KR960002106B1

KR960002106B1 - Method and apparatus for manufacturing contact holder of press

Info

Publication number: KR960002106B1
Application number: KR1019930028289A
Authority: KR
Inventors: 남기주
Original assignee: 현대전자산업주식회사; 김주용
Priority date: 1993-12-17
Filing date: 1993-12-17
Publication date: 1996-02-10
Also published as: KR950016935A

Abstract

simultaneously bending both edge parts of a product and an elastic wall part in opposite direction in order to correspond to a spring back by a stroke punch and a bending punch respectively mounted at both side of operating mold and fixing mold; bending parts bent in the above step again to prevent a spring back phenomenon; simultaneously bending the side walls in a perpendicular direction to the bottom and the middle part of bottom face in opposite direction to correspond to the spring back ; and normally bending the middle part of the bottom face bent in opposite direction by the stroke punch mounted on the operable mold and the bending punch mounted on the fixing mold. The apparatus continuously produces the contact holder.

Description

Press mold manufacturing method and apparatus therefor

제1도는 컨텍홀더의 측단면도.1 is a side cross-sectional view of a contact holder.

제2a- d도는 본 발명의 장치에 의하여 각 공정순으로 절곡되는 과정을 나타낸 작동도.Figure 2a-d is an operation showing the process of bending in the order of each process by the apparatus of the present invention.

제3a- d도는 프레스 금형상에서 컨텍홀더가 제조되는 과정을 나타낸 평면도.3a-d are plan views illustrating a process of manufacturing a contact holder on a press die.

제4a- d도는 제2도의 컨텍홀더의 절곡 과정만을 발췌한 측면도.4a-d are side views showing only the bending process of the contact holder of FIG.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 가동측 금형 2 : 고정측 금형1: movable side mold 2: fixed side mold

3a : 컨텍홀더 11 : 역방향 타격펀치3a: contact holder 11: reverse blow punch

12a : 탄성벽 타격펀치 12b : 고리부 타격펀치12a: elastic punching punch 12b: ring punching punch

13 : 측벽 타격펀치 14 : 바닥면 타격펀치13 side punch punch 14 bottom punch punch

21,22,23,24 : 절곡펀치21,22,23,24: Bending Punch

본 발명은 누전차단기, 릴레이 등에 장착되는 컨텍홀더용 프레스 금형에 관한 것으로, 특히 스프링 백을 역이용하여 4공정을 거쳐 절곡하는 동시에 4개의 제품을 동시 절곡시키면서 순차적으로 1공정씩 이동시켜 컨텍홀더를 연속적으로 제조하도록 한 프레스 금형의 컨텍홀더 제조방법 및 그 장치에 관한 것이다.The present invention relates to a press mold for a contact holder mounted on an earth leakage breaker, a relay, and the like. In particular, the contact holder is continuously moved by one step while simultaneously bending four products while simultaneously bending through four steps using a spring back. It relates to a contact holder manufacturing method of a press die and a device for producing the same.

누적차단기, 릴레이 등에 장착되는 컨텍홀더(3a)는 대략 U자형으로써 그 단면형상은 제1도와 같이 평탄한 바닥면(34)과 그 바닥면(34)에서 직각으로 상향 절곡된 측벽(33)과, 상기 측벽(33)의 중간부에서 상호 대칭되게 내측으로 5.3°의 예각으로 다시 절곡된 탄성벽(32)과, 양측 탄성벽(32)의 끝단에서 다시 내측으로 대칭되게 ∩자형으로 절곡된 고리부(31)로 구성되어 있다.The contact holder 3a mounted on the accumulator circuit breaker, the relay, etc. is substantially U-shaped, and its cross-sectional shape is a flat bottom surface 34 as shown in FIG. 1 and a sidewall 33 bent upwardly at right angles from the bottom surface 34, The elastic wall 32 bent again at an acute angle of 5.3 ° inwardly symmetrically in the middle of the side wall 33, and the ring portion bent in a U-shape symmetrically inwardly again at the ends of both elastic walls 32. It consists of 31.

그런데 상기 바닥면(34)과 양측의 측벽(33), 양측의 탄성벽(32) 및 양측 고리부(31)의 각 경계부인 절곡 부분이 스프링백에 의하여 원래의 형태로 되돌아가려는 성질이 발생하여 규격품의 컨텍홀더를 제작하기 어려운 실정이었다.However, the bent portions, which are the respective boundary portions of the bottom surface 34 and the side walls 33 on both sides, the elastic walls 32 on both sides, and the annular rings 31 on both sides, are caused to return to their original form by spring back. It was difficult to manufacture a contact holder of a standard product.

특히, 직각으로 절곡하는 부분보다 예각으로 절곡된 부분에서 스프링백의 성질이 더욱 두드러지게 나타나서 그 예각부분의 절곡시에는 캠구조를 이용하여 절곡시켜 왔는데, 이 경우 캠구조로 인한 구조의 복잡화로 금형의 제작비 및 대량생산에 필요한 설비비가 크게 들게 되는 문제점이 발생하게 되었다.In particular, the springback property is more prominent at the acute angles than at the angled angles, and the bending of the acute angles has been carried out using a cam structure. There is a problem that the production cost and equipment cost required for mass production is large.

본 발명은 이러한 종래의 문제점을 해결하고자 하는 것으로, 가동측 및 고정측 금형의 절곡위치에 맞도록 상호 대응하는 형상의 역방향 타격펀치, 절곡펀치 등을 4곳에 걸쳐서 설치한뒤, 제1공정시에는 스프링백에 대비하여 역방향으로 탄성벽을 절곡시키는 동시에 고리부도 부분절곡하고, 제2공정시에는 역방향으로 절곡된 탄성벽을 설정된 정상 예각으로 다시 절곡시켜 스프링백 현상을 방지하는 동시에 부분절곡된 고리부를 정상적인 형상으로 절곡시키며, 제3공정에서는 양 측벽을 정상적으로 직각이 되게 절곡시키는 동시에 바닥면의 중간부를 스프링백에 대비하여 역방향으로 절곡시키고, 제4공정에서는 역방향으로 절곡된 바닥면을 평탄하도록 다시 정상적으로 절곡시켜 완제품의 컨텍홀더를 제조하고, 각 공정으로 이동하면서 순차적으로 절곡하면서 연속적으로 제조되도록 하므로써, 금형구조가 간단하여 금형제작비 및 대량생산에 필요한 설비비를 현저하게 절감시키고자 하는데 그 목적이 있다.The present invention is to solve such a conventional problem, after the installation of the reverse blow punch, bending punch and the like of four corresponding shapes to match the bending position of the movable side and the fixed side mold in four places, the first step In the second process, the annular wall is bent at the same time as the springback, and at the same time, the annular part is bent again. In the second process, the elastic wall bent in the reverse direction is again bent at the set normal acute angle to prevent the springback phenomenon. Bending to the normal shape, in the third process is to bend the right side wall to the right angle at the same time, while the middle portion of the bottom surface is bent in the reverse direction in preparation for the spring back, and in the fourth process it is normal again to flatten the bottom surface bent in the reverse direction It is bent to manufacture the contact holder of the finished product, and it is sequentially cut while moving to each process. By so to manufacture continuously, and the mold structure is simplified to significantly reduce the equipment cost required for the metal mold manufacturing cost, and mass production and it is an object character.

이하 본 발명을 첨부도면에 의하여 상세히 설명한다.Hereinafter, the present invention will be described in detail by the accompanying drawings.

가동측 금형(1)과 고정측 금형(2)의 양측에 역방향 타격펀치(11)와 절곡펀치(21)를 각각 설치하여 제품(3)의 양 끝단에 고리부(31)가 각각 형성되게 부분적으로 절곡시키는 동시에 스프링백에 대응하도록 탄성벽(32)을 역방향으로 절곡시키는 제1공정(제1공정부)과 ; 가동측 금형(1)의 양측에는 각각 별도로 작동되는 탄성벽 타격펀치(12a)와 고리부 타격펀치(12b)를 설치하고, 고정측 금형(2)에는 정상적인 탄성벽(32)과 고리부(31)를 절곡하는 절곡펀치(22)를 설치하여 부분절곡된 고리부(31)를 정상적인 형상으로 절곡시키는 동시에 역방향으로 절곡된 탄성벽(32)을 설정된 정상 예각으로 다시 절곡시켜 스프링백현상을 방지하는 제2공정(제2공정부)과 ; 가동측 금형(1)과 고정측 금형(2)에 측벽 타격펀치(13)와 절곡펀치(23)를 각각 설치하여 양쪽의 측벽(33)이 바닥면(34)에 대해 직각으로 절곡되게 하는 동시에 스프링백에 대응하여 바닥면(34)의 중간부를 역방향으로 절곡시키는 제3공정(제3공정부)과 ; 가동측 금형(1)에는 바닥면 타격펀치(14)를 설치하고, 고정측 금형(2)에는 절곡펀치(24)를 설치하여 역방향으로 절곡된 바닥면(34)의 중간부를 다시 정상적으로 평탄하게 절곡시키는 제4공정(제4공정부)으로 이루어진 것으로써, 각 공정은 소재를 순차적으로 이동시키면서 연속적으로 이루어져 컨텍홀더(3a)가 제조되도록 하는 것이 본 발명의 특징이다.Reverse punching punches 11 and bending punches 21 are respectively provided on both sides of the movable die 1 and the fixed die 2 so that the hook portions 31 are formed at both ends of the product 3, respectively. A first step (first step portion) of bending the elastic wall 32 in a reverse direction so as to be bent in a reverse direction and corresponding to spring back; On both sides of the movable side mold 1, elastic wall striking punches 12a and annular striking punches 12b are provided, respectively, and the stationary side mold 2 has a normal elastic wall 32 and a ring portion 31. By installing a bending punch 22 to bend the bent ring portion 31 in a normal shape while bending the elastic wall 32 bent in the reverse direction at a set normal acute angle to prevent the springback phenomenon 2nd process (2nd process part); The side wall punching punch 13 and the bending punch 23 are respectively provided in the movable mold 1 and the fixed mold 2 so that both side walls 33 are bent at right angles to the bottom surface 34. A third step (third step portion) for bending the intermediate portion of the bottom surface 34 in a reverse direction in response to springback; The bottom side punch punch 14 is provided in the movable side mold 1, and the bending punch 24 is installed in the stationary side mold 2, and the middle part of the bottom surface 34 bent in the reverse direction is normally flat again. It is a feature of the present invention that the process is made of a fourth process (fourth process part), and each process is continuously made while sequentially moving the material so that the contact holder 3a can be manufactured.

상기 제1공정(제1공정부)에서는 제2a도 내지 제4a도에 나타낸 바와 같이, 가동측 금형(1)의 역방향 타격펀치(11)는 고리부(31)를 절곡시킨 뒤 상승시에 간섭을 받지 않도록 일부분만 절곡시키는 동시에 탄성벽(32)이 성형되도록 역방향으로 절곡시켜 스프링백을 제거하도록 경사면(111)(112)을 형성하며, 고정측 금형(2)의 절곡펀치(21)는 상기 역방향 타격펀치(11)와 대응되게 형성하여 역방향 타격펀치(11)의 타격시 제품(3)의 양 끝단이 고리부(31)와 역방향 절곡 탄성벽(32)으로 절곡되도록 경사면(211)(212)을 형성한다.In the first step (first step), as shown in Figs. 2A to 4A, the reverse blow punch 11 of the movable side die 1 bends the hook portion 31 and then interferes with the lift. While bending only a portion so as not to be received while bending the reverse direction so that the elastic wall 32 is formed to form the inclined surfaces (111, 112) to remove the spring back, the bending punch 21 of the fixed side mold (2) is the reverse Inclined surfaces 211 and 212 formed so as to correspond to the punching punch 11 so that both ends of the product 3 are bent into the ring portion 31 and the reverse bending elastic wall 32 when the reverse punching punch 11 is hit. To form.

상기 제2공정(제3공정부)에서는 제2b도 내지 제4b도와 같이, 가동측 금형(1)의 탄성벽 타격펀치(12a)와 고리부 타격펀치(12b)를 각각 별도로 작동되도록 하는 동시에 순차적으로 작동시켜 역방향으로 절곡된 탄성벽(32)을 정상적인 예각으로 다시 절곡시킨 뒤, 고리부(31)를 완전한 형태로 절곡하도록 각 펀치(12a)(12b)에 경사면(121a)과 압압면(121b)을 각각 형성하고, 고정측 금형(2)의 절곡펀치(22)는 상기 가동측 금형(1)의 탄성벽 타격펀치(12a)와 고리부 타격펀치(12b)에 대응하여 정상적인 탄성벽(32)과 고리부(31)로 절곡되도록 경사면(221)과 지지턱(222)을 각각 형성한다.In the second process (third process unit), as shown in FIGS. 2B to 4B, the elastic wall impact punch 12a and the ring impact punch 12b of the movable side mold 1 are operated separately and sequentially. After bending the elastic wall 32 bent in the reverse direction at a normal acute angle, the inclined surface 121a and the pressing surface 121b on each punch 12a, 12b to bend the ring portion 31 in a perfect form. ) And each of the bending punches 22 of the fixed side mold 2 corresponds to the elastic wall strike punch 12a and the ring strike punch 12b of the movable side mold 1, respectively. ) And the inclined surface 221 and the support jaw 222 are respectively formed to be bent into the ring portion 31.

상기 제3공정(제3공정부)에서는 제2c도 내지 제4c도와 같이, 가동측 금형(1)의 측벽 타격펀치(13)는 양쪽의 측벽(33)의 절곡과 바닥면(34)의 중간부를 역방향으로 절곡시켜 양 측벽(33)의 스프링백을 제거하도록 하기 위하여 양측면에는 하향경사면(131)을, 저면에는 역 V형 경사홈(132)을 각각 형성하고, 고정측 금형(2)의 절곡펀치(23)는 상기 역 V형 경사홈(132)과 대응되게 산형 경사면 (231)을 형성하는 동시에 절곡펀치(23)가 작동하는 구멍(232)의 상단 주연턱과 하향 경사면(131)으로 양 측벽(33)을 절곡하도록 한다.In the third process (third process portion), as shown in FIGS. 2C through 4C, the side wall impact punch 13 of the movable side mold 1 is bent between the side walls 33 and the bottom surface 34 of both sides. In order to remove the springback of both sidewalls 33 by bending the parts in the reverse direction, downward inclined surfaces 131 are formed on both sides, and inverted V-shaped inclined grooves 132 are formed on the bottom, respectively, and the fixed side mold 2 is bent. The punch 23 forms a mountain inclined surface 231 to correspond to the inverted V-shaped inclined groove 132, and at the same time, the punch 23 is formed at both the upper periphery of the hole 232 for operating the bending punch 23 and the downward inclined surface 131. The side wall 33 is bent.

상기 제4공정에서는 제2도d 내지 제4도d와 같이 가동측 금형(1)의 바닥면 타격펀치(14)는 중간부에 역방향으로 절곡된 바닥면(34)을 평탄하게 압압하도록 저면을 평면으로 형성하고, 고정측 금형의(2)의 절곡펀치(24)는 양 측벽(33)과 바닥면(34)의 경계부인 절곡부분을 받쳐주도록 함과 동시에, 바닥면(34)의 중간부가 평탄하게 펼쳐지도록 평판으로 형성한다.In the fourth step, as shown in FIGS. 2 to 4, the bottom impact punch 14 of the movable side mold 1 has the bottom surface flatly pressed against the bottom surface 34 bent in the middle portion in the reverse direction. It is formed in a planar shape, and the bending punch 24 of the fixed side mold 2 supports the bent portion, which is a boundary between the two side walls 33 and the bottom surface 34, and the middle portion of the bottom surface 34 It is formed into a flat plate so as to unfold evenly.

이와같이 각 공정의 펀치들은 가동측 금형(1) 및 고정측 금형(2)에 일정한 간격으로 설치되어 동시에 작동되는 것으로 제1공정에서 제4공정을 거치면서 순차적으로 절곡되어 컨텍홀더(3a)를 제작하는 것이다.In this way, the punches of each process are installed at a predetermined interval on the movable side mold 1 and the fixed side mold 2 and are simultaneously operated. The punches are sequentially bent while passing through the fourth process in the first process to produce the contact holder 3a. It is.

예컨데, 제1공정부에 의해 절곡된 제품은 제2공정부로, 또 제2공정부에 의해 절곡된 제품은 제3공정부로, 제3공정부에 의해 절곡된 제품은 제4공정부로, 제4공정부에 의해 절곡된 완제품은 프레스 금형의 외부로 배출되고, 또 새로운 제품은 또 제1공정부로 이동되어 상술한 공정을 거치게 되는 것이다.For example, the product bent by the first process unit is the second process unit, the product bent by the second process unit is the third process unit, the product bent by the third process unit is the fourth process unit, and the fourth The finished product bent by the process unit is discharged to the outside of the press die, and the new product is moved to the first process unit to go through the above-described process.

따라서, 각 제품은 동시에 각 공정에 따른 절곡형태로 절곡되는 동시에 연속적으로 이동하면서 절곡되므로 대량생산이 용이하며, 또한 스프링백에 대비하여 미리 절곡하기 어려운 예각 절곡시 미리 역방향으로 절곡시켜 역방향 절곡각도와 설정된 예각 절곡 각도의 합산각도를 크게 부여하여 스프링백을 미리 제거한 뒤 설정된 예각 절곡 각도로 절곡시키도록 하는 것이다.Therefore, each product can be bent in a bending form according to each process at the same time, and bend while moving continuously, so that it is easy to mass production, and also bend backward in advance when acute angle bending is difficult to pre-bending in preparation for springback. By adding a large sum angle of the set acute bend angle to remove the spring back in advance to be bent to the set acute bend angle.

또, 예각으로 절곡하기 용이하도록 역방향으로 절곡시키는 장치가 간단하여 금형제작비 및 대량생산에 필요한 설비비를 현저하게 절감시킬 수가 있는 것이다.In addition, since the apparatus for bending in reverse direction is easy to bend at an acute angle, it is possible to significantly reduce the mold production cost and the equipment cost required for mass production.

Claims

A first step of bending the elastic wall in the opposite direction to correspond to the spring back while partially bending the hooks to be formed at both ends of the product through reverse blow punches and bending punches respectively provided on both sides of the movable mold and the fixed mold; ; The hook part bent in the above shape is normally formed through the elastic wall blow punch and the hook punch punch installed on the both sides of the movable mold and the bending punch installed on the fixed mold to bend the normal elastic wall and the hook. A second step of causing the elastic wall bent in the reverse direction to be bent again at a set normal acute angle to prevent the springback phenomenon; A third step of causing both sidewalls to be bent at right angles to the bottom surface and bending the middle portion of the bottom surface in the reverse direction in response to springback through sidewall blow punches and bending punches respectively provided in the movable mold and the fixed mold; Manufacture of pressec holder of press mold, characterized in that it comprises a fourth step of bending the middle part of the bottom surface bent back to normal through the bottom punch punch installed in the movable mold and the bending punch installed in the fixed mold. Way.

The reverse punching punch 11 and the bending punch 21 are respectively provided on both sides of the movable mold 1 and the fixed mold 2 so that the hook portions 31 are formed at both ends of the product 3, respectively. A first process unit for bending the elastic wall 32 in a reverse direction so as to be bent in a reverse direction and to correspond to a springback; Both sides of the movable side mold 1 are provided with elastic wall striking punches 12a and ring striking punches 12b, which are installed to be operated separately, respectively, and the stationary side mold 2 has a normal elastic wall 32 and a loop portion. Each of the bending punches 22 to allow the 31 to be bent to bend the bent ring portion 31 to the normal shape, and at the same time, the elastic wall 32 bent in the reverse direction again to the set normal acute angle to spring back. 2nd process part which prevents a phenomenon; The side wall punching punch 13 and the bending punch 23 are respectively installed in the movable mold 1 and the fixed mold 2 so that both side walls 33 are bent at right angles to the bottom 34 and at the same time spring back. A third process portion for bending the intermediate portion of the bottom surface 34 in a reverse direction in correspondence with the upper surface; The bottom side punch punch 14 is provided in the movable side mold 1, and the bending punch 24 is installed in the stationary side mold 2, and the middle part of the bottom surface 34 bent in the reverse direction is normally flat again. The contact holder manufacturing apparatus of the press die, characterized in that the fourth process to be arranged at regular intervals.

The reverse punch (11) of the movable side mold (1) of the first process section and the bending punch (21) of the stationary side mold (2) have a ring portion (31) and an elastic wall (32). The inclined surfaces (111) (112) and (211) (212) are formed so as to correspond to each other to bend in the reverse direction, the contact mold manufacturing apparatus of the press die.

The method of claim 2, wherein the second process unit, by operating the elastic wall blow punch 12a and the ring blow punch 12b of the movable side mold 1 in sequence to operate the elastic wall 32 bent in the reverse direction After bending again at an acute angle, an inclined surface 121a and a pressing surface 121b are formed on each of the punches 12a and 12b so as to bend the ring portion 31 to a perfect shape, and the bending punch of the fixed side mold 2 (22), wherein the inclined surface (221) and the support jaw (222) are formed to correspond to the punches (12a, 12b), respectively.

The side wall punching punch 13 of the movable side mold 1 of the third process unit is formed by bending both side walls 33 and an intermediate portion of the bottom surface 34 in the opposite direction to both side walls 33. Downside slopes 131 are formed on both sides and reverse V-shaped inclined grooves 132 are formed on the bottom side of the spring back to remove the springback, and the reverse V-shaped inclined grooves are formed in the bending punch 23 of the fixed side mold 2. 132 is formed to correspond to the mountain-shaped inclined surface 231 is formed so that both sidewalls 33 of the intersection of the upper periphery of the hole 232 operating the bending punch 23 and the downward inclined surface 131 is bent. Contact holder manufacturing apparatus for press mold.

The bottom surface punch punch 14 of the movable side mold 1 of the said 4th process part is a bottom surface formed in the plane so that the bottom surface 34 bent in the middle part in the reverse direction may be pressed flat. And the bending punch 24 of the fixed side mold 2 has an intermediate portion of both side walls 33 and the bottom surface 34 flattened to spread flatly.