Automobile top cover forming process and flanging side shaping die

Abstract

The invention provides an automobile top cover forming process. The automobile top cover forming process comprises a first procedure; a second step in which circumferential trimming, front and rear side shaping, and rear side corner positive shaping are performed when the sunroof-free top cover is processed, and circumferential trimming, front and rear side shaping, rear side corner positive shaping, and sunroof trimming are performed when the sunroof top cover is processed; when the skylight is trimmed, part of plate allowance is reserved on the left side and the right side in the skylight to serve as anti-dragging materials; in the third procedure, left and right side shaping is carried out when the skylight-free top cover is machined, and left and right side shaping and anti-dragging forward flanging are carried out when the skylight top cover is machined; when the top cover with the skylight is produced, in the second working procedure, part of plate allowance is reserved on the left side and the right side in the skylight in advance to serve as anti-dragging materials, so that during side shaping of the third working procedure, forward flanging is conducted on the anti-dragging materials to counteract the pulling force of side shaping of the two sides of the top cover on the plates on the left side and the right side outside the skylight, and the forming quality of the top cover with the skylight is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile roof processing, and in particular relates to an automobile roof forming process and a flanging side integral mold. Background Art

[0002] The car roof is a common outer covering in the automotive industry. The quality of its molding directly affects the appearance quality of the whole vehicle. At present, the car roof is mainly divided into sunroof roof 01 (such as Figure 1 As shown) and without skylight roof 02 (as shown Figure 2 As shown), the difference between the two lies in whether there is a skylight or not. In order to reduce costs, the top cover with a skylight and the top cover without a skylight are usually produced by co-molding. The process of co-molding the top cover mainly includes drawing, trimming, shaping and other work contents. Specifically, the first process is the drawing process, which uses a drawing die to process the flat blank into a drawn part; the second process is trimming + shaping. In this process, when processing a top cover without a skylight, it is necessary to perform circumferential trimming, front side shaping, rear side shaping and rear corner shaping. When processing a top cover with a skylight, additional skylight trimming is required. The trimming mechanism at the skylight can be switched using a switching mechanism to achieve co-molding processing; the third process includes side shaping. In this process, it is necessary to perform side shaping on the left and right sides of the top cover; after the third process is completed, punching, trimming, shaping, etc. can be performed to complete the final processing of the top cover.

[0003] In the prior art, when performing the sunroof trimming operation in the second process, the waste material at the sunroof position will be partially or completely removed, resulting in a narrow width of the sheet material on the left and right sides of the sunroof. When performing the side shaping in the subsequent third process, the sheet material cannot be pressed firmly, resulting in the problem of excessive pulling of the sheet material on both sides of the sunroof, affecting the molding quality of the sunroof top cover 01, and thus affecting the subsequent assembly quality of the whole vehicle. Summary of the invention

[0004] In view of the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide a car roof forming process and a flanging side finishing mold, which reserves some sheet material surplus on the left and right sides inside the sunroof as anti-pull material when trimming the sunroof, so that during the subsequent side shaping of the top cover, the anti-pull material can be flanging operated to offset the pulling force generated by the side shaping of the top cover on the left and right sides of the sheet material outside the sunroof, thereby ensuring that the forming quality of the top cover with a sunroof is consistent with the forming quality of the top cover without a sunroof produced by a common mold, thereby improving the subsequent assembly quality of the whole vehicle.

[0005] To achieve the above-mentioned and other related purposes, the present invention provides a process for forming a car roof, comprising:

[0006] In the first process, the flat blank is processed into a first process part by a drawing die;

[0007] The second process is to process the first process part through a trimming and shaping mold to obtain the second process part; in this process, when processing without a skylight top cover, circumferential trimming, front and rear side shaping and rear corner shaping are performed, and when processing with a skylight top cover, circumferential trimming, front and rear side shaping, rear corner shaping and skylight trimming are performed; when performing skylight trimming, a portion of sheet material surplus is reserved on the left and right sides of the skylight as anti-pull material;

[0008] The third process is to process the second process part through the flanging side shaping mold to obtain the third process part; in this process, left and right side shaping is performed when processing without a skylight top cover, and left and right side shaping and positive flanging of the anti-pull material are performed when processing with a skylight top cover;

[0009] The third process part is processed into the automobile roof.

[0010] When producing a sunroof top cover, the present application first reserves a portion of excess sheet material on the left and right sides inside the sunroof as anti-pull material in the sunroof trimming operation in the second process, and in the third process, the reserved anti-pull material is positively flanged to offset the pulling force of the side shaping of the top cover on the left and right sides of the sheet material outside the sunroof, thereby ensuring that the molding quality of the top cover with a sunroof and the molding quality of the top cover without a sunroof produced by a common mold can be kept as consistent as possible, thereby improving the subsequent assembly quality of the whole vehicle.

[0011] Preferably, the width of the anti-pull material is 15 mm to 20 mm to ensure that sufficient offsetting force can be provided during subsequent top cover side shaping.

[0012] Preferably, in the third step, when processing the skylight top cover, the positive flange of the anti-pull material is shaped earlier than the left and right sides of the top cover to ensure the molding quality of the skylight top cover.

[0013] The present invention also provides a flanging side integral mold for processing the above-mentioned second process part; the flanging side integral mold comprises a lower mold base and an upper mold base; the lower mold base is provided with a fixed punch and a pulley sliding horizontally in the front-back direction, and the top of the fixed punch is provided with a flanging groove corresponding to the position of the skylight; two inclined wedges are symmetrically arranged on the left and right sides of the fixed punch, and a first guide plate assembly is provided between the pulley and each inclined wedge to convert the horizontal movement of the pulley into the inclined movement of the inclined wedge; the lower side of the upper mold base is provided with an upper pressing core, which is connected to the inclined wedge A side straightening knife that cooperates with a wedge, a positive flanging assembly that cooperates with the flanging groove, and a driving insert knife that drives the pulley to move backward, the side straightening knife is movably provided with a side pressure core that cooperates with the inclined wedge; the positive flanging assembly is movably inserted into the upper pressure core and is connected to the upper mold base in a liftable manner; when the positive flanging assembly is lifted, it has a processing station without a skylight and a processing station with a skylight, and the processing station without a skylight is higher than the processing station with a skylight; by switching the position of the positive flanging assembly, the co-molding production of the top cover with and without a skylight is achieved.

[0014] Preferably, the front flanging assembly contacts the top cover on the fixed punch before the side trimming knife, so that during side trimming, the anti-pull material of the flanging can stabilize the workpiece and prevent the skylight from being tensilely deformed during side trimming.

[0015] Preferably, when the positive flanging assembly contacts the top cover, the minimum spacing between the side trimming knife and the top cover is 3 mm to 5 mm, so as to ensure that the anti-pull material of the flanging can provide sufficient offsetting force when the top cover is side-shaped.

[0016] Preferably, the positive flanging assembly is connected to the upper mold base in a liftable manner through a nitrogen spring; the upper mold base is provided with a horizontal sliding frame and a horizontal driving member that drives the horizontal sliding frame to switch between an avoidance station and a stop station in a horizontal direction; when the horizontal sliding frame is located at the avoidance station, the positive flanging assembly can switch freely between a processing station without a skylight and a processing station with a skylight; when the positive flanging assembly is located at the processing station with a skylight and the horizontal sliding frame is located at the stop station, the horizontal sliding frame limits the upward movement of the positive flanging assembly; the present application switches the position of the horizontal sliding frame to enable the positive flanging assembly to switch between the processing station without a skylight and the processing station with a skylight, thereby realizing the co-molding production of a top cover with a skylight and a top cover without a skylight.

[0017] Preferably, the horizontal sliding frame includes a horizontal sliding plate and a first positioning block formed at the bottom of the horizontal sliding plate; the positive flanging assembly includes a positive flanging seat and a positive flanging knife located at the bottom of the positive flanging seat, and the top of the positive flanging seat is formed with a second positioning block that cooperates with the first positioning block; the horizontal driving member drives the horizontal sliding frame to move so that the first positioning block is aligned or misaligned with the second positioning block; in this way, when the first positioning block is aligned with the second positioning block, the first positioning block can limit the upward movement stroke of the positive flanging assembly, so that the bottom of the positive flanging assembly is always located below the upper pressure core, thereby completing the flanging of the anti-pull material at the skylight; when the first positioning block is misaligned with the second positioning block, since the first positioning block cannot abut against the second positioning block on the positive flanging assembly, the positive flanging assembly can be smoothly retracted into the upper pressure core, so that it cannot contact the workpiece, thereby realizing the processing of a skylight-free top cover.

[0018] Preferably, the horizontal driving member is a cylinder or a linear motor, which can be determined by the user according to needs.

[0019] Preferably, a return spring is provided on the lower die seat to return the pulley to its original position, so as to ensure that the pulley can be smoothly returned to its original position after the upper die seat moves upward.

[0020] As described above, the automobile roof forming process and the flange side integral mold of the present invention have the following beneficial effects:

[0021] (1) The present invention can produce roof covers with skylights and roof covers without skylights by common mold, thereby effectively reducing the development and manufacturing costs of molds.

[0022] (2) When producing a top cover with a sunroof, the present invention reserves a portion of excess sheet material on the left and right sides of the sunroof as anti-pull material during the sunroof trimming operation in the second process, so that in the subsequent third process, the reserved anti-pull material is subjected to a positive flanging operation to offset the pulling force generated by the side trimming of the top cover on the left and right sides of the sunroof, thereby ensuring that the molding quality of the top cover with a sunroof is as consistent as possible with the molding quality of the top cover without a sunroof produced by a common mold, thereby improving the subsequent assembly quality of the whole vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a top view of the roof with skylight.

[0024] Figure 2 for Figure 1 AA isometric section view.

[0025] Figure 3 This is a top view of the roof without skylight.

[0026] Figure 4 for Figure 3 BB section view.

[0027] Figure 5 The second process part having a skylight top cover is obtained by adopting the automobile top cover forming process of the present invention.

[0028] Figure 6 It is an exploded view of the upper and lower molds of the flanging side integral mold in the present invention.

[0029] Figure 7 This is a three-dimensional view of the lower mold in the flanging side mold.

[0030] Figure 8 This is a three-dimensional image of the lower die after removing the fixed punch.

[0031] Fig. 9 It is a three-dimensional diagram of the coordination between the pulley and the angled wedge.

[0032] Fig.10 for Fig. 9 Front view of.

[0033] Fig.11 This is a bottom view of the upper die in the flanging side mold.

[0034] Fig.12 for Fig.11 CC section view.

[0035] Fig.13 It is a three-dimensional diagram of the cooperation between the positive flanging assembly and the horizontal sliding frame.

[0036] Fig.14This is a diagram of the positive flanging component in the state of the skylight processing station.

[0037] Fig.15 This is a state diagram of the positive flange component in the processing station without skylight.

[0038] Description of Reference Numerals

[0039] There is a skylight top cover 01, there is no skylight top cover 02, the second process part 03, the anti-pull material 031, the lower die base 1, the upper die base 2, the fixed punch 3, the flanging groove 3a, the pulley 4, the inclined wedge 5, the upper pressure core 6, the side straightening knife 71, the side pressure core 72, the positive flanging assembly 8, the positive flanging seat 81, the second positioning block 811, the positive flanging knife 82, the horizontal sliding frame 91, the horizontal sliding plate 911, the first positioning block 912, and the horizontal driving member 92. DETAILED DESCRIPTION

[0040] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0041] See also Figures 1 to 15 . It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0042] like Figures 1 to 4 As shown, the difference between the top cover with skylight 01 and the top cover without skylight 02 lies in whether there is a skylight or not. Therefore, a switching mechanism at the skylight can be used to realize co-molding production of the top cover with skylight 01 and the top cover without skylight 02, so as to achieve the purpose of reducing mold development costs.

[0043] At present, the common mold production process of the top cover mainly includes drawing, trimming, shaping and other work contents. Specifically, the first process is the drawing process, which uses a drawing die to process the flat blank into a drawn part; the second process is trimming + shaping, in which the processing of the top cover without a sunroof 02 requires circumferential trimming, front side shaping, rear side shaping and rear corner shaping, and the processing of the top cover with a sunroof 01 requires additional sunroof trimming, and the trimming mechanism at the sunroof can be switched using a switching mechanism to achieve common mold processing; the third process includes side shaping, in which the left and right sides of the top cover need to be shaped; after the third process is completed, punching, trimming, shaping, etc. can be performed to complete the final processing of the top cover. However, in actual operation, it was found that when the sunroof top cover 01 was undergoing the sunroof trimming operation in the second process, the waste material at the sunroof position would be partially or completely cut off; when the size of the sunroof was large (that is, the length of the sunroof exceeded half of the length of the part, and the width of the sunroof exceeded half of the width of the part), the width of the left and right side sheets of the sunroof after the sunroof trimming operation was narrow, resulting in the situation that the material could not be pressed down during the subsequent side shaping of the top cover, resulting in the problem of excessive pulling of the left and right side sheets of the sunroof, affecting the molding quality of the sunroof top cover 01, thereby resulting in a large difference in molding quality between the sunroof top cover 01 and the non-sunroof top cover 02 produced by the same mold, affecting the subsequent vehicle assembly quality.

[0044] Based on this, the present application provides a new automobile roof molding process to improve the consistency of molding quality of a sunroof roof 01 and a sunroof-free roof 02 during co-molding production. The automobile roof molding process includes:

[0045] In the first process, the flat blank is processed into a first process part by a drawing die; since the drawing die is a prior art, it will not be described in detail;

[0046] The second process is to process the first process part through a trimming and shaping mold to obtain the second process part 03; in this process, when processing the top cover 02 without a skylight, the circumference trimming, front and rear side shaping and rear corner shaping are performed, and when processing the top cover 01 with a skylight, the circumference trimming, front and rear side shaping, rear corner shaping and skylight trimming are performed; when performing skylight trimming, a part of the sheet material surplus is reserved on the left and right sides of the skylight as the anti-pull material 031 (such as Figure 5 shown);

[0047] In the second process, the trimming and shaping mold has a skylight trimming mechanism that can be raised and lowered. When processing without a skylight top cover 02, the skylight trimming mechanism rises and does not participate in the work; when processing with a skylight top cover, the skylight trimming mechanism descends to switch to the working state; when the skylight size is large and cannot be completely cut out of the mold at one time, the skylight trimming of the second process needs to adopt a staggered cutting method to facilitate material discharge. In this embodiment, if Figure 1 and Figure 5As shown, the waste material in the skylight is partially cut away to form three small skylight openings, and the three small skylight openings are distributed in a triangular shape as a whole. Among them, when the two small skylight openings in the same width direction are formed, part of the sheet material surplus must be reserved on the left side of the left small skylight opening as anti-pull material 031, and part of the sheet material surplus must be reserved on the right side of the right small skylight opening as anti-pull material 031.

[0048] In this embodiment, the width of the anti-pull material is 15mm~20mm, so as to ensure that when the second process part 03 with the sunroof top cover is subsequently side-trimmed, it can provide sufficient anti-pull force to offset the pulling force of the sheet material at the sunroof caused by the side shaping on both sides, thereby improving the forming quality of the sunroof top cover 01, so that the forming quality of the sunroof top cover 01 and the non-sunroof top cover 02 can be kept as consistent as possible, thereby ensuring the subsequent vehicle assembly quality.

[0049] The third process is to process the second process part through the flanging side shaping mold to obtain the third process part; in this process, when processing without the sunroof top cover 02, the left and right sides are shaped, and when processing with the sunroof top cover 01, the left and right sides are shaped and the anti-pull material 031 is flanging;

[0050] In the third step, the flange side mold has a positive flange assembly 8 that can be raised and lowered (see Fig.12 ); when processing the top cover 02 without a skylight, the positive flanging assembly 8 rises and does not participate in the work; when processing the top cover 01 with a skylight, the positive flanging assembly 8 descends to switch to the working state; in order to ensure the molding quality of the top cover 01 with a skylight, when processing the top cover 01 with a skylight, the positive flanging of the anti-pull material 031 is earlier than the left and right side shaping of the top cover, so as to utilize the positive flanging action of the anti-pull material 031 to increase the stability of the second process part 03, and avoid the problem that the sheet material on both sides of the skylight is excessively pulled and causes deformation of the skylight when it is shaped on the side of the top cover, thereby improving the molding quality of the top cover with a skylight 01; in the present embodiment, the positive flanging action of the anti-pull material 031 starts (that is, the positive flanging starts to touch the material) 3mm to 5mm before the side shaping of both sides of the top cover begins (that is, before the side shaping touches the material).

[0051] The third process part is processed into a car roof, and the operations involved include but are not limited to punching, trimming, and shaping; when processing the sunroof roof 01, all the waste in the sunroof needs to be removed. In order to realize common mold production, the waste removal mechanism at the sunroof has a lifting function to switch between the working position and the non-working position.

[0052] The present application also provides a flanging side integral mold for processing the above-mentioned second process part; Figures 6 to 12 As shown, the flanging side mold includes a lower mold base 1 and an upper mold base 2; wherein,

[0053] The lower die base 1 is provided with a fixed punch 3 for supporting materials and a pulley 4 that slides horizontally in the front-to-back direction; the top of the fixed punch 3 is provided with a flanging groove 3a corresponding to the position of the skylight, and two inclined wedges 5 are symmetrically provided on the left and right sides of the fixed punch 3; a first guide plate assembly is provided between the pulley 4 and each inclined wedge 5 to convert the horizontal movement of the pulley 4 into the inclined movement of the inclined wedge 5; the first guide plate assembly is two wedge blocks that cooperate with each other, and the two wedge blocks are respectively installed on the pulley 4 and the inclined wedge 5, so that when the wedge block of the pulley 4 moves backward, it will push the wedge block on the inclined wedge 5 to move upward, thereby converting the horizontal backward movement of the pulley 4 into the inclined upward movement of the inclined wedge 5; when the pulley 4 drives the wedge block on it to move forward, the inclined wedge 5 will move downward under the action of gravity, thereby converting the horizontal forward movement of the pulley 4 into the inclined downward movement of the inclined wedge 5.

[0054] The lower side of the upper die base 2 is provided with an upper pressure core 6 cooperating with the fixed punch 3, a side trimming knife 7 cooperating with the inclined wedge 5, a positive flanging assembly 8 cooperating with the flanging groove 3a and a driving insert knife 11 for driving the pulley 4 to move backward; the upper pressure core 6 is connected to the upper die base 2 in a manner that can be raised and lowered by a nitrogen spring; a side pressure core 71 cooperating with the inclined wedge 5 is movably provided on the side trimming knife 7, and the side pressure core 71 is connected to the side trimming knife 7 through a nitrogen spring; the positive flanging assembly 8 is movably inserted into the movable hole of the upper pressure core 6 and is connected to the upper die base 2 in a manner that can be raised and lowered; when the positive flanging assembly 8 is raised and lowered, it has a processing station without a skylight and a processing station with a skylight, and the processing station without a skylight is higher than the processing station with a skylight.

[0055] During processing, the second process part must be placed on the fixed punch 3 first; then, the upper die seat 2 moves downward, so that the upper pressure core 6 moves downward and presses the second process part onto the fixed punch 3; the upper die seat 2 continues to move downward, so that the driving insert 11 contacts the pulley 4 to drive the pulley 4 to move horizontally backward. During this process, the first guide plate assembly converts the horizontal backward movement of the pulley 4 into an inclined upward movement of the inclined wedge 5, so as to use the inclined wedge 5 to provide auxiliary support for the second process part on the fixed punch 3; the upper die seat 2 continues to move downward, so that the side pressure core 71 moves downward and presses the second process part onto the corresponding inclined wedge 5; when it is necessary to process the skylight top cover 01, the positive flanging assembly 8 is moved down to the skylight processing process Position, at this time, the upper mold base 2 moves downward, which will cause the positive flanging assembly 8 to move downward to complete the positive flanging of the anti-pull material 031. During this process, the side straightening knife 7 contacts the second process part 03 to complete the side shaping. Since the positive flanging action of the anti-pull material 031 can offset the pulling force generated by the left and right side straightening of the top cover on the left and right side sheets outside the skylight, it can effectively avoid the deformation of the skylight under the action of the pulling forces on the left and right sides, thereby ensuring the molding quality of the skylight top cover 01; when it is necessary to process the skylight-free top cover 02, the positive flanging assembly 8 moves up to the skylight-free workstation. At this time, the upper mold base 2 moves downward, which will cause the side straightening knife 7 to move downward to complete the side shaping. During this process, the positive flanging assembly 8 does not participate in the work.

[0056] Furthermore, when processing the skylight top cover 01, the front flanging assembly 8 contacts the top cover on the fixed punch 3 before the side trimming knife 7; specifically, when the front flanging assembly 8 contacts the top cover, the minimum spacing between the side trimming knife 7 and the top cover is 3 mm to 5 mm.

[0057] Since the deformation of the material during the positive flanging process is mainly bending deformation, it is not easy to produce uneven tensile deformation. Therefore, when the anti-pull material 031 is flanging, it is not easy to cause material pulling. After the positive flanging action is carried out, the top cover side shaping begins. The folded anti-pull material 031 can be used to offset the pulling force on the left and right sides of the skylight during the top cover side shaping, thereby avoiding the skylight from being pulled and deformed, affecting the molding quality of the skylight top cover 01.

[0058] In the above-mentioned flanging side integral mold, the structure that enables the positive flanging component 8 to switch between the processing station without skylight and the processing station with skylight includes but is not limited to the following structural forms.

[0059] Structural form 1:

[0060] The positive flanging assembly 8 is directly connected to the upper die base 2 through existing lifting drive mechanisms such as linear motors and ordinary cylinders; the height position of the positive flanging assembly 8 is adjusted by the lifting drive mechanism so that the positive flanging assembly 8 can be switched between a processing station without a skylight and a processing station with a skylight.

[0061] Structural form 2:

[0062] like Fig.12 and Fig.13 As shown, the positive flanging assembly 8 is connected to the upper die base 2 in a liftable manner through a nitrogen spring, and the upper die base 2 is provided with a horizontal sliding frame 91 and a horizontal driving member 92 for driving the horizontal sliding frame 91 to switch between the avoidance station and the stop station in the horizontal direction, and the horizontal driving member 92 is a linear motor or a cylinder or a hydraulic cylinder or other linear driving mechanism; when the horizontal sliding frame 91 is located at the avoidance station, the positive flanging assembly 8 can switch between the processing station without a skylight and the processing station with a skylight; when the positive flanging assembly 8 is located at the processing station with a skylight and the horizontal sliding frame 91 is located at the stop station, the horizontal sliding frame 91 limits the upward movement of the positive flanging assembly 8 to ensure the stability of the flanging of the anti-pull material 031.

[0063] In the initial state, the nitrogen spring at the top of the positive flanging assembly 8 is in an extended state; when processing the skylight top cover 01, the horizontal driving member 92 is required to first switch the horizontal sliding frame 91 to the stop position; then the upper die base 2 is moved downward, and the upper pressure core 6 first contacts the second process part 03 and rises, and then the positive flanging assembly 8 contacts the second process part 03 and rises, until the positive flanging assembly 8 is in the skylight processing position and abuts against the horizontal sliding frame 91; the upper die base 2 continues to move downward, and since the horizontal sliding frame 91 limits the downward movement of the positive flanging assembly 8, the positive flanging assembly 8 will move downward relative to the upper pressure core 6 to make the anti-pull material 031 positively flanging.

[0064] When processing the top cover 02 without a skylight, it is necessary to first use the horizontal driving member 92 to switch the horizontal sliding frame 91 to the stop position; then move the upper mold base 2 downward, and the upper pressure core 6 first contacts the second process part 03 and rises, and then the positive flanging component 8 contacts the second process part 03 and rises. Since the horizontal sliding frame 91 will not limit the upward movement of the positive flanging component 8, the positive flanging component 8 can smoothly pass the skylight processing station and move upward to the non-skylight processing station, avoiding the positive flanging component 8 from participating in the work; during this process, the positive flanging component 8 will not extend out of the movable hole of the upper pressure core 6.

[0065] Taking into account factors such as control difficulty, installation and maintenance difficulty, and pressing stability, this embodiment preferably adopts structural form 2 to switch the position of the positive flanging component 8.

[0066] like Figures 13 to 15 As shown, the horizontal sliding frame 91 includes a horizontal sliding plate 911 and a first positioning block 912 formed at the bottom of the horizontal sliding plate 911; the positive flanging assembly 8 includes a positive flanging seat 81 and a positive flanging knife 82 located at the bottom of the positive flanging seat 81, and the positive flanging knife 82 is integrally formed with the positive flanging seat 81 or is detachably connected by bolts or the like; a second positioning block 811 is formed on the top of the positive flanging seat 81 to cooperate with the first positioning block 912; the horizontal driving member 92 drives the horizontal sliding frame 91 to move so that the first positioning block 912 is aligned or misaligned with the second positioning block 811; through the alignment and misalignment of the first positioning block 912 and the second positioning block 811, the switching processing of the skylight top cover 01 and the non-skylight top cover 02 is realized.

[0067] Furthermore, in order to facilitate the resetting of the pulley 4 to start the processing of the next second process part 03, a resetting spring is provided on the lower die base 1 to move the pulley 4 forward and reset; of course, a return hook member can also be added to the upper die base 2 to utilize the upward movement of the return hook member to drive the pulley 4 to move forward and reset. The specific structural form of the return hook member is not limited, as long as the return hook member can drive the pulley 4 to move forward and reset when following the upward movement of the upper die base 2.

[0068] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A process for forming a car roof, characterized in that: include In the first process, the flat blank is processed into a first process part by a drawing die; The second step is to process the first step part through a trimming and shaping mold to obtain a second step part (03); in this step, when processing a top cover without a skylight (02), circumferential trimming, front and rear side shaping, and rear corner shaping are performed, and when processing a top cover with a skylight (01), circumferential trimming, front and rear side shaping, rear corner shaping, and skylight trimming are performed; when trimming the skylight, a portion of sheet material surplus is reserved on both sides of the skylight as an anti-pull material (031); The third step is to process the second step part (03) through a flanging side shaping mold to obtain a third step part; in this step, left and right side shaping is performed when processing a part without a skylight top cover (02), and left and right side shaping and positive flanging of the anti-pull material (031) are performed when processing a part with a skylight top cover (01); The third process part is processed into the automobile roof.

2. The automobile roof forming process according to claim 1, characterized in that: The width of the anti-pull material (031) is 15 mm to 20 mm.

3. A process for forming a car roof according to claim 1 or 2, characterized in that: In the third step, when processing the skylight top cover (01), the positive flange of the anti-pull material (031) is shaped earlier than the left and right sides of the top cover.

4. A flanging side integral mold, characterized in that: Used for processing the second process part (03) as described in claim 1 or 2; the flanging side integral mold comprises a lower mold base (1) and an upper mold base (2); the lower mold base (1) is provided with a fixed punch (3) and a pulley (4) sliding horizontally in the front-back direction, and the top of the fixed punch (3) is provided with a flanging groove (3a) corresponding to the position of the skylight; two inclined wedges (5) are symmetrically arranged on the left and right sides of the fixed punch (3), and a first guide plate assembly is provided between the pulley (4) and each inclined wedge (5) to convert the horizontal movement of the pulley (4) into the inclined movement of the inclined wedge (5); the upper mold base ( 2) is provided with an upper material pressing core (6), a side trimming knife (7) cooperating with an inclined wedge (5), a positive flanging assembly (8) cooperating with a flanging groove (3a), and a driving inserting knife (11) for driving the pulley (4) to move backward; the side trimming knife (7) is movably provided with a side material pressing core (71) cooperating with the inclined wedge (5); the positive flanging assembly (8) is movably inserted into the upper material pressing core (6) and is connected to the upper die seat (2) in a manner that it can be raised and lowered; when the positive flanging assembly (8) is raised and lowered, it has a processing station without a skylight and a processing station with a skylight, and the processing station without a skylight is higher than the processing station with a skylight.

5. A flanging side integral mold according to claim 4, characterized in that: When processing a skylight top cover, the positive flanging component (8) contacts the top cover on the fixed punch (3) before the side trimming knife (7).

6. A flanging side integral mold according to claim 5, characterized in that: When the positive flanging component (8) contacts the top cover, the minimum spacing between the side trimming knife (7) and the top cover is 3 mm to 5 mm.

7. The flanging side integral mold according to claim 4, characterized in that: The positive flanging assembly (8) is connected to the upper die base (2) via a nitrogen spring so as to be liftable; the upper die base (2) is provided with a horizontal sliding frame (91) and a horizontal driving member (92) for driving the horizontal sliding frame (91) to switch between an avoidance position and a stop position in a horizontal direction; when the horizontal sliding frame (91) is located at the avoidance position, the positive flanging assembly (8) can switch freely between a processing position without a skylight and a processing position with a skylight; when the positive flanging assembly (8) is located at a processing position with a skylight and the horizontal sliding frame (91) is located at the stop position, the horizontal sliding frame (91) limits the upward movement of the positive flanging assembly (8).

8. The flanging side integral mold according to claim 7, characterized in that: The horizontal sliding frame (91) comprises a horizontal sliding plate (911) and a first positioning block (912) formed at the bottom of the horizontal sliding plate (911); the positive flanging assembly (8) comprises a positive flanging seat (81) and a positive flanging knife (82) located at the bottom of the positive flanging seat (81); the top of the positive flanging seat (81) is formed with a second positioning block (811) that cooperates with the first positioning block (912); the horizontal driving member (92) drives the horizontal sliding frame (91) to move so that the first positioning block (912) is aligned or misaligned with the second positioning block (811).

9. The flanging side integral mold according to claim 4, characterized in that: The horizontal driving member (92) is a cylinder or a linear motor.

10. The flanging side integral mold according to claim 4, characterized in that: The lower die base (1) is provided with a return spring for causing the pulley (4) to move forward and return to its original position.

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