CNC engraving machine development in China from the last one or two years have achieved great development trend of related processing plants and the use of units of time with a keen eye staring at the factory, which is as a host of carving and milling machine factory didn't relax the real reason. Of course as the user to choose the right equipment, if improper selection, not only can not make money but make the machine work into the bitter situation. What kind of machine is a good tool?
We think this is a good definition of the machine tool can recover the investment in the short term, the machine is a good tool.
The design of NC machine tool life is generally 7 years, mainly CNC service life as the standard, and the proportion of such spending money will directly affect your business, so careful analysis of the function selection is a necessary condition for effective investment.
In foreign countries, engraving and milling machine (CNC engraving and milling machine), strictly speaking is a part of the carving milling, engraving machine is to buy or buy a CNC milling machining center is often the question to ask yourself. In addition, there is a prevailing high speed cutting machine (HSC MACHINE).
1, CNC milling and machining center for processing equipment to complete the large amount of milling work-piece
2, CNC engraving and milling machine for small milling, processing equipment or soft metal
3, High speed cutting machine for milling and finishing secondary amount, grinding amount after milling is reduced to the minimum processing equipment?
Analysis of structure of the equipment can help us make the right choice
The machine tool is divided into two parts, the moving parts and without moving parts: working table, cross slide, children for moving parts, bed, column and other non moving parts
Non moving part of steel requires very good mobile steel requirements are very good.
Advantages: capable of heavy cutting; disadvantages: as the mobile part of the same huge sacrifice machine flexibility, for a small part of the fast feed and incapable of action.
Non moving part of steel requirements to flexible steel moving parts as premise, as light as possible, while maintaining a certain steel.
Advantages: processing can be relatively small, high precision machining. For soft metal for high speed machining; disadvantages: as the steel of it is not possible for heavy cutting.
Non moving part of steel requires very good mobile steel requirements better, and as lightweight as possible.
Advantages: cutting can be in small quantities (generally Phi 10 flat bottomed cutter, for 45 steel (300) deep depth to 0.75 as well); disadvantages: proper use can play an efficient, low cost, so that the grinding quantity is few. Incorrect use, will make the scrap pile up like a mountain hand tool.
How do the above light, good rigidity and conflicting requirements from the machine, the key lies in the mechanical structure of the Kung fu.
1 - Bed body with low reinforcement with mesh architecture, some directly connected with the honeycomb inner six angle mesh structure The post and beam.
2 -- Wide, we know that the Long-men type structure due to its excellent steel symmetry and excellent high-speed cutting equipment manufacturers is preferred.
3, For the mobile part differ significantly with CNC milling is widened between many distance between rails, to overcome the bad moment problem.
4, From the material on the cast iron is the Meghan, join in pouring molten iron inoculated cast iron, certain proportion of silicon (Si) so as to change the internal structure of the iron making it more durable and have significantly improved rigidity.
5, The rigid machine mainly used to overcome the moving parts move at high speed on the moving part of the powerful impact, so the rail screw coarse, and strengthen the connection rigidity.
1, CNC milling machining center to speed CNC system, the spindle speed is about 0~8000RPM. The requirements of high speed CNC system.
2, CNC engraving and milling machine, spindle speed is about 3000~30000RPM
3, high speed cutting machine high speed CNC system and excellent servo motor characteristics, the spindle speed is about 1500~30000RPM
From a software perspective, CNC machining center, high speed cutting machine engraving and milling machine can use standard CAD/CAM software such as: Master Cam Ci-matron PE UG.
Usually think of Ci-matron milling machine tool path a little better, the new version of the software fully elegant to uniformity of cutting quantity of tool time, especially the moment out of the knife into the work speed and smooth, and the difference of algorithm on inflection point (following Error), the following results and graphic design closer to CAD. Some just uses a lot of intuitive 3D modeling such as Solid-works by IGS were transferred to the CAM processing software. But don't worry, the development speed of the development speed of CAD/CAM is far better than CNC machine.
Because of the particularity of the engraving tool is quite small angle control, using TYPE3 as well.
The machining center is a decent word, but I think the tool storage requirements must be combined with the actual.
The machining center CNC equipment to complete a variety of processes in automatic mode, mainly for some fixed mass production, if we process a lot of box holes and teeth, but also to do almost every day (a minimum volume more than 200) that a selection of machining center for mold industry and small batch production units do not motionless on a machining center, because I've seen too many manufacturers to buy CNC milling machining center, when to use, use the knife to the numerical control system the cost of speaking is very simple, but the spindle and knife, air compressor and various handle etc. will increase the cost, so for a piece of equipment the difference is more than 100 thousand yuan, and the programming staff to sober. Otherwise, tragedy occurs, the relative number of a lot of problems. The efficiency of the same variety, less than two hundred of the work-piece, try not to use the processing center for the production efficiency is too low.
What is a good way to improve the efficiency, do not use the knife, not caused by human error only automatic tool change, tool system, knife to a dress, a button, direct processing machine, automatic tool setting, error in 0.001~.0003 within m, and automatically change the time than a slow efficiency. If it is a processing center and automatic tool setting device and machine tool without knife library, but automatic tool machine compared to efficiency in the practice of the latter is much higher than the former. Please note that the best brand and good price as the automatic aligning instrument (Mar-poss) is only ten thousand yuan, and is not likely to be damaged, so analysis for domestic mold processing and processing a lot of labor, small batch of industrial parts if considering the price of the use of funds value should not be used for machining center equipment, in addition, the domestic the knife manufacturers basically still a lot of problems. Imports are also quite expensive. (BT40 10 knife library will not be less than 100 thousand yuan).
Will a lot of time to consider the human factors of machine ready time and personnel caused by smart processors losses, we will always remember the need in this regard to remind them. What we should do is how from the processing time of machine tools up to their higher processing efficiency, and reducing possible their spare time. Even zero grinding. High speed cutting equipment is the debut for processors slammed heart events. Don't consider the high cost (about 1 million 500 thousand), a single from the use of speaking I think it must be an old saying goes: it is a savory meat for some people, for others it is a virulent poison, Japanese and good Europeans to spare no effort to the promotion of high speed cutting and let people use their equipment. Of course, some practical practice. In the CNC machine tool industry in 8 years of combat experience told me they should cost around 60~70 million. Such a high profit rate is to let me see their essence. The domestic CNC machine tool for gross profit (30~40%) between. This is reasonable, honest profit. If you want to maintain their high profits at the same time I think could not earn more money. But we must consider the customer service service etc.. I can't believe their service can solve all the problems in 1~2 days. Because our current technology can not achieve "solid fax".
Development should support the domestic machine tool factory from the national industrial revitalization angle. The essence of high speed cutting tool is walking the length in a short period of time to walk. You know Distance = time * speed
The tool that has been fixed in the cutting way of deciding long means that the speed is equal to the unprofitable time.
Because of the high speed cutting machine tool spindle and the tool itself limitation determines that it can not be good, at present the general approach is the first device without the use of high-speed cutting, and second or third can be considered the equipment.
1 put most of the cutting output complete contour milling (heavy cutting) and the rest of the 2~3mm allowance
1) -- Heavy cutting machine, the processing fee is very low
2) - Processing capacity, high precision easy to reach
3) - Cheap tool
4) - Into the high-speed cutting processing, because the object is close to forming, so the first cutting knives are very uniform
5) - Forming quickly and accurately
6) - Free too much grinding, with precise size
7) - Tools are expensive, but time is short, the cutting amount is small, good performance price ratio
8) - Many nuances, such as small angle conductance, careful processing once completed without the help of electric spark
9) - Excellent surface finish (mirror effect)
In view of this, the association of this equipment is the way to win, because the remaining amount of its 2~3 mm in table XY do baffle two calibration G54 complete work-piece clamping problems, and for cutting is not directly in the high speed machine tool is completed.
For CNC milling and machining center because of low speed and high torque according to the requirements, so be sure to spindle gearbox deceleration ratio increases torque low speed and poor accuracy is inevitable to, so unlikely with small radius. For engraving and milling machine spindle to work in the 2~3 million RPM can work normally 2 mu rotary precision, or breaking phenomenon is very serious, so be sure to use the electric spindle, and the spindle motor is one of the. For high speed cutting equipment, requirements of built-in electric spindle, but with a certain torque to the water cooling machine to maintain a constant temperature in the spindle spindle power to more than 7.5~8KW in the low speed, speed to more than 25000RPM.
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