Filling with the body equipment in the CNC machine structure

The turret of the CNC lathe cutting motion CNC lathe is equivalent to the combination of the large carriage and the middle carriage of the ordinary lathe, and the turning tool is installed on the turret. When turning the outer circle, the turret is to be moved in two directions: the turret axial movement cuts the outer circle and the radial movement to achieve the infeed and retract. When the turret moves axially, the distance between each point on the turret and the axis line of the part does not change. When the turret enters the tool radially and retracts, the distance between each point on the turret and the axis line of the part changes.

According to the movement characteristics of the turning of the CNC lathe turret and the programming instructions of the CNC lathe, the tool holder device can be added to the CNC lathe to solve the problems of bending and vibration of the parts when turning the slender shaft parts.刀刀架与刀架结构1-T01号刀位;2-T02号刀位;3-T03号刀位;4-Tower;5-turning tool;6-workpiece;7-locking screw;8 - Bronze screw; 9-bracket; 0-turret swing center The device is composed of a bracket 9, a bronze screw 8, a lock screw 7, a mounting screw, and the like as shown.

Mounting method (1) The bracket 9 is fastened to the turret 4 by means of a turret side seat mounting hole. (2) Accurately adjust the position of the automatic tool change. When changing the tool, make the edge between the tool tip and the two bronze screws as shown. In addition to leaving enough space to accommodate the workpiece to prevent collision with the workpiece, the top of the lower bronze screw can be Leave the workpiece in the direction of the arrow for a distance to prevent the turret from colliding with the workpiece when the turret rotates counterclockwise along the center of rotation 0. (3) When the left-handed knife is used, the bracket opening is installed downward as shown, and when the right-side knife is used, the bracket opening is mounted upward.

Turning technology Bronze screw support and disengagement position (1) Before turning the slender shaft, as shown, install the tool holder, remove the bronze screw in the direction of the arrow, and perform automatic tool change to make the required tool and tool The rack is turned to the horizontal position.

(2) The turning tool starts from the end of the tailstock and axially turns the outer circle of the workpiece by 10mm-15mm with a small feed. At the same time, the operator adjusts the two bronze screws to support the surface of the workpiece and locks the locking screw to balance the radial cutting force. Avoid bending and vibration of the workpiece as shown.

(3) When turning the outer circle to the required length, use the program command M00 (automatic pause), pause the knife, adjust the two bronze screws off the outer circle of the workpiece, and then press the start button (START) to run the subsequent tool change program or Repeat the turning of the outer circle as described in section (2) above.

Precautions (1) G90 is an external circular turning instruction. The retracting process cannot be paused. The operator has no time to adjust the two bronze screws to leave the outer circumference of the workpiece or remove the tool holder, which will interfere with the tool holder and the turning tool. Therefore, it is not suitable to use G90. Here you can use G01Z-F- (linear interpolation) to turn the outer circle. (2) When turning, use a brush to apply a mixture of kerosene and diesel oil on the surface of the workpiece and the blade to reduce the friction between the bronze screw and the workpiece. (3) Regarding the direction of rotation of the turret: When programming, care should be taken to rotate the opening of the tool holder against the workpiece to a horizontal position and to rotate in the opposite direction. As shown, when the bracket opening is installed downward, the turret should be turned clockwise to the horizontal position, and after the turning is completed, the workpiece is rotated counterclockwise. If the bracket opening is mounted upwards, the direction of rotation is reversed.

CNC lathe processing slender shaft when adding the tool holder program example lathe model: WT_15FNUCA_O system, semi-finished parts size: diameter 10.5mm, length 150mm drawing parts size: diameter 10mm, length 150mm program example program description %100 program number N1G40G80G97G21G40- cancel radius compensation; G80- cancel drilling cycle; G97-circumferential speed; G21-mm unit. N6Z-152.F0.05 axial turning outer circle 10mm-15mm while adjusting two bronze screws to support the outer surface of the workpiece, turning length 152mm, feed rate 0.05mm / rev. The N7M00 is automatically paused and the operator adjusts the two bronze screws off the outer surface. The N8T03 operator automatically changes the tool after pressing the START button, and the turret rotates counterclockwise to move the tool holder away from the workpiece.

Conclusion The dimensional accuracy tolerance of the workpiece before installation and the tool holder is 0.2mm and the surface roughness is 6.3. After installation and tool holder, the workpiece dimensional accuracy tolerance is 0.025mm and the surface roughness is 3.2. The use of the device proves that the precision of the finished elongated shaft can be significantly improved and the surface roughness is reduced. This structure has strong versatility and can be installed on similar lathes.

(Finish)

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