JP4319631B2 - Forging press lubrication equipment - Google Patents

Description

  The present invention relates to a lubricating device for a forging press. More specifically, the present invention relates to a lubrication apparatus in a forging press in which a lubricant is sprayed on a mold surface while a pair of upper and lower molds are separated in order to improve billet flow and mold releasability in the mold.

As a lubricating device for a forging press, there is a technique shown in Conventional Example 1 (Non-Patent Document 1).
As shown in FIG. 7, the lubricating device of the forging press of the conventional example 1 has the spray nozzle 100 attached to the upper link 111 of the parallel link 110, and the lower die 112 of this parallel link 110 is placed on the lower mold M1. It is fixed to bolster B. On the other hand, a connecting cylinder 120 (or connecting lever) is connected between one vertical link 113 of the parallel link 110 and the slide S to which the upper mold D2 is attached. A lubricant is supplied to the spray nozzle 100 so that the lubricant can be sprayed onto the mold surface from the nozzle 101 at the tip.
The spray nozzle 100 in this lubricating device approaches and separates from the mold in conjunction with the vertical movement of the slide S, and when the slide S rises and the upper mold M2 moves away from the lower mold M1, the nozzle 101 moves in a pair. Inserted between the molds M1 and M2, and when the slide S descends, it operates to retreat from between the pair of upper and lower molds M1 and M2.

In the above-described lubrication apparatus, the spray nozzle 100 can be moved closer to and away from the operation timing of the slide S of the forging press, so that interference between the nozzle 101 and the mold can be reliably prevented.
Further, since the nozzle 101 is disposed at a substantially constant position while the slide S is stopped at the top dead center, the lubricant is surely supplied to the mold M1 while the slide S is stopped at the top dead center. , M2. Therefore, it is possible to take a long time to spray the lubricant from the nozzle 101 to the mold, and lubrication can be performed effectively.

  However, since the movement of the spray nozzle 100 is interlocked with the operation of the slide S of the forging press, the oil sliding device of the conventional example 1 has no freedom in movement of the spray nozzle. For this reason, if the stop position of the top dead center of the forging press varies for each cycle, the position where the nozzle 101 is arranged also varies. Then, even if a predetermined amount of lubricant is sprayed from the nozzle 101, depending on the shape and position of the mold, there may be a place where the amount of lubricant sprayed is insufficient. There is a risk of deterioration.

Plastic Processing Technology Series 4 Forging 350 pages Edited by Japan Society for Technology of Plasticity Corona Publishing August 30, 1995

  In view of the above circumstances, an object of the present invention is to provide a lubricating device for a forging press that can keep the sprayed state of the lubricant to the mold optimally.

A lubricating device for a forging press according to a first aspect of the present invention is a lubricating device for spraying a lubricant onto the surfaces of a pair of upper and lower molds in the forging press, the spray nozzle having a nozzle for spraying the lubricant on the die surface at the tip, The spray nozzle between a forward position where the nozzle is inserted at a spray position between the pair of upper and lower molds and a backward position where the nozzle is separated from between the pair of upper and lower molds. And a forward / backward movement mechanism that is attached to the forward / backward movement mechanism and a fine movement mechanism that moves the spray nozzle back and forth by a small amount. The forward / backward movement mechanism swings back and forth as the slide moves up and down. A second swing link that is pivotally attached to a tip of the first swing link and engaged with the spray nozzle, and the second swing link. Link forward and backward Ri Do and a driving means for oscillating by a minute angle, the drive means comprises a pair of pressing cylinders attached to the first swinging link, said pair of pressing cylinders, in the second swing link The second swing link is configured to swing in the front-rear direction by pressing the pressed portions formed at portions away from the shaft mounting portion with respect to the first swing link. To do .
A lubricating device for a forging press according to a second aspect of the invention is a lubricating device for spraying a lubricant onto the surfaces of a pair of upper and lower molds in the forging press, the spray nozzle having a nozzle for spraying the lubricant on the die surface, The spray nozzle between a forward position where the nozzle is inserted at a spray position between the pair of upper and lower molds and a backward position where the nozzle is separated from between the pair of upper and lower molds. And a forward / backward movement mechanism that is attached to the forward / backward movement mechanism and a fine movement mechanism that moves the spray nozzle back and forth by a small amount. The forward / backward movement mechanism swings back and forth as the slide moves up and down. A second swing link that is pivotally attached to a tip of the first swing link and engaged with the spray nozzle, and the second swing link. Link forward and backward To become a drive means for oscillating by a minute angle, the drive means comprises a rotary shaft supported by the first swing link, and an eccentric shaft portion formed in a central portion of said rotary shaft, said rotary shaft The eccentric shaft portion is rotatably fitted to a boss portion formed at a position away from the shaft attachment portion of the second swing link with respect to the first swing link, The second swing link is configured to swing back and forth by rotation of the eccentric shaft portion.

According to the first invention, the following effects are obtained.
a) The second swing link is swung back and forth by the fine movement mechanism while the spray nozzle is advanced to the forward movement position by the forward / backward movement mechanism and positioned between the upper and lower molds or during the movement to the forward movement position. Then, the spray nozzle moves forward and backward by a minute amount. As a result, since the spraying position of the lubricant on the mold changes in a small amount, even if the mold has a complicated shape, the lubricant can be applied over the entire surface without causing poor lubrication.
b) When the pair of pressing cylinders extend and retract in opposite directions, the second swinging link swings in the front-rear direction around the shaft attachment portion with the first swinging link. The nozzle moves back and forth slightly. Therefore, a favorable lubricant application surface can be obtained even for a mold having a complicated shape.
According to the second invention, the following effects are obtained.
a) The second swing link is swung back and forth by the fine movement mechanism while the spray nozzle is advanced to the forward movement position by the forward / backward movement mechanism and positioned between the upper and lower molds or during the movement to the forward movement position. Then, the spray nozzle moves forward and backward by a minute amount. As a result, since the spray position of the lubricant on the mold is changed in a minute amount, even if the mold has a complicated shape, the lubricant can be applied over the entire surface without causing a poorly lubricated portion.
b) When the rotating shaft is rotated by the drive motor, the boss portion fitted to the eccentric shaft portion rotates eccentrically, so that the second swing cylinder moves back and forth around the shaft attachment portion with the first swing link. Swing in the direction. As a result, the spray nozzle moves back and forth slightly. Therefore, a favorable lubricant application surface can be obtained even for a mold having a complicated shape.

Next, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is an overall explanatory view of a forging press lubrication apparatus according to an embodiment of the present invention. In FIG. 1, symbol P indicates a forging press, symbols M1 and M2 indicate an upper die and a lower die, and symbol S indicates a slide S that is moved up and down by rotation of a crankshaft (not shown). . When the slide S moves up and down, the upper mold M1 moves up and down and moves closer to the lower mold M2. When the upper mold M1 approaches the lower mold M2, the material in the lower mold is punched, and when the upper mold 12 is separated upward, the lubricant is sprayed on the surfaces of the upper and lower molds M1, M2. .

As a device for spraying the lubricant as described above, the lubrication device A is provided. The lubrication apparatus A includes a spray nozzle 10, a forward / backward moving mechanism 20, and a fine movement mechanism 30.
The spray nozzle 10 includes a nozzle body 11 and a nozzle 12 attached to the tip of the nozzle body 11. The nozzle main body 11 is guided by a slide guide 13 so as to be movable in the front-rear direction (arrow a and b directions).

The forward / reverse mechanism 20 includes a first swing link 21 and a connection link 22. The first swing link 21 has a base end portion rotatably attached to a suitable position of the press frame by a support shaft 23. Further, a distal end portion of the connection link 22 is coupled to the intermediate portion of the first swing link 21 by a support shaft 24, and a base end portion of the connection link 22 is attached to a bracket 25 on the slide S side by a support shaft 26. Are combined. The first swing link 21 is engaged with the spray nozzle 10 via a second swing link 31 described later.
With the above configuration, when the slide S moves up and down, the first swing link 21 swings between the solid line position and the imaginary line position via the connection link 22, and the spray nozzle 10 moves between the retracted position and the forward position. Reciprocates. In FIG. 1, the solid line indicates the advance position of the spray nozzle 10, and the nozzle 12 is inserted between the upper and lower molds M <b> 1 and M <b> 2 at the advance position. The retracted position is a position where the nozzle 12 moves to the left in the figure and retracts from the upper and lower molds M1, M2 to the nozzle.

Next, the fine movement mechanism 30 will be described with reference to FIGS.
The fine movement mechanism 30 includes a second swing link 31 and pressing cylinders 41 and 42 constituting a driving unit. The intermediate portion of the second swing link 31 is pivotally supported by the swing shaft 32 at the tip end portion of the first swing link 21. A bifurcated engagement fitting 33 that engages with the engagement roller 14 attached to the spray nozzle 10 is provided at the tip of the second swing link 31.
As shown in FIG. 3, a pressed portion 34 is formed at the rear end portion of the second swing link 31.
A pair of pressing cylinders 41, 42 are arranged at both side positions sandwiching the pressed portion 34, and the pressing cylinders 41, 42 are fixed at appropriate positions of the first swinging swing link 21.

  The pair of pressing cylinders 41 and 42 are both hydraulic cylinders or pneumatic cylinders having the same structure. The structure is such that a piston 44 is inserted into the cylinder 43, and when a pressure medium such as pressurized oil or pressurized air is supplied into the compartment 45, the piston extends. The contraction of the piston 44 is performed by extending the pressing cylinder 42 on the opposite side. The expansion / contraction control of the pair of pressing cylinders 41 and 42 is performed by a known means such as a control valve provided in a circuit for supplying a pressure medium to the chamber 45 of each pressing cylinder 41 or 42.

3A is a state in which the right pressing cylinder 41 is extended and the tip of the second swing link 31 is right-justified, and FIG. 3B is a state in which the left pressing cylinder 42 is extended to 2 shows a state where the tip of the swing link 31 is left-justified.
When this movement is repeated, the movement of moving the nozzle 11 of the spray nozzle 10 forward and backward by a minute amount can be repeated.

FIG. 4 shows a lubricating operation in the lubricating device of the embodiment. As the slide S rises, the first swing link 21 swings to the right, and the spray nozzle 10 advances to the advanced position. In this state, the nozzle 11 is located at the spray position between the upper and lower molds M1, M2. When the second swing link 31 is swung by the pair of pressing cylinders 41 and 42 at this forward position, the spray nozzle 10 moves back and forth by a small amount, and the position of the nozzle 12 also moves back and forth by a small amount Ss.
In the example of FIG. 4, the forward / backward movement is performed twice in a small amount, but this number may be one time or three or more times. Further, the fine movement may be performed while the spray nozzle 10 is moving, in addition to the fine movement at the forward position. When the first swing link 21 is left-justified as the slide S descends, the spray nozzle 10 moves to the left in the figure and retracts to the retracted position. Symbol SL indicates a stroke between the forward position and the backward position.

  As in the above embodiment, when the pair of pressing cylinders 41 and 42 are alternately expanded and contracted, the second swing link 31 swings about a small angle about the shaft 32. As a result, the nozzle 12 at the tip of the spray nozzle 10 can be moved back and forth by a small amount to change the injection position of the lubricating oil with respect to the molds M1 and M2. As a result, even if the surface shape of the mold is complicated, the entire surface can be lubricated without causing poor lubrication.

Next, a lubricating device according to a second embodiment of the present invention will be described with reference to FIGS.
In the drawing, the first swing link 21, the support shaft 24, the second swing link 31, the support shaft 32, and the engaging portion 33 are substantially the same as those in the above-described embodiment, and thus the description thereof is omitted. Since the difference lies in the fine movement mechanism, only the fine movement mechanism of this embodiment will be described below.
The fine movement mechanism of the present embodiment includes a rotating shaft 51, a drive motor 53, and a boss portion 55 on the second swing link 31 side. The rotating shaft 51 has an eccentric shaft portion 52 in the center portion. A drive motor 53 is connected to the rotating shaft 51 so as to rotate.
On the other hand, the boss portion 55 described above is provided at the base end portion of the second swing link 31, and this boss portion 55 is formed in a U shape in a side view. Sliding pieces 56 are attached to the left and right inner walls, and are in contact with the outer periphery of the eccentric shaft 52.

  According to the above configuration, when the eccentric shaft portion 52 of the rotating shaft 51 is rotated by the drive motor 53, the boss portion 55 of the second swing cylinder 31 swings left and right, and the second swing link 31 moves to the support shaft. Oscillates by a slight angle around 32. As a result, the nozzle 12 at the tip of the spray nozzle 10 can be moved back and forth by a small amount to change the injection position of the lubricating oil with respect to the molds M1 and M2. Therefore, even in this embodiment, even if the surface shape of the mold is complicated, the entire surface can be lubricated without causing a poorly lubricated portion.

  In the present invention, the stroke Ss moved back and forth by the fine movement mechanism is arbitrary and may be set according to the size of the mold. Generally, 10-20 mm is suitable.

1 is an overall explanatory view of a lubricating device for a forging press according to an embodiment of the present invention. It is a front view of the back-and-forth mechanism of this embodiment. It is operation | movement explanatory drawing of the fine movement mechanism of FIG. It is explanatory drawing of the lubrication effect | action in the lubricating device of this invention. It is a front view of the fine movement mechanism which concerns on other embodiment of this invention. It is a side view of the fine movement mechanism. It is a whole explanatory drawing of the conventional lubrication apparatus.

Explanation of symbols

P Forging press S Slide 10 Spray nozzle 11 Nozzle body 12 Nozzle 20 Back and forth mechanism 21 First swing link 30 Fine motion mechanism 31 Second swing link 41, 42 Pressing cylinder 51 Rotating shaft 52 Eccentric shaft portion 53 Drive motor 55 Boss portion

Claims (2)

A lubricating device that sprays a lubricant onto the surfaces of a pair of upper and lower molds in a forging press,
A spray nozzle with a nozzle at the tip for spraying lubricant onto the mold surface;
The spray nozzle is moved in the front-rear direction between a forward position where the nozzle is inserted at a spray position between the pair of upper and lower molds and a backward position where the nozzle is separated from the pair of upper and lower molds. A forward / backward moving mechanism,
It is attached to the forward / backward movement mechanism, and consists of a fine movement mechanism for moving the spray nozzle back and forth by a small amount,
The forward / reverse mechanism includes a first swing link that swings in the front-rear direction as the slide moves up and down,
The fine movement mechanism is pivotally attached to the tip of the first rocking link and engaged with the spray nozzle, and the second rocking link rocks the second rocking link by a slight angle in the front-rear direction. Ri Do a drive means,
The drive means comprises a pair of pressing cylinders attached to the first swing link;
The pair of pressing cylinders pushes the second swing link back and forth by pressing the pressed portions formed in the second swing link away from the shaft mounting portion with respect to the first swing link. A lubricating device for a forging press, wherein the lubricating device is configured to swing in a direction . A lubricating device that sprays a lubricant onto the surfaces of a pair of upper and lower molds in a forging press,
A spray nozzle with a nozzle at the tip for spraying lubricant onto the mold surface;
The spray nozzle is moved in the front-rear direction between a forward position where the nozzle is inserted at a spray position between the pair of upper and lower molds and a backward position where the nozzle is separated from the pair of upper and lower molds. A forward / backward moving mechanism,
It is attached to the forward / backward movement mechanism, and consists of a fine movement mechanism for moving the spray nozzle back and forth by a small amount,
The forward / reverse mechanism includes a first swing link that swings in the front-rear direction as the slide moves up and down,
The fine movement mechanism is pivotally attached to the tip of the first rocking link and engaged with the spray nozzle, and the second rocking link rocks the second rocking link by a slight angle in the front-rear direction. Drive means,
The drive means comprises a rotation shaft supported by the first swing link, an eccentric shaft portion formed at a central portion of the rotation shaft, and a drive motor for rotating the rotation shaft,
The eccentric shaft portion is rotatably fitted to a boss portion formed at a position away from the shaft attachment portion of the second swing link with respect to the first swing link, and the first shaft is rotated by the rotation of the eccentric shaft portion. forging press lubricating device you characterized in that it is configured to swing in the longitudinal direction of second swing link.

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