Progressive forming die for automobile front longitudinal beam inner plate assembly and forming process of progressive forming die

Abstract

The invention relates to an automobile front longitudinal beam inner plate assembly progressive forming die and a forming process thereof. The automobile front longitudinal beam inner plate assembly progressive forming die is characterized by comprising a die base, a trimming die, a calendaring die, a bending die, a punching die and a cutting die. When the automobile front longitudinal beam inner plate assembly is subjected to progressive die forming, a one-die two-outlet mode is adopted, and the production efficiency can be improved by times; besides, in the edge cutting operation, a step-by-step punching mode and a region-by-region punching mode are combined in a frame producing region on the plate, it is guaranteed that punching is conducted on the middle portion and the edge of the plate in one working procedure in the breadth direction of the plate, and the situations of product deformation and plate tearing caused by single-side position punching and local punching can be effectively prevented; besides, when the automobile front longitudinal beam inner plate assembly is bent, a step-by-step bending mode is adopted, the springback phenomenon caused by the fact that a product is not bent in place due to one-time bending is avoided, and the situation that a bent part is torn due to the fact that the single-time bending amplitude is too large is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts processing, in particular to a progressive forming die for an inner plate assembly of an automobile front longitudinal beam and a forming process thereof. Background Art

[0002] When the inner panel assembly of the front longitudinal beam of an automobile is processed and formed, progressive die processing is generally adopted; conventional progressive die processing and forming adopts a one-die-one-out forming method. On the one hand, this forming method has low production efficiency for this product, and on the other hand, it is easy to cause sheet deformation caused by irregular cutting edge areas during the production process; later, a one-die-two-out processing method was adopted; however, in the process of processing the inner panel assembly of the front longitudinal beam of an automobile, the sheet cutting method of the contour edge material on the sheet material did not adopt step-by-step sheet cutting and area-by-area sheet cutting, but directly punched the whole body, which still caused the problem of sheet deformation; in addition, when performing the bending operation, the one-time bending forming is prone to springback at the bending point, resulting in the product being not bent in place, and cracks are prone to occur at the bending point, affecting the quality of the product. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a progressive forming mold and a forming process for a progressive forming frame plate assembly of a general automobile front longitudinal beam inner plate assembly, which can solve the problem that direct punching of the progressive forming frame plate of the general automobile front longitudinal beam inner plate assembly is prone to plate deformation and tearing, and the problem that a single bending operation causes the product to easily rebound and tear at the bending point.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: a progressive forming die for the inner panel assembly of the front longitudinal beam of an automobile, the innovation of which is that it includes a die base, a trimming die, a calendering die, a bending die, a punching die and a cutting die; The mold base has two exits through one mold of the sheet material; the mold base is provided with a trimming station, a calendering station, a first bending station, a first empty station, a second bending station, a second empty station, a punching station, a third empty station and a cutting station in sequence along the extension direction; the trimming mold is arranged at the trimming station of the mold base; the calendering mold is arranged at the calendering station of the mold base; the bending mold has a pair and is respectively arranged at the first bending station and the second bending station of the mold base; the punching mold is arranged at the punching station on the mold base; the cutting mold is arranged at the cutting station of the mold base; The trimming stations include a positioning trimming station, a first outer contour trimming station, and a second outer contour trimming station; The trimming die at the positioning trimming station is provided with a positioning edge hole, a progressive hole and a first blanking hole; the positioning edge hole is located at the edge position of the trimming die close to both sides; the progressive hole is located at the horizontal center line position of the trimming die; the first blanking hole has a pair and is symmetrically arranged on both sides of the middle center line position of the trimming die; The trimming die at the first outer contour trimming station is provided with a first edge trimming hole, a first intermediate trimming hole and a first main trimming hole; the first edge trimming hole is provided at a position close to the edge of the trimming die; the first intermediate trimming hole is provided at a midline position of the trimming die, and a sheet material cutting area of ​​the first intermediate trimming hole is connected to an end of a sheet material cutting area of ​​one of the first blanking holes; the first main trimming hole is provided at a position close to the edge of the other side of the trimming die, and a sheet material cutting area of ​​the first main trimming hole is connected to a sheet material cutting area of ​​another first blanking hole; The trimming die at the second outer contour trimming station is provided with a second intermediate trimming hole, a second main trimming hole and a second edge trimming hole; the second intermediate trimming hole is arranged at the center line of the trimming die, and the sheet material cutting area of ​​the second intermediate trimming hole is connected with the end of the sheet material cutting area of ​​one of the first blanking holes; the second main trimming hole is arranged at a position close to the edge of one side of the trimming die, and the sheet material cutting area of ​​the second main trimming hole is connected with the area after the sheet material of the first edge trimming hole and the first intermediate trimming hole is cut; the second edge trimming hole is arranged at a position close to the edge of the trimming die; The calendering die at the calendering station is provided with calendering grooves on both sides of the center line of the die base; The bending mold at the first bending station and the bending mold at the second bending station are both provided with placement grooves corresponding to the calendering grooves, and both sides of the bending mold at the first bending station and both sides of the bending mold at the second bending station are provided with side cavities for accommodating the bending of the sheet material; The first empty station and the second empty station are respectively provided with a first sheet material placement seat after the sheet material has completed the first bending and a second sheet material placement seat after the sheet material has completed the second bending, and the first sheet material placement seat is provided with a first limiting card groove for accommodating the sheet material flange after the first bending; the second sheet material placement seat is provided with a second limiting card groove for accommodating the sheet material flange after the second bending; The punching die at the punching station is provided with a second blanking hole and a waist-shaped blanking hole; the second blanking hole and the waist-shaped blanking hole each have a pair and are symmetrically arranged on both sides of the midline position of the punching die; The third empty station is provided with a cavity for accommodating the punched sheet material; The cutting mold at the cutting station is provided with an outer frame blanking hole and an inner frame blanking hole; the outer frame blanking hole has a pair and is respectively arranged at the edge position of the outer side of the cutting mold; the inner frame blanking hole is arranged at the center line position of the cutting mold; An upper punching die is correspondingly arranged at each station on the mold base, and a punch is correspondingly arranged at each station on the upper punching die.

[0005] A forming process for an inner panel assembly of a front longitudinal beam of an automobile, the innovation of which is as follows: S1: Sheet positioning and trimming: Place the sheet from the feed port into a one-die-two-outlet progressive die; at the positioning and trimming station of the progressive die, use the upper punch and the trimming die to process the positioning edge hole, the progressive hole and the first blanking hole, and the three are formed simultaneously; S2: Second trimming of sheet metal: At the first outer contour trimming station of the progressive die, the first edge trimming hole, the first middle trimming hole and the first main trimming hole are formed simultaneously by using the upper punch and the trimming die; S3: The third trimming of the sheet: At the second outer contour trimming station of the progressive die; the second intermediate trimming hole, the second main trimming hole and the second edge trimming hole are processed by the upper punch and the trimming die, and the three are formed simultaneously; S4: sheet material calendering: the sheet material after the three trimming operations is moved to the calendering station of the progressive die; the upper punch and the calendering die are used to calender the concave position on the sheet material to form a calendering groove; S5: First bending of sheet metal: After the sheet metal rolling operation is completed, the sheet metal is moved to the first bending station of the progressive die, and the upper punch cooperates with the bending die to perform the first bending on the product forming area of ​​the sheet metal to form a U-shaped cross-section structure; after the first bending of the sheet metal is completed, it is moved to the first empty station of the progressive die for placement; S6: Second bending of sheet metal: the sheet metal is moved to the second bending station of the progressive die, and the product forming area in the sheet metal is bent for the second time by the cooperation of the upper punch and the bending die; after the second bending of the sheet metal, it is moved to the second empty station of the progressive die for placement; S7: Sheet punching: Move the sheet to the punching station of the progressive die, use the upper punch and the punching die to complete the second blanking hole and the waist-shaped blanking hole processing, and both are formed at the same time; after completing the punching, move the sheet to the third empty station of the progressive die for placement; S8: Sheet cutting and forming: Move the sheet to the cutting station of the progressive die, and use the upper punch and the cutting die to complete the processing of the outer frame blanking holes and the inner frame blanking holes, and finally realize the blanking of the inner panel assembly of the front longitudinal beam of the automobile.

[0006] The advantages of the present invention are: 1) In the present invention, the automobile front longitudinal beam inner panel assembly adopts a one-mold two-out method when performing progressive die forming, which can double the production efficiency; in addition, in the trimming operation, the frame area on the sheet material adopts a combination of step-by-step punching and regional punching, and the middle and edge of the sheet material are punched in one process in the width direction of the sheet material, which can effectively prevent product deformation and sheet tearing caused by single-sided punching and local punching; in addition, when the automobile front longitudinal beam inner panel assembly is bent, a step-by-step bending method is adopted to avoid the product rebound caused by incomplete bending due to one-time bending, and to avoid the bending part from being torn due to excessive single bending amplitude. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0008] Figure 1 The present invention is a structural diagram of a progressive forming die for an inner panel assembly of a front longitudinal beam of an automobile.

[0009] Figure 2 It is a partial enlarged view of a progressive forming die for an inner panel assembly of a front longitudinal beam of an automobile according to the present invention.

[0010] Figure 3 The present invention is a partial view of a progressive forming die for an inner panel assembly of a front longitudinal beam of an automobile.

[0011] Figure 4 The present invention is a progressive molding material strip diagram of an automobile front longitudinal beam inner panel assembly.

[0012] Figure 5 The present invention is a process flow chart of progressive forming of an inner panel assembly of a front longitudinal beam of an automobile. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0014] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] like Figures 1 to 5The progressive forming die for the inner panel assembly of the front longitudinal beam of an automobile shown in the figure comprises a die base 1, a trimming die 2, a calendering die 3, a bending die 4, a punching die 5 and a cutting die 6.

[0016] The mold base 1 has two outlets through one mold of the sheet material; a trimming station 11, a calendering station 21, a first bending station 31, a first empty station 41, a second bending station 51, a second empty station 61, a punching station 71, a third empty station 81 and a cutting station 91 are sequentially arranged on the mold base 1 along the extension direction; the trimming mold 2 is arranged at the trimming station 11 of the mold base 1; the calendering mold 3 is arranged at the calendering station 21 of the mold base 1; the bending mold 4 has a pair and is respectively arranged at the first bending station 31 and the second bending station 41 of the mold base 1; the punching mold 5 is arranged at the punching station on the mold base 1; the cutting mold 6 is arranged at the cutting station 91 of the mold base 1.

[0017] The trimming station 11 includes a positioning trimming station 12 , a first outer contour trimming station 13 and a second outer contour trimming station 14 .

[0018] The trimming die 2 at the positioning trimming station 12 is provided with a positioning edge hole 121, a progressive hole 122 and a first blanking hole 123; the positioning edge hole 121 is located at the edge position of the trimming die 2 close to both sides; the progressive hole 122 is located on the horizontal center line of the trimming die 2; the first blanking hole 123 has a pair and is symmetrically arranged on both sides of the middle center line position of the trimming die 2.

[0019] The trimming die at the first outer contour trimming station 13 is provided with a first edge trimming hole 131, a first intermediate trimming hole 132 and a first main trimming hole 133; the first edge trimming hole 131 is arranged on the trimming die 2 near the edge position; the first intermediate trimming hole 132 is arranged at the centerline position of the trimming die 2, and the sheet metal cutting area of ​​the first intermediate trimming hole 132 is connected to the end of the sheet metal cutting area of ​​one of the first blanking holes 123; the first main trimming hole 133 is arranged at the edge position of the trimming die 2 near the other side, and the sheet metal cutting area of ​​the first main trimming hole 133 is connected to the sheet metal cutting area of ​​the other first blanking hole 123.

[0020] The trimming die at the second outer contour trimming station 14 is provided with a second intermediate trimming hole 141, a second main trimming hole 142 and a second edge trimming hole 143; the second intermediate trimming hole 141 is arranged at the centerline position of the trimming die 2, and the sheet metal cutting area of ​​the second intermediate trimming hole 141 is connected with the end of the sheet metal cutting area of ​​one of the first blanking holes 123; the second main trimming hole 142 is arranged at a position close to the edge of one side of the trimming die 2, and the sheet metal cutting area of ​​the second main trimming hole 142 is connected with the area after the sheet metal cutting of the first edge trimming hole 131 and the first intermediate trimming hole 132; the second edge trimming hole 143 is arranged on the trimming die 2 near the edge position.

[0021] The calendering die at the calendering station 21 is provided with calendering grooves 22 on both sides of the center line of the die base 1 .

[0022] The bending mold 4 at the first bending station 31 and the bending mold 4 at the second bending station 51 are both provided with placement grooves corresponding to the calendering grooves, and both sides of the bending mold 4 at the first bending station 31 and both sides of the bending mold 4 at the second bending station 51 are provided with side cavities for accommodating the bending of the sheet metal.

[0023] The first empty workstation 41 and the second empty workstation 61 are respectively provided with a first sheet material placement seat 42 for placing the sheet material after the first bending and a second sheet material placement seat 62 for placing the sheet material after the second bending. The first sheet material placement seat 42 is provided with a first limiting groove for accommodating the embedding of the sheet material flange after the first bending; the second sheet material placement seat 62 is provided with a second limiting groove for accommodating the embedding of the sheet material flange after the second bending.

[0024] The punching die 5 at the punching station 71 is provided with a second blanking hole 72 and a waist-shaped blanking hole 73 ; the second blanking hole 72 and the waist-shaped blanking hole 73 are both in a pair and are symmetrically arranged on both sides of the midline position of the punching die 5 .

[0025] The third empty station 81 is provided with a cavity for accommodating the punched sheet material.

[0026] The cutting mold 6 at the cutting station 91 is provided with an outer frame blanking hole 92 and an inner frame blanking hole 93; the outer frame blanking hole 92 has a pair and is respectively arranged at the edge position of the outer side of the cutting mold 6; the inner frame blanking hole 93 is arranged at the center line position of the cutting mold 6.

[0027] An upper punch is correspondingly arranged at each station on the mold base 1, and a punch is correspondingly arranged at each station on the upper punch.

[0028] A forming process for an inner panel assembly of a front longitudinal beam of an automobile, the specific forming process is as follows: S1: Sheet positioning and trimming: Place the sheet from the feed port into a one-die-two-outlet progressive die; at the positioning and trimming station of the progressive die, use the upper punch and the trimming die to process the positioning edge hole, the progressive hole and the first blanking hole, and the three are formed simultaneously; S2: Second trimming of sheet metal: At the first outer contour trimming station of the progressive die, the first edge trimming hole, the first middle trimming hole and the first main trimming hole are formed simultaneously by using the upper punch and the trimming die; S3: The third trimming of the sheet: At the second outer contour trimming station of the progressive die; the second intermediate trimming hole, the second main trimming hole and the second edge trimming hole are processed by the upper punch and the trimming die, and the three are formed simultaneously; S4: sheet material calendering: the sheet material after the three trimming operations is moved to the calendering station of the progressive die; the upper punch and the calendering die are used to calender the concave position on the sheet material to form a calendering groove; S5: First bending of sheet metal: After the sheet metal rolling operation is completed, the sheet metal is moved to the first bending station of the progressive die, and the upper punch cooperates with the bending die to perform the first bending on the product forming area of ​​the sheet metal to form a U-shaped cross-section structure; after the first bending of the sheet metal is completed, it is moved to the first empty station of the progressive die for placement; S6: Second bending of sheet metal: the sheet metal is moved to the second bending station of the progressive die, and the product forming area in the sheet metal is bent for the second time by the cooperation of the upper punch and the bending die; after the second bending of the sheet metal, it is moved to the second empty station of the progressive die for placement; S7: Sheet punching: Move the sheet to the punching station of the progressive die, use the upper punch and the punching die to complete the second blanking hole and the waist-shaped blanking hole processing, and both are formed at the same time; after completing the punching, move the sheet to the third empty station of the progressive die for placement; S8: Sheet cutting and forming: Move the sheet to the cutting station of the progressive die, and use the upper punch and the cutting die to complete the processing of the outer frame blanking holes and the inner frame blanking holes, and finally realize the blanking of the inner panel assembly of the front longitudinal beam of the automobile.

[0029] Those skilled in the art should understand that the present invention is not limited to the above-mentioned embodiments. The above-mentioned embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and improvements, and these changes and improvements shall all fall within the scope of the present invention claimed for protection.

Claims

1. A progressive forming die for an inner panel assembly of a front longitudinal beam of an automobile, characterized in that: Including mold base, trimming mold, calendering mold, bending mold, punching mold and cutting mold; The mold base has two exits through one mold of the sheet material; the mold base is provided with a trimming station, a calendering station, a first bending station, a first empty station, a second bending station, a second empty station, a punching station, a third empty station and a cutting station in sequence along the extension direction; the trimming mold is arranged at the trimming station of the mold base; the calendering mold is arranged at the calendering station of the mold base; the bending mold has a pair and is respectively arranged at the first bending station and the second bending station of the mold base; the punching mold is arranged at the punching station on the mold base; the cutting mold is arranged at the cutting station of the mold base; The trimming stations include a positioning trimming station, a first outer contour trimming station, and a second outer contour trimming station; The trimming die at the positioning trimming station is provided with a positioning edge hole, a progressive hole and a first blanking hole; the positioning edge hole is located at the edge position of the trimming die close to both sides; the progressive hole is located at the horizontal center line position of the trimming die; the first blanking hole has a pair and is symmetrically arranged on both sides of the middle center line position of the trimming die; The trimming die at the first outer contour trimming station is provided with a first edge trimming hole, a first intermediate trimming hole and a first main trimming hole; the first edge trimming hole is provided at a position close to the edge of the trimming die; the first intermediate trimming hole is provided at a midline position of the trimming die, and a sheet material cutting area of ​​the first intermediate trimming hole is connected to an end of a sheet material cutting area of ​​one of the first blanking holes; the first main trimming hole is provided at a position close to the edge of the other side of the trimming die, and a sheet material cutting area of ​​the first main trimming hole is connected to a sheet material cutting area of ​​another first blanking hole; The trimming die at the second outer contour trimming station is provided with a second intermediate trimming hole, a second main trimming hole and a second edge trimming hole; the second intermediate trimming hole is arranged at the center line of the trimming die, and the sheet material cutting area of ​​the second intermediate trimming hole is connected with the end of the sheet material cutting area of ​​one of the first blanking holes; the second main trimming hole is arranged at a position close to the edge of one side of the trimming die, and the sheet material cutting area of ​​the second main trimming hole is connected with the area after the sheet material of the first edge trimming hole and the first intermediate trimming hole is cut; the second edge trimming hole is arranged at a position close to the edge of the trimming die; The calendering die at the calendering station is provided with calendering grooves on both sides of the center line of the die base; The bending mold at the first bending station and the bending mold at the second bending station are both provided with placement grooves corresponding to the calendering grooves, and both sides of the bending mold at the first bending station and both sides of the bending mold at the second bending station are provided with side cavities for accommodating the bending of the sheet material; The first empty station and the second empty station are respectively provided with a first sheet material placement seat after the sheet material has completed the first bending and a second sheet material placement seat after the sheet material has completed the second bending, and the first sheet material placement seat is provided with a first limiting card groove for accommodating the sheet material flange after the first bending; the second sheet material placement seat is provided with a second limiting card groove for accommodating the sheet material flange after the second bending; The punching die at the punching station is provided with a second blanking hole and a waist-shaped blanking hole; the second blanking hole and the waist-shaped blanking hole each have a pair and are symmetrically arranged on both sides of the midline position of the punching die; The third empty station is provided with a cavity for accommodating the punched sheet material; The cutting mold at the cutting station is provided with an outer frame blanking hole and an inner frame blanking hole; the outer frame blanking hole has a pair and is respectively arranged at the edge position of the outer side of the cutting mold; the inner frame blanking hole is arranged at the center line position of the cutting mold; An upper punching die is correspondingly arranged at each station on the mold base, and a punch is correspondingly arranged at each station on the upper punching die.

2. A forming process for an inner panel assembly of a front longitudinal beam of an automobile, characterized in that: The specific molding process is as follows: S1: Sheet positioning and trimming: Place the sheet from the feed port into a one-die-two-outlet progressive die; at the positioning and trimming station of the progressive die, use the upper punch and the trimming die to process the positioning edge hole, the progressive hole and the first blanking hole, and the three are formed simultaneously; S2: Second trimming of sheet metal: At the first outer contour trimming station of the progressive die, the first edge trimming hole, the first middle trimming hole and the first main trimming hole are formed simultaneously by using the upper punch and the trimming die; S3: The third trimming of the sheet: At the second outer contour trimming station of the progressive die; the second intermediate trimming hole, the second main trimming hole and the second edge trimming hole are processed by the upper punch and the trimming die, and the three are formed simultaneously; S4: sheet material calendering: the sheet material after the three trimming operations is moved to the calendering station of the progressive die; the upper punch and the calendering die are used to calender the concave position on the sheet material to form a calendering groove; S5: First bending of sheet metal: After the sheet metal rolling operation is completed, the sheet metal is moved to the first bending station of the progressive die, and the upper punch cooperates with the bending die to perform the first bending on the product forming area of ​​the sheet metal to form a U-shaped cross-section structure; after the first bending of the sheet metal is completed, it is moved to the first empty station of the progressive die for placement; S6: Second bending of sheet metal: the sheet metal is moved to the second bending station of the progressive die, and the product forming area in the sheet metal is bent for the second time by the cooperation of the upper punch and the bending die; after the second bending of the sheet metal, it is moved to the second empty station of the progressive die for placement; S7: Sheet punching: Move the sheet to the punching station of the progressive die, use the upper punch and the punching die to complete the second blanking hole and the waist-shaped blanking hole processing, and both are formed at the same time; after completing the punching, move the sheet to the third empty station of the progressive die for placement; S8: Sheet cutting and forming: Move the sheet to the cutting station of the progressive die, and use the upper punch and the cutting die to complete the processing of the outer frame blanking holes and the inner frame blanking holes, and finally realize the blanking of the inner panel assembly of the front longitudinal beam of the automobile.

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