A diamond grinding wheel based on composite coating and bionic bird feather structure and preparation method thereof

Abstract

The present invention discloses a diamond grinding wheel based on a composite coating and a bionic bird feather structure and a preparation method thereof, the method comprising: S1, machining a bionic bird feather structure on the surface of a diamond grinding wheel substrate; S2, arranging a Cr coating on the surface of a diamond grinding wheel substrate; S3, arranging a MoS2 coating on the Cr coating; S4, arranging a TiN coating on the MoS2 coating. The chip removal ability of the diamond grinding wheel prepared by the above method is significantly enhanced, the friction between the grinding wheel surface and the debris during the processing is reduced, the grinding temperature and ineffective wear during the grinding process are reduced, the workpiece material is removed uniformly, and the hardness, strength, wear resistance, heat dissipation and oxidation corrosion resistance of the grinding wheel are enhanced, and the service life and grinding efficiency of the grinding wheel are improved.

Description

Technical Field

[0001] The invention relates to the field of grinding wheel finishing, and in particular to a diamond grinding wheel based on a composite coating and a bionic bird feather structure and a preparation method thereof. Background Art

[0002] Diamond grinding wheels are widely used in metal processing, glass processing, ceramic processing and other fields due to their excellent properties such as high hardness, high wear resistance and high thermal conductivity. With the continuous improvement of my country's scientific and technological development level, the gradual acceleration of the transformation and upgrading of the manufacturing industry and the continuous advancement of ultra-precision grinding technology, the performance requirements for diamond grinding wheels are also constantly increasing.

[0003] A large amount of debris generated by the diamond grinding wheel during the processing will enter the gap of the grinding wheel, causing the following problems: ① The grinding wheel is severely passivated, which weakens the cutting ability of the abrasive and leads to reduced grinding efficiency; ② The surface of the grinding wheel is uneven, which increases the surface roughness of the workpiece during the grinding process and reduces the processing accuracy; ③ The cutting force of the grinding wheel is unevenly distributed, causing defects such as deformation or cracks in the workpiece during the processing, affecting the stability of the processing quality; ④ The grinding heat generated during high-speed grinding cannot be dissipated in time, and the increase in the temperature of the grinding wheel aggravates the wear, resulting in thermal damage, shortening the service life of the diamond grinding wheel, and increasing production costs.

[0004] In order to solve the above problems, the industry currently mainly adopts manual cleaning methods, using diamond rollers to dress the grinding wheel to remove blockages, restore the grinding wheel's cutting ability and surface flatness, and regularly clean the grinding chips and powder on the grinding wheel surface to keep the grinding wheel surface clean and smooth and reduce the possibility of gap blockage. Frequent cleaning operations not only consume a lot of manpower and material resources, but also seriously affect production fluency.

[0005] Therefore, when facing the problem of diamond grinding wheel affecting processing efficiency and quality due to gap clogging, we need to find more appropriate measures to prevent and solve it, improve grinding performance, reduce abrasive wear and reduce grinding thermal damage. Summary of the invention

[0006] In view of this, the present invention aims to provide a diamond grinding wheel with rapid chip removal capability and high wear resistance and a preparation method thereof, thereby solving the problems of low processing efficiency, unstable processing quality and short service life of current diamond grinding wheel products due to chip clogging.

[0007] The technical solution of the present invention is:

[0008] A method for preparing a diamond grinding wheel based on a composite coating and a bionic bird feather structure comprises the following steps:

[0009] S1, machining bionic bird feather structure on the surface of diamond grinding wheel substrate;

[0010] S2, setting a Cr coating on the surface of the diamond grinding wheel substrate;

[0011] S3. MoS on Cr coating 2 coating;

[0012] S4, in MoS 2 A TiN coating is provided on the coating.

[0013] In some embodiments, the process of machining a bionic bird feather structure on the surface of a diamond wheel substrate in step S1 includes: inputting a drawing of the desired bird feather structure into a laser system, setting laser machining parameters, and ablating grooves of corresponding depth and width on the surface of the diamond wheel by laser to form a bird feather structure.

[0014] In some embodiments, the process of machining the bionic bird feather structure on the surface of the diamond grinding wheel substrate in step S1 further includes: grinding and polishing the surface of the diamond grinding wheel substrate after laser machining to a mirror surface, and ultrasonically cleaning it in anhydrous ethanol.

[0015] In some embodiments, the process of setting a Cr coating on the surface of the diamond grinding wheel substrate in step S2 includes: using a Hall ion source to glow clean the diamond grinding wheel substrate to remove oxides and impurities on the surface, and turning on a DC magnetron power supply to deposit a Cr coating on the surface of the diamond grinding wheel substrate.

[0016] In some embodiments, the step S3 provides a MoS coating on the Cr coating. 2 The coating process includes: 2 The target material is placed in the working room of the ion plating machine, the working room is evacuated to a vacuum environment, the target material is heated, argon gas is introduced, and the RF magnetron sputtering method is used to deposit MoS on the surface of the Cr coating. 2 coating.

[0017] In some embodiments, the step S4 is carried out in MoS 2 The process of setting the TiN coating on the coating includes: placing a TiN target material with a purity of 99.99% in the working room of the ion plating machine, exhausting the working room to a vacuum environment, heating the target material, introducing argon gas, and using radio frequency magnetron sputtering to deposit a TiN coating on the MoS 2 A TiN coating is deposited on the coating surface.

[0018] In some embodiments, the bird feather structures are evenly distributed along the circumference of the diamond grinding wheel.

[0019] In some embodiments, the bird feather structure includes a central groove and a plurality of barb grooves distributed on both sides of the central groove, and the plurality of barb grooves located on the same side of the central groove are evenly spaced and arranged in parallel.

[0020] In some embodiments, the barb grooves are arranged to be symmetrically distributed about the central groove axis; and the angle between the barb grooves and the central groove is 30-60°.

[0021] The diamond grinding wheel prepared by the above preparation method has a bionic bird feather structure on its surface, and the diamond grinding wheel includes a diamond grinding wheel matrix, a Cr coating, a MoS 2 coating and TiN coating.

[0022] Compared with the prior art, the present invention has at least the following beneficial effects:

[0023] 1. The present invention improves the chip removal ability of the grinding wheel by microstructuring the surface of the diamond grinding wheel, making it difficult for broken abrasive particles and debris to clog the grinding wheel. The bionic bird feather-like microstructure is adopted, and the feather-like grooves help to guide the flow, which will further accelerate the speed at which the debris leaves the grinding wheel, reduce the friction between the chips and the grinding wheel surface during the processing, and make the workpiece material removed evenly, while reducing the grinding temperature, friction factors and abrasive wear during the grinding process.

[0024] 2. The present invention sequentially arranges Cr coating, MoS coating, etc. on the grinding wheel substrate from the inside to the outside. 2 The coating and TiN coating make the processed diamond grinding wheel have higher hardness, strength, wear resistance and oxidation resistance, and improve the grinding efficiency and service life of the grinding wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The present invention provides a flow chart of a method for preparing a diamond grinding wheel based on a composite coating and a bionic bird feather structure.

[0026] Figure 2 This is a schematic diagram of the three-dimensional structure of a diamond grinding wheel based on a composite coating and a bionic bird feather structure in Example 1 of the present invention; wherein: 1. diamond grinding wheel, 2. bird feather structure.

[0027] Figure 3 for Figure 2 Structural diagram of the structure of a middle bird feather; including: 21 central grooves, 22 barbel grooves.

[0028] Figure 4 Schematic diagram of the surface coating structure of a diamond grinding wheel based on a composite coating and a bionic bird feather structure in Example 1 of the present invention. DETAILED DESCRIPTION

[0029] The present invention is further described below in conjunction with the accompanying drawings, but the present invention is not limited in any way. Any changes or substitutions made based on the teachings of the present invention belong to the protection scope of the present invention.

[0030] Example 1

[0031] See also Figure 1 A method for preparing a diamond grinding wheel based on a composite coating and a bionic bird feather structure comprises the following steps:

[0032] S1, machining bionic bird feather structure on the surface of diamond grinding wheel substrate;

[0033] The surface of the diamond grinding wheel 1 is microstructured by laser processing technology. First, the drawing of the required bird feather structure is input into the laser system, the laser processing parameters are set, and the laser is controlled to scan and ablate the arc-shaped surface of the grinding wheel circumference, and the bird feather structure 2 is formed by ablating grooves of the required depth and width at predetermined positions on the grinding wheel surface.

[0034] The laser used for processing bird feather structure has an average power of 1-50w, a pulse frequency of 1-200kHz, a pulse width of 0.2-25ms, a wavelength of 1064nm, and a laser spot diameter of less than 10μm.

[0035] See also Figure 2 and Figure 3 The processed multiple feather structures 2 are evenly spaced along the circumference of the diamond grinding wheel 1. Each feather structure 2 includes a central groove 21 and a plurality of feather branch grooves 22 distributed on both sides of the central groove. The feather branch grooves 22 are symmetrically distributed on both sides of the central groove 21. The multiple feather branch grooves 22 on the same side of the central groove 21 are arranged in parallel and evenly spaced. The angle between the feather branch grooves 22 and the central groove 21 is 30-60°.

[0036] In this embodiment, the distance between two adjacent bird feather structures 2 is 35 mm, six barb grooves 22 are arranged on both sides of the central groove 21, the width of the barb groove 22 is 1.5 mm, the width of the central groove 21 is 3 mm, the depths of the central groove 21 and the barb groove 22 are both 1 mm, the distance between two adjacent barb grooves 22 is 5 mm, and the angle between the barb groove 22 and the central groove 21 is 35°.

[0037] Then the surface of the diamond grinding wheel substrate is ground and polished to a mirror surface, ultrasonically cleaned in anhydrous ethanol, and the cleaned diamond grinding wheel substrate is placed on a rotating frame.

[0038] S2, setting a Cr coating on the surface of the diamond grinding wheel substrate;

[0039] Firstly, the diamond grinding wheel substrate is glow cleaned by using a Hall ion source to remove oxides and other impurities on the substrate surface, and then a DC magnetron power supply is turned on to deposit a Cr coating on the surface of the diamond grinding wheel substrate.

[0040] In this embodiment, the deposition thickness of the Cr coating is 0.3-0.5 um.

[0041] By depositing a Cr coating on the surface of the diamond grinding wheel substrate, the adhesion of the molybdenum disulfide coating to the diamond grinding wheel body in the next step can be improved, thereby improving the quality of processing the molybdenum disulfide coating.

[0042] S3. MoS on Cr coating 2 coating;

[0043] Using MoS with a purity of 99.99% 2 Target material and RF magnetron sputtering method, first MoS 2 The target material is placed in the working room of the PVD / PECVD-600 composite multifunctional ion coating machine, and then the coating machine is turned on to remove excess gas to ensure that the machine working room is in a vacuum environment. Then the target material is heated and argon gas is introduced to make the atoms on the surface of the target material more active. Finally, ion bombardment is performed to accelerate the ions to hit the surface of the target material, making MoS 2 The atoms on the target surface dissociate and deposit onto the surface of the diamond grinding wheel, thereby forming MoS on the Cr coating. 2 coating.

[0044] In this embodiment, MoS 2 The deposition thickness of the coating is 3-5um.

[0045] S4, in MoS 2 A TiN coating is provided on the coating.

[0046] Using TiN target material with a purity of 99.99% and radio frequency magnetron sputtering, the TiN target material is first placed in the working room of the PVD / PECVD-600 composite multifunctional ion plating machine, and then the coating machine is turned on to remove excess gas to ensure that the machine working room is in a vacuum environment. Then the target material is heated and argon gas is introduced to make the atoms on the target surface more active. Finally, ion bombardment is performed to accelerate the ions to hit the target surface, so that the atoms on the surface of the TiN target material are dissociated and deposited on the surface of the diamond grinding wheel, thereby achieving MoS 2 A TiN coating is formed on the coating.

[0047] In this embodiment, the deposition thickness of the TiN coating is 1-1.2 um.

[0048] Considering that the bionic structure will cause a certain degree of wear on the molybdenum disulfide coating, it is easy to cause the coating abrasive particles to fall off during high-temperature processing of the diamond grinding wheel. In addition, the TiN coating has the advantages of high hardness, wear resistance, corrosion resistance, high melting point and high thermal conductivity. Therefore, the present invention provides a layer of TiN coating on the surface of the molybdenum disulfide coating to play a wear-resistant and high-temperature resistant protective role.

[0049] In this embodiment, the RF magnetron sputtering method is used to prepare the coating in both step S3 and step S4. This is because the RF magnetron sputtering method has unique advantages: simple and easy operation, high deposition efficiency, easy preparation of thick coatings, and easy in-situ repair of damaged coatings.

[0050] The diamond grinding wheel prepared by the above process has the advantages of high hardness, strong chip removal ability, long service life, fast grinding speed, good heat dissipation effect, etc. Its surface coating structure is as follows Figure 4 shown.

[0051] Example 2

[0052] In this embodiment, the bionic bird feather structure is not processed, but the surface of the diamond grinding wheel substrate is directly ground and polished and a Cr coating is provided. Other steps and parameters are the same as those of the preparation method used in Example 1.

[0053] Example 3

[0054] In this embodiment, the texture structure is still processed on the surface of the diamond wheel substrate, but compared with the bionic bird feather structure, the texture structure only retains the barb grooves. Other steps and parameters are the same as the preparation method used in Example 1.

[0055] Example 4

[0056] In this embodiment, MoS is provided on the Cr coating. 2 After coating, no longer in MoS 2 A TiN coating is then formed on the coating. Other steps and parameters are the same as those of the preparation method used in Example 1.

[0057] Example 5

[0058] In this embodiment, no MoS is provided on the Cr coating. 2 The TiN coating is directly provided instead of the coating. Other steps and parameters are the same as those of the preparation method adopted in Example 1.

[0059] The diamond grinding wheels prepared in the above Examples 1-3 were subjected to a performance comparison test to compare the tangential grinding force, normal grinding force, grinding force ratio and workpiece surface roughness of each grinding wheel under the same grinding conditions. See Table 1 below for details.

[0060] Table 1

[0061]

[0062] Based on the data in Table 1, the present invention reduces the grinding force ratio of the grinding wheel by setting a texture structure on the surface of the diamond grinding wheel, making the abrasive grains sharper and improving the chip removal ability of the grinding wheel, which not only reduces the wear degree of the grinding wheel, but also helps to improve the surface processing quality of the workpiece. In particular, the bionic bird feather-like texture structure is adopted, and the guiding fluidity of the groove is used to further accelerate the speed of the debris from the grinding wheel, reduce the friction between the chips and the grinding wheel surface during the processing, and has a better effect on reducing the grinding temperature and abrasive wear during the grinding process.

[0063] In addition, the performance comparison test of the diamond grinding wheels prepared in Examples 1, 4, and 5 was carried out. It was found that under the same grinding conditions, the grinding efficiency of Example 1 was the highest and the service life was much longer than that of Examples 4 and 5. Therefore, it can be seen that the present invention provides a Cr coating, a MoS coating, and a Cr coating on the grinding wheel substrate in sequence from the inside to the outside. 2 Coating and TiN coating improve the hardness, strength, wear resistance and oxidation resistance of diamond grinding wheels as a whole.

[0064] It should be noted that the serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages and disadvantages of the embodiments. And the terms "including", "comprising" or any other variants thereof in this article are intended to cover non-exclusive inclusion, so that a process, device, article or method including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, device, article or method. In the absence of further restrictions, an element defined by the sentence "including a ..." does not exclude the presence of other identical elements in the process, device, article or method including the element.

[0065] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes a number of instructions for a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0066] The above are only some embodiments of the present invention, which are only used to illustrate the technical solution of the present invention rather than to limit the patent scope of the present invention. Any equivalent structure or equivalent process changes made by ordinary technicians in the field based on the contents of the description and drawings of the present invention, without departing from the purpose and scope of the technical solution of the present invention, should be included in the protection scope of the claims of the present invention.

Claims

1. A method for preparing a diamond grinding wheel based on a composite coating and a bionic bird feather structure, characterized in that: The steps include: S1, machining bionic bird feather structure on the surface of diamond grinding wheel substrate; S2, setting a Cr coating on the surface of the diamond grinding wheel substrate; S3, providing a MoS2 coating on the Cr coating; S4, providing a TiN coating on the MoS2 coating; The process of machining the bionic bird feather structure on the surface of the diamond grinding wheel substrate in step S1 comprises: Input the drawing of the required bird feather structure into the laser system, set the laser processing parameters, and use the laser to ablate a groove of corresponding depth and width on the surface of the diamond grinding wheel to form the bird feather structure; The process of step S2 of providing a Cr coating on the surface of the diamond grinding wheel substrate comprises: The diamond wheel substrate is glow cleaned by using a Hall ion source to remove oxides and impurities on the surface, and a DC magnetron power supply is turned on to deposit a Cr coating on the surface of the diamond wheel substrate. The process of step S3 of providing a MoS2 coating on the Cr coating comprises: A MoS2 target material with a purity of 99.99% is placed in the working room of an ion plating machine, the working room is evacuated to a vacuum environment, the target material is heated, argon gas is introduced, and a MoS2 coating is deposited on the surface of the Cr coating by a radio frequency magnetron sputtering method; The process of providing a TiN coating on the MoS2 coating in step S4 includes: A TiN target material with a purity of 99.99% is placed in the working room of an ion plating machine, the working room is evacuated to a vacuum environment, the target material is heated, argon gas is introduced, and a TiN coating is deposited on the surface of the MoS2 coating by a radio frequency magnetron sputtering method; The bird feather structures are evenly distributed along the circumference of the diamond grinding wheel; The bird feather structure includes a central groove and a plurality of barb grooves distributed on both sides of the central groove, and the plurality of barb grooves located on the same side of the central groove are evenly spaced and arranged in parallel; The barb grooves are arranged to be symmetrically distributed about the central groove axis; and the angle between the barb grooves and the central groove is 30-60°.

2. The method for preparing a diamond grinding wheel based on a composite coating and a bionic bird feather structure according to claim 1, characterized in that: The process of machining the bionic bird feather structure on the surface of the diamond grinding wheel substrate in step S1 also includes: The surface of the diamond wheel substrate after laser processing was polished to a mirror surface and ultrasonically cleaned in anhydrous ethanol.

3. The diamond grinding wheel prepared by the preparation method according to any one of claims 1 or 2, characterized in that: The surface of the diamond grinding wheel is provided with a bionic bird feather structure, and the diamond grinding wheel comprises a diamond grinding wheel substrate, a Cr coating, a MoS2 coating and a TiN coating in sequence from the inside to the outside.

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