KR20240005463A - Device and method for manufacturing pin for punching of heading machine - Google Patents

Abstract

The present invention relates to a manufacturing apparatus and manufacturing method for a punch pin of a heading machine. The present invention is economical by shortening the process time by using a method using hydraulics instead of the conventional cutting process, which is low in economic efficiency because it takes a lot of processing time and has different product quality, and is excellent in economic efficiency for manufacturing products of uniform quality. This is also to prevent dimensional changes such as diameter from occurring during the engraving process or from the engraving being formed unstable. According to the present invention, the process time is shortened compared to the conventional cutting method, which took a lot of time and had different product quality, and the product quality becomes uniform, ensuring economic feasibility during mass production. In particular, according to the present invention, the product is manufactured in a single process through the press molding method, so the polishing process for sharp edges and the engraving process using a separate device, which are required when using the conventional cutting method, are not required, thereby reducing unit cost and manufacturing. It is advantageous in terms of speed. Furthermore, according to the present invention, since the outer diameter is fixed by a jig during the press-fit process, changes in the outer diameter that occur during the press-fit process can be prevented, making it possible to produce good quality products.

Description

{Device and method for manufacturing pin for punching of heading machine}

The present invention relates to an apparatus and method for manufacturing pins used in the punch process of a heading machine, and more specifically, to an apparatus and method for manufacturing pins for punches used in processing bolts or nuts, etc.

Today, with the development of manufacturing processes, various tools such as bolts and nuts are being consumed, and mass production technologies for these consumable tools are being researched and developed. For example, the head of a bolt is often engraved or embossed with text or pictures expressing the bolt's specifications or quality. In order to mass-produce such bolts, etc., a method is used to pressurize the object by placing a punch pin in a reciprocating heading machine. Meanwhile, in the case of such punch pins, their shape or size may be deformed due to repeated reciprocating motion and pressure, and because of this, the punch pins must be replaced a certain number of times or after a certain period of time. This causes the cost of the product to increase. In order to solve these problems, various research and development continues on devices and methods for manufacturing punch pins used in heading machines. In particular, in the case of these punch pins, external diameter processing, length processing, engraving processing, finishing, heat treatment, etc. Because it is manufactured through a complex multi-step process, the manufacturing cost is high.

Prior Document 1: Republic of Korea Patent No. 10-0512264 (published on July 23, 2003)

The technical object of the present invention is to provide a manufacturing device and manufacturing method for mass production of punch pins for heading machines. Specifically, when manufacturing punch pins for heading machines, the process time is shortened and the economic efficiency is excellent by using the press-fitting method using hydraulic pressure instead of the conventional cutting process, which requires a lot of processing time and is low in economic efficiency, and has different product quality. The purpose is to manufacture products of uniform quality.

In addition, the technical object of the present invention is to prevent dimensional changes such as diameter from occurring during the engraving process when manufacturing punch pins for heading machines or from unstable engravings.

According to one aspect of the present invention, a body jig having a fixing hole formed therein; It is inserted and fixed into the fixing hole, and a first insertion hole is formed at one end into which the material is inserted by a pressing pin, and a molding hole through which the inserted material is pressed into a predetermined shape is formed at the other end. forming jig; a fixing jig inserted into the fixing hole and fixed to be positioned at the other end of the molding jig, and having a second insertion hole formed therein; and a removal pin that is inserted into the second insertion hole and separates the compression-molded material by pressing it in one direction.

In addition, the material is provided in a cone shape with a predetermined first inclined surface formed at the front end, and the first inclined surface is positioned properly by contacting one end of the forming hole, so that the press-in direction can be constant.

In addition, an engraved portion in which a predetermined character or picture is engraved or embossed is formed at one end, and the outer peripheral surface is provided in a shape corresponding to the inner peripheral surface of the molding hole, so that one end of the material sequentially passes through the second insertion hole and the molding hole. An engraving pin may be further provided to engrave the text or picture in intaglio or embossing by pressing.

In addition, the main jig may have a protruding stepped portion formed on the inner peripheral surface of the other end, and the outer peripheral surface of the other end of the fixing jig may be formed in a shape corresponding to the stepped portion.

According to the present invention, the process time is shortened compared to the conventional cutting method, which took a lot of time and had different product quality, and the product quality becomes uniform, ensuring economic feasibility during mass production. In particular, according to the present invention, the product is manufactured in a single process through the press molding method, so the polishing process for sharp edges and the engraving process using a separate device, which are required when using the conventional cutting method, are not required, thereby reducing unit cost and manufacturing. It is advantageous in terms of speed.

Furthermore, according to the present invention, since the outer diameter is fixed by a jig during the press-fit process, changes in the outer diameter that occur during the press-fit process can be prevented, making it possible to produce good quality products.

1 is a photographic view of a punch pin manufactured by a punch pin manufacturing apparatus and manufacturing method for a heading machine according to an embodiment of the present invention.
Figure 2 is a cutaway view showing a pin manufacturing device for a punch of a heading machine according to an embodiment of the present invention.
Figures 3 and 4 are process flow charts showing a method of manufacturing a punch pin for a heading machine according to an embodiment of the present invention.

Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments disclosed below. In addition, in order to clearly disclose the present invention in the drawings, parts not related to the present invention are omitted, and identical or similar symbols in the drawings indicate identical or similar components.

The purpose and effect of the present invention can be naturally understood or become clearer through the following description, and the purpose and effect of the present invention are not limited to the following description.

The purpose, features and advantages of the present invention will become clearer through the following detailed description. Additionally, in describing the present invention, if it is determined that a detailed description of known technologies related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. Hereinafter, embodiments according to the present invention will be described in detail with reference to the attached drawings.

manufacturing equipment

Referring to FIGS. 2, 3, and 4, the apparatus for manufacturing a punch pin for a heading machine according to an embodiment of the present invention includes a main jig 10, a fixing jig 30 inserted into the main jig 10, and a main body. It includes a molding jig 20 that is inserted into the jig 10, is located at one end of the fixing jig 30, and has a molding hole formed therein, and molds the material M through the first insertion hole 21 of the molding jig 20. A removal pin (60) is press-molded into a shape corresponding to the shape of the molding hole by press-fitting it into a ball, and removed by pressing the molded material (M) through the second insertion hole (31) formed in the fixing jig (30). Includes.

The body jig 10 is configured to precisely fix the fixing jig 30 or molding jig 20 located inside during each pressurization and removal process. The main body jig 10 has a fixing hole 11 formed therein so that the fixing jig 30 and the forming jig 20 can be inserted and fixed therein. The main jig 10 may be provided in various shapes, such as a cylindrical shape or a polygonal column shape, but it is preferable to have a column shape, and the description will be based on the cylindrical shape. The fixing hole 11 may be provided in various shapes, but is based on a cylindrical opening. Meanwhile, as an additional example, a protruding stepped portion 12 may be formed on the inner peripheral surface of the other end of the main jig 10. The stepped portion 12 is configured to maintain the fixing jig 30 in a stationary state when the material M pressed from one end to the other is press-molded. When the stepped portion 12 is formed, the outer peripheral surface of the other end of the fixing jig 30, which will be described later, can be coupled to the stepped portion 12 by being engraved in a shape corresponding to the stepped portion 12.

The fixing jig 30 is a component that is inserted into the main jig 10 and is constructed separately from the molding jig 20 in which the molding hole 22, which will be described later, is formed, so that the molding jig 20 can be replaced due to wear of the molding hole 22. Costs incurred can be reduced. In addition, the fixing jig 30 can be used as a passage through which the removal pin 60 passes when removing the press-molded material M, which will be described later. This fixing jig 30 may be provided in a shape corresponding to the fixing hole 11 formed in the main jig 10, and will be described based on its cylindrical shape. The cylindrical fixing jig 30 is inserted into the fixing hole 11 of the main jig 10, and when a stepped portion 12 is formed in the fixing jig 30, the other end of the fixing jig 30 is a stepped portion ( It can be provided in a shape corresponding to 12). The fixing jig 30 has a second insertion hole 31 formed therein, and the second insertion hole 31 is formed along the central axis. The second insertion hole 31 is provided with a diameter larger than the outer diameter of the molding hole 22, which will be described later, so that a portion of the front end of the press-molded material M can be partially exposed through the second insertion hole 31. In order to minimize interference with the shear of the exposed material M, it may be provided with a larger diameter than the outer diameter of the molding hole 22. Preferably, it is provided with the same diameter as the outer diameter of the molding hole 22, or it is most preferably provided with the same diameter as the first insertion hole 21 of the molding jig 20, which will be described later.

Like the fixing jig 30, the forming jig 20 is inserted into the fixing hole 11 formed in the main jig 10, and processes the material M by pressurizing and press-fitting the material M. The forming jig 20 is inserted into the fixing hole 11 formed in the main jig 10 and positioned so that the other end is in contact with one end of the fixing jig 30. The forming jig 20, like the fixing jig 30, may be provided in various shapes, but will be described based on its cylindrical shape. The molding jig 20 has a first insertion hole 21 formed along the central axis at one end and a molding hole 22 formed along the central axis at the other end. The first insertion hole 21 and the molding hole 22 are positioned in a shape extending from each other, and the material M is inserted into the first insertion hole 21 and is press-fitted and passed through the molding hole 22. M) is processed into a shape corresponding to the forming hole 22. Accordingly, the forming hole 22 may have an outer diameter that is equal to or smaller than that of the first insertion hole 21. For example, the forming hole 22 may have a hexagonal pillar shape. That is, the material (M) passes through the first insertion hole (21) having a cylindrical shape, and is press-fitted and passed through the molding hole (22), thereby changing the cylindrical material (M) into the hexagonal shape of the molding hole (22). Through press processing (M2), the shear direction of the material (M) is processed to have a hexagonal pillar shape.

The removal pin 60 is inserted into the second insertion hole 31 formed in the fixing jig 30 and presses the press-fitted (M2) material (M) from the other end to one end to form the molding hole and the first insertion hole (21). ) is a configuration that removes it by breaking it away. Therefore, the front end of the removal pin 60 may be provided in a shape corresponding to the forming hole 22 or in a size smaller than that, and it is most preferable to have a shape corresponding to the shape of the forming hole 22, and is hexagonal. The explanation is based on having a pillar shape. That is, by inserting the removal pin 60 having a hexagonal column shape into the second insertion hole 31 and passing it through the molding hole 22, the press-fitted (M2) material M is moved in the direction of the first insertion hole 21. Remove it by breaking it away.

The material M may be provided in a cylindrical shape corresponding to the first insertion hole 21, and the shear in the direction in which the material M is inserted may be provided to have a cone shape by forming a first inclined surface a1. there is. In this case, the first inclined surface a1 of the material M is in contact with one end of the molding hole 22 before the press-in process (M2), so that the press-in direction can be kept constant.

As an additional example of the present invention, a process of performing an engraving (M1) on the front end of the material (M) before press-processing (M2) the material (M) may be further added, and for this purpose, an engraving pin (50) may be added. More may be provided.

The engraving pin 50 passes through the second insertion hole 31 and the forming hole 22 and engraves (M1) a predetermined character or picture on the front end of the material (M). The engraving pin 50 may have a predetermined character or picture engraved or embossed on the front end. In addition, since the stamping pin 50 must pass through the molding hole 22 through the second insertion hole 31, its outer peripheral surface may be provided in a shape corresponding to the inner peripheral surface of the molding hole 22. The engraving pin 50 as described above presses one end of the material M through the second insertion hole 31 and the molding hole 22, thereby engraving a letter or picture on the front end of the material M by engraving or embossing it. (M1). At this time, it is natural that the material (M) is located on the first insertion hole (21), and the rear end of the material (M) must be supported by a pressure pin (40) or the like. At this time, when the predetermined first inclined surface (a1) formed on the material (M) is in the correct position (F) in contact with one end of the forming hole (22), the above-mentioned engraving pin (50) must be engraved (M1).

Manufacturing method

Referring to Figures 3 and 4, the method of manufacturing a punch pin for a heading machine according to an embodiment of the present invention is to use a main jig 10 having a fixing hole 11 with a stepped portion 12 protruding on the inner peripheral surface of the other end. , a preparation step (S10) of sequentially inserting the fixing jig 30 through which the second insertion hole 31 is formed and the molding jig 20 through which the first insertion hole 21 and the molding hole 22 are sequentially formed. ), the material (M) is sequentially pressed into the first insertion hole (21) and the forming hole (22) through the pressing pin (40), so that the material (M) is shaped into a predetermined shape by the forming hole (22). A press molding step (S30) and a step of removing the press molded material (M) by passing the removal pin 60 through the second insertion hole 31 formed in the molding jig 20 and pressing it (S40). ) may include.

In addition, the material (M) is provided in a cone shape with a predetermined first inclined surface (a1) formed at the front end, and before the press molding step (S30), the first inclined surface (a1) of the material (M) is formed. In the positioning step (S15), which is placed in contact with one end of the molding hole 22, an engraved portion 51 with a predetermined character or picture engraved or embossed is formed on one end, and the outer peripheral surface is of the molding hole 22. The engraving pin 50, which has a shape corresponding to the inner peripheral surface, passes sequentially through the second insertion hole 31 and the forming hole 22 to press the material M in a fixed position (F), thereby forming the material ( It may further include an engraving step (S20) of engraving (M1) the letter or picture in engraving or embossing on one end of M).

In the preparation step (S10), the main jig 10 is formed with a fixing hole 11 with a protruding step portion 12 on the inner peripheral surface of the other end, and the fixing jig 30 is formed with a second insertion hole 31 penetrating therein. As a preparatory step for sequentially inserting the molding jig 20 in which the first insertion hole 21 and the molding hole 22 are sequentially formed, the main jig 10 and the fixing jig 30 that appear in this step or a step described later ), the forming jig 20, the material (M), and the material (M) pin have the same configuration as the punch pin manufacturing device of the heading machine according to the previously described embodiment.

In the press molding step (S30), the material (M) is placed at the front of the pressure pin (40), and the pressure pin (40) is pressed in all directions so that the material (M) located at the front of the pressure pin (40) is inserted into the first insertion hole. It passes through (21) and is press-fitted into the molding hole 22, thereby press-molding the molding hole 22 into a predetermined shape (S30).

At this time, as an additional example, the material M may be provided in a cone shape with a predetermined first inclined surface a1 formed at the front end. Through this, before the material (M) is pressed in by the pressing pin (40), the first inclined surface (a1) contacts one end of the molding hole (22), so that the material (M) is in the correct position (F), and is held in the correct position (F) specified in advance by the user. It can be press-fitted in the direction (M2).

In the material (M) removal step (S40), the previously prepared removal pin 60 is inserted into the second insertion hole 31 and the press-molded material (M) is pressed in the reverse direction again, thereby inserting the material (M) into the molding hole ( This is the step to remove from 22). That is, the press-molded material M is removed by passing the removal pin 60 through the second insertion hole 31 formed in the molding jig 20 and pressing it. At this time, the description is based on the fact that the removal pin 60 is provided with a diameter corresponding to the second insertion hole 31, but the removal pin 60 is inserted into the molding hole 22 to insert the material M into the molding hole 31. It is preferable that the front end and the outer peripheral surface of the front end where the removal pin 60 is pressed so that it can be removed from (22) are provided in a shape corresponding to the molding hole 22 or a shape of a smaller size.

As an additional example of this manufacturing method, a positioning step (S15) and an engraving step (S20) may be further included before the press molding step (S30).

In the positioning step (S15), the first inclined surface a1 of the material M is positioned so as to contact one end of the molding hole 22, so that the central axis of the material M and the central axis of the molding hole 22 are aligned on a concentric line. This is the positioning step.

In the engraving step (S20), an engraving portion 51 having a predetermined character or picture engraved or embossed at one end is formed, and an engraving pin 50 whose outer peripheral surface has a shape corresponding to the inner peripheral surface of the forming hole 22 is formed. 2 By sequentially passing through the insertion hole 31 and the forming hole 22 and pressing the material (M) in the correct position (F), the letter or picture is engraved or embossed on one end of the material (M). This is the (M1) step.

The preferred embodiments of the present invention described above have been disclosed for illustrative purposes, and those skilled in the art will be able to make various modifications, changes, and additions within the spirit and scope of the present invention, and such modifications, changes, and additions will be possible. should be regarded as falling within the scope of the above patent claims.

Those of ordinary skill in the technical field to which the present invention pertains can make various substitutions, modifications and changes without departing from the technical spirit of the present invention. Therefore, the present invention is limited to the above-described embodiments and the accompanying drawings. It is not limited by

In the above-described exemplary system, the methods are described on a flowchart basis as a series of steps or blocks; however, the invention is not limited to the order of the steps, and some steps may occur simultaneously or in a different order than other steps as described above. You can. Additionally, those skilled in the art will understand that the steps shown in the flowchart are not exclusive and that other steps may be included or one or more steps in the flowchart may be deleted without affecting the scope of the present invention.

10: Body jig 11: Fixing hole
12: Stepped part
20: Forming jig 21: First insertion hole
22: Molding hole
30: Fixing jig 31: Second insertion hole
40: Pressure pin 50: Engraved pin
51: Engraving part
60: Removal pin
M: Material M1: Engraving
M2: Press-fitting F: True position
a1: first slope
S10: Preparation step S15: Position step
S20: Engraving step S30: Press molding step
S40: Removal phase

Claims (6)

A body jig (10) having a fixing hole (11) formed therein;
It is inserted and fixed into the fixing hole 11, and a first insertion hole 21 is formed at one end into which the material M is inserted by a pressing pin 40, and the inserted material M is pressed into the predetermined position. A molding jig 20 through which a molding hole 22 for press molding into the shape of is formed at the other end;
a fixing jig (30) inserted into the fixing hole (11) and fixed to be positioned at the other end of the molding jig (20), and having a second insertion hole (31) formed therethrough; and
A removal pin (60) that is inserted into the second insertion hole (31) and separates the compression-molded material (M) by pressing it in one direction.
According to claim 1,
The material (M) is provided in a cone shape with a predetermined first inclined surface (a1) formed at the front end, and the first inclined surface (a1) is in a fixed position (F) by contacting one end of the forming hole 22. A pin manufacturing device for a punch of a heading machine, characterized in that the press-fitting direction is constant.
According to claim 2,
An engraved portion 51 with a predetermined character or picture engraved or embossed is formed at one end, and the outer peripheral surface is provided in a shape corresponding to the inner peripheral surface of the molding hole 22, so that the second insertion hole 31 and the molding hole are formed. For the punch of the heading machine, characterized in that an engraving pin (50) is further provided to engrave (M1) the letter or picture in engraving or embossing by sequentially passing through (22) and pressing one end of the material (M). Pin manufacturing equipment.
According to claim 1,
The main jig 10 has a protruding stepped portion 12 formed on the inner peripheral surface of the other end,
A pin manufacturing device for a punch of a heading machine, characterized in that the outer peripheral surface of the other end of the fixing jig (30) is formed in a shape corresponding to the step portion (12).
A main jig 10 having a fixing hole 11 with a protruding step portion 12 formed on the inner peripheral surface of the other end, a fixing jig 30 and a first insertion hole 21 having a second insertion hole 31 formed therein. and a preparation step (S10) of sequentially inserting the molding jig 20 in which the molding holes 22 are sequentially formed;
By sequentially press-fitting the material (M) into the first insertion hole (21) and the forming hole (22) through the pressing pin (40), the material (M) is press-molded into a predetermined shape by the forming hole (22). press molding step (S30); and
A heading comprising a step (S40) of removing the press-molded material (M) by passing the removal pin (60) through the second insertion hole (31) formed in the molding jig (20) and pressing it. Method of manufacturing pins for punches in a machine.
According to claim 5,
The material (M) is provided in a cone shape with a predetermined first inclined surface (a1) formed at the front end,
Before the press molding step (S30),
A positioning step (S15) of positioning the first inclined surface (a1) of the material (M) to be in contact with one end of the forming hole (22); and
An engraving portion 51 having a predetermined character or picture engraved or embossed is formed at one end, and an engraving pin 50 whose outer peripheral surface has a shape corresponding to the inner peripheral surface of the forming hole 22 is inserted into the second insertion hole 31. ) and engraving (M1) in which the letter or picture is engraved or embossed on one end of the material (M) by sequentially passing through the molding hole (22) and pressing the material (M) in a fixed position (F). A method of manufacturing a pin for a punch of a heading machine, further comprising a step (S20).