Reader's Corner talks about how to play the role of CNC machine tools. Chen Zongyu From the current situation, the utility of most CNC equipment is not ideal, and the utilization rate is not high, which directly affects the economic efficiency of enterprises. Now according to the use of numerical control equipment by our factory for many years and achieve better results, it is the premise that the numerical control equipment can play its normal role in the full technical preparation work. The technical preparation work is the key. Mainly to do a good job in two aspects, through investigation and research, to establish a software and hardware environment. To understand the users of CNC machine tools with the same production characteristics in the industry, coordinate and rationalize the structure of production layout; add 1 training intensity to enable operation and programmers to use the performance of CNC machine tools, especially machining centers, and operating systems. Deep understanding and mastery of functional functions is the basis for ensuring the function of CNC machine tools. To do a good job in process assurance, choose a sufficient number of workpieces to meet the needs of CNC equipment processing. Combining with the characteristics of the company's own product processing, through the analysis of the processing parts of the numerical control equipment, the process plan is planned and calculated, especially when the number of CNC machine tool main parts cannot meet the processing needs, it is necessary to plan the supplementary parts and configure the necessary The fixtures and station tools are used to develop the CNC equipment process card to create conditions for determining the tool type specifications to improve the utilization of CNC machine tools. In doing so, it is more realistic to solve the problem that CNC machining does not affect the function of CNC machine tools due to the lack of functions and the number of parts of the tool library capacity, and can effectively improve the utilization of CNC machine tools. 0 Continuous improvement and innovation, improve the actual operating rate of CNC machine tools. The actual starting time of CNC machine tools per unit time is called the actual rate. Only by increasing the actual running time of CNC machine tools can the function of CNC machine tools be used efficiently. To increase the actual rate, it is necessary to reduce the auxiliary time of the processing process as much as possible, which is related to the technical method adopted. In general, the focus is on solving the following questions. 1 Programming is the main work of CNC machine tool processing. For multi-variety, single-piece and small-volume production mode, we know that if you manually program on the machine tool, it is necessary to frequently modify the replacement program and affect the actual running time of the machine. All CNC machine tools are equipped with standard 8232 communication interface, so the microcomputer center can be set up at the production site, so that the microcomputer and the machine tool can realize the communication transmission and online control by using the communication software. All the processing methods are compiled and modified by the technician on the microcomputer. Directly transported to the machine for processing to reduce the auxiliary time required to occupy the machine for program modification and testing. After the joint control, the actual time of the CNC machine tool can be increased by 40. 0. Use of the workpiece of the edger, such as the lower cover 3 and the rotor 4 of the model ceiling fan in the export and export product, when the two workpieces are pressed into a body, the process is to put the lower cover 3 and the rotor 4 that need to be closed into the piping machine. In mode 2. The core 1 is driven downward by the power. The roller die 2 is made to expand outwardly on the inner circumference of the rotor 4. At the same time, the roller rolls the lower cover 3 from the horizontal direction to deform it, such as enlargement, so that the rotor 4 is wrapped at the stepped portion of the size of 6, and closes. After the closing operation is completed, the core 1 moves upward. The roller die 2 releases the inner circular surface of the rotor 4. Then, the lower cover 3 and the rotor 4 which are formed by the closing are taken out. When it is necessary to process the workpieces of different sizes or shapes, the size or shape of the rolling mold 2 and the core 1 can be changed. Zhongzhong Zhiling Postcode Guangzhou 510631 Received date February 2001 Software built database management, through the search query program, the implementation of data management, provides a convenient means for program retrieval calls, practice has proved that this greatly improves the programming Speed ​​and correctness. 2 Improve machining accuracy and improve process methods There are many constraints on CNC machine tool processing. Whether the finished product can achieve the required machining accuracy, it can be considered that CNC equipment is more difficult than ordinary machine tools. If the machining center processes the box parts and establishes the coordinate system, it can only manually convert the single coordinate value or find the coordinates with the edge finder. The quantity is large and easy to make mistakes, and the work is cumbersome. Another example is the machining of long-axis parts by CNC lathes. Due to the large rounded corners of the forming blades, the machining shaft parts have cracks. Due to the clamping of the hydraulic chuck, the thin-walled sleeve parts are not easily controlled by deformation. These will have a negative impact on the use of CNC machine tools. In practice, as long as the process is improved, these questions can be solved. Our approach is to establish a good conversion mathematical model for the intrinsic relationship between the coordinate systems of the box parts. After setting the initial coordinate value by the fixture installation position, the coordinate mathematical relationship is established by the translation and rotation relationship of the dimension space, and then through the microcomputer data processing, the coordinate values ​​of each coordinate system can be quickly obtained and input into the machine tool processing. Based on this, we have developed an automatic program generator for the control of the machining center program. Please read the introduction of the Mechanical Design and Manufacturing Magazine 19991. For typical bushings with high precision requirements, sub-clamping is used, and the blank parts are made into several pieces, and the car is cut after forming. The axial controllable high precision of the CNC machine tool is used to ensure the tolerance of the axial thickness of 0.0,1 and the flatness of the two end faces. The rough machining is separated. When the outer hole is rough, the car is finished at the same time. In order to avoid the resonance point of the machine tool system and ensure the quality of the machined surface of the machine, it is necessary to select a reasonable cutting speed, rough machining to select low speed, fine machining to select high speed, and when finishing the car, it is necessary to cut the large cutting, especially For bushing parts, it is recommended to use an angled slotted small arc angle blade with a small cutting edge to reduce the cutting deformation of the part and improve the fast cutting effect. Reasonable selection of machining tools, improve cutting parameters and machining efficiency, steel casting roughing, select, the company's 0 into 225 blades, the back angle is 0 degrees. The grade has good toughness and hardness, cutting speed up to 180mmin, 0.3mmr cutting distance, maximum cutting depth of 4mm, and blade life of more than 150 times. When finishing, the Japanese Jindu ceramic blade is used. The blade has good red hardness, faster speed and higher durability. The normal processing speed can reach 250mmin, the cutting edge is 0.15, the cutting depth is 0.3, and the service life can reach more than 200 times. The casting is made of CR7025 blade, which is ideal for impact resistance. The long hole machining boring bar is made of cemented carbide anti-vibration arbor. The speed can be organized by iil50mSo using group technology. The replacement of CNC machine tool parts requires more than ten preparations such as fixture adjustment tool replacement proofreading and program reader field debugging. In particular, the hydraulic chuck of the CNC lathe has a small variation range of the clamping diameter, and the claws need to be changed frequently. When the machining center processes different types of box parts, it is necessary to adjust the fixtures. It takes a long time to change each type. Therefore, under typical multi-variety and small-batch production conditions, we use the grouping principle to divide the parts into blank groups of similar parts according to the blank diameter machining elements, so that the parts with diameter or difference of 35101 can be processed simultaneously. No need to adjust the claws, the parts with the same machining elements can be processed at the same time without changing the tool and re-calibrating. According to the calculation, the production efficiency can be increased by more than double. 0 Set up the production mode in line with the factory conditions, give full play to the biggest advantage of CNC machine tools compared with ordinary machine tools in high processing precision, good repeatability and stable processing precision. How to make full use of limited resources, we have adopted the production mode of ordinary machine tools + CNC machine tools. In the arrangement of the process route, we equipped a common lathe for each CNC lathe, and processed it for finishing and turning the chamfering 劈. The vertical center milling and drilling machine is arranged for the machining center, and the rough processing of the non-important surface of the reference surface and the small screw hole is performed. In this way, the advantages of the numerical control machine tool are fully utilized, and at the same time, the following advantages are expanded to expand the number of processing parts of the numerical control machine tool; The overall quality of parts manufacturing in our factory has been upgraded; the rough machining on the ordinary machine tool reduces the processing cost, reduces the consumption of expensive CNC lathe roughing tools, reduces the processing cost by 4, and parallel production shortens the production cycle; The adoption of machine tools is an inevitable trend for industrial manufacturing enterprises to adapt to economic development and improve the quality of product processing, which is related to the direct benefits of enterprises. Through the above measures, the CNC workshop of our factory has undertaken the gold processing of 30 varieties of the whole plant from the initial stage, to 85. The processing efficiency of CNC machine tools has to be processed for 6 days. The production cycle is now 1 day, and the efficiency is 6 times. Many workpieces with guaranteed quality can guarantee a 40% reduction in tool consumption at a level of 1 and 6 levels, a multiplication of production capacity and a reduction in cost. At present, the internal and external processing makes the utilization rate of CNC machine tools up to 92.9, which is suitable for the market demand of high quality and fast delivery of many varieties and small batches. Base editor Ruohe Postcode Jiangsu 224002 Received December 1999 (Finish) Plastic Golf Tee,Golf Training Pole,Golf Putting Mirror,Golf Ball Wire Basket Shenzhen New Gaopin Sports Goods Co,Ltd , https://www.newgaopin.com