JP2961069B2 - Structure of cutting part in chip crusher - Google Patents

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 part in a chip crusher for finely cutting chips generated during metal working of a machine tool.

[0002]

2. Description of the Related Art The configuration of a swarf crusher is roughly summarized as follows: a hopper for feeding (conveying) swarf, a cutting part connected to a lower end of a hopper tapered, and a crushed swarf in a next processing step It consists of a discharge section for sending to

The cutting section connected to the lower end of the hopper section is provided with a pair of rotary blades arranged in parallel to each other with rotating shafts in parallel, and rotated in the direction of the rotating blades facing each other. It is configured to cut while entraining the powder. The blades to be cut have blades formed on two side surfaces of the irregular surface having irregularities in a comb shape, and are rotated so that one convex portion is cutably engaged with one concave portion.

[0004]

In the conventional cutting section, the rotation axes of the blades are provided on each blade, and the blades are combined into two axes. Therefore, the configuration of the mutual adjustment of the rotation timing and the interlocking mechanism is complicated. Is difficult to avoid.

[0005] Further, since the cutting portion of the blade has two surfaces, the size of the cut piece is limited, and it is mechanical because it cannot be conveyed using air for conveyance after cutting.
A series of devices would be large-scale.

SUMMARY OF THE INVENTION It is an object of the present invention to simplify the overall structure, to reduce the size of cut pieces as much as possible, and to provide a cut portion capable of reducing the cutting load and reliably cutting.

[0007]

SUMMARY OF THE INVENTION The present invention comprises a rotary blade and a fixed blade, wherein the rotary blade has a convex shape having blades on a front end surface and both end surfaces with respect to a rotary shaft, and the side end surface blade has a rotary shaft. The tip blade is formed parallel to the rotation axis, the fixed blade is formed in a concave groove shape corresponding to the ridge of the rotary blade, and the blade has three blades on the inner surface of the base and both inner surfaces. The blade is formed on the same plane as the center line of the rotating shaft. Further, the fixed blade may be provided with a three-sided blade having a vertical gradient in the blade span direction. Further, a chip transfer guide roller having a guide protrusion on the fixed blade side obliquely above the rotary blade does not interfere with the rotary blade. It may be provided as follows.

[0008]

When the rotary blade rotates, the chips are cut by the shearing action of the fixed blade, and finely sheared by the three surfaces forming the convex shape of the rotary blade and the three surfaces forming the groove of the fixed blade. It works.

The three blades of the rotary blade are formed on the normal line of the rotary shaft and parallel to the rotary shaft, and the three blades of the fixed blade are formed on the same plane as the center line of the rotary shaft. Is the shearing effect of

In addition, since the three blades of the fixed blade are provided with a vertical gradient in the cutting direction, the three blades are partially sheared sequentially according to the vertical gradient without shearing the entire surface at once. The effect of reducing the shear load is exhibited.

Further, a chip transfer guide roller having a guide projection provided on the fixed blade obliquely above the rotary blade acts to transfer and guide the incorporation of the chip into the rotary blade, thereby promoting efficient cutting. It is to let.

[0012]

An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a rotating shaft provided on the main body 10, which is positively rotated by a driving source (not shown). A tool post 2, 2, 2, 2 having a rectangular mounting surface 2A at 90-degree intervals on a rotating shaft 1.
Are keyed at regular intervals, 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 has a convex surface with respect to the rotary shaft 1 to form blades at the tip end surface and both side end surfaces. The tip blade 5A is located on the line a and is parallel to the rotation axis 1.

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

The rotary blade 5 is independently mounted on each of the tool rests 2, and the fixed blade 6 has a base inner blade 9A and a pair of inner side blades 9B.
Since 9B is attached to each of the fixed tool rests 7, replacement and repair can be easily performed, and the configuration is simple.

Numeral 11 denotes a chip transfer guide roller, which is positioned obliquely above the rotary blade 5 and on the fixed blade 6 side, and is installed so as to rotate positively and not to interfere with the rotary blade 5. Guide protrusions 12 are provided on the peripheral surface of the chip transfer guide roller 11 so that chips falling from the upper hopper 13 can be smoothly transferred to the cutting portion.

FIG. 3 shows another embodiment, in which the base inner blade 9A and the inner side blades 9B, 9B of the fixed blade 6 are formed with vertical gradients 9C, 9C, 9C in the cutting direction, respectively.
The cutting load is reduced. Also, as shown in FIG. 2, the rotary shaft 1 of the liners 3 with the rotary blades 5 attached at 90-degree intervals.
By changing the mounting angle of the rotary blade 5 in mounting the blade, the cutting load can be reduced.

[0018]

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.

In addition, since the blades are formed on the three surfaces of the rotary blade and the fixed blade, the chips can be cut at three places, and can be cut finer than the conventional two places, and the chip can be easily transported after cutting. It has the following effects.

Furthermore, since the three blades of the fixed blades are provided with a vertical gradient in the direction of blade cutting, the shearing with the rotary blade is gradually performed, and it is possible to avoid a temporary condition, thereby reducing the shear load. You can get

The chip transfer guide roller provided on the fixed blade side obliquely above the rotary blade positively engages with the rotation of the rotary blade due to the rotation of the rotary blade by the action of the guide projection. It has the effect of promoting it.

[Brief description of the drawings]

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

FIG. 2 is a cross-sectional plan view of a main part showing one embodiment of the present invention.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotary axis 2 Turret 3 Liner 4 Key stop 5 Rotating blade 5A Tip surface 5B Side end surface 6 Fixed blade 6A Base inner surface 6B Inner surface 7 Fixed turret 8 Notch 9A Base inner blade 9B Inner surface blade 10 Main body 11 Cutting powder transfer guide Roller 12 Guide protrusion 13 Hopper

Claims (3)

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