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In CNC precision parts machining, there are 6 crafts that maintain strict requirements of the government. CNC machining machineries are quite fond of seeing such equipment: +/-0.005 “. Five thousandths of an inch is an exercise for any good mechanic – they might as well close their eyes and grind them. But those jobs are more demanding. Add another zero, and now you have: 0.0005 “. Holding five tenths of you is a totally different story. This is the difference between the thickness of human hair and white blood cells. When it comes to strict government service, here are some suggestions to maintain your spare parts specifications.
Running a Warm-up Program – Although this is a standard program for numerous CNC machines, there are some more troublesome things to study and run. A typical program will only preheat the spindle, which is critical for smoothing grease to prevent premature bearing wear. However, you also need to get the internal components to a stable working temperature to cope with thermal expansion. Now, if you only want to maintain strict government service on the Z axis, all of this is accurate, but if you combine the preheating of the spindle with the movement of the machine tool on the whole axis, it will help to go a step further. The machine is allowed to run for 10-20 minutes, and all parts are allowed to move to the desired temperature, which will help reduce the thermal expansion effect of milling time. In any case, at the end of the warm-up, ensure that all equipment is accurately measured and that strict military service is maintained.
Tool selection may be a factor in maintaining a strict bureaucracy. Rough processing equipment is used to carry out “rough processing” so as to reduce the wear of finishing tools and maintain accuracy.
Choose your equipment carefully – when you deal with these intolerant ministries, be sure to fit your equipment. You need to ensure that you have specific equipment for roughing and finishing so that the roughing cutter can accept wear and tear, while the finishing cutter only saves one process, thus ensuring the repeatable process of creating accurate parts.
Compensation for your equipment – equipment manufacturers are not happy, so they design equipment a little tolerant. They know that if you use their equipment to do something, you’ll be even happier if its reduced performance comes out of too big a size instead of too big a size. It’s like shaving: you might as well take a rest, but you can’t put it away. Knowing this, you need to make sure that the first thing you do when configuring an accurate job is to dial your essential device diameter. You may as well finish it in a variety of ways, but my preferred way is to milling a feature, and then use accurate equipment to verify the size. Easy – If you insert a 0.236-inch tool into a 0.250-inch hole, only a 0.248-inch measuring pin can be inserted, then your tool size will be reduced by 0.001 inches (because the size of each side can not be small, so use half value).
Thermal stability – This is one of the most important things on the list, because it can make a huge difference and you may not even notice it. Please pay attention to the location of your mechanical location. Is it near the window, if so, at some time of the day, where is the sunlight mapped on it? Does the air conditioning system start in the afternoon and cool in the cabin? Does your raw material remain in a stuffy warehouse and then enter a cold 68 degree environment? It looks innocent, but it will be yours. Great difficulties have arisen in the process. The thermal expansion or contraction of milling machines or cutting materials may vary greatly during your processing. Put all of this in lock-in – maintain your machinery and materials in a temperature-controlled climate, free from sunlight, and you will reap rewards – universality in your process.
Calibrate your equipment – when you’ve done all of the above, but all you need is * that * more rigorous, research on phone calls from manufacturers. When a machine is built, transportation falls off the truck, moves, stabilizes, and uses thousands of hours, things will be transferred and handled. This is unpredictable. Fortunately, there are several pieces of equipment, whether granite blocks or Renishaw Ballbar, that can help to loosen the mechanical reins to help maintain the corvee. We like to have a club test and adjust it as part of our annual care so that you can maintain a close relationship with mechanical accuracy. Otherwise, the implementation of these annual services can ensure that the bearing is tightened and smooth, the belt is properly tightened, and the drive motor runs well – these are important factors for accurate processing machinery.
If all fails, scales! – If you’re still doing all the work on this list and trying, it might be time to study using linear scales to get machinery. Your typical CNC machine tool will use the drive motor encoder as the key way to track its absolute position, but this may be due to the shortcomings of ball screw or temperature difference. Linear rulers change all of this – usually installed in the factory, they consist of two key parts – rulers and reading heads. In short – scales are like machines that can read with high accuracy.