CN108043962B

CN108043962B - Bending forming mechanism

Info

Publication number: CN108043962B
Application number: CN201711227875.5A
Authority: CN
Inventors: 张波; 丛富强; 吕正涛; 蒋勇
Original assignee: Alai Technology (suzhou) Co Ltd
Current assignee: Alai Technology (suzhou) Co Ltd
Priority date: 2017-11-29
Filing date: 2017-11-29
Publication date: 2020-02-18
Anticipated expiration: 2037-11-29
Also published as: CN108043962A

Abstract

A bending forming mechanism comprises an upper die and a lower die, wherein a primary bending punch is arranged on the upper die, a primary bending boss matched with the primary bending punch for use is arranged on the lower die, and the primary bending punch bends the edge of a metal flat plate placed on the primary bending boss; the metal flat plate bending die is characterized in that a secondary bending punch is arranged on the upper die, a secondary bending boss matched with the secondary bending punch for use is arranged on the lower die, the secondary bending punch is provided with a right-angle-shaped secondary bending groove, the secondary bending groove comprises a vertical wall and a horizontal wall, the horizontal wall is located above the vertical wall, the vertical wall is used for cutting the outer side wall of the bent part of the metal flat plate, the horizontal wall is used for downwards extruding the end part of the upwards bent part of the metal flat plate, the round angle formed by flanging is reduced, and further the stress at the flanging part is reduced.

Description

Bending forming mechanism

Technical Field

The invention relates to production and processing equipment, in particular to a bending and forming mechanism for a plate.

Background

The edge of a metal flat plate needs to be bent, so that the angle of the bent part is not too large in order to avoid generating excessive stress.

Disclosure of Invention

The technical problems solved by the invention are as follows: how to reduce the bending angle of the edge of the metal flat plate.

In order to solve the technical problems, the invention provides the following technical scheme: a bending forming mechanism comprises an upper die and a lower die, wherein a primary bending punch is arranged on the upper die, a primary bending boss matched with the primary bending punch for use is arranged on the lower die, and the primary bending punch bends the edge of a metal flat plate placed on the primary bending boss; the metal flat plate bending die is characterized in that a secondary bending punch is arranged on the upper die, a secondary bending boss matched with the secondary bending punch for use is arranged on the lower die, the secondary bending punch is provided with a right-angle secondary bending groove, the secondary bending groove comprises a vertical wall and a horizontal wall, the horizontal wall is located above the vertical wall, the vertical wall is used for cutting the outer side wall of a bent part of a metal flat plate, and the horizontal wall is used for downwards extruding the end part of the bent part of the metal flat plate.

According to the technical scheme, the die is assembled from top to bottom, the first-time bending punch bends the edge of the metal flat plate placed on the first-time bending boss downwards, and the angle of the round corner at the bending position is large. And then, inverting the bent metal flat plate and placing the bent metal flat plate on the re-bending boss, enabling the bent part of the metal flat plate to be upward, enabling the re-bending punch to move downwards, cutting off one layer of the outer part of the bent part by the vertical wall to enable the bent part to be thin, enabling the horizontal wall to act on the top of the bent part from top to bottom and downwards extruding the top of the bent part, and therefore the angle of a fillet at the bent part of the metal flat plate is reduced.

The metal flat plate is a square plate, one corner of the metal flat plate is a round corner, and the first bending punch and the first bending boss which are used in a matched mode simultaneously bend four side edges of the metal flat plate for the first time; and the re-bending punch and the re-bending boss which are used in a matched mode simultaneously carry out re-processing on the four side edges of the metal flat plate. The bending forming mechanism provided by the invention is used for flanging the whole edge of the metal flat plate.

The first bending punch and the second bending punch are arranged on the upper die in parallel; the first bending punch bends the edge of the metal flat plate ninety degrees downwards; and the metal flat plate processed by the first bending punch is reversely arranged on the secondary bending boss. According to the design, the die is vertically assembled, the first bending punch bends the first metal flat plate for the first time, and the second bending punch processes the bent second metal flat plate for the second time, so that the bending can be simultaneously carried out, and the processing efficiency is improved.

The upper die comprises an upper die assembly and an upper stripping plate, and the upper stripping plate is elastically arranged on the upper die assembly;

a first bending lower pressing block is embedded on the upper stripping plate and corresponds to the first bending boss up and down;

the upper stripping plate is provided with a first-time bending punch through hole, the first-time bending punch is mounted on the upper die assembly and extends downwards into the first-time bending punch through hole, the first-time bending punch is hollow, and the first-time bending lower pressing block is located in the hollow part of the first-time bending punch;

the lower die comprises a lower die assembly and a lower die plate, and the lower die plate is arranged on the lower die assembly;

the first-time bending boss is embedded on the lower template, a sinking type first groove is formed in the periphery of the first-time bending boss, and the first-time bending punch and the sinking type first groove are arranged in an up-and-down corresponding mode.

According to the design, the upper die and the lower die are assembled, the first bending lower pressing block moving downwards along with the upper stripper plate is pressed on the metal flat plate, the metal flat plate is flatly placed on the first bending boss, and the first bending lower pressing block and the first bending boss protrude out of the periphery of the four sides of the metal flat plate. And then, the upper stripper plate and the first-time bending lower pressing block ascend relative to the lower die assembly, the first-time bending punch protrudes downwards out of the first-time bending punch through hole to bend the periphery of four sides of the metal flat plate downwards, the bent part of the metal flat plate is flatly attached to four side walls of the first-time bending boss downwards, and the first-time bending punch extends into the sunken first groove downwards.

A secondary bending lower pressing block is embedded on the upper stripping plate and corresponds to the secondary bending boss up and down;

the upper stripping plate is provided with a re-bending punch through hole, the re-bending punch is installed on the upper die assembly and extends downwards into the re-bending punch through hole, the re-bending punch is hollow, and the re-bending lower pressing block is positioned in the hollow part of the re-bending punch;

the secondary bending boss is embedded on the lower template, a sunken second groove is formed around the secondary bending boss, and the secondary bending punch and the sunken second groove are arranged in an up-and-down corresponding mode;

the re-bending groove is close to the side wall of the re-bending lower pressing block.

According to the design, the bent metal flat plate is placed on the re-bending boss, and the bent part of the metal flat plate faces upwards. And (3) closing the upper die and the lower die, pressing the re-bent lower pressing block moving downwards along with the upper stripper plate against the metal flat plate, and tightly attaching the bent parts on the four sides of the metal flat plate to the peripheral side wall of the re-bent lower pressing block. And then, the upper stripper plate and the lower re-bending press block ascend relative to the lower die assembly, the re-bending punch protrudes downwards out of the re-bending punch through hole, the vertical wall of the re-bending punch penetrates through the outer side wall of the bent part of the metal flat plate, the horizontal wall presses the top of the bent part of the metal flat plate downwards, the bent part deforms, a round angle formed by bending between the bent part and the main part of the metal flat plate is reduced, and the re-bending punch extends into the sunken second groove downwards.

The secondary bending punch is in a split type design and is formed by splicing a left side punch, a right side punch, a front side punch and a rear side punch. Compared with an integrated punch and a split punch, the split punch has no possibility of stress deformation among all components of the punch so as to improve the processing quality.

The bending forming mechanism can be used for flanging a metal flat plate and then carrying out secondary treatment on the flanging part subjected to flanging, so that a round angle formed by flanging is reduced, and further, the stress at the flanging position is reduced.

Drawings

The invention is further described below with reference to the accompanying drawings:

FIG. 1 is a schematic view of a bend forming mechanism according to the present invention;

FIG. 2 is a schematic view of the upper mold and the lower mold of the bending mechanism shown in FIG. 1 when they are closed;

FIG. 3 is an enlarged view taken at A in FIG. 2;

FIG. 4 is an enlarged view of FIG. 2 at B;

FIG. 5 is a schematic view of the upper clamp plate;

FIG. 6 is a schematic view of an upper stripper plate;

FIG. 7 is a schematic view of the lower platen;

FIG. 8 is a schematic view of a first bending punch;

FIG. 9 is a top view of FIG. 8;

FIG. 10 is a schematic view of a front punch re-bending the punch;

FIG. 11 is a top view of FIG. 10;

FIG. 12 is a schematic view of a rear punch of the re-bending punch;

FIG. 13 is a top view of FIG. 12;

FIG. 14 is a schematic view of a left punch re-bending the punch;

FIG. 15 is a top view of FIG. 14;

FIG. 16 is a schematic view of the right punch of the re-bending punch;

FIG. 17 is a top view of FIG. 16;

FIG. 18 is a schematic view of the first-time bent boss 21 of FIG. 1 flanged to a metal plate 300;

FIG. 19 is a bottom view of FIG. 18;

fig. 20 is a schematic view of the metal plate 300 flanged on the re-bending boss 22 in fig. 1.

The symbols in the drawings illustrate that:

10. an upper die; 11. bending the punch for the first time; 12. bending the punch again; 121. a left punch; 122. a right punch; 123. a front side punch; 124. punching the rear side; 13. an upper stripping plate; 131. bending the punch for the first time to punch holes; 132. bending the punch hole again; 14. bending the lower pressing block for the first time; 141. a first equal height sleeve; 15. bending the lower pressing block again; 151. a second equal-height sleeve; 161. an upper die holder; 162. an upper base plate; 163. an upper splint; 164. the upper clamping plate is provided with a groove for mounting the re-bending punch;

20. a lower die; 21. bending the boss for the first time; 22. bending the boss again; 220. bending the groove again; 221. a vertical wall; 222. a horizontal wall; 223. stamping the groove again; 224. stamping the side wall of the groove again; 225. stamping the top wall of the groove again; 23. a lower template; 231. a sunken first groove; 232. a sunken second groove; 241. a lower die holder; 242. a lower base plate;

300. a flanged metal flat plate; 30. a metal plate main body portion; 31. a bending part; 311. the top of the bent portion; 32. and a round angle formed between the bending part and the metal flat plate main body part due to bending.

Detailed Description

Referring to fig. 1 and 2, a bending forming mechanism includes an upper die 10 and a lower die 20.

Referring to fig. 1 to 4, the upper mold 10 includes an upper mold assembly and an upper stripper 13, wherein the upper mold assembly includes an upper mold base 161, an upper backing plate 162 mounted on the upper mold base, and an upper clamping plate 163 mounted on the upper backing plate.

Go up to take off the board and inlay and have the briquetting 14 down of bending for the first time, the briquetting down of bending for the first time through first elastic connection subassembly with punch holder 163 elastic connection. First elastic connection subassembly includes first waiting for high sleeve 141, inserts first threaded connection spare of establishing in first waiting for high sleeve, sets up bend down the briquetting for the first time with first spring between the punch holder, first waiting for high sleeve inserts and establishes in the punch holder 163, the stub end of first threaded connection spare upwards outstanding the top of first waiting for high sleeve 141 to support and press on the top surface of punch holder, first threaded connection spare's threaded end is outstanding downwards the bottom of first waiting for high sleeve 141, and is connected and is in bend down on the briquetting for the first time.

Referring to fig. 8 and 9, a first bending punch 11 is installed on the upper clamping plate 163, a first bending punch through hole 131 is formed in the upper stripper plate 13, the first bending punch 11 extends downwards into the first bending punch through hole, the first bending punch is hollow, and the first bending lower pressing block is located in the hollow portion of the first bending punch.

Go up to take off board 13 and inlay and have the briquetting 15 of bending down again, the briquetting of bending down again pass through second elastic connection subassembly with punch holder 163 elastic connection. The second elastic connecting assembly comprises a second equal-height sleeve 151, a second threaded connecting piece inserted into the second equal-height sleeve, and a second spring arranged between the second equal-height pressing block and the upper clamp plate, the second equal-height sleeve is inserted into the upper clamp plate 163 and the upper backing plate 162, the large end of the second threaded connecting piece protrudes upwards from the top end of the second equal-height sleeve 151 and abuts against the top surface of the upper backing plate 162, and the threaded end of the second threaded connecting piece protrudes downwards from the bottom end of the second equal-height sleeve 151 and is connected to the second equal-height pressing block which is bent again.

The upper backing plate 162 is provided with a re-bending punch 12, the upper clamping plate 163 and the upper stripper plate 13 are provided with a re-bending punch through hole 132, the re-bending punch 12 extends downwards into the re-bending punch through hole, the re-bending punch is hollow, and the re-bending lower pressing block is located in the hollow part of the re-bending punch.

With reference to fig. 3, 10 to 17, the re-bending punch 12 is of a split design, and the re-bending punch is formed by splicing a left punch 121, a right punch 122, a front punch 123 and a rear punch 124.

Referring to fig. 4 and 15, the re-bending punch is provided with a right-angled re-punching groove 223 and a right-angled re-bending groove 220. The redraw recess includes vertical side walls 224 and a horizontal top wall 225, which is above the side walls. The re-entrant groove comprises a vertical wall 221 and a horizontal wall 222, the horizontal wall being located above the vertical wall. The vertical wall and the top wall form a step of ninety degrees. The vertical wall is used for cutting the outer side wall of the bent part of the metal flat plate, and the horizontal wall is used for downwards extruding the end part of the upward bent part of the metal flat plate. Wherein the re-bending groove 220 is adjacent to the side wall of the re-bending lower pressing block 15.

Referring to fig. 1 and 2, the upper stripper plate 13 is elastically connected to the upper clamp plate 163 through a third elastic connection assembly. Third elasticity coupling assembling includes the third sleeve of waiting for the height, inserts and establish third threaded connection spare in the third sleeve of waiting for the height, sets up on take off the board with third spring between the punch holder, the third sleeve of waiting for the height is inserted and is established punch holder 163 with in the upper padding plate 162, the big end of third threaded connection spare upwards outstanding the top of the third sleeve of waiting for the height to support and press on the top surface of upper padding plate 162, the threaded end of third threaded connection spare is outstanding downwards the bottom of the third sleeve of waiting for the height is connected and is connected on taking off the board.

The lower die 20 comprises a lower die base 241, a lower backing plate 242 mounted on the lower die base, and a lower die plate 23 mounted on the lower backing plate.

Referring to fig. 8, a first bending boss 21 is embedded in the lower template 23, and a first sinking groove 231 is formed around the first bending boss. The first-bending lower pressing block 14 and the first-bending boss 21 are arranged in an up-and-down corresponding mode; the first bending punch 11 and the sinking type first groove are arranged in an up-and-down corresponding mode.

Referring to fig. 1, a re-bending boss 22 is inlaid in the lower template 23, and a sunken second groove 232 is formed around the re-bending boss. The secondary bending lower pressing block and the secondary bending boss 22 are arranged in an up-and-down corresponding mode; the secondary bending punch and the sinking type second groove are arranged in an up-and-down corresponding mode.

In actual operation, referring to fig. 18 and 19, the metal flat plate to be flanged is a square plate, one corner of the metal flat plate is a rounded corner, and the first bending punch 11 and the first bending boss 21 which are used in cooperation are used for simultaneously bending four side edges of the metal flat plate for the first time. The first bending punch bends the edge of the metal flat plate ninety degrees downwards.

Referring to fig. 4, 15 and 20, the metal plate processed by the first bending punch is inverted on the re-bending boss 22. The re-bending punch 12 and the re-bending boss 22 used in cooperation simultaneously re-process the four side edges of the flat metal plate. Specifically, the re-punching groove 223 and the re-bending groove 220 of the re-bending punch 12 are engaged, the outer side wall of the bent portion of the flat metal plate is cut first, and the top 311 of the bent portion of the flat metal plate is pressed downward, and the bent portion is deformed, so that the round angle 32 formed by bending between the bent portion 31 and the main body portion 30 of the flat metal plate becomes small.

The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description herein, since various changes and modifications can be made in the details of the embodiment and the application range according to the spirit of the present invention.

Claims

1. A bending forming mechanism comprises an upper die (10) and a lower die (20), wherein a first bending punch (11) is arranged on the upper die, a first bending boss (21) matched with the first bending punch for use is arranged on the lower die, and the first bending punch bends the edge of a metal flat plate placed on the first bending boss; the method is characterized in that: the metal flat plate bending device is characterized in that a re-bending punch (12) is arranged on the upper die, a re-bending boss (22) matched with the re-bending punch for use is arranged on the lower die, the re-bending punch is provided with a right-angle re-bending groove (220), the re-bending groove comprises a vertical wall (221) and a horizontal wall (222), the horizontal wall is located above the vertical wall, the vertical wall is used for cutting the outer side wall of a bent part of a metal flat plate, and the horizontal wall is used for downwards extruding the end part of the bent part of the metal flat plate; the cutting of the outer side wall of the bent part of the metal flat plate and the extrusion of the end part of the upward bent part of the metal flat plate are completed at one time.

2. The bend forming mechanism of claim 1, wherein: the metal flat plate is a square plate, one corner of the metal flat plate is a round corner, and the first bending punch (11) and the first bending boss (21) which are used in a matched mode simultaneously bend four side edges of the metal flat plate for the first time;

the re-bending punch (12) and the re-bending boss (22) which are used in a matched mode simultaneously carry out re-processing on four side edges of the metal flat plate.

3. The bend forming mechanism of claim 1, wherein: the primary bending punch (11) and the secondary bending punch (12) are arranged on the upper die (10) in parallel;

the first bending punch bends the edge of the metal flat plate ninety degrees downwards;

the metal flat plate processed by the first bending punch is reversely arranged on the re-bending boss (22).

4. The bend forming mechanism of claim 1, wherein: the upper die (10) comprises an upper die assembly and an upper stripping plate (13), and the upper stripping plate is elastically mounted on the upper die assembly;

a first-bending lower pressing block (14) is embedded on the upper stripping plate and corresponds to the first-bending boss (21) up and down;

a first-time bending punch through hole (131) is formed in the upper stripping plate, the first-time bending punch (11) is installed on the upper die assembly and extends downwards into the first-time bending punch through hole, the first-time bending punch is hollow, and the first-time bending lower pressing block is located in the hollow part of the first-time bending punch;

the lower die (20) comprises a lower die assembly and a lower template (23), and the lower template is installed on the lower die assembly;

the primary bending boss (21) is embedded on the lower template, a sinking type first groove (231) is arranged around the primary bending boss, and the primary bending punch and the sinking type first groove are arranged in an up-and-down corresponding mode.

5. The bend forming mechanism of claim 1, wherein: the upper die (10) comprises an upper die assembly and an upper stripping plate (13), and the upper stripping plate is elastically mounted on the upper die assembly;

a secondary bending lower pressing block (15) is embedded on the upper stripping plate, and the secondary bending lower pressing block and the secondary bending boss (22) are arranged in an up-and-down corresponding mode;

a re-bending punch through hole (132) is formed in the upper stripping plate, the re-bending punch is mounted on the upper die assembly and extends downwards into the re-bending punch through hole, the re-bending punch is hollow, and the re-bending lower pressing block is located in the hollow part of the re-bending punch;

the secondary bending boss is embedded on the lower template, a sunken second groove (232) is formed around the secondary bending boss, and the secondary bending punch and the sunken second groove are arranged in an up-and-down corresponding mode;

6. The bend forming mechanism of claim 1, wherein: the re-bending punch (12) is in a split type design, and the re-bending punch is formed by splicing a left punch (121), a right punch (122), a front punch (123) and a rear punch (124).