A mid-frequency error-free machining method under a magneto-rheological polishing magic angle-step includes the following steps: measuring a magneto-rheological removal function, and determining a control accuracy of a machine tool; performing two-dimensional Fourier transform on the removal function, performing compensating filtering on a frequency spectrum based on the control accuracy of the machine tool, and analyzing a corresponding step at the lowest point of an amplitude of the two-dimensional frequency spectrum that undergoes filtering in a direction of a magic angle; planning a grid path under the given step on the basis of adjusting a direction of a machining path or a posture of a magneto-rheological polishing wheel to allow an included angle between the polishing wheel and the path kept to be at the magic angle; and finally, controlling the machining of the machine tool.

Magnetic apparatuses and systems for shaping parts are described. One or more magnets can be used to direct a magnetically responsive fluid having magnetically responsive particles around surfaces of a part. The magnetically responsive fluid can include abrasive particles that follow movement of the magnetically responsive fluid across surfaces of the part and remove material from the part until the part takes on a desired shape. The magnetic apparatuses can be configured to provide a rough cut, similar to machining process, and/or a fine cut, similar to polishing or buffing process, to the part.

An edge finishing apparatus includes a surface, a fluid delivery device configured to deliver at least one magnetorheological polishing fluid (MPF) ribbon to the at least one well, at least one magnet placed adjacent to the surface to selectively apply a magnetic field in a vicinity of the surface, and at least one holder placed in opposing relation to the surface, the at least one holder being configured to support at least one article such that an edge of the at least one article can be selectively immersed in the MPF ribbon delivered to the at least one well.

The invention relates to a blank for an endodontic instrument, obtainable by machining at least one rod by means of wire erosion, preferably selected from the group consisting of electrical discharge machining, wire electrical discharge machining, electrical discharge grinding and electro-chemical machining, wherein an erosion pattern is applied to the at least one rod, wherein the blank has a homogenous hardness.

Disclosed are various embodiments for a system and method of processing a surface using a mixture containing magnetic particles. A mixture is disposed on a workpiece and exposed to a dynamic magnetic field. In response to the dynamic magnetic field, the magnetic particles of the mixture may move along the workpiece. The movement of the magnetic particles creates a pattern of grooves on the surface of the workpiece.

A magnetic field manipulated localized polishing system includes a container holding a volume of a magnetic abrasive fluid. The magnetic abrasive fluid contains abrasive particles. A motor is positioned under the container. A magnet is coupled to the motor such that the motor induces rotation of the magnet. A workpiece is suspended in the container.

A multi-fields assisted abrasive scouring polishing method and device. The device includes an abrasive pool, a heating device, an ultrasonic device, a peristaltic pump and a clamping table. In use, first, magnetic poles are installed on a longitudinal rod of a workbench, and the internal channel of the workpiece is communicated with the pump inlet hose. Second, polishing slurry and abrasive particles are added into the abrasive pool, the heating end of the heating device and the vibrating end of the ultrasonic device are immersed into the polishing slurry, and the heating device and the ultrasonic device are started. Finally, a magnetic field device is energized and magnetized, and the peristaltic pump is started to polish the internal channel. The device solves the problems of poor surface quality and low polishing efficiency of a complex long and thin internal channel in a machine part containing an internal channel.

The present invention relates to a conformal flexible polishing method for a micro lens array mold, which realizes conformal flexible polishing. Solution 1: a magnet is installed below a workpiece so that the prepared magnetic slurry is fitted with the surface of the workpiece under the action of magnetic field force to produce a contact pressure; a magnetic polishing tool is installed above the workpiece, and the tool is magnetized; the polishing tool rotates, and the magnetic slurry on the tip end of the tool forms a spherical polishing head. Solution 2: a shear thickening slurry is used, a ball end tool is installed above the workpiece, and the shear thickening slurry is driven through the high-speed rotation of the ball end tool to rotate and produce a relative shear motion so as to carry out polishing under the action of the shear thickening effect.

An apparatus and a polishing system for rotational magnetorheological abrasive flow nano-finishing are described. The apparatus includes an upper cylinder with coupled upper piston and a lower cylinder with coupled lower piston. A first motor drives synchronized reciprocating motion of both pistons via respective slider crank mechanisms. A magnet fixture positioned between the cylinders includes permanent magnets arranged in a ring configuration with a central hole for workpiece placement. A second motor rotates the magnet fixture to manipulate magnetic field orientation. The cylinders, pistons and magnet fixture define a space for containing magnetorheological (MR) fluid including ferromagnetic particles, abrasive particles and carrier fluid. The configuration enables controlled fluid flow through the hole while maintaining direct workpiece contact, with ferromagnetic particles exhibiting both rotational and reciprocal movement patterns. This dual-motion finishing approach enables material removal through magnetic field-controlled abrasive action, achieving nano-scale surface quality on complex geometries.

A magnetic polishing slurry for polishing a workpiece includes magnetic particles coated with a modifying material, a liquid carrier, and abrasives. The modifying material has a hardness lower than that of the workpiece.