JP5081993B2 - Regenerated cutting blade and shear crusher - Google Patents

Description

  The present invention relates to a regenerated cutting blade and a shearing crusher used in a shearing crusher.

  Conventionally, a shearing type crusher that shears and crushes solid objects to be crushed such as plastic, wood pieces, paper, metal, rubber, fibers, and leather is known. For example, as this type of shearing crusher, there is a shearing crusher previously filed by the present applicant (see Patent Document 1).

  As shown in the cross-sectional view of the shearing type crusher of FIG. 11 and the CC cross-sectional view of FIG. 12, this shearing type crusher 100 has a plurality of rotations in the axial direction of the rotary shafts 101 and 102. The blades 103 are alternately provided with the spacers 104 interposed therebetween. As shown in FIG. 11, the spacer 104 is formed to have an outer diameter that allows the base of the rotary blade 103 to be positioned in the axial direction, whereby the rotary blade 103 is positioned in the axial direction and is detachably attached.

  As shown in FIG. 11, these rotary blades 103 are detachably attached to a blade base portion 106 that is detachably attached to the rotary shafts 101 and 102, and surrounds the periphery of the blade base portion 106. In the state where an axial clearance of about 0.5 mm to 1 mm, for example, is provided between the opposing side surfaces of the rotary blade 103 that rotates in the rotational direction R side. It arrange | positions in the state which overlapped so that the mutual cutting blade 105 might mesh.

  The cutting blade 105 provided on the outer periphery of the rotary blade 103 pulls the object 120 to be crushed and crushes the object 120 to be crushed by a shearing action between the rotating blades 103 facing each other.

  Further, as shown in FIG. 13, an engagement step portion 107 is provided on the mounting surface of the cutting blade 105, and this engagement step portion 107 is engaged with an engagement protrusion 108 provided on the blade base portion 106. The crushing reaction force is received. This split-type cutting blade 105 includes a tip edge portion 109 that is pointed in the rotation direction of the blade tip portion 127 that protrudes outward, and a side edge portion 110 (side edge) formed along the side outer edge portion. Yes.

  As shown in FIGS. 14 (a) and 14 (b), these edge portions 109 and 110 wear early due to shear crushing. By making the cutting blade 105 having these edge portions 109 and 110 into a split type, Even if the edge portions 109 and 110 are worn, only the cutting blade 105 can be replaced.

  By the way, the cutting blade 105 in this type of shearing crusher 100 draws and crushes the object to be crushed at the front edge portion 109 and shears and crushes at the front edge portion 109 and the side edge portion 110. Early wear occurs in the portion 109 and the side edge portion 110. M shown in FIGS. 14A and 14B is a worn part.

  This early wear is wear in which the tip edge portion 109 and the side edge portion 110 are rounded (round shape). When this wear occurs, the crushing performance is lowered and the crushing efficiency is lowered. Further, depending on the object to be crushed, a defect or the like may occur in the edge portions 109 and 110. Even if this defect occurs, the crushing performance is lowered and the crushing efficiency is lowered.

  And when abrasion arises in this way, crushing performance falls and crushing efficiency falls, as shown in FIG.14 (b), the clearance gap S1 between the side surface of the cutting blade 105 adjacent to each other, This is because the size of the worn portion M is doubled and the object to be crushed enters and leaves the wide gap S1.

  For this reason, when such wear / breakage occurs (generally, these “wear” and “breakage” are collectively referred to as “wearing”), generally, a new cutting blade 105 is replaced each time. Yes.

JP-A-8-323232

  However, even with the crusher 100 that employs the above-described split type cutting blade 105, for example, several tens of cutting blades 105 are used in one unit, and a large amount of cost is required for replacement. It takes effort.

  In addition, such a cutting blade 105 is entirely made of an expensive material such as alloy tool steel in order to improve wear resistance, and a shearing type in which many cutting blades 105 are used as described above. In the case of the crusher 100, it is very expensive to replace all of the cutting blades 105 with new ones. Also, it does not make effective use of resources.

  The present invention has been made to solve the above-mentioned problems, and can be efficiently regenerated while reducing the cost and labor for regenerating the cutting blade, and is used by being attached to a shearing crusher. Then, it aims at providing the regenerated cutting blade which can make the crushing efficiency of a shearing crusher close to a new cutting blade, and the shear crusher using the same.

  The regenerated cutting blade according to the present invention includes a fixed portion and a blade edge portion that protrudes radially outward from the fixed portion, and the blade edge portion has a tip edge portion that is pointed in the rotation direction. The side edge portion includes a side edge portion at a side outer edge portion including the blade edge portion, and the tip edge portion and the side edge portion are formed by regeneration processing by overlay welding, and the side surface is rotated from the side edge portion. 1 or 2 or more is formed by the reproduction | regeneration process of the penetration prevention build-up welding part of the to-be-crushed object extended toward the center side or center direction of this.

  According to the regenerated cutting blade according to the present invention, the object to be crushed is sandwiched between the regenerated cutting blade and the counterpart cutting blade, and the object to be crushed is used to sequentially shear and crush. be able to. Of the side surfaces of the regenerated cutting blade, the blade width is reduced due to wear of the cutting blade at the portion where the through-welding build-up welded portion is not formed, but the slip-through preventing built-up welded portion is formed. The width of the blade can be increased by the height of the build-up of the slip-through prevention build-up weld. Thus, when the object to be crushed is sheared and crushed, between the regenerated cutting blade side surface, the build-up prevention weld overlay and the side surface of the counterpart cutting blade arranged to face this side surface The size of the gap can be made as close as when the cutting blade is new.

  Therefore, when the object to be crushed is sheared and crushed, the object to be crushed, especially a long object, passes through the gap between the side surface of the regenerated cutting blade and the side surface of the counterpart cutting blade without being crushed. Can be suppressed.

  In addition, since the tip edge portion and the side edge portion of the regenerated cutting blade are formed by regeneration processing by overlay welding, the crushing ability can be brought close to a new cutting blade.

  The regenerated cutting blade according to the present invention may be formed such that the slip-through prevention build-up welded portion passes through a side surface of the blade tip portion.

  This cutting edge part is a part that shears and crushes the material to be crushed, and when shearing and crushing is performed, the side of the blade edge part of the regenerated cutting blade and the other side of the cutting that is arranged to face this side. The object to be crushed enters the gap between the side of the blade and tries to pass through, but the object to be crushed enters and gets through this gap by the build-up prevention weld overlay formed so as to pass through the side of the blade tip. This can be effectively suppressed.

  In the regenerated cutting blade according to the present invention, the blade width of the regenerated cutting blade in the slip-through prevention build-up welded portion may be substantially the same as the blade width of a new cutting blade.

  In this way, when the object to be crushed is sheared and crushed, the object to be crushed, particularly a long object, is not crushed from the gap between the side surface of the regenerated cutting blade and the side surface of the counterpart cutting blade. Can be kept as low as when a new cutting blade is used.

  The regenerated cutting blade according to the present invention has a spacer abutting portion in which a side surface of the regenerated cutting blade abuts against a spacer that positions the regenerated cutting blade in the axial direction of the rotation center thereof. The slip-through prevention build-up welded portion may be formed at a distance from the spacer contact portion.

  In this way, when the build-up build-up welded part is formed on the side surface of the worn cutting blade by welding, the spacer contact part is deformed by the heat of this welding, or a part of this build-up weld part Can be prevented from being formed on the surface of the spacer contact portion. As a result, when the regenerated cutting blade is attached to the shearing type crusher, the regenerated cutting blade can be smoothly mounted and attached in a gap of a predetermined dimension formed between the spacers. it can. Further, the regenerated cutting blade can be accurately positioned in the axial direction of the center of rotation by the spacer.

  A shearing crusher according to the present invention includes a rotary blade in which a plurality of regenerated cutting blades according to the present invention are detachably attached to a blade base portion, and the rotary blades are respectively first and second. Two or more rotary shafts are provided, and a spacer is provided on each of the first and second rotary shafts so as to sandwich the rotary blades from both sides, and a first rotary blade provided on the first rotary shaft; The material to be crushed is sheared and crushed between the second rotating blade provided on the second rotating shaft.

  According to the shearing type crusher according to the present invention, the object to be crushed can be sheared and crushed between the first rotating blade and the second rotating blade by rotating the first and second rotating shafts. The regenerated cutting blade provided in this shearing crusher operates in the same manner as the regenerated cutting blade according to the present invention.

  In the regenerated shearing crusher according to the present invention, when the object to be crushed is sheared and crushed between the rotating first rotating blade and the second rotating blade, the regeneration provided in the first rotating blade The slip-through buildup welded portion of the first cutting blade that has been made and the slip-up buildup welded portion of the regenerated second cutting blade included in the second rotary blade are in a state of facing each other. Further, each of the slip-through prevention build-up welds can be formed.

  In this way, when shear crushing is performed, the gap between the side surface of the regenerated first cutting blade and the side surface of the regenerated second cutting blade disposed opposite to the side surface is covered. The crushed material enters and tries to pass through, but the regenerated build-up welded portion of the first cutting blade and the regenerated build-up welded portion of the second cut blade face each other. Thus, the gap can be narrowed by the pair of slip-preventing build-up welds. As a result, it is possible to effectively prevent the object to be crushed from entering or leaving the gap.

  According to the regenerated cutting blade and the shearing type crusher according to the present invention, when shearing and crushing an object to be crushed, among the side surfaces of the regenerated cutting blade, the slip-through prevention build-up welded portion and the counterpart cutting blade Since it was set as the structure which can suppress that a to-be-crushed object slips through without being crushed from the clearance gap between the side surfaces of this, when this regenerated cutting blade is attached to a shearing type crusher and used, or According to the shearing crusher to which the regenerated cutting blade is attached, the crushing efficiency of the shearing crusher can be brought close to the crushing efficiency when a new cutting blade is attached to the shearing crusher.

  Then, by forming a slip-through preventive build-up weld on a part of the side surface instead of the entire side surface of the worn cutting blade, the cost, time, and labor for regenerating the worn cutting blade are reduced. be able to.

It is a perspective view showing the regenerated cutting blade concerning one embodiment of the present invention. (A) is a side view showing the regenerated cutting blade shown in FIG. 1, and (b) is from the AA direction showing the gap between the rotating blades having the regenerated cutting blade shown in FIG. 1 (a). FIG. It is a side view of a rotary blade provided with the regenerated cutting blade shown in FIG. (A) is a front view of the rotary blade shown in FIG. 3, (b) is BB sectional drawing of the rotary blade shown in FIG. It is a perspective view of the rotary blade shown in FIG. It is a side view which shows the state which overlapped so that the two rotary blades shown in FIG. 3 might mesh. (A)-(b) is a perspective view which shows the manufacturing method of the reproduction | regeneration cutting blade shown in FIG. (A)-(b) is a perspective view which shows the manufacturing method of the reproduced | regenerated cutting blade following FIG. (A)-(b) is a perspective view which shows the manufacturing method of the reproduced | regenerated cutting blade following FIG. It is a side view which shows the state which overlapped so that the cutting blade concerning other embodiment of this invention might mesh. It is a cross-sectional view showing a conventional shearing type crusher. It is CC sectional drawing of the shearing type crusher shown in FIG. It is a perspective view which shows a new rotary blade. (A) is a perspective view which shows the worn rotary blade, (b) is sectional drawing which shows the clearance gap between rotary blades provided with the worn cutting blade shown to Fig.14 (a).

  Hereinafter, an embodiment of a regenerated cutting blade according to the present invention and a shearing crusher including the same will be described with reference to FIGS. When the rotary blade 103 including the new cutting blade 105 shown in FIG. 13 is attached to the shear crusher 100 shown in FIGS. 11 and 12 and used for a certain period of time or more, the leading edge portion 109 and the side edge portion 110 are used. At present, the crushing performance is reduced due to wear, resulting in a reduction in crushing efficiency.

  Then, as shown in FIGS. 14A and 14B, the leading edge 109 and the side edge 110 of the cutting blade 105 become rounded due to wear, and the edges 109 and 110 may be damaged. is there.

  In this way, particularly when the side edge portion 110 is worn and the dimension of the blade width W1 of the cutting blade 105 shown in FIG. 14B is reduced, this worn cutting blade attached to the shear breaking type crusher 100. Between the side surfaces facing each other, a gap S1 that is larger than a predetermined value is formed, and the crushing efficiency is lowered.

  Therefore, repairing (regeneration processing) is performed on the tip edge portion 109 and the side edge portion 110 of the cutting blade 105 that have been worn in this manner using a cutting blade regeneration method and a regeneration facility (not shown). Thus, the worn cutting blade 105 can be regenerated and reused. The cutting blade 105 regenerated in this way is the regenerated cutting blade 105 (see FIG. 1) according to the present invention.

  Further, a new cutting blade 105 provided in the rotary blade 103 shown in FIG. 13 is formed along a tip edge portion 109 pointed in the rotation direction R side of the blade edge portion 127 protruding outward in the radial direction and a side edge portion. Side edge portion 110. An engagement step portion 107 is provided on the mounting surface of the cutting blade 105 (the lower surface of the fixed portion 125), and this engagement step portion 107 is engaged with the engagement protrusion 108 provided on the blade base portion 106. Combined, it receives a crushing reaction force.

  As shown in FIGS. 14A and 14B, these edge portions 109 and 110 are worn by shear crushing, but the cutting blade 105 having these edge portions 109 and 110 is a split type, so Even if the portions 109 and 110 are worn, only the cutting blade 105 can be replaced without replacing the blade base portion 106.

  Moreover, 126 shown in FIG. 13 is a bolt insertion hole. The bolt insertion hole 126 is for inserting a fixing bolt for detachably attaching the cutting blade 105 to the blade base portion 106.

  Next, the regenerated cutting blade 105 shown in FIG. 1 according to the present invention will be described. The regenerated cutting blade 105 is obtained by performing a regenerating process on the worn cutting blade 105 included in the rotary blade 103 shown in FIG.

  As shown in FIGS. 1 and 2, the regenerated cutting blade 105 is formed by regenerating the tip edge portion 109 and the side edge portion 110 by overlay welding.

  Then, on the side surface of the regenerated cutting blade 105, the build-up prevention weld overlays 111, 112, 113 of the crushed object 120 extending from the side edge portion 110 toward the rotation center direction (or the rotation center side) are provided. 1 or 2 or more, for example, three are formed by reprocessing by overlay welding or the like. The center direction of the rotation is the center direction of the rotation of the rotary blade 103 including the regenerated cutting blade 105 as shown in FIG.

  Moreover, as shown in FIG.1 and FIG.2, the slip-through prevention overlay welding parts 111-113 are formed in the side surface of the cutting blade 105 by strip | belt shape with predetermined length and width | variety. In this embodiment, the first slip-through preventing build-up welded portion 111 is formed at a position that passes through the side surface of the blade edge portion 127 and also passes through the vicinity of the tip edge portion 109. And the 2nd slip-through prevention build-up weld part 112 is formed in the position on the opposite side to the 1st slip-through prevention build-up weld part 111 on the basis of the scooping surface 127a of the blade edge part 127. Further, the third slip-through prevention build-up welded portion 113 is formed at a position away from the scooping surface 127a toward the counter-rotation direction with respect to the scooping surface 127a of the blade edge portion 127 as a reference. Has been.

  Further, as shown in FIG. 2B, the blade width W2 of the regenerated cutting blade 105 in the first to third slip-through prevention build-up welds 111 to 113 is substantially the same as the blade width W2 of the new cutting blade 105. It is formed to be the same. Similarly, the blade width W2 of the regenerated cutting blade 105 at the side edge portion 110 is formed to be substantially the same as the blade width W2 of the new cutting blade 105.

  As shown in FIGS. 2A and 2B, the side surface of the regenerated cutting blade 105 is arranged so that the regenerated cutting blade 105 has an axial direction of the rotation center (the axial direction of the rotation shafts 101 and 102). A spacer abutting portion 114 that abuts against the spacer 104 for positioning. And the 1st-3rd slip-through prevention build-up welding parts 111-113 are formed at intervals with the spacer contact part 114.

  The surface of the spacer contact portion 114 is in contact with the spacer 104 and is not in contact with the object to be crushed 120. Therefore, the blade width W2 is the same as the blade width W2 of the new cutting blade 105. It has become.

  As shown in FIGS. 3 to 5, the regenerated cutting blade 105 configured as described above is, for example, five bolts that are detachably attached to the blade base portion 106, and thus the rotary blade 103. Can be produced. As shown in FIG. 11, two or more rotary blades 103 are provided on each of the first and second rotary shafts 101 and 102 as in the prior art. As shown in FIG. The spacers 104 are arranged so as to sandwich the spacer contact portions 114 on both sides of the cut blade 105 from both sides, and are used by being attached to the shearing crusher 100.

  According to the shear crusher 100, as shown in the side view of FIG. 6, the plurality of first rotary blades 103 provided on the first rotary shaft 101 and the plurality of second rotary shafts provided on the second rotary shaft 102 are provided. The object 120 to be crushed can be sandwiched between the rotary blade 103 and sheared.

  As shown in FIG. 6, when the object 120 is sheared and crushed between the first rotary blade 103 and the second rotary blade 103, that is, the cutting blade 105 of the first rotary blade 103, When rotating in a range T in an overlapped state so that the cutting blades 105 of the two rotary blades 103 are engaged with each other, the slip-through prevention build-up welds 111 to 111 of the first cutting blade 105 regenerated of the first rotary blade 103 are used. 113 and the slip-through prevention build-up welded portions 111 to 113 of the second cutting blade 105 regenerated of the second rotary blade 103 are in a state of facing each other or at substantially the same rotational position, respectively. The slip-through prevention build-up welds 111 to 113 are formed.

  Next, the operation of the regenerated cutting blade 105 configured as described above and the shearing crusher 100 to which the cutting blade 105 is attached will be described. According to the shearing crusher 100 to which the regenerated cutting blade 105 is attached, the regenerated cutting blade 105 attached to the first rotating shaft 101 and the second rotating shaft 102 are connected to each other as shown in FIG. The object to be crushed 120 can be sandwiched between the regenerated cutting blade 105 attached to the other side, and the object to be crushed 120 can be sheared and crushed sequentially.

  Then, as shown in FIG. 2B, in the portion of the side surface of the regenerated cutting blade 105 where the slip-through prevention build-up welds 111 to 113 are not formed, the blade width W1 is caused by wear of the cutting blade 105. However, in the portion where the slip-through prevention build-up welds 111 to 113 are formed, the blade width becomes W2, and it is increased by the build-up height of the slip-through prevention build-up welds 111 to 113. Can do. As a result, when shearing and crushing the object 120 to be crushed, among the regenerated side surfaces of the cutting blade 105, the slip-through prevention build-up welded portions 111 to 113 and the other side disposed facing this side surface are regenerated. Among the side surfaces of the cutting blade 105, the dimension S2 of the gap between the slip-through prevention build-up welds 111 to 113 can be made as close as when the cutting blade 105 is new.

  Accordingly, when the object to be crushed 120 is sheared and crushed, the object to be crushed 120, particularly a long object, is generated from the gap S2 between the side surface of the regenerated cutting blade 105 and the side surface of the regenerated cutting blade 105 on the other side. It is possible to suppress slipping through without being crushed.

  As described above, the possibility that the long material to be crushed 120 may pass through without being crushed can be reduced by the slip-prevention build-up welded portions 111 to 113 that cause the crushed material 120 including the long material to have a gap. The object 120 can be prevented from slipping through S2, and the crushed object 120 is crushed to a relatively short length equal to or less than the pitch by the five regenerated cutting blades 105 attached to the rotary blade 103 shown in FIG. Because it can.

  In addition, since the front edge portion 109 and the side edge portion 110 of the regenerated cutting blade 105 are formed by reprocessing by build-up welding, the crushing ability can be brought close to the new cutting blade 105. Accordingly, when the regenerated cutting blade 105 is used by being attached to the shearing crusher 100, the crushing efficiency of the shearing crusher 100 is the same as the crushing efficiency when the new cutting blade 105 is attached to the shearing crusher 100. Can approach.

  Further, as shown in FIG. 1, the worn-off cutting blade 105 is regenerated by forming the slip-through prevention build-up welds 111 to 113 not on the entire side surface of the worn cutting blade 105 but on a part of the side surface. It is possible to reduce the cost, time, and labor for the operation.

  The cutting edge portion 127 of the cutting blade 105 shown in FIG. 2A is a portion for shearing and crushing the object 120 to be crushed, and when the shearing crushing is performed, the blade edge portion 127 of the regenerated cutting blade 105 is recovered. The object 120 to be crushed enters and leaves the gap S2 between the side surface and the side surface of the reconstructed cutting blade 105 disposed opposite to the side surface. By the slip-through prevention build-up welds 111 to 113 formed so as to pass through the vicinity, the object 120 to be crushed can be effectively suppressed from entering and entering the gap S2.

  Further, as shown in FIG. 2B, if the blade width W2 of the regenerated cutting blade 105 in the slip-through prevention build-up welds 111 to 113 is substantially the same as the blade width W2 of the new cutting blade 105, When the crushed object 120 is sheared and crushed, the object 120, particularly a long object, is not crushed from the gap S2 between the side surface of the regenerated cutting blade 105 and the side surface of the regenerated cutting blade 105 on the other side. The possibility of slipping through can be suppressed as low as when a new cutting blade 105 is used.

  As described above, the reason why the possibility that the long material to be crushed 120 can pass through without being crushed can be suppressed is the same as described above.

  Further, as shown in FIG. 1, the slip-through prevention build-up welded portions 111 to 113 are formed at a distance from the spacer contact portion 114, so that the slip-off prevention build-up is formed with respect to the side surface of the worn cutting blade 105. When the welded portions 111 to 113 are formed by welding, the spacer contact portion 114 is deformed by the heat of the welding, or a part of the buildup weld portion is formed on the surface of the spacer contact portion 114. Can be prevented. As a result, when the regenerated cutting blade 105 is attached to the blade base portion 106 of the shear crusher 100, the regenerated cutting blade is inserted into a gap of a predetermined dimension formed between the spacer 104 and the spacer 104. 105 can be installed smoothly. Further, the regenerated cutting blade 105 can be accurately positioned by the spacer 104 in the axial direction of the rotation center (the axial direction of the rotary shafts 101 and 102).

  Further, as shown in FIG. 6, the first cutting blade 105 regenerated by the first rotary blade 103 and the regenerated second cutting blade 105 of the second rotary blade 103 are overlapped so as to mesh with each other. When rotating in the range T, the slip-through preventive build-up welds 111 to 113 of the first cutting blade 105 regenerated by the first rotating blade 103 and the regenerated second cutting blade 105 of the second rotating blade 103 slipped through. The slip-through prevention build-up welds 111 to 113 are formed so that the prevention build-up welds 111 to 113 are in a state of facing each other or at substantially the same rotational position.

  In this way, when shear crushing is performed, the regenerated first cutting blade 105 side surface of the first rotating blade 103 and the regenerated second rotating blade 103 disposed opposite to the side surface are regenerated. The to-be-crushed object 120 enters the clearance S2 between the side surfaces of the two cutting blades 105 and tries to pass through, but the slip-through prevention build-up welds 111 to 113 of the regenerated first cutting blade 105 and the regenerated first The slip-off preventing build-up welds 111 to 113 of the two cutting blades 105 are in a state of facing each other, and the gap S2 can be narrowed by the pair of slip-preventing build-up welds 111 to 113. Thereby, it can suppress effectively that the to-be-crushed object 120 enters and leaves this clearance gap S2.

  Next, a method for regenerating the cutting blade according to this embodiment will be described. As shown in FIG. 7 (a), the cutting blade regeneration method is applied to the tip edge portion 109 and the side edge portion 110 of the worn cutting blade 105 shown in FIGS. 14 (a) and 14 (b). Chamfering step, and as shown in FIGS. 7B, 7C, 8, and 9, the chamfered tip edge portion 109 and the side edge portion 110, and the side surface of the cutting blade 105 On the other hand, it includes a build-up welding process in which build-up welding is performed, and a machining process in which the build-up weld portion of the cutting blade 105 is reprocessed so as to have a predetermined shape as shown in FIG. In this manner, a regenerated cutting blade 105 (see FIG. 1) that can be reused by regenerating the repaired cutting blade 105 can be manufactured.

  FIGS. 7A to 7C are perspective views showing a method of manufacturing the regenerated cutting blade 105 shown in FIG. 1, and FIGS. 8A to 8C are regenerated cuttings subsequent to FIG. FIGS. 9A to 9C are perspective views illustrating a method for manufacturing the regenerated cutting blade following FIG. 8. Based on these drawings, a manufacturing process of the regenerated cutting blade 105 will be described. In these drawings, for the sake of explanation, symbols (A) to (F) are attached to the respective angular positions of the cutting blade 105, and (1) to (13) are attached in the order of work.

  First, as shown in FIG. 7A, predetermined chamfers 10 and 11 are applied to the leading edge portion 109 and the side edge portion 110 of the cutting blade 105.

  Next, as shown in FIG. 7 (b), arc spot welds 12 and 13 of the hardfacing welding material are sequentially applied to the positions (A) and (B) at both ends in the thickness direction of the leading edge portion 109 by the welding nozzle 8. Perform [(1), (2)].

  Then, as shown in FIG. 7C, build-up welding 14 is performed between the arc spot welds 12 and 13 of the leading edge portion 109 with a hard build-up welding material [(3)]. The build-up welding 14 is performed from the position (A) where the arc spot welding 12 is performed first to the position (B), and effective welding prevention by the arc spot welding 12, 13 is achieved.

  Further, since the tip edge portion 4 is severely worn away, as shown in FIG. 8 (a), by performing the build-up welding 14 with at least two layers, a portion having high hardness is increased, and the impact resistance of the tip edge portion 109 is increased. Abrasion resistance can be improved, which is preferable.

  Next, as shown in FIG. 8 (b), arcs are formed with a hardfacing welding material at the positions of both ends (C) and (D) in the thickness direction of the acute angle portion at the end in the counter-rotating direction of the side edge portion 110. Spot welding 15 and 16 are performed in order [(4), (5)].

  Then, as shown in FIG. 8 (c), the metal is directed from the positions of the ends (C) and (D) where the arc spot welding 15 and 16 are performed toward the positions (A) and (B) of the leading edge 109. Prime welding 17 and 18 are performed [(6), (7)]. The build-up welds 17 and 18 are also performed from the position (C) of the arc spot weld 15 performed earlier to the position (A) of the tip edge portion 109, and effective by the arc spot welds 15 and 16. We are trying to prevent welding.

  Next, as shown in FIG. 9 (a), from the position of the other circumferential end (E), (F) of the side edge portion 110 to the position of (A), (B) of the tip edge portion 110. Then, overlay welding 19 and 20 is performed [(8), (9)]. Since the corners of the circumferential ends (E) and (F) are not acute, the overlay weldings 19 and 20 are performed without performing the arc spot weldings 15 and 16 as described above.

  Further, as shown in FIG. 9B, in this example, the build-up welding of the side edge portion 110 is performed in the direction opposite to the build-up welding 17 and 18 of the side edge portion 110 described above. Overlay welding 21 and 22 is performed from the positions (A) and (B) toward the circumferential ends (C) and (D), and [(10), (11)], FIG. 9 (c). As shown in FIG. 4, by performing build-up welding 23 and 24 from the positions (A) and (B) of the front edge portion 109 toward the circumferential ends (E) and (F), [(12) (13)], the welding distortion caused by the previous overlay welding 17 to 20 is removed.

  Further, as shown in FIG. 9 (c), on both sides of the cutting blade 105, hardened welds are formed on the portions where the first to third slip-through preventing buildup welds 111, 112, 113 are formed. Overlay welding 25, 26, 27 is performed with the material [(14)].

  Thereafter, after the build-up welding 14, 17, 22, 23, 24, 25, 26, 27 shown in FIG. 9C is completed, grinding or the like is performed by a machine tool (not shown), so that FIG. As shown in FIG. 5, the edge portions 109 and 110 and the slip-through prevention build-up welded portions 111, 112, and 113 are finished as the cutting blade 105 formed.

  However, in the above-described embodiment, the present invention has been described by taking the split cutting blade 105 as an example as shown in FIG. 6, but instead, this may be applied to the integrated cutting blade 35 as shown in FIG. 10. Can do. The fixed portion 125 of the integrated cutting blade 35 is fixedly attached to the rotary shaft 101 or 102.

  And in the slip-through prevention overlay welding part of the said embodiment, although it formed in the side surface of the cutting blade 105 by the position, magnitude | size, range, and number shown in FIG. 1, other positions, magnitude | sizes, ranges, and numbers May be formed on the side surface of the cutting blade 105.

  Moreover, in the said embodiment, as shown in FIG. 1, although the 1st-3rd slip-through prevention build-up welding parts 111-113 were formed spaced apart from the spacer contact part 114, it replaces with this, Any or all of the first through third slip-through preventing build-up welds 111 to 113 may be formed so as to be coupled to the spacer contact part 114.

  As described above, the regenerated cutting blade and shearing crusher according to the present invention can be efficiently regenerated with reduced costs and labor for regenerating the cutting blade, and are attached to the shearing crusher. When used, it has an excellent effect of bringing the crushing efficiency of the shearing crusher closer to a new cutting blade, and is suitable for application to such a regenerated cutting blade and shearing crusher.

10, 11 Chamfering 12, 13 Arc spot welding 14 Overlay welding 15, 16 Arc spot welding 17-24 Overlay welding 25, 26, 27 Overlay prevention overlay welding 35 Integrated cutting blade 100 Shear type crusher 101, 102 Rotation Shaft 103 Rotating blade 104 Spacer 105 Cutting blade 106 Blade base portion 107 Engagement step portion 108 Engagement protrusion 109 End edge portion 110 Side edge portion 111 First slip prevention build-up weld portion 112 Second slip prevention build-up weld portion 113 First 3 Slip-off build-up welded portion 114 Spacer contact portion 120 Object to be crushed 125 Fixed portion 126 Bolt insertion hole 127 Blade edge portion 127a Scuff surface M Worn portion R Rotating direction S1, S2 Gap T Overlapping range W1, W2 Blade width

Claims (6)

A fixing portion and a blade edge portion protruding radially outward from the fixing portion;
The blade edge portion has a tip edge portion sharpened in the rotation direction,
It has a side edge part on the side outer edge part including the blade edge part,
The tip edge portion and the side edge portion are formed by being reprocessed by overlay welding,
The side surface is formed with one or two or more regeneration weld build-up welded welded portions extending from the side edge portion toward the center side of the rotation or toward the center direction. Cutting blade.   The regenerated cutting blade according to claim 1, wherein the slip-through prevention build-up welded portion is formed so as to pass through a side surface of the cutting edge portion.   The regenerated cutting blade according to claim 1 or 2, wherein a blade width of the regenerated cutting blade in the slip-preventing build-up weld is substantially the same as a blade width of a new cutting blade. A side surface of the regenerated cutting blade has a spacer abutting portion that abuts the regenerated cutting blade to a spacer that positions the rotation center in the axial direction.
The regenerated cutting blade according to any one of claims 1 to 3, wherein the slip-through preventing build-up welded portion is formed at a distance from the spacer contact portion. The regenerated cutting blade according to any one of claims 1 to 4 includes a rotary blade that is detachably attached to the blade base portion, and the rotary blade is attached to each of the first and second rotary shafts. Two or more are provided,
A spacer is provided on each of the first and second rotary shafts so as to sandwich the rotary blade from both sides,
A shear-type crusher characterized by shearing and crushing an object to be crushed between a first rotary blade provided on the first rotary shaft and a second rotary blade provided on the second rotary shaft.   When the object to be crushed is sheared and crushed between the rotating first rotating blade and the second rotating blade, the build-up welding of the first cutting blade regenerated by the first rotating blade is provided. The slip-preventing build-up welds are formed so that the parts and the slip-preventing build-up welds of the regenerated second cutting blade included in the second rotary blade are in a state of facing each other. The shear type crusher according to claim 5, wherein the shear type crusher is provided.

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