JP4512226B2 - Cutting processing device - Google Patents

Description

BACKGROUND OF THE INVENTION
[0001]
The present invention relates to a cutting processing apparatus that performs cutting processing on metal scraps and the like that are to be cut in various factories.
[0002]
[Prior art]
As the conventional cutting processing device, for example, according to Japanese Utility Model Publication No. 5-43861, a disk-shaped cutter portion having a plurality of blade portions at equal intervals on the outer periphery and a diameter smaller than a blade bottom circle of the blade portion. A pair of cutter units, in which collar portions slightly thicker than the cutter thickness are alternately attached to the rotation axis, mesh so that the cutter portions of both cutter units are alternately positioned, and one cutter portion Attach so that there is no gap between the cutting edge circle of the blade and the other collar, and rotate the rotating shafts of both cutter units in the opposite direction to each other. There is known a cutting processing apparatus that holds, cuts, and discharges between both cutter units.
[0003]
[Problems to be solved by the invention]
In the above-described conventional cutting processing apparatus, for example, when elongated metal waste is put between both cutter units in a posture substantially parallel to the rotation axis, the metal waste is sheared by the blade portions of both cutter units, and the cutter portion It is cut to a length of about the plate thickness and discharged. However, when the slender metal scrap is gripped by the blade from the end in a posture perpendicular to both rotation axes, it is sandwiched between the tip of the blade and the collar and discharged without being cut finely. Arise.
[0004]
In addition, as described in Japanese Utility Model Publication No. 5-32194, by arranging two pairs of cutter units vertically, an object to be cut that has not been finely cut by the first-stage cutter unit is removed from the second-stage cutter. Although it is conceivable to cut again by the unit, if a pair of cutter units is further provided in this way, the number of parts is greatly increased and the cost is increased, and the cutting processing apparatus is enlarged.
[0005]
Then, this invention makes it a subject to provide the cutting processing apparatus which can cut | disconnect a to-be-cut object finely and discharge | emit it, without adding a cutter unit further in view of said problem.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a disk-shaped cutter portion having a plurality of blade portions at equal intervals on the outer periphery and a diameter smaller than the blade bottom circle of the blade portion and slightly larger than the thickness of the cutter. Engage a pair of cutter units with thick collars alternately attached to the rotating shaft so that the cutters of both cutter units are alternately positioned, and the cutting edge circle of one cutter and the other collar Attach so that there is almost no gap between the two parts, and rotate the rotating shafts of both cutter units in opposite directions to hold the workpiece to be cut between the two cutter units. In a cutting processing apparatus that cuts and discharges between both cutter units, a collar portion that is inserted between the cutter portions of each cutter unit from the discharge side of the workpiece and is positioned between the cutter portions A fixing jig is provided that is close to the cutting edge circle of the cutter portion of the other cutter unit facing the collar portion without any gap and forms a substantially closed space between the collar portion and the cutting edge circle. Features. Here, “almost” of the above expression “attaching a pair of cutter units so that there is almost no gap between the cutting edge circle of one cutter part and the other collar part” is completely This means that there may be a slight gap between the cutting edge circle of one cutter part and the other collar part. This gap may be caused by wear of the cutting edge of the cutter part, or may be intentionally formed. In short, it suffices that the object to be cut can be pushed or cut by the cutting edge of one cutter part and the other collar part. However, ideally, it is preferable that there is no gap between the cutting edge circle of one cutter part and the other collar part. In addition, the term “almost” in the expression “approaching the collar part positioned between the cutter parts and the cutting edge circle of the cutter part of the other cutter unit facing the collar part almost without a gap” is used. Of course, this means that the fixing jig may be close to the cutting edge of the collar part and the cutter part with a slight gap when there is no gap. In particular, the gap between the fixing jig and the blade edge of the cutter part may be caused by wear of the blade edge of the cutter part, or may be consciously formed. However, ideally, it is preferable that the fixing jig does not have a gap between the cutting edge circle of one cutter part of the collar part and the cutting edge of the cutter part and the other collar part.
[0007]
The object to be cut that is discharged without being cut finely by both cutter units is sandwiched between the tip of the blade portion of one cutter unit and the collar portion of the other cutter unit, and is discharged without applying a shearing force. However, since the fixing jig is close to the collar portion without a gap, the object to be cut that has not been cut finely is blocked by the fixing jig and is not discharged straight, but stays in the space. Since the object to be cut continues to be pushed into the space, the object to be cut in the space moves to the cutter part facing the collar part. Since the blade portion of the cutter portion is constantly moving while facing the space, the cut object is caught by the blade portion that has moved next and is about to be dragged out of the space when entering the cutting edge circle. Since the fixing jig is close to the cutting edge circle without a gap, when being caught by the blade portion and dragged out of the space, an object to be cut is sandwiched between the cutting edge and the fixing jig and a shearing force acts to cut.
[0008]
Note that it is conceivable that a large gap is generated between the fixing jig and the cutter part between the blade part and the blade part, and the workpiece is spilled through the gap without being cut. In that case, an arc-shaped portion extending in the moving direction of the blade portion along the cutting edge circle of the cutter portion is formed on the fixing jig, and the length of the arc-shaped portion is longer than the mutual interval between the blade portions. By doing so, the clearance gap between a blade part and a blade part is obstruct | occluded by an arc-shaped part, and it is prevented that a to-be-cut object spills out.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Referring to FIG. 1, reference numeral 1 denotes a cutting processing apparatus according to the present invention. A pair of rotary shafts 2a and 2b arranged in parallel with each other are rotatably supported in the cutting processing apparatus 1. A V pulley is attached to the right end of the rotary shaft 2a in the drawing and is connected to a drive motor (not shown) via a V belt 22. On the other hand, the left ends of the rotary shafts 2a and 2b in the drawing are connected to each other by a pair of gears (not shown). Accordingly, when one rotating shaft 2a is rotated by the drive motor, the rotational force is transmitted to the other rotating shaft 2b through a pair of gears, and the other rotating shaft 2b is synchronized with the one rotating shaft 2a in the reverse direction. Rotate. A plurality of cutter blocks 3 are attached to the rotary shafts 2a and 2b so as to rotate together with the rotary shafts 2a and 2b. Each cutter block 3 is sandwiched between four cutter plate portions 4 and the cutter plate portion 4, three color portions 30a that are slightly wider than the plate thickness of the cutter plate portion 4, and a color portion 30b that is half the thickness of the color portion 30a. And are formed integrally. Sixteen blade portions are formed on the outer periphery of each cutter plate portion 4, and the blade edge 41 of the blade portion is formed to be inclined 20 degrees with respect to a direction parallel to the rotation axis as shown in FIG. The rake face 42 is formed in an arc shape. Further, the four blade portions are formed so that the phases are shifted by 2.5 degrees in order, and the blade tips 41 are set so as to be spirally arranged with respect to the rotation axis as shown in FIG. . The cutter unit 3 attached to the rotary shaft 2a and the cutter unit 3 attached to the rotary shaft 2b are reversed left and right, and any cutter unit 3 has a rake face when the rotary shafts 2a and 2b rotate. 42 was set to face the rotation direction. The rotating shaft 2a or the rotating shaft 2b and the cutter block 3 constitute a cutter unit.
[0010]
With reference to FIG.3 and FIG.4, in this invention, the fixing jig 5 was installed under the left and right cutter units. The fixing jig 5 is constituted by arranging a pair of jig blocks 5a and 5b side by side along the cutter unit and fastening them together via a jig plate 5c. The jig blocks 5a and 5b are alternately provided with arcuate portions 52 corresponding to the cutting edge circle drawn by the locus of the cutting edge 41 and corner portions 51 corresponding to the collar portions 30a and 30b. The flat portion 53 is connected to the corner portion 51 so that the leading edge of the flat portion 53 coincides with the upper end edge 52 a of the other arcuate portion 52. Then, the fixing jig 5 was attached so that the corner portion 51 was close to the collar portions 30a and 30b without a gap and the arc-shaped portion 52 was close to the cutting edge circle of the blade portion without a gap.
[0011]
Then, as shown in FIG. 4, a substantially triangular space 6 surrounded by the cutting edge circle of one cutter unit, the collar portions 30 a and 30 b of the other cutter unit, and the flat portion 53 of the fixing jig 5 is formed. In the figure, the object to be cut is supplied from above, sheared between the cutter plate portions 4 of both cutter units, and discharged to the space 6. In addition, the to-be-cut object which was pinched between the blade edge | tip 41 and collar part 30a * 30b and was not cut | disconnected finely is similarly discharged | emitted in the space 6. FIG. The object to be cut discharged into the space 6 is pushed out toward the cutter plate portion 4 because the space 6 is closed by the collar portions 30 a and 30 b and the flat portion 53. Then, the object to be cut is sandwiched between the blade edge 41 and the upper edge 52a of the arcuate portion 52 and cut. The length of the arc-shaped portion 2 is set to be longer than the interval between the blade portions, so that the object to be cut in the space 6 does not slip out of the arc-shaped portion 52 before being cut by the blade edge 41 and the upper edge 52a. did.
[0012]
【The invention's effect】
Explaining the effect of a representative one of the present invention, a disc-shaped cutter portion having a plurality of blade portions at equal intervals on the outer periphery and a diameter smaller than the blade bottom circle of the blade portion and the thickness of the cutter A pair of cutter units, each having a slightly thicker collar portion attached alternately to the rotating shaft, mesh so that the cutter portions of both cutter units are alternately positioned, and the cutting edge circle of one cutter portion and the other Attach so that there is no gap between the collar parts of the blades, and rotate the rotating shafts of both cutter units in opposite directions. In a cutting processing apparatus that grips, cuts and discharges between the two cutter units, the cutter is inserted between the cutter parts of each cutter unit from the discharge side of the workpiece and positioned between the cutter parts. A fixing jig is provided that is close to the cutting edge circle of the cutter part of the other cutter unit facing the collar part and with no gap, and forms a substantially closed space between the collar part and the cutting edge circle. Therefore, the object to be cut can be cut finely and discharged without further adding a cutter unit.
[Brief description of the drawings]
FIG. 1 is a plan view showing a configuration of an embodiment of the present invention. FIG. 2 is a partial perspective view showing details of a blade portion. FIG. 3 is a perspective view showing shapes of a cutter unit and a fixing jig. [Figure] Positional relationship between cutter unit and fixture [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cutting processing apparatus 4 Cutter board part 30a Collar part 30b Collar part 5 Fixing jig

Claims (2)

A disc-shaped cutter portion having a plurality of blade portions at equal intervals on the outer periphery and a collar portion having a diameter smaller than the blade bottom circle of the blade portion and slightly thicker than the thickness of the cutter alternate with respect to the rotation axis. The pair of cutter units attached to each other are meshed so that the cutter portions of both cutter units are alternately positioned, and there is no gap between the cutting edge circle of one cutter portion and the other collar portion. By attaching the cutters to each other and rotating the rotating shafts of the cutter units in opposite directions, the workpieces inserted between the cutter units are held and cut by the respective blades and discharged from between the cutter units. A cutting unit that is inserted between the cutter units of each cutter unit from the delivery side of the object to be cut, and the other cutter that is positioned between the cutter units and that faces the collar unit. Substantially without clearance in proximity to the cutting edge circle of the cutter portion of the unit, the cutting processing apparatus characterized in that a fixture to form a substantially enclosed space between the collar portion and the cutting edge circle. The fixing jig has an arc-shaped portion extending in the moving direction of the blade portion along the cutting edge circle of the cutter portion, and the length of the arc-shaped portion is longer than the mutual interval between the blade portions. The cutting processing apparatus according to claim 1.

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