the base 19.
[0024]
Since the tube expansion device provided with the tube expansion device reference table in the present embodiment has the above-described configuration, the tube expansion device reference table 1 is adapted to correspond to the entire length of the heat exchanger (not shown) for tube expansion. 17, it can be stopped at any position through rotation of the pulse encoder 17a and the rod-shaped male screw 2.
[0025]
Therefore, even if the tube expansion device reference table 1 momentarily receives the weight of the stripper plate 9 during tube expansion, the tube expansion device reference table 1 is slidably provided on the column 19a. There is an advantage that the bending of the screw 2 can be reduced, and therefore it is possible to prevent not only the screw thread of the rod-shaped male screw 2 but also the screwed portion with the female screw portion 1b of the reference base 1 for the tube expansion device. .
[0026]
Furthermore, in the above embodiment, the tube expansion device reference table 1 is provided with the female screw portion 1b into which the rod-shaped male screw 2 parallel to the support column 19a is rotatably inserted, so that heat exchange for expanding the tube is performed. Even if the total length of the heat exchanger 15 is different, it is not necessary to prepare or replace a cylinder adapted to the full length of the heat exchanger 15, and to adapt the full length of the heat exchanger 15, the reference table 1 for the tube expansion device 1 is There is an advantage that it can be moved in a wide range by the rotation of the screw 2.
[0027]
Further, as shown in FIG. 2, one portion (the other end portion) of the reference base 1 is connected to a guide bar (a guide post of a reciprocating member) 21 provided in parallel with the support column 19a via a guide hole 1c. It may be provided movably.
[0028]
Thus, by expanding apparatus for the reference platform 1 via both the guide holes 1c and the slide holding portion 1a is provided movable in both posts 19a and the guide bar 21, for example expanding apparatus for the reference platform 1 stripper plate Even when the weight of 9 is instantaneously received, the rod-shaped male screw is more securely prevented from bending, and the threaded portion of the rod-shaped male screw 2 and the threaded portion with the female screw portion 1b of the tube expansion device reference base 1 are used. There is an advantage that it is possible to prevent the breakage.
[0029]
Furthermore, in the said embodiment, although the one side of the reference | standard stand 1 for tube expansion apparatuses is externally fitted slidably by the LM guide 3 attached to each of the support | pillar 19a provided in the base 19, the point is a reference | standard Needless to say, the base 1 is not limited to the LM guide as long as the base 1 is slidably provided on the support column 19a.
[0030]
In the above embodiment, the tube expansion device is a so-called vertical tube expansion device, but may be a horizontal tube expansion device. In short, the stripper plate 9 provided in the tube expansion device should be stopped at a predetermined position. Any tube expansion device may be used as long as the tube expansion device reference table 1 abutting against the stripper plate 9 is reciprocally movable along the support column 19a.
[0031]
【The invention's effect】
As described above, the present invention is capable of reciprocating along the longitudinal direction of the support provided on the base of the pipe expansion device, and further pressing down the end plate of the heat exchanger set on the base. Oite a stripper plate for setting the projection length of the tube projecting from the end plate to the pipe expanding device for a reference table used in the expanding apparatus so as to stop at a predetermined position on one side of the reference table for the enlarged tube apparatus, for tube expander A slide holding portion is provided for holding the reference table in a reciprocating manner along the longitudinal direction of the support column , and a female screw for rotatably inserting and inserting the male screw portion of the rod-like male screw on the other side. Therefore, even if the total length of the heat exchanger that performs tube expansion is different, there is no need to prepare or replace a cylinder that adapts to the total length of the heat exchanger in the tube expansion device. Adapted to full length Leading to an effect that a wide range by moving (lifting) is allowed to be able to provide a reference platform for expanding apparatus which is versatile and reference platform for expanding apparatus by rotation of the rod-shaped male screw Te.
[Brief description of the drawings]
1A and 1B show a tube expansion device according to the present invention, in which FIG. 1A is a partially omitted perspective view near a reference base, and FIG.
FIG. 2 is a partially omitted perspective view in the vicinity of a reference base of the tube expansion device according to the present invention.
FIG. 3 is a partially enlarged cross-sectional view of a conventional tube expansion device.
FIG. 4 is a front view of a conventional pipe expansion device.
1 ... Reference stand for tube expansion device 2 ... Rod-shaped male screw (guide rod)
9 ... stripper base 9a ... stripper 14 ... tube expansion device 15 ... heat exchanger 16 ... tube 17 ... fin

Claims (1)

An end plate of a heat exchanger (15) set on the base (19) and reciprocating along the longitudinal direction of a column (19a) provided on the base (19) of the pipe expansion device (14). The tube expansion device reference used in the tube expansion device (14) to stop the stripper plate (9) which sets the protruding length of the tube (16) protruding from the end plate (15a) by pushing down (15a) at a predetermined position. Oite the platform (1), on one side of the reference table for the enlarged tube device (1) is the reference platform for expanding apparatus (1) a strut for holding reciprocatingly along the longitudinal direction of (19a) A slide holding portion (1a) is provided, and a female screw portion (1b) for rotatably inserting the male screw portion (2a) of the rod-shaped male screw (2 ) is provided on the other side. Reference stand for tube expansion device

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