CN110743941A - Self-return heavy traceless bending die - Google Patents
Self-return heavy traceless bending die Download PDFInfo
- Publication number
- CN110743941A CN110743941A CN201911233155.9A CN201911233155A CN110743941A CN 110743941 A CN110743941 A CN 110743941A CN 201911233155 A CN201911233155 A CN 201911233155A CN 110743941 A CN110743941 A CN 110743941A
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- bending
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- plate
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- 238000005452 bending Methods 0.000 title claims abstract description 90
- 238000005096 rolling process Methods 0.000 claims abstract description 15
- 230000009471 action Effects 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 2
- 238000010030 laminating Methods 0.000 claims 1
- 230000003068 static effect Effects 0.000 abstract description 5
- 238000007373 indentation Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000007246 mechanism Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000000137 annealing Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000013003 hot bending Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/002—Positioning devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/04—Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention provides a self-return heavy traceless bending die which comprises an upper bending die, a lower bending die and a self-return device, wherein the upper bending die is arranged on an upper working platen of a hydraulic press, the lower bending die is correspondingly arranged on a lower working platen of the hydraulic press, and the self-return device is arranged on the lower bending die and is used for rolling, rubbing and bending an attached plate; the bending upper die comprises an upper die plate fixed on the upper working table plate, an upper base plate and an upper die which are fixedly connected through screws. The novel bending die structure consisting of the rolling shaft, the matched bending die seat mechanism and the rotary self-return device is adopted, and the traditional V-shaped bending die is converted into rolling friction bending of relative static workpieces through the rotation of the rolling shaft; the hydraulic press is matched with the self-return heavy traceless bending die, so that the problems of unstable bending precision, bending indentation and the like of the thick plate are solved, the product quality is greatly improved, and the production efficiency is improved.
Description
Technical Field
The invention relates to the technical field of machining, in particular to a self-return heavy traceless bending die.
Background
Due to the fact that the types of the special-shaped chains are various, the chain plate bending requirements of different thicknesses and materials are different, for example, a 40Cr material bending plate is bent by 90 degrees (the thickness is less than or equal to 8mm, the cold forming is carried out after annealing, and the thickness is greater than 8mm, the hot forming is carried out), due to the influences of various factors such as the thickness of the material, the annealing hardness, the heating position and the heating time, in the forming process of a common 90-degree bending die, the relative slippage of two sides of a bending line is different, the bending size is unstable, and indentations are formed on two sides after. The traditional bending mode can not meet the bending requirements of high precision and high quality.
Disclosure of Invention
The invention provides a self-return heavy traceless bending die to solve the problems in the background art.
The technical problem solved by the invention is realized by adopting the following technical scheme: the self-return heavy traceless bending die comprises an upper bending die arranged on an upper working platen of a hydraulic press, a lower bending die correspondingly arranged on a lower working platen of the hydraulic press, and a self-return device arranged on the lower bending die and used for rolling, rubbing and bending an attached plate; the bending upper die comprises an upper die plate fixed on the upper working platen, an upper base plate and an upper die which are fixedly connected through screws; the bending lower die comprises a lower die core, a lower base plate, a lower die fixing plate and a lower die side fixing plate, wherein the lower die core is used for enabling a bending attachment plate to abut against the bending lower die core; the self-return device comprises a roller acting on the bending and rolling of the bending attachment plate and a self-return component connected with the roller to realize self-return action.
Preferably, the lower mold core is fixedly installed at the upper end of the lower backing plate, the lower mold fixing plate and the lower mold side fixing plate are fixedly installed on the lower backing plate and located at the side end of the lower mold core, and the lower mold fixing plate and the lower mold side fixing plate clamp and wrap the lower mold core and are welded; the lower backing plate is fixedly arranged on the bottom plate and is fixedly connected with the lower working bedplate through the bottom plate.
Preferably, the upper ends of the lower mold core and the lower mold fixing plate are provided with a wire-cutting cavity, and the cavity is relatively positioned at the right lower end of the upper mold.
Preferably, the upper backing plate is installed between the upper die and the upper die plate, and the lower end of the upper die corresponds to the cavity and is of a V-shaped structure.
Preferably, the rollers are installed at opposite positions on both sides of the cavity and movably connected through a self-return assembly.
Preferably, the self-return assembly comprises a rotating arm arranged at two ends of the rolling shaft, a connecting buckle rotatably connected with the rotating arm, a spring screw for controlling the telescopic adjustment of the connecting buckle, a mold spring sleeved at the outer end of the spring screw to abut against the connecting buckle, and a spring seat arranged on one side of the spring screw far away from the connecting buckle for fixing, wherein one end of the mold spring far away from the connecting buckle is attached to the spring seat.
Preferably, the spring seat is fixedly installed on the lower die side fixing plate through a locking screw rod; the hole of the spring seat for the through connection of the locking screw rod and the spring screw rod is a U-shaped hole.
Preferably, the rotating arm is plugged into a U-shaped structural groove in the middle of the connecting buckle and is inserted into a corresponding pin hole through a connecting pin for connection.
Preferably, the upper end of the lower die side fixing plate is provided with a positioning block for clamping a bending datum plane of the bending attachment plate, and the positioning block is installed on the lower die side fixing plates on two sides of the lower die core.
Preferably, the lower die core is provided with a nozzle tip communicated with an oil guide groove in the cavity, and the oil guide groove is arranged corresponding to the roller so as to lubricate the roller.
Compared with the prior art, the invention has the beneficial effects that: the novel bending die structure consisting of the rolling shaft, the matched bending die seat mechanism and the rotary self-return device is adopted, and the traditional V-shaped bending die (sliding friction bending) is converted into rolling friction bending of a workpiece which is relatively static through the rotation of the rolling shaft; the hydraulic press matched with the self-return heavy traceless bending die solves the problems of unstable bending precision, bending indentation and the like of the thick plate, greatly improves the product quality and improves the production efficiency; has the following advantages:
(1) the slippage in the bending movement is effectively reduced, and the bending precision is improved;
(2) the surface quality is effectively improved due to the relative static of the workpiece, and traceless bending is realized;
(3) the heavy rolling shaft can ensure the precision of the hot bending of the thick plate;
(4) the rotation self-return system enables the initial plane of the bending movement to be uniform, so that semi-automatic production of chain plate bending is realized.
Drawings
FIG. 1 is a schematic perspective view of a self-return heavy traceless bender according to the present invention;
FIG. 2 is a schematic front view of FIG. 1;
FIG. 3 is a schematic view of the attachment of FIG. 1;
fig. 4 is a side view of fig. 1.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the invention is further described below by combining the specific drawings.
As shown in FIGS. 1-4,
the self-return heavy traceless bending die comprises an upper bending die arranged on an upper working platen of a hydraulic press, a lower bending die correspondingly arranged on a lower working platen of the hydraulic press, and a self-return device arranged on the lower bending die and used for rolling, rubbing and bending an auxiliary bending plate 4; the bending upper die comprises an upper die plate 1 fixed on the upper working table plate, an upper base plate 2 and an upper die 3 which are fixedly connected through screws; the bending lower die comprises a lower die core 7 for enabling the bending attachment plate 4 to abut against the bending, a lower backing plate 18 for fixing the lower die core 7, a lower die fixing plate 16 and a lower die side fixing plate 17; the self-return device comprises a roller 8 acting on the bending and rolling of the bending attachment plate 4 and a self-return component for realizing self-return action by connecting the roller 8.
The embodiment is different from embodiment 1 in that the lower mold core 7 is fixedly installed at the upper end of a lower backing plate 18, the lower mold fixing plate 16 and the lower mold side fixing plate 16 are fixedly installed on the lower backing plate 18 and located at the side end of the lower mold core 7, and the lower mold fixing plate 16 and the lower mold side fixing plate 17 clamp and wrap the lower mold core 7 and are connected in a welding manner; the lower backing plate 18 is fixedly arranged on the bottom plate 19 and is fixedly connected with the lower working bedplate through the bottom plate 19.
The difference between this embodiment and embodiment 1 is that the upper ends of the lower mold core 7 and the lower mold fixing plate 16 are provided with line-cut cavities, and the cavities are located at the positions opposite to the right lower end of the upper mold 3.
The difference between the embodiment and embodiment 1 is that the upper backing plate 2 is installed between the upper die 3 and the upper die plate 1, and the lower end of the upper die 3 corresponds to the cavity and is of a V-shaped structure.
The difference between this embodiment and embodiment 1 is that the rollers 8 are installed at opposite positions on both sides of the cavity and are movably connected through a self-return assembly.
The difference between the embodiment and the embodiment 1 is that the self-return assembly includes rotating arms 15 installed at two ends of the roller 8, a connecting buckle 13 rotatably connected with the rotating arms 15, a spring screw 11 for controlling the connecting buckle 13 to stretch and contract, a mold spring 12 sleeved at the outer end of the spring screw 11 and abutting against the connecting buckle 13, and a spring seat 10 arranged on one side of the spring screw 11 far from the connecting buckle 13 for fixing, wherein one end of the mold spring 12 far from the connecting buckle 13 is attached to the spring seat 10.
This embodiment is different from embodiment 1 in that the spring seat 10 is fixedly mounted on the lower die side fixing plate 17 by the lock screw 9.
The difference between this embodiment and embodiment 1 is that the hole of the spring seat 10 for the through connection of the locking screw 9 and the spring screw 11 is a U-shaped hole, which facilitates the up-and-down adjustment of the spring seat 10.
This embodiment is different from embodiment 1 in that the rotation arm 15 is inserted into a U-shaped groove in the middle of the connecting link 13 and is connected by inserting the connecting pin 14 into the corresponding pin hole.
The embodiment is different from embodiment 1 in that a positioning block 5 for clamping a bending reference surface of the bending attachment plate 4 is provided at an upper end of the lower mold side fixing plate 17, and the positioning block 5 is mounted on the lower mold side fixing plate 17 on both sides of the lower mold core 7.
The difference between this embodiment and embodiment 1 is that the lower mold core 7 is provided with a nozzle 6 communicating with an oil guiding groove in the cavity, which is provided corresponding to the roller 8 so as to lubricate the roller 8.
The bending movement process of the invention is as follows: the plane of the roller 8 is a bending reference surface when being in a horizontal position, the self-return device is in an initial position, the bending attachment plate 4 is horizontally placed on the reference surface of the roller 8 and abuts against the positioning block 5, the bending upper die is pressed down along with the slider, the lowest point of the upper die 3 is contacted with the bending attachment plate 4, the bending attachment plate 4 starts to be bent, and the bending attachment plate 4 is subjected to plastic deformation. In the process, the reference surface of the roller 8 and the contact surface of the curved attachment plate 4 are kept relatively static, the rollers 8 on the two sides are kept synchronously rotating, the rotating arm 15 of the self-returning device and the roller 8 are kept synchronously rotating, the die spring 12 is compressed to provide reverse force for the roller 8, and the relative slippage of the curved attachment plate 4 is smaller as the compression amount of the die spring 12 is increased and the compression force of the reference surface of the roller 8 to the contact surface of the curved attachment plate 4 is larger (theoretically, the two are relatively static). When the die is pressed to a bottom dead center, the bending movement is finished, two reference surfaces of the roller 8 form 90 degrees, and the forming surface of the upper die 3, the stress surface of the bending attachment plate 4 and the reference surfaces of the roller 8 are overlapped in pairs. And returning the upper die to the original point, rebounding the roller 8 to the horizontal reference position by the die spring 12, ejecting the formed bent plate 4, and finishing the whole bending process.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. From heavy no trace bender of return stroke, its characterized in that: the bending device comprises an upper bending die arranged on an upper working platen of a hydraulic press, a lower bending die correspondingly arranged on a lower working platen of the hydraulic press, and a self-return device arranged on the lower bending die and used for rolling, rubbing and bending the bending attachment plate; the bending upper die comprises an upper die plate fixed on the upper working platen, an upper base plate and an upper die which are fixedly connected through screws; the bending lower die comprises a lower die core, a lower base plate, a lower die fixing plate and a lower die side fixing plate, wherein the lower die core is used for enabling a bending attachment plate to abut against the bending lower die core; the self-return device comprises a roller acting on the bending and rolling of the bending attachment plate and a self-return component connected with the roller to realize self-return action.
2. The self-return heavy traceless bender according to claim 1, wherein: the lower die core is fixedly arranged at the upper end of the lower backing plate, the lower die fixing plate and the lower die side fixing plate are fixedly arranged on the lower backing plate and positioned at the side end of the lower die core, and the lower die fixing plate and the lower die side fixing plate clamp and wrap the lower die core and are welded and connected; the lower backing plate is fixedly arranged on the bottom plate and is fixedly connected with the lower working bedplate through the bottom plate.
3. The self-return heavy traceless bender according to claim 2, wherein: and the upper ends of the lower mold core and the lower mold fixing plate are provided with cavities for wire cutting, and the cavities are relatively positioned at the right lower end of the upper mold.
4. The self-return heavy traceless bender according to claim 3, wherein: the upper backing plate is installed between the upper die and the upper die plate, and the lower end of the upper die corresponds to the cavity and is of a V-shaped structure.
5. The self-return heavy traceless bender according to claim 4, wherein: the roller is arranged at the opposite positions of the two sides of the cavity and is movably connected with the cavity through a self-return assembly.
6. The self-return heavy traceless bender according to claim 5, wherein: from return stroke subassembly including install at the rocking arm at roller bearing both ends, rotate the connector link of being connected, the spring screw of control connector link flexible regulation and cup joint and support the mould spring of connector link, set up and keep away from connector link one side at the spring screw and carry out the spring holder fixed in the spring screw outer end, the mould spring is kept away from connector link one end and is connected with the spring holder laminating.
7. The self-return heavy traceless bender according to claim 6, wherein: the spring seat is fixedly arranged on the lower die side fixing plate through a locking screw rod; the hole of the spring seat for the through connection of the locking screw rod and the spring screw rod is a U-shaped hole.
8. The self-return heavy traceless bender according to claim 6, wherein: the rotating arm is plugged into a U-shaped structure groove in the middle of the connecting buckle and is inserted into the corresponding pin hole through the connecting pin for connection.
9. The self-return heavy traceless bender according to claim 7, wherein: and the upper end of the lower die side fixing plate is provided with a positioning block for clamping a bending datum plane of the bending attachment plate, and the positioning block is arranged on the lower die side fixing plates on two sides of the lower die core.
10. The self-return heavy traceless bender according to claim 9, wherein: the lower die core is provided with a nozzle tip communicated with an oil guide groove in the cavity, and the oil guide groove is arranged corresponding to the roller so as to lubricate the roller.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911233155.9A CN110743941A (en) | 2019-12-05 | 2019-12-05 | Self-return heavy traceless bending die |
| PCT/CN2019/124157 WO2021109172A1 (en) | 2019-12-05 | 2019-12-10 | Self-return-stroke heavy traceless bending die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911233155.9A CN110743941A (en) | 2019-12-05 | 2019-12-05 | Self-return heavy traceless bending die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110743941A true CN110743941A (en) | 2020-02-04 |
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ID=69285585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911233155.9A Pending CN110743941A (en) | 2019-12-05 | 2019-12-05 | Self-return heavy traceless bending die |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110743941A (en) |
| WO (1) | WO2021109172A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111633127A (en) * | 2020-06-08 | 2020-09-08 | 哈尔滨电气动力装备有限公司 | Wet winding motor rotor slot liner bending tool |
| CN115178613A (en) * | 2022-09-09 | 2022-10-14 | 汕头市万盛兴智能科技有限公司 | Sheet metal part continuous automatic feeding high-precision continuous punching machine and punching method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103801623A (en) * | 2014-03-05 | 2014-05-21 | 唐山轨道客车有限责任公司 | Bending and stamping die |
| CN204934349U (en) * | 2015-08-25 | 2016-01-06 | 贵州振华华联电子有限公司 | A kind of rolling friction Bending Mould |
| JP6004296B1 (en) * | 2015-08-12 | 2016-10-05 | 株式会社吉野機械製作所 | Bending mold and bending method using the same |
| CN208321825U (en) * | 2018-05-04 | 2019-01-04 | 青岛圣茂源精密机械模具制造有限公司 | A kind of Traceless bending die tool |
| CN209206239U (en) * | 2018-10-22 | 2019-08-06 | 罗益机械制造(苏州)有限公司 | Seamless rolling-sliding type Bending Mould |
| CN110369565A (en) * | 2019-08-09 | 2019-10-25 | 贵阳品创科技有限公司 | A kind of dog-ear processing unit of hardware sheet metal component |
| CN211360189U (en) * | 2019-12-05 | 2020-08-28 | 安徽绩溪徽山链传动有限公司 | Self-return heavy traceless bending die |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202045265U (en) * | 2011-03-24 | 2011-11-23 | 苏州市艾西依钣金制造有限公司 | Short edge folding mold |
| US20130111967A1 (en) * | 2011-10-10 | 2013-05-09 | Invacare Corp. | Punch and die set |
| CN205684592U (en) * | 2016-06-25 | 2016-11-16 | 周口师范学院 | A kind of steel plate bending mould |
| CN108580685A (en) * | 2018-05-08 | 2018-09-28 | 河南森源电气股份有限公司 | Bending mould |
| CN108637048A (en) * | 2018-06-01 | 2018-10-12 | 佛山恩慈科技有限公司 | A kind of V-arrangement workpiece bows molding die and forming method |
| CN208245506U (en) * | 2018-06-06 | 2018-12-18 | 吴江市天富金属制品有限公司 | A kind of fitness equipment part bending press machine |
| CN108941269B (en) * | 2018-07-20 | 2019-10-29 | 江麓机电集团有限公司 | A kind of special vehicle titanium alloy plate heat pressing forming device and forming method |
-
2019
- 2019-12-05 CN CN201911233155.9A patent/CN110743941A/en active Pending
- 2019-12-10 WO PCT/CN2019/124157 patent/WO2021109172A1/en active Application Filing
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103801623A (en) * | 2014-03-05 | 2014-05-21 | 唐山轨道客车有限责任公司 | Bending and stamping die |
| JP6004296B1 (en) * | 2015-08-12 | 2016-10-05 | 株式会社吉野機械製作所 | Bending mold and bending method using the same |
| CN204934349U (en) * | 2015-08-25 | 2016-01-06 | 贵州振华华联电子有限公司 | A kind of rolling friction Bending Mould |
| CN208321825U (en) * | 2018-05-04 | 2019-01-04 | 青岛圣茂源精密机械模具制造有限公司 | A kind of Traceless bending die tool |
| CN209206239U (en) * | 2018-10-22 | 2019-08-06 | 罗益机械制造(苏州)有限公司 | Seamless rolling-sliding type Bending Mould |
| CN110369565A (en) * | 2019-08-09 | 2019-10-25 | 贵阳品创科技有限公司 | A kind of dog-ear processing unit of hardware sheet metal component |
| CN211360189U (en) * | 2019-12-05 | 2020-08-28 | 安徽绩溪徽山链传动有限公司 | Self-return heavy traceless bending die |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111633127A (en) * | 2020-06-08 | 2020-09-08 | 哈尔滨电气动力装备有限公司 | Wet winding motor rotor slot liner bending tool |
| CN111633127B (en) * | 2020-06-08 | 2022-04-05 | 哈尔滨电气动力装备有限公司 | Wet winding motor rotor slot liner bending tool |
| CN115178613A (en) * | 2022-09-09 | 2022-10-14 | 汕头市万盛兴智能科技有限公司 | Sheet metal part continuous automatic feeding high-precision continuous punching machine and punching method thereof |
| CN115178613B (en) * | 2022-09-09 | 2022-11-25 | 汕头市万盛兴智能科技有限公司 | Sheet metal part continuous automatic feeding high-precision continuous punching machine and punching method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021109172A1 (en) | 2021-06-10 |
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