CN102814368A - Compound molding tool system for hot stretch bending and creep deformation of section bar and application method of compound molding tool system - Google Patents
Compound molding tool system for hot stretch bending and creep deformation of section bar and application method of compound molding tool system Download PDFInfo
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- CN102814368A CN102814368A CN2012103036453A CN201210303645A CN102814368A CN 102814368 A CN102814368 A CN 102814368A CN 2012103036453 A CN2012103036453 A CN 2012103036453A CN 201210303645 A CN201210303645 A CN 201210303645A CN 102814368 A CN102814368 A CN 102814368A
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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
- B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
- B21D11/02—Bending by stretching or pulling over a die
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Abstract
The invention relates to a compound molding tool system for hot stretch bending and creep deformation of a section bar. The compound molding tool system comprises a cantilever-type section bar stretch bender, a heating box, a self-resistance heating system, an electric control cabinet and a clamp, wherein the heating box is located on the working table of the middle part of the cantilever-type section bar stretch bender; the electric control cabinet is located in front of the cantilever-type section bar stretch bender and is connected with the cantilever-type section bar stretch bender; the self-resistance heating system is located at the periphery of the tool system; and the clamp is arranged on a cantilever of the cantilever-type section bar stretch bender. An application method of the compound molding tool system for the hot stretch bending and the creep deformation of the section bar comprises six steps. According to the compound molding tool system for the hot stretch bending and the creep deformation of the section bar, the hot stretch bending process of the creep deformation process of the section bar are compounded; the plastic deformation resistance of the section bar is reduced; and the residual stress after the section bar is processed is reduced, and thereby, resilience is reduced, and the molding precision and the structure stability are improved. Compared with products obtained by adopting a traditional stretch bending method, a final product obtained by the compound molding tool system is higher in quality, and the production efficiency is increased.
Description
Technical field
The present invention relates to curved creep combined shaping fixture system of a kind of section bar hot-drawn and method for using thereof, be applicable to the hot forming of section bars such as titanium alloy, belong to the metal hot processing field.
Background technology
Section bar stretch wrap forming technology has obtained using very widely in the manufacturing of aircraft and vehicle section bar bool.Stretch bending process is mainly used in the skeleton part such as bulkhead, stringer, reinforcement edge strip of shaping fuselage, wing, air intake duct in aircraft manufacturing; In automobile production, be mainly used in the hollow material bool of shaping body structure and bumper etc.
Along with the proposition that stealthy, the high maneuverability of aircraft of new generation and high reliability etc. require, the applied more and more of high-strength light materials such as titanium alloy, the requirement on machining accuracy of product improves day by day; The quick development and the low-cost characteristics of present generation aircraft require the process of part to reduce frock, operation and man-hour as far as possible simultaneously, reduce production costs, and enhance productivity.
Weak points such as traditional section bar stretch bending process existence needs many cover frocks, man-hour is long and resilience is big; In the curved material secondary of plate room temperature stretch bending heating straightening method, the attenuation of section bar thickness and thickness evenness are difficult to control, the many covers of needs frock (punching press upper and lower mould, stretch bending mould, school shape frock), frock cost height; Need multiple working procedure (drop stamping, twice room temperature stretch bending, hot school shape), the production cycle is long, and time cost is high.Heat gain press shaping die heating school shape technology then needs repeated heating, and a large amount of stress gradients of existence make very difficulty of part forming precision control.Heterogeneous deformation causes a large amount of residual stress to produce simultaneously, need carry out hot school shape and handle, and operation is many, is difficult to realize Accurate Shaping.The existence of residual stress also can cause deforming in the follow-up working angles in addition, influences final part precision.The curved heating of section bar hot-drawn school shape technology then can be used for be shaped by force low and high-strength titanium alloy section bar, but has following problem: the numerical controlization that is unrealized, can't realize the accurate control of amount of tension and rate of extension, and forming accuracy is poor; The temperature closed loop that is unrealized control, the part tissue is unstable.
The curved creep combined forming process of hot-drawn refers at first woolen cloth is heated to be fit to hot formed temperature range, through numerical control stretch wrap forming machine clamp it is applied pretension with certain strain rate then, afterwards woolen cloth coating mould under this pretension effect.Clamp is motionless behind the woollen subsides mould, makes woollen under the uniform temperature condition, the maintenance paste mould state certain hour, and the creep properties through material reduces resilience, realizes Accurate Shaping.Curved and the creep operation of numerical control hot-drawn that this technology is integrated, the high accuracy that can be used for the complicated high-strength titanium alloy section bar of large scale part is shaped.The advantage of this kind technology is: it is lax to exist in uniaxial stress, can significantly reduce resilience, improves forming accuracy and quality; Compoundization of forming process and integrated shortened the manufacturing cycle of part, reduced the manufacturing cost of part.
Summary of the invention
1, purpose: the objective of the invention is deficiency to prior art; Curved creep combined shaping fixture system of a kind of section bar hot-drawn and method for using thereof are provided, realize curved compound with creep process of section bar hot-drawn, the plastic deformation resistance who reduces section bar; Reduce the residual stress after section bar is processed; Thereby reduce resilience, improve forming accuracy and structure stability, the more traditional stretch bending method of the final products of acquisition has better quality and has improved production efficiency.
2, technical scheme:
1) the curved creep combined shaping fixture system of a kind of section bar hot-drawn of the present invention comprises overhang section bar stretch benders, heating cabinet, hinders heating system, electrical control cabinet and clamp certainly.Position annexation between them is: heating cabinet is positioned on the work top at overhang section bar stretch benders middle part; Electrical control cabinet is positioned at overhang section bar stretch benders the place ahead and is connected with overhang section bar stretch benders; Be positioned at system peripherals from the resistance heating system, clamp is installed on the stretching one's arms of overhang section bar stretch benders.
Said overhang section bar stretch benders are a kind of common section bar stretch wrap forming equipment; Its stationary table is in ground; Symmetrical stretching one's arms can be rotated by the bolt around workbench under pivoted arm stretches the drive of oil cylinder, on stretching one's arms slide block is installed, and clamp and stretching oil cylinder are installed on this slide block.
Said heating cabinet is fixed on the work top of overhang section bar stretch benders; Be the rectangle case structure, mainly comprise Qianmen, top panel, bottom panel, rear board, side panel, sideskid, guide rail, mould back seat, stretch bending mould, ceramic heat-insulation layer and assistant heating resistance wire.Position annexation between them is: the inwall of the Qianmen of heating cabinet, top panel and bottom panel is with ceramic heat-insulation layer, and top panel heat-insulation layer and bottom panel heat-insulation layer partly are embedded with the assistant heating resistance wire, are used for the assistant heating of section bar stretch bending process.The Qianmen is installed on the top panel, can upwardly open, and has aperture on the Qianmen, is used to measure the temperature of section bar.Two side panels and top panel and rear board are connected, and the side panel first half is an opening, and outer rim is with groove near the opening, and sideskid is positioned in this groove, and can before and after slide.Guide rail is fixed in the bottom panel both sides, and top panel, rear board and both sides panel can integral body move forward and backward on guide rail, is convenient to the installation or the replacing of mould back seat and stretch bending mould.The mould back seat is connected with the bottom panel heat-insulation layer through bolt.The stretch bending mould is positioned on the heating cabinet bottom panel heat-insulation layer, is connected through insulated bolt with the mould back seat, is separated with one deck mould insulating blanket between stretch bending mould and the mould back seat.This Qianmen, top panel, bottom panel, rear board, side panel and sideskid are the rectangle plate, and have slotted eye in the middle of the sideskid, supply to place section bar usefulness, and this sideskid is to opening mechanism, makes things convenient for the placement and the taking-up of section bar; This guide rail is the billot that is provided with groove, and this mould back seat is a square structure, has two fixing holes on it; This stretch bending mould is circular shape; This pottery heat-insulation layer and assistant heating resistance wire are the commercial products of choosing as required.
It is said that hindering heating system comprises electrical power control cabinet, transformer, heating copper conductor and copper conductor bracing frame certainly.They are connected to each other through cable.From the effect of resistance heating system is from the resistance heating electric current to be provided for section bar.This electrical power control cabinet is between workshop general supply and transformer, and main effect is for hindering heating system, assistant heating resistance wire and part control system certainly stabilized power source to be provided, and the electrical power control cabinet input voltage is the 380V commercial power, peak power 16KW.Transformer act as and converts high voltage source into low-voltage high-current power source between electrical power control cabinet and heating copper conductor, supplies section bar to use from the resistance heating, and this transformer is a single-phase transformer, and specified input voltage is 380V, and output voltage is 5～25V.The heating copper conductor is used to transmit section bar from hindering heating current between transformer and clamp, the effective cross section of this heating copper conductor is long-pending to be 1256mm
2The copper conductor bracing frame can be divided into three parts, and wherein a part is fixed on the overhang section bar stretch benders, and two parts are and are symmetrically arranged on the stretching one's arms of stretch benders in addition, and the bracing frame of symmetric arrangement can be with the rotation of stretching one's arms.
Said electrical control cabinet is positioned at overhang section bar stretch benders the place ahead, and is connected with overhang section bar stretch benders, and effect is in the stretch bending process, the motion of stretching one's arms and the temperature of section bar to be controlled accurately.
Said clamp is a tubular construction, mainly comprises clamp sleeve, clamp abaculus A, clamp abaculus B, clamp abaculus C, heating wires joint and clamp oil cylinder contiguous block, and the relation between them is: the clamp sleeve is that the profile of clamp contains member; Be core structure; Clamp abaculus A, clamp abaculus B, clamp abaculus C are positioned at the clamp sleeve inner, are connected with the clamp sleeve through bolt respectively, and the heating wires joint is through being bolted on the clamp abaculus C; And with the heating copper conductor be connected; Clamp oil cylinder contiguous block is positioned at clamp sleeve the inside, with clamp abaculus A, clamp abaculus B, clamp abaculus C embedding mutually, and links to each other with the stretch of stretching oil cylinder.The inwall of this clamp sleeve and clamp central axis are 10 ° of angles, and the heating wires joint bends with plate and forms, and this clamp oil cylinder contiguous block then is a disc-shaped structure.Clamp abaculus C comprises fixedly slide block, detachable slide block and clamp insulating blanket, and the clamp insulating blanket is fixedly between slide block and the detachable slide block, and the three is continuous through insulated bolt.The clamp insulating blanket is all L-shaped with detachable slide block; The clamp insulating blanket is by ceramic material, and detachable slide block is then processed by metal material, and fixedly slide block is the wedge structure that metal material is processed; The back has circular groove, is used for the embedding of clamp oil cylinder contiguous block.Fixedly slide block has cooling-water duct, to realize the cooling of clamp, prevents the operate as normal of temperatures involved system electric elements.
2) method for using of the curved creep combined shaping fixture system of a kind of section bar hot-drawn of the present invention, these method concrete steps are following:
The temperature control of above-mentioned steps is the control closed-loop control.
3, advantage and effect: the present invention utilizes the characteristics of material creep, integrated numerical control hot-drawn curved with the creep operation, make compoundization of forming process, utilize the online stress relaxation of creep process, thereby reduced the resilience of part, reduced the manufacturing cost of part; Forming accuracy and quality have been improved.
Description of drawings
Fig. 1 is the curved creep combined shaping fixture system overall schematic of a kind of section bar hot-drawn;
Sketch map when Fig. 2 is the unlatching of heating cabinet Qianmen;
Fig. 3 is a heating cabinet internal structure sketch map;
Fig. 4 is heating copper conductor and copper conductor bracing frame sketch map;
Fig. 5 is a clamp overall structure sketch map;
Fig. 6 is a clamp internal structure sketch map;
Fig. 7 is a sketch map before the section bar stretch wrap forming;
Fig. 8 is a section bar creep process sketch map;
Fig. 9 is the flow chart of the method for using of the curved creep combined shaping fixture system of a kind of section bar hot-drawn
The sequence number explanation is as follows among the figure:
1, heating cabinet 2, clamp 3, copper conductor bracing frame 4, transformer
5, electrical power control cabinet 6, heating copper conductor 7, overhang section bar stretch benders 8, electrical control cabinet
9, assistant heating resistance wire 10, bottom panel 11, bottom panel heat-insulation layer 12, stretch bending mould
13, survey slide plate 14, side panel 15, guide rail 16, top panel
17, Qianmen 18, Qianmen heat-insulation layer 19, thermometer hole 20, top panel heat-insulation layer
21, mould insulating blanket 22, mould back seat 23, bolt 24, rear board
25, section bar termination 26, clamp abaculus A 27, clamp abaculus B 28, clamp sleeve
29, clamp abaculus C 29A, fixedly slide block 29B, clamp insulating blanket 29C, detachable slide block
30, heating wires joint 31, bolt hole 32, cooling-water duct 33, clamp oil cylinder contiguous block
W, section bar
The specific embodiment
1) the curved creep combined shaping fixture system of a kind of section bar hot-drawn of the present invention comprises overhang section bar stretch benders 7, heating cabinet 1, hinders heating system, electrical control cabinet 8 and clamp 2 certainly, and is as shown in Figure 1.Position annexation between them is: heating cabinet 1 is positioned on the work top at overhang section bar stretch benders 7 middle parts; Electrical control cabinet 8 is positioned at overhang section bar stretch benders 7 the place aheads and is connected with overhang section bar stretch benders 7; Be positioned at system peripherals from the resistance heating system, clamp 2 is installed on the stretching one's arms of overhang section bar stretch benders 7.
Said overhang section bar stretch benders 7 are a kind of common section bar stretch wrap forming equipment; Its stationary table is in ground; Symmetrical stretching one's arms can be rotated by the bolt around workbench under the drive of the stretching oil cylinder of stretching one's arms, and on stretching one's arms slide block is installed, and clamp 2 and stretching oil cylinder are installed on this slide block.
Said heating cabinet 1 is fixed on the work top of overhang section bar stretch benders 7; Be the rectangle case structure; Mainly comprise Qianmen 17, top panel 16, bottom panel 10, rear board 24, side panel 14, sideskid 13, guide rail 15, mould back seat 22, stretch bending mould 12, ceramic heat-insulation layer and assistant heating resistance wire 9, as shown in Figure 2.Position annexation between them is: the inwall of the Qianmen 17 of heating cabinet, top panel 16 and bottom panel 10 is respectively with Qianmen heat-insulation layer 18, top panel heat-insulation layer 20 and bottom panel heat-insulation layer 11; Top panel heat-insulation layer 20 is embedded with assistant heating resistance wire 9 with bottom panel heat-insulation layer 11 half, is used for the assistant heating of section bar stretch bending process.Qianmen 17 is installed on the top panel 16, can upwardly open, and has aperture 19 on the Qianmen 17, is used to measure the temperature of section bar W.Two side panels 14 are connected with top panel 16 and rear board 24, and side panel 14 first halfs are opening, and outer rim is with groove near the opening, and sideskid 13 is positioned in this groove, and can slide front and back.Guide rail 15 is fixed in bottom panel 10 both sides, and top panel 16, rear board 24 and both sides panel 14 can integral body move forward and backward on guide rail 15, is convenient to the installation or the replacing of mould back seat 22 and stretch bending mould 12, and is as shown in Figure 3.Mould back seat 22 is connected with bottom panel heat-insulation layer 11 through bolt 23.Stretch bending mould 12 is positioned on the bottom panel heat-insulation layer 11 of heating cabinet 1, is connected through insulated bolt with mould back seat 22, is separated with one deck insulating blanket 21 between stretch bending mould 12 and the mould back seat 22.This Qianmen 17, top panel 16, bottom panel 10, rear board 24, side panel 14 and sideskid 13 are the rectangle plate, and have slotted eye in the middle of the sideskid 13, supply to place section bar W usefulness, and this sideskid 13 is to opening mechanism, makes things convenient for placement and the taking-up of section bar W; This guide rail 15 is the billots that are provided with groove, and this mould back seat 22 is a square structure, has two fixing holes on it; This stretch bending mould 12 is circular shape; This pottery heat-insulation layer and assistant heating resistance wire 9 are commercial products of choosing as required.
The said heating system that hinders certainly comprises electrical power control cabinet 8, transformer 4, heating copper conductor 6 and copper conductor bracing frame 3.They are connected to each other through cable.From the effect of resistance heating system is from the resistance heating electric current to be provided for section bar W.This electrical power control cabinet 8 is between workshop general supply and transformer 4, and main effect is for hindering heating system, assistant heating resistance wire 9 and part control system certainly stabilized power source to be provided, and the input voltage of electrical power control cabinet 8 is the 380V commercial power, peak power 16KW.Transformer position 4 act as and converts high voltage source into low-voltage high-current power source between electrical power control cabinet 8 and heating copper conductor 6, supplies section bar W to use from the resistance heating, and this transformer 4 is a single-phase transformer, and specified input voltage is 380V, and output voltage is 5～25V.Heating copper conductor 6 is used to transmit section bar W from hindering heating current between transformer 4 and clamp 2, the effective cross section of this heating copper conductor 6 is long-pending to be 1256mm2.Copper conductor bracing frame 3 can be divided into three parts, and wherein a part is fixed on the stretch benders, and two parts are and are symmetrically arranged on the stretching one's arms of overhang section bar stretch benders 7 in addition, and the bracing frame of symmetric arrangement can be with the rotation of stretching one's arms, and is as shown in Figure 4.
Said electrical control cabinet 8 is positioned at overhang section bar stretch benders 7 the place aheads, is connected with overhang section bar stretch benders 7, and effect is in the stretch bending process, the motion of stretching one's arms and the temperature of section bar W to be controlled accurately.
Said clamp 2 is a tubular construction, mainly comprises clamp sleeve 28, clamp abaculus A26, clamp abaculus B27, clamp abaculus C29, heating wires joint 30 and clamp oil cylinder contiguous block 33, and is as shown in Figure 5.Relation between them is: clamp sleeve 28 is that the profile of clamp 2 contains member; Be core structure; Clamp abaculus A26, clamp abaculus B27, clamp abaculus C29 are positioned at clamp sleeve 28 inside, are connected with clamp sleeve 28 through bolt respectively, and heating wires joint 30 is through being bolted on the clamp abaculus C29; And with the heating copper conductor 6 be connected; Clamp oil cylinder contiguous block 33 is positioned at clamp sleeve 28 the insides, with clamp abaculus A26, clamp abaculus B27, clamp abaculus C29 embedding mutually, and links to each other with the stretch of oil cylinder.The inwall of this clamp sleeve 28 and clamp central axis are 10 ° of angles, and heating wires joint 30 usefulness plates bend and form, and this 33 of clamp oil cylinder contiguous block is the round pie structure.Clamp abaculus C29 comprises fixedly slide block 29A, detachable slide block 29C and clamp insulating blanket 29B, and is as shown in Figure 6.Clamp insulating blanket 29B is between fixing slide block 29A and detachable slide block 29C, and the three links to each other through insulated bolt.Clamp insulating blanket 29B is all L-shaped with detachable slide block 29C; Clamp insulating blanket 29B is by ceramic material; Detachable slide block 29C is then processed by metal material; Fixedly slide block 29A is the wedge structure that metal material is processed, and the back has circular groove, is used for the embedding of clamp oil cylinder contiguous block 33.Fixedly slide block 29A has cooling-water duct 32, to realize the cooling of clamp 2, prevents the operate as normal of temperatures involved system electric elements.
2) method for using of the curved creep combined shaping fixture system of a kind of section bar hot-drawn of the present invention, these method concrete steps are following:
The said method step is as shown in Figure 9, and the temperature control in the forming process is the numerical control closed-loop control.
Claims (2)
1. the curved creep combined shaping fixture system of a section bar hot-drawn is characterized in that: it comprises overhang section bar stretch benders, heating cabinet, hinders heating system, electrical control cabinet and clamp certainly; Heating cabinet is positioned on the work top at overhang section bar stretch benders middle part; Electrical control cabinet is positioned at overhang section bar stretch benders the place ahead and is connected with overhang section bar stretch benders; Be positioned at system peripherals from the resistance heating system, clamp is installed on the stretching one's arms of overhang section bar stretch benders;
Said overhang section bar stretch benders are a kind of commercial section bar stretch wrap forming equipment; Its stationary table is in ground; Symmetrical stretching one's arms can be rotated by the bolt around workbench under pivoted arm stretches the drive of oil cylinder, on stretching one's arms slide block is installed, and clamp and stretching oil cylinder are installed on this slide block;
Said heating cabinet is fixed on the work top of overhang section bar stretch benders; Be the rectangle case structure, comprise Qianmen, top panel, bottom panel, rear board, side panel, sideskid, guide rail, mould back seat, stretch bending mould, ceramic heat-insulation layer and assistant heating resistance wire; The inwall of the Qianmen of heating cabinet, top panel and bottom panel is with ceramic heat-insulation layer, and top panel heat-insulation layer and bottom panel heat-insulation layer partly are embedded with the assistant heating resistance wire, are used for the assistant heating of section bar stretch bending process; The Qianmen is installed on the top panel, upwardly opens, and has aperture on the Qianmen, is used to measure the temperature of section bar; Two side panels and top panel and rear board are connected, and the side panel first half is an opening, and outer rim is with groove near the opening, and sideskid is positioned in this groove, and slide in front and back; Guide rail is fixed in the bottom panel both sides, and top panel, rear board and both sides panel integral body on guide rail move forward and backward, and are convenient to the installation or the replacing of mould back seat and stretch bending mould; The mould back seat is connected with the bottom panel heat-insulation layer through bolt, and the stretch bending mould is positioned on the heating cabinet bottom panel heat-insulation layer, is connected through insulated bolt with the mould back seat, is separated with one deck mould insulating blanket between stretch bending mould and the mould back seat; This Qianmen, top panel, bottom panel, rear board, side panel and sideskid are the rectangle plate, and have slotted eye in the middle of the sideskid, supply to place section bar usefulness, and this sideskid is to opening mechanism, makes things convenient for the placement and the taking-up of section bar; This guide rail is the billot that is provided with groove, and this mould back seat is a square structure, has two fixing holes on it; This stretch bending mould is circular shape; This pottery heat-insulation layer and assistant heating resistance wire are commercial products;
Said hindering heating system comprises electrical power control cabinet, transformer, heating copper conductor and copper conductor bracing frame certainly, and they are connected to each other through cable; From the effect of resistance heating system is from the resistance heating electric current to be provided for section bar; This electrical power control cabinet is between workshop general supply and transformer; Its effect is for hindering heating system, assistant heating resistance wire and part control system certainly stabilized power source to be provided; The electrical power control cabinet input voltage is the 380V commercial power, peak power 16KW; Transformer act as and converts high voltage source into low-voltage high-current power source between electrical power control cabinet and heating copper conductor, supplies section bar to use from the resistance heating, and this transformer is a single-phase transformer, and specified input voltage is 380V, and output voltage is 5～25V; The heating copper conductor is used to transmit section bar from hindering heating current between transformer and clamp, the effective cross section of this heating copper conductor is long-pending to be 1256mm2; The copper conductor bracing frame is divided into three parts, and wherein a part is fixed on the overhang section bar stretch benders, and two parts are and are symmetrically arranged on the stretching one's arms of stretch benders in addition, and the bracing frame of symmetric arrangement is with the rotation of stretching one's arms;
Said electrical control cabinet is positioned at overhang section bar stretch benders the place ahead, and is connected with overhang section bar stretch benders, and effect is in the stretch bending process, the motion of stretching one's arms and the temperature of section bar to be controlled accurately;
Said clamp is a tubular construction, comprises clamp sleeve, clamp abaculus A, clamp abaculus B, clamp abaculus C, heating wires joint and clamp oil cylinder contiguous block, and the clamp sleeve is that the profile of clamp contains member; Be core structure; Clamp abaculus A, clamp abaculus B, clamp abaculus C are positioned at the clamp sleeve inner, are connected with the clamp sleeve through bolt respectively, and the heating wires joint is through being bolted on the clamp abaculus C; And with the heating copper conductor be connected; Clamp oil cylinder contiguous block is positioned at clamp sleeve the inside, with clamp abaculus A, clamp abaculus B, clamp abaculus C embedding mutually, and links to each other with the stretch of stretching oil cylinder; The inwall of this clamp sleeve and clamp central axis are 10 ° of angles, and the heating wires joint bends with plate and forms, and this clamp oil cylinder contiguous block then is a disc-shaped structure; Clamp abaculus C comprises fixedly slide block, detachable slide block and clamp insulating blanket, and the clamp insulating blanket is fixedly between slide block and the detachable slide block, and the three is continuous through insulated bolt; The clamp insulating blanket is all L-shaped with detachable slide block; The clamp insulating blanket is by ceramic material, and detachable slide block is then processed by metal material, and fixedly slide block is the wedge structure that metal material is processed; The back has circular groove, is used for the embedding of clamp oil cylinder contiguous block; Fixedly slide block has cooling-water duct, to realize the cooling of clamp, prevents the operate as normal of temperatures involved system electric elements.
2. the method for using of the curved creep combined shaping fixture system of a section bar hot-drawn, it is characterized in that: these method concrete steps are following:
Step 1: section bar is passed the sideskid interstitial hole, be positioned in the heating cabinet;
Step 2: the section bar two ends are positioned in the grip finger, open the clamp oil cylinder and clamp the section bar two ends, the adjustment clamp position makes section bar and stretch bending mould summit tangent, closes the Qianmen;
Step 3: start from the power supply that hinders heating system and assistant heating resistance wire; Section bar is heated; Measure the temperature of section bar simultaneously in real time through temperature measuring equipment; The output voltage of adjustment transformer makes the heating rate of section bar reach 5～25 ℃/s between 3～25V, reaches preset stretch wrap forming temperature value T until the section bar temperature
1
Step 4: drive section bar applying stretch bending mould through clamp, carry out the stretch bending process, the stretch bending process is divided into prestretching, coating and benefit and draws three phases, at first section bar is imposed certain pretension, makes it in strain rate 1.0 * 10
-2～1.0 * 10
-2s
-1Carry out prestretched in the scope, the prestretching amount is controlled at 0.1～4%; Drive section bar in strain rate 1.0 * 10 through clamp then
-2～1.0 * 10
-2s
-1Carry out the coating process in the scope, until the stretch bending mould of fitting fully, impose a certain amount of benefit at last again and draw, making the final range of strain of section bar is 0.1～8%, and the temperature that the stretch bending process is controlled section bar simultaneously remains on stretch wrap forming temperature value T
1
Step 5: the temperature of section bar W is adjusted to creep temperature value T
2, keep the subsides mould state 5～100Min of section bar, make the section bar internal stress loose, carry out creep process, the temperature of section bar is adjusted to creep temperature value T
2, the subsides mould state 5～100Min of maintenance section bar makes the section bar internal stress loose, carries out creep process;
Step 6: be shaped to finish, clamp is unclamped in the cooling of control section bar, open sideskid to opening mechanism, take out section bar.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103036453A CN102814368A (en) | 2012-08-23 | 2012-08-23 | Compound molding tool system for hot stretch bending and creep deformation of section bar and application method of compound molding tool system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103036453A CN102814368A (en) | 2012-08-23 | 2012-08-23 | Compound molding tool system for hot stretch bending and creep deformation of section bar and application method of compound molding tool system |
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| CN110666040A (en) * | 2019-09-17 | 2020-01-10 | 中国航空制造技术研究院 | Hot stretch bending die and stretch bending forming method of titanium alloy profile |
| CN111644498A (en) * | 2020-06-12 | 2020-09-11 | 中国航空制造技术研究院 | Control method for electrothermal stretch bending process of titanium alloy section and stretch bending forming device |
| CN112474933A (en) * | 2021-01-06 | 2021-03-12 | 长春工业大学 | Three-dimensional hot stretch bending forming device based on multi-degree-of-freedom mold structure |
| CN113510170A (en) * | 2021-05-25 | 2021-10-19 | 北京航空航天大学 | Process regulation and control method for forming curved surface component with complex section by using titanium alloy extruded section |
| CN113560381A (en) * | 2021-07-27 | 2021-10-29 | 北京航空航天大学 | Large-section titanium alloy profile high-temperature creep forming tool and using method thereof |
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| CN102962382A (en) * | 2012-12-21 | 2013-03-13 | 杨世生 | Electric heating rebar straightener |
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| CN103962425A (en) * | 2014-05-13 | 2014-08-06 | 西北工业大学 | Electric heating stretching-bending forming device for airplane titanium alloy sectional materials |
| CN103962425B (en) * | 2014-05-13 | 2016-03-16 | 西北工业大学 | A kind of electric heating stretch wrap forming device for Titanium Alloy Aircraft section bar |
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| CN104561869A (en) * | 2014-12-26 | 2015-04-29 | 中国航空工业集团公司北京航空制造工程研究所 | Titanium alloy profile stretch bending, forming and in-situ heat treating method |
| CN104561869B (en) * | 2014-12-26 | 2016-08-03 | 中国航空工业集团公司北京航空制造工程研究所 | A kind of titanium alloy profile stretch wrap forming situ heat treatment method |
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| CN107695150A (en) * | 2017-09-06 | 2018-02-16 | 西北工业大学 | A kind of resistance electrical heating stretch wrap forming mould and its design method certainly |
| CN110314960A (en) * | 2019-04-11 | 2019-10-11 | 长春工业大学 | A kind of mental section three-dimensional electric heating stretch wrap forming technique and equipment |
| CN109954773A (en) * | 2019-04-30 | 2019-07-02 | 长春工业大学 | A kind of mental section multiple spot Three Dimensional Thermal stretch wrap forming equipment |
| CN110666040A (en) * | 2019-09-17 | 2020-01-10 | 中国航空制造技术研究院 | Hot stretch bending die and stretch bending forming method of titanium alloy profile |
| CN111644498A (en) * | 2020-06-12 | 2020-09-11 | 中国航空制造技术研究院 | Control method for electrothermal stretch bending process of titanium alloy section and stretch bending forming device |
| CN111644498B (en) * | 2020-06-12 | 2021-09-10 | 中国航空制造技术研究院 | Control method for electrothermal stretch bending process of titanium alloy section and stretch bending forming device |
| CN112474933A (en) * | 2021-01-06 | 2021-03-12 | 长春工业大学 | Three-dimensional hot stretch bending forming device based on multi-degree-of-freedom mold structure |
| CN113510170A (en) * | 2021-05-25 | 2021-10-19 | 北京航空航天大学 | Process regulation and control method for forming curved surface component with complex section by using titanium alloy extruded section |
| CN113510170B (en) * | 2021-05-25 | 2022-06-24 | 北京航空航天大学 | Process regulation and control method for forming curved surface component with complex section by using titanium alloy extruded section |
| CN113560381A (en) * | 2021-07-27 | 2021-10-29 | 北京航空航天大学 | Large-section titanium alloy profile high-temperature creep forming tool and using method thereof |
| CN113560381B (en) * | 2021-07-27 | 2022-03-29 | 北京航空航天大学 | Large-section titanium alloy profile high-temperature creep forming tool and using method thereof |
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