Method for forming irregularly shaped grooves

Abstract

To provide a method for forming a deformed groove, which can easily form a deformed groove of a rectangular, triangular, or inclined shape on one surface of a metal plate and preventing sticking of a discharged thin fin to a tool.SOLUTION: A method for forming a deformed groove, which digs up one surface 1a of a metal plate 1 to form a groove by a blade part 5a of a digging-up tool 5, the blade part 5a having a rectangular cutter 5b, a triangular cutter 5c, an inclined cutter or the like projected at a tip, erects and forms a thin scrap fin 8 by repeating a digging-up step of digging up one surface 1a of the metal plate 1 with the digging-up tool 5 placed at a prescribed angle thereto, discharges the scrap fin 8 to form on the one surface 1a of the metal plate 1, a deformed groove such as a rectangular groove 2, a triangular groove, or an inclined groove.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a method for forming irregularly shaped grooves, such as rectangular, triangular, or inclined grooves, on one surface of a metal plate. [Background technology]

[0002] As a method for forming grooves on the surface of a metal plate, cutting processing using an end mill or a milling cutter is generally performed. These cutting processes depend on the shape of the cutting tool, and rectangular grooves are formed. Therefore, it is difficult to form grooves with a triangular shape or a slope. In addition, when forming deep grooves, it is difficult to form grooves with high precision because a large stress is applied to the metal plate or the tool, and there is a problem that the bottom part is deformed, especially in the case of a metal plate with a small bottom thickness of the groove.

[0003] As another method of cutting using such an end mill or milling cutter, a method described in Japanese Patent No. 5118389 (Patent Document 1) has been proposed. In the method shown in Patent Document 1, a cutting tool is used to dig into the workpiece to form thin cutting fins, which are then cut and removed by horizontal movement of the cutting tool. According to this method, since the cutting fins are formed thin, it is said that cutting can be performed with less stress on the workpiece.

[0004] [Patent Document 1] Patent No. 5118389 DISCLOSURE OF THEINVENTION [Problem to be solved by the invention]

[0005] The recess forming method disclosed in Patent Document 1 forms a thin cutting fin with the cutting tool blade, and then cuts it with the cutting tool and separates it from the workpiece, so that it is possible to reduce stress on the workpiece. However, the recess formed by the cutting tool is a wide rectangle, and it is not possible to form a triangular or inclined recess or groove. Furthermore, when the cutting fin is formed with the cutting tool blade, since the cutting fin is thin, the cutting fin sticks to the cutting tool due to the liquid such as cutting oil. For this reason, when the next cutting fin is cut, the cutting fin may stick to the cutting tool blade, which causes problems such as the next cutting fin not being cut or being deformed.

[0006] Therefore, an object of the present invention is to provide a method for forming irregularly shaped grooves that can easily form irregularly shaped grooves, such as rectangular, triangular, inclined, etc., on one side of a metal plate, and that can prevent the thin scrap fins discharged from sticking to the tool. [Means for solving the problem]

[0007] In order to solve the above problems, the method for forming irregularly shaped grooves according to the invention of claim 1 is a method for forming irregularly shaped grooves on one side of a metal plate by a blade portion of an excavation tool, the blade portion of the excavation tool has a plurality of blades such as rectangular blades, triangular blades, and inclined blades protruding from a tip end thereof, a pressing block is integrally provided on the forward moving side of the excavation tool, and the excavation tool is pressed against one side of the metal plate. In contrast At a given angle Move forward and get closer After a scrap fin is formed upright, the digging tool is moved horizontally in the forward direction to half-cut the base of the scrap fin, and when the next scrap fin is formed upright by advancing the digging tool, the previously formed scrap fin is pressed by the pressing block, and the half-cut base is cut and discharged. Effect of the Invention

[0009] According to the method for forming irregular grooves of the present invention, a groove having an irregular shape such as a rectangular shape, a triangular shape, or an inclined shape can be easily formed in a metal plate by digging up one side of the metal plate with a digging tool having a triangular, inclined, or other blade at the tip, forming and discharging scrap fins. At this time, since a thin scrap fin can be formed by the blade of the digging tool, even if the groove has an irregular shape, stress on the metal plate can be minimized. In addition, even if the cutting is performed deeply by the blade of the digging tool, since the scrap fin is thin, a deep irregular groove can be formed with little stress. In particular, even if the thickness of the bottom surface of the groove is reduced, the stress due to cutting is small, so warping of the metal plate can be minimized. Moreover, since the stress on the blade is eliminated, it is possible to extend the life of the digging tool.

[0010] In addition, the scrap fin is formed upright by the digging tool, and the base is half-cut. The scrap fin is pressed in the moving direction by a pressing block provided on the forward side of the digging tool, and the half-cut base is cut and discharged. Therefore, the scrap fin can be separated from the blade of the digging tool. scrap This can prevent the fins from sticking to the cutting tool. [Brief description of the drawings]

[0011] [Figure 1] FIG. 2 is a perspective view showing a state in which a groove having a different shape is formed according to the present invention. [Diagram 2] FIG. 11 is a perspective view showing a metal plate in which an irregularly shaped groove is formed. [Diagram 3] FIG. 13 is a front view showing a digging tool and a metal plate for forming an irregularly shaped groove. [Figure 4] 13(A) and (B) are front views showing an excavation tool and a metal plate for forming another irregularly shaped groove. [Diagram 5] 1A to 1G are process explanatory views showing the process of forming irregular shaped grooves. BEST MODE FOR CARRYING OUT THEINVENTION

[0012] The method for forming irregular grooves according to the present invention is a method for forming irregular grooves on one side of a metal plate by a blade portion of an excavation tool, the blade portion of the excavation tool has a plurality of blades such as rectangular blades, triangular blades, and inclined blades protruding from a tip end thereof, a pressing block is integrally provided on the forward moving side of the excavation tool, and the excavation tool is pressed against one side of the metal plate. In contrast At a given angle Move forward and get closer After the scrap fin is formed upright, the digging tool is moved horizontally in the forward direction to half-cut the base of the scrap fin, and when the next scrap fin is formed upright by advancing the digging tool, the pressing block presses the scrap fin formed beforehand, and the half-cut base is cut and discharged.

[0013] The irregular shaped groove forming method according to the present invention will be described below with reference to the drawings. Fig. 1 shows the state in which an irregular shaped groove is formed by the irregular shaped groove forming method according to the present invention. The metal plate 1 is a machinable metal, and is selected from copper, iron, aluminum, stainless steel, or an alloy made of multiple metals.

[0014] 1 and 2, a plurality of irregularly shaped grooves, such as rectangular grooves 2 and triangular grooves 3, are formed on one surface 1a of a metal plate 1. The rectangular grooves 2 have a variety of different groove shapes, such as narrow grooves, wide grooves, shallow grooves, and deep grooves. The deep grooves have a plate thickness at the bottom that is approximately one-third to one-fifth of the plate thickness of the metal plate 1.

[0015] 3, the excavation tool 5 has a rectangular blade 5b for forming the rectangular groove 2 and a triangular blade 5c for forming the triangular groove 3, which protrude from the tip of the blade portion 5a. The rectangular groove 2 has different blade widths and protruding dimensions corresponding to the groove shape, such as a narrow groove, a wide groove, a shallow groove, or a deep groove.

[0016] 4(A) and (B) show modified examples of the excavation tool, which are formed in a different shape from the blade portion 5a shown in FIG. 3. The excavation tool 10 shown in FIG. 4(A) is formed with a rectangular blade 10a for forming various rectangular grooves 11 of different depths in the metal plate 2. The excavation tool 12 shown in FIG. 4(B) is formed with an inclined blade 12a for forming a plurality of inclined surfaces 13 with different inclination angles in addition to the rectangular grooves 11. In this way, by forming the shape of the blade portion of the excavation tool into an arbitrary shape, an irregularly shaped groove of an arbitrary shape can be formed.

[0017] Next, a method for forming the irregularly shaped groove shown in Fig. 2 will be described with reference to Fig. 5. As shown in Fig. 5, the excavation tool 5 is attached to a moving part 4 attached to a driving device (not shown), and moves back and forth together with the moving part 4 at a predetermined angle of 5 degrees to 20 degrees with respect to one surface 1a of the metal plate 1. A blade part 5a is formed on the tip side of the excavation tool 5 in the moving direction (toward the right side in the figure). The width of this blade part 5a is set to the horizontal width for forming the irregularly shaped grooves 2 and 3, as shown in Fig. 3.

[0018] The moving part 4 holds a fin raising block 6 integrally with the excavation tool 5. The fin raising block 6 is provided with a pressing plate 7 in a direction perpendicular to the direction of movement of the moving part 4. The width of the pressing plate 7 is approximately the same as the width of the scrap fin 8 described later. The lower end of the pressing plate 7 is dimensioned so that it can exceed the top of the scrap fin 8 when the moving part 4 retreats. Furthermore, the moving part 4 excavates and forms the scrap fin 8, and moves horizontally with respect to one side 1a of the metal plate 1 when the blade part 5a of the excavation tool 5 reaches almost the lowest point. The horizontal movement dimension of the excavation tool 5 is set to about one half to one third of the plate thickness of the heat dissipation fin 3a to be formed upright.

[0019] The device for forming irregular grooves thus configured has a fin forming mode in which scrap fins 8 are formed upright, and a half-cut mode in which scrap fins 8 are cut by half-cutting. First, in the fin forming mode, as shown in FIG. 5(A), in the initial state, the blade portion 5a of the digging tool 5 is positioned away from one surface 1a of the metal plate 1. From this state, as shown in FIG. 5(B), the digging tool 5 is moved forward by the moving part 4 in the direction of the arrow at a predetermined angle, and the blade portion 5a is brought into contact with a position where the digging allowance is obtained. Thereafter, the digging tool 5 is moved forward while maintaining the inclination angle, so that the metal plate 1 is dug up and the scrap fins 8 are gradually formed upright. When the digging tool 5 is further moved, the blade portion 5a of the digging tool 5 reaches a predetermined depth, and the inclined scrap fins 8 of a predetermined height are formed upright.

[0020] From this state, the mode is subsequently changed to the half-cut mode. In the half-cut mode, as shown in FIG. 5(C), the excavation tool 5 is retracted in the direction indicated by the arrow, and the blade portion 5a is raised to a cut line CL above the bottom surface 1b. Then, as shown in FIG. 5(D), the moving portion 5 moves the excavation tool 5 in a direction parallel to one surface 1a of the metal plate 1, and the base of the scrap fin 8 is half-cut to form a half-cut portion 8a. The dimension by which the blade portion 5a of the excavation tool 5 is moved to form this half-cut portion 8a is set to about one-half to two-thirds of the plate thickness of the scrap fin 8, and is set to a moving dimension that does not cut the scrap fin 8.

[0021] Thereafter, as shown in Fig. 5(E), the excavation tool 5 is retreated to a position for forming the next scrap fin 8, and returns to the initial state shown in Fig. 5(A). When the excavation tool 5 is retreated, if the tip of the presser plate 7 of the fin raising block 6 comes into contact with the upper end of the scrap fin 8 that has been previously formed upright, the presser plate 7 may be configured to rise, and the presser plate 7 may be raised while being in sliding contact with the scrap fin 8, and retreated so as to climb over the scrap fin 8. Alternatively, if the presser plate 7 is fixed, the elasticity of the scrap fin 8 may be utilized, and the presser plate 7 may be bent in the retreating direction by the pressure of the presser plate 7, and retreated so as to climb over the tip of the scrap fin 8.

[0022] Then, after returning to the initial state shown in FIG. 5(A), the mode shifts again to the fin formation mode as shown in FIG. 5(F), and the excavation tool 5 is moved by the moving part 4 in the direction of the arrow at a predetermined angle, so that the next scrap fin 8 is gradually formed upright. At this time, the pressing plate 7 arranged on the fin raising block 6 moves together with the excavation tool 5 as shown in FIG. 5(F), and presses the scrap fin 8 formed beforehand. Since the half-cut part 8a is formed at the base of this scrap fin 8 in the previous cutting mode, the scrap fin 8 is cut from the cut line CL by a slight pressing force of the pressing plate 7 and is separated from the metal plate 1 as shown in FIG. 5(G). At this time, the scrap fin 8 is discharged by the pressing force of the pressing plate 7 and separated from the excavation tool 5, so that the thin scrap fin 8 sticks to the excavation tool 5 by the liquid such as cutting oil, and the problem of the next scrap fin 8 being hindered from being formed upright is prevented in advance.

[0023] In this way, the tip of the blade portion 5a of the digging tool 5 is formed into an irregular shape as shown in Fig. 1, since the rectangular blade 5b for forming the rectangular groove 2 and the triangular blade 5c for forming the triangular groove 3 are formed to protrude. In addition, the plate thickness of the scrap fin 8 is formed to be thin, about 0.02 mm to 0.5 mm. Therefore, since the stress applied to the metal plate 1 is minimized when forming the scrap fin 8, warping of the metal plate can be minimized even if the irregular groove is made deep and the thickness of the bottom surface is reduced.

[0024] Thereafter, the above-mentioned fin forming mode for forming the scrap fins 8 upright, the half-cut mode for cutting the scrap fins 8 in half, and the process for pressing the scrap fins 8 with the pressing plate 7 to remove them from the metal plate 1 are repeated. As a result, irregularly shaped grooves consisting of a rectangular groove 2 and a triangular groove 3 are formed on one surface 1a of the metal plate 1.

[0025] Although the present invention has been specifically described based on the embodiments, the present invention is not limited to the above embodiments and can be modified in various ways without departing from the scope of the present invention. For example, although flanges are formed on both sides of the metal plate, grooves of irregular shapes may be formed from the edges of the metal plate. Furthermore, the scrap fins detached from the metal plate may be blown away by compressed air in a direction away from the blade of the excavation tool. [Explanation of symbols]

[0026] 1 metal plate 1a One side 2 rectangular groove 3 Triangular groove 5. Digging tools 5a Blade 6 Fin lifting block 7 Pressure plate 8. Scrap Fin 8a Half cut part

Claims

[Claim 1] A method for forming a groove having an irregular shape on one side of a metal plate by a blade portion of an excavation tool, comprising: A plurality of blades such as a rectangular blade, a triangular blade, an inclined blade, etc. are formed protruding from the tip of the blade portion of the excavation tool, A pressing block is integrally provided on the forward movement side of the digging tool, A method for forming an irregularly shaped groove, in which the digging tool is advanced at a predetermined angle to one side of a metal plate to form a thin scrap fin upright, the digging tool is then moved horizontally in the forward direction to half-cut the base of the scrap fin, and when the digging tool is advanced to form the next scrap fin upright, the previously formed scrap fin is pressed by the pressing block, and the half-cut base is cut and discharged.

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