Ostrich foot sole microstructure-based thermoelectric refrigeration grinding wheel

Abstract

The present application relates to the technical field of grinding wheel, especially to a thermoelectric refrigeration grinding wheel based on ostrich foot bottom microstructure, which comprises a grinding wheel base and a grinding wheel abrasive layer arranged outside the grinding wheel base, the grinding wheel base comprises a disc shell and a supporting rib arranged in the disc shell, and a thermoelectric refrigeration mechanism is arranged between the grinding wheel abrasive layer and the grinding wheel base, the thermoelectric refrigeration mechanism comprises a plurality of thermoelectric refrigeration pieces arranged in sequence and connected end to end on the side wall of the disc shell. The grinding wheel abrasive surface is designed based on the ostrich foot papillary structure, the wear resistance of the grinding wheel is improved through the bionic structure, the grinding fluid can enter the grinding wheel more uniformly, and the grinding dust can be discharged more smoothly. In addition, through the thermoelectric refrigeration mechanism, the grinding heat can be conducted to the inside of the grinding wheel, the grinding temperature can be reduced, the service life of the grinding wheel can be increased, and the technical problems existing in the prior art are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of grinding wheels, and particularly relates to a thermoelectric refrigeration grinding wheel based on the microstructure of ostrich foot bottom. BACKGROUND

[0002] Grinding is widely used in mechanical processing of parts, especially in the process of precision machining. Grinding is suitable for hard materials that are difficult to cut by traditional tools and materials with high requirements for surface quality and dimensional accuracy. In the process of grinding, the abrasive particles on the surface of the grinding wheel and the material being processed move relative to each other, removing material while causing wear of the grinding wheel. In addition, the accumulation of heat during grinding will further exacerbate the wear of the grinding wheel. Therefore, grinding fluid is often used for cooling and promoting chip removal during grinding. However, the airflow generated by the high-speed rotation of the grinding wheel forms an "air barrier", making it difficult for the grinding fluid to enter the grinding zone of the grinding wheel, resulting in low utilization efficiency of the grinding fluid. In addition, heat is also accumulated during the operation of the grinding wheel, which will affect the machining accuracy of the parts. Grinding also causes the grinding wheel to withstand a large force, and the abrasive particles are prone to fall off. These problems will shorten the service life of the grinding wheel and reduce the quality of part processing.

[0003] To improve the strength of the grinding wheel and prolong its service life, a diamond grinding wheel with lotus structure is disclosed in patent CN107984401A. The grinding wheel has multiple through holes on the outer periphery of the abrasive layer, and the resin-bonded diamond abrasive particles are placed in the through holes, forming a biomimetic structure similar to a lotus. The uniformly distributed abrasive particles make the grinding wheel have good thermal conductivity and be more durable than general grinding wheels. In addition, since the abrasive particles are embedded in the grinding layer, they can effectively prevent the abrasive particles from falling off due to grinding force during grinding. However, due to the special structure of the "lotus", the abrasive particles that make up the grinding wheel are generally large in size and small in effective processing area, which cannot be used for very precise processing. At the same time, the cooling liquid sprayed from the outside still cannot fully enter the grinding zone, and the grinding temperature cannot be well controlled, which increases the risk of workpiece burning and leaves room for improvement in the service life of the grinding wheel. SUMMARY

[0004] The application makes up for the deficiency of the prior art, and provides a thermoelectric refrigeration grinding wheel based on ostrich foot bottom microstructure, which has a reasonable structure, and the grinding wheel grinding surface is designed based on ostrich foot bottom papillary structure, so that the wear resistance of the grinding wheel is improved, the grinding fluid can enter the grinding wheel more uniformly, and the grinding dust can be discharged more smoothly.

[0005] The application adopts the technical scheme that:

[0006] A kind of bionic grinding wheel based on ostrich foot bottom microstructure, including grinding wheel matrix and the abrasive layer of grinding wheel that is set at the outer side of grinding wheel matrix, the grinding wheel matrix includes disc shell and the support rib that is set in disc shell, and the thermoelectric refrigeration mechanism is equipped between abrasive layer of grinding wheel and grinding wheel matrix, the thermoelectric refrigeration mechanism includes a plurality of thermoelectric refrigeration pieces that are sequentially connected head to tail and are wound on the side wall of disc shell, and a heat dissipation mechanism that is matched with the front side of grinding wheel matrix is arranged on the front side of grinding wheel matrix, the heat dissipation mechanism includes an electro-hydraulic combined conductive slip ring, the electro-hydraulic combined conductive slip ring includes a stator end provided with a first passage and a second passage, and a rotor end provided with a third passage and a fourth passage, the rotor end of the electro-hydraulic combined conductive slip ring is fixedly connected to the front side wall of disc shell, a liquid inlet connector that is communicated with the third passage of the rotor end and a liquid outlet connector that is communicated with the fourth passage of the rotor end are respectively arranged on the front side wall of disc shell, a plurality of bionic microstructure units are respectively arranged on the wheel surface of abrasive layer of grinding wheel along the circumferential direction thereof at intervals, the bionic microstructure units are sequentially and adjacently arranged, and the bionic microstructure unit includes a liquid inlet area, a grinding area and a chip removal area that are sequentially and adjacently arranged.

[0007] A liquid inlet module is symmetrically arranged on the left and right sides in the liquid inlet area, and each liquid inlet module includes a plurality of liquid inlet papillary grinding bars that are arranged in parallel, and the liquid inlet papillary grinding bars of the two liquid inlet modules form an included angle upward.

[0008] A plurality of papillary abrasive grains are arranged in the grinding area.

[0009] A chip removal module is symmetrically arranged on the left and right sides in the chip removal area, and each chip removal module includes a plurality of chip removal papillary grinding bars that are arranged in parallel, and the chip removal papillary grinding bars of the two chip removal modules form an included angle downward.

[0010] Optionally, the cold face of each of the thermoelectric refrigeration pieces is tightly abutted against the abrasive layer of the grinding wheel, and the hot face is tightly abutted against the side wall of the disc shell, and each of the thermoelectric refrigeration pieces corresponds to each of the bionic microstructure units.

[0011] Optionally, each of the nipple abrasive grains is formed by laser engraving, and has a circular shape.

[0012] Optionally, each of the liquid inlet nipple abrasive strips is formed by laser engraving, has a long strip shape, and has rounded corners.

[0013] Optionally, each of the chip removal nipple abrasive strips is formed by laser engraving, has a long strip shape, and has rounded corners.

[0014] Optionally, the liquid inlet nipple abrasive strips of the two liquid inlet modules form an acute angle upward.

[0015] Optionally, the liquid inlet nipple abrasive strips of the two liquid inlet modules form an angle of 60 degrees upward.

[0016] Optionally, the chip removal nipple abrasive strips of the two chip removal modules form an acute angle downward.

[0017] Optionally, the chip removal nipple abrasive strips of the two chip removal modules form an angle of 60 degrees downward.

[0018] Optionally, a protective cover is arranged on the stator end of the electro-hydraulic combined conductive slip ring and covers the grinding wheel base.

[0019] The technical scheme has the following advantages:

[0020] 1. Based on the bionic design of the ostrich foot nipple structure on the grinding wheel grinding surface, the grinding wheel can be uniformly cooled and lubricated by the grinding fluid, the chip removal capacity is significantly improved, the grinding performance of the grinding wheel and the utilization rate of the grinding fluid are effectively improved, the cooling, lubrication and chip removal effects of the grinding fluid in the grinding process are enhanced, the machining precision of the machined workpiece is improved, the service life of the grinding wheel is prolonged, and the grinding efficiency is improved.

[0021] 2. The good chip containing and removal capacity effectively inhibits the grinding wheel blockage, the abrasive grain sharpness retention is good, the grinding wheel dressing cycle is prolonged, and the grinding surface quality and grinding efficiency are significantly improved.

[0022] 3. The thermoelectric refrigeration piece can be used to realize efficient transfer of grinding heat to the inside of the grinding wheel, and the thermoelectric refrigeration mechanism can be used to realize significant reduction of heat, effectively solving the technical bottleneck of grinding wheel and workpiece burn, thereby improving the workpiece machining quality. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a schematic diagram of the three-dimensional structure of the present application;

[0024] Figure 2 Fig. 1 is a schematic diagram of the three-dimensional structure of the grinding wheel base and the grinding wheel abrasive layer;

[0025] Figure 3 Fig. 2 is a schematic diagram of the structure of the bionic microstructure unit;

[0026] Figure 4 Fig. 3 is a schematic diagram of the three-dimensional structure of the grinding wheel base;

[0027] Figure 5 Fig. 4 is a schematic diagram of the side view structure of the grinding wheel base; Figure 4

[0028] Figure 6 Fig. 5 is a schematic diagram of the cross-sectional structure of the grinding wheel base along A-A direction; Figure 5

[0029] Fig. 6 is a schematic diagram of the three-dimensional structure of the electro-hydraulic combined conductive slip ring; Figure 7

[0030] In the figure, 1 is the grinding wheel base; 101 is the disc shell; 102 is the support rib; 103 is the liquid inlet connector; 104 is the liquid outlet connector; 2 is the grinding wheel abrasive layer; 3 is the thermoelectric refrigeration piece; 4 is the electro-hydraulic combined conductive slip ring; 401 is the first passage; 402 is the second passage; 403 is the stator end; 404 is the third passage; 405 is the fourth passage; 406 is the rotor end; 5 is the bionic microstructure unit; 6 is the liquid inlet area; 7 is the grinding area; 8 is the chip removal area; 9 is the liquid inlet papillary abrasive strip; 10 is the papillary abrasive grain; 11 is the chip removal papillary abrasive strip; and 12 is the protective cover. DETAILED DESCRIPTION

[0031] In order to clearly illustrate the technical features of the present application, the present application will be described in detail below with specific embodiments and in conjunction with the accompanying drawings. In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and therefore, the scope of protection of the present application is not limited by the specific embodiments disclosed below.

[0032] ​​In addition, in the description of the present application, it is to be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of facilitating the description of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0033] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms is not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0034] As Figures 1-7As shown, a kind of bionic grinding wheel based on ostrich foot bottom microstructure, including grinding wheel base body 1 and the abrasive layer 2 of grinding wheel set on the outer side of grinding wheel base body 1, the grinding wheel base body 1 includes disc shell 101 and the support rib 102 being set in disc shell 101, the thermoelectric refrigeration mechanism being equipped between abrasive layer 2 and grinding wheel base body 1, the thermoelectric refrigeration mechanism includes several thermoelectric refrigeration pieces 3 being sequentially connected head-to-tail around the side wall of disc shell 101, the heat dissipation mechanism being equipped with on the front side of grinding wheel base body 1, the heat dissipation mechanism includes electric liquid combined conductive slip ring 4, the electric liquid combined conductive slip ring 4 includes the stator end 403 being equipped with first passage 401, second passage 402 and the rotor end 406 being equipped with third passage 404, fourth passage 405, the rotor end 406 of electric liquid combined conductive slip ring 4 is fixedly connected on the front side wall of disc shell 101, the liquid inlet connection pipe 103 being communicated with the third passage 404 of rotor end 406 and the liquid outlet connection pipe 104 being communicated with the fourth passage 405 of rotor end 406 are respectively equipped on the front side wall of disc shell 101, several bionic microstructure units 5 are respectively spaced along the circumferential direction of abrasive layer 2 on the surface of abrasive layer 2, each bionic microstructure unit 5 is sequentially connected head-to-tail, the bionic microstructure unit 5 includes liquid inlet area 6, grinding area 7 and chip removal area 8 being sequentially arranged adjacent to each other:

[0035] The liquid inlet module is symmetrically arranged on the left and right sides in the liquid inlet area 6, and each liquid inlet module includes several liquid inlet papillary abrasive strips 9 arranged in parallel with each other, and the liquid inlet papillary abrasive strips 9 of the two liquid inlet modules form an included angle upwardly.

[0036] The grinding area 7 is provided with several papillary abrasive grains 10, and each papillary abrasive grain 10 is uniformly arranged in the grinding area 7.

[0037] The chip removal area 8 is symmetrically provided with a chip removal module on the left and right sides, and each chip removal module includes several chip removal papillary abrasive strips 11 arranged in parallel with each other, and the chip removal papillary abrasive strips 11 of the two chip removal modules form an included angle downwardly.

[0038] Optionally, the cold face of each thermoelectric refrigeration piece 3 is tightly abutted against the abrasive layer 2, and the hot face is tightly abutted against the side wall of the disc shell 101, and each thermoelectric refrigeration piece 3 is arranged corresponding to each bionic microstructure unit 5.

[0039] Optionally, each papillary abrasive grain 10 is formed by laser engraving, and the shape of each papillary abrasive grain 10 is circular.

[0040] Optionally, each liquid inlet papillary abrasive strip 9 is formed by laser engraving, and the shape of each liquid inlet papillary abrasive strip 9 is in the shape of a long strip, and the four corners are provided with rounded corners.

[0041] Optionally, each chip removal papillary abrasive strip 11 is formed by laser engraving, and the shape of each chip removal papillary abrasive strip 11 is in the shape of a long strip, and the four corners are provided with rounded corners.

[0042] Optionally, the liquid inlet nipple abrasive strips 9 of the two liquid inlet modules form an acute angle upward.

[0043] Optionally, the liquid inlet nipple abrasive strips 9 of the two liquid inlet modules form an angle of 60 degrees upward.

[0044] Optionally, the two chip removal nipple abrasive strips 11 of the chip removal modules form an acute angle downward.

[0045] Optionally, the two chip removal nipple abrasive strips 11 of the chip removal modules form an angle of 60 degrees downward.

[0046] Optionally, a protective cover 12 is arranged on the stator end 403 of the electro-hydraulic combined conductive slip ring 4 and covers the grinding wheel base 1.

[0047] Optionally, the grinding wheel abrasive layer 2 is fixed on the grinding wheel base 1 by sintering.

[0048] Ostrich is a large bird that lives in desert and gobi area. Due to the survival needs, it can run stably and quickly on unstable terrain such as sand. The foot bottom of ostrich has a very special nipple structure, which can increase the friction and reduce the damage. The bionic grinding wheel is just to imitate the bionic morphology of the abrasive particles on the grinding wheel and adjust the bionic arrangement by means of this structure. Through the nipple structure on the foot bottom of ostrich, the anti-wear characteristics of the grinding wheel are improved, so that it is not easy to wear in the processing process.

[0049] The bionic grinding wheel, each bionic microstructure unit can promote the smooth entry of the grinding fluid through the set liquid inlet area 4, the grinding fluid passes through the liquid inlet papillary grinding strip 7, converges to the middle and flows into the grinding area 5, plays a correct drainage role on the grinding fluid, and the grinding area 5 mainly plays a grinding role on the workpiece. The grinding area 5 reduces the grinding temperature by introducing the grinding fluid, thereby effectively improving the damage of the bionic grinding wheel. The grinding dust and the grinding fluid under the grinding are entered into the chip removal area 6 along with the rotation of the bionic grinding wheel, and the chip removal papillary grinding strip 9 guides the grinding dust and the grinding fluid to be discharged outward to both sides of the bionic grinding wheel, avoiding the accumulation of the grinding dust in the grinding wheel, thereby improving the quality of the machined workpiece and prolonging the service life of the grinding wheel. The bionic grinding wheel is staggered by the liquid inlet area 4 and the chip removal area 6 of the adjacent bionic microstructure unit, which can further play a role of breaking obstacles, thereby weakening the air barrier formed in the high-speed rotation process of the grinding wheel, making the grinding fluid enter smoothly, and the grinding dust is discharged outward smoothly. It has a reasonable structure, is based on the bionic design of the ostrich foot papillary structure on the grinding surface of the grinding wheel, and the bionic structure improves the wear resistance of the grinding wheel, and makes the grinding fluid enter the grinding wheel more uniformly, and promotes the grinding dust to be discharged more smoothly. In addition, the heat generated by the grinding wheel abrasive layer 2 in the grinding process is transferred to the disc shell 101 through the thermoelectric refrigeration sheet 3, and the cooling liquid passes through the first passage 401 on the stator end 403 of the electro-hydraulic combined conductive slip ring 4, enters the third passage 404 of the rotor end 406, and finally flows into the disc shell 101. At this time, the heat transferred by the thermoelectric refrigeration sheet 3 is neutralized, so that the thermoelectric refrigeration sheet 3 can continuously cool the grinding wheel abrasive layer. The cooling liquid in the disc shell 101 flows into the second passage 402 through the fourth passage 405 and flows out, forming a closed loop, thereby realizing efficient transfer of grinding heat to the inside of the grinding wheel, effectively solving the technical bottleneck of grinding wheel and workpiece burn, increasing the service life of the grinding wheel, reducing the grinding temperature, accelerating the chip removal efficiency, improving the grinding performance of the grinding wheel, and significantly improving the self-sharpening of the grinding wheel. It is especially suitable for precision machining of workpieces, so that the machining quality of the workpiece is improved, and the technical problems existing in the prior art are solved.

[0050] For the processing of the grinding wheel abrasive layer 2, a picosecond laser can be used to process the bionic structure. The laser has a Burst Mode function, a wavelength of 1064nm, a beam roundness of more than 90%, a light pointing stability of less than 50urad, a light polarization ratio of 100:1 and a maximum power of up to 50W. Through laser processing, bionic microstructure units can be formed on the grinding wheel abrasive layer 2.

[0051] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit the present application; although the present application is described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions recorded in the above embodiments can be modified, or some or all of the technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application; any alternative improvement or change made by those skilled in the art to the embodiments of the present application falls within the protection scope of the present application.

[0052] The parts not described in detail in the present application are well-known to those skilled in the art.

Claims

1. A thermoelectric refrigeration grinding wheel based on the microstructure of ostrich foot bottom, comprising a grinding wheel base and a grinding wheel abrasive layer arranged outside the grinding wheel base, characterized in that, The grinding wheel base includes a disc shell and a supporting rib arranged in the disc shell, a thermoelectric refrigeration mechanism is arranged between the grinding wheel abrasive layer and the grinding wheel base, the thermoelectric refrigeration mechanism includes a plurality of thermoelectric refrigeration pieces arranged in sequence and connected end to end on the side wall of the disc shell, a heat dissipation mechanism matched with the grinding wheel base is arranged on the front side of the grinding wheel base, the heat dissipation mechanism includes an electro-hydraulic combined conductive slip ring, the electro-hydraulic combined conductive slip ring includes a stator end provided with a first passage and a second passage and a rotor end provided with a third passage and a fourth passage, the rotor end of the electro-hydraulic combined conductive slip ring is fixedly connected to the front side wall of the disc shell, a liquid inlet connecting pipe connected to the third passage of the rotor end and a liquid outlet connecting pipe connected to the fourth passage of the rotor end are respectively arranged in communication on the front side wall of the disc shell, a plurality of bionic microstructure units are respectively arranged in the circumferential direction of the grinding wheel abrasive layer and are spaced apart, the bionic microstructure units are arranged in sequence and connected end to end, and the bionic microstructure units include a liquid inlet area, a grinding area and a chip removal area arranged in sequence and adjacent to each other: A liquid inlet module is symmetrically arranged on the left and right sides in the liquid inlet area, and each liquid inlet module includes a plurality of liquid inlet papillary abrasive strips arranged in parallel, and the liquid inlet papillary abrasive strips of the two liquid inlet modules form an included angle upward; A plurality of papillary abrasive grains are arranged in the grinding area; A chip removal module is symmetrically arranged on the left and right sides in the chip removal area, and each chip removal module includes a plurality of chip removal papillary abrasive strips arranged in parallel, and the chip removal papillary abrasive strips of the two chip removal modules form an included angle downward.

2. The thermoelectric cooling wheel based on the ostrich foot bottom microstructure according to claim 1, characterized in that, The cold face of each thermoelectric refrigeration piece is tightly abutted against the grinding wheel abrasive layer, the hot face is tightly abutted against the side wall of the disc shell, and each thermoelectric refrigeration piece is arranged corresponding to each bionic microstructure unit.

3. The thermoelectric cooling wheel based on the ostrich foot bottom microstructure according to claim 1, characterized in that, Each papillary abrasive grain is formed by laser engraving, and the shape is circular.

4. The thermoelectric cooling wheel based on the ostrich foot bottom microstructure according to claim 1, characterized in that, Each liquid inlet papillary abrasive strip is formed by laser engraving, and the shape is a long strip with rounded corners at the four corners.

5. The thermoelectric cooling wheel based on the ostrich foot bottom microstructure according to claim 1, characterized in that, Each chip removal papillary abrasive strip is formed by laser engraving, and the shape is a long strip with rounded corners at the four corners.

6. The thermoelectric cooling wheel based on the ostrich foot bottom microstructure according to claim 5, characterized in that, The included angle formed upward by the liquid inlet papillary abrasive strips of the two liquid inlet modules is an acute angle.

7. The thermoelectric cooling wheel based on the ostrich foot bottom microstructure according to claim 1, characterized in that, The included angle formed upward by the liquid inlet papillary abrasive strips of the two liquid inlet modules is 60 degrees.

8. The thermoelectric cooling wheel based on the ostrich foot bottom microstructure according to claim 7, characterized in that, The included angle formed downward by the chip removal papillary abrasive strips of the two chip removal modules is an acute angle.

9. The thermoelectric cooling wheel based on the ostrich foot bottom microstructure according to claim 1, characterized in that, The included angle formed downward by the chip removal papillary abrasive strips of the two chip removal modules is 60 degrees.

10. The thermoelectric cooling wheel based on the ostrich foot bottom microstructure according to claim 1, characterized in that, A protective cover is arranged on the stator end of the electro-hydraulic combined conductive slip ring and covers the grinding wheel base.

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