JPH06598U - Press machine - Google Patents

Abstract

(57) [Summary] [Purpose] To achieve downsizing and cost reduction. [Structure] A slide position adjusting device (4) comprising a slide position adjusting mechanism mounted on a slide (4) side and a slide adjusting driving means (51) mounted on a crown (1) side.
0) and a counterbalance device (30) for balancing the weight, the cylinder (31) of the counterbalance device (30) is fixed to the slide (4) and the cylinder (31) is fixed. A through hole (33H) is provided in a piston rod (33) which is slidably mounted in the piston and is integrated with a piston (32) which forms a cylinder chamber (34), and slide adjusting drive means (51) is provided.
The power transmission shaft (52) rotatably through the through hole (33H), is connected to the piston rod (33) so as to be relatively immovable in the axial direction, and is relatively moved to the slide position adjusting mechanism (41) in the axial direction. It is a configuration that can be connected.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a press machine equipped with a slide position adjusting device and a counter balance device.

[0002]

[Prior art]

 Many press machines are equipped with a slide position adjusting device used for die height adjustment and the like, and a counter balance device for balancing the weight of the slide that moves up and down the stroke.

The slide position adjusting device is composed of a slide position adjusting mechanism for vertically moving the slide relative to the plunger or the connecting rod, and a slide adjusting drive means for applying adjustment power to the slide position adjusting mechanism. However, it is common. Therefore, the slide position adjusting mechanism is mounted on the slide side, but it is desirable that the slide adjusting drive means is mounted on the crown side in order to protect the motor and the like from an impact due to the press work.

Here, the slide adjusting drive means mounted on the crown side is formed to include a motor, a gear mechanism and the like, as disclosed in Japanese Utility Model Laid-Open No. 64-49400, and is arranged between the plungers, that is, in the press center. Set up. The slide adjusting drive means and the slide side slide position adjusting mechanism are connected by a power transmission shaft (which forms a part of the slide adjusting drive means).

On the other hand, the counter balance device is composed of a cylinder device (30P). Generally, as shown in FIG. 2, a cylinder 31P fixed to the crown 1, a piston 32P slidably mounted in the cylinder 31P, and a piston rod 33P connecting the slide 4 integrally with the piston 32P. And a cylinder device 30P including. Therefore, if a predetermined air pressure is applied from the air supply means 60P into the cylinder chamber 34, a lifting force (balance force) F corresponding to the weight of the slide 4 including the weight of the upper die can be generated. The air supply means 60P is composed of a compressed air source 63P, a pressure adjusting valve 62P and a buffer tank 61P as shown in FIG. 64 P is a pressure gauge.

[0006]

[Problems to be solved by the device]

 By the way, both the slide position adjusting device and the counter balance device 30P are installed in the press center according to their respective purposes and functions. Therefore, in the above-mentioned conventional structure, the layout around the press center becomes complicated, and a large amount of labor and time are required for mounting and adjusting. Further, it is necessary to modify one of the devices, or it is necessary to arrange two counterbalance devices 30P on both sides of the power transmission shaft so as to increase the size and cost of the press machine. Invited.

An object of the present invention is to provide a press machine having a simple structure, a small size, and a low cost.

[0008]

[Means for Solving the Problems]

 According to the present invention, when the slide adjusting drive means constituting the slide position adjusting device is mounted on the crown side, a power transmission shaft for connecting to the slide position adjusting mechanism mounted on the slide side is arranged at the press center. Paying attention to what must be done, a cylinder forming a counterbalance device is provided on the slide side, and the balancing force (F) is generated on the basis of the crown by passing through the piston rod and the power transmission shaft, and The power transmission shaft is rotatably pierced in the piston rod and integrally configured so as to exhibit the original power transmission function, thereby achieving the above object.

That is, the press machine according to the present invention comprises a slide position adjusting device including a slide position adjusting mechanism mounted on the slide side and a slide adjusting driving means mounted on the crown side, and a slide including an upper die weight. In a press machine equipped with a counter balance device for balancing the weight with a weight, a cylinder constituting a part of the counter balance device is fixed to the slide and slidably mounted in the cylinder. In addition, a through hole is provided in the piston rod that is integral with the piston that forms the cylinder chamber, and the power transmission shaft that forms a part of the slide adjustment drive means is rotatably passed through the through hole and is axially aligned with the piston rod. Connected relatively immovably and relatively slidably in the axial direction to the slide position adjusting mechanism. Is characterized by.

[0010]

[Action]

 In the present invention having the above-described structure, when a predetermined air pressure is supplied to the cylinder chamber composed of the cylinder and the piston, the piston rod is supported by the crown through the power transmission shaft and the cylinder is fixed to the slide. You can add balance. Since the power transmission shaft is rotatably pierced in the piston rod, if the motor of the slide adjustment drive means provided on the crown side is rotated, the power is transmitted to the slide position adjustment mechanism provided on the slide side. Can communicate. Therefore, the functions of the counter balance device and the slide position adjusting device can be independently exerted while using the power transmission shaft in common.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to FIG.

In FIG. 1, a counter balance device 30 includes a cylinder 31 fixed to a slide 4 with bolts 35, and a piston 32 slidably fitted in the cylinder 31 and forming a cylinder chamber 34 together with the cylinder 31. And the piston 32 and an integral piston rod 33.

That is, the counter balance device 30 in this invention is composed of a cylinder device (31, 32, 33, 34), and is a fixed side with the piston rod 33 (power transmission shaft 52) supported on the crown 1 side. Moreover, the cylinder 31 is formed on the movable side. The structure is just opposite to that of the conventional example shown in FIG. Therefore, if a predetermined air pressure is supplied into the cylinder chamber 34, the balance force F based on the crown 1 (power transmission shaft 52) can be applied to the slide 4 via the cylinder 31.

Here, the piston rod 33 is provided with a through hole 33H in the axial direction. The power transmission shaft 52 can be rotatably penetrated through the through hole 33H. Further, the piston rod 33 (piston 32) and the power transmission shaft 52 cannot move relative to each other in the axial direction. Therefore, the thrust bearing 36 is interposed between the power transmission shaft 52 and the piston 32.

Specifically, in the power transmission shaft 52, a flange portion 52F provided on an upper end side thereof is supported by a bracket 1B integral with the crown 1 via a thrust bearing 53, and a flange portion 52F is provided on a lower end side thereof. A spline shaft 52S having 52SF is screwed. The power transmission shaft 52 is positioned between the plungers 2 and 2, that is, at the press center Z.

On the other hand, the slide position adjusting mechanism 41 forming a part of the slide position adjusting device 40 includes a ball guide 46 (ball 47), a drive gear 42G integrated with the driving body 42, an intermediate gear 43, and an adjusting gear. 44, and receives rotational power from the spline shaft 52S and is engaged and coupled to the spline shaft 52S so as to be relatively movable in the axial direction. The screw portion 44SC provided inside the adjusting gear 44 is screwed with the screw portion 3SC of the adjusting screw shaft 3 attached to the plunger 2.

The slide adjustment drive means 51 includes a motor 56, a drive bevel gear 55, and a driven bevel gear 54, and applies a rotational power for slide position adjustment to the slide position adjustment mechanism 41 via the power transmission shaft 52. Give.

In the embodiment having such a configuration, when a predetermined air pressure is applied to the cylinder chamber 34 forming the counter balance device 30, the piston 32 is substantially on the fixed side, that is, the piston 32 is the thrust bearing 36, the flange. Since it is supported by the crown 1 via the portion 52SF, the power transmission shaft 52, the flange portion 52F, the thrust bearing 53, and the bracket 1B, a lifting force can be applied to the cylinder 31. Therefore, the upward balance force F can be applied to the slide 4.

Here, the slide adjusting drive means 51 (motor 56) is operated to rotate the power transmission shaft 52 thereof. Then, the spline shaft 52S is synchronously rotated, and the rotational power thereof is transmitted to the drive gear 42 G via the ball 47 (ball guide 46) and the rotating body 42. Therefore, since the intermediate gear 43 rotates the adjusting gear 44, the entire slide including the slide position adjusting mechanism 41 is based on the threaded relationship between the screw portion 44SC of the adjusting gear 44 and the screw portion 3SC of the adjusting screw shaft 3. It is vertically displaced by a certain amount with respect to the plunger 2. At this time, since the ball guide 46 is connected to the power transmission shaft 52 via the spline shaft 52S, the power transmission shaft 52 and the slide 4 (slide position adjusting mechanism 41) can relatively move in the axial direction.

Therefore, according to this embodiment, the cylinder 31 forming a part of the counter balance device 30 is fixed to the slide side, and is slidably mounted in the cylinder 31 and the cylinder chamber together with the cylinder 31. The piston rod 33 that is integral with the piston 32 that forms the reference numeral 34 is provided with a through hole 33H, and the power transmission shaft 52 that forms a part of the slide adjustment drive means 51 is rotatably passed through the through hole 33H. 33 and the slide position adjusting mechanism 41 so as to be relatively immovable in the axial direction and to be relatively movable in the axial direction, the counter balance device 30 and the slide position adjusting devices 40 (41, 51) are connected to each other. Each function can be independently used while using the power transmission shaft 52 in common, and the structure is simple. A compact and low cost press machine can be established.

Further, a cylinder device (31, 32, 33) forming the counter balance device 30 is attached to the slide 4, and a through hole 33H through which the power transmission shaft 52 is rotatably penetrated is formed in the piston rod 33 thereof. Since they are provided, both devices 30 and 40 can be coaxially mounted on the press center Z, and assembly and adjustment can be dramatically and easily performed, and the degree of freedom in layout can be greatly expanded.

[0022]

[Effect of device]

 According to the present invention, a cylinder forming a part of a counterbalance device is fixed to a slide, and a through hole is formed in a piston rod which is slidably mounted in the cylinder and which forms a cylinder chamber. A power transmission shaft forming a part of the slide adjusting drive means is rotatably passed through the through hole and is connected to the piston rod so as to be relatively immovable in the axial direction and relatively movable in the axial direction to the slide position adjusting mechanism. Since they are connected as much as possible, the functions of the counter balance device and the slide position adjusting device can be independently exerted while using the power transmission shaft in common, and the structure is simple, compact and low in cost. A press machine can be established.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a diagram for explaining a conventional counter balance device.

[Explanation of symbols]

 1 Crown 2 Plunger 3 Adjusting Screw Shaft 3SC Screw Part 4 Slide 30 Counterbalance Device 31 Cylinder 32 Piston 33 Piston Rod 33H Through Hole 34 Cylinder Chamber 35 Bolt 36 Thrust Bearing 40 Sliding Position Adjusting Device 42 Sliding Position Adjusting Mechanism 42 Driver 42G Drive Gear 43 Intermediate gear 44 Adjusting gear 44SC Screw portion 45 Bearing 46 Ball guide 47 Ball 51 Slide adjusting drive means 52 Power transmission shaft 52F Flange portion 52S Spline shaft 52SF Flange portion 53 Thrust bearing 54 Driven bevel gear 55 Drive bevel gear 56 Motor

Claims (1)

[Scope of utility model registration request] 1. A weight balance between a slide position adjusting device including a slide position adjusting mechanism mounted on a slide side and a slide adjusting driving means mounted on a crown side, and a slide weight including an upper die weight. In a press machine provided with a counterbalance device, a cylinder forming a part of the counterbalance device is fixed to the slide, and is integrated with a piston slidably mounted in the cylinder and forming a cylinder chamber. A through hole is provided in the piston rod, a power transmission shaft forming a part of the slide adjusting drive means is rotatably passed through the through hole, and is connected to the piston rod so as to be relatively immovable in the axial direction and the slide position is adjusted. A press machine characterized in that it is connected to the mechanism so as to be movable in the axial direction.