Metal deforming – Tool and/or tool holder – Having unitary tool-face
Reexamination Certificate
2002-07-23
2003-08-26
Jones, David B. (Department: 3725)
Metal deforming
Tool and/or tool holder
Having unitary tool-face
C072S176000, C072S456000, C029S243510, C029S275000
Reexamination Certificate
active
06609406
ABSTRACT:
FIELD OF THE INVENTION
The invention relates to a reorienting tool that simply and efficiently reorients a flange, such as a hem flange, and such hem flange in combination with an adhesive serves to make integral the outer skin of a vehicle door and a vehicle door frame, and more specifically the invention relates to a hem flange reorienting tool and method whereby as the tool is moved along the length of the hem flange, the tool contacts the flange to thereby reorient the flange in the manner required to make integral the vehicle door and frame.
BACKGROUND OF THE INVENTION
A vehicle door such as a door for a car or truck is generally comprised of a door frame and an outer door skin that is made integral with the frame at a hem flange defined by the perimeter edge of the skin. During the door assembly process, a suitable adhesive is placed proximate the peripheral door skin edge. The skin is then placed in the required position on the door frame and the desired hem flange is formed as the perimeter edge of the skin is bent around the frame and towards the frame until the flange is closely adjacent the frame. The adhesive is sandwiched between the hem flange and the frame and forms the desired bond therebetween. Finally, to ensure the requisite continuous, leakproof and tight bond is developed between the hem flange and doorframe, suitable tools such as pliers or a hammer, are used to press, crimp or otherwise force the flange further against the frame.
Over time, if the door becomes damaged or develops rust, the door panel skin must be replaced. In order to replace the skin, the hem flange is first broken using a time consuming process. This prior art process is well known to those skilled in the art. Initially during the skin replacement process a grinding wheel is applied at the flange bend and the flange is ground to a minimum thickness at the bend. During this step in the replacement process, the grinding wheel is moved along the hem flange bend until it is possible to physically separate the main skin portion from the hem. The hem flange is then manually peeled away from the door frame using a chisel. Occasionally it may be necessary to use a hand held tool such as pliers to separate the hem and skin. Finally, the skin is removed from the door frame. It may be necessary to apply an air chisel or another suitable well known manually or pneumatically actuated tool between the skin and frame to break apart the members. Any remaining dried adhesive on the frame is then removed from the frame using a solvent, sandpaper or a suitable tool.
During this prior art removal process, the frame is frequently damaged by the removal tools. Because the new skin is sized to mate with a door frame of precise dimensions, in order to ensure the required bond between the skin and frame is formed, the frame must be reformed and returned to its initial precise dimensions and configuration. Therefore, after removing the hem flange from the door frame and before the new door skin is attached to the frame, it is often necessary for a technician to manually reshape and repair the frame using a hammer and dolly in order to be able to effectively attach the new skin to the door frame. Repairing and reforming the door frame can be a time consuming and expensive process.
Once the frame and skin have been reshaped for effective mating, an adhesive is applied along the periphery of the frame and the hem flange is then bent around the frame to a location proximate the door frame so that the adhesive is sandwiched between the hem flange and door frame. The adhesive forms the desired bond between the flange and frame. The hem flange may be repositioned to a location proximate the door frame using any one or more of known manual repositioning methods such as for example, by striking the flange with a hammer and dolly. Such manual prior art repositioning techniques are time consuming, imprecise and frequently damage the door as the hem flange is struck or gripped and repositioned. Any damage sustained by the door as the joint is formed between the frame and skin must be repaired and as a result undesirably increase the time and cost to repair the door.
The foregoing illustrates limitations known to exist in present tools and methods for repairing flanges in general and more specifically flanges joining door frames and outer door skins. Thus, it is apparent that it would be advantageous to provide an alternative directed to overcoming one or more of the limitations set forth above. Accordingly, a suitable alternative for quickly and precisely repositioning a flange is provided including features more fully disclosed hereinafter.
SUMMARY OF THE INVENTION
In one aspect of the present invention this is accomplished by providing a tool for effectively and precisely reorienting a flange such as a hem flange for example. The tool reorients the flange from a first angle of orientation to a second angle of orientation and comprises a support member that further comprises a guide member; and a shoe maintained in a desired orientation by the support member. The shoe defines a reorienting surface, and the reorienting surface further comprising: a leading reorienting surface for progressively reorienting the flange to an intermediate angle of orientation between the first and second angles of orientation, and a trailing reorienting surface, the trailing reorienting surface being located proximate the guide member to define a reorienting gap therebetween, said reorienting gap adapted to permit passage of the flange therethrough, said flange being reoriented to the second angle as it exits the reorienting gap.
The progressive flange reorientation is primarily a result of the semi-frustoconical shape of the leading portion of the reorienting surface. The leading portion of the reorienting surface is tapered inwardly as it extends outwardly from the support member to a side shoe surface. The angle of taper may be between thirty and forty-five degrees.
The trailing reorienting surface is planar and is substantially parallel to the guide member. The orienting gap is of a dimension sufficient to permit the interleaved portion of the flange, door frame and outer skin to pass therebetween.
The flange reorienting tool of the present invention may be attached to a pneumatically actuated tool such as an air hammer.
According to the method of the present invention the tool contacts the flange which is oriented in an initial orientation at a first angle relative to the door skin as the tool is moved along the flange; (b) progressively urges the flange toward the skin and (c) finally reorients the flange as the flange passes through the reorienting gap. In this way, the flange is reoriented efficiently and precisely by the tool and method of the present invention.
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Gnibus Michael M.
Jones David B.
Lord Corporation
Murphy III Edward F.
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