KR100465814B1 - Method of trimming bi-directional - Google Patents

Abstract

The present invention relates to a method for trimming a multi-faceted surface, and more particularly, to a molding and trimming method using two punches so that the molding is carried out without leaving any residue in shaping a hexagonal surface on each side end portion of a material. Is in.

A feature of the present invention is a method for trimming multiple surfaces on a workpiece using a punch, comprising: a first step of feeding a forged workpiece (1) with a heading machine and placing it on a divided lower die (2); A second step of placing the material on the lower die in the first step, wherein the upper die 3 is lowered to be in close contact with the lower die; A third step of forming a hexagonal surface at the left end of the material by moving the first punch 5 on the left side of the hexagonal shape to the material if the material closely adhered to the second process is fixed by the upper and lower dies; When the left side hexagon is formed on the raw material by the third process, the second punch 6 on the right side moves, and the hexagonal surface is formed on the right end of the raw material while trimming that the hexagonal surface is formed at the left end. and; It includes a fifth process in which the right side part 9 of a raw material is isolate | separated from a hexagon surface by the 1st mil pin 7 of the left side.

Description

Bidirectional trimming method {METHOD OF TRIMMING BI-DIRECTIONAL}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trimming method for multiple surfaces, and more particularly, to a molding and trimming method in which molding is performed without leaving any residue in shaping a hexagonal surface on both side ends of a raw material.

Ordinary materials are formed, or the die-shaped die-forming process of the hexagonal head forms an additional tooth. Korean Patent Publication No. 10-0225599 discloses a method of manufacturing in the order of a forming process, an annealing process, a pressing process, a trimming process, a pershing process. The other end of the material during the forming process includes a process of forming a hexagonal head with a die mold to be easily grasped by a tool such as a monkey spanner.

In the press process of the prior art, the head portion of the coated material is placed between the upper punch of the knuckle press and the lower mold, and then cold forged up and down to form an upper groove having an inner diameter of 24 millimeters, and an upper portion of 33 millimeters. The stepped portion is formed as an upper punching machine. At this time, the wall portion of the head portion is unnecessary for the forging is formed, respectively. The trimming process removes the gushing portion generated on the head wall of the head portion generated in the pressing process.

On the other hand, in order to manufacture the hexagonal surface in both directions, it has been used by trimming one side in a press or trimming machine and then trimming the other side with a press. I've been removing debris. If the gout is not removed properly, it may stick to the hexagonal surface, causing the dimension to come off, and assembly problems continue to occur.

1 is a manufacturing process diagram according to a conventional bidirectional hexagonal trimming method, which shows the four steps. The conventional step (1) is a step of heading one end of the material, the step (2) is trimming there, and the step (3) is a step of heading the other end again, and the step (4) Trimming the other end thereof.

Conventionally, since only one hexagonal surface forming trimming punch is used, in order to manufacture hexagonal surfaces in both directions, the material should be reversed in the third and subsequent steps after the second and second steps. In particular, when the bidirectional hexagonal surface should be in the same position, first, the material trimmed on one side of the hexagonal surface is inserted into the mold and pushed into the hexagonal mold using a punch. Then, as shown in the fourth step (4) of Fig. 1, the punching direction is reversed with respect to the trimming direction, which is the upward direction, whereas the lower portion of the hexagonal surface is cut off, and the top portion (end face) is generated.

As mentioned in this case, the removal of the brush with other tools, the removal of the brush is not properly attached to the hexagonal surface can be out of dimensions, and assembly problems continue to occur. Thus, there is a problem that the dimensions of the hexagonal surface trimmed first are different from the dimensions of the opposite hexagonal surface and become a cause of a chronic defect.

SUMMARY OF THE INVENTION An object of the present invention for solving the above problems is to provide a molding and trimming method using two punches so that the molding is performed without leaving any residue in shaping the hexagonal surfaces on both side ends of the material, respectively. There is.

1 is a manufacturing process diagram according to a conventional bidirectional hexagonal trimming method.

Figures 2a, 2b, 2c, 2d, and 2e is a process diagram for manufacturing a hexagonal surface according to the bidirectional trimming method according to the present invention.

3A and 3B are manufacturing process diagrams according to another further embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

1: material 2: lower die

3: upper die die 5: left punch

6: right punch 7: first milpin

8: left side slaughter 9: right side slaughter

10: third milpin 11: second milpin

A feature of the present invention for achieving the above object is a method for trimming a polygonal surface on a workpiece by using a punch, the method for feeding the workpiece (1) forged by a heading machine and placing it on the divided lower die (2) 1 step; A second step of placing the material on the lower die in the first step, wherein the upper die 3 is lowered to be in close contact with the lower die; A third step of forming a hexagonal surface at the left end of the material by moving the first punch 5 on the left side of the hexagonal shape to the material if the material closely adhered to the second process is fixed by the upper and lower dies; When the left side hexagon is formed on the raw material by the third process, the second punch 6 on the right side moves, and the hexagonal surface is formed on the right end of the raw material while trimming that the hexagonal surface is formed at the left end. and; It includes a fifth process in which the right side part 9 of a raw material is isolate | separated from a hexagon surface by the 1st mil pin 7 of the left side.

Hereinafter, with reference to the accompanying drawings it will be described in detail with reference to the configuration and operation of the present invention.

2a to 3b is a process chart for manufacturing a hexagonal surface according to the bidirectional trimming method according to the present invention. 2A through 2E illustrate only the essential processes, and FIGS. 3A and 3B illustrate additional embodiments for continuous and automated manufacturing processes. In the present description, a relatively non-moving mold is referred to as a 'die' (2, 3), and a moving mold is called a 'punch' (5, 6).

Figure 2a shows a first step of the trimming method according to the invention. In the mold divided into the upper mold | type 3 and the lower mold | type 2, the raw material 1 forged by the heading machine (Heading M / C) is fed, and it is mounted on the lower die | dye 2. FIG. 2B shows the second process. When the material is placed on the lower die in the first process, the upper die 3 comes down and comes into close contact with the lower die.

In the drawing, it is preferable that the left and right widths of the upper die and the lower die are smaller than the length between the polygonal sides of both sides of the material 1, and the reason thereof will be described in the fourth step. In addition, it will be easily understood by those skilled in the art that the upper and lower dies should have some kind of grooves in order to be in close contact with each other.

FIG. 2C is a third step. When the material in close contact with the second step is fixed by the upper and lower dies, the hexagonal left punch (first punch, 5) is moved to the raw material side (right). A hexagonal surface is formed on the left end of the material. The punch is basically the same structure or shape as the conventional punch, but the additional structure or shape may be modified for the preferred embodiment, which will be described in the process. By the third process, chips 8 of the left hexagonal surface of the raw material are formed on the lower surface (ie, between the punch and the die).

FIG. 2D is a fourth process, when the left-side hexagon surface is formed on the raw material by the third process, the right punch (second punch, 6) is now moved to the left. Then, the hexagonal surface is molded at the right end of the raw material while the hexagonal surface is molded at the left end. That is, the gumshoes fall on the left side of the material, and the gumshoes 9 are newly formed on the right side.

The reason for the fall of the left side is as follows. The left part of the material is formed by the left trimming punch and the upper and lower dies as the material enters the first punch 5 by the force when the second punch 6 forms the hexagonal surface on the right side. Pressed left side gland (8) is to be separated. In order for the workpiece to be pushed into the left first punch, the left and right widths of the die should be smaller than the length between the two sides of the workpiece as described above, and the hexagonal grooves of the punch mold should be deeply dug.

FIG. 2E shows a fifth step in which the right side portion 9 of the raw material is separated from the hexagonal surface by the left side pin (first mill pin 7). The term 'milpin' is used in different terms, and usually means a K-Out Pin. In order to remove the right side hatch using a push rod, those skilled in the art can easily see that the hexagonal groove of the left punch mold must be penetrated and that the diameter of the push rod (8 units) must be smaller than the diameter of the groove (16 units). You will know.

In this way, the left side portion 8 is separated from the hexagonal surface by the right punch 6, and the right side portion 9 is separated from the hexagonal surface by the left side pin 10, respectively. Although the above description is directed to hexagonal plane formation, those skilled in the art may apply to any polygonal plane or any shape. It will be determined by the form of the forming and trimming punches.

As mentioned, the hexagon face is used a lot because it is suitable for tools such as spanners. In the case where hexagonal surfaces are formed on both sides of the material, the directionality of both hexagonal surfaces is usually matched. In the hexagonal surface forming and trimming method according to the present invention, the directionality of the hexagonal surface can be adjusted.

As shown in Fig. 2B and the like, the hexagonal punch has a support and a bolt coupling structure for moving the hexagonal punch. The bolting structure may be provided with a groove for bolting (outside the inclined portion of the punch) in the outer portion of the hexagonal groove related to the hexagonal surface forming, and the screw thread is formed therein again, and the screw groove is also formed in the support of the punch. This may be easily implemented by those skilled in the art.

Characteristic is that the bolt coupling structure can adjust the angle of engagement of each punch and its support, so that the direction of the hexagonal surface formed by the punch can be adjusted. Therefore, the directionality of the left and right hexagonal surfaces of the raw material may be matched, or may be any angle.

3A shows an additional sixth process in addition to the essential process described above. That is, when trimming is completed on both sides of the raw material, the upper die may move upward while the first and second punches move away from the raw material, respectively, to return to the first process state.

3B, when the sixth process is completed, the material is lifted up using a predetermined second mil pin 11, and the material is discharged using the third mil pin 10 on the right side. That is, through the automatic discharge of the finished material, it is to automatically trim the hexagonal surface of the repeated material.

In the present invention, two hexagonal punches (forming and trimming punches) are used, one milling pin for trimming, and two milling pins for automatic discharge of the material. Two milpins and two punches can be moved left and right, while the other milpin (second milpin) moves up and down. This can be easily implemented by those skilled in the art.

The present invention as described above can be molded and trimmed on both sides of the material in one continuous manufacturing process. Since the hexagons of both side ends of the material are formed in one continuous process, the directionality of the hexagons is accurate, and thus the product quality is improved. In other words, since the trimming direction is made at the head side, the head part does not cause the overgrowth, thereby reducing the defective rate.

In addition, there is an effect that the deodorant is automatically removed during the process. Furthermore, the trimming method according to the present invention has the effect that a repetitive and automatic manufacturing method can also be provided.

Claims (6)

In the method of trimming multiple surfaces on a material using a punch, A first step of feeding the forged material and placing it on the divided lower die; A second step of placing the material on the lower die in the first step, wherein the upper die is brought into close contact with the lower die; A third step of forming a polygonal surface at the left end of the material by moving the first punch on the left side of a predetermined form when the material closely adhered to the second step is fixed by the upper and lower dies; A fourth step of forming a polygonal surface at the right end of the material while trimming that the polygonal surface is formed at the left end by moving the second punch on the right side when the left corner polygon is molded in the third process; A fifth step of separating the right side portion of the raw material from the various surfaces by the first mil pin on the left side; The left and right widths of the upper die and the lower die are less than the length between the two sides of the material, bidirectional trimming method. The method of claim 1, And the left portion of the raw material in the fourth step is detached as the left portion of the raw material is removed as the raw material enters into the first punch when the second punch forms a polygonal surface. 2. The bidirectional trimming method according to claim 1, wherein the polygonal surface is hexagonal, and the internal shapes of the first and second punches correspond thereto. 4. The bidirectional trimming method according to claim 3, wherein the first and second hexagonal punches each have a bolting structure so that the directionality of the molding can be adjusted to each other. The sixth process according to claim 1 or 4, wherein when trimming is completed on both sides of the work piece, the first and second punches move away from the work piece, respectively, and the upper die is raised to return to the first process state. Further comprising, the bidirectional trimming method. The bidirectional trimming method of claim 5, further comprising, when the sixth process is completed, lifting the material up using a predetermined second milpin, and discharging the material using the third milpin on the right side. .