What are the common problems with wood veneer rotary cutting machines
Wood veneer rotary cutting machine is one of the main equipment for producing plywood, used to process wood segments of a certain length and diameter into continuous veneer strips. However, in practical operation, rotary cutting machines often encounter some problems that affect production efficiency and product quality.
1、 Uneven sheet metal
Uneven sheet metal is one of the common faults of rotary cutting machines. This is usually caused by incorrect blade position, lack of sharpness, small or large blade gap, dry or hard wood, virtual connection of electromagnetic clutch carbon brush, improper adjustment of clearance between the pressure bars on both sides of the cutting table, and other reasons.
The solution includes re sharpening the tool to a sharp edge and polishing it with an oilstone; Adjust the blade position and blade gap to ensure even force distribution during the rotary cutting process of the wood; Check the carbon brush of the electromagnetic clutch to ensure good contact; Adjust the gap between the pressure strips on both sides of the cutting table to maintain it between 0.2-0.5mm.
2、 Uneven sheet metal
Uneven sheet metal is also a common problem with rotary cutting machines. This may be caused by poor tool straightness, excessive roller runout, excessive pressure, severe wood on both sides, or wood that is too thin and bent.
To solve such problems, it is necessary to re sharpen the tool and check the flatness of the blade; Check whether the roller bearings are damaged or have excessive radial clearance, and replace the damaged bearings or calibrate the rollers in a timely manner; Adjust the pressure of the cutting tool and roller on the wood to avoid excessive deformation of the wood; Choose high-quality wood to reduce the impact of yin and yang on the rotary cutting effect; For wood that is too thin and curved, the rotary cutting speed should be appropriately reduced to minimize the deformation of the wood.
3、 Periodic unevenness of sheet metal
The periodic unevenness of the board is usually caused by factors such as excessive weight on the inner and outer surfaces of the board, too low or too high a blade, and excessive clearance between the single and double roller bearings.
To solve such problems, it is necessary to adjust the height of the tool position correctly to ensure even contact between the tool and the wood; Replace the single and double roller bearings with excessive clearance to ensure smooth operation of the rollers; For wood with heavy yin-yang surfaces, pre-treatment should be carried out before rotary cutting, such as adjusting the humidity and temperature of the wood to reduce its impact on the rotary cutting effect.
4、 The remaining wooden shaft has uneven thickness at both ends
The uneven thickness at both ends of the remaining wooden shaft is usually caused by the uneven height of the two ends of the knife, the inconsistent gap between the two ends of the knife, the damage of the single roller bearing, the loosening and falling off of screws, the loosening of the pillow, bottom bar, slide screw, and inconsistent feeding of the screw.
To solve such problems, it is necessary to check and adjust the height and gap of the tool at both ends to ensure even contact between the tool and the wood; Replace damaged single roller bearings and loose screws; Check and tighten the screws of the slide pillow, bottom bar, and slide of the knife table; Adjust the consistency of the screw feed to ensure even force distribution on the wood during the rotary cutting process.
Wood veneer rotary cutting machines may encounter various problems during use, but as long as we master the correct solutions and techniques, we can effectively improve production efficiency and product quality.
