JPS59212160A - Wear-resistant member for pulverizer - Google Patents

Abstract

PURPOSE:To provide a wear-resistant member for a pulverizer having remarkably improved resistance to failure and separation by incorporating a high toughness reinforcing material consisting of an expanded metal, welded wire screen, etc. into the wear-resistant member. CONSTITUTION:Casting molds 1 and 2 which have a sprue 3, a gate 4, a runner 8 and a riser 9 meeting prescribed shapes and sizes and are bisected at a parting line 10 are formed in the case of casting a composite table knife. The mold 1 is removed, upon completion of molding, and the mold 2 is placed to face upward the parting line 10 side thereof. An expanded metal 5 having a mild steel body 7 after completion of coating a mold coating material is pushed into the mold 2 and is set in a molding space 6. The metal 5 is set in the prescribed position further from the wearing surface for grinding of the table knife. The table knife is then formed by casting, allowing to cool and shaking out and only the excess length part of the table knife projected with the mild steel bar 7 is carefully gas-cut. The gate 4 and the riser 9 are removed by breaking and thereafter the traces after breakage and others are smoothed by grinding and finally the table knife is subjected to a heat treatment, by which the final product is obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wear-resistant member for, for example, a liner or roller tq for a crusher.

Conventionally, wear-resistant members such as liners, battens, mantles, etc. have been used in various mills and crushers for crushing coal, ores, and chemical substances.

Conventionally, the materials for liners, etc., which are wear-resistant members, are as follows:
In addition to high manganese cast steel, high f-com cast iron, medium chrome lX cast iron, and alloy cast steel are used. However, in terms of wear resistance, high chromium cast iron or medium chromium cast iron is generally superior in many cases. However, this material has poor toughness, so if it is subjected to severe impact, it may cause cracks to emit light.
) When the crusher was rolling offshore (911), it was quite difficult to find the 11.L linen in this state. etc., and in the worst case (J is the material to be crushed, J is directly crushed by IY)
Worn out or broken +1. L/: Nirai Jk: I'm afraid there will be a secondary disaster in which the crusher itself gets damaged.

However, if such a high wear-resistant material breaks (1), it is possible to minimize the degree of cap damage (% J3, 'You will need something that can be used continuously.

A3, conventionally, live's resistance 1111 wear 1i 1 and toughness 1
As a composite material that can satisfy (1) first (,L, high, 7
High chromium cast iron to high chromium cast iron to 1 steel
The method of inserting steel into the same H and 7 to make a two-layer material is not the older brother, or the previous type 11 has different material embedding technology and h
There are many problems with life's R:A, and there are problems with peeling during use under harsh operating conditions of 1,000°C. In the case of tooth root (J, shi) - kushinshi 1, etc., the high manganese cast steel parts of the four parts were worn abnormally compared to the high chromium cast iron part of the convex part 'j'< 19, and as a result In some cases, there are cases where the material to be crushed is discharged without being thoroughly crushed as a whole.In the latter method, production = 1 Moreover, the cross-sectional area occupied by the carbon cast steel in the liner as a whole is quite small, which poses a problem in terms of service life.

The present invention aims to eliminate these drawbacks by incorporating reinforcing materials such as expanded metal or welded wire mesh into the wear-resistant member for a crusher! ,: something.

Hereinafter, the present invention will be described in detail based on casting drawings of a table liner for a Roche mill which is a vertical type [1-ramil].

As shown in Figure 1.2, the composite double lie 2 is first cast according to the predetermined shape and dimensions.
Exit 3.1 old 4, runner 8, riser 9, parting line 10
Mold molds 1 and 2, which are divided into two parts.

Construction-11, 1 completed 1 cunning, easy! Remove X121 and mold 2
Place the mold 2 with the parting line 10 side facing up.

On the other hand, depending on the shape and dimensions of the I-f liner, the expanded metal 5 and the welded wire mesh as reinforcing materials to be built into the wear-resistant member are cut so that they are slightly smaller than the outer edge of the j-Fluray J. Ru.

Exband Metal 5-Year Welding Metal wI (It is a commercially available mild steel material that has already been made in a lattice pattern with a relatively high density of F8r meshes (each with a small cross-sectional area. .

For example, if the thickness of the table liner is 80111 m, the expanded metal 5 and C have a cross section of 4, 5 x 7, Q+ntn/, r, which is relatively small. .

Several mild steel rods 7 are attached to the expanded metal 5 at desired locations S, '2Ii!, as shown in FIG. i angle (
After welding them together and cleaning them, apply m1 rivet' pattern up to i4.

The purpose of this mold application is to prevent the molten metal and the expanded metal from fusing and turning into solids when the molten metal is cast with the expanded metal 5) installed in the mold. 1.11. -!
It's for the sake of J.

In the example described in J3.11, the mild steel rod 7 was welded and integrated with the kiss band metal 5, but instead of the mild steel rod 7, 11
This is done by making one cut in a part of the spand metal 5 and bending that part by 171 degrees.

Il: j%! The expanded metal 5 obtained by removing the mild steel rod 7 which has been coated with 1j is embedded in the cast Jl\2 and set in the mold space 6. Of course, conversely, the lieboard 7 is embedded in the mold 1 (it is not possible to do so).
Partially large 31 I-j varnish band metal 5 without using
It is possible to insert the pieces cut into 1 pieces into 1Φ wood 11 previously set in a part of the mold 2 as shown in FIG. 3, and then embed them.

1' Set the position of the kiss band metal 5 in the mold space 6 (at a predetermined position 1 on the side far from the grinding wear surface of the double liner, for example, II of the table liner).
When the diameter is 8QIIllIll as noted in +14, the -1 inch large -I-kiss band metal 5 is approximately 20...3Q from the surface opposite to the grinding wear surface of the table liner.
Move the fillet 1~ until it comes to the mm position. -, cover the mold 1 and pour molten metal such as medium chromium cast iron.

In this way, the pull liner was cast, cooled, and sand was removed. The pull liner was made of a mild steel rod with 7 protruding parts.
(After removing the weir 4 and riser 9, use a grinder to smooth out the crease marks and other marks.) Afterwards, it is subjected to a prescribed heat treatment to form the final product.

d3. There is also a method of reinforcing it by casting a long bar with a mild steel rod C in the 6th part on the wear-resistant part side. In the case of /J and A, the reinforcing bars must be shaped into the specified shape by some method (bending 110 balls, cutting 71111-1 welding, etc.) according to the shape of the table liner. Moreover, the manufacturing cost 1- is also affected.

On the other hand, if commercially available "kiss band metal" or welded wire mesh is built into the 1ψ-tear-resistant member, there is almost no need for bending or any processing on the radius K<'.

As described above, a reinforcing material made of expanded metal J and bamboo welded wire mesh is built into the wear-resistant member to obtain a good i4 wear member for a crusher.

Next, as a reinforcing member, a spunt metal reliner with built-in kiss band metal was prepared in Example 1.
and l no c honsun.

Example resistance 1? Increased monthly interest rate [1mm cast iron FCW, 6 (20Cr
FC) 1111 Strength Material J MENI' Spunto Metal J I S
G 3351
．． mm - F I °ノ'1'' people 600x450x
Thickness 80m1 liner cast heavy lifting 152k.

Reinforcing material level 1r 20-23mm from the back side of the liner
As Example 2, a reinforcing reinforcing rod with built-in reinforcing bars as a reinforcing material is shown. Comparative example (an unreinforced liner without built-in reinforcing material [Example 2]) Reinforcement material Reinforcing bar (mild steel bar) Cross-sectional dimensions φ18m+n Reinforcement material position 26nv from the back of the liner Other details are the same as Example 1 [Comparative example] Non-reinforcing material linerNext, 1, Ru ζ° to the -1-kissband metal-filled rhino, reinforcing reinforcing liner, r weight of the reinforcing shrine noino.
^ The results of the following tests were conducted to investigate the occurrence of cracks and the progress Ii & condition.

In the test, each of the i-Browninos was placed on an 87+ & No. I steel surface plate measuring approximately 1000 mm square x 300 mm 117 mm, and their four corners were held down using temporary clamps (fixed and fixed as described below). Approximately 2/I Okg from the height of
A spherical steel weight is dropped into the medium heat part of the table liner, and the falling height of the weight and the number of falling Fjl are calculated. Comparison of 7
1-] The test results of 11 A are shown below, and the state of crack occurrence is shown below. 4
−・Illustrated in the photograph as Figure 6.

The height of the fall of the weight was increased by increasing the number of falls.The number of falls and the height of fall of the weight were both as shown in Table 1.

However, until the 23rd time, each liner should be placed on the surface plate! T + God to fall, 1 after the 24th time. ~
11. To fit the liner together, place the lower sides of both ends of the liner on the supporting material, and while the bottom of the liner is floating, drop the plow.
Ta.

As a result, unreinforced rhino cracks occurred, and 1a +0+ C]r knee failure and separation occurred. Please take a photo of this condition as shown in Figure 4. In the case of front reinforcement + Elaina, a crank will occur and it will crack from C (- is relatively quick, and moreover, if a crack occurs/l, the scattering is large, and 11 will open sharply at the cracked place) , in the case of a liner with IC8 reinforcing steel that is falling apart and in poor condition, a crack will appear at the 10th time, and at the 22nd time, the crack will go straight through the liner from one end to the other, and the small pieces will break (1).
1 separation. This state is photographed as FIG. 5. This spell was relatively quick to crack, but Kuntsuku was relatively close to penetrating it. As a result, there were quite a few small cracks, and there was some scattering, but the person J"l
4. Mouth [did not fall apart 3. This point 1. +H(
[Reinforcement shrine] Compared to the end, it will be used for a long time.

The reason for this is that the strength of the reinforcing bars is lower than that of the wear-resistant materials FC and W6, which are the base materials for Noino, and the reinforcing bars with a larger diameter compared to the thickness of the liner are cast, which reduces the strength of the entire liner. It has decreased! Rice and melting 4 after casting 1i8J
This is thought to be due to poor hot water circulation due to less wetness of the melon.

Also, since the coating mold was applied around the reinforcing bars, after casting, there was a space between the reinforcing bars and the base material that could be considered as a part of the notch, and the reinforcing bars were large. As a result of this space getting closer to the surface of the liner, in the case of a 1°L kiss band metal liner, which is thought to be due to the notch effect, a crack occurred at the 16th time, and a crack appeared at the 24th time. - It penetrated from the end to the end J. This state is photographed as shown in Figure 6. In this case, it is good against the occurrence of cracks and breakage and separation, and the scattering of small fragments is especially irritating to the scattering property of h<, M. Jlr4t),
- 4 Varnished metal liners are difficult to insert (, tend to be, but if the crank develops - (゛b There are no small pieces, and one line is about to break.) Therefore, if it is used for a table live as a wear-resistant member of a supply I+1.- modified that is operated continuously, there will be no practical impact (, fc1 minute). I understand.

In addition, the live-dos of the 33 scales, [41 degrees (, L) did not change much.

As a result of various experiments, -1 Kisbantonnu9ru and the type of reinforcing bars are basically I3, Figure 7 J')J, H Figure ε, with diagonal lines, <J method 1) + +lU of the IC part.
~'l'! 'U< is selected and put into practical use. I3,
In Figure 7C, the dimensions of 7191 are 3/IX 135. /
IIIITII;I, Iko(ma(96 X101.6m
The relationship between the live wall thickness (cm) and 1 (mm) of one side of the expanded metal cross section in the case of an expanded metal of m,
FIG. 8 shows the relationship between the diameter of the round bar (mm) and the diameter of the round bar (mm) in the case of reinforcing bars with a side bond of 15 to 300 m.

In the case of the reinforcing liner, the live IIlmit,ln
: The diameter of all reinforcing bars is made relatively small, and ti 1ii)
1tlA may be narrowed during
The number of man-hours for bending 1 and welding increases considerably, and the fabrication cost 1 is affected. To this, with tJ L, to Sat.
Span 1 ~ Mekuru \ゝ) (If you use F mesh and wire mesh, you can pass the commercially available 6. Cut only the outer edge according to X.
Since it can be used in many situations, it reduces machining man-hours and manufacturing time, making it more practical.

(13) In Example 1 and 1 above, when casting the reinforcing material, the coating mold was applied (1). The carbon content of 14111A quickly changes to the ratio of the reinforcing material. This is because the difference in the coefficient of linear expansion of the two +Δ^'1 during subsequent solidification increases the α phase.However, when using a coating mold (
There is a space about the thickness of the coating mold between the reinforcing material and the reinforcing material.
Become a prisoner. Therefore, if we focus on preventing the low strength caused by the 111 material and Mitsumi between 9 and 7 of the reinforcement month, it is possible to increase the φ51. −′( without using ;L
It is also possible to visit there. Do not use a coating mold (dureha,
As soon as it is cast, the reinforcing materials such as llI44 are completely integrated,
There is no space that can be considered as a cut-off. However, since the carburization during casting is Lt'l-, whether or not to use coating powder may be determined depending on the thickness, etc.

In the present invention, reinforcement Δ4 with a high toughness of 1'l made of upper band metal, welded wire mesh, etc. is added to this J, -), and the lower part 44 is made of wear-resistant cast iron or wear-resistant part 61/4. ←−
Since it is built-in, the damage resistance is Ml 11+ or Kimishikuni 1,
If this product is used as a pit wear-resistant part such as a table rhino for crushing, it will prevent damage. And, even if a part of the live part (,: tutttsu) occurs during use, it is the reinforcing material part (till t
1), the reinforcing material is densely packed vertically and horizontally, so during the operation of the crusher, 11i41 premature wear part 4A or small J °1 and /< 1 (I don't want it to float or fall off, but it has an effect that has not been seen in previous liners, etc., and as a result, Sumi's life will be greatly reduced.) Kiki C Saru.

[Brief explanation of the drawing]

Fig. 1 1Mahon 5L light copper 1 worn part shrine ``Rust ij! 7
,, A plan view showing the state in the case of Fig. 4 shows the state before failure in the conventional 7HH (1lii) r drop test, Fig. 9 ('15' true), Fig. 5, and Fig. Showing the implementation 1ri1, the drop of the sinewed liner and the expanded metal liner;
, FIG. 7 a3 and FIG. 8 are pictorial diagrams illustrating expanded metal and reinforcing bar stripping used in the present invention, respectively. 1.2 Mold, 3... Sprue, 5... Extract metal, 6... u ``r'! Space, 7... Mild steel bar, 9
...Oshiyu, 11...11] Wood special '[Applicant Ube Industries Co., Ltd. at Figure 2 293- Procedural amendment dated September 1989-2 51 Office Commissioner, 1, '14 (' + Indication Japanese Patent Application No. 58-84983 2, Name of the invention Copper 1q Wearing member 3 for crusher :': 1-12-32 Nishihonmachi, Ube City, 1 Prefecture
No. 4, Date of Amendment Order, dated August 30, 1982, ? +Ii Positive subject specification -l (Detailed description of the invention column, simple drawings, line 11 of the same page, and page 11, page 111'+, with a photograph as 1) is corrected to "ni". ( 2) Page 10 of the specification, No. 1 tj, 1.'I No. 3.
Add "12" next to "-/It" and "1-Ano Oil Robbery Ino" on the 15th line of the same page. (3) Page 10, No. 61-1, 1' of the specification;! :lI
After 1, add "13". (4) Add "14" next to "1 reinforcing bar" on page 10, line 8 of the specification. (5) No. 10, line 8 of the specification, page 91-1. In the 11th line of the same page, and next to the ``knock 1'' in the 12th t'i of the same page, add ``15''. (6) Next to "1st grade C" on page 10, line 10 of the specification, "
16” will be added. (7) Item 11 of the specification jAl ffi 81-+, c
l; , J, h, lul j:, t ffi 14 line expansion (ζ metal person Rinoi J10 then r 17
Add j. (8) Page 11, line 9 in the specification, and t'J 1st
118] is added next to "1 crack in 1 line." (5)) Page 14, line 19 of Ming Ill Zhan, and 1
Change the ``Diagram (Photograph)'' on page 5, No. 3h to ``Perspective View.'' (10) Figures 4, 5, and 6 have been supplemented as attached. that's all

Claims (1)

[Claims] Wear-resistant part set for crushers with reinforcement made of expanded metal or welded wire mesh built into the J+4 wear part.