CN113275461B

CN113275461B - Automobile cross beam connecting piece and machining process thereof, drawing die and automobile

Info

Publication number: CN113275461B
Application number: CN202110494659.7A
Authority: CN
Inventors: 陈世涛; 王海玲; 高双明; 阮林凡; 丁文军; 王震
Original assignee: Anhui Jianghuai Automobile Group Corp
Current assignee: Anhui Jianghuai Automobile Group Corp
Priority date: 2021-05-06
Filing date: 2021-05-06
Publication date: 2022-06-14
Anticipated expiration: 2041-05-06
Also published as: CN113275461A

Abstract

The invention discloses an automobile beam connecting piece and a machining process thereof, a drawing die and an automobile, wherein the drawing die comprises an upper die base, a lower die base and a blank holder, two male dies are arranged on the lower die base at intervals, the blank holder is arranged on the lower die base and comprises a blank holder body, the blank holder body is provided with two through holes, and the two through holes are respectively arranged corresponding to the two male dies and used for avoiding the two male dies. Through the two male dies arranged at intervals, in the drawing forming step of the machining process of the automobile beam connecting piece, only the areas of the blank forming the convex parts at the two ends are drawn and formed, and meanwhile, through the two through holes formed in the blank holder body, the middle connecting parts of the two through holes can press the blank to form the position of the middle concave surface, so that the wrinkling of the middle concave surface is avoided, and the attractiveness and quality of the manufactured automobile beam connecting piece are ensured.

Description

Automobile cross beam connecting piece and machining process thereof, drawing die and automobile

Technical Field

The invention relates to the technical field of automobile parts, in particular to an automobile beam connecting piece, a machining process thereof, a drawing die and an automobile.

Background

At present, the structural outline of an automobile beam product is approximately in an inverted 'ji' shape, the transverse section of the automobile beam product is in a 'ji' shape structure, and the process mould surface structure (please refer to fig. 1) is as follows: the main body part of the middle bulge is designed into an integral protruding part 10, and the shape of the circumferential swage surface 20 is approximately designed to be the same as the top surface of the protruding part 1.

The stamping realization process mainly comprises the following steps: firstly, drawing and forming, trimming and then flanging and shaping the peripheral flange. Because the blanks on the two sides are pressed tightly in the drawing forming process, the blank at the middle part is in a free state, and the areas forming the convex parts 10a at the two ends are firstly contacted and formed in the forming process, so that the position of the middle concave surface 10b is accumulated, and finally the middle concave surface 10b of the existing automobile beam connecting piece 100 is wrinkled and uneven in surface, thereby influencing the attractiveness and the using effect.

Disclosure of Invention

The invention mainly aims to provide an automobile cross beam connecting piece, a machining process thereof, a drawing die and an automobile, and aims to solve the problem that the automobile cross beam connecting piece manufactured by the existing machining process is easy to wrinkle.

In order to achieve the above object, the present invention provides a drawing die comprising:

an upper die holder;

the lower die base is provided with two male dies arranged at intervals; and the number of the first and second groups,

the blank holder is located the die holder, the blank holder includes the blank holder body, two via holes have been seted up to the blank holder body, two the via hole corresponds two respectively the terrace die sets up for dodge two the terrace die.

The invention also provides a processing technology of the automobile beam connecting piece,

the automobile cross beam connecting piece is provided with two opposite ends and a first side and a second side, wherein the first side and the second side are connected with the two ends, and the processing technology of the automobile cross beam connecting piece comprises the following steps:

providing a drawing die as described above;

placing a blank on a blank holder, pressing an upper die holder and the blank holder, and drawing and forming the blank by using two male dies to obtain a drawing part with two first convex parts;

punching and trimming the drawn piece to cut off the periphery waste material to obtain a trimmed piece;

shaping the middle part of the trimming piece between the two first bosses to obtain a semi-finished product with a second boss, wherein the two first bosses and the second boss form a protruding part together;

and carrying out flanging and shaping on the semi-finished product to obtain the automobile beam connecting piece.

Optionally, after the step of placing the blank on the blank holder, pressing the upper die holder and the blank holder, and then drawing and forming the blank by using two male dies to obtain a drawn part with two first protruding portions, the step of punching and trimming the drawn part to cut off the waste material of the periphery, and before the step of obtaining the trimmed part, the method further comprises the following steps:

and an anti-reverse part is arranged on the drawing piece.

Optionally, the step of providing an anti-reverse portion on the drawing member includes:

and bending the bending areas of the first sides at the two ends of the drawing piece to form a sinking platform structure, wherein the sinking platform structure forms the anti-reversion part.

Optionally, the step of punching and trimming the drawn piece to cut off the periphery waste to obtain the trimmed piece comprises the following steps:

and arranging a plurality of trimming positions along the circumferential direction of the drawing piece, and trimming the drawing piece from the trimming positions respectively to cut off the circumferential waste materials including the anti-reverse part to obtain the trimming piece.

Optionally, the shaping the middle portion of the trimming member to obtain a semi-finished product with a second protruding portion, and the step of forming the protruding portion by the two first protruding portions and the second protruding portion together includes:

and reshaping the flange surfaces and the side walls at two sides of the middle part of the trimming piece between the two first bulges along the R-angle parting lines of the two first bulges to obtain a semi-finished product with a second bulge, wherein the two first bulges and the second bulge jointly form a protrusion.

Optionally, the step of reshaping, along an R-angle parting line of the two first protrusions, both side flange faces and a side wall of a middle portion of the trimming member between the two first protrusions to obtain a semi-finished product with a second protrusion formed thereon includes:

and pressing the two first bosses and the middle part between the two first bosses, and then shaping the flange surfaces and the side walls on the two sides of the semi-finished connecting piece by using the shaping inserts to obtain a semi-finished connecting piece with second bosses.

Optionally, the step of performing flanging and shaping on the semi-finished product to obtain the automobile beam connector includes:

and taking R corner roots at two ends of the two first protruding parts as parting lines, and performing flanging and shaping on two ends of the semi-finished product to obtain the automobile beam connecting piece.

The invention further provides the automobile cross beam connecting piece which is manufactured by the processing technology of the automobile cross beam connecting piece.

The invention further relates to a motor vehicle comprising a motor vehicle cross member connection as described above.

According to the technical scheme provided by the invention, through the two male dies arranged at intervals, in the drawing forming step of the machining process of the automobile beam connecting piece, only the areas of the blank, which form the convex parts at the two ends, are drawn and formed, and meanwhile, through the two through holes formed in the blank holder body, the middle connecting parts of the two through holes can press the blank to form the position of the middle concave surface, so that the wrinkling of the middle concave surface is avoided, and the attractiveness and the quality of the manufactured automobile beam connecting piece are ensured.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a conventional manufactured cross-member connector for an automobile drawn and formed;

FIG. 2 is a schematic partial structural view of a drawing die provided by the present invention;

FIG. 3 is a schematic structural diagram of a lower die holder of the drawing die provided in FIG. 2;

FIG. 4 is a schematic diagram of a blank holder of the drawing die provided in FIG. 2;

FIG. 5 is a simplified illustration of the blank holder body in the blank holder provided in FIG. 4;

FIG. 6 is a schematic structural diagram of a drawn part in the process for machining the automobile cross beam connector provided by the invention;

FIG. 7 is a schematic structural view of a trim part of the machining process of the automobile cross beam connector provided by the invention;

FIG. 8 is a cross car beam connector made by the process for making a cross car beam connector according to the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Existing automobile cross beam connecting piece	3	Projection part
10	Projection part	31	First convex part
				10a	Raised part	32	Second convex part
10b	Middle concave surface	4	Drawing member
				20	Circumferential material pressing noodle	41	Circumferential blank
200	Drawing die	42	Anti-reverse part
				1	Lower die holder	5	Trimming member
11	Male die	51	Through hole
				2	Blank holder	52	Trimming position
21	Blank holder body	61	R angle parting line
				211	Via hole	61a	Flange face
300	Automobile beam connecting piece	62	R-angle root parting line

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

At present, the stamping realization process of the automobile beam product structure mainly comprises the following steps: firstly, drawing and forming, trimming and then flanging and shaping the peripheral flange. In the drawing forming process (see fig. 1), the peripheral blanks at the two sides are pressed, the blank at the middle part is in a free state, and in the forming process, the areas forming the convex parts 10a at the two ends are firstly in contact forming to cause material accumulation at the position of the middle concave surface 10b, and finally the middle concave surface 10b of the existing automobile beam connecting piece 100 is wrinkled and uneven in surface (not shown in the figure), so that the attractiveness and the use effect are influenced.

In view of the above, the invention provides a drawing die, which is used in the drawing forming step of the machining process of the automobile beam connecting piece. Referring to fig. 2 to 4, in an embodiment, the drawing die 200 includes an upper die base (not shown), a lower die base 1, and a blank holder 2, wherein the lower die base 1 is provided with two male dies 11 arranged at an interval, the blank holder is arranged on the lower die base 1, the blank holder 2 includes a blank holder body 21, the blank holder body 21 is provided with two through holes 211, and the two through holes 211 are arranged corresponding to the two male dies 11 to avoid the two male dies 11.

In the technical scheme provided by the invention, the lower die holder 1 comprises two male dies 11 arranged at intervals, so that in the drawing forming step of the machining process of the automobile beam connecting piece 300, only the areas of the blank forming the convex parts at the two ends are drawn and formed, and meanwhile, the middle connecting parts of the two through holes 211 can press the blank to form the position of a middle concave surface through the two through holes 211 formed in the blank holder body 21, so that the wrinkling of the middle concave surface is avoided, and the attractiveness and the quality of the manufactured automobile beam connecting piece 300 are ensured.

Based on the drawing die 200, the invention also provides a processing technology of the automobile cross beam connecting piece 300, so that the processed automobile cross beam connecting piece 300 is not easy to wrinkle and has good quality. In one embodiment, the cross-car beam connector 300 has two ends oppositely disposed and a first side and a second side connecting the two ends, wherein the machining process of the cross-car beam connector 300 comprises the following steps:

step S10, providing a drawing die 200 as above.

Step S20, placing the blank on the blank holder 2, pressing the upper die holder and the blank holder 2 together, and then drawing the blank with the two male dies 11 to obtain the drawing part 4 with the two first protrusions 31.

Referring to fig. 5, the die faces of the protruding portions at the two ends of the blank holder body 21 are designed based on the flange face 61a, such as the ab section and the ef section in the drawing; the middle concave part die surface of the blank holder body 21 is designed by taking the concave surface of the automobile beam connector 300 as a reference, such as a cd section; the inclined surfaces between the convex portions at the two ends and the concave surface in the middle of the blank holder body 21 are designed in a state close to the final cross beam connector 300 (i.e., against the drawing surface of the cross beam connector 300) without cracking, so as to reduce the shaping amount of the subsequent processes, such as the bc section and the de section.

In specific implementation, a blank is placed on the blank holder, the upper die holder is pressed with the blank holder, then the two male dies 11 respectively penetrate through the two through holes 211 of the blank holder body 21 and contact with the blank, the blank is subjected to drawing forming, the drawing part 4 with the two first protruding parts 31 is obtained, and the blank subjected to drawing forming is shown in fig. 6. Therefore, the blank holder body 21 and the upper die are matched with each other, so that the positions of the peripheral blank 41 and the middle concave surface are both pressed, and the middle concave surface part is not formed by drawing, so that the wrinkling of the middle concave surface is avoided, the drawing effect is good, and no wrinkling exists completely.

Since the profiles of the two ends of the drawn part 4 obtained after the step S20 are similar and substantially symmetrical, but the two ends are not substantially symmetrical, and the subsequent steps are not completely identical to each other, in order to prevent the subsequent processing of the drawn part 4 from making mistakes due to the inverse placement of the parts in the subsequent steps, in this embodiment, after the step S20, the method further includes the following steps: an anti-reverse portion 42 is provided at the drawing member 4.

The invention does not limit the specific arrangement condition of the anti-reflection part 42, and the anti-reflection part 42 can be arranged at one end of the drawing piece to distinguish the direction of the drawing piece 4. In order to facilitate the operation, in the embodiment, the bending regions on the first sides of the two ends of the drawing part 4 are bent to form the sinking platform structure, and the sinking platform structure forms the anti-reflection portion 42. Specifically, the sinking platform structure is of an arc-shaped characteristic and is positioned at the corner of the drawing piece 4, and the bent part is about 10 mm.

And step S30, punching and trimming the drawing piece 4 to cut off the periphery waste to obtain a trimmed piece 5.

Fig. 7 is a schematic structural view of trim piece 5 after being processed in step S30, please refer to fig. 7, in an embodiment, step S30 includes: a plurality of trimming positions 52 are provided along the circumferential direction of the drawing piece 4, and the drawing piece 4 is trimmed from the plurality of trimming positions 52, respectively, to cut away the periphery waste including the inverted preventing portion 42, resulting in the trimming piece 5. In this way, the operation is simple and the trimming effect is good by trimming the drawn piece 4 from the plurality of trimming positions 52. Meanwhile, the drawn piece 4 is punched at the same time as trimming, so that the trimmed piece 5 having the through hole 51 is obtained, and the subsequent process can be positioned through the through hole 51 to play roles of positioning and preventing reverse.

Step S40 is to shape the intermediate portion of the trim piece 5 between the two first bosses 31 to obtain a semi-finished product with the second bosses formed, and the two first bosses 31 and the second boss together form the protruding portion 3.

Fig. 8 is a schematic structural diagram of the cross-beam connector 300 after being processed in step S40, please refer to fig. 8, in an embodiment, step S40 includes: and (3) reshaping the flange surfaces 61a and the side walls of the trimming piece 5 at the middle part between the two first convex parts 31 along the R-angle parting line 61 of the two first convex parts 31 to obtain a semi-finished product with a second convex part.

In order to avoid the deformation of the formed two first protrusions 31 during the shaping process, in a specific embodiment, the step S40 includes: the two first convex parts 31 and the middle part between the two first convex parts 31 are pressed tightly, and then the flange surfaces 61a and the side walls on the two sides of the semi-finished product of the connecting piece are shaped by using the shaping inserts, so that the semi-finished product with the second convex parts is obtained.

And step S50, performing flanging and shaping on the semi-finished product to obtain the automobile beam connector 300.

Specifically, step S50 includes: and taking the root parts of the R corners at the two ends of the two first protruding parts 31 as parting lines (namely R corner root part parting lines 62), and flanging and shaping the two ends of the semi-finished product to obtain the automobile beam connecting piece 300. Since the flanging and reshaping operation is a conventional step in the machining process of the cross beam connector 300, it will not be described herein.

In the processing technology of the automobile cross beam connecting piece 300 provided by the invention, the existing one-step drawing forming is changed into two steps to obtain the protruding part 3, namely, the blank at two ends is drawn and formed to obtain two first protruding parts 31, then the middle part between the two first protruding parts 31 is shaped to obtain a second protruding part, and the protruding part 3 is formed between the two first protruding parts 31 and the second protruding part, so that the wrinkling of a middle concave area (namely, the middle part between the two first protruding parts 31) caused by the one-step drawing forming is avoided, and the product is attractive and good in quality.

The invention also provides a cross beam connector 300 of the automobile, and the cross beam connector 300 of the automobile is manufactured by the processing technology of the cross beam connector 300 of the automobile. Due to the improvement of the processing technology of the automobile cross beam connecting piece 300, the manufactured automobile cross beam connecting piece 300 has no wrinkles, and is attractive in appearance and good in quality.

Based on the automobile cross beam connector 300, the invention also provides an automobile, wherein the automobile cross beam connector 300 is arranged on the automobile, and the automobile with the automobile cross beam connector 300 is within the protection scope of the invention. The specific structure of the cross beam connector 300 refers to the above embodiments, and since the automobile adopts all the technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The machining process of the automobile cross beam connecting piece is characterized in that the automobile cross beam connecting piece is provided with two oppositely arranged ends and a first side and a second side which are connected with the two ends, and comprises the following steps:

providing a drawing die, wherein the drawing die comprises an upper die holder, a lower die holder and a blank holder, two male dies arranged at intervals are arranged on the lower die holder, the blank holder is arranged on the lower die holder, the blank holder comprises a blank holder body, two through holes are formed in the blank holder body, and the two through holes are respectively arranged corresponding to the two male dies and used for avoiding the two male dies;

punching and trimming the drawn piece to cut off the periphery waste to obtain a trimmed piece;

2. The machining process of the automobile cross beam connecting piece according to claim 1, wherein after the step of placing the blank on the blank holder, pressing the upper die holder and the blank holder, and then drawing and forming the blank by using the two male dies to obtain the drawn piece with the two first convex parts, and before the step of punching and trimming the drawn piece to cut off the periphery waste material to obtain the trimmed piece, the machining process further comprises the following steps:

and an anti-reverse part is arranged on the drawing piece.

3. The process for manufacturing a cross-member connecting member for a vehicle according to claim 2, wherein the step of providing an anti-reflection portion on the drawing member comprises:

4. The process for manufacturing a cross-member connecting member for a vehicle according to claim 2, wherein the step of punching and trimming the drawn member to cut off the periphery waste to obtain a trimmed member comprises:

and arranging a plurality of trimming positions along the circumferential direction of the drawing piece, and respectively trimming the drawing piece from the trimming positions so as to cut off the periphery waste material including the anti-reverse part to obtain the trimming piece.

5. The process for producing a cross-member connector for automobiles according to claim 1, wherein said shaping of the intermediate portion of said trim member to obtain a semi-finished product formed with a second convex portion, said two first convex portions and said second convex portion together forming a protrusion, comprises:

6. The process for producing a cross-member connecting member for automobiles according to claim 5, wherein said step of shaping both side flange faces and side walls of a middle portion between said two first projecting portions on said trim member along an R-angle parting line of said two first projecting portions to obtain a semi-finished product formed with a second projecting portion comprises:

7. The machining process of the automobile beam connector as claimed in claim 1, wherein the step of performing flanging and shaping on the semi-finished product to obtain the automobile beam connector comprises the following steps of:

8. A cross-car beam connector characterized by being manufactured by the process of cross-car beam connector according to any one of claims 1 to 7.

9. A motor vehicle comprising the cross-car beam connector of claim 8.