JP6514650B2 - Forging press - Google Patents

Description

  The present invention relates to a forging press, and more particularly to a cooling structure of the clutch.

  2. Description of the Related Art A mechanical forging press is known which rotationally drives a crankshaft to move a slide up and down. For example, as disclosed in Patent Document 1, it is possible to transmit the rotation of a flywheel rotationally driven by the main motor to the crankshaft, transmit the rotation of the flywheel to the crankshaft, raise and lower the slide, and perform forging work. I want to do it.

  In this type of forging press, when the clutch is engaged, the temperature rises at once from the stopped state to the rated rotation, so that heat due to slip is generated on the clutch surface of the clutch plate and the friction block. The heat increases the wear rate, and the life of members (such as linings) constituting the clutch surface is reduced. In addition, the distortion due to heat causes the clutch to deform and cause malfunction, resulting in partial contact of the lining. Furthermore, there is a problem that the packing of the cylinder for driving the clutch surface is hardened by heat and a leak occurs.

  For this reason, it is necessary to force the clutch surface to cool. For example, as in Patent Document 1, there is known a method of cooling a clutch surface using hydraulic oil for driving a brake mechanism or a clutch mechanism.

  Further, there is also a method of using high pressure air or a blower which drives a brake mechanism or a clutch mechanism, or providing a blade on a clutch case to blow air to cool the clutch surface.

JP 2011-38615 A

  There is also a method of increasing the size of the clutch and increasing the lining area to lower the surface pressure in order to increase the durability of the clutch surface, but there is a problem that the size of the entire clutch mechanism increases.

  In the method of Patent Document 1 described above, the hydraulic pressure for driving the brake mechanism and the clutch mechanism is used in a large amount to cool the clutch surface, so the hydraulic pump and the electric motor are still upsized. In addition, oil management is required, and there is a problem that the cost for equipment installation also increases.

  On the other hand, in the case of using air cooling, the cooling efficiency is low and heat generation can not be suppressed. In addition, there is a problem that air containing foreign matter in the factory is sent into the inside of the clutch mechanism by the blower and the foreign matter adheres to the lining surface to cause slippage.

  The present invention has been made in view of such a point, and an object thereof is to appropriately cool the clutch surface to suppress heat generation without increasing the size of the clutch mechanism.

  In order to achieve the above object, in the present invention, at least one of the clutch plate and the friction block is cooled by the cooling water.

Specifically, in the first invention, the forging press performs forging operation by transmitting the rotation of the flywheel rotationally driven by the main motor to the crankshaft via the clutch mechanism to move the slide up and down.
The above clutch mechanism is
A clutch plate that is integral with the above-mentioned crankshaft,
A friction block contacting the clutch plate;
A fluid pressure cylinder for pressing the friction block against the clutch plate;
A fluid inlet port for feeding high pressure fluid to the fluid pressure cylinder;
A rotary joint provided with the fluid inlet port;
And a cooling water passage for cooling at least one of the clutch plate and the friction block, through which the cooling water different from the high pressure fluid passes .
The cooling water passage is disposed radially outward of the fluid inlet port .

  According to the above configuration, the cooling water passing through the cooling water passage cools at least one of the clutch plate and the friction block more efficiently than in the case of air cooling. Since the hydraulic oil is not used for cooling, there is no need to manage the hydraulic oil and the cost for equipment installation will not be high. Further, since the cooling water only passes through the cooling water passage and the connected piping, foreign substances in the factory do not adhere to the lining surface as in the case of air cooling. Furthermore, since the cooling is performed by cooling water different from the high pressure fluid that operates the fluid pressure cylinder, for example, when the high pressure fluid is high pressure air, it is not necessary to increase the capacity of a compressor or the like for feeding high pressure air.

In the second invention, in the first invention,
The coolant inlet port and the coolant outlet port of the coolant passage are provided at the same rotary joint.

  According to the above configuration, the rotary joint for feeding the high pressure fluid can be used for introducing and discharging the cooling water into the clutch mechanism including the rotating body, so that the number of parts can be reduced and the cost increase can be avoided.

  As described above, according to the present invention, the size of the clutch mechanism is increased by cooling at least one of the clutch plate and the friction block with cooling water different from high pressure fluid that presses the friction block against the clutch plate. Therefore, the clutch surface can be properly cooled to suppress heat generation.

It is a sectional view expanding and showing a clutch mechanism. It is a figure showing an outline of a forge press concerning an embodiment of the present invention. It is a side view showing a clutch mechanism.

  Hereinafter, embodiments of the present invention will be described based on the drawings.

  FIG. 2 shows a forging press 10 according to an embodiment of the present invention. This forging press 10 is, for example, a mechanical hot forging press, and a slide 1 and a bolster 2 to which a mold (not shown) is attached It is provided so as to face up and down in 3. The forging press 10 is configured such that the slide 1 connected by the connecting rod 5 to the rotatably driven crankshaft 4 moves up and down. A flywheel 8 rotationally driven by the belt 7 by the main motor 6 is connected to one end of the crankshaft 4 via a clutch 9 as a clutch mechanism. A brake device 12 is attached to the crankshaft 4 to stop the rotation of the crankshaft 4 and stop the slide 1. The forging press 10 rotationally drives the flywheel 8 at a predetermined speed by the main motor 6, turns on the clutch 9, transmits the rotation of the flywheel 8 to the crankshaft 4, and raises and lowers the slide 1 for forging. Is configured as. The forging press 10 is controlled by a controller 13.

  As shown in an enlarged view in FIG. 1, the clutch 9 includes a clutch plate 20 fixed to a flywheel 8 integral with the crankshaft 4. In a clutch case 9 a covering the clutch 9, a pneumatic cylinder 22 is provided which drives a friction block 21 in contact with the clutch plate 20. The pneumatic cylinder 22 includes a piston 22a to which the friction block 21 is fixed and a pressure chamber 22b into which high pressure air is introduced. An air pipe 22c communicates with the pressure chamber 22b. A rotary joint 23 is provided at the center of the flywheel cover 8a covering the clutch case 9a. The rotary joint 23 is provided with a fluid inlet port 22d for feeding the high pressure fluid to the pneumatic cylinder 22, and the fluid inlet port 22d is connected to the air pipe 22c. As shown in FIG. 2, high pressure air from the compressor 14 is supplied to the fluid inlet port 22 d through an air valve 15. The air valve 15 is controlled by the controller 13 so that the clutch 9 is controlled.

  Then, a cooling water inlet port 24 a for introducing the cooling water into the cooling water passage 24 shown in FIG. 1 and a warm cooling water returned from the cooling water passage 24 are returned to the rotary joint 23. The cooling water outlet port 24b is provided. In the present embodiment, the coolant passage 24 is provided on the opposite side to the friction block 21 of the clutch plate 20 fixed to the flywheel 8. However, it may be provided also on the friction block 21 side. Providing the cooling water passage 24 as wide as possible of the clutch plate 20 is advantageous in terms of increasing the cooling efficiency. As shown by a thick line in FIG. 3, the cooling water from the water supply device 16 is supplied to the cooling water passage 24 through a cooling water pipe 24c extending from the rotary joint 23 to the flywheel 8 side. The coolant returned from the coolant passage 24 is returned to the rotary joint 23 through the coolant pipe 24c on the return side. For example, in the present embodiment, two cooling water pipes 24c on the supply side and two cooling water pipes 24c on the return side are provided. However, the present invention is not limited thereto. May be Then, the cooling water from the water supply device 16 is supplied to the cooling water inlet port 24 a via the switching valve 17, and the warmed cooling water is returned to the water supplying device 16 from the cooling water outlet port 24 b via the switching valve 17. It is supposed to be recooled. The switching valve 17 is controlled by the controller 13.

  In the present embodiment, since the friction block 21 is not directly cooled by the cooling water, as shown by the two-dot chain line in FIG. 1, the friction is provided when the clutch 25 is connected by providing the blade 25 on the inner surface of the clutch case 9a. The temperature rise of the block 21 and its surroundings may be suppressed.

  As configured in this manner, in the present embodiment, the clutch plate 20 and the friction block 21 are cooled more efficiently by the cooling water passing through the cooling water passage 24 than in the case of air cooling. Since the hydraulic oil is not used for cooling, there is no need to manage the hydraulic oil and the cost for equipment installation will not be high. In addition, foreign substances in the factory do not adhere to the lining surface as in air cooling. Furthermore, since the cooling is performed by the cooling water different from the high pressure air for operating the pneumatic cylinder 22, it is not necessary to increase the capacity of the compressor or the like for feeding the high pressure air.

  In the present embodiment, since the inlet and the outlet of the cooling water are provided in the rotary joint 23 for feeding high pressure air to the side of the flywheel 8 which is a rotating body, the number of parts is reduced and the cost increase can be avoided.

  Therefore, according to the forging press 10 according to the present embodiment, the size of the clutch 9 is increased by cooling the clutch plate 20 with cooling water different from high pressure air that presses the friction block 21 against the clutch plate 20. Instead, the clutch plate 20 can be properly cooled to suppress heat generation.

(Other embodiments)
The present invention may be configured as follows for the embodiment.

  That is, in the above embodiment, industrial water may be supplied to the cooling water passage 24, or coolant may be supplied. The coolant passage 24 may be provided on the side of the piston 22 a driven by the pneumatic cylinder 22. In this case, it is necessary to take measures against water leakage in the drive unit.

  Further, in the above embodiment, the fluid pressure cylinder supplies high pressure air as the pneumatic cylinder 22, but high pressure oil may be supplied as a hydraulic cylinder. However, in that case, a hydraulic unit is required, and management of hydraulic oil is also required.

  The above embodiments are essentially preferable examples, and are not intended to limit the scope of the present invention, its applications and uses.

1 slide
2 Bolsta
3 frames
4 Crankshaft
5 Connecting rod
6 Main motor
7 belt
8 flywheel
8a Flywheel cover
9 Clutch (clutch mechanism)
9a clutch case
10 Forging Press
12 brake system
13 Controller
14 compressor
15 air valve
16 water supply equipment
17 switching valve
20 clutch plate
21 Friction block
22 Pneumatic cylinder
22a piston
22b pressure chamber
22c Air piping
22d fluid inlet port
23 Rotary joint
24 cooling water passage
24a cooling water inlet port
24b cooling water outlet port
24c Cooling water piping
25 feather

Claims (1)

In a forging press that transmits the rotation of a flywheel rotationally driven by a main motor to a crankshaft via a clutch mechanism to move a slide up and down to perform a forging operation,
The above clutch mechanism is
A clutch plate that is integral with the above-mentioned crankshaft,
A friction block contacting the clutch plate;
A fluid pressure cylinder for pressing the friction block against the clutch plate;
A fluid inlet port for feeding high pressure fluid to the fluid pressure cylinder;
A rotary joint provided with the fluid inlet port;
And a cooling water passage for cooling at least one of the clutch plate and the friction block, through which the cooling water different from the high pressure fluid passes.
The cooling water passage is disposed radially outward of the fluid inlet port ,
A forging press characterized in that the cooling water inlet port and the cooling water outlet port of the cooling water passage are provided at the same rotary joint .

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