KR20080098900A - Terminal forming apparatus and method - Google Patents

Abstract

A device and an apparatus for forming a terminal are provided to form a spring unit of the terminal more accurately including an elastic unit which is extended toward a reverse direction in parallel with an extension direction of a base. A lower holder(20) comprises a lower retainer(24). An upper holder(120) comprises an upper retainer(122). The upper retainer is installed at the upward of the lower holder. The first bend die(32) and the first bend punch(132) are installed at the location corresponding to of the upper retainer and lower retainer. And the first bend die and the first bend punch are bent with regard to the first bend portion and the second bend portion of a spring unit at a predetermined angle. The second bend die(36) and the second bend punch(138) are installed at the location corresponding to of the upper retainer and lower retainer. And the second bend die and the second bend punch bend the second bent portion at a predetermined angle about an elastic unit.

Description

Terminal forming apparatus and method

1 is a plan view showing the configuration of a strap that a plurality of terminals are connected to the carrier.

Figure 2 is a cross-sectional view showing that the spring portion of the terminal cut along the line AA 'of FIG.

Figure 3 is a cross-sectional view showing the configuration of a preferred embodiment of a terminal forming apparatus according to the present invention.

4 is an explanatory view sequentially showing that the spring portion of the terminal is formed in the device according to the present invention.

Figure 5 is a cross-sectional view sequentially showing the shape in which the spring portion of the terminal is formed in the device according to the invention.

Explanation of symbols on the main parts of the drawings

1: carrier 2: terminal

3: body portion 4: barrel portion

5: coupling part 6: spring part

10: base 12: elastic portion

14: second bent portion 16: the first bent portion

20: Lower holder 22: Backing plate

24: Lower retainer 26: Die pocket

30: swaging die 32: first bending die

34: bending surface 36: second bending die

38: die slope 40: die protrusion

42: base die 44: elastic portion support protrusion

46: Base bending interlocking surface 48: Guide block

50: bending cam 52: first bending cam

54: cam die slope 56: Daiyo groove

58: second bending cam 60: cam slope

62: protrusion punch 64: interlocking slope

66: spring forming die 68: adjusting die

120: upper holder 120: backing plate

124: upper retainer 126: punch pocket

130: swaging punch 132: first bending punch

134: curved projection 136: bending interlocking surface

138: second bending punch 140: punch slope

142: base punch 144: base bending surface

146: interference prevention groove 148: driving punch

150: driving slope 152: spring forming punch

154: spring bending portion 156: adjustment punch

158: slope

The present invention relates to a terminal forming apparatus and method, and more particularly to a terminal forming apparatus and method for bending by forming a spring portion of the terminal at an acute angle.

Terminals are generally used for connectors, and the male and female terminals provided in the tip of the wire and installed inside each connector are coupled to each other to perform electrical connection between the connectors. The terminal has a barrel portion for connecting to the wire at the rear end and a coupling portion for coupling with the mating terminal is provided at the front end. Coupling portions of such terminals have various shapes for coupling of the male and female terminals. Recently, there is a need for a terminal having a variety of functions while forming a spring portion having elasticity in the coupling portion of the terminal.

In general, a terminal cuts a strip-shaped material having a predetermined width into a predetermined shape, and is sequentially bent to make a required shape. This bending process is generally performed in a molding apparatus called a progressive mold, in which the punch presses the material while the punch moves up and down with respect to the die to perform bending.

In progressive molds, a terminal is produced with a strap that is connected to the carrier at regular pitch intervals. In the progressive mold, a plurality of dies and punches are installed to correspond to each other at a predetermined pitch interval so that the work is sequentially performed on each part of the strap so that the terminal can be finally manufactured. Here, the terminal refers to the final product, but in the present specification, the part that will be the terminal, that is, the part of the strap on which work has not yet been completed, is also referred to as a terminal for convenience.

Recently, especially as the coupling portion of the terminal has various functions, its configuration tends to be very complicated. Therefore, making the coupling portion of the terminal more accurate and robust is one of the tasks of the skilled person.

The present invention is to solve the conventional problems as described above, an object of the present invention is to form a terminal of the spring portion of the terminal having an elastic portion extending in the opposite direction approximately parallel to the extending direction of the base more easily and accurately It is to provide an apparatus and method.

According to a feature of the present invention for achieving the above object, the present invention is a terminal forming apparatus for forming a terminal having a spring portion extending in the direction opposite to the extension direction of the base, the lower mold retainer is provided A lower holder; An upper mold holder provided above the lower mold holder and being relatively lifted with respect to the lower mold holder and provided with an upper mold retainer; A swaging die and a swaging punch installed at positions corresponding to the lower retainer and the upper retainer, respectively, to process the spring portion flat; A first bending die and a first bending punch installed at positions corresponding to the lower retainer and the upper retainer, respectively, for bending the first bent portion of the spring portion at a predetermined angle with respect to the second bent portion; A second bending die and a second bending punch installed at positions corresponding to the lower retainer and the upper retainer, respectively, for bending the second bent portion at a predetermined angle with respect to the elastic portion; A base die and a base punch installed at positions corresponding to each of the lower mold retainer and the upper retainer, respectively, for bending the elastic part at an angle of 90 degrees with respect to the base; A bending cam and a driving punch installed at positions corresponding to each other of the lower mold retainer and the upper mold retainer to bend the elastic portion at an acute angle with respect to a base; The lower mold retainer and the upper retainer are respectively provided at positions corresponding to each other, and include a spring portion forming die and a spring portion forming punch for bending the elastic portion to extend in a direction opposite to the extending direction of the base.

The first bending die has a bent surface having a rounded corner shape at one end thereof, and a curved protrusion is formed at one end of the first bending punch, and the bending interlock is formed to correspond to the bent surface inside the curved protrusion. A curved surface is formed concave from the tip of the curved projection to the surface of the first curved punch.

A die inclined surface is formed to be inclined with respect to the horizontal direction in the second bending die, and a die protrusion is extended to be parallel to the horizontal surface at a portion where the die inclined surface ends, and the second bent punch has a punch inclined surface corresponding to the die inclined surface. Is formed.

The base die has an elastic part supporting protrusion formed to protrude on the surface of the base die, and a base bending interlocking surface extends concave from the upper end of the elastic part supporting protrusion to the surface of the base die inside the elastic part supporting protrusion. The base punch has a base bent surface roundly formed at one corner of the base punch, and an interference prevention groove is formed at an upper portion of the base bent surface.

An adjustment die and an adjustment punch are further provided at respective positions of the lower mold retainer and the upper mold retainer passing through the spring portion forming die and the spring portion forming punch to respectively bend the elastic portion with respect to the base.

According to another feature of the invention, the present invention is a terminal forming apparatus for forming a terminal having a spring portion in which the elastic portion extends in a direction opposite to the extension direction of the base, the first step of flat swaging the spring portion of the terminal Wow; A second step of bending the first bent portion of the spring portion at a predetermined angle with respect to the second bent portion; A third step of bending the second bent portion of the spring portion at a predetermined angle with respect to the elastic portion; A fourth step of bending the elastic portion of the spring portion at an angle of 90 degrees with respect to a base; A fifth step of bending the elastic portion of the spring portion to form an acute angle with respect to a base; And a sixth step of bending the elastic portion of the spring portion to extend in a direction opposite to the extension direction of the base.

After the sixth step, the seventh step of preventing the deformation of the elastic part by springback is further performed by bending the elastic part with respect to the base.

According to the terminal forming apparatus and method according to the present invention having such a configuration, it is possible to more easily and accurately form the spring portion of the terminal is provided with an elastic portion extending in the opposite direction approximately parallel to the extension direction of the base quality of the terminal This has the advantage of being higher.

Hereinafter, a preferred embodiment of a terminal molding apparatus according to the present invention having the configuration as described above will be described in detail with reference to the accompanying drawings.

FIG. 1 is a plan view showing the configuration of a strap in which a plurality of terminals are connected to a carrier, and FIG. 2 is a cross-sectional view showing the completion of a spring portion of a terminal cut along the line AA ′ of FIG. 1. 3 shows a schematic cross-sectional view of a terminal forming apparatus according to the present invention.

First, referring to Figures 1 and 2, looks at the configuration of the terminal made in the terminal forming apparatus according to the present invention. The terminal strap means that the terminal 2 is connected to the carrier 1 at a constant pitch interval. The terminal 2 is provided with a barrel portion 4 at one end of the body portion 3, the coupling portion 5 is provided at the other end of the body portion 3 that is opposite to the barrel portion (4). The other end of the coupling portion 5 opposite to the body portion 3 is provided with a spring portion 6.

The body portion 3 is a portion forming the skeleton of the terminal 2, and is not actually a clearly divided portion of the barrel portion 4 and the coupling portion (5). The barrel portion 4 is a portion that is connected to the wire, the coupling portion 5 is a portion that is coupled to the mating terminal (2).

A cross-sectional view of the spring portion 6 corresponding to the line AA ′ of FIG. 1 is shown in FIG. 2. The state of FIG. 2 is a state in which the spring part 6 of the terminal 2 is completed. The base 10 here forms the bottom of the spring part 6. One end of the base 10 is formed by bending the elastic portion 12 at an acute angle with the surface of the base 10. The extending direction of the elastic part 12 is substantially opposite to the extending direction of the base 10. At the other end of the elastic portion 12 opposite to the base 10, a second bent portion 14 is formed by bending a predetermined angle with respect to the elastic portion 12. At the other end of the second bent portion 14 opposite to the elastic portion 12, the first bent portion 16 is formed at a predetermined angle with respect to the second bent portion 14.

Meanwhile, referring to FIG. 3, a preferred embodiment of a terminal forming apparatus for forming a spring portion of a terminal of the type shown in FIGS. 1 and 2 will be described.

On the lower mold holder 20, the backing plate 22 and the lower mold retainer 24 are mounted. The backing plate 22 and the lower mold retainer 24 are fastened together on the lower mold holder 20. The backing plate 22 may be considered to be substantially part of the lower mold retainer 24. The die pocket 26 is formed in the lower mold retainer 24 to be opened upward. A plurality of die pockets 26 are formed in the lower mold retainer 24 at predetermined pitch intervals. For reference, the lower mold retainer 24 may have a substantially rectangular plate shape, and a plurality of lower mold retainers 24 may be provided in the entire progressive mold.

A swaging die 30 is installed in one of the die pockets 26 of the lower mold retainer 24. The swaging die 30 is formed to have a larger width than that when the spring portion 6 is in an unfolded state. The swaging die 30 serves to support the terminal 2 at the time of flattening the spring portion 6 which is not yet bent.

A first bending die 32 is installed in the die pocket 26 adjacent to the swaging die 30. A bent surface 34 is formed on one surface of the first bending die 32. The bent surface 34 extends gradually from the inner side of the surface of the first bending die 32 to the outward downward direction, and finally has rounded corners. The portion to be the first bent portion 16 is bent by a predetermined angle with respect to the portion to be the second bent portion 14 by the bent surface 34.

A second bending die 36 is installed in the die pocket 26 adjacent to the first bending die 32. On the second bending die 36, a die inclined surface 38 is formed to be inclined with respect to the horizontal direction from the middle of the surface of the second bending die 36 to the outside. The die protrusion 40 extends parallel to the horizontal plane at the portion where the die slope 38 ends. The first bent portion 16 of the spring portion 6 is positioned on the flat surface of the die protrusion 40. The portion to be the second bent portion 14 is bent by a predetermined angle with respect to the portion to be the elastic portion 12 by the die inclined surface 38.

A base die 42 is installed in the die pocket 26 adjacent to the second bending die 36. At one end of the base die 42, an elastic portion supporting protrusion 44 is formed to protrude on the surface of the base die 42. Inside the elastic support protrusion 44, the base bending interlocking surface 46 is concave so that the inclination gradually decreases with respect to the horizontal plane from the upper end of the elastic support support protrusion 44 to the surface of the base die 42. Is extended. The portion to be the elastic portion 12 is bent by a predetermined angle with respect to the portion to be the base 10 by the base bending interlocking curved surface 46.

Guide blocks 48 are provided at both sides of the die pocket 26 adjacent to the base die 42. A bending cam 50 is installed in the space between the guide blocks 48, and the bending cam 50 is composed of a first bending cam 52 and a second bending cam 58. The first bending cam 52 and the second bending cam 58 perform a linear reciprocating motion between the guide blocks 48.

On the inner upper end of the first bending cam 52, the cam die inclined surface 54 is inclined in the inner downward direction. A die groove 56 is recessed in the lower portion of the cam die slope 54. The upper surface of the die groove 56 is inclined with respect to the horizontal plane is connected to one surface of the cam die inclined surface 54. The lower surface of the die groove 56 extends to the inner surface of the first bending cam 52 in parallel with the horizontal plane.

On the inner upper end of the second bending cam 58, the cam inclined surface 60 is inclined in the inner downward direction. At the end of the cam inclined surface 60, the protruding punch 62 is formed to correspond to the die groove 56. An upper surface of the protruding punch 62 extends toward the cam inclined surface 60 to be inclined with respect to the horizontal plane and is connected to one surface of the cam inclined surface 60. An upper surface of the protruding punch 62 may extend horizontally near the cam inclined surface 60. The lower surface of the protruding punch 62 extends to the inner surface of the second bending cam 58 so as to be parallel to the horizontal plane.

Spring mounting portions (not shown) are formed at both ends of the first bending cam 52 and the second bending cam 58, which face each other. The spring seating portion is formed to be recessed to serve to support the end of the restoring member 63 to be described below.

The first bending cam 52 and the second bending cam 58 are supported in a direction away from each other by the restoring member 63. That is, normally, the first bending cam 52 and the second bending cam 58 are spaced apart by the restoring force of the restoring member 63. Both ends of the restoring member 63 are supported by a spring seating portion of the bending cam 50.

Meanwhile, interlocking slopes 64 are formed at both ends of the first bending cam 52 and the second bending cam 58 in the longitudinal direction, respectively. The interlocking slope 64 is in contact with the driving punch 148 to be described below to guide. The upright wall punch is guided along the interlocking slope 64 so that the bending cam 50 is linearly moved. When the base 10 and the elastic portion 12 are bent at a predetermined angle by the movement of the bending cam 50, the first bending portion 16 of the spring portion 6 is the second bending cam. It does not interfere with the cam slanting surface 60 formed at 58.

The die pocket 26 adjacent to the guide block 48 is provided with a spring forming die 66. The spring portion forming die 66 is formed to have a flat top surface having a width such that the base 10 can be mounted.

The die pocket 26 adjacent the spring forming die 66 is provided with an adjusting die 68. The adjusting die 68 is also formed to have a flat top surface having a width such that the base 10 can be mounted.

The upper mold holder 120 is provided on the upper portion of the lower mold holder 20 to be relatively lifted relative to the lower mold holder 20. A backing plate 122 and an upper retainer 124 are installed on the lower surface of the upper holder 120. The upper holder 120 is lifted by a separate device. The backing plate 122 and the upper retainer 124 are mounted together on the upper holder 120. In fact, the backing plate 122 may be regarded as part of the upper retainer 124.

A plurality of punch pockets 126 are formed in the upper retainer 124, and punch holes 126 are formed in the punch pockets 126 to correspond to the dies 30, 32, 36, 42, 50, 66, and 68, respectively. 130, 132, 138, 142, 148, 152 and 156 are provided. The punches 130, 132, 138, 142, 148, 152, and 156 are driven integrally with the upper holder 120. The punches 130, 132, 138, 142, 148, 152, and 156 are also installed in the upper retainer 124 at regular pitch intervals.

A swaging punch 130 is installed in the punch pocket 126 of the upper retainer 124 to correspond to the swaging die 30. The lower surface of the swaging punch 130 has a width corresponding to the width of the swaging die 30. The lower surface of the swaging punch 130 is formed flat. The swaging punch 130 hits the spring portion 6 of the terminal 2 seated on the swaging die 30 so that the entire spring portion 6 of the terminal 2 is flat.

The first bending punch 132 is installed in the punch pocket 126 of the upper retainer 124 to correspond to the first bending die 32. One end of the first bending punch 132 is formed to protrude a curved projection 134. Inside the curved protrusion 134, the bent interlocking curved surface 136 extends concavely from the tip of the curved protrusion 134 to the surface of the first curved punch 132 so that the inclination gradually decreases with respect to the horizontal plane. The first bending punch 132 cooperates with the bending surface 34 of the first bending die 32 so that the first bending portion 16 of the spring portion 6 becomes the second bending portion 14. Molded to be bent at an angle to the portion.

Next, a second bending punch 138 is installed in the punch pocket 126 of the upper retainer 124 to correspond to the second bending die 36. The second bend punch 138 is formed with a punch inclined surface 140 corresponding to the second bent die 36. The punch inclined surface 140 extends inclined toward an upper side of one side of the second bending punch 138 at approximately the middle of the second bending punch 138. The second bending punch 138 cooperates with the die inclined surface 38 of the second bending die 36 so that the second bending portion 14 of the spring portion 6 becomes the elastic portion 12. Molded to be bent at a predetermined angle with respect to.

A base punch 142 is installed in the punch pocket 126 of the upper retainer 124 to correspond to the base die 42. A base bent surface 144 is formed at one surface of the base punch 142. The base bending surface 144 is rounded at one side edge of the base punch 142. An interference preventing groove 146 is formed at an upper portion of the base bent surface 144. An upper portion of the interference preventing groove 146 is formed to be recessed at a right angle from the side of the base punch 142 and extends inclined to the lower surface of the base punch 142. The interference preventing groove 146 serves to prevent the first bent portion 16 from interfering with the base punch 142. The base punch 142 cooperates with the elastic portion supporting protrusion 44 and the base bending interlocking surface 46 of the base die 42 so that the elastic portion 12 of the spring portion 6 is connected to the base 10. Molded to be bent at a predetermined angle with respect to the portion to be.

The driving punch 148 is installed in the punch pocket 126 of the upper retainer 124 corresponding to the bending cam 50. The driving punch 148 provides a driving force for driving the bending cam 50 and does not directly contact the spring portion 6 of the terminal 2. The driving punch 148 is formed with a driving inclined surface 150 corresponding to the interlocking inclined surface 64 of the bending cam 50. The driving inclined surface 150 is formed to face each other on the lower surface of the driving punch 148, the driving inclined surface 150 of both ends are farther toward the tip.

On the other hand, the spring forming punch 152 is provided in the punch pocket 126 of the upper retainer 124 corresponding to the spring forming die (66). A spring bending portion 154 is formed to protrude from the spring portion forming punch 152. The spring bent portion 154 is formed to be inclined with respect to the horizontal plane. The spring bent portion 154 is molded so that the elastic portion 12 of the spring portion 6 is bent at a desired angle with respect to the portion to be the base 10.

An adjusting punch 156 is provided in the punch pocket 126 of the upper retainer 124 corresponding to the adjusting die 68. An inclined surface 158 is formed on the adjustment punch 156, and the inclined surface 158 is formed to face each other on the lower surface of the adjustment punch 156, and the inclined surfaces 158 at both ends thereof move away from the upper end. The adjustment punch 156 serves to prevent the springback phenomenon by processing the elastic portion 12 one more time. However, the spring back phenomenon may not occur depending on the design conditions such as dimensions, so that the adjusting die 68 and the adjusting punch 156 are not necessarily required.

Hereinafter, the operation (operation) of the terminal forming apparatus according to the present invention having the configuration as described above will be described in detail.

4 is an explanatory view sequentially showing that the spring portion of the terminal is formed in the device according to the invention, Figure 5 is a cross-sectional view sequentially showing the shape of the spring portion of the terminal in the device according to the invention is shown have.

First, referring to FIGS. 4 and 5, a process of forming the spring part 6 of the terminal 2 will be described. Terminal 2 made as in the state of Figure 1 is hit by the swaging punch 130 in a state seated on the swaging die 30 in order to remove and flatten the burrs generated during the operation such as cutting. In this case, the spring part 6 of the said terminal 2 is processed flat, and the burr etc. which generate | occur | produced at the time of cutting | disconnection etc. disappear. This state is shown in FIGS. 4A and 5A.

Next, the first bent portion 16 is bent by a predetermined angle with respect to the portion to be the second bent portion 14 by the first bent die 32 and the first bent punch 132. The angle and shape at which the first bent portion 16 is bent with respect to the second bent portion 14 is determined by the bent surface 34 of the first bent die 32. This state is shown in FIGS. 4B and 5B.

The second bending portion 14 is bent to have a predetermined angle with respect to the elastic portion 12 by the second bending die 36 and the second bending punch 138. The angle formed by the second bent portion 14 with respect to the elastic portion 12 is determined by the angle of the die inclined surface 38 of the second bent die 36. The state worked by the second bending die 36 and the second bending punch 138 is shown in FIGS. 4C and 5C.

Next, the elastic part 12 is bent to have a predetermined angle with respect to the base 10 by the base die 42 and the base punch 142. The angle and shape of the elastic part 12 with respect to the elastic part 12 are determined by the base bending interlocking surface 46 of the base die 42. For reference, the interference preventing groove 146 in the base punch 142 may interfere with the base punch 142 as the first bent portion 16 and the second bent portion 14 are shown in FIG. 4D. To prevent the The working state by the base die 42 and the base punch 142 is shown in Figs. 4d and 5d.

As described above, after the elastic part 12 is bent to have an angle of approximately 90 degrees with respect to the base 10, the elastic part 12 is bent to have an acute angle with the base 10. To this end, when the driving punch 148 is lowered by the upper holder 120, the bending cam 50 is guided by the interlocking slope 64 to the driving slope 150, and the first bending cam 52 is guided to the driving slope 150. ) And the second bending cam 58 are moved to be adjacent to each other while overcoming the elastic force of the restoring member (63).

When the bending cam 50 is moved, the protruding punch 62 strikes the base 10 and the elastic part 12 of the spring part 6 seated in the die groove 56 so that the elastic The portion 12 forms a shape with a predetermined angle with respect to the base 10. The angle and shape of the elastic portion 12 with respect to the base 10 are determined by the die groove 56 and the protruding punch 62. This state is shown in FIGS. 4E and 5E.

Next, in the spring portion forming die 66 and the spring portion forming punch 152, a bending operation is performed such that the base 10 and the elastic portion 12 are substantially adjacent to each other. Since the spring bent portion 154 is formed to have a predetermined inclination, the elastic portion 12 is bent by the inclination of the spring bent portion 154 with respect to the base 10. This state is shown in FIGS. 4F and 5F.

Then, the elastic portion 12 is processed once again using the adjusting die 68 and the adjusting punch 156 so that the elastic portion 12 does not cause a springback phenomenon. Such a state is shown in FIGS. 4G and 5G. For reference, one or more pairs of the adjusting die 68 and the adjusting punch 156 may be used. This is to ensure the processing of the elastic portion 12 more reliably.

The rights of the present invention are not limited to the embodiments described above, but are defined by the claims, and those skilled in the art can make various modifications and adaptations within the scope of the claims. It is self-evident.

According to the terminal forming apparatus and method according to the present invention as described in detail above, the following effects can be expected.

In the present invention, after cutting the flat spring portion of the terminal is completed, the first bent portion of the spring portion is bent, and the second bent portion inside the first bent portion is bent by a predetermined angle with respect to the elastic portion to be molded The part was processed over the third step to be approximately parallel to the base. By processing in this order there is an advantage that it is possible to more easily and accurately form the spring portion of the terminal is provided with an elastic portion extending in the opposite direction approximately parallel to the extension direction of the base.

Claims (7)

In the terminal forming apparatus for molding a terminal having a spring portion in which the elastic portion extends in a direction opposite to the extension direction of the base, A lower mold holder provided with a lower mold retainer; An upper mold holder provided above the lower mold holder and being relatively lifted with respect to the lower mold holder and provided with an upper mold retainer; A swaging die and a swaging punch installed at positions corresponding to the lower retainer and the upper retainer, respectively, to process the spring portion flat; A first bending die and a first bending punch installed at positions corresponding to the lower retainer and the upper retainer, respectively, for bending the first bent portion of the spring portion at a predetermined angle with respect to the second bent portion; A second bending die and a second bending punch installed at positions corresponding to the lower retainer and the upper retainer, respectively, for bending the second bent portion at a predetermined angle with respect to the elastic portion; A base die and a base punch installed at positions corresponding to each of the lower mold retainer and the upper retainer, respectively, for bending the elastic part at an angle of 90 degrees with respect to the base; A bending cam and a driving punch installed at positions corresponding to each other of the lower mold retainer and the upper mold retainer to bend the elastic portion at an acute angle with respect to a base; And a spring portion forming die and a spring portion forming punch installed at respective positions of the lower mold retainer and the upper mold retainer to bend to extend in the opposite direction to the extending direction of the base. According to claim 1, wherein the first bending die is formed with a curved surface having a shape of a rounded corner at one end, the curved projection is formed at one end of the first bending punch is formed, the bending inside the curved projection And a bending interlocking curved surface corresponding to the curved surface is concave from the tip of the curved protrusion to the surface of the first punch. The die bending surface of claim 1, wherein a die inclined surface is formed to be inclined with respect to a horizontal direction, and a die protrusion extends parallel to the horizontal surface at a portion where the die inclined surface ends, and the second bend punch is formed on the die inclined surface. Terminal forming apparatus, characterized in that the corresponding punch inclined surface is formed. The base die of claim 1, wherein an elastic portion supporting protrusion is formed on the surface of the base die, and a base bending interlocking surface is formed at an upper end of the elastic portion supporting protrusion. It extends concave to the surface of the base punch terminal forming apparatus characterized in that the base bent surface is formed rounded at one corner of the base punch, the upper portion of the base bent surface interference interference grooves are formed. 5. The method according to any one of claims 1 to 4, wherein the spring retainer die and the spring retainer are respectively provided at positions corresponding to each other of the lower retainer and the upper retainer, respectively, and the elastic portion is provided with respect to the base. Terminal molding apparatus, characterized in that it further comprises an adjustment die and an adjustment punch bent once. In the terminal forming apparatus for molding a terminal having a spring portion in which the elastic portion extends in a direction opposite to the extension direction of the base, A first step of swaging the spring portion of the terminal flat; A second step of bending the first bent portion of the spring portion at a predetermined angle with respect to the second bent portion; A third step of bending the second bent portion of the spring portion at a predetermined angle with respect to the elastic portion; A fourth step of bending the elastic portion of the spring portion at an angle of 90 degrees with respect to a base; A fifth step of bending the elastic portion of the spring portion at an acute angle with respect to a base; And a sixth step of bending the elastic portion of the spring portion to extend in a direction opposite to the extension direction of the base. 7. The method of claim 6, further comprising, after the sixth step, performing a seventh step of bending the elastic part with respect to the base to prevent deformation of the elastic part by springback.

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