JP2015174107A - Manufacturing method of female screw nut, and female screw nut manufactured by method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method of a female screw nut manufacturable comparatively simply, and capable of securing accuracy of a female screw of two plates; and to provide a female screw nut manufactured by the method.SOLUTION: In a manufacturing method of a female screw nut 10 formed by connecting, in the state where half-split female screws a, b are faced to each other, two plates (A, B) 11, 12 having the half-split female screws a, b formed thereon respectively, connection of the two plates 11, 12 is performed in the state where a male screw 15 screwable with the half-split female screws a, b is inserted therebetween, and after connection of the plates 11, 12, the male screw 15 is unscrewed and removed.

Description

The present invention relates to a female screw nut formed using two plate members and a method for manufacturing the same.

When manufacturing a hexagonal column nut with a female thread formed in the center by machining, a through hole is first formed in the center of the hexagonal material of a predetermined length in the manufacturing process, and then a threading die, a cutting tap, etc. Threading is performed at the corners, and chamfering is performed at the corners. In addition, nuts are also manufactured by forging.

On the other hand, in Patent Document 1, a plate material is provided by a punch having a protrusion having a shape in which a male screw is separated by a plane including its central axis at the tip, and a die having a semi-cylindrical groove engaged with the tip of the punch. It has been proposed to produce a female screw by forming a female screw on the plate and combining the plate members.

Japanese Patent Laid-Open No. 5-208222

However, when a nut having an internal thread is manufactured by machining or forging, there is a problem that the efficiency is relatively low because a plurality of processes are performed.
In the female screw described in Patent Document 1, a female screw is formed by pressing a half-projected projection on a plate material, and these two plate materials are arranged with their threads facing each other, and combined into one female screw. Since the threads formed on the opposing plate material are not continuous, it is necessary to form the screw thread B that is 180 degrees out of phase with respect to the screw thread A after forming the screw thread A on one plate material. there were.
Furthermore, if the positions of these screw threads A and B are shifted within a slight range, there is a problem that it is difficult to insert the male screw.

The present invention has been made in view of such circumstances, and provides a method of manufacturing a female screw nut that is relatively easy to manufacture and ensures the accuracy of the female screw of two plate members, and a female screw nut manufactured by this method. Objective.

The manufacturing method of the internal thread nut which concerns on 1st invention along the said objective is the internal thread which connected the two board | plate materials A and B in which the half internal thread a and b were each formed, making the said internal half thread a and b face each other. A method for producing a nut, comprising:
The two plate members A and B are connected in a state where a male screw to be engaged with the half female screw a and b is inserted, and the male screw is removed after the connection.

In the method for manufacturing a female screw nut according to the present invention, the two plate members A and B on which the half female screws a and b are respectively formed may be the same.

Moreover, in the manufacturing method of the internal thread nut which concerns on this invention, it is preferable that the half internal thread a of the said board | plate material A has shifted | deviated 180 degree | times with respect to the half internal thread b of the said board | plate material B.

The manufacturing method of the internal thread nut which concerns on 2nd invention is the manufacturing method of the internal thread nut which connected the two board | plate materials A and B in which the split internal threads a and b were each formed, making the said internal split threads a and b face each other. Because
The two plate materials A and B are connected after the plate materials A and B are aligned using alignment means provided on the mating surfaces of the plate materials A and B.

In the manufacturing method of the internal thread nut which concerns on 1st, 2nd invention, it is preferable that the connection of said two board | plate materials A and B is performed by the arc welding or the resistance spot welding.

A female screw nut according to a third invention is a female screw nut manufactured by the method of manufacturing a female screw nut according to the first and second inventions, and the non-threaded portions on both sides of the plate members A and B are rectangular, circular arcs. Or a square shape.

In the manufacturing method of the female screw nut according to the first invention, the two plate members A and B are connected in a state in which the male screw to be engaged with the half female screws a and b is inserted. The spirals of the parts (and the valleys) coincide, and a more elaborate female thread nut can be formed.

In the manufacturing method of the female screw nut according to the second aspect of the invention, the plate materials A and B are aligned using the alignment means provided on the mating surfaces of the plate materials A and B, and then the plate materials A and B are connected. Therefore, the half female threads a and b can be aligned more accurately and in a short time.

In the female screw nut according to the third aspect of the invention, the non-threaded portions of the plate materials A and B are rectangular, arc, or square, so that they can be rotated without using a special tool like the wing nut. Is possible.

It is explanatory drawing which shows the manufacturing method of the internal thread nut which concerns on the 1st Embodiment of this invention, (A) is a top view, (B) is a front view, (C) is a bottom view, (D) is a side view. FIG. (A), (B) is explanatory drawing of board | plate material A, B in which the half-split female screw a, b was each formed. It is explanatory drawing which shows the manufacturing method of the internal thread nut which concerns on the 2nd Embodiment of this invention, (A) is a top view, (B) is a front view, (C) is a side view. It is a perspective view of the internal thread nut which concerns on the 3rd Embodiment of this invention.

Next, embodiments of the present invention will be described with reference to the accompanying drawings.
As shown in FIGS. 1 (A) to (D), FIGS. 2 (A) and 2 (B), a female screw nut 10 manufactured by the method for manufacturing a female screw nut according to the first embodiment of the present invention is a steel plate. Two rectangular plate materials made of stainless steel, aluminum, copper, etc. are prepared, and half female screws a and b are formed by pressing at the center of one side surface of each plate material, and plate materials 11 and 12 (an example of plate materials A and B) ). In addition, although the thickness of the plate material to be prepared is about 1 to 8 mm, the height is about 1 to 5 cm, and the width is about 6 to 10 cm, the size differs depending on the application, and the present invention is not limited to this dimension.

One circumferential female screw 14 is formed by the opposed female screws a and b. However, if the plate members 11 and 12 are simply joined, the positions of the leads of the half female screws a and b do not match. Therefore, a male screw (for example, a bolt) 15 to be screwed into the circumferential female screw 14 is prepared, and the half female screws a and b are screwed into the male screw 15 as shown in FIGS. The plate members 11 and 12 are welded. The welding may be any of manual welding, arc welding (for example, TIG welding, MIG welding), resistance spot welding, projection welding, laser welding, electron beam welding, and diffusion welding.

In this case, if the plate members 11 and 12 are the same, and the same half female screw a or b is formed on each of the plate members 11 and 12, when the circumferential female screw 14 is screwed onto the male screw 15, the positions of the plate members 11 and 12 are screwed. The plate materials 11 and 12 are displaced in the direction by (1/2) screw pitch. Here, the end portions of the plate material 11 can be cut by the amount shifted, and the end surfaces of the plate materials 11 and 12 can be matched, but since extra work is required, the half-split female screw a formed on the plate materials 11 and 12, It is preferable to shift b by (1/2) screw pitch (that is, half pitch). Here, if the (1/2) screw pitch is shifted, the half female screw a is 180 degrees out of phase with the half female screw b.

In this case, when forming the half-split female screws a and b on the plate materials 11 and 12, separate punches (upper mold) and dies (lower mold) may be used, or using the same mold apparatus, You may shift the position of the board | plate materials 11 and 12 to set, or the position of a punch by (1/2) screw pitch. After the plate members 11 and 12 are welded, the male screw 15 is removed.
By the above method, the internal thread nut 10 in which the grip portions 16 and 17 are formed on the non-threaded portions on both sides of the plate members 11 and 12 is manufactured. In addition, the shape of the grip parts 16 and 17 is free, such as a rectangle, an arc, or a square shape.

Then, the manufacturing method of the internal thread nut which concerns on the 2nd Embodiment of this invention is demonstrated, referring FIG. 3 (A), (B). Plate members 20 and 21 (corresponding to plate members A and B) each having half female screws a and b formed at the center are prepared. It is the same as in the first embodiment that the halved female screws a and b are shifted by (1/2) screw pitch in the screw direction.

Further, in this embodiment, projections 22 and 23 having a circular cross section are provided on both sides of the plate material 21, and circular holes (or recesses) 24 and 25 into which the projections 22 and 23 are fitted are formed on both sides of the plate material 20. ing. As a result, the plates 20 and 21 can be positioned, and the screw threads of the half-split female screws a and b can communicate with each other to form one circumferential female screw 27. The alignment means for the plate members 20 and 21 is formed by the projections 22 and 23 and the circular holes 24 and 25 provided on the mating surfaces of the plate members 21 and 20, respectively.

After aligning the plate materials 20 and 21 by this alignment means, the plate materials 20 and 21 are welded. Thereby, the internal thread nut 30 is formed.
FIG. 4 shows a female screw nut 31 according to a third embodiment of the present invention manufactured by applying the female screw nut manufacturing method according to the second embodiment. However, when viewed from above, a wing nut is formed by adding a semi-circle instead of a rectangle.

The present invention is not limited to the above-described embodiment, and the configuration thereof can be changed without changing the gist of the present invention.

10: female screw nut, 11, 12: plate material, 14: circumferential female screw, 15: male screw, 16, 17: grip portion, 20, 21: plate material, 22, 23: protrusion, 24, 25: circular hole, 27 : Circumferential female screw, 30: female screw nut, 31: female screw nut, 32, 33: grip part, a, b: half female screw

Claims (6)

A method of manufacturing a female screw nut in which two plate members A and B each formed with a half female screw a and b are connected with the half female screws a and b facing each other,
The method for manufacturing the female screw nut is characterized in that the connection between the two plate members A and B is performed in a state in which a male screw screwed into the half female screw a and b is inserted. 2. The method for manufacturing a female screw nut according to claim 1, wherein the two plate members A and B on which the half female screws a and b are respectively formed are the same. 2. The method for manufacturing a female screw nut according to claim 1, wherein the half female screw a of the plate member A is 180 degrees out of phase with the half female screw b of the plate member B. 3. A method of manufacturing a female screw nut in which two plate members A and B each formed with a half female screw a and b are connected with the half female screws a and b facing each other,
The connection of the two plate materials A and B is performed after the plate materials A and B are aligned using alignment means provided on the mating surfaces of the plate materials A and B. A manufacturing method of a female screw nut characterized by the above. The method for manufacturing an internal thread nut according to any one of claims 1 to 4, wherein the two plate members A and B are connected by arc welding or resistance spot welding. . An internal thread nut manufactured by the internal thread nut manufacturing method according to any one of claims 1 to 5,
A female screw nut, wherein the non-threaded portions of the plate members A and B are rectangular, arc, or square.

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