Roller structure of a roller press embedded with cemented carbide studs

Abstract

The invention discloses a roller structure of a rolling machine inlaid with cemented carbide studs, which comprises a main shaft, a roller cover structure and a roll surface structure. structure, which includes a number of roller cover base modules uniformly arranged along the circumference of the main shaft; A plurality of roller surface modules, each of which is evenly inlaid with a plurality of cemented carbide studs. The invention improves the efficiency of on-site maintenance and replacement of worn parts of the roller press, avoids labor, time and economic losses, and reduces the user's use cost. At the same time, the arrangement of the hard alloy studs on the roller surface structure can improve the occlusal effect of materials , reduce the sliding displacement of the material during the roller surface extrusion process, and improve the efficiency of high-pressure crushing. In addition, the invention can also conveniently recycle and separate the base material of the roller sleeve and the cemented carbide stud to reduce pollution.

Description

technical field [0001] The invention belongs to the technical field of crushing equipment, and particularly relates to a roller structure of a roller press inlaid with hard alloy studs. Background technique [0002] The roller of the roller press is the core part of the roller press, which directly contacts and crushes the material by high pressure. The nailed roller has a long service life and a better crushing effect, but there are still the following problems in the application process of this type of roller: [0003] 1. Roller sleeve structure problem. At present, the roller sleeves of the roller presses are in the shape of a ring, which is assembled with the roller shaft by means of interference fit. After the surface of the roller sleeve is worn, the roller sleeve and the roller shaft can be disassembled by heating, and the roller sleeve can be replaced separately. . Then, special equipment is required for heating and dismantling. Generally, only professional manufa...

AI Technical Summary

Problems solved by technology

Then heating and disassembly requires special equipment. Generally, only professional manufacturers have the conditions to disassemble and replace the roller sleeves, and the production and operation site does not have the conditions to replace the roller sleeves.

[0004] 2. Roller surface structure problem

At present, the roller surface inlaid with cemented carbide studs has a longer service life, but the manufacturing process is complicated, the material cost is also the highest, and the maintenance is difficult. Breaking and falling off due to load impact, causing abnormal damage to the roller surface and reducing the overall life of the roller surface

[0005] If there is local damage, cemented carbide studs fall off, etc., the wear resistance of the roll surface will be greatly reduced, and it will not be possible to form a pad between the cemented carbide studs, and the base material of the roll sleeve can only be directly worn (generally The hardness of the base metal of the roll surface is HRC40-50, and the hardness of the studs is greater than HRA85. The wear resistance of the base material of the roll surface is far inferior to that of the studs. Passive falling off, the pit will expand, and continuous spreading will cause the effect of the roller press to squeeze the material to be greatly reduced, and the output of the equipment will drop sharply), and if this happens, it will not be possible to completely repair it to the best state at the work site. The service life is greatly reduced, and due to inconsistent wear, other intact parts will wear slowly, and the damaged part will wear extremely fast. Once the roller surface wears unevenly, the entire roller will form an irregular shape, which is no longer a A complete circle will cause a decrease in output and unstable operation, so it needs to be scrapped and replaced, which will cause part of the damage and affect the life of the entire roller

[0006] In addition, most of the stud roller surfaces currently use a uniform diameter and length of the studs. In this way, when the two rollers of the roller press rotate relative to each other for extrusion and crushing, some of the material will be crushed due to excessive pressure. Sliding occurs during extrusion and cannot be crushed by two rollers. This part of the sliding material will reduce the efficiency of roller extrusion and crushing. At the same time, sliding will generate a lot of heat, which will have a negative impact on the mechanical structure.

At the same time, because the arrangement position of the cemented carbide studs is relatively simple, and the distance between adjacent cemented carbide studs is the same, a certain degree of concentrated force will be generated on the force of the base material of the roller sleeve, forming a rapid deformation of the metal material. Fatigue, decline in mechanical properties, cracking and delamination of the roll surface, etc., resulting in abnormal shedding of studs, thus affecting the life of the roll surface

[0007] 3. Disposal of waste roller sleeves

At present, the widely used roller sleeves of roller presses cannot be used once the roller surface is seriously damaged, and the roller sleeves must be disassembled and replaced. The replaced old roller sleeves cannot be treated as scrap steel because the roller surface still contains some cemented carbide materials. , the cemented carbide material must also be removed

The current practice is to use artificial carbon arc gouging to remove the residual tungsten carbide studs from the studs embedded on the surface of the roll sleeve by heating and melting the base material of the roll sleeve. The carbon arc gouging process will generate relatively large smoke pollution. It is necessary to use more carbon rod consumables. After all the studs on the roller surface are processed, the base material of the roller sleeve can be recycled as scrap steel. The waste roller sleeves inlaid with studs are more difficult to deal with, and the recycling cost is higher. Easy to recycle Poor sex

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