JPH0262344B2 - - Google Patents

Description

Detailed Description of the Invention "Industrial Application Field" The present invention relates to a method for manufacturing and processing an anchor, in which a rod-shaped wedge body is driven into a core hole of an anchor body having a head, and a fork at the tip of the anchor body is expanded. Regarding.

"Prior Art" Conventionally, when manufacturing the above-mentioned anchor, its outer shape was formed by cold forging, while the core hole was formed in a separate process such as cutting with a drill.

``Problems to be Solved by the Invention'' However, with conventional core hole processing means, the processing cost is high, eccentricity and diameter variations occur, and the process requires material removal. There were problems such as the inability to use the materials economically.

"Means for Solving the Problems" However, the present invention, in manufacturing the above-mentioned anchor, compresses the other end of a round bar-shaped material, one end of which is fixed to a first die, with a first punch. The first punch pin of the lever reduces the height and expands it laterally, and the second punch further compresses it to form the head of the anchor body, and the second punch pin forms a shallow core hole in the head, while the second punch pin By press-fitting the third punch pin of the third punch to be crimped onto the head of the anchor body into the shallow core hole of the material shaft core that is fixed with two dies, the core hole into which the rod-shaped wedge body is inserted is inserted into the head while stretching the material. It is formed from the upper end of the anchor body to the vicinity of the tip of the anchor body.

"Function" Therefore, according to the present invention, by press-fitting a thin third punch pin forming a small diameter core hole while stretching the material, the third punch pin is strengthened and the anchor body and its head are strengthened. It is now possible to form the core hole in the same process as the one used to form the outer shape of the anchor, which helps to consolidate the processing process during anchor manufacturing and save on materials. There is no eccentricity, and it can be formed with the same diameter and the same depth, making it easy to reduce manufacturing costs and make the product uniform.

"Embodiments" Examples of the present invention will be described below in detail based on the drawings. FIG. 1 is an explanatory view of the forming process of a T-shaped anchor by cold forging, which includes an aluminum round bar-shaped material 1 cut to a predetermined length, and one end of the material 1 is held by a first die spin 2. The material 1 is inserted and fixed into the first die 3 whose insertion length is set, and the other end of the material 1 is compressed with the first punch 4, and the height is reduced by the first punch pin 5, and the material is spread laterally for preliminary swaging. conduct. Next, the material 1 after preliminary swaging is further compressed by the second punch 6, the height is reduced by the second punch pin 7, and the material 1 is expanded laterally for finishing swaging, and the protrusion at the tip of the second punch pin 7 7a is press-fitted into the shaft core of the material 1 to form a shallow core hole 8. At this point, the outer shape of the T-shaped anchor is approximately formed, but it has not yet been formed to the product length. Furthermore, the second die is set so that the material 1 after finishing swaging can be extruded to the product length by the second die spin 9.
It is inserted and fixed into the die pin 10, and with the third punch 11 crimped onto the upper part of the material 1, this third punch pin 12 is press-fitted in advance into the shallow core hole 8 of the material 1-axis core formed during finishing swaging, The material 1 is extruded while being extended to the third punch pin 9, a core hole 13 is formed from the upper end of the material 1 to the vicinity of this tip, and the material 1 is formed into the outer shape of the product.

Note that the first and second dies 3, 10 and the first, second, and third punches 4, 6, and 11 are dies and punches of a press device (header) for cold forging; moves up and down vertically within the cylinder 14 with respect to each die 3, 10, and also moves the first and second die pins 2, 9 and the first and second
The third punch pins 5, 7, and 12 are attached to the respective dies 3, 10 and the respective punches 4, 6, and 11, which are attached to the central core portion, so as to be able to move up and down.

As mentioned above, by plastic working the material 1 by cold forging, the head 15 is formed at the upper end as shown in FIG.
The outer shape of the T-shaped anchor body 16 is formed, and the anchor body 16 is formed from the upper end of the head 15
A core hole 13 is formed near the tip.

Thereafter, a plurality of annular grooves 17 are formed in multiple stages on the outer periphery of the distal end of the anchor body 16, and a cut 18 is provided at the center of the distal end of the anchor body 16 to allow the upper part to communicate with the core hole 13.
The product is formed by processing and forming a forked part 19 at the tip.

The T-shaped anchor of this embodiment is manufactured as described above, and is used in pair with the nail 20, which is a bar-shaped wedge body.
This is used to connect and fix the mounting bracket 22 of another structure at a predetermined position on the concrete wall 21 of the structure, and the anchor body 16 that penetrates the mounting bracket 22 is driven into the concrete wall 21 through a groove prepared in advance. After that, the nail 20 is inserted into the core hole 13.
By driving into the anchor body 16 through the
The tip of the nail 20 passes through the cut 18 to the fork 19
This forked portion 19 expands within the concrete wall 21 and fixes the anchor body 16 to the concrete wall 21, and the mounting bracket 22 is crimped and fixed to the concrete wall 21 by the head 15 of the anchor body 16. It is something to do.

In the T-shaped anchor of this embodiment, not only the anchor body 16 and the head 15 are formed by cold forging, but also the core hole 13 is formed at the same time, so the product has excellent dimensional accuracy, surface, and strength. The anchor body 16 can be firmly fixed to the concrete wall 21 without impeding the wedge action of the nail 20 due to the eccentricity of the core hole 13 or variations in diameter, etc., and the anchor body 16 can be firmly fixed to the concrete wall 21 and connected to the bracket 22. can be done.

``Effects of the Invention'' As is clear from the above embodiments, the present invention has the advantage of driving a nail 20, which is a bar-shaped wedge, into the core hole 13 of an anchor body 16 having a head 15, and In manufacturing the anchor that expands the portion 19, the other end side of the round bar-shaped material 1 whose one end side is fixed to the first die 3 is attached to the first punch 4.
The first punch pin 5 is used to compress the anchor body, the height is reduced and the width is expanded laterally, the second punch 6 is used to further compress the anchor body 16, and the head 15 of the anchor body 16 is formed. While forming a shallow core hole 8, a third punch pin 12 of a third punch 11 to be crimped onto the head 15 of the anchor body 16 is press-fitted into the shallow core hole 8 of the uniaxial core of the material fixed with the second die 10. The core hole 13 into which the nail 20 is inserted is formed from the upper end of the head 15 to the vicinity of the tip of the anchor body 16 while stretching the material 1.
A thin third punch pin 1 forming a small diameter core hole 13
By press-fitting 2 while stretching material 1,
It becomes possible to form the core hole 13 in the same process as the process of forming the outer shape of the anchor body 16 and its head 15 by making the third punch pin 12 strong enough to withstand the strength, and the process of manufacturing the anchor can be simplified. It is possible to consolidate and save the material 1, and the core hole 13 can be
There is no eccentricity, and it can be formed with the same diameter and the same depth, and it has remarkable effects such as reducing manufacturing costs and making it easy to make products uniform.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the molding process of a T-shaped anchor showing an embodiment of the present invention, FIG. 2 is an overall side view of the T-shaped anchor, and FIG. 3 is an explanatory diagram of the state in which it is used. 1...Material, 2,9...Dice spin, 3,10
... Dice, 4, 6, 11 ... Punch, 5, 7,
12... Punch pin, 13... Core hole, 15... Head, 16... Anchor body, 19... Forked part, 2
0...Nail (rod-shaped wedge body).

Claims (1)

[Claims] 1. In manufacturing an anchor in which a rod-shaped wedge is driven into a core hole of an anchor body having a head and a forked portion at the tip of the anchor body is expanded, other than a round rod-shaped material whose one end side is fixed to a first die. The end side is compressed with a first punch, the height is reduced with this first punch pin, and it is expanded laterally, the end side is further compressed with a second punch to form the head of the anchor body, and the head is formed with a second punch pin. While forming a shallow core hole, in the shallow core hole of the material shaft core fixed with a second die,
The third of the third punch to be crimped onto the head of the anchor body.
A method for processing an anchor, characterized in that a core hole into which the rod-shaped wedge body is inserted is formed from the upper end of the head to the vicinity of the tip of the anchor body while stretching the material by press-fitting a punch pin.