Tube milling head
First Claim
1. A milling head for a rotary milling tool, comprising:
- a body having a tool mounting portion, a first milling portion located on said body opposite said tool mounting portion, and a second milling portion located intermediate said tool mounting portion and said first milling portion, said first milling portion having one or more tube film removal blades adapted to remove an outer diameter portion of a tube, said second milling portion having at least one orifice extending from an outer portion of the milling head into a recess in said body adapted to receive an end of the tube, and a bevel cutting blade attached to a wall of said orifice, and wherein the bevel cutting blade has an active cutting edge extending into the recess in said body adapted for forming a bevel on the tube end.
6 Assignments
0 Petitions
Accused Products
Abstract
Tube ends such as those of boiler tube banks, are prepared utilizing any of various combinations of processes which include a step of micro-diameter tube film removal from a portion of a tube end, including an area below a beveled segment, or segment to be beveled. The micro-diameter film removal step provides the tube with an exposed, clean metal surface which is conducive to a subsequent welding or bonding operation performed on the tube. Preferably, the process is performed with a tube milling tool having interchangeable milling or cutting heads. A specialized milling head is also disclosed and, in one embodiment, is at least used to perform the micro-diameter tube film removal step. Advantageously, the tube film removal milling head also removes a weld overlay on one or both sides of a tube in one embodiment. The tube film removal milling head includes an attached blade having a planar face configuration which enables tube film removal.
34 Citations
30 Claims
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1. A milling head for a rotary milling tool, comprising:
a body having a tool mounting portion, a first milling portion located on said body opposite said tool mounting portion, and a second milling portion located intermediate said tool mounting portion and said first milling portion, said first milling portion having one or more tube film removal blades adapted to remove an outer diameter portion of a tube, said second milling portion having at least one orifice extending from an outer portion of the milling head into a recess in said body adapted to receive an end of the tube, and a bevel cutting blade attached to a wall of said orifice, and wherein the bevel cutting blade has an active cutting edge extending into the recess in said body adapted for forming a bevel on the tube end. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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11. A milling head for a rotary milling tool, comprising:
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a substantially cylindrical body having an annular recess, said body adapted to be connected to a rotary milling tool, a first milling portion located substantially at one end of the body and having one or more cutting blades connected a predetermined radial distance from the rotational axis of the body to the body by a securing element which extends out from a face surface of said blade a first distance which is less than or equal to a second distance measured from a lower edge of the securing element head to a lower cutting edge of the blade; and
a second milling portion spaced from said first milling portion on the body and having at least one bevel cutting blade having an active cutting edge extending into the recess adapted for forming a bevel on a tube. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A milling head for a rotary milling tool, comprising:
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a substantially cylindrical body having an annular recess, said body adapted to be connected to a rotary milling tool;
one or more tube film cutting blades connected to said body by a securing element, each said blade disposed circumferentially around the rotational axis of the milling head, each said blade having a cutting edge defining an annular cutting sweep having an inner radius which is adapted to remove an outer radial thickness from an annular tube in an amount up to about 25% of said annular tube thickness, and an outer radius at least equal to said tube outer diameter; and
a second milling portion spaced from said first milling portion on the body and having at least one bevel cutting blade having an active cutting edge extending into the recess and adapted for forming a bevel on the tube end.
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Specification