CN218062315U

CN218062315U - Square plough formula diamond compact piece and shield constructs quick-witted hobbing cutter thereof

Info

Publication number: CN218062315U
Application number: CN202222185840.2U
Authority: CN
Inventors: 张钲; 任伟锋; 花波波; 陈功武
Original assignee: Zhengzhou Haocheng Superhard Tool Co ltd
Current assignee: Zhengzhou Haocheng Superhard Tool Co ltd
Priority date: 2022-08-19
Filing date: 2022-08-19
Publication date: 2022-12-16
Anticipated expiration: 2032-08-19

Abstract

The utility model provides a square plough formula diamond compact piece and shield constructs quick-witted hobbing cutter thereof, includes the compound piece body, and the compound piece body comprises polycrystalline diamond composite layer and the hard alloy layer of lower extreme of upper end, and polycrystalline diamond composite layer wholly is the ridge form, including two facets, every facet extends along X axle direction, and two facet contained angles are 75 to 165, and the top of two facets is connected through the smooth transition of facet cambered surface, and the longitudinal section of facet cambered surface is the facet pitch arc, and the radius of the circle of facet pitch arc place is 0.5 to 3mm. The utility model discloses reduced the waste of redesign steel body, can prepare out suitable hobbing cutter product fast, the hobbing cutter product wearability of producing is good, can work in stereoplasm or complicated stratum for a long time, has reduced because of the double cost rise of the shield structure shut down that changes the cutter and time and material that cause. Meanwhile, the hobbing cutter made of the composite sheet with the chip removal groove has a good chip removal effect, and the cost increase caused by plastic fluidization improvement in a viscous stratum is reduced.

Description

Square plough formula diamond compact piece and shield constructs quick-witted hobbing cutter thereof

Technical Field

The utility model relates to a superhard materials field, in particular to square plough formula diamond compact piece and shield constructs quick-witted hobbing cutter thereof.

Background

The tunneling method of the shield machine is the mainstream method of tunneling at present, and the proportion of the tunneling method in various projects, particularly municipal projects at present reaches more than 90 percent. The main working parts of the shield tunneling machine are various cutters arranged on a cutter head, wherein the most widely used cutter is a hob. The material of present hobbing cutter is mostly high hard steel, carbide etc. and its purchase cost is lower relatively, nevertheless because above-mentioned material wearability is relatively poor, damages very fast at the drilling in-process, and the life-span is shorter to lead to frequently changing the cutter, so to the comprehensive use cost of hobbing cutter just greatly rising.

The diamond composite sheet is a super-hard material widely applied in recent years, integrates the characteristics of high hardness and high wear resistance of diamond and the characteristics of impact resistance, good welding performance and the like of hard alloy, is widely applied to the mining operation in the fields of various coal fields, geology, oil gas and the like, and can be applied to various complex stratums. In particular, with the advent of profiled diamond compacts, the use of profiled diamond compacts has been enlarged in recent years. However, due to the inherent habits of the industry, no enterprise tries to use the diamond compact as a hobbing cutter stress component at present, which is not beneficial to the ordered development of the shield industry and the reduction of various drilling costs.

A reference document of publication No. CN112324349A discloses a multi-plowing diamond compact and a drill, the cross section of the product is circular along the axial direction, and the cylindrical product cannot realize complete contact of the side faces; the upper end of the comparison file is a special-shaped triangular inclined plane, and the width of the cutting edge is continuously enlarged in the using process; and the chip grooves of the comparison file are positioned on two sides of the cutting edge.

A reference document of publication No. CN104727752B discloses a polycrystalline diamond composite tooth, a manufacturing method thereof and a drill bit, the cross section of the product is circular along the axial direction, and the cylindrical product cannot realize complete contact of the side face; and the upper end of the comparison file is conical, and the cutting edge of the comparison file is a single cutting edge.

Above-mentioned two contrastive files all can't constitute complete ring, consequently can't form the hobbing cutter blade, can't be suitable for on the shield constructs the machine.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: how design a section to shield and construct the diamond compact piece of quick-witted hobbing cutter, consequently provide a square plough formula diamond compact piece and shield and construct quick-witted hobbing cutter thereof.

The technical scheme of the utility model specifically does:

the square plough type diamond compact comprises a compact body, wherein the compact body is composed of a polycrystalline diamond composite layer at the upper end and a hard alloy layer at the lower end, the polycrystalline diamond composite layer is integrally in a ridge shape and comprises two ridge surfaces, each ridge surface extends along the X-axis direction, the included angle between the two ridge surfaces is 75 to 165 degrees, the tops of the two ridge surfaces are connected through ridge surface arc surfaces in smooth transition, the longitudinal section of each ridge surface arc surface is a ridge surface arc line, and the radius of a circle where the ridge surface arc line is located is 0.5 to 3mm.

The lower part of each ridge surface is connected with a side surface, and the surface of the hard alloy layer is connected below the side surface.

In the polycrystalline diamond composite layer, the top of each ridge surface is an arc top, the middle of the arc top is high, two sides of the arc top are low, the radius of the arc top of a circle where the arc top is located is 350-650 mm, and the central angle of the circle where the arc top is located is 10-60 degrees.

The arc top of the polycrystalline diamond composite layer is provided with a chip groove, and the cross section of the chip groove is in any one of a rectangular shape, a semicircular shape, a V-shaped shape and a U-shaped shape.

The width of the chip grooves is 0.5-3mm, the depth is 1-5mm, and the number of the chip grooves is 1-5.

The shape of the combined surface of the polycrystalline diamond composite layer and the hard alloy layer is any one or combination of a plurality of planes, sawteeth and cambered surfaces.

The cross section of the hard alloy layer is square.

The total width of the composite sheet body is 8.0 to 25.4mm, the total thickness is 8.0 to 25.4mm, the total height is 5 to 19mm, and the thickness of the edge of the composite sheet is 0.8 to 3mm.

A shield machine hob made of square plough type diamond composite sheets comprises a hob steel body, wherein a plurality of composite sheet bodies are arranged on the hob steel body, and arc tops in all the composite sheet bodies are in a common circle, so that all the composite sheet bodies surround a circular ring, and the hob steel body is positioned on one side of the circular ring; the hob steel body is provided with a hole in the middle, the main shaft penetrates through the hole, and the hob steel body is arranged on the main shaft through a ball bearing.

The utility model has the advantages that: the utility model discloses rely on current hobbing cutter product steel body design, reduced the waste of redesign steel body, can prepare out suitable hobbing cutter product simultaneously fast, the hobbing cutter product wearability of producing is good, can work in stereoplasm or complicated stratum for a long time, has reduced because of the dual cost rise of the shield that changes the cutter and cause shut down and time and material. Meanwhile, the hobbing cutter made of the composite sheet with the chip removal groove has a good chip removal effect, and the cost increase caused by plastic fluidization improvement in a viscous stratum is reduced.

Drawings

FIG. 1 is a front view of a square plow type diamond compact;

FIG. 2 is a left side view of FIG. 1;

FIG. 3 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 1;

FIG. 4 is a cross-sectional view of a square plow cutting type diamond compact with a sawtooth bonding surface;

FIG. 5 is a cross-sectional view of another square plow type diamond compact with an arc-shaped bonding surface;

FIG. 6 is a front view of a square plow type diamond compact with flutes;

FIG. 7 is a partial enlarged view of FIG. 6 at B;

FIG. 8 is a cross-sectional view taken along line C-C of FIG. 6;

FIG. 9 is a schematic view of the arrangement of the composite sheet of FIG. 1 in a rotary knife;

FIG. 10 is a top view of a roller cutter made using the composite sheet of FIG. 1;

FIG. 11 is a cross-sectional view taken along line D-D of FIG. 10;

fig. 12 is a schematic view of the arrangement of the composite sheet of fig. 6 in a rotary knife.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

A coordinate system is established with the composite sheet body 1 shown in fig. 1, and the present patent application is described with this coordinate system. The transverse axis of the composite sheet body 1 is used as an X axis, the longitudinal axis of the composite sheet body 1 is used as a Y axis, and the thickness direction of the composite sheet body 1 is used as a Z axis.

As shown in fig. 1, the square plough type diamond compact for the hob of the shield machine comprises a compact body 1, wherein the compact body 1 is composed of a polycrystalline diamond composite layer 101 at the upper end and a hard alloy layer 102 at the lower end.

As shown in fig. 1 and 2, the polycrystalline diamond composite layer 101 is ridge-shaped as a whole, and includes two ridge surfaces 104, each ridge surface 104 extends along the X-axis direction, and an included angle is formed between the two ridge surfacesθThe angle is 75 to 165 degrees, the tops of the two ridge surfaces are connected through smooth transition of ridge surface arc surfaces 105, the longitudinal section of the ridge surface arc surfaces 105 is a ridge surface arc line, and the radius r of a circle where the ridge surface arc line is located is 0.5 to 3mm. It should be noted that both the ridge surfaces 104 are obliquely arranged flat surfaces.

Further, a side surface 103 is connected to a lower portion of each land surface 104, and a surface of the hard alloy layer 102 is located below the side surface 103. The side surface 103 is at an angle to the land surface 104, and the side surface 103 is parallel to the outer surface of the cemented carbide layer 102.

Further, in the polycrystalline diamond composite layer 101, the top of each ridge surface is an arc top, the middle of the arc top is high, two sides are low, the radius R of the arc top of a circle where the arc top is located is 350-650 mm, and the central angle of the circle where the arc top is located isαThe angle is 10 to 60 degrees, and two side surfaces of the arc top are perpendicular to the arc top.

Therefore, the utility model provides a square plough formula diamond compact piece, its polycrystalline diamond composite layer 101 is whole can regard as the cutting blade, so, its blade includes land 104 and land cambered surface 105. Therefore, in the actual use process, the width of the cutting edge in the soil cutting direction is consistent all the time.

Further, as shown in fig. 6, 7, and 8, the arc top of the polycrystalline diamond composite layer 101 may or may not have a flute 106, the cross-sectional shape of the flute 106 includes, but is not limited to, a rectangle, a semicircle, a V, and a U, and the flute width of the flute 106d0.5 to 3mm, depthh1 to 5mm, and the number of the chip grooves 106 is 1 to 5 in general, and the chip grooves are uniformly distributed on the arc top. It should be noted that, in the present application, the chip discharge groove 106 is located inside the continuous cutting edge, and its main function is: (1) the discharge effect on the large-diameter soil particles in the cutting process is realized, and the influence of the large-diameter soil particles on the soil body cutting efficiency is avoided; (2) the cutting machine realizes the intermittent cutting of the hard soil body and avoids the excessive abrasion of the continuous cutting edge when cutting the hard soil body.

Further, the shape of the bonding surface between the polycrystalline diamond composite layer 101 and the hard alloy layer 102 is any one or a combination of several of a plane, a sawtooth and a cambered surface. As shown in fig. 3, the joint surface of the two is a cambered surface. As shown in fig. 4, the engagement surface is serrated. As shown in fig. 5, the joint surface is a combination of an arc surface and a plane surface, wherein the joint surfaces at the two ends are the arc surfaces, and the joint surface in the middle is the plane surface.

Further, the hard alloy layer 102 has a square cross section.

Further, the total width L of the composite sheet body 1 is 8.0 to 25.4mm, the total thickness W is 8.0 to 25.4mm, and the total heightH5 to 19mm and the thickness of the edge of the composite sheetD(side surface)103 height) of 0.8 to 3mm.

Specific examples may be as shown in table 1:

table 1.

The preferred embodiment is: as shown in fig. 6, 7, 8 and 12, the square plow-type diamond compact is composed of a polycrystalline diamond composite layer 101 at the upper end and a hard alloy layer 102 at the lower end, and the shape of the combined surface of the two layers is an arc surface. The cross section of the hard alloy layer 102 is square, the polycrystalline diamond composite layer 101 at the upper end is wholly ridge-shaped, and the included angle between two ridge surfacesθIs 90 deg., and the radius r of the circle on which the arc of the land is located is 2mm. The radius R of the arc top of the circle on which the arc top is arranged is 500mm, and the central angle of the circle on which the arc top is arrangedαIs 20 degrees, and two side surfaces of the arc top are vertical to the arc top. Total length of one side of arc top of composite sheetL15.88mm, total thickness of ridge sideW15.88mm in total heightH13.2mm, thickness of the edge of the composite sheetDIs 1.5mm. The arc top of the composite sheet is provided with 3 chip grooves, and the cross sections of the chip grooves are rectangular.

The square plough type diamond composite sheet greatly improves the wear resistance and drilling efficiency of the hob, can work in hard or complex strata for a long time, and reduces shield shutdown and dual cost rise of time and materials caused by cutter replacement. Meanwhile, the hobbing cutter made of the composite sheet with the chip removal groove has a good chip removal effect, and the cost increase caused by plastic fluidization improvement in a viscous stratum is reduced.

As shown in fig. 9, 10 and 12, the hob for the shield machine comprises a hob steel body 2, wherein a plurality of composite sheet bodies 1 are arranged on the hob steel body 2, and the arc tops of all the composite sheet bodies 1 are in a common circle, so that all the composite sheet bodies 1 are enclosed into a circular ring, and the hob steel body 2 is positioned on one side of the circular ring. The hob steel body 2 is provided with a hole in the middle, the main shaft 4 penetrates through the hole, the hob steel body 2 is arranged on the main shaft 4 through a ball bearing 3, and as shown in fig. 11, the ball bearing 3 comprises a bearing end cover 301 and balls 302.

Therefore, the square plowing type diamond composite sheets are spliced into a complete circular ring whole body, so that a peripheral cutting edge of a hob of the shield tunneling machine is formed.

While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the general inventive concept, and it is intended to cover all such changes and modifications as fall within the true spirit and scope of the invention.

Claims

1. Square plough formula diamond compact, including compound piece body (1), compound piece body (1) comprises polycrystalline diamond composite layer (101) of upper end and hard alloy layer (102) of lower extreme, its characterized in that: the polycrystalline diamond composite layer (101) is integrally ridge-shaped and comprises two ridge surfaces (104), each ridge surface (104) extends along the X-axis direction, the included angle of the two ridge surfaces is 75 to 165 degrees, the tops of the two ridge surfaces are connected through ridge surface arc surfaces (105) in a smooth transition mode, the longitudinal section of each ridge surface arc surface (105) is a ridge surface arc line, and the radius of a circle where the ridge surface arc line is located is 0.5 to 3mm.

2. The square plow diamond compact of claim 1, wherein: the lower part of each ridge surface (104) is connected with a side surface (103), and the surface of the hard alloy layer (102) is connected below the side surface (103).

3. The square plow diamond compact of claim 1, wherein: in the polycrystalline diamond composite layer (101), the top of each ridge surface is an arc top, the middle of the arc top is high, two sides of the arc top are low, the radius of the arc top of a circle where the arc top is located is 350-650 mm, and the central angle of the circle where the arc top is located is 10-60 degrees.

4. The square plow diamond compact of claim 1, wherein: the arc top of the polycrystalline diamond composite layer (101) is provided with a chip groove (106), and the cross section of the chip groove (106) is in any one of a rectangular shape, a semicircular shape, a V-shaped shape and a U-shaped shape.

5. The square plow diamond compact of claim 4, wherein: the width of the chip discharge grooves (106) is 0.5-3 mm, the depth is 1-5 mm, and the number of the chip discharge grooves (106) is 1-5.

6. The square plow diamond compact of claim 1, wherein: the shape of the combined surface of the polycrystalline diamond composite layer (101) and the hard alloy layer (102) is any one or combination of a plurality of planes, sawteeth and cambered surfaces.

7. The square plow diamond compact of claim 1, wherein: the hard alloy layer (102) has a square cross section.

8. The square plow diamond compact of claim 1, wherein: the total width of the composite sheet body (1) is 8.0 to 25.4mm, the total thickness is 8.0 to 25.4mm, the total height is 5 to 19mm, and the thickness of the edge of the composite sheet is 0.8 to 3mm.

9. A shield machine hob made of the square plowing type diamond compact according to any one of claims 1 to 8, comprising a hob steel body (2), characterized in that: the hob steel body (2) is provided with a plurality of composite sheet bodies (1), and the arc tops of all the composite sheet bodies (1) are in a common circle, so that all the composite sheet bodies (1) enclose a circular ring, and the hob steel body (2) is positioned on one side of the circular ring; the hob steel body (2) is provided with a hole in the middle, the main shaft (4) penetrates through the hole, and the hob steel body (2) is installed on the main shaft (4) through the ball bearing (3).