JPH0661324U - Tube expansion device - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention requires no complicated oil temperature management or preheating process instantly even when used in a work place such as a cold region where the temperature changes drastically. It is intended to provide a pipe expanding device which is capable of accurately performing a desired pipe expanding work and which has extremely excellent workability and which has extremely high production efficiency. [Structure] A plurality of mandrels for pipe expansion are inserted and inserted into a plurality of pipes to be expanded so as to be press-fitted, and flare processing is performed on an opening of the pipe expanded through the reciprocating motion bodies. A plurality of flare punches are provided, and a flare punch plate reciprocating along the reciprocating direction of the reciprocating body, and a reciprocating means for reciprocating the flare punch plate and the reciprocating body. In the tube expanding device, the reciprocating means includes a rail provided on the body of the tube expanding device, a rotating body having a meshing portion capable of meshing with the rail, and an electric motor for rotating the rotating body. In addition, each of the reciprocating body and the flare punch plate reciprocates independently along the rail body.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe expanding device, and more particularly to a pipe expanding device for expanding pipes by press-fitting a pipe expanding mandrel into a plurality of pipes penetrated by a heat exchanger.

[0002]

[Prior art]

 Conventionally, as a pipe expanding device of this type, as shown in FIGS. 2 and 3, for example, it is reciprocally movable via cylinders 4 and 4 and has a substantially rectangular shape with a through hole 5b in the center. On the lower surface portion 5a of the returning actuating body 5, there is provided a mandrel engaging body 5c into which a plurality of pipe expanding mandrels 6 each having an engaging head 6a are inserted, and the mandrel engaging body 5c and the reciprocating actuating body. A pressing attachment 5d for pressing the locking head 6a of the pipe expanding mandrel 6 at the time of pipe expansion is detachably inserted between the pipe 5 and the pipe 5, and the protruding length of the pipe 10 at the time of pipe expansion is provided below. The reciprocating body includes a stripper plate 8 having a stripper 8a to be determined, and a flare plate 7 having a plurality of flare punches 7a for performing flare processing which is secondary and tertiary expansion at the opening of the expanded pipe 10. There is a device that can be reciprocated in conjunction with 5, Moreover, it is appropriately used.

That is, in the tube expanding device having the above-described structure, a plurality of tubes 10 to be expanded, which have lower ends 10a formed in a substantially U shape on a plurality of heat dissipating fins 9 are formed below the stripper plate 8 in the same direction. A heat exchanger 12 formed so as to have desired end plates 11a and 11b is mounted on both ends of a radiation fin 9 through which the pipe 10 is inserted through a receiver 13. In addition, by lowering the reciprocating body 5 through the cylinders 4 and 4, as shown in FIG. 4, the pipe expanding mandrel 6 is press-fitted into the pipe 10 to expand the pipe 10. The end plates 11a and 11b, the plurality of heat radiation fins 9 and the pipe 10 are integrally fixed to each other, and the flare punch 7a is press-fitted into the opening of the pipe 10 after the pipe expansion. The flare processing 10b can be performed.

[0004]

[Problems to be solved by the device]

 However, the conventional tube expanding device has the following problems.

That is, the driving means for reciprocatingly moving the reciprocating body and the like provided in the above-described conventional tube expanding device requires a very strong pressing force during tube expansion.

[0006] Therefore, normally, as a driving means such as a reciprocating body used in the pipe expanding device, a hydraulic cylinder driven by hydraulic pressure sent via a hydraulic pump, a hydraulic motor, or the like is used. When using a pipe expanding device equipped with a hydraulic cylinder, it is necessary to raise the oil used to a certain temperature in order for the hydraulic cylinder etc. to perform smooth and accurate operation. There is a nature.

[0007] Therefore, since preheating means such as a heat wire heater is required to raise the oil temperature to a desired value, an oil exchange due to an inferior deterioration of the oil due to an indirect increase in equipment cost and frequent oil temperature changes. However, there was a very difficult problem that the running cost of the oil and the oil cost was soaring.

Further, in the above-described conventional pipe expanding device, the flare plate including the flare punch for performing the flare process is configured to reciprocate in association with the reciprocating motion of the reciprocating body. Also requires a strong pressing force, which has been a factor in directly increasing the manufacturing cost.

Therefore, the present invention solves all of the above problems, and even when used in a work place such as a cold region where the temperature changes drastically, complicated oil temperature management, preheating process, etc. It is possible to perform the desired pipe expanding work instantaneously and accurately without any work of the above, and at the same time, to provide an extremely excellent pipe expanding device that can reduce indirect equipment costs and direct manufacturing costs. The challenge is to provide.

[0010]

[Means for Solving the Problems]

 That is, according to the present invention, a plurality of mandrels for expanding a pipe are inserted and inserted into a plurality of pipes to be expanded so as to be press-fitted, and a flare is formed in the opening of the pipe expanded through the reciprocating body. A flare punch plate having a plurality of flare punches for performing machining and reciprocating along the reciprocating direction of the reciprocating body, and a reciprocating motion for reciprocating the flare punch plate and the reciprocating body. In a pipe expanding apparatus including a means, the reciprocating means rotates a rotating body having a rail body provided in the main body of the pipe expanding apparatus, a rotating body having a meshing portion capable of meshing with the rail body, and the rotating body. Each of the reciprocating body and the flare punch plate reciprocates independently along the rail body.

Further, an electric motor for rotating the rotating body to separately reciprocate the reciprocating body and the flare punch plate is provided at each of the reciprocating body and the flare punch plate.

[0012]

[Action]

 In the tube expanding device having the above structure, the reciprocating body and the flare punch plate are each provided with an electric motor, and the reciprocating body and the flare punch plate are provided in the tube expanding device body through the electric motor. Since the motors can be individually moved back and forth along the rails, it is possible not only to make the electric motor inexpensive and small, but also to use it in a work place such as a cold region where the temperature changes drastically. However, no complicated oil temperature management or preheating process is required at all, and the pipe expanding device can be operated instantaneously and accurately to perform the desired pipe expanding work.

[0013]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

Regarding the configuration of the tube expanding device according to the embodiment of the present invention, the description of the parts overlapping with the tube expanding device of the conventional example will be omitted below.

In FIG. 1, reference numeral 1 denotes a main body of the tube expanding device, which is composed of columns 1b standing on a base (not shown).

Reference numeral 2 denotes a reciprocating body 5 provided in the main body 1 of the tube expanding device, and the reciprocating body 5 is provided along a pair of guide posts 1a vertically provided on the base (not shown). An electric motor is shown as a driving force for reciprocating.

Reference numeral 3 denotes a rack (rail body) provided along the pillar 1b.

The electric motor 2 and the rack 3 have a shaft extending from a rotational force transmitting means such as a chain 2a for transmitting the rotational force of the electric motor 2 and a reduction gear (not shown) provided at a predetermined position. The reciprocating means is constituted by meshing a pinion 3a (rotating body), which is axially attached to the portion and has a predetermined number of tooth portions (meshing portions), with the rack 3.

Reference numeral 5f denotes a reciprocating body guide, which is provided with guide rollers 5g rotatably attached to guide rails 1c formed on the pillar 1b, and is provided on both sides of the reciprocating body 5. It will be pasted.

Reference numeral 7 denotes a flare punch plate which reciprocates along the reciprocating direction of the reciprocating body 5, which has an electric motor 2 as a driving force similarly to the reciprocating body 5 and is provided along the column 1b. The pair of guide posts 1a are reciprocally provided similarly to the reciprocating body 5 by engaging a pinion 3a (rotating body) with the rack 3 (rail body).

Reference numeral 7b denotes a flare punch plate guide guide, which is provided with a guide roller 7c rotatably attached to a guide rail 1c engraved on the support column 1b. It is affixed to both sides.

The tube expanding device according to the present embodiment has the above-described configuration. A case will be described below in which a desired tube expanding is performed using the device described below.

First, as shown in FIGS. 1 and 3, the electric motor 2 provided in each of the reciprocating body 5 and the flare punch plate 7 is driven, and its rotational force is transmitted to a rotational force transmitting means such as a chain 2a. And, by transmitting to the pinion 3a (rotating body) via a reduction gear (not shown) provided at a predetermined position, the pinion 3a (rotating body) meshing with the rack 3 is moved along the rack 3. It will rotate.

Therefore, when the pinion 3a (rotating body) rotates along the rack 3, the reciprocating body 5 having the pinion 3a (rotating body) and the flare punch plate 7 also descend at the same time. As shown in Fig. 4, the mandrel 6 for expanding the pipe is press-fitted into the plurality of pipes 10 constituting the heat exchanger 12 positioned and set downward, so that the desired expanding work can be performed. The desired flare processing 10 b can be applied to the 10 openings.

In the above-mentioned embodiment, an electric motor is used as a driving means for reciprocating the reciprocating body and the flare punch plate separately. It may be an induction machine, a synchronous machine, or various kinds of control electric motors, and the specific mechanism, shape, quantity, etc. of the electric motors are not limited by any means, and are not necessarily integrated with the reciprocating body and flare punch plate. Needless to say, the electric motor may be separately provided from the reciprocating body and the flare punch plate and fixed to a predetermined position of the tube expanding device main body.

Further, in the above-described embodiment, each of the reciprocating body and the flare punch plate, each having a driving electric motor, has a rotational force transmitting means such as a chain for transmitting the rotational force of the electric motor and a predetermined force transmitting means. A pinion (rotating body) having a predetermined number of teeth (meshing parts) that should rotate through a speed reducer (not shown) provided at a location, and the teeth of the pinion can mesh with each other, and a tube expanding device It is configured to reciprocate separately by the rack (rail body) provided on the column of the column, but it is not always necessary to have a rotational force transmitting means such as a chain and a speed reducer provided at a predetermined position. Further, the concrete shape of the rack (rail body) may be a pin rack, a compound rack, a mangle rack, etc., and it is not necessary that the rack (rail body) is provided on the column of the tube expanding device body. Ku The pinion (rotating body) that meshes with the rack (rail body) may be a pin gear, a worm gear, or the like. The point is that the rail body provided in the expansion device main body and the rail body A reciprocating means is composed of a rotating body having a meshable portion and an electric motor for rotating the rotating body, and the reciprocating body and the flare punch plate reciprocate independently along the rail body. The specific mechanism, shape, quantity, etc. of each part are not limited as long as they are configured.

Further, the pipe expanding device in one embodiment of the present invention is a vertical pipe expanding device which is erected on a base. The point is that the rail body provided in the main body of the pipe expanding device and the rail body. If a reciprocating means is composed of a rotating body having a meshing portion capable of meshing with each other, and an electric motor for rotating the rotating body, each of the reciprocating body and the flare punch plate is substantially the same as the ground, floor, etc. It goes without saying that it may be a so-called horizontal tube expanding device that moves in parallel.

Further, in the above embodiment, the stripper plate is provided so as to interlock with at least one of the reciprocating body and the flare punch plate, but the stripper plate has a separate reciprocating means. The stripper plate reciprocating means may be provided so as to be able to reciprocate separately from the reciprocating body and the flare punch plate via a stripper plate, or may be provided with a dedicated electric motor or cylinder for reciprocating the stripper plate. The specific mechanism, shape, quantity, mounting location, etc. are not limited.

Further, in the above-described embodiment, the reciprocating body and the flare punch plate that reciprocate independently are configured to reciprocate along a common rail body, but the rail bodies provided separately Alternatively, the reciprocating body and the flare punch plate may reciprocate separately, the rail body does not have to be common, and the rail body may be integrally formed by a plurality of connecting bodies.

Therefore, the specific configurations of the reciprocating means in the present invention, such as the number, shape, and attachment points, can be arbitrarily modified within the scope intended by the present invention.

[0031]

[Effect of device]

 As described above, according to the present invention, a reciprocating body having a plurality of mandrels for pipe expansion inserted therein so as to be press-fitted into a plurality of pipes to be expanded, and the pipe expanded through the reciprocating body. The opening includes a plurality of flare punches for performing flare processing, and a flare punch plate that reciprocates along the reciprocating direction of the reciprocating actuator, and a reciprocating motion of the flare punch plate and the reciprocating actuator. In a tube expanding device provided with reciprocating means, the reciprocating means is provided with a rail body in the body of the tube expanding device, a rotating body having a meshing portion capable of meshing with the rail body, and the rotating body. In addition, since the reciprocating body and the flare punch plate each independently reciprocate along the rail body, the reciprocating body and the flare punch plate can be reciprocated independently of each other. A place like are also instantly without completely necessary work such as also complicated the oil temperature control and preheating process, and accurately it is possible to perform the desired pipe expansion work.

Therefore, unlike the prior art, since no preheating means such as a hot wire heater for raising the oil temperature to a desired value before pipe expansion is completely unnecessary, it is accompanied by an indirect increase in equipment cost and frequent oil temperature changes. It is possible to completely eliminate the complexity of oil exchange due to the deterioration of oil and the oil cost.

Further, the pipe expanding apparatus according to the present invention is capable of separately performing the pipe expanding process and the flare process, which are conventionally performed by a pair of large cylinders, respectively, so that the reciprocating body for the pipe expanding and the flare process can be performed. Since each flare punch plate has an electric motor for driving in order to reciprocate separately along the rail body, it is possible to use a cheap and small electric motor. Therefore, the direct manufacturing cost can be reduced.

Further, the tube expanding device in the present invention directly transmits the rotational force from the electric motor to the reciprocating mechanism without using the rod rod expanding / contracting mechanism provided in the hydraulic cylinder or the like as in the prior art, and Since the reciprocating body and the flare punch plate are reciprocated via the moving means, the overall height of the pipe expanding device can be set to be extremely low, and the carrying in and installation in the building can be performed very easily. It also has a special effect of being able to do it.

[Brief description of drawings]

FIG. 1 is a perspective view showing a tube expanding device according to an embodiment of the present invention.

FIG. 2 is a front view showing a conventional tube expanding device.

FIG. 3 is an enlarged cross-sectional view showing a state around a mandrel before pipe expansion.

FIG. 4 is an enlarged cross-sectional view showing a state near the mandrel after pipe expansion. 1 ... Tube expanding device main body 2 ... Electric motor 3 ... Rack (rail body) 3a ... Pinion (rotating body) 5 ... Reciprocating body 6 ... Tube expanding mandrel 7 ... Flare punch plate 7a ... Flare punch 8 ... Stripper plate 8a ... Stripper

Claims (4)

[Scope of utility model registration request] 1. A reciprocating body (5) in which a plurality of pipe expanding mandrels (6) are inserted and inserted into a plurality of pipes (10) to be expanded, and the pipe (10) expanded through the reciprocating body (5). Multiple flare punches 7a to flare the opening 10b
And a flare punch plate 7 reciprocating along the reciprocating direction of the reciprocating body 5, and a reciprocating means for reciprocating the flare punch plate 7 and the reciprocating body 5. In the pipe expanding device, a rail body provided with the reciprocating means in the pipe expanding device body 1, a rotating body having a meshing portion capable of meshing with the rail body, and an electric motor 2 for rotating the rotating body. In addition, the reciprocating body 5 and the flare punch plate 7 are configured to reciprocate independently along the rail body, respectively. 2. The reciprocating body 5 and the flare punch plate 7 are each provided with an electric motor 2 for individually reciprocating the reciprocating body 5 and the flare punch plate 7 by rotating the rotating body. The tube expanding device according to claim 1, wherein 3. The pipe expanding device according to claim 1, wherein the rail body is a rack 3 provided on a column 1b of the pipe expanding device main body 1. 4. The rotating body having the engaging portion is a pinion 3a.
The tube expanding device according to any one of claims 1 to 3.