JPH06269893A - Working method and device in swaging machine - Google Patents

Abstract

PURPOSE:To work a highly precise article by controlling the separation and approach of a die by advancing or retiring a backer. CONSTITUTION:When a pulling or pushing force is applied on a backer 5 with a red 9, the backer 5 is advanced (or retired) by a prescribed distance in a time without being pressurized with a hammer roller 3 (in a time of the hammer roller 3 being separated from the backer 5). Because in a time that the hammer roller 3 abuts and presses the backer 5, the backer 5 is not moved, but receives a moving force, so can be instantly moved at the same time of the pressing force of the hammer roller 3 being eliminated. Because the separation and approach of the die is controlled by advancing or retiring the backer, and then the shape and dimension of a workpiece are decided, so the highly precise article can be worked.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a processing method and device in a swaging machine for controlling the processing position of a die during swaging.

[0002]

2. Description of the Related Art Conventionally, in order to control the pressing position of a die during swaging, a hammer roller 3 is used as shown in FIG.
The inner wall of the backer 17, 17 and the dice 18, 1 that come into contact with
There is known a device in which wedge pieces 19 and 19 are interposed between the outer wall and the outer wall of No. 8 (Japanese Patent Publication No. 57-4418).

[0003]

According to the above-mentioned known device, since the wedge piece is interposed in the pressing force transmission system of the hammer roller, six members (two Since it has to go through a hammer roller, two wedge pieces, and two dies, the cushioning effect of these members becomes large, and there is a problem that it is difficult to improve the processing accuracy.

That is, as the number of members increases, the pressing force is buffered by the gap between the members and the distortion of the members. In addition, there was a problem that the noise became louder.

[0005]

However, according to the present invention, since the pressing position of the die is controlled by moving the backer, the conventional problems described above are solved.

That is, the invention of the method is a method of pressing a die through a backer by the rotation and revolution of a hammer roller to process a metal material, and moving the backer in a direction parallel to the metal material to apply the die. It is a processing method in a swaging machine characterized by controlling a pressure position, and a backer is moved by using mechanical drive or fluid pressure.

Further, the invention of the apparatus is a swaging machine in which hammer rollers are interposed between the inner wall of the housing and the outer wall of the die holder at equal intervals, and the backer and the die are sequentially attached to the die holder. Is formed into a wedge shape having an inclined surface, the outer wall of the die and the inner wall of the backer are brought into contact with each other on the inclined surface, and the backer is connected with a reciprocating means in a direction parallel to the traveling direction of the metal material. Is a processing device in a swaging machine. Next, in another invention, the reciprocating means is a fluid pressure cylinder, and the reciprocating means is a screw rod and a nut screwed to the screw rod.

In the fluid pressure cylinder described above, the connecting end of the rod is a free connection for restricting the forward and backward movements of the respective end portions of the set of backers. Therefore, the backer can be moved forward or backward by advancing or retracting the rod by switching the valve of the oil feeding pipe to the fluid pressure cylinder.

As a mechanical reciprocating means, there is a case where a nut is screwed into a screw rod freely connected to a backer and the nut is rotated. For example, if the boss of the gear is a nut, and if a sequence is incorporated so that the gear is rotated by the gear fixed to the shaft of the pulse motor, a complicated pattern tube (or rod) can be processed fully automatically.

The point is that the backer can be moved back and forth in accordance with the progress of the metal material to be processed. Therefore, a known device can be adopted for the back and forth movement of the backer.

Even in the structure in which the die holder is rotated, the object can be achieved by moving the backer in the same manner as described above.

[0012]

In the present invention, the backer is reciprocally moved in parallel with the traveling direction of the metal material, so that the processing position of the die can be controlled without using a wedge piece. Further, when transmitting the pressing force, the number of passing members is reduced, so that the cushioning action due to the gap and the strain is reduced.

[0013]

[Embodiment 1] The hammer roller 3 has an orbital diameter of 250 mm, the hammer roller 3 has a diameter of 150 mm, and the die holder 2 has an outer diameter of 200 mm. Six hammer rollers 3 and one set of dies (see FIG. A metal tube having a diameter of 30 mm was advanced at a rate of 20 mm / sec using a swaging machine having a shape) to form a patterned tube 20 (FIG. 7B) having a large diameter portion 20a and a small diameter portion 20b.

In the above, the backer 5 is attached by the rod 9.
When a force to pull or push is applied (FIG. 3), the backer 5 advances (or retreats) to a predetermined distance when the hammer roller 3 is not being pressed (when the hammer roller 3 is separated from the backer 5). When the hammer roller 3 is in contact with and pressurizing the backer 5, the backer 5 does not move, but since it receives a moving force, the hammer roller 3 can be instantaneously moved at the same time as the pressing force disappears.

Conventionally, a product having the same precision as that obtained by using a plurality of processes or a plurality of swaging machines has been produced.

[0016]

[Embodiment 2] Inner wall of housing 1 and die holder 2
Hammer rollers 3 and 3 are erected at equal intervals between them and the outer wall so that they can rotate and revolve (Figs. 1 and 2).

Backers 5 and 5 and dies 6 and 6 are sequentially installed from the outside into grooves 4 of the die holder 2 which are provided symmetrically in diameter. The contact surface between the backer 5 and the die 6 is parallel to the traveling direction (arrow 11) of the metal material 7 to be processed and is inclined (for example, 4 to 5 degrees).
A pair of base ends of the backers 5 and 5 are constrained to one end of the same joint 8 in the axial direction and the rotation direction, and are freely connected in a direction perpendicular to the axial direction, and the other end of the joint 8 is connected to a hydraulic cylinder. 25
It connects with the rod 9 (FIG. 1). In the figure, 10 is a die 6,
No. 6 thrust receiver (FIGS. 1, 2, and 3).

In the above embodiment, the metal material 7 is advanced as shown by arrow 11 in FIG. 1 and the housing 1 is rotated in the direction of arrow 12 in FIG. 2 (or the die holder 2).
To rotate). In this case, when the outer wall portions of the backers 5, 5 are pressed by the hammer rollers 3, 3, the dies 6, 6 come close to each other as shown by arrows 13, 14 in FIG. You can Then, when the metal material 7 is further advanced, predetermined processing can be performed again with the dies 6, 6. For example, the die of FIG. 1 can be processed into the tapered pipe 24 (FIG. 6).

In the above, as the metal material 7 advances,
When the backers 5, 5 are advanced in the direction of arrow 15 in FIG. 1, the dies 6, 6 are brought closer to each other in the center direction by the pressure of the backers 5, 5, and the metal material 7 is processed to have a small diameter. Contrary to the above, when the backers 5 and 5 are retracted in the direction of the arrow 16 in FIG. 1, the pressurizing position by the backers 5 and 5 is retracted, so the dies 6 and 6 are also machined at the positions retracted outward. The metal material 7 is processed to have a large diameter.

That is, the machining outer diameter of the metal material 7 becomes smaller or larger by the forward or backward movement of the backers 5, 5. Therefore, if the backers 5 and 5 are set to move forward or backward in a sequence and automatically controlled, the same product can be obtained automatically.

For example, a die 22 as shown in FIG.
By using, the patterned tube 20 as shown in FIG. 7B can be molded.

Next, the hammer roller 3 according to the present invention.
Then, the state of the contact portion with the backer 5 will be described.

As shown in FIG. 3, in the backer 5 of the present invention, the arcuate section 5a is accommodated in the groove 4 of the die holder 2 and the outer wall thereof forms a continuous curved surface with the outer wall of the die holder 2 (hence, hammer). Roller 3 can be moved smoothly). However, the central portion of the outer wall of the backer 5 slightly projects from the die holder 2 (that is, has a different curvature), and is deformed to be a flat shape as indicated by S in FIG. When the pressing force is transmitted to the die 6, it is deformed under pressure).

The stress distribution in this case is the average stress P and the maximum stress Pm as shown in FIG. That is, the material is processed by the die 6 with the maximum stress Pm.

As described above, as a result of the backer 5 being deformed under pressure, the axial movement force (direction of arrow 23 in FIG. 1) due to the taper of the contact portion between the inner wall of the backer 5 and the outer wall of the die 6.
Is blocked, the rod 9 of the hydraulic cylinder 25 is
Since consideration for providing a thrust receiver is unnecessary and the backer 5 does not move in the axial direction, there is no fear of lowering the processing accuracy.

When pressurized oil is fed to one side 26a of the hydraulic cylinder 25, the rod 9 moves in the direction of arrow 15 in FIG. 1, and when pressurized oil is fed to the other side 26b of the hydraulic cylinder 25, The rod 9 moves in the direction of arrow 16 in FIG.

That is, the feeding of the pressurized oil can be controlled by switching the valve of the oil feeding system (not shown). Further, the moving amount of the backer can also be controlled by the feeding amount of the pressurized oil.

[0028]

[Effects of the Invention] That is, according to the present invention, the backing and forth of the die is controlled by moving the backer forward or backward,
Since the shape and size of the work piece are determined by this, the number of interposing members from the hammer roller to the die is reduced (same as in conventional ordinary swaging machines), and there is an effect that high-precision products can be processed.

Also, the backer of a swaging machine usually has a shorter service life than other members due to abrasion or the like,
In the present invention, since the use area of the backer is inevitably large, the service life is extended.

Further, as compared with the conventional swaging machine using a wedge piece (FIG. 8), the number of members used is small and the vibration is small, so that the noise is small and the impact action is small, so that the accuracy can be improved. There are various effects such as.

Further, according to the present invention, since the contact portion between the hammer roller and the backer is elastically deformed (surface contact) to generate a large frictional force, even if thrust is generated due to the slope of the backer and the die, The large friction force will sufficiently withstand the thrust. Therefore, there is virtually no axial movement of the backer due to thrust, and there is the effect that the vibration and noise thought to be caused by this are eliminated.

[Brief description of drawings]

FIG. 1 is a front view in which a part of an embodiment of the present invention is omitted and a part is cut.

FIG. 2 is a side view in which a part is also omitted and a part is cut.

FIG. 3 is an enlarged perspective view showing a connected state of the backer and the rod.

FIG. 4 is a partial plan view showing the connection between the backer and the rod.

FIG. 5A is an explanatory view of the contact portion between the backer and the hammer roller. (B) Similarly, a stress distribution diagram of the contact portion.

FIG. 6 is a partial front view of a tapered pipe similarly processed according to the second embodiment.

FIG. 7 (a) is a partial sectional view of the die for the pattern tube. (B) The front view of the pattern tube similarly shape | molded using the die of (a).

FIG. 8 is a front view of a conventional swaging machine with a part omitted.

[Explanation of symbols]

 1 Housing 2 Die Holder 3 Hammer Roller 5 Backer 6 Die 7 Metal Material 8 Joint 9 Rod 10 Thrust Receiver 20 Pattern Pipe 21 Tapered Pipe 22 Die for Pattern Pipe 25 Hydraulic Cylinder

Claims (5)

[Claims] 1. A method of processing a metal material by pressing a die through a backer by the rotation and revolution of a hammer roller, thereby controlling the pressing position of the die by moving the backer in a direction parallel to the metal material. A method for processing in a swaging machine characterized by: 2. The method for processing in a swaging machine according to claim 1, wherein the backer is moved by using mechanical drive or fluid pressure. 3. A swaging machine in which hammer rollers are provided at equal intervals between an inner wall of a housing and an outer wall of a die holder, and a backer and a die are sequentially attached to the die holder, and the backer has an inclined surface on the die side. The outer wall of the die and the inner wall of the backer are brought into contact with each other at an inclined surface, and reciprocating means for moving the metal material in a direction parallel to the traveling direction of the metal material is connected to the backer. Processing equipment for swaging machines. 4. The processing device in a swaging machine according to claim 3, wherein the reciprocating means is a fluid pressure cylinder. 5. The processing device in a swaging machine according to claim 3, wherein the reciprocating means is a screw rod and a nut screwed with the screw rod.