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我厂加工B 2100柴油机缸体时,由于精度要求高,用一般的对刀方法很难保证精度要求(φ80+0.018 -0)。我厂老工人和技术人员共同研究设计了一种微调镗刀,解决了这一生产关键。一、原理及结构如图所示,微调丝杆8外径为10毫米,一端螺距t_1为1.25毫米,另一端的螺距t_2为1毫米,转动丝杆,借助丝杆两端的螺距之差推动镗刀向前。刻度盘转一周的调整量等于丝杆两端的螺距之差,调整量为0.25毫米。刻度的格数n=75,微调机构轴线与端面的夹角为41°25′,每转动一格镗刀径向推进微量值Δh:
When machining B 2100 diesel engine block in our factory, it is difficult to guarantee the accuracy requirement (φ80 + 0.018 -0) with the common method of tool setting due to the high precision requirement. I plant the old workers and technical staff to jointly study and design a fine boring tool to solve the key to this production. First, the principle and structure As shown, fine-tuning screw 8 diameter 10 mm, one end of the pitch t_1 1.25 mm, the other end of the pitch t_2 1 mm, turning screw, screw pitch difference between the two ends of the screw to promote the boring Knife forward. The adjustment of the dial for a week is equal to the difference of the pitch of the two ends of the screw rod, and the adjustment amount is 0.25 mm. The number of graduations n = 75, the angle between the axis of the fine adjustment mechanism and the end face is 41 ° 25 ’, and the radial value of the radial advance of each boring tool is Δh: