based on the advanced design concept of deep hole processing machine tools at China and abroad, our company has independently developed the TGK-Z series CNC deep hole skiving and burnishing machine tool, which has obtained the utility model patent certifica...

based on the advanced design concept of deep hole processing machine tools at China and abroad, our company has independently developed the TGK-Z series CNC deep hole skiving and burnishing machine tool, which has obtained the utility model patent certificate. The machine tool has high processing efficiency (deep hole skiving and burnishing efficiency is 10-20 times of normal deep hole boring and honing), intelligent operation. It completes the work in one time, but normal deep hole machine needs 2-5 times to finish. The rough and fine boring are combined in one body, and the rough and fine boring is completed in one time by pushing, and after the boring, it will finish burnishing when tools draw back. The roughness of the workpiece is less than Ra0.4um. It can replace the processing technology of ordinary deep hole rough and fine boring and honing. The main features of this machine tool are high processing efficiency, stable performance and intelligent operation.

The machine uses fixed workpiece, tool rotates and feeds processing methods. The machine is equipped with a KND CNC system, and the boring box is driven by an AC servo spindle motor. The spindle bearing adopts high-precision bearings and has high rotation precision. The feed box adopts servo motor and stepless speed regulation. Equipped with high-precision ball screw for high-precision and stable feed of the spindle head. The bed is made of cast bed and linear guide rail with a width of 650mm. The linear guides ensure the overall rigidity and guiding accuracy of the machine. Dedicated hydraulic self-centering clamps ensure the stability of the workpiece during high-speed machining. The machine is equipped with automatic chip removal device and the coolant filtration method adopts three-stage filtration. It is a processing equipment specialized in manufacturing hydraulic cylinders, which is another major innovation in deep hole technology. The machine is equipped with high-efficiency automatic expansion and contraction skiving and burnishing tools (Germany made , Korea made , and China made ). It uses rough-skiving -burnishinging processing to process workpieces up to 6mm. The machine is equipped with a special hydraulic retracting tools system. The system pushes the core rod to make the diameter of the skiving insert and the roller smaller, the tool returns to the pressure head, and the hydraulic system pulls the core rod to return the tool to its original size. This machine is especially suitable for high-volume processing of various hydraulic cylinders and other precision pipe.

Main Technical Specifications TGK25

SPECIFICATIONTGK25
CAPACITYBoring diameterφ250mmMax.boring depth1-12mWorkpiece clamped dia.rangeφ100mm –φ300mm
SPINDLEHeight from spindle center to bed400mmSpindle bord diameterφ65mmTaper of spindle bore85mm 1:20Range of spindle speed40-1000r/min（ two shifts, infinite）
FEEDSFeed speed range(infinte)5-1000mm/minCarriage rapid-moving speed3.5m/min
MOTORSMain motor power45KW/60KWHydraulic pump motor power2.2KWFeed motor power7.5KW AC servoCool pump motor power7.5KWx2
OTHERSRated prdssure of cooling system2.5Mpa（ gear pump）Flow volume of cooling system200L/min two group ,300L/min two groupRated working pressure of hydraulic system6.3MpaMax.axial force on pressure head68KNMax.clamping force by pressure head on workpiece20KNCNCBeijing KND or depending on client request

Machine accuracy:

Precision of bore diameter:

Drilling hole IT8 ~ IT9; Boring hole IT7

Roundness 0.036mm/Ф200mm（ after the fine boring）

Cylindricity 0.05/500mm（ after the fine boring）

Roughness Rough boring ≤Ra6.3um

Fine boring ≤ Ra1.6um

Burnishing ≤ Ra0.4um