KR102316058B1 - A roll part - Google Patents

Abstract

The present invention relates to a roll comprising: a body part; and a protrusion part continuously positioned along the outer circumferential surface of the body part. The body part includes: a first surface of the body part; and a second surface of the body part located on the opposite surface of the first surface of the body part. The protrusion part includes: a first surface of the protrusion part; a second surface of the protrusion part located on the opposite surface of the first surface of the protrusion part; and a pressing surface continuously arranged from the first surface of the protrusion part to the second surface of the protrusion part. The outer circumferential surface includes: a first outer circumferential surface positioned on a first side of the protrusion part based on the protrusion part and adjacent to the first surface of the body part; and a second outer circumferential surface located on a second side of the protrusion part and adjacent to the second surface of the body part. The present invention can provide the roll used in a rolling method in a process of manufacturing a shaft by processing a forged shaft by the rolling method.

Description

Roll part {A ROLL PART}

The present invention relates to a roll part, and more particularly, to a roll part used in the process of manufacturing a shaft by processing a shaft forged product by a rolling method.

In general, most homes are equipped with home appliances such as refrigerators. For example, most of such refrigerators have a form in which a freezer compartment and a refrigerating compartment are installed separately in a top and bottom arrangement method.

In addition, the capacity of refrigerators tends to become larger as living standards improve and food and beverages become abundant in recent years. is in

Moreover, in order to use each door more efficiently, a plurality of pockets are provided inside each door in a stacked form, so that food and beverage products such as beverages, cans or eggs can be stored and stored in these pockets.

Accordingly, the weight of each door becomes excessive. Accordingly, in the case of a large refrigerator, a hinge in which the main body and the shaft are separately formed is provided, unlike the small refrigerator.

1 is a partially enlarged perspective view showing an intermediate hinge of a typical refrigerator, and FIG. 2 is a cross-sectional view of the hinge of FIG. 1 mounted on a door.

1 and 2, as described above, in the case of a large refrigerator, unlike a small refrigerator, a hinge in which the main body and the shaft are separately formed is provided, so that the refrigerator compartment door RD and the freezer compartment door FD rotatably mounted.

That is, the main body 2 of the hinge 1 is bolted to one side of the isolation part D of the main body B of the refrigerator from which the refrigerating compartment RR and the freezing compartment FR of the refrigerator are separated and to the side of the main body.

In addition, a bracket 3 protruding forward is formed at the position of the main body 2 , a fixing hole 4 is perforated in the bracket 3 , and a spiral is formed in the fixing hole 4 . .

In addition, a shaft 5 is inserted into the fixing hole 4 , and a freezer compartment door FD is rotatably mounted on the upper part 5a of the shaft 5 , and the refrigerator compartment door is rotatably mounted on the lower part 5b of the shaft 5 . (RD) is rotatably mounted.

A stopper 6 is formed at the position of the shaft 5, that is, at the boundary between the upper piece 5a and the lower piece 5b, and this stopper 6 is a fastening portion formed under the stopper 6 When (7) is bolted to the fixing hole (4) formed in the bracket (3) of the hinge (1), it not only limits the maximum fixing range, but also makes the stopper (6) itself in close contact with the bracket (3) to make it firm to be kept fixed.

Unexplained reference numeral 8 denotes a fastening piece for fixing the refrigerating compartment door when the refrigerating compartment door RD is fixed.

On the other hand, in the conventional shaft, (1) a forged product is manufactured by making a casting in a rod shape or by forging a general structural steel material, (2) cutting the surface of the forging product, and also forming a tab part in the forging product In order to form a tab portion through a die, (3), it can also be manufactured by cutting a portion where a bearing is installed and a portion where a sealing member is installed through a tip such as a knife blade.

However, such a conventional shaft includes a plurality of processes of cutting and processing the forged product, so that the manufacturing process is complicated and the manufacturing time is excessively required, thereby increasing the manufacturing cost.

Public utility model 1999-007056

An object of the present invention is to provide a roll part used in the rolling method in the process of manufacturing a shaft by processing a forged shaft by a rolling method.

Objects of the present invention are not limited to the objects mentioned above, and other objects not mentioned will be clearly understood by those skilled in the art from the following description.

In order to solve the above-mentioned problems, the present invention provides a body portion; and a convex portion continuously positioned along the outer circumferential surface of the body portion, wherein the body portion includes: a first surface of the body portion; and a second surface of the body located on the opposite surface of the first surface of the body, wherein the convex portion includes: a first surface of the convex portion; and a second surface of the convex portion located on the opposite surface of the first surface of the convex portion; and a pressing surface continuously disposed from the first surface of the convex part to the second surface of the convex part, wherein the outer circumferential surface is located on the first side of the convex part based on the convex part, and the body a first outer peripheral surface positioned adjacent to the first surface; And located on the second side of the convex portion, it provides a roll portion including a second outer peripheral surface positioned adjacent to the second surface of the body portion.

In addition, in the present invention, the first outer peripheral surface includes a first inclined surface, the first inclined surface is formed to have a higher step toward the first surface of the body part from the convex portion, the second outer peripheral surface is It includes a second inclined surface, wherein the second inclined surface provides a roll portion, characterized in that formed to have a lower step toward the second surface of the body portion from the convex portion.

In addition, in the present invention, the first inclined surface, the angle formed between the first surface of the convex portion and the first outer peripheral surface based on the point where the first surface of the convex portion and the first outer peripheral surface meet is an acute angle, and the second inclined surface is , Based on the point where the second surface of the convex part and the second outer circumferential surface meet, the angle between the second surface of the convex part and the second outer circumferential surface is an obtuse angle.

In addition, the present invention provides a roll part, wherein the pressing surface includes a third inclined surface, and the third inclined surface is formed to have a lower step from the first surface of the convex part to the second surface of the convex part.

In addition, the present invention provides a roll part, characterized in that the third inclined surface is an obtuse angle between the second surface of the convex part and the pressing surface based on the point where the second surface of the convex part and the pressing surface meet. .

In addition, in the present invention, the first outer peripheral surface includes a first inclined surface, the first inclined surface is formed to have a higher step toward the first surface of the body part from the convex portion, the second outer peripheral surface is It includes a second inclined surface, wherein the second inclined surface provides a roll portion, characterized in that formed to have a lower step toward the second surface of the body portion from the convex portion.

According to the present invention as described above, in the process of manufacturing the shaft by processing the forged shaft by the rolling method, it is possible to provide a roll part used in the rolling method.

In addition, the present invention simplifies the manufacturing process of the shaft by manufacturing the first body part by a method of processing the shaft forged product by a rolling method and forming a groove portion in a certain area of the shaft forged product, thereby shortening the time required for manufacturing, and , it is also possible to provide a shaft capable of reducing the manufacturing cost and a manufacturing method thereof.

1 is a partially enlarged perspective view showing an intermediate hinge of a typical refrigerator, and FIG. 2 is a cross-sectional view of the hinge of FIG. 1 mounted on a door.
3 is a flowchart for explaining a method of manufacturing a shaft according to the present invention.
4 is a schematic perspective view for explaining the roll-dice used in the rolling method according to the present invention, and FIGS. 5 and 6 are schematic plan views for explaining the operation of the roll die of FIG. 4 .
7 is a schematic cross-sectional view showing a roll unit according to a first embodiment of the present invention.
8 is a schematic cross-sectional view showing a roll unit according to a second embodiment of the present invention.
9 is a schematic cross-sectional view showing a roll part according to a third embodiment of the present invention.
10 to 14 are views for explaining the manufacturing of the shaft by processing the forged shaft by the shaft manufacturing method of the present invention.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present invention belongs It is provided to fully inform the possessor of the scope of the invention, and the present invention is only defined by the scope of the claims.

Detailed contents for carrying out the present invention will be described in detail with reference to the accompanying drawings below. Regardless of the drawings, like reference numbers refer to like elements, and "and/or" includes each and every combination of one or more of the recited items.

Although the first, second, etc. are used to describe various elements, these elements are not limited by these terms, of course. These terms are only used to distinguish one component from another. Accordingly, it goes without saying that the first component mentioned below may be the second component within the spirit of the present invention.

The terminology used herein is for the purpose of describing the embodiments and is not intended to limit the present invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, “comprises” and/or “comprising” does not exclude the presence or addition of one or more other components in addition to the stated components.

Unless otherwise defined, all terms (including technical and scientific terms) used herein may be used with the meaning commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, terms defined in a commonly used dictionary are not to be interpreted ideally or excessively unless clearly defined in particular.

Spatially relative terms "below", "beneath", "lower", "above", "upper", etc. It can be used to easily describe the correlation between a component and other components. A spatially relative term should be understood as a term that includes different directions of components during use or operation in addition to the directions shown in the drawings. For example, when a component shown in the drawings is turned over, a component described as “beneath” or “beneath” of another component may be placed “above” of the other component. can Accordingly, the exemplary term “below” may include both directions below and above. Components may also be oriented in other orientations, and thus spatially relative terms may be interpreted according to orientation.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a flowchart for explaining a method of manufacturing a shaft according to the present invention.

Referring to FIG. 3 , first, the method for manufacturing a shaft according to the present invention includes manufacturing a forged shaft by forging a raw material (S110).

The raw material may be a rod-shaped billet, and the raw material may be a material such as SUS material, carbon steel, or aluminum alloy, but the material of the raw material is not limited in the present invention.

On the other hand, the forging of the raw material may be carried out through a known extrusion molding method, which is obvious in the art, and thus a detailed description thereof will be omitted.

Next, the manufacturing method of the shaft according to the present invention includes the step of processing the forged shaft product by a rolling method to form a groove portion in a predetermined area of the shaft forged product (S120).

Hereinafter, the step S120 will be described in more detail.

4 is a schematic perspective view for explaining the roll-dice used in the rolling method according to the present invention, and FIGS. 5 and 6 are schematic plan views for explaining the operation of the roll die of FIG. 4 .

First, referring to FIG. 4 , the roll-dice 10 used in the rolling method according to the present invention includes a plurality of roll parts 100-1, 100-2. 100-3 disposed at regular intervals; and a driving unit (not shown) for moving the plurality of roll units.

At this time, referring to FIG. 4 , the plurality of roll parts 100-1, 100-2. 100-3 is composed of three, and the roll-dice according to the present invention may be defined as a 3-roll-dice method. .

On the other hand, in the drawings, the plurality of roll parts 100-1, 100-2. 100-3 is illustrated as being three, but it is preferable that the plurality of roll parts are at least two or more, and when the plurality of roll parts are two , the roll-dice according to the present invention may be defined as a two-roll-dice method.

At this time, the plurality of roll parts (100-1, 100-2. 100-3) part, the first roll part (100-1); a second roll part 100-2 disposed at an interval of 120° from the first roll part 100-1; and a third roll part 100-3 disposed at an interval of 120° from the first roll part 100-1 and the second roll part 100-2, respectively, but in the present invention, the plurality of The spacing of the roll parts 100-1, 100-2. 100-3 is not limited, and further, as described above, the plurality of roll parts 100-1, 100-2. 100-3 There is no limit to the number.

In addition, referring to FIG. 4 , the roll-dice 10 used in the rolling method according to the present invention is fastened to the first roll part 100-1 to rotate the first roll part 100-1. a first rotating shaft (20-1); a second rotation shaft 20-2 fastened to the second roll part 100-2 and rotating the second roll part 100-2; and a third rotation shaft 20-3 fastened to the third roll part 100-3 to rotate the third roll part 100-3.

That is, the plurality of roll parts may be fastened to each of the rotation shafts, and according to the rotation of the rotation shafts, the plurality of roll parts may be respectively rotated.

Next, referring to FIG. 5 , the forged shaft 200 is disposed in the central region of the plurality of roll parts 100-1, 100-2. 100-3, and the plurality of roll parts 100-1, 100- 2. By a driving unit (not shown) for moving 100-3), the plurality of roll units 100-1, 100-2. 100-3 are moved to the central region, as shown in FIG. 6 , A groove portion may be formed in the first region of the shaft forged product 200 by the plurality of roll portions 100-1, 100-2. 100-3.

Driving the roll part by such a roll-dice corresponds to a matter obvious in the art, and thus a detailed description thereof will be omitted.

Hereinafter, the roll unit according to the present invention will be described in more detail. In this case, the roll part described below may be commonly applied to the plurality of roll parts 100-1, 100-2. 100-3 shown in FIGS. 4 to 6 .

7 is a schematic cross-sectional view showing a roll unit according to a first embodiment of the present invention.

Referring to FIG. 7 , the roll part 100 according to the first embodiment of the present invention includes a cylindrical body part 100; and a convex portion 120 continuously positioned along the outer circumferential surface of the body portion 100 .

The body portion 100, the body portion first surface (110a) of the circular shape; and a second surface (110b) of a circular body located on the opposite surface of the first surface of the body (110a), wherein the outer circumferential surface is the second surface of the body portion from the first surface (110a) of the body portion (110a). It may be defined as being continuously disposed up to the surface 110b.

In this case, the first surface of the body part may be defined as an upper surface, and the second surface of the body part may be defined as a lower surface. can

Alternatively, the first surface of the body portion may be defined as a first side, and the second surface of the body portion may be defined as a second side. However, in the present invention, the first surface of the body portion and the second surface of the body portion may be defined in the present invention. It does not limit the definition of the aspect.

In addition, the convex part 120 may be defined as a protrusion protruding from the outer peripheral surface of the body part 100, and is located along the outer peripheral surface of the cylindrical shape that is the shape of the body part 100, Accordingly, the convex portion 120 may be arranged in the form of a ring along the outer circumferential surface of the body portion.

In this case, the convex portion 120 may include a convex portion first surface 120a; and a convex second surface 120b positioned on the opposite surface of the convex first surface 120a, the pressing surface continuously arranged from the convex first surface 120a to the convex second surface 120b (120c), wherein the convex first surface 120a is positioned in a direction corresponding to the body first surface 110a, and the convex second surface 120b is the second surface of the body ( 110b), and the pressing surface 120c may be defined as being positioned in a direction corresponding to the outer circumferential surface of the body part.

On the other hand, the outer circumferential surface is located on the first side of the convex portion 120 with respect to the convex portion 120 , and is located adjacent to the first surface 110a of the body portion. 1 outer peripheral surface 130; and a second outer peripheral surface 140 positioned on the second side of the convex part 120 and adjacent to the body part second surface 110b.

At this time, as will be described later, the convex portion 120 is in contact with a certain region of the shaft forged product, more specifically, the groove region, to form a shaft groove portion in the groove region of the shaft forged product.

More specifically, the pressing surface 120c of the convex portion 120 presses the groove region of the forged shaft, thereby forming a groove in the groove region of the forged shaft, and the groove portion according to the present invention A shaft groove portion may be configured. This will be described later.

At this time, the pressing surface 120c of the convex portion 120 may be formed at a first height h1 from the outer circumferential surface of the body portion 110 , and also the convex portion 120 . may be formed to have a first width W1, and the first width W1 may be defined as a length from the first convex surface 120a to the convex second surface 120b.

As described above, in the present invention, the pressing surface 120c of the convex portion 120 presses the groove region of the forged shaft, thereby forming a groove in the groove region of the forged shaft. The depth and width of the groove formed in the forged part are the above-described first height h1 of the pressing surface 120c of the convex part 120 and the first width W1 of the convex part 120 . ) can be determined by

In addition, the first outer circumferential surface 130 corresponds to an area corresponding to a 1-1 body portion area of a forged shaft to be described later, and the second outer circumferential surface 130 is a 1-2 body portion area of a shaft forged product to be described later. corresponding to the corresponding area.

In this case, the first outer circumferential surface 130 may be formed in a second width W2, and the second outer circumferential surface 140 may be formed in a third width W3, and the second width W2 ) may be defined as the length from the first surface of the body part 110a to the first surface of the convex part 120a, and the third width W3 is the length of the convex part from the second surface 110b of the body part. It may be defined as a length up to two sides 120b.

8 is a schematic cross-sectional view showing a roll unit according to a second embodiment of the present invention.

The roll unit according to the second embodiment of the present invention may refer to the above-described first embodiment, except as described later.

Referring to FIG. 8 , the roll part 100 ′ according to the second embodiment of the present invention is a convex portion continuously positioned along the outer circumferential surface of the body part 100 of the cylindrical body part 100 . (120).

In addition, the outer circumferential surface is located on the first side of the convex portion 120 with respect to the convex portion 120 , and is located adjacent to the first surface 110a of the body portion. 1 outer peripheral surface (130'); and a second outer peripheral surface 140 ′ positioned on the second side of the convex portion 120 and adjacent to the body portion second surface 110b.

At this time, in the roll part 100' according to the second embodiment of the present invention, the first outer circumferential surface 130' includes a first inclined surface, and more specifically, the first inclined surface is the convex portion. It is formed to have a higher step from 120 to the first surface 110a of the body portion.

On the other hand, in the first inclined surface, the convex first surface 120a and the first outer circumferential surface 130' are formed based on the point where the convex first surface 120a and the first outer peripheral surface 130' meet. The angle θ1 formed may be defined as an acute angle, and in the present invention, the acute angle may be greater than 88° and less than 90°, and more preferably, the acute angle is 89°40' to 89°50'. Preferably, more preferably, the acute angle is 89°45' to 89°48'.

In addition, in the roll part 100' according to the second embodiment of the present invention, the second outer circumferential surface 140' includes a second inclined surface, and more specifically, the second inclined surface is the convex portion. It is formed to have a lower step from 120 to the second surface 110b of the body portion.

On the other hand, in the second inclined surface, the convex second surface 120b and the second outer peripheral surface 140' are formed based on the point where the convex second surface 120b and the second outer peripheral surface 140' meet. The angle θ2 formed may be defined as an obtuse angle, and in the present invention, the obtuse angle may be greater than 90° and less than 92°, and more preferably, the obtuse angle is 90°40′ to 90°50′. Preferably, the obtuse angle is preferably 90°42' to 90°45'.

The reason for providing the first inclined surface and the second inclined surface as described above in the present invention will be described later.

9 is a schematic cross-sectional view showing a roll unit according to a third embodiment of the present invention.

The roll part according to the third embodiment of the present invention may refer to the above-described second embodiment except as described later.

Referring to FIG. 9 , the roll part 100 ″ according to the third exemplary embodiment of the present invention includes iron (凸) continuously positioned along the outer circumferential surface of the body part 100 of the cylindrical body part 100 . part 120'.

In addition, the outer circumferential surface is located on the first side of the convex portion 120 with respect to the convex portion 120 , and is located adjacent to the first surface 110a of the body portion. 1 outer peripheral surface (130'); and a second outer peripheral surface 140 ′ positioned on the second side of the convex portion 120 and adjacent to the body portion second surface 110b.

On the other hand, in the roll part 100' according to the third embodiment of the present invention, the first outer peripheral surface 130' includes a first inclined surface, and the second outer peripheral surface 140' includes a second inclined surface. As described above.

However, it is natural that the first outer peripheral surface and the second outer peripheral surface of the roll part according to the third embodiment of the present invention may be the same as those of the first embodiment described above.

In addition, the convex part 120' of the roll part 100'' according to the third embodiment of the present invention includes: a convex part first surface 120a'; and a convex second surface 120b ′ positioned on the opposite side of the convex first surface 120a ′, continuously from the convex first surface 120a ′ to the convex second surface 120b ′. and a pressing surface 120c' disposed thereon.

At this time, in the roll part 100' according to the third embodiment of the present invention, the pressing surface 120c' includes a third inclined surface, and more specifically, the third inclined surface is the first surface 120a' of the convex part. ) is formed to have a lower step toward the second surface of the convex portion 120b'.

On the other hand, in the third inclined surface, the convex second surface 120b' and the pressing surface 120c' are formed based on the point where the convex second surface 120b' and the pressing surface 120c' meet. The angle θ1 formed may be defined as an obtuse angle, and in the present invention, the obtuse angle may be greater than 90° and less than 92°, and more preferably, the obtuse angle is 90°40' to 90°50'. Preferably, the obtuse angle is preferably 90°42' to 90°45'.

The reason for providing the third inclined surface as described above in the present invention will be described later.

10 to 14 are views for explaining the manufacturing of the shaft by processing the forged shaft by the shaft manufacturing method of the present invention.

Meanwhile, in FIGS. 10 to 14 , the shaft 300 is a shaft 300 of a general shape, and compared with the shaft 300 of a general shape, a shaft according to the present invention will be described.

10 to 14, first, the shaft 300 of a general form, the reference body portion 310; a first body portion (321, 322, 324) positioned on one side of the reference body portion; and a second body part 330 positioned on the other side of the reference body part.

In this case, the reference body part, the first body part, and the second body part have a cylindrical shape, and a cross section corresponds to a circular shape, and the diameter of the reference body part is the diameter of the first body part and the second body part formed larger.

In addition, the first body portion (321, 322, 324), the first body portion (321, 322, 324) is located in a predetermined area of the groove portion 321; a first-first body part 322 positioned on the other side of the groove part 321 with respect to the groove part 321 and continuously positioned from the reference body part; and a 1-2 first body portion 324 positioned on one side of the groove portion 321 with respect to the groove portion 321 .

At this time, a bearing (not shown) may be fastened to the 1-1 body part 322 for smooth rotation of the shaft, and the groove part 321 is made of a rubber material and has a ring shape. A sealing member (not shown) may be fastened.

However, in the present invention, the functions of the first body part and the groove part are not limited.

In addition, the second body part 330 includes a tab part 331 positioned in a predetermined area of the second body part, and the tab part 331 is an object, for example, a refrigerator, a washing machine, a dryer, etc. The shaft may be fastened to a predetermined area.

On the other hand, as described above, the shaft of a general form is (1) a forged product by manufacturing a casting or forging a general structural steel in a rod shape, and then (2) cutting the surface of the forged product, and further, In order to form the tab portion in the forged product, the tab portion is formed through a die, and (3), the portion where the bearing is installed and the portion where the sealing member is installed may be cut through a tip such as a knife blade.

That is, a shaft of a general shape is manufactured through a cutting process of the first body parts 321 , 322 , 324 as described above. Since ash is included, the manufacturing process is complicated and the manufacturing time is excessive, and there is a problem in that the manufacturing cost increases.

Therefore, in the present invention, the shaft is manufactured by manufacturing the above-described first body part by processing the forged shaft according to the present invention having a structure to be described later by a rolling method and forming a groove part in a certain area of the shaft forged product. An object of the present invention is to provide a shaft capable of reducing the time required for manufacturing by simplifying the process and reducing manufacturing cost and a method for manufacturing the same.

More specifically, first, referring to Figure 10, the shaft forging according to the present invention, the reference body portion area (A); a first body portion region (B) positioned on one side of the reference body portion region (A); and a second body part region (C) positioned on the other side of the reference body part region (A).

At this time, the forged reference body portion 210 is located in the reference body portion area (A), and the forged first body portions (221, 222, 223, 224) are located in the first body portion area (B), and also , the forged second body part 230 is located in the second body part region (C).

In addition, the first body portion region (B) may include a groove region (B1); a 1-1 body part region (B2) located on the other side of the groove part region (B1) and continuously positioned from the reference body part region (A); a first-second body region (B3) located on one side of the groove region (B1) and continuously positioned from the groove region (B1); and a 1-3 th body part region B4 positioned on one side of the groove part region B1 and continuously positioned from the 1-2 th body part region B3.

At this time, the forging dummy body part 221 is located in the groove region B1, the forged product 1-1 body part 222 is located in the 1-1 body part region B2, and the 1-2 The forged product 1-2 body part 223 is positioned in the body part region B3, and the forged product 1-3 body part 224 is positioned in the 1-3 body part region B4.

On the other hand, the forging reference body part 210, the forging first body parts 221, 222, 223, 224, and the forged product second body part 230 have a cylindrical shape, and a cross section corresponds to a circular shape, and , the diameter of the forged reference body portion 210 is formed to be larger than the diameter of the forged first body portion 221 , 222 , 223 , 224 and the forged second body portion 230 .

In addition, in the present invention, the diameter of the forged dummy body portion 221 and the forged product 1-1 body portion 222 is formed to be larger than the diameter of the forged product 1-2 body portion 223 .

On the other hand, in the present invention, the diameter of the forged product dummy body portion 221 and the forged product 1-1 body portion 222 may be formed to be larger than the diameter of the forged product 1-3 body portion 224, and further The diameter of the forged product 1-2 main body 223 may be the same as the diameter of the forged product 1-3 body part 224 .

In addition, the diameter of the forged dummy body part 221 may be the same as the diameter of the forging 1-1 body part 222, but in the present invention, the forged dummy body part 221 and the forged product manufactured On the condition that the diameter of the 1-1 body part 222 is formed to be larger than the diameter of the first 1-2 body part 223 of the forged product, the diameter of the forged dummy body part 221 and the forged product 1-1 body There is no limitation on whether the diameters of the parts 222 are the same.

At this time, in the present invention, it is important to manufacture the forging so that the diameter of the forged product 1-1 body part 222 is the same as the diameter of the shaft 1-1 body part 422 to be manufactured, as will be described later. , through this, in the present invention, without the process of cutting the forged 1-1 body part 222, the forged 1-1 body part 222 is converted into the shaft 1-1 body part 422. can be utilized

On the other hand, in the present invention, it is preferable to manufacture the forged product so that the diameter of the forged reference body part 210 is the same as the diameter of the shaft reference body part 410 to be manufactured, as will be described later, and through this, the present invention In , the forged reference body 210 may be used as the shaft reference body 410 without a process of cutting the forged reference body 210 .

Therefore, in the present invention, in manufacturing the shaft 1-1 body part 422 and the shaft reference body part 410, without the process of cutting the forged shaft, the shaft 1-1 body part ( 422) and the shaft reference body portion 410 may be manufactured.

However, as described above, in the case of the groove part 321 in the shaft of a general shape, it was manufactured by cutting a forged product, and since a cutting process is required to form such a groove part, in a shaft of a general shape, in the case of the above reference The body part 310 and the first body parts 321 , 322 , and 324 were manufactured by a cutting process.

However, in the present invention, as described above, since a groove is formed in a certain region of the forged shaft by processing by the rolling method, the cutting process as described above can be excluded, and, in the present invention, The forged product is manufactured so that the diameter of the 1-1 body part 222 is the same as the diameter of the shaft 1-1 body part 422 to be manufactured, and the diameter of the forged reference body part 210 is manufactured. By manufacturing the forged product to be the same as the diameter of the shaft reference body portion 410 to be desired, as a result, in manufacturing the first body portion and the reference body portion according to the present invention, the above-described cutting process can be excluded.

Subsequently, referring to FIGS. 11 and 12 , for example, through the roll part according to the second embodiment described above, by processing the shaft forged product by a rolling method, a groove portion 221a may be formed in the shaft forged product. can

More specifically, as shown in FIG. 11 , the forging dummy body part 221 and the pressing surface 120c of the convex part 120 of the roll part are disposed to contact, and further, the forged product manufactured The 1-1 body part 222 and the first outer peripheral surface 130' of the roll part are disposed to correspond to each other, and the forged product 1-2 main body part 223 and the second outer peripheral surface 140' of the roll part ) are arranged so that they correspond.

At this time, as described above, the first outer circumferential surface 130 ′ may be formed with a second width W2 , and the second outer circumferential surface 140 ′ may be formed with a third width W3 . , the width of the forged article 1-1 body portion 222 is formed to be the same as the width of the first outer circumferential surface 130 ′, and the width of the forged article 1-2 body portion 223 is the second By being formed to be the same as the width of the outer circumferential surface 140', the width of the shaft 1-1 body part and the shaft 1-2 body part formed by the roll part may be defined.

Thereafter, as shown in FIG. 12 , while rotating the roll part, the pressing surface 120c of the convex part 120 of the roll part presses the forging dummy body part 221 by pressing the forged product dummy body part 221 . A shaft groove portion 221a may be formed in the dummy body portion 221 .

At this time, a certain area of the forged dummy body part 221 is not cut to form a groove, but a certain area of the forged dummy body part 221 is pushed out by plastic deformation, so that the shaft groove part 221a is will be formed

In addition, a certain area of the forged dummy main body part 221 pushed out by the plastic deformation is pushed out to the forged product 1-2 body part 223 area, and thereby, the 1-2 body part area In (B3), the shaft 1-2 body part 223a having an increased diameter than the forged product 1-2 body part 223 is formed.

That is, the shaft 1-2 body part 223a increases by a certain area of the forged product dummy body part 221 pushed out by the plastic deformation in the diameter of the forged product 1-2 body part 223 . The diameter of the shaft may be included to define the diameter of the shaft 1-2 main body portion 223a.

On the other hand, as described above, the pressing surface 120c of the convex portion 120 may be formed at a first height h1 from the outer circumferential surface of the body portion 110 , and also ) part 120 may be formed with a first width W1, and the first width W1 may be defined as a length from the first surface of the convex part 120a to the second surface of the convex part 120b. have.

That is, in the present invention, the pressing surface 120c of the convex portion 120 presses the forged dummy body portion, thereby forming the shaft groove portion 221a in the groove portion region B1, the shaft groove The depth and width of the part may be determined by the first height h1 of the pressing surface 120c of the convex part 120 and the first width W1 of the convex part 120 described above. have.

In addition, as described above, a certain area of the forged dummy body part 221 pushed out by the plastic deformation is pushed out to the forged product 1-2 body part 223 area, at this time, the amount of being pushed out, It may be determined by the first height h1 of the pressing surface 120c of the convex portion 120 and the first width W1 of the convex portion 120 .

As a result, as described above, the shaft 1-2 main body part 223a is the forged product dummy body part 221 that is pushed out by the plastic deformation to the diameter of the forged product 1-2 body part 223 . A diameter increased by a predetermined area of the shaft may be included to define the diameter of the shaft 1-2 main body portion 223a, but by the predetermined area of the forged dummy body portion 221 pushed out by the plastic deformation. The increased diameter may be determined by the first height h1 of the pressing surface 120c of the convex portion 120 and the first width W1 of the convex portion 120 .

At this time, as described above, in the present invention, the diameter of the forged product dummy body part 221 and the forged product 1-1 body part 222 is larger than the diameter of the forged product 1-3 body part 224. That is, the diameter of the forged product 1-3 body part 224 is formed smaller than the diameter of the forged product dummy body part 221 , for this reason, in the shaft 1-2 body part 223a. , this is because the diameter increased only in a certain area of the forged dummy body part 221 pushed out by the plastic deformation is considered.

That is, the shaft 1-2 body part 223a must satisfy a certain diameter. In the present invention, in the process of machining the shaft groove part by the rolling method, the forged dummy body part ( 221), in consideration of this, the diameter of the forged product 1-3 body part 224 is formed smaller than the diameter of the forged product dummy body part 221 in consideration of this.

Accordingly, through this, after the process of processing by the rolling method, the diameter of the shaft 1-1 body portion 222 and the diameter of the shaft 1-2 body portion 223a may be the same.

On the other hand, as in FIG. 7 above, the first outer circumferential surface 130. corresponds to an area corresponding to the 1-1 body portion area of the shaft forged product, and the second outer circumferential surface 130 ′ is the shaft forged product. Corresponds to the area corresponding to the area of the body part 1-2.

At this time, in the case of the 1-1 body part region of the forged shaft, it is a region constituting the 1-1 body part of the shaft according to the present invention, and the region of the 1-1 body part must satisfy a numerical value of a certain diameter. .

In addition, in the case of the 1-2 main body region of the forged shaft, it is a region constituting the 1-2 main body part of the shaft according to the present invention, and also in the case of the 1-2 main body region, a numerical value of a certain diameter is satisfied. However, in the case of the 1-2 main body region, the diameter may be configured to a slightly relaxed value compared to the 1-1 body region region.

For example, a known bearing may be fastened to the 1-1 body part. In order for the bearing to be fastened to the 1-1 body part, the diameter of the 1-1 body part satisfies a certain numerical value. However, in the case of the first and second body parts, since these bearings are not fastened, the diameter can be configured with a somewhat relaxed value.

On the other hand, as described above, in the present invention, while rotating the roll portion, the pressing surface 120c of the convex portion 120 of the roll portion presses the forged dummy body portion 221 by pressing the A shaft groove portion 221a may be formed in the forging dummy body portion 221 , and in this process, a predetermined area of the forged product dummy body portion 221 is cut to form a groove portion, the forged product dummy body portion 221 . ) is pushed out by plastic deformation, so that the shaft groove portion 221a is formed.

At this time, in the present invention, it is important to prevent a certain area of the forged dummy body part 221 pushed out by the plastic deformation from being pushed out into the forged product 1-1 body part 222 area, which is described above. This is because, as described above, the forged 1-1 body part 222 constitutes the shaft 1-1 body part with strict standards.

Therefore, in the present invention, it is important that a certain area of the forged dummy body part 221 pushed out by the plastic deformation is pushed out to the forged product 1-2 body part 223 area. It is preferable that the first outer peripheral surface 130' includes a first inclined surface, and the second outer peripheral surface 140' includes a second inclined surface.

That is, in the present invention, as described above, the first outer peripheral surface 130' of the roll part includes a first inclined surface, and the second outer peripheral surface 140' includes a second inclined surface, thereby preventing the plastic deformation. A certain area of the forged dummy body part 221 pushed out by the forged product may be easily pushed out into the forged product 1-2 main body part 223 area.

In addition, for the same reason, the pressing surface 120c' of the roll part preferably includes a third inclined surface, and through this, a certain area of the forged dummy body part 221 pushed out by the plastic deformation, It is possible to make it easier to push the forged product into the region of the first 1-2 body part 223 .

Continuingly, referring to FIG. 3 , the method for manufacturing a shaft according to the present invention includes forming a tab in a predetermined area of the forged shaft ( S130 ).

That is, referring to FIGS. 13 and 14 , by forming a predetermined tab 231 on the shaft second body part 230 of the second body part region C located on the other side of the reference body part region A, , it is possible to manufacture the shaft according to the present invention.

The shaft according to the present invention as described above may be defined as follows.

That is, referring to Figure 14, the shaft 400 according to the present invention, the reference body portion 410; a first body portion (421, 422, 423, 424) positioned on one side of the reference body portion; and a second body part 430 positioned on the other side of the reference body part.

In addition, the first body portion (421, 422, 423, 324), the first body portion (421, 422, 423, 324) is located in a predetermined region of the groove portion 421; a first-first body part 422 positioned on the other side of the groove part 421 with respect to the groove part 421 and continuously positioned from the reference body part; and a 1-2 first body portion 423 positioned on one side of the groove portion 421 with respect to the groove portion 421 .

In addition, the first body parts 421 , 422 , 423 , 324 are located on one side of the groove part 421 , and the 1-3 body parts ( 424).

At this time, the shaft 400 according to the present invention is manufactured by processing the shaft forged product, and the shaft forged product includes: a forged reference body part 210 located in the reference body part area (A); Forged first body parts (221, 222, 223, 224) located in the first body part region (B); and a forged second body part 230 positioned in the second body part region (C).

In addition, the forging dummy body portion 221 located in the groove portion area (B1) of the first body portion area (B); a forged 1-1 body part 222 located in the 1-1 body part region B2 of the first body part region B; a first-second body part 223 for forging located in the first-second body part region B3 of the first body part region B; and a forged 1-3 body part 224 positioned in the 1-3 body part region B4 of the first body part region B.

At this time, in the shaft 400 according to the present invention, the forged shaft is processed by a rolling method to form a groove portion 421 in a certain area of the forged shaft, and more specifically, the groove portion 421 is the forged product. It is characterized in that it is formed by processing the dummy body part 221 by a rolling method.

That is, the groove portion 421 may be formed by pressing the forging dummy body portion 221 by the pressing surface 120c of the convex portion 120 of the roll portion while rotating the roll portion. , At this time, the groove portion 421 is formed by pushing out a predetermined area of the forged dummy body portion 221 by plastic deformation.

In addition, the first-second body portion 423 is the diameter of the forged article first-second body portion 223 increased by a certain area of the forging dummy main body portion 221 pushed out by the plastic deformation. The diameter is included to define the diameter of the first-second body portion 423 .

Further, in the shaft 400 according to the present invention, the 1-1 body part 422 is composed of the forged 1-1 body part 222, and the reference body part 410 is the forged product. It is composed of a reference body portion 210 .

That is, in the present invention, the 1-1 body part 422 is the forged part 1-1 body part 222 is utilized to constitute a shaft, and the reference body part 410 is the forged product reference body part. 210 is utilized to configure the shaft.

As described above, in a general shaft, the first body parts 321, 322, and 324 are manufactured through a cutting process. Since it is included, the manufacturing process is complicated and the manufacturing time is excessive, and there is a problem in that the manufacturing cost increases.

However, in the present invention, by manufacturing the above-described first body part by a method of processing the forged shaft according to the present invention having the above structure by a rolling method to form a groove portion in a certain area of the shaft forged product, the shaft is manufactured It is possible to provide a shaft and a method for manufacturing the same, which can reduce the time required for manufacturing by simplifying the process and also reduce manufacturing cost.

Although embodiments of the present invention have been described with reference to the above and the accompanying drawings, those of ordinary skill in the art to which the present invention pertains can practice the present invention in other specific forms without changing its technical spirit or essential features. You will understand that there is Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

Claims (6)

body part; and a convex portion continuously positioned along the outer circumferential surface of the body portion,
The body portion, the first surface of the body portion; and a second surface of the body located on the opposite surface of the first surface of the body,
The convex portion may include a first surface of the convex portion; and a second surface of the convex portion located on the opposite surface of the first surface of the convex portion; and a pressing surface continuously arranged from the first surface of the convex part to the second surface of the convex part,
The outer circumferential surface may include a first outer circumferential surface positioned on the first side of the convex portion with respect to the convex portion and adjacent to the first surface of the body portion; and a second outer circumferential surface positioned on the second side of the convex portion and adjacent to the second surface of the body portion. The method of claim 1,
The first outer circumferential surface includes a first inclined surface, the first inclined surface is formed to have a higher step from the convex portion toward the first surface of the body portion,
The second outer circumferential surface includes a second inclined surface, and the second inclined surface is formed to have a lower step from the convex portion toward the second surface of the body portion. 3. The method of claim 2,
In the first inclined surface, an angle between the first surface of the convex portion and the first outer peripheral surface is an acute angle based on a point where the first surface of the convex part and the first outer peripheral surface meet,
In the second inclined surface, an angle between the second surface of the convex part and the second outer peripheral surface is an obtuse angle based on a point where the second surface of the convex part meets the second outer peripheral surface. The method of claim 1,
The pressing surface includes a third inclined surface, and the third inclined surface is formed to have a lower step from the first surface of the convex part to the second surface of the convex part. 5. The method of claim 4,
In the third inclined surface, an angle between the second surface of the convex part and the pressing surface is an obtuse angle based on a point where the second surface of the convex part and the pressing surface meet. 6. The method of claim 5,
The first outer circumferential surface includes a first inclined surface, the first inclined surface is formed to have a higher step from the convex portion toward the first surface of the body portion,
The second outer circumferential surface includes a second inclined surface, and the second inclined surface is formed to have a lower step from the convex portion toward the second surface of the body portion.

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