Various downhole tools, such as drilling motors, drilling tools, reamer tools, casing reamer shoes, and related methods of installation, assembly and use. Casing reamer shoes and drilling reamers or motors may have internal impellers, progressive cavity pumps, hollow rotors and other parts, universal joints, and other features. A progressive cavity section may have a rotor and a stator. Rotor contacting surfaces of the stator, and stator contacting surfaces of the rotor, may be rigid during use. The stator contacting surfaces and the rotor contacting surfaces may be made of metal. After the casing is run, the casing is cemented and the reamer shoe drilled out.

The present invention relates to an electrochemical machining method for manufacturing a cone. One or more conductive column and an electrode are driven to perform relative convolute motion. Then the conductive column is driven to perform electrochemical machining on the electrode for forming one or more hole in the electrode. Afterwards, the periphery of the hole in the electrode to perform electrochemical machining on the conductive column for forming a cone at one end of the conductive column.

A method of manufacturing a jointed device of a medical instrument includes providing a machining fixture on a wire electrical discharge machine having an electrical discharge wire. The fixture includes member holes each adapted to accommodate at least one workpiece, the workpiece being adapted to form a portion of the jointed device of the medical instrument. At least two workpieces each include a first workpiece and a second workpiece, accommodated within at least two member holes of the member holes. The fixture is associated with the wire electrical discharge machine so that the electrical discharge wire can cut at most one workpiece at a time. The machining fixture is rotated around a fixture rotation axis at a predetermined angle, which is chosen to provide that the electrical discharge wire can cut only one workpiece at a time. The workpieces are cut by the electrical discharge wire.

A method of manufacturing a jointed device of a medical instrument includes providing a machining fixture on a wire electrical discharge machine having an electrical discharge wire. The fixture includes member holes each adapted to accommodate at least one workpiece, the workpiece being adapted to form a portion of the jointed device of the medical instrument. At least two workpieces each include a first workpiece and a second workpiece, accommodated within at least two member holes of the member holes. The fixture is associated with the wire electrical discharge machine so that the electrical discharge wire can cut at most one workpiece at a time. The machining fixture is rotated around a fixture rotation axis at a predetermined angle, which is chosen to provide that the electrical discharge wire can cut only one workpiece at a time. The workpieces are cut by the electrical discharge wire.

Various downhole tools, such as drilling motors, drilling tools, reamer tools, casing reamer shoes, and related methods of installation, assembly and use. Casing reamer shoes and drilling reamers or motors may have internal impellers, progressive cavity pumps, hollow rotors and other parts, universal joints, and other features. A progressive cavity section may have a rotor and a stator. Rotor contacting surfaces of the stator, and stator contacting surfaces of the rotor, may be rigid during use. The stator contacting surfaces and the rotor contacting surfaces may be made of metal. After the casing is run, the casing is cemented and the reamer shoe drilled out.

A method of manufacturing a jointed device of a medical instrument includes providing a machining fixture on a wire electrical discharge machine having an electrical discharge wire. The fixture includes member holes each adapted to accommodate at least one workpiece, the workpiece being adapted to form a portion of the jointed device of the medical instrument. At least two workpieces each include a first workpiece and a second workpiece, accommodated within at least two member holes of the member holes. The fixture is associated with the wire electrical discharge machine so that the electrical discharge wire can cut at most one workpiece at a time. The machining fixture is rotated around a fixture rotation axis at a predetermined angle, which is chosen to provide that the electrical discharge wire can cut only one workpiece at a time. The workpieces are cut by the electrical discharge wire.

A method for manufacturing a customized orthodontic square wire is disclosed. The present invention comprises: a step of generating a setup model in which teeth of a patient are rearranged to a normal position; a step of determining the position of a bracket on the setup model; a step of generating a reference line connecting slots of the determined bracket; a step of generating data for a cutting and grinding operation having a rectangular cross section by using the generated reference line; and a step of manufacturing a square wire by cutting a material using the data for the cutting operation of the generated reference line.

Disclosed are a method for improving a surface quality of an alloy micro-area via a supersaturated film and use thereof. The method includes: adding nickel chloride to a sodium chloride-ethylene glycol electrolyte until the electrolyte is saturated, and conducting electrochemical machining.

A manufacturing method is provided during which a workpiece is electrical discharge machined using an electrode to form an aperture in the workpiece. A first voltage is measured indicative of a gap voltage between the electrode and the workpiece using a first measurement device to provide a first measurement signal indicative of the first voltage. Movement of the electrode is controlled using the first measurement signal. A second voltage is measured indicative of the gap voltage using a second measurement device to provide a second measurement signal indicative of the second voltage. A determination is made whether the electrode has broken through the workpiece using the second measurement signal.

The invention relates to a method machining a particularly planar component by means of electrochemical machining, wherein the component has internal stresses resulting particularly from preceding manufacturing steps. In a first step a) of the method, the component to be machined is provided. Subsequently, in step b), at least two tools are provided in the form of electrodes and, in step c), an electrolyte is provided between the component and the at least two electrodes. In step d), a positive voltage is applied to the component and a negative voltage is applied to the at least two electrodes. Thus, in step e), by moving the at least two electrodes along their respective movement paths with respect to the component, electrochemical machining can take place; in the process, the gap between each electrode and the component is flushed with the electrolyte at least intermittently.