CN111660212B - Hot-pressed sintering grinding wheel and process thereof - Google Patents

Hot-pressed sintering grinding wheel and process thereof Download PDF

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Publication number
CN111660212B
CN111660212B CN202010624884.3A CN202010624884A CN111660212B CN 111660212 B CN111660212 B CN 111660212B CN 202010624884 A CN202010624884 A CN 202010624884A CN 111660212 B CN111660212 B CN 111660212B
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China
Prior art keywords
grinding
step part
sintering
base body
grinding part
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Application number
CN202010624884.3A
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Chinese (zh)
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CN111660212A (en
Inventor
陈超
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Jiangsu Chaofeng Tools Co ltd
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Jiangsu Chaofeng Tools Co ltd
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Priority to CN202010624884.3A priority Critical patent/CN111660212B/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24DTOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D5/00Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
    • B24D5/06Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor with inserted abrasive blocks, e.g. segmental
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24DTOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D18/00Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
    • B24D18/0009Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for using moulds or presses
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24DTOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D18/00Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
    • B24D18/009Tools not otherwise provided for
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24DTOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/02Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24DTOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/34Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties
    • B24D3/342Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties incorporated in the bonding agent
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24DTOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D5/00Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

The invention discloses a hot-pressed sintering 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 provided in the first stepped portion; 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 a hexagonal grinding sheet which is uniformly arranged, and the hexagonal grinding sheet is provided with a corrugated part; the second grinding part is annularly arranged outside the first grinding part, the second grinding part is an annular grinding piece, and the annular grinding piece is provided with a V-shaped cutting groove. According to the invention, the hexagonal grinding piece is arranged on the first grinding part and the annular grinding piece 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.

Description

Hot-pressed sintering grinding wheel and process thereof
Technical Field
The invention relates to the field of metal grinding, in particular to a hot-pressed sintered grinding wheel and a process thereof.
Background
It is known that grinding wheels are commonly used in the grinding process, but the existing grinding wheels generally comprise a base body and grinding sheets distributed on the circumference of the base body, radial grooves distributed along the circumference of the base body are formed in the grinding sheets to divide the grinding sheets into a plurality of grinding surfaces, and the existing structure can be used for grinding, but on one hand, grinding scraps generated in the grinding process are difficult to remove due to the fact that the structural design is single, so that the grinding precision and the service life are influenced.
Disclosure of Invention
The invention mainly aims to provide the hexagonal grinding piece arranged on the first grinding part and the annular grinding piece 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. In addition, the design of the V-shaped groove improves the grinding speed, so that the grinding efficiency is improved, and the use effect is better.
In order to solve the technical problems, the invention discloses a hot-pressed sintering 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 provided in the first stepped portion; 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 a hexagonal grinding sheet which is uniformly arranged, and the hexagonal grinding sheet is provided with a corrugated part; the second grinding part is annularly arranged outside the first grinding part, the second grinding part is an annular grinding piece, and the annular grinding piece is provided with a V-shaped cutting groove.
According to an embodiment of the present invention, the hexagonal abrasive chips are 6 groups, and the diamond chip 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 groove is 1-2cm, and the V-shaped groove is uniformly and annularly arranged on the annular grinding piece.
According to an embodiment of the present invention, the first grinding portion and the second grinding portion are electrically connected to the third step portion.
According to an embodiment of the present invention, the composition of the first grinding section and the second grinding section 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 part and the second grinding part is: 5:3:1:1
According to an embodiment of the present invention, the resin binder is provided with 20% tin powder.
A hot pressing process for processing the hot pressed sintered grinding wheel as claimed in any one of the preceding claims, comprising the steps of: (1) Uniformly mixing diamond, cubic boron nitride, a resin binder and copper serving as preparation raw materials of the grinding wheel to obtain a mixture;
(2) Cold pressing: a matrix is arranged in a mould in advance, the mixed mixture is added into the mould of cold press molding equipment to be integrally pressed and molded, and finally, the demoulding is carried out, the cold press pressure is 2.5-3.5T/cm < 2 >, the pressure is maintained for 3-5s, and the pressing time is 8-10s;
(3) Hot pressing and sintering: sintering the cold-pressed crude product by a dry sintering furnace, wherein the heating temperature T=860-880 ℃ and the sintering time are 1.5-2h, and introducing nitrogen-hydrogen mixed gas in the sintering process, wherein the introducing amount is 0.5-0.8m < 3 >/min;
(4) And (3) cooling: after sintering, removing the finished product, continuously cooling by nitrogen-hydrogen mixture, and cooling for 2-2.5h at the inlet of 0.8-1.0 m < 3 >/min to prepare a grinding part;
(5) And welding the grinding part and the matrix into a whole through a brazing process.
Compared with the prior art, the application can obtain the following technical effects:
1) Through setting up hexagonal formula grinding piece and set up annular grinding piece at second grinding portion at first grinding portion, improved chip removal ability greatly for the chip removal is smooth, has further improved the precision and the life of grinding, has guaranteed that the emery wheel is durable. In addition, the design of the V-shaped groove improves the grinding speed, 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 specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
fig. 1 is a top view of a hot pressed sintered grinding wheel according to an embodiment of the application.
Reference numerals
The base body 10, the first step part 20, the circular mounting hole 21, the second step part 30, the diamond-shaped chip removing hole 31, the third step part 40, the first grinding part 50, the hexagonal grinding chip 51, the corrugated part 52, the second grinding part 60, the annular grinding chip 61 and the V-shaped cutting groove 62.
Detailed Description
The following detailed description of embodiments of the present application will be given with reference to the accompanying drawings and examples, by which the implementation process of how the present application can be applied to solve the technical problems and achieve the technical effects can be fully understood and implemented.
Referring to fig. 1, fig. 1 is a top view of a hot pressed sintered grinding wheel according to an embodiment of the application. As shown in the figure, a hot pressed sintered grinding wheel comprises a base body 10, wherein the base body 10 is circular, the base body 10 is provided with a step part, and the step part comprises a first step part 20, a second step part 30 and a third step part 40; a circular mounting hole 21 provided in the first stepped portion 20; the diamond chip removal holes 31 are annularly arranged at the top of the second step part 30, and the top of the second step part 30 is arc-shaped; the first grinding part 50 is annularly arranged on the third step part 40, the first grinding part 50 is provided with uniformly arranged hexagonal grinding pieces 51, and the hexagonal grinding pieces 51 are provided with corrugated parts 52; the second grinding part 60 is annularly arranged outside the first grinding part 50, the second grinding part 60 is an annular grinding piece 61, and the annular grinding piece 61 is provided with a V-shaped cutting groove 62.
In the embodiment of the invention, the round matrix 10 is used by workers, so that the hand feeling is better, and the grinding is smoother. The base body 10 is arranged in a stepped shape, so that the heat dissipation area is increased, and the chip removal accommodating area is also increased. The grinding wheel is installed on the machine through the installation hole of the first step part 20, and grinding processing is carried out, so that the grinding machine is simple and convenient; not only increases the holding area of dust and dust through the arc-shaped top of the second step part 30, but also discharges the garbage rapidly through the diamond-shaped chip discharging holes 31, and the diamond-shaped chip discharging holes 31 also play a role of reducing the weight of the substrate 10, thereby reducing the burden of workers. By providing the hexagonal grinding plate 51 on the first grinding portion 50 and providing the corrugated portion 52 on the surface of the hexagonal grinding plate 51, the garbage is rapidly discharged through the corrugated portion 52, and then the cutting groove is formed by the unique hexagonal shape, so that the chip removal efficiency is increased. The grinding precision and the service life of the grinding wheel are further improved by firstly grinding the first grinding part 50 and then using the second grinding part 60, the durability of the grinding wheel is guaranteed, the grinding speed is improved by the design of the V-shaped groove, and therefore the grinding efficiency is improved.
Preferably, the hexagonal abrasive chips 51 are 6 sets and the diamond chip holes 31 are 5 sets. Through multiple tests, the effect is good.
Further, the first grinding portion 50 is higher than the second grinding portion 60. The first grinding part 50 is used for grinding objects, so that a user can conveniently see the abrasion condition of the grinding disc, and the second grinding part 60 is used for enhancing the abrasion resistance of the grinding wheel.
Preferably, the substrate 10 is stainless steel. Stainless steel has high hardness, corrosion resistance and long service life.
Further, the V-shaped cutting groove has a width of 1-2CM, and the V-shaped cutting groove 62 is uniformly provided around the annular grinding piece 61. Through the V-shaped cutting groove, the chip removal capacity of the second grinding part 60 is greatly improved.
The first grinding portion 50 and the second grinding portion 60 are electrically connected 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 cutting edge is very sharp, and the durability of the cutting edge can be improved by 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 bond, and the resin bond is also suitable for electrolytic grinding.
Preferably, the ratio of the weight of the composition of the first grinding section 50 and the second grinding section 60 is: 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 machining a hot pressed sintered grinding wheel as claimed in any one of the preceding claims, comprising the steps of: (1) Uniformly mixing diamond, cubic boron nitride, a resin binder and copper serving as preparation raw materials of the grinding wheel to obtain a mixture;
(2) Cold pressing: a matrix 10 is arranged in a mould in advance, the mixed mixture is added into the mould of cold press molding equipment to be integrally pressed and molded, and finally, the demoulding is carried out, the cold press pressure is 2.5-3.5T/cm < 2 >, the pressure is maintained for 3-5s, and the pressing time is 8-10s;
(3) Hot pressing and sintering: sintering the cold-pressed crude product by a dry sintering furnace, wherein the heating temperature T=860-880 ℃ and the sintering time are 1.5-2h, and introducing nitrogen-hydrogen mixed gas in the sintering process, wherein the introducing amount is 0.5-0.8m < 3 >/min;
(4) And (3) cooling: after sintering, removing the finished product, continuously cooling by nitrogen-hydrogen mixture, and cooling for 2-2.5h at the inlet of 0.8-1.0 m < 3 >/min to prepare a grinding part;
(5) The grinding part and the base body 10 are welded together by a brazing process.
While the foregoing description illustrates and describes the preferred embodiments of the present application, it is to be understood that the application is not limited to the forms disclosed herein, but is not to be construed as limited to other embodiments, and is capable of numerous other combinations, modifications and environments and is capable of changes or modifications within the scope of the inventive concept as expressed herein, either as a result of the foregoing teachings or as a result of the knowledge or technology of the relevant art. And that modifications and variations which do not depart from the spirit and scope of the application are intended to be within the scope of the appended claims.

Claims (2)

1. The hot-pressed sintering grinding wheel is characterized by comprising a base body, wherein the base body is made of stainless steel, the base body is round, 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 provided in the first stepped portion;
The diamond chip removal holes are annularly arranged at the top of the second step part, 5 groups of the diamond chip removal holes are arranged, and the top of the second step part is arc-shaped;
the first grinding part is arranged around the third step part, the first grinding part is formed by uniformly arranged hexagonal grinding sheets, the number of the hexagonal grinding sheets is 6, and the hexagonal grinding sheets are provided with corrugated parts;
The second grinding part is arranged outside the first grinding part in a surrounding mode, the first grinding part is higher than the second grinding part, the first grinding part, the second grinding part and the third step part are connected in an electric welding mode, the second grinding part is an annular grinding piece, the composition of the first grinding part and the second grinding part comprises diamond, cubic boron nitride, a resin adhesive and copper, the resin adhesive is provided with 20% tin powder, and the weight ratio of the composition of the first grinding part to the composition of the second grinding part is as follows: 5:3:1:1, the annular grinding piece is provided with a V-shaped cutting groove, the width of the V-shaped cutting groove is 1-2CM, and the V-shaped cutting groove is uniformly and annularly arranged on the annular grinding piece.
2. The hot pressing process of the hot pressed sintered grinding wheel according to claim 1, characterized in that the manufacturing step is: (1) Uniformly mixing diamond, cubic boron nitride, a resin binder and copper serving as preparation raw materials of the grinding wheel to obtain a mixture;
(2) Cold pressing: a matrix is arranged in a mould in advance, the mixed mixture is added into the mould of cold press molding equipment to be integrally pressed and molded, and finally, the demoulding is carried out, the cold press pressure is 2.5-3.5T/cm < 2 >, the pressure is maintained for 3-5s, and the pressing time is 8-10s;
(3) Hot pressing and sintering: sintering the cold-pressed crude product by a dry sintering furnace, wherein the heating temperature T=860-880 ℃ and the sintering time are 1.5-2h, and introducing nitrogen-hydrogen mixed gas in the sintering process, wherein the introducing amount is 0.5-0.8m < 3 >/min;
(4) And (3) cooling: after sintering, removing the finished product, continuously cooling by nitrogen-hydrogen mixture, and cooling for 2-2.5h at the inlet of 0.8-1.0 m < 3 >/min to prepare the grinding part;
(5) And welding the grinding part and the matrix into a whole through a brazing process.
CN202010624884.3A 2020-07-02 2020-07-02 Hot-pressed sintering grinding wheel and process thereof Active CN111660212B (en)

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Application Number Priority Date Filing Date Title
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CN111660212B true CN111660212B (en) 2024-08-20

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CN103692363A (en) * 2014-01-07 2014-04-02 苏州赛力精密工具有限公司 Super-abrasive grinding wheel used for machining heterogeneous metal component
CN208483733U (en) * 2018-06-06 2019-02-12 佛山市小鲨鱼工具有限公司 New type resin emery wheel
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