CN201101959Y

CN201101959Y - Mold for producing diamond composite sheet

Info

Publication number: CN201101959Y
Application number: CNU2007201834275U
Authority: CN
Inventors: 朱长福
Original assignee: JINGRI-CUMI SUPER-HARD MATERIALS Co Ltd
Current assignee: JINGRI-CUMI SUPER-HARD MATERIALS Co Ltd
Priority date: 2007-10-22
Filing date: 2007-10-22
Publication date: 2008-08-20
Anticipated expiration: 2017-10-22

Abstract

The utility model relates to a die for producing carbite compound pieces, which includes a pyrophyllite composite block, at least an insulated heat preservation frame and a steel bowl. The inner part of the pyrophyllite composite block is a hollow cubical cavity body, and the six faces of the composite block have the same wall thickness; the insulated heat prevention frame is in a shape that the outer side is quadrate and the inner part is round, and the outer periphery shape is a square, the side length of which is matched with the side length of the cubical cavity body, so the insulated heat preservation frame can be positioned in the cavity body. The inner periphery of the insulated heat preservation frame is in a round shape and can be positioned in the carbite compound pieces. The wearing resistance of the carbite layer of the compound piece manufactured by using the utility model is uniform inside and outside, and the carbite layer and a horniness alloy basal body combine firmly.

Description

A kind of mould of producing diamond compact

Technical field

The utility model relates to a kind of mould of producing diamond compact, refers in particular to a kind of square cavity mold of producing diamond compact.

Background technology

Diamond compact is used for oil field drill bit manufacturing or machine tool field more, be earlier diamond dust layer 6 and hard alloy substrate 7 tentatively to be fixed together by certain technology during manufacturing, form composite sheet to be sintered, should composite sheet to be sintered put into the synthetic piece of pyrophillite again, behind the HTHP sintering, make diamond compact.In present manufacturing process, adopt belt type press or cubic hinge press no matter be, adopt direct mode of heating or indirect mode no matter also be, usually the synthetic piece of the pyrophillite of tool circular cylindrical cavity is made diamond compact in all being to use, simultaneously, graphite-pipe as heater is also cylindrical, be mounted in the circular cylindrical cavity of synthetic piece, diamond compact to be sintered (being the disk shape) then stacks in the graphite-pipe successively, by the graphite-pipe of its periphery it is heated in sintering process.Adopt the defective of this circular cylindrical cavity to be, because graphite-pipe only contacts with the circumferential section of composite sheet to be sintered, there is thermograde in radially warm field when causing heating: the temperature height of the circumferential section of composite sheet to be sintered, the temperature of core is low, thereby causes the performance of the composite sheet that sintering comes out inhomogeneous.Generally speaking, this phenomenon is not too obvious, but along with the increasing of composite sheet size, and this phenomenon is performance very outstanding just, and when the composite sheet diameter reached 30mm, its inside and outside wear resistance ratio can differ more than 30%.By proper extension heat time heating time, can improve the performance of composite sheet to a certain extent, but effect to be limited, and can to bring the hammer consumption to raise simultaneously, adverse consequences such as production efficiency reduction have increased production cost.

The utility model content

For addressing the above problem, the inventor proposes a kind of and the diverse mould of conventional method is made diamond compact.This mould comprises synthetic piece of pyrophillite and steel bowl, the synthetic piece inside of this pyrophillite is the cube cavity of hollow, make the wall thickness of six faces of this synthetic piece identical, and this mould further includes at least one can place the interior thermal insulating frame of this cavity, the shape of shape and diamond compact to be sintered is complementary in the frame of this thermal insulating frame, and this composite sheet to be sintered can be placed in this thermal insulating frame.

Use mould of the present utility model to make diamond compact, owing to be the diamond layer of composite sheet to be sintered to be carried out the face heating by graphite flake, so improved radially warm field distribution greatly, make be heated more even, cobalt in the hard alloy substrate also can be swept diamond layer more equably, and therefore, the diamond layer wearability of produced composite sheet is evenly inside and outside, and diamond layer and hard alloy substrate can not bring other adverse side effects simultaneously in conjunction with firmly yet.

Description of drawings

Fig. 1: the assembling schematic diagram that is the utility model first embodiment.

Fig. 2: the assembling schematic diagram that is the utility model second embodiment.

Fig. 3: the floor map that is thermal insulating frame in the utility model.

Description of reference numerals is as follows:

1: pyrophillite synthesizes piece 2: filling block 3: steel bowl 4: thermal insulating frame

51,52,53: graphite flake 6: diamond layer 7: hard alloy substrate

81: salt sheet 82: salt pipe 9: steel disc

The specific embodiment

Please refer to shown in Figure 1ly, mould of the present utility model comprises the filling block 2 of synthetic 4, two pyrophyllite materials of 1, two thermal insulating frame of piece of the pyrophillite of establishing cavity in one, and two steel bowls 3.Wherein, this synthetic piece 1 is cube, and its inside is the cube cavity of hollow, makes the wall thickness of 1 six faces of synthetic piece after hollowing out keep identical.On two opposite faces of this synthetic piece 1, offer two holes, so that composite sheet to be sintered (comprising diamond layer 6 and hard alloy substrate 7 in it), salt sheet 81, salt pipe 82, steel disc 9, thermal insulating frame 4 and

graphite flake

51,52 are put into this cavity, and also be convenient to lay steel bowl 3 as electrode simultaneously.As shown in Figure 3, this thermal insulating frame 4 is the framework of square-outside and round-inside, and its periphery is a square, and the length of side of the length of side and cube cavity is complementary, and makes it can be placed in the cavity; Week is circular in the framework, diameter is identical with the thickness sum of salt pipe 82 with the diameter of composite sheet to be sintered, can just in time be placed in this thermal insulating frame 4 after making the composite sheet outer peripheral edges put salt pipe 82, the thickness of this thermal insulating frame 4 is identical with the thickness sum of salt sheet 81 with composite sheet to be sintered in addition, keeps the framework flush so that place the back.As shown in Figure 1, be first embodiment of the present utility model, this embodiment mainly is applicable to the manufacturing of diamond layer 6 thickness less than the composite sheet of 2.0mm.At first paste the diamond layer 6 of two composite sheet to be sintered and placing two salt sheets 81 respectively, outer peripheral edges in two composite sheet to be sintered put salt pipe 82 respectively then, then with two composite sheet to be sintered and salt sheet 81, salt pipe 82 is put into two thermal insulating frames 4 respectively, again two thermal insulating frames 4 are inserted in the lump in the square cavity of the synthetic piece 1 of pyrophillite, need make the diamond layer 6 of two composite sheet to be sintered mutually close each other face-to-face during placement, in the middle of two salt sheets 81, place a graphite flake 51 then, make each diamond layer 6 to be carried out the face heating by graphite flake 51 by salt sheet 81, simultaneously for making circuit turn-on, in cavity, vertically place graphite flake 52 and steel disc 9 up and down respectively with graphite flake 51, graphite flake is square, its area is identical with the cross-sectional area of cavity, through hole on synthetic 1 liang of opposite face of piece is filled out with filling block 2 at last, and covers button upper steel bowl 3, and steel bowl 3 is contacted with steel disc 9 respectively, final synthetic each outer surface of piece keeps flushing, and is convenient to the operation of cubic hinge press.

See also shown in Figure 2ly, be another embodiment of the present utility model, be applicable to that mainly diamond layer 6 thickness surpass the manufacturing of the composite sheet of 2.0mm.Compare with first kind of embodiment, the difference of present embodiment is, after two thermal insulating frames 4 that composite sheet to be sintered and salt sheet 81, salt pipe 82 be housed are put into synthetic piece 1 cavity, except placing

graphite flake

51 and 52, between two hard alloy substrates 7 and cavity wall, also be placed with two graphite flakes 53 respectively, so that it is more even to be heated.

As a rule, the length of side of the synthetic piece 1 of above-mentioned pyrophillite is 30mm-120mm, its thickness is 8mm-15mm, the thickness of employed graphite flake 5 is generally 1mm-3mm, the thickness of thermal insulating frame 4 is 5mm-20mm, its framework cross section width d (as shown in Figure 3) at thin place is 1.5mm-5mm, and this thermal insulating frame 4 is selected ZrO usually for use ₂Or high temperature high voltage resistant such as MgO, there is not the material of phase transformation to make.

Above-mentioned two embodiment enumerate all is the situations of two diamond compacts of producing once, but the utility model also is applicable to one or more composite sheet of producing once simultaneously.When producing once one or more composite sheet, composite sheet to be sintered and salt sheet 81, salt pipe 82 can be inserted in the cavity of putting into synthetic piece 1 behind the thermal insulating frame 4 more in the lump, the diamond layer 6 that will guarantee each composite sheet to be sintered simultaneously must be mutually close with a graphite flake, and can carry out the face heating by the salt sheet to it by this graphite flake.In addition, if leave the space in the placement rear chamber, then can use the filling block (not shown) of pyrophyllite material that it is filled up, promptly, guarantee that space in synthetic piece 1 cavity all is filled piece and fills up really under the condition that does not influence circuit turn-on, otherwise when using cubic hinge press, can cause discontinuity or synthetic piece 1 cracked.This method is suitable for too for above-mentioned first, second embodiment.

Claims

1. mould of producing diamond compact, it comprises synthetic piece of pyrophillite and steel bowl, it is characterized in that: the synthetic piece of this pyrophillite inside is the cube cavity of hollow, make the wall thickness of six faces of this synthetic piece identical, and this mould further includes at least one can place the interior thermal insulating frame of this cavity, the shape of shape and diamond compact to be sintered is complementary in the frame of this thermal insulating frame, and this composite sheet to be sintered can be placed in this thermal insulating frame.

2. the mould of production diamond compact as claimed in claim 1 is characterized in that: described thermal insulating frame is a square-outside and round-inside shape, and its periphery is a square, and the length of side of the length of side and cube cavity is complementary.

3. the mould of production diamond compact as claimed in claim 2 is characterized in that: the thickness of the thickness of described thermal insulating frame and diamond compact to be sintered is complementary.