Maintenance of offset printing machine
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Body and surface
First-level maintenance content and requirements
Wipe the inside and outside of the fuselage (including oil pan, dirty disk, shield, etc.) oil and ink accumulation, remove the sundries, paper wool, paper scraps, to achieve the paint, see the color of the iron see
Secondary maintenance content and requirements
1.Same level of maintenance
2. Check the level of the adjustment machine and the position of the paper feed mechanism to the main unit
Transmission part
First-level maintenance content and requirements
1. Check the belt tension and the degree of use, adjust the tension, and replace it with severe wear.
2. Clean the electromagnetic clutch brake pads, check the braking performance, and replace the worn brake pads.
3. Check the fastening status of the keys, pins and fastening bolts of each drive gear.
4. Check the mating status of each drive bearing and the tightening condition of the bridge gear housing
5. The adjustment controls (handles, buttons) of each part should be loose.
Secondary maintenance content and requirements
1. Replace the damaged and failed adjustment parts, the operation parts are sensitive and reliable
2. Clean the two-color bridge gear, the smoothing gear, and replace the severe wear parts.
3. Check the transmission of the two-color axial movement amount of the transmission and the transmission after the kneading
4. Check the worm wheel fastening bolt, the worm end face nut and the bearing for looseness, adjust the worm end face nut and the boat fruit farmer to make it loose.
5. Replace the heavily worn transmission parts and tighten the bolts
Embossed part
First-level maintenance content and requirements
1. Remove the oil from each impression cylinder and keep the rollers clean.
2. Check the impression roller and the bearing wear of the impression cylinder, adjust the gripper to achieve the same force, and proofread the transfer relationship.
3. Check each printing roller thrust bearing. The lock nut should be properly adjusted and tightened.
4. Check the plate cylinder plate bolts and replace the damaged bolts
5. Check if the radial and axial movement of the two-color plate cylinder is normal.
6. Semi-automatic, the machine should check the maneuver relationship of the tipping pin and adjust the pressure of the impression cylinder.
Secondary maintenance content and requirements
1. Repair the impression cylinder, dental pads, bearings, fixing pins
2. Check the wear of the roller clutch cam roller, the swing rod positioning pin, etc., and repair
3. Overhaul the blanket tensioner of the rubber roller
4. Check the matching clearance of each roller bearing bush
5. Overhaul the semi-automatic machine, the machine dump bucket, the swing lever, the small shaft, and replace the gripper pad
Electrical part
First-level maintenance content and requirements
1. Check the performance of electrical components, check the line, there should be no leakage
2. Check the working condition of the carbon brush and adjust the spring force to make it in good contact.
Secondary maintenance content and requirements
1. Repair electrical components to achieve sensitive and reliable
2. Repair the electrical components such as double control, front gauge, detection device, safety bar, paper table lift, etc., and make necessary adjustments.
3. Check the technical status of the main motor, clean the motor, and replace the lubricant
Positioning and delivery part
First-level maintenance content and requirements
1. Remove paper wool and grease on the surface of each part
2. Proofreading rules, pre-regulations, transfer paper maneuvering relationship, semi-automatic procedure machine should be checked for the maneuver relationship of the front of the gripper and the paper hook
3. Adjust the transfer paper to make it open and consistent. Check the degree of wear of the rod and bearing
4. Check for loose fasteners, bolts, keys, and pins.
Secondary maintenance content and requirements
1. Same level
2. Check and repair worn parts
Paper feeding and delivery section
First-level maintenance content and requirements
1. Wipe all parts of the paper machine to remove grease, paper, and air ducts, and clean the paper separator, cylinder piston and suction valve.
2. Check the working condition of the chain roller of the paper feeder, whether the universal joint and pin are loose, and the degree of lubrication of the ball.
3. Check the belt connection, the lubrication of the belt and the tensioner
4. Check all the paper feeding parts, paper pressing and roller rotation are flexible, no stuck phenomenon
5. Check and adjust the double control, safety bar and stacker upper limit
6. Check the tightness of the paper-feeding chain, whether the sprocket, the tooth row, the paper-engager paper-feeding mechanism key pin, and the bolt are loose.
7. Adjust the grip of the gripper and the relationship between the proofreader and the roller
8. Check and adjust the pickup roller gap
Secondary maintenance content and requirements
1. Repair the wear parts of the paper head and the wear parts of the paper feed table lifting mechanism
2. Repair and replace the heavily worn, sharpened paper roller
3. Repair the worn or sprocket of the lifting chain sprocket and the worn or loose parts of the cardboard and paper receiver
4. Trim the various parts of the delivery tray and unblock the delivery brake roller
5. Grind the burrs of the paper slide, replace the worn ball, adjust the gap
Ink and wet part
First-level maintenance content and requirements
1. Remove the dry ink stains on the outer surfaces of the water bucket, the ink fountain and each ink roller and the outer circumference of the shaft.
2. Check the wear of the ink roller, adjusting piece, pendulum fixing sleeve and lock nut
3. Check the movement and wear of the water and ink splicing mechanism
4. Check the wear of semi-automatic machine, procedure machine, proofing machine, shaft head and tile frame
5. Working condition of cam and roller, ratchet and pawl in the uniform ink and uniform water part
Secondary maintenance content and requirements
1. Repairing water supply, ink supply, adjusting the swing frame fixing sleeve, lock nut and other wear parts
2. Check the repair of the ink roller and the ink blade
Lubrication
First-level maintenance content and requirements: check and clean each lubricating device, add grease
Secondary maintenance content and requirements: Replace damaged nozzle oil pipe, repair oil pump, add new oil
Precision check
First-level maintenance content and requirements: not carried out
Secondary maintenance content and requirements:
1. According to the precision content required by the standard
2. If necessary, include planned repairs