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我厂在试制SP-I型软岩支护机械手过程中,遇到了45°螺旋内齿轮的加工难题。由于该零件是单件生产,根据本厂现有设备及设备的技术特性,我们制订了一种经济合理的在CA6140车床上车削大螺旋角内齿轮的工艺方案,基本解决了这一难题。 1.加工原理螺旋内齿轮螺旋线的形成原理实质上与多头内螺纹的形成原理相同。所以,加工时工件与刀具的传动关系只要保证工件转一周,成形刀具在分度圆柱轴线方向移动一个导程即可,齿形精度由成形刀具保证。 2.加工过程筒体式夹具(图1所示)安装在CA6140车床主轴三爪卡盘上,并校正内孔φ112.07与车床主轴的同轴度,工件(图2)由φ112.07外圆及端面在夹具内定位,并由夹具圆周径向布置的三个螺钉夹紧,工件径向定位由夹具端面布置的φ5定位柱定位;刀杆安装在
I plant trial SP-I-type soft rock support robot in the process, encountered 45 ° spiral gear processing problems. Since the part is produced in one piece, we have developed a cost-effective process for turning a large helix angle CA6140 lathe into a single piece, based on the technical characteristics of our existing equipment and equipment, and basically solved this problem. 1. Machining principle Spiral helical gear forming principle is essentially the same principle with the formation of long internal thread. Therefore, the processing of the workpiece and the relationship between the transmission of the workpiece as long as the workpiece to ensure a week, the forming tool in the axial direction of the indexing cylinder to move a lead, the accuracy of the profile by forming tools to ensure. 2. Machining process The fixture (shown in Figure 1) is installed on the CA6140 lathe spindle three-jaw chuck and calibrates the coaxiality of bore φ112.07 with the lathe spindle. The workpiece (Figure 2) consists of φ112.07 outer circle And the end face is positioned in the fixture and is clamped by three screws radially arranged on the circumference of the fixture. The radial positioning of the workpiece is positioned by the φ5 positioning column arranged on the end face of the fixture;