Patent Application
20170021402
This document relates generally to wire cleaning devices, and more specifically to a multi segment device used to scrape debris from metal wire.
It is well known that the process of forming metal wire, commonly referred to as wire drawing, uses lubricants. Wire drawing is a metalworking process used to reduce across-section of a wire by pulling the wire through a single, or series of, drawing die(s). The process for drawing wire is relatively simple. First, the wire is prepared by shrinking a first end by hammering, filing, rolling or swaging, so that the wire will fit through the die. Second, the wire is pulled through the die. As the wire is pulled through the die, a volume of the wire remains the same. So, as the diameter of the wire decreases, the length of the wire increases.
Lubrication in the drawing process is essential for maintaining a good surface finish and extending the useful life of the (Refs). Different methods of lubrication include, for example, wet drawing where the die(s) and wire are completely immersed in lubricant, dry drawing where the wire passes through a container of lubricant which coats the surface of the wire, and metal coating where the wire is coated with a soft metal which acts as a solid lubricant. The lubricants can include, for example, liquid lubricants such as an oil or copper (II) sulfate solution, or dry film lubricants among many others. Regardless of the type of lubricant utilized in the wire drawing process used to form the metal wire, lubricants can attract debris which adheres to the wire. Processes utilizing the metal wire which are sensitive to such debris can be negatively affected by the presence of the debris. One such process is the manufacturing of vehicles.
Accordingly, a need exists for a simple and inexpensive way to overcome issues related to the use of lubricants in the wire drawing process used to form metal wire. Ideally, the debris adhered to the metal wire due to the presence of the lubricant can be stripped from the metal wire. It would be desirable if a device could be utilized to strip the debris from the metal wire. Even more, it would be desirable if the metal wire being striped did not require threading through the stripping device.
In accordance with the purposes and benefits described herein, a device for removing debris from a metal wire formed by a process utilizing a lubricant includes at least two segments forming a passage through which the metal wire passes, each of the at least two segments having a leading edge for stripping debris from the metal wire, and a resilient member positioned around the at least two segments and applying a force to the at least two segments sufficient to cause contact between the leading edges and the metal wire passing through the passage.
In one possible embodiment, the at least two segments form a substantially tubular passage. In another possible embodiment, the leading edge of each of the at least two segments substantially conforms to an outer diameter of the wire.
In still another possible embodiment, an inner surface of each of the at least two segments substantially conforms to an outer diameter of the wire. In yet another, the inner surface of each of the at least two segments is a wear resistant material attached to each of the at least two segments.
In another possible embodiment, the leading edge for stripping debris from the metal wire is in the shape of one of a small radius, a large radius, substantially no radius, a positive break, or a negative break.
In still another possible embodiment, the metal wire includes an outer protective coating and the force applied to the at least two segments is insufficient to scrape the outer protective coating from the wire.
In still yet another possible embodiment, the resilient member is one of a spring clamp, a snap ring, an O-ring, a spring, or an elastic band. In another, first and second ends of the resilient member are connected to create the force applied to the at least two segments.
In a second possible embodiment, a device for removing debris from a metal wire formed by a process utilizing a lubricant, includes at least two segments forming a passage through which the metal wire passes, each of the at least two segments having a leading edge for stripping debris from the metal wire, and first and second side edges, and a resilient member positioned around and applying a force to the at least two segments. In this embodiment, a first side edge of a first segment is connected to a second side edge of a second segment and a gap between a second edge of the first segment and a first edge of the second segment opens wide enough to allow the metal wire to pass therethrough for positioning of the metal wire within the passage.
In another possible embodiment, the force applied by the resilient member closes the gap after the metal wire is positioned within the passage and causes contact between at least the leading edges of the at least two segments and the metal wire passing through the passage.
In still another possible embodiment, the first side edge of the first segment and the second side edge of the second segment are hingedly connected.
In yet another possible embodiment, the leading edge of each of the at least two segments substantially conforms to an outer diameter of the wire.
In a third possible embodiment, a method of removing debris from a metal wire formed by a process utilizing a lubricant, includes the steps of: moving the metal wire through a passage formed by a plurality of segments; contacting the metal wire moving through the passage using a leading edge of each of the plurality of segments; and applying a force to the plurality of segments to cause contact between the leading edge of each of the plurality of segments and the metal wire passing through the passage.
In another possible embodiment, the method further includes the step of moving the metal wire through at least one straightener following the step of moving the metal wire through the passage formed by the plurality of segments.
In still another possible embodiment, the moving step includes pulling the metal wire from a roll of metal wire through the at least one straightener and the passage formed by the plurality of segments.
In yet another possible embodiment, the passage formed by the plurality of segments is fixed in position such that the metal wire moving through the passage is moving substantially horizontal.
In yet still another possible embodiment, the method further includes the step of collecting the debris removed from the metal wire in a container positioned beneath the leading edges of the plurality of segments.
In the following description, there are shown and described several embodiments of a device and related method for removing debris from a metal wire formed by a process utilizing a lubricant. As it should be realized, the devices and methods are capable of other, different embodiments and their several details are capable of modification in various, obvious aspects all without departing from the methods and assemblies as set forth and described in the following claims. Accordingly, the drawings and descriptions should be regarded as illustrative in nature and not as restrictive.
The accompanying drawing figures incorporated herein and forming a part of the specification, illustrate several aspects of the device and method and together with the description serve to explain certain principles thereof. In the drawing figures:
Reference will now be made in detail to the present preferred embodiments of the device and related method for removing debris from a metal wire formed by a process utilizing a lubricant, examples of which are illustrated in the accompanying drawing figures, wherein like numerals are used to represent like elements.
Reference is now made to
In the described embodiment, an inner surface 18 of each of the three segments 12 substantially conforms to the outer diameter of the metal wire (W). In one alternate embodiment shown in
As further shown in
A resilient member 20 (e.g., an elastic band) is positioned around the three segments 12 and applies a force thereto. The force is sufficient to cause contact between the leading edges 16 and the metal wire (W) passing through the passage 14. While contact between the leading edges 16 and the metal wire is desired, too much force resulting in scraping and/or deforming the metal wire is not. This is particularly true in instances where the metal wire includes an outer protective coating to prevent rust or provide some other function. In these instances, the force applied to the leading edges must be enough to strip debris from the metal wire but not enough to scrape the outer protective coating from the metal wire.
Although the resilient member 20 is described as an elastic band, the resilient member could be a spring or like device so long as the spring or like device is sufficient to apply the force. For example, the resilient member could be a spring, an O-ring, a snap ring, or a spring clamp, etc. Each type of resilient member 20 could slide over an end 22 of the device 10 or could wrap around the device. If wrapped around the device, the resilient member may include a connector (not shown) to connect first and second ends of the resilient member (e.g., snap ring ends) together, or the first and second ends could be tied together (e.g., elastic bands) or otherwise bound. Even more, the resilient member 20 could include one or more resilient members (e.g., two springs, or a snap ring and a spring, etc.)
In another alternate embodiment, the three segments 12 may be replaced with two or more segments similarly shaped to form the passage 16 through which the metal wire (W) passes. As indicated above, each segment includes a leading edge 14 for stripping debris, and shaped to conform to a portion of the outer diameter of the metal wire (W). The closer the leading edges come to approximating the outer diameter of the metal wire, the more efficient the leading edges will be at stripping debris. Even more, the smaller the gaps 24 between segments, the more efficient the stripping.
In the alternate embodiment shown in
In other words, the segments forming the device are connected one to another except for a gap between edges of two of the segments, whether there are two segments or eight segments, in a clam shell type manner. In this manner, the gap between edges can be widened by temporarily overcoming the force of the resilient member (or positioning the wire within the passage of the device before positioning the resilient member) to allow the metal wire to pass therethrough for positioning of the metal wire within the passage.
The steps utilized in the method of the described embodiment are described with reference to
In accordance with the method of removing debris from a metal wire formed by a process utilizing a lubricant, metal wire 60 is moved through a passage 70 of a device 72 formed by a plurality of segments 74. As shown by action arrows A, the metal wire 60 is pulled from a spool 76 hung from a spool rack 78. In alternate embodiments, the metal wire could be pulled from a barrel or a spool positioned on a floor or otherwise.
In a next step, a leading edge 80 of each of the plurality of segments 74 contacts the metal wire 60 moving through the passage 70 of the device 72. A force is applied, in another step, to the plurality of segments 74 by a resilient member 76 to cause the contact between the leading edge of each of the plurality of segments and the metal wire. A container 82 is provided for collecting the debris removed from the metal wire 60.
In the described embodiment, the container 82 is positioned beneath the leading edges 80 of the plurality of segments 74 where contact with the wire 60 occurs. In this arrangement, the metal wire 60 is pulled in a direction horizontal to the floor (F) allowing the debris to fall into the container (show by action arrow B) and not onto or into other element used in the process. Although not optimal, the wire may also be pulled in a vertical or angled direction as well.
Following the step of moving the metal wire through the passage formed by the plurality of segments, the wire 60 is moved, or pulled, through at least one wire straightener 84. Positioning the wire straightener 84 downstream of the device 72 minimizes the buildup of debris from the metal wire 60 within the wire straightener 84 as the debris is generally removed by moving the wire through the passage. Of course, in alternate embodiments, the wire straightener could be positioned upstream of the passage.
In the described embodiment, the passage 70 formed by the plurality of segments 74 is fixed in position through abutment with the straightener 84. As the metal wire 60 is pulled through the passage 70 and the straightener 84, the device 72 is similarly pulled by friction created through contact between the metal wire 60 and the plurality of segments 74 toward the straightener. As the straightener 84 is fixed in a stationary position, the device 72 is likewise stationary. As described above, the metal wire 60 is pulled in a direction horizontal to the floor (F) in the described arrangement.
Upon exiting the straightener 84, the wire 60 is pulled through a flexible tube 86 or conduit toward the spray head 64. In the described embodiment, an electric drive 88 using pinch rollers within the spray head 64 is used to pull the metal wire 60 from the roll 76, through the device 72 and wire straightener 84 and into the spray head. An external drive may be used, in an alternate embodiment, to pull the metal wire. For example, any pneumatic, hydraulic, or electric drive can be used to move or pull the metal wire. Within the spray head 64, the metal wire 60 is melted and sprayed on a surface (S) of a part (P) as generally described above with regard to the thermal spraying process. The flexible tube 86 or conduit maintains the metal wire 60 in a debris free state after the device 72 has stripped debris from the metal wire.
In summary, numerous benefits result from the method of method of removing debris from a metal wire formed by a process utilizing a lubricant, are illustrated in this document. The method is capable of providing a simple and inexpensive way to overcome issues related to the use of lubricants in the wire drawing process used to form metal wire. In this instance, the debris adhered to the metal wire due to the presence of the lubricant can be stripped from the metal wire using a simple device. Even more, the stripping device is designed in one embodiment such that the metal wire being stripped is not required to be threading through the device.
The foregoing has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the embodiments to the precise form disclosed. Obvious modifications and variations are possible in light of the above teachings. All such modifications and variations are within the scope of the appended claims when interpreted in accordance with the breadth to which they are fairly, legally and equitably entitled.
