螺孔加工工艺规范

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1、螺孔加工工艺规范为了提高孔的加工质量，对孔加工进行规范如下：一、工艺要求1、钻床钻孔要求：使用钻杆找正，保证钻孔工作面与钻杆垂直；地坑底面、钻床工作台面、工作地面应采取一定措施，保证工件装夹后钻孔工作面与钻杆垂直，以免钻斜。钳工钻孔要求：钻孔前要用角尺靠正，保证钻孔工作面与钻头垂直。2、使用质量合格的钻头和丝锥；加工单元对钻头和丝锥的质量应进行有效监督并及时反馈。3、钳工严格按照钳工手册要求操作。操作要点如下：4、钻孔完成后必须清理毛刺，孔口必须倒角，孔内不得残留铁屑。二、钻孔标准。（1）应严格按照下表要求选

2、用钻头。圆柱管螺纹钻底孔用钻头直径尺寸表公称直径(英寸)每英寸牙数钻头直径(毫米)公称直径(英寸)每英寸牙数钻头直径(毫米)1/8288.811130.51/41911.711/81135.23/81915.211/41139.21/21418.913/81141.65/81420.811/21145.13/41424.313/411517/81428.121157圆锥管螺纹钻底孔用钻头直径尺寸表55°圆锥管螺纹60°圆锥管螺纹公称直径(英寸)每英寸牙数钻头直径(毫米)公称直径(英寸)每英寸牙数钻头直径(毫米

3、)1/8288.41/8278.61/41911.21/41811.13/81914.73/81814.51/21418.3½1417.93/41423.63/41423.211129.7111½29.211/41138.311/411½37.911/21144.11½11½43.921155.8211½56公制螺纹钻底孔用钻头直径尺寸表公称直径螺距t钻头直径dz公称直径螺距t钻头直径dzdd1粗0.250.7522粗2.519.5细0.20.8细21.5119.920.5212粗0.41.624粗321细0

4、.251.75细21.5121.922.5233粗0.52.527粗324细0.352.65细21.5124.925.5264粗0.73.330粗3.526.5细0.53.5细321.5126.927.928.5295粗0.84.233粗3.529.5细0.54.5细321.529.930.931.56粗1536粗432细0.755.2细321.532.933.934.58粗1.256.839粗435细10.7577.2细321.535.936.937.510粗1.58.542粗4.537.5细1.2510.

5、758.799.2细4321.537.838.939.940.512粗1.7510.245粗4.540.5细1.51.25110.510.711细4321.540.841.942.943.514粗21248粗543细1.51.25112.512.713细43243.844.945.91.546.516粗21452粗547细1.5114.515细4321.547.848.949.950.518粗2.515.5细21.5115.916.51720粗2.517.5细21.5117.918.519（2）普通粗牙螺纹小

6、径应符合以下要求：公称直径及螺距钻头直径螺纹小径公差（6H）上差下差M6*155.1534.917M7*166.1535.917M8*1.256.86.9126.647M9*1.257.87.9127.647M10*1.58.58.6768.376M11*1.59.59.6769.376M12*1.7510.210.44110.106M14*21212.2111.835M16*21414.2113.835M18*2.515.515.74415.249M20*2.517.517.74417.249M22*2.5

7、19.519.74419.249M24*32121.25220.752M27*32424.25223.752M30*3.526.526.77126.211M33*3.529.529.77129.211M36*43232.2731.67M39*43535.2734.67M42*4.537.537.77937.129M45*4.540.540.77940.129M48*54343.27942.587M52*54747.29746.587三、主要检验内容1、螺孔与端面的垂直度测量条件：螺纹全部旋入，露出部分长度不小

8、于螺纹直径的两倍；测量工具：角尺和塞尺精度要求：（1）端面为加工面：0.20（2）端面为非加工面：0.302、螺孔小径尺寸精度，符合公差要求。3、孔口倒角及铁屑毛刺清理。