JP2001165146A - Composite wear resistant member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve problems such as dispersion in the grain size of a product and a lowering of crushing efficiency heretofore unavoidable due to uneven wear from the functional point of view of a device, even in a composite wear resistant material formed of two materials. SOLUTION: A wear curve M in a worn surface when the wear resistant member formed of only the material A forming a base material 1 reaches the limit of service, is empirically grasped, and the filling rate of a filler 2 which is a higher wear resistant material, is set every worn surface divided according to the wear resistance ratio of the material B to the material A. The worn surface in service thereby recedes uniformly over the whole surface while forming a nearly straight wear line H, thus solving the problems.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in the function of a crushing and crushing apparatus incorporating a wear-resistant member.

[0002]

2. Description of the Related Art Wear-resistant members are used in a wide range of industrial fields,
It is used for equipment, but mainly in the fields of crushers and crushers, etc., there is a work system that replaces only the parts that have been directly hit by the abrasion action and maintains the function as the equipment, mainly the crushing efficiency above a certain level. It has become idiomatic. Needless to say, during this replacement work, the entire device must be stopped, so the smaller the replacement pitch, the higher the operating rate as the device,
This is a favorable factor for production costs. Therefore, improving the wear resistance of wear-resistant members is an important requirement for increasing production costs.
A number of conventional techniques have been developed and implemented for that purpose.

[0003] The method directly related to the improvement of wear resistance is a method of replacing the material of the member itself with a material having higher hardness and higher wear resistance. For example, it is a typical example to replace 12% high manganese cast steel with 27% high chromium cast iron. It is. However, among the crushers, those with high impact force break because of high brittleness.
Due to the high risk of falling off, the application of high wear resistant materials is limited. For this reason, the concept of a composite material in which the base material is formed of a material having relatively high toughness and only the wear surface is partially replaced with a material having high wear resistance has been developed, and has led to the development of many products.

[0004] In the prior art of Japanese Utility Model Application Laid-Open No. 55-65148, a composite material jaw in which a blade member made of a hard material having high hardness and a tough reinforcing material is fitted in a tapered manner and integrally bonded. Shows tooth plate for crusher.
In No. 4824, as shown in FIG.
A configuration for preventing the fitting material from falling off due to the disengagement of the joining material is presented. The prior art showing the improvement for preventing the detachment of the composite material is disclosed in JP-A-60-84153, JP-A-55-147832, JP-A-53-35751, and JP-A-48-10126. No. 53-88875.

The tooth plate shown in FIG. 9 is a member having a jaw crusher which crushes and crushes an object to be crushed by an oscillating motion, but is rather an exceptional type of a crusher. There are overwhelming methods of crushing by sandwiching the crushed material between rotating crushing surfaces, and there are a wide variety of methods such as double roll crusher, Raymond mill, vertical mill, cone crusher. Since these wear-resistant members are circular in cross section and have a rotating wear surface, with the same idea as the tooth plate,
Japanese Patent Application Laid-Open No. 11-90 describes a prior art in which a higher-grade material is fitted evenly over the wear surface to improve the wear resistance as a whole.
No. 251. For example, the roll of the double roll crusher shown in FIG. 10 and the mantle door of the cone crusher shown in FIG. 11 are good examples.

[0006]

[0009] As shown in FIG. 9, when the mating members are uniformly arranged on the entire surface of the tooth plate to form a composite, it is possible to improve the wear resistance as a whole. Compared to the amount of wear in the central part, due to the mechanism of the equipment, the local strength of the wear action itself is unavoidable, so the occurrence of uneven wear can not be overcome yet, seriously affecting the quality and production efficiency of crushed products. The task of exerting it remains.

Japanese Patent Application Laid-Open No. 7-323238 discloses a tooth plate for solving this problem.
As shown in the figure, the block material to be fitted to the plate body 202 is separated into 201A near the center and 201B above and below, and the material is differentiated so that 201B has a higher hardness than the block material 201A. It was done. Upwards,
Since the lower abrasion resistance has been improved compared to the center, the progress of wear as a whole is equalized, and the gist is to use it upside down while preventing the initial angle of engagement between the tooth plates from changing rapidly. .

[0008] However, a rotary type device mainly comprising a crusher and a crusher is based on the principle of biting a crushed object into a long rotating space in the axial direction, and is therefore represented by a roll of a double roll crusher in FIG. The wear surface, which is initially straight, undergoes severe wear toward the center and retreats along a unique wear curve M as shown.
This is because even if the whole is made of the same material or the composite material reinforced with a high wear-resistant material as shown in FIG. Nevertheless, there remains a similar problem in that the quality of the crushed product is impaired due to uneven uneven wear and the work efficiency is continuously reduced.

Even if the idea of FIG. 12 is applied to the case of FIG. 10, it is practically difficult to prepare many kinds of fitting materials having different hardnesses so as to follow this gentle wear curve M. Work management for selecting and fitting an appropriate wear-resistant material without fail for each position is extremely troublesome. Also, in the long axis direction during use, there is a high possibility that a sharp step will occur for each mating material with different hardness, and the aim of evenly retreating as a whole is actually a heavy burden in manufacturing and work. I have to point out that it is too long.

In order to solve the above-mentioned problems, the present invention provides a wear-resistant member for crushing and crushing an object to be crushed on a rotating wear surface. It is an object of the present invention to provide a composite wear-resistant member that maintains uniform quality and uniform crushing efficiency of crushed products during the entire period from the initial installation to the final replacement.

[0011]

SUMMARY OF THE INVENTION A composite wear-resistant member according to the present invention experiences a wear curve M of a wear surface opposed to each other on the front surface with rotation of a wear-resistant member made of only material A reaching a service limit. And the filling rate of the filler 2 is set for each of the abrasion surfaces divided according to the abrasion resistance ratio of the material B / the material A. The above problem has been solved as a configuration in which the entire surface retreats evenly.

More specifically, (1) the wear resistance ratio of the material B to the material A is R (times). (2) the wear amount at each point on the wear curve M of the wear-resistant member made of only the material A M ₁ , M ₂ ,... Mn (unit: mm) (3) The wear amount at each point on the wear straight line H is represented by H ₁ , H ₂ ,.
(Unit: mm) (4) The target filling rate at each point on the wear straight line H is represented by V ₁ ,
When V ₂ ,..., Vn, it is a desirable mode to set the target filling rate Vn in accordance with the wear amount Mn such that Hn = Mn / 1−Vn (1-R) = Hmax is always constant. .

Since the present invention has the above construction, the material A
Since the filler 2 was filled by adjusting the filling rate of the material B set based on the wear curve M drawn by the wear-resistant member made of
The amount of wear at each point on the wear surface is the same for all the lines, and during use, the surface uniformly retreats while forming a horizontal wear straight line H. In other words, unless the adjustment to reduce the distance between the axes as much as the amount of wear is neglected, the biting space between the wear surface and the wear surface is always constant with a band-shaped gap defined by a single horizontal straight line at the top and bottom, and uniform crushing The product of the particle size and the granular shape is continuously manufactured with almost the same grinding efficiency.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment in which the present invention is applied to the double roll crusher shown in FIG. 3, and is a front development view of a wear surface having a cylindrical outer peripheral surface. Base material 1,
It goes without saying that the material of the filler 2 can be selected from known materials, and the shape of the filler 2 can be freely changed. The measurement positions 1 to 20 in the figure represent the center line of the wear surface divided at right angles to the axial direction in order to calculate the filling rate of the filler 2 with respect to the base material 1;
Although it is equally divided, it goes without saying that this division can be freely changed.

It is reasonable to start the first step of the procedure with the setting of the closest packing ratio Vmax of the filler 2 to the base material 1. 2 (A) and 2 (B) are a vertical sectional view and a side view of the closest packed portion (center) of the wear surface divided into strips with respect to the center line of the wear surface divided as described above.
The allowable closest packing ratio Vmax is calculated in consideration of the toughness and strength of the base material 1 made of the material A, the size of the filler 2, the impact force of the device applied to the wear surface, the form of wear, and the like.

The wear resistance ratio of the filler 2 to the base material 1 made of the material A is set to R times, and the material A alone in the closest packed portion (the portion where the wear action is most severe, in FIG. 3, the central measuring position 10) is used. Let the maximum wear amount of the material A be Mmax and the maximum wear resistance ratio after compounding of the present invention on this wear surface be Zmax, Zmax is greatly improved as compared with the wear ratio of the material A alone (index: 1), = R · Vmax + 1 × (1−Vmax), the maximum wear Hmax after the compounding is greatly reduced to the maximum wear Mmax of the material A alone to Hmax = Mmax / 1−Vmax (1−R). I do.

The feature of the present invention is that, as shown in FIG. 4, the amounts of wear (H ₁ , H ₂ ,.
.. Hmax) is equal to Hmax of the maximum wear amount after compounding to form a horizontal wear straight line H which maintains the same value, so that Hn = Mn / 1−Vn (1-R) = Hmax (n = 1, 2, 3...)), The target filling rate Vn corresponding to the wear amount Mn.
Is a requirement.

12% high manganese in the base material 1 made of the material A
Cast steel, 27% high chromium cast iron as filler 2 made of material B
About the combination of cylindrical system (φ = 10A)
To illustrate by physical figures, the embodiment of FIG.
The rate Vmax is calculated to be 0.59, which is the basis of the calculation.
Resistance of 27% high chromium cast iron to 12% high manganese cast steel
Since the wear ratio is about three times,
The maximum wear resistance ratio Zmax after the combination is as follows: Zmax = 3 × 0.5
9 + 1 × (1−0.59) = 2.18
12% high manganese cast steel alone at central measurement position 10
Is 60 mm as shown in Table 1
Amount of wear M at position₁, M_Two…… also from Table 1
Can also. This M₁Empirically grasps the value of Mmax
This is the measured value of worn or worn products after use.
You. The maximum wear amount Mmax at the center is Hmax = 60/2.
18 = 27.5 (mm), and this value
M at each position so as not to change in the axial direction ₁,
M_Two,..., The target filling rate V₁, V_Two, ……
Set. Table 2 summarizes this procedure.
From the past operation results of this double roll crusher
Specific arrangement corresponding to the given wear curve M (filling rate
Adjustment). The composition of this composite is the material of the crushed material,
Optimum specification for on-site operating conditions such as hardness and crushing pressure of equipment
It becomes an array. As described above, to obtain the optimal specific sequence
Target wear rate Vn to wear resistance ratio R, target wear resistance after compounding
Filling with the value calculated from the ratio Zn and the area of the wear surface divided
Used in the example calculated by dividing the total area of the filler to be used
Filling rate Va for filling material shape (φ = 10 A)
The relationship between the number of fillers N is calculated in advance as shown in Table 3.
The number of fillers to fill each of the divided wear surfaces
You can decide on a seat. A random number table like Table 3
For the possible embodiment, splitting and filling of the wear surface
If you keep it as a manual due to the shape of the material,
Mass-produced filler material in advance, and
This is an advantage of reducing costs and increasing work efficiency. In addition,
As a result of adding the filling rate Va and the number N of the fillers to Table 2,
However, this compares the target filling rate Vn with the filling rate Va.
Easy to determine the number of fillers
That's because.

[0019]

[Table 1]

[0020]

[Table 2]

[0021]

[Table 3]

The base material 1 made of the material A constituting the composite material,
The combination of the fillers 2 made of the material B is free, and is determined according to the material, hardness, and crushing pressure of the material to be crushed. However, when selecting the material of the base material and the filler, a cast or forged product, for example, a plain cast steel, gray cast iron, low alloy steel, high manganese steel, high chromium cast iron, high alloy steel, etc. are selected. . In addition, as the filler 2, K
M alloys, ceramics, carbide tips, and the like can also be used. However, when the base material 1 and the filler 2 are combined from the above-described materials, the wear resistance basically has a filler>
It is necessary to use a combination that serves as a base material.

FIGS. 5A and 5B show another embodiment of the present invention, in which the present invention is applied to a mantle door whose wear surface is formed by a frustoconical outer peripheral surface. The mantle door is rotated in a reverse truncated cone-shaped cone cave to crush the object while sandwiching the crushed object between the inner circumference of the cone cave and the outer circumference of the mantle door, and as shown in FIG. The maximum wear portion is not the central measurement position 10 on the outer wear surface 3 which is inclined with respect to the axial direction of the truncated cone,
Appearing below the lower measuring position 15 and forming a biased wear curve M. Matrix alone wear amount M ₁₅ in this position determines the closest packing ratio Vmax, each target filling ratio V ₁ at each section, V _2, the procedure for determining the ...... it is similar. However, if the frusto-conical wear surface is developed as shown in FIG. 6 (B), it becomes a fan shape, and the shape and dimensions of each divided cross section are different from each other. The number needs to be calculated by multiplying by a geometric coefficient.
Although the shape of the filler 2 is hexagonal as shown in the figure, it goes without saying that this means that the shape of the filler 2 is not restricted.

FIGS. 7A and 7B show still another embodiment, in which the present invention is applied to a rotary table of a vertical mill. Since the rotary table crushes the crushed object by the rotatable rotary roller 4 provided on the rotary table made of the base material 1 as shown in FIG. A wear curve M as a wear portion is formed. For this reason, the wear surface is divided concentrically with respect to the axial direction and the closest packing ratio Vma
x, since the target filling rate Vn is determined, the shape and dimensions of each of the divided cross sections are individually different, so that the number of fillers actually arranged with respect to the target filling rate is the same as in the case of the mantle core. It is necessary to calculate by multiplying by a dynamic coefficient. The same applies to a table liner in which the table surface is not formed in a single circle, but is formed in a circular shape by combining several arc-shaped members divided radially. In addition, since the rotating roller 4 that is not driven in the mechanism has a relative rotating action with the table or the table liner of the vertical mill that rotates on the lower surface, the worn surface is divided and the densest roller is formed. If the filling rate Vmax and the target filling rate Vn are determined and multiplied by a geometric coefficient, they can be handled.

FIGS. 8A, 8B and 8C show other filling patterns of the filler. FIG. 8 (A) shows an embodiment in which the filler of the same diameter, was narrower than the pitch P _'Y interval other is one of the pitch P _Y. FIG. 8B shows an embodiment in which the pitches P _X and P _Y in both directions of the filler having the same diameter are made narrower than the other pitches P ′ _X and P ′ _Y. FIG.
(C) shows an embodiment in which the diameter of the filler is changed. Also,
A combination pattern of (A) and (C) shown in FIG.
Or a combination of (B) and (C)
(A), (B), and (C) staggered filling patterns, etc., are also conceivable. Although the arrangement of the filler is regular in the drawing, the filling rate of the filler, which is the point of the present invention, is the target filling rate finally shown in Table 2 because of the area ratio to the wear surface of the base material. There is no need to stick to the array because it will be. As a result, it is important to set the filling rate so that the wear amount is uniform at all positions on the wear surface. In addition, although the cross-sectional shape of the filler is circular, it is needless to say that it is not necessary to stick to the shape as long as it finally reaches the target filling rate shown in Table 2.

In this embodiment, a double-roll crusher, a cone crusher mantle door and a rotary table or table liner of a vertical mill and a rotary roller have been described as examples. Applicable. For example, the present invention can be applied to a rotating roller that is not driven in terms of the mechanism of a centrifugal weight mill (Raymond mill). It goes without saying that the shape of the filler to be filled in the base material may be an asymmetrical shape such as a rectangular shape and a gourd shape in addition to the columnar shape, the hexagonal shape, and the square shape as described in the embodiment.

[0027]

As described above, according to the present invention, the wear surface of the wear-resistant member specified for each member of each device is formed by arranging a filler material for enhancing the wear resistance in accordance with a specific wear curve. ,
After the abrasion-resistant member is attached, a stable quality can be obtained consistently with no change in the grain shape and particle size of the crushed product until the last moment of abrasion disposal. The crushing efficiency is always kept constant,
The synergistic effect of workability improvement and quality stability will enhance the efficiency of on-site work to the maximum.

If the manufacturing process is too complicated, the composite wear-resistant member may fail due to disadvantageous productivity exceeding its effect. In the case of the present invention, however, the material A constituting the base material has Since the closest packing ratio that can hold the filler soundly is specified from the strength and toughness of the material, and the wear curve M drawn by the material A is almost specified for each device, operating condition, and crushed material. Standardization becomes easy, and the advantages of reducing the cost and increasing the work efficiency by mass-producing the filler as a single item in advance cannot be overlooked, and these are extremely valuable as effects superior to the prior art.

[Brief description of the drawings]

FIG. 1 is a front development view of a wear surface having a cylindrical outer peripheral surface according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view (A) and a side view developed view (B) of a close-packed portion of the same embodiment.

FIG. 3 is a front sectional view showing a wear curve M;

FIG. 4 is a front sectional view showing a wear straight line H;

FIG. 5A is a plan view showing another embodiment of the present invention, and FIG.
It is an arrow view (B) of the -X cross section.

6 is a partial front sectional view (A) and a partial developed view (B) showing a wear curve M in FIG. 5;

FIG. 7A is a plan view showing another embodiment, and FIG.
It is an arrow view (B) of an X cross section.

FIG. 8 is front views (A), (B), and (C) showing an arrangement pattern of another filler according to the present invention.

FIG. 9 is a sectional perspective view of a conventional technique.

FIG. 10 is a perspective view of another prior art.

FIG. 11 is a perspective view of still another conventional technique.

FIG. 12 is a perspective view (A) and a sectional view (B) of still another conventional technique.

[Explanation of symbols]

1 Base material 2 Filler Mn Wear amount at each measurement position of wear curve M (unit:
mm) R Wear resistance ratio of material B / material A (times) Vn Target filling rate at each measurement position cross section Hn Wear amount at each measurement position of wear straight line H (unit:
mm)

Claims (6)

[Claims] 1. A composite wear-resistant member in which a wear surface of a base material 1 made of a material A is filled with a filler 2 made of another material B having higher wear resistance than the material A to enhance wear resistance. The wear curve made of only the material A alone is reached according to the wear resistance M of the material B / material A according to the wear resistance ratio of the material B / material A by empirically grasping the wear curve M of the wear surfaces facing each other with the rotation reaching the service limit. A composite wear-resistant member, wherein the filling rate of the filler 2 is set for each of the worn surfaces, and the worn surface in use retreats uniformly over the entire surface while forming a substantially wear straight line H. 2. The wear resistance ratio of the material B to the material A is R (times). 2. The wear amount at each point on the wear curve M of the wear-resistant member made of the material A alone is M. ₁ , M ₂ ,... Mn (unit: mm) (3) The wear amount at each point on the wear straight line H is represented by H ₁ , H ₂ ,.
(Unit: mm) (4) The target filling rate at each point on the wear straight line H is represented by V ₁ ,
Composite V _2, characterized by setting the Hn = Mn / 1-Vn ( 1-R) = Hmax is always corresponding to the wear amount Mn to be constant target filling rate Vn when the ...... Vn Wear-resistant member. 3. The composite wear-resistant member according to claim 1, wherein the composite wear-resistant member is a pair of rolls of a double roll crusher. 4. The composite wear-resistant member according to claim 1, wherein the composite wear-resistant member is a cone crusher mantle door. 5. The composite wear-resistant member according to claim 1, wherein the composite wear-resistant member is a rotary table or a table liner of a vertical mill and a rotary roller. 6. The composite wear-resistant member according to claim 1, wherein the composite wear-resistant member is a rotating roller of a Raymond mill.