T22***B-TG Single-Column Deep-Hole Boring Special Machine

This machine tool is a specialized deep-hole boring machine, primarily used for continuous or intermittent internal cylindrical boring and end-face boring of large workpieces.

Category:

Deep Hole Drilling and Boring Machine Series

Phone:

+8613853419218

Email:

dzjichuang@163.com

Request for Quotation

Keywords:

Deep Hole Drilling and Boring Machine Series

Product Information

This machine tool is a specialized deep-hole boring machine, primarily used for continuous or intermittent internal cylindrical boring as well as end-face boring of large workpieces. The machining process is configured into two functional modules: 1) axial-feed boring of the housing’s internal bore; and 2) radial-feed boring of the housing’s two end faces.
During boring operations, either push-boring or pull-boring processes are employed, with cutting fluid delivered through the outer surface of the boring bar to the cutting zone for cooling and lubrication. The machine bed is integrally cast, offering high rigidity, excellent wear resistance, and superior dimensional stability. Tool feed is controlled by an AC servo drive system that provides stepless speed regulation. The headstock utilizes a DC motor-driven hydraulic automatic gear-shifting mechanism for continuously variable speed control. Support brackets for the boring bar and the worktable are mounted above the guideways. The machine is centrally equipped with a CNC control station, which features all necessary function keys for both programmable and manual operation, as well as an electronic handwheel. This control station can be moved along the machine bed, enabling safe, efficient, and stable workpiece clamping and operation.
This machine tool is specifically designed to meet the boring machining requirements for internal cylindrical surfaces and end faces of large workpieces. It employs a workpiece-fixing, tool-rotating machining configuration. During operation, the workpiece is mounted on a dedicated worktable, and the boring bar is passed through the workpiece’s internal bore. The boring process can be implemented in two modes: (1) the worktable remains stationary while the boring-bar carriage and boring bar move along the bed guideways, driving axial feed of the boring bar; the spindle rotation then drives the boring bar to perform the boring operation on the workpiece. (2) the boring bar is fixed, the worktable moves along the bed guideways, and the spindle rotation drives the boring bar to perform the boring operation on the workpiece.
This equipment is equipped with end-face turning capability. During machining, the radial feed mechanism of the boring tool drives the tool holder to perform radial motion, enabling digitally controlled adjustment of the tool’s diameter. Simultaneously, the boring bar rotates to complete the end-face turning operation.
Our company has specially designed and developed a dedicated cutting tool for this machining process, featuring digital control of simultaneous axial and radial movement, precise diameter adjustment, and automatic radial feed. This tool allows for the interchangeability of square shanks of varying lengths to accommodate hole and end-face machining across different diameter ranges. It offers high precision, flexible adjustment, and the ability to freely adjust the perpendicularity between the end face and the hole, among many other advantages.
Equipment requirements and main types of machined components: Specialized equipment designed for the machining of non-rotating workpieces with extremely stringent requirements for hole accuracy and end-face perpendicularity, including machining of irregularly shaped holes in nuclear power components, large motor housing holes and end faces with strict perpendicularity tolerances, internal bores and end faces of military-grade launchers, as well as complex cylinders and hydraulic cylinders for aircraft carriers. This equipment has been fully recognized and highly praised by the aforementioned user organizations.

Technical Specifications	Parameters
Bore boring diameter range	800 mm, 1200 mm, 1600 mm, 2000 mm, 2500 mm, 3000 mm
Workpiece end-face turning width (single side)	200 mm (customer option)
Wide bed guideway	800 mm, 1000 mm, 1250 mm, 1600 mm
Boring bar bed center height	625 mm, 800 mm, 1000 mm, 1250 mm, 1500 mm, 1800 mm
Maximum workpiece length	1000-8000mm
Maximum workpiece weight	10t
Maximum Boring Torque of the Boring Bar	10 kN·m (maximum single-sided cutting depth of 10 mm)
Main motor power	30 kW, 45 kW, 55 kW
Spindle speed (stepless)	3–120 r/min (forward and reverse)
Worktable feed motor	4 kW, n = 1440 r/min (optional by customer)
Feed motor for the boring bar support at both ends of the workpiece	3KW
Feed rate	1000mm/min
Feed motor (AC servo) for the follow-up support at the tail end of the boring bar	15 Nm, 3.3 kW
Feed rate (consistent with the boring headstock)	1-2500mm/min
Tool radial feed motor (AC servo)	7.3 NM 2.29 kW
Feed rate	1-500mm/min
Machining tolerance grade for internal holes	IT7
Surface roughness of the machined surface	Ra1.6
Perpendicularity of the machined end face to the axis	0.05/1000mm
Machining internal bore cylindricity	0.05/500mm
Boring internal hole straightness	0.05/500mm
Positioning accuracy (two servo axes)	0.05mm
Repeatability (two servo axes)	0.025mm