CN203316828U - Novel shearing tool - Google Patents

Abstract

The utility model relates to a novel shearing tool, include blade holder (2) and be tool bit (1) that the echelonment is fixed in blade holder (2), tool bit (1) is rectangular type, and the cutting part of tool bit (1) is the straight edge sword, blade angle theta₁=90 °, height H of the cutting edge of the straight edge₁Is 1/5-3/5 of the height H of the cutter head , and the tip of the cutting edge is rounded. The utility model improves the edge part of the cutter head, improves the strength of the edge part, increases the impact resistance of the cutter, improves the stress condition of the cutter head, and prevents the cutter head from tipping; in addition, the width of the outermost cutter head in the cutter heads arranged in a step shape is widened, so that the falling space of the shearing short section in shearing is enlarged, and the problem of cutter material clamping is solved. Through the improvement, the shearing of the spent fuel is safer, and the service life and the function meet the shearing requirement.

Description

A new type of shearing tool

technical field

The utility model belongs to the technical field of mechanical knives, in particular to a novel shearing knives.

Background technique

During the reprocessing of spent fuel, it is necessary to use a shearing tool to cut the spent fuel assembly before performing other treatments. Usually, shearing tools include a tool seat and a cutter head installed in the tool seat. The existing shear test results show that the cutting edge is prone to continuous chipping, and there is a phenomenon of material clamping at the outermost cutter head of the tool, which seriously affects the quality of the tool. life of the head.

Utility model content

Aiming at the defects existing in the prior art, the purpose of this utility model is to provide a new type of shearing tool, which can improve the stress on the cutter head, prevent chipping, effectively improve the service life of the tool, and solve the problem of tool clamping. material problem.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a new type of shearing tool, including a knife seat and a plurality of knife heads arranged in the knife seat in a stepped shape. The part is a straight-edged edge, the cutting edge angle θ ₁ =90°, the height H ₁ of the straight-edged edge is 1/5-3/5 of the height H of the cutter head, and the tip of the cutting edge is rounded.

Further, the blade angle α of the cutter head is 150-179 degrees.

Further, among the plurality of cutter heads arranged in a step shape in the cutter seat, the width L' of the outermost cutter head is about 1.2-2 times the width L of the other cutter heads.

The utility model improves the blade portion of the cutter head, improves the strength of the blade portion, increases the impact resistance of the cutter head, improves the stress condition of the cutter head, and prevents the blade from chipping; The width of the outermost cutter head in the head is widened, thereby increasing the falling space of the short section during cutting, and solving the problem of tool clamping. Through the above improvements, the shearing of spent fuel is safer, and the life and function meet the requirements of shearing.

Description of drawings

Fig. 1 is the structural representation of a kind of novel shear cutter provided by the utility model;

Fig. 2 is a sectional view along A-A direction in Fig. 1;

Fig. 3 is a schematic structural view of a single cutter head in Fig. 1;

Fig. 4 is the structural representation of original shear cutter;

Fig. 5 is a sectional view along B-B direction in Fig. 4;

Fig. 6 is a schematic structural diagram of a single cutter head in Fig. 4 .

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

In order to clearly describe the improvements of the present invention, the following first briefly describes the shearing cutters commonly used for shearing spent fuel assemblies and the cutter heads provided in the cutter holders of the cutters.

As shown in Fig. 4, generally, the shearing cutter used for shearing the spent fuel assembly includes a cutter seat 2 and a plurality of cutter heads 1 arranged in the cutter seat 2 in a stepped shape, and the cutter heads 1 are fixed on the cutter head by bolts 3 In the seat 2, it can move and cut together with the knife seat 2; and, the cutter heads 1 in the knife seat 2 all adopt the same width. As can be seen from Figures 5 and 6, in the original shearing tool, the cutter head 1 is elongated, and the straight edge of the blade is relatively short. The angle α' is smaller, resulting in a sharper tip.

The improvement of the utility model is:

First, as shown in Figure 3, the height _H 1 of the straight edge (cutting edge angle θ ₁ =90°) of the cutter head 1 is increased. After the improvement, the height H ₁ of the straight edge is the 1/5-3/5 of the height H, and the tip of the cutting edge is rounded. After the height of the straight-edge blade is increased, preferably, the blade angle α of the cutter head 1 is 150-179 degrees.

Second, as shown in Figure 1, among the plurality of cutter heads 1 arranged in the cutter seat 2 in a stepped shape, the width L' of the outermost cutter head 1-1 is about 1.2-2 times the width L of other cutter heads .

The utility model increases the height H ₁ of the straight edge on the upper part of the cutter head 1, increases the size of the original rake angle α', and rounds the edge of the cutter head 1, so that the strength of the blade can be effectively improved to prevent chipping phenomenon, improve the force condition of the cutter head 1, and effectively increase the service life of the cutter; in addition, by widening the width L' of the outermost cutter head in the cutter head 1 arranged in a ladder shape, it is possible for the smooth falling of the short cutting section. Create more space and solve the problem of tool clamping.

The structures described in the utility model are not limited to the examples described in the specific implementation manners. Those skilled in the art can obtain other implementation modes according to the technical solutions of the utility model, which also belong to the technical innovation scope of the utility model.

Claims (3)

1. a Novel shearing tool, comprise tool rest (2) and the stepped a plurality of cutter heads (1) that are fixed in tool rest (2), and cutter head (1) is long strip type, it is characterized in that, the blade of cutter head (1) is the straight flange sword, blade angle θ ₁=90 °, the height H of straight flange sword cutting edge ₁For the 1/5-3/5 of cutter head (1) height H, and cutting edge tip rounding shape.

2. a kind of Novel shearing tool according to claim 1, is characterized in that, the blade angle [alpha] of cutter head (1) is the 150-179 degree.

3. a kind of Novel shearing tool according to claim 1 and 2, is characterized in that, in the stepped a plurality of cutter heads (1) that are arranged in tool rest (2), the width L' of outermost cutter head (1-1) is 1.2-2 times of other cutter head width L.

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