A fastening system including a frame, a movement control assembly, a fastener drive assembly and a collar presenting assembly. The frame can be coupled to an outside structure, for example, with a part that is to be coupled with a fastener attached to the frame. The movement control assembly is configured to controllably move the fastener drive assembly relative to the frame and the part so as to grasp the collar of the fastener, engage the threaded pin of the fastener and to threadedly engage the two structures together. The collar presenting assembly presents a collar of a fastener to the fastener drive assembly.

A hydraulic tensioning and release tool for an expansion fastener of a type having an elongate member with a tapered portion for fastening a workpiece. The tool includes a sleeve for placement about the tapered portion; a cylinder(s) including a cylinder for generating compressive force against the workpiece; a release piston for displacing the sleeve and a tension piston for coupling to elongate member. The tension piston and the cylinder(s) defining a tension chamber and the release piston. One of cylinder(s) defines at least one release chamber. Hydraulic ports are in fluid communication with the tension chamber and the release chamber for application of hydraulic pressure to displace the tension piston and the release piston for respectively tensioning the elongate member and for releasing the sleeve from the tapered portion. A tension retaining arrangement retains the elongate member in tension subsequent to removal of hydraulic pressure from the tensioning chamber.

A processing machine for track processing includes a carrier which is connected to a chassis through a joint unit. A processing assembly and an energy supply unit are disposed at the carrier. The energy supply unit acts as a counterweight in a working state of the processing machine. The processing machine includes an adjustment mechanism for adjusting a distance between a center of gravity of the processing assembly and a center of gravity of the counterweight. A method for track processing is also provided. This enables simple, operator-friendly and flexible track processing.

A method for preloading a bearing includes releasably, threadably, and directly attaching an attaching member to a circumferential outside surface of an exposed end of a threaded shaft of an axle or spindle. A frame is axially separated from, and coupled to, the attaching member. A plurality of extensions extends from the frame axially past the attaching member toward the wheel hub assembly. An adjustment mechanism moves the frame and the plurality of extensions axially towards the wheel hub assembly to contact the wheel hub assembly and/or the bearing to apply a preload to the bearing within the wheel hub assembly.

A method for preloading a bearing includes releasably, threadably, and directly attaching an attaching member to a circumferential outside surface of an exposed end of a threaded shaft of an axle or spindle. A frame is axially separated from, and coupled to, the attaching member. A plurality of extensions extends from the frame axially past the attaching member toward the wheel hub assembly. An adjustment mechanism moves the frame and the plurality of extensions axially towards the wheel hub assembly to contact the wheel hub assembly and/or the bearing to apply a preload to the bearing within the wheel hub assembly.

Disclosed is a method for planning screw locking path using an ant colony algorithm, which includes: obtaining designated positions of screw holes to be locked; using a distance between the screw holes to be locked as pheromone; obtaining a set of initial paths for all lockings; determining whether a condition for ending an iteration is met, and the condition is whether all the locking paths have passed through all the designated positions; if the condition for ending the iteration is not met, obtaining a supplementary path for each locking path to form an entire path of each locking path until the condition for ending the iteration is met; taking a set of entire paths of all the locking paths as a set of final paths; obtaining a shortest path from the set of final paths.

Disclosed is a method for planning screw locking path using an ant colony algorithm, which includes: obtaining designated positions of screw holes to be locked; using a distance between the screw holes to be locked as pheromone; obtaining a set of initial paths for all lockings; determining whether a condition for ending an iteration is met, and the condition is whether all the locking paths have passed through all the designated positions; if the condition for ending the iteration is not met, obtaining a supplementary path for each locking path to form an entire path of each locking path until the condition for ending the iteration is met; taking a set of entire paths of all the locking paths as a set of final paths; obtaining a shortest path from the set of final paths.

An impact wrench for tightening and loosening nuts and screws on a track has a vibration decoupling device which serves for vibration decoupling of at least one handle from an electrically operated impact screwing mechanism.

There is provided a screw tightening apparatus that fastens, with a screw, two objects to be fastened including a first member provided with a first screw hole and a second member provided with a second screw hole for screwing, and the screw tightening apparatus includes: a distance measuring device that measures a relative position between the first member and the second member in a vertical direction perpendicular to the axial direction of the second screw hole; a screw tightening part that holds the screw inserted into the first screw hole and screws the screw into the second screw hole for screwing; a moving mechanism that moves the screw tightening part along the vertical direction; and a hardware processor that controls the screw tightening part and the moving mechanism according to a measured value of the distance measuring device.

There is provided a screw tightening apparatus that fastens, with a screw, two objects to be fastened including a first member provided with a first screw hole and a second member provided with a second screw hole for screwing, and the screw tightening apparatus includes: a distance measuring device that measures a relative position between the first member and the second member in a vertical direction perpendicular to the axial direction of the second screw hole; a screw tightening part that holds the screw inserted into the first screw hole and screws the screw into the second screw hole for screwing; a moving mechanism that moves the screw tightening part along the vertical direction; and a hardware processor that controls the screw tightening part and the moving mechanism according to a measured value of the distance measuring device.