A stamping die guide structure for a rear door inner panel reinforcement
By using a split guide sleeve structure and wear-resistant coating design, the problem of severe wear of traditional mold guide sleeves has been solved, improving stamping accuracy and production efficiency while reducing maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XUANCHENG HONGRUI MACHINERY MFG
- Filing Date
- 2025-07-04
- Publication Date
- 2026-07-14
AI Technical Summary
The traditional rear door inner panel reinforcement stamping die guide structure has low maintenance efficiency. The guide sleeve wear is serious, which affects the stamping accuracy and die life. Moreover, the inconvenience of replacement leads to production interruption and high maintenance costs.
It adopts a split guide sleeve structure, with the inner sleeve and outer sleeve connected by a multi-start trapezoidal thread. The inner sleeve has a guide bevel and chrome plating, while the outer sleeve has an annular groove and an elastic buffer pad. The outer surface of the inner sleeve is coated with a ceramic-based composite coating, and the guide post has a chamfer, achieving a detachable and wear-resistant design.
It improves guiding accuracy and stamping quality, reduces maintenance costs and time, extends mold life, and ensures production continuity.
Smart Images
Figure CN224487407U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of automotive mold technology, specifically, it relates to a stamping die guide structure for a rear door inner panel reinforcement. Background Technology
[0002] In the stamping production of automotive parts, the stamping process for rear door inner panel reinforcement typically has the following characteristics: multi-stage stamping, requiring multiple die opening and closing operations; high stamping pressure; and long service life requirements. The specific structure of the rear door inner panel reinforcement is as follows: Figure 2 As shown, the guiding system of a die is a key component ensuring stamping accuracy and die life. Traditional stamping die guide sleeves are typically an integral structure, fixed to the lower die plate. While this structure is relatively simple in design, it presents numerous problems in practical use. Due to the high-frequency impacts and friction generated during stamping, the frequent impacts and friction lead to accelerated wear on the guide sleeve surface, thus affecting its guiding accuracy. When the guide sleeve wears to a certain extent, the alignment accuracy of the punch and die decreases, resulting in dimensional deviations and burrs in the stamped parts, severely impacting product quality. Once the guide sleeve is severely worn and needs replacement, the entire die must be disassembled, which is not only time-consuming and labor-intensive but also causes production interruptions, reducing production efficiency. Furthermore, frequent disassembly and installation can damage other components of the die, further increasing maintenance costs.
[0003] In summary, the existing stamping die guide structure for the rear door inner panel reinforcement has the problem of low maintenance efficiency. Utility Model Content
[0004] In view of this, the present invention provides a stamping die guide structure for the reinforcement of the rear door inner panel, which can solve the problem of low maintenance efficiency of traditional dies.
[0005] This utility model is implemented as follows:
[0006] This utility model provides a stamping die guide structure for a rear door inner panel reinforcement, including an upper die, a lower die, a guide post, and a guide sleeve. The guide post is fixedly connected to the lower surface of the upper die, and the guide sleeve is fixedly installed on the upper surface of the lower die. The upper die and the lower die are adapted to each other, and the guide post and the guide sleeve are adapted to each other. The axis of the guide post coincides with the stamping center line of the die. The guide sleeve is a split structure, including an inner sleeve and an outer sleeve. The inner sleeve and the outer sleeve are detachably connected by a multi-start trapezoidal thread. The upper end of the inner sleeve is provided with a guide slope, which facilitates the insertion of the guide post.
[0007] Based on the above technical solution, the stamping die guide structure of the rear door inner panel reinforcement of this utility model can be further improved as follows:
[0008] The inner diameter of the inner sleeve and the outer diameter of the guide post have a clearance of 0.2 mm.
[0009] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: it limits the fitting clearance, ensuring smooth sliding of the guide column while avoiding a decrease in stamping accuracy caused by excessive clearance. The larger the rear door inner panel reinforcement, the larger the stamping die usually needs to be. A larger die requires higher guiding accuracy to ensure the quality of the stamped part. If the rear door inner panel reinforcement is very large, the stamping accuracy requirement is high, and a smaller fitting clearance results in higher accuracy.
[0010] Furthermore, the angle of the guide bevel is 30° to 60°, the upper end of the guide bevel is flush with the upper end face of the inner sleeve, and the lower end smoothly transitions with the inner hole of the inner sleeve.
[0011] The beneficial effects of adopting the above-mentioned improved scheme are as follows: The angle range of the guide ramp is clearly defined, ensuring the guiding effect. An angle between 30° and 60° is neither too steep, causing insertion difficulties, nor too gentle, resulting in inconspicuous guidance. A smooth transition avoids stress concentration and extends the service life of the inner sleeve. The stamping of the rear door inner panel reinforcement typically requires high-precision alignment; the guide ramp effectively improves the guiding effect and ensures the dimensional stability of the stamped parts.
[0012] Furthermore, the lower end of the guide post is chamfered, with an angle of 15° to 30°, to prevent the guide post from getting stuck when inserted.
[0013] The beneficial effects of adopting the above-mentioned improvement scheme are: the chamfer effectively avoids interference between the guide post and the edge of the inner hole during insertion, reducing the possibility of jamming.
[0014] Furthermore, the inner hole surface of the inner sleeve is chrome-plated with a plating thickness of 0.01-0.03mm to reduce friction and wear with the guide post.
[0015] The beneficial effects of adopting the above-mentioned improvement scheme are as follows:
[0016] Furthermore, the outer wall of the outer jacket is provided with an annular groove, the depth of which is 1:2 of the outer jacket wall thickness. An elastic buffer pad is provided inside the annular groove to reduce vibration and impact during stamping.
[0017] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: through the design of the annular groove and elastic buffer pad, vibration energy can be effectively absorbed, noise can be reduced, mold life can be extended, and the quality of stamped parts can be improved.
[0018] Furthermore, the outer surface of the inner sleeve is coated with a wear-resistant coating, which is a ceramic-based composite coating with a thickness of 0.05-0.1 mm and a coefficient of friction of less than 0.1. The wear-resistant coating is used to improve the service life of the inner sleeve.
[0019] The beneficial effects of adopting the above-mentioned improvement scheme are: the wear-resistant coating can significantly improve the wear resistance of the inner sleeve, extend its service life, reduce the replacement frequency, and thus reduce maintenance costs.
[0020] Compared with the prior art, the beneficial effects of the stamping die guide structure for the rear door inner panel reinforcement provided by this utility model are:
[0021] 1. The guide post is in direct contact with the inner sleeve. After the inner sleeve is worn due to friction, it can be directly removed and replaced with a new inner sleeve without disassembling the outer sleeve or the entire mold, thus improving maintenance efficiency.
[0022] 2. The core concept of a split guide sleeve is introduced, solving the problem of the difficulty in replacing traditional integral guide sleeves. The multi-start trapezoidal thread connection provides reliable connection strength and convenient quick disassembly. The guide bevel simplifies the insertion process of the guide post, improves assembly efficiency, and reduces the difficulty of mating.
[0023] 3. The stamping dies for the rear door inner panel reinforcement are usually large, and the guide pillars and guide sleeves are also large in size, making the replacement cost of integral guide sleeves high. The split design makes it easier to replace worn parts individually, reducing maintenance costs. Attached Figure Description
[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0025] Figure 1 A schematic diagram of a stamping die guide structure for a rear door inner panel reinforcement;
[0026] Figure 2 This is a structural schematic diagram of the rear door inner panel reinforcement component;
[0027] The attached diagram lists the components represented by each number as follows:
[0028] 10. Upper template; 20. Lower template; 30. Guide column; 40. Guide sleeve; 41. Inner sleeve; 42. Outer sleeve; 50. Guide slope. Detailed Implementation
[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.
[0030] like Figure 1 The diagram shows an embodiment of a stamping die guide structure for a rear door inner panel reinforcement provided by this utility model. In this embodiment, it includes an upper template 10, a lower template 20, a guide post 30, and a guide sleeve 40. The guide post 30 is fixedly connected to the lower surface of the upper template 10, and the guide sleeve 40 is fixedly provided on the upper surface of the lower template 20. The upper template 10 and the lower template 20 are adapted to each other, and the guide post 30 and the guide sleeve 40 are adapted to each other. The axis of the guide post 30 coincides with the stamping center line of the die. The guide sleeve 40 is a split structure, including an inner sleeve 41 and an outer sleeve 42. The inner sleeve 41 and the outer sleeve 42 are detachably connected by a multi-start trapezoidal thread. The upper end of the inner sleeve 41 is provided with a guide slope 50, which facilitates the insertion of the guide post 30.
[0031] In the above technical solution, the clearance between the inner hole of the inner sleeve 41 and the outer diameter of the guide post 30 is 0.2mm.
[0032] Furthermore, in the above technical solution, the angle of the guide slope 50 is 30° to 60°, the upper end of the guide slope 50 is flush with the upper end face of the inner sleeve 41, and the lower end smoothly transitions with the inner hole of the inner sleeve 41.
[0033] Furthermore, in the above technical solution, the lower end of the guide post 30 is provided with a chamfer, the chamfer angle being 15° to 30°, the chamfer being used to prevent the guide post 30 from getting stuck when inserted.
[0034] Furthermore, in the above technical solution, the inner hole surface of the inner sleeve is chrome-plated with a plating thickness of 0.01-0.03mm to reduce friction and wear with the guide post.
[0035] Furthermore, in the above technical solution, the outer wall of the outer jacket 42 is provided with an annular groove, the ratio of the depth of the annular groove to the wall thickness of the outer jacket 42 is 1:2, and an elastic buffer pad is provided inside the annular groove to reduce vibration and impact during stamping.
[0036] Furthermore, in the above technical solution, the outer surface of the inner sleeve 41 is coated with a wear-resistant coating. The wear-resistant coating is a ceramic-based composite coating with a thickness of 0.05-0.1 mm and a coefficient of friction of less than 0.1. The wear-resistant coating is used to improve the service life of the inner sleeve.
[0037] In use, the inner sleeve is fixedly connected to the outer sleeve via a multi-start trapezoidal thread, ensuring the guide bevel faces upwards. The guide sleeve assembly is fixed to the lower template, and the guide post is fixed to the lower surface of the upper template, ensuring axis alignment. The sheet material to be processed is placed on the lower template, and the press is started. As the upper template descends, the guide post is inserted along the inner hole of the inner sleeve, guided by the guide bevel for centering, and chamfered to prevent jamming. After stamping, the upper template moves upwards, the guide post retracts from the inner sleeve, and the elastic buffer pad absorbs vibration and impact. If the inner sleeve is severely worn, the multi-start trapezoidal thread can be removed, and a new inner sleeve can be replaced.
[0038] Example 1
[0039] In automobile manufacturing, the rear door inner panel reinforcement is a critical structural component used to enhance the rigidity and deformation resistance of the rear door. Due to the complex shape of the rear door inner panel reinforcement (typically with multiple bends and protrusions), the stamping process requires a high-precision guiding system to ensure accurate die alignment and prevent stamping misalignment or deformation. Traditional integral guide bushings are prone to wear after long-term use and are inconvenient to replace, leading to a decrease in die precision. Therefore, designing a detachable, wear-resistant, and easy-to-maintain split guide bushing can significantly improve stamping efficiency and product quality.
[0040] Fix the upper template to the press slide and the lower template to the worktable. Check the clearance between the guide post and the guide sleeve to ensure alignment accuracy. Confirm that the guide bevel of the inner sleeve and the chamfer of the guide post are free from wear or deformation. The rear door inner panel reinforcement is made of DC04 cold-rolled steel sheet (1.0mm thick) with a rust-preventive oil coating. Cut the steel sheet into blanks that meet the stamping dimensions and clean the edge burrs. Place the blank on the die of the lower template and fix it with a locating pin or pneumatic clamp to ensure alignment between the blank and the die. The bent part of the rear door inner panel reinforcement must perfectly match the shape of the die cavity to avoid stamping misalignment. Start the press, the upper template moves downward, and the guide post first contacts the guide bevel of the inner sleeve. The bevel guides the guide post to accurately insert into the inner sleeve to prevent jamming. After the guide post is fully inserted, the chrome-plated inner hole reduces friction and ensures die alignment accuracy. The upper die's punch engages with the lower die's die to press the blank into shape, forming the bends, protrusions, and reinforcing ribs of the rear door inner panel reinforcement. The stamping pressure is controlled at 100-150 tons to ensure the material does not deform or crack. After stamping, the upper die moves upward, and the guide pillars retract from the inner sleeve. The ejection mechanism of the lower die ejects the formed rear door inner panel reinforcement from the mold.
[0041] Specifically, the principle of this utility model is as follows: The guide sleeve consists of an inner sleeve and an outer sleeve, connected by a multi-start trapezoidal thread for easy disassembly and maintenance. The guide bevel design of the inner sleeve ensures smooth insertion of the guide post and avoids jamming. The fit clearance between the inner hole of the inner sleeve and the guide post is 0.2mm, ensuring precise guidance. The axis of the guide post coincides with the center line of the mold, ensuring stamping accuracy. The split-type guide sleeve facilitates the replacement of worn parts and extends the mold life.
[0042] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.
Claims
1. A stamping die guide structure for a rear door inner panel reinforcement, comprising an upper template (10), a lower template (20), a guide post (30), and a guide sleeve (40), wherein the guide post (30) is fixedly connected to the lower surface of the upper template (10), and the guide sleeve (40) is fixedly disposed on the upper surface of the lower template (20), the upper template (10) and the lower template (20) are adapted to each other, the guide post (30) and the guide sleeve (40) are adapted to each other, and the axis of the guide post (30) coincides with the stamping center line of the die, characterized in that, The guide sleeve (40) is a split structure. The guide sleeve (40) includes an inner sleeve (41) and an outer sleeve (42). The inner sleeve (41) and the outer sleeve (42) are detachably connected by a multi-start trapezoidal thread. The upper end of the inner sleeve (41) is provided with a guide slope (50), which facilitates the insertion of the guide post (30).
2. The stamping die guide structure for a rear door inner panel reinforcement according to claim 1, characterized in that, The clearance between the inner hole of the inner sleeve (41) and the outer diameter of the guide post (30) is 0.2 mm.
3. The stamping die guide structure for the rear door inner panel reinforcement according to claim 2, characterized in that, The guide slope (50) has an angle of 30° to 60°. The upper end of the guide slope (50) is flush with the upper end face of the inner sleeve (41), and the lower end smoothly transitions with the inner hole of the inner sleeve (41).
4. The stamping die guide structure for a rear door inner panel reinforcement according to claim 3, characterized in that, The lower end of the guide post (30) is chamfered, with an angle of 15° to 30°. The chamfer is used to prevent the guide post (30) from getting stuck when inserted.
5. The stamping die guide structure for a rear door inner panel reinforcement according to claim 4, characterized in that, The inner hole surface of the inner sleeve is chrome-plated with a plating thickness of 0.01-0.03mm to reduce friction and wear with the guide post.
6. The stamping die guide structure for a rear door inner panel reinforcement according to claim 5, characterized in that, The outer wall of the outer jacket (42) is provided with an annular groove. The ratio of the depth of the annular groove to the wall thickness of the outer jacket (42) is 1:
2. An elastic buffer pad is provided inside the annular groove. The elastic buffer pad is used to reduce vibration and impact during stamping.
7. The stamping die guide structure for a rear door inner panel reinforcement according to claim 6, characterized in that, The outer surface of the inner sleeve (41) is coated with a wear-resistant coating. The wear-resistant coating is a ceramic-based composite coating with a thickness of 0.05-0.1 mm and a friction coefficient of less than 0.
1. The wear-resistant coating is used to improve the service life of the inner sleeve.