WO2011007726A1

WO2011007726A1 - Manufacturing method for l-shaped nut/bolt turning tool and l-shaped nut/bolt turning tool

Info

Publication number: WO2011007726A1
Application number: PCT/JP2010/061675
Authority: WO
Inventors: 町塚昌夫
Original assignee: 株式会社マチヅカ製作所
Priority date: 2009-07-15
Filing date: 2010-07-09
Publication date: 2011-01-20
Also published as: CN101954569A; JP4436887B1; CN101954569B; JP2011020204A

Abstract

A manufacturing method for an L-shaped nut/bolt turning tool is provided with a cutting step of cutting an elongated steel pipe to obtain a predetermined length of blank (1); an adhesion step of arranging an annular member (R) having an inner diameter larger than an outer diameter of the blank (1) on an outer periphery of a tip of the blank after the cutting step and inserting a flaring male die (20) into an inner wall of the tip of the blank (1) and flaring the tip of the blank (1) to adhere the annular member (R) tightly to the tip of the blank (1); a hexagonal aperture forming step of inserting a male die (30) having a hexagonal shape portion into the inner wall of the tip of the blank (1) after the adhesion step and forming a hexagonal aperture in the inner wall of the tip of the blank (1); and an L-shape forming step of bending the blank (1) at a predetermined position thereof into an L-shape after the hexagonal aperture forming step.

Description

Manufacturing method of L-shaped nut and bolt turning tool and L-shaped nut and bolt turning tool

The present invention relates to a method of manufacturing an L-shaped nut / bolt turning tool and an L-shaped nut / bolt turning tool, and more particularly, to an L-shaped nut / bolt turning tool capable of reinforcing a head with a ring-shaped member. The present invention relates to a manufacturing method and an L-shaped nut / bolt turning tool.

Conventionally, as a method of manufacturing an L-shaped nut / bolt turning tool, for example, there is a method of manufacturing a single-ended L-shaped wheel nut wrench (see, for example, Patent Document 1).
The raw material is a hollow long steel pipe having a predetermined outer diameter and hole diameter, and the long steel pipe is cut into a certain length to obtain a first material. The first material is pushed into a die from one direction. The shank portion is thinner than the outer diameter of the first material, and the mandrel is pushed into the head side to increase the outer diameter of the head. In addition, the aperture hole of the head is a cylinder inscribed in the hexagonal aperture in the next process. After obtaining the second material as a hole, the male material forming the hexagonal portion diameter is pushed into the second material to form the hexagonal portion diameter to obtain the third material, and the third material is a shank portion. Are bent at a predetermined position to form an L shape.
Japanese Patent Publication No. 3-27297

However, in the manufacturing method described above, it is necessary to make the shank part thinner than the outer diameter of the first material and to push the mandrel into the head side to increase the outer diameter of the head, which takes time and effort. There was a problem that it took.

An object of the present invention is to provide a method for manufacturing an L-shaped nut / bolt turning tool and an L-shaped nut / bolt turning tool by simple means so as to eliminate the above-mentioned problems.

The manufacturing method of the L-shaped nut and bolt turning tool according to claim 1 includes a cutting step of cutting a long steel pipe to obtain a material having a predetermined length, and after the cutting step, on the outer periphery of the tip of the material. , Disposing a ring-shaped member having an inner diameter larger than the outer diameter of the material, inserting a male mold for tube expansion into the inner wall at the tip of the material, and expanding the tip of the material to place the ring-shaped member at the tip of the material A close contact step, and after this close contact step, a male part having a hexagonal part diameter is inserted into the inner wall of the leading end of the material to form a hexagonal part diameter on the inner wall of the leading end of the material; and After the hexagonal portion diameter forming step, an L-shaped processing step of bending the material at a predetermined position into a L shape is provided.

The L-shaped nut / bolt turning tool according to claim 2 is a main body in which a head and a shank part are integrated, and a nut or a bolt is inserted into a hexagonal part bore provided in the head, and the head is attached. An L-shaped nut / bolt turning tool that pivots the shank portion to attach / detach the nut or the bolt, and a ring-shaped member that is in close contact with the outer periphery of the head of the main body is provided. Is.

Conventionally, in the manufacturing method in which the head and the shank part are integrated, the shank part is thinner than the outer diameter of the first material, and the mandrel is pushed into the head side to increase the outer diameter of the head part. Processing is required,
According to the manufacturing method of the L-shaped nut / bolt turning tool according to claim 1, a conventional process is provided by providing an adhesion process in which the tip of the material is expanded and the ring-shaped member is brought into close contact with the tip of the material. Unnecessarily, a strong L-shaped nut / bolt turning tool can be obtained by reinforcing the head with a ring-shaped member.

Conventionally, in the manufacturing method in which the head and the shank part are integrated, the shank part is thinner than the outer diameter of the first material, and the mandrel is pushed into the head side to increase the outer diameter of the head part. Processing is required,
According to the L-shaped nut / bolt turning tool according to claim 2, the ring-shaped member is brought into close contact with the outer periphery of the head of the main body, and the conventional processing is unnecessary, and the head is reinforced by the ring-shaped member. Thus, a strong L-shaped nut / bolt turning tool can be obtained.

FIG. 1 is a schematic perspective view of an L-shaped nut and bolt turning tool manufactured by a method of manufacturing an L-shaped nut and bolt turning tool according to an embodiment of the present invention. FIG. 2 shows a process of manufacturing an L-shaped nut / bolt turning tool. A ring-shaped member having an inner diameter larger than the outer diameter of the material is formed on the outer periphery of the material of a predetermined length obtained by cutting a long steel pipe. It is the schematic of the process to arrange | position. FIG. 3A is a schematic view of a process before inserting the male expansion tube into the inner wall at the tip of the material and expanding the tip of the material, and FIG. 3B is a diagram of FIG. FIG. FIG. 4A is a schematic diagram of a process of expanding the tip of the material by inserting a male mold for tube expansion into the inner wall at the tip of the material, and FIG. 4B is a schematic diagram of FIG. 4A. FIG. Fig.5 (a) is a schematic diagram before forming a hexagonal part diameter in the inner wall of the front-end | tip of a raw material, FIG.5 (b) is a schematic sectional drawing of Fig.5 (a). FIG. 6A is a schematic diagram of a hexagonal part diameter forming step for forming a hexagonal part diameter on the inner wall at the tip of the material, and FIG. 6B is a schematic sectional view of FIG. . Fig.7 (a) is a schematic diagram before making the front-end | tip of a ring-shaped member closely_contact | adhere to a raw material, FIG.7 (b) is a schematic sectional drawing of Fig.7 (a). FIG. 8A is a schematic view of the process of bringing the tip of the ring-shaped member into close contact with the material, and FIG. 8B is a schematic cross-sectional view of FIG. FIG. 9 is a schematic diagram of an L-shaped processing step in which a material is bent at a predetermined position to be processed into an L shape.

R ring-shaped member 1 material 20 male mold for tube expansion 30 male mold having hexagonal part diameter

A manufacturing method of an L-shaped nut and bolt turning tool and an L-shaped nut and bolt turning tool according to an embodiment of the present invention will be described with reference to the drawings.
T shown in FIG. 1 is an L-shaped nut / bolt turning tool, and the L-shaped nut / bolt turning tool T is a main body 10 in which a head 11 and a shank 12 are integrated, and a hexagonal bore diameter provided on the head 11. A nut (not shown) or a bolt (not shown) is inserted and attached, and the shank portion 12 is rotated around the head 11 to attach or detach a nut (not shown) or a bolt (not shown).
R is a ring-shaped member that is in close contact with the outer periphery of the head 11 of the main body 10. The L-shaped nut / bolt turning tool T is manufactured by the following method.

First, a long steel pipe (not shown) having a predetermined length is cut to obtain a material 1 having a predetermined length (cutting step).
The long steel pipe is, for example, STKM (carbon steel pipe for machine structure) having a length of about 370 mm, an outer diameter of about 19.1 mm, and a wall thickness of about 2 mm, or a high-tensile material.
Further, the above-described ring-shaped member R is, for example, STKM (carbon steel pipe for machine structure) having a length of about 30 mm, an outer diameter of about 22.2 mm, and a thickness of about 1.2 mm, a high-tensile material, or the like.
After the above-described cutting step, as shown in FIGS. 2 to 4, the material 1 is sandwiched between the

members

21 and 21, and a ring-shaped member R having an inner diameter larger than the outer diameter of the material 1 is formed on the outer periphery of the tip of the material 1 The tube-shaped male mold 20 is inserted into the inner wall of the tip of the material 1 to expand the tip of the material 1 and the ring-shaped member R is brought into close contact with the tip of the material 1 (contact process).

After this adhesion process, as shown in FIGS. 5 to 6, a male die 30 having a hexagonal part diameter is inserted into the inner wall at the tip of the material 1 to form a hexagonal part diameter on the inner wall at the tip of the material 1 (hexagonal). Part diameter forming step).
After this hexagonal portion diameter forming step, the tip of the ring-shaped member R is brought into close contact with the material 1 as shown in FIGS.
That is, the material 1 having a hexagonal portion diameter on the inner wall surface of the member 40 is positioned on the inner wall surface 40a of the member 40. The tip part is deformed along the shape of the material 1 and is brought into close contact with the material 1 (ring-shaped member tip contact process).

After this ring-shaped member tip contact process, using a pipe bender (not shown), as shown in FIG. 9, the main body 10 is processed into an L shape by bending at a predetermined position (L-type processing process), An L-shaped nut / bolt turning tool T can be manufactured.
That is, in the conventional manufacturing method in which the head and the shank part are integrated, the shank part is thinner than the outer diameter of the first material, and the mandrel is pushed into the head side to reduce the outer diameter of the head. Processing to enlarge is necessary,
According to the manufacturing method of the above-described L-shaped nut / bolt turning tool of the present embodiment, a close contact process is provided in which the tip end of the material 1 is expanded and the ring-shaped member R is brought into close contact with the tip end of the material 1. Reinforcement of the head 11 with the ring-shaped member R, ie, a strong L-shape that prevents twisting, distortion, elongation, and breakage due to the dual structure with the ring-shaped member R and the head 11 Nut / bolt turning tool T can be obtained.
Although there are differences depending on the vehicle type, the torque value when attaching and detaching is about 110 to about 165 N · m (10 to 15 kgf · m) on average, but the L-shaped nut / bolt turning tool T of this embodiment Was about 209 N · m on average.

In the above-described embodiment, the raw tube 1 is provided in the vertical direction and processed. However, although not shown, the raw tube 1 is preferably processed in a horizontal direction.

Claims

A cutting process of cutting a long steel pipe to obtain a material of a certain length,
After this cutting step, a ring-shaped member having an inner diameter larger than the outer diameter of the material is arranged on the outer periphery of the tip of the material, and a male mold for tube expansion is inserted into the inner wall of the tip of the material so that the tip of the material is An adhesion process for expanding the tube and bringing the ring-shaped member into close contact with the tip of the material;
After this adhesion step, a hexagonal aperture forming step of forming a hexagonal aperture on the inner wall of the tip of the material by inserting a male mold having a hexagonal aperture on the inner wall of the tip of the material;
After this hexagonal portion diameter forming step, an L-shaped processing step of bending into a L shape by bending at a predetermined position of the material;
A method for manufacturing an L-shaped nut / bolt turning tool.
The head and the shank part are an integral body, and a nut or bolt is inserted into a hexagonal bore provided in the head, and the shank part is rotated around the head to An L-shaped nut and bolt turning tool to be attached and detached,
An L-shaped nut / bolt turning tool characterized in that a ring-shaped member is provided in close contact with the outer periphery of the head of the main body.