JPH10175097A - Slide device of mechanical press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the structure, to reduce the manufacturing time, and to reduce the manufacturing cost by providing a slide device of a machine press to vertically move a slide in the deformed sinusoidal process by engaging the minor radius of a drive gear with the major radius of a main gear. SOLUTION: When a drive gear 7 is turned by receiving the power from a main motor 2 through a clutch brake 5 and a flywheel 6, a crank shaft 12 supported by bearings 13, 13 provided on a frame 1A of a machine press 1 through a main gear 11 engaged with the drive gear 7 is turned. A slide 14 is vertically moved while performing the dynamic balance of a dynamic balancing device 16 through connecting rods 15, 15 to be connected to eccentric parts 12A, 12A of the crank shaft 12, and the pressing is repeated in the process close to the deformed sinusoidal process by a die provided between the slide 14 and a bolster 19 on a bed 18.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slide driving device for a mechanical press which moves a slide up and down in a deformed sine stroke by rotating a non-deformed gear.

[0002]

2. Description of the Related Art A slide drive of a mechanical press according to the prior art includes a drive gear provided on a drive shaft by the power of a drive source, and an intermediate shaft having an intermediate gear which meshes directly with the drive gear or with the drive gear. Via a main gear that meshes via a pinion provided on the shaft, it is transmitted to a crankshaft or eccentric shaft instructed to be rotatable on a bearing member provided on the frame, and is rotatable on an eccentric portion of the crankshaft or eccentric shaft. There is a slide drive device that moves a slide up and down at a constant speed (sine) stroke shown in FIG. 3 via a connecting rod connected to the slide rod.

Further, there is a slide driving device for moving a slide up and down at an unequal speed (link) stroke shown in FIG. 3 by a slider mechanism such as Japanese Utility Model 1-40634 or an eccentric link mechanism such as Japanese Patent Publication No. 3-73399. Further, there is a slide drive device of a knuckle mechanism that moves a slide up and down in an unequal speed (knuckle) stroke shown in FIG. 3 from a crankshaft through a set of powerful toggle mechanisms.

[0004]

In the above-mentioned prior art, both the slider mechanism in the unequal speed stroke and the slide drive device in any of the eccentric link mechanism and the knuckle mechanism are required.
The structure is complicated as compared with the slide drive device having a constant speed stroke, and therefore, a lot of time and money are required for manufacturing.

Further, in a slide drive device having a constant speed (sine) stroke, it is necessary to reduce the speed near the bottom dead center of the slide stroke and to make the stop time longer for press working, so that the top dead center and the bottom dead center of the slide stroke are required. And the acceleration is
In particular, a break drive is added at the bottom dead center side, and a slide drive device with a non-constant speed stroke of the slide is required.

However, in the above-described slide drive device of the link (slider mechanism and eccentric link mechanism) and the knuckle mechanism at an irregular speed stroke, the speed and acceleration on the top dead center side are large irrespective of the press work area. It is difficult to increase the speed. From these facts, as for the slide stroke of the slide drive device, the speed near the middle point of the slide stroke is large due to press working, but the speed near the top dead center and bottom dead center is correspondingly small, and the top dead center and bottom dead center are small. A modified sine stroke in which the acceleration at zero becomes zero is desirable.

An object of the present invention is to solve the above-mentioned problems and to provide a slide drive device of a mechanical press that moves a slide up and down in a high-speed deformed sine stroke with a simple structure similar to a slide drive device of a constant-speed stroke. With the goal.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a method of transmitting power of a driving source to a bearing member of a frame through a driving gear provided on a driving shaft and a main gear meshing with the driving gear. It is rotatably supported on the shaft and transmitted to a crankshaft or an eccentric shaft provided with a main gear on the shaft, and slides via a connecting rod swingably connected to the eccentric portion of the crankshaft or the eccentric shaft. In a slide drive device of a mechanical press that moves up and down, the drive gear and the main gear are non-deformed gears having the same number of teeth, and the short diameter of the drive gear meshes with the long diameter of the main gear to move the slide up and down in a deformed sine stroke. Of the slide drive device of the mechanical press.

[0009]

FIG. 1, FIG. 2, and FIG. 3 show an embodiment of the present invention. As shown in FIGS. 1 and 2, the power of the main motor 2 provided on the frame 1A of the mechanical press 1 is as follows.
The power is transmitted to a flywheel 6 provided with a clutch / brake 5 via a pulley 3 and a belt 4 provided on the main motor 2.

The flywheel 6 is provided on a drive shaft 8 having a non-deformed, in this embodiment, elliptical drive gear 7,
The drive shaft 8 is rotatably supported by bearings 9, 9 provided on the frame 1A of the mechanical press 1. The drive gear 7 meshes with the main gear 11 having the same shape and the same number of teeth as the drive gear 7 by shifting the phase by 90 degrees with the short diameter of the drive gear 7 and the long diameter of the main gear 11.

The main gear 11 is provided at an end of a crankshaft 12.
Are rotatably supported by bearings 13, 13 provided in the housing. Eccentric portions 12A, 12A are provided on left and right portions of the crankshaft 12.
Connecting rod 1 connected to slide 14
5, 15 are swingably connected. Also, the crankshaft 12
Eccentric parts 12A, 12A and 180
A connecting rod 17 having an eccentric portion 12B shifted in phase by a degree and connected to a dynamic balancing device 16 that moves up and down relative to the up and down movement of the slide 14 is swingably connected.

The power from the main motor 2 is supplied to the clutch
When the drive gear 7 rotates by receiving the brake via the brake 5 and the flywheel 6, the main gear 11 meshing with the drive gear 7
Bearing 1 provided on frame 1A of mechanical press 1 through
The crankshaft 12 supported by 3 and 13 rotates. The slide 14 moves up and down while maintaining a dynamic equilibrium with the dynamic balancing device 16 via the connecting rods 15 and 15 connected to the eccentric portions 12A and 12A of the crankshaft 12, and the slide 14 and the bolster on the bed 18 are moved. The press working is repeated in a stroke close to the modified sine stroke as shown in FIG.

In this embodiment, the shapes of the drive gear 7 and the main gear 11 are elliptical. However, a deformed sine stroke is formed by using a non-deformed gear of another shape according to the pressed product. Is also good.

[0014]

As is apparent from the above description, according to the present invention, the structure is simple, the production time can be reduced and the production cost can be reduced. A slide drive device of a mechanical press for moving a slide up and down can be provided.

[Brief description of the drawings]

FIG. 1 is a simplified front view of a slide drive device of a mechanical press according to an embodiment of the present invention.

FIG. 2 is also a simplified explanatory diagram of gear engagement of a slide drive device.

FIG. 3 is also a simplified explanatory diagram of a slide process.

[Explanation of symbols]

1 is a mechanical press, 1A is a frame, 2 is a main motor,
3 is a pulley, 4 is a belt, 5 is a clutch / brake,
6 is a flywheel, 7 is a drive gear, 8 is a drive shaft, 9,
13 is a bearing, 11 is a main gear, 12 is a crankshaft,
12A and 12B are eccentric parts, 14 is a slide, 15, 17
Is a connecting rod, 16 is a dynamic equilibrium device, 18 is a bed, and 19 is a bolster.

Claims (1)

[Claims] 1. A crankshaft in which power of a drive source is rotatably instructed to a bearing member of a frame via a drive gear provided on a drive shaft and a main gear meshing with the drive gear, and a main gear is provided on the shaft. Alternatively, in a slide drive device of a mechanical press, which transmits a signal to an eccentric shaft and moves the slide up and down via a connecting rod slidably connected to an eccentric portion of the crankshaft or the eccentric shaft, The main gear is an undeformed gear having the same number of teeth. (B) The minor axis of the drive gear meshes with the major axis of the main gear, and the slide is moved up and down in a modified sine stroke. A slide drive device for a mechanical press characterized by the above.