Eight steps to get the selection of CNC machine tools

With the development of modern manufacturing technology, it is a general trend for enterprises to choose CNC equipment. At present, the numerical control equipment on the market can be described as dazzling, and how to economically and reasonably select the numerical control equipment suitable for the enterprise has always been a topic of concern. This article completely discusses the issues that should be paid attention to in the selection from the technical point of view.

For a manufacturing enterprise, the improvement of production capacity often starts with technological transformation from the aspects of production management, manufacturing process, production equipment, etc., and these parts are mutually influential and restrictive. In the technical transformation, the selection of production equipment, CNC machine tools, maintenance, procurement, etc. must be considered in what environment, how to manage, how to achieve the best economic effects.

The choice of manufacturing equipment is to manufacture some products. The equipment selected may be used for part of the processing of the product parts, and may also be used for all processes. The level of manufacturing depends first on the design of the process. It will determine the method and means to process it, which in turn determines the basic requirements for the use of equipment. This is also the basis for the technical organization and management of production. After the basic requirements for equipment selection are determined, it is also selected according to the technical level of equipment available on the market. For most small and medium-sized production enterprises, it is a development trend to select CNC machine tools to replace old machine tools or enhance production capacity.

Compared with the performance of both ordinary and CNC machine tools, CNC machine tools have the ability to process complex shaped parts and adapt to a variety of processing objects (flexible); high processing quality, precision and processing efficiency; adapt to CAD/CAM networking, suitable for manufacturing processing information Integrated management; high utilization of equipment and low operating costs.

The choice of CNC machine tools is a comprehensive technical problem, and now it can produce a wide range of equipment, both domestically and abroad. After decades of development, CNC machine tools have evolved into a large family group that can fulfill a variety of processing and manufacturing requirements. How to choose suitable equipment from a wide variety of expensive equipment, how to make these equipment fully play a role in manufacturing and meet the future development of the enterprise, how to correctly and reasonably purchase accessories, tools and software matching with the host Technology, after-sales technical services, etc., so that the procurement of equipment can achieve a better investment ratio ... These problems are the problems that the majority of purchasers must consider and deal with one by one.

First, determine the "family" of typical processing workpieces

Determining which parts to process is the first step in choosing a device. According to the needs of technological transformation and production development, the enterprise determines which parts are available, and those processes are prepared to be completed with new processing equipment, taking into account the long-term planning of product development. Group these parts into groups using group techniques to determine the typical part families that are to be prepared for the main machining object. In the classification, there are often problems such as a large difference in the size of the parts, a large difference in the shape of the parts, and the processing time of various parts greatly exceeds the full-load working hours of the equipment. Therefore, it is necessary to further select a typical workpiece family that determines the production program and is closer to the requirements. . The typical workpiece family can be divided into diamond type (box type), board type, rotary body type (disk, sleeve, shaft, flange) and special-shaped type according to the appearance; it can be divided into ordinary level and precision level according to the processing precision requirements. Wait. The classification of typical parts is clear, and the basic processing equipment is relatively clear.

Second, the design of the process specification of the typical part family

After the machining of the parts, the process planning must be carried out with a new perspective on the process flow, including the transformation of the original process production process, the feasibility of exploring new process methods, and the exploration of modern production management and logistics management. Feasibility, explore the feasibility of using advanced tooling tools to greatly improve production efficiency, explore the rational preparation process of CNC equipment and other equipment (general, special aircraft) on the production line, in order to obtain the best after using CNC machine tools. Process manufacturing process. Below are the reasonable processing techniques for several typical types of parts.

☆Axis parts: milling end face center hole → CNC lathe (roughing) → CNC grinding machine (finishing);

☆Flange and disc parts: CNC lathe (roughing)→ turning center (finishing);

☆ cavity mold parts: general machine tool processing shape and base surface → CNC milling machine processing surface → high-speed CNC milling finishing → polishing or electro-corrosion profile;

☆Board parts: double-axis milling machine or gantry milling machine processing large plane → vertical machining center processing all kinds of holes;

☆Box parts: The bottom surface of the vertical machining center → the horizontal machining center is processed on all sides of the process surface.

Consider the following factors in arranging the process:

(1) Select the shortest processing process.

(2) CNC machine tools have considerable adaptability, but they are not omnipotent. From the economic point of view, each part of the typical workpiece family has an economic batch, and should use more advanced technology on the basis of economic batch.

(3) Try to make full use of the various process characteristics of the machine tool, and strive to maximize the comprehensive processing capability of the CNC machine tool (the process characteristics of multiple processes), and the minimum number of machine tools, minimum process equipment and fixtures should be configured in the production process. .

(4) Consider the balance of various equipment capabilities in the production line or production workshop. As the choice of a single CNC machine tool or the configuration of a production line, a single device cannot completely cover all the processing steps of one workpiece, and must have process transfer with other equipment. The production capacity between the devices should be balanced to meet the production. The comprehensive requirements of the beat, so the number of processes on each equipment, the order of the processing steps, etc. should not only play the special features of each CNC machine tool, but also meet the accuracy requirements. It is also necessary to further consider the process benchmark of the workpieces on each machine. use.

(5) The problem often encountered in arranging CNC machining processes is the contradiction between the process concentration and the principle of process processing. In the use of CNC machine tools, the principle of concentration of processes in which multiple processes are concentrated on one machine tool is generally adopted, in order to improve productivity, shorten the machining cycle of parts, and even hope that the workpieces are completely processed in one loading. However, in fact, for some complex and high precision workpieces, due to thermal deformation during machining, workpiece deformation caused by internal stress, fixture clamping deformation, heat treatment aging and other process factors and process editors, It is difficult to complete all processing at one time. The gradual refinement of the machined parts in the basic process guidelines restricts the number of process concentrates. Properly handling the contradiction between the two is an important part of the CNC machining process.

(6) In the arrangement of the typical workpiece family process, the manual adjustment and inspection of each machine tool and production line should be properly arranged, that is, the impact of manual intervention. Enterprises should determine the degree of manual intervention in the process according to their technical equipment capabilities, technical level and technical transformation input, which determines the automation level and functional requirements for selecting CNC machine tools. Appropriate consideration should be given to the appropriate use of manual adjustments to supplement the ability of enterprises to achieve full automation, and to accurately locate the technological capabilities and equipment levels of enterprises.

Third, the selection of the main features of CNC machine tools

Machine specifications should include model, machine specifications and machine main motor power. Under the premise of determining the content of the process, the choice of the model is clearer. For example, the processing of rotary parts is mainly for the selection of equipment such as lathes, turning centers, CNC grinding machines, etc.; the processing of the box should be mainly vertical or horizontal machining centers.

CNC machine tools have been developed into a wide variety of products that can be widely selected. In the selection of models, the simpler the better, the conditions should be met. For example, turning centers and CNC lathes can machine shaft parts, but the price of a turning center that meets the same processing specifications is several times higher than that of a CNC lathe. If there is no further process requirement, the CNC lathe should be reasonable. In the machining cavity mold parts, the same size CNC milling machine and machining center can meet the basic processing requirements, but the price difference between the two machine tools is 20% to 50%, so the process of changing the tool in the mold processing can be arranged. Machining center, and an optional CNC milling machine that fixes a tool for long-term milling.

The main specifications of CNC machine tools are the stroke range of several CNC axes and the power of the spindle motor. The three basic linear coordinate (X, Y, Z) strokes of the machine tool reflect the machining space allowed by the machine. The two coordinates (X, Z) in the lathe reflect the size of the allowable rotor. In general, the contour size of the machined workpiece should be within the machining space of the machine. For example, if the typical workpiece is a 450 mm × 450 mm × 450 mm case, then a machining center with a work surface size of 500 mm × 500 mm should be selected. The choice of a work surface that is slightly larger than a typical workpiece is considered for mounting fixtures. The machine tool table size and the three linear coordinate strokes have a certain proportional relationship. For the above-mentioned workbench (500 mm × 500 mm), the x-axis stroke is generally (700-800) mm, and the y-axis is (500-700). The mm and z axes are about 500 to 600 mm. Therefore, the size of the work surface basically determines the size of the processing space. In some cases, the workpiece size is allowed to be larger than the coordinate stroke. In this case, the machining area on the part must be within the stroke range, and the allowable bearing capacity of the machine table and the space interference of the workpiece with the machine tool exchange tool must be considered. A series of problems such as interference with accessories such as machine guards.

The main motor power of CNC machine tools can also have various configurations on the same type of machine tool. Under normal circumstances, the cutting rigidity and spindle high-speed performance of the machine tool are reflected. For example, a light machine tool may be 1 to 2 less powerful than a standard machine tool spindle motor. At present, the spindle speed of general machining center is (4000 ~ 8000) r / min, high-speed machine tool vertical machine can reach (20,000 ~ 70,000) r / min, horizontal machine tool (10000 ~ 20000) r / min, its spindle motor power also Doubled. The spindle motor power reflects the cutting efficiency of the machine tool and reflects the cutting rigidity and the overall rigidity of the machine tool from the other side. In modern small and medium-sized CNC machine tools, the mechanical shifting of the headstock has been used less frequently, and often the AC variable speed motor with a large power is directly connected to the spindle, and even the electric spindle structure is adopted. Such a structure is limited in torque at a low speed, that is, the output power of the speed-regulating motor is lowered at a low speed. In order to ensure a low-speed output torque, a high-power motor is used, so that the spindle machine motor of the same-standard machine tool numerical machine machine is several times larger than the ordinary machine tool. When there are a large number of low-speed machining on some typical workpieces of the unit, the low-speed output torque of the selected machine must also be checked. The light machine tool is definitely cheaper in price, and the user is required to comprehensively select the machine tool according to the size of his typical workpiece blank, the cutting ability (metal removal amount per unit time), the required machining accuracy, and the actual tool configuration.

In recent years, the trend of high-speed CNC machine tools has developed rapidly. The spindle has been transferred from several thousand to tens of thousands of revolutions per minute. The rapid moving speed of linear coordinates has risen from (10 to 20) m/min to over 80 m/min. As the price rises, the user unit must make a reasonable choice based on its technical capabilities and supporting capabilities. For example, the maximum speed of the spindle on the vertical machining center can reach (50,000 to 80,000) r/min. Except for some special processing examples, the matching tools are generally expensive. Some high-speed lathes can reach (6000 ~ 8000) r / min or more, at this time the configuration requirements of the turning tool is also very high.

For a small number of special workpieces, only three linear coordinate machining can not meet the requirements, and additional rotary coordinates (A, B, C) or additional work coordinates (U, V, W), etc., can be satisfied in the current machine tool market. However, the price of machine tools will increase a lot, especially for some requirements of multi-axis linkage processing, such as four-axis, five-axis linkage processing, must have comprehensive consideration and arrangement of the corresponding supporting programming software, measurement methods.

Fourth, the choice of machine tool accuracy

The machining accuracy requirements of the key parts of a typical part determine the accuracy level of the selected CNC machine. According to the application, CNC machine tools are divided into simple type, full-function type, ultra-precision type, etc., and the precision that can be achieved is also different. The simple type is also used in some lathes and milling machines. The minimum motion resolution is 0.01mm, and the motion accuracy and machining accuracy are all above (0.03~0.05)mm. The ultra-precision type is used for special processing and its precision can be up to 0.001mm. Here we mainly discuss the most widely used full-function CNC machine tools (mainly machining centers).

According to the precision, it can be divided into ordinary type and precision type. Generally, there are 20 to 30 items of precision inspection items for CNC machine tools, but the most characteristic items are: single axis positioning accuracy, single axis repeat positioning accuracy and two-axis or more linkage processing test. The roundness of the piece.

The positioning accuracy and repeat positioning accuracy comprehensively reflect the comprehensive precision of each moving part of the axis. In particular, repeat positioning accuracy, which reflects the positioning stability of the axis at any positioning point within the stroke, which is a basic indicator to measure whether the shaft can work stably and reliably. At present, the software in the numerical control system has a rich error compensation function, which can stably compensate the systematic errors of each link in the feed transmission chain. For example, the variation of the gap, elastic deformation and contact stiffness of the various links of the transmission chain often reflect different instantaneous movements with the load size of the workbench, the length of the moving distance, and the speed of the moving positioning speed. In some open-loop and semi-closed-loop feed servo systems, the mechanical drive components after the measurement component are affected by various accidental factors, and also have considerable random error effects, such as the actual positioning position of the table caused by the thermal elongation of the ball screw. Drift and so on. In short, if you can choose, then choose the equipment with the best positioning accuracy!

Milling cylindrical surface precision or milling space spiral groove (thread) is a comprehensive evaluation of the machine tool related to the CNC axis (two-axis or three-axis) servo following motion characteristics and numerical control system interpolation function. The evaluation method is to measure the circle of the cylindrical surface. degree. In the CNC machine tool test piece, there is also a milling square square four-edge machining method, and it is also possible to judge the accuracy of the two controllable axes in the linear interpolation motion. When doing this test, the end mill for finishing is mounted on the machine tool spindle, and the circular test piece placed on the workbench is milled. For the small and medium-sized machine tool, the round test piece is generally taken at Ф200~Ф300. Then, the cut test piece is placed on a roundness meter to measure the roundness of the machined surface. There is obvious milling cutter on the milled cylindrical surface to reflect the unstable interpolation speed of the machine; the roundness of the milling has obvious elliptic error, and the gain of the two controllable shaft systems reflecting the interpolation motion is not matched; on the circular surface There is a mark of the stop point at each point of the controllable axis movement direction (in the continuous cutting motion, when the feed tool is stopped at a certain position, a small piece of cut metal is formed on the machined surface) , reflecting that the positive and negative gaps of the axis are not adjusted well.

Single-axis positioning accuracy refers to the error range when positioning at any point within the stroke of the shaft. It directly reflects the machining accuracy of the machine tool, so it is the most important technical index of CNC machine tools. At present, countries around the world have different regulations, definitions, measurement methods and data processing. In the introduction of various CNC machine tool samples, the commonly used standards are American Standard (NAS) and American Machine Tool Manufacturers Association recommended standards. German Standard (VDI), Japanese Standard (JIS), International Organization for Standardization (ISO) and China National Standard (GB). The lowest standard in these standards is the Japanese standard, because its measurement method is based on a single set of stable data, and then the error value is compressed by half with a value of ±, so the positioning accuracy measured by its measurement method tends to be better than The difference measured by other standards is more than doubled.

Although several other standards differ in processing data, they all reflect the accuracy of the measurement positioning according to the statistical law of error. That is, the error of a certain positioning point in a controllable axis stroke of a CNC machine tool should reflect that In the future, the machine will be used for thousands of times in this long-term use, and we can only measure a limited number of times (usually 5 to 7 times).

Fifth, the choice of CNC system

As market demands diversify, machine tool builders often offer the choice of multiple CNC options for the same machine tool or multiple selection options for the CNC system.

The numerical control system of the machine tool configuration provided by the machine tool manufacturer is divided into the mainstream system and the adaptable system. The mainstream system is relatively technically mature, but the user should have other requirements, such as the pursuit of the quality of the brand-name system, hope There are better after-sales technical conditions in China, and the numerical control system used in the user unit is relatively concentrated in several requirements, so as to use the mastering and maintenance parts preparation, so the user unit is willing to configure the CNC system that is trustworthy or relatively familiar.

In the system of choice, the performance difference is very large, which directly affects the price structure of the equipment. Therefore, it is not possible to pursue high-level and new systems one-sidedly, but should mainly meet the performance of the host, and make a comprehensive analysis of system performance and price. Choose the right system. At present, the most famous numerical control systems in the world include Japan's FANUC, Germany's SINUMERIK, France's NUM, Italy's FIDIA, Spain's FAGO and the United States' AB. Major machine tool manufacturers also have their own systems, such as MAZAK, OKUMA, etc. There are also CNC system suppliers such as Aerospace Group, Electromechanical Group, Huazhong University of Science and Technology, Liaoning Blue Sky, Nanjing Dafang Group, and North Kaiqi. Each company also has a series of products of various specifications.

The basic principle of the user selection system is: the performance price ratio is higher, the post-purchase use and maintenance are convenient, and the system has a long service life (the system cannot be eliminated, otherwise the repair spare parts will not be found after several years of use).

In addition to the basic functions, there are many functions to choose from in the CNC system. For the system equipped with the machine tool, the CNC system selection function required for the basic requirements of the machine tool has been selected by the manufacturer. Users can select some according to their own production management, measurement requirements, tool management, programming requirements, etc. The function is included in the order form, such as the DNC interface networking requirements.

Sixth, automatic tool change equipment (ATC), automatic exchange workbench (APC) and tool holder selection configuration

1. ATC's choice

On some CNC machine tools with comprehensive processing capabilities, such as machining centers, turning centers and CNC punching machines with exchange punches, automatic switching devices are the basic features of these devices. The quality of their work is directly related to the quality of the machine. It is also an important part of the investment in equipment (10% to 30% of the cost of the whole machine). Therefore, it is necessary to pay attention to the working quality and tool storage of the ATC automatic tool changer when selecting the host device. At present, the automatic tool changer of the machining center is more standardized. The following is an example of the ATC device of the machining center.

Field experience shows that about 50% of the faults in the machining center are related to the ATC device, but ATC is the basic component to improve the processing efficiency of the equipment. Therefore, it is recommended that the user should choose the structure as simple and reliable as possible. The high ATC can also lower the price of the whole machine accordingly.

The main technical parameters related to the ATC device are described below.

(1) Tool holder model

The tool holder type depends on the specifications of the tool spindle mounting hole. At present, most of the machining center machine spindle holes are made of ISO 7:24 taper holes, commonly used are No. 40, No. 45, No. 50, etc., and there are also No. 30 and No. 35. The smaller the machine tool size, the smaller the tool holder size should be, but the small size tool holder is not good for processing large size holes and long holes. Therefore, if a machine tool with large specifications can be selected, it should be as large as possible. However, the size of the magazine and the time of tool change will be affected. In recent years, both machining centers and CNC milling machines have been developed in the direction of high speed. Many experimental data show that when the spindle speed exceeds 10000r/min, the 7:24 taper hole will increase due to the centrifugal force, which affects the positioning accuracy of the tool holder. To this end, one view is to recommend the HSK series of short taper shank recommended by German VDI. In addition, the tapered taper shank that has been contacted by both the tapered surface and the end surface of some products in Japan, but in centering accuracy and repetition In terms of positioning accuracy, the HSK series is better, and there are currently few manufacturers in China.

For the same tapered surface, there are Japanese BT standard, American CAT standard, German VDI standard, etc. They stipulate that the size of the clamping jaw of the robot is different, and the size of the clamping nail of the shank is also different, so it must be considered when selecting. Complete, for users who already have a certain number of CNC machine tools or users who are going to purchase a batch of CNC machine tools, they should choose a single standard tool holder series that can be used universally.

(2) Tool change time

The tool change time refers to the tool change time, that is, the total time for replacing the used tool and loading a new tool from the spindle. There are two ways to specify the subdivision, namely the tool to tool and the chip to chip. The total tool change time includes the old tool after machining and leaving the machining area to the tool exchange. The time between the new tool entering the new machining. At present, the fastest pure tool change time is about 0.7s, the total tool change time is between 3 and 12s, and the vertical machine tool change time is generally shorter than the horizontal type. Short tool change times mean high machine productivity.

(3) Maximum tool weight

The maximum tool weight refers to the maximum tool weight allowed in the case of automatic tool exchange. The maximum allowable weight of the shank of the 40th taper is 7~8kg, the handle of the 50th handle is 15kg, and some heavy tools can reach 25~30kg. The tool change speed should be slower. The maximum tool diameter and length are primarily limited by the size of the magazine.

(4) Tool magazine capacity

The tool magazine capacity of some machining center machines is often available in several specifications, from a dozen to 40, 60, 100, etc. Some flexible machining units (FMC) have a tool storage capacity of nearly 1,000 after configuring the central tool magazine. As long as the capacity of the tool magazine can meet the basic needs, it is generally not suitable to choose too large, because the capacity is large, the cost of the tool magazine is high, the structure is complex, the failure rate is correspondingly increased, and the tool management is also complicated. In the use of a single machine, when replacing a new workpiece, the operator should clean the tool magazine according to the new process data. The more irrelevant tools in the tool magazine, the more the finishing work will be. The more prone to human error. Therefore, the user should generally calculate the number of tools to be used according to the process analysis of a typical workpiece, and then determine the capacity of the tool magazine. If not considered in a flexible machining unit or a flexible manufacturing system, the general machine tool magazine is used as a basis for selecting the total number of shanks required for one workpiece to be clamped at a time. According to the foreign process analysis of typical workpieces for small and medium-sized machining centers, it is believed that the storage capacity of small and medium-sized machine tools should be between 4 and 48.

In the machine tool incorporated into the flexible manufacturing unit, in order to meet the requirements of multi-work, multi-process simultaneous machining, it is necessary to configure a large-capacity tool magazine. At this time, corresponding tool management measures should be added.

2. Tool holder and tool selection

After the main machine and the automatic tool changer (ATC) are determined, the required tool holder and tool (cutting tool) are selected. The series of tool holders used in CNC machine tools have been standardized, especially for tool holders used in machining centers, such as CAT in the US, BT in Japan, and JT in China. The machining of workpieces by CNC machine tools depends on the cutting tool. However, the connection between the cutting tool and the machine tool, and the clamping position provided to the manipulator when the tool is automatically exchanged must be solved by the tool holder. Therefore, the selection of the tool essentially includes the cutting tool and the knife. The configuration of the handle. The selection of the cutting tool depends on the processing requirements. After the cutting tool is determined, the corresponding tool holder must be configured. For example, the process requires drilling a small hole with a diameter of 6 mm. The cutting tool is a 6 mm diameter straight shank twist drill, and then a picking bit can be selected. Tool holder. Some of the shanks are now equipped with special cutting tools, such as fine shank handles. In short, most of these accessories have been standardized, supplied by specialized production plants, and machine tool users should be reasonably selected according to specific processing objects. Since the range of tool holders is wide, the selection will increase the investment. If the selection is less, it will affect the starting rate of the machine tool, so it should be treated with caution.

For some workpieces with a total batch size of more than several thousand pieces and repeated production, the compound tool can be considered in the process arrangement, that is, the main cutting power of the CNC machine tool is large, the machine tool has good rigidity, and the multi-tool is used for the compound tool. Multi-blade, powerful cutting for increased productivity and reduced production tempo. But a composite tool is much more expensive and becomes a special tool that must be considered when the number of workpieces is sufficient.

In recent years, many new products have been developed on the tools used in CNC machine tools, which greatly enrich the machining process of CNC machine tools, such as universal vertical milling heads, anti-scratch tools, deburring tools, speed increasing heads, thread milling cutters and internal cooling. Tools, etc. (see product catalog for details).

3. Automatic exchange workbench

The automatic exchange workbench is an accessory configured on the host. The number of configurations is 2, 4, 6, 10, etc., except for the dual exchange workbench, which is mainly configured with a flexible manufacturing unit. The configuration of the double exchange workbench can greatly save the auxiliary time of the loading and unloading of the complex parts and improve the starting rate of the machine tool. However, if the equipment is added, the investment must be at least 100,000 yuan. The multi-quantity exchange workbench is used for flexible manufacturing units. It is suitable for 24 hours of people or unmanned management. It is suitable for the alternate production and processing of multi-variety workpieces. Here, we should pay attention to increase the quality inspection measures, otherwise the investment growth of 20% to 50% is uneconomical. of.

Seven, machine selection function and accessories selection

When purchasing CNC machine tools, in addition to the functions and basic components that meet the basic requirements, you should also fully consider the selection function and accessories. The selection principle is: comprehensive configuration, give full play to the maximum potential of the host, and consider the benefits in the near future. For some price increases, but for the convenience of use, it should be fully equipped. The accessory package should ensure that the machine tool can be put into use immediately after it arrives at the scene. It is forbidden to spend hundreds of thousands of dollars or even millions of machines purchased. After the arrival of the goods, the lack of a tens or hundreds of yuan attachments can not be used for a long time. happened.

The selection function of the numerical control system should be practical, not necessarily too much, especially the equipment incorporated into the mass production line should be as simple as possible. For the multi-variety and small-batch production methods, the selection of programming functions should be strengthened, such as Random programming (background programming), motion graphics display, human-machine dialog programming (GPS), macro programming, etc., although the speed of programming can be accelerated, but the cost should be increased accordingly. Another configuration scheme is to simplify the function of programming the CNC system. The automatic programming machine and the communication interface with the CNC system are separately configured. The program processing is done in advance on the programming machine, and then takes a few minutes to be sent to the CNC system. This will further increase the machine start rate.

Many accessories have been developed in improving the processing quality and work reliability, such as automatic measuring devices, contact probes and corresponding measuring software, tool length and wear detection, machine tool thermal deformation compensation software and other accessories. These accessories are selected to require work. Reliable, not one-sided pursuit of novelty. For some auxiliary function accessories, such as cooling, protection and chip removal, the equipment is mainly determined according to the requirements of the field use and process requirements in the future. For example, considering the requirements for processing large-size cast iron parts in the future, it is necessary to use a high-sealing protective cover and a large Flow shower cooling method, paper coolant filter device, etc. In short, choose accessories that are compatible with production capacity.

Eight, technical services

As a high-tech product, CNC machine tools contain multi-disciplinary professional content. It is not enough to apply and repair the complex technical equipment. The application unit itself is not enough, and it is difficult to do. Rely on and utilize the professional team in society. Therefore, when purchasing equipment, you should also consider the purchase of pre-sales and after-sales technical services around the equipment. The purpose is to make the equipment work as soon as possible.

For some new CNC machine users, the most difficult thing is not the lack of funds to buy equipment, but the lack of a high-quality technical team, so new users from the beginning of the selection of equipment, including the subsequent equipment arrival and acceptance, equipment Manpower and technical support are required for operations, programming, mechanical and electrical maintenance. It is very difficult for these conditions to be solved by users in a short period of time. At present, various machine tool manufacturers have generally paid attention to pre-sales and after-sales services of products, assisting users in process analysis of typical workpieces, performing process feasibility tests and undertaking complete sets of technology. Services, including process equipment development, programming, installation and commissioning, trial cutting of the workpiece, until the full production into production, quickly respond to warranty services, for the user to hold various types of technical personnel training.

In short, CNC machines can be used reasonably in enterprises that attach importance to the construction of technical teams and attach importance to the improvement of the quality of employees. Therefore, when selecting a machine tool, it is recommended that users spend a portion of the funds to purchase technical services for their own shortages, so that the equipment can function as soon as possible.

Product categories of Crimping Forming Machine,we are specialized