A lock and pin for the structural and fluid tight repair of cracks not amenable to high temperature repairs or synthetic material patches. Fluid tight pins and locks seal the crack while one or more locks prevent the crack from growing. These repairs need to endure the remaining life cycle of the machinery part while withstanding all the strain, pressure, heat and expansion and contraction of the part before the crack(s) were formed. Often these cracks evolved due to engineering design flaws that will require even greater strength from these areas than when new.

A center locator is operated with a hole center for enlarging a round opening and includes a center seat having a through hole centrally defined therein, wherein the through hole is adapted to allow a centering drill of the hole cutter extending through the center seat. At least one adjusting device is longitudinally mounted to the center seat and formed with an engaging portion, wherein the at least one adjusting device is expandable relative to the center seat for adjusting a distance between the engaging portion of the at least one adjusting device and a center of the center seat.

A fastener for fastening a drill jig to overlapping work pieces and clamping the overlapping work pieces for facilitating accurate drilling of the overlapping work pieces including a fastener body and a damper assembly operatively connected to the fastener body. The damper assembly is configured to enable application of a first load to the drill jig, and the fastener body is configured to enable application of a second load to the overlapping work pieces when the fastener fastens the drill jig to the overlapping work pieces. The first load is less than the second load. The first load is sufficient to hold the drill jig to the overlapping work pieces during drilling but without causing significant deformation of the drill jig. The second load is sufficient to reduce the formation of burrs during drilling of a hole through the overlapping working pieces.

A fastener for fastening a drill jig to overlapping work pieces and clamping the overlapping work pieces for facilitating accurate drilling of the overlapping work pieces including a fastener body and a damper assembly operatively connected to the fastener body. The damper assembly is configured to enable application of a first load to the drill jig, and the fastener body is configured to enable application of a second load to the overlapping work pieces when the fastener fastens the drill jig to the overlapping work pieces. The first load is less than the second load. The first load is sufficient to hold the drill jig to the overlapping work pieces during drilling but without causing significant deformation of the drill jig. The second load is sufficient to reduce the formation of burrs during drilling of a hole through the overlapping working pieces.

A lock and pin for the structural and fluid tight repair of cracks not amenable to high temperature repairs or synthetic material patches. Fluid tight pins and locks seal the crack while one or more locks prevent the crack from growing. These repairs need to endure the remaining life cycle of the machinery part while withstanding all the strain, pressure, heat and expansion and contraction of the part before the crack(s) were formed. Often these cracks evolved due to engineering design flaws that will require even greater strength from these areas than when new.

A fixturing device for attaching attached to a work piece and methods of attaching the fixturing device to the work piece. The device may include a body, a base, and an extension. The extension may extend outward from the body and is sized to initially be positioned within an opening in the work piece. The extension may be expandable in size to engage with a backside of the work piece at the opening to secure the device to the work piece. The device further includes an interface for receiving to a tool that performs an operation on the work piece.

A match drilling tool comprising a body comprising a drilling leg and a fixing leg, said drilling leg being separated from said fixing leg by a gap, wherein said drilling leg defines a cutter guide opening, and wherein said fixing leg defines an alignment pin opening, said alignment pin opening being concentric with said cutter guide opening; and an alignment pin slideably received in said alignment pin opening.

A fixturing device for attaching attached to a work piece and methods of attaching the fixturing device to the work piece. The device may include a body, a base, and an extension. The extension may extend outward from the body and is sized to initially be positioned within an opening in the work piece. The extension may be expandable in size to engage with a backside of the work piece at the opening to secure the device to the work piece. The device further includes an interface for receiving to a tool that performs an operation on the work piece.

A match drilling tool comprising a body comprising a drilling leg and a fixing leg, said drilling leg being separated from said fixing leg by a gap, wherein said drilling leg defines a cutter guide opening, and wherein said fixing leg defines an alignment pin opening, said alignment pin opening being concentric with said cutter guide opening; and an alignment pin slideably received in said alignment pin opening.

A precise manufacturing method for manufacturing a liquid container is described hereinafter. Assemble a first jig element with a second jig element. Make a first datum plane at the first jig element, and make a second datum plane at the second jig element, next, unlock the first jig element and the second jig element. Assemble a base with the first jig element, assemble a cup-shaped element with the second jig element. Make a through hole at the cup-shaped element, and the through hole is corresponding to the second datum plane, make an assembling portion at the base, and the assembling portion together with a perforation is corresponding to the first datum plane. Detach the second jig element, detach the first jig element, and then the cup-shaped element is assembled with the base, so the perforation and the through hole are located at the same direction.