A machining device, in particular a grinding device, for the machining of slots in a component, in particular radially lying slots in a stationary blade carrier, with a base carrier, a clamping device, which is attached to the base carrier pivotably about a pivot axis and is designed to fix the base carrier on the component to be machined, a guiding rail, which is guided on the base carrier displaceably in a straight line in a guiding plane lying perpendicularly in relation to the pivot axis, and a tool holder head, which is held on the guiding rail pivotably about a rotation axis parallel to the pivot axis and carries fastening means for the attachment of a machining tool is provided.

A SiC wafer is processed by a laser beam having a wavelength that transmits SiC to form a peeling plane in a region of the wafer which corresponds to a device area of a first surface of the wafer. A plurality of devices demarcated by a plurality of intersecting projected dicing lines in the device area are formed on the first surface. An annular groove is formed on a second surface of the wafer which is opposite the first surface, in a boundary region of the wafer between the device area and an outer peripheral excessive area surrounding the device area. A portion of the wafer which is positioned radially inwardly of the annular groove is peeled from the peeling plane, thereby thinning the device area and forming an annular stiffener area on a region of the second surface which corresponds to the outer peripheral excessive area.

A method for cutting a blade root retention slot in a turbine engine disk element includes forming a precursor slot in the element. The precursor slot has first and second sidewalls and a base. A rotating bit is passed through the precursor slot to machine the base. The bit rotates about an axis off-normal to a direction of passing. A cutting performance of the rotating bit is modeled reflecting a chip trapping intensity parameter and a heat intensity parameter. At least one parameter of the bit and its passing is selected so as to avoid tool loading where removed chips/swarf stick onto the bit.

A method for cutting a blade root retention slot in a turbine engine disk element includes forming a precursor slot in the element. The precursor slot has first and second sidewalls and a base. A rotating bit is passed through the precursor slot to machine the base. The bit rotates about an axis off-normal to a direction of passing. A cutting performance of the rotating bit is modeled reflecting a chip trapping intensity parameter and a heat intensity parameter. At least one parameter of the bit and its passing is selected so as to avoid tool loading where removed chips/swarf stick onto the bit.

A method of machining, with a formed tool, a first rotor and a second rotor with mutually complementary meshing threads involves rotating a first workpiece about a longitudinal axis of the workpiece. The tool makes one or more passes along the longitudinal axis of the workpiece as the workpiece rotates so as to remove material, thereby forming the flanks of each helix of the first rotor's thread. The value of at least one of the parameters that collectively define the relative position and relative movement of the workpiece and formed tool is varied during each pass so as to vary the lead of the thread. The above steps are repeated for a second workpiece, thereby forming the second rotor. Adjustments are made to at least one of said parameters during one or more of the passes in order to maintain mutually complementary shapes of the threads of the rotors.

A puncture needle includes a needle tube 1 provided with a spiral groove 3 and wall surfaces 3a and 3b of the spiral groove 3 serve as a surface for reflecting ultrasonic waves. The spiral groove is formed on the peripheral surface of the needle tube such that a grinding stone 2 is brought into contact with the peripheral surface of the needle tube while the needle tube 1 is being moved in its axial direction and rotated. The wall surfaces of the spiral groove formed on the needle tube serve as a reflection surface to change the orientation of the reflection surface in the axial direction of the needle tube according to change in position of the spiral. Therefore, even if a direction in which an ultrasonic wave is applied to the puncture needle is fixed, any portion of the reflection surface changing in orientation can become a surface for reflecting well ultrasonic waves, so that good ultrasonic waves can be obtained. The slant angles of the reflection surfaces in the axial direction of the needle tube can be changed by adjusting the moving speed in the axial direction of the needle tube or the rotation speed.

A puncture needle includes a needle tube 1 provided with a spiral groove 3 and wall surfaces 3a and 3b of the spiral groove 3 serve as a surface for reflecting ultrasonic waves. The spiral groove is formed on the peripheral surface of the needle tube such that a grinding stone 2 is brought into contact with the peripheral surface of the needle tube while the needle tube 1 is being moved in its axial direction and rotated. The wall surfaces of the spiral groove formed on the needle tube serve as a reflection surface to change the orientation of the reflection surface in the axial direction of the needle tube according to change in position of the spiral. Therefore, even if a direction in which an ultrasonic wave is applied to the puncture needle is fixed, any portion of the reflection surface changing in orientation can become a surface for reflecting well ultrasonic waves, so that good ultrasonic waves can be obtained. The slant angles of the reflection surfaces in the axial direction of the needle tube can be changed by adjusting the moving speed in the axial direction of the needle tube or the rotation speed.

A manufacturing method of a casing including the following steps is provided. A magnesium alloy substrate is provided first. Next, a protective film is formed on the magnesium alloy substrate. A grinding treatment, a cutting treatment, or an engraving treatment is then performed to remove portions of the protective film and portions of the magnesium alloy substrate. An electrophoretic coating treatment is performed afterwards to form a light-transmissive coating layer covering the protective film and the magnesium alloy substrate. A casing is also provided.

A manufacturing method of a casing including the following steps is provided. A magnesium alloy substrate is provided first. Next, a protective film is formed on the magnesium alloy substrate. A grinding treatment, a cutting treatment, or an engraving treatment is then performed to remove portions of the protective film and portions of the magnesium alloy substrate. An electrophoretic coating treatment is performed afterwards to form a light-transmissive coating layer covering the protective film and the magnesium alloy substrate. A casing is also provided.

The invention describes an additional manufacturing method to improve the metallurgical properties of an endodontic file, which method customizes torsional and cyclic fatigue resistance behavior performance for separate files sizes. A heat-treatment file size tailored method accomplished after grinding the blank is disclosed aiming to improve the elasticity behavior of the specific file size based on its application during instrumentation protocol, also generating a colored oxidation layer on the working part surface of the file. The colored coded customized heat-treatment process will help the operator to identify the improved metallurgical properties behavior of each file, and decide the best use of such files.