Metal deforming – With cleaning – descaling – or lubrication of work or product – Lubricating
Patent
1987-07-23
1988-06-07
Crane, Daniel C.
Metal deforming
With cleaning, descaling, or lubrication of work or product
Lubricating
72283, B21C 900, B21C 124
Patent
active
047488352
ABSTRACT:
A variable-geometry plug for use in the plug drawing of tube or other elongated hollow stock. The plug comprises first and second coaxial and relatively-movable parts which co-operate with a deformable annular sealing ring. With the two parts so disposed that the ring is relaxed, the plug can be inserted easily into the undrawn stock. In use, the two parts are caused to move relative to each other, so deforming the ring that it seals an annular clearance between the plug and the undrawn stock. If lubricant is then provided at the upstream face of the seal, the movement of the stock over the seal then tends to draw that lubricant forward across the seal by hydrodynamic action, so tending to fill the clearance with that lubricant at an enhanced pressure. Plugs are described in which this hydrodynamic pressurization is augmented by fluid under pressure supplied direct to the clearance through conduits including passages formed through the body of the plug. Plugs connected to solid bars and flexible leads, and also truly "floating" plugs no such connection, are described.
REFERENCES:
patent: 2355734 (1944-08-01), Katz
patent: 2363476 (1944-11-01), Bannister
patent: 3596491 (1971-08-01), Cress et al.
patent: 4057992 (1977-11-01), Willimzik
patent: 4655065 (1987-04-01), Sansome et al.
Jones Gerald M.
Sansome Dennis H.
Crane Daniel C.
National Research Development Corporation
LandOfFree
Plug drawing of tubes and other hollow items does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Plug drawing of tubes and other hollow items, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Plug drawing of tubes and other hollow items will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-837895