JPH0115445B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (A) [Field of Industrial Application] The present invention relates to a belt cleaner for scraping off deposits on a belt conveyor for conveying coke and the like.

(B) [Prior Art] Conventionally, in belt conveyors used in coke ovens, deposits that adhere to the belt during use have been scraped off with a cleaner made of special steel.

However, even with special steel, there were inconveniences such as high price, corrosion, etc., which led to severe wear, requiring frequent replacement, resulting in conveyors being suspended during that time, reducing work efficiency, and requiring manpower for maintenance. .

Additionally, ceramics can be bonded to a mating substrate with an adhesive such as resin for wear resistance, but due to frictional heat during use, heat cycles due to changes in the temperature of the transported object, natural deterioration of the adhesive, etc. However, there were disadvantages such as the adhesive part peeling off during use, and the service life was short.

Furthermore, there is a method of pre-metallizing ceramics and bonding it to a metal substrate, but metallization of ceramics is usually carried out at high temperatures of 1000℃ or higher, such as by the molybdenum manganese method, and after metallization, the metal substrate is further bonded with silver brazing, etc. Since the bonding process is carried out in a high-temperature furnace, the work is complicated and requires a large number of steps, such as processing in a high-temperature furnace and heat treatment twice.

(C) [Problems to be Solved by the Invention] The present invention is a method for producing a belt cleaner that solves these disadvantages, can be produced through extremely simple steps, and has excellent wear resistance.

(D) [Means for solving the problem] As shown in Figs. 1 and 2, the metallized surface 6 of the ceramic plate 3 is metalized by ultrasonic vibration excitation in the molten alloy 1 with a low melting point. , in its molten state, the metal substrate 4 is preheated to near the melting point of the molten alloy.
This is a method of manufacturing a composite belt cleaner by integrally joining the cleaner part 5 of the belt cleaner.

That is, as shown in FIG.
An ultrasonic transducer 2 is inserted into the ultrasonic transducer 2, and a ceramic plate 3 made of, for example, alumina is attached to the ultrasonic transducer 2.
When the bonded surface of the ceramic plate 3 is immersed in the molten metal 1 and brought into contact with it, and ultrasonic vibrations of, for example, 1KW and 18KHz are applied to the ultrasonic vibrator 2, the contact surface of the ceramic plate 3 with the molten metal 1 is cavitated. The liquid phase-solid phase interfacial reaction is promoted and metallization is strongly achieved.

In addition, as the molten alloy, in addition to Zn alloy and Pb alloy, alloys such as silver solder can be selected and used with a melting point required for use.

Next, a metal substrate 4 having mounting holes 7 as shown in FIGS. 2, 3, and 5 is preheated to near the melting point of the molten alloy 1, and the above-described ceramic plate 3 is placed in the cleaner section 5. The metallized surface 6 of is placed in its molten state and joined at once.

In this case, if necessary, flux is also used on the bonding surfaces to facilitate bonding.

Note that if the metal substrate 4 is plated in advance by hot-dip galvanizing or the like, not only will the metal substrate 4 be rust-proofed, but also bonding to the metallized surface 6 of the ceramic plate 3 will be facilitated.

Further, FIG. 2 shows the case where the ceramic plate 3 is bonded to the flat metal substrate 4, and FIG. 3 shows the case where the bonded portion of the ceramic plate 3 of the metal substrate 4 is cut to make it flush. In either case, the bonding strength does not decrease. However, since the cutting portion in FIG. 3 can be made thinner, the scraping effect is better than in the case in FIG. 2.

(E) [Operations and effects of the invention] In order to use the belt cleaner of the present invention, the fourth
As shown in the figure, this belt cleaner may be used by being bolted to the belt cleaner section of a belt conveyor through the attachment hole 7 of the present belt cleaner.

As shown in FIG. 4, in the belt cleaner of the present invention, deposits adhering to the belt of the belt conveyor are scraped off by the ceramic 3. If wear ceramics are used by metallization bonding to the metal substrate 4, it can be used more economically and stably for a long period of time than using cemented carbide metal or the like.

Furthermore, as mentioned above, the belt cleaner of the present invention performs ultrasonic metallization on the ceramics 3, so there is no need for high-temperature treatment of several hundred degrees Celsius as in the conventional molybdenum-manganese method, and Zn alloy metallization is not required. Metals with relatively low melting points such as metals, Pb alloys, or silver solder are used, and metallization can be performed by excitation of ultrasonic vibrations, so the work process is extremely simple and does not require a gas atmosphere or vacuum atmosphere. The work is easy and the equipment is economical.

Actual usage results also show, for example, in the case of the belt cleaner shown in Figs. 2 and 3, which is ultrasonically metallized and bonded to a hot-dip galvanized metal substrate 4 using a Zn alloy.
The Zn alloy itself has strong mechanical bonding strength, and the metallized bonding is also an inorganic bonding, and the ceramic plate 3 is fully bonded to the metal substrate 4 to form a composite structure, so there is no damage caused by impact during operation, etc. The bond is extremely strong, with no deterioration of the adhesive over time, deterioration or peeling due to operating temperatures, or loss of parts, unlike when bonding with organic adhesives.
As shown in FIG. 4, when used in the scraping section of a belt conveyor, the ceramic plate 3 could be used without peeling or chipping until it was completely worn out.

As described above, the belt cleaner of the present invention metalizes the ceramic plate 3 and joins it to the metal substrate 4 all at once, which simplifies the work process, allows for strong inorganic bonding, and allows for relatively low temperature. Wear-resistant materials often used in the field include:
It has excellent features in terms of functionality, economy, and ease of manufacture.

(F) [Other Embodiments] The composite portion of the belt cleaner of the present invention, consisting of the metal substrate 4 and the ceramic plate 3, can be applied as a wear-resistant member to worn parts of equipment that are subject to severe wear.

As described above, the present invention is a belt cleaner that uses ultrasonic vibration of a low-melting alloy such as a Zn alloy or a Pb alloy to metallize bonding of a ceramic and a metal substrate. There is no need to use it, the manufacturing equipment is simple and inexpensive, and it is easy to manufacture.

Moreover, since the metallization of the ceramic and the bonding to the metal substrate can be performed by metallization using a single ultrasonic vibration, the manufacturing cost is low and economical.

Furthermore, since the metallization bonding of ceramics is performed at a relatively low temperature, residual stress in the ceramics is small, and there is no risk of peeling, cracking, or cracking of the ceramics during use.
This is a method for manufacturing a belt cleaner that has many excellent features such as no chipping and good durability over long periods of use.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of metallization bonding of the belt cleaner of the present invention. 2 and 3 are explanatory side views of the belt cleaner of the present invention. FIG. 4 is an explanatory diagram of the state in which the belt cleaner of the present invention is used. FIG. 5 is an explanatory perspective view of the belt cleaner of the present invention. 1 is a molten alloy, 2 is an ultrasonic vibrator, 3 is a ceramic plate, 4 is a metal substrate, 5 is a cleaner part, 6 is a metallized surface, and 7 is a mounting hole.

Claims (1)

[Scope of Claims] 1. A cleaner section of a metal substrate in which the metallized surface of a ceramic plate is metalized by ultrasonic vibration excitation in a molten alloy with a low melting point, and is preheated to near the melting point of the molten alloy in its molten state. A method for producing a belt cleaner characterized by integrally joining the belt cleaner to create a composite belt cleaner.