A forming die and forming process for an automotive rear floor crossbeam 1

Abstract

The present invention provides a forming die and a forming process for an automotive rear floor crossmember I. The forming die for the automotive rear floor crossmember I is used to form a blank of the automotive rear floor crossmember I into a preformed part, and includes a corresponding upper die and a lower die. The upper die can move downward to approach and press the lower die. The upper die includes an upper die frame, an upper die blank holder core, and an upper die insert. The lower die includes a lower die frame, a lower die blank holder core, and a lower die insert. The upper die blank holder core and the lower die blank holder core can press out the top rib of the preformed part. The upper die insert and the lower die blank holder core can press out the side wall shape of the preformed part. The upper die blank holder core and the lower die insert press out the flange of the preformed part. With the above structure, the automotive rear floor crossmember I is made by a forming process. Each structure is directly pressed out by the upper die and the lower die, effectively avoiding the wrinkling problem, and the quality of the final product is relatively high. Moreover, the forming process does not require the setting of process supplements and a blank holding surface, the material utilization rate is relatively high, and the overall cost is relatively low.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile manufacturing, and particularly relates to a forming die and a forming process for an automobile rear floor crossbeam 1. Background Art

[0002] Among the parts of an automobile, more than 60% of the overall parts are stamping parts. In the prior art, most of the stamping parts are produced by the drawing process. The drawing process is a stamping process method that uses a drawing die to press a flat blank into various hollow workpieces with openings, or processes a formed hollow workpiece with an opening into other shaped hollow workpieces.

[0003] The automobile rear floor crossbeam 1 is a stamping part made by the drawing process. Due to the process limitations of the drawing process itself, process supplements and a blank holder surface need to be set, resulting in a low material utilization rate of the drawing process and a high manufacturing cost of the automobile rear floor crossbeam 1.

[0004] In order to improve the material utilization rate during the manufacturing process to reduce the manufacturing cost, the automobile rear floor crossbeam 1 can also be manufactured by a forming process. The forming process does not require process supplements and a blank holder surface, and has a high material utilization rate, which can effectively reduce the manufacturing cost of stamping parts. However, compared with the drawing process, the forming process is more likely to produce wrinkling phenomena. That is, during the forming process of the automobile rear floor crossbeam 1, wrinkles are more likely to exist in its top surface ribs, side walls, and side wall concave ribs, resulting in poor final product quality and even unusability.

[0005] Therefore, how to provide a production method that can prevent wrinkling during the forming process of the automobile rear floor crossbeam 1 is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0006] The purpose of the present invention is to provide a production method that can prevent wrinkling during the forming process of the automobile rear floor crossbeam 1.

[0007] To solve the above technical problems, the present invention provides a forming die for the first automotive rear floor crossmember, which is used to form the blank of the first automotive rear floor crossmember into a preliminary formed part. The forming die includes a corresponding upper die and a lower die. The upper die can move downward to approach and press the lower die. The upper die includes an upper die frame, an upper die blank holder core and an upper die insert installed on the upper die frame. The upper die blank holder core can move vertically relative to the upper die frame. The lower die includes a lower die frame, a lower die blank holder core and a lower die insert installed on the lower die frame. The lower die blank holder core can move vertically relative to the lower die frame. During the process that the upper die moves downward and presses the lower die, the upper die blank holder core can press the blank and cooperate with the lower die blank holder core to press out the top rib of the preliminary formed part. The upper die insert can press the blank and cooperate with the lower die blank holder core to press out the outer swing side wall and the side wall concave of the preliminary formed part. After the upper die and the lower die are pressed together, the upper die blank holder core and the lower die blank holder core can move downward together, so that the upper die blank holder core presses the blank and cooperates with the lower die insert to press out the flange of the preliminary formed part.

[0008] With the above structure, the first automotive rear floor crossmember is made by a forming process. Each structure is directly pressed out by the upper die and the lower die, effectively avoiding the wrinkling problem, and the quality of the final product is relatively high. Moreover, the forming process does not require the setting of process supplements and blank holding surfaces, the material utilization rate is relatively high, and the overall cost is relatively low.

[0009] Optionally, a first driving part is arranged at the upper end of the upper die blank holder core. The first driving part can drive the upper die blank holder core to move vertically inside the upper die frame.

[0010] Optionally, the first driving part is a nitrogen cylinder, and the piston end of the nitrogen cylinder is connected to the upper die blank holder core.

[0011] Optionally, a second driving part is arranged at the lower end of the lower die blank holder core. The second driving part can drive the lower die blank holder core to move vertically inside the lower die frame.

[0012] Optionally, the second driving part is a nitrogen cylinder, and the piston end of the nitrogen cylinder is connected to the lower die blank holder core.

[0013] Optionally, the lower die further includes a plurality of positioning parts. Each positioning part is evenly arranged at a position corresponding to the outer contour of the blank to position the blank.

[0014] Optionally, the upper die blank holder core includes an upper die blank holder core insert, and the upper die blank holder core contacts the blank through the upper die blank holder core insert.

[0015] Optionally, clamping blocks and clamping grooves which can cooperate with each other are arranged on both sides of the upper die and the lower die, and the clamping blocks can be clamped into the clamping grooves to limit the upper die and the lower die.

[0016] The present invention also provides a forming process for an automotive rear floor crossbeam 1, including blanking, forming, sizing, and punching and side punching. The forming step is based on the forming die for the automotive rear floor crossbeam 1 described above, and the specific steps are as follows: Blanking: Cut the sheet along the blanking line to remove the part outside the blanking line to obtain a blanked part; Forming: Place the blanked part on the lower die, move the upper die downward and press it against the lower die, and the upper die pressure core abuts against and presses the blanked part, and together with the lower die pressure core, press out the top ribs of the preliminary formed part; The upper die insert abuts against and presses the blanked part, and together with the lower die pressure core, press out the outwardly swinging side wall and the side wall concave pocket of the preliminary formed part, and the outwardly swinging side wall is preset at an angle compared with the final product; The upper die pressure core presses the blanked part and presses out the flanging of the preliminary formed part together with the lower die insert to obtain the preliminary formed part; Sizing: Press the outwardly swinging side wall inward by a preset angle to form a side wall, and then press the side wall concave pocket into a side wall rib to obtain a sized part; Punching and side punching: Punch holes at preset positions on the top surface and side surface of the sized part, and the forming of the automotive rear floor crossbeam 1 is completed. Description of the Drawings

[0017] Figure 1 is a schematic cross-sectional structure diagram of the forming die for the automotive rear floor crossbeam 1 provided by an embodiment of the present invention when not pressed;

[0018] Figure 2 is Figure 1 the schematic cross-sectional structure diagram of the forming die for the automotive rear floor crossbeam 1 in the [reference number] when pressed;

[0019] Figure 3 is a schematic overall three-dimensional structure diagram of the forming die for the automotive rear floor crossbeam 1 provided by an embodiment of the present invention;

[0020] Figure 4 is Figure 2 the top view of the lower die in the [reference number];

[0021] Figure 5 is Figure 2 the schematic three-dimensional structure diagram of the lower die in the [reference number];

[0022] Figure 6 is Figure 2 the bottom view of the upper die in the [reference number];

[0023] Figure 7 is Figure 2 the schematic three-dimensional structure diagram of the upper die after being flipped in the [reference number];

[0024] Figure 8It is the blanking contour diagram of the sheet metal during blanking in the forming method of the first rear floor cross member provided by the embodiment of the present invention;

[0025] Figure 9 It is the structural schematic diagram of the preliminary formed part in the forming method of the first rear floor cross member provided by the embodiment of the present invention;

[0026] Figure 10 It is the structural schematic diagram of the sizing part in the forming method of the first rear floor cross member provided by the embodiment of the present invention.

[0027] Figures 1 - 10 The reference signs in the figure are explained as follows:

[0028] 1 Upper die, 11 Upper die frame, 12 Upper die blank holder, 121 Upper die blank holder insert, 13 Upper die insert, 14 First driving part, 15 Block, 2 Lower die, 21 Lower die frame, 22 Lower die blank holder, 23 Lower die insert, 24 Second driving part, 25 Positioning part, 26 Card slot, 3 Preliminary formed part, 31 Top surface rib, 32 Outer swing side wall, 33 Side wall concave, 34 Flange, 4 Sizing part, 41 Side wall, 42 Side wall rib, 5 Sheet metal line, 6 Blanking line. Detailed implementation manners

[0029] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Please refer to Figures 1 - 10 , Figure 1 It is the sectional structural schematic diagram of the forming die of the first rear floor cross member provided by the embodiment of the present invention when not clamped; Figure 2 It is Figure 1 the sectional structural schematic diagram of the forming die of the first rear floor cross member in Figure 3 when clamped; Figure 4 It is the overall three-dimensional structural schematic diagram of the forming die of the first rear floor cross member provided by the embodiment of the present invention; Figure 2 It is the top view of the lower die in

[0031] Figure 5 It is Figure 2 the three-dimensional structural schematic diagram of the lower die in Figure 6 It is Figure 2 the bottom view of the upper die in Figure 7 It is Figure 2 the three-dimensional structural schematic diagram of the upper die after flipping in Figure 8 It is the blanking contour diagram of the sheet metal during blanking in the forming method of the first rear floor cross member provided by the embodiment of the present invention; Figure 9 It is the structural schematic diagram of the preliminary formed part in the forming method of the first rear floor cross member provided by the embodiment of the present invention;

[0032] Figure 10 It is a schematic structural diagram of a sizing part in the forming method of the first automotive rear floor crossbeam provided by an embodiment of the present invention.

[0033] The present invention provides a forming die for the first automotive rear floor crossbeam, which is used to form a blanking part of the first automotive rear floor crossbeam into a preliminary formed part 3, and includes a corresponding upper die 1 and a lower die 2. The upper die 1 can move downward to approach and press the lower die 2. The upper die 1 includes an upper die frame 11, an upper die blank holder core 12 and an upper die insert 13 installed on the upper die frame 11. The upper die blank holder core 12 can move vertically relative to the upper die frame 11. The lower die 2 includes a lower die frame 21, a lower die blank holder core 22 and a lower die insert 23 installed on the lower die frame 21. The lower die blank holder core 22 can move vertically relative to the lower die frame 21;

[0034] During the process that the upper die 1 moves downward and presses the lower die 2, the upper die blank holder core 12 can press the blanking part and cooperate with the lower die blank holder core 22 to press out the top rib 31 of the preliminary formed part 3. The upper die insert 13 can press the blanking part and cooperate with the lower die blank holder core 22 to press out the outer swing side wall 32 and the side wall concave 33 of the preliminary formed part 3;

[0035] After the upper die 1 and the lower die 2 are pressed together, the upper die blank holder core 12 and the lower die blank holder core 22 can move downward together, so that the upper die blank holder core 12 presses the blanking part and cooperates with the lower die insert 23 to press out the flange 34 of the preliminary formed part 3.

[0036] With the above structure, the first automotive rear floor crossbeam is made by a forming process, and each structure is directly pressed out by the upper die 1 and the lower die 2, effectively avoiding the wrinkling problem of some positions of the first automotive rear floor crossbeam, and the final product quality is relatively high; and the forming process does not need to set process supplements and a blank holding surface, the material utilization rate is relatively high, and the overall cost is relatively low.

[0037] Among them, the blanking part refers to a sheet metal whose shape matches that of the finished first automotive rear floor crossbeam after blanking in the forming process of the first automotive rear floor crossbeam; the preliminary formed part 3 refers to a semi-finished sheet metal whose overall structure matches that of the finished first automotive rear floor crossbeam after blanking and forming in the forming process of the first automotive rear floor crossbeam. This embodiment is used for the forming step of the forming process of the first automotive rear floor crossbeam and can process the blanking part into the preliminary formed part 3.

[0038] Please refer to Figures 1 - 7 , the upper die blank holder core 12 and the upper die insert 13 are arranged inside the upper die frame 11, the lower die blank holder core 22 and the lower die insert 23 are arranged inside the lower die frame 21, and the shapes of the upper die blank holder core 12, the upper die insert 13, the lower die blank holder core 22 and the lower die insert 23 all match the shape and structure of the preliminary formed part 3.

[0039] Specifically, after placing the blanking part at a predetermined position of the lower die 2, the upper die 1 moves downward, i.e., approaches the lower die 2. The pressure core 12 of the upper die first contacts the blanking part, presses the blanking part and cooperates with the pressure core 22 of the lower die to press out the top rib 31 of the preliminary formed part 3.

[0040] After pressing out the top rib 31, the pressure core 12 of the upper die and the pressure core 22 of the lower die remain relatively stationary with respect to the lower die 2. The upper die 1 continues to move downward, and the pressure core 12 of the upper die then moves vertically upward relative to the upper die 1 within the upper die frame 11. Subsequently, the insert block 13 of the upper die will contact the blanking part, press the blanking part and cooperate with the pressure core 22 of the lower die to press out the outer swing side wall 32 and the side wall concave pocket 33 of the preliminary formed part 3. At this time, compared with the finished product of the automotive rear floor cross member one, the side wall of the outer swing side wall 32 and the side wall concave pocket 33 swings outwards by a preset angle. The preset angle is selected as 30 degrees in this embodiment.

[0041] After pressing out the outer swing side wall 32 and the side wall concave pocket 33, the upper die 1 is completely pressed and fitted with the lower die 2. At this time, the pressure core 12 of the upper die and the pressure core 22 of the lower die continue to remain relatively stationary and move vertically downward together. During this process, the pressure core 12 of the upper die can cooperate with the insert block 23 of the lower die to press out the flanging 34 of the preliminary formed part 3, and the preliminary formed part 3 is manufactured.

[0042] During the above process, since each part structure of the preliminary formed part 3 is directly pressed out by the upper die 1 and the lower die 2, the wrinkling phenomenon of the preliminary formed part 3 can be effectively avoided, and the quality of the finished product of the automotive rear floor cross member one is effectively improved.

[0043] In this embodiment, a first driving part 14 is provided at the upper end of the pressure core 12 of the upper die. The first driving part 14 can drive the pressure core 12 of the upper die to move up and down inside the upper die frame 11. Specifically, the first driving part 14 is a nitrogen cylinder, and the piston end of the nitrogen cylinder is connected to the pressure core 12 of the upper die.

[0044] The first driving part 14 can, during the pressing process of the upper die 1 and the lower die 2, first control the pressure core 12 of the upper die to maintain an extended state for movement. After pressing out the top rib 31, it moves vertically upward relative to the upper die 1, remains stationary with the pressure core 22 of the lower die, and continues to drive the pressure core 12 of the upper die to move vertically downward after the upper die 1 and the lower die 2 are completely pressed and fitted, and cooperate with the insert block 23 of the lower die to press out the flanging 34 of the preliminary formed part 3.

[0045] In this embodiment, a second driving part 24 is provided at the lower end of the pressure core 22 of the lower die. The second driving part 24 can drive the pressure core 22 of the lower die to move up and down inside the lower die frame 21. Specifically, the second driving part 24 is a nitrogen cylinder, and the piston end of the nitrogen cylinder is connected to the pressure core 22 of the lower die.

[0046] During the pressing process of the upper die 1 and the lower die 2, the second driving part 24 can first control the lower die blank holding core 22 to remain in the extended state. After the upper die 1 and the lower die 2 are completely pressed and fitted together, it remains relatively stationary with the upper die blank holding core 12 and moves vertically downward together, so that the upper die blank holding core 12 can cooperate with the lower die insert 23 to press out the flanging 34 of the preliminary formed part 3.

[0047] It can be understood that the first driving part 14 and the second driving part 24 can also be other driving structures besides the nitrogen cylinder, such as oil cylinders, motors, etc. The present invention does not limit this, as long as the two can achieve the above functions.

[0048] In addition, in addition to the above-mentioned method of fixing and connecting the upper die blank holding core 12 and the lower die blank holding core 22 only through the first driving part 14 and the second driving part 24, the upper die blank holding core 12 and the lower die blank holding core 22 can also be fixed and connected to the upper die frame 11 and the lower die frame 21 through other structures. For example, a number of auxiliary pins can be provided at corresponding positions of the upper die frame 11 and the lower die frame 21, and each auxiliary pin can be connected between the upper die blank holding core 12 and the upper die frame 11 or the lower die blank holding core 22 and the lower die frame 21 to fix the two.

[0049] In this embodiment, the lower die 2 further includes a number of positioning parts 25, and each positioning part 25 is uniformly arranged at a position corresponding to the outer contour of the blanking part to position the blanking part.

[0050] Specifically, as Figure 4 and Figure 5 shown, in this embodiment, the lower die 2 is provided with six positioning parts 25, two of which limit the top surface of the blanking part, two limit the side surface of the blanking part, and two limit the bottom surface of the blanking part.

[0051] Specifically, the positioning part 25 of this embodiment is a limit pin, which protrudes from the lower die 2 to limit the blanking part. Of course, the positioning part 25 can also be other structures besides the limit pin. The present invention does not limit this, as long as it can limit the placement position of the blanking part.

[0052] In this embodiment, the upper die blank holding core 12 includes an upper die blank holding core insert 121, and the upper die blank holding core 12 contacts the blanking part through the upper die blank holding core insert 121.

[0053] Since during the forming process of the blanking part, the part in contact with the blanking part needs to have sufficient strength, the components of the upper die blank holding core 12 and the lower die blank holding core 22 that are in contact with the blanking part should be made of materials with sufficient strength. Specifically, as Figure 1 and Figure 2As shown, the upper die blank holder insert 121 is arranged at the bottom of the upper die blank holder 12 and can cooperate with the lower die blank holder 22 to contact the blanking part and press out the top surface rib 31. With the above structure, the upper die blank holder 12 does not need to be made of high-strength material with high cost as a whole. Only the upper die blank holder insert 121 needs to be made of high-strength material, which can effectively reduce the overall cost of the forming die of the first automotive rear floor crossbeam.

[0054] In addition, when manufacturing the first automotive rear floor crossbeams of different sizes or structures, only the structure of the upper die blank holder insert 121 needs to be replaced with the required structure, rather than replacing the upper die blank holder 12 as a whole, indirectly reducing the manufacturing cost of the first automotive rear floor crossbeam.

[0055] Correspondingly, the lower die blank holder 22 can also reduce the overall cost by setting a lower die blank holder insert on the top surface. The present invention does not limit this as long as it can complete the forming operation. It can be understood that in actual application, the upper die blank holder 12 and the upper die blank holder insert 121 can also be integrally formed, and the whole is made of high-strength material. The present invention does not limit this.

[0056] In this embodiment, clamping blocks 15 and clamping grooves 26 that can cooperate with each other are arranged on both sides of the upper die 1 and the lower die 2. The clamping blocks 15 can be clamped into the clamping grooves 26 to limit the upper die 1 and the lower die 2.

[0057] Specifically, as Figures 3 - 7 shown, in this embodiment, the upper die 1 is provided with clamping blocks 15, and the lower die 2 is provided with clamping grooves 26. In actual application, it can also be that the upper die 1 is provided with clamping grooves 26 and the lower die 2 is provided with clamping blocks 15. It can be understood that the limiting structure between the upper die 1 and the lower die 2 can also be other structures other than the clamping blocks 15 and the clamping grooves 26. The present invention does not limit 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 can also be arranged on the upper surface of the lower die frame 21, and a plurality of limiting holes can be correspondingly arranged on the lower surface of the upper die frame 11. The limiting blocks and the limiting holes cooperate to limit the upper die 1 and the lower die 2.

[0058] The present invention also provides a forming process for the first automotive rear floor crossbeam, including blanking, forming, shaping and punching and side punching. The forming step is based on the forming die of the first automotive rear floor crossbeam described above. The specific steps are as follows:

[0059] Blanking: Cut the sheet along the blanking line to remove the part outside the blanking line to obtain the blanking part;

[0060] Forming: Place the blanking part on the lower die 2, move the upper die 1 downward and press it tightly against the lower die 2. The pressure core 12 of the upper die abuts against and presses the blanking part tightly, and together with the pressure core 22 of the lower die, presses out the top surface ribs 31 of the preliminary formed part 3. The insert block 13 of the upper die abuts against and presses the blanking part tightly, and together with the pressure core 22 of the lower die, presses out the outwardly swinging side wall 32 and the side wall concave pocket 33 of the preliminary formed part 3. The outwardly swinging side wall 32 is preset at an angle compared to the outward swing of the final product. The pressure core 12 of the upper die presses the blanking part tightly and, together with the insert block 23 of the lower die, presses out the flanging 34 of the preliminary formed part 3 to obtain the preliminary formed part 3, that is, as shown in Figure 9 the structure shown;

[0061] Shaping: Press the outwardly swinging side wall 32 of the preliminary formed part 3 inward to a preset angle to form the side wall 41, and then press the side wall concave pocket 33 into the side wall rib 42 to obtain the shaped part 4, that is, as shown in Figure 10 the structure shown;

[0062] Punching and side punching: Punch holes at preset positions on the top surface and side surface of the shaped part 4, and the forming of the first automotive rear floor crossbeam is completed.

[0063] Among them, for the blanking step, please refer to Figure 8 , where the sheet metal line 5 is the overall shape of the sheet metal before blanking, that is, the rectangle shown in Figure 8 . The blanking line 6 is the cutting line during blanking. By using this method for blanking, the material utilization rate of the first automotive rear floor crossbeam can reach 74%, and the material utilization rate is significantly improved compared to the drawing process. The manufacturing cost of the first automotive rear floor crossbeam is relatively low. The preliminary formed part 3 of the first automotive rear floor crossbeam is directly pressed out by the upper die 1 and the lower die 2, which can effectively prevent the wrinkling phenomenon at local positions, and the quality of the finished product is relatively high.

[0064] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. The forming process of the first rear floor crossbeam of an automobile, characterized in that: It includes blanking, forming, sizing, and punching and side punching. The specific steps are as follows: Blanking: Cut the sheet along the blanking line to remove the part outside the blanking line, obtaining a blanked part; Forming: Place the blanked part on the lower die (2), move the upper die (1) downward and press it tightly against the lower die (2). The upper die pressure core (12) abuts and presses tightly against the blanked part and presses out the top surface rib (31) of the preliminary formed part (3) together with the lower die pressure core (22). The upper die insert (13) abuts and presses tightly against the blanked part and presses out the outward swinging side wall (32) and the side wall concave pocket (33) of the preliminary formed part (3). The outward swinging side wall (32) is preset at an angle relative to the outward swing of the final product. The upper die pressure core (12) presses tightly against the blanked part and presses out the flanging (34) of the preliminary formed part (3) together with the lower die insert (23), obtaining the preliminary formed part (3); Sizing: Press the outward swinging side wall (32) of the preliminary formed part (3) inward by a preset angle to form a side wall (41), and then press the side wall concave pocket (33) into a side wall rib (42), obtaining a sized part (4); Punching and side punching: Punch holes at preset positions on the top surface and side surface of the sized part (4), and the forming of the first automotive rear floor crossbeam is completed Among them, the forming step is based on the forming die of the first automotive rear floor crossbeam. The forming die includes a corresponding upper die (1) and a lower die (2). The upper die (1) can move downward to approach and press tightly against the lower die (2). The upper die (1) includes an upper die frame (11) and an upper die pressure core (12) and an upper die insert (13) installed on the upper die frame (11). The upper die pressure core (12) can move vertically relative to the upper die frame (11). The lower die (2) includes a lower die frame (21) and a lower die pressure core (22) and a lower die insert (23) installed on the lower die frame (21). The lower die pressure core (22) can move vertically relative to the lower die frame (21); During the process of the upper die (1) moving downward and pressing tightly against the lower die (2), the upper die pressure core (12) can press tightly against the blanked part and press out the top surface rib (31) of the preliminary formed part (3) together with the lower die pressure core (22). The upper die insert (13) can press tightly against the blanked part and press out the outward swinging side wall (32) and the side wall concave pocket (33) of the preliminary formed part (3) together with the lower die pressure core (22); After the upper die (1) and the lower die (2) are pressed tightly, the upper die pressure core (12) and the lower die pressure core (22) can move downward together, so that the upper die pressure core (12) presses tightly against the blanked part and presses out the flanging (34) of the preliminary formed part (3) together with the lower die insert (23).

2. The forming process of the first rear floor cross member of the vehicle according to claim 1, characterized in that: A first driving part (14) is arranged at the upper end of the upper die pressure core (12), and the first driving part (14) can drive the upper die pressure core (12) to move vertically inside the upper die frame (11).

3. The forming process of the first rear floor cross member of the automobile according to claim 2, characterized in that: The first driving part (14) is a nitrogen cylinder, and the piston end of the nitrogen cylinder is connected to the upper die pressure core (12).

4. The forming process of the first rear floor crossbeam of the vehicle according to claim 1, characterized in that: A second driving part (24) is provided at the lower end of the lower die blanking core (22), and the second driving part (24) can drive the lower die blanking core (22) to move vertically inside the lower die frame (21).

5. The forming process of the first rear floor cross member of an automobile according to claim 4, characterized in that: The second driving part (24) is a nitrogen cylinder, and the piston end of the nitrogen cylinder is connected to the lower die blanking core (22).

6. The forming process of the automotive rear floor crossmember 1 according to claim 1, characterized in that: The lower die (2) further includes a plurality of positioning parts (25), and each of the positioning parts (25) is uniformly arranged at a position corresponding to the outer contour of the blanking part to position the blanking part.

7. The forming process of the automotive rear floor crossmember 1 according to claim 1, characterized in that: The upper die blanking core (12) includes an upper die blanking core insert block (121), and the upper die blanking core (12) contacts the blanking part through the upper die blanking core insert block (121).

8. The forming process of the automotive rear floor cross member 1 according to claim 1, characterized in that: Engaging blocks (15) and engaging grooves (26) that can cooperate with each other are provided on both sides of the upper die (1) and the lower die (2), and the engaging blocks (15) can be engaged into the engaging grooves (26) to limit the upper die (1) and the lower die (2).

Images