DRY HOBBING MACHINING DEVICE

• Main Authors: KARUBE SHU, KAWASHIMA MASUO, FUKUNAGA KEIGO, INOUE SHUNJI
• Format: Patent
• Language: English; Japanese
• Published: 07.04.2016
• Subjects: MACHINE TOOLS; MAKING GEARS OR TOOTHED RACKS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; TRANSPORTING

PROBLEM TO BE SOLVED: To provide a dry hobbing machining device capable of reducing jamming of chips onto a machining surface of gear wheel material, reducing cutting temperature, enhancing machining accuracy, realizing extension of a tool service life, and removing a cutter mark generated on a gear surface of a gear wheel.SOLUTION: Since dry hobbing machining is carried out on a peripheral part of gear wheel material while making a hob finely vibrate in axis direction, friction force generated between a blade surface of hob blades and chips is reduced. Thereby, jamming of chips onto a groove surface of the gear wheel material is reduced, cutting temperature is reduced, machining accuracy is enhanced, and extension of a tool service life is realized. Furthermore, by actuation of micro vibration means, the hob is finely vibrated in a direction orthogonal to a cutting direction of gear wheel material with hob blades, thus finishing effect in grinding is enhanced, the gear surface of the gear wheel is flattened and a cutter mark generated on the gear surface may be removed.SELECTED DRAWING: Figure 1 【課題】歯車材料の加工面への切粉の噛み込みを減少でき、かつ切削温度が低下し、加工精度が高まるとともに工具寿命の延長が図れ、歯車の歯面に発生するカッターマークを除去可能なドライホブ加工装置を提供する。【解決手段】ホブを軸線方向へ向かって微小振動させながら歯車材料の外周部にドライホブ加工するため、ホブ刃の刃面と切粉との間に生じる摩擦力が低減する。これにより、歯車材料の溝面への切粉の噛み込みが減少し、切削温度が低下して加工精度が高まり、工具寿命の延長が図れる。また、微小振動手段の作動により、ホブ刃による歯車材料の切削方向と直交方向にホブが微小振動するため、研削加工における仕上げ効果が高まり、歯車の歯面を平滑化してこの歯面に生じるカッターマークを除去できる。【選択図】図１