How to repair the damaged track plate of VOGELE S1800 paver
Fault phenomenon: start with a VOGELE S1800 paver, the use of good results, but two years after the track plate appeared a large area of damage, can not meet the needs of construction. Therefore, the company has repaired the fittings of this equipment.
Maintenance process:
In order to restore the machine paving performance, we will go to the original track plate glue taken after the special process of re hanging plastic, after repeated experiments, completed the renovation of the old track board, tracked the cost of renovation are imported board 1 / 10 and 1 / 3 in domestic, the economic benefit is very obvious. Here is a brief introduction of the renovation process.
Application requirements of rubber for 1 track plates
The paver work required for adhesion is to rely on the rubber crawler board and ground friction to achieve, to rely on both sides of the crawler walking speed difference to realize, in the process of turning the track plate lateral displacement and ground friction force is very large, if the rubber strength or deformation ability is not enough trackboard will appear, serious damage such as wear and tear. When paving hot mix asphalt in summer, the increase of ambient temperature leads to the decrease of the deformation capacity of rubber, and the damage is more serious at this time.
Design goal of 2 rubber specimen
With the same effect of imported rubber track plates as the design target, the shore hardness and tensile strength are the main control indexes in the actual production process. The shore hardness of imported rubber plate is 79 degrees; the shore hardness of domestic product is 68 degree, the tensile strength is 19.7MPa, and the elongation is 310%.
The die structure is shown in figure 1. The dimension accuracy of the mating parts of the track plate and the forming die should be controlled within 5mm.
3 treatment of old track plates
The process flow is shown in figure 2.
Specific methods: according to the workpiece and the rubber surface for chemical treatment to glue, which is soaked with formic acid derusting, then grinding (conditional on grinder grinding, grinding operation) should pay attention to try to ensure the combination of surface finish and grinding quantity to be as small as possible, after treatment with not there is no rust. Then wash the workpiece with gasoline and dry it with adhesive. Because the adhesive properties of the workpiece and the rubber binding is essential, therefore after investigation and evaluation and careful investigation of the market, finally decided to open the United States and the Shanghai cooperation muruk adhesive production, bonding the adhesive for metal and rubber, with good adhesive properties. In accordance with the instructions, first use 205 primer, 35min and then coated with 202, keep 40min, and then into the vulcanizing machine internal pressure molding. Special attention should be paid to the application of adhesive in the process should ensure that the environment clean, no pollution.
Production process of 4 rubber specimen
The production process is shown in figure 3.
(1) plasticization is to increase the plasticity of natural rubber and facilitate the final molding of rubber parts.
(2) ingredients is a relatively complicated process to determine various components such as natural rubber, styrene butadiene rubber, Ding Qingjiao, accelerator and stabilizer and other more than 10 kinds of material proportion. Because various components have different functions in molding rubber parts, it is particularly important to make reasonable configuration of components in order to meet the requirements. After several experiments, the final ratio and the role of the main components were determined.
(3) mixing is to mix all kinds of materials together to prepare materials. It should be noted that the mixture must be stored at least 8h in order to feed the material in the vulcanizing mold, otherwise it will affect the performance of the rubber sheet after molding.
(4) the detection results of a performance test of rubber:
The shore hardness of the sample is 73 degree + 3 degree; the tensile strength is 20.6MPa; the elongation is 330%; it meets the requirement of use and can carry out the next step.
(5) rubber molding die before the internal uniformly coated with a layer of silicone oil to the mold, mold vulcanization temperature should be 140 ~ 160 DEG C, and should maintain at least 60min.
(6) the rubber specimens after vulcanization need to remove burrs, which mainly affect the installation quality of the excess rubber in the installation holes of the track plate.
Conclusion: after the renovation of the crawler plate of VOGELE S1800 paver, the equipment can work normally.
