Lubricant dripping device

Abstract

To provide a device for dropping lubricant so as to form a row to a surface of a workpiece to be pressed.SOLUTION: A device 10 for dropping lubricant Lb to a surface of a workpiece 15 to be pressed includes: a pipe 13 bridging across a transverse direction above the workpiece 15 and including a plurality of holes 11 formed along the extension direction thereof; and a droplet generator 12 provided to each hole 11 to change the lubricant Lb that flows out through the hole 11 from the inside of the pipe 13 into a droplet Dp.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a device for dripping droplets, and more particularly to a device for dripping lubricant onto the surface of a workpiece being pressed. [Background technology]

[0002] Patent Document 1 discloses a method for applying lubricant to a workpiece being pressed. Patent Document 2 discloses a device for spraying lubricant onto gears. The device includes a pipe with a row of outlet holes on the surface of the pipe. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-095772 [Patent Document 2] Japanese Patent Application Publication No. 6-213285 Summary of the Invention [Problem to be solved by the invention]

[0004] In one aspect, the present invention provides an apparatus for applying a series of drops of lubricant to a surface of a workpiece being pressed. [Means for solving the problem]

[0005] [1] A device for dripping lubricant onto the surface of a workpiece to be pressed, a pipe that is hung horizontally above the workpiece and has a plurality of holes formed along its extending direction; a droplet generator disposed in each of the holes for converting lubricant flowing from within the pipe through the holes into droplets; A lubricant dripping device comprising:

[0006] [2] The droplet generator is a nozzle protruding from the outer surface of the pipe. [1] A device for dripping lubricant according to the present invention.

[0007] [3] the droplet generator, a groove that starts at the hole, goes around the outer surface of the pipe, and returns to the hole; The lubricant flows along the groove and falls as droplets at a position on the groove facing the workpiece, The pipe rolls to change the position where the droplet falls on the groove. [1] A device for dripping lubricant according to the present invention. [Effects of the Invention]

[0008] In one aspect, the present invention provides an apparatus for applying a series of drops of lubricant to a surface of a workpiece being pressed. [Brief explanation of the drawings]

[0009] [Figure 1] The lower part is a perspective view of the dropping device, and the upper part is a cross-sectional view of the droplet generator. [Figure 2] FIG. [Figure 3] The top diagram is a perspective view of the dropping device, the middle diagram is a partial perspective view of the droplet generator, and the bottom diagram is a cross-sectional view of the droplet generator. [Figure 4] The upper part is a partial perspective view of the droplet generator according to the embodiment, the middle part is a cross-sectional view of the wide side of the groove, and the lower part is a cross-sectional view of the narrow side of the groove. DETAILED DESCRIPTION OF THE INVENTION

[0010] The lower part of Fig. 1 is a perspective view of a dripping device 10 according to the first embodiment. The dripping device 10 drips droplets Dp of lubricant onto the surface of a workpiece 15 to be pressed. The workpiece 15 shown in Fig. 1 is an example. In one example, droplets Dp are supplied to the workpiece 15 as it passes under a pipe 13. The droplets Dp that fall on the surface of the workpiece 15 form a coating film 17.

[0011] The dripping device 10 shown in the lower part of Fig. 1 includes a pipe 13. The pipe 13 is suspended above a workpiece 15. A plurality of holes 11 are provided along the extension direction of the pipe 13. Both ends of the pipe 13 are connected to hoses 14 via couplings 16. The lubricant is supplied into the pipe 13 through the hoses 14. One of the ends of the pipe 13 may terminate without being connected to the hoses 14.

[0012] The dropping device 10 shown in the lower part of Fig. 1 is equipped with a plurality of droplet generators 12. A droplet generator 12 is provided for each of the holes 11. The upper part of Fig. 1 is a cross-sectional view of the droplet generator 12. The lubricant Lb flows from inside the pipe 13 through the holes 11 to the outside of the pipe 13. The lubricant Lb may be oil-based or water-soluble. The lubricant Lb is also called press processing oil.

[0013] 1, the droplet generator 12 is a nozzle protruding from the outer surface of the pipe 13. The flowing lubricant Lb forms a meniscus 18 at the tip of the droplet generator 12. The enlarged meniscus 18 turns into droplets Dp and falls onto the surface of the workpiece 15. In this way, the dripping device 10 drips the lubricant droplets Dp onto the surface of the workpiece 15 in a line.

[0014] FIG. 2 is a partial cross-sectional view of a dripping apparatus 20 according to a comparative example. The dripping apparatus 20 includes a pipe 23. The pipe 23 includes only a hole 21 and does not include a droplet generator. The lubricant Lb flows out of the pipe 23 through the hole 21 and forms a meniscus 28 on the outer surface of the pipe 23. The meniscus 28 protrudes from the hole 21, spreads around the hole 21, and then spreads onto the outer surface of the pipe 23. It is difficult to generate droplets of the lubricant Lb directly below the hole 21. In contrast, the dripping apparatus 10 shown in FIG. 1 includes a droplet generator 12, and therefore can efficiently form droplets Dp.

[0015] The upper part of Fig. 3 is a perspective view of a dripping device 30 according to another example. The dripping device 30 includes a pipe 33. A plurality of holes 31 are provided along the extension direction of the pipe 33. Both ends of the pipe 33 are connected to the hose 14 via joints 36. The lubricant is supplied into the pipe 33 through the hose 14. One of the ends of the pipe 33 may be a terminal end without being connected to the hose 14. The lubricant Lb flows from inside the pipe 33 through the holes 31 to the outside of the pipe 33.

[0016] The dropping device 30 shown in the upper part of Fig. 3 includes a plurality of droplet generators 32. A droplet generator 32 is provided for each of the holes 31. The middle part of Fig. 3 is a partial perspective view of the droplet generators 32. The droplet generators 32 are grooves. These grooves start from each of the holes 31, go around the outer surface of the pipe 33, and return to the holes 31. The cross section of the grooves of the droplet generators 32 has a V-shape or other shape. Holes other than the holes 31 may be formed on the grooves of the droplet generators 32.

[0017] The lower part of Figure 3 is a cross-sectional view of the droplet generator 32. Lubricant Lb flowing out from inside the pipe 33 into the groove of the droplet generator 32 forms a meniscus 38 at the lower end of the droplet generator 32. The enlarged meniscus 38 turns into droplets Dp and falls down the pipe 33. The lubricant Lb flows along the groove of the droplet generator 32 and turns into droplets Dp at the lower end of the groove, that is, at a position facing the workpiece (not shown), and falls. In this way, the dripping device 30 drips droplets Dp of lubricant in a line.

[0018] The joint 36 shown in the upper part of Figure 3 rolls the pipe 33 around an axis parallel to the axis of the pipe 33. As the pipe 33 rolls, the position where the droplets fall on the groove of the droplet generator 32 changes. The droplet generator may become dirty if the lubricant adheres to the droplet generator. However, in this example, by changing the position where the droplets Dp start to fall, the droplet generator 32 can drop the droplets Dp from a clean part of the groove of the droplet generator 32.

[0019] The upper part of Fig. 4 is a partial perspective view of a dripping device 40 that is a modification of the dripping device 30 of Fig. 3. The dripping device 40 includes a pipe 43 and a droplet generator 42. The pipe 43 includes a hole 41 similar to the hole 31 shown in Fig. 3. The droplet generator 42 has a structure similar to the droplet generator 32 shown in Fig. 3. The difference is that the groove of the droplet generator 42 gradually narrows and widens as it goes around the outer surface of the pipe 43.

[0020] The middle section of Figure 4 is a cross-sectional view of the wide side of the groove of droplet generator 42. When the wide side of the groove of droplet generator 42 reaches the lower end of pipe 43, the lubricant forms a large meniscus 48. The large meniscus 48 also generates large droplets. The bottom section of Figure 4 is a cross-sectional view of the narrow side of the groove of droplet generator 42. When the narrow side of the groove of droplet generator 42 reaches the lower end of pipe 43, the lubricant forms a small meniscus 49. The small meniscus 49 also generates small droplets. By rolling the pipe 43 shown in the upper section of Figure 4 around an axis parallel to the axis of pipe 43, the width of the groove of droplet generator 42 at the lower end of pipe 43 can be arbitrarily changed. In this way, the size of the droplets formed by droplet generator 42 in dripping device 40 can be arbitrarily changed. [Explanation of symbols]

[0021] 10 dripping device, 11 hole, 12 droplet generator, 13 pipe, 14 hose, 15 workpiece, 16 joint, 17 coating film, 18 meniscus, 20 dripping device, 21 hole, 23 pipe, 28 meniscus, 30 dripping device, 31 hole, 32 droplet generator, 33 pipe, 36 joint, 38 meniscus, 40 dripping device, 41 hole, 42 droplet generator, 43 pipe, 48 meniscus, 49 meniscus, Dp droplet, Lb lubricant

Claims

[Claim 1] An apparatus for dripping lubricant onto the surface of a workpiece to be pressed, a pipe that is hung horizontally above the workpiece and has a plurality of holes formed along its extending direction; a droplet generator disposed in each of the holes for converting lubricant flowing from within the pipe through the holes into droplets; the droplet generator is a groove that starts at the hole, circles the outer surface of the pipe, and returns to the hole; The lubricant flows along the groove and falls as droplets at a position on the groove facing the workpiece, The pipe rolls to change the position where the droplet falls on the groove. A device for dripping lubricant.

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