Because the equipment of aluminum plate machining center is much more expensive than ordinary machine tools, so it is more important to choose reasonable machine tools. Correct selection is the key to make good use of machining center and make the equipment of machining center play an important role. When purchasing aluminum plate processing center equipment, it is particularly important to carefully investigate these five key points:
1. Rigidity of processing equipment
Because the rigidity of the machining center equipment directly affects the production efficiency and machining accuracy of the machine tool, the processing speed of the machining center is much higher than that of the ordinary machine tool, the power of the motor is also higher than that of the ordinary machine tool of the same specification, and the rigidity of the structure design is far higher than that of the ordinary machine tool. When ordering, the maximum value of process requirements, awesome torque, power, axial force and feed force can be checked according to the value supplied by the manufacturer. In order to obtain the high stiffness of machine tools, it is often not limited to the size of parts, but to choose the machine tool whose relative part size is larger than 1 ~ 2 specifications.
2. Machining accuracy of processing equipment
Machining accuracy directly affects the quality of products. When many people deny that your machine tool accuracy is not good, it will directly affect the buyer's decision. It should be noted that the concepts of machining accuracy and machine tool accuracy are different. It is wrong to regard the position accuracy of sample or product certificate of manufacturer as machining accuracy of machine tool. The position accuracy indicated on the sample or certificate is the accuracy of the machine itself, while the machining accuracy is the sum of the errors caused by various factors in the whole process system, including the allowable error of the machine tool itself. When selecting the type, the evaluation method of process capability KP can be used as the basis for selecting precision type. Generally speaking, the calculation result should be greater than 1.33.
3. Selection of CNC system for machining equipment
CNC system is the core brain of machining center. CNC function is divided into basic function and selection function. Basic functions are inevitable, and only when the user selects these functions, the selection functions will be provided by the manufacturer. The function of the CNC system must be selected according to the performance requirements of the machine tool. When ordering, all the required functions should not be omitted, and waste caused by low utilization rate should also be avoided. We should also pay attention to the interrelationship between these functions. In the optional CNC system, the performance varies greatly. We should choose according to the needs and not pursue high goals unilaterally, so as to avoid waste. When selecting more than one machine tool, the same manufacturer's numerical control system should be selected as far as possible to make the operation, programming and maintenance more convenient.
4. Number of axes and linkage axes
The number of coordinate axes and linkage axes should meet the requirements of aluminum plate processing. The number of axes is also a sign of the machine level. Generally speaking, the cost of a machine tool with the same manufacturer, specification and precision will increase by about 35% if a standard coordinate axis is added. Although increasing the number of shafts can enhance the function of the machine tool, it is still necessary to pay attention to the process requirements and capital balance.
5. Automatic tool changer and tool storage capacity
The selection of dynamic tool change device mainly considers the time and reliability of tool change. Short tool change time can improve productivity, but tool change time is short. The tool changing device has complex structure, high failure rate and high cost. Overemphasizing the tool changing time will greatly increase the cost and increase the failure rate. According to statistics, about 50% of the failures in machining centers are related to the automatic tool changer. Therefore, in order to reduce the failure rate and cost of the whole machine, automatic tool changer with high reliability should be selected as far as possible under the premise of meeting the requirements of use.
The quality of automatic tool change and the capacity of tool library will directly affect the performance and quality of machining center. The principle of tool library capacity is to meet the needs of complex machining parts for cutting tools.