CN215706145U - Automobile anti-collision beam production line - Google Patents

Abstract

The utility model relates to the technical field of automobiles, in particular to an automobile anti-collision beam production line which is used for producing an automobile anti-collision beam with a B-shaped section. The automobile anti-collision beam comprises a first surface, a first arch part and a second arch part. The first arch portion includes a first outer wall surface and a first inner wall surface, and the second arch portion includes a second outer wall surface and a second inner wall surface. The automobile anti-collision beam production line comprises stamping equipment, cutting equipment and cutting equipment. The stamping equipment is used for stamping the raw material plate, four strip stamping holes are formed in a steel strip of the stamping equipment, and the four strip through holes punched in the raw material plate corresponding to the four strip through holes are located in a first inner wall face and a second inner wall face at two ends of the automobile anti-collision beam respectively. The cutting equipment is used for cutting off the adjacent automobile anti-collision beams after molding and cutting one end of each of the four strip-shaped through holes. The cutting equipment cuts on the first face, the first outer wall face and the second outer wall face at the automobile anticollision roof beam both ends after the shaping and can form both ends inclined plane.

Description

Automobile anti-collision beam production line

Technical Field

The utility model relates to the technical field of automobiles, in particular to an automobile anti-collision beam production line.

Background

An automobile impact beam is a device that absorbs impact energy when a vehicle is impacted. When designing the automobile anti-collision beam, the two ends of the automobile anti-collision beam are often designed into inclined planes in consideration of the space and the requirements on the assembly of accessories, but the inclined plane cutting of the automobile anti-collision beam needs a more complex process flow.

The 'B' -shaped cross-section automobile anti-collision beam has inherent advantages in collision performance compared with the traditional 'D' -shaped cross-section automobile anti-collision beam, but the cutting process is very complex. The B-shaped cross-section automobile anti-collision beam is provided with two cavities, and the process can not be finished in one step no matter a die trimming process or a laser cutting process is used, so that a multi-step process is required. Specifically, two outer L-shaped pieces need to be removed by a laser cutting process, and then inner L-shaped pieces need to be cut off by a punch and a die, so that equipment investment and labor cost are increased by two steps of processes, and the processing cost of a final product is increased, which results in insufficient market competitiveness.

Therefore, there is a need for an automobile impact beam production line to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an automobile anti-collision beam production line, which can simplify the manufacturing process, reduce the equipment investment and the labor investment and improve the economic benefit.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides an automobile anti-collision beam production line for the production cross-section is the automobile anti-collision beam of B type, automobile anti-collision beam includes:

the first arched part comprises a first outer wall surface and a first inner wall surface which are oppositely arranged, and the second arched part comprises a second outer wall surface and a second inner wall surface which are oppositely arranged;

the automobile anti-collision beam production line comprises:

the stamping equipment is used for stamping a raw material plate for manufacturing the automobile anti-collision beam, four strip-shaped stamping holes are formed in a steel strip of the stamping equipment, and the four strip-shaped stamping holes are respectively positioned on the first inner wall surface and the second inner wall surface of two ends of the same automobile anti-collision beam corresponding to the four strip-shaped through holes stamped in the raw material plate;

the cutting equipment is used for cutting off the adjacent formed automobile anti-collision beams, and one end of each of the four strip-shaped through holes is opened;

the cutting equipment is after the shaping the first face at the both ends of car anticollision roof beam first outer wall with the cutting on the second outer wall, with four the strip through-hole forms jointly the both ends inclined plane of car anticollision roof beam.

Optionally, the vehicle bumper comprises a roller bending device, wherein the roller bending device is used for rolling the vehicle bumper beam so as to bend the vehicle bumper beam along the length direction.

Optionally, the roll bending apparatus includes a bending die for bending the automobile impact beam in a length direction.

Optionally, the first face and the first arch portion enclose a first cavity, and the roll bending apparatus further includes a first guide mandrel located downstream of the bending die, the first guide mandrel being configured to support the first cavity;

the first surface and the second arched part are enclosed to form a second cavity, the roll bending equipment further comprises a second guide mandrel located at the downstream of the bending die, and the second guide mandrel is used for supporting the second cavity.

Optionally, a first inclined surface and a second inclined surface are oppositely arranged at one end of the first guide mandrel, which is firstly contacted with the automobile anti-collision beam, and the first inclined surface and the second inclined surface are respectively used for guiding and stretching two curved wall surfaces of the first cavity in a rolling manner;

the second guide mandrel is firstly contacted with one end of the automobile anti-collision beam, a third inclined surface and a fourth inclined surface are oppositely arranged, and the third inclined surface and the fourth inclined surface are respectively used for guiding and propping open two curved wall surfaces of the second cavity in a rolling mode.

Optionally, the first guide mandrel further comprises a first bottom surface and a first top surface which are oppositely arranged, the first bottom surface is connected to the first inclined surface, the first top surface is connected to the second inclined surface, and the first bottom surface and the first top surface are used for supporting two wall surfaces of the first cavity which are rolled and bent;

the second guide mandrel further comprises a second bottom surface and a second top surface which are oppositely arranged, the second bottom surface is connected to the third inclined surface, the second top surface is connected to the fourth inclined surface, and the second bottom surface and the second top surface are used for supporting two wall surfaces of the second cavity which are bent in a rolling mode.

Optionally, the roll bending apparatus further comprises a first following mandrel downstream of the first guiding mandrel for supporting the first mould cavity;

the roll bending apparatus further comprises a second following mandrel downstream of the second guiding mandrel for supporting the second mould cavity.

Optionally, a plurality of first following mandrels are arranged at intervals and form a curved arrangement shape together with the first guide mandrel;

the second following mandrels are arranged in a plurality of intervals and form a curve arrangement shape together with the second guide mandrel.

Optionally, the first guiding mandrel and the first following mandrel are connected in series by a first tie rod;

the second guiding mandrel and the second following mandrel are connected in series through a second pull rod.

Optionally, a plurality of cutting punching holes are arranged on the steel strip, and the cutting punching holes are used for cutting adjacent automobile anti-collision beams.

The utility model has the beneficial effects that:

the utility model provides an automobile anti-collision beam production line which is used for producing an automobile anti-collision beam with a B-shaped section. Wherein, car anticollision roof beam includes first face and interval and sets up first arch portion and the second arch portion on first face. The first arch portion includes first outer wall surface and first internal wall surface that relative setting, and the second arch portion includes second outer wall surface and second internal wall surface that relative setting. The automobile anti-collision beam production line comprises stamping equipment, cutting equipment and cutting equipment. The stamping equipment is used for stamping raw material plates for manufacturing the automobile anti-collision beam, four strip-shaped stamping holes are formed in a steel strip of the stamping equipment, and the four strip-shaped through holes punched in the raw material plates corresponding to the four strip-shaped through holes are located in a first inner wall face and a second inner wall face of two ends of the same automobile anti-collision beam respectively. The cutting equipment is used for cutting off the adjacent automobile anti-collision beams after molding, and one end of each of the four strip-shaped through holes is opened. The cutting equipment cuts on the first face, the first outer wall face and the second outer wall face at the both ends of the car anticollision roof beam after the shaping, forms the both ends inclined plane of car anticollision roof beam with four strip through-holes jointly.

This automobile anticollision roof beam production line carries out the punching press through stamping equipment to the raw materials panel of automobile anticollision roof beam, and rethread cutting equipment cuts off adjacent automobile anticollision roof beam after the shaping, forms an automobile anticollision roof beam, cuts through cutting equipment to the both ends of each automobile anticollision roof beam at last, forms the inclined plane.

This automobile anticollision roof beam production line has optimized the punching press hole on stamping equipment's the steel band, set up four strip punching press holes promptly, four strip punching press holes correspond four strip through-holes that punch out on raw materials panel, four strip through-holes are after the shaping, lie in respectively on the first internal face and the second internal face at same automobile anticollision roof beam both ends, first strip through-hole and second strip through-hole lie in respectively on the first internal face and the second internal face of automobile anticollision roof beam one end promptly, third strip through-hole and fourth strip through-hole lie in respectively on the first internal face and the second internal face of automobile anticollision roof beam other end. The cutting equipment can cut one end of each strip-shaped through hole when the adjacent automobile anti-collision beam after being formed is cut off, namely, the two ends of one automobile anti-collision beam are all cut off, and the four strip-shaped through holes are strip-shaped openings. The cutting equipment only needs to cut on the outer wall of first face, first outer wall and the second at the both ends of car anticollision roof beam, can form the both ends inclined plane of car anticollision roof beam with four strip through-holes jointly. Compared with the existing production process, the production line of the automobile anti-collision beam omits the step of cutting off the inner 'n' -shaped sheet by using a punch and a die, not only can the manufacturing process be simplified, but also the equipment investment and the labor investment can be reduced, and the economic benefit is improved.

Drawings

FIG. 1 is a structural schematic diagram of a perspective view of an automotive impact beam provided in accordance with an embodiment of the present invention;

FIG. 2 is a structural schematic diagram of another perspective view of an automotive impact beam provided in accordance with an embodiment of the present invention;

FIG. 3 is a schematic structural view of a steel strip of a stamping apparatus according to an embodiment of the present invention;

fig. 4 is a front view of a first guide mandrel of a roll bending apparatus provided by an embodiment of the present invention;

FIG. 5 is a left side view of a first guide mandrel of a roll bending apparatus provided by an embodiment of the present invention;

fig. 6 is a front view of a second guide mandrel of the roll bending apparatus provided by the embodiment of the present invention;

fig. 7 is a left side view of a second guide mandrel of a roll bending apparatus provided by an embodiment of the present invention.

In the figure:

1. an automotive impact beam; 11. a first side;

12. a first arch portion; 121. a first outer wall surface; 122. a first inner wall surface; 1221. a first stamped opening; 123. a first cavity;

13. a second arched portion; 131. a second outer wall surface; 132. a second inner wall surface; 1321. a second stamped opening; 133. a second cavity;

2. a first guide mandrel; 21. a first inclined surface; 22. a second inclined surface; 23. a first bottom surface; 24. a first top surface; 25. a first guide through-hole;

3. a second guide mandrel; 31. a third inclined surface; 32. a fourth inclined surface; 33. a second bottom surface; 34. a second top surface; 35. a second guide through hole;

4. a steel belt; 41. a first strip-shaped punched hole; 42. a second strip-shaped punched hole; 43. a third strip punch hole; 44. a fourth strip is punched.

Detailed Description

The technical scheme of the utility model is further explained by combining the attached drawings and the embodiment. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The "B" section-shaped automobile impact beam 1 has inherent advantages in terms of impact performance over the conventional "D" section-shaped automobile impact beam 1, but is very complicated in terms of cutting process. The B-shaped automobile anti-collision beam 1 is provided with two cavities, and the process can not be finished in one step no matter a die trimming process or a laser cutting process is used, so that a multi-step process is required. Specifically, two L-shaped pieces outside the plastic film are removed by adopting a laser cutting process, then the inner L-shaped pieces are cut off by adopting a punch and a die, equipment investment and labor cost are increased due to the two-step process, and finally the processing cost of the product is increased, so that the market competitiveness is insufficient. Accordingly, the present invention provides an automobile impact beam production line to solve the above-mentioned problems.

Specifically, this automobile anticollision roof beam production line is used for producing the automobile anticollision roof beam 1 that the cross-section is the B type. As shown in fig. 1 to 2, the impact beam 1 for a vehicle includes a first surface 11 and a first arch portion 12 and a second arch portion 13 which are provided at intervals on the first surface 11. Alternatively, the first surface 11 and the first arch 12 enclose the first cavity 123, and the first surface 11 and the second arch 13 enclose the second cavity 133. The first arch portion 12 includes a first outer wall surface 121 and a first inner wall surface 122 that are oppositely disposed, and the second arch portion 13 includes a second outer wall surface 131 and a second inner wall surface 132 that are oppositely disposed.

The automobile anti-collision beam production line comprises stamping equipment, rolling forming equipment, roll bending equipment, cutting equipment and cutting equipment. Wherein, stamping equipment is used for the raw materials panel of punching press preparation car anticollision roof beam 1. The roll forming equipment is used for rolling the raw material plate into a B-shaped section. The roll bending apparatus is used for rolling the automobile impact beam 1 so that the automobile impact beam 1 is bent in the length direction. The cutting equipment is used for cutting off the adjacent formed automobile anti-collision beam 1, and one end of each strip-shaped through hole is opened while cutting off. The cutting equipment cuts on the first face 11, the first outer wall surface 121 and the second outer wall surface 131 at the two ends of the formed automobile anti-collision beam 1, and forms the inclined faces at the two ends of the automobile anti-collision beam 1 together with the four strip-shaped through holes.

As shown in fig. 3, the automobile anti-collision beam production line optimizes punching holes on a steel strip 4 of a punching device, wherein the punching holes comprise strip punching holes, and a group of strip punching holes comprise four strip punching holes, namely a first strip punching hole 41 and a second strip punching hole 42 which are symmetrically arranged along the central line of the steel strip, and a third strip punching hole 43 and a fourth strip punching hole 44 which are symmetrically arranged along the central line of the steel strip. Optionally, a plurality of sets of strip-shaped punched holes are arranged on the steel strip 4. The four strip-shaped punched holes of each group correspond to four strip-shaped through holes punched on a raw material plate, the four strip-shaped through holes are respectively positioned on a first inner wall surface 122 and a second inner wall surface 132 at two ends of the same automobile anti-collision beam 1 after the automobile anti-collision beam 1 is formed, namely the first strip-shaped through holes and the second strip-shaped through holes are respectively positioned on the first inner wall surface 122 and the second inner wall surface 132 at one end of the automobile anti-collision beam 1, and the third strip-shaped through holes and the fourth strip-shaped through holes are respectively positioned on the first inner wall surface 122 and the second inner wall surface 132 at the other end of the automobile anti-collision beam 1. Optionally, punching the hole in the steel strip further comprises cutting the punched hole. The steel strip 4 is provided with a cutting area, and the cutting area is internally provided with a plurality of cutting punching holes which are used for preparing subsequent cutting equipment to cut the adjacent automobile anti-collision beams 1.

As shown in fig. 3, one end of each of the four strip-shaped punched holes is located in the cutting region, that is, one side end of each of the first strip-shaped punched hole 41 and the second strip-shaped punched hole 42 is located in one cutting region, and one side end of each of the third strip-shaped punched hole 43 and the fourth strip-shaped punched hole 44 is located in a cutting region adjacent to the cutting region.

Due to the arrangement, when the adjacent automobile anti-collision beam 1 after being formed is cut off by the cutting equipment, namely the cutting area is removed, one end of each strip-shaped through hole can be cut, namely two ends of one automobile anti-collision beam 1 are all cut off, and the four strip-shaped through holes are all strip-shaped openings. Namely a first punched opening 1221, a second punched opening 1321, a third punched opening and a fourth punched opening.

The cutting device only needs to cut the first surface 11, the first outer wall surface 121 and the second outer wall surface 131 at the two ends of the automobile anti-collision beam 1, and the cutting device and the first punching opening 1221, the second punching opening 1321, the third punching opening and the fourth punching opening together form the two-end inclined surfaces of the automobile anti-collision beam 1. Optionally, the cutting device is a laser cutting device.

Compared with the existing production process, the production line of the automobile anti-collision beam provided by the embodiment omits the step of cutting off the inner 'n' -shaped sheets by using a punch and a die, not only can the manufacturing process be simplified, but also the equipment investment and the manual investment can be reduced, and the economic benefit is improved.

Optionally, the roll bending apparatus includes a bending die for bending the automobile impact beam 1 in a length direction. In the roll bending process, the first surface 11 of the automobile impact beam 1 may be stretched, and the top surface of the first cavity 123 and the top surface of the second cavity 133, which are opposite to the first surface 11, may be compressed. The first face 11 is easily dented during the drawing process, and the top surface of the first cavity 123 and the top surface of the second cavity 133 are also easily dented during the compression process. The first cavity 123 and the second cavity 133 need to be expanded subsequently, but due to the existence of the first punching opening 1221, the second punching opening 1321, the third punching opening, and the fourth punching opening, the sheet may be broken along a certain punching opening during the expanding process. To prevent this problem, the roll bending apparatus optionally further comprises a first guiding mandrel 2 located downstream of the bending die, the first guiding mandrel 2 being adapted to support the first cavity 123. The first guide mandrel 2 is provided with a first inclined surface 21 and a second inclined surface 22 at one end which contacts the automobile anti-collision beam 1, and the first inclined surface 21 and the second inclined surface 22 are used for guiding and spreading two curved wall surfaces of the first cavity 123 through rolling. Optionally, the first guiding mandrel 2 further comprises a first bottom surface 23 and a first top surface 24 which are oppositely arranged, the first bottom surface 23 is connected to the first inclined surface 21, the first top surface 24 is connected to the second inclined surface 22, the first bottom surface 23 is located downstream of the first inclined surface 21, and the first top surface 24 is located downstream of the second inclined surface 22. The first bottom surface 23 and the first top surface 24 are used for continuously supporting the two rolled and bent wall surfaces of the first cavity 123 which is already spread. In order to further improve the support capacity, the roll bending apparatus optionally further comprises a first following mandrel downstream of the first guiding mandrel 2 for supporting the first mould cavity 123. Optionally, the first following mandrels are arranged in a plurality of intervals, the first following mandrels and the first guide mandrel 2 jointly form a curve arrangement shape, and the curvature of the arrangement state is consistent with that of the automobile anti-collision beam 1. Optionally, the first guiding mandrel 2 is connected in series with the first following mandrel by a first tie rod. The first guide mandrel 2 is provided with a first guide through hole 25, each first following mandrel is also provided with a first following through hole, and the first pull rod penetrates through the first guide through hole 25 and the first following through holes.

Likewise, the roll bending apparatus further comprises a second guiding mandrel 3 located downstream of the bending die, the second guiding mandrel 3 being adapted to support a second cavity 133. The end, which contacts the automobile anti-collision beam 1 first, of the second guide mandrel 3 is provided with a third inclined surface 31 and a fourth inclined surface 32 oppositely, and the third inclined surface 31 and the fourth inclined surface 32 are used for guiding and spreading two curved wall surfaces of the second cavity 133 in a rolling manner respectively. The second guiding mandrel 3 further comprises a second bottom surface 33 and a second top surface 34 which are oppositely arranged, the second bottom surface 33 is connected to the third inclined surface 31, the second top surface 34 is connected to the fourth inclined surface 32, and the second bottom surface 33 and the second top surface 34 are used for supporting two wall surfaces of the second cavity 133 which are rolled and bent. The roll bending apparatus further comprises a second following mandrel downstream of the second guiding mandrel 3 for supporting the second cavity 133. The dabber is followed to the second is provided with a plurality ofly, and a plurality of second are followed the dabber interval and are arranged, and form curve arrangement shape with second guide dabber 3 jointly, and the crookedness of this arrangement state is unanimous with the crookedness of car anticollision roof beam 1. The second guiding mandrel 3 is connected in series with the second following mandrel by a second tie rod. The second guide mandrel 3 is provided with a second guide through hole 35, each second following mandrel is also provided with a second following through hole, and the second pull rod penetrates through the second guide through hole 35 and the second following through holes.

This automobile anticollision roof beam production line carries out the punching press to automobile anticollision roof beam 1's raw materials panel through stamping equipment, and rethread cutting equipment cuts off adjacent automobile anticollision roof beam 1 after the shaping, forms automobile anticollision roof beam 1 one, cuts processing through cutting equipment to each automobile anticollision roof beam 1's both ends at last, forms the inclined plane.

The automobile anti-collision beam production line provided by the embodiment can realize the simplification of the cutting step by optimizing the punching holes on the steel strip 4 of the punching equipment. And the roll bending process of the automobile anti-collision beam production line is correspondingly optimized, namely, the process of opening the cavity is gradually finished by arranging the guide mandrel with the inclined surface, so that the phenomenon that the opening plate is broken suddenly is avoided. Therefore, compared with the existing production process, the production line for the automobile anti-collision beam provided by the embodiment omits the step of cutting off the inner 'n' -shaped sheets by using a punch and a die, not only can ensure the product quality, but also can simplify the manufacturing process, reduce the equipment investment and the manual investment and improve the economic benefit.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. The utility model provides an automobile anti-collision beam production line which characterized in that for producing automobile anti-collision beam (1) that the cross-section is the B type, automobile anti-collision beam (1) includes:

the device comprises a first surface (11), and a first arched part (12) and a second arched part (13) which are arranged on the first surface (11) at intervals, wherein the first arched part (12) comprises a first outer wall surface (121) and a first inner wall surface (122) which are oppositely arranged, and the second arched part (13) comprises a second outer wall surface (131) and a second inner wall surface (132) which are oppositely arranged;

the automobile anti-collision beam production line comprises:

the stamping equipment is used for stamping a raw material plate for manufacturing the automobile anti-collision beam (1), four strip-shaped stamping holes are formed in a steel strip (4) of the stamping equipment, and the four strip-shaped stamping holes are respectively located on the first inner wall surface (122) and the second inner wall surface (132) of the two ends of the same automobile anti-collision beam (1) corresponding to four strip-shaped through holes stamped in the raw material plate;

the cutting equipment is used for cutting off the adjacent formed automobile anti-collision beam (1), and one end of each of the four strip-shaped through holes is opened;

the automobile anti-collision beam comprises a cutting device, wherein the cutting device is used for cutting the first face (11), the first outer wall face (121) and the second outer wall face (131) at two ends of the automobile anti-collision beam (1) after forming, and the cutting device and the four strip-shaped through holes jointly form inclined faces at two ends of the automobile anti-collision beam (1).

2. The automotive impact beam production line as claimed in claim 1, further comprising a roll bending apparatus for rolling the automotive impact beam (1) to bend the automotive impact beam (1) in a length direction.

3. The automotive impact beam production line according to claim 2, characterized in that said roll bending apparatus comprises a bending die for bending said automotive impact beam (1) in a length direction.

4. A production line for automobile impact beams according to claim 3, characterized in that said first face (11) and said first arched portion (12) enclose a first cavity (123), said roll bending apparatus further comprising a first guiding mandrel (2) located downstream of said bending die, said first guiding mandrel (2) being adapted to support said first cavity (123);

the first face (11) and the second arched portion (13) enclose a second cavity (133), the roll bending apparatus further comprising a second guiding mandrel (3) downstream of the bending die, the second guiding mandrel (3) being adapted to support the second cavity (133).

5. The automobile anti-collision beam production line according to claim 4, characterized in that one end of the first guide mandrel (2) contacting the automobile anti-collision beam (1) is provided with a first inclined surface (21) and a second inclined surface (22) oppositely, and the first inclined surface (21) and the second inclined surface (22) are respectively used for guiding and expanding two wall surfaces of the first cavity (123) which are rolled and bent;

one end, which is firstly contacted with the automobile anti-collision beam (1), of the second guide mandrel (3) is provided with a third inclined surface (31) and a fourth inclined surface (32) oppositely, and the third inclined surface (31) and the fourth inclined surface (32) are respectively used for guiding and expanding two curved wall surfaces of the second cavity (133) in a rolling manner.

6. The automotive impact beam production line according to claim 5, wherein the first guide mandrel (2) further comprises a first bottom surface (23) and a first top surface (24) which are oppositely arranged, the first bottom surface (23) is connected to the first inclined surface (21), the first top surface (24) is connected to the second inclined surface (22), and the first bottom surface (23) and the first top surface (24) are used for supporting two wall surfaces of the first cavity (123) which are rolled and bent;

the second guide mandrel (3) further comprises a second bottom surface (33) and a second top surface (34) which are oppositely arranged, the second bottom surface (33) is connected to the third inclined surface (31), the second top surface (34) is connected to the fourth inclined surface (32), and the second bottom surface (33) and the second top surface (34) are used for supporting two wall surfaces of the second cavity (133) which are bent in a rolling mode.

7. The automotive impact beam production line according to claim 4, characterized in that said roll bending apparatus further comprises a first following mandrel downstream of said first guiding mandrel (2) for supporting said first cavity (123);

the roll bending apparatus further comprises a second following mandrel downstream of the second guiding mandrel (3) for supporting the second mould cavity (133).

8. The automobile anti-collision beam production line according to claim 7, characterized in that a plurality of first following mandrels are arranged, are arranged at intervals and form a curve arrangement shape together with the first guide mandrel (2);

the second following mandrels are arranged in a plurality of numbers, are arranged at intervals and form a curve arrangement shape together with the second guide mandrel (3).

9. Automobile impact beam production line according to claim 7, characterized in that said first guiding mandrel (2) and said first following mandrel are connected in series by a first tie rod;

the second guiding mandrel (3) and the second following mandrel are connected in series through a second pull rod.

10. Automobile impact beam production line according to any one of claims 1 to 9, characterized in that said steel strip (4) is provided with a plurality of cut-out punched holes for cutting out adjacent automobile impact beams (1).

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