CN116372044A - Integral annular frame forming tool and forming method for cab of high-speed train - Google Patents
Integral annular frame forming tool and forming method for cab of high-speed train Download PDFInfo
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- CN116372044A CN116372044A CN202310409246.3A CN202310409246A CN116372044A CN 116372044 A CN116372044 A CN 116372044A CN 202310409246 A CN202310409246 A CN 202310409246A CN 116372044 A CN116372044 A CN 116372044A
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000005452 bending Methods 0.000 claims abstract description 71
- 230000007246 mechanism Effects 0.000 claims abstract description 71
- 230000000670 limiting effect Effects 0.000 claims abstract description 30
- 238000003825 pressing Methods 0.000 claims abstract description 30
- 238000005096 rolling process Methods 0.000 claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 claims abstract description 19
- 230000008859 change Effects 0.000 claims description 18
- 230000002457 bidirectional effect Effects 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 14
- 229910000838 Al alloy Inorganic materials 0.000 claims description 11
- 239000000725 suspension Substances 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 230000008602 contraction Effects 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- 238000001179 sorption measurement Methods 0.000 claims description 2
- 230000002265 prevention Effects 0.000 claims 2
- 230000007547 defect Effects 0.000 abstract description 4
- 238000003466 welding Methods 0.000 description 14
- 239000012528 membrane Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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- 238000012423 maintenance Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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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
- B21D53/00—Making other particular articles
- B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
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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
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
- B21D7/022—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment over a stationary forming member only
- B21D7/0225—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment over a stationary forming member only using pulling members
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T30/00—Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance
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Abstract
The utility model provides a high-speed train cab integral annular frame integrated forming tool and a forming method thereof, which belong to the field of manufacturing of railway vehicle cab integral annular frames, wherein the tool comprises a plurality of groups of limiting mechanisms, rolling mechanisms and stretch bending clamping molds, and each limiting mechanism comprises a clamping mold base end connecting seat, an L-shaped support arm, a screw rod compressing mechanism, a compressing base plate, a follow-up pressing block and four follow-up pressing block connecting bolts; the connecting seat at the base end of the forming die comprises a connecting seat, a hinge seat and a state locking bolt, and the screw rod pressing mechanism comprises a screw rod and a screw rod driving handle vertically and fixedly connected to the end part of the screw rod. The invention can effectively solve the defects that the section of the section bar is high, the deformation resistance is large, and the section bar can not be completely attached to the mold surface after stretch bending; the tool has the advantages of simple structure, high efficiency, easy use and excellent forming quality, and can greatly improve the forming precision, reduce the subsequent size adjustment difficulty and workload, thereby obviously improving the yield of one-time forming and further saving the production cost.
Description
Technical Field
The invention belongs to the field of manufacturing of integral annular frames of cabs of railway vehicles, and particularly relates to an integral annular frame forming tool and a forming method of a cab of a high-speed train.
Background
The door arch integral annular frame of the cab of the high-speed train is one of typical parts with the greatest manufacturing difficulty of the aluminum alloy train body of the high-speed train, the member is formed by bending aluminum alloy sections and is a main bearing member of the train body, the shape precision of the member directly determines the manufacturing precision of the whole train body, and the requirement on the forming precision and the product quality is high.
As shown in fig. 2 and 3, the door arch-shaped integral ring frame 2 of the existing cab is formed by assembling and welding two outer bent beams N and a roof bent beam M, which are required to be assembled and welded with each other after being formed separately by a plurality of sectional material type elements, and has a total length of about 8-9M. The manufacturing difficulty of the member is that the member approximates to the complex cross-sectional shape of the channel steel, and the member has an upper straight line segment D1 and a lower straight line segment E1 which are symmetrical on two sides along the extension direction of the contour line, and also has a plurality of top large arc line segments A1, upper arc line segments B1 and lower arc line segments C1 with curvature change. Because the thickness value of the integral annular frame 2 profile wall is small and the curvature radius is changed in a complex manner, in the welding manufacturing process, the welding thermal deformation of materials is severe, the deformation coordination is poor, the forming difficulty is high, and the defects of large rebound size, section distortion, large perpendicularity error and the like are easily caused after the welding.
The existing forming method adopts a welding process, and is formed by respectively bending two external bent beams N and a roof bent beam M, positioning and assembling and welding the two external bent beams N and the roof bent beam M. By adopting the method, the single-piece forming quality of the outer curved beam and the roof curved beam can influence the overall accuracy of assembly welding, and the outer curved beam and the roof curved beam both need separate forming dies, so that the overall cost of the dies is high; and the assembly and welding processes are many, so that the welding deformation and the residual stress are difficult to control.
On the other hand, the stretch bender 1 shown in fig. 1 is a well-known stretch bending forming device for aluminum alloy profiles, wherein a front end of a basic tire membrane 1-1 is provided with a tire membrane front end slot 1-2 formed by combining an upper die and a lower die and an arc end face 1-3 at the front end of the tire membrane, and the arc end face 1-3 calculates a rebound compensation amount in advance according to the target shape and curvature of a stretch bent workpiece and the rebound index of the workpiece, so that the stress deformation amount is automatically compensated after stretch bending forming, and the rebound is reduced. However, the stretch bending forming method based on the existing stretch bender generally only depends on the design improvement of the curvature and resilience of the die, but cannot laterally restrict the aluminum alloy section to be stretched from the direction of the slotting 1-2 at the front end of the tire membrane, especially when dealing with the oversized aluminum section workpiece with complicated cross section shape, large number of arc sections and large curvature change, such as the door arch integral annular frame of the cab of the high-speed train, the stretch bending forming method based on the existing stretch bender generally cannot effectively control the curvature change or resilience deformation of the upper arc section B1 and the lower arc section C1 of the top large arc section A1, and often cannot meet the one-time stretch bending forming requirement of the integral annular frame 2 due to the fact that the section is high in section and large in deformation resistance and cannot completely fit the die surface. After the existing stretch bending forming, the labor intensity and the production cost are greatly increased through repeated compensation correction and adjustment treatment, and even the manufacturing cost based on the stretch bending process is far higher than that of the traditional solder resist manufacturing method, so that the manufacturing method based on the stretch bending forming process cannot be effectively implemented in the manufacturing field of the integral annular frame of the cab of the high-speed train at low cost.
Disclosure of Invention
In order to solve the problems of high welding forming difficulty, large rebound size, section distortion, large perpendicularity error and the like caused by the restriction of factors such as small thickness value of a profile wall, complex change of curvature radius, severe welding thermal deformation of materials, poor deformation coordination and the like in the welding manufacturing process of split forming and welding assembly of the door arch integral annular frame of the existing high-speed train cab; the invention provides a high-speed train cab integral annular frame integrated forming tool and a forming method, which are used for solving the technical problems that when an existing stretch bending forming method based on a stretch bending machine cannot laterally restrain an aluminum alloy section to be stretched from the slotting direction of the front end of a tire membrane, such as a door arch integral annular frame of a high-speed train cab is complex in cross section shape, a large number of arc sections and large in curvature change, an oversized aluminum section workpiece cannot be subjected to one-time curvature change quantity control or rebound deformation, and the situation that the curvature change quantity control or rebound deformation cannot be realized frequently occurs is considered, so that the low-cost manufacturing requirement of the high-speed train cab integral annular frame cannot be met.
The technical scheme adopted for solving the technical problems is as follows:
integral annular frame integrated forming tool for cab of high-speed train, and is characterized in that: the fixture comprises a plurality of groups of limiting mechanisms, a rolling mechanism and a stretch bending clamping fixture, wherein the stretch bending clamping fixture comprises a clamping fixture groove and a clamping fixture arc end face, wherein the clamping fixture groove and the clamping fixture arc end face are formed in the front end of a clamping fixture base; the tire mold groove and the arc end face of the tire mold jointly form a mold concave die; the rolling mechanism is positioned at the outer sides of the left end head and the right end head of the female die of the stretch bending mould; the rolling mechanism comprises a rolling mechanism supporting seat, an XY plane bidirectional driving structure and a male die roller, wherein the male die roller is fixedly connected to the upper end surface of the rolling mechanism supporting seat through the XY plane bidirectional driving structure, and the male die roller and the female die are positioned on the same height plane and correspond to each other; the limiting mechanism comprises a die base end connecting seat, an L-shaped support arm, a screw rod pressing mechanism, a pressing base plate, a follow-up pressing block and four follow-up pressing block connecting bolts; the connecting seat at the base end of the tire mold comprises a connecting seat, a hinge seat and a state locking bolt, and the connecting seat is fixedly connected with the base of the tire mold in a detachable manner; the L-shaped support arm comprises a support arm horizontal section and a support arm suspension section, and the support arm horizontal section is rotationally connected with the hinge shaft seat through a rotating shaft; the lower part of the support arm suspension section is provided with a support arm screw hole parallel to the support arm horizontal section; the screw rod compressing mechanism comprises a screw rod and a screw rod driving handle vertically and fixedly connected to the end part of the screw rod compressing mechanism; the other end of the screw rod passes through the screw hole of the support arm and is vertically and fixedly connected to the center of the rear end face of the compression base plate; the rear end face of the follow-up pressing block is fixedly connected with the front end face of the pressing base plate through four follow-up pressing block connecting bolts; the side wall of the shaft seat of the hinge shaft seat is also respectively provided with a non-working state rotation preventing bolt hole and a working state locking bolt hole which surround the rotating shaft of the hinge shaft seat, the tail end of the horizontal section of the support arm is also provided with a support arm locking bolt hole, and the state locking bolt is used for coaxially and fixedly connecting the support arm locking bolt hole with the non-working state rotation preventing bolt hole or the working state locking bolt hole in a detachable manner; the plurality of limiting mechanisms are all arranged at the outer edge of the tire mold base along the tire mold groove, and the follow-up pressing blocks of each limiting mechanism can be tightly pressed outside the notch along the tire mold groove along the horizontal direction.
The forming method based on the integral annular frame integrated forming tool of the cab of the high-speed train comprises the following steps of:
step one: two ends of the aluminum alloy profile of the integral annular frame are clamped by two stretch bending clamps of a stretch bending machine, the top large arc line section is firstly embedded into the top end position of the door arch of the die, and then the stretch bending machine is started and drives the two stretch bending clamps to gradually move slowly from the two side positions of the top end of the door arch of the die to the bottom edge direction of the door arch corresponding to the straight line section at the lower part; under the preliminary clamping limiting action of the clamping force of the stretch bending clamp, the profile is prestretched by utilizing a stretch bending clamping fixture, so that the profile enters a plastic state;
step two: the whole annular frame aluminum alloy profile which enters a plastic state is further gradually bent through a stretch bending clamp of a stretch bending machine, and is abutted against and wrapped on the profile of the arc end face of the tire mold, in the process, each group of limiting mechanisms which are arranged at the curvature change connection points of each profile of the stretch bending mold are sequentially used for respectively compressing a top large arc line segment, an upper straight line segment, a lower arc line segment and a lower straight line segment according to the sequence from the middle to the two sides so as to ensure that each section of the profile is wrapped on and tightly attached to the curve profile of the arc end face of the tire mold;
step three: at the final stage of deformation and leaning of the integral annular frame profile and wrapping of the arc end surface profile of the die, respectively starting the XY plane bidirectional driving structures of the two rolling mechanisms to drive the male die roller to lean against the outside of the corresponding lower straight line section and roll along the outer end surface of the male die roller and apply certain pressure, and utilizing the roller tread to press and cling the demolding raised part of the profile to the curve end surface of the arc end surface of the die again so as to force the whole length of the profile to be fully attached to the profile of the stretch bending die;
step four: step four: after the stretch bending forming process is finished, the XY plane bidirectional driving structure can drive the male die roller to reversely move and release the pressure on the lower straight line section, and the stretch bending clamp of the stretch bending machine releases the two ends of the integral annular frame; and the state locking bolt on each limiting mechanism is pulled out of the corresponding working state locking bolt hole one by one, the horizontal section of the support arm rotates around the hinge shaft seat to be in a vertical state, the state locking bolt is inserted into the non-working state rotation preventing bolt hole, and then the subsequent working procedure can be carried out.
The beneficial effects of the invention are as follows: the invention provides a simple and low-cost integral forming tool for a whole annular frame of a cab of a high-speed train, a multi-section auxiliary limiting mechanism stretch bending and rolling integral forming device and a forming method, which can effectively solve the defects that the section bar has high section and large deformation resistance and can not be completely attached to the molded surface of a die easily after stretch bending in the traditional bending forming process.
The invention discloses an integrated forming tool for an integral annular frame of a cab of a high-speed train, wherein a transverse surface profile curve of a die needs to take a theoretical surface dimension parameter of a top view drawing of an integral annular frame profile as an input quantity, a rebound compensation parameter of tensile stress deformation of the die is calculated and solved through professional simulation software of a known stretch bending die, and actual manufacturing of the die surface profile curve of the die is carried out according to a rebound compensation parameter result, so that the stress rebound in the stretch bending process is optimally controlled, and the rebound deformation is obviously weakened.
The clamping die base end connecting seat of the limiting mechanism is fixedly connected with the clamping die base in a detachable mode, and the support arm horizontal section of the L-shaped support arm has the functions of gesture switching and gesture locking, so that the support arm hanging section can arrange the screw rod pressing mechanism and the pressing base plate connected with the screw rod pressing mechanism outside a notch along a clamping die groove along the horizontal direction, and further the follow-up pressing block can be fixed and pressed on the outer side wall of the integral annular frame profile exposed outside the notch of the clamping die groove, and the positioning precision strengthening effect is achieved. The number and the layout of the limit mechanisms are determined according to the number and the positions of curvature change connection points on the curved surface arc section of the integral annular frame containing the rebound compensation parameter result. The auxiliary limiting mode of the multi-section layout enables the arc sections after the profile is bent to be more tightly attached to the molded surface of the die, so that effective strengthening constraint is carried out on key positions with prominent curvature change and most concentrated stress in the bending process of the profile to the greatest extent, the arc sections with smaller radius are precisely formed, and the rebound deformation is further obviously weakened, therefore, the virtual connection problem of the profile and the molded surface of the die caused by high section, high rigidity and high deformation resistance of the profile can be obviously eliminated, the profile precision is effectively improved, and the forming defects such as section distortion and the like are controlled.
The male die roller of the rolling mechanism is correspondingly arranged on a plane with the same height as the female die of the die, the XY plane bidirectional driving structure can drive the male die roller to lean against the outside of the corresponding lower straight line section and roll along the outer side end face of the male die roller and apply certain pressure, the roller tread is utilized to compress and attach the section of the section demoulding bulge to the curve profile of the arc end face of the die again, the whole through length of the section is forced to be completely attached to the profile of the stretch bending die, and therefore the forming precision of the arc section with smaller radius is improved, the shape precision requirements such as section distortion, profile tolerance and the like are effectively controlled, and the forming quality is improved.
The integral forming tool for the integral annular frame of the cab of the high-speed train has the characteristics of simple structure, high forming method efficiency, easiness in use, excellent forming quality and the like, and can greatly improve forming precision, reduce subsequent size adjustment difficulty and workload, obviously improve the yield of one-time forming, further save production cost and create economic value.
Drawings
FIG. 1 is a general structural schematic diagram of a prior art stretch bender mold;
FIG. 2 is a schematic view of a prior art cab door arch shaped integral ring frame and its sectional structure under a welding or stretch bending process, respectively;
FIG. 3 is a schematic cross-sectional view of a door arch shaped unitary annular frame of a prior art cab;
FIG. 4 is a top view of the integrated forming tool for the integral annular frame of the cab of the high-speed train;
FIG. 5 is a schematic top view of the stretch bending mold of the present invention;
FIG. 6 is a schematic cross-sectional view of a female die of the present invention;
FIG. 7 is a schematic perspective view of a spacing mechanism of the present invention;
FIG. 8 is a schematic view of the explosive assembly of FIG. 7;
FIG. 9 is a schematic view of an explosive assembly of the spacing mechanism of the present invention in another perspective;
FIG. 10 is a schematic top view of the rolling mechanism of the present invention;
fig. 11 is a schematic diagram of the operation of the spacing mechanism of the present invention in pressing an integral annular frame within a die.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
As shown in fig. 4 to 10, the integral annular frame forming tool for the cab of the high-speed train is characterized in that: the fixture comprises a plurality of groups of limiting mechanisms 3, rolling mechanisms 4 and stretch bending clamping dies 5, wherein the stretch bending clamping dies 5 comprise a clamping die groove 5-2 and a clamping die arc end surface 5-3 which are arranged at the front end of a clamping die base 5-1; the tire mold groove 5-2 and the tire mold arc end surface 5-3 form a mold concave die together; the rolling mechanism 4 is positioned at the outer sides of the left end and the right end of the female die of the stretch bending mould 5; the rolling mechanism 4 comprises a rolling mechanism supporting seat 4-1, an XY plane bidirectional driving structure F and a male die roller 4-6, wherein the male die roller 4-6 is fixedly connected to the upper end surface of the rolling mechanism supporting seat 4-1 through the XY plane bidirectional driving structure F, and the male die roller 4-6 and the female die are positioned on the same height plane and correspond to each other; the limiting mechanism 3 comprises a die base end connecting seat 3-1, an L-shaped supporting arm 3-2, a screw rod compressing mechanism 3-3, a compressing base plate 3-4, a follow-up pressing block 3-5 and four follow-up pressing block connecting bolts 3-6; the tire mold base end connecting seat 3-1 comprises a connecting seat 3-1-1, a hinge shaft seat 3-1-2 and a state locking bolt 3-1-3, wherein the connecting seat 3-1-1 is fixedly connected with the tire mold base 5-1 in a detachable manner; the L-shaped support arm 3-2 comprises a support arm horizontal section 3-2-1 and a support arm suspension section 3-2-2, and the support arm horizontal section 3-2-1 is rotationally connected with the hinge seat 3-1-2 through a rotating shaft; the lower part of the support arm suspension section 3-2-2 is provided with a support arm screw hole 3-2-2-1 parallel to the support arm horizontal section 3-2-1; the screw rod compressing mechanism 3-3 comprises a screw rod 3-3-1 and a screw rod driving handle 3-3-2 vertically fixedly connected to the end part of the screw rod; the other end of the screw rod 3-3-1 passes through a screw hole 3-2-2-1 of the support arm and is vertically and fixedly connected to the center of the rear end face of the compression base plate 3-4; the rear end face of the follow-up pressing block 3-5 is fixedly connected with the front end face of the pressing base plate 3-4 through four follow-up pressing block connecting bolts 3-6; the side wall of the shaft seat of the hinge shaft seat 3-1-2 is also respectively provided with a non-working state rotation preventing bolt hole 3-1-2-1 and a working state locking bolt hole 3-1-2-2 which surround the rotating shaft of the hinge shaft seat, the tail end of the horizontal section 3-2-1 of the support arm is also provided with a support arm locking bolt hole 3-2-1-1, and the state locking bolt 3-1-3 coaxially and fixedly connects the support arm locking bolt hole 3-2-1-1 with the non-working state rotation preventing bolt hole 3-1-2-1 or the working state locking bolt hole 3-1-2-2 in a detachable manner; the plurality of limiting mechanisms 3 are all arranged at the outer edge of the tire mold base 5-1 along the tire mold groove 5-2, and the following pressing blocks 3-5 of each limiting mechanism 3 can be pressed outside the notch along the tire mold groove 5-2 along the horizontal direction.
The connecting seat 3-1-1 can be fixedly connected with the tire mold base 5-1 in a detachable manner through a plurality of bolts; or the connecting seat 3-1-1 is a strong magnetic base with a switch and is fixedly connected with the upper end face of the moulding bed base 5-1 in a strong magnetic adsorption mode.
The XY plane bidirectional driving structure F is composed of two groups of hydraulic or cylinder cylinders or linear guide rails or screw mechanisms which are stacked up and down and mutually perpendicular in expansion and contraction directions.
The tire mold groove 5-2 and the tire mold arc end surface 5-3 jointly form a mold concave die, the profile outline of the cross section of the mold concave die takes the theoretical curve surface size parameter of the top view drawing of the profile of the integral annular frame 2 as an input quantity, the rebound compensation parameter of the tensile stress deformation of the mold concave die is calculated and solved through professional simulation software of a known stretch bending mold, and the actual manufacturing of the mold concave die surface type curved surface is carried out according to the optimized rebound compensation parameter result.
The number of the limit mechanisms 3 is larger than or equal to the number of the solved curvature change connection points on the curved arc section of the integral annular frame 2 containing the rebound compensation parameter result; for curved arc sections with gentle curvature change, a limiting mechanism 3 is correspondingly arranged at the tangent connection point of each two arc sections; for curved arc sections with gentle curvature change, a limiting mechanism 3 is correspondingly arranged at the tangential connection point positions of the arc sections with odd numbers of the curved arc sections in a mutually spaced mode.
The roller tread of the male die roller 4-6 and the surface type curved surface of each limit mechanism 3 along with the pressing block 3-5 are processed by matching the surface type corresponding to the curvature of the position of the limit mechanism 3 arranged on the curved surface of the female die of the die.
Preferably, when the annular frame integrated forming tool is actually manufactured, the connecting seat 3-1-1 and the tire mold base 5-1 are fixed in a bolt connection mode; the XY plane bidirectional driving structure F selects two groups of hydraulic or hand wheel driven screw mechanisms which are mutually overlapped up and down and have mutually perpendicular telescopic directions, so as to improve the durability of the equipment and reduce the manufacturing and maintenance cost.
When the tool disclosed by the invention is specifically applied to integrally forming the integral annular frame of the cab of the high-speed train, the tool is carried out according to the following steps:
step one: two ends of the aluminum alloy profile of the integral annular frame 2 are clamped by two stretch bending clamps of a stretch bending machine, a top large arc section A1 is firstly embedded into the top end position of a die door arch, and then the stretch bending machine is started and drives the two stretch bending clamps to gradually move slowly from two side positions of the die door arch top end to the door arch bottom edge direction corresponding to the lower straight line section E1; under the preliminary clamping limiting action of the clamping force of the stretch bending clamp, the stretch bending clamping fixture 5 is utilized to prestretch the profile so that the profile enters a plastic state;
step two: the whole annular frame 2 aluminum alloy type material which enters a plastic state is further gradually bent through a stretch bending clamp of a stretch bending machine, and is abutted against and wrapped on the molded surface of the arc end face 5-3 of the tire mold, in the process, as shown in fig. 4 and 11, each group of limiting mechanisms 3 which are arranged at the curvature change connection points of each molded surface of the stretch bending tire mold 5 are sequentially used for respectively compressing a top large arc segment A1, an upper arc segment B1, an upper straight line segment D1, a lower arc segment C1 and a lower straight line segment E1 in order from the middle to the two sides, so that each section of the section is wrapped on and tightly attached to the curved molded surface of the arc end face 5-3 of the tire mold;
step three: at the final stage of deforming and attaching the integral annular frame 2 profile and wrapping the arc end face 5-3 profile of the tire mold, respectively starting the XY plane bidirectional driving structures F of the two rolling mechanisms 4 to drive the male mold rollers 4-6 to attach to the outside of the corresponding lower straight line section E1 and roll along the outer end face of the male mold rollers and apply certain pressure, and utilizing the roller tread to compress and attach the section of the profile demolding bulge to the curve profile of the arc end face 5-3 of the tire mold again, so that the whole length of the profile is forced to be completely attached to the profile of the stretch bending tire mold 5, thereby improving the forming precision of the arc section with smaller radius, effectively controlling the shape precision requirements such as section distortion, profile error and the like, and improving the forming quality;
step four: after the stretch bending forming process is finished, the XY plane bidirectional driving structure F can drive the male die roller 4-6 to reversely move and release the pressure on the lower straight line section E1, and the stretch bending clamp of the stretch bending machine releases the two ends of the integral annular frame 2; and the state locking bolts 3-1-3 on each limiting mechanism 3 are pulled out of the corresponding working state locking bolt holes 3-1-2-2 one by one, the horizontal section 3-2-1 of the support arm is rotated to a vertical state around the hinge seat 3-1-2, the state locking bolts 3-1-3 are inserted into the non-working state anti-rotation bolt holes 3-1-2-1, and then the subsequent procedures of planeness, perpendicularity, profile precision adjustment, cutting and perforating mechanical addition and the like can be carried out.
Claims (7)
1. Integral annular frame integrated forming tool for cab of high-speed train, and is characterized in that: the fixture comprises a plurality of groups of limiting mechanisms (3), a rolling mechanism (4) and a stretch bending mould (5), wherein the stretch bending mould (5) comprises a mould groove (5-2) and a mould arc end surface (5-3) which are arranged at the front end of a mould base (5-1); the tire mold groove (5-2) and the arc end surface (5-3) of the tire mold form a mold concave die together; the rolling mechanism (4) is positioned at the outer sides of the left end and the right end of the female die of the stretch bending mould (5); the rolling mechanism (4) comprises a rolling mechanism supporting seat (4-1), an XY plane bidirectional driving structure (F) and a male die roller (4-6), wherein the male die roller (4-6) is fixedly connected to the upper end surface of the rolling mechanism supporting seat (4-1) through the XY plane bidirectional driving structure (F), and the male die roller (4-6) and the female die of the die are positioned on the same height plane and correspond to each other; the limiting mechanism (3) comprises a die base end connecting seat (3-1), an L-shaped supporting arm (3-2), a screw rod compressing mechanism (3-3), a compressing base plate (3-4), a follow-up pressing block (3-5) and four follow-up pressing block connecting bolts (3-6); the connecting seat (3-1) at the base end of the tire mold comprises a connecting seat (3-1-1), a hinge shaft seat (3-1-2) and a state locking bolt (3-1-3), and the connecting seat (3-1-1) is fixedly connected with the base (5-1) of the tire mold in a detachable manner; the L-shaped support arm (3-2) comprises a support arm horizontal section (3-2-1) and a support arm suspension section (3-2-2), and the support arm horizontal section (3-2-1) is rotationally connected with the hinge shaft seat (3-1-2) through a rotating shaft; the lower part of the support arm suspension section (3-2-2) is provided with a support arm screw hole (3-2-2-1) parallel to the support arm horizontal section (3-2-1); the screw rod compressing mechanism (3-3) comprises a screw rod (3-3-1) and a screw rod driving handle (3-3-2) vertically fixedly connected to the end part of the screw rod; the other end of the screw rod (3-3-1) passes through a screw hole (3-2-2-1) of the support arm and is vertically and fixedly connected to the center of the rear end face of the compression base plate (3-4); the rear end face of the follow-up pressing block (3-5) is fixedly connected with the front end face of the pressing base plate (3-4) through four follow-up pressing block connecting bolts (3-6); the side wall of the shaft seat of the hinge shaft seat (3-1-2) is also respectively provided with a non-working state rotation prevention bolt hole (3-1-2-1) and a working state locking bolt hole (3-1-2-2) which surround the rotating shaft of the hinge shaft seat, the tail end of the horizontal section (3-2-1) of the support arm is also provided with the support arm locking bolt hole (3-2-1-1), and the state locking bolt (3-1-3) coaxially and fixedly connects the support arm locking bolt hole (3-2-1-1) with the non-working state rotation prevention bolt hole (3-1-2-1) or the working state locking bolt hole (3-1-2-2) in a detachable mode; the limiting mechanisms (3) are arranged at the outer edge of the tire mold base (5-1) along the tire mold grooves (5-2), and the following pressing blocks (3-5) of each limiting mechanism (3) can be pressed outside the notch along the tire mold grooves (5-2) along the horizontal direction.
2. The high-speed train cab integral annular frame integrated forming tool of claim 1, comprising the following steps: the connecting seat (3-1-1) can be fixedly connected with the tire mold base (5-1) in a detachable manner through a plurality of bolts; or the connecting seat (3-1-1) is a strong magnetic base with a switch and is fixedly connected with the upper end surface of the moulding bed base (5-1) in a strong magnetic adsorption mode.
3. The high-speed train cab integral annular frame integrated forming tool as claimed in claim 1, wherein: the XY plane bidirectional driving structure (F) is composed of two groups of hydraulic or cylinder air cylinders or linear guide rails or screw mechanisms which are mutually overlapped up and down and mutually perpendicular in expansion and contraction directions.
4. The high-speed train cab integral annular frame integrated forming tool as claimed in claim 1, wherein: the die groove (5-2) and the arc end face (5-3) of the die jointly form a die, the profile of the cross section of the die takes the theoretical curve dimension parameter of the top view drawing of the profile of the integral annular frame (2) as input quantity, the rebound compensation parameter of the tensile stress deformation of the die is calculated and solved through professional simulation software of a known stretch bending die, and the actual manufacturing of the die surface type curved surface of the die is carried out according to the optimized rebound compensation parameter result.
5. The high-speed train cab integral annular frame integrated forming tool as set forth in claim 4, wherein: the number of the limit mechanisms (3) is larger than or equal to the number of curvature change connection points on the curved arc section of the integral annular frame (2) containing the rebound compensation parameter result solved by the claim 4; for curved arc sections with gentle curvature change, a limiting mechanism (3) is correspondingly arranged at the tangent connection point of each two arc sections; for curved surface arc sections with gentle curvature change, a limiting mechanism (3) is correspondingly arranged at the tangential connection point positions of each odd arc section in a mode of mutual interval.
6. The high-speed train cab integral annular frame integrated forming tool as set forth in claim 5, wherein: the roller tread of the male die roller (4-6) and the surface-type curved surface of each limit mechanism (3) along with the pressing block (3-5) are processed by matching the surface corresponding to the curvature of the position of the limit mechanism (3) on the curved surface of the female die of the die.
7. The forming method of the integral annular frame integrated forming tool for the cab of the high-speed train based on any one of the preceding claims, which is characterized by comprising the following steps: the integral forming method of the integral annular frame (2) comprises the following steps:
step one: two ends of the aluminum alloy profile of the integral annular frame (2) are clamped by two stretch bending clamps of a stretch bender, a top large arc section (A1) is firstly embedded into the top end position of a die door arch, and then the stretch bender is started and drives the two stretch bending clamps to gradually move slowly from the two side positions of the die door arch top end to the door arch bottom edge direction corresponding to the lower straight section (E1); under the preliminary clamping limiting action of the clamping force of the stretch bending clamp, the profile is pre-stretched by utilizing a stretch bending clamping fixture (5), so that the profile enters a plastic state;
step two: the whole annular frame (2) aluminum alloy section after entering a plastic state is further gradually bent through a stretch bending clamp of a stretch bending machine, and is clung to and wrapped on the profile of the arc end face (5-3) of the tire mold, in the process, each group of limiting mechanisms (3) which are distributed at the curvature change connection points of each profile of the stretch bending tire mold (5) are sequentially used for respectively compressing a top large arc section (A1), an upper arc section (B1), an upper straight line section (D1), a lower arc section (C1) and a lower straight line section (E1) according to the sequence from the middle to the two sides so as to ensure that each section of the section is wrapped on and tightly clung to the curve profile of the arc end face (5-3) of the tire mold;
step three: at the final stage of deforming and attaching the profile of the integral annular frame (2) and wrapping the profile of the arc end surface (5-3) of the tire mold, respectively starting the XY plane bidirectional driving structures (F) of the two rolling mechanisms (4) to drive the male mold rollers (4-6) to attach to the outside of the corresponding lower straight line section (E1) and roll along the outer end surface of the male mold rollers and apply certain pressure, and compacting and attaching the demolding raised part of the profile on the curve profile of the arc end surface (5-3) of the tire mold again by utilizing the roller tread to force the whole length of the profile to be completely attached to the profile of the stretch bending tire mold (5);
step four: step four: after the stretch bending forming process is finished, the XY plane bidirectional driving structure (F) can drive the male die roller (4-6) to reversely move and release the pressure of the male die roller on the lower straight line section (E1), and the stretch bending clamp of the stretch bending machine loosens the two ends of the integral annular frame (2); and the state locking bolt (3-1-3) on each limiting mechanism (3) is pulled out of the corresponding working state locking bolt hole (3-1-2-2) one by one, the horizontal section (3-2-1) of the support arm is rotated to a vertical state around the hinge shaft seat (3-1-2) and the state locking bolt (3-1-3) is inserted into the non-working state anti-rotation bolt hole (3-1-2-1), and then the subsequent working procedure can be carried out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310409246.3A CN116372044A (en) | 2023-04-17 | 2023-04-17 | Integral annular frame forming tool and forming method for cab of high-speed train |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310409246.3A CN116372044A (en) | 2023-04-17 | 2023-04-17 | Integral annular frame forming tool and forming method for cab of high-speed train |
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| Publication Number | Publication Date |
|---|---|
| CN116372044A true CN116372044A (en) | 2023-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310409246.3A Pending CN116372044A (en) | 2023-04-17 | 2023-04-17 | Integral annular frame forming tool and forming method for cab of high-speed train |
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| CN (1) | CN116372044A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117619957A (en) * | 2024-01-26 | 2024-03-01 | 江苏中创铝业科技有限公司 | Integrated aluminum profile stretch bending machine and stretch bending method thereof |
-
2023
- 2023-04-17 CN CN202310409246.3A patent/CN116372044A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117619957A (en) * | 2024-01-26 | 2024-03-01 | 江苏中创铝业科技有限公司 | Integrated aluminum profile stretch bending machine and stretch bending method thereof |
| CN117619957B (en) * | 2024-01-26 | 2024-04-09 | 江苏中创铝业科技有限公司 | Integrated aluminum profile stretch bending machine and stretch bending method thereof |
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