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THG 80 / THG 125

Product catalog summary

Overview: The document provides detailed technical specifications and features of the THG 80 and THG 125 roll lathes, designed by PORĘBA 1798, part of GRUPA RAFAMET. These lathes are primarily used for machining and calibrating rolls in the steel industry.

Basic Parameters: The lathes offer a maximum spindle torque of 50,000 Nm and can handle workpieces weighing up to 30 tonnes. The turning length ranges from 3,000 to 10,000 mm. The design ensures high rigidity, allowing for efficient rough machining and precise finishing operations.

Purpose: The THG series is specifically designed for turning operations, particularly for rolls used in the steel industry, ensuring high productivity and accuracy.

Control System: Equipped with advanced CNC systems, these lathes enable automatic and precise machining. The standard model uses the SIEMENS 840D sl Operate CNC system, while an optional model uses the FANUC 0i-TD system.

Main Features: Key features include a 3-guideway bed, carburized and hardened guideways, a box-type double wall headstock design, and a central lubrication system. The tailstock is made from high-grade grey iron and is equipped to install a 4-jaw chuck.

Standard Execution: The THG 80 model has a swing over bed of Ø 800 mm, while the THG 125 offers Ø 1,250 mm as an option. Both models feature a 4-jaw chuck, a powerful main drive motor, and a comprehensive lubrication and cooling system.

Optional Execution: Options include a larger swing over bed, different CNC systems, and additional equipment like closed-type roller steady rests.

Technical Specifications: Detailed specifications include spindle rotation rates, power supply requirements, and dimensions. The document also outlines the machine's weight and dimensions, which vary based on the turning length.

Additional Equipment: The document lists optional equipment such as closed-type roller steady rests for different diameter ranges.

Catalog excerpts

BASIC PARAMETERS Max. torque on spindle: Max. weight of workpiece between centres: 30 tonnes Turning length: High ridigity of THG roll lathes makes it possible to turn the rolls of high hardness providing high productivity during rough machining and high accuracy during finishing operations. Special design of guideways for carraige and cross-slide travels ensures vibrationfree operation at high torque and low cutting speed. PURPOSE The THG series lathes are designed for workpiece machining in the range of turning in accordance with their specifications, especially for machining and calibration of rolls used in steel industry. CONTROL SYSTEM The application of the state-of-the-art CNC system allows for automatic, precise and productive workpiece machining according to a program. MAIN FEATURES 3-guideway bed with additional guideway supporting carriage Main guideways carburized and hardened up to 60 HRC Bed design makes it possible carriage to pass headstock, steady rests and tailstock Box-type double wall design of headstock guarantees high rigidity Spindle rested on bearings of increased accuracy class Headstock is central lubricated Tailstock body made as high grade grey iron casting T ailstock spindle adapted to install 4-jaw chuck Carriage guided on two bed guideways Longitudinal and crosswise travels on anti-friction material and assisted by central lubrication system Double lamell cross-slide guided on two hardened guideways

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STANDARD EXECUTION Swing over bed Ø 800 mm (THG 80) Turning length 3,000 to 10,000 mm, every 1,000 mm 4-jaw chuck Ø 800 mm Double lamell cross-slide rested on three guideways Power of main drive motor 71 kW (continuous operation) Spindle rotation rates 0.5 to 315 rpm Power supply 3  400 V / 50 Hz SIEMENS 840D sl Operate CNC system Carriage travels (Z axis) driven by backlashless rack & pinion transmission Cross-slide travels (X axis) driver by ball screw and nut system Automatic change of range of spindle rotation rates Central lubrication system controlled by CNC Chip conveyor 6 bar tool cooling...

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