Heidelberg HD102V four-color offset press troubleshooting example (on)

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Fault 1: Brake device malfunction, machine speed after starting

Cause: 1 circuit failure; 2 brake device misalignment (too loose); 3 brake device copper pad is damaged.

Repair:

1 Check the brake circuit to eliminate the fault;

2 Loosen the brake to adjust the end cap set screw, adjust the end cap clockwise by an angle, and then tighten the set screw;

3 Carefully disassemble the brake and replace the copper pad If there is no spare part, it can be replaced by 0.3mm thick brass or PS plate. The disassembly and disassembly must be cautious to avoid new failure due to misplacement or poor assembly. Due to space limitations, detailed disassembly and adjustment methods are omitted.

Fault 2: The main engine can't run or it is good or bad, there is heat between them, but the transmission is normal.

Cause:

1 The main motor of the circuit or commutator is faulty;

2 The brake device is out of adjustment (too tight);

3 The brake device is not well maintained, too much dirt, and the chip gap is filled;

4 Cause 2 3 Not repaired in time or other reasons The brake generates too much heat, the inner core steel sheet fails to deform, the resistance increases sharply, and the main engine stops.

Repair:

1 Check the circuit motor to eliminate the fault;

2 Loosen the brake end cap set screw and turn it counterclockwise to a certain angle and then fasten it;

3 Disassemble the brake, clean the parts and assemble according to the correct steps;

4 Replace the steel partially or completely Chips and copper.

Fault 3: When the main engine is running normally, the jog wheel will follow the turn, or the time will stop.

Causes:

1 Circuit failure, or improper contact gap of the limit switch;

2 The clearance between the end face of the excitation wire package and the end face of the jog wheel is too small, the rear displacement is tight or the foreign object is tight, and the friction is followed;

3 Jog device bearing failure;

4 If the time is stopped and the heat is generated, the wheel elastic steel plate is mostly deformed or invalid.

Repair:

1 Inspection circuit and switch;

2 Remove foreign matter, correctly install excitation wire package and jog wheel, so that the gap between the two ends is 0.4

~0.7mm, measured with a feeler gauge, 0.4mm is loose, 0.7mm can be;

3 Check cleaning or replacement of bearings;

4 More change the spring steel piece 3 pieces, which can be measured and painted, but the material elasticity should be appropriate;

5 Replace 3 fastening screws.

Fault 4: The machine is malfunctioning, but the operation function is normal.

Reason:

1 Jog circuit failure;

2 If the clutch reacts with the power supply when it is turned on and off, and is accompanied by heat, the end face of the wheel and the wire package is too large, and the magnetic torque is relatively small, so that the end cover and the wheel are not sucked. Tightly and relatively sliding, the orthogonal cutting magnetic lines generate eddy currents, causing the wheel and coil to heat up. If it is not timely, it will burn out the clutch or spring piece;

3 The braking torque is too large.

Repair:

1 Check the jog circuit;

2 Adjust the clearance between the clutch and the disc, the method is the same as before;

3 Adjust the brake device, the same method as in Example 2.

Fault 5: Jog synchronous toothed belt break

Reason:

1 year of fatigue and break;

2 improper maintenance, oil immersion rubber aging, or accidental force break.

Repair:

1 change the imported parts, part number 00.780.2156 toothed belt;

2 according to the West German DIN standard -33T10x1250 drawing processing (or mapping physical). The material can be selected polyurethane or neoprene, the inner core must use steel wire, otherwise the strength is not enough Polyurethane tape has many advantages such as oil resistance, wear resistance, cold resistance and heat resistance. It is easy to process, just to make molds. Therefore, it is hoped that manufacturers will not blindly copy the molds, resulting in waste, should cooperate with each other, mold sharing;

3 Redesign processing belt Rotating domestic belts;

A. The improved design is a synchronous circular arc gear belt transmission structure (ie, HTD belt transmission, wheel, belt full replacement);

B. The improved design is the national standard ladder toothed belt transmission structure;

C. The improved design is the GB multi-ribbed belt transmission structure;

D. The improved design is a national standard V-belt or universal belt transmission structure.

The main design parameters are: transmission ratio i=8.4; speed n1=450 r/min; power 0.28KW, pulley center distance 315mm, belt thickness 5mm, width 33mm.

The above four improved designs have their own characteristics: A design is the best because it is a modification of the shortcomings of the trapezoidal toothed belt. The arc tooth shape is symmetrically distributed and evenly transmitted to the core wire, so it is synchronized with the trapezoidal tooth. The belt can transmit more torque, and the processing is convenient and the cost is low. It has been developed by scientific research institutions. The C design is also simple and inexpensive, and can transmit a large torque, but the tensioning device must be considered because it is the same as D. It is driven by frictional tension; D design is the simplest, low cost, but the performance is poor, the transmission torque is small (because the tensioning wheel is limited by space), it is easy to slip and wear and wear, and the auxiliary repair time is much. All manufacturers are advised to choose the best overall benefit plan according to local conditions.

Fault 6: The delivery drive is unstable

Reason:

1 The chain is too loose or too tight.

2 The chain is severely worn and fails, the pitch becomes longer, and when the cumulative error is too large, the sprocket can be damaged.

Repair:

1 Check the adjustment of the center distance of the sprocket to make the elastic tight;

2 When the wear is serious, replace the new chain with the figure number: 47.014.015; or the external processing chain according to the D/N standard; or redesign the sprocket chain according to the national standard. . Effect: Compared with the purchase of the imported chain, the cost can be reduced by 24 times, that is, each pair of paper delivery chains.

Fault 7: The delivery tray is oscillating, and the tooth row is skewed.

Reason: The receiving plate shaft seat and the chain connecting piece are seriously worn, sometimes the diameter wear amount is more than 1mm, and the part number is the shaft 00.550.0674 shaft seat 93.014.305F, 93.014.306F.

Repair:

1 Ream the shaft sleeve on the trampoline, use 40Cr as the pin shaft, and quench the grinding;

2 Surveying and mapping of cast steel shaft seat, the drawings are omitted.

Fault 8: The delivery paper is not tight

Causes:

1 The fixing screw is loose;

2 The fang spring is invalid;

3 The tooth is worn;

4 the tooth pad is worn, the part number is 93.014.310.

Repair: 1 tightening screws, processing and replacing wearing parts;

2 chrome plating on the enamel brush, local repair emergency;

3 local adhesion wear layer

Emergency.

Fault 9: rotten paper when the tooth is transferred to the paper

Reasons:

1 The whole row of fangs is uneven, not on the same line;

2 The locating pin of the dentition is loose or cut, and the dent is skewed;

3 The paper is not properly delivered, not a "zero" connection.

Repair:

1 Level the entire row of pads;

2 Replace the pin on the end of the tightened teeth to correct the row of teeth;

3 Adjust the position of the open cam plate;

4 If the cam plate is seriously worn, the adjustment is invalid, there are two methods. Repair: A check the wear condition, calculate the wear amount, first draw the picture and make the sample plate, weld repair or brush plating after the fitter repair; B surveying and drawing processing, work surface wear-resistant treatment (can be enhanced by electric spark, nitriding, etc.).

Fault 10: Receiving paper rises obliquely

Reason: The end of the paper-receiving spring is broken off at one end, and the chain is tangled;

Repair: 1 Reattach the broken spring or change the spring;

2 Reset the chain and balance the ends of the paper table.

Fault 11: The roller cannot be clutched (one or more sets)

Cause:

1 Circuit failure;

2 Clutch piezoelectric magnet in the operating side shield is stuck, broken or burned.

Repair:

1 Eliminate circuit failure;

2 Remove the shield, symptomatic treatment (A. Eliminate the blocking obstacle, B. Remove the burnt electromagnet, re-wind the coil; C. Select the domestic alternative electromagnet, match the disc, Small accessories such as rods and springs, model MQ1-5111, suction 3Kg, voltage 220V, working stroke 25mm).

Fault 12: The duster malfunctions

Reason:

1 The powder potentiometer is broken, part number 00.780.3029;

2 the powder spray pipe is blocked;

3 the powder spray pump is broken.

Repair:

1 Repair or replace the potentiometer, optional substitute parts;

2 nozzle discharge, symptomatic treatment;

3 maintenance and repair powder pump.

Fault 13: The delivery slow motor does not turn

Cause:

1 circuit failure;

2 motor seat fixing screw loose, skewed stuck;

3 motor or shifting device is stuffed with dirt;

4 motor burned out or bearing is damaged.

Repair:

1 Check the circuit and motor to eliminate the fault;

2 Adjust the motor to the position and tighten the base screw;

3 Maintain the repair motor and the shifting device;

4 Replace the worn loss bearing.

Fault 14: The delivery conveyor slow belt is broken, part number 00.580.0744

Reason: The rubber is aging for a long time, and the fatigue is broken.

Repair:

1 Adhesive bonding;

2 Purchase domestic replacement parts or process according to West German D/N3770 standard.

Fault 15: Damage to the belt, pulley and pin of the paper feeding section

Cause: Fatigue damage over time.

Repair:

1 glue bonding;

2 mapping processing, belt wheel optional nylon, plastic or bakelite, pin shaft selection 45 steel.

Fault 16: Large compression spring on the oscillating paper feeder

Cause: Fatigue breaks.

Repair:

1 Use the similar pressure spring or TT402 machine spring to repair the expedition, emergency;

2 surveying and processing.