CN109304388B - Device and method for in-mold bending of hydraulic forming four-bend part - Google Patents
Device and method for in-mold bending of hydraulic forming four-bend part Download PDFInfo
- Publication number
- CN109304388B CN109304388B CN201710627501.6A CN201710627501A CN109304388B CN 109304388 B CN109304388 B CN 109304388B CN 201710627501 A CN201710627501 A CN 201710627501A CN 109304388 B CN109304388 B CN 109304388B
- Authority
- CN
- China
- Prior art keywords
- bending insert
- bending
- upper die
- lower die
- press
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
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
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/06—Bending rods, profiles, or tubes in press brakes or between rams and anvils or abutments; Pliers with forming dies
-
- 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
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
- B21D26/047—Mould construction
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention discloses an in-mold bending device for a hydroformed four-bend part, which comprises an upper mold and a lower mold; the upper die is connected with the press and moves downwards in the bending process, and the surface of the upper die, which is in contact with the workpiece, is provided with four bending parts. Correspondingly, the invention also discloses a method for bending the workpiece by adopting the hydraulic forming four-bend part in-mold bending device. The hydraulic forming four-bend part in-mold bending device overcomes the problem that parts in the prior art are easy to generate quality defects through structural optimization. In addition, the bending operation of the bending device in the hydroformed four-bent part press mold is simple and convenient, the device is particularly suitable for hydroforming automatic production, and the obtained hydroformed four-bent part has stable and reliable quality and does not have quality defects such as undercut collapse of the part and the like.
Description
Technical Field
The present invention relates to a die apparatus and method, and more particularly, to a die apparatus and method for hydroforming.
Background
In the aircraft, spacecraft and automotive field, weight reduction to save materials and energy consumption in operation is one of the trends in the development of modern manufacturing techniques. Hydroforming is an advanced manufacturing technique developed on this background for the manufacture of hollow lightweight structural members that improves the strength and rigidity of the formed member, saves material, and reduces cost. The hydraulic forming can be divided into pipe fitting hydraulic forming and plate hydraulic forming, and the pipe fitting hydraulic forming is the most common, the technical requirement is that a straight pipe workpiece is placed into a hydraulic forming die cavity after being pre-bent, high-pressure liquid is introduced into a bent pipe, a part is attached to the wall of the hydraulic forming die cavity through the acting force of the high-pressure liquid from inside to outside, the die is opened after pressure relief, and then the hydraulic forming part is taken out. In this machining method, the condition of the pre-bent part tends to directly affect the dimensional condition of the part after hydroforming.
At present, in the manufacturing process of a hydroformed part, a conventional prebending process method of a four-bend part is produced by a traditional bending mode of a numerical control double-layer die and a molding clamping die. However, the prior art has the following problems: quality defects such as wrinkling are easily generated in the part bending process, and easy-to-wear parts such as an anti-wrinkling die and the like need to be replaced for anti-wrinkling, so that the cost is increased; in addition, numerical control bending equipment needs to be added in the layout of the hydraulic forming process independently, so that the prior art has the problems of unreasonable process layout and overhigh process cost.
Disclosure of Invention
The invention aims to provide a hydroformed four-bent part in-mold bending device which overcomes the problem that parts in the prior art are easy to generate quality defects through structural optimization. In addition, the bending operation of the bending device in the hydroformed four-bent part press mold is simple and convenient, the device is particularly suitable for hydroforming automatic production, and the obtained hydroformed four-bent part has stable and reliable quality and does not have quality defects such as undercut collapse of the part and the like.
In order to achieve the purpose, the invention provides an in-mold bending device for a hydroformed four-bend part, which comprises an upper mold and a lower mold;
wherein, the last mould is connected with the press to move down in the in-process of bending, the surface that goes up mould and work piece contact has four flexion, go up the mould and include:
an upper die base;
the upper die end bending insert blocks are fixedly arranged at the two end parts of the upper die base;
the middle bending insert of the upper die is arranged between the bending inserts at the end part of the upper die;
the upper die middle bending insert driving element is connected with the upper die middle bending insert so as to drive the upper die middle bending insert to protrude or retract relative to the upper die end bending insert;
wherein, the lower mould includes:
a lower die base;
the lower die end part is fixed with a bending insert which is fixedly arranged at the two end parts of the lower die base;
the middle fixing bending insert is arranged in the middle of the lower die end fixing bending insert and is fixedly arranged on the lower die base;
the lower die end part floating bending insert is correspondingly arranged between each lower die end part fixed bending insert and the lower die middle fixed bending insert;
and the lower die end floating press bending insert driving element is connected with the lower die end floating press bending insert so as to drive the lower die end floating press bending insert to protrude or retract relative to the lower die end fixed press bending insert.
The working process of the hydraulic forming four-bend part in-mold press bending device when bending the part is further explained as follows:
when the straight pipe bending device works, a straight pipe workpiece is placed on the floating bending insert at the end part of the lower die in a state that the floating bending insert at the end part of the lower die is convex relative to the fixed bending insert at the end part of the lower die;
the middle bending insert of the upper die protrudes relative to the end bending insert of the upper die, and in the state, the press drives the upper die to feed and press towards the lower die until the middle bending insert of the upper die contacts a straight pipe workpiece;
the press drives the upper die to continuously press down until the continuously increased pressing force F1 is greater than the critical pressure F2 which can be borne by the floating press bending insert at the end part of the lower die;
the press drives the upper die to continue pressing down, and the floating press bending insert at the end part of the lower die retracts under the driving of the driving element of the floating press bending insert at the end part of the lower die until the floating press bending insert is completely retracted into the lower die;
the press drives the upper die to continuously press down until the continuously increased downward pressure F1 is greater than the critical pressure F3 which can be borne by the middle bending insert of the upper die, and the middle bending insert of the upper die retracts under the driving of the middle bending insert driving element of the upper die until the upper die and the lower die are completely closed, so that the bending process is completed.
Further, in the device for bending the hydroformed four-bend part in the die, the upper die further comprises an upper die middle bending insert side baffle plate which is arranged on the side surface of the upper die middle bending insert.
Furthermore, in the hydroformed four-bend part in-mold bending device, the side baffle of the middle bending insert of the upper mold is provided with a pin hole, the corresponding middle bending insert of the upper mold is also provided with a pin hole, and the limit pin is correspondingly inserted into the pin hole of the side baffle of the middle bending insert of the upper mold and the corresponding pin hole of the middle bending insert of the upper mold so as to position the relative position of the side baffle of the middle bending insert of the upper mold and the middle bending insert of the upper mold.
Further, in the device for bending the hydraulically-formed four-bent part in the die, the lower die further comprises a limiting plate fixedly arranged on the fixed bending insert at the end part of the lower die, and the limiting plate limits the protruding stroke of the floating bending insert at the end part of the lower die relative to the fixed bending insert at the end part of the lower die.
Further, in the hydroformed four-bend part in-mold press bending device of the invention, the upper mold middle press bending insert driving element is an upper mold cylinder.
In the above scheme, in some preferred embodiments, the upper die cylinder is a nitrogen cylinder.
Further, in the hydroformed four-bend part in-mold press bending device, the driving element of the floating press bending insert at the end part of the lower mold is a lower mold cylinder.
In the above scheme, in some preferred embodiments, the lower die cylinder is a nitrogen cylinder.
Furthermore, in the hydroformed four-bend part in-mold press bending device, a lower mold end floating press bending insert side baffle is fixedly arranged on the side surface of the lower mold end floating press bending insert.
Furthermore, in the hydroformed four-bend part in-mold bending device, the fixed bending insert at the end part of the lower mold is provided with a hanging ring.
Correspondingly, the invention also aims to provide a method for bending a workpiece by adopting the hydraulic forming four-bent part membrane internal bending device, the method is simple and convenient to operate, is particularly suitable for hydraulic forming automatic production, and the obtained hydraulic forming four-bent part has stable and reliable quality and does not have quality problems of undercut collapse and the like of the part, thereby meeting the production requirement.
In order to achieve the purpose, the invention provides a method for bending a workpiece by using the hydraulic forming four-bend part in-mold bending device, which comprises the following steps:
placing the straight pipe workpiece on the floating bending insert at the end part of the lower die in a state that the floating bending insert at the end part of the lower die is convex relative to the fixed bending insert at the end part of the lower die;
the middle bending insert of the upper die protrudes relative to the end bending insert of the upper die, and in the state, the press drives the upper die to feed and press towards the lower die until the middle bending insert of the upper die contacts a straight pipe workpiece;
the press drives the upper die to continuously press down until the continuously increased pressing force F1 is greater than the critical pressure F2 which can be borne by the floating press bending insert at the end part of the lower die;
the press drives the upper die to continue pressing down, and the floating press bending insert at the end part of the lower die retracts under the driving of the driving element of the floating press bending insert at the end part of the lower die until the floating press bending insert is completely retracted into the lower die;
the press drives the upper die to continuously press down until the continuously increased downward pressure F1 is greater than the critical pressure F3 which can be borne by the middle bending insert of the upper die, and the middle bending insert of the upper die retracts under the driving of the middle bending insert driving element of the upper die until the upper die and the lower die are completely closed, so that the bending process is completed.
Compared with the prior art that four-bend parts capable of meeting the hydraulic forming cannot be directly manufactured by directly bending in the die in the conventional technology, the technical scheme of the invention designs the hydraulic forming four-bend part in-die bending device through the optimized device structure reasonable structural layout, and replaces the traditional bending method, so that the parts are more reasonable in the hydraulic forming process layout, and the production process is more efficient.
In addition, the method for bending the workpiece by adopting the in-mold bending device for the hydroformed four-bent part is reliable and feasible, is simple and convenient to operate, is particularly suitable for hydroforming automatic production, ensures stable and reliable quality of the obtained four-bent part after bending, has no defects of undercut, collapse and the like of the part, and meets the production requirement.
Drawings
Fig. 1 is a schematic structural diagram of a hydroformed four-bend part in-mold press bending device according to an embodiment of the invention.
Fig. 2 is a schematic structural diagram of a lower die of the hydroformed four-bend part in-die press bending device in one embodiment of the invention.
Fig. 3 is a schematic structural diagram of an upper die of the hydroformed four-bend part in-die press bending device in one embodiment of the invention.
Fig. 4 shows a schematic structural diagram of a four-bend part formed by the hydroformed four-bend part in-mold bending device.
Figure 5 shows the part of figure 4 after direct hydroforming of the four-bend part.
Detailed Description
The hydroformed part in-mold press bending apparatus and method of the present invention will be further explained and illustrated with reference to the drawings and the specific embodiments of the present invention, which, however, should not be construed to unduly limit the technical scope of the present invention.
Fig. 1 is a schematic structural diagram of a hydroformed four-bend part in-mold press bending device according to an embodiment of the invention.
As shown in fig. 1, a hydroformed four-bent part inner press bending apparatus 1 in the present embodiment includes an upper die 2 and a lower die 3, wherein the upper die 2 includes: an upper die base 21, an upper die end bending insert 22, an upper die middle bending insert 23, and an upper die middle bending insert driving element (not shown in the figure). The upper die end bending insert 22 is fixedly arranged at the two end parts of the upper die base 21; the middle bending insert 23 of the upper die is arranged between the bending inserts 22 at the end part of the upper die; and the upper die middle bending insert driving element is connected with the upper die middle bending insert 23 to drive the upper die middle bending insert 23 to protrude or retract relative to the upper die end bending insert 22.
Furthermore, as can be seen with further reference to fig. 1, the lower die 3 comprises: a lower die base 31, a lower die end fixing press bending insert 32, a lower die middle fixing press bending insert 33, a lower die end floating press bending insert 34 and a lower die end floating press bending insert driving element (not shown in the figure). Wherein, the lower die end is fixed with a bending insert 32 which is fixed on the two ends of the lower die base 31; the middle fixed bending insert 33 of the lower die is arranged in the middle of the fixed bending insert 32 at the end part of the lower die and is fixedly arranged on the lower die base 31; the lower die end floating bending insert 34 is correspondingly arranged between each lower die end fixed bending insert 32 and the lower die middle fixed bending insert 33; and a lower die end floating press bending insert driving element which is connected with the lower die end floating press bending insert 34 to drive the lower die end floating press bending insert 34 to bulge or retract relative to the lower die end fixed press bending insert 32.
It should be noted that the upper die 2 is connected to the press and moves downward during the press bending, and the surface of the upper die 2 contacting the workpiece has four curved portions.
Further reference may be made to fig. 2 and 3 with regard to the structure of the lower and upper dies. Fig. 2 is a schematic structural diagram of a lower die of the hydroformed four-bend part in-die press bending device in one embodiment of the invention. Fig. 3 is a schematic structural diagram of an upper die of the hydroformed four-bend part in-die press bending device in one embodiment of the invention.
As shown in fig. 2, the lower die 3 of the hydroformed four-bend part in-die press bending apparatus according to the present embodiment includes: a lower die base 31, a lower die end fixing press bending insert 32, a lower die middle fixing press bending insert 33, a lower die end floating press bending insert 34 and a lower die end floating press bending insert driving element (not shown in the figure). The lower die base 31 includes a lower die pad 312 and a lower die base raised plate 311 disposed between the base and the lower die pad 312. And a lifting ring 6 is arranged on the fixed bending insert 32 at the end part of the lower die, and the lifting ring 6 is used for lifting the lower die 3.
In addition, the lower die 3 further comprises a limiting plate 8 fixedly arranged on the fixed press bending insert at the end part of the lower die, and the limiting plate 8 limits the protruding stroke of the floating press bending insert 34 at the end part of the lower die relative to the fixed press bending insert 32 at the end part of the lower die, that is, when the floating press bending insert 34 at the end part of the lower die is pressed down to a certain position along with the straight pipe workpiece 200, the floating press bending insert is limited by the limiting plate 8 and cannot move downwards continuously. In addition, a lower die end floating press bending insert side baffle 72 is fixedly arranged on the side surface of the lower die end floating press bending insert 34.
As shown in fig. 3, an upper die 2 of the hydroformed four-bend part in-die press bending apparatus according to the present embodiment includes: an upper die base 21, an upper die end bending insert 22, an upper die middle bending insert 23, and an upper die middle bending insert driving element (not shown in the figure). The upper mold base 21 includes an upper mold base plate 212 and an upper mold base raising plate 211 disposed between the base and the upper mold base plate 212.
The upper die 2 further includes an upper die middle press bending insert side fence 71 provided on a side surface of the upper die middle press bending insert 23. The middle bending insert side baffle 71 of the upper die is provided with a pin hole, the corresponding middle bending insert 23 of the upper die is also provided with a pin hole, and the limit pin 9 is correspondingly inserted into the pin hole of the middle bending insert side baffle of the upper die and the corresponding pin hole of the middle bending insert of the upper die so as to position the relative position of the middle bending insert 23 of the upper die of the middle bending insert side baffle 71 of the upper die.
In the present embodiment, the upper die middle press bending insert driving element is an upper die cylinder, and the lower die end floating press bending insert driving element is a lower die cylinder.
Fig. 4 shows a schematic structural diagram of a four-bend part formed by the hydroformed four-bend part in-mold bending device.
As shown in fig. 4, a straight pipe workpiece is press-bent by using the hydroformed four-bend part in-mold press bending apparatus according to the present invention, thereby obtaining a four-bend part 300, where the four-bend part 300 has four bending portions 3001.
The method for bending a workpiece by using the hydroformed four-bend part in-mold bending device according to the present invention will be further described with reference to fig. 1 to 4. The method, comprising the steps of:
placing the straight pipe workpiece 200 on the lower die end floating press bending insert 34 in a state that the lower die end floating press bending insert 34 protrudes relative to the lower die end fixed press bending insert 32;
the middle bending insert 23 of the upper die protrudes relative to the end bending insert 22 of the upper die, and in this state, the press drives the upper die 2 to feed and press towards the lower die 3 until the middle bending insert 23 of the upper die contacts the straight pipe workpiece 200;
the press drives the upper die 2 to continuously press down until the continuously increased pressing force F1 is greater than the critical pressure F2 which can be borne by the floating press bending insert 34 at the end part of the lower die;
the press drives the upper die 2 to continue pressing down, and the lower die end floating press bending insert 34 retracts under the driving of the lower die end floating press bending insert driving element until the lower die end floating press bending insert is completely retracted into the lower die 3;
the press drives the upper die 2 to continuously press downwards until the continuously increased downward pressure F1 is greater than the critical pressure F3 which can be borne by the upper die middle bending insert 23, the upper die middle bending insert 23 retracts under the driving of the upper die middle bending insert driving element until the upper die 2 and the lower die 3 are completely closed, the bending process is completed, and the four-bend part 300 is obtained.
FIG. 5 shows the part 400 of the four-bend part of FIG. 4 after direct hydroforming.
Therefore, compared with the prior art that four-bend parts capable of meeting the hydraulic forming cannot be directly manufactured by directly performing in-mold bending in the conventional technology, the technical scheme of the invention designs the in-mold bending device for the four-bend parts for the hydraulic forming through optimizing the reasonable structural layout of the device, replaces the traditional bending method, and ensures that the parts are more reasonable in the hydraulic forming process layout and the production process is more efficient.
In addition, the method for bending the workpiece by adopting the in-mold bending device for the hydroformed four-bent part is reliable and feasible, is simple and convenient to operate, is particularly suitable for hydroforming automatic production, ensures stable and reliable quality of the obtained four-bent part after bending, has no defects of undercut, collapse and the like of the part, and meets the production requirement.
It should be noted that the combination of the features in the present application is not limited to the combination described in the claims of the present application or the combination described in the embodiments, and all the features described in the present application may be freely combined or combined in any manner unless contradicted by each other.
In addition, it should be noted that the above-mentioned embodiments are only specific embodiments of the present invention, and obviously, the present invention is not limited to the above-mentioned embodiments, and many similar variations exist. All modifications which would occur to one skilled in the art and which are, therefore, directly derived or suggested from the disclosure herein are deemed to be within the scope of the present invention.
Claims (9)
1. A hydraulic forming four-bend part in-mold bending device is characterized by comprising an upper mold and a lower mold;
wherein, the last mould is connected with the press to move down in the in-process of bending, the surface that goes up mould and work piece contact has four flexion, go up the mould and include:
an upper die base;
the upper die end bending insert blocks are fixedly arranged at the two end parts of the upper die base;
the middle bending insert of the upper die is arranged between the bending inserts at the end part of the upper die;
the upper die middle bending insert driving element is connected with the upper die middle bending insert so as to drive the upper die middle bending insert to protrude or retract relative to the upper die end bending insert;
wherein, the lower mould includes:
a lower die base;
the lower die end part is fixed with a bending insert which is fixedly arranged at the two end parts of the lower die base;
the middle fixing bending insert is arranged in the middle of the lower die end fixing bending insert and is fixedly arranged on the lower die base;
the lower die end part floating bending insert is correspondingly arranged between each lower die end part fixed bending insert and the lower die middle fixed bending insert;
and the lower die end floating press bending insert driving element is connected with the lower die end floating press bending insert so as to drive the lower die end floating press bending insert to protrude or retract relative to the lower die end fixed press bending insert.
2. The apparatus of claim 1 wherein the upper die further comprises an upper die center press bending insert side dam disposed on a side of the upper die center press bending insert.
3. The apparatus according to claim 2, wherein the upper die middle press bending insert side baffle is provided with a pin hole, and the corresponding upper die middle press bending insert is also provided with a pin hole, and a limit pin is inserted into the pin hole of the upper die middle press bending insert side baffle and the corresponding pin hole of the upper die middle press bending insert, so as to position the relative position of the upper die middle press bending insert side baffle and the upper die middle press bending insert.
4. The apparatus of claim 1, wherein the lower die further comprises a limiting plate fixedly disposed on the fixed press bending insert at the end of the lower die, and the limiting plate limits the protruding stroke of the floating press bending insert at the end of the lower die relative to the fixed press bending insert at the end of the lower die.
5. The apparatus of claim 1 wherein the upper die intermediate press bending insert driving element is an upper die cylinder.
6. The apparatus of claim 1 wherein the lower die end floating press bending insert driving element is a lower die cylinder.
7. The apparatus of claim 1, wherein the side of the lower die end floating press bending insert is fixedly provided with a lower die end floating press bending insert side baffle.
8. The apparatus according to claim 1, wherein the insert for fixing the press bending at the end of the lower die is provided with a hanging ring.
9. A method of press bending a workpiece using a hydroformed four-bend part in-mold press bending apparatus according to any of claims 1-8, comprising the steps of:
placing the straight pipe workpiece on the floating bending insert at the end part of the lower die in a state that the floating bending insert at the end part of the lower die is convex relative to the fixed bending insert at the end part of the lower die;
the middle bending insert of the upper die protrudes relative to the end bending insert of the upper die, and in the state, the press drives the upper die to feed and press towards the lower die until the middle bending insert of the upper die contacts a straight pipe workpiece;
the press drives the upper die to continuously press down until the continuously increased pressing force F1 is greater than the critical pressure F2 which can be borne by the floating press bending insert at the end part of the lower die;
the press drives the upper die to continue pressing down, and the floating press bending insert at the end part of the lower die retracts under the driving of the driving element of the floating press bending insert at the end part of the lower die until the floating press bending insert is completely retracted into the lower die;
the press drives the upper die to continuously press down until the continuously increased downward pressure F1 is greater than the critical pressure F3 which can be borne by the middle bending insert of the upper die, and the middle bending insert of the upper die retracts under the driving of the middle bending insert driving element of the upper die until the upper die and the lower die are completely closed, so that the bending process is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710627501.6A CN109304388B (en) | 2017-07-28 | 2017-07-28 | Device and method for in-mold bending of hydraulic forming four-bend part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710627501.6A CN109304388B (en) | 2017-07-28 | 2017-07-28 | Device and method for in-mold bending of hydraulic forming four-bend part |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109304388A CN109304388A (en) | 2019-02-05 |
| CN109304388B true CN109304388B (en) | 2020-06-12 |
Family
ID=65202528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710627501.6A Active CN109304388B (en) | 2017-07-28 | 2017-07-28 | Device and method for in-mold bending of hydraulic forming four-bend part |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109304388B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109807252B (en) * | 2019-02-28 | 2021-05-28 | 保隆(安徽)汽车配件有限公司 | Sectional type preforming method for torsion beam |
| CN109967629A (en) * | 2019-04-25 | 2019-07-05 | 肇庆胜尚知识产权服务有限公司 | A kind of split type plate molding die |
| CN110434206B (en) * | 2019-09-02 | 2024-04-12 | 河南永福德科技股份有限公司 | Bent pipe forming device and bent pipe forming method |
| CN110586684B (en) * | 2019-10-25 | 2020-09-22 | 大连理工大学 | Large-size thin-wall annular shell inflation hot-press bending forming device and method |
| CN114472666B (en) * | 2020-11-13 | 2024-07-23 | 上海宝钢高新技术零部件有限公司 | Forming device and method for tubular hydroformed front fender support |
| CN113664080A (en) * | 2021-07-28 | 2021-11-19 | 凌云工业股份有限公司 | Strip-shaped piece multi-point control flexible bending forming device |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU566646A1 (en) * | 1976-01-04 | 1977-07-30 | Харьковский авиационный институт | Machine for bending tubular work |
| JP2002219526A (en) * | 2001-01-22 | 2002-08-06 | Shibayama Kikai:Kk | Method and apparatus for bending and forming tube |
| JP3867201B2 (en) * | 2001-07-24 | 2007-01-10 | 昭和電工株式会社 | Method and apparatus for manufacturing metal bent pipe with bulge |
| JP2003088927A (en) * | 2001-09-14 | 2003-03-25 | Honda Motor Co Ltd | Hot forming method of tubular member |
| JP4577560B2 (en) * | 2004-09-21 | 2010-11-10 | 日産自動車株式会社 | Hydraulic forming apparatus and hydraulic forming method |
| CA2616550A1 (en) * | 2005-07-26 | 2007-02-15 | Aquaform, Inc. | Apparatus and method for forming shaped parts |
| CN202180136U (en) * | 2011-06-20 | 2012-04-04 | 苏州金鸿顺汽车部件股份有限公司 | Forming device of pipe end forming die |
| CN102601204A (en) * | 2012-03-15 | 2012-07-25 | 吉林省元隆达工装设备有限公司 | Multi-deformed bending forming method and device for pipe fitting |
| CN202591342U (en) * | 2012-03-15 | 2012-12-12 | 吉林省元隆达工装设备有限公司 | A pipe fitting bending forming device |
| EP3134217B1 (en) * | 2014-04-21 | 2021-11-17 | Sumitomo Heavy Industries, Ltd. | Hydroforming apparatus |
| CN105215130B (en) * | 2015-08-26 | 2017-07-28 | 上海汇众汽车制造有限公司 | The curved swollen performance testing device of tubing |
| CN105598265A (en) * | 2015-12-21 | 2016-05-25 | 哈尔滨奔马科技有限公司 | Overall forming method of small-relative-bending-radius and large-diameter-thickness-ratio thin-walled bent pipe fitting |
-
2017
- 2017-07-28 CN CN201710627501.6A patent/CN109304388B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109304388A (en) | 2019-02-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109304388B (en) | Device and method for in-mold bending of hydraulic forming four-bend part | |
| CN105537360B (en) | A kind of positive and negative drawing forming method of sheet metal soft mode | |
| CN101244439B (en) | Mechanical-hydraulic auxiliary reverse redrawing mold | |
| CN101767164A (en) | Method for producing thin-wall metal circular ring and grading stamping mould used therefor | |
| CN103084488B (en) | Two-way blank pressing drawing and coining integration die | |
| CN113182388B (en) | Thin-wall multi-cavity member shape correction die and method based on compression deformation | |
| CN103611814B (en) | A kind of three dynamic drawing dies | |
| CN101274341A (en) | Metal processing and molding method for reducing plastic resilience | |
| CN104289623A (en) | Cold contraction and expansion forming method for rim base | |
| CN204449176U (en) | A kind of block forging mould for cross axle Warm Extrusion | |
| CN201618779U (en) | Ejecting device for tee branch pipes adopting hydraulic bulging | |
| CN202910142U (en) | Oil pan drawing device | |
| CN103586332B (en) | The process for stamping and forming of car Rear secondary frame for vehicle main body | |
| CN104438949A (en) | Train damping bracket machining technology | |
| CN104971993A (en) | Three-purpose rolling die provided with guide columns capable of being moved out and achieving combination and switching of upper die bodies and lower die bodies | |
| CN214920157U (en) | Automobile wheel hub forging device | |
| CN209902081U (en) | Pressure boost shock attenuation die | |
| CN112170610B (en) | Liquid-filling forming die and liquid-filling forming method | |
| CN104043713A (en) | Technology of double-action press stretching mold | |
| CN209318684U (en) | A kind of seamless steel pipe local contraction formed automobile axle tube hot-extrusion mold | |
| CN203679015U (en) | Metal sheet part press forming die | |
| CN203556741U (en) | Triple-action drawing die | |
| CN203044671U (en) | Pipe fitting local hole shrinkage stamping die | |
| CN105964801A (en) | Stamping die | |
| CN202137264U (en) | Special necking and arc-surface shaping die for lower pressure plate of lower support of automobile shock absorber |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |