Stick-coating technology has been widely used in China's machinery maintenance industry. Commonly used adhesive coatings include Tiangong series (TG-200～800\+#) adhesive repair agent, American Loctite series (515, 567 sealant and 262 anaerobic adhesive, etc.) adhesives and E series epoxy resin. In the mechanical maintenance process, each has its own characteristics, and plays a role in the restoration and reuse of used components.
E series epoxy resin, such as E-51, 44, 42 has the following characteristics: 1 good comprehensive function, strong bonding strength, strong, good insulation properties, chemical resistance; 2 not only can repair old waste parts, applied to the surface of the workpiece Can also play a role in anti-wear, anti-corrosion; 3 can prevent oil leakage, leakage, leakage; 4 repair parts when there is no heat-affected zone, to prevent deformation of the workpiece; 5 cheap, easy process operation, easy to promote the use of, Obvious economic benefits. Examples are as follows.
1 Repair of the partial collapse of the motor housing
1) Reconstruct a defective piece using a low-carbon steel material in the shape of a motor's gap, and tap the hole.
2) Remove the motor end cap and apply a thin layer of grease on the edge of the end cap end (on the surface corresponding to the repaired part) to prevent it from sticking to the case during tacking.
3) Grind the surrounding surface of the cabinet to expose the metal color, and then clean the surface with acetone and blow dry.
4) Apply a thin film tape to the inner surface of the damaged part of the housing to prevent loss during epoxy application.
5) Install the imitation defect on the notch, cover the end cap and screw it in until it fits properly.
6) In the place to be replenished, including the gap between the defect and the impregnated epoxy resin.
7) A stainless steel wire mesh 1 to 1.5 cm larger than the periphery of the gap (previously cleaned with acetone) is placed on the outer surface of the adhesion section and the mesh is laid on the curved surface so as to be covered with a layer of wire. The oxygen resin can be put into use after it is dried.
The vibrator used in the above method has been used for more than 2 years and is still in good condition. The material spent on the material is less than 2 yuan and it is repaired.
Repair of 2-axis or shaft hole wear When the shaft and the ball bearing bore hole fitting or the ball bearing outer diameter and shaft hole fitting have slight wear, the clearance <0.15mm can be repaired with epoxy resin. We have used some of these processes to repair slightly worn-out pump shafts, electric disc rotors, etc. ?
First, the shaft or shaft hole that matches the bearing is cleaned with acetone to make it free from oil. Then, the prepared epoxy resin is thinly coated on the mating surface of the two, and the ball bearing is carefully inserted into the mating position. Care should be taken when handling: Epoxy resin must not be allowed to flow into the balls and raceways; the axis of the bond should be placed in a vertical plane to obtain high concentricity.
The shaft fittings repaired by the above method have not been found to have loosening after more than one year of operation.
3 Repair of Notches Repairing the severe wear of two shaft holes is a scrap steel cutter. The procedure is as follows.
1) Place the body of the shearing machine on the slide of the lathe, correct the parallelism of the three shaft holes, and increase the worn hole by about 8mm.
2) The car has a steel sleeve whose outer diameter is matched with the large diameter of the hole and the inner diameter is matched with the standard copper sleeve outer diameter. The standard copper is set into the long steel sleeve and the steel sleeve is set into the bore hole.
3) Wash the steel sleeve with the acetone and the hole where the shaft hole of the machine body has not been removed, and dry it and pour the formulated epoxy resin. After being dried, the shaft hole is machined and put into use.
In short, there are many examples, all kinds of adhesive repair examples have successfully shown that the epoxy resin has broad development prospects in the maintenance of construction machinery, and the economic benefits it brings can not but be convinced and amazing!
E series epoxy resin, such as E-51, 44, 42 has the following characteristics: 1 good comprehensive function, strong bonding strength, strong, good insulation properties, chemical resistance; 2 not only can repair old waste parts, applied to the surface of the workpiece Can also play a role in anti-wear, anti-corrosion; 3 can prevent oil leakage, leakage, leakage; 4 repair parts when there is no heat-affected zone, to prevent deformation of the workpiece; 5 cheap, easy process operation, easy to promote the use of, Obvious economic benefits. Examples are as follows.
1 Repair of the partial collapse of the motor housing
1) Reconstruct a defective piece using a low-carbon steel material in the shape of a motor's gap, and tap the hole.
2) Remove the motor end cap and apply a thin layer of grease on the edge of the end cap end (on the surface corresponding to the repaired part) to prevent it from sticking to the case during tacking.
3) Grind the surrounding surface of the cabinet to expose the metal color, and then clean the surface with acetone and blow dry.
4) Apply a thin film tape to the inner surface of the damaged part of the housing to prevent loss during epoxy application.
5) Install the imitation defect on the notch, cover the end cap and screw it in until it fits properly.
6) In the place to be replenished, including the gap between the defect and the impregnated epoxy resin.
7) A stainless steel wire mesh 1 to 1.5 cm larger than the periphery of the gap (previously cleaned with acetone) is placed on the outer surface of the adhesion section and the mesh is laid on the curved surface so as to be covered with a layer of wire. The oxygen resin can be put into use after it is dried.
The vibrator used in the above method has been used for more than 2 years and is still in good condition. The material spent on the material is less than 2 yuan and it is repaired.
Repair of 2-axis or shaft hole wear When the shaft and the ball bearing bore hole fitting or the ball bearing outer diameter and shaft hole fitting have slight wear, the clearance <0.15mm can be repaired with epoxy resin. We have used some of these processes to repair slightly worn-out pump shafts, electric disc rotors, etc. ?
First, the shaft or shaft hole that matches the bearing is cleaned with acetone to make it free from oil. Then, the prepared epoxy resin is thinly coated on the mating surface of the two, and the ball bearing is carefully inserted into the mating position. Care should be taken when handling: Epoxy resin must not be allowed to flow into the balls and raceways; the axis of the bond should be placed in a vertical plane to obtain high concentricity.
The shaft fittings repaired by the above method have not been found to have loosening after more than one year of operation.
3 Repair of Notches Repairing the severe wear of two shaft holes is a scrap steel cutter. The procedure is as follows.
1) Place the body of the shearing machine on the slide of the lathe, correct the parallelism of the three shaft holes, and increase the worn hole by about 8mm.
2) The car has a steel sleeve whose outer diameter is matched with the large diameter of the hole and the inner diameter is matched with the standard copper sleeve outer diameter. The standard copper is set into the long steel sleeve and the steel sleeve is set into the bore hole.
3) Wash the steel sleeve with the acetone and the hole where the shaft hole of the machine body has not been removed, and dry it and pour the formulated epoxy resin. After being dried, the shaft hole is machined and put into use.
In short, there are many examples, all kinds of adhesive repair examples have successfully shown that the epoxy resin has broad development prospects in the maintenance of construction machinery, and the economic benefits it brings can not but be convinced and amazing!
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