CN218656352U - Novel high-precision one-time punching structure - Google Patents

Abstract

The utility model discloses a novel die-cut structure of high accuracy once, including the die, arrange the die top in and be used for pushing down the pressure flitch of waiting to punch the product and be used for the drift of blanking product, the drift is provided with into the first edge of a knife that is used for just dashing of step form and is used for the second edge of a knife that the essence dashes, second edge of a knife department is provided with the chamfer. In this way, the utility model discloses simple structure, design benefit, a blanking is accomplished just to dash and is dashed the twice process with the essence, can reduce the corner collapse, and increase bright area provides drift life.

Description

Novel high-precision one-time punching structure

Technical Field

The utility model relates to a die-cut shaping technical field especially relates to a novel die-cut structure of high accuracy.

Background

The material separation process during blanking can be divided into three stages: <1> elastic deformation phase: elastic deformation occurs at the initial stage when the punch just contacts the plate; <2> plastic deformation stage: the downward pressure of the punch is increased, and plastic deformation occurs until microcracks occur; <3> fracture separation stage: the drift continues down, and pressure increase, the microcrack expansion, coincidence, fracture, blanking power decline gradually, the elastic deformation stage: the blanking force gradually rises, and the plastic deformation stage is as follows: the blanking force reaches a peak value.

Section characteristics of a common blanking piece: the method comprises the following steps that (1) an initial corner collapse is generated in a main single deformation stage of a corner collapse zone a, and a side plastic deformation stage is driven; <2> the bright band b is generated in the plastic deformation stage, the section is smooth and flat, and the bright band b is a section with the best quality; <3> fracture zone c, tear caused, rough and matt surface with taper; <4> burr region d, when microcracking occurs, burrs are generated as shown in fig. 1.

The blanking clearance refers to the size difference between the cutting edges of a male die and a female die of a blanking die, the influence of the clearance on the service life of the die is caused by the friction between a workpiece and the side walls of the male die and the female die, the clearance is small, the friction is large, the service life of the die is short, in the blanking process, the friction between the female die and a blanking part between the male die and a punched hole is serious, the smaller the clearance is, the more serious the friction is, the too small clearance is extremely bad for the service life of the die, the larger the clearance can reduce the friction between the side surfaces of the male die and the female die and materials, and the influence of the uneven clearance can only be relieved, so the service life of the die is prolonged.

Punching press production requires that the blanking spare has great bright band, and the chi volume reduces the width in fracture area region, and for obtaining the face of dashing that the corner collapse is less, bright band accounts for more, fracture area is less at present, often adopt a plurality of processes such as just dashing, fine blanking to carry out the blanking, the board needs the tool changing, complex operation, has the condition that product and cutter relative positioning take place the skew, based on above defect and not enough, is necessary to improve current technique, designs a novel die-cut structure of high accuracy once.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the main technical problem who solves provides a novel die-cut structure of high accuracy, and it is smooth inadequately to solve the blanking terminal surface, needs the die-cut problem of multichannel process.

In order to solve the technical problem, the utility model discloses a technical scheme be: the utility model provides a die-cut structure once of novel high accuracy, this kind of die-cut structure once of novel high accuracy includes the die, arranges the die top in and is used for pushing down the pressure flitch of waiting to punch the product and be used for the drift of blanking product, the drift is provided with into the step form be used for the first edge of a knife of just dashing and is used for the second edge of a knife of essence towards, second edge of a knife department is provided with the chamfer.

Preferably, the chamfer size is C0.1 x 15.

Preferably, a section difference of 0.4mm is arranged between the first knife edge and the second knife edge.

Compared with the prior art, the beneficial effects of the utility model are that:

the punch is provided with a first step-shaped cutter edge for initial punching and a second step-shaped cutter edge for fine punching, and the same punch completes two working procedures of initial punching and fine punching;

the process of overstocking has to the product side in the setting of chamfer, reaches better bright area requirement, because second tool edge department blanking clearance is minimum, the edge of a knife is very easy to jump the sword, in order to improve life, makes the material more easily by die-cut, need be with the edge of a knife small arc angle.

Drawings

Fig. 1 is a schematic view of a general blanking cross section.

Fig. 2 is a schematic structural view of a novel high-precision one-step punching structure.

Fig. 3 is a schematic structural diagram of a punch of a novel high-precision one-step punching structure.

Wherein, a corner collapse zone, b, a bright zone, c, a fracture zone, d, a burr zone, 1 and a concave mould, 2, a pressure plate 3, a punch 31, a first knife edge 32, a second knife edge 33 and a chamfer.

Detailed Description

The following detailed description of the preferred embodiments of the present invention will be provided to enable those skilled in the art to more easily understand the advantages and features of the present invention, and to make clear and definite definitions of the protection scope of the present invention.

Referring to fig. 2 and 3, an embodiment of the present invention includes:

the utility model provides a die-cut structure once of novel high accuracy, this kind of die-cut structure once of novel high accuracy includes die 1, arranges die 1 top in and is used for pushing down the pressure flitch 2 of waiting to punch the product and be used for the drift 3 of blanking the product, drift 3 is provided with into the step form and is used for the first edge of a knife 31 of just punching and is used for the second edge of a knife 32 of essence towards, be provided with 0.4 mm's section difference between first edge of a knife 31 and the second edge of a knife 32, when just punching, the blanking clearance is big, and finished product waste material surplus 0.4mm, when the second section essence is towards, the blanking clearance is little, and the same drift is accomplished just towards and essence towards two processes, second edge of a knife 32 department is provided with C0.1 × 15 chamfer 33, and the setting of chamfer has the process of overstocking to the product side, reaches better bright area requirement, because second edge of a knife 32 department blanking clearance is minimum, the edge of a knife is very easy to jump the sword, in order to improve life, makes the material more easily by die-cut, needs to fall down little arc angle.

The utility model relates to a novel die-cut structure during operation of high accuracy, will treat earlier that die-cut material is placed die 1 on, pressure flitch 2 pushes down and treats die-cut material, drift 3 is moved down by the punching machine and is carried out the blanking action, at first edge of a knife 31 just dashes earlier, the blanking clearance is big, finished product waste material surplus 0.4mm, drift 3 moves down, second edge of a knife 32 carries out the essence and dashes, blanking end face corner collapse diminishes, increase the bright area and account for, the blanking clearance is little, meanwhile, there is the process of backlog to the product side in the setting of chamfer, reach better bright area requirement.

The utility model relates to a novel die-cut structure of high accuracy, simple structure, design benefit, a blanking is accomplished just to dash and is dashed the twice process with the essence, can reduce the corner collapse, increases bright area, provides drift life.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims (3)

1. The utility model provides a die-cut structure of novel high accuracy, includes the die, arrange the die top in and be used for pushing down the pressure flitch of waiting to blank the product and be used for the drift of blanking product, its characterized in that: the punch is provided with a first step-shaped cutter edge for initial punching and a second step-shaped cutter edge for fine punching, and a chamfer is arranged at the position of the second cutter edge.

2. A novel high precision one-time die-cut structure according to claim 1, characterized in that: the chamfer size is C0.1 x 15.

3. A novel high precision one-time die-cut structure according to claim 1, characterized in that: and a section difference of 0.4mm is arranged between the first knife edge and the second knife edge.

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