JP3687951B2 - Screw type mechanical press - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention, by attaching the mold relates to threaded mechanical press for performing press working, in particular cold extrusion parts, stamped parts, of a preferred threaded mechanical press to shape a drawing parts and the like with high accuracy.
[0002]
[Prior art]
Screw type press machine using a flywheel, the magnitude of the applied as kinetic energy in the flywheel is always controlled to be constant friction plate, so obtain row stable pressing, eliminating variations in product quality it is intended that may have been known by Japanese Patent 10-328898 discloses.
[0003]
Japanese Laid-Open Patent Publication No. 10-272598 also discloses a screw-type mechanical press that transmits the rotational force of an electric motor to a screw shaft through a timing pulley and a timing belt and reciprocates a slide by the rotation of the screw shaft.
[0004]
[Problems to be solved by the invention]
However, in the former, the acceleration is calculated from the speed of the ram, and when the acceleration is large, the disconnection time of the clutch device that connects and disconnects the power transmission between the drive device and the flywheel is advanced, and conversely when the acceleration is small, the clutch is Control device so that the flywheel always has a constant kinetic energy when the clutch is disconnected by delaying the device disconnection time and eliminating the variation in kinetic energy of the flywheel after the clutch device is disconnected due to variations in the rotational speed of the flywheel. It is a thing.
[0005]
The above equipment can be said to be suitable as a hot forging press with a fast ram (slide) lowering speed, but a cold forging press machined in a normal temperature environment has a high accuracy because the lowering speed is fast. Difficult to get. Further, this lowering speed makes it difficult to control the pressure or position of the bottom dead center. Furthermore a complicated configuration due to the need for a flywheel or a clutch device, which may also increase the loss of mechanical noise and energy.
[0006]
On the other hand, the latter is also effective as a press with a relatively small capacity because the pressurizing capacity of the press can not be increased because the screw shaft is rotated by an electric motor and a timing pulley. It is not possible to cover even things. Moreover, since there is no energy storage, there is a disadvantage that a long object cannot be formed. An object of the present invention is to provide a screw-type mechanical press suitable for cold forging with a simple configuration that can control the rotation amount of a screw shaft without providing a special control mechanism.
[0007]
[Means for Solving the Problems]
The present invention includes a slanted-axis hydraulic motor (4) on an upper part of a frame (2) for housing a press machine main body, and an output shaft (5) of the slanted-axis hydraulic motor (4) and the press machine main body. in the press apparatus and the screw shaft (6) is attached coaxially, the bent axis type hydraulic motor (4) is tiltably has disposed the housings (11) relative to said output shaft (5) The rotation center of the housing (11) is a rotation support shaft (18) supported by the frame (2), and a passage (21) for supplying and discharging hydraulic oil into the rotation support shaft (18). There is a pipe (20) from the oil supply direction switching valve (19) at one end of the passage (21), and a communication passage (22) formed at the other end on the inner surface of the housing (11) and the side cover (12). It is accomplished by a threaded mechanical press in communication with the That.
[0008]
Preferably the present invention, bent axis type oil pressure motor holds the cylinder block, and a housing disposed for tilting relative to the output shaft, the rotation center of the housing through a pivot shaft one This is achieved by being arranged so as to be swingable in the direction.
[0009]
In the present invention, preferably, the rotation support shaft serves as both a hydraulic supply pipe and a hydraulic discharge pipe and is rotatably supported by a box at the upper part of the frame. Preferably the present invention, the side cover that form an outer frame integral with the housing and the housing, are more accomplished that forms a hydraulic passage that bore in communication with the cylinder block.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
【Example】
Embodiments of the present invention will be described below with reference to a screw-type mechanical press shown in FIGS. 1 to 3, the press machine 1 is located in the frame 2, the inclined shaft type oil pressure motor 4 to the box 3 and the frame 2 of the upper disposed fixed, coupling member such as a key to the output shaft 5 in mesh binding coaxially a screw shaft 6 forming the male thread through. The screw shaft 6 extends almost to the middle of the press machine body, and a spherical nut 7 whose lower end is hemispherical is screwed. The spherical nut is coupled and fixed to the upper slide 8 via a key or the like. .
[0011]
The lower slide 9 that forms a pair with the upper slide 8 has a play hole 91 for receiving the screw shaft 6 at the center, and the upper end surface is brought into spherical contact with the nut 7 and is suspended from the upper slide 8 by a mounting bolt 10. Is fixed. The slides 8 and 9 are slidably held on the frame 2 via a slide guide.
Next, the relationship between the oblique axis hydraulic motor 4 and the screw shaft 6 which are the gist of the present invention will be described in detail. The slant shaft type hydraulic motor 4 forms an outer frame by a cylindrical housing 11 having a front end having an opening hole 11a and a peripheral inner peripheral surface thereof being a spherical surface, and a side cover 12 that closes the upper opening end of the housing 11. In addition, a slant shaft type hydraulic motor 4 is built in.
[0012]
An output shaft 5 connected to the screw shaft 6 and serving as an output shaft of the oblique shaft type hydraulic motor 4 is formed in a substantially T shape, and one end thereof extends in a direction penetrating the crown 3 downward, and the housing 11 is rotatably supported via a bearing on a shaft holding cylinder 13 which is in spherical contact with the inner circumferential surface of the tip. The other end surface of the output shaft 5 is disposed to face a cylinder block 14 that is rotatably disposed in the housing 11, and forms a piston holding portion.
[0013]
A plurality of drive pins 15 for transmitting rotational torque are provided on a concentric circle near the center between the output shaft 5 and the cylinder block 14, and a spherical head is provided on the same circumference around the output pin. A piston 17 is provided which is rotatably held by a piston holding portion of the shaft 5 and whose other end is slidably inserted into the bore 16 of the cylinder block 14.
[0014]
On the other hand the line connecting the spherical head center of the piston 17, rotating shaft 18 around axis on該線is not fixedly provided on the box body 3 and the frame 2, the housing 11 to the rotating shaft Is rotatably and airtightly held. This center of rotation shaft 18 is supply and discharge passage 21 is provided which is connected to the pipe 20 from the oil supply direction switching valve 19, communication passage 23 formed in the communication passage 22 and the side cover 12 formed in the housing 11 Is communicated with the bore 16 via
[0015]
Further, as shown in FIG. 2, the housing 11 has a tip opening hole 11a formed as a long hole in a direction perpendicular to the rotation support shaft 18 so that the rotation support shaft 18 can be tilted in one direction. As shown in FIGS. 2 and 3, the housing 11 is pulled by a pair of left and right air cylinders 24 provided at the upper end of the outer periphery of the housing 11.
[0016]
Although a detailed configuration is omitted, a seal member made of an O-ring or the like is disposed between the parts provided with the communication path to prevent leakage of hydraulic oil. Further, an oil supply passage is formed in the shaft holding cylinder 13 so as to supply lubricating oil to the bearing portion and the surrounding sliding surface.
[0017]
In the above configuration, as shown in FIG. 1 (the top dead center of the slide), in a state where the tilt angle of the cylinder block 14 is zero and the relationship with the screw shaft 6 is in a straight line, the piston 17 can be operated even if hydraulic pressure is applied to the bore. It does not operate and the output shaft 5 does not rotate. On the other hand, the housing 11 is pulled by an air cylinder 24 whose operating range can be controlled by air or the like, the housing 11 is tilted in the forward direction and the tilt angle of the cylinder block 14 is taken, the output shaft 5 is rotated, and the slide 8 is pressed. Lower to position and prepare for press work.
[0018]
Next, the tilt angle is adjusted to a position where work can be performed with a predetermined press pressure (press pressure adjustment), and product processing is performed. After processing the product, once the tilt angle is made zero, the oil supply direction is switched by the oil supply direction switching valve 19. Then, the housing 11 is tilted again and the cylinder block 14 is reversed to return the slide 8 from the bottom dead center position to the original top dead center position for the next operation. The return operation of the slide 8 is naturally adjusted by the setting of the tilt angle, and the speed at which the slide 8 is quickly returned to the top dead center is selected.
[0019]
Mechanical press having such a configuration due to the rotational driving source of the screw shaft and bent axis type hydraulic motor, magnetic noise of the motor in addition to mechanical noise such as gear or the clutch is eliminated at or very static not occur It becomes a resource - saving machine press. In addition, since the slide moving speed control, pressure control, and bottom dead center position control can be freely controlled, a mechanical press suitable for cold extrusion molding is obtained.
[0020]
The present invention provides a threaded mechanical press comprising obtaining a pressing pressure by reciprocating the screwed slide on the screw shaft which is driven to rotate in the axial direction, Oblique type oil pressure motor output shaft to said screw shaft the by the Turkey to provide rotational driving force to a coaxial coupling, the rotation amount of the screw shaft can be easily set, the screw-type mechanical press that is suitable for cold forging is provided with a simple configuration.
[0021]
Bent axis type oil pressure motor holds the cylinder block, and a housing disposed for tilting relative to the output shaft, the rotation center of the housing swingably in one direction through a pivot shaft Since it is arranged, a screw type mechanical press capable of adjusting the amount of rotation of the screw shaft with a simple operation is provided.
[0022]
The rotating support shaft also serves as a hydraulic oil supply pipe and a discharge pipe, and is supported rotatably on the box and the frame , thereby providing a screw type mechanical press that is compact and easy to handle. By providing a hydraulic passage that communicates with the cylinder in the housing and a side cover that forms an outer frame integrally with the housing, troublesome piping can be simplified, and a maintenance-free screw-type mechanical press is provided without interfering with other devices. The
[0023]
【The invention's effect】
According to the present invention, by supplying a rotational driving force to the coaxial coupling the output shaft of Oblique type oil pressure motor to the screw shaft, screw machine press simple configuration can be easily set the rotation amount of the screw shaft Provided by.
[Brief description of the drawings]
FIG. 1 is a longitudinal front view of an essential part of a screw press machine according to an embodiment of the present invention. FIG. 2 is a longitudinal side view of an essential part of FIG. 1. FIG. 3 is a top view of FIG.
2 ... Frame 4 ... Oblique shaft type hydraulic motor 6 ... Screw shaft 7 ... Spherical nut 8 ... Upper slide 9 ... Lower slide 10 ... Mounting bolt 11 ... Housing 11a ... Open hole 12 ... Side cover 13 ... Shaft holding cylinder 14Cylinder block 18 ... Rotating spindle 20 ... Piping 21 ... Supply / discharge passage 22,23 ... Communication passage 24. ..Air cylinder

Claims (2)

A slant shaft type hydraulic motor (4) is provided on the upper part of the frame (2) for housing the press machine main body, and the output shaft (5) of the slant shaft type hydraulic motor (4) and the screw shaft (6) of the press machine main body. The slanted shaft hydraulic motor (4) includes a housing (11) disposed to be tiltable with respect to the output shaft (5). ) Is a rotary mechanical shaft (18) supported by the frame (2) . There is a passage (21) for supplying or discharging hydraulic oil inside the rotary spindle (18), one end of the passage (21) is connected to the pipe (20) from the oil supply direction switching valve (19), and the other end is 2. The screw-type mechanical press according to claim 1, wherein the mechanical press is in communication with a communication passage (22) formed in the inner surface of the housing (11) and the side cover (12) .

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