A continuous stamping method of a tailgate lock cover reinforcing bracket

Abstract

The present application relates to a kind of tailgate lock cover reinforcing bracket continuous stamping method, steps include: punch positioning hole, outer trimming, step deformation, trimming, punch, bending and blanking;Outer trimming is cut off L-shaped waste from the material strip, leaving an integral connection band-shaped part and cantilever part connected to one side of the band-shaped part, L-shaped waste is located on the opposite side of the connection area, the range of band-shaped part includes all materials of connection area, main plane part, reinforcing fixed part and accessory fixed part, cantilever part includes all materials of three-dimensional fixed part;Trimming is cut off J-shaped waste from one side of the band-shaped part, to get the overall outer contour of the main plane part and the accessory fixed part.The present application method uses progressive die continuous processing in whole process, punching, trimming, bending, punch, blanking are integrated in a production line, J-shaped waste is temporarily retained in trimming step to maintain the integrity of the material on the opposite side of the three-dimensional fixed part, and the J-shaped waste is removed after the three-dimensional fixed part is completed overall bending forming, which ensures the forming precision and high production efficiency.

Description

Technical Field

[0001] This invention relates to the field of stamping technology, and in particular to a continuous stamping method for a tailgate lock cover reinforcement bracket. Background Technology

[0002] Figure 1 This is a tailgate lock cover reinforcement bracket 1, which is a metal stamping part with an overall W-shaped multi-bend structure. It includes an integrally connected main plane portion 11, a three-dimensional fixing portion 12, a reinforcing fixing portion 13, and an auxiliary fixing portion 14. The reinforcing fixing portion 13 and the auxiliary fixing portion 14 are connected side by side to the first side of the main plane portion 11, and the three-dimensional fixing portion 12 is connected to the second side of the main plane portion 11, with the first side and the second side facing opposite directions. The three-dimensional fixing part 12 has a left-right symmetrical structure, including two L-shaped support materials 121 and a three-dimensional connecting material 122 located between the two L-shaped support materials 121. The L-shaped support material 121 includes a first bending surface 1211 that is perpendicularly connected to the main plane part 11 and a second bending surface 1212 that is perpendicularly connected to the other side of the first bending surface 1211. The second bending surface is parallel to the main plane part 11. The two sides of the three-dimensional connecting material 122 are seamlessly and smoothly transitioned to the two first bending surfaces 1211 and the two second bending surfaces 1212 respectively to generate a single-step support effect. Each of the two second bending surfaces 1212 is provided with an oblong hole 1213, and one of the first bending surfaces 1211 is provided with a round hole 1214. The reinforcing fixing part 13 includes a reinforcing fixing surface 131 perpendicularly connected to the main plane part 11, multiple reinforcing protrusions 132 located on the reinforcing fixing surface 131, and multiple reinforcing fixing holes 133 provided on the reinforcing fixing surface 131. The reinforcing protrusions 132 provide multi-step support to the reinforcing fixing surface 13. The auxiliary fixing part 14 includes an auxiliary fixing surface 141 with a discontinuity between it and the main plane part 11, and auxiliary fixing holes 142 provided on the auxiliary fixing surface 141. The main plane part 11 and the three-dimensional connecting material 122 have no holes. The oblong hole 1213 and the auxiliary fixing hole 142 are generally oriented towards the first opening direction, and the round hole 1214 and the reinforcing fixing hole 133 are generally oriented towards the second opening direction. The included angle between the two opening directions is approximately 90°. This structure is very complex, with many bending points, different surface orientations, and most surfaces having through holes, requiring many processing steps. Typically, when designing the product layout of the strip, the two ends of the main plane 11 may be considered as the positions for connecting materials. However, the connection width that can be set at these two positions is limited, and they are easily pulled off course when making large bends.

[0003] Chinese patent CN120715108A discloses a method for processing a tailgate lock cover. The tailgate lock cover has a T-shaped bending structure, including a transverse part, a main bending edge, and a longitudinal part connected in sequence. The longitudinal part has a main body, which is a plate surface used for fixed connection. The main body has its rigidity enhanced by the outer side edge and the concave-convex pleated structure in the middle to ensure its flatness. This longitudinal part has some functional similarity to the three-dimensional fixing part 12, but the structure is very different and cannot inspire how to process the three-dimensional fixing part 12. The three-dimensional fixing part 12 is not connected to the main plane part 11 on one side, which makes the three-dimensional fixing part 12 susceptible to stretching or even tearing during deformation.

[0004] Therefore, it is necessary to design a dedicated continuous stamping method to process the tailgate lock cover reinforcement bracket. Summary of the Invention

[0005] The main objective of this invention is to provide a continuous stamping method for a tailgate lock cover reinforcement bracket, which can temporarily retain the J-shaped waste to maintain the integrity of the material on the opposite side of the three-dimensional fixing part, and remove the J-shaped waste after the three-dimensional fixing part has been fully bent and formed, thus ensuring forming accuracy and high production efficiency.

[0006] This invention achieves the above objective through the following technical solution: a continuous stamping method for a tailgate lock cover reinforcing bracket, used to form a tailgate lock cover reinforcing bracket, the tailgate lock cover reinforcing bracket comprising an integrally connected main plane portion, a three-dimensional fixing portion, a reinforcing fixing portion, and an auxiliary fixing portion, the reinforcing fixing portion and the auxiliary fixing portion being connected side-by-side to a first side of the main plane portion, the three-dimensional fixing portion being connected to a second side of the main plane portion, the first side and the second side being opposite in direction; the three-dimensional fixing portion comprising two L-shaped support materials and a three-dimensional connecting material located between the two L-shaped support materials, the L-shaped support material comprising a first bending surface perpendicularly connected to the main plane portion and a second bending surface perpendicularly connected to the other side of the first bending surface, the second bending surface being parallel to the main plane portion, the two sides of the three-dimensional connecting material being seamlessly and smoothly transitioned to the two first bending surfaces and the two second bending surfaces respectively; the reinforcing fixing portion comprising a reinforcing fixing surface perpendicularly connected to the main plane portion and a plurality of reinforcing protrusions located on the reinforcing fixing surface; the auxiliary fixing portion comprising an auxiliary fixing surface having a discontinuity with the main plane portion; the steps include: S1. Punching positioning holes: The material strip is conveyed forward using both sides as positioning references. The processing unit of the material strip includes a strip-shaped connecting area and a product area connected to one side of the connecting area. A main positioning hole is punched in the connecting area as a positioning reference for subsequent work stations. S2, External trimming: Cutting off L-shaped waste from the strip, leaving an integrally connected strip portion and a cantilever portion connected to one side of the strip portion. The L-shaped waste is located on the opposite side of the connecting area. The strip portion includes all the material of the connecting area, the main plane portion, the reinforcing fixing portion, and the auxiliary fixing portion. The cantilever portion includes all the material of the three-dimensional fixing portion. S3. Step-by-step deformation: First, bend the cantilever part upward at 45° relative to the strip part, then perform preliminary deformation according to the structure of the three-dimensional fixing part, and finally complete the shaping according to the structure of the three-dimensional fixing part. In the preliminary deformation, the radius of the transition fillet between each plane is greater than its final radius. S4. Trimming: Cut off the J-shaped waste material from one side of the strip to obtain the entire outer contour of the main plane part and the auxiliary fixing part; S5. Embossing: Simultaneously stamp out all reinforcing convex bulges and the gap between the auxiliary fixing surface and the main plane portion on the strip-shaped portion; S6. Bending: Folding out a folded edge between the main plane portion and the reinforcing fixing surface on the strip portion; S7. Material removal: Cut off the connecting area to cause the tailgate lock cover reinforcement bracket to fall off.

[0007] Specifically, the punching positioning hole step will also cut out a trimming positioning hole, which is located in the area surrounded by the L-shaped waste and close to the root of the cantilever.

[0008] Specifically, the punching positioning hole step also involves cutting two side notches of waste material on the same side of the strip portion. In the external trimming step, the 90° between the two side notches of waste material is bent into a guide fold. The guide fold is located in the middle of two adjacent main positioning holes and is opposite to the dividing line between the main plane portion and the three-dimensional fixing portion.

[0009] Specifically, the punching positioning hole step will also cut a process positioning hole in the middle of the strip. The blanking step is divided into two steps: the first step is to cut off the T-shaped waste material located between the reinforcing fixing surface and the connecting area, so that the reinforcing fixing surface and the connecting area are connected by two connecting edges, and the T-shaped waste material surrounds the process positioning hole; the second step is to cut off the two connecting edges.

[0010] Furthermore, the reinforcing fixing surface is provided with a plurality of reinforcing fixing holes, which are cut out at the same time as the T-shaped waste is removed.

[0011] Furthermore, a circular hole is provided on the first bending surface, which is cut out at the same time as the T-shaped waste is removed.

[0012] Specifically, the auxiliary fixing surface is provided with an auxiliary fixing hole, which is cut out between the trimming step and the embossing step.

[0013] Specifically, each of the two second bending surfaces is provided with a waist-shaped hole, which is cut out between the trimming step and the embossing step.

[0014] Specifically, the bending process is achieved through two bending steps: first, bending at 45°, and second, bending to 90°.

[0015] The beneficial effects of the technical solution of this invention are: 1. The entire process adopts progressive die continuous processing, integrating punching, trimming, bending, embossing and blanking into one production line. During the trimming step, J-shaped waste is temporarily retained to maintain the integrity of the material on the opposite side of the three-dimensional fixing part. The J-shaped waste is removed after the three-dimensional fixing part is completed and bent into shape, which ensures forming accuracy and high production efficiency. 2. The three-dimensional fixing part and the reinforced fixing surface adopt the step-by-step bending and pre-large rounded corner preliminary deformation process, which effectively improves the problems of sheet metal bending springback and cracking, and improves the consistency of product dimensions; 3. Multiple sets of positioning holes and guide folds are added, combined with a step-by-step material feeding structure, which greatly improves the accuracy of material conveying and the yield of product forming. 4. Each hole is processed at a corresponding workstation according to its structural characteristics. The process layout is reasonable and does not interfere with each other, making it suitable for the mass production of complex and irregular stamped parts. Attached Figure Description

[0016] Figure 1 A 3D view of the reinforcement bracket for the tailgate lock cover; Figure 2 This is a diagram showing the structural changes of the material strip; Figure 3 Top view of the material strip changes during the process of punching the positioning hole and cutting the outer edge; Figure 4 This is a three-dimensional diagram showing the changes in the material strip during the step-by-step deformation process; Figure 5 This is a top view showing the changes in the material strip during the trimming and embossing process; Figure 6 This is a top view showing the changes in the material strip during the bending and unloading process.

[0017] Figure 3 and Figure 5 The black area in the image represents the area where the material strip was cut off.

[0018] The diagram is marked as follows: 1-Tailgate lock cover reinforcing bracket, 11-Main plane part, 12-Three-dimensional fixing part, 121-L-shaped support material, 1211-First bending surface, 1212-Second bending surface, 1213-Oval hole, 1214-Round hole, 122-Three-dimensional connecting material, 13-Reinforced fixing part, 131-Reinforced fixing surface, 132-Reinforced protrusion, 133-Reinforced fixing hole, 14-Auxiliary fixing part, 141-Auxiliary fixing surface, 142-Auxiliary fixing hole; 2-Material strip, 2a-Strip section, 2b-Cantilever section, 21-Connecting area, 211-Main positioning hole, 212-Side notch waste, 213-Guide fold, 22-Product area, 23-L-shaped waste, 231-Cutting edge positioning hole, 24-J-shaped waste, 25-T-shaped waste, 251-Process positioning hole. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to specific embodiments.

[0020] Example: I. Overall Product Structure Description like Figure 1 As shown, the tailgate lock cover reinforcement bracket 1 processed in this embodiment is an integral stamped part, which is composed of a main plane part 11, a three-dimensional fixing part 12, a reinforcing fixing part 13, and an auxiliary fixing part 14.

[0021] The reinforcing fixing part 13 and the auxiliary fixing part 14 are arranged side by side on the first side of the main plane part 11, and the three-dimensional fixing part 12 is arranged on the second side of the main plane part 11, with the first side and the second side facing opposite directions.

[0022] The three-dimensional fixing part 12 includes two sets of symmetrically arranged L-shaped support materials 121, and a three-dimensional connecting material 122 connecting the two sets of L-shaped support materials 121. The L-shaped support material 121 is composed of a first bending surface 1211 and a second bending surface 1212. The first bending surface 1211 is perpendicularly connected to the main plane part 11, and the second bending surface 1212 is perpendicularly connected to the outside of the first bending surface 1211, and the second bending surface 1212 is parallel to the main plane part 11. The left and right sides of the three-dimensional connecting material 122 are seamlessly and smoothly transitioned to the two first bending surfaces 1211 and the two second bending surfaces 1212, respectively. A circular hole 1214 is opened on one of the first bending surfaces 1211, and an oblong hole 1213 is opened on each of the two second bending surfaces 1212.

[0023] The reinforcing fixing part 13 includes a reinforcing fixing surface 131 and a plurality of reinforcing protrusions 132. The reinforcing fixing surface 131 is vertically connected to the main plane part 11, and the reinforcing protrusions 132 are arranged in an array on the surface of the reinforcing fixing surface 131. The auxiliary fixing part 14 is provided with an auxiliary fixing surface 141, and a height difference is formed between the auxiliary fixing surface 141 and the main plane part 11. An auxiliary fixing hole 142 is provided on the auxiliary fixing surface 141.

[0024] II. Overall Layout of Continuous Stamping This method uses a progressive die to continuously stamp the strip 2. The strip 2 is divided into a connecting area 21 and a product area 22 along the conveying direction. The connecting area 21 is the continuous conveying carrier for the entire strip, and the product area 22 is used to form the body of the tailgate lock cover reinforcing bracket 1. During the processing, punching, trimming, step-by-step bending deformation, edge trimming, embossing, secondary bending, and step-by-step blanking are completed sequentially. Each station is arranged sequentially and operates continuously. The connecting area 21 and the product area 22 are separated by the outer contour of the reinforcing fixing surface 131. Therefore, the stamping process adopts a single-side, single-row layout. The main bending lines on the product are all along the conveying direction of the strip 2. Therefore, during the bending process, the die will generate a bias force on the strip 2 perpendicular to the conveying direction.

[0025] After processing, the strip 2 is first formed into a strip-shaped portion 2a and a cantilever portion 2b. The strip-shaped portion 2a covers the entire blank of the connecting area 21, the main plane portion 11, the reinforcing fixing portion 13, and the auxiliary fixing portion 14. The cantilever portion 2b is the forming blank of the three-dimensional fixing portion 12. The strip-shaped portion 2a and the cantilever portion 2b are separated by the folded edge of the material of the main plane portion 11 and the material of the three-dimensional fixing portion 12.

[0026] III. Implementation of Step-by-Step Stamping Process 3.1 Punch positioning holes like Figure 2 and Figure 3 As shown, the material belt 2 is conveyed forward in a straight line with the two sides of the material belt 2 as the external positioning reference. The main positioning hole 211 (within the range of the strip 2a) is punched in the connection area 21 of the material belt 2. The main positioning hole 211 serves as the unified positioning reference for all subsequent stations in the entire process, ensuring the processing position accuracy of each process.

[0027] Simultaneously, multiple auxiliary punching and cutting operations are completed at this workstation: 1. A cutting edge positioning hole 231 is punched out on the strip 2a. The cutting edge positioning hole 231 is located in the area surrounded by the L-shaped waste 23 to be cut off later, close to the root of the cantilever 2b. Its purpose is to provide accurate positioning for the subsequent external cutting edge process. 2. Cut off two side notches 212 on the same side of the strip 2a to reserve the forming position of the guide fold 213; 3. A process positioning hole 251 is punched in the middle of the strip section 2a. This process positioning hole 251 is subsequently surrounded by T-shaped scrap 25. The process positioning hole 251 is an auxiliary positioning hole that is closer to the product area 22 than the main positioning hole 211, and can provide more accurate positioning for bending and punching.

[0028] 3.2 External Cutting Edge like Figure 2 and Figure 3 As shown, the strip 2 is cut along the preset contour, and the L-shaped waste 23 is removed, so that the strip 2 is separated into a strip-shaped part 2a and a cantilever part 2b that are connected to each other; the L-shaped waste 23 is located on the opposite side of the connecting area 21.

[0029] The cantilever portion 2b presents a peninsula-like structure extending from one side of the strip portion 2a, at which point the boundary between the two is not yet clear. The actual product area 22 has a portion of missing material on the outer periphery of the corresponding auxiliary fixing surface 141 (the area where the J-shaped scrap 24 is located). Pre-forming this gap would create a weak area prone to tearing. Therefore, compared to the connecting area 21, the strip portion 2a (wider than the connecting area 21) also includes a J-shaped scrap 24 that can hold the corner of the cantilever portion 2b, filling the aforementioned missing material. The L-shaped scrap 23 and the J-shaped scrap 24 are actually adjacent scraps, together forming the complete outer periphery scrap of the product area 22. The advantage of cutting off the two scraps before and after the step-by-step deformation is that during the forming of the three-dimensional fixing part 12, the integrity of the material on opposite sides of the strip 2 is maintained, preventing the material at the junction of the reinforcing fixing part 13 and the auxiliary fixing part 14 from being pulled off-center or broken.

[0030] This process simultaneously bends the material between the two side-notch wastes 212 formed in S1 at a 90° angle to form a guide fold 213. The guide fold 213 is located in the middle of two adjacent main positioning holes 211 and is directly opposite the dividing line between the main plane part 11 and the three-dimensional fixing part 12. Because it is in the conveying direction of the material belt 2, it can provide anti-deviation guidance for the material belt 2. On the other hand, the guide fold 213 will make the cross-section of the connecting area 21 become L-shaped. The guide fold 213 and the base plane of the integrally connected connecting area 21 form a self-supporting effect in the vertical and horizontal directions, maintaining the flatness of the base plane, thereby ensuring that the fold position is not skewed in the subsequent bending steps.

[0031] 3.3 Step-by-step deformation like Figure 2 and Figure 4 As shown, the cantilever section 2b undergoes multi-stage bending and shaping to avoid the defects of easy cracking and large springback caused by a single large-angle bend: The first step is to bend the cantilever part 2b upwards by 45° relative to the strip part 2a to complete the pre-bending angle. At this time, the middle material of the cantilever part 2b is close to the local structure of the three-dimensional connecting material 122, which reduces the amount of material deformation in the subsequent deformation steps. The second step is to perform preliminary deformation according to the external structure of the three-dimensional fixing part 12. In this stage, the radius of the transition fillet between each adjacent plane is set to be greater than the final design fillet radius of the product to reserve shaping allowance, reduce molding stress, and avoid the material being broken due to excessive deformation at one time. The third step involves fine-tuning the three-dimensional fixing part 12 to ensure that all bending surfaces and three-dimensional connecting structures meet the design dimensions and shape requirements, and finally, the transition fillets are reduced to the radius specified in the drawing. At this point, the three-dimensional fixing part 12 has planes in different directions, which can play a self-supporting role. The local and overall parts are no longer easily bent or changed, and can resist the influence of all bending operations on the conveying direction of the connecting area 21.

[0032] 3.4 Trimming like Figure 2 and Figure 5 As shown, the J-shaped scrap 24 on one side of the strip portion 2a is cut along the contour to precisely machine the entire outer contour of the main plane portion 11 and the auxiliary fixing surface 141. With the three-dimensional fixing portion 12 having a complete shape, the J-shaped scrap 24 has completed its temporary reinforcement function. In order to fit the contour of the rest of the product, the J-shaped scrap 24 needs to be cut off immediately.

[0033] 3.5 Hole Cutting like Figure 5 As shown, an auxiliary fixing hole 142 is cut out on the auxiliary fixing surface 141, and then a waist-shaped hole 1213 is punched out on the two second bending surfaces 1212 blanks simultaneously to ensure the hole size and flatness.

[0034] In the temporary structure of product area 22, the auxiliary fixing hole 142 and the waist-shaped hole 1213 are generally oriented on the same side. When the three-dimensional fixing part 12 is stable, the auxiliary fixing hole 142 and the waist-shaped hole 1213 can be processed one after another or simultaneously.

[0035] 3.6 Embossing like Figure 5 As shown, two types of forming processes are completed simultaneously on the strip 2a: one is to stamp out all the reinforcing protrusions 132 on the reinforcing fixing surface 131 as a whole; the other is to stamp out the discontinuity structure between the auxiliary fixing surface 141 and the main plane part 11.

[0036] Although the reinforcing convex 132 and the discontinuity structure are located on two relatively independent structures, the extrusion deformation at both locations is small, so they are combined and completed in the same step.

[0037] 3.7 Bending like Figure 6As shown, the blank between the main plane part 11 and the reinforcing fixing surface 131 is bent. This bending adopts a two-step progressive bending process: the first step is to bend 45° to complete the pre-bending, and the second step is to continue bending to 90°, finally forming a folded edge structure with the main plane part 11 perpendicular to the reinforcing fixing surface 131. The step-by-step bending can effectively control the bending springback and ensure the perpendicularity accuracy.

[0038] 3.8 Step-by-step material feeding like Figure 6 As shown, this workstation adopts a two-step blanking scheme to avoid product deformation caused by severe vibration during overall blanking. The specific steps are as follows: Step 1: Cut off the T-shaped scrap 25 between the reinforcing fixing surface 131 and the connecting area 21. The T-shaped scrap 25 surrounds the process positioning hole 251. While cutting off the T-shaped scrap 25, cut out all the reinforcing fixing holes 133 on the reinforcing fixing surface 131, and simultaneously punch out a round hole 1214 on one of the first bending surfaces 1211. After cutting off the T-shaped scrap 25, only two narrow connecting edges remain between the reinforcing fixing surface 131 and the connecting area 21, achieving a semi-detached state for the product. The second step is material unloading: cut off the two connecting edges mentioned above, completely remove the connecting area 21, and the formed tailgate lock cover reinforcing bracket 1 will automatically fall off the material belt 2, and the single-station processing cycle will end.

[0039] The punching of the reinforcing fixing hole 133 and the round hole 1214 is set before the second blanking step because all the bending operations of the overall product structure have been completed beforehand, so there will be no more material stretching parallel to the local plate surface on any surface. At this time, the hole diameter and positional accuracy will be higher. The punching directions of the T-shaped scrap 25, the reinforcing fixing hole 133, and the round hole 1214 are all vertical directions of the progressive die, and they are relatively far apart. Therefore, in order to save die length, the three punching stations are combined.

[0040] The material belt 2 continues to be conveyed forward, and each station repeats the above process in a cycle to realize the continuous automated stamping production of the tailgate lock cover reinforcement bracket.

[0041] IV. Core Advantages of this Implementation Method 1. The entire process adopts progressive die continuous processing, integrating punching, trimming, bending, embossing and blanking into one production line. During the trimming step, J-shaped waste 24 is temporarily retained to maintain the integrity of the material on the opposite side of the three-dimensional fixing part 12. After the three-dimensional fixing part 12 completes the overall bending and forming, the J-shaped waste 24 is removed, which ensures the forming accuracy and high production efficiency. 2. The three-dimensional fixing part 12 and the reinforced fixing surface 131 both adopt the step-by-step bending and pre-large rounded corner preliminary deformation process, which effectively improves the problems of sheet metal bending springback and cracking, and improves the consistency of product dimensions. 3. Multiple sets of positioning holes and guide folds 213 are added, which, combined with the step-by-step material feeding structure, greatly improve the accuracy of material conveying and the product forming yield. 4. Each hole is processed at a corresponding workstation according to its structural characteristics. The process layout is reasonable and does not interfere with each other, making it suitable for the mass production of complex and irregular stamped parts.

[0042] The above descriptions are merely some embodiments of the present invention. Those skilled in the art can make various modifications and improvements without departing from the inventive concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A continuous stamping method for a tailgate lock cover reinforcing bracket, used to form the tailgate lock cover reinforcing bracket, the tailgate lock cover reinforcing bracket comprising an integrally connected main planar portion, a three-dimensional fixing portion, a reinforcing fixing portion, and an auxiliary fixing portion, wherein the reinforcing fixing portion and the auxiliary fixing portion are connected side-by-side to a first side of the main planar portion, and the three-dimensional fixing portion is connected to a second side of the main planar portion, the first side and the second side being opposite in direction; the three-dimensional fixing portion comprises two L-shaped support materials and a three-dimensional connecting material located between the two L-shaped support materials, the L-shaped support materials comprising a first bending surface perpendicularly connected to the main planar portion and a second bending surface perpendicularly connected to the other side of the first bending surface, the second bending surface being parallel to the main planar portion, and the two sides of the three-dimensional connecting material being seamlessly and smoothly transitioned to the two first bending surfaces and the two second bending surfaces respectively; the reinforcing fixing portion comprises a reinforcing fixing surface perpendicularly connected to the main planar portion and a plurality of reinforcing protrusions located on the reinforcing fixing surface; the auxiliary fixing portion comprises an auxiliary fixing surface having a discontinuity with the main planar portion; characterized in that... The steps include: S1. Punching positioning holes: The material strip is conveyed forward using both sides as positioning references. The processing unit of the material strip includes a strip-shaped connecting area and a product area connected to one side of the connecting area. A main positioning hole is punched in the connecting area as a positioning reference for subsequent work stations. S2, External trimming: Cutting off L-shaped waste from the strip, leaving an integrally connected strip portion and a cantilever portion connected to one side of the strip portion. The L-shaped waste is located on the opposite side of the connecting area. The strip portion includes all the material of the connecting area, the main plane portion, the reinforcing fixing portion, and the auxiliary fixing portion. The cantilever portion includes all the material of the three-dimensional fixing portion. S3. Step-by-step deformation: First, bend the cantilever part upward at 45° relative to the strip part, then perform preliminary deformation according to the structure of the three-dimensional fixing part, and finally complete the shaping according to the structure of the three-dimensional fixing part. In the preliminary deformation, the radius of the transition fillet between each plane is greater than its final radius. S4. Trimming: Cut off the J-shaped waste material from one side of the strip to obtain the entire outer contour of the main plane part and the auxiliary fixing part; S5. Embossing: Simultaneously stamp out all reinforcing convex bulges and the gap between the auxiliary fixing surface and the main plane portion on the strip-shaped portion; S6. Bending: Folding out a folded edge between the main plane portion and the reinforcing fixing surface on the strip portion; S7. Material removal: Cut off the connecting area to cause the tailgate lock cover reinforcement bracket to fall off.

2. The continuous stamping method for the tailgate lock cover reinforcing bracket according to claim 1, characterized in that: The punching positioning hole step also cuts out a trimming positioning hole, which is located in the area surrounded by the L-shaped waste and close to the root of the cantilever.

3. The continuous stamping method for the tailgate lock cover reinforcing bracket according to claim 1, characterized in that: The punching positioning hole step also involves cutting two side notches of waste material on the same side of the strip portion. In the external trimming step, the 90° between the two side notches of waste material is bent into a guide fold. The guide fold is located in the middle of two adjacent main positioning holes and is opposite to the dividing line between the main plane portion and the three-dimensional fixing portion.

4. The continuous stamping method for the tailgate lock cover reinforcing bracket according to claim 1, characterized in that: The punching positioning hole step also cuts out a process positioning hole in the middle of the strip as an auxiliary positioning reference; the blanking step is divided into two steps. The first step is to cut off the T-shaped waste material located between the reinforcing fixing surface and the connecting area, so that the reinforcing fixing surface and the connecting area are connected by two connecting edges, and the T-shaped waste material surrounds the process positioning hole; the second step is to cut off the two connecting edges.

5. The continuous stamping method for the tailgate lock cover reinforcing bracket according to claim 4, characterized in that: The reinforcing fixing surface is provided with a number of reinforcing fixing holes, all of which are cut out at the same time as the T-shaped waste is removed.

6. The continuous stamping method for the tailgate lock cover reinforcing bracket according to claim 4, characterized in that: One of the first bending surfaces has a circular hole, which is cut out at the same time as the T-shaped waste is removed.

7. The continuous stamping method for the tailgate lock cover reinforcing bracket according to claim 1, characterized in that: The auxiliary fixing surface is provided with an auxiliary fixing hole, which is cut out between the trimming step and the embossing step.

8. The continuous stamping method for the tailgate lock cover reinforcing bracket according to claim 1, characterized in that: Each of the two second bending surfaces is provided with a waist-shaped hole, which is cut out between the trimming step and the embossing step.

9. The continuous stamping method for the tailgate lock cover reinforcing bracket according to claim 1, characterized in that: The bending process is achieved through two steps: first, bending at 45°, and then bending at 90°.

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