The three CNC lathes exhibited by Hardinge Machine Tool Co., Ltd. are all equipped with GEFanuc's OpenFactoryCNC system, connected to a server by Ethernet, and connected to GEFanuc's booth. In addition to showing how to benefit from networking at the Hardinge booth, remote data access to the three machines was also displayed on the GEFanuc booth. The OpoeFactoryCNC system, embedded in an industrial PC, is said to combine the flexibility of PCD hardware with a range of Wimdows-based applications and machine control to make the CNC system a high-performance information center (H9ingh-PerformancelmformationCenter), enabling productivity The increase is maximized to meet the shortest delivery time and lowest cost requirements. The concept of GEFanuc's OpenFacroryCNC includes not only the CNC functions installed on the machine, but also some new functions added to the server via Ethernet, such as obtaining relevant documents related to machine tools, CNC, production scheduling and machining of workpieces. Data, using "shopping programming" ("ShopFloorProgramming" for a CAM professional company in the United States - Gibbs software products) software programming, visual DNC, visual MEM (MachineEventMonitoring) machine event monitoring and local hard disk, PCMCIA standard flash storage Card and other hardware. The entire network leads to the manager, general manager and maintenance manager in charge of production, so that these personnel can keep abreast of the current situation. It is also possible to network existing existing machines. Whether these machines are equipped with GEFanuc's previous systems or CNC systems from other companies, GE Fanuc can network them. The method is said to be screwed onto an industrial PC with "two screws". If it is the company's previous products, you need to add a HSSB (HighSpeedSerialBus, high-speed serial bus) board. In addition, GE has teamed up with CISCO, the world-renowned network equipment manufacturer, to form GECISCO Industrial Networks, which is responsible for any level of network construction in the industrial sector, from a small workshop to a factory and networking of the company's global operations. We also found companies that specialize in networking CNCs, such as e-ManufcturingNetworkslnc.
From the products of the three companies introduced above, we can see:
(1) In the past, machine tool companies only sold machine tools, and CNC systems companies only sold systems. Now some machine tool and system companies sell their products together with the network (including supporting software). The reason is that Mazak said that in the case of multi-variety, single-piece small batch production (in the machinery industry, this production mode accounts for about 70% of the total output value), the cutting time of the machine is only 25%, that is, 75% of the time. Get used. If you only pay attention to the efficiency of a single machine, a single system, just make a contribution on 25%. Only networking can increase 25% to 65% (Maxak's point of view). It can be seen that networking is not an end, but a means of improving production efficiency.
This is also a "set" concept, but it is a high-level set of processing information, and is different from the previous supply.
(2) Software modules that are only networked without corresponding supporting software can't make a difference. It is impossible to increase the cutting time to 65% due to low software function. It is obvious that the software-concentrated knowledge is of importance. The aforementioned software modules (especially Otsuka's KCMAC module contains digital worker skills, which can be accumulated to create new skills, new know-how, etc.) and its integration with production management modules means past data processing. In the transition to knowledge processing, the content and meaning of a large amount of information on the Internet are processed in depth and transformed into directly usable knowledge, which is a high-level application of computers. This shows that the informationization of the entire manufacturing industry is transitioning from low-level data processing to high-level knowledge processing.
(3) Mazak and Daxie both produce machine tools and homemade CNC systems (Mazak takes hardware from a professional factory - Mitsubishi Electric Corporation, and concentrates on developing unique software), and focuses on the manufacture of machine tools. Therefore, the main software modules of the networking support are almost entirely developed for their own applications and are constantly being improved in use. They are full of confidence in their maturity. GEFanuc's software modules contain more mature third-party software on the market, such as Gibbs' CAM software mentioned earlier. But they also include software developed by themselves, such as CIMPLICITY software that collects shop floor data. Whether Mazak, Otsuka or GE Fanuc systems contain PCs (respectively referred to as: Converged PCs, PC-based and embedded PCs), they provide excellent conditions for third-party software, standard hardware, interfaces, and more.
(4) Daxie regards the CNC system as the core of the “IT Plazaâ€. GEFanuc refers to its CNC as a high-performance information center. It can be seen that the CNC system plays an important role in networking.
(5) The essence of the high-level informationization of mechanical processing is to construct the CIMS system from the bottom of the basic equipment to improve productivity. It is better or worse than building a CIMS system from the top down. It seems worth exploring.
Turning and milling combined machining center
Adding a power tool holder to the CNC lathe cutter head allows drilling and milling to form a turning center. Compound machining has been in existence for a long time, but the power of milling, drilling, etc. is too small, and the rotation speed is too low to meet the requirements of some complex rotary parts. Therefore, the high-power, high-speed electric spindle has been used instead of the cutter head. Since only one type of tool can be installed at the same time, like the machining center, the turning center adds a tool magazine and a robot. Whether it is a turning tool (the electric spindle is locked without turning when turning), or the drilling and milling tools are stored in the tool magazine. in. In addition, a Y-axis perpendicular to the X-axis and a B-axis rotating around the Y-axis are added. Although the tool change time far exceeds the turning center, high-speed and high-power milling and turning can be achieved, which is essentially equivalent to turning the lathe and machining center into one, called the turning and milling center. For example, on the IMTS2000, Mazak exhibited the INTEGREX series of turning and milling centers with a milling speed of up to 10,000 r/min and more than 20 kW. Through the turning-milling process, in the demonstration, a large-diameter integral round bar was processed into the crankshaft of an automobile engine in just one clamping in more than 10 minutes. By means of the linkage of the X, Y and C axes, a plurality of planes of the connecting rod journal and the crank are located in different spaces. Of course, this process is too expensive to machine crankshaft materials. Mazak field personnel explained that this method is limited to the trial production of engines and special air compressors produced in some single parts. The main purpose of the performance is to show the power of turning and milling. In the manufacturing industry, especially in the aerospace industry, printing presses, and compressor industries, there are many complex rotating parts. The machine tool industry is no exception. For example, the cutter head of a CNC lathe is a typical representative of complex rotary parts. Mazak's small giant company in Yinchuan, China, is equipped with five turning and milling composite machining centers, accounting for about 17% of the total number of machine tools. A WFL company in Austria specializes in the production of large-scale turning and milling machining centers. It is said that its orders (the subscribers are mostly from airplanes, aerospace, ships, printing presses, etc.) have been full for many years. Parallel-added tandem machines starting from low-level applications continue to be successful; parallel machine tools are entering the field of turning for the first time.
The parallel (6-legged) machine tool (also known as the virtual machine tool), which was exhibited for the first time at the IMTS in 1994 and caused a sensation in the world. After the global follow-up wave that lasted for three years, the "temperature" in the world has already gradually Come down. The two famous pioneers have only been exhibited once or twice. A professional parallel machine company in the UK (others are traditional machine tool companies) has only disappeared after two parallel machine tools were exhibited. This is because parallel machine tools have a series of difficult problems in theory and practice, which are difficult to solve in a short period of time. However, the product of a small Swedish company, NeosRobotics, has already become practical and has sold more than 200 units so far. Its success is due to:
(1) Adopt a parallel and series connection scheme.
The company uses a three-bar (so named Tricept) structure instead of a six-bar structure to solve the three degrees of freedom problem, and the other two degrees of freedom use a mature conventional series mechanism [for C, A (B) axis rotation The composite spindle head] is to be solved. In this way, the difficulty is correspondingly greatly reduced.
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