JPH11254200A - Press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve interference between a forming operation and a knockout operation by transmitting a vertically oscillating motion on an oscillating plate to a knockout slider, through a freely rotatable con'rod, as a vertically acting force, and actuating a push-up pin through a lever mechanism provided on the bottom face of a bolster. SOLUTION: An oscillating plate 14 oscillates vertically by the rotation of a swash plate 12. A slider 15 and a knockout slider 51, which are engaged with the oscillating plate 14 through a connecting rod 16, 53, oscillate vertically. A forming operation is performed by an upper die 42 and a lower die 45 which are each attached to the lower end of the slider 15 and the upper face of a bolster 2 respectively. As the slider 15 rises upon completion of forming, the knockout slider 51 lowers, pushing up one end of a lever 59 and pushing down the other end. The knockout pin 43 rises through a push-up pin 57 that is engaged with the other end of the lever 59, and knocks out a formed product from the lower die 45.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a press machine,
The present invention relates to a press machine suitable for forming a cold extruded part, a formed part, a stamped part, and a drawn part with high precision.

[0002]

2. Description of the Related Art As a known technique relating to a conventional press machine of this type, there is, for example, one disclosed in Japanese Patent Application Laid-Open No. 5-309493. According to this known technique, a workpiece is knocked out after being formed by a lower rotating swash plate that rotates via a drive shaft transmitted from a forming force generator.

[0003]

However, the above-mentioned known technology has the following problems. That is, in a press machine equipped with a knockout device according to the above-described known technique, an act of taking out a molded product from a lower mold after molding a workpiece (hereinafter, this act is appropriately referred to as knockout) is transmitted from a molding force generating device as power. A lower rotating swash plate that rotates through a drive shaft, a slipper slidably disposed on the lower rotating swash plate, and a slipper that is rotatably engaged with the slipper, and the lower rotating swash plate is rotated by the lower rotating swash plate. Knockout is performed by a slider that moves up and down with the frame as a guide.

At this time, since the knockout is completed at the top dead center of the lower rotating swash plate, the knockout of each process is performed with a time difference. Further, in a press machine having two or more steps, if the plurality of steps are arranged in a straight line in consideration of the simplicity of conveyance of a molded part between steps, one isosceles triangle is formed within a rotation angle of 180 °. As a result, there are a plurality of knockout strokes, and not only the component parts lack uniformity, but also there is a problem in stroke adjustment for avoiding interference between the molding operation and the knockout operation.

An object of the present invention is to solve the conventional disadvantages and to provide a press machine with good operability.

[0006]

According to the present invention, in order to achieve the above object, the present invention slidably contacts a lower surface of a rotating swash plate which rotates via a drive shaft transmitted from a molding force generator. The vertical swinging motion of the swinging plate in contact is transmitted as a vertical operating force to the slider and the knockout slider via a rotatable connecting rod. The vertical operating force transmitted to the knockout slider is transmitted to a push-up pin in each process by a knockout device having a lever mechanism provided on the lower surface of the bolster, and is knocked out from the lower mold after forming the workpiece. .

Further, by executing the knockout timing collectively at the top dead center, it is possible to easily solve the problem of interference between the molding operation and the knockout operation, as well as unification of components.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 shows an entire longitudinal sectional structure of a press machine according to an embodiment of the present invention. In FIG. 1, a press machine 100 includes a rotation power generation device 9, a crown 6 having the rotation power generation device 9 fixed at an upper portion by a fixing means (not shown), and a bolster 2 fixedly mounted on the gantry 1.
And four tie rods 3 vertically implanted at four corners of the bolster 2, a slider guide 4 provided between the crown 6 and the bolster 2 in parallel with the bolster 2 and fixed to the tie rod 3, and a crown 6; And an upright 5 interposed between the slider guide 4.

The tie rod 3 has a substantially circular cross-sectional shape, and has a screw portion 3a provided at the upper end, a small diameter portion 3b continuing below the screw portion 3a, and a large diameter continuing below the small diameter portion 3b. A portion 3c. Here, D in FIG.
As shown in FIG. 5, the upright 5 has a substantially cylindrical shape whose inner periphery fits the outer periphery of the small-diameter portion 3b, and the crown 6 has a through hole 6a penetrated by the small-diameter portion 3b.
The slider guide 4 has a through hole 4a penetrating through the small diameter portion 3b. That is, the small diameter portion 3b is penetrated in the order of the slider guide 4, the upright 5, and the crown 6, and the tie rod 3
The bolster 2, the tie rod 3, the slider guide 4, the upright 5, and the crown 6 are firmly and accurately and stably fixed by tightening the nut 7 screwed into the screw portion 3a.

The torque transmitted to the drive shaft 11 via the shaft coupling 10 is transmitted via a key 13 to a rotating swash plate 12 supported on the drive shaft 11 in a rotatable state. Note that the rotary swash plate 12 has a function of replacing the rotational force with a vertical acting force (hereinafter, this acting force is appropriately referred to as a forming force). Therefore,
The rotating swash plate 12 and the crown 6 adopt an adjacent structure so that the reaction force of the molding force generated by the rotation of the rotating swash plate 12 can be directly received by the crown 6.

On the other hand, on the lower surface of the rotary swash plate 12, the rotary swash plate 12 is used to smoothly and efficiently transmit the forming force generated by the rotation of the rotary swash plate 12 to the slider 15.
A swing plate 14 is provided which can swing vertically in synchronization with the rotation of. A hemispherical body 14a protruding downward is integrally formed at the center of the swinging plate 14, and the hemispherical body 14a is
“a” rotatably faces the slider guide 4 to try spherical contact. In addition, a through hole 14b penetrating vertically is provided at the center of the swing plate 14, and the spherical body portion 11a provided on the drive shaft 11 is supported by the through hole 14b, and the swing plate 14 extends in a direction perpendicular to the axis. Blocking movement. Further, the swing plate 14 has a spherical body shape at the end, and a connecting rod 16 for engaging with the slider 15 and a connecting rod 53 for engaging with the knockout slider 51 are respectively provided on the support plate 1.
It is rotatably held at 7, 54.

The other end of the connecting rod 16 is rotatably held by a slider 15 slidably supported by the slider guide 4, and is engaged by a cap 18. On the other hand, the other end of the connecting rod 53 is rotatably held by a knockout slider 51 which is slidably supported by the slider guide 4 and the bolster 2.
2 are engaged.

A plurality of cylindrical holes 4b are formed at equal intervals on the concentric circle of the drive shaft 11 of the slider guide 4. In the cylindrical hole 4b, there is buried a support 20 in which a spherical sleeve 19 having a spherical body is supported so as to follow the movement of the swing plate 14, and the swing plate is rotated by the rotational friction force with the rotary swash plate 12. The structure prevents rotation of the rotary swash plate 12 with the rotation of the rotary swash plate 12.

Next, referring to the knockout device 21, its operation is performed by the slider 15 which directly performs the molding operation.
Is arranged so as to be at the bottom dead center position at the time of the top dead center, and always operates in a fixed relationship with the rotary swash plate 12 and the slider 15 to knock out the press-formed product from the mold.

On the other hand, the structure and function of the knockout device 21 is such that a bracket 58 rotatably supporting a lever support bearing portion 59a of a lever 59 is firmly fixed to the lower surface of the bolster 2, and one end 59b of the lever 59 is connected to the lower surface of the bolster 2. The other end 59c is slidably engaged with the lower ball head 51a of the knockout slider 51, and the lower end ball head 31 of the push-up pin 57 incorporated in the bolster 2 is slidable with the lever 59c. Is engaged.

Next, the operation of the knockout device 21 will be described. By the rotation of the rotary swash plate 12, the swing plate 14 starts a vertical swing motion. With this swinging movement, the slider 15 and the knockout slider 51 that engage with the swinging plate 14 via the connecting rods 16 and 53 perform up and down operations. That is, the molding operation is performed by the upper mold 42 attached to the lower end of the slider 15 and the lower mold 45 attached to the upper surface of the bolster 2 by the above-described vertical operation. On the other hand, knockout slider 51
As described above, 180 represents a rising operation for the descending operation of the slider 15 and a descending operation for the ascending operation.
Perform up and down movements with an angular phase difference of degrees. That is, when the slider 15 completes the molding operation at the bottom dead center and operates toward the top dead center, the knockout slider 51 descends and pushes down the lever 59b. By pushing down the lever 59b, the lever 59c is pushed up and rotated about the lever support bearing 59a as a fulcrum. The push-up pin 57 engaged with the lever 59c by the push-up rotation operation of the lever 59c.
Rises, and the knockout pin 43 that engages with the push-up pin 57 rises to knock out the press-formed product from the lower mold 45.

As described above, the press machine having the above configuration can be set without being restricted by the knockout stroke in the time difference knockout as shown in the prior art.
Another object of the present invention is to provide a press machine characterized by being realized by a self-contained function without newly providing a power for knockout or obtaining from another place.

[0019]

According to the present invention, the knockout slider is engaged with the slider performing the forming operation on the swinging plate which swings by the rotation of the rotary swash plate with an angular phase difference of 180 degrees. Self-contained knock-out system with no knock-out timing and knock-out stroke. It is to provide a press machine having a realized knockout device.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing the entire structure of a press machine according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a sectional view taken along line BB in FIG.

FIG. 4 is a sectional view taken along line CC in FIG.

FIG. 5 is a sectional view taken along line DD in FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Stand, 2 ... Bolster, 2a, 4a, 4c, 6a, 1
4b: through hole, 3: tie rod, 3a: screw part, 3b
... Small diameter part, 3c ... Large diameter part, 4 ... Slider guide,
4b: cylindrical hole, 5: upright, 6: crown, 7 ...
Nut, 8 ... Spacer, 9 ... Rotating power generator, 10 ...
Shaft coupling, 11: drive shaft, 11a: spherical body, 12: rotary swash plate, 13: key, 14: rocking plate, 14a: hemispherical body,
15 ... Slider, 16,53 ... Connecting rod, 17,5
4 Support plate, 18 Cap, 19 Spherical sleeve, 20 Support, 21 Knockout device, 29
... Sliding liner, 31 ... Head head, 42 ... Upper mold, 43 ...
Knockout pin, 44 ... insert plate, 45 ...
Lower mold, 51: knockout slider, 51a: lower ball head, 51b: upper fitting part, 52: holding plate, 5
5, 56, 60: bearing, 57: push-up pin, 58: bracket, 59, 59b, 59c: lever, 59a: lever support bearing, 59d: shaft, 100: press machine.

Claims (3)

[Claims] An end of a connecting rod having a spherical body portion is rotatably engaged with a knockout slider on the other end of a connecting rod having a spherical body portion on a swinging plate which swings by rotation of a rotary swash plate. A press machine characterized in that power is transmitted to a knockout device provided on a lower surface portion of a bolster through the bolster to perform knockout. 2. A knock-out slider according to claim 1, wherein a through hole is provided in the slider guide and the bolster, and a bearing is mounted on the inner surface of the through hole.
Press machine characterized by easy smooth operation. 3. The knockout device according to claim 1, wherein a lever mechanism is employed in the structure of the knockout device provided on the lower surface of the bolster, and one lever engaged with the knockout slider and a plurality of levers engaged with the knockout push-up pin are provided. A press machine characterized in that multiple knockout push-up pins can be operated simultaneously by operating a knockout slider.