JP2003080341A - Annular member manufacturing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an annular member of high accuracy without any dispersion in the outside diameter while wastelessly manufacturing the annular member out of a wire. SOLUTION: The wire A is protruded by the predetermined length from a front end opening part 1a of a die 1 capable of moving the wire forward from a fixed position by a feeding means 3, the wire A is held by a holding means 4, and a punch 5 and a punch rod 6 are advanced to the die side in a flush condition with each other, a tip part of the wire A protruded from the front end opening part 1a of the die is headed in a flange shape of the predetermined thickness. In addition, the die 1 is advanced to the punch side with the punch rod 6 stopped at the advanced position, the punch 5 is retracted, a through hole (b) is punched in a central part of a flanged part (a) of the wire A to form the annular member 11. Then, the punch rod 6 is retracted into a punch shaft hole 5a so that the formed annular member 11 is detached from the punch rod 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to an apparatus for manufacturing an annular member such as an annular bearing plate for a thrust bearing or a washer.

[0002]

2. Description of the Related Art Conventionally, as an apparatus for manufacturing a washer without wasting material, for example, one disclosed in Japanese Patent Publication No. 7-67595 is known. The washer manufacturing apparatus disclosed in this publication has a fixed die, a chuck means arranged behind the fixed die for holding a wire rod, a feeding means for feeding the wire rod into the die, and a front end face of the die. Was set up,
A punch that performs a pressing operation toward the die and a punch rod that axially attaches the punch are provided, and after the wire rod is pushed forward by a predetermined length from the front end face opening of the fixed die by the feeding means, the wire rod is chucked. On the other hand, while sandwiching the punch and the punch rod, the punch and the punch rod are advanced to the die side in the same plane, and the wire rod projecting from the die front end face is pressed into a predetermined thickness, and further, the fixed state of the punch rod with the punch is released. The punching punching is actuated toward the center of the forged wire rod, and at this time, the chuck means and the feeding means simultaneously loosen the wire rod appropriately to allow the wire rod to retreat. The through hole is pushed out to form a washer, and then the punch and the punch rod are retracted together, and the punch rod contracts and retracts into the punch shaft hole, and the formed washer is separated from the punch rod. It is configured to be.

According to the above manufacturing apparatus, the washers can be sequentially pressed from the wire material without waste of material.

[0004]

However, in the above-mentioned conventional manufacturing apparatus, when the punch rod is actuated by the punch rod toward the central portion of the pressed wire rod, the chuck means and the feeding means are used. At the same time, it is possible to loosen the clamping of the wire rod at the same time to allow the wire rod to retreat, and to push out a through hole in the center of the wire rod to form a washer, so there is variation in the retracted amount of the wire rod when punching It will be. For this reason, when the wire rod is pushed forward from the front end face opening of the fixed die by the feeding means, the protrusion amounts become uneven, and the punch and punch rod are advanced to the die side, and the wire rod protruding from the die front end face has a predetermined thickness. In addition, when the forging is performed, there is a problem in that it is difficult to obtain a product with high dimensional accuracy because the outer diameter of the product varies.

Therefore, an object of the present invention is to provide an annular member manufacturing apparatus capable of manufacturing an annular member from a wire rod by press forming without waste and obtaining a highly accurate annular member having no variation in outer diameter. .

[0006]

In order to solve the above-mentioned problems, the invention of claim 1 of the present application provides a die, a moving means capable of moving the die forward from a fixed position, and a die positioned at the fixed position. Clamping means arranged rearward, for clamping the wire rod, feeding means for feeding the wire rod to the die, punches arranged facing each other at the front end face of the die and moving back and forth toward the die, and a punch axial hole And a punch rod for punching, which is capable of advancing and retracting relative to the shaft hole, and pushes the wire rod forward by a predetermined length from the front end face opening of the die and then by the holding means. While sandwiching the wire rod, the punch and punch rod are flushed forward to the die side, and the tip of the wire rod protruding from the front end face of the die is pressed into a flange shape with a predetermined thickness, and then only the punch rod is pressed. Stop at the position of the dead point before While moving forward to the punch side and moving the punch backward, forming a circular member by punching a through hole in the center of the collar-shaped portion, and then moving the punch rod backward to retract into the punch axial hole, It is characterized in that the formed annular member is configured to be detached from the punch rod.

Further, the invention of claim 2 of the present application is characterized in that wire rod heating means for heating the wire rod fed to the die is provided between the moving means and the holding means.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a press forming machine for annular members according to the present invention. The die 1 is movably supported by a die holder 10, and the die 1 is fixed from a fixed position.
The moving means 2 composed of an appropriate driving mechanism such as a cylinder that can move forward of 0, and the wire rod A, which is disposed behind the die 1, and protrudes from the front end opening 1a of the die 1 for a predetermined length. Is arranged between the feeding means 3 and the moving mechanism 2, and the feeding means 3 provided with a feeding mechanism (a chuck feeder is used in FIG. 1) such as a chuck feeder or a feeding roller for feeding. Holding means 4 provided with a chuck mechanism for holding the wire A fed by
And a cylindrical punch 5 that is disposed opposite to the front end surface of the die 1 and moves back and forth toward the die 1, and an axial hole 5 of the punch 5.
and a punch rod 6 for punching, which is supported by a and is movable back and forth relative to the shaft hole 5a. Punch 5
The punch rod 6 and the punch rod 6 are punched so that the front end face of the punch rod 6 is flush with the front end face of the punch 5 from the retracted position to the front dead center position for press forming by the drive means 7 as appropriate. 5 is integrally supported in the shaft hole 5a in the retracted state. Then, by the forward movement of the punch 5 and the punch rod 6, the front end of the wire A protruding from the front end face of the die is forged into a collar shape (hereinafter referred to as a collar portion a) having a predetermined thickness, and the molding is completed. Position holding means 8 at the front dead center is provided on the punch rod 6 side so that only the punch 5 can be returned to the retracted position by the driving means 7 while holding the punch rod 6 at the front dead center. . Here, the outer diameter of the punch rod 6 is set to be equal to the inner diameter of the annular member 11 to be press-formed and the outer diameter of the wire A.

After the press forming, the moving means 2 advances the die 1 to the punch 5 side while moving the punch 5 backward while the punch rod 6 is stopped at its front dead center position.
The annular member 11 is formed by removing the through hole b in the center of the collar-shaped portion a, and the feeding means 3 feeds the wire A into the die 1 by a predetermined length, and the wire A is fed to the front end opening of the die 1. It is fed so as to project a predetermined length from 1a. Also,
The nipping means 4 releases nipping at the timing of feeding the wire A into the die 1 by the feeding means 3, and otherwise, that is, when the projecting end of the wire A is press-formed and the brim-shaped portion a is sheared. At times, the wire A is firmly clamped so as not to be displaced. Further, a swing lever mechanism or the like is used as the position holding means 8, and the position holding means 8 moves the die 5 backward while moving the punch 5 backward, thereby moving the die 1 forward toward the punch 5 side.
The punch rod 6 is held at its front dead center until the through hole b is removed in the center, and after the hole is removed, the punch rod 6 is retracted with respect to the punch 5 to remove the hole 5a.
It is designed to move in and out.

Next, the annular member 1 constructed as described above.
The operation of the manufacturing apparatus 1 will be described. First, as shown by the solid line in FIG. 1, the feeding means 3 holds the wire A, and the holding means 4 releases the wire A. From the basic state, the feeding means 3 is moved to the die side and shown by the phantom line in FIG. In this way, the wire A is sent out so that its tip portion projects from the front end opening 1a of the die 1 by a predetermined length. Then, after the feeding is completed, the wire rod A is held by the holding means 4, and after the wire rod A is held by the holding means 4, the feeding means 3 is released and moved backward to the original position.

Next, as shown in FIG. 2, the punch 5 and the punch rod 6 are driven by the driving means 7 to drive the punch 5
A wire rod A which is advanced to the die side with both front end surfaces of the punch rod 6 and the punch rod 6 being flush with each other and protruding from the die front end opening 1a.
The tip of the is forged into a brim shape with a predetermined thickness. At this time, the wire A is firmly held by the holding means 4 so as not to be displaced to the feeding means side.

Thereafter, as shown in FIG. 3, in a state where the punch rod 6 is stopped at the front dead center position by the position holding means 8,
Only the punch 5 is moved backward by the driving means 7, and the die 1 is moved forward by the moving means 2 toward the punch side. As a result, the punch rod 6 forms the annular member 11 by punching the through hole b in the center of the collar portion a. After the through hole b is removed, the feeding means 3 holds the wire rod A as shown in FIG. 4, and the wire rod A is held by the holding means 4 after the holding.
The pinching of is released. At the same time, the die 1 is moved by the moving means 2
While the punch 5 is moved back to the fixed position by the driving means 7, the punch 5 is also moved backward to the original retracted position as shown in FIG. 5, and the punch rod 6 is moved by the position holding means 8 to move the punch 5 to the retracted position. Punch 5 before moving to
Is moved into and out of the shaft hole 5a. By this retracting movement of the punch rod 6, the annular member 11 formed as shown by the phantom line in FIG. 5 is detached from the punch rod 6, dropped and discharged downward, and is accommodated in an accommodating portion (not shown) as appropriate. It will be. The feeding means 3 clamps the wire A, and the clamping of the wire A by the clamping means 4 is released after the clamping.

As described above, when the through hole b is formed in the central portion of the brim-shaped portion a of the wire A to form the annular member 11, the wire A is held by the holding means 4 and moved by the punch rod 6. Since it is carried out by pushing the brim-shaped portion a toward the punch side in the blocked state, the wire A does not move. That is, when forming the through hole unlike in the conventional example, it is not necessary to loosen the chuck means and the feeding means to retract the wire rod to the feeding means side, that is, to let it escape. Therefore, when the through hole b is removed, the wire rod A is removed. Does not change with respect to the die 1. As a result, at the time of feeding by the feeding means 3, the tip end of the wire A can be made to protrude accurately from the front end opening 1a of the die 1 by a predetermined length, and the outer diameter of the collar-shaped portion a, that is, the outer diameter of the annular member 11. It can be formed with high accuracy without any variation, and a highly reliable product can be obtained.

FIG. 6 shows another embodiment. In addition to the embodiment described above, a heater for heating the wire A fed to the die 1 between the moving means 2 and the holding means 4. A wire heating means 9 such as the above is provided to perform the press forming under heat.

When the wire A is heated by the heating means 9 in this way and is then pressure-formed, it is possible to prevent the occurrence of a fault due to double or partial punching and to improve the strength. it can. That is, at the tip of the remaining wire A from which the through hole b has been removed, the flow of the texture of the portion that has been previously forged and work-hardened is different from the original flow direction of the wire A as shown in FIG. It will remain as a directional flow. Then, when the annular member 11 is formed by forging the tip portion and the newly-protruded portion under cold conditions, a plurality of rough and dense faults occur as shown in FIG. High strength cannot be obtained, and the outer peripheral surface is stepped, resulting in poor shape. Therefore, there arises a problem that the place of use is restricted. Therefore, by heating the wire A and forging it under heat, it is possible to obtain the effect shown in FIG.
As shown in (1), it is possible to suppress the occurrence of a fault and to form the outer peripheral surface in a good shape. Particularly, in the annular bearing plate of the thrust bearing and the washer for construction which require high tension, the quenching treatment or the like is further performed.
The operation of the annular member manufacturing apparatus provided with the heating means 9 is the same as that of the previous embodiment, and therefore its explanation is omitted.

[0016]

As described above, according to the present invention, it is possible to obtain a highly accurate annular member having no variation in outer diameter size while it is possible to produce the annular member from the wire by waste forming by waste forming. That is, when the through hole is formed in the central portion of the brim portion of the wire rod to form the annular member, the wire rod is clamped by the clamping means and its movement is prevented by the punch rod, and the punch side of the brim portion is formed. Since it is carried out by pushing into the wire rod, the wire rod does not move, and as a result, the tip end of the wire rod can be accurately projected by a predetermined length from the front end opening of the die when feeding by the feeding means. The outer diameter of the portion, in other words, the outer diameter of the annular member can be formed with high accuracy without variation, and a highly reliable product can be obtained.

If a wire heating means such as a heater for heating the wire fed to the die is provided between the die moving means and the sandwiching means, the annular member can be press-formed under heat. Since it is possible to eliminate the occurrence of faults in the tissue of the annular member due to multiple hits,
The mechanical strength can be improved, and the outer peripheral surface of the annular member can be formed in a good shape.

[Brief description of drawings]

FIG. 1 is a front view of an annular member manufacturing apparatus according to the present invention.

FIG. 2 is a first operation diagram showing a manufacturing process of the manufacturing apparatus.

FIG. 3 is a second operation diagram showing the manufacturing process of the manufacturing apparatus.

FIG. 4 is a third operation diagram showing the manufacturing process of the manufacturing apparatus.

FIG. 5 is a fourth operation diagram showing the manufacturing process of the manufacturing apparatus.

FIG. 6 is a front view of an annular member manufacturing apparatus according to another embodiment.

FIG. 7 is a cross-sectional view showing a press forming streamline of a wire rod after being formed by a cold forming device.

FIG. 8 is a cross-sectional view showing a pressure streamline of an annular member formed by a cold heading device.

FIG. 9 is a cross-sectional view showing a pressure streamline of an annular member by a manufacturing apparatus including a heating device of the present invention.

[Explanation of symbols]

1 die 2 means of transportation 3 sending means 4 clamping means 5 punches 6 punch rod 7 Drive means 9 Heating means 11 annular member A wire rod a Collar-shaped part b through hole

Claims (2)

[Claims] 1. A die, a moving means capable of moving the die forward from a fixed position, and a feeding means disposed behind the die and feeding a wire into the die so as to protrude from the front end opening portion by a predetermined length. And a holding means arranged between the die and the feeding means for holding the wire rod fed by the feeding means, and a punch arranged to face the front end surface of the die and moving back and forth toward the die. And a punch rod for punching, which is supported by the shaft hole of the punch and is capable of moving forward and backward relative to the shaft hole, and the wire rod is pushed forward by a predetermined length from the front end face opening of the die by the feeding means. After that, while the wire rod is sandwiched by the sandwiching means, the punch and the punch rod are flushed to the die side, and the tip of the wire rod protruding from the die front end face is pressed into a collar shape with a predetermined thickness. , Only the punch rod at its pre-dead-center position In the stopped state, the die is moved forward to the punch side and the punch is moved backward to form an annular member by punching a through hole in the center of the collar-shaped part, and then the punch rod is moved backward to move the punch shaft. An apparatus for manufacturing an annular member, characterized in that the annular member is retracted into a hole and the formed annular member is detached from the punch rod. 2. The apparatus for manufacturing an annular member according to claim 1, wherein wire rod heating means for heating the wire rod fed to the die is provided between the moving means and the holding means.