A indústria de dobra de chapas metálicas frequentemente se depara com estes dois tipos de equipamentos: Máquina de dobra CNC and CNC folding machine. So, what's the difference between them? How to choose to use them? First, briefly summarize the main features of the two:
Máquina de dobra CNCOs moldes superior e inferior são fixados respectivamente nas mesas de trabalho superior e inferior da dobradeira, e o movimento relativo da mesa de trabalho acionada hidraulicamente é combinado com o formato dos moldes superior e inferior para realizar a dobra e conformação da chapa.
Máquina de dobrar CNCO motor aciona o cursor superior para comprimir a chapa, e a viga de dobra gira de baixo para cima, fazendo com que a chapa seja dobrada e adquira o formato desejado.
Em termos de conformação de chapas, a dobradeira CNC e a máquina de dobrar CNC são comparadas nos seguintes seis aspectos:
1. O princípio de formação é diferente.
Máquina de dobrar - control the bending angle by controlling the amount of pressure on the upper knife. When bending the short side, the operator needs to hold up most of the external material. When bending large workpieces, two or more More employee collaboration.
Máquina de dobrar - After the plate is laid flat on the worktable, the edge holder is pressed down to fix the plate, and the edge holder is turned up and down to achieve hemming. In all hemming processes of one edge, manual participation is no longer required. Positioning and auxiliary turning and positioning work.
2. Precisão de dobra diferente
Máquina de dobrar - the dimensional accuracy of the control is the dimensional accuracy of the short side of the back gauge positioning. After the bending is completed, the final error accumulates to the inner hollow size. At the same time, the bending angle is controlled by the lower pressure of the upper die. This angle is related to the thickness of the material.
Máquina de dobrar - The dimensional accuracy of the control is that after the first hemming is completed, the first edge is used as the positioning reference. The final controlled size is exactly the inner hollow size required by the customer, and the bending angle is directly controlled by the flanging angle , Has nothing to do with the thickness of the material.
3. Danos por arranhões na superfície do material
Máquina de dobrar - When working, the material will move relative to the lower die, leaving indentations without surface protection. When bending large workpieces, it needs to be turned and moved many times, and scratches will inevitably occur in the process.
Máquina de dobrar - When working, the blank holder and hemming beam cutter do not move relative to the material, thus completely avoiding surface damage. When large workpieces are bent, because the plates are processed flat, all processing on one side of the workpiece can be completed at one time positioning, completely avoiding surface damage.
4. The requirements of workers' technical level are different
Máquina de dobrar - The technical level of the bending workers is relatively higher.
Máquina de dobrar - Programming can be achieved intuitively by drawing with fingers, or the engineer can use software to achieve offline programming and use USB or network connection to import the processing program. After the programming is completed, the main work of the worker becomes simple loading and unloading Work without skilled bending workers.
5. Configuração da ferramenta
Máquina de dobrar - products with different thicknesses and shapes require different upper and lower molds. When realizing some special bending (such as arc) requirements, it is necessary to replace the tool or transfer to another machine tool to achieve this, increasing the transfer and transfer of semi-finished products. Temporary work.
Máquina de dobrar - By configuring a rotatable blank holder beam and installing two sets of blank holder tools at the same time, a single station can complete all the bending procedures. For arc bending or other special bending requirements, there is basically no need to replace the tools, just It can be fully realized by making changes in the program.
6. Vida útil da ferramenta
Máquina de dobrar - due to the relative movement of the workpiece in the die, the tool will wear out and need to be maintained or replaced.
Máquina de dobrar - basically avoids the relative movement between the material and the tool, the tool is almost free from wear for a long time, and the tool life is greatly extended.
7. Sistema de acionamento
Máquina de dobrar - hydraulically driven, which brings more maintenance work and is easily affected by environmental factors.
Máquina de dobrar - adopts all-electric drive design, which reduces maintenance workload and has nothing to do with the use environment, thereby achieving higher bending accuracy.
8. Desvantagens da máquina de dobrar
- Devido aos diferentes princípios de dobra, o ângulo R da máquina de dobrar é maior do que o da máquina de curvar;
- Devido à limitação da mesa de apoio, a peça torneada em ambos os lados não pode ser processada;
- O tamanho da peça de trabalho é limitado pela área de compressão da matriz superior, e peças menores que o tamanho da área de compressão não podem ser processadas;
- A eficiência não é tão alta quanto a da máquina de dobrar;
- Devido às características estruturais da máquina de dobrar e à diversidade de moldes, algumas formas complexas podem ser facilmente produzidas por ela. Em contrapartida, a flexibilidade da máquina de dobrar é baixa;
- As máquinas de dobrar são atualmente muito utilizadas na Europa e nos Estados Unidos. Influenciados pelos conceitos tradicionais de processamento japoneses, geralmente utilizamos o processo de dobra. Não há melhor uso para máquinas de dobrar.
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