WO2015125835A1 - 両ねじ体転造用ダイス構造 - Google Patents

両ねじ体転造用ダイス構造 Download PDF

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Publication number
WO2015125835A1
WO2015125835A1 PCT/JP2015/054487 JP2015054487W WO2015125835A1 WO 2015125835 A1 WO2015125835 A1 WO 2015125835A1 JP 2015054487 W JP2015054487 W JP 2015054487W WO 2015125835 A1 WO2015125835 A1 WO 2015125835A1
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WO
WIPO (PCT)
Prior art keywords
screw
region
rolling
die
die member
Prior art date
Application number
PCT/JP2015/054487
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
裕 道脇
Original Assignee
株式会社ＮｅｊｉＬａｗ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社ＮｅｊｉＬａｗ filed Critical 株式会社ＮｅｊｉＬａｗ
Priority to CN201580020087.1A priority Critical patent/CN106232260B/zh
Priority to KR1020167025314A priority patent/KR20160122234A/ko
Publication of WO2015125835A1 publication Critical patent/WO2015125835A1/ja

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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
    • B21H3/06—Making by means of profiled members other than rolls, e.g. reciprocating flat dies or jaws, moved longitudinally or curvilinearly with respect to each other
    • 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
    • B21H3/06—Making by means of profiled members other than rolls, e.g. reciprocating flat dies or jaws, moved longitudinally or curvilinearly with respect to each other
    • B21H3/065—Planetary thread rolling
    • 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

Definitions

  • the present invention relates to a rolling die structure and the like for efficiently and stably producing both screw bodies having a right screw portion and a left screw portion on the same region in the axial direction of the screw portion by rolling. .
  • a screw material that is a metal cylindrical rod-like body also called a blank is formed with a plurality of strips. While pressing with a die member that becomes a plurality of rigid flat plates, rigid cylinders or rigid cylinders on the surface, the screw material and the die member are relatively displaced to form a screw thread or a screw groove while plastically deforming the screw material surface. It is common.
  • the strips formed on the die member are formed in a state where the cross section is formed in a desired shape, for example, a substantially triangular shape, substantially parallel to each other, and having a lead angle.
  • both threaded bodies having a right threaded part and a left threaded part on the same region in the axial direction of the threaded part of the male threaded body are known, and attempts have been made to produce this by rolling. (See JP 2013-43183 A).
  • the shaft shape after rolling is relatively stable.
  • the strip can be formed with high accuracy.
  • the present invention solves the above-mentioned problems, i.e., reduces both rolling failure of the cylindrical screw material when forming both screw bodies, and enables mass production of high-precision both screw bodies.
  • An object is to provide a die structure for rolling a threaded body.
  • the means adopted by the die structure for rolling both screw bodies includes a die member having a rigid surface that is relatively displaced while being pressed against the screw material, and the die member is formed on the surface of the die member.
  • Precursor processing region having a region gradually approaching the axis of the screw material along the direction of relative displacement on the virtual surface obtained by connecting the outermost parts, and a region gradually separating from the axis
  • a threaded portion forming region having a substantially parallelogram shape in a normal direction view of the virtual surface, and a plurality of concave portions recessed from the virtual surface being arranged in a plurality along the direction of relative displacement. It is characterized by providing.
  • At least a part of the precursor processing region in the die member is present on the upstream side when the screw material is relatively displaced with respect to the both screw forming regions.
  • the precursor processing region and the both screw portion forming regions in the die member are independently arranged.
  • the arrangement pitch of the plurality of concave portions arranged linearly along the direction of relative displacement in the both screw forming regions is different from the approaching region and the separation in the precursor processing region. It is characterized by being set to an integral multiple of the pitch between the areas to be processed.
  • FIG. (A) is a front view showing a die member having the same die structure
  • (B) is a side view.
  • (A) is a front view explaining arrangement
  • (B) is a figure which shows the deformation
  • FIG. 3 is an enlarged sectional view showing a sectional shape of the concave portion.
  • or (C) is a side view which shows the process of processing a screw raw material by the precursor process area
  • (A) is a side view showing a part of both screw bodies in an enlarged manner
  • (B) is a cross-sectional view showing the cross-sectional area of the highest apex of the thread in both screw regions
  • FIG. (A) is a side view showing a part of both screw bodies in an enlarged manner
  • (B) is a sectional view showing a cross-sectional area of a crossing portion of screw threads in both screw regions, and (C) the both screw bodies.
  • the die structure for rolling both screw bodies deforms the surface of the screw material B while being pressed against the cylindrical screw material B and relatively displaced in a direction orthogonal to the axial direction of the screw material B, It is for rolling both screw bodies D which have a right-hand thread part and a left-hand thread part on the same area
  • the rolling die structure of the present embodiment includes two or more die members 10 that are pressed against the screw material B, and each die member 10 has a rigid surface 20. While these two or more die members 10 are pressed against the screw material B, the rigid surfaces 20 thereof are displaced relative to each other and at the same time relative to the screw material B.
  • the rigid surface 20 of the die member 10 has a concave surface 30 on a virtual surface 22 obtained by connecting the outermost portions of the rigid surface 20 (portions that are closest to the screw material B).
  • a plurality of threaded portion forming regions U provided in a plurality of independently aligned manners are provided.
  • the concave portions 30 of both screw portion forming regions U have a substantially parallelogram shape when viewed in the normal direction, and are recessed from the virtual surface 22 as shown in FIG.
  • the virtual surface 22 has a planar shape in the case of the plate-shaped die member 10, a cylindrical surface shape in the case of the round die shape, and a partial cylindrical surface (arc surface) shape in the case of the arc-shaped die shape. It is desirable to set to.
  • each recess 30 is formed in a substantially parallelogram shape in the normal direction view of the virtual plane 22, and preferably has a substantially rhombus shape.
  • each screw pitch in the right-hand thread part and left-hand thread part of the both screw bodies D to be rolled can be made equal to each other.
  • Each of these concave portions 30 is formed such that two or more corner portions 31, 31 of the substantially parallelogram-shaped four-corner corresponding portions in the normal direction view are rounded in the normal direction view as shown in FIG. Is done.
  • all the corners 31, 31, 32, 32 of the substantially parallelogram-shaped four-corner corresponding portion are rounded.
  • the two or more corner portions 31, 31 are preferably set in a diagonal position, and in particular, the direction in which the screw material B rolls, that is, the relative displacement, of the two or more corner portions 31, 31 is preferable. If it is set as a diagonal position in the direction of, it is preferable that the facet generated during rolling is likely to flow out of the recess 30 during relative displacement.
  • the concave portion 30 has a virtual substantially quadrangular pyramid-shaped hole shape with the opening surface as one constituent surface, and the central top portion of the substantially quadrangular pyramid shape is A deepest portion 34 of the recess 30 is formed. More preferably, the shape is such that the deepest portion 34 of the recess 30 has a substantially flat bottom 35. By doing so, the bottom 35 is widened, and it is easy to flow out without clogging the generated facet, and the highest peak of the thread M of both screw bodies D does not form an acute angle in the direction perpendicular to the axis of both screw bodies D. Therefore, the stability when the female screw body is screwed to the both screw bodies D can be improved. Moreover, the product precision of the both screw bodies D obtained by mass production can be remarkably improved.
  • these recesses 30 have a substantially parallelogram shape in which the peripheral portion 33 is rounded as in, for example, R processing in the cross-sectional shape along the normal direction of the virtual surface 22. It forms round along the circumference
  • this invention is not limited to this, For example, as shown to FIG 3 (D), you may make it trapezoid shape and can also make it V shape.
  • the substantially parallelogram-shaped concave portion 30 in the normal direction of the virtual surface 22 has at least one diagonal distance W among its diagonal lines, the radius of the screw blank B as R0, and the circumference.
  • the rate is ⁇ , it is set to be 2 ⁇ R0 or less.
  • the diagonal distance W of at least one of the diagonal lines of the substantially parallelogram forming the recess 30 is ⁇ d. R or less. More preferably, setting the diagonal distance of a diagonal line parallel to at least the relative displacement direction of the diagonal of the parallelogram forming the recess 30 in the following [pi] d R.
  • the opening of the recess 30 sets one diagonal distance of the substantially parallelogram in the normal direction of the virtual surface 22, preferably a relatively long diagonal distance W in the relative displacement direction.
  • the other diagonal distance, preferably the diagonal distance F in the direction orthogonal to the relative displacement direction is set to be relatively short.
  • the concave portion 30 has a volume v of the concave portion 30, a circumferential ratio ⁇ , a concave pitch of the concave portions 30 in a direction orthogonal to the direction of relative displacement of the die member 10, and a valley diameter of both screw bodies D. R (see FIG.
  • the set range of the volume v of the recess 30 is defined by ⁇ pd R h / 7 ⁇ v ⁇ ⁇ pd R h / 5. It is preferable to configure so that. If it is set to be smaller than this range, the thread M is too thin, becomes too small and the strength is insufficient, or when the female screw body is screwed into the both screw bodies D which are male screws obtained by the practice of the present invention. The play becomes too big and the backlash becomes too big.
  • the thread M will be too thick or too large, and play will be reduced when the female screw body is screwed into the both screw bodies D, which are male screws obtained by the practice of the present invention. After that, it becomes difficult to screw or cannot be screwed, or it is difficult to roll the thread M with high accuracy.
  • the rigid surface of the die member has a precursor processing region on the virtual surface 22 obtained by connecting the outermost portions (portions closest to the screw material B) of the rigid surface.
  • This precursor processing region is for processing into a precursor cross-sectional shape (hereinafter referred to as a substantially elliptical shape) such as an elliptical or oval cross-sectional shape, for example, and both screws following this In the part forming region U, a precursor shape for facilitating the formation of both screw parts is formed.
  • the rigid surface 20 of the die member 10 that processes the precursor cross-sectional shape into a substantially elliptical shape has a precursor processing region Q on the virtual surface 22 as shown in FIG.
  • the precursor processing region Q gradually approaches the axis E1 of the screw material B while maintaining the surface state of the virtual surface 22 along the direction of relative displacement with the screw material B.
  • the approaching region Q1 that repeats and the separation region Q2 that gradually separates from the axis E1 are repeated. Therefore, as shown in FIG. 4A, the process of compressing the screw material B, which initially has a circular shape in cross section, in the approach region Q1 is repeated in the same phase.
  • the cross section is non-circular having a major axis and a minor axis.
  • the projections and depressions may have a trapezoidal cross section, or may be sawtooth-like projections and depressions.
  • the precursor processing region Q in the die member 10 exists on the upstream side when the screw material B is relatively displaced with respect to both screw portion forming regions U.
  • the precursor processing region Q and both screw portion forming regions U are disposed independently. If it does in this way, before the screw raw material B approachs into both the thread part formation area
  • the deformation pitch between the approach region Q1 and the separation region Q2 in the precursor processing region Q with respect to the arrangement pitch PU of the plurality of recesses 30 arranged on a straight line along the direction of relative displacement in both screw portion formation regions U PQ is set to an integral multiple thereof, here four times.
  • the parallelograms are arranged in an oblique lattice shape
  • the recesses 30 have a lattice pitch PX of the plurality of recesses 30 arranged in a zigzag shape, which is a half of the arrangement pitch PU of the recesses 30 arranged on a straight line. Become one.
  • phase of the deformation pitch PQ and the phase of the arrangement pitch PU are in agreement between the precursor processing region Q and both screw portion forming regions U adjacent thereto. If it does in this way, rolling of the screw raw material B to the both thread part formation area
  • region Q will be performed smoothly.
  • the screw material B in the precursor processing region Q upstream of the two screw portion forming regions U, has a long axis at a location where it can be the highest peak of the future screw thread M.
  • the amount of plastic deformation of the screw material B can be reduced in the two screw part forming regions U.
  • the precursor processing region Q and both screw portion forming regions U are integrally disposed on the die member 10, and the deformation pitch PQ (short axis and long axis pitch) of the precursor processing region Q and both screws
  • the phase of the highest peak of the thread in the part forming region U and the pitch of the intersecting part (a quarter of the array pitch PU) are matched.
  • the rigid surface 20 of the die member 10 is a planar cylinder (column) that is disposed adjacent to both screw portion forming regions U in a state of being displaced in the axial direction of the screw material B.
  • the portion forming region K may be provided.
  • the cylindrical portion forming region K rolls the cylindrical region of the both screw bodies D of FIGS. 5 and 6.
  • the rolling method of both screw bodies D using the rolling die structure of this embodiment is relatively displaced in a direction perpendicular to the axial direction of the screw material B while being pressed against the cylindrical screw material B. Then, the surface of the screw material B is deformed to roll the both screw bodies D having the right screw portion and the left screw portion on the same region in the axial direction.
  • one flat die member 10 is fixed and the distance between the outermost surfaces is fixed thereto.
  • the other flat die member 10 is arranged so as to be a predetermined distance d, and the other flat die member 10 is relatively displaced while maintaining the distance d.
  • the distance between the central axis E1 of the screw material B and the virtual surface 22 is decreased from the upstream side where the screw material B is relatively displaced toward the downstream side. It can also be set. In that case, the virtual surfaces 22 of the pair of opposed flat die members 10 may be set non-parallel so that the distance from each other gradually decreases in the direction in which the screw material B rolls.
  • the two round die members 12, 12 are The rotating shafts are held in parallel so that the distance between the outermost surfaces is a predetermined distance d. Then, each of them can be rotated while maintaining the distance d. At this time, the respective round die members 12, 12 may be reversely rotated or rotated in the same direction.
  • the screw material B can be processed into an oval shape or an oval shape using the precursor processing region Q of the die member 10. .
  • the screw material B before the screw material B enters the both screw part forming regions U, the screw material B is deformed into a substantially elliptical shape in advance.
  • the thread material B is a long axis at a place where it can be the highest peak of the future thread M, and the intersection of the future thread M It is deformed into a substantially elliptical shape so that the place where it can become a short axis.
  • the amount of plastic deformation of the screw material B can be reduced in the both screw portion forming regions U.
  • the precursor processing region Q and the both screw portion forming regions U are integrally disposed on the die member 10, and the deformation pitch PQ (short axis and long axis pitch) of the precursor processing region Q and both screws Ellipse or oval machining and thread machining are performed in a series of rolling operations while matching the phases of the highest peak of the thread in the part forming region U and the pitch of the intersection (a quarter of the arrangement pitch PU). Do it all together. As a result, it is possible to roll both screw regions with extremely high accuracy with extremely high work efficiency.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Transmission Devices (AREA)
PCT/JP2015/054487 2014-02-18 2015-02-18 両ねじ体転造用ダイス構造 WO2015125835A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201580020087.1A CN106232260B (zh) 2014-02-18 2015-02-18 双螺纹体的滚制用滚牙轮结构
KR1020167025314A KR20160122234A (ko) 2014-02-18 2015-02-18 양나사체 전조용 다이스 구조

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014028039A JP6268471B2 (ja) 2014-02-18 2014-02-18 両ねじ体転造用ダイス構造
JP2014-028039 2014-02-18

Publications (1)

Publication Number Publication Date
WO2015125835A1 true WO2015125835A1 (ja) 2015-08-27

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PCT/JP2015/054487 WO2015125835A1 (ja) 2014-02-18 2015-02-18 両ねじ体転造用ダイス構造

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JP (1) JP6268471B2 (zh)
KR (1) KR20160122234A (zh)
CN (1) CN106232260B (zh)
TW (1) TWI644746B (zh)
WO (1) WO2015125835A1 (zh)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5057053A (zh) * 1973-09-21 1975-05-19
JPS60206547A (ja) * 1984-03-30 1985-10-18 Fuji Tekkosho:Kk 転造装置
JPH04175508A (ja) * 1990-07-13 1992-06-23 O S G Kk ねじ及びそれを形成するための転造ダイス
JP2013043183A (ja) * 2011-08-22 2013-03-04 Yutaka Michiwaki 両ねじ体の転造用ダイス構造及び転造方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0541803A4 (en) * 1990-07-13 1995-01-18 Osg Corp Screw and thread rolling die
JPH0735804B2 (ja) * 1990-11-01 1995-04-19 オーエスジー株式会社 非円形ねじ，非円形ねじ用転造ダイスおよび非円形ねじの転造加工方法
CN2122016U (zh) * 1992-02-21 1992-11-18 广州市标准件工业公司研究所 搓制非圆截面螺杆的搓丝板
JP3960845B2 (ja) * 2002-04-08 2007-08-15 若井産業株式会社 深溝付きスクリュウの転造ダイスと深溝付きスクリュウの製造方法
DE102011003252A1 (de) * 2011-01-27 2012-08-02 Hilti Aktiengesellschaft Walzbacke
TWM423010U (en) * 2011-06-13 2012-02-21 wei-hong Zhan Threading plate, threading plate set and thread-forming machine
CN202224466U (zh) * 2011-09-14 2012-05-23 苏州航天紧固件有限公司 双头螺柱挤压模具

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5057053A (zh) * 1973-09-21 1975-05-19
JPS60206547A (ja) * 1984-03-30 1985-10-18 Fuji Tekkosho:Kk 転造装置
JPH04175508A (ja) * 1990-07-13 1992-06-23 O S G Kk ねじ及びそれを形成するための転造ダイス
JP2013043183A (ja) * 2011-08-22 2013-03-04 Yutaka Michiwaki 両ねじ体の転造用ダイス構造及び転造方法

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Publication number Publication date
JP6268471B2 (ja) 2018-01-31
CN106232260B (zh) 2018-11-16
CN106232260A (zh) 2016-12-14
TW201603926A (zh) 2016-02-01
TWI644746B (zh) 2018-12-21
JP2015150605A (ja) 2015-08-24
KR20160122234A (ko) 2016-10-21

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