JPS6146215B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a press mold that can be easily replaced.

Conventional press dies, especially press dies consisting of an upper die with an upper curved edge for pre-clinching and hemming, and a lower die with a lower curved edge, have guide posts erected at the four corners of the lower die. The upper mold is slidably guided by the post and die-set, making it easy to replace the mold. However, in order to make it easier to carry in and out of materials and molded products when the upper and lower molds are open, a lifter, etc. that is moved up and down by an air cylinder is built into the lower mold, and the rising and falling ends of the lifter, etc. A limit switch was provided to check.

If an air cylinder or a limit switch is provided in a press mold to be replaced in this manner, it is necessary to change the connection to the air source for driving the air cylinder and to change the connection to the limit switch signal line each time the mold is replaced. In the past, a quick joint was used to transmit the power of the cylinder drive, and a metal outlet was used to transmit the limit switch signal, and these connections were changed manually by the operator.

For this reason, automatic exchange of press dies is impossible,
Manual setup changes were required, which increased the idle time required to change molds and reduced operating rates.

In view of this problem, the present invention eliminates the cylinder and limit switch from the press die, and aims to achieve die change without manual setup change.

Embodiments of the present invention will be described below based on the drawings. FIG. 1 shows the configuration of a press die 20 according to the present invention and a press machine 10 suitable for applying this press die 20. This press machine 10 has a base 12 supported by struts 11.
, a crown 14 fixed to the upper end of a guide bar 13 erected at the four corners of this base 12 , and a platen 15 guided by the guide bar 13 and movable up and down.
and a cylinder 16 fixed to the base 12 and used to raise and lower the platen. A press die 20 consisting of a lower die 21 having an upper curved edge and a lower die 22 having a lower curved edge is inserted between the crown 14 and the platen 15, and the upper die 21 is connected to the crown 14.
A roller 26 that rolls on the upper surface of a guide rail 27 provided on the lower surface of the roller 26 is rotatably supported, and is guided and supported so as to be movable along the guide rail 27. Guide posts 23 are provided hanging down at the four corners of the upper mold 21, and the lower mold 22 is attached to the guide posts 23.
A guide sleeve 25 integral with the guide sleeve 25 is guided.
The lower end of the guide post 23 is a guide sleeve 25
A locking plate 24 is fixed to the lower end of the guide post 23, and the lower end surface of the guide sleeve 25 engages with the locking plate 24 to restrict the open end of the lower mold 22 relative to the upper mold 21. has been done.

In this way, the upper mold 21 is supported via the guide rail 27 with respect to the fixed crown 14, and the upper mold 2
1, a lower mold 22 is supported in a suspended state via a guide post 23 and a locking plate 24. Therefore, due to the action of gravity, the pair of upper and lower molds 21 and 22 are in a normally open state, and when the platen 15 is located at the lower end, the lower surface of the crown, that is, the space between the upper mold supporting surface 14a and the upper mold upper surface 21a. A minute gap is formed between the upper surface of the platen 15, that is, the lower die support surface 15a and the lower die lower surface 22a. These gaps disappear as the platen 15 rises, and the upper die 21 finally reaches the upper die support surface 14.
In a, the lower mold 22 is received on the lower mold supporting surface 15a, and molding pressure is performed by a pair of upper and lower press molds 20.

2 and 3 illustrate the characteristic parts of the lower mold 22, and in the first embodiment, as the lower mold 22 descends, a lifter 30 is activated to lift the workpiece W from the lower molding surface. It is something that makes you This lifter 30 has a plurality of rubber rollers 3 that support the workpiece W.
1 is supported on a shaft, and can be raised and lowered while maintaining a horizontal state by means of parallel links 32 and 33. The upper ends of the parallel links 32 and 33 are pivotally connected to a horizontal bar 34 forming a part of the lifter 30 at pivots 35 and 36, and the lower end of one link 32 is connected to a pivot 38 to a bracket 37 provided on the lower die 22. The lower end of the other link 33 is fixed to a rotating shaft 40 that passes through the lower die 22 and is supported by a bracket 39. A rotating arm 41 is protruded from one end of the rotating shaft 40, and a locking pin 42 is provided at the tip of the rotating arm 41. Rotation axis 4
0, the rotating arm 41, and the locking pin 42 constitute a linking mechanism, and this linking mechanism is all provided on the lower die 22. A swing link 4 rotatably supported on the lower die 22 by a pivot 43 is attached to the locking pin 42.
A hawk-shaped locking portion 44a at one end of the 4 is engaged.
At the other end of this swing link 44 is a follower roller 4.
5 is pivotally supported, and this follower roller 45 comes into contact with the upper surface of a block 46 projecting from the locking plate 24. In the state shown in FIG. 2, the lower mold 22 is located at the lower end, so the block 4
The pivot 43 is located below the upper surface 46a of 6. Therefore, the swing link 44 is rotated counterclockwise due to the contact between the follower roller 45 and the block 46, causing the rotation arm 45 and the rotation shaft 40 to rotate clockwise. This allows parallel link 3
2 and 33 stand up to the solid line position, raising the lifter 30. As the lifter 30 rises, the molded product W supported on the lower molding surface is moved to the rubber roller 31.
Support it and lift it to a height where it can be carried out. Thereafter, the molded product W is transferred to the right in FIG. 2 by a kicking device (not shown) and taken out. Further, an unformed workpiece is supported on the rubber roller 31 of the lifter 30 and carried in from the left side. A stopper 49 is protruded from the workpiece transfer path after the molded product is carried out, and the workpiece W is brought into contact with this stopper 49 and positioned. From this, the platen 15 is raised and the press molding process is started. As the platen 15 rises, the lower die 22 rises, and the upper surface 46 of the block 46
The pivot 43 moves upward from point a. As a result, the weight of the workpiece W and the lifter 30 causes the swing link 44 to rotate clockwise, lowering the lifter 30 downward. As the lifter 30 descends, the workpiece W is supported on the molding surface of the lower die 22, and the lifter 30 separates from the workpiece W and continues to descend until it reaches the state shown by the two-dot chain line and stops. Lower mold 22 after this
Due to the rise of the fluoro roller 45, the block 46
is separated from the upper surface of the material W, and pressure molding of the material W is performed.

In the second embodiment, a stopper 50 for preventing the workpiece W from rebounding is moved forward and backward. The rebound prevention stopper 50 is provided on the carry-in side of the workpiece W (on the left side in FIG. 2), and is located at the solid line position shown in the figure, where it is supported by the lifter 30 located at the rising end and prevents the workpiece W that collides with the stopper 49 from rebounding. During press molding due to the rise of the lower die 22, the lower die 22 can be retracted to a position indicated by a chain double-dashed line where it does not interfere with the upper die 21. The stopper piece 51 is rotatably supported on the upper end of the swing link 52 by a pivot 53, and the workpiece contact surface 51a at one end of the stopper piece 53 is attached to the pivot 53.
A weight 54 is fixed to the other end so as to be located above 3, and is in contact with a stopper pin 55.

The swing link 52 is fixed to one end of a rotating shaft 58 that is rotatably supported on brackets 56 and 57 provided on the lower mold 22, and is swingably supported around the rotating shaft 58 as a support shaft. ing. The other end of the rotation shaft 58 projects outside the lower mold 22, and a rotation arm 59 is fixed to this. A follower roller 60 is rotatably supported at the tip of the rotating arm 59, and the follower roller 60 is adapted to engage with the upper surface 61a of a block 61 projecting from the locking plate 24.

In the illustrated state in which the lower die 22 is at the lower end, the block upper surface 61a pushes up the follower roller 60, rotates the swing link 52 clockwise, and positions the stopper piece 51 at the upper end. When the workpiece W is brought in in this state, the stopper piece 51
The upper surface of the right end of is pushed down by the workpiece W,
The workpiece W passes over the stopper 50. When the workpiece W has completely climbed over the stopper piece 51, the right end portion of the stopper piece 51 returns and rises to prevent the workpiece W, which is bounced off by the stopper 49, from retreating. When the lower die 22 rises, the rotating arm 59 and the swinging link 5
2 rotates counterclockwise to release the stopper piece 51 to the position indicated by the two-dot chain line, thereby preventing interference with the upper die 21.

According to the present invention, it is possible not only to operate the lifter and the stopper for preventing rebound, which are incorporated in the lower mold and move forward and backward in relation to the relative movement of the upper mold and the lower mold, without an actuator, but also by using a link mechanism. Since it is mechanically linked to the movement of the upper and lower molds, there is no need for a limit switch to confirm operation.
Therefore, there is no need to change the connection using a quick joint or a metal outlet when replacing the mold, so it has the advantage that the mold can be easily replaced without manual setup changes.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 shows a state in which a press type is attached to a press machine, and
The figure is a longitudinal cross-sectional view of the lower mold taken along the center line, Figure 3 is a plan view of the lower mold on one side of the center line, and Figure 4 is a vertical cross-sectional view of the lower mold taken along the center line.
The figure is a sectional view taken along the - arrow in FIG. 3. 21... Upper die, 22... Lower die, 23... Guide post, 24... Locking plate, 25... Guide sleeve, 30... Lifter, 32, 33... Parallel link, 40... Rotating shaft , 41... Rotating arm, 44
...Swinging link, 45...Fuoro Arora, 46
...Block, 50...Rebound prevention stopper,
51... Stopper piece, 52... Swing link, 54
... Weight, 58 ... Rotating link, 59 ... Rotating arm, 60 ... Fluoro roller.

Claims (1)

[Claims] 1. A guide post is provided hanging down and protruding from an upper die having a curved edge for the upper die, a lower die having a curved edge for the lower die is slidably guided by the guide post, and the lower end of the guide post passing through the lower die is A locking plate is fixed, and a swinging link whose one end engages with the locking plate is rotatably pivoted to the lower mold, and the swinging link moves based on the lifting and lowering movements of the upper mold and the lower mold. A press mold that can be easily replaced by disposing a linking mechanism in the lower mold that transmits the information to an operating body such as a lift device provided in the lower mold and moves it forward and backward without interfering with the upper mold.