CN215057149U - Triangular-toothed polycrystalline diamond compact - Google Patents

Abstract

The utility model aims at providing a three-edged tooth polycrystalline diamond compact, which comprises a hard alloy substrate and a polycrystalline diamond composite layer, wherein the upper surface of the polycrystalline diamond composite layer is provided with three beads with high centers and low peripheries, a chip removal concave surface is arranged between the two beads, and the three beads are upward triangular beads on the cross section of the three beads; the structural design of the drill tooth composite layer keeps the original impact toughness, the cutting area of the composite sheet is not reduced, and the drilling efficiency of the drill tooth is improved.

Description

Triangular-toothed polycrystalline diamond compact

Technical Field

The utility model relates to a synthetic preparation technical field of polycrystalline diamond compact, more specifically the theory says, relates to a three-edged tooth polycrystalline diamond compact.

Background

Polycrystalline Diamond Compact (PDC) is a novel superhard composite material which is synthesized by a polycrystalline diamond cutting layer and a hard alloy substrate layer at a time under the conditions of high temperature and high pressure, has the high hardness, high wear resistance and heat conductivity of diamond and the high strength and high impact toughness of hard alloy, and is widely applied to the fields of oil and gas exploitation, engineering tools, cutter materials, aerospace and the like.

In the exploitation and drilling of geology, petroleum and coal fields, a drill bit mostly adopts polycrystalline diamond compact drilling teeth to cut and drill rocks, and when the drill bit meets a stratum containing gravels or the condition that the soft and hard of the stratum are complicated, the diamond compact is easy to break the teeth and delaminate, so that the drill bit is failed integrally. The existing product is provided with three convex narrow blades or wide blades on the upper surface of the polycrystalline diamond composite layer, and the convex narrow blades are beneficial to playing a role in extruding and crushing in the cutting process, so that the impact resistance of the composite sheet is improved, but the cutting area is reduced compared with the traditional plane composite sheet, and the mechanical drilling speed is influenced. The raised wide edges increase the cutting area of the polycrystalline diamond composite layer, so that the mechanical drilling speed is increased, but the extrusion and crushing effects are weakened, so that the impact resistance of the composite sheet is reduced, and the existing triangular tooth technology is still to be improved.

SUMMERY OF THE UTILITY MODEL

To the problem that exists among the above-mentioned prior art, the utility model aims at providing a three prismatic tooth polycrystalline diamond compact for the structural design who bores the tooth composite bed both keeps original impact toughness, does not reduce the cutting area of compound piece again, improves the efficiency of creeping into of brill tooth.

The purpose of the utility model is realized with the following mode:

the utility model provides a three prismatic teeth polycrystalline diamond compact, includes carbide base member and polycrystalline diamond composite bed, and polycrystalline diamond composite bed upper surface is three beads that center height is peripheral low, is the chip removal concave surface between two beads, three beads are the bead of ascending triangle-shaped on its cross section. The apex angle of the triangle is 30-169 degrees, and the preferred apex angle is 85 degrees.

The length of two sides of the triangle is 1-5mm, and the preferable length is 2 mm. The closed area formed by the intersection of the ridge lines of the three convex ridges at the top is a circular arc-edge triangular curved surface with a high center. The two sides of the chip removal concave surface are curved surface triangular slopes, and an arc groove is formed between the curved surface triangular slopes.

The edges of the three convex edges are divided into 3 sections, an edge straight line section is arranged from the edge inwards, an edge curve section is arranged between the two straight line sections, the edge straight line section corresponds to the curved surface triangular slope, and the edge curve section corresponds to the circular arc groove.

And smooth curved surface transition is formed between the arc groove and the curved surface triangular slope.

The included angle between the concave chip removal surface and the horizontal direction is 1-45 degrees, and the preferred included angle is 18 degrees.

The height of the hard alloy matrix is 8-12mm, and preferably the height of the hard alloy matrix is 9.7 mm; the height of the polycrystalline diamond composite layer is 2-5mm, and the preferable height of the polycrystalline diamond composite layer is 3.5 mm; the hard alloy matrix and the polycrystalline diamond composite layer have the same diameter and are 13-20 mm; preferred diameters are 13.44mm,15.88mm, and 19.05 mm.

The distance between the highest point of the upper surface of the polycrystalline diamond composite layer and the highest point of the side contour line of the polycrystalline diamond composite layer is 0.5-3mm, and the preferred distance is 1.5 mm.

Compared with the prior art, the utility model discloses can:

1. three beads that polycrystalline diamond composite bed upper surface set up are as main cutting edge, and the side that the side of bead, chip removal concave surface and polycrystalline diamond composite bed intersects and forms is as side cutting edge, and main cutting edge and side cutting edge all are sharp point form, get into the geological stratification more easily, have reduced the cutting resistance, have improved smear metal efficiency, and mechanical rotational speed is faster.

2. Three beads that polycrystalline diamond composite bed upper surface set up are non-planar structure, are the arc arch that high both sides are low in the middle of, and this kind of non-planar protruding structure has increased polycrystalline diamond composite bed's cutting face area, has improved compound piece's shock resistance and wearability, has improved life.

3. The chip removal concave surface is a concave surface with a certain inclination, which is beneficial to dispersing chips, discharging the chips in a direction and improving the chip removal capability.

Drawings

Fig. 1 is a front view of an embodiment of the present invention.

Fig. 2 is a left side view of an embodiment of the present invention.

Fig. 3 is a top view of an embodiment of the present invention.

Fig. 4 is a perspective view of an embodiment of the present invention.

Fig. 5 is a cross-sectional view of an embodiment of the present invention.

Wherein 1 is a cemented carbide substrate; 2 is a polycrystalline diamond composite layer; 21 is a rib; 211 is a cross section; 212 is a side edge; 213 is a ridge; 214 is a straight edge segment; 215 is an edge curve segment; 22 is a chip removal concave surface; 221 is a curved triangular ramp; 222 is a circular arc groove; 23 is a circular-arc-edge triangular curved surface.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The utility model provides a three prismatic teeth polycrystalline diamond compact, includes carbide base member 1 and polycrystalline diamond composite bed 2, and polycrystalline diamond composite bed upper surface is three beads 21 that center height is peripheral low, is the chip removal concave surface 22 between two beads 21, three beads are the bead of ascending triangle-shaped on its cross section 211. The apex angle of the triangle is 30-169 degrees, and the preferred apex angle is 85 degrees.

The two sides 212 of the triangle are 1-5mm in length, preferably 2mm in length. The closed area formed by the intersection of the crest lines 213 of the three convex ridges at the top is a circular arc triangle curved surface 23 with a high center. The two sides of the concave chip removal surface 22 are curved triangular slopes 221, and an arc groove 222 is arranged between the curved triangular slopes 221.

The edges of the three convex edges are divided into 3 sections, an edge straight line section 214 is arranged from the edge inwards, an edge curve section 215 is arranged between the two straight line sections, the edge straight line section corresponds to a curved surface triangular slope, and the edge curve section corresponds to an arc groove.

The arc groove 222 and the curved triangular slope 221 form a smooth curved transition.

The included angle between the concave chip removal surface 22 and the horizontal direction is 1-45 degrees, and the preferred included angle is 18 degrees.

The height of the hard alloy matrix 1 is 8-12mm, and the preferred height of the hard alloy matrix is 9.7 mm; the height of the polycrystalline diamond composite layer 2 is 2-5mm, and the preferable height of the polycrystalline diamond composite layer is 3.5 mm; the hard alloy matrix 1 and the polycrystalline diamond composite layer 2 have the same diameter and are 13-20 mm; preferred diameters are 13.44mm,15.88mm, and 19.05 mm.

The distance between the highest point of the upper surface of the polycrystalline diamond composite layer 2 and the highest point of the side contour line of the polycrystalline diamond composite layer is 0.5-3mm, and the preferred distance is 1.5 mm.

The utility model discloses in triangular tooth be integrative press forming or later stage machine-shaping. As shown in fig. 1-4, a front view, a left side view, a top view and a perspective view of an embodiment. The utility model provides a three triangular teeth polycrystalline diamond compact includes carbide base member 1 and sets up polycrystalline diamond composite bed 2 above that, polycrystalline diamond composite bed's upper surface is three beads that high both sides are low in the middle of, three beads are the bead of ascending triangle-shaped shape on its cross section, triangle-shaped generally is isosceles triangle (isosceles triangle includes equilateral triangle), the length of the last two equal sides of isosceles triangle equals the width on two inclined planes of bead, the size of the contained angle between two inclined planes on the bead is decided to the size of isosceles triangle's apex angle. The two inclined planes of the convex edge are intersected to form a sharp convex edge, and the sharp convex edge is a ridge line of the convex edge, and the ridge line is a main cutting edge of the polycrystalline diamond compact drilling tooth in the cutting process. The edge parallel to the ridge line to form the outline of the convex edge is the edge of the convex edge, two short edges formed by the intersection of the convex edge and the side surface of the polycrystalline diamond composite layer are the side edges of the convex edge, and the side edges are also side cutting edges. The crest line of bead and the edge of bead all constitute by the three-section: from the outer edge inwards are straight line segments, and a curve segment is arranged between the two straight line segments. This kind of compound piece's bead can continuously keep higher broken rock to creep into efficiency in the in-service use, and this kind of compound piece and original compound piece carry out experimental contrast, and the experimental result shows, and compound piece mechanical rotational speed before the improvement is 2.97m/min, and is also exactly after the improvement the utility model discloses compound piece's mechanical rotational speed is 5.58m/min, improves about 1.8 times original.

The types of the ridge line of the convex edge and the curve section on the ridge line can be common curves such as a circular arc curve, a parabolic curve, a hyperbolic curve, an elliptic curve, a trigonometric function curve and the like.

In the embodiment, the convex edge is in an isosceles triangle with the vertex angle of 120 degrees and the length of two sides of 2mm on the cross section.

The closed area formed by the intersection of the ridge lines of the three convex edges is an arc-side triangular curved surface 23 protruding upwards, on the longitudinal section of the polycrystalline diamond compact, the projection line of the arc-side triangular curved surface is an arc curve with the center line on the center line, the arc radius is 28mm-48mm, and the larger the arc radius is, the closer the arc-side triangular curved surface is to the plane. The arc triangle-shaped curved surface and the bead bear main impact load, the design of the arc curved surface increases the surface area of the cutting surface of the polycrystalline diamond composite layer, the non-planar structure improves the impact toughness and the wear resistance of the composite sheet, the service life of the composite sheet is prolonged, and in the embodiment, the arc radius is 45 mm.

A concave chip removal surface 22 is arranged between the convex rib and the side surface of the polycrystalline diamond composite layer. The concave chip discharging surface 22 is composed of curved triangular slopes 221 on two sides and a middle arc groove 222, the curved triangular slope 221 corresponds to a straight line section 214 of the upper edge of the convex edge, the arc groove 222 corresponds to a curved line section 215 of the upper edge of the convex edge, and smooth curved surface transition is formed between the curved triangular slope 221 and the arc groove 222. The radius of the arc groove is 30mm-50mm, the included angle between the projection of the chip removal concave surface in the vertical direction and the horizontal direction is 1-45 degrees, and the included angle is 18 degrees in the embodiment. The intersection line of the chip removal concave surface and the side surface of the polycrystalline diamond composite layer is also a side cutting edge.

solidworks drawing procedure:

1. forming a hard alloy matrix: drawing FIG. 1, drawing a cylinder 9.7mm high and 15.88mm in diameter. 2. Forming a polycrystalline diamond composite layer: drawing a sketch 2, rotating 360 degrees along the central axis to form a cylinder with an upper surface being a circular arc surface and a height of 3.5 mm. 3. Chip removal recess's formation: establishing a reference surface at the top end of the arc surface, drawing equidistant curved surfaces, drawing a sketch, stretching the curved surfaces, cutting the curved surfaces, drawing a 3D sketch, scanning the curved surfaces, cutting off the rotating body by using the scanned curved surfaces, forming a chip removal concave surface on the upper surface of the rotating body, and forming 3 chip removal concave surfaces which are symmetrical along the center in an array manner. 4. And (3) forming the convex ribs: drawing equidistant curved surfaces of the arc surfaces at the position 0.5mm above the arc surfaces, and extending 5mm along the radial direction of the curved surfaces. 5. Drawing a triangular curve, and lofting along the triangular curve and the outline of the sketch to form a rib. 6. Forming a polycrystalline diamond compact: drawing a stretched curved surface, and cutting out a circumferential contour by using the curved surface so as to keep the same with the diameter of the cylinder. 7. And sewing all the cut curved surfaces to form the upper surface of the polycrystalline diamond layer. 8. The thickness is increased by 2mm along the profile of the convex rib.

The above-mentioned drawing process is only one specific embodiment, and there are many different drawing methods in the same embodiment, and the embodiment is only one of them, and the present invention has many embodiments and each embodiment is not limited to only this drawing method and drawing step.

Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.

Claims (10)

1. The utility model provides a three prismatic teeth polycrystalline diamond compact, includes carbide base member (1) and polycrystalline diamond composite bed (2), polycrystalline diamond composite bed upper surface is three beads (21) that center height is peripheral low, is chip removal concave surface (22) between two beads (21), its characterized in that: the three ribs are triangular ribs with upward cross sections (211).

2. The trigonal-toothed polycrystalline diamond compact of claim 1, wherein: the apex angle of the triangle is 30-169 degrees.

3. The trigonal-toothed polycrystalline diamond compact of claim 1, wherein: the length of two sides (212) of the triangle is 1-5 mm.

4. The trigonal-toothed polycrystalline diamond compact of claim 1, wherein: the closed area formed by the intersection of the crest lines (213) of the three convex edges at the top is a circular arc edge triangular curved surface (23) with a high center.

5. The trigonal-toothed polycrystalline diamond compact of claim 1, wherein: the two sides of the chip removal concave surface (22) are curved triangular slopes (221), and arc grooves (222) are formed between the curved triangular slopes (221).

6. The trigonal-toothed polycrystalline diamond compact of claim 2, wherein: the edges of the three convex edges are divided into 3 sections, an edge straight line section (214) is arranged from the edge inwards, an edge curve section (215) is arranged between the two straight line sections, the edge straight line section corresponds to a curved surface triangular slope, and the edge curve section corresponds to an arc groove.

7. The trigonal-toothed polycrystalline diamond compact of claim 5, wherein: the arc groove (222) and the curved triangular slope (221) are in smooth curved surface transition.

8. The trigonal-toothed polycrystalline diamond compact of claim 1, wherein: the included angle between the concave chip removal surface (22) and the horizontal direction is 1-45 degrees.

9. The trigonal-toothed polycrystalline diamond compact of claim 1, wherein: the hard alloy matrix (1) is 8-12mm high; the polycrystalline diamond composite layer (2) is 2-5mm high; the hard alloy matrix (1) and the polycrystalline diamond composite layer (2) have the same diameter of 13-20 mm.

10. The trigonal-toothed polycrystalline diamond compact of claim 1, wherein: the distance between the highest point of the upper surface of the polycrystalline diamond composite layer (2) and the highest point of the side contour line of the polycrystalline diamond composite layer is 0.5-3 mm.

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