JPH069715Y2 - Spraying amount adjusting device for mold lubricant - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a lubricant spraying device for spraying a lubricant to the surface of a die such as a forging die in the form of powder mist, and particularly to the flow rate of a plurality of spray nozzles. The present invention relates to a spray nozzle adjusting device for a mold lubricant capable of adjusting the balance in good balance.

(Prior Art) In a forging press or the like, in order to smoothly take out the forged product from the die, before the object to be formed is put into the die, a lubricant (graphite aqueous solution) and compressed air are put on the die surface. An air flow mixed fluid (hereinafter referred to as a mold lubricant) is sprayed. A plurality of spray nozzles are attached to the mold lubricant supply pipe, and the spray nozzles move in and out between the upper and lower molds during the pressing operation to spray the mold lubricant onto a plurality of molds at once. The die lubricant is supplied to the supply pipe intermittently in response to the vertical movement of the upper die. Further, the tip of the lubricant supply pipe is closed,
When the inner diameter is the same from the base to the tip, and therefore the diameter of the spray nozzle is the same, the flow velocity in the supply pipe decreases as the mold lubricant is pumped from the base toward the closed end. The higher the compression state, the more pressure is reflected at the closed end, and the higher the pressure gradient toward the tip of the tube. In the mold lubricant supply pipe having such a configuration, the discharge amount of the spray nozzles arranged side by side in the axial direction is larger at the tip end nozzle due to the fluid pressure inside the pipe, On the base side of the pipe, the spray amount of the nozzle is insufficient. For molds of the same type and size, it is necessary to make the spraying amount uniform for each mold. Conventionally, in order to eliminate the imbalance in the spraying amount of each nozzle, the nozzle diameters may be different, The inner diameter of the mold lubricant supply pipe is gradually increased or decreased in the axial direction to achieve a balance.

(Problems to be solved by the invention) In the above-mentioned conventional spray nozzle device for mold lubricant, several kinds of nozzles having different diameters are attached, or the supply pipe is formed in a taper shape in the axial direction to reduce the spray amount. Since it is balanced, it often takes a trial process to determine its dimensions, and once its shape is determined, it is difficult to change it while the forging machine is in operation, and it is versatile for various forging dies. Without
Since it is necessary to always prepare several kinds of nozzle devices, there is a drawback that the cost becomes high.

The present invention allows easy adjustment of the spraying amount while the forging machine is in operation, and the spraying amount can be adjusted steplessly so that the proper amount of the mold lubricant can be applied to each mold used. To provide a device.

(Means for Solving the Problems) A mold lubricant spraying device according to the present invention is a mold lubricant that moves in and out between upper and lower molds and sprays a mold lubricant of a gas-liquid mixed fluid onto the mold surfaces. In the spraying device, a lubricant supply pipe which is capable of moving in and out between the upper and lower molds and has a plurality of spray nozzles along the axial direction on the side, and is arranged in the pipe of the lubricant supply pipe along the axial direction. And a plurality of flow rate adjusting plates, and each of the flow rate adjusting plates is pivotally supported on the supply pipe so that the flow rate adjusting plate can be adjusted from the outside of the lubricant supply pipe.

(Embodiment) Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 5 is a partial side sectional view showing the positional relationship between the upper and lower forging dies of the forging press and the lubricant supply pipe. Press body 1
The lower mold 2 is installed on the base part of the above, and the upper mold 4 is attached to the lower surface of the ram 3 which moves up and down with respect to the base part so as to face the lower mold 2. Before the upper mold 4 is raised and the next object to be molded is supplied to the lower mold 2, the lubricant supply pipes 5 for the upper mold and the lower mold are horizontally arranged between the upper and lower molds 4, 2. And a mold lubricant, which is a mixed fluid of a lubricant solution and pressurized air, is sprayed onto the mold surfaces of the upper and lower molds from a plurality of spray nozzles 6 provided on the side of each supply pipe. .
The mold lubricant of each supply pipe is supplied from an individual supply source via the arm 10. The supply pipe 5 is retracted from between the upper and lower molds during the supply and press operation of the molding target,
The molded product is smoothly released from the upper and lower molds 4 and 2 by spraying and applying the mold lubricant.

FIG. 1 is a vertical sectional view of a spray nozzle device of a forging machine according to an embodiment of the present invention, and FIG. 2 is an enlarged transverse sectional view taken along the line AA of FIG. The lubricant supply pipe 5 dedicated to the upper mold or the lower mold is fixed to the hollow movable arm 10 by the bolt 9 and the pipe tip is closed. The mold lubricant is supplied. A plurality of (four in the illustrated embodiment) spray nozzles 6 are detachably attached to a side portion of the lubricant supply pipe 5 at predetermined intervals in the pipe axial direction, and are supplied from individual fluid sources. The mixed fluid is sprayed from these spray nozzles 6 onto the above-mentioned upper mold or lower mold.
As described above, since the tip of the supply pipe 5 is closed, generally, the spray amount from the spray nozzle 6 on the side close to the tip of the supply pipe 5 (position I in FIG. 1) is the largest. The amount of spray becomes smaller toward III, IV and the base side of the supply pipe.

In order to solve this problem, in this embodiment, a flow rate adjusting plate 14 is provided between the spray nozzles 6. Specifically, the supply pipe 5 is divided into a plurality of pieces in the axial direction, and the outer cylinder body 22 of the adjusting plate 14 is interposed and fixed to the divided portion, and the flow rate adjusting plate 14 is housed in the outer cylinder body. Flow rate adjusting plate 14
Is a disk having a slight gap t in the inner peripheral surface of the outer cylinder, in other words, in the inner diameter portion of the lubricant supply pipe 5,
Is fixed by a pin 12 to a swivel shaft 11 which is perpendicular to the axis of the swivel shaft, and the swivel shaft 11 is rotated in a range of approximately 90 ° by the rotating operation of the swivel shaft 11. The gap between and can be changed. Swivel axis 11 is second
As shown in the drawing, the lubricant supply pipe 5 is vertically penetrated, and a rectangular head 13 is formed at one end thereof, and a retaining nut 15 is screwed at the other end thereof. Reference numeral 16 is an O-ring for preventing fluid leakage at the penetrating portion of the swivel shaft 11.

3 is a partial side sectional view taken along the line BB in FIG. 2, and FIG. 4 is a partial front view seen from the arrow C in FIG. The head 13 of the swivel shaft 11 has a tooth-shaped circular portion 13a over a portion of four half, and a hollow male screw member 18 is screwed to a protruding block 17 formed on the outer side of the supply pipe. A lock pin 19 and a compression spring 20 are housed in the hollow portion of the member 18. Reference numeral 21 is a metal fitting for the spring 20. The tip of the lock pin 19 is pushed by the spring 20 and protrudes from the hollow male screw member 18, and engages with the tooth-shaped circular portion 13a of the head portion 13 of the swivel shaft 11 to prevent the swivel shaft 11 from rotating.
The head 13 of the swivel shaft 11 resists the pressing force of the lock pin 19.
The adjustment plate 14 turns the supply pipe 5 by turning the tool with a tool.
The angle is changed with respect to the axial direction of, and the flow rate of the mold lubricant passing through this portion is adjusted. In the embodiment of FIG. 1, for example, when the spraying amount of each spraying nozzle 6 is made uniform, the rotation angle of the adjusting plate on the tip side of the supply pipe is increased, and the adjusting plate moves toward II, III and the pipe base side. The angle of 14 is adjusted to be small, that is, the gap through which the fluid passes is adjusted to be small. In addition, the angle of each adjusting plate can be freely changed depending on the type of upper and lower molds corresponding to each nozzle so that an appropriate spray amount can be obtained.

(Effect of the Invention) As described above, according to the present invention, the spraying amount of the mold lubricant from each nozzle can be arbitrarily adjusted by a simple operation of the adjusting plate. There is an effect that it is not necessary to prepare, and an appropriate amount of spraying can be performed for each mold without stopping the operation of the forging machine.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a vertical sectional view of a spray nozzle device according to an embodiment of the present invention, FIG. 2 is an enlarged transverse sectional view taken along the line AA of FIG. 1, and FIG. 2 is a partial side cross-sectional view taken along the line BB of FIG. 2, FIG. 4 is a partial front view seen from the arrow C of FIG. 3, and FIG. 5 is a vertical forging die of a forging press and a lubricant supply. It is a partial side cross-sectional view showing the positional relationship of the tubes. 2 ... Lower mold, 4 ... Upper mold, 5 ... Lubricant supply pipe, 6 ... Spray nozzle, 11 ... Swivel shaft, 13 ... Head, 14 ... Flow rate adjusting plate, 15 ... Nut, 19 ... Lock pin, 20 …spring.

Claims (1)

[Scope of utility model registration request] 1. A mold lubricant spraying device which moves in and out between upper and lower molds (4, 2) and sprays a mold lubricant of a gas-liquid mixed fluid onto the mold surfaces. ) A lubricant supply pipe (5) which can be moved in and out of the space and has a plurality of spray nozzles (6) on the side along the axial direction, and in the pipe of the lubricant supply pipe (5) along the axial direction. A plurality of flow rate adjusting plates (14) arranged, and each of the flow rate adjusting plates (14) is attached to the supply pipe (5) so that it can be adjusted from the outside of the lubricant supply pipe (5). A spraying amount adjusting device for a mold lubricant, which is pivotally supported.