KR20210118266A - Punch press mold for chamfer forming improved machining properties - Google Patents

Abstract

The present invention relates to a punch press mold for chamfering with improved workability; the purpose of the technical implementation is to perform chamfering on the piercing hole forming part of the pre-processed product material, the product generated during the chamfering process Prevents deformation or breakage of the chamfered part by eliminating the material's pushing or sagging or the residual phenomenon of burrs, thereby minimizing the defect rate of press-formed products, thereby reducing the efficiency and precision of chamfering. An object of the present invention is to provide a punch press mold for chamfer molding with improved workability so that the
Therefore, as a specific means of the present invention for achieving the above object; A punch press apparatus for chamfering formed of a material fixing unit, an upper-type chamfering unit, and a lower-type chambering unit; The upper-type chamfering unit is formed of an upper-type stripper having an upper-type punching guide hole and an upper-type elastic guide, and an upper-type movable plate fixedly coupled to the upper-type chamfering punch; The lower type chamfering unit is achieved by forming a lower die stripper having a lower type punching guide hole and a lower type elastic guide, and a lower type movable plate in which the lower type chamfering punch is fixedly coupled.

Description

Punch press mold for chamfer molding with improved processability

The present invention relates to a punch press mold for chamfer molding, and more particularly, to a product material pre-processed by a press device, for example, a piercing hole forming part pre-formed with a pre-processed product material, an upper chamfering punch unit and When performing secondary chamfering by using a press device for chamfering consisting of a lower chamfering punch unit, the pushing or deflection of the product material that occurs during the chamfering process, or the residual phenomenon of burrs, etc. is excluded. It relates to a punch press mold for chamfer molding, which has improved workability so as to prevent deformation or breakage of the chamfered part and thereby minimize the defect rate of the press-molded product.

Press working refers to a kind of cooling processing method in which a material having properties such as plasticity, malleability, and fluidity is cut or molded into a desired shape and shape using a machine called a press and a special tool called a mold.

Press working is a specialized processing method for forming relatively thin products. It has the characteristic of mass-producing products of the same shape in a short time within the range that the durability of the mold is allowed. In particular, other processing such as hot working It is widely used in various industrial fields due to the advantage of relatively low maintenance cost compared to the conventional method.

As described above, press working has long been established as a molding method representing the plastic working field, so let's look at the classification of these press working methods in more detail;

This includes, for example, punching, shearing, blanking, trimming, notching, slotting, slitting, separating, shaving, etc., using a shearing machine or a mold to apply a pressure greater than or equal to the breaking strength to the material to cut it;

Bending processing, such as curling, seaming, bending, burring, and flanging processing, to form products of various shapes by simultaneously applying tensile and compressive pressures based on the neutral plane of the processed plate;

a drawing process in which a metal plate or a material with high plasticity is dragged into a die, such as drawing, restriking, ironing, etc., to form a seamless cup or container so that wrinkles or cracks do not occur;

A molding process for producing a product of a desired shape and shape by putting a metal plate in the upper and lower parts of the mold and applying pressure, such as embossing, beading, expanding, bulging, necking, and plating;

Compression processing, such as stamping, marking, sizing, pressing, upsetting, swaging, heading, forging, extrusion, etc., by applying a strong compressive force to mold the product into the shape inside the mold; It is broadly classified into five categories as

Here, in particular, punching in the shearing process described above means punching a hole in a plate-shaped metal or performing processing such as punching or chamfering using a mold. In particular, in performing chamfering using punching, chamfering It is common to use a punch press mold device for

Accordingly, a brief summary of the basic configuration of a conventional punch press apparatus for chamfering is provided. This is an upper chamfering unit in which a material fixing plate is used as a central configuration, and a descending chamfering punch is coupled to the upper surface of the material fixing plate. Separately installed, and again, the lower chamfering unit in which the lifting chamfering punch is coupled to the lower surface of the material fixing plate is installed and configured.

The punch press device for chamfering of this configuration seats the product material having the piercing hole formed by pre-processing on the upper surface of the material fixing plate, and the upper side and the lower side on which the product material is seated, for example, the upper chamfering unit and the lower chamfering unit, by driving the descending chamfering punch and the ascending and descending chamfering punch in a symmetrical structure vertically and vertically to apply a pressing action to the upper and lower surfaces of the piercing hole formed of the product material in a butt-type structure, It consists of the process of forming a chamfer.

However, as described above, in the conventional punch press device for chamfering, the upper and lower chamfering units symmetrically installed on the upper and lower surfaces of the material fixing plate as a central component are fixed and spaced apart. However, only the configuration of the descending chamfering punch and the ascending and descending chamfering punch is vertically driven, and the configuration or function of supporting or fixing the product material to be separately chamfered is not provided at all. , in performing the chamfering process, there is a problem in that the processed product material is pushed and sags, and the defect rate of the molded product is excessively amplified due to the generation of a large amount of burrs.

In addition, as described above, in the conventional punch press device for chamfering, the shear angle of the descending chamfering punch and the ascending and descending chamfering punch, for example, the inclination angle of each pressing end forming the chamfer is inserted into the inner diameter of the piercing hole and abutted. As the chamfer is formed with an unnecessary extra inclination angle length, a pushing phenomenon occurs at the edge of the chamfer to be formed.

Korean Patent Registration No. 1514622 Korean Patent Registration No. 1838655

Accordingly, the present invention has been devised to solve the general problems of the conventional punch press for chamfering;

An object of the present invention is to eliminate the chamfering process on the piercing hole formation part of the pre-processed product material, to eliminate the residual phenomenon of the burr or the pushing or sagging of the product material that occurs during the chamfering process. By doing this, a punch press mold for chamfer molding with improved processability to prevent deformation or breakage of the chamfered part, thereby minimizing the defect rate of press-molded products, and greatly improving the efficiency and precision of chamfering. is in providing.

In addition, an object of the present invention is to form the shear angle of the press end of the upper type chamfering punch and the lower type chamfering punch in the same configuration as the forming area and angle of the chamfer to be processed, so that the press end is unnecessary as the inner diameter of the piercing hole. By preventing the negative end of being inserted and extending through digging, and thus also preventing the edge of the chamfer being processed from being pushed and deformed, the chamfer defect rate is lowered and the efficiency of chamfering is relatively improved. To provide a punch press mold for chamfer molding.

As a specific means of a punch press mold for chamfer molding having improved processability according to the present invention for achieving the above object;

A punch press apparatus for chamfering formed of a material fixing unit, an upper-type chamfering unit, and a lower-type chambering unit;

The upper-type chamfering unit is formed of an upper-type stripper having an upper-type punching guide hole and an upper-type elastic guide, and an upper-type movable plate fixedly coupled to the upper-type chamfering punch;

The lower type chamfering unit is achieved by forming a lower die stripper having a lower type punching guide hole and a lower type elastic guide, and a lower type movable plate in which the lower type chamfering punch is fixedly coupled.

As mentioned above, in the punch press mold for chamfering with improved workability according to the present invention, in performing a series of chamfering, the upper and lower surfaces of the product material by the symmetrical driving action of the upper chamfering unit and the lower chamfering unit By providing a strong adhesion and fixing force to the chamfer, it is possible to fundamentally exclude the residual phenomenon of burrs or pushing or sagging of the product material that occurs during the chamfering process. Accordingly, it provides the effect of improving the efficiency and precision of chamfering, such as minimizing the defect rate of press-molded products.

Alternatively, the punch press mold for chamfer molding with improved processability according to the present invention has the same configuration as the molding area and angle of the chamfer to process the shear angle formed by the pressing ends of the upper chamfering punch and the lower chamfering punch. By forming a chamfer, the pressurized end is prevented from unnecessarily digging into the inner diameter of the pre-machined piercing hole, thereby preventing the edge of the chamfer being processed accordingly, thereby reducing the rate of shape defect of the chamfer and relatively efficient chamfering. provides very useful expected effects, such as improving.

1 is a schematic cross-sectional view of a punch press mold for chamfer molding with improved workability according to the present invention.
2 is a cross-sectional view of the working state of the punch press mold for chamfer molding with improved workability according to the present invention.
3 is an enlarged configuration diagram of part A of FIG. 2 .
4 is an enlarged perspective view of a main part of a punch press mold for chamfer molding having improved workability according to the present invention.
5 is a cross-sectional view of the main part of this embodiment of the punch press mold for chamfer molding with improved workability according to the present invention.
6 is a cross-sectional view of the working state of this embodiment of the punch press mold for chamfer molding with improved workability according to the present invention.

The following detailed description is provided to provide a comprehensive understanding of the methods, apparatus, and/or systems described herein. However, this is merely an example and the present invention is not limited thereto.

In describing the embodiments of the present invention, if it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, the terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to intentions or customs of users and operators. Therefore, the definition should be made based on the content throughout this specification. The terminology used in the detailed description is for the purpose of describing embodiments of the present invention only, and should in no way be limiting. Unless explicitly used otherwise, expressions in the singular include the meaning of the plural. In this description, expressions such as “comprising” or “comprising” are intended to indicate certain features, numbers, steps, acts, elements, some or a combination thereof, and one or more other than those described. It should not be construed to exclude the presence or possibility of other features, numbers, steps, acts, elements, or any part or combination thereof.

Hereinafter, the configuration of a preferred embodiment of the punch press mold for chamfer molding with improved workability according to the present invention will be described in detail with reference to the accompanying drawings.

Looking at the schematic configuration of the punch press mold for chamfer molding with improved processability according to the present invention with reference to the accompanying drawings;

It consists of a material fixing unit (1), an upper mold chamfering unit (2), and a punch press apparatus 100 for chamfering including a lower mold chambering unit (3).

Here, first, in the punch press apparatus 100 for chamfer molding, the material fixing unit 1 is a product material pre-processed for chamfer molding, for example, a product material in which a piercing hole P of a through configuration is formed. As a means for fixing and supporting (M), as shown in FIG. 1 or FIG. 2, the material fixing unit 1 has a symmetrical structure on both sides of the left and right sides and is formed in an installation structure spaced apart by a predetermined distance. This is preferable.

At this time, the above-mentioned material fixing unit 1 is formed by any one of the fixing means of the vise or clamp configuration widely used as a general fixing means for the work.

In addition, in the punch press device 100 for chamfering, the upper type chamfering unit 2 performs an elevating driving action and is a required value on the upper surface of the piercing hole P of the pre-processed product material M. As a configuration for performing chamfering in a set area and angle range, the upper type chamfering unit 2, as shown in FIG. Forming a stripper 21 provided with an upper elastic guide 212 on both sides of the left and right sides, the upper surface of the stripper 21 is installed at a predetermined distance in a structure connected to the upper elastic guide 212 on the upper surface, and the upper mold chamber in the center It is preferable to form the upper die movable plate 22 to which the furring punch 221 is fixedly coupled.

At this time, in the above-described upper-type chamfering unit 2, the upper-type chamfering punch 221 coupled to the upper-type movable plate 22 is, as shown in FIG. 3 or 4, the piercing of the product material (M). A pressing end (C) for processing a chamfer in direct contact with the ball (P) is formed, and a shear angle (a) for chamfering, for example, a chamfer inclination angle, is further formed at the pressing end (C), the shear angle (a) is formed with the same standard area and angle as the area and angle of the chamfer to be machined.

In addition, in the punch press apparatus 100 for chamfering, the lower mold chamfering unit 3 performs an elevating driving action and is a required value on the lower surface of the piercing hole P of the pre-processed product material M. As a configuration for performing chamfering in a set area and angle range, the lower mold chamfering unit 3 is a lower mold punching guide hole 311 that takes a vertical penetration structure in the central part, as shown in FIG. 1 , and the lower surface A lower mold stripper 31 provided with a lower mold elastic guide 312 is formed on both sides of the left and right sides, and is installed at a predetermined distance in a structure connected to the lower mold elastic guide 312 on the upper surface of the lower mold stripper 31, and the lower mold in the center It is preferable to form the upper die movable plate 22 to which the chamfering punch 321 is fixedly coupled.

At this time, in the lower mold chamfering unit 3 described above, the lower mold chamfering punch 321 coupled to the lower mold movable plate 32 is, as shown in FIG. 3 or 4 , the product material (M) on the upper surface. ) in direct contact with the piercing hole (P) to form a pressing end (C) for processing the chamfer, and further forming a shear angle (a) for chamfering at the pressing end (C), for example, a chamfer inclination angle, The shear angle (a) is formed to have the same standard area and angle as the area and angle of the chamfer to be processed.

On the other hand, as a reference description, the above-described upper type chamfering unit 2 and the lower type chamfering unit 2 have the same configuration formed symmetrically on the upper and lower surfaces of the material fixing unit 1 as the center, and these are only , only the names and symbols are changed for convenience of explanation, and both configurations are not different.

Therefore, looking at the mutual coupling relationship of the punch press mold for chamfer molding with improved processability according to the present invention consisting of a series of configurations as described above;

This is, as shown in FIG. 1, with the material fixing unit 1 installed spaced apart in a left and right symmetrical structure as the central configuration, the upper chamfering unit 2 is placed on the upper surface of the material fixing unit 1 at a predetermined interval. It is installed in a spaced structure, and the lower mold chamfering unit 3 is installed on the lower surface of the material fixing unit 1 in a structure spaced apart by a predetermined distance, and again, the upper movable plate 22 and the lower mold of the upper chamfering unit 2 As shown in FIG. 1 or FIG. 2, the lower mold movable plate 32 of the chamfering unit 3 is integrally connected to one hydraulic driving part 4 by a hydraulic line L, and the one hydraulic driving part 4 ) to implement the punch press mold for chamfering with improved workability according to the present invention by allowing the upper and lower movable plate 22 and the lower movable plate 32 to be driven up and down in a symmetrical structure at the same time.

In addition, looking at the chamfering process using the punch press mold for chamfering with improved workability according to the present invention, which is composed of a coupling configuration as described above;

This, first, the piercing hole (P) is formed in the fixing method as shown in Figure 1, for example, horizontally fixed by the material fixing unit (1) spaced apart in a left and right symmetric structure.

After that, when the hydraulic drive unit 4 is turned on in a state in which the product material is fixed, the upper die movable plate 22 lowers, and at the same time, the lower die movable plate 32 lifts and lowers.

Then, the upper mold stripper 21 is elastically compressed by the lowering pressure of the upper movable plate 22 and is in close contact with the upper surface of the horizontally fixed product material with strong pressure, and at the same time by the lifting pressure of the lower movable plate 32 The lower type stripper 21 is also elastically compressed and is in close contact with the lower surface of the fixed product material by strong pressure, so that the upper and lower surfaces of the product material by the upper type stripper 21 and the lower type stripper 31 are a kind of sandwich type adhesion structure. fixed with

At this time, when the product material is fixed in a sandwich-type adhesion structure by the upper type stripper 21 and the lower type stripper 31, the upper type chamfering punch 221 coupled to the upper type movable plate 22 and the lower type movable plate 32 The combined lower-type chamfering punch 321 is, as shown in FIG. 3 or FIG. 4, as a form facing each other in a symmetrical structure on the upper and lower surfaces of the piercing hole P formed of the product material M, punching By applying pressure, double-sided chamfering is performed within the set area and the shear angle (a) range, and the operation is finished.

On the other hand, Figures 5 and 6 show this embodiment of the punch press mold for chamfer molding with improved workability according to the present invention.

As such, the present invention as this embodiment is, as shown in FIG. 5, a material fixing unit (1) spaced apart in a symmetrical structure on both left and right sides, and the material fixing unit (1) in a central configuration, the upper part Forming a punch press device 100 consisting of an upper-type chamfering unit (2) spaced apart on the surface and a lower-type chambering unit (3) spaced apart on a lower surface;

The upper-type chamfering unit (2) is an upper-type stripper 21 in which an upper-type elastic guide 212 is installed on the left and right surfaces of the upper surface, and an upper-type elastic guide 212 on the upper surface of the upper-type stripper 21. It is installed to be spaced apart, and is formed as an upper movable plate 22 in which the upper mold chamfering punch 221 is fixedly coupled to the central portion;

The lower mold chamfering unit 3 is spaced apart in a structure connected to a lower mold contact plate 33 provided with a lower mold elastic guide 312 on the left and right sides, and a lower mold elastic guide 312 on the lower surface of the lower mold adhesion plate 33 It is preferable to form the lower mold close movable plate 34 to be installed.

At this time, as described above, the present invention as this embodiment has the same configuration as that of the above-described embodiment, but only the configuration of the lower mold chamfering unit 2 is made of the lower mold close contact plate 33 and the lower mold close contact movable plate 34 . configure differently.

Therefore, in the present invention as this embodiment, the chamfering operation is performed in the same operating manner as in the above-described embodiment, but only, as shown in FIG. 5 or FIG. 33) in a form in which the lower surface of the product material (M) is simply supported, and only the upper surface of the piercing hole (P) of the product material (M) is subjected to cross-section chamfering only by the upper type chamfering unit (2). This also does not depart from the scope of the present invention.

1: Material fixing unit 2: Upper type chamfering unit
3: lower type chamfering unit 11: upper type elastic guide
12: lower type elastic guide 21: upper type stripper
22: upper type movable plate 31: lower type stripper
32: lower mold movable plate 33: lower mold adhesion plate
34: lower type close movable plate L: hydraulic drive line
P: Pressed end α: Seeing angle

Claims (4)

The material fixing unit (1) installed in a symmetrical structure on both sides of the left and right sides, and the material fixing unit (1) in the central configuration, and the upper and lower chamfering units (2) and the lower molds installed symmetrically on the upper and lower surfaces and a punch press device 100 for chamfering made of a chambering unit 3;
The upper type chamfering unit (2), the upper type elastic guide 212 is installed on the left and right side of the upper surface, the upper type stripper 21, the upper type stripper 21, the upper surface of the upper surface of the elastic guide 212 is connected to the structure. It is installed to be spaced apart, and is formed by an upper movable plate 22 in which the upper mold chamfering punch 221 is fixedly coupled to the central portion;
The lower mold chamfering unit 3 is spaced apart in a structure connected to the lower mold elastic guide 312 installed on the lower left and right sides of the lower surface, and the lower mold elastic guide 312 on the lower surface of the lower stripper 31 A punch press mold for chamfering with improved workability, characterized in that it is installed, and is formed by a lower mold movable plate 32 fixedly coupled to the lower mold chamfering punch 321 in the center to perform double-sided chamfering.
The method of claim 1 ;
The upper movable plate 22 of the upper chamfering unit 2 and the lower movable plate 32 of the lower chamfering unit 3 are simultaneously lifted and lowered in an up and down symmetrical structure by controlling one hydraulic drive unit 4 . A punch press mold for chamfer molding with improved processability.
The method of claim 1 ;
The upper chamfering punch 221 coupled to the upper movable plate 22 and the lower chamfered punch 321 coupled to the lower movable plate 32 include those having a pressing end P formed thereon;
A shear angle (a) for chamfering is further formed on the pressing end (C), wherein the shear angle (a) is formed to have an area and angle of the same standard as the area and angle of the chamfer to be processed. A punch press mold for chamfering with improved processability.
A material fixing unit (1) spaced apart in a symmetrical structure on both sides of the left and right sides, an upper type chamfering unit (2) spaced apart from the upper surface of the material fixing unit (1) in a central configuration, and spaced apart from the lower surface and a punch press device (100) comprising a lower mold chambering unit (3);
The upper type chamfering unit (2), the upper type elastic guide 212 is installed on the left and right side of the upper surface, the upper type stripper 21, the upper type stripper 21, the upper surface of the upper surface of the elastic guide 212 is connected to the structure. It is installed to be spaced apart, and is formed by an upper movable plate 22 in which the upper mold chamfering punch 221 is fixedly coupled to the central portion;
The lower mold chamfering unit 3 is spaced apart in a structure connected to the lower mold elastic guide 312 installed on the left and right sides, and the lower mold adhesion plate 33 on the lower surface of the lower mold adhesion plate 33 and the lower mold elastic guide 312 A punch press mold for chamfering with improved workability, characterized in that it is formed with the installed lower mold close-fitting movable plate (34) and subjected to end face chamfering.

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