JP2006007172A - Crushing face member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a crushing face member, wherein a block high in abrasion resistance and a block low in abrasion resistance are arranged by turn in the direction that the member is successively bit and a great reduction of production cost is possible. <P>SOLUTION: Horizontal ribs 12, 12 arrayed in a determined distance in a biting direction of the members arranged on the surface of a member body 10, at least a surface layer part of which consists of an easily weldable metal. The horizontal rib 12 consists of the same easily weldable metal as a base layer 21 and also has a height as low as or lower than a thickness of the base layer 21. Coated blocks 20, 20 are fixed and arrayed between adjacent horizontal ribs 12 and 12. The coated block 20 is a composite body where a metal layer 22 with abrasion resistance overlies the surface of the base layer 21 consisting of the easily weldable metal, and is fixed on the surface of the member body 10 by welding the base layer 21 of the coated block 20 and the horizontal ribs 12, 12 between which this block is put. A material 31 of lower abrasion resistance than the metal layer 22 with abrasion resistance is filled up in as high as the surface of the coated block 20 on the horizontal rib 12. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a crushing surface member used in a crusher of a type in which a material is continuously bitten between opposed crushing surfaces and pulverized. Examples of this type of pulverizer include a roll pulverizer, a cone crusher, a ring roll mill, a vertical roller mill, and an edge runner. The crushing surface member refers to a roll, a roller, a tire, a table liner, or the like that constitutes a crushing surface in such a crusher.

  Conventionally, in order to grind various materials such as iron ore, coal, coke, graphite, converter, blast furnace slag, limestone, clinker, rock, etc., various combinations of crushing surface members such as rolls, rollers, tires, table liners, etc. A crusher is used.

  In order to increase the pulverization efficiency in such a pulverizer, the present applicant alternately arranged a block having high wear resistance and a block having low wear resistance at least in the surface layer portion in the direction in which the material is bitten. The crushing surface member was developed first, and a patent was also obtained (Patent Document 1).

Japanese Patent No. 1618574

  This crushing surface member forms a rib as a block with low wear resistance on the surface of the base material by welding a plurality of flat bars to the surface of the base material at predetermined intervals in the biting direction in actual production. If necessary, a plurality of short flat bars are welded between adjacent flat bars at a predetermined interval in a direction perpendicular to the biting direction to form a rib in a square frame shape. Then, a highly wear-resistant block is formed by filling a groove-shaped recess or a bowl-shaped recess surrounded by ribs with a metal material having high wear resistance by overlay welding.

  However, when trying to form a block having high wear resistance by build-up welding, generally downward automatic arc welding is used, but in this build-up welding, the bead width is 10 to 30 mm and the bead height is only 3 to 5 mm. Absent. On the other hand, the height of the highly wear-resistant block is required to be 60 mm or more depending on the crushing surface member. Further, the size of the crushing surface member may exceed 2 m in the mill roller. An attempt to form a block with high wear resistance by overlay welding on the entire surface of such a large crushing surface member takes a great amount of time, which is a major obstacle in reducing the cost of the crushing surface member.

  As one countermeasure for solving this problem, the present applicant has proposed that the build-up welding is efficiently performed by vertical single-layer build-up welding, and a patent has also been obtained (Patent Document 2).

Japanese Patent No. 2863768

  The use of vertical single layer build-up welding reduces the welding time. However, there are many restrictions in terms of welding posture, rib shape, etc., and there are not many opportunities to fully demonstrate their abilities. In addition, in the case of a huge crushing surface member, regardless of the welding method, a large-scale construction is required, and even if the welding time is shortened, the overall construction time is not so much reduced. One example thereof will be described with respect to a grinding roller.

  In the crushing roller, the larger one has an outer diameter of more than 2 m and a width of more than 50 cm. Moreover, not only the outer peripheral surface is curved in the rotational direction but also a spherical roller that is curved in the rotational axis direction, such as a bicycle tire, is used. When construction is performed on the outer peripheral surface of such a spherical roller curved in two directions, a groove having a depth corresponding to the height of a highly wear-resistant block is formed on the outer peripheral surface of the roller body made of easily welded steel on both sides. Except for the part, it is formed over the entire circumference. A large number of horizontally oriented flat bars made of easily welded steel are welded in the groove at predetermined intervals in the circumferential direction. Further, a plurality of short vertical flat bars facing in the circumferential direction are welded at predetermined intervals in a direction parallel to the roller axis between adjacent horizontal flat bars.

  As a result, a large number of bowl-shaped recesses formed in the axial and circumferential directions defined by the vertical and horizontal ribs are formed on the outer peripheral surface of the roller body. A large number of bowl-shaped recesses may be provided in a staggered manner. Finally, the wear-resistant metal is build-up welded in order in a large number of bowl-shaped recesses.

  In the build-up welding operation, since the roller is enormous, it is necessary to stand the roller, pivot it with a horizontal boss, and surround it with a scaffold. And in order to make work parts, such as a crevice to weld, turn up, a roller is rotated in the peripheral direction with progress of work. Since the concave portion faces right above the central portion in the rotation axis direction, the welding operation is relatively easy as long as the roller is rotated in the circumferential direction. However, on both sides, the recess is inclined to the side. A relatively small-diameter roller can be tilted sideways relatively easily, and the concave portion can be directed directly upward on both sides. However, in the case of a huge roller, it is difficult to incline it sideways, and therefore, it is necessary to perform overlay welding in a concave part that inclines sideways on both sides. As a result, a high level of skill is required, the work efficiency is remarkably lowered, and there is a concern that the quality stability is lowered.

  In this way, the crushing roller in which the block with high wear resistance and the block with low wear resistance are alternately arranged in the direction in which the material is bited (circumferential direction) is remarkably excellent in crushing performance and durability. In particular, it takes a lot of work to build up the wear-resistant metal, and as a result, it is very expensive. For this reason, the spread of demand is hindered at present, and price reduction has become a major issue.

  An object of the present invention is to provide a crushing surface member capable of greatly reducing the manufacturing cost.

  In order to achieve the above object, the crushing surface member of the present invention is used in a crusher of a type in which material is continuously bited between opposed crushing surfaces and pulverized, and a wear-resistant metal is applied to the crushing surface. A coated crushing surface member, comprising at least a member body having a surface layer portion made of an easily weldable metal and a composite in which a wear resistant metal is laminated on a surface of a base layer made of an easily weldable metal, A plurality of covering blocks arranged and fixed on the surface to cover the surface of the main body with the wear-resistant metal.

  As described above, it is very difficult to build up and weld a wear-resistant metal on the surface of a crushing surface member, for example, a giant crushing roller. However, manufacturing a composite coating block in which a wear-resistant metal is laminated on the surface of a base layer made of an easily weldable metal can be efficiently performed in a flow and operation in a factory. And the operation | work which joins this to the surface of the member main body of an abrasion-resistant member is joining of easily weldable metals, and it is markedly easy compared with build-up welding. The finished product will be coated with wear-resistant metal on the surface, and its mechanical performance will be inferior to that of the product with build-up welding of wear-resistant metal on the surface. Become.

  In a more preferred configuration of the present invention, lateral ribs having a height substantially equal to the thickness of the base layer in the covering block are formed on the surface of the member body at predetermined intervals in the material biting direction, and adjacent lateral ribs are formed. The covering blocks are arranged between the ribs, and the covering blocks arranged between the lateral ribs are fixed to the member main body by welding the base layer of each covering block and the lateral ribs sandwiching the base layer.

  According to this configuration, the horizontal rib formed on the surface of the member main body has the same height as the thickness of the base layer in the covering block and a lower height. For this reason, a horizontal rib and a base layer are simply joined by normal welding. In other words, by using short horizontal ribs, the coating blocks are easily fixed and arranged in the material biting direction, and the coating block row is arranged with a gap corresponding to the horizontal ribs in the material biting direction. Will be.

  If a material having a lower wear resistance than the wear-resistant metal is filled on the horizontal ribs between the coated block rows at almost the same height as the surface of the coated block, the block having a high wear resistance and The crushing surface structure at the beginning in which the blocks having low wear properties are alternately arranged in the direction in which the material is bitten can be realized very easily. As fillers (materials with low wear resistance) here, in addition to relatively low melting point metal materials typified by brazing materials (eg, low-fume nickel copper containing 10% Ni), as repair agents, etc. It is also possible to use a resin material such as an epoxy resin. Further, a structure in which a metal member having low wear resistance such as mild steel or high chromium cast iron liner is fitted and fixed by brazing or the like may be used. This construction is economical because it saves brazing material.

  In this block fixing structure using horizontal ribs, a plurality of vertical ribs can be formed at predetermined intervals between adjacent horizontal rib portions. The vertical ribs are also made of an easily weldable metal like the horizontal ribs, and have substantially the same height as the thickness of the base layer in the covering block. By using such vertical ribs together, the covering block is accommodated in the bowl-shaped recess, and the periphery is surrounded by the ribs, so that the fixing to the member main body becomes more reliable.

  As in the case of the transverse ribs, it is possible to fill the longitudinal ribs with a material having a lower wear resistance than that of the wear-resistant metal to the same height as the surface of the covering block. The horizontal rib and the vertical rib can be formed by welding another member such as a flat bar to the surface of the member main body, but can also be integrally formed by casting.

  With respect to the covering block, a through hole that penetrates through the wear-resistant metal layer and the base layer and reaches the back surface can be provided. If it does so, a base layer can be welded to the surface of the said member main body through this through-hole, and a coating | coated block can be fixed to a member main body without the above-mentioned horizontal rib and vertical rib. However, also in this case, the combined use with the horizontal rib and the vertical rib is not disturbed. By using the rib together, the covering block can be firmly bonded to the member main body.

  A recess remains on the surface of the coating block after welding with the member body, but this recess can be left as a slit for promoting biting, and a material having a lower wear resistance than the wear-resistant metal is used for the coating block. It is also possible to form blocks with low wear resistance by filling to approximately the same height as the surface. In any case, the through-hole is preferably a long hole that is long in the direction intersecting the material biting direction. By doing so, the performance as a block with low biting property and wear resistance is also improved.

  This long hole does not necessarily have to be perpendicular to the material biting direction, and may be inclined. It is not easy to construct a long hole for biting promotion or a block with low wear resistance obliquely with respect to the biting direction, but it is not possible to form a slanted long hole when manufacturing a coated block Easy. That is, by inclining the long hole in the covering block, it is possible to easily form a long hole for biting promotion inclined with respect to the biting direction and a block with low wear resistance.

  The through hole in the covering block can be used for positioning on the surface of the member main body. That is, the covering block is positioned in the direction along the surface of the member main body by providing the through-hole of the covering block with the convex portion inserted from the back side on the surface of the member main body.

  The convex portion is inserted into the base layer of the covering block, and preferably has a height that does not reach the wear-resistant metal layer. By doing so, this convex part can be welded with a base layer, and it can utilize for fixation of a covering block.

  With respect to the covering block, a concave portion formed in the metal layer or a concave portion that penetrates the wear-resistant metal layer and reaches the base layer can also be provided on the surface of the wear-resistant metal layer. The concave portion is preferably a long hole that is long in the direction intersecting the material biting direction.

  The recess can be left as a slit to promote biting, and a block with low wear resistance is filled with a material that is less wear resistant than wear resistant metal to the same height as the surface of the coated block. Can also be formed. In any case, the recess is preferably a long hole that is long in the direction intersecting the material biting direction. By doing so, the performance as a block with low biting property and wear resistance is also improved.

  This elongated hole does not necessarily have to be perpendicular to the material biting direction, and may be inclined. It is not easy to construct a long hole for biting promotion or a block with low wear resistance obliquely with respect to the biting direction, but it is not possible to form a slanted long hole when manufacturing a coated block Easy. That is, by inclining the long holes in the covering block, it is possible to easily form a recess for promoting biting that is inclined with respect to the biting direction and a block with low wear resistance.

  With respect to the covering block, a recess formed in the base layer or a recess that penetrates the base layer and reaches the wear-resistant metal layer can also be provided on the back surface of the base layer. Correspondingly, a convex portion to be inserted into the concave portion is provided on the surface of the member main body. By doing so, the covering block is positioned in the direction along the surface of the member body regardless of the through hole.

  The material of the member which comprises the crushing surface member of this invention is demonstrated. Specifically, as the easily weldable metal constituting at least the surface layer portion of the member main body, SF carbon steel forged product, SC carbon steel cast steel product, SS400 mild steel, 14% austenitic manganese steel, SCW410 cast steel for welded structure, etc. should be used. Can do.

  As the easily weldable metal constituting the base layer of the covering block, SS400 mild steel, SC carbon steel cast steel, carbon steel for machine structure, SF carbon steel forged product, cast steel for SCW410 welded structure, etc. Can be used.

As the wear-resistant metal that covers the base layer of the covering block, for example, a high chromium cast iron welding metal, a high chromium cast iron brazing material, a tungsten carbide cladding material, a super high alloy brazing material, or the like can be used. Particularly preferred is the abrasion resistant material of Japanese Patent No. 3066390 developed by the present applicant. This is a wear-resistant build-up material used for a surface member that receives high surface pressure friction of 50 kg / cm ³ or more, and C: 0.2 to 1.8% by weight%, Cr: 25% Hereinafter, a manganese austenitic alloy containing manganese as a main alloy component including Mn: 11 to 25%, Ni: 10% or less, and Si: 2.5% or less was manufactured separately in the matrix. This is a composite material in which high-hardness carbide particles are added and dispersed and mixed so as to occupy 20 to 70% of the cross-sectional area ratio.

  Finally, the shape and dimensions of the members constituting the crushing surface member of the present invention will be described. The shape and dimensions of the member main body are determined by the object. There are roller shapes and table shapes. As for the roller shape, there are the tire shape described above and the trapezoidal shape. As described above, the huge roller has an outer diameter exceeding 2 m, a width exceeding 50 cm, and a weight exceeding 10 tons.

  The planar shape of the covering block is basically a quadrangle, but may be a honeycomb shape, and the shape is not particularly limited. The thickness of the wear-resistant metal layer in the covering block is determined by the object. That is, it is determined by the durability required for the object. The thickness of the base layer is preferably 0.3 to 0.7, particularly preferably 0.4 to 0.5, where the thickness of the wear-resistant metal layer is 1. If the base layer is too thin compared to the wear-resistant metal layer, the allowance for bonding with the ribs is reduced, which may lead to insufficient bonding strength. On the other hand, if it is too thick, the joining margin increases more than necessary, and the amount of expensive filler to be filled thereafter increases, which increases the product manufacturing cost.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partially broken front view of a crushing roller showing an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line AA showing a manufacturing process of the crushing roller.

  The crushing surface member of the present embodiment is a crushing roller used in a crusher for cement raw material, slag, various ores, and the like, and is a spherical roller whose outer circumferential surface is curved in the circumferential direction and the axial direction. The crushing roller includes a roller body 10 made of easily welded steel such as SCW410 welded cast steel, and a plurality of coating blocks 20 that are fixedly arranged in a staggered manner in the circumferential direction and the axial direction on the outer peripheral surface of the roller body 10. , 20...

  As described above, the roller body 10 is a spherical roller whose outer peripheral surface is curved in the circumferential direction and the axial direction. A circumferential groove 11 having an arc-shaped cross section extending in the circumferential direction of the roller is provided on the outer peripheral surface over the entire circumference except for both sides. The depth of the circumferential groove 11 is the same as the thickness of the covering block 10.

  The circumferential groove 11 is provided with a large number of transverse ribs 12 curved in the roller axial direction at equal intervals in the roller circumferential direction. Here, the horizontal rib 12 is used by bending a flat bar and is fixed in the circumferential groove 11 by welding, but it can also be formed integrally by casting. By providing a large number of lateral ribs 12 in the circumferential groove 11, the circumferential groove 11 is subdivided into a large number of lateral grooves 13 curved in the roller axial direction in the roller circumferential direction.

  The lateral rib 12 is made of the same easily welded steel as the roller body 10, and its height is lower than the depth of the circumferential groove 11, and specifically corresponds to the thickness of the base layer in the covering block 20. The interval between the lateral ribs 12, 12 adjacent in the roller circumferential direction, that is, the width of the lateral groove 13 corresponds to the depth of the covering block 20.

  The covering blocks 20, 20... Are rectangular blocks, and extend from one side end of the lateral groove 13 to the other side end of each of the plurality of lateral grooves 13 formed on the outer peripheral surface of the roller body 10. Contained. Each coating block 20 has a two-layer structure in which an abrasion-resistant metal layer 22 is formed on a base layer 21 made of the same easily welded steel as the roller body 10.

  Here, the thickness of the base layer 21 is set to be equal to or slightly higher than the height of the lateral rib 12. And since the horizontal rib 12 is lower than the base layer 21, both welding becomes possible. And the covering block 20 is fixed in the horizontal groove 13 by welding the base layer 21 of the horizontal rib 12 and the covering blocks 20 and 20 on both sides. Since the welding here is welding of easily welded steels, a predetermined number of covering blocks 20, 20... Are securely and firmly fixed in each lateral groove 13 without gaps.

  At this stage, a narrow lateral groove is formed on the welded portion 14 on the lateral rib 12. Therefore, a filler 31 made of a brazing material or the like is filled in each lateral groove. The filler 31 is made of a material having lower wear resistance than the wear-resistant metal layer 22 in the covering block 20. In the case of a brazing material, the filler 31 is inserted into a lateral groove and then melted by gas heating, high-frequency induction heating, or the like. Thus, it can be firmly filled and fixed. It is possible to use an epoxy resin used as a repair agent, but in this case, heating is not necessary.

  Thus, on the surface of the crushing roller that is the crushing surface member of the present embodiment, the wear-resistant metal layer 21 that is a material with high wear resistance and the filler 31 that is a material with low wear resistance are This is repeated alternately in the roller circumferential direction, which is the material biting direction. Moreover, in the production of the crushing roller, the build-up welding of the wear-resistant metal is not required, and it can be produced simply and economically by only ordinary welding.

  The width W1 of the lateral rib 12 corresponds to the width of the material having low wear resistance. This width W1 is preferably 0.1 to 1 times the depth of the covering block 20 (width W2 in the material biting direction). If the width W1 of the lateral rib 12 is too small compared to the width W2 of the covering block 20, the material biting performance and the like will be insufficient. Conversely, if it is too large, the biting performance is improved, but the edge portion of the wear-resistant metal layer 22 in the covering block 20 is likely to be worn by the pulverized raw material, and early wear occurs.

  FIG. 3 is a block layout diagram of a crushing roller showing another embodiment of the present invention, and FIG. 4 is a cross-sectional view taken along the line BB in FIG.

  In the crushing roller according to the present embodiment, the vertical ribs 15 are formed between the covering blocks 20, 20... Arranged between the horizontal ribs 12, 12. The vertical ribs 15 are aligned at predetermined intervals in the roller axis direction between the adjacent horizontal ribs 12 and 12, and have the same material and the same height as the horizontal ribs 12 and 12. The base layer 21 of the covering block 20 is fixed to the lateral ribs 12 and 12 in the circumferential direction of the roller and is fixed to the longitudinal ribs 15 and 15 in the axial direction of the roller, thereby being firmly joined to the roller body 10. A filler 32 made of a brazing material having low wear resistance is also filled in the gaps on the welds 16, 16 of the vertical ribs 15, 15.

  FIG. 5 is a block layout diagram of a grinding roller showing still another embodiment of the present invention, and FIG. 6 is a cross-sectional view taken along the line CC in FIG.

  In the crushing roller of this embodiment, a large number of coating blocks 20 are arranged in a staggered pattern in the circumferential direction and the axial direction in the groove 11 of the roller body 10. The horizontal rib 12 and the vertical rib 15 are not used, and the covering blocks 20 and 20 adjacent in the roller circumferential direction and the axial direction are in contact with each other. Then, instead of using the lateral ribs 12 and the longitudinal ribs 15, a covering block 20 having a through hole 23 is used. The through hole 23 penetrates the base layer 21 and the wear-resistant metal layer 22 of the covering block 20 in the thickness direction, and is a long hole extending in the lateral width direction (roller axis direction) of the covering block 20.

  Each covering block 20 is fixed in the circumferential groove 11 of the roller body 10 by welding the base layer 21 to the bottom surface of the circumferential groove 11 of the roller body 10 through the through hole 23. The through-hole 23 is filled with a filler 33 made of a brazing material or the like that is laminated on the welded portion 24 and has low wear resistance.

  In such a grinding roller, the covering block 20 is fixed to the surface of the roller body 10 without ribs. On the surface of the covering block 20, the material portions having low wear resistance are formed in a straight line by arranging the fillers 33 in the roller axial direction, and this is intermittently repeated in the circumferential direction of the roller. A material having high wear resistance and a material having low wear resistance are alternately repeated.

  FIG. 7 is a block layout diagram of the crushing roller showing still another embodiment of the present invention, and FIG. 8 is a sectional view taken along the line DD in FIG.

  In the crushing roller of this embodiment, the lateral rib 12 described above is used in combination for fixing the covering block 20 having the through hole 23. The covering block 20 is fixed to the roller body 10 by welding the base layer 21 and the lateral rib 12 and welding the base layer 21 through the through hole 23 and the bottom surface of the circumferential groove 11. A filler 31 is filled on the welded portion 14 on the lateral rib 12. Since the filler 31 is a material with low wear resistance, it is not always necessary to fill the filler 33 on the welded portion 24 in the through hole 23. When the filler 33 is not filled on the welded portion 24 in the through hole 23, a horizontally elongated recess is formed here. Since this is used for improving biting property, there is no problem in leaving the recess. If the filler 33 is filled on the welded portion 24 in the through hole 23, a material line having low wear resistance is formed here.

  FIG. 9 is a block diagram of a crushing roller showing still another embodiment of the present invention, and FIG. 10 is a sectional view taken along line EE in FIG.

  In the crushing roller of this embodiment, the above-described vertical ribs 15 are used together to fix the covering block 20 having the through holes 23. Since the filler 32 on the welded portion 16 of the vertical rib 15 does not function as a material with low wear resistance that is repeated in the material biting direction, the filler 33 is filled on the welded portion 24 in the through hole 23. Is desired. The filler 33 filled on the welded portion 24 in the through hole 23 forms a material line having low wear resistance perpendicular to the biting direction.

  The covering ribs 20 having the through holes 23 can be used in combination with the horizontal ribs 12 and the vertical ribs 15.

  FIG. 11 is a cross-sectional view showing a block fixing structure of a crushing roller showing still another embodiment of the present invention.

  In the crushing roller of the present embodiment, the convex portion 17 that fits into the through hole 23 of the covering block 20 is integrally formed on the bottom surface in the circumferential groove 11 of the roller body 10. The protrusion 17 is a horizontally long type corresponding to the shape of the through hole 23, is set slightly lower than the thickness of the base layer 21 of the covering block 20, and is welded to the base layer 21. It is fixed on the bottom. By using the convex portion 17, the covering block 20 can be easily positioned, the concave portion formed on the welded portion 24 in the through hole 23 becomes shallow, and the thickness of the filler 33 filled in the concave portion can be reduced. Can be small.

  FIG. 12 is a block layout diagram of the crushing roller showing still another embodiment of the present invention, and FIG. 13 is a cross-sectional view taken along line FF in FIG.

  In the crushing roller of this embodiment, the covering block 20 has a recess 25 on the surface. The recess 25 is a depth that penetrates the wear-resistant metal layer 22 and reaches the surface of the lower base layer 21 and is a long hole that is long in the direction intersecting the material biting direction. It is a long hole slightly inclined with respect to the biting direction of the material.

  In the covering block 20, the recess 25 does not have a fixing function with respect to the roller body 10. For this reason, it fixes to the surface of the roller main body 10 using the horizontal rib 12 and the vertical rib 15 which were mentioned above. The recess 25 promotes the biting of the material by leaving it as a recess. When only the vertical ribs 15 are used for fixing the covering block 20, it is desirable to fill the recesses 25 with a filler 33 made of a material with low wear resistance.

  It is not easy to form an inclined slit for promoting the biting of the material on the surface of the grinding roller. However, the inclined slit can be easily formed by attaching the covering block 20 having the recessed portion 25 formed of an inclined long hole to the surface of the roller body 10. The recess 25 is provided in the wear-resistant metal layer 22 and does not need to reach the lower base layer 21.

  The width L of the covering block 20 is L2, the length in the biting direction is W2, and the length L1 (component perpendicular to the biting direction) of the through hole 23 and the recess 25 is (0.3 to 0.8) × L2. Is preferable, and (0.5 to 0.7) × L2 is particularly preferable. The slit width W3 (component in the biting direction) is preferably (0.1 to 0.4) × W2, particularly preferably (0.15 to 0.3) × W2. If L1 is too small, the biting effect is insufficient, and if it is too large, the mechanical strength of the covering block 20 is lowered. If the slit width W3 is too small, the biting effect is insufficient, and if it is too large, the mechanical strength of the covering block 20 decreases.

  Further, the inclination angle of the through hole 23 and the recess 25 (inclination angle with respect to a line perpendicular to the biting direction) is preferably 45 degrees or less. This is because if the inclination angle is excessive, the raw material crushing efficiency is lowered, and the shearing force is activated to increase the mixing ability.

Incidentally, the width L2 of the covering block 20 is practically preferable in the range of 40 to 80 mm, and the length W2 in the biting direction is preferably practically 30 to 60 mm. In terms of area, 1200 to 4800 mm ² is preferable. If the area of the covering block 20 is too small, the number of blocks becomes too large, and the mounting time becomes excessive, leading to an increase in cost. If it is too large, it will not follow the curved surface of the roller, and it will become angular, so the crushing resistance will increase. As described above, the planar shape of the covering block 20 is not limited to a quadrangle.

  FIG. 14 is a cross-sectional view showing a block fixing structure of a crushing roller showing still another embodiment of the present invention.

  In the crushing roller of the present embodiment, a recess 26 formed by recessing the base layer 21 is provided on the back surface of the covering block 20. On the other hand, a convex portion 18 that fits into the concave portion 26 is provided on the bottom surface of the circumferential groove 11 of the roller body 10. The convex portion 18 and the concave portion 26 are not related to the welding of the covering block 20. The covering block 20 is fixed by welding to the lateral rib 12. However, positioning of the covering block 20 is facilitated by providing the convex portion 18 and the concave portion 26. The convex portion 18 and the concave portion 26 may be circular, or may be oval corresponding to the through hole 23.

  Each of the above-described embodiments is a spherical roller used in a crusher for cement raw material, slag, various ores, etc., but may be a frustoconical crusher roller or a table on which the roller rolls. .

It is a partially broken front view of the crushing roller showing one embodiment of the present invention. It is AA sectional drawing which shows the manufacturing process of the same crushing roller. It is a block arrangement diagram of a crushing roller showing another embodiment of the present invention. It is BB sectional drawing in FIG. It is a block arrangement diagram of a crushing roller showing still another embodiment of the present invention. It is CC sectional drawing in FIG. It is a block arrangement diagram of a crushing roller showing still another embodiment of the present invention. It is DD sectional drawing in FIG. It is a block arrangement diagram of a crushing roller showing still another embodiment of the present invention. It is EE sectional drawing in FIG. It is sectional drawing which shows the block fixing structure of the crushing roller which shows another embodiment of this invention. It is a block arrangement diagram of a crushing roller showing still another embodiment of the present invention. It is FF sectional drawing in FIG. It is sectional drawing which shows the block fixing structure of the crushing roller which shows another embodiment of this invention.

Explanation of symbols

10 Roller body (member body)
DESCRIPTION OF SYMBOLS 11 Circumferential groove 12 Horizontal rib 13 Horizontal groove 14 Welded part 15 Vertical rib 16 Welded part 17,18 Convex part 20 Covering block 21 Base layer 22 Wear-resistant metal layer 23 Through-hole 24 Welded part 25,26 Concave part 31,32,33 Filler

Claims (16)

  A crushing surface member that is used in a crushing machine that continuously crushes material between opposed crushing surfaces and crushes the crushing surface. A member body made of a weldable metal and a composite body in which a wear-resistant metal is laminated on the surface of a base layer made of an easily weldable metal, and the surface of the member body is covered with the wear-resistant metal. A crushing surface member comprising a plurality of covering blocks arranged and fixed to each other.   On the surface of the member main body, lateral ribs having a height substantially equal to the thickness of the base layer in the covering block are formed at predetermined intervals in the material biting direction, and the covering blocks are arranged between adjacent lateral ribs. 2. The crushing surface member according to claim 1, wherein the covering blocks arranged between the lateral ribs are fixed to the member main body by welding the base layer of each covering block and the lateral ribs sandwiching the base layer. .   A material having a lower wear resistance than the wear-resistant metal is filled on the horizontal ribs between the adjacent coating blocks with the horizontal ribs interposed therebetween at substantially the same height as the surface of the coating block. The crushing surface member according to claim 2.   On the surface of the member body, vertical ribs having substantially the same height as the thickness of the base layer in the covering block are formed between a plurality of covering blocks arranged between adjacent horizontal ribs. The crushing surface member according to claim 2, wherein   A material having a lower wear resistance than the wear-resistant metal is filled on the vertical ribs between the adjacent coating blocks with the vertical rib interposed therebetween at substantially the same height as the surface of the coating block. The crushing surface member according to claim 4.   The covering block has a through-hole that penetrates the wear-resistant metal layer and the base layer and reaches the back surface, and the base layer is welded to the surface of the member main body through the through-hole. The crushing surface member according to claim 1, wherein the crushing surface member is fixed to the crushing surface member.   The said covering block is fixed to the surface of the said member main body together with the horizontal rib of Claim 2, The crushing surface member of Claim 6 characterized by the above-mentioned.   The crushing surface according to claim 6, wherein the covering block is fixed to the surface of the member main body in combination with the horizontal rib according to claim 2 and the vertical rib according to claim 4. Element.   The crushing surface member according to claim 6, wherein the through hole is a long hole that is long in a direction intersecting a material biting direction.   The crushing surface member according to claim 9, wherein the elongated hole is perpendicular to or inclined with respect to a material biting direction.   The said member main body is a crushing surface member of Claim 6 which has the convex part inserted in the through-hole of the said covering block from the back surface side on the surface.   The crushing surface member according to claim 11, wherein the convex portion is inserted into a base layer of the covering block and has a height that does not reach the wear-resistant metal layer.   The said covering block has the recessed part which penetrates the recessed part formed in the said metal layer, or an abrasion-resistant metal layer, and reaches a base layer on the surface of an abrasion-resistant metal layer, The Claim 1 characterized by the above-mentioned. The crushing surface member as described.   The crushing surface member according to claim 13, wherein the concave portion is a long hole that is long in a direction intersecting a material biting direction.   The crushing surface member according to claim 14, wherein the elongated hole is perpendicular or inclined with respect to a material biting direction.   The covering block has a recess formed in the base layer or a recess reaching the wear-resistant metal layer through the base layer on the back surface of the base layer, and the member body is inserted into the recess. The crushing surface member according to claim 1, further comprising a convex portion on a surface thereof.

Images