Lubricant spray device

Abstract

To provide a lubricant spray device which can form a lubrication film onto a metal mold more uniformly.SOLUTION: A lubricant spray device 100 comprises a nozzle tip 140 for spraying a lubricant to a metal mold. The nozzle tip 140 comprises a slit 145 for injecting the lubricant at a tip 144, and the slit 145 comprises a wide part 146, in which a slit width becomes wider as approaching the tip, on at least a tip side. The lubricant spray device can form a lubrication film onto the metal mold more uniformly.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a lubricant spray device. [Background technology]

[0002] Patent Document 1 describes a release agent application device that sprays and applies a release agent to the forging surface of a die used in forging. Specifically, in Patent Document 1, a release agent spray header is placed on the lower die and upper die that are opened after forming, and the release agent is sprayed from each nozzle toward the corresponding parts of the lower die and upper die. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2010-207872 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in a large die such as the forging die of Patent Document 1, the area over which the lubricating coating is to be formed is relatively wide, which poses the problem that it is difficult to form a uniform lubricating coating.

[0005] The present invention has been made to solve such problems, and has an object to provide a lubricant spraying device that can form a more uniform lubricant coating on a die. [Means for solving the problem]

[0006] A lubricant spraying device according to a first aspect of the present invention includes a nozzle tip for spraying lubricant onto a mold, the nozzle tip having a slit at a tip portion for spraying the lubricant, and the slit having a wide portion, at least on the tip side, in which the slit width becomes wider toward the tip. Effect of the Invention

[0007] According to the lubricant spraying device of the first aspect of the present invention, the wide portion of the slit can widen the spray angle of the lubricant, thereby providing a lubricant spraying device capable of forming a more uniform lubricant coating on the die. [Brief description of the drawings]

[0008] [Figure 1] 1 is a cross-sectional view showing a simplified example of the configuration of a lubricant spray device according to a first embodiment of the present invention. [Diagram 2] 1 is a perspective view including a bottom surface showing an example of a nozzle tip according to a first embodiment of the present invention. [Diagram 3] 1 is a perspective view including a top surface showing an example of a nozzle tip according to a first embodiment of the present invention. [Figure 4] 1 is a perspective view including a cross section showing an example of a nozzle tip according to a first embodiment of the present invention. [Diagram 5] 1 is a side view showing an example of a nozzle tip according to Example 1 of Embodiment 1 of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] First embodiment Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. However, the present invention is not limited to the following first embodiment. In addition, the following description and drawings are appropriately simplified for clarity of explanation.

[0010] Fig. 1 is a diagram showing an example of the configuration of a lubricant spraying device 100 according to the present embodiment 1. As shown in Fig. 1, the lubricant spraying device 100 includes a lubricant supply path 110, an inert gas supply path 120, a lubricant hand 130, and a nozzle tip 140. The lubricant spraying device 100 sprays lubricant onto a die from the nozzle tip 140 to form a lubricant coating on a desired surface of the die. In particular, since the forging die for forming vehicle parts has a relatively large shape, the area in which the lubricant film needs to be formed is also large. It has been difficult to uniformly form the lubricant film over such a large area. In addition, when strength needs to be ensured as in the case of vehicle parts, the die temperature is, for example, 280°C, which is higher than the general die temperature (150°C to 200°C), and this causes the Leidenfrost phenomenon, which makes it difficult for the lubricant to adhere to the die. However, as described later, by providing the nozzle tip 140 according to this embodiment, it is possible to provide a lubricant spraying device 100 that can form a lubricant film more uniformly on the die. The lubricant spraying device 100 according to this embodiment 1 will be described in detail below.

[0011] The lubricant supply path 110 supplies the lubricant to the lubricant hand 130 from a lubricant tank (not shown) in which the lubricant is stored.

[0012] The inert gas supply passage 120 supplies an inert gas from an inert gas generator (not shown) to the lubricating hand 130 .

[0013] The lubrication hand 130 includes a first flow path 131 communicating with the lubricant supply path 110 and a second flow path 132 communicating with the inert gas supply path 120. The first flow path 131 and the second flow path 132 are arranged opposite to each other and communicate with each other. The lubrication hand 130 also includes a third flow path 133 arranged to intersect with the first flow path 131 and the second flow path 132. The third flow path 133 also communicates with the first flow path 131 and the second flow path 132. Therefore, the lubricant supplied through the first flow path 131 and the inert gas supplied through the second flow path are mixed at the connection portion between the first flow path 131 and the second flow path 132, and the mixed lubricant and inert gas flow into the third flow path 133.

[0014] 2 to 4 show a perspective view including a lower surface of the nozzle tip 140, a perspective view including a top surface, and a perspective view including a cross section, respectively. FIG. 4 is a perspective view showing a state in which the nozzle tip 140 is cut at the position of a slit 145 (described later) of the nozzle tip 140 along a plane parallel to the axial direction of the slit 145 and the nozzle tip 140. As shown in FIGS. 2 to 4, the nozzle tip 140 has a cylindrical shape in which a nozzle flow passage 141 communicating with the third flow passage 133 of the lubrication hand 130 is formed inside. Therefore, the lubricant mixed with the inert gas that flows into the third flow passage 133 of the lubrication hand 130 flows into the nozzle flow passage 141. As shown in FIGS. 2 to 4, the nozzle tip 140 according to this embodiment has a substantially cylindrical shape, but is not limited thereto, and may be an elliptical cylindrical shape, a square cylindrical shape, or the like. The nozzle tip 140 also includes a base portion 142, a central portion 143, and a tip portion 144.

[0015] The base 142 has a ring shape and is connected to a specified connecting portion (not shown) of the lubrication hand 130 so that, when the nozzle tip 140 is attached to the lubrication hand 130, the third flow path 133 of the lubrication hand 130 and the nozzle flow path 141 of the nozzle tip 140 are connected to each other.

[0016] The central portion 143 has a cylindrical shape with a width (diameter) smaller than that of the base portion 142, and has the nozzle flow path 141 formed therein. The width (diameter) of the nozzle flow path 141 is substantially equal to the width (diameter) of the third flow path 133.

[0017] Tip portion 144 is located on the tip side of central portion 143, i.e., on the opposite side of central portion 143 from base portion 142. Tip portion 144 has a generally dome shape whose outer shape becomes smaller toward the tip. That is, the width (diameter) of the outer shape of tip portion 144 gradually becomes smaller toward the tip from a length equal to the width (diameter) of the outer shape of central portion 143.

[0018] Further, the tip portion 144 has a slit 145 in the center thereof, which is parallel to the diameter of the outer shape of the central portion 143. The slit 145 communicates with the nozzle flow passage 141 and connects the nozzle flow passage 141 to the outside of the nozzle tip 140. That is, the lubricant mixed with the inert gas that flows into the nozzle flow passage 141 passes through the slit 145 and is sprayed to the outside of the nozzle tip 140. The slit 145 has a length that covers the entire outer diameter of the central portion 143. Therefore, the tip portion 144 is divided into two parts by the slit 145. The length of the slit 145 is not limited to this, and may be any length that is longer than the diameter of the nozzle flow passage 141.

[0019] Further, the slit 145 has a wide portion 146 at its tip end where the slit width of the slit 145 becomes wider toward the tip end. This makes it possible to widen the spray angle of the lubricant sprayed by the slit 145.

[0020] The axial length of wide portion 146 of nozzle tip 140 (hereinafter referred to as the "depth"), the opening angle of wide portion 146, and the width of slit 145 can be determined based on the type of lubricant, the size of the desired area to which the lubricant is to be applied on the mold, etc.

[0021] Example 1 Fig. 5 shows Example 1 of nozzle tip 140 according to the present embodiment 1. As shown in Fig. 5, it is preferable that the opening angle θ of wide portion 146 is 40° or more. It is also preferable that the depth D1 of wide portion 146 is 40% or more of the depth D2 of slit 145. It is also preferable that the width W1 of slit 145 is 25% or more of the diameter W2 of nozzle flow channel 141.

[0022] According to the lubricant spraying device 100 of the first embodiment described above, the spray angle of the lubricant can be made wider by the wide portion 146 of the slit 145. Therefore, it is possible to provide the lubricant spraying device 100 that can form a more uniform lubricant coating on the die.

[0023] In particular, since the configuration of a typical two-fluid type lubricant spray device is not changed, and the nozzle tip attached to the lubrication hand 130 is simply changed to the nozzle tip 140 of this embodiment 1, it is possible to reduce costs and improve the formation of the lubricant coating.

[0024] In addition, the opening angle of the wide portion 146 of the slit 145 is 40° or more, which more reliably widens the spray angle of the lubricant sprayed by the slit 145. This makes it possible to form a lubricating coating more uniformly over a wider area.

[0025] In addition, since the depth D1 of the wide portion 146 is 40% or more of the depth D2 of the slit 145, it is possible to more reliably widen the spray angle of the lubricant sprayed by the slit 145. This makes it possible to form a lubricating coating more uniformly over a wider area.

[0026] Furthermore, since the width W1 of the slit 145 is 25% or more of the width (diameter) W2 of the nozzle flow path 141, it is possible to more reliably widen the spray angle of the lubricant sprayed by the slit 145. This makes it possible to form a lubricating coating more uniformly over a wider range.

[0027] The present invention is not limited to the above-described embodiment, and can be modified as appropriate without departing from the spirit and scope of the present invention. [Explanation of symbols]

[0028] 100 Lubricant spray device 110 Lubricant supply passage 120 Inert gas supply line 130 Lubricating Hand 131 First Channel 132 Second Channel 133 Third Stream 140 Nozzle Tip 141 Nozzle flow path 142 Base 143 Central part 144 Tip 145 Slit 146 Wide section

Claims

1. A die manufacturing method comprising: a lubricant supply passage; an inert gas supply passage; a lubrication hand; and a nozzle tip that sprays a lubricant onto a die; the lubricant supply passage supplies the lubricant to the lubricating hand, The inert gas supply passage supplies an inert gas to the lubricating hand, the lubrication hand includes a first flow path communicating with the lubricant supply path, a second flow path communicating with the inert gas supply path and disposed opposite the first flow path, and a third flow path disposed intersecting the first flow path and the second flow path and extending from a connection portion between the first flow path and the second flow path toward the nozzle tip, the nozzle tip comprises a base portion, a center portion, and a tip portion; The base portion has a ring shape and is connected to the lubrication hand. the central portion has a cylindrical shape with a nozzle flow passage formed therein, and the nozzle flow passage communicates with the third flow passage by connecting the base portion to the lubrication hand; The tip portion is The tip has a dome shape, and the diameter of the tip gradually decreases from a length equal to the diameter of the central portion toward the tip, a slit for injecting the lubricant that is mixed with an inert gas at the connecting portion between the first flow path and the second flow path and is supplied from the third flow path to the nozzle flow path; the slit is in communication with the nozzle flow passage, is parallel to a diameter of the central portion, and has a length that spans the entire diameter of the central portion; the width of the slit is 25% or more of the width of the nozzle flow channel, The slit has a wide portion at least on the tip side, the slit width of which increases toward the tip. Lubricant spray device.

2. The opening angle of the wide portion of the slit is 40° or more.

2. The lubricant spray device of claim 1.

3. The depth of the wide portion is 40% or more of the depth of the slit.

3. A lubricant spraying device according to claim 1 or 2.

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