The traditional maintenance cycle of textile equipment is to carry out maintenance on the equipment according to the prescribed cycle. Major and minor repairs, car cleaning and various overhauls. Periodic maintenance ensures the normal operation of the equipment.
Modern textile equipment mechatronics technology has made great progress. Both domestic and imported textile equipment have its advanced nature. The speed control components are frequency-converted, the overall control is automated, and the lubrication performance is efficient. It has the characteristics of precision machining and high precision in the overall assembly of the equipment. Modern textile equipment is a complex equipment integrating photoelectric technology, laser technology, pneumatic technology and computer technology. If modern textile equipment still adopts periodic planned maintenance, it has certain limitations. Regardless of whether the equipment is in good or bad condition, periodic maintenance will be performed. In quite a few cases, parts will be repeatedly knocked, pried open, polished, and frequently disassembled and replaced. Not only cannot the performance of the equipment be changed, but the tight fitting parts will loosen, the smoothness will decrease, the inherent quality of the parts will cause latent failures, the geometric dimensions will vary, and the service life of the equipment will be reduced. Some parts that can still be used are replaced in advance, some parts are damaged during the disassembly process, and the parts that were originally well-run in are reassembled, destroying the original technical state. Maintenance technology in the traditional sense is also difficult to meet the technical maintenance requirements of modern equipment. Advanced equipment requires modern maintenance concepts and advanced maintenance technology. Regarding the maintenance of modern equipment, we should update our thinking, change the model, and implement condition maintenance.
The concept of condition maintenance is: maintenance is more important than repair. Maintenance should change from a subordinate position to a dominant position. Maintenance work is not only cleaning and lubrication, but also fastener reinforcement and Work content such as inspection tours has a more positive and proactive preventive nature. Preliminary inspection tours, active tracking of signs and determination of abnormal conditions, timely pre-maintenance, and elimination of failures in the bud.
Equipment status has a significant impact on product quality. Doing a good job in equipment maintenance and keeping the equipment in good condition will help: ensure product quality; ensure output; reduce raw materials , accessories, electricity and other consumption; ensure safe production, prevent mechanical and personal accidents; extend the service life of equipment.
Periodic maintenance
According to the principle of prevention first, equipment Maintenance and maintenance should be carried out periodically. Among them, the scope and maintenance forms of carding maintenance are as follows:
Major repair
Except for the frame, all machine parts should be Disassemble, replace, repair, replace worn parts, and reassemble them levelly to achieve the purpose of making it look like new and restoring its original performance.
Minor repairs
The key to disassembly is easy to wear, move, and deform. Components are repaired or replaced and recalibrated to partially restore their original performance.
Partial preservation
Inspection and correction mainly affect product quality and ease moving parts and clean and refuel the entire machine.
Wipe the car
Mainly clean and refuel, take all measures Machinery and maintenance of some minor mechanical defects and some projects to ensure that the equipment is in good condition.
Key maintenance
Inspect and correct issues closely related to product quality Some items that affect the normal operation of the equipment must be ensured to ensure that the equipment is in good condition.
Visiting inspections
Listen, see, feel, Smell to detect abnormal conditions in the operation of the equipment, or listen to the feedback of the workers who are blocking the trains, so that the equipment can be inspected and repaired to eliminate sick operating conditions.
Therefore, the maintenance of carding process equipment should have the following requirements:
① Establish a strict and complete scientific Management System.
② Improve the mechanical status of the carding machine, thoroughly renovate the basic components, and ensure that the technology is on the machine.
③ Make it meet the requirements of “four fast and one accurate” to give full play to the carding and impurity removal performance of the carding machine.
④ Strengthen operation management.
Common knowledge on carding machine equipment maintenance
Flat packaging of carding machine Principle
The flat packaging quality of the equipment is reflected in the accuracy and reliability of the assembly. Assembly accuracy, also known as assembly precision, is mainly reflected in the degree of consistency between the actual assembly specifications and design requirements or process requirements; assembly reliability is mainly reflected in the stability of the connection and cooperation of components after enduring long-term production operations.
Scope of carding flat car
The carding flat car is the Some parts of the carding machine are disassembled, inspected and corrected, and worn parts or kits are repaired and adjusted to maintain the normal use of the carding machine.
Scope of carding flat car: front of machine, rear of machine, cover plate (immovable wall panel). Ensure the “four fast and one accurate” level of the carding machine.
Flat car requirements
Flat: the machine is stable during operation ; Accurate: the verticality, angle, and parallelism must be accurate; Stable: the position of the machine part itself is correct and stable.
Disassembly steps
“From top to bottom, from outside to inside , loosen first and then take it out, take it off in sets.”
Debugging of equipment
Debugging of equipment refers to the adjustment of equipment In terms of both testing and commissioning, at this stage, maintenance must carefully and comprehensively adjust and monitor the equipment.To prevent mechanical and quality accidents caused by negligence in installation.
1) Adjustment
In the later stage of equipment installation, first of all, adjust the positioning and leveling of key components. Make further adjustments in terms of aspects, and then adjust the process part and put it on the machine, such as the distance of the rollers, the pressurization of the cradle, the change of process gears, etc., and also adjust the air volume, channels, etc., and finally focus on the machine part. The effectiveness and sensitivity are adjusted to finally complete the adjustment of the device.
2) Test run
The installation and test run of the equipment is divided into three stages, namely before the test run The inspection, empty test, and physical test are mainly to ensure that the equipment can maintain its due technical level after repair.
Inspection before test run
a) Before the test run, the team should Strictly follow the three-level inspection system to conduct self-inspection, mutual inspection and team leader inspection to ensure the quality of installation;
b) Clean the oil stains on the fuselage with talcum powder or Litide Wipe the powder dry to make the surface smooth;
c) Engage all the gears in preparation for wiping the car.
Test the empty car
a) After checking that everything is correct, turn on the power and drive the empty car Operation;
b) Run the car empty and check whether there are: fuselage vibration, roller jump, rubber roller jump, gear abnormal noise, fuel tank leakage, abnormal noise of spark parts, etc. Check whether the button switch is sensitive and reliable;
c) If any parts are found to be poorly installed during the empty test, the vehicle should be stopped immediately for repairs.
Physical test run
a) Input the semi-finished product into the machine and start the car for physical test run ;
b) Check whether the indicator lights everywhere are sensitive; whether there are any hangups on the roller rubber roller aprons; whether there are hangups on the channels; whether there are blockages in the suction ducts; cleaners Whether the function is good and whether the parts are shaking;
c) Weave a certain amount of products to check whether the products meet the quality requirements.
Acceptance of equipment
1) Installation acceptance of equipment
Equipment installation should meet certain requirements. The installation of textile equipment is generally inspected in accordance with FJJ212-80 cotton textile equipment installation quality inspection standards:
a) The positioning of the machine is accurate, the positioning line width, parallelism and verticality are good, and the positioning lines of each motor, gearbox and protective cover are accurate;
b) Car The size of the foot board is appropriate, in close contact with the foundation, and there is no looseness;
c) The insertion depth and exposed length of the car foot pads (up to two pieces) are appropriate, and there is no looseness;
d) Small difference in hanging wires;
e) Contact between car surface, frame (wall panel), rungs and beams The surface is tight, generally not larger than 0.05 mm;
f) The connections between the support legs, bearing seats and the machined surface of the frame (wall panel) are confidential, generally not larger than 0.05 mm;
g) The positioning pin is not loose;
h) The axial clearance of the sliding bearing shaft is not greater than 0.40 mm;
i) The radial bearing is in close contact with the shaft, bearing seat and tight bushing, and the refueling is moderate;
j) The gear meshing meets the requirements;
k) The sprockets and pulleys are installed in place and cannot be too tight or too loose;
l) The positions of the cam and the rotor are well aligned , the connection is tight;
m) The gears and pulleys meet the process design requirements;
n) The key and the shaft fit well without looseness , exposed phenomenon;
o) The screws and nuts are not loose when installed, and the specifications of bolts, screws, nuts and washers meet the design requirements;
p) The safety device is complete and works well;
q) There are no missing or damaged parts.
2) Test run acceptance of equipment
The equipment has undergone pre-test inspection, empty test, After the physical test run, the complete machine must meet the following requirements to pass the acceptance: ① The machine has no abnormal vibration, no abnormal sound or smell; ② The machine has no abnormal heating; ③ The machine has no abnormal wear; ④ There is no oil leakage, air leakage, Slurry leakage, water leakage, and air leakage; ⑤ The electrical control device works well; ⑥ The power consumption complies with the regulations of the equipment technical documents; ⑦ There are no continuous mechanical defects on the machine; ⑧ The finished and semi-finished products channels are smooth and clean, without hanging or wrapping; ⑨ Each cleaning component works well; ⑩ The quality of the finished product meets the requirements.
3) Equipment acceptance methods
Equipment acceptance methods include: visual inspection; hand feel; Listening; smelling; testing instruments and measuring tools; coloring inspection; using tools for inspection and correction.
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