阅读说明：本技术 一种热压烧结磨轮及其工艺 (Hot-pressed sintered grinding wheel and process thereof ) 是由 陈超 于 2020-07-02 设计创作，主要内容包括：本发明公开了一种热压烧结磨轮,包括基体,基体为圆形,基体设有阶梯部,阶梯部包括第一阶梯部,第二阶梯部和第三阶梯部；设置于第一阶梯部的圆形安装孔；环设于第二阶梯部顶部的菱形排屑孔,第二阶梯部的顶部为弧形；环设于第三阶梯部的第一磨削部,第一磨削部为均匀排列的六角型磨削片,六角型磨削片设有波纹部；环设于第一磨削部外的第二磨削部,第二磨削部为环形磨削片,环形磨削片设有V型割槽。本发明通过在第一磨削部设置六角型磨削片和在第二磨削部设置环形磨削片,大大提高了排屑能力,使得排屑流畅,进一步提高了磨削的精度和使用寿命,保证了磨轮经久耐用。(The invention discloses a hot-pressing sintered grinding wheel which comprises a base body, wherein the base body is circular, the base body is provided with a step part, and the step part comprises a first step part, a second step part and a third step part; a circular mounting hole arranged on the first step part; the diamond chip removal holes are annularly arranged at the top of the second stepped part, and the top of the second stepped part is arc-shaped; the first grinding part is annularly arranged on the third step part, the first grinding part is hexagonal grinding sheets which are uniformly arranged, and the hexagonal grinding sheets are provided with corrugated parts; the second grinding part is annularly arranged outside the first grinding part and is an annular grinding sheet, and the annular grinding sheet is provided with a V-shaped cutting groove. According to the invention, the hexagonal grinding sheet is arranged on the first grinding part and the annular grinding sheet is arranged on the second grinding part, so that the chip removal capability is greatly improved, the chip removal is smooth, the grinding precision is further improved, the service life is further prolonged, and the durability of the grinding wheel is ensured.)

1. The hot-pressed sintered grinding wheel is characterized by comprising a base body, wherein the base body is circular, and is provided with a step part, and the step part comprises a first step part, a second step part and a third step part;

a circular mounting hole provided in the first step portion;

the rhombic chip removal holes are annularly arranged at the top of the second stepped part, and the top of the second stepped part is arc-shaped;

the first grinding part is annularly arranged on the third step part, the first grinding part is hexagonal grinding sheets which are uniformly arranged, and the hexagonal grinding sheets are provided with corrugated parts;

the second grinding part is annularly arranged outside the first grinding part and is an annular grinding sheet, and the annular grinding sheet is provided with a V-shaped cutting groove.

2. The hot pressed sintered abrasive wheel according to claim 1, wherein the hexagonal grinding chips are in 6 groups and the rhombic clearance holes are in 5 groups.

3. The hot pressed sintered abrasive wheel of claim 1, wherein said first grinding portion is higher than said second grinding portion.

4. The hot pressed sintered abrasive wheel of claim 1, wherein said substrate is stainless steel.

5. The hot pressed sintered abrasive wheel of claim 1, wherein said V-shaped grooves have a width of 1-2CM, and said V-shaped grooves are uniformly circumferentially disposed in said annular grinding segment.

6. The hot pressed sintered abrasive wheel of claim 1, wherein said first grinding portion, said second grinding portion and said third step are electrically welded.

7. The hot pressed sintered abrasive wheel of claim 1, wherein the composition of the first grinding portion and the second grinding portion comprises diamond, cubic boron nitride, a resin binder, and copper.

8. The hot pressed sintered abrasive wheel of claim 1, wherein the first grinding portion and the second grinding portion have a composition weight ratio of: 5:3:1:1.

9. The hot pressed sintered abrasive wheel of claim 1, wherein said resin bond is provided with 20% tin powder.

10. A hot pressing process for manufacturing a hot pressed sintered abrasive wheel according to any of the preceding claims, comprising the steps of: (1) uniformly mixing diamond, cubic boron nitride, resin adhesive and copper which are used as preparation raw materials of a grinding wheel to obtain a mixture;

(2) cold pressing: loading a matrix in a mold in advance, adding the mixed mixture into a mold of cold press molding equipment for integral press molding, and demoulding, wherein the cold press pressure is 2.5-3.5T/cm2, the pressure is maintained for 3-5s, and the pressing time is 8-10 s;

(3) hot-pressing and sintering: sintering the cold-pressed and molded crude product in a dry sintering furnace, wherein the heating temperature T =860-880 ℃, the sintering time is 1.5-2h, and nitrogen-hydrogen mixed gas is introduced in the sintering process, and the introduction amount is 0.5-0.8m 3/min;

(4) and (3) cooling: after sintering, removing the finished product, continuously cooling by using the nitrogen-hydrogen mixed gas, introducing the nitrogen-hydrogen mixed gas with the amount of 0.8-1.0 m3/min, and cooling for 2-2.5h to prepare the grinding part;

(5) and welding the grinding part and the base body into a whole through a brazing process.

Technical Field

The invention relates to the field of metal grinding processing, in particular to a hot-pressed sintered grinding wheel and a process thereof.

Background

As is well known, the grinding wheel is generally adopted in the grinding process, the existing grinding wheel generally comprises a base body and grinding sheets arranged on the circumference of the base body, the grinding sheets are provided with radial grooves distributed along the circumference of the base body in a circular mode to divide the grinding sheets into a plurality of grinding surfaces, the existing structure can be used for grinding, but the grinding wheel is single in structural design, on one hand, grinding scraps generated in the grinding process are difficult to remove, the grinding precision and the service life are influenced, on the other hand, the heat dissipation performance is poor, the heat is too high, the grinding wheel is easy to lose efficacy, on the other hand, the single structural design ensures that the grinding speed is difficult to guarantee, and the whole grinding efficiency is influenced.

Disclosure of Invention

The hexagonal grinding sheet is arranged on the first grinding part, the annular grinding sheet is arranged on the second grinding part, the chip removal capacity is greatly improved, the chip removal is smooth, the grinding precision is further improved, the service life is further prolonged, and the durability of the grinding wheel is ensured. In addition, the grinding speed is improved due to the design of the V-shaped groove, so that the grinding efficiency is improved, and the using effect is better.

In order to solve the technical problem, the invention discloses a hot-pressing sintered grinding wheel which comprises a base body, wherein the base body is circular, the base body is provided with a step part, and the step part comprises a first step part, a second step part and a third step part; a circular mounting hole arranged on the first step part; the diamond chip removal holes are annularly arranged at the top of the second stepped part, and the top of the second stepped part is arc-shaped; the first grinding part is annularly arranged on the third step part, the first grinding part is hexagonal grinding sheets which are uniformly arranged, and the hexagonal grinding sheets are provided with corrugated parts; the second grinding part is annularly arranged outside the first grinding part and is an annular grinding sheet, and the annular grinding sheet is provided with a V-shaped cutting groove.

According to an embodiment of the present invention, the hexagonal grinding plates are 6 groups, and the rhombic clearance holes are 5 groups.

According to an embodiment of the present invention, the first grinding portion is higher than the second grinding portion.

According to an embodiment of the present invention, the substrate is made of stainless steel.

According to an embodiment of the present invention, the width of the V-shaped cutting groove is 1-2CM, and the V-shaped cutting groove is uniformly and annularly disposed on the annular grinding sheet.

According to an embodiment of the present invention, the first ground portion, the second ground portion and the third step portion are electrically welded.

According to an embodiment of the present invention, wherein the composition of the first grinding part and the second grinding part includes diamond, cubic boron nitride, a resin binder, and copper.

According to an embodiment of the present invention, the ratio of the weight of the composition of the first grinding portion and the second grinding portion is: 5:3:1:1

According to an embodiment of the present invention, the resin binder is provided with 20% of tin powder.

A hot pressing process for manufacturing a hot pressed sintered abrasive wheel according to any of the preceding claims, comprising the steps of: (1) uniformly mixing diamond, cubic boron nitride, resin adhesive and copper which are used as preparation raw materials of a grinding wheel to obtain a mixture;

(2) cold pressing: loading a matrix in a mold in advance, adding the mixed mixture into a mold of cold press molding equipment for integral press molding, and demoulding, wherein the cold press pressure is 2.5-3.5T/cm2, the pressure is maintained for 3-5s, and the pressing time is 8-10 s;

(3) hot-pressing and sintering: sintering the cold-pressed and molded crude product in a dry sintering furnace, wherein the heating temperature T =860-880 ℃, the sintering time is 1.5-2h, and nitrogen-hydrogen mixed gas is introduced in the sintering process, and the introduction amount is 0.5-0.8m 3/min;

(4) and (3) cooling: after sintering, removing the finished product, continuously cooling by using the nitrogen-hydrogen mixed gas, introducing the nitrogen-hydrogen mixed gas with the amount of 0.8-1.0 m3/min, and cooling for 2-2.5h to prepare a grinding part;

(5) and then the grinding part and the base body are welded into a whole through a brazing process.

Compared with the prior art, the application can obtain the following technical effects:

1) through set up hexagonal type grinding piece and set up annular grinding piece at second grinding portion in first grinding portion, improved the chip removal ability greatly for the chip removal is smooth, has further improved the precision and the life of grinding, has guaranteed emery wheel durable. In addition, the grinding speed is improved due to the design of the V-shaped groove, so that the grinding efficiency is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a plan view of a hot pressed sintered abrasive wheel according to an embodiment of the present application.

Reference numerals

The cutting tool comprises a base body 10, a first stepped portion 20, a circular mounting hole 21, a second stepped portion 30, a diamond-shaped chip removal hole 31, a third stepped portion 40, a first grinding portion 50, a hexagonal grinding sheet 51, a corrugated portion 52, a second grinding portion 60, an annular grinding sheet 61 and a V-shaped cutting groove 62.

Detailed Description

Embodiments of the present application will be described in detail with reference to the drawings and examples, so that how to implement technical means to solve technical problems and achieve technical effects of the present application can be fully understood and implemented.

Referring to fig. 1, fig. 1 is a top view of a hot pressed sintered abrasive wheel according to an embodiment of the present disclosure. As shown in the drawings, a hot pressed sintered abrasive wheel includes a base body 10, the base body 10 having a circular shape, the base body 10 being provided with stepped portions including a first stepped portion 20, a second stepped portion 30 and a third stepped portion 40; a circular mounting hole 21 provided in the first step portion 20; the rhombic chip removal holes 31 are annularly arranged at the top of the second stepped part 30, and the top of the second stepped part 30 is arc-shaped; a first grinding part 50 annularly arranged on the third step part 40, wherein the first grinding part 50 is a hexagonal grinding sheet 51 which is uniformly arranged, and the hexagonal grinding sheet 51 is provided with a corrugated part 52; and a second grinding part 60 arranged outside the first grinding part 50 in a surrounding manner, wherein the second grinding part 60 is an annular grinding sheet 61, and the annular grinding sheet 61 is provided with a V-shaped cutting groove 62.

In the embodiment of the invention, the round base body 10 used by the worker has better hand feeling and smoother grinding. The substrate 10 is formed in a stepped shape, which increases both the heat dissipation area and the chip discharge accommodation area. The grinding wheel is arranged on the machine through the mounting hole of the first step part 20 for grinding, so that the grinding process is simple and convenient; not only through the arc top of second step portion 30, increased the accommodation area of ash bits, discharge rubbish through rhombus chip removal hole 31 fast again, rhombus chip removal hole 31 has still played a function that reduces base member 10 weight, alleviates staff's burden. The hexagonal grinding sheet 51 is arranged on the first grinding part 50, the corrugated part 52 is arranged on the surface of the hexagonal grinding sheet 51, garbage is rapidly discharged through the corrugated part 52, and then a cutting groove is formed through the hexagonal unique shape, so that the chip removal efficiency is increased. Firstly, the grinding of the first grinding part 50 is carried out, then the second grinding part 60 is used, the grinding precision is further improved, the service life of the grinding wheel is further prolonged, the grinding speed is improved due to the design of the V-shaped groove, and the grinding efficiency is improved.

Preferably, there are 6 groups of hex-shaped grinding chips 51 and 5 groups of diamond-shaped clearance holes 31. After a plurality of tests, the effect is good.

Further, the first grinding portion 50 is higher than the second grinding portion 60. The object is polished by the first grinding part 50, so that a user can see the abrasion condition of the grinding disc conveniently, and meanwhile, the second grinding part 60 enhances the abrasion resistance of the grinding wheel.

Preferably, the substrate 10 is made of stainless steel. The stainless steel has high hardness, corrosion resistance and long service life.

Furthermore, the width of the V-shaped cutting groove is 1-2CM, and the V-shaped cutting groove 62 is uniformly and annularly arranged on the annular grinding sheet 61. Through the V-shaped cutting groove, the chip removal capacity of the second grinding part 60 is greatly improved.

The first ground portion 50 and the second ground portion 60 are electrically welded to the third step portion 30. The welding connection is simple and convenient.

Preferably, the composition of the first grinding portion 50 and the second grinding portion 60 includes diamond, cubic boron nitride, a resin binder, and copper. The diamond blade is very sharp, and the incorruptibility of cutting edge can improve 1 ~3 times. The cubic boron nitride has high hardness, thermal stability and chemical inertness, and the resin bond grinding wheel has the advantages of good self-sharpening property, difficult blockage, high grinding efficiency, low surface roughness after processing, low grinding temperature and easy trimming. Copper powder is added into the resin bonding agent, and the method is also suitable for electrolytic grinding.

Preferably, the first grinding portion 50 and the second grinding portion 60 have a composition weight ratio of: 5:3:1:1. The four materials are mixed according to the proportion, and the obtained grinding sheet has high temperature resistance, high stability and high grinding efficiency.

Preferably, the resin binder is provided with 20% tin powder. The bonding strength is enhanced, the wear resistance is good, and the consumption of diamond is reduced.

Preferably, a hot pressing process for manufacturing the hot pressed sintered abrasive wheel according to any one of the preceding claims, comprising the steps of: (1) uniformly mixing diamond, cubic boron nitride, resin adhesive and copper which are used as preparation raw materials of a grinding wheel to obtain a mixture;

(2) cold pressing: the matrix 10 is loaded in a mould in advance, the mixed mixture is added into a mould of cold press molding equipment for integral press molding, and finally demoulding is carried out, wherein the cold press pressure is 2.5-3.5T/cm2, the pressure is maintained for 3-5s, and the pressing time is 8-10 s;

(3) hot-pressing and sintering: sintering the cold-pressed and molded crude product in a dry sintering furnace, wherein the heating temperature T =860-880 ℃, the sintering time is 1.5-2h, and nitrogen-hydrogen mixed gas is introduced in the sintering process, and the introduction amount is 0.5-0.8m 3/min;

(4) and (3) cooling: after sintering, removing the finished product, continuously cooling by using the nitrogen-hydrogen mixed gas, introducing the nitrogen-hydrogen mixed gas with the amount of 0.8-1.0 m3/min, and cooling for 2-2.5h to prepare a grinding part;

(5) and then the grinding part and the base body 10 are welded into a whole through a brazing process.

The foregoing description shows and describes several preferred embodiments of the present application, but as aforementioned, it is to be understood that the application is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the application as described herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the application, which is to be protected by the claims appended hereto.