Computer gong processing route:
(1) the shortest cutting feed route. The cutting feed path is the shortest, which can effectively improve the production efficiency and reduce the tool loss. When arranging the shortest cutting feed route, the rigidity of the workpiece and processing technology should be ensured.
(2) the shortest empty route.
① Use the starting point skillfully. A general example of rough turning with rectangular circulation. The setting of tool setting point a takes into account the need for convenient tool change in the process of finishing turning, so it is set far away from the blank, and at the same time, the tool starting point and tool setting point are overlapped together
② Skillfully set up tool changing point. In order to consider the convenience and safety of tool change, sometimes the tool change point is also set far away from the blank. Then, when the second tool is replaced, the empty travel route of finishing turning must be longer; if the tool change point of the second tool is also set at the no point position in the middle, the empty travel distance can be shortened.
③ The route of “returning to zero” should be arranged reasonably. In order to simplify the calculation process and facilitate the verification, the programmer sometimes returns the end point of each tool to the position of tool setting point by executing the “return to zero” operation command, and then execute the subsequent program. This will increase the distance of the feed path and reduce the production efficiency. Therefore, in order to meet the requirement of the shortest feed path, the distance between the end point of the previous cutter and the starting point of the next cutter should be as short as possible or zero when arranging the “return to zero” route reasonably. In addition, when selecting the command to return to the tool point, on the premise of no interference, the direction of “return to zero” in both directions of x-axis and z-axis is adopted as far as possible, and the “return to zero” route of this function is the shortest.
(3) step cutting feed route of large surplus blank. Two kinds of cutting feed routes of too much stock are listed. It is the wrong step cutting route. Cutting in the order of one bucket and five times is the correct step cutting feed route. Because in the same amount of back knife.
(4) the continuous cutting feed route of the part contour finishing. One or several finishing operations can be arranged for the finish machining of part contour. The finished contour shall be machined continuously by the last tool. At this time, the advance and retreat position of the tool shall be selected appropriately. It is not necessary to arrange cutting, cutting out, tool changing and stopping in the continuous contour, so as to avoid damaging the balance state of the process system due to the sudden change of cutting force, resulting in scratches on the part contour Injuries, abrupt changes in shape or retention of knife marks.
(5) special feeding route. In the NC turning process, in general. The longitudinal feed of the tool is along the negative direction of the coordinate, but sometimes it is not reasonable to arrange the feed path according to the conventional negative direction. It may even damage the workpiece.
2、 Advantages of computer gong processing:
① A large number of tooling is reduced, and complex tooling is not needed to process parts with complex shapes. If you want to change the shape and size of parts, you only need to modify the part processing program, which is suitable for the development and modification of new products.
② The machining quality is stable, the machining precision is high, and the repetition precision is high, which can meet the processing requirements of aircraft.
③ In the case of multi variety and small batch production, the production efficiency is higher, the time of production preparation, machine tool adjustment and process inspection can be reduced, and the cutting time is reduced due to the use of the best cutting amount.
④ It can machine complex surface which is difficult to process by conventional method, and even can process some parts which cannot be observed. The disadvantage of NC machining is the high cost of machine tools, which requires maintenance personnel to have a high level.
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