JPH11290709A - Chip crusher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase cutting efficiency with a simple constitution by providing a catching part at a rotating direction side of a cutting part, constituting a peripheral part of the rotating direction side with three peripheral parts of a tip peripheral part and the first and second side edges, and forming a cutting edge over an entire length at the tip peripheral part and in a part each of the first and second side edges respectively. SOLUTION: The catching part 36 catching swarf by rotation and sending the swarf to the rotating direction is provided at a rotating direction side of a cutting part 34 of a rotary cutting tool 32. And the peripheral part of the rotating direction side of the cutting part 34 is constituted with the tip peripheral part 36a almost parallel to an axial center of a rotary shaft 16 and two side edges 36b and 36c continuing respectively to edge parts 38b and 38c of the tip peripheral part 36a and leading to a base edge of the cutting part 34. The cutting edge 39 is formed respectively over the entire length at the tip peripheral part 36a and over the prescribed length from the edge parts 38b and 38c at the side edges 36b and 36c. The prescribed length is 3 mm, for example. The side edges 36b and 36c are orthogonal here to the rotary shaft 16. The thickness of the cutting part 34 is 24 mm, for example.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chip crusher, and more particularly, to a chip crusher having a large amount of chips processed per unit time.

[0002]

2. Description of the Related Art A relatively long chip generated by cutting in a machining factory is often cut by a chip crusher into chips having a predetermined size or less for convenience of gas transportation and transportation. Hereinafter, a conventional chip crusher will be described with reference to the drawings by way of example. FIGS. 5A and 5B are a perspective view and a plan view, respectively, of an example of a conventional chip crusher. In FIG. 5B, for simplicity, a support described later is omitted. FIGS. 6A and 6B are diagrams each showing the configuration of the chip crusher 30, and are respectively a plan view and a side view taken along the line II. In FIG. 6 (a), a part of the support is shown in FIG.
It is drawn with a dashed line. FIG. 7 is a rear view taken along line II-II. The conventional chip crusher 10 has a disk shape, and a protruding cutting portion 12 having a cutting edge is formed on a peripheral portion, and a plurality of pieces are separated from each other at predetermined intervals in parallel with each other.
For example, a male body 18 having eight rotary cutting tools 14 arranged thereon and a rotary shaft 16 (see FIG. 7) for rotating the rotary cutting tools 14 is provided. Further, the chip crusher 10 includes a motor 19 for rotating the male body 18 via the rotation shaft 16. Furthermore, the tip crusher 10
Has a female mold part 20 having a shape corresponding to the rotary cutting tool 14 and the rotary shaft 16 and supporting a chip as a supplied cutting object from below. In addition, the chip crusher 10 includes a support 23 having a support surface that supports at least the chips on the male body from the lateral direction. Of the support 23, a main support surface 24 formed on the female mold portion substantially in parallel with the rotation shaft 16 forms an angle θ ′ of, for example, 30 ° with respect to the vertical direction. In the present specification, the angle between the main support surface and the vertical direction is defined as the angle rotated from the vertical direction toward the male body 18 on the female body, and the angle from the vertical direction on the female body to the male body 18. The angle rotated toward the opposite direction is defined as positive.

FIG. 8 is a conceptual diagram showing the arrangement of the rotary cutting tools 14 as viewed from the front (in the direction of arrows III-III). Each rotary cutting tool is shown in FIG.
As shown in (a), the rotary cutting tools are arranged at slightly different angles from adjacent rotary cutting tools. A second rotary cutting tool 25 that is rotated by the rotary shaft 16 is provided between adjacent rotary cutting tools. The second rotary cutting tool 25 has a cutting edge 26 (see FIGS. 6B and 7).

In order to cut long chips using the chip crusher 10, long chips are supplied on the female body and the male body, and the male body 18 is rotated in the rotation direction U.
The cutting part 12 rotates the female shape part 20 from top to bottom, thereby cutting chips on the female shape part.

[0005]

By the way, when chips are cut by a conventional chip crusher, the chips escape upward along the main support surface, resulting in poor cutting efficiency, that is, the amount of chip processed per unit time. Was low.
In view of the above circumstances, an object of the present invention is to provide a chip crusher with a simple configuration and high cutting efficiency.

[0006]

SUMMARY OF THE INVENTION The inventor of the present invention has proposed that the periphery of the cutting portion on the rotation direction side extends to the base end of the cutting portion continuously at both ends of the front end periphery forming the periphery of the front end and both ends of the front end periphery. And two side edges, 2
Attention was paid to the fact that a cutting edge is formed only on one of the two side edges or the peripheral edge of the tip. Then, it was studied to improve the cutting efficiency by forming cutting edges on both the peripheral edge of the front end and the two side edges. Further, various experiments and examinations were repeated, such as changing the angle formed by the main support surface with respect to the vertical direction, and the present invention was completed.

[0007] To achieve the above object, a tip crusher according to the present invention is a disk-shaped cutting tool, having a cutting portion that is convex outward from a peripheral edge in a radial direction,
A male body having a plurality of rotary cutting tools arranged in parallel at predetermined intervals, a rotating shaft for rotating the rotary cutting tool, and a female shape portion having a shape corresponding to the male body Having a female body provided along the male body and supporting the chip, which is the object to be cut, from below, in a direction in which the cutting portion passes the female shape portion from top to bottom. A chip crusher that rotates a male body to cut chips by interaction of a rotary cutting tool and a female shape portion into chips having a size of a predetermined length or less, wherein the cutting portion is a chip. On the rotation side of the cutting part, and the periphery of the cutting part on the rotation direction side is continuous with both ends of the tip periphery forming the periphery of the tip and both ends of the tip periphery. First and second to the base end of the cutting part Consists of three perimeter of the edge, the tip periphery over the entire periphery, first, at least a portion each of the second side edge, is characterized in that both cutting edges are formed.

[0008] The predetermined length of the cut swarf is determined according to the processing situation in gas transportation and transportation. The predetermined spacing between the rotary cutting tools is determined in accordance with the predetermined length of the cut chips. The cutting edge described in the present specification does not need to have a sharp shape like a cutting tool, and the chips located between the rotary cutting tool and the female shape portion may have the female shape portion of the rotary cutting tool. Any blade that can be cut by passing from above to below may be used. Preferably, the tip crusher according to the present invention includes a support having a main support surface that is substantially parallel to the rotation axis and supports the chips on the female body from the lateral direction, and the main support surface is at least separated from the female body. An angle within a range of -20 ° to 10 ° with respect to the vertical direction is formed up to a height position of 5 cm above. If the angle is smaller than -20 °, the chips are not easily escaped excessively, and the rotational force required to rotate the rotating shaft is increased. If the angle is larger than 10 °, the chips are likely to escape upward. The angle is determined in this range in consideration of various parameters such as the material of the chip and the rotation speed of the rotary cutting tool.

[0009]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Embodiment Example The embodiment is an embodiment of the present invention. FIG.
(A) and (b) are the perspective view and the top view of the chip crusher of this embodiment example, respectively. The tip crusher 30 of this embodiment is different from the conventional tip crusher 10.
, The rotary cutting tool 3 instead of the rotary cutting tool 14
2 comprising a male body 33 having
, A support 40 is provided. In the present embodiment,
The same components as those in the related art are denoted by the same reference numerals, and description thereof is omitted.

FIGS. 2A and 2B show a rotary cutting tool 3 attached to a chip crusher 30.
FIG. 2 (a) is a front view, FIG.
(B) is a plan view. On the rotation direction side of the cutting portion 34 of the rotary cutting tool 32, a hook portion 36 that hooks chips by rotation and feeds the chips in the rotation direction is provided. The peripheral edge of the cutting portion 34 on the rotation direction side is continuously connected to the distal end edge 36a substantially parallel to the axis of the rotating shaft 16 and the end portions 38b and 38c of the distal end edge.
And two side edges 36b and 36c extending to the base end.
A cutting edge 39 is formed over the entire length at the distal end peripheral edge 36a, and over a predetermined length from the end portions 38b, c at the side edges 36b, c. The predetermined length is, for example, 3 mm. The side edges 36b and 36c are orthogonal to the rotation shaft 16 in this embodiment. The thickness t of the cutting portion 34 is, for example, 2
4 mm. The length from the rotation center of the rotary cutting tool 32 to the tip of the cutting portion 34, that is, the turning radius r of the rotary cutting tool 32 is, for example, 75 mm.

FIG. 3 is a rear view showing the configuration of the chip crusher 30 as viewed from the direction of arrows IV-IV in FIG.
The support body 40 is formed on the female mold body substantially in parallel with the rotation axis, and supports the chip on the female mold body from the lateral direction.
And the main support surface 42 is at least 5
An angle θ of −5 ° with respect to the vertical direction is formed up to the height position above cm. 0 ° instead of -5 °, ie the main support surface 42
May be provided in the vertical direction. In addition, the tip crusher 30 causes the male body 33 to be removed when a non-cuttable foreign object is caught between the rotary cutting tool 32 and the female mold portion 20 and a rotational force greater than a predetermined value is applied to the rotary shaft 16. It is controlled to automatically reverse rotation to discharge foreign matter and to automatically continue normal operation.

FIG. 4 shows that in order to cut long chips using the tip crusher 30, long chips are supplied on the female and male bodies and the male body 33 is turned in the rotation direction U. The chips on the female-shaped part are cut by rotating and passing the cutting part 12 from above to below the female-shaped part 20. The material of the chips is, for example, aluminum or iron. The rotary cutting tool 32 is rotated at, for example, 11 rpm. Chips that have been cut and formed to have a predetermined length or less fall downward (V direction). In the present embodiment, the inclination angle θ of the main support surface 42 is reduced as compared with the conventional chip crusher 10, and the chips are prevented from escaping upward due to the rotation of the male body 33. Further, a cutting edge 39 is formed on the tip peripheral edge 36a and the two side edges 36b, c of the rotary cutting tool 32, respectively. Therefore, a chip crusher having a high cutting efficiency of chips, that is, a processing amount per unit time which is much larger than that of the conventional chip crusher is realized. It should be noted that a significant effect was not seen even if a hooking portion was formed on the cutting portion 12 with the conventional chip crusher 10.

[0013]

According to the present invention, the cutting portion has a hook portion on the rotation direction side of the cutting portion for hooking the chips by rotation and sending the chip in the rotation direction, and the periphery of the cutting portion on the rotation direction side is , A peripheral edge substantially parallel to the axis of the rotating shaft, and three peripheral edges of a first side edge and a second side edge respectively leading to the base end of the cutting portion at both ends of the distal end edge. A cutting edge is partially formed. This realizes a chip crusher having a high cutting efficiency with a simple configuration, that is, a high processing amount of chips per unit time.

[Brief description of the drawings]

FIGS. 1A and 1B are a perspective view and a plan view of a chip crusher according to an embodiment, respectively.

FIGS. 2 (a) and 2 (b) are diagrams showing the configuration of a rotary cutting tool attached to a chip crusher. FIG. 2 (a) is a front view, and FIG. ) Is a plan view.

FIG. 3 is a rear view showing the configuration of the chip crusher as viewed from the direction of arrows IV-IV.

FIG. 4 is a schematic cross-sectional view taken along a line VV, showing a state in which chips are cut using a chip crusher.

FIGS. 5 (a) and 5 (b) are a perspective view and a plan view, respectively, of an example of a conventional chip crusher.

6 (a) and 6 (b) are diagrams each showing a configuration of a conventional chip crusher, and are respectively a plan view,
And it is a side view of arrow II. 6A of FIG.
Corresponds to 〜 in FIG.

FIG. 7 is a diagram showing a configuration of a conventional chip crusher, and is a rear view taken along line II-II.

FIG. 8 is a conceptual diagram showing an arrangement state of each rotary cutting tool as viewed from the front (viewed along the line III-III).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Chip crusher 12 Cutting part 14 Rotary cutting tool 16 Rotary shaft 18 Male body 19 Motor 20 Female shape part 22 Female body 23 Supporter 24 Main support surface 25 Second rotary cutting tool 26 Edge blade 30 Chip crusher Reference Signs List 32 rotary cutting tool 33 male body 34 cutting part 36 hook part 36a tip peripheral edge 36b, c side edge 38b, c end part 39 cutting edge 40 support body 42 main support surface

Claims (2)

[Claims] 1. A rotary cutting tool having a disk-shaped cutting tool, having a cutting portion protruding radially outward from a peripheral edge, and a plurality of rotating cutting tools arranged at predetermined intervals in parallel with each other. And a male body having a rotating shaft for rotating the rotary cutting tool, and a female body having a female shape portion corresponding to the male body, provided along the male body, and a cutting body A female body that supports the debris from below, and rotates the male body in a direction in which the cutting portion passes the female shape part from top to bottom, so that the rotary cutting tool and the female mold part can be connected to each other. A chip crusher that cuts chips by action to form chips having a length of a predetermined length or less, wherein the cutting portion has a hook portion on the rotation direction side of the cutting portion that hooks the chip and sends the chip in the rotation direction. , And the periphery of the cutting part on the rotation direction side is It is composed of three peripheral edges, a first peripheral edge forming an edge, and first and second side edges each of which is continuous with both ends of the distal edge and reaches the base end of the cutting portion. A chip crusher, characterized in that at least a part of each of the first and second side edges has a cutting edge. 2. A support having a main support surface substantially parallel to the axis of rotation and for supporting chips on the female body from a lateral direction, wherein the main support surface is at least 5 cm above the female body. 2. The chip crusher according to claim 1, wherein the angle between the vertical direction and the vertical direction of the main support surface is within a range of -20 ° to 10 °. The angle rotated from the vertical direction toward the male body is defined as negative, and the angle rotated from the vertical direction toward the male body is defined as positive.)