实验二 车削加工切削力测量实验报告书附指导书

1、车削加工切削力测量实验报告书学 号 13120110 姓 名 傅亥杰 小 组 11 时 间 2015年12月17日成 绩 上海大学 生产工程实验中心2015-11一实验概述 切削过程中，会产生一系列物理现象，如切削变形、切削力、切削热与切削温度、刀具磨损等。对切削加工过程中的切削力、切削温度进行实时测量，是研究切削机理的基本实验手段和主要研究方法。通过对实测的切削力、进行分析处理，可以推断切削过程中的切削变形、刀具磨损、工件表面质量的变化机理。在此基础上，可进一步为切削用量优化，提高零件加工精度等提供实验数据支持。 通过本实验可使同学熟悉制造技术工程中的基础实验技术和方法，理解设计手册中的设计

2、参数的来由，在处理实际工程问题中能合理应用经验数据。 二实验目的与要求 1. 掌握车削用量c、f、ap，对切削力及变形的影响。2. 了解刀具角度对切削力及变形的影响。3. 理解切削力测量方法的基本原理、了解所使用的设备和仪器。 4. 理解切削力经验公式推导的基本方法，掌握实验数据处理方法。 三实验系统组成 实验系统由下列设备仪器组成 1、微型数控车床KC0628S2、车床测力刀架系统（图1），包括（1）车削测力刀架（2）动态应变仪（3）USB数据采集卡（4）台式计算机USB数采器虚拟仪器台式计算机 USB线放大器微型车床测力刀架图1四、实验数据记录与数据处理1. 切削力测量记录表1实验条件工件

3、材料铝工件直径30刀具结构材料规格前角后角副后角主偏角副偏角刃倾角外圆车刀硬质合金序号转速(rpm)切削速度(m/min)切削深度(mm)进给量(mm/r)主切削力Fz(N)背向力Fx(N)110000.20.017.634.82210000.20.0158.615.23310000.20.029.445.67410000.20.0259.615.76510000.40.0110.555.85610000.40.01511.065.98710000.40.0212.366.44810000.40.02513.126.72910111213141516主切削力 背向力 切削深度0.45.1042

4、449.4623695.2942959.6619525.3756889.8299205.4090049.9693905.44348110.0590465.54598510.0682385.61321710.2638005.62196610.1759075.63170710.3132855.63629710.3277705.73324610.3846005.71710310.4899725.68683810.4577825.65984610.3839645.73113310.4596695.77931410.4330185.77820610.5091145.81727210.5661295.89

5、562710.5713405.91942410.5957135.90332010.6754405.87125610.6176255.84343010.5480955.87940610.4652505.78367010.3329815.82956910.3237895.81180910.2711855.85875110.5333645.96356310.4872436.02993410.5545576.08708710.6258116.10315210.7016606.17325210.7527666.27047510.7933886.26610710.8916006.13400310.6944

6、386.17363010.8657906.18256210.7184836.09775310.6779226.07901510.7897576.07947210.8252506.00060910.7557416.01817310.6419376.03294710.8072785.94636410.6734296.04215310.7957896.08077610.8549376.01879910.6679106.06778810.8599846.10915010.7541616.09441510.7942506.01458710.9360805.95246711.1828095.9399621

7、1.2109175.87926211.0139395.45487710.6394955.10636910.0174605.12869310.0359045.32302110.3076645.75259610.8986996.03375511.1833026.03911411.1833026.06966611.1509276.07486911.1991816.05601411.2115325.96980911.0579265.99914811.1467215.91629511.1155985.96068111.0563055.92353211.0488785.98724311.0294915.9

8、9140311.2040855.97952411.0543775.96654911.0552186.02027211.1207276.08080211.1992226.03722411.1935806.08874311.3364776.08337111.3719296.11999911.2177906.08633111.2054396.09763611.3227516.07393011.2238836.06194711.1530616.06801011.3400676.05369311.244112主切削力 背向力 切削深度0.23.9761536.6095494.2102266.929296

9、4.4348587.2338624.5236977.3840834.6252237.5191014.6536497.5385504.6803807.5890624.7895477.6640284.8063817.6511444.7885697.6336854.8135017.6609104.8018307.7029074.7475607.6386914.8113497.7058614.9010617.7853214.8604827.6924024.8995887.8328984.9280407.8476094.9341437.9417794.9278197.8560004.9103727.87

10、56134.9818417.8524714.9609137.8734594.9249117.8233384.8381987.7904504.9261107.8621344.9721797.7974265.0217427.8660945.1034228.0521365.1292288.1144245.2407948.2263415.3801088.3148285.3993168.2736925.2718938.4117065.3534828.3875585.2902668.3306465.2664178.2863925.2037228.2038555.2076348.1320885.132487

11、8.1133365.1217958.0697805.1048048.0576555.1573548.1679725.1165538.1148555.0746578.0238855.0784128.0374675.0836678.0645905.1081038.0237835.0972158.1036535.0680208.1159225.1036838.0785005.1198138.0336515.1337268.4214105.1063698.4690295.1206478.4648024.8290318.0860294.3898467.4211764.2169947.1091024.25

12、76647.1409234.7493857.8625655.1138678.3635955.2789358.5347425.3204928.6156185.3692478.6096895.3409258.5879625.3387608.5552795.3611628.6326675.2931098.5305785.2399468.5309265.2306108.4905305.2318888.4796155.2062658.4429115.3162938.5559365.3032278.5239105.2849208.5191915.2807868.5387845.2535478.432325

13、5.2488658.4057975.3103088.5381075.2769408.4970135.2817128.4735225.2638748.5777865.2911408.5160325.3151988.5386005.3852208.6815995.3225138.5692305.3886758.6421055.3726768.6108585.3813608.6262665.3221488.594937force 25主切削力 背向力5.201919.6118725.180039.6303365.2185489.5733225.1295019.515835切削深度0.45.13788

14、69.5846065.1336879.514055.1424769.5420145.3234919.6498275.2450589.6398975.1937219.5484355.69578310.8695455.76098110.8246145.61313810.8064785.6842310.7544695.73762710.8962575.78091810.8465265.67704510.7973685.67652410.831615.71879810.8713095.70481910.8124276.14339211.815396.10480811.7815596.02143311.

15、6951646.01135311.6853166.03084711.6507466.02230611.7646536.01355711.7130346.00462511.6080116.11126211.7825436.12401511.6599386.27982412.4156176.19129912.3535346.26782812.4484436.25156812.3670756.23798112.3160516.32376812.4754426.28951312.302926.29947512.4057486.30834212.3184316.25965212.315312整理采集点并

16、运用MATLAB对数据处理如下：2. 请按指数规律拟合主切削力或背刀力和切削深度、进给量的关系，建立切削力的经验公式。答：对已有数据运用最小二乘法进行拟合，得出主（背）切削力关于进给量的双对数y=ax+b曲线及参数,其中1、2为主切削力，3、4为背向力：k1=0.4654 b1=3.4671 k2=0.2234 b2=2.5543 k3=0.4354 b3=3.6742 k4=0.2853 b4=3.6897 对已有数据运用最小二乘法进行拟合（由于只有两个数据，故直接取直线求解），得出主（背）切削力关于切削深度的双对数y=ax+b的参数，其中1、2为主切削力，3、4为背向力：k1=0.4467

17、 b1=0.9579 k2=0.3488 b2=0.9368 k3=0.5689 b3=1.3532 k4=0.5030 b4=1.3785 经上述数据可以计算得,其中1为主切削力，2为背向力：XFc1 =0.3443YFc1 =0.3865XFc2=0.3654YFc2 =0.5440Cap1=1.6002Cap2=1.0653Cf 1=2.5620Cf 2=3.5350Cfc1y= Cf1/ ap0 XFc1= 2.5620/0.20.3443=4.3210Cfz2y= Cap1/ f0 YFc1=1.6002/0.010.3865=8.7201Cfcy=（Cfc1y+ Cfc2y）/2=(4.3210+8.7201)/2=6.5012Fcy= Cfcy*ap XFc1*f YFc1=6.5012*ap0.3443*f 0.3865