JP2846029B2 - Rolling die and processing method using the die - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a rolling die for performing a rolling process using a die and a processing method for forming a round bar using the die. is there.

[Conventional technology]

When forming a groove in a fixed shape around a round bar or forming a chamfered shape, a complicated shape is cut by an automatic machine, etc. It was generally performed by rolling.

That is, in the case of machining, cutting is performed in a fixed shape using a cutting tool, and in the case of rolling, a fixed shape is formed by passing a material between rollers. .

[Problems to be solved by the invention]

However, in the case of the cutting process, as is well known, the cutting time is considerably long, and the cutting process generates cutting chips and burrs, which is not only very troublesome but also increases the cost.

In the case of the rolling process, a roll is generally hard to process because it uses a hard material (for example, a super hard material). Therefore, it is difficult to manufacture the roll, and a small work part is required to apply pressure to the roll. However, it has a major drawback such that the device becomes very large.

On the other hand, with regard to the mold, conventionally, processing methods such as punching, bending, drawing and the like have been widely used, but the fact that a method of rolling a material and adding processing has not yet been known.

An object of the present invention is to provide a rolled metal capable of performing high-precision processing at a low cost by performing a rolling process using a die, and to form a round bar using the rolled die. An object of the present invention is to provide an engraving method that enables engraving that is visually attractive by engraving.

[Means for solving the problem]

The gist of the present invention to achieve the above object is to provide a movable portion having a positioning portion for positioning the work to roll the work on the upper die, and the lower die along the descent of the movable portion of the upper die on the work. The work is provided with a fixing part for rolling while moving the work, and this fixing is characterized by having a processing part for processing the work and a conveying part, and further a cutting for cutting the work to a fixed size. It is characterized by having a mold.

In addition, the round bar is positioned on the positioning portion of the movable portion provided on the upper die, and the stamping punch which is a processing portion is formed while rolling the round bar by moving the movable portion along the fixed portion of the lower die. It is characterized in that the round bar is engraved by passing it.

[Action]

According to the above configuration, the work to be processed is supplied to the positioning portion, the upper die is lowered, and the work is rolled by passing the punch through the lower die, and finally the work is unloaded from the die. It was done in.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a sectional view of a mold according to the present invention, and FIG. 2 is a sectional view taken along line AA of FIG.
FIG. 3 is a cross-sectional view taken along the line BB of FIG. 2, FIG. 4 is an explanatory view for explaining the shapes of the upper die and the lower die, FIG. 5 is a perspective view of the lower die, and FIG. (A) is a side view, and (b) is a cross-sectional view taken along the line C-C.

 First, the shape of the work will be described with reference to FIG.

Reference numeral 1 denotes a pin, which will be described as a piercing pin as a work as an example. Reference numeral 2 denotes an engraving portion on which, for example, a material name such as K18 or a manufacturer name is engraved. Reference numeral 3 denotes a groove, with which the locking tool is engaged.
Reference numeral 4 denotes a chamfered portion formed so as to be easily inserted into a hole in an earlobe. Since the pin 1 is processed by a rolling die described later, the groove 3 and the chamfered part 4 are processed in a uniform shape over the entire circumference, and the engraved part 2 is formed in a concave shape along the circumference.

Next, a rolling die will be described with reference to FIGS.

Reference numeral 10 denotes a rolling die, which includes an upper die 11 and a lower die 12. Upper mold 11
And the lower mold 12 have at least two stopper pins 13 and screws
Combined by 14. The upper die 11 is formed integrally with a floating shank 16 above an upper sub 15 to be a base, and an upper die 17 having a movable portion below the upper sub. Next, in the lower mold 12, a lower die 19 having a fixing portion is fitted to a lower sub 18 serving as a base of the lower mold. Upper die 17 and lower die 19
The pin 1 shown in FIG. 6 is positioned between
When the 17 is lowered, the pin 1 rotates between the upper die 17 and the lower die 19, and as shown in FIG. 5, a mark is formed by a mark punch 20 in the middle of the lower die 19 as shown in FIG. It is engraved along the circumference. The rolling die 10 shown in FIG. 1 can cut the pin 1 at the same time as the rolling process of the groove 3, the chamfered portion 4 and the stamped portion 2 of the pin 1 shown in FIG.

FIG. 2 is a cross-sectional view taken along the line AA, and the upper die shown in FIG.
The front die 17 and the lower die 19 have a line die 22 and a knockout 23 held by a fixed frame 21. Upper die 17 and lower die 19
As shown in FIG. 4, the shape between them is in conformity with the pin 1 in FIG. The wire 24 is the two center lines 2 in FIG.
5 and 26 are inserted from the direction of arrow 27. Upper die 17 is arrow 28
When it descends in the direction, the pin 1 is processed between the upper die 17 and the lower die 19, and at the same time, the knockout 23 pressed by the upper die 17 falls in the direction of arrow 29 and cuts the wire 24 at the width of the knockout 23. I do.

FIG. 7 is a partial sectional view showing details of an upper die and a lower die. The upper die 17 has a positioning projection 30 for holding the pin 1, and the cut pin 1 is extruded and held by the positioning projection 30. Further, the upper die 17 and the lower die 19 have projections 31 and 32 for forming the groove 3 of the pin 1, and more specifically, the inclined part 3 so as to be gradually processed.
3, 34 are formed. That is, as shown in FIG. 5, a projection 32 is formed on the lower die 19 at a position corresponding to the chamfered portion 4.
Are fitted to the middle part of the lower die 19. Pin 1 from above
When the blank is pressed and rotated as indicated by an arrow 37, the groove 3, the chamfered portion 4, and the engraved portion 2 are formed along the projections 32 and 38, and are carried out in the direction of the arrow 36.

Next, the processing method will be described in detail with reference to FIGS.

FIG. 8 is a cross-sectional view showing the cutting step, in which the wire 24 is connected to the wire die 22.
Through the hole 22a. Knockout 23 by lowering upper die 17 in the direction of arrow 28
Also in the direction of arrow 29, the wire 24 is cut by the relationship between the punch and the die formed between the knockout 23 and the wire die 22 to form a blank for the pin 1.

FIG. 9 is a cross-sectional view showing a delivery process, in which knockout is performed.
When the wire 24 is sent forward with the 23 returned to the original position, the blank of the pin 1 is pushed out in the direction of the lower die 19,
As shown in FIG. 10, a new wire rod 24 is positioned in the positioning convex portion 30 of the upper die 17 and inside the knockout 23.
Is set.

FIG. 11 is a partial cross-sectional view showing a rolling process,
Is moved down in the direction of the arrow 28, the pin 1 becomes the upper die 17 and the lower die 19
The groove 3 and the chamfered portion 4 are rolled by the inclined portions 33 and 34 at the beginning of the projections 31 and 32 formed on the upper die 17 and the lower die 19, and further on the way to the lower die 19. The marking part 2 is marked by the mark punch 20 located at the position shown in FIG.

FIG. 12 is a partial cross-sectional view showing the unloading step. When the upper die 17 is further lowered in the direction of arrow 28, the processing of the groove and the stamp is completed.
As a result, it falls in the direction of the arrow 36 at the step 35 formed below the lower die 19, is carried out, and the entire processing of the pin 1 is completed. By the way, only the rolling of the pin 1 is described in FIG. 11, but the cutting by the knockout 23 shown in FIG. 8 can be performed simultaneously by the lowering of the upper die 17, and the lowering of the pin 1 is completed. At the same time as the upper die 17 is raised, the cut blank of the pin 1 is pushed out and set on the positioning projection 30 of the upper die 17 so that the processing can be performed continuously.

Note that the present application is not limited to the above embodiment, and various changes can be made without changing the gist. For example, a change of a workpiece or a change of a mold in a small area is included in the present application.

〔The invention's effect〕

As described above, according to the present invention, since rolling can be performed by a mold, it is possible to perform processing only by changing a normally used press machine and a mold without particularly requiring a complicated and large-scale apparatus, In particular, production processing can be performed with a very simple manufacturing die that does not require a special rotation mechanism, and other processes (eg, cutting) can be processed simultaneously, or continuous processing can be performed to reduce costs. In addition to being able to greatly contribute to the process, it is possible to perform rolling processing with a press machine that is completely unthinkable as a conventional mold, and because the engraving is performed along the outer circumference of the bar material, In addition, the bar material does not need to be processed into a flat surface, so in the case of precious metals such as gold, there is no need to cut out the waste, and the effect of the present invention is great, such as eliminating waste. A.

[Brief description of the drawings]

1 is a cutaway view of a mold according to the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, FIG. 3 is a sectional view taken along line BB of FIG. 2, and FIG. Explanatory drawing for explaining the shape of
FIG. 6 is a perspective view of the lower die, FIG. 6 is a processed product, (a) is a side view, (b) is a CC cross-sectional view, and FIG. 7 is a detailed partial cross-sectional view of the upper die and the lower die. 8 to 12 are views for explaining a processing step, FIG. 8 is a sectional view showing a cutting step, FIG. 9 is a sectional view showing a sending step, FIG. 10 shows a positioning step, and FIG. 11 shows a rolling step. FIG. 12 is a partial sectional view showing the unloading step. 1 ... pin, 2 ... stamped part, 3 ... groove, 10 ... rolling die, 11 ... upper die, 12 ... lower die, 15 ... upper sub, 17 ... upper die, 18 ... ... lower sub, 19 ... lower die, 20 ... mark punch, 22 ... wire die, 23 ... knockout, 24 ... wire rod,
Reference numeral 30: Positioning convex portion, 31, 32: Projection, 33, 34: Inclined portion, 35: Step portion.

Claims (4)

(57) [Claims] An upper mold has a movable part for rolling a round bar material as a work, and the movable part has a positioning part for positioning the work. Along with the lower die, the lower die has a fixed portion for rolling while moving the work along the descent of the movable portion of the upper die, and the fixed portion has a processing portion for processing the work. A rolling die having a carry-out part for carrying out a work. 2. The rolling die according to claim 1, further comprising a cutting die for cutting the work to a fixed size. 3. A rolling die having an upper die and a lower die,
In a processing method of forming a round bar material as a work, a step of positioning the round bar material at a positioning portion of a movable portion provided on the upper mold, and a step of fixing the work arranged on the movable portion to a fixing portion of the lower mold. A step of rolling the round bar by moving the round bar along the path, a step of rolling and passing the round bar through a processing unit provided in the fixing unit, and a step of unloading the round bar. A processing method using a rolling die. 4. The method according to claim 3, wherein said forming is a stamping process of stamping along a circle of said round bar material by a punch.