简体中文
English
Русский
Boring Machining of Key Components for Plate Rolling Machines
Release Time:
2026-10-23
The plate rolling machine is core forging and pressing equipment for bending plates and rolling cylinders and cones. It is widely used in the manufacturing of pressure vessels, pipelines, steel structures, and tanks. Whe
Boring Machine Machining of Key Components of Plate Rolling Machines
Plate rolling machines are core metal forming equipment for bending plates and rolling cylinders and cones, and are widely used in the manufacture of pressure vessels, pipelines, steel structures, and tanks. Whether a plate rolling machine can operate stably under pressure, whether its rollers rotate smoothly, and whether the finished cylinder shells meet roundness requirements depend largely on the machining accuracy of critical hole patterns such as the frame side walls, bearing seat holes, and gearbox housings. Boring machine machining is the core process that ensures this accuracy.
The side walls of a plate rolling machine are the load-bearing skeleton of the entire machine. The left and right side walls contain the bearing mounting holes for the upper roller, lower roller, and side rollers. These holes require strict coaxiality, parallelism, and center-distance dimensional tolerances. If hole positions are offset or coaxiality is poor, the roller shafts will stick and overheat after assembly, bearings will fail quickly, and the plate will be subjected to uneven force during rolling, causing defects such as misalignment, ovality, and bulging in the rolled cylinder shell. For such large-size, multi-hole, long-span box-type side walls, conventional lathes and milling machines can hardly ensure positional accuracy in a single setup; boring machines must be used to complete the machining.
When machining plate rolling machine side walls in the workshop, horizontal boring machines or CNC floor-type boring and milling machines are mostly used. After the workpiece is lifted and clamped, the datum is aligned first. The process is generally divided into three stages: rough boring, semi-finish boring, and finish boring. Rough boring quickly removes excess allowance left after casting or gas cutting, relieves internal stress in the casting, and leaves machining allowance; semi-finish boring corrects positional deviations caused by rough machining and establishes a stable foundation for geometric and positional tolerances; finish boring is the most important step, requiring reasonable control of cutting parameters and use of sufficiently rigid boring bars to reduce vibration and ensure the dimensional accuracy, roundness, and cylindricity of each bearing hole. For some long-span coaxial holes, a rear column is also used to support the boring bar, suppressing tool deflection and chatter marks and ensuring coaxiality of the holes at both ends.
In addition to side wall bearing holes, the gearbox housings, hydraulic cylinder supports, and connecting flange holes supplied with plate rolling machines are also often machined by boring. CNC boring and milling machines can rely on coordinate program positioning to complete combined operations such as boring, drilling, face milling, and tapping in one setup, reducing positioning errors caused by repeated lifting and secondary alignment and providing better consistency in batch production. Old-fashioned conventional boring machines rely on operators using dial indicators and test bars for alignment; they are more suitable for one-off custom models and are also a common machining method used by many small and medium-sized plate rolling machine manufacturers.
Boring machine machining of plate rolling machine parts has clear process advantages. The boring tool can fine-tune the bore diameter to meet the assembly requirements of different bearing sizes; machining multiple related holes in one setup makes it easy to control the parallelism and coaxiality between holes, which is the foundation for smooth operation of a plate rolling machine. However, there are also challenges: side wall castings of plate rolling machines are heavy and have uneven rigidity, making them prone to thermal deformation during machining; hole spans are large and boring bars have long overhangs, which can easily cause vibration and chatter marks on machined surfaces, placing high demands on tooling, cutting fluid, cutting parameters, and operator experience. At thin-walled or relatively thin bearing seat locations, cutting force must also be controlled to prevent extrusion deformation.
In terms of process selection, small holes and through holes with lower accuracy requirements on a plate rolling machine can be drilled and reamed; however, all main roller shaft bearing holes, heavy-load fit holes, and multi-axis parallel hole patterns should preferably use the boring process. A qualified plate rolling machine may look externally like heavy steel plates and rollers, but internally its core is the sets of precision hole patterns machined by boring machines. When hole pattern accuracy is achieved, the rollers rotate freely, the load is evenly distributed, the equipment has a longer service life, and the roundness and straightness of the rolled workpieces can meet production standards for pressure vessels and steel structures.
From conventional three-roll plate rolling machines and four-roll CNC plate rolling machines to universal upper-roll plate rolling machines, no matter how models are upgraded, boring of bearing holes in side walls has always been a key process. The precision machining provided by boring machines lays the foundation for the load-bearing capacity and running accuracy of plate rolling machines and is an indispensable part of plate rolling equipment manufacturing.
Tag:
Related News
Copyright © 2012-202X Nantong Suxi Machinery Manufacturing Co., Ltd. All rights reserved.
