CN2893123Y - Hard alloy borer insert - Google Patents

Abstract

The utility model discloses a hard alloy drill rod plate, which comprises a plate body and a concave cambered symmetrical surface that is arranged at the two lateral sides of the plate body. The technical plan is actually specified as follows: the symmetrical parallel surfaces at the two sides of the existing hard alloy drill rod plate are changed into the concave cambered symmetrical surfaces at the two sides. The improvement further applies the smooth arc transition so as to increase the thickness of the two radial ends of the drill plate and enhance the radial impact- resisting and wear-resisting performances of the two ends of the drill rod plate. Therefore, the drill rod plate can be made to maintain uniform and consistent wear in the radial direction, while the arc transition can add the thickness of the two ends of the drill rod plate so as to avoid the taper angle stress point and prevent rupture source from occurring; on the other hand, the brazing area can be increased and the maximum slack inner stress can be obtained, thereby increasing the emitting area of the lateral crushing stress, and enhancing the welding firmness between the drill rod plate and the pants body. The effect brought by the improvement is to prolong the service life of the drill rod.

Description

A kind of brazing sheet of hard alloy

Technical field

The utility model belongs to the mine boring tool, is specifically related to a kind of brazing sheet of hard alloy.

Background technology

At present, the production of most of brazing sheet of hard alloy and exterior design are all continued to use the technology of the fifties initial stage Soviet Union, and this technology is that the pricker sheet is fixed in the pricker trousers groove by high temperature brazing, and the solder side of pricker sheet and pricker trousers groove all is the plane.Along with the raising of new product, new technology, new equipment and mine benefit, also more and more higher to the requirement of brazing sheet of hard alloy.There is following problem in the bore bit of producing according to prior art: the one, and bore bit is in use, the pricker sheet diametrically its two ends than the easier wearing and tearing of middle body, that is to say that there is the uneven phenomenon of wearing and tearing diametrically in the pricker sheet, but also the situation of pricker sheet sealing-off usually can take place, cause bore bit to be scrapped in early days, increase cost of production; The 2nd, be difficult in brazing process guarantee that the pricker sheet is accurately positioned in central authorities in the groove, it is asymmetric weld seam often to occur, the situation that both sides are unequal, because the brazing sheet of hard alloy on the bore bit usually can form bigger internal stress after high temperature brazing, this asymmetric, unequal weld seam will cause pricker sheet internal stress to disappear inhomogeneous, simultaneously unequal, asymmetric weld seam also will be asymmetric to the compressive stress of alloy pricker sheet, unequal, under the serious situation even can when bore bit does not use, just go out pricker sheet sliver phenomenon, in case use and to cause fragment, cause product to be scrapped in early days, therefore, the bore bit product percent of pass of producing according to prior art is not high, application life is not long, and driving speed is general, has only about 500 meters.In mining, production efficiency and benefit are all brought influence, and cause a large amount of wastes of China's strategy tungsten resource.

Summary of the invention

In order to overcome above-mentioned the deficiencies in the prior art, first order of the present utility model provide a kind of can keep diametrically wearing and tearing the comparison uniformity and can increase and the trousers body between the welding fastness, be not easy the brazing sheet of hard alloy of sealing-off.

Second purpose of the present utility model is to provide to be accurately positioned in central authorities in the trousers body groove on the basis of first purpose, guarantees two side weld symmetries, and impartial brazing sheet of hard alloy.

Realize that the technical scheme that first purpose of the utility model adopts is: brazing sheet of hard alloy, comprise lamellar body, the two sides of lamellar body are the arc plane of symmetry that concaves.The bilateral symmetry parallel surface that this technical scheme is actually existing brazing sheet of hard alloy changes the arc plane of symmetry that both sides concave into, this improvement adopts slick and sly arc excessively to increase the radially thickness at two ends of pricker sheet on the one hand, can improve the radially impact resistance and the abrasion resistance at pricker sheet two ends, make the wearing and tearing diametrically of pricker sheet keep uniformity, excessively increase the thickness at pricker sheet two ends by arc, can avoid producing the wedge angle stress point, prevent fracture origin; Can increase the soldering area on the other hand, loose to greatest extent internal stress increases side direction compressive stress emission area, improves the welding fastness between pricker sheet and the trousers body.The effect that improvement brings is the application life of having improved bore bit.

Realize that the technical scheme that second purpose of the utility model adopts is: on the spill cambered surface of brazing sheet of hard alloy lamellar body both sides, be provided with the identical locating piece of rising height, the shape of locating piece can be a different shape, as bar shaped, circle, semicircle sphere, square, Else Rule or irregular shape, the locating piece on the spill cambered surface of pricker sheet both sides can be symmetrical arranged also and can asymmetricly be provided with.The pricker sheet adopts contour locating piece location, the rising height of locating piece is substantially equal to the gap that the pricker sheet is put into trousers body pricker film trap, make the pricker sheet can accurately be fixed on the middle position of bore bit cell body, just can guarantee during soldering that throat depth is even, symmetry, bonding area increases, weld strength height and uniformity, thereby make brazing sheet of hard alloy can be subjected to weld seam compressive stress greatly and uniformly, guarantee that the internal stress that brazing sheet of hard alloy produces because of high temperature brazing at brazing process disappears soon and uniformity, make the pricker piece performance keep stablizing and not changing, keep the intensity unanimity, prevent the sliver phenomenon, guarantee its high strength under the normal temperature user mode, high-wearing feature, improve the bore bit product percent of pass, obviously prolonged the application life of bore bit, and mine efficient and benefit increase, and Excavation Length reaches 800 ~ 900 meters.

Can make brazing sheet of hard alloy when high temperature brazing, can accurately be fixed on the middle position of bore bit cell body, guarantee the gap unanimity, obtain weld seam symmetrically, improve preferably and eliminate internal stress equably, evenly increase and strengthen the side direction compressive stress, improve the stability under the pricker sheet high temperature, guarantee its high strength, high-wearing feature under the normal temperature user mode.

Below in conjunction with accompanying drawing, further specify the technical scheme of utility model.

Description of drawings

Fig. 1 is the front view of utility model pricker sheet.

Fig. 2 is the left view of Fig. 1.

Fig. 3 is the vertical view of Fig. 1.

Fig. 4, Fig. 5 are different structure schematic diagrames of the present utility model.

Fig. 6 is user mode figure of the present utility model.

The specific embodiment

See Fig. 1, Fig. 2, Fig. 3, the utility model pricker sheet comprises lamellar body 1, and the two sides 3 of lamellar body 1 are arcs of recesses and symmetry, and the identical locating piece of strip rising height 2 is arranged on the arcuate flanks 3, has two locating pieces to be symmetrically distributed on each arcuate flanks 3.The different structure of the utility model pricker sheet is seen Fig. 4, Fig. 5, the one, and there is the spherical locating piece 2 of four circles or semicircle to be symmetrically distributed on each arcuate flanks 3 of pricker sheet lamellar body, the 2nd, locating piece 2 is three symmetrical distributions.

As shown in Figure 6, pricker sheet lamellar body 1 is through being fixed on after the high temperature brazing on the bore bit trousers body 5, because the rising height of the locating piece 2 on the both sides of lamellar body 1 is identical, and weld seam 4 consistency of thickness of formation between lamellar body 1 and the trousers body 5.

Claims (6)

1, a kind of brazing sheet of hard alloy comprises lamellar body, and the two sides that it is characterized in that lamellar body are the arc plane of symmetry that concaves.

2, brazing sheet of hard alloy according to claim 1 is characterized in that there is the identical locating piece of rising height the both sides of lamellar body.

3, brazing sheet of hard alloy according to claim 2, the shape that it is characterized in that locating piece are bar shaped, circle, semicircle sphere, square, Else Rule or irregular shape.

4, brazing sheet of hard alloy according to claim 3 is characterized in that locating piece is symmetrical arranged, or asymmetric setting.

5, brazing sheet of hard alloy according to claim 4 is characterized in that the locating piece on the lamellar body is bar shaped, and two symmetrical distributions are arranged on each side.

6, brazing sheet of hard alloy according to claim 4 is characterized in that the locating piece on the lamellar body is circle or semicircle sphere, and four or three symmetrical distributions are arranged on each side.