WO2012161507A2 - Thread rolling tap - Google Patents
Thread rolling tap Download PDFInfo
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- WO2012161507A2 WO2012161507A2 PCT/KR2012/004064 KR2012004064W WO2012161507A2 WO 2012161507 A2 WO2012161507 A2 WO 2012161507A2 KR 2012004064 W KR2012004064 W KR 2012004064W WO 2012161507 A2 WO2012161507 A2 WO 2012161507A2
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- thread
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- screw
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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
- B21H3/10—Making helical bodies or bodies having parts of helical shape twist-drills; screw-taps
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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
- B21H3/08—Making helical bodies or bodies having parts of helical shape internal screw-threads
Definitions
- the present invention relates to a thread rolled tap for forming a female thread by plastically processing a material, and more particularly, a thread rolled thread including a threaded portion formed along an outer surface thereof and having a tapered chamfer portion and a parallel portion extending from the chamfer portion.
- the chamfer portion is formed in front of the chamfer portion in contact with the surface of the through-hole of the material and comprises a guide portion having a predetermined width for guiding the thread-rolled tab into the through hole, the guide portion is a thread of the chamfer portion
- Thread rolled tap is a tool for manufacturing female thread by plastic processing of material and has been developed to have various shapes and characteristics.
- 1 is a reference diagram for explaining a method of manufacturing a female screw using a conventional thread rolled tap
- Figure 2 is a reference diagram for explaining the arrangement of threads in the chamfer portion of a conventional thread rolled tap
- Figure 3 Figure 4 is a reference diagram for explaining the arrangement of threads in the chamfer portion of another conventional thread rolled tap
- Figure 4 is a reference diagram for explaining the distance from the center of the thread rolled tap to the radial direction of the valley
- Figure 1 Referring to the method for manufacturing the screw rolling tab and the female thread with reference to 4 to 4, the thread rolling tab 200 is inserted into the through hole 110 of the material 100, as shown in Figure 1, the screw rolling tab When the 200 is rotated and advanced, the thread 210 formed on the outer side of the thread rolled tab 200 pressurizes the surface of the through hole 110 of the material 100 to plastically deform the material 100 so that the through hole is formed
- the thread 210 first contacts the surface of the through hole 110.
- the screw rolling tab 200 is spaced apart from the surface of the through hole 110 so that a space S is generated between the screw rolling tab 200 and the surface of the through hole 110. Thereafter, when the screw rolled tab 200 is continuously inserted into the through hole 110, the screw rolled tab 200 is not horizontally drawn into the through hole 110 and a warpage occurs, thereby causing the screw rolled.
- the center of the tab 200 is separated from the center of the through hole 110.
- the degree of separation is deepened as the depth of the through hole 110 of the material 100 increases, and as the center of the screw rolled tab 200 is separated from the center of the through hole 110, the through hole 110.
- unbaking occurs and on the other side, undersizing occurs and excessive torque is applied to the screw rolling tab 200, thereby causing damage to the screw rolling tab 200 and eating of the female screw.
- the present invention has been made to solve the above problems,
- An object of the present invention is to provide a thread rolled tab capable of improving the life and forming a high quality internal thread.
- the present invention includes a guide portion formed in front of the chamfer portion having a predetermined width in contact with the surface of the through hole of the material to guide the screw rolling tab into the through hole, wherein the guide portion is formed before the thread of the chamfer portion.
- the chamfer portion When the thread of the chamfer portion contacts the surface of the through hole in contact with the surface of the through hole for the first time, the chamfer portion is not spaced apart from the surface of the through hole to remove the bending phenomenon that may occur at the beginning of the insertion.
- the purpose is to provide.
- the present invention provides a screw rolled tap and a method of manufacturing the same, which can reduce the frictional resistance between the screw rolled tab and the material by reducing the radius of curvature of the projection protrusion, and facilitate the penetration of lubricant by increasing the radius of curvature of the calculated margin.
- the purpose is.
- the present invention has to increase the radius of curvature of the subproximal protrusion to increase the stiffness of the thread, facilitate the effective diameter measurement and smoothly flow the material, the radius of curvature of the subproximal margin should be removed during the manufacture of the thread rolled tab It is an object of the present invention to provide a thread rolled tap that can reduce the number of parts to minimize heat generated during manufacturing and shorten the manufacturing time.
- the present invention is implemented by the embodiment having the following configuration to achieve the above object.
- the thread rolling tab according to the present invention has a threaded thread formed along an outer surface, and includes a threaded portion having a tapered chamfer portion and a parallel portion extending from the chamfer portion, wherein
- the chamfer portion is formed in front of the chamfer portion and includes a guide portion having a predetermined width that contacts the surface of the through hole of the material and guides the screw rolled tab into the through hole, wherein the guide portion has the through hole before the thread of the chamfer portion. Since the chamfer portion is in contact with the surface, the chamfer portion is not located away from the surface of the through hole when the thread of the chamfer portion first contacts the through hole surface.
- the guide portion has a shape corresponding to the shape of the surface of the through hole, and is formed to a point having a guide forming angle of 120 to 360 degrees. do.
- a thread rolling tab according to the present invention, has a threaded thread formed along an outer surface thereof and includes a tapered chamfer portion and a threaded portion having a parallel portion extending from the chamfer portion.
- the screw portion has a plurality of projection protrusions protruding at predetermined intervals along the thread in the outer direction from the screw thread, a calculation margin connecting the adjacent projection projections, and a predetermined interval along the screw bones outward from the screw bone.
- the radius of curvature of the calculation protrusion has a value of 0.4 to 0.7 pitch
- the radius of curvature of the subprotrusion has a value of 0.8 to 1.5 pitch.
- the tangent angle of the calculation margin has a value of 14 to 18 degrees
- the tangent angle of the subliminal margin has a value of 9 to 13 degrees.
- the threaded portion connects a plurality of protrusions protruding at predetermined intervals along the threads from the threads to the outside, and connecting the adjacent protrusions.
- a calculation margin, a plurality of subconvex protrusions protruding at a predetermined interval along the screw bone from the screw bone to the outside, and a subsurface margin connecting the adjacent subproximal protrusions, and the radius of curvature of the estimating protrusion is It has a smaller value than the radius of curvature, and the radius of curvature of the calculation margin is characterized in that it has a larger value than the radius of curvature of the subsidence margin.
- the present invention can achieve the following effects by the configuration and combination, the use relationship described above in the present embodiment.
- the present invention has the effect that it is possible to provide a thread rolled tab that can improve the life and form a high-quality female thread.
- the present invention includes a guide portion formed in front of the chamfer portion having a predetermined width in contact with the surface of the through hole of the material to guide the screw rolling tab into the through hole, wherein the guide portion is formed before the thread of the chamfer portion.
- the chamfer portion is not spaced apart from the surface of the through-hole, thereby eliminating a warpage phenomenon that may occur at the initial stage of entry. .
- the present invention has the effect of having an improved quality by differently designing the profile of the top profile and the profile of the subsurface according to the features required in the top and the flank respectively.
- the present invention has an effect of reducing the radius of curvature of the projection projection portion to reduce the frictional resistance between the thread rolling tab and the material, and to increase the radius of curvature of the calculation margin portion to facilitate lubricating oil penetration.
- the present invention has to increase the radius of curvature of the subproximal protrusion to increase the stiffness of the thread, facilitate the effective diameter measurement and smoothly flow the material, the radius of curvature of the subproximal margin should be removed during the manufacture of the thread rolled tab Since the part to be reduced can be minimized, heat generated during manufacturing can be minimized and manufacturing time can be shortened.
- 1 is a reference diagram for explaining a method of manufacturing a female screw using a conventional thread rolled tap.
- Figure 2 is a reference diagram for explaining the arrangement of the threads in the chamfer portion of the conventional thread rolling tab.
- Figure 3 is a reference diagram for explaining the arrangement of threads in the chamfer portion of another conventional thread rolled tap.
- Figure 4 is a reference diagram for explaining the distance change in the radial direction of the calculation and the valley from the center of the conventional thread rolling tab.
- FIG. 5 is a perspective view of a screw rolling tab according to an embodiment of the present invention.
- FIG. 6 is a partially cutaway perspective view of the thread rolling tab cut along the line A-A of FIG.
- FIG. 7 is a sectional view taken along the line B-B in FIG. 5; FIG.
- FIG. 8 is a cross-sectional view taken along the line C-C in FIG.
- FIG. 9 is a reference diagram for explaining a method of manufacturing a female screw using a thread rolled tap according to an embodiment of the present invention.
- Figure 10 is a reference diagram for explaining the distance change in the radial direction of the calculation and the valley from the center of the screw rolled tap according to an embodiment of the present invention.
- Figure 11 is a reference diagram for explaining the arrangement of the threads in the chamfer portion of the thread rolling tab according to an embodiment of the present invention.
- flank 213 rib 221: guide part
- FIG. 5 is a perspective view of a screw rolling tab according to an embodiment of the present invention
- Figure 6 is a partial cutaway perspective view of the screw rolling tab cut by the line AA of Figure 5
- Figure 7 is a cross-sectional view of the line BB of Figure 5
- 8 is a cross-sectional view taken along line CC of FIG. 5
- FIG. 9 is a reference diagram for explaining a method of manufacturing a female screw using a thread rolled tap according to an embodiment of the present invention
- FIG. 10 is an embodiment of the present invention.
- Figure 11 is a reference diagram for explaining the distance from the center of the thread rolling tab according to the calculation and the radial direction of the valley, Figure 11 is for explaining the arrangement of the threads in the chamfer portion of the screw rolling tab according to an embodiment of the present invention See also.
- the thread rolling tab according to an embodiment of the present invention is a bag (1), and extends from the bag (1) and the thread 21 is formed along the outer surface of the female material 100 And a threaded portion 2 provided for forming the threaded portion.
- the direction in which the threaded portion 2 is located is represented by the front end direction, and the direction in which the bag 1 is located in the rear end direction.
- the threaded portion 2 includes a tapered chamfer portion 22 and a parallel portion 23 extending from the chamfer portion 22. Tapered threads are formed in the chamfer portion 22, and parallel portions 23 are formed in parallel threads extending continuously from the threads of the chamfer portion 22.
- the chamfer 22 is plastically processed to substantially form a female thread on the material 100, and the parallel portion 23 serves to trim the female thread formed on the material 100 by the chamfer 22. And the thread rolled tab maintain the straightness of travel within the material.
- the chamfer portion 22 is formed in front of the chamfer portion 22 in contact with the surface of the through hole 110 of the material 100 to guide a predetermined width for guiding the screw rolling tab into the through hole 110. And a guide part 221, wherein the guide part 221 contacts the surface of the through hole 110 before the thread of the chamfer part 22, so that the thread of the chamfer part 22 is formed in the through hole ( 110, the chamfer 22 is not positioned to be spaced apart from the surface of the through hole 110 when the surface is in contact with the surface.
- the guide portion 221 is located in the tip direction than the screw thread of the chamfer portion 22, and has a predetermined shape, but preferably through holes 110 of the material 100 as shown in Figures 5, 6 and 8 ) Has a shape corresponding to the surface, and has a predetermined width (W) and is formed from the position (P) where the thread starts to have a guide formation angle ( ⁇ ) of 120 to 360 degrees in the opposite direction, so that the radius (R) It is preferable to have the same length as the radius of the through-hole 110 of the material 100.
- the guide formation angle ⁇ is positive when two lines are drawn at the start point T and the end point U of the guide part 221 in the outward direction from the center point Q of the thread rolling tab. The angle formed by the lines a1 and a2 will be defined.
- the thread rolling tab is inserted into the through hole 110.
- the guide part 221 of the chamfer portion 22 is inserted into the through hole 110. Since the guide portion 221 is located in the front end direction than the thread of the chamfer 22, the guide portion 221 contacts the surface of the through hole 110 before the thread of the chamfer 22 to guide the screw rolling tab. Since the guide part 221 contacts the surface of the through hole 110 to guide the screw rolling tab, even when the thread of the chamfer 22 contacts the surface of the through hole 110 for the first time, the chamfer part ( 22 may not be spaced apart from the surface of the through hole 110.
- the thread rolled tab does not generate warpage at the beginning of the drawing, and when the thread rolled tap enters the through-hole 110 of the material 100, the finished female thread is unbaked or under-baked. Since there is no part, an excellent quality internal thread can be manufactured, and the screw rolled tab does not take excessive torque, and thus has an improved service life.
- the threaded portion 2 includes a plurality of crest lobes 24 protruding at predetermined intervals along the threads in an outward direction from the threads, and a crest margin connecting a plurality of crest lobes 24 adjacent thereto.
- relief 25 a root relief connecting the plurality of root lobes 26 protruding at predetermined intervals along the screw bone outwardly from the screw bone, and the root relief connecting the adjacent subproximal protrusions 26. , 27).
- the threaded portion 2 is formed with a projection protrusion 24, a calculation margin 25, a subproximal protrusion 26 and a subosseous margin 27, so when the threaded portion 2 is cut along the thread root
- the cross section has a polygonal shape.
- the cross-sectional shape of the threaded portion 2 may have a hexagonal shape as shown in FIG. 7.
- the top projection 24 pushes the surface of the through hole 110 to form a female thread of the material 100 to plastically deform the
- the radius of curvature of the estimate protrusion 24 has a smaller value than the radius of curvature of the subproximal protrusion 26, and the radius of curvature of the estimate margin 25 is greater than the radius of curvature of the substep recess 27. It has a value, preferably the radius of curvature of the calculation protrusion 24 has a value of 0.4 to 0.7 pitch, the radius of curvature of the subprotrusion protrusion 26 has a value of 0.8 to 1.5 pitch, the calculation margin ( The tangent angle ⁇ of 25) has a value of 14 to 18 degrees, and the tangent angle ⁇ of the subliminal margin 27 has a value of 9 degrees to 13 degrees.
- the radius of curvature of the top projection 24 is reduced, the pressure load of the material is lowered, and the contact area of the top projection 24 with the material 100 can be reduced, so that the frictional resistance between the screw rolled tab and the material 100 is reduced.
- the radius of curvature of the subproximal protrusion 26 is increased, the subproximal protrusion 26 is formed in a relatively gentle curve to increase the rigidity of the thread, and the effective diameter measurement is easy, and when the material overflows.
- the material 100 can be smoothly flowed, and if the radius of curvature of the calculation margin portion 25 is increased, the contact area with the material 100 is reduced to facilitate the penetration of lubricant oil,
- the radius of curvature of the margin portion 27 is small, since the portion to be removed by grinding in the manufacture of the thread rolled tab can be reduced, heat generated during manufacturing can be minimized and manufacturing time can be shortened.
- the thread rolled tab has a feature that can provide an improved quality by designing the profile of the peak 211 and the profile of the valley 213 differently according to the features required by the peak 211 and the flank 212. have.
- the thread roll tab according to the present invention may have a profile of the calculation 211 and a profile of the sub-golche 213, which are designed differently as shown in FIG.
- FIG. 11 is a screw rolling according to the present invention, assuming that the length of the chamfer portion 22 has a pitch and the threaded portion 2 is cut along the root of the threaded portion 21, the cross section having a hexagonal shape.
- the arrangement of the threads 21 of the chamfer portion 22 of the tab is described. Referring to FIGS. 5 to 11, the arrangement of the threads 21 of the chamfer portion 22 is shown in FIG. 11A.
- a guide part 221 having a diameter corresponding to a diameter of the through hole 110 of the material 100 is formed at the tip of the chamfer part 22, and the thread 21 is directed toward the parallel part 23.
- Six mountain peaks 24 are formed at intervals of 60 degrees. The closer the closer to the parallel portion 23, the larger the height h1 of the peak becomes and the depth h2 of the valley becomes deeper.
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Abstract
The present invention relates to a thread rolling tap for making female threads by plastically working the material, and more specifically, to a thread rolling tap comprising a threads part having threads along the outer surface, a chamfer part tapering into a curved shape, and a parallel part extending from the chamfer part, wherein the chamfer part comprises a guide part, which is formed contiguously in the front of the chamfer part and has a predetermined width, and which guides the thread rolling tap into a through-hole in a material by making contact with the surface of the through-hole; the guide part prevents the warping phenomena that can occur in the early stage of the entry by making contact with the surface of the through-hole earlier than the threads of the chamfer part and positioning the chamfer part without a separating distance from the surface of the through-hole when the threads of the chamfer part are making contact therewith; and the crest profile and the root profile are each designed differently as required by the respective particularities of the crest and the flank. Thus, the lifespan of the thread rolling tap is lengthened and high quality female threads are formed thereby.
Description
본 발명은 소재를 소성가공하여 암나사를 만드는 나사전조탭에 대한 것으로, 더욱 상세하게는 외면을 따라 나사산이 형성되고, 테이퍼진 챔퍼부와 상기 챔퍼부에서 연장되는 평행부를 가진 나사산부를 포함하는 나사전조탭에 있어서, 상기 챔퍼부는 챔퍼부의 전방에 연이어 형성되어 소재의 관통홀 표면에 접촉하여 상기 나사전조탭을 상기 관통홀 내로 가이드하는 소정의 폭을 가진 가이드부를 포함하며, 상기 가이드부는 상기 챔퍼부의 나사산보다 먼저 상기 관통홀 표면에 접촉하여 상기 챔퍼부의 나사산이 상기 관통홀 표면에 접촉시 상기 챔퍼부가 상기 관통홀의 표면에서 이격되어 위치하지 않도록 하여 인입 초기에 발생할 수 있는 휨 현상을 제거할 수 있고, 산정과 플랭크에서 요구되는 각각의 특장점에 맞추어 상기 산정의 프로파일과 상기 골밑의 프로파일을 각기 달리 설계적용하여, 수명이 향상되고 고품질의 암나사를 형성할 수 있는 나사전조탭에 대한 것이다.The present invention relates to a thread rolled tap for forming a female thread by plastically processing a material, and more particularly, a thread rolled thread including a threaded portion formed along an outer surface thereof and having a tapered chamfer portion and a parallel portion extending from the chamfer portion. In the tab, the chamfer portion is formed in front of the chamfer portion in contact with the surface of the through-hole of the material and comprises a guide portion having a predetermined width for guiding the thread-rolled tab into the through hole, the guide portion is a thread of the chamfer portion First, when the screw thread of the chamfer portion contacts the surface of the through hole and is not spaced apart from the surface of the through hole when the thread of the chamfer portion contacts the surface of the through hole, it is possible to eliminate the warpage phenomenon that may occur at the initial stage of entry. The profile and the profile of the calculation according to the respective To each different design applied to the bottom of the profile, is for the thread rolling tab in life can be improved and formed a high quality of the female thread.
나사전조탭은 소재를 소성가공하여 암나사를 제조하는 공구로 다양한 형태와 특성을 가지도록 개발되어 현재 널리 사용되고 있다. 도 1은 종래의 나사전조탭을 사용하여 암나사를 제조하는 방법을 설명하기 위한 참고도이고, 도 2는 종래의 나사전조탭의 챔퍼부에서 나사산의 배열을 설명하기 위한 참고도이고, 도 3은 종래의 다른 나사전조탭의 챔퍼부에서 나사산의 배열을 설명하기 위한 참고도이고, 도 4는 나사전조탭의 중심에서 산정 및 골밑의 반지름 방향으로의 거리변화를 설명하기 위한 참고도인데, 도 1 내지 4를 참조하여 상기 나사전조탭과 암나사를 제조하는 방법을 살펴보면, 도 1에 도시된 바와 같이 소재(100)의 관통홀(110) 내에 나사전조탭(200)을 삽입하고, 상기 나사전조탭(200)을 회전, 전진시키면 상기 나사전조탭(200)의 외측에 형성된 나사산(210)이 상기 소재(100)의 관통홀(110) 표면을 가압하여 소재(100)를 소성변형시켜 상기 관통홀(110) 표면에는 상기 나사전조탭(200)의 나사산(210)에 대응하는 암나사산이 형성되어 암나사가 제조되게 된다.Thread rolled tap is a tool for manufacturing female thread by plastic processing of material and has been developed to have various shapes and characteristics. 1 is a reference diagram for explaining a method of manufacturing a female screw using a conventional thread rolled tap, Figure 2 is a reference diagram for explaining the arrangement of threads in the chamfer portion of a conventional thread rolled tap, Figure 3 Figure 4 is a reference diagram for explaining the arrangement of threads in the chamfer portion of another conventional thread rolled tap, Figure 4 is a reference diagram for explaining the distance from the center of the thread rolled tap to the radial direction of the valley, Figure 1 Referring to the method for manufacturing the screw rolling tab and the female thread with reference to 4 to 4, the thread rolling tab 200 is inserted into the through hole 110 of the material 100, as shown in Figure 1, the screw rolling tab When the 200 is rotated and advanced, the thread 210 formed on the outer side of the thread rolled tab 200 pressurizes the surface of the through hole 110 of the material 100 to plastically deform the material 100 so that the through hole is formed. 110, the surface of the thread rolled tab 200 Acid female screw corresponding to stillbirth 210 is formed to be the female screw is manufactured.
하지만, 도 1 내지 3에 도시된 바와 같이, 종래의 나사전조탭(200)의 상기 관통홀(110) 내로의 인입 초기에는, 즉 상기 나사산(210)이 상기 관통홀(110) 표면에 처음 접촉시 상기 나사전조탭(200)은 상기 관통홀(110)의 표면에서 이격되어 위치하여 상기 나사전조탭(200)과 상기 관통홀(110) 표면 사이에는 공간(S)이 발생하게 된다. 그 후 상기 나사전조탭(200)을 회전시켜 상기 관통홀(110) 내로 계속 인입시키면, 상기 나사전조탭(200)은 상기 관통홀(110)에 수평으로 인입되지 않고 휨이 발생하여 상기 나사전조탭(200)의 중심이 상기 관통홀(110) 중심에 이탈하게 된다. 이 이탈 정도는 상기 소재(100)의 관통홀(110)의 깊이가 길어질수록 심화되고 상기 나사전조탭(200)의 중심이 상기 관통홀(110) 중심에서 이탈하게 됨에 따라 상기 관통홀(110) 표면의 한쪽에서는 미소성이 발생하고 다른 한쪽에서는 과소성이 발생하여 상기 나사전조탭(200)에 과도한 토오크가 걸려 나사전조탭(200)의 손상과 암나사를 뜯어먹는 현상이 발생하고 제조된 암사나의 품질이 저하되는 문제가 있다.However, as shown in FIGS. 1 to 3, at the beginning of the introduction of the conventional thread rolled tab 200 into the through hole 110, that is, the thread 210 first contacts the surface of the through hole 110. The screw rolling tab 200 is spaced apart from the surface of the through hole 110 so that a space S is generated between the screw rolling tab 200 and the surface of the through hole 110. Thereafter, when the screw rolled tab 200 is continuously inserted into the through hole 110, the screw rolled tab 200 is not horizontally drawn into the through hole 110 and a warpage occurs, thereby causing the screw rolled. The center of the tab 200 is separated from the center of the through hole 110. The degree of separation is deepened as the depth of the through hole 110 of the material 100 increases, and as the center of the screw rolled tab 200 is separated from the center of the through hole 110, the through hole 110. On one side of the surface, unbaking occurs and on the other side, undersizing occurs and excessive torque is applied to the screw rolling tab 200, thereby causing damage to the screw rolling tab 200 and eating of the female screw. There is a problem that the quality is degraded.
또한, 종래의 나사전조탭(200)은 나사산(210)의 산정(211)과 플랭크(212)에서 요구되는 특성이 다름에도 이를 간과하여, 도 4에서 확인할 수 있는 바와 같이 산정(211)의 프로파일과 골밑(213)의 프로파일이 동일하게 형성되어 제조된 나사전조탭의 품질이 저하되는 문제가 있다.In addition, the conventional thread rolled tap 200 is overlooked even if the characteristics required by the calculation 211 and the flank 212 of the screw thread 210, the profile of the calculation 211 as can be seen in Figure 4 There is a problem in that the quality of the thread rolled tab manufactured by forming the same profile of the grooves and the valleys 213 is the same.
본 발명은 상기와 같은 문제점을 해결하기 위해 안출된 것으로,The present invention has been made to solve the above problems,
본 발명은 수명이 향상되고 고품질의 암나사를 형성할 수 있는 나사전조탭을 제공하는데 그 목적이 있다.SUMMARY OF THE INVENTION An object of the present invention is to provide a thread rolled tab capable of improving the life and forming a high quality internal thread.
또한, 본 발명은 챔퍼부의 전방에 연이어 형성되어 소재의 관통홀 표면에 접촉하여 상기 나사전조탭을 상기 관통홀 내로 가이드하는 소정의 폭을 가진 가이드부를 포함하며, 상기 가이드부는 상기 챔퍼부의 나사산보다 먼저 상기 관통홀 표면에 접촉하여 상기 챔퍼부의 나사산이 상기 관통홀 표면에 처음 접촉시 상기 챔퍼부가 상기 관통홀의 표면에서 이격되어 위치하지 않도록 하여 인입 초기에 발생할 수 있는 휨 현상을 제거할 수 있는 나사전조탭을 제공하는데 그 목적이 있다.In addition, the present invention includes a guide portion formed in front of the chamfer portion having a predetermined width in contact with the surface of the through hole of the material to guide the screw rolling tab into the through hole, wherein the guide portion is formed before the thread of the chamfer portion. When the thread of the chamfer portion contacts the surface of the through hole in contact with the surface of the through hole for the first time, the chamfer portion is not spaced apart from the surface of the through hole to remove the bending phenomenon that may occur at the beginning of the insertion. The purpose is to provide.
또한, 본 발명은 산정과 플랭크에서 각각의 요구되는 특장점에 맞추어 상기 산정의 프로파일과 상기 골밑의 프로파일을 각기 달리 설계적용하여 향상된 품질을 제공할 수 있는 나사전조탭을 제공하는데 그 목적이 있다.It is also an object of the present invention to provide a thread rolled tap that can provide improved quality by differently designing the profile of the top profile and the profile of the subsurface according to the respective desired features on the top and the flank.
또한, 본 발명은 산정돌출부의 곡률반경은 작게 하여 나사전조탭과 소재의 마찰저항을 줄이고, 산정여유부의 곡률반경은 크게 하여 윤활유 침투를 용이하게 할 수 있는 나사전조탭과 그 제조방법을 제공하는데 그 목적이 있다.In addition, the present invention provides a screw rolled tap and a method of manufacturing the same, which can reduce the frictional resistance between the screw rolled tab and the material by reducing the radius of curvature of the projection protrusion, and facilitate the penetration of lubricant by increasing the radius of curvature of the calculated margin. The purpose is.
또한, 본 발명은 골밑돌출부의 곡률반경은 크게 하여 나사산의 강성을 증대시키고 유효경 측정을 용이하게 하며 소재를 원활이 유동시킬 수 있고, 골밑여유부의 곡률반경은 작게하여 나사전조탭의 제조시 제거하여야 할 부분을 줄일 수 있어 제조시 발생하는 열을 최소화하고 제조시간을 단축할 수 있는 나사전조탭을 제공하는데 그 목적이 있다.In addition, the present invention has to increase the radius of curvature of the subproximal protrusion to increase the stiffness of the thread, facilitate the effective diameter measurement and smoothly flow the material, the radius of curvature of the subproximal margin should be removed during the manufacture of the thread rolled tab It is an object of the present invention to provide a thread rolled tap that can reduce the number of parts to minimize heat generated during manufacturing and shorten the manufacturing time.
본 발명은 앞서 본 목적을 달성하기 위해서 다음과 같은 구성을 가진 실시예에 의해서 구현된다.The present invention is implemented by the embodiment having the following configuration to achieve the above object.
본 발명의 일 실시예에 따르면, 본 발명에 따른 나사전조탭은 외면을 따라 나사산이 형성되고, 테이퍼진 챔퍼부와 상기 챔퍼부에서 연장되는 평행부를 가진 나사산부를 포함하는 나사전조탭에 있어서, 상기 챔퍼부는 챔퍼부의 전방에 연이어 형성되어 소재의 관통홀 표면에 접촉하여 상기 나사전조탭을 상기 관통홀 내로 가이드하는 소정의 폭을 가진 가이드부를 포함하며, 상기 가이드부는 상기 챔퍼부의 나사산보다 먼저 상기 관통홀 표면에 접촉하므로, 상기 챔퍼부의 나사산이 상기 관통홀 표면에 처음 접촉시 상기 챔퍼부가 상기 관통홀의 표면에서 이격되어 위치하지 않는 것을 특징으로 한다.According to an embodiment of the present invention, the thread rolling tab according to the present invention has a threaded thread formed along an outer surface, and includes a threaded portion having a tapered chamfer portion and a parallel portion extending from the chamfer portion, wherein The chamfer portion is formed in front of the chamfer portion and includes a guide portion having a predetermined width that contacts the surface of the through hole of the material and guides the screw rolled tab into the through hole, wherein the guide portion has the through hole before the thread of the chamfer portion. Since the chamfer portion is in contact with the surface, the chamfer portion is not located away from the surface of the through hole when the thread of the chamfer portion first contacts the through hole surface.
본 발명의 다른 실시예에 따르면, 본 발명에 따른 나사전조탭에 있어서 상기 가이드부는 상기 관통홀 표면의 형상에 대응되는 형상을 가지며, 120 내지 360도의 가이드형성각을 가지는 지점까지 형성되는 것을 특징으로 한다.According to another embodiment of the present invention, in the thread rolling tab according to the present invention, the guide portion has a shape corresponding to the shape of the surface of the through hole, and is formed to a point having a guide forming angle of 120 to 360 degrees. do.
본 발명의 또 다른 실시예에 따르면, 본 발명에 따른 나사전조탭은 외면을 따라 나사산이 형성되고, 테이퍼진 챔퍼부와 상기 챔퍼부에서 연장되는 평행부를 가진 나사산부를 포함하는 나사전조탭에 있어서, 상기 나사산부는 상기 나사산에서 외측방향으로 나사산을 따라 소정 간격을 두고 돌출되는 복수 개의 산정돌출부와, 인접하는 상기 산정돌출부를 연결하는 산정여유부와, 나사골에서 외측방향으로 나사골을 따라 소정의 간격을 두고 돌출되는 복수 개의 골밑돌출부와, 인접하는 상기 골밑돌출부를 연결하는 골밑여유부를 포함하며, 상기 산정돌출부의 곡률반경은 상기 골밑돌출부의 곡률반경보다 더 작은 값을 가지고, 상기 산정여유부의 곡률반경은 상기 골밑여유부의 곡률반경보다 더 큰 값을 가지는 것을 특징으로 한다.According to still another embodiment of the present invention, a thread rolling tab according to the present invention has a threaded thread formed along an outer surface thereof and includes a tapered chamfer portion and a threaded portion having a parallel portion extending from the chamfer portion. The screw portion has a plurality of projection protrusions protruding at predetermined intervals along the thread in the outer direction from the screw thread, a calculation margin connecting the adjacent projection projections, and a predetermined interval along the screw bones outward from the screw bone. A plurality of protruding subconvex protrusions and a subsurface margin connecting the adjacent subproximal protrusions, wherein the radius of curvature of the calculation protrusion has a smaller value than the radius of curvature of the proximal protrusion, and the radius of curvature of the calculation margin is Characterized in that it has a larger value than the radius of curvature of the marginal free space.
본 발명의 또 다른 실시예에 따르면, 본 발명에 따른 나사전조탭에 있어서 상기 산정돌출부의 곡률반경은 0.4 내지 0.7 피치의 값을 가지며, 상기 골밑돌출부의 곡률반경은 0.8 내지 1.5 피치의 값을 가지고, 상기 산정여유부의 접선각은 14 내지 18도의 값을 가지며, 상기 골밑여유부의 접선각은 9도 내지 13도의 값을 가지는 것을 특징으로 한다.According to another embodiment of the present invention, in the thread rolled tap according to the present invention, the radius of curvature of the calculation protrusion has a value of 0.4 to 0.7 pitch, and the radius of curvature of the subprotrusion has a value of 0.8 to 1.5 pitch. The tangent angle of the calculation margin has a value of 14 to 18 degrees, and the tangent angle of the subliminal margin has a value of 9 to 13 degrees.
본 발명의 또 다른 실시예에 따르면, 본 발명에 따른 나사전조탭에 있어서 상기 나사산부는 상기 나사산에서 외측으로 나사산을 따라 소정 간격을 두고 돌출되는 복수 개의 산정돌출부와, 인접하는 상기 산정돌출부를 연결하는 산정여유부와, 나사골에서 외측으로 나사골을 따라 소정의 간격을 두고 돌출되는 복수 개의 골밑돌출부와, 인접하는 상기 골밑돌출부를 연결하는 골밑여유부를 포함하며, 상기 산정돌출부의 곡률반경은 상기 골밑돌출부의 곡률반경보다 더 작은 값을 가지고, 상기 산정여유부의 곡률반경은 상기 골밑여유부의 곡률반경보다 더 큰 값을 가지는 것을 특징으로 한다.According to another embodiment of the present invention, in the thread rolling tab according to the present invention, the threaded portion connects a plurality of protrusions protruding at predetermined intervals along the threads from the threads to the outside, and connecting the adjacent protrusions. And a calculation margin, a plurality of subconvex protrusions protruding at a predetermined interval along the screw bone from the screw bone to the outside, and a subsurface margin connecting the adjacent subproximal protrusions, and the radius of curvature of the estimating protrusion is It has a smaller value than the radius of curvature, and the radius of curvature of the calculation margin is characterized in that it has a larger value than the radius of curvature of the subsidence margin.
본 발명은 앞서 본 실시예와 하기에서 설명할 구성과 결합, 사용관계에 의해 다음과 같은 효과를 얻을 수 있다.The present invention can achieve the following effects by the configuration and combination, the use relationship described above in the present embodiment.
본 발명은 수명이 향상되고 고품질의 암나사를 형성할 수 있는 나사전조탭을 제공할 수 있는 효과가 있다.The present invention has the effect that it is possible to provide a thread rolled tab that can improve the life and form a high-quality female thread.
또한, 본 발명은 챔퍼부의 전방에 연이어 형성되어 소재의 관통홀 표면에 접촉하여 상기 나사전조탭을 상기 관통홀 내로 가이드하는 소정의 폭을 가진 가이드부를 포함하며, 상기 가이드부는 상기 챔퍼부의 나사산보다 먼저 상기 관통홀 표면에 접촉하여 상기 챔퍼부의 나사산이 상기 관통홀 표면에 처음 접촉시 상기 챔퍼부가 상기 관통홀의 표면에서 이격되어 위치하지 않도록 하여 인입 초기에 발생할 수 있는 휨 현상을 제거할 수 있는 효과가 있다.In addition, the present invention includes a guide portion formed in front of the chamfer portion having a predetermined width in contact with the surface of the through hole of the material to guide the screw rolling tab into the through hole, wherein the guide portion is formed before the thread of the chamfer portion. When the thread of the chamfer portion is in contact with the surface of the through-hole and the chamfer portion first contacts the surface of the through-hole, the chamfer portion is not spaced apart from the surface of the through-hole, thereby eliminating a warpage phenomenon that may occur at the initial stage of entry. .
또한, 본 발명은 산정과 플랭크에서 각각 요구되는 특장점에 맞추어 상기 산정의 프로파일과 상기 골밑의 프로파일을 각기 달리 설계적용하여 향상된 품질을 가지는 효과가 있다.In addition, the present invention has the effect of having an improved quality by differently designing the profile of the top profile and the profile of the subsurface according to the features required in the top and the flank respectively.
또한, 본 발명은 산정돌출부의 곡률반경은 작게 하여 나사전조탭과 소재의 마찰저항을 줄이고, 산정여유부의 곡률반경은 크게 하여 윤활유 침투를 용이하게 할 수 있는 효과가 있다.In addition, the present invention has an effect of reducing the radius of curvature of the projection projection portion to reduce the frictional resistance between the thread rolling tab and the material, and to increase the radius of curvature of the calculation margin portion to facilitate lubricating oil penetration.
또한, 본 발명은 골밑돌출부의 곡률반경은 크게 하여 나사산의 강성을 증대시키고 유효경 측정을 용이하게 하며 소재를 원활이 유동시킬 수 있고, 골밑여유부의 곡률반경은 작게하여 나사전조탭의 제조시 제거하여야 할 부분을 줄일 수 있어 제조시 발생하는 열을 최소화하고 제조시간을 단축할 수 있는 효과가 있다.In addition, the present invention has to increase the radius of curvature of the subproximal protrusion to increase the stiffness of the thread, facilitate the effective diameter measurement and smoothly flow the material, the radius of curvature of the subproximal margin should be removed during the manufacture of the thread rolled tab Since the part to be reduced can be minimized, heat generated during manufacturing can be minimized and manufacturing time can be shortened.
도 1은 종래의 나사전조탭을 사용하여 암나사를 제조하는 방법을 설명하기 위한 참고도.1 is a reference diagram for explaining a method of manufacturing a female screw using a conventional thread rolled tap.
도 2는 종래의 나사전조탭의 챔퍼부에서 나사산의 배열을 설명하기 위한 참고도.Figure 2 is a reference diagram for explaining the arrangement of the threads in the chamfer portion of the conventional thread rolling tab.
도 3은 종래의 다른 나사전조탭의 챔퍼부에서 나사산의 배열을 설명하기 위한 참고도.Figure 3 is a reference diagram for explaining the arrangement of threads in the chamfer portion of another conventional thread rolled tap.
도 4는 종래의 나사전조탭의 중심에서 산정 및 골밑의 반지름 방향으로의 거리변화를 설명하기 위한 참고도.Figure 4 is a reference diagram for explaining the distance change in the radial direction of the calculation and the valley from the center of the conventional thread rolling tab.
도 5는 본 발명의 일 실시예에 따른 나사전조탭의 사시도.5 is a perspective view of a screw rolling tab according to an embodiment of the present invention.
도 6은 도 5의 A-A선으로 절단한 나사전조탭의 부분절단 사시도.6 is a partially cutaway perspective view of the thread rolling tab cut along the line A-A of FIG.
도 7은 도 5의 B-B선의 단면도.FIG. 7 is a sectional view taken along the line B-B in FIG. 5; FIG.
도 8은 도 5의 C-C선의 단면도.8 is a cross-sectional view taken along the line C-C in FIG.
도 9는 본 발명의 일 실시예에 따른 나사전조탭을 사용하여 암나사를 제조하는 방법을 설명하기 위한 참고도.9 is a reference diagram for explaining a method of manufacturing a female screw using a thread rolled tap according to an embodiment of the present invention.
도 10은 본 발명의 일 실시예에 따른 나사전조탭의 중심에서 산정 및 골밑의 반지름 방향으로의 거리변화를 설명하기 위한 참고도.Figure 10 is a reference diagram for explaining the distance change in the radial direction of the calculation and the valley from the center of the screw rolled tap according to an embodiment of the present invention.
도 11은 본 발명의 일 실시예에 따른 나사전조탭의 챔퍼부에서 나사산의 배열을 설명하기 위한 참고도.Figure 11 is a reference diagram for explaining the arrangement of the threads in the chamfer portion of the thread rolling tab according to an embodiment of the present invention.
*도면에 사용되는 주요부호에 대한 설명* Description of the main symbols used in the drawings
1: 자루 2: 나사산부 21: 나사산1: bag 2: thread 21: thread
22: 챔퍼부 23: 평행부 24: 산정돌출부22: chamfer 23: parallel 24: top projection
25: 산정여유부 26: 골밑돌출부 27: 골밑여유부25: counting margin 26: subtalar projections 27: subtal margin
100: 소재 110: 관통홀 211: 산정100: material 110: through hole 211: calculation
212: 플랭크 213: 골밑 221: 가이드부212: flank 213: rib 221: guide part
이하에서는 본 발명에 따른 나사전조탭을 첨부된 도면을 참조하여 상세히 설명한다. 도면들 중 동일한 구성요소들은 가능한 한 어느 곳에서든지 동일한 부호들로 나타내고 있음에 유의해야 한다. 특별한 정의가 없는 한 본 명세서의 모든 용어는 본 발명이 속하는 기술분야의 통상의 지식을 가진 기술자가 이해하는 당해 용어의 일반적 의미와 동일하고 만약 본 명세서에 사용된 용어의 의미와 충돌하는 경우에는 본 명세서에 사용된 정의에 따른다.Hereinafter, with reference to the accompanying drawings, the thread rolling tab according to the present invention will be described in detail. It should be noted that the same elements in the figures are represented by the same numerals wherever possible. Unless otherwise defined, all terms in this specification are equivalent to the general meaning of the terms understood by those of ordinary skill in the art to which the present invention pertains and, if they conflict with the meanings of the terms used herein, Follow the definition used in the specification.
도 5는 본 발명의 일 실시예에 따른 나사전조탭의 사시도이고, 도 6은 도 5의 A-A선으로 절단한 나사전조탭의 부분절단 사시도이고, 도 7은 도 5의 B-B선의 단면도이고, 도 8은 도 5의 C-C선의 단면도이고, 도 9는 본 발명의 일 실시예에 따른 나사전조탭을 사용하여 암나사를 제조하는 방법을 설명하기 위한 참고도이고, 도 10은 본 발명의 일 실시예에 따른 나사전조탭의 중심에서 산정 및 골밑의 반지름 방향으로의 거리변화를 설명하기 위한 참고도이고, 도 11은 본 발명의 일 실시예에 따른 나사전조탭의 챔퍼부에서 나사산의 배열을 설명하기 위한 참고도이다.5 is a perspective view of a screw rolling tab according to an embodiment of the present invention, Figure 6 is a partial cutaway perspective view of the screw rolling tab cut by the line AA of Figure 5, Figure 7 is a cross-sectional view of the line BB of Figure 5, 8 is a cross-sectional view taken along line CC of FIG. 5, FIG. 9 is a reference diagram for explaining a method of manufacturing a female screw using a thread rolled tap according to an embodiment of the present invention, and FIG. 10 is an embodiment of the present invention. Figure 11 is a reference diagram for explaining the distance from the center of the thread rolling tab according to the calculation and the radial direction of the valley, Figure 11 is for explaining the arrangement of the threads in the chamfer portion of the screw rolling tab according to an embodiment of the present invention See also.
도 5 내지 11을 참조하면, 본 발명의 일 실시예에 따른 나사전조탭은 자루(1)와, 상기 자루(1)에서 연장되며 외면을 따라 나사산(21)이 형성되어 소재(100)에 암나사산을 형성하기 위해 구비된 나사산부(2)를 포함한다.5 to 11, the thread rolling tab according to an embodiment of the present invention is a bag (1), and extends from the bag (1) and the thread 21 is formed along the outer surface of the female material 100 And a threaded portion 2 provided for forming the threaded portion.
상기 나사전조탭을 설명함에 있어, 본 명세서에서는 나사산부(2)가 위치하는 방향을 선단방향으로 표현하고, 자루(1)가 위치하는 방향을 후단방향으로 표현하기로 한다.In the description of the screw rolled tab, in the present specification, the direction in which the threaded portion 2 is located is represented by the front end direction, and the direction in which the bag 1 is located in the rear end direction.
상기 나사산부(2)는 테이퍼진 챔퍼부(22)와, 상기 챔퍼부(22)에서 연장되는 평행부(23)를 포함한다. 상기 챔퍼부(22)에는 테이퍼지게 배열된 나사산이 형성되며, 상기 평행부(23)에는 상기 챔퍼부(22)의 나사산에서 연속적으로 연장되는 평행하게 배열된 나사산이 형성된다. 상기 챔퍼부(22)는 실질적으로 소재(100)에 암나사산이 형성되도록 소성가공하며, 상기 평행부(23)는 상기 챔퍼부(22)에 의해 상기 소재(100)에 형성된 암나사산을 다듬질하는 역할과 상기 나사전조탭이 상기 소재 내에서 진행의 직진성을 유지하도록 한다.The threaded portion 2 includes a tapered chamfer portion 22 and a parallel portion 23 extending from the chamfer portion 22. Tapered threads are formed in the chamfer portion 22, and parallel portions 23 are formed in parallel threads extending continuously from the threads of the chamfer portion 22. The chamfer 22 is plastically processed to substantially form a female thread on the material 100, and the parallel portion 23 serves to trim the female thread formed on the material 100 by the chamfer 22. And the thread rolled tab maintain the straightness of travel within the material.
상기 챔퍼부(22)는 챔퍼부(22)의 전방에 연이어 형성되어 소재(100)의 관통홀(110) 표면에 접촉하여 상기 나사전조탭을 상기 관통홀(110) 내로 가이드하는 소정의 폭을 가진 가이드부(221)를 포함하며, 상기 가이드부(221)는 상기 챔퍼부(22)의 나사산보다 먼저 상기 관통홀(110) 표면에 접촉하여 상기 챔퍼부(22)의 나사산이 상기 관통홀(110) 표면에 접촉시 상기 챔퍼부(22)가 상기 관통홀(110)의 표면에서 이격되어 위치하지 않도록 한다.The chamfer portion 22 is formed in front of the chamfer portion 22 in contact with the surface of the through hole 110 of the material 100 to guide a predetermined width for guiding the screw rolling tab into the through hole 110. And a guide part 221, wherein the guide part 221 contacts the surface of the through hole 110 before the thread of the chamfer part 22, so that the thread of the chamfer part 22 is formed in the through hole ( 110, the chamfer 22 is not positioned to be spaced apart from the surface of the through hole 110 when the surface is in contact with the surface.
상기 가이드부(221)는 상기 챔퍼부(22)의 나사산보다 선단 방향에 위치하며, 일정형상을 가지나 바람직하게는 도 5, 6 및 8에 도시된 바와 같이 상기 소재(100)의 관통홀(110) 표면에 대응하는 형상을 가지며, 소정의 폭(W)을 가지고 나사산이 시작되는 위치(P)로부터 반대방향으로 120 내지 360도의 가이드형성각(α)을 가지는 지점까지 형성되어 반경(R)이 상기 소재(100)의 관통홀(110) 반경과 동일한 길이를 가지는 것이 바람직하다. 상기 가이드형성각(α)은 상기 나사전조탭의 중앙점(Q)에서 외측방향으로 상기 가이드부(221)의 시작지점(T)과 종료지점(U))에 두 개의 선을 그었을 때, 양 선(a1, a2)이 이루는 각으로 정의하기로 한다.The guide portion 221 is located in the tip direction than the screw thread of the chamfer portion 22, and has a predetermined shape, but preferably through holes 110 of the material 100 as shown in Figures 5, 6 and 8 ) Has a shape corresponding to the surface, and has a predetermined width (W) and is formed from the position (P) where the thread starts to have a guide formation angle (α) of 120 to 360 degrees in the opposite direction, so that the radius (R) It is preferable to have the same length as the radius of the through-hole 110 of the material 100. The guide formation angle α is positive when two lines are drawn at the start point T and the end point U of the guide part 221 in the outward direction from the center point Q of the thread rolling tab. The angle formed by the lines a1 and a2 will be defined.
도 9를 참조하여 상기 나사전조탭의 상기 관통홀(110) 내로의 인입과정을 살펴보면, 상기 나사전조탭을 상기 관통홀(110) 내로 삽입하면, 상기 챔퍼부(22)의 가이드부(221)는 상기 챔퍼부(22)의 나사산보다 선단 방향에 위치하므로 상기 가이드부(221)는 상기 챔퍼부(22)의 나사산보다 먼저 상기 관통홀(110) 표면에 접촉하여 상기 나사전조탭을 가이드한다. 상기 가이드부(221)가 상기 관통홀(110) 표면에 접촉하여 상기 나사전조탭을 가이드하므로, 상기 챔퍼부(22)의 나사산이 상기 관통홀(110) 표면에 처음 접촉시에도 상기 챔퍼부(22)가 상기 관통홀(110) 표면에서 이격되어 위치하지 않게 된다. 따라서, 상기 나사전조탭은 종래기술과 달리 인입초기에 휨 현상이 발생하지 않아, 나사전조탭이 소재(100)의 관통홀(110)에 진입완료 하였을 때 완성된 암나사가 미소성되거나 과소성되는 부분이 없어 뛰어난 품질의 암나사를 제조할 수 있고, 상기 나사전조탭에는 과도한 토오크가 걸리지 않으므로 향상된 수명을 가지게 된다.Referring to FIG. 9, when the screw rolling tab is inserted into the through hole 110, the thread rolling tab is inserted into the through hole 110. The guide part 221 of the chamfer portion 22 is inserted into the through hole 110. Since the guide portion 221 is located in the front end direction than the thread of the chamfer 22, the guide portion 221 contacts the surface of the through hole 110 before the thread of the chamfer 22 to guide the screw rolling tab. Since the guide part 221 contacts the surface of the through hole 110 to guide the screw rolling tab, even when the thread of the chamfer 22 contacts the surface of the through hole 110 for the first time, the chamfer part ( 22 may not be spaced apart from the surface of the through hole 110. Therefore, unlike the prior art, the thread rolled tab does not generate warpage at the beginning of the drawing, and when the thread rolled tap enters the through-hole 110 of the material 100, the finished female thread is unbaked or under-baked. Since there is no part, an excellent quality internal thread can be manufactured, and the screw rolled tab does not take excessive torque, and thus has an improved service life.
상기 나사산부(2)는 상기 나사산에서 외측방향으로 나사산을 따라 소정 간격을 두고 돌출되는 복수 개의 산정돌출부(crest lobe, 24)와, 인접하는 상기 산정돌출부(24)를 연결하는 산정여유부(crest relief, 25)와, 나사골에서 외측방향으로 나사골을 따라 소정의 간격을 두고 돌출되는 복수 개의 골밑돌출부(root lobe, 26)와, 인접하는 상기 골밑돌출부(26)를 연결하는 골밑여유부(root relief, 27)를 추가로 포함한다. 상기 나사산부(2)에는 산정돌출부(24), 산정여유부(25), 골밑돌출부(26) 및 골밑여유부(27)가 형성되므로, 상기 나사산부(2)를 나사산 루트를 따라 절단하였을 때 그 단면의 모양이 다각형의 형상을 가지게 된다. 예컨대, 상기 나사산부(2)의 그 단면의 형상은 도 7에 도시된 바와 같이 육각형 형상을 가질 수 있다. 상기 산정돌출부(24)는 소재(100)의 암나사산을 형성하기 위해 관통홀(110) 표면을 가압하여 상기 소재(100)를 소성변형시킨다. The threaded portion 2 includes a plurality of crest lobes 24 protruding at predetermined intervals along the threads in an outward direction from the threads, and a crest margin connecting a plurality of crest lobes 24 adjacent thereto. relief 25, a root relief connecting the plurality of root lobes 26 protruding at predetermined intervals along the screw bone outwardly from the screw bone, and the root relief connecting the adjacent subproximal protrusions 26. , 27). The threaded portion 2 is formed with a projection protrusion 24, a calculation margin 25, a subproximal protrusion 26 and a subosseous margin 27, so when the threaded portion 2 is cut along the thread root The cross section has a polygonal shape. For example, the cross-sectional shape of the threaded portion 2 may have a hexagonal shape as shown in FIG. 7. The top projection 24 pushes the surface of the through hole 110 to form a female thread of the material 100 to plastically deform the material 100.
상기 산정돌출부(24)의 곡률반경은 상기 골밑돌출부(26)의 곡률반경보다 더 작은 값을 가지고, 상기 산정여유부(25)의 곡률반경은 상기 골밑여유부(27)의 곡률반경보다 더 큰 값을 가지며, 바람직하게는 상기 산정돌출부(24)의 곡률반경은 0.4 내지 0.7 피치의 값을 가지며, 상기 골밑돌출부(26)의 곡률반경은 0.8 내지 1.5 피치의 값을 가지고, 상기 산정여유부(25)의 접선각(β)은 14 내지 18도의 값을 가지며, 상기 골밑여유부(27)의 접선각(γ)은 9도 내지 13도의 값을 가진다. The radius of curvature of the estimate protrusion 24 has a smaller value than the radius of curvature of the subproximal protrusion 26, and the radius of curvature of the estimate margin 25 is greater than the radius of curvature of the substep recess 27. It has a value, preferably the radius of curvature of the calculation protrusion 24 has a value of 0.4 to 0.7 pitch, the radius of curvature of the subprotrusion protrusion 26 has a value of 0.8 to 1.5 pitch, the calculation margin ( The tangent angle β of 25) has a value of 14 to 18 degrees, and the tangent angle γ of the subliminal margin 27 has a value of 9 degrees to 13 degrees.
상기 산정돌출부(24)의 곡률반경을 작게 하면 소재의 가압부하가 낮아지며 상기 산정돌출부(24)의 상기 소재(100)와의 접촉면적을 줄일 수 있어 상기 나사전조탭과 상기 소재(100)의 마찰저항을 줄일 수 있고, 상기 골밑돌출부(26)의 곡률반경을 크게 하면 상기 골밑돌출부(26)는 상대적으로 완만한 곡선으로 형성되어 나사산의 강성을 증대시킬 수 있고 유효경 측정이 용이하고 소재의 오버 플로우시(과소성) 소재(100)를 원활하게 유동시킬 수 있으며, 상기 산정여유부(25)의 곡률반경을 크게 하면 소재(100)와의 접촉면적이 줄어들게 되어 윤활유 침투를 용이하게 할 수 있고, 상기 골밑여유부(27)의 곡률반경이 작은 경우 상기 나사전조탭의 제조시 연삭으로 제거하여야 할 부분을 줄일 수 있어 제조시 발생하는 열을 최소화하고 제조시간을 단축할 수 있으므로, 상기 나사전조탭은 산정(211)과 플랭크(212)에서 요구되는 특장점에 맞추어, 상기 산정(211)의 프로파일과 상기 골밑(213)의 프로파일을 각각 다르게 설계하여 향상된 품질을 제공할 수 있는 특징이 있다. 예컨대, 본 발명에 따른 나사전조탭은 도 10에 도시된 바와 같이 각각 다르게 설계된 상기 산정(211)의 프로파일과 상기 골밑(213)의 프로파일을 가지질 수 있다. If the radius of curvature of the top projection 24 is reduced, the pressure load of the material is lowered, and the contact area of the top projection 24 with the material 100 can be reduced, so that the frictional resistance between the screw rolled tab and the material 100 is reduced. When the radius of curvature of the subproximal protrusion 26 is increased, the subproximal protrusion 26 is formed in a relatively gentle curve to increase the rigidity of the thread, and the effective diameter measurement is easy, and when the material overflows. (Unbaked) The material 100 can be smoothly flowed, and if the radius of curvature of the calculation margin portion 25 is increased, the contact area with the material 100 is reduced to facilitate the penetration of lubricant oil, When the radius of curvature of the margin portion 27 is small, since the portion to be removed by grinding in the manufacture of the thread rolled tab can be reduced, heat generated during manufacturing can be minimized and manufacturing time can be shortened. The thread rolled tab has a feature that can provide an improved quality by designing the profile of the peak 211 and the profile of the valley 213 differently according to the features required by the peak 211 and the flank 212. have. For example, the thread roll tab according to the present invention may have a profile of the calculation 211 and a profile of the sub-golche 213, which are designed differently as shown in FIG.
도 11은 상기 챔퍼부(22)의 길이가 1 피치를 가지고 상기 나사산부(2)를 나사산(21) 루트를 따라 절단하였을 때 그 단면의 모양이 육각형을 가지는 것을 상정하여 본 발명에 따른 나사전조탭의 챔퍼부(22)의 나사산(21)의 배열을 나타낸 도면인데, 도 5 내지 11을 참조하여 챔퍼부(22)의 나사산(21)의 배열을 살펴보면, 도 11의 (a)에 표시된 바와 같이 상기 챔퍼부(22)의 선단에는 상기 소재(100)의 관통홀(110) 직경과 일치하는 직경을 가지는 가이드부(221)가 형성되고, 상기 나사산(21)에는 상기 평행부(23)쪽으로 60도 간격으로 여섯 개의 산정돌출부(24)가 형성된다. 상기 산정돌출부(24)는 상기 평행부(23) 쪽에 가까울수록 산정의 높이(h1)가 커지고 골밑의 깊이(h2)가 깊어지게 된다. 11 is a screw rolling according to the present invention, assuming that the length of the chamfer portion 22 has a pitch and the threaded portion 2 is cut along the root of the threaded portion 21, the cross section having a hexagonal shape. The arrangement of the threads 21 of the chamfer portion 22 of the tab is described. Referring to FIGS. 5 to 11, the arrangement of the threads 21 of the chamfer portion 22 is shown in FIG. 11A. As described above, a guide part 221 having a diameter corresponding to a diameter of the through hole 110 of the material 100 is formed at the tip of the chamfer part 22, and the thread 21 is directed toward the parallel part 23. Six mountain peaks 24 are formed at intervals of 60 degrees. The closer the closer to the parallel portion 23, the larger the height h1 of the peak becomes and the depth h2 of the valley becomes deeper.
이상에서, 출원인은 본 발명의 다양한 실시예들을 설명하였지만, 이와 같은 실시예들은 본 발명의 기술적 사상을 구현하는 일 실시예일 뿐이며, 본 발명의 기술적 사상을 구현하는 한 어떠한 변경예 또는 수정예도 본 발명의 범위에 속하는 것으로 해석되어야 한다.In the above, the Applicant has described various embodiments of the present invention, but these embodiments are merely one embodiment for implementing the technical idea of the present invention, and any changes or modifications may be made to the present invention as long as the technical idea of the present invention is implemented. It should be interpreted as falling within the scope of.
Claims (5)
- 외면을 따라 나사산이 형성되고, 테이퍼진 챔퍼부와 상기 챔퍼부에서 연장되는 평행부를 가진 나사산부를 포함하는 나사전조탭에 있어서,A screw threaded tab is formed along an outer surface and includes a threaded portion having a tapered chamfer portion and a parallel portion extending from the chamfer portion,상기 챔퍼부는 챔퍼부의 전방에 연이어 형성되어 소재의 관통홀 표면에 접촉하여 상기 나사전조탭을 상기 관통홀 내로 가이드하는 소정의 폭을 가진 가이드부를 포함하며,The chamfer portion is formed in front of the chamfer portion includes a guide portion having a predetermined width to contact the surface of the through-hole of the material to guide the screw rolling tab into the through-hole,상기 가이드부는 상기 챔퍼부의 나사산보다 먼저 상기 관통홀 표면에 접촉하여, 상기 챔퍼부의 나사산이 상기 관통홀 표면에 접촉시 상기 챔퍼부가 상기 관통홀의 표면에서 이격되어 위치하지 않도록 하는 것을 특징으로 하는 나사전조탭.The guide portion is in contact with the surface of the through-hole prior to the thread of the chamfer portion, so that the threaded tap is not located away from the surface of the through-hole when the thread of the chamfer portion in contact with the surface of the through hole. .
- 제1항에 있어서, 상기 가이드부는The method of claim 1, wherein the guide portion상기 관통홀 표면의 형상에 대응되는 형상을 가지며, 120 내지 360도의 가이드형성각을 가지는 지점까지 형성되는 것을 특징으로 하는 나사전조탭.The thread rolling tab having a shape corresponding to the shape of the surface of the through hole and formed to a point having a guide forming angle of 120 to 360 degrees.
- 외면을 따라 나사산이 형성되고, 테이퍼진 챔퍼부와 상기 챔퍼부에서 연장되는 평행부를 가진 나사산부를 포함하는 나사전조탭에 있어서,A screw threaded tab is formed along an outer surface and includes a tapered chamfer portion and a threaded portion having a parallel portion extending from the chamfer portion.상기 나사산부는 상기 나사산에서 외측방향으로 나사산을 따라 소정 간격을 두고 돌출되는 복수 개의 산정돌출부와, 인접하는 상기 산정돌출부를 연결하는 산정여유부와, 나사골에서 외측방향으로 나사골을 따라 소정의 간격을 두고 돌출되는 복수 개의 골밑돌출부와, 인접하는 상기 골밑돌출부를 연결하는 골밑여유부를 포함하며,The screw portion has a plurality of projection projections projecting at predetermined intervals along the thread in the outer direction from the screw thread, a calculation margin connecting the adjacent projection projections, and at a predetermined interval along the screw bone outward from the screw bone It includes a plurality of protruding sub-protrusion, and sub-apparent margin connecting the proximal sub-protrusion,상기 산정돌출부의 곡률반경은 상기 골밑돌출부의 곡률반경보다 더 작은 값을 가지고, 상기 산정여유부의 곡률반경은 상기 골밑여유부의 곡률반경보다 더 큰 값을 가지는 것을 특징으로 하는 나사전조탭.The radius of curvature of the projection protrusion has a smaller value than the radius of curvature of the proximal protrusion, and the radius of curvature of the calculation margin has a larger value than the radius of curvature of the bone recess.
- 제3항에 있어서,The method of claim 3,상기 산정돌출부의 곡률반경은 0.4 내지 0.7 피치의 값을 가지며, The radius of curvature of the calculation protrusion has a value of 0.4 to 0.7 pitch,상기 골밑돌출부의 곡률반경은 0.8 내지 1.5 피치의 값을 가지고,The radius of curvature of the prominence of the valley has a value of 0.8 to 1.5 pitch,상기 산정여유부의 접선각은 14 내지 18도의 값을 가지며,The tangent angle of the calculation margin has a value of 14 to 18 degrees,상기 골밑여유부의 접선각은 9도 내지 13도의 값을 가지는 것을 특징으로 하는 나사전조탭.The tangential angle of the sub valley free part is a screw rolled tap characterized in that it has a value of 9 degrees to 13 degrees.
- 제1항 또는 제2항에 있어서,The method according to claim 1 or 2,상기 나사산부는 상기 나사산에서 외측으로 나사산을 따라 소정 간격을 두고 돌출되는 복수 개의 산정돌출부와, 인접하는 상기 산정돌출부를 연결하는 산정여유부와, 나사골에서 외측으로 나사골을 따라 소정의 간격을 두고 돌출되는 복수 개의 골밑돌출부와, 인접하는 상기 골밑돌출부를 연결하는 골밑여유부를 추가로 포함하며,The threaded portion protrudes from the screw thread outwardly along the thread with a plurality of protruding protrusions protruding at predetermined intervals, a calculation margin connecting the adjoining protruding protrusions, and protruding from the screw bone at an interval along the screw bone. Further comprising a plurality of subproximal protrusions, and subapparent margin connecting the adjacent subproximal protrusions,상기 산정돌출부의 곡률반경은 상기 골밑돌출부의 곡률반경보다 더 작은 값을 가지고, 상기 산정여유부의 곡률반경은 상기 골밑여유부의 곡률반경보다 더 큰 값을 가지는 것을 특징으로 하는 나사전조탭.The radius of curvature of the projection protrusion has a smaller value than the radius of curvature of the proximal protrusion, and the radius of curvature of the calculation margin has a larger value than the radius of curvature of the bone recess.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2011-0049189 | 2011-05-24 | ||
| KR1020110049189A KR20120131022A (en) | 2011-05-24 | 2011-05-24 | Thread rolling tap |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2012161507A2 true WO2012161507A2 (en) | 2012-11-29 |
| WO2012161507A3 WO2012161507A3 (en) | 2013-01-17 |
Family
ID=47217895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2012/004064 WO2012161507A2 (en) | 2011-05-24 | 2012-05-23 | Thread rolling tap |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR20120131022A (en) |
| WO (1) | WO2012161507A2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20180101969A (en) | 2017-03-06 | 2018-09-14 | 한국오에스지 주식회사 | Thread rolling tap |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0942255A (en) * | 1995-08-02 | 1997-02-10 | Honda Motor Co Ltd | Self-forming screw |
| JPH10166096A (en) * | 1996-12-06 | 1998-06-23 | Minebea Co Ltd | Manufacture of thread rolling flat dies |
| KR200175546Y1 (en) * | 1999-11-03 | 2000-03-15 | 주식회사진산엔지니어링 | Tab with hole guide |
| JP2004276085A (en) * | 2003-03-18 | 2004-10-07 | Yamawa Seiki Kogyo Kk | Torque reductive cold forming tap |
-
2011
- 2011-05-24 KR KR1020110049189A patent/KR20120131022A/en active Search and Examination
-
2012
- 2012-05-23 WO PCT/KR2012/004064 patent/WO2012161507A2/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0942255A (en) * | 1995-08-02 | 1997-02-10 | Honda Motor Co Ltd | Self-forming screw |
| JPH10166096A (en) * | 1996-12-06 | 1998-06-23 | Minebea Co Ltd | Manufacture of thread rolling flat dies |
| KR200175546Y1 (en) * | 1999-11-03 | 2000-03-15 | 주식회사진산엔지니어링 | Tab with hole guide |
| JP2004276085A (en) * | 2003-03-18 | 2004-10-07 | Yamawa Seiki Kogyo Kk | Torque reductive cold forming tap |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20120131022A (en) | 2012-12-04 |
| WO2012161507A3 (en) | 2013-01-17 |
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