JPH07255513A - Method for fixing gem to semi-sphere shape - Google Patents

Abstract

PURPOSE:To realize mass production by drawing a thin plate into a semi- spherical shape, boring it, bending the edge of the hole to the inside or forming a cylinder inside thereof, and enlarging the inside of a rising part by punching to provide a taper mark. CONSTITUTION:A thin plate us drawn unto a semi-spherical shaped bored, and the edge is bent to the inside or a cylinder is formed inside. An inner diameter thereof is determined at a value so as not to allow a gem 1 to slip to the outside, so that the gem 1 can seem to be more beautiful. A tip of a punch 3 is adjusted to the inner diameter, a lower part thereof is adjusted to the size of a gem diameter so as to provide a slight taper at the boundary between the tip and lower part, and the inside of a rising part is enlarged by punching to provide a taper mark. A die is formed into a spherical shape to allow entrance of the tip of the punch 3 so that dispersion of hole diameters as well as profile deformation is eliminated. Since a slight taper is provided, a gap is eliminated and centering can be performed by only inserting the gem 1 into the hole. By inserting the gem 1 and bending the rising part, fixing of the gem 1 to the semi-sphere 2 can be performed. Accordingly, mass production can be realized by press working and lightweight and low cost can be achieved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to earrings, piercings,
It relates to precious metals such as necklaces, broaches and pendants.

[0002]

2. Description of the Related Art Conventionally, a method has been used in which a hole for a large gemstone is pierced in a pure manner, and the gemstone is put in and fixed with a chisel.
Because of that, it is heavy, requires skill in stone retaining, and is expensive.

[0003]

DISCLOSURE OF THE INVENTION The present invention has been made in such a manner that a thin plate can be mass-produced by press working, stone fixing can be easily performed, and it is light and inexpensive.

[0004]

[Means for Solving the Problems]

(B) Make a hemispherical stop, make a hole, and bend the edge inward. (B) Make a cylinder inside. (C) Expand the inside of the rising part with a punch to make a taper mark.

[0005]

[Function] Due to the continuity of press working, mass production becomes possible.

[0006]

EXAMPLE Next, an example of the present invention will be described. A thin plate is used to make a hemispherical aperture, a hole is made, and its edge is bent inward, or a cylinder is made inward. At that time, the gem looks more beautiful by setting the inner diameter of the hole so that the stone does not jump out. Next, the stone is made to enter the inside of the rising part, but since the stone is generally taper cut, dust and water will enter if there is a gap, so the punch is tapered and the inside of the rising part has a certain depth. By the way, when I pressed it with a taper punch, I was able to eliminate the gap, but it took some time to align the center of the stone with the center of the hole when fixing the stone, and there were variations such as the stone jumping out. Therefore, the tip of the punch 3 is aligned with the inner diameter and the stone diameter is set in the lower part, a slight taper is provided at the boundary between the tip and the lower part, the inside of the rising part is widened by the punch, and a taper mark is made. By allowing the tip of the punch to enter the center, there is no variation in the hole diameter and there is no deformation of the outer shape, and there is a slight taper, so there is no clearance and the centering is just prepared by putting a stone in the hole. By putting in and bending the rising edge, it became possible to hold the jewel on the half-ball. By using this method at the end, for example, it is possible to make round balls by combining half balls and to fasten jewels on thin plates of various shapes such as heart shape and star shape.

[0007]

As described above, the continuity of press working enables mass production, and a light and inexpensive product can be provided.

[Brief description of drawings]

FIG. 1 is a front view of the present invention.

FIG. 2 is a process chart of the present invention

[Explanation of symbols]

 1 is a jewel 2 is a half ball 3 is a punch

Claims (3)

[Claims] 1. A hemispherical diaphragm is formed, a hole is made, and the edge is bent inward. 2. A cylinder is made inside. 3. A punch is used to expand the inside of the rising portion to form a taper mark.