JPH08290074A - Structure of cutting part in chip crusher - Google Patents

Abstract

PURPOSE: To simplify the constitution of the whole structure and to make a cutting piece small and also to reduce cutting load by forming a rotary cutting edge into a projecting shape provided with cutting edges on the face of a tip and the end faces of both sides, and forming a stationary cutting edge into a recessed shape provided with cutting edges on three faces of the end face of a base and the end face of the inside. CONSTITUTION: A liner 3 is keyed at a fixed interval on an axis 1 of rotation which is fitted to the body 10 and positively rotated by a driving source. The liner 3 is provided with cutting edge bases 2 having rectangular fitting faces 2A in the interval of 90 degrees. Rotary cutting edges 5 are detachably fitted to the cutting edge bases 2. On one side, the rotary cutting edges 5 and a stationary cutting edge 6 performing shearing action are detachably fitted to a stationary cutting edge base 7 provided to the body 10. The stationary cutting edge base 7 is provided with a recess-shaped notch 8, so that the rotary cutting edges 5 do not interfere. A base cutting edge 9A and a side cutting edge 9B are fitted to the fitting face in a recessed shape and the top faces are positioned on the same plane as the center of the axis 1 of rotation. In the base cutting edge 9A, the cutting edge is formed in the end face of the base. In the side cutting edge 9B, the cutting edge is formed in the end face of the inside.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a cutting portion in a chip crusher for finely cutting chips generated during metal working of machine tools.

[0002]

2. Description of the Related Art An outline of the structure of a chip crusher is as follows: a hopper part for feeding (transporting) chips, a cutting part connected to a lower end of a tapered hopper and a crushed chip It consists of a discharge part for sending to.

The cutting portion connected to the lower end opening of the hopper portion is provided with a pair of rotary blades with their rotating shafts arranged in parallel so as to face each other, and is rotated in the direction of the rotary blades facing each other. It is configured to cut while entraining the powder. Further, the blades to be cut are blades formed on two side surfaces of an uneven surface having a comb tooth-like uneven surface, and the blades are rotated relative to each other so that one concave portion and the other convex portion are cutably engaged.

[0004]

In the conventional cutting section, the rotary axes of the blades are on the respective blades, and the blades have a total of two axes. Therefore, the adjustment of mutual rotation timing and the complication of the structure of the interlocking mechanism are complicated. Is hard to avoid.

Further, since the cutting portion of the blade has two sides, there is a limit to the size of the cutting piece, and it becomes mechanical because it is not compatible with the conveyance using air for the conveyance after cutting.
The whole set of devices becomes a big one.

Therefore, an object of the present invention is to provide a cutting portion that simplifies the overall structure, makes the cutting piece as small as possible, and reduces the cutting load and surely cuts.

[0007]

SUMMARY OF THE INVENTION The present invention comprises a rotary blade and a fixed blade, the rotary blade having a convex shape with blades on the tip surface and both end surfaces with respect to the rotary shaft, and the side end surface blades of the rotary shaft. Formed on the centrifugal line, the tip blade was formed parallel to the rotation axis, and the fixed blade was concave with blades on the three faces of the base end face and the inner end face on the same plane as the center of the rotation shaft, corresponding to the rotation blade. It is characterized by that. Further, the fixed blade may be provided with a three-sided blade having a gradient in the longitudinal direction, and a guide roller having a guide protrusion on the obliquely upper fixed blade side of the rotary blade should not interfere with the rotary blade. It may be provided.

[0008]

[Operation] When the rotary blade rotates, it cuts the chips by the shearing action with the fixed blade, and the three-sided blade forming the convex shape of the rotary blade and the three-sided blade forming the concave shape of the fixed blade provide fine shearing action. To play.

The three-sided blade of the rotary blade is formed on the centrifugal line of the rotary shaft and parallel to the rotary shaft, and the three-sided blade of the fixed blade is formed on the same plane as the center of the rotary shaft. It becomes a shearing action.

Further, since the three-sided blades of the fixed blade are provided with a gradient in the lengthwise direction, the three-sided blades are not sheared at once on the entire surface, but are sequentially partially sheared according to the gradient. It has the effect of reducing the shear load.

Further, the rotary roller having the guide protrusion provided on the side of the fixed blade obliquely above the rotary blade has a function of guiding the inclusion of cutting chips in the rotary blade and promotes efficient cutting. is there.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a rotary shaft provided on the main body 10, which is positively rotated by a drive source (not shown). The turrets 2, 2, 2, 2 having rectangular mounting surfaces 2A at intervals of 90 degrees on the rotary shaft 1
, Which are fixed to the tool rests 2, and rotary blades 5, 5, 5, 5 are detachably attached to the tool rests 2, 2, 2, 2.

The rotary blade 5 attached to the tool rest 2 forms a convex surface with respect to the rotary shaft 1 to form blades on the front end surface and both side end surfaces, and both side end surface blades 5B and 5B are centrifugal shafts of the rotary shaft 1. It is located on the line a, and the tip surface blade 5A is located parallel to the rotary shaft 1.

On the other hand, the rotary blade 5 and the fixed blade 6 which performs a shearing action.
Is detachably attached to the fixed tool rest 7 installed in the main body 10. The fixed tool rest 7 is provided with concave notches 8 so that the rotary blades 5 do not interfere with each other, and the mounting surface 7A has a base blade 9A having a blade 6A formed on the base end surface and blades 6B, 6 on the inner end surface.
The side surface blades 9B, 9B having the B formed thereon can be attached in a concave shape, and the upper surface is located on the same plane as the center of the rotating shaft 1.

The rotary blade 5 is individually attached to each tool rest 2, and the fixed blade 6 is a base blade 9A and a pair of side blades 9B, 9B.
Since they are attached to the fixed turrets 7, they can be easily replaced and repaired, and the structure is simple.

Reference numeral 11 denotes a guide roller, which is located on the obliquely upper fixed blade 6 side of the rotary blade 5, positively rotates, and is installed so as not to interfere with the rotary blade 5. Guide roller 1
The peripheral surface of No. 1 has guide protrusions 12 so that the chips falling from the upper hopper 13 can be smoothly transferred to the cutting portion.

FIG. 3 shows another embodiment, in which the base blade 9A and the side blades 9B, 9B of the fixed blade 6 are formed with gradients 9C, 9C, 9C in the longitudinal direction, respectively. We are trying to reduce it. Also, as shown in FIG.
The cutting load can be reduced by changing the mounting angle of the rotary blade 5 when mounting the liners 3, ... Mounted at regular intervals on the rotary shaft 1.

[0018]

INDUSTRIAL APPLICABILITY As described above, the present invention has the effect of simplifying the structure and reducing the shear load by performing shearing with only one rotating shaft.

Further, since the blades are formed on the three surfaces of the rotary blade and the fixed blade, the chips can be cut at three surfaces, which makes it possible to cut finer than the conventional two locations, and the transportation of the chips after cutting is easy. It has the effect of becoming.

Furthermore, since the blades on the three sides of the fixed blade are provided with a gradient in the lengthwise direction, shearing with the rotary blade is gradually performed, and it is possible to avoid a temporary occurrence, thus reducing the shearing load. Can be obtained.

The guide roller provided on the side of the fixed blade obliquely above the rotary blade positively acts on the cutting blade for shearing in cooperation with the rotation of the rotary blade due to the action of the guide protrusion due to the rotation. It has the effect of promoting

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of an essential part showing an embodiment of the present invention.

FIG. 2 is a cross-sectional plan view of essential parts showing an embodiment of the present invention.

FIG. 3 is a partially longitudinal front view showing another embodiment of the present invention.

[Explanation of symbols]

 1 rotary shaft 2 turret 3 liner 4 key stop 5 rotary blade 5A tip face 5B side end face 6 fixed blade 6A base end face 6B inner end face 7 fixed turret 8 notch 9A base blade 9B side face blade 10 main body 11 guide roller 12 guide protrusion 13 hopper

Claims (3)

[Claims] 1. A rotary blade and a fixed blade, wherein the rotary blade has a convex shape with blades on the front end surface and both end surfaces with respect to the rotary shaft, and the side end surface blade is formed on the centrifugal line of the rotary shaft. The face blade is formed parallel to the rotation axis, and the fixed blade is a concave shape having a blade on three surfaces of the base end face and the inner end face on the same plane as the center of the rotation shaft, corresponding to the rotation blade. The structure of the cutting part in the crusher. 2. The structure of the cutting portion in the chip crusher according to claim 1, wherein the three blades of the fixed blade are provided with a gradient in the length direction. 3. The cutting part in the chip crusher according to claim 1, wherein a guide roller having a guide protrusion is provided on the side of the fixed blade obliquely above the rotary blade so as not to interfere with the rotary blade. Structure.