An electric knife sharpener includes an accommodating unit including a base and an upper cover with a V-shaped opening slot, a driving unit fixed on the base and including a motor and an eccentric wheel, a linkage unit including a linkage mechanism and an upper fixing seat with two limiting rods thereof pivotally connected to an upper part of the upper fixing seat, and a grinding unit. The linkage unit has a guide groove located in a pivot end thereof and coupled to two guiding blocks in a through hole of the upper fixing seat. The grinding unit includes two sharpening components. One end of each sharpening component is pivotally connected in a groove of the linkage mechanism, so that the two sharpening components form a cross arrangement and opposite openings are formed between the two sharpening components to cross a sharpening accommodating space.

A manufacturing method for an optical connector includes inserting and fixing a multi-core fiber into a ferrule, wherein at least one of a plurality of cores of the multi-core fiber is a spiral core, inserting the ferrule into a housing and aligning the cores with the housing around a central axis of the multi-core fiber, obliquely polishing the ferrule while the housing rotates with respect to the central axis to have a rotational offset amount that compensates for positional misalignment of the cores expected due to the oblique polishing of the ferrule, and fixing the ferrule to the housing after the aligning of the cores.

A manufacturing apparatus for producing a curved contour on an end face of a roll includes a grinding device and a holding device, linearly movable relative to the grinding device. The grinding device is for grinding the curved contour on the end face. The holding device is for holding the roll between the holding device and the grinding device. A method for producing the curved contour on the end face using the manufacturing apparatus is also disclosed. The method includes driving the holding device to move in a linear fashion relative to the grinding device.

Disclosed herein are grinding machines for forming a trench. Embodiments relate to a grinding machine with a grind head and a vehicle mount. The grind head includes a housing body and a grinding drum. The vehicle mount is configured to attach the housing body to a vehicle. One embodiment of the disclosure relates to a trunnion attachment configured to attach the housing body to a vehicle such that the housing body is configured to roll about a roll axis oriented in a travel direction relative to the vehicle mount. The roll axis is proximate an initial contact point of the blade set. In another embodiment, a caster attachment is configured to attach the housing body to a vehicle such that the housing body is configured to yaw about a yaw axis oriented in an upward direction relative to the vehicle mount.

Disclosed herein are grinding machines for forming a trench. Embodiments relate to a grinding machine with a grind head and a vehicle mount. The grind head includes a housing body and a grinding drum. The vehicle mount is configured to attach the housing body to a vehicle. One embodiment of the disclosure relates to a trunnion attachment configured to attach the housing body to a vehicle such that the housing body is configured to roll about a roll axis oriented in a travel direction relative to the vehicle mount. The roll axis is proximate an initial contact point of the blade set. In another embodiment, a caster attachment is configured to attach the housing body to a vehicle such that the housing body is configured to yaw about a yaw axis oriented in an upward direction relative to the vehicle mount.

Rail grinders and related methods of rail grinding in which custom grinding patterns are continually updated based upon an operational status of the rail grinder. The rail grinder includes a plurality of individual grinding modules that are individually arranged to generate the custom grinding patterns for individual rail segments. The custom grinding patterns allow the rail grinder to grind a desired rail profile for each rail segment in a minimum number of grinder passes and at a maximum operating speed for the rail grinder. Utilizing a variety of inputs including current rail conditions, desired rail profile, rail segment type, available grinding modules and grinding module style, a processing system either on-board or remotely located from the rail grinder can iteratively develop a custom grinding pattern that is temporally unique to each rail segment.

A grinding device of a travel path, on which traveling wheels of a rail-type vehicle roll, includes a grinder which grinds a surface layer of a travel path, a frame on which the grinder is provided, and a device traveling wheel mounted on the frame. The device traveling wheel rolls along the travel path on the top surface of the standard rail extending in the extending direction of the travel path.

A grinding machine for finishing turned surfaces of a rotor disc for a gas turbine engine, including a retaining mechanism for retaining the rotor disc and rotatable about a rotational axis corresponding to a central axis of the rotor disc, a spindle engaged to a grinding wheel and rotatable about a rotational axis corresponding to a central axis of the grinding wheel, the grinding wheel having an outer super abrasive surface, a translating mechanism engaged to at least one of the retaining mechanism and the spindle and actuable to provide a relative translational motion between the retaining mechanism and the spindle along three perpendicular axes, and a pivoting mechanism engaged to one of the retaining mechanism and the spindle and actuable to provide a pivoting motion of the rotational axis of one of the retaining mechanism and the spindle around a pivot axis perpendicular thereto.

The present disclosure relates to a railroad track tool apparatus. The apparatus comprises a tool configured to perform an operation to the rail of the railroad track, a clamp assembly, and a coupling. The clamp assembly is moveable between a clamped position and an unclamped position to removably couple the tool with the rail. The clamp assembly is moveable along the rail. The coupling is configured to couple the tool to the clamp assembly. The coupling comprises a pivot, a linkage assembly comprising an arm coupled to the pivot, and a head coupled to the linkage assembly. The coupling is configured such that the tool is moveable between an inner side and an outer side of the rail, rotatable toward and away from the inner side or the outer side of the rail, and rotatable toward and away from an underside of the rail.

The present invention relates to a rust removing device for an elevator guide rail and aims at solving a problem of great time and labor taken and insufficient rust removal due to that rust of existing guide rail is removed manually. The rust removing device comprises: a support; a rust removal rack, mounted on the support and covering guide rail; and a rust removal material, arranged on a U-shaped inner wall of the rust removal rack and fitted with a surface of the guide rail. The rust removing device of the present invention has advantages that the rust of the guide rail is removed automatically instead of being removed manually, featured by a high rust removing speed, energy saving, simple maintenance, and less influence on users due to long-time service stop because of rust removal.