Introduce in detail: what are the selection parameters of the special bottom die machine for knife die?

Detailed explanation of selection parameters of special bottom die machine for knife die

In the selection process of special bottom die machine for knife die, the matching degree of parameters directly determines whether the equipment can adapt to the production demand, machining accuracy and long-term use stability of enterprises. It is necessary to consider the five core dimensions of machining range, precision index, dynamic performance, operational adaptability and supporting functions to ensure that the equipment is highly compatible with die-cutting process, order type and capacity planning.

Machining stroke and table size are the basic parameters of type selection, which directly determine the maximum size of the bottom die that can be machined by equipment, and should be determined in combination with the size of the bottom die of mainstream orders of enterprises. Common mesa sizes cover 600mm×900mm, 1200mm×1500mm, 1500mm×2000mm and other specifications. Small-stroke equipment is suitable for small-size bottom die processing such as electronic accessories and small labels to meet the needs of precision die cutting in 3C industry. Large-stroke equipment is aimed at the bottom mold of color box and corrugated box in packaging industry, which can meet the processing needs of large format and complex box type. At the same time, attention should be paid to the bearing capacity and flatness of the table top, and the flatness error of the table top should be controlled within 0.05mm to avoid affecting the engraving accuracy due to the deformation of the table top. The bearing capacity should match the weight of different bottom die materials such as solid wood boards and density boards to prevent the table top from sinking during processing.

Accuracy index is the embodiment of the core competitiveness of the bottom die machine, which directly affects the indentation effect and edge accuracy of die-cutting products. It is necessary to focus on three key parameters: positioning accuracy, repeated positioning accuracy and engraving resolution. Positioning accuracy refers to the deviation between the actual position and the theoretical position when the equipment executes the engraving instruction. The positioning accuracy of a high-quality bottom die machine should be ≤0.01mm to ensure that the dimensional errors of the indentation groove and the positioning groove meet the technological requirements; The accuracy of repeated positioning is related to the consistency of batch processing, and it needs to be ≤0.005mm to avoid the multi-batch bottom die from being common due to repeated positioning deviation; The engraving resolution determines the smoothness of the bottom die surface. The higher the resolution, the flatter the groove wall. Generally, it is necessary to support the engraving resolution of ≥2500DPI to reduce the subsequent manual polishing process. In addition, we need to pay attention to the guide rail material and transmission mode of the equipment. Using high-precision linear guide rail and ball screw transmission equipment can effectively reduce the vibration during operation and further improve the machining accuracy.

Dynamic performance parameters determine the processing efficiency and material adaptability of equipment, mainly including spindle power, spindle speed and feed speed. The spindle power should be selected according to the hardness of the processed materials. For hard materials such as MDF and solid wood, a high-power spindle with a power of more than 5.5kW should be equipped to ensure sufficient cutting force in the carving process and avoid problems such as broken knives and burrs. If soft materials such as sponge pads and grey boards are processed, the spindle of 3.0kW-4.5kW can be selected, giving consideration to efficiency and energy consumption. Spindle speed directly affects cutting efficiency and surface quality. The spindle speed range of conventional bottom die machine is 6000r/min-24000r/min. High speed is suitable for finishing, which can reduce material edge collapse, while low speed is suitable for rough machining, which can improve cutting speed. The feed speed determines the whole machining cycle, so it is necessary to select the equipment that supports the speed regulation function, and adjust the speed according to different machining stages. In rough machining, AG is used to improve the efficiency, and in finishing, the speed is reduced to ensure the accuracy.

Operation adaptability and automation function are the keys to improve production efficiency and reduce labor cost, and attention should be paid to the control system, tool changing mode and auxiliary functions of the equipment. The control system gives priority to the CNC system with strong compatibility, supports the file import of mainstream design software such as CAD and CorelDRAW, and has the function of path optimization, which can automatically plan the engraving path and reduce the idle travel time. Tool changing methods are divided into manual tool changing and automatic tool changing, and manual tool changing can be selected for small batch production, with lower cost; Large-scale and multi-process machining needs to be equipped with an automatic tool changing system. The capacity of the tool magazine is generally 8-16, which can realize the rapid switching of different tools and greatly shorten the tool changing time. In addition, the dust-collecting function of the equipment can not be ignored. High-quality dust collection system can suck away the sawdust and dust produced in the carving process in time, so as to avoid the dust from adhering to the tool or the table top and affect the machining accuracy, and at the same time improve the workshop environment.

Equipment stability and supporting services are the guarantee of long-term use, and attention should be paid to the fuselage structure and after-sales of manufacturers. The fuselage needs to be welded with heavy steel structure, which has good rigidity to prevent resonance during high-speed operation; At the same time, check the cooling system of the equipment. The cooling effect of the spindle and drive system directly affects the service life of the equipment. In the after-sales, it is necessary to choose the manufacturer that provides free installation and debugging, operation training and regular maintenance services to ensure that the equipment failure can be solved in time and reduce the loss of downtime.

To sum up, the selection of special bottom die machine for knife die should be combined with its own production scene, and the equipment with strong adaptability and high cost performance can be selected from the multi-dimensional comprehensive consideration of processing scope, precision, power, operation and stability, so as to provide support for the efficient and accurate production of die-cutting technology.