JP2001300805A - Boring machine and boring method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inexpensively provide highly accurate boring work without requiring skillfulness for the work. SOLUTION: In this boring machine comprising mechanisms 21 and 23 for holding the outer periphery of a member 30 for boring a blind hole in an inner diameter, gear trains 3 and 4 for transmitting driving of a motor 6 to a tool, a gear 5 positioned on the end of the gear trains and the tool 13 fitted in a taper shape to the gear and setting an external shape of the gear 5 smaller than the inner diameter of the member 30, and in this method for boring the blind hole in the inner diameter by arranging the tool 13 fixed to the gear 5 inside the member so that the tool becomes an almost right angle to the member after holding the outer periphery of the member 30, a cylindrical or ring-shaped member is jewels and ornaments such as a ring 49.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for drilling a blind hole inside a cylindrical or ring-shaped member, and is particularly useful for jewelry such as rings. .

[0002]

2. Description of the Related Art The technique of forming a blind hole inside a cylindrical or ring-shaped member has no problem if the inner diameter of the cylindrical or ring-shaped member is large, but becomes more difficult as the inner diameter becomes smaller. Especially for precious metals such as rings,
In recent years, decorations such as burying precious stones in the inner diameter portion of the ring are often performed, and the inner diameter of the ring is small and difficult, despite the fact that there are many opportunities to drill holes in the inner diameter portion.

[0003] A technique for drilling a hole in the inner diameter of a ring will be described below, taking a ring as an example. Drilling to the inside diameter of a conventional ring is performed manually. A conventional method for piercing a ring shown in FIG. 7 will be described.
(A) is a figure which shows the drilling method, (b) and (c)
Indicates the shape of the drilled hole. In the drilling method, as shown in the figure (a), a manual drill 102 is used to insert a drill from the right side so as to hit approximately the center of the width of the inner diameter portion 101a of the ring 101, and the tip of the drill is positioned.

In this state, one of the holes 103 is formed obliquely, and then the drill 102 is inserted from the left side.
The hole is modified so that the periphery of the hole 103 is substantially perpendicular to the ring 101. Further, in order to make it easier to receive precious stones, as shown in FIG. 3 (c), a small-diameter hole 103b is formed as a stepped hole below the hole 103a for retaining precious stones. Since the hole is formed obliquely, the side surface is slightly tapered.

[0005]

According to the drilling work for the ring-shaped or cylindrical inner diameter such as the above-mentioned ring, the precision of position and diameter is poor due to the manual work, so that precious stones are removed in a post-process. The disadvantage is that you have to struggle when filling. In addition, since the drill is obliquely inserted from both sides, the shape of the drilled hole becomes an ellipse or the side surface is tapered. In particular, the smaller the size of the ring, the more remarkable the degree and the difficulty in burying stones.

Further, drilling a single hole requires three or four drilling operations, which is time-consuming, requires many man-hours, and is costly. In addition, such work requires considerable skill, and it is not possible to easily bring up workers. In this sense, the cost is greatly reflected.

[0007] The present invention is intended to solve such a problem, does not require a skill in the work, low cost,
Another object of the present invention is to provide a highly accurate boring process.

[0008]

The gist of the present invention for achieving the above object is to provide a drilling machine for drilling a blind hole inside a cylindrical or ring-shaped member. Or a holding mechanism for holding and fixing the outer periphery of the ring-shaped member, a transmission mechanism including a gear train for transmitting the drive of the motor to the tool, a gear positioned at the end of the transmission mechanism, and a taper fitting at the center of the gear. It is characterized in that the tool comprises a tool directly fixed, and the outer shape of the gear is smaller than the inner diameter of the cylindrical or ring-shaped member.

[0009] The gist of the drilling method of the present invention is to provide a drilling method for drilling a hole inside a cylindrical or ring-shaped member. The tool is placed inside the cylindrical or ring-shaped member, the tool is arranged so as to be substantially perpendicular to the cylindrical or ring-shaped member, and the gear located at the end of the transmission mechanism from the motor is formed into the cylindrical or ring-shaped member. It is to be moved into the inside diameter of the ring-shaped member, and to make a blind hole with a tool.

Further, the cylindrical or ring-shaped member is a jewelry material such as a ring. After cutting a long plate-shaped material to a predetermined size, a stamp is applied to a stamp or a position where a blind hole is formed. It is characterized in that it is formed into a ring shape, and the mating portion is brazed inward after brazing, and a decorative member such as precious stone is fixed to the blind hole.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a sectional assembly view of a drilling machine,
FIG. 2 is a perspective view showing a gear train meshing relationship of the drilling machine. 1 is a lower gear cover serving as a base for holding a wheel train system,
Reference numeral 2 is an upper gear cover which similarly holds the wheel train system. Reference numeral 3 denotes a drive gear fitted with the shaft 7 and driven by the motor 6, reference numeral 4 denotes an intermediate gear for transmitting rotation of the drive gear, and reference numeral 5 denotes a tool gear for holding a tool described later.

The driving gear 3 is pressed into the shaft 7 and the shaft 7 is rotated by being pressed into the bearings 11a and 11b, the intermediate gear 4 is pressed into the shaft 10 and the shaft 10 is pressed into the bearings 12a and 12a.
12b is pressed and rotated. Each bearing 11, 12
Is a screw 1 provided on the lower gear cover 1 and the upper gear cover 2
a, 2a, 1b, and 2b. The drive source is a motor 6, and rotation from the motor 6 is transmitted to a shaft 7 by a pulley 9 connected to a drive belt 8.

A tool 13 has a tip 13a having a flat pyramid shape, and a shaft portion 13b having a tapered (for example, Morse taper) shape. Therefore, the tool holding hole 5a of the tool gear 5
The shape is a tapered shape fitted to the shaft portion 13b of the tool 13. Of course, a taper is formed so that the tool 13 does not come off even when a force is applied upward during processing.

FIG. 3 is a front view showing the structure of the work holding section. Reference numeral 20 denotes a jig body, to which a work holding table 21 is screwed. A ring holding shaft 2 is provided on the upper part of the jig body 20.
3 is attached. The ring holding shaft 23 can be moved up and down by a spring 24 and has a stopper 25 above. Reference numeral 22 denotes a movable body to which the upper and lower gear covers 1 and 2 are fixed. Above the movable body 22, there is provided a stopper 26 which can be changed according to the size of the work 30. 27 is a cutting handle used at the time of processing.

The processing method in the above configuration will be described with reference to FIG. FIG. 4 is a process chart showing the procedure of processing. First, in step 1, the work 30 is set on the work holding table 21. Next, in step 2, the cutting body 27 is operated to lower the movable body 22 to bring the ring holding shaft 23 into contact with the upper part of the work 30 (illustrated by an arrow).
The tool 13 is set to rotate almost simultaneously with the contact of the ring holding shaft 23 with the work 30.

The rotation of the tool 13 is as shown in FIG.
When the motor 6 rotates, the drive gear 3 rotates by the shaft 7 via the belt 8, and rotates the tool gear 5 via the intermediate gear 4. As a result, the tool 13 fixed to the tool gear 5 rotates. After the tool 13 is rotated, as shown in Step 3, when the cutting handle 27 is operated, the tool 13 is lowered and comes into contact with the inner diameter of the work 30 (illustrated by an arrow). Next, in step 4, the cutting handle 27 is further operated, the tool 13 is lowered by a predetermined amount under the control of the stopper 26, and a tool-shaped hole is made in the inner diameter of the work 30.

Next, an example in which the apparatus and the method are applied to processing of a jewelry ring will be described. FIG. 5 is a process diagram showing a processing step of the ring, and FIG. 6 is a conceptual diagram of drilling, and FIG.
Is a front view showing the shape of a cone, (b) is a top view of a hole, (c)
Is a side sectional view of the hole. In FIG. 5, in step 11,
The long material 40 having a flat plate shape near the material thickness of the ring is cut into a predetermined length. In step 12, a mark 41 such as a brand is formed on one surface 40a of the cut long material 40, and a joint mark 42 serving as a guide for the cone 13 is formed at a position where a hole is to be formed.

In step 13, the ring 4 which is rolled up on a ring with the surface 40a on which the above-mentioned stamps 41 and 42 are stamped on the inner side.
Form 3 Then, the joint is brazed with the brazing material 44. In step 14, the outer diameter of the ring 43 is passed through a cylindrical rod 45 having a predetermined outer shape and having a slightly tapered shape to finish the roundness and the inner diameter. Next, in step 15, the hole is set in the above-described drilling machine and drilling is performed.

Here, the boring will be described with reference to the boring diagram shown in FIG. Cone 1 which is a tool shown in (a)
3 has a stepped cone shape.
Both aa and the second stage 13ab are provided with cutting blades. The outer shape of the second stage 13ab has such a diameter as to be able to perform an inner diameter processing that is suitable for mounting a precious stone described later.
The hole shape thus formed becomes a stepped hole 46 shape as shown in FIG.

Finally, as shown in step 16 of FIG.
A stone 47 such as diamond is inserted into the stepped hole 46 of No. 3,
The surroundings of the stone 47 are caulked with the bridge 48. Further, by performing necessary engraving and the like on the outer shape of the ring 43, the ring 49 is completed. In order to embed the precious stone 47 in the inner surface of the ring 49 as described above, the hole is formed in a stepped shape so that the precious stone can be easily settled, and the stepped shape is processed once by using the above-described drilling machine. In this case, the depth accuracy can be made constant and the workability can be greatly improved, and at the same time, the cost can be significantly reduced.

[0021]

As is apparent from the above description, the transmission mechanism is formed by a gear train and the tool is fitted by taper fitting in order to form a blind hole inside the cylindrical or ring-shaped member. As a result, it was possible to make a hole with a very simple mechanism and with reliable transmission. In addition, the method using the drilling machine has made the work simple and accurate. In particular, the effect that the work can be performed without a skilled person is great.

Further, by adopting the method using this machine for the drilling of the inner diameter of a precious stone such as a ring, the hole precision is remarkably improved, and anyone can work accurately. I was able to greatly increase my productivity.

[Brief description of the drawings]

FIG. 1 is a sectional assembly view of a drilling machine.

FIG. 2 is a perspective view showing a gear train meshing relationship of the drilling machine.

FIG. 3 is a front view illustrating a configuration of a work holding unit.

FIG. 4 is a process chart showing a processing procedure.

FIG. 5 is a process diagram showing a processing step of the ring.

6A and 6B are conceptual diagrams of drilling, in which FIG. 6A is a front view showing a cone shape, FIG. 6B is a top view of the hole, and FIG. 6C is a side sectional view of the hole.

7A and 7B show a conventional method for drilling a ring, FIG. 7A is a diagram showing a method for drilling, and FIGS. 7B and 7C show shapes of the drilled holes.

[Explanation of symbols]

 1, 2 Gear cover 3 Drive gear 4 Intermediate gear 5 Tool gear 6 Motor 7, 10 shaft 13 Tool 20, 22 Base 23 Ring press shaft 40 Long material 42 Seal 43 Ring 46 Stepped hole 47 Stone 47 49 Ring

Claims (4)

[Claims] 1. A drilling machine for drilling a blind hole inside a cylindrical or ring-shaped member, a holding mechanism for holding and fixing the outer periphery of the cylindrical or ring-shaped member, and a gear train transmitting drive of a motor to a tool. A transmission mechanism comprising: a transmission mechanism comprising: a transmission mechanism, a gear positioned at the end of the transmission mechanism, and a tool having the tool fixed directly to the center of the gear by taper fitting; Drilling machine characterized in that it is smaller than the inside diameter of 2. A drilling method for drilling a blind hole inside a cylindrical or ring-shaped member, wherein after holding an outer periphery of the cylindrical or ring-shaped member, a tool fixed to a gear is moved to the cylindrical or ring-shaped member. On the inside of the cylindrical member, the tool is disposed so as to be substantially perpendicular to the cylindrical or ring-shaped member, and the gear located at the end of the transmission mechanism from the motor is moved into the inner diameter of the cylindrical or ring-shaped member. A drilling method characterized by drilling a blind hole with a tool. 3. The cylindrical or ring-shaped member is a jewelry material such as a ring. After cutting a long plate-shaped material to a predetermined size, engraving is performed on the engraved mark and a mark is formed on a hole of a blind hole. 3. The method according to claim 2, wherein the inner side is formed in a ring shape, and the mating portion is brazed after forming the mating portion. 4. The drilling method according to claim 2, wherein a decorative member such as precious stone is fixed to the blind hole.