Purchasing new oil pump is the way to improve the numerical control efficiency of oil pump, and reforming the old oil pump is also an important way to improve the numerical control efficiency of oil pump. If the old grating ruler of current signal is retained, the current signal to voltage signal conversion device needs to be installed to match with the new system, because most of the new system does not support current signal. Now the diesel pump nc transformation process should pay attention to the following problems, for your reference. Because the two costs are similar, saving less money, the oil pump transformation time is about 2 months. According to the use requirements, the original drive device and spindle motor can be replaced by AC digital servo drive system or inverter control. For the price is not high small CNC car, milling machine, it is recommended to update the purchase of new oil pump, not the old oil pump transformation. Numerical control transformation is a better choice for large and high price oil pumps, which can not only save more money, but also shorten the purchase time. The mechanical system of the oil pump should be mapped to make a correct judgment. Good mechanical performance is the basic condition for the successful nc transformation of the oil pump. Otherwise, no matter how good the NC system is, it cannot play its due performance. Due to the characteristics of high processing accuracy and high productivity of oil pump, the proportion of application in manufacturing industry is increasing, which effectively ensures product quality and output. Check whether the technical data is complete and complete. Complete technical data can shorten the technical preparation time of oil pump transformation. For small CNC car, milling machine, oil pump manufacturers generally have spot. To understand the old oil pump NUMERICAL control system manufacturer model, the number of control shafts, spindle, feed shaft drive configuration, spindle motor power, feed shaft motor torque, etc. To understand the old oil pump NUMERICAL control system manufacturer model, the number of control shafts, spindle, feed shaft drive configuration, spindle motor power, feed shaft motor torque, etc. Numerical control system selection to practical principle, there is no need to pursue a high grade and waste money. Special attention should be paid to the content provided by the technical data may be wrong, inconsistent with the actual oil pump. If there are many problems in the mechanical system of the oil pump, such as the defects in the mechanical structure design and manufacture of the old oil pump, the numerical control transformation of the oil pump will not have much significance.
1. Cost-performance analysis of nc transformation and update of oil pump: Before nc transformation of old oil pump, the price of oil pump with the same performance in the market should be investigated.
Two, the status of the oil pump to be transformed: not all the old oil pumps are suitable for numerical control transformation, the oil pump to be transformed to a comprehensive understanding. The old oil pump electrical system is the key work of oil pump reconstruction because of the aging of components. Numerical control transformation of oil pump can reduce the cost of purchasing oil pump and save funds for enterprises. It should also be consistent with the existing CNC system of other oil pumps as far as possible. The advantage of this is that it is convenient for maintenance personnel to maintain the oil pump daily. More centralized NUMERICAL control system is also convenient to reduce the type of spare parts. When choosing CNC systems, we need to consider the products of mainstream manufacturers. For example, FANUC and Siemens systems can be used for foreign CNC systems, while Huazhong and Kandi systems can be used for domestic CNC systems. 4. Transformation scheme of closed-loop control detection device: For the induction synchronizer/ruler of the old oil pump, circular grating and grating ruler can be used to replace it. Attention should be paid to the consistency of the interface signal between the detection element and the system, square wave signal or voltage signal. In recent years, with the expansion of domestic demand for various types of oil pump transformation, oil pump transformation has gradually formed an industry, most of which is the numerical control transformation of old oil pump, but also part of the numerical control transformation of ordinary oil pump. For example, a worktable size of 2000x1800mm, three axis linkage, 60 tool horizontal machining center control is as follows. The original drive system can also be retained, such as the ac analog servo drive system in good condition; The DC servo drive system can keep the dc motor in good condition and use the new DC servo control device to replace the old drive device.
1. Transformation scheme of spindle servo system: The old oil pump spindle control generally adopts DC servo or AC analog servo drive system (generally +/-10V analog signal).
2. Transformation scheme of the feed servo system: similar to the transformation scheme of the main shaft servo system, according to the use requirements, the original drive device and motor can be replaced by the AC digital servo drive system; The original drive system can also be retained, such as the ac analog servo drive system in good condition. The supply time should also be considered when comparing the two prices. Therefore, the mechanical accuracy of the oil pump should be tested before the nc transformation of the oil pump, and the problems found can be repaired during the implementation of the oil pump transformation. The electrical schematic diagram, PLC program, oil pump maintenance manual, hydraulic, pneumatic, lubrication schematic diagram, mechanical assembly drawing, we must carefully study.
3, numerical control system transformation scheme: the transformation of explosion-proof oil pump, the first is the transformation of numerical control system, according to the existing control level of the oil pump, workpiece processing requirements, the financial situation of the enterprise, select the corresponding low, medium and high-grade NUMERICAL control system. This is because some oil pump manufacturers provide a series of models of general drawings, electrical hardware changes of individual oil pumps are not marked on the electrical data, which requires us to compare with the real oil pump, carefully check to avoid mistakes.
Iii. Determination of CNC oil pump transformation scheme: On the basis of surveying and mapping of the oil pump, the overall oil pump transformation scheme is determined according to the requirements of users. If the old grating ruler of current signal is retained, the current signal to voltage signal conversion device needs to be installed to match with the new system, because most of the new system does not support current signal.
