CN2238715Y

CN2238715Y - Cutter for card cutting machine

Info

Publication number: CN2238715Y
Application number: CN 96205470
Authority: CN
Inventors: 张保乐
Original assignee: ZHENGDA VISITING CARD MACHINERY FACTORY LUCHENG WENZHOU CITY
Current assignee: ZHENGDA VISITING CARD MACHINERY FACTORY LUCHENG WENZHOU CITY
Priority date: 1996-02-15
Filing date: 1996-02-15
Publication date: 1996-10-30
Anticipated expiration: 2006-02-15

Abstract

The utility model relates to a cutter for card cutting machines, which is characterized in that the end surface of the cutter is an inner concave arc surface whose middle part is lower than the circumference, and the blade angle is smaller than 90 DEG. The utility model overcomes the defects of big cutting force of the common cutter for card cutting machines and multiple rough edges and has the advantages of simple structure and convenient operation, and the cutting force is 50% of the original design according to a test.

Description

The card-cutting machine cutting die

The utility model relates to a kind of card-cutting machine cutting die.

Common blanking cutter, we can be considered as it the scissors of enclosed shape, the shearing strength of its blanking power=cutting edge coefficient * material * blanking cutting edge periphery length overall * material thickness.Analyze following formula, it is certain to work as material character as can be seen, material thickness one regularly, the principal element that influences blanking power is cutting die periphery length overall and cutting edge coefficient, and as flat sword blanking cutting die, its all blades act on simultaneously to be cut on the material, and it is to cause hundreds of times that active area has increased by tens times, is to cause hundreds of times so shearing force has also increased tens times thereupon.In order to overcome above-mentioned defective, promptly for the time work girth that reduces shearing knife edge, the designer opens four jiaos of the flat blade cutter mould low again, form mid portion height low central rhombus plane all around, blanking begins incision by four summits of rhombus, progressively material is separated, blanking force rate flat blade cutter mould has descended doubly a lot.Though the shortcoming that this design has avoided blade to work has simultaneously reduced blanking power, it is not an optimal design, also exists another defective--the cutting edge corner cut belongs to negative rake and shears greater than 90 °.Cutting force is increased, and the blade sharpness reduces.From the micro-analysis of blanking process, when cutter during greater than 90 °, to a great extent, material is not to be sheared separation, but be stretched earlier, bending, tear then and separate, this causes the cutting edge coefficient bigger just, the reason place that the burr phenomenon is difficult to overcome.

The purpose of this utility model is the above-mentioned deficiency that overcomes prior art, thereby provides a kind of blanking power littler, cuts to carry the better card-cutting machine cutting die of effect.

Technical solution of the present utility model is that the end face with cutting die is designed to the inner concave arc surface of middle body around being lower than, and its blade angle is less than 90 °.

Below in conjunction with drawings and Examples detailed content of the present utility model is described.

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the structural representation of another embodiment of the utility model;

Fig. 3 is the A-A profile of Fig. 2;

Fig. 4 is the B-B profile of Fig. 2.

As shown in the figure, the utility model is designed to the inner concave arc surface of middle body around being lower than with the end face of cutting die, and the angle of its cutting edge is less than 90 °.Fig. 2 provides a most preferred embodiment, cutting die end face shown in it is two cylindrical cambered surfaces around middle body is lower than, the angle of its cutting edge is also less than 90 °, two cylindrical cambered surfaces not only intersect with the α angle, and the axis of two cylindrical surface keeps certain height poor on short transverse, because this difference in height, mould is asymmetric distribution with the point of a knife of two blades formation on limit, and the height of point of a knife is also unequal.When blanking work began, the point of a knife on long limit is the incision paper card earlier, the point of a knife of minor face incision paper card then, blanking is participated in and withdrawed to four jiaos blade sequentially, avoided cutting die around whole blades situations of working simultaneously.

The utility model is by above-mentioned concrete structure, has simple in structurely, and blanking power is little, makes With light, cut and carry the advantage that rear paper card does not go out burr.

Claims

1, a kind of card-cutting machine cutting die, the end face that it is characterized in that this cutting die are the inner concave arc surface around middle body is lower than, and its blade angle is less than 90 °.