KR100642049B1 - Rolling dies for drive shaft processing - Google Patents

Rolling dies for drive shaft processing Download PDF

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Publication number
KR100642049B1
KR100642049B1 KR1020050050188A KR20050050188A KR100642049B1 KR 100642049 B1 KR100642049 B1 KR 100642049B1 KR 1020050050188 A KR1020050050188 A KR 1020050050188A KR 20050050188 A KR20050050188 A KR 20050050188A KR 100642049 B1 KR100642049 B1 KR 100642049B1
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South Korea
Prior art keywords
teeth
admission
form rolling
rolling dies
worm shaft
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KR1020050050188A
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Korean (ko)
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오동열
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한국오에스지 주식회사
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H3/00—Making helical bodies or bodies having parts of helical shape
    • B21H3/02—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
    • B21H3/04—Making by means of profiled-rolls or die rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H5/00—Making gear wheels, racks, spline shafts or worms
    • B21H5/005—Worms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
    • B23G1/00—Thread cutting; Automatic machines specially designed therefor
    • B23G1/02—Thread cutting; Automatic machines specially designed therefor on an external or internal cylindrical or conical surface, e.g. on recesses

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gears, Cams (AREA)

Abstract

Form rolling dies for worm shaft processing which can accurately manufacture a worm shaft by a form rolling method by allowing teeth formed on an admission part to reduce processing resistance, and can process worm shafts with high price competitiveness by mass-producing products with excellent and uniform dimensional accuracy are provided. In form rolling dies comprising an admission part(2) which has a predetermined inclined plane and is formed on the outer periphery of cylindrical form rolling dies(D) in an admission direction of a workpiece(4), a parallel part(1) formed on a central portion of the outer periphery of the form rolling dies, and a separation part(3) which has a predetermined inclined plane and is formed on an end of the outer periphery of the form rolling dies, wherein teeth(101,201) are spirally formed from an outer end of the admission part to an outer end of the separation part, form rolling dies for worm shaft processing are characterized in that: teeth(201) of the admission part are formed in such a shape that the teeth have deep valleys(202), high and sharp tips, and a gradually more inclined angle as it goes to an end of the admission part into which the workpiece advances; teeth(102) of the parallel part are formed in such a shape that the teeth(102) having shallow valleys(102) and low height are formed in a vertical state, and the valleys(102) and the teeth(101) are formed in a shape with gentle slope and wide width and connected to the separation part as it goes from the admission part to the parallel part; and the admission part and the separation part have the same length.

Description

워엄축 가공용 전조다이스{Rolling dies for drive shaft processing}Rolling dies for drive shaft processing

도 1은 본 발명의 단면도1 is a cross-sectional view of the present invention

도 2는 본 발명전조다이스의 평행부치형을 나타낸 확대단면도Figure 2 is an enlarged cross-sectional view showing a parallel butch type of the present invention die rolls

도 3은 본 발명전조다이스의 진입부치형을 나타낸 확대단면도Figure 3 is an enlarged cross-sectional view showing the entry type of the invention die rolls

***도면의 주요부분에 대한 부호설명****** Explanation of symbols on main parts of drawings ***

1 : 평행부1: parallel part

101 : 평행부치형101: parallel butt type

2 : 진입부2: entrance

201 : 진입부치형201: Entry type

3 : 탈락부3: dropping part

4 : 가공소재4: processed material

본 발명은 워엄축가공용 전조다이스에 관한것으로서 보다 구체적으로는 워엄축 가공을 통과용 전조다이스를 이용하여 가공소재에 워엄치형을 형성할 수 있도록 한 것이다.The present invention relates to a rolling die for worm shaft machining, and more specifically, to form a worm tooth type in a workpiece by using a rolling die for passing a worm shaft machining.

일반적으로 워엄축은 축봉에 나선형의 치형을 형성하여 워엄기어와 치합하여 워엄축을 원동기어로 하여 워엄기어를 구동할수 있도록 하는 동력전달장치에 주로 사용되어 통상 워엄축과 워엄기어는 두축이 직교하여 교차하는 경우에 주로 사용되고 큰 감속비를 가지며 역회전 즉 워엄기어를 원동으로 하여서는 회전하지 않도록 하는 동력전달장치이다. In general, the worm shaft is mainly used in the power transmission device that forms helical teeth on the shaft and engages with the worm gear to drive the worm gear by using the worm shaft as a motive gear.In general, the worm shaft and the worm gear cross each other at right angles. It is mainly used for power transmission and has a large reduction ratio and it does not rotate by reverse rotation.

상기와 같이 사용되는 워엄축은 종래에는 주로 절삭기계인 선반가공 등의 기계가공에 의하여 주로 제작되었다.The worm shaft used as described above is conventionally manufactured mainly by machining such as lathe machining, which is a cutting machine.

따라서 가공속도가 느려 대량생산이 어려울 뿐만 아니라 이로 인한 제조원가을 상승을 초래하고 균일한 규격의 워엄축을 얻기가 어려운 결점이 있었고 이를 개선하여 근래에는 워엄축을 전조방식에 의하여 제조하는 워엄축의 제조방법이 다수 제안되어 시도되고 있으나 워엄축은 통상 치형의 높이가 높고 골밑쪽이 넓어 전조가공시 외경쪽으로 성형되는 양이 적고 워엄축의 가공시에 가공되어 선행하는 워엄축의 치형이 전조다이스의 치형과 치합하여 전진시에 진입부로 진입하는 가공소재의 가공저항이 커서 가공소재가 축방향으로 쉽게 늘어남으로 치형의 치수가 불규칙하고 성형상태가 불량하여 전조성이 떨어지고 정밀한 워엄축을 얻을 수 없었다 Therefore, it is difficult to mass-produce due to the slow processing speed, and it has caused the defect of raising the manufacturing cost and making it difficult to obtain the worm shaft of uniform standard.In recent years, many worm shaft manufacturing methods for manufacturing worm shaft by rolling method have been improved. Although the worm shaft has high tooth profile and wide bottom of the bone, the worm shaft usually has a small amount of molding to the outer diameter during rolling process, and is processed during the machining of the worm shaft, and the tooth of the preceding worm shaft is matched with the teeth of the rolling die. Due to the large machining resistance of the workpiece entering the entrance, the workpiece is easily stretched in the axial direction, so the tooth dimensions are irregular and the molding condition is poor, resulting in poor rollability and precise worm shafts.

따라서 근래에도 워엄축은 주로 절삭가공의 의해 제조되고 있는 실정이다.Therefore, in recent years, the worm shaft is mainly manufactured by cutting.

본 발명은 상기와 같은 종래의 결점을 개선하여 워엄축을 전조다이스를 이용하여 제조할수 있도록 전조다이스의 치형을 진입부의 치형과 평행부의 치형의 모양이 서로 다른 이종치형으로 형성하여 진입부에 형성되는 치형은 가공저항을 줄일 수 있도록 하여 정밀한 워엄축을 전조방식에 의해 제조할수 있도록 하며 워엄축 치형의 치수정밀도가 우수하고 균일한 제품을 대량생산할 수 있도록 하여 가격경쟁력이 높은 워엄축을 가공할수 있도록 하는 워엄축 가공용 전조다이스를 제안함에 그 목적이 있다.The present invention is to form a tooth of the rolling die to the teeth of the entry portion and the teeth of the parallel portion of the teeth of the rolling die to form a different tooth different from the teeth of the rolling die to manufacture the worm shaft using the rolling die to improve the conventional drawback as described above. Is designed to manufacture precision worm shafts by rolling method to reduce processing resistance, and to produce worm shafts with high dimensional accuracy of worm shaft teeth and mass production of uniform products. Its purpose is to propose a precursor die.

상기와 같은 목적을 달성하기 위하여 본 발명은 원통형의 전조다이스의 외주에 소정의 경사각을 갖는 진입부(2)와 평형상태의 평행부(1) 및 소정의 탈락각을 이루는 탈락부(3)로 구성되며 진입부(2)에 형성되는 진입부치형(201)과 평행부에 형성되는 평행부치형(101)이 서로 다른 모양으로 이루어 지도록 하되 진입부(2)에 형성되는 진입부치형(201)은 가공소재의 진입시에 전조가공부하량을 적게 받도록 함으로서 가공되는 워엄축의 치수정밀도가 우수하고 전조성형이 양호한 전조다이스를 얻을 수 있는데 이를 첨부된 도면에 의거하여 상세히 설명하면 다음과 같다.In order to achieve the above object, the present invention provides an entry portion (2) having a predetermined inclination angle on the outer circumference of the cylindrical rolling die and a parallel portion (1) in equilibrium and a dropping portion (3) forming a predetermined dropping angle. The entry part type 201 formed in the entry part 2 is configured such that the entry part type 201 formed in the entry part 2 and the parallel part type 101 formed in the parallel part have different shapes. By receiving a small amount of the roll processing load at the time of entry into the workpiece, the roll die having excellent dimensional accuracy and good roll forming can be obtained.

먼저 도 1은 본 발명의 단면도로서 워엄축가공용 원통형전조다이스의 구성을 나타낸 단면도이고 도 2는 본 발명의 평행부의 치형을 나타낸 확대단면도이며 도 3은 진입부의 치형을 나타낸 확대단면도가 도시되어 있다1 is a cross-sectional view showing the configuration of a cylindrical roll die for worm shaft machining as a cross-sectional view of the present invention, Figure 2 is an enlarged cross-sectional view showing the teeth of the parallel portion of the present invention, Figure 3 is an enlarged cross-sectional view showing the teeth of the entry portion.

즉 본 발명은 원통형 전조다이스(D)의 외주의 가공소재(4) 진입방향으로 소정의 경사면을 형성하여 진입부(2)를 형성하고 전조다이스(d)의 외주가운데부에 평행부(1)를 형성하며 외주끝에는 소정의 경사면을 가진 탈락부(3)로 구성되고 치형(101)(201)은 진입부(2)의 외측끝에서 시작하여 탈락부(3)에 외측끝까지 나선형으로 형성하되 진입부치형(201)은 도 3에서와 같이 평행부치형(101)보다 골(202)이 깊고 치형(201)의 끝이 높고 뾰족하게 형성하여 치형이 평행부(1)로 진행됨에 따라 도 2와 같이 골(102)의 깊이와 치형(101)의 높이가 낮고 골(102)과 치형(101)의 형상이 완만한 경사를 이루며 폭이 커지도록 구성되어 탈락부(3)로 연결되도록한 구성이다. 또한 진입부(2)의 치형(201)은 도 3에서 자세히 볼 수 있듯이 가공소재(4)가 진입하는 끝단으로 갈수록 치형(201)의 각도가 조금씩 점차 더 기울어지도록 구성하였는데, 이는 가공소재(4)가 진입할 때 치형(201)에 작용하는 힘이 치형(201)의 완전 측방향에서 작용하지 않도록 하여 치형을 보호하고, 작용하는 힘에 치형이 잘 견디도록 힘이 작용하는 방향으로 치형의 각도를 기울인 것으로, 치형의 수명을 늘리는 작용을 하게 된다.
또 진입부(2)와 탈락부(3)의 길이를 동일하게 구성하였는데, 이는 가공량이 큰 진입부(2)의 경사를 완만하게 하면서 길이를 탈락부(3)만큼 길게 하여 부하를 최소화하는 것이다.In other words, the present invention forms a predetermined inclined surface in the entry direction of the workpiece 4 of the outer peripheral die of the cylindrical rolling die (D) to form the entry portion (2) and parallel to the outer peripheral portion of the rolling die (d) (1) The outer peripheral end is composed of a dropping portion (3) having a predetermined inclined surface and the teeth 101, 201 is formed spirally from the outer end of the entry portion (2) to the outer end in the dropping portion (3) As shown in Fig. 3, the butt die 201 is deeper than the parallel butt 101, and the tip of the tooth 201 is formed to be sharp and sharp, so that the tooth is advanced to the parallel portion 1 as shown in FIG. As described above, the depth of the bone 102 and the height of the tooth 101 are low, and the shape of the bone 102 and the tooth 101 forms a gentle inclination and the width is increased so as to be connected to the dropping part 3. . In addition, the teeth 201 of the entry part 2 are configured such that the angle of the teeth 201 gradually gradually inclines toward the end where the workpiece 4 enters, as shown in detail in FIG. 3. The angle of the tooth in the direction in which the force acts so that the force acting on the tooth 201 to prevent the force acting on the tooth 201 from being fully lateral to the tooth 201 protects the tooth and to withstand the force acting well. By tilting, it will act to increase the life of the teeth.
In addition, the length of the entry part 2 and the dropout part 3 is configured to be the same, which is to minimize the load by lengthening the length by the dropout part 3 while smoothing the inclination of the entry part 2 having a large amount of processing. .

상기와 같이되는 본 발명의 작용을 보면 진입부(2)가 소정의 경사로 형성되고 진입부치형(201)의 형상이 뾰족하게 형성되어 가공소재의 진입시에 가공량이 적어 가공부하량이 최소화되고 가공소재(4)가 진행함에 연속적으로 워엄축으로 가공이 진행되어 지게 되며 가공부하량이 진입부(2)와 평행부(1)가 편차가 적게되어 가공소재(4)의 변형을 방지하게 되고 치형의 치수정밀도 및 성형상태가 우수한 워엄축을 얻을 수 있게 된다.In view of the operation of the present invention as described above, the entry portion 2 is formed with a predetermined inclination and the shape of the entry portion type 201 is sharply formed, so that the amount of processing at the time of entry of the processing material is small, the processing load is minimized and the processing material ( 4) As the process proceeds, the machining progresses to the worm shaft continuously, and the processing load is less deviation between the entry part 2 and the parallel part 1, thereby preventing deformation of the workpiece 4 and dimensional accuracy of the teeth. And the worm shaft excellent in the molding state can be obtained.

상기와 같이된 본 발명은 전조다이스(D)를 이용하여 워엄축을 가공함으로서 워엄축이 균일하고 형상이 항상 안정된 워엄축을 얻을 수 있을뿐만 아니라 가공공정이 간단하고 가공시간이 짧아서 대량생산이 용이함으로 가격경쟁력이 높은 워엄축을 얻을수 있는 잇점이 있다. In the present invention as described above, by processing the worm shaft using the rolling die (D), the worm shaft is uniform and the shape is always stable to obtain a worm shaft, as well as the processing process is simple and the processing time is short, so that mass production is easy. There is an advantage in obtaining a highly competitive worm shaft.

Claims (1)

원통형 전조다이스(D) 외주의 가공소재(4) 진입방향으로 소정의 경사면을 가진 진입부(2)를 형성하고, 전조다이스(D)의 외주 가운데부에 평행부(1)를 형성하며, 외주끝에는 소정의 경사면을 가진 탈락부(3)로 구성되어 치형(101)(201)이 진입부(2)의 외측 끝에서 시작하여 탈락부(3)에 외측끝까지 나선형으로 형성되는 전조다이스에 있어서,The entry part 2 having a predetermined inclined surface is formed in the entry direction of the workpiece 4 of the cylindrical rolling die D outer circumference, and the parallel part 1 is formed in the center of the outer circumference of the rolling die D. In the rolling die which consists of the dropping part 3 which has a predetermined inclined surface at the end, and the teeth 101 and 201 are formed spirally from the outer end of the entrance part 2 to the outer end in the dropping part 3, 진입부(2)의 치형(201)은 가공소재가 진입하는 끝단으로 갈수록 골(202)이 깊고 치형(201)의 끝이 높고 뾰족하게 형성함과 동시에 치형(201)의 각도가 점차 더 기울어지도록 구성하고,The teeth 201 of the entry portion 2 are formed so that the bone 202 is deeper and the ends of the teeth 201 are sharper and sharper toward the end where the workpiece enters, and the angle of the teeth 201 is gradually inclined. Make up, 치형이 평행부(1)로 진행됨에 따라 골(202)의 깊이와 치형(101)의 높이가 낮아지면서 치형이 수직상태가 되고, 골(102)과 치형(101)의 형상이 완만한 경사를 이루며 폭이 커지도록 구성되어 탈락부(3)로 연결되도록 하며,As the tooth progresses to the parallel part 1, the depth of the bone 202 and the height of the tooth 101 decrease, and the tooth becomes vertical, and the shape of the bone 102 and the tooth 101 is gradually inclined. It is configured to increase in width and to be connected to the dropping portion (3), 진입부(2)와 탈락부(3)의 길이가 동일하도록 구성한 것을 특징으로 하는 워엄축 가공용 전조다이스.Rolling die for worm shaft processing, characterized in that the length of the entry portion (2) and the dropping portion (3) is configured to be the same.
KR1020050050188A 2005-06-13 2005-06-13 Rolling dies for drive shaft processing KR100642049B1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100815841B1 (en) 2007-02-27 2008-03-21 한국오에스지 주식회사 Thrufeeding rolling dies for lead screw drive shaft processing
KR101187776B1 (en) 2010-04-19 2012-10-04 (주)케이지엠 The manufacturing method of gear
KR102090488B1 (en) * 2018-10-26 2020-03-18 주식회사 모코 form rolling

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100815841B1 (en) 2007-02-27 2008-03-21 한국오에스지 주식회사 Thrufeeding rolling dies for lead screw drive shaft processing
KR101187776B1 (en) 2010-04-19 2012-10-04 (주)케이지엠 The manufacturing method of gear
KR102090488B1 (en) * 2018-10-26 2020-03-18 주식회사 모코 form rolling

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