Forming die and forming process for side wall rear cover water channel flanging

Abstract

The application discloses a forming die and a forming process for a side wall rear cover water channel flanging, and belongs to the technical field of automobile part machining. The lower punch is provided with a left-right displacement reference inclined wedge below the lower punch, and the left upper portion of the reference inclined wedge is provided with an angular portion formed by a top surface and a bottom surface. The application simplifies the forming process of the flanging plate C and significantly improves the forming quality of the flanging plate C.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of automobile part processing, and particularly relates to a forming die and forming process for a side wall rear cover water channel flanging. BACKGROUND

[0002] The water channel of the back door of the SUV vehicle is located on the left and right outer sides of the left and right door frame of the back door, and is combined with the rear side wall plate A Figures 1A-1D The water channel is composed of the door frame edge plate extending from the sheet metal part of the left and right door frame to the outside of the vehicle body in the vehicle width direction and the built-in flange plate C at the rear plate edge of the middle section plate A1 of the rear side wall plate A. The upper section of the rear side wall plate A is the rear side wall top plate A2, and the lower section is the rear wing plate A3. The middle section plate body between the rear side wall top plate A2 and the rear wing plate A3 is also provided with an outer decorative panel to form a floating top body shape or an angular window type outer decorative shape arranged in the middle section plate area between the rear side wall top plate A2 and the rear wing plate A3.

[0003] For the sake of brevity, it is uniformly stated that the built-in flange plate C is arranged at the rear plate edge of the middle section plate A1 of the rear side wall plate A. Figures 3A-3D The scheme shown is a scheme for forming the flange plate C in the prior art, that is, the forming process of the built-in flange plate C at the rear plate edge of the middle section plate A1 of the rear side wall plate A in the prior art. The forming process of the flange plate C at the rear plate edge of the middle section plate A1 of the rear side wall plate A mainly includes drawing, trimming, flanging, side flanging and the like. The first stamping formed plate includes the middle section plate A1 and the flange plate C, Figure 3A The state of the plate after the drawing process, the angle θ between the drawn flange plate C and the target position C0 in the final forming is 140°, and the state after trimming is shown in FIG. Figure 3B At this time, the angle θ between the flange plate C and the target position C0 in the final forming is still 140°. Since the angle θ between the flange plate C and the target position C0 is too large, it cannot be formed to the target position C0 by one-time flanging.

[0004] Therefore, it is necessary to fold and flip to an intermediate position as shown in FIG. Figure 3C The angle θ2 between the intermediate position and the target position C0 is 60°, that is, the angle θ1 of 80° is first folded and flipped, so that two flanging processes need to be implemented in the prior art to reach the target state of the product, the mold cost is high, one more machine tool is needed for the stamping production line, and the production cost is also high. Moreover, the flanged surface is prone to wrinkling, and positioning needs to be performed twice in the two flanging processes. The front and rear positioning is not only complex and difficult, but also affects the forming quality of the flange plate C and damages the forming quality of the middle section plate A1, the rear side wall top plate A2 and the rear wing plate A3 which have been formed. SUMMARY

[0005] The primary object of the present application is to provide a forming die for the flange turning of the rear cover gutter of the side wall, which improves the turning forming quality of the flange plate C.

[0006] In order to achieve the above object, the technical scheme is as follows: a forming die for the flange turning of the rear cover gutter of the side wall, an upper concave die is arranged on an upper die seat, and a lower convex die is arranged on a lower die seat; in the closed die state, the upper concave die is pressed on the outer plate surface of the side wall rear cover plate which has been formed, and the lower convex die is supported on the inner plate surface of the side wall rear cover plate which has been formed; a reference wedge which can move left and right is arranged below the lower convex die; the reference wedge has an angular part formed by a top surface and a bottom surface on the left side of the reference wedge; the included angle formed by the top surface and the bottom surface is the same as the forming design angle θ of the middle plate A1 and the flange plate C of the side wall rear cover plate; the reference wedge moves left to a connection position where the top surface is in line with the lower left type surface of the lower convex die, or the reference wedge moves right to an avoiding position where the top surface is arranged above and below the lower left type surface of the lower convex die; the lower die seat on the left side of the reference wedge has a flange forming die which can move left and right; the flange forming die has a flange forming surface which is parallel to the bottom surface; when the flange forming die moves right and the reference wedge moves left, the flange forming surface presses against the outer plate surface of the flange plate C, and the inner plate surface of the flange plate C is attached to the bottom surface; in this state, the left lower type surface edge of the upper concave die is pressed on the junction edge between the flange plate C and the middle plate A1 of the side wall rear cover plate.

[0007] The beneficial effects of the above technical scheme are as follows: the formed part on the side wall rear cover plate A is used as a positioning part to constrain and position, which ensures the forming quality of the flange plate C and also ensures the forming quality of the middle plate A1, the rear side wall top plate A2 and the rear fender plate A3 which have been formed; the top surface and the left lower type surface edge reliably clamp the middle plate A1 of the side wall rear cover plate in the up-down direction; the gap formed by the top surface and the left lower type surface edge corresponds to the junction edge between the flange plate C and the middle plate A1 of the side wall rear cover plate; when the flange forming die turns the flange plate C, the middle plate A1 of the flange plate C which is adjacent to the flange forming die remains smooth and does not deform, which ensures the forming quality.

[0008] Another object of the present application is to provide a process method for improving the forming efficiency of the flange turning of the rear cover gutter of the side wall.

[0009] In order to achieve the above object, the technical scheme is as follows: a forming process for the flange turning of the rear cover gutter of the side wall, which comprises the following steps:

[0010] S1, providing a side wall rear cover plate A to be formed, the flange plate C of the side wall rear cover plate A to be formed is in a reserved angle α=60° between an initial position and a target position C0, and the plate edge waste of the flange plate C has been removed;

[0011] S2, the middle section plate A1 of the side wall rear cover plate A is placed on the lower convex die in a flat state, the inner side surface of the middle section plate A1 is attached to the top of the lower convex die, the flange plate C and the edge part of the middle section plate A1 adjacent to the flange plate C are suspended outside the left edge of the lower convex die, the flange plate C is in a vertical posture and is located between the flange forming die and the clamping die, and the surface of the flange plate C is parallel to the flange vertical surface on the flange forming die and the clamping vertical surface on the clamping die;

[0012] S3, the upper die seat drives the upper die right insert, the upper concave die and the upper die left insert to move downward, when the upper die right insert is in contact with the inclined surface on the reference wedge insert, the reference wedge is displaced to the left to the connection position where the top surface is in line with the lower left position surface of the lower convex die;

[0013] S4, the upper die seat continues to drive the upper die right insert, the upper concave die and the upper die left insert to move downward, so that the upper concave die is pressed on the outer plate surface of the side wall rear cover plate A in the closed die state, and the lower convex die is supported on the inner plate surface of the side wall rear cover plate A which has been formed;

[0014] S5, the upper die seat continues to move downward, when the upper die left insert is in contact with the inclined surface on the left side of the forming wedge slide seat, the forming wedge slide seat is displaced to the right, so that the flange vertical surface and the clamping vertical surface clamp the flange plate C, and drive the flange plate C to be folded from the initial position to the target position, until the flange forming surface presses the outer plate surface of the flange plate C, and the inner plate surface of the flange plate C is attached to the bottom surface;

[0015] S6, the upper die seat moves upward, the forming wedge slide seat and the reference wedge are reset by the forming wedge slide seat reset spring and the reference wedge reset spring respectively, and when the forming wedge slide seat is in the reset position, the projection of the flange vertical surface on the horizontal plane is located on the left side of the flange plate C; the upper concave die moves upward to separate from the side wall rear cover plate A and picks up the side wall rear cover plate A.

[0016] The beneficial effects of the above technical scheme are: by controlling the flange plate C to be in the initial position and the target position C0 with a reserved angle α=60° during the drawing process, only one flanging is needed for the subsequent flanging surface, which shortens the forming process and reduces the flanging die, thereby reducing the production cost; meanwhile, the use of the flanging die can improve the forming quality of the flange plate C. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figures 1A-1D It is a structure schematic view of the right rear side wall plate of an automobile;

[0018] Figure 2 It is a sectional structure schematic view of the middle section plate at the flange plate;

[0019] Figures 3A-3D It is a traditional process scheme of the side wall rear cover flow channel flanging forming;

[0020] Figures 4A-4C The process scheme of the side wall rear cover water channel flanging forming of the present application;

[0021] Figure 5 The structure schematic diagram of the mold of the present application; Figure 5A The partial enlarged view of the reference inclined wedge and the flanging forming die;

[0022] Figure 6 The structure schematic diagram of the mold after putting in the plate material of the present application; Figure 6A The partial enlarged view of the reference inclined wedge and the flanging forming die;

[0023] Figure 7 The movement schematic diagram of the reference inclined wedge to the closing position of the present application;

[0024] Figure 8 The schematic diagram of the clamping state of the base surface of the plate material of the present application;

[0025] Figure 9 The schematic diagram of the clamping state of the flanging surface of the present application;

[0026] Figure 10 The flanging working state schematic diagram of the present application;

[0027] Figure 11 The flanging return state schematic diagram of the present application; DETAILED DESCRIPTION

[0028] Example 1

[0029] Reference Figures 3A-11A forming die for a side wall rear cover water channel flange, an upper concave die 50 is arranged on an upper die seat 10, a lower convex die 40 is arranged on a lower die seat 20, in a closed die state, the upper concave die 50 is pressed on the outer side of the side wall rear cover plate which has been formed, the lower convex die 40 is supported on the inner side of the side wall rear cover plate which has been formed, a reference wedge 30 which can move left and right is arranged below the lower convex die 40, the left upper part of the reference wedge 30 has an angular part 31 formed by a top surface 311 and a bottom surface 312, the included angle formed by the top surface 311 and the bottom surface 312 is the same as the forming design angle θ0 of the middle section plate A1 and the flange plate C of the side wall rear cover plate, the reference wedge 30 moves to the left to a connection position where the top surface 311 is in line with the lower left type surface of the lower convex die 40 or the reference wedge 30 moves to the right to an avoidance position where the top surface 311 is arranged at a distance above and below the lower left type surface of the lower convex die 40; the lower die seat 20 on the left side of the reference wedge 30 has a flange forming die 73 which can move left and right, the flange forming die 73 has a flange forming surface 731, the flange forming surface 731 is parallel to the bottom surface 312, the flange forming die 73 moves to the right, the reference wedge 30 moves to the left to the position where the flange forming surface 731 presses against the outer side of the flange plate C, the inner side of the flange plate C is attached to the bottom surface 312, in this state, the lower left type surface edge 51 of the upper concave die 50 is pressed on the junction edge of the flange plate C and the middle section plate A1 of the side wall rear cover plate.

[0030] Referring to Figures 4A-4C , the flange plate C is controlled to be at the α=60° position between the initial position and the target position C0 during the drawing process, then the side wall rear cover plate A is trimmed, corresponding to Figures 5-11 , the side wall rear cover plate A is placed on the forming die in a flat state, at this time, the observer observes the side wall rear cover plate A, the flange plate C is on the left side, it can also be understood that at this time, the rear side wall top plate A2 is relatively far away from the observer, the rear wing panel A3 is close to the position where the observer is located, thus defining the left and right orientation relationship involved in the present application.

[0031] Referring to Figure 8 , in the closed die state, the upper concave die 50 is pressed on the outer side of the side wall rear cover plate A which has been formed, the lower convex die 40 is supported on the inner side of the side wall rear cover plate A which has been formed, in this way, the formed part on the side wall rear cover plate A is constrained and positioned as a positioning part, which not only protects the integrity of the formed part on the side wall rear cover plate A, but also realizes the shape and position tolerance requirement between the to-be-formed part and the formed part of the side wall rear cover plate A; the reference wedge 30 is arranged below the lower convex die 40, which is to ensure that the reference wedge 30 is displaced to the right to be at the avoidance position with the to-be-formed part of the side wall rear cover plate A, i.e. the flange plate C, to ensure that the side wall rear cover plate A is placed on the lower convex die 40 and that the formed part on the side wall rear cover plate A can be accurately positioned and constrained by the lower convex die 40 and the upper concave die 50 when the die is closed, as shown in Figure 5A , 6AAs shown, the reference inclined wedge 30 will not interfere with the positioning and constraint of the formed part on the side wall rear cover plate A by the lower punch 40 and the upper die 50, and the reference inclined wedge 30 will be limited by the inner side surface of the flange plate C of the side wall rear cover plate A when it is displaced to the left position. Then, the flange forming die 73 is displaced to the left position to press against the outer side surface of the flange plate C and forms the flange plate C to the designed target position C0. After the forming is completed, the flange forming die 73 is displaced to the left position and the reference inclined wedge 30 is displaced to the right position, and the flange plate C is separated from the reference inclined wedge 30. Thus, the side wall rear cover plate A can be smoothly demolded. During the forming process, the left lower side surface of the upper die 50 is pressed against the junction edge between the flange plate C and the middle plate A1 of the side wall rear cover plate A. The junction edge is supported by the top surface 311, and the top surface 311 and the left lower side surface of the upper die 50 reliably clamp the middle plate A1 of the side wall rear cover plate A in the up-down direction. The gap between the top surface 311 and the left lower side surface of the upper die 50 corresponds to the junction edge between the flange plate C and the middle plate A1 of the side wall rear cover plate A. When the flange forming die 73 is folded to the flange plate C, the middle plate A1 of the flange plate C remains smooth and will not be deformed. Thus, the forming quality is ensured. See Figure 8 .

[0032] As shown in FIGS. 5A and 6A, the reference inclined wedge 30 is provided with a recess 32 on the side facing the flange forming die 73. The clamping edge die 60 is arranged in the recess 32. The clamping edge die 60 is displaced leftward, and the clamping edge vertical surface 61 on the left upper part of the clamping edge die 60 is exposed below or left of the corner tip of the corner part 31. The flange forming surface 731 is provided with a transition forming surface 733 extending downward and leftward. The transition forming surface 733 is provided with a pressing edge vertical surface 732 extending downward on the right lower edge. When the flange forming die 73 is displaced rightward, the pressing edge vertical surface 732 and the clamping edge vertical surface 61 are pressed against the outer side surface and the inner side surface of the flange plate C. The clamping edge spring 35 is arranged between the reference inclined wedge 30 and the clamping edge die 60. The elastic force provided by the clamping edge spring 35 drives the clamping edge die 60 to be displaced leftward.

[0033] In the above technical solution, the included angle between the pressing edge vertical surface 732, the clamping edge vertical surface 61 and the plumb surface corresponds to the angle of the flange plate C in the state shown in FIG. 6A. Figure 4B See FIGS. 5A and 6A, Figure 6 , 6A, 7, 8, so not strictly required to be plumb, that is, to ensure that the edge of the pressure 732, 61 edge clamping plumb, in the reference wedge 30 to the left displacement, edge forming die 73 to the right displacement when the edge of the pressure 732, 61 edge clamping plate C remains parallel to the parallel posture close to and clamping edge of the plate C, due to the setting of the edge of the spring 35, the edge of the pressure 732, 61 edge clamping plate C is flexible clamping rather than rigid clamping, thus providing a flexible clamping to ensure that the edge of the pressure 732, 61 edge clamping plate C is clamped to the right displacement, the edge of the plate C is turned to the right, while from the edge of the pressure 732, 61 edge clamping gap between the extraction, until the lower edge of the edge of the plate C completely from the edge of the pressure 732, 61 edge clamping gap, the process of the edge of the plate C along with the first plastic deformation to the bottom surface 312 more close, in the edge of the forming surface 731 to the right displacement follow-up process, the edge of the plate C will continue to experience the process of plastic deformation, the transition forming surface 733 begins to resist the edge of the plate C to achieve the plastic extrusion deformation, thus after at least two times of plastic deformation after the final edge of the plate C is turned to the target position C0, effectively reducing the edge of the plate C after the rebound phenomenon occurs; in addition, when the edge of the pressure 732, 61 edge clamping edge of the plate C to the right displacement, because the clamping force is provided by the edge of the spring 35, it is easy to select the appropriate elastic clamping force, so the edge of the pressure 732, 61 edge clamping force applied to the edge of the plate C can reliably clamp and drag the edge of the plate C to the tight state of the turn, the tight state ensures that the edge of the plate C is turned as a whole with the top surface 311, the bottom surface 312 of the reference line plate surface, avoiding the wrinkles, orange peel caused by the different folding angles of the edge of the plate C. It can also be understood that the edge of the pressure 732, 61 edge clamping edge of the plate C to the right displacement, the first edge of the plate C is turned, and the edge of the plate C is turned after the transition forming surface 733, the turning angle continues to increase, until the edge of the forming surface 731 near the edge of the plate C and the last edge of the plate C is turned, and finally the edge of the plate C is pressed to the limit surface provided by the bottom surface 312, that is, the edge of the plate C is reliably turned to the target position C0.

[0034] Referring to Figure 10 , the width of the transition forming surface 733 on the edge forming die 73 is greater than or equal to the width of the edge of the plate C, and there is a flat transition platform 734 between the lower edge of the transition forming surface 733 and the edge of the pressure 732. When the edge of the plate C is completely extracted from the clamping area between the edge of the pressure 732 and the edge clamping surface 61, the constraint on the free edge of the edge of the plate C is released, and the space between the transition forming surface 733 and the bottom surface 312 is conducive to the release of the elastic deformation of the edge of the plate C. In the process of continuing to move the edge forming die 73 to the left, the transition forming surface 733 continues to extrude the edge of the plate C to the direction of approaching the bottom surface 312, and the plastic deformation of the edge of the plate C continues.

[0035] The right side of the reference inclined wedge 30 is provided with a reference inclined wedge insert 36, and the right side of the upper die seat 10 of the upper die 50 is provided with a downwardly extending upper die right insert 14. When the upper die seat 10 is displaced downwardly to the position where the upper die right insert 14 is in contact with the inclined surface on the reference inclined wedge insert 36, the reference inclined wedge 30 is displaced leftwardly. The reference inclined wedge reset spring 34 is arranged between the reference inclined wedge 30 and the lower die seat 20, and the reference inclined wedge reset spring 34 provides elastic force to drive the reference inclined wedge 30 to displace rightwardly. Through the cooperation between the upper die right insert 14 and the inclined surface on the reference inclined wedge insert 36, the upper die seat 10 can drive the reference inclined wedge 30 to displace leftwardly when the upper die seat 10 moves downwardly, which reduces the need to arrange a separate driving member to drive the reference inclined wedge 30. At the same time, the reference inclined wedge reset spring 34 is in a compressed state, and then the elastic force of the reference inclined wedge reset spring 34 drives the reference inclined wedge 30 to return to the original position after the upper die seat 10 moves upwardly to the position where the upper die right insert 14 is separated from the inclined surface on the reference inclined wedge insert 36. At this time, the top surface 311 is separated from the inner side surface of the folded edge plate C, which facilitates demolding.

[0036] The upper die right insert 14 includes an upper die insert inclined wedge 142 fixed to the left side of an upper die insert seat 141 and an upper die insert sliding pad 143 on the right side of the upper die insert seat 141. The right side of the reference inclined wedge 30 is provided with a limiting seat 23, and the left side of the limiting seat 23 is a limiting vertical surface 231. The upper die insert sliding pad 143 is in sliding cooperation with the limiting vertical surface 231 when the upper die insert inclined wedge 142 is in contact with the inclined surface on the reference inclined wedge insert 36. The arrangement of the upper die insert sliding pad 143 makes the upper die insert seat 141 not directly in contact with the limiting vertical surface 231, thereby avoiding direct sliding between the upper die insert seat 141 and the limiting vertical surface 231 to generate abrasion. At the same time, the friction coefficient of the upper die insert sliding pad 143 is small, and the sliding resistance of the upper die insert sliding pad 143 on the limiting vertical surface 231 is also reduced. When the upper die insert sliding pad 143 slides along the limiting vertical surface 231, the limiting seat 23 and the upper die right insert 14 together resist the elastic force of the reference inclined wedge reset spring 34, thereby avoiding the problem that the upper die right insert 14 is easily damaged due to the resistance of the elastic force of the reference inclined wedge reset spring 34.

[0037] The flanging forming die 73 is installed on the right upper part of the forming inclined wedge slide 70 in sliding fit with the lower die seat 20, and the upper die left insert 11 extending downward is arranged on the left side of the upper die seat 10, and when the upper die seat 10 is displaced downward to the position where the upper die left insert 11 is in abutting fit with the inclined surface on the left upper part of the forming inclined wedge slide 70, the forming inclined wedge slide 70 is displaced rightward, and the forming inclined wedge slide reset spring 71 is arranged between the forming inclined wedge slide 70 and the lower die seat 20, and the forming inclined wedge slide reset spring 71 provides elastic force to drive the wedge forming inclined wedge slide 70 to displace leftward; the fit between the upper die left insert 11 and the inclined surface on the left upper part of the forming inclined wedge slide 70 enables the upper die seat 10 to drive the forming inclined wedge slide 70 to displace rightward when the upper die seat 10 moves downward, which reduces the need for setting a separate driving member to drive the forming inclined wedge slide 70, and at the same time, enables the forming inclined wedge slide reset spring 71 to be in compressed state, and then when the upper die seat 10 moves upward to the position where the upper die left insert 11 is separated from the inclined surface on the left upper part of the forming inclined wedge slide 70, the elastic force of the forming inclined wedge slide reset spring 71 drives the forming inclined wedge slide 70 to return to the original position, at which time the flanging forming die 73 is separated from the flanging plate C, facilitating demolding.

[0038] The upper die seat 10 and the upper die cavity 50 are in sliding fit in the vertical direction, and the upper die cavity reset spring 12 is arranged between the upper end of the upper die cavity 50 and the upper die seat 10, and the upper die cavity reset spring 12 provides elastic force to drive the upper die cavity 50 to displace downward; the sliding fit in the vertical direction between the upper die cavity 50 and the upper die seat 10 enables the upper die seat 10 to continue to move downward after the upper die cavity 50 is pressed on the top of the side wall rear cover plate A, at which time the height of the upper die cavity 50 in the vertical direction is unchanged, the upper die cavity 50 moves upward relative to the upper die seat 10, and the upper die cavity reset spring 12 is compressed, and the upper die cavity 50 is stably pressed on the side wall rear cover plate A under the action of the elastic force of the upper die seat 10 and the upper die cavity reset spring 12, which ensures that the upper die cavity 50 and the lower die punch 40 stably clamp the side wall rear cover plate A before the flanging plate C is folded, and also ensures that the top surface 311 and the left lower side surface edge 51 reliably clamp the middle plate A1 of the side wall rear cover plate in the vertical direction, at which time the middle plate A1 adjacent to the flanging plate C remains smooth without warping and deforming when the flanging forming die 73 folds the flanging plate C, and in addition, the constraint clamping force applied by the upper die cavity 50 and the lower die punch 40 on the side wall rear cover plate A in this process is the appropriate clamping force provided by the pressure of the upper die cavity reset spring 12, which avoids the phenomenon that the rigid clamping force applied by the upper die cavity 50 and the lower die punch 40 on the side wall rear cover plate A causes the plate surface of the side wall rear cover plate A to be crushed, and ensures the forming quality.

[0039] The upper surface and the lower surface of the reference wedge 30 are respectively fixed with the guide slide plate 24 which is in sliding fit with the lower punch 40 and the lower die seat 20; by arranging the guide slide plate 24, on the one hand, the guide of the sliding between the reference wedge 30 and the lower punch 40 and the lower die seat 20 is realized, on the other hand, the abrasion caused by the direct contact between the reference wedge 30 and the lower punch 40 and the lower die seat 20 is avoided, meanwhile, the friction coefficient of the guide slide plate 24 is small, so that the sliding resistance between the reference wedge 30 and the lower punch 40 and the lower die seat 20 is also reduced; furthermore, the arrangement of the guide slide plate 24 guarantees the stability of the posture of the reference wedge 30 in the displacement process, especially, when the reference wedge 30 is displaced to the left position, the top surface 311 meets the design requirement of the smooth connection with the left lower position profile of the lower punch 40, so that the hidden danger of the surface difference between the top surface 311 and the left lower position profile of the lower punch 40 is reduced.

[0040] The surface of the clamping edge die 60 is fixed with the clamping edge die guide plate 37 which is in sliding fit with the inner wall of the recess 32; by arranging the clamping edge die guide plate 37, on the one hand, the guide of the sliding of the clamping edge die 60 in the recess 32 is realized, on the other hand, the abrasion caused by the direct contact between the clamping edge die 60 and the recess 32 is also avoided, meanwhile, the friction coefficient of the clamping edge die guide plate 37 is small, so that the sliding resistance between the clamping edge die 60 and the inner wall of the recess 32 is also reduced. Referring to the function and effect of the arrangement of the guide slide plate 24, especially, the structural relationship between the clamping edge vertical surface 61 on the clamping edge die 60 and the folding edge plate C when the clamping edge die 60 is displaced with the reference wedge 30 is that the clamping edge vertical surface 61 and the folding edge plate C are in parallel with each other, so that the clamping edge vertical surface 61 and the folding edge plate C are in flush abutment with each other, and the phenomenon of the twisting of the folding edge plate C in the process of folding the folding edge plate C is avoided, if the twisting phenomenon of the folding edge plate C occurs, the folding edge plate C may be torn, and the twisting deformation of the folding edge plate C cannot meet the design requirement.

[0041] The lower die seat 20 is fixed with the forming wedge slide guide plate 25 which is in sliding fit with the forming wedge slide 70; by arranging the forming wedge slide guide plate 25, on the one hand, the guide of the sliding of the forming wedge slide 70 on the lower die seat 20 is realized, on the other hand, the abrasion caused by the direct contact between the lower die seat 20 and the forming wedge slide 70 is also avoided, meanwhile, the friction coefficient of the forming wedge slide guide plate 25 is small, so that the sliding resistance of the forming wedge slide 70 on the lower die seat 20 is also reduced, that is, the stability of the posture of the forming wedge slide 70 in the displacement process is guaranteed, so that the certainty and stability of the postures of the folding edge forming surface 731, the transition forming surface 733 and the pressing edge vertical surface 732 on the folding edge forming die 73 which moves together with the forming wedge slide 70 are guaranteed, and the technical effect thereof is referred to the related description of the clamping edge vertical surface 61.

[0042] Embodiment 2

[0043] First of all, it needs to be pointed out that, referring to the drawings, the embodiments of the present application will be described in detail. Figures 4A-4CThe blank plate has been shaped into the flange plate C of the side wall rear cover plate A, the plate edge waste of the flange plate C has been cut off, and the flange plate C is at a reserved position between the initial position and the target position C0 with an angle α=60°. This embodiment 2 is a process of folding and forming the flange plate C of the side wall rear cover plate A by using the mold provided in embodiment 1, which will be described in detail below.

[0044] A forming process of a side wall rear cover gutter flange, which adopts the forming mold disclosed in embodiment 1 to form the side wall rear cover gutter flange, and includes the following steps:

[0045] S1, providing a to-be-formed side wall rear cover plate A, the flange plate C of the to-be-formed side wall rear cover plate A is at a reserved angle α=60° between the initial position and the target position C0, as shown in Figure 4A , 4B

[0046] S2, placing the middle section plate A1 of the to-be-formed side wall rear cover plate A in a flat state on the lower punch 40, the inner side surface of the middle section plate A1 is in contact with the top of the lower punch 40, the flange plate C and the plate edge part of the middle section plate A1 adjacent to the flange plate C are suspended outside the left edge of the lower punch 40, the flange plate C is in a vertical posture and located between the flange forming mold 73 and the clamping mold 60, the plate surface of the flange plate C is parallel to the pressing edge vertical surface 732 on the flange forming mold 73 and the clamping edge vertical surface 61 on the clamping mold 60; see Figure 6 ;

[0047] S3, the upper mold right insert knife 14, the upper concave mold 50 and the upper mold left insert knife 11 are driven downward by the upper mold seat 10, when the upper mold right insert knife 14 is in contact with the inclined surface on the reference inclined wedge insert knife 36, the reference inclined wedge 30 is displaced to the left to the connection position where the top surface 311 is in line with the lower left type surface of the lower punch 40; see Figure 5 , 6 , 7, the upper mold insert wedge 142 on the upper mold right insert knife 14 cooperates with the reference inclined wedge insert knife 36 to drive the reference inclined wedge 30 to displace to the left;

[0048] S4, the upper mold right insert knife 14, the upper concave mold 50 and the upper mold left insert knife 11 are continuously driven downward by the upper mold seat 10, so that the upper concave mold 50 is pressed on the formed plate surface of the outer plate surface of the to-be-formed side wall rear cover plate A in the closed mold state, and the lower punch 40 is supported on the formed plate surface of the inner plate surface of the to-be-formed side wall rear cover plate A;

[0049] ​S5, the upper die holder 10 continues to move down, the upper die left knife 11 is in contact with the inclined surface of the left side of the forming inclined wedge slide 70, and the forming inclined wedge slide 70 is displaced to the right, so that the edge pressing vertical surface 732 is in contact with the edge pressing vertical surface 61 to clamp the edge folding plate C, and drive the edge folding plate C to fold from the initial position to the target position, until the edge forming surface 731 presses the outer side plate surface of the edge folding plate C, and the inner side plate surface of the edge folding plate C is attached to the bottom surface 312, see Figure 6 、 7 、8、9、10;

[0050] S6, the upper die holder 10 moves up, the forming inclined wedge slide 70 and the reference inclined wedge 30 are reset by the forming inclined wedge slide reset spring 71 and the reference inclined wedge reset spring 34 respectively, and the edge pressing vertical surface 732 is located on the left side of the edge folding plate C when the forming inclined wedge slide 70 is in the reset position; the upper concave die 50 moves up to lift and separate from the side wall rear cover plate A, and then picks up the side wall rear cover plate A, see Figure 11 .

[0051] In the above S5 step, the edge pressing vertical surface 732 and the edge pressing vertical surface 61 clamp the edge folding plate C and fold it to the target position C0 in a clamped state; when the clamping gap formed by the edge pressing vertical surface 732 and the edge pressing vertical surface 61 is displaced to release the edge folding plate C from the clamping gap, the edge folding plate C is released from the elastic deformation to the transition forming surface 733 on the edge forming die 73; the edge forming die 73 continues to displace to the right, and the transition forming surface 733 presses the edge folding plate C to continue to fold to the target position C0; the edge forming die 73 continues to displace to the right, and the intersection line of the transition forming surface 733 and the edge forming surface 731 presses the edge folding plate C to continue to fold to the target position C0, until the edge forming surface 731 folds the edge folding plate C to the target position C0 between the edge forming surface 731 and the bottom surface 312.

[0052] It should be noted that during the process of applying clamping to the edge folding plate C by the edge pressing vertical surface 732 and the edge pressing vertical surface 61 and folding to the target position C0 in a clamped state, the plate body part of the edge folding plate C located inside and outside the clamping area experiences bidirectional plastic deformation, one direction is plastic deformation to the side where the target position C0 is located, and the other direction is plastic deformation away from the side where the target position C0 is located. Due to the bidirectional plastic deformation, it is ensured that the plastic deformation to the side where the target position C0 is located is more stable, and the subsequent plastic deformation formed by the pressing action of the transition forming surface 733 and the edge forming surface 731 causes the edge folding plate C to be stably folded and positioned at the target position C0.

[0053] In the above forming process, by controlling the edge folding plate C to be between the initial position and the target position C0 during the drawing process, α=60° is reserved, and only one edge folding is required for the subsequent edge folding surface, which shortens the forming process and reduces the edge folding die, thereby reducing the production cost; at the same time, the use of the edge folding die can improve the forming quality of the edge folding plate C.

Claims

1. A forming mold for a side panel rear cover with a water channel flange, wherein an upper concave mold (50) is disposed on an upper mold base (10) and a lower convex mold (40) is disposed on a lower mold base (20). In the mold-closed state, the upper concave mold (50) presses against the outer pre-formed plate surface of the side panel rear cover (A) and the lower convex mold (40) supports the inner pre-formed plate surface of the side panel rear cover (A), characterized in that: A reference wedge (30) with left and right displacement is provided below the lower punch (40). The upper left side of the reference wedge (30) has an angled part (31) formed by the top surface (311) and the bottom surface (312). The included angle formed by the top surface (311) and the bottom surface (312) is the same as the forming design included angle θ0 of the middle section plate (A1) and the folded edge plate (C) of the side rear cover plate (A). The reference wedge (30) is moved to the left to the connection position where the top surface (311) and the lower left profile of the lower punch (40) are connected, or the reference wedge (30) is moved to the right to the clearance position where the top surface (311) and the lower left profile of the lower punch (40) are arranged with a vertical spacing. On the lower mold base (20) on the left side of the reference wedge (30), there is a folding forming mold (73) that moves in the left and right directions. The folding forming mold (73) has a folding forming surface (731). The folding forming surface (731) is parallel to the bottom surface (312). The folding forming mold (73) moves to the right and the reference wedge (30) moves to the left until the folding forming surface (731) presses against the outer side of the folding plate (C). The inner side of the folding plate (C) is attached to the bottom surface (312). In this state, the lower left side profile edge (51) of the upper die (50) is pressed on the junction edge of the folding plate (C) and the middle section plate (A1) of the side rear cover plate (A). A recess (32) is provided on the side of the reference wedge (30) facing the folding forming mold (73). A clamping mold (60) is provided at the recess (32). When the clamping mold (60) moves left and right and moves to the left, the clamping surface (61) on the upper left side of the clamping mold (60) is exposed below the corner tip or to the lower left of the corner part (31). A transition forming surface (733) extending downward is provided on the right side of the folding forming surface (731). A pressing surface (732) extending downward is provided at the lower right edge of the transition forming surface (733). When the folding forming mold (73) moves to the right, the pressing surface (732) and the clamping surface (61) press against each other on the outer and inner sides of the folding plate (C). A clamping spring (35) is provided between the reference wedge (30) and the clamping mold (60). The elastic force provided by the clamping spring (35) drives the clamping mold (60) to move to the left. The width of the transition forming surface (733) on the folding forming mold (73) is greater than or equal to the width of the folding plate (C), and there is a flat transition platform (734) between the lower edge of the transition forming surface (733) and the pressing edge surface (732).

2. The forming mold for the side panel rear cover water channel flange according to claim 1, characterized in that: A reference wedge inserter (36) is provided on the right side of the reference wedge (30). An upper die right inserter (14) extending downward is provided on the upper die seat (10) on the right side of the upper die (50). When the upper die seat (10) moves downward until the upper die right inserter (14) and the inclined surface on the reference wedge inserter (36) come into contact, the reference wedge (30) moves to the left. A reference wedge return spring (34) is provided between the reference wedge (30) and the lower die seat (20). The reference wedge return spring (34) provides elastic force to drive the reference wedge (30) to move to the right.

3. The forming mold for the side panel rear cover water channel flange according to claim 2, characterized in that: The upper die right insert (14) includes an upper die insert wedge (142) fixed to the left side of the upper die insert holder (141) and an upper die insert sliding pad (143) on the right side of the upper die insert holder (141). A limiting seat (23) is provided on the right side of the reference wedge (30), and a limiting surface (231) is provided on the left side of the limiting seat (23). When the upper die insert wedge (142) abuts against the inclined surface on the reference wedge insert (36), the upper die insert sliding pad (143) slides with the limiting surface (231).

4. The forming mold for the side panel rear cover water channel flange according to claim 3, characterized in that: The folding forming mold (73) is installed on the upper right part of the forming wedge slide (70) which is in sliding fit with the lower mold base (20). The upper mold base (10) on the left side of the upper die (50) is provided with a downward extending upper die left insert (11). When the upper mold base (10) moves downward until the upper die left insert (11) abuts against the inclined surface of the upper left of the forming wedge slide (70), the forming wedge slide (70) moves to the right. A forming wedge slide return spring (71) is provided between the forming wedge slide (70) and the lower mold base (20). The forming wedge slide return spring (71) provides elastic force to drive the wedge forming wedge slide (70) to move to the left.

5. The forming mold for the side panel rear cover water channel flange according to claim 1, characterized in that: The upper die (50) and the upper die base (10) are in a sliding fit in the vertical direction. An upper die return spring (12) is provided between the upper end of the upper die (50) and the upper die base (10). The upper die return spring (12) provides elastic force to drive the upper die (50) to move downward.

6. The forming mold for the side panel rear cover water channel flange according to claim 1, characterized in that: The upper and lower surfaces of the reference wedge (30) are respectively fixed with guide plates (24) that form a sliding fit with the lower punch (40) and the lower die base (20).

7. The forming mold for the side panel rear cover water channel flange according to claim 1, characterized in that: The clamping mold (60) has a clamping mold guide plate (37) fixed on its surface, which slides with the inner wall of the recess (32).

8. The forming mold for the side panel rear cover water channel flange according to claim 4, characterized in that: The lower mold base (20) is fixed with a forming wedge slide guide plate (25) that forms a sliding fit with the forming wedge slide (70).

9. A forming process for the flanged edge of the drainage channel on the side panel rear cover, wherein the forming mold described in any one of claims 4 to 8 is used to form the flanged edge of the drainage channel on the side panel rear cover, characterized in that: Includes the following steps: S1. Provide a side panel back cover (A) to be formed. The folded edge plate (C) of the side panel back cover (A) to be formed is reserved with α=60° between the initial position and the target position (C0). The waste material on the edge of the folded edge plate (C) has been removed. S2. The middle section plate (A1) of the side rear cover plate (A) is placed flat on the lower punch (40). The inner side of the middle section plate (A1) is in contact with the top of the lower punch (40). The edge plate (C) and the edge of the middle section plate (A1) adjacent to the edge plate (C) are suspended outside the left edge of the lower punch (40). The edge plate (C) is in a vertical position and is located between the edge forming mold (73) and the clamping mold (60). The plate surface of the edge plate (C) is parallel to the pressing edge surface (732) on the edge forming mold (73) and the clamping edge surface (61) on the clamping mold (60). S3. The upper mold base (10) drives the upper mold right insert (14), upper die (50) and upper mold left insert (11) to move downward. When the upper mold right insert (14) abuts against the inclined surface on the reference wedge insert (36), the reference wedge (30) moves to the left to the connection position where the top surface (311) and the lower left side of the lower punch (40) are connected. S4. The upper mold base (10) continues to drive the upper mold right insert (14), upper die (50) and upper mold left insert (11) to move downward, so that the upper die (50) is pressed on the outer side panel of the side rear cover plate (A) to be formed in the mold-closed state, and the lower punch (40) is supported on the inner side panel of the side rear cover plate (A) to be formed. S5. The upper mold base (10) continues to move downward. When the upper mold left insert knife (11) abuts against the inclined surface on the left side of the forming wedge slide (70), the forming wedge slide (70) moves to the right, so that the pressing edge surface (732) and the clamping edge surface (61) clamp the folding plate (C) and drive the folding plate (C) to fold from the initial position to the target position until the folding forming surface (731) presses against the outer plate surface of the folding plate (C) and the inner plate surface of the folding plate (C) is attached to the bottom surface (312). S6. The upper mold base (10) moves upward, and the forming wedge slide (70) and the reference wedge (30) are reset by the forming wedge slide reset spring (71) and the reference wedge reset spring (34) respectively. When the forming wedge slide (70) is in the reset position, the projection of the pressing edge vertical surface (732) on the horizontal plane is located on the left side of the folded edge plate (C). The upper die (50) moves upward and lifts up to separate from the side wall rear cover plate (A) and picks up the side wall rear cover plate (A).

10. The forming process of the side panel rear cover water channel flange according to claim 9, characterized in that: In step S5, the pressing edge surface (732) and the clamping edge surface (61) clamp the folded edge plate (C) and fold it towards the target position (C0) in a clamped state; when the clamping gap formed by the pressing edge surface (732) and the clamping edge surface (61) moves to the point where the folded edge plate (C) is released from the clamping gap, the folded edge plate (C) returns to its original position on the side where the transition forming surface (733) on the folding forming mold (73) is located, releasing elastic deformation; the folding forming mold (73) continues to move to the right. The transition forming surface (733) presses against the folding plate (C) and continues to fold towards the target position (C0); the folding forming mold (73) continues to move to the right, and the intersection line of the transition forming surface (733) and the folding forming surface (731) presses against the folding plate (C) and continues to fold towards the target position (C0) until the folding forming surface (731) folds the folding plate (C) and positions it at the target position (C0) between the folding forming surface (731) and the bottom surface (312).

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