Reconstruction of CNC Lathe Milling for Heavy Duty Lathes

Modification and maintenance of heavy-duty lathes to increase the transformation of CNC pattern roll milling Qiqihar No. - Machine Tool Plant Liu Bingshan Jiao Hailong Wang Linlin The problem of difficult to process pattern roll pattern on ordinary machine tools and extremely low efficiency CNC of CNC lathe milling machine for heavy duty lathe The pattern roll milling device and the original lathe part each accounted for 6m. After more than three years of use, it showed that the productivity and quality were improved, and good economic and social benefits were received.

1 The use of CNC pattern roll milling device 2 The composition and technical parameters of CNC pattern roll milling device The device consists of indexing head box milling head frame and tailstock. The XZ coordinate movement is controlled by FANUC6-TD numerical control system. The main technical parameters of the pattern hole type automatic circulation processing in the same direction and on the outer surface of the cylinder are as follows: the milling pattern roll hole type range (diameter length) 750mm < 1900mm, the workpiece maximum weight 1. 5t, The height of the king axis is 50mm, the range of the king axis is 0.1~0.291', the angle of the bar is 3°3'3", the moving speed of the Z and X coordinates of the milling head is 0. 1~2700mm/min, the indexing angle of the milling head ±47.5° tailstock sleeve stroke 300mm, indexing head box and milling head servo motor power is 3kW and X1H, Z1.5kW3 CNC pattern roll milling device main structure 3.1 index bed head box index bed box is located in the bed At the right end, the purpose is to mount the workpiece on its faceplate for indexing. Each angle is rotated (the circumferential angle occupied by the adjacent hole in the same direction on the workpiece). There are two basic corners: <2: and 11< 2: These two corners correspond to the aforementioned shapes The direction of the transformation hole shape is 2: and 2: two, and when the two rotation angles are different from the required rotation angle of the workpiece, the right and the overhanging portions of the right and the W axis can be used to solve the problem. The principle is as follows: each time the indexing axis is rotated only once, the different corners of the workpiece are achieved according to the gear pair of different gear ratios. For example, the angle of 2: can be completed by the Ki 22 2 milling head milling head frame. Rotary motion of the knife, CNC linear motion of the X-axis and Z-axis (feed and fast), and also the movement of the milling head of the milling machine for the adjustment of the X-axis and the movement of the spindle of the milling cutter. 3.3 tailstock tailstock is located at the left end of the bed, the tailstock can be moved longitudinally along the bed, and the looseness of the workpiece and the top close to the sleeve in the upper body of the tailstock to complete the action cycle of the 4 milling pattern hole type (1 Firstly, according to the workpiece requirements and the pattern of the pattern hole, the placement position of the changeover switch, that is, 1/411/59 or one of the selected positions of the hanging wheel, will be automatically switched to the automatic cycle position input program (by the hole type). Z coordinate programming and input) select milling cutter The shaft speed (selected by the hanging wheel) and the selected feed speed (the general feed rate is selected at 20mm/min). The first cycle of the operation cycle starts the milling cutter rotation. The milling head frame moves rapidly along the X coordinate. The workpiece is moved to point B, and then the milling head moves the program relationship BC distance to point C at the feed speed. The milling head frame is quickly retracted after the delay moment, and the moving CA distance is up to the point A. The first hole type is processed, in order to process the first 2 hole type, firstly, the milling head frame moves one hole type pitch OD to the left along the Z axis, then repeats the processing order of the first hole type along the X axis, and then moves one Z axis (axial direction) to the left. Pitch processing the third hole type until the leftmost hole type in the line is processed, the indexing head box is indexed, and the leftmost hole type of the second line is processed, and the milling head frame is shifted to the right. The second hole type to the right end of the second line is finished after the hole type is machined, and the third line is processed, and so on (the figure is to make the milling head milling cutter axis 90° to the first hole type direction ( According to the position of the hole type), the indexing switch (the switch for realizing the above two pattern roll holes) Then perform a manual indexing milling head frame to the right, the displacement distance is 1/2 of the hole type axial pitch, start the automatic cycle, the milling cutter rotates and processes according to the step shown in b until the second hole Finally, a hole-type milling direction is completed (completion of the second processing cycle) back, cutter stop point a pattern roll outer cylindrical staggered pattern end of the first pass machining oF: Shan Liu handle JUNIOR first Research on Heavy Machinery of Machine Tool Plant (Editor Jiang Xuewen) (Revised revised period: 1999-

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Adopted the most advanced stainless steel cutting technology with hard alloy&rotating milling