JPS62173097A - Press machine - Google Patents

Abstract

PURPOSE:To improve the manufacturing accuracy of a product in the stage of a high-speed operation by providing a slider to an oscillating arm of which one end is supported movably around the other end side as a fulcrum in a vertical direction and transmitting the movement of the oscillating arm via the slider and connecting rod to a slide table. CONSTITUTION:The one end part 21 side of the oscillating arm 20 oscillates vertically around the pin 41 on the other end side as a fulcrum when an eccentric ring 25 rotates. The slider 29 moves vertically according to such oscillation and therefore, the connecting rod 31 connected to the slider 29 is vertically moved. The connecting rod 31 is guided in this stage by a guide bushing 34 and is moved only in the vertical direction, by which a plate 5 connected to the connecting rod 31, a guide rod and the slide table 4 are simultaneously moved upward and downward. An upper did 3 moves eventually vertically with respect to a lower die as the slide table 4 moves vertically. Since the connecting rod 31 moves only in the vertical direction, the exertion of the force in the horizontal direction to the upper die mounted to the slide table 4 iis obviated.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a press machine that is capable of manufacturing thin products with high precision.

``Prior Art'' Conventionally, as an oropress machine for producing thin products such as lead frames of IC chips and floppy disks, the machines shown in the second section are known.

In Fig. 2, ζ, symbol I is the bolster on which the lower mold 2 is attached on two sides. This bolster 1-
1. On one side, a slide table 4 is placed on the lower surface of the upper mold 3, and a rod plate 5 is placed below the bolt I. Bolster A hole 6 is formed in the hole 6, and a guide rod 7.7 is fitted into the holes 6, 6 so as to extend in the bidirectional direction through the bolster I.Guide rod 7 ．．
The two ends of 7 are fixed to the slide table 4,
The lower end portion is fixed to the plate 5. Guy F Lot I
7.7 is supported by roller guide brackets 8, 8, . . . so that it can move only in the downward direction.

On the other hand, a J-4" pulley wheel 9 is provided below the plate 5 and is rotatably driven by a drive source (not shown). One end of the connecting rod II is connected to the plate 5 through a pin 10. The flywheel 9 can be moved freely.
The bin 12 is located at a certain distance from its central axis.
The lower end of the connecting rod 11 is rotatably attached via the 17
j is being kicked.

This press machine converts the rotary motion of a flywheel 9 into a linear motion by a connecting rod 11 to move the plate 5 up and down, and transmits this motion to the slide tiple 4 via a guide rod 7.7, thereby lowering the -1- for mold 2
The mold 3 is moved downward by two degrees.

"Problems to be Solved by the Invention" The problems to be solved by the present invention are the following problems that occur in the press machine as described above. That is, in the press machine described above, the rotational motion of the flywheel 9 is converted into linear motion by the connecting rod 11 to move the slide table 4 up and down. With this configuration (11), due to the rotational movement of the lower end of the connecting rod 11, the horizontal component force acting on the connecting rod 11 is transmitted to the slide table 4 via the plate 5 and Gaitro Sodore 7, Eventually, a horizontal force and a force in the direction will be applied to the upper die 3.This horizontal component force applied to the upper die 3 is extremely small when the press machine is operated at low speed, but this When the press machine is operated at high speed, it generates a large force, which greatly affects the manufacturing accuracy of the product.Therefore, the press machine described in "-" had a problem in that the dynamic accuracy deteriorated during high-speed operation.

``Means for Solving the Problems'' Among the present inventions, the first invention is to arrange a slide table in which a lower mold is attached to the upper surface of the bolster and a stopper mold is attached to the lower surface of the bolster. A swinging arm is provided on either side or below the bolster and the slide table, and one end of the swinging arm is supported so that it can move vertically using the other end as a fulcrum. A slider is provided which is movable in the direction between the ends of the swinging arm, and this slider and a slide table and a member connected to the slide table are connected by a connecting rod,
A drive mechanism is provided for moving the swing arm in one direction, up and down, using the other end as a fulcrum.

Further, a second invention provides, in addition to the constituent features of the first invention, a die height adjustment mechanism that changes the vertical position of a member that supports the other end of the swing arm. .

Embodiment FIG. 1 is a diagram showing an embodiment of the present invention. In this figure, the same elements as those shown in FIG. 2 are designated by the same reference numerals. Note that explanations of the same component parts as those shown in FIG. 2 will be omitted.

The main difference between the press machine shown in FIG. 1 and the press machine shown in FIG. 2 is the structure of the drive section of the slide table 4.

In other words, a swing arm 20 is disposed in this press machine so as to extend below the plate 5 in a substantially horizontal direction. The swinging arm 20 is supported such that one end 21 thereof can move vertically using the other end 22 as a fulcrum. This swinging armoire 20 has a large diameter hole 23 formed at one end 21 thereof, and an roller guide recess 24 extending in the direction between the ends 21 and 22 at the center in the length direction. . An eccentric ring 25 is arranged in the hole 23 at a constant distance from the wall surface of the swing arm 20, and between the wall surface and the outer peripheral surface of the eccentric ring 25 are a number of bear links 26.
26... are interposed in a state where they are prevented from being pulled out. A main shaft 27 is fixed to the eccentric wheel 25 at a position eccentric from its central axis and is rotationally driven by a drive source (not shown). Based on this +14 configuration, the swing arm 20 moves vertically and horizontally when the eccentric wheel 25 rotates together with the main shaft 27. Therefore, the eccentric wheel 25, the main shaft 27, and the driving source are the swing arm 20.
- It constitutes a drive mechanism 28 that moves in the directions indicated below.

In addition, two sliders are arranged in the guide recess 24 of the swing arm 20 at a constant distance from the upper and lower wall surfaces of the swing arm 20, and between the upper and lower wall surfaces and the F surface of the two sliders. A large number of bearings 30, 30, . Based on this configuration, the slider 29 is movable within the guide recess 24 in the direction between the ends 21 and 22 of the swing arm 20. The plate 5 and the slider 28 are connected by a connecting rod 31. That is, pins 32 and 33 are fixed to the plate 5 and the slider 28, respectively, and the connecting rod 3 is attached to these pins 32 and 33.
The upper and lower ends of (2) are rotatable (t IJ).

In this case, the connecting rod 31 is restricted from moving sideways by the connecting rod guide bush 34, and can only move downward.

On the other hand, an adjustment bolt 37 is attached to a frame 36 disposed on one side of the plate 5 marked - in a rotatable but immovable manner in the directions of arrows A and B. This adjustment bolt 3
A 17-shaped adjustment arm 38 is screwed onto the threaded portion 7 so as to be non-rotatable and movable in the directions of arrows A and B. Two ends of a connecting rod 39 are rotatably connected to the lower end of the adjustment arm 38 via a pin 40.
The lower end of the swing arm 20 is rotatably connected to the other end of the swing arm 20 via a pin 4I. Based on this configuration, when the adjustment bolt 37 is rotated, the adjustment arm 38 moves in the directions of arrows A and B, and the two ends of the connecting rod 39 move in the same direction, thereby causing the swinging The other end of the arm 20 moves downward. The other end of this swing arm 20
Each member that is moved downward constitutes a die-high adjustment mechanism 41.

Next, the operation of the press machine having the above configuration will be explained.

To operate this press machine, the lower die 2 and upper die 3 are attached to the bolster 11 and the slide table 4, and the die height is adjusted (this adjustment will be described later), and then the drive source (not shown) is activated. to rotate the main shaft 27 and the eccentric wheel 25. When the eccentric wheel 25 rotates, the one end 21 side of the swing arm 20 swings in the vertical direction about the pin /II as a fulcrum. At this time, the swinging arm 20 is
The three connecting arms are swung using the fulcrum as a fulcrum while also swinging in the horizontal direction. When the swinging arm 20 swings in the vertical and horizontal directions, the slider 29 disposed in the guide recess 24 of the swinging arm 20 moves up and down, causing the connecting rod connected to the slider 29 to move up and down. 31
moves up and down. At this time, the connecting rod 31 moves only in the downward direction by being guided by the connecting rod guide bush 34. In addition, since the swing arm 20 swings in the horizontal direction, the slider 29 has the end portion 21,
relative movement in the direction between 2 and 2. When the connecting rod 31 moves up and down, the plate 5, the guide rod 7.7, and the slide table 4 move downward by 2" in conjunction with this rod 31, and the upper mold 3 moves up and down relative to the lower mold 2. do.

As mentioned above, in this press machine, the eccentric wheel 25
When the swinging arm 20 is rotated to swing vertically and horizontally, the slider 29 moves relative to the ends 2+ and 22 of the swinging arm 20, so that the connecting rod 31 moves vertically. Almost no horizontal force is applied. Therefore, in this press machine, almost no horizontal force is applied to the guide rod 7.7, slide table 4, and upper die 3, so the stop die 3 is fixed relative to the lower die 2 even during high-speed operation. It can be accurately rolled down to the desired position.
Products can be manufactured with high precision. Moreover, in this press machine, since no horizontal force is applied to the guide rods 7.7 that move up and down, these lots 7.7 move smoothly inside the bushes 8.8, and these rods 7.7 move smoothly.
7 can be prevented from being scratched.

In addition, in this press machine, between the eccentric wheel 25 and the swing arm 20, and between the slider 29 and the swing arm 20,
Bearings 26, 26..., 30.30.
・Since these parts are interposed, the heat generated in these parts can be suppressed to a minimum. Further, since the connecting rod 31 hardly rotates with respect to the pin 32, almost no heat is generated in these connecting parts. Further, since the rotation range of the connecting rod 31 relative to the pin 33 is small, the heat generated in these connecting portions is extremely small. Here, the occurrence of odor occurs between the connecting rod 31 and the pins 32, 33 and in the vicinity.
The fact that this is small has an important meaning. That is, the small amount of such heat can prevent thermal expansion of the connecting rod 31, and maintain the positional relationship between the molds 2 and 3 (bottom dead center accuracy of mold 3) accurately. be able to. In addition, the fact that less heat is generated between the connecting rod 3I and the pins 32 and 33 means that the gaps between these connecting parts can be set small, preventing rattling between each member, and improving accuracy. It is possible to aim for two directions.

Further, in order to adjust the die height in the above press machine, the bolt 37 is operated. That is, when the port 37 is rotated, the arm 38 moves in the directions of arrows A and B, and the pin 40 moves in the same direction.
changes the vertical position of the end portion 22 of the swing arm 2o. When the position of the end 22 of the swinging arm 20 changes,
The lower position of the slide table 4 is changed via the connecting rod 31, thereby adjusting the die height.

Note that this invention is applicable not only to the case where the driving part of the slide table is located below the bolster as in the above embodiment.
The present invention can also be applied to a press machine in which the drive section is arranged above the bolster and the slide table.

``Effects of the Invention'' According to the present invention, a swing arm is disposed on one side or below of the bolster and the slide table, and the swing arm is supported so that one end thereof can move downward with the other end as a fulcrum. The swing arm is provided with a slider that is movable in the direction between the ends of the swing arm, and the slider and the slide table or a member connected to the slide table are connected by a connecting rod. Therefore, when the swinging arm is swung vertically using the other end as a fulcrum, the connecting rod is moved only in the vertical direction by relatively moving the slider between both ends of the swinging arm. As a result, no horizontal force is applied to the upper mold that is attached to the slide table. Therefore, even when operating at high speed, the rolling motion of one mold is performed only in a predetermined state, and dynamic precision can be improved. For this reason, the press machine according to the present invention is suitable for products that require high precision, such as ICs.
It is suitable as a press machine for manufacturing thin products such as chip lead frames and floppy disks.

[Brief explanation of drawings]

FIG. 1 is a partially sectional side view of a press machine shown as an embodiment of the present invention, and FIG. 2 is a partially sectional side view of a conventional press machine. 1... Bolster, 2... Lower mold, 3... Upper mold,
4...Slide table, 20...Swing arm, 2
1.22... End of swing arm, 28... Drive mechanism, 29... Slider, 31... Connection rod, 41...
...Die height adjustment mechanism.

Claims (2)

[Claims] (1) A bolster to which the lower mold is attached to the upper surface; a slide table supported vertically movably above the bolster and to which the upper mold is attached to the lower surface; , a swinging arm supported so that one end thereof can move vertically with the other end as a fulcrum, and a slider supported by the swinging arm so as to be movable in the direction between the ends of the swinging arm. and a connecting rod having one end rotatably attached to the slider and the other end rotatably attached to the slide table or a member connected to the slide table; A press machine comprising a drive mechanism that moves vertically using an end as a fulcrum. (2) A bolster to which the lower mold is attached to the upper surface, a slide table supported vertically movably above the bolster and to which the upper mold is attached to the lower surface, and a bolster and the slide table disposed above or below the slide table. , a swinging arm supported so that one end thereof can move vertically with the other end as a fulcrum, and a slider supported by the swinging arm so as to be movable in the direction between the ends of the swinging arm. and a connecting rod having one end rotatably attached to the slider and the other end rotatably attached to the slide table or a member connected to the slide table; A press machine comprising: a drive mechanism that moves the swing arm vertically using the end as a fulcrum; and a die height adjustment mechanism that changes the vertical position of a member that supports the other end of the swing arm. .