TGK20-1/TGK28-1/TGK40-1/TGK53-1/TGK63-1/TGK70-1 CNC Scraping and Burnishing Composite Machine

The CNC scraping-and-rolling composite machine tool is designed for processing both hot-rolled steel tubes with substantial machining allowances and cold-drawn steel tubes with minimal allowances. It can perform rough boring, finish boring, and rolling—three operations combined into a single pass—for thick-walled hot-rolled or cold-drawn steel tubes with wall thicknesses exceeding 2 mm, using a simultaneous rotation of workpiece and tool to achieve the desired diameter tolerance. Alternatively, it supports scraping-and-rolling operations in which the workpiece is held stationary while the tool rotates and feeds axially, making it suitable for one-pass scraping-and-rolling of workpieces that cannot be rotated or for thin-walled cold-drawn steel tubes. In addition, the machine excels at high-efficiency rough boring of hot-rolled or forged steel tubes.

Category:

CNC Scraping and Burnishing Machine Series

Phone:

+8613853419218

Email:

dzjichuang@163.com

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Keywords:

CNC Scraping and Burnishing Machine Series

Product Information

The CNC scraping-and-rolling composite machine tool is designed for both heavy-cutting rough machining of hot-rolled steel tubes with substantial material allowances and fine-cutting finishing of cold-drawn steel tubes with minimal material allowances. It can perform a three-step combined operation—rough boring, finish boring, and roll finishing—in a single pass on hot-rolled or cold-drawn steel tubes with thick walls and a diameter allowance exceeding 2 mm, by simultaneously rotating both the workpiece and the cutting tool. Alternatively, it can also accommodate a scraping-and-rolling process in which the workpiece is held stationary while the cutting tool rotates and feeds axially, making it suitable for one-pass scraping-and-rolling of workpieces that cannot be rotated or for thin-walled cold-drawn steel tubes. In addition, the machine is capable of highly efficient rough boring for hot-rolled or forged steel tubes.
After rapid scraping and roll-burnishing, the machining accuracy can reach IT7–8, with a maximum surface roughness of Ra 0.1–0.4 μm, and the machining efficiency is more than five times that of conventional deep-hole machining processes.
The TGK/I series CNC scraping and burnishing composite machine tool offers the following three machining modes:
Dual Rotation: The headstock drives the workpiece to rotate, while the boring bar simultaneously rotates the cutting tool, enabling high-efficiency rough boring of hot-rolled steel tubes or scraping and burnishing operations, thereby achieving high straightness in internal bore rough machining or a three-in-one process combining rough boring, scraping, and burnishing in a single pass.
Single-workpiece rotation: The workpiece is rotated by the headstock, while the boring-spindle box and boring spindle remain stationary. A German-style hydraulic precision boring-and-rolling tool is used to perform a three-step combined machining process—rough boring, scraping, and roll finishing—on hot-rolled steel tubes or thick-walled cold-drawn steel tubes that have already undergone rough boring of the internal bore, thereby producing cylinder barrels with high dimensional accuracy, excellent straightness, and superior internal surface quality.
Single-rotation tooling: The workpiece is held stationary while the boring headstock drives the boring bar to rotate. Pneumatic or hydraulic precision boring and rolling tools are used to perform a combined precision boring and rolling operation on hot-rolled or cold-drawn steel tubes that have already undergone rough boring, resulting in finished cylinder barrels with high dimensional accuracy and superior internal surface quality.
The TGK/I series machine tools are equipped with Siemens CNC systems. The spindle housing features large-diameter, straight-through coolant and chip evacuation, with the spindle bore exceeding the maximum machining diameter to allow direct tool entry into the spindle bore. Both the spindle housing and the boring bar housing are driven by AC servo spindle motors with stepless speed control, and the spindle bearings are high-precision, branded units, ensuring excellent rotational accuracy. The feed box is also driven by an AC servo motor with stepless speed regulation, and its gear–rack feed mechanism offers high rigidity, enabling highly precise and stable feed of the spindle housing. The machine bed is cast from high-quality gray iron, and the dual rectangular flat guideways ensure overall structural rigidity; protective guards are installed on all sides. A dedicated hydraulic self-centering fixture guarantees workpiece stability during high-speed machining. The machine is equipped with an automatic chip conveyor, an oil-temperature cooler, and a magnetic separator to ensure clean recovery and reuse of the cutting fluid.

	TGK20/1, 25/1, 28/1, 40/1	TGK53/1	TGK70/1
Machining diameter range	Φ40–Φ200mm Φ250mm Φ280mm Φ400mm	Φ125–Φ530 mm	Φ250–Φ700mm
Processing depth range	1-20m	1-20m	1-20m
Machine tool guideway width	650mm	800mm	1000mm
Spindle center height	400/500mm	625mm	750mm
Spindle speed range and number of steps	10–500/400 r/min (2 gears, stepless)	10–310 r/min (2 gears, stepless)	10–220 r/min (2 gears, stepless)
Main motor power	45/55/75 kW (servo motor)	75/90 kW (servo motor)	110 kW (servo motor)
Feed rate range	5–3000 mm/min (stepless)	5–3000 mm/min (stepless)	5–3000 mm/min (stepless)
Rapid traverse speed of the tool feed carriage	3-6m/min	3m/min	3m/min
Clamping workpiece diameter range	Φ50–Φ350/400/500 mm	Φ140–Φ650 mm	Φ200–Φ850 mm
Feed motor power	30/40Nm	50Nm	50Nm
Cooling pump motor power	N=5.5/7.5 kW (3 units)	7.5 kW (3 sets)	7.5 kW (3 sets)
Hydraulic pump motor power	1.5 kW, n = 1440 r/min	1.5 kW, n = 1440 r/min	1.5 kW, n = 1440 r/min
Cooling system rated pressure	0.5-1MPa	0.5MPa	0.5MPa
Cooling system flow	800 L/min, 1000 L/min, 2000 L/min	2200L/min	2500L/min
Air supply pressure	≥0.4 MPa	≥0.4 MPa	≥0.4 MPa
CNC system	Siemens of Germany or other