Although the tool selection is reasonable, the special tools for CNC lathes have been standardized and serialized, but a considerable part of the tools used in the training still require students to sharpen themselves. It is possible to select the tool according to the pattern of the machined part and to accurately sharpen it according to the shape and geometric angle. This is especially important for the tool used on the CNC lathe. If the quality of the sharpened tool is not high, the angle does not meet the requirements, which will directly affect the machining quality, tool life and production efficiency of the part. Such as parts, tools used: 1. Boring knives use high-speed steel, shape, geometric angle should be calculated according to the shape and size of the contour. The outer arc turning tool is made of carbide turning tool with a leading angle of 90 and a tip angle of about 3540.
The node calculates the dimension of the accurate part pattern, but the basic size is marked. For some contours, the node coordinate value needs to be accurately calculated. This is the mathematical processing before programming, and it is also one of the keys of manual programming. The method is to first perform condition analysis, according to the known conditions given by the pattern, and make a certain proportion; then determine the geometric relationship of the graph and calculate. Taking a goblet as an example, there are many nodes that need to be calculated, such as the X values ​​of L and c, d points, and the node coordinate values ​​of the inner contour. The coordinate values ​​of other nodes can be obtained by means of mathematical knowledge such as algebra, trigonometric function and plane geometry. If you can apply the basic knowledge of mathematics flexibly and skillfully, you can effectively solve the practical problems in the calculation.
Programming Skills Programming is the focus of practical teaching. Students can skillfully program according to the shape and precision of the pattern, which is the ultimate goal of teaching. The author's teaching methods are: 1. The initial programming is taught by the teacher, the students comprehend and accept, and the procedures used by the students are compiled by the teacher. For example, the cylindrical cone roughing cycle (G80) of the GSK928TA system can complete the process of entering, retracting and turning of an outer circle or a cone. Such as FANCU, Huazhong, and wide-number GSK980T series system composite turning cycle (G70G76). There are also some local numerical control systems such as the local circulation (G22, G80) of the Changzhou BKC-1 system. More complex local roughing and finishing can be completed with fewer blocks.
If you write in the usual way, you must have a total of 56 blocks. This shows the convenience of the program simplification. However, when using local loop instructions, the key is to determine the starting point of the program loop, such as X59.84 in the N290 section of the loop body. If it is wrong, the size of the part cannot be guaranteed. In severe cases, the knife will be issued and even hit the machine. Machine tools must be skilled in different CNC systems. There are big differences in function settings and panel operation, but the principle is basically the same.
Panel operation should be skilled. First of all, you should be familiar with the function keys and switches of the panel, and be proficient in manual, dry running, automatic mode operation, workpiece coordinate system setting and tool setting. Whether the setting of the knife, the tool offset setting and the workpiece coordinate system are accurate or not directly affects the size of the machined parts is one of the key factors related to the success or failure of the machining. Size control is to be mastered. Machine tool accuracy and errors in tooling operations can cause dimensional errors in part machining. Therefore, when processing the first part of the part, a certain amount of allowance must be left for the test, and the control size can be accurately adjusted after the test. Be flexible in solving practical problems. Some unforeseen problems in the operation of CNC machine tools and turning processes, such as machine tool running faults, machine parameters, procedures, operations, etc., there are many uncertain factors, such as incorrect setting of machining parameters, error in the establishment of coordinate system, Size errors caused by knives, tool wear or chipping.
(Finish)
Glass Edge finish machine LJMB95 is used to carry out rough grinding and chamfering after the cutting of the original glass sheet. With easy and simple operation, low labor intensity and high production efficiency, it is indispensable for safety production of all kinds of windows and doors. It is suitable for the edge-finishing of the raw glass for insulating glass.
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