CN105583271A - Solid solution-bending-aging forming device and method for vehicle body aluminum alloy pipe - Google Patents
Solid solution-bending-aging forming device and method for vehicle body aluminum alloy pipe Download PDFInfo
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- CN105583271A CN105583271A CN201610156119.7A CN201610156119A CN105583271A CN 105583271 A CN105583271 A CN 105583271A CN 201610156119 A CN201610156119 A CN 201610156119A CN 105583271 A CN105583271 A CN 105583271A
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 24
- 239000007787 solid Substances 0.000 title claims abstract description 13
- 238000005452 bending Methods 0.000 claims abstract description 100
- 238000010438 heat treatment Methods 0.000 claims abstract description 49
- 230000007246 mechanism Effects 0.000 claims abstract description 31
- 230000006698 induction Effects 0.000 claims abstract description 29
- 239000000498 cooling water Substances 0.000 claims abstract description 10
- 238000010791 quenching Methods 0.000 claims abstract description 10
- 230000000171 quenching effect Effects 0.000 claims abstract description 10
- 230000003068 static effect Effects 0.000 claims description 25
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 239000006104 solid solution Substances 0.000 claims description 15
- 230000032683 aging Effects 0.000 claims description 7
- 238000005299 abrasion Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000001816 cooling Methods 0.000 description 6
- 239000007921 spray Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000001360 synchronised effect Effects 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
- B21D9/00—Bending tubes using mandrels or the like
- B21D9/05—Bending tubes using mandrels or the like co-operating with forming members
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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
- B21D9/00—Bending tubes using mandrels or the like
- B21D9/01—Bending tubes using mandrels or the like the mandrel being flexible and engaging the entire tube length
- B21D9/03—Bending tubes using mandrels or the like the mandrel being flexible and engaging the entire tube length and built-up from loose elements, e.g. series of balls
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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
- B21D9/00—Bending tubes using mandrels or the like
- B21D9/16—Auxiliary equipment, e.g. machines for filling tubes with sand
- B21D9/18—Auxiliary equipment, e.g. machines for filling tubes with sand for heating or cooling of bends
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention discloses a solid solution-bending-aging forming device and method for a vehicle body aluminum alloy pipe. The device comprises a heating mechanism and a bending mechanism. The heating mechanism comprises an induction coil and a high-frequency power source. The induction coil is arranged on the periphery of a bent part of the pipe in a sleeving mode and connected with the high-frequency power source. The bending mechanism comprises a bending die, a fixed clamp block, a crease-resistant block, movable clamp blocks and a rigid/flexible core die. The bent part of the pipe is placed on the bending die. One end of the pipe is clamped on the bending die through the fixed clamp block and the crease-resistant block, and the other end of the pipe is clamped by the movable clamp blocks. The rigid/flexible core die is arranged in the pipe. The fixed clamp block, the crease-resistant block and the movable clamp block are designed in a split mode, and the bending die is designed in an insert mode, so that water channels are processed conveniently and replacement after abrasion is convenient. The bending die, the fixed clamp block, the crease-resistant block and the movable clamp blocks are all internally provided with serpentine channels used for introducing cooling water. The solid solution-bending-aging forming device and method for the vehicle body aluminum alloy pipe can significantly improve the strength, the hardness and the forming precision of aluminum alloy pipes, and the springback problem of the pipes after bending and quenching is effectively solved.
Description
Technical Field
The invention relates to a metal heat treatment forming method, in particular to a device and a method for forming an aluminum alloy pipe fitting of a vehicle body through solid solution, bending and aging.
Background
Modern automobiles develop towards light weight, intellectualization and high performance, and new requirements are provided for materials, automobile aluminum alloying is an important way for light weight of automobiles, and energy can be effectively saved and environmental pollution can be reduced after the automobiles are lightened. Aluminum alloys and their processed materials have a series of excellent characteristics such as small density, high specific strength and specific stiffness, good elasticity, good impact resistance, corrosion resistance, wear resistance, high thermal conductivity, good process formability, and high recycling reproducibility.
The bending processing of the pipe plays an important role in the industrial departments of metal mechanisms, engineering machinery, power machinery, automobile industry, petrochemical industry, aerospace and the like. With the trend of light weight, high performance and low cost, the requirements on the bent pipe are higher and higher, and the requirements on larger diameter-thickness ratio (the ratio of the diameter D to the wall thickness t), smaller bending radius (the ratio of the radius R0 of the neutral layer of the bent pipe to the diameter D of the pipe) and higher forming precision are required. By adopting the ultra-thin pipe fitting with small curvature radius, the weight can be reduced, the light weight is realized, the arrangement structure of the pipeline system can be compact, and the cost is saved. However, when the conventional elbow forming process is adopted to bend the pipe, due to the particularity and complexity of geometric deformation, the defects of thinning outside, wrinkling inside, cross section distortion, springback and the like are easy to occur, and the quality of the elbow is affected.
The heating pipe bending process is a pipe bending process which is continuously carried out by heating, bending and cooling, and is a new process method for preventing and treating the distortion of the section shape and the uneven wall thickness of the pipe. When the heating elbow is formed, the tube blank is locally heated to the required temperature by means of induction current, then the heating part is bent, and then quenching treatment is carried out after the bending, so that the required elbow fitting is obtained. Compared to conventional heating devices, induction heating has many advantages: adopts a non-contact heating mode, has high heating temperature, and is safe and efficient. The heating speed is high, the temperature is easy to control, and the product quality is stable. The limitation on the condition of heating the workpiece is less, and the automatic control is easy to realize.
At present, the method for heating the bent pipe generally comprises the steps of performing induction heating bending on the pipe, and then performing water spraying cooling on the pipe to perform quenching treatment so as to obtain the required bent pipe. However, when water spray cooling is adopted, soft spots are often generated due to insufficient cooling because of the reasons of insufficient water spray pressure, insufficient water spray time, improper water spray hole arrangement, inconsistent spray angle, blockage of the spray holes and the like; meanwhile, because the cooling speed is too high, the inside of the pipe is easy to generate larger internal stress to cause quenching deformation or cracks, and the forming quality of the pipe is influenced.
Disclosure of Invention
In order to solve the technical problems, the invention provides a device and a method for forming an aluminum alloy pipe fitting of a vehicle body through solid solution, bending and aging.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a solid solution-bending-aging forming device for an aluminum alloy pipe fitting of a vehicle body comprises a heating mechanism and a bending mechanism; wherein,
the heating mechanism comprises an induction coil and a high-frequency power supply, the induction coil is sleeved on the periphery of the bent part of the pipe fitting and is connected with the high-frequency power supply, and the high-frequency power supply is used for heating the bent part of the pipe fitting to a solid solution temperature;
crooked mechanism includes bending die, quiet clamp splice, crease-resistant piece, moves the clamp splice, supports mandrel and crooked auxiliary push mechanism, the flexion of pipe fitting is placed on bending die, the one end of pipe fitting is pressed from both sides on bending die by quiet clamp splice and crease-resistant piece, crooked auxiliary push mechanism sets up the one end terminal surface department at the pipe fitting for promote the pipe fitting and remove to the other end, the other end of pipe fitting is pressed from both sides tightly by moving the clamp splice, it sets up the flexion that is used for supporting the pipe fitting in the pipe fitting to support the mandrel, all offer the serpentine channel who is used for logical cooling water in bending die, quiet clamp splice, crease-resistant piece and the motion clamp splice.
According to the technical scheme, the support core mold is a core rod, the core rod comprises a core shaft and a core ball hinged with the core shaft, and the outer diameters of the core shaft and the core ball are equal.
According to the technical scheme, the number of the core balls is 1-3, and the adjacent core balls are connected in series through hinges.
According to the technical scheme, the support core mold is filled with steel balls which are filled in the inner cavity of the pipe fitting and have different quantities and sizes, and the two ends of the pipe fitting are provided with seals.
According to the technical scheme, the diameter of the steel ball is less than or equal to 4 mm.
According to the technical scheme, the bending die is of an insert type structure and comprises a fixing piece and a bending piece which is embedded in the fixing piece and used for supporting the bending part of the pipe fitting, and a serpentine channel used for allowing cooling water to pass through is arranged on the bending piece.
According to the technical scheme, the static clamping block, the crease-resistant block and the movable clamping block are of split structures and respectively comprise two inner arc-shaped tubular columns and two outer arc-shaped tubular columns which are tightly attached together, corresponding semicircular serpentine channels are formed in the surfaces of the inner arc-shaped tubular columns, which are contacted with the outer arc-shaped tubular columns, and the two semicircular serpentine channels are combined into a complete serpentine channel.
Correspondingly, the invention provides a solid solution-bending-aging forming method for an aluminum alloy pipe fitting of a vehicle body, which comprises the following steps:
s1, placing the bent part of the pipe fitting on a bending die, clamping one end of the pipe fitting through a static clamping block and a crease-resistant block, clamping the other end of the pipe fitting through a movable clamping block, placing a support core die in the bent part of the pipe fitting, and sleeving an induction coil on the periphery of the bent part of the pipe fitting;
s2, adjusting the high-frequency power of the high-frequency power supply, and heating the bent part of the pipe fitting to a solid solution temperature through the induction coil by using the high-frequency power supply;
s3, axially pressurizing the other end of the pipe fitting through the movable clamping block, and simultaneously pushing the pipe fitting to move towards the other end by the bending auxiliary pushing mechanism to enable the bent part of the pipe fitting after heating and solid solution to be bent and formed around the bending die, wherein the bending die is kept static in the forming process;
s4, after the bent part of the pipe fitting is bent and formed, cooling water is introduced into the static clamping block, the dynamic clamping block, the crease-resistant block and the serpentine channel in the bending die to realize quenching treatment of the pipe fitting;
and S5, carrying out aging treatment on the quenched pipe fitting.
According to the technical scheme, the diameter-thickness ratio of the pipe fitting is larger than 50.
According to the technical scheme, the bending radius of the bending part of the pipe fitting is smaller than 1.5 times of the outer diameter of the pipe fitting.
The invention has the following beneficial effects: according to the invention, the pipe fitting with the support core die arranged in the pipe is subjected to induction heating through the high-frequency power supply and the induction coil, so that the pipe fitting can be heated to a solid solution temperature to be convenient for bending and forming, and the support core die can play a good heat storage role, the cooling speed of the pipe fitting can be effectively reduced, and the forming quality is improved; the pipe after heating and solid solution is subjected to synchronous numerical control bending through the bending mechanism, so that the complexity of the bending shape of the aluminum alloy pipe can be improved, the thinning amount of the thickness of the outer side wall of the pipe is reduced, and the instability wrinkling defect of the inner layer of the pipe during bending is effectively relieved; then, the pipe is quenched and artificially aged in the die, so that the strength, hardness and forming precision of the aluminum alloy pipe can be obviously improved, the problem of resilience after bending and quenching of the pipe is effectively solved, the solid solution-bending-aging forming integrated treatment of the aluminum alloy pipe of the automobile body is realized, the forming process can be shortened, the forming efficiency is improved, and the cost is reduced.
Drawings
The invention will be further explained with reference to the accompanying drawings and examples, wherein the static clamping block, the crease-resist block and the dynamic clamping block are similar in structure, hereinafter referred to as clamping block die, and in the drawings:
FIG. 1 is a schematic structural diagram of a first embodiment of the present invention;
FIG. 2 is a schematic view of a first embodiment of the present invention showing the placement of a mandrel within a tube;
FIG. 3 is a schematic view of a first embodiment of the present invention illustrating induction heating of a tubular member with a mandrel inserted therein;
FIG. 4a is a schematic structural view of a stationary block according to a first embodiment of the present invention;
FIG. 4b is a schematic structural view of the outer curved pipe string of FIG. 4 a;
FIG. 4c is a schematic diagram of the inner curved string of FIG. 4 a;
FIG. 5a is a schematic structural view of a bending die in a first embodiment of the present invention;
FIG. 5b is a schematic view of the structure of the bending member of the bending die in the first embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a second embodiment of the present invention;
FIG. 7 is a schematic structural diagram of steel balls filled in a pipe member according to a second embodiment of the present invention;
fig. 8 is a schematic structural diagram of induction heating of the pipe filled with the steel balls in the second embodiment of the invention.
In the figure: 1-static clamping block, 101-outer arc pipe column, 102-inner arc pipe column, 2-core rod, 201-core shaft, 202-core ball, 203-hinge, 3-pipe fitting, 4-dynamic clamping block, 5-bending die, 501-fixing piece, 502-bending piece, 6-crease-resisting block, 7-serpentine channel, 8-seal, 9-steel ball, 10-steel wire rope and 11-induction coil.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
A solid solution-bending-aging forming device for an aluminum alloy pipe fitting of a vehicle body comprises a heating mechanism and a bending mechanism; wherein,
as shown in fig. 3 and 8, the heating mechanism includes an induction coil 11 and a high-frequency power supply, the induction coil 11 is sleeved on the periphery of the bent portion of the pipe, the induction coil 11 is connected with the high-frequency power supply, and the high-frequency power supply is used for heating the bent portion of the pipe 3 to a solid solution temperature;
as shown in fig. 1 and 6, the bending mechanism comprises a bending die 5, a static clamping block 1, a crease-resistant block 6, a movable clamping block 4, a support core die and a bending auxiliary pushing mechanism (not marked in the figures), the bending portion of the pipe fitting is placed on the bending die 5, one end of the pipe fitting is clamped on the bending die 5 by the static clamping block 1 and the crease-resistant block 6, the bending auxiliary pushing mechanism is arranged at the end face of one end of the pipe fitting and used for pushing the pipe fitting to move towards the other end, the other end of the pipe fitting is clamped by the movable clamping block 4, the flexible core die is arranged in the pipe fitting and used for supporting the bending portion of the pipe fitting, and serpentine channels 7 used for cooling water communication are arranged in the bending die, the static clamping block.
In the preferred embodiment of the present invention, as shown in fig. 1-3, the support core mold is a core rod 2, the core rod 2 comprises a core shaft 201 and a core ball 202 hinged to the core shaft 201, and the outer diameters of the core shaft 201 and the core ball 202 are equal.
In a preferred embodiment of the present invention, as shown in fig. 1 to 3, the number of core balls 202 is 1 to 3, specifically 3, and adjacent core balls 202 are connected in series by a hinge 203.
In the preferred embodiment of the invention, as shown in figures 6 to 8, the support mandrels are different numbers of different sizes of steel balls 9 which fill the interior of the pipe and seals 8 are provided at both ends of the pipe.
In the preferred embodiment of the invention, as shown in FIGS. 6-8, the diameter of the steel ball 9 is less than or equal to 4 mm.
In the preferred embodiment of the present invention, as shown in fig. 5a and 5b, the bending die 5 includes a fixing member 501 and a bending member 502 embedded in the fixing member 501 for supporting the bent portion of the pipe, and the bending member 502 is provided with a serpentine channel 7 for passing cooling water. The bending die adopts an insert type design, is convenient to replace in time after being worn, and keeps still in the bending process of the pipe fitting.
In the preferred embodiment of the present invention, as shown in fig. 4a, 4b, and 4c, the static clamping block, the anti-crease block, and the dynamic clamping block are all split structures, and taking the static clamping block as an example, the static clamping block includes two inner arc-shaped pipe columns 102 and two outer arc-shaped pipe columns 101 closely attached together, corresponding semicircular serpentine channels are disposed on the surfaces of the inner arc-shaped pipe columns and the outer arc-shaped pipe columns, and the two semicircular serpentine channels are combined into a complete serpentine channel. The static clamping block, the anti-crease block and the movable clamping block adopt a split type design, so that a certain part can be conveniently replaced after being worn.
A solid solution-bending-aging forming method for an aluminum alloy pipe of a vehicle body comprises the following steps:
s1, placing the bent part of the pipe fitting on a bending die, clamping one end of the pipe fitting through a static clamping block and a crease-resistant block, clamping the other end of the pipe fitting through a movable clamping block, placing a support core die in the bent part of the pipe fitting, and sleeving an induction coil on the periphery of the bent part of the pipe fitting;
s2, adjusting the high-frequency power of the high-frequency power supply, and heating the bent part of the pipe fitting to a solid solution temperature through the induction coil by using the high-frequency power supply;
s3, axially pressurizing the other end of the pipe fitting through the movable clamping block, and simultaneously pushing the pipe fitting to move towards the other end by the bending auxiliary pushing mechanism to enable the bent part of the pipe fitting after heating and solid solution to be bent and formed around the bending die, wherein the bending die is kept static in the forming process;
s4, after the bent part of the pipe fitting is bent and formed, cooling water is introduced into the static clamping block, the dynamic clamping block, the crease-resistant block and the serpentine channel in the bending die to realize quenching treatment of the pipe fitting;
and S5, carrying out aging treatment on the quenched pipe fitting.
In a preferred embodiment of the invention, the tube has a ratio of diameter to thickness of greater than 50.
In a preferred embodiment of the invention the bend radius of the pipe bend is less than 1.5 times the outer diameter of the pipe.
The present invention is specifically illustrated below with respect to two examples.
The support mandrel in example 1 is a rigid mandrel.
As shown in fig. 1-3, a method for forming an aluminum alloy pipe of a vehicle body by solid solution-bending-aging comprises the following steps:
s1, the aluminum alloy pipe fitting is made of 2A12, the diameter of the pipe fitting is 80mm, the thickness of the pipe fitting is 1mm (namely the diameter-thickness ratio is 80), the length of the pipe fitting is 500mm, the bending radius of the bending part is 120mm, the outer diameters of the mandrel and the core ball are 78mm, the core ball is arranged in a mode that the core ball is connected on the mandrel in series through a hinge, the mandrel is placed into the pipe fitting, and an induction coil is sleeved on the periphery of the part, to be bent, of the pipe fitting;
s2, adjusting the high-frequency power of the high-frequency power supply according to the requirements of the pipe fitting specification, the wall thickness and the like, carrying out circumferential heating on the bent part of the pipe fitting through the induction coil by using the high-frequency power supply, and withdrawing the induction coil when the pipe fitting is heated to 500 +/-5 ℃;
s3, performing numerical control bending forming on the pipe after heating and solid solution by using a bending mechanism, namely performing numerical control bending forming on the pipe by using a static clamping block, a crease-resist block, a movable clamping block and a bending die, pushing the pipe to move towards the other end by using a bending auxiliary pushing mechanism (so as to reduce the thinning amount of the bent part of the pipe), and keeping the bending die static in the forming process;
s4, after the bending forming is finished, water is supplied to the static clamping block, the dynamic clamping block, the crease-resistant block and the snake-shaped channel in the bending piece of the bending die so as to realize the quenching treatment of the pipe fitting;
s5, carrying out aging treatment on the quenched aluminum alloy pipe fitting, and finally obtaining the ultrathin aluminum alloy pipe fitting with smooth inner side and no wrinkling phenomenon and without defects of cracking and the like on the outer side.
The support core mold in example 2 is a rigid steel ball.
As shown in fig. 6-8, a method for forming an aluminum alloy pipe of a vehicle body by solid solution-bending-aging comprises the following steps:
s1, the aluminum alloy pipe fitting is made of 2A12, the diameter of the pipe fitting is 80mm, the thickness of the pipe fitting is 1mm (namely the diameter-thickness ratio is 80), the length of the pipe fitting is 500mm, the bending radius of the bending part is 120mm, small steel balls with different quantities and sizes are filled into the pipe fitting (the diameter of the steel balls is less than or equal to 4mm), the two ends of the pipe fitting are sealed through a steel wire rope 10, and an induction coil is sleeved on the periphery of the part to be bent of the pipe fitting;
s2, adjusting high-frequency power according to the requirements of pipe specification, wall thickness and the like, carrying out circumferential heating on the to-be-bent area of the pipe through an induction coil by using a high-frequency power supply, and withdrawing the induction coil when the pipe is heated to 500 +/-5 ℃;
s3, performing numerical control bending forming on the pipe after heating and solid solution by using a bending mechanism, namely performing numerical control bending forming on the pipe by using a static clamping block, a crease-resist block, a movable clamping block and a bending die, and pushing the pipe to move towards the other end by using a bending auxiliary pushing mechanism so that the bending die keeps static in the forming process;
s4, after the bending forming is finished, water is supplied to the static clamping block, the dynamic clamping block, the crease-resistant block and the snake-shaped channel in the bending piece of the bending die so as to realize the quenching treatment of the pipe fitting;
s5, carrying out aging treatment on the quenched aluminum alloy pipe fitting;
and S6, opening seals at two ends of the pipe fitting, pouring out the steel balls, and recycling the steel balls.
The induction heating frequency in the present invention is selected according to the requirements of heat treatment and heating depth, and the higher the frequency, the shallower the heating depth, for example: a. the depth of high-frequency (more than 10KHZ) heating is 0.5-2.5mm, and the high-frequency heating device is generally used for heating medium and small parts. (ii) a b. The medium frequency (1-10KHZ) heating depth is 2-10mm, and the medium frequency heating device is generally used for heating shafts with large diameters and gears with large and medium modulus; c. the depth of the industrial frequency (50HZ) heating hardening layer is 10-20mm, and the method is generally used for diathermanous of parts with larger sizes and surface hardening of parts with large diameters.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (10)
1. A solid solution-bending-aging forming device for an aluminum alloy pipe fitting of a vehicle body is characterized by comprising a heating mechanism and a bending mechanism; wherein,
the heating mechanism comprises an induction coil and a high-frequency power supply, the induction coil is sleeved on the periphery of the bent part of the pipe fitting and is connected with the high-frequency power supply, and the high-frequency power supply is used for heating the bent part of the pipe fitting to a solid solution temperature;
crooked mechanism includes bending die, quiet clamp splice, crease-resistant piece, moves the clamp splice, supports mandrel and crooked auxiliary push mechanism, the flexion of pipe fitting is placed on bending die, the one end of pipe fitting is pressed from both sides on bending die by quiet clamp splice and crease-resistant piece, crooked auxiliary push mechanism sets up the one end terminal surface department at the pipe fitting for promote the pipe fitting and remove to the other end, the other end of pipe fitting is pressed from both sides tightly by moving the clamp splice, it sets up the flexion that is used for supporting the pipe fitting in the pipe fitting to support the mandrel, all offer the serpentine channel who is used for logical cooling water in bending die, quiet clamp splice, crease-resistant piece and the motion clamp splice.
2. The apparatus of claim 1, wherein the support mandrel is a mandrel comprising a mandrel and a mandrel ball hingedly connected to the mandrel, the mandrel and the mandrel ball having an outer diameter equal to the outer diameter of the mandrel ball.
3. The device according to claim 2, wherein the number of the core balls is 1-3, and adjacent core balls are connected in series through a hinge.
4. The apparatus of claim 1 wherein the support mandrel is a varying number of different sized steel balls filling the interior cavity of the pipe, the pipe having seals at both ends.
5. The device of claim 4, wherein the steel ball has a diameter of 4mm or less.
6. The device according to claim 1, wherein the bending die is an insert type structure, and comprises a fixing piece and a bending piece embedded on the fixing piece and used for supporting the bending part of the pipe fitting, and a serpentine channel for introducing cooling water is arranged on the bending piece.
7. The device according to claim 1, wherein the static clamping block, the crease-resistant block and the dynamic clamping block are of split structures and respectively comprise an inner arc-shaped pipe column and an outer arc-shaped pipe column which are tightly attached together, corresponding semicircular serpentine channels are formed in the contact surfaces of the inner arc-shaped pipe column and the outer arc-shaped pipe column, and the two semicircular serpentine channels are combined into a complete serpentine channel.
8. A solid solution-bending-aging forming method for an aluminum alloy pipe of a vehicle body is characterized by comprising the following steps:
s1, placing the bent part of the pipe fitting on a bending die, clamping one end of the pipe fitting through a static clamping block and a crease-resistant block, clamping the other end of the pipe fitting through a movable clamping block, placing a support core die in the bent part of the pipe fitting, and sleeving an induction coil on the periphery of the bent part of the pipe fitting;
s2, adjusting the high-frequency power of the high-frequency power supply, and heating the bent part of the pipe fitting to a solid solution temperature through the induction coil by using the high-frequency power supply;
s3, axially pressurizing the other end of the pipe fitting through the movable clamping block, and simultaneously pushing the pipe fitting to move towards the other end by the bending auxiliary pushing mechanism to enable the bent part of the pipe fitting after heating and solid solution to be bent and formed around the bending die, wherein the bending die is kept static in the forming process;
s4, after the bent part of the pipe fitting is bent and formed, cooling water is introduced into the static clamping block, the dynamic clamping block, the crease-resistant block and the serpentine channel in the bending die to realize quenching treatment of the pipe fitting;
and S5, carrying out aging treatment on the quenched pipe fitting.
9. The method of claim 8, wherein the pipe has a aspect ratio greater than 50.
10. The method of claim 8, wherein the bend radius of the tube bend is less than 1.5 times the outer diameter of the tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610156119.7A CN105583271B (en) | 2016-03-18 | 2016-03-18 | Vehicle body Aluminum Alloy Tube solid solution-bending-age forming device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610156119.7A CN105583271B (en) | 2016-03-18 | 2016-03-18 | Vehicle body Aluminum Alloy Tube solid solution-bending-age forming device and method |
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| CN105583271A true CN105583271A (en) | 2016-05-18 |
| CN105583271B CN105583271B (en) | 2018-09-11 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106345869A (en) * | 2016-08-31 | 2017-01-25 | 北京星航机电装备有限公司 | Method and device for forming large-pipe-diameter small-bending-radius thin-wall conduit |
| CN108311568A (en) * | 2018-01-25 | 2018-07-24 | 刘春燕 | A kind of workpiece high efficiency bending technique |
| CN109092957A (en) * | 2018-06-29 | 2018-12-28 | 昆明理工大学 | A kind of shaft sleeve parts part thixoextruding method |
| CN109092958A (en) * | 2018-06-29 | 2018-12-28 | 昆明理工大学 | A kind of band shoulder pipe type element thixotropic forming method |
| CN109482686A (en) * | 2018-12-29 | 2019-03-19 | 重庆鑫劲宏景机械有限公司 | The hot bending equipment of Motorcycle Tube Frame |
| CN112139318A (en) * | 2020-09-09 | 2020-12-29 | 南昌航空大学 | Titanium alloy bending die and machining method thereof |
| CN113843322A (en) * | 2021-08-30 | 2021-12-28 | 王顺龙 | Annular new material processing equipment of buckling |
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| CN106345869A (en) * | 2016-08-31 | 2017-01-25 | 北京星航机电装备有限公司 | Method and device for forming large-pipe-diameter small-bending-radius thin-wall conduit |
| CN106345869B (en) * | 2016-08-31 | 2018-08-17 | 北京星航机电装备有限公司 | A kind of Large Diameter Pipeline small-bend radius thin-wallconduit manufacturing process and its device |
| CN108311568A (en) * | 2018-01-25 | 2018-07-24 | 刘春燕 | A kind of workpiece high efficiency bending technique |
| CN109092957A (en) * | 2018-06-29 | 2018-12-28 | 昆明理工大学 | A kind of shaft sleeve parts part thixoextruding method |
| CN109092958A (en) * | 2018-06-29 | 2018-12-28 | 昆明理工大学 | A kind of band shoulder pipe type element thixotropic forming method |
| CN109092957B (en) * | 2018-06-29 | 2020-05-15 | 昆明理工大学 | Local thixoextrusion method for shaft sleeve part |
| CN109092958B (en) * | 2018-06-29 | 2020-05-15 | 昆明理工大学 | Thixoforming method for pipe parts with shoulders |
| CN109482686A (en) * | 2018-12-29 | 2019-03-19 | 重庆鑫劲宏景机械有限公司 | The hot bending equipment of Motorcycle Tube Frame |
| CN112139318A (en) * | 2020-09-09 | 2020-12-29 | 南昌航空大学 | Titanium alloy bending die and machining method thereof |
| CN113843322A (en) * | 2021-08-30 | 2021-12-28 | 王顺龙 | Annular new material processing equipment of buckling |
| CN113843322B (en) * | 2021-08-30 | 2023-12-29 | 宁波市海曙宇众金属制品有限公司 | Annular new material processing equipment of buckling |
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