Principles for Choosing CNC Machine Tools
Principles for Choosing CNC Machine Tools
1, When choosing the type of CNC machine tool, the first step is to determine the technical requirements and process specifications of the products that the enterprise needs to process. Based on the needs of the process flow and production line rhythm, the type of CNC machine tool should be determined. There are many types of CNC machine tool, and only by selecting the correct type can the CNC machine tool play its best role and achieve the best performance price ratio.
2, Choosing a CNC equipment manufacturing enterprise, the scale, size, and technical strength of the manufacturing enterprise are closely related to whether the CNC equipment can work normally. Choosing an unreasonable manufacturer can lead to many inherent defects and unreasonable aspects of the equipment. It is impossible to understand them in the equipment user manual and when looking at equipment samples. Salespeople and manufacturers always choose the various advantages of the equipment to introduce to customers. The key issue to note is that Taiwanese CNC companies are established quickly, but they also close down quickly. Sometimes, even after the factory has closed down, there are still salespeople selling the equipment. If these issues are not taken into account, the machine tool may be inspected during delivery and within the warranty period. The manufacturer went bankrupt, and after the equipment worked normally, it malfunctioned and could not be repaired, making it impossible for the manufacturer to fulfill the one-year warranty period. At the same time, such factories must have incomplete original and maintenance data for various equipment, making it difficult for users to repair them themselves. Therefore, when choosing a production enterprise, it is advisable to choose manufacturers with higher visibility.
3, Choose equipment from well-known and well-known brands. Among the many CNC equipment manufacturing companies in Taiwan, many with certain strength have their own famous products. For example, in the production of CNC lathes by a certain factory, only one specification of high-quality products has been awarded the title of famous brand, and the performance of other lathes cannot be compared with this specification of CNC lathes. However, in order to increase market share and competitiveness and achieve higher profits, some manufacturers and salespersons take advantage of the weakness of mainland enterprises' lack of understanding of Taiwan's CNC equipment production situation to promote the types of CNC machinery they have never produced to mainland procurement enterprises. In this way, mainland procurement enterprises originally needed a company to have a famous brand of CNC machinery, but in reality, they purchased counterfeit products, that is, CNC equipment of different specifications from the same production enterprise. This type of CNC machine often produces many design defects, causing unnecessary and insurmountable shortcomings for mainland users when the equipment is put into production. This is also one of the main reasons why many purchased equipment cannot be used normally and is idle.
4, Choosing the system used for CNC equipment, commonly referred to as selecting a system, usually involves choosing a system from a well-known brand, but this is not the key. The key lies in the ability of the CNC equipment manufacturer to develop and apply the system itself. Because many systems now have fairly complete functions, manufacturers have certain pricing regulations for various functions of the system (except for general commonly used functions). This means that if the purchasing enterprise does not have a complete understanding of the system functions and does not make requirements for various functions of the system when purchasing equipment, the manufacturer will only provide general commonly used functions. When requesting missing functions from the manufacturer during delivery, the manufacturer will use intellectual property as an excuse to purchase them separately. Some manufacturers themselves have not developed such functions and refuse to provide them based on the contract content, which will greatly limit the user's ability to fully utilize the superiority and efficiency of CNC machine tools. When choosing a system, it is necessary to consider the production of CNC equipment. The ability of enterprises to apply and develop systems and functions. When negotiating, users should fully express their requirements for system functions so that the equipment can fully play its role. At the same time, they can also obtain multifunctional CNC equipment without spending an extra penny. If the enterprise has already purchased Taiwanese machine tools, it will definitely encounter the situation of increasing the price and giving away the function as a friendly gesture at the end of the negotiation. But don't forget that this function should have been included when we purchased the machine tool.
5, Various original data and necessary maintenance materials for the equipment. Before reaching a final agreement, the supplier must provide various raw and maintenance materials for the CNC equipment. By learning and understanding these materials, one can have a certain understanding of the production and design capabilities of the manufacturing plant. If this aspect of work is neglected, it will cause unnecessary trouble after the equipment is put into production. Because the random data of Taiwanese CNC manufacturing enterprises is generally not very complete due to the influence of the production plant's design capabilities. Some companies are relatively well-established, but they also do not provide complete equipment and maintenance information to mainland procurement companies. So, before purchasing equipment, we must have a clear understanding of all the information about the equipment. Generally, CNC equipment includes:
1) Operating instruction manual;
2) Programming instruction manual;
3) Mechanical structure breakdown diagram;
4) Strong current schematic and detailed arrangement diagram;
5) Schematic diagram of weak current structure, detailed arrangement diagram;
6) Hydraulic schematic diagram and detailed hydraulic distribution diagram;
7) Cooling system schematic and detailed distribution connection diagram;
8) Lubrication system schematic and detailed distribution diagram;
9) Schematic diagram and detailed connection arrangement diagram of spindle cooling system;
10) Equipment PC diagram;
11) Equipment system operation manual and maintenance manual;
12) Various parameter setting methods and spindle parameter setting methods, as well as the purpose of the parameters;
13) Equipment debugging methods (including mechanical and electrical);
14) Layout diagrams of various sensors, detailed lists of electrical components, and detailed lists of various consumables;
15) Common troubleshooting methods;
16) Instructions, user manuals, and detailed information on electrical machinery for various purchased parts.
If a CNC manufacturing enterprise can fully possess the above correct information, it should be said that this enterprise has mature design and process capabilities for various interfaces of the system, which can fully ensure that the equipment is put into normal production and provide strong guarantees for the normal use of the equipment.
After completing the above selections, we will enter the delivery and use stage, which is quite important for users because they can have a correct understanding of the accuracy and performance of the equipment when they truly come into contact with it. During the delivery process, some users may not have sufficient knowledge of CNC manufacturing enterprises due to insufficient preparation work, and may not be clear about the completeness and correctness of after-sales service and random data. At the same time, during the delivery process, detailed checks are not made on the correctness of the original machine tool data. After a series of precision tests are passed, the delivery form is signed. This will cause irreparable and significant losses to the user, as signing means that the user acknowledges that the equipment marks the end of the entire procurement contract.
Based on the CNC equipment manufactured by Taiwanese CNC equipment manufacturing companies that I have been exposed to in recent years, it is basically impossible for me to provide completely correct and complete technical information. Some companies can only provide partial system drawing information, and often the provided system drawings, technical information, and machine tools themselves, technical conditions, and system drawings do not match. Therefore, a detailed check must be carried out during the delivery period, and incomplete, non compliant, and missing information must be raised to the supplier. Before receiving a clear response from the supplier, it is not allowed to sign on the delivery form. At the same time, attention should be paid to the correct method of requesting missing information from the supplier, but it must be within the effective claim period of the contract.
CNC equipment may encounter various malfunctions during use, but for each malfunction, the CNC equipment cannot work. If the technical and maintenance information is incomplete or contains incorrect information, it will mislead during the fault handling process, expand the fault, or make it impossible to repair. Random attachments must be comprehensively counted according to the technical requirements for objects and quantities specified in the contract. Without completeness, signatures cannot be obtained. At the same time, the supplier is required to complete the task within the time limit specified in the contract. Never have any illusions, do not be deceived by the supplier's sweet words, and be moved by various empty promises. As a result, once the legal deadline has passed, the supplier will leave and will never be able to fulfill your reasonable demands. Depending on how you find them, the supplier will not pay attention to you. Therefore, for the entire contract process of purchasing CNC equipment, the purchaser can only sign after the static and dynamic accuracy of the CNC equipment, attachments, and other relevant information have been fully and correctly met the requirements of the purchaser. At the same time, it must be completed within the effective time limit stipulated by the law for the contract. If it exceeds the legal time limit for the contract, compensation claims cannot be made to the supplier. Therefore, users must not give up this legitimate weapon to defend their interests.
The free maintenance and repair period for CNC machine tools in Taiwan is one year after the delivery of the machine. During this year, the supplier provides unconditional services to the user. It is important for the user to use the warranty period correctly and reasonably. Reasonable use of this year is of great help to the user's normal use of CNC equipment. According to recent practice, the frequency and service life of CNC equipment failures are closely related, and the types of failures also vary. Calculated based on the equipment working 16 hours a day, the types of failures that occur in the first year are generally system itself, parts, component failures, component damage caused by unreasonable equipment assembly, and equipment congenital design defects. That is to say, equipment failures with inherent deficiencies in design will be exposed in the first year, and the second and third years are the optimal use period for CNC equipment. During this period, if human factors are excluded from the failures, there are generally no failures. After three years, CNC equipment is in a natural wear and tear period. The faults that occur are mainly related to vulnerable and consumable products. At the same time, there may also be comprehensive failures caused by the loss of some basic components.
Based on the above estimation, it is best for users to ensure that the equipment operates at full capacity during the warranty period, and to expose any inherent defects within one year for the manufacturer to solve. This will enable users to obtain a relatively excellent equipment after the warranty period ends. During the warranty period, users must mature their CNC equipment maintenance personnel. In addition to specialized training before the equipment enters the factory, they must also carry out practical operations. This one-year warranty period is the best stage to familiarize themselves with the equipment and actual operations, and strive to become familiar with the various performance, component installation positions, and system operation of the equipment, as well as their interconnection relationships within the first year.
Enterprise maintenance personnel should be brave enough to handle various faults that they have never encountered before within this year. During this period, if the faults are handled well and experience is accumulated, it doesn't matter if they are not handled well. The manufacturer can be hired to repair them, and the maintenance personnel trained by the user should actively cooperate, humbly learn, and absorb the parts that are not understood in the information. Within a year, after several such processes, the CNC equipment maintenance personnel trained by the enterprise can take on the responsibility of ensuring the normal operation of the CNC equipment in the future. So, how to use the free warranty period correctly and reasonably is quite important for users, and using it well can save a lot of money. On the contrary, in order to ensure the normal operation of CNC equipment, a large amount of funds must be spent. At the same time, some Taiwanese CNC equipment companies do not have maintenance offices in mainland China, which will result in long maintenance cycles and high maintenance costs, and cannot guarantee normal production.
In summary, a detailed explanation has been provided on various issues that may occur during the selection, delivery, and maintenance period. Necessary explanations have been given to users to use their rights correctly and reasonably, and detailed preparations have been made for users to use CNC equipment normally. If these issues are not handled properly, it will cause great losses to the country and users, and even result in the purchase of CNC equipment being unable to play a role in the production of products by users, leading to idle.
