CN114472666B - Forming device and method for tubular hydroformed front fender support - Google Patents
Forming device and method for tubular hydroformed front fender support Download PDFInfo
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- CN114472666B CN114472666B CN202011266297.8A CN202011266297A CN114472666B CN 114472666 B CN114472666 B CN 114472666B CN 202011266297 A CN202011266297 A CN 202011266297A CN 114472666 B CN114472666 B CN 114472666B
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- 238000000034 method Methods 0.000 title claims description 44
- 238000007667 floating Methods 0.000 claims abstract description 45
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 238000005452 bending Methods 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 6
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
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- 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
-
- 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
-
- 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
- B21D53/00—Making other particular articles
- B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention discloses a forming device for a tubular hydroformed front fender support member, which comprises a pre-forming assembly, a hydroforming assembly and a hydroforming device. The pre-forming upper die of the pre-forming assembly is connected with the pre-forming press so as to move towards the pre-forming lower die under the driving of the pre-forming press; the hydroforming upper die of the hydroforming assembly is connected with the hydroforming machine so as to move towards the hydroforming lower die under the drive of the hydroforming machine; the hydroforming upper die comprises: hydroforming an upper die base; upper die end floating inserts arranged at two end parts of the hydroformed upper die base; an upper die middle insert arranged between the upper die end floating inserts; an upper die end floating insert driving element connected with the upper die end floating insert to drive the upper die end floating insert to protrude or retract relative to the upper die intermediate insert; the first end seal assembly and the second end seal assembly are capable of sealing two ends of a hydroformed tube when the upper die end floating insert is in contact with the hydroformed lower die.
Description
Technical Field
The present invention relates to a forming apparatus and method, and more particularly, to a hydroforming forming apparatus and method.
Background
In the field of aircraft, spacecraft and automobiles, weight saving to save materials and energy consumption in operation is one of the trends in modern manufacturing technology. The hydroforming is an advanced manufacturing technology for manufacturing the hollow light structural member, which is developed under the background, not only can meet the light manufacturing requirement of parts, but also can manufacture tubular automobile front fender support parts with different section structures according to different positions in order to meet the requirements of the appearance of an automobile on the modeling.
The front fender support is an indispensable part of a fender assembly, is connected with a front fender of an automobile, and is matched with parts such as an engine cover, a damping tower, a front bumper, a vehicle door, a side wall and the like. The automobile fender is an appearance part of an automobile, and the fender support piece is required to provide mounting positions and supports for the fenders with different shapes, so that the rigidity of the fender assembly is improved, the offset collision performance of the automobile is improved, and the damage to personnel after the automobile collides is reduced better.
Compared with the tubular hydroformed front fender support, the conventional fender support is usually manufactured by sheet stamping. For example: chinese patent document with publication number CN101700788a, publication date 2010, 5 month and 5 date, named "an automobile fender mounting structure", discloses an automobile fender mounting structure, which comprises a fender support member which is a fender cross beam, and the fender cross beam is a plate stamping part.
The conventional sheet-punched fender supports of the prior art still have a number of drawbacks, which often require a plurality of punched parts to be welded, and do not meet the requirements of rigidity, high offset crash performance, and support complex fender styling designs while meeting the requirements of automobile weight reduction.
Based on the above, in view of the defects in the prior art, the invention is expected to obtain a forming device and a forming method for a tubular hydroformed front fender support member, and the forming device and the forming method can meet the requirement of light weight of automobile parts, and can meet the performance of rigidity, high offset collision performance and support the requirement of complex fender modeling design.
Disclosure of Invention
The invention aims to provide a forming device for a tubular hydroformed front fender support, which can be used for effectively manufacturing the tubular hydroformed front fender support which can meet the requirement of light weight of automobile parts, can also meet the performance of rigidity, high offset collision performance and support the design requirement of complex fender modeling. The problems that the number of parts of the traditional plate stamping fender support piece is large, the spatial layout is difficult, the modeling difficulty of the matched fender is high, and the light weight effect is not obvious are solved.
In order to achieve the above object, the present invention proposes a forming device of a tubular hydroformed front fender support, comprising a pre-forming assembly, a hydroforming assembly and a hydroforming apparatus;
Wherein the preform assembly comprises: a pre-forming upper die and a pre-forming lower die; the pre-forming upper die is connected with the pre-forming press so as to move towards the pre-forming lower die in the pre-forming process under the driving of the pre-forming press;
Wherein the hydroforming assembly comprises: a hydroformed upper die, a hydroformed lower die, a first end seal assembly and a second end seal assembly; the upper hydroforming die is connected with the hydroforming machine so as to move towards the lower hydroforming die in the hydroforming process under the drive of the hydroforming machine; wherein the hydroformed upper die comprises:
Hydroforming an upper die base;
upper die end floating inserts provided at both end portions of the hydroformed upper die base;
The upper die middle insert is arranged between the floating inserts at the end parts of the upper die;
an upper die end floating insert driving element connected with the upper die end floating insert to drive the upper die end floating insert to protrude or retract relative to the upper die intermediate insert;
Wherein the first and second end seal assemblies are configured to: when the upper die end floating insert is in contact with the hydroforming lower die, both ends of the tube to be hydroformed are sealed, and the hydroforming apparatus builds up an internal pressure inside the tube.
In certain preferred embodiments of the above aspects, in certain preferred embodiments, the upper die end floating insert driving element may employ a nitrogen cylinder.
Further, in the forming apparatus according to the present invention, the hydroforming lower die includes:
hydroforming a lower die base;
And the lower die insert is arranged on the hydroformed lower die base.
Further, in the forming apparatus of the present invention, the first end seal assembly and the second end seal assembly each include:
An end seal;
And feeding cylinders respectively connected with the end sealing pieces to drive the end sealing pieces to feed to the sealing stations.
Further, in the forming device of the present invention, a first guide sleeve and a first guide post are provided between the upper hydroforming die and the lower hydroforming die, wherein the first guide sleeve and the first guide post are arranged in a matching manner.
Further, in the forming device of the present invention, a second guide sleeve and a second guide post are provided between the upper pre-forming die and the lower pre-forming die, wherein the second guide sleeve and the second guide post are adapted to each other.
Further, in the forming apparatus of the present invention, the pre-forming upper die includes:
Pre-forming an upper die bottom plate;
a preformed upper die insert disposed on the preformed upper die base plate;
An upper die rebound adjustment block arranged on the preformed upper die bottom plate through a first rotating shaft perpendicular to the preformed upper die bottom plate;
the upper die rebound adjusting assembly applies force to the head end of the upper die rebound adjusting block so as to drive the upper die rebound adjusting block to rotate on the preformed upper die bottom plate by taking the first rotating shaft as a rotating shaft;
the upper die fixing assembly is used for fixing the upper die rebound adjusting block after the upper die rebound adjusting block completes rotation;
the lower preform mold includes:
preforming a lower die bottom plate;
a preformed lower die insert disposed on the preformed lower die base plate;
the lower die rebound adjusting block is arranged on the preformed lower die bottom plate through a second rotating shaft perpendicular to the preformed lower die bottom plate;
the lower die rebound adjusting assembly applies force to the head end of the lower die rebound adjusting block so as to drive the lower die rebound adjusting block to rotate on the preformed lower die bottom plate by taking the second rotating shaft as a rotating shaft;
and the lower die fixing assembly is used for fixing the lower die rebound adjusting block after the lower die rebound adjusting block completes rotation.
Further, in the forming device of the present invention, an end stopper is further provided beside the insert of the lower preform die.
Correspondingly, the invention also aims to provide a forming method of the tubular hydroformed front fender support member, which is simple and convenient to operate, is particularly suitable for hydroforming production, and the obtained tubular hydroformed front fender support member has stable and reliable quality, can meet the requirement of light weight of automobile parts, can meet the requirements of rigidity and high offset collision performance, and can effectively support complex fender modeling design.
In order to achieve the above object, the present invention proposes a method for forming a tubular hydroformed front fender support, comprising the steps of:
100: making the straight pipe into an elbow;
200: preforming the bent pipe by adopting the preforming assembly of the forming device;
300: and carrying out hydroforming on the preformed pipe fitting by adopting the hydroforming assembly of the forming device.
Further, in the forming method according to the present invention, the step 200 includes:
201: placing the bent pipe in a preformed lower die, and driving a die clamping process of a preformed upper die through a preformed press to obtain a preliminary preformed pipe fitting;
202: measuring an actual bending angle theta of the preliminary pre-pipe fitting, comparing the actual bending angle theta with a target angle, and adjusting the rotation angles of the upper die rebound adjusting block and the lower die rebound adjusting block according to the comparison result;
steps 201 and 202 are repeated until the actual bending angle θ of the preliminary preform is identical to the target angle, and the preliminary preform obtained at this time is taken as the preform entering step 300.
Further, in the forming method according to the present invention, the step 300 includes:
301: placing the preformed pipe fitting in a hydroforming lower die;
302: in a static state of the hydroforming upper die, an upper die end floating insert driving element drives an upper die end floating insert to float out of the molded surface of an upper die middle insert by a preset distance L, and the initial pressure of the upper die end floating insert driving element is F1;
303: the hydraulic forming press drives the whole hydraulic forming upper die to press downwards until the floating insert at the end part of the upper die is contacted with the hydraulic forming lower die, at the moment, the first end sealing component and the second end sealing component seal the two ends of the preformed pipe fitting to be hydraulically formed, and the hydraulic forming equipment injects pressure liquid into the preformed pipe fitting to build a first internal pressure P1 in the preformed pipe fitting and keep for a first period of time;
304: when the die clamping pressure F2 of the upper die and the lower die is more than F1, the floating insert at the end part of the upper die is retracted to the bottom, and the upper die and the lower die are completely clamped;
305: the hydroforming device injects pressure liquid into the preformed tube to establish a second internal pressure P2 within the preformed tube and for a second period of time such that the outer surface of the tube conforms to the cavity of the hydroforming assembly; wherein P2 is greater than P1;
306: and releasing pressure and opening the hydroforming assembly to hydroform the pipe fitting.
Further, in the forming method of the invention, P1 is 20-50 MPa, and the first time is 1-30 s; and/or P2 is 100-180 MPa, and the second time is 1-10 s.
Compared with the prior art adopting the plate for stamping and processing the fender support, the technical scheme designs the forming device for the tubular hydroformed front fender support through optimizing the structure of the device. The forming device can be used for effectively manufacturing the tubular hydroformed front fender support member which can meet the light-weight requirement of automobile parts, and can meet the rigidity performance, the high offset collision performance and the requirement of supporting complex fender modeling design. The problems that the number of parts of the traditional plate stamping fender support piece is large, the spatial layout is difficult, the modeling difficulty of the matched fender is high, and the light weight effect is not obvious are solved.
The tubular hydroformed front fender support produced by the method can provide mounting positions and supports for fenders of different shapes, improves rigidity of a fender assembly, and improves offset collision performance of an automobile, so that injury to personnel after the automobile collides is reduced better, and the tubular hydroformed front fender support has good popularization prospect and application value.
Drawings
Fig. 1 is a schematic structural view of a hydroformed upper die of a hydroformed tubular front fender support member forming apparatus according to the present invention in one embodiment.
Fig. 2 is a schematic view of a hydroforming lower die of a hydroformed tubular front fender support forming device according to one embodiment of the invention.
Fig. 3 is a schematic structural view of a pre-forming upper die of a pre-forming assembly of a tubular hydroformed front fender support forming device according to the invention in one embodiment.
Fig. 4 is a schematic structural view of a lower pre-forming die of a pre-forming assembly of a tubular hydroformed front fender support forming device according to the invention in one embodiment.
Fig. 5 is a top view of the structure of the lower preform die of the preform assembly of the apparatus for forming a tubular hydroformed front fender support according to the invention in one embodiment.
Fig. 6 schematically shows a schematic representation of the rebound of a fender support prior to tubular hydroforming.
Fig. 7 shows a schematic view of the structure of an elbow formed by the method for forming a tubular hydroformed front fender support according to the invention.
Fig. 8 shows a schematic structural view of a preformed tube shaped by the method for shaping a tubular hydroformed front fender support according to the invention.
Fig. 9 shows a schematic structural view of a tubular hydroformed front fender support formed by the method for forming a tubular hydroformed front fender support according to the invention.
Detailed Description
The forming device and method of the tubular hydroformed front fender support according to the invention will be further explained and illustrated with reference to the drawings and specific examples, which, however, do not constitute an undue limitation on the technical solutions of the invention.
According to the technical scheme, the forming device of the tubular hydraulic forming front fender support is designed by optimizing the structure of the device. In the present invention, the forming device of the tubular hydroformed front fender support according to the present invention may include: a preform assembly, a hydroforming assembly and a hydroforming apparatus (not shown).
When the forming device is adopted to manufacture the tubular hydroformed front fender support, the preforming component of the forming device can finish the preforming treatment of the pipe fitting to obtain a preformed pipe fitting (shown in figure 8); accordingly, the hydroforming assembly in the device may further hydroform the preformed tube to provide a tubular hydroformed front fender support (as shown in FIG. 9).
Fig. 1 is a schematic structural view of a hydroformed upper die of a hydroformed tubular front fender support member forming apparatus according to the present invention in one embodiment.
Fig. 2 is a schematic view of a hydroforming lower die of a hydroformed tubular front fender support forming device according to one embodiment of the invention.
As can be seen with reference to fig. 1 and 2 in combination, in this embodiment, the hydroforming assembly of the forming device of the present invention may comprise: a hydroformed upper die 1, a hydroformed lower die 2, a first end seal assembly 3 and a second end seal assembly 4.
In the forming apparatus according to the present invention, the upper hydroforming die 1 is connected to a hydroforming machine (not shown) and is movable toward the lower hydroforming die 2 during hydroforming by the drive of the hydroforming machine.
As shown in fig. 1, in the hydroforming assembly according to the present invention, a hydroforming upper die 1 may include: the upper die base 11, upper die end floating insert 12, upper die intermediate insert 13 and upper die end floating insert drive elements (not shown) are hydroformed. Wherein upper die end floating inserts 12 are provided at both end portions of the hydroformed upper die base 11; the upper die middle insert 13 is arranged between the upper die end floating inserts 12; an upper die end floating insert driving element is connected to the upper die end floating insert 12 and it can drive the upper die end floating insert 12 to protrude or retract relative to the upper die intermediate insert 13.
Correspondingly, also included in the hydroformed assembly are a first end seal assembly 3 and a second end seal assembly 4, which are arranged to: when the upper die end floating insert 12 is in contact with the hydroforming lower die 2, both ends of the tube to be hydroformed are sealed, thereby ensuring that the hydroforming apparatus in the forming device of the present invention builds up internal pressure within the tube.
As shown in fig. 2, in the present embodiment, the first end seal assembly 3 and the second end seal assembly 4 may each include: an end seal 5 and a feed cylinder 6. Wherein a feed cylinder 6 is connected to the end seal 5, the feed cylinder 6 can drive the end seal 5 to feed to the sealing station.
With continued reference to fig. 2, and with simultaneous reference to fig. 1, in this embodiment, a hydroforming lower die 2 of a hydroforming assembly according to the present invention may comprise: a lower die base 21 and a lower die insert 22 are hydroformed. Wherein the lower die insert 22 is disposed on the hydroformed lower die base 21.
In addition, in the present embodiment, the first guide sleeve 7 and the first guide post 8 which are adapted to each other are provided between the upper hydroforming die 1 and the lower hydroforming die 2 of the forming device according to the present invention. The first guide sleeve 7 and the first guide post 8 can be mutually adapted when the hydroforming upper die 1 moves towards the hydroforming lower die 2 during the hydroforming process.
Fig. 3 is a schematic structural view of a pre-forming upper die of a pre-forming assembly of a tubular hydroformed front fender support forming device according to the invention in one embodiment.
Fig. 4 is a schematic structural view of a lower pre-forming die of a pre-forming assembly of a tubular hydroformed front fender support forming device according to the invention in one embodiment.
Fig. 5 is a top view of the structure of the lower preform die of the preform assembly of the apparatus for forming a tubular hydroformed front fender support according to the invention in one embodiment.
As shown in fig. 3, 4 and 5, in the forming apparatus according to the present invention, the preform assembly may include a preform upper die 9 and a preform lower die 10. Wherein the upper preform die 9 can be connected to a preform press (not shown) to move towards the lower preform die 10 during the preform process under the drive of the preform press.
In the present embodiment, the second guide bush 14 and the second guide post 15 are provided between the upper preform die 9 and the lower preform die 10 so as to be adapted to each other. The second guide sleeve 14 and the second guide post 15 can be mutually adapted when the upper preform mold 9 is moved towards the lower preform mold 10 during the preform process.
As shown in fig. 3, in the present embodiment, the preform upper die 9 includes: a preformed upper die base plate 91, a preformed upper die insert 92, an upper die rebound adjustment block 93, an upper die rebound adjustment assembly (not shown) and an upper die fixing assembly (not shown). Wherein, the preformed upper die insert 92 is arranged on the preformed upper die bottom plate 91; the upper die rebound adjustment block 93 may be provided on the preformed upper die base plate 91 by a first rotation axis (not shown) perpendicular to the preformed upper die base plate 91; an upper die rebound adjustment assembly (not shown in the drawing, having a similar structure to the lower die rebound adjustment assembly described below) is capable of applying a force to the head end of the upper die rebound adjustment block 93, thereby driving the upper die rebound adjustment block 93 to rotate on the preformed upper die base plate 91 with a first rotation axis (not shown in the drawing, having a similar structure to the second rotation axis described below) as a rotation axis; the upper die fixing member ((view angle is not shown, and it has a similar structure to the lower die fixing member described below)) may be fixed after the upper die rebound adjustment block 93 is rotated.
Accordingly, as shown in fig. 4 and 5, in the present embodiment, the preform lower die 10 includes: a preformed lower die base plate 101, a preformed lower die insert 102, a lower die rebound adjustment block 103, a lower die rebound adjustment assembly 104 and a lower die fixing assembly 105. Wherein, the preformed lower die insert 102 is arranged on the preformed lower die bottom plate 101; the lower die rebound adjusting block 103 is arranged on the preformed lower die bottom plate 101 through a second rotating shaft 106 perpendicular to the preformed lower die bottom plate 101; the lower die rebound adjusting assembly 104 can apply force to the head end of the lower die rebound adjusting block 103 so as to drive the lower die rebound adjusting block 103 to rotate on the preformed lower die bottom plate 101 by taking the second rotating shaft 106 as a rotating shaft; the lower die fixing assembly 105 can fix the lower die rebound adjustment block 103 after it has completed rotation.
In the present embodiment, the upper and lower die rebound adjustment assemblies 104 may be screw rods, and an operator may adjust the angles of rotation of the upper and lower die rebound adjustment blocks 93 and 103 by rotating the screw rods, thereby adjusting the angles of the pipe members in the preforming step.
Further, referring to fig. 4, it can be seen that, in the present embodiment, an end stop 107 is further provided beside the pre-forming insert 102 in the forming apparatus according to the present invention, which can be used to limit the position of the pre-forming insert 102 on the pre-forming insert bottom plate 101 before hydroforming, and prevent the pre-forming insert 102 from moving on the pre-forming insert bottom plate 101.
Fig. 6 schematically shows a schematic representation of the rebound of the tubular support.
As shown in fig. 6, after the pipe is preformed by the preforming assembly in the forming device according to the present invention, a preliminary preformed pipe is obtained. It is particularly noted that the preformed tube produced may spring back, resulting in an actual bending angle θ of the preformed tube being different from the desired target angle.
Accordingly, an upper and lower die rebound adjustment assembly 104 are provided in the upper and lower preformed dies 9 and 10, respectively, according to the present invention. The operator can adjust the upper die rebound adjusting assembly and the lower die rebound adjusting assembly 104, drive the upper die rebound adjusting block 93 to rotate on the preformed upper die bottom plate 91 by taking the first rotating shaft as the rotating shaft, drive the lower die rebound adjusting block 103 to rotate on the preformed lower die bottom plate 101 by taking the second rotating shaft 106 as the rotating shaft, adjust the rotating angles of the upper die rebound adjusting block 93 and the lower die rebound adjusting block 103 until the actual bending angle theta of the preformed pipe is consistent with the target angle, and after the adjustment, fix the positions by using the upper die fixing assembly and the lower die fixing assembly 105, thereby ensuring the production quality.
Fig. 7 shows a schematic view of the structure of an elbow formed by the method for forming a tubular hydroformed front fender support according to the invention.
Fig. 8 shows a schematic structural view of a preformed tube shaped by the method for shaping a tubular hydroformed front fender support according to the invention.
Fig. 9 shows a schematic structural view of a tubular hydroformed front fender support formed by the method for forming a tubular hydroformed front fender support according to the invention.
In the present invention, the above-described forming device for a tubular hydroformed front fender support according to the present invention can be used to implement the forming method for a tubular hydroformed front fender support according to the present invention.
As can be seen by referring to fig. 7, 8 and 9 in combination, in the present invention, the tubular hydroformed front fender support can be effectively manufactured using the forming apparatus for the tubular hydroformed front fender support according to the present invention.
As shown in fig. 7, 8 and 9, the method of forming the tubular hydroformed front fender support according to the invention will be further described with reference to fig. 1 to 6. The forming method of the invention can comprise the following steps:
100: making a straight pipe into an elbow pipe 70 as shown in fig. 7;
200: preforming the elbow with the preforming assembly of the forming device for tubular hydroformed front fender support according to the invention to obtain a preformed tube 80 as shown in fig. 8;
300: hydroforming of the preformed tube using the hydroforming assembly of the tube hydroforming front fender support forming apparatus of the present invention results in a fender support 90 as shown in FIG. 9.
In the present embodiment, a straight pipe workpiece is selected for theoretical data of the required fender support, and the bent pipe is bent by a pipe bending apparatus in advance, to obtain the bent pipe 70. The steel material selected in the step 100 of the invention can be DP800 material, and the specification of the straight pipe is phi 88mm multiplied by 1.5mm (the outer diameter of the pipe multiplied by the wall thickness).
When the forming device for forming the front fender support by tubular hydroforming according to the invention is adopted to perform the step 200 of preforming the bent pipe, the following steps can be included:
201: placing the bent pipe in a preformed lower die 10, and driving a die clamping process of a preformed upper die 9 through a preformed press to obtain a preliminary preformed pipe fitting;
202: measuring the actual bending angle theta of the preliminary pre-pipe fitting, comparing the actual bending angle theta with a target angle, and adjusting the rotation angles of the upper die rebound adjusting block 93 and the lower die rebound adjusting block 103 according to the comparison result;
The above steps 201 and 202 are repeated until the actual bending angle θ of the preliminary preform tube 75 coincides with the target angle, and the preliminary preform tube obtained at this time is taken as the preform tube 80 entering the subsequent step 300.
In this embodiment, the target angle in the step 202 may be obtained by CAE simulation calculation.
Accordingly, in this embodiment, when the forming device for tubular hydroforming front fender support according to the present invention is used to hydroform a preformed tube 300, it may include:
301: placing the preformed tube 80 into the hydroformed lower die 2;
302: in a static state of the hydroformed upper die 1, an upper die end floating insert driving element drives an upper die end floating insert 12 to float out of the molded surface of an upper die middle insert 13 by a preset distance L, and the initial pressure of the upper die end floating insert driving element is F1;
303: the hydroforming press drives the whole hydroforming upper die 1 to press down until the upper die end floating insert 12 is contacted with the hydroforming lower die 2, at the moment, the first end sealing component 3 and the second end sealing component 4 seal the two ends of the preformed pipe fitting to be hydroformed, and the hydroforming equipment injects pressure liquid into the preformed pipe fitting to build a first internal pressure P1 in the preformed pipe fitting and keep for a first period of time;
304: when the die clamping pressure F2 of the upper hydroforming die 1 and the lower hydroforming die 2 is more than F1, the floating insert 12 at the end part of the upper die is retracted to the bottom, and the upper hydroforming die 1 and the lower hydroforming die 2 are completely clamped;
305: the hydroforming device injects pressure liquid into the preformed tube to establish a second internal pressure P2 within the preformed tube and for a second period of time such that the outer surface of the tube conforms to the cavity of the hydroforming assembly; wherein P2 is greater than P1;
306: and releasing pressure and opening the hydroforming assembly to hydroform the pipe fitting.
It should be noted that in the above step 302, the upper die end floating insert driving element may drive the upper die end floating insert to float out of the upper die intermediate insert profile by a preset distance L of 10 to 30 mm. In this embodiment, the upper die end floating insert driving element is a nitrogen cylinder that floats out of the die profile displacement l=20 mm.
In addition, in the forming method, the first internal pressure P1 established in the preformed pipe fitting can be controlled between 20 and 50MPa, and the first time is controlled between 1 and 30 seconds; correspondingly, the second internal pressure P2 built up inside the preformed tube can also be controlled between 100 and 180MPa, and the second time can be controlled between 1 and 10s. In the present embodiment, in the above step 303, the first internal pressure P1 of 28MPa may be established inside the preformed tube by the hydroforming device, and maintained in this low pressure state for 10 seconds; accordingly, in step 305 described above, a second internal pressure P2 of 150MPa may be established inside the preformed tube by the hydroforming apparatus and maintained at this high pressure for 2 seconds to cause the outer surface of the preformed tube to conform to the cavity of the hydroforming assembly, thereby meeting the profile requirements of the tubular hydroformed front fender support.
From the above, it can be seen that the forming device for the tubular hydroformed front fender support member can effectively manufacture the tubular hydroformed front fender support member which can meet the requirement of light weight of automobile parts, and can meet the performance of rigidity, high offset collision performance and support the design requirement of complex fender modeling. The problems that the number of parts of the traditional plate stamping fender support piece is large, the spatial layout is difficult, the modeling difficulty of the matched fender is high, and the light weight effect is not obvious are solved.
Compared with the prior art, the tubular hydroformed front fender support produced by the forming method of the tubular hydroformed front fender support can provide mounting positions and supports for fenders with different shapes, improves the rigidity of a fender assembly, and improves the offset collision performance of an automobile, so that the damage to personnel after the automobile collides is better reduced, and the tubular hydroformed front fender support has good popularization prospect and application value.
It should be noted that the combination of the technical features in the present invention is not limited to the combination described in the claims or the combination described in the specific embodiments, and all the technical features described in the present invention may be freely combined or combined in any manner unless contradiction occurs between them.
In addition, it should be noted that the above-mentioned embodiments are merely examples of the present invention, and it is obvious that the present invention is not limited to the above-mentioned embodiments, and many similar variations are followed. All modifications attainable or obvious from the present disclosure set forth herein should be deemed to be within the scope of the present disclosure.
Claims (9)
1. A method of forming a tubular hydroformed front fender support, characterized in that it is carried out on the basis of a forming device of a tubular hydroformed front fender support, said forming device comprising a pre-forming assembly, a hydroforming assembly and a hydroforming apparatus;
Wherein the preform assembly comprises: a pre-forming upper die and a pre-forming lower die; the pre-forming upper die is connected with the pre-forming press so as to move towards the pre-forming lower die in the pre-forming process under the driving of the pre-forming press;
Wherein the hydroforming assembly comprises: a hydroformed upper die, a hydroformed lower die, a first end seal assembly and a second end seal assembly; the upper hydroforming die is connected with the hydroforming machine so as to move towards the lower hydroforming die in the hydroforming process under the drive of the hydroforming machine; wherein the hydroformed upper die comprises: hydroforming an upper die base; upper die end floating inserts provided at both end portions of the hydroformed upper die base; the upper die middle insert is arranged between the floating inserts at the end parts of the upper die; an upper die end floating insert driving element connected with the upper die end floating insert to drive the upper die end floating insert to protrude or retract relative to the upper die intermediate insert; wherein the first and second end seal assemblies are configured to: when the floating insert at the end part of the upper die is contacted with the hydroforming lower die, sealing the two end parts of the pipe fitting to be hydroformed, and establishing internal pressure in the pipe fitting by using the hydroforming equipment;
The forming method comprises the following steps:
100: making the straight pipe into an elbow;
200: preforming the bent pipe by adopting a preforming component of a forming device;
300: hydroforming a preformed tube with a hydroforming assembly of a forming device, further comprising the steps of:
301: placing the preformed pipe fitting in a hydroforming lower die;
302: in a static state of the hydroforming upper die, an upper die end floating insert driving element drives an upper die end floating insert to float out of the molded surface of an upper die middle insert by a preset distance L, and the initial pressure of the upper die end floating insert driving element is F1;
303: the hydraulic forming press drives the whole hydraulic forming upper die to press downwards until the floating insert at the end part of the upper die is contacted with the hydraulic forming lower die, at the moment, the first end sealing component and the second end sealing component seal the two ends of the preformed pipe fitting to be hydraulically formed, and the hydraulic forming equipment injects pressure liquid into the preformed pipe fitting to build a first internal pressure P1 in the preformed pipe fitting and keep for a first period of time;
304: when the die clamping pressure F2 of the upper die and the lower die is more than F1, the floating insert at the end part of the upper die is retracted to the bottom, and the upper die and the lower die are completely clamped;
305: the hydroforming device injects pressure liquid into the preformed tube to establish a second internal pressure P2 within the preformed tube and for a second period of time such that the outer surface of the tube conforms to the cavity of the hydroforming assembly; wherein P2 is greater than P1;
306: and releasing pressure and opening the hydroforming assembly to hydroform the pipe fitting.
2. The method of forming as claimed in claim 1, wherein said step 200 includes:
201: placing the bent pipe in a preformed lower die, and driving a die clamping process of a preformed upper die through a preformed press to obtain a preliminary preformed pipe fitting;
202: measuring the actual bending angle theta of the preliminary preformed pipe fitting, comparing the actual bending angle theta with a target angle, and adjusting the rotation angles of the upper die rebound adjusting block and the lower die rebound adjusting block according to the comparison result;
steps 201 and 202 are repeated until the actual bending angle θ of the preliminary preformed tube coincides with the target angle, and the preliminary preformed tube obtained at this time is taken as the preformed tube entering step 300.
3. The molding method according to claim 1, wherein P1 is 20 to 50MPa and the first time is 1 to 30 seconds; and/or P2 is 100-180 MPa, and the second time is 1-10 s.
4. The forming method of claim 1, wherein the hydroforming lower die comprises:
hydroforming a lower die base;
And the lower die insert is arranged on the hydroformed lower die base.
5. The forming method of claim 1, wherein the first end seal assembly and the second end seal assembly each comprise:
An end seal;
And feeding cylinders respectively connected with the end sealing pieces to drive the end sealing pieces to feed to the sealing stations.
6. The forming method according to claim 1, wherein the hydroforming upper die and the hydroforming lower die have a first guide sleeve and a first guide post therebetween that are adapted to each other.
7. The forming method according to claim 1, wherein the upper preformed mold and the lower preformed mold have a second guide sleeve and a second guide post therebetween that are adapted to each other.
8. The forming method of claim 1, wherein the pre-forming upper die comprises:
Pre-forming an upper die bottom plate;
a preformed upper die insert disposed on the preformed upper die base plate;
An upper die rebound adjustment block arranged on the preformed upper die bottom plate through a first rotating shaft perpendicular to the preformed upper die bottom plate;
the upper die rebound adjusting assembly applies force to the head end of the upper die rebound adjusting block so as to drive the upper die rebound adjusting block to rotate on the preformed upper die bottom plate by taking the first rotating shaft as a rotating shaft;
the upper die fixing assembly is used for fixing the upper die rebound adjusting block after the upper die rebound adjusting block completes rotation;
the lower preform mold includes:
preforming a lower die bottom plate;
a preformed lower die insert disposed on the preformed lower die base plate;
the lower die rebound adjusting block is arranged on the preformed lower die bottom plate through a second rotating shaft perpendicular to the preformed lower die bottom plate;
the lower die rebound adjusting assembly applies force to the head end of the lower die rebound adjusting block so as to drive the lower die rebound adjusting block to rotate on the preformed lower die bottom plate by taking the second rotating shaft as a rotating shaft;
and the lower die fixing assembly is used for fixing the lower die rebound adjusting block after the lower die rebound adjusting block completes rotation.
9. The method of forming of claim 8 wherein end stops are provided adjacent to the preformed lower die insert.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101772433A (en) * | 2007-07-25 | 2010-07-07 | Posco公司 | Tubular torsion beam for rear suspensions of vehicles and manufacturing method thereof |
| CN105880332A (en) * | 2015-01-26 | 2016-08-24 | 上海宝钢高新技术零部件有限公司 | Hydraulic hollow tube springback control method and device |
| CN109304388A (en) * | 2017-07-28 | 2019-02-05 | 上海宝钢高新技术零部件有限公司 | Bending press and method in a kind of curved part mould of hydroforming four |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100645587B1 (en) * | 2005-04-20 | 2006-11-14 | 현대자동차주식회사 | Spring back setting device of preforming mold |
| JP5668698B2 (en) * | 2012-01-24 | 2015-02-12 | 新日鐵住金株式会社 | Tube forming apparatus and method |
| CN102658332B (en) * | 2012-05-25 | 2014-12-10 | 烟台泰利汽车模具股份有限公司 | Mould and method for forming U-shaped member |
| CN105312372A (en) * | 2014-08-05 | 2016-02-10 | 上海宝钢高新技术零部件有限公司 | Car auxiliary frame and forming method |
| CN104438541A (en) * | 2014-12-08 | 2015-03-25 | 无锡朗贤汽车组件研发中心有限公司 | Inflatable hot forming tube-producing equipment |
| CN105149411A (en) * | 2015-08-28 | 2015-12-16 | 卡斯马汽车系统(上海)有限公司 | Hydraulic forming device and method for steel pipe material |
| CN109604436B (en) * | 2018-11-29 | 2020-11-03 | 湖北三江航天江北机械工程有限公司 | Method for forming variable-section special-shaped single tube of thrust chamber body part of liquid rocket engine |
| CN111434406A (en) * | 2019-01-14 | 2020-07-21 | 无锡朗贤轻量化科技股份有限公司 | Flexible beam oil cylinder/spiral locking pipe fitting or section hydraulic forming workstation die |
| US11752535B2 (en) * | 2019-03-04 | 2023-09-12 | Intelligent Aerospace Manufacturing Technology (Beijing) Co., Ltd. | Hot metal gas forming and quenching system and process therefor |
-
2020
- 2020-11-13 CN CN202011266297.8A patent/CN114472666B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101772433A (en) * | 2007-07-25 | 2010-07-07 | Posco公司 | Tubular torsion beam for rear suspensions of vehicles and manufacturing method thereof |
| CN105880332A (en) * | 2015-01-26 | 2016-08-24 | 上海宝钢高新技术零部件有限公司 | Hydraulic hollow tube springback control method and device |
| CN109304388A (en) * | 2017-07-28 | 2019-02-05 | 上海宝钢高新技术零部件有限公司 | Bending press and method in a kind of curved part mould of hydroforming four |
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