Drill bit with exchangeable cutting portion

FIELD: instrument making.

SUBSTANCE: invention relates to tools for drilling or boring and can be used in machining materials by boring or drilling crowns with replaceable cutting sections. Drill bit is rotatable about an axis and has a cutting portion with one or more cutting segments and a first plug-in connecting element, and a drill shank portion with a second plug-in connecting element, which forms a plug-in connection with first plug-in connecting element. First plug-in connecting element and second plug-in connecting element can be connected by means of a pin connection.

EFFECT: reliable connection of drill rod section and cutting section, reduced costs for replacement of cutting elements.

15 cl, 4 dwg



Same patents:

Pdc-drill rool // 2545201

FIELD: process engineering.

SUBSTANCE: invention relates to rock cutting tools used for well drilling, particularly, to PDC tools, for example, drill bits. This tool comprises the body with PDC cutters. Note here that working surface furnished with cutters is shaped to inverted conical surface with cone base radius-to-height ratio of 2/3. Cutters at inner inverted conical surface can optionally be fully backed up. Cutters to calibrate well walls are arranged in steps in direction of tool spinning.

EFFECT: higher efficiency of tool operation.

6 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to powder metallurgy, particularly, to production of polycrystalline diamond cutting tool. It can be used for production of drill bits. First diamond particles are used for form the insert at pressure and temperature sufficient for forming of diamond-type bonds in the presence of catalyst. Thereafter, catalyst is completely therefrom. Insert without catalyst is secured to substrate at pressure and temperature sufficient for maintenance of diamond-type bonds by binder that differs from catalyst material.

EFFECT: high heat resistance.

20 cl, 3 dwg

FIELD: process engineering.

SUBSTANCE: set of invention relates to drill tools and their hard-facing. Drill tool comprises at least one cutting element on the body, hard-facing material on at least a part of body surface including metal matrix material and particles of polycrystalline diamond material embedded in metal matrix material and including multiple bonded diamond small crystals. Particles of polycrystalline diamond material comprise fragments of one or several layers of polycrystalline diamond materials.

EFFECT: higher resistance to wear and erosion.

15 cl, 8 dwg

FIELD: process engineering.

SUBSTANCE: set of inventions relates to downhole tools and to methods of their production. Proposed cutter comprises substrate with connection surface on substrate one end shaped for coupling inside cutter groove and multiple cutter indices on at least the section of said connection surface wherein cutter every index is arranged around central axis of the substrate and extends not that completely around said central axis and therein multiple cutter indices are, in fact, uniformly spaced apart around said central axis. Said connection surface can be precisely arranged inside cutter groove ay one position whereat said surface is not flat.

EFFECT: precise fit of cutters in downhole tool grooves.

27 cl, 7 dwg

FIELD: metallurgy.

SUBSTANCE: disposal graphite press mould is manufactured with through holes, which forms and sizes correspond to lower projection of bit matrix sectors section. During diamonds laying, loading, formation and matrix charge pressing, under graphite press mould placed is a base which upper surface reproduces profile of surface of matrix sectors lower part. At sintering in vacuum furnace the base is removed. Under each bit matrix sector placed are pellets of treated metal or alloy, so that treatment was performed from bottom to top.

EFFECT: providing self-adjusting and homogeneous dosing of treated metal or alloy in all the matrix sectors, matrix uniform density, improving yield ratio, excluding metal lapping on tool housing.

2 cl, 2 dwg

FIELD: mining.

SUBSTANCE: cutting component includes superabrasive material volume containing the following: a cutting surface passing in two dimensions and across longitudinal axis of the cutting component; with that, some part of the cutting surface cannot be perpendicular to the longitudinal axis of the cutting component; rear boundary located behind the cutting surface; and at least one slot in the cutting surface, which starts near its side boundary and passes through at least some part of the cutting surface. A slot can have variable depth, pass through or along the diameter(s) of the cutting surface. Ribs can adjoin the slot.

EFFECT: improving stability and service life of a drilling bit.

10 cl, 22 dwg

FIELD: process engineering.

SUBSTANCE: set of inventions relates to drill stem and method of its production. Technical result is ensured by geometrical compensation used to perfect precision of elements location on drill stems formed by compaction and sintering. Drill stem body, not completely sintered, features cutting surface profile with shape differing from preset shape of cutting surface profile of completely sintered body formed from drill stem not completely sintered. In making the drill stem body, location error is forecast which will have at least one element of the set at drill stem body not completely sintered. At sintering the drill stem body not completely sintered to preset final density, at least one element is formed at the location at least partially defined by forecast location error which will exist in an least one element of the set, to sinter drill stem body not sintered completely to required final density.

EFFECT: higher efficiency.

20 cl, 14 dwg

Diamond bore tool // 2513795

FIELD: mining.

SUBSTANCE: diamond bore tool comprises a body with a matrix, separated by washing slots into sectors, reinforced by several rows of working layers that contain stencils and diamonds placed in their holes. Thermomelting inserts are fixed between working layers, and working layers are equipped by nets, in cells of which there are diamonds installed, besides, nets are connected with a tension spring fixed in the body slot.

EFFECT: increased efficiency of operation of a bore tool, cleaning of a bottomhole from damaged particles of lower layer diamonds.

2 cl, 4 dwg

FIELD: process engineering.

SUBSTANCE: set of invention relates to rill tools with active and passive elements and to their production. Drill tool comprises body with end surface at its distal end and gaging regions. The latter comprises several blades extending longitudinally upward. Besides it includes shank and transition surface. The latter includes a skew made between OD at top end of appropriate gaging area and shank Besides, it comprises upward boring element composed by the part with transition surface extending from the point abutting on transition edge between and appropriate gaging area and having passive location at downward boring and active position at upward boring or well shaft expansion from bottom to top. Proposed method comprises producing drill tool body including active and passive regions at downward boring. Note here that region comprises body parts distal relative to transition edge. Note here that passive region comprises body parts proximal relative to transition edge. Said passive region is active at upward boring. Upward boring element is arranged in passive region at fastening plate or upward boring element is produced integral with said fastening plate to be attached to passive region.

EFFECT: decreased wear of gaging and passive region.

16 cl, 9 dwg

FIELD: mining.

SUBSTANCE: invention refers to rock-destructing tools, and namely to drilling crowns and bits with diamond equipment for well drilling with selection of core and a continuous face. A diamond drilling tool includes a housing with a connection thread and a matrix reinforced with diamonds arranged in several rows in holes of templates made from softer material in comparison to matrix material. The housing is equipped with several tightly closed chambers provided with return valves spring-loaded in an axial direction with a compression spring and located on the side of the matrix working face; besides, the compression spring is arranged in the chamber cavity and rigidly attached to the housing.

EFFECT: improving operating efficiency due to cleaning of the working face from destructed particles of diamonds of the lower layer.

3 cl, 1 dwg

FIELD: mining.

SUBSTANCE: rock bore bit includes a rod with a shank and a drilling head. An attach surface for connection to the drilling head with form closure is formed in the rod end face opposite to the shank. A cylindrical rod billet is manufactured at one stage. At the next stage, an attach surface is made in the rod; at the next stage, the drilling head is engaged with the rod with form closure through the attach surface that is made in the rod by electrochemical machining (ECM).

EFFECT: improving stability at machining.

14 cl, 12 dwg

FIELD: process engineering.

SUBSTANCE: set of inventions relates to machine building and can be used at percussion drilling of holes in concrete and in drill production. Drill comprises rod with spiral (6) and drilling head (9) composed of hard alloy part fitted in jointing groove (4) of rod (5). Base (4a) of jointing groove (4) extends along curve (4b) of the groove base. Transition surface (11) is arranged for axial transition to spiral (6) by surface curves (12) composed at parallel shift relative to at least one segment of curve (4b) of the groove base with straight line of direction. Transition surface (11) extends axially starting from top edge area of connection groove (4), at least at sections through more than half the depth of connection groove (4). Transition surface contour (11) is, in fact, trapezoidal. Invention covers the method and device for drill production.

EFFECT: simplified fabrication, higher quality and durability of the drill.

10 cl, 8 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to drill tools and can be used at rotary and/or percussion machines designed to bore brickwork, concrete, stone and similar materials. Tool has head and at least one cutting element arranged at the head free end to extend its points in feed direction above the head and radially behind said head. Cutting element incorporates at least two bits with cutting edges. Bits extend radially outward from the point and feature depth increasing at increase in radial distance from the tool lengthwise axis. Side surfaces of the bits are located in parallel planes. Bit cutting edges in direction of the tool lengthwise axis have arc-shape sections to brake drilling dust transfer.

EFFECT: higher loading capacity, longer life.

13 cl, 8 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to drill tools and can be used at rotary and/or percussion machines designed to bore brickwork, concrete, stone and similar materials. This tool has head and at least one cutting element arranged at its free end. Said cutting tool extends beyond said head, its point extending along radial direction beyond drilling tool and having at least two bits with cutting edges. Said bits extend radially outward from the point while cutting edges if seen in direction of drill tool lengthwise axis between the point and peripheral surfaces connecting the lateral surfaces, at least one arc-like section to brake drilling dust radially outward motion. Said section starts at the point whereat bit point vertex angle abruptly decreases.

EFFECT: higher loading capacity, longer life.

14 cl, 8 dwg

Drill // 2510312

FIELD: process engineering.

SUBSTANCE: invention relates to machine building and can be used for drilling holes in stones, concrete etc, for anchor bolts. This drill comprises cutting part with at least three noses spaced apart at drill far end in circle. Every section of said nose has front and rear faces making a connection ridge that serves as a cutting nose and drill body with its far end surface welded to drill cutting part near end to make drill body revolve jointly with drill cutting part. Drill body has dust suck-off channel extending there along so that its far end extends to drill body far end section. Extra dust suck-off channel is made at drill body far end section to extend from dust suck-off channel perpendicularly while extra dust suck-off channel radially outer end is exposed at drill body outer peripheral surface. Drill bit cutting part near end is wholly welded to drill bit far end surface.

EFFECT: better joint between cutting part and drill body.

4 cl, 12 dwg

FIELD: process engineering.

SUBSTANCE: set of inventions relates to devices to secure cutting edge to the tool and to method of drill bit cutting edge replacement. Device to secure several abrasive segments to abrasive tool comprises bearing element including first part with several abrasive segments and second part opposed to said first part and secured to rotary body. Note here that said second part comprises collar extending therefrom to facilitate alignment with rotary body and at least one cutout passing through said first and second parts. Method of replacement of drill bit cutting edge comprises the jobs that follow. Withdrawal of worn-out cutting edge of drill bit from cylindrical body of drill bit. Application of sound drill bit cutting edge including circular bearing element with first part with several abrasive segments secured thereto and second part opposed to first part with collar extending therefrom and at least one cutout passing through said first and second parts. Besides it comprises centring sound drill bit cutting edge second part collar relative to drill bit cylindrical body and connection of sound drill bit cutting edge to drill bit cylindrical body.

EFFECT: ease and fast attachment to abrasive tool.

14 cl, 13 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to machine building, particularly, to combination diamond tools. Proposed tool comprises shank and working head arranged at shank end and shifted relative to tool rotational axis toward its deflection. Said shank is stepped. Working head is attached to shank by its smaller-diameter step. Extra cutting element is arranged on larger-diameter step end face surface to make a part thereof. Cutting tool is arranged on end face surface with shift in circumference through 85-95 degrees from working tool point with maximum distance from tool rotational axis.

EFFECT: recess with end face perpendicular to bore axis.

2 dwg

Drill // 2477673

FIELD: process engineering.

SUBSTANCE: invention relates to machine building and may be used in drills for drilling concrete or other stone structures, rocks, etc. Said drill comprises shank with clamping lug and drilling head arranged at the end opposite said clamping lug. Said head comprises, at least, three, preferably three blades, shaped to wings in top view. Every blade comprises cutting rib at top side formed by lead chipping edge and rear side. Cutting ribs converged in central zone with center at drill axis. One long cutting rib extends in said central zone through drill axis and comprises proportionate transitional section extending beyond drill axis. Long cutting ring makes drill blade about drill axis that comprises two radially outer ends extending axially from drill blade so that rear side of one cutting rib and that of another cutting rib make flute-like recess in central zone while long cutting rib cross said recess.

EFFECT: higher drilling speed, longer life.

26 cl, 16 dwg

FIELD: process engineering.

SUBSTANCE: proposed bit comprises tubular body with annular grooves made on bit inner and outer surface to form body thinner section, and working section made up of galvanic diamond-containing layers applied on said body. Body thinner section wall thickness is selected proceeding from b1=(2.54.0) (a1+a2), where b1 is thinner section wall thickness; a1 and a2, are galvanic diamond-containing layer thickness of outer and inner surfaces, respectively, while wall thickness b of body section without groves is selected from condition b=(1.2-3.0)b1. Note here that diamond-containing layer thickness in axial direction exceeds groove length.

EFFECT: higher hardness and longer life.

2 cl, 1 dwg

Diamond tubular bit // 2419519

FIELD: process engineering.

SUBSTANCE: proposed bit comprises tubular body and discontinuous working part with intermittent cutting edge made up of diamond-containing coat on tubular body. Bit working part has through cutout oriented axially to form one slot in the plane of each cross section of bit working part. Said cutout is made over entire length of the bit working part, or is formed by, at least, two axially-oriented fragments shifted relative to each other for length of one fragment. Note here that said fragments are uniformly distributed along circumference relative to bit axis.

EFFECT: higher efficiency of small-diametre tubular bits in making deep holes.

3 cl, 8 dwg

FIELD: machine building.

SUBSTANCE: cutting plate is intended for installation and securing in the cutting tool casing, and has cutting part with cutting blade and fixture. On side view the cutting blade is made C-type with additional fixture, at that both securing parts have wedge shape in longitudinal and transverse directions, and are made mirror, between the securing parts a lower support surface is made for interaction with the support wall of the cutting tool casing, at that on the cutting part at least two additional blades are made, and between the cutting blades there are grooves for shaving. The cutting tool contains casing with rotation axis, in it the sockets are made, each socket is intended for the cutting plate installation and securing. At that the socket is located at end of the casing and has three slots along its axis of rotation and creating two resilient parts, at that outermost slots are intended for securing parts of the cutting plate installation, and are made wedge-shape in longitudinal and transverse directions, and between the outermost slots the support wall is installed to interact with the cutting plate.

EFFECT: increased productivity due to increased number of cutting blades.

2 cl, 4 dwg