摘要:
The present invention is a metallic wire rod comprising iridium or an iridium-containing alloy and, the wire rod has in the cross section thereof biaxial crystal orientation of 50% or more of abundance proportion of textures in which crystallographic orientation has preferred orientation to direction. In the present invention, crystal orientation in the outer periphery from semicircle of the cross section which is the periphery of the wire rod is important, and in this zone, abundance proportion of textures in which crystallographic orientation has preferred orientation to direction is preferably not less than 50%.
摘要:
Die Erfindung betrifft eine Vorrichtung zum Einfädeln von Rohren oder Stangen in ein Ziehaggregat mit umlaufenden Kettenpaaren, die das Werkstück mittels Klemmbacken am äußeren Umfang greifen und kontinuierlich durch einen dem Ziehaggregat zugeordneten, in einem Ziehringhalter angeordneten Ziehring ziehen, sowie mit einer aus der Ziehachse entfernbaren Greifvorrichtung zum Erfassen der am Rohr- oder Stangenanfang ausgebildeten Ziehangel und Führen des Rohranfanges in die Ziehvorrichtung. Dabei ist die Greifvorrichtung (5) als auf die Ziehangel (2) aufschiebbare Klemmhülse (6) ausgebildet, die in ihrem Inneren mehre an den Umfang der Ziehangel anlegbare, in Ziehrichtung selbstklemmende Spannelemente (7) aufnimmt und die in den zwischen zwei benachbarten Klemmbacken (10) jeder Kette (9) gebildeten Zwischenraum, die Klemmbacken (10) hintergreifend, einlegbar ist.
摘要:
Method for the reverse drawing of bars (11) so as to obtain a first segment of drawn bar (11) long enough for anchorage to a draw carriage (31), the method including the following steps: - a pointed segment (12) is created on the bar (11), - this pointed segment (12) is threaded through a die plate (13) and clamped by a first gripper (14) secured to a base (24) of a drawbench, - the die plate (13) is moved backwards, thus drawing a required length with the bar (11) stationary, - the bar (11) is then released from the first gripper (14) and is moved forwards together with the die plate (13) until the die plate (13) reaches a starting position coinciding with the normal drawing position, and at least part of the segment thus reverse drawn cooperates firmly with the first draw carriage (31). Device for the reverse drawing of bars (11) which is suitable to obtain the above method and comprises in cooperation: - a die plate (13) able to move axially from a normal drawing position to an end position of reverse drawing at a required distance, - a first gripper (14) solidly fixed to a base (24) and positioned immediately downstream of a die plate (13), - a possible second gripper (15) for advancing the bar (11) during the step of repositioning the die plate (13).
摘要:
A multi-walled tube (100) comprising an inner tube (112), an intermediate tube (114) and an outer tube (116) that is useful as an analytical column in which chemical mixtures can be separated into their individual components is described. In order to be acceptable as an analytical column, the inner surface (112A) of the multi-walled tube must support effective separation, but not react chemically with or contaminate the solvent or the analyte (sample to be separated). Grade 316 stainless steel is typically preferred for this purpose. Moreover, the inner diameter (ID) surface of the multi-walled column is preferably very smooth (less than 10 micro inch Ra) with no interruptions in the surface such as scratches, pits, or asperities. However, since the column is designed to be attached to chromatographic equipment using standard size connection features, the size of standard fittings define the outer diameter (OD) of the column.
摘要:
According to the invention, a drawing carriage (16) is made to execute a forward stroke and a return stroke alternately, along longitudinal guides on a drawing bench (11), between two opposite drawing heads (12), each disposed in one end area of the said bench (11) and each including at least one draw plate, by means of driving horizontally with a reciprocating motion. At least one piece to be drawn is pulled in each forward stroke and in each return stroke by the said drawing carriage (16), being made to pass through a corresponding draw plate in the drawing head (12) from which the said carriage (16) is made to move away, in this way, the carriage (16) executes working strokes in both directions of horizontal movement along the corresponding guides, causing at least one piece to be drawn in each working stroke.