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1. 发明授权

US5230234A Method of making roll-finished gears 失效
标题翻译：制作滚动齿轮的方法
公开(公告)号：US5230234A
公开(公告)日：1993-07-27
申请号：US880920
申请日：1992-05-11
申请人： William J. Fuhrman
发明人： William J. Fuhrman
IPC分类号： B21H5/02
CPC分类号： B21H5/022
摘要： A method of preparing a gear blank for roll-finishing, essentially comprising the step of: while supporting a gear blank with pitch-line chucking, finish-sizing the central axial opening of the gear blank to a desired concentricity to promote accurate subsequent roll-finishing. Also, a method of making roll-finished gears, comprising: (a) preparing a near-net-shape gear blank, with external gear teeth and a central axial opening, by intimately engaging and supporting the gear blank between two opposing roll-finishing gear dies, without teeth finishing pressure; (b) finish-sizing the sides of said axial opening to attain a concentricity between the gear blank's intended tooth pitch circle and said sized sides that is within the range of 0.001 inch TIR; and (c) inserting a snugly fitting arbor into said opening and completing roll-finishing of the gear blank by progressively bringing the roll-finishing dies together to exert teeth finishing pressure and rotating said dies to form the desired gear teeth on said gear blank.
摘要翻译：一种制备用于辊压精加工的齿轮坯料的方法，其基本上包括以下步骤：在用齿轮夹紧支撑齿轮坯料的同时，将齿轮坯料的中心轴向开口精加工成所需的同心度，精加工。另外，制造滚压成形齿轮的方法包括：（a）通过在两个相对的辊加工之间紧密地接合和支撑齿轮坯料来制备具有外齿轮齿和中心轴向开口的近网状齿轮坯料齿轮模具，无齿整理压力; （b）对所述轴向开口的侧面进行精加工，以获得齿轮坯料预期齿节圆与所述尺寸在0.001英寸TIR范围内的尺寸相同的同心度; 和（c）将紧密配合的心轴插入所述开口中，并通过逐渐地将辊精加工模具一起施加齿轮精加工压力并旋转所述模具以在所述齿轮坯料上形成所需的齿轮齿，从而完成齿轮坯料的辊压精加工。

2. 发明授权

US5295382A Cold extrusion of externally toothed helical members 失效
标题翻译：外齿螺旋构件的冷挤压
公开(公告)号：US5295382A
公开(公告)日：1994-03-22
申请号：US880919
申请日：1992-05-11
申请人： William J. Fuhrman
发明人： William J. Fuhrman
IPC分类号： B21J5/12 , B21K1/30
CPC分类号： B21J5/12 , B21K1/30 , B21K1/305 , Y10T29/49474
摘要： An internally toothed die which has the entire root to pitch diameter of its die tooth tip material removed in the transition zone between the land area and the trailing relieved portion; this essentially redistributes the extrusion bending forces without sacrificing helical workpiece guidance, dimensional control, or surface integrity during extrusion of an externally helically toothed gear. It provides a relieved portion that has a leading scallop with a spherical radius and a trailing portion that is linear but tangent to the spherical radius.
摘要翻译：一种内齿模具，其具有在陆地区域和尾部卸载部分之间的过渡区域中去除的其模头尖材料的整个根部到节距直径; 这实质上重新分布挤出弯曲力，而不会牺牲螺旋形工件引导，尺寸控制或在外螺旋齿轮的挤出过程中的表面完整性。它提供了一个松弛部分，其具有球形半径的前导扇贝和与球面半径相切的直线形的后部。

3. 发明授权

US4878370A Cold extrusion process for internal helical gear teeth 失效
标题翻译：内螺旋齿轮齿的冷挤压工艺
公开(公告)号：US4878370A
公开(公告)日：1989-11-07
申请号：US232042
申请日：1988-08-15
申请人： William J. Fuhrman , Daniel W. Hall , John C. Schneider
发明人： William J. Fuhrman , Daniel W. Hall , John C. Schneider
IPC分类号： B21C23/10 , B21C23/14 , B21J5/12 , B21K1/30
CPC分类号： B21J5/12 , B21C23/10 , B21C23/14 , B21K1/30 , B21K1/305
摘要： A cold extrusion process for forming internal ring gears comprising the formation of an annular ring gear blank having precise inside and outside diameters, placing the workpiece over a circular mandrel having external gear forming die teeth and a pilot portion adapted to receive the blank, placing a die ring around the mandrel and the assembled workpiece, a circular punch arranged coaxially with respect to the mandrel and the workpiece, moving the punch into the annular space occupied by the workpiece between the die ring and the mandrel, advancing the punch by means of a press whereby the workpiece is cold formed through the external teeth of the mandrel, moving the die ring in synchronism with the downward motion of the workpiece through the die teeth thereby eliminating any frictional forces in the direction of motion of the die during the extrusion process, and retracting the die ring following the extrusion of the workpiece thereby permitting automated ejection of the workpiece.

4. 发明授权

US5408857A Method and apparatus for extrusion of gears 失效
标题翻译：用于挤出齿轮的方法和装置
公开(公告)号：US5408857A
公开(公告)日：1995-04-25
申请号：US130803
申请日：1993-10-04
申请人： William J. Fuhrman , Alexander Bajraszewski
发明人： William J. Fuhrman , Alexander Bajraszewski
IPC分类号： B21K1/30
CPC分类号： B21K1/30 , Y10T29/49474
摘要： A method is disclosed for forming helical or spur gears. The method comprises providing a die having a toothed region, positioning a first blank in the toothed region of the die, inserting second and third blanks adjacent the first blank, and applying a force to the third blank. The toothed region of the die includes die teeth projecting into an internal bore of the die, and the force is applied to the third blank to move the second blank through the die until a leading end of the third blank is generally coincidental with a minimum diameter portion of the toothed region. During the application of force to the third blank, the second blank is moved through the toothed region of the die to form external teeth in the blank, and the first blank is ejected from the toothed region. Preferably, the toothed region of the die includes a tapered rake face section and a full depth section, and the minimum diameter portion of the toothed region occurs at an intersection of the tapered rake face section and the full depth section. An apparatus embodying this method is also disclosed.
摘要翻译：公开了用于形成螺旋或正齿轮的方法。该方法包括提供具有齿形区域的模具，将第一坯料定位在模具的齿形区域中，将第二坯料和第三坯料相邻插入第一坯料，并向第三坯料施加力。模具的齿形区域包括突出到模具的内孔中的模具齿，并且将力施加到第三坯件以将第二坯料移动通过模具，直到第三坯料的前端大致与最小直径重合部分有齿区域。在向第三坯料施加力的同时，将第二坯料移动通过模具的齿形区域，以在坯料中形成外齿，并且第一坯料从齿形区域中排出。优选地，模具的带齿区域包括锥形前刀面部分和全深度部分，并且齿形区域的最小直径部分出现在锥形前刀面部分和全深部分的交点处。还公开了体现该方法的装置。

5. 发明授权

US5275046A Entrance contour design to streamline metal flow in a forging die 失效
标题翻译：入口轮廓设计，以简化锻造模具中的金属流动
公开(公告)号：US5275046A
公开(公告)日：1994-01-04
申请号：US952425
申请日：1992-09-28
申请人： Vijay Nagpal , William J. Fuhrman , David H. Dodds
发明人： Vijay Nagpal , William J. Fuhrman , David H. Dodds
IPC分类号： B21C25/02 , B21J5/12 , B21K1/30 , B21C25/10
CPC分类号： B21C25/02 , B21J5/12 , B21K1/30
摘要： A forging die and a forging die manufacturing method for extruding helical gears wherein the lead end face of each die tooth is made up of harmonious S-shaped curves with each curve having maximized-radii contours. The shape of the S-shaped curves is formed by dividing the cylindrical surface at the lead end face and the full depth perimeter into an equal number of equally spaced points, connecting these points up into pairs so as to establish the shortest distance between the pairs of points and using these pairs as the end points for the S-shaped curves.
摘要翻译：一种用于挤出螺旋齿轮的锻造模和锻造模制造方法，其中每个模齿的前端面由和谐的S形曲线组成，每个曲线具有最大半径轮廓。 S形曲线的形状通过将引导端面和全深度周边处的圆柱形表面分成相等数量的等间隔点而形成，将这些点对成对连接，以便建立对之间的最短距离的点，并使用这些对作为S形曲线的终点。

6. 发明授权

US4622842A Die for extruding toothed helical members 失效
标题翻译：用于挤压齿形螺旋构件的模具
公开(公告)号：US4622842A
公开(公告)日：1986-11-18
申请号：US681345
申请日：1984-12-13
申请人： Benjamin I. Bachrach , William J. Fuhrman , Daniel W. Hall , Gotz S. Hauser
发明人： Benjamin I. Bachrach , William J. Fuhrman , Daniel W. Hall , Gotz S. Hauser
IPC分类号： B21C25/02 , B21K1/30
CPC分类号： B21K1/30 , B21C25/02 , B21K1/305
摘要： A die for use in extruding helical gears includes a die orifice at the upper end of the die teeth where the extrusion blank first enters the die. Each tooth is formed with a land directed parallel to the helix on the drive and trail side of the tooth and an end face perpendicular to the helix that intersects either a transition surface, directed perpendicular to the die axis, or a land. Alternatively, the end face can extend entirely across the tooth width from one land to the other without the use of the transition surface. Relief surfaces slope inwardly from the land and provide spaces within which the extrusion blank may expand without undue frictional contact with the die.
摘要翻译：用于挤出螺旋齿轮的模具包括在模具齿的上端处的挤出坯料首先进入模具的模孔。每个齿形成有平行于齿的驱动和跟踪侧上的螺旋线定向的平面，以及垂直于螺旋线的端面，其与垂直于模具轴线定向的过渡表面或平台相交。或者，端面可以在不使用过渡表面的情况下从一个区域到另一个区域完全跨越齿宽延伸。浮雕表面从地面向内倾斜，并提供空间，挤出坯料可在该空间内膨胀而不会与模具过度摩擦接触。

7. 发明授权

US4287749A Tapered extrusion die and method of forming the same 失效
标题翻译：锥形挤出模具及其成型方法
公开(公告)号：US4287749A
公开(公告)日：1981-09-08
申请号：US094629
申请日：1979-11-15
申请人： Benjamin I. Bachrach , William J. Fuhrman
发明人： Benjamin I. Bachrach , William J. Fuhrman
IPC分类号： B21C25/02 , B21C25/10 , B23P15/24 , B21C25/08
CPC分类号： B23P15/24 , B21C25/02 , B21C25/10 , Y10T408/29 , Y10T83/0429 , Y10T83/343
摘要： A sleeve having a tapered outer surface is shrink or interference fitted over the outer surface of a die blank in which is formed a central bore, a larger diameter bore and a transition bore therebetween. The diametrical interference between the sleeve and the die blank is effective in producing an elastic deformation of the smaller diameter bore causing it to assume a conical shape. The die blank and sleeve are restrained within a casing and the inner surface of the die is formed by electrical discharge machining, electrical chemical machining or by other known methods. The die casing and sleeve are removed from the die, allowing the release of the stored strain energy of deformation which causes the smaller bore of the die to assume a conical shape tapering radially outwardly from its inner extremity. The sharp corner that results at the innermost end of the smaller bore is removed by lapping a straight-sided tool through the central opening of the die.
摘要翻译：具有锥形外表面的套筒收缩或干涉地装配在模坯的外表面上，其中形成有中心孔，较大直径的孔和其间的过渡孔。套筒和模坯之间的直径干涉有效地产生较小直径孔的弹性变形，使其呈现圆锥形。模具坯料和套筒被限制在壳体内，并且模具的内表面通过放电加工，电化学加工或其它已知方法形成。模具外壳和套管从模具中移出，允许释放存储的变形能量，这导致模具的较小的孔呈现从其内端径向向外渐缩的圆锥形状。通过将直边工具通过模具的中心开口研磨，导致较小孔的最内端产生的尖角被去除。

8. 发明授权

US5325698A Stepped extrusion die assembly 失效
标题翻译：步进挤出模具组装
公开(公告)号：US5325698A
公开(公告)日：1994-07-05
申请号：US953343
申请日：1992-09-30
申请人： Vijay Nagpal , William J. Fuhrman , David H. Dodds
发明人： Vijay Nagpal , William J. Fuhrman , David H. Dodds
IPC分类号： B21C23/14 , B21C25/00 , B21J5/12 , B21K1/30
CPC分类号： B21K1/30 , B21C23/14 , B21C25/00 , B21J5/12 , Y10T29/49474
摘要： A extrusion die assembly for cold extruding internally and/or externally toothed gears and the like, particularly internally toothed ring gears, with the mandrel for forming the internal teeth in the workpiece including axially successive sets of die teeth, with each set including a full complement of annularly arranged and equally spaced die teeth, and the die teeth from the leading set to the trailing set increasing progressively in diameter.In one embodiment, the die teeth from one set to the next on the mandrel extrude the gear teeth in equal radial depth, and in a second embodiment, the die teeth of each succeeding mandrel set extrude the gear teeth by displacing an equal volume of material from one set to the next.The die teeth in each set on the mandrel including a relief portion of progressively decreasing radial dimension, the workpiece being arrested on the die assembly such that all extrusion of the workpiece axially along the mandrel is in the direction of the relief portion, thereby maintaining at a minimum frictional contact between the mandrel and the workpiece.
摘要翻译：用于冷挤压内部和/或外齿齿轮等的挤出模具组件，特别是内齿齿圈，其中心轴用于在工件中形成内齿，包括轴向连续的模具齿组，每组包括全补环形布置和等间隔的模具齿，并且从前置组件到后置组件的模具齿直径逐渐增加。在一个实施例中，在一个实施例中，从心轴上的一组到下一个的模具齿以相等的径向深度挤压齿轮齿，并且在第二实施例中，每个随后的心轴组的模具齿通过移位等体积的材料而挤出齿轮齿从一套到另一套。心轴上的每组中的模具齿包括逐渐减小的径向尺寸的浮雕部分，工件被保持在模具组件上，使得沿着心轴的轴向的所有挤压沿着心轴的所有挤压都沿着浮雕部分的方向，从而保持在心轴和工件之间的最小摩擦接触。

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