KR20110119949A - Helical gear cold sizing mold - Google Patents

Helical gear cold sizing mold Download PDF

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Publication number
KR20110119949A
KR20110119949A KR1020100039386A KR20100039386A KR20110119949A KR 20110119949 A KR20110119949 A KR 20110119949A KR 1020100039386 A KR1020100039386 A KR 1020100039386A KR 20100039386 A KR20100039386 A KR 20100039386A KR 20110119949 A KR20110119949 A KR 20110119949A
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South Korea
Prior art keywords
helical gear
helical
guide
teeth
sizing
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KR1020100039386A
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Korean (ko)
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KR101278662B1 (en
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남중희
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대창엔프라주식회사
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/28—Making machine elements wheels; discs
    • B21K1/30—Making machine elements wheels; discs with gear-teeth
    • B21K1/305—Making machine elements wheels; discs with gear-teeth helical
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
    • B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
    • B21J5/025—Closed die forging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/08—Upsetting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/12—Forming profiles on internal or external surfaces

Abstract

PURPOSE: A helical gear cold sizing mold is provided to prevent the degradation of size accuracy of a helical gear by cold-sizing the helical gear preformed through hot forging. CONSTITUTION: A helical gear cold sizing mold is configured as follows. A preformed helical gear is fixed between upper and lower plates(1,2) by a support(9) and a piston(5). The helical gear is meshed with helical teeth(11) of a guide(10) installed in a lower housing(12). When a helical tool(8) fixed to an upper housing(7) is lowered, the upper and lower housings are coupled together and moved along the helical teeth, thereby sizing the tooth shape of the preformed helical gear.

Description

헬리컬 기어 냉간 사이징 금형{helical gear cold sizing mold}Helical gear cold sizing mold

본 발명은 소재를 열간에서 업셋팅(upsetting)한 후 밀폐단조하여 치형을 단조한 헬리컬 기어를 냉간에서 사이징(sizing)하여 치수정도를 향상하게 하는 헬리컬 기어의 냉간 사이징 금형에 관한 것이다.
The present invention relates to a cold sizing mold of a helical gear for improving the dimensional accuracy by cold sizing the helical gear forging a tooth by forging a closed forging after hot-setting the material.

자동차의 변속기에는 기어의 물림율이 높고 회전이 원활하여 소음의 발생이 적은 헬리컬 치형의 기어가 널리 사용되고 있다.Helical toothed gears are widely used in transmissions of automobiles because of high bit rate of gears and smooth rotation.

헬리컬 기어에는 소재의 표면에 비틀림 치차가 형성되도록 절삭가공하거나 비절삭 가공하는 방법이 사용되고 있다.In helical gears, a method of cutting or non-cutting is used to form a torsional tooth on the surface of the material.

종래 헬리컬 기어의 절삭가공방법은 주로 호빙머신에서 가공되고 있었으나, 절삭가공에는 많은 시간이 소요되고 절삭칩이 발생되므로 재료의 손실이 발생하고 절삭으로 형성되는 치형은 피로강도가 떨어진다는 문제점이 있었고, 비절삭 가공방법에는 분말성형법, 열간 또는 냉간단조법이 있었으나 분말성형법은 성형되는 헬리컬 기어의 강도가 상대적으로 낮아 적용에 제한이 따르고, 열간단조법의 경우 성형되는 치형의 치수정도가 낮아 성형 후 절삭 또는 연삭과 같은 재가공과정이 필요하였으며, 냉간단조법의 경우 단조에 필요한 가압력이 1500톤 이상으로 매우 높아 압력의 제어가 어렵고, 또한 높은 압력으로 금형의 수명이 단축되며 치면에 충진불량과 같은 현상이 발생하기 쉽다는 문제점이 있었다.Conventionally, the helical gear cutting method is mainly processed in the hobbing machine, but the cutting process takes a lot of time and the cutting chip is generated, there is a problem that the loss of material occurs and the teeth formed by cutting have a low fatigue strength, There were powder molding, hot or cold forging methods for non-cutting methods. However, powder molding method is limited in application because the strength of the helical gear to be formed is relatively low. Or reprocessing process such as grinding was required. In case of cold forging, the pressing force required for forging is more than 1500 ton, which makes it difficult to control the pressure. There was a problem that it was easy to occur.

그러나 절삭가공에 비하여 단조방법에 의하여 제조되는 헬리컬 기어는 소재의 손실이 없고 가공시간이 짧아 생산성을 높일 수 있으며, 치형의 피로강도를 향상시킬 수 있어 차량의 고성능화로 변속기의 단수가 증가되는 추세에 따라 보다 헬리컬 기어를 컴팩트하게 하면서 저비용으로 제조하여야 할 필요가 증가됨에 따라 헬리컬 기어를 단조방법에 의하여 제조하는 방법 또는 장치의 개발필요성이 대두되고 있다.
However, the helical gear manufactured by the forging method, compared to the cutting process, has no material loss and the machining time is short, thereby improving productivity, and the fatigue strength of the teeth can be improved. Accordingly, as the necessity of manufacturing the helical gears more compactly and at a lower cost increases, there is a need for the development of a method or apparatus for manufacturing the helical gears by a forging method.

본 발명은 헬리컬 기어를 비절삭 가공방법인 단조방법에 의하여 성형하되 열간단조와 냉간단조의 장점을 살려 열간단조된 헬리컬 기어를 냉간 사이징하여 치수정도를 높임으로써 열간 단조된 헬리컬 기어의 재가공을 불필요하게 하거나 간략하게 할 수 있게 하는 헬리컬 기어 냉간 사이징 금형을 제공하는 것을 목적으로 한다.The present invention forms the helical gear by the forging method, which is a non-cutting method, but takes advantage of the hot forging and cold forging, by cold sizing the hot forged helical gear to increase the dimensional accuracy, thereby making it unnecessary to rework the hot forged helical gear. It is an object of the present invention to provide a helical gear cold sizing mold that can be made or simplified.

또한 본 발명은 냉간단조금형의 가압력과 가공량을 줄여 금형의 수명을 연장할 수 있게 하는 것을 목적으로 한다.
In addition, an object of the present invention is to reduce the pressing force and the amount of processing of the cold forging die to extend the life of the mold.

본 발명은 일정한 길이로 절단된 소재를 열간에서 업셋팅(upsetting)하고 밀폐단조하여 헬리컬 기어의 형태를 성형한 다음, 헬리컬 기어의 치형을 단조하고 냉각시켜 사이징 금형으로 헬리컬 기어의 치수정도를 향상하는 냉간단조를 수행한다.The present invention upsetting (hotsetting) the material cut to a certain length in the hot and closed forging to form the shape of the helical gear, and then forging and cooling the teeth of the helical gear to improve the dimensional accuracy of the helical gear by the sizing mold Perform cold forging.

사이징 금형은 상·하부플레이트 사이에 상·하부플레이트에 결합고정되는 복수의 핀 실린더와 핀에 의하여 가이드 되면서 상부플레이트가 승·하강되게 구성되고, 상·하부플레이트에는 각각 상·하부하우징이 결합되며 상부하우징에는 중심부에 피스톤을 수용하는 실린더 하우징이 구비되고 하부하우징에는 가운데에 서포트를 수용하는 가이드가 구비된다.The sizing mold is guided by a plurality of pin cylinders and pins fixed to the upper and lower plates between the upper and lower plates, and the upper plate is lifted and lowered. The upper housing is provided with a cylinder housing for accommodating the piston in the center, and the lower housing is provided with a guide for receiving the support in the middle.

상부플레이트가 프레스에 의하여 하강하면 상부플레이트에 결합된 실린더 하우징과 상부하우징 및 피스톤이 하강하면서 피스톤의 하부 원주방향에 결합된 헬리컬 툴과 가이드의 상·하부면에 형성된 홈이 결합되어 가이드의 중심부에 위치한 서포트에 안치된 가공물인 헬리컬 기어를 피스톤이 눌러 고정하면서 헬리컬 툴이 계속 하강하면 가이드의 내경에 형성된 헬리컬 치형과 헬리컬 기어가 치합되고 서포트와 피스톤에 의하여 고정된 헬리컬 기어에 대하여 가이드가 회동하면서 하강하면 상부하우징의 단부에 구비된 헬리컬 툴이 하강하면서 가이드의 회동과 연동하여 헬리컬 기어의 치형을 사이징하게 구성된다.
When the upper plate is lowered by the press, the cylinder housing coupled to the upper plate, the upper housing and the piston are lowered, and the helical tool coupled to the lower circumferential direction of the piston and the grooves formed on the upper and lower surfaces of the guide are coupled to the center of the guide. If the helical gear continues to descend while the piston presses and fixes the helical gear, which is the workpiece placed on the supporting support, the helical teeth formed in the inner diameter of the guide and the helical gear are engaged and the guide rotates about the helical gear fixed by the support and the piston. The helical tool provided at the end of the lower housing is configured to size the teeth of the helical gear in conjunction with the rotation of the guide while descending.

본 발명은 열간단조로 예비성형된 헬리컬 기어를 냉간 사이징으로 치수정도를 향상할 수 있게 하여 헬리컬 기어의 열간 단조에 따른 치수정도의 저하를 방지할 수 있게 하고, 과도한 냉간 단조에 따른 금형수명의 단축이나 치형형성의 불량을 방지할 수 있게 하는 효과가 있다.
The present invention makes it possible to improve the dimensional accuracy of the helical gear preformed by hot forging by cold sizing to prevent the reduction of the dimensional accuracy due to the hot forging of the helical gear, and to shorten the mold life due to excessive cold forging. In addition, there is an effect to prevent the defect of the tooth formation.

도 1은 본 발명 헬리컬 기어의 성형공정의 개요
도 2는 본 발명 헬리컬 기어의 냉간 사이징 금형의 측단면도(a) 및 절개도(b)
도 3은 본 발명 실린더 하우징의 평면도(a) 및 측면도(b)
도 4는 본 발명 피스톤의 측면도
도 5는 본 발명 상부하우징의 측단면도(a) 및 사시도(b)
도 6은 본 발명 하부하우징의 측면도(a) 및 사시도(b)
도 7은 본 발명 가이드의 측단면도(a) 및 사시도(b)
도 8은 본 발명 헬리컬 툴의 측단면도(a) 및 사시도(b)1 is a summary of the molding process of the helical gear of the present invention
Figure 2 is a side cross-sectional view (a) and cutaway (b) of the cold sizing mold of the helical gear of the present invention
3 is a plan view (a) and a side view (b) of a cylinder housing of the present invention;
4 is a side view of the present invention piston
Figure 5 is a side cross-sectional view (a) and a perspective view (b) of the upper housing of the present invention
Figure 6 is a side view (a) and a perspective view (b) of the lower housing of the present invention
Figure 7 is a side cross-sectional view (a) and a perspective view (b) of the guide of the present invention
8 is a side cross-sectional view (a) and a perspective view (b) of the helical tool of the present invention;

이하에서 본 발명의 바람직한 실시 예에 대하여 첨부한 도면을 참조하여 상세하게 설명하기로 한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1에 도시된 바와 같이 본 발명은 열간단조로 예비성형된 헬리컬 기어를 냉간단조로 사이징하여 치수정도를 향상하게 하는 냉간 단조 사이징 금형에 관한 것이다.As shown in FIG. 1, the present invention relates to a cold forged sizing mold for sizing the helical gear preformed by hot forging to cold forging to improve the dimensional accuracy.

본 발명의 냉간단조 사이징 금형은 상·하부플레이트(1,2) 사이에 상·하부플레이트(1,2)에 결합고정되는 복수의 핀 실린더(3)와 핀(4)에 의하여 상부플레이트(1)가 가이드 되면서 프레스(도면미도시)에 의하여 수직방향으로 승·하강되게 구성되어 있다.In the cold forging sizing die of the present invention, the upper plate 1 is formed by a plurality of pin cylinders 3 and pins 4 fixed to the upper and lower plates 1 and 2 between the upper and lower plates 1 and 2. ) Is guided and configured to move up and down in a vertical direction by a press (not shown).

핀 실린더(3)와 핀(4)에 의하여 가이드 되면서 승·하강되는 상부플레이트(1)에는 피스톤(5)과, 피스톤(5)을 고정하는 실린더 하우징(6) 및 실린더 하우징(6)을 고정하고 피스톤(5)을 중심으로 일정각도 범위 내에서 회동할 수 있게 구성된 상부하우징(7)이 결합되어 있고, 상부하우징(7)의 가운데 저면에는 헬리컬 툴(8)이 피스톤(5)을 중심으로 결합되어 있다.The piston 5, the cylinder housing 6 for fixing the piston 5, and the cylinder housing 6 are fixed to the upper plate 1, which is guided by the pin cylinder 3 and the pin 4, and is lowered and lowered. And an upper housing 7 configured to rotate within a predetermined angle range around the piston 5, and a helical tool 8 is centered on the piston 5 at the bottom of the upper housing 7. Are combined.

하부플레이트(2)에는 하강하는 피스톤(5)의 하부와 대응되는 위치에 서포트(9)가 고정되어 있고, 서포트(9) 주위에는 내경에 헬리컬 치형(11)이 형성된 가이드(10)가 결합되어 있으며, 가이드(10)는 하부플레이트(2)에 고정되어 있는 하부하우징(12)에 대하여 일정각도 범위 내에서 회동가능하게 수용되어 있다.The support plate 9 is fixed to the lower plate 2 at a position corresponding to the lower portion of the descending piston 5, and the guide 10 having the helical tooth 11 formed therein is coupled to the inner diameter around the support 9. The guide 10 is rotatably received within a predetermined angle with respect to the lower housing 12 fixed to the lower plate 2.

서포트(9)의 상부 가이드(10)의 헬리컬 치형(11)이 형성된 부분에는 가공물인 예비성형된 헬리컬 기어(도면미도시)가 위치한다.In the portion where the helical teeth 11 of the upper guide 10 of the support 9 are formed, a preformed helical gear (not shown) which is a workpiece is located.

서포트(9)는 하부하우징(12)에 대하여 승·하강할 수 있게 구성되어 있으며, 가이드(10)의 승·하강은 상부하우징(7)에 의하여 하강하고 코일스프링(14)에 의하여 리턴될 수 있게 구성되어 있으나 유압실린더(도면미도시)에 의하여 리턴되게 구성할 수도 있다.The support 9 is configured to move up and down with respect to the lower housing 12, and the up and down of the guide 10 may be lowered by the upper housing 7 and returned by the coil spring 14. It may be configured to be returned by the hydraulic cylinder (not shown).

상부플레이트(1)가 프레스에 의하여 하강하면 상부하우징(7)의 가운데에 위치한 피스톤(5)이 서포트(9)와 가이드(10)에 의하여 위치가 고정된 예비성형된 헬리컬 기어를 누르면서 고정하고, 상부하우징(7)은 계속 하강하면서 상부하우징(7)의 하부에 결합된 헬리컬 툴(8)이 가이드(10)와 접촉하게 된다.When the upper plate 1 is lowered by the press, the piston 5 located in the center of the upper housing 7 is fixed while pressing the preformed helical gear whose position is fixed by the support 9 and the guide 10, The upper housing 7 continues to descend so that the helical tool 8 coupled to the lower portion of the upper housing 7 comes into contact with the guide 10.

헬리컬 툴(8)의 저면에 형성된 홈(13)과 가이드(10)의 상부에 형성된 홈(13')이 서로 맞물리면서 상부하우징(7)과 가이드(10)는 일체화되고, 서포트(9)에 지지되어 위치가 고정된 예비성형된 헬리컬 기어의 치형과 기이드(10)의 내경측에 형성된 헬리컬 치형(11)이 치합되어 가이드(10)는 결합된 헬리컬 치형(11)에 의하여 상부하우징(7)과 함께 일정한 각도범위 내에서 하강하면서 회동하게 된다.As the groove 13 formed at the bottom of the helical tool 8 and the groove 13 'formed at the top of the guide 10 are engaged with each other, the upper housing 7 and the guide 10 are integrated and supported by the support 9. The helical teeth 11 formed on the inner diameter side of the base 10 and the teeth of the preformed helical gear fixed in position are joined so that the guide 10 is connected to the upper housing 7 by the combined helical teeth 11. And rotate while descending within a certain angle range.

가이드(10)가 상부하우징(7)에 의하여 하강하게 되면 서포트(9)에 의하여 위치가 고정된 예비성형된 헬리컬 기어의 헬리컬 치형에는 상부하우징(7)의 아래에 결합된 헬리컬 툴(8)의 헬리컬 치형(11')이 예비성형된 헬리컬 기어의 치형을 사이징하면서 하강한다.When the guide 10 is lowered by the upper housing 7, the helical tooth of the preformed helical gear fixed in position by the support 9 has a helical tool 8 coupled to the bottom of the upper housing 7. The helical teeth 11 'are lowered while sizing the teeth of the preformed helical gear.

이때 헬리컬 툴(8)은 가이드(10)와 일체로 결합된 상부하우징(7)에 의하여 헬리컬 기어의 경사각에 대응되는 일정한 각도범위 내에서 헬리컬 치형(11)을 따라 회동된다.At this time, the helical tool 8 is rotated along the helical tooth 11 within a predetermined angle range corresponding to the inclination angle of the helical gear by the upper housing 7 integrally coupled with the guide 10.

예비성형된 헬리컬 기어의 치형이 헬리컬 툴(8)에 의하여 사이징이 완료되면 상부하우징(7)은 상승하고 사이징된 헬리컬 기어는 가이드(10)의 상승에 따라 위쪽으로 배출된다.
When the teeth of the preformed helical gear are sized by the helical tool 8, the upper housing 7 is raised and the sized helical gear is discharged upwards as the guide 10 is raised.

본 발명은 자동차의 변속기 등 대량생산이 필요한 헬리컬 기어의 생산에 활용할 수 있다.
The present invention can be utilized for the production of helical gears that require mass production, such as transmissions of automobiles.

1. 상부플레이트 2. 하부플레이트
3. 핀 실린더 4. 핀
5. 피스톤 6. 실린더 하우징
7. 상부하우징 8. 헬리컬 툴
9. 서포트 10. 가이드
11,11'. 헬리컬 치형 12. 하부하우징
13,13'. 홈 14. 코일스프링1. Upper plate 2. Lower plate
3. pin cylinder 4. pin
5. Piston 6. Cylinder Housing
7. Upper housing 8. Helical tool
9. Support 10. Guide
11,11 '. Helical Teeth 12. Lower Housing
13,13 '. Groove 14. Coil Springs

Claims (3)

열간단조로 업셋팅 및 밀폐단조를 거쳐 치형을 예비성형된 헬리컬 기어를 냉간에서 사이징하는 금형에 있어서,
상·하부플레이트(1,2) 사이에 서포트(9)와 피스톤(5)에 의하여 위치고정되는 예비성형된 헬리컬 기어를 하부하우징(12)에 회동가능하게 고정된 가이드(10)의 헬리컬 치형(11)에 치합시키고, 상부하우징(7)에 고정된 헬리컬 툴(8)을 하강시 상·하부하우징(7,12)이 결합되면서 헬리컬 치형(11)을 따라 회동하면서 헬리컬 툴(8)에 의하여 예비성형된 헬리컬 기어의 치형을 사이징할 수 있게 한 것을 특징으로 하는 헬리컬 기어 냉간 사이징 금형.
In the mold for cold sizing the helical gear pre-formed teeth through upsetting and closed forging in hot forging,
Helical teeth of the guide 10 rotatably fixed to the lower housing 12 by a preformed helical gear that is fixed between the upper and lower plates 1 and 2 by the support 9 and the piston 5. 11) and the helical tool 8 fixed to the upper housing 7 by the helical tool 8 while rotating along the helical teeth 11 while the upper and lower housings 7 and 12 are engaged. Helical gear cold sizing mold, characterized by sizing the teeth of the preformed helical gear.
제 1항에 있어서, 상·하부플레이트(1,2) 사이에는 하나 이상의 핀 실린더(3)와 핀(4)이 구비되어 핀 실린더(3)와 핀(4)의 결합에 의한 가이드로 상부플레이트(1)가 수직으로 승·하강할 수 있게 한 것을 특징으로 하는 헬리컬 기어 냉간 사이징 금형.
The upper plate according to claim 1, wherein at least one pin cylinder (3) and a pin (4) are provided between the upper and lower plates (1,2) to guide the coupling of the pin cylinder (3) and the pin (4). A helical gear cold sizing die, characterized by allowing (1) to move up and down vertically.
제 1항에 있어서, 하부하우징(12)에 회동가능하게 고정된 가이드(10)는 하나 이상의 코일 스프링(12)에 의하여 리턴될 수 있게 한 것을 특징으로 하는 헬리컬 기어 냉간 사이징 금형.
Helical gear cold sizing mold according to claim 1, characterized in that the guide (10) rotatably fixed to the lower housing (12) can be returned by one or more coil springs (12).
KR1020100039386A 2010-04-28 2010-04-28 helical gear cold sizing mold KR101278662B1 (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102688975A (en) * 2012-05-15 2012-09-26 翟吉明 Cutting-free gear manufacturing process
CN102896266A (en) * 2012-08-30 2013-01-30 镇江中虎弹簧有限公司 Cold forging process for external helical teeth
KR101478039B1 (en) * 2013-07-19 2015-01-02 주식회사 세림티앤디 Electronic Parking Brake System Carrier Producing Method by Cold Forging
KR101478041B1 (en) * 2013-07-10 2015-01-02 주식회사 세림티앤디 Electronic Parking Brake System Carrier Producing Method by Cold Forging
CN104624918A (en) * 2013-11-08 2015-05-20 本田技研工业株式会社 Method of manufacturing gear and forging apparatus for manufacturing gear
WO2016190500A1 (en) * 2015-05-28 2016-12-01 주식회사 세림티앤디 Method for manufacturing helical carrier molded product for full-automatic parking brake system by using cold forging

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KR0178768B1 (en) * 1994-12-16 1999-02-18 한진철 Method and apparatus of helical gear cold forging
KR100207441B1 (en) * 1996-08-26 1999-07-15 최재찬 Manufacturing method for high precision helical gear by cold extruding alloyed steel
JP3341981B2 (en) * 1997-08-27 2002-11-05 本田技研工業株式会社 Helical gear sizing device and sizing method
KR100692620B1 (en) * 2005-02-14 2007-03-13 일진금속공업 주식회사 Method of producing the pinion gear of an automobile start motor using cold forging process

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102688975A (en) * 2012-05-15 2012-09-26 翟吉明 Cutting-free gear manufacturing process
CN102896266A (en) * 2012-08-30 2013-01-30 镇江中虎弹簧有限公司 Cold forging process for external helical teeth
KR101478041B1 (en) * 2013-07-10 2015-01-02 주식회사 세림티앤디 Electronic Parking Brake System Carrier Producing Method by Cold Forging
KR101478039B1 (en) * 2013-07-19 2015-01-02 주식회사 세림티앤디 Electronic Parking Brake System Carrier Producing Method by Cold Forging
CN104624918A (en) * 2013-11-08 2015-05-20 本田技研工业株式会社 Method of manufacturing gear and forging apparatus for manufacturing gear
WO2016190500A1 (en) * 2015-05-28 2016-12-01 주식회사 세림티앤디 Method for manufacturing helical carrier molded product for full-automatic parking brake system by using cold forging

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