In manufacturing, how to increase productivity is an eternal topic.
Today's machining has the following characteristics: multi-variety, small batch production; short delivery time; light weight, performance compounding, adding complex shape products. In order to meet this demand, a multi-tasking machine tool came into being. Since the composite machining machine is difficult to repair after failure, the after-sales service requirements for the manufacturer are improved.
The meaning of different forms of composite composite machining machines is to achieve the entire processing from the blank to the finished product on one machine. It can greatly improve the efficiency of multi-variety single-piece and medium-to-small batch processing, and reduce the waiting time and multiple loading and unloading time caused by the conversion of processes between different CNC machine tools. Usually these times account for 40% to 60% of the entire part production cycle. In particular, the multi-tasking machine is a complete machine for a complete machine. In the past, it required 2 to 3 machines. From the analysis of the manufacturing cost of the machine tool, it can save more than twice the cost of steel raw materials; from the equipment investment analysis of the machine tool, it can save more than twice the production area; from the production cost analysis of the machine tool, it can save manpower and power resources It can improve the processing efficiency by more than twice; from the machining precision analysis of the machine tool, the one-time loading of the workpiece can reduce the installation error and greatly improve the machining accuracy.
At the beginning, Japan's multi-tasking machine was based on a lathe, plus milling and strengthening. This is because almost all machining of the lathe is subject to secondary milling and hole machining. The development of composite machining machines was originally aimed at synthesizing these machining processes.
However, the recent multi-tasking machine tool has changed from the original turning machine to the main part of the milling machine, and the use of the machining center has increased.
Turning-based composite machining machines. This type of machine integrates milling, drilling and tapping, boring, grinding, and hobbing and gear shaping in a horizontal turning center and a vertical turning center to become a horizontal or vertical turning and turning compound. Processing machine tools. Representatives are Austrian WF, Japan's MAZAK and Germany's DMG.
Austrian WFL's M65 horizontal turning and milling machine tool has a certain representativeness. The machine adopts the traditional horizontal lathe layout, the bed adopts a high-rigid 60° inclined bed structure, and the guide rail is specially designed large-size linear guide rail with high rigidity and excellent vibration resistance. The left end of the bed is a turning spindle box with a C-axis function. The right end is the tailstock device. The upper part of the inclined bed is a car, milling and boring spindle device, which can perform linear motion and B-axis oscillating motion in the longitudinal direction (Z axis), the lateral direction (X axis), and the radial direction (Y axis). In addition, the B-axis can also be indexed in units of 2.5°, with the ability to perform roughing and milling. The lower part of the inclined bed is a central support that can be controlled in both the longitudinal and lateral directions for end face and bore machining. The workpiece cannot be supported when the tailstock is not used.
Milling-based composite machining machines. This type of machine integrates turning, drilling and tapping, boring, grinding and hobbing and gear shaping on the basis of horizontal machining centers and vertical machining centers. It is a horizontal or vertical milling compound. Processing machine tools. For example, the INé„„TEGREXe-800V/5 and e-1550V10 horizontal milling and turning machine tools of MAZAK of Japan add rotary turning function to the workbench of the five-axis horizontal machining center, which can be used for circular discs in one loading. The parts are fully processed in the process of turning, milling and the like. The INTEé„„GREXe-500HS vertical milling and turning machine has a rotary spindle with chucks at the left and right ends of the machine. The right end of the chuck can be axially extended and retracted, which can be used for top card processing of long shaft parts. At the left and right ends, the machining of the two short shaft parts, such as turning and milling, is performed simultaneously.
In addition to the above two types of more popular multi-tasking machines, there are many other types of multi-tasking machines, such as DMC60S from DMG for bar processing and W-518MT from WILLEMIN in Switzerland. Grinding-based composite machining machines and grinding head rotary (or interchangeable) composite machining machines, and other composite machining machines that combine laser processing, stamping, and heat treatment.
"Software" support is indispensable but the structure of the machine becomes more complicated due to compound machining. The ever-increasing functions and processing contents make processing, vibration and heat generation different, which requires the design of the mechanical structure to keep up with the different situations. Moreover, due to the diversification of functions of the composite processing machine tools, higher requirements are imposed on the corresponding programming, which requires the enterprise to work harder on the service.
Due to the complexity of the machine and the variety of special accessories, maintenance is complicated. As the mechanical structure becomes more complex, the corresponding measures for maintenance and failure are complicated. And customers who purchase machine tools at higher prices have put forward higher requirements for reducing costs and improving efficiency, and some even require equipment to run continuously for 24 hours. In this way, rapid, accurate and uninterrupted maintenance services are also necessary.
In addition, the multi-tasking machine tool needs to avoid the interference of the tool and the workpiece, realize high-precision control and perform complicated control processing, which is bound to make the programming complicated and bulky, which requires high-speed calculation processing and simple operation sequence. Work hard. Moreover, such a high-performance machine tool is indispensable for the operator to be skilled in the operation.


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