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Compound processing of both ends of shaft parts

Compared with ordinary CNC lathes, the turret tool holder of the turning center is equipped with power tools that can rotate milling cutters, drills, and taps. At the same time, the machine tool spindle also has a tool that can accurately index according to CNC programs and coordinate with the X-axis or (and) The Z axis performs interpolation linkage with the C axis function. This kind of 3-axis (X, Z, C) controlled turning center can turn, mill, drill, boring and tap the rotary body in one clamping. It is still the most commonly used rotary body in industrial production. Compound processing machine tools.

 

However, no matter how the single-spindle turning center expands the process range, it still cannot solve the problem of secondary processing of the back side of the rotary body (that is, the processing of the workpiece clamping end) under one clamping. Therefore, a dual-spindle turning center must be used to complete it. The two spindles of a double-spindle turning center are mostly arranged opposite each other on the same axis, so that after processing the main end of the rotary body, the second spindle automatically picks the workpiece from the main spindle to process the clamping end.

Since the processing tasks at the clamping end are generally relatively simple, the second spindle is usually called the sub-spindle, and its power is relatively smaller. The dual-spindle turning center can be equipped with one tool holder, but most of them have two tool holders, which can help improve processing efficiency and fully utilize the potential of the machine tool equipment. The machine is equipped with a main spindle and a sub-spindle facing each other on the same axis above the bed. Generally, the speed of the dual spindles is 0~4000r/min, and both can be controlled by the C-axis. The sub-spindle can also move along the axis. To pick up the workpiece after one end has been processed on the spindle. There are turret tool holders with about ten tool positions above the main spindle and below the sub-spindle. Each tool position on the turret tool holder can be equipped with a power tool with a certain power and a rotation speed of 80 to 8000r/min. The tool rest is controlled by 3 axes (X1, Y1, Z1), and the lower tool rest is controlled by 2 axes (X2, Z2).

The Japanese Okuma TWINSTAR series turning and milling compound CNC machine tools provided by Lansheng include 2 models: TWIN STAR LT200-M and TWIN STAR LT300-M. Has the following performance characteristics:

•Opposing dual spindles, the main and sub-spindles have the same power and the same speed, and the upper and lower tool holders have the same power and the same capabilities.

• Four-axis turning can be performed at the same time. The main and secondary spindles can transfer and clamp the workpiece synchronously without stopping, so that all front and back processing from the blank to the finished product can be completed, greatly shortening the processing cycle of the workpiece and shortening the processing time by 40% %about.

•With milling function, the transmission power of the rotating tool spindle is 5.5kW.

•The double tool holder uses the left and right spindles and the upper and lower composite tool turrets for processing, which can integrate processing processes that previously needed to be divided into multiple processes. Using high-precision linear guides, stable processing accuracy can be maintained even if continuous processing is performed for a long time.

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