Integrated forming tooling for the overall annular frame of the high-speed train driver's cab and its forming method

Abstract

The integral ring-shaped frame integrated forming tooling for the cab of high-speed trains and its forming method belong to the field of manufacturing integral ring-shaped frames for the cabs of rail vehicles. The tooling includes multiple groups of limiting mechanisms, rolling mechanisms and stretch bending jigs. The limiting mechanism includes a connecting seat at the end of the mold base, an L-shaped support arm, a screw pressing mechanism, a pressing base plate, a profiling pressing block and four profiling pressing block connecting bolts; the connecting seat at the end of the mold base includes a connecting seat, a hinge shaft seat and a state locking pin, and the screw pressing mechanism includes a screw rod and a screw rod driving handle vertically fixed to its end. The present invention can effectively solve the defects existing in the traditional bending forming process, such as high profile cross-section, large deformation resistance, and easy inability to completely fit the mold profile surface after stretch bending; the tooling structure is simple, the forming method is efficient, easy to use, with excellent forming quality, can greatly improve the forming accuracy, reduce the difficulty and workload of subsequent dimensional adjustment, thus significantly improving the yield rate of one-time forming, and further saving production costs.

Description

Technical Field

[0001] The present invention belongs to the field of manufacturing the integral ring frame of the cab of rail vehicles, and particularly relates to an integral forming tooling for the integral ring frame of the cab of a high-speed train and a forming method thereof. Background Art

[0002] The arched integral ring frame of the door of the cab of a high-speed train is one of the typical parts with the greatest manufacturing difficulty in the manufacture of the aluminum alloy car body of a high-speed train. This component is bent from aluminum alloy profiles and is a main load-bearing component of the car body. Its shape accuracy directly determines the manufacturing accuracy of the entire car body, and high requirements are imposed on the forming accuracy and product quality.

[0003] Such as Figure 2 and Figure 3 As shown, the existing arched integral ring frame 2 of the cab door is formed by welding two external bent beams N and one roof bent beam M. It needs to be formed separately from multiple profile parts and then welded to each other, with a total length of about 8-9 meters. The manufacturing difficulty of this component lies not only in its complex cross-sectional shape similar to that of a channel steel, but also in that along the elongation direction of the contour line, there are not only upper straight line segments D1 and lower straight line segments E1 that are symmetric on both sides, but also multiple top large arc segments A1, upper arc segments B1, and lower arc segments C1 with varying curvatures. Since the thickness value of the profile wall of the integral ring frame 2 is small and the curvature radius changes complexly, during the welding manufacturing process, the thermal deformation of the material is intense, the deformation coordination is poor, the forming difficulty is high, and it is easy to cause defects such as large springback dimensions, cross-section distortion, and large perpendicularity errors after welding.

[0004] The existing forming method uses a welding process. First, the two external bent beams N and one roof bent beam M are respectively bent and formed, and then positioned and assembled and welded to each other. Using this method, the forming quality of the single parts of the external bent beam and the roof bent beam will affect the overall accuracy of the assembly welding. The external bent beam and the roof bent beam both require separate forming dies, and the overall cost of the dies is high; moreover, there are many assembly welding processes, and it is difficult to control the welding deformation and residual stress.

[0005] On the other hand, such as Figure 1The shown stretch-bending machine device 1 is a relatively well-known stretch-bending forming device for aluminum alloy profiles. At the front end of the basic die 1-1, it is provided with a die front-end grooving 1-2 and a die front-end arc end face 1-3 formed by upper and lower dies. The arc end face 1-3 pre-calculates the springback compensation amount according to the target shape and curvature of the stretch-bent workpiece and the springback index of the workpiece itself, so as to automatically compensate the stress deformation amount after stretch-bending forming to reduce springback. However, the existing stretch-bending forming method based on the stretch-bending machine usually only relies on the design improvement of the curvature and springback amount of the die itself, but cannot perform lateral restraint on the aluminum alloy profile to be stretched from the direction of the die front-end grooving 1-2. Especially when dealing with super-large aluminum alloy profile workpieces with complex cross-sectional shapes, many arc segments and large curvature changes, such as the door arch-shaped integral ring frame of the high-speed train driver's cab, due to the high cross-sectional height and large deformation resistance of the profile, it is prone to defects that it cannot fully fit the die surface after stretch-bending. Therefore, the existing stretch-bending forming method based on the stretch-bending machine usually cannot effectively control the curvature change or springback deformation of the upper arc segment B1 and the lower arc segment C1 of the large arc segment A1 at the top, and often fails to take into account both aspects, thus unable to meet the one-time stretch-bending forming requirements of the integral ring frame 2. After the existing stretch-bending forming, it still needs to go through multiple compensation corrections and adjustment treatments, which greatly increases the labor intensity and production cost, and even leads to the manufacturing cost based on the stretch-bending process being much higher than the old resistance welding manufacturing method, and further makes the manufacturing method based on the stretch-bending forming process unable to be effectively implemented at low cost in the manufacturing field of the integral ring frame of the high-speed train driver's cab. Summary of the Invention

[0006] In order to solve the technical problems that for the existing door arch-shaped integral ring frame of the high-speed train driver's cab, its welding manufacturing process of split forming and welding assembly is restricted by factors such as small wall thickness value of the profile, complex curvature radius change, severe thermal deformation during material welding, poor deformation coordination, etc., resulting in high welding forming difficulty, easy to cause defects such as large springback size, cross-sectional distortion, and large perpendicularity error after welding; while the existing stretch-bending forming method based on the stretch-bending machine cannot perform lateral restraint on the aluminum alloy profile to be stretched from the direction of the die front-end grooving, resulting in its inability to simultaneously control the curvature change amount or springback deformation in one go when dealing with super-large aluminum alloy profile workpieces with complex cross-sectional shapes, many arc segments and large curvature changes, such as the door arch-shaped integral ring frame of the high-speed train driver's cab, and often fails to take into account both aspects, thus unable to meet the low-cost manufacturing requirements of the integral ring frame of the high-speed train driver's cab, the present invention provides an integrated forming tooling and forming method for the integral ring frame of the high-speed train driver's cab.

[0007] The technical solutions adopted by the present invention to solve the technical problems are as follows:

[0008] The tooling for the integrated forming of the overall annular frame of the driver's cab of a high-speed train is characterized in that: the tooling includes a plurality of limiting mechanisms, a rolling mechanism and a drawing and bending jig, the drawing and bending jig includes a jig groove and a jig arc end face opened at the front end of the jig base; the jig groove and the jig arc end face together form a mold concave die; the rolling mechanism is located on the outer sides of the left and right ends of the jig mold concave die; the rolling mechanism includes a rolling mechanism support seat, an XY plane bidirectional driving structure and a punch roller, the punch roller is fixedly connected to the upper end face of the rolling mechanism support seat through the XY plane bidirectional driving structure, the punch roller and the mold concave die are located on the same height plane and correspond to each other; the limiting mechanism includes a jig base end connecting seat, an L-shaped support arm, a screw clamping mechanism, a clamping base plate, a follow-up pressure block and four follow-up pressure block connecting bolts; the jig base end connecting seat includes a connecting seat, a hinge shaft seat and a state locking pin, and the connecting seat is fixedly connected to the jig base in a detachable manner; the L-shaped support arm includes a support arm The horizontal section and the arm suspension section, the horizontal section of the arm is rotatably connected to the hinge shaft seat through a rotating shaft; the lower part of the arm suspension section is provided with an arm screw hole parallel to the horizontal section of the arm; the screw clamping mechanism includes a screw rod and a screw rod driving handle vertically fixed to its end; the other end of the screw rod passes through the arm screw hole and is vertically fixed to the center of the rear end face of the clamping base plate; the rear end face of the profiled pressure block is fixedly connected to the front end face of the clamping base plate through four profiled pressure block connecting bolts; the side wall of the shaft seat of the hinge shaft seat is also A non-working state anti-rotation latch hole and a working state locking latch hole are respectively provided around the rotating axis, and a support arm locking latch hole is also provided at the end of the horizontal section of the support arm. The state locking latch coaxially connects the support arm locking latch hole with the non-working state anti-rotation latch hole or the working state locking latch hole in a detachable manner; the multiple limiting mechanisms are arranged along the tire mold groove at the outer edge of the tire mold base, and the follow-up pressure block of each limiting mechanism can be pressed horizontally on the outside of the notch along the tire mold groove.

[0009] The forming method of the integrated forming tooling of the overall annular frame of the high-speed train driver's cab comprises the following steps:

[0010] Step 1: Clamp the two ends of the aluminum alloy type material of the integral annular frame by the two bending clamps provided by the bending machine, and make the top large arc segment firstly embedded in the top position of the die gate arch of the mold. After that, start the bending machine and drive the two bending clamps to move slowly from the two sides of the top of the die gate arch of the mold to the bottom edge of the gate arch corresponding to the lower straight segment. Under the initial clamping and limiting action of the clamping force of the bending clamp, use the bending jig to pre-stretch the profile so that the profile enters the plastic state.

[0011] Step 2: Further bend the integrally formed ring-shaped aluminum alloy profile after it enters the plastic state by the bending and clamping pliers of the stretch bending machine, and make it close to and wrap around the profile of the arc end face of the matrix die. During this process, in the order from the middle to both sides, use each group of limiting mechanisms arranged at the curvature change connection points of the profile of the stretch bending die to press the top large arc segment, upper arc segment, upper straight segment, lower arc segment, and lower straight segment respectively, so as to ensure that each section of the profile wraps around and closely fits the curved profile of the arc end face of the matrix die;

[0012] Step 3: In the final stage when the integrally formed ring-shaped profile deforms and closes to and wraps around the profile of the arc end face of the matrix die, start the XY-plane two-way drive structures of the two rolling mechanisms respectively to drive the punch rollers to lean against the outside of the corresponding lower straight segment and roll along its outer end face and apply a certain pressure. Use the tread surface of the rollers to press the bulging part of the profile during demolding back against the curved profile of the arc end face of the matrix die, forcing the entire length of the profile to completely fit the profile of the stretch bending die;

[0013] Step 4: After the stretch bending forming process is completed, the XY-plane two-way drive structure can be made to drive the punch rollers to move in the reverse direction and release the pressure on the lower straight segment, and the bending and clamping pliers of the stretch bending machine loosen the two ends of the integrally formed ring; and pull out the status locking pins on each limiting mechanism from their corresponding working status locking pin holes one by one, rotate the horizontal section of the support arm to the vertical state around the hinge axis seat and insert the status locking pins into the non-working status anti-rotation pin holes. After that, the subsequent processes can be entered.

[0014] The beneficial effects of the present invention are as follows: The present invention provides a simple and low-cost integrated forming tooling for the integrally formed ring of the high-speed train driver's cab, an integrated forming device and forming method for stretch bending and rolling with a multi-section auxiliary limiting mechanism, which can effectively solve the defects existing in the traditional bending forming process, such as high profile cross-section, large deformation resistance, and easy occurrence of incomplete fitting with the die profile after stretch bending.

[0015] The integrated forming tooling for the integrally formed ring of the high-speed train driver's cab disclosed in the present invention requires the cross-sectional profile curve of the die cavity of the mold to take the theoretical surface dimension parameters of the top view drawing of the integrally formed ring profile as the input quantity, calculate and solve the springback compensation parameters of the tensile stress deformation through a well-known professional simulation software for stretch bending dies, and perform the actual manufacturing of the die cavity surface of the mold according to the results of the springback compensation parameters, so as to optimize the compensation control of the stress springback during the stretch bending process and significantly weaken the springback deformation amount.

[0016] The connecting seat at the mold base end of the limit mechanism is fixedly connected to the mold base in a detachable manner. The horizontal section of the L-shaped arm has the functions of attitude switching and attitude locking, so that the hanging section of the arm can arrange the lead screw pressing mechanism and the pressing base plate connected thereto horizontally outside the notch of the mold groove along the horizontal direction. Furthermore, the profiling block can be fixed and pressed against the outer side wall of the overall annular frame profile exposed outside the notch of the mold groove, achieving the effect of strengthening the positioning accuracy. The number and layout of the limit mechanisms are determined according to the number and positions of the curvature change connection points on the overall annular frame curved surface arc section including the springback compensation parameter results. This auxiliary limiting method with a multi-segment layout enables the arc section after profile stretch bending to fit more closely to the mold cavity surface, thus maximizing the effective strengthening constraint on the key positions with prominent curvature changes and the most concentrated stress during the profile stretch bending process, enabling precise forming of the arc section with a smaller radius, and then significantly reducing the springback deformation amount. Therefore, it can significantly eliminate the problem of virtual connection between the profile and the mold cavity surface caused by the high profile cross-section, large stiffness, and large deformation resistance, effectively improving the profile accuracy and controlling forming defects such as cross-section distortion.

[0017] The punch rollers of the rolling mechanism are correspondingly arranged on a plane at the same height as the mold cavity. The XY-plane bidirectional drive structure can drive the punch rollers to lean against the outside of the corresponding lower straight section and roll along its outer end face and apply a certain pressure. Using the roller tread surface, the bulged part of the profile during demolding is re-pressed and fitted to the curved surface of the mold arc end face, forcing the entire length of the profile to completely fit the mold surface of the stretch bending tool, thereby improving the forming accuracy of the arc section with a smaller radius and effectively controlling the shape accuracy requirements such as cross-section distortion and profile error, and improving the forming quality.

[0018] The integrated forming tooling for the overall annular frame of the high-speed train driver's cab disclosed by the present invention has the characteristics of simple structure, high efficiency of the forming method, easy use, excellent forming quality, etc., and can significantly improve the forming accuracy, reduce the difficulty and workload of subsequent dimensional adjustment, thereby significantly improving the qualified rate of one-time forming, and then saving production costs and creating economic value. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a general structural schematic diagram of a known stretch bending tool for a mold.

[0020] Figure 2 is a sectional structural schematic diagram of the door arch-shaped overall annular frame of the existing driver's cab and its segments under welding or stretch bending processes respectively.

[0021] Figure 3 is a cross-sectional structural schematic diagram of the door arch-shaped overall annular frame of the existing driver's cab.

[0022] Figure 4It is the top view of the integral ring-shaped frame forming tooling for the driver's cab of the high-speed train of the present invention;

[0023] Figure 5 It is the schematic top view structure of the stretch-bending tool of the present invention;

[0024] Figure 6 It is the schematic sectional view structure of the female die of the mold of the present invention;

[0025] Figure 7 It is the three-dimensional structure schematic diagram of the limit mechanism of the present invention;

[0026] Figure 8 It is Figure 7 the exploded assembly schematic diagram of;

[0027] Figure 9 It is the exploded assembly schematic diagram of the limit mechanism of the present invention from another three-dimensional perspective;

[0028] Figure 10 It is the schematic top view structure of the rolling mechanism of the present invention;

[0029] Figure 11 It is the working principle diagram when the limit mechanism of the present invention presses on the integral ring-shaped frame located in the female die of the mold. Specific embodiments

[0030] The present invention will be further described in detail below with reference to the accompanying drawings.

[0031] Such as Figures 4 to 10As shown in the figure, the integral ring forming tooling for the cab of a high-speed train according to the present invention is characterized in that: the tooling includes a plurality of limiting mechanisms 3, a rolling mechanism 4, and a stretch-bending die 5. The stretch-bending die 5 includes a die groove 5-2 and a die arc end face 5-3 formed at the front end of the die base 5-1; the die groove 5-2 and the die arc end face 5-3 together form a die cavity. The rolling mechanism 4 is located outside the left and right ends of the die cavity of the stretch-bending die 5. The rolling mechanism 4 includes a rolling mechanism support base 4-1, an XY-plane two-way driving structure F, and a punch roller 4-6. The punch roller 4-6 is fixedly connected to the upper end face of the rolling mechanism support base 4-1 through the XY-plane two-way driving structure F. The punch roller 4-6 and the die cavity are located on the same height plane and correspond to each other. The limiting mechanism 3 includes a die base end connection seat 3-1, an L-shaped arm 3-2, a screw pressing mechanism 3-3, a pressing base plate 3-4, a conforming pressing block 3-5, and four conforming pressing block connection bolts 3-6. The die base end connection seat 3-1 includes a connection seat 3-1-1, a hinge seat 3-1-2, and a state locking pin 3-1-3. The connection seat 3-1-1 is fixedly connected to the die base 5-1 in a detachable manner. The L-shaped arm 3-2 includes a horizontal arm section 3-2-1 and a hanging arm section 3-2-2. The horizontal arm section 3-2-1 is rotatably connected to the hinge seat 3-1-2 through a rotating shaft. A screw hole 3-2-2-1 parallel to the horizontal arm section 3-2-1 is provided at the lower part of the hanging arm section 3-2-2. The screw pressing mechanism 3-3 includes a screw rod 3-3-1 and a screw rod driving handle 3-3-2 vertically fixed to its end. The other end of the screw rod 3-3-1 passes through the screw hole 3-2-2-1 and is vertically fixed to the center of the rear end face of the pressing base plate 3-4. The rear end face of the conforming pressing block 3-5 is fixedly connected to the front end face of the pressing base plate 3-4 through four conforming pressing block connection bolts 3-6. Non-working state anti-rotation pin holes 3-1-2-1 and working state locking pin holes 3-1-2-2 surrounding its rotating shaft are respectively provided on the side wall of the hinge seat 3-1-2 of the shaft seat. A locking pin hole 3-2-1-1 is also provided at the end of the horizontal arm section 3-2-1. The state locking pin 3-1-3 coaxially and fixedly connects the locking pin hole 3-2-1-1 with the non-working state anti-rotation pin hole 3-1-2-1 or the working state locking pin hole 3-1-2-2 in a detachable manner. The plurality of limiting mechanisms 3 are all arranged along the die groove 5-2 on the outer edge of the die base 5-1, and the conforming pressing block 3-5 of each limiting mechanism 3 can be pressed horizontally against the outside of the notch of the die groove 5-2.

[0032] The connection seat 3-1-1 can be fixedly connected to the die base 5-1 in a detachable manner through a plurality of bolts; alternatively, the connection seat 3-1-1 itself is a strong magnetic base with a switch and is fixedly connected to the upper end face of the die base 5-1 by strong magnetic adsorption.

[0033] The XY plane bidirectional driving structure F is two groups of hydraulic cylinders or air cylinders or linear guide rails or lead screw mechanisms stacked one above the other and with their telescopic directions perpendicular to each other.

[0034] The tire mold groove 5-2 and the tire mold arc end face 5-3 together form the mold cavity, and the cross-sectional shape contour of the mold cavity is based on the theoretical surface size parameters of the top view drawing of the overall annular frame 2 as input. The rebound compensation parameters of the tensile stress deformation are calculated and solved by the professional simulation software of the well-known stretch-bending mold, and the actual manufacturing of the mold cavity surface is carried out based on the solved rebound compensation parameters.

[0035] The number of the limiting mechanisms 3 is greater than or equal to the number of curvature change connection points on the curved arc segment of the overall annular frame 2 containing the rebound compensation parameter results; for the curved arc segment with a gentle curvature change, a limiting mechanism 3 is arranged at the tangent connection point between every two arc segments; preferably, for the curved arc segment with a gentle curvature change, a limiting mechanism 3 is arranged at the tangent connection point of each odd-numbered arc segment in a manner spaced apart from each other.

[0036] The roller treads of the male rollers 4-6 and the surface profiles of the conforming pressing blocks 3-5 on each limiting mechanism 3 are processed for matching according to the curvature corresponding to the position of the limiting mechanism 3 on the mold concave mold surface.

[0037] Preferably, during the actual production of the annular frame integrated forming tooling of the present invention, the connecting seat 3-1-1 and the tire mold base 5-1 are fixed by bolt connection; the XY plane bidirectional drive structure F uses two sets of hydraulic or handwheel driven screw mechanisms stacked up and down and with telescopic directions perpendicular to each other to improve the durability of the equipment and reduce manufacturing and maintenance costs.

[0038] When the tooling of the present invention is used to form an integral annular frame of a high-speed train driver's cab, the following steps are followed:

[0039] Step 1: Clamp the two ends of the aluminum alloy type material of the integral annular frame 2 by two bending clamps provided with the bending machine, and make the top large arc segment A1 firstly embedded in the top position of the die gate arch of the mold, and then start the bending machine and drive the two bending clamps to move slowly from the two sides of the top of the die gate arch of the mold to the bottom edge of the gate arch corresponding to the lower straight segment E1; under the initial clamping and limiting action of the clamping force of the bending clamp, use the bending jig 5 to pre-stretch the profile so that the profile enters a plastic state;

[0040] Step 2: The integral annular frame 2 aluminum alloy material which has entered the plastic state is further gradually bent by the bending clamp provided by the bending machine, and is attached to and wrapped around the profile of the arc end face 5-3 of the tire mold. Figure 4and Figure 11 As shown in Figure 11 , in the order from the middle to both sides, each group of limiting mechanisms 3 arranged at the curvature change connection points of the profile surfaces of the stretch-bending tool 5 are successively used to tightly press the top large arc segment A1, the upper arc segment B1, the upper straight segment D1, the lower arc segment C1, and the lower straight segment E1 respectively, so as to ensure that each section of the profile is wrapped around and closely adheres to the curved profile surface of the die arc end face 5-3;

[0041] Step 3: In the final stage when the profile of the integral annular frame 2 deforms and adheres to and wraps around the profile surface of the die arc end face 5-3, start the XY-plane two-way driving structures F of the two rolling mechanisms 4 respectively, so that they drive the punch rollers 4-6 to lean against the outside of the corresponding lower straight segment E1 and roll along its outer end face and apply a certain pressure. Use the roller tread to press the bulged part of the profile during demolding back against the curved profile surface of the die arc end face 5-3, forcing the entire length of the profile to completely adhere to the profile surface of the stretch-bending tool 5, thereby improving the forming accuracy of the arc segment with a smaller radius, and effectively controlling the shape accuracy requirements such as cross-section distortion and profile error, and improving the forming quality;

[0042] Step 4: When the stretch-bending forming process is completed, the XY-plane two-way driving structure F can be made to drive the punch roller 4-6 to move in the reverse direction and release the pressure on the lower straight segment E1, and the stretch-bending clamp of the stretch-bending machine loosens the two ends of the integral annular frame 2; and pull out the status locking pins 3-1-3 on each limiting mechanism 3 from their corresponding working status locking pin holes 3-1-2-2 one by one, rotate the horizontal section 3-2-1 of the support arm to the vertical state around the hinge axis seat 3-1-2 and insert the status locking pin 3-1-3 into the non-working state anti-rotation pin hole 3-1-2-1. After that, subsequent processes such as flatness, perpendicularity, profile accuracy adjustment and repair, and cutting and punching can be carried out.

Claims

1. An integrated forming tooling for the overall annular frame of the high-speed train driver's cab, characterized in that: The tooling includes a plurality of limiting mechanisms (3), a rolling mechanism (4), and a stretch-bending die (5). The stretch-bending die (5) includes a die groove (5-2) and a die arc end face (5-3) formed at the front end of a die base (5-1); the die groove (5-2) and the die arc end face (5-3) together form a die cavity; the rolling mechanism (4) is located outside the left and right ends of the die cavity of the stretch-bending die (5); the rolling mechanism (4) includes a rolling mechanism support base (4-1), an XY-plane bidirectional driving structure (F), and a punch roller (4-6). The punch roller (4-6) is fixedly connected to the upper end face of the rolling mechanism support base (4-1) through the XY-plane bidirectional driving structure (F), and the punch roller (4-6) and the die cavity are on the same height plane and correspond to each other; the limiting mechanism (3) includes a die base end connecting seat (3-1), an L-shaped support arm (3-2), a lead screw pressing mechanism (3-3), a pressing base plate (3-4), a profiling block (3-5), and four profiling block connecting bolts (3-6); the die base end connecting seat (3-1) includes a connecting seat (3-1-1), a hinge shaft seat (3-1-2), and a state locking pin (3-1-3). The connecting seat (3-1-1) is fixedly connected to the die base (5-1) in a detachable manner; the L-shaped support arm (3-2) includes a support arm horizontal section (3-2-1) and a support arm overhanging section (3-2-2). The support arm horizontal section (3-2-1) is rotatably connected to the hinge shaft seat (3-1-2) through a rotating shaft; a support arm screw hole (3-2-2-1) parallel to the support arm horizontal section (3-2-1) is provided at the lower part of the support arm overhanging section (3-2-2); the lead screw pressing mechanism (3-3) includes a lead screw (3-3-1) and a lead screw driving handle (3-3-2) vertically fixed to its end; the other end of the lead screw (3-3-1) passes through the support arm screw hole (3-2-2-1) and is vertically fixed to the center of the rear end face of the pressing base plate (3-4); the rear end face of the profiling block (3-5) is fixedly connected to the front end face of the pressing base plate (3-4) through four profiling block connecting bolts (3-6); non-working state anti-rotation pin holes (3-1-2-1) and working state locking pin holes (3-1-2-2) surrounding its rotating shaft are respectively provided on the side wall of the shaft seat of the hinge shaft seat (3-1-2), and a support arm locking pin hole (3-2-1-1) is also provided at the end of the support arm horizontal section (3-2-1). The state locking pin (3-1-3) coaxially and fixedly connects the support arm locking pin hole (3-2-1-1) to the non-working state anti-rotation pin hole (3-1-2-1) or the working state locking pin hole (3-1-2-2) in a detachable manner; the plurality of limiting mechanisms (3) are all arranged along the die groove (5-2) on the outer edge of the die base (5-1), and the profiling block (3-5) of each limiting mechanism (3) can be pressed horizontally against the outside of the notch of the die groove (5-2). In the final stage of the deformation of the profile of the integral annular frame (2) against and around the curved end face (5-3) of the tire mold, the respective XY plane bidirectional drive structures (F) of the two rolling mechanisms (4) are respectively started, so that the punch roller (4-6) is driven to abut against the outside of the lower straight section (E1) of the corresponding integral annular frame and roll along its outer end face and apply a certain pressure, and the raised part of the profile after demoulding is pressed again against the curved surface of the curved end face (5-3) of the tire mold by the roller tread, so as to force the entire length of the profile to completely fit the surface of the stretch bending jig (5).

2. The integral circular frame integrated forming tooling for the cab of a high-speed train as claimed in claim 1, characterized in that: The connecting seat (3-1-1) can be fixedly connected to the tire mold base (5-1) in a detachable manner via a plurality of bolts; or the connecting seat (3-1-1) itself is a strong magnetic base with a switch, and is fixedly connected to the upper end surface of the tire mold base (5-1) by strong magnetic adsorption.

3. The integrated forming tooling for the overall annular frame of the high-speed train driver's cab according to claim 1, characterized in that: The XY plane bidirectional driving structure (F) is two groups of hydraulic cylinders or air cylinders or linear guides or lead screw mechanisms stacked one above the other and with their telescopic directions perpendicular to each other.

4. The integrated forming tooling for the overall annular frame of the high-speed train driver's cab according to claim 1, characterized in that: The tire mold groove (5-2) and the tire mold arc end face (5-3) together form a mold cavity, and the cross-sectional surface contour of the mold cavity is based on the theoretical surface size parameters of the top view drawing of the overall annular frame (2) as input. The rebound compensation parameters of the tensile stress deformation are calculated and solved by professional simulation software of the stretch-bending mold, and the mold cavity surface profile is actually manufactured based on the solved rebound compensation parameters.

5. The integrated forming tooling for the overall annular frame of the high-speed train driver's cab according to claim 4, wherein: The number of the limit mechanisms (3) is greater than or equal to the number of curvature change connection points on the curved arc segment of the overall annular frame (2) containing the rebound compensation parameter; for a curved arc segment with a gentle curvature change, a limit mechanism (3) is arranged at the tangent connection point between every two arc segments.

6. The integrated forming tooling for the overall annular frame of the high-speed train driver's cab as described in claim 5, characterized in that: The roller tread of the male roller (4-6) and the surface profile of the profiled pressing block (3-5) on each limiting mechanism (3) are processed to match the surface according to the curvature corresponding to the position of the limiting mechanism (3) arranged on the mold concave mold surface.

7. A forming method for the integrated forming tooling of the overall circular frame of a high-speed train driver's cab according to any one of the foregoing claims, characterized in that: The integrated forming method of the integral annular frame (2) comprises the following steps: Step 1: Clamp the two ends of the aluminum alloy type material of the integral annular frame (2) by two bending clamps provided with the bending machine, and make the top large arc segment (A1) firstly embedded in the top position of the die gate arch of the mold, then start the bending machine and drive the two bending clamps to move slowly from the two sides of the top of the die gate arch of the mold to the bottom side of the gate arch corresponding to the lower straight segment (E1); under the initial clamping and limiting action of the clamping force of the bending clamp, use the bending jig (5) to pre-stretch the profile so that the profile enters a plastic state; Step 2: Further bend the integrally formed annular frame (2) aluminum alloy profile after it enters the plastic state by the bending clamp of the stretch bending machine, and make it lean against and wrap around the profile surface of the arc end face (5-3) of the mandrel. During this process, in the order from the middle to both sides, successively use each limiting mechanism (3) arranged at the curvature change connection points of the profile surface of the stretch bending tool (5) to press the top large arc segment (A1), the upper arc segment (B1), the upper straight segment (D1), the lower arc segment (C1), and the lower straight segment (E1) respectively, so as to ensure that each section of the profile wraps around and closely fits on the curved profile surface of the arc end face (5-3) of the mandrel; Step 3: In the final stage when the profile of the integrally formed annular frame (2) deforms and leans against and wraps around the profile surface of the arc end face (5-3) of the mandrel, start the XY plane two-way driving structures (F) of the two rolling mechanisms (4) respectively, so that they drive the punch rollers (4-6) to lean against the outside of the corresponding lower straight segment (E1) and roll along its outer end face and apply a certain pressure, and use the roller tread to press the bulged part of the profile during demolding back against the curved profile surface of the arc end face (5-3) of the mandrel, forcing the entire length of the profile to completely fit on the profile surface of the stretch bending tool (5); Step 4: After the stretch bending forming process is completed, the XY plane two-way driving structure (F) can be made to drive the punch roller (4-6) to move in the reverse direction and release the pressure on the lower straight segment (E1), and the bending clamp of the stretch bending machine loosens the two ends of the integrally formed annular frame (2); and pull out the status locking pins (3-1-3) on each limiting mechanism (3) from their corresponding working status locking pin holes (3-1-2-2) one by one, rotate the horizontal section (3-2-1) of the support arm around the hinge seat (3-1-2) to the vertical state and insert the status locking pin (3-1-3) into the non-working state anti-rotation pin hole (3-1-2-1), and then the subsequent processes can be entered.

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