When forming a first preliminary flute on a PCD layer of a columnar body, electrical discharge machining is performed by setting the electrode orientation so that the first twist angle is α. Next, when forming a second preliminary flute on a substrate of the columnar body and a round bar, the grinding process is performed by setting the grinding orientation and direction for a diamond whetstone so that a second twist angle is larger than the first twist angle.

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.

In a wire electric discharge machine that machines a blade section of a cutting tool, in a state in which a rod-shaped reference jig is fixed to a rotary axis, a position on an outer circumferential surface of the reference jig is measured at each rotation position and stored. A rotational run-out error is calculated based on the stored rotational run-out position information, and a machining program is corrected to cancel the rotational run-out error.

In a wire electric discharge machine that machines a blade section of a cutting tool, in a state in which a rod-shaped reference jig is fixed to a rotary axis, a position on an outer circumferential surface of the reference jig is measured at each rotation position and stored. A rotational run-out error is calculated based on the stored rotational run-out position information, and a machining program is corrected to cancel the rotational run-out error.

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.

When forming a first preliminary flute on a PCD layer of a columnar body, electrical discharge machining is performed by setting the electrode orientation so that the first twist angle is α. Next, when forming a second preliminary flute on a substrate of the columnar body and a round bar, the grinding process is performed by setting the grinding orientation and direction for a diamond whetstone so that a second twist angle is larger than the first twist angle.

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.

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.