CN113696110B - Device and method for ultrasonically brazing superhard abrasive grinding wheel - Google Patents
Device and method for ultrasonically brazing superhard abrasive grinding wheel Download PDFInfo
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- CN113696110B CN113696110B CN202111005781.XA CN202111005781A CN113696110B CN 113696110 B CN113696110 B CN 113696110B CN 202111005781 A CN202111005781 A CN 202111005781A CN 113696110 B CN113696110 B CN 113696110B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
- B24D18/0054—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for by impressing abrasive powder in a matrix
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
- B24D18/0072—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for using adhesives for bonding abrasive particles or grinding elements to a support, e.g. by gluing
Abstract
The invention relates to a device and a method for ultrasonically brazing a superhard abrasive grinding wheel. When in brazing, the template with abrasive particles is pressed on the working surface of the grinding wheel matrix with brazing filler metal by preset force; an ultrasonic power supply is started to drive the transducer to generate ultrasonic excitation, the amplitude of ultrasonic vibration is amplified through the amplitude transformer and drives the abrasive on the template to generate preset ultrasonic vibration, friction is generated between abrasive particles and a brazing filler metal layer, the brazing filler metal is softened under the action of thermal coupling and is in diffusion connection reaction with the abrasive particles, and the abrasive particles are brazed on the grinding wheel to form an abrasive particle layer. According to the invention, the superhard abrasive is brazed on the grinding wheel base body at a lower temperature, and the consistency of the exposed height of the abrasive particles on the working surface of the obtained brazed grinding wheel is better.
Description
Technical Field
The invention relates to a device and a method for ultrasonically brazing a superhard abrasive grinding wheel. The device is applied to the preparation of the superhard abrasive grinding wheel, and has the characteristics of simple and convenient operation, low brazing temperature, small grinding wheel deformation in the brazing process, capability of brazing the formed grinding wheel with high precision and controllable abrasive exposure height.
Background
The brazing superhard abrasive (diamond or cubic boron nitride) grinding wheel has the advantages of higher sharpness, larger exposed height of the abrasive and larger chip containing space, can arrange abrasive particles according to a certain arrangement rule, is good in heat conductivity and the like, and is more and more widely used in the grinding field. At present, the manufacturing of the brazing superhard abrasive grinding wheel mainly depends on two modes of vacuum high-temperature furnace brazing or high-frequency induction heating brazing, wherein the brazing filler metal and abrasive particles are required to be heated to form a liquid phase, so that the liquid phase and the abrasive particles are subjected to active chemical reaction to form firm brazing (Wuzhi and bin, and the like, "research on Ni-Cr alloy vacuum brazing diamond grinding wheels" (Vol.20No.6), Fu Yu Liang and the like, "a novel superhard abrasive grinding wheel suitable for being introduced and developed domestically" (China mechanical engineering, volume 10, No. 4 1999, 4 months).
Chinese patent authorization document with publication number CN108857940A owned by Henan university of industry discloses a single-layer high-precision brazing superhard abrasive grinding wheel and a manufacturing method thereof, wherein the single-layer high-precision brazing superhard abrasive grinding wheel comprises a metal base body, a plurality of metal insert blocks are bonded on the outer peripheral surface of the metal base body, the metal insert blocks are sequentially spliced to form an annular structure, and an abrasive layer is brazed on the outer peripheral surface of each metal insert block; the manufacturing method comprises the following steps: 1) Manufacturing a female module; 2) processing an inner profile; 3) electroplating or high-temperature glue fixing abrasive particles; 4) manufacturing a metal insert; 5) high-temperature brazing; 6) aligning the reference; 7) bonding a metal substrate; 8) processing a metal matrix; 9) and removing the female die and the electroplated layer or the high-temperature glue layer. The method can effectively reduce the influence of the high-temperature brazing process on the thermal deformation of the grinding wheel matrix, further ensure the manufacturing precision of the grinding wheel, and is favorable for the popularization and application of the single-layer brazing superhard abrasive grinding wheel in the field of precision machining.
A chinese patent authorization document with publication number CN102059660A owned by Nanjing aerospace university discloses a combined brazed super-hard abrasive grinding wheel matrix suitable for ultra-high speed grinding. The combined brazing superhard abrasive grinding wheel base body comprises a bottom plate, a fixed ring, a pressing ring, a cover plate and an insert; a plurality of mounting grooves are uniformly arranged on the outer side wall of the annular groove along the circumferential direction of the bottom plate; an insert block which is integrally T-shaped is arranged in each mounting groove; the fixed ring is arranged in the annular groove in a matched manner and is connected with the bottom plate, and the fixed ring is used for limiting the plurality of inserts; corresponding to each insert, a jacking mechanism for jacking the insert on the outer side wall of the annular groove is connected to the fixing ring; the pressing ring covers the upper parts of all the inserts and is connected with the bottom plate so as to press the inserts; the cover plate is arranged in the central round opening of the pressing ring in a matching mode and connected to the bottom plate, and a part of the cover plate covers the fixing ring. The insert has the advantages of small width of an insert connecting seam, good integrity, reliable working performance, safe structure and suitability for ultra-high-speed grinding.
However, the manufacturing process melts the brazing filler metal into a liquid state at high temperature, and the brazing filler metal and the abrasive particles are subjected to chemical metallurgical reaction near the melting point of the brazing filler metal to braze the abrasive particles, so that the brazing temperature is high, and the thermal deformation of the grinding wheel is large; the solid-phase abrasive particles lack constraint in the brazing process, and floating rolling exists in the liquid-phase brazing filler metal, so that the positions of the abrasive particles are changed. Therefore, the deformation of the final brazing grinding wheel is large, the exposure heights of the abrasive particles on the working surface are inconsistent, and the brazing grinding wheel, especially the formed brazing grinding wheel cannot meet the requirement of precision grinding. In view of the above, there is a need for a device and a method for manufacturing a brazed superabrasive grinding wheel, which is simple in operation and capable of controlling the exposure height of abrasive particles at a lower temperature.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the defects of the existing method and device for brazing the superhard abrasive grinding wheel, the invention provides the device and the method for ultrasonically brazing the superhard abrasive grinding wheel.
The technical scheme is as follows: in order to achieve the purpose, the invention provides a device and a method for ultrasonically brazing a superhard abrasive grinding wheel.
The ultrasonic head of the device for ultrasonically brazing the superhard abrasive grinding wheel comprises a transducer, an amplitude transformer and a template, an abrasive layer and an ultrasonic power supply, wherein the transducer is connected to the power supply, the amplitude transformer is connected to the other end of the transducer, the abrasive layer is connected to the smaller end part of the amplitude transformer, after the power supply outputs energy, the transducer drives the amplitude transformer to vibrate, and the abrasive layer is driven by the amplitude transformer to carry out ultrasonic vibration.
The grinding wheel to be brazed comprises a grinding wheel base body and a brazing filler metal layer on a grinding wheel working surface. The working surface of the grinding wheel matrix with the brazing filler metal for processing can be a plane or a forming surface, and the template and the working surface of the grinding wheel are concave-convex dies.
The energy converter can generate ultrasonic vibration by the power supply of the ultrasonic power supply, and the amplitude of the ultrasonic vibration can be amplified by the amplitude transformer.
Based on the method for ultrasonically brazing the super-hard abrasive grinding wheel by the device,
(1) the structural dimensions of the wheel (e.g., outer diameter, inner diameter, width) and the working face structural dimensions are determined. Determining the grinding wheel base material (such as 45# steel), and machining the grinding wheel base to ensure the roundness and the runout of the grinding wheel base and the shape precision of a working surface of the grinding wheel.
(2) And (3) scattering brazing filler metal on the working surface of the grinding wheel matrix, and heating the brazing filler metal by using a vacuum brazing furnace or high-frequency induction to melt the brazing filler metal and infiltrate the brazing filler metal with the grinding wheel matrix, so that the brazing filler metal is fully spread on the working surface of the grinding wheel to form a brazing filler metal layer. And (4) processing the grinding wheel matrix with the brazing filler metal to ensure the roundness and the run-out of the grinding wheel matrix. And the working surface with the brazing filler metal layer is processed, so that the shape and size precision of the working surface is further ensured.
The grinding wheel matrix with the brazing filler metal layer can be directly obtained in the machining process and continuously machined to replace the machining process.
(3) Uniformly coating a layer of adhesive sticker on a template of the ultrasonic head, and adhering superhard abrasive (diamond or cubic boron nitride) with a preset granularity (for example, 80/100 meshes) on the template according to a preset arrangement rule (for example, close arrangement or phyllotactic arrangement and the like).
(4) Aligning a template on an ultrasonic head with a working surface of a grinding wheel, and pressing an abrasive on a brazing material layer of the grinding wheel with a preset force (for example, 10N); an ultrasonic power supply is started to drive a transducer on an ultrasonic head to generate ultrasonic excitation with preset power (for example, a 300W power supply outputs 20% power), the amplitude of ultrasonic vibration is amplified through an amplitude transformer, abrasive on a template is driven to generate preset ultrasonic vibration (for example, ultrasonic vibration with the frequency of 20kHz and the amplitude of 10 microns), the ultrasonic vibration is kept for a period of time (for example, 10 seconds), friction is generated between abrasive particles and a brazing filler metal layer in the period of time, a certain temperature (for example, 700 ℃) is generated through the ultrasonic vibration of the abrasive particles and the friction heat between the brazing filler metal, the brazing filler metal is softened at the temperature, the abrasive particles and the brazing filler metal are subjected to diffusion connection reaction at the temperature and under the preset pressure, and the abrasive particles are brazed on a grinding wheel to form an abrasive particle layer.
(5) And (3) lifting the ultrasonic head, rotating the grinding wheel (1) by an angle of a template (for example, the template length is 1/10 of the circumference of the grinding wheel, the grinding wheel is rotated by 36 degrees), and repeating the steps (2) and (3) until the working surface of the grinding wheel is brazed with abrasive particles in the circumferential direction to form the complete brazed abrasive particle grinding wheel.
Has the advantages that:
(1) the device for ultrasonically brazing the superhard abrasive grinding wheel utilizes ultrasonic waves to perform diffusion connection on abrasive particles and brazing filler metal, the brazing temperature is low, the influence of brazing heat on a grinding wheel matrix is small, deformation in the brazing process is small, and high-precision grinding wheel manufacturing can be realized.
(2) The working surface of the grinding wheel has no special requirements and can be a plane or a curved surface, so that the formed superhard abrasive grinding wheel can be brazed.
(3) The abrasive grains are adhered to the template by the adhesive and pressed on the brazing filler metal layer at a preset pressure, so that the macro movement of the abrasive grains is restrained, and the equal height of the abrasive grains is more uniform.
Drawings
FIG. 1 is a schematic view of the apparatus of the present invention;
FIG. 2 is a schematic view of a wheel of the present invention to be brazed;
FIG. 3 is a schematic view of the invention showing the distribution of abrasive material on the template
FIG. 4 is a schematic view of an ultrasonic head of the present invention with an abrasive layer;
FIG. 5 is a schematic view of the process of pressing the ultrasonic head of the device of the present invention flush against the working surface of the grinding wheel;
FIG. 6 is a schematic diagram of the inventive ultrasonic brazing superabrasive principle;
FIG. 7 is an infrared thermometry image of an ultrasonic brazing process in an embodiment of the invention;
FIG. 8 is an ultrasonic brazing process temperature profile in an embodiment of the invention;
FIG. 9 is a photograph of a brazing abrasive layer in an embodiment of the invention;
FIG. 10 is a photograph of brazed abrasive particles in an example embodiment of the invention;
FIG. 11 is an SEM photograph of abrasive particles bonded to a braze in an example of the invention;
fig. 12 is a comparison statistical graph of abrasive layer exposure heights in accordance with an example of the invention.
Description of the various reference symbols in the drawings:
1-grinding wheel, 1-1-grinding wheel base body, 1-2-brazing filler metal layer, 2-ultrasonic head, 2-1-transducer, 2-2-amplitude transformer, 2-3-template, 3-abrasive grain, 4-ultrasonic power supply, 5-ultrasonic vibration and 6-diffusion connection reaction area of brazing filler metal and abrasive grain.
Detailed Description
In order to make the technical solutions in the present patent application better understood by those skilled in the art, the technical solutions in the present application will be clearly and completely described below with reference to the accompanying drawings in the present application. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application shall fall within the protection scope of the present application.
Referring to fig. 1 and 2, a grinding wheel 1 to be brazed comprises a grinding wheel base body 1-1 and a brazing filler metal layer 1-2 on a grinding wheel working surface; the brazing filler metal layer is formed by scattering brazing filler metal on the working surface of the grinding wheel matrix 1-1, heating the brazing filler metal to melt the brazing filler metal and infiltrate the brazing filler metal with the grinding wheel matrix 1-1, and fully spreading the brazing filler metal on the working surface of the grinding wheel. An abrasive layer (3) is arranged on the outside of the solder layer by means of the following ultrasonic head.
Referring to fig. 1-4, an ultrasonic head 2 includes a transducer 2-1, a horn 2-2, and a template 2-3, an abrasive layer 3, and an ultrasonic power source 4. Wherein, the transducer is connected to power 4, and the amplitude transformer is connected to the other end of transducer, and template 3 is connected at the less tip of amplitude transformer, and after the power output energy, the transducer drives amplitude transformer and produces ultrasonic vibration, and the abrasive material layer is driven by amplitude transformer and is carried out ultrasonic vibration. In the brazing process, the transducer, the amplitude transformer and the template assembly with the abrasive are pressed into a brazing filler metal layer on the grinding wheel base body with preset force, on one hand, abrasive particles on the template are pressed into the brazing filler metal and are in close contact with the brazing filler metal, on the other hand, the abrasive which is subjected to ultrasonic vibration can generate high-frequency friction with the brazing filler metal, and the friction heat enables the contact area of the abrasive and the brazing filler metal to generate higher temperature so as to provide conditions for diffusion connection.
The method for ultrasonically brazing the superhard abrasive grinding wheel based on the device comprises the following steps:
(1) the structural dimensions of the wheel (e.g., outer diameter, inner diameter, width) and the working face structural dimensions are determined. The grinding wheel base material (e.g. 45# steel) is identified. Processing of the grinding wheel matrix: and (3) processing the grinding wheel matrix 1-1 to ensure the roundness and the runout of the grinding wheel matrix 1-1 and the shape precision of a grinding wheel working surface.
(2) And (3) scattering brazing filler metal on the working surface of the grinding wheel matrix 1-1, and heating the brazing filler metal by using a vacuum brazing furnace or high-frequency induction to melt the brazing filler metal and infiltrate the brazing filler metal with the grinding wheel matrix 1-1, so that the brazing filler metal is fully spread on the working surface of the grinding wheel to form a brazing filler metal layer 1-2. The grinding wheel base body 1-1 with brazing filler metal is processed to ensure roundness and runout, and the working surface with the brazing filler metal layer 1-2 is processed to ensure shape and size accuracy (see figure 2).
(3) A layer of adhesive sticker is uniformly coated on a template 2-3 of an ultrasonic head 2, and superhard grinding materials (diamond or cubic boron nitride) are adhered to the template (2-3) according to a preset arrangement rule (close arrangement or leaf sequence arrangement and the like) (see figures 3 and 4). The template 2-3 on the ultrasonic head 2 is aligned with the working surface of the grinding wheel (see fig. 5), and the abrasive 3 is pressed against the brazing material layer 1-2 of the grinding wheel with a predetermined force (e.g. 10N) so that the abrasive grains 5 are slightly pressed into the brazing material layer 1-2.
(4) An ultrasonic power supply 4 is started to drive a transducer 2-1 on an ultrasonic head 2 to generate ultrasonic excitation, the amplitude of ultrasonic vibration is amplified through an amplitude transformer 2-2 and drives an abrasive 3 on a template to generate preset ultrasonic vibration (such as ultrasonic vibration with the frequency of 20kHz and the amplitude of 10 microns), the ultrasonic vibration is kept for a period of time (such as 10 seconds), friction is generated between the abrasive 3 and a brazing filler metal layer 1-2, the brazing filler metal is softened under the action of thermal coupling, and the abrasive grains are in diffusion connection reaction with the abrasive grains, the abrasive grains are brazed on the grinding wheel to form an abrasive grain layer, friction is generated between the abrasive grains and the brazing filler metal layer during the period, the ultrasonic vibration of the abrasive particles and the frictional heat between the brazing filler metal generate a certain temperature (for example 700 ℃), the brazing filler metal is softened at the temperature, and the abrasive particles and the brazing filler metal are subjected to diffusion bonding reaction at the temperature and under the preset pressure, and the abrasive particles are brazed on the grinding wheel to form an abrasive particle layer. The diffusion bonding is that chemical metallurgical bonding is formed between the abrasive particles and the brazing filler metal, the bonding strength is stronger than the strength of the abrasive particles according to the research surface of high-temperature brazing, the bonding strength of the self-adhesive sticker is very low, and the abrasive particles and the adhesive can be separated by slightly poking the self-adhesive sticker (see figure 6).
(5) And (3) lifting the ultrasonic head 2, rotating the grinding wheel (1) by a certain angle according to the ratio of the length of the template to the circumference of the grinding wheel, so as to meet the requirement of the ultrasonic head on the continuous operation length of the template (for example, the length of the template is 1/10 of the circumference of the grinding wheel, rotating the grinding wheel by 36 degrees), uniformly coating a layer of adhesive sticker on the template 2-3 of the ultrasonic head 2 again, and repeating the steps (3) - (4) until the complete brazing abrasive grain grinding wheel is formed.
Example 1
In the embodiment, the inner diameter of the grinding wheel is 127mm, the outer diameter is 400mm, the width is 10mm, the working surface of the grinding wheel is a plane, and the upper template of the ultrasonic head and the working surface of the grinding wheel are concave-convex moulds. The grinding wheel base body is precisely turned by a lathe, and the roundness, the run-out and the flatness of the working surface of the grinding wheel are all guaranteed to be +/-0.01 mm. At the working surface of the grinding wheel at 0.2g/cm 2 The brazing filler metal on the working surface is heated by a high-frequency induction brazing method to be melted and infiltrated into the matrix, and a brazing filler metal layer is formed by spreading on the matrix. The grinding wheel base body with the brazing filler metal layer is finely turned by a lathe, the roundness and the runout of the base body and the flatness of a working face of the grinding wheel are further guaranteed to be +/-0.01 mm, and meanwhile, the thickness of the brazing filler metal layer is guaranteed to be 0.5 +/-0.1 mm.
The template on the ultrasonic head is 10.5mm wide (slightly wider than the grinding wheel) and 12.56mm long (1/100 being the circumference of the grinding wheel). A layer of uniform and thin adhesive sticker is uniformly coated on the template by a brush, the superhard abrasive is 40/45-mesh cubic boron nitride abrasive grains, and the superhard abrasive grains are obliquely arranged at an angle of 45 degrees and are arranged in each row at a distance of 1.2mm and are adhered to the template in a close arrangement mode.
Moving the ultrasonic head downwards, pressing the abrasive on the template on the brazing filler metal layer with the force of 10N, starting an ultrasonic power supply and adjusting the output power of the power supply to be 150W (outputting the power of 300W power supply with 50 percent), so that the template at the front end of the ultrasonic head generates ultrasonic vibration with the frequency of 20kHz and the amplitude of 10 mu m, and keeping for 10 seconds, so that the brazing filler metal layer generates high temperature under the ultrasonic vibration friction action of abrasive particles (the highest measurement temperature is 750 ℃, and the brazing process and the temperature measurement curve are shown in figures 7 and 8), so that the brazing filler metal is softened and performs diffusion reaction with the abrasive particles under the temperature and pressure action, and the abrasive particles are brazed on the grinding wheel base body to form the abrasive layer (shown in figures 9-11) which is orderly arranged.
And (3) closing the ultrasonic power supply and lifting the ultrasonic head, scattering abrasive particles on the template again, rotating the grinding wheel to a non-brazed area, and repeating the ultrasonic brazing abrasive particle process until the cubic boron nitride abrasive particles are uniformly brazed on the working surface of the grinding wheel to prepare the complete brazed cubic boron nitride forming grinding wheel. In the ultrasonic brazing process, the higher temperature generated by the ultrasonic vibration of the abrasive particles and the friction of the brazing filler metal only exists in the contact area of the abrasive particles and the brazing filler metal, and the rest area is kept at the lower temperature, so that the thermal deformation of the grinding wheel is small. In addition, because the template restrains the macroscopic displacement of the abrasive particles during the brazing process, the abrasive particles do not roll and float in the liquid brazing filler metal during the high-frequency induction brazing process, and the exposed height of the abrasive particles is more consistent, as shown in fig. 12.
In addition, the factors influencing the wheel brazing result in the ultrasonic wheel brazing process are divided into ultrasonic vibration parameters (such as ultrasonic vibration frequency and amplitude), wheel parameters (such as base materials and shape complexity), brazing parameters (such as brazing filler metal components, brazing filler metal layer thickness, abrasive particle types and the like), and process parameters (such as pressure of abrasive particles pressed into a brazing filler metal layer, ultrasonic vibration holding time and the like).
The foregoing description of various embodiments of the present application is provided to those skilled in the art for the purpose of illustration. It is not intended to be exhaustive or to limit the invention to a single disclosed embodiment. As described above, various alternatives or modifications of the present application will be apparent to those skilled in the art to which the above-described technology pertains. Thus, while some alternative embodiments have been discussed in detail, other embodiments will be apparent or relatively easy to derive by those of ordinary skill in the art. This application is intended to cover all alternatives, modifications, and variations of the invention discussed herein, as well as other embodiments, which fall within the spirit and scope of the above-mentioned application.
Although the present application has been described in terms of embodiments, those of ordinary skill in the art will recognize that there are numerous variations and permutations of the present application without departing from the spirit of the application, and it is intended that the appended claims encompass such variations and permutations without departing from the spirit of the application.
Claims (5)
1. The method for ultrasonically brazing the superhard abrasive grinding wheel is characterized by comprising the following steps of:
the adopted device for ultrasonically brazing the superhard abrasive grinding wheel comprises an energy converter, an amplitude transformer, a template and an ultrasonic power supply, wherein the energy converter is connected to the power supply, the other end of the energy converter is connected with the amplitude transformer, the abrasive particle template is connected to the smaller end part of the amplitude transformer, after the power supply outputs energy, the energy converter drives the amplitude transformer to vibrate, an abrasive layer is driven by the amplitude transformer to carry out ultrasonic vibration, and the abrasive and brazing filler metal are pressed into a brazing filler metal layer on a grinding wheel base body under the action of high temperature generated by friction and pressure applied from the outside;
the method comprises the following steps:
processing a grinding wheel base body, scattering brazing filler metal on a working surface of the grinding wheel base body, heating the brazing filler metal to melt the brazing filler metal and infiltrate the brazing filler metal with the grinding wheel base body, fully spreading the brazing filler metal on the working surface of the grinding wheel to form a brazing filler metal layer, and processing the working surface of the grinding wheel base body with the brazing filler metal to ensure the shape and size precision of the grinding wheel base body;
step (2) uniformly coating glue on the template at the end part of the amplitude transformer, and adhering the superhard abrasives to the template (2-3) according to a preset arrangement rule;
step (3) aligning the template with the abrasive particles and the working surface of the grinding wheel matrix with brazing filler metal, and pressing the abrasive materials on the brazing filler metal layer (1-2) of the grinding wheel; an ultrasonic power supply is started to drive an energy converter to generate ultrasonic excitation, the amplitude of ultrasonic vibration is amplified through an amplitude transformer and drives the abrasive on the template to generate ultrasonic vibration, friction is generated between abrasive particles and a brazing filler metal layer, the brazing filler metal is softened under the action of pressure applied by the abrasive particles and the temperature increased by the friction and generates diffusion connection reaction with the abrasive particles, the abrasive particles are brazed on the grinding wheel, an abrasive particle layer is formed, and the exposure heights of the abrasive particles are consistent;
and (4) lifting the ultrasonic head, rotating the grinding wheel (1) by an angle of one template, and repeating the steps (2) and (3) until the grinding wheel working surface is brazed with abrasive particles in the circumferential direction to form the complete brazed abrasive particle grinding wheel.
2. A method of ultrasonically brazing a superabrasive grinding wheel according to claim 1, wherein the working surface of the grinding wheel may be flat or contoured, and the template and the grinding wheel working surface are male and female dies.
3. The method for ultrasonically brazing a superabrasive grinding wheel according to claim 1, wherein in the step (2), the superabrasive is diamond or cubic boron nitride abrasive grains, and the predetermined arrangement rule is a close-packed or phyllotactic arrangement.
4. The method of ultrasonically brazing a superabrasive grinding wheel according to claim 1, wherein the abrasive grains are bonded to the template by a bonding force of the binder, and pressed against the brazing filler metal layer and released from the template at a predetermined pressure, the bonding force being smaller than a bonding force of the abrasive grains to the brazing filler metal layer.
5. The method for ultrasonically brazing a superabrasive grinding wheel according to claim 1, wherein in the step (3), the temperature of heat generation between the abrasive grains and the filler metal due to friction caused by ultrasonic vibration does not exceed 750 ℃, and is lower than the melting point of the filler metal.
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| CN105414800B (en) * | 2016-01-11 | 2017-10-27 | 苏州科技大学 | High-frequency induction heating ultrasonic vibration aids in mono-layer diamond brazed abrasive wheel preparation method |
| CN105479025B (en) * | 2016-01-21 | 2018-01-16 | 长沙理工大学 | A kind of method of ultrasonic wave added laser brazed diamond tool |
| CN105855655B (en) * | 2016-05-27 | 2018-10-16 | 华侨大学 | The heating of ultrasonic wave auxiliary induction prepares the application method of the device of soldering millgrain tool |
| CN105856088B (en) * | 2016-05-27 | 2019-01-25 | 华侨大学 | A kind of preparation facilities and its method of abrasive grain three-dimensional controllable arrangement grinding tool |
| CN205764315U (en) * | 2016-05-27 | 2016-12-07 | 华侨大学 | A kind of ultrasonic assistant sensing preheating laser braze welding prepares the device of abrasive particle grinding wheel |
| CN106041768B (en) * | 2016-05-27 | 2018-05-25 | 华侨大学 | A kind of method that ultrasonic wave auxiliary activity connection prepares super-hard abrasive particle tool |
| CN108818337B (en) * | 2018-07-05 | 2020-02-14 | 南京航空航天大学 | Abrasive grain arrangement design and implementation method of single-layer brazing CBN (cubic boron nitride) grinding wheel for forming grinding |
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