CN212525660U

CN212525660U - Die structure for improving height dimension precision of stretched product

Info

Publication number: CN212525660U
Application number: CN202020517810.5U
Authority: CN
Inventors: 郭平喜; 王绍春; 王超军; 王运芳
Original assignee: Hebei Chaoya Precision Coined Electronics Co ltd
Current assignee: Hebei Chaoya Precision Coined Electronics Co ltd
Priority date: 2020-04-10
Filing date: 2020-04-10
Publication date: 2021-02-12
Anticipated expiration: 2030-04-10

Abstract

The utility model discloses a die structure for improving the height and size precision of a stretched product, which comprises an upper die and a lower die positioned below the upper die, wherein the upper die comprises a fixed plate, a discharging backing plate and a discharging plate which are fixedly connected in sequence from top to bottom; the length of the male die sheath is equal to the sum of the thicknesses of the fixing plate, the discharging base plate and the discharging plate, and the male die sheath is completely attached between the outer side wall of the stretching male die and the inner side wall of the upper through hole. The utility model discloses an improvement has greatly improved the shaping precision of punching press extension piece height dimension. The unstable change of the height dimension of the stamping product caused by the clearance adjustment change of other forming stations in the height direction in the die maintenance in the stamping production process is also overcome, and the unstable change of the height dimension of the stamping stretching piece caused by factors such as scrap in the die is also completely avoided.

Description

Die structure for improving height dimension precision of stretched product

Technical Field

The utility model relates to a mould processing technology field relates to the forming die that upgrades of the more shallow tensile product of thick material belt flange, specifically relates to a promote tensile product height dimension precision's mould structure.

Background

The traditional common progressive die structure is composed of an upper die part, a discharging part and a lower die part.

The upper die part comprises: an upper cover plate, an upper die holder, an upper backing plate and a fixing plate. The main functions of the device relate to the installation of a guide part, a guide pillar and a guide sleeve, a positioning part (a positioning pin), a discharging spring (the discharging plate has the ejection and discharging function), the stamping forming, a punching male die and the like of the die precision.

The discharge part comprises: a discharging backing plate and a discharging plate. The high-speed stamping die has the main functions of participating in the forming of stamping parts and enabling the stamping material belt to be separated from the upper die when the die is opened through the equal-height sleeve assembly by force transmission of a discharging spring arranged on the upper die. The discharge part also belongs to the upper die.

The lower die part includes: the die comprises a concave die plate, a lower backing plate and a lower die base. The main functions of the device relate to the installation of guide parts (guide columns and guide sleeves), positioning parts (positioning pins) and guide floating parts (floating and guiding of a stamping material belt) of the overall precision of a die, the installation of stamping forming and a punching female die and the like.

The traditional stretching process is used for forming:

when downward stretching is adopted, a stretching male die fixed on an upper die fixing plate pulls the material into a forming cavity of a female die plate along with the die closing process, and the material is subjected to multiple stretching forming according to requirements to form the required shape and size of a product, and then the product is cut;

when upward stretching is adopted, a stretching male die fixed on a female die plate pulls the material into a forming cavity of the discharging plate along with the die closing process, and the material is subjected to multiple stretching forming according to requirements to form the required shape and size of a product, and then the product is cut.

In the forming process of the traditional progressive die, when the die is punched to a lower dead point, all die plates of the die are overlapped, wherein the gap between the discharging base plate and a fixed plate (m in figure 1) is zero. But the design of the drawing die is mostly left with a gap. Or no gap exists in the design, but in the mold manufacturing and testing stage, the stretching height of each station is adjusted, and the state is changed after the test mold is qualified.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a promote mould structure of tensile product height dimension precision is provided, improved the shaping precision of punching press tensile member height dimension. The unstable change of the height dimension of the stamping product caused by the clearance adjustment change of other forming stations in the height direction in the die maintenance in the stamping production process is also overcome, and the unstable change of the height dimension of the stamping stretching piece caused by factors such as scrap in the die is also completely avoided.

In order to solve the above problems, the utility model adopts the following technical proposal:

a die structure for improving the height dimension precision of a stretched product comprises an upper die and a lower die positioned below the upper die, wherein the upper die comprises a fixing plate, a discharging base plate and a discharging plate which are fixedly connected in sequence from top to bottom;

the length of the male die sheath is equal to the sum of the thicknesses of the fixing plate, the discharging base plate and the discharging plate, and the male die sheath is completely attached between the outer side wall of the stretching male die and the inner side wall of the upper through hole.

As a further improvement of the invention, the lower die comprises a concave die plate, a lower through hole which is vertically arranged in the middle of the upper die, and a supporting material which is fixed in the lower through hole.

As a further improvement of the invention, the upper end surface of the support material is opposite to the lower end surface of the stretching male die;

the upper end face of the supporting material is used for supporting the bottom face of the stretching piece, and the lower end face of the stretching male die is used for stamping the top face of the stretching piece.

Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:

the utility model discloses an improvement has greatly improved the shaping precision of punching press extension piece height dimension. The unstable change of the height dimension of the stamping product caused by the clearance adjustment change of other forming stations in the height direction in the die maintenance in the stamping production process is also overcome, and the unstable change of the height dimension of the stamping stretching piece caused by factors such as scrap in the die is also completely avoided. The improvement of the die structure has a very positive effect on improving the forming precision of the height dimension of the stamping stretching piece and improving the stamping process capability index (the dimension has the CPK value requirement). For the forming of the upward stretching die, only a forming female die component originally arranged on the stripper plate in the forming station of final stretching and shaping is required to be refitted on the upper die fixing plate.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural view of a prior art progressive die;

FIG. 2 is a schematic view of a prior art draw down forming structure;

fig. 3 is a schematic view of a downward stretch forming structure of the present invention.

Wherein:

the device comprises a fixing plate 1, a discharging base plate 2, a discharging plate 3, a concave die plate 4, a convex die sheath 5, a stretching convex die 6, a supporting material 7, a concave die insert 8, a blank holder 9 and a stretching part 10.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

In the structure of the progressive die, the auxiliary guide post, the guide sleeve assembly and the equal-height sleeve assembly in the die are adopted, so that the stripper can be accurately pressed and stably operated in the stamping process, and the function of accurately guiding the male die and the like arranged on the fixed plate is achieved. As shown in fig. 2, the existing downward drawing structure includes an upper die and a lower die located below the upper die, the upper die includes a fixing plate 1, a discharging backing plate 2 and a discharging plate 3 which are fixedly connected in sequence from top to bottom, an upper through hole is formed in the middle of the upper die in the vertical direction, a drawing male die 6 is sleeved in the upper through hole, and a blank holder 9 is fixed on the side wall of an inner hole of the discharging plate 3; the lower die comprises a concave die plate 4, a lower through hole which is vertically arranged in the middle of the upper die, and a supporting material 7 which is fixed in the lower through hole.

In the actual stamping process of the die, because of the adjustment of the forming height direction clearance of the forming station (some shaping stations generate interference clearance), foreign matters (stamping scraps) and the like in the die, the stripper plate can be subjected to the action force for enabling the stripper plate to generate inclination, and the forming precision of the stamping part can be influenced by the forming part arranged on the stripper plate (the blank holder acts on the periphery of the tensile stamping part with the inclination of the stripper plate under different pressures). When the position accuracy of the bottom dead center of the punch, namely the clearance between the crankshaft and the slide block is large and the clearance exists between the discharging base plate and the fixed plate, the influence on the forming accuracy of the height dimension of the stamping part is larger.

Taking the example of die down draw, the above described variation of the stripper plate affects the accuracy of dimension a1, i.e., the accuracy of the height dimension of the drawn piece.

As shown in fig. 3, a die structure for improving the height and size precision of a stretched product comprises an upper die and a lower die positioned below the upper die, wherein the upper die comprises a fixed plate 1, a discharging backing plate 2 and a discharging plate 3 which are fixedly connected from top to bottom in sequence, an upper through hole is formed in the middle of the upper die in the vertical direction, a stretching male die 6 is sleeved in the through hole of the upper die in a penetrating manner, and a male die sheath 5 is fixed on the inner side wall of the upper through hole;

the length of the male die sheath 5 is equal to the sum of the thicknesses of the fixing plate 1, the discharging base plate 2 and the discharging plate 3, and the male die sheath 5 is completely attached between the outer side wall of the stretching male die 6 and the inner side wall of the upper through hole.

Further, the lower die comprises a concave die plate 4, a lower through hole formed in the middle of the upper die in the vertical direction, and a supporting material 7 fixed in the lower through hole.

Further, the upper end face of the supporting material 7 is opposite to the lower end face of the stretching male die 6;

the upper end face of the supporting material 7 is used for supporting the bottom face of the stretching piece 10, and the lower end face of the stretching male die 6 is used for stamping the top face of the stretching piece 10.

The utility model discloses forming technology has made the improvement to the mould shaping structure, uses the drawing down as an example equally, like figure 3. And (3) shaping the punched part at the last station of the drawing process, and modifying a blank holder arranged on the stripper plate in the traditional die structure on an upper die fixing plate (the blank holder is replaced by a male die sheath). In this way, the force acting on the punch sleeve on the punching tension member due to the height direction clearance interference caused by the height direction clearance adjustment of the forming at other forming stations, the tilting force caused by foreign matters (punching scraps) in the die and the like and acting on the stripper plate cannot be influenced, and the height a2 of the tension member is not influenced any more. The punch press influences the larger clearance between the crankshaft and the slide block of the precision of the bottom dead center position of the die, and the clearance between the discharging base plate and the fixed plate, which is beneficial to ensuring the height size of the stretching piece.

In conclusion, the improvement of the die structure greatly improves the forming precision of the height dimension of the stamping and stretching piece. The unstable change of the height dimension of the stamping product caused by the clearance adjustment change of other forming stations in the height direction in the die maintenance in the stamping production process is also overcome, and the unstable change of the height dimension of the stamping stretching piece caused by factors such as scrap in the die is also completely avoided. The improvement of the die structure has a very positive effect on improving the forming precision of the height dimension of the stamping stretching piece and improving the stamping process capability index (the dimension has the CPK value requirement).

For the forming of the upward stretching die, only a forming female die assembly originally arranged on the stripper plate in the forming station of final stretching and shaping is required to be arranged on the upper die fixing plate.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; it is obvious to those skilled in the art that a plurality of embodiments of the present invention may be combined. Such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.

Claims

1. The utility model provides a promote mould structure of tensile product height dimension precision, includes the mould and is located the bed die of mould below, its characterized in that: the upper die comprises a fixed plate (1), a discharging base plate (2) and a discharging plate (3) which are fixedly connected from top to bottom in sequence, an upper through hole formed in the middle of the upper die in the vertical direction, a stretching male die (6) penetrating and sleeved in the upper die through hole, and a male die sheath (5) fixed on the inner side wall of the upper through hole;

the length of the male die sheath (5) is equal to the sum of the thicknesses of the fixing plate (1), the discharging base plate (2) and the discharging plate (3), and the male die sheath (5) is completely attached between the outer side wall of the stretching male die (6) and the inner side wall of the upper through hole.

2. The die structure for improving the height dimension accuracy of the stretched product according to claim 1, wherein: the lower die comprises a concave die plate (4), a lower through hole formed in the middle of the upper die in the vertical direction and a supporting material (7) fixed in the lower through hole.

3. The die structure for improving the height dimension accuracy of the stretched product according to claim 2, wherein: the upper end surface of the supporting material (7) is opposite to the lower end surface of the stretching male die (6);

the upper end face of the supporting material (7) is used for supporting the bottom face of the stretching piece (10), and the lower end face of the stretching male die (6) is used for stamping the top face of the stretching piece (10).