CN110280663B - Top cap inner panel stamping die - Google Patents

Abstract

The invention discloses a top cover inner plate stamping die, wherein after a blank holder is lifted upwards by a theoretical stroke, a blank is put on the blank holder to trigger a signal to a press, a press slide block drives an upper die assembly body to move downwards integrally, an upper die base contacts the blank and completes die assembly, then a trimming cutter block edge is put into the upper die base to trim corner area materials, a male die starts to form local part characteristics, meanwhile, a skylight pressure plate gradually compresses skylight inner ring blanks to enable other areas to be formed before a skylight edge covering area is formed, finally, the blank holder moves downwards along with the upper die assembly body, the whole forming process is finished after the blank holder is upset to a lower die base, the material flow of the skylight area is controllable in the process, and the forming process of the top cover inner plate is. The invention can realize the regulation and control of the punch forming performance of the inner plate of the top cover and improve the forming quality of the inner plate of the top cover.

Description

A top cover inner plate stamping die

technical field

The invention relates to the technical field of die for stamping cover parts of a vehicle body, in particular to a stamping die for an inner panel of a top cover.

Background technique

Under the new situation, the increasingly severe automobile energy saving and emission reduction standards and the preference of automobile consumers for the diversified functions of the top cover have brought new challenges and demands to the design and manufacture of the top cover assembly. The high-efficiency and high-performance manufacturing process of the top cover inner plate parts is the basis for realizing the good mechanical properties and good dimensional accuracy of the top cover assembly, so the development of the top cover inner plate stamping die is particularly important and urgent. When the roof inner plate mold of the prior art is used for forming, the plastic flow consistency of the material in the skylight area is poor, the plastic deformation of the inner and outer plates of the roof is insufficient and the rigidity is weak, the surface springback is seriously out of tolerance, and the production is sensitive and stable to steel coils. Poor performance, long mold debugging cycle, etc.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a top cover inner plate stamping die, so as to solve the above-mentioned problems in the prior art, effectively improve the consistency of the plastic flow of the material in the skylight area, enhance the plastic deformation degree of the inner and outer plates of the top cover, and effectively control The surface springback exceeds tolerance, realizes the control of the top cover stamping and forming, and ensures that the high-efficiency and high-performance top cover inner plate stamping parts solve the quality problems such as insufficient rigidity and excessive size of the top cover assembly that affect the body function.

In order to achieve the above purpose, the present invention provides the following solutions: the present invention provides a top cover inner plate stamping die, including an upper die assembly assembly and a lower die assembly assembly, and the upper die assembly assembly includes an upper die base and a skylight pressing plate , the lower die assembly component includes a lower die seat, a blank holder, a punch and a trimming knife block;

The skylight pressing plate is detachably installed on the inner side of the upper die base, and the skylight pressing plate is used for cooperating with the punch to form part features; the punch is fastened to the lower mould with screws On the seat, the blank holder with a tablet positioner on the top is detachably fixedly connected to the lower die base and located outside the lower die holder; the bottom of the blank holder is installed with a blank holder The blank holder is used to limit the movement of the blank holder in the vertical direction, and the lower die base is provided with an escape hole, and the punch rod passes through the escape hole and the press. The air cushion is in contact and connected; the trimming cutter block with the gasket installed at the bottom is fixed on the lower die base with screws, and together with the upper die base completes the cutting of the blank in the corner area; the upper die base and the lower die base are Through the sliding and guiding connection of the guide plate, the blank to be processed is placed between the upper die base and the lower die base.

Further, a plurality of pressure plate limit blocks are evenly installed on the top of the skylight holding plate, and the holding plate limit blocks are used to limit the movement of the skylight holding plate in the vertical direction.

Further, a guide plate and a sliding guide of the upper die base are installed around the side wall of the skylight pressing plate, and a solid reagent is embedded in the inside of the guide plate.

Further, a drawing bead bead is machined on the skylight press plate, and a drawing bead groove matching the drawing bead bead is machined on the profile surface of the punch.

Further, an elastic device is installed on the top of the upper mold base, and the elastic device is used to drive the movement of the skylight pressing plate in the vertical direction, and the middle part of the upper mold base is processed to bear the pressure of the skylight. The characteristic surface of the impact force at the bottom dead center of the material plate; the elastic device is a spring.

Further, a plurality of circular holes or elliptical holes are evenly distributed on the side wall of the punch, and a through hole with a diameter of 5 mm is processed in the area of the profile surface of the punch close to the side wall.

Further, a guide plate and a sliding guide of the lower die base are installed around the side wall of the blank holder, and the inside of the guide plate is inlaid with a solid reagent for reducing the wear of the guide plate.

Further, a drawing bead groove is machined on the profile surface of the blank holder, and a drawing bead convex rib that matches the drawing bead groove is machined on the profile surface of the upper die base, and is drawn. The fillet radius of the corner area of the bead is greater than 30mm.

Further, the middle part of the lower die seat is processed with a characteristic surface for bearing the impact force of the bottom dead center of the blank holder, and the middle part of the lower die seat is also installed with a number of surfaces for balancing the lateral force of the punch. The positioning key; the top of the lower die base is installed with a die base stop block and a storage element, the die base stop block is used to limit the movement of the upper die assembly assembly in the vertical direction, and the storage element is used for The upper mold assembly assembly is supported when the mold is stored.

Further, the gap between the blank holder and the punch in the horizontal direction constitutes the mold parting area of the outer ring, and the gap between the upper die base and the skylight blanking plate in the horizontal direction constitutes the mold parting area of the inner ring.

Further, a gasket is installed at the bottom of the trimming knife to adjust the cutting edge entry time, and the upper die base is processed with a corresponding trimming die edge.

The present invention has achieved the following technical effects with respect to the prior art:

In the present invention, in the stamping die for the inner plate of the top cover, after the draw bead groove of the blank holder and the draw bead bead of the upper die base are pressed against the outer ring sheet material, the trimming cutter block gradually cuts the material in the corner area, and the punch starts to form. In the case of local part features, the drawbead rib of the skylight press plate and the groove of the punch drawbead compress the material inside the skylight, and the fit force between the upper and lower model surfaces is properly adjusted to make the plastic flow of the material during the molding process of the skylight area feature. It can effectively improve the consistency of the plastic flow of the material in the skylight area, enhance the plastic deformation of the inner and outer panels of the top cover, effectively control the excessive springback of the profile, and realize the control of the stamping and forming of the top cover.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some of the present invention. In the embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

Fig. 1 is the structural representation of the embodiment of the top cover inner plate mould of the present invention;

Fig. 2 is the structural schematic diagram of the present invention when the inner mold blank holder of the top cover is lifted and the sheet material is put in;

Figure 3 is a schematic structural diagram of the roof inner plate mold skylight pressing plate of the present invention when the plate is pressed;

4 is a schematic structural diagram of the top cover inner plate mold of the present invention when it is at the bottom dead center;

Among them, 1 blanking plate limiter, 2 elastic device, 3 skylight blanking plate, 4 blanking plate guide, 5 upper die base, 6 blank positioner, 7 die base stopper, 8 blank holder guide, 9 Upper die seat guide plate, 10 edge holder ring limit block, 11 hit rod, 12 lower die holder, 13 positioning key, 14 punch die, 15 edge holder ring, 16 edge trimming knife block, 17 gasket.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The purpose of the present invention is to provide a top cover inner plate stamping die, so as to solve the above-mentioned problems in the prior art, effectively improve the consistency of the plastic flow of the material in the skylight area, enhance the plastic deformation degree of the inner and outer plates of the top cover, and effectively control The surface springback exceeds tolerance, realizes the control of the top cover stamping and forming, and ensures that the high-efficiency and high-performance top cover inner plate stamping parts solve the quality problems such as insufficient rigidity and excessive size of the top cover assembly that affect the body function.

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

Please refer to FIGS. 1-4, wherein, FIG. 1 is a schematic structural diagram of an embodiment of a top cover inner plate mold according to the present invention; FIG. 2 is a structural schematic diagram of the present invention when the inner mold blank holder of the top cover is lifted and put into a sheet material; FIG. 3 is a schematic diagram of the structure Figure 4 is a schematic structural diagram of the top cover inner plate mold of the present invention when it is at the bottom dead center.

As shown in Figures 1-4, the present invention provides a top cover inner plate stamping die, including an upper die assembly component and a lower die assembly component, the upper die assembly component includes an upper die base 5, a skylight pressing plate 3; the lower die assembly The assembly includes a lower die base 12 , a blank holder 15 , and a punch 14 . After the blank holder 15 is lifted up by the theoretical stroke, the blank is placed on the blank holder 15 to trigger a signal to the press, and the press slider drives the upper die assembly to move downward as a whole. After the upper die base 5 contacts the blank, the clamping action is completed. ;Then the trimming knife block 16 is inserted into the upper die base to cut the material in the corner area, the punch 14 begins to form local part features, and at the same time, the skylight pressing plate 3 gradually presses the skylight inner ring blank, so that other areas are formed before the skylight wrapping surface. area; the blank holder 15 moves down together with the upper die assembly, and the whole forming process ends after the upsetting die in the lower die base 12. During this process, the material flow in the skylight area is controllable, and the forming process of the top cover inner panel is stable and reliable.

The skylight pressing plate 3 is detachably connected to the upper die base 5, located on the inner side of the upper die base 5, and cooperates with the punch 14 to form part features during operation. The top of the skylight pressure plate 3 is evenly installed with a certain number of pressure plate limit blocks 1 to control the movement of the skylight pressure plate 3 in the vertical direction. 5. Sliding guide, the solid reagent embedded in the platen guide plate 4 is used to reduce the wear of the guide plate.

The upper die base 5 is processed with a curved surface shape, and cooperates with the punch 14 and the blank holder 15 to form part features during operation. An elastic device 2 is installed on the top of the upper die base 5 to drive the movement of the skylight pressing plate 3 in the vertical direction. The spring device can be an ordinary spring or a nitrogen gas spring; In order to bear the impact force when the skylight pressing plate 3 is located at the bottom dead center; the vertical wall of the upper die base 5 is processed with a guide sliding surface, which is used for the guiding of the skylight pressing plate 3 .

The punch 14 is tightly fixed on the lower die base 12 by means of screw connection. A certain number of round holes or elliptical holes are evenly distributed on the side wall of the punch 14. The blank holder 15 is located on the outside of the punch 14 and is detachably connected to the lower die base 12. A guide plate is installed around the side wall of the blank holder 15 to slide and guide the lower die holder 12. The solid reagent embedded in the guide plate is used to reduce the guide plate. Wear; the bottom of the blank holder 15 is equipped with a blank holder limit block 10 and a driving rod 11, the blank holder stop block 10 is used to control the movement of the blank holder 15 in the vertical direction, and the beat rod 11 is used to transmit the press air cushion The pressure lifts the blank holder 15.

The 15-shaped surface of the blank holder is machined with a draw bead groove, the 5-shaped surface of the upper die base is machined with a matching draw bead bead, and the corner radius of the draw bead corner area is greater than 30mm; There are drawbead convex ribs, and a matching drawbead groove is machined on the 14-shaped surface of the punch. The gap between the 3-shaped surface of the skylight pressing plate and the 14-shaped surface of the punch is 0.15-0.20mm less than the thickness of the sheet.

A certain number of characteristic surfaces are processed in the middle of the lower die base 12 to withstand the impact force of the bottom dead center of the blank holder 15; a certain number of positioning keys 13 are installed in the middle of the lower die base 12 to balance the lateral force of the punch 14; the top of the lower die base 12 Install the mold seat limit block 7 and the storage element, the mold seat limit block 7 is used to limit the movement of the upper mold assembly in the vertical direction, and the storage element is used to support the upper mold assembly when the mold is stored. The limit block is square; the positioning key 13 is truncated. The vertical wall of the lower die seat 12 is machined with a guide sliding surface, and the guide sliding surface is respectively provided with a blank holder guide plate 8 and an upper die holder guide plate 9, the lower die holder 12 is also machined with avoidance holes, and the bead holder 15 is provided with a rod 11. After passing through the avoidance hole, it is connected to the air cushion of the press.

The upper mold seat 5 and the lower mold seat 12 are slidably guided by the upper mold seat guide plate 9, and the solid reagent embedded in the guide plate is used to reduce friction.

The trimming cutter block 16 is fixed on the lower die base 12 by means of screws, and the thickness specifications of the gasket 17 installed at the bottom are 0.5mm, 1mm, 2mm and 5mm.

The gap between the blank holder 15 and the punch 14 in the horizontal direction constitutes the outer ring mold parting area, and the gap between the upper die base 5 and the skylight blanking plate 3 in the horizontal direction constitutes the inner ring mold parting area.

The working of the top cover inner plate stamping die includes five steps:

Step 1, the blank holder 15 receives the air cushion thrust under the press to lift the theoretical stroke, the inner plate material of the top cover is put on the profile surface of the blank holder 15, and its movement in the surface is controlled by the material positioner 6;

Step 2: The sheet positioner 6 triggered by the sheet material transmits a signal to the press, and the press drives the upper die assembly assembly down from the top dead center, and after touching the blank holder 15, it drives the blank holder 15 to move down together, and the upper die holder moves down. 5. The drawbead convex rib and the blank holder ring 15. The drawbead groove works together to complete the locking of the material and realize the clamping action, and the sheet material begins to plastically deform;

Step 3: The edge trimming knife block 16 is inserted into the upper die base to cut the material in the corner area, the punch 14 begins to form the part features of the partial top cover inner panel, and the skylight pressing plate 3 contacts the sheet material and cooperates with the punch 14 to complete the inner plate of the skylight. The material is pressed and descended together with the upper die assembly components;

Step 4. When the press moves to the bottom dead center, the limit block 10 of the blank holder dies on the characteristic surface of the lower die base 12, the upper and lower model surfaces are completely fitted, and the part forming is completed;

Step 5: The upper die assembly group moves upward, the air cushion under the press pushes the blank holder 15 upward, the molded parts are separated from the upper die and the punch 14, and the upper die assembly assembly returns to the starting position.

The parting area of the outer ring formed by the blank holder 15 and the punch 14 in the horizontal direction is about 5-8mm, and the parting area of the inner ring formed by the upper die base 5 and the skylight holding plate 3 in the horizontal direction is about 3-5mm.

The cross-sectional shape of the drawbead is not limited (including circular cross-section, rectangular cross-section, special-shaped cross-section), and the cross-sectional shape and depth of different regions of the same part can be differentiated according to the characteristics of the part. Open), the number of drawbeads (1, 2) can be appropriately selected according to the characteristics of the part.

The contact between the guide plate 9 of the upper die base and the guide sliding surface is prior to the contact between the guide plate of the skylight pressing plate 3 and the guide sliding surface, and the preferred value is 50 mm.

The invention can effectively solve the problems of poor plastic flow consistency of the material in the skylight area of the inner panel of the roof, insufficient plastic deformation of the edging surfaces of the inner and outer panels of the roof, weak rigidity and serious springback of the part profile, etc. The inner plate stamping formability is regulated, which improves the forming quality of the inner plate of the top cover. The top cover inner plate stamping die, the material in the corner area at the initial stage of forming is cut off by the trimming cutter block, and the inner and outer ring parting areas make the bonding force between the upper and lower model surfaces adjustable, making the molding process of the skylight area controllable and effectively improving The consistency of the plastic flow of the material in the sunroof area enhances the plastic deformation of the inner and outer panels of the roof, effectively controls the excessive springback of the profile, and is conducive to solving the quality of the body function such as insufficient rigidity and excessive size of the roof assembly. The problem is to realize the control of the stamping formability of the top cover.

In the present invention, specific examples are used to illustrate the principles and implementations of the present invention, and the descriptions of the above embodiments are only used to help understand the method and the core idea of the present invention; There will be changes in the specific implementation manner and application scope of the idea of the invention. In conclusion, the contents of this specification should not be construed as limiting the present invention.

Claims (7)

1. The utility model provides a top cap inner panel stamping die which characterized in that: the device comprises an upper die assembly component and a lower die assembly component, wherein the upper die assembly component comprises an upper die holder and a skylight pressure plate, and the lower die assembly component comprises a lower die holder, a blank holder, a male die and a trimming knife block;

the skylight pressing plate is detachably arranged on the inner side of the upper die base and is used for matching with the male die to form part characteristics; the male die is fastened on the lower die holder through screws, and the blank holder with the material sheet positioner arranged at the top is detachably and fixedly connected with the lower die holder and is positioned on the outer side of the lower die holder; the bottom of the blank holder is provided with a blank holder limiting block and a striking rod, the blank holder limiting block is used for limiting the movement of the blank holder in the vertical direction, the lower die holder is provided with an avoiding hole, and the striking rod penetrates through the avoiding hole to be in contact connection with an air cushion of the press; the trimming cutter block with the gasket arranged at the bottom is fixed on the lower die base through a screw and finishes cutting the blank of the corner area together with the upper die base; the upper die holder and the lower die holder are connected in a sliding guide mode through a guide plate, and a blank to be processed is placed between the upper die holder and the lower die holder; a gap between the blank holder and the male die in the horizontal direction forms an outer ring die separation area, and a gap between the upper die holder and the skylight material pressing plate in the horizontal direction forms an inner ring die separation area;

a draw bead convex rib is processed on the skylight pressure plate, and a draw bead groove matched with the draw bead convex rib is processed on the molded surface of the male die; and a draw bead groove is formed in the molded surface of the blank holder, a draw bead convex bead matched with the draw bead groove is formed in the molded surface of the upper die holder, and the fillet radius of a corner area of the draw bead is larger than 30 mm.

2. The header inner panel stamping die of claim 1, wherein: a plurality of pressure plate limiting blocks are uniformly installed at the top of the skylight pressure plate and used for limiting the movement of the skylight pressure plate in the vertical direction.

3. The header inner panel stamping die of claim 1, wherein: a guide plate and an upper die seat are arranged on the periphery of the side wall of the skylight material pressing plate in a sliding guide mode, and a solid reagent is inlaid in the guide plate.

4. The header inner panel stamping die of claim 1, wherein: an elastic device is arranged at the top of the upper die holder and used for driving the skylight pressing plate to move in the vertical direction, and a characteristic surface used for bearing the impact force of the bottom dead center of the skylight pressing plate is processed in the middle of the upper die holder; the elastic device is a spring.

5. The header inner panel stamping die of claim 1, wherein: a plurality of round holes or elliptical holes are uniformly distributed on the side wall of the male die, and through holes with the diameter of 5mm are processed in the area, close to the side wall, on the molded surface of the male die.

6. The header inner panel stamping die of claim 1, wherein: and a guide plate and a lower die holder are arranged on the periphery of the side wall of the blank holder in a sliding guide manner, and a solid reagent for reducing the abrasion of the guide plate is embedded in the guide plate.

7. The header inner panel stamping die of claim 1, wherein: the middle part of the lower die holder is provided with a characteristic surface for bearing the impact force of the bottom dead center of the blank holder, and the middle part of the lower die holder is also provided with a plurality of positioning keys for balancing the lateral force of the male die; the die holder limiting block is used for limiting the movement of the upper die assembly component in the vertical direction, and the storage element is used for supporting the upper die assembly component when the die is stored.

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