Recently, many netizens left a message saying, "what are the operation skills of machining?" After seeing the problems, Ruijin factory and precision production department communicate and sort out the following points for your reference and study:
1、 Programming skills
Dongguan Ruijin Precision Hardware Co., Ltd. has its own set of processing mode in the use of programming skills, which greatly reduces processing time and increases efficiency. CNC is committed to the production of high-precision machining center, which is also convenient to meet the high-precision requirements of processed products in the future. Therefore, the items to be considered in programming include:
1. Processing sequence of parts:
Drilling first and then flat end (this is to prevent shrinkage during drilling);
First rough turning, then fine turning (this is to ensure the accuracy of parts);
First, the machining tolerance is large, and last, the machining tolerance is small (this is to ensure that the surface of small tolerance dimension is not scratched and prevent the deformation of parts).
2. Select reasonable rotation speed, feed rate and cutting depth according to material hardness:
Choose low speed, low feed rate and small cutting depth for cemented carbide. For example: GH4033, select S800, f0.08, cutting depth 0.5mm;
Carbon steel material selection high speed, high feed rate, large cutting depth. For example: 1gr11, s1600, f0.2 and 2mm cutting depth are selected;
Titanium alloy selection of low speed, high feed, small cutting depth. For example: ti6, S400, f0.2 and 0.3mm cutting depth are selected. Take processing a part as an example: the material is k414, which is a special hard material. After many tests, S360, F0.1 and 0.2 cutting depth are finally selected to process qualified parts.
2、 Skill of knife setting
The tool setting is divided into tool setting instrument and direct tool setting. Most of our lathes do not have a tool setting instrument, which is a direct tool setting. The tool setting skills mentioned below are a direct tool setting.
First, select the center of the right end face of the part as the tool setting point, and set it as the zero point. After the machine returns to the zero point, each tool that needs to be used will use the center of the right end face of the part as the zero point for tool setting. When the tool contacts the right end face, input Z0 and click to measure, and then the tool compensation value of the tool will automatically record the measured value, which means that the tool setting of axis Z is right. The tool setting of axis X is the tool setting for trial cutting, and use the tool to turn the outer circle of the part Less, measure the value of the outer circle of the car (for example, X is 20 mm), input X20, click to measure, the tool compensation value will automatically record the measured value, and then the X axis is also right; this tool setting method, even if the machine tool is powered off, does not change the tool setting value after power on and restart, can be applied to mass production of the same part for a long time, during which the lathe does not need to be turned off again.