阅读说明：本技术 一种修整砂轮用超硬工具及其制备方法 (Superhard tool for dressing grinding wheel and preparation method thereof ) 是由 段斌虎 于 2019-10-23 设计创作，主要内容包括：本发明公开了一种修整砂轮用超硬工具及其制备方法,其中的修整砂轮用超硬工具包括：磨头载体,所述磨头载体包括圆形的本体部,所述本体部的中部形成有贯穿所述本体部的安装轴孔,所述本体部的周围形成一圈凸出于所述本体部的修整端部；若干沿周向均匀贴装于所述修整端部上的长条状的修整磨头,各所述修整磨头的修整端面处于同一平面上。本发明省掉了传统烧结方式制造修整砂轮用超硬工具所需的石墨模具、模具配件和整套模具的装配工作,提高了生产效率,同时节能环保；本发明通过钎焊焊接的方式来固定修整材料,修整材料可以露出更多,相对传统修整砂轮用超硬工具本发明更锋利、寿命更长,同时具有牢固、稳定的优点。(the invention discloses a superhard tool for dressing a grinding wheel and a preparation method thereof, wherein the superhard tool for dressing the grinding wheel comprises: the grinding head carrier comprises a circular main body part, a mounting shaft hole penetrating through the main body part is formed in the middle of the main body part, and a circle of trimming end part protruding out of the main body part is formed around the main body part; and the trimming end faces of the trimming grinding heads are positioned on the same plane. The invention saves the assembly work of a graphite die, a die accessory and a whole set of die required by the traditional sintering method for manufacturing the superhard tool for trimming the grinding wheel, improves the production efficiency, and simultaneously saves energy and protects environment; the invention fixes the trimming material in a brazing welding mode, the trimming material can be exposed more, and compared with the traditional superhard tool for trimming the grinding wheel, the invention has the advantages of sharper performance, longer service life, firmness and stability.)

1. A superhard tool for dressing a grinding wheel, comprising:

the grinding head carrier comprises a circular main body part, a mounting shaft hole penetrating through the main body part is formed in the middle of the main body part, and a circle of trimming end part protruding out of the main body part is formed around the main body part;

and the trimming end faces of the trimming grinding heads are positioned on the same plane.

2. A superhard tool for dressing a grinding wheel according to claim 1, wherein each of the dressing abrasive heads is inclined in the same direction, the angle between each of the dressing abrasive heads and the outer circumference of the abrasive head carrier being equal.

3. A superhard tool for dressing a grinding wheel according to claim 2, wherein the angle between each of the dressing abrasive heads and the outer periphery of the abrasive head carrier is in the range of 15 ° to 75 °.

4. A superhard tool for dressing a grinding wheel according to claim 1, wherein the dressing head is brazed to the dressing tip via a braze paste.

5. a superhard tool for dressing a grinding wheel according to claim 1, wherein the dressing head is sintered to the dressing end portion by powder metallurgy.

6. A superhard tool for dressing a grinding wheel according to claim 1, wherein the dressing abrasive head is formed by chemical vapour deposition diamond machining.

7. A superhard tool for dressing a grinding wheel according to claim 1, wherein the dressing head has a chamfer formed at a periphery of the dressing end face thereof, the chamfer being formed by grinding to be dulled.

8. A method for preparing a superhard tool for dressing a grinding wheel is characterized by comprising the following steps:

Forming a grinding head carrier through machining;

Marking a plurality of mounting position reference lines which are in one-to-one correspondence with a plurality of finishing grinding heads to be mounted on the finishing end part of the grinding head carrier along the circumferential direction;

bonding a plurality of finishing grinding heads on the finishing end part of the grinding head carrier by adopting brazing paste by taking the plurality of reference lines as a reference;

Placing the grinding head carrier bonded with the finishing grinding head into an oven for baking, and taking out the grinding head carrier after the soldering paste is solidified;

Placing the grinding head carrier into a vacuum brazing furnace for brazing to obtain the superhard tool for dressing the grinding wheel;

The dressing end faces of the respective dressing grinding heads are subjected to rotational grinding so that the dressing end faces of the respective dressing grinding heads are on the same plane.

9. A method of manufacturing a superhard tool for dressing a grinding wheel according to claim 8, further comprising, after the completion of the rotational grinding of the dressing end face of each dressing grinding head: the periphery of the dressing end face of each dressing grinding head is subjected to grinding and passivating to form a chamfer.

Technical Field

The invention relates to the technical field of grinding wheel dressing tools, in particular to a superhard tool for dressing a grinding wheel and a preparation method thereof.

Background

In the grinding process of the grinding wheel, the self-sharpening performance of the grinding wheel can only keep good grinding effect within a certain time, and in order to prevent the self-sharpening performance of the grinding wheel from deteriorating or the geometric structure from being misaligned, the grinding wheel must be periodically dressed by using super-hard wear-resistant materials so as to keep the sharp and accurate geometric structure of the grinding wheel.

As shown in fig. 1, the existing superhard tool for dressing a grinding wheel comprises a metal carrier 1.1, wherein powder metallurgy 1.2 with a certain thickness is sintered on the excircle of the metal carrier 1.1 at a high temperature; the end face of the powder metallurgy is embedded with a finishing grinding head 1.3.

As shown in fig. 2, the superhard tool sintering device for dressing the grinding wheel adopts graphite materials which cause serious pollution to the nature and the production environment as a mold, and has complex assembly process and high cost; the superhard tool sintering device for trimming the grinding wheel comprises a metal carrier 3.1, a graphite core rod 3.2, metal powder 3.3, a graphite pressure head 3.4 for presetting superhard materials, a graphite shell 3.5, a heat-insulating asbestos sheet 3.6 and an anti-cracking metal shell 3.7; in order to fix the superhard material in the sintering process, the wrapping amount of the superhard material by powder metallurgy is required to be more than 60% of the volume of the superhard material, and the utilization rate of the superhard material is low.

Disclosure of Invention

In order to solve the problems, the invention provides a superhard tool for trimming a grinding wheel, which has the advantages of simple structure, high manufacturing efficiency, low processing energy consumption, high utilization rate of superhard materials, energy conservation and environmental protection.

the invention provides a specific technical scheme of a superhard tool for dressing a grinding wheel, which comprises the following steps:

A superhard tool for dressing a grinding wheel, comprising:

The grinding head carrier comprises a circular main body part, a mounting shaft hole penetrating through the main body part is formed in the middle of the main body part, and a circle of trimming end part protruding out of the main body part is formed around the main body part;

and the trimming end faces of the trimming grinding heads are positioned on the same plane.

furthermore, the finishing grinding heads are inclined in the same direction, and included angles between the finishing grinding heads and the outer circumference of the grinding head carrier are equal.

furthermore, the included angle between each finishing grinding head and the outer circumference of the grinding head carrier is 15-75 degrees.

Further, the dressing grinding head is brazed on the dressing end through brazing paste.

further, the dressing grinding head is sintered on the dressing end portion through powder metallurgy.

Further, the dressing grinding head is formed by chemical vapor deposition diamond machining.

further, a chamfer is formed at the periphery of the dressing end face of the dressing grinding head.

A second aspect of the invention provides a method of making a superhard tool for dressing a grinding wheel, comprising the steps of:

Forming a grinding head carrier through machining;

Marking a plurality of mounting position reference lines which are in one-to-one correspondence with a plurality of finishing grinding heads to be mounted on the finishing end part of the grinding head carrier along the circumferential direction;

Bonding a plurality of finishing grinding heads on the finishing end part of the grinding head carrier by adopting brazing paste by taking the plurality of reference lines as a reference;

placing the grinding head carrier bonded with the finishing grinding head into an oven for baking, and taking out the grinding head carrier after the soldering paste is solidified;

Placing the grinding head carrier into a vacuum brazing furnace for brazing to obtain the superhard tool for dressing the grinding wheel;

The dressing end faces of the respective dressing grinding heads are subjected to rotational grinding so that the dressing end faces of the respective dressing grinding heads are on the same plane.

Further, after the finish end face of each of the finishing grinding heads is finished by the rotational grinding, the method further comprises: the periphery of the dressing end face of each dressing grinding head is subjected to grinding and passivating to form a chamfer.

the superhard tool for dressing the grinding wheel has the following beneficial effects:

1. The graphite die, die accessories and the whole die assembly required by the traditional sintering method for manufacturing the superhard tool for dressing the grinding wheel are omitted, the production efficiency is improved, and meanwhile, the energy is saved and the environment is protected.

2. The invention fixes the trimming grinding head in a brazing welding mode, the trimming grinding head can be exposed more, and compared with the traditional grinding wheel trimming tool, the invention has the advantages of sharper quality, longer service life, firmness and stability.

Drawings

FIG. 1 is a schematic view of a prior art superhard tool for dressing a grinding wheel;

FIG. 2 is a schematic structural view of a superhard tool sintering apparatus for dressing a grinding wheel;

FIG. 3 is a schematic view of a superhard dressing tool for a grinding wheel according to a first embodiment of the invention;

figure 4 is an enlarged fragmentary view of a superhard tool for dressing a grinding wheel according to a first embodiment of the invention;

figure 5 is a partial cross-sectional view of a superhard tool for dressing a grinding wheel according to a first embodiment of the invention;

FIG. 6 is a view showing a state of use of the superhard dressing tool for the grinding wheel according to the first embodiment of the present invention;

FIG. 7 is a schematic view of a superhard dressing tool for a grinding wheel according to a second embodiment of the invention;

figure 8 is an enlarged fragmentary view of a superhard tool for dressing a grinding wheel according to a second embodiment of the invention;

Figure 9 is a partial cross-sectional view of a superhard tool for dressing a grinding wheel according to a second embodiment of the invention.

Detailed Description

In order that the objects and advantages of the invention will be more clearly understood, the invention is further described in detail below with reference to examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

First embodiment

As shown in fig. 3 to 5, the first embodiment provides a superhard tool 100 for dressing a grinding wheel, comprising a grinding head carrier 110 of a metal material and a plurality of dressing grinding heads 120 provided on the grinding head carrier 110, wherein:

The grinding wheel head carrier 110 comprises a circular main body 111, a mounting shaft hole 112 penetrating through the main body 111 is formed in the middle of the main body 111, a circle of trimming end 113 protruding out of the main body 111 is formed around the main body 111, and a plurality of material pits corresponding to a plurality of trimming grinding wheel heads 120 are formed on the trimming end 113 along the circumferential direction.

the dressing grinding heads 120 are made of natural diamond, and each dressing grinding head 120 is brazed in a corresponding material pit through brazing paste. The shape of the material pit is V-shaped or U-shaped.

the superhard tool 100 for dressing a grinding wheel in the present embodiment is prepared as follows: the grinding head carrier 110 is formed by machining, a plurality of material pits corresponding to the plurality of grinding heads one by one are machined on the trimming end part of the grinding head carrier 110 along the circumferential direction, and the grinding heads are brazed in the material pits one by adopting brazing paste.

The superhard tool 100 for dressing the grinding wheel provided by the embodiment of the invention saves the assembly work of a graphite die, a die accessory and a whole set of die required by the traditional sintering method for manufacturing the superhard tool for dressing the grinding wheel, improves the production efficiency, and is energy-saving and environment-friendly; in addition, it fixes the bistrique carrier through the mode of brazing welding, and the bistrique carrier can expose more, and is compared traditional emery wheel finishing tool, and it is sharper, the life-span is longer, has firm, stable advantage simultaneously.

Referring to fig. 6, a schematic view of the use of the superhard dressing tool 100 for dressing a grinding wheel according to the present embodiment is shown.

as shown in fig. 6, the method of using the superhard dressing tool 100 for the dresser wheel in the present embodiment is as follows:

The superhard tool 100 for dressing a grinding wheel is mounted on the first rotary shaft 400 through the mounting shaft hole 112, while the grinding wheel 300 to be dressed is mounted on the second rotary shaft 500.

the relative positions of the first rotating shaft 400 and the second rotating shaft 500 are adjusted so that the dressing wheel head 120 of the superhard tool for dressing grinding wheel 100 is in contact with the outer circumference of the grinding wheel 300 to be dressed.

the first rotating shaft 400 and the second rotating shaft 500 are controlled to drive the superhard tool 100 for dressing the grinding wheel and the grinding wheel 300 to be dressed to rotate, so that the dressing grinding head 120 of the superhard tool 100 for dressing the grinding wheel can modify the grinding wheel 300 to be dressed.

Second embodiment

The superhard tool 100 for dressing a grinding wheel of the first embodiment has the following problems: 1. the shape and size of the natural diamond have great difference, and even though the natural diamond is ground, the grinding end face of the formed finishing grinding head 120 has the defects of unevenness and different sizes, so that the overall working performance of the superhard tool 100 for finishing the grinding wheel is reduced; 2. a material pit must be processed to fix the finishing grinding head 120, which increases the process difficulty and the processing cost; 3. the finishing grinding heads 120 with different sizes and shapes are difficult to completely attach to the material pits with uniform specifications, and the false welding is easy to occur in the brazing process, so that the finishing grinding heads 120 are easy to fall off in the use process

In view of the above, the second embodiment of the present invention further provides a superhard tool 200 for dressing a grinding wheel.

As shown in fig. 7 to 9, a superhard tool 200 for dressing a grinding wheel according to a second embodiment includes a grinding-head carrier 210 made of a metal material and a plurality of elongated dressing grinding heads 220 attached to the grinding-head carrier 210. Wherein: the grinding stone carrier 210 includes a circular body part 211, a mounting shaft hole 212 penetrating the body part 211 is formed at the center of the body part 211, and a round of finishing end 213 protruding from the body part 211 is formed around the body part 211. A plurality of dressing grinding stones 220 are uniformly attached to the dressing end portion 213 in the circumferential direction, and the dressing end faces of the dressing grinding stones 220 are on the same plane.

in this embodiment, the dressing grinding head 220 is formed by Chemical Vapor Deposition (CVD) diamond processing, and in the specific embodiment, chemical vapor deposition single crystal diamond or chemical vapor deposition polycrystalline diamond may be selected. Unlike natural diamond, chemical vapor deposition diamond is formed by chemical vapor deposition and is easily processed into elongated dressing grinding heads 220 having standard shapes and sizes, thereby ensuring that the dressing end faces of the respective dressing grinding heads 220 are on the same working plane.

As shown in fig. 9, the dressing grinding head 220 is brazed to the dressing end 213 via the brazing paste 230. Unlike natural diamond, the elongated dressing grinding head 220 can be completely attached to the dressing end 213 during brazing, thereby preventing a cold joint phenomenon and ensuring the connection strength between the dressing grinding head 220 and the dressing end 213. Of course, the dressing grinding head 220 may be sintered on the dressing end 213 through powder metallurgy.

Alternatively, as shown in fig. 8, the respective finishing grinding wheels 220 are inclined in the same direction, and the angles α between the respective finishing grinding wheels 220 and the outer circumference of the grinding wheel carrier 210 (i.e., the angles of the dotted lines M and N shown in fig. 8) are equal. With this arrangement, the dressing sharpness of the superhard grinding tool 200 for dressing a grinding wheel can be improved, and the dressing grinding head 220 can be reduced in wear. Optionally, the angle value of the included angle α is 15 ° to 75 °.