KR20210081714A - Environmental-friendly manufacturing method of three-dimensional shape press parts - Google Patents

Abstract

The present invention relates to a manufacturing method of an eco-friendly three-dimensional press part, which comprises: a material supply step of supplying a strip-shaped material; an outer punching step of perforating the material to form a processing main body unit formed in an intermediate portion in a width direction of the material and a bridge unit connecting the processing main body unit to a circumference unit of the material; a drawing step of drawing the processing main body to enable an end part of a cylinder unit to have a shape where the flange unit is connected; a central hole punching step of forming a central hole unit in a center portion of the cylinder unit; a precise drawing step of drawing the processing main body unit to have a less deformation amount compared to the drawing step; and a product separation step of cutting a boundary unit between the bridge unit and the flange unit to separate a product of a structure having the cylinder unit and the flange unit from the material.

Description

Manufacturing method of eco-friendly three-dimensional press parts {ENVIRONMENTAL-FRIENDLY MANUFACTURING METHOD OF THREE-DIMENSIONAL SHAPE PRESS PARTS}

The present invention relates to a method of manufacturing an eco-friendly three-dimensional shape press part, and more particularly, to a manufacturing method of an eco-friendly three-dimensional shape press part for manufacturing a part having a three-dimensional shape.

In general, in manufacturing a part of a shape in which a flange is connected to an end of a cylindrical part, a hole is formed in a material, and a hole flange forming operation burring process of forming a hole in the material and stretching the edge of the hole in a cylindrical shape with a cylindrical press punch, and a press single shot going through the process.

However, according to such a conventional burring process, thickness defects frequently occur, and as the material corresponding to one product is individually supplied to the press forming apparatus and formed, the reliability and productivity of the product dimensions that determine the quality of the product are lowered. There was a problem that Therefore, there is a need to improve it.

Background art of the present invention is disclosed in Republic of Korea Patent Registration No. 1210861 (registered on December 5, 2012, title of invention: manufacturing method of a stainless steel gasket for flange connection of a pipe through which high-temperature and high-pressure gas flows).

An object of the present invention is to provide a method for manufacturing an eco-friendly three-dimensional press part that can further improve the dimensional accuracy and productivity of products having a three-dimensional shape.

A method of manufacturing an eco-friendly three-dimensional press part according to the present invention, a material supply step of supplying a material in the form of a strip; an outer punching step of perforating the material so that a processing body part and a bridge part connecting the processing body part with the edge part of the workpiece are formed in the middle part in the width direction of the workpiece; a drawing step of drawing the processing body part to have a shape connected to a flange part at an end of the cylindrical part; a central hole punching step of forming a central hole in the central part of the cylindrical part; a precision drawing step of drawing the machining body to have a smaller amount of deformation in the drawing step; and a product separation step of separating a product having a structure including the cylindrical portion and the flange portion from the material by cutting a boundary portion between the bridge portion and the flange portion.

The material supply step may include: a continuous supply step of continuously supplying the material in units of a set length; and a first piercing step of forming a fixing hole in which the pin of the processing device is fitted to the edge of the material.

The fixing hole portion may include: a first fixing hole formed on one side in the width direction of the material and disposed at intervals corresponding to the set length along the length direction of the material; and a second fixing hole formed on the other side in the width direction of the material, and disposed symmetrically with the first fixing hole based on a middle portion in the width direction of the material.

The outer punching step may include: a first outer punching step of forming a first outer hole having a shape extending along a part of an edge of the processing body; and a second outer punching step of forming a second outer hole portion having a shape extending along another part of the edge portion of the processing body portion.

The first outer hole portion, the left outer hole portion formed to extend along the outer periphery of the processing body located on one side of the width direction of the material; and a right outer hole formed to extend along the outer periphery of the processing body located on the other side in the width direction of the material.

The machining body part has a circular shape, and the first outer hole part and the second outer hole part are formed to extend in an arc shape, and are formed symmetrically with respect to the center of the machining body part.

The second outer hole portion is formed to extend along the periphery of the processing body portion between the left outer hole portion and the right outer hole portion, and the front end portion is located on the same width direction extension line as the fixing hole portion formed in the edge portion of the material a rear outer hole part; and a front outer hole portion formed symmetrically with the rear outer hole portion based on the front end of the rear outer hole portion.

The second outer hole portion is formed to extend between the fixing hole portion and the first outer hole portion in the rear outer hole portion and the front outer hole portion, and a bridge extension hole portion forming the bridge portion; characterized in that it further comprises .

The bridge extension hole portion may include: a first extension hole portion formed to extend between the left outer hole portion and the rear end portion of the fixing hole portion at the end of the rear outer hole portion located on one side in the width direction of the material; a second extension hole portion formed symmetrically with the first extension hole portion based on a right end of the rear outer hole portion; a third extension hole portion formed to extend between the right outer hole portion and the rear end portion of the fixing hole portion at the end of the rear outer hole portion located on the other side in the width direction of the material; and a fourth extension hole portion symmetrically formed with the third extension hole portion based on the right end of the rear outer hole portion.

The drawing step may include a first drawing step of drawing the processing body in the shape of a concave container having an inclined periphery; a second drawing step of drawing such that the radius of curvature of the corner portion is smaller while the peripheral portion has a steeper inclination; and a fourth drawing step of drawing such that the radius of curvature of the corner portion is smaller while the peripheral portion extends in the vertical direction.

The drawing step may further include, after the second drawing step, a third drawing step of drawing the edge portion to have a smaller radius of curvature while the peripheral portion has a steeper inclination.

The drawing step may further include a first idle step in which drawing of the material is paused for a set time between the first drawing step and the second drawing step.

The precision drawing step may include: a first precision drawing step of drawing a radius of curvature of the inner corner of the cylindrical portion to be smaller, and drawing with a relatively smaller deformation amount than in the drawing step; a second precision drawing step of drawing so that the radius of curvature of the inner edge of the cylindrical part is smaller; and a third precision drawing step of drawing so that the radius of curvature of the inner edge of the cylindrical part is smaller.

The precision drawing step, after the third precision drawing step, a second idle step of maintaining the material in a resting state for a set time; characterized in that it further comprises.

The present invention, after the precision drawing step, the auxiliary hole punching step of forming an auxiliary hole portion in the flange portion; characterized in that it further comprises.

The auxiliary hole punching step may include: a first striking step of correcting a dimension of the flange portion by pressing the flange portion; and a second piercing step of forming the auxiliary hole in the flange portion.

The present invention further comprises, after the precision drawing step, a flange forming step of cutting the edge of the flange portion and processing the flange portion into a desired shape while maintaining the connection with the bridge portion. .

The flange forming step may include a second striking step of correcting the dimensions of the flange portion by pressing the flange portion; and a trimming step of cutting the edge of the flange part to process the flange part into a desired shape, separating the flange part from some of the plurality of bridge parts, and maintaining a connection state with other parts; characterized in that

The product separation step may include a third striking step of correcting dimensions of the flange portion and the bridge portion by pressing the flange portion and the bridge portion; and a boundary cutting step of cutting the boundary between the bridge portion and the flange portion to separate the product from the material.

The present invention, characterized in that it further comprises a; scrap cutting step of cutting the end of the material from which the product is separated by a set length unit.

The method for manufacturing an eco-friendly three-dimensional press part according to the present invention comprises punching a strip-shaped material to form a machining body and a bridge, drawing the machined body in a shape connected to the end of a cylindrical section with a flange, and forming a central hole Thereafter, the three-dimensional shape product including the cylindrical part and the flange part can be continuously mass-produced while continuously drawing the processing body part more precisely and cutting the boundary part between the bridge part and the flange part.

In addition, the present invention is a cutting-free press forming automation technology optimized for forming a product having a three-dimensional shape in which a cylindrical portion and a flange portion are connected by press forming such as drawing, punching, etc., without cutting a flat strip material. can be implemented.

In addition, according to the present invention, one product can be manufactured whenever a material having a strip shape is moved by a set length unit, and products can be continuously manufactured at a speed corresponding to the moving speed of the strip, thereby further improving productivity. It can be molded to precise dimensions through drawing and precision drawing processes, so the defect rate can be reduced, and product rigidity can be improved due to the forging effect.

1 is a flowchart illustrating a method of manufacturing an eco-friendly three-dimensional press part according to an embodiment of the present invention.
2 is a plan view schematically illustrating the processing state of the material according to the material supply step and the outer punching step of the method for manufacturing an eco-friendly three-dimensional shape press part according to an embodiment of the present invention.
3 is a plan view and a cross-sectional view schematically illustrating a processing state of a material according to a drawing step of a method for manufacturing an eco-friendly three-dimensional shape press part according to an embodiment of the present invention.
4 is a cross-sectional view schematically illustrating a processing apparatus for performing a drawing step of a method for manufacturing an eco-friendly three-dimensional press part according to an embodiment of the present invention.
5 is a plan view and a cross-sectional view schematically illustrating the processing state of the material according to the central hole punching step and the precision drawing step of the method for manufacturing an eco-friendly three-dimensional shape press part according to an embodiment of the present invention.
6 is a cross-sectional view schematically showing a processing apparatus for performing a precision drawing step of a method for manufacturing an eco-friendly three-dimensional press part according to an embodiment of the present invention.
7 is a plan view and a cross-sectional view schematically showing the processing state of the material according to the auxiliary hole punching step and the flange forming step of the method for manufacturing an eco-friendly three-dimensional shape press part according to an embodiment of the present invention.
8 is a plan view and a cross-sectional view schematically illustrating the processing state of the material according to the product separation step and the scrap cutting step of the method for manufacturing an eco-friendly three-dimensional press part according to an embodiment of the present invention.
9 is a plan view and a cross-sectional view schematically illustrating a three-dimensional shape part manufactured according to a method for manufacturing an eco-friendly three-dimensional shape press part according to an embodiment of the present invention.

Hereinafter, an embodiment of a method for manufacturing an eco-friendly three-dimensional press part according to the present invention will be described with reference to the accompanying drawings. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to intentions or customs of users and operators. Therefore, definitions of these terms should be made based on the content throughout this specification.

1 is a flowchart illustrating a method of manufacturing an eco-friendly three-dimensional press part according to an embodiment of the present invention.

1, the method of manufacturing an eco-friendly three-dimensional press part according to an embodiment of the present invention is a material supply step (S1), an outer punching step (S2), a center hole punching step (S4), a precision drawing step (S5) ), an auxiliary hole punching step (S6), a flange forming step (S7), a product separation step (S8), and a scrap cutting step (S9).

In the material supply step (S1), the material 10 in the form of a strip is supplied. In the outer punching step (S2), the processing body part 11 and the processing body part 11 in the middle part in the width direction of the material 10, and the bridge part 15 connecting the processing body part 11 to the edge part 16 of the material 10 The material 10 is perforated to be formed (see FIG. 2 ).

In the drawing step (S3), the machining body 11 is drawn to have a shape in which the flange portion 14 is connected to the end of the cylindrical portion 12 (see FIG. 3). In the central hole punching step (S4), a central hole 13 is formed in the central portion of the cylindrical portion 12 (see FIG. 5). In the precision drawing step (S5), the machining body 11 is drawn with a smaller amount of deformation than in the drawing step (S3) (refer to FIGS. 5 and 6).

In the auxiliary hole punching step (S6), the auxiliary hole portion 141 is formed in the flange portion 14 (see FIG. 7). In the flange forming step (S7), while maintaining the connection with the bridge part 15, the edge of the flange part 14 is cut and the flange part 14 is processed into a desired shape (see FIG. 7).

In the product separation step (S8), the boundary between the bridge part 15 and the flange part 14 is cut to separate the product 20 having a structure including the cylindrical part 12 and the flange part 14 from the material 10 (see FIGS. 8 and 9). In the scrap cutting step (S9), the end of the material 10 from which the product 20 is separated is cut in units of a set length d (see FIG. 8).

2 is a plan view schematically illustrating the processing state of the material according to the material supply step and the outer punching step of the method for manufacturing an eco-friendly three-dimensional shape press part according to an embodiment of the present invention.

1 and 2, the material supply step (S1) according to an embodiment of the present invention includes a continuous supply step (S1-1) and a first piercing step (S1-2).

In the continuous supply step (S1-1), the strip-shaped material 10 is continuously supplied in units of a set length (d). In the continuous supply step (S1-1), the strip-shaped material 10 extending in the front-rear direction is continuously supplied to the front. Hereinafter, in the description of the present invention, the front-rear direction (length direction) and the left-right direction (width direction) are set with the moving direction (right side in FIG. 2) of the strip as the front.

Outer punching step (S2), center hole punching step (S4), precision drawing step (S5), auxiliary hole punching step (S6), flange forming step (S7), product separation step (S8), scrap cutting step (S9) The processing apparatus for performing each is arranged continuously from the rear to the front, and the material 10 is continuously supplied in units of a set length (d) from the rear to the front, the outer punching step (S2), the central hole punching step ( S4), precision drawing step (S5), auxiliary hole punching step (S6), flange forming step (S7), product separation step (S8), and scrap cutting step (S9) are sequentially passed.

By the continuous supply step (S1-1), the material 10 is moved forward by the set length (d), stopped for a set time (eg, 2 seconds, etc.), and then again by the set length (d) Repeat moving forward. While the movement of the material 10 is stopped, the outer punching step (S2), the central hole punching step (S4), the precision drawing step (S5), the auxiliary hole punching step (S6), the flange forming step by the processing device 30 (S7), a product separation step (S8), and a scrap cutting step (S9) are performed.

In the first piercing step (S1-2), a fixing hole portion 17 into which a pin portion (not shown) of the processing device 30 is fitted is formed in the edge portion 16 of the material 10 . Here, as the pin portion of the processing device 30, the material 10 positioned between the upper die 31 and the lower die 32 of the processing device 30 is transported in units of a set length (d). ) can be applied with lift pins that support it. The fixing hole part 17 according to an embodiment of the present invention includes a first fixing hole part 171 and a second fixing hole part 172 .

The first fixing hole 171 is formed on one side in the width direction of the material 10 , more specifically, on the edge portion 16 located on the left side (upper end in FIG. 2 ) of the material 10 , the material (10) is arranged at intervals corresponding to the set length (d) along the longitudinal direction. The second fixing hole 172 is formed on the other side in the width direction of the material 10, more specifically on the edge portion 16 located on the right side (lower end in FIG. 2) of the material 10, It is arranged symmetrically with the first fixing hole portion 171 based on the middle portion of the material 10 in the width direction.

As the material 10 is moved in units of the set length d by the continuous supply step S1-1, the first fixing hole 171 and the second fixing hole 172 correspond to the set length d. It is arranged in the front-rear direction along the edge portion 16 of the material 10 at an interval. For example, if the width of the product 20 to be manufactured is 48 mm, the material 10 may have a width of 80 mm, and the processing body 11 (described below) has a width (diameter) of 60 mm. In addition, each of the first fixing hole 171 and the second fixing hole 172 may be disposed at a distance of 65 mm in the front and rear directions.

1 and 2, the outer punching step (S2) according to an embodiment of the present invention includes a first outer punching step (S2-1) and a second outer punching step (S2-2).

In the first outer punching step ( S2-1 ), a first outer hole 18 having a shape extending along a part of the edge of the processing body 11 is formed. The processing body 11 is a part of the material 10 that is subsequently processed into a desired shape by a plurality of drawing and punching processes, that is, the product 20 . The first outer hole portion 18 according to an embodiment of the present invention includes a left outer hole portion 181 and a right outer hole portion 182 .

The left outer hole portion 181 is formed to extend along the outer periphery of the left portion of the processing body (11). The right outer hole portion 182 is formed to extend along the outer edge of the right portion of the processing body (11). The machining body 11 has a circular shape, and the first outer hole 18 and the second outer hole 19 are formed to extend in an arc shape, and are symmetrical with respect to the center of the machined body 11 . is formed

In the second outer punching step (S2-2), the second outer hole 19 having a shape extending along the other part of the edge of the processing body 11, more specifically, along the outer edges of the front and rear parts. to form The second outer hole portion 19 according to an embodiment of the present invention includes a rear outer hole portion 191 , a front outer hole portion 192 , and a bridge extension hole portion 193 .

The rear outer hole portion 191 is formed to extend along the periphery of the front portion of the processing body portion 11 between the left outer hole portion 181 and the right outer hole portion 182 . The front end of the rear outer hole portion 191 is positioned on the same width direction extension line as the fixing hole portion 17 . The front outer hole part 192 is positioned in communication with the front of the rear outer hole part 191 based on the front end of the rear outer hole part 191 , and is formed symmetrically with the rear outer hole part 191 .

The front outer hole portion 192 is formed to extend along the periphery of the rear portion of the processing body 11 between the left outer hole portion 181 and the right outer hole portion 182 positioned in the front. The left outer hole portion 181, the right outer hole portion 182, the rear outer hole portion 191, and the front outer hole portion 192 extend in a circle at a mutually spaced distance, and the inner side of the outer outer hole portion 11 is formed. And, a bridge part 15 connecting the processing body part 11 and the edge part 16 is formed in the spaced part from each other.

The bridge extension hole 193 is formed to extend between the fixing hole 17 and the first outer hole 18 in the rear outer hole portion 191 and the front outer hole portion 192 . The bridge extension hole part 193 according to an embodiment of the present invention includes a first extension hole part 194 , a second extension hole part 195 , a third extension hole part 196 , and a fourth extension hole part 197 .

The first extension hole portion 194 is formed to extend between the left outer hole portion 181 adjacent to the left end of the rear outer hole portion 191 and the rear portion of the fixing hole portion 17 positioned in front thereof. The second extension hole part 195 is formed symmetrically with the first extension hole part 194 in front of the first extension hole part 194 based on the front end of the rear outer hole part 191 . The second extension hole portion 195 is formed to extend between the front portion of the adjacent fixing hole portion 17 from the left end of the front outer hole portion 192 and the left outer hole portion 181 positioned in front thereof.

The third extension hole portion 196 is formed to extend between the rear portion of the right outer hole portion 182 and the fixing hole portion 17 adjacent to the right end of the rear outer hole portion (191). The fourth extension hole portion 197 is formed symmetrically with the third extension hole portion 196 in front of the third extension hole portion 196 based on the front end of the rear outer hole portion 191 . The fourth extension hole portion 197 is formed to extend between the front portion of the adjacent fixing hole portion 17 at the right end of the front outer hole portion 192 and the left outer hole portion 181 positioned in front thereof.

By forming the bridge extension hole portion 193 as described above, only the left outer hole portion 181, the right outer hole portion 182, the rear outer hole portion 191, and the front outer hole portion 192 without the bridge extension hole portion 193 are formed. Compared with the case, the plurality of bridge units 15 have a longer length.

Accordingly, it is possible to increase the elastic force and the restoring force more in proportion to the length of the bridge part 15, and in transforming the processing body part 11 into a desired shape by mainly applying a pressing force, the edge part 16 It is possible to further reduce loads such as tensile force, shear force, and torsion force transmitted to the Therefore, while preventing the load acting on the processing body part 11 from being unintentionally consumed by the deformation force of the edge part 16, it is possible to stably apply the deformation force only to the processing body part 11, and the edge part ( 16) can be kept constant, and workability can be further improved.

3 is a plan view and a cross-sectional view schematically illustrating a processing state of a material according to a drawing step of a method for manufacturing an eco-friendly three-dimensional press part according to an embodiment of the present invention, and FIG. 4 is an eco-friendly according to an embodiment of the present invention. It is a sectional view schematically showing a processing apparatus for performing a drawing step of a manufacturing method of a three-dimensional press part.

1, 3, and 4, the drawing step (S3) according to an embodiment of the present invention includes a first drawing step (S3-1), a first idle step (S3-2), and a second drawing step (S3-1). It includes a drawing step (S3-3), a third drawing step (S3-4), and a fourth drawing step (S3-5).

In the first drawing step (S3-1), the processing body 11 is drawn in the shape of a concave container having an inclined peripheral portion 121 . In the first idle step ( S3 - 2 ), a separate processing force is not applied to the material 10 , and is paused for a set time (eg, 4 seconds).

As the shape of the material 10 that has undergone the first drawing step (S3-1) is rapidly transformed from a flat plate shape to a container shape, heat is generated and the spring force to change to the original shape is also applied to the bending deformation part. it will work By going through the first idle step (S3-2), it is possible to give the material 10 an adaptation time to the deformation force compared to the case where the drawing process is continuously performed without a rest time, and thus processing stabilization, that is, the target It is possible to improve the processing precision into the shape.

In the second drawing step (S3-3), while the peripheral portion 121 has a steeper inclination, the radius of curvature of the corner portion 123 is drawn smaller. In the third drawing step (S3-4), after the second drawing step (S3-3), the peripheral portion 121 has a steeper inclination and the radius of curvature of the corner portion 123 is drawn smaller. In the fourth drawing step (S3-5), while the peripheral portion 121 extends in the vertical direction, the radius of curvature of the corner portion 123 is drawn smaller.

As described above, a plurality of times including the first drawing step (S3-1), the second drawing step (S3-3), the third drawing step (S3-4), and the fourth drawing step (S3-5) Through the drawing process, the processing body 11 has a shape in which the flange portion 14 is connected to the end of the cylindrical portion 12 in a flat plate shape as shown in FIG. 3 . The cylindrical portion 12 has a structure including a circumferential portion 121 having a circular cross-sectional shape, and a bottom portion 122 that is flatly formed in a disk shape on an inner end of the circumferential portion 121 .

5 is a plan view and a cross-sectional view schematically showing the processing state of the material according to the center hole punching step and the precision drawing step of the method for manufacturing an eco-friendly three-dimensional press part according to an embodiment of the present invention, and FIG. It is a cross-sectional view schematically showing a processing apparatus for performing a precision drawing step of a method for manufacturing an eco-friendly three-dimensional shape press part according to an embodiment.

1 and 5 , in the central hole punching step ( S4 ), a central hole 13 is formed on the bottom 122 located in the central portion of the cylindrical portion 12 . Then, in the precision drawing step (S5), the first drawing step (S3-1), the second drawing step (S3-3), the third drawing step (S3-4), the fourth drawing step (S3-5) ) drawing processing of the machining body 11 to have a smaller amount of deformation than the amount of deformation by each.

1, 5, and 6, the precision drawing step (S5) according to an embodiment of the present invention is a first precision drawing step (S5-1), a second precision drawing step (S5-2) , a third precision drawing step (S5-3), and a second idle step (S5-4).

In the first precision drawing step (S5-1), the radius of curvature of the corner portion 123 of the cylindrical portion 12 is drawn smaller. In the second precision drawing step (S5-2), the radius of curvature of the corner portion 123 is drawn smaller. In the third precision drawing step (S5-3), the radius of curvature of the corner portion 123 is drawn smaller.

In the precision drawing step (S5), in consideration of the spring back phenomenon of the material 10, the drawing is drawn with a relatively small amount of deformation than in the drawing step (S3). As the precision drawing step (S5) is made in a state in which the center hole part 13 is formed on the bottom part 122, in particular, the inner edge part 124 in contact with the bottom part 122 has a smaller radius of curvature without breaking. More stable and precise machining is possible.

By the precision drawing step (S5), the inner edge portion 124 may have a radius of curvature of 0 or more to 0.5 or less. As described above, in the precision drawing step (S5), in processing the corner portion 123, in particular, the radius of curvature of the inner corner portion 124 to be smaller, the diameter of the peripheral portion 121 can be gradually reduced. .

In the second idle step ( S5 - 4 ), a separate processing force is not applied to the material 10 , and is paused for a set time (eg, 4 seconds). The material 10 that has passed through the first precision drawing step (S5-1), the second precision drawing step (S5-2), and the third precision drawing step (S5-3) is prepared in the second idle step (S3-2). ), it is possible to give the material 10 an adaptation time to the deformation force compared to the case where the drawing process is continuously performed without a pause time, thereby stabilizing the processing, that is, improving the processing precision to the desired shape can try to

7 is a plan view and a cross-sectional view schematically illustrating the processing state of the material according to the auxiliary hole punching step and the flange forming step of the method for manufacturing an eco-friendly three-dimensional shape press part according to an embodiment of the present invention.

1 and 7, the auxiliary hole punching step (S6) according to an embodiment of the present invention includes a first striking step (S6-1) and a second piercing step (S6-2).

In the first striking step (S6-1), the flange portion 14 is flatly pressed, that is, by striking, the dimension of the flange portion 14 deformed during the previous process, for example, Correct the thickness, flatness, etc. In pressing the flange portion 14 flatly, the flange portion as a portion corresponding to the flange portion 14 while sandwiching the portion corresponding to the cylindrical portion 12 of the upper die 31 on the upper portion of the cylindrical portion 12 . (14) is pressed downward toward the lower die (32) side. Accordingly, the flatness of the flange portion 14 can be corrected while stably maintaining the shape of the cylindrical portion 12 .

In the second piercing step (S6-2), an auxiliary hole 141 is formed in the flange portion 14 . By correcting the shape and size of the flange portion 14 through the first striking step (S6-1), the auxiliary hole portion 141 on the flange portion 14 is precisely formed with the set size and the set shape at the set position. can do. Here, the auxiliary hole portion 141 corresponds to a fastening hole portion for fixing the product 20 to the installation object, and a plurality of auxiliary hole portions 141 are spaced apart.

1 and 7, the flange forming step (S7) according to an embodiment of the present invention includes a second striking step (S7-1) and a trimming step (S7-2).

In the second striking step (S7-1), the flange portion 14 is flatly pressed, that is, struck, and the dimensions of the flange portion 14 deformed during the entire process, for example, thickness, flatness, etc. Correct it. In pressing the flange portion 14 flatly, the flange portion as a portion corresponding to the flange portion 14 while sandwiching the portion corresponding to the cylindrical portion 12 of the upper die 31 on the upper portion of the cylindrical portion 12 . (14) is pressed downward toward the lower die (32) side. Accordingly, the flatness of the flange portion 14 can be corrected while stably maintaining the shape of the cylindrical portion 12 .

In the trimming step (S7-2), the edge of the flange portion 14 is cut and the flange portion 14 is processed into a desired shape, but the flange portion 14 is separated from some of the plurality of bridge portions 15 and , it maintains a connection with some other part. After forming the machined body 11 and the bridge 15 in the outer punching step S2, the machined body 11 maintains a state connected to the edge 16 by the four bridges 15, , while the trimming step (S7-2), the processing body 11 is maintained in a state of connection with the edge portion 16 only by one bridge portion 15.

The edge of the processing body 11 has a circular shape, and the edge of the flange 14 constituting the product 20 has a shape other than a circular shape. By forming the processing body part 11 in a circular shape, the cylindrical part 12, the central hole part 13, and the flange part 14 can be formed on concentric circles based on the central part, and the trimming step (S7-) In 2), by punching the edge of the flange portion 14 into a desired shape, the flange portion 14 can be deformed and molded into various other shapes.

8 is a plan view and a cross-sectional view schematically showing the processing state of the material according to the product separation step and the scrap cutting step of the method for manufacturing an eco-friendly three-dimensional shape press part according to an embodiment of the present invention, and FIG. It is a plan view and a cross-sectional view schematically showing a three-dimensional shape part manufactured according to a manufacturing method of an environmentally friendly three-dimensional shape press part according to an embodiment.

1 and 8, the product separation step (S8) according to an embodiment of the present invention includes a third striking step (S8-1) and a boundary section cutting step (S8-2).

In the third striking step ( S8 - 1 ), the flange portion 14 and the bridge portion 15 are pressed to correct the dimensions of the flange portion 14 and the bridge portion 15 . The flange portion 14 and the bridge portion 15 are flatly pressed, ie, struck, and the dimensions of the flange portion 14 and the flange portion 14 and the bridge portion 15 that are deformed during the entire process are measured, for example. For example, the thickness and flatness are corrected.

In flatly pressing the flange portion 14 and the bridge portion 15 , the portion corresponding to the cylindrical portion 12 of the upper die 31 is inserted into the flange portion 14 while sandwiching the upper portion of the cylindrical portion 12 . As corresponding parts, the flange portion 14 and the bridge portion 15 are pressed downwardly toward the lower die 32 . Accordingly, the flatness of the flange portion 14 and the bridge portion 15 can be corrected while stably maintaining the shape of the cylindrical portion 12 .

In the boundary cutting step (S8-2), the product 20 is separated from the material 10 by cutting the boundary between the bridge portion 15 and the flange portion 14 . By cutting the boundary between the bridge part 15 and the flange part 14, the shape processing of the machining body part 11 is completed while going through the flange forming step (S7). That is, the processing body 11 has the shape of the target product 20 . By cutting the boundary portion between the bridge portion 15 and the flange portion 14, the processing body portion 11 having a structure including the cylindrical portion 12 and the flange portion 14, that is, the product 20 is a material. is separated from (10).

The product 20 separated from the material 10 through the boundary section cutting step (S8-2) goes through a post-process of removing the portion corresponding to the post-processing removal unit 126, and finally in the form shown in FIG. is completed Using the flat strip material 10, the flange portion 14 and the cylindrical portion 12 are connected to the three-dimensional product 20, for example, the width (diameter) of the flange portion 14 is 48mm, cylindrical The product 20 having a total height of 12 mm including the portion 12 and the flange portion 14 may be manufactured.

The product 20 manufactured according to the method for manufacturing an eco-friendly three-dimensional press part according to the present invention is a secondary plate part for an actuator that improves fuel efficiency and reduces exhaust gas, more specifically, it is applied to the chain cover of the engine camshaft. It is attached and can be applied as a component of a flow path switchgear that adjusts CVVT (Continuously Variable Valve Timing) variable intake air.

In the scrap cutting step (S9), after the product 20 is separated, the front end of the material 10 having a shape in which only the bridge portion 15 and the edge portion 16 remain is set to a set length. (d) Cut in units. The cutting position of the scrap (S) is cut by the cutting device so as to secure a safe distance that does not interfere with the cutting device for cutting the boundary between the bridge part 15 and the flange part 14, and the processing body part 11 It is preferable to be positioned in front of the second outer hole part 19 that is positioned in front of the processing body part 11 in which this is made.

According to the manufacturing method of an eco-friendly three-dimensional press part according to an embodiment of the present invention having the configuration as described above, the material 10 in the form of a strip is punched to form the processing body 11 and the bridge part 15, , After drawing the processing body part 11 in a shape in which the flange part 14 is connected to the end of the cylindrical part 12, and punching the center hole part 12 on the cylindrical part 12, the processing body part 11 ) is drawn more precisely and the product of a three-dimensional shape including the cylindrical part 12 and the flange part 14 while continuously passing through the process of cutting the boundary between the bridge part 15 and the flange part 14 ( 20) can be continuously mass-produced.

In addition, according to the present invention, a product having a three-dimensional shape in which the cylindrical portion 12 and the flange portion 14 are connected by press forming, such as drawing, punching, etc., without cutting the flat strip material 10 . It is possible to implement a cutting-free press molding automation technology optimized for the molding of (20).

In addition, according to the present invention, each time the material 10 having a strip shape is moved by a set length d unit, one product 20 can be manufactured, and a large amount of the material 10 can be produced in proportion to the movement amount of the material 10 . The product 20 can be manufactured continuously, so that productivity can be further improved, and it can be molded to precise dimensions through drawing and precision drawing processes, thereby reducing the defect rate, and improving the rigidity of the product due to the tempering effect. can

So far, the present invention has been focused on the embodiments. Those of ordinary skill in the art to which the present invention pertains will understand that the present invention may be implemented in a modified form without departing from the essential characteristics of the present invention. Therefore, the disclosed embodiments are to be considered in an illustrative rather than a restrictive sense. The scope of the present invention is indicated in the claims rather than the foregoing description, and all differences within the scope equivalent thereto should be construed as being included in the present invention.

10: Material 11: Machining body part
12: cylindrical part 13: central hole part
14: flange portion 15: bridge portion
16: edge portion 17: fixing hole portion
18: first outer hole portion 19: second outer hole portion
20: product 121: circumference
122: bottom 123: corner
124: inner corner 125: outer corner
141: auxiliary hole 171: first fixing hole
172: second fixing hole 181: left outer hole
182: right outer hole portion 191: rear outer hole portion
192: front outer hole part 193: bridge extension hole part
194: 1st extension hole part 195: 2nd extension hole part
196: 3rd extension hole part 197: 4th extension hole part

Claims (20)

A material supply step of supplying a material in the form of a strip;
an outer punching step of perforating the material so that a processing body portion and a bridge portion connecting the processing body portion with the edge portion of the material are formed in the middle portion in the width direction of the material;
a drawing step of drawing the machining body to have a shape connected to a flange portion at an end of the cylindrical portion;
a central hole punching step of forming a central hole in the central part of the cylindrical part;
a precision drawing step of drawing the machining body to have a smaller amount of deformation in the drawing step; and
A product separation step of separating a product having a structure including the cylindrical portion and the flange portion from the material by cutting a boundary portion between the bridge portion and the flange portion; .
According to claim 1,
The material supply step is,
a continuous supply step of continuously supplying the material in units of a set length; and
A method of manufacturing an eco-friendly three-dimensional press part comprising a; a first piercing step of forming a fixing hole portion into which the pin portion of the processing device is fitted in the edge portion of the material.
3. The method of claim 2,
The fixing hole portion,
a first fixing hole formed on one side of the material in the width direction and disposed at intervals corresponding to the set length along the length direction of the material; and
A second fixing hole portion formed on the other side in the width direction of the material, and disposed symmetrically with the first fixing hole portion based on the middle portion in the width direction of the material; .
According to claim 1,
The outer punching step is,
a first outer punching step of forming a first outer hole having a shape extending along a part of an edge of the processing body; and
and a second outer punching step of forming a second outer hole having a shape extending along another part of the edge of the processing body.
5. The method of claim 4,
The first outer hole portion,
a left outer hole formed to extend along an outer periphery of the processing body located on one side in the width direction of the material; and
The method of manufacturing an eco-friendly three-dimensional press part comprising a; a right outer hole formed to extend along the outer periphery of the processing body located on the other side in the width direction of the material.
6. The method of claim 5,
The processing body has a circular shape,
The method of manufacturing an eco-friendly three-dimensional press part, characterized in that the first outer hole portion and the second outer hole portion are formed to extend in an arc shape, and are formed symmetrically with respect to the center of the machining body portion.
6. The method of claim 5,
The second outer hole portion,
a rear outer hole portion formed to extend along an outer periphery of the processing main body between the left outer hole portion and the right outer hole portion and positioned on the same width direction extension line as the fixing hole portion formed in the edge portion of the material; and
The method of manufacturing an eco-friendly three-dimensional press part comprising a; a front outer hole portion formed symmetrically with the rear outer hole portion based on the front end of the rear outer hole portion.
8. The method of claim 7,
The second outer hole portion,
A bridge extension hole formed to extend between the fixing hole and the first outer hole in the rear outer hole and the front outer hole, and forming the bridge part Way.
9. The method of claim 8,
The bridge extension hole portion,
a first extension hole portion formed to extend between the left outer hole portion and a rear end portion of the fixing hole portion at the end of the rear outer hole portion located on one side in the width direction of the material;
a second extension hole portion formed symmetrically with the first extension hole portion based on a right end of the rear outer hole portion;
a third extension hole portion formed to extend between the right outer hole portion and the rear end portion of the fixing hole portion at the end of the rear outer hole portion located on the other side in the width direction of the material; and
A method of manufacturing an eco-friendly three-dimensional press part comprising a; a fourth extension hole portion formed symmetrically with the third extension hole portion based on the right end of the rear outer hole portion.
According to claim 1,
The drawing step is
a first drawing step of drawing the processing body in the shape of a concave container having an inclined perimeter;
a second drawing step of drawing such that the radius of curvature of the corner portion is smaller while the peripheral portion has a steeper inclination; and
and a fourth drawing step of drawing such that the radius of curvature of the corner is smaller while the peripheral portion extends in the vertical direction.
11. The method of claim 10,
The drawing step is
After the second drawing step, the third drawing step of drawing the perimeter portion having a steeper inclination and the corner portion having a smaller radius of curvature; the method of manufacturing an eco-friendly three-dimensional shape press part, characterized in that it further comprises .
11. The method of claim 10,
The drawing step is
Between the first drawing step and the second drawing step, a first idle step of pausing the drawing of the material for a set time; Manufacturing of eco-friendly three-dimensional press parts, characterized in that it further comprises Way.
According to claim 1,
The precision drawing step is
a first precision drawing step of drawing such that the radius of curvature of the inner edge of the cylindrical portion is smaller, and drawing with a relatively smaller deformation amount than in the drawing step;
a second precision drawing step of drawing so that the radius of curvature of the inner edge of the cylindrical part is smaller; and
A method of manufacturing an eco-friendly three-dimensional press part comprising a; a third precision drawing step of drawing the inner edge of the cylindrical part to have a smaller radius of curvature.
14. The method of claim 13,
The precision drawing step is
After the third precision drawing step, a second idle step of maintaining the material in a resting state for a set time; the method of manufacturing an eco-friendly three-dimensional shape press part, characterized in that it further comprises.
According to claim 1,
After the precision drawing step, an auxiliary hole punching step of forming an auxiliary hole portion in the flange portion; Eco-friendly three-dimensional shape press part manufacturing method further comprising a.
16. The method of claim 15,
The auxiliary hole punching step is
a first striking step of correcting a dimension of the flange portion by pressing the flange portion; and
A second piercing step of forming the auxiliary hole portion in the flange portion; eco-friendly three-dimensional press part manufacturing method comprising a.
According to claim 1,
After the precision drawing step, the flange forming step of cutting the edge of the flange portion while maintaining the connection with the bridge portion and processing the flange portion into a desired shape; Eco-friendly three-dimensional shape press comprising a further comprising A method of manufacturing a part.
18. The method of claim 17,
The flange forming step is,
a second striking step of correcting the dimensions of the flange portion by pressing the flange portion; and
A trimming step of cutting the edge of the flange portion to process the flange portion into a desired shape, separating the flange portion from some of the plurality of bridge portions, and maintaining a connection state with other portions; including A method of manufacturing an eco-friendly three-dimensional press part, characterized in that
According to claim 1,
The product separation step is
a third striking step of correcting dimensions of the flange part and the bridge part by pressing the flange part and the bridge part; and
and a boundary cutting step of cutting the boundary between the bridge portion and the flange portion to separate the product from the material.
According to claim 1,
The scrap cutting step of cutting the end of the material from which the product is separated in units of a set length; Eco-friendly three-dimensional shape press part manufacturing method, characterized in that it further comprises.

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