CN114618948B - Forming device and bending forming method - Google Patents

Abstract

A forming device for processing metal or alloy, the forming device including a bending mechanism, the bending mechanism including: the upper die holder and the lower die holder are arranged at intervals; the bending mechanism further comprises a first bending group, a second bending group, a third bending group and a fourth bending group, and the first bending group, the second bending group, the third bending group and the fourth bending group are sequentially arranged between the upper die base and the lower die base to bend the blank. The application also provides a bending forming method, which comprises the following steps: and bending the blank sequentially through the first bending group, the second bending group, the third bending group and the fourth bending group. The blank is bent and formed for multiple times, so that the material is not extruded severely, the material deformation is less, the annealing is not needed in the forming process, the process is reduced, the cost is saved, and the finished product has good mechanical property, high production rate and high material utilization rate, and is particularly suitable for mass production.

Description

Forming device and bending forming method

Technical Field

The application relates to the technical field of bending forming, in particular to a forming device and a bending forming method.

Background

An existing method for processing and forming thick plate gold materials adopts cold forging and pressing forming of a cold forging die to realize blank to a formed part, and then cutting and processing the formed part to ensure the external dimension. Cold forging and forming are carried out at room temperature, and the blank hardness is high during forming, the forming pressure is high, and large-scale oil pressure bending equipment (oil press with the pressure of more than 3500 tons) is needed, so that higher requirements on die design and manufacturing, equipment pressure requirements and the like are met. Meanwhile, the cold forging and pressing formed product needs annealing treatment to meet the process requirements due to work hardening.

Disclosure of Invention

In view of the foregoing, it is necessary to provide a molding device and a bending molding method, which save the production cost.

An embodiment of the present application provides a forming device for processing a metal or alloy blank, the forming device including a bending mechanism including: the upper die holder and the lower die holder are arranged at intervals;

the bending mechanism further comprises a first bending group, a second bending group, a third bending group and a fourth bending group, and the first bending group, the second bending group, the third bending group and the fourth bending group are sequentially arranged between the upper die holder and the lower die holder to bend blanks;

the first bending group is used for bending the blank to form a first angle;

the second bending group is used for bending the blank at the first angle to form a second angle;

the third bending group is used for bending the blank at the second angle to form a third angle;

the fourth bending group is used for bending the blank at the third angle to form a fourth angle;

the first angle, the second angle, the third angle and the fourth angle are sequentially increased;

the forming device further comprises a forging mechanism, the forging mechanism is arranged between the upper die holder and the lower die holder and extrudes the blank at the fourth angle, the forging mechanism comprises a forging upper pressing block, a forging lower die plate, a forging forming block, a lower cushion block, a lower clamping plate and a forging lower cushion plate, the forging lower die plate is arranged on one side of the upper die holder facing the lower die holder, a first forging forming hole is formed in the forging lower die plate in a penetrating mode, the forging upper pressing block is connected with one side of the upper die holder facing the forging lower die plate and is positioned in the first forging forming hole, the forging forming block is arranged on one side of the lower die holder facing the forging lower die plate, the forging forming block is provided with a second forging forming hole with an opening facing the forging upper pressing block, one end of the lower cushion block is positioned in the first forging forming hole, the lower cushion plate is arranged on one side of the lower die holder facing the forging forming block and is connected with the forging forming block, and the forging lower cushion plate is higher than the forging lower cushion plate;

the first bending group, the second bending group, the third bending group and the fourth bending group all comprise a bending upper die plate, a bending upper pressing block and a bending forming block, the bending upper die plate is arranged on one side of the upper die base towards the lower die base, the bending upper die plate is provided with a bending forming hole with an opening towards the lower die base, the bending upper pressing block is connected with the bending upper die plate and is positioned in the bending forming hole, the bending forming block is connected with the lower die base and faces the bending upper pressing block, the bending upper die plate, the bending upper pressing block and the bending forming block are matched to be used for sequentially bending blanks, and the bending mechanism further comprises a bending lower base plate which is arranged on one side of the lower die base towards the bending forming block and is connected with the bending forming block.

In some embodiments of the application, the difference in bending angle between the first angle and the second angle, between the second angle and the third angle, and between the third angle and the fourth angle is equal.

In some embodiments of the application, the first angle is 45 °, the second angle is 60 °, the third angle is 75 °, and the fourth angle is 90 °.

The embodiment of the application provides a bending forming method applying any forming device, which comprises the following steps:

bending the blank through a first bending group to form a first angle;

bending the blank at the first angle through a second bending group to form a second angle;

bending the blank at the second angle through a third bending group to form a third angle;

and bending the blank at the third angle through a fourth bending group to form a fourth angle.

In some embodiments of the present application, the bending molding method further comprises at least one of the following (a) and (b):

(a) The method comprises the steps of preprocessing the edge of a blank before bending the blank for a plurality of times;

(b) After the blank is bent for a plurality of times, the blank is placed in a forging mechanism to extrude the end part of the blank.

The related equipment needed by the bending forming method using the forming device is easy to meet, the material is not extruded severely during bending forming, the deformation of the material is less, the appearance problem is not easy to occur after the anode is manufactured in the subsequent working procedure, the annealing is not needed in the forming process, the manufacturing process is reduced, the cost is saved, the mechanical property of the manufactured finished product is good, the productivity is high, the material utilization rate is high, the method is suitable for mass production, the strength, the dimensional precision and the surface quality of the formed part are high, most of cutting processing is omitted, and the cost is greatly reduced.

Drawings

Fig. 1 is a structural diagram of a bending mechanism according to an embodiment of the present application.

Fig. 2 is an exploded view of a bending mechanism according to an embodiment of the present application.

Fig. 3 is a schematic structural diagram of a first bending set according to an embodiment of the application.

Fig. 4 is an exploded view of a first bending assembly according to an embodiment of the present application.

Fig. 5 is a schematic structural diagram of a second bending set according to an embodiment of the application.

Fig. 6 is an exploded view of a second bending group according to an embodiment of the present application.

Fig. 7 is a schematic structural diagram of a third bending set according to an embodiment of the application.

Fig. 8 is an exploded view of a third bending group according to an embodiment of the present application.

Fig. 9 is a schematic structural diagram of a fourth bending set according to an embodiment of the present application.

Fig. 10 is an exploded view of a fourth bending group according to an embodiment of the present application.

FIG. 11 is a schematic diagram of a forging mechanism according to an embodiment of the application.

FIG. 12 is an exploded view of a forging mechanism according to an embodiment of the present application.

Fig. 13 is a schematic flow chart of the bending forming method of the present application.

Fig. 14 is a flow chart of the bending forming method of the present application.

Description of the main reference signs

Forming device 100

Blank 10

First portion 101

Second portion 102

Bending mechanism 20

Upper die holder 21

Lower die holder 22

First bending group 23

First upper die plate 231

First upper press block 232

First molding block 233

First shaped aperture 234

First lower backing plate 235

Second bending group 24

Second upper die plate 241

Second upper press block 242

Second forming block 243

Second shaped aperture 244

Second lower backing plate 245

Third bending group 25

Third upper template 251

Third upper press block 252

Third forming block 253

Third forming hole 254

Third lower backing plate 255

Fourth bending group 26

Fourth upper template 261

Fourth upper press block 262

Fourth forming block 263

Fourth shaped aperture 264

Fourth lower backing plate 265

Forging mechanism 30

Forging press block 301

Forging press die plate 302

Forging and pressing forming block 303

Lower cushion block 304

First forge forming hole 305

Second forge forming aperture 306

Lower clamping plate 307

Forging press pad 308

Bending upper die plate 40

Bending upper press block 50

Bending forming block 60

Bending forming hole 70

Bending lower backing plate 80

First angle theta 1

Second angle theta 2

Third angle theta 3

Fourth angle theta 4

The application will be further described in the following detailed description in conjunction with the above-described figures.

Detailed Description

The following description of the technical solutions according to the embodiments of the present application will be given with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments.

It will be understood that when an element is referred to as being "mounted" to another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items. The terms "vertical," "horizontal," "left," "right," "top," "bottom," and the like are used herein for illustrative purposes only and are not intended to limit the application.

It will be appreciated that when describing a parallel/perpendicular arrangement of two components, the angle between the two components allows for a tolerance of + -10% relative to standard parallel/perpendicular.

The embodiment of the application provides a forming device, which comprises a bending mechanism, wherein the bending mechanism comprises: the upper die holder and the lower die holder are arranged at intervals. The bending mechanism further comprises a first bending group, a second bending group, a third bending group and a fourth bending group, wherein the first bending group, the second bending group, the third bending group and the fourth bending group are sequentially arranged between the upper die holder and the lower die holder to bend the blank, the first bending group is used for bending the blank to form a first angle, the second bending group is used for bending the blank which is in the first angle to form a second angle, the third bending group is used for bending the blank which is in the second angle to form a third angle, and the fourth bending group is used for bending the blank which is in the third angle to form a fourth angle.

The blank is a metal or alloy such as aluminum, aluminum alloy, magnesium alloy, etc. The forming device is particularly suitable for bending and forming the aluminum material and the alloy thick material (the thickness is more than 12.0 mm) of the aluminum material by a die.

The first angle means that the blank is bent to form at least a first part and a second part connected with the first part after being acted by the first bending group, and an included angle formed by the second part and the first part is the first angle; the second angle, the third angle and the fourth angle refer to that after the blank forming the first angle is acted by the second bending group, the third bending group and the fourth bending group respectively, bending deformation further occurs so that the included angle between the second part and the first part is changed, and after each bending deformation, the included angle between the second part and the first part is the second angle, the third angle and the fourth angle respectively.

In the forming device, the bending mechanism is adopted to bend and form the blank for multiple times, and compared with the existing one-step forming mode, the deformation of the blank is less each time, so that the blank cannot be extruded severely, annealing is not needed in the forming process, the process procedures can be reduced, and the production cost is saved.

Some embodiments of the application are described in detail below with reference to the accompanying drawings.

Referring to fig. 1 and 2 together, a forming apparatus 100 according to an embodiment of the present application is configured to process a metal or alloy blank 10, where the forming apparatus 100 includes a bending mechanism 20, and the bending mechanism 20 includes: the upper die holder 21 and the lower die holder 22 are arranged at intervals.

The bending mechanism 20 further includes a first bending group 23, a second bending group 24, a third bending group 25, and a fourth bending group 26, where the first bending group 23, the second bending group 24, the third bending group 25, and the fourth bending group 26 are sequentially disposed between the upper die holder 21 and the lower die holder 22 to bend the blank 10.

Referring to fig. 3 and 4, the first bending set 23 is used for bending the blank 10 to form a first angle θ1.

Referring to fig. 5 and 6, the second bending set 24 is used for bending the blank 10 at the first angle θ1 to form a second angle θ2.

Referring to fig. 7 and 8, the third bending set 25 is used for bending the blank 10 at the second angle θ2 to form a third angle θ3.

Referring to fig. 9 and 10 together, the fourth bending set 26 is used for bending the blank 10 at the third angle θ3 to form a fourth angle θ4.

The first angle theta 1, the second angle theta 2, the third angle theta 3 and the fourth angle theta 4 are sequentially increased so as to bend and shape the blank for multiple times. Compared with the existing one-step forming mode, the blank is less in deformation each time, so that the blank is free from severe extrusion, annealing is not needed in the forming process, the process procedures can be reduced, and the production cost is saved.

Referring to fig. 1 and 2, in some embodiments, each of the first bending group 23, the second bending group 24, the third bending group 25, and the fourth bending group 26 includes a bending upper die plate 40, a bending upper press block 50, and a bending forming block 60. The upper bending die plate 40 is provided on one side of the upper die holder 21 facing the lower die holder 22, and the upper bending die plate 40 is provided with a bending hole 70 opened toward the lower die holder 22. The upper bending press 50 is connected to the upper bending die plate 40 and is located in the bending hole 70. The bending block 60 is connected to the lower die holder 22 and faces the bending upper press block 50, and the bending upper die plate 40, the bending upper press block 50 and the bending block 60 are matched to sequentially bend the blank 10.

With continued reference to fig. 3 and 4, in some embodiments, the first fold group 23 includes a first upper die plate 231, a first upper press block 232, and a first forming block 233. The first upper die plate 231 is disposed on a side of the upper die holder 21 facing the lower die holder 22, and the first upper die plate 231 is provided with a first molding hole 234 opening toward the lower die holder 22. The first upper press block 232 is coupled to the first upper die plate 231 and is positioned in the first molding hole 234. The first molding block 233 is connected to the lower die holder 22 and faces the first upper pressing block 232. The first upper die plate 231, the first upper press block 232, and the first forming block 233 cooperate to bend the blank 10 to form a first angle θ1. The first angle θ1 refers to at least a first portion 101 and a second portion 102 connected to the first portion 101 formed by bending the blank 10 for the first time after the blank 10 is matched by the first upper die plate 231, the first upper pressing block 232 and the first forming block 233, and the angle formed by the second portion 102 and the first portion 101 is the first angle θ1.

In the process of bending and forming the blank 10, the first upper pressing block 232 and the first forming block 233 press the blank 10, then the first upper die plate 231 moves downwards under the driving of the upper die holder 21, and the die is closed by matching with the first forming block 233 on the lower die holder 22, so that the blank 10 bent to a first angle theta 1 is obtained.

It will be appreciated that the second bending group 24, the third bending group 25 and the fourth bending group 26 have substantially the same structure as the first bending group 23, and the difference is that, when the blank 10 is bent by the bending mechanism 20 to form the first angle θ1, the blank 10 at the first angle θ1 is bent to form the second angle θ2, the blank 10 at the second angle θ2 is bent to form the third angle θ3, and the blank 10 at the third angle θ3 is bent to form the fourth angle θ4, during the different bending processes, the first upper die plate 231 in the bending mechanism 20 and the corresponding first forming block 233 are matched with each other, and the blank 10 is bent to form the first angle θ1, the second angle θ2, the third angle θ3 and the fourth angle θ4, and the size of the first upper die plate 232 is adaptively changed along with the aperture size of the first forming hole 234 in the first upper die plate 231.

With continued reference to fig. 5 and 6, in some embodiments, the second fold group 24 includes a second upper die plate 241, a second upper press block 242, and a second forming block 243. The second upper die plate 241 is provided on a side of the upper die holder 21 facing the lower die holder 22, and the second upper die plate 241 is provided with a second molding hole 244 opened toward the lower die holder 22. The second upper press block 242 is coupled to the second upper die plate 241 and is positioned in the second molding hole 244. The second molding block 243 is connected to the lower die holder 22 and faces the second upper press block 242. The second upper die plate 241, the second upper press block 242 and the second forming block 243 cooperate to bend the blank 10 to form a second angle θ2. The second angle θ2 is a second angle θ2 formed by the second portion 102 and the first portion 101 after the blank 10 formed by the first angle θ1 is further bent for the second time after being matched by the second upper die plate 241, the second upper pressing block 242 and the second molding block 243.

In the process of bending and forming the blank 10, the second upper pressing block 242 and the second forming block 243 press the blank 10, and then the second upper die plate 241 moves downwards under the drive of the upper die holder 21, and the second forming block 243 on the lower die holder 22 is matched to realize die closure, so that the blank 10 bent to a second angle theta 2 is obtained.

With continued reference to fig. 7 and 8, in some embodiments, the third bending group 25 includes a third upper die plate 251, a third upper press block 252, and a third forming block 253. The third upper die plate 251 is disposed on a side of the upper die holder 21 facing the lower die holder 22, and the third upper die plate 251 is provided with a third molding hole 254 opening toward the lower die holder 22. The third upper press 252 is coupled to the third upper die plate 251 and is positioned in the third molding hole 254. The third forming block 253 is connected with the lower die holder 22 and faces the third upper pressing block 252. The third upper die plate 251, the third upper press block 252 and the third forming block 253 cooperate to bend the blank 10 to form a third angle θ3. The third angle θ3 refers to a third angle θ3 formed by the second portion 102 and the first portion 101 after the blank 10 formed by the second angle θ2 is further bent for the third time after being matched by the third upper die plate 251, the third upper pressing block 252 and the third forming block 253.

In the process of bending and forming the blank 10, the third upper pressing block 252 and the third forming block 253 press the blank 10, then the third upper die plate 251 moves downwards under the driving of the upper die holder 21, and the third forming block 253 on the lower die holder 22 is matched to realize die closure, so that the blank 10 bent to a third angle theta 3 is obtained.

With continued reference to fig. 9 and 10, in some embodiments, the fourth bending group 26 includes a fourth upper die plate 261, a fourth upper press block 262, and a fourth forming block 263. The fourth upper die plate 261 is provided on a side of the upper die holder 21 facing the lower die holder 22, and the fourth upper die plate 261 is provided with a fourth molding hole 264 opening toward the lower die holder 22. The fourth upper press block 262 is coupled to the fourth upper die plate 261 and is positioned in the fourth molding hole 264. The fourth molding block 263 is connected to the lower die holder 22 and faces the fourth upper press block 262. The fourth upper die plate 261, the fourth upper press block 262 and the fourth forming block 263 cooperate to bend the blank 10 to form a fourth angle θ4. The fourth angle θ4 is a fourth angle θ4 formed by the second portion 102 and the first portion 101 after the blank 10 formed by the third angle θ3 is further bent for the fourth time after being matched by the fourth upper die plate 261, the fourth upper pressing block 262 and the fourth forming block 263.

In the process of bending and forming the blank 10, the fourth upper pressing block 262 and the fourth forming block 263 press the blank 10, then the fourth upper die plate 261 moves downwards under the drive of the upper die holder 21, and the fourth forming block 263 on the lower die holder 22 is matched to realize die closure, so that the blank 10 bent to a fourth angle theta 4 is obtained.

In some embodiments, the bend angle differences between the first angle θ1 and the second angle θ2, between the second angle θ2 and the third angle θ3, and between the third angle θ3 and the fourth angle θ4 are equal in some embodiments.

In some embodiments, the first angle θ1 is 45 °, the second angle θ2 is 60 °, the third angle θ3 is 75 °, and the fourth angle θ4 is 90 °. The bending angle differences between the first angle theta 1 and the second angle theta 2, between the second angle theta 2 and the third angle theta 3 and between the third angle theta 3 and the fourth angle theta 4 are all 15 degrees.

It will be appreciated that during bending of blank 10 by bending mechanism 20, the number of bends of blank 10 is not limited to four times, and the difference in bending angles between first angle θ1 and second angle θ2, between second angle θ2 and third angle θ3, and between third angle θ3 and fourth angle θ4 may be unequal, and in some embodiments bending mechanism 20 further includes a fifth bending group for bending blank 10 at fourth angle θ4 to form a fifth angle, a sixth bending group for bending blank 10 at a fifth angle to form a sixth angle, and so on. By increasing the bending times, the bending angle of the blank 10 is reduced, the deformation of the blank 10 during bending is reduced, and the utilization rate of the blank 10 is improved.

Specifically, taking the bending mechanism 20 including the first bending group 23, the second bending group 24, the third bending group 25, the fourth bending group 26, the fifth bending group and the sixth bending group as an example, the first angle θ1 is 45 °, the second angle θ2 is 50 °, the third angle θ3 is 60 °, the fourth angle θ4 is 72 °, the fifth angle is 81 °, and the sixth angle is 90 °.

Referring back to fig. 1, in some embodiments, bending mechanism 20 further includes a bending lower plate 80, and bending lower plate 80 is disposed on a side of lower die holder 22 facing bending block 60 and connected to bending block 60. The bending lower pad 80 plays a role of fixing the bending forming block 60, and simultaneously, the influence of the bending upper template 40 and the bending upper pressing block 50 on the deformation of the lower die base 22 due to the fact that pressure is applied to the blank 10 in the bending process by matching with the bending forming block 60 can be reduced.

Referring to fig. 3, in some embodiments, bending mechanism 20 further includes a first lower plate 235. The first lower pad 235 is disposed on a side of the lower die holder 22 facing the first molding block 233 and connected to the first molding block 233. The first lower pad 235 plays a role of fixing the first forming block 233, and simultaneously, can also reduce the influence of the pressure applied to the blank 10 in the bending process by the first upper template 231 and the first upper pressing block 232 in cooperation with the first forming block 233 on the deformation of the lower die holder 22.

With continued reference to fig. 5, in some embodiments bending mechanism 20 further includes a second lower bolster 245. The second lower bolster 245 is provided on a side of the lower die holder 22 facing the second molding block 243 and is connected to the second molding block 243. The second lower pad 245 plays a role of fixing the second forming block 243, and simultaneously, the influence of the second upper template 241 and the second upper pressing block 242, which are matched with the second forming block 243, on the deformation of the lower die base 22 due to the application of pressure to the blank 10 in the bending process can be reduced.

With continued reference to fig. 7, in some embodiments, bending mechanism 20 further includes a third lower pad 255. The third lower pad 255 is disposed on a side of the lower die holder 22 facing the third molding block 253 and is connected to the third molding block 253. The third lower pad 255 plays a role of fixing the third molding block 253, and simultaneously, can also reduce the influence of the pressure applied to the blank 10 in the bending process by the third upper template 251 and the third upper pressing block 252 in cooperation with the third molding block 253 on the deformation of the lower die holder 22.

With continued reference to fig. 9, in some embodiments, bending mechanism 20 further includes a fourth lower bolster 265. The fourth lower pad 265 is disposed on a side of the lower die holder 22 facing the fourth molding block 263 and is connected to the fourth molding block 263. The fourth lower cushion plate 265 plays a role of fixing the fourth forming block 263, and simultaneously, the influence of the fourth upper template 261 and the fourth upper pressing block 262 on the deformation of the lower die base 22 due to the fact that pressure is applied to the blank 10 in the bending process by matching with the fourth forming block 263 can be reduced.

Referring to fig. 11 and 12 together, in some embodiments, the forming apparatus 100 further includes a forging mechanism 30, where the forging mechanism 30 is disposed between the upper die holder 21 and the lower die holder 22 to extrude the blank 10 at the fourth angle θ4.

The forging mechanism 30 includes a forging upper press 301, a forging lower die plate 302, a forging forming block 303, and a lower pad 304. The forging and pressing lower die plate 302 is arranged on one side of the upper die seat 21 facing the lower die seat 22, a first forging and pressing forming hole 305 is formed in the forging and pressing lower die plate 302 in a penetrating mode, and the forging and pressing upper pressing block 301 is connected with one side of the upper die seat 21 facing the forging and pressing lower die plate 302 and is located in the first forging and pressing forming hole 305. The forging forming block 303 is arranged on one side of the lower die holder 22 facing the forging lower die plate 302, the forging forming block 303 is provided with a second forging forming hole 306 with an opening facing the forging upper pressing block 301, one end of the lower cushion block 304 is positioned in the first forging forming hole 305, and the other end of the lower cushion block 304 is positioned in the second forging forming hole 306. When the blank 10 is processed and molded, the blank 10 is sleeved on the lower cushion block 304 while the blank 10 is placed in the first forging molding hole 305 in the forging lower die plate 302, the lower cushion block 304 is supported by the forging molding block 303, then the upper pressing block moves downwards under the driving of the upper die holder 21, and the blank 10 is extruded by matching with the forging molding block 303 on the lower die holder 22, so that a finished product is obtained.

In some embodiments, the forging mechanism 30 further includes a lower clamp plate 307 and a forging lower plate 308. The forging press pad 308 is disposed on a side of the lower die holder 22 facing the forging forming block 303 and is connected to the forging forming block 303, and the forging press pad 308 plays a role of fixing the forging forming block 303. The lower clamping plate 307 is arranged between the forging lower base plate 308 and the forging lower die plate 302, the height of the forging lower die plate 302 is smaller than that of the lower cushion block 304, when the forging lower die plate 302 moves downwards, the lower clamping plate 307 can fill the height difference between the forging lower die plate 302 and the lower cushion block 304, and the problem that the forging lower die plate 302 is damaged due to faults in the process of extruding the forging lower die plate 302 downwards to forge the forging forming block 303 is solved.

The present application also provides a bending method, referring to fig. 13 and 14, which uses the forming device 100 to bend and form a blank 10, the bending method includes the following steps:

s1, bending the blank through a first bending group 23 to form a first angle;

s2, bending the blank at the first angle through a second bending group 24 to form a second angle;

s3, bending the blank at the second angle through a third bending group 25 to form a third angle;

and S4, bending the blank at the third angle through a fourth bending group 26 to form a fourth angle.

In some embodiments, the first angle θ1, the second angle θ2, the third angle θ3, and the fourth angle θ4 increase in sequence.

In some embodiments, prior to S1, further comprising:

s0, preprocessing the edge of the blank 10.

In particular, in some embodiments, the blank 10 may be die-cut or linearly cut during pretreatment, and the four corners of the blank 10 are cut into arc structures, so that unevenness of the blank 10 on a horizontal plane is reduced, and subsequent bending is facilitated. Although the edge treatment can also be carried out after the molding, the molded product is in a 3D structure, which is unfavorable for punching or cutting, so that the edge treatment is more convenient before bending.

In some embodiments, prior to S0, further comprising: the thickness of the blank 10 is measured.

In particular, in some embodiments, the thickness of the finished product after processing is set to be a first thickness, the thickness of the blank 10 selected during the pretreatment is a second thickness, the blank 10 needs to be polished before the blank 10 is pretreated, and during the polishing, the thickness of the blank 10 has a wear amount, which is understood to be greater than the first thickness. Wherein the amount of wear is in the range of 1mm-2mm.

In some embodiments, prior to S0, further comprising: performance tests were performed on the material selected for the blank 10.

Wherein, the blank 10 material of AL6063-T4 is adopted to perform performance test, and the hardness, strength and elongation performance of the blank 10 material are mainly tested. Taking sample A and sample B as examples, the following tests were performed:

TABLE 1 test items, test Specifications, equipment information, and test Environment

Table 2 results of hardness testing of blank samples

As can be seen from tables 1 and 2, the hardness of the sample a is smaller than that of the sample B under the same test environment.

TABLE 3 chemical composition of blank samples

As can be seen from tables 1 and 3, the chemical component contents of the a sample and the B sample are almost the same under the same test environment.

Table 4 mechanical property test of blank samples

Table 5 blank sample hardness test results

As can be seen from tables 4 and 5, the a sample and the B sample have a lower strength than the B sample and a higher elongation than the B sample under the same test environment.

In summary, the hardness and strength of the sample a are smaller than those of the sample B, and the elongation of the sample a is greater than that of the sample B; it will be appreciated that materials with lower hardness, lower strength and higher elongation are more advantageous for forming, so that sample a is more suitable for bending than sample B.

In some embodiments, after S4, further comprising:

and S5, extruding the end part of the blank 10.

In particular, in some embodiments, the blank 10 is placed in the forging mechanism 30 to extrude the end of the blank 10, and the material inside the blank 10 is extruded by force to flow around, so that the four corners at the original top end of the blank 10 are reduced until sharp corners appear.

In the bending forming method, the blank 10 is subjected to repeated bending forming and then is subjected to forging extrusion, only a 600-800 ton oil press is needed, the problem that a large-sized oil press with the cold forging requirement of more than 3500 tons is solved, the oil press with the weight of less than 800 tons can also meet the production requirement, the material is not subjected to severe extrusion through repeated bending forming, the deformation of the material is less, annealing is not needed in the forming process, the process is reduced, the cost is saved, the mechanical property of the finished product is good, the productivity is high, the material utilization rate is high, the method is particularly suitable for mass production, the strength of the formed part is high, the dimensional accuracy is high, the surface quality is good, most of cutting processing is omitted, and the cost is greatly reduced.

It will be appreciated by persons skilled in the art that the above embodiments are provided for illustration of the application and are not intended to be limiting, and that suitable modifications and variations of the above embodiments are within the scope of the disclosure, insofar as they fall within the true spirit of the application.

Claims (5)

1. A forming device for processing a metal or alloy blank, the forming device comprising a bending mechanism comprising: the upper die holder and the lower die holder are arranged at intervals;

the bending mechanism further comprises a first bending group, a second bending group, a third bending group and a fourth bending group, and the first bending group, the second bending group, the third bending group and the fourth bending group are sequentially arranged between the upper die holder and the lower die holder to bend blanks;

the first bending group is used for bending the blank to form a first angle;

the second bending group is used for bending the blank at the first angle to form a second angle;

the third bending group is used for bending the blank at the second angle to form a third angle;

the fourth bending group is used for bending the blank at the third angle to form a fourth angle;

the first angle, the second angle, the third angle and the fourth angle are sequentially increased;

the forming device further comprises a forging mechanism, the forging mechanism is arranged between the upper die holder and the lower die holder and extrudes the blank at the fourth angle, the forging mechanism comprises a forging upper pressing block, a forging lower die plate, a forging forming block, a lower cushion block, a lower clamping plate and a forging lower cushion plate, the forging lower die plate is arranged on one side of the upper die holder facing the lower die holder, a first forging forming hole is formed in the forging lower die plate in a penetrating mode, the forging upper pressing block is connected with one side of the upper die holder facing the forging lower die plate and is positioned in the first forging forming hole, the forging forming block is arranged on one side of the lower die holder facing the forging lower die plate, the forging forming block is provided with a second forging forming hole with an opening facing the forging upper pressing block, one end of the lower cushion block is positioned in the first forging forming hole, the lower cushion plate is arranged on one side of the lower die holder facing the forging forming block and is connected with the forging forming block, and the forging lower cushion plate is higher than the forging lower cushion plate;

the first bending group, the second bending group, the third bending group and the fourth bending group all comprise a bending upper die plate, a bending upper pressing block and a bending forming block, the bending upper die plate is arranged on one side of the upper die base towards the lower die base, the bending upper die plate is provided with a bending forming hole with an opening towards the lower die base, the bending upper pressing block is connected with the bending upper die plate and is positioned in the bending forming hole, the bending forming block is connected with the lower die base and faces the bending upper pressing block, the bending upper die plate, the bending upper pressing block and the bending forming block are matched to be used for sequentially bending blanks, and the bending mechanism further comprises a bending lower base plate which is arranged on one side of the lower die base towards the bending forming block and is connected with the bending forming block.

2. The molding apparatus of claim 1, wherein: the bending angle differences between the first angle and the second angle, between the second angle and the third angle and between the third angle and the fourth angle are equal.

3. The molding apparatus of claim 1, wherein: the first angle is 45 degrees, the second angle is 60 degrees, the third angle is 75 degrees, and the fourth angle is 90 degrees.

4. A bending forming method, using the forming device according to any one of claims 1 to 3, characterized by comprising the steps of:

bending the blank through a first bending group to form a first angle;

bending the blank at the first angle through a second bending group to form a second angle;

bending the blank at the second angle through a third bending group to form a third angle;

and bending the blank at the third angle through a fourth bending group to form a fourth angle.

5. The bending molding method as claimed in claim 4, wherein: the bending molding method further includes at least one of the following (a) and (b):

(a) The method comprises the steps of preprocessing the edge of a blank before bending the blank for a plurality of times;

(b) After the blank is bent for a plurality of times, the blank is placed in a forging mechanism to extrude the end part of the blank.