The main components of a horizontal metal-cutting band saw machine include: the base; the machine frame and column; the saw beam and transmission mechanism; the guide system; the workpiece clamping mechanism; the blade tensioning device; the material feed rack; the hydraulic transmission system; the electrical control system; and the lubrication and cooling system.
The hydraulic transmission system consists of a hydraulic circuit—comprising pumps, valves, cylinders, an oil tank, piping, and other auxiliary components—which, under electrical control, manages the raising and lowering of the saw beam and the clamping of the workpiece. A speed-control valve allows for stepless adjustment of the feed rate, meeting the requirements for cutting workpieces made of various materials.
The electrical control system comprises a control circuit—consisting of an electrical cabinet, a control panel, junction boxes, limit switches, and electromagnets—that governs the rotation of the saw blade, the movement of the saw beam, and the clamping of the workpiece, ensuring that the machine follows a specific operational sequence to execute a standard cutting cycle.
Before operating the machine, the lubrication points—including the wire brush shaft, worm gear box, drive-side bearing housing, worm shaft bearings, the upper and lower pivot points of the lifting cylinder, and the sliding surfaces and clamping screw of the movable vise—must be lubricated as required. The worm and gear inside the worm gear box are lubricated via an oil bath using No. 30 machine oil, which is added through an oil filler port on the top of the housing. An oil level indicator is provided on the side of the housing; when the saw beam is in its designated position, the oil level should fall between the upper and lower limits marked on the indicator. The oil should be changed after the first month of use, and subsequently every 3 to 6 months. A drain plug is provided at the bottom of the worm gear box for this purpose.
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Horizontal band sawing machine
FAQ
Loader automatically moves forward in neutral.
Troubleshooting methods include: disassembling the forward clutch, thoroughly cleaning the oil passages, and replacing the driving and driven friction plates and other damaged parts. Clean all relevant components and replace the outer sealing ring. Unblock and clean the check valve, and replace the clutch friction plates and inner and outer sealing rings.
Excavator starting and fuel supply issues
If the excavator has difficulty starting, first check the battery power supply and fuel level. Additionally, check the electrical circuits and the connection of the engine starter wires to ensure a smooth start.
Excavator power shortage and abnormal smoke
If the excavator lacks power and emits black smoke, stop working immediately to avoid further damage. Inspect the engine cylinders for damage and take appropriate maintenance measures.
Causes and solutions for excavator stalling during operation
If an excavator suddenly stalls while operating, it may be due to reasons such as low oil level, engine overheating, low coolant level, or overloading. Adjustments and checks should be made according to the specific situation, such as checking the oil level and replenishing it as needed, or adjusting the load to reduce overloading.
The bulldozer cannot start
After normal use and parking, the engine could not be restarted, and no smoke was emitted. The starter motor worked normally, initially indicating a problem in the fuel system. When the manual fuel pump was used, the pumped fuel volume was sufficient, there was no air in the fuel flow, and the manual pump worked quickly. This indicated a normal fuel supply, no blockage in the fuel system, and no air leaks. Given the engine was relatively new, the fuel injection pump (with its seal intact) was unlikely to be faulty. Finally, the engine stop lever was found to be out of position; manually adjusting it allowed the engine to start normally. The fault was determined to be with the solenoid valve. Replacing the solenoid valve resolved the issue, and the engine started normally.
Horizontal band sawing machine
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