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KR-102962394-B1 - Reusable hub assembly for abrasive articles

KR102962394B1KR 102962394 B1KR102962394 B1KR 102962394B1KR-102962394-B1

Abstract

A method for providing damping during a grinding operation is provided. The method comprises the step of removably coupling a grinding wheel to a hub. The grinding wheel has an outer circumference and an inner circumference. A layer of abrasive material extends between the inner circumference and the outer circumference. The method also comprises the step of grinding a work surface by contacting a grinding disc to the work surface. The hub comprises a housing and a plurality of damping units within the housing. The plurality of damping units are shaped to reduce vibration during a grinding operation.

Inventors

  • 베이어만 브렛 에이
  • 기봇 마이켄
  • 리파우트 쟝-뤽

Assignees

  • 쓰리엠 이노베이티브 프로퍼티즈 컴파니

Dates

Publication Date
20260507
Application Date
20211025
Priority Date
20201028

Claims (20)

  1. As a method of providing damping during a grinding operation, Step of detachably coupling a grinding wheel to a hub - said grinding wheel has an outer circumference and an inner circumference, and a layer of abrasive material extends between said inner circumference and outer circumference -; and The method includes the step of polishing the work surface by bringing the polishing wheel into contact with the work surface; The above hub is, A housing configured to define the hub and to connect the hub to the grinding wheel on the outer edge of the hub and to the machine shaft on the inner edge of the hub; and It includes a plurality of damping units within the above housing; A method in which the above plurality of damping units are shaped to reduce vibration during a grinding operation.
  2. A method according to claim 1, wherein the damping unit comprises a metal, plastic, ceramic, rubber, polymer, resin, or fiber-reinforced composite.
  3. A method according to claim 1 or 2, wherein the hub includes a disconnection feature.
  4. A method according to claim 1 or 2, wherein the grinding wheel is removablely coupled to the hub.
  5. A method according to claim 1 or 2, wherein the hub comprises a first part and a second part, and the joining step comprises joining the first part to the second part such that the grinding wheel is between the first part and the second part.
  6. As a hub for abrasive articles, A housing configured to define the hub and to connect the hub to the grinding article on the outer edge of the hub and to the machine shaft on the inner edge of the hub; and The system includes a vibration damping system within the housing, and the system, It includes a plurality of damping units, each having a shaped structure to reduce vibration; Each of the above plurality of damping units is a hub located within the housing.
  7. In paragraph 6, the hub is a hub that is removably coupled to the abrasive article.
  8. In claim 6 or 7, the hub is a hub that is releaseably coupled to the machine shaft.
  9. In paragraph 6, the structure further comprises a reinforcing material, and the reinforcing material comprises a rigid material different from the structural material forming the structure, a hub.
  10. In paragraph 6 or 7, A hub further comprising a disconnection feature configured to separate the above-mentioned grinding article from the machine shaft.
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Description

Reusable hub assembly for abrasive articles A bonded grinding wheel is typically provided with an attachment mechanism for connecting to a grinding system. The attachment mechanism may generally include a cylindrical aperture bushing. A disc-shaped flange extends radially from the middle portion of the bushing and terminates at a peripheral lip. The bushing extends through the center bore of the wheel and is adapted so that the lip engages with the support surface of the wheel near the outermost circumference of the recessed center. The grinding face end of the bushing extends radially outward to engage with the front grinding face of the wheel and mechanically captures the wheel between the grinding face end and the flange. The flange, lip, and support surface form a cavity in which an epoxy resin is disposed to chemically bond the hub to the wheel. A method for providing damping during a grinding operation is provided. The method comprises the step of removably coupling a grinding wheel to a hub. The grinding wheel has an outer circumference and an inner circumference. A layer of abrasive material extends between the inner circumference and the outer circumference. The method also comprises the step of grinding a work surface by contacting a grinding disc to the work surface. The hub comprises a housing and a plurality of damping units within the housing. The plurality of damping units are shaped to reduce vibration during a grinding operation. The system and method of this specification provide a significant reduction in waste compared to modern hubs for grinding systems. The system of this specification allows for a saving of up to 30% in the volume of grinding discs that are available for grinding and are not discarded. Additionally, the system of this specification provides a hub that is reusable for multiple grinding discs and reduces waste. The system and method of this specification also provide improved damping of vibrations caused by grinding operations. Additionally, due to the improved damping of vibrations caused partially during grinding operations, better cutting consistency is provided using the hub exemplified in this specification. In drawings that are not necessarily drawn to a fixed scale, similar reference numerals may indicate similar components in different drawings. The drawings generally illustrate the various embodiments discussed in this document as examples, not limitations. FIGS. 1a and 1b illustrate a depressed center grinding wheel that does not have a metal hub and has one. FIGS. 2a and 2b illustrate cross-sectional views of a reusable hub assembly according to an embodiment of the present specification. FIGS. 3a to 3d illustrate internal drawings of a reusable hub assembly according to an embodiment of the present specification. FIGS. 4a to 4l illustrate damping features for a reusable hub assembly according to an embodiment of the present specification. FIG. 5 illustrates a block diagram illustrating the components of a reusable hub according to an embodiment of the present specification. FIG. 6 illustrates a method of using a reusable hub according to an embodiment of the present specification. FIG. 7 illustrates a method for grinding a workpiece according to an embodiment of the present specification. Figure 8 illustrates a method for manufacturing a reusable hub using an additive manufacturing technique. FIGS. 9 to 18 illustrate damping structures and related analyses discussed in more detail in the embodiments. A center-recessed grinding wheel is an example of an abrasive article that can be used for grinding operations. Many grinding wheels are used with a hub for mounting to a grinding assembly. FIG. 1a illustrates an exemplary center-recessed grinding wheel of the prior art, and FIG. 1b illustrates such a wheel with a metal hub attached. U.S. Patent No. 5,895,317, granted on April 20, 1999, describes a hub assembly of the prior art for abrasive articles, specifically, a center-recessed grinding wheel as illustrated in FIGS. 1a and 1b. Typically, the hub is attached to the wheel using adhesive. The hub overlaps a portion of the surface of the abrasive article, at least on the side where it is bonded. Unfortunately, this means that the user can only grind up to the edge of the hub, and the outer diameter decreases until the wheel becomes too small to use. As the wheel diameter decreases significantly, the radial speed of the wheel decreases significantly, and performance deteriorates. Particularly in the case of center-recessed grinding wheels, the "center-recessed" portion of the wheel is often discarded by the user. The discarded portion may constitute a significant fraction of the total material. For example, more than 30% of the 4.5" outer diameter CII DCGW is often in the discarded center recessed section. Additionally, because the hub is discarded, it is not reusable. It is desirable to reduce the amount of wasted abrasive material due to concerns regarding both