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1. 发明授权

US06845560B2 Method for manufacturing a hollow rack shaft 有权
标题翻译：空心齿条轴的制造方法
公开(公告)号：US06845560B2
公开(公告)日：2005-01-25
申请号：US09803560
申请日：2001-03-09
申请人： Akira Tsubouchi , Kiyoshi Okubo , Yasushi Watanabe
发明人： Akira Tsubouchi , Kiyoshi Okubo , Yasushi Watanabe
IPC分类号： B21C37/15 , B21K1/76 , B62D3/12 , B21D53/28 , B21C1/00
CPC分类号： B21K1/767 , B21C37/155 , B21K1/063 , B62D3/126 , Y10S72/702 , Y10T29/49467 , Y10T29/49474 , Y10T29/49476 , Y10T74/1967 , Y10T74/19949
摘要： Methods are provided for forming a hollow rack shaft from a workpiece comprising a rectangular plate. The workpiece is first bent into a gutter-like shape using a first die set. Rack teeth are then press-formed in a portion of the gutter-like shape using a second die set. The legs, or sides, of the workpiece are then bent around a mandrel into a semi-circular shape so as to butt against each other. Preferably, the die sets and mandrel may be adapted to improve the resulting hollow rack shaft.
摘要翻译：提供了用于从包括矩形板的工件形成中空齿条轴的方法。首先使用第一模具将工件弯曲成沟槽状。然后使用第二模具组，在沟槽状形状的一部分中压制成齿。然后将工件的腿部或侧面围绕心轴弯曲成半圆形以便彼此对接。优选地，模具组和心轴可以适于改进所得到的中空齿条轴。

2. 发明授权

US06782772B2 Hollow rack shaft and manufacturing method thereof 有权
标题翻译：空心轴及其制造方法
公开(公告)号：US06782772B2
公开(公告)日：2004-08-31
申请号：US10459749
申请日：2003-06-12
申请人： Akira Tsubouchi , Kiyoshi Okubo , Yasushi Watanabe
发明人： Akira Tsubouchi , Kiyoshi Okubo , Yasushi Watanabe
IPC分类号： F16H104
CPC分类号： F16H55/26 , B21K1/767 , B21K1/768 , B62D3/126 , Y10T74/1967
摘要： The object of the invention is to provide a rack shaft having two rack teeth groups and hollowed throughout the whole body, to lightweightize the shaft and to reduce the cost. The two rack teeth groups are located longitudinally apart from each other and have phase difference related to an angle around the axis of the shaft. After the two rack teeth groups are formed simultaneously or sequentially by die forming on the flat bottoms of the workpiece beforehand gutter-shaped, the legs of the gutter-shaped workpiece are bent to butt to each other and, thereby, a tubular body of the shaft is given to the workpiece. The centers of the material are offset beforehand corresponding to the phase difference.
摘要翻译：本发明的目的是提供一种齿条轴，其具有两个齿条齿组，并且在整个机体中中空化，以使轴轻量化并降低成本。两个齿条齿组彼此纵向分开，并且具有与轴的轴线周围的角度相关的相位差。在通过模具成形同时或顺序地形成两个齿条齿组之后，预先形成沟槽状的工件的平坦底部，将沟槽状工件的腿弯曲成彼此对接，从而将管状体轴被给予工件。材料的中心预先相应于相位差偏移。

3. 发明授权

US06442992B1 Hollow rack shaft and method of manufacturing the same 有权
公开(公告)号：US06442992B1
公开(公告)日：2002-09-03
申请号：US09775124
申请日：2001-02-01
申请人： Akira Tsubouchi , Kiyoshi Okubo , Yasushi Watanabe
发明人： Akira Tsubouchi , Kiyoshi Okubo , Yasushi Watanabe
IPC分类号： B21K154
摘要： In a method of manufacturing a hollow rack shaft, an approximately rectangular plate having a wide rack tooth portion, is bent lengthwise into a gutter-like cross section to provide: at the central portion, a flat bottom portion on which rack teeth are formed later and a pair of mutually facing leg portions, and, in the vicinity of both ends, a semicircular bottom portion and a pair of mutually facing leg portions. The mutually facing leg portions at the central portion have a larger clearance than the clearance of the mutually facing leg portions in the vicinity of both ends. The rack teeth are then formed on the flat bottom portion through the plastic flow of the flat bottom portion and a part of material of the pair of leg portions of this flat bottom portion. The gutter-shaped plate, on which the rack teeth have been formed, is then formed into a tube having a hollow inner surface, by bending the plate and butt joining the edge portions.

4. 发明授权

US06779271B2 Method for manufacturing a hollow rack shaft 有权
标题翻译：空心齿条轴的制造方法
公开(公告)号：US06779271B2
公开(公告)日：2004-08-24
申请号：US10315281
申请日：2002-12-09
申请人： Akira Tsubouchi , Kiyoshi Okubo , Yasushi Watanabe
发明人： Akira Tsubouchi , Kiyoshi Okubo , Yasushi Watanabe
IPC分类号： B21D5328
CPC分类号： B21K1/767 , B21C37/155 , B21K1/063 , B62D3/126 , Y10S72/702 , Y10T29/49467 , Y10T29/49474 , Y10T29/49476 , Y10T74/1967 , Y10T74/19949
摘要： A hollow rack shaft is manufactured through a first step, a second step and a third step. At the first step, the plate-like workpiece of substantial rectangular shape is press formed into a gutter-like shape. The first die set used at this step is provided with slant die surfaces for canceling elastic recovering generated at the workpiece when the workpiece is removed from the first die set. At the second step, a row of rack teeth is press-formed on the flat bottom portion of the workpiece formed in the first step. The die set used at the second step is provided with a recess for releasing surplus workpiece material within the die clearance at a stroke end of the pressworking. At the third step, each of a pair of legs of the workpiece is bent in a semi-circular shape so as to be butted to each other. At this time, a mandrel is inserted between the legs of the workpiece.
摘要翻译：通过第一步骤，第二步骤和第三步骤制造空心齿条轴。在第一步骤中，大致矩形的板状工件被压制成沟槽状。在该步骤中使用的第一模具设置有倾斜的模具表面，用于抵消当从第一模具组移除工件时在工件处产生的弹性恢复。在第二步骤中，在第一步骤中形成的工件的平坦底部上压制一排齿条齿。在第二步骤中使用的模具设置有用于在冲压加工的冲程端处释放模具间隙内的多余工件材料的凹部。在第三步骤中，工件的一对腿中的每一个被弯曲成半圆形以便彼此对接。此时，心轴插入工件的腿部之间。

5. 发明授权

US06782598B2 Method of manufacturing hollow rack shaft 有权
标题翻译：空心轴轴
公开(公告)号：US06782598B2
公开(公告)日：2004-08-31
申请号：US10461056
申请日：2003-06-13
申请人： Akira Tsubouchi , Kiyoshi Okubo , Yasushi Watanabe
发明人： Akira Tsubouchi , Kiyoshi Okubo , Yasushi Watanabe
IPC分类号： B21D3500
CPC分类号： B21D43/285 , B21C37/155 , B21D35/006 , B21D53/88 , B21K1/12 , B21K1/767 , B21K1/768 , B62D3/126 , Y10T29/49462 , Y10T29/49467 , Y10T29/49474 , Y10T29/49906 , Y10T74/1967
摘要： A workpiece for a hollow rack shaft is a substantially rectangular plate. The opposite two sides of this workpiece are respectively provided with a complementary profile composed of the continuation of a convex portion and a concave portion and when the workpiece is cylindrically formed, the profiles are mutually engaged. As the width of a part the width of which is the largest in the convex portion is larger than that of a part the width of which is the smallest in the concave portion, the two sides are prevented from being detached after engagement. Further, the opposite convex portion and concave portion are mutually caulked and hereby, mutual gap is removed.
摘要翻译：中空齿条轴的工件是大致矩形的板。该工件的相对的两侧分别设置有由凸部和凹部的延续构成的互补轮廓，并且当工件被圆柱形地形成时，轮廓相互接合。由于凸部的宽度最大的部分的宽度大于凹部的宽度最小的部分的宽度，所以在接合后防止两侧脱离。此外，相对的凸部和凹部相互铆接，因此相互间隙被去除。

6. 发明授权

US06763739B2 Hollow rack shaft and manufacturing method thereof 有权
公开(公告)号：US06763739B2
公开(公告)日：2004-07-20
申请号：US09994526
申请日：2001-11-27
申请人： Akira Tsubouchi , Kiyoshi Okubo , Yasushi Watanabe
发明人： Akira Tsubouchi , Kiyoshi Okubo , Yasushi Watanabe
IPC分类号： F16H104
CPC分类号： F16H55/26 , B21K1/767 , B21K1/768 , B62D3/126 , Y10T74/1967
摘要： The object of the invention is to provide a rack shaft having two rack teeth groups and hollowed throughout the whole body, to lightweightize the shaft and to reduce the cost. The two rack teeth groups are located longitudinally apart from each other and have phase difference related to an angle around the axis of the shaft. After the two rack teeth groups are formed simultaneously or sequentially by die forming on the flat bottoms of the workpiece beforehand gutter-shaped, the legs of the gutter-shaped workpiece are bent to butt to each other and, thereby, a tubular body of the shaft is given to the workpiece. The centers of the material are offset beforehand corresponding to the phase difference.

7. 发明授权

US07069764B2 Method for manufacturing a hollow rack shaft 有权
公开(公告)号：US07069764B2
公开(公告)日：2006-07-04
申请号：US10798175
申请日：2004-03-11
申请人： Akira Tsubouchi , Kiyoshi Okubo , Yasushi Watanabe
发明人： Akira Tsubouchi , Kiyoshi Okubo , Yasushi Watanabe
IPC分类号： B21J13/02
CPC分类号： B21K1/767 , B21C37/155 , B21K1/063 , B62D3/126 , Y10S72/702 , Y10T29/49467 , Y10T29/49474 , Y10T29/49476 , Y10T74/1967 , Y10T74/19949
摘要： A hollow rack shaft is manufactured through a first step, a second step and a third step. At the first step, the plate-like workpiece of substantial rectangular shape is press formed into a gutter-like shape. The first die set used at this step is provided with slant die surfaces for canceling elastic recovering generated at the workpiece when the workpiece is removed from the first die set. At the second step, a row of rack teeth is press-formed on the flat bottom portion of the workpiece formed in the first step. The die set used at the second step is provided with a recess for releasing surplus workpiece material within the die clearance at a stroke end of the pressworking. At the third step, each of a pair of legs of the workpiece is bent in a semi-circular shape so as to be butted to each other. At this time, a mandrel is inserted between the legs of the workpiece.

8. 发明授权

US06898853B2 Method for manufacturing a hollow rack shaft 有权
标题翻译：空心齿条轴的制造方法
公开(公告)号：US06898853B2
公开(公告)日：2005-05-31
申请号：US10315297
申请日：2002-12-09
申请人： Akira Tsubouchi , Kiyoshi Okubo , Yasushi Watanabe
发明人： Akira Tsubouchi , Kiyoshi Okubo , Yasushi Watanabe
IPC分类号： B21C37/15 , B21K1/76 , B62D3/12 , B21D53/28 , B21C25/02 , B21K1/30
CPC分类号： B21K1/767 , B21C37/155 , B21K1/063 , B62D3/126 , Y10S72/702 , Y10T29/49467 , Y10T29/49474 , Y10T29/49476 , Y10T74/1967 , Y10T74/19949
摘要： A hollow rack shaft is manufactured through a first step, a second step and a third step. At the first step, the plate-like workpiece of substantial rectangular shape is press-formed into a gutter-like shape. At the second step, a row of rack teeth is press-formed by a preliminary forming step and a main forming step on the flat bottom portion of the workpiece formed in the first step. The die set used at the second step is provided with a recess for releasing surplus workpiece material within the die clearance at a stroke end of the pressworking and each die set is divided into a plurality of segments at the recess. At the third step, each of a pair of legs of the workpiece is bent in a semi-circular shape so as to be butted to each other.
摘要翻译：通过第一步骤，第二步骤和第三步骤制造空心齿条轴。在第一步骤中，大致矩形的板状工件被压制成沟槽状。在第二步骤中，通过在第一步骤中形成的工件的平坦底部上的预成型步骤和主成形步骤来压入一排齿条齿。在第二步骤中使用的模具设置有用于在冲压加工的冲程端处释放模具间隙内的剩余工件材料的凹部，并且每个模具组在凹部处被分成多个段。在第三步骤中，工件的一对腿中的每一个被弯曲成半圆形以便彼此对接。

9. 发明授权

US06588293B2 Hollow rack shaft 有权
标题翻译：空心轴轴
公开(公告)号：US06588293B2
公开(公告)日：2003-07-08
申请号：US09832449
申请日：2001-04-10
申请人： Akira Tsubouchi , Kiyoshi Okubo , Yasushi Watanabe
发明人： Akira Tsubouchi , Kiyoshi Okubo , Yasushi Watanabe
IPC分类号： F16H1904
CPC分类号： F16H55/26 , B21K1/767 , B21K1/768 , B62D3/126 , Y10T74/1967 , Y10T74/19949
摘要： A hollow rack shaft is produced by forming a plate work piece and has continuous metal flow along the contour of rack teeth surface without being cut. A series of wave-like concave-convex sections is formed on the inner surface of the shaft. Thickness of tooth body and tooth bottom of the rack teeth is adjusted by dimensions of the unevenness. Thereby, stress concentration at each point of the rack shaft is prevented and the shaft is strengthened and its weight reduced.
摘要翻译：通过形成板状工件制造中空的齿条轴，并且沿着齿条齿表面的轮廓连续地进行金属流动而不被切割。在轴的内表面上形成有一系列波状的凹凸部。牙齿的齿体和齿底的厚度根据不平整度的尺寸进行调节。由此，防止了齿条轴的各点处的应力集中，并且轴被加强并且其重量减轻。

10. 发明授权

US6049964A Method of making a yoke for universal joint 失效
标题翻译：制造用于万向节的轭的方法
公开(公告)号：US6049964A
公开(公告)日：2000-04-18
申请号：US865765
申请日：1997-05-30
申请人： Yasushi Watanabe , Kiyoshi Okubo
发明人： Yasushi Watanabe , Kiyoshi Okubo
IPC分类号： F16D3/26 , B21D53/84 , B21D53/88 , B23P15/00 , F16D1/08 , F16D3/38 , B23P13/04
CPC分类号： B21D53/88 , B23P15/00 , F16D1/0864 , F16D3/387 , B23P2700/11 , Y10T29/49996
摘要： A production process of a yoke a for universal joint using a flat metal sheet to make a yoke for universal joint comprising a base for engaging with an end of a rotary shaft and fixing the end, a pair of arms having respective surfaces opposite to each other and extending in the axial direction of the base from opposite positions in the diameter direction and on one axial edge of the base, and press-worked circular holes coaxial with each other, formed in associated tip portions of said respective arms, wherein in portions of said flat metal sheet to become said respective circular holes, prepared holes having an inner diameter sufficiently smaller than an inner diameter of the circular holes are punched by press working, thereafter the flat metal sheet is curved to form said base and the pair of arms, then rough machining is carried out to punch the portions of the prepared holes in a nearly circular shape by press working, and thereafter press working is carried out to shave an inner peripheral edge of each hole by a small shaving amount, thereby forming the press-worked circular holes.
摘要翻译：用于万向接头的磁轭a的制造方法，使用平板金属板制造用于万向接头的轭，包括用于与旋转轴的端部接合并固定该端部的基座，具有彼此相对的相对表面的一对臂并且在所述基部的直径方向上的相对位置和所述基部的一个轴向边缘上沿着轴向方向延伸，并且形成在所述各个臂的相关末端部分中的彼此同轴的压力加工的圆形孔，其中，所述扁平金属片成为所述各个圆形孔，通过冲压加工冲压具有足够小于圆孔内径的内径的预制孔，然后将平金属片弯曲以形成所述基座和所述一对臂，然后进行粗加工，通过冲压加工将预制孔的部分冲压成近圆形，然后进行冲压加工以刮削内部每个孔的周边边缘通过小的剃须量，从而形成加压圆孔。

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