Gauge face inlay for bit hardfacing

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

761082, E21B 1016, B21K 504

Patent

active

059883030

ABSTRACT:
Steel bit bodies are manufactured in a production process that employs polystyrene patterns in a lost foam casting process. The patterns are machined to permit the formation of complex shapes that cannot be reproduced in simple patterns that are extractable from reusable, two-piece pattern molds or dies. The patterns are machined from a billet material according to a basic, programmed, five-axis machining process to form multiple copies of a reproducible complex pattern body. The process is modified to produce multiple copies of a modified design. Machining the complex patterns and producing variations by changing the machine program permit multiple bit patterns of variable forms to be produced without need for building an intermediate, reusable pattern mold that would require multiple mold pieces, thus eliminating the associated time and expense required in the creation of a new pattern mold for each variation of the bit design. The pattern is machined in a single chucking operation in a machine tool adapted for machining plastics in a three-dimensional global process. The plastic has a composition and a density that permit it to be machined into a pattern having relatively small, unsupported structural projections and smooth surface features. Bit patterns formed in the process have forward canted blades that are machined from mating planar surfaces to simplify the machining process. The edges of the forward canted blades form a spiral surface for mounting cutter elements. The forward canting makes the blades stronger and thus permits the blades to be thinner than non-canted blades to increase the clearance between blades, which improves the movement of cuttings past the bit. Recesses are machined into the gauge face of the patterns to produce a recess in the casting for receiving hardfacing. The hardfacing in the recess forms a layer that cooperates with the surrounding blade material to form a smooth transition area as the bit wears during usage.

REFERENCES:
patent: 4368788 (1983-01-01), Drake
patent: 4398952 (1983-08-01), Drake
patent: 4423646 (1984-01-01), Bernhardt
patent: 4499795 (1985-02-01), Radtke
patent: 4499958 (1985-02-01), Radtke et al.
patent: 4660623 (1987-04-01), Ashton
patent: 4884477 (1989-12-01), Smith et al.
patent: 4888082 (1989-12-01), Fetcenko et al.
patent: 5197527 (1993-03-01), Namba et al.
patent: 5247984 (1993-09-01), Stanciu
patent: 5333699 (1994-08-01), Thigpen et al.
patent: 5373907 (1994-12-01), Weaver
patent: 5433280 (1995-07-01), Smith
patent: 5516053 (1996-05-01), Hannu
patent: 5544550 (1996-08-01), Smith

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Gauge face inlay for bit hardfacing does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Gauge face inlay for bit hardfacing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gauge face inlay for bit hardfacing will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1210552

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.