First, programming skills
Because I plant for processing the product accuracy is higher, so when programming considerations are as follows: 1. Parts of the processing sequence: bored after the first flat side ( This is to prevent the borehole shrinkage material) ; Coarse car first, then finish turning ( This is to ensure accuracy of parts) ; Machining tolerance first big final machining tolerance little ( This is to ensure that small tolerance size surface scratches and prevent deformation of parts) 。 2. According to the material hardness, choose reasonable speed, feed and cutting depth: 1) Carbon steel material selection of high speed, high feed and cutting depth. Such as: 1 gr11, choose S1600, F0. 2, cutting depth 2 mm; 2) Carbide choice low speed, low feed and small cutting depth. Such as: GH4033, choose S800, F0. 08, cutting depth 0. 5mm 3) Titanium alloy choice low speed, high feed, small cutting depth. Such as: Ti6, select the S400, F0. 2, cutting depth 0. 3mm。 In machining a part, for example: materials for K414, this material is very hard, after many test, final choice for the recent, F0. 1, the cutting depth 0. 2, to work out qualified parts. Second, the knife into the knife knife skills into the instrument on the knife and directly on the knife. Most of our factory lathe instrument shall be the knife, to directly on the knife, the following said the knife skills for directly on the knife. To choose the right end face of parts center point of the knife, and is set to zero, after the machine back to the origin, every right end face of all the tools needed to parts center as the zero point of the knife; Input Z0 click measuring tool in contact with the right end, cutter knife repairing values inside will automatically record the measured values, which means that the Z axis to the knife to the good, X knife to try to cutting knife, measured with cylindrical less tool car parts, cylindrical numerical (by a car If x is 20 mm) Input x20, click on the measurement, knife repairing value will automatically record the measured values, then the x axis for good; This knife method, even if the machine electricity, phone call after the restart still does not change the value of the knife, can be applied to mass produce the same parts for a long time, during which also do not need to shut down lathe knife. Three, the debugging technique parts at the program, to try to cut the debugging after the good dao, in order to prevent errors and mistakes of knife to appear on the program, cause the crash, we should travel simulation processing, advanced and unconstrained style in the machine tool coordinate in the face of cutting tool to the right department integral translation parts total length of 2 - — 3 times; Then start simulation processing, processing after complete the confirmation process and the knife is correct, then to start to machining of parts, after the completion of the first article parts processing, first self-check, confirm qualified, then find full-time inspection check, qualified full-time inspection confirmed that the said end of commissioning. Four, the finished parts machining parts after completion of the first trial cut, be a batch production, but the first thing that is not equal to the whole batch of qualified parts will be qualified, because in the process of machining, due to the difference of processing material can make the cutting tool wear, processing of soft material, tool wear is small, hard processing material, tool wear is fast, so in the process of machining, to regular amount of regular inspection, timely repair value increase and decrease the knife, ensure that qualified parts. In some parts, for example, processing materials for K414, processing length is 180 mm, because of hard materials, processing of tool wear very quickly, from start to finish, because the tool wear produces 10 - A degree of 20 mm, so we must in application for adding 10 - — 20 mm slightly degrees, so that to guarantee the qualified parts. All in all, the basic principles of processing: first rough machining, the extra material artifacts are removed, and then finish machining; The occurrence of processing should be avoided in vibration; Avoid artifacts when processing the thermal denaturation, caused by the vibration occurs for many reasons, may be too much load; May be the machine tool and workpiece resonance, or may be insufficient rigidity of machine and also could be the result of a cutting tool after passivation, we can use the following method to reduce vibration; Reduce transverse feeding and processing depth, check whether the workpiece clamping, improve the speed of the tool which reduce speed can reduce resonance, in addition, check whether there is a need to change the new tool. Five lessons on collision, to prevent the machine tool machine tool collision is a lot of damage to the precision of the machine tool, for different types of machine tools influence is different also, in general, for greater effects on the machine tool of rigid is not strong. So for high precision numerical control lathe, the collision is absolutely to put an end to, as long as the operator carefully and master a certain method of collision, the collision is completely can be prevented and avoided. Collision of the main reasons: one is the cutter diameter and length of input error; The second is about the size of the workpiece and other related geometry size input error and the initial position of the workpiece positioning error; Three is the workpiece coordinate system of machine tool setting error, or machine zero point in the process of machining is reset, and produce change, machine tool collision occurs mostly in the process of fast moving machine tool, then the collision is also the biggest hazard, should absolutely avoid. So the operator should pay special attention to machine tools in the initial stages of execution and the replacement of cutting tools, once the program editing mistake at this time, the diameter of the cutting tool and the length of the input errors, it is easy to collide. Phase at the end of the program, the numerical control shaft of the blade action sequence errors, so may collide. In order to avoid the collision, the operator in the operation of the machine tool, to give full play to the function of the facial features, observe the machine with and without abnormal movements, with or without spark, have no noise and abnormal noise, have without vibration, presence of caramel flavour. Found abnormal situation should immediately stop the program, after being machine problem solving, machine can continue to work. All in all, to master the operation of the CNC machine technique is a gradual process, not overnight. It is based on the mastery of the basic operation, basic knowledge of mechanical processing machine tool and basic programming knowledge. CNC machine operating skills also is not the same, it is need to the operator the ability to give full play to the imagination and organic combination, is innovative labor.