A workpiece holding assembly (20) comprises a magnetic chuck (22), and first and second separate sets of workrests for engaging with the outer circumferential surface of an annular workpiece (40, 60). The workrests are configurable such that when the outer circumferential surface of the workpiece (40, 60) is ground with the chuck Urotating in one direction, the outer circumferential surface is only urged in contact with the first set (26, 28) of workrests, and when an inner circumferential surface of said workpiece is ground with the direction of rotation of the chuck reversed, the outer circumferential surface is only urged in contact with the second set (30, 32) of workrests. Grinding methods using such a workpiece holding assembly are also described.

The present invention relates to a measuring steady rest which has a device for supporting central workpiece regions, in particular, bearing points on shaft parts, in particular crankshafts, and a measurement device integrated therein for directly adjusting the measurement of the workpiece regions before and/or during machining of the shaft parts. The measuring steady rest is preferably designed in the form of a prism, the measurement device being arranged on the bottom of the prism between the lateral flanks of the prism. The present invention further relates to a grinding machine comprising such a measuring steady rest, and to a method for supporting and measuring central workpiece regions on such a grinding machine comprising such a measuring steady rest.

Systems and methods of providing run-time quality control and monitoring of a single or multiple sequencing runs are provided herein. In some embodiments, the run-time system includes or is in communication with a processor capable of determining various types of run-time information relating to the quality, progress, etc. of various sequencing runs. In some embodiments, the system can also be in communication with a user interface, for example, a GUI, capable of representing and communicating various types of information to a user regarding the quality of the individual or multiple runs, the functioning of the instrument, an error event, etc. Additionally, the system can capable of receiving actionable information from a user via the GUI thereby allowing the user to terminate or repeat various sequencing steps in a particular run, terminate a entire run, terminate all runs, allow a run to proceed, etc.

A knife sharpener may include a suction cup, a main base, a sharpening set, a first cover, a control handle, and an upper cover. The suction cup is adapted to create vacuum so as to enable the knife sharpener to be attached on a working surface, and a lever extends from a top surface of the suction cup. The main base has different heights of a first portion and a second portion thereon to form a stepped shape. The sharpening set comprises two pieces of sharpening stones which are coupled together to form a sharpening space therebetween. The first cover having appropriate transparency is a board body. The control handle has a second through hole axially penetrating through a central portion thereof, and an abutting block is horizontally extended from the connecting portion to protrude from a rear end of the control handle.

A steady rest has working and right-hand cover plates and a central plate sandwiched therebetween. The working cover plate has upper and lower guide tracks that are received within cavities. The central plate is movably disposed between the working and right-hand cover plates. The central plate slidably engages upper and lower gripping arms that are movable relative to the working cover plate between a clamped position and a retracted position. Tapered rails are disposed in a rail recess of the working cover plate. The rails are movable relative to each other to finely and precisely adjust a position at which the workpiece is clamped and moved horizontally or vertically when the gripping arms are in the clamped position.

In an apparatus for multiple-bearing grinding of workpieces, such as crankshafts, wherein a support element seat occurs at a bearing point at the same time as the grinding of the main bearing, a grinding-supporting unit is used that contains a grinding spindle head having at least one grinding disk and support elements in the form of support jaws or support bodies that can be swiveled in. After the support point seat is ground, the support elements are brought into contact there-with and support the workpiece during the further machining. The simultaneous grinding of the support point seat and several bearing points results in a reduction in the machining time in the grinding of the workpiece compared to the prior art.

Computer-implemented method of operating an ice skate blade grinding apparatus, which comprises determining a number of contiguous ice skate blades inserted into the apparatus; and setting an operating parameter of the apparatus based at least in part on the determined number of contiguous ice skate blades. This allows optimized sharpening and profiling of multiple blades at a time.

A wheel fixture is disclosed. A main shaft drives a first positioning pull rod on a chuck body to extend and contract in the radial direction via a tightening screw, a clamping jaw is at a position within the travel range of extension and contraction, a wheel is positioned and clamped by the fixture, airtight support blocks are pressed down by the wheel and flush with the support plane of the clamping jaw, at this time, airtight ejector rods press second O rings to prevent air from flowing out of the airtight detection position, a detection system of a machine tool detects a preset air pressure value which indicate that the wheel has been placed correctly, and if the wheel is not placed correctly on the fixture, the machine tool will alarm through the detected pressure feedback.

Systems and methods of providing run-time quality control and monitoring of a single or multiple sequencing runs are provided herein. In some embodiments, the run-time system includes or is in communication with a processor capable of determining various types of run-time information relating to the quality, progress, etc. of various sequencing runs. In some embodiments, the system can also be in communication with a user interface, for example, a GUI, capable of representing and communicating various types of information to a user regarding the quality of the individual or multiple runs, the functioning of the instrument, an error event, etc. Additionally, the system can capable of receiving actionable information from a user via the GUI thereby allowing the user to terminate or repeat various sequencing steps in a particular run, terminate a entire run, terminate all runs, allow a run to proceed, etc.

A system includes an abrasion assembly containing one or more abrasion pads configured to clean a faying surface of multiple nutplates, and a shaft attached to at least one of the abrasion pads and configured to rotate some or all of the abrasion pads during cleaning, wherein cleaning includes abrading the faying surfaces with the abrasion pads. The system also includes a base configured to attach to a pressure applicator, and a pressure applicator configured to attach to the base, hold the nutplates such that the faying surface of each nutplate is capable of contacting one of the abrasion pads, and apply pressure to the nutplates such that each of the nutplates contact one of the abrasion pads during the cleaning. Furthermore, the abrasion assembly is configured to rotate the abrasion pads within at least one of the base and the pressure applicator during cleaning.