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我厂生产16240ZB柴油机的配气机构中有不少凹凸球面体的零件,材料都为20Cr,球表面渗碳淬硬,球面半径的误差为0.01～0.02mm,光洁度为▽7.过去我们均在C620车床上采用成形刀具加工,但生产效率低,成形刀具的制造和刃磨都很困难。针对我厂生产的这一关键,我们改装了C616车床,运用旋风铣削凸凹球面的原理加工各种凹凸球面零件。经过多年的实践应用,生产效率提高了两倍。现将其具体情况介绍如下: 一、铣削凹凸球面 1.铣削凹面球体(如产品中的顶杆座等) 凹球面的铣削加工方法如图1所示。圆柱体刀杆的轴线y-y与内球座轴线x-x的交角为α。内球座体(即工件)装夹在机床主轴的三爪卡盘上,在铣刀旋转的同时,工件也旋转,铣刀自切入工件的E平面开始,沿y-y轴线移至P点,进行铣削,即可加工成内球面
I plant production 16240ZB diesel engine with many concave spherical body parts, materials are 20Cr, the ball surface carburizing hardened spherical radius of the error of 0.01 ~ 0.02mm, the finish is ▽ 7. In the past we are at C620 lathe forming tool processing, but the production efficiency is low, the forming tool sharpening and grinding are very difficult. For this key production of our plant, we modified the C616 lathe, the use of cyclone milling convex and concave spherical principle of processing a variety of concave and convex spherical parts. After years of practical application, production efficiency has tripled. The specific situation is as follows: First, the milling concave and convex spherical 1. Milling concave sphere (such as the product of the rod seat, etc.) concave spherical milling method shown in Figure 1. The angle of the y-y axis of the cylinder arbor and the axis x-x of the inner ball seat is α. The ball seat body (ie, workpiece) is clamped on the three-jaw chuck of the spindle of the machine tool. When the milling cutter rotates, the workpiece also rotates. The milling cutter starts from the E plane of the workpiece and moves to the P point along the yy axis Milling, can be processed into the sphere