Foreign matter removal tap

Abstract

To solve the problems that if misalignment occurs in the position or angle through which a foreign matter removal tap is inserted, foreign matter is not removed sufficiently, to disable the female thread from fully functioning, and that damage to the female thread occurs to damage the female thread surface.SOLUTION: There is provided a foreign matter removal tap for removing foreign matter adhering to a female screw surface. The foreign matter removal tap comprises a taper screw section and a female screw engagement section. The taper screw section has a spiral groove portion in part or in entirety thereof. A taper angle of the taper screw section is preferably 2 to 75 degrees. A length in a tap center axis direction of the female screw engagement section is preferably 0.10 to 10.0 with respect to a diameter of the female screw. A diameter of the female screw engagement section is preferably 0.80 to 1.00 with respect to the diameter of the female screw.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a tap for removing foreign matter adhering to a female thread portion. [Background technology]

[0002] When drilling a screw hole in a metal material, a resin material, or the like, a pilot hole is drilled in the object, and then a female screw is formed using a tap. When a surface treatment such as painting is required for a metal material, painting is usually performed after the female screw is formed, and paint adheres to the thread surface of the female screw. In addition, chips, powder, liquid, and the like may adhere to the female screw after the female screw is formed. Therefore, it is necessary to remove foreign matter before using the female screw as a female screw.

[0003] Patent Document 1 discloses a method for removing paint from a female thread. The invention described in Patent Document 1 removes the coating film formed on the female thread by inserting a paint removal tap into the female thread while rotating it. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2007-44575 A Summary of the Invention [Problem to be solved by the invention]

[0005] Foreign matter adhering to the female thread is removed by inserting a foreign matter removal tap precisely into the female thread, which is designed to mesh with the formed female thread, and cutting the foreign matter away. However, if the insertion position or angle of the foreign matter removal tap is misaligned, the foreign matter is not sufficiently removed, and the female thread cannot fully function. There is also the problem that the female thread is damaged, resulting in damage to the female thread surface. Therefore, the foreign body removal tap must be accurately inserted into the female thread, and this must be done manually by a skilled worker. [Means for solving the problem]

[0006] The present inventors have conducted intensive research to solve the above problems and have developed a foreign body removal tap that allows easy adjustment of the position and angle of insertion into a female thread.

[0007] The present invention has been made to solve the above problems, and provides the following [1] to

[16] . [1] A foreign matter removal tap for removing foreign matter adhering to a female thread surface, the foreign matter removal tap having a tapered thread portion and a female thread engagement portion, the tapered thread portion having a spiral groove portion in part or all of it. [2] The foreign body removal tap according to [1], wherein the tapered thread portion has a taper angle of 2 to 75 degrees. [3] The foreign body removal tap according to [1] or [2], wherein the length of the female thread engagement portion in the tap central axis direction is 0.10 to 10.0 times the diameter of the female thread. [4] The foreign matter removal tap according to [1] or [2], wherein the diameter of the female thread engagement portion is 0.80 to 1.00 times the diameter of the female thread. [5] A tip guide portion that is partially or entirely tapered, The foreign body removal tap according to [1] or [2], wherein the tapered thread portion has one end connected to the tip guide portion and the other end connected to the female thread engagement portion.

[0008] [6] The foreign body removal tap according to [1], wherein the length of the female thread engagement portion in the tap central axis direction is 0.10 to 10.0 times the diameter of the female thread. [7] The foreign matter removal tap according to [1], wherein the diameter of the female thread engagement portion is 0.80 to 1.00 times the diameter of the female thread. [8] A tip guide portion that is partially or entirely tapered, The foreign body removal tap according to [1], wherein the tapered thread portion has one end connected to the tip guide portion and the other end connected to the female thread engagement portion.

[0009] [9] The foreign body removal tap according to [1], wherein the length of the female thread engagement portion in the tap central axis direction is 0.10 to 10.0 relative to the diameter of the female thread, and the diameter of the female thread engagement portion is 0.80 to 1.00 relative to the diameter of the female thread.

[10] The foreign body removal tap according to [1], wherein the length of the female thread engagement portion in the tap central axis direction is 0.10 to 10.0 relative to the diameter of the female thread, and the taper has a tip guide portion that is tapered in part or in whole, and the tapered thread portion has one end connected to the tip guide portion and the other end connected to the female thread engagement portion.

[11] The foreign body removal tap according to [1], wherein the diameter of the female thread engagement portion is 0.80 to 1.00 times the diameter of the female thread, and the taper thread portion has a tip guide portion that is tapered in part or in whole, and one end of the tapered thread portion is connected to the tip guide portion and the other end of the tapered thread portion is connected to the female thread engagement portion.

[0010]

[12] The foreign body removal tap according to [1], wherein the diameter of a tip end of the tapered thread portion is 0.30 to 0.90 times the diameter of a base end of the tapered thread portion, the length of the female thread engagement portion in the tap central axis direction is 0.10 to 10.0 times the diameter of the female thread, and the diameter of the female thread engagement portion is 0.80 to 1.00 times the diameter of the female thread.

[13] The foreign body removal tap according to [1], wherein the diameter of a tip end of the tapered thread portion is 0.30 to 0.90 times the diameter of a base end of the tapered thread portion, the length of the female thread engagement portion in the tap central axis direction is 0.10 to 10.0 times the diameter of the female thread, and the taper has a tip guide portion that is tapered in part or in whole, and the tapered thread portion has one end connected to the tip guide portion and the other end connected to the female thread engagement portion.

[14] The foreign body removal tap according to [1], wherein the diameter of the tip end of the tapered thread portion is 0.30 to 0.90 times the diameter of the base end of the tapered thread portion, the diameter of the female thread engagement portion is 0.80 to 1.00 times the diameter of the female thread, and the taper thread portion has a tip guide portion that is tapered in part or in whole, and one end of the tapered thread portion is connected to the tip guide portion and the other end is connected to the female thread engagement portion.

[15] The foreign body removal tap according to [1], wherein the length of the female thread engaging portion in the tap central axis direction is 0.10 to 10.0 relative to the diameter of the female thread, the diameter of the female thread engaging portion is 0.80 to 1.00 relative to the diameter of the female thread, and the taper has a tip guide portion that is tapered in part or in whole, and the tapered thread portion has one end connected to the tip guide portion and the other end connected to the female thread engaging portion.

[0011]

[16] The foreign body removal tap according to [1], wherein the diameter of a tip end of the tapered thread portion is 0.30 to 0.90 times the diameter of a base end of the tapered thread portion, the length of the female thread engagement portion in the tap central axis direction is 0.10 to 10.0 times the diameter of the female thread, and the diameter of the female thread engagement portion is 0.80 to 1.00 times the diameter of the female thread, and the taper has a tip guide portion that is tapered in part or in whole, and the tapered thread portion has one end connected to the tip guide portion and the other end connected to the female thread engagement portion. Effect of the Invention

[0012] According to the present invention, even if the insertion position or angle of the foreign matter removal tap is misaligned, foreign matter can be sufficiently removed and damage to the female thread can be suppressed. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a front view of a foreign body removal tap according to a first embodiment. [Diagram 2] FIG. 2 is a partially enlarged view showing the foreign matter removal tap of FIG. 1 in use. [Diagram 3] FIG. 3 is a partial enlarged view showing the foreign matter removal tap of FIG. 1 in use. [Figure 4] FIG. 4 is a partially enlarged view showing the foreign matter removal tap of FIG. 1 in use. [Diagram 5] FIG. 5 is a partial enlarged view showing the foreign matter removal tap of FIG. 1 in use. [Figure 6] FIG. 11 is a front view of a foreign body removal tap according to a second embodiment of the present invention. [Figure 7]FIG. 11 is a front view of a foreign body removal tap according to a third embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, the foreign matter removal tap of the present invention will be described with reference to the drawings as necessary. Note that the present invention is not limited to each embodiment.

[0015] (Embodiment 1) The foreign body removal tap 1 shown in Figure 1 is a foreign body removal tap for removing foreign body 13 adhering to the surface of a female thread 12, and has a tapered thread portion 2 and a female thread engagement portion 3, and the tapered thread portion 2 has a spiral groove portion 5 in part or all of it.

[0016] (Tapered thread) The tapered thread portion 2 is tapered and is formed so that the diameter becomes smaller from the base end to the tip end. The tapered thread portion 2 can be, for example, a linear taper, an exponential taper, a parabolic taper, or the like. The tapered thread portion has a taper angle of preferably 2 to 75 degrees, more preferably 4 to 60 degrees, and particularly preferably 6 to 30 degrees. Since the foreign matter 13 adheres to the female thread 12, a male thread of a corresponding standard cannot be inserted, and the diameter and surface shape are not uniform. If the taper angle of the tapered thread portion 2 is within the above range, it can be easily inserted into the female thread 12.

[0017] The diameter of the base end of the tapered thread portion 2 is the same as the diameter of the female thread engagement portion 3. The tapered thread portion 2 and the female thread engagement portion 3 are smoothly connected.

[0018] The tapered thread portion 2 has a spiral groove portion 5 in part or in whole. The groove portion 5 may have the same shape as a male screw, for example. As shown in Figures 2 and 3, if the central axis 9 of the tap 1 and the central axis 19 of the female thread 12 are misaligned, the tap 1 cannot be inserted into the female thread 12 at the correct position and angle. When the tap 1 is inserted into the female thread 12 while rotating, the groove portion 5 engages with the groove of the female thread 12, and the tap 1 is inserted along the groove of the female thread 12. This makes it possible to correct the misalignment of the insertion position and the insertion angle of the tap 1 to the correct ones. In addition, by accurately engaging the female thread engagement portion 3 with the groove of the female thread 12, the function of removing foreign matter attached to the surface of the female thread 12 is fully exerted, and the thread surface of the female thread 12 is not damaged. Furthermore, when the tap 1 is inserted into the female thread 12 while being rotated, the groove portion 5 engages with the groove of the female thread 12 and can remove foreign matter adhering to the surface of the female thread 12.

[0019] The length L2 of the tapered thread portion 2 in the tap central axis direction is preferably 0.10 to 10.00, and more preferably 0.50 to 1.50, relative to the length L1 of the female thread engagement portion 3 in the tap central axis direction. If the length L2 of the tapered thread portion 2 in the tap central axis direction is within the above range, the position and angle correction function can be exhibited while ensuring the foreign matter removal ability.

[0020] The length L1 of the female thread engaging portion 3 in the tap central axis direction is preferably 0.10 to 10.00, more preferably 0.50 to 1.50, and particularly preferably 0.80 to 1.20, relative to the diameter A1 of the female thread engaging portion 3 of the foreign matter removal tap 1. If it is smaller than the above range, the effective engaging portion with the female thread engaging portion 3 is insufficient, and the foreign matter removal function cannot be sufficiently exhibited. If it is larger than the above range, the overall length of the tap 1 becomes long, which is undesirable as it reduces the space required for use.

[0021] (Female thread engagement part) The female thread engaging portion 3 is a spiral groove provided to engage with the threaded surface of the female thread 12. The female thread engaging portion 3 is, for example, a groove having the same shape as the tap surface used to tap the female thread 12, but with a smaller diameter.

[0022] It is preferable that a part or all of the tapered thread portion 2 has a cut surface. It is also preferable that a part or all of the female thread engagement portion 3 has a cut surface. Thereby, when the tap 1 is inserted into the female thread 12 while rotating, foreign matter existing between the tap 1 and the female thread 12 can be cut or the like, and the foreign matter can be removed mainly by physical action. The cutting surface may have any shape that can engage with the female thread, and may be spiral, or may have a groove, blade, hole, claw, or other shape.

[0023] The diameter A1 of the female thread engagement portion 3 is preferably 0.80 to 1.00, more preferably 0.85 to 1.00, even more preferably 0.90 to 1.00, and particularly preferably 1.00, relative to the diameter A2 of the female thread 12. Since the foreign matter 13 adheres to the surface of the female thread 12, it is preferable that the diameter A1 of the female thread engagement portion 3 is the same as or smaller than the diameter A2 of the female thread 12. Moreover, by setting the ratio to 0.80 or more, the female thread engagement portion 3 can be made large enough to remove foreign matter on the surface of the female thread 12. The length of the female thread engaging portion 3 in the tap central axis direction is preferably 0.10 to 10.0, more preferably 0.15 to 1.80, and particularly preferably 0.30 to 1.50 relative to the diameter A2 of the female thread 12. By setting the length of the female thread engaging portion 3 in the tap central axis direction within the above range, the tap 1 can be made to an appropriate size according to the female thread 12.

[0024] The foreign body removal tap 1 has a tip guide portion 4, and the tapered thread portion 2 is connected at one end to the tip guide portion 4 and at the other end to the female thread engagement portion 3. The tip guide portion 4 has an adjust portion 4A, a guide portion 4B, and a gap portion 4C. By providing the tip guide portion 4, the tap 1 can be smoothly inserted into the female screw.

[0025] (Embodiment 2) The foreign matter removal tap 101 does not have the above-mentioned guide portion 4 B. It is possible to sufficiently ensure the correction function for the insertion position and insertion angle of the tap while simplifying the structure of the tap.

[0026] (Embodiment 3) The foreign body removal tap 201 does not have a tip guide portion 4. The structure of the tap can be simplified while still ensuring sufficient correction of the insertion position and insertion angle of the tap.

[0027] The workpiece 11 is provided with the female thread 12. The foreign matter 13 is, for example, metal pieces, metal debris, resin pieces, resin debris, coating film, liquid, etc., and may adhere to the surface of the workpiece 11 other than the female thread 12. [Industrial Applicability]

[0028] According to the present invention, even if the insertion position or angle of the foreign matter removal tap is misaligned, foreign matter can be sufficiently removed and damage to the female thread can be suppressed, making it industrially useful. [Explanation of symbols]

[0029] 1 Foreign object removal tap 2 Tapered thread 3 Female thread engagement part 4 Tip guide 9 Tap center axis 11 Workpiece 12 Female thread 13 Foreign object 19 Female thread central axis 101 Foreign object removal tap 201 Foreign object removal tap

Claims

1. A foreign matter removal tap for removing foreign matter adhering to a female thread surface, A tapered thread portion and a female thread engagement portion are provided. The tapered thread portion has a spiral groove in part or in its entirety for removing foreign matter.

2. 2. The foreign matter removal tap according to claim 1, wherein the tapered thread portion has a taper angle of 2 to 75 degrees.

3. 3. The foreign matter removal tap according to claim 1, wherein the length of said female thread engaging portion in the tap central axis direction is 0.10 to 10.0 times the diameter of said female thread.

4. 3. The foreign matter removal tap according to claim 1, wherein the diameter of the female thread engagement portion is 0.80 to 1.00 times the diameter of the female thread.

5. A tip guide portion is partially or entirely tapered, 3. The foreign matter removal tap according to claim 1, wherein said tapered thread portion has one end connected to said tip guide portion and the other end connected to said female thread engaging portion.

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