Deep hole drilling and boring machine news
Deep hole drilling and boring machine news
The machining difficulty of deep hole drilling and boring machines lies in variable diameter holes, such as large belly holes, small opening diameters, and large internal machining diameters. The feasible method for machining deep hole variable diameter holes using deep hole boring machines is to use servo motors to control the radial expansion and contraction of the boring tool, thereby achieving changes in the diameter of the boring hole.
Recently, our company received an inquiry from a Hungarian customer asking if they need a large CNC deep hole drilling and boring machine for processing oversized workpieces. The length of the workpiece is 17600mm, and it is a solid workpiece that requires drilling first and then drilling again. The opening diameter is only 200mm and the depth is 1500mm. After the 300mm length gradually decreases, the inner hole diameter becomes 300mm, and the inner wall roughness after precision boring is Ra1.6. The machining dimensions of the workpiece are symmetrical at both ends.
This user is the largest order designed turbine gearbox manufacturer in Hungary.
In response to the special requirements of our customers, and based on our company's years of experience in deep hole tool design and machining, we have specially designed a super large deep hole drilling and boring machine for our customers. The maximum machining depth is 20000mm, the drilling diameter range is Φ 60~Φ 160mm, and the drilling diameter range is Φ 100~Φ 500mm. The main motor and drilling box motor use Siemens 75KW/55KW high-power servo motors.
The precision of the machine after processing is as follows:
Processing hole straightness (after precision machining): less than 0.1/1000mm;
Machining hole deflection (after precision machining): less than 0.5/1000mm.
The wall thickness variation of any cross-section measured by ultrasonic testing shall not exceed 0.3mm and shall be measured at four positions every 500mm along the circumference.
The outer diameter of each shaft segment should be concentric with the central axis, and the total indicator reading (TIR) should be within 0.2mm. The concentricity variation of any one meter axis length shall not exceed 0.08 millimeters TIR.
The electrical control system consists of a numerical control system, an electrical control cabinet, an AC servo drive device, and an electrical control system.
In order to enable the machine to process variable diameter inner holes, we have designed a specialized variable diameter drilling device for users. The drilling device consists of a tool body, a boring bar, a reducer, and a servo motor. The radial feed mechanism in the tool body is mainly used to achieve radial expansion of the inner hole annular groove. The boring bar consists of an outer bar and an inner bar. The outer rod is mainly used to transmit cutting torque, while the inner rod is mainly used to transmit the power of radial feed. The servo motor provides power for radial feed.
Last month, a client came to our company for inspection and negotiation. After several video conferences and comparisons with other deep hole machine tool manufacturers, the customer ultimately ordered our company's machine tools.
