阅读说明：本技术 一种汽车后地板横梁一的成形模具和成形工艺 (Forming die and forming process for automobile rear floor beam I ) 是由 彭文虎 蔡锡斌 陆静易 韦毅 周林 黄锃 马思源 甘柳 龙佳泉 蔡辉 肖贵高 于 2021-08-26 设计创作，主要内容包括：本发明提供一种汽车后地板横梁一的成形模具和成形工艺,汽车后地板横梁一的成形模具用于将汽车后地板横梁一的落料件成形为初步成形件,包括相对应的上模和下模,上模能够向下移动以靠近并压紧下模,上模包括上模框架、上模压料芯和上模镶块,下模包括下模框架、下模压料芯和下模镶块；上模压料芯能够和下模压料芯压出初步成形件的顶面筋条,上模镶块能够和下模压料芯压出初步成形件的侧壁形状；上模压料芯与下模镶块压出初步成形件的翻边。采用如上结构,汽车后地板横梁一采用成形工艺制成,各结构均由上模和下模直接压出,有效避免起皱问题,最终产品质量较高；且成形工艺无需设置工艺补充和压料面,材料利用率较高,整体成本较低。(The invention provides a forming die and a forming process of a first automobile rear floor beam, wherein the forming die of the first automobile rear floor beam is used for forming a blanking part of the first automobile rear floor beam into a primary forming part and comprises an upper die and a lower die which correspond to each other, the upper die can move downwards to be close to and tightly press the lower die, the upper die comprises an upper die frame, an upper die pressing material core and an upper die insert, and the lower die comprises a lower die frame, a lower die pressing material core and a lower die insert; the upper die pressing material core and the lower die pressing material core can be used for extruding top surface ribs of the primary forming piece, and the upper die insert and the lower die pressing material core can be used for extruding the side wall shape of the primary forming piece; and the upper die material core and the lower die insert are used for extruding the flanging of the primary forming piece. By adopting the structure, the first automobile rear floor beam is manufactured by adopting a forming process, and each structure is directly extruded by the upper die and the lower die, so that the problem of wrinkling is effectively avoided, and the final product quality is higher; and the forming process does not need to be provided with process supplement and pressing surfaces, so that the material utilization rate is higher and the overall cost is lower.)

1. The utility model provides a forming die of floor crossbeam one behind car for with the blanking piece shaping of floor crossbeam one behind the car preliminary forming part (3), its characterized in that: the die comprises an upper die (1) and a lower die (2) which correspond to each other, wherein the upper die (1) can move downwards to be close to and press the lower die (2), the upper die (1) comprises an upper die frame (11), an upper die pressing core (12) and an upper die insert (13) which are arranged on the upper die frame (11), the upper die pressing core (12) can move vertically relative to the upper die frame (11), the lower die (2) comprises a lower die frame (21), and a lower die pressing core (22) and a lower die insert (23) which are arranged on the lower die frame (21), and the lower die pressing core (22) can move vertically relative to the lower die frame (21);

in the process that the upper die (1) moves downwards and presses the lower die (2), the upper die pressing material core (12) can press the blanking piece and press the top surface ribs (31) of the primary forming piece (3) together with the lower die pressing material core (22), and the upper die insert (13) can press the blanking piece and press the outer swing side wall (32) and the side wall concave bag (33) of the primary forming piece (3) together with the lower die pressing material core (22);

after the upper die (1) and the lower die (2) are compressed, the upper die pressing material core (12) and the lower die pressing material core (22) can move downwards together, so that the upper die pressing material core (12) compresses the blanking piece and presses out the flanging (34) of the primary forming piece (3) together with the lower die insert (23).

2. The forming die of the first automotive rear floor cross member according to claim 1, wherein: the upper die pressing material core (12) is provided with a first driving part (14) at the upper end, and the first driving part (14) can drive the upper die pressing material core (12) to vertically move in the upper die frame (11).

3. The forming die of the first automotive rear floor cross member according to claim 2, wherein: the first driving part (14) is a nitrogen cylinder, and the piston end of the nitrogen cylinder is connected with the upper die pressing material core (12).

4. The forming die of the first automotive rear floor cross member according to claim 1, wherein: the lower end of the lower die pressing material core (22) is provided with a second driving part (24), and the second driving part (24) can drive the lower die pressing material core (22) to vertically move in the lower die frame (21).

5. The forming die of the first automotive rear floor cross member according to claim 4, wherein: the second driving part (24) is a nitrogen cylinder, and the piston end of the nitrogen cylinder is connected with the lower die pressing material core (22).

6. The forming die of the first automotive rear floor cross member according to claim 1, wherein: the lower die (2) further comprises a plurality of positioning parts (25), and the positioning parts (25) are uniformly arranged at positions corresponding to the outer contour of the blanking part so as to position the blanking part.

7. The forming die of the first automotive rear floor cross member according to claim 1, wherein: the upper die pressing core (12) comprises an upper die pressing core insert (121), and the upper die pressing core (12) is in contact with the blanking piece through the upper die pressing core insert (121).

8. The forming die of the first automotive rear floor cross member according to claim 1, wherein: go up mould (1) with the both sides of lower mould (2) set up fixture block (15) and draw-in groove (26) that can cooperate, fixture block (15) can be gone into in draw-in groove (26), in order to right go up mould (1) with lower mould (2) carry on spacingly.

9. The forming process of the first automobile rear floor beam is characterized by comprising the following steps of: the method comprises the steps of blanking, forming, shaping and punching side punching, wherein the forming step is based on a forming die of the automobile rear floor beam I as claimed in any one of claims 1-8, and the specific steps are as follows:

blanking: cutting a plate along a blanking line, and removing parts except the blanking line to obtain a blanking piece;

forming: placing the blanking part on a lower die (2), moving an upper die (1) downwards and pressing the upper die (1) and the lower die (2), and pressing the blanking part by abutting against an upper die pressing material core (12) and pressing the upper die pressing material core and a lower die pressing material core (22) to form top surface ribs (31) of a primary forming part (3); the upper die insert (13) is abutted to press the blanking piece and presses the blanking piece and the lower die pressing core (22) to press an outer swing side wall (32) and a side wall concave bag (33) of the primary forming piece (3), and the outer swing side wall (32) swings for a preset angle compared with the final finished product; the upper die pressing core (12) compresses the blanking piece and presses a flanging (34) of the preliminary forming piece (3) together with the lower die insert (23) to obtain the preliminary forming piece (3);

shaping: pressing the swing-out side wall (32) of the primary forming piece (3) inwards by a preset angle to form a side wall (41), and pressing the side wall concave bag (33) into a side wall rib (42) to obtain a shaping piece (4);

punching the side of the punched hole: and punching holes at preset positions of the top surface and the side surface of the shaping piece (4), and finishing the forming of the automobile rear floor beam.

Technical Field

The invention relates to the technical field of automobile manufacturing, in particular to a forming die and a forming process of a first automobile rear floor beam.

Background

In the parts of the automobile, more than 60% of the integral parts are stamping parts. In the prior art, a drawing process is mostly adopted for producing stamping parts, and the drawing process is a stamping processing method for pressing a flat blank into hollow workpieces with various openings by using a drawing die or processing the manufactured hollow workpieces with openings into hollow workpieces with other shapes.

The automobile rear floor beam I is a stamping part manufactured through a drawing process, and due to the process limitation of the drawing process, process supplement and a material pressing surface need to be arranged, so that the material utilization rate of the drawing process is low, and the manufacturing cost of the automobile rear floor beam I is high.

In order to improve the material utilization rate in the manufacturing process and reduce the manufacturing cost, the first automobile rear floor beam can be manufactured through the forming process, the forming process does not need to be provided with process supplement and a material pressing surface, the material utilization rate is high, and the manufacturing cost of stamping parts can be effectively reduced. However, compared with a drawing process, the forming process is more prone to generate wrinkling, namely, during the forming process of the automobile rear floor beam I, the top surface ribs, the side walls and the side wall concave ribs are more prone to wrinkling, so that the final finished product is poor in quality and even cannot be used.

Therefore, how to provide a production method capable of preventing wrinkling in a forming process of a rear floor beam of an automobile is a technical problem to be solved urgently by those skilled in the art.

Disclosure of Invention

The invention aims to provide a production method capable of preventing wrinkling in the forming process of a rear floor beam of an automobile.

In order to solve the technical problem, the invention provides a forming die of a first automobile rear floor beam, which is used for forming a blanking part of the first automobile rear floor beam into a primary forming part and comprises an upper die and a lower die which are corresponding, wherein the upper die can move downwards to be close to and tightly press the lower die; in the process that the upper die moves downwards and presses the lower die, the upper die pressing core can press the blanking part and press top surface ribs of the primary forming part together with the lower die pressing core, and the upper die insert can press the blanking part and press an outer swing side wall and a side wall concave bag of the primary forming part together with the lower die pressing core; after the upper die and the lower die are tightly pressed, the upper die pressing material core and the lower die pressing material core can move downwards together, so that the upper die pressing material core tightly presses the blanking part and presses the lower die insert to form a flanging of the primary forming part.

By adopting the structure, the first automobile rear floor beam is manufactured by adopting a forming process, and each structure is directly extruded by the upper die and the lower die, so that the problem of wrinkling is effectively avoided, and the final product quality is higher; and the forming process does not need to be provided with process supplement and pressing surfaces, so that the material utilization rate is higher and the overall cost is lower.

Optionally, a first driving portion is arranged at the upper end of the upper die pressing core, and the first driving portion can drive the upper die pressing core to vertically move inside the upper die frame.

Optionally, the first driving portion is a nitrogen cylinder, and a piston end of the nitrogen cylinder is connected with the upper die pressing core.

Optionally, a second driving portion is disposed at a lower end of the lower mold core, and the second driving portion can drive the lower mold core to move vertically inside the lower mold frame.

Optionally, the second driving part is a nitrogen cylinder, and a piston end of the nitrogen cylinder is connected with the lower die pressing core.

Optionally, the lower die further comprises a plurality of positioning portions, and each positioning portion is uniformly arranged at a position corresponding to the outer contour of the blanking part so as to position the blanking part.

Optionally, the upper die pressing core comprises an upper die pressing core insert, and the upper die pressing core is in contact with the blanking piece through the upper die pressing core insert.

Optionally, the two sides of the upper die and the lower die are provided with a clamping block and a clamping groove which can be matched with each other, and the clamping block can be clamped into the clamping groove to limit the upper die and the lower die.

The invention also provides a forming process of the first automobile rear floor beam, which comprises the steps of blanking, forming, shaping and punching side punching, wherein the forming step is based on the forming die of the first automobile rear floor beam, and the specific steps are as follows: blanking: cutting a plate along a blanking line, and removing parts except the blanking line to obtain a blanking piece; forming: placing the blanking part on a lower die, moving an upper die downwards and pressing the upper die with the lower die, and pressing the blanking part by abutting against an upper die pressing core and pressing the blanking part and the lower die pressing core to form top surface ribs of a primary forming part; the upper die insert abuts against and presses the blanking piece and the lower die pressing core to press an outer swing side wall and a side wall concave bag of the primary forming piece, and the outer swing side wall is swung by a preset angle compared with a final finished product; the upper die pressing core presses the blanking piece tightly and presses the flanging of the preliminary forming piece together with the lower die insert to obtain the preliminary forming piece; shaping: pressing the side wall of the outer hem inwards by a preset angle to form a side wall, and then pressing the side wall concave bag into a side wall rib to obtain a shaping piece; punching the side of the punched hole: and punching holes at preset positions on the top surface and the side surface of the shaping piece, and finishing the forming of the automobile rear floor beam.

Drawings

FIG. 1 is a schematic cross-sectional view of a forming mold for a first automotive rear floor cross member according to an embodiment of the present invention, when the forming mold is not compressed;

FIG. 2 is a schematic cross-sectional view of a forming mold of the first automotive rear floor cross member of FIG. 1 during pressing;

FIG. 3 is a schematic overall perspective view of a forming mold for a first automotive rear floor cross member according to an embodiment of the present invention;

FIG. 4 is a top view of the lower die of FIG. 2;

FIG. 5 is a schematic perspective view of the lower mold of FIG. 2;

FIG. 6 is a bottom view of the upper die of FIG. 2;

FIG. 7 is a schematic perspective view of the upper mold of FIG. 2 after being inverted;

FIG. 8 is a blanking outline diagram of a sheet material in the blanking process in the forming method of the first automobile rear floor beam provided by the embodiment of the invention;

FIG. 9 is a schematic structural view of a preliminary formed member in the method of forming a first rear floor cross member for an automobile according to the embodiment of the present invention;

fig. 10 is a schematic structural view of a shaping member in a method for forming a first floor cross member of an automobile according to an embodiment of the present invention.

The reference numerals in fig. 1-10 are illustrated as follows:

1 upper die, 11 upper die frame, 12 upper die pressing material core, 121 upper die pressing material core insert, 13 upper die insert, 14 first driving part, 15 fixture block, 2 lower die, 21 lower die frame, 22 lower die pressing material core, 23 lower die insert, 24 second driving part, 25 positioning part, 26 clamping groove, 3 primary forming part, 31 top surface rib, 32 outward swinging side wall, 33 side wall concave bag, 34 flanging, 4 shaping part, 41 side wall, 42 side wall rib, 5 board material line, 6 blanking line.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 10, fig. 1 is a schematic cross-sectional structure view of a forming mold of a first automotive rear floor cross member according to an embodiment of the present invention when the forming mold is not compressed; FIG. 2 is a schematic cross-sectional view of a forming mold of the first automotive rear floor cross member of FIG. 1 during pressing; FIG. 3 is a schematic overall perspective view of a forming mold for a first automotive rear floor cross member according to an embodiment of the present invention; FIG. 4 is a top view of the lower die of FIG. 2;

FIG. 5 is a schematic perspective view of the lower mold of FIG. 2; FIG. 6 is a bottom view of the upper die of FIG. 2; FIG. 7 is a schematic perspective view of the upper mold of FIG. 2 after being inverted; FIG. 8 is a blanking outline diagram of a sheet material in the blanking process in the forming method of the first automobile rear floor beam provided by the embodiment of the invention; FIG. 9 is a schematic structural view of a preliminary formed member in the method of forming a first rear floor cross member for an automobile according to the embodiment of the present invention;

fig. 10 is a schematic structural view of a shaping member in a method for forming a first floor cross member of an automobile according to an embodiment of the present invention.

The invention provides a forming die of a first automobile rear floor beam, which is used for forming a blanking part of the first automobile rear floor beam into a primary forming part 3 and comprises an upper die 1 and a lower die 2 which are corresponding to each other, wherein the upper die 1 can move downwards to be close to and press the lower die 2, the upper die 1 comprises an upper die frame 11 and an upper die pressing core 12 and an upper die insert 13 which are arranged on the upper die frame 11, the upper die pressing core 12 can vertically move relative to the upper die frame 11, the lower die 2 comprises a lower die frame 21 and a lower die pressing core 22 and a lower die insert 23 which are arranged on the lower die frame 21, and the lower die pressing core 22 can vertically move relative to the lower die frame 21;

in the process that the upper die 1 moves downwards and presses the lower die 2, the upper die pressing core 12 can press the blanking part and press the top surface ribs 31 of the primary formed part 3 together with the lower die pressing core 22, and the upper die insert 13 can press the blanking part and press the outer swing side wall 32 and the side wall concave bag 33 of the primary formed part 3 together with the lower die pressing core 22;

after the upper die 1 and the lower die 2 are pressed, the upper die pressing core 12 and the lower die pressing core 22 can move downwards together, so that the upper die pressing core 12 presses the blanking part and presses the flanging 34 of the primary forming part 3 together with the lower die insert 23.

By adopting the structure, the first automobile rear floor beam is manufactured by adopting a forming process, and each structure is directly extruded by the upper die 1 and the lower die 2, so that the problem of wrinkling of one part of the automobile rear floor beam is effectively avoided, and the final product has high quality; and the forming process does not need to be provided with process supplement and pressing surfaces, so that the material utilization rate is higher and the overall cost is lower.

The blanking part is a plate material which is blanked by the forming process of the automobile rear floor beam I and is matched with a finished automobile rear floor beam I in shape; the primary formed part 3 is a semi-finished plate matched with the finished automobile rear floor beam I in the whole structure after blanking and forming of the forming process of the automobile rear floor beam I, and the forming step is used for the forming process of the automobile rear floor beam I, and the blanking part can be processed into the primary formed part 3.

Referring to fig. 1 to 7, an upper die pressing core 12 and an upper die insert 13 are disposed inside an upper die frame 11, a lower die pressing core 22 and a lower die insert 23 are disposed inside a lower die frame 21, and the shapes of the upper die pressing core 12, the upper die insert 13, the lower die pressing core 22 and the lower die insert 23 are all matched with the shape and the structure of a preliminary formed part 3.

Specifically, after the blanking member is placed at a predetermined position of the lower die 2, the upper die 1 moves downwards, namely, is close to the lower die 2, the upper die pressing core 12 firstly contacts with the blanking member, compresses the blanking member and is matched with the lower die pressing core 22, and the top surface ribs 31 of the primary forming member 3 are extruded;

after the top surface ribs 31 are extruded, the upper die pressing core 12 and the lower die pressing core 22 keep relatively static with the lower die 2, the upper die 1 continues to move downwards, the upper die pressing core 12 vertically moves upwards relative to the upper die 1 in the upper die frame 11, then the upper die insert 13 contacts with a blanking piece, the blanking piece is compressed and matched with the lower die pressing core 22, and an outward swinging side wall 32 and a side wall concave bag 33 of the primary forming piece 3 are extruded, at the moment, the outward swinging side wall 32 and the side wall concave bag 33 are swung outwards by a preset angle compared with a finished product of a first automobile rear floor beam, and the preset angle is selected to be 30 degrees in the embodiment;

after the outer hem side wall 32 and the side wall concave bag 33 are pressed out, the upper die 1 is completely pressed and attached to the lower die 2, the upper die pressing core 12 and the lower die pressing core 22 continue to keep relatively static and move vertically downwards together, the upper die pressing core 12 can be matched with the lower die insert 23 in the process, the flanging 34 of the preliminary forming piece 3 is pressed out, and the preliminary forming piece 3 is manufactured.

In the process, because each part structure of the preliminary forming piece 3 is directly extruded by the upper die 1 and the lower die 2, the wrinkling phenomenon of the preliminary forming piece 3 can be effectively avoided, and the quality of a finished floor beam after the automobile is effectively improved.

The upper molding core 12 of this embodiment is provided at its upper end with a first driving portion 14, and the first driving portion 14 can drive the upper molding core 12 to move up and down inside the upper mold frame 11. Specifically, the first driving portion 14 is a nitrogen cylinder, and a piston end of the nitrogen cylinder is connected to the upper die pressing core 12.

The first driving portion 14 can control the upper die pressing core 12 to move in an extending state in the pressing process of the upper die 1 and the lower die 2, move vertically upwards relative to the upper die 1 after the top surface ribs 31 are pressed out, keep static with the lower die pressing core 22, continue to drive the upper die pressing core 12 to move vertically downwards after the upper die 1 and the lower die 2 are completely pressed and attached, and press out the flanging 34 of the primary forming part 3 by matching with the lower die insert 23.

In this embodiment, the lower end of the lower mold core 22 is provided with a second driving portion 24, and the second driving portion 24 can drive the lower mold core 22 to move up and down inside the lower mold frame 21. Specifically, the second driving portion 24 is a nitrogen cylinder, and a piston end of the nitrogen cylinder is connected to the lower die material pressing core 22.

The second driving portion 24 can control the lower die pressing core 22 to keep an extending state in the pressing process of the upper die 1 and the lower die 2, and after the upper die 1 and the lower die 2 are completely pressed and attached, the lower die pressing core 12 and the upper die press core 12 keep relatively static and move vertically and downwards together, so that the upper die pressing core 12 can be matched with the lower die insert 23 to press out the flanging 34 of the primary formed part 3.

It is understood that the first driving part 14 and the second driving part 24 may be other driving structures besides the nitrogen cylinder, such as an oil cylinder, a motor, etc., and the present invention is not limited thereto as long as the two parts can achieve the above functions.

In addition to the above-described manner of fixing and connecting the upper die material core 12 and the lower die material core 22 only by the first driving portion 14 and the second driving portion 24, the upper die material core 12 and the lower die material core 22 may be fixed and connected to the upper die frame 11 and the lower die frame 21 by another structure, and for example, a plurality of auxiliary pins may be provided at corresponding positions of the upper die frame 11 and the lower die frame 21, and each auxiliary pin may be connected between the upper die material core 12 and the upper die frame 11 or between the lower die material core 22 and the lower die frame 21 so as to fix the two.

In this embodiment, the lower mold 2 further includes a plurality of positioning portions 25, and each positioning portion 25 is uniformly disposed at a position corresponding to the outer contour of the blanking member, so as to position the blanking member.

As shown in fig. 4 and 5, the lower mold 2 is provided with six positioning portions 25 in this embodiment, two of the positioning portions limit the top surface of the blanking member, two of the positioning portions limit the side surfaces of the blanking member, and two of the positioning portions limit the bottom surface of the blanking member.

Specifically, the positioning portion 25 of the present embodiment is a limit pin protruding from the lower mold 2 to limit the position of the blanking member. Of course, the positioning portion 25 may also be other structures besides the limit pin, and the invention is not limited to this, as long as it can limit the placement position of the blanking member.

The upper die core 12 in this embodiment includes an upper die core insert 121, and the upper die core 12 is in contact with the blanking member through the upper die core insert 121.

Since the portion of the upper mold core 12 and the lower mold core 22 that contacts the falling material needs to have sufficient strength during the forming of the falling material, the portions that contact the falling material should be made of a material having sufficient strength. As shown in fig. 1 and 2, the upper die core insert 121 is disposed at the bottom of the upper die core 12, and is capable of cooperating with the lower die core 22 to contact the blanking member and press out the top ribs 31. By adopting the structure, the upper die pressing material core 12 does not need to integrally adopt high-strength materials with higher cost, and only needs the upper die pressing material core insert 121 to be made of the high-strength materials, so that the overall cost of the forming die of the first automobile rear floor beam can be effectively reduced.

In addition, when the automobile rear floor cross beam with different sizes or structures is produced, only the structure of the upper die pressing core insert 121 needs to be replaced by a required structure, and the upper die pressing core 12 does not need to be replaced integrally, so that the manufacturing cost of the automobile rear floor cross beam I is indirectly reduced.

Correspondingly, the lower die core 22 may also reduce the overall cost by disposing the lower die core insert on the top surface, which is not limited in the present invention as long as it can complete the forming operation. It should be understood that, in practical applications, the upper die pressing core 12 and the upper die pressing core insert 121 may also be integrally formed, and the whole is made of a high-strength material, which is not limited in the present invention.

In this embodiment, the two sides of the upper die 1 and the lower die 2 are provided with the fixture block 15 and the clamping groove 26 which can be matched with each other, and the fixture block 15 can be clamped into the clamping groove 26 so as to limit the upper die 1 and the lower die 2.

As shown in fig. 3-7, in this embodiment, the upper die 1 is provided with the fixture block 15, and the lower die 2 is provided with the fixture groove 26, in practical application, the upper die 1 may also be provided with the fixture groove 26, and the lower die 2 is provided with the fixture block 15. It can be understood that the limiting structure between the upper die 1 and the lower die 2 may also be other structures besides the fixture block 15 and the clamping groove 26, and the invention is not limited to this, as long as the upper die 1 and the lower die 2 can be limited by the limiting structure, for example, a plurality of limiting blocks may be further arranged on the upper surface of the lower die frame 21, and a plurality of limiting holes are correspondingly arranged on the lower surface of the upper die frame 11, and the limiting blocks are matched with the limiting holes to limit the upper die 1 and the lower die 2.

The invention also provides a forming process of the first automobile rear floor beam, which comprises the steps of blanking, forming, shaping and punching side punching, wherein the forming step is based on the forming die of the first automobile rear floor beam, and the specific steps are as follows:

blanking: cutting the plate along a blanking line, and removing parts except the blanking line to obtain a blanking piece;

forming: placing the blanking part on the lower die 2, moving the upper die 1 downwards and pressing the blanking part with the lower die 2, and pressing the blanking part by abutting against the upper die material pressing core 12 and pressing the blanking part and the lower die material pressing core 22 out of top surface ribs 31 of the primary forming part 3; the upper die insert 13 is abutted against and presses the blanking part and the lower die pressing core 22 to press an outer swing side wall 32 and a side wall concave bag 33 of the primary forming part 3, and the outer swing side wall 32 swings for a preset angle compared with the outer swing of the final finished product; the upper die material core 12 compresses the blanking part and presses the blanking part and the lower die insert 23 to form a flanging 34 of the primary formed part 3, so as to obtain the primary formed part 3, namely the structure shown in fig. 9;

shaping: pressing the outer swing side wall 32 of the primary forming member 3 inwards to form a side wall 41 at a preset angle, and pressing the side wall concave bag 33 into a side wall rib 42 to obtain a shaping member 4, namely the structure shown in fig. 10;

punching the side of the punched hole: and punching holes at preset positions on the top surface and the side surface of the shaping piece 4, and finishing the forming of the automobile rear floor beam.

The blanking step refers to fig. 8, wherein a sheet material line 5 is the whole shape of a sheet material before blanking, namely, a rectangle as shown in fig. 8, and a blanking line 6 is a cutting line during blanking, the blanking is performed by adopting the method, the material utilization rate of the first automobile rear floor beam can reach 74%, the material utilization rate is remarkably improved compared with that of a drawing process, and the manufacturing cost of the first automobile rear floor beam is lower; the primary forming piece 3 of the automobile rear floor beam I is directly extruded out through the upper die 1 and the lower die 2, so that the wrinkling phenomenon of local positions can be effectively prevented, and the quality of finished products is high.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.