Process for forming helical screw threads having a flank with zero or
negative inclination
    1.
    发明授权
    Process for forming helical screw threads having a flank with zero or negative inclination 失效
    用于形成具有零或负倾斜的侧面的螺旋螺纹的方法

    公开(公告)号:US4799372A

    公开(公告)日:1989-01-24

    申请号:US923215

    申请日:1986-10-27

    IPC分类号: B23G1/02 B21H3/04 B21H3/00

    CPC分类号: B21H3/04

    摘要: A process for forming a helical screw thread comprising a flank with negative inclination on the wall of a rotationally symmetrical body (19) such as a metal pipe or tube. A first phase involves producing a screw thread having flanks with a positive inclination and then a second phase involves modifying the inclination of one of the flanks (24) by plastic deformation to make it negative (32). For that purpose, use is made of a roller (26) mounted on an inclined axis (X2--X2), which rolls against the flank of the thread.

    摘要翻译: 一种用于形成螺旋螺纹的方法,该螺旋螺纹包括在诸如金属管或管的旋转对称体(19)的壁上具有负倾斜的侧面。 第一阶段涉及产生具有正向倾斜的侧面的螺纹,然后第二阶段涉及通过塑性变形来改变其中一个侧面(24)的倾斜度以使其为负(32)。 为此,使用安装在倾斜轴线(X2-X2)上的辊(26),辊子倾斜于螺纹的侧面。

    Apparatus and process permitting the cold forming of grooves on the wall
of a revolving part
    2.
    发明授权
    Apparatus and process permitting the cold forming of grooves on the wall of a revolving part 失效
    允许在旋转部分的壁上冷成形槽的装置和工艺

    公开(公告)号:US5339669A

    公开(公告)日:1994-08-23

    申请号:US956508

    申请日:1993-01-21

    摘要: The apparatus and process according to the invention relate to the cold forming by rolling of revolving parts (7).The apparatus comprises two identical milling wheels (9A, 9B) arranged symmetrically with respect to the part (7) to be formed and performing the same rotation movement at speed Vm and progressively moving towards the axis of the part to be formed (X1--X1). The part (7) performs a rotation movement at speed Vp such that Vp=Vm.multidot.N1/N2, N1 being the number of grooves on each wheel (9A, 9B), N2 the number of grooves to be formed on the part (7). An initial setting makes it possible to bring about coincidence between the grooves formed by each of the milling wheels on the part (7).The apparatus and process make it possible to obtain high precision parts.

    摘要翻译: PCT No.PCT / FR92 / 00452 Sec。 371日期:1993年1月21日 102(e)日期1993年1月21日PCT提交1992年5月21日PCT公布。 WO92 / 20474 PCT出版物 日期:1992年11月26日。根据本发明的装置和方法涉及通过旋转部件(7)的滚动进行的冷成型。 该装置包括相对于要形成的部分(7)对称布置的两个相同的铣削轮(9A,9B),并以速度Vm执行相同的旋转运动,并逐渐朝向待形成部件的轴线移动(X1-X1 )。 部分(7)以速度Vp进行旋转运动,使得Vp = VmxN1 / N2,N1是每个车轮(9A,9B)上的槽数,N2是在部件(7)上形成的槽的数量。 初始设定使得可以在部件(7)上由每个铣削轮形成的槽之间引起重合。 该设备和方法可以获得高精度零件。

    Process and a device for the production of grooves on a wall of
revolution
    3.
    发明授权
    Process and a device for the production of grooves on a wall of revolution 失效
    工艺和在革命的墙上生产凹槽的装置

    公开(公告)号:US4838066A

    公开(公告)日:1989-06-13

    申请号:US238591

    申请日:1988-08-31

    CPC分类号: B21C37/205 B21D17/04

    摘要: The process according to the invention relates to the production of grooves such as helical threads on the wall of tubes composed of ductile or plastic materials without removal of matter.It involves using a knurling tool (11) of radius (R.sub.1) which is freely rotatable about an axis (X.sub.3). This axis covers, in the direction indicated by the arrow F2, a determined closed curve (12) which, in the figure, is a circumference of radius (R2) and of axis (X.sub.4).The enveloping curve of the path of the shaping edge (15) of the knurling tool has a region of intersection (13) with the wall of revolution (10) of axis (X.sub.2). The diameter of the knurling tool is greater than the diameter of the circumference (12). A helical thread is obtained by moving the wall of revolution (10) in relative manner along its axis (X.sub.2) relative to the knurling tool (11).

    摘要翻译: 根据本发明的方法涉及在不去除物质的情况下生产由延性或塑料材料构成的管壁上的诸如螺旋形螺纹的槽。 它涉及使用半径为(R1)的滚花工具(11),该工具可绕轴线(X3)自由旋转。 该轴线在箭头F2所示的方向上覆盖一个确定的闭合曲线(12),其在图中是半径(R2)和轴线(X4)的圆周。 滚花工具的成形边缘(15)的路径的包络曲线具有与轴(X2)的旋转壁(10)的交点(13)的区域。 滚花工具的直径大于圆周(12)的直径。 通过相对于滚花工具(11)沿着其轴线(X2)相对地移动旋转壁(10)来获得螺旋形螺纹。

    Cold forming by rolling of parts made of press sintered material
    4.
    发明授权
    Cold forming by rolling of parts made of press sintered material 失效
    通过压制烧结材料制成的零件进行冷成型

    公开(公告)号:US06729171B2

    公开(公告)日:2004-05-04

    申请号:US10176618

    申请日:2002-06-24

    IPC分类号: B21D1500

    摘要: Method of cold forming a blank made of press sintered material which includes moving at least one tool towards the blank and subjecting the blank to rolling under a roughly constant load for a number of passes until the at least one tool reaches a chosen position. At least one of, the chosen position, the roughly constant load, and the corresponding number of passes, is determined so as to control a surface densification and at least one dimension of the rolled blank.

    摘要翻译: 冷成型由压制烧结材料制成的坯料的方法,该方法包括将至少一个工具朝向坯料移动,并使坯料在大致恒定的载荷下滚动多次,直至至少一个工具到达选定位置。 确定所选择的位置,大致恒定载荷和相应的通过次数中的至少一个,以便控制轧制坯料的表面致密化和至少一个尺寸。

    Device for shaping of helical fins on the outer wall of a tube
    5.
    发明授权
    Device for shaping of helical fins on the outer wall of a tube 失效
    用于在管的外壁上成形螺旋翅片的装置

    公开(公告)号:US5365763A

    公开(公告)日:1994-11-22

    申请号:US55254

    申请日:1993-05-03

    CPC分类号: B21D15/04 B21C37/207

    摘要: A device for the formation by rolling of helical fins on heat exchange tubes to increase the heat transfer capacity of the tubes. The device comprises four forming rolls (6, 7, 8, 9) which are arranged on two carriages (4, 5) which are moved together in translation fashion by a hydraulic jack which enables the four forming rolls to bear simultaneously on the wall of a tube (2). The four forming rolls operate around the tube and are rotatably driven at equal speed by a single motor (50). The forming rolls are oriented about an axis (X2, X4, X5) which is perpendicular to the fin shaping zone. The tube (2) is driven by the forming rolls along an axis of translation.

    摘要翻译: 用于通过在热交换管上滚动螺旋翅片而形成的装置,以增加管的传热能力。 该装置包括布置在两个滑架(4,5)上的四个成形辊(6,7,8,9),它们通过液压千斤顶以平移的方式一起移动,这使得四个成形辊能够同时承载在 管(2)。 四个成形辊围绕管子操作并且通过单个马达(50)以相等的速度可旋转地驱动。 成形辊绕垂直于翅片成形区的轴线(X2,X4,X5)定向。 管(2)由成形辊沿平移轴驱动。