JPS59156531A - Driving device for forging machine - Google Patents

Abstract

PURPOSE:To reduce the capacity of a main motor and the loss of a hydraulic circuit by providing a piston pump as a driving device and enabling hydrostatic driving of a hydraulic press by an external device. CONSTITUTION:A driving device provided on the outside of a forging machine is formed of a piston pump. The piston 11 of the piston pump is driven by a crank shaft 5. The shaft 5 is connected at one end to a flywheel 3 by a clutch 2 and is provided with a brake 29 at the other end. A small piston 27 is driven by a cam 16 provided to said shaft 5. The slide knockout and bottom knockout of the hydraulic press body are then hydraulically actuated in synchronization with the movement of a press slide.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drive device for a forging machine. The objectives are 1) to provide an energy-saving 7 press, 2) to provide a press that can perform a large number of operations per minute, and 3) to provide a press that can reliably synchronize the slide knockout and bottom knockout presses. to provide
4) To provide a press with easy slide adjustment; 5)
To provide a press that is sure to prevent overload, 6) To improve workability around the press body by installing the drive device away from the press body, and to improve maintainability and safety. 7) To provide a press that allows quick approach, slow forging, and quick return.

Conventional mechanical presses had a number of problems.

b) The drive unit is located in the head, and the head of the press body is large, so presses cannot be placed next to each other, and since the head rotates a large heavy object, a large foundation is required to prevent vibration. (Explanation) It is difficult to adjust the length and width, otherwise it becomes complicated.

c) Overload prevention must be strictly prohibited.

Furthermore, conventional hydraulic presses have the following problems.

a) The main motor has a capacity of 8, b) Large losses in the hydraulic circuit; C) The hydraulic unit is noisy.

The present invention has the following drawbacks:
The hydraulic press is hydrostatically driven by an external device 9. In this case, the external drive device is a type of biston pump, but the crankshaft is connected to the flywheel by a clutch, and the crankshaft is also equipped with a brake. One stroke of this piston pump corresponds to one stroke of the hydraulic press. Further, a cam is provided on the crankshaft, and by moving a small piston with the cam, the slide knockout and bottom knockout of the hydraulic press body are hydraulically moved in synchronization with the movement of the press slide.

Examples of the above configuration will be described below. FIG. 1 shows a press drive device installed separately from the press body.

11 is a piston, which is connected to the connecting rod 9 through a pin IO. The connecting rod 9 is connected to the crankshaft 5 at a crank pin 8 located in the middle of the crankshaft 5, and is driven by the crankshaft. A clutch hub 4 is fitted to one end of the crankshaft 5. A clutch disk 1 is attached around a clutch hub 4. A clutch disc 1 is provided between a flywheel 3 rotatably supported by a crankshaft 5 and a clutch 2. When the clutch 2 is engaged, the rotation of the Fuller blue wheel 3, which is constantly rotating, is transmitted through the clutch disc 1. It is transmitted to the clutch hub 4 and turns the crankshaft 5. Then, the movement of the crank pin 8 causes the piston 11 to move in and out in the left-right direction in FIG. 1 via the connecting rod 9 and pin 10.

When the piston 11 moves left and right, oil is pushed out and enters the lower surface of the piston rod 51 through circuit A in FIG. Then, the slide 52 is lowered.

Further, the oil in the upper part of the piston of the piston rod 51 is sucked into the rear of the piston 11 through the circuit B as shown in FIG.

When the piston 11 reaches the longest end, the press slide 52
reaches bottom dead center. When the piston 11 returns, oil flows through the circuits A and B in the opposite direction to the above, and the press slide 52
will rise. Near the top dead center of the press slide 52, the first
°The clutch 2 in the diagram is disengaged, the brake 29 is activated, the piston pump stops, and the press also stops at the same time.

While the crankshaft 5 is rotating, the cams 15, 16
lever 19.20 through cam roller 17.18 by
swings as shown in FIG. 3, and the pistons 27 in the cylinders 25 and 26 are reciprocated by the rods 23S24.

The springs 21 and 22 function to return the rods 23 and 24 toward the piston. The oil in the cylinder section 26 is pushed out and the circuit 0. Slide knockout piston 53 (Fig. 4) through D, bottom knockout pin 5
Stick out 4. Slide knockout pin 28 is a brake disc (Fig. 1), 50 is a press body frame (Fig. 4), 61, 62, 64 is a relief valve, 63 hash: 165, 72 is a solenoid valve for slide adjustment, 67 is a booster pump, 66 is a relief valve, 68 is an air-hydraulic converter, and 69.70 is a leaf valve.

It is constructed and driven as described above. According to this, the hydraulic press is hydrostatically driven from outside the press, so it is suitable as a quiet drive device for a high-speed hydraulic press. In particular, the present invention can eliminate the drawbacks of conventional hydraulic presses, such as the large capacity of the main motor, and the problem of increased losses in the hydraulic circuit.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a press drive device according to the present invention. Figure 2 is a cross-sectional view taken in the direction of the ■ arrow in Figure 1''. Figure 3 is a view taken in the direction of the ■ arrow in Figure 1. Figure 4 is a cross-sectional view of the drive device for the press slide provided within the press body frame. Figures 5 (a) and (b) are circuit diagrams. In the figures: 1 clutch disc 2 clutch 3
Flywheel 4 Clutch hub 5 Crankshaft 6 Motor 7 Belt
8 Crank pin 9 Connecting rod 1
o Pin 11 Piston 15 Cam 16 Cam 17 Cam roller 18 Cam roller 19 Lever 20 Lever 21 Spring 22 Spring 23 Rod 24 Rod
25 cylinder 26 cylinder 27
Piston 28 Brake disc 29
Brake 50 Press body frame 52
Press slide 53 Slide knockout pin
54 Bottom knockout pin 61.62.64
Relief valve 65, 72 Slide adjustment slide/id valve 66 Relief valve 6
1 Booster pump 68 Pneumatic hydraulic converter
69,70 Relief valve and above Applicant Sumitomo Heavy Industries, Ltd. Sub-Agent Patent Attorney Isamu Ohashi Figure 2 16) Figure 3 fA4 [J.

Claims (1)

[Claims] A drive device is provided outside the forging machine, and the drive device is composed of a piston pump, and the piston of the piston pump is driven via a crankshaft, and the crankshaft is connected to a flywheel by a clutch at one end, and the other A brake is provided at the end, and a cam is provided on the crankshaft, and by moving a small piston with the cam, the slide knockout and bottom knockout of the hydraulic press body are hydraulically moved in synchronization with the movement of the press slide. A drive device for a forging machine characterized by the following features: