CN113198914B

CN113198914B - Stamping method for part with negative angle and flanging negative angle integrated forming die

Info

Publication number: CN113198914B
Application number: CN202110470689.4A
Authority: CN
Inventors: 楚伟峰; 刘莉; 周富强
Original assignee: Anhui Jianghuai Automobile Group Corp
Current assignee: Anhui Jianghuai Automobile Group Corp
Priority date: 2021-04-28
Filing date: 2021-04-28
Publication date: 2022-06-28
Anticipated expiration: 2041-04-28
Also published as: CN113198914A

Abstract

The invention discloses a stamping method of a part with a negative angle and a flanging negative angle integrated forming die, which comprises the following steps: providing a plate; forming the sheet material into a sheet-like first connected part, wherein the first connected part comprises two connected individual parts; flanging the first connected part to form two self-welding edges correspondingly positioned on the two individual parts so as to form a second connected part; forming two first side edges and two second side edges of the second one-piece part, which are correspondingly positioned on the two individual parts, by flanging, and forming the negative angle characteristic on the two first side edges respectively to form a third one-piece part; punching the third one-piece part for the second time, and dividing the third one-piece part into two individual parts; and shaping each individual part to form the negative angle characteristic on the second side edge of each individual part respectively to obtain a finished workpiece. The part stamping process is simplified, and the die cost is saved.

Description

Stamping method for part with negative angle and flanging negative angle integrated forming die

Technical Field

The invention relates to the technical field of stamping, in particular to a stamping method of a part with a negative angle and a flanging negative angle integrated forming die.

Background

A white automobile body needs three four hundred stamping parts, and the stamping part shape is various, for satisfying the welding assembly demand, and the characteristics such as punching press part design has turn-ups, hole both to satisfy intensity and need possess the function such as installation dodge, and this just leads to many parts structural design complicacies, and the face of weld or installation face have a plurality of direction negative angles, just need many processes to accomplish for solving this type of problem stamping process, and not only mould frock development cost is high, and the inconvenient problem of getting that the negative angle leads to still need to consider in the mould structure.

Disclosure of Invention

The invention mainly aims to provide a stamping method for a part with a negative angle and a flanging negative angle integrated forming die, and aims to solve the problems that the existing stamping process is multiple in working procedures and the development cost of a die tool is high.

In order to achieve the purpose, the invention provides a stamping method of a part with a negative angle, which comprises the following steps:

providing a plate;

blanking and punching: forming the sheet material into a sheet-like first connected part, wherein the first connected part comprises two connected individual parts;

One-time flanging forming: flanging the first connected part to form two self-welding edges correspondingly positioned on the two individual parts so as to form a second connected part;

secondary flanging and primary negative angle forming: forming two first side edges and two second side edges of the second connected part correspondingly on the two individual parts through flanging, and forming the negative angle characteristic on the two first side edges respectively to form a third connected part;

trimming and punching: punching the third one-piece part for the second time, and dividing the third one-piece part into two individual parts;

shaping and secondary negative angle forming: and shaping each individual part to form the negative angle characteristic on the second side edge of each individual part respectively to obtain a finished workpiece.

The invention also provides a flanging negative angle integrated forming die, which is used for realizing the steps of secondary flanging and primary negative angle forming in the stamping method of the part with the negative angle, and the flanging negative angle integrated forming die comprises:

the lower die comprises a lower die fixing seat and a lower die supporting core, wherein the middle part of the upper end surface of the lower die fixing seat is provided with an accommodating channel extending along the vertical direction, and the lower die supporting core is movably arranged in the accommodating channel along the vertical direction;

The upper die comprises an upper die plate movably arranged along the vertical direction, and an upper die material core is arranged in the middle of the lower end surface of the upper die plate corresponding to the lower die material supporting core; and (c) a second step of,

the negative angle forming structure comprises two sliding inserts which are respectively arranged on the left side and the right side of the upper die material core, and the two sliding inserts can move up and down and left and right relative to the upper die material core;

when the die is closed, the lower ends of the two sliding inserts abut against the lower die material supporting core, the upper die plate moves downwards, the two sliding inserts and the lower die material supporting core move downwards together in a pressing mode, the lower ends of the two sliding inserts extend into the accommodating channel and move left and right to abut against the inner wall of the accommodating channel, the upper die plate continues to move downwards to drive the upper die material core to be flush with the lower end faces of the two sliding inserts downwards, and therefore the two sliding inserts, the upper die material core and the lower die material supporting core act together to form a third connected part.

Optionally, the upper mold core has two opposite mounting side surfaces along the left-right direction, and both the two mounting side surfaces incline to the center of the upper mold core from top to bottom;

the two sliding inserts can be installed on the two installation side surfaces in a sliding mode along the up-down direction.

Optionally, two of the mounting side surfaces are respectively provided with a sliding groove extending along an inclined direction thereof;

the two sliding inserts are provided with convex blocks corresponding to the sliding grooves, and the convex blocks are in sliding fit with the sliding grooves.

Optionally, two spring grooves are concavely arranged on the lower end surface of the upper die plate, and the two spring grooves are respectively arranged on the left side and the right side of the upper die core;

compression springs are respectively arranged between the upper template and the two sliding inserts, and two ends of each compression spring are respectively fixed with the upper bottom surface of the corresponding spring groove and the upper end surface of the corresponding sliding insert.

Optionally, an avoiding groove is formed in the lower end of the side face, away from the upper die core, of each sliding insert, and the avoiding groove is used for accommodating a self-welding edge after flanging.

Optionally, the lower mold fixing plate includes:

the middle part of the plate body is provided with a through hole; and (c) a second step of,

the flanging insert group comprises two first flanging inserts and two second flanging inserts which are positioned on the upper end surface of the plate body and on the periphery of the through hole, the two first flanging inserts are oppositely arranged along the left and right direction, the two second flanging inserts are positioned between the two first flanging inserts, the two second flanging inserts and the two first flanging inserts jointly enclose to form the accommodating channel, and the accommodating channel is communicated with the through hole;

Wherein, at least partial outer wall surface of the lower die material supporting core is abutted against the through hole.

Optionally, the opposite side surfaces of the two first flanging inserts are provided with positioning grooves, the upper ends of the two positioning grooves are arranged through the corresponding first flanging inserts, and the opposite wall surfaces of the two positioning grooves and the two second flanging inserts jointly enclose to form the accommodating channel;

the lower ends of the two sliding inserts are used for abutting against the lower wall surfaces of the two positioning grooves when the die is closed, and the side surfaces of the two sliding inserts, which are deviated from each other, abut against the opposite side surfaces of the two positioning grooves.

Optionally, a limiting bump is arranged on the upper end surface of the lower die fixing seat, and the limiting bump is located on the periphery of the accommodating channel;

and the lower end surface of the upper template is provided with a limiting groove corresponding to the limiting lug, and the limiting groove is used for being in inserting fit with the limiting lug when the die is closed.

Optionally, the flanging negative angle integral forming die further comprises a top rod, the top rod is located in the accommodating channel, the upper end of the top rod is fixedly connected with the lower end face of the lower die supporting core, and the lower end of the top rod is used for being connected with a hydraulic cylinder.

In the technical scheme of the invention, two finished workpieces are finally obtained by a plate through the steps of blanking and punching, primary flanging and forming, secondary flanging and primary negative angle forming, trimming and punching, shaping and secondary negative angle forming, wherein before the step of trimming and punching, two individual parts are connected and are stacked in the left and right directions, the two individual parts are separated through the step of trimming and punching, the production efficiency is higher, and the corresponding part processing is completed through a set of die tooling in each step, wherein in the step of secondary flanging and primary negative angle forming, in each individual part, not only the first side and the second side can be synchronously subjected to vertical surface flanging, but also the forming of the negative angle characteristic on the first side is completed, so the technical process of stamping parts with negative angles is reduced, and the step of secondary flanging and primary negative angle forming can be completed through the design of a set of die tooling, the number of the dies involved in the whole stamping step is reduced, and the development cost of the dies is reduced.

Drawings

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

FIG. 1 is a schematic diagram of a finished workpiece obtained by a negative-angle part stamping method provided by the invention;

FIG. 2 is a schematic flow chart of a stamping method for a part with a negative angle provided by the invention;

FIG. 3 is a schematic view of the first connector part of FIG. 2 at step S20;

FIG. 4 is a schematic view of the second one-piece part of FIG. 2 at step S30;

FIG. 5 is a schematic view of a third one-piece part from step S40 of FIG. 2;

FIG. 6 is a schematic view of an individual part of FIG. 2 at step S50;

FIG. 7 is a schematic view of a flanging negative-angle integral forming die (not matched) provided by the invention;

FIG. 8 is a schematic view of the flanging negative-angle integrally-forming die (die assembly) in FIG. 7;

FIG. 9 is a perspective view of the lower die of FIG. 7;

FIG. 10 is a perspective view of the upper die of FIG. 7;

fig. 11 is a perspective view of the slide insert of fig. 7 engaged with the upper die core.

The reference numbers illustrate:

the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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 invention.

It should be noted that, if directional indication is referred to in the embodiment of the present invention, the directional indication is only used for explaining a relative positional relationship, a motion situation, and the like between the components in a certain posture, and if the certain posture is changed, the directional indication is changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, technical solutions between the embodiments may be combined with each other, but must be based on the realization of the technical solutions by a person skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

In the stamping process of automobile plates, a white automobile body needs three-four hundred stamping parts, and the stamping part shape is various, and for satisfying the welding assembly demand, the design of punching press part has characteristics such as turn-ups, hole and need satisfy intensity and need possess the function such as installation dodge again, and this just leads to many part structural design complicacies, and face of weld or installation face have a plurality of direction negative angles, just need very many processes to accomplish for solving this type of problem punching press technology, and traditional forming method is at the self-welding limit first side the second side, two negative angle characteristics need different processes and different moulds to accomplish respectively, not only increase mould frock development cost, structural the inconvenient problem of getting that still need consider the negative angle and lead to.

In view of the above, the invention provides a method for stamping a negative-angle part and a flanging negative-angle integral forming die, which realize synchronous completion of a plurality of stamping steps through the flanging negative-angle integral forming die, reduce the process steps of stamping the negative-angle part, and reduce the processing and manufacturing cost of the die. Fig. 2 to 6 show an embodiment of the stamping method for a negative-angle part provided by the invention. Fig. 7 to 11 are embodiments of the flanging negative-angle integral forming die provided by the invention.

Referring to fig. 1, the negative-angle component of the present invention includes a first side edge 201, a second side edge 202, and a self-welding edge 203 connected to the second side edge 202, wherein negative-angle features are formed on both the first side edge 201 and the second side edge 202.

In order to realize the punch forming of the negative angle part, please refer to fig. 2, the negative angle part punching method provided by the invention comprises the following steps:

s10: providing a plate;

s20: blanking and punching: forming the sheet material into a sheet-like first connected part, wherein the first connected part comprises two connected individual parts;

s30: one-time flanging forming: flanging the first connected part to form two self-welding edges 203 correspondingly positioned on the two individual parts so as to form a second connected part;

S40: secondary flanging and primary negative angle forming: flanging the second connected part to form two first side edges 201 and two second side edges 202 which are correspondingly positioned on the two individual parts, and respectively forming the negative angle characteristics on the two first side edges 201 to form a third connected part;

s50: trimming and punching: punching the third one-piece part for the second time, and dividing the third one-piece part into two individual parts;

s60: shaping and secondary negative angle forming: shaping each of the individual parts to form the negative angle feature on the second side 202 of each of the individual parts, respectively, to obtain a finished workpiece.

Referring to fig. 2 to 6, in the technical scheme of the invention, two finished workpieces are finally obtained by a sheet through the steps of blanking and punching, primary flanging and forming, secondary flanging and primary negative angle forming, trimming and punching, shaping and secondary negative angle forming, before the step of trimming and punching, two individual parts are connected and stacked in the left-right direction, the two individual parts are separated through the step of trimming and punching, the production efficiency is higher, the corresponding part processing is completed through a set of die tooling in each step, wherein in the step of secondary flanging and primary negative angle forming, in each individual part, not only the first side 201 and the second side can be synchronously flanged and erected, but also the forming of the negative angle characteristic on the first side 201 is completed, so the complex process of stamping the part with the negative angle is reduced, the steps of secondary flanging and primary negative angle forming can be completed by designing a set of die tooling, so that the number of dies involved in the whole stamping step is reduced, and the development cost of the dies is reduced.

Specifically, in the steps of shaping and secondary negative angle forming, when two individual parts move to the corresponding shaping station together, the stamping direction of a die on the shaping station is rotated to adapt to the parts, and after actions are completed, an operator takes the two individual parts out of the die respectively along the left direction and the right direction to complete part manufacturing.

In order to realize the processing steps of secondary flanging and primary negative angle forming, please refer to fig. 7 to 10, the invention further provides a flanging negative angle integral forming die 100, which comprises a lower die 1, an upper die 2 and a negative angle forming structure, wherein the lower die 1 comprises a lower die fixing seat 11 and a lower die material supporting core 113, a containing channel extending along the vertical direction is arranged in the middle of the upper end surface of the lower die fixing seat 11, and the lower die material supporting core 113 is movably mounted into the containing channel along the vertical direction; the upper die 2 comprises an upper die plate 21 movably mounted in the vertical direction, and an upper die core 22 is arranged in the middle of the lower end face of the upper die plate 21 corresponding to the lower die material supporting core 113; the negative angle forming structure comprises two sliding inserts 31 which are respectively arranged at the left side and the right side of the upper die core 22, and the two sliding inserts 31 can move up and down and left and right relative to the upper die core 22; when the die is closed, the lower ends of the two sliding inserts 31 abut against the lower die material supporting core 113, the upper die plate 21 moves downwards, the two sliding inserts 31 and the lower die material supporting core 113 move downwards together in a pressing mode, the lower ends of the two sliding inserts 31 extend into the accommodating channel and move left and right to abut against the inner wall of the accommodating channel, the upper die plate 21 continues to move downwards, the upper die material core 22 is driven to be flush with the lower end faces of the two sliding inserts 31 downwards, and therefore the two sliding inserts 31, the upper die material core 22 and the lower die material supporting core 113 act together to form a third connected part.

In the technical scheme of the invention, a second conjoined part obtained in the step S30 in the stamping method for a part with a negative angle is placed on a lower die, in an initial state, the middle part of the second conjoined part is placed on the lower die holding core 113, two ends of the second conjoined part respectively pass through the accommodating channel to be lapped on the lower die fixing seat 11, in the process of falling of the upper die material core 22, the lower die holding core 113 slowly moves downwards, meanwhile, the lower ends of the two sliding inserts 31 are kept to be abutted against the lower die holding core 113, that is, the two conjoined parts can be pressed, at this time, the two sliding inserts 31 simultaneously generate up-and-down displacement and left-and-right displacement relative to the upper die material core 22, when the sliding inserts 31 mutually deviate to move to be abutted against the inner wall of the accommodating channel, the left-and right-way relative displacement reaches the maximum, at this time, an inclined stamping surface is formed on the part, the upper die plate 21 continues to drive the upper die core 22 to move downwards until the lower end faces of the two sliding inserts 31 are flush with each other, and at this time, the upper die plate 21, the two sliding inserts 31 and the lower die material supporting core 113 always move at the same speed, fall together to complete the vertical face flanging action, and form a negative angle characteristic together with an inclined punching surface.

Further, in the mold closing process, the upper mold 2 moves downward to drive the related components to move downward, and in order to facilitate the linkage between the two sliding inserts 31 and the upper mold, in this embodiment, the upper mold core 22 has two installation side surfaces 221 opposite to each other in the left-right direction, and both the two installation side surfaces 221 incline to the center of the upper mold core 22 from top to bottom; the two sliding inserts 31 can be slidably mounted on the two mounting side surfaces 221 along the up and down directions. With the arrangement, the mounting side surface 221 and the sliding inserts 31 are in inclined surface fit, in the falling process of the upper die core 22, due to the effect of the inclined surface fit, the two sliding inserts 31 move back to complete the displacement in the left-right direction, when the upper die core 22 continues to move downwards, the two sliding inserts 31 and the mounting side surface 221 slide to a large displacement position, at this time, the upper ends of the two sliding inserts 31 abut against the upper die plate 21, and can continue to move downwards under the pushing of the upper die plate 21, so that the two sliding inserts 31, the upper die core 22 and the upper die plate 21 form linkage, and the control of die assembly is facilitated.

For the sliding guidance between the two sliding inserts 31 and the two mounting side surfaces 221, sliding grooves 2211 extending along the oblique direction of the two mounting side surfaces 221 are respectively arranged on the two mounting side surfaces; the two sliding inserts 31 are provided with a projection 311 corresponding to the sliding slot 2211, and the projection 311 is in sliding fit with the sliding slot 2211. In the embodiment, please refer to fig. 11, upward along the left and right sides, the sliding slot 2211 is arranged in steps to form two slot segments arranged in sequence, the slot segment near the center side is a regular strip shape, which mainly plays a role of guiding, the slot segment far from the center is arranged in a dovetail groove to prevent the sliding insert 31 from separating from the installation side 221 in the process of sliding from the left and right sides, and the protrusion 311 is arranged corresponding to the shape to ensure the stability of the linkage motion.

It should be noted that, in other embodiments of the present invention, the inclined guide posts may be disposed on the upper die plate 21, and the corresponding inclined guide holes are disposed on the two sliding inserts 31 to complete the left-right displacement driving, which will not be described in detail herein.

Furthermore, in the embodiment of the present invention, two sliding inserts 31 are elastically connected to the upper die plate 21, and the elastic connection is used for facilitating the adaptation in the linkage process and buffering the conversion of different motion states of the two sliding inserts 31.

The invention does not limit the specific manner of elastic connection, in an embodiment, the lower end surface of the upper mold plate 21 is concavely provided with two spring slots 211, and the two spring slots 211 are respectively arranged at the left side and the right side of the upper mold core 22; compression springs 4 are respectively arranged between the upper die plate 21 and the two sliding inserts 31, and two ends of each compression spring 4 are respectively fixed with the upper bottom surface of the corresponding spring groove 211 and the upper end surface of the corresponding sliding insert 31. When the die is closed, the compression spring 4 is compressed and completely accommodated in the spring groove 211, so that the function of the upper die 2 and the lower die 1 is not influenced when the upper die and the lower die are separated, the stroke of pressing down the upper die 2 when the die is closed is not influenced, and parts are attached to each other along the vertical direction when the die is closed.

Before the steps of secondary flanging and primary negative angle forming, the forming of the self-welding edge 203 is completed, and in order to prevent interference between the self-welding edge 203 and the die in the process of flanging the elevation of the second side 202, in an embodiment of the present invention, an avoidance groove 312 is provided at a lower end of a side surface of each sliding insert 31, which is away from the upper die core 22, and the avoidance groove 312 is used for accommodating the flanged self-welding edge 203. So that when the second side 202 facade is turned over, the self-welding edge 203 is bent along with the self-welding edge and accommodated in the avoiding groove 312, and the sliding insert 31 is prevented from rubbing and changing the shape of the self-welding edge 203.

In order to realize the vertical surface flanging, please refer to fig. 9 again, the lower die fixing plate includes a plate body 111 and a flanging insert set, and a through hole is formed in the middle of the plate body 111; the flanging insert group comprises two first flanging inserts 112a and two second flanging inserts 112b which are positioned on the upper end surface of the plate body 111 and on the periphery of the through hole, the two first flanging inserts 112a are oppositely arranged along the left-right direction, the two second flanging inserts 112b are positioned between the two first flanging inserts 112a, the two second flanging inserts 112b and the two first flanging inserts 112a jointly enclose to form the accommodating channel, and the accommodating channel is communicated with the through hole; wherein, at least part of the outer wall surface of the lower die material supporting core 113 is abutted against the through hole. The through holes are arranged so that the lower die supporting core 113 can extend into the through holes in the process of sliding up and down, the moving stroke is not limited, meanwhile, the inner diameter of the through holes and the outer diameter of the lower die supporting core 113 can be matched for sliding guiding, the two first flanging inserts 112a are used for forming a height difference between the lower die supporting core 113 to complete vertical flanging of the first side edge 201, the two second flanging inserts 112b are positioned on the same side and used for forming a height difference between the lower die supporting core 113 to vertically flange the two second side edges 202 so as to form flanging forming of two symmetrical individual parts.

In addition, in this embodiment, a lower die cushion plate is further disposed between the plate body 111 and the flanging insert block set, and is used for adjusting the overall height of the flanging negative-angle integrally-formed die 100 during die assembly, so as to adapt to corresponding stamping equipment.

Based on the above embodiment, in order to control the flanging degree and the angle of the negative angle characteristic, please refer to fig. 7 again, the opposite side surfaces of the two first flanging inserts 112a are provided with positioning slots 1121, the upper ends of the two positioning slots 1121 are both arranged to penetrate through the corresponding first flanging inserts 112a, and the opposite wall surfaces of the two positioning slots 1121 and the two second flanging inserts 112b jointly enclose to form the accommodating channel; the lower ends of the two slide inserts 31 are used for abutting against the lower wall surfaces of the two positioning grooves 1121 when the mold is closed, and the side surfaces of the two slide inserts 31 departing from each other abut against the opposite side surfaces of the two positioning grooves 1121. At this time, it can be determined that the upper platen 21 has fallen to the maximum displacement, and the two slide inserts 31 have moved to the left and right to the maximum displacement, which facilitates positioning of the relevant parts in the mold clamping state.

Referring to fig. 10, two connecting surfaces are formed on the lower end surfaces of the two sliding inserts 31 in the left-right direction, the connecting surface near the center is horizontally disposed, the connecting surface near the outer edge is inclined from top to bottom toward the upper mold core 22, correspondingly, a cavity with a downward recess is formed on the upper end surface of the lower mold core 113, the middle part of the cavity is horizontally disposed, and the end parts are correspondingly inclined, so that when the two sliding inserts 31 slide to the left and right sides, slope guiding and step positioning can be performed, and the structure can be arranged in cooperation with the positioning groove 1121, or can be separately arranged according to actual requirements.

Furthermore, in order to facilitate matching the shape of the negative-angle part, the structure of the opposite side surfaces of the upper die core 22 and the lower die core 113 can be adjusted to avoid or further process the punching hole of the part during the downward punching process of the upper die plate 21.

It should be noted that the upper end surface of the lower die core 113 is flush with the lower end surface of the positioning slot 1121 when the dies are closed, and the upper end surface of the lower die core 113 moves to be flush with the upper end surface of the first flanging insert 112a when the dies are separated. The first burring insert 112a and the two second burring inserts 112b have the same height.

In order to facilitate the mold closing and positioning between the upper mold 2 and the lower mold, in an embodiment of the present invention, a limiting protrusion 114 is disposed on an upper end surface of the lower mold fixing seat 11, and the limiting protrusion 114 is located on a peripheral side of the accommodating channel; the lower end face of the upper template 21 is provided with a limiting groove corresponding to the limiting bump 114, and the limiting groove is used for being in insertion fit with the limiting bump 114 during mold closing. The structure is simple, and the positioning during die assembly is convenient.

In addition, in this embodiment, an upper die pad is further disposed between the upper die plate 21 and the upper die core 22, and is used for adjusting the overall height of the flanging negative-angle integral forming die 100 during die assembly, so as to adapt to corresponding stamping equipment.

Further, in order to realize the up-and-down movement of the lower mold material supporting core 113, in an embodiment of the present invention, the flanging negative-angle integral forming mold 100 further includes a push rod 5, the push rod 5 is located in the accommodating channel, an upper end of the push rod 5 is fixedly connected with a lower end surface of the lower mold material supporting core 113, and a lower end of the push rod 5 is used for connecting a hydraulic cylinder. The push rod 5 is driven to lift through a hydraulic cylinder so as to drive the lower die material supporting core 113 to lift.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The utility model provides a take negative angle part stamping method, take negative angle part include first side, second side and connect in the self-welding limit on the second side, all be formed with the negative angle characteristic on first side and the second side, its characterized in that, take negative angle part stamping method includes following step:

providing a plate;

shaping and secondary negative angle forming: shaping each individual part to form the negative angle feature on a second side edge of each individual part respectively to obtain a finished workpiece;

in the steps of shaping and secondary negative angle forming, when two individual parts are moved to corresponding shaping stations together, the stamping direction of a die on the shaping stations is rotated to adapt to the parts, and after actions are finished, an operator takes out two finished workpieces from the die along two opposite directions respectively;

in the step of secondary turn-ups and the shaping of a negative angle, carry out the processing of third disjunctor part through turn-ups negative angle integrated into one piece mould, turn-ups negative angle integrated into one piece mould includes:

the upper die comprises an upper die plate movably mounted in the vertical direction, and an upper die material core is arranged in the middle of the lower end surface of the upper die plate and corresponds to the lower die material supporting core; and the number of the first and second groups,

2. The method for stamping a negative-angle part according to claim 1, wherein the upper die core has two opposite mounting sides in the left-right direction, and both of the mounting sides are inclined from top to bottom toward the center of the upper die core;

the two sliding insert blocks can be installed on the two installation side surfaces in a sliding mode along the up and down direction.

3. The method of stamping a negative-angle part as claimed in claim 2, wherein the two mounting sides are each provided with a runner extending in an oblique direction thereof;

the two sliding insert blocks are provided with convex blocks corresponding to the sliding grooves, and the convex blocks are in sliding fit with the sliding grooves.

4. The method for stamping a part with a negative angle as claimed in claim 1, wherein the lower end surface of the upper die plate is concavely provided with two spring grooves which are respectively arranged at the left side and the right side of the upper die core;

5. The method for stamping a part with a negative angle as claimed in claim 1, wherein the lower end of the side surface of each sliding insert away from the upper die core is provided with an avoiding groove, and the avoiding groove is used for accommodating a self-welding edge after flanging.

6. The method of stamping a negative-angle part as recited in claim 1, wherein the lower die holding plate comprises:

the flanging insert group comprises two first flanging inserts and two second flanging inserts which are positioned on the upper end surface of the plate body and positioned on the periphery of the through hole, the two first flanging inserts are oppositely arranged along the left-right direction, the two second flanging inserts are positioned between the two first flanging inserts, the two second flanging inserts and the two first flanging inserts are jointly enclosed to form the accommodating channel, and the accommodating channel is communicated with the through hole;

wherein, at least partial outer wall surface of the lower die material supporting core is propped against the through hole.

7. The method for stamping a part with a negative angle as claimed in claim 6, wherein positioning grooves are formed in opposite side surfaces of the two first flanging inserts, the upper ends of the two positioning grooves are arranged to penetrate through the corresponding first flanging inserts, and the opposite wall surfaces of the two positioning grooves and the two second flanging inserts jointly enclose to form the accommodating channel;

8. The method for stamping a part with a negative angle as claimed in claim 1, wherein a limiting bump is arranged on the upper end surface of the lower die fixing seat, and the limiting bump is positioned on the periphery side of the accommodating channel;

9. The method for stamping a negative-angle part as claimed in claim 1, wherein the flanging negative-angle integral forming die further comprises a top bar, the top bar is located in the accommodating channel, the upper end of the top bar is fixedly connected with the lower end face of the lower die supporting core, and the lower end of the top bar is used for connecting a hydraulic cylinder.