JP3024930B2 - Material forcing machine of forging machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for pushing a material held between transfer fingers of a forging machine into a die.

[0002]

2. Description of the Related Art In a forging machine, a material which is held by a transfer finger and conveyed immediately before a die is pushed by an advancing punch, and when a part of the material is fitted into the die, the transfer finger is opened and further moved. Forging is performed between the punch and the die that are moving forward.However, if the material is short, if the transfer finger opens early, the material will fall off and the punch and die will be hit by the blank and damaged, If the opening timing is too late, the transfer finger will be pressed by the punch and will be damaged, so it is necessary to finely adjust the transfer finger opening timing.If the length of the material is not more than a certain dimension than the thickness of the transfer finger, We could not forge.

[0003]

The problem to be solved by the present invention is that it is extremely difficult to adjust the opening timing of the transfer finger in the forging of a short material,
In addition, a material having a length less than a certain length cannot be forged.

[0004]

Means for Solving the Problems, Functions and Effects As means for solving the above problems, the invention of claim 1 is an apparatus for pushing a material sandwiched between transfer fingers of a forging machine into a die, comprising: A drive rod that moves forward and backward in a direction perpendicular to the pushing direction of the push rod, an operating body connected to the drive rod by two links so as to form a parallel link mechanism, and an operating body separated from the drive rod. When the pushing spring attached to the frame and the push rod attached to the end portion of the operating body reaches the coaxial position with the die, the spring comes into contact with the engaging surface parallel to the pushing direction of the material formed on the operating body. When the drive rod is in the retracted position, the link is raised by the bias of the spring, and the operating body is moved along with the push rod into the die at the side of the die. When the driving rod moves forward and the engaging surface comes into contact with the stopper, the push rod reaches the coaxial position with the die, but the axial distance between the die and the push rod changes. When the drive rod is further advanced, the operating body is further prevented by the engagement surface being in contact with the stopper, so that the link is inclined against the bias of the spring, and the operating body is disengaged from the die. It moves so as to approach in the axial direction, and the push rod pushes the material sandwiched between the transfer fingers straight from the axial direction, and pushes a part of the material into the die.

[0005] Then, since the transfer finger does not need to be pinched, the transfer finger is opened to release the material, the push rod is retracted together with the drive rod, and then the punch moves forward and the material is pressed against the die to form the material. Since the punch can be pressed after the transfer finger is opened, the short material can be reliably forged without causing interference between the transfer finger and the punch.

According to a second aspect of the present invention, there is provided an apparatus for pushing a material sandwiched between transfer fingers of a forging machine into a die, and an interlocking body connected to a frame by two links to form a parallel link mechanism. A sliding body fitted to the interlocking body so as to be freely slidable in a direction perpendicular to the direction in which the material is pushed, a spring for biasing the sliding body away from the interlocking body and approaching a die, and the sliding body. An engaging member attached to the sliding member and abutting against a stopper surface parallel to the pushing direction of the material formed on the frame when the pushing rod attached to the tip of the sliding member reaches a position coaxial with the die; and a parallel link mechanism. When the parallel link mechanism is almost rectangular, the push rod together with the interlocking body and the sliding body is located at the side of the die. At the position away from the mounting surface of the chair in the axial direction of the die, the drive of the driving member causes the interlocking body, the sliding body and the push rod to move in an arc, causing the parallelogram of the parallel link mechanism to tilt and the engaging body to the stopper surface. When it comes into contact, the push rod reaches the coaxial position with the die, and also approaches the die in the axial direction.When the parallel link mechanism further tilts, the sliding body further advances because the engaging body contacts the stopper surface. Because it is obstructed, only the interlocking body continues the arc motion against the bias of the spring, the sliding body moves so as to approach in the axial direction of the die, and the push rod moves the material sandwiched by the transfer fingers from the axial direction. Press straight and push part of it into the dice.

The following functions and effects are the same as those of the first aspect of the present invention.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIGS. 1 to 3 show an embodiment of the first aspect of the present invention. In the drawings, reference numeral 1 denotes a frame, and a die 3 is fitted to a die block 2 attached to the frame.

A driving rod 4 is provided on the side of the die 3 to advance and retreat in a direction perpendicular to the axis of the die 3. An arm 5 is fixed to the tip of the driving rod 4 by a screw 6, and an operating body 8 is located above the arm 5. Connected by the links 7,7 of the book, the arm 5,
The operating body 8 and the links 7, 7 constitute a parallel link mechanism.

A lower surface of the operating body 8 is formed with two holes 10, 10 and hollow pins 11, 11 which are freely fitted in the holes 10, 10 are mounted in the compression coil spring 9, respectively. , 9 urges the operating body 8 in a direction to push up the operating body 8, and is formed on the upper surface of the operating body 8 at a rolling surface 12 perpendicular to the axial direction of the die 3 and at a right angle to the end thereof. Engagement surface 13 is provided.

Above the operating body 8 of the frame 1 in each of the drawings, a mounting plate 14
A roller-shaped stopper 16 is rotatably supported by a shaft 17 on the mounting plate 14, and the stopper 16 contacts the rolling surface 12 to
Is regulated.

A female thread 18 parallel to the axis of the die 3 is formed at the distal end of the operating body 8. A push rod 19 having an external thread 20 formed on the outer periphery of the female thread 18 is screwed into the female thread 18, and a distal end is formed by a lock nut 21. Is fixed so as to have an appropriate protrusion amount.

Next, the operation of this embodiment will be described.

In the retracted position of the driving rod 4, as shown in FIG. 1, the pushing rod 19 is retracted to the front side of the die 3, and when the driving rod 4 advances, the stopper 16 moves on the rolling surface 12. When the operating body 8 advances while rolling, and as shown in FIG. 2, when the engagement surface 13 hits the stopper 16, the pushing rod 19 reaches the same axis as the die 3. This adjustment is made by the slot 23
This is performed by adjusting the fixed position of the mounting plate 14 according to the above.

When the drive rod 4 is further advanced, the operating body 8 is prevented from further advance by the stopper 16.
As shown in FIG. 3, the compression coil springs 9, 9 are contracted to approach the die 3 straight, and the raw material a which is sandwiched by the transfer fingers b and is transferred just before the die 3.
Is pressed into the die 3, during which the stopper 16 rolls on the engagement surface 13.

When a part of the material a is pushed into the die 3, the transfer finger b opens to release the material a,
Further, after the operating body 8 is retracted, the material a is forged with the die 3 by the advance of a punch (not shown).

Next, an embodiment of the present invention will be described with reference to FIGS.

A block 25 is fixed to a side of a die 42 mounted on a frame 41 by bolts 24 passed through a long hole 43, and the block 25 has two links 2.
6 and 26, an interlocking body 27 is connected to form a parallel link mechanism.
The driving member 28 rotates a support shaft.

The interlocking body 27 has a box-shaped sliding body 2 with an open bottom.
9 is slidably fitted only in a direction perpendicular to the axis of the die 42, and a sliding body 29 is provided between the interlocking body 27 and the sliding body 29.
To the die 42 side.

The arm 31 is provided on the die 42 side of the sliding body 29.
Is fixed by a bracket 32, and a push rod 34 formed of a male screw rod is screwed into an internal thread 33 at an end of the bracket 32, and is fixed by a lock nut 35 at an appropriate protrusion amount.

A stopper 36 having a stopper surface 37 parallel to the axial direction of the die 42 is fixed to the block 25, and a roller-shaped engaging body 39 is rotatably supported on a side surface of the sliding body 29 by a bracket 38. .

Next, the operation of this embodiment will be described.

As shown in FIG. 4, when the driving member 28 is rotated clockwise from the posture in which the links 26, 26 are almost upright, the pushing rod 34, together with the sliding body 29 and the interlocking body 27, is diced along an arcuate path. When the engaging body 39 approaches the stopper surface 37 as shown in FIG. 5, the push rod 34 cannot move forward together with the sliding body 39, and is positioned coaxially with the die 42. This position adjustment is performed by adjusting the fixed position of the block 25 with respect to the frame 41 using the long holes 24.

Further, when the driving member 28 rotates in the same direction, the sliding body 29 moves in the direction approaching the die 42 while the compression coil spring 30 is contracted by the advance of the interlocking body 27, and as shown in FIG. 34 approaches the die 42 straight, pushes the material a which is held by the transfer finger b and is transferred immediately before the die 42, and pushes a part of the material a into the die 42.

The subsequent operation is the same as that of the first embodiment.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view of a retracted state according to an embodiment of the present invention.

FIG. 2 is a partially cutaway side view of the advance state.

FIG. 3 is a partially cutaway side view of the pushed state.

FIG. 4 is a partially cutaway side view of the retracted state according to one embodiment of the present invention.

FIG. 5 is a partially cutaway side view of the advance state.

FIG. 6 is a partially cutaway side view in a retracted state.

[Explanation of symbols]

 1: frame 3: die 4: driving rod 7: link 8: operating body 9: spring 13: engagement surface 16: stopper 19: push-in rod 26: link 27: interlocking body 28: driving member 29: sliding body 30: spring 34: Push rod 37: Stopper surface 39: Engagement body 41: Frame 42: Dice a: Material b: Transfer finger

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-8-252649 (JP, A) JP-A-6-23467 (JP, A) JP-B Hei 7-2259 (JP, B2) 46591 (JP, Y2) Jikgyo 7-35636 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) B21J 1/00-13/14 B21K 1/00-31/00

Claims (2)

(57) [Claims] 1. A device for pushing a material sandwiched between transfer fingers of a forging machine into a die, comprising: a drive rod which moves forward and backward in a direction perpendicular to the material pushing direction; and a parallel link formed by two links to the drive rod. An operating body connected to form a mechanism; a spring for urging the operating body in a direction away from the driving rod; and a push rod attached to a frame and attached to a distal end portion of the operating body. And a stopper that abuts on an engaging surface parallel to a pushing direction of the material formed on the operating body when the material reaches the coaxial position. 2. A device for pushing a material sandwiched between transfer fingers of a forging machine into a die, comprising: an interlocking body connected to a frame by two links to form a parallel link mechanism; A sliding body that is freely slidable in a direction perpendicular to the direction in which the material is pushed, a spring that separates the sliding body from the interlocking body and urges the sliding body in a direction approaching a die, and is attached to the sliding body. When the push rod attached to the tip of the sliding body reaches a position coaxial with the die, an engaging body that comes into contact with a stopper surface parallel to the pushing direction of the material formed on the frame; and the parallel link mechanism swings. A material driving device for a forging machine, comprising: a driving member to be driven;