A novel drill jig includes an edge alignment guide, a hole-spacing assembly, a second guide, a biasing member, and an actuator. The edge alignment guide is configured to abut an edge of a workpiece to facilitate movement of the workpiece along a first straight line. The hole-spacing assembly includes a protrusion disposed to engage a preexisting hole in a workpiece positioned by the edge alignment guide. The second guide is coupled to the hole-spacing assembly and is configured to facilitate movement of the hole-spacing assembly along a second straight line perpendicular to the first straight line. The first biasing member is coupled to the hole-spacing assembly and is operative to exert a force on the hole-spacing assembly in a direction parallel to the second straight line. An actuator moves the hole-spacing assembly along the second straight line via the first biasing member.

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 method includes drilling a first aperture in a panel that extends between a panel first surface and a panel second surface. The first aperture projects into the panel along a first centerline from the panel first surface. The first centerline is angularly offset from the panel first surface by a first angle. A first tool is arranged with the panel. The first tool includes a support structure, a locator and a drill guide. The locator is mounted to the support structure and projects into the first aperture. The drill guide is mounted to the support structure and is arranged adjacent the panel second surface. A second aperture is drilled in the panel using the drill guide. The second aperture projects into the panel along a second centerline from the panel second surface to the first aperture. The second centerline is coaxial with the first centerline.

An in-situ square sample acquisition device and method for a bond contact test of a surrounding rock and a shotcrete layer are provided, the device includes a supporting shell, a fixing structure, hollow adjusting bolts and two borehole positioning frames, a guide hole is provided in a middle of the supporting shell, the frames are slidably fit in the guide hole, a plurality of positioning holes are provided in side walls of each of the frames, and the positioning holes in different frames are distributed in a staggered manner, four corners of the supporting shell are connected with four hollow adjusting bolts respectively, one end of each of the hollow adjusting bolts is fixedly provided with an adjusting nut, four fixing lugs are provided in four corners of each frame respectively, and the fixing structure includes four connecting bolts and four nuts.

A novel drill jig includes an edge alignment guide, a hole-spacing assembly, a second guide, a biasing member, and an actuator. The edge alignment guide is configured to abut an edge of a workpiece to facilitate movement of the workpiece along a first straight line. The hole-spacing assembly includes a protrusion disposed to engage a preexisting hole in a workpiece positioned by the edge alignment guide. The second guide is coupled to the hole-spacing assembly and is configured to facilitate movement of the hole-spacing assembly along a second straight line perpendicular to the first straight line. The first biasing member is coupled to the hole-spacing assembly and is operative to exert a force on the hole-spacing assembly in a direction parallel to the second straight line. An actuator moves the hole-spacing assembly along the second straight line via the first biasing member.

A novel drill jig includes an edge alignment guide, a hole-spacing assembly, a second guide, a biasing member, and an actuator. The edge alignment guide is configured to abut an edge of a workpiece to facilitate movement of the workpiece along a first straight line. The hole-spacing assembly includes a protrusion disposed to engage a preexisting hole in a workpiece positioned by the edge alignment guide. The second guide is coupled to the hole-spacing assembly and is configured to facilitate movement of the hole-spacing assembly along a second straight line perpendicular to the first straight line. The first biasing member is coupled to the hole-spacing assembly and is operative to exert a force on the hole-spacing assembly in a direction parallel to the second straight line. An actuator moves the hole-spacing assembly along the second straight line via the first biasing member.

Said drilling grid comprises a main body designed to be attached to an aircraft structural part and having through-holes for positioning a machine for drilling the aircraft structural part. It further comprises a wireless communication device configured to communicate with a supervision system and a data processing unit designed to send to the supervision system, via the wireless communication device, information relating to the drilling grid and/or the drilling machine positioned in one of the positioning holes.

Said drilling grid comprises a main body designed to be attached to an aircraft structural part and having through-holes for positioning a machine for drilling the aircraft structural part. It further comprises a wireless communication device configured to communicate with a supervision system and a data processing unit designed to send to the supervision system, via the wireless communication device, information relating to the drilling grid and/or the drilling machine positioned in one of the positioning holes.

A flexible corner fitting configured to contribute to a connection between at least three walls of at least one aircraft box structure, and to make them leaktight with respect to liquids. The corner fitting has at least three fixing plates and at least three edge corners made of flexible material. Each of the at least three fixing plates is connected to each of the other at least three fixing plates by one of the edge corners made of flexible material. The edge corners made of flexible material ensure adjustment of the corner fitting without machining or the addition of shims.

A pocket hole jig system is formed of a plurality of jig segments, wherein each jig segment includes a main body having a drill guide and a lock feature that protrudes outward on a first side of the main body and a recess that protrudes inward on a second side of the main body. The system also includes one or more spacers that have a main body of varying width and a lock feature that protrudes outward on a first side of the main body and a recess that protrudes inward on a second side of the main body. Jig segments and spacers may be connected together by inserting the lock feature of a jig segment or spacer into the recess of an adjacent jig segment or spacer. In one arrangement opposing jig segments and/or spacers lock together with a combination of rotational movement as well as sliding movement.