JP2006223964A - Biaxial shearing type disintegrator and production method of crushing blade - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a biaxial shearing type disintegrator which is capable of easily conducting the welding of a cutter and assuring a sufficient cutter hardness after welding. <P>SOLUTION: The first cutter 13 is provided with a disk member 15 fitted to a rotary shaft 11 and a cutter blade 16 which is welded to the outer periphery of the disk member 15. The second cutter 14 is provided with a plate 14a which is welded to the outer periphery of the rotary shaft 11 and a cured overlaying layer 14b installed to the prong of the plate 14a. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  In the present invention, the first rotating shaft and the second rotating shaft are arranged in parallel in the housing, and the first cutter attached to the first rotating shaft and the second cutter attached to the second rotating shaft cooperate with each other. The present invention relates to a biaxial shearing crushing apparatus for shearing and crushing crushed material and a method for producing a crushing blade of the biaxial shearing crushing apparatus.

  Conventionally, as a biaxial shearing type crusher of this type, as shown in FIG. 6A, two rotary shafts 51 and 52 are arranged in parallel in a housing (not shown), and these rotary shafts 51 are arranged in parallel. , 52 are known to be rotationally driven in opposite directions to each other (see Patent Document 1). In this crushing apparatus, a plurality of shear type cutters 53 and spacers 54 are alternately attached to the respective rotating shafts 51 and 52, and the respective rotating shafts 51 and 52 are driven to rotate in the direction indicated by the arrows, thereby facing each other. The object to be crushed in the housing is crushed by the cooperation of the blade portion 53a of the shearing cutter 53 and the spacer 54.

  Moreover, the rotary blade 60 as shown in FIG.6 (b) is known as another conventional example of a biaxial shearing crushing apparatus (refer patent document 2). The rotary blade 60 includes a rotary shaft 61, a tool post member 62 attached to the rotary shaft 61, and a spacer 63 attached to the rotary shaft 61 so as to be adjacent to both axial sides of the tool post member 62. The plurality of blade portions 64 are fixed to the peripheral edge of the tool post member 62 at a predetermined pitch, and the protruding blade portions 65 are formed on the outer peripheral edge of the spacer 63.

  In addition, there exists what was disclosed by patent document 3 as another prior art relevant to this invention. In the technique disclosed in this document, a crushing girder is fixed to the lower part of a crushing device, and a fixed blade provided in the crushing girder and a rotary blade (crushing blade) provided on a rotating shaft are used to form a crushing object. In what was made to perform the next crushing, it was comprised so that hardening overlay welding might be performed to the crushing surface of a fixed blade.

JP 2004-202455 A JP 2003-251212 A JP 2002-1149 A

  However, in the crushing blade structure shown in FIG. 6A, the crushing object is sandwiched and crushed by the blade portion 53a of the shearing cutter 53 and the spacer 54 having a cylindrical surface. Phenomenon such as a long material crushed material in the material to be crushed falls without being crushed and collides with the belt conveyor from a slight gap provided between the blade portion 53a of the shearing cutter 53 and the spacer 54. There is a disadvantage that the crushing effect cannot be obtained. On the other hand, in the crushing blade structure shown in FIG. 6B, the protruding blade portion 65 that faces the blade portion 64 fixed to the tool post member 62 is formed on the spacer 63 side. Since the object to be crushed that has fallen into the gap between the tool post members 62 is crushed by the protruding blade portion 65 of each spacer 63, an improvement in the crushing effect can be expected as compared with that of FIG.

  However, in the case of the rotary blade 60 shown in FIG. 6B, the protruding blade portion 65 is provided on the outer peripheral portion of the spacer 63 by integral molding, so that the protruding blade portion 65 has sufficient hardness. The entire spacer 63 must be made of a high-strength material, and it is necessary to fit the spacer 63 to the rotating shaft 61. Therefore, machining is difficult, and a high machining accuracy is required for the fitting portion. There is a problem.

  On the other hand, in the crusher disclosed in Patent Document 3, since the fixed blade of the crushing girder subjected to the hardfacing welding is disposed below the two rotating shafts, wear and breakage occurred. In this case, it is necessary to remove the rotating shaft and enter the lower part of the crushing box for repair, and there is a problem that the work is complicated.

  Therefore, in order to deal with such a problem, as shown in FIG. 7, in the crushing apparatus in which the first cutter 72 and the second cutter 73 are mounted on the outer periphery of the rotating shaft 71, the second cutter 73 is resistant to the damage. It is conceivable that the second cutter 73 is made of wear steel (for example, SAR500) and welded to the outer peripheral surface of the rotating shaft 71 made of, for example, alloy steel (for example, SCM440H). FIG. 7B is a view taken in the direction of arrow C in FIG.

However, in the case of the crushing blade structure shown in FIG. 7, the rotating shaft 71 and the second cutter 73, which are different from each other, are welded. Therefore, a preheating step is performed to prevent solidification cracking due to welding and cracking due to residual stress. In addition, it is necessary to perform a heat treatment by providing a post-heating step. For this reason, even if wear-resistant steel such as SAR500 is used for the second cutter 73, the wear-resistant steel is subjected to Rockwell hardness C scale (H _RC ) 30 due to these preheating, post-heating, or due to thermal effects due to welding. There is a problem that it is softened to the extent that sufficient hardness cannot be obtained.

  The present invention has been made to solve such problems, and it is intended to provide a biaxial shearing crushing apparatus that can easily weld a cutter and ensure sufficient hardness after welding. It is the purpose.

In order to achieve the above object, a biaxial shearing crusher according to the present invention comprises:
A plurality of first cutters and a plurality of second cutters provided on the shaft alternately at predetermined intervals in the axial direction, a plurality of first cutters and a plurality of second cutters; Are arranged in parallel so that the first cutter and the second cutter facing each other meet each other, with the second rotating shafts provided alternately on the shaft at predetermined intervals in the axial direction. In the biaxial shearing type crushing apparatus that shears and crushes the object to be crushed by cooperation with the second cutter,
The first cutter includes a disk member attached to the rotating shaft, and a cutter blade welded to the outer peripheral portion of the disk member, and the second cutter is a base member welded to the outer peripheral surface of the rotating shaft; In addition, a hardfacing layer provided at the tip of the base member is provided.

  In the present invention, it is preferable that the number of the cutter blades of the first cutter is the same as the number of the second cutters associated with the cutter blades.

Moreover, the manufacturing method of the crushing blade of the biaxial shear type crushing apparatus by this invention is the following.
In the method for manufacturing a crushing blade of a biaxial shearing crushing apparatus in which a plurality of first cutters and a plurality of second cutters are alternately provided on a rotating shaft in the axial direction,
A first step of applying at least one hardened layer on one end of the base member;
A second step of arranging and welding the disk members at predetermined intervals on the rotation axis;
A third step of welding the base member having the hardened layer on the outer peripheral surface of the rotating shaft to form a second cutter;
It comprises a fourth step in which a cutter blade is welded to the outer peripheral portion of the disk member to form a first cutter.

  According to the biaxial shearing crushing apparatus and the crushing blade manufacturing method according to the present invention, the second cutter having high wear resistance for crushing the object to be crushed in cooperation with the first cutter is provided. The crushed material can be finely cut. In addition, since the second cutter is configured to have a hardened layer by a hardened material having high resistance to temper softening at the tip of the base member made of plain steel, a hardened layer is formed on the base member. After that, the base member can be welded to the outer peripheral surface of the rotary shaft, and is less susceptible to thermal effects due to heat treatment during welding, preheating, and postheating. Moreover, sufficient hardness can be maintained even after welding by providing the hardfacing layer. Moreover, since this hardened build-up layer can be formed on the site where the crushing apparatus is used, it has good maintainability.

  Next, specific embodiments of the biaxial shearing crusher according to the present invention will be described with reference to the drawings.

  FIG. 1 shows a side view of a mobile crusher equipped with a biaxial shearing crusher according to an embodiment of the present invention, and FIG. 2 shows a plan view of the mobile crusher. FIG. 3 shows a plan view of the biaxial shearing crushing apparatus of the present embodiment, and FIG. 4 shows an A arrow view (a) and an B arrow view (b) of FIG. Has been. Furthermore, the principal part enlarged view of the biaxial shearing crushing apparatus of this embodiment is shown by FIG.

  In the present embodiment, the biaxial shearing crusher 1 is mounted on one side in the longitudinal direction of a vehicle body 3 having a pair of left and right traveling bodies 2 at the lower part, and has a hopper 4 at the upper part. An engine room 8 that houses driving sources such as an engine, a hydraulic pump, and a hydraulic valve is disposed on the other side in the longitudinal direction of the vehicle body 3. Further, a belt conveyor 9 is disposed between the left and right traveling bodies 2 below the vehicle body 3, and a base end portion 9a of the belt conveyor 9 is provided in the vicinity of the discharge port of the biaxial shearing crushing apparatus 1, and a carry-out end 9b. Is arranged on the opposite side of the hopper 4 in the longitudinal direction of the vehicle body 3. Thus, when a crushed object such as waste is loaded into the hopper 4 provided on one side in the longitudinal direction of the vehicle body 3 by the loader, the crushed object put in via the hopper 4 is converted into the biaxial shear type crusher 1. The crushed material falls from a discharge port provided in the lower part of the biaxial shearing crushing apparatus 1, passes through the base end portion 9 a of the belt conveyor 9, and the belt conveyor on the other side in the longitudinal direction of the vehicle body 3. 9 is discharged through an unloading end 9b.

  The biaxial shearing crusher 1 includes a housing 10 in which a first rotating shaft 11 and a second rotating shaft 12 are arranged in parallel, and the rotating shafts 11 and 12 are rotated in opposite directions to rotate the rotating shafts. The objects to be crushed are sheared and crushed by cooperation of cutters attached to 11 and 12 respectively.

  As shown in FIGS. 3 and 4, the first rotating shaft 11 (the second rotating shaft 12 has a substantially similar structure and will be described mainly with respect to the first rotating shaft 11). A gear 18 that is supported by a support side wall of the housing 10 through 17 and meshed with a gear 18A mounted on the second rotary shaft 12 is mounted next to the one-side bearing, and is rotated by a drive motor (not shown). A plurality of (eight in the present embodiment) first cutters 13 are arranged adjacent to both sides in the axial direction of the first cutter 13 at a predetermined interval on the outer periphery of the first rotary shaft 11. The second cutter 14 is welded. Here, the diameter of the second cutter 14 is formed to be smaller than the diameter of the first cutter 13 by at least the distance between the first rotating shaft 11 and the second rotating shaft.

  The first cutter 13 includes a flat disk member 15 attached to the first rotating shaft 11, and a cutter blade 16 that is inserted into the engagement groove 15 a formed on the outer periphery of the disk member 15 and welded. The shape of the cutter blade 16 is determined so that the outer peripheral surface of the cutter blade 16 forms an arc around the axis of the first rotation shaft 11 and the outer peripheral surface protrudes to the outermost periphery. As shown in FIG. 5, the first cutter 13 welded to the first rotating shaft 11 and the first cutter 13 welded to the second rotating shaft 12 have their cutter blades so as to be symmetrical with each other. Sixteen orientations have been determined. Further, four cutter blades 16 are provided at equal intervals around the rotary shafts 11 and 12, and eight disk members 15 to which the cutter blades 16 are attached are provided in the axial direction of the rotary shafts 11 and 12, respectively. .

  On the other hand, the second cutter 14 is attached so as to be disposed between the disk members 15 attached to the rotary shafts 11 and 12, as shown in FIG. The second cutter 14 is formed by providing a hardfacing layer 14b with a hardfacing material having a high resistance to temper softening at the tip (blade edge) of a plate 14a serving as a base member made of ordinary steel, and then the plate 14b. Is formed on the outer peripheral surface of the first rotating shaft 11. A chamfer 14c for avoiding interference with the weld bead of the first cutter 13 welded to the rotating shaft is formed on the base side of the plate 14a, and the crushing action is effectively exhibited on the tip side. For this purpose, a chamfered portion 14d is formed.

The cured build-up layer 14b is preferably a two-layer build-up layer using two types of weld metals. In this case, the material of the plate 14a is S45C (ordinary steel) with respect to the material SCM440H (alloy steel) of the rotating shaft 11, and the hardfacing layer 14b applied to the tip of the plate 14a has temper softening resistance. It is preferable to use a high hardening material, and use a weld metal having a relatively low hardness for the first layer, and use a weld metal having a higher hardness than the first layer for the second layer. More specifically, for example, the product name “Hard 500” (Rockwell hardness C scale (H _RC ) 46-49) of Shinnippon Seiyaku Co., Ltd. is used for the first layer, and the same product name for the second layer. "hard 700" (Rockwell hardness C scale _(H RC) 57 to 61) is used. Of course, the present invention is not limited to this, and it may be a single layer or three or more layers.

  In the present embodiment, as shown in FIG. 5, the first cutter 13 and the second cutter 14 attached to the first rotating shaft 11, and the first cutter 13 and the second cutter attached to the second rotating shaft 12. 14, the first cutter 13 on the first rotating shaft 11 side is associated with the second cutter 14 on the second rotating shaft 12 side, and the second cutter 14 on the first rotating shaft 11 side is the second rotating shaft. The phase is shifted in the circumferential direction in the axial direction so as to meet the first cutter 13 on the 12 side. In this way, when the rotary shafts 11 and 12 are rotated in the opposite direction (the arrow direction in FIG. 5), the object to be crushed is wound by the first cutter 13 and the first cutter 13 and the second cutter at the opposite positions. 14 to be crushed by being pressed.

According to this embodiment, the 2nd cutter 14 is set as the structure by which the hardfacing layer 14b was formed in the front-end | tip part of the plate 14a which consists of plain steel with the hardfacing material with a high tempering softening resistance. Then, after forming the hardfacing layer 14b on the plate 14a, the base portion of the plate 14a may be welded to the outer peripheral surface of the rotary shafts 11 and 12, and it is less susceptible to thermal effects during welding, preheating and postheating. There is. Further, even after welding, a sufficient Rockwell hardness C scale (H _RC ) of 50 or more can be secured for the cutter blade. Further, the cured build-up layer 14b has an advantage that it can be formed at the site of use of the crushing apparatus 1 even if it is worn. Moreover, since the 2nd cutter 14 is provided in the position which meets the cutter blade 16 of the 1st cutter 13, the shear efficiency of a to-be-crushed object can be improved significantly compared with the conventional one.

  In the present embodiment, the number of the cutter blades 16 and the number of the second cutters 14 provided in the first cutter 13 is described as being four, but the number may be other than four. In addition, the number of cutter blades 16 and the number of second cutters 14 do not necessarily have to be the same. If the cutter blades 16 and the second cutters 14 are set to be associated with each other, the number is appropriately selected. can do.

1 is a side view of a mobile crusher equipped with a biaxial shearing crusher according to an embodiment of the present invention. The top view of the mobile crusher carrying the biaxial shearing type crusher concerning this embodiment Plan view of the biaxial shearing crusher of this embodiment A view in FIG. 3 (a) and B view (b) The main part enlarged view of the biaxial shearing type crushing apparatus of this embodiment Diagram showing conventional crushing blade structure The figure which shows the example which welded the 2nd cutter to the rotating shaft

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Biaxial shearing crusher 2 Traveling body 3 Car body 4 Hopper 5 Vibrating feeder 9 Belt conveyor 10 Housing 11 1st rotating shaft 12 2nd rotating shaft 13 1st cutter 14 2nd cutter 14a Plate 14b Hardening layer 15 Disc member 16 cutter blade

Claims (3)

A plurality of first cutters and a plurality of second cutters provided on the shaft alternately at predetermined intervals in the axial direction, a plurality of first cutters and a plurality of second cutters; Are arranged in parallel so that the first cutter and the second cutter facing each other meet each other, with the second rotating shafts provided alternately on the shaft at predetermined intervals in the axial direction. In the biaxial shearing type crushing apparatus that shears and crushes the object to be crushed by cooperation with the second cutter,
The first cutter includes a disk member attached to the rotating shaft, and a cutter blade welded to the outer peripheral portion of the disk member, and the second cutter is a base member welded to the outer peripheral surface of the rotating shaft; A biaxial shearing type crushing apparatus comprising a hardfacing layer provided at the tip of the base member.   2. The biaxial shearing crushing apparatus according to claim 1, wherein the number of the cutter blades of the first cutter is the same as the number of the second cutters associated with the cutter blades. In the method for manufacturing a crushing blade of a biaxial shearing crushing apparatus in which a plurality of first cutters and a plurality of second cutters are alternately provided on a rotating shaft in the axial direction,
A first step of applying at least one hardened layer on one end of the base member;
A second step of arranging and welding the disk members at predetermined intervals on the rotation axis;
A third step of welding the base member having the hardened layer on the outer peripheral surface of the rotating shaft to form a second cutter;
A method of manufacturing a crushing blade for a biaxial shearing crushing apparatus, comprising a fourth step of welding a cutter blade to the outer peripheral portion of the disk member to form a first cutter.

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