An anodic oxidation-assisted grinding apparatus includes an electrolyte supply passage configured to pour an electrolyte at least between a cathode and a workpiece, a direct current power source configured to apply a direct current, via the electrolyte, to an anode, the cathode, and the workpiece to form an anodic oxidation film on a surface of the workpiece, and a grindstone configured to grind the anodic oxidation film formed on the surface of the workpiece.

The present application discloses a method for processing probe. Firstly, a clamping member of a rotation shaft is clamped with a workpiece, and then the workpiece is moved to a processed area by the rotation shaft. The workpiece is rotated by the rotation shaft, and an electrochemical process of the workpiece is performed under the rotation of the shaft and an electrolyte sprayed between the workpiece and the polished module. During the performing of the electrochemical process, it can be that the rotation shaft is moved a processing distance or the included angle of the polish module is changed, for a probe being accomplished from the workpiece. Thereby, the abrasion of the polish module is lower and the performance for processing the probe under the electrochemical process.

The present application discloses a method for processing probe. Firstly, a clamping member of a rotation shaft is clamped with a workpiece, and then the workpiece is moved to a processed area by the rotation shaft. The workpiece is rotated by the rotation shaft, and an electrochemical process of the workpiece is performed under the rotation of the shaft and an electrolyte sprayed between the workpiece and the polished module. During the performing of the electrochemical process, it can be that the rotation shaft is moved a processing distance or the included angle of the polish module is changed, for a probe being accomplished from the workpiece. Thereby, the abrasion of the polish module is lower and the performance for processing the probe under the electrochemical process.

The present invention relates to a downhole tool (23), for removing sections of metal tubing, comprising: at least one conductive element (1) being arranged to corrode a section of metal tubing using an electrolytic process, said conductive element (1) being a tube or a pipe which is made of electric conductive material, an apparatus (4) to establish a connection to the metal tubing (2), and a milling apparatus with cutting or abrasive elements (3) arranged to remove byproducts from the electrolytic process. The invention also relates to a modular downhole tool (45), comprising an elongated main shaft (8) with several modules for insertion in a wellbore.

The present invention relates to a downhole tool (23), for removing sections of metal tubing, comprising: at least one conductive element (1) being arranged to corrode a section of metal tubing using an electrolytic process, said conductive element (1) being a tube or a pipe which is made of electric conductive material, an apparatus (4) to establish a connection to the metal tubing (2), and a milling apparatus with cutting or abrasive elements (3) arranged to remove byproducts from the electrolytic process. The invention also relates to a modular downhole tool (45), comprising an elongated main shaft (8) with several modules for insertion in a wellbore.

The present invention is a probe forming device, the probe forming device comprises a spinning shaft, a first adjusting structure, a second adjusting structure, an electrolyte conveying member and a power supply. One of the holding member of the spinning shaft holds a workpiece, and a driving member drives the workpiece to move and abut the first adjusting structure and the second modulating structure. The electrolyte conveying member conveys an electrolyte to the workpiece, the first adjusting structure and the second adjusting structure, and is electrically connected. At least one positive end of the power supply is connected to the workpiece or the spinning shaft, and at least one negative end is connected to the first adjusting structure and the second modulating structure.

The present invention is a probe forming device, the probe forming device comprises a spinning shaft, a first adjusting structure, a second adjusting structure, an electrolyte conveying member and a power supply. One of the holding member of the spinning shaft holds a workpiece, and a driving member drives the workpiece to move and abut the first adjusting structure and the second modulating structure. The electrolyte conveying member conveys an electrolyte to the workpiece, the first adjusting structure and the second adjusting structure, and is electrically connected. At least one positive end of the power supply is connected to the workpiece or the spinning shaft, and at least one negative end is connected to the first adjusting structure and the second modulating structure.

The disclosure relates to the use of H.sub.2SO.sub.4 as an electrolyte in processes for polishing metals, specifically metal parts, for example in jewellery. According to some embodiments the polishing is carried out based on ion transport with electrically conductive free solids in a gaseous environment. According to some embodiments the solids comprise spherical particles with porosity and affinity for retaining the electrolyte so that they have appreciable electric conductivity.

A herringbone gear includes a cylindrical body having a circumferential face having a width. A first helical gear tooth on the circumferential face has a first configuration, a second helical gear tooth on the circumferential face has a second configuration, and a transition on the circumferential face extends between the first helical gear tooth and the second helical gear tooth. An involute form taken within a transverse plane of the circumferential face remains constant over the width.

A herringbone gear includes a cylindrical body having a circumferential face having a width. A first helical gear tooth on the circumferential face has a first configuration, a second helical gear tooth on the circumferential face has a second configuration, and a transition on the circumferential face extends between the first helical gear tooth and the second helical gear tooth. An involute form taken within a transverse plane of the circumferential face remains constant over the width.