APPARATUS AND METHOD FOR EDGE PROCESSING OF A SUBSTRATE SHEET
An apparatus for processing an edge of a substrate sheet. The apparatus includes a finishing member, a shroud, and a tubular member. The finishing member is rotatably maintained within a chamber of the shroud. The shroud includes a wall segment terminating at a major edge that defines a portion of a slot. The slot is configured to receive the edge of the substrate sheet, facilitating interface of the edge with the finishing member. The wall segment further defines a nozzle passageway that terminates at an opening in the major edge. The tubular member projects from the major edge and defines a passage in fluid communication with the nozzle passageway. Cooling agent delivered to the nozzle passageway is injected onto the finishing member via the tubular member even in the presence of vacuum induced cross-flow. In some embodiments, a spatial arrangement of the tubular member is adjustable.
This application claims the benefit of priority of U.S. Provisional Application Ser. No. 62/427,293 filed on Nov. 29, 2016 the contents of which are relied upon and incorporated herein by reference in their entirety as if fully set forth below.
BACKGROUND FieldThe present disclosure generally relates to apparatuses and methods for processing an edge of a substrate sheet. More particularly, it relates to delivery of liquid coolant with apparatuses and methods for grinding or polishing an edge of a substrate, such as the edge of a glass sheet.
Technical BackgroundProcessing glass sheets that require a high quality surface finish like the ones used in flat panel displays typically involves cutting the glass sheet into a desired shape and then grinding and/or polishing the edges of the cut glass sheet to remove any sharp corners. Grinding or polishing steps may, for example, be carried out by a finishing apparatus or machine that includes at least a finishing member (e.g., an abrasive wheel such as a grinding wheel, polishing wheel, etc.). With many such machines, the finishing member is driven (e.g., rotated), and the glass sheet is continuously conveyed so as to bring the edge to be finished into contact with the driven finishing member. The edge is machined at the point of contact. Some finishing apparatuses utilize a finishing member that simultaneously machines opposing the corners of the edge, such as a grinding wheel or polishing wheel having a groove on its outer periphery.
Due to high processing speeds and the materials involved, excessive heat is generated at the glass sheet-finishing member interface. Thus, many glass edge finishing machines incorporate a coolant system, generally designed to direct a flow of a cooling agent toward a region of the point of contact between the glass sheet and the finishing member. The cooling agent is oftentimes a liquid (e.g., water) and is sprayed or injected toward the region of the glass sheet-finishing member interface.
In addition to providing necessary cooling of the finishing member and glass sheet, the delivered cooling agent beneficially serves to wash away particles (e.g., glass chips) generated during the edge finishing process. It is desirable to collect as much of the particle-laden cooling agent as possible, both to prevent contamination of the surrounding environment as well as to re-use the cooling agent (following removal of the particles). As such, many glass edge finishing machines locate the finishing member within a shroud or housing. A vacuum source is in fluid communication with to an interior of the shroud, actively removing the particle-laden cooling agent. As a point of reference, the shroud is conventionally constructed to provide a wall or other enclosure feature in close proximity to the expected glass sheet-finishing member interface. Thus, cooling agent supply lines are typically formed within the shroud structure itself, terminating at an exit orifice or nozzle in the shroud wall and generally directed toward the expected glass sheet-finishing member interface. At normal operating pressures, the cooling agent exits the shroud orifice or nozzle as jet flow. While well-accepted, use of a shroud and vacuum can inhibit optimal delivery of the cooling agent. The shroud-generated exit orifice(s) are effectively fixed in space relative to the finishing member; although relatively close to the glass sheet-finishing member interface, the exit orifices cannot provide an optional injection direction. Also, vacuum-induced, high speed cross-flow of air can perturb and misdirect the cooling agent jet through the exerted drag force.
Accordingly, alternative apparatuses and methods for finishing an edge of a glass sheet in combination with a delivered cooling agent are disclosed herein.
SUMMARYSome embodiments of the present disclosure relate to an apparatus for processing an edge of a glass sheet. The apparatus includes a finishing member, a shroud, and a tubular member. The finishing member is configured for processing an edge of a glass sheet and is rotatably maintained within a chamber of the shroud. The shroud includes a first wall segment terminating at a first major edge and a second wall segment terminating at a second major edge. The major edges are opposite one another and combine to define at least a portion of a slot that is open to the chamber. The slot is configured to slidably receive an edge of a glass sheet, facilitating interface of the edge with the finishing member. The first wall segment further defines a nozzle passageway for delivering fluid. The nozzle passageway terminates at an opening in the first major edge. Finally, the tubular member projects from the first major edge and defines a passage in fluid communication with the nozzle passageway. With this construction, cooling fluid delivered to the nozzle passageway is precisely injected onto the finishing member via the tubular member even in the presence of vacuum induced cross-flow. In some embodiments, the tubular member terminates at a dispensing end opposite the first major edge. In some embodiments, a distance between the finishing member and the dispensing end is less than a distance between the finishing member and the first major edge. In other embodiments, a spatial arrangement of the tubular member relative to the first major edge is adjustable. In yet other embodiments, one or more additional nozzle passageways are defined in one or both of the wall segments, and one or more additional tubular members are associated with respective ones of the additional nozzle passageways.
Yet other embodiments of the present disclosure relate to an apparatus for processing an edge of a glass sheet. The apparatus includes a finishing member, a shroud, and a tubular member. The finishing member is configured for processing an edge of a glass sheet and is rotatably maintained within a chamber of the shroud. The shroud includes a wall segment terminating at a major edge that defines at least a portion of a slot that is open to the chamber. The slot is configured to slidably receive an edge of a glass sheet, facilitating interface of the edge with the finishing member. The wall segment further defines a nozzle passageway for delivering fluid. The nozzle passageway terminates at an opening in the major edge. The tubular member is removably assembled to the wall segment and projects from the major edge. The tubular member defines a passage in fluid communication with the nozzle passageway. In some embodiments, the tubular member is removably assembled to the wall segment by a threaded interface or a press fit interface.
Yet other embodiments of the present disclosure relate to a method for processing an edge of a glass sheet. The method includes directing the edge of the glass sheet through a slot in a shroud of a processing apparatus and into a chamber of the shroud. The slot is defined at least in part by a major edge of a wall segment of the shroud. The edge of the glass sheet is processed with a finishing member disposed within the chamber. During the step of processing, a stream of cooling fluid is directed onto an interface between the edge of the glass sheet and the finishing member via a tubular member projecting from the major edge. In this regard, the tubular member defines a central passage in fluid communication with a nozzle passageway defined in the wall segment. With the methods of the present disclosure, the tubular member consistently and beneficially directs the cooling fluid onto the interface. In some embodiments, methods of the present disclosure further include adjusting an arrangement of the tubular member relative to the major edge, and thus relative to the finishing member, for example to address wear of the finishing member.
Additional features and advantages will be set forth in the detailed description which follows, and in part will be readily apparent to those skilled in the art from that description or recognized by practicing the embodiments described herein, including the detailed description which follows, the claims, as well as the appended drawings.
It is to be understood that both the foregoing general description and the following detailed description describe various embodiments and are intended to provide an overview or framework for understanding the nature and character of the claimed subject matter. The accompanying drawings are included to provide a further understanding of the various embodiments, and are incorporated into and constitute a part of this specification. The drawings illustrate various embodiments described herein, and together with the description serve to explain the principles and operations of the claimed subject matter.
Reference will now be made in detail to various embodiments of apparatuses and methods for processing an edge of a substrate sheet, such an edge of a glass sheet. Whenever possible, the same reference numerals will be used throughout the drawings to refer to the same or like parts.
One embodiment of an apparatus 10 in accordance with principles of the present disclosure for processing an edge of a glass sheet is shown in in
The apparatus 10 includes a finishing member 12 and a shroud 14. As a point of reference, a portion of the shroud 14 is depicted in
The finishing member 12 can assume a wide variety of forms, and in some embodiments is an abrasive wheel (e.g., grinding wheel, polishing wheel, etc.) of a type known to those of ordinary skill to be appropriate for machining the edge of a glass sheet. By way of non-limiting example, the finishing member 12 can be a bonded wheel embedded with or carrying abrasive particles or abrasive media. In some embodiments, the finishing member 12 can form one or more grooves of a desired profile at an outer periphery thereof. The finishing member 12 can be driven (e.g., rotated) by a motor 20 that in turn is mounted to, or supported relative to, the shroud 14.
The shroud 14 can assume a wide variety of formats, and in some embodiments can include a cover 30 and a base 32 combining to define the chamber 16. With this optional configuration, the cover 30 can be pivotably mounted to the base 32, such as by a hinge 34, to provide selective access to the chamber 16 (e.g.,
Regardless of an exact construction, and as reflected by
As shown in the greatly simplified cross-sectional view of
The slot 40 can be formed by the shroud 14 in a variety of fashions. In some embodiments, the shroud 14 can be viewed as including or defining first and second wall segments 50, 52 that combine to form a perimeter of at least a portion of the slot 40. The first and second wall segments 50, 52 can be provided in different forms; for example, the first wall segment 50 can be part of or attached to the cover 30 (
The shroud wall segments 50, 52 are shown in greater detail in
The second and third nozzle passageways 90b, 90c of the first wall segment 50 can be substantially identical to the first nozzle passageway 90a as described above, with the second nozzle passageway 90b terminating at a second opening 100b in the first major edge 60 and the third nozzle passageway 90c terminating at a third opening 100c in the first major edge 60. The nozzle passageways 90a-90c of the first wall segment 50 are spaced apart from one another. Due to the optionally curved shape of the first major edge 60 in an X-Y plane, the openings 100a-100c can be radially off-set from one another along a curvature of the first major edge 60 in the X-Y plane, such that centerlines CL1-CL3 of the respective openings 100a-100c, and thus a spray direction effectuated by each of the openings 100a-100c, generally intersect at a center of the finishing member 12 as represented by
With continued reference to
With specific reference to
In some embodiments, a tubular member is provided for each of the nozzle passageway openings associated with the shroud 14 (
The tubular members 110a-110c, 112a-112c can be similar in some embodiments, such that the following explanations with respect to the first tubular member 110a as shown in
The tubular member 110a is a tubular body defining a central passage 120a that is open to opposing, inlet and dispensing ends 122a, 124a. The tubular member 110a is associated with the first wall segment 50 such that the tubular member 110a projects from the first major edge 60, and the central passage 120a is in fluid communication with the first nozzle passageway 90a via the inlet end 122a. For example, the inlet end 122a can be inserted into the first nozzle passageway 90a via the opening 100a (referenced generally) (e.g., an outer diameter of the tubular member 110a approximates a diameter of the opening 100a). Alternatively, the inlet end 122a can be assembled on to a face of the first major edge 60, with the central passage 120a aligned with the opening 100a. Assembly or mounting of the tubular member 110a to the first wall segment 50 can be achieved in various manners as will be apparent to those of ordinary skill including, but not limited to, threaded interface, press fit, adhesive bond, weld, etc. In related embodiments, the tubular member(s) (such as the tubular member 110a) of the present disclosure can be assembled or retrofitted to an existing glass edge processing apparatus. A gasket or other sealing component (not shown) can optionally be provided to better promote a fluid tight seal at an interface between the first wall segment 50 and the tubular member 110a. In yet other embodiments, the tubular member 110a is an integrally formed component of the first wall segment 50. Regardless, the tubular member 110a effectively extends the nozzle passageway 90a beyond the opening 100a in the first major edge 60, with pressurized fluid delivered to the nozzle passageway 90 exiting from the dispensing end 124a. While the tubular member 110a is shown as being generally linear or straight, in other embodiments, a curved or curvilinear shaped geometry can be provided, a non-limiting example of which is shown for the tubular member 80′ of
Returning to
An additional benefit evidenced by comparison of
Returning to
In other embodiments, the apparatuses of the present disclosure can be configured to automatically adjust or change a spatial orientation of the tubular member(s). For example,
The shroud 202 can have any of the formats or features described above with respect to the shroud 14 (
The tubular member 204 is connected to and in fluid communication with the nozzle passageway 226 via an opening in the major edge 222, and defines a central passage 230 open to a dispensing end 232. With the embodiment of
In addition or as an alternative to providing for extension and retraction, the tubular member 204 and/or a connection format between the tubular member 204 and the wall segment 220 can be configured to permit transverse deflection or articulation of the dispensing end 232 relative to the major edge 222. For example, a hinged or pivoting connection (e.g., a ball joint) can be established between the tubular member 204 and the wall segment 220. Alternatively or in addition, the tubular member 204 can be comprised of multiple components or sections that are pivotably connected to one another, are flexible, etc. Regardless, the tubular member 204 can be articulated to deflect the dispensing end 232 in any transverse direction relative to the major edge 222 as generally indicated by the arrow “T” in
Returning to
The controller 208 can be or include a computer or computer-type device (e.g., programmable logic controller). The controller 208 can include a processor and a memory communicatively coupled to the processor. A computer readable instruction set may be stored in the memory and, when executed by the processor, provide instructions to at least the actuator 206, thereby modifying a spatial position of the dispensing end 232 relative to the major edge 222. The controller 208 is optionally programmed (e.g., hardware, software, electrical circuitry components, etc.) to prompt operation of the actuator 206 in a pre-determined fashion. For example, the controller 208 can be programmed to prompt the actuator 206 to extend or retract the tubular member 204 in a pre-determined manner based upon a particular format (e.g. size, number of grooves, etc.) of the finishing member, based upon expected or sensed wear of the finishing member, etc. In some embodiments, the controller 208 can be programmed with one or more algorithms and/or look-up tables that correlate a pre-determined spatial position of the dispensing end 232 relative to the major edge 222 with operation time of the finishing member (e.g., when a new finishing member is first installed, the algorithm(s) and and/or look-up table(s) identifies a first spatial position of the dispensing end 232; after a first time period in which the finishing member is used to finish substrates edges, the algorithm(s) and/or look-up table(s) identifies a second spatial position of the dispensing end 232 that is generally further from the major edge 222 as compared to the first spatial position; after a subsequent second time period in which the finishing member is further used to finish substrate edges, the algorithm(s) and/or look-up table(s) identifies a third spatial position of the dispensing end 232 that is generally further from the major edge 222 as compared to the second spatial position, etc.). In other embodiments, the controller 208 can include or consist of a user input device at which a user can select a desired spatial arrangement of the tubular member 204. The controller 208 can be electronically connected to the actuator 206 by wired or wireless connection. In some embodiments, the controller 208 can be a controller operating to control other operations of the apparatus 200 and/or of a finishing system to which the apparatus 200 is installed.
Returning to
Various modifications and variations can be made the embodiments described herein without departing from the scope of the claimed subject matter. Thus it is intended that the specification cover the modifications and variations of the various embodiments described herein provided such modifications and variations come within the scope of the appended claims and their equivalents.
Claims
1. An apparatus for processing an edge of a substrate sheet, the apparatus comprising:
- a finishing member for processing the edge of the substrate sheet;
- a shroud defining a chamber within which the finishing member is rotatably maintained, the shroud including: a first wall segment terminating at a first major edge, a second wall segment terminating at a second major edge opposite the first major edge, wherein the first and second major edges combine to define at least a portion of a slot open to the chamber and configured to slidably receive the edge of the substrate sheet for interfacing with the finishing member, and further wherein the first wall segment defines a first nozzle passageway for delivering fluid, the first nozzle passageway terminating at a first opening in the first major edge; and
- a first tubular member projecting from the first major edge and defining a passage in fluid communication with the first nozzle passageway.
2. The apparatus according to claim 1, wherein the first tubular member is configured to direct a flow of a cooling agent from the first nozzle passageway onto the finishing member.
3. The apparatus according to claim 1, wherein the first tubular member terminates at a dispensing end opposite the first major edge, and a distance between the dispensing end and the finishing member is less than a distance between the first major edge and the finishing member.
4. The apparatus according to claim 1, wherein the first wall segment further defines opposing exterior and interior faces, and the first major edge extends between and adjoins the exterior and interior faces.
5. The apparatus according to claim 4, wherein the first nozzle passageway is defined in a thickness of the first wall segment between the exterior and interior faces.
6. The apparatus according to claim 1, wherein the first major edge is chamfered relative to a remainder of the first wall segment.
7. The apparatus according to claim 1, wherein an arrangement of the first tubular member relative to the first major edge is adjustable.
8. The apparatus according to claim 7, further comprising an actuator linked to the first tubular member and configured to adjust the first tubular member relative to the first major edge.
9. The apparatus according to claim 1, wherein the first tubular member is removably assembled to the first wall segment.
10. The apparatus according to claim 1, wherein a second nozzle passageway for delivering fluid is defined in the first wall segment, the second nozzle passageway spaced apart from the first nozzle passageway and terminating at a second opening in the first major edge, the apparatus further comprising a second tubular member projecting from the first major edge and defining a passage in fluid communication with the second opening.
11. The apparatus according to claim 1, wherein a second nozzle passageway for delivering fluid is defined in the second wall segment, the second nozzle passageway terminating at a second opening in the second major edge, the apparatus further comprising a second tubular member projecting from the second major edge and defining a passage in fluid communication with the second opening.
12. The apparatus according to claim 1, wherein the shroud further defines an exhaust passage in fluid communication with the chamber for removing contaminants therefrom in the presence of a vacuum applied to the exhaust passage.
13. An apparatus for processing an edge of a substrate sheet, the apparatus comprising:
- a finishing member for processing the edge of the substrate sheet;
- a shroud defining a chamber within which the finishing member is rotatably maintained, the shroud including: a wall segment terminating at a major edge thereof, the major edge defining at least a portion of a slot open to the chamber and configured to slidably receive the edge of the substrate sheet for interfacing with the finishing member, the wall segment defining a nozzle passageway for delivering fluid, the nozzle passageway terminating at an opening in the major edge; and
- a tubular member removably assembled to the wall segment and projecting from the major edge, the tubular member defining a passage in fluid communication with the nozzle passageway.
14. The apparatus according to claim 13, wherein the tubular member is removably assembled to the wall segment by at least one of a threaded connection and a press fit connection.
15. A method for processing an edge of a substrate sheet, the method comprising:
- directing the edge of the substrate sheet through a slot in a shroud of a processing apparatus and into a chamber of the shroud, the slot is defined at least in part by a major edge of a wall segment of the shroud;
- processing the edge of the substrate sheet with a finishing member disposed within the chamber; and
- during the step of processing, directing a stream of cooling agent onto an interface between the edge of the glass sheet and the finishing member via a tubular member projecting from the major edge, the tubular member defining a central passage in fluid communication with a nozzle passageway defined in the wall segment.
16. The method according to claim 15, further comprising adjusting an arrangement of the tubular member relative to the major edge.
17. The method according to claim 16, wherein the step of adjusting includes altering a distance between a dispensing end of the tubular member and the major edge.
18. The method according to claim 16, wherein the step of adjusting includes altering an angular relationship of a central axis of the tubular member relative to the major edge.
19. The method according to claim 16, wherein the step of adjusting includes:
- monitoring wear of the finishing member; and
- altering a spatial arrangement of the tubular member relative to the major edge based upon wear of the finishing member.
20. The method according to claim 19, wherein the step of monitoring is performed by a computing device operating on software programmed to prompt a change in the spatial arrangement of the tubular member relative to the major edge.
Type: Application
Filed: Nov 29, 2017
Publication Date: Sep 26, 2019
Inventors: James William Brown (Painted Post, NY), Weiming Li (Katy, TX), Elias Panides (Horseheads, NY)
Application Number: 16/463,618