JPS628905Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an apparatus for swaging a metal tube.

The swaging process for metal tubes involves squeezing the end or part of the metal tube while plastically deforming it.
This is done by gradually reducing the outer diameter of a metal tube and forming it into the desired shape.

Figure 3 shows metal tube 1 after swaging process.
It shows various deformations of the .

FIG. 3a shows a state in which a parallel portion 1a is formed at the end of the metal tube 1 by parallel swaging, and between this parallel portion 1a and the metal tube 1,
An appropriate tapered portion 1b is formed.

Figure 3b shows that by taper swaging,
A state in which a tapered portion 1c is formed at the end of the metal tube 1 is shown.

FIG. 3c shows a state in which a recess 1d is formed in a part of the metal tube 1 by intermediate swaging.

In order to perform the various swaging processes described above, parallel swaging dies 2a, 2b,
Dice 3a, 3b for taper swaging,
and dies 4c, 4b for intermediate swaging
are prepared in pairs, and a hole having the same shape as the outer periphery of the deformed portion of the metal tube 1 is formed inside each die.

When performing parallel swaging, metal tube 1
Gradually insert the ends of the dies 2a, 2b through the openings on the large diameter side, and while rotating either the dies 2a, 2b or the metal tube 1 at high speed, insert the ends of the , the circumferential surface of the metal tube 1,
Hit repeatedly.

Taper swaging can be performed by using dies 3a and 3b in the same manner as described above, and intermediate swaging can be performed by aligning dies 4a and 4b with the required positions of metal tube 1. It will be done.

FIG. 1 shows the main parts of a conventional rotary swaging device.

Parallel swaging dies 2a and 2b are detachably mounted on the inner surfaces of a pair of operating members 5 and 6 mounted on a main shaft (not shown).

The actuating members 5 and 6 rotate in the direction of arrow 8 about the axis 7 of the main shaft, and peripheral surfaces 5a and 6a about the axis 7 are formed on the outer surfaces of the actuating members 5 and 6.

A plurality of pressure rollers 10 , 11 , 12 are arranged symmetrically about the axis 7 outside the actuating members 5 , 6 . Axis 7 and pressure roller 1
The distances from the respective axes 0, 11, and 12 are maximum for the pressure roller 10;
The numbers gradually become smaller in the order of 1 and 12.

Therefore, when the actuating members 5, 6 rotate in the direction of arrow 8, their peripheral surfaces 5a, 6a are sequentially pressed by the pressure rollers 10, 11, 12, so that the actuating members 5, 6 and the die 2b, 2a
reciprocates in the direction normal to the axis 7, as indicated by the arrows.

When the metal tube 1 is rotated and gradually inserted into the openings of the dies 2a and 2b as shown by the arrow 13, the tip of the metal tube 1 is inserted into the openings of the dies 2a and 2b.
b is repeatedly hammered and swaged into the shape of the parallel portion 1a as shown in FIG. 3a.

Generally, in a rotary swaging device, the rotational action of the actuating members 5, 6, i.e.
The striking action of dice 2a and 2b is 3000 to 5000 per minute.
Times are being done at high speed.

The conventional swaging device explained with reference to FIG. 1 has advantages such as fast machining speed and smooth finished surface, but the rotating part consisting of actuating members 5, 6, dies 2a, 2b, etc. There is an inconvenience that the weight is too large.

That is, since the position of the center of gravity of the rotating part is slightly far away from the axis 7, the moment of inertia of the rotating part becomes a considerably large value, and the operating member 5,
6 and the supporting mechanisms (not shown) for the dies 2a and 2b are bulky, resulting in an expensive device.

Further, since the circumferential surfaces 5a, 6a of the actuating members 5, 6 are brought into contact with and separated from the circumferential surfaces of the pressure rollers 10, 11, 12 repeatedly at high speed, the problem of large noise during the swaging process is avoided. be.

FIG. 2 schematically shows a conventional non-rotary swaging device.

The pair of dies 2a and 2b are connected to the swing lever 1.
It is detachably attached to the upper end portions of 5 and 16. The swinging lever 15, which is pivotally connected to the main body 18 by a shaft 17, is connected to the lower end of the lever 15 and the main body 18.
and a tension spring 1, each end of which is respectively locked.
The elastic force of 9 provides a clockwise rotational habit around the axis 17. The other swinging lever 1
6 is similarly supported and given a counterclockwise rotational habit.

One end of the short arm 21 is connected to the swing lever 15 by a shaft 22.
The other end is pivotally connected to an eccentric shaft (not shown) provided on the main shaft 23.
The main shaft 23, which is pivotally supported by the main body 18, is rotated by a drive section (not shown), and the swing lever 15 swings around the shaft 17 each time it rotates.

The other swing lever 16 is also the same as the above swing lever 15.
The oscillating operation is performed in synchronization with the oscillating operation of the main shaft 23, and the dies 2a and 2b open and close each rotation of the main shaft 23 to perform swaging processing on the metal tube 1.

In this non-rotary type swaging device, the striking action of the dies 2a, 2b against the metal tube 1 is performed by the rotation of the eccentric shaft.
It has the advantage of low noise and vibration during processing.

However, the number of strikes of the dies 2a and 2b per minute is 400 to 1000 times, which is considerably less than the number of strikes of a rotary swaging device, and therefore there is a disadvantage that processing efficiency is poor.

The object of the present invention is to eliminate the above-mentioned drawbacks of the conventional method by reciprocating a pair of actuating members each having a pair of dies provided at the inner ends in synchronization in different directions of movement. An object of the present invention is to provide a swaging device for metal tubes.

The present invention will be explained below with reference to embodiments shown in the figures from FIG. 4 onwards.

In FIG. 4, a pair of actuating members 31, 32 are slidably supported by support members 26, 27 and 28, 29 whose bases are fixed to the upper part of the main body 25. The actuating members 31, 32 are arranged on one line, and a pair of dies 2a, 2b is detachably attached to each inner end of the actuating members 31, 32.

The actuating member 31 is moved outward as shown by an arrow 35 by the elasticity of a tension spring 34 whose one end is locked to the support member 27 and the other end is locked to a pin 33 fixed to the die 2a. They have a habit of moving to.

Similarly, the actuating member 32 is given the tendency to move in the direction of the arrow 38 by the elasticity of a tension spring 37 whose ends are locked to a pin 36 fixed to the die 2b and a support member 28. There is. A plurality of such tension springs 34, 37 are provided as necessary.

located outside the actuating members 41 and 42;
A pair of mutually parallel drive shafts 33 and 34 are connected to the main body 25.
They are pivotally connected to bearings 43 and 44, respectively, which are fixed to the upper part of the holder. The outer end surfaces of the actuating members 31, 32 are pressed against the circumferential surfaces of the cams 45, 46 fixed to the drive shafts 41, 42, respectively, by the elasticity of the tension springs 34, 37, respectively.

The cams 45 and 46 are fixed to the drive shafts 41 and 42 with their phases shifted by 180 degrees. Therefore, the protrusions 45 of the cams 45, 46
a and 46a have a 180° phase difference.

A drive pulley 49 is fixed to an output shaft 48 of a drive motor 47 provided in the main body 25, and driven pulleys 51, 52 are fixed to each end of the drive shafts 41, 42, respectively.

Timing bands 53 and 54 are stretched between the driving pulley 49 and the driven pulleys 51 and 52, respectively.
Slips are prevented when transmitting rotational force. As the timing bands 53 and 54, for example, a timing belt or a chain is used as appropriate.

Now, when the driving pulley 49 rotates in the direction of the arrow, the driven pulleys 51, 52 and the cams 45, 4
6 rotate in the same direction as shown by the arrows.

The protrusions 45a, 46a of the cams 45, 46 synchronously push the outer end surfaces of the actuating members 31, 32, so that the actuating members 31, 32 move in the direction of the arrows 55, 56.
As the protrusions 45a and 46a move toward each other as shown by arrows 35 and 38, and as the protrusions 45a and 46a move away from the outer end surface, the actuating members 45 and 46 move away from each other as shown by arrows 35 and 38.

The tip of the metal tube 1 is inserted between the dies 2a, 2b while rotating, and the reciprocating movement of the actuating members 31, 32 causes the peripheral surface of the metal tube 1 to be inserted into the dies 2a, 2b.
The tip of the metal tube 1 is swaged by repeatedly hitting the metal tube 1, and a parallel portion 1a as shown in FIG. 3a is formed at the tip of the metal tube 1.

To perform taper swaging or intermediate swaging on the metal tube 1, special dies 3a, 3b or 4a, 4b shown in FIGS. Just replace it and install it.

If the actuating members 31 and 32 are formed in a drum shape, the weight of the reciprocating members consisting of the actuating members 31 and 32 and the dies 2a and 2b can be reduced.
The drive mechanism consisting of components 5, 46 etc. is made smaller and lighter, and noise and vibration during swaging are reduced.

As described above, the cams 45 and 46 are mounted on the drive shafts 41 and 42 with their mutual phases shifted by 180 degrees. If this phase deviates even slightly, the timing of opening and closing of the dies 2a and 2b will be out of order, causing trouble in the swaging process.

In this embodiment, as a means for transmitting power to the cams 45 and 46, timing belts 53 and 54 made of timing belts, chains, etc. are used as described above.
is used, so the dice 2a and 2b are always opened and closed at normal timing.

FIG. 5 shows another embodiment of the drive system for the drive shafts 41, 42.

a drive pulley 57 fixed to the main shaft 48;
The driven pulleys 51, 52 are driven by endless belts 58, 59 made of materials such as leather, fabric, rubber, etc.
each connected. Driven pulley 51,5
2 are further connected by a timing belt 61, such as a timing belt or chain.

Therefore, the relative phase of the cams 45, 46, which are substantially integral with the driven pulleys 51, 52, is always
It is held at a 180° offset.

FIG. 6 shows yet another embodiment of the drive system for the drive shafts 41, 42.

The drive pulley 49 and the driven pulleys 51, 52 are connected to each other by a single timing band 62 made of a timing belt, chain, or the like.

In this drive system as well, since the drive shafts 41 and 42 rotate synchronously, the relative phase of the cams 45 and 46 is ensured, and the dies 2a and 2b are opened and closed in a normal position, and the metal A swaging process can be performed on the tube.

According to the present invention, a pair of actuating members each having a die for swaging processing at the inner end are arranged in a straight line, and a pair of cams that press the outer end surface of the actuating member are synchronously moved. By rotating the
It becomes possible to reduce the weight of moving parts and simplify the mechanical part during swaging processing, and vibration and noise are reduced.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the main parts of a conventional rotary swaging device, Fig. 2 is a partially cutaway front view of a conventional non-rotary swaging device, and Fig. 3 is a swaging processing section. 4 is a partially cutaway front view of a metal tube swaging device showing one embodiment of the present invention, and FIG. 5 is a front view of another embodiment of the drive system in the above device. FIG. 6 is a front view showing still another embodiment of the drive system. 1...Metal tube, 2a, 2b, 3a, 3b, 4
a, 4b...Dice, 5, 6...Operating member, 7...
...Axis line, 8, 13...Arrow, 10, 11, 12...
...Pressure rotor, 15, 16...Swing lever, 1
7, 22... Shaft, 18... Main body, 19... Tension spring, 21... Short arm, 23... Main shaft having eccentric shaft, 25... Main body, 26, 27, 28, 29...
Supporting member, 31, 32... Operating member, 33, 36
...Pin, 34,37...Tension spring, 35,3
8...Arrow, 41, 42...Drive shaft, 43, 44
... bearing, 45, 46 ... cam, 47 ... drive motor, 48 ... output shaft, 49 ... drive pulley, 51, 52 ... driven pulley, 53, 54 ...
... Timing zone, 55, 56 ... Arrow, 57 ... Drive pulley, 58, 59 ... Endless belt, 61, 62
...timing zone.

Claims (1)

[Claims for Utility Model Registration] (1) Drive pulleys attached to the output shaft of one drive motor are connected to each other via a pair of timing bands, and are driven in the same direction in synchronization at a constant speed. a pair of driven pulleys; each of the driven pulleys is fixed;
A pair of left and right drive shafts are pivotally supported on the frame body in a parallel state, and the inner ends of the cams are opposed to each other, and the outer ends of the cams are in pressure contact with the circumferential surfaces of the cams that are respectively fixed to the drive shafts. a pair of actuating members that can reciprocate toward or away from each other according to the rotation of the actuating members; Swaging a metal pipe by repeatedly striking the part 1
Metal tube swaging processing device consisting of a pair of dies. (2) The drive pulley and the driven pulley are connected by an endless belt made of leather or fabric, and each driven pulley is connected by a timing belt made of a timing belt or chain, etc., and a pair of cams are connected. A swaging processing apparatus for a metal tube according to claim (1) of the registered utility model, characterized in that the apparatus rotates synchronously. (3) Utility model registration claim No. (1) characterized in that the driving pulley and each driven pulley are connected by one timing band so that a pair of cams are rotated synchronously. A swaging processing device for metal tubes as described in Section 1.