High-performance white corundum ceramic-based precision grinding wheel

Abstract

The utility model relates to abrasive disc technical field discloses a kind of high-performance white corundum ceramic base precision abrasive disc, including mounting ring, the outer wall surface of mounting ring is equipped with tenacity matrix layer, the outer wall surface of tenacity matrix layer is equipped with transition layer, the outer wall surface of transition layer is equipped with working layer, and the periphery of working layer is provided with several air holes.The high-performance white corundum ceramic base precision abrasive disc, through the unique three-layer composite structure design of tenacity matrix layer, transition layer and working layer, inner layer is high-strength, tenacity matrix, middle layer is as stress buffer and outer layer multiple toughening, can effectively customer traditional white corundum ceramic abrasive disc tenacity deficiency, easy to break, abrasive grain easy to fall off Problem, realizes the qualitative leap of abrasive disc strength, tenacity, durability, security and grinding performance, and comprehensive performance significantly improves, prolongs service life and reduces use cost.

Description

Technical Field

[0001] This utility model relates to the field of grinding wheel technology, and in particular to a high-performance white corundum ceramic-based precision grinding wheel. Background Technology

[0002] White fused alumina abrasive is widely used in precision grinding, tool sharpening, and hard and brittle material processing due to its high hardness, good self-sharpening properties, excellent chemical stability, relatively low grinding heat generation, and low reactivity with ferrous metals. It is especially suitable for applications requiring high workpiece surface finish and precision.

[0003] However, most white fused alumina ceramic-based precision grinding wheels on the market currently lack sufficient toughness. Under high-speed or high-load conditions, stress concentration can easily lead to crack propagation, causing the grinding wheel to break completely, posing a safety hazard and potentially resulting in workpiece scrapping and equipment damage. At the same time, the holding force of white fused alumina abrasive grains is relatively weak, and the grains are prone to premature detachment, causing accelerated grinding wheel wear and reduced machining accuracy. This not only results in expensive abrasive waste but also severely reduces the effective service life of the grinding wheel, increasing the frequency and cost of replacing the grinding wheel. Utility Model Content

[0004] In view of the problems of insufficient toughness and premature abrasive grain shedding in existing white fused alumina grinding wheels, this utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide a high-performance white fused alumina ceramic-based precision grinding wheel, which aims to overcome the problems of insufficient toughness, easy breakage, and easy shedding of abrasive grains in traditional white fused alumina ceramic grinding wheels.

[0006] To solve the above technical problems, this utility model provides the following technical solution: a high-performance white corundum ceramic-based precision grinding wheel, including a mounting ring, a tough matrix layer sleeved on the outer wall of the mounting ring, a transition layer sleeved on the outer wall of the tough matrix layer, a working layer sleeved on the outer wall of the transition layer, and a plurality of pores provided on the peripheral surface of the working layer. The working layer includes a hard layer, a first toughening layer and an abrasive layer. The hard layer is fixed in the inner hole of the first toughening layer, and the first toughening layer is fixed in the inner hole of the abrasive layer.

[0007] As an improved technical solution, a first binder layer is bonded between the hard layer and the first toughening layer, and the hard layer and the first toughening layer are fixed together by the first binder layer. A second binder layer is bonded between the abrasive layer and the first toughening layer, and the first toughening layer and the abrasive layer are fixed together by the second binder layer. Zirconia particles are added inside both the first binder layer and the second binder layer.

[0008] As an improved technical solution, the abrasive layer is a white corundum abrasive layer, the hard layer is a nano-scale nanodiamond particle layer, and the first toughening layer is a ceramic short fiber layer.

[0009] As an improved technical solution, the transition layer is provided with a number of closed pores, and the transition layer is a metal-ceramic layer.

[0010] As an improved technical solution, the tough matrix layer includes an inner high-strength ceramic layer and an outer high-strength ceramic layer. A third toughening layer is provided on the inner wall surface of the outer high-strength ceramic layer, and a second toughening layer is sleeved on the outer wall surface of the inner high-strength ceramic layer. A metallic phase toughening layer is fixed between the second toughening layer and the third toughening layer.

[0011] As an improved technical solution, both the inner high-strength ceramic layer and the outer high-strength ceramic layer are alumina ceramic layers, both the second toughening layer and the third toughening layer are short-cut carbon fiber layers, and the metal phase toughening layer is a ductile metal phase layer.

[0012] After adopting the above technical solution, the beneficial effects of this utility model are: 1. In this invention, a certain amount of zirconium oxide particles are added to the first binder layer and the second binder layer. When the stress field at the crack tip triggers its transformation to the monoclinic phase, the volume expansion generates compressive stress, which hinders crack propagation and effectively toughens the working layer. At the same time, the first toughening layer in the matrix plays a role in bridging cracks, preventing crack opening and fiber pull-out, which further significantly improves toughness. After strengthening and toughening, it provides a strong holding force to the binder, preventing abrasive particles from falling off prematurely, and reducing edge chipping and breakage.

[0013] 2. In this utility model, the second toughening layer and the third toughening layer form a bridging and pull-out mechanism, which significantly improves fracture toughness. Furthermore, the presence of the metallic phase toughening layer allows for energy absorption through plastic deformation, providing the overall mechanical strength and rigidity of the grinding wheel and resisting deformation and fracture caused by grinding force and centrifugal force.

[0014] 3. This utility model, through a unique three-layer composite structure design of a tough matrix layer, a transition layer and a working layer, with the inner layer being a high-strength and tough matrix, the middle layer serving as a stress buffer and the outer layer providing multiple toughening, effectively addresses the problems of insufficient toughness, easy breakage and easy abrasive grain shedding in traditional white corundum ceramic grinding wheels. It achieves a qualitative leap in the strength, toughness, durability, safety and grinding performance of the grinding wheel, significantly improving overall performance, extending service life and reducing usage costs. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them: Figure 1 This is a schematic diagram of the overall structure of a high-performance white corundum ceramic-based precision grinding wheel according to this utility model.

[0016] Figure 2 This is a schematic diagram of the working layer of a high-performance white corundum ceramic-based precision grinding wheel according to this utility model.

[0017] Figure 3 This is a schematic diagram of the tough matrix layer of a high-performance white corundum ceramic-based precision grinding wheel according to this utility model.

[0018] Explanation of reference numerals in the attached figures: 1. Mounting ring; 2. Tough matrix layer; 21. Inner high-strength ceramic layer; 22. Second toughening layer; 23. Metal phase toughening layer; 24. Third toughening layer; 25. Outer high-strength ceramic layer; 3. Transition layer; 4. Working layer; 41. Hard layer; 42. First binder layer; 43. First toughening layer; 44. Second binder layer; 45. Abrasive layer; 5. Pores. Detailed Implementation

[0019] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Example

[0020] Reference Figures 1-3 This is the first embodiment of the present invention, which provides a high-performance white fused alumina ceramic-based precision grinding wheel. This high-performance white fused alumina ceramic-based precision grinding wheel includes a mounting ring 1, a tough matrix layer 2 sleeved on the outer wall of the mounting ring 1, a transition layer 3 sleeved on the outer wall of the tough matrix layer 2, a working layer 4 sleeved on the outer wall of the transition layer 3, and a plurality of pores 5 provided on the peripheral surface of the working layer 4. The pores 5 are used for chip collection, heat dissipation and introduction of cooling lubricant. The pores 5 provide coolant channels and chip collection space, reduce grinding temperature and reduce workpiece burn and blockage. The working layer 4 includes a hard layer 41, a first toughening layer 43 and an abrasive layer 45. The hard layer 41 is fixed in the inner hole of the first toughening layer 43, and the first toughening layer 43 is fixed in the inner hole of the abrasive layer 45.

[0021] Through a unique three-layer composite structure design consisting of a tough matrix layer 2, a transition layer 3, and a working layer 4, the inner layer is a high-strength, tough matrix, the middle layer serves as a stress buffer, and the outer layer provides multiple toughenings. This effectively addresses the problems of insufficient toughness, easy breakage, and easy abrasive grain shedding in traditional white corundum ceramic grinding wheels. It achieves a qualitative leap in the strength, toughness, durability, safety, and grinding performance of the grinding wheel, significantly improving overall performance, extending service life, and reducing operating costs.

[0022] A first binder layer 42 is bonded between the hard layer 41 and the first toughening layer 43, and the hard layer 41 and the first toughening layer 43 are fixed together by the first binder layer 42. A second binder layer 44 is bonded between the abrasive layer 45 and the first toughening layer 43, and the first toughening layer 43 and the abrasive layer 45 are fixed together by the second binder layer 44. Zirconia particles are added inside both the first binder layer 42 and the second binder layer 44. When a certain amount of zirconia particles are added to the first binder layer 42 and the second binder layer 44, the volume expansion generates compressive stress when the stress field at the crack tip triggers its transformation to the monoclinic phase, which hinders crack propagation and effectively achieves a toughening effect on the working layer 4.

[0023] The abrasive layer 45 is a white corundum abrasive layer, and the hard layer 41 is a nano-sized nano-diamond particle layer. The hard layer 41 improves the hardness, strength and wear resistance of the binder matrix. The first toughening layer 43 is a ceramic short fiber layer. The first toughening layer 43 plays a role in bridging cracks, preventing crack opening and fiber pull-out in the matrix, which further significantly improves toughness. After strengthening and toughening, it provides strong holding force to the binder, prevents abrasive particles from falling off prematurely, and at the same time reduces edge chipping and breakage.

[0024] The transition layer 3 has several closed pores, which can blunt the crack tip and absorb energy. The closed pores are achieved by a pore-forming agent or a special sintering process. The transition layer 3 is a metal-ceramic layer. The arrangement of the transition layer 3 and the closed pores on it forms a gradient transition between the tough matrix layer 2 and the working layer 4, which absorbs and dissipates the impact load and alternating stress transmitted from the working layer and reduces the peak stress transmitted to the matrix layer.

[0025] The toughness matrix layer 2 includes an inner high-strength ceramic layer 21 and an outer high-strength ceramic layer 25. The inner high-strength ceramic layer 21 is located in the inner hole of the outer high-strength ceramic layer 25. A third toughening layer 24 is provided on the inner wall surface of the outer high-strength ceramic layer 25. A second toughening layer 22 is sleeved on the outer wall surface of the inner high-strength ceramic layer 21. A metallic phase toughening layer 23 is fixed between the second toughening layer 22 and the third toughening layer 24. The arrangement of the second toughening layer 22 and the third toughening layer 24 forms a bridging and pull-out mechanism, which significantly improves fracture toughness. Through the arrangement of the metallic phase toughening layer 23, energy is absorbed through plastic deformation, providing the overall mechanical strength and rigidity of the grinding wheel and resisting deformation and fracture caused by grinding force and centrifugal force.

[0026] Both the inner high-strength ceramic layer 21 and the outer high-strength ceramic layer 25 are alumina ceramic layers, the second toughening layer 22 and the third toughening layer 24 are both short-cut carbon fiber layers, and the metallic phase toughening layer 23 is a ductile metallic phase layer, such as Co or Ni.

[0027] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A high-performance white corundum ceramic-based precision grinding wheel, comprising a mounting ring (1), characterized in that: The outer wall of the mounting ring (1) is fitted with a tough matrix layer (2), the outer wall of the tough matrix layer (2) is fitted with a transition layer (3), the outer wall of the transition layer (3) is fitted with a working layer (4), and the peripheral surface of the working layer (4) is provided with a number of air holes (5). The working layer (4) includes a hard layer (41), a first toughening layer (43) and an abrasive layer (45). The hard layer (41) is fixed in the inner hole of the first toughening layer (43), and the first toughening layer (43) is fixed in the inner hole of the abrasive layer (45).

2. The high-performance white corundum ceramic-based precision grinding wheel according to claim 1, characterized in that: A first binder layer (42) is bonded between the hard layer (41) and the first toughening layer (43), and the hard layer (41) and the first toughening layer (43) are fixed together by the first binder layer (42). A second binder layer (44) is bonded between the abrasive layer (45) and the first toughening layer (43), and the first toughening layer (43) and the abrasive layer (45) are fixed together by the second binder layer (44). Zirconia particles are added inside both the first binder layer (42) and the second binder layer (44).

3. The high-performance white corundum ceramic-based precision grinding wheel according to claim 2, characterized in that: The abrasive layer (45) is a white corundum abrasive layer, the hard layer (41) is a nano-scale nanodiamond particle layer, and the first toughening layer (43) is a ceramic short fiber layer.

4. The high-performance white corundum ceramic-based precision grinding wheel according to claim 3, characterized in that: The transition layer (3) is provided with a number of closed pores and is a metal-ceramic layer.

5. The high-performance white corundum ceramic-based precision grinding wheel according to claim 4, characterized in that: The toughness matrix layer (2) includes an inner high-strength ceramic layer (21) and an outer high-strength ceramic layer (25). The inner wall surface of the outer high-strength ceramic layer (25) is provided with a third toughening layer (24), and the outer wall surface of the inner high-strength ceramic layer (21) is provided with a second toughening layer (22). A metal phase toughening layer (23) is fixed between the second toughening layer (22) and the third toughening layer (24).

6. The high-performance white corundum ceramic-based precision grinding wheel according to claim 5, characterized in that: The inner high-strength ceramic layer (21) and the outer high-strength ceramic layer (25) are both alumina ceramic layers, the second toughening layer (22) and the third toughening layer (24) are both short-cut carbon fiber layers, and the metal phase toughening layer (23) is a ductile metal phase layer.

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