我厂在制造连杆时,其中有120毫米的大圆弧需要铣出。材料为中炭钢A5,毛坯为自由锻造,一般的加工余量为30～50毫米。铣床组的老师傅共同研究出一种高效率的简易铣刀,经使用证明效果良好。由于刀具形状像一把勺子,所以叫勺铣刀。刀具的特点(见附图): 1.刀具的材料为W18Cr4V高速钢;淬火硬度为HRC 62～65。2.有较大的负前角,增强了刀具的强度。3.刀具前面成勺形,切屑 I plant in the manufacture of connecting rod, which has 120 mm large arc milling needs. Materials for the carbon steel A5, rough for free forging, the general processing allowance of 30 to 50 mm. Master milling machine group to work together to develop a simple and efficient milling cutter, the use of proven good results. Because the shape of the tool like a spoon, so called spoon cutter. The characteristics of the tool (see attached drawings): 1. The tool material is W18Cr4V high-speed steel; quenching hardness HRC 62 ~ 65.2. Larger negative rake angle, enhance the strength of the tool. 3 knife in front of a spoon-shaped, chip